CN201425067Y

CN201425067Y - One-way clutch

Info

Publication number: CN201425067Y
Application number: CN2009201182868U
Authority: CN
Inventors: 梁上斌
Original assignee: Jiu Zhengjun
Current assignee: Jiu Zhengjun
Priority date: 2009-04-21
Filing date: 2009-04-21
Publication date: 2010-03-17
Anticipated expiration: 2019-04-21

Abstract

The utility model provides a one-way clutch, which solves the technical problems of difficult simultaneous operation of rollers, small transmission moment, easy damage, short service life and the likeof the prior one-way clutch. The one-way clutch comprises an inner ring and an outer ring, wherein a shaft hole is manufactured in the center of the inner ring, raceways arranged along the circumference are between the inner ring and the outer ring, the size of the tail end of each raceway increases gradually towards the other end of the raceway, and rollers are arranged in the each raceway. Whenpositioned at the tail end, the rollers are in contact with the inner ring and the outer ring, a retainer is sleeved between the inner ring and the outer ring, a spring is arranged between the retainer and the outer ring and acts on the retainer and the outer ring, the direction of action is identical to that of the rotation of the inner ring, the rollers are enabled to be initially limited at the tail end of the raceway, the retainer is provided with clamping grooves corresponding to the raceways and penetrating in the radial direction, and the rollers are positioned in the corresponding clamping grooves. The utility model can drive the rollers to operate simultaneously, thereby improving the transmission moment and prolonging the service life.

Description

A kind of overrunning clutch

Technical field

The utility model relates to a kind of overrunning clutch, is mainly used in the starting and the gear shift of control motorcycle and electric bicycle.

Background technique

Motorcycle and electric motor car transmit or cut off power source (as motor, motor) by clutch, when clutch and engine crankshaft (perhaps motor reel) when engaging, then transferring power is advanced vehicle, is for the ease of gear shift and cut off power.The structure of clutch generally comprises the interior ring and the outer shroud of mutual socket, interior ring center is shaped on axis hole, axis hole connects engine crankshaft or motor reel, the circumferential inner wall of outer shroud is shaped on a plurality of equally distributed raceways, the equal mounting spring of one side inner radial wall of each raceway, roller is installed in each raceway, the outer wall touching of roller and spring and interior ring, the two ends of outer shroud are respectively equipped with upper cover plate and lower cover plate with interior ring and roller axial restraint, one end of outer shroud connects gear, and the output shaft of gear connects wheel, when roller is not stuck at raceway one, roller just can't arrive outer shroud with the transmission of power of interior ring, promptly presents disengaged position; When roller was stuck, roller will drive outer shroud, made the rotation synchronously of the and then interior ring of outer shroud, be jointing state, but this structure exists following defective: the first, because the accuracy of manufacturing error, cause all rollers often can not work simultaneously, make carry-over moment little, wearing and tearing are big; The second, each roller is spring of the company of touching separately, if a spring necrosis is arranged, just has a roller not work, and causes whole clutch downright bad easily, and working life is short.

Summary of the invention

The purpose of this utility model is at the deficiencies in the prior art, provides a kind of and can impel all roller synchronous workings, and carry-over moment is big, and it is little to wear and tear, the overrunning clutch of long service life.

The purpose of this utility model can realize by following technical proposal: a kind of overrunning clutch, the outer outer shroud of ring in encircling in comprising and being socketed in, the center of interior ring is shaped on the axis hole that is used to connect line shaft, be provided with several raceways between the fitting surface of interior ring and outer shroud by circumferential arrangement, an end that is pointed to by the sense of rotation of interior ring in each raceway is terminal, its tip dimensions is gradually big to the other end of this raceway, be equipped with a roller in each raceway, and roller all contacts with ring with outer shroud when roller is positioned at raceway terminal, it is characterized in that, movable sheath is provided with retainer between described interior ring and the outer shroud, be provided with a spring between retainer and the outer shroud, two of spring acts on respectively on retainer and the outer shroud, its force direction sense of rotation with interior ring all the time is identical, and make each roller when original state, be limited in the end of corresponding raceway, one end of retainer also is provided with some draw-in grooves that radially connect, and the position of each draw-in groove is corresponding one by one with each raceway, and each above-mentioned roller is positioned at corresponding draw-in groove.

Overrunning clutch of the present utility model, the central shaft hole of interior ring and line shaft are (as engine crankshaft, motor reel) links to each other, it all the time with line shaft run-in synchronism, the fitting surface of outer shroud and interior ring is provided with some raceways by circumferential arrangement, its tip dimensions is gradually big to the other end (starting point) of this raceway, be equipped with a roller in each raceway, when roller is positioned at raceway terminal, roller will drive outer shroud and rotate, when roller broke away from raceway terminal, roller just can not contact with outer shroud and interior ring simultaneously, thereby outer shroud and interior ring are separated, be provided with retainer between interior ring and the outer shroud, retainer is strained outer shroud by spring, and spring can stop the counter-rotation of the past and interior ring rotation of retainer, i.e. bonding tropism, outer shroud connects gear, and the output shaft of gear connects wheel.Its concrete working procedure is as follows: because under original state, each roller has been limited in the end of raceway, and retainer is under the effect of spring, with the equidirectional tension of past synchronously interior ring rotation all the time of each roller, cause when interior ring begins to rotate, retainer just forces firmly stuck end at corresponding raceway of each roller quilt, thereby is delivered to the power of interior ring on the outer shroud synchronously, make outer shroud drive wheel and advance, at this moment be jointing state by gear; Otherwise when vehicle wheel rotational speed is higher than the rotating speed of line shaft (when cutting off the power of line shaft), each roller rolls toward the starting point of raceway, causes roller to break away from stuck state, realizes utilizing inertia motion to reach power saving or fuel-efficient purpose.

In above-mentioned overrunning clutch, one end of described retainer is shaped on the cylindricality bulge loop, be shaped on pulling eye one on the peripheral wall of bulge loop, be shaped on pulling eye two on the described outer shroud with on the end face of the mutually same end of bulge loop, two of spring is individually fixed in pulling eye one and the pulling eye two, and this of spring is being shown consideration for the peripheral wall of bulge loop.This mode is simple in structure, and is fixing reliable, and this of spring showing consideration for the peripheral wall of bulge loop, makes the direction of tightening force identical with the direction of interior ring, is circumferencial direction, and spring stress is good, is difficult for disconnection.

In above-mentioned overrunning clutch, described bulge loop is provided with baffle ring outward, and spring is positioned at the inboard of baffle ring.Can guarantee that spring is adjacent to peripheral wall all the time, prevent to produce and depart from and influence stressed.

In above-mentioned overrunning clutch, described each raceway is located at the inwall of outer shroud.Such structure is convenient to processing.

In above-mentioned overrunning clutch, described raceway is 3-12.When reality was made, it was best selecting 6-8 raceway.

In above-mentioned overrunning clutch, described spring is Stainless Steel Wire or manganese steel silk or Spring Steel Wire.Spring can guarantee clutch in engaging process, pins down all the time that retainer is unidirectional to compress each roller, and makes each roller simultaneously in running order, avoids single or the stuck state of the reverse disengaging of part roller.

In above-mentioned overrunning clutch, be provided with wear-resistant sleeve between described interior ring and the retainer.The wearing and tearing of ring in wear-resistant sleeve can reduce, and interior ring can be selected common material, thus reduce cost.

In above-mentioned overrunning clutch, the upper cover plate and the lower cover plate of ring and roller axial restraint in the both ends of the surface of described outer shroud are respectively equipped with and make.Upper cover plate and lower cover plate fuse roller, interior ring, retainer and outer shroud, prevent to fall apart.

Compared with prior art, this overrunning clutch has the following advantages:

1, this overrunning clutch is set up a retainer that pins down by spring with outer shroud between interior ring and outer shroud, and the force direction of the spring sense of rotation with interior ring all the time is identical, and make each roller when original state, be limited in the end of corresponding raceway, also be provided with the draw-in groove that can make each roller drive the outer shroud rotation synchronously on the retainer, replace touching the spring that connects with roller in each raceway in the prior art, can guarantee that all rollers can work simultaneously, avoid occurring the earlier stuck phenomenon of single or several rollers, torsion when having increased work greatly, reduce wearing and tearing, structural stability increases the service life;

2, this of spring is being shown consideration for the peripheral wall of bulge loop, makes the direction of its tightening force also be circumferencial direction, and spring stress is good, is difficult for disconnecting.

Description of drawings

Fig. 1 is the cross-sectional schematic of the utility model overrunning clutch;

Fig. 2 opens A behind the upper cover plate to structural representation among Fig. 1;

Fig. 3 opens B behind the lower cover plate to structural representation among Fig. 1.

Among the figure, 1, interior ring; 11 axis holes; 2, outer shroud; 21, raceway; 22, pulling eye two; 3, roller; 4, upper cover plate; 5, lower cover plate; 6, retainer; 61, draw-in groove; 7, spring; 62, bulge loop; 63, pulling eye one; 64, baffle ring; 8, wear-resistant sleeve.

Embodiment

Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

As Fig. 1, Fig. 2 and shown in Figure 3, this overrunning clutch, comprise interior ring 1 and be socketed in the interior outer shroud 2 that encircles outside 1, the center of interior ring 1 is shaped on axis hole 11, axis hole 11 can connect the engine crankshaft of motorcycle, the motor shaft that also can connect electric motor car, the inwall of outer shroud 2 is provided with 8 raceways 21 by circumferential arrangement, an end that is pointed to by the sense of rotation of interior ring 1 in each raceway 21 is terminal, its tip dimensions is gradually big to the other end (starting point) of this raceway, be equipped with a roller 3 in each raceway 21, and roller 3 all contacts with ring 1 with outer shroud 2 when roller 3 is positioned at raceway 21 terminal, one end of outer shroud 2 connects wheel by gear, go back movable sheath between interior ring 1 and the outer shroud 2 and be provided with retainer 6, be provided with a spring 7 between retainer 6 and the outer shroud 2, two of spring 7 acts on respectively on retainer 6 and the outer shroud 2, its force direction sense of rotation with interior ring 1 all the time is identical, and make each roller 3 when original state, be limited in the end of corresponding raceway 21, end at retainer 6 is provided with some draw-in grooves 61 that radially connect, and the position of each draw-in groove 61 is corresponding one by one with each raceway 21, and the part of roller 3 runs through draw-in groove 61 and matches with draw-in groove 61.

Because under original state, each roller 3 has been limited in the end of raceway 21, and retainer 6 is under the effect of spring 7, with the equidirectional tension of past synchronously interior ring 1 rotation all the time of each roller 3, cause when interior ring 1 begins to rotate, retainer 6 just forces firmly stuck end at corresponding raceway 21 of each roller 3 quilts, thereby the power of interior ring 1 is delivered on the outer shroud 2 synchronously, make outer shroud 2 drive wheel and advance, at this moment be jointing state by gear; Otherwise, when vehicle wheel rotational speed is higher than the rotating speed of line shaft (when cutting off the power of line shaft), as shown in Figure 3, each roller 3 rolls toward the starting point of raceways 21, be that each roller 3 breaks away from stuck state with interior ring 1, realize utilizing inertia motion to reach power saving or fuel-efficient purpose.

For the ease of fixing spring 7, and make the direction of its tightening force identical with the sense of rotation of interior ring 2, be all sense of rotation, thereby prevent spring breakage, can cylindricality bulge loop 62 be set at an end of retainer 6, be shaped on pulling eye 1 on the peripheral wall of bulge loop 62, be shaped on pulling eye 2 22 on the outer shroud 2 with on the end face of bulge loop 62 mutually same ends, two of spring 7 is individually fixed in pulling eye 1 and the pulling eye 2 22, and this of spring 7 is being shown consideration for the peripheral wall of bulge loop 62.For the peripheral wall that makes spring 7 paste bulge loop 62 all the time, can baffle ring 64 be set outside bulge loop 62, spring 7 is positioned at the inboard of baffle ring 64.

In addition, each raceway 21 in this overrunning clutch encircle 1 outer wall in also can being located at, and the quantity of raceway 21 can be chosen between 3-12 except the inwall that can be located at outer shroud 2, from carry-over moment aspect and manufacture view comprehensive analysis, selects 6-8 individual good especially.

Spring 7 in this overrunning clutch can adopt Stainless Steel Wire, manganese steel silk or Spring Steel Wire etc.

In order to reduce cost, can be outside interior ring 1 sheathed wear-resistant sleeve 8, and interior ring 1 can be selected common material.

In order to prevent that roller 3, interior ring 1, retainer 6 from falling apart with outer shroud 2, the upper cover plate 4 and the lower cover plate 5 of ring 1, retainer 6 and roller 3 axial restraints in making can be set respectively in the both ends of the surface of outer shroud 2, also available cover plate carries out axial restraint to an end of outer shroud, the other end leans against on the casing of gear, with casing another cover plate as outer shroud.

Claims

1, a kind of overrunning clutch, comprise interior ring (1) and be socketed in the outer outer shroud (2) of interior ring (1), the center of interior ring (1) is shaped on the axis hole (11) that is used to connect line shaft, be provided with several raceways (21) between the fitting surface of interior ring (1) and outer shroud (2) by circumferential arrangement, an end that is pointed to by the sense of rotation of interior ring (1) in each raceway (21) is terminal, its tip dimensions is gradually big to the other end of this raceway (21), be equipped with a roller (3) in each raceway (21), and roller all contacts with ring (1) with outer shroud (2) when roller (3) is positioned at raceway (21) terminal, it is characterized in that, movable sheath is provided with retainer (6) between described interior ring (1) and the outer shroud (2), be provided with a spring (7) between retainer (6) and the outer shroud (2), two of spring (7) acts on respectively on retainer (6) and the outer shroud (2), its force direction sense of rotation with interior ring (1) all the time is identical, and make each roller (3) when original state, be limited in the end of corresponding raceway (21), one end of retainer (6) also is provided with some draw-in grooves (61) that radially connect, and the position of each draw-in groove (61) is corresponding one by one with each raceway (21), and above-mentioned each roller (3) is positioned at corresponding draw-in groove (61).

2, overrunning clutch according to claim 1, it is characterized in that, one end of described retainer (6) is shaped on cylindricality bulge loop (62), be shaped on pulling eye one (63) on the peripheral wall of bulge loop (62), described outer shroud (2) is gone up on the end face with the mutually same end of bulge loop (62) and is shaped on pulling eye two (22), two of spring (7) is individually fixed in pulling eye one (63) and the pulling eye two (22), and this of spring (7) is being shown consideration for the peripheral wall of bulge loop (62).

3, overrunning clutch according to claim 2 is characterized in that, described bulge loop (62) is outer to be provided with baffle ring (64), and spring (7) is positioned at the inboard of baffle ring (64).

4, overrunning clutch according to claim 1 is characterized in that, described each raceway (21) is located at the inwall of outer shroud (2).

According to claim 1 or 4 described overrunning clutchs, it is characterized in that 5, described raceway (21) is 3-12.

6, overrunning clutch according to claim 1 is characterized in that, described spring (7) is Stainless Steel Wire or manganese steel silk or Spring Steel Wire.

7, overrunning clutch according to claim 1 is characterized in that, is provided with wear-resistant sleeve (8) between described interior ring (1) and the retainer (6).

8, overrunning clutch according to claim 1 and 2 is characterized in that, the both ends of the surface of described outer shroud (2) are respectively equipped with upper cover plate (4) and the lower cover plate (5) that makes interior ring (1), retainer (6) and roller (3) axial restraint.