Small-resistance zero-compression-ratio casing pipe

Abstract

The utility model discloses a small resistance zero compression ratio casing pipe, including casing pipe unit and lining pipe, casing pipe unit first end is equipped with first through hole, and is equipped with first fillet between side and through hole, casing pipe unit second end is equipped with second through hole, and the end face of second end and second through hole is equipped with inner fillet. The radian of the inner fillet is matched with that of the first fillet, the inner diameter of the second through hole is larger than or equal to that of the first through hole, the sleeve units are connected end to end and connected to the lining pipe in a sleeved mode to form an outer pipe body, the first through hole of each sleeve unit is in clearance fit with the lining pipe, and the sleeve units are made of metal materials. The sleeve units are made of metal materials, the sleeve units are connected end to end and connected to the lining pipe in a sleeved mode, the length of the sleeve is not changed after long-term use, and therefore the stability of the stroke of the inhaul cable is guaranteed. The sleeve unit is in clearance fit with the lining pipe, the lining pipe is not extruded and deformed, it is ensured that the interior of the sleeve is smooth, and the moving resistance of the inhaul cable is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sleeve, in particular to a small resistance zero compression ratio sleeve. BACKGROUND

[0002] The motorcycle cable is a very important component in a motorcycle, which is mainly responsible for transmitting operating force, such as throttle, brake and clutch. The traditional cable sleeve is usually composed of an inner liner tube + steel wire + plastic coating layer, which plays a role in protecting the inner cable and providing guidance. In the design, the cable sleeve needs to consider multiple factors, including the selection of materials, manufacturing process, lubrication performance and fatigue resistance. High-quality cable sleeve can ensure the smoothness and reliability of operation, thereby improving the safety and comfort of riding. However, the traditional cable sleeve has some shortcomings. Under the condition of long-term stress, the length of the sleeve will be shortened, the cable stroke will be increased, and the operation performance will be affected. SUMMARY

[0003] In view of the existing technical deficiencies, the utility model provides a small resistance zero compression ratio sleeve.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a small resistance zero compression ratio sleeve, comprising a sleeve unit and an inner liner tube, the first end of the sleeve unit is provided with a first through hole, a first fillet is arranged between the side surface and the through hole, the second end of the sleeve unit is provided with a second through hole, an internal fillet is arranged between the end surface of the second end and the second through hole, the radian of the internal fillet matches the first fillet, the inner diameter of the second through hole is greater than or equal to the first through hole, a plurality of sleeve units are connected in series on the inner liner tube to form an outer tube body, the sleeve unit first through hole and the inner liner tube are gap matched, and the material of the sleeve unit is metal material.

[0005] The material of the sleeve unit is aluminum alloy.

[0006] The material of the inner liner tube is PE.

[0007] The pipe opening of the inner liner tube close to the second end of the outer tube body is provided with an expanding portion.

[0008] The pipe opening of the inner liner tube close to the first end of the outer tube body is provided with a flange portion.

[0009] The outer tube body first end is provided with a cap.

[0010] The utility model has the advantages that the material of the sleeve unit is metal material, a plurality of sleeve units are connected in series on the inner liner tube, the length of the sleeve will not change during long-term use, so as to ensure the stability of the cable stroke. The sleeve unit and the inner liner tube are gap matched, the inner liner tube is not extruded and deformed, the inside of the sleeve is ensured to be smooth, and the activity resistance of the cable is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is the sleeve unit section view of the utility model;

[0012] Fig. 2 It is the sleeve section view of the utility model. DETAILED DESCRIPTION

[0013] As Figs. 1-2 shown, a small resistance zero compression ratio sleeve, including sleeve unit 1 and inner liner pipe 2, first end of sleeve unit 1 is equipped with first through hole 11, and first round corner 12 is equipped between side and through hole, second end of sleeve unit 1 is equipped with second through hole 13, and inner round corner 14 is equipped between the end face of second end and second through hole 13, the radian of inner round corner 14 is matched with first round corner 12, the inner diameter of second through hole 13 is greater than or equal to first through hole 11, multiple sleeve units 1 are connected in series on inner liner pipe 2 and form outer pipe body 3, and sleeve unit 1 first through hole 11 and inner liner pipe 2 are gap matched, and the material of sleeve unit 1 is metal material.

[0014] The material of sleeve unit 1 is aluminum alloy, and the material of inner liner pipe 2 is PE.

[0015] The pipe orifice of inner liner pipe 2 close to the second end of outer pipe body 3 is equipped with flared portion 21, and the pipe orifice of inner liner pipe 2 close to the first end of outer pipe body 3 is equipped with flange portion 22, and outer pipe body 3 first end is equipped with cap 4, and cap 4 is riveted on sleeve unit 1 to prevent falling off.

[0016] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above examples, and the above examples and the description in the specification are only to illustrate the principle of the utility model, and simple changes and replacements of ordinary technical personnel in the art are within the protection scope of the utility model without departing from the spirit and scope of the utility model.

Claims

1. A low drag zero compression ratio bushing characterized by, The sleeve unit is provided with a first through hole at the first end, a first round corner between the side and the through hole, a second through hole at the second end, and an inner round corner between the end face of the second end and the second through hole, the radian of the inner round corner matches the first round corner, the inner diameter of the second through hole is greater than or equal to the first through hole, a plurality of sleeve units are connected in series on the inner liner to form an outer pipe body, the first through hole of the sleeve unit and the inner liner are gap fitted, and the material of the sleeve unit is metal material.

2. A low drag zero compression ratio bushing as claimed in claim 1, wherein, The material of the sleeve unit is aluminum alloy.

3. A low drag zero compression ratio bushing as in claim 1, wherein, The material of the inner liner is PE.

4. A low drag zero compression ratio bushing as in claim 1 wherein, The inner liner is provided with a flared portion near the pipe opening of the second end of the outer pipe body.

5. A low drag zero compression ratio bushing as defined in claim 1 wherein, The inner liner is provided with a flange portion near the pipe opening of the first end of the outer pipe body.

6. A low drag zero compression ratio bushing as claimed in claim 5, wherein, The outer pipe body is provided with a cap at the first end.

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