JPS5840362Y2 - Anti-vibration rubber for accelerator pedal - Google Patents

Description

[Detailed description of the invention] In a structure that remotely transmits the force on the accelerator pedal of an automobile, etc. to a carburetor via a control cable,
It is a well-known phenomenon that engine vibrations are transmitted back to the driver's seat via a control cable, causing vibrations in the accelerator pedal and causing a sense of indecision that should be avoided in the human body.

The present invention relates to the structure of a vibration isolating rubber suitable for a vibration isolating device for an accelerator pedal, which aims to eliminate the above-mentioned discomfort.

Conventionally, the vibration isolating device often uses a rubber damper system, but recently there has been a remarkable tendency to apply hollow three-dimensional vibration isolating rubber as a structure that has an extremely effective vibration damping effect.

Specifically, as shown in the first diagram, the inner wire 1 of the control cable is provided with a roughly barrel-shaped hollow body having a circumferential wall of approximately uniform thickness near the end fitting 4 on the accelerator pedal side. The inner wire 1 is elastically fitted in the center of the hollow body, and a vibration isolating rubber 7 having a through-hole forming a boss portion 7' projecting inwardly of the hollow body and an opening 7'' on the other cross section is inserted, and further vibration proofing is achieved. On the left side of the vibration isolating rubber 7 in the illustration, there is a dish-shaped resin bushing 6 which has a spherical concave portion corresponding to the end surface of the vibration isolating rubber 7 and a protruding leg 6' on the other end, and on the right side of the vibration isolating rubber 7 in the illustration. The washer 8 is fitted to the other end, and the terminal fitting 4, washer 8, anti-vibration rubber 7, and bushing 6 are abutted and assembled in the direction of the arrow, and the cables are routed as shown in the second figure.

That is, the outer casing 2 of the control cable is curved and fixed to the vehicle body frame 5 via the locking fitting 3, and the operated end fitting 4' of the inner wire 1 is engaged with the main part of the carburetor.

On the other hand, the protruding leg 6' of the pusher 6 is fitted integrally with the main part of the pedal rod 9 which rotates via the fulcrum 10 when the accelerator pedal 11 is depressed in the direction of the arrow, thereby controlling the action of the inner wire 1 in the direction of the arrow. It is a composition that plays.

In the above configuration, the accelerator pedal enjoys an extremely significant vibration-proofing effect through the intervention of the vibration-proofing rubber 7, which effectively eliminates the discomfort felt by the human body in a wide range of engine speeds and improves the feeling of driving a car. is extremely useful.

However, as shown in FIG. 3, the inner wire 1 undergoes a bending displacement of θ as shown in the figure, following the circular arc movement of the insertion portion of the inner wire 1 as the pedal rod 9 is rotated.

On the other hand, the vibration isolating rubber 7 is elastically compressed and deformed in response to the tensile force of the inner wire 1, and the inner wire 1 slides while pressing the inner surface of the boss portion 7' downward in the figure, and the bush 6 and the vibration isolating rubber 7 resemble circular arcs. Since the contact is on a curved surface, the relative sliding contact movement in the direction of the arrow shown in the figure is repeated frequently and violently.

In mass-produced passenger cars, the positive and negative directions of θ = +17°--6°,
The petal rod left and right displacement amount S240 reaches the maximum wear, and the vibration isolating rubber 7 is attached to the inner wire 1 at the 12 locations shown in the boss portion 7'.
There is a technical defect that causes deep scratch-like damage to occur at an early stage, resulting in a sudden loss of anti-vibration function.

The purpose of this invention is to improve the structure of the anti-vibration rubber applied to the anti-vibration device to achieve high durability that meets the requirements of automobiles, and to permanently maintain the anti-vibration function of the high-level stabilizer of the accelerator pedal. shall be.

The present invention will be explained below based on the drawings.

Figure 4.5 shows an embodiment of the present invention.

The anti-vibration rubber 13 is a hollow body having a generally approximate shape as shown by dotted lines in its original form, and an inner wire is elastically inserted into the center of the left end face in the figure to protrude inward from the hollow portion 18. It is common to the conventional one, and is composed of a through hole 14 having a boss portion 17, an opening 15 on the right end surface II (opening 15), and a peripheral wall 16 having a substantially uniform thickness.

The feature of the present invention is as described above, in order to suppress the relative sliding contact movement between the bushing and the anti-vibration rubber, the bushing closely contacts the circumferential edge 20 of the bushing 6 that is fitted in combination with the anti-vibration rubber, and the diameter of the long circumferential edge 20 An annular protrusion 19 having a similar diameter is attached to the vibration isolating rubber 13.
It has a structure that is integrally connected to the peripheral wall 16 of.

The vibration isolating rubber 13 having the above novel structure is applied to a vibration isolating device for an accelerator pedal based on the combination configuration and wiring similar to the conventional device shown in the second figure.

In the device to which the anti-vibration rubber 13 of the present invention is applied,
In the bending displacement state of the inner wire 1 due to the rotation of the pedal rod as shown in FIG. The contact phenomenon is completely suppressed and the two act essentially as one.

Therefore, the progression of deep groove-like damage that occurs in the conventionally shaped vibration isolating rubber 7 is drastically reduced, and the effective vibration isolating effect based on the vibration isolating rubber is maintained extremely stably.

In a comparison test using an actual vehicle (inner wire tension crab 4 kg, displacement S: 40 wear), the conventional product reached the limit of deep groove damage after 700,000 cycles and lost its practicality, but the invented product
It has a durability of 1,000,000 cycles, satisfies the performance requirements of modern automobiles, and has a remarkable unique effect.

As described above, the present invention is useful in stably and continuously preventing the unpleasant vibrations of the accelerator pedal that the driver feels, thereby contributing to improving the driving sensation.

[Brief explanation of drawings]

Fig. 1: An explanatory diagram of a vibration isolating device for an accelerator pedal with a conventional configuration, Fig. 2: A diagram of its wiring configuration, Fig. 3: A diagram of its use, and Fig. 4: A vibration isolating device according to the present invention. One embodiment front view A, C side view B% Fig. 5: Fig. 4 is a usage state diagram of the embodiment. Explanation of main symbols: 1: Inner wire, 2: Outer casing, 3: Locking metal fitting, 4.4': Terminal metal fitting, 6:
push, 7: anti-vibration rubber, 9: pedal rod, 11: accelerator pedal, 13: anti-vibration rubber according to the present invention, 19: annular projection, 20: periphery of push.

Claims (1)

[Scope of utility model registration request] It has a hollow three-dimensional anti-vibration rubber in the center through which the inner wire for the control cable is inserted, and a concave surface that engages with the accelerator pedal rod and fits into the end face of the anti-vibration rubber.
1. A vibration isolator for an accelerator pedal, in which a vibration isolator for an accelerator pedal has two bushings brought into contact with each other, the vibration isolating rubber for an accelerator pedal having a structure in which an annular protrusion is provided on the outer periphery of the vibration isolating rubber circumferential wall, the annular protrusion closely contacting the periphery of the disc shaped bushing.