Motorcycle shock absorber connecting rod guide structure

Abstract

The utility model discloses a motorcycle shock absorber connecting rod guiding structure which comprises a piston cylinder. The guide sleeve is fixedly sleeved in the piston cylinder, and an annular groove is formed in the inner wall of the guide sleeve; the guide ring is attached to the connecting rod in a sleeving mode and arranged in the annular groove, a gap is formed between the outer diameter face of the guide ring and the annular groove, and the connecting rod and the guide sleeve are arranged at intervals; according to the connecting rod guide structure of the motorcycle shock absorber, the connecting rod and the guide sleeve are arranged at intervals and do not make direct contact with the guide sleeve, so that friction is reduced; meanwhile, the radial position of the connecting rod can be adjusted through the guide ring attached to the connecting rod in a sleeving mode, automatic alignment of the axis of the connecting rod and the center line of a piston ring of the shock absorber is facilitated, the friction performance of the shock absorber in the movement process is improved, and the use comfort and durability of the shock absorber are improved; and meanwhile, the device is suitable for connecting rod guiding of long-stroke and short-stroke shock absorbers.

Description

Technical Field

[0001] The utility model belongs to the technical field of motorcycle shock absorber structure design, and in particular relates to a motorcycle shock absorber connecting rod guide structure. Background Art

[0002] The internal connecting rod of the existing motorcycle shock absorber is generally guided directly by a coated DU bushing. This type of guiding structure has extremely high requirements for the concentricity between the connecting rod, DU bushing and piston cylinder. Affected by factors such as processing and assembly errors, the actual use effect is poor. Especially for shock absorbers with a long stroke, the DU bushing is equivalent to a simple support point. If the connecting rod is slightly tilted, a large friction and lateral force will be generated at the joint between the connecting rod and the DU bushing. In addition, during the operation of the connecting rod, the piston ring will be forced to slide obliquely on the inner wall of the piston cylinder on one side. The friction generated at the piston ring is also large, which seriously affects the friction performance of the shock absorber during movement, and further affects the comfort and durability of the shock absorber. Therefore, it is urgent to provide a new guiding structure for the connecting rod of a motorcycle shock absorber, which is expected to reduce the requirements for manufacturing accuracy, and at the same time, it can help improve the friction performance of the shock absorber during movement, and improve the comfort and durability of the shock absorber. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a motorcycle shock absorber connecting rod guide structure, which can reduce the requirements for manufacturing precision, and at the same time can help improve the friction performance of the shock absorber during movement, thereby improving the comfort and durability of the shock absorber.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a motorcycle shock absorber connecting rod guide structure, comprising: a piston cylinder; a guide sleeve, which is fixedly sleeved on the piston cylinder and has an annular groove on the inner wall of the guide sleeve; a guide ring, which is fitted on the connecting rod and is arranged in the annular groove, and a gap is provided between the outer diameter surface of the guide ring and the annular groove, and the connecting rod and the guide sleeve are arranged at a distance.

[0005] Furthermore, a side gap is provided between the guide ring and the side wall of the annular groove in the axial direction.

[0006] Furthermore, the guide ring is provided with a fracture.

[0007] Furthermore, the guide ring is a PTFE ring.

[0008] Furthermore, the side clearance has a value range of 1-3 mm.

[0009] Furthermore, the guide sleeve is embedded in the port portion of the piston cylinder, and a limit ring abutting against the guide sleeve is fixed to the port of the piston cylinder.

[0010] Furthermore, an axial limiting groove is provided on the outer diameter surface of the guide sleeve, and a limiting protrusion matched with the axial limiting groove is provided on the inner wall surface of the piston cylinder.

[0011] Furthermore, a buffer pad is attached to one side of the guide sleeve close to the inner side of the piston cylinder.

[0012] Furthermore, the ratio of the lengths of the guide ring and the guide sleeve in the axial direction ranges from 0.1 to 0.3.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the motorcycle shock absorber connecting rod guide structure provided by the utility model, the connecting rod and the guide sleeve are arranged at an interval, and there is no direct contact with the guide sleeve, which is conducive to reducing friction; at the same time, the radial position of the connecting rod can be adjusted by fitting the guide ring of the outer sleeve on the connecting rod, which is conducive to automatic alignment of the connecting rod axis and the center line of the shock absorber piston ring, thereby improving the friction performance of the shock absorber during movement, and improving the comfort and durability of the shock absorber; at the same time, it is suitable for connecting rod guides of long-stroke and short-stroke shock absorbers, and the manufacturing precision requirements are reduced to a certain extent; specifically, since the outer diameter surface of the guide ring is close to the annular There is a gap between the grooves, that is, the guide ring and the connecting rod are in a floating position. When the connecting rod piston end tilts to one side, the guide ring moves accordingly. At this time, the guiding effect of the piston ring on the piston will make the connecting rod automatically align during the movement; even if the guide ring is tilted, it will not generate lateral force on the connecting rod like the traditional DU bushing, and the connecting rod will not force the piston ring to move laterally. On the contrary, the piston ring will guide the connecting rod, so that the piston ring is always in uniform contact with the inner wall of the working cylinder. The friction positive force generated by the movement of the piston ring is small, that is, the friction force generated is small, which improves the friction performance of the shock absorber.

[0015] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A partial cross-sectional view of the utility model

[0017] Figure 2 Schematic diagram of the local structure section of the shock absorber

[0018] Figure 3 Schematic diagram of the overall structure of the shock absorber

[0019] Figure 4 Schematic diagram of the guide ring shaft side structure

[0020] Figure numerals: 1-piston cylinder; 101-limiting protrusion; 2-guide sleeve; 201-annular groove; 202-axial limiting groove; 3-guide ring; 3a-side clearance; 301-break; 4-connecting rod; 5-limiting retaining ring; 6-buffer pad; 7-piston. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

[0022] In the following text, the axial direction mentioned refers to the length direction of the shock absorber unless otherwise specified.

[0023] See also Figure 1-3 This embodiment discloses a motorcycle shock absorber connecting rod guide structure, including:

[0024] The piston cylinder 1, i.e. the working cylinder, has a connecting rod 4 driving a piston 7 to reciprocate in the piston cylinder 1;

[0025] The guide sleeve 2 is fixedly sleeved on the piston cylinder 1 and an annular groove 201 is provided on the inner wall of the guide sleeve. Here, the guide sleeve 2 is preferably fixed to the piston cylinder 1 by interference fit, and the annular groove 201 is designed near the middle section of the guide sleeve 2;

[0026] The guide ring 3 is fitted with the outer sleeve on the connecting rod 4 and is arranged in the annular groove 201, and a gap is provided between the outer diameter surface of the guide ring 3 and the annular groove 201. The connecting rod 4 and the guide sleeve 2 are arranged at intervals. Here, "fitting with the outer sleeve" means that the inner diameter surface of the guide ring 3 is always fitted with the connecting rod 4. Of course, it is necessary to ensure that the connecting rod 4 and the guide ring 3 can slide relative to each other. It can be understood that the connecting rod 4 completes the guidance of axial movement through the overall structure formed by the guide ring 3 and the guide sleeve 2, ensuring that the connecting rod 4 will not deviate excessively during movement;

[0027] In the above structural design, the connecting rod 4 and the guide sleeve 2 are spaced apart, that is, the diameter of the connecting rod 4 is smaller than the inner diameter of the guide sleeve 2, and the connecting rod 4 does not directly contact the guide sleeve 2, which is beneficial to reduce friction; at the same time, the radial position of the connecting rod 4 can be adjusted by fitting the guide ring 3 that is outer-mounted on the connecting rod 4, which is beneficial to the automatic alignment of the connecting rod 4 axis and the center line of the shock absorber piston ring, improves the friction performance of the shock absorber during movement, improves the comfort and durability of the shock absorber, and is suitable for connecting rod guides of long-stroke and short-stroke shock absorbers; reduces the manufacturing accuracy requirements to a certain extent, that is, reduces the concentricity requirements of the guide sleeve 2, the connecting rod 4 and the piston cylinder 1; specifically, Since there is a gap between the outer diameter surface of the guide ring 3 and the annular groove 201, that is, the matching position of the guide ring 3 and the connecting rod 4 is in a floating position, when the piston end of the connecting rod 4 tilts to one side, the guide ring 4 also moves. At this time, the guiding effect of the piston ring on the piston 7 will make the connecting rod 4 automatically align during the movement; even if the guide ring 3 is tilted, it will not generate lateral force on the connecting rod 4 like the traditional DU bushing, and the connecting rod 4 will not force the piston ring to move laterally. On the contrary, the piston ring will guide the connecting rod 4, so that the piston ring 4 is always in uniform contact with the inner wall of the working cylinder, and the friction positive force generated by the movement of the piston ring is small, that is, the friction force generated is small, thereby improving the friction performance of the shock absorber.

[0028] In the present embodiment, a side gap 3a is provided between the guide ring 3 and the side wall of the annular groove 201 in the axial direction, that is, the thickness of the guide ring 3 is smaller than the width of the annular groove 201; by reserving the side gap 3a, it is helpful to reduce the friction during the radial displacement of the guide ring 3, compensate for the dimensional change caused by thermal deformation, and avoid the guide ring 3 from getting stuck; the reliability of use is improved; at the same time, it is beneficial to the assembly of the guide ring 3; of course, it can be understood that during use, the pressure of the oil in the piston cylinder will cause the guide ring 3 to be pressed tightly against one side of the axial direction of the annular groove 201, thereby ensuring the generation of damping force and not affecting the working performance of the shock absorber.

[0029] In this embodiment, the guide ring 3 is provided with a break 301. The design of the break 301 facilitates the assembly of the guide ring 3 on the annular groove 201 or the connecting rod 4. At the same time, it facilitates the guide ring 3 to have better shrinkage, which facilitates the guide ring 3 to better fit on the connecting rod 4 and does not affect the axial reciprocating motion of the connecting rod 4.

[0030] In this embodiment, the guide ring 3 is a PTFE ring, that is, a guide ring made of PTFE material; the PTFE ring has good plastic deformation ability and good toughness. At the same time, it has good wear resistance and a low friction coefficient, which is beneficial to further improve the friction performance of the shock absorber.

[0031] In this embodiment, the side clearance 3a has a value range of 1-3 mm; within this range, the guide ring 3 operates reliably and can better limit the axial position of the guide ring 3 to avoid excessive relative displacement between the guide ring 3 and the connecting rod 4 in the axial direction.

[0032] In this embodiment, the guide sleeve 2 is embedded in the end portion of the piston cylinder 1, and a limit ring 5 is fixed at the end portion of the piston cylinder 1 to abut against the guide sleeve 2; the guide sleeve 2 is embedded in the end portion of the piston cylinder 1, which is convenient for assembly and ensures that the piston cylinder 1 has a large stroke; the limit ring 5 is provided to prevent the guide sleeve 2 from falling off during operation.

[0033] In this embodiment, an axial limit groove 202 is provided on the outer diameter surface of the guide sleeve 2, and a limit protrusion 101 that cooperates with the axial limit groove 202 is provided on the inner wall surface of the piston cylinder 1; specifically, the axial limit groove 202 here is an annular structural groove, and the limit protrusion 101 is correspondingly set to an annular protrusion; of course, in other embodiments, the axial limit groove 202 can also be a single-point groove, etc.; by designing the axial limit groove 202 and the limit protrusion 101, it is beneficial to ensure the stability of the axial position of the guide sleeve 2 in the piston cylinder, improve the durability of use, and improve the structural stability.

[0034] In this embodiment, a buffer pad 6 is attached to the side of the guide sleeve 2 close to the piston cylinder 1. The buffer pad 6 is preferably a rubber pad. The buffer pad 6 is designed to serve as a spring seat for the shock-absorbing spring to prevent the shock-absorbing spring from directly abutting against the guide sleeve 2, which helps to reduce spring wear and abnormal noise during operation.

[0035] In this embodiment, the ratio of the length of the guide ring 3 to the guide sleeve 2 in the axial direction ranges from 0.1 to 0.3; this range is reasonably designed, the guide ring 3 has a good receiving effect, and has a good guiding effect on the connecting rod.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A motorcycle shock absorber connecting rod guide structure, characterized in that: include: Piston cylinder (1); A guide sleeve (2) is fixed to the piston cylinder (1) and an annular groove (201) is provided on the inner wall of the guide sleeve; The guide ring (3) is fitted onto the outer sleeve of the connecting rod (4) and is arranged in the annular groove (201), and a gap is provided between the outer diameter surface of the guide ring (3) and the annular groove (201), and the connecting rod (4) and the guide sleeve (2) are arranged at a distance.

2. The motorcycle shock absorber connecting rod guide structure according to claim 1, characterized in that: A side gap (3a) is provided between the guide ring (3) and the side wall of the annular groove (201) in the axial direction.

3. The motorcycle shock absorber connecting rod guide structure according to claim 2, characterized in that: The guide ring (3) is provided with a fracture (301).

4. The motorcycle shock absorber connecting rod guide structure according to claim 3, characterized in that: The guide ring (3) is a PTFE ring.

5. The motorcycle shock absorber connecting rod guide structure according to claim 2, characterized in that: The side clearance (3a) has a value range of 1-3 mm.

6. The motorcycle shock absorber connecting rod guide structure according to claim 1, characterized in that: The guide sleeve (2) is embedded in the end portion of the piston cylinder (1), and a limit ring (5) abutting against the guide sleeve (2) is fixed on the end portion of the piston cylinder (1).

7. The motorcycle shock absorber connecting rod guide structure according to claim 6, characterized in that: An axial limiting groove (202) is provided on the outer diameter surface of the guide sleeve (2), and a limiting protrusion (101) matching the axial limiting groove (202) is provided on the inner wall surface of the piston cylinder (1).

8. The motorcycle shock absorber connecting rod guide structure according to claim 6, characterized in that: A buffer pad (6) is attached to one side of the guide sleeve (2) close to the inside of the piston cylinder (1).

9. The motorcycle shock absorber connecting rod guide structure according to claim 1, characterized in that: The ratio of the length of the guide ring (3) to that of the guide sleeve (2) in the axial direction ranges from 0.1 to 0.3.

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