JP4419230B2 - Automotive pedal device and damper suitable for the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pedal device including a damper that applies appropriate 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]
[Problems to be solved by the invention]
In order to reduce fuel consumption and reduce carbon dioxide in automobiles, it is necessary to finely control the fuel injection of automobile engines. Along with this, it is practical to electronically adjust the throttle valve opening by depressing the accelerator pedal. Has been.
[0003]
In an automobile in which the fuel injection of the engine is electronically controlled, the accelerator wire arranged between the accelerator pedal arm and the throttle valve is usually omitted, but in this accelerator wireless automobile, compared to an automobile with an accelerator wire, A loop with a substantially narrow hysteresis characteristic in relation to pedal depression amount (accelerator pedal arm rotation angle) and pedal depression force in addition to different reaction force against pedal depression force, in other words, pedal depression force characteristic with respect to pedal depression amount Therefore, when a general driver who is accustomed to a car with an accelerator wire drives an accelerator wireless car, the driver depresses the pedal too much and consumes more fuel than before. There is a risk that it may be difficult to keep the pedal depression amount constant during traveling.
[0004]
In order to obtain a large reaction force against the pedal depressing force and prevent excessive depression, simply increasing the spring force of the return spring that returns the pedal arm to the initial rotation position will result in a large reaction from the return spring during constant speed driving. There is a risk of premature fatigue of the pedal foot by force.
[0005]
Instead of using a return spring with such a large spring force, when adding a damper that can obtain hysteresis characteristics equivalent to that of an accelerator wire to the pedal arm, the addition of such a damper also releases the pedal depression. Later, it is required that the pedal arm is surely returned to the initial rotation position.
[0006]
The present invention has been made in view of the above points, and the object of the present invention is to increase the range of the pedal depression force that can keep the pedal depression amount constant according to the pedal depression amount, An object of the present invention is to provide a pedal device for an automobile equipped with a damper capable of reliably returning the pedal arm to the initial rotation position after releasing the pedal, and a damper suitable for use in the pedal device.
[0007]
[Means for Solving the Problems]
The pedal device for an automobile according to the first aspect of the present invention includes a damper that imparts a resistance force that gradually increases to the rotation of the pedal arm. The damper includes a damper body and a direction around an axis of the damper body. Then, a non-moving non-moving body, a non-moving non-moving body facing the non-moving body, and a rotating body that is in contact with the damper main body so as to be slidable and rotatable around the shaft, and to which rotation of the pedal arm is transmitted, Frictional force generating means for generating a frictional resistance force that gradually increases as the resistance force during rotation of the body, and the frictional resistance force generating means is formed on one surface of the rotating body facing the non-moving body. An inclined surface formed on one surface of the non-moving body facing the rotating body and in surface contact with the inclined surface, and a damper main body and the rotating body are slidably rotatable on each other. Both inclined surfaces are aligned in the direction perpendicular to the axial direction. As Rusono inclination angle becomes larger than the sum of the friction angle in the friction angle and both inclined surface in sliding rotatable surfaces between the damper body and the rotor are formed.
[0008]
According to the pedal device of the first aspect, since the frictional resistance generating means for generating the frictional resistance force that gradually increases in the rotation of the rotating body is provided, the pedal depression amount is set according to the pedal depression amount. The range of pedaling force that can be maintained constant can be increased. In other words, according to the pedal device of the first aspect, when the rotating body is rotated by the rotation of the pedal arm by depressing the pedal, a frictional resistance force that increases in the frictional resistance generating means is generated. For example, it is possible to eliminate excessive fuel consumption by pushing the accelerator pedal too much with force, and the range of pedal depression force that can maintain the pedal arm turning angle constant according to the pedal depression amount As a result, the pedal depression amount can be easily maintained constant according to the speed when traveling at a constant speed from low speed to high speed, and inconveniences such as premature fatigue on the pedal foot can be eliminated.
[0009]
Moreover, in the pedal device according to the first aspect, the both inclined surface angles of the frictional resistance generating means are larger than the sum of the friction angle on the sliding rotatable surface and the friction angle on both inclined surfaces. Therefore, as will be described later, the force that rotates the rotating body toward the initial rotation position after the pedal depression is released can always be generated by overcoming the friction. It is possible to reliably return to the moving position.
[0010]
In automobiles and the like, it is required to have two or more energy sources for returning the pedal arm to the initial rotation position. The damper of the pedal device of the first aspect is as described above. Since the force to rotate the rotating body toward the initial rotation position after the pedal depression can be overcome and always generated by friction, it functions as an energy source for returning the pedal arm to the initial rotation position. Thus, according to the pedal device of the first aspect with respect to such a requirement, one energy source can be omitted, and the cost can be greatly reduced and the periphery of the pedal arm can be made compact.
[0011]
In the pedal device for an automobile according to the second aspect of the present invention, in the pedal device according to the first aspect, the non-moving body is movable in the axial direction, and the frictional resistance generating means moves the non-moving body toward the rotating body. In the pedal device for an automobile according to the third aspect of the present invention, the non-moving body includes a non-moving body main body, and a non-moving body main body. One surface of the non-moving body main body is provided with a protrusion formed integrally with the axial direction and projecting toward one surface of the rotating body. The rotating body includes the rotating body main body and the rotation body. One surface of the body main body is provided with a protrusion that is integrally formed so as to protrude in the axial direction toward one surface of the non-moving body, and each of the inclined surfaces is provided on each of the protrusions. Is formed.
[0012]
According to a fourth aspect of the present invention, there is provided a pedal device for an automobile. In the pedal device according to the first aspect, the non-moving body includes a protrusion that protrudes in the axial direction and is integrally formed with the damper body. Comprises a rotating body main body and a movable body that is rotated together with the rotation of the rotating body main body, and the movable body protrudes toward the non-moving body in the axial direction and the movable body main body. And each of the inclined surfaces is formed on each of the two protrusions. In the automobile pedal device according to the fifth aspect of the present invention, the fourth aspect is provided. In this pedal apparatus, the movable body is movable in the axial direction with respect to the rotating body, and the frictional resistance generating means includes spring means for elastically urging the movable body toward the non-moving body. .
[0013]
In the pedal device for an automobile according to the sixth aspect of the present invention, in the pedal device according to any one of the first to fifth aspects, the rotation of the pedal arm is transmitted to the rotating body via the rotatable shaft. It has become.
[0014]
The pedal arm in the device of the present invention is preferably an accelerator pedal arm as in the pedal device of the seventh aspect of the present invention, but instead of this, a brake pedal arm or a clutch pedal arm, etc. Also good.
[0015]
As a material for forming the damper main body, the non-moving body, and the rotating body, it is preferable that the base material is made of a resin and contains a filler. In addition, as a material for forming the damper main body, a metal that can be regarded as a substantially rigid body may be used in some cases.
[0016]
The damper of the present invention basically has a damper main body, a non-moving body arranged immovably in the direction around the axis of the damper main body, and faces the non-moving body, and slides and rotates around the axis of the damper main body. A rotating body that is freely contacted and that transmits the rotation of the pedal arm, and a frictional resistance generating means that generates a frictional resistance that gradually increases in the rotation of the rotating body are provided. The means includes an inclined surface formed on one surface of the rotating body facing the stationary body, an inclined surface formed on one surface of the stationary body facing the rotating body and in surface contact with the inclined surface, and a damper body And both of the inclined surfaces have an inclination angle with respect to a direction perpendicular to the axial direction, and the friction between the damper main body and the rotating body on the sliding rotatable surface. Greater than the sum of the angle and the friction angle on both inclined surfaces As it has been formed.
[0017]
With such a damper, a desired hysteresis characteristic can be obtained, and the preferable characteristic as described above can be obtained by connecting to a rotatable shaft such as an accelerator pedal arm of an automobile.
[0018]
Note that the damper according to the present invention is not limited to that used for a pedal arm of an automobile, and may be used for a mechanism or device that requires the above characteristics.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
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.
[0020]
1 to 9, a pedal device 1 for an automobile of this example includes a support frame 2 and a pedal arm supported by the support frame 2 so as to be rotatable in an R direction around an axis A, which is made of a rigid metal in this example. An accelerator pedal arm 3, a spring means 4 for urging and urging the accelerator pedal arm 3 to an initial rotation position, a damper 5 for imparting a resistance force that gradually increases in the rotation of the accelerator pedal arm 3 in the R direction, The accelerator pedal arm 3 is provided with a stopper (not shown) for stopping the rotation at the initial rotation position.
[0021]
The support frame 2 is fixed to the vehicle body 11 with rivets or bolts 12 or the like at the bottom plate portion 13, and rotatably supports the rotatable shaft 14 at both side wall portions 15 and 19.
[0022]
The accelerator pedal arm 3 has an accelerator pedal (not shown) at the tip and is fixed to one end 20 of the rotatable shaft 14. The accelerator pedal arm 3 rotates around the support frame 2 in the R direction via the rotatable shaft 14. It is supported freely.
[0023]
In this example, the spring means 4 comprises a coil spring, particularly preferably a torsion coil spring 16. One end 17 is engaged with the side wall 15 of the support frame 2, and the other end 18 is engaged with the accelerator pedal arm 3. In FIG. 2, the accelerator pedal arm 3 is always elastically biased counterclockwise in the R direction. The spring means 4 may be a compression spring, particularly a compression coil spring, instead of the torsion coil spring 16.
[0024]
The damper 5 includes a damper main body 22 fixed to the side wall 15 of the support frame 2 with bolts 21 and the like, and the damper main body 22 is movable in the axis A direction with respect to the damper main body 22. An annular plate-like non-moving body 23 accommodated so as to be immovable in the surrounding direction, that is, in the R direction, and the damper main body 22 in the damper main body 22 facing the non-moving body 23 and the annular surface 87 of the damper main body 22. A rotating body 28 which is accommodated in a freely rotating and rotating manner with a friction angle φ1 in the R direction around its axis A on the fixed surface 88, and a frictional resistance which gradually increases as the resistance force when the rotating body 28 rotates in the R direction. Friction resistance generating means 29 for generating a force is provided.
[0025]
The bottomed damper main body 22 of this example includes a cylindrical portion 31, a bottom portion 25 as a fixed spring receiver integrally formed on one end surface of the cylindrical portion 31, and a radial direction integrally with the other end surface of the cylindrical portion 31. The flange 32 formed to extend outward and the threaded portion formed on the inner peripheral surface 33 of the other end surface of the cylindrical portion 31 are screwed together and fixed to the one end surface side of the cylindrical portion 31, And a lid 30 that is immovably arranged in the direction around A and in the direction of the axis A.
[0026]
The cylindrical portion 31 includes at least one groove 41 extending in the direction of the axis A on the inner peripheral surface 33, in this example, six grooves 41, and the grooves 41 are equiangularly spaced in the R direction. It is arranged.
[0027]
An annular groove 46 is formed on one end face 45 of the bottom portion 25, and one end 24 of the coil spring 27 is seated in the groove 46.
[0028]
The flange portion 32 having an approximately oval outer diameter has through holes 43 and 44 at both ends in the major axis direction, respectively, and the damper main body 22 at the flange portion 32 by bolts 21 and the like passing through the through holes 43 and 44. Is fixedly supported on the side wall 15.
[0029]
The rotatable shaft 14 passes through the through hole 64 in the center of the lid 30 so as to be rotatable, and a fixed surface 88 which is one surface of the lid 30 has an annular surface of the rotary body 67 described later. 87 is slidably rotatable in the direction around the axis A and is in contact with being biased by the spring force of the coil spring 27. Note that the initial compression state of the coil spring 27 can be changed by changing the screwed state of the lid 30 into the cylindrical portion 31, whereby the initial resistance force can be arbitrarily adjusted and set, and the optimum initial resistance force can be set. Can be obtained.
[0030]
As shown in detail in FIGS. 4, 5, and 6, the non-moving body 23 is integrated with an annular plate-like non-moving body main body 56 having a through hole 55 in the center and an outer peripheral surface 57 of the non-moving body main body 56. At least one, in this example, six projections 58, an annular groove 60 formed in the surface 59 facing the one end surface 45 of the bottom 25, and a surface 81 facing the surface 82 of the rotating body 67. At least one protrusion, which is integrally formed so as to protrude toward the surface 82 of the rotating body main body 67 in the axis A direction, and in this example, three protrusions 86 and a step portion 92 connected to the protrusion 86. The projections 58 are arranged at equal angular intervals in the R direction and are movably arranged in the axis A direction in the grooves 41. Thus, the non-moving body 23 is movable in the direction of the axis A and is not moved in the R direction. The protrusions 58 are slidably contacted with the cylindrical body 31 of the damper main body 22 with a friction angle φ3 in the direction of the axis A, and the protrusions 86 are arranged at equal angular intervals in the R direction. The other end 26 of the spring 27 is seated on the non-moving body main body 56.
[0031]
As shown in detail in FIGS. 7, 8, and 9, the rotating body 28 is an annular plate-like rotation integrally formed on the cylindrical portion 65 and one end side of the outer peripheral surface 66 of the cylindrical portion 65. At least one formed integrally with the body main body 67 and the annular surface 82 of the rotating body main body 67 so as to protrude in the direction of the axis A and toward the surface 81 of the non-moving body main body 56, in this example 3 Each of the projections 84 and a recess 93 formed in the surface 82 that defines a stepped portion 94 connected to the projection 84, and one end side of the cylindrical portion 65 is formed in the through hole 64 of the lid 30. The other end side of the cylindrical portion 65 passes through the through hole 55 and passes through the through hole 55, and is supported on the inner peripheral surface of the lid body 30 that defines the through hole 64. The inner peripheral surface 68 of the non-moving body 56 that defines The other end portion 70 of the rotatable shaft 14 in the center hole 69 of the cylindrical portion 65 is fixedly inserted, each projection 84 is arranged at equal angular intervals in the R direction.
[0032]
In addition, it is preferable to form the cylindrical portion 65 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 non-moving body main body 56. The cylindrical portion 65 may be formed short without extending to the hole 55, and the rotation of the rotating body 28 may be guided by the inner peripheral surface of the lid body 30 that defines the through hole 64.
[0033]
The frictional resistance generating means 29 has an inclined surface 83 having an inclination angle θ with respect to a direction orthogonal to the axis A direction formed on each of the protrusions 84, and a friction angle φ2 in the rotation direction around the axis A. And an inclined surface 85 formed on each of the protrusions 86 in surface contact with the inclined surface 83 and having an inclination angle θ with respect to a direction orthogonal to the axis A direction, similar to the inclined surface 83, and a damper. A surface 87 and a fixed surface 88 which are mutually slidable and rotatable surfaces of the main body 22 and the rotating body 28 and have a friction angle φ1, and a friction angle φ3 in the direction of the axis A of the projection 58 and the cylindrical portion 31 in the groove 41. And a coil spring as a spring means for elastically biasing the non-moving body 23 toward the rotating body 28, particularly preferably a compression coil spring 27.
[0034]
The inclined surfaces 83 and 85 are complementarily formed so as to be in surface contact with each other, and the tips of the projections 84 in the direction of the axis A drop into the recesses 91, and the shafts of the projections 86 fall into the recesses 93. The tip end in the A direction falls, and thus the initial surface contact position between the inclined surface 83 and the inclined surface 85 is defined by the step portion 92 and the step portion 94.
[0035]
The inclined surfaces 83 and 85 cause the non-moving body 23 to move away from the rotating body 28 in the axial direction against the elastic force of the coil spring 27 to approach the bottom 25 of the damper main body 22, thereby reducing the spring reaction force of the coil spring 27. By increasing the friction resistance, the frictional resistance is increased, and the inclination angle θ is larger than the sum of the friction angle φ1 at the surface 87 and the fixed surface 88 and the friction angle φ2 at both the inclined surfaces 83 and 85. It is formed to be large.
[0036]
The coil spring 27 disposed concentrically with the cylindrical portion 31 in the cylindrical portion 31 has one end 24 in contact with the bottom 25 of the damper main body 22 and the other end 26 in contact with the non-moving body main body 56. The elastic member is elastically shrunk so as to be separated from the bottom portion 25 in the axis A direction, and is disposed between the non-moving body main body 56 and the bottom portion 25 of the damper main body 22.
[0037]
In a vehicle equipped with the above pedal device 1, for example, an automobile, the accelerator pedal arm 3 is rotated in the clockwise direction in the R direction in FIG. 2 against the elastic force of the coil spring 16 when the accelerator pedal is depressed. Then, fuel injection to the engine is accelerated and accelerated by an electronic control unit (not shown) including a detector that detects the rotation angle of the accelerator pedal arm 3, and conversely, when the accelerator pedal is released, the accelerator pedal arm 3 is When the coil spring 16 is rotated counterclockwise in the R direction in FIG. 2 by the elastic force of the coil spring 16, fuel injection to the engine is reduced and decelerated by an electronic control device (not shown).
[0038]
In the pedal device 1, when the rotating body 28 is rotated in the R direction by the rotation of the accelerator pedal arm 3 by the depression of the accelerator pedal, the protrusion 84 is also rotated in the R direction, and the rotation of the protrusion 84 in the R direction As shown in FIG. 11, the non-moving body 23 having the protrusion 86 in surface contact with the inclined surface 83 by the inclined surface 85 is moved toward the bottom 25 against the elastic force of the coil spring 27 in the axis A direction. On the contrary, when the depression of the pedal is released, the accelerator pedal arm 3 is returned to the original position 0 ° by the elastic force of the coil spring 16, and similarly, the non-moving body 23 is moved to the original position as shown in FIG. Returned to
[0039]
In the pedal device 1, when the accelerator pedal is depressed by a certain amount and the accelerator pedal arm 3 is held at the rotation position, the elasticity of the coil spring 27 that presses the non-moving body 23 toward the rotating body 28. A relationship of F = W · sin (φ1 + φ2-θ) · cos (φ3) / {cos (φ2 + φ3-θ) · cos (φ1)} is established between the force W and the force F that rotates the rotating body 28. However, as described above, both the inclined surfaces 83 are set so that the inclination angle θ is larger than the sum of the friction angle φ1 of the sliding rotatable surfaces 87 and 88 and the friction angle φ2 of the both inclined surfaces 83 and 85. And 85 are formed, the force F is always a negative value. As a result, the rotating body 28 is always rotated in the direction of the original initial rotation position by the elastic force W. After stepping off The force for rotating the rotating body 28 toward the initial rotation position can be constantly generated by overcoming the friction, and the accelerator pedal arm 3 can be reliably returned to the initial rotation position after the depression of the pedal.
[0040]
In the pedal device 1, the frictional resistance between the inclined surface 83 and the inclined surface 85 pressed against each other by the gradually increasing elastic force of the coil spring 27, the frictional resistance between the surface 87 and the fixed surface 88, and the protrusion 58 in the groove 41. As shown by line bc in FIG. 10, an appropriate gradually increasing resistance force (reaction force) is applied to the rotation of the accelerator pedal arm 3 based on the depression of the pedal, due to the frictional resistance between the cylinder portion 31 and the cylinder portion 31. Thus, it is possible to eliminate the situation where the accelerator pedal is depressed too much and consumes fuel more than necessary. In addition, when the pedal depression is released at the angle αef °, the accelerator pedal arm 3 is small due to the elastic force of the coil spring 16. The rotation is returned to the initial position at an early stage with resistance.
[0041]
In addition, in the pedal device 1, after the pedal is depressed, for example, when the pedal depression is maintained at an angle αef ° corresponding to steady running, as shown in FIG. 10, even if the pedal depression force is decreased from Te to Tf, The pedal arm rotation angle and the pedal depression force based on the friction resistance between the inclined surface 83 and the inclined surface 85, the friction resistance between the surface 87 and the fixed surface 88, and the friction resistance between the projection 58 in the groove 41 and the cylindrical portion 31 Since the rotation angle αef ° of the accelerator pedal arm 3 can be maintained by the hysteresis characteristic ab-ef, the inconvenience of causing early fatigue on the pedal foot can be eliminated. That is, in the pedal device 1, the range Te−Tf of the pedal depression force T that can keep the turning angle αef ° of the accelerator pedal arm 3 at the pedal depression amount constant according to the pedal depression amount can be increased. When the vehicle is traveling at a constant speed at each speed, the pedal depression amount can be easily maintained constant according to the speed, and inconveniences such as premature fatigue of the pedal foot can be eliminated.
[0042]
Further, according to the pedal device 1, the accelerator pedal arm is roughly determined by the frictional resistance between the inclined surface 83 and the inclined surface 85, the frictional resistance between the surface 87 and the fixed surface 88, and the frictional resistance between the projection 58 in the groove 41 and the cylindrical portion 31. Since the resistance force that can be applied to the rotation of 3 can be determined, reaction force adjustment with hysteresis characteristics can be performed very easily, and furthermore, each value can be set appropriately to make it extremely compact. It can be installed using a small space effectively.
[0043]
By the way, in the damper 5 of the pedal device 1 described above, the non-moving body 23 is movable in the direction of the axis A, but instead, the non-moving body 103 is moved in the direction of the axis A as in the damper 101 shown in FIG. May also be fixed.
[0044]
That is, the damper 101 shown in FIG. 12 includes a damper main body 102 fixed to the side wall portion 15 of the support frame 2 by bolts 21 and the like, and the damper main body 102 has an axis A direction and an axis A in the damper main body 102. The non-moving body 103 immovably arranged in the surrounding R direction, and the non-moving body 103 facing the non-moving body 103 and sliding on the fixed surface 105 of the damper main body 102 around the axis A with the friction angle φ1 in the R direction around the axis A A rotating body 106 that is rotatably contacted, and a frictional resistance generating means 107 that generates a frictional resistance that gradually increases as a resistance when the rotating body 106 rotates in the R direction are provided.
[0045]
The damper main body 102 is formed integrally with the cylindrical portion 111, a flange portion 112 formed integrally with one end surface of the cylindrical portion 111, and an inner peripheral surface 113 of the cylindrical portion 111 so as to protrude radially inward. And an annular plate portion 113. Like the flange portion 32, the flange portion 112 has through holes 114 and 115 at both ends in the major axis direction, respectively, and the damper main body 102 at the flange portion 112 by the bolts 21 and the like passing through the through holes 114 and 115. Is fixed to and supported by the side wall portion 15 like the damper main body 22, and a cylindrical portion 133 of the rotating body main body 116 described later is rotatably inserted into the central through hole of the annular plate portion 113. It is like that.
[0046]
The non-moving body 103 includes three protrusions 121 that are integrally formed so as to protrude in the direction of the axis A on one surface 117 of the annular plate portion 113 of the damper main body 102. The non-moving body 103 is immovable in the axis A direction and the R direction. Similar to the protrusion 86, the protrusions 121 are arranged at equal angular intervals in the R direction on one surface 117 of the annular plate portion 113.
[0047]
The rotator 106 includes a rotator main body 116 and a movable body 132 that is movable in the direction of the axis A with respect to the rotator main body 116 and rotated together with the rotation of the rotator main body 116 in the R direction.
[0048]
The rotating body main body 116 has a cylindrical portion 133, a flange portion 134 integrally formed in one end of the cylindrical portion 133 in the radial direction, and an outer peripheral surface of one end of the cylindrical portion 133. A bottom cylindrical spring receiver 135.
[0049]
The movable body 132 has a spline protrusion that fits into a spline groove formed on the outer peripheral surface of the cylindrical portion 133, and is slidable in the direction of the axis A with a friction angle φ 3 by this spline coupling, and the cylindrical portion 133. The movable body main body 136 mounted on the outer peripheral surface of the cylindrical portion 133 and the movable body main body projecting toward the projection 121 that is the non-moving body 103 in the axis A direction so as to be rotated together with the rotation in the R direction. Three projections 138 integrally formed on one surface 137 of 136 are provided, and the projection 138 is equiangular in the R direction to one surface 137 of the movable body 136 in the same manner as the projection 84. Arranged at intervals.
[0050]
The other end portion 70 of the rotatable shaft 14 is fixedly inserted into the cylindrical portion 133. The cylindrical portion 133, the flange portion 134 formed integrally with the cylindrical portion 133, and the cylindrical portion Each of the spring receiver 135 fixed to 133 and the movable body main body 136 splined to the cylindrical portion 133 is rotated in the R direction in the same manner as the rotatable shaft 14 rotates in the R direction.
[0051]
The frictional resistance generating means 107 has an inclined surface 141 having an inclination angle θ with respect to a direction orthogonal to the axis A direction formed on each of the protrusions 121 and a friction angle φ2 in the rotation direction around the axis A. And an inclined surface 142 formed on each of the protrusions 138 in surface contact with the inclined surface 141 and having an inclination angle θ with respect to a direction orthogonal to the direction of the axis A in the same manner as the inclined surface 141. The movable body main body with respect to the outer peripheral surface of the cylindrical portion 133 and the surface 104 and the fixed surface 105 having the friction angle φ1 of the flange portion 134 of the body 28 and the annular plate portion 113 of the damper main body 102. 136, an inter-sliding surface having a friction angle φ3 in the axis A direction in spline coupling 136, and a compression coil spring 145 that elastically biases the movable body main body 136 toward the non-moving body 103. Like the inclined surfaces 83 and 85, the inclined surfaces 141 and 142 are complementarily formed so as to be in surface contact with each other, and the compression coil spring 145 includes a movable body main body 136 and a bottom 131 of the spring receiving body 135. Arranged in between.
[0052]
The inclined surfaces 141 and 142 move the movable body main body 136 away from the non-moving body 103 in the direction of the axis A against the elastic force of the coil spring 145 so as to approach the bottom 131 of the spring receiving body 135, and the spring of the coil spring 145. By increasing the reaction force, the frictional resistance force is increased, and the inclination angle θ between the friction angle φ1 at the surface 104 and the fixed surface 105 and the friction angle φ2 at both the inclined surfaces 141 and 142 is increased. It is formed to be larger than the sum.
[0053]
Even in the pedal device 1 provided with the damper 101 described above, when the rotating body 116 is rotated in the R direction by the rotation of the accelerator pedal arm 3 by the depression of the accelerator pedal, the protrusion 138 is also rotated in the R direction. As shown in FIG. 13, the movable body main body 136 having the protrusion 138 in surface contact with the inclined surface 141 by the inclined surface 142 resists the elastic force of the coil spring 145 in the axis A direction. When it is moved toward the bottom 131 of the spring receiving body 135 and the pedal depression is released, the accelerator pedal arm 3 is returned to the original position 0 ° by the elastic force of the coil spring 145, and the movable body is similarly moved. The main body 136 is returned to the original position as shown in FIG.
[0054]
In the pedal device 1 including the damper 101, the inclination angle θ is larger than the sum of the friction angle φ1 on the surface 104 and the fixed surface 105 and the friction angle φ2 on both the inclined surfaces 141 and 142 as described above. In addition, since both the inclined surfaces 141 and 142 are formed, the force F is always a negative value, and the rotating body 116 is always rotated in the direction of the original initial rotation position by the elastic force W of the coil spring 145. Thus, the force for rotating the rotating body 116 toward the initial rotation position after releasing the pedal depression can always be generated by overcoming the friction, and the accelerator pedal arm 3 is initially rotated after the pedal depression is released. It is possible to reliably return to the position.
[0055]
According to the pedal device 1 provided with the damper 5 or 101, the coil spring 27 or 145 is provided between the non-moving body 23 and the bottom 25 of the damper main body 22 that do not rotate relative to each other or between the movable body main body 136 and the spring receiver. Since it is arranged between the bottom 131 of 135, it is not twisted even when the rotating body 28 or 116 is rotated, and thus inconvenience such as malfunction due to the twist of the coil spring 27 or 145 occurs. There is no.
[0056]
【The invention's effect】
According to the present invention, according to the pedal depression amount, the range of the pedal depression force that can keep the pedal depression amount constant can be increased, and the pedal arm is reliably returned to the initial rotation position after the pedal depression is released. It is possible to provide a damper device suitable for use in a pedal device of an automobile equipped with a damper capable of being used.
[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 left side view of the example shown in FIG.
FIG. 3 is a right side view of the damper shown in FIG. 1;
4 is a left side view of the non-moving body in the example shown in FIG. 1. FIG.
5 is a cross-sectional view taken along the line IV-IV of the non-moving body shown in FIG.
6A is a right side view of the non-moving body of the example shown in FIG. 1, and FIG. 6B is an explanatory view showing the protrusions, recesses and stepped portions of the non-moving body in an expanded manner.
7A is a left side view of the rotating body of the example shown in FIG. 1, and FIG. 7B is an explanatory view showing the protrusions, recesses, and steps of the rotating body in an expanded manner.
8 is a right side view of the rotating body of the example shown in FIG.
9 is an explanatory diagram of a relationship between a cross section taken along line IX-IX of the rotating body of the example shown in FIG. 8 and a rotatable shaft.
10 is a relationship diagram between the pedal arm rotation angle and the pedal depression force in the example shown in FIG. 1;
11 is an operation explanatory diagram of the damper of the example shown in FIG. 1. FIG.
FIG. 12 is a front sectional view of another example of the preferred embodiment of the present invention.
13 is an operation explanatory diagram of the example shown in FIG.
[Explanation of symbols]
1 Automobile accelerator pedal device
3 Accelerator pedal arm
5 Damper
22 Damper body
23 Unmoving object
27 Coil spring
28 Rotating body
29 Friction resistance generating means

Claims (13)

The damper is provided with a damper that gives a gradually increasing resistance force to the rotation of the pedal arm. The damper includes a damper body, an unmoving body that is immovably arranged in a direction around the axis of the damper body, and the unmoving body. A rotating body that faces the damper body so as to be slidable and rotatable around the shaft, and a frictional resistance force that gradually increases as the resistance force in the rotation of the rotating body. A frictional resistance generating means for generating a frictional force, wherein the frictional resistance generating means includes an inclined surface formed on one surface of the rotating body facing the non-moving body and one of the non-moving bodies facing the rotating body. An inclined surface that is in surface contact with the inclined surface, and a slidably rotatable surface of the damper body and the rotating body, both inclined surfaces with respect to a direction orthogonal to the axial direction. The inclination angle is between the damper body and the rotating body. To be larger than the sum of the friction angle in the friction angle and both inclined surface in kinematic rotatable surface, automobile pedal device being formed. The automobile pedal device according to claim 1, wherein the non-moving body is movable in the axial direction, and the frictional resistance generating means includes spring means for elastically biasing the non-moving body toward the rotating body. . The non-moving body includes a non-moving body main body and a protrusion integrally formed on one surface of the non-moving body main body so as to protrude in the axial direction toward one surface of the rotating body. The body includes a rotating body main body and a protrusion formed integrally on one surface of the rotating body main body so as to protrude in the axial direction toward one surface of the non-moving body. The pedal device for an automobile according to claim 1, wherein each of the surfaces is formed on each of both protrusions. The non-moving body includes a protrusion that protrudes in the axial direction and is integrally formed with the damper main body. The rotating body includes a rotating body main body and a movable body that is rotated along with the rotation of the rotating body main body. The movable body includes a movable body main body and a protrusion that is axially projected toward the non-moving body and is integrally formed with the movable body main body. The automobile pedal device according to claim 1, wherein the pedal device is formed on each of the protrusions. The movable body is movable in the axial direction relative to the rotating body, and the frictional resistance generating means includes spring means for elastically urging the movable body toward the non-moving body. Automobile pedal equipment. The pedal device for an automobile according to any one of claims 1 to 5, wherein the rotation of the pedal arm is transmitted to the rotating body via a rotatable shaft. The pedal device for an automobile according to any one of claims 1 to 6, wherein the pedal arm is an accelerator pedal arm. The damper for using for the pedal apparatus of the motor vehicle as described in any one of Claim 1 to 7. The damper main body, the non-moving body arranged immovably in the direction around the axis of the damper main body, and the non-moving body facing the non-moving body and in contact with the damper main body so as to be slidable and rotatable around the axis. The rotating body is provided with a rotating body to which rotation is transmitted, and friction resistance force generating means for generating a friction resistance force that gradually increases in the rotation of the rotating body. The friction resistance force generating means is a rotating body facing the non-moving body. An inclined surface formed on one of the surfaces, an inclined surface formed on one surface of the stationary body facing the rotating body and in surface contact with the inclined surface, and the damper main body and the rotating body are slidably rotatable with respect to each other The two inclined surfaces have an inclination angle with respect to a direction orthogonal to the axial direction of the friction angle on the sliding rotatable surface between the damper body and the rotating body and the friction angle on both inclined surfaces. Dan that is formed to be larger than the sum . The damper according to claim 9, wherein the non-moving body is movable in the axial direction, and the frictional resistance generating means includes spring means for elastically urging the non-moving body toward the rotating body. The non-moving body includes a non-moving body main body and a protrusion integrally formed on one surface of the non-moving body main body so as to protrude in the axial direction toward one surface of the rotating body. The body includes a rotating body main body and a protrusion formed integrally on one surface of the rotating body main body so as to protrude in the axial direction toward one surface of the non-moving body. The damper according to claim 9 or 10, wherein each of the surfaces is formed on each of both protrusions. The non-moving body includes a protrusion that protrudes in the axial direction and is integrally formed with the damper main body. The rotating body includes a rotating body main body and a movable body that is rotated along with the rotation of the rotating body main body. The movable body includes a movable body main body and a protrusion that is axially projected toward the non-moving body and is integrally formed with the movable body main body. The damper according to claim 9, wherein the damper is formed on each of the protrusions. The movable body is movable in the axial direction with respect to the rotating body, and the frictional resistance generating means includes spring means for elastically biasing the movable body toward the non-moving body. Damper.

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