JPH068958Y2 - Rear wheel hydraulic pressure control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rear wheel hydraulic pressure control device for controlling a brake hydraulic pressure supplied to a rear wheel brake of an automobile.

(Prior Art) Generally, the brake fluid pressure supplied to the rear wheel brakes of an automobile has a low degree of increase in fluid pressure above a predetermined fluid pressure in order to prevent the rear wheels from being locked during braking. As described above, it is controlled by the hydraulic pressure control device. That is, a hydraulic pressure break point having a gradient change at a predetermined hydraulic pressure point is formed on the hydraulic pressure rise line. On the other hand, from the relationship of the vehicle load capacity,
It is considered desirable to change the hydraulic break point. As a measure to deal with such a demand, in a proportion valve that controls the hydraulic pressure so that the brake hydraulic pressure break point of the rear wheel changes according to the change of the loading load, install it on the operation member for hydraulic pressure control and the rear wheel side. It is proposed that an elastic coupling member that is displaced by a change in the rear wheel vehicle height is provided between the unsprung member and the rear wheel brake, and the hydraulic break point of the rear wheel brake is changed according to the change. (See, for example, JP-A-58-56955).

(Problems to be Solved by the Invention) When the elastic connecting member is provided between the operating member and the unsprung member of the proportion valve as in the above-mentioned known example, the elastic force which is displaced by the rear wheel vehicle height change is provided. Since the connecting member acts as a load detecting spring, it needs to be attached under a predetermined load condition. However, in the case of the above-mentioned known example, since the lower end of the elastic connecting member is connected to the axle casing which is the unsprung member via the two adjusting nuts, the elastic connecting member is set in a desired load state. Has to adjust the screwing degree of the two adjusting nuts, and there is room for improvement in the assembling workability. Further, a configuration in which the load detecting spring and the axle casing are connected by a link member is also conceivable, but as with the above-mentioned known example, workability is deteriorated and the set load of the load spring is changed due to an attachment error of the link member. The problem occurs.

The present invention has been made in view of the above points, and an object of the present invention is to make it possible to easily assemble an elastic connecting member acting as a load detecting spring in a rear wheel hydraulic control device in a desired load state. It is a thing.

(Means for Solving Problems) In the present invention, as means for solving the above problems,
Hydraulic adjustment that is connected to the unsprung member mounted on the rear wheel side through an elastic connecting member that is displaced by changes in the rear wheel vehicle height and is regulated so that a predetermined load is applied during assembly. In a rear wheel hydraulic pressure control device having an operation member for use in the rear wheel, wherein the hydraulic pressure break point of the rear wheel brake is changed according to the displacement of the rear wheel vehicle height, the unsprung member is provided with the elastic coupling member. A biasing means that pivotally supports a swing link that is coupled to the lower end and that is capable of swinging in the elastic displacement direction of the elastic coupling member, and that applies a biasing force to the swing link in a direction to pull the elastic coupling member. Is attached, and the swing link can be positioned and fastened to the unsprung member by a positioning means at an arbitrary swing position.

(Operation) In the present invention, the following operations can be obtained by the above means.

That is, when the elastic connecting member to be interposed between the operating member and the unsprung member is assembled to the rear wheel hydraulic pressure control device, the swinging motion is pivotally supported by the unsprung member. After the link is made swingable and the lower end portion of the elastic connecting member that has been previously set to a desired load state is connected to the swing link, the swing link is urged by the urging force of the urging means. By the procedure of automatically returning to the proper position and then positioning and fastening the swing link by the positioning means, the assembly in the initial set load state can be carried out very easily.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the rear wheel hydraulic pressure control system of the present embodiment includes a proportion valve 2 fixed to a vehicle body 1 which is a sprung member located above a suspension spring (not shown), and the proportion valve 2. The elastic connecting member 4 connects the hydraulic pressure adjusting operation member 5 and the axle casing 3 which is an unsprung member located below the suspension spring.

In the proportion valve 2, as shown in FIG. 2, the brake fluid pressure P to be supplied to the rear wheels is at the inlet 6
Is supplied to the rear wheel side from the outlet 9 through the pressure chamber 7 and the clearance S on the outer circumference of the piston 8 which reciprocates in the pressure chamber 7. The hydraulic pressure is adjusted by opening and closing S. That is, due to the difference between the hydraulic pressure acting on the outlet side of the piston 8 and the hydraulic pressure acting on the inlet side, the piston 8
By reciprocating in the left-right direction, the gap S is opened and closed, whereby the hydraulic pressure is adjusted. Further, the piston 8 is configured so that the urging force of the elastic connecting member 4 and the spring 10 acts via the operating member 5 abutted on the end thereof, and the urging force of these is commensurate with these urging forces. Brake fluid pressure can be obtained. That is, the urging force from the elastic connecting member 4 acting on the piston 8 changes according to the amount of displacement of the elastic connecting member 4 depending on the size of the loaded load, and the brake fluid pressure is corresponding to the change. The hydraulic pressure break point of is changed. Reference numeral 11 is a bleeder device, and 12 is a spare entrance for the front wheels.

The elastic connecting member 4 is a coil spring in the present embodiment, and the upper end thereof is connected to one end of the operating member 5 of the proportion valve 2, while the other end thereof is connected to the bracket 13 of the axle casing 3. Is connected to the end of a swing link 14 which is swingably supported. The swing link 14 has a substantially L shape, and is bolted so as to swing in the elastic deformation direction of the elastic connecting member 4 with respect to the bracket 13 (that is, the arrow A and B directions in FIG. 1). It is pivoted by 15. Further, a positioning means 16 for positioning the swing link 14 at an arbitrary swing position is provided at an intermediate bent portion of the swing link 14. The positioning means 16 comprises a fastening tool 16a provided on the side of the swing link 14 and a guide groove 16b formed in the bracket 13 to guide the fastening tool 16a. That is, when the fastening tool 16a is in the state before the completion of fastening, the fastening tool 16a can be guided along the guide groove 16b so that the swing link 14 can be swung. On the other hand, when the fastening device 16a is in the fastening completed state, the swing link 14 is positioned at that position. Further, in the present embodiment, the swing link 14 is pulled in the direction in which the elastic connecting member 4 is pulled by the spring 17 acting as a biasing means having an extremely weaker biasing force than the elastic connecting member 4. , Arrow A).

Next, a procedure for assembling the elastic connecting member 4 in the illustrated rear wheel hydraulic pressure control device will be described.

The elastic connecting member 4 is assembled in an initially set load state. At this time, the engaging portions 4a, 4a formed near both ends of the elastic connecting member 4 are clamped by the jig 18. Thus, the elastic connecting member 4 is compressed to a dimension L that allows a desired load state to be obtained, and under this state, the upper end of the elastic connecting member 4 is first connected to the end of the operating member 5 of the proportion valve 2. After that, the fastening tool 16a constituting the positioning means 16 is brought into the state before the fastening is completed, and the first
The swing link 14 at the position shown by the chain line in the drawing is attached to the spring 1
After swinging in the direction of the arrow B against the urging force of 7, the lower end of the elastic connecting member 4 is connected, and then the spring 17
When the oscillating link 14 is returned in the direction of the arrow A by the urging force, the fastening tool 16a is completely tightened and the oscillating link 14 is positioned, and then the assembly of the elastic connecting member 4 is completed. . Then, the jig 18 is removed from the elastic connecting member 4.

As described above, according to this embodiment, the elastic coupling member 4 can be assembled in a desired load state by a very simple operation.

The present invention is not limited to the configuration of the state embodiment, and it goes without saying that the design can be appropriately changed without departing from the scope of the invention.

(Effect of the Invention) As described above, according to the present invention, the unsprung member mounted on the rear wheel side is displaced by the change of the rear wheel vehicle height, and a predetermined load is applied during assembly. A rear wheel fluid having an operation member for hydraulic pressure adjustment connected through an elastic connection member regulated by the rear wheel brake and changing the hydraulic pressure break point of the rear wheel brake according to the displacement of the rear wheel vehicle height. In the pressure control device,
A swing link that is connected to the lower end of the elastic connecting member and is swingable in the elastic displacement direction of the elastic connecting member is pivotally supported by the unsprung member, and the elastic connecting member is attached to the swing link. Since the urging means for applying the urging force in the pulling direction is additionally provided, and the oscillating link can be positioned and fastened to the unsprung member by the locating means at any oscillating position, the rear wheel When assembling the elastic connecting member to the hydraulic control device, the swing link is set in a swingable state, and the lower end portion of the elastic connecting member, which is in a predetermined load state in advance, is connected to the swing link. After tightening, the oscillating link is automatically returned to the proper position by the urging force of the urging means, and then the oscillating link is positioned and fastened by the positioning means. There are practical effect that every well and performed very easily.

[Brief description of drawings]

FIG. 1 is a side view showing the outline of a rear wheel hydraulic pressure control device according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 2 ... Proportional valve 3 ... Unsprung member (axle casing) 4 ... Elastic connecting member 5 ... Operating member 14 ... Swing link

Claims (1)

[Scope of utility model registration request] 1. An unsprung member mounted on the rear wheel side is connected via an elastic connecting member that is displaced by a change in vehicle height of the rear wheel and is regulated so that a predetermined load is applied during assembly. A rear wheel hydraulic pressure control device having a hydraulic pressure adjusting operation member for changing a hydraulic pressure break point of a rear wheel brake according to a displacement of a rear wheel vehicle height, A swing link that is connected to the lower end of the elastic connecting member and is swingable in the elastic displacement direction of the elastic connecting member is pivotally supported in the direction of pulling the elastic connecting member with respect to the swing link. Biasing means for applying a biasing force is additionally provided, and the rocking link can be positioned and fastened to the unsprung member by a positioning means at an arbitrary rocking position. Hydraulic control device.