Motorcycle shock absorber with piston rebound damping convenient to adjust

Abstract

The utility model discloses a motorcycle shock absorber with adjustable piston rebound damping, and aims to solve the problem that an existing shock absorber is fixed in damping and cannot adapt to different road conditions and loads. The utility model relates to a hydraulic cylinder, which comprises a working cylinder, a piston, a piston rod and a joint, and is characterized in that a middle shaft hole is formed in the piston rod; the outer wall of the connector is sleeved with a rotary knob, a transmission rod is driven through threads to compress a transverse plate, a valve plug is pushed to adjust a gap between a valve needle and a valve nozzle, the flow of damping liquid is controlled, and damping hardness adjustment is achieved. The bottom of the working barrel is connected with a gas cylinder through a base, and a nitrogen cavity separated by a floating piston in the gas cylinder can buffer pressure fluctuation. Damping is flexibly adjusted through the rotary knob, the use comfort in different scenes is improved, the structure is compact, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to motorcycle shock absorber technology field, concretely relates to a kind of motorcycle shock absorber of piston rebound damping adjustment according to road condition, load. BACKGROUND

[0002] The core function of motorcycle shock absorber is to absorb road impact through the flow damping of damping fluid, and its comfort is mainly determined by piston rebound and compression damping. The piston damping aperture of existing shock absorber is fixed design, which cannot adjust damping hardness according to actual road conditions (such as bumping, flat) or load weight (such as single, double riding), resulting in single damping effect and difficulty in meeting the use requirements of different scenes. SUMMARY

[0003] To overcome the shortcomings of the prior art, the utility model aims to provide a motorcycle shock absorber with adjustable piston rebound damping, which realizes dynamic adjustment of damping flow through structural optimization to adapt to different road conditions and load requirements and improve use comfort.

[0004] To achieve the above object, the utility model provides the following technical scheme: a motorcycle shock absorber with convenient piston rebound damping adjustment, comprising a working cylinder, a piston is slidably arranged in the working cylinder along the inner hole, a piston rod is fixedly connected to the piston, one end of the piston rod extends out of the working cylinder and is connected to a connector, the connector is used to connect an upper support, the end of the piston rod penetrates the piston, a central shaft hole is formed in the piston rod, a tubular valve nozzle is fixedly connected to the end of the central shaft hole close to the piston, a valve plug is slidably arranged in the central shaft hole, a sealing ring is sleeved on the outer wall of the valve plug, a valve needle is fixedly connected to the end of the valve plug close to the valve nozzle, the valve needle can block the port of the valve nozzle, a return spring is sleeved between the valve plug and the valve nozzle, one end of the return spring abuts against the end face of the valve nozzle, and the other end of the return spring abuts against the end face of the valve plug, a transmission rod is further arranged in the central shaft hole, and the end of the transmission rod abuts against the valve plug, a rotatable knob is sleeved on the outer wall of the connector, the knob drives the transmission rod to extend or retract by driving, the valve plug is moved by the control of the knob, the gap between the valve needle and the port of the valve nozzle is adjusted, and the flow rate of damping fluid is controlled.

[0005] Further, a transmission groove is formed in the connector for inserting the transmission rod, a horizontal plate is fixedly connected in the transmission groove, and the end of the horizontal plate extends out of the transmission groove, the knob is threadedly connected to the outer wall of the connector, an annular open slot is formed in the knob, the end of the horizontal plate is in contact with the groove bottom of the open slot, and when the knob is rotated, the horizontal plate is compressed by thread, and the transmission rod drives the valve plug to move.

[0006] Further, a base is fixedly connected to the bottom of the working cylinder, and a gas cylinder is connected to the lower end of the base, a floating piston is slidably arranged in the gas cylinder, the floating piston divides the inner cavity of the gas cylinder into an upper chamber and a lower chamber, the upper chamber is communicated with the inside of the working cylinder, and the lower chamber is filled with nitrogen.

[0007] Furthermore, the valve plug is coaxially arranged with the valve mouth, and the axis of the valve needle coincides with the port axis of the valve mouth.

[0008] The beneficial effects of this utility model include: a knob-driven transmission rod adjusts the valve plug position, thereby controlling the clearance between the valve needle and the valve nozzle, achieving dynamic adjustment of the shock absorber fluid flow rate. When the knob is turned clockwise, the transmission rod pushes the valve plug, compressing the return spring, reducing the clearance between the valve needle and the valve nozzle and increasing damping. When the knob is turned counterclockwise, the return spring pushes the valve plug back, increasing the clearance and reducing damping. Users can flexibly adjust the position based on road conditions or load weight, significantly improving the shock absorber's adaptability and comfort. Furthermore, the design of the gas cylinder and floating piston buffers pressure fluctuations within the working cylinder, extending the shock absorber's service life.

[0009] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A perspective view of a specific embodiment of the present utility model;

[0011] Figure 2 A cross-sectional view of a specific embodiment of the present utility model;

[0012] Figure 3 for Figure 2 A magnified view of middle A;

[0013] Figure 4 for Figure 2 Magnified view of B.

[0014] Description of reference numerals:

[0015] 1-working cylinder; 2-piston; 3-piston rod; 4-connector; 5-central axis hole; 6-valve nozzle; 7-valve plug; 8-sealing ring; 9-valve needle; 10-reset spring; 11-transmission rod; 12-knob; 13-transmission groove; 14-cross plate; 15-opening groove; 16-base; 17-gas cylinder; 18-floating piston; 19-upper chamber; 20-lower chamber. DETAILED DESCRIPTION

[0016] The present invention is described in detail below through examples, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0017] like Figure 1 — Figure 4As shown, the embodiment discloses a motorcycle shock absorber with convenient piston rebound damping adjustment, which comprises a working cylinder 1, a piston 2 slidingly arranged in the working cylinder 1, an upper support connected to the piston 2 through a piston rod 3, a large spring arranged between the end of the piston rod 3 and the working cylinder 1, and a middle shaft hole 5 formed in the piston rod 3. A tubular valve nozzle 6 is fixed to the end of the middle shaft hole 5 close to the piston 2, a valve plug 7 is slidingly arranged in the valve nozzle 6, and a sealing ring 8 is sleeved on the outer wall of the valve plug 7 to prevent liquid leakage. A valve needle 9 is fixed to the end of the valve plug 7 close to the valve nozzle 6, and the valve needle 9 can block the port of the valve nozzle 6. A return spring 10 is sleeved between the valve plug 7 and the valve nozzle 6, and the ends of the return spring 10 abut against the end faces of the valve plug 7 and the valve nozzle 6, respectively.

[0018] A transmission rod 11 is further arranged in the middle shaft hole 5, and the end of the transmission rod 11 abuts against the valve plug 7. A rotatable knob 12 is sleeved on the outer wall of the joint 4, a transmission groove 13 is formed in the joint 4, a horizontal plate 14 is fixed in the transmission groove 13, and the end of the horizontal plate 14 extends out of the transmission groove 13. The knob 12 is threadedly connected to the outer wall of the joint 4, an annular open groove 15 is formed in the surface of the knob 12, and the end of the horizontal plate 14 is in contact with the groove bottom of the open groove 15.

[0019] A base 16 is fixed to the bottom of the working cylinder 1, and a gas cylinder 17 is connected to the lower end of the base 16. A floating piston 18 is slidingly arranged in the gas cylinder 17, and the gas cylinder 17 is divided into an upper chamber 19 (communicating with the working cylinder 1) and a lower chamber 20 (filled with nitrogen gas).

[0020] When adjusting the damping, the knob 12 is rotated: when rotated clockwise, the knob 12 moves downward along the outer wall of the joint 4 in a threaded manner, the horizontal plate 14 is compressed and retracted into the transmission groove 13, the transmission rod 11 is pushed to abut against the valve plug 7, the valve plug 7 moves to the valve nozzle 6 against the elastic force of the return spring 10, the gap between the valve needle 9 and the valve nozzle 6 is reduced, and the damping is increased; when rotated counterclockwise, the knob 12 moves upward, the horizontal plate 14 is reset outward under the elastic force of the return spring 10, the transmission rod 11 retreats with the valve plug 7, the gap between the valve needle 9 and the valve nozzle 6 is increased, and the damping is reduced.

[0021] After the above technical scheme is adopted, the position of the valve plug is adjusted by the knob driving the transmission rod, the gap between the valve needle and the valve nozzle is controlled, and the dynamic adjustment of the shock liquid flow is realized: when the knob is rotated clockwise, the transmission rod pushes the valve plug to compress the return spring, the gap between the valve needle and the valve nozzle is reduced, the damping is increased (hard damping), and when the knob is rotated counterclockwise, the return spring pushes the valve plug to reset, the gap is increased, the damping is reduced (soft damping). Users can flexibly adjust according to the degree of road bumps or the weight of the load, and the adaptability and use comfort of the shock absorber are significantly improved. In addition, the design of the gas cylinder and the floating piston can buffer the pressure fluctuation in the working cylinder, and prolong the service life of the shock absorber.

Claims

1. A motorcycle shock absorber with convenient piston rebound damping adjustment, comprising a working cylinder (1), a piston (2) slidingly arranged along an inner hole of the working cylinder (1), a piston rod (3) fixedly connected to the piston (2), one end of the piston rod (3) extending out of the working cylinder (1) and connected to a joint (4); characterized in that: The end of the piston rod (3) passes through the piston (2), and a central axis hole (5) is provided inside the piston rod (3); the end of the central axis hole (5) close to the piston (2) is fixedly connected to a tubular valve nozzle (6), a valve plug (7) is slidably provided in the central axis hole (5), and a sealing ring (8) is provided on the outer wall of the valve plug (7); the end of the valve plug (7) close to the valve nozzle (6) is fixedly connected to a valve needle (9), and the valve needle (9) can block the port of the valve nozzle (6); between the valve plug (7) and the valve nozzle (6) A return spring (10) is sleeved, one end of the return spring (10) abuts against the end face of the valve mouth (6), and the other end abuts against the end face of the valve plug (7); a transmission rod (11) is also provided in the central axis hole (5), and the end of the transmission rod (11) abuts against the valve plug (7); a rotatable knob (12) is sleeved on the outer wall of the joint (4), and the knob (12) drives the transmission rod (11) to extend and retract, thereby controlling the valve plug (7) to drive the valve needle (9) to move, thereby adjusting the gap between the valve needle (9) and the port of the valve mouth (6).

2. The motorcycle shock absorber with convenient piston rebound damping adjustment according to claim 1, characterized in that: The joint (4) is provided with a transmission groove (13) for inserting the transmission rod (11), and a transverse plate (14) is fixedly connected to the transmission groove (13), and the end of the transverse plate (14) extends out of the transmission groove (13); the knob (12) is threadedly connected to the outer wall of the joint (4), and the knob (12) is provided with an annular opening groove (15), and the end of the transverse plate (14) contacts the bottom of the opening groove (15).

3. The motorcycle shock absorber with convenient piston rebound damping adjustment according to claim 1, characterized in that: The bottom of the working cylinder (1) is fixedly connected to a base (16), and the lower end of the base (16) is connected to a gas cylinder (17); a floating piston (18) is slidably provided in the gas cylinder (17), and the floating piston (18) divides the inner cavity of the gas cylinder (17) into an upper chamber (19) and a lower chamber (20); the upper chamber (19) is communicated with the interior of the working cylinder (1), and the lower chamber (20) is filled with nitrogen.

4. The motorcycle shock absorber with convenient piston rebound damping adjustment according to claim 1, characterized in that: The valve plug (7) and the valve mouth (6) are coaxially arranged, and the axis of the valve needle (9) coincides with the port axis of the valve mouth (6).

5. The motorcycle shock absorber according to claim 2, characterized in that: The contact surface between the transverse plate (14) and the transmission rod (11) is a plane, and the transverse plate (14) moves axially along the transmission groove (13) under the drive of the knob (12).

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