JP2002079844A - Accelerator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install a part for applying stepping force hysteresis to an accelerator pedal, and to always secure stable operation. SOLUTION: This accelerator device basically comprises an accelerator arm 12 provided with the accelerator pedal 11, a support case 13 containing an arm base end part 12a and rotatably supported via a support shaft 14, return springs 16 and 17 for energizing a rotational movement of the arm 12 in the return direction for returning the pedal 11 to a return position and an accelerator sensor 15 for detecting a rotational movement quantity of the arm 12 as accelerator opening. A hysteresis generating mechanism includes a friction piece 20 installed in the arm base end part 12a, and the tip surface 20a abuts to an inside surface 13a of the support case 13. Since the tip surface 20a of the friction piece 20 is pushed against the inside surface 13a, one end of the return springs 16 and 17 is fixed to the friction piece 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator device used for, for example, an electronically controlled throttle device of a vehicle engine. More specifically, the present invention relates to an accelerator device that has a hysteresis in the pedaling force when the accelerator pedal is depressed and when the accelerator pedal is returned in order to improve the operation feeling of the accelerator pedal.

[0002]

2. Description of the Related Art Conventionally, as a device used in a vehicle engine, there is known an electronic control slot device in which an accelerator cable is eliminated. As this type of electronically controlled throttle device, an accelerator device is used in which an accelerator sensor detects a depression amount of an accelerator pedal as an accelerator opening. The throttle opening of the electronic control throttle device is controlled based on the detected accelerator opening.

[0003] As this type of accelerator device, there is an accelerator device having a hysteresis generating mechanism for providing a hysteresis to the pedaling force when the accelerator pedal is depressed and when the accelerator pedal is returned in order to improve the operation feeling of the accelerator pedal. For example, JP-A-7-160348, JP-A-7-180573, JP-A-10-324173, and JP-A-11-235936 disclose an example of an accelerator device including such a mechanism. I have.

The basic structure common to the accelerator devices disclosed in the above publications is a pedal arm or a pedal shaft rotatably supported on a bracket or a housing around a support shaft, and an accelerator provided at one end of the pedal arm or the like. A pedal, an accelerator sensor for detecting the amount of rotation of the accelerator arm or the like as an accelerator opening when the accelerator pedal is depressed, and a return for urging the rotation of the accelerator arm or the like in the return direction to return the accelerator pedal to the return position And a spring.

Here, the apparatus disclosed in Japanese Patent Application Laid-Open No. 7-160348 has a structure in which the one-way bearing provided on the support shaft and the support shaft are integrally rotated via the one-way bearing. A hysteresis generating mechanism including a friction plate for providing frictional resistance is provided.

[0006] The apparatus disclosed in Japanese Patent Application Laid-Open No. 7-180573 is
A hysteresis generating mechanism including a swing plate for providing frictional resistance by making surface contact with the outer periphery of the support shaft and a spring for biasing the plate in contact with the support shaft is provided for the basic configuration. Can be

The device disclosed in Japanese Patent Application Laid-Open No. H10-324173 has a friction member disposed between an accelerator arm or the like and a bracket or the like, and an accelerator arm which presses the friction member in one direction. A hysteresis generating mechanism is provided that includes a spring member abutting on the side and the bracket side. This publication also discloses another example in which a return spring of an accelerator pedal is used, and the friction member is pressed against the bracket when the diameter of the return spring is reduced.

In the device disclosed in Japanese Patent Application Laid-Open No. H11-235936, a hysteresis generating mechanism provided on a bracket corresponding to a free end side of an accelerator arm or the like is provided with respect to the above basic configuration. This mechanism includes a housing that functions as a fixed friction member, a movable friction member that is movably provided inside the housing, and that constantly contacts the housing, and a return spring that urges the movable friction member in a return direction.

[0009]

However, Japanese Patent Application Laid-Open No.
In the hysteresis generating mechanism of each of the conventional devices disclosed in JP-A-160348, JP-A-7-180573 and JP-A-10-324173, in addition to a friction plate, a swing plate or a friction member for generating a frictional force,
A dedicated one-way bearing, a spring or a spring member for urging the friction plate or the like to the mating member has been required. That is, since the hysteresis generating mechanism is composed of at least two members, it is not easy to assemble parts to the basic configuration.

In particular, in the hysteresis generating mechanism disclosed in Japanese Patent Application Laid-Open Nos. 7-160348 and 10-324173, a friction plate and a friction member provided on a spindle are brought into contact with a mating member. Although a frictional force is generated, since the structure is such that the wear powder easily accumulates, the wear powder may be clogged and hysteresis may increase.
Further, in another example of Japanese Patent Application Laid-Open No. 10-324173, the return spring is reduced in diameter when the accelerator lever is rotated, and the friction member is pressed. However, the pressing direction varies with the change in the diameter of the return spring. And the hysteresis is not stable.

On the other hand, in the conventional device disclosed in Japanese Patent Application Laid-Open No. 11-235936, the mountability to the driver's seat is not good because the hysteresis generating mechanism itself is relatively large and protrudes from the bracket. Further, since this mechanism is composed of at least three members including the housing, the movable friction member, and the return spring, there is a problem that the number of parts is large and the labor required for assembling those parts is further increased. .

The present invention has been made in view of the above circumstances, and a first object of the present invention is to make it easy to assemble parts for providing hysteresis to the depression force of an accelerator pedal, and to always perform stable operation. It is an object of the present invention to provide an accelerator device capable of providing a pedaling force hysteresis. A second object of the present invention is to add to the first object,
It is an object of the present invention to provide an accelerator device in which components for imparting pedaling force hysteresis are compactly assembled and basic operation can be ensured even if the components are damaged.

[0013]

According to a first aspect of the present invention, there is provided an accelerator arm having an accelerator pedal provided at a distal end thereof and a base end of the accelerator arm. A support case for rotatably supporting the base end portion via a support shaft, a return spring for urging the rotation of the accelerator arm in a return direction to return the accelerator pedal to the return position, and an accelerator. In an accelerator device including an accelerator sensor for detecting an amount of rotation of an arm as an accelerator opening, a friction piece having a distal end surface attached to a base end of an accelerator arm and abutting against an inner surface of a support case, One end of a return spring is hooked on the friction piece so as to press the distal end face of the friction piece against the inner surface of the support case. By sliding the distal end surface of the friction piece along the inner surface of the support case, and the spirit that so as to impart hysteresis to the tread force when returning the time depression of the accelerator pedal.

According to the structure of the present invention, the pedal pedal is provided with a pedal force hysteresis simply by adding a friction piece to the basic structure including the accelerator pedal, the accelerator arm, the support case, and the return spring. .
Further, the tip surface of the friction piece is constantly pressed against the inner surface of the support case by a biasing force of the return spring with a stable force.

According to a second aspect of the present invention, in the first aspect, the inner surface of the support case has an arc surface centered on the support shaft, and the friction piece has It is intended that the distal end surface slides along an arc surface with rotation of the accelerator arm.

According to the configuration of the present invention, in addition to the operation of the first aspect, when the accelerator arm rotates, the tip end surface of the friction piece slides along the inner side surface forming an arc surface of the support case. Therefore, stable sliding friction can be obtained.

In order to achieve the second object, the invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, a recess is provided at a base end portion of the accelerator arm. It is intended that the friction piece is fitted into the housing recess.

According to the configuration of the present invention, in addition to the function of the first or second aspect of the present invention, since the friction piece is fitted into the housing recess, the protrusion of the friction piece at the base end of the accelerator arm is reduced. Become. Further, even if the friction piece is damaged, the friction piece is received in the accommodation recess.

In order to achieve the second object, the invention according to a fourth aspect is directed to the invention according to the third aspect, wherein the pin provided in the accommodation recess and the friction piece have a pin in the accommodation recess. The gist of the present invention is to have a pivotally supported center and a play provided between the friction piece and the housing recess to allow the friction piece to swing.

According to the configuration of the present invention, in addition to the effect of the third aspect of the invention, the friction piece is allowed to rotate around the pin within the range of play in the housing recess. Therefore, stress deformation of the friction piece due to dimensional tolerance of the friction piece and contact with the support case is allowed within a play range.

In order to achieve the second object, the invention according to claim 5 is characterized in that, in the invention according to claim 3 or 4, the accommodation recess includes a constricted portion, and the friction piece includes a constricted portion. It is intended to include the corresponding outer shape.

According to the structure of the present invention, in addition to the effect of the third or fourth aspect of the present invention, even if the friction piece is broken into two, the one crack is hooked at the constricted portion of the housing recess.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of an accelerator device according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side view of the accelerator device, FIG. 2 is a plan view of the accelerator device, FIG. 3 is a sectional view taken along line 3-3 in FIG. 2, and FIG. 4 is line 4-4 in FIG. The cross-sectional views along the line are respectively shown.

In this embodiment, an accelerator device used for an electronic control throttle device of a vehicle engine will be described. This accelerator device has, as basic components, an accelerator pedal 11 made of resin and an accelerator arm 1 made of resin.
2, a support case 13 made of resin, a support shaft 14 made of metal, an accelerator sensor 15, and a pair of return springs 16 and 17 made of a coil spring made of metal. The accelerator pedal 11 is formed integrally with the tip of the accelerator arm 12. The support case 13 includes a base end portion (hereinafter, referred to as an “arm base end portion”) 12 a of the accelerator arm 12, and rotatably supports the arm base end portion 12 a via a support shaft 14. It is. The accelerator arm 12, together with the accelerator pedal 11, is rotatable between a return position indicated by a solid line in FIG. 1 and a fully open position indicated by a two-dot chain line in FIG. A pair of return springs 1
Reference numerals 6 and 17 are for urging the rotation of the accelerator arm 12 in the return direction to return the accelerator pedal 11 to the return position. The two return springs 16 and 17 can cause the other to function as fail-safe when one of them fails. The accelerator sensor 15 detects the amount of rotation of the accelerator arm 12 as an accelerator opening. The accelerator sensor 15 is fixed in a sensor case 18 formed integrally with the support case 13. At the upper end of the sensor case 18, a socket 18a containing a wiring terminal 19 is provided.

In order to improve the operation feeling of the accelerator pedal 11, a hysteresis is applied to the depression force when the accelerator pedal 11 is depressed and when it is returned. Is provided with a friction piece 20 having a tip end surface 20a that comes into contact with the friction piece 20. In this embodiment, the friction piece 20 having a substantially rectangular parallelepiped shape is made of PBT (polybutylene terephthalate) or POM (polyacetal) containing carbon, which has good slidability as a resin.
And the like. This material has good slidability with respect to other resin members and excellent wear resistance. In this embodiment, an accommodating concave portion 21 is provided on one side surface of the arm base end portion 12a, and the friction piece 20 is fitted into the accommodating concave portion 21.

FIG. 5 shows one side surface of the base end portion 12a of the arm, and FIG. 6 shows one side surface of the friction piece 20. As shown in FIG. 5, a shaft hole 22 through which the support shaft 14 is inserted and a boss 23 surrounding the shaft hole 22 are formed at the center of the arm base end portion 12a. The housing recess 21 extends diametrically above the boss 23. The housing recess 21 is
3 includes a narrow constricted portion 21a. A pin 24 protrudes from the bottom surface of the housing recess 21. In addition, a long hole 25 having an arc shape centering on the boss 23 is formed on the bottom surface of the housing recess 21. The outer periphery of the base end portion 12a of the arm and the long hole 2
A notch 26 is formed at a position adjacent to No. 5. A pair of stoppers 2 is provided on the outer circumference of the arm base end 12a.
7, 28 are projected from different positions. As shown in FIGS. 1 and 3, the first stopper 27 restricts the movement of the accelerator pedal 11 in the return direction at the return position by engaging with the inner wall of the support case 13. The second stopper 28 is capable of abutting on a step 13e formed inside the support case 13 as shown in FIG. When the accelerator pedal 11 is located at the fully open position as shown by a two-dot chain line in FIG. 1, the stopper 28 engages with the stepped portion 13e so that the accelerator pedal 11 in the fully depressed direction is depressed. Restrict movement. One side of the arm base end 12a adjacent to one stopper 28 has the base end 1a.
A long hole 29 extending in the radial direction of 2a is formed.

As shown in FIG. 6, the friction piece 20 has an outer shape corresponding to the shape of the accommodation recess 21 including the constricted portion 21a. That is, the friction piece 20 is
It has a constricted part 20b corresponding to a. The friction piece 20 has a pin hole 20c that is inserted into the pin 24 on the base end side opposite to the distal end surface 20a. On the back side of the friction piece 20, a pair of projections 20d and 20e are formed integrally. With the friction piece 20 fitted in the accommodation recess 21, the pin 2 is inserted into the pin hole 20c.
4 are inserted, and each of the projections 20d and 20e is disposed in the notch 26 and the elongated hole 25, respectively. In this state,
The distal end surface 20a of the friction piece 20 is
In order to press against 3a, each projection 20d, 20e has
As shown in FIG. 3, one ends of the return springs 16 and 17 are respectively latched. The other end of each return spring 16, 17 is
As shown in FIG. 3, the step 1 formed on the support case 13
3b. In this housing state, the friction piece 20 is supported in the housing recess 21 so as to be rotatable about the pin 24. A predetermined play 30 is provided between the friction piece 20 and the side wall of the housing recess 21 to allow the friction piece 20 to swing.

As shown in FIG. 3, the inner surface 13a of the support case 13 has an arc surface centered on the support shaft 14. The tip surface 20a of the friction piece 20 is
With the rotation of, it slides along this arc-shaped inner side surface 13a. During this sliding, the friction piece 20 can swing around the pin 24 of the accommodation recess 21 within the range of the play 30.

As shown in FIG. 4, the accelerator sensor 15
Includes a sensor lever 15a and a brush 15b attached to the lever 15a. The sensor lever 15a is
The center is fitted into a pin 13c provided on the support case 13 and attached to the sensor case 18 via a coil spring 31. The sensor lever 15a is rotatable around the pin 13c. The pin 15c protruding from the sensor lever 15a is a long hole 29 on the side surface of the arm base end 12a.
And are connected. Therefore, the arm base end 1
When the long hole 29 rotates together with 2a, the sensor lever 15a rotates and the accelerator opening corresponding to the amount of rotation is detected by the accelerator sensor 15.

According to the configuration of the accelerator apparatus of the present embodiment described above, the accelerator arm 12 is moved in accordance with the depression or return of the accelerator pedal 11 as shown by a solid line and a two-dot chain line in FIG. The end 12a rotates about the support shaft 14 with respect to the support case 13. At this time, the distal end surface 20a of the friction piece 20 slides along the inner side surface 13a of the support case 13 together with the arm base end portion 12a, and hysteresis is given to the pedaling force when the accelerator pedal 11 is depressed and when it is returned. That is, at the time of stepping, the return spring 16,
The sum of the urging force of No. 17 and the sliding resistance between the friction piece 20 and the support case 13 is applied to the driver's foot as a tread force. On the other hand, when returning, the force obtained by subtracting the sliding resistance from the urging force of both return springs 16 and 17 is applied to the driver's foot as a pedaling force. As a result, hysteresis is applied to the depression force when the accelerator pedal 11 is depressed and when it is returned.

FIG. 7 is a graph showing an example of the relationship between the pedaling force and the stroke of the accelerator pedal (pedal stroke). As is apparent from this graph, there is a remarkable difference in the pedaling force between the stepping direction and the returning direction. Further, it can be seen that a linear characteristic is obtained in the relationship between the pedal stroke and the pedaling force.

According to the accelerator device of this embodiment,
Hysteresis is applied to the pedaling force of the accelerator pedal 12 only by adding and attaching the friction piece 20 to the basic configuration including the accelerator pedal 11, the accelerator arm 12, the support case 13, and the return springs 16 and 17. Become. For this reason, the friction piece 20 for providing the pedaling force hysteresis can be easily assembled to the basic configuration. Further, the tip end surface 20a of the friction piece 20 is
Due to the urging forces 6 and 17, the support case 13 is constantly pressed against the inner surface 13a with a stable force. Therefore, the pedaling force hysteresis can be always provided with a stable operation.

In particular, in this embodiment, when the accelerator arm 12 rotates, the tip end surface 20a of the friction piece 20 slides along the inner side surface 13a of the support case 13 which is an arc surface, so that stable sliding friction can be obtained. Will be obtained. Therefore, it is possible to provide the pedaling force hysteresis with stable linear characteristics.

Further, in this embodiment, even if abrasion powder is generated between the front end surface 20a of the friction piece 20 and the inner side surface 13a of the support case 13, the abrasion powder is generated by both of them.
Since it falls from the contact portion of a, 13a, it does not stay at that portion. Therefore, the sliding resistance between the two 20a and 13a is less likely to change due to the abrasion powder. For this reason, it is possible to maintain a stable operation for a long time with respect to the application of the pedaling force hysteresis.

According to the accelerator device of this embodiment,
Since the friction piece 20 is fitted into the accommodation recess 21, the protrusion of the friction piece 20 at the arm base end 12a is reduced. For this reason, the friction piece 20 for providing the pedaling force hysteresis can be compactly assembled to the basic configuration, and the entire accelerator device can be reduced in size. Even if the friction piece 20 is damaged, the friction piece 20 is received in the housing recess 21. For this reason, even after the friction piece 20 is broken, the urging force of the return springs 16 and 17 can be applied to the accelerator arm 12, and the basic operation of the accelerator device can be ensured. That is, the operation of the electronically controlled throttle device can be continued by the driver without the accelerator piece 11 being returned from the depressed state due to the damage of the friction piece 20.

According to the accelerator device of this embodiment,
The friction piece 20 is allowed to swing around the pin 24 within the play 30 in the accommodation recess 21. Therefore, the dimensional tolerance of the friction piece 20 and the stress deformation of the friction piece 20 are appropriately allowed in the accommodation recess 21 within the range of the play 30. In this sense,
Assembling of the friction piece 20 to the housing recess 21 can be facilitated, and durability of the friction piece 20 can be increased.

According to the accelerator device of this embodiment,
Even if the friction piece 20 breaks into two or the pin 24 breaks, a crack including the tip end surface 20a of the friction piece 20 is caught by the constricted portion 21a of the accommodation recess 21 and does not fall off. For this reason, even after the friction piece 20 or the like is broken, the biasing force of the return springs 16 and 17 can be applied to the split piece of the friction piece 20, and the front end surface 20a can be pressed against the inner side surface 13a, and the pedaling force hysteresis can be obtained. The normal operation can be ensured for the application of.

[Second Embodiment] Next, a second embodiment of the accelerator device according to the present invention will be described with reference to the drawings. In the following embodiments including the present embodiment, the same reference numerals as those in the first embodiment denote the same parts, and a description thereof will be omitted. It will be mainly described.

FIG. 8 is a partial sectional side view showing a main part of the accelerator device. FIG. 9 shows a cross-sectional view along the line AA in FIG. FIG. 10 shows the right side surface of FIG. This embodiment differs from the accelerator device of the first embodiment in that a return spring 41 made of a compression spring is used, and an accelerator arm 12, a support case 13, and a friction piece 20 having a shape corresponding to the return spring 41 are used. .

That is, the support case 13 has a spring receiving portion 42 on the upper part thereof. The friction piece 20 is attached to the arm base end 12.
The supporting pin 24 is rotatably supported on the side surface of a. The friction piece 20 is formed such that the constricted portion 20 b corresponds to the outer periphery of the boss 23. The friction piece 20 includes an arm 43 extending upward from a base end thereof. Between the arm portion 43 and the spring receiving portion 42, a pair of return springs 41 made of a compression spring and having different diameters are provided. In addition, the configuration of the accelerator sensor and the like are the same as those of the first embodiment.

Accordingly, in the accelerator device, when the accelerator pedal is depressed from the fully closed state shown in FIG.
3, the urging force of the return spring 41 is applied to the accelerator arm 12
To act on. At the same time, friction piece 2
The frictional force between the front end surface 20 a of the support case 13 and the inner side surface 13 a of the support case 13 acts on the accelerator arm 12. Other functions and effects of this embodiment are the same as those of the first embodiment.
This is equivalent to that of the embodiment.

[Third Embodiment] Next, a third embodiment of the accelerator device according to the present invention will be described with reference to the drawings.

FIG. 11 is a partial sectional side view showing a main part of the accelerator device. FIG. 12 shows a cross-sectional view along the line CC of FIG. 11. FIG. 13 shows the right side surface of FIG. This embodiment differs from the accelerator device of the first embodiment in that a return spring 45 made of a tension spring is used, and an accelerator arm 12, a support case 13, and a friction piece 20 having a shape corresponding to the return spring 45 are used. .

That is, the support case 13 has a spring hook 46 on the upper part thereof. The friction piece 20 is attached to the arm base end 12.
a is rotatably supported via a support pin 24 on the upper part of the frame a. The friction piece 20 is fitted into a groove provided at the upper end of the arm base end 12a such that the constricted portion 20b is aligned with the outer periphery of the boss 23. The friction piece 20 includes spring hook portions 47 located on both sides of the distal end portion 20a. A pair of return springs 45 made of a tension spring is provided between the spring hook 47 and the spring hook 46 of the support case 13 (FIG. 11).
2 shows only the return spring 45 in the front. ). In addition, the configuration of the accelerator sensor and the like are the same as those of the first embodiment.

Therefore, in this accelerator device, when the accelerator pedal is depressed from the fully closed state shown in FIG. 11 and the arm base end portion 12a rotates, the return spring 45 through the spring hooking portion 47 of the friction piece 20. Is applied to the accelerator arm 12. At the same time, the tip surface 20a of the friction piece 20 and the inner surface 13a of the support case 13
Is applied to the accelerator arm 12. Other functions and effects of this embodiment are the same as those of the first embodiment.

It should be noted that the present invention is not limited to the above-described embodiments, and may be carried out as follows without departing from the spirit of the invention.

(1) In the first embodiment, the friction piece 20 is fitted into the accommodation recess 21 of the base end 12a of the arm. On the other hand, the receiving recess may be omitted, the friction piece may be fixed to one side surface of the arm base end portion, and the distal end surface may be provided so as to be able to contact the inner surface of the support case.

(2) In the first embodiment, two return springs 16 and 17 are provided, but one return spring may be provided.

(3) In each of the above embodiments, most of the components constituting the accelerator device are made of resin. However, any combination of resin and metal components may be used. However, also in this case, it is desirable that at least the friction piece and the portion of the inner surface of the support case that comes into contact with the friction piece are made of resin from the viewpoint of obtaining an appropriate sliding resistance.

[0051]

According to the first aspect of the present invention, it is possible to easily assemble parts for providing hysteresis to the pedaling force of the accelerator pedal, and to always provide the pedaling force hysteresis with a stable operation. be able to.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), the pedaling force hysteresis can be provided with stable linear characteristics.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, the friction piece for imparting the pedaling force hysteresis is compactly assembled to the basic structure. Thus, the size of the entire accelerator device can be reduced. In addition, even after the friction piece is broken, the urging force of the return spring can be applied to the accelerator arm, and the basic operation of the accelerator device can be ensured.

According to the invention described in claim 4, according to claim 3,
In addition to the effects of the invention described in (1), it is possible to easily assemble the friction pieces into the housing recesses, and to increase the durability of the friction pieces.

According to the invention described in claim 5, according to claim 3,
Or, in addition to the effect of the invention according to claim 4, even after the friction piece or the like is broken, the biasing force of the return spring can be applied to the cracking of the friction piece, and normal operation can be ensured for imparting the pedaling force hysteresis. it can.

[Brief description of the drawings]

FIG. 1 is a side view showing an accelerator device according to a first embodiment.

FIG. 2 is also a plan view showing an accelerator device.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 1;

FIG. 5 is also a side view of the base end of the arm.

FIG. 6 is a side view showing the friction piece.

FIG. 7 is a graph showing the relationship between the pedal effort and the pedal stroke.

FIG. 8 is a partial cross-sectional side view showing a main part of an accelerator device according to a second embodiment.

FIG. 9 is a sectional view taken along line AA of FIG. 8;

FIG. 10 is a diagram showing a range B on the right side surface of FIG. 8;

FIG. 11 is a partial cross-sectional side view showing a main part of an accelerator device according to a third embodiment.

FIG. 12 is a sectional view taken along the line CC of FIG. 11;

FIG. 13 is a diagram showing a range D on the right side surface of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Accelerator pedal 12 Accelerator arm 12a Arm base end 13 Support case 13a Inner side surface 14 Support shaft 15 Accelerator sensor 16 Return spring 17 Return spring 20 Friction piece 20a Tip surface 21 Receiving recess 21a Constricted portion 24 Pin 30 Play 41 Return spring 45 Return Spring

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G05G 25/00 G05G 25/00 C

Claims (5)

[Claims] An accelerator arm provided with an accelerator pedal at a distal end thereof; a support case enclosing a base end of the accelerator arm and rotatably supporting the base end via a support shaft; An accelerator device comprising: a return spring for urging the rotation of the accelerator arm in a return direction to return the accelerator pedal to a return position; and an accelerator sensor for detecting a rotation amount of the accelerator arm as an accelerator opening. A friction piece attached to a base end of the accelerator arm and having a distal end surface that comes into contact with an inner surface of the support case, wherein the distal end surface of the friction piece is pressed against an inner surface of the support case. One end of a return spring is hooked on the friction piece, and when the accelerator arm rotates, the distal end surface of the friction piece together with the base end is supported by the support cable. By sliding along the inner surface of the scan, an accelerator apparatus is characterized in that so as to impart hysteresis to the tread force when returning the time depression of the accelerator pedal. 2. An inner surface of the support case forms an arc surface centered on the support shaft, and a tip surface of the friction piece slides along the arc surface with rotation of the accelerator arm. The accelerator device according to claim 1, wherein the accelerator device is provided. 3. The accelerator device according to claim 1, wherein a housing recess is provided at a base end of the accelerator arm, and the friction piece is fitted into the housing recess. 4. A pin provided in the housing recess, wherein the friction piece is rotatably supported around the pin in the housing recess, and between the friction piece and the housing recess. The accelerator device according to claim 3, further comprising a play provided to allow the friction piece to swing. 5. The accelerator device according to claim 3, wherein the housing recess includes a constricted portion, and the friction piece includes an outer shape corresponding to the constricted portion.