JP2530709Y2 - Adjustment mechanism of load sensing type brake fluid pressure control device - Google Patents

Description

[Detailed description of the invention] [Industrial applications]

The present invention relates to a load sensing type brake fluid pressure control device used for a vehicle brake device, and more particularly to a mechanism for adjusting a break point of a unit when the load sensing type brake fluid pressure control device is mounted on a vehicle. It is.

[Prior art]

A conventional load sensing type brake fluid pressure control device is already well known from Japanese Patent Application Laid-Open No. 1-80566. The load sensing type brake fluid pressure control device 10 of this publication
3, a pin 116 made of a conductive material is integrally attached to the piston 112, and is formed between the pin 116 and the housing 111, as shown in FIG. A conductive boot 118 is provided to close the opening. As a result, the load sensing type brake fluid pressure control device 100 is capable of conducting electricity from the conductive rod spring 117 to the conductive housing 111 via the pin 116 and the conductive boot 118, and the pin 116 and the rod The contact (zero contact) with the spring 117 can be confirmed by energization and non-energization between the bar spring 117 and the housing 111. And, in order to set the break point of the unit of the load sensing type brake fluid pressure control device 100 to a set value, the load sensing type brake fluid pressure control device 100 is mounted on the vehicle with a reference shaft load applied to the vehicle, By moving the housing 111 up and down, the pin 116 and the bar spring 11
By the energization at the time of contact with 7, the zero contact between the pin 116 and the bar spring 117 can be confirmed and adjusted.

[Problems to be solved by the invention]

However, in the adjustment with the conventional load sensing type brake fluid pressure control device, the housing is moved up and down manually, and the housing is securely fixed to the vehicle body when the lamp is turned on (energized). Even if the housing is lowered too much, the lamp is turned on, so it is very difficult to check and adjust the delicate zero hit. As a result,
The break point of the unit of the load-sensing brake fluid pressure control device was greatly varied, and the accuracy of the break point of the unit was deteriorated. Therefore, an object of the present invention is to make it possible to adjust the break point of the load-sensing type brake fluid pressure control device easily and accurately while checking the zero-contact state in an analog manner. It is to have done.

[Means for Solving the Problems]

Accordingly, the present invention provides a hydraulic proportional control valve, a load transmitting member for transmitting a load to the hydraulic proportional control valve, and elastic means disposed between the load transmitting member and the unsprung member of the vehicle. In the load sensing type brake fluid pressure control device with
A supporting portion for supporting one end of the elastic means, a connecting portion provided with a receiving surface for rotating and sliding at least about the axis, and a connecting portion attached to the supporting portion; A screwing portion movably supported and axially movably engaged with one of the load transmitting member and the unsprung member; and axially moving the screwing portion by screwing into the screwing portion. Adjusting means for adjusting an amount and rotating with respect to the connecting portion together with the screwing portion when an axial force is applied from the hydraulic proportional control valve through a load transmitting means. It is assumed that.

[Action]

In the adjusting mechanism of the load-sensing brake fluid pressure control device in this means, after the load-sensing brake fluid pressure control device is mounted on the vehicle, the screw portion is inserted into one of the load transmitting member or the spring member, and the adjusting means is provided. By turning, you will adjust the zero hit. By turning the adjusting means, the screwing ratio portion moves in the axial direction, and the gap between the hydraulic proportional control valve and the load transmitting member is gradually narrowed. The member will surely come into contact.
The abrupt increase in the reaction force due to the contact between the hydraulic proportional control valve and the load transmitting member causes the axial force between the threaded portion and the adjusting device to rapidly increase, so that the adjusting device and the threaded portion are provided. Start turning around. In this state, zero hit occurs, and the rotation operation (adjustment operation) of the adjustment means is stopped.

【Example】

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 in FIG. 1 denotes a housing. The housing 1 is mounted on a not-shown rear cross member which is a part of the vehicle body. The housing 1 is formed with an input port 3 communicating with a master cylinder (not shown) and an output port 5 communicating with a wheel cylinder (not shown) and a hydraulic proportional control valve 7 is connected between the input port 3 and the output port 5. It is installed in between. The hydraulic proportional control valve 7
Reduces the hydraulic pressure of the input port 3 so as to have a hydraulic characteristic proportional to the load transmitted to the valve 7,
Output to The housing 1 has a rod 9 (a load transmitting member).
Is pivotally supported at one end thereof. This rod 9
Is in contact with the front end of the hydraulic proportional control valve 7 at its outer peripheral portion, and transmits a load to the hydraulic proportional control valve 7. The other end of the rod 9 has a receiving portion for a compression coil spring 11 (elastic means).
13 are integrally formed. The receiving portion 13 includes a main body 15 made of a synthetic resin and a fixing member 17, each of which is formed in an annular shape. The fixing member 17 is a compression coil spring 11
Is fixed at one end. The other end of the compression coil spring 11 is connected to the support portion 23 of the shaft coupling 20. The support portion 23 is a guide shaft 25 that extends until it penetrates the annular receiving portion 13.
And a disk 27 that is screwed into the guide shaft 25 and directly contacts the other end of the compression coil spring 11, and a pair of nuts 29 and 31 for positioning the disk 27 in the axial direction of the guide shaft 25. It is configured. One end of the guide shaft 25 is formed in a step shape so as to temporarily fix a jig described later. The other end of the guide shaft 25 is a connecting portion.
Combine with 40. The connecting portion 40 is formed integrally with the other end of the guide shaft 25, is formed into a tulip shape by a synthetic resin, and has a receiving surface slidable on a gate surface as a receiving surface.
A spherical ball 43 slidably inserted in 41 and a boot for protecting a sliding surface between the ball 43 and the socket 41 from dust proof.
45, and a hexagonal regulating member 47 integrally formed with the ball 43 for regulating the axial movement of the boot 45. The ball 43 is formed integrally with the screw portion 50.
The screw portion 50 has an external thread formed therein, and is inserted into a hole of a lower arm 51 (unsprung member) of a suspension device (not shown). An adjusting means 60 is screwed into the screwing ratio portion 50. The adjusting means 60 is composed of a pair of nuts 61 and 63 abutting on respective side surfaces of the lower arm 51, and is securely fixed to the lower arm 51 so that the screwed portion 50 does not move in the axial direction. I do. In the load-sensing brake fluid pressure control device configured as described above, the distance between the vehicle body and the lower arm 51 changes due to the load of the vehicle, resulting in a compression coil spring.
11 is compressed, and the reaction force is transmitted to the hydraulic proportional control valve 7 via the rod 9. The hydraulic proportional control valve 7
Means to reduce the hydraulic pressure at the input port 3 so as to have a hydraulic characteristic proportional to the vehicle load, and output it to the output port 5. Next, the adjustment procedure of this embodiment will be described with reference to FIG. The first stage is the mounting operation. At this stage, the adjusting mechanism of the load-sensing brake fluid pressure control device is mounted on the rear cross member, the threaded portion 50 of the shaft coupling 20 is inserted into the hole of the lower arm 51, and the nut 63 is threaded. Temporarily attached to the tip of the joint 50. In this mounting stage, the jig 70 is mounted between one end of the guide shaft 25 and the receiving portion 13, and the compression coil spring 11 is compressed by an amount corresponding to the adjustment load so that a predetermined unit break point occurs. I have. Generally, the adjustment load is about 1000 kg. The second stage is a zero hit adjustment. At this stage, the lower part of the guide shaft 25 is lifted up with the left hand, and the gap between the hydraulic proportional control valve 7 and the rod 9 is held to be zero. In this state, the nut 61 is turned and lowered from the position 61 '.
When the nut 61 is rotated even after the nut 61 contacts the side surface of the lower arm 51, the hydraulic proportional control valve 7 and the rod 9
Is reliably reduced to zero, and the gaps between individual members and the initial microelastic deformation are absorbed, so that the threaded portion 50
As a result, the axial force between the
61 and the threaded portion 50 start rotating. At this stage, the gap between the hydraulic proportional control valve 7 and the lower arm 51 is sufficiently filled, and the zero hit adjustment is completed. The third stage is a fixed stage. On this stairs, the ball 43
After holding the hexagonal regulating member 47 integrally formed with the screw member 50 with a wrench or the like so that the screwing portion 50 does not rotate, the nut 63 temporarily attached to the screwing portion 50 is raised from the position of 63 'and tightened. Thereafter, the jig 70 is removed, and the adjustment work is completed. As described above, in this embodiment, the nut 61 is rotated until the nut 61 and the threaded portion 50 rotate while the hydraulic proportional control valve 7 and the rod 9 are in zero contact. Since the gap between the hydraulic pressure proportional control valve 7 and the lower arm 51 can be reliably reduced to zero, the breaking point of the unit of the load-sensing brake hydraulic pressure control device can be adjusted with high accuracy. In the state, the nut 61 and the threaded portion 50 rotate, so that the zero hitting state can be directly felt by eyes and hands, and further, the progress of the zero hitting state can be achieved by rotating the nut 61 and the screwing portion 50. As a result that the angle can be viewed in an analog manner, adjustment of the break point of the unit of the load sensing type brake fluid pressure control device can be performed very easily and reliably. As mentioned above, the specific embodiment of the present invention has been described.
The present invention is not limited to this embodiment, but includes various embodiments within the scope described in the claims for utility model registration. For example, in this embodiment, the shaft coupling 20 is connected to the lower arm
Although installed on the 51 side, the shaft coupling 20 may be installed on the rod 9 side, and the compression coil spring 11 may be provided between the lower arm 51 and the shaft coupling 20. Further, the screw portion 50 is attached to the lower arm 51. However, the screw portion 50 may be attached to an axle housing or a differential case which is an unsprung member.

[Effect of the invention]

As described above, according to the present invention, when the adjusting mechanism of the load-sensing brake fluid pressure control device is brought into the zero hit state, the threaded portion and the adjusting means start rotating, and as a result, the zero hit state, and The state of progress can be adjusted in an analog manner, and the adjustment of the break point of the unit can be adjusted extremely easily and accurately.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an adjusting mechanism of a load sensing type brake fluid pressure control device according to one embodiment of the present invention, and FIG. 2 is a diagram showing an adjusting mechanism of the load sensing type brake fluid pressure control device of FIG. FIG. 3 is a longitudinal sectional view showing a load sensing type brake fluid pressure control device according to the prior art. 7: Hydraulic proportional control valve 9: Rod (load transmitting member) 11: Compression coil spring (elastic means) 23: Support section 20: Shaft coupling 40: Connection section 50: Screw section 51 … Lower arm (unsprung member) 60 …… Adjustment means

Claims (1)

(57) [Scope of request for utility model registration] A hydraulic proportional control valve, a load transmitting member for transmitting a load to the hydraulic proportional control valve, and an elastic means disposed between the load transmitting member and an unsprung member of a vehicle. A load-sensing brake fluid pressure control device, comprising: a support portion that supports one end of the elastic means; and a connection portion that has a receiving surface that is slidably rotated at least around an axis, and is attached to the support portion. One end portion is rotatably slidably supported by the receiving surface of the connecting portion, and is engaged with one of the load transmitting member and the unsprung member so as to be movable in the axial direction. When the screw is screwed to adjust the amount of axial movement of the screwing portion, and when an axial force is applied from the hydraulic proportional control valve through load transmitting means, the screwing portion and the connecting portion are moved together with the connecting portion. Characterized by comprising a rotating adjusting means. Adjustment mechanism for intelligent brake fluid pressure control device.