Hydraulic damper with adjustable damping force value

Abstract

The utility model relates to the technical field of hydraulic dampers, in particular to a hydraulic damper with an adjustable damping force value, which comprises an outer cylinder, an inner cylinder is arranged at the bottom end inside the outer cylinder, the bottom end of the outer wall of the inner cylinder is fixed with the inner wall of the outer cylinder through a cushion block, and the inner wall of the inner cylinder is connected with a sliding rod in a sliding mode. The bottom end of the inner wall of the inner cylinder is provided with an oil control component used for controlling the amount of hydraulic oil, the outflow path of the hydraulic oil can be limited through the arranged base and the arranged upper cover, and the hydraulic oil can be controlled to enter and exit from the inner cylinder through the formed oil control groove. And the flow speed of hydraulic oil passing through the oil control grooves can be adjusted by moving the wedge-shaped oil control blocks up and down on the inner walls of the oil control grooves, and the multiple oil control grooves and the multiple wedge-shaped oil control blocks are arranged, so that the adjusting range of the damping force value of the hydraulic damper can be widened, and personnel can conduct finer adjustment according to the damping force value.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic damper technology, specifically to a hydraulic damper with adjustable damping force. Background Technology

[0002] A hydraulic damper, also known as a hydraulic shock absorber, is a device that uses the flow resistance of a fluid (usually oil) to control speed and reduce vibration. It is widely used in automotive suspension systems, mechanical vibration control, and industrial automation.

[0003] Existing hydraulic dampers often have fixed damping values ​​during use. Therefore, Chinese Patent Publication No. CN218510066U discloses a hydraulic damper with adjustable damping force. In this patented technology, the oil drain adjustment device adjusts the flow speed of the hydraulic oil inside the hydraulic cylinder to adjust the resistance encountered by the piston moving inside the hydraulic cylinder, thereby indirectly adjusting the damping force of the hydraulic damper with adjustable damping force.

[0004] However, as can be seen from the specification and accompanying drawings of the patent technology, the above-mentioned patent technology mainly adjusts the flow rate of hydraulic oil by rotating the threaded rod and valve core, thereby adjusting the damping value. However, if this method is to ensure the damping adjustment range of the damper, the opening of the bottom valve needs to be very large. This method can easily lead to a large valve adjustment opening, resulting in discontinuous or insufficiently fine changes in damping force and a lack of linear response. Therefore, it has certain shortcomings.

[0005] In conclusion, it is necessary to invent a hydraulic damper with adjustable damping force. Utility Model Content

[0006] Therefore, this utility model provides a hydraulic damper with adjustable damping force to solve the problem that this method can easily lead to a large valve adjustment opening, resulting in discontinuous or insufficiently fine changes in damping force and a lack of linear response.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic damper with adjustable damping force, comprising an outer cylinder, an inner cylinder provided at the bottom of the inner cylinder, the bottom of the outer wall of the inner cylinder being fixed to the inner wall of the outer cylinder by a pad, a sliding rod being slidably connected to the inner wall of the inner cylinder, and an oil control component for controlling the hydraulic oil volume being provided at the bottom of the inner wall of the inner cylinder.

[0008] The oil control component includes a base, which is installed on the top of the inner wall of the inner cylinder. A top cover is provided on the top of the outer wall of the base, and an oil control mechanism is provided between the base and the top cover.

[0009] Preferably, an upper connecting seat is provided above the top of the outer wall of the slide rod, and a lower connecting seat for installation is connected to the bottom of the outer wall of the outer cylinder.

[0010] Preferably, a first return spring is sleeved on the outer wall of the slide rod and between the top of the upper connecting seat and the outer wall of the outer cylinder. The bottom end of the slide rod passes through the top of the inner wall of the inner cylinder and is fixed with an upper piston. A lower piston is provided on the inner wall of the inner cylinder below the upper piston.

[0011] Preferably, the oil control mechanism is a first wedge-shaped oil control block, and multiple first wedge-shaped oil control blocks are integrally fixed at a suitable position on the bottom of the outer wall of the upper cover. The top of the outer wall of the base and the position corresponding to the first wedge-shaped oil control block are all provided with a first oil control groove.

[0012] Preferably, the outer wall of the first wedge-shaped oil control block is slidably connected to the inner wall of the first oil control groove. A through hole is provided at the bottom of the outer wall of the inner cylinder and at the position corresponding to the first oil control groove. An adjusting bolt is threadedly connected at the bottom of the outer wall of the outer cylinder and at the position corresponding to the first wedge-shaped oil control block. The upper end of the adjusting bolt passes through the bottom of the inner wall of the outer cylinder and the through hole and abuts against the bottom of the outer wall of the first wedge-shaped oil control block.

[0013] Preferably, a guide rod is fixed at the bottom of the outer wall of the top cover and between the first wedge-shaped oil control blocks, and an avoidance groove is provided at the top of the outer wall of the base and at the position corresponding to the guide rod. The outer wall of the guide rod is slidably connected to the inner wall of the avoidance groove, and a second reset spring for reset is sleeved on the outer wall of the guide rod and inside the avoidance groove.

[0014] Preferably, the oil control mechanism is a second wedge-shaped oil control block, and multiple second wedge-shaped oil control blocks are disposed below the bottom of the outer wall of the upper cover. A threaded plate is fixed to the top of the outer wall of the second wedge-shaped oil control block. A threaded receiving groove is provided at the bottom of the outer wall of the upper cover and at the position corresponding to the threaded plate. The outer wall of the threaded plate is threadedly connected to the inner wall of the threaded receiving groove.

[0015] Preferably, a second oil control groove is provided at the top of the outer wall of the base and at the position corresponding to the second wedge-shaped oil control block, and the outer wall of the second wedge-shaped oil control block is rotatably connected to the inner wall of the second oil control groove.

[0016] Preferably, the bottom of the outer wall of the inner cylinder and the position corresponding to the second oil control groove are provided with a through hole, and the bottom of the outer wall of the outer cylinder and the position corresponding to the first wedge-shaped oil control block are threaded with an adjusting bolt. The upper end of the adjusting bolt passes through the bottom of the inner wall of the outer cylinder and the through hole and is fixed at the bottom of the outer wall of the second wedge-shaped oil control block.

[0017] The beneficial effects of this utility model are:

[0018] In this invention, the base and top cover restrict the flow path of hydraulic oil, while the oil control groove controls the entry and exit of hydraulic oil into the inner cylinder. The flow rate of hydraulic oil through the oil control groove can be adjusted by moving the wedge-shaped oil control block up and down on the inner wall of the oil control groove. The multiple oil control grooves and wedge-shaped oil control blocks not only improve the adjustment range of the damping force value of the hydraulic damper, but also allow personnel to make more precise adjustments based on the damping force value, thus making it more convenient for personnel to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention viewed from the front.

[0020] Figure 2 This is a cross-sectional view of the present invention from the front view.

[0021] Figure 3 This is a cross-sectional view of the oil control component in Embodiment 1 of this utility model.

[0022] Figure 4 This is a cross-sectional view of the oil control component in Embodiment 2 of this utility model from the front view.

[0023] Figure 5 This is a three-dimensional structural diagram of the upper cover in Embodiment 2 of this utility model, viewed from above.

[0024] In the diagram: 100, outer cylinder; 110, slide rod; 120, upper connecting seat; 130, lower connecting seat; 200, first return spring; 210, inner cylinder; 220, upper piston; 300, base; 310, upper cover; 320, adjusting bolt; 330, first wedge-shaped oil control block; 340, guide rod; 341, second return spring; 350, second wedge-shaped oil control block; 351, threaded plate; 352, threaded receiving groove. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] Example 1:

[0027] See attached document Figures 1-3This utility model provides a hydraulic damper with adjustable damping force, including an outer cylinder 100. An inner cylinder 210 is located at the bottom of the outer cylinder 100. The bottom of the outer wall of the inner cylinder 210 is fixed to the inner wall of the outer cylinder 100 via a pad. The pad is used to elevate the inner cylinder 210 to prevent it from affecting the flow of hydraulic oil. A slide rod 110 is slidably connected to the inner wall of the inner cylinder 210. An upper connecting seat 120 is located above the top of the outer wall of the slide rod 110. A lower connecting seat 130 for installation is connected to the bottom of the outer wall of the outer cylinder 100. The upper connecting seat 120 is... The lower connecting seat 130 is for the convenience of personnel to install the entire hydraulic damper into a suitable position. The outer wall of the slide rod 110 and the top of the outer wall of the upper connecting seat 120 and the outer cylinder 100 are both fitted with a first return spring 200. The first return spring 200 is used to reset the slide rod 110 after it is compressed. The bottom end of the slide rod 110 passes through the top of the inner wall of the inner cylinder 210 and is fixed with an upper piston 220. The inner wall of the inner cylinder 210 and the lower piston are both provided with a lower piston. Both the upper piston 220 and the lower piston are provided with through holes for hydraulic oil to flow.

[0028] The bottom of the inner wall of the inner cylinder 210 is provided with an oil control component for controlling the hydraulic oil flow. The oil control component includes a base 300, which is installed on the top of the inner wall of the inner cylinder 210. A top cover 310 is provided on the top of the outer wall of the base 300. An oil control mechanism is provided between the base 300 and the top cover 310. The base 300 and the top cover 310 are used to control the flow rate of the hydraulic oil. The oil control mechanism is a first wedge-shaped oil control block 330. Multiple first wedge-shaped oil control blocks 330 are integrally fixed at appropriate positions on the bottom of the outer wall of the top cover 310. A first wedge-shaped oil control block 330 is provided at the top of the outer wall of the base 300, corresponding to the first wedge-shaped oil control block 330. An oil control groove is provided, with the outer wall of the first wedge-shaped oil control block 330 slidingly connected to the inner wall of the first oil control groove. The first wedge-shaped oil control block 330 is shaped to be wider at the top and narrower at the bottom. The shape of the first oil control groove is adapted to the shape of the first wedge-shaped oil control block 330. By controlling the height of the first wedge-shaped oil control block 330 moving up and down in the first oil control groove, the opening size of the first oil control groove can be controlled, thereby controlling the flow rate of hydraulic oil and adjusting the damping force of the damper. The bottom of the outer wall of the inner cylinder 210 and the corresponding position of the first oil control groove are provided with through holes. The bottom of the outer wall of the outer cylinder 100 and the corresponding position of the first oil control groove are provided with through holes. Each of the first wedge-shaped oil control blocks 330 is threaded with an adjusting bolt 320 at a corresponding position. The upper end of each adjusting bolt 320 passes through the bottom of the inner wall of the outer cylinder 100 and the connecting hole, abutting against the bottom of the outer wall of the first wedge-shaped oil control block 330. The adjusting bolt 320 is provided to facilitate personnel to lift the first wedge-shaped oil control block 330, thereby adjusting the distance between the first wedge-shaped oil control block 330 and the first oil control groove. A sealing ring is provided at the bottom of the outer wall of the outer cylinder 100 at the position corresponding to the adjusting bolt 320 to prevent hydraulic oil from being discharged through the connection position between the adjusting bolt 320 and the slide rod 110. The bottom of the outer wall of the upper cover 310 and Guide rods 340 are fixed between the first wedge-shaped oil control blocks 330. A clearance groove is provided at the top of the outer wall of the base 300 and at a position corresponding to the guide rod 340. The outer wall of the guide rod 340 is slidably connected to the inner wall of the clearance groove. A second reset spring 341 is fitted on the outer wall of the guide rod 340 and inside the clearance groove. The guide rod 340 can be prevented from separating from the clearance groove by the second reset spring 341, thus allowing the upper cover 310 to be connected to the base 300. A metal sealing ring is also provided at the edge of the outer wall of the clearance groove to prevent hydraulic oil from entering the clearance groove through the guide rod 340.

[0029] The usage process of this utility model is as follows: Those skilled in the art can first assemble the device according to the above description, and then install the assembled hydraulic damper in a suitable position through the upper connecting seat 120 and the lower connecting seat 130.

[0030] When the vibration equipment transmits force to the hydraulic damper, the slide bar 110 is compressed and contracts towards the inside of the inner cylinder 210, allowing the upper piston 220 to move downward. The hydraulic oil flows upward through the through hole on the upper piston 220, while the hydraulic oil at the bottom is discharged into the outside of the inner cylinder 210 through the first oil control groove. The hydraulic oil can buffer the moving upper piston 220, thereby buffering and weakening the transmitted force, thus achieving the purpose of damping and vibration reduction.

[0031] When personnel need to adjust the damping force of the hydraulic damper, they can use a tool to rotate the adjusting bolt 320, which will push the first wedge-shaped oil control block 330 upward, thereby adjusting the position of the first wedge-shaped oil control block 330 and the first oil control groove, and thus adjusting the opening size of the first oil control groove, thereby adjusting the rate at which the hydraulic oil passes through the first oil control groove. Multiple first oil control grooves can be set, making it easier for personnel to adjust the damping force of the hydraulic damper.

[0032] Example 2:

[0033] See attached document Figures 4-5 Compared to Embodiment 1, the difference in this embodiment lies in that the oil control mechanism is a second wedge-shaped oil control block 350. Multiple second wedge-shaped oil control blocks 350 are disposed below the bottom of the outer wall of the upper cover 310. A threaded plate 351 is fixed to the top of the outer wall of the second wedge-shaped oil control block 350. A threaded receiving groove 352 is provided at the bottom of the outer wall of the upper cover 310 corresponding to the threaded plate 351. The outer wall of the threaded plate 351 is threadedly connected to the inner wall of the threaded receiving groove 352. The bottom of the upper cover 310 is fixedly connected to the top of the outer wall of the base 300 via a fixing block. A second oil control groove is provided at the top of the outer wall of the base 300 corresponding to the second wedge-shaped oil control block 350. The outer wall of the second wedge-shaped oil control block 350 is rotatably connected to the inner wall of the second oil control groove. The outer... A through hole is provided at the bottom of the outer wall of the outer cylinder 100 and at the position corresponding to the second oil control groove. An adjusting bolt 320 is threadedly connected at the bottom of the outer wall of the outer cylinder 100 and at the position corresponding to the first wedge-shaped oil control block 330. The upper end of the adjusting bolt 320 passes through the bottom of the inner wall of the outer cylinder 100 and the through hole and is fixed at the bottom of the outer wall of the second wedge-shaped oil control block 350. The second wedge-shaped oil control block 350 can be rotated in the threaded receiving groove 352 by rotating the adjusting bolt 320. The threaded plate 351 and the threaded receiving groove 352 can move up and down in the second oil control groove, thereby adjusting the opening size of the second oil control groove, thereby adjusting the flow rate of hydraulic oil, and achieving the purpose of adjusting the damping force value of the hydraulic damper.

[0034] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A hydraulic damper with adjustable damping force value, characterized in that: Includes an outer cylinder (100), an inner cylinder (210) is provided at the bottom of the inner cylinder (100), the bottom of the outer wall of the inner cylinder (210) is fixed to the inner wall of the outer cylinder (100) by a pad, a slide rod (110) is slidably connected to the inner wall of the inner cylinder (210), and an oil control component for controlling the amount of hydraulic oil is provided at the bottom of the inner wall of the inner cylinder (210); The oil control component includes a base (300), which is installed on the top of the inner wall of the inner cylinder (210). A top cover (310) is provided on the top of the outer wall of the base (300), and an oil control mechanism is provided between the base (300) and the top cover (310).

2. The hydraulic damper with adjustable damping force value according to claim 1, characterized in that: An upper connecting seat (120) is provided above the top of the outer wall of the slide rod (110), and a lower connecting seat (130) for installation is connected to the bottom of the outer wall of the outer cylinder (100).

3. The hydraulic damper with adjustable damping force value according to claim 2, characterized in that: A first return spring (200) is sleeved on the outer wall of the slide rod (110) and between the top of the upper connecting seat (120) and the outer wall of the outer cylinder (100). The bottom end of the slide rod (110) passes through the top of the inner wall of the inner cylinder (210) and is fixed with an upper piston (220). A lower piston is provided on the inner wall of the inner cylinder (210) below the upper piston (220).

4. The hydraulic damper with adjustable damping force value according to claim 1, characterized in that: The oil control mechanism is a first wedge-shaped oil control block (330). Multiple first wedge-shaped oil control blocks (330) are integrally fixed at a suitable position on the bottom of the outer wall of the upper cover (310). The top of the outer wall of the base (300) and the position corresponding to the first wedge-shaped oil control block (330) are all provided with a first oil control groove.

5. The hydraulic damper with adjustable damping force value according to claim 4, characterized in that: The outer wall of the first wedge-shaped oil control block (330) is slidably connected to the inner wall of the first oil control groove. The bottom of the outer wall of the inner cylinder (210) and the position corresponding to the first oil control groove are all provided with through holes. The bottom of the outer wall of the outer cylinder (100) and the position corresponding to the first wedge-shaped oil control block (330) are all threadedly connected with adjusting bolts (320). The upper ends of the adjusting bolts (320) all pass through the bottom of the inner wall of the outer cylinder (100) and the through holes and abut against the bottom of the outer wall of the first wedge-shaped oil control block (330).

6. The hydraulic damper with adjustable damping force value according to claim 5, characterized in that: Guide rods (340) are fixed at the bottom of the outer wall of the upper cover (310) and between the first wedge-shaped oil control blocks (330). A clearance groove is provided at the top of the outer wall of the base (300) and at the position corresponding to the guide rod (340). The outer wall of the guide rod (340) is slidably connected to the inner wall of the clearance groove. A second reset spring (341) for reset is sleeved on the outer wall of the guide rod (340) and inside the clearance groove.

7. The hydraulic damper with adjustable damping force value according to claim 1, characterized in that: The oil control mechanism is a second wedge-shaped oil control block (350). Multiple second wedge-shaped oil control blocks (350) are all located below the bottom of the outer wall of the upper cover (310). A threaded plate (351) is fixed to the top of the outer wall of the second wedge-shaped oil control block (350). A threaded receiving groove (352) is provided at the bottom of the outer wall of the upper cover (310) and at the position corresponding to the threaded plate (351). The outer wall of the threaded plate (351) is threadedly connected to the inner wall of the threaded receiving groove (352).

8. The hydraulic damper with adjustable damping force value according to claim 7, characterized in that: The outer wall top of the base (300) and the position corresponding to the second wedge-shaped oil control block (350) are provided with a second oil control groove, and the outer wall of the second wedge-shaped oil control block (350) is rotatably connected to the inner wall of the second oil control groove.

9. A hydraulic damper with adjustable damping force value according to claim 8, characterized in that: The bottom of the outer wall of the inner cylinder (210) and the position corresponding to the second oil control groove are provided with a through hole. The bottom of the outer wall of the outer cylinder (100) and the position corresponding to the first wedge-shaped oil control block (330) are threaded with an adjusting bolt (320). The upper end of the adjusting bolt (320) passes through the bottom of the inner wall of the outer cylinder (100) and the through hole and is fixed at the bottom of the outer wall of the second wedge-shaped oil control block (350).

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