Clutch separation device

Abstract

The utility model relates to a clutch, in particular to a clutch separating device which aims to solve the technical problem that in an existing separating system, a separating shifting fork is prone to eccentric wear and clamping stagnation in the working process. The device comprises a release bearing and a release shifting fork, one end of the release shifting fork is provided with a pair of shifting fork arms, the ends of the pair of shifting fork arms are located on the two sides of the release bearing respectively, and the two sides of one end of the release bearing are each provided with a protruding block part. Each C-shaped tension spring comprises a first straight line section, a bent connecting section and a second straight line section which are connected in sequence; the two protruding block parts are respectively provided with a first positioning hole, and the pair of shifting fork arms are respectively provided with a second positioning hole. The pair of C-shaped tension springs is connected with the convex block parts on the same side through the first linear sections and the first positioning holes, and is connected with the shifting fork arms on the same side through the second linear sections and the second positioning holes; and gaps are formed between the opposite end surfaces of the pair of shifting fork arms and the release bearing.

Description

Technical Field

[0001] This utility model relates to clutches, specifically to a clutch disengagement device. Background Technology

[0002] As the automotive industry continues to develop, users are placing increasingly higher demands on the reliability and safety of vehicles. Clutch disengagement performance is particularly important in this regard. Poor disengagement performance can degrade the user experience and negatively impact the entire vehicle and related components.

[0003] In existing separation system designs, the separation bearing is typically positioned using the end face of the separation fork. This often leads to uneven wear of the separation fork and subsequent separation jamming during operation.

[0004] Chinese invention patent application CN113323970A discloses a clutch disengagement device with an adjustable positioning structure. This device includes a disengagement fork and a disengagement bearing. While retaining the main structures of the disengagement bearing and disengagement fork, the structure adds a fork positioning surface to the disengagement fork, with the fork positioning surface and the bearing positioning surface positioned opposite each other. This structure retains the advantages of the rolling friction of the disengagement rollers while optimizing the positioning of the disengagement bearing, avoiding the problem of uneven wear and jamming of the disengagement rollers during operation. However, in this invention, the fork positioning surface on the disengagement fork and the bearing positioning surface on the disengagement bearing are in contact, which may still cause uneven wear of the disengagement fork and disengagement jamming during operation.

[0005] Chinese utility model patent CN216951371U discloses a clutch release device, including a primary bearing cover, a first release roller, a second release roller, a release bearing, a first positioning pin, and a second positioning pin. The release bearing is mounted on the primary bearing cover, and the first and second release rollers are symmetrically arranged on both sides of the release bearing. The release bearing is connected to the release fork via the first and second release rollers. The first and second positioning pins are respectively located at the upper ends of the first and second release rollers and are fixed to the working surfaces on both sides of the release bearing. The working surface of the release bearing is a curved surface. During operation, the first and second release rollers contact the working surfaces of the release bearing. This design allows for the release fork assembly to remain unchanged, only optimizing the positioning of the release bearing and solving the problem of uneven wear and jamming of the release rollers during operation. However, after prolonged use, the first and second positioning pins are prone to deformation under stress, affecting the positioning effect. Utility Model Content

[0006] The purpose of this invention is to solve the technical problem that the release fork in the existing release system is prone to uneven wear and jamming during operation, and to provide a clutch release device.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A clutch disengagement device includes a release bearing and a release fork. One end of the release fork has a pair of fork arms, the ends of which are located on opposite sides of the release bearing. Each side of one end of the release bearing has a protrusion. Its distinguishing feature is that:

[0009] It also includes a pair of C-type tension springs, each comprising a first straight segment, a curved connecting segment, and a second straight segment connected in sequence.

[0010] Each of the two protrusions has a first positioning hole, and each of the pair of shift fork arms has a second positioning hole;

[0011] A pair of C-type tension springs are connected to the protrusion on the same side of the release bearing through the first straight segment and the first positioning hole, and are also connected to the shift fork arm on the same side of the release bearing through the second straight segment and the second positioning hole, which are used to restrict the rotation of the release bearing around the axis of the release bearing.

[0012] A gap is provided between the opposite end faces of the pair of shift fork arms and the release bearing.

[0013] Furthermore, a pair of C-type tension springs are symmetrically arranged on both sides of the release bearing, with their plane of symmetry passing through the axis of the release bearing.

[0014] Furthermore, the plane of symmetry of a pair of C-type tension springs is defined as the first plane;

[0015] A pair of first positioning holes are symmetrical with respect to the first plane, and the axis of the first positioning holes is parallel to the axis of the release bearing;

[0016] A pair of second positioning holes are symmetrical with respect to the first plane, and the axis of the second positioning holes is perpendicular to the axis of the release bearing;

[0017] The extension direction of the first straight segment is perpendicular to the extension direction of the second straight segment. Each of the two protrusions has a first working surface on one side corresponding to the end of the shift fork arm. The end of the first straight segment away from the first working surface is inserted into the first positioning hole, and the end of the second straight segment away from the end face is inserted into the second positioning hole.

[0018] Furthermore, the plane passing through the axis of the release bearing and perpendicular to the first plane is defined as the second plane, and the axes of the two first positioning holes and the axes of the two second positioning holes are all located in the second plane;

[0019] The extension directions of the first straight segment, the curved connecting segment, and the second straight segment lie within the second plane.

[0020] Furthermore, the curved connecting segment includes a first arc segment, a second arc segment, and a third arc segment connected in sequence;

[0021] The first, second, and third arc segments all curve to the same side, and the connection between the first and second arc segments is tangent, as is the connection between the second and third arc segments.

[0022] The end of the first arc segment away from the second arc segment is connected to one end of the first straight segment, and the connection between the first arc segment and the first straight segment is tangent.

[0023] The end of the third arc segment furthest from the second arc segment connects to one end of the second straight line segment, and the connection point between the third arc segment and the second straight line segment is tangent.

[0024] Furthermore, the radii of the first, second, and third arc segments increase sequentially.

[0025] Furthermore, the first straight segment is clearance-fitted with the first positioning hole, and the second straight segment is clearance-fitted with the second positioning hole.

[0026] Furthermore, a second working surface is provided on the outer peripheral surface of the end of the shift fork arm, and the second working surface is in contact with and cooperates with the first working surface;

[0027] The second working surface is a circular arc surface, and the axis of the second positioning hole is coaxial with the axis of the second working surface.

[0028] Furthermore, the side surface of the release bearing at the position corresponding to the end face is a circular arc surface.

[0029] Furthermore, the gap between the end face and the corresponding side surface ranges from 2.2 to 2.4 mm.

[0030] The advantages of this utility model compared to the prior art are:

[0031] The clutch release device of this utility model has a C-type tension spring that can restrict the rotational movement of the release bearing within a certain range. There is a gap between the end face of the release fork and the side surface of the release bearing, and the side surface of the release bearing is a curved surface, so that the end face of the release fork no longer plays a positioning role during operation and will not come into contact with the release bearing, thus avoiding the problem of the release fork getting stuck due to uneven wear. In addition, the clutch release device of this utility model improves the performance and reliability of the release system by optimizing the structure of the release fork and the release bearing. Moreover, the C-type tension spring is low in cost, easy to install, and occupies little space. Attached Figure Description

[0032] Figure 1This is a front view schematic diagram of an embodiment of the clutch disengagement device of this utility model;

[0033] Figure 2 This is a top view schematic diagram of an embodiment of the clutch disengagement device of this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the release bearing in an embodiment of the clutch release device of this utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the release fork in an embodiment of the clutch release device of this utility model;

[0036] Figure 5 This is a schematic diagram of the structure of a C-type tension spring in an embodiment of a clutch disengagement device according to this utility model.

[0037] The annotations in the attached figures are explained as follows:

[0038] 1-Separation bearing, 11-First working surface, 12-First positioning hole, 13-Side surface, 14-Protrusion part, 2-Separation fork, 21-Fork arm, 22-Second working surface, 23-Second positioning hole, 24-End face, 3-C-type tension spring, 31-First straight segment, 32-First arc segment, 33-Second arc segment, 34-Third arc segment, 35-Second straight segment, 4-Shaft bearing cover. Detailed Implementation

[0039] To make the objectives, advantages and features of this utility model clearer, the clutch disengagement device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In the description of this utility model, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Reference Figure 1 and Figure 2 This utility model discloses a clutch disengagement device, comprising a release bearing 1, a release fork 2, and a pair of C-type tension springs 3. The release bearing 1 is mounted on a shaft bearing cover 4. Figure 2 , Figure 3 and Figure 4As shown, the release bearing 1 has a protrusion 14 on each side near the end of the first bearing cover 4. The two protrusions 14 are symmetrically arranged. One end of the release fork 2 has a pair of fork arms 21. The pair of fork arms 21 are symmetrically arranged, and the ends of the pair of fork arms 21 are located on both sides of the release bearing 1. Each of the two protrusions 14 has a first working surface 11 on one side corresponding to the end of the fork arm 21. A second working surface 22 is provided on the outer circumferential surface of the end of the fork arm 21. The second working surface 22 is a curved surface. The second working surface 22 contacts and cooperates with the first working surface 11. During operation, the second working surface 22 of the fork arm 21 acts on the first working surface 11 of the release bearing 1, causing the release bearing 1 to move axially in the direction of the transmission. A pair of C-type tension springs 3 are symmetrically arranged on both sides of the release bearing 1. The symmetrical plane of the pair of C-type tension springs 3 passes through the axis of the release bearing 1. The symmetrical plane of the pair of C-type tension springs 3 is defined as the first plane. The two protrusions 14 are symmetrical about the first plane, and the pair of fork arms 21 are symmetrical about the first plane.

[0043] A gap is provided between the opposing end faces 24 of the pair of shift fork arms 21 and the release bearing 1. The side surface 13 of the release bearing 1 at the position corresponding to the end face 24 is an arc-shaped surface with a diameter of 82mm, which is a forged blank surface and does not require machining. The distance between the end faces 24 of the pair of shift fork arms 21 is 86.6±0.2mm, and the gap between the end face 24 of the shift fork arm 21 and the corresponding side surface 13 ranges from 2.2 to 2.4mm. The large gap can effectively prevent the end face 24 of the release fork 2 from contacting the release bearing 1 when the release bearing 1 deflects around the axis of the release bearing 1, thus solving the problem of wear on the inner side of the release fork.

[0044] like Figure 2 and Figure 3 As shown, each of the two protrusions 14 is provided with a first positioning hole 12. The two first positioning holes 12 are symmetrical with respect to the first plane, and the axis of the first positioning hole 12 is parallel to the axis of the release bearing 1. The distance between the axis of the first positioning hole 12 and the first plane is 52.7 mm. The plane passing through the axis of the release bearing 1 and perpendicular to the first plane is defined as the second plane. The axes of the two first positioning holes 12 are both located in the second plane. The first positioning holes 12 are through holes, and the diameter of the two first positioning holes 12 is 2.93 mm.

[0045] like Figure 2 and Figure 4As shown, each of the pair of shift fork arms 21 is provided with a second positioning hole 23. The two second positioning holes 23 are symmetrical with respect to the first plane, and the axis of the second positioning hole 23 is perpendicular to the axis of the release bearing 1. The axes of the two second positioning holes 23 are both located in the second plane. The second positioning holes 23 are through holes, and the diameter of the two second positioning holes 23 is 2.93 mm. The axis of the second positioning hole 23 is coaxial with the axis of the second working surface 22, which facilitates machining.

[0046] The C-type tension spring 3 is made of 65Mn, and the diameter of its cross-section perpendicular to its extension direction is 2.8mm. Figure 2 and Figure 5 As shown, the C-type tension spring 3 includes a first straight segment 31, a curved connecting segment, and a second straight segment 35 connected in sequence. The extension directions of the first straight segment 31, the curved connecting segment, and the second straight segment 35 are located in a second plane, and the extension direction of the first straight segment 31 is perpendicular to the extension direction of the second straight segment 35. The curved connecting segment includes a first arc segment 32, a second arc segment 33, and a third arc segment 34 connected in sequence. The first arc segment 32, the second arc segment 33, and the third arc segment 34 all bend to the same side, and the connection point of the first arc segment 32 and the second arc segment 33 is tangent, as is the connection point of the second arc segment 33 and the third arc segment 34. 32. The radii of the second arc segment 33 and the third arc segment 34 are 4.8mm, 11.9mm and 12.7mm respectively. The end of the first arc segment 32 away from the second arc segment 33 is connected to one end of the first straight segment 31, and the connection between the first arc segment 32 and the first straight segment 31 is tangent. The end of the third arc segment 34 away from the second arc segment 33 is connected to one end of the second straight segment 35, and the connection between the third arc segment 34 and the second straight segment 35 is tangent. The length of the first straight segment 31 is designed to be 6.3mm according to the release bearing 1 connected to it, and the length of the second straight segment 35 is designed to be 12.3mm according to the release fork 2 connected to it.

[0047] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the C-type tension spring 3 is connected to the protrusion 14 on the same side via the first straight segment 31, the first positioning hole 12, and the first straight segment 31. The first straight segment 31 is inserted into the first positioning hole 12 at the end away from the first working surface 11. The C-type tension spring 3 is connected to the shift fork arm 21 on the same side via the second straight segment 35, the second positioning hole 23, and the second straight segment 35 is inserted into the second positioning hole 23 at the end away from the end face 24. The C-type tension spring 3 can restrict the rotation of the release bearing 1 around the axis of the release bearing 1 within a certain range. The first straight segment 31 is clearance-fitted with the first positioning hole 12, and the second straight segment 35 is clearance-fitted with the second positioning hole 23, which facilitates installation.

[0048] The clutch release device of this utility model positions the release bearing 1 on a pair of C-type tension springs 3. The C-type tension springs 3 can restrict the rotation of the release bearing 1 around the axis of the release bearing 1 within a certain range. The end face 24 of the release fork 2 no longer plays a positioning role during operation and will not come into contact with the release bearing 1, thereby avoiding the problem of the release fork 2 being worn and stuck.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the specific technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

Claims

1. A clutch release device, comprising a release bearing (1) and a release fork (2), one end of the release fork (2) having a pair of fork arms (21), the ends of the pair of fork arms (21) being located on both sides of the release bearing (1) respectively, and each side of one end of the release bearing (1) being provided with a protrusion (14); characterized in that: a pair of C-shaped tension springs (3) are further included, the C-shaped tension spring (3) comprising a first straight section (31), a curved connecting section and a second straight section (35) connected in sequence; each of the two protrusions (14) is provided with a first positioning hole (12), and each of the pair of fork arms (21) is provided with a second positioning hole (23); the pair of C-shaped tension springs (3) are connected with the protrusions (14) on the same side of the first positioning hole (12) and the first straight section (31) respectively, and are connected with the fork arms (21) on the same side of the second positioning hole (23) and the second straight section (35) respectively, for limiting the rotation of the release bearing (1) about the axis of the release bearing (1); and a gap is provided between the opposite end faces (24) of the pair of fork arms (21) and the release bearing (1).

2. The clutch release device according to claim 1, characterized in that: the pair of C-shaped tension springs (3) are symmetrically arranged on both sides of the release bearing (1), and the symmetry plane passes through the axis of the release bearing (1).

3. The clutch release device according to claim 2, characterized in that: the symmetry plane of the pair of C-shaped tension springs (3) is defined as a first plane; the pair of first positioning holes (12) are symmetrical with respect to the first plane, and the axes of the first positioning holes (12) are parallel to the axis of the release bearing (1); the pair of second positioning holes (23) are symmetrical with respect to the first plane, and the axes of the second positioning holes (23) are perpendicular to the axis of the release bearing (1); the extension direction of the first straight section (31) is perpendicular to the extension direction of the second straight section (35), each of the two protrusions (14) is provided with a first working face (11) on the side corresponding to the end of the fork arm (21), the first straight section (31) is inserted into the first positioning hole (12) from the end of the first positioning hole (12) away from the first working face (11), and the second straight section (35) is inserted into the second positioning hole (23) from the end of the second positioning hole (23) away from the end face (24).

4. The clutch release device according to claim 3, characterized in that: a plane passing through the axis of the release bearing (1) and perpendicular to the first plane is defined as a second plane, and the axes of the two first positioning holes (12) and the axes of the two second positioning holes (23) are located in the second plane; and the extension directions of the first straight section (31), the curved connecting section and the second straight section (35) are located in the second plane.

5. The clutch release device according to claim 4, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The curved connecting section comprises a first circular arc section (32), a second circular arc section (33) and a third circular arc section (34) connected in sequence. The first circular arc section (32), the second circular arc section (33) and the third circular arc section (34) are all curved to the same side, and the connection between the first circular arc section (32) and the second circular arc section (33) is tangent, and the connection between the second circular arc section (33) and the third circular arc section (34) is tangent. One end of the first circular arc section (32) away from the second circular arc section (33) is connected to one end of the first straight section (31), and the connection between the first circular arc section (32) and the first straight section (31) is tangent. One end of the third circular arc section (34) away from the second circular arc section (33) is connected to one end of the second straight section (35), and the connection between the third circular arc section (34) and the second straight section (35) is tangent.

6. The clutch separation device according to claim 5, wherein: The radii of the first circular arc section (32), the second circular arc section (33) and the third circular arc section (34) increase in sequence.

7. The clutch separation device according to claim 3, wherein: The first straight section (31) is in clearance fit with the first positioning hole (12), and the second straight section (35) is in clearance fit with the second positioning hole (23).

8. The clutch separation device according to claim 4, wherein: An end outer circumferential surface of the fork arm (21) is provided with a second working surface (22), and the second working surface (22) is in contact fit with the first working surface (11); The second working surface (22) is a circular arc surface, and the axis of the second positioning hole (23) is coaxial with the axis of the second working surface (22).

9. The clutch separation device according to claim 1, wherein: The side surface (13) of the separation bearing (1) corresponding to the end surface (24) is a circular arc surface.

10. The clutch separation device according to claim 9, wherein: The gap between the end surface (24) and the corresponding side surface (13) is in the range of 2.2-2.4 mm.

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