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US20100040474A1 - Fixing device for rotary blade - Google Patents

Fixing device for rotary blade Download PDF

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Publication number
US20100040474A1
US20100040474A1 US12/448,814 US44881407A US2010040474A1 US 20100040474 A1 US20100040474 A1 US 20100040474A1 US 44881407 A US44881407 A US 44881407A US 2010040474 A1 US2010040474 A1 US 2010040474A1
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US
United States
Prior art keywords
flange
rotary blade
fixing
intermediate flange
spindle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/448,814
Other languages
English (en)
Inventor
Yuji Takahashi
Yoichiro Koike
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Makita Corp
Original Assignee
Makita Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Makita Corp filed Critical Makita Corp
Assigned to MAKITA CORPORATION reassignment MAKITA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOIKE, YOICHIRO, TAKAHASHI, YUJI
Publication of US20100040474A1 publication Critical patent/US20100040474A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/38—Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/38—Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing
    • B27B5/381—Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing with at least one brake member contacting saw blade portions

Definitions

  • the present invention relates to a fixing device, for example, for attaching a circular cutting blade (rotary blade) to a spindle in a portable circular saw and to a tool-less type fixing device which can easily be fastened by a manual manipulation and which can reliably prevent slippage (relative rotation) of the rotary blade relative to the spindle during use thereof.
  • a fixing device for example, for attaching a circular cutting blade (rotary blade) to a spindle in a portable circular saw and to a tool-less type fixing device which can easily be fastened by a manual manipulation and which can reliably prevent slippage (relative rotation) of the rotary blade relative to the spindle during use thereof.
  • the conventional fixing device is constructed to have a ratchet mechanism for engaging and disengaging meshing of teeth with recessed portions on the outer peripheral side by displacing claw portions in a radial direction thereof.
  • Patent Document 1 Japanese Laid-Open Patent Publication No. 2001-96407
  • the present invention has been made for the purpose of providing a fixing device for a rotary blade, with which the rotary blade can be firmly fixed by a manual manipulation, in which slippage of the rotary blade relative to a spindle is not caused owing to cutting resistance or at a time of braking, and which is compact in a radial direction thereof and consequently can easily be applied to a circular saw capable of performing the oblique cutting.
  • the present invention provides a fixing device having structures described in respective claims.
  • a relative rotational force is imparted between an intermediate flange and an inner flange or an outer flange, and the relative rotational force is converted into an axial force in a direction of an axis of a spindle via a cam meshing portion.
  • the axial force is added to a clamping force of a fixing flange.
  • the axial force produced in the cam meshing portion provided between the intermediate flange and the inner flange or the outer flange is utilized. Therefore, the rotary blade can be more firmly fixed without impairing compactness in the radial direction of the spindle, and eventually, can be easily applied to a circular saw or the like provided with a function of oblique cutting.
  • the rotational resistance against the rotary blade acts as an external force for displacing the rotary blade in the rotational direction relative to the spindle (rotational force, hereinafter also simply referred to as rotational resistance).
  • rotational resistance rotational force
  • the inner flange is fixed to the rotation fixing portion with respect to the rotation
  • the intermediate flange is mounted to the rotation fixing portion so as to be relatively rotatable.
  • the rotational resistance imparted to the rotary blade acts as a rotational force for rotating the intermediate flange with respect to the spindle.
  • the intermediate flange when being displaced in the rotational direction relative to the spindle, the intermediate flange is displaced in the rotational direction relative to the outer flange whose rotation is restricted by the rotation fixing portion.
  • the intermediate flange When the intermediate flange is displaced in the rotational direction relative to the outer flange, displacements of cam portions thereof in the circumferential direction (sliding operation) are produced.
  • the rotational resistance partially acts on the intermediate flange as a force component (axial force) in the direction of the axis of the spindle, and acts on the intermediate flange as a pressing force to the rotary blade.
  • rotational resistance when high rotational resistance at the time of working or high inertia at the time of braking (hereinafter also simply referred to as rotational resistance) is imparted to the rotary blade, the rotational resistance or the like is partially converted via the sliding operation between the cam portions of the intermediate flange and the cam portions of the outer flange into an axial force for pressing the intermediate flange against the rotary blade. As a result, slippage in the rotational direction of the rotary blade relative to the inner flange can be prevented.
  • the axial force is produced by the sliding operation of the cam portions provided on the surfaces opposed to each other of the intermediate flange and the outer flange, and the clamping force of the rotary blade between the inner flange and the intermediate flange is increased by the axial force.
  • the movement in the radial direction of the spindle is not utilized, and hence the size in the radial direction of the fixing device is more easily compactified in comparison with that of conventional ones.
  • the sizes in the radial direction and the axial direction of the spindle of the fixing device are compactified, whereby it is possible to set the inclination angle of the rotary blade of a portable circular saw at the time of oblique cutting to be large, and also possible to set the cutting depth into the material subjected to cutting to be large. Accordingly, the fixing device can be easily applied to the portable circular saw or the like.
  • the rotational force of the rotary blade (inertia at the time of activation or stopping and rotational resistance at the time of processing) is reliably transmitted to the intermediate flange so that the sliding operation of the cam portions can be efficiently produced. With this, it is possible to efficiently increase the pressing force of the intermediate flange to the rotary blade.
  • the frictional resistance of the intermediate flange relative to the rotary blade can be properly set based on materials thereof and an average diameter in the contact area. Further, inversely, a lubricant is interposed or applied between the cam surfaces of the cam portions, or the inclination angle of the cam surface is properly set, whereby the sliding resistance of the cam portions is reduced as much as possible in comparison with the frictional resistance of the intermediate flange relative to the rotary blade.
  • the intermediate flange having the cam portions and the rotary blade are more easily displaced in the rotational direction relative to the inner flange, and eventually, to the spindle.
  • the cam portions are reliably restored to an initial position of meshing most deeply with each other, and a screw coupling force (screwing force) of the fixing flange to the spindle is weakened.
  • screw coupling force screw force
  • the inner flange is fixed to the rotation fixing portion of the spindle with a play within a predetermined angular range. Therefore, the displacement of the intermediate flange relative to the rotation fixing portion is more easily obtained at the time no rotational resistance is not imparted to the rotary blade. With this, the fixing device smoothly shifts to a state in which the cam portions of the intermediate flange and the cam portions of the outer flange mesh most deeply with each other, whereby the screw coupling force of the fixing flange is reliably loosened.
  • the cam portions of the intermediate flange and the cam portions of the outer flange are reliably restored to the initial position (position of meshing most deeply with each other) by an elastic force of the cover. Therefore, the screw coupling force of the fixation flange is reliably loosened.
  • the intermediate flange is restored to the initial position by an initial position biasing means, and the fixing device can be reliably shifted so that the cam portions of the intermediate flange and the cam portions of the outer flange mesh most deeply with each other.
  • the screw coupling force of the fixing flange relative to the spindle is loosened, whereby the fixing flange can be easily loosened with a small force in the case of replacing the rotary blade or the like.
  • a fixing device as described in claim 8 when the cam meshing portion is positioned on the side (inner flange side) opposite to that in the structure described in claim 2 relative to the rotary blade, the same operation and effects as those in the case of the structure described in claim 2 can also be obtained. Also in the fixing device described in claim 8 , at the time no rotational resistance is imparted to the rotary blade, the intermediate flange is reliably displaced in the rotational direction. Thus, the fixing device reliably shifts to the state (initial state) in which the cam portions of the intermediate flange and the cam portions of the inner flange mesh most deeply with each other. With this, it is possible to reliably loosen the screw coupling force of the fixing flange relative to the spindle, thereby possible to easily loosen the fixing flange with a small rotational manipulating force.
  • the cam meshing portions are arranged on both sides relative to the rotary blade.
  • the displacements of an inner intermediate flange and an outer intermediate flange in the direction of the axis of the spindle approximately double, the deepest meshing with the cam portions occurring at the time no rotational resistance is imparted to the rotary blade. Therefore, the screw coupling force of the fixing flange relative to the spindle can be loosened more reliably.
  • the inner intermediate flange and the outer intermediate flange are more easily displaced in the rotational directions. Accordingly, it is ensured that the cam portions shift to a state of meshing most deeply with each other, whereby the screw coupling force of the fixing flange relative to the spindle can be loosened.
  • FIG. 1 is a vertical sectional view of a fixing device according to a first embodiment, for illustrating a state of a rotary blade fixed to a spindle by means of the fixing device.
  • FIG. 2 is an exploded view of the fixing device according the first embodiment.
  • FIG. 3 is a view taken from the direction of arrows (III)-(III) of FIG. 2 , and is a plan view of an intermediate flange.
  • FIG. 4 is a sectional view taken along arrows (IV)-(IV) of FIG. 3 , and is a developed view of cam portions of the intermediate flange.
  • FIG. 5 is a view taken from the direction of the arrows (V)-(V) of FIG. 2 , and is a plan view of an outer flange.
  • FIG. 6 is a plan view of a fixing flange.
  • FIG. 7 is a vertical sectional view of a fixing device according to a second embodiment, for illustrating the state of the rotary blade fixed to the spindle by means of the fixing device.
  • FIG. 8 is a horizontal sectional view of a fixing device according to a third embodiment, for illustrating the state of the rotary blade fixed to the spindle by means of the fixing device.
  • FIG. 9 is a vertical sectional view of a fixing device according to a fourth embodiment, for illustrating the state of the rotary blade fixed to the spindle by means of the fixing device.
  • FIG. 10 is a vertical sectional view of a fixing device according to a fifth embodiment, for illustrating the state of the rotary blade fixed to the spindle by means of the fixing device.
  • FIG. 11 is a vertical sectional view of a fixing device according to a sixth embodiment, for illustrating the state of the rotary blade fixed to the spindle by means of the fixing device.
  • FIG. 12 is a sectional view taken along arrows (XII)-(XII) of FIG. 11 , and is a horizontal sectional view of the fixing device according to the sixth embodiment.
  • FIGS. 1 to 6 a first embodiment of the present invention is described with reference to FIGS. 1 to 6 .
  • a fixing device 10 for mounting a disk-shaped rotary blade 2 to a spindle 1 of a portable circular saw.
  • the spindle 1 of a circular sawing machine is rotated about an axis J by a drive motor incorporated in a main body.
  • a small diameter portion 1 c is formed in a stepped configuration to form an end portion Sa perpendicular to the axis J.
  • Flat surfaces 1 a and 1 a parallel with each other are provided on the small diameter portion 1 c, with the axis J positioned therebetween.
  • the two flat surfaces 1 a and 1 a define a so-called two surface width portion S having an oval shape in cross-section at the small diameter portion 1 c of the spindle 1 .
  • the two surface width portion S corresponds to an example of the rotation fixing portion described in claims.
  • the two surface width portion S is refereed to as a rotation fixing portion S.
  • a threaded hole 1 b is provided in the leading end surface of the spindle 1 (leading end surface of the rotation fixing portion S).
  • the threaded hole 1 b is provided along the central axis J of the spindle 1 at a predetermined depth.
  • the rotary blade 2 is mounted to the rotation fixing portion S of the spindle 1 so as to be immovable in the direction of the axis J and non-rotatable about the axis J.
  • the fixing device 10 includes an inner flange 11 for contacting with one side surface of the rotary blade 2 (left side surface in FIGS. 1 and 2 ), an intermediate flange 12 for contacting with the other end surface of the rotary blade 2 (right side surface in FIGS. 1 and 2 ), an outer flange 13 for clamping the intermediate flange 12 between the outer flange 13 and the rotary blade 2 , and a fixing flange 14 for clamping the outer flange 13 between the fixing flange 14 and the intermediate flange 12 .
  • the inner flange 11 has a disk shape, and an oval through-hole 11 a is provided at the center thereof.
  • the rotation fixing portion S is inserted into the through-hole 11 a.
  • the inner flange 11 is mounted to the spindle 1 in a state of being fixed with respect to the rotation.
  • the inner flange 11 is mounted to the end portion Sa of the rotation fixing portion S in a state of being in contact therewith while the displacement thereof in the direction of the axis J (left hand in FIGS. 1 and 2 ) is restricted.
  • An annular contact surface 11 b is provided by thinning the central portion of the side surface of the inner flange 11 on the rotary blade 2 side (right side surface in the figure). The contact surface 11 b is brought to contact with the one side surface of the rotary blade 2 (left side surface in the figure).
  • the inner flange 11 is mounted to the rotation fixing portion S of the spindle 1 , and then the rotary blade 2 is mounted thereto.
  • a circular attachment hole 2 a is provided at the center of the rotary blade 2 .
  • the rotation fixing portion S is inserted into the attachment hole 2 a, and the rotary blade 2 is attached to the rotation fixing portion S of the spindle 1 .
  • the rotary blade 2 is mounted to the rotation fixing portion S while the rotation thereof about the axis J is not directly fixed.
  • a cutting edge is provided over the entire periphery of the rotary blade 2 .
  • the rotary blade 2 is mounted, and then the intermediate flange 12 is mounted thereto.
  • the intermediate flange 12 has a disk shape of substantially the same outer diameter as that of the inner flange 11 , and an attachment hole 12 a having a circular shape of the same diameter as that of the rotary blade 2 is provided at the center thereof.
  • the intermediate flange 12 is also mounted to the rotation fixing portion S while the rotation thereof about the axis J is not directly fixed.
  • An annular contact surface 12 b is provided by thinning the central portion of the side surface of the intermediate flange 12 on the rotary blade 2 side (left side surface in the figure). The contact surface 12 b is brought to contact with the other side surface of the rotary blade 2 (right side surface in the figure).
  • the frictional resistance between the contact surface 12 b of the intermediate flange 12 and the rotary blade 2 is set to be higher than the sliding resistance (frictional resistance) between cam portions 12 c and 13 d described below.
  • the contact surface 12 b of the intermediate flange 12 is treated with so-called knurling (surface treatment for increasing frictional resistance) so that the frictional resistance thereof against the rotary blade 2 is set to be increased.
  • cam surfaces of the cam portions 12 c and 13 d are formed to be flat and smooth so that the sliding resistance therebetween is set to be sufficiently lower than the frictional resistance of the intermediate flange 12 against the rotary blade 2 .
  • a plurality of cam portions 12 c - 12 c are provided on the right side surface of the intermediate flange 12 .
  • the cam portions 12 c - 12 c include the plurality (six in the figure) of cam portions 12 c - 12 c provided along the same circumference.
  • each of the cam portions 12 c has a triangular shape with its height continuously varying in accordance with the direction of the axis J.
  • a groove portion 12 d is formed over the entire peripheral surface of the intermediate flange 12 .
  • a retaining ring 15 is fitted to the groove portion 12 d.
  • the intermediate flange 12 is mounted, and then the outer flange 13 is mounted to the rotation fixing portion S.
  • the outer flange 13 also has a substantially disk shape, and an oval through-hole 13 a is provided at the center thereof similarly to the inner flange 11 .
  • the outer flange 13 is non-rotatably mounted to the rotation fixing portion S of the spindle 1 while the rotation fixing portion S is inserted into the through-hole 13 a.
  • an accommodating portion 13 b for accommodating the intermediate flange 12 is provided on the left side surface of the outer flange 13 .
  • a groove portion 13 c to which the retaining ring 15 is fitted is formed on the entire periphery of the inner wall surface of the accommodating portion 13 b.
  • the width of the groove portion 12 d on the intermediate flange 12 side is formed to be larger than that of the groove portion 13 c of the outer flange 13 side so that the retaining ring 15 is displaceable in the direction of the axis J.
  • the intermediate flange 12 and the outer flange 13 are assembled with each other so as to be relatively displaceable from each other within a small range in the direction of the axis J (range of relatively displacing in the direction of axis J due to the sliding operation of cam portions 12 c and 13 c ).
  • a plurality (six in this embodiment) of cam portions 13 d to 13 d are provided to oppose to the cam portions 12 c to 12 c of the intermediate flange 12 .
  • the plurality of cam portions 13 d to 13 d are provided along the circumference of substantially the same diameter as that of the cam portions 12 c to 12 c on the intermediate flange 12 side.
  • each of the cam portions 13 d is formed so as to be the same shape and size as that of each of the cam portions 12 c on the intermediate flange 12 side.
  • cam portions 12 c to 12 c of the intermediate flange 12 and the cam portions 13 d to 13 d of the outer flange 13 are in a state of being meshed with each other.
  • Mutual meshing between the cam portions 12 c to 12 c and the cam portions 13 d to 13 d corresponds to the cam meshing portion described in claims (hereinafter, the same applies).
  • the outer flange 13 in the state of being mounted to the spindle 1 as described later, the outer flange 13 is fixed immovably in the direction of the axis J, and therefore, when a relative rotational force with respect to the intermediate flange 12 is applied to the outer flange 13 , a part of the rotational force acts as a large external force (axial force P) in the direction of pressing the intermediate flange 12 against the rotary blade 2 through the sliding operation between the cam portions 12 c and the cam portions 13 d.
  • the axial force P acts as a clamping force for clamping the rotary blade 2 between the intermediate flange 12 and the inner flange 11 whose axial movement is restricted relative to the rotation fixing portion S.
  • an accommodating portion 13 e for accommodating the fixing flange 14 is provided on the right side surface of the outer flange 13 .
  • a groove portion 13 f is similarly formed on the entire periphery of the inner wall surface of the accommodating portion 13 e.
  • a retaining ring 16 is fitted to the groove portion 13 f.
  • annular spring accommodating portion 13 g is provided at the bottom portion of the accommodating portion 13 e.
  • a plate spring 17 for preventing backlash and loosening of the fixing flange 14 is accommodated on the inner peripheral side of the spring accommodating portion 13 g.
  • a large number of semicircular engagement recessed portions 13 h to 13 h are formed along the circumferential direction.
  • the fixing flange 14 has a substantially disk shape and a fixing thread portion 14 a provided at the center on the left side surface thereof in FIGS. 1 and 2 .
  • the fixing thread portion 14 a is screwed into the threaded hole 1 b provided in the end surface of the spindle 1 .
  • a spring step portion 14 b is provided in a stepped manner.
  • the plate spring 17 is arranged on the outer peripheral side of the spring step portion 14 b.
  • the spring step portion 14 b has substantially the same vertical size as the thickness of the plate spring 17 .
  • engagement protruding portions 17 b to 17 b are provided in a state of radially protruding toward the center.
  • engagement recessed portions 14 c to 14 c for fitting the engagement protruding portions 17 b without backlash are formed at the peripheral quadrisected positions of the spring step portion 14 b.
  • the spring step portion 14 b is inserted into the inner peripheral hole 17 a of the plate spring 17 .
  • the plate spring 17 is mounted to the spring step portion 14 b in a state of being relatively non-rotatable about the axis J, and accordingly, is integrally rotated with the fixing flange 14 by a rotational manipulation of the fixing flange 14 .
  • the plate spring 17 is provided with four engagement claw portions 17 c to 17 c projecting in a curved manner from the circumferentially quadrisected positions toward the outer peripheral side thereof and extending in the same direction substantially along the circumferential direction.
  • Each of the engagement claw portions 17 c is resiliently biased toward the radially outer peripheral side. As illustrated in FIG.
  • each of the engagement claw portions 17 c is formed so as to be a semicircular shape and are fitted by an resilient force into each of the engagement recessed portions 13 h provided in the spring accommodating portion 13 g of the outer flange 13 , and with this, the fixing flange 14 is prevented from being loosened relative to the outer flange 13 , and eventually, the fixing thread portion 14 a is prevented from being loosened relative to the threaded hole 1 b.
  • a groove portion 14 e is formed over the entire peripheral surface of the fixing flange 14 .
  • the retaining ring 16 is fitted into the groove portion 14 e.
  • the fixing flange 14 is assembled with the outer flange 13 in a state of being inseparable therefrom in the direction of the axis J and relatively rotatable about the axis J.
  • the fixing flange 14 , the outer flange 13 , and the intermediate flange 12 are assembled into one assembly.
  • the fixing thread portion 14 a of the fixing flange 14 is positioned coaxially with respect to the axis J and positioned centrally of the through-hole 13 a of the outer flange 13 and the attachment hole 12 a of the intermediate flange 12 .
  • the fixing thread portion 14 a of the fixing flange 14 is tightened into the threaded hole 1 b of the spindle 1 .
  • a pinch portion 14 d to be pinched by finger tips of a user is provided at the center of the right side surface of the fixing flange 14 .
  • a slip-preventing portion 14 f for preventing slippage at the time of rotational manipulation is provided along the annular range.
  • the user can rotationally manipulate the fixing flange 14 also by pressing the fingertips against the slip-preventing portion 14 f instead of the pinch portion 14 .
  • the rotational manipulation can be performed more quickly in the case of rotationally manipulating the fixing flange 14 by pressing the fingertips against the slip-preventing portion 14 f.
  • the fixing device 10 of the first embodiment structured as described above it is possible to firmly attach the rotary blade 2 to the spindle 1 by a manual manipulation without use of special tools, thereby enabling to reliably prevent slippage of the rotary blade 2 relative to the inner flange 11 , for example during use of the rotary tool.
  • the inner flange 11 of the fixing device 10 is first mounted to the rotation fixing portion S.
  • the inner flange 11 is mounted relatively non-rotatably to the spindle 1 in a state in which the rotation fixing portion S is inserted into the through-hole 11 a thereof.
  • the inner flange 11 is mounted, and then the rotary blade 2 is mounted to the rotation fixing portion S.
  • the rotation fixing portion S is inserted into the attachment hole 2 a of the rotary blade 2 , and the contact surface 11 b of the inner flange 11 is brought into contact with one side surface (left side surface in FIG. 1 ) of the rotary blade 2 .
  • the rotary blade 2 is rotatable about the axis J relative to the spindle 1 and the rotation fixing portion S thereof.
  • the intermediate flange 12 , the outer flange 13 , and the fixing flange 14 assembled to each other are mounted to the rotation fixing portion S.
  • the pinch portion 14 d is pinched with fingertips so as to rotationally manipulate the fixing flange 14 in a tightening direction, whereby the fixing screw portion 14 a is tightened into the threaded hole 1 b of the spindle 1 .
  • the rotation fixing portion S of the spindle 1 is inserted into the attachment hole 12 a of the intermediate flange 12 , and then into the through-hole 13 a of the outer flange 13 .
  • the fingertips are pressed against the slip-preventing portion 14 f of the fixing flange 14 so as to rotationally manipulate the fixing flange 14 , whereby the rotational manipulation can be quickly performed.
  • the plate spring 17 is integrally rotated with the fixing flange 14 .
  • the fixing flange 14 is rotated.
  • the rotational operability of the fixing flange 14 is enhanced owing to clicking sound produced at the time the engagement claw portions 17 c engage with and disengage from the engagement recessed portions 13 h.
  • the engagement claw portions 17 c are fitted into the engagement recessed portions 13 h so as to be engaged therewith, whereby the fixing flange 14 , and eventually, the fixing thread portion 14 a is prevented from being loosened relative to the threaded hole 1 b.
  • the intermediate flanges 12 and the outer flange 13 become closest to each other in the direction of the axis J, and hence the retaining ring 15 is positioned on the left side in the width direction of the groove portion 12 d of the intermediate flange 12 .
  • this rotational resistance acts as an external force in the direction of pressing the intermediate flange 12 against the rotary blade 2 because the frictional resistance of the contact surface 12 b of the intermediate flange 12 against the rotary blade 2 is larger than the sliding resistance between the cam portions 12 c to 12 c and the cam portions 13 d to 13 d, and the inner flange 11 and the outer flange 13 are rotationally integrated with each other via the rotation fixing portion S.
  • a rotational force for relatively rotating the rotary blade 2 to the spindle 1 acts as an external force in the direction of relatively displacing the cam portions 12 c to 12 c and 13 d to 13 d in the circumferential direction. Therefore, owing to the sliding operation between the cam portions 12 c and the cam portions 13 d, a force component of the rotational force in the direction of the axis J acts as the large axial force P in the direction of pressing the intermediate flange 12 against the rotary blade 2 . With this, the rotary blade 2 is clamped between the inner flange 11 and the intermediate flange 12 with a large force, whereby the rotary blade 2 is prevented from being slipped relative to the inner flange 11 .
  • the fixing device 10 has a function of converting the rotational resistance imparted to the rotary blade 2 into a force for clamping the rotary blade 2 between the inner flange 11 and the intermediate flange 12 (clamping force).
  • clamping force a force for clamping the rotary blade 2 between the inner flange 11 and the intermediate flange 12
  • the fixing device 10 can be used more conveniently.
  • the function of converting the rotational resistance imparted to the rotary blade 2 into the clamping force (axial force P) for the rotary blade 2 is structurally realized by a slight displacement of the intermediate flange 12 relative to the outer flange 13 in the direction of the axis J.
  • Compactification in the radial direction can be easily achieved in comparison with conventional structures in which a ratchet mechanism for engaging and disengaging meshing of teeth with recessed portions on the outer peripheral side by displacing claw portions in the radial direction, or in which a speed reduction gear train is arranged in the radial direction.
  • the illustrated fixing device 10 can be applied to a portable circular saw without sacrificing the inclination angle of the rotary blade, the cutting depth of the rotary blade, and the like, at the time of performing oblique cutting.
  • cam portions 12 c of the intermediate flange 12 and the cam portions 13 d of the outer flange 13 are formed to be a triangular shape, and hence the rotational resistance in any direction of the intermediate flange 12 relative to the outer flange 13 (displacement in rotational direction) is also converted into the axial force P in the direction of the axis J of the intermediate flange 12 (pressing force against rotary blade 2 ).
  • FIGS. 7 to 12 illustrate second to sixth embodiments.
  • FIG. 7 illustrates a fixing device 20 according to the second embodiment.
  • the fixing device 20 according to the second embodiment is different from the first embodiment mainly in the structure of an inner flange 21 .
  • the inner flange 21 according to the second embodiment has a boss portion 21 a provided at the center thereof.
  • the boss portion 21 a protrudes toward the rotary blade 2 (right side in FIG. 7 ).
  • the boss portion 21 a is inserted in the attachment hole 2 a of the rotary blade 2 in a state of being relatively rotatable without backlash.
  • a through-hole 21 b having a two surface width sufficiently larger than the two surface width of the rotation fixing portion S in size.
  • a disk-shaped slipping flange 22 Between the inner flange 21 and the rotary blade 2 , there is clamped a disk-shaped slipping flange 22 . As illustrated in the figure, the boss portion 21 a of the inner flange 21 is inserted into the central hole of the slipping flange 22 . Further, the peripheral portion of the slipping flange 22 is folded back toward the inner flange 21 . A folded-back end portion 22 a thus formed is engaged with an engagement groove portion 21 c provided in the peripheral surface of the inner flange 21 .
  • the slipping flange 22 is mounted in a state of covering substantially the entire surface on the rotary blade 2 side of the inner flange 21 and in a state of being relatively rotatable about the axis J of the spindle 1 and being not to be detach in the direction of the axis J.
  • the slipping flange 22 corresponds to an example of the friction reducing means described in claims. Meanwhile, similarly to the first embodiment, an intermediate flange 23 is in contact with the side surface on the opposite side of the rotary blade 2 with large frictional resistance.
  • the intermediate flange 23 is different from the intermediate flange 12 according to the first embodiment in that a central attachment hole 23 a thereof is formed as a two surface width hole.
  • the attachment hole 23 a of the intermediate flange 23 is formed to have the same diameter and the same dimension of the two surface width as those of the through-hole 21 b of the inner flange 21 .
  • the intermediate flange 23 is mounted to the rotation fixing portion S in a rotatable state within a predetermined angular range.
  • the relatively rotatable angle of the intermediate flange 23 and the inner flange 21 to the rotation fixing portion S is set to an angle corresponding to the relative rotation of the cam meshing portion at which an axial force sufficient for reliably fixing the rotary blade 2 can be produced.
  • the through-holes of the inner flange 21 and the intermediate flange 23 may be formed not as two surface width holes but as normal circular holes so as not to be restricted in the rotational direction relative to the rotation fixing portion S.
  • the intermediate flange 23 is provided with the cam portions 12 c to 12 c, and the cam portions 13 d to 13 d of the outer flange 13 mesh with the cam portions 12 c to 12 c.
  • the fixing thread portion 14 a of the fixing flange 14 is tightened into the threaded hole 1 b of the spindle 1 so that the rotary blade 2 is clamped between the inner flange 21 and the intermediate flange 23 .
  • the cam portions 12 c to 12 c of the intermediate flange 23 and the cam portions 13 d to 13 d of the outer flange 13 mesh with each other with a tightening force (axial force P) of the fixing thread portion 14 a.
  • the through-hole 13 a having a two surface width (oval shape).
  • the rotation fixing portion S is inserted into the through-hole 13 a without a play in the rotational direction thereof.
  • the outer flange 13 is mounted to the rotation fixing portion S in a state of being relatively non-rotatable.
  • the cutting resistance acts as a relative rotational force between the intermediate flange 23 and the outer flange 13 .
  • the relative rotational force acts as the axial force P on the rotary blade 2 through the meshing operation between the cam portions 12 c and 13 d, and the rotary blade 2 is firmly clamped between the inner flange 21 and the intermediate flange 23 with the axial force P.
  • rotational torque of the spindle 1 is efficiently transmitted to the rotary blade 2 .
  • the slipping flange 22 is clamped between the inner flange 21 and the rotary blade 2 .
  • the rotation of the rotary blade 2 and the intermediate flange 23 more easily occurs relative to the inner flange 21 , and eventually, the rotation fixing portion S.
  • the cam portions 12 c and 13 d are more easily loosened, whereby the tightening force of the fixing thread portion 14 a is more reliably reduced.
  • the inner flange 21 is mounted to the rotation fixing portion S of the spindle 1 in a rotatable state within a predetermined angular range.
  • the cam portions 12 c and 13 d are more easily loosened in comparison with the first embodiment, and eventually, the fixing flange 14 is more easily rotated in the loosening direction with a smaller force.
  • FIG. 8 illustrates a fixing device 30 according to the third embodiment, in which a further modification is added to the second embodiment.
  • the fixing device 30 according to the third embodiment is different from the fixing device 20 according to the second embodiment in that a cover 35 made of elastic rubber is mounted around an intermediate flange 31 , an outer flange 32 , and a fixing flange 33 .
  • a cover 35 made of elastic rubber is mounted around an intermediate flange 31 , an outer flange 32 , and a fixing flange 33 .
  • the cover 35 has a substantially conical tubular shape having a diameter reducing toward the fixing flange 33 , and three engagement protruding portions 35 a, 35 b, and 35 c are respectively formed correspondingly to the engagement groove portions 31 a, 32 a, and 33 a on the entire inner peripheral surface thereof.
  • the engagement protruding portion 35 a on the largest diameter side is fitted along the engagement groove portion 31 a of the intermediate flange 31
  • the engagement protruding portion 35 c on the smallest diameter side is fitted along the engagement groove portion 33 a of the fixing flange 33
  • the engagement protruding portion 35 b provided therebetween is fitted along the engagement groove portion 32 a of the outer flange 32 .
  • Each of the widths of the engagement protruding portions 35 a, 35 b, and 35 c, and each of the widths of the engagement groove portions 31 a, 32 a, and 33 a are dimensioned for allowing the engagement protruding portions 35 a, 35 b, and 35 c to be elastically deformed in the width directions thereof and pressed into the engagement groove portions 31 a, 32 a, and 33 a, respectively.
  • the relative rotation between the intermediate flange 31 , the outer flange 32 , and the fixing flange 33 is performed by elastic deformation of the cover 35 in the rotational direction.
  • the flanges 31 , 32 , and 33 are mutually maintained in a predetermined positional relation by the cover 35 .
  • the predetermined position is set to be a position (initial position) at which the cam portions 12 c of the intermediate flange 31 and the cam portions 13 d of the outer flange 32 mesh most deeply with each other.
  • the cam portions 12 c to 12 c of the intermediate flange 31 and the cam portions 13 d to 13 d of the outer flange 32 mesh with each other.
  • the engagement between both the cam portions 12 c and 13 d is biased toward the initial position where they mesh most deeply with each other (position at which intermediate flange 31 and outer flange 32 are brought to be closest to each other in the direction of axis J) by an elastic force in the rotational direction of the cover 35 .
  • a through-hole 31 b of a hole shape having a two surface width similar to the intermediate flange 23 according to the second embodiment.
  • the rotation fixing portion S of the spindle 1 is passed through the through-hole 31 b.
  • the intermediate flange 31 is mounted in a rotatable state within a predetermined angular range in a rotational direction thereof similarly to the inner flange 21 .
  • the cam portions 12 c of the intermediate flange 31 and the cam portions 13 d of the outer flange 32 are biased in the direction of meshing most deeply with each other.
  • the engagement between the cam portions 12 c and 13 d is instantly and reliably transferred to an initial state, in which the engagement becomes most deeply by the elastic force of the cover 35 .
  • the clamping force of the inner flange 21 and the intermediate flange 31 against the rotary blade 2 is released, and the tightening force of the fixing thread portion 14 a is reduced.
  • the cover 35 covers the periphery around between the intermediate flange 31 , the outer flange 32 , and the fixing flange 33 . Therefore, intrusion of foreign matters into between the flanges 31 , 32 , and 33 is prevented in advance.
  • the third embodiment there is illustrated a structure in which the intermediate flange 31 , the outer flange 32 , and the fixing flange 33 are engaged with each other in the rotational direction by means of the single cover 35 , and the cover 35 covers the periphery thereof.
  • separate covers may elastically bias in the rotational direction between the intermediate flange 31 and the outer flange 32 and between the outer flange 32 and the fixing flange 33 and may cover the peripheries thereof.
  • the flanges 31 , 32 , and 33 may be resiliently biased in the rotational direction to each other by, for example, torsion coil springs interposed therebetween.
  • the cam portions 12 c and 13 d can be biased in the direction of meshing most deeply with each other, and hence the same operations and effects as those described above can be obtained, although the foreign matter intrusion preventing function may be lowered. Accordingly, the cover may be omitted between the outer flange 32 and the fixing flange 33 .
  • FIG. 9 illustrates a fixing device 40 according to the fourth embodiment.
  • the fixing device 40 according to the fourth embodiment is different from the fixing device 20 of the second embodiment in that the positions of the cam meshing portion (cam portions 12 c to 12 c and 13 d to 13 d ) and the slipping flange 22 are changed to be reversed with respect to the rotary blade 2 .
  • the fixing device 40 according to the fourth embodiment corresponds to the embodiment of the invention described in claim 8 .
  • the same reference symbols are used, and the description thereof is omitted.
  • an inner flange 41 and an intermediate flange 42 are arranged on the left side in the figure relative to the rotary blade 2 (base portion side of spindle 1 ), and an outer flange 43 and the fixing flange 14 are arrange on the right side in the figure (leading end side of the spindle 1 ).
  • Cam portions 41 a to 41 a are provided on the side surface on the rotary blade 2 side of the inner flange 41 , and cam portions 42 a to 42 a are provided on the side surface opposite to the rotary blade 2 side of the intermediate flange 42 . Both the cam portions 41 a to 41 a and 42 a to 42 a are in mesh with each other.
  • a through-hole 41 b having a two surface width is provided at the center of the inner flange 41 .
  • the rotation fixing portion S of the spindle 1 is inserted into the through-hole 41 b.
  • the inner flange 41 is non-rotatably mounted to the spindle 1 .
  • the flanges on the side of being paired with the intermediate flanges for constituting the cam meshing portions are non-rotatably mounted to the rotation fixing portion S.
  • a boss portion 42 b At the center of the intermediate flange 42 , there is provided a boss portion 42 b.
  • the boss portion 42 b is inserted in the attachment hole 2 a of the rotary blade 2 without backlash in the radial direction, whereby the rotary blade 2 is held in contact with the side surface of the intermediate flange 42 .
  • On the inner peripheral side of the boss portion 42 b there is provided a through-hole 42 c having a two surface width correspondingly to the rotation fixing portion S of the spindle 1 .
  • the through-hole 42 c is dimensioned for allowing the intermediate flange 42 to rotate relative to the rotation fixing portion S of the spindle 1 within a predetermined angular range.
  • the inner flange 41 and the intermediate flange 42 are allowed to be relatively rotated about the axis J, while the displacement in the direction of the axis J is restricted within a predetermined range, whereby the detachment thereof is prevented.
  • the outer flange 43 is in contact with the rotary blade 2 while a slipping flange 45 made of a material having small frictional resistance is clamped between the outer flange 43 and the rotary blade 2 .
  • the slipping flange 45 also corresponds to an example of the friction reducing means described in claims.
  • a through-hole 45 b having a circular shape of the same diameter as that of the attachment hole 2 a of the rotary blade 2 .
  • the rotation fixing portion S of the spindle 1 is passed through the through-hole 45 b.
  • the outer peripheral side of the slipping flange 45 is folded back similarly to the second embodiment, and a folded-back portion 45 a thus formed is inserted into an engagement groove 43 b provided over the entire outer peripheral surface of the outer flange 43 .
  • the slipping flange 45 is mounted not to be displaceable in the direction of the axis J and to be relatively rotatable about the axis J in a state of covering substantially the entire side surface of the outer flange 43 .
  • a through-hole 43 a having a two surface width.
  • the rotation fixing portion S of the spindle 1 is passed through the through-hole 43 a.
  • the through-hole 43 a is dimensioned to have a two surface width for allowing the outer flange 43 to be rotated within a predetermined range in the rotational direction relative to the rotation fixing portion S.
  • the same operations and effects as those in the above-mentioned embodiments can also be obtained.
  • the rotary blade 2 When a user lightly tightens the fixing flange 14 , the rotary blade 2 is clamped between the intermediate flange 42 and the outer flange 43 owing to a tightening force of the fixing thread portion 14 a.
  • the meshing between the cam portions 41 a and 42 a becomes shallower, and a clamping force of the intermediate flange 42 and the outer flange 43 is increased.
  • the rotary blade 2 is firmly fixed to the rotation fixing portion S in a state of being non-rotatable and immovable in the axial direction.
  • FIG. 10 illustrates a fixing device 50 according to the fifth embodiment, which is a combination of the second embodiment and the fourth embodiment.
  • the fixing device 50 according to the fifth embodiment is different from the first to fourth embodiments in that the cam meshing portions are provided on both sides with respect to the rotary blade 2 . That is, while one set of the cam portions is provided in the first to fourth embodiments, two sets of cam portions are provided in the fifth embodiment.
  • the fixing device 50 according to the fifth embodiment corresponds to the embodiment of the invention described in claim 9 . For parts and structures similar to those in the first to fourth embodiments, the same reference symbols are used, and the description thereof is omitted.
  • the fixing device 50 includes an inner flange 51 , an inner intermediate flange 52 , an outer intermediate flange 53 , an outer flange 54 and the fixing flange 14 in the order from the left side in FIG. 10 .
  • a combination of the inner flange 41 and the intermediate flange 42 in the fourth embodiment is used, and on the right side in the figure with respect to the rotary blade 2 , a combination of the intermediate flange 23 and the outer flange 13 in the second embodiment is used.
  • the slipping flange 22 is not used in the case of the fifth embodiment.
  • Through-holes 51 b and 54 b each having a two surface width there are provided through-holes 51 b and 54 b each having a two surface width, and the rotation fixing portion S of the spindle 1 is passed on their inner peripheral sides in a state of being relatively non-rotatable.
  • through-holes 52 b and 53 b each having a two surface width.
  • each of the two surface widths of both the through-holes 52 b and 53 b is dimensioned for allowing relative rotation of both the intermediate flanges 52 and 53 within a predetermined angular range in the rotational direction relative to the rotation fixing portion S of the spindle 1 .
  • a boss portion 52 c is provided at the center of the inner intermediate flange 52 .
  • the through-hole 52 b is provided on the inner peripheral side of the boss portion 52 c.
  • the boss portion 52 c is inserted into the attachment hole 2 a of the rotary blade 2 without backlash in the radial direction.
  • the inner flange 51 and the inner intermediate flange 52 are combined with each other without backlash in the direction of the axis J while being relatively rotatable about the axis J.
  • the outer intermediate flange 53 and the outer flange 54 are combined with each other, and by way of the retaining ring 16 , the outer flange 54 and the fixing flange 14 are combined with each other, in either case, without backlash in the direction of the axis J while being relatively rotatable about the axis J.
  • the fixing device 50 according to the fifth embodiment which is provided with two sets of the cam meshing portions, when the cutting resistance is no longer imparted to the rotary blade 2 , relative rotational forces are no longer imparted between the inner flange 51 and the inner intermediate flange 52 and between the outer intermediate flange 53 and the outer flange 54 .
  • the meshing of the cam portions on both the sides of the rotary blade 2 becomes most deeply so that the tightening force of the fixing thread portion 14 a is instantly weakened. Accordingly, it is possible to rotationally manipulate the fixing flange 14 in a loosening direction with a small force.
  • the fixing device 50 can be used more conveniently.
  • FIGS. 11 and 12 illustrate a fixing device 60 according to the sixth embodiment.
  • the fixing device 60 is constructed to interpose two plate springs 61 and 62 between the intermediate flange 23 and the outer flange 13 in the fixing device 20 according to the second embodiment.
  • the same reference symbols are used, and the description thereof is omitted.
  • a through-hole 63 a formed to have a two surface width for allowing the intermediate flange 63 to be rotated within a predetermined angular range in the rotational direction relative to the rotation fixing portion S of the spindle 1 .
  • the rotation fixing portion S of the spindle 1 is passed through the through-hole 63 a.
  • semicircular spring accommodating portions 63 b and 63 c are provided in two areas on the periphery of the through-hole 63 a.
  • Both the spring accommodating portions 63 b and 63 c are formed in the side surface on the fixing flange 14 side to have small depths in the thickness direction of the intermediate flange 63 (direction of axis J).
  • the plate springs 61 and 62 are accommodated in the spring accommodating portions 63 b and 63 c, respectively.
  • Both the plate springs 61 and 62 are small pieces having band plate shapes and are bent at both end portions thereof. Respective bent end portions 61 a, 61 a, 62 a, and 62 a of the plate springs 61 and 62 are resiliently engaged with larger diameter side surfaces of the spring accommodating portions 63 b and 63 c, and are retained in such a state that both the plate springs 61 and 62 are shored. Thus, both the plate springs 61 and 62 are fixed so as not to shift about the axis J or in the radial direction. Both centers with respect to the longitudinal directions of the plate springs 61 and 62 are in contact with flat surfaces 1 a of the rotation fixing portion S of the spindle 1 , respectively.
  • the interval between both the plate springs 61 and 62 substantially corresponds to the surface width between the two flat surfaces 1 a and 1 a of the spindle 1 .
  • an intermediate flange 63 is biased to be restored to a predetermined position (position at which both plate springs 61 and 62 are in contact with the flat surfaces 1 a of the rotation fixing portion S of spindle 1 , that is, a position illustrated in FIG. 12 , hereinafter refereed to as initial position) about the axis J of the spindle 1 (in a rotational direction).
  • the positional relation between both the plate springs 61 and 62 and the flat surface 1 a of the rotation fixing portion S is properly set such that cam portions 63 d to 63 d of the intermediate flange 63 and cam portions 64 a to 64 a of an outer flange 64 mesh most deeply with each other in a state in which the intermediate flange 63 is restored to the initial position with the biasing forces of both the plate springs 61 and 62 .
  • the outer flange 64 has a through-hole 64 b provided at the center thereof and formed as a hole having a two surface width, and hence is mounted to the rotation fixing portion S in a state of being fixed with respect to the rotation.
  • the intermediate flange 63 is biased by the plate springs 61 and 62 to the initial position at which the cam portions 63 d and 64 a mesh most deeply with each other.
  • the intermediate flange 63 is reliably and instantly restored to the initial position by the biasing forces of both the plate springs 61 and 62 .
  • the slipping flange 22 is clamped between the inner flange 21 and the rotary blade 2 , and the inner flange 21 is mounted to the rotation fixing portion S of the spindle 1 with a suitable play in the rotational direction.
  • the rotation of the rotary blade 2 and the intermediate flange 63 relative to the inner flange 21 is caused more easily.
  • the rotational manipulation in the loosening direction of the fixing flange 14 can be more easily performed.
  • liners with high slide ability are attached to the cam portions 12 c to 12 and the cam portions 13 d to 13 d or a lubricant is applied thereto so as to lower sliding resistance thereof, and a slip-preventing member is attached to the contact surface 12 b of the intermediate flange 12 so that a suitable difference is obtained between the sliding resistance between the cam portions 12 c and 13 d and the frictional resistance of the intermediate flange 12 against the rotary blade 2 .
  • the contact area of the contact surface 12 a of the intermediate flange 12 with the rotary blade 2 may be increased, whereby the frictional resistance thereof can be set to be larger than the sliding resistance between the cam portions 12 c and 13 d.
  • the contact surface 12 b of the intermediate flange 12 with the rotary blade 2 is positioned on the outer peripheral side of the sliding-contact portion between the cam portions 12 c and 13 d, and hence large frictional resistance can be easily obtained for the former.
  • the threaded hole 1 b is provided at the leading end of the spindle 1 and the fixing thread portion 14 a is provided to the fixing flange 14 .
  • a threaded shaft portion is provided on the spindle 1 side and a female thread portion (nut portion) is provided on the fixing flange 14 side, so that they are threadably coupled to each others.
  • the slipping flange 22 is used as the friction reducing means for reducing the frictional resistance in the rotational direction of the inner flange 21 against the rotary blade 2 in comparison with the frictional resistance in the rotational directions of the intermediate flanges 23 , 31 , and 63 against the rotary blade 2 .
  • a lubricant such as molybdenum grease is further applied onto one or both of the surfaces of the slipping flange 22 , or a surface layer with high slide ability is coated by plating or the like on one or both of the inner flange 21 and the rotary blade 2 , whereby the frictional resistance in the rotational direction of the inner flange 21 against the rotary blade 2 is reduced.
  • the flanges on the side of not constituting the cam meshing portions by being paired with the intermediate flanges can be constructed to be relatively rotatable to the rotation fixing portion S at least within a predetermined angular range, whereby a relative displacement in the cam meshing portion can be further facilitated.
  • the rotation within a predetermined angular range can be obtained not only in the structure in which the though-hole allowing the rotation fixing portion S to pass therethrough is formed as a circular hole, but also by loosening the restriction in the rotational direction (enlarging a two surface width) even in the case of a through-hole having a two surface width.
  • the intermediate flange is not fixed to the rotation fixing portion S with respect to the rotation.
  • the flange paired with the intermediate flange for constituting the cam meshing portion is fixed to the rotation fixing portion S with respect to the rotation.
  • the flange which does not constitute the cam meshing portion by being paired with the intermediate flange is not fixed to the rotation fixing portion S with respect to the rotation.
  • the third structure in is possible to incorporate a structure in which the through-hole is formed as a circular hole, and consequently there is no restriction in the rotational direction unless the rotation is fixed by the rotation fixing portion S, or a structure in which, the through-hole is formed as a hole having a two surface width but the two surface width is loose enough in comparison with the two surface width dimension of the rotation fixing portion S, and consequently there is a play within a predetermined range in the rotational direction.
  • the two surface width portion S is illustrated as a rotation fixing portion, alternatively, a shaft portion rectangular in cross-section or hexagonal in cross-section may be incorporated as the rotation fixing portion.
  • the sixth embodiment there is illustrated the structure in which, regarding the position in the rotational direction of the intermediate flange 63 relative to the rotation fixing portion S, the two plate springs 61 and 62 are used as the initial position biasing means for biasing toward the initial position at which the cam portions 63 d to 63 d of the intermediate flange 63 and the cam portions 64 a to 64 a of the outer flange 64 most deeply mesh with each other.
  • coil springs such as compression springs, tension springs, or torsion springs or other biasing means are used.
  • the fixing device may be similarly applied in the case of attaching the rotary blade to spindles of other rotary tools such as a bench type or installation type circular sawing machine, a grinder, or a polishing instrument.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Gripping On Spindles (AREA)
  • Sawing (AREA)
US12/448,814 2007-01-09 2007-12-19 Fixing device for rotary blade Abandoned US20100040474A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007001247 2007-01-09
JP2007-001247 2007-01-09
PCT/JP2007/074419 WO2008084636A1 (fr) 2007-01-09 2007-12-19 Dispositif de fixation pour outil à lame tournante

Publications (1)

Publication Number Publication Date
US20100040474A1 true US20100040474A1 (en) 2010-02-18

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ID=39608533

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Application Number Title Priority Date Filing Date
US12/448,814 Abandoned US20100040474A1 (en) 2007-01-09 2007-12-19 Fixing device for rotary blade

Country Status (4)

Country Link
US (1) US20100040474A1 (fr)
EP (1) EP2123380A4 (fr)
JP (1) JP5275044B2 (fr)
WO (1) WO2008084636A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013074735A1 (fr) * 2011-11-17 2013-05-23 Black & Decker Inc. Accessoires pour faire osciller des outils électriques
US20140327215A1 (en) * 2013-05-06 2014-11-06 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US20150209975A1 (en) * 2014-01-30 2015-07-30 Makita Corporation Cutting devices
US20180029190A1 (en) * 2016-07-27 2018-02-01 Robert Bosch Tool Corporation Accessory System for a Power Tool
CN109396561A (zh) * 2018-12-11 2019-03-01 江西江钨硬质合金有限公司 一种m类不锈钢车削刀片生产用切割刀片
DE102019206810A1 (de) 2018-05-31 2019-12-05 Bosch Limited Eine Halteanordnung für ein Kreissägewerkzeug
CN110842718A (zh) * 2019-11-21 2020-02-28 颀谱电子科技(南通)有限公司 一种集成电路板生产的快拆式防放置偏移磨具
CN111278601A (zh) * 2017-10-27 2020-06-12 喜利得股份公司 夹紧装置和手持式工具机
US11103973B2 (en) * 2016-02-02 2021-08-31 Hilti Aktiengesellschaft Clamping device
US20230045014A1 (en) * 2021-08-03 2023-02-09 Disco Corporation Cutting apparatus
US20230103522A1 (en) * 2020-02-25 2023-04-06 Brokk Aktiebolag Demolition robot

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5528100B2 (ja) * 2009-12-28 2014-06-25 京セラ株式会社 裏面フライス用コンバーター
DE102010043190A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Handwerkzeugmaschinenspannvorrichtung
DE102010043186A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Handwerkzeugmaschinenspannvorrichtung
DE102010043187A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Handwerkzeugmaschinenspannvorrichtung
IT1402777B1 (it) * 2010-11-17 2013-09-18 Ferrari & Cigarini S R L Apparecchiatura per l'accoppiamento di un utensile rotante al relativo mandrino
JP2012200794A (ja) * 2011-03-23 2012-10-22 Makita Corp 電動工具
JP6163967B2 (ja) * 2013-08-26 2017-07-19 日立工機株式会社 動力工具および先端工具の固定構造
JP6855117B2 (ja) * 2017-03-06 2021-04-07 株式会社ディスコ フランジ機構
US20200070266A1 (en) * 2018-08-29 2020-03-05 Illinois Tool Works Inc. Retention apparatus for material removal machines
JP7446067B2 (ja) * 2019-08-22 2024-03-08 株式会社ディスコ フランジ機構
DE102020201737A1 (de) * 2020-02-12 2021-08-12 Robert Bosch Gesellschaft mit beschränkter Haftung Adaptervorrichtung und Werkzeugmaschinensystem mit der Adaptervorrichtung
EP4171906B1 (fr) * 2020-06-25 2025-04-02 Festool GmbH Scie circulaire avec support de lame pour lame de scie circulaire et procede de fixation d'une lame de scie circulaire sur une scie circulaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955744A (en) * 1987-01-15 1990-09-11 Robert Bosch Gmbh Clamping fixture for axially clamping a tool in place, in particular a disc
US5899648A (en) * 1996-12-05 1999-05-04 Power Tool Holders Incorporated Ball screw clamping device
US6454639B1 (en) * 1998-11-10 2002-09-24 Tyrolit Schleifmittelwerke Swarovski Kg Clamping device for grinding discs
US20030136010A1 (en) * 2001-12-12 2003-07-24 S-B Power Tool Corporation Wrenchless blade clamp assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6909435U (de) * 1969-03-07 1969-07-10 Metabowerke Kg Aufspannvorrichtung fuer das saegeblatt bei einer kreissaege
JP3599997B2 (ja) * 1998-02-12 2004-12-08 株式会社マキタ 回転刃具の取付け構造
JP4029512B2 (ja) * 1999-02-17 2008-01-09 日本精工株式会社 研削工具
JP2001096407A (ja) 1999-09-28 2001-04-10 Makita Corp 切断機の工具レスフランジ
JP4194235B2 (ja) * 2000-09-27 2008-12-10 株式会社ジェイテクト 砥石車
JP2001150208A (ja) * 2000-09-28 2001-06-05 Makita Corp 回転工具の刃具固定装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955744A (en) * 1987-01-15 1990-09-11 Robert Bosch Gmbh Clamping fixture for axially clamping a tool in place, in particular a disc
US5899648A (en) * 1996-12-05 1999-05-04 Power Tool Holders Incorporated Ball screw clamping device
US6454639B1 (en) * 1998-11-10 2002-09-24 Tyrolit Schleifmittelwerke Swarovski Kg Clamping device for grinding discs
US20030136010A1 (en) * 2001-12-12 2003-07-24 S-B Power Tool Corporation Wrenchless blade clamp assembly

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013074735A1 (fr) * 2011-11-17 2013-05-23 Black & Decker Inc. Accessoires pour faire osciller des outils électriques
US10940605B2 (en) 2013-05-06 2021-03-09 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US20140327215A1 (en) * 2013-05-06 2014-11-06 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US9555554B2 (en) * 2013-05-06 2017-01-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US12179378B2 (en) 2013-05-06 2024-12-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US10137592B2 (en) 2013-05-06 2018-11-27 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US11724413B2 (en) 2013-05-06 2023-08-15 Milwaukee Electric Tool Corporation Oscillating multi-tool system
US20150209975A1 (en) * 2014-01-30 2015-07-30 Makita Corporation Cutting devices
US9789624B2 (en) * 2014-01-30 2017-10-17 Makita Corporation Cutting devices
US11103973B2 (en) * 2016-02-02 2021-08-31 Hilti Aktiengesellschaft Clamping device
US20180029190A1 (en) * 2016-07-27 2018-02-01 Robert Bosch Tool Corporation Accessory System for a Power Tool
US10076832B2 (en) * 2016-07-27 2018-09-18 Robert Bosch Tool Corporation Accessory system for a power tool
CN111278601A (zh) * 2017-10-27 2020-06-12 喜利得股份公司 夹紧装置和手持式工具机
US20200324385A1 (en) * 2017-10-27 2020-10-15 Hilti Aktiengesellschaft Clamping device and hand-held power tool
US12011802B2 (en) * 2017-10-27 2024-06-18 Hilti Aktiengesellschaft Clamping device and hand-held power tool
US11014260B2 (en) 2018-05-31 2021-05-25 Robert Bosch Gmbh Holder assembly for a circular saw tool
DE102019206810A1 (de) 2018-05-31 2019-12-05 Bosch Limited Eine Halteanordnung für ein Kreissägewerkzeug
CN109396561A (zh) * 2018-12-11 2019-03-01 江西江钨硬质合金有限公司 一种m类不锈钢车削刀片生产用切割刀片
CN110842718A (zh) * 2019-11-21 2020-02-28 颀谱电子科技(南通)有限公司 一种集成电路板生产的快拆式防放置偏移磨具
US20230103522A1 (en) * 2020-02-25 2023-04-06 Brokk Aktiebolag Demolition robot
US12208533B2 (en) * 2020-02-25 2025-01-28 Brokk Aktiebolag Demolition robot
US20230045014A1 (en) * 2021-08-03 2023-02-09 Disco Corporation Cutting apparatus

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JPWO2008084636A1 (ja) 2010-04-30
EP2123380A4 (fr) 2011-10-12
WO2008084636A1 (fr) 2008-07-17
JP5275044B2 (ja) 2013-08-28
EP2123380A1 (fr) 2009-11-25

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