JP2001051737A - Pedal device for automobile and damper used for the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pedal device in which the range of pedal stepping force is widend, which can be installed compact, which can easily adjust reaction having a hysteresis characteristic and which is little in characteristic change and to provide a suitable damper used for the pedal device. SOLUTION: This damper has a spring means 4 rocking/energizing a pedal arm 3 in an initial rocking position and a damper 5 giving resistance force to the rocking of the pedal arm 3. The damper 5 has a rotor 28 which is confronted with a mobile object 23 arranged so that it can freely move in an axial direction and does not move in a direction around an axis and which is arranged so that it is freely and relatively rotated around an axis, a coil spring 27 and a friction resistance force generation means 29 generating friction resistance force as resistance force in the relative rotation of the rotor 28, detaching the mobile object 23 in the axial direction from the rotor 28 against the elastic force of the coil spring 27 and increasing the spring force of the coil spring 27 so as to increase friction resistance force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pedal device having a damper for appropriately applying braking to an accelerator pedal arm, a brake pedal arm, a clutch pedal arm and the like of an automobile, and a damper suitable for use in the pedal device.

[0002]

In order to reduce fuel consumption and reduce carbon dioxide of an automobile, fine control of fuel injection of an automobile engine is required. Accordingly, the throttle valve opening is adjusted by depressing an accelerator pedal. It has been practically performed electronically.

[0003] In an automobile in which fuel injection of an engine is electronically controlled, an accelerator wire disposed between an accelerator pedal arm and a throttle valve is usually omitted. However, in an accelerator wireless automobile, compared with an automobile having an accelerator wire, Then, the reaction force with respect to the pedal depression force is different, and the hysteresis characteristic in the relationship between the pedal depression amount and the pedal depression force is substantially narrow, in other words, the pedal depression force characteristic with respect to the pedal depression amount becomes linear. For this reason, when a general driver who is accustomed to a car with an accelerator wire drives an accelerator wireless car, it depresses the accelerator too much, consumes more fuel than ever, or has a certain amount of pedal depression. It may be difficult to maintain the rotational position of the accelerator pedal arm

When a large spring force of the return spring for returning the pedal arm to the initial rotation position is simply increased in order to obtain a large reaction force with respect to the pedal depression force, a large reaction force from the return spring at the time of constant-speed running causes the pedal to have a large reaction force. There is a possibility that the foot may cause early fatigue.

Therefore, one end is terminated via a coil spring and a pedal arm is connected to the other end of the dummy cable inserted through the fixed helical tube. It has been proposed to obtain a reaction force having a hysteresis characteristic in the relationship between the pedal depression amount and the pedal depression force, but the solution using this dummy cable is a comparative method for installing a dummy cable. Because it requires a large space, it can only be used for large vehicles with sufficient space, such as trucks and RVs, and it is relatively difficult to adjust the reaction force using a dummy cable. In addition to the cost increase, a metal dummy cable may be slid over the resin-coated inner surface of the pipe to obtain hysteresis characteristics. By, although cause sliding resistance between the resin-coated inner surface of the metallic dummy cable and the pipe, there is a possibility that a large characteristic change occurs in long-term use in wear due to the sliding.

The above problem is not limited to the accelerator pedal arm. For example, in the brake pedal arm or the clutch pedal arm, an appropriate return rotation resistance is generated by using the above-described dummy cable or the like.
This can also occur when obtaining hysteresis characteristics.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and an object of the present invention is to keep a turning position of a pedal arm constant at the pedal depression amount according to the pedal depression amount. A pedal device that can increase the range of the pedal depressing force, can be installed more compactly than a dummy cable, can adjust the reaction force with hysteresis characteristics extremely easily, and has little characteristic change. An object of the present invention is to provide a damper suitable for use in a pedal device.

[0008]

According to a first aspect of the present invention, there is provided a pedal apparatus for an automobile, wherein first spring means for urging the pedal arm to rotate to an initial rotation position, and resistance to rotation of the pedal arm is provided. A damper for applying a force, wherein the damper is movable in the axial direction and is fixedly arranged in the direction around the axis, and is relatively rotatable around the axis facing the movable body. And a second spring means for elastically urging the movable body toward the rotating body, and generating a frictional resistance as the resistance in the relative rotation of the rotating body,
The movable body is separated from the rotating body in the axial direction against the elastic force of the second spring means so as to increase the spring force of the second spring means, thereby increasing the frictional resistance force. And rotation of the pedal arm is transmitted as relative rotation of the rotating body.

According to the pedal device of the first aspect, when the rotating body is relatively rotated by the rotation of the pedal arm due to the depression of the pedal, an increased frictional resistance is generated in the frictional resistance generating means. By this resistance force, for example, the accelerator pedal is depressed too much, so that the fuel is not consumed more than ever.Moreover, the turning position of the pedal arm at the pedal depression amount is kept constant according to the pedal depression amount. As a result of being able to increase the range of the pedal depression force that can be maintained, the pedal depression amount can be easily maintained constant according to the speed during low-speed to high-speed constant speed traveling, causing early fatigue to the pedal depression foot. And the like can be eliminated.

According to a second aspect of the present invention, there is provided the pedal apparatus of the first aspect, wherein the frictional resistance generating means is provided on one surface of the rotating body facing the movable body in the axial direction. And a projection integrally formed by protruding toward one surface of the movable body, and one surface of the movable body facing the rotating body, in an axial direction toward one surface of the rotating body. The projections are integrally formed with the projections, and the projections are in surface contact with each other.

[0011] In the pedal device of the second aspect, the frictional resistance generating means is constituted by a projection disposed between the movable body and the rotating body and integrally formed with each of the movable body and the rotating body. Therefore, it can be extremely compact,
It can be installed by effectively using a small space, and furthermore, in order to bring the two projections into surface contact, it is possible to determine the resistance force that can be roughly given to the rotation of the pedal arm by appropriately setting the friction coefficient at the contact surface. In addition, it is possible to extremely easily adjust the reaction force having a hysteresis characteristic in the relationship between the pedal depression amount and the pedal depression force.

In a pedal device for a vehicle according to a third aspect of the present invention, in the pedal device according to the first or second aspect, the frictional resistance generating means is provided on one surface of the rotating body facing the movable body. It has an inclined surface formed and an inclined surface formed on one surface of the movable body facing the rotating body and in surface contact with the inclined surface.

According to the pedal device of the third aspect, the frictional resistance generating means has an inclined surface formed on one surface of the rotating body and an inclined surface formed on one surface of the movable body facing the rotating body. By appropriately setting the coefficient of friction with the surface, it is possible to determine the resistance that can be applied to the rotation of the pedal arm, and it is extremely easy to adjust the reaction force with hysteresis characteristics in the relationship between the pedal depression amount and the pedal depression force. It can be carried out.

According to a fourth aspect of the present invention, there is provided the pedal apparatus of the second or third aspect, wherein the frictional resistance generating means has a fixed surface which is in surface contact with the other surface of the rotating body. are doing.

In the pedal device according to the fourth aspect, by appropriately setting the friction coefficient between the other surface of the rotating body and the fixed surface, it is possible to determine the resistance force that can be roughly given to the rotation of the pedal arm. Similarly to the pedal device of the embodiment, the reaction force adjustment having the hysteresis characteristic can be performed extremely easily.

In the pedal device according to the fourth aspect,
Each of the other surface and the fixed surface of the rotating body that comes into surface contact with each other may be formed as inclined surfaces, similarly to the pedal device of the third embodiment.

According to a fifth aspect of the present invention, in the pedal device for an automobile, in the pedal device according to any of the above aspects, the second spring means includes at least two concentrically arranged coil springs. The at least two coil springs have different elastic moduli.

The second spring means may be any one using rubber or a leaf spring. Preferably, the second spring means is provided with at least one coil spring.
When the second spring means is constituted by at least two coil springs having different elastic coefficients from each other as in the pedal device of the fifth aspect, it is possible to make the second spring means excellent in durability and simple in structure. Can be used for fine adjustment, and the design and adjustment of the resistance force can be easily performed, which is extremely preferable from this viewpoint.

In a pedal device for an automobile according to a sixth aspect of the present invention, in the pedal device according to any one of the above aspects, the pedal arm is rotatably supported by the support frame, and the damper includes the movable body and the movable body. The rotating body has a bottomed cylindrical body disposed inside, and the second spring means has one end abutting on the bottom of the cylindrical body and the other end abutting on the movable body, respectively. The frictional resistance generating means is configured to generate a frictional resistance as the resistance in the relative rotation of the rotating body with respect to the cylindrical body, and to resist the elastic force of the second spring means. By moving the movable body away from the rotating body in the axial direction and approaching the bottom of the cylindrical body to increase the spring force of the second spring means, the frictional resistance is increased. The rotation of the arm moves between the cylindrical body and the rotating body. It is adapted to be transmitted as rotation of the relative.

[0020] In a pedal device for an automobile according to a seventh aspect of the present invention, in the pedal device according to the sixth aspect, the cylindrical body has a fixed surface that comes into surface contact with the rotating body.

In the pedal device according to the seventh aspect, since the fixing surface is formed in a cylindrical body, it can be formed more preferably compact. It is needless to say that the fixing surface may be formed on the support frame or the pedal arm instead of being formed on the cylindrical body.

In the pedal device for an automobile according to an eighth aspect of the present invention, in the pedal device according to the seventh aspect described above, the positioning position of the fixing surface is freely adjustable in the axial direction.

According to the pedal device of the eighth aspect, since the positioning of the fixing surface in the axial direction can be adjusted, the initial elastic force generated by the second spring means, in other words, the initial resistance force can be arbitrarily adjusted. Can be set, and an optimal initial resistance can be obtained.

In a pedal device for an automobile according to a ninth aspect of the present invention, in the pedal device according to any one of the sixth to eighth aspects described above, the bottom of the cylindrical body can be positioned and adjusted in the axial direction. .

According to the pedal device of the ninth aspect, since the bottom of the cylindrical body can be positioned and adjusted in the axial direction, the initial elastic force generated by the second spring means can be obtained similarly to that of the eighth aspect. In other words, the initial resistance can be arbitrarily adjusted and set, and an optimum initial resistance can be obtained.

According to a tenth aspect of the present invention, in the vehicle pedal device according to any one of the above aspects, the pedal arm is an accelerator pedal arm.

According to an eleventh aspect of the present invention, there is provided a pedal device for a vehicle, the pedal arm being rotatably supported by a support frame, and a first spring for urging the pedal arm to an initial rotation position. Means, and a damper for imparting a resistance to the rotation of the pedal arm. The damper is provided with a bottomed cylinder, and is movable in the cylinder in the axial direction with respect to the cylinder. There is a movable body fixedly arranged in the direction around the axis, a first end abutting on the bottom of the cylindrical body, and a second end abutting on the movable body, and a second one arranged between the movable body and the bottom of the cylindrical body. Two spring means, a rotating body disposed in the cylindrical body facing the movable body and rotatable relative to the cylindrical body about its axis, and the resistance force in the relative rotation of the rotating body with respect to the cylindrical body. As well as resisting the elastic force of the second spring means. And moving the movable body away from the rotating body in the axial direction to approach the bottom of the cylindrical body and increasing the spring force of the second spring means, thereby increasing the frictional resistance force. The rotation of the pedal arm is transmitted as relative rotation between the cylindrical body and the rotating body.

[0028] In the eleventh aspect of the vehicle pedal device,
The same effects as those of the vehicle pedal device according to the first to tenth aspects can be obtained.

The pedal arm in the device of the present invention is preferably the above-described accelerator pedal arm, but may be any of a brake pedal arm or a clutch pedal arm.

In the present invention, the rotation of the pedal arm may be transmitted to either the cylindrical body or the rotating body, but is preferably transmitted to the rotating body. In this case, the cylindrical body is fixedly supported by the frame, and when the rotation of the pedal arm is transmitted to the cylindrical body, the rotating body is fixedly supported by the frame.

The damper of the present invention is suitable for use in the apparatus according to any one of the above-described embodiments, and is basically arranged so as to be movable in the axial direction and immovable in the direction around the axis. A movable body, a rotating body facing the movable body and relatively rotatable around an axis, spring means for elastically urging the movable body toward the rotating body, and A frictional resistance force is generated as a resistance force, and the movable body is separated from the rotating body in the axial direction against the elastic force of the spring means to increase the spring force of the spring means, thereby increasing the friction resistance force. And a frictional resistance generating means.

In still another embodiment, the damper of the present invention basically includes a bottomed cylindrical body, and is provided inside the cylindrical body so as to be movable in the axial direction with respect to the cylindrical body and to rotate around the axis. In the direction, a movable body that is immovably arranged, one end of the movable body, a spring means disposed between the movable body and the bottom of the cylindrical body with one end abutting on the movable body, and the other end facing the movable body. A rotating body rotatably arranged around the axis with respect to the cylindrical body, and a frictional force generated as the resistance force in the rotation of the rotating body, and a movable body against the elastic force of the spring means. Frictional force generating means for increasing the frictional resistance force by increasing the spring force of the spring means by causing the spring means to move away from the rotating body in the axial direction to approach the bottom of the cylindrical body.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention and its embodiments will be described with reference to preferred examples shown in the drawings. The present invention is not limited to these examples.

Referring to FIGS. 1 to 10, an automobile pedal apparatus 1 according to the present embodiment includes a support frame 2 and a pedal arm supported by the support frame 2 so as to be rotatable in an R direction about an axis A. , An accelerator pedal arm 3, a spring means 4 for urging the accelerator pedal arm 3 to the initial rotation position, a damper 5 for applying a resistance to the rotation of the accelerator pedal arm 3 in the R direction, and an accelerator pedal arm 3 is provided with a stopper (not shown) for stopping the rotation at the initial rotation position.

The support frame 2 is fixed to the vehicle body 11 with a bottom plate 13 by rivets or bolts 12 and the like, and rotatably supports the rotating shaft 14 on both side walls 15 and 19.

The accelerator pedal arm 3 has an accelerator pedal (not shown) at its tip, is fixed to a rotating shaft 14, and is rotatable in the R direction to the support frame 2 via the rotating shaft 14. Supported.

The spring means 4 in this example comprises a coil spring, particularly preferably a torsion coil spring 16, and one end 17.
Engages with the side wall portion 15 of the support frame 2 and the other end portion 18 engages with the accelerator pedal arm 3, so that the accelerator pedal arm 3 is always elastically attached in the counterclockwise direction in the R direction in FIG. I'm going. Instead of the torsion coil spring 16, the spring means 4 may be a compression spring, especially a compression coil spring.

The damper 5 is provided on the side wall 15 of the support frame 2.
A cylindrical body 22 with a bottom fixed by bolts 21 or the like;
An annular plate-shaped movable body 23 which is movable in the direction of the axis A with respect to the cylindrical body 22 and is immovable in the direction around the axis A, that is, in the R direction; 2
A coil spring 4 is provided between the movable body 23 and the bottom 25 of the cylindrical body 22 by contacting the bottom 4 with the bottom 25 of the cylindrical body 22 and the other end 26 with the movable body 23, particularly preferably a compression coil. A spring 27 and a rotating body 2 disposed in the cylindrical body 22 so as to face the movable body 23 as a movable spring receiver and to be rotatable about the axis A in the R direction with respect to the cylindrical body 22.
8 and a frictional resistance force as the resistance force in the rotation of the rotating body 28 in the R direction, and the movable body 23 is separated from the rotating body 28 in the axial direction against the elastic force of the coil spring 27 so that the cylindrical body A frictional resistance generating means 29 for increasing the frictional resistance by increasing the spring reaction force of the coil spring 27 by approaching the bottom 25 of the coil spring 22 is provided.

The bottomed cylindrical body 22 of the present example has a cylindrical portion 31.
And a flange portion 32 integrally formed on one end surface of the cylindrical portion 31
And a cover 36 serving as a fixed spring receiver fixed to the other end 35 of the cylindrical portion 31 by being screwed to a screw portion 34 formed on the inner peripheral surface 33 of the cylindrical portion 31.

The cylindrical portion 31 has, on its inner peripheral surface 33, at least one, in this example, six grooves 41 (only two shown) extending in the direction of the axis A in addition to the screw portion 34. The grooves 41 are provided at equal angular intervals in the R direction.

The flange 32 having an approximately elliptical outer diameter has a through hole 42 at the center and through holes 43 and 44 at both ends in the longitudinal direction, respectively. 21
The cylindrical body 22 is fixedly supported on the side wall portion 15 at the flange portion 32 by, for example, the above.

The lid 36 serving as the bottom 25 of the cylindrical body 22
The end face 45 has an annular groove 46, the other end face 47 has a hexagonal recess 48 at the center, and the peripheral face 49 has a threaded portion 50.
Is seated on the lid portion 36, and the screw portion 50 is screwed to the screw portion 34 by a rotary jig via the recess 48, and the lid portion 36 is fastened and fixed to the other end portion 35 of the cylindrical portion 31. ing.

The movable body 23 is integrally formed with an annular plate-shaped main body 56 having a through hole 55 at the center and an outer peripheral surface 57 of the main body 56, as shown in detail in FIGS. 5, 6 and 7. At least one, in this example, six protrusions 58 are formed, and an annular groove 60 is provided on a surface 59 facing the one end surface 45 of the lid portion 36. Each protrusion 58 has an equal angle in the R direction. The movable bodies 23 are arranged at intervals and are movably arranged in the direction of the axis A in each groove 41, whereby the movable body 23 is movable in the direction of the axis A and is immovable in the direction R. The other end 26 of the spring 27 is seated on the body 56.

The coil spring 27 is disposed within the cylindrical portion 31 so as to be concentric with the cylindrical portion 31 and elastically compressed so as to separate the movable body 23 from the lid portion 36 in the direction of the axis A.

The rotator 28 is shown in FIG. 8, FIG. 9 and FIG.
As shown in detail in FIG. 1, the cylindrical portion 65 includes an annular plate portion 67 integrally formed on one end portion of an outer peripheral surface 66 of the cylindrical portion 65. The cylindrical portion 65 is disposed in the hole 42 and is rotatably supported in the R direction on the inner peripheral surface 64 of the flange portion 32 that defines the through hole 42.
The other end of the cylindrical member extends through the through hole 55 and slidably contacts the inner peripheral surface 68 of the main body 56 defining the through hole 55 in the directions of the axes A and R. In the portion 65, flat surfaces 70 and 71 facing each other are formed in the central circular hole 69, and one end of the rotating shaft 14 is fitted into the central circular hole 69 defined by the flat surfaces 70 and 71. Thus, the rotation of the pedal arm 3 in the R direction is transmitted to the rotating body 28 via the rotating shaft 14.

It is preferable that the cylindrical portion 65 be formed long so as to penetrate the through hole 55, since the rotation of the rotating body 28 in the R direction can be guided by the inner peripheral surface 68 of the main body 56. The cylindrical portion 65 is formed short without extending to the through hole 55, and the rotation of the rotating body 28 is controlled by the cylindrical portion 31.
May be guided by the inner peripheral surface.

The frictional resistance generating means 29 is provided on the outer peripheral side of the annular surface 82 of the annular plate portion 67 of the rotating body 28 facing the annular surface 81 of the main body 56 of the movable body 23 and is movable in the direction of the axis A. At least one, in this example, three projections 84 projecting toward the surface 81 of the body 23 and having an inclined surface 83 and facing the surface 82 of the annular plate portion 67 of the rotating body 28. An axis A is provided on the outer peripheral side of the surface 81 of the main body 56 of the movable body 23.
At least one, in the present example, three projections 86 integrally formed with an inclined surface 85 projecting toward the surface 82 of the rotating body 28 and in surface contact with the inclined surface 83;
The flange 3 of the cylindrical body 22 is brought into surface contact with the annular surface 87 of the annular plate 67 of the rotating body 28 and the rotatable surface 87.
2 is provided.

The three projections 84 are arranged at equal angular intervals in the R direction on the surface 82 and are integrally formed on the annular plate 67. Similarly, the projections 86 are formed at equal angles in the R direction on the surface 81. Being spaced apart and integrally formed with the body 56, the inclined surfaces 83 and 85 are formed complementary so as to make surface contact with each other and preferably inclined at an inclination of about 45 ° with respect to the axis A. ing.

The surface 81 has a recess 91 into which the tip of each projection 84 in the direction of the axis A falls, and a step 9 defining the recess 91.
2 is formed so as to be connected to the projection 86, and
A recess 93 into which the tip of each projection 86 in the direction of the axis A falls.
And a step 94 defining a recess 93 are formed so as to be connected to the projection 84, and the initial surface contact position between the inclined surface 83 and the inclined surface 85 is defined by the step 92 and the step 94. . In this example, the fixing surface 88 is formed by an annular surface of an annular portion 95 that protrudes radially inward of the flange portion 32.

As described above, the pedal device 1 includes the coil spring 16 as the first spring means for urging the accelerator pedal arm 3 as the pedal arm to the initial rotation position, and the rotation of the accelerator pedal arm 3. A damper 5 for imparting a resistance force, wherein the damper 5 is movable in the direction of the axis A and is fixedly arranged in the direction around the axis A.
A rotating body 28 facing the movable body 23 and relatively rotatable around the axis A; and a coil spring as second spring means for elastically biasing the movable body 23 toward the rotating body 28. 27, the frictional force is generated as the resistance in the relative rotation of the rotating body 28, and the movable body 23 is separated from the rotating body 28 in the direction of the axis A against the elastic force of the coil spring 27. And a frictional resistance generating means 29 for increasing the frictional resistance by increasing the spring force of the rotating member 27 so that the rotation of the accelerator pedal arm 3 is transmitted as the relative rotation of the rotating body 28. Has become.

In a vehicle equipped with the pedal device 1, for example, an automobile, when the accelerator pedal is depressed, the accelerator pedal arm 3 rotates clockwise in the R direction in FIG. 2 against the elastic force of the coil spring 16. Then, the fuel injection to the engine is accelerated and accelerated by an electronic control unit (not shown) including a detector for detecting the rotation angle of the accelerator pedal arm 3, and conversely, when the accelerator pedal is released, the accelerator pedal arm 3 is released. But the coil spring 1
When it is rotated counterclockwise in the R direction in FIG. 2 by the elastic force of 6, the fuel injection to the engine is reduced by an electronic control unit (not shown) and decelerated.

In the pedal device 1, when the rotating body 28 is rotated in the R direction via the rotating shaft 14 by the rotation of the accelerator pedal arm 3 due to depression of the pedal, the projection 84 is also rotated in the R direction, and the projection 84 is rotated. Due to the rotation in the R direction, the movable body 23 integrally having the projection 86 that is in surface contact with the inclined surface 83 on the inclined surface 85 resists the elastic force of the coil spring 27 in the axis A direction as shown in FIG. When the pedal is depressed, the accelerator pedal arm 3 is moved by the elastic force of the coil spring 16.
The movable body 23 is returned to the original position, and similarly, as shown in FIG.

In the pedal device 1, when the pedal is depressed, the frictional resistance between the inclined surface 83 and the inclined surface 85 and the frictional resistance between the surface 87 and the fixed surface 88 pressed against each other by the gradually increasing elastic force of the coil spring 27. The rotation of the accelerator pedal arm 3 based on the depression of the pedal is applied with a gradually increasing resistance (reaction force) as appropriate, so that the accelerator pedal is excessively depressed and fuel is consumed more than necessary. When the pedal is released, the frictional resistance between the inclined surface 83 and the inclined surface 85 and the frictional resistance between the surface 87 and the fixed surface 88 become extremely small, and the accelerator pedal arm 3 is moved by the elastic force of the coil spring 16. It will be quickly returned to the initial position with a small resistance.

In addition, in the pedal device 1, when the pedal is kept depressed at that position after the pedal is depressed,
Even if the pedal depression force is slightly reduced, the frictional resistance between the inclined surface 83 and the inclined surface 85 and the surface 87 and the fixed surface 88
The hysteresis characteristic in the relationship between the pedal depression amount and the pedal depression force based on the frictional resistance of the accelerator pedal arm 3 enables the rotation position of the accelerator pedal arm 3 to be maintained at the pedal depression amount. Inconveniences, such as making it possible, can be eliminated. That is, the pedal device 1
Thus, the range of the pedal depression force that can maintain the rotation position of the accelerator pedal arm 3 at the pedal depression amount at the pedal depression amount can be increased in accordance with the pedal depression amount. The pedal depression amount can be easily maintained constant according to the speed, and inconveniences such as causing early fatigue of the pedal depression foot can be eliminated.

Further, according to the present pedal device 1, the inclined surface 83
The resistance that can be applied to the rotation of the accelerator pedal arm 3 can be determined by the frictional resistance between the accelerator pedal arm 3 and the inclined surface 85 and the frictional resistance between the surface 87 and the fixed surface 88. By setting the respective values as appropriate, the device can be made extremely compact, and can be installed by effectively utilizing a small space.

Further, according to the pedal device 1, the bottom 25 of the cylindrical body 22 is formed by the coil spring 27 because the bottom portion 25 is formed of the lid 36 screwed to the cylindrical portion 31 so as to be adjustable in the direction of the axis A. The initial elastic force, in other words, the initial resistance can be arbitrarily adjusted and set, and an optimum initial resistance can be obtained.

In addition, according to the pedal device 1, since a return force for returning the accelerator pedal arm 3 to the initial position is hardly generated from the coil spring 27, a reaction force is substantially applied to the accelerator pedal arm 3 at a constant speed. There is the further advantage that it does not occur and therefore does not cause premature fatigue of the pedal foot.

In addition, according to the pedal device 1, the coil spring 27 comprises the movable body 23 and the cylindrical body 22 which do not rotate relative to each other.
Is not twisted even when the rotating body 28 rotates, so that there is no inconvenience such as malfunction due to the torsion of the coil spring 27.

In the pedal device 1, the cylindrical body 22
May be fixed to the accelerator pedal arm 3 and the rotating body 28 may be fixed to the support frame 2.

In the pedal device 1 described above, the cylinder 2
The bottom part 25 of the second part is composed of a lid part 36 separate from the cylindrical part 31, and the flange part 32 has a through hole 42 at the center and is formed so as to extend integrally from the cylindrical part 31 radially inward and outward. However, as shown in FIG. 12, the cylindrical portion 31 and the lid portion 36 are integrally formed, and the flange portion 32 having the through holes 43 and 44 is integrally extended only radially outward from the cylindrical portion 31. On the other hand, an annular lid member 96 which is separate from the cylindrical portion 31 and has a through hole 42 in the center is attached to the cylindrical portion 31.
Is fixed to the inner peripheral surface 33 by screwing so as to be adjustable in the direction of the axis A and not to rotate normally.
2, the rotating shaft 14 may be rotatably penetrated, and the annular surface 87 of the annular plate portion 67 of the rotating body 28 may be brought into surface contact with the fixed surface 97 of the flange member 96 whose positioning is adjustable in the direction of the axis A. As shown in FIG. 13, a screw portion 104 formed on the inner peripheral surface 103 of the lid portion 36 is screwed to a screw portion 102 formed on the outer peripheral surface 101 of the cylindrical portion 31, and
May be fixed to the cylindrical portion 31 so as to be positionally adjustable in the direction of the axis A.

Further, in the pedal device 1 described above, the spring means disposed between the movable body 23 and the bottom 25 of the cylindrical body 22 is constituted by a single coil spring 27, which is shown in FIG. The at least two coil springs 111 and 112 are arranged concentrically, and in this at least two coil springs 111 and 112, the elastic coefficient of one of the coil springs 111 is made relatively large, and The coefficient of elasticity of the coil springs 112 is made relatively small to make them different from each other, and a large number of coil springs 112 having a small elastic coefficient but various kinds of elastic coefficients are prepared in advance and appropriately selected from these. It may be used for adjusting the reaction force. In this case, the through hole 55 of the main body 56 of the movable body 23 may be omitted, and the cylindrical portion 65 of the rotating body 28 may be formed shorter in the direction of the axis A so as not to penetrate the main body 56.

Further, in the pedal device 1 described above, the damper 5 is attached to the outer surface of the side wall portion 15, but instead of this, as shown in FIG. The damper 5 may be attached to the inner surface 121 of the 15. In the case of the pedal device 1 shown in FIG. 14, in the damper 5 shown in FIG. 12, a plurality of protrusions 123 protruding in the direction of the axis A on the annular end face 122 of the cylindrical portion 31 instead of the flange 32.
Are integrally formed, and the bottom 2 of the cylindrical body 22 is
5 in which a through-hole 124 is formed can be used. In the case of the pedal device 1 shown in FIG.
The cylindrical body 22 extends through the damper 5 and is rotatably supported by the side walls 15 and 19. The cylindrical body 22 is fixed to the side wall 15 via a protrusion 123 fitted on the side wall 15. I have. By arranging the damper 5 between the side walls 15 and 19 in this manner, the installation space can be extremely reduced,
The pedal device 1 can be installed compactly.

[0063]

According to the present invention, the range of the pedal depression force that can maintain the pedal depression amount constant can be increased in accordance with the pedal depression amount, and the pedal can be installed more compactly than the dummy cable. In addition, it is possible to extremely easily adjust the reaction force having the hysteresis characteristic, and to provide a pedal device with little characteristic change and a damper suitable for use in this pedal device.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an example of a preferred embodiment of the present invention.

FIG. 2 is a side view of the example shown in FIG.

FIG. 3 is a detailed front sectional view of the damper of the example shown in FIG.

FIG. 4 is a right side view of the damper shown in FIG.

FIG. 5 is a left side view of a movable body of the damper shown in FIG. 3;

6 is a sectional view taken along the line VI-VI shown in FIG. 5, in which projections, recesses and steps of the frictional resistance generating means are omitted.

7 (a) is a right side view of the movable body of the damper shown in FIG. 3, and FIG. 7 (b) shows a projection, a recess and a step of a frictional resistance generating means integrally formed with the movable body. FIG.

8 (a) is a left side view of a rotating body of the damper shown in FIG. 3, and FIG. 8 (b) shows a projection, a recess, and a step of a frictional resistance generating means integrally formed with the rotating body. FIG.

FIG. 9 is a right side view of a rotating body of the damper shown in FIG. 3;

FIG. 10 is a cross-sectional view taken along line XX shown in FIG. 9, in which projections, recesses, and steps of the frictional resistance generating means are omitted.

FIG. 11 is an operation explanatory view of the damper of the example shown in FIGS. 1 and 3;

FIG. 12 is a front sectional view of an example of a damper according to another preferred embodiment of the present invention.

FIG. 13 is a front sectional view of an example of a damper according to still another preferred embodiment of the present invention.

FIG. 14 is a front sectional view of an example of a damper according to still another preferred embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Accelerator pedal device of a car 2 Support frame 3 Accelerator pedal arm 4 Spring means 5 Damper 22 Cylindrical body 23 Movable body 25 Bottom 27 Coil spring 28 Rotating body 29 Friction resistance generating means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D037 EA01 EA05 EB01 EB04 EB05 EB16 EB19 EC07 EC08 3J070 AA32 BA11 CA42 CC04 CC07 CD02 CD05 DA02

Claims (19)

[Claims] A first spring means for urging the pedal arm to rotate to an initial rotation position; and a damper for imparting a resistance to the rotation of the pedal arm. A movable body that is movable and is fixed in the direction around the axis, a rotating body that faces the movable body and is relatively rotatable around the axis, and a movable body that is elastically moved toward the rotating body. And a frictional force is generated as the resistance in the relative rotation of the rotating body, and the movable body is axially moved from the rotating body against the elastic force of the second spring means. Frictional force generating means for increasing the frictional force by increasing the spring force of the second spring means by separating them from each other, wherein rotation of the pedal arm is transmitted as relative rotation of the rotating body. A pedal device for a car that is to be used. 2. A frictional resistance generating means includes: a projection integrally formed on one surface of the rotating body facing the movable body, the projection being formed in the axial direction toward the one surface of the movable body; One surface of the movable body facing the rotating body is provided with a projection integrally formed so as to protrude toward the one surface of the rotating body in the axial direction, and the two projections come into surface contact with each other. The vehicle pedal device according to claim 1, wherein 3. The frictional resistance generating means includes an inclined surface formed on one surface of the rotating body facing the movable body and a slope formed on one surface of the movable body facing the rotating body. 3. The pedal device for an automobile according to claim 1, further comprising an inclined surface that makes surface contact. 4. The pedal device for an automobile according to claim 2, wherein the frictional resistance generating means has a fixed surface that is in surface contact with the other surface of the rotating body. 5. The second spring means comprises at least two concentrically arranged coil springs, said at least two coil springs having different elastic moduli. The pedal device for an automobile according to any one of claims 1 to 4. 6. The pedal arm is rotatably supported by a support frame, the damper includes a bottomed cylindrical body having a movable body and a rotating body disposed therein, and a second spring. The means is disposed between the movable body and the bottom of the cylindrical body with one end thereof being in contact with the bottom of the cylindrical body and the other end being in contact with the movable body, and the frictional resistance generating means is provided in the cylindrical body of the rotating body. A frictional resistance is generated as the resistance in the relative rotation with respect to, and the movable body is separated from the rotating body in the axial direction against the elastic force of the second spring means to approach the bottom of the cylindrical body. By increasing the spring force of the second spring means,
The method according to any one of claims 1 to 5, wherein the frictional resistance is increased, and rotation of the pedal arm is transmitted as relative rotation between the cylindrical body and the rotating body. A pedal device for an automobile according to the above. 7. The pedal apparatus for an automobile according to claim 6, wherein the cylindrical body has a fixed surface that comes into surface contact with the rotating body. 8. The pedal device for an automobile according to claim 7, wherein the fixing surface is positionally adjustable in the axial direction. 9. The vehicle pedal device according to claim 6, wherein the bottom of the cylindrical body is adjustable in position in the axial direction. 10. The vehicle pedal device according to claim 1, wherein the pedal arm is an accelerator pedal arm. 11. A pedal arm rotatably supported by a support frame, first spring means for urging the pedal arm to rotate to an initial rotation position, and applying a resistance to the rotation of the pedal arm. And the damper is disposed in the cylindrical body having a bottom, and is movable in the axial direction with respect to the cylindrical body in the cylindrical body, and is immovable in the direction around the axis. A movable body, second spring means disposed between the movable body and the bottom of the cylindrical body, one end of which is in contact with the bottom of the cylindrical body and the other end of which is in contact with the movable body; A rotating body facing the cylinder and relatively rotatable around its axis with respect to the cylinder, and generating a frictional resistance as the resistance in the relative rotation of the rotor with respect to the cylinder,
By moving the movable body away from the rotating body in the axial direction against the elastic force of the second spring means and approaching the bottom of the cylindrical body to increase the spring force of the second spring means, the frictional resistance is increased. Frictional force generating means for increasing the force,
A pedal device for an automobile, wherein rotation of a pedal arm is transmitted as relative rotation between a cylindrical body and a rotating body. 12. A damper for use in a vehicle pedal device according to claim 1. Description: 13. A movable body movable in the axial direction and fixed in the direction around the axis, a rotating body facing the movable body and relatively rotatable around the axis, and a movable body. A spring means for elastically urging the movable body toward the rotating body, and generating a frictional resistance force as the resistance force in the relative rotation of the rotating body, and moving the movable body from the rotating body against the elastic force of the spring means. A frictional force generating means for increasing the frictional resistance force by increasing the spring force of the spring means by separating the springs in the direction. 14. A cylindrical body having a bottom, a movable body disposed inside the cylindrical body, the movable body being movable in the axial direction with respect to the cylindrical body, and being fixed in the direction around the axis, and one end of the movable body. A spring means disposed at the bottom of the body between the movable body and the bottom of the cylindrical body with the other end abutting against the movable body, and a shaft in the cylindrical body facing the movable body and relative to the cylindrical body. A rotating body arranged so as to be rotatable relative to the periphery, and a frictional resistance force is generated as the resistance force in the relative rotation of the rotating body with respect to the cylindrical body, and the movable body is separated from the rotating body against the elastic force of the spring means. A damper comprising: frictional force generating means for increasing the frictional resistance by increasing the spring force of the spring means by moving the spring away from the bottom of the cylindrical body in the axial direction. 15. The damper according to claim 14, wherein the bottom of the cylindrical body is adjustable in position in the axial direction. 16. A frictional resistance generating means includes a projection integrally formed on one surface of the rotating body facing the movable body, the projection being formed in the axial direction and projecting toward the one surface of the movable body. One surface of the movable body facing the rotating body is provided with a projection integrally formed so as to protrude toward the one surface of the rotating body in the axial direction, and the two projections come into surface contact with each other. A damper according to any one of claims 13 to 15, wherein the damper is adapted to: 17. A frictional resistance generating means includes an inclined surface formed on one surface of the rotating body facing the movable body and a slope formed on one surface of the movable body facing the rotating body. The damper according to any one of claims 13 to 16, comprising a slope that comes into surface contact. 18. The damper according to claim 16, wherein the frictional resistance generating means has a fixed surface that comes into surface contact with the other surface of the rotating body. 19. The damper according to claim 18, wherein the fixing surface is positionally adjustable in the axial direction.