A dual-circulation hydraulic shock absorber

Abstract

This utility model relates to the technical field of dual-circulation hydraulic shock absorbers, specifically a dual-circulation hydraulic shock absorber, including a movable frame, a buffer frame mounted on the surface of the movable frame, and a replacement device on the surface of the buffer frame. The replacement device includes a support sleeve, which is fixedly connected to the surface of the buffer frame. An oil storage tank is formed inside the support sleeve, and a guide groove is formed between the buffer frame and the oil storage tank, located below the movable frame. A push rod is slidably connected inside the support sleeve, and a piston block is fixedly connected to one end of the push rod. The piston block is slidably connected to the inside of the oil storage tank. A feeding assembly and a discharging assembly are provided on the surface of the support sleeve. This utility model, by incorporating the replacement device, can effectively replace the hydraulic fluid, avoiding the presence of large amounts of impurities in the hydraulic fluid inside the shock absorber, thereby reducing the problem of blockage in the internal oil passages of the shock absorber.

Description

Technical Field

[0001] This utility model relates to the technical field of dual-circulation hydraulic shock absorbers, and in particular to a dual-circulation hydraulic shock absorber. Background Technology

[0002] The dual-circulation hydraulic shock absorber is a shock-absorbing device consisting of two cylinders, an inner and an outer cylinder. It achieves vibration reduction by generating hydraulic damping force when the piston moves in the inner cylinder. Its core structure includes four valves to maintain the oil balance in the inner cylinder and suppress vibration impact. The dual-circulation hydraulic shock absorber is suitable for scenarios that need to cope with high-frequency, large-amplitude vibration impact, such as rail transit vehicles, heavy machinery, and large engineering equipment. It efficiently attenuates vibration through dual-circulation oil circuits, improving operational stability and safety.

[0003] When workers need to dampen equipment, they install shock absorbers on the equipment to absorb vibrations. However, during use, existing shock absorbers may experience wear over time, causing the oil inside to contain a large amount of impurities, which can lead to blockages in the oil passages inside the shock absorber. Utility Model Content

[0004] The purpose of this invention is to solve the problem of blockage in the oil circuit inside the shock absorber in the prior art, and to propose a dual-circulation hydraulic shock absorber.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a dual-circulation hydraulic shock absorber, comprising a movable frame, a buffer frame mounted on the surface of the movable frame, a replacement device provided on the surface of the buffer frame, the replacement device comprising a support sleeve, the support sleeve being fixedly connected to the surface of the buffer frame, an oil storage tank being provided inside the support sleeve, a guide groove being provided between the buffer frame and the oil storage tank, the guide groove being located below the movable frame, a push rod being slidably connected inside the support sleeve, a piston block being fixedly connected to one end of the push rod, the piston block being slidably connected to the inside of the oil storage tank, a feeding assembly and a discharging assembly being provided on the surface of the support sleeve, the feeding assembly comprising a feeding pipe, the feeding pipe being opened on the surface of the support sleeve, the feeding pipe communicating with the oil storage tank, a first sealing cap being threadedly connected to the surface of the feeding pipe, the feeding pipe being able to cooperate with the support sleeve to guide the oil into the oil storage tank.

[0006] Preferably, the feeding assembly includes a feeding pipe, which is opened on the surface of the support sleeve and communicates with the oil storage tank. A second sealing cap is threadedly connected to the surface of the feeding pipe, and the second sealing cap is located on one side of the first sealing cap. The feeding pipe can cooperate with the oil storage tank to guide the oil into the oil storage tank.

[0007] Preferably, one end of the push rod is provided with a positioning device, the positioning device including a socket, the socket being formed on the surface of the push rod, the socket being able to cooperate with the push rod to guide the threaded rod to slide.

[0008] Preferably, a threaded rod is inserted into the socket, the threaded rod is located on one side of the support sleeve, and the threaded rod can cooperate with the socket to achieve the purpose of supporting the threaded rod.

[0009] Preferably, an adjusting block is fixedly connected to one end of the threaded rod. The adjusting block is located on one side of the support sleeve. The adjusting block can cooperate with the threaded rod to facilitate the worker in adjusting the rotation of the threaded rod.

[0010] Preferably, a threaded hole is provided on one side of the support sleeve, and the threaded rod is connected to the internal thread of the threaded hole. The threaded hole can cooperate with the support sleeve to achieve the purpose of accommodating the threaded rod.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, by setting up a replacement device, when the worker needs to change the oil, the worker adjusts the positioning device, which releases the restraint on the push rod. The oil pushes the piston block, which in turn pushes the push rod. When the piston block slides to the position between the discharge pipe and the feed pipe, the worker temporarily restricts the piston block's movement. The worker then rotates the second sealing cap, and connects an external suction pump to the discharge pipe, releasing the temporary restriction on the piston block. When the piston block slides to the designated position, the suction pump can quickly extract the oil. The worker then closes the discharge pipe, pushes the push rod, and the push rod pushes the piston block, which slides to the position of the feed pipe. The worker then rotates the first sealing cap, which opens the feed pipe. The worker then connects the external oil injector to the feed pipe. After connecting the pipes, the operator adjusts the piston block to slide to the designated position. Then, the oil injection machine injects oil into the inside of the shock absorber. When a certain amount of oil is injected, the operator pushes the push rod, which pushes the piston block. The piston block slides to the position of the feed pipe and blocks the feed pipe. The operator then disassembles the oil injection machine and installs the first sealing cap. The operator continues to push the push rod, which pushes the piston block. The piston block squeezes the oil into the guide groove, which guides the oil into the buffer frame. When one end of the push rod abuts against the surface of the support sleeve, the operator adjusts the positioning device. The positioning device restricts the push rod. By setting up a replacement device, the oil can be effectively replaced, avoiding the presence of a large amount of impurities in the oil inside the shock absorber, thereby reducing the problem of blockage in the oil passages inside the shock absorber.

[0012] In this invention, by setting a positioning device, when the worker needs to limit the push rod, the worker inserts the threaded rod into the insertion hole, and the threaded rod abuts against the surface of the threaded hole. The worker rotates the adjusting block, and the adjusting block drives the threaded rod to connect with the internal thread of the threaded hole. The adjusting block tightens and squeezes the push rod and the surface of the support sleeve to fit tightly. By setting a positioning device, oil leakage can be effectively reduced, and oil can be prevented from filling the oil tank, which is conducive to the worker changing the oil. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of a dual-circulation hydraulic shock absorber is provided for this utility model; Figure 2 This utility model provides a schematic diagram of the replacement device structure for a dual-circulation hydraulic shock absorber; Figure 3 This invention proposes a dual-circulation hydraulic shock absorber. Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This utility model provides a schematic diagram of the positioning device structure for a dual-circulation hydraulic shock absorber; Figure 5 This invention proposes a dual-circulation hydraulic shock absorber. Figure 4 Enlarged structural diagram at point B.

[0014] Legend: 1. Movable frame; 2. Buffer frame; 3. Changing device; 31. Guide groove; 32. Oil storage tank; 33. Support sleeve; 34. Feed pipe; 35. Second sealing cap; 36. Feed pipe; 37. First sealing cap; 38. Piston block; 39. Push rod; 4. Positioning device; 41. Adjusting block; 42. Insertion hole; 43. Threaded rod; 44. Threaded hole. Detailed Implementation

[0015] Please see Figures 1-5 This utility model provides a technical solution: a dual-circulation hydraulic shock absorber, including a movable frame 1, a buffer frame 2 installed on the surface of the movable frame 1, and a replacement device 3 provided on the surface of the buffer frame 2.

[0016] The specific setup and function of the replacement device 3 and the positioning device 4 will be explained in detail below.

[0017] In this embodiment: the replacement device 3 includes a support sleeve 33, which is fixedly connected to the surface of the buffer frame 2. An oil storage tank 32 is provided inside the support sleeve 33. A guide groove 31 is provided between the buffer frame 2 and the oil storage tank 32. The guide groove 31 is located below the movable frame 1. A push rod 39 is slidably connected inside the support sleeve 33. A piston block 38 is fixedly connected to one end of the push rod 39. The piston block 38 is slidably connected to the inside of the oil storage tank 32. A feeding assembly and a discharging assembly are provided on the surface of the support sleeve 33.

[0018] Specifically, the feeding assembly includes a feeding pipe 36, which is opened on the surface of the support sleeve 33. The feeding pipe 36 communicates with the oil storage tank 32. A first sealing cap 37 is threadedly connected to the surface of the feeding pipe 36. The feeding pipe 36 can cooperate with the support sleeve 33 to guide the oil into the oil storage tank 32.

[0019] Specifically, the feeding assembly includes a feeding pipe 34, which is opened on the surface of the support sleeve 33. The feeding pipe 34 is connected to the oil storage tank 32. A second sealing cap 35 is threadedly connected to the surface of the feeding pipe 34. The second sealing cap 35 is located on one side of the first sealing cap 37.

[0020] In this embodiment, the feed pipe 34 can cooperate with the oil storage tank 32 to guide the oil into the oil storage tank 32.

[0021] In this embodiment, a positioning device 4 is provided at one end of the push rod 39. The positioning device 4 includes a socket 42, which is formed on the surface of the push rod 39. The socket 42 can cooperate with the push rod 39 to guide the threaded rod 43 to slide.

[0022] Specifically, a threaded rod 43 is inserted and connected inside the insertion hole 42, and the threaded rod 43 is located on one side of the support sleeve 33.

[0023] In this embodiment, the threaded rod 43 can be engaged with the insertion hole 42 to support the threaded rod 43.

[0024] Specifically, an adjusting block 41 is fixedly connected to one end of the threaded rod 43. The adjusting block 41 is located on one side of the support sleeve 33. The adjusting block 41 can cooperate with the threaded rod 43 to facilitate the worker in adjusting the rotation of the threaded rod 43.

[0025] Specifically, a threaded hole 44 is provided on one side of the support sleeve 33, and the threaded rod 43 is connected to the internal thread of the threaded hole 44.

[0026] In this embodiment, the threaded hole 44 can cooperate with the support sleeve 33 to achieve the purpose of accommodating the threaded rod 43.

[0027] Working principle: By setting the replacement device 3, when the operator needs to change the oil, the operator adjusts the positioning device 4. The positioning device 4 releases the restraint on the push rod 39, and the oil pushes the piston block 38. The piston block 38 pushes the push rod 39. When the piston block 38 slides to the position between the discharge pipe 34 and the feed pipe 36, the operator temporarily restricts the sliding of the piston block 38. By rotating the second sealing cap 35, the operator connects the external suction pump to the discharge pipe 34, releasing the temporary restriction on the piston block 38. When the piston block 38 slides to the designated position, the suction pump can quickly... The oil is extracted, and then the worker closes the feed pipe 34. The worker pushes the push rod 39, which pushes the piston block 38. The piston block 38 slides to the position of the feed pipe 36. The worker rotates the first sealing cap 37, which opens the feed pipe 36. The worker connects the external oil injection machine to the feed pipe 36. The worker adjusts the piston block 38 to slide to the designated position. Then, the oil injection machine injects oil into the inside of the shock absorber. When a certain amount of oil is injected, the worker pushes the push rod 39, which pushes the piston block 38. The piston block 38 slides to the position of the feed pipe 36. At the designated position, piston block 38 blocks the feed pipe 36. The operator disassembles the oil injection machine and installs the first sealing cap 37. Subsequently, the operator continues to push push rod 39, which pushes piston block 38. Piston block 38 squeezes oil into guide groove 31, which guides the oil into buffer frame 2. When one end of push rod 39 abuts against the surface of support sleeve 33, the operator adjusts positioning device 4. Positioning device 4 restricts push rod 39. By setting replacement device 3, oil can be effectively replaced, avoiding the oil inside the shock absorber containing a large amount of impurities, thereby reducing the damping effect. The internal oil passage of the device is blocked. In addition, by setting the positioning device 4, when the operator needs to limit the push rod 39, the operator inserts the threaded rod 43 into the insertion hole 42. The threaded rod 43 abuts against the surface of the threaded hole 44. The operator rotates the adjusting block 41, which drives the threaded rod 43 to connect with the internal thread of the threaded hole 44. The adjusting block 41 tightens and squeezes the push rod 39 and the support sleeve 33 to fit tightly. By setting the positioning device 4, oil leakage can be effectively reduced, and oil can be prevented from filling the oil storage tank 32, which makes it easier for the operator to change the oil.

Claims

1. A dual-circuit oil hydraulic shock absorber comprising a movable bracket (1), characterized by: The surface of the movable frame (1) is provided with a buffer frame (2); The surface of the buffer frame (2) is provided with a replacement device (3), the replacement device (3) comprises a supporting sleeve (33), and the supporting sleeve (33) is fixedly connected with the surface of the buffer frame (2); An oil storage groove (32) is arranged in the supporting sleeve (33), a guide groove (31) is arranged between the buffer frame (2) and the oil storage groove (32), the guide groove (31) is located below the movable frame (1), a push rod (39) is slidably connected in the supporting sleeve (33), one end of the push rod (39) is fixedly connected with a piston block (38), the piston block (38) is slidably connected with the inside of the oil storage groove (32), and the surface of the supporting sleeve (33) is provided with a feeding assembly and a discharging assembly.

2. A dual-acting hydraulic shock absorber according to claim 1, characterized in that: The feeding assembly comprises a feeding pipe (36), the feeding pipe (36) is arranged on the surface of the supporting sleeve (33), the feeding pipe (36) is communicated with the oil storage groove (32), and the surface of the feeding pipe (36) is screw-connected with a first sealing cap (37).

3. A dual-acting hydraulic shock absorber according to claim 1, wherein: The discharging assembly comprises a discharging pipe (34), the discharging pipe (34) is arranged on the surface of the supporting sleeve (33), and the discharging pipe (34) is communicated with the oil storage groove (32).

4. A dual-acting hydraulic shock absorber according to claim 3, characterized in that: The surface of the discharging pipe (34) is screw-connected with a second sealing cap (35), and the second sealing cap (35) is located on one side of the first sealing cap (37).

5. A dual-acting hydraulic shock absorber according to claim 1, wherein: One end of the push rod (39) is provided with a positioning device (4), the positioning device (4) comprises a bushing (42), and the bushing (42) is arranged on the surface of the push rod (39).

6. A dual-acting hydraulic shock absorber according to claim 5, characterized in that: A threaded rod (43) is insertedly connected in the bushing (42), and the threaded rod (43) is located on one side of the supporting sleeve (33).

7. A dual-acting hydraulic shock absorber according to claim 6, characterized in that: One end of the threaded rod (43) is fixedly connected with an adjusting block (41), and the adjusting block (41) is located on one side of the supporting sleeve (33).

8. A dual-acting hydraulic shock absorber according to claim 7, characterized in that: One side of the supporting sleeve (33) is provided with a threaded hole (44), and the threaded rod (43) is screw-connected with the inside of the threaded hole (44).

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