Overrunning clutch

Abstract

The utility model discloses an overrun clutch which comprises an inner retainer, an outer retainer, an inclined supporting block and a wave spring, the inner retainer is located in an inner cavity of the outer retainer, the wave spring is arranged between the inner retainer and the outer retainer, and the inclined supporting block is located in an inner window of the inner retainer and an outer window of the outer retainer. An annular groove I is formed in one side of the inner wall of the inner retainer along the circumference, an inner damping strip is arranged in the annular groove I, an annular groove II is formed in one side of the outer wall of the outer retainer along the circumference, and an outer damping strip is arranged in the annular groove II. The outer damping strips and the inner damping strips are in non-rigid connection with the corresponding outer roller paths and the corresponding inner roller paths through friction contact, the influence of inertia generated by high-speed rotation during switching of the working states of the overrun clutch is reduced through friction force, the slipping situation is reduced, and the response speed of the overrun clutch is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of clutches, in particular to an overrunning clutch. Background Art

[0002] An overrunning clutch, also known as a one-way clutch, automatically engages and disengages by utilizing the change in relative rotation speed of the master and slave parts, or the change in rotation direction. It is a device that can only transmit power from one direction.

[0003] The diagonal brace overrunning clutch is mainly divided into the forced continuous constraint type and the full-phase type. The full-phase overrunning clutch is usually composed of inner and outer retainers, diagonal brace blocks, and wave springs. A centering damping device can be added according to the working conditions. This type of clutch has the following problems during use:

[0004] (1) Poor overload resistance, prone to slipping, flipping and other failure modes when subjected to large impact;

[0005] (2) It is not suitable for working conditions with frequent engagement and disengagement. The response delay is high under high-frequency engagement and disengagement conditions.

[0006] (3) Frequent slippage will aggravate the wear of the diagonal support block and the inner and outer raceways;

[0007] (4) The damping card installed in the window hole of the outer cage will limit the flexibility of the brace block. Utility Model Content

[0008] In order to solve the above problems, the utility model provides an overrunning clutch with reasonable structure, capable of bearing high-frequency impact and rapid response.

[0009] The utility model is realized by the following technical solutions:

[0010] An overrunning clutch comprises an inner cage, an outer cage, a diagonal support block and a wave spring, wherein the inner cage is located in an inner cavity of the outer cage, the wave spring is arranged between the inner cage and the outer cage, and the diagonal support block is located in an inner window of the inner cage and an outer window of the outer cage;

[0011] An annular groove I is circumferentially arranged on one side of the inner wall of the inner retainer, an inner damping strip is arranged in the annular groove I, and an annular groove II is circumferentially arranged on one side of the outer wall of the outer retainer, an outer damping strip is arranged in the annular groove II, and the outer damping strip and the inner damping strip are both non-rigidly connected to the corresponding outer raceway and inner raceway through friction contact.

[0012] Furthermore, the inner damping strips and the outer damping strips are regular polygonal opening structures.

[0013] Furthermore, the inner damping strip includes a plurality of polygonal damping edges I and a bent edge I formed by bending two adjacent polygonal damping edges I at an angle, the bent edge I is the friction contact point of the annular groove I, and the center of the polygonal damping edge I is the inner raceway friction contact point.

[0014] Furthermore, the outer damping strip includes a plurality of polygonal damping edges II and a bent edge II formed by bending two adjacent polygonal damping edges II at an angle, the bent edge II is an outer raceway friction contact point, and the center of the polygonal damping edge II is an annular groove II friction contact point.

[0015] Furthermore, the inner damping strip is installed in the annular groove I by shrinking, and the outer damping strip is installed in the annular groove II by expanding.

[0016] Furthermore, the inner damping strip and the outer damping strip are both clearance-matched with the corresponding annular groove I and annular groove II.

[0017] Furthermore, the annular groove I and the annular groove II are respectively located on the same side of the inner retainer and the outer retainer.

[0018] Furthermore, the inner damping strip and the outer damping strip are made of beryllium copper alloy material.

[0019] The beneficial effects of the utility model are:

[0020] 1. The overrunning clutch of the utility model reduces the occurrence of failure modes such as slipping and flipping under large impact through the resistance of the inner and outer damping strips;

[0021] 2. The overrunning clutch of the utility model reduces the inertia force of the clutch and its components and improves the engagement and disengagement response speed through the resistance effect of the inner and outer damping strips.

[0022] 3. The overrunning clutch of the utility model reduces the contact stress between the diagonal support block and the inner raceway through the internal damping strip, thereby increasing the overrunning service life;

[0023] 4. In the utility model overrunning clutch, the inner and outer damping strips are installed on one side of the retaining frame, which will not affect the flexibility of the diagonal support block. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a partial cross-sectional view of the utility model;

[0026] Figure 3 Schematic diagram of the outer cage structure;

[0027] Figure 4Schematic diagram of the inner cage structure;

[0028] Figure 5 is a schematic diagram of the external damping strip structure;

[0029] Figure 6 is a schematic diagram of the internal damping strip structure;

[0030] Figure numerals: 1, outer retaining frame, 101, annular groove II, 2, diagonal support block, 3, outer damping strip, 301, bending edge II, 302, polygonal damping edge II, 4, wave spring, 5, inner retaining frame, 501, annular groove I, 6, inner damping strip, 601, bending edge I, 602, polygonal damping edge I. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0032] Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0034] As shown in the figure, an overrunning clutch comprises an inner cage 5, an outer cage 1, a diagonal support block 2, and a wave spring 4, wherein the inner cage 5 is located in the inner cavity of the outer cage 1, the wave spring 4 is arranged between the inner cage 5 and the outer cage 1, and the diagonal support block 2 is located in the inner window of the inner cage and the outer window of the outer cage;

[0035] The inner retainer 5 is increased in axial width compared with the conventional retainer, and an annular groove Ⅰ501 is circumferentially arranged on one side of the inner wall of the inner retainer 5, and an inner damping strip 6 is arranged in the annular groove Ⅰ501. The outer retainer 1 is increased in axial width compared with the conventional retainer, and an annular groove Ⅱ101 is circumferentially arranged on one side of the outer wall of the outer retainer 1, and an outer damping strip 3 is arranged in the annular groove Ⅱ101. The outer damping strip 3 and the inner damping strip 6 are non-rigidly connected to the corresponding outer raceway and inner raceway through friction contact. The friction force reduces the influence of inertia caused by high-speed rotation when the overrunning clutch switches the working state, reduces the occurrence of slipping, and improves the response speed of the overrunning clutch.

[0036] The annular groove I 501 and the annular groove II 101 are respectively located on the same side of the inner retainer 5 and the outer retainer 1 , that is, the inner and outer damping strips of the present application are installed on the same side of the retainer, which will not affect the flexibility of the diagonal support block.

[0037] The inner damping strip 6 and the outer damping strip 3 should have certain elasticity and wear resistance and be relatively soft in hardness compared to steel. The present application selects beryllium copper alloy material. The inner damping strip 6 and the outer damping strip 3 are regular polygonal opening structures. The outer damping strip 3 and the inner damping strip 6 are respectively fixed in the grooves on the outer retainer and the inner retainer through the elastic force generated by expansion and contraction. And the inner damping strip 6 and the outer damping strip 3 are both gap-matched with the corresponding annular groove Ⅰ501 and annular groove Ⅱ101.

[0038] Furthermore, the inner damping strip 6 includes a plurality of polygonal damping edges Ⅰ602 and a bent edge Ⅰ601 formed by bending the angle between two adjacent polygonal damping edges Ⅰ602, the bent edge Ⅰ601 is the friction contact point of the annular groove Ⅰ501, and the center of the polygonal damping edge Ⅰ602 is the inner raceway friction contact point.

[0039] Furthermore, the outer damping strip 3 includes a plurality of polygonal damping edges II302 and a bent edge II301 formed by bending two adjacent polygonal damping edges II302 at an angle, the bent edge II301 is an outer raceway friction contact point, and the center of the polygonal damping edge II302 is an annular groove II101 friction contact point.

[0040] In summary, the utility model reduces the occurrence of failure modes such as slipping and flipping under large impacts through the resistance of the inner and outer damping strips, reduces the inertia force of the clutch and its components, and improves the engagement and disengagement response speed.

[0041] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. An overrunning clutch, characterized in that: The invention comprises an inner retainer (5), an outer retainer (1), a diagonal support block (2), and a wave spring (4), wherein the inner retainer (5) is located in an inner cavity of the outer retainer (1), the wave spring (4) is arranged between the inner retainer (5) and the outer retainer (1), and the diagonal support block (2) is located in an inner window of the inner retainer and an outer window of the outer retainer; An annular groove I (501) is provided along the circumference on one side of the inner wall of the inner retainer (5), and an inner damping strip (6) is provided in the annular groove I (501). An annular groove II (101) is provided along the circumference on one side of the outer wall of the outer retainer (1), and an outer damping strip (3) is provided in the annular groove II (101). The outer damping strip (3) and the inner damping strip (6) are both non-rigidly connected to the corresponding outer raceway and inner raceway through friction contact.

2. An overrunning clutch according to claim 1, characterized in that: The inner damping strip (6) and the outer damping strip (3) are regular polygonal opening structures.

3. An overrunning clutch according to claim 2, characterized in that: The inner damping strip (6) comprises a plurality of polygonal damping edges I (602) and a bent edge I (601) formed by bending two adjacent polygonal damping edges I (602) at an angle, the bent edge I (601) being a friction contact point of the annular groove I (501), and the center of the polygonal damping edge I (602) being a friction contact point of the inner raceway.

4. An overrunning clutch according to claim 2, characterized in that: The outer damping strip (3) comprises a plurality of polygonal damping edges II (302) and a bent edge II (301) formed by bending two adjacent polygonal damping edges II (302) at an angle, the bent edge II (301) being an outer raceway friction contact point, and the center of the polygonal damping edge II (302) being an annular groove II (101) friction contact point.

5. An overrunning clutch according to claim 1 or 2, characterized in that: The inner damping strip (6) is installed in a shrink-fit manner in the annular groove I (501), and the outer damping strip (3) is installed in annular groove II (101) in an expanded manner.

6. An overrunning clutch according to claim 1, characterized in that: The inner damping strip (6) and the outer damping strip (3) are both clearance-matched with the corresponding annular groove I (501) and annular groove II (101).

7. An overrunning clutch according to claim 1, characterized in that: The annular groove I and the annular groove II are respectively located on the same side of the inner retainer (5) and the outer retainer (1).

8. An overrunning clutch according to claim 1, characterized in that: The inner damping strip (6) and the outer damping strip (3) are made of beryllium copper alloy material.

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