Shock absorber hardness adjusting mechanism with limiting structure

Abstract

The utility model discloses a shock absorber hardness adjusting mechanism with a limiting structure, which is arranged on a shock absorber and realizes the change of the hardness of the shock absorber by adjusting the compression amount of a spring on the shock absorber. Comprising an inner sleeve and an adjusting sleeve, an outer thread is arranged on the outer peripheral surface of the inner sleeve, an inner thread is arranged on the inner peripheral surface of the adjusting sleeve, the inner thread and the outer thread are meshed together, a groove is formed in the outer peripheral surface of the adjusting sleeve, and the groove extends to the position of the outer thread; a positioning hole is formed in the adjusting sleeve and faces an external thread opening, and a limiting bead is arranged in the positioning hole, and is characterized in that a pressing structure is arranged on the outer side of the limiting bead in the positioning hole and is used for acting on the limiting bead, so that the limiting bead is pressed in the groove, and the adjusting sleeve is circumferentially fixed relative to the inner sleeve; or the pressing on the limiting bead is relieved.

Description

Technical Field

[0001] This utility model relates to a shock absorber, and more particularly to an adjustment mechanism with a limiting structure on the shock absorber for adjusting the stiffness of the shock absorber. Background Technology

[0002] To improve vehicle ride comfort, shock absorbers are installed at appropriate locations on the vehicle. These shock absorbers effectively reduce vibrations generated during driving. The structure of a shock absorber includes connecting structures at both ends, which are used to securely connect to corresponding parts on the vehicle. A spring is installed between the two connecting structures, with both ends providing axial elastic support. Inside the spring, between the two connecting structures, is a hydraulic cylinder-type damper. The piston rod of the damper is connected to one connecting structure, and the cylinder body is fixedly connected to the other connecting structure. The damper and spring work together to generate elastic force, thereby reducing vehicle vibrations.

[0003] Chinese patent document (publication number: CN217463034U) discloses an adjustable stiffness automotive shock absorber, relating to the field of shock absorber technology. The outer surface of the cylinder body has four sets of evenly distributed positioning holes in a rectangular shape. A lower limit member is slidably mounted on the surface of the cylinder body. The side of the lower limit member has four bolt holes in a rectangular shape that match the four sets of positioning holes. Each bolt hole and the positioning hole aligned with it share a bolt. The size of the bolt is adapted to the positioning holes and bolt holes. Screwing the four bolts into the four equally high positioning holes at different heights changes the position of the lower limit member, thereby changing the distance between the upper and lower limit members. This allows the device to accommodate springs of various lengths, increasing its practicality. The upper limit member is connected to the piston rod via an external threaded connection to a threaded hole. The lower limit member is mounted on the cylinder body using four bolts, allowing both the upper and lower limit members to be removed for easy replacement.

[0004] In this type of shock absorber, the spring compression is altered by inserting bolts into locating holes at different axial positions on the cylinder body, thus adjusting the shock absorber's stiffness. The locating holes on the cylinder body are spaced axially, resulting in a non-linear, segmented adjustment of the spring compression during adjustment, which cannot achieve precise adjustment of the shock absorber's stiffness. Furthermore, shock absorbers with threaded stiffness adjustment mechanisms are now available on the market. To achieve smooth adjustment, the meshing threads cannot be too tight. However, since the spring itself is helical, compression generates a tangential force on the adjustment mechanism. The adjustment mechanism, with a lower thread engagement, will therefore rotate circumferentially, altering the shock absorber's stiffness over time. Thus, a conflict arises between smooth adjustment and maintaining the spring's adjustment range, causing problems in practical applications. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a shock absorber hardness adjustment mechanism with a limiting structure. This adjustment mechanism is applied to the shock absorber so that the hardness adjustment amount of the shock absorber can be stably maintained.

[0006] To solve the aforementioned technical problem, the present invention provides the following technical solution: a shock absorber hardness adjustment mechanism with a limiting structure, comprising an inner sleeve and an adjusting sleeve. The outer circumferential surface of the inner sleeve is provided with an external thread, and the inner circumferential surface of the adjusting sleeve is provided with an internal thread. The internal and external threads mesh together. A groove is provided on the outer circumferential surface of the adjusting sleeve, extending to the position of the external thread. A positioning hole is provided inside the adjusting sleeve, opening towards the external thread. A limiting bead is provided inside the positioning hole. The key feature is that a pressing structure is provided outside the limiting bead inside the positioning hole. The pressing structure acts on the limiting bead, thereby pressing the limiting bead into the groove to fix the adjusting sleeve circumferentially relative to the inner sleeve, or to release the pressing of the limiting bead.

[0007] The groove typically runs through the entire external thread. When adjusting the shock absorber's stiffness, the adjusting sleeve needs to be rotated. As the sleeve rotates, the limiting bead can pass over the groove, producing a sound that indicates the number of rotations made. To adjust the shock absorber's stiffness, the limiting bead needs to be released. By rotating the adjusting sleeve on the inner sleeve, its axial position changes, thus altering the axial length of the shock absorber spring and consequently adjusting the shock absorber's stiffness.

[0008] Furthermore, the clamping structure includes a button, a rotating wheel, and a sliding rod. The button extends radially outward from the adjusting sleeve. A mating helical surface is provided between the proximal ends of the button and the rotating wheel. The sliding rod is slidably disposed between the button and the rotating wheel. A spring is provided between the rotating wheel and the limiting bead. Pressing the button causes the limiting bead to alternately press against the groove or release the pressure of the limiting bead. This clamping structure is similar to the pressing structure of a push-button ballpoint pen; pressing and releasing the limiting bead can be achieved by pressing the button twice.

[0009] Furthermore, the clamping structure includes a lever, the inner end of which extends into a positioning hole. An eccentric structure is provided on the inner end of the lever. The lever acts on a limiting bead through the eccentric structure, causing the limiting bead to be pressed into the groove or released from pressure. Typically, an intermediate transmission component is also provided between the inner end of the lever and the limiting bead to transmit force. Rotating the lever, under the action of the eccentric structure, achieves the pressing and releasing of the limiting bead. The structure is simple and the operation is very convenient.

[0010] Further, the pressing structure is a positioning column, which is threadedly connected to the positioning hole. By rotating the positioning column, the limiting bead is pressed against the groove or the pressing of the limiting bead is released. Tools such as screwdrivers, wrenches, hex wrenches, etc. are used to cause the positioning column to rotate in the positioning hole, so that the pressing and releasing of the limiting bead can be facilitated. The structure is simple and the operation is very convenient.

[0011] Further, the adjusting sleeve is in a "convex" shape. A force-receiving port is formed at one end of the adjusting sleeve. The force-receiving port extends along the entire circumference of the adjusting sleeve, and the cross-section of the force-receiving port is in an L shape. A number of block-shaped protrusions are provided in the force-receiving port, and these protrusions are arranged at intervals in the circumferential direction of the adjusting sleeve. This can effectively reduce the material consumption of the adjusting sleeve, facilitate the force-receiving of the adjusting sleeve, and facilitate the adjustment of the adjusting sleeve by using tools such as pipe wrenches or fingers.

[0012] Further, the positioning hole is provided at the position of the protrusion. The setting of the protrusion can also well ensure the size of the positioning hole, provide a relatively large installation space, and facilitate the setting of the positioning.

[0013] The beneficial effects of the present utility model are as follows: The present adjusting mechanism is applied to a shock absorber, and the compression amount of the spring in the shock absorber can be adjusted, so as to change the softness and hardness of the shock absorber. By providing a groove at the position of the external thread of the inner sleeve and realizing the tightness of the fit between the limiting bead and the groove through the setting of the pressing structure, the hardness of the shock absorber can be adjusted, and at the same time, the position stability of the adjusting sleeve in the circumferential direction of the inner sleeve can be ensured, so that the hardness of the shock absorber can be maintained after adjustment, which well meets the actual use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of the shock absorber adjusting mechanism with a limiting structure.

[0015] Figure 2 is Figure 1 the exploded view of.

[0016] Figure 3 is a structural diagram of an embodiment of the shock absorber adjusting mechanism with a limiting structure, and a part of the drawing is sectioned.

[0017] In the figure, 1, inner sleeve; 11, external thread, 12, groove; 2, adjusting sleeve; 21, protrusion; 22, positioning hole; 3, positioning column; 4, thrust spring; 5, limiting bead; 6, fixed stud; 7, button; 8, runner. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Referring to the accompanying drawings, this adjustment mechanism is applied to the shock absorber of a vehicle to adjust the stiffness of the shock absorber, thereby ensuring that the shock absorber meets the requirements for stable vehicle operation. Through the setting of the limiting structure, the axial position of the adjusting sleeve 2 on the inner sleeve 1 is kept stable, effectively resisting the shear force generated during use due to the axial compression change of the helical spring, thus ensuring the stable performance of the shock absorber.

[0019] The adjusting mechanism comprises an inner sleeve 1 and an adjusting sleeve 2. The outer circumferential surface of the inner sleeve 1 has an external thread 11, and the inner circumferential surface of the adjusting sleeve 2 has an internal thread. The adjusting sleeve 2 is coaxially fitted onto the inner sleeve 1, and the internal and external threads 11 mesh together. A groove 12 is provided on the outer circumferential surface of the adjusting sleeve 2, generally along the axial direction of the inner sleeve 1. As shown in the figure, the groove 12 penetrates the entire external thread 11 axially within the inner sleeve 1. A positioning hole 22 is provided inside the adjusting sleeve 2, generally along the radial direction of the adjusting sleeve 2, and opens towards the external thread 11. A limiting bead 5 is provided inside the positioning hole 22, and a clamping structure is provided outside the limiting bead 5 inside the positioning hole 22. A thrust spring 4 is provided between the clamping structure and the limiting bead 5, with both ends of the thrust spring 4 pressing against the clamping structure and the limiting bead 5, respectively. The clamping structure is used to act on the limiting bead 5, thereby changing the clamping force of the thrust spring 4 on the limiting bead 5, so that the limiting bead 5 is pressed into the groove 12 to fix the adjusting sleeve 2 circumferentially relative to the inner sleeve 1, or to release the clamping of the limiting bead 5.

[0020] As one embodiment, the pressing structure is similar to the pressing structure of a ballpoint pen, including a button 7, a rotating wheel 8, and a sliding rod. A thrust spring 4 is provided between the rotating wheel 8 and the limiting bead 5. The button 7 extends radially outward from the adjusting sleeve 2. A mating helical surface is provided between the near ends of the button 7 and the rotating wheel 8. The sliding rod is slidably disposed between the button 7 and the rotating wheel 8, with its two ends intermittently inserted into grooves provided on the outer circumferences of the button 7 and the rotating wheel 8. Both the sliding rod and the grooves are axially aligned with the positioning hole 22. Pressing the button 7 causes the rotating shaft to rotate under the action of the helical surface, causing the lower end of the sliding rod to sequentially insert into the groove or abut against the helical surface on the rotating wheel 8, thereby alternately pressing the limiting bead 5 into the groove 12 or releasing the pressing of the limiting bead 5.

[0021] As another embodiment, the pressing structure includes a lever. The lever is located outside the adjusting sleeve 2, and the inner end of the lever extends into the positioning hole 22. An eccentric structure is provided at the inner end of the lever. A transmission column is provided between the eccentric structure and the limiting bead 5. The thrust spring 4 is arranged between the transmission column and the limiting bead 5. Under the action of the thrust spring 4, the limiting bead 5 abuts against the inner sleeve 1, and the transmission column abuts against the eccentric structure on the lever. The lever acts on the limiting bead 5 through the eccentric structure, so that the limiting bead 5 is pressed in the groove 12 or the pressing of the limiting bead 5 is released.

[0022] As yet another embodiment, the pressing structure is a positioning column 3. The positioning column 3 is threadedly connected in the positioning hole 22. By rotating the positioning column 3, the limiting bead 5 is pressed in the groove 12 or the pressing of the limiting bead 5 is released. The outer end of the positioning column 3 can be a regular hexagonal prism or a regular quadrangular prism. Such a positioning column 3 is required to extend to the radial outside of the adjusting sleeve 2. A slotted or cross-shaped opening can also be provided on the outer end face of the positioning column 3 for a corresponding screwdriver to cooperate to achieve the circumferential rotation of the positioning column 3 in the positioning hole 22. An internal hexagonal hole can also be provided on the outer end face of the positioning column 3 for a hexagonal wrench to be inserted and mated to achieve the circumferential rotation of the positioning column 3 in the positioning hole 22.

[0023] In order to save the material consumption of the adjusting sleeve 2 and facilitate the force on the adjusting sleeve 2. The adjusting sleeve 2 is integrally in a "convex" shape. A force-receiving port is formed at one end of the adjusting sleeve 2. The force-receiving port is annular and extends along the entire circumference of the adjusting sleeve 2. The cross-section of the force-receiving port is L-shaped. A number of块状凸台 (block-shaped bosses) 21 are provided in the force-receiving port. Four bosses 21 are shown in the figure, and these four bosses 21 are arranged in a cross on the end face of the adjusting sleeve 2. The positioning hole 22 is provided at the position of the boss 21, and each boss 21 is provided with a positioning hole 22. Correspondingly, four grooves 12 can be provided on the outer circumferential surface of the inner sleeve 1, and these four grooves 12 are arranged in a cross on the inner sleeve 1.

[0024] Figure 3 As shown in the figure, the adjusting sleeve 2 is circular. Four fixing studs 6 are threadedly connected to the outer circumferential surface of the adjusting sleeve 2, and the outer ends of the fixing studs 6 protrude to the outside of the outer circumferential surface of the adjusting sleeve 2. The fixing stud 6 is a hollow structure, and the positioning hole 22 on the adjusting sleeve 2 is communicated with the inside of the fixing bolt. The button 7, the rotating wheel 8 and the sliding rod are arranged in the fixing stud 6, and the thrust spring 4 and the limiting bead 5 are arranged in the adjusting sleeve 2.

Claims

1. A shock absorber stiffness adjustment mechanism with a limiting structure, comprising an inner sleeve and an adjusting sleeve, wherein the outer circumferential surface of the inner sleeve is provided with an external thread, and the inner circumferential surface of the adjusting sleeve is provided with an internal thread, the internal thread and the external thread engaging together; a groove is provided on the outer circumferential surface of the adjusting sleeve, the groove extending to the position of the external thread; a positioning hole is provided inside the adjusting sleeve, the positioning hole opening towards the external thread, and a limiting bead is provided inside the positioning hole, characterized in that, A clamping structure is provided on the outside of the positioning bead inside the positioning hole. The clamping structure is used to act on the positioning bead, so that the positioning bead is pressed into the groove to fix the adjusting sleeve circumferentially relative to the inner sleeve, or to release the clamping of the positioning bead.

2. The shock absorber stiffness adjustment mechanism with limiting structure according to claim 1, characterized in that, The clamping structure includes a button, a rotating wheel, and a slide rod. The button extends to the radial outer side of the adjusting sleeve. There is a helical surface that abuts and adapts between the near ends of the button and the rotating wheel. The slide rod is slidably disposed between the button and the rotating wheel. A spring is provided between the rotating wheel and the limiting bead. By pressing the button, the limiting bead is alternately pressed into the groove or the pressing of the limiting bead is released.

3. The shock absorber stiffness adjustment mechanism with limiting structure according to claim 1, characterized in that, The clamping structure includes a lever, the inner end of which extends into a positioning hole. An eccentric structure is provided on the inner end of the lever. The lever acts on the limiting bead through the eccentric structure, thereby pressing the limiting bead into the groove or releasing the pressing of the limiting bead.

4. The shock absorber stiffness adjustment mechanism with limiting structure according to claim 1, characterized in that, The clamping structure is a positioning pin, which is threaded into the positioning hole. By rotating the positioning pin, the limiting bead is pressed into the groove or the clamping of the limiting bead is released.

5. The shock absorber stiffness adjustment mechanism with limiting structure according to any one of claims 1 to 4, characterized in that, The adjusting sleeve is convex in shape, with a force-bearing port formed at one end. The force-bearing port extends along the entire circumference of the adjusting sleeve, and the cross-section of the force-bearing port is L-shaped. Several block-shaped protrusions are provided in the force-bearing port, and these protrusions are arranged at intervals along the circumference of the adjusting sleeve.

6. The shock absorber stiffness adjustment mechanism with limiting structure according to claim 5, characterized in that, The positioning hole is located at the boss position.

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