JP2001180478A - Installation structure of brake vacuum hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the installation structure of a brake vacuum hose for a vehicle. SOLUTION: Legs 10b and 10c coming on contact with a folded-up part 1a of a dash panel 1 are provided on a vacuum hose bracket 10, and a brake booster 4 at the front of the dash panel 1 and a brake pedal bracket at the rear of the dash panel 1 are supported by stud bolts 12 projected from the brake pedal bracket and nuts 14 screwed onto the stud bolts 12. Even if a rotating force acts on the vacuum hose bracket 10 about the stud bolts 12 at the time of installation, the force is received by the legs 10c provided on the vacuum hose bracket 10 coming in contact with the folded-up part 1a of the dash panel 1, thus preventing the rotation. Even if the self-weight of the vacuum hose bracket 10 acts on the brake vacuum hose and a rotating force is generated by a vibration given during running, the rotating force is supported by the legs 10b, thus preventing the rotation of the hose.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake vacuum hose mounting structure applied to an automobile.

[0002]

2. Description of the Related Art A brake booster used for reducing a driver's depressing force on a brake pedal uses an intake negative pressure generated in an intake manifold of an engine. Therefore, the negative pressure chamber of the booster body and the intake manifold are connected by a vacuum hose.
The vacuum hose is laid out so that it does not come into contact with other parts due to vibration of the engine or vibration received during traveling. Therefore, when the hose is long or when the clearance with other parts is not sufficient, a vacuum hose bracket or the like is additionally provided at an intermediate portion of the vacuum hose.

In the vacuum hose bracket used in this manner, a hole is made in a dash panel and a welding nut is added and fixed by bolting, or a stud bolt is welded to the dash panel and fixed by a nut. However, when tightening the bolts and nuts to secure the bracket, prevent the bracket from rotating with the tightening torque.
It is necessary to fix in place or to provide a detent with a suitable structure.

Drilling a hole in the dash panel causes noise to enter the vehicle interior from the engine room side, and sometimes water splashed by the front wheels during traveling may enter the vehicle interior through the hole. . In addition, it is necessary to change the positions of the welding nuts and stud bolts due to the difference between a right-hand drive vehicle in Japan and a left-hand drive in foreign specifications. Therefore, a dedicated dash panel is prepared and selected, or a common dash panel is shared and an unnecessary hole is closed with a closing component. Further, there is a problem that it is difficult to secure a space for providing the fastening and the rotation stop on the dash panel.

[0005] As a prior art relating to a mounting structure of a brake vacuum hose, there is one disclosed in Japanese Patent Application Laid-Open No. 6-87431. This relates to a structure in which a check valve is inserted into an end of a brake vacuum hose, and does not solve the above-described problem of the related art.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and has been made to solve the above-mentioned problem with a simple structure.

[0007]

According to the present invention, as a means for solving the above problems, the invention described in claim 1 is provided.
At the top of the dash panel there is a folded part facing forward,
A brake booster is mounted below the folded portion on the front of the dash panel, a brake pedal bracket is mounted on the back of the dash panel, the brake booster is connected to an intake system of an engine by a brake vacuum hose, and the brake vacuum hose is connected to the dash panel. In a mounting structure of a brake vacuum hose supported by a vacuum hose bracket mounted on a panel, a leg is provided on the vacuum hose bracket so as to be in contact with a folded portion of the dash panel.

According to a second aspect of the present invention, in the first aspect, the vacuum hose bracket on the front face of the dash panel and the brake pedal bracket on the rear face of the dash panel are projected from the brake pedal bracket. The stud bolt and a nut screwed to the stud bolt are jointly supported on the dash panel and supported.

According to a third aspect of the present invention, in the first or second aspect, two legs are provided at intervals with the bent portions of the dash panel of the vacuum hose bracket. The stud bolt is disposed between the two legs, and when the vacuum hose bracket is rotated around the stud bolt, one of the two legs comes into contact with the folded portion. It is characterized by the following.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a holding portion for the brake vacuum hose is formed at one end of the vacuum hose bracket and the other end is provided with the brake vacuum hose. It is characterized in that holes for passing stud bolts are provided.

According to a fifth aspect of the present invention, in the fourth aspect, the holding portion of the brake vacuum hose is formed in an arc shape matching the outer diameter of the brake vacuum hose. Features.

With such a configuration, the legs provided on the vacuum hose bracket are brought into contact with the folded portion of the dash panel, so that the legs can be rotated by vibration during assembly and during vehicle running without providing a separate detent structure. Can be prevented.

[0013]

Embodiments of the present invention will be described below. 1 to 3, reference numeral 1 denotes a dash panel, which defines an engine room 2 and a vehicle compartment 3 (see FIG. 3). On the upper part of the dash panel 1, there is provided a folded portion 1a directed forward of the vehicle body. And
A brake booster 4 is attached to the dash panel 1 below the folded portion 1a. 4a is a reservoir tank, 4
b is a brake pipe, and 4c in FIG. 3 is a clamp. A brake pedal bracket 5 is attached to the back of the dash panel 1 (see FIG. 3). A surge tank 6 is disposed diagonally forward of the brake booster 4. The surge tank 6 is connected to an engine 8 via an intake manifold 7. Reference numeral 9 in FIG. 2 denotes an exhaust manifold.

Above the dash panel 1, there is a vacuum hose bracket 10 according to the present invention, and a brake vacuum hose 11 for connecting the brake booster 4 and the surge tank 6 is supported. To attach the vacuum hose bracket 10 to the dash panel 1, a stud bolt 12 is provided on the brake pedal bracket 5, penetrates the dash panel 1, and a nut is attached to the stud bolt 12 via a washer 13 as shown in FIG. 1
4 is screwed together. That is, the brake pedal bracket 5 and the vacuum hose bracket 10 are fixed to the dash panel 1 by fastening one stud bolt 12 and a nut 14 together.

As shown in FIG. 3, the upper end of a brake pedal 16 is mounted on the brake pedal bracket 5 by a shaft 15. A clevis 18 of a push rod 17 of the brake booster 4 is attached to a part of the brake pedal 16.
Are mounted on a shaft 19.

Although the details of the vacuum hose bracket 10 will be described later, the vacuum hose bracket 10 is manufactured by press-forming a metal plate.
Hole 1 for passing stud bolt 12 through one end of base 10f
0a is provided (see FIG. 5), and legs 10b and 10c which are in contact with the folded portion 1a of the dash panel 1 are provided at two upper positions. One of the two legs 10
b is slightly to the right of the stud bolt 12 when the vacuum hose bracket 10 is viewed from the front, and the other leg 10c
Are provided at a distance from this, and are provided near approximately half of the entire length of the base 10f of the vacuum hose bracket 10.

The leg 10b of the two legs 10b, 10c is attached to the vacuum hose bracket 10 at the time of assembly.
When turning counterclockwise due to its own weight acting on the leg, it comes into contact with and prevents the folded portion 1a, and the leg 10c tightens the nut 14 for fastening the vacuum hose bracket 10 and the brake pedal bracket 5 together. In contact with the folded portion 1a, the vacuum hose bracket 10 acts to prevent the vacuum hose bracket 10 from rotating together with the nut 14.

On the opposite side of the vacuum hose bracket 10 from where the stud bolt 12 is passed, a holding portion 10d of the brake vacuum hose 11 is formed.
The holding portion 10 d is formed in an arc shape matching the outer diameter of the brake vacuum hose 11. The opening serving as the end of the arc-shaped portion is set slightly smaller than the diameter of the brake vacuum hose 11. By doing so, the brake vacuum hose 11 generally made of rubber or the like can be reliably held.
10e is a bead for reinforcement.

FIG. 5 is a front view of the vacuum hose bracket 10, FIG. 6 is a plan view, and FIG. 7 is a side view. As is apparent from these figures, the vacuum hose bracket 10 has a base 10f provided with two legs 10b and 10c which is substantially straight.
c has a shape that is bent at a substantially right angle from the left side. The holding portion 10d of the brake vacuum hose 11 is located at the tip of the bent portion.

[0020]

The present invention is a mounting structure for a brake vacuum hose constructed as described above. According to the first aspect of the present invention, a stud bolt is attached to a vacuum hose bracket at the time of mounting. Even if a turning force acts, the turning can be prevented because the leg provided on the vacuum hose bracket is received in contact with the folded portion of the dash panel. Further, even when the nut is not fastened at the time of assembling, rotation due to its own weight acting on the vacuum hose bracket can be prevented.

According to the second aspect of the present invention,
In addition to the effect of the first aspect of the present invention, a dedicated stud bolt for attaching the vacuum hose bracket is not required. And in the vacuum hose bracket mounting part, the rigidity of the dash panel increases because the brake pedal bracket is mounted on the back of the dash panel,
The transmission of the vibration of the brake vacuum hose to the vehicle body can be suppressed.

According to the third aspect of the present invention,
In addition to the effects of the first aspect, the two spaced legs function to prevent the vacuum hose bracket from rotating in any direction. By providing two legs, erroneous assembly can be prevented.

According to the fourth and fifth aspects of the present invention, in addition to the effects of the first aspect, the brake vacuum hose can be securely clamped without damaging the hose. In addition, the assemblability can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1 viewed from the engine side.

FIG. 3 is a side view of FIG. 1 viewed from the side, with a structure on the vehicle interior side added thereto.

FIG. 4 is an enlarged perspective view showing a main part of FIG. 1;

FIG. 5 is a front view of a vacuum hose bracket.

FIG. 6 is a plan view of that of FIG. 5;

FIG. 7 is a side view of that of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dash panel 1a Folding part 4 Brake booster 5 Brake pedal bracket 10 Vacuum hose bracket 10a Hole 10b Leg 10c Leg 10d Clamping part 11 Brake vacuum hose 12 Stud bolt 14 Nut

Claims (5)

[Claims] A fold-back portion provided on an upper portion of a dash panel, a brake booster is mounted below the fold portion on a front surface of the dash panel, and a brake pedal bracket is mounted on a back surface of the dash panel; In the brake vacuum hose mounting structure in which the intake system is connected to a brake vacuum hose and the brake vacuum hose is supported by a vacuum hose bracket mounted on the dash panel, the vacuum hose bracket is connected to the turn-back portion of the dash panel. A mounting structure for a brake vacuum hose, which is provided with legs to contact. 2. A vacuum hose bracket on the front of the dash panel and a brake pedal bracket on the back of the dash panel are connected to the dash panel with stud bolts protruding from the brake pedal bracket and nuts screwed to the stud bolts. The mounting structure for a brake vacuum hose according to claim 1, wherein the mounting structure is tightened and supported. 3. The leg of the vacuum hose bracket, which is in contact with the folded portion of the dash panel, is spaced apart by two.
And the stud bolt is arranged between the two legs, and when the vacuum hose bracket is rotated around the stud bolt as a rotation center, one of the two legs is attached to the folded portion. 3. The mounting structure for a brake vacuum hose according to claim 1, wherein the mounting structure is adapted to abut. 4. The vacuum hose bracket according to claim 1, wherein one end of the vacuum hose bracket has a holding portion for the brake vacuum hose, and the other end has a hole for passing the stud bolt. Brake vacuum hose mounting structure. 5. The mounting structure for a brake vacuum hose according to claim 4, wherein the holding portion of the brake vacuum hose is formed in an arc shape matching the outer diameter of the brake vacuum hose.