JPH03161813A - Pedal bearing structure for automobile - Google Patents

Abstract

PURPOSE:To prevent the generation of uncomfortable shock contact sound and shocking sense to driver's feet by bending and deforming a flexible parts divided by respective slits to the boss part side in respective gaps due to contact pressure between the inner peripheral edge of a bush and a fulcrum pin. CONSTITUTION:Plural slits 12 are formed on the brush 4 from its flange (5) part in the axial direction over a proper length, e.g. about a half of the brush length, and the flexible parts 13 divided by respective slits 12 are formed. On the other hand, gaps 14 for securing the distortion margins of the flexible parts 13 are formed between the inner periphery of the end part of the boss part 3 and the outer periphery of the flexible part forming part of the bush 4 corresponding to the inner periphery of the end part of the boss part 3. When the inner periphery edge of the bush 4 comes into contact with the fulcrum pin 10 at a point by the inclination of the boss part 3, the flexible part of the contacted part is bended and deformed to the boss part side by the contact pressure within a gap formation range. Consequently, a shock contact sound between the edge of the bush 4 and the fulcrum pin 10 is suppressed by buffer action based upon the distorted deformation of the flexible parts 13 and the shocking sense to the driver's feet can be also suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pedal bearing structure for automobile pedals such as automobile clutch pedals, accelerator pedals, and brake pedals.

Conventional technology Automatic clutch pedals, accelerator pedals, etc. have a cylindrical boss fixed to a pedal lever with a pedal pad at the lower end, as shown in, for example, Japanese Utility Model Application Publication No. 62-36830. A fulcrum pin is inserted through the fulcrum pin, and the fulcrum pin is supported by a pedal bracket fixed to the vehicle body side, and is assembled so as to be rotatable about the fulcrum bin as a fulcrum.

This will be explained in detail with reference to FIGS. 5 and 6. Reference numeral (2) is a pedal lever having a pedal pad 2 at its lower end, and a cylindrical boss 3 is fixed to its upper side. The lower part of the pedal lever L is bent to one side in the vehicle width direction, and the pedal pad 2 is appropriately offset from the general part of the pedal lever I so that the pedal pad 2 is at a position where it is easiest for the driver to press the pedal. It is offset in the vehicle width direction by an amount Q. Bushes 4 made of resin material are provided at both ends of the boss portion 3.
are inserted and arranged. This bush 4 has a flange 5 integrally molded around its one end, and this flange 5 is locked to the end of the boss 3.

In such a pedal lever (2), the boss 3 is disposed between a pair of side walls 7, 7 of a pedal bracket 6 having a U-shaped cross section fixed to the vehicle body, and the through hole 8 of one side wall 7 is inserted into the pedal bracket 6.
The fulcrum bottle 10 is inserted through the boss portion 3 toward the through hole 9 of the other side wall 7, and the tip thereof is assembled by tightening and fixing the nut I1.
It is rotatable around O as a fulcrum. Here, in order to smoothly rotate the pedal lever I that uses the fulcrum pin 10 as a fulcrum, there is a gap between the bush 4 and the fulcrum bin IO, and between the flange 5 of the bush 4 and the side wall 7 of the pedal bracket 6. Required clearances δ1 and δ2 are set between them, respectively.

Problems to be Solved by the Invention As mentioned above, in order to smoothly rotate the pedal lever 1, there are Since a clearance δ1δ is set between them, the boss portion 3 is offset from the pedal lever I even when the pedal pad 2 is depressed diagonally, as well as when it is depressed normally. It is tilted with respect to the fulcrum bin 10. As a result, as shown in Fig. 7, the inner edge of the bush j4 makes point contact with the fulcrum pin IO at both ends of the boss 3, which not only causes abnormal noise, but also causes the impact to be transmitted to the driver's feet. However, there were defects that impaired quality and reliability.

Therefore, the present invention has been developed so that even if the boss part of the pedal lever is tilted with respect to the fulcrum bin when the pedal is depressed,
To provide a pedal bearing structure for an automobile that does not generate unpleasant impact noise or give a feeling of impact to a driver's feet.

Means for Solving the Problem A bush made of a resin material and having a flange on the periphery of one end that engages with the end face of the boss is inserted into each end of a cylindrical boss fixed to the pedal lever. In the structure in which the boss portion is disposed between a pair of side walls of the pedal bracket, and is inserted into a fulcrum pin fixed through these side walls, and is assembled to be rotatable about the fulcrum pin as a fulcrum, the bush A plurality of slits are provided at appropriate lengths in the axial direction from the flange part,
While forming a flexible part divided by these slits, the flexible part A gap is formed to ensure the bending allowance.

When the boss part of the pedal lever is tilted with respect to the fulcrum pin when the action pedal is depressed, the inner circumferential edge of the bush comes into point contact with the fulcrum pin at both ends of the boss part.
Due to this contact pressure, the flexible portion is deflected and deformed toward the boss portion in the gap range, thereby exerting a buffering effect, and this buffering effect suppresses the generation of impact noise and impact sensation. Furthermore, the bending deformation of the flexible portion is accompanied by a prying action between the end surface of the boss portion of the end flange and the side wall of the pedal bracket, causing friction, thereby making the buffering action more effective.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, with the same reference numerals assigned to the same parts as in the conventional structure.

In Figures 1 to 3, a pedal lever I is provided with a pedal pad 2 (see Figure 1) offset in the vehicle width direction at its lower end.
A cylindrical boss 3 is fixed to the upper side, and the boss 3 is made of a resin material, with flanges 5 formed at both ends of the boss 3 on the periphery of one end. The bushing 4 is inserted and arranged, and the boss portion 3 is arranged between a pair of side walls 7, 7 of a bracket 6 having a U-shaped cross section fixed to the vehicle body side, and is inserted through these side walls 7, 7. The basic structure is the same as that of the prior art in that it is inserted through a fulcrum pin 10 which is fixed by tightening a nut 11, and is rotatably assembled around the fulcrum pin 10 as a fulcrum.

Here, a plurality of slits l2 are provided in the bush 4 over an appropriate length in the axial direction from the flange 5 portion, for example, approximately half of the bush length, and these slits l2
The flexible portion 13 is divided into sections. Moreover, between the inner periphery of the end of the boss 3 and the outer periphery of the flexible portion 13 forming portion of the bush 4 corresponding to the inner periphery of the boss 3,
A gap 14 is formed to ensure a bending allowance for the flexible portion l3.

In this embodiment, a tapered portion 3a having a larger diameter on the edge side is formed on the inner periphery of the end portion of the boss 3, and the above-mentioned gap l4 is set.

According to the above embodiment structure, in order to smoothly rotate the pedal lever l, the bush 4 and the fulcrum pin 1 are
0 and between the flange 5 of the bush 4 and the side wall 7 of the pedal bracket 6, respectively.
δ, and that the pedal pad 2 is offset in the vehicle width direction, the boss portion 3 tends to tilt with respect to the fulcrum pin IO when the pedal is depressed. Due to the inclination of part 3, bush 4
When the inner circumferential edge of the fulcrum pin 10 comes into point contact with the fulcrum pin 10, the contact pressure causes the flexible portion 13 of the contacting portion to bend and deform toward the boss 3 side as shown in the third figure in the area where the gap I4 is formed. . As a result, the impact noise between the edge of the bush 4 and the fulcrum pin IO is suppressed by the buffering effect caused by the bending deformation of the flexible portion 13, and the feeling of impact on the driver's feet is also suppressed. Moreover, such flexible parts [3
The bending deformation is accompanied by a prying action between the end surface of the boss portion 3 of the end flange 5 and the side wall 7 of the pedal bracket 6, causing friction, thereby making the buffering action more effective.

In the above embodiment, a tapered portion 3a is provided on the inner periphery of the boss portion 3 to form the gap 4, but as shown in FIG. 4, the flexible portion 13 of the bush 4 is A tapered portion 42L having a smaller diameter on the flange 5 side may be provided on the outer periphery of the portion to form the gap 14, or a stepped portion may be formed in place of the tapered portions 3a and 4a.

Effect of the invention = 7 As described above, according to the present invention, even if the boss part of the pedal lever is tilted with respect to the fulcrum bottle when the pedal is depressed, the inner circumferential edge of the bush that is fitted and arranged at both ends of the boss part When the fulcrum pin comes into point contact with the fulcrum pin, the flexible part divided between the slits bends and deforms toward the boss part in the gap due to the contact pressure, acting as a buffer, thereby causing unpleasant impact noise and the driver's foot. It is possible to avoid the occurrence of a feeling of impact. In addition, this bending deformation of the flexible portion is accompanied by a prying action between the end face of the boss portion of the end flange and the side wall of the pedal bracket, causing friction, which makes the buffering action more effective and prevents collisions. It is possible to eliminate the sound and impact sensation. Furthermore, since the gap also functions as a grease reservoir, it has the advantage of increasing lubricity, which is a great practical effect.

[Brief explanation of the drawing]

Fig. I is an exploded perspective view showing one embodiment of the present invention, Fig. 2 is a sectional view of the same, Fig. 3 is a sectional view showing a bending deformation state of the flexible portion, and Fig. 4 is a different example of the present invention. 8 is a sectional view, FIG. 5 is a front view showing the conventional structure, FIG. 6 is a sectional view taken along line A-A in FIG. 5, and FIG. 7 is a sectional view showing the inclination of the boss portion. . I... Pedal lever, 3... Boss part, 4... Bush, 5... Flange, 6... Pedal bracket,
7... Side wall, lO... Fulcrum bottle, 12...
・Slit, I3...Flexible part, l4...Gap. 10 FJ Reclam Piercology Fig. 3 13

Claims (1)

[Claims] (1) At both ends of a cylindrical boss fixed to the pedal lever, bushes made of a resin material with a flange formed on the periphery of one end that engages with the end face of the boss are fitted and arranged. Place it between a pair of side walls of the pedal bracket,
In a structure in which a fulcrum pin fixed through these side walls is inserted and assembled so as to be rotatable about the fulcrum pin as a fulcrum, a plurality of slits are formed in the bush at appropriate lengths in the axial direction from the flange portion of the bush. are provided to form a flexible section divided by these slits,
A gap is formed between the inner periphery of the end of the boss portion and the outer periphery of the flexible portion forming portion of the bushing corresponding to the inner periphery of the end of the boss portion to ensure a bending allowance for the flexible portion. Automobile pedal bearing structure.