Guider structure of automobile shock absorber

Abstract

The utility model belongs to the technical field of shock absorber devices, and particularly relates to a guider structure of an automobile shock absorber, which comprises a guide seat, a guide bushing and an oil scraper ring, the through hole comprises a first hole channel used for containing a guide bush, a second hole channel used for containing an oil scraper ring and an isolation part connected with the first hole channel and the second hole channel, the inner diameter of the isolation part is smaller than the inner diameter of the first hole channel and the inner diameter of the second hole channel at the same time, and the oil scraper ring and the guide bush are separated. And the inner diameter of the oil scraping ring is smaller than that of the isolation part. The guide device is used for solving the technical problems that a guide bush and an oil scraper ring of an existing guide device structure are arranged adjacently, when a shock absorber works, a piston rod drives the guide bush to move, the oil scraper ring is extruded and deformed, and the service life of the oil scraper ring is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of shock absorber devices, specifically relating to a guide structure for an automotive shock absorber. Background Technology

[0002] Shock absorbers are devices designed to accelerate the attenuation of vibrations between the vehicle frame and body, thereby improving the ride comfort of a car. Most car suspension systems contain shock absorbers. The structure of a shock absorber consists of a piston rod with a piston inserted into an oil-filled cylinder. The piston has a throttling orifice and valves, allowing the oil in the two spaces separated by the piston to replenish each other. Damping is generated when the viscous oil passes through the throttling orifice. Because the piston moves in both directions, valves are installed on both sides of the piston, called the return valve and the flow valve, respectively.

[0003] The guide is a guiding device at the cylinder seal, ensuring the piston rod is guided during movement and bearing the lateral forces of the shock absorber. The guide usually also contains an oil scraper ring, whose main function is to scrape off excess oil from the piston rod and spread a uniform oil film on it. However, in currently used guides, the sliding bearing is placed adjacent to the oil scraper ring. The reciprocating motion of the piston rod and the lateral friction force drive the sliding bearing inside the guide to move, causing the sliding bearing to compress and deform the oil scraper ring. This affects the service life of the oil scraper ring, thus increasing the maintenance cost of the shock absorber. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a guide structure for an automotive shock absorber, which solves the technical problem that in current guide structures, the guide bushing and the oil scraper ring are arranged adjacent to each other, and the piston rod drives the guide bushing to move during shock absorber operation, causing compression deformation of the oil scraper ring and affecting its service life.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a guide structure for an automotive shock absorber, the guide structure including a guide seat, a guide bushing, and an oil scraper ring. The guide seat is provided with a through hole for a piston rod to pass through. The through hole includes a first channel for accommodating the guide bushing, a second channel for accommodating the oil scraper ring, and an isolation portion connecting the first channel and the second channel. The inner diameter of the isolation portion is smaller than the inner diameters of both the first channel and the second channel, thus separating the oil scraper ring from the guide bushing. The inner diameter of the oil scraper ring is smaller than the inner diameter of the isolation portion.

[0006] Preferably, a pressure ring is also provided in the second channel to limit the oil scraper ring within the second channel.

[0007] Preferably, the pressure ring has a cross-section in the shape of "「", which is interference-fitted with the second channel to press the oil scraper ring.

[0008] Preferably, the inner wall of the through hole is provided with an oil drain groove for communication between the space above and below the oil scraper ring after the piston rod and the guide are connected.

[0009] Preferably, the oil drain groove includes a first oil drain groove disposed on the side wall of the second channel and a second oil drain groove disposed on the top surface of the isolation part, wherein the second oil drain groove is aligned with and communicates with the first oil drain groove.

[0010] Preferably, the guide bushing is a sliding bearing.

[0011] The beneficial effects of adopting the technical solution of this utility model are as follows:

[0012] This invention features an isolation section between the guide bushing and the oil scraper ring. When the guide bushing moves axially under the drive of the piston rod, the isolation section prevents the oil scraper ring from being squeezed, thus avoiding deformation caused by the squeezing and extending the service life of the oil scraper ring. This, in turn, extends the maintenance interval of the shock absorber and reduces costs. Attached Figure Description

[0013] Figure 1 A schematic cross-sectional view of an embodiment of a guide structure for an automotive shock absorber;

[0014] Figure 2 A schematic diagram of a guide seat, representing an embodiment of a guide structure for an automotive shock absorber;

[0015] Figure 3 for Figure 2 A cross-sectional schematic diagram.

[0016] in, Figure 1-3 In the middle, 1-guide seat, 11-first channel, 12-second channel, 13-isolation part, 2-guide bushing, 3-oil scraper ring, 4-pressure ring, 5-oil drain groove, 51-first oil drain groove, 52-second oil drain groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments, and do not limit the scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The specific implementation method is as follows:

[0021] Example 1, as Figure 1-3 As shown, a guide structure for an automotive shock absorber includes a guide seat 1, a guide bushing 2, and an oil scraper ring 3. The guide seat 1 has a through hole running vertically through it for the piston rod of the shock absorber to pass through. The through hole includes a first channel 11 at the lower part, a second channel 12 at the upper part, and an isolation portion 13 connecting the first channel 11 and the second channel 12. The isolation portion 13 is integrally formed with the guide seat 1, is annular, and its inner diameter is smaller than the diameter of the first channel 11 and the second channel 12.

[0022] The guide bushing 2 is fitted into the first channel 11 of the guide seat 1, through which the piston rod passes. Under the reciprocating motion of the piston rod and the action of lateral friction, the guide bushing 2 will move to a certain extent along the axial direction. The oil scraper ring 3 is fitted into the second channel 12 and supported on the isolation part 13. The inner diameter of the oil scraper ring 3 is smaller than the inner diameter of the isolation part, so as to hold the piston rod tightly to scrape off the oil on it.

[0023] In this embodiment, the guide seat 1 is made of powder metallurgy material, the oil scraper ring 3 is made of PTFE material, and the guide bushing 2 is made of composite material. The guide bushing 2 and the oil scraper ring are isolated by a rigid isolation part 13, so that the oil scraper ring will not be squeezed when the guide bushing 2 moves axially.

[0024] In this embodiment, a guide structure for an automotive shock absorber is described. During use, as the vehicle body undulates, the piston rod extends and retracts relative to the hydraulic cylinder. During this extension and retraction, the oil scraper ring 3 scrapes off the oil on the piston rod, forming an oil film. The oil scraper ring 3 and the guide bushing 2 are isolated by a rigid isolation part 13. Even if the guide bushing 2 moves axially, it will not compress the oil scraper ring 3, thus avoiding compression deformation of the oil scraper ring 3 and extending its service life.

[0025] Furthermore, a pressure ring 4 is also provided in the second channel 12 to press and limit the oil scraper ring 3 in the second channel 12, so as to prevent the oil scraper ring 3 from moving with the piston rod.

[0026] Furthermore, the cross-section of the pressure ring 4 is "「" shaped, and it is installed in the second channel 12 with an interference fit, pressing the oil scraper ring 3 tightly to ensure the reliable positioning of the oil scraper ring 3.

[0027] Furthermore, an oil drain groove 5 is provided on the inner wall of the through hole, which connects the space above and below the oil scraper ring 3, and is used to drain excess oil above the guide seat 1 back into the oil storage cylinder and to discharge air from the working cylinder.

[0028] Furthermore, the oil drain groove 5 includes a first oil drain groove 51 and a second oil drain groove 52. The first oil drain groove 51 is disposed on the inner wall of the second channel 12, and the second oil drain groove 52 is disposed on the top surface of the isolation part 13. The second oil drain groove 52 is aligned with and communicates with the first oil drain groove 51 to realize the communication between the space above and below the oil scraper ring 3 after the piston rod is connected to the guide structure.

[0029] Furthermore, the guide bushing 2 adopts a sliding bearing to guide the piston rod and ensure the smoothness of the piston rod's extension and retraction.

[0030] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A guide structure for an automotive shock absorber, the guide structure comprising a guide seat, a guide bushing, and an oil scraper ring, characterized in that, The guide seat is provided with a through hole for the piston rod to pass through. The through hole includes a first channel for accommodating the guide bushing, a second channel for accommodating the oil scraper ring, and an isolation portion connecting the first channel and the second channel. The inner diameter of the isolation portion is smaller than the inner diameter of both the first channel and the second channel, thus separating the oil scraper ring and the guide bushing. The inner diameter of the oil scraper ring is smaller than the inner diameter of the isolation portion.

2. The guide structure of an automotive shock absorber according to claim 1, characterized in that, A pressure ring is also provided in the second channel to limit the oil scraper ring within the second channel.

3. The guide structure of an automotive shock absorber according to claim 2, characterized in that, The pressure ring has a cross-section in the shape of "「" and is interference-fitted with the second channel to press the oil scraper ring.

4. The guide structure of an automotive shock absorber according to claim 1, characterized in that, The inner wall of the through hole is provided with an oil drain groove, which is used to connect the space above and below the oil scraper ring after the piston rod and the guide are connected.

5. The guide structure of an automotive shock absorber according to claim 4, characterized in that, The oil drain groove includes a first oil drain groove disposed on the side wall of the second channel and a second oil drain groove disposed on the top surface of the isolation part. The second oil drain groove is aligned with and connected to the first oil drain groove.

6. The guide structure of an automotive shock absorber according to claim 1, characterized in that, The guide bushing uses a sliding bearing.

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