Shock absorber guide structure with oil scraper ring easy to replace

Abstract

The utility model provides a shock absorber guide structure with an oil scraper ring easy to replace, and belongs to the technical field of automobile accessories. The guide sealing cover is in threaded connection with the cavity opening of the oil scraping cavity of the guide seat body, disassembly and assembly of the guide sealing cover are achieved, meanwhile, the oil scraping ring is installed in the oil scraping cavity and located below the guide sealing cover, and a gap is formed between the oil scraping ring and the guide sealing cover, so that independent replacement of the oil scraping ring can be achieved when the oil scraping ring is disassembled and assembled to the guide sealing cover. In addition, a limiting step is arranged at the cavity bottom of the oil scraping cavity, an upper limiting assembly is arranged between the cavity opening of the oil scraping cavity and the guide sealing cover, the limiting step abuts against the lower end of the guide sealing cover, circumferential rotation of the guide sealing cover is limited through the upper limiting assembly, and therefore the oil scraping cavity is more stable in use. Therefore, the accuracy of the installation position of the guide sealing cover and the position during use is maintained, the installation and movement space of the oil scraper ring can be always kept stable, and the use performance is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a shock absorber guide structure with an easily replaceable oil scraper ring. Background Technology

[0002] Car shock absorbers are typically installed between the wheels and the chassis to filter out bumps and vibrations during driving, thereby reducing vibrations generated when the vehicle is in motion and improving ride comfort.

[0003] Currently, the main structure of existing automotive shock absorbers typically includes an outer cylinder, an inner cylinder, a piston, a piston rod, a bottom valve seat, and a guide structure. The outer and inner cylinders are coaxially arranged to form the shock absorber body. The bottom valve seat and the guide structure are respectively located at both ends of the shock absorber body. The piston is slidably disposed within the shock absorber body. One end of the piston rod is fixedly connected to the piston, and the other end of the piston rod extends out of the shock absorber body after passing through the guide structure. At this point, the guide structure is used to guide the piston rod during extension and retraction. Therefore, the relative movement between the guide structure and the piston rod makes the guide structure a vulnerable part. Existing guide structures, such as the guide for automotive shock absorbers disclosed in patent CN201513513U, include a guide body and a bushing. The bushing is installed in the mounting hole of the guide body. An oil scraper ring is provided between the bottom surface of the mounting hole and the bushing, which slides and engages with the piston rod of the shock absorber. This allows excess oil on the piston rod to be scraped off during the reciprocating motion of the piston rod, reducing the pressure on the outer oil seal of the shock absorber. Therefore, existing guide structures typically include a floating scraper ring fitted onto the piston rod, which is then confined within the guide body via a bushing. While this structure meets normal usage requirements, after prolonged use, the scraper ring becomes the most vulnerable component, moving not only relative to the guide body but also relative to the piston rod. Furthermore, because the bushing needs to restrict excessive scraper ring movement, it is usually press-fitted into the guide body's mounting hole, making it difficult to replace the scraper ring individually after damage; the entire guide structure must be replaced, resulting in high operating costs. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this paper aims to provide a shock absorber guide structure with an easily replaceable oil scraper ring. An oil scraper chamber is provided at the end of the guide seat body away from the piston. A guide cover is installed on the oil scraper chamber, and an oil scraper ring is disposed within the oil scraper chamber with a gap between the ring and the guide cover. The guide cover is threadedly connected to the guide seat body. A lower limit step is provided within the oil scraper chamber, and the bottom of the guide cover abuts against the lower limit step. An upper limit component is provided between the top of the guide cover and the guide seat body. This allows for the detachable connection of the guide cover relative to the guide seat body, facilitating the opening of the oil scraper chamber and replacement of the oil scraper ring without requiring a complete replacement of the guide structure, thus reducing operating costs. Furthermore, the lower limit step and upper limit component ensure accurate installation of the guide cover, preventing issues such as the oil scraper ring failing to float due to excessive tightness or excessive floating stroke due to excessive looseness. Additionally, it prevents accidental rotation of the guide cover during use.

[0005] The specific technical solution is as follows:

[0006] A shock absorber guide structure with an easily replaceable oil scraper ring includes a guide seat body and an oil scraper ring. It further includes a guide cap, one end of the guide seat body connected to a shock absorber cylinder, and the other end of the guide seat body having a concave annular oil scraper cavity. A central hole, penetrating and communicating with the shock absorber cylinder, is located in the center of the oil scraper cavity. A piston rod passes through the central hole. The opening of the oil scraper cavity is fitted with a guide cap, and the two are threaded together. The oil scraper ring is positioned within the oil scraper cavity and spaced apart from the guide cap. A protruding limiting step is provided on the bottom of the oil scraper cavity, abutting against the bottom of the guide cap. An upper limit assembly is provided between the top of the guide cap and the opening of the oil scraper cavity of the guide seat body.

[0007] In the above-mentioned shock absorber guide structure with an easily replaceable oil scraper ring, the limiting step is a ring body, the limiting step is coaxially arranged with the oil scraper cavity, and the bottom and outer side of the limiting step abut against the bottom and inner sidewall of the oil scraper cavity, respectively.

[0008] In the aforementioned shock absorber guide structure with an easily replaceable oil scraper ring, the limiting step and the guide seat body are an integral structure.

[0009] The aforementioned shock absorber guide structure with an easily replaceable oil scraper ring includes an internal thread on the inner sidewall of the oil scraper chamber along the axial direction of the central hole, and a guide cap arranged in a cap shape with an external thread on the outer sidewall of the cap edge that mates with the internal thread.

[0010] The aforementioned shock absorber guide structure with an easily replaceable oil scraper ring includes a guide cover with several tool holes arranged in a circular array around the axis of the central hole.

[0011] In the aforementioned shock absorber guide structure with an easily replaceable oil scraper ring, the upper limit assembly includes a limiting plate, one end of which is mounted on the guide seat body, and the other end of which is mounted on the guide cover.

[0012] In the aforementioned shock absorber guide structure with an easily replaceable oil scraper ring, a first limiting groove is provided on the top surface of the guide cover, and a second limiting groove is provided at the opening of the oil scraper cavity of the guide seat body to cooperate with the first limiting groove. The two ends of the limiting piece are respectively inserted into the first limiting groove and the second limiting groove.

[0013] In the above-mentioned shock absorber guide structure with an easily replaceable oil scraper ring, a locking hole is provided at the bottom of the second limiting groove, and a connecting hole corresponding to the locking hole is provided on one end of the limiting piece that is stuck in the second limiting groove. A screw passes through the connecting hole and connects to the locking hole.

[0014] In the above-mentioned shock absorber guide structure with an easily replaceable oil scraper ring, a limiting protrusion is provided at the opening of the first limiting groove and / or the second limiting groove. After the limiting piece is inserted into the first limiting groove and the second limiting groove, the limiting piece is pressed by the limiting protrusion.

[0015] In the aforementioned shock absorber guide structure with an easily replaceable oil scraper ring, the second limiting groove is arranged in an "L" shape. The second limiting groove includes a horizontal section and a vertical section, which are arranged radially and axially along the guide seat body, respectively, and are both located on the outer side wall of the guide seat body.

[0016] The positive effects of the above technical solution are:

[0017] The aforementioned shock absorber guide structure with an easily replaceable oil scraper ring features a guide cap threadedly connected to the opening of the oil scraper chamber of the guide seat body. An oil scraper ring is installed inside the oil scraper chamber. A protruding limiting step is provided on the bottom of the oil scraper chamber, abutting against the bottom of the guide cap. An upper limit component is located between the top of the guide cap and the opening of the oil scraper chamber of the guide seat body. The guide cap restricts the movement of the oil scraper ring. Since the guide cap is threaded onto the guide seat body, it is easy to disassemble and replace the oil scraper ring individually, reducing operating costs. Furthermore, the limiting step and upper limit component limit the vertical movement of the guide cap, ensuring the accuracy of its position after installation and preventing accidental rotation during use that could alter its installation position. This ensures that the floating stroke of the oil scraper ring remains constant, resulting in better structural stability. Attached Figure Description

[0018] Figure 1 This is a structural diagram of an embodiment of a shock absorber guide structure for an easily replaceable oil scraper ring according to the present invention;

[0019] Figure 2This is a cross-sectional view of a shock absorber guide structure for an easily replaceable oil scraper ring according to this utility model.

[0020] Figure 3 This is a schematic diagram of the installation of a limiting piece with connecting holes according to a preferred embodiment of the present invention;

[0021] Figure 4 This is a structural diagram of the first limiting groove with limiting protrusions according to a preferred embodiment of the present invention.

[0022] In the attached diagram: 1. Guide seat body; 11. Oil scraping chamber; 12. Center hole; 13. Second limiting groove; 131. Locking hole; 132. Limiting protrusion; 2. Oil scraping ring; 3. Guide cover; 31. Tool hole; 32. First limiting groove; 4. Limiting step; 5. Upper limit assembly; 51. Limiting piece; 511. Connecting hole. Detailed Implementation

[0023] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 4 The technical solution provided by this utility model is described in detail, but the following content is not intended to limit this utility model.

[0024] Figure 1 This is a structural diagram of an embodiment of a shock absorber guide structure for an easily replaceable oil scraper ring according to the present invention; Figure 2 This is a cross-sectional view of a shock absorber guide structure for an easily replaceable oil scraper ring according to this utility model. Figure 1 and Figure 2 As shown, the shock absorber guide structure with easily replaceable oil scraper ring provided in this embodiment includes: guide seat body 1, oil scraper ring 2 and guide cover 3. In addition, a limit step 4 and an upper limit component 5 are provided between the guide seat body 1 and the guide cover 3.

[0025] Specifically, one end of the guide seat body 1 is connected to the shock absorber cylinder, thus enabling the guide seat body 1 to be installed on the shock absorber cylinder. At this time, a concave annular oil scraping chamber 11 is provided at the other end of the guide seat body 1, providing space for the installation of the oil scraping ring 2 and the guide cover 3. Furthermore, a central hole 12 is provided in the center of the oil scraping chamber 11, penetrating into the shock absorber cylinder. During installation, the piston rod of the shock absorber is inserted into the central hole 12, with one end extending out of the guide seat body 1. Simultaneously, a guide cover 3 is provided at the opening of the oil scraping chamber 11. The guide cover 3 has a clearance hole in its center, directly opposite the central hole 12, through which the piston rod passes. The guide cover 3 is connected to the guide seat body 1 by a threaded connection, facilitating the installation and removal of the guide cover 3 on the guide seat body 1. This allows for the individual replacement of the oil scraping ring 2 after wear by removing the guide cover 3, eliminating the need to replace the entire guide structure and reducing operating costs. Furthermore, the oil scraper ring 2 is positioned within the oil scraper cavity 11 with a gap between it and the guide cap 3. This allows the oil scraper ring 2 to float within the oil scraper cavity 11 to meet oil scraping requirements, while also limiting its stroke to prevent excessive movement. Additionally, a protruding limiting step 4 is provided at the bottom of the oil scraper cavity 11, abutting against the bottom of the guide cap 3. In the axial direction of the oil scraper ring 2, the limiting step 4 restricts the guide cap 3 from moving further towards the bottom of the oil scraper cavity 11, thus ensuring sufficient movement space for the oil scraper ring 2. Furthermore, an upper limit component 5 is provided between the top of the guide cap 3 and the opening of the oil scraper cavity 11 of the guide seat body 1. In the axial direction of the oil scraper ring 2, the upper limit component 5 restricts the guide cap 3 from reversing and detaching from the opening of the oil scraper cavity 11, thereby maintaining the accurate installation and stability of the guide cap 3 on the guide seat body 1 and ensuring stability during use. This results in a more rational structural design. It is worth noting that when the guide cover 3 is installed, due to the limit adjustment, the operator only needs to directly screw the guide cover 3 until it can no longer be screwed, which can ensure the accurate installation position of the guide cover 3 and make the operation more convenient.

[0026] More specifically, the limiting step 4, located within the oil scraping chamber 11, is an annular structure. In this configuration, the limiting step 4 is coaxially fitted around the outside of the oil scraping ring 2, with a gap between them, thus not affecting the installation or movement of the oil scraping ring 2. Furthermore, the limiting step 4 is also coaxially arranged with the oil scraping chamber 11, and its bottom and outer side abut against the bottom and inner sidewall of the oil scraping chamber 11, respectively, ensuring the limiting step 4 remains stably within the oil scraping chamber 11, resulting in a better limiting effect.

[0027] More specifically, the limiting step 4 set in the oil scraping cavity 11 and the guide seat body 1 are an integral structure. That is, when processing the oil scraping cavity 11, the limiting step 4 can be directly processed, which facilitates processing and manufacturing, and at the same time can further improve the structural stability of the limiting step 4 in the oil scraping cavity 11, making the structural design more reasonable.

[0028] More specifically, an internal thread is provided on the inner sidewall of the oil scraper chamber 11 along the axial direction of the central hole 12, facilitating subsequent threaded connection with the guide cover 3. Simultaneously, the guide cover 3 is arranged in a cap shape, allowing it to have a larger contact area in its axial direction through its own edge. At this point, an external thread that mates with the internal thread is provided on the outer sidewall of the guide cover 3's edge. The threaded connection between the guide cover 3 and the guide seat body 1 is achieved through the threaded engagement of the external thread and the internal thread in the oil scraper chamber 11, making disassembly and assembly more convenient.

[0029] More specifically, the guide cap 3 is provided with several tool holes 31. These tool holes 31 are arranged in a circular array around the axis of the central hole 12, achieving a uniform distribution of the tool holes 31 on the guide cap 3. This ensures that the guide cap 3 is subjected to uniform force, and the guide cap 3 can be easily screwed on by directly using tools to engage with the tool holes 31, making operation more convenient. It is worth noting that the tool holes 31 are all blind holes and will not affect the internal environment of the oil scraping chamber 11. At this time, the tool that cooperates with the tool hole 31 can be a structure including a tool ring, a rod, and a handle. The tool ring can be sleeved on the piston rod. Several rods corresponding to the tool holes 31 are provided on the side of the tool ring near the guide cover 3. At the same time, a handle extends radially from the outer side wall of the tool ring, so that when the guide cover 3 needs to be turned, the tool ring can be sleeved on the piston rod and the rods can be inserted into the corresponding tool holes 31. At this time, the guide cover 3 can be rotated by turning the handle, which facilitates the installation and removal of the guide cover 3 on the guide seat body 1.

[0030] More specifically, the upper limit assembly 5 used to limit the reverse rotation of the guide cover 3 includes a limiting piece 51. At this time, one end of the limiting piece 51 is installed on the guide seat body 1, and the other end of the limiting piece 51 is installed on the guide cover 3. That is, the connection between the guide cover 3 and the guide seat body 1 is realized through the limiting piece 51, thereby limiting the relative rotation of the guide cover 3, so that the guide cover 3 can no longer rotate, preventing the guide cover 3 from falling out in the reverse direction, and maintaining the stability of the position of the guide cover 3 after installation.

[0031] More specifically, a first limiting groove 32 is provided on the top surface of the guide cover 3, and the first limiting groove 32 is arranged radially along the central hole 12. At this time, a second limiting groove 13 is provided at the opening of the oil scraping cavity 11 of the guide seat body 1, which cooperates with the first limiting groove 32. The second limiting groove 13 is also arranged radially along the central hole 12, and the first limiting groove 32 and the second limiting groove 13 are located on the same straight line when the guide cover 3 is installed in place. During installation, the two ends of the limiting piece 51 are respectively inserted into the first limiting groove 32 and the second limiting groove 13, thereby realizing the circumferential limiting between the guide cover 3 and the guide seat body 1, making disassembly and assembly more convenient and the structural design more reasonable.

[0032] Figure 3 This is a schematic diagram illustrating the installation of a limiting piece with connecting holes according to a preferred embodiment of the present invention. Figures 2 to 3 As shown, a locking hole 131 is also provided at the bottom of the second limiting groove 13. At this time, a connecting hole 511 corresponding to the locking hole 131 is also provided on the end of the limiting piece 51 that is stuck in the second limiting groove 13. During installation, a screw is passed through the connecting hole 511 and connected to the locking hole 131. That is, after the screw is passed through the connecting hole 511 and connected to the locking hole 131, the limiting piece 51 can be stably installed in the second limiting groove 13, thereby preventing the limiting piece 51 from coming out of the first limiting groove 32 and the second limiting groove 13. The limiting effect is better and the reliability is higher.

[0033] In addition, this embodiment also provides another structure for stably installing the limiting plate. Figure 4 This is a structural diagram of the first limiting groove with a limiting protrusion according to a preferred embodiment of the present invention. Figure 2 and Figure 4 As shown, a limiting protrusion 132 is provided at the opening of the first limiting groove 32 and / or the second limiting groove 13. After the limiting piece 51 is inserted into the first limiting groove 32 and the second limiting groove 13, the limiting protrusion 132 can press the limiting piece 51, that is, squeeze the limiting piece 51 into the first limiting groove 32 and the second limiting groove 13 and past the limiting protrusion 132. The limiting protrusion 132 forms a blocking structure at the opening of the first limiting groove 32 and / or the second limiting groove 13, preventing the limiting piece 51 squeezed into the first limiting groove 32 and the second limiting groove 13 from being pulled out in the opposite direction. The structural design is more reasonable.

[0034] More specifically, the second limiting groove 13 located on the guide seat body 1 is arranged in an "L" shape. At this time, the second limiting groove 13 includes a horizontal section and a vertical section. The horizontal section and the vertical section are arranged along the radial and axial directions of the guide seat body 1, respectively, and are both set on the outer side wall of the guide seat body 1. This allows the second limiting groove 13 to have different arrangement directions on the guide seat body 1, thereby forming multiple limiting parts. This makes the limiting piece 51 more stable after being installed in the second limiting groove 13, and prevents displacement or slippage.

[0035] The shock absorber guide structure with easily replaceable oil scraper ring provided in this embodiment includes a guide seat body 1, an oil scraper ring 2, and a guide cover 3. The guide cover 3 is threadedly connected to the opening of the oil scraper cavity 11 of the guide seat body 1, enabling the removal and installation of the guide cover 3. Simultaneously, the oil scraper ring 2 is installed inside the oil scraper cavity 11 and located below the guide cover 3, with a gap between them. This allows for individual replacement of the oil scraper ring 2 when removing and installing the guide cover 3, eliminating the need to replace the entire guide structure and reducing operating costs. Furthermore, a limiting step 4 is provided at the bottom of the oil scraper cavity 11, and an upper limit component 5 is provided between the opening of the oil scraper cavity 11 and the guide cover 3. The limiting step 4 abuts against the lower end of the guide cover 3, and the upper limit component 5 restricts the circumferential rotation of the guide cover 3, thereby maintaining the accuracy of the guide cover 3's installation position and its position during use. This ensures that the installation and movement space of the oil scraper ring 2 remains stable, thus guaranteeing performance.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shock absorber guide structure with an easily replaceable oil scraper ring, comprising a guide seat body and an oil scraper ring, characterized in that, Also includes: The guide cover has one end connected to the shock absorber cylinder body, and the other end of the guide cover has a concave annular oil scraping chamber. The center of the oil scraping chamber has a central hole that extends through and connects to the shock absorber cylinder body. The piston rod passes through the central hole. The guide cover is provided at the opening of the oil scraping chamber and the two are threaded together. The oil scraping ring is provided in the oil scraping chamber and there is a gap between it and the guide cover. The bottom of the oil scraping chamber has a protruding limiting step that abuts against the bottom of the guide cover. An upper limit component is provided between the top of the guide cover and the opening of the oil scraping chamber of the guide cover body.

2. The shock absorber guide structure with easily replaceable oil scraper ring according to claim 1, characterized in that, The limiting step is a ring, and the limiting step is coaxially arranged with the oil scraping chamber. The bottom and outer side of the limiting step abut against the bottom and inner sidewall of the oil scraping chamber, respectively.

3. The shock absorber guide structure with easily replaceable oil scraper ring according to claim 2, characterized in that, The limiting step and the guide seat body are an integral structure.

4. The shock absorber guide structure with easily replaceable oil scraper ring according to claim 1, characterized in that, The inner wall of the oil scraping chamber is provided with an internal thread along the axial direction of the central hole, and the guide cap is arranged in a cap shape with an external thread on the outer wall of the cap edge that mates with the internal thread.

5. The shock absorber guide structure with easily replaceable oil scraper ring according to claim 1, characterized in that, The guide cap has a plurality of tool holes, which are arranged in a ring array with the axis of the central hole as the center.

6. The shock absorber guide structure with easily replaceable oil scraper ring according to claim 1, characterized in that, The upper limit assembly includes a limiting piece, one end of which is mounted on the guide seat body, and the other end of which is mounted on the guide cover.

7. The shock absorber guide structure with easily replaceable oil scraper ring according to claim 6, characterized in that, The top surface of the guide cap is provided with a first limiting groove, and the opening of the oil scraping cavity of the guide seat body is provided with a second limiting groove that cooperates with the first limiting groove. The two ends of the limiting piece are respectively inserted into the first limiting groove and the second limiting groove.

8. The shock absorber guide structure with easily replaceable oil scraper ring according to claim 7, characterized in that, The bottom of the second limiting groove is provided with a locking hole. The end of the limiting piece that is engaged in the second limiting groove is provided with a connecting hole corresponding to the locking hole. A screw passes through the connecting hole and connects to the locking hole.

9. The shock absorber guide structure with easily replaceable oil scraper ring according to claim 7, characterized in that, A limiting protrusion is provided at the opening of the first limiting groove and / or the second limiting groove. After the limiting piece is inserted into the first limiting groove and the second limiting groove, the limiting piece is pressed down by the limiting protrusion.

10. The shock absorber guide structure with an easily replaceable oil scraper ring according to claim 8 or 9, characterized in that, The second limiting groove is arranged in an "L" shape. The second limiting groove includes a horizontal section and a vertical section. The horizontal section and the vertical section are arranged along the radial and axial directions of the guide seat body, respectively, and are both located on the outer side wall of the guide seat body.

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