JPS58145556A - Braking compensator controlled by deceleration of car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake compensation device, and more particularly to a brake compensation device controlled by the deceleration of a vehicle.

For example, in U.S. Pat. No. 2,242,297, an inlet hole connected to a master/su/da, an outlet hole connected to at least one orifice, and an outlet hole connected to the artificial hole and the outlet hole are disclosed. a spherical mass inserted into the cavity, and an outlet to the outlet hole; A brake compensator of the type is disclosed which includes a valve seat provided therein, the mass being movable by inertia and capable of seating on the valve seat.

In the device according to US 1 yen F above, the valve seat is disposed on the front wall of the empty space. In this arrangement, the exit hole is necessarily
・Must be placed in front of Ujinobu. As a result,
It is necessary to provide a suitable elbow at the end of the pipe connecting this outlet hole to the rear brake.

Similarly, although it is theoretically possible to provide an inlet hole on the side of the nozzle knob, this is usually done for manufacturing convenience.
It is located at the rear end of No-Ujinobu.

In either case, it is necessary to provide a suitable elbow at the end of the pipe leading from the master cylinder.

In order to alleviate these disadvantages, the invention proposes that in a brake compensator of the type described above, the valve seat is disposed over the inclined surface.

With the above measures, it is possible to install the inlet hole...in front of the maggot knob, and the elbows that must be provided at the end of the pipe leading from the master cylinder can be reduced to a minimum.

Further, according to a preferred embodiment of the present invention, the void space is
An outlet hole is formed inside the insert inserted into the housing, and an outlet hole is arranged behind the nozzle knob, and a space between the outlet hole and the valve seat is formed between the nozzle knob and the insert. Let's communicate through the passage.

In this case, the elbow that must be provided at the end of the pipe leading to the rear brake is also reduced to a minimum.

Further, according to the present invention, it is possible to reduce the unfolded length of the pipes, thereby reducing the weight and contributing to the reduction in the weight of the vehicle.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, the brake system basically includes a master cylinder 10, a front brake 12, and a rear brake 1.
It consists of 4. Connecting pipe 16a for rear brake
, a brake compensation device 18 is interposed in the brake compensation device 16b, and the brake knob 20 of the compensation device 18 is arranged so that its longitudinal axis forms an angle α with respect to the horizontal and rises toward the front of the vehicle. It is fixed to the chassis of the vehicle by appropriate means (not shown).

The housing 20 includes a hole 22 whose rear end is closed by a plug 24 .

An inlet hole 26 is provided at the front end of the housing 20 and an outlet hole 28 is provided at the plug 24, ie at the rear end of the housing.

A cup-shaped insert 30 with a cavity 32 communicating with the inlet hole 26 is disposed inside the hole 22 . The lower part of the cavity 32 has an inclined surface 3 within which a spherical mass or pole 36 can be moved rapidly.
4 is formed.

An annular valve seat 38 is disposed along this inclined surface 34 and at the outlet of a radial passage 40 provided within the insert 30, which passage 40 is formed between the insert 30 and the bore 22 and is located within the insert 30. An axial passage 42 leading to the outlet hole 28 connects the cavity 32.

In the rest state, the ball 36 is in contact with the bottom of the insert 30 by its weight and the valve seat 38 is open. Therefore, the master cylinder 10 and the rear brake 14 include the inlet hole 26, the cavity 32, the passages 40 and 42,
It communicates freely with the path of the exit 28.

During operation, when the vehicle is moving in the direction of arrow F, brake fluid is initially freely communicated to the front brakes 12 and rear brakes 14 when the master/cylinder 10 is actuated.

When the deceleration resulting from braking exceeds a set value, which is a function of said angle α, the ball 36 moves along the inclined surface 34 and seats on the valve seat 38. As a result, communication between the master cylinder 10 and the rear brake 14 is cut off, and the subsequent increase in brake fluid is transmitted only to the front brake 12, and the pressure inside the rear brake 14 is reduced to the level at the moment when the valve seat 38 is closed. equal to the pressure, and locking of the rear wheels is avoided.

Then, the valve seat 38 is blocked by the front brake 12.
As long as the pressure inside exceeds the pressure inside the rear brake 14, this is ensured.

As shown, the plug 24 securely locks the insert 30 within the housing 20.

The insert 30 and housing 20 further include a positioning device consisting of an eccentric frame 44 extending axially from the insert 30 and a receiving bore 46 in the housing 20.

This ensures that the valve seat 38 is correctly located in the lower portion of the cavity 32 during assembly of the device as well as during installation on the vehicle seat.

As explained above, in this device, in particular the connecting pipe 1
6a and 16b, the bending work of these pipes can be minimized, and the total length of the pipes can be shortened.

FIG. 2 shows a second embodiment of the invention, which includes similar elements to the embodiment of FIG. 1, and the same reference numerals have been used for them.

In this device, the hole 22 has a small diameter extension 23 on the same side as the inlet hole 26, in which the extension 31 of the insert 30 is accommodated. That is, the insert aO and its extension 31 form a stepped piston.

Additionally, inserts 30-31 are slidably inserted into holes 22-23 to define three chambers within the housing. That is, the entrance chamber 48 on the same side as the entrance hole 26
, an outlet chamber 50 on the same side as the outlet hole 28, and an intermediate atmospheric chamber 52, the atmospheric chamber 52 being located between two /-rues 54, 56 mounted on the insert 30 and its extension 31, respectively. I'm being forced to do it.

As shown, passages 40 and 42 are connected to seal 54.
It is connected to the outlet chamber 50 at the rear.

In the rest state, the ball 36 does not close the valve seat 38;
There is free communication between the inlet hole 26 and the outlet hole 28.

During operation, when the master cylinder is actuated when the vehicle is moving in the direction of arrow F, brake fluid is initially supplied not only to the front brakes 12 but also to the rear brakes 14.

As a result of braking, when the deceleration exceeds a set value which is a function of the angle α, the ball 3°6 moves along the inclined surface 34 and the valve seat 3
Sit on top of 8.

It should be noted that in this embodiment, the edges of the valve seat 38 are used to form an inclined surface 34 for the ball 36. As a result, communication between the master cylinder 10 and the rear brake V-key 14 is cut off, and the pressure within the rear brake 14 changes as follows. That is, in the intermediate period, this pressure is equal to the pressure in the outlet chamber 50 at the moment when the ball 36 closes the valve seat 38, and the stepped piston 30-3
1 is maintained with its end in contact with the housing 20, and the ratio of the pressure supplied from the master cylinder 10 to the pressure in the outlet chamber 50 is equal to the ratio of the cross-sectional area of the insert 30 and its extension 31. Shi is also small.

At the end of the stage, the stepped piston 30-31 moves into the inlet chamber 48.
Due to the increase in the pressure within the insert 30, it moves toward the outlet chamber 50, and the ratio of the inlet pressure to the outlet pressure is
is equal to the cross-sectional area ratio (less than 1).

For various reasons, if the stepped piston 30
- Even if the end of 31 is not in contact with the housing 20,
As soon as the pressure begins to rise due to actuation of the master cylinders, the pistons 30-31 are moved to the end contact position shown.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a first embodiment of a brake compensation device according to the present invention combined with a brake circuit, and FIG. 2 is a cross-sectional view of a second embodiment of the present invention. IQ@・Master cylinder, 12...Front brake, 14...Rear brake, 18...Braking correction device, 20
... No. Ujifugu, 26.. Inlet hole, 28.. Outlet hole, 30.. Insert, 32.. Hole, 34.. Inclined surface, 36.. Spherical mass, 38.. Valve seat.

Claims (1)

[Claims] 1. An inlet hole (2) connected to a master turn cylinder (10).
6), an outlet hole (28) connected to at least one rear brake (14), and an inclined surface (34) communicating with the inlet hole and the outlet hole and rising toward the front of the vehicle.
a housing (2o) having a cavity (32) in its lower part, a spherical mass (36) inserted into said cavity (32), and provided at the outlet to said outlet hole. A valve seat (38) is provided, and the mass (36) is moved by inertia and is configured to be seated on the valve seat (38), wherein the valve seat (38) is connected to the inclined surface (34).
) A braking correction device for controlling the deceleration of a vehicle. 2. The person hole (26) is connected to the housing (2o).
9. The braking correction device according to claim 1, wherein the braking correction device is disposed at the front end portion of the braking device. 3. The cavity (32) is formed in the insert (30) inserted into the housing (20), and the outlet hole (28)
) is arranged at the rear end of the housing, and the outlet hole (28) and the valve seat (38) are connected to the housing (
(20) and the inserter) (30)
40, 42), the braking correction device according to claim 1 or 2, wherein 4. A device (44, 46) by which the insert (30) and the housing (20) position the former relative to the latter;
The braking correction device according to claim 3, characterized in that it comprises: 5. A patent characterized in that the positioning device comprises an eccentric frame (44) projecting in the axial direction from the inserter (30) and a corresponding hole (46) in the housing (20). A braking correction device according to claim 4. 6. Claims 1 to 6, characterized in that the insert (30) constitutes a stepped piston/(30, 31) slidably inserted into the housing (20). The braking correction device according to any one of item 5.