CN218863136U

CN218863136U - Double-retainer overrunning clutch

Info

Publication number: CN218863136U
Application number: CN202222802165.3U
Authority: CN
Inventors: 李继锋; 李泽强; 张作超; 马磊; 韩红雨; 孟鸿超; 李慎华; 张开
Original assignee: Luoyang Bearing Research Institute Co Ltd
Current assignee: Luoyang Bearing Research Institute Co Ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-04-14
Anticipated expiration: 2032-10-24
Also published as: WO2024087943A1

Abstract

The utility model provides a two retainer freewheel clutches belongs to freewheel clutch technical field. The overrunning clutch comprises an inner retainer, an outer retainer and wedges correspondingly installed in window holes on the inner retainer and the outer retainer, wherein elastic pieces are fixedly arranged on a lintel of at least one window hole in the inner retainer and the outer retainer, the elastic pieces correspond to the wedges one by one so as to apply elastic acting force to one end of the corresponding wedge towards the inner side in the radial direction, and the elastic acting force is used for keeping the corresponding wedge in a wedged state. The utility model provides a two retaining frame freewheel clutches has effectively solved among the prior art two retaining frame freewheel clutches because of the wave form spring position is unset lead to wave form spring to the unbalanced and less technical problem of elastic force that each voussoir was applyed.

Description

Double-retainer overrunning clutch

Technical Field

The utility model relates to a two retainer freewheel clutches belongs to freewheel clutch technical field.

Background

At present, a double-retainer overrunning clutch generally comprises an inner race, an outer race, wedges, an inner retainer, an outer retainer, a wave spring and a damping card, for example, a sprag type overrunning clutch is disclosed in chinese patent application with application publication number of CN112324816A of 2015.01.28, as shown in fig. 1, the sprag type overrunning clutch comprises an inner race 1, an inner retainer 2, a wave spring 3, an outer retainer 4 and an outer race 5 which are sequentially arranged from inside to outside, a plurality of wedges 6 are arranged between the inner race 1 and the outer race 5, all wedges 6 are circumferentially distributed at intervals along the inner race 1, and all wedges 6 are correspondingly arranged in window holes of the inner retainer 2, the wave spring 3 and the outer retainer 4, and elastic sheets for applying elastic acting force to each wedge 6 are arranged on a bridge of the window holes of the wave spring 3 to force the wedges 6 to keep pressure contact with the inner race and the outer race of the inner race 1 and the outer race 5 of the inner race to realize normal operation of the overrunning clutch.

When the inclined strut type overrunning clutch is used, the inner ring is used for being in transmission connection with the driving part, the wedge block is wedged tightly in a torque transmission state, the inner ring, the inner retainer, the wave spring, the wedge block, the outer retainer and the outer ring are relatively and fixedly assembled together to drive the outer ring to rotate, and the outer ring is used as a power output part to output torque; under the overrunning state, the rotating speed of the outer ring exceeds the rotating speed of the inner ring, the wedge block swings towards the direction of disengaging from the raceway of the inner ring, and the clutch is in the overrunning state.

There are some problems in the application of the sprag overrunning clutch described above, specifically as follows: when the wave spring applies elastic acting force to each wedge block, each wedge block also applies counterforce to the wave spring, and the wave spring only passes through the window hole on the wedge block to fix the wedge block; meanwhile, the wave spring rotates when being subjected to the counterforce, so that the elastic acting force of the wave spring on each wedge block is small.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a two retainer freewheel clutches to solve among the prior art two retainer freewheel clutches because of the wave form spring position unfixed elastic force that leads to the wave form spring to exert is uneven and the less technical problem of elastic force to each voussoir.

The utility model discloses well two retainer freewheel clutches adopts following technical scheme:

the overrunning clutch with the double retainers comprises an inner retainer, an outer retainer and wedge blocks correspondingly installed in window holes on the inner retainer and the outer retainer, wherein elastic pieces are fixedly arranged on a lintel of at least one window hole in the inner retainer and the outer retainer, the elastic pieces correspond to the wedge blocks one by one so as to apply elastic acting force to one end of the corresponding wedge block towards the inner side in the radial direction, and the elastic acting force is used for keeping the corresponding wedge block in a wedged state.

Has the advantages that: the utility model provides a double-retainer overrunning clutch based on the improvement of the prior art, under the torque transmission state, a wedge block keeps a wedge-tight state under the action of an elastic piece, so that an inner ring and an outer ring of the clutch rotate synchronously; under the overrunning state, the wedge block overcomes the elastic acting force to swing under the action of centrifugal force, the wedge block is separated from contact with the inner ring raceway, and the clutch is in the overrunning state. In the overrunning clutch provided by the embodiment, the elastic pieces are fixedly arranged on the window hole lintel and correspond to the wedges one by one, so that when the elastic pieces receive the reaction force of the wedges, the elastic pieces cannot move relatively and the elastic pieces are stressed independently, the stress balance of the wedges is ensured, and the synchronism of the wedges when the wedges are disengaged from the inner ring raceway is improved. Moreover, because the elastic part is fixedly arranged on the aperture lintel of the retainer, the elastic part can not move after receiving the reaction force, the elastic action force of the elastic part on the wedge block is increased, and the analysis is integrated; moreover, the elastic piece can provide larger elastic force for the wedge block, so that the quality of the clutch is improved, and the clutch can adapt to the working condition with higher speed.

Furthermore, the elastic piece is fixedly arranged on the window hole lintel of the inner retainer.

Has the advantages that: the elastic piece is fixedly arranged on the inner retainer, and the distance between the elastic piece and the corresponding end of the wedge block can be reduced, so that the size of the elastic piece can be reduced, and the raw material supply of the elastic piece is saved.

Further, the elastic member includes an elastic piece which is bent outward in the radial direction to press against the corresponding end of the wedge.

Has the advantages that: the elastic piece is used for jacking the wedge block through the elastic piece which is bent outwards in the radial direction, so that the structure of the elastic piece is simplified, and the elastic piece is more convenient to process.

Further, the elastic member includes a mounting portion by which the elastic member is detachably fixed to the window lintel of the corresponding holder.

Has the advantages that: the elastic part is easy to deform and lose efficacy after being used for a period of time, and the elastic part can be detachably fixed on the corresponding retainer through the mounting part, so that the corresponding elastic part can be conveniently disassembled, assembled and replaced, the replacement of the whole retainer is avoided, and the use cost of the overrunning clutch is reduced.

Further, the mounting portion includes a clip, and the elastic member is snap-fitted and fixed to the window hole lintel of the corresponding holder by the clip.

Has the advantages that: when the elastic element is installed, the elastic element is clamped and fixed on the window hole lintel of the corresponding retainer through the clamp, so that the assembly and disassembly are very convenient, and the assembly and maintenance efficiency of the overrunning clutch can be improved.

Furthermore, the clip comprises a U-shaped clamping groove, the U-shaped clamping groove is formed by bending an elastic plate, the groove walls of the U-shaped clamping groove extend in an opposite inclined mode, so that the notch of the U-shaped clamping groove is closed, and the clip is clamped and fixed on the window hole lintel of the corresponding retainer through the U-shaped clamping groove.

Has the beneficial effects that: when the clip is clamped, the notch of the U-shaped clamping groove is firstly opened for the window hole beam to enter the U-shaped clamping groove, and then the notch of the U-shaped clamping groove is restored to a closed shape under the action of elastic force, so that the clamping of the clip is completed, and the clamping is very convenient; moreover, because the notch of the U-shaped clamping groove is in a closing-in mode, the anti-falling function can be achieved on the clamp in the radial direction, the elastic piece is prevented from being separated from the retainer when in use, and the quality of the overrunning clutch is improved.

Furthermore, the window hole lintel is provided with an axial limiting groove for clamping the clip, and the width of the axial limiting groove is matched with the width of the clip in the axial direction.

Has the advantages that: the elastic element is clamped in the axial limiting groove on the window hole lintel through the clamp, and the width of the axial limiting groove is matched with that of the clamp, so that the groove wall of the axial limiting groove is used for limiting the clamp in the axial direction, the elastic element is ensured not to move in the axial direction when applying elastic acting force to the wedge block, the stability of the elastic element during use is ensured, and the quality of the overrunning clutch is improved.

Drawings

FIG. 1 is a state diagram of a prior art sprag overrunning clutch;

FIG. 2 is a schematic structural view of embodiment 1 of the overrunning clutch with two retainers of the present invention;

fig. 3 is a schematic structural view of the outer cage of fig. 2;

FIG. 4 is a schematic view of the structure of the elastic member of FIG. 2;

FIG. 5 is a schematic structural view of the inner cage of FIG. 2;

FIG. 6 is a schematic view of the condition of the wedge between the inner race and the outer race;

fig. 7 is a schematic structural view of an outer cage in embodiment 7.

The names of the components corresponding to the corresponding reference numerals in the drawings are:

in fig. 1: 1. an inner ring; 2. an inner cage; 3. a wave spring; 4. an outer cage; 5. an outer ring; 6. a wedge block;

in fig. 2 to 6: 100. an inner ring; 101. an inner cage; 102. an outer cage; 103. a window aperture; 104. a window lintel; 105. an axial limiting groove; 106. a flange; 107. a notch; 108. a T-shaped structure; 109. an outer ring; 110. a wedge block; 111. a contact line; 112. an elastic member; 113. a clip; 114. an elastic sheet;

in fig. 7: 200. an outer cage; 201. a flange; 202. a notch; 203. t-shaped structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention, i.e., the described embodiments are merely illustrative of some, but not all, of the embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the embodiments, are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises a component of 8230; \8230;" comprises an element of 8230; "etc. may occur does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the component.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" as may be used herein are to be construed broadly, e.g., as being fixed or releasably connected or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art through specific situations.

The present invention will be described in further detail with reference to examples.

The utility model discloses well two retainers freewheel clutch's embodiment 1:

as shown in fig. 2, the double-retainer overrunning clutch (hereinafter referred to as an overrunning clutch) provided in this embodiment includes an inner ring 100, an inner retainer 101, an outer retainer 102, and an outer ring 109, which are sequentially arranged from inside to outside, wherein a plurality of wedges 110 are arranged between the inner ring 100 and the outer ring 109, each wedge 110 is distributed at intervals along the circumferential direction of the inner ring 100, all the wedges 110 are correspondingly installed in window holes 103 of the inner retainer 101 and the outer retainer 102, an elastic member 112 is fixedly installed on a window hole lintel 104 of the inner retainer 101, the elastic member 112 corresponds to each wedge 110 one by one to apply an elastic acting force to the corresponding wedge 110, and the wedge 110 is kept in a wedged state with the inner ring 100 and the outer ring 109 of the overrunning clutch under the action of the elastic acting force.

In the present embodiment, the elastic member 112 includes a mounting portion and an elastic support portion, the elastic member 112 is detachably fixed to the inner holder 101 by the mounting portion, specifically, as shown in fig. 2, 4 and 5, the elastic member 112 is formed by bending an elastic plate, specifically, an elastic metal plate is preferable in the present embodiment, the mounting portion includes a clip 113, and the elastic member 112 is snap-fixed to the window hole lintel 104 of the inner holder 101 by the clip 113. The elastic support portion is an elastic piece 114, and the elastic piece 114 is bent outward in the radial direction to press against one end of the corresponding wedge 110 toward the inner side in the radial direction, that is, one end of the wedge 110 close to the inner race 100.

In this embodiment, in order to prevent the elastic member 112 from moving in the axial direction, as shown in fig. 5, the window hole lintel 104 of the inner holder 101 is provided with an axial limiting groove 105, and the width of the axial limiting groove 105 is adapted to the width of the clip 113 in the axial direction so as to limit the position of the clip 113 when the clip 113 is clamped in the axial limiting groove 105. In addition, in order to prevent the elastic member 112 from moving in the radial direction, as shown in fig. 4, the clip 113 includes a U-shaped slot, the U-shaped slot is formed by bending the elastic member, and the slot walls of the U-shaped slot extend in opposite directions in an inclined manner, so that the opening of the U-shaped slot is closed. When the clip is installed, the notch of the U-shaped clamping groove is firstly opened for the window hole beam to enter the U-shaped clamping groove, and then the notch of the U-shaped clamping groove is restored to be in a closed shape under the action of elastic force, so that the clamping of the clip is completed.

In this embodiment, in order to ensure that the outer holder 102 always rotates synchronously with the outer ring 109, as shown in fig. 3, a notch 107 is provided on the flange 106 at one axial end of the outer holder 102, in the circumferential direction of the outer holder 102, the notches 107 are respectively located at two sides of the cross beam of the window hole 103 on the outer holder 102, so that the flange 106 section between the two notches and the cross beam of the corresponding window hole 103 form a T-shaped structure 108 together, and in the radial direction of the outer holder 102, the T-shaped structure 108 swings outwards to keep frictional contact with the outer ring 109. The T-shaped structure 108 can replace an external damping clamp, when the overrunning clutch is rapidly accelerated and decelerated, the T-shaped structure 108 overcomes the inertia force of the outer retainer 102 and the wedge block 110, so that the overrunning clutch is more rapidly engaged and disengaged, and the abrasion of the wedge block 110 can be reduced.

In the present embodiment, as shown in fig. 6, a connecting line of contact points between the outer ring 109 and the inner ring 100 and the wedge 110 is defined as a contact line 111, a center of mass of the wedge 110 is located on one side of the contact line 111, it should be emphasized that the center of mass of each wedge 110 needs to be located on the same side of the corresponding contact line 111, and each elastic member needs to press the side of the wedge 110, so that when the outer ring 109 rotates over and over, the wedge 110 is separated from contact with the raceway of the inner ring 100 under the centrifugal force.

The overrunning clutch provided by the embodiment is used in the following process that the inner ring 100 is in transmission connection with the driving part, the wedge 110 is wedged tightly in a torque transmission state, the inner ring 100, the inner retainer 101, the wave spring, the wedge 110, the outer retainer 102 and the outer ring 109 are relatively and fixedly assembled together to drive the outer ring 109 to rotate, and the outer ring 109 is used as a power output part to output torque; in the overrunning state, the outer ring 109 rotates in an overrunning manner, the wedge 110 is separated from contact with the inner ring 100 raceway under the action of centrifugal force, and the clutch is in the overrunning state. Compared with the overrunning clutch in the prior art, in the overrunning clutch provided in this embodiment, because the elastic members 112 are fixedly arranged on the inner retainer 101 and correspond to the wedges 110 one by one, when the elastic members 112 receive the reaction force of the wedges 110, the elastic members 112 do not move relatively and the elastic members 112 are stressed independently, so that the stress balance of the wedges 110 is ensured, and the synchronism of the wedges 110 when being disengaged from the raceway of the inner ring 100 is improved. Moreover, because the elastic member 112 is fixedly arranged on the inner holder 101, the elastic member 112 does not move after receiving a reaction force, and the elastic force of the elastic member 112 on the wedge block 110 is increased.

The utility model discloses well two retainers freewheel clutch's embodiment 2:

the difference between the embodiment and the embodiment 1 is that in the embodiment 1, an axial limiting groove for clamping the clip is arranged on the window hole lintel of the inner retainer. In the embodiment, the window hole lintel of the inner retainer is not provided with an axial limiting groove, and the length of the window hole lintel of the inner retainer is matched with the width of the clamp in the axial direction, so that flanges at two ends of the inner retainer limit the elastic element.

The utility model discloses well two retainers freewheel clutch's embodiment 3:

the difference between the embodiment and the embodiment 1 is that in the embodiment 1, the clip includes a U-shaped slot, and the clip is clamped and fixed on the window hole lintel of the corresponding retainer through the U-shaped slot. In the embodiment, the clamp comprises a claw, and the clamp is clamped and fixed on the window hole lintel of the corresponding retainer through the claw.

The utility model discloses well two retainers freewheel clutch's embodiment 4:

this embodiment is different from embodiment 1 in that, in embodiment 1, the mounting portion includes a clip. In this embodiment, the mounting portion does not include a clip, the mounting portion includes a mounting block, a mounting protrusion is disposed on the mounting block, a mounting hole is disposed on the inner holder, and the elastic member is embedded in the mounting hole of the inner holder through the mounting protrusion on the mounting block.

The utility model discloses well two retainers freewheel clutch's embodiment 5:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the elastic member is detachably fixed to the window hole lintel of the inner holder by a clip. In this embodiment, the elastic member is integrally provided on the window hole lintel of the inner holder.

The utility model discloses well two retainers freewheel clutch's embodiment 6:

this embodiment differs from embodiment 1 in that in embodiment 1 the spring comprises a spring plate by means of which the spring is pressed against the respective end of the wedge. In this embodiment, the elastic member includes a compression spring disposed on a side of the elastic member facing the wedge, and the elastic member is pressed against a corresponding end of the wedge by the compression spring.

The utility model discloses well two retainers freewheel clutch's embodiment 7:

the present embodiment is different from embodiment 1 in that in embodiment 1, the elastic member is fixed to the window hole lintel of the inner holder. In the embodiment, the elastic element is fixedly arranged on the window hole lintel of the outer retainer.

The utility model discloses well two retainers freewheel clutch's embodiment 8:

the difference between this embodiment and embodiment 1 is that in embodiment 1, a notch is provided on a flange at one axial end of the outer holder to form a T-shaped structure at one axial end of the outer holder. In this embodiment, as shown in fig. 7, the flanges 201 at the two axial ends of the outer holder 200 are provided with notches 202 to form T-shaped structures 203 at the two axial ends of the outer holder.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-retainer overrunning clutch comprises an inner retainer (101), an outer retainer (102) and wedges (110) correspondingly installed in window holes (103) on the inner retainer and the outer retainer, and is characterized in that elastic pieces (112) are fixedly arranged on a window hole lintel (104) of at least one of the inner retainer and the outer retainer, wherein the elastic pieces (112) correspond to the wedges (110) one by one so as to apply elastic acting force to one end, facing towards the inner side, of the corresponding wedge (110) in the radial direction, and the elastic acting force is used for keeping the corresponding wedge (110) in a wedged state.

2. The double-cage overrunning clutch according to claim 1, wherein the elastic member (112) is fixedly arranged on the window lintel (104) of the inner cage (101).

3. The dual-cage overrunning clutch according to claim 2, wherein the resilient member (112) includes a resilient tab (114), the resilient tab (114) being radially outwardly bent to press against a corresponding end of the wedge (110).

4. The dual cage overrunning clutch according to claim 1, 2 or 3, wherein the resilient member (112) comprises a mounting portion by which the resilient member (112) is removably secured to the aperture lintel (104) of the respective cage.

5. The double-cage overrunning clutch according to claim 4, wherein the mounting portion comprises a catch (113), and the elastic member (112) is snap-fitted to the window lintel (104) of the corresponding cage by means of the catch (113).

6. The overrunning clutch with double retainers according to claim 5, wherein the clips (113) comprise U-shaped slots, the U-shaped slots are formed by bending elastic plates, the slot walls of the U-shaped slots extend obliquely towards each other, so that the notches of the U-shaped slots close up, and the clips (113) are clamped and fixed on the window hole lintel (104) of the corresponding retainer through the U-shaped slots.

7. The double-retainer overrunning clutch according to claim 5, wherein the window hole lintel (104) is provided with an axial limiting groove (105) for clamping the clamp (113), and the width of the axial limiting groove (105) is matched with the width of the clamp (113) in the axial direction.