JP2001206095A - Acceleration lever operation variable detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the load caused by the operation of acceleration lever stepping operation when an acceleration lever is stepped from working on a turning angle sensor and improve the durability of the turning angle sensor. SOLUTION: When the acceleration lever 6 is turned toward the complete open position from the initial position, the twist coil spring of the turning angle sensor 21 is energized toward the maximum turning position so that the lever shaft 25D of a lever plate 25 pursues the acceleration lever 6 and abuts on it. As a result, even if the acceleration pedal is stepped strongly, the load can be prevented from working on the turning angle sensor 21. A maximum position stopper is provided to stop the turning of the lever plate 25 by abutting at the maximum turning position of the lever plate 25. As a result, if the acceleration lever 6 is stepped further more than the complete open position, the acceleration lever 6 is separated from the lever shaft 25D for preventing an excessive load from working on the lever plate 25, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator operation amount detecting device suitably used for an automobile equipped with an electric throttle device.

[0002]

2. Description of the Related Art In general, an electric throttle device used for an automobile engine or the like generally comprises an accelerator operation amount detecting device provided at the foot of a driver and an electric throttle valve device attached to the engine. The electric throttle valve device opens and closes the throttle valve using an electric motor or the like based on a detection signal from an accelerator operation amount detecting device.

Here, the accelerator operation amount detecting device is mounted on a mounting bracket on the vehicle body side of an automobile, and is in an initial position (idling position) where the accelerator pedal is released.
And an accelerator lever that is rotated between a fully opened position where the accelerator pedal is depressed most, a return spring that constantly biases the accelerator lever toward the initial position, and an angle when the accelerator lever is rotated. It is generally constituted by a rotation angle sensor which detects an operation amount and outputs it to a control unit or the like for controlling an engine (for example,
1-264707, etc.).

The rotation angle sensor is provided on a cylindrical sensor body attached to a mounting bracket, and is rotatably provided on the sensor body via a rotation shaft. The accelerator lever is provided at an initial position and a fully open position. A sensor lever that is pivoted between a minimum pivot position and a maximum pivot position following the accelerator lever when pivoting between the sensor lever and the sensor lever provided in the sensor body; It comprises a sensor unit for detecting a rotation angle when moving, and a sensor return spring provided in the body and for urging the sensor lever toward a minimum rotation position. Here, the sensor return spring urges the sensor lever so as to face and contact the accelerator lever that rotates from the initial position toward the fully opened position.

When the driver operates the accelerator pedal to rotate the accelerator lever, the sensor lever and the like rotate by an angle corresponding to the accelerator operation amount against the biasing force of the sensor return spring. The sensor unit detects the rotation angle of the sensor lever, and outputs a detection signal corresponding to the accelerator operation amount at this time to a control unit or the like. On the other hand, when the accelerator lever is returned from the fully open position toward the initial position, the sensor lever and the like rotate following the accelerator lever by the urging force of the sensor return spring and return to the initial position.

[0006]

By the way, the accelerator operation amount detecting device according to the prior art described above, when the accelerator lever is rotated from the initial position to the fully open position, is operated.
The sensor lever is urged by a sensor return spring so as to face the accelerator lever.

For this reason, when the accelerator pedal is stepped on vigorously, the load caused by the stepping operation acts on the sensor lever, the sensor section, and the like from the accelerator lever. There is a problem that the sensor becomes large.

Further, when the accelerator lever is further rotated from the state where the sensor lever is disposed at the fully open position by depressing the accelerator pedal and the accelerator lever is turned, the rotation of the sensor lever is restricted by the stopper provided in the sensor portion. In spite of this, since the sensor lever is rotated, an excessive load such as twist is applied to the sensor lever, the rotation shaft, and the like at this time.

Therefore, in the prior art, in order to protect the sensor lever and the like from such an excessive load, it is necessary to separately provide a stopper for stopping the rotation of the accelerator lever at the fully open position on the mounting bracket or the like. There is a problem that it becomes complicated.

When a stopper for stopping the rotation of the accelerator lever at the fully open position is provided, when the rotation angle sensor is mounted on the mounting bracket, the maximum rotation position of the sensor lever of the rotation angle sensor is set. There is a problem that it is necessary to accurately adjust the position to the fully opened position of the accelerator lever, and it takes time and effort to mount the rotation angle sensor.

Further, if the sensor return spring of the rotation angle sensor is damaged for some reason when the accelerator lever is rotated toward the fully open position, even if the accelerator lever is returned to the initial position, Since only the lever returns to the initial position, there is a problem that the sensor lever does not return to the initial position while stopping at the position where the return spring is damaged.

Therefore, it has been considered that the shape of the accelerator lever is formed so as to sandwich the sensor lever so that the sensor lever is returned together with the accelerator lever. In this case, the shape of the accelerator lever is changed. There is a problem that it becomes complicated.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to prevent a load caused by this depression operation from acting on a rotation angle sensor when the accelerator lever is depressed. An object of the present invention is to provide an accelerator operation amount detecting device which prevents the rotation angle sensor from increasing its durability.

Another object of the present invention is to provide an accelerator operation amount detecting device capable of returning a sensor lever of a rotation angle sensor to a minimum rotation position even if the sensor lever is broken. It is in.

[0015]

An accelerator operation amount detecting device according to the present invention comprises an accelerator lever mounted on a vehicle body and rotatably operated between an initial position and a fully open position; It comprises a return spring for urging and a rotation angle sensor for detecting an angle at which the accelerator lever rotates as an operation amount.

Then, in order to solve the above-mentioned problem,
A feature of the configuration adopted in the first aspect of the present invention is that the rotation angle sensor has a sensor body mounted on the vehicle body side and an accelerator lever provided on the sensor body rotates between an initial position and a fully open position. A sensor lever that is sometimes rotated between a minimum rotation position and a maximum rotation position following the accelerator lever, and a sensor unit provided on the sensor body and detecting a rotation angle of the sensor lever; A spring member is provided between the sensor body and the sensor lever and always biases the sensor lever toward the maximum rotation position with a spring force smaller than a return spring.

With this configuration, when the accelerator lever is rotated toward the fully open position, the sensor lever comes into contact with the accelerator lever so as to follow the accelerator lever by the biasing force of the spring member and rotate together. As a result, it is possible to prevent an excessive load from acting on the rotation angle sensor during the stepping operation.

According to the second aspect of the present invention, the sensor body is provided with a maximum position stopper for restricting the rotation of the sensor lever at the maximum rotation position of the sensor lever.

With this configuration, when the sensor lever reaches the maximum rotation position, the maximum position stopper moves.
Since the rotation is stopped by contacting the sensor lever, when the accelerator lever is further rotated, the accelerator lever is separated from the sensor lever. This can prevent an excessive load from being applied to the sensor lever and the like. In addition, since the maximum position stopper can restrict the rotation of the sensor lever at the maximum rotation position, the adjustment operation of the sensor unit can be performed by the rotation angle sensor alone.

According to a third aspect of the present invention, the accelerator lever is configured to push the sensor lever back to the minimum rotation position by the return spring when the stepping operation is released.

With this configuration, for example, when the sensor lever is turned to the maximum turning position,
Even if the spring member is broken, when the accelerator lever is returned to the initial position by the return spring, the sensor lever can be pushed back to the minimum rotation position by the accelerator lever.

According to the fourth aspect of the present invention, the accelerator lever is connected to the vehicle body via the rotary connecting tool, and the rotary connecting tool has a hysteresis generating portion for generating a resistance when the accelerator lever is operated. Have prepared.

With this configuration, it is possible to provide the hysteresis generating section by using the rotating connector. Also, when you depress the accelerator lever,
A resistance force is generated in the hysteresis generating section, and the accelerator operation by the accelerator lever can be stabilized.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example in which an accelerator operation amount detecting device according to an embodiment of the present invention is applied to an electric throttle device of an automobile will be described in detail with reference to FIGS.

Reference numeral 1 denotes an accelerator operation amount detection device which is located in the vehicle and is provided at the foot of the driver. The accelerator operation amount detection device 1 is, as shown in FIGS. , An accelerator lever 6, a return spring 7, a rotation connector 8, a rotation angle sensor 21, and the like.

Reference numeral 2 denotes a mounting bracket provided on a vehicle body (not shown) of the vehicle. The mounting bracket 2 has a rectangular bottom plate portion 3 which is formed to be long vertically upward and downward, and the bottom plate portion 3. Are formed in a U-shaped cross section by a left plate portion 4 erected on the left side and a right plate portion 5 erected on the right side of the bottom plate portion 3 substantially in parallel with the left plate portion 4. As shown in FIG. 3, a spring hook 3A for hooking a return spring 7, which will be described later, is provided at the upper end of the bottom plate 3.

The left plate portion 4 is provided with a U-shaped notch 4A into which the sensor body 22 of the rotation angle sensor 21 is fitted, and a screw is provided above and near the notch 4A. Hole 4
B and 4B are formed. An accelerator lever stopper 4C bent rightward is provided at the upper end of the left plate portion 4. The accelerator lever stopper 4C contacts the accelerator lever 6 urged by the return spring 7, and the accelerator lever stopper 4C 6 defines the initial position (idling position). Further, an insertion hole 4D (shown in FIG. 4) in which the pin 9 of the rotation connection tool 8 is inserted is formed near the lower side of the left plate portion 4. On the other hand, the right plate portion 5 has an insertion hole 5A at a position corresponding to the insertion hole 4D of the left plate portion 4, into which the pin 9 of the rotary connector 8 is inserted.

Reference numeral 6 denotes an accelerator lever rotatably mounted on the mounting bracket 2 via a rotary connecting member 8. The accelerator lever 6 is formed of a rod-like body bent in a substantially rectangular shape, and has a lower end portion. Is equipped with an accelerator pedal 6A. A return spring 7 is provided on the upper side of the accelerator lever 6.
A U-shaped spring hook 6B is secured by welding or the like. When the accelerator pedal 6A is depressed in the direction indicated by the arrow A in FIGS. 1 and 3, the accelerator lever 6 is rotated about the rotary connecting member 8 and the upper side is turned in the direction indicated by the arrow B. It works.

Numerals 7 and 7 denote two return springs provided between the mounting bracket 2 and the accelerator lever 6. One end of each of the return springs 7 is hooked on a spring hook 3A of the bottom plate 3;
The other end is hooked on a spring hook 6B of the accelerator lever 6. Accordingly, when the load on the accelerator pedal 6A is gradually removed from the state in which the accelerator pedal 6A is depressed, the return springs 7 release the accelerator lever 6A.
Is rotated in the direction of arrow C to return the accelerator pedal 6A to the initial position in the direction of arrow D. When the load on the accelerator pedal 6A is completely removed, the return spring 7 moves the upper side of the accelerator lever 6 to the left plate 4
To the accelerator lever stopper 4C.

Numeral 8 designates a rotary connecting member provided on the mounting bracket 2. The rotary connecting member 8 is provided with the head 9A in contact with the right plate 5 as shown in FIG. Insertion hole 5 of plate 5
A pin 9 inserted between A and the insertion hole 4D of the left plate portion 4
And a metal tube 10 located between the plate portions 4 and 5 and loosely fitted on the outer peripheral side of the pin 9, and a flange portion 11 </ b> A covering an end surface of the metal tube 10. The left and right resin collars 11 and 11 inserted between the pin 9 and the pin 9 so as to contact the flange portion 11A of the right resin collar 11.
, A flat washer 12 provided on the outer peripheral side, a wave washer 13 provided between the flat washer 12 and the right plate portion 5 and provided on the outer peripheral side of the pin 9, and the pin 9 is prevented from coming off. For this reason, it is roughly constituted by a bolt 14 screwed to the pin 9 from the left plate portion 4 side.

The rotation connecting member 8 is capable of rotating the accelerator lever 6 with respect to the mounting bracket 2 by fixing an intermediate portion of the accelerator lever 6 to an outer peripheral side of the metal tube 10 by a fixing means such as welding. I support it.

Further, the turning connector 8 forms a hysteresis generating section 15 by the metal pipe 10, the flat washer 12, and the wave washer 13. This hysteresis generator 15
The wave washer 13 makes the resin collars 11, 11 frictionally contact the left plate portion 4, the metal pipe 10, and the flat washer 12, so that the operation force when the accelerator pedal 6A is depressed and the operation of the accelerator pedal 6A are controlled. Hysteresis is generated between the release force and the operation force (reaction force from the accelerator pedal 6A) at the time of release, thereby stabilizing the operation feeling of the accelerator pedal 6A.

Next, reference numeral 21 denotes a rotation angle sensor according to the present embodiment mounted on the mounting bracket 2. The rotation angle sensor 21 detects an angle when the accelerator lever 6 rotates as an operation amount. As shown in FIG. 5 and FIG. 6, it is roughly constituted by a sensor body 22, a rotating shaft 23, a lever plate 25, a sensor section 26, a torsion coil spring 27, a maximum position stopper 29, and the like, which will be described later.

Reference numeral 22 denotes a sensor body which forms an outer shell of the rotation angle sensor 21. The sensor body 22 is formed in a cylindrical shape with a bottom by a cylindrical portion 22A and a bottom portion 22B. A partition 22C is provided at an intermediate portion. The connector terminal 22 is provided on the outer peripheral side of the cylindrical portion 22A.
A connector 22D having D1 (shown in FIG. 6) and screwing portions 22E for mounting the sensor body 22 to the mounting bracket 2 are formed. Further, a circular annular projection 22F, which is partially cut away, protrudes toward the opening near the outer peripheral side of the partition wall 22C, as shown in FIG. One end of the torsion coil spring 27 is latched.

Reference numeral 23 denotes a rotation shaft provided on the sensor body 22. The rotation shaft 23 is rotatably supported at the center of the partition wall 22C. A disc-shaped rotor 24 is integrally provided at one end of the rotating shaft 23, and a lever plate 25 described later is attached to the other end.

Reference numeral 25 denotes a lever plate as a sensor lever which is mounted on the rotation shaft 23 at the opening side of the sensor body 22. At the center of the lever plate 25, the other end of the rotation shaft 23 is provided. It is fixed by fixing means such as caulking or welding. The lever plate 25 extends in the radial direction, and the lever portion 2 bent to the opening side is provided on the outer peripheral side thereof.
5A, a spring hook portion 25B located on the opposite side of the lever portion 25A in the radial direction and bent to the bottom side, and a stopper contact located between the lever portion 25A and the spring hook portion 25B and bent to the bottom side. Contact portions 25C are provided.

Further, a lever shaft 25D extending from the lever portion 25A is fixed to the lever portion 25A.
The lever portion 25A is in contact with the accelerator lever 6 via the lever shaft 25D. Here, when the lever shaft 25D of the sensor plate 25 rotates in the direction indicated by the arrow B toward the fully open position, the upper side of the accelerator lever 6 rotates.
It is located on the opposite side to this rotation direction and is in contact with the accelerator lever 6.

Numeral 26 denotes a sensor section comprising a potentiometer or the like provided between the bottom 22B of the sensor body 22 and the rotor 24. The sensor section 26 comprises a substrate 26A disposed above the bottom 22B and a substrate 26A. 26A, a resistor 26B provided on the surface of the rotating shaft 23 and extending in the direction of rotation of the rotating shaft 23;
6B, and is constituted by conductive sliding brushes 26C, 26C that are in sliding contact with 6B. Further, a connector terminal 22D1 of a connector 22D is electrically connected to the resistor 26B.

Then, the sensor unit 26 moves the sliding brush 26C on the resistor 26B by rotating the rotating shaft 23 and the rotor 24, and changes the resistance value output from the resistor 26B. Thus, the rotation angle of the rotation shaft 23 is detected as a change in the resistance value, and a detection signal is output from the connector 22D to a control unit (not shown) for controlling the engine.

Here, the sensor section 26 is, for example,
3. When the sliding brush 26C or the like rotates in the direction of arrow E in FIG. 3, a detection signal for opening an electric throttle valve device (not shown) provided in the engine is output, and the rotating shaft 23 Is set so as to output a detection signal for closing the throttle valve device when turned in the direction of arrow F.

Reference numeral 27 denotes a torsion coil spring as a spring member disposed between the partition wall 22C and the lever plate 25 and located on the outer peripheral side of the rotation shaft 23.
7 has one end hooked to the annular projection 22F of the sensor body 22, and the other end
B is hooked. As a result, the torsion coil spring 27 urges the lever plate 25 against the sensor body 22 in the direction indicated by the arrow E in FIG.

The torsion coil spring 27 has a smaller spring force than the return spring 7, and when the driver releases the operation of the accelerator pedal 6A, the accelerator lever 6 is returned to the initial position. It is elastically deformed by the urging force of the spring 7, and allows the sliding brush 26C of the sensor unit 26 to be arranged at the initial position (zero point position) together with the lever plate 25, the rotating shaft 23 and the like.

On the other hand, when the accelerator pedal 6A is depressed, the torsion coil spring 27 follows the lever plate so as to follow the upper side of the accelerator lever 6 which is turned in the direction of arrow B from the initial position to the fully opened position. The lever shaft 25 </ b> D is rotated in the direction of arrow E to abut on the accelerator lever 6.

Reference numeral 28 denotes a minimum position stopper provided on the sensor body 22. The minimum position stopper 28 contacts the stopper contact portion 25C of the lever plate 25.
The partition wall 22C protrudes toward the outer peripheral side. The minimum position stopper 28 stops the sensor portion 26 at the minimum rotation position (idling position) when the stopper contact portion 25C of the lever plate 25 contacts.

Reference numeral 29 denotes a maximum position stopper provided on the sensor body 22. The maximum position stopper 29 is located on substantially the same circumference as the minimum position stopper 28, and
It protrudes from the outer peripheral side of 2C. The maximum position stopper 29 restricts the rotation of the lever plate 25 when the stopper contact portion 25C of the lever plate 25 comes in contact with the stopper plate 25, and stops the sensor unit 26 at the maximum rotation position.

The rotation angle sensor 21 thus configured is connected to the screwing portions 22E, 22E of the sensor body 22.
It is attached to the mounting bracket 2 by screw members 30, 30 (shown in FIG. 2) which are screwed into the screw holes 4B, 4B of the left plate portion 4 via E.

The accelerator operation amount detecting device 1 according to the present embodiment has the above-described configuration, and its operation will be described next.

First, when the operation of the accelerator pedal 6A is released, the upper side of the accelerator lever 6 is pulled in the direction of arrow C by the return spring 7 as shown by the solid line in FIGS. The upper side of the accelerator lever 6 is positioned in contact with the accelerator lever stopper 4C of the mounting bracket 2. At this time, the rotation angle sensor 21
The lever shaft 25D of the lever plate 25 is pushed back by the accelerator lever 6 and is located at the minimum rotation position.

When the driver depresses the accelerator pedal 6A, the upper side of the accelerator lever 6 rotates in the direction of arrow B against the return spring 7. At this time, in the rotation angle sensor 21, the biasing force of the torsion coil spring 27 causes the lever shaft 25 </ b> D of the lever plate 25 to abut the accelerator lever 6 and rotate in the direction of arrow E in FIG. 5.

When the accelerator pedal 6A is further depressed, as shown by the two-dot chain line in FIGS. 1 and 3, the stopper contact portion 25C of the lever plate 25 is moved to the maximum position where the stopper body 25C is provided on the sensor body 22. It contacts the stopper 29. Thereby, the lever plate 25, the rotating shaft 23,
The sliding brush 26C and the like of the sensor unit 26 stop at the maximum rotation position.

When the accelerator pedal 6A is depressed from the state in which the lever plate 25, the rotation shaft 23, the sensor section 26, etc. of the rotation angle sensor 21 are arranged at the maximum rotation position, the two positions shown in FIG. As indicated by the dashed line, the accelerator lever 6 is separated from the lever shaft 25D of the lever plate 25. Therefore, even when the accelerator pedal 6A is depressed strongly and deeply, an excessive load does not act on the lever plate 25 and the like, and it is possible to prevent the lever plate 25 and the like from being damaged.

Here, if the torsion coil spring 27 is damaged for any reason, the torsion coil spring 2
At the position where 7 is broken, the lever plate 25, the rotating shaft 23,
The rotation of the sensor unit 26 and the like stops. However, when the accelerator lever 6 is returned to the initial position by the return spring 7, the lever plate 25 is pushed back by the accelerator lever 6 in the direction of arrow C to return the lever plate 25, the sensor unit 26, and the like to the minimum rotation position. it can.

Further, when the driver operates the accelerator pedal 6A, the hysteresis generating portion 15 provided on the rotary connecting member 8 can apply a frictional resistance in the rotational direction to the accelerator lever 6. Thereby, the operation feeling at the time of operating the accelerator can be stabilized.

Thus, according to the present embodiment, when the accelerator lever 6 is rotated from the initial position to the fully open position, the lever shaft 25D of the lever plate 25
Is constantly urged by the torsion coil spring 27 toward the maximum rotation position so that the accelerator plate 6 follows and comes into contact with the accelerator lever 6. Therefore, even when the accelerator pedal 6A is strongly depressed, Can be prevented from acting on the rotation angle sensor 21. Moreover, at the maximum rotation position of the lever plate 25, the maximum position stopper 29 stops the rotation of the lever plate 25. Therefore, when the accelerator lever 6 is further depressed from the fully open position, the accelerator lever 6 is moved to the lever shaft. 25D, it is possible to prevent an excessive load from acting on the lever plate 25 and the like.

As a result, the strength of the rotation angle sensor 21 can be reduced, so that the thickness of each part can be reduced, the structure can be simplified, and the rotation angle sensor 21 can be reduced in size and weight. Can be. Further, since the stopper for fully opening the accelerator lever used to protect the rotation angle sensor 21 can be omitted, the structure of the mounting bracket 2 can be simplified to improve productivity, reduce manufacturing costs, and the like. Can be achieved.

Further, since the maximum position stopper 29 can define the maximum rotation position of the lever plate 25, the sensor section 26, etc., the adjustment operation of the sensor section 26 can be performed by the rotation angle sensor 21 alone. Assembly workability can be improved. Further, by providing the rotation angle sensor 21 with a maximum position stopper 29 for defining the maximum rotation position,
The accelerator lever 6 having a different stroke can be accommodated, and can be mounted on various types of vehicles.

Further, when the accelerator lever 6 is rotated to the fully open side, the torsion coil spring 2 of the rotation angle sensor 21 is rotated.
7 is returned to the accelerator lever 6 by the return spring 7.
When is returned to the initial position, the lever shaft 25D of the lever plate 25 can be pushed back by the accelerator lever 6, and the lever plate 25 (the sensor unit 26) can be returned to the minimum rotation position. Thereby, the accelerator lever 6 can be formed as a simple rod-shaped body, and also in this regard, the manufacturing cost can be reduced.

The torsion coil spring 27 has one end locked to the sensor body 22 and the other end locked to the lever plate 25. The spring 27 rotates only the lever plate 25. Thus, the rotation shaft 23 and the sensor unit 26 can be prevented from rotating toward the maximum rotation position, and the engine speed can be prevented from being carelessly increased.

Further, a hysteresis generating portion 15 including a metal tube 10, a resin collar 11, a wave washer 13 and the like is provided on the rotary connecting member 8 which rotatably supports the accelerator lever 6 with respect to the mounting bracket 2. From the rotating connector 8
, The hysteresis generator 15 can be provided, and the configuration can be simplified. When the accelerator lever 6 is rotated, the hysteresis generating unit 1 is turned on.
5, a resistance force can be generated, and the accelerator operation by the accelerator lever 6 can be stabilized.

In the embodiment, the rotation angle sensor 21
Has a contact-type sensor unit 2 such as a potentiometer
6 has been described as an example, but the present invention is not limited to this. For example, non-contact by an electromagnetic pickup using a magnetoresistive element, a Hall element, or the like, or an optical pickup using a photocoupler, etc. You may comprise the type | mold sensor part.

[0061]

As described in detail above, according to the first aspect of the present invention, the rotation angle sensor includes a sensor body mounted on the vehicle body side and an accelerator lever provided on the sensor body having an initial position and a fully open position. A sensor lever that is rotated between a minimum rotation position and a maximum rotation position following the accelerator lever when rotating between the sensor lever and a rotation angle of the sensor lever provided on the sensor body. And a spring member provided between the sensor body and the sensor lever, the spring member constantly biasing the sensor lever toward the maximum rotation position with a smaller spring force than a return spring. When the accelerator lever is rotated toward the fully open position, the sensor lever abuts on the accelerator lever so as to chase the accelerator lever by the urging force of the spring member and rotates together. It can be. As a result, it is possible to prevent an excessive load at the time of the stepping operation from acting on the rotation angle sensor, so that the strength of each part can be reduced, and the rotation angle sensor can be reduced in size and weight.

According to the second aspect of the present invention, the sensor body is provided with the maximum position stopper for restricting the rotation of the sensor lever at the maximum rotation position of the sensor lever. When has reached the maximum rotation position, the rotation can be stopped by contacting the sensor lever. Thus, even if the accelerator lever is further rotated, the accelerator lever only separates from the sensor lever, so that an excessive load can be prevented from being applied to the sensor lever and the like. As a result, the stopper for fully opening the accelerator lever used to protect the rotation angle sensor can be omitted, thereby simplifying the configuration of the accelerator operation amount detection device, improving productivity and reducing manufacturing costs. Reduction can be achieved. Further, since the maximum position stopper can regulate the rotation of the sensor lever at the maximum rotation position, the adjustment operation of the sensor unit can be performed by the rotation angle sensor alone, and the workability at the time of assembly is improved. be able to.

According to the third aspect of the present invention, when the accelerator lever is released from the depression operation, the return spring pushes the sensor lever back to the minimum rotation position. Even if the spring member is broken while being rotated, when the accelerator lever is returned to the initial position by the return spring, the sensor lever can be pushed back to the minimum rotation position by the accelerator lever. As a result, the accelerator lever can be formed as a simple rod-like body without forming the accelerator lever in a peculiar shape as described in the related art,
Also in this regard, the manufacturing cost can be reduced.

According to the fourth aspect of the present invention, the accelerator lever is connected to the vehicle body via the rotary connecting member, and the rotary connecting member has a hysteresis generating portion for generating a resistance when the accelerator lever is operated. Is provided, the hysteresis generating portion can be provided by using the rotating connector, and the configuration can be simplified. Further, when the accelerator lever is depressed, a resistance force is generated in the hysteresis generating section, and the accelerator operation by the accelerator lever can be stabilized and operability can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an accelerator operation amount detection device according to the present invention.

FIG. 2 is a left side view in FIG. 1 showing an accelerator operation amount detection device according to the present invention.

FIG. 3 is an enlarged front view showing a main part of the accelerator operation amount detection device in FIG. 1;

FIG. 4 is an enlarged cross-sectional view of a main part of the rotary connecting member as viewed from a direction indicated by arrows IV-IV in FIG. 3;

FIG. 5 is a front view showing the rotation angle sensor in FIG. 1 in a state in which a lever plate is disposed at a maximum rotation position.

FIG. 6 shows the internal structure of the rotation angle sensor as indicated by arrows VI-VI in FIG.
It is sectional drawing seen from the direction.

FIG. 7 is a front view showing the sensor body of the rotation angle sensor alone;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Accelerator operation amount detection device 6 Accelerator lever 7 Return spring 8 Rotating connector 15 Hysteresis generation part 21 Rotation angle sensor 22 Sensor body 25 Lever plate (sensor lever) 26 Sensor part 27 Torsion coil spring (spring member) 29 Maximum position Stopper

Claims (4)

[Claims] 1. An accelerator lever mounted on a vehicle body and operated to rotate between an initial position and a fully open position, a return spring that constantly biases the accelerator lever toward the initial position, and the accelerator lever rotates. An accelerator operation amount detection device comprising: a rotation angle sensor for detecting a time angle as an operation amount; wherein the rotation angle sensor is a sensor body attached to the vehicle body side; and the accelerator lever provided on the sensor body. A sensor lever that is pivoted between a minimum pivot position and a maximum pivot position following the accelerator lever when pivots between an initial position and a fully open position; and A sensor unit for detecting a rotation angle of the sensor lever,
An accelerator operation amount detection, comprising a spring member provided between the sensor body and the sensor lever, the spring member constantly biasing the sensor lever toward a maximum rotation position with a smaller spring force than the return spring. apparatus. 2. The accelerator operation amount detecting device according to claim 1, wherein a maximum position stopper for restricting rotation of the sensor lever at a maximum rotation position of the sensor lever is provided on the sensor body. 3. The accelerator operation amount detecting device according to claim 1, wherein the accelerator lever is configured to push back the sensor lever to a minimum rotation position by the return spring when the accelerator operation is released. 4. The accelerator lever is connected to the vehicle body via a rotary connector, and the rotary connector includes a hysteresis generating portion that generates a resistance when the accelerator lever is operated. The accelerator operation amount detecting device according to claim 1, 2 or 3.