Hydraulic twin-tube shock absorber

Abstract

This utility model belongs to the field of vibration damper technology, and more particularly to a hydraulic twin-cylinder vibration damper, including a vibration damper body, in which a piston rod is provided. This utility model uses a sealing cover to completely enclose the sealing ring, providing excellent physical protection and preventing external dust and impurities from entering the area where the sealing ring is located. The sealing ring seals the sliding joint between the vibration damper body and the piston rod, preventing leakage. When replacing the sealing ring after a long period of time, rotating the annular plate drives the internal gear ring to rotate. The internal gear ring drives the lead screw to rotate via gears. The lead screw drives the sealing cover to move via an L-shaped rod, causing the sealing cover to gradually move away from the top of the vibration damper body. The sealing ring is then removed, and a new sealing ring is fitted onto the piston rod, positioned at the top of the vibration damper body. The annular plate is then rotated in the opposite direction, and the sealing cover completely covers the new sealing ring at the top of the vibration damper body for secure installation. This facilitates quick sealing ring replacement and improves efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, specifically to a hydraulic double-cylinder vibration damper. Background Technology

[0002] In many fields such as automobiles and construction machinery, shock absorbers, as key components of suspension systems, play a crucial role in ensuring the smoothness, comfort, and handling stability of vehicles. Among them, hydraulic twin-tube shock absorbers have been widely used in the market due to their structural characteristics and working principle.

[0003] In some existing hydraulic twin-tube shock absorbers, the area where the piston rod slides into contact with the top of the shock absorber is prone to seal failure due to the frequent reciprocating motion of the piston rod, the complex mechanical environment it experiences during operation, and the high pressure of the hydraulic oil. This leads to hydraulic oil leakage, which directly weakens the shock absorber's damping effect. To address this issue, some existing hydraulic twin-tube shock absorbers have installed sealing rings at the top of the shock absorber, attempting to seal the piston rod against the top of the shock absorber and prevent hydraulic oil leakage. However, these sealing rings cannot be quickly replaced in practical applications. When the sealing rings need to be replaced due to wear or aging, maintenance personnel often need to spend a lot of time and effort on disassembly and installation. This not only increases the difficulty and workload of maintenance but also prolongs vehicle maintenance time, reduces maintenance efficiency, and causes many inconveniences for users. Therefore, we propose the hydraulic twin-tube shock absorber to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hydraulic twin-cylinder shock absorber, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A hydraulic twin-tube shock absorber includes a shock absorber body. A piston rod is housed within the shock absorber body, with its top end extending outside the shock absorber body. A circular ring plate is rotatably connected to the shock absorber body, and an internal gear ring is fixedly connected to the top of the circular ring plate. Support blocks are welded to both sides of the shock absorber body, and lead screws are rotatably connected to the support blocks. A gear is welded to the end of the lead screw, meshing with the internal gear ring. An L-shaped rod is threaded onto the lead screw, and a common sealing cover is welded between two L-shaped rods. The sealing cover is in movable contact with the top of the shock absorber body. A sealing ring is provided on the top of the shock absorber body, engaging with the sealing cover. Sliding grooves are formed on both sides of the shock absorber body, and sliders are slidably connected to these grooves. One side of the slider is fixedly connected to the inner wall of the corresponding L-shaped rod.

[0007] Furthermore, a circular hole is provided on the top inner wall of the sealing cover, and the sealing cover is slidably connected to the piston rod through the circular hole.

[0008] Furthermore, a connecting block is welded to one side of one of the two support blocks, and a T-shaped rod is provided on the connecting block.

[0009] Furthermore, a spring is welded between one inner wall of the T-shaped rod and one side of the connecting block, and the spring is movably sleeved on the T-shaped rod.

[0010] Furthermore, the annular plate has multiple slots arranged in a ring shape, and the T-shaped rod is engaged with one of the slots.

[0011] Furthermore, the connecting block is provided with a guide hole, and the connecting block is slidably connected to the T-shaped rod through the guide hole.

[0012] Compared with the prior art, this utility model provides a hydraulic twin-cylinder shock absorber, which has the following beneficial effects:

[0013] This invention completely covers the sealing ring on the top of the shock absorber body with a sealing cover, providing excellent physical protection for the sealing ring and preventing external dust and impurities from entering the sealing area and affecting the sealing effect. It also prevents damage to the sealing ring from accidental impacts. The sealing ring seals the sliding joint between the shock absorber body and the piston rod, preventing leakage. After a long period of time, rotating the annular plate drives the internal gear ring to rotate. The internal gear ring drives the lead screw to rotate via gears. The lead screw, through an L-shaped rod, moves the sealing cover away from the top of the shock absorber body. The original sealing ring is then removed, and a new sealing ring is fitted onto the piston rod at the top of the shock absorber body. The annular plate is then rotated in the opposite direction, and the sealing cover completely covers the new sealing ring on the top of the shock absorber body for secure installation. This facilitates quick sealing ring replacement and improves efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the sealing cover of this utility model after it is concealed.

[0016] Figure 3 This is a schematic diagram of the inclined three-dimensional structure of the shock absorber body of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the cut-out body of the vibration damper of this utility model;

[0018] Figure 5 This is a partial three-dimensional structural diagram of the present invention.

[0019] In the diagram: 1. Shock absorber body; 2. Piston rod; 3. Circular ring plate; 4. Internal gear ring; 5. Support block; 6. Lead screw; 7. Gear; 8. L-shaped rod; 9. Sealing cover; 10. Sealing ring; 11. Slide groove; 12. Slider; 13. Connecting block; 14. T-shaped rod; 15. Spring; 16. Slot. Detailed Implementation

[0020] 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. Example

[0021] like Figure 1-5 As shown, an embodiment of the present invention discloses a hydraulic double-cylinder shock absorber, comprising a shock absorber body 1, a piston rod 2 inside the shock absorber body 1, the top end of the piston rod 2 extending outside the shock absorber body 1, a circular ring plate 3 rotatably connected to the shock absorber body 1, an internal gear ring 4 fixedly connected to the top of the circular ring plate 3, support blocks 5 welded to both sides of the shock absorber body 1, a lead screw 6 rotatably connected to the support blocks 5, a gear 7 welded to the end of the lead screw 6, the gear 7 meshing with the internal gear ring 4, an L-shaped rod 8 threadedly connected to the lead screw 6, a common sealing cover 9 welded between the two L-shaped rods 8, the sealing cover 9 in movable contact with the top of the shock absorber body 1, a sealing ring 10 provided on the top of the shock absorber body 1, the sealing ring 10 engaging with the sealing cover 9, a sliding groove 11 opened on both sides of the shock absorber body 1, a slider 12 slidably connected to the sliding groove 11, one side of the slider 12 fixedly connected to the inner wall of one side of the corresponding L-shaped rod 8, the sealing cover 9 damping the shock absorber body 1. The sealing ring 10 on the top of the damper body 1 is completely covered by the sealing cover 9, which provides good physical protection for the sealing ring 10, preventing external dust and impurities from entering the area where the sealing ring 10 is located and affecting the sealing effect. It also prevents the sealing ring 10 from being damaged by accidental collisions. The sealing ring 10 seals the sliding part between the damper body 1 and the piston rod 2 to prevent leakage. After a long time, rotating the annular plate 3 drives the internal gear ring 4 to rotate. The internal gear ring 4 drives the lead screw 6 to rotate through the gear 7. The lead screw 6 drives the sealing cover 9 to move through the L-shaped rod 8, so that the sealing cover 9 gradually moves away from the top of the damper body 1. Then the sealing ring 10 is removed, and a new sealing ring 10 is fitted onto the piston rod 2 and located on the top of the damper body 1. Then the annular plate 3 is rotated in the opposite direction, and the sealing cover 9 completely covers the new sealing ring 10 on the top of the damper body 1 for locking, which facilitates quick replacement of the sealing ring 10 and improves efficiency.

[0022] In some embodiments, a circular hole is provided on the top inner wall of the sealing cover 9, and the sealing cover 9 is slidably connected to the piston rod 2 through the circular hole. The sealing cover 9 serves to seal the surface.

[0023] In some embodiments, a connecting block 13 is welded to one side of one of the two support blocks 5, and a T-shaped rod 14 is provided on the connecting block 13.

[0024] In some embodiments, a spring 15 is welded between one inner wall of the T-shaped rod 14 and one side of the connecting block 13. The spring 15 is movably sleeved on the T-shaped rod 14, and the spring 15 serves to reset the rod.

[0025] In some embodiments, the annular plate 3 has a plurality of slots 16 arranged in a ring shape, and the T-shaped rod 14 is engaged with one of the slots 16.

[0026] In some embodiments, the connecting block 13 is provided with a guide hole, and the connecting block 13 is slidably connected to the T-shaped rod 14 through the guide hole.

[0027] In operation, the sealing cover 9 completely covers the sealing ring 10 on top of the shock absorber body 1, providing good physical protection for the sealing ring 10 and preventing external dust and impurities from entering the area where the sealing ring 10 is located, thus affecting the sealing effect. It also prevents the sealing ring 10 from being damaged by accidental impacts. The sealing ring 10 seals the sliding joint between the shock absorber body 1 and the piston rod 2, preventing leakage. When the sealing ring 10 needs to be replaced after a long period of time, the T-shaped rod 14 is pulled. During the movement, the T-shaped rod 14 stretches the spring 15, causing it to separate from one of the multiple slots 16. Then, the annular plate 3 rotates, driving the internal gear ring 4 to rotate. The internal gear ring 4, through the gear 7, drives the lead screw 6 to rotate. The lead screw 6 then drives... The corresponding L-shaped rod 8 moves, causing the corresponding slider 12 to slide on the groove 11. At the same time, the L-shaped rod 8 causes the sealing cover 9 to move, gradually moving the sealing cover 9 away from the top of the shock absorber body 1, making room for the replacement of the sealing ring 10. The sealing ring 10 is then removed and replaced. The new sealing ring 10 is placed on the piston rod 2 and positioned on the top of the shock absorber body 1. The annular plate 3 is then rotated in the opposite direction, and the sealing cover 9 completely covers the new sealing ring 10 on the top of the shock absorber body 1 for locking, thus facilitating quick replacement of the sealing ring 10 and improving efficiency. After fixing, the force on the T-shaped rod 14 is released, and the spring 15, which is in a stretched state, returns to its original position. The spring 15 drives the T-shaped rod 14 to engage with another slot 16 among the multiple slots 16, thereby fixing the annular plate 3 and preventing accidental rotation.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A hydraulic twin-tube shock absorber, comprising a shock absorber body (1), characterized in that: The damper body (1) is provided with a piston rod (2), the top end of the piston rod (2) extends to the outside of the damper body (1), a circular ring plate (3) is rotatably connected to the damper body (1), an internal gear ring (4) is fixedly connected to the top of the circular ring plate (3), support blocks (5) are welded to both sides of the damper body (1), a lead screw (6) is rotatably connected to the support block (5), a gear (7) is welded to the end of the lead screw (6), the gear (7) meshes with the internal gear ring (4), and a screw is threaded on the lead screw (6). The damper body (1) is connected by an L-shaped rod (8), and the two L-shaped rods (8) are welded together with the same sealing cover (9). The sealing cover (9) is in contact with the top of the damper body (1). The top of the damper body (1) is provided with a sealing ring (10). The sealing ring (10) is engaged with the sealing cover (9). The damper body (1) has a sliding groove (11) on both sides. A slider (12) is slidably connected to the sliding groove (11). One side of the slider (12) is fixedly connected to the inner wall of one side of the corresponding L-shaped rod (8).

2. The hydraulic twin-tube shock absorber according to claim 1, characterized in that: A circular hole is provided on the top inner wall of the sealing cover (9), and the sealing cover (9) is slidably connected to the piston rod (2) through the circular hole.

3. The hydraulic twin-tube shock absorber according to claim 2, characterized in that: A connecting block (13) is welded to one side of one of the two support blocks (5), and a T-shaped rod (14) is provided on the connecting block (13).

4. The hydraulic twin-tube shock absorber according to claim 3, characterized in that: A spring (15) is welded between one side of the inner wall of the T-shaped rod (14) and one side of the connecting block (13), and the spring (15) is movably sleeved on the T-shaped rod (14).

5. The hydraulic twin-tube shock absorber according to claim 4, characterized in that: The annular plate (3) has multiple slots (16) arranged in a ring shape, and the T-shaped rod (14) is engaged with one of the slots (16).

6. The hydraulic twin-tube shock absorber according to claim 5, characterized in that: The connecting block (13) has a guide hole, and the connecting block (13) is slidably connected to the T-shaped rod (14) through the guide hole.

Images