JPH0326046Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a variable load hydraulic pressure control valve provided in a vehicle such as an automobile.

(Prior art) When braking a vehicle, the center of gravity of the vehicle moves forward, so if the same amount of braking force is applied to the front and rear wheels,
Since the rear wheels are locked first, they are more likely to slip, which is dangerous. In order to avoid this risk, it is necessary to apply braking force to the front and rear wheels that is appropriate for the movement of the center of gravity.

In a braking device using a master cylinder, a hydraulic pressure control valve is connected and provided between the master cylinder and the rear wheel cylinder to control the hydraulic pressure supplied to the wheel cylinder and achieve optimal control of braking force. is being carried out. In addition, in vehicles such as trucks where the load applied to the rear wheels changes greatly between when loaded and unloaded, a variable load hydraulic pressure control valve is connected between the master cylinder and the rear wheel cylinder. The braking force is optimally controlled according to the load applied.

An example of this variable load hydraulic pressure control valve is shown in FIG. 4, which will be briefly described.

One end of a lever 24 is swingably connected to a lever mounting portion 22 of a control valve main body 21 fixed to a vehicle body 20 via a shaft 23. A through hole 25 is formed at the other end of the lever 24, and a displacement member (not shown) on the axle side, such as a suspension arm, which is displaced relative to the vehicle body is attached to the through hole 25. A connecting rod 26 is slidably inserted. A variable load spring 28 is interposed between a spring receiver 27 provided on the connecting rod 26 and the lever 24, and the lever 24 is elastically supported. One end side of the lever 24 is the control valve body 21
The rod 29 is connected to an on-off valve (not shown).
The opening/closing valve is urged in the valve closing direction based on the elastic force of the variable load spring 28.

According to this configuration, the variable load spring 28 is bent according to the amount of relative displacement between the vehicle body 20 and the axle side,
The lever 24 urges the rod 29 of the control valve main body 21 by the elastic force. Then, the opening and closing of the on-off valve is controlled by this biasing force, and the master cylinder hydraulic pressure is adjusted to a control hydraulic pressure according to the load, and is transmitted to the wheel cylinder of the rear wheel.

(Problems to be Solved by the Invention) However, the conventional variable load hydraulic pressure control valve described above has the following problems.

In the variable load hydraulic pressure control valve, the connecting rod 26 is fitted into the through hole 25 of the lever 24, so that the vertical displacement range of the lever 24 and the connecting rod 26 is restricted. For this reason, variable load hydraulic pressure control valves cannot be installed in locations where the relative displacement between the vehicle body and the axle side becomes extremely large when the vehicle jumps while driving or when the vehicle body is jacked up. The mounting position is restricted. For example, when the connecting rod 26 is attached to a suspension arm as a displacement member, the suspension arm is connected near the pivot point where the suspension arm is attached to the vehicle body, that is, at a location where the relative displacement between the vehicle body and the axle side is small. There was a problem in that the mounting position of the rod 26 was restricted and the degree of freedom in the mounting position of the variable load hydraulic pressure control valve was extremely small.

Furthermore, when installed at a location where the amount of relative displacement is small, the control valve body 2
There was also the problem that highly accurate and precise hydraulic pressure control could not be performed because four on-off valves had to be controlled.

The present invention was developed in view of the above problems, and its purpose is to provide a variable load hydraulic pressure control valve that has fewer restrictions on installation position and can control hydraulic pressure with high precision. be.

(Means for Solving the Problems) The variable load hydraulic pressure control valve of the present invention has a lever mounting portion of a hydraulic pressure control valve body fixed to a vehicle body, and a lever having a through hole formed at one end and the other end of the lever. The other end of a connecting rod, which is swingably connected via a shaft and has one end connected to a displacement member on the axle side that is displaced relative to the vehicle body, is loosely inserted into the through hole of the lever.
The connecting rod is elastically supported by the lever via a variable load spring, and either the other end of the lever or the shaft hole of the lever mounting part is formed into a long hole through which the shaft can move freely. That is.

(Function) With the above configuration, the axis for attaching the lever to the lever attachment part can be moved within the long diameter and range of the elongated hole, making it possible to set a large amount of vertical displacement between the lever and the connecting rod. This means that it can be placed in locations where the relative displacement between the vehicle body and the axle side is large.

Furthermore, since the other end of the connecting rod is loosely inserted into the through hole, the gap between the through hole and the connecting rod provides flexibility in the angle formed by the lever and the connecting rod.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

Reference numeral 2 denotes a connecting rod, and one end thereof constitutes a ring portion 3 formed in a ring shape. ) via a mounting member 18 so as to be swingable. A spring receiving portion 4 is formed on the proximal end side of the connecting rod 2 on the ring portion 3 side. The other end of the connecting rod 2 slidably projects through a through hole 6 formed at one end of the lever 5, and is connected to the through hole 6 by a flange 7 formed at the projecting end. It is designed to prevent it from falling off. Further, the other end of the connecting rod 2 is loosely inserted into the through hole 6, as shown in FIG. 2, and a gap is formed between it and the opening of the through hole 6. An annular spring holding part 8 is formed around the through hole 6 in the lever 5, and between the spring holding part 8 and the spring receiving part 4, the lever 5 is moved clockwise in the drawing. A variable load spring 9 made of a coil spring that elastically biases is provided.

A shaft hole 11 into which a shaft 10 is fitted is formed between both ends of the lever 5, and a variable load spring 9 biases the lever 5 clockwise in the figure at the other end of the lever 5. A pressing portion 14 is formed which comes into contact with a rod 13 connected to an on-off valve (not shown) of the control valve main body 12.

The control valve body 12 is provided with a lever attachment part 15 for attaching the other end of the lever 5. The lever attachment part 15 is made of a hook-shaped plate member, and the tip thereof is provided with a lever attachment part 15 for attaching the other end of the lever 5. A long hole 16 extending in the direction of movement of the shaft 10 is formed, and the shaft 10 fitted in the shaft hole 11 is movably inserted into the long hole 16.

Next, variable load hydraulic pressure control valve 1 according to the above configuration.
The effect of this will be explained.

During normal driving, where the relative displacement between the vehicle body 17 and the mounting portion 18 on the axle side is not so large, as shown in FIG. The lever 5 swings about the shaft 10 as a fulcrum, and the swing of the lever 5 is transmitted to the rod 13 via the pressing portion 14. That is, the variable load spring 9 is bent in accordance with the weight of the cargo loaded on the vehicle, and based on the elastic force of the variable load spring 9, the urging force of the lever 5 to press the rod 13 is applied to the connecting rod 2 and the through hole 6. The relative position between the axle 18 and the vehicle body 17 is adjusted by the sliding movement of the connecting rod 2 and the through hole 6.

When the vehicle jumps while traveling or is jacked up during maintenance, the relative displacement between the vehicle body 17 and the axle becomes excessive, and the amount of the relative displacement exceeds the amount that the variable load spring 9 can absorb. At that time, as shown in FIG. 3, the shaft 10 is located at the other end of the elongated hole 16 (lower side in the figure), and the shaft can move downward by the length of the elongated hole 16. Become. At this time, since a gap is provided between the connecting rod 2 and the through hole 6, this gap gives a degree of freedom to the angle formed by the lever 5 and the connecting rod 2 (second
(see figure), the relative position between the axle 18 and the vehicle body 17 is adjusted. Further, the flange portion 7 engages with the opening of the through hole 6 to prevent the connecting rod 2 from falling off. In this way, by making it possible to set a large amount of displacement in the vertical direction between the lever 5 and the connecting rod 2, the position on the axle side to which the connecting rod 2 is attached can be set to a relatively large amount of displacement with respect to the vehicle body 17. It can be set in a large location, and the degree of freedom in the mounting position of the variable load hydraulic pressure control valve 1 can be increased. moreover,
Since the control valve main body 12 can be controlled at locations where the amount of displacement between the vehicle body 17 and the wheel side is large, highly accurate and precise control can be performed.

In addition, in this embodiment, the lever mounting portion 15 has a long hole 1.
6 is formed, but the present invention is not limited to this, and the shaft hole of the lever 5 may be made into a long hole.

(Effects of the invention) As explained in detail above, the present invention forms a long hole in either the lever or the lever mounting part, makes the shaft connecting the lever to this long hole movable, and connects the lever and the connecting part. Since the degree of freedom is given to the angle formed by the rod, it is possible to set a large amount of displacement in the vertical direction by the lever and the connecting rod. Therefore, the mounting position of the connecting rod can be set even in a place where there is a large relative displacement between the vehicle and the axle side, which increases the degree of freedom in the mounting position, and allows hydraulic pressure control to be performed with a large amount of displacement, making it more accurate. This has advantages such as high hydraulic pressure and precise hydraulic pressure control.

[Brief explanation of the drawing]

1 to 3 are views showing an embodiment of the variable load hydraulic pressure control valve of the present invention, FIG. 1 is a schematic view showing the mounting position, and FIG. 2 is a detailed side view of FIG. 1. , FIG. 3 is an explanatory diagram of the operation when the relative displacement between the vehicle body and the axle side is excessive, and FIG. 4 is a diagram illustrating an example of a conventional variable load hydraulic pressure control valve. 1... variable load hydraulic pressure control valve, 5... lever, 7...
...Connecting rod, 9...Elastic body, 10...Shaft, 15...
Lever mounting part.

Claims (1)

[Scope of utility model registration request] The other end of the lever, which has a through hole formed in one end, is swingably connected via a shaft to the lever mounting portion of the hydraulic control valve body fixed to the vehicle body. The other end of the connecting rod, one end of which is connected to the displacement member on the axle side, which is displaced relative to 1. A variable load hydraulic pressure control valve, characterized in that either the end portion or the shaft hole of the lever mounting portion is formed into a long hole through which the shaft is movable.