Composite sleeve of guide seat

Abstract

The utility model belongs to the technical field of front shock absorber accessories of motorcycles, and particularly relates to a guide seat composite sleeve which comprises a guide cylinder seat, and a butt joint hole, a communicating hole and a mounting hole are sequentially formed in the center of the guide cylinder seat from bottom to top in a penetrating mode. The rubber barrel is clamped in the guide barrel seat through a positioning structure, the hole diameter of a central through hole of the rubber barrel is smaller than that of the communicating hole and that of the butt joint hole, the positioning structure is located at a flange in the middle of the peripheral wall of the rubber barrel, and clearance spaces exist between the upper peripheral wall and the lower peripheral wall of the rubber barrel and the hole wall of the mounting hole; the problems that a piston rod body is abraded and the piston rod is damaged due to friction contact between the piston rod and an inner layer of a guide seat composite sleeve in the moving process of the piston rod in the inner layer due to the fact that the turning displacement space between the piston rod and the inner layer of the guide seat composite sleeve is small are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motorcycle front shock absorber accessory technical field, concretely relates to a guide seat composite sleeve. BACKGROUND

[0002] The motorcycle front shock absorber guide seat composite sleeve is a key component in the shock absorption system, mainly used for reducing friction, ensuring the smoothness of the shock absorber movement, and protecting the internal components from dust and impurities. The existing guide seat composite sleeve typically includes an outer layer and an inner layer. The outer layer is usually a metal (such as copper alloy, steel) base that provides structural support. The inner layer is a spacer sleeve that isolates between the base and the piston rod, reducing the friction coefficient.

[0003] When the motorcycle front shock absorber is assembled and used, the movement of the piston rod in the inner layer of the guide seat composite sleeve is not completely along the vertical direction due to external vibration factors, resulting in a certain deviation movement. However, the space for directional displacement between the piston rod and the inner layer of the guide seat composite sleeve is small, causing the piston rod to rub against the inner layer of the guide seat composite sleeve during movement, which wears the piston rod body and damages the piston rod. SUMMARY

[0004] Based on the problems mentioned in the background technology, the utility model provides a guide seat composite sleeve to solve the problem of damage to the piston rod caused by the small space for directional displacement between the piston rod and the inner layer of the guide seat composite sleeve, which causes the piston rod to rub against the inner layer of the guide seat composite sleeve during movement, which wears the piston rod body and damages the piston rod.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A guide seat composite sleeve, comprising:

[0007] A guide cylinder seat, the center of which is sequentially provided with a butt joint hole, a communication hole and a mounting hole from bottom to top;

[0008] A rubber cylinder, which is clamped in the guide cylinder seat through a positioning structure, the hole diameter of the center through hole of the rubber cylinder is smaller than the hole diameters of the communication hole and the butt joint hole, the positioning structure is located at the outer peripheral wall middle flange of the rubber cylinder, and there is a gap space between the upper and lower outer peripheral walls of the rubber cylinder and the hole wall of the mounting hole.

[0009] Based on the above technical scheme, the utility model has the following improvements:

[0010] Further, the positioning structure includes an annular clamping groove, which is provided in the outer peripheral wall middle flange of the rubber cylinder, a rubber ring is sleeved in the annular clamping groove, the hole wall of the mounting hole is provided with a positioning arc groove, and the rubber ring is clamped in the positioning arc groove.

[0011] Furthermore, the rubber sleeve is made of polytetrafluoroethylene.

[0012] Furthermore, the upper outer peripheral wall of the guide cylinder seat is provided with a threaded portion.

[0013] Furthermore, the mounting hole is a tapered hole with a certain taper, and its top diameter is smaller than its bottom diameter.

[0014] The beneficial effects of this utility model are:

[0015] The guide sleeve is formed by combining the guide cylinder seat, the rubber cylinder, and the positioning structure. The positioning structure can securely hold the rubber cylinder in the guide cylinder seat. Since the positioning structure is located at the flange in the middle of the outer peripheral wall of the rubber cylinder, there is a gap between the upper and lower outer peripheral walls of the rubber cylinder and the wall of the mounting hole. This allows the upper and lower outer peripheral walls of the rubber cylinder to move into the gap between themselves and the wall of the mounting hole when the piston rod moves in the rubber cylinder due to external vibration. This avoids damage caused by hard contact and friction between the piston rod and the rubber cylinder. Attached Figure Description

[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0017] Fig. 1 This is a structural diagram of a guide seat composite sleeve according to the present invention;

[0018] Fig. 2 This is a three-dimensional sectional view of a guide seat composite sleeve according to the present invention;

[0019] Fig. 3 This is a planar sectional view of a guide seat composite sleeve according to the present invention.

[0020] The attached diagram is labeled as follows:

[0021] 101. Guide sleeve seat; 102. Butt hole; 103. Connecting hole; 104. Mounting hole; 105. Threaded part; 201. Rubber sleeve; 202. Annular groove; 203. Positioning arc groove; 204. Rubber ring. Detailed Implementation

[0022] like Figs. 1-3 As shown, a guide seat composite sleeve includes:

[0023] The guiding cylinder seat 101 is sequentially provided with a butt joint hole 102, a communication hole 103 and a mounting hole 104 from bottom to top; the rubber cylinder 201 is clamped in the guiding cylinder seat 101 through a positioning structure, the positioning structure comprises an annular clamping groove 202 arranged in the middle flange of the outer circumferential wall of the rubber cylinder 201, a rubber ring 204 sleeved in the annular clamping groove 202, a positioning arc groove 203 arranged on the hole wall of the mounting hole 104, and the rubber ring 204 clamped in the positioning arc groove 203; the rubber ring 204 is located in the positioning arc groove 203 and the annular clamping groove 202, and can position the rubber cylinder 201 and make the rubber cylinder 201 stably clamped in the mounting hole 104; and the arrangement of the rubber ring 204 can also prevent dust from entering the bottom of the mounting hole 104.

[0024] The rubber cylinder 201 is made of polytetrafluoroethylene, so that the rubber cylinder 201 has ultralow friction coefficient and weather resistance; after the rubber cylinder 201 is clamped in the mounting hole 104, the mounting hole 104 is a tapered hole with a certain taper, and the top diameter of the mounting hole 104 is smaller than the bottom diameter, so that the rubber cylinder 201 clamped in the mounting hole 104 is not easy to slide out from the top of the mounting hole 104, thereby further enhancing the stability of the rubber cylinder 201 in the mounting hole 104.

[0025] The hole diameters of the through holes in the center of the rubber cylinder 201 are all smaller than the hole diameters of the communication hole 103 and the butt joint hole 102, so that after the piston rod is clamped in the through hole in the center of the rubber cylinder 201, the piston rod cannot contact the hole walls of the communication hole 103 and the butt joint hole 102.

[0026] Since the positioning structure is located at the middle flange of the outer circumferential wall of the rubber cylinder 201, there are gap spaces between the upper and lower outer circumferential walls of the rubber cylinder 201 and the hole wall of the mounting hole 104, so that when the piston rod moves in the rubber cylinder 201 and deviates in the radial direction due to external vibration factors, the piston rod can abut and press the rubber cylinder 201, so that the upper and lower outer circumferential walls of the rubber cylinder 201 can respectively move and avoid the gap spaces between the rubber cylinder 201 and the hole wall of the mounting hole 104, thereby avoiding damage caused by hard contact and friction between the piston rod and the rubber cylinder 201.

[0027] The upper outer circumferential wall of the guiding cylinder seat 101 is provided with a threaded portion 105, the threaded portion 105 can be connected with the inner mouth portion of one end of the piston rod protection cylinder of the front shock absorber, so that the guiding seat composite sleeve is assembled at the end portion of the piston rod protection cylinder of the front shock absorber.

[0028] The utility model has been described in detail. The description of the specific embodiments is only used to help understand the method and the core idea of the utility model. It should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the utility model, the utility model can be improved and modified in many ways, and these improvements and modifications also fall within the protection scope of the utility model claims.

Claims

1. A guide seat composite sleeve characterized by: Include: The guide cylinder seat (101) is sequentially provided with a butt joint hole (102), a communication hole (103) and a mounting hole (104) from bottom to top in the center; The rubber cylinder (201) is clamped in the guide cylinder seat (101) through a positioning structure, the hole diameter of the through hole in the center of the rubber cylinder (201) is smaller than the hole diameter of the communication hole (103) and the butt joint hole (102), the positioning structure is located at the middle flange of the outer peripheral wall of the rubber cylinder (201), and there is a gap space between the upper and lower outer peripheral walls of the rubber cylinder (201) and the hole wall of the mounting hole (104).

2. A composite sleeve according to claim 1, wherein: The positioning structure comprises an annular clamping groove (202) arranged in the middle flange of the outer peripheral wall of the rubber cylinder (201), a rubber ring (204) is sleeved in the annular clamping groove (202), the hole wall of the mounting hole (104) is provided with a positioning arc groove (203), and the rubber ring (204) is clamped in the positioning arc groove (203).

3. The composite sleeve of claim 1, wherein: The rubber cylinder (201) is made of polytetrafluoroethylene.

4. The composite sleeve of claim 1, wherein: The outer peripheral wall of the upper part of the guide cylinder seat (101) is provided with a threaded portion (105).

5. The composite sleeve of claim 1, wherein: The mounting hole (104) is a tapered hole with a certain taper, and the top diameter is smaller than the bottom diameter.

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