A rear shock absorber with adjustable damping stiffness

Abstract

This application relates to the field of shock absorber technology and discloses a rear shock absorber with adjustable damping stiffness, comprising a first cylinder, a second cylinder, and a motor, wherein: the first cylinder has an opening at one end away from the second cylinder, and a cover plate is provided at the opening; a lifting tube is provided inside the first cylinder, the lifting tube is located above a placement seat inside the first cylinder, and the lifting tube can move along the axial direction of the first cylinder; the motor is placed on the placement seat; the motor is connected to the lifting tube through a connector. This application has the effect of facilitating the removal of the motor from the shock absorber.

Description

Technical Field

[0001] This application relates to the field of shock absorber technology, and in particular to a rear shock absorber with adjustable damping stiffness. Background Technology

[0002] A shock absorber, also called a vibration damper, is a component that rapidly dampens vehicle vibrations, playing a crucial role in improving the smoothness and comfort of a ride. The following is an introduction to the structure and working principle of a type of adjustable rear shock absorber:

[0003] An adjustable rear shock absorber mainly consists of a first cylinder, a second cylinder, and a motor. The first and second cylinders are coaxial, with the second cylinder slidingly fitted onto the outside of the first cylinder in a sealed manner. Inside the first cylinder is a mounting seat, on which a threaded rod coaxial with the first cylinder is mounted, the threaded rod and the mounting seat having a rotatable engagement. A rectangular groove is machined into the top of the threaded rod. The motor is placed on the mounting seat, and its shaft has a rectangular protrusion that engages with the groove, allowing the motor to drive the threaded rod to rotate.

[0004] The first cylinder also houses a piston, which slides along the axis of the first cylinder. A threaded rod passes through the piston and is threadedly connected to it. A spring is installed inside the second cylinder; one end of the spring abuts against the end of the second cylinder, and the other end connects to the piston. Furthermore, the second cylinder is filled with damping oil.

[0005] When it is necessary to adjust the stiffness of the shock absorber, the motor drives the threaded rod to rotate. During the rotation of the threaded rod, the piston moves along the axis of the first cylinder, thereby changing the preload of the spring and thus adjusting the stiffness of the shock absorber.

[0006] However, when it is necessary to disassemble the motor, the conventional procedure is to remove it from the opening of the first cylinder. But directly tilting the motor can easily cause the damping oil inside the second cylinder to spill out as well, resulting in oil waste and contamination. On the other hand, handling the motor by hand is inconvenient due to the small distance between the motor and the inner wall of the first cylinder, which undoubtedly affects the efficiency of disassembling the motor. Utility Model Content

[0007] To facilitate the removal of the motor from the shock absorber, this application provides a rear shock absorber with adjustable damping stiffness.

[0008] The rear shock absorber with adjustable damping stiffness provided in this application adopts the following technical solution:

[0009] A rear shock absorber with adjustable damping stiffness includes a first cylinder, a second cylinder, and a motor, wherein:

[0010] The first cylinder has an opening at the end away from the second cylinder, and a cover plate is provided at the opening;

[0011] The first cylinder is provided with a lifting tube, which is located above the placement seat inside the first cylinder and can move along the axial direction of the first cylinder.

[0012] The motor is placed on the mounting base;

[0013] The motor is connected to the riser tube via a connector.

[0014] Optionally, the outer wall of the riser tube is threadedly connected to the inner wall of the first cylinder.

[0015] The top of the riser tube is provided with a rotating ring;

[0016] The rotating ring is provided with multiple insertion interfaces.

[0017] Optionally, the cover plate is provided with a plurality of plug-in rods;

[0018] The plug rod is inserted into the plug interface.

[0019] Optionally, a positioning port is provided on the side wall of the plug-in rod;

[0020] The rotating ring and the positioning port are inserted into each other.

[0021] Optionally, the connector is provided with an abutment member;

[0022] The lifting pipe is equipped with a lifting ring;

[0023] The top of the lifting ring and the bottom of the abutment are in contact.

[0024] Optionally, the connector includes a clamping plate and a connecting bolt;

[0025] The clamping plates are provided in pairs, and the pair of clamping plates clamp the motor;

[0026] Both ends of the clamping piece are provided with connecting pieces;

[0027] The connecting bolt passes through adjacent connecting pieces on a pair of clamping pieces;

[0028] A connecting nut is threaded onto the connecting bolt;

[0029] The bolt head of the connecting bolt and the connecting nut clamp a pair of adjacent connecting plates on the clamping plates.

[0030] Optionally, the connecting piece and the clamping piece are perpendicular;

[0031] The bolt head of the connecting bolt acts as the abutment and contacts the top of the lifting ring.

[0032] Optionally, the outer wall of the motor is provided with an elastic gasket;

[0033] The clamping piece and the elastic pad are in contact.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. The design of the lifting tube makes the installation and removal of the motor more convenient. When placing the motor, the lifting tube positions the motor to ensure its stability; when it is necessary to remove the motor, the plug-in rod on the cover plate cooperates with the plug interface of the rotating ring, and rotating the cover plate will move the lifting tube, thus facilitating the removal of the motor and reducing the difficulty of maintenance and repair.

[0036] 2. The connecting parts are designed to securely clamp the motor, ensuring its stability during operation. Elastic pads are placed between the clamping plates and the motor, increasing friction to prevent loosening and providing cushioning protection, reducing damage from the clamping and extending the motor's lifespan. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0038] Figure 2 This is a schematic diagram illustrating the relative positions of the motor and the riser tube in an embodiment of this application.

[0039] Figure 3 This is a schematic diagram illustrating the relative positions of the first cylinder and the riser in an embodiment of this application.

[0040] Figure 4 This is a schematic diagram illustrating the connector structure in an embodiment of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. First cylinder; 11. Opening; 12. Cover plate; 121. Insert rod; 122. Positioning port; 2. Lifting pipe; 21. Rotating ring; 211. Insertion interface; 22. Lifting ring; 3. Connecting piece; 31. Clamping plate; 311. Connecting plate; 32. Connecting bolt; 321. Connecting nut; 4. Elastic washer; 5. Motor; 6. Placement seat. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0044] This application discloses a rear shock absorber with adjustable damping stiffness.

[0045] An adjustable rear shock absorber includes a first cylinder 1, a second cylinder, and a motor 5. The first and second cylinders are coaxial, with the second cylinder slidably fitted onto the outside of the first cylinder 1. A mounting seat 6 is located inside the first cylinder 1, and a threaded rod coaxial with the first cylinder 1 is mounted on the mounting seat 6. The threaded rod rotatably engages with the mounting seat 6, and a rectangular groove is provided at the top of the threaded rod. The motor 5 is placed on the mounting seat 6, and a rectangular protrusion is provided on the motor shaft of the motor 5. The protrusion and the groove are interlocked, and the motor 5 drives the threaded rod to rotate. A piston is located inside the first cylinder 1, and the piston slidably engages with the first cylinder 1 along its axial direction. The threaded rod passes through the piston and is threadedly connected to it. A spring is located inside the second cylinder, and damping oil is also provided inside the second cylinder. One end of the spring contacts the end of the second cylinder, and the other end contacts the piston.

[0046] When it is necessary to adjust the stiffness of the shock absorber, the motor 5 drives the threaded rod to rotate. The rotation of the threaded rod drives the piston to move in the axial direction of the first cylinder 1, thereby adjusting the preload of the spring and thus adjusting the stiffness of the shock absorber.

[0047] The first cylinder 1 has an opening 11 at the end away from the second cylinder to facilitate the placement of the motor 5. In order to improve the stability of the placement of the motor 5, a cover plate 12 is provided at the opening 11 of the first cylinder 1. After the motor 5 is placed on the placement seat 6, the cover plate 12 and the top of the motor 5 are in contact.

[0048] The first cylinder 1 is equipped with a lifting pipe 2. The motor 5 is placed inside the lifting pipe 2. A connector 3 is provided between the motor 5 and the lifting pipe 2. The motor 5 is connected to the lifting pipe 2 through the connector 3. The lifting pipe 2 can move inside the first cylinder 1 along the axial direction of the first cylinder 1.

[0049] When placing the motor 5, the lifting pipe 2 is placed inside the first cylinder 1 beforehand. Then, the motor 5 is placed inside the lifting pipe 2 and makes contact with the placement seat 6. During the placement of the motor 5, the lifting pipe 2 positions the motor 5, improving the stability of the placement.

[0050] The outer wall of the lifting pipe 2 is threaded to the inner wall of the first cylinder 1. When the lifting pipe 2 needs to move in the axial direction of the first cylinder 1, the lifting pipe 2 can be rotated inside the first cylinder 1.

[0051] A rotating ring 21 is coaxially provided on the top of the inner wall of the lifting tube 2. When the motor 5 is placed, the motor 5 is placed inside the rotating ring 21, and the inner wall of the rotating ring 21 positions the motor 5.

[0052] The top of the rotating ring 21 is provided with multiple insertion ports 211, which are evenly distributed circumferentially along the axis of the rotating ring 21. The insertion ports 211 penetrate through the bottom of the rotating ring 21. In this embodiment, there are two insertion ports 211.

[0053] The cover plate 12 is provided with a plurality of plug rods 121, which are evenly distributed circumferentially along the axial direction of the cover plate 12. In this embodiment, there are two plug rods 121, and the two plug rods 121 correspond one-to-one with the two plug interfaces 211. The plug rods 121 and the plug interfaces 211 are plugged in and engaged.

[0054] When it is necessary to remove the motor 5 from the inside of the first cylinder 1, first remove the cover plate 12 from the first cylinder 1, then flip the cover plate 12 so that the insertion rod 121 on the cover plate 12 is inserted into the insertion interface 211, then rotate the cover plate 12 so that the insertion rod 121 drives the rotating ring 21 to rotate and the lifting tube 2 to rotate, thereby adjusting the position of the lifting tube 2 in the axial direction of the first cylinder 1.

[0055] During the process of the plug rod 121 driving the rotating ring 21 to rotate, in order to reduce the risk of the plug rod 121 disengaging from the plug interface 211, a positioning port 122 is provided on the side wall of the plug rod 121, and the rotating ring 21 and the positioning port 122 are plugged into each other.

[0056] After the plug rod 121 is placed inside the plug interface 211, the cover plate 12 is rotated to make the rotating ring 21 lock in the positioning port 122, thereby reducing the possibility of the plug rod 121 disengaging from the plug interface 211 and improving the stability of the rotating ring 21.

[0057] The connector 3 is equipped with an abutment, and the bottom of the inner wall of the lifting pipe 2 is coaxially provided with a lifting ring 22. The connector 3 is mounted on the motor 5, and the abutment and the top of the lifting ring 22 are in contact. When the lifting pipe 2 drives the lifting ring 22 to move toward the opening 11 of the first cylinder 1, the lifting ring 22 drives the abutment to move synchronously, and in turn, drives the motor 5 to move synchronously.

[0058] The connector 3 includes clamping plates 31 and connecting bolts 32. There is a pair of clamping plates 31, which clamp the motor 5 and hold it in place. Each clamping plate 31 has a connecting plate 311 at both ends, and a connecting nut 321 is threaded onto the connecting bolt 32.

[0059] When clamping the motor 5, the motor 5 is placed between two clamping plates 31, so that the two adjacent connecting plates 311 overlap. Then, the connecting bolt 32 passes through the two overlapping connecting plates 311, so that the bolt head of the connecting bolt 32 and the connecting nut 321 clamp the two connecting plates 311.

[0060] The connecting piece 311 and the clamping piece 31 are perpendicular, and the bolt head of the connecting bolt 32 acts as an abutment and contacts the top of the lifting ring 22. Because the connecting piece 311 and the clamping piece 31 are perpendicular, the connecting bolt 32 limits the connection piece 311 when the clamping piece 31 clamps the motor 5. Even if the connecting bolt 32 and the connecting nut 321 are loose, the stability of the clamping can still be guaranteed.

[0061] The relatively large contact area between the bolt head and the lifting ring 22 improves the stability of the lifting ring 22 in moving the connecting bolt 32.

[0062] To further improve the stability of the clamping of the motor 5 and reduce the damage to the motor 5 caused by the clamping, an elastic pad 4 is provided between the motor 5 and the clamping plate 31. The elastic pad provides cushioning and increases the friction between the clamping plate 31 and the motor 5.

[0063] The implementation principle of an adjustable shock absorber according to an embodiment of this application is as follows: When the shock absorber is working, the motor 5 drives the threaded rod to rotate. The rotation of the threaded rod drives the piston connected to it to move along the axial direction of the first cylinder 1, thereby adjusting the preload of the spring and thus adjusting the stiffness of the shock absorber. When placing the motor 5, the lifting tube 2 is first placed inside the first cylinder 1, and then the motor 5 is placed inside the lifting tube 2 and contacts the placement seat 6. The lifting tube 2 plays a positioning role for the motor 5. The lifting tube 2 is threadedly connected to the first cylinder 1. Rotating the lifting tube 2 can make it move along the axial direction of the first cylinder 1. The motor 5 is connected to the lifting tube 2 through the connecting member 3. The connecting member 3 includes a clamping piece 31 and a connecting bolt 32. The clamping piece 31 clamps the motor 5, and the connecting bolt 32 passes through the connecting piece 311 and cooperates with the connecting nut 321 to achieve fixation. The lifting ring 22 at the bottom of the inner wall of the lifting tube 2 contacts the abutment on the connecting member 3 (i.e., the bolt head of the connecting bolt 32). When the lifting tube 2 moves, it drives the motor 5 to move synchronously. After the motor 5 is placed, the cover plate 12 covers the opening 11 of the first cylinder 1 and contacts the top of the motor 5. When the motor 5 needs to be removed, the cover plate 12 is removed and flipped so that the insertion rod 121 is inserted into the insertion interface 211 of the rotating ring 21. The rotating cover plate 12 drives the rotating ring 21 and the lifting tube 2 to rotate, thereby adjusting the position of the lifting tube 2 to facilitate the removal of the motor 5.

[0064] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A shock-absorber rear shock-absorber with adjustable shock-absorber stiffness, characterized by: It includes a first cylinder, a second cylinder, and a motor, wherein: The first cylinder has an opening at the end away from the second cylinder, and a cover plate is provided at the opening; The first cylinder is provided with a lifting tube, which is located above the placement seat inside the first cylinder and can move along the axial direction of the first cylinder. The motor is placed on the mounting base; The motor is connected to the riser tube via a connector.

2. The rear shock absorber with adjustable damping stiffness according to claim 1, characterized in that: The outer wall of the riser pipe is threaded to the inner wall of the first cylinder. The top of the riser tube is provided with a rotating ring; The rotating ring is provided with multiple insertion interfaces.

3. A rear shock absorber with adjustable damping stiffness according to claim 2, characterized in that: The cover plate is provided with multiple plug-in rods; The plug rod is inserted into the plug interface.

4. A rear shock absorber with adjustable damping stiffness according to claim 3, characterized in that: The side wall of the plug rod is provided with a positioning port; The rotating ring and the positioning port are inserted into each other.

5. A rear shock absorber with adjustable damping stiffness according to claim 1, characterized in that: The connector is provided with an abutment member; The lifting pipe is equipped with a lifting ring; The top of the lifting ring and the bottom of the abutment are in contact.

6. A rear shock absorber with adjustable damping stiffness according to claim 5, characterized in that: The connector includes a clamping plate and a connecting bolt; The clamping plates are provided in pairs, and the pair of clamping plates clamp the motor; Both ends of the clamping piece are provided with connecting pieces; The connecting bolt passes through adjacent connecting pieces on a pair of clamping pieces; A connecting nut is threaded onto the connecting bolt; The bolt head of the connecting bolt and the connecting nut clamp a pair of adjacent connecting plates on the clamping plates.

7. A rear shock absorber with adjustable damping stiffness according to claim 6, characterized in that: The connecting piece and the clamping piece are perpendicular; The bolt head of the connecting bolt acts as the abutment and contacts the top of the lifting ring.

8. A rear shock absorber with adjustable damping stiffness according to claim 7, characterized in that: The outer wall of the motor is provided with elastic pads; The clamping piece and the elastic pad are in contact.

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