JPH0247093Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a variable load hydraulic pressure control valve provided in a brake device of an automobile or the like.

[Conventional technology]

When braking a car, most of the inertia load of the car body due to deceleration is transferred to the front wheels, so if the same braking force is applied, the rear wheels will lock up first, which is dangerous. Therefore, in the case of a brake system using a master cylinder, a hydraulic pressure control valve is provided between the master cylinder and the rear brake cylinder to appropriately control the hydraulic pressure supplied to the rear brake cylinder to prevent locking. is planned. Furthermore, in vehicles such as trucks in which the payload changes greatly, a variable load hydraulic pressure control valve is provided that can appropriately control the hydraulic pressure supplied to the rear brake cylinders in accordance with the payload.

FIG. 4 shows an example of the structure of the variable load hydraulic pressure control valve. In the figure, 1 is the main body,
Reference numeral 2 denotes a lever rotatably attached to the main body 1 with a pin 3. The main body 1 has an inlet 5 for receiving oil from the master cylinder and an outlet 4 for supplying the oil to the brake cylinder, and a cylinder that communicates the inlet 5 and the outlet 4 inside. It has a section 6. A piston 7 serving as a flow rate control valve is slidably housed in the cylinder portion 6, and a liquid passage 7a communicating the inflow port 5 and the outflow port 4 is formed in this piston 7.

This piston 7 is always urged to the left by a spring 9 seated on a plug 8 screwed onto the main body 1 so as to close the cylinder portion 6. Further, a valve seat 10 is integrally provided at the tip of the piston 7 by caulking, and a valve body 11 is further disposed at the bottom of the cylinder portion 6 for seating and separating from the valve seat 10 to open and close the liquid passage 7a. It is set up. The valve body 11 is always biased to the left (valve closing direction) by a spring 12. On the other hand, the lever 2 is provided with a rod 13 that passes through the plug 8 and extends toward the piston 7.

As shown in FIG. 5, such a variable load hydraulic pressure control valve normally has a main body 1 fixed to a vehicle body 14, a lever 2 and one end rotatably attached to the vehicle body 14 by a shaft 14a, and the other end is rotatably attached to the vehicle body 14. A hydraulic pressure control spring (coil spring) 18 is stretched between the link 17 supported by the axle 16 of the wheel 15, and the valve opening direction determined by the hydraulic control spring 18 is normally applied to the lever 2 (the rod 13 moves the piston 7 It is installed and used so as to apply a biasing force in the direction of pressing the object to the left. As a result, the piston 7 is always positioned to the left by receiving a pressing force from the spring 9 and from the hydraulic pressure control spring 18 via the rod 13, and as a result, the valve body 11 is moved against the piston 7 by the valve seat 10. The flow of oil from the master cylinder to the brake cylinder is guaranteed.

When the hydraulic pressure is supplied from the master cylinder to the brake cylinder due to brake operation and the hydraulic pressure gradually increases, the force that moves the piston 7 in the valve closing direction due to the difference in the pressure receiving area of the piston 7 increases, and finally The valve body 11 and the valve seat 1 move against the biasing force of the hydraulic pressure control spring 18.
0 is seated and the liquid passage 7a is closed, and then,
As the valve body 11 and the valve seat 10 repeatedly move in and out of position, the hydraulic pressure supplied to the brake cylinder is reduced at a constant rate. Further, the link 17 rotates according to the load of the vehicle, and the larger the load is, the greater the force with which the hydraulic pressure control spring 18 biases the piston 7, and the hydraulic pressure when the liquid passage 7a is closed increases. This makes it possible to obtain appropriate braking force according to the load.

[The problem that the idea attempts to solve]

However, in order to ensure accurate operation of this type of variable load hydraulic pressure control valve, fluctuations in the link 17 must be accurately transmitted to the lever 2. However, in the conventional installation mode as shown in FIG. There was a problem in that the fluctuations in the brake force were trigonometrically reduced and transmitted to the lever 2, resulting in poor controllability of the braking force.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a mounting structure for a variable load hydraulic pressure control valve with excellent controllability of braking force.

[Means to solve the problem]

The present invention provides a hydraulic pressure control spring between a lever that is pivoted to the main body of a variable load hydraulic pressure control valve that is fixed to the vehicle body, and a link that has one end pivoted to the vehicle body and the other end supported by the axle. A variable load hydraulic pressure control valve mounting structure for applying a biasing force that follows changes in the vehicle body to the lever via the hydraulic pressure control spring, wherein the variable load hydraulic pressure control valve is provided with a pressure control valve that is substantially orthogonal to the rotation plane of the link, and A bracket having a mounting surface located on the side of the link is fixedly installed, and a circular motion tangent of the mounting portion of the hydraulic pressure control spring in the lever and the mounting surface of the hydraulic pressure control spring in the link are connected to the mounting surface of the bracket. It is characterized in that the main body of the variable load hydraulic pressure control valve is mounted so that the tangents of the circular motion of the parts coincide with each other.

[Effect]

The main body of the variable load hydraulic pressure control valve was installed so that the tangent of circular motion of the mounting part of the hydraulic pressure control spring on the lever coincided with the tangent of circular motion of the mounting part of the hydraulic pressure control spring on the link. Fluctuations can also be transmitted with high sensitivity as lever movements, improving controllability of braking force.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show the mounting structure of the variable load hydraulic pressure control valve according to the present invention. In these figures, the same components as those shown in FIGS. 4 and 5 are designated by the same reference numerals, and their explanations will be omitted. In Figures 1 to 3,
Reference numeral 21 denotes a bracket fixed to the vehicle body 14, and the bracket 21 has a mounting surface (between the shaft 14a and the axle 16 in FIG. A surface (22) perpendicular to the plane of the paper is formed between them. The variable load hydraulic pressure control valve 20 is attached to this mounting surface 22 with two bolts (including nuts) 23 and 24, while a support member 25 is provided on the link 17 to protrude laterally. A hydraulic pressure control spring 18 is stretched between this support member 25 and the lever 2 of the variable load hydraulic pressure control valve 20.

More specifically, one bolt 23 serves as an axis for mutual rotation of the main body 1 and the lever 2, and is aligned with a line B that is perpendicular to the tensioning direction A of the hydraulic control spring 18.
It is installed at the top. The other bolt 24 is for positioning the main body 1 with respect to the lever 2, and is attached to a long hole 26 provided on a circular orbit centered on the one bolt 23. That is, if the lever 2 including the main body 1 is mounted on the mounting surface 22 of the bracket 21 with the hydraulic pressure control spring 18 tensioned, the circular motion tangent C of the mounting portion of the hydraulic pressure control spring 18 of the lever 2 and the support member 25, that is, the circular motion tangent of the attachment part of the hydraulic control spring 18 of the link 17 can be made to almost match, and if the main body 1 is rotated using one bolt 23 as a fulcrum and the bolt 24 is fixed in the elongated hole 26, , the tip of the rod 13 can be brought into contact with the piston 7.

With this configuration, in order to attach the variable load hydraulic pressure control valve 20 to the vehicle body 14, the hydraulic pressure control spring 18 is bridged between the lever 2 and the support member 25 in advance, and the support member 25 is first installed. In addition to being fixed to the link, the lever 2 including the main body 1 is attached to the mounting surface 22 of the bracket 21 with bolts 23. At this time, the bolt 23 is fixed to the bracket 21, but the mutual rotation of the main body 1 and lever 2 is guaranteed. Next, the main body 1 is rotated around the bolt 23 to tension the hydraulic pressure control spring 18, and the rod 13 is brought into contact with the piston 7, and the bolt 24 is fixed in the elongated hole 28 at that position. The installation work is complete and can be done extremely easily.

Therefore, in the above-mentioned installed state, the circular motion tangent C of the mounting portion of the hydraulic pressure control spring 18 of the lever 2 can be made to substantially match the circular motion tangent of the mounting portion of the hydraulic pressure control spring 18 of the link 17, and this This makes it possible to directly transmit the fluctuation of the link 17 to the lever 2.

[Effect of idea]

As explained above in detail, the present invention has a bracket fixed to the vehicle body having a mounting surface substantially orthogonal to the rotation plane of the link, and a circular motion tangent of the mounting portion of the hydraulic pressure control spring on the lever and the link on the link. The main body of the variable load hydraulic pressure control valve is mounted so that the tangent of circular motion of the mounting part of the hydraulic pressure control spring coincides with that of the hydraulic pressure control spring, making it possible to transmit link fluctuations to the lever with high sensitivity, resulting in variable load hydraulic pressure control. This has the effect of improving the brake controllability of the valve.

[Brief explanation of drawings]

Figures 1 to 3 show the mounting structure of the variable load hydraulic pressure control valve according to the present invention. Figure 1 is a plan view, Figure 2 is a side view, and Figure 3 is a second view. 4 is a sectional view showing the structure of a variable load hydraulic pressure control valve, and FIG. 5 is a schematic diagram showing the mounting structure of a conventional variable load hydraulic pressure control valve. 1...Body, 2...Lever, 14...Vehicle body, 1
6... Axle, 17... Link, 18... Hydraulic pressure control spring, 21... Bracket, 22... Mounting surface.

Claims (1)

[Claim for Utility Model Registration] A lever that is pivoted to the main body of a variable load hydraulic pressure control valve fixed to the vehicle body and a link that has one end pivoted to the vehicle body and the other end supported by the axle are In the mounting structure of the variable load hydraulic pressure control valve, which is provided with a pressure control spring and applies a biasing force that follows changes in the vehicle body to the lever via the hydraulic pressure control spring, A bracket having a mounting surface that is substantially perpendicular and located on the side of the link is fixed, and a circular motion tangent of the mounting portion of the hydraulic pressure control spring in the lever and the hydraulic pressure in the link are connected to the mounting surface of the bracket. 1. A mounting structure for a variable load hydraulic pressure control valve, characterized in that the main body of the variable load hydraulic pressure control valve is mounted so that a tangent of circular motion of a mounting portion of a control spring coincides with the main body of the variable load hydraulic pressure control valve.