JPS5840364Y2 - 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 the control cable, causing accelerator pedal vibrations and causing unpleasant sensations to 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.

That is, as shown in the first figure, the inner wire 1 of the control cable has a barrel-shaped hollow body with a circumferential wall of approximately uniform thickness near the end fitting 4 on the accelerator pedal side, and a hollow body in the center of one end surface. The inner wire 1 is elastically fitted into the through-hole constituting the boss portion 7' protruding inward from the hollow body, and a vibration-proofing rubber 7 having an opening 7'' on the other end surface is fitted into the through-hole, and the vibration-proofing rubber 7 On the left side of the figure, there is a dish-shaped resin bush 6 having a spherical recess σ' corresponding to the end surface of the vibration isolating rubber 7 and a protruding leg 6' at the other end, and a washer on the right side of the vibration isolating rubber 7 in the figure. 8, terminal fitting 4, washer 8,
The anti-vibration rubber 11 and the bush 6 are wired in the direction of the arrow 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 cab brake.

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 a very remarkable 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 θ2 +17° to -6°,
The pedal rod left and right displacement amount 5 = 40 reaches the maximum wear, and the vibration isolating rubber 7 is connected to the inner wire 1 at the 12 locations shown in the boss portion 7'.
This is a defect that causes scratch-like deep groove-like damage due to the inner wire sliding, deterioration of the feeling of operating the Arcel pedal due to increased frictional resistance of the inner wire sliding, and sudden loss of vibration damping function.

The object of the present invention is to provide a vibration isolating rubber with a new structure to be applied to the vibration isolating device, and to provide a good operating feeling and high stability of the accelerator pedal, thereby permanently maintaining the vibration isolating function.

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

Fig. 4.5 shows an embodiment of the present invention, in which the anti-vibration rubber 13
is a hollow body having an approximately round shape, and includes a shaft hole 14 having a boss portion 17 that loosely fits an inner wire into the center of the left end face in the drawing and projects inward from the hollow portion 18; It is composed of an opening 15 on the right end face in the figure and a circumferential wall 16 having a substantially uniform thickness, and furthermore, the main inner circumference of the shaft hole 14 is composed of a resin cylinder 19 fitted into a boss portion 17.

The resin cylindrical body 19 is provided with a convex annular flange 20 on the end surface so as not to easily come off during use, and is integrated with the vibration isolating rubber 13 by a known insert method to form the inner surface of the shaft hole 14 which is concentric and the same size. Form.

Note that the tapered portion at the left end of the illustrated shaft hole 14 is an enlarged portion for alleviating damage to the inner wire 1 due to the usage state shown in the third figure.

When the above newly constructed vibration isolating rubber is applied to an accelerator pedal vibration isolating device based on the combination configuration and wiring similar to the conventional device shown in the second figure, the inner wire 1 and The sliding resistance on the inner surface of the boss portion 17 is physically extremely reduced, the deep groove-like damage caused by the inner wire 1 is completely suppressed, and the effective vibration damping effect due to the presence of the vibration isolating rubber 13 is stably maintained. .

In a comparison test using an actual vehicle (inner tension crab 4kg)
, displacement S: 40 wear), the conventional product had a service life limit of 700,000 cycles, but the invented product maintains a good accelerator pedal operating condition with a vibration-proofing effect even after 3 million cycles. The effect was made clear.

As described above, the present invention is useful in preventing unpleasant vibrations felt by the driver and stably and permanently maintaining a good operating condition of the accelerator pedal.

[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 rubber according to the present invention. FIG. 5 is a plan view of the resin cylindrical body. 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: petal rod, 11: accelerator pedal, 13: anti-vibration rubber according to the present invention, 19: resin cylinder.

Claims (1)

[Scope of utility model registration request] A hollow three-dimensional anti-vibration rubber having a shaft hole in the center into which an inner wire is loosely fitted, and a hollow part surrounding and surrounding the inner wire, wherein a resin cylinder is fitted into the main part of the shaft hole. A vibration-proof rubber for an accelerator pedal characterized by having an inner surface of the shaft hole.