Axial limiting structure for outer check ring of differential bushing

Abstract

An axial limiting structure for an outer check ring of a differential bushing comprises the bushing, bushing rubber is arranged on the outer wall of the bushing, a connecting plate is fixedly connected to the right end of the bushing, a control plate is fixedly connected to the left end of the bushing, a guide cylinder is fixedly connected into the connecting plate and the control plate, an installation cylinder is slidably connected into the guide cylinder, and a rotating ring is rotatably connected to the middle of the guide cylinder. The rotating ring is provided with an annular groove, guide grooves are formed in the left side wall and the right side wall of the annular groove respectively, a sliding groove is formed in the middle of the lining, a brake plate is arranged in the sliding groove, a moving rod is fixedly connected to the inner arc face of the brake plate, a guide column is arranged on the moving rod and can be inserted into the guide groove, and a receding groove is formed in the control plate. An annular disc is rotationally connected into the receding groove, a traction rod is slidably connected to the side wall of the control plate, a supporting plate is arranged on the traction rod, a connecting groove is formed in the bushing rubber, and the right end of the supporting plate is inserted into the connecting groove; the axial limiting of the bushing can be realized, the service life of the bushing is prolonged, and the mounting is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of differential bushings, and in particular to an axial limiting structure of an outer retaining ring of a differential bushing. Background Art

[0002] The automobile differential is an important component of the automobile transmission system. Its main function is to make the left and right wheels roll at different speeds when the car is turning or driving on uneven roads, thereby ensuring that the driving wheels on both sides perform pure rolling motion, thereby ensuring the driving stability of the vehicle. Three bushing mounting holes are opened on the rear subframe of the car. Among the three bushing mounting holes, two bushing mounting holes are located at the back and one bushing mounting hole is located at the front. A differential bushing is installed in the bushing mounting hole of each rear subframe of the car. The differential is connected to the differential bushing by bolts. The function of the differential bushing is to isolate the vibration between the body and the differential through the energy absorption of the rubber element, so as to obtain better ride comfort and durability.

[0003] Chinese patent (CN210265747U) discloses an axial limiting structure of an outer retaining ring of a differential bushing, comprising an inner frame, a rubber part and an outer frame, wherein the inner frame is provided with two upper and lower outer retaining rings, retaining rings extend from the edges of both sides of the outer retaining rings, and the edges of the retaining rings are provided with arms facing the other retaining rings, and the two arms of the two retaining rings abut against each other, and the rubber part wraps the outer retaining rings, the retaining rings and the arms inside, and the retaining rings are received inside by shrinking the ends of the outer frame, and the outer retaining rings are provided to solve the problem of collision between internal components of the automobile caused by excessive axial braking force on the differential bushing, and optimize the structure of the differential bushing.

[0004] In the above patent, although the outer retaining ring and the support arm can be used to axially limit the bushing, the retaining ring and the support arm are the internal structure of the bushing, and the axial force on the bushing will be transmitted to the bushing rubber, which will aggravate the wear of the bushing rubber over time and affect the service life of the bushing. In addition, the axial limiting effect of the internal structure is poor, and there is still the problem of collision of the differential component structure. In addition, during the installation of the bushing, the rubber at both ends of the bushing needs to be squeezed to make it elastically deformed and the bushing needs to be installed in the mounting hole, which makes it inconvenient to operate when installing the bushing.

[0005] Therefore, the present invention provides an axial limiting structure of an outer retaining ring of a differential bushing to solve the above-mentioned problem. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an axial limiting structure of a differential bushing outer retaining ring, which solves the problems of poor axial limiting effect of the differential bushing, easy wear of the bushing rubber, and inconvenient installation of the differential bushing rubber.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A differential bushing outer retaining ring axial limit structure, comprising a left and right axial and cylindrical bushing, annular bushing rubbers are fixedly connected to the left and right sides of the bushing outer wall respectively, an annular connecting plate is fixedly connected to the right end of the bushing, an annular control plate is fixedly connected to the left end of the bushing, a guide cylinder coaxial with the bushing is fixedly connected in the connecting plate and the control plate, a mounting cylinder is slidably connected in the guide cylinder, and the mounting cylinder can be restricted when it shakes left and right, a swivel is rotatably connected to the middle of the guide cylinder, and the swivel can rotate with the movement of the mounting cylinder, an annular groove with an opening facing outward is opened on the swivel, and guide grooves are opened on the left and right side walls of the annular groove respectively, and the guide grooves are composed of four M-shaped grooves, and every two adjacent M-shaped grooves are connected to each other, and the openings of the two guide grooves are opposite; The middle part of the bushing is provided with a plurality of sliding grooves corresponding to the M-shaped grooves one by one, an arc-shaped brake plate is provided in the sliding groove, a moving rod is fixedly connected to the inner arc surface of the brake plate, and a left and right axial guide column is provided at one end of the moving rod close to the center of the bushing, and the left and right sides of the guide column are respectively inserted into the guide grooves on the corresponding sides, a yield groove is provided in the control plate, and an annular disk is rotatably connected in the yield groove, a plurality of traction rods are slidably connected to the side wall of the control plate, and the plurality of traction rods can move relative to or opposite to each other as the annular disk rotates, and one end of the traction rod away from the center of the bushing penetrates the control plate and is fixedly connected to an arc-shaped support plate, a plurality of connection grooves evenly distributed along the circumferential direction and corresponding to the support plates are provided on the two bushing rubbers, and the right end of the support plate is inserted into the connection groove on the corresponding side.

[0008] Preferably, the guide cylinder is provided with sliding grooves in left and right directions on the front and rear sides respectively, and two groups of front and rear opposite sliding blocks are fixedly connected on the left and right sides of the mounting cylinder respectively, the sliding blocks are slidably connected to the sliding grooves on their corresponding sides, and a rocker arm is hinged on the sliding block, and each group of two front and rear opposite rocker arms are distributed in an eight-shaped shape, and a buffer cylinder is hinged at the free end of the rocker arm, and a fixed column is slidably connected inside the buffer cylinder, and the free end of the fixed column is fixedly connected to the inner wall of the bushing, and the free end of the fixed column is connected to the side wall of the buffer cylinder via a first spring, and each group of two front and rear opposite sliding blocks is fixedly connected with a retaining ring.

[0009] Preferably, the retaining ring on the left side is connected to the right side wall of the control plate via a plurality of second springs, and the retaining ring on the right side is fixedly connected to the connecting plate via a third spring.

[0010] Preferably, the distance from the inflection point in the middle of the M-shaped groove to the center of the bushing is the smallest, and the distance from the middle of the M-shaped groove to the center of the bushing gradually increases in the process of extending toward both ends.

[0011] Preferably, a V-shaped rotation groove is provided on the inner arc surface of the rotating ring, and a plug column inserted into the rotation groove is fixedly connected to the front end of the mounting tube.

[0012] Preferably, the annular disk is provided with a plurality of traction grooves evenly distributed along its circumferential direction and opening to the right, the traction groove is arc-shaped, one end of the traction rod facing the center of the bushing extends into the give way groove and is provided with a sliding column inserted into the traction groove.

[0013] Preferably, the annular disk is connected to the side wall of the give way slot via a torsion spring, a through slot opening to the left and coaxial with the annular disk is provided on the left side wall of the control plate, and a push plate extending out of the through slot is fixedly connected to the left end of the annular disk.

[0014] Preferably, arc-shaped protective plates are fixedly connected to the upper and lower sides of the right end of the bushing, and a plurality of brake grooves opening outward are formed on the brake plate.

[0015] The beneficial effects of the present invention are: 1. Through the coordinated use of the bushing, the connecting plate, the guide cylinder, the mounting cylinder, the slider, the retaining ring, the rocker arm, the buffer cylinder and the first spring, when the differential drives the mounting cylinder to shake in the left and right axial directions, the mounting cylinder can drive the slider to move, causing the rocker arm to swing, and the rocker arm can drive the buffer cylinder to move in the front and rear directions, so that the left and right axial forces are converted into the front and rear directions, and the shaking amplitude is weakened by the action of the buffer cylinder and the first spring. At the same time, the retaining ring can drive the second spring and the third spring to deform when moving, thereby further weakening the axial force.

[0016] 2. Through the coordinated use of the swivel, rotating groove, ring groove, guide groove, M-shaped groove, brake plate, brake groove, moving rod and guide column, when the differential shakes, the mounting tube drives the plug column to move in the rotating groove, causing the swivel to rotate, and the swivel drives the M-shaped groove to rotate, causing the moving rod to move in the direction away from the center of the bushing. The moving rod can drive the brake plate to contact the mounting hole, thereby increasing the friction between the brake plate and the mounting hole, weakening the axial force on the bushing, reducing the wear on the bushing rubber and extending the service life.

[0017] 3. Through the coordinated use of the control plate, the clearance groove, the annular disc, the torsion spring, the traction groove, the push plate, the traction rod and the support plate, when installation is required, the push plate is rotated to rotate the annular disc. The annular disc drives multiple support plates to compress the bushing rubber from multiple angles through the traction groove and the traction rod, so that the volume of the bushing rubber is reduced, which is convenient for disassembly or installation of the bushing, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an axonometric drawing of the present invention.

[0019] Figure 2 It is a full-section main axonometric drawing of the present invention.

[0020] Figure 3 It is a cutaway top axonometric view of the present invention.

[0021] Figure 4 It is a full-section right-view axonometric view of the present invention.

[0022] Figure 5 It is a cutaway right axonometric view of the present invention.

[0023] Figure 6 It is a cutaway main axonometric view of the present invention.

[0024] Figure 7 It is a left axonometric view of the present invention.

[0025] Figure 8 It is a parts diagram of the swivel ring in the present invention.

[0026] In the figure: 1. bushing; 2. bushing rubber; 3. connecting plate; 4. control plate; 5. guide cylinder; 6. mounting cylinder; 7. swivel; 8. ring groove; 9. M-shaped groove; 10. brake plate; 11. moving rod; 12. guide column; 13. give way groove; 14. annular disk; 15. traction rod; 16. support plate; 17. slide groove; 18. slider; 19. rocker arm; 20. buffer cylinder; 21. fixed column; 22. first spring; 23. retaining ring; 24. second spring; 25. third spring; 26. rotating groove; 27. plug column; 28. traction groove; 29. ​​slide column; 30. torsion spring; 31. push plate; 32. protective plate; 33. brake groove. DETAILED DESCRIPTION

[0027] The following will refer to Figure 1-Figure 8 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0028] A differential bushing outer retaining ring axial limiting structure, such as Figure 1-Figure 8 As shown, it includes a left and right axial and cylindrical bushing 1, and an annular bushing rubber 2 is fixedly connected to the left and right sides of the outer wall of the bushing 1, and an annular connecting plate 3 is fixedly connected to the right end of the bushing 1, and an annular control plate 4 is fixedly connected to the left end of the bushing 1. A guide cylinder 5 coaxial with the bushing 1 is fixedly connected in the connecting plate 3 and the control plate 4, and a mounting cylinder 6 is slidably connected in the guide cylinder 5. When the mounting cylinder 6 shakes left and right, it can be restricted. A swivel 7 is rotatably connected to the middle part of the guide cylinder 5, and the swivel 7 can rotate with the movement of the mounting cylinder 6. The swivel 7 is provided with an annular groove 8 with an opening facing outward, and guide grooves are opened on the left and right side walls of the annular groove 8, respectively. The guide groove consists of four M-shaped grooves 9, and every two adjacent M-shaped grooves 9 are connected to each other, and the openings of the two guide grooves are opposite. The middle part of the bushing 1 is provided with a plurality of sliding grooves corresponding to the M-shaped grooves 9, and an arc-shaped brake plate 10 is provided in the sliding groove. A moving rod 11 is fixedly connected to the inner arc surface of the brake plate 10, and a left and right axial guide column 12 is provided at one end of the moving rod 11 close to the center of the bushing 1. The left and right sides of the guide column 12 are respectively inserted into the guide grooves on the corresponding sides. A clearance groove 13 is provided in the control plate 4, and an annular disk 14 is rotatably connected in the clearance groove 13. A plurality of traction rods 15 are slidably connected to the side wall of the control plate 4, and the plurality of traction rods 15 can move relative to or opposite to each other as the annular disk 14 rotates. The end of the traction rod 15 away from the center of the bushing 1 penetrates the control plate 4 and is fixedly connected to an arc-shaped support plate 16. A plurality of connecting grooves evenly distributed along the circumferential direction and corresponding to the support plate 16 are provided on the two bushing rubbers 2, and the right end of the support plate 16 is inserted into the connecting groove on the corresponding side.

[0029] like Figure 3 As shown, the guide cylinder 5 is provided with slide grooves 17 in left and right directions on the front and rear sides respectively, and the installation cylinder 6 is fixedly connected with two groups of front and rear opposite sliders 18 on the left and right sides respectively. The sliders 18 are slidably connected to the slide grooves 17 on the corresponding sides, and a swing rod 19 is hinged on the slider 18. Each group of two front and rear opposite swing rods 19 are distributed in an eight-shaped shape. A buffer cylinder 20 is hinged on the free end of the swing rod 19. A fixed column 21 is slidably connected in the buffer cylinder 20. The free end of the fixed column 21 is fixedly connected to the inner wall of the bushing 1, and the free end of the fixed column 21 is connected to the side wall of the buffer cylinder 20 via a first spring 22. Each group of two front and rear sliders 18 is fixedly connected with a retaining ring 23; when the guide cylinder 5 slides left and right, the guide cylinder 5 drives the retaining ring 23 on the corresponding side to move through the slider 18, and the retaining ring 23 drives the buffer cylinder 20 to compress the first spring 22 through the swing rod 19, which can relieve the axial force of the installation cylinder 6 and reduce the sliding amplitude of the installation cylinder 6.

[0030] like Figure 3 As shown, the retaining ring 23 on the left is connected to the right side wall of the control board 4 via multiple second springs 24, and the retaining ring 23 on the right is fixedly connected to the connecting plate 3 via a third spring 25; when the mounting tube 6 drives the retaining ring 23 on the left to move left and right via the slider 18, the second spring 24 can control the moving position of the retaining ring 23 on the left to facilitate its reset, and when the retaining ring 23 on the right moves left and right, the third spring 25 can control the movement and reset of the retaining ring 23 on the right, thereby limiting the moving range of the mounting tube 6 to prevent the mounting tube 6 from shaking too much left and right.

[0031] like Figure 4As shown, the distance from the inflection point in the middle of the M-shaped groove 9 to the center of the bushing 1 is the smallest, and the distance from the middle of the M-shaped groove 9 to the center of the bushing 1 gradually increases in the process of extending toward both ends; when the swivel 7 drives the guide groove and the M-shaped groove 9 to rotate, the M-shaped groove 9 can drive the moving rod 11 to move via the guide column 12, and the moving rod 11 can drive the brake plate 10 to contact the mounting hole, thereby increasing the friction between the brake plate 10 and the mounting hole, performing external axial limitation on the mounting cylinder 6, and making the braking effect more effective.

[0032] like Figure 3 , Figure 4 and Figure 8 As shown, a V-shaped rotation groove 26 is opened on the inner arc surface of the rotating ring 7, and a plug post 27 inserted into the rotation groove 26 is fixedly connected to the front end of the installation tube 6; when the installation tube 6 drives the plug post 27 to move right in the rotation groove 26, the rotating ring 7 rotates counterclockwise, and when the installation tube 6 drives the plug post 27 to move left in the rotation groove 26, the rotating ring 7 rotates clockwise.

[0033] like Figure 5 and Figure 6 As shown, the annular disk 14 is provided with a plurality of traction grooves 28 which are evenly distributed along its circumferential direction and open to the right, the traction grooves 28 are arc-shaped, and the end of the traction rod 15 facing the center of the bushing 1 extends into the give way groove 13 and is provided with a sliding post 29 inserted into the traction groove 28; when the annular disk 14 rotates counterclockwise, the annular disk 14 drives the traction groove 28 to rotate counterclockwise, so that the sliding post 29 drives the traction rod 15 to move toward the center of the bushing 1, and when the annular disk 14 rotates clockwise, the annular disk 14 drives the traction groove 28 to rotate clockwise, so that the sliding post 29 drives the traction rod 15 to move away from the center of the bushing 1, and the traction rod 15 can drive the support plate 16 to move, thereby achieving the purpose of compressing the bushing rubber 2 from all angles, which is convenient for the installation of the bushing 1.

[0034] like Figure 2 and Figure 7 As shown, the annular disk 14 is connected to the side wall of the give way groove 13 via a torsion spring 30, a through groove with an opening facing left and coaxial with the annular disk 14 is opened on the left side wall of the control plate 4, and a push plate 31 extending out of the through groove is fixedly connected to the left end of the annular disk 14; when the push plate 31 is pushed, the push plate 31 can drive the annular disk 14 to rotate, and the annular disk 14 stretches the torsion spring 30. When the external force of the push plate 31 disappears, the annular disk 14 can be reset under the action of the torsion spring 30.

[0035] like Figure 1 and Figure 4As shown, arc-shaped protective plates 32 are fixedly connected to the upper and lower sides of the right end of the bushing 1, and a plurality of outward-facing brake grooves 33 are provided on the brake plate 10; the protective plate 32 can protect the mounting tube 6 and the mounting bolts, and the brake grooves 33 can increase the friction between the brake plate 10 and the mounting hole, so as to achieve a better axial limiting effect.

[0036] When the present invention is in use, it is necessary to first install the bushing 1 so that the bushing 1 and the mounting hole are assembled, and the push plate 31 is pushed to rotate counterclockwise, which drives the annular disk 14 to rotate counterclockwise, and the annular disk 14 drives multiple traction grooves 28 to rotate counterclockwise, so that the sliding column 29 drives the traction rod 15 to move toward the center of the bushing 1, and the traction rod 15 drives the support plate 16 to move toward the center of the bushing 1. The support plate 16 drives the bushing rubber 2 to elastically deform toward the center of the bushing 1 through the connecting groove, so that the multiple support plates 16 compress the bushing rubber 2 from multiple angles, so that the volume of the two bushing rubbers 2 is reduced. At this time, the bushing 1 is placed in the mounting hole, which is convenient for installing the bushing 1, saving time and effort.

[0037] When the bushing 1 is completely placed in the mounting hole, the push plate 31 is released, and the annular disk 14 rotates clockwise under the force of the torsion spring 30, and the annular disk 14 drives the traction groove 28 to rotate clockwise, so that the sliding column 29 drives the traction rod 15 to move in the direction away from the center of the bushing 1, and the traction rod 15 drives the support plate 16 to move in the direction away from the center of the bushing 1, and the support plate 16 no longer squeezes the bushing rubber 2, and the bushing rubber 2 expands to its original size, so that the bushing rubber 2 and the mounting hole are interference-fitted, so that the bushing 1 and the mounting hole are fixed; Then, bolts are used to fix the differential and the mounting cylinder 6. When the vehicle body shakes, the differential will shake. When the differential drives the mounting cylinder 6 to move to the left, the mounting cylinder 6 drives the retaining ring 23 on the left to move to the left and compress the second spring 24. At the same time, the retaining ring 23 on the left drives the two rocking rods 19 on the left to swing away from each other through the slider 18. The two rocking rods 19 on the left drive the two buffer cylinders 20 to move away from each other and compress the first spring 22. At the same time, the retaining ring 23 on the right moves to the left and stretches the third spring 25. The retaining ring 23 on the right drives the two rocking rods 19 on the right to swing relative to each other. The two rocking rods 19 on the right drive the two buffer cylinders 20 on the right to swing relative to each other and stretch the first spring 22. Under the action of the first spring 22, the second spring 24 and the third spring 25, the force on the mounting cylinder 6 in the left and right axial directions is weakened, the amplitude of the left and right shaking of the mounting cylinder 6 is reduced, and the amplitude of the left and right shaking of the differential is reduced synchronously.

[0038] Similarly, when the differential drives the mounting cylinder 6 to move to the right, the mounting cylinder 6 drives the retaining ring 23 on the left to move to the right and stretch the second spring 24. At the same time, the retaining ring 23 on the left drives the two rocking rods 19 on the left to swing relative to each other through the slider 18. The two rocking rods 19 on the left drive the two buffer cylinders 20 to move relative to each other and stretch the first spring 22. At the same time, the retaining ring 23 on the right moves to the right and compresses the third spring 25. The retaining ring 23 on the right drives the two rocking rods 19 on the right to swing away from each other. The two rocking rods 19 on the right drive the two buffer cylinders 20 on the right to swing away from each other and compress the first spring 22. Under the action of the first spring 22, the second spring 24 and the third spring 25, the force on the mounting cylinder 6 in the left and right axial directions is weakened, the amplitude of the left and right shaking of the mounting cylinder 6 is reduced, and the amplitude of the left and right shaking of the differential is reduced synchronously.

[0039] When the differential drives the mounting tube 6 to move to the left, the mounting tube 6 drives the plug post 27 to move to the left in the rotating groove 26. Under the joint force of the plug post 27 and the rotating groove 26, the swivel 7 rotates clockwise, and the swivel 7 drives the guide groove to rotate clockwise, so that the guide post 12 slides in the M-shaped groove 9 in the guide groove. The guide post 12 slides from the initial turning point of the M-shaped groove 9 to the two ends of the M-shaped groove 9, and the distance between the guide post 12 and the center of the bushing 1 gradually increases. The guide post 12 drives the moving rod 11 and the brake plate 10 to move in the direction away from the center of the bushing 1, so that multiple brake plates 10 contact the side wall of the mounting hole, thereby increasing the friction between the brake plate 10 and the mounting hole, and further weakening the external force on the bushing 1 in the left and right axial directions.

[0040] When the differential drives the mounting tube 6 to move to the right, the mounting tube 6 drives the plug post 27 to move to the right in the rotating groove 26. Under the joint force of the plug post 27 and the rotating groove 26, the swivel 7 rotates counterclockwise, and the swivel 7 drives the guide groove to rotate counterclockwise, so that the guide post 12 slides in the M-shaped groove 9. The guide post 12 slides from the initial turning point of the M-shaped groove 9 to the two ends of the M-shaped groove 9. The distance between the guide post 12 and the center of the bushing 1 gradually increases. The guide post 12 drives the moving rod 11 and the brake plate 10 to move in a direction away from the center of the bushing 1, so that multiple brake plates 10 contact the side walls of the mounting hole, increasing the friction between the brake plate 10 and the mounting hole, and further weakening the external force on the bushing 1 in the left and right axial directions. Due to the presence of the support plate 16, the annular disk 14 and the torsion spring 30, the bushing rubber 2 can be supported and buffered, thereby reducing the wear on the bushing rubber 2 and extending the service life of the bushing 1.

[0041] When the bushing 1 needs to be removed, the push plate 31 is pushed to rotate counterclockwise, which drives the annular disk 14 to rotate counterclockwise, and the annular disk 14 drives the multiple traction grooves 28 to rotate counterclockwise, so that the sliding column 29 drives the traction rod 15 to move toward the center of the bushing 1, and the traction rod 15 drives the support plate 16 to move toward the center of the bushing 1. The support plate 16 drives the bushing rubber 2 to elastically deform toward the center of the bushing 1 through the connecting groove, so that the multiple support plates 16 compress the bushing rubber 2 from multiple angles, so that the volume of the two bushing rubbers 2 is reduced. At this time, the bushing 1 can be easily taken out from the mounting hole, which is more convenient to disassemble the bushing 1, saving time and effort.

[0042] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A differential bushing outer retaining ring axial limit structure, comprising a left and right axial and cylindrical bushing (1), characterized in that: An annular bushing rubber (2) is fixedly connected to the left and right sides of the outer wall of the bushing (1), an annular connecting plate (3) is fixedly connected to the right end of the bushing (1), and an annular control plate (4) is fixedly connected to the left end of the bushing (1). A guide cylinder (5) coaxial with the bushing (1) is fixedly connected inside the connecting plate (3) and the control plate (4), and a mounting cylinder (6) is slidably connected inside the guide cylinder (5). When the mounting cylinder (6) shakes left and right, it can be restricted. A rotating ring (7) is rotatably connected to the middle of the guide cylinder (5), and the rotating ring (7) can rotate with the movement of the mounting cylinder (6). An annular groove (8) with an opening facing outward is opened on the rotating ring (7), and guide grooves are opened on the left and right side walls of the annular groove (8). The guide grooves are composed of four M-shaped grooves (9), and every two adjacent M-shaped grooves (9) are connected to each other, and the openings of the two guide grooves are opposite to each other. The bushing (1) has a plurality of sliding grooves corresponding to the M-shaped grooves (9) in the middle thereof, and an arc-shaped brake plate (10) is arranged in the sliding groove. A moving rod (11) is fixedly connected to the inner arc surface of the brake plate (10). The moving rod (11) has left and right axial guide columns (12) at one end close to the center of the bushing (1). The left and right sides of the guide columns (12) are respectively inserted into the guide grooves on the corresponding sides thereof. A clearance groove (13) is arranged in the control plate (4), and an annular disk is rotatably connected in the clearance groove (13). (14), a plurality of traction rods (15) are slidably connected to the side wall of the control plate (4), and the plurality of traction rods (15) can move relative to or opposite to each other as the annular disk (14) rotates. One end of the traction rod (15) away from the center of the bushing (1) penetrates the control plate (4) and is fixedly connected to an arc-shaped support plate (16). The two bushing rubbers (2) are provided with a plurality of connection grooves evenly distributed along the circumferential direction thereof and corresponding to the support plates (16) one by one, and the right end of the support plate (16) is inserted into the connection groove on the corresponding side thereof.

2. The differential bushing outer retaining ring axial limiting structure according to claim 1, characterized in that: The guide cylinder (5) is provided with slide grooves (17) in left and right directions on both front and rear sides, respectively. Two groups of front and rear opposing slide blocks (18) are fixedly connected to the left and right sides of the mounting cylinder (6), respectively. The slide blocks (18) are slidably connected to the slide grooves (17) on the corresponding sides thereof. A swing rod (19) is hingedly connected to the slide block (18), and each group of front and rear opposing two swing rods (19) are distributed in an eight-shaped shape. A buffer cylinder (20) is hingedly connected to the free end of the swing rod (19), and a fixed column (21) is slidably connected inside the buffer cylinder (20). The free end of the fixed column (21) is fixedly connected to the inner wall of the bushing (1), and the free end of the fixed column (21) is connected to the side wall of the buffer cylinder (20) via a first spring (22). A retaining ring (23) is fixedly connected to each group of front and rear opposing two slide blocks (18).

3. The differential bushing outer retaining ring axial limiting structure according to claim 2, characterized in that: The retaining ring (23) on the left side is connected to the right side wall of the control plate (4) via a plurality of second springs (24), and the retaining ring (23) on the right side is fixedly connected to the connecting plate (3) via a third spring (25).

4. The differential bushing outer retaining ring axial limiting structure according to claim 1, characterized in that: The distance from the inflection point in the middle of the M-shaped groove (9) to the center of the bushing (1) is the smallest, and the distance from the middle of the M-shaped groove (9) to the center of the bushing (1) gradually increases as the middle of the M-shaped groove (9) extends toward both ends.

5. The differential bushing outer retaining ring axial limiting structure according to claim 1, characterized in that: A V-shaped rotation groove (26) is provided on the inner arc surface of the rotating ring (7), and a plug post (27) inserted into the rotation groove (26) is fixedly connected to the front end of the mounting tube (6).

6. The differential bushing outer retaining ring axial limiting structure according to claim 1, characterized in that: The annular disk (14) is provided with a plurality of traction grooves (28) evenly distributed along its circumferential direction and opening to the right, the traction grooves (28) being arc-shaped, one end of the traction rod (15) facing the center of the bushing (1) extending into the clearance groove (13) and provided with a sliding column (29) inserted into the traction groove (28).

7. The differential bushing outer retaining ring axial limiting structure according to claim 1, characterized in that: The annular disk (14) is connected to the side wall of the clearance groove (13) via a torsion spring (30); a through groove with an opening facing left and coaxial with the annular disk (14) is provided on the left side wall of the control plate (4); a push plate (31) extending out of the through groove is fixedly connected to the left end of the annular disk (14).

8. The differential bushing outer retaining ring axial limiting structure according to claim 1, characterized in that: The upper and lower sides of the right end of the bushing (1) are respectively fixedly connected with arc-shaped protective plates (32), and the brake plate (10) is provided with a plurality of brake grooves (33) opening outwards.

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