TWI672445B - Stepped pin type one-way bearing - Google Patents

Abstract

A stepped pin type one-way bearing comprises: an outer ring body, wherein the receiving groove is provided with an inner ring body uniformly covered with a plurality of stepped tooth grooves, and two sets of bushings are mounted on the inner ring body On both sides, the outer ring body and the inner ring body are relatively rotatable; a plurality of latching holes are equiangularly disposed on the outer circumference of the outer ring body, and along a tangential direction of the outer ring edge of the inner ring Provided that each of the card holes is respectively provided with a pin, a compression spring, and a pressing member; thereby, when the inner ring body rotates in the forward direction, each pin is respectively topped by a slanted wall of a tooth groove Touching, thereby driving the outer ring body to rotate synchronously; when the inner ring body is reversed, each pin will respectively withstand the straight wall top contact of a tooth groove and the compression and extension of a compression spring, so that the pin is in the card The hole reciprocates and slides to form an effect that the inner ring body is idling and the outer ring body is not driven. Since the present invention utilizes a pin and a stepped cogging structure to form a one-way bearing running device and cooperates with a concave enlarged bearing surface, the related components are easy to assemble and can withstand high torque, and there is no between the pin and the tooth groove. The trouble of the carding makes the invention have the benefit of high service life.

Description

Stepped pin type one-way bearing

The present invention relates to a one-way bearing, and more particularly to a device for applying a pin and a stepped tooth groove structure to constitute a one-way bearing operation.

According to the action principle of the one-way bearing, the driven member can be driven to rotate synchronously when the driving member rotates forward, and the driven member cannot be driven when the driving member is reversed; the function of the one-way bearing can only transmit torque in one direction In the opposite direction, the active member will only be idling; therefore, its main purpose is to prevent the active member from rotating backwards in anticipation of the reverse rotation of the workpiece. Since the one-way bearing has a function of preventing reverse transmission, it is widely used in a mechanism including a bicycle and a power machine having a reversal concern.

1A is a structure of a ratchet type one-way bearing 90; wherein the inner circumference of the outer ring body 91 is evenly provided with a plurality of slots 911, and the slot 911 has a straight wall 912, and the inner ring body 92 is peripherally The edge is evenly provided with a plurality of hook arms 921 having elastic lifting, and the free end of the hook arm 921 can be swinged with a fixed arc relative to the inner ring body 92; the inner ring body 92 is mounted on the outer ring In the body 91, the free ends of the plurality of hook arms 921 just touch the straight wall 912 of the slot 911 of the outer ring body 91; when the inner ring body 92 is rotated by a driving member in a clockwise direction, the hook The free end of the arm 921 will be inserted into the slot 911, thereby driving the follower attached to the outer ring body 91 to rotate in a clockwise direction; when the inner ring body 92 is activated When the member is rotated in the counterclockwise direction, the free end of the hook arm 921 is pressed by the tooth shape of the tooth groove 911, so that the inner ring body 92 is idling and the outer ring body 91 is not driven.

However, as can be seen from the structure of FIG. 1A, it is quite difficult to assemble the hook arm 921 in the ratchet type one-way bearing 90 in the inner ring body 92 so that it can perform a fixed arc swing; The arm 921 has a plurality of corners, and is easily jammed in the slot 911 of the outer ring body 91 due to the transmission of a large torque force by the active member, so that the ratchet type one-way bearing 90 exhibits a locking phenomenon and damages the transmission motor; The structure also cannot meet the needs of high torque and small volume.

1B is a structure of a spherical latching one-way bearing 80; it is provided between a outer ring body 1 and a toothed ring 21 with a plurality of balls 24, and the outer ring body 1 and the teeth are provided. The ring 21 is relatively moved; wherein the ring gear 21 is disposed in the receiving groove 11 of the outer ring body 1, and the plurality of balls 24 and the plurality of elastic bodies 25 are respectively disposed in the plurality of through holes 12 of the outer ring body 1; When the motive member 21 rotates in one direction by the motive member 5, the plurality of balls 24 are locked in the plurality of slots 22 provided in the ring gear 21 to produce the effect of the transmission follower 6; when the motive member 5 drives the ring gear 21 When rotating in the opposite direction, since the inclined surface 223 of the tooth groove 22 pushes the ball 24, the ring gear 21 is only idling, so that the power transmission effect is not obtained.

As can be seen from the structure of FIG. 1B, the ball 24 is immersed in the through hole 12 due to the pushing of the beveled surface 223 of the ring gear 21, and falls into the arc groove 222 due to the return of the elastic body 25. Therefore, the ball body type one-way bearing 80 The large torque can be transmitted without causing the locking phenomenon to damage the transmission motor; however, the ball 24 and the elastic body 25 are assembled in the through hole 12, and the assembly work will be very difficult due to the lack of positioning means in front and rear.

Accordingly, the primary object of the present invention is to provide a one-way bearing structure that can withstand high torque and is easy to assemble.

A second object of the present invention is to provide a one-way bearing structure that is less prone to jamming and has a high service life.

In order to achieve the above object, the technical means adopted by the present invention comprises: an outer ring body, which is a hollow ring body, and has an accommodating groove at an inner circumference thereof; and an inner ring body, which is also a hollow ring body, and is attached The outer peripheral edge of the outer ring body is provided with a plurality of stepped tooth grooves, and each tooth groove has a straight wall and an inclined wall, and the center of the inclined wall is concave inward to form a a concave arc to the straight wall, such that the straight wall forms a concave enlarged supporting surface along the concave arc; two sets of bushings are mounted on both sides of the inner ring body, thereby making the inner ring body The outer ring body is relatively rotated with the outer ring body; a positioning member is disposed on the outer side of the inner ring body, so that the inner ring body and the two sets of bushings are positioned in the receiving groove of the outer ring body The at least one latching hole is disposed from the outer circumference of the outer ring along the tangential direction of the outer edge of the inner ring, and the bottom of the hole is provided with a pin having a slot, a compression spring, and one end of the pin is inserted into the pin. In the slot, a pressing member is inserted into the latching hole, and the inner end of the slot is pressed against the other end of the compression spring, and the latch is When the position at the bottom of the card into the gullet of the inner ring, the inner bottom surface of the top plug of the cogging contact the enlarged bearing surface, a cylindrical surface which would contact the top of the inclined wall of the gullet.

According to the foregoing feature, the present invention further provides a plurality of latching holes, and is disposed at an equiangular angle on the outer circumference of the outer ring body, and each of the latching holes is respectively provided with a latch and a compression spring. And a pressing member, and each of the latches is synchronously contacted by the inclined wall of the slot when the inner ring body rotates in the forward direction, and each latch will bear the straight wall of the tooth slot when the inner ring body rotates in the reverse direction The top contact and the compression and compression of the compression spring are synchronously reciprocatingly sliding in the latching hole.

According to the foregoing feature, the two sets of bushings are two sets of ring pieces, and when the inner ring body and the outer ring body rotate relative to each other, the two side faces of the inner ring body respectively pivot on the ring piece; The positioning member is a C-shaped buckle, and a groove is formed at an outer end of the outer ring receiving groove for mounting the C-shaped buckle, so that the inner ring body and the two sets of ring pieces are It can be positioned in the receiving groove of the outer ring body.

According to the foregoing feature, the two sets of bushings are two sets of rolling bodies, and each set of rolling systems respectively includes a retainer and a plurality of steel balls evenly distributed on the retainer, when the inner ring body and the outer ring body When the ring body rotates relative to each other, the two side faces of the inner ring body respectively pivot on the plurality of steel balls; further, the positioning member is a side ring body, and the side ring body is hollow, and the outer circumference is set. The outer ring end of the outer ring body receiving groove is provided with an internal thread corresponding to the external thread, so that the side ring body can be screwed into the outer ring body receiving groove, thereby making the inner ring The body and the two sets of rolling elements are positioned in the receiving groove of the outer ring body.

According to the foregoing feature, the inner ring body of the present invention further has an inner key groove for interlocking with an external driving shaft; and the outer ring body further has an outer key groove for the outer periphery thereof, thereby providing an external key groove. The moving shaft is linked.

Therefore, when the inner ring body is rotated in the forward direction by the outer active shaft, the latch in each of the latching holes is simultaneously contacted by the inclined wall of the tooth groove, thereby driving the outer ring body to be connected thereto. The driven shaft is also synchronously rotated in the forward direction; when the inner ring body is rotated in the opposite direction by the external driving shaft, the pin in each of the latching holes receives the top contact of the straight wall of the tooth gap and the compression of the compression spring Acting, and synchronously reciprocating sliding in the latching hole, forming an effect that the inner ring body idles and the outer ring body is not driven.

Since the invention applies the relationship between the plug and the stepped tooth groove to form a contact and slide relationship to form a one-way bearing operation effect, and cooperates with a concave enlarged bearing surface, the related components are easy to assemble and can withstand high torque. Moreover, the present invention has the benefit of high service life due to the fact that there is no jam between the pin and the slot; therefore, the present invention will achieve the goal of improvement.

10‧‧‧ outer ring

11‧‧‧ accommodating slots

12‧‧‧ Ring groove

13‧‧‧Card hole

14‧‧‧ Foreign keyway

15‧‧‧ internal thread

16‧‧‧ trench

20‧‧‧ Inner ring

21‧‧‧ cogging

211‧‧‧ Straight wall

212‧‧‧ sloping wall

213‧‧‧ concave arc

214‧‧‧Enlarged bearing surface

22‧‧‧Sliding trough

24‧‧‧Internal keyway

30‧‧‧ bushing

30 A‧‧‧ Rings

30 B‧‧‧ rolling elements

31‧‧‧keeper

32‧‧‧ steel balls

40‧‧‧ Positioning parts

40 A‧‧‧C type buckle

40 B‧‧‧Side ring

41‧‧‧ external thread

42‧‧‧ 施力孔

51‧‧‧Latch

511‧‧‧Slots

512‧‧‧ bottom

513‧‧‧ cylindrical surface

52‧‧‧Compressed spring

53‧‧‧Top press

531‧‧‧Slots

60‧‧‧Drive shaft

61‧‧‧first party key

70‧‧‧ driven shaft

71‧‧‧second party key

Figure 1A is a cross-sectional view showing a conventional ratchet type one-way bearing structure.

Fig. 1B is a cross-sectional view showing a conventional spherical latching one-way bearing structure.

2A is an exploded perspective view of a preferred embodiment of the present invention.

Figure 2B is an exploded perspective view of another possible embodiment of the present invention.

3A is a perspective view of a three-dimensional combination of a preferred embodiment of the present invention.

Figure 3B is a perspective view of a stereoscopic combination of another possible embodiment of the present invention.

4A is a side cross-sectional view of a preferred embodiment of the present invention.

Figure 4B is a side cross-sectional view of another possible embodiment of the present invention.

Figure 5 is a front cross-sectional view showing an embodiment of the present invention.

Fig. 6A is a schematic view showing the forward rotation of the embodiment of the present invention.

FIG. 6B is a schematic diagram of the idling of the embodiment of the present invention.

FIG. 6C is a schematic diagram of the idling of the embodiment of the present invention.

Figure 7 is a schematic view of the embodiment of the present invention mounted between a drive shaft and a driven shaft.

Figure 8 is an enlarged perspective view showing the structure of the tooth groove of the present invention.

Figure 9 is an enlarged perspective view showing the contact groove of the present invention in contact with the pin.

First, referring to FIG. 2A and FIG. 2B, the embodiment of the stepped pin type one-way bearing of the present invention comprises: an outer ring body 10, an inner ring body 20, two sets of bushings 30, and a positioning member 40. In the preferred embodiment, the two sets of bushings 30 are two sets of ring segments 30A, and the positioning member 40 is a C-shaped retaining ring 40A, as shown in FIG. 2A; in another possible embodiment The two sets of bushings 30 are two sets of rolling bodies 30B, and the positioning piece 40 is a side ring body 40B, as shown in FIG. 2B.

In the embodiment of the present invention, the outer ring body 10 is a hollow ring body, and has an accommodating groove 11 on the inner circumference thereof for receiving the inner ring body 20 and the two sets of ring pieces 30A. Or the two sets of rolling elements 30B, and the outer ring body 10 is provided with a ring groove 12 at the outer circumference, and the ring groove 12 is provided with three latching holes 13 at equal angles, and each of the latching holes 13 is From the surface of the annular groove 12 of the outer ring body 10, along the tangential direction of the outer edge of the inner ring body 20 assembled in the receiving groove 11; in the embodiment of the invention, the number of the latching holes 13 is set to three. However, the outer ring body 10 is further provided with a key groove 14 perpendicular to the ring groove 12 so as to be interlocked with an external driven shaft (not shown).

In the embodiment of the present invention, the inner ring body 20 is also a hollow ring body, and is disposed at a central portion of the accommodating groove 11 of the outer ring body 10, and has a plurality of stepped teeth on the outer periphery thereof. The groove 21, and each of the slots 21 has a straight wall 211 and a slanted wall 212. In the present embodiment, please refer to FIG. 8 and FIG. 9 together, and an enlarged perspective view of the structure of the tooth groove 21 is shown. The center of the inclined wall 212 is concave inwardly to form a concave arc 213 to the straight wall 211, so that the straight wall 211 forms a concave enlarged supporting surface 214 along the concave arc 213, and the design is an enlarged tooth. The contactable area of the groove 21 avoids the problem that the support surface is too small to be loose, and the detailed function will be described later. Further, a sliding groove 22 is disposed on each side of the tooth groove 21 for mounting the two sets of ring pieces 30A or the two sets of rolling elements 30B. Further, the inner circumference of the inner ring body 20 is further provided with a The inner keyway 24 is coupled to an external drive shaft (not shown).

In the embodiment of the present invention, the two sets of bushings 30 are mounted on two sides of the inner ring body 20, so that the inner ring body 20 and the outer ring body 10 are relatively rotated; 40 is mounted on the outer side of the inner ring body 20, so that the inner ring body 20 and the two sets of bushings 30 can be positioned in the receiving groove 11 of the outer ring body 10; For example, as shown in FIG. 2A, FIG. 3A and FIG. 4A, the two sets of bushings 30 are two sets of ring pieces 30A, and the positioning piece 40 is a C-shaped buckle 40A, and the outer ring body 10 accommodates the groove. A groove 16 is disposed at the outer end of the outer ring body 10, so that the inner ring body 20 and the two sets of ring pieces 30A are positioned in the outer ring body 10. When the inner ring body 20 is rotated relative to the outer ring body 10, the two side faces of the inner ring body 20 can be pivoted on the ring piece 30A, respectively, thereby the outer ring body 10 is pivoted. Relative rotation with the inner ring body 20.

In another possible embodiment, as shown in FIGS. 2B, 3B, and 4B, the two sets of bushings 30 are two sets of rolling bodies 30B, and the positioning member 40 is a side ring body 40B; each set of rolling elements 30B, comprising a retainer 31, and a plurality of steel balls 32 uniformly distributed on the retainer 31, the two sets of rolling elements 30B are mounted on the sliding grooves 22 on both sides of the inner ring body 20; the side ring The body 40B is also a hollow ring body, and the outer end surface thereof is provided with a plurality of force applying holes 42, and the outer peripheral edge thereof is provided with an external thread 41, and the outer ring end of the outer ring body 10 is matched with the outer end of the receiving groove 11 The internal thread 15 is inserted into the urging hole 42 to be screwed to each other, and the inner ring body 20 and the two sets of rolling elements 30B are positioned in the accommodating groove 11 of the outer ring body 10. And when the inner ring body 20 and the outer ring body 10 are relatively rotated, the two side faces of the inner ring body 20 are respectively pivoted on the two sets of rolling bodies 30B, thereby making the outer ring body 10 and The inner ring bodies 20 are relatively rotated between each other.

Referring to FIG. 5 , the latching hole 13 is respectively provided with a latch 51 , a compression spring 52 , and a pressing member 53 . The latch 51 is disposed at the bottom of the latching hole 13 . The inner edge of the pressing spring 52 is inserted into the slot 511 of the latch 51. The inner end of the pressing member 53 also has a slot 531 for pressing the compression. The upper end of the spring 52, when the pin 51 is placed at the bottommost position of the latching hole 13, can be inserted into the slot 21 of the inner ring body 20, as shown in FIG. 8 and FIG. The center of the inclined wall 212 is concave inwardly to form a concave arc 213 to the straight wall 211, so that the straight wall 211 forms a concave enlarged supporting surface 214 along the concave arc 213, and the bottom surface of the pin 51 is at this time. 512 will touch the concave support surface 214 of the straight wall 211 of the tooth groove 21, and its cylindrical surface 513 will touch the concave arc 213 of the inclined wall 212 of the tooth groove 21. As a result, the latch The contact area of the bottom surface and the tooth groove 21 is increased, as shown by the dashed line in Fig. 9, which can prevent the contact faces of the two from being too small and easy to be loose. Referring to FIG. 4A, FIG. 4B and FIG. 5, in the assembly manner of the embodiment of the present invention, the two sets of ring pieces 30A/rolling bodies 30B are first assembled on the sliding grooves 22 on both sides of the inner ring body 20. Re-inserting into the receiving groove 11 of the outer ring body 10; Continuingly, in the preferred embodiment, the C-shaped clasp 40A is placed in the groove 16 of the outer ring body 10 to make the inner ring body 20 And the two sets of ring segments 30A are positioned in the receiving slots 11 of the outer ring body 10; in another possible embodiment, the outer ring body 40B is externally threaded 41 and the outer ring body 10 by hand. The threaded rods 15 are screwed to each other, and then inserted into the urging hole 42 by the tooling hand, so that the side ring body 40B is integrally locked into the outer end of the accommodating groove 11 of the outer ring body 10, so that the inner ring body 20 and The two sets of rolling elements 30B are positioned in the receiving slots 11 of the outer ring body 10; the plug 51 is first placed in the bottom of the latching hole 13, and the lower end of the compression spring 52 is placed in the latch 51. In the slot 511, the pressing member 53 is finally inserted into the latching hole 13 so that the slot 531 at the inner end thereof presses the upper end of the compression spring 52; thus, the latch 51 can be inserted into the inner ring. Teeth of body 20 21, and the bottom surface 512 of the pin 51 will touch the enlarged supporting surface 214 of the concave wall 211 of the tooth groove 21, and the cylindrical surface 513 thereof will touch the concave arc of the inclined wall 212 of the tooth groove 21. 213. In the same manner and procedure, the other two sets of the latch 51, the compression spring 52, and the pressing member 53 are placed in the other two latching holes 13, as shown in Fig. 5, that is, the assembly work of this embodiment is completed.

FIG. 6A is a schematic view showing the forward operation of the embodiment of the present invention, wherein the inner ring body 20 is rotated in the forward direction by an external driving shaft (not shown), and the outer ring is at this time. The pin 51 of the ring body 10 of the ring body 10 has a cylindrical surface 513 which is simultaneously contacted by the inclined wall 212 of the tooth groove 21, so that the outer ring body 10 is driven and synchronously rotates in the forward direction. 6B and FIG. 6C are schematic diagrams showing the inner ring body 20 idling according to an embodiment of the present invention, in a state in which the inner ring body 20 is rotated in the opposite direction by an external driving shaft (not shown). The bottom pin 512 of the ring body 10 of the ring body 10 is slid upward by receiving the top contact of the straight wall 211 of the tooth groove 21 until the bottom surface 512 is completely separated from the top touch of the straight wall 211. Please refer to FIG. 6B. As shown, at this time, the compression spring 52 assumes a compressed state, and since the pin 51 has been disengaged from the top contact of the straight wall 211 of the slot 21, the energy stored by the compression spring 52 will cause its return. Then, the compression spring 52 is pushed to slide downward until the bottom surface 512 again touches the straight wall 211 of the slot 21, as shown in FIG. 6C; since the inner ring body 20 is rotated in the reverse direction, the pin 51 The outer ring body 10 can only be rotated and reciprocated in the card hole 13 , so that the inner ring body 20 is freely idling, thereby achieving the present invention. The pin 51 and the stepped tooth groove 21 form a one-way bearing. Effect.

FIG. 7 is a schematic view showing a state of use of the present invention. In the figure, a first square key 61 is inserted into the inner key groove 24 of the inner ring body 20 to interlock the inner ring body 20 with a drive shaft 60. The other second square button 71 penetrates into the outer key groove 14 of the outer ring body 10 to interlock the outer ring body 10 with a driven shaft 70; thereby, when the inner ring body 20 is interlocked by the outer drive shaft 60 In the forward rotation, the latch 51 in each of the latching holes 13 is simultaneously contacted by the inclined wall 212 of the slot 21, thereby driving the driven shaft 70 coupled to the outer ring body 10 to be synchronized. When the inner ring body 20 is rotated in the opposite direction by the outer driving shaft 60, the pin 51 in each of the latching holes 13 receives the top contact of the straight wall 211 of the tooth groove 21 and the pressure of the compression spring 52. During the extension, the reciprocating sliding in the latching hole 13 forms an effect that the driving shaft 60 drives the inner ring body 20 to idle and the driven shaft 70 that the outer ring body 10 is connected to be undriven.

To sum up, the technical means disclosed in the present invention have the invention patents such as "novelty", "progressiveness" and "available for industrial use", and pray for the patent to be invented by the bureau. German sense.

The drawings and the descriptions of the present invention are merely preferred embodiments of the present invention, and those skilled in the art, which are subject to the spirit of the present invention, should be included in the scope of the patent application.

Claims (8)

A stepped pin type one-way bearing comprises: an outer ring body having a receiving groove at an inner circumference thereof; an inner ring body being installed in a receiving groove of the outer ring body, the outer circumference of which is uniformly distributed a plurality of stepped slots, each of which has a straight wall and an inclined wall, and the center of the inclined wall is concave inward to form a concave arc to the straight wall, so that the straight wall follows the concave arc Forming a concave enlarged supporting surface; two sets of bushings are mounted on both sides of the inner ring body, so that the inner ring body and the outer ring body are relatively rotated; a positioning member is attached The inner ring body and the two sets of bushings are positioned in the receiving grooves of the outer ring body; at least one latching hole is located along the outer periphery of the outer ring body The outer edge of the ring is arranged in a tangential direction, and a hole having a slot is arranged at the bottom of the hole, and a compression spring is disposed at one end of the slot of the pin, and a pressing member is inserted into the hole of the latch. The inner end is pressed against the other end of the compression spring, and the pin is inserted into the slot of the inner ring body when the pin is placed at the bottom end position, so that the insertion The inner side of the bottom surface touches the enlarged supporting surface of the tooth groove, and the cylindrical surface thereof touches the inclined wall of the tooth groove; thereby, when the inner ring body rotates in the forward direction, the inclined wall of the tooth groove will touch the pin to drive The outer ring body rotates together; when the inner ring body rotates in the reverse direction, the pin will bear the top contact of the straight wall of the tooth gap and the pressing action of the compression spring, so that the pin slides back and forth in the latch hole, and The effect that the inner ring body is idling and the outer ring body is not driven is formed. The stepped pin type one-way bearing according to claim 1, wherein the plurality of latching holes are disposed at an equal angle and disposed on an outer circumference of the outer ring body, and each of the latching holes respectively a latch, a compression spring, and a pressing member are mounted, and each of the latches is synchronously touched by the oblique wall of the slot when the inner ring body rotates in the forward direction, and each of the inner ring bodies rotates in the reverse direction The pin will bear the top contact of the straight wall of the tooth gap and the pressing action of the compression spring, and synchronously reciprocally slide in the latch hole. The stepped pin type one-way bearing according to claim 1 or 2, wherein the two sets of bushings are two sets of ring pieces, and when the inner ring body and the outer ring body rotate relative to each other, the inner ring body Both sides of the ring are pivoted on the ring piece, respectively. The stepped pin type one-way bearing according to claim 1 or 2, wherein the two sets of bushings are two sets of rolling bodies, and the rolling bodies respectively comprise a retainer and are evenly distributed on the retainer And a plurality of steel balls thereon, and when the inner ring body and the outer ring body rotate relative to each other, the two side faces of the inner ring body respectively pivot on the plurality of steel balls. The stepped pin type one-way bearing according to claim 3, wherein the positioning member is a C-shaped buckle, and a groove is provided at an outer end of the outer ring receiving groove for mounting The C-shaped buckle. The stepped pin type one-way bearing according to claim 4, wherein the positioning member is a one-side ring body, and the outer circumferential edge of the side ring body is provided with an external thread, and the outer ring body receiving groove The outer end of the outer ring is provided with an internal thread, and the side ring body can be screwed into the outer ring receiving groove. The stepped pin type one-way bearing according to claim 1, wherein the inner circumference of the inner ring body is provided with an inner key groove for interlocking with an external drive shaft. The stepped pin type one-way bearing according to claim 7, wherein the outer circumference of the outer ring body is provided with an outer key groove for interlocking with an outer driven shaft.