TWI381110B - Clutch for a rotary drive device - Google Patents

Description

Intermittent rotary drive clutch

The present invention relates to a clutch structure, and more particularly to an intermittent type rotary drive clutch that automatically clutches when the drive structure is reset.

Press, the mop is a must-have cleaning floor tool, but the traditional mop must be cleaned and cleaned and wrung out to clean the large area of the floor. It is very inconvenient to use and the user is cleaned each time the harness is cleaned. The bucket must be bent to make the cleaning work a rather tiring job. Especially in the winter, it is unbearable that the user's hands are constantly in contact with cold water or cleaning fluid. Therefore, some operators have adopted a rotating design on the head of the mop and then used centrifugal force to dry the water on the mop head, which is a novel and intimate design. However, the design of the transmission mechanism of many commercially available mop dehydration structures is not perfect, and there are still many structural defects to be improved.

The existing mop dehydration mechanism usually adopts the intermittent method, and cooperates with a one-way bearing to achieve the effect of the rotary transmission, and utilizes the centrifugal force generated during the rotation to achieve the purpose of dehydration of the hydrophobic water. However, one-way bearings are prone to lose their transmission function due to water or sand. When the one-way bearing is wetted by water, if it does not rotate for a while, it is easy to be stuck due to rust; in addition, if the fine sand adhered to the mop after mopping the ground enters the one-way bearing, The one-way bearing will be worn, the gap will be enlarged, and the bite function will be lost and the transmission will not be possible.

Therefore, some manufacturers have developed the use of the external pawl to achieve the purpose of the card drive, the principle of which is mainly to use the centrifugal force generated during the rotation to make the pawl open outward and snap to the driven member. The ratchet on the top, and the purpose of driving. However, when the drive unit is reset, the pawl is still in a rotating state, so it will reverse the ratchet teeth. Although it will not affect the normal transmission, it will produce "tick" noise and easily cause the pawl and ratchet. Wear, which causes it to lose precision, which in turn causes an inaccurate engagement.

The reason is that the inventor of the present invention has been continually researching and improving in the light of the perseverance and the purpose of excellence in the transmission of the above-mentioned mop dehydration structure, and has finally developed and designed the present invention through long-term efforts and experiments.

SUMMARY OF THE INVENTION A primary object of the present invention is to solve the above problems and to provide an intermittent rotary drive clutch that automatically clutches when a drive structure is reset.

In order to achieve the above object, the present invention mainly includes a turntable that is concentrically connected to the top surface of the sun gear of the planetary gear set, at least one pawl pivoted on the turntable, and is concentrically sleeved on the turntable and surrounds the pawl The brake ring is a drive plate concentrically disposed on the brake ring and accommodating the pawl, wherein the periphery of the brake ring is in contact with the inner wall of the clutch housing and generates an appropriate frictional force. When the planetary gear set is rotated by the external force, the turntable rotates in conjunction with the sun gear, and at the moment when the turntable starts to rotate, the brake ring does not act in the first time due to the frictional force with the casing. That is, the rotation starts (relative to the turntable back), the pawl is disengaged from the brake ring, and the centrifugal force generated by the rotation of the turntable is outwardly biased, thereby driving the drive disc to rotate, and the rotating drive disc can take one. The power output structure rotates to output power. When the driving force of the planetary gear disappears and the sun gear is reversely driven, the brake ring acts on the frictional force of the planetary ring to rotate the brake ring forward relative to the turntable, forcibly turning the pawl inward. The pawl is disengaged from the engagement state of the drive plate, and the purpose of automatic clutching is achieved.

The above and other objects and advantages of the present invention will be readily understood from

Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in the specification and their construction is shown in the drawings.

The present invention relates to an intermittent rotary drive clutch that automatically disengages when the drive structure is reset. Referring to Figures 1 to 4, the main mechanism comprises a sun gear concentrically coupled to the planetary gear set (100) ( 101) a top turntable (10), at least one pawl (20) pivoted on the turntable, a brake ring concentrically disposed on the turntable (10) and surrounding the pawl (20) (3) 0) A driving disk (40) concentrically disposed on the brake ring (30) and accommodating the pawl (20). When the planetary gear set (100) is rotated by an external force, the turntable (10) is rotated in conjunction with the sun gear (101), and the brake ring (30) is at the moment when the turntable (10) starts to rotate. The frictional force with the casing does not start to rotate at the first time (relative to the turntable retreat), so that the pawl (20) is released from the brake ring (30) and is rotated by the turntable (10). The generated centrifugal force is outwardly yawed, thereby driving the drive plate (40) to rotate, and the rotating drive plate (40) is capable of driving a power output structure (50). In the preferred embodiment of the present invention, the power output The structure (50) is a shaft that is snapped onto the drive plate (40). When the driving force of the planetary gear set (100) disappears and the sun gear (101) is reversely driven, the brake ring (30) acts on the friction ring (30) due to its friction with the housing (60). ) Rotating forward relative to the turntable (10), forcibly pulling the pawl (20) inward, disengaging the pawl from the engagement state of the drive disc, and achieving the purpose of automatic clutching.

The turntable (10) is provided with at least one pivoting seat (11) and at least one pivoting seat (11). In the more preferred embodiment of the present invention, the driving force of the driving disk (40) is relatively high. On average, the turntable (10) is provided with three pivoting seats (11) and each of the pivoting seats (11) is pivotally provided with a corresponding pawl. Since each group of pivoting seats (11) and the pawl (20) are identical in structure, the following is only described in detail for one of the groups.

One end of the pivoting seat (11) is formed with a receiving hole (111) and the other end thereof is provided with a retaining edge (112). The arrangement of the receiving hole (111) and the retaining edge (112) is dependent on the turntable ( 10) The direction of rotation is set. A first protrusion (12) and a second protrusion (13) are respectively disposed on the outer edge of the turntable (10), and the two protrusions (12, 13) respectively correspond to the socket (111) and the flange (112).

A pivot post (21) received in the socket (111) and a guide post (22) extending outwardly are respectively protruded from the bottom ends of the pawl (20). The pawl (20) is a centrifugal force generated when the turntable (10) is rotated, And selectively extending outward.

The brake ring (30) is selectively rotatable relative to the turntable (10) due to its frictional force with the housing (60), and at least one top block is radially convex on the inner wall thereof. The number of the top blocks (31) is set according to the number of pawls (20). The top block (31) is moved between the corresponding first stud (12) and the second stud (13), and selectively pushes the guide post (22) inwardly to fit the pawl (20) Corresponding to the rim (112). An outer edge of the brake ring (30) is provided with a spring piece (32) corresponding to each of the top blocks (31), and the free end of the elastic piece (32) is rubbed against the inner wall of a casing (60), and The action of the brake ring (30) is made more reliable by the action of friction.

The bottom surface of the driving plate (40) is formed with a circular groove (41) for receiving the pawl (20), and the periphery of the circular groove (41) is formed with a series of ratchets (42), the pawl (20) ) is selectively snapped onto the series of ratchets (42) to drive the drive disc (40) to rotate. A drive structure (43) is formed in the center of the drive plate (40), and the drive structure (43) is for interlocking a power output structure (50). In a preferred embodiment of the present invention, the preferred embodiment of the present invention The power output structure (50) is a rotating shaft that is engaged with the drive structure (43) of the drive plate (40).

Referring to the third figure, when the planetary gear set (100) is rotated by an external force, the turntable (10) is rotated in conjunction with the sun gear (101), and the turntable (10) starts to rotate. The brake ring (30) acts due to the friction between the brake ring (30) and the housing (60), and does not start to rotate at the first time (relative to the turntable), so that the guide post (22) of the pawl (20) Disengaged from the top of the top block (31) of the brake ring (30) and deflected outward by the centrifugal force generated by the rotation of the turntable (10), thereby engaging the ratchet (42) to drive the drive plate (40) Rotating, and rotating the drive plate (40) can be used to drive a power output structure (50). Referring to the fourth figure, when the driving force of the planetary gear set (100) disappears and the sun gear (101) is reversely driven, the brake ring (30) is rubbed against the casing (60). The force acts to rotate the brake ring (30) forward relative to the turntable (10), and the top block (31) again uses the guide post (22) to push the pawl (20) inwardly, forcing the pawl (20) Disengaged from the engagement state of the ratchet (42) of the drive disc (40), and when the planetary gear set (100) is driven again, it returns to the state as shown in the third figure, thereby driving the power output structure repeatedly (50). ), and achieve the purpose of automatic clutching, and thereby reduce noise and extend the service life of the drive structure.

The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

From the above detailed description, those skilled in the art can understand that the present invention can achieve the foregoing objects, and no similar publications are found in similar processes or products, and the patent law has been met, and a patent application is filed according to law.

100‧‧‧ planetary gear set

101‧‧‧Sun Gear

10‧‧‧ Turntable

11‧‧‧ pivoting seat

111‧‧‧ jack

112‧‧‧ 挡缘

12‧‧‧First stud

13‧‧‧second stud

20‧‧‧ pawl

21‧‧‧ pivot column

22‧‧‧ Guide column

30‧‧‧Brake ring

31‧‧‧Top block

32‧‧‧Shrap

40‧‧‧ drive disk

41‧‧‧round slot

42‧‧‧ ratchet

43‧‧‧ Transmission structure

50‧‧‧Power output structure

60‧‧‧shell

The first figure is a schematic perspective view of the present invention.

The second drawing is a perspective exploded view of the present invention.

The third figure is a schematic diagram of the first operation of the present invention.

The fourth figure is a schematic diagram of the second operation of the present invention.

100. . . Planetary gear set

101. . . Sun gear

10. . . Turntable

11. . . Pivot socket

111. . . Jack

112. . . Retaining edge

12. . . First stud

13. . . Second stud

20. . . pawl

twenty one. . . Pivot column

twenty two. . . Guide column

30. . . Brake ring

31. . . Top block

32. . . shrapnel

40. . . Disk drive

41. . . Round groove

42. . . Ratchet

50. . . Power output structure

60. . . case

Claims (3)

The utility model relates to an intermittent rotary drive clutch, which mainly comprises a turntable connected concentrically on the top surface of the sun gear of the planetary gear set, at least one pawl pivoted on the turntable, concentrically sleeved on the turntable and surrounding the spine a brake ring of a claw, a driving disk concentrically disposed on the brake ring and accommodating the pawl, wherein a periphery of the brake ring is in contact with an inner wall of the clutch housing to generate an appropriate friction force; The number of the pawl is convexly provided with at least one pivoting seat, one end of the pivoting seat is formed with a receiving hole and the other end of the pivoting seat is provided with a retaining edge, and the arrangement of the receiving hole and the retaining edge is determined by the turntable a rotation direction is provided; a first protrusion and a second protrusion are respectively extended on the outer edge of the turntable, and the two protrusions respectively correspond to the insertion hole and the retaining edge; the bottom ends of the pawl are respectively perpendicular Extending a pivot post housed in the socket and a guide post extending outwardly; the pawl is selectively extended outward by a centrifugal force generated when the turntable rotates; and a bottom surface of the drive plate is formed a circular groove for receiving a pawl, the periphery of the circular groove Forming a series of ratchets, the pawl is selectively clamped on the series of ratchets to drive the drive disc to rotate; the drive disc is centrally formed with a transmission structure for interlocking the power output structure; When the planetary gear set is driven by external force and rotates, the turntable rotates in conjunction with the sun gear, and when the turntable starts to rotate, the brake ring will not act in the first time due to its frictional force with the casing. Start to rotate (relative to the turntable back), so that the pawl is released from the brake ring and deflected outward by the centrifugal force generated by the rotation of the turntable, thereby driving the drive plate to rotate, and the rotating drive plate can be powered The output structure rotates and outputs power; when the driving force of the planetary gear disappears and the sun gear is reversely driven, the brake ring acts on the frictional force of the brake ring to rotate forward relative to the turntable, and the brake will be forced The pawl is turned inward, so that the pawl is disengaged from the engagement state of the driving disc, and the purpose of automatic clutching is achieved. The intermittent type rotary drive clutch according to claim 1, wherein the brake ring is selectively rotatable relative to the turntable due to the frictional force between the brake ring and the radial direction of the inner wall At least one top block is convexly disposed, and the number of the top blocks is set according to the number of the pawls; the top block is moved between the corresponding first and second columns, and selectively pushes the column inwardly Fit the pawl to Corresponding to the retaining edge. The intermittent type rotary drive clutch according to claim 2, wherein a peripheral edge of the brake ring is provided with a spring piece corresponding to each of the top blocks, and the free end of the elastic piece is connected to the inner wall of a casing. Friction, and the action of the friction ring makes the action of the brake ring more accurate.