JP2002163026A - Vibration control structure of pedal device - Google Patents

Abstract

(57) [Problem] To provide a vibration damping structure of a pedal device capable of damping over a wide range of vibration frequencies without impairing the operability of the pedal device. SOLUTION: When a support arm 3 of a pedal device vibrates with a vibration of a vehicle, an annular weight 5 held with a predetermined gap C in a hollow annular housing 4 fitted and fixed to the support arm 3. And the housing 4 relatively oscillates and collides with sliding friction. Then, the vibration is attenuated by the sliding friction between the two and the energy loss due to the collision, and the support arm 3 is damped together with the housing 4. At this time, the annular weight 5 and the housing 4 collide with each other via the cushioning member 5C, and the cushioning member 5C prevents generation of a collision sound between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping structure for reducing the vibration of a pedal device mounted on a vehicle, and more particularly to a small, lightweight and quiet vibration damping structure for a pedal device.

[0002]

2. Description of the Related Art In a vehicle such as an automobile, a vehicle body, its attached devices, parts, and the like vibrate due to vibration of an engine and vibration of a running wheel. When this vibration is large, not only does the durability of the vehicle decrease, but also vibration and noise are transmitted to the vehicle interior, and the quietness, comfort, driving operability, and the like of the vehicle decrease. Therefore, mass dampers, dynamic dampers, vibration dampers, and the like have been conventionally used as measures to suppress vibrations of the engine, the vehicle body, its attached devices, and parts.

The mass damper changes the natural frequency of a vibrating object by adding a weight to a target member (hereinafter referred to as a vibrating object) whose vibration is to be reduced. Therefore, it is necessary to increase the weight of the weight corresponding to the weight of the vibrating object. The dynamic damper is for damping a vibrating object by the spring constant of the elastic body and the weight of the weight, and is effective for a specific vibration frequency, but cannot cope with a wide range of vibration frequencies. Furthermore, the vibration damping material is a material in which a sheet-like elastic member is adhered to a single layer or a plurality of layers for a plate-shaped vibration object. Function varies depending on temperature.

[0004]

Here, pedal devices such as an accelerator pedal, a brake pedal, and a clutch pedal, which are arranged in a vehicle cabin, are driven by the vibration of the engine or the wheels of the vehicle. Vibrates with a wide range of vibration frequencies with the support arm. The pedal device transmits unpleasant vibrations to the driver's feet when the driver steps on the pedal. Therefore, from the viewpoint of improving the quietness and comfort of the vehicle and improving the driver's driving sensation in particular, measures to control the vibration of the pedal device are important issues.

[0005] As a countermeasure against vibration of the pedal device, the dynamic damper is not suitable because it cannot cope with a wide range of vibration frequencies. Also, the mass damper is
It is not preferable because the weight of the pedal device may be increased and its operability may be impaired. Further, since the pedal device has a small surface area, a sufficient damping effect cannot be expected depending on the attachment of the damping material. Under such circumstances, there has been a demand for a vibration control measure suitable for a pedal device that can control the pedal device over a wide range of vibration frequencies without impairing the operability of the pedal device.

Accordingly, an object of the present invention is to provide a vibration damping structure of a pedal device capable of damping over a wide range of vibration frequencies without impairing the operability of the pedal device.

[0007]

In order to solve the above-mentioned problems, the present invention relates to a vibration damping structure for suppressing vibration of a pedal device mounted on a vehicle, and a support arm for supporting a pedal of the pedal device. Is characterized in that an annular weight is fitted with a predetermined gap so that it can relatively oscillate and collide.

In the vibration damping structure for a pedal device according to the present invention,
When the support arm of the pedal device vibrates due to the vibration of the vehicle, the annular weight fitted to the support arm with a predetermined gap and the support arm relatively oscillate with sliding friction and collide. I do. The vibration is attenuated by the sliding friction between the two and the energy loss caused by the collision, and the support arm is damped.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vibration damping structure for a pedal device according to the present invention will be described below with reference to the drawings. In the drawings to be referred to, FIG. 1 is a side view showing an entire vibration damping structure of a pedal device according to a first embodiment of the present invention, and FIG.
FIG. 3 is an exploded perspective view showing the internal structure of the housing shown in FIG.
FIG. 3 is a sectional view taken along line III-III in FIG. 1.

As shown in FIG. 1, the vibration damping structure of the pedal device according to the first embodiment is a pedal device 1 such as an accelerator pedal, a brake pedal, a clutch pedal, etc., mounted on a vehicle.
This is a structure that suppresses the vibration of. The vibration damping structure of this pedal device includes a support arm 3 that supports the pedal 2 of the pedal device 1.
Is provided with a hollow annular housing 4 fitted and fixed in advance.

The upper end (not shown) of the support arm 3 is pivotally attached to the vehicle body so that the support arm 3 can swing in the front-rear direction of the vehicle body. Also, in order to be able to return to the rear predetermined position,
Swinging by a return spring (not shown), and
Locked by a stopper. This support arm 3
It extends diagonally downward from the upper end toward the rear of the car body,
The vicinity of the lower end is bent obliquely upward. And
The pedal 2 is fixed to the lower end of the support arm 3 so that the pedal 2 can be operated.

The housing 4 is loosely fitted to a bent portion near the lower end of the support arm 3 before assembling the support arm 3 to the vehicle body. And this housing 4
When the support arm 3 is mounted on the vehicle body, it is fixed by restricting its longitudinal movement so as to maintain a substantially vertical standing posture. In this case, the forward and backward movement of the housing 4 can be restricted by projecting a set screw or a stop pin from the support arm so as to contact the front and rear surfaces of the housing 4. However, when the housing 4 is made of synthetic resin, The housing 4 may be fixed by welding if the housing 4 is made of steel.

Here, as shown in FIG. 2, the housing 4 accommodates the annular weight 5 in a sealed state.
A housing body 6 having a fitting hole 6A having a rectangular cross section corresponding to the cross-sectional shape of the support arm 3, and a housing lid 7 having a fitting hole 7A that matches the fitting hole 6A.
It is composed of In the illustrated example, the housing body 6 accommodates the annular weight 5 in correspondence with the annular weight 5 being formed in a substantially rectangular annular shape having a rectangular hole 5A. A substantially rectangular annular receiving recess 6B is formed around the fitting hole 6A. The outer peripheral shape of the housing main body 6 surrounding the housing recess 6B is formed in a rectangular front shape slightly larger than the outer circumference of the housing recess 6B in the illustrated example.

On the other hand, the housing lid 7 is formed in a rectangular shape so that its outer shape matches the outer shape of the housing main body 6. To be fixed. That is, when the housing body 6 and the housing lid 7 are made of synthetic resin, they are fixed to each other by means such as fusion or adhesion, and when they are made of steel, they are fixed by welding.

The housing body 6 has a fitting hole 6A.
Is set according to the cross-sectional shape of the support arm 3, and is not limited to a rectangle. The front shape of the accommodation recess 6B is set according to the front shape of the annular weight 5, and corresponds to these when the annular weight 5 is formed in a circular or elliptical annular shape. Is set to a circular or elliptical shape. Furthermore, the outer shapes of the housing main body 6 and the housing lid 7 can be appropriately changed in consideration of design, as long as the weight of the housing 4 is not unnecessarily increased.

As shown in FIG. 3, the annular weight 5 is formed by coating a surface of a steel core material 5B with a cushioning member 5C such as synthetic rubber. The core material 5B is not limited to steel, and various materials having a large specific gravity can be used. Further, as the cushioning member 5C, a synthetic rubber having a high specific gravity is suitable, but not limited thereto, and various synthetic resin materials having a buffering effect can be used. The surface of the cushioning member 5C is formed smoothly.

The annular weight 5 oscillates relatively to the housing recess 6B of the housing 6, and a predetermined gap is formed in the housing recess 6B so as to collide via the buffer member 5C. Owned and contained. That is, the annular weight 5 is accommodated in the accommodation recess 6B with a movable gap C of 0.1 to 0.5 mm in the vertical and horizontal directions. The reason why the gap C is set to 0.1 mm or more is that if the gap C is less than 0.1 mm, the energy loss due to the collision between the annular weight 5 and the housing body 6 due to the vibration of the support arm 3 is small, and the gap C is sufficient. This is because a damping effect cannot be expected. The reason why the gap C is set to 0.5 mm or less is that if the gap C exceeds 0.5 mm, a collision noise between the annular weight 5 and the housing body 6 due to the vibration of the support arm 3 may occur. It is.

In the vibration damping structure of the pedal device according to the first embodiment having the above-described structure, when the support arm 3 of the pedal device 1 vibrates with the vibration of the vehicle, it is fitted and fixed to the support arm 3. In the hollow annular housing body 6, the annular weight 5 and the housing body 6
In the range of the gap C of up to 0.5 mm, collision occurs with relative vibration with sliding friction. The vibration is attenuated by the sliding friction between the two and the energy loss due to the collision,
The support arm 3 and the pedal 2 are damped together with the housing 4. At this time, the annular weight 5 collides with the housing main body 6 via the cushioning member 5C, and the cushioning member 5C prevents generation of a collision sound.

That is, according to the vibration damping structure of the pedal device of the first embodiment, the housing body 6 and the annular weight 5 which vibrate together with the support arm 3 relatively vibrate with relatively sliding friction. By the collision, the support arm 3 and the pedal 2 are damped, and this damping action is exerted over a wide range of vibration frequencies, so that the pedal device 1 is damped over a wide range of vibration frequencies. be able to.

The vibration damping structure of the pedal device of the first embodiment has a simple structure in which a hollow annular housing 4 is fitted and fixed to a support arm 3 and an annular weight 5 is accommodated in the housing 4. In addition, since the housing 4 and the annular weight 5 can be configured to be small and lightweight, the operability of the pedal device 1 is not hindered.

Furthermore, since the shock-absorbing member 5C prevents the collision noise between the housing 4 and the annular weight 5, the noise is quiet. Therefore, according to the vibration damping structure of the pedal device of the first embodiment, the quietness and comfort of the vehicle can be improved, and the operation feeling of the pedal device 1 for the driver who steps on the pedal 2 can be improved.

In the vibration damping structure of the pedal device of the first embodiment, the surface of the annular weight 5 is covered with a cushioning member 5C, but the cushioning member is provided on the surface of the housing recess 6B of the housing body 6. It may be coated. Further, the buffer member does not need to cover the entire surface of the annular weight 5 and the housing recess 6B as long as the collision noise between the annular weight 5 and the housing main body 6 can be prevented, and partially covers the surface. It may be something. Further, the annular weight 5 may be partially cut away or may have a divided structure.

FIG. 4 shows a vibration damping structure of a pedal device according to a second embodiment of the present invention. In the vibration damping structure of this pedal device, an annular weight 5 configured similarly to the annular weight 5 of the first embodiment is directly fitted to the support arm 3 without passing through a housing. That is, the annular weight 5
Are fitted to the support arm 3 with a predetermined gap C so that they can relatively vibrate and collide.

In the vibration damping structure of the pedal device of the second embodiment, the support arm 3 of the pedal device 1
Is vibrated, the support arm 3 and the annular weight 5 are displaced by 0.1 mm.
In the range of the gap C of 1 to 0.5 mm, the vehicle collides relatively vibratingly with sliding friction. Then, the vibration is attenuated by the sliding friction between the two and the energy loss due to the collision, and the support arm 3 and the pedal 2 are damped. At this time, the annular weight 5 is supported by the support arm 3 via the cushioning member 5C.
And the cushioning member 5C prevents the generation of a collision sound. Therefore, the same operation and effect as in the first embodiment can be achieved in the second embodiment.

In the vibration damping structure of the pedal device according to the second embodiment, the surface of the annular weight 5 is covered with the cushioning member 5C, but the surface of the support arm 3 is covered with the cushioning member. Is also good. Further, the buffer member does not need to cover the entire surface of the annular weight 5 and the support arm 3 as long as the collision noise between the annular weight 5 and the support arm 3 can be prevented.
The surface may be partially coated.

[0026]

As described above, in the vibration damping structure of the pedal device according to the present invention, when the support arm of the pedal device vibrates due to the vibration of the vehicle, it is fitted to the support arm with a predetermined gap. The annular weight and the support arm relatively oscillate and collide with each other with sliding friction. The vibration is attenuated by the sliding friction between the two and the energy loss caused by the collision, and the support arm is damped.

That is, according to the vibration damping structure of the pedal device of the present invention, the vibrating support arm and the annular weight relatively oscillate and collide with each other with sliding friction. Since the vibration damping action is exerted over a wide range of vibration frequencies, the pedal device can be damped over a wide range of vibration frequencies. Further, the simple structure in which an annular weight is fitted to the support arm, and the annular weight can be made small and lightweight, does not hinder the operability of the pedal device.
Therefore, the quietness and habitability of the vehicle can be improved, and the driver's operation feeling of the pedal device can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing the entire vibration damping structure of a pedal device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the internal structure of the housing shown in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view corresponding to FIG. 3, illustrating a vibration damping structure of a pedal device according to a second embodiment of the present invention.

[Explanation of symbols]

 1: Pedal device 2: Pedal 3: Support arm 4: Housing 5: Annular weight 5A: Drilled hole 5B: Core material 5C: Buffer member 6: Housing body 6A: Fitting hole 6B: Housing recess 7: Housing lid 7A: Mating hole

Claims (1)

[Claims] 1. A vibration damping structure for suppressing vibration of a pedal device mounted on a vehicle, wherein an annular weight relatively oscillates and collide with a support arm supporting a pedal of the pedal device. A vibration damping structure for a pedal device, wherein the pedal device is fitted with a predetermined gap.