JPH0317074Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an air venting device for a hydraulic pipe system in a brake device equipped with a hydraulic cylinder.

[Conventional technology]

In a brake device equipped with a hydraulic cylinder, if an air pocket occurs in the hydraulic pipe, a delay in braking or a lack of braking pressure will occur, so each brake is equipped with an air purge device.

Conventional air venting devices have a plug installed at the upper edge of the master cylinder or wheel cylinder or at the highest position of the hydraulic pipe, and by loosening the plug, the hydraulic oil in the hydraulic pipe spills out, and at the same time, the air in the hydraulic pipe is removed. It is configured to extract. For example, as shown in FIGS. 3 and 4, a guide hole is formed in the wheel cylinder 2 provided near one outer peripheral edge of the drum of the drum brake 1,
A bleeder 3 is installed at the side end of the wheel cylinder 2.
and a cap 4 are provided. The mounting surface of the bleeder 3 is located exactly on the bottom surface of the brake cover 5, and the cap edge is located within the open end surface of the brake cover 5.

[The problem that the idea aims to solve]

In drum brakes for vehicles, there is a tendency to increase the width of the brake shoe in order to increase the braking force and at the same time improve the wear resistance of the pads. For this reason, up until now the installation space was small and it was difficult to bleed air from the bleeder, but if the width of the brake shoe was increased in addition, a problem arose where it was difficult to work with the bleeder in direct contact with the hand. That's what I did. In this case, the problem is that the structure of the vehicle drum brake cannot be changed.

[Means to solve the problem]

This invention was made in view of the above-mentioned problems of the conventional example, and the purpose is to provide a brake air bleed device configured so that air bleed work can be easily performed with the addition of a minimum number of auxiliary devices. That is.

In other words, in a drum brake, a seat body, a flare nut, and a metal material or a part formed of a metal material that can be easily bent are installed in the mounting hole of the bleeder formed on the side end surface of the wheel cylinder for expanding the inside of the brake shoe. A pipe-shaped air pipe with flared ends is fixed airtightly, the other open end of the air pipe is airtightly fixed to a fixed base with a seat body and a flare nut, and the fixed base is fixed at an arbitrary position. , the bleeder is formed to be fixed to the fixed base.

[Effect]

The air supply pipe is screwed directly onto the master cylinder body, and the air vent is bent and extended to the outside of the master cylinder, so that the mixture of gas from the hydraulic pressure pipe and overflowing hydraulic oil is spouted out at a suitable location. can be accommodated in

〔Example〕

Examples will be described with reference to the drawings.

In FIG. 1, the bleeder 3 is a vent pipe 8 which has one edge fixed to the open end of an air vent 7 formed in the main body 6 of the wheel brake 2, and which is bent into a predetermined shape. The fixed position is moved and fixed to a fixed base 9 fixed to the other end of the ventilation pipe 8. The ventilation pipe 8 is formed into a pipe shape,
It is formed of an integral metal pipe such as a copper pipe, a flexible material such as a lead pipe, a steel pipe or a synthetic resin pipe formed with a bendable part, or a copper pipe.

Further, when the ventilation pipe 8 is made of an integral rigid metal, the mounting position is determined in advance and the vent pipe 8 is formed into a predetermined shape. In addition, for those with flexible parts, determine the approximate mounting position,
Make it into a predetermined shape in advance. Also, both ends of the ventilation pipe 8 have flared portions 1 that extend the opening edge outward in the radial direction.
0 is provided and formed. The flared portion 10 may be formed by simply pushing out the edge of the opening, but as shown in FIG. Form. The seat surface 11 is formed so that the wall thickness is double, and the flared outer edge of the flared portion 10 is formed as an arcuate bent edge. As shown in FIG. 6, the ventilation pipe 8 is provided with a seat body 12 formed in a button head shape and in contact with the seat surface 11 of the flared portion 10, and the seat body 12 is inserted into the opening of the guide hole 7 in the wheel cylinder 2. one end is fixed to the mounting hole of the bleeder 3 in the conventional example using the seat body 12 and the flare nut 13. The other end has a seat 12 and a flare nut 13 on one surface of a fixed base 9 formed into a square or rectangular block.
Fix it with. Further, the bleeder 15 is fixed to one surface of the fixed base 9 and is formed so as to communicate with the ventilation pipe 8. Also, the head end 16 of the breeder 3
A cap 4 is provided. Further, the fixed base 9 is formed with a screw hole for mounting, and is screwed to a location where air venting can be easily performed.

〔effect〕

Since this invention is constructed as explained above, it produces the following effects.

Since the vent pipe is flared, it can be rotated in any direction and fixed. Further, since the fixed base can be fixed at any position, it becomes possible to easily process the extracted air mixed with the air current. Furthermore, since the bleeder itself is fixed at a position with a wide range of workability, air purge work is also facilitated.

Furthermore, by replenishing the flare nut with seat and the vent pipe, it is possible to provide a brake air bleed device that can be easily installed on existing vehicles.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a partially removed brake equipped with an air vent device according to this invention, Fig. 2 is a front view thereof, and Fig. 3 is a partially removed brake showing a conventional example. FIG. 4 is an explanatory diagram of a conventional air venting device, FIG. 5 is a cross-sectional diagram with a part of the ventilation pipe removed, and FIG. 6 is an explanatory diagram with a part of the flare joint removed. FIG. 7 is an explanatory cross-sectional view of the fixed base. 1...Drum brake, 2...Wheel cylinder, 3...Bleeder, 8...Vent pipe, 9...
Fixed base.

Claims (1)

[Scope of utility model registration request] A vent pipe 8 formed in a flared portion 10 with a seat body 12 and a flare nut 13 and having one end fixed to the mounting hole of a bleeder 3 formed on the side end face of a wheel cylinder 2 for expanding the inside of the brake shoe in the drum brake 1. , the other end of the ventilation pipe 8 is fixed to one surface by the seat body 12 and the flare nut 13, and the bleeder 3 is fixed to the other surface.
A brake air venting device characterized in that a block-shaped fixed base 9 is provided, and the fixed base 9 is fixed at an arbitrary position.