Motorcycle shock absorber

Abstract

The invention relates to the technical field of motorcycle shock absorbers, and discloses a motorcycle shock absorber which comprises four cylinders, telescopic rods are arranged in first inner cavities of the cylinders, positioning rods are fixed to the bottoms of the first inner cavities, and the telescopic rods reciprocate on the positioning rods. A first damping hole is formed in the telescopic rod, and the damping cavity communicates with the first inner cavity through the first damping hole. And the shock absorption effect and the service life of the shock absorber during operation are improved.

Description

Technical Field

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

[0002] Motorcycle shock absorber is a device installed on motorcycles, mainly used to reduce the vibration and bumps of the vehicle during driving, improve riding comfort and stability. It absorbs and disperses the impact force generated during the driving process of the vehicle, reduces the bumps of the vehicle body and passengers, and makes the ride more stable and comfortable.

[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, the connecting sleeve is provided with a front wheel axle hole, 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, and a spring is sleeved on each movable rod, and the upper and lower ends of the spring are limited; it is characterized in that: the lower parts of two adjacent cylinders can move radially.

[0004] The existing technology has the following deficiencies: the existing four-spring shock absorber adopts the internal chip removal method to process the inner hole of the bottom tube or the seamless tube fine rolling method, and the surface roughness of the inner hole is general. The front wheel axle passes through the four axial holes of the four-spring shock absorber at the same time. The telescopic rod is compressed and bottomed with a hydraulic buffer device, which has high running noise and poor smoothness, thereby causing defects such as accelerated wear of components and increased temperature, resulting in poor comfort during riding. The increased temperature will accelerate the aging of the oil seal and reduce the shock absorption effect and service life. Summary of the invention

[0005] In order to solve the technical problem of how to improve the shock absorption effect and service life of the shock absorber, the present invention provides a motorcycle shock absorber, including four cylinders, a telescopic rod is provided in the inner cavity one of the cylinder, a positioning rod is fixed at the bottom of the inner cavity one, and the telescopic rod reciprocates on the positioning rod. It is characterized in that a damping chamber is provided between the telescopic rod and the cylinder, a damping hole one is provided on the telescopic rod, and the damping chamber is connected to the inner cavity one through the damping hole one.

[0006] In order to reduce the friction damping of the telescopic rod, an upper lubricating sleeve is fixedly provided on the inner diameter of the cylinder, and a lower lubricating sleeve is fixedly provided on the outer wall of the telescopic rod. The damping chamber is formed between the upper lubricating sleeve, the lower lubricating sleeve, the telescopic rod and the cylinder, further improving the comfort of use.

[0007] Preferably, the upper lubricating sleeve and the lower lubricating sleeve are polytetrafluoroethylene composite sleeves, which utilize the self-lubricating properties and ultra-low friction coefficient of polytetrafluoroethylene material, as well as the reduction of the frictional engagement area to minimize friction damping, reduce operating noise, and reduce temperature rise, thereby improving the operating comfort and service life of the shock absorber.

[0008] Preferably, the thickness of the damping chamber is 0.4-0.6 mm.

[0009] In order to facilitate the coordination with the damping cavity, the middle part of the positioning rod is inner cavity 2, and a plurality of damping holes 2 are provided on the positioning rod. The inner cavity 2 is connected to the inner cavity 1 of the cylinder through the damping holes 2.

[0010] Preferably, the bottom of the four cylinders are provided with supporting ears, the supporting ears are provided with front wheel axle holes, the four front wheel axle holes are connected by the front wheel axle, and T-shaped bushings are provided between the outer sides of two front wheel axle holes and the front wheel axle.

[0011] In order to prevent the shock absorber from getting stuck and reduce the difficulty of processing, the outer end surface of the T-shaped bushing is higher than the end surface of the outer front wheel axle hole, and the two ends of the front wheel axle are pressed against the outer end surface of the T-shaped bushing.

[0012] In order to facilitate compression buffering, a hydraulic buffer assembly is sleeved on the bottom of the positioning rod, and the hydraulic buffer assembly and the positioning rod are fixed to the bottom of the cylinder by bolts.

[0013] In order to facilitate the buffering of the telescopic rod, the sliding sleeve on the positioning rod is provided with a buffer structure, the buffer structure is connected to the bottom of the telescopic rod, and the buffer structure is provided with a damping hole three, and the damping hole three is connected to the damping hole one.

[0014] The present invention has the following beneficial effects: 1. Improve shock absorption effect and extend service life: When the telescopic rod is in the recovery process during motorcycle driving, the damping hole on the telescopic rod cooperates with the damping chamber to increase the recovery damping. Secondly, the upper lubricating sleeve, the lower lubricating sleeve and the damping chamber work together to reduce the contact surface between the telescopic rod and the cylinder, reduce friction damping, and enhance shock absorption effect. Compared with conventional shock absorbers, the present invention can improve the original damping of each cylinder; thereby improving the ability to attenuate the spring elastic potential energy impulse, thereby improving riding comfort and extending the service life of the shock absorber.

[0015] 2. Reduce processing precision and cost: The use of T-type bushings can reduce a series of defects such as shock absorber jamming, poor riding comfort, abnormal wear, and poor durability caused by the substandard coaxiality of the 4 holes and the parallelism of the 4 shock absorbers. At the same time, it can also reduce processing difficulty, improve the quality pass rate, and reduce the cost of use; the T-type bushing is subjected to lateral force, the front wheel axle and the cylinder are not in direct rigid contact, and it has an anti-lock function, which reduces the risk of cylinder breakage and further improves comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of an embodiment of a motorcycle shock absorber of the present invention; Figure 2 is a cross-sectional view of the cylinder; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the installation structure of the front axle: Figure 5 for Figure 4 The enlarged view of point B in the middle; Figure 6 This is the side view of Question 1. 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: cylinder 1, telescopic rod 2, inner cavity 1 3, upper cavity 301, lower cavity 302, positioning rod 4, buffer structure 5, upper lubricating sleeve 6, lower lubricating sleeve 7, damping chamber 8, damping hole 1 9, inner cavity 2 10, damping hole 2 11, support ear 12, front wheel axle hole 13, front wheel axle 14, hydraulic buffer assembly 15, T-type bushing 16, front wheel axle head 17, nut 18, oil inlet hole 19.

[0018] Example 1 like Figure 1-6 As shown, a motorcycle shock absorber comprises four cylinders 1, wherein an inner cavity 3 of the cylinder 1 is provided with a telescopic rod 2, an outer sleeve of the telescopic rod 2 is provided with a spring, the inner cavity 3 comprises an upper cavity 301 and a lower cavity 302, a positioning rod 4 is fixed to the bottom of the lower cavity 302, a buffer structure 5 is movably sleeved on the positioning rod 4, the buffer structure 5 adopts a bottom valve, the bottom of the telescopic rod 2 is connected to the buffer structure 5 and reciprocates on the positioning rod 4, an upper lubricating sleeve 6 is fixedly provided on the inner diameter of the cylinder 1, a lower lubricating sleeve 7 is fixedly provided on the outer wall of the telescopic rod 2, an annular damping chamber 8 is formed between the upper lubricating sleeve 6, the lower lubricating sleeve 7, the telescopic rod 2 and the cylinder 1, and the thickness of the damping chamber 8 is 0.5 mm. The telescopic rod 2 is provided with two left and right damping holes 9, and the buffer structure 5 is provided with two left and right damping holes 3 20. The damping hole 3 20 is connected with the damping hole 9, and the damping chamber 8 is connected with the inner cavity 3 through the damping hole 9 and the damping hole 3 20. During the recovery process of the telescopic rod 2, a small amount of hydraulic oil enters the damping chamber 8 through the damping hole 9 to generate recovery damping, thereby improving the ability of attenuating the recovery buffer force, improving riding comfort, and extending the service life of the shock absorber. The upper lubricating sleeve 6 and the lower lubricating sleeve 7 are polytetrafluoroethylene composite sleeves. The self-lubricating properties and ultra-low friction coefficient of polytetrafluoroethylene material, as well as the reduction of the frictional bonding area, can minimize the friction damping to the greatest extent, reduce the operating noise, and further reduce the temperature rise.

[0019] The middle part of the positioning rod 4 is an inner cavity 10 , the upper part of the positioning rod 4 is provided with a plurality of damping holes 11 , the lower part is provided with an oil inlet hole 19 , and the lower cavity 302 is connected to the inner cavity 10 of the positioning rod 4 through the oil inlet hole 19 .

[0020] The outer wall of the bottom of the cylinder 1 is provided with a support ear 12, and the support ear 12 is provided with a front wheel axle hole 13. The four front wheel axle holes 13 are connected by a front wheel axle 14. A T-shaped bushing 16 is provided between the outer sides of two front wheel axle holes 13 and the front wheel axle 14. The outer end surface of the T-shaped bushing 16 is higher than the end surface of the outer front wheel axle hole 13. The two ends of the front wheel axle 14 are a front wheel axle head 17 and a nut 18 respectively. The front wheel axle head 17 and the nut 18 are respectively pressed against the outer end surfaces of the T-shaped bushing 16 at the two ends.

[0021] A hydraulic buffer assembly 15 is sleeved on the bottom of the positioning rod 4 , and the hydraulic buffer assembly 15 and the positioning rod 4 are fixed to the bottom of the cylinder 1 by bolts.

[0022] 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 obtain 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 motorcycle shock absorber, comprising four cylinders (1), wherein a telescopic rod (2) is arranged in an inner cavity (3) of each cylinder (1), a positioning rod (4) is fixed at the bottom of the inner cavity (3), and the telescopic rod (2) reciprocates on the positioning rod (4), characterized in that: A damping chamber (8) is provided between the telescopic rod (2) and the cylinder (1), a damping hole (9) is provided on the telescopic rod (2), and the damping chamber (8) is connected to the inner cavity (3) via the damping hole (9).

2. The motorcycle shock absorber according to claim 1, characterized in that: An upper lubricating sleeve (6) is fixedly provided on the inner diameter of the cylinder (1), a lower lubricating sleeve (7) is fixedly provided on the outer wall of the telescopic rod (2), and the damping chamber (8) is formed between the upper lubricating sleeve (6), the lower lubricating sleeve (7), the telescopic rod (2) and the cylinder (1).

3. The motorcycle shock absorber according to claim 2, characterized in that: The upper lubricating sleeve (6) and the lower lubricating sleeve (7) are polytetrafluoroethylene composite sleeves.

4. The motorcycle shock absorber according to any one of claims 1 to 3, characterized in that: The thickness of the damping chamber (8) is 0.4-0.6 mm.

5. The motorcycle shock absorber according to claim 4, characterized in that: The middle part of the positioning rod (4) is an inner cavity 2 (10), and a plurality of damping holes 2 (11) are provided on the positioning rod (4). The inner cavity 2 (10) is connected to the inner cavity 1 (3) of the cylinder (1) through the damping holes 2 (11).

6. The motorcycle shock absorber according to claim 1, 2, 3 or 5, characterized in that: The bottom of the four cylinders (1) are each provided with a support ear (12), a front wheel axle hole (13) is provided on the support ear (12), the four front wheel axle holes (13) are connected by a front wheel axle (14), and a T-shaped bushing (16) is provided between the outer sides of two front wheel axle holes (13) and the front wheel axle (14).

7. The motorcycle shock absorber according to claim 6, characterized in that: The outer end surface of the T-shaped bushing (16) is higher than the end surface of the outer front wheel axle hole (13), and the two ends of the front wheel axle (14) are pressed against the outer end surface of the T-shaped bushing (16).

8. The motorcycle shock absorber according to claim 7, characterized in that: A hydraulic buffer assembly (15) is sleeved on the bottom of the positioning rod (4), and the hydraulic buffer assembly (15) and the positioning rod (4) are fixed to the bottom of the cylinder (1) by bolts.

9. The motorcycle shock absorber according to claim 7 or 8, characterized in that: The sliding sleeve on the positioning rod (4) is provided with a buffer structure (5), the buffer structure (5) is connected to the bottom of the telescopic rod (2), the buffer structure (5) is provided with a damping hole three (20), and the damping hole three (20) is connected to the damping hole one (9).

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