CN110553102A

CN110553102A - Thermoplastic elastomer sheath for brake pipe

Info

Publication number: CN110553102A
Application number: CN201910679274.0A
Authority: CN
Inventors: 符寿康; 朱爱华; 陶平; 冯程; 任建民; 康鑫
Original assignee: Nanjing Orientleader Technology Co Ltd
Current assignee: Nanjing Orientleader Technology Co Ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2019-12-10
Anticipated expiration: 2039-07-24
Also published as: CN110553102B

Abstract

The invention discloses a thermoplastic elastomer sheath for a brake pipe, which comprises a sheath sleeved on a rubber pipe, wherein the sheath is made of a thermoplastic elastomer material, a groove hole is formed in the outer side wall of the sheath, the groove hole extends inwards to a sheath connecting part, the sheath connecting part is sleeved on the periphery of the rubber pipe, the groove hole forms a weak structure when the sheath is stressed, and the sheath connecting part and the solid part of the sheath form a strong structure when the sheath is stressed. The invention uses the injection molding process, greatly improves the production efficiency; and the strong and weak structure improves the pressure of the sheath on the rubber pipe when the sheath is stressed, thereby improving the friction force between the sheath and the rubber pipe interface and ensuring that the sheath and the rubber pipe are not easy to move relatively.

Description

Thermoplastic elastomer sheath for brake pipe

Technical Field

The invention relates to a brake hose in an automobile brake system, in particular to a thermoplastic elastomer sheath of a brake pipe.

Background

With the rapid development of the automobile industry, the requirement on environmental protection is more and more strict, and the requirement on the light weight of the automobile is more and more strict. Therefore, in designing the automobile pipe, materials that are lightweight and recyclable are used as much as possible. At present, the main problems of the automobile brake hose are as follows: 1. the weight of the used metal material is high, and the weight of the rubber pipe assembly is increased; 2. the rubber sheath is used in the market, the assembly time is long, multiple persons are needed for cooperation, and the efficiency is low; 3. the existing rubber sheath is easy to slide, and is easy to slide with a rubber tube when stressed, so that the service life of the rubber tube is influenced; 4. the rubber sheath is not environment-friendly and can not be reused.

The main problem of solving of this patent is: 1. the thermoplastic elastomer is used, so that the weight is reduced; 2. the thermoplastic elastomer can be reused, the production process is simple, and the energy consumption is low. 3. The thermoplastic elastomer can be integrally injected with the rubber tube, so that the production efficiency is high; 4. the thermoplastic elastomer is used for injection molding, and the rubber tube is not easy to slide without glue.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a thermoplastic elastomer sheath for a brake pipe.

The technical scheme adopted by the invention is as follows: the utility model provides a brake pipe thermoplastic elastomer sheath, establishes the sheath on the rubber tube including the cover, the sheath adopts the thermoplastic elastomer material preparation, and it has the recess hole to open on the lateral wall of sheath, the recess hole inwards extends to set body connecting portion, set body connecting portion cup joint around the rubber tube, the recess hole forms the weak structure when the sheath atress, and set body connecting portion and sheath solid part form the strong structure when the sheath atress.

Furthermore, the groove holes are distributed on two sides of the outer side wall of the sheath, and the groove holes on the two sides are arranged oppositely.

Furthermore, at least two groove holes are arranged on each side. Preferably, the recess holes are provided in a total of eight, four on each side.

Furthermore, the distance between the upper part and the lower part of the groove hole on the same side is 2.5-3.5mm, and the distance between the left part and the right part is 2-3 mm.

Furthermore, the length of the opening of the groove hole is 5.5-6.5mm, and the width of the opening of the groove hole is 3.5-4.5 mm.

Furthermore, the thickness of the sleeve connecting part is 2-4 mm.

Further, the distance between the upper surface and the lower surface of the sheath is 14-18 mm.

Further, the sheath is made of a mixture of any two of SEBS, EPDM and PP.

furthermore, the sheath is integrally formed by adopting an injection molding process.

The invention has the beneficial effects that: the invention adopts the thermoplastic elastomer material which is convenient to recycle, does not need to be vulcanized, and reduces the energy consumption; meanwhile, the injection molding process is used, so that the production efficiency is greatly improved; the strong and weak structure improves the pressure on the rubber pipe when the sheath is stressed, thereby improving the friction force between the sheath and the rubber pipe interface and ensuring that the sheath and the rubber pipe are not easy to move relatively; and the whole assembly product is lighter in weight while being environment-friendly.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a front view of the first embodiment.

FIG. 2 is a sectional view of the first embodiment.

Fig. 3 is a front view of the second embodiment.

FIG. 4 is a sectional view of the second embodiment.

Labeled as: 1-rubber tube, 2-sheath 3-groove hole, 4-sleeve body connecting part.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

The first embodiment.

As shown in fig. 1 and 2, a thermoplastic elastomer sheath for a brake pipe comprises a sheath 2 which is sleeved on a rubber hose 1, and the front view of the sheath is oval (the side wall of the sheath is a circular arc surface). Sheath 2 adopts SEBS/EPDM PP's thermoplastic elastomer material preparation, and it has groove hole 3 to open on the lateral wall of sheath 2, groove hole 3 inwards extends to set body connecting portion 4, set body connecting portion 4 cup joints around rubber tube 1, weak structure when groove hole 3 forms 2 atresss of sheath, strong structure when set body connecting portion 4 and the solid part of sheath form 2 atresss of sheath.

Example two.

The present embodiment differs from the first embodiment in that the front view of the jacket 2 is rectangular, i.e., the jacket is cylindrical as a whole.

In both embodiments, the following common structure also exists:

The groove holes 3 are distributed on two sides of the outer side wall of the sheath 2, and the groove holes 3 on the two sides are arranged oppositely. The groove holes 3 are eight in number, and the number of each side is four. The distance between the upper part and the lower part of the groove holes 3 on the same side is 2.5-3.5mm, and the distance between the left part and the right part is 2-3 mm.

The length of the opening of the groove hole 3 is 5.5-6.5mm, and the width of the opening of the groove hole 3 is 3.5-4.5 mm. The thickness of the sleeve connecting part 4 is 2-4 mm. The distance between the upper surface and the lower surface of the sheath 2 is 14-18 mm. The outer diameter of the brake hose is 9.0 mm-10.5 mm.

The sheath adopting the two structures has the working principle that: the invention changes the change of the internal structure when the force is applied by changing the internal structure of the sheath under the condition of not changing the external dimension of the sheath, thereby improving the acting force of the sheath and the rubber tube and reducing or preventing the sliding of the sheath. The structure is characterized in that the combination of the strong and weak structure is realized, the position 2-4mm away from the interface of the sheath and the rubber tube and the solid part are the strong structure, and the hole part is the weak structure; when a force parallel to the direction of the rubber tube acts on the sheath, the deformation of the weak structure part is larger than that of the strong structure part, so that the exterior of the sheath extrudes the interior of the sheath, the pressure of the sheath on the rubber tube is improved, the friction force between the sheath and the rubber tube interface is improved, and the sheath and the rubber tube are not easy to move relatively.

In addition, adopt this patent product to compare with current product, when the stretching speed 25mm/min, draw five times respectively, the required effort of every time tensile slip is:

As can be seen from the above table, the connection stability of the sheath structure is better and the sheath structure is less prone to sliding.

The production process of the sheath comprises the following steps: installing the rubber hose assembly on an injection molding machine according to a designed mold, setting an injection molding process according to requirements, adding the thermoplastic elastomer material subjected to dehumidification treatment from a feeding port, then placing the rubber hose assembly into the mold, starting equipment for injection molding, taking down a finished product after injection molding, and inspecting and warehousing.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution methods fall within the scope of the present invention.

The parts not involved in the present invention are the same as or can be implemented using the prior art.

Claims

1. The utility model provides a brake pipe thermoplastic elastomer sheath, establishes the sheath on the rubber tube including the cover, its characterized in that, the sheath adopts the thermoplastic elastomer material preparation, and it has the recess hole to open on the lateral wall of sheath, the recess hole inwards extends to set body connecting portion, set body connecting portion cup joint around the rubber tube, the recess hole forms the weak structure when the sheath atress, and set body connecting portion and sheath solid part form the strong structure when the sheath atress.

2. The brake tube thermoplastic elastomer boot of claim 1, wherein the groove holes are distributed on both sides of the outer sidewall of the boot, and the groove holes on both sides are disposed opposite to each other.

3. A brake tube thermoplastic elastomer boot according to claim 2, wherein at least two or more groove holes are provided per side.

4. A brake pipe thermoplastic elastomer boot according to claim 2 or 3, wherein the recess holes are provided in a total of eight, four on each side.

5. The brake pipe thermoplastic elastomer boot of claim 4, wherein the recessed holes on the same side are spaced apart 2.5-3.5mm apart and 2-3mm apart.

6. A brake pipe thermoplastic elastomer boot according to claim 1, 2 or 3, wherein the slot opening has a length of 5.5-6.5mm and a width of 3.5-4.5 mm.

7. The brake pipe thermoplastic elastomer sheath of claim 1, wherein the sheath interface has a thickness of 2-4 mm.

8. A brake tube thermoplastic elastomer sheath according to claim 1, wherein the sheath has an upper and lower surface separation of 14-18 mm.

9. A brake tube thermoplastic elastomer sheath according to claim 1, wherein the sheath is made of a mixture of any two of SEBS, EPDM and PP.

10. The brake tube thermoplastic elastomer boot of claim 1, wherein the boot is integrally formed using an injection molding process.