JPH11208457A - Mounting structure of fluid piping for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a fluid piping for automobile, which can prevent a brake tube from turning together without use of any clamp and can preclude interference with any other component part. SOLUTION: A metal tube 1 and a flexible hose 2 are fastened to each other through a joint 5 of a bracket 4 which is secured to a car body 3. The tube 1 is composed of a coupling part with joint 5 and a part continued to the coupling part, the two parts being folded at a certain angle, and the bracket 4 is integrally furnished with a supporting part 4c to support the folded part of the tube 1, and the supporting part 4c is furnished with an abutting surface 4e to restrict turning together when the tube 1 is going to be fastened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting fluid pipes for automobiles such as brake pipes and fuel pipes.

[0002]

2. Description of the Related Art Conventionally, when a brake pipe is provided on a vehicle body, for example, as shown in Japanese Utility Model Laid-Open Publication No. 57-8158, a flexible brake hose connected to a movable portion (for example, a suspension) of the vehicle body is provided. The metal brake tube provided on the fixed portion is fastened via a bracket fixed to the vehicle body.

FIG. 1 shows an example of a conventional brake pipe.
1 is a metal brake tube and 2 is a rubber brake hose. A joint 5 is provided at one end of the brake hose 2, and the joint 5 is attached to a bracket 4 fixed to the vehicle body 3. The brake tube 1 is fastened to the joint 5 via a flare nut 6. In the brake tube 1, a connecting portion 1 a with the joint 5 and a portion 1 b continuous therewith are bent at an angle.

[0004]

In the case of the above-mentioned piping structure, when the brake tube 1 and the brake hose 2 are fastened, the brake tube 1 is moved by the frictional force between the flare nut 6 and the brake tube 1 as shown in FIG. As shown in (C), they may co-rotate in the tightening direction, do not follow the design piping route, and cause interference between the bent portion 1b and the other component 7 in some cases.

Conventionally, the bent portion 1b of the brake tube 1 is fixed to the vehicle body 3 by clamps 8a and 8b to prevent interference between the brake tube 1 and other components 7. However, depending on the shape of the vehicle body, the clamp 8a may not be disposed near the flare nut 6, so that the brake tube 1 between the flare nut 6 and the clamp 8b may bend and interfere with other components 7. Was. Also, by using a plurality of clamps 8a and 8b,
There is also a problem that the number of parts and the number of work steps are increased, and the cost is increased.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a mounting structure for a fluid pipe for an automobile which has excellent positioning accuracy of a brake tube, can prevent co-rotation of the brake tube without using a clamp, and can prevent interference with other parts. Is to do.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a fluid pipe for automobiles in which a metal tube and a flexible hose are fastened via a joint of a bracket fixed to a vehicle body. The tube has a joint with a joint and a part continuous with the joint bent at an angle, and the bracket is integrally formed with a support for supporting the bent part of the tube. It is characterized in that a contact surface for restricting co-rotation when the tube is tightened is formed.

When the metal tube is to be fastened to the joint of the bracket, the tube tends to rotate together due to the frictional force at the time of fastening. However, since this co-rotation is restricted by the contact surface provided on the support portion of the bracket, it is possible to prevent the tube from interfering with other components.

[0009]

2 to 5 show an example of a brake pipe mounting structure to which the present invention is applied. In these figures, the same parts as those in FIG. As shown in FIG. 4, the bracket 4 includes a horizontal fixing portion 4a fixed to the vehicle body 3, a mounting portion 4b that stands vertically from the fixing portion 4a, and a side protruding from the mounting portion 4b.
And a support part 4c bent substantially at a right angle. The brake tube 1 and the brake hose 2 are fastened to the mounting portion 4b via a joint 5 provided at one end of the brake hose 2. That is, as shown in FIG. 5, the joint 5 is fitted and fixed in a hole of the mounting portion 4b, and a flare portion 1c is formed at the tip of the connection portion 1a of the brake tube 1, and this flare portion 1c is connected to the flare nut. The brake tube 1 is fastened to the joint 5 by being press-fitted to the tapered portion 5 a of the joint 5 by 6. In this embodiment, a female-type flare fitting is shown, but a male-type flare fitting may be used.

A U-shaped groove 4d opening laterally is formed at the tip of the support portion 4c, and the bent portion 1b of the brake tube 1 is inserted and supported in the groove 4d. The upper side surface of the groove 4d serves as a contact surface 4e that regulates co-rotation when the brake tube 1 is tightened. A tube protector 9 made of rubber or the like is mounted on the bent portion 1b of the brake tube 1 in order to prevent metal contact with the bracket 4.

In the above-described piping structure, when the flare nut 6 is tightened, the friction force between the flare nut 6 and the flare portion 1c of the brake tube 1 causes the brake tube 1 to rotate together. In particular, the bent portion 1b bent at an angle with respect to the connecting portion 1a may rotate and interfere with other components. However, since rotation of the bent portion 1b of the brake tube 1 is restricted by the contact surface 4e of the bracket 4, it is possible to reliably prevent the bent portion 1b from interfering with other components. Even if the bent portion 1b of the brake tube 1 swings up and down due to the vibration of the vehicle body or the like, the brake tube 1 is moved through the groove 4 through the protector 9.
Since it is held at d, generation of abnormal noise and wear can be prevented.

The present invention is not limited to the above embodiment, but can be modified without departing from the spirit of the present invention. For example, in the above embodiment, the U-shaped groove 4 is formed in the support portion 4c.
d, and the upper side surface is the contact surface 4e. However, as shown in FIG. 6, an L-shaped notch 4f of the support portion 4c is provided, and the upper surface (the surface in the co-rotation direction) is the contact surface 4g. Is also good.

When the bent portion 1b of the brake tube 1 has a bent angle of less than 90 ° with respect to the connecting portion 1a as shown in FIG. It is desirable to bend at least °. In addition,
The present invention is applicable not only to a brake pipe but also to a fuel pipe.

[0014]

As is apparent from the above description, according to the present invention, a support portion for supporting a bent portion of a tube is formed integrally with a bracket, and the support portion rotates together with the tube when the tube is fastened. Is formed, so that even if the tubes try to rotate together due to the frictional force at the time of fastening, the contact surface provided on the support part of the bracket regulates this co-rotation, preventing the tube from interfering with other parts. Can be prevented. Further, even when the clamp cannot be arranged near the flare nut, by providing the support portion integrally with the bracket, the tube can be reliably positioned, so that the mounting error can be eliminated. In addition, according to the present invention, it is not necessary to arrange another fixture such as a clamp near the bracket, so that the number of parts and the number of working steps can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 shows a conventional brake pipe mounting structure, and FIG.
Is a plan view, (B) is a front view, and (C) is a left side view.

FIG. 2 is a plan view showing a brake pipe mounting structure according to one embodiment of the present invention.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a perspective view of a bracket.

FIG. 5 is an enlarged sectional view of a flare pipe joint portion.

FIG. 6 is a partial view of a second embodiment of the present invention.

FIG. 7 is a plan view of a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brake tube 1a Connecting part 1b Bent part 2 Brake hose 4 Bracket 4b Mounting part 4c Support part 4d Groove 4e Contact surface 5 Joint 6 Flare nut

Claims (1)

[Claims] 1. A fluid pipe for automobiles comprising a metal tube and a flexible hose fastened via a joint of a bracket fixed to a vehicle body, wherein the tube is connected to a joint with the joint and a portion continuous with the joint. Are bent at an angle, and the bracket is integrally formed with a support portion for supporting the bent portion of the tube, and the support portion has a contact surface that regulates co-rotation when the tube is tightened. An automotive fluid piping mounting structure characterized by being formed.