JPS6053453A - 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 (1) Industrial Field of Application The present invention is intended for use in applications where, under certain operating conditions, the brake pressure applied to several brake actuators of a vehicle is dependent on the load of the vehicle. The present invention relates to a vehicle equipped with a load-sensing brake pressure control device.

(2) Prior Art Many load-sensing brake pressure control valves have been developed in the past. For example, British Patent No. 1172LO1.

Same No. 1182841, Same No. 1229422, Same No. 1
No. 252004 or No. 1265159.

The most common equipment for sensing the load on a vehicle is:

The vehicle chassis member f utilizes an elongated spring having a coil portion extending from a rigidly mounted control valve to a coupling member attached to the vehicle. Such a device is shown in Figure 1 of British Patent No. 1,182,841. This device engages both ends of the spring.
It is necessary to fix the S material π, and it is also necessary to provide a complicated adjustment slide.

This makes such prior art devices relatively complex and expensive, making them suitable for use in rear trunk brakes.

Another type of load-sensing spring system is Aida's 11th.
No. 72101, Figures 3 through 9.

However, for these devices.

There is no explanation regarding spring preload or adjustment of spring rate. The device of British Patent No. 1,172,101 therefore requires tight tolerances when initially manufactured, and also suffers from changes in operability as components wear out and cannot be compensated for. will have the following.

(3) Problems to be Solved by the Invention The present invention aims to solve the above-mentioned drawbacks of the prior art.

(4) Means for Solving the Problems According to the present inventor, there is provided a suspension arm which is pivotally mounted on the main body of a π vehicle so as to be pivotable around a pivot axis.

a suspension arm whose position relative to the vehicle body depends on the vehicle load; a brake pressure control valve having a control side and positioned away from the pivot shaft; a brake pressure control valve, the control member being adapted to determine a characteristic of the brake pressure control valve by an external force exerted on the control member; A spring designed to add a coil part.

a first arm extending away from one end of the coil section; and a second arm extending away from the other end of the coil section.
In a vehicle with arms and arms;
The coil portion is mounted on a spindle coaxial with the pivot, and the first arm is in contact with the control member,
The second arm abuts a stop located on the suspension arm at a distance from the pivot, the stop and/or the brake pressure control.

A vehicle is provided which is movable to adjust the preload and spring rate of the spring.

(5) Effect In the present invention, by moving the brake pressure control valve or the stopper in a direction perpendicular to the first arm or the second arm of the spring, respectively, the degree of twist of the coil portion of the spring changes;
Therefore, the preload of the spring can be adjusted to an appropriate value.

Moreover, if the brake pressure control j [or the stopper is moved parallel to the longitudinal direction of the first arm or the second arm of the spring, respectively, the length of the moment arm from the pivot axis changes,
Therefore, the spring rate can be adjusted to an appropriate value.

(6) Embodiment What is shown in FIG. 1 is a part of a suspension system for an automobile, which includes a main body 1. A suspension arm 2 is mounted on the main body 1 so as to be able to pivot around a pivot shaft 3. ing.

A coil spring 4 is provided between the main body 1 and the suspension arm 2 so as to act as usual. Also, suspended arm 2
A wheel is mounted on the free end of the wheel.

The angular position of the suspension arm 2 relative to the main body 1 changes depending on the static and dynamic loads of the vehicle (for example weight transfer from the rear wheels to the front wheels when the brakes are applied).

The main body 1 includes a brake pressure control (reduction) valve 5 in the usual form.
is firmly mounted. The piston 5 is equipped with a control piston 6 projecting from the bottom of the body. Valve 5 is inlet 5
The brake fluid is allowed to flow freely from inlet 5A to outlet 5B until the pressure at A increases to the "cut-in pressure" and thereafter, as the inlet pressure increases,
For K, the increase in inlet pressure is not transmitted as is.

It is of a format in which only a portion of it is transmitted.

The cut-in pressure is determined by an external force applied to the flai control piston 6.

In order to apply force to the control piston 6 according to the vehicle load,
A load sensing spring 7 is provided. The spring 7 has a first arm 8 slidably fitted in an opening provided in the control piston 6 and a second arm 8 slidably fitted in an opening provided in a stopper IIK attached to the suspension arm 2. arm 9, and a central coil portion 12 that interconnects the first arm 8 and the second arm 9.

The coil part J2 of the spring 7 is connected to the spindle 13 which is coaxial with the pivot 3.
It is mounted on two shelves. The coil portion 12 is slidably fitted onto the spindle 13, and the movement of the coil portion 12 is limited to a direction parallel to the axial direction of the spindle 13, but the coil portion 12 can move freely around the pivot 3. It can be rotated. The coil portion 12 is held on the spindle 13 by a washer 14. Mounting in this way ensures that the spring 7 is held in place without being fixed to the control piston 6 or the stopper, and that the spring 7 also maintains the pivot position of the suspension arm 2 relative to the body 1 (and thus the load on the vehicle). ) will provide the control piston 6 with a spring force determined by:

The preload of the spring 7 can be easily set by adjusting the position of the stopper 11 in the direction of the arrow W or by adjusting the position of the valve 5 in the direction of the arrow X. Further, the spring rate of the spring 7 can be adjusted by moving the stopper 11 in the direction of the arrow Y, or by moving the main body of the spring 7 in the direction of the arrow Z. Since the spring 7 itself is not fixed to the valve 5 or the tension bar 11K, these adjustments can be made easily.

Although the stopper 11 is shown as being attached to the suspension arm 2 separately from the suspension arm 2, it may be integrated with the suspension arm 2.

In the above-mentioned embodiment, the main body is mounted on the sprung weight part of the vehicle body, but the reverse 1ctf5 is mounted on the suspension arm, and a suitable stopper for the spring is provided on the vehicle body. Good too.

(7) Effects of the Invention According to the present invention, a simple load sensing spring can be used and its preload and spring rate can be easily adjusted. Moreover, since the spring only contacts the stopper and the control member, no clamping device or the like is required.

Also, the load sensing device part is compact and can be adapted to the narrow spaces underneath a vehicle (eg, an automobile). In addition, there are fewer components, so the cost and effort required for installation are reduced.

Adjustment of the spring properties, ie preload and spring rate, can be carried out both during initial setup and later, for example during testing.

[Brief explanation of the drawing]

FIG. 1 is a fragmentary side view showing a part of a suspension system for a vehicle 11 according to the present invention. FIG. 2 is a sectional view taken along line A and -A in FIG. FIG. 3 is a view seen from the direction of arrow 13 in FIG. Photo 2) Dropout 3) Hanawa 9Qζ-

Claims (1)

[Scope of Claims] (1) A suspension arm pivotably mounted on a vehicle body so as to be pivotable about a pivot, the position of which relative to the vehicle body depends on the vehicle load. a suspension arm; a brake pressure control valve having a control member and located away from the pivot; a brake pressure control valve, the control member being configured to determine the characteristics of the brake pressure control by an external force applied to the control member; a vehicle load for making the characteristics of the brake pressure control valve dependent on the vehicle load; a spring adapted to apply a force to the control member by a coil portion, a first arm extending away from one end of the coil portion, and a first arm extending away from the other end of the coil portion; In a vehicle comprising: a spring having a second arm;
The coil portion θ2 is mounted on a spindle (+Jvc) coaxial with the pivot shaft (3), the first arm (8) is in contact with the control member (6), and the second arm (9) is in contact with the control member (6). ) is in contact with a stopper αJ provided on the suspension arm (2) at a position away from the pivot shaft, etc.), and the stopper (
Vehicle characterized in that either Ll) or the brake pressure control-1'f (5) or both are movable in order to adjust the preload and spring rate of the spring (7). (2) A state of contact between at least one of the control member (6) and the stopper U and the spring (7). characterized in that the spring (7) is free to slide relative to the control member (6) or the stop circle when adjusting the preload or spring rate of the spring (7); A vehicle according to claim 1. (3) The vehicle according to claim 1, wherein the spring (7) is slidably fitted into an opening provided in the control member (61vC). 7) is the opening Q provided in the stopper U.
4. The vehicle according to claim 3, wherein the vehicle is slidably fitted within the vehicle. (5) first and second arms (8, 9) of the spring (7);
The vehicle according to any one of claims 1 to 4, characterized in that the coil portion (12) of the spring (7) extends in a substantially figure-7 shape. ) to the stopper U is greater than the distance from the pivot (3) to the control member (6).
The brake pressure control valve (5) or the stopper (1
1) parallel to the adjacent arm (8 or 9') K of the spring (7) in order to adjust the spring rate of the spring (7) without changing the preload of the spring (7). The vehicle according to any one of the above, characterized in that it is movable in a direction (Z or Y). (8) The brake pressure control valve (5) or the stopper Q, 1) without changing the spring rate (to adjust the preload of the spring (7)).
in the direction perpendicular to the adjacent arm (8 or 9) (X
or W) A vehicle according to any one of claims 1 to 7, characterized in that it is movable.