Internal flow structure of a shock absorber

Abstract

The utility model relates to shock absorber technical field especially is involved in a shock absorber inside drainage structure, including working cylinder and setting the oil unloading sleeve of working cylinder's outside, oil unloading sleeve and working cylinder outer wall surface between having oil guide cavity, be equipped with oil unloading hole on working cylinder, be equipped with inner oil hole on oil unloading sleeve, oil unloading hole and inner oil hole all link to each other with oil guide cavity. The utility model installs on shock absorber back, can increase a flow path in shock absorber inside, cooperate the control of the external electromagnetic valve of oil guide pipe mouth additional installation simultaneously, can reach the purpose that adjustable damping. Remove oil guide pipe, use working cylinder oil unloading sleeve to replace, simple structure, only increase working cylinder oil unloading sleeve and seal O type ring, convenient installation, and the part processing cost and processing difficulty are lower, are suitable for large -scale batch production.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber technology, and in particular to an internal drainage structure for a shock absorber. Background Technology

[0002] During vehicle operation, shock absorbers are typically installed in the suspension system to rapidly dampen vibrations between the chassis and body, thereby improving ride smoothness and comfort. In daily driving, appropriate shock absorbers should be used depending on road conditions to significantly improve ride comfort and extend the lifespan of the shock absorbers. Telescopic shock absorbers are popular due to their simple structure, ease of manufacturing, and high cost-effectiveness. Typically, telescopic shock absorbers use a combination of a return valve system and a compression valve system. When the piston valve moves to the left, oil in the left working cylinder passes through the return valve system, causing the valve plate to deform and generate damping force. When the piston valve moves to the right, oil in the right working cylinder passes through the compression valve system, causing the valve plate to deform and generate damping force. However, this structure has limitations; the valve system's damping force is singular and difficult to adapt to different road conditions, thus significantly affecting ride comfort.

[0003] like Figure 1 As shown, this structure requires drilling a beveled hole in the piston rod guide, which connects to an axial oil guide tube to drain the oil. This structure is complex and presents many machining challenges. The actual machining of inclined holes is difficult, has a low yield, and is difficult to control in terms of cost, making it unsuitable for mass production.

[0004] When installing the oil guide pipe, it is difficult to manually align it with the lower adjustment base, and a thin iron wire is needed for assistance. The oil guide pipe and the upper guide hole also need to be aligned during installation. After installation, the guide hole needs to be plugged with a silicone plug. The operation is quite difficult and not suitable for mass production.

[0005] The internal layout is inflexible, with the oil guide pipe occupying part of the internal space, which limits the selection of internal piston valves. Only a larger valve system structure can be selected to meet the requirements of the oil guide pipe layout, making it unsuitable for chassis suspension structures with limited space. Utility Model Content

[0006] To address the aforementioned problems, the purpose of this utility model is to provide a shock absorber with a side-mounted external recovery damping adjustment structure, which achieves adjustable damping. Moreover, it has a simple structure, is easy to install, and has lower parts processing costs and processing difficulty, making it suitable for large-scale mass production.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a shock absorber with a side-mounted external recovery damping adjustment structure, comprising an oil reservoir, a working cylinder in which a piston rod is installed, an oil unloading sleeve on the outside of the working cylinder, an oil guide cavity between the oil unloading sleeve and the working cylinder, an oil unloading hole on the working cylinder, an inner oil hole on the oil reservoir, both the oil unloading hole and the inner oil hole being connected to the oil guide cavity, and a solenoid valve connected to the outside of the inner oil hole.

[0008] In the above technical solution, O-rings are provided at the connection points between the oil unloading sleeve and the working cylinder at both ends, and the O-rings are used to seal the outer wall surface of the working cylinder.

[0009] In the above technical solution, the solenoid valve is installed at the oil guide pipe on the outer wall of the oil storage cylinder. The oil guide pipe passes through the outer wall of the oil storage cylinder and the working cylinder and communicates with the oil guide cavity.

[0010] In the above technical solution, the oil reservoir is provided with a piston valve assembly for restoration, which is installed at one end of the piston, and a compression valve assembly for compression is provided at the bottom of the oil reservoir.

[0011] In the above technical solution, a strong magnet is provided on the inner wall surface of the oil storage cylinder on one side of the oil guide pipe.

[0012] In the above technical solution, the piston rod is provided with a guide on its outer periphery and moves along the inner wall of the oil reservoir through the guide.

[0013] In the above technical solution, a limiting ring is provided on the outer periphery of the piston rod, and a buffer pad is installed on the limiting ring.

[0014] In summary, the advantages of this utility model compared to traditional techniques are as follows: When installed on a shock absorber, this utility model adds a flow path inside the shock absorber. Combined with an external solenoid valve installed at the oil guide pipe inlet for control, adjustable damping can be achieved. The oil guide pipe is eliminated and replaced with a working cylinder unloading sleeve, resulting in a simpler structure. It only adds the working cylinder unloading sleeve and sealing O-rings, making installation convenient. Furthermore, the cost and difficulty of parts processing are lower, making it suitable for large-scale mass production. Attached Figure Description

[0015] The foregoing and other objects, features and advantages of this invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of a shock absorber in the prior art of this utility model; Figure 2 This is a schematic diagram of the internal leakage structure of the shock absorber in the prior art of this utility model; Figure 3 This is a schematic diagram of the oil inlet state of this utility model; Figure 4 This is a schematic diagram of the oil discharge state of this utility model; Figure 5 This is a schematic diagram of the oil guide tube of this utility model; Figure 6 This is a schematic diagram of the usage state of this utility model; Figure 7 for Figure 6 A cross-sectional view; The following are the labels: 100, working cylinder; 110, oil unloading hole; 400, oil reservoir; 200, oil unloading sleeve; 210, oil guide chamber; 220, inner oil hole; 230, O-ring; 240, oil guide pipe; 300, piston; 310, piston rod; 400, oil reservoir; 500, solenoid valve. Detailed Implementation

[0017] Based on the preferred embodiments of this utility model, and through the following description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

[0018] The present invention will be further described with reference to the following figures: like Figures 3-7 As shown, an internal drainage structure for a shock absorber includes a working cylinder 100 and an oil discharge sleeve 200 disposed on the outside of the working cylinder 100. An oil guide cavity 210 is provided between the oil discharge sleeve 200 and the outer wall of the working cylinder 100. An oil discharge hole 110 is provided on the working cylinder 100 and an inner oil hole 220 is provided on the oil discharge sleeve 200. Both the oil discharge hole 110 and the inner oil hole 220 are connected to the oil guide cavity 210.

[0019] One end of the piston rod 310 of the piston 300 is installed in the working cylinder 100, which is located in the oil reservoir 400.

[0020] Both ends of the unloading sleeve 200 are fixedly connected to the outer wall of the working cylinder 100, and O-rings 230 are provided at the connection points of both ends with the working cylinder 100, and the O-rings 230 seal the outer wall of the working cylinder 100.

[0021] An oil guide pipe 240 is provided at the inner oil hole 220. The inner end of the oil guide pipe 240 is connected to the oil guide cavity 210, and the outer end passes through the oil storage cylinder 400 and the working cylinder 100 and extends to the outside of the oil storage cylinder 400.

[0022] The outer end of the oil guide pipe 240 is connected to a solenoid valve 500.

[0023] When this utility model is installed in a vehicle: like Figure 3 , 4 As shown, when the shock absorber is working, it continuously repeats the process from the piston rod 310 being stretched to its longest length to the piston rod 310 being compressed to its shortest length. During the stretching process of the piston rod 310, a portion of the oil in the working cylinder 100 enters the oil guide chamber 210 → inner oil hole 220 → flow regulating device through the oil discharge hole 110 on the working cylinder 100, thereby adjusting the compression / restoration force value. At this time, adjusting the corresponding position of the external solenoid valve 500 changes the flow area in the corresponding oil guide chamber 210, and the corresponding compression / restoration force value also changes accordingly, thus achieving damping adjustment.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An internal drainage structure for a shock absorber, characterized in that: It includes a working cylinder and an oil unloading sleeve disposed on the outside of the working cylinder. There is an oil guiding cavity between the oil unloading sleeve and the outer wall of the working cylinder. The working cylinder is provided with an oil unloading hole, and the oil unloading sleeve is provided with an inner oil hole. Both the oil unloading hole and the inner oil hole are connected to the oil guiding cavity.

2. The internal drainage structure of the shock absorber according to claim 1, characterized in that: The working cylinder is installed in the oil reservoir, and one end of the piston rod of the piston is installed inside the working cylinder.

3. The internal drainage structure of the shock absorber according to claim 1, characterized in that: Both ends of the unloading sleeve are fixedly connected to the outer wall of the working cylinder, and O-rings are provided at the connection points of both ends with the working cylinder, and the O-rings are used to seal the outer wall of the working cylinder.

4. The internal drainage structure of the shock absorber according to claim 1, characterized in that: An oil guide pipe is provided at the inner oil hole. The inner end of the oil guide pipe is connected to the oil guide cavity, and the outer end passes through the oil storage cylinder and the working cylinder and extends to the outside of the oil storage cylinder.

5. The internal drainage structure of the shock absorber according to claim 4, characterized in that: A solenoid valve is connected to the outer end of the oil guide pipe.

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