A damping adjustable rotary hydraulic damper

Abstract

A damping adjustable rotary hydraulic damper belongs to the technical field of dampers. The utility model comprises a cylinder body, a rotating shaft, and an adjusting valve stem. A partition is provided on the inner wall of the cylinder body, the rotating shaft is rotatably connected to the cylinder body, a blade is provided on the side of the rotating shaft, a valve hole is provided in the rotating shaft along its axial direction, the adjusting valve stem is provided in the valve hole, and oil holes are provided on both sides of the blade on the rotating shaft, and the oil holes are connected to the valve hole. The utility model has a large damping torque, and the damping torque is easy to adjust, which can meet more usage requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a damping-adjustable rotary hydraulic damper. Background Art

[0002] In the field of rotary damper technology, the main rotary damper is the metal sheet rotary damper. The main damping force is generated by the number of metal sheets superimposed and the size of the preload applied by the bolts, which generates a damping torque generated by the friction between the metal sheets. This damper has its advantages: simple structure and low cost. Its disadvantages are also very obvious: during long-term movement, the wear of the metal sheets due to friction continues to increase, and the preload of the bolts continues to decrease, resulting in a continuous decrease in the passive damping torque generated, and this reduction is uneven, which cannot meet the technical requirements of the subsequent product needs. In addition, the damping torque generated by this type of damper is generally small, and its application field is relatively narrow. It is mainly used in some furniture products, electronic products, etc. Utility Model Content

[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art and to provide a damping adjustable rotary hydraulic damper, which has a large damping torque, and the damping torque is easy to adjust, and can meet more usage requirements.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A damping adjustable rotary hydraulic damper comprises a cylinder body, a rotating shaft and an adjusting valve stem, wherein a partition is provided on the inner wall of the cylinder body, the rotating shaft is rotatably connected to the cylinder body, a blade is provided on the side of the rotating shaft, a valve hole is provided in the rotating shaft along its axial direction, the adjusting valve stem is arranged in the valve hole, and oil holes are provided on both sides of the blade on the rotating shaft, and the oil holes are connected to the valve hole.

[0006] As a preferred embodiment of the utility model, the partition plate and the blade each have three pieces that are evenly spaced apart, and each blade is located between two adjacent partition plates.

[0007] As a preferred embodiment of the present invention, the blades are arranged inclined.

[0008] As a preferred embodiment of the present invention, the blade is provided with a curved portion.

[0009] As a preferred embodiment of the present invention, the partition is arranged along the axial direction.

[0010] As a preferred embodiment of the present invention, the oil holes on both sides of the blade are located at different axial positions.

[0011] As a preferred embodiment of the utility model, the regulating valve stem includes a threaded connection portion and an oil hole matching portion, and the oil hole matching portion is provided with a positioning groove and an O-ring near the threaded connection portion.

[0012] As a preferred embodiment of the present invention, a limiting portion is provided at one end of the threaded connection portion away from the oil hole matching portion, and a limiting platform matching the limiting portion is provided in the rotating shaft.

[0013] As a preferred embodiment of the present invention, an adjusting groove is provided at one end of the adjusting valve stem close to the outside of the rotating shaft.

[0014] The advantages of the utility model are:

[0015] 1. It has a large damping torque, and the damping torque is easy to adjust, which can meet more usage requirements;

[0016] 2. The damping torque is generated by hydraulic pressure, which is not easy to wear and age and has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the explosion structure of a damping adjustable rotary hydraulic damper provided in this embodiment;

[0018] Figure 2 A cross-sectional view of a damping-adjustable rotary hydraulic damper provided in this embodiment;

[0019] Figure 3 A schematic diagram of the matching structure of a rotating shaft and a cylinder body in a damping adjustable rotary hydraulic damper provided in this embodiment;

[0020] Figure 4 A schematic diagram of the rotating shaft structure provided in this embodiment;

[0021] Figure 5 A schematic diagram of the regulating valve stem structure provided in this embodiment;

[0022] In the figure: 1-cylinder body; 11-partition; 2-rotating shaft; 21-blade; 22-oil hole; 3-adjusting valve stem; 31-threaded connection part; 32-oil hole matching part; 321-O-ring; 33-limiting part; 34-adjusting groove; 41-chamber end cover; 42-cylinder body end cover; 5-bolt; 6-washer; 7-deep groove ball bearing; 8-ordinary rotary oil seal; 9-high pressure rotary oil seal; 10-sealing ring. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figure 1-2As shown, this embodiment provides a damping adjustable rotary hydraulic damper, including a cylinder body 1, a rotating shaft 2, and an adjusting valve stem 3. A partition 11 is provided on the inner wall of the cylinder body 1, and the rotating shaft 2 is rotatably connected to the cylinder body 1. A blade 21 is provided on the side of the rotating shaft 2. A valve hole with one end open and the other end closed is provided in the rotating shaft 2 along its axial direction. The adjusting valve stem 3 is arranged in the valve hole. Oil holes 22 are provided on both sides of the blade 21 on the rotating shaft 2, and the oil holes 22 are connected to the valve hole. Working principle: Take the partition 11 and the blade 21 as an example. When the shaft 2 rotates, the blade 21 approaches the first side of the partition 11. The chamber between the blade 21 and the first side of the partition 11 is compressed and becomes a high-pressure chamber. Correspondingly, the chamber between the blade 21 and the second side of the partition 11 is a low-pressure chamber. The oil in the high-pressure chamber needs to flow through the oil hole on the first side of the blade, the gap between the valve hole and the regulating valve stem, and the oil hole on the second side of the blade in sequence, and then enter the low-pressure chamber. Damping will be generated in the process of the oil flowing through the above three places. Therefore, the damping torque output by this damper is greater. At the same time, the coverage area of ​​the regulating valve stem 3 on the oil hole 22 can be changed by adjusting the extension and contraction of the valve stem 3, thereby realizing the adjustment of the damping torque.

[0025] Of course, the entire damper also includes a chamber end cover 41 and a cylinder end cover 42 arranged at both ends of the cylinder body, a bolt 5 for connecting the cylinder end cover 4 and the cylinder body 1, a gasket 6 arranged between the cylinder end cover 3 and the cylinder body 1, a deep groove ball bearing 7 arranged between the rotating shaft 2 and the cylinder body 1 (or the cylinder end cover 4), an ordinary rotary oil seal 8, a high-pressure rotary oil seal 9 and a sealing ring 10. The above are all conventional settings and will not be elaborated here.

[0026] Specifically, the above example shows a case where there is only one partition plate 11 and blade 21. Of course, two can also be provided to form four chambers. However, in consideration of structural strength and force stability, this embodiment specifically adopts a solution where there are three partition plates 11 and blades 21 that are evenly spaced. Each blade 21 is located between two adjacent partition plates 11 to form six chambers. Figure 3 As shown, when the shaft 2 rotates counterclockwise, the three A chambers are high-pressure chambers, and the three B chambers are low-pressure chambers, and the flow direction of the oil is the direction indicated by the arrow in the figure. Of course, more partitions and blades can be provided as needed.

[0027] like Figure 4 As shown, the blade 21 on the side of the rotating shaft 2 is tilted, which can increase the force-bearing area of ​​the blade 21 and improve the structural stability; on the other hand, when one end of the blade 21 contacts the partition 11, there is a certain space between the two to avoid excessive oil pressure. In order to further enhance the above effect, the blade 21 has a certain degree of bending. The partition 11 is arranged along the axial direction, which can match the blade 21 on the one hand and facilitate processing on the other.

[0028] In order to improve the adjustment range of the damping torque, the oil holes 22 on both sides of the blade 21 are at different axial positions, and the oil holes on both sides of the blade are respectively the oil inlet holes and the oil outlet holes when the damper is working. In this way, when the regulating valve stem 3 moves to one end, the blocking area of ​​one of the oil holes will be adjusted first. After adjusting to the maximum or minimum, the blocking area of ​​the other oil hole will be adjusted. The damping torque changes continuously in this process, and the adjustment range is larger.

[0029] like Figure 5 As shown, the regulating valve stem 3 includes a threaded connection portion 31 and an oil hole matching portion 32. The threaded connection portion 31 is used to match the thread on the inner wall of the rotating shaft 2 to achieve telescopic adjustment, and the oil hole matching portion 32 is used to match the oil hole. In order to ensure sealing, the oil hole matching portion 32 is provided with a positioning groove and an O-ring 321 near the threaded connection portion 31 to prevent oil from flowing out. In addition, a limiting portion 33 is provided at one end of the threaded connection portion 31 away from the oil hole matching portion 32. A limiting platform matching the limiting portion 33 is provided in the rotating shaft 2 to limit the screwing range of the regulating valve stem 3 into the rotating shaft to prevent the O-ring 321 from crossing the oil hole and causing oil leakage.

[0030] In order to facilitate the rotation of the regulating valve stem 3, an adjusting groove 34 is provided at one end of the regulating valve stem 3 close to the outside of the rotating shaft 2, so as to facilitate operation with tools such as a screwdriver.

[0031] Finally, this damper can be adapted to the following scenarios: Currently, in the field of commercial vehicle suspension seat dampers, linear motion passive dampers are mainly used, which are installed inside the suspension seat, greatly reducing the travel of the seat suspension, which is not conducive to seat comfort. When the traditional damper is replaced with a cost damper, the installation method has changed dramatically. The original position space inside the seat suspension has now been cleared, and the damper is installed on the side of the scissor frame, which completes the increase in the seat suspension travel, which is conducive to increasing the comfort of the seat during work. In addition, in the field of rotary tracking photovoltaic brackets, the traditional rotary tracking photovoltaic bracket has poor ability to resist strong winds, and the stiffness of the overall structure is relatively low. When instantaneous strong winds occur, the photovoltaic panel is subjected to instantaneous huge instantaneous wind loads. Under the action of wind loads, it is easy to cause the panel to swing violently, exceeding the limit of its overall stiffness, causing overall failure. The structural method of carrying this damper on the main rotating shaft can effectively increase its instantaneous stiffness and enhance its ability to resist strong winds.

[0032] The above is only a preferred specific implementation of the utility model, which is a realization method based on the overall concept of the utility model, and the protection scope of the utility model is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A damping adjustable rotary hydraulic damper, characterized in that: It includes a cylinder body, a rotating shaft, and an adjusting valve stem. A partition is provided on the inner wall of the cylinder body. The rotating shaft is rotatably connected to the cylinder body. Blades are provided on the side of the rotating shaft. A valve hole is provided in the rotating shaft along its axial direction. The adjusting valve stem is arranged in the valve hole. Oil holes are provided on both sides of the blades on the rotating shaft, and the oil holes are connected to the valve hole.

2. The damping adjustable rotary hydraulic damper according to claim 1, characterized in that: The partition plate and the blade each have three pieces with even intervals, and each blade is located between two adjacent partition plates.

3. The damping adjustable rotary hydraulic damper according to claim 1, characterized in that: The blades are arranged tilted.

4. A damping adjustable rotary hydraulic damper according to claim 1 or 3, characterized in that: The blade is provided with a curved portion.

5. The damping adjustable rotary hydraulic damper according to claim 1, characterized in that: The partition is arranged along the axial direction.

6. The damping adjustable rotary hydraulic damper according to claim 1, characterized in that: The oil holes on both sides of the blade are located at different axial positions.

7. The damping adjustable rotary hydraulic damper according to claim 1, characterized in that: The regulating valve stem comprises a threaded connection portion and an oil hole matching portion, and the oil hole matching portion is provided with a positioning groove and an O-ring near the threaded connection portion.

8. The damping adjustable rotary hydraulic damper according to claim 7, characterized in that: A limiting portion is provided at one end of the threaded connection portion away from the oil hole matching portion, and a limiting platform matching the limiting portion is provided in the rotating shaft.

9. The damping adjustable rotary hydraulic damper according to claim 1, characterized in that: An adjusting groove is arranged at one end of the adjusting valve rod close to the outside of the rotating shaft.

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