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WO2025210779A1 - Boîtier, stator, moteur électrique et élément fixé - Google Patents

Boîtier, stator, moteur électrique et élément fixé

Info

Publication number
WO2025210779A1
WO2025210779A1 PCT/JP2024/013775 JP2024013775W WO2025210779A1 WO 2025210779 A1 WO2025210779 A1 WO 2025210779A1 JP 2024013775 W JP2024013775 W JP 2024013775W WO 2025210779 A1 WO2025210779 A1 WO 2025210779A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
screw member
fastened
convex portion
protrusion
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.)
Pending
Application number
PCT/JP2024/013775
Other languages
English (en)
Japanese (ja)
Inventor
林真
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.)
Fanuc Corp
Original Assignee
Fanuc 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 Fanuc Corp filed Critical Fanuc Corp
Priority to PCT/JP2024/013775 priority Critical patent/WO2025210779A1/fr
Publication of WO2025210779A1 publication Critical patent/WO2025210779A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus

Definitions

  • This disclosure relates to a housing, a stator, an electric motor, and a fastened member.
  • a first aspect of the present disclosure is a housing provided in a stator of an electric motor, comprising a fastening portion having an opening into which the shank of a screw member is inserted, and a protrusion that protrudes from the fastening portion and bites into the seating surface of the screw member when the screw member is fastened.
  • a second aspect of the present disclosure is a stator comprising a housing according to the first aspect of the present disclosure.
  • a third aspect of the present disclosure is an electric motor equipped with a stator according to the second aspect of the present disclosure.
  • a fourth aspect of the present disclosure is a fastened member that is fastened using a screw member, and that includes a fastened portion formed with an opening into which the shank of the screw member is inserted, and a protrusion that protrudes from the fastened portion and bites into the seating surface of the screw member when the screw member is fastened.
  • FIG. 1A is a schematic diagram illustrating a portion of an electric motor according to an embodiment
  • FIG. 1B is an enlarged view of a portion of FIG. 1A
  • 2A is a plan view of the housing
  • FIG. 2B is an enlarged view of a portion of FIG. 2A
  • Fig. 3A is a perspective view showing one of a plurality of fastened portions provided on a fastened member
  • Fig. 3B is an enlarged view of a portion of Fig. 3A
  • Fig. 3C is a cross-sectional view of the protrusion shown in Fig. 3A
  • FIG. 4 is a perspective view of a protrusion according to the first modification
  • FIG. 5 is a perspective view of a protrusion according to the second modification
  • FIG. 6 is a perspective view of a protrusion according to the third modification.
  • Prior art including that disclosed in JP 60-096147 A, has at least the following problem. Specifically, providing a screw member with a special structure to prevent loosening increases the unit price of the screw member. As a result, this increases the unit price of a product that includes the screw member and the fastened components that are fastened using the screw member.
  • Fig. 1A is a schematic diagram showing a portion of an electric motor 10 according to one embodiment.
  • Fig. 1A shows a stator 12 provided in the electric motor 10.
  • Fig. 1B is a partially enlarged view of Fig. 1A.
  • Fig. 1B shows a portion surrounded by a box IB in Fig. 1A.
  • Fig. 2A is a plan view of a housing 18.
  • Fig. 2A shows a first housing 181 as viewed in the axial direction of the electric motor 10.
  • Fig. 2B is a partially enlarged view of Fig. 2A.
  • Fig. 2B shows a portion surrounded by a box IIB in Fig. 2A.
  • the stator 12 includes a stator core 14, a coil portion 16, and multiple housings 18.
  • the stator core 14 is a cylindrical (annular) member provided in the electric motor 10.
  • the stator core 14 comprises, for example, multiple electromagnetic steel plates stacked along the axial direction DS of the electric motor 10.
  • the rotor and shaft of the electric motor 10 are arranged inside the stator core 14.
  • the extension direction of the shaft coincides with the axial direction DS of the electric motor 10. Note that the electromagnetic steel plates, rotor, and shaft are not shown in the figures.
  • the stator core 14 has two ends in the axial direction DS (axial ends 14t) and a side portion 14s facing in a direction perpendicular to the axial direction DS.
  • the two axial ends 14t include a first axial end 14t1, which is one of the axial ends 14t in the axial direction DS, and a second axial end 14t2, which is the other axial end 14t in the axial direction DS.
  • the side portion 14s faces radially outward from the shaft (not shown) described above.
  • the coil portion 16 is arranged in a ring shape so as to surround the rotor described above.
  • the coil portion 16 is inserted into a slot formed in the stator core 14, for example.
  • the coil portion 16 is formed from a conducting wire.
  • Each of the multiple housings 18 is a member that covers at least a portion of the stator core 14. By covering at least a portion of the stator core 14, the multiple housings 18 further cover the coil portion 16 provided on the stator core 14.
  • the multiple housings 18 may selectively cover the axial end 14t of the stator core 14 or the side portion 14s of the stator core 14. In other words, at least one of the multiple housings 18 may cover the axial end 14t without covering the side portion 14s.
  • the multiple housings 18 may include a first housing 181 and a second housing 182.
  • the first housing 181 is a housing 18 that covers the first axial end 14t1 of the stator core 14 while exposing the side portion 14s.
  • the second housing 182 is a housing 18 that covers the second axial end 14t2 of the stator core 14 while exposing the side portion 14s.
  • one of the first housing 181 and the second housing 182 may have an opening through which the above-mentioned shaft (not shown) is inserted.
  • the first housing 181 is a fastened member 22 that is fastened using a screw member 20.
  • the first housing 181, which is the fastened member 22, has a fastened portion 24 and a protrusion 26, which will be described below.
  • the hole 22h is a through-hole that penetrates the first housing 181 along the axial direction DS.
  • the through-hole is a through-hole. That is, the diameter of the hole 22h is large enough to allow the shank 20b of the screw member 20 to pass through.
  • the shape of the hole 22h (opening 28) in plan view is not limited to a circular shape.
  • the screw member 20 is inserted through the first housing 181 via the opening 28 formed in the fastening portion 24.
  • the screw member 20 inserted through the first housing 181 threads into a threaded hole (female thread) 182h formed in the second housing 182.
  • the screw member 20 inserted through the first housing 181 threads into the threaded hole 182h, thereby fixing the first housing 181 and the second housing 182 to the stator core 14.
  • the threaded hole 182h formed in the second housing 182 may have a bottom 182hb ( Figure 1A), but is not limited to this.
  • the male thread (thread) that threads into the threaded hole 182h is formed at least in a portion of the shaft portion 20b that can be inserted into the threaded hole 182h (the tip of the shaft portion 20b) ( Figure 1A).
  • the male thread may be formed along the entire shaft portion 20b.
  • the convex portion 26 is a portion that protrudes from the fastened portion 24.
  • the fastened member 22 first housing 181 may have multiple convex portions 26. However, in the following description, in order to avoid redundant explanation, focus will be primarily on one of the multiple convex portions 26 unless otherwise specified.
  • the protrusion 26 may be integrally molded with the fastened portion 24 (the fastened member 22). In this case, the protrusion 26 may be formed from the same material (aluminum, etc.) as the fastened portion 24 (the fastened member 22).
  • the protruding direction DP of the convex portion 26 intersects (is perpendicular to) the in-plane direction, which is a direction parallel to the abutment surface 24s of the fastened portion 24.
  • the protruding direction DP is along the out-of-plane direction, which is a direction perpendicular to the abutment surface 24s.
  • the abutment surface 24s is the surface of the fastened portion 24 that abuts against the seat surface 20s of the screw member 20.
  • the opening 28 described above is formed in the abutment surface 24s. Note that in this embodiment, the out-of-plane direction coincides with the axial direction DS of the electric motor 10.
  • the protrusion 26 is located within a range of the abutment surface 24s that can abut against the seat surface 20s of the screw member 20 when the screw member 20 is inserted into the opening 28. Therefore, the protrusion 26 can bite into the seat surface 20s of the screw member 20 when the screw member 20 is tightened.
  • the specific position of the protrusion 26 can be determined as appropriate, for example, based on the design of the screw member 20.
  • the amount of protrusion of the convex portion 26 gradually increases along the rotation direction DR of the screw member 20.
  • the rotation direction DR is the direction in which the screw member 20 rotates when fastened. In other words, the screw member 20 is rotated in the rotation direction DR to thread into the screw hole 182h.
  • FIG. 3A is a perspective view showing one of the multiple fastening portions 24 provided on the fastened member 22.
  • FIG. 3B is a partially enlarged view of FIG. 3A.
  • One of the multiple protrusions 26 shown in FIG. 3A is shown in FIG. 3B.
  • FIG. 3C is a cross-sectional view of the protrusion 26 shown in FIG. 3A.
  • a cross-section of the protrusion 26 along the rotation direction DR is shown in FIG. 3C. This cross-section is taken in the direction IIIC of FIG. 3A.
  • the convex portion 26 has multiple surfaces 26s.
  • the convex portion 26 has four surfaces 26s.
  • the number of surfaces 26s is determined according to the shape of the convex portion 26.
  • Each of the multiple surfaces 26s is inclined with respect to the out-of-plane direction (axial direction DS) described above. It is preferable that the multiple surfaces 26s of the convex portion 26 form an obtuse angle with the abutment surface 24s.
  • each of the multiple angles ⁇ shown in Figures 3B and 3C is an obtuse angle ( ⁇ > 90°).
  • the angle ⁇ is the angle formed between the surface 26s of the convex portion 26 and the abutment surface 24s.
  • the multiple surfaces 26s include a first surface 26s1 and a second surface 26s2.
  • the first surface 26s1 is a surface 26s that extends from the end 26t1 of the convex portion 26 in the direction opposite to the rotational direction DR to the protruding end 26p of the convex portion 26.
  • the first surface 26s1 extends along the in-plane direction of the abutment surface 24s.
  • the second surface 26s2 is a surface 26s that extends from the protruding end 26p of the convex portion 26 to the end 26t2 of the convex portion 26 in the rotational direction DR.
  • the second surface 26s2 is located in the rotational direction DR relative to the first surface 26s1 and extends along the out-of-plane direction.
  • the first angle ⁇ 1 and the second angle ⁇ 2 are shown in Figure 3C. It is preferable that the first angle ⁇ 1 be greater than the second angle ⁇ 2 ( ⁇ 1 > ⁇ 2). Note that the first angle ⁇ 1 is the angle ⁇ between the first surface 26s1 and the abutment surface 24s. In contrast, the second angle ⁇ 2 is the angle ⁇ between the second surface 26s2 and the abutment surface 24s.
  • the shape (planar shape) of the convex portion 26 in a plan view (axial view) along the protrusion direction DP may be triangular (see also Figure 2B). More specifically, this planar shape is the shape of the first surface 26s1 in a planar view. In this case, it is preferable that the planar shape is a triangle that gradually widens along the rotation direction DR. In other words, it is preferable that one vertex PA of the three vertices P included in the triangular shape coincides with the end 26t1 of the convex portion 26 in the opposite direction (described above), and that the remaining two vertices P (vertex PB, vertex PC) are located in the rotation direction DR relative to vertex PA.
  • the length of at least one of these three sides S differs from the lengths of the remaining two sides S (second sides).
  • the cross-sectional shape is preferably a scalene triangle or an isosceles triangle. It is more preferable that the cross-sectional shape is a scalene triangle.
  • the vertex PD shown in Figure 3C may be included in the protruding end 26p of the convex portion 26. In that case, the vertex PE may be included in the end 26t2 described above.
  • the first angle ⁇ 1 and second angle ⁇ 2 described above each correspond to the size of the exterior angle of the triangle defined by the three sides S. More specifically, the first angle ⁇ 1 corresponds to the size of the exterior angle tangent to the side S connecting vertices PD and PE, one of the three sides that define the shape of the cross section described above. In contrast, the second angle ⁇ 2 corresponds to the size of the exterior angle tangent to the side S connecting vertices PA and PD, one of the three sides that define the shape of the cross section described above.
  • Figure 3C also shows the maximum protrusion amount H of the convex portion 26 provided on the fastened member 22, which is the housing 18 of the stator 12.
  • the maximum protrusion amount H is preferably determined in advance based on the amount of thermal expansion dH.
  • the position in the protruding direction DP of the protruding end 26p of the convex portion 26 provided on the fastened member 22, which is the housing 18 of the stator 12 is preferably determined in advance based on the amount of thermal expansion dH.
  • Thermal expansion amount dH is the amount of expansion in the protruding direction DP of the convex portion 26 when the rated current is supplied to the stator 12 (electric motor 10).
  • the housing 18 can thermally expand in response to the supply of current to the electric motor 10. Based on this, when the fastened member 22 is the housing 18, it is preferable that the maximum protruding amount H of the convex portion 26 when no current is flowing through the electric motor 10 be determined based on the thermal expansion amount dH of the convex portion 26 when the rated current is supplied to the electric motor 10.
  • the maximum protrusion amount H of the convex portion 26 when no current is flowing through the electric motor 10 is greater than the thermal expansion amount dH of the convex portion 26 when the rated current is supplied to the electric motor 10 (dH ⁇ H).
  • the thermal expansion amount dH is the increase in the dimension of the convex portion 26 in the protrusion direction DP.
  • the thermal expansion amount dH is the product of the difference between the first linear expansion coefficient ⁇ 1 and the second linear expansion coefficient ⁇ 2, the maximum protrusion amount H, and the temperature rise amount dT (see also equation (1)).
  • the first linear expansion coefficient ⁇ 1 is the linear expansion coefficient of the fastened member 22 (first housing 181).
  • the second linear expansion coefficient ⁇ 2 is the linear expansion coefficient of the screw member 20.
  • the temperature rise amount dT is the amount of temperature rise of the fastened member 22 when the rated current is supplied to the electric motor 10. It is preferable that the thermal expansion amount dH and the maximum protrusion amount H shown in equation (1) satisfy the above-mentioned relationship (dH ⁇ H).
  • the materials of the fastened member 22 and the screw member 20 may be determined so that the following formula (2) is satisfied. This allows the desirable relationship (dH ⁇ H) between the thermal expansion amount dH and the maximum protrusion amount H described above to be established.
  • the fastened member 22 having the above configuration can achieve the effects described below, for example.
  • the convex portion 26 has multiple surfaces 26s. Each of the multiple surfaces 26s may be inclined with respect to the out-of-plane direction of the abutment surface 24s of the fastened portion 24. In this case, it is preferable that the multiple surfaces 26s form an obtuse angle with the abutment surface 24s.
  • the fastened member 22 having the convex portion 26 can be easily manufactured by die casting. In other words, the shape of the convex portion 26 in this embodiment does not hinder the opening and closing of the mold along the protrusion direction DP. Therefore, the fastened member 22 can be easily manufactured by die casting using a mold.
  • the thermal expansion amount dH of the housing 18 when power is applied to the electric motor 10 is greater than the thermal expansion amount of the screw member 20 in that case.
  • the seating surface 20s of the screw member 20 is engaged relatively strongly with the abutment surface 24s, giving the abutment surface 24s a recessed (concave) shape.
  • a gap may form between the abutment surface 24s and the seating surface 20s. The size of this gap is determined according to the amount of contraction (thermal expansion amount dH) of the housing 18.
  • the convex portion 261 has a step 30 facing the rotation direction DR.
  • the step 30 is located between the portion of the convex portion 261 with the smallest protrusion amount (end 26t1) and the portion of the convex portion 261 with the largest protrusion amount (protrusion end 26p).
  • the protrusion amount of the convex portion 261 gradually increases from the position of the step 30 (predetermined position) along the rotation direction DR of the screw member 20.
  • the convex portion 261 bites into the seat surface 20s (see Figure 1B) of the screw member 20.
  • the convex portion 261 biting into the seat surface 20s prevents the screw member 20 from loosening.
  • the convex portion 261 can prevent the screw member 20 from loosening without interfering with the fastening of the screw member 20.
  • the multiple faces 26s of the convex portion 261, including the surface of the step 30, are preferably inclined relative to the out-of-plane direction (protruding direction DP) of the abutment surface 24s. This allows the fastened member 22 having the convex portion 261 to be easily manufactured by die casting (see also one embodiment).
  • face 26s which is the surface of step 30, faces the rotational direction DR. Therefore, face 26s is second face 26s2 (see also one embodiment).
  • the multiple faces 26s of convex portion 261 also include first face 26s1, which is a face 26s located in the opposite direction of rotational direction DR from second face 26s2.
  • First face 26s1 extends along the in-plane direction of contact surface 24s. This allows convex portion 261 to prevent loosening of screw member 20 without interfering with the fastening of screw member 20 (see also one embodiment).
  • FIG. 5 is a perspective view of the protrusion 26 (protrusion 262) according to the second modification.
  • the shape of the convex portion 262 in a plan view is arc-shaped.
  • the arc-shaped convex portion 262 curves along the rotation direction DR of the screw member 20.
  • multiple protrusions 262 may protrude from the fastened portion 24 (see also one embodiment).
  • the multiple protrusions 262 are arranged to surround the opening 28 along the rotational direction DR.
  • the protrusion amount of each of the multiple protrusions 262 gradually increases along the rotational direction DR of the screw member 20.
  • the convex portion 262 bites into the seat surface 20s (see FIG. 1B) of the screw member 20.
  • the convex portion 262 biting into the seat surface 20s prevents the screw member 20 from loosening.
  • the convex portion 262 can prevent the screw member 20 from loosening without interfering with the fastening of the screw member 20.
  • the multiple surfaces 26s of the protrusion 262 are preferably inclined relative to the out-of-plane direction of the abutment surface 24s. This allows the fastened member 22 having the protrusion 262 to be easily manufactured by die casting (see also one embodiment).
  • the multiple surfaces 26s of the protrusion 262 include a first surface 26s1 and a second surface 26s2 (see also one embodiment).
  • the protrusion 262 can prevent the screw member 20 from loosening without interfering with the fastening of the screw member 20.
  • the shape of the convex portion 263 in plan view is a spiral shape extending along the rotation direction DR of the screw member 20.
  • the spiral-shaped convex portion 263 is arranged so as to surround the opening 28. Note that although the number of convex portions 263 shown in Figure 6 is singular, this is not limiting.
  • the amount of protrusion of the convex portion 263 gradually increases along the longitudinal direction of the convex portion 263.
  • the amount of protrusion of the spiral-shaped convex portion 263 gradually increases from the outside of the spiral toward the inside ( Figure 6), but is not limited to this.
  • the amount of protrusion of the spiral-shaped convex portion 263 may also gradually increase from the inside of the spiral toward the outside.
  • the hole 22h may be formed with a female screw thread, in which case the screw member 20 can be threaded into the female screw thread.
  • the fastened member 22 is not limited to the housing 18 of the stator 12.
  • the configuration of the fastened member 22 can be applied to various members that can be fastened by the screw member 20.
  • the housing (181) is a housing provided on a stator (12) of an electric motor (10), and comprises a fastening portion (24) having an opening (28) formed therein into which the shank (20b) of a screw member (20) is inserted, and a convex portion (26) protruding from the fastening portion and engaging with the seat surface (20s) of the screw member when the screw member is fastened.
  • the housing according to Supplementary Note 1 may be a housing in which the protruding amount of the convex portion gradually increases along the rotation direction (DR) of the screw member when the screw member is fastened.
  • the housing described in Appendix 2 may be a housing in which the convex portion has a plurality of surfaces (26s), and each of the plurality of surfaces is inclined with respect to the out-of-plane direction of the abutment surface (24s), which is the surface of the fastened portion with which the seat surface abuts.
  • the housing according to Supplementary Note 3 may be such that the plurality of surfaces form an obtuse angle with the abutment surface.
  • the housing may be the one described in Appendix 3, wherein the plurality of surfaces include a first surface (26s1) extending along the in-plane direction of the abutment surface, and a second surface (26s2) positioned in the rotational direction relative to the first surface and extending along the out-of-plane direction.
  • the housing may be the one described in any one of Supplementary Notes 2 to 5, wherein the shape of the convex portion in plan view is triangular.
  • the housing according to Supplementary Note 6 may be configured such that a cross section of the convex portion along the rotation direction has a shape of a scalene triangle or an isosceles triangle.
  • the housing according to any one of Supplementary Notes 2 to 5 may be such that the shape of the convex portion in plan view is annular, arc-shaped, or spiral-shaped.
  • the fastened member (22) is a fastened member that is fastened using a screw member (20), and is a fastened member that includes a fastened portion (24) formed with an opening (28) into which the shank (20b) of the screw member is inserted, and a convex portion (26) that protrudes from the fastened portion and bites into the seat surface (20s) of the screw member when the screw member is fastened.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Un boîtier selon la présente divulgation est disposé sur un stator d'un moteur électrique, et comprend : une partie fixée dans laquelle est formée une ouverture dans laquelle une partie de tige d'un élément vis est insérée ; et une partie en saillie qui fait saillie à partir de la partie fixée et mord dans une surface d'appui de l'élément vis lorsque l'élément vis est fixé.
PCT/JP2024/013775 2024-04-03 2024-04-03 Boîtier, stator, moteur électrique et élément fixé Pending WO2025210779A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/013775 WO2025210779A1 (fr) 2024-04-03 2024-04-03 Boîtier, stator, moteur électrique et élément fixé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/013775 WO2025210779A1 (fr) 2024-04-03 2024-04-03 Boîtier, stator, moteur électrique et élément fixé

Publications (1)

Publication Number Publication Date
WO2025210779A1 true WO2025210779A1 (fr) 2025-10-09

Family

ID=97266781

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/013775 Pending WO2025210779A1 (fr) 2024-04-03 2024-04-03 Boîtier, stator, moteur électrique et élément fixé

Country Status (1)

Country Link
WO (1) WO2025210779A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184217U (fr) * 1984-11-07 1986-06-03
WO2000077410A1 (fr) * 1999-06-14 2000-12-21 Masaki Yamazaki Dispositif de visserie
JP3095134U (ja) * 2003-01-08 2003-07-25 イワタボルト株式会社 戻り止めボルト
JP2005073407A (ja) * 2003-08-25 2005-03-17 Asmo Co Ltd ケーシング構造及びモータ
WO2005070622A1 (fr) * 2004-01-21 2005-08-04 Nippon Telegraph And Telephone Corporation Dispositif de tournevis et vis associee
JP2012251648A (ja) * 2011-06-07 2012-12-20 Kazuyuki Mitoma ねじ締結体

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184217U (fr) * 1984-11-07 1986-06-03
WO2000077410A1 (fr) * 1999-06-14 2000-12-21 Masaki Yamazaki Dispositif de visserie
JP3095134U (ja) * 2003-01-08 2003-07-25 イワタボルト株式会社 戻り止めボルト
JP2005073407A (ja) * 2003-08-25 2005-03-17 Asmo Co Ltd ケーシング構造及びモータ
WO2005070622A1 (fr) * 2004-01-21 2005-08-04 Nippon Telegraph And Telephone Corporation Dispositif de tournevis et vis associee
JP2012251648A (ja) * 2011-06-07 2012-12-20 Kazuyuki Mitoma ねじ締結体

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