JPH092228A - Retainer assembly structure for load-responsive braking hydraulic pressure control device - Google Patents

Abstract

(57) [Summary] [Purpose] The wear of the retainer is reduced by suppressing the rotation of the retainer due to the vibration of the load responsive braking hydraulic pressure control device, and the snap portion is separated from the retainer.
Eliminate the risk that the retainer will come off the lever. [Structure] The lever 5 has an assembling hole 25 having an elliptical shape for assembling the retainer 7 at one end, and the retainer 7 has a main body portion 26.
Hole 23 having a tapered inner peripheral surface for assembling the rod 8
And a snap portion 24 which is provided on the periphery of the hole 23 and which is similar to the assembling hole 25 and which projects on one side surface of the main body 26 and which surrounds the assembling hole 25 on one side surface of the lever 5. The retainer 7 is inserted into the mounting hole 25 from the other side surface of the lever 5 from the snap portion 24, and the snap portion 24 is elastically locked around the mounting hole 25 on one side surface of the lever 5, and the retainer 7 Since the main body portion 26 of is related to the other side surface of the lever 5,
The retainer 7 is fixed in a non-rotatable manner by being restricted from moving in the rotation direction by the lever 5 and also restricted from moving in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load-responsive braking hydraulic pressure control for setting a rear hydraulic pressure reduction start hydraulic pressure in accordance with a displacement between an unsprung portion and an unsprung portion depending on a vehicle load. A load responsive braking hydraulic pressure control device in which a lever and a rod, which are members that transmit a displacement between an unsprung portion and an unsprung portion of the device according to a loaded load, are connected via a resin retainer. The present invention relates to the retainer assembling structure.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Laid-Open No. 1-141176, a retainer assembly structure of a conventional load-responsive braking hydraulic pressure control device is applied to a loading load between a sprung portion and an unsprung portion. The lever, which is one of the members for transmitting the force corresponding to the corresponding displacement to the control plunger, has a circular mounting hole for mounting the retainer, and the retainer is also provided between the sprung portion and the unsprung portion. Has a hole through which a rod, which is one of the members for transmitting the force corresponding to the displacement according to the loaded load of the control plunger, is transmitted to the control plunger, and the assembly hole is formed around the same hole as the main body portion on the other side surface of the lever. Is formed on a circular circumference similar to that of the main body portion and protrudes to one side surface side of the main body portion and a snap portion related to the periphery of the assembly hole on one side surface of the lever, and from the other side surface side of the lever to the assembly hole. When the retainer is inserted from the snap section, Possible movement directions, axially is restricted movement, the retainer is assembled pivotably on the lever.

[0003]

However, the retainer assembly structure of the load responsive braking hydraulic pressure control device described above has the following problems.
When the load-responsive braking hydraulic pressure control device is attached to the vehicle, the load-responsive braking hydraulic pressure control device also vibrates when the vehicle vibrates while traveling on a bad road or the like. The vibration causes the resin retainer to rotate around the rod, and the rotation of the resin retainer causes the retainer and the lever to come into contact with each other, causing the connecting portion between the snap portion and the retainer main body to wear, which in turn cuts the snap portion from the retainer. There is a possibility that the retainer may be detached and the retainer may come off the lever.

The present invention reduces the wear of the retainer by suppressing the rotation of the retainer due to the vibration of the load responsive braking hydraulic pressure control device, and the snap portion is separated from the retainer so that the retainer is separated from the lever. The technical problem is to eliminate the risk of slipping off.

[0005]

In order to solve the above technical problems, the present invention transmits a force between a sprung portion and an unsprung portion according to a displacement according to a load to a control plunger. One end of the lever, which is one of the members, is also penetrated by a rod, which is one of the members that transmits a force corresponding to the displacement between the sprung portion and the unsprung portion according to the load to the control plunger. In a retainer mounting structure of a load responsive braking hydraulic pressure control device in which a resin retainer is assembled, the lever has an elliptical assembly hole for mounting the retainer at one end, and the retainer is for mounting the rod. And a main body portion on the other side surface of the lever, which is provided on an elliptical circumference similar to the assembly hole around the same hole portion and protrudes to one side surface side of the main body portion on one side surface of the lever. It consists of the snap part around the assembly hole. To constitute a retainer structure for fastening the load responsive brake fluid pressure control device characterized in that it is fixedly inserted from the retainer above the snap portion to said assembling hole from the other side of the lever.

[0006]

In the retainer assembly structure of the load-responsive braking hydraulic pressure control device of the present invention, the retainer is inserted from the other side surface of the lever into the assembly hole from the snap portion, and the snap portion is assembled on one side surface of the lever. The retainer is elastically locked around the mounting hole, the retainer body is engaged with the other side surface of the lever, the movement in the rotation direction is restricted, and the movement in the axial direction is restricted. It is fixed immovably.

[0007]

The present invention will be described below in more detail with reference to examples.

(Embodiment 1) FIG. 1 is a sectional view of a load responsive braking hydraulic pressure control device having a retainer assembly structure of the load responsive braking hydraulic pressure control device of the present invention. The load responsive braking hydraulic pressure control device 1 includes a master cylinder for braking (not shown).
It has a proportioning valve (hereinafter referred to as P valve) 2 having a known structure that distributes the brake fluid pressure from the above to brake cylinders (not shown) for the front and rear wheels. P valve 2
Is equipped with a piston 15 and an L-shaped bracket 3 which is a stationary member, and is fixed to a sprung member (not shown). The bracket 3 is provided with a lever 5 penetrating a hole 4 in the bracket 3 and having the hole 4 as a fulcrum. The lever 5 abuts the piston 15, and the lever 5
One end of the bracket 3 faces the other piece of the bracket 3, and a follower spring 6 is provided between one end of the lever 5 and the other piece of the bracket 3 which face each other. The urging force of the secondary spring 6 causes the lever 5 to rotate counterclockwise around the hole 4 and push the piston 15 into the housing of the P valve 2 as seen in FIG.

A retainer 7 having a hole 23 is provided at the other end of the lever 5.
Is provided, and the rod 8 that penetrates the hole 23 of the retainer 7 and has its tip locked to the retainer 7 is provided. Rod 8
A main spring 10 is installed between the retainer 7 and the seat 9 screwed into the threaded portion 11 of the. The biasing force of the main spring 10 forces the rod 8 downwards as seen in FIG.

By changing the position of the seat 9 with respect to the rod 8, the biasing force of the main spring 10 can be adjusted. The biasing force of the main spring 10 also brings the retainer 7 into close contact with the other end of the lever 5 to prevent rattling between the two.

The biasing force of the secondary spring 6 also serves to prevent the rattling of the piston 15 and the lever 5.

The lower end of the rod 8 is wound around a groove 18 provided on the outer circumference of the rubber bush 12.

Two grooves 16 are provided on the inner periphery of the cylindrical rubber bush 12. A groove 17 surrounding the center hole is provided on both end surfaces of the rubber bush 12. Further, a groove 18 is provided on the outer circumference of the rubber bush 12. A collar 1 in which the lower end of the rod 8 is wound around a groove 18 provided on the outer periphery of the rubber bush 12, and plates 20 and 20 'are integrally provided at the respective ends of the center hole of the rubber bush 12.
Plates 9 and 19 'are threaded through collars 19 and 19'
Axle side support bolts 13 welded to 0 and integrated
Is penetrated, and the plate 2 is attached to both end surfaces of the rubber bush 12.
0, 20 ', the shaft support bolt 13 of the mounting member 14 is inserted into the hole of the bracket 21 on the unsprung portion side, the nut 22 is tightened, and the plate 20, 20' is fixed.
Both end surfaces of the rubber bush 12 are pressed against each other, and the mounting member 14 is fixed to a member (not shown) on the unsprung portion side. In a normal state, both end surfaces of the rubber bush 12 are the plates 20, 2
By press contacting with 0 ', the collars 19 and 19' and the shaft support bolt 13 are sealed so as to prevent dust and the like from entering or water from entering.

Since the rubber bush 12 has the groove 16 on the inner periphery and the grooves 17 on both end surfaces, the shape of the rubber bush 12 is easily deformed.
Further, since the lower end of the rod 8 is only partially in contact with the outer periphery on the outer circumference, there is a high degree of freedom in the direction of inclination of the unsprung portion with respect to the sprung portion. Therefore, the shaft support bolt 13 and thus the collars 19 and 19 '. Since the structure allows tilting, when the unsprung portion is tilted with respect to the sprung portion, the shaft support bolt 13 and thus the collars 19 and 19 'and the plate corresponding to the tilt of the unsprung portion with respect to the sprung portion. 20 and 20 'can be easily tilted, and further, both ends of the rubber bush 12 follow the contact of the tilt of the plates 20 and 20' to be contacted with each other, or they are still pressure-contacted to each other to still seal. Therefore, the rod 8 is tilted by allowing the tilt of the shaft support bolt 13 and by extension the collars 19 and 19 'and the plates 20 and 20' while ensuring the sealing function against the tilt of the unsprung portion with respect to the sprung portion. Therefore, it is possible to reduce the wear of the retainer 7 and the lever 5 due to the inclination of the unsprung portion with respect to the sprung portion. or,
The rubber bush 12 also holds an elastic force necessary for transmitting the displacement amount of the unsprung portion with respect to the sprung portion to the rod 8 with as little loss as possible. Further, the groove 8 positions the rod 8.

FIG. 2 is a top view of the lever 5 and the retainer 7 before assembly. Assembly of the lever 5 and the retainer 7 will be described in more detail with reference to FIGS. 1 and 2. The lever 5 has an elliptical mounting hole 25 for mounting the retainer 8 at one end.
And the retainer 8 has a main body 2 related to the other side surface of the lever 5.
6, a hole 23 having a tapered shape in which the inner peripheral surface is enlarged from one side surface toward the other side for assembling the rod 8 and an elliptical circumference similar to the assembly hole 25 around the hole 23. Is provided on the one side surface of the body portion 26 and is provided on one side surface of the lever 5 with the snap portion 24 around the assembly hole 25.

From the other side of the lever 5, the retainer 7 is inserted from the snap portion 24 into the mounting hole 25, and the snap portion 2
4 is elastically locked around the assembling hole 25 on one side of the lever 5, and the main body portion 26 of the retainer 7 engages with the other side surface of the lever 5, so that the retainer 7 can move in the turning direction of the lever 5. The movement is regulated, and the movement in the axial direction is also regulated so that the rotation is fixed.

Therefore, when the load responsive braking hydraulic pressure control device of this embodiment is mounted on a vehicle, the load responsive braking hydraulic pressure control device also oscillates when the vehicle oscillates while traveling on a bad road. The resin retainer does not rotate around the rod due to the vibration of the load responsive braking hydraulic pressure control device, and the contact between the retainer and the lever causes the connection part between the snap part and the retainer main body to wear, and eventually the snap. There is no risk that the part will separate from the retainer and the retainer will disengage from the lever.

[0018]

As described above, according to the present invention,
Wear of the retainer is reduced by suppressing rotation of the retainer due to vibration of the load responsive braking hydraulic pressure control device.
Moreover, it is possible to eliminate the risk that the snap portion will separate from the retainer and the retainer will come off the lever.

[Brief description of drawings]

FIG. 1 is a sectional view of a load-responsive braking hydraulic pressure control device according to a first embodiment.

FIG. 2 is a top view of the lever and the retainer according to the first embodiment before assembling.

[Explanation of symbols]

 1 Load Response Type Braking Hydraulic Pressure Control Device 2 Proportioning Valve 3 Bracket 4 Hole 5 Lever 6 Secondary Spring 7 Retainer 8 Rod 9 Seat 10 Main Spring 11 Screw Part 12 Rubber Bushing 13 Shaft Support Bolt 14 Mounting Member 15 Piston 16 Groove 17 Groove 18 Groove 19, 19 'Collar 20, 20' Plate 21 Bracket 22 Nut 23 Hole 24 Snap 25 Assembly hole 26 Body

Claims (1)

[Claims] 1. A sprung portion and an unsprung portion are also provided at one end of a lever which is one of members for transmitting a force according to a displacement according to a load between the sprung portion and the unsprung portion to a control plunger. In the retainer assembly structure of the load-responsive braking hydraulic pressure control device in which the resin retainer, through which the rod that is one of the members that transmits the displacement according to the load depending on the loaded load between , The lever has an elliptical mounting hole for mounting the retainer at one end, the retainer has a hole for mounting the rod, and the periphery of the same hole as the main body portion on the other side surface of the lever Is provided on the periphery of an elliptical shape similar to the assembling hole and protrudes to one side surface side of the main body portion, and is composed of a snap portion related to the periphery of the assembling hole on one side surface of the lever, and the other side surface side of the lever. From the retainer to the assembly hole. A retainer assembly structure for a load responsive braking hydraulic pressure control device, which is inserted and fixed from a nap portion.