Four-spring shock absorber

Abstract

The invention relates to the technical field of motorcycle shock absorbers, and discloses a four-spring shock absorber which comprises four supporting cylinders, a telescopic rod is arranged in an inner cavity of each supporting cylinder, the lower portions of every two adjacent supporting cylinders can move in the radial direction, and the four-spring shock absorber is characterized in that damping cavities are formed between the telescopic rods and the interiors of the supporting cylinders and communicated with the inner cavities; any one of the supporting cylinders is a high-damping supporting cylinder, a damper is arranged in the high-damping supporting cylinder, and the damping device has the advantages of being low in manufacturing cost and good in damping effect.

Description

Technical Field

[0001] The invention relates to the technical field of motorcycle shock absorbers, and in particular to a four-spring shock absorber. Background Art

[0002] A motorcycle four-spring shock absorber is a shock absorber system that provides better shock absorption. Compared with the traditional double-spring shock absorber system, it has two more shock absorbers, so it can better reduce the vibration and bumps of the vehicle. The four-spring shock absorber system usually consists of two front shock absorbers and two rear shock absorbers. The front shock absorber is installed on the front suspension system of the motorcycle, and the rear shock absorber is installed on the rear suspension system of the motorcycle. Each shock absorber consists of a spring and a shock absorber, which work together to absorb the impact caused by uneven road surface.

[0003] Chinese patent document CN115163725A discloses a motorcycle shock absorber, which includes four cylinders. The lower parts of two adjacent cylinders are movably connected together by a connecting sleeve, and a front wheel axle hole is provided on the connecting sleeve. A movable rod is inserted into the inner cavity (inner hole) of each cylinder. The top of each movable rod is connected to a support seat assembly. A spring is sleeved on each movable rod, and the upper and lower ends of the spring are limited; the lower parts of the two adjacent cylinders can move radially.

[0004] Chinese patent document CN107461446A discloses a four-guide positioning replaceable damper shock absorber assembly, including a direction shaft, a connecting plate, two upper support cylinder assemblies, two dampers, two lower support cylinder assemblies and a transverse axis, wherein the direction shaft is fixed on the connecting plate, and two fixing sleeve mounting holes are provided on the connecting plate; the damper has a piston rod, a working cylinder, an oil storage cylinder and a base, the outer wall of the oil storage cylinder is slidably matched with the inner wall of the upper support cylinder, and the working cylinder is located in the oil storage cylinder.

[0005] The prior art has the following disadvantages: in the prior art, the number of dampers is increased to ensure the riding comfort of the motorcycle, but the cost is high, while the shock absorption effect is not good when the number of dampers is reduced. Summary of the invention

[0006] In order to simultaneously solve the technical problems of high manufacturing cost and poor shock absorption effect, the present invention provides a four-spring shock absorber, including four support tubes, each support tube having an inner cavity provided with a telescopic rod, and the lower parts of two adjacent support tubes can move radially, and is characterized in that a damping chamber is provided between the telescopic rod and the support tube, and the damping chamber is connected to the inner cavity, wherein any one of the support tubes is a high-damping support tube, and a damper is provided in the high-damping support tube.

[0007] Preferably, a damping hole 1 is provided at the lower portion of the telescopic rod in the high-damping support tube, and the damping cavity is connected to the inner cavity through the damping hole 1.

[0008] Preferably, the four support cylinder installation positions are respectively located at the right front, right rear, left front and left rear of the motorcycle, and the support cylinder located at the right front is the high-damping support cylinder.

[0009] In order to further reduce the vibration frequency and amplitude, the damper includes a working cylinder and a pull rod, the upper end of the pull rod is fixed to the upper part of the telescopic rod, the lower end of the pull rod is provided with a piston, the piston is provided with a throttling hole and an oil outlet channel, the bottom of the working cylinder is provided with an oil inlet channel, and a valve plate is provided above the oil outlet channel. The valve plate blocks the oil outlet channel through an elastic part, and the throttling hole is directly connected with the inner cavity. The throttling hole is for small flow of oil, and the oil outlet channel is for large flow of oil.

[0010] In order to facilitate the elastic member to control the valve plate to reset and bounce, a connecting sleeve is provided between the pull rod and the piston, a mounting groove is provided at the bottom of the connecting sleeve, and the elastic member is arranged in the mounting groove.

[0011] In order to facilitate the pull rod and the piston to buffer and improve the stability in use, a buffer assembly is provided at the bottom of the working cylinder.

[0012] In order to further reduce costs, the axial holes on the four support ears at the bottom of the support tube are simultaneously penetrated and fixed by the front wheel axle, and a bushing is provided between the front wheel axle and the axial hole, and the length of the bushing extends outside the axial hole.

[0013] Preferably, the bushing is an anti-lock T-shaped bushing, which is convenient for fixing on the support ear.

[0014] The present invention has the following beneficial effects: 1. Use a high-damping support tube to replace the conventional positioning rod structure, and combine the damping cavity between the telescopic rod and the support tube to increase the recovery resistance of the shock absorber, improve the effect of attenuating the elastic potential energy of the compression spring, and reduce the vibration frequency and amplitude. Only one damper can ensure the overall shock absorption effect while reducing the manufacturing cost.

[0015] 2. Good riding comfort. The bushing ensures the parallelism of the four support tubes during installation and use. It is not easy to get stuck while riding. The bushing can repair installation errors and human errors by itself. It does not require excessive installation accuracy and can also ensure the quality pass rate, further reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of an embodiment of a four-spring shock absorber of the present invention; Figure 2 A side view of an embodiment of a four-spring shock absorber of the present invention; Figure 3 It is a schematic diagram of the internal structure of the high damping support cylinder; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the internal structure of the high damping support cylinder in the working state; Figure 7 Schematic diagram of the internal structure of the remaining three support tubes. DETAILED DESCRIPTION

[0017] The following is further described in detail through specific implementation methods: 1. The reference numerals in the drawings of the specification include: support cylinder 1, inner cavity 101, high damping support cylinder 102, polytetrafluoroethylene composite sleeve 103, telescopic rod 2, damping hole 201, damping chamber 3, damper 4, working cylinder 401, pull rod 402, piston 403, throttle hole 404, oil outlet channel 405, oil inlet channel 406, elastic member 407, valve plate 408, connecting sleeve 5, mounting groove 501, buffer assembly 6, support ear 7, shaft hole 8, front wheel shaft 9, bushing 10, positioning rod 11, bottom valve 12, throttle hole 13.

[0018] Example 1 like Figure 1-7 As shown, a four-spring shock absorber includes four support tubes 1. The four support tubes 1 are installed at the right front, right rear, left front and left rear of the motorcycle respectively. A telescopic rod 2 is provided in the inner cavity 101 of each support tube 1. The lower parts of two adjacent support tubes 1 can move radially at the same time. A damping cavity 3 is provided between the telescopic rod 2 and the support tube 1. The damping cavity 3 is connected to the inner cavity 101. The support tube 1 located at the right front is the high-damping support tube 102. A damper 4 is provided in the high-damping support tube 102.

[0019] A damping hole 201 is provided at the lower part of the telescopic rod 2 in the high-damping support tube 102, and the damping chamber 3 is connected to the inner chamber 101 through the damping hole 201. A polytetrafluoroethylene composite sleeve 103 is provided on the outer wall of the lower part of the telescopic rod 2, and a polytetrafluoroethylene composite sleeve 103 is also provided on the inner wall of the upper part of the high-damping support tube 102. The two polytetrafluoroethylene composite sleeves 103, the telescopic rod 2 and the high-damping support tube 102 together constitute the damping chamber 3, and the structural composition of the damping chamber 3 of the other three support tubes 1 is consistent with the structural composition of the damping chamber 3 in the high-damping support tube 102.

[0020] The damper 4 includes a working cylinder 401 and a pull rod 402. The upper end of the pull rod 402 is fixed to the upper part of the telescopic rod 2. The lower end of the pull rod 402 is provided with a piston 403. The piston 403 is provided with a throttling hole 404 and an oil outlet channel 405. The throttling hole 404 is horizontally arranged on the piston 403 and is directly connected to the inner cavity 101. A valve plate 408 is provided above the oil outlet channel 405. The valve plate 408 blocks the oil outlet channel 405 through the elastic member 407. The throttling hole 404 is for small flow oil. An oil inlet channel 406 is provided at the bottom of the working cylinder 401.

[0021] A connecting sleeve 5 is provided between the pull rod 402 and the piston 403, and a mounting groove 501 is provided at the bottom of the connecting sleeve 5. The elastic member 407 is arranged in the mounting groove 501. A buffer assembly 6 is provided at the bottom of the working cylinder 401. When the pull rod 402 and the telescopic rod 2 drive the piston 403 to move downward, a negative pressure is generated in the upper chamber 4011 of the working cylinder 401, so that the hydraulic oil in the lower chamber 4012 of the working cylinder 401 pushes open the valve plate 408 to open the oil outlet channel 405 and flows into the upper chamber 4011. At the same time, part of the hydraulic oil flows into the upper chamber 4011 through the throttle hole 404, and a very small part of the hydraulic oil enters the damping chamber 3. The damper 4 cooperates with the damping chamber 3 to generate compression damping. When the pull rod 402 and the telescopic rod 2 drive the piston 403 to move upward, the lower chamber 4012 generates negative pressure, the elastic member 407 presses the valve plate 408 to close the oil outlet channel 405, and the hydraulic oil in the upper chamber 4011 flows into the lower chamber 4012 through the throttle hole 404, and a small amount of hydraulic oil in the damping chamber 3 also flows into the inner chamber 101, thereby generating a restoring resistance.

[0022] The axial holes 8 on the four bottom ears 7 of the support tube 1 are simultaneously penetrated and fixed by the front wheel axle 9. A bushing 10 is provided between the front wheel axle 9 and the axial hole 8. The length of the bushing 10 extends outside the axial hole 8. The bushing 10 is an anti-lock T-type bushing 10.

[0023] The other three support tubes 1 are provided with positioning rods 11, and the positioning rods 11 are provided with a buffer structure, and the buffer structure is a bottom valve 12. The bottom valve 12 is provided with a damping hole 2 1201, and the damping hole 2 1201 is connected with the damping hole 1 201, and the damping hole 2 1201 is used to connect the damping chamber 3 between the telescopic rod 2 and the support tube 1. The upper and lower parts of the positioning rod 11 are provided with a plurality of throttling holes 13, and the throttling holes 13 are connected to the inner cavity 101 of the support tube 1.

[0024] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can know all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A four-spring shock absorber, comprising four support tubes (1), wherein a telescopic rod (2) is provided in an inner cavity (101) of each support tube (1), and the lower parts of two adjacent support tubes (1) can move radially, characterized in that: A damping chamber (3) is provided between the telescopic rod (2) and the support tube (1), the damping chamber (3) being connected to the inner chamber (101), wherein any one of the support tubes (1) is a high-damping support tube (102), and a damper (4) is provided in the high-damping support tube (102).

2. The four-spring shock absorber according to claim 1, characterized in that: A damping hole 1 (201) is provided at the lower part of the telescopic rod (2) in the high-damping support cylinder (102), and the damping cavity (3) is connected to the inner cavity (101) via the damping hole 1 (201).

3. The four-spring shock absorber according to claim 1 or 2, characterized in that: The four support cylinders (1) are installed at the right front, right rear, left front and left rear of the motorcycle respectively, and the support cylinder (1) located at the right front is the high damping support cylinder (102).

4. The four-spring shock absorber according to claim 3 is characterized in that: The damper (4) comprises a working cylinder (401) and a pull rod (402), wherein the upper end of the pull rod (402) is fixed to the upper part of the telescopic rod (2), and the lower end of the pull rod (402) is provided with a piston (403), and the piston (403) is provided with a throttling hole (404) and an oil outlet channel (405). The bottom of the working cylinder (401) is provided with an oil inlet channel (406), and a valve plate (408) is provided above the oil outlet channel (405), and the valve plate (408) blocks the oil outlet channel (405) through an elastic member (407). The throttling hole (404) is directly connected to the inner cavity (101), and the throttling hole (404) is for oil flow at a small flow rate, and the oil outlet channel (405) is for oil flow at a large flow rate.

5. The four-spring shock absorber according to claim 4, characterized in that: A connecting sleeve (5) is provided between the pull rod (402) and the piston (403), a mounting groove (501) is provided at the bottom of the connecting sleeve (5), and the elastic member (407) is arranged in the mounting groove (501).

6. The four-spring shock absorber according to claim 4 or 5, characterized in that: A buffer assembly (6) is provided at the bottom of the working cylinder (401).

7. The four-spring shock absorber according to claim 6, characterized in that: The axial holes (8) on the bottom ears (7) of the four support tubes (1) are simultaneously penetrated and fixed by the front wheel axle (9); a bushing (10) is provided between the front wheel axle (9) and the axial hole (8); the length of the bushing (10) extends outside the axial hole (8).

8. The four-spring shock absorber according to claim 7, characterized in that: The bushing (10) is an anti-lock T-shaped bushing (10).

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