An oil leakage-proof shock absorber for a motorcycle

Abstract

The utility model discloses a kind of oil leakage prevention shock absorbers for motorcycle, it is related to motorcycle shock absorber field, including shock-absorbing hollow pole, the top of shock-absorbing hollow pole is equipped with top leakage-proof block, the inside of top leakage-proof block is equipped with the elastic leakage-proof mechanism of the sealing property of equipment is improved, the elastic leakage-proof mechanism includes extension contraction rod, and extension contraction rod slidingly installed in the top inside of shock-absorbing hollow pole.This oil leakage prevention shock absorber for motorcycle, after equipment is resisted by outside, extension contraction rod drives the whole of fitting sealing block to carry out vertical contraction along the inside of shock-absorbing hollow pole at this time, will be extruded to achieve preliminary buffering effect in this process Resistance contraction spring, and the recessed sealing ring in top leakage-proof block can reach more closely docking fit with docking convex ring in docking process, such design makes that the bearing performance of equipment inside is stronger, and the installation tightness of internal damping liquid and the use stability of equipment are improved synchronously.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle shock absorber technology, specifically to an oil-leakage-proof shock absorber for motorcycles. Background Technology

[0002] Motorcycle shock absorbers are core components that affect the riding experience. Their performance is directly related to the vehicle's stability, comfort, and safety. Their basic function is to provide support and cushioning. Through hydraulic or spring shock absorption structures, they absorb road vibrations, reduce vehicle bumps, ensure a smooth and comfortable ride, and help improve the motorcycle's lifespan and handling stability.

[0003] In the existing design, as the motorcycle moves along with the undulations of the ground, the fork tube and guide cylinder of the liquid damper expand and contract relative to each other. The liquid in the fork tube circulates in the fork tube and the working cylinder within the fork tube. During this process, the liquid will seep out from the connection between the fork tube and the guide cylinder, resulting in leakage. At the same time, air bubbles will be generated in the liquid in the fork tube, affecting the damping stability of the damper.

[0004] To overcome the above-mentioned defects, the prior art (Chinese patent publication number: CN118375685A, publication date: 2024-07-23) discloses an oil leakage damper and a motorcycle shock absorber, belonging to the field of vehicle shock absorber structural technology. This damper divides the inner tube component into an upper inner chamber and a lower inner chamber through a second piston component. Combined with the design of a second flow channel on a fixedly installed second piston seat and a floating piston in the lower inner chamber, it solves the problems of liquid leakage and unstable damping in the liquid damper of the motorcycle front fork shock absorber. This damper includes a guide cylinder and a front fork tube arranged in a telescoping manner. A first piston rod is installed in the guide cylinder. A first piston component is installed at the lower end of the first piston rod. A sealed inner tube component is installed in the front fork tube. The interior of the inner tube component is divided into an upper inner chamber and a lower inner chamber by the second piston component. The lower end of the first piston rod passes through the upper end of the upper inner chamber. The second piston component includes a fixedly installed second piston seat with a second flow channel. A floating piston matching its inner wall is provided in the lower inner chamber.

[0005] While the above design can solve the aforementioned problems, relying solely on the docking buffer design after the equipment is subjected to radial compression and contraction will increase the internal stress on the equipment, affecting its service life. Furthermore, the internal damping fluid is more likely to leak at the docking point, reducing the equipment's strength. At the same time, when encountering large drops or very bumpy roads, the existing design cannot handle them stably and calmly, making the driver's experience very uncomfortable. The buffering effect is also significantly reduced, and the equipment becomes easily fatigued, resulting in insufficient safety and stability in the use of the equipment. Utility Model Content

[0006] The purpose of this invention is to provide an oil-leakage-proof shock absorber for motorcycles, which solves the problems mentioned in the background art. When the device is subjected to radial compression and contraction, relying solely on the docking buffer design increases the internal stress of the device, affecting its service life. Furthermore, during this process, the internal damping fluid is more likely to leak at the docking point, reducing the device's strength. At the same time, when encountering large drops or very bumpy roads, the existing design cannot stably and calmly cope with them, making the user experience very uncomfortable. The buffering effect is also significantly reduced, and the device is prone to fatigue, resulting in insufficient safety and stability of the device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an oil leak-proof shock absorber for motorcycles, comprising a shock-absorbing hollow rod, a top leak-proof block installed on the top of the shock-absorbing hollow rod, an elastic leak-proof mechanism for improving the airtightness of the device installed inside the top leak-proof block, the elastic leak-proof mechanism comprising an extension and contraction rod, the extension and contraction rod being slidably installed inside the top end of the shock-absorbing hollow rod, a top rotating block installed at the ends of the shock-absorbing hollow rod and the extension and contraction rod, and a docking auxiliary mechanism for contracting a second multi-layer contraction rod installed on the outer surface of the top rotating block.

[0008] Furthermore, the docking auxiliary mechanism includes an auxiliary buffer rod, and the installation position of the auxiliary buffer rod is opposite to that of the side mounting block. A first multi-layer retractable rod is installed on the top of the inner surface of the auxiliary buffer rod, and a rotating connecting rod is installed on the outer surface of the top rotating block.

[0009] Furthermore, the docking auxiliary mechanism includes an auxiliary buffer rod, and the installation position of the auxiliary buffer rod is opposite to that of the side mounting block. A first multi-layer retractable rod is installed on the top of the inner surface of the auxiliary buffer rod, and a rotating connecting rod is installed on the outer surface of the top rotating block.

[0010] Furthermore, a sealing block is installed at the lower end of the extension and retraction rod, and the outer surface of the sealing block is fitted to the inner surface of the shock-absorbing hollow rod. A side mounting block is installed on the outer surface of the shock-absorbing hollow rod, and a concave sealing ring is installed on the inner surface of the top leak-proof block.

[0011] Furthermore, a mating protrusion ring is installed on the top outer surface of the shock-absorbing hollow rod, and the downward position of the concave sealing ring corresponds to the installation position of the mating protrusion ring. The installation position of the extension and contraction rod passes through the interior of the top leak-proof block, and the mating surfaces of the mating protrusion ring and the concave sealing ring mesh with each other.

[0012] Furthermore, an anti-contraction spring is installed on the outer surface of the extension and retraction rod, and the mating surfaces of the extension and retraction rod and the top anti-leakage block respectively abut against the upper and lower ends of the anti-contraction spring, and the lower end of the extension and retraction rod contacts the top of the anti-contraction spring to form an elastic structure.

[0013] Furthermore, the ends of the shock-absorbing hollow rod and the extension and contraction rod are respectively fixedly installed with top rotating blocks, and the inner surface of the auxiliary buffer rod contacts the outer surfaces of the first multi-layer contraction rod and the second multi-layer contraction rod to form a sliding structure. Moreover, the installation positions of the first multi-layer contraction rod and the second multi-layer contraction rod correspond to each other with respect to the auxiliary buffer rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: When the motorcycle anti-leakage shock absorber is subjected to external impact, the extension and contraction rod drives the sealing block to vertically contract along the inside of the shock absorber hollow rod. During this process, the impact contraction spring is squeezed to achieve a preliminary buffering effect. In addition, during the docking process, the concave sealing ring inside the top anti-leakage block will achieve a tighter docking and fit with the docking protrusion ring. This design makes the internal bearing capacity of the device stronger, improves the service life of the device, and improves the installation tightness of the internal damping fluid, thus improving the stability of the device in use.

[0015] Furthermore, when the shock-absorbing hollow rod and the extension and contraction rod retract and connect, the connecting rod will simultaneously squeeze and contract the first multi-layer contraction rod and the second multi-layer contraction rod inward through the first connecting rod to achieve auxiliary buffering again. This design allows the equipment to cope stably and calmly when encountering large drops or very bumpy roads, improving the driver's experience and enhancing the safety and stability of the equipment.

[0016] Furthermore, the side mounting blocks fixed to the outer surface of the shock-absorbing hollow rod make the installation and use of the equipment more convenient and efficient. At the same time, the interlocking design of the connecting protruding ring and the concave sealing ring makes the internal airtightness of the equipment stronger. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the shock-absorbing hollow rod of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the anti-contraction spring of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the side mounting block of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the sealing block of this utility model;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the second multi-layer retractable rod of this utility model;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the first multi-layer retractable rod of this utility model.

[0023] In the diagram: 1. Shock-absorbing hollow rod; 2. Extension and contraction rod; 3. Anti-contraction contraction spring; 4. Top rotating block; 5. Auxiliary buffer rod; 6. Top leak-proof block; 7. First connecting rod; 8. Rotating connecting rod; 9. Side mounting block; 10. Fitting sealing block; 11. Connecting protrusion ring; 12. Concave sealing ring; 13. First multi-layer contraction rod; 14. Second multi-layer contraction rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 2 , Figure 3 and Figure 4 This utility model provides the following technical solution: an oil-leakage-proof shock absorber for motorcycles, comprising a shock-absorbing hollow rod 1, a top anti-leakage block 6 installed on the top of the shock-absorbing hollow rod 1, and an elastic anti-leakage mechanism for improving the airtightness of the device installed inside the top anti-leakage block 6, such as... Figure 3 As shown, the elastic leak-proof mechanism includes an extension and contraction rod 2, which is slidably installed inside the top of the shock-absorbing hollow rod 1. The ends of the shock-absorbing hollow rod 1 and the extension and contraction rod 2 are equipped with a top rotating block 4, and the outer surface of the top rotating block 4 is equipped with a docking auxiliary mechanism for contracting the second multi-layer contraction rod 14.

[0026] like Figure 2 , Figure 3 and Figure 4 The technical solution shown addresses the problem that relying solely on a docking buffer design after radial compression and contraction increases the internal stress on the equipment, affecting its service life, and that the internal damping fluid is more prone to leakage at the docking point, reducing the equipment's strength. The solution discloses that: a sealing block 10 is installed at the lower end of the extension and contraction rod 2, and the outer surface of the sealing block 10 is fitted against the inner surface of the shock-absorbing hollow rod 1. Figure 4As shown, a side mounting block 9 is installed on the outer surface of the shock-absorbing hollow rod 1, and a concave sealing ring 12 is installed on the inner surface of the top leak-proof block 6. A mating protrusion ring 11 is installed on the top outer surface of the shock-absorbing hollow rod 1, and the downward position of the concave sealing ring 12 corresponds to the installation position of the mating protrusion ring 11. The installation position of the extension and contraction rod 2 passes through the interior of the top leak-proof block 6, and the mating surfaces of the mating protrusion ring 11 and the concave sealing ring 12 are correspondingly engaged. An abutting contraction spring 3 is installed on the outer surface of the extension and contraction rod 2, and the mating surfaces of the extension and contraction rod 2 and the top leak-proof block 6 respectively abut against the upper and lower ends of the abutting contraction spring 3. Moreover, the lower end of the extension and contraction rod 2 contacts the top of the abutting contraction spring 3 to form an elastic structure.

[0027] When riding a motorcycle on a bumpy road, the extension and retraction rod 2 is directly compressed radially, causing it to slide downwards along the top of the shock-absorbing hollow rod 1. The movement of the extension and retraction rod 2 synchronously moves the end-fixed sealing block 10 downwards, and the sealing block 10 moves synchronously downwards against the inner surface of the shock-absorbing hollow rod 1, resulting in a very stable and efficient cushioning effect. During the downward retraction of the extension and retraction rod 2, the abutment spring 3 nested on the outer surface is synchronously compressed downwards. Figure 4 As shown, as the lower end of the contact spring 3 contacts the top of the shock-absorbing hollow rod 1, the spring 3 will perform vertical contraction. During this process, the bearing force inside the shock-absorbing hollow rod 1 will gradually increase. At this time, the damping fluid inside the shock-absorbing hollow rod 1 will be squeezed and contracted. During the contraction and shock absorption process, the shock-absorbing hollow rod 1 will gradually push the docking protrusion ring 11 upward, making the docking of the docking protrusion ring 11 and the external concave sealing ring 12 more stable. Since the concave sealing ring 12 is nested and fixedly installed inside the top anti-leakage block 6, and the top anti-leakage block 6 is also fixedly installed outside the shock-absorbing hollow rod 1, this design makes the use of the equipment more efficient and stable.

[0028] Example 2: Figure 1 , Figure 5 and Figure 6 The technical solution shown addresses the problem that existing designs cannot stably and calmly handle large drops or very bumpy road surfaces, resulting in a very uncomfortable driving experience and significantly reduced cushioning effect, leading to equipment fatigue and insufficient safety and stability. The solution discloses a docking auxiliary mechanism including an auxiliary buffer rod 5, with the installation position of the auxiliary buffer rod 5 opposite to that of the side mounting block 9. A first multi-layer retractable rod 13 is installed on the top of the inner surface of the auxiliary buffer rod 5. Figure 5As shown, a rotating connecting rod 8 is installed on the outer surface of the top rotating block 4, and a first docking rod 7 is installed on the other end of the rotating connecting rod 8. The first docking rod 7 is fixedly installed on the top of the first multi-layer shrinking rod 13. A second multi-layer shrinking rod 14 is installed on the lower end of the inner surface of the auxiliary buffer rod 5, and the first docking rod 7 and the rotating connecting rod 8 are also installed on the lower end of the second multi-layer shrinking rod 14. The top rotating block 4 is fixedly installed on the ends of the shock-absorbing hollow rod 1 and the extension shrinking rod 2 respectively. The inner surface of the auxiliary buffer rod 5 contacts the outer surface of the first multi-layer shrinking rod 13 and the second multi-layer shrinking rod 14 to form a sliding structure. The installation positions of the first multi-layer shrinking rod 13 and the second multi-layer shrinking rod 14 correspond to each other with respect to the auxiliary buffer rod 5.

[0029] During the docking and retraction process of the shock-absorbing hollow rod 1 and the extension and contraction rod 2, the top rotating block 4, which is fixedly installed at the end of the shock-absorbing hollow rod 1 and the extension and contraction rod 2, will be driven inward synchronously. The movement of the top rotating block 4 will synchronously drive the rotating connecting rod 8, which is rotatably installed on the outer surface of the end, and generate rotation. Under the traction of the rotating connecting rod 8, the first docking rod 7, which is also rotatably installed inside the other end of the rotating connecting rod 8, will move downward synchronously. The movement of the first docking rod 7 will drive the first multi-layer contraction rod 13, which is fixedly installed at the end, to move again. At this time, the outer surface of the first multi-layer contraction rod 13 will continue to be in contact with the inner surface of the auxiliary buffer rod 5. Figure 6 As shown, since the top rotating block 4, the first docking rod 7 and the rotating connecting rod 8 are symmetrically installed in two sets about the center point of the auxiliary buffer rod 5, and the lower set of the top rotating block 4, the first docking rod 7 and the rotating connecting rod 8 are fixedly installed with the second multi-layer shrinking rod 14, as the shock-absorbing hollow rod 1 and the extended shrinking rod 2 are docked, the first multi-layer shrinking rod 13 and the second multi-layer shrinking rod 14 will be mutually squeezed and docked inside the auxiliary buffer rod 5. This design improves the buffering effect of the equipment.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof shock absorber for motorcycles, comprising a shock-absorbing hollow rod (1), wherein a top leak-proof block (6) is mounted on the top of the shock-absorbing hollow rod (1), characterized in that: The top leak-proof block (6) is equipped with an elastic leak-proof mechanism to improve the airtightness of the equipment. The elastic leak-proof mechanism includes an extension and contraction rod (2), which is slidably installed inside the top of the shock-absorbing hollow rod (1). The ends of the shock-absorbing hollow rod (1) and the extension and contraction rod (2) are equipped with a top rotating block (4), and the outer surface of the top rotating block (4) is equipped with a docking auxiliary mechanism for contracting the second multi-layer contraction rod (14).

2. The anti-leakage shock absorber for motorcycles according to claim 1, characterized in that: The docking auxiliary mechanism includes an auxiliary buffer rod (5), and the installation position of the auxiliary buffer rod (5) is opposite to the installation position of the side mounting block (9). A first multi-layer shrink rod (13) is installed on the top of the inner surface of the auxiliary buffer rod (5), and a rotating connecting rod (8) is installed on the outer surface of the top rotating block (4).

3. The oil-leakage-proof shock absorber for motorcycles according to claim 2, characterized in that: The other end of the rotating connecting rod (8) is equipped with a first docking rod (7), and the first docking rod (7) is fixedly installed on the top of the first multi-layer shrinking rod (13). The lower end of the inner surface of the auxiliary buffer rod (5) is equipped with a second multi-layer shrinking rod (14), and the lower end of the second multi-layer shrinking rod (14) is also equipped with the first docking rod (7) and the rotating connecting rod (8).

4. The anti-leakage shock absorber for motorcycles according to claim 1, characterized in that: The lower end of the extension and contraction rod (2) is fitted with a sealing block (10), and the outer surface of the sealing block (10) is fitted with the inner surface of the shock-absorbing hollow rod (1). The outer surface of the shock-absorbing hollow rod (1) is fitted with a side mounting block (9), and the inner surface of the top leak-proof block (6) is fitted with a concave sealing ring (12).

5. A leak-proof shock absorber for motorcycles according to claim 4, characterized in that: The top outer surface of the shock-absorbing hollow rod (1) is fitted with a mating protrusion ring (11), and the downward position of the concave sealing ring (12) corresponds to the installation position of the mating protrusion ring (11). The installation position of the extension and contraction rod (2) passes through the interior of the top leak-proof block (6), and the mating surfaces of the mating protrusion ring (11) and the concave sealing ring (12) mesh with each other.

6. A leak-proof shock absorber for motorcycles according to claim 5, characterized in that: The outer surface of the extension and contraction rod (2) is fitted with an anti-contraction spring (3), and the mating surfaces of the extension and contraction rod (2) and the top anti-leakage block (6) respectively abut against the upper and lower ends of the anti-contraction spring (3), and the lower end of the extension and contraction rod (2) contacts the top of the anti-contraction spring (3) to form an elastic structure.

7. A leak-proof shock absorber for motorcycles according to claim 3, characterized in that: The ends of the shock-absorbing hollow rod (1) and the extension and contraction rod (2) are respectively fixedly installed with top rotating blocks (4), and the inner surface of the auxiliary buffer rod (5) contacts the outer surface of the first multi-layer contraction rod (13) and the second multi-layer contraction rod (14) to form a sliding structure. Moreover, the installation positions of the first multi-layer contraction rod (13) and the second multi-layer contraction rod (14) correspond to each other with respect to the auxiliary buffer rod (5).

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