JPH0447018Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a pedal device for a vehicle.

(Prior art) A vehicle pedal device uses hydraulic pressure to engage/disengage a clutch or apply brake braking by depressing the pedal.
Generally, a master cylinder is disposed near the pedal, and the push rod of the master cylinder and the pedal are connected via a mounting fitting.

Figure 3 shows a cross-sectional view of the main parts of a conventional connection structure between a pedal and a master cylinder, in which 1 is the master cylinder, 3 is a cylinder case, 5 is a discharge port, 7 is a piston, 9 is a push rod, and 11 is a mounting bracket. be. The mounting bracket 11 is connected to the pedal through a mounting hole 13, and an elastic member 15 is interposed between the mounting bracket 11 and the push rod 9 in order to reduce pedal vibration and noise when the pedal is depressed. .

However, in the conventional structure, the push rod 9
A connecting tool 17 is attached to the end of the connecting tool 17, an elastic member 15 is provided integrally with the connecting tool 17 via the locking piece 17A and a protrusion 17B of the connecting tool 17, and the elastic member 15 is attached to the cylindrical portion of the mounting bracket 11. Front end portion 11A and both ends 11
B, 11C to prevent the movement of the mounting bracket 11 in the longitudinal direction of the push rod 9.
5 to the push rod 9.

(Problem to be Solved by the Invention) Therefore, when a large load is applied to the pedal when the pedal is depressed, a force may be applied to the elastic member 15 in the direction of bending the mounting bracket 11 and the connector 17, and the elastic member 15 There was a problem in which the durability could not be increased.

The present invention has been devised in view of the above-mentioned circumstances, and the object of the present invention is to provide a vehicle pedal capable of reducing pedal vibration and abnormal noise, and increasing the durability of the elastic member. We are here to provide you with the equipment.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes first elastic members 39 and 41 that absorb vibrations in the longitudinal direction of the push rod 9, and first elastic members 39 and 41 that absorb vibrations in the radial direction of the push rod 9. The first and second elastic members 3 are composed of a second elastic member 43 that absorbs
9, 41, 43 are housed in a cylindrical portion 27 integrally connected to the mounting bracket 21 or the push rod 9,
Moreover, the second elastic member 43 is fitted into the annular recess 49 on the cylindrical portion 27 side.

(Function) Vibrations in the longitudinal direction of the push rod 9 are absorbed by the first elastic members 39 and 41, and vibrations in the radial direction of the push rod 9 are absorbed by the second elastic member 43, respectively. Further, the second elastic member 43 has an annular recess 4 on the cylindrical portion 27 side.
9, the holding rigidity is high.

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

FIG. 1 is a sectional view of essential parts of the pedal device according to the present invention, and FIG. 2 is a sectional view taken along the line - - in FIG. 1 is a push rod connected to the piston 7, 21 is a mounting bracket connected to the pedal side, and 23 is a connector connected to the push rod 9.

The mounting fitting 21 includes a forked base 25 and a cylindrical portion 27 that is fixed to the base 25 and is open on the push rod 9 side, and the base 25 has mounting holes 29, 29 for mounting the pedal.

The connector 23 includes a shaft portion 31 extending in the longitudinal direction of the push rod 9, and the base side of the shaft portion 31 is coupled to the push rod 9 via a lock nut 33. On the tip side of the shaft portion 31, locking pieces 35, . To protrude.

The mounting fittings 21 and the connecting fittings 23 include the first elastic members 39, 41, the second elastic members 43, and the holding member 45.
and the elastic members 39, 41, 43
is made of rubber in the example.

The connector 23 is disposed within the cylindrical portion 27 of the mounting bracket 21 with the protrusion 37 facing the cylindrical base end surface 27A, and an elastic member 39 is provided between the locking pieces 35, . . . and the cylindrical base end surface 27A. intervene.

The elastic member 39 has both end surfaces connected to the cylindrical portion base end surface 27A.
and the locking pieces 35, the protrusion 37 is inserted into the center hole 39A, and the outer peripheral portion 39B is elastically disposed in the base small diameter portion 27B of the cylindrical portion 27.

Inside the cylindrical portion 27 near the open end, there is a constriction portion 4.
An annular holding member 45 is fixed via 7. The inner end surface 45A of the holding member 45 and the locking piece 35
An annular elastic member 41 is interposed between them with both end surfaces in elastic contact with each other, and the mounting bracket 21 is attached via the elastic members 39 and 41.
The axial movement of the push rod 9, i.e. the longitudinal movement of the push rod 9, is transmitted to the coupling 23 and the push rod 9.

An annular recess 49 is formed on the inner peripheral surface of the holding member 45, and the annular recess 49 has an annular surface 49A having a length in the longitudinal direction of the push rod 9 and an annular surface 49.
Step portions 49 projecting radially inward from both longitudinal ends of A
B, 49C.

A second annular elastic member 43 is provided in the annular recess 49.
The outer peripheral part 43A and the inner peripheral part 43B of the elastic member 43 are brought into elastic contact with the annular surface 49A and the shaft part 31, respectively, to support the shaft part 31 in a floating manner, and to prevent the coupling tool 23 from collapsing within the cylindrical part 27. The elastic member 4
3. Control via the holding member 45. Therefore, in the embodiment, the holding portion that holds the outer peripheral portion of the elastic member 43 is constituted by the annular surface 49A of the holding member 45.

The axial movement of the elastic member 43 moves both end surfaces 43C and 43D of the elastic member 43 to step portions 49B and 49.
C, and the recess 43E formed in the inner circumference 43B of the elastic member 43 is filled with grease. In the figure, 51 indicates a claw piece bent from the outer end of the cylindrical portion.

Since this embodiment is constructed as described above, the vibration damping effect of the longitudinal direction of the push rod 9 is achieved through the first elastic members 39, 41, and the push rod 9 is
The second elastic member 43 acts as a buffer against vibrations in the radial direction, thereby reducing pedal vibrations and abnormal noises when the pedals are operated.

Furthermore, even when a large load is applied to the pedal, the force of the load in the direction perpendicular to the longitudinal direction of the push rod 9 is received by the mounting bracket 21 via the elastic member 43 and the holding member 45, so that the elastic members 39, 41, 4
No load is applied to the elastic members 39, 41, 43 in the bending direction as in the conventional case, and therefore the durability of the elastic members 39, 41, 43 can be increased.

In addition, in the embodiment, the elastic members 39, 41, 4
3 are formed separately, the present invention is not limited to the structure of the embodiment. For example, the elastic members 39, 41, and 43 may be formed as one body. In short, the mounting bracket 21 Any structure may be used as long as the mounting bracket 21 and the push rod 9 are connected in a floating manner in the axial and radial directions, and the mounting bracket 21 and the push rod 9 are prevented from falling.

(Effect of the invention) As is clear from the above explanation, according to the invention,
The longitudinal vibrations of the push rod 9 are absorbed by the first elastic members 39 and 41, and the radial vibrations of the push rod 9 are absorbed by the second elastic member 43, so that
It can handle external forces in the longitudinal direction, radial direction, and their combined direction. Further, the second elastic member 43 is connected to the cylindrical portion 24
Since the elastic member is fitted into the annular recess 49 on the side, the holding rigidity is high, and the durability of the elastic member is high even when a large load is applied. Therefore, in a pedal device in which an elastic member is interposed between a mounting bracket coupled to the pedal side and a push rod of a master cylinder, it is desirable to reduce pedal vibration and noise and increase the durability of the elastic member. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a pedal device, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is a cross-sectional view of a main part showing a conventional connection structure between a pedal and a master cylinder. In the drawing, 1 is the master cylinder, 7 is the piston,
9 is a push rod, 21 is a mounting bracket, 23 is a connector, 27 is a cylindrical portion, 39 and 41 are first elastic members,
43 is a second elastic member, and 45 is a holding member.

Claims (1)

[Claims for Utility Model Registration] A master cylinder 1 having a mounting bracket 21 coupled to the pedal side, a push rod 9 disposed near the pedal, and a push rod 9 interposed between the mounting bracket 21 and the push rod 9. In a vehicle pedal device including an elastic member capable of freely transmitting the movement of the mounting bracket 21 in the longitudinal direction to the push rod 9, the elastic member includes first elastic members 39, 41 that absorb vibrations in the longitudinal direction of the push rod 9; , a second elastic member 43 that absorbs vibrations in the radial direction of the push rod 9, and these first and second elastic members 39, 41, 43 are cylindrical parts integrally connected to the mounting bracket 21 or the push rod 9. 27, and the second elastic member 43 is fitted into an annular recess 49 on the side of the cylindrical portion 27 so as to be restrained from moving in the longitudinal direction.