A guide oil seal structure for automotive shock absorbers

Abstract

This utility model relates to the technical field of guide oil seal structure for automotive shock absorbers, and discloses a guide oil seal structure for automotive shock absorbers, including a shock absorber cylinder and a shock absorber piston rod. An annular oil seal shell is fixedly installed on the inner surface of the shock absorber cylinder. An annular convex shell is provided on the lower end surface of the annular oil seal shell, and a conical convex opening is provided on the upper end surface of the annular oil seal shell. The inner surface of the annular convex shell is tightly attached to the outer surface of the shock absorber piston rod. By adopting the annular oil seal shell structure, a compressible rubber ring structure is built in. The rubber ring is expanded by the convex pressure sleeve, which can expand and compress the bottom of the annular convex shell, and can expand and tightly compress it to the outer surface of the shock absorber piston rod. The upper conical convex opening can be squeezed by the convex pressure sleeve, and can be tightly fitted to the outside of the shock absorber piston rod. It can tightly seal gaps, and the external extrusion force can continuously compress and tighten it, and the sealing performance will not decrease over time.

Description

Technical Field

[0001] This utility model relates to the technical field of guide oil seal structure for automotive shock absorbers, specifically a guide oil seal structure for automotive shock absorbers. Background Technology

[0002] As a key factor affecting vehicle handling stability and ride comfort, automotive shock absorbers play a crucial role in the competition within the automotive industry. It is worth noting that the working lubrication condition of the shock absorber piston rod has a direct impact on the performance and efficiency of the shock absorber. How to ensure that the shock absorber piston rod can move up and down smoothly while preventing oil leakage inside the shock absorber cylinder and effectively ensuring the normal operation of the shock absorber is a problem that needs to be solved.

[0003] In the prior art of automotive shock absorber oil seals, such as the one published in application CN120251659A, this invention relates to the field of automotive shock absorber technology, specifically a guide oil seal structure for automotive shock absorbers and its preparation method; the guide base has three layers of stepped holes inside, a check valve body is installed in the first layer of stepped holes, a metal bushing is provided in the third layer of stepped holes, the check valve body has three layers of stepped holes inside, an oil seal assembly is installed in the top layer of stepped holes, and an oil scraper ring is provided in the last layer of stepped holes, the center of the oil seal assembly is the oil seal inner hole, the two ends of the oil seal inner hole are respectively provided with lip one and lip three, the middle section is provided with lip two, a spring is sleeved on the outer side between lip two and lip three, and a check lip is provided on the outer side of the spring. The check lip presses on the check valve body to form a one-way valve. Compared with the prior art, this reduces the probability of oil and air leakage, reduces the howling noise caused by air flow, reduces friction noise, increases the sealing performance of the oil seal, improves material utilization, and reduces production costs;

[0004] In the aforementioned patent, the oil seal employs a complex lip structure. The lip used for sealing can be pressed against the outside of the shock absorber piston rod. When the shock absorber piston rod repeatedly slides and extends, the lip seal is prone to loosening and not tightly adhering, making it easy for oil to leak. Therefore, the sealing performance of the oil seal needs to be improved. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a guide oil seal structure for automotive shock absorbers, which solves the problem of complex sealing components and the problem that the sealing performance of oil seals weakens over time.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a guide oil seal structure for an automotive shock absorber, comprising a shock absorber cylinder and a shock absorber piston rod. An annular oil seal shell is fixedly installed on the inner surface of the shock absorber cylinder. An annular convex shell is provided on the lower end surface of the annular oil seal shell, and a conical protrusion is provided on the upper end surface of the annular oil seal shell. The inner surface of the annular convex shell is in close contact with the outer surface of the shock absorber piston rod, and the inner surface of the conical protrusion is in close contact with the outer surface of the shock absorber piston rod. An inner ring protrusion is provided on the inner surface of the conical protrusion, and the inner ring protrusion is distributed on the lower inner surface of the conical protrusion. An inner ring protrusion is provided on the upper inner surface of the conical protrusion. An annular rubber ring is filled on the inner surface of the annular convex shell, and a convex pressure sleeve is fixedly installed on the upper surface of the shock absorber cylinder.

[0007] Preferably, the lower end of the convex pressure sleeve is provided with an annular protrusion, and the lower annular protrusion is pressed against the upper surface of the annular rubber ring.

[0008] Preferably, the annular oil seal and the convex pressure sleeve are fixedly connected to the upper surface of the shock absorber cylinder by four sets of bolts.

[0009] Preferably, the inner ring protrusions are evenly distributed on the inner surface of the conical protrusion, and the inner ring protrusions are tightly attached to the outer surface of the shock absorber piston rod, and the inner surface of the inner ring protrusion is tightly attached to the outer surface of the shock absorber piston rod.

[0010] Preferably, the annular oil seal is made of rubber.

[0011] Preferably, the annular rubber ring is compressed and supported on the inner surface of the annular convex shell, and the inner end surface of the annular convex shell is attached to the outer surface of the shock absorber piston rod.

[0012] Preferably, the inner end of the convex pressure sleeve is provided with an inclined surface, which is tightly pressed against the upper outer surface of the conical protrusion.

[0013] Compared with the prior art, this utility model provides a guide oil seal structure for automotive shock absorbers, which has the following advantages:

[0014] By adopting an annular oil seal shell structure, a built-in compressible rubber ring structure is incorporated. The rubber ring expands through the convex pressure sleeve, which compresses the bottom of the annular convex shell. This expansion tightly compresses the outer surface of the shock absorber piston rod. Furthermore, the upper conical protrusion can be compressed by the convex pressure sleeve, allowing it to fit tightly against the outside of the shock absorber piston rod. This provides a tight seal at gaps, and the external extrusion force continuously compresses and tightens the seal, preventing it from diminishing or decreasing in sealing performance over time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first cross-section of the overall structure;

[0016] Figure 2 This is a schematic diagram of the second cross-section of the overall structure;

[0017] Figure 3 This is a schematic diagram showing the distribution relationship between the convex pressure sleeve and the annular rubber ring;

[0018] Figure 4 This is a schematic diagram of a partial structure of the annular oil seal shell;

[0019] Figure 5 This is an enlarged view of point A.

[0020] In the diagram: 1. Shock absorber cylinder, 2. Shock absorber piston rod, 3. Annular oil seal shell, 4. Annular convex shell, 5. Conical convex opening, 6. Inner ring protrusion, 7. Inner ring convex opening, 8. Annular rubber ring, 9. Convex pressure sleeve, 10. Bolt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides a technical solution: a guide oil seal structure for an automotive shock absorber, comprising a shock absorber cylinder 1 and a shock absorber piston rod 2. An annular oil seal shell 3 is fixedly installed on the inner surface of the shock absorber cylinder 1. An annular convex shell 4 is provided on the lower end surface of the annular oil seal shell 3, and a conical protrusion 5 is provided on the upper end surface of the annular oil seal shell 3. The inner surface of the annular convex shell 4 is in close contact with the outer surface of the shock absorber piston rod 2, and the inner surface of the conical protrusion 5 is in close contact with the outer surface of the shock absorber piston rod 2. An inner ring protrusion 6 is provided on the inner surface of the conical protrusion 5, and the inner ring protrusion 6 is distributed on the lower inner surface of the conical protrusion 5. The upper inner surface of the conical protrusion 5 is provided with an inner ring protrusion 7, the inner surface of the annular convex shell 4 is filled with an annular rubber ring 8, and the upper surface of the shock absorber cylinder 1 is fixedly installed with a convex pressure sleeve 9. By adopting an annular oil seal shell structure, the built-in compressible rubber ring structure is used. The rubber ring is expanded by the convex pressure sleeve, which can expand and compress the bottom of the annular convex shell. It can expand and tightly compress the outer surface of the shock absorber piston rod. The upper conical protrusion can be squeezed by the convex pressure sleeve and can be tightly fitted to the outside of the shock absorber piston rod. It can tightly seal the gaps and has the external extrusion force to keep it pressed and tightened. It will not reduce the sealing performance over time.

[0023] The lower end of the convex pressure sleeve 9 is provided with an annular protrusion, which presses against the upper surface of the annular rubber ring 8. When the convex pressure sleeve 9 presses against the annular rubber ring 8, the annular rubber ring 8 is compressed and can expand and deform from the inner end, which can expand and press against the annular convex shell 4 of the annular oil seal shell 3. At this time, the annular protrusion 4 can expand and press against the outer surface of the shock absorber piston rod 2; it can fit tightly and improve the sealing force.

[0024] The annular oil seal 3 and the convex pressure sleeve 9 are fixedly connected to the upper surface of the shock absorber cylinder 1 by four sets of bolts 10; the bolts 10 can lock and fix the annular oil seal 3 and the convex pressure sleeve 9, which is convenient for installation;

[0025] The inner ring protrusions 6 are evenly distributed on the inner surface of the conical protrusion 5. The inner ring protrusions 6 are tightly attached to the outer surface of the shock absorber piston rod 2, and the inner surface of the inner ring protrusion 7 is tightly attached to the outer surface of the shock absorber piston rod 2. This can tightly fit and seal the shock absorber piston rod 2 to prevent oil leakage.

[0026] The annular oil seal housing 3 is made of rubber; the annular rubber ring 8 is squeezed and supported on the inner surface of the annular convex shell 4, and the inner end surface of the annular convex shell 4 is attached to the outer surface of the shock absorber piston rod 2.

[0027] The inner end of the convex pressure sleeve 9 is provided with an inclined surface, which is tightly pressed against the upper outer surface of the conical protrusion 5. As the inclined surface is pressed and tightened, the conical protrusion 5 can be pressed and contracted inward, which can tightly seal the outside of the shock absorber piston rod 2, improve the sealing force, and not easily weaken the sealing performance.

[0028] The working principle of this device is as follows: During use, the annular oil seal shell 3 and the convex pressure sleeve 9 are fixedly connected to the upper surface of the shock absorber cylinder 1 by four sets of bolts 10; the bolts 10 can lock and fix the annular oil seal shell 3 and the convex pressure sleeve 9, making installation convenient; the lower end surface of the annular oil seal shell 3 is provided with an annular convex shell 4, and the inner surface of the annular convex shell 4 is filled with an annular rubber ring 8. The lower end of the convex pressure sleeve 9 is provided with an annular protrusion, and its lower annular protrusion presses against the upper surface of the annular rubber ring 8; when the convex pressure sleeve 9 presses against the annular rubber ring 8, the annular rubber ring 8 is compressed and can expand and deform from the inner end, which can expand and press against the annular convex shell 4 of the annular oil seal shell 3. At this time, the annular protrusion 4 can expand and press against the outer surface of the shock absorber piston rod 2; it can fit tightly and improve the sealing force;

[0029] The upper surface of the annular oil seal housing 3 is provided with a conical protrusion 5, and the inner surface of the conical protrusion 5 is provided with an inner ring protrusion 6. The inner ring protrusion 6 is distributed on the lower inner surface of the conical protrusion 5, and the upper inner surface of the conical protrusion 5 is provided with an inner ring protrusion 7. The inner end of the convex pressure sleeve 9 is provided with an inclined surface, which is tightly pressed against the upper outer surface of the conical protrusion 5. As the inclined surface is pressed and tightened, the conical protrusion 5 can be pressed inward and contracted, and can be tightly fitted onto the outside of the shock absorber piston rod 2. The seal is improved, enhancing the sealing force and preventing weakening of the sealing performance. Furthermore, the inner ring protrusions 6 are evenly distributed on the inner surface of the conical protrusion 5, and the inner ring protrusions 6 are tightly fitted to the outer surface of the shock absorber piston rod 2. The inner surface of the inner ring protrusion 7 is also tightly fitted to the outer surface of the shock absorber piston rod 2. This ensures a tight seal against the shock absorber piston rod 2, preventing oil leakage. The mechanism is simple, allowing for the application of external force for a tight seal, thus avoiding the problem of weakened sealing over long-term use.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A guide oil seal structure for an automobile shock absorber, comprising a shock absorber cylinder (1), a shock absorber piston rod (2), characterized in that: An annular oil seal shell (3) is fixedly installed on the inner surface of the shock absorber cylinder (1). An annular convex shell (4) is provided on the lower end surface of the annular oil seal shell (3). A conical convex opening (5) is provided on the upper end surface of the annular oil seal shell (3). The inner surface of the annular convex shell (4) is in close contact with the outer surface of the shock absorber piston rod (2). The inner surface of the conical convex opening (5) is in close contact with the outer surface of the shock absorber piston rod (2). An inner ring protrusion (6) is provided on the inner surface of the conical convex opening (5). The inner ring protrusion (6) is distributed on the lower inner surface of the conical convex opening (5). An inner ring protrusion (7) is provided on the upper inner surface of the conical convex opening (5). An annular rubber ring (8) is filled on the inner surface of the annular convex shell (4). A convex pressure sleeve (9) is fixedly installed on the upper surface of the shock absorber cylinder (1).

2. The deflector oil seal structure for an automobile shock absorber according to claim 1, characterized by: The lower end of the convex pressure sleeve (9) is provided with an annular protrusion, and the lower annular protrusion is pressed against the upper surface of the annular rubber ring (8).

3. The deflector oil seal structure for an automobile shock absorber according to claim 1, characterized by: The annular oil seal shell (3) and the convex pressure sleeve (9) are fixedly connected to the upper surface of the shock absorber cylinder (1) by four sets of bolts (10).

4. The deflector oil seal structure for an automobile shock absorber according to claim 1, characterized by: The inner ring protrusions (6) are evenly distributed on the inner surface of the conical protrusion (5). The inner ring protrusions (6) are tightly attached to the outer surface of the shock absorber piston rod (2), and the inner surface of the inner ring protrusion (7) is tightly attached to the outer surface of the shock absorber piston rod (2).

5. The deflector oil seal structure for an automobile shock absorber according to claim 1, characterized by: The annular oil seal shell (3) is made of rubber.

6. The guide oil seal structure for an automotive shock absorber according to claim 1, characterized in that: The annular rubber ring (8) is pressed and supported on the inner surface of the annular convex shell (4), and the inner end surface of the annular convex shell (4) is attached to the outer surface of the shock absorber piston rod (2).

7. The deflector oil seal structure for an automobile shock absorber according to claim 1, characterized by: The inner end of the convex pressure sleeve (9) is provided with an inclined surface, which is tightly pressed against the upper outer surface of the conical protrusion (5).

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