JPH11294206A - Accelerator manipulated variable detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve quietness of operation and life by relaxing an impact of a casing against a stopper. SOLUTION: A buffer 14 is provided to a claw part 13A of a stopper plate 13, wherein a flexible strip 14B is provided to the buffer 14 to bend elastically so as to contact with an initial position regulating projection 7. Therefore, when the claw part 13A of the stopper plate 13 comes close to the initial position regulating projection 7, the flexible strip 14B contacts with the initial position regulating projection 7 before the claw part 13A contacts with an adjusting screw 8, so that striking sound is lowered, and abrasion and damage are prevented. The flexible strip 14B of the buffer 14 bends so that the claw part 13A contacts with the adjusting screw 8, resulting in precisely controlling a rotating range of a rotating axis.

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 suitable for detecting an operation amount of an accelerator pedal provided on a vehicle such as an automobile.

[0002]

2. Description of the Related Art Generally, in a vehicle such as an automobile, an accelerator pedal provided on a driver's cab side is connected to a throttle valve on an engine side via a wire or the like. The vehicle is driven at a desired speed by opening and closing the throttle valve according to. In recent vehicles, an accelerator operation amount detecting device is provided near the accelerator pedal or the like, and the accelerator operation amount is detected by the accelerator operation amount detecting device, and the throttle valve is operated by a motor or the like according to the detection signal. There is one that opens and closes (for example, Japanese Patent Laid-Open No. 62-2849).
No. 32, JP-A-63-150449, etc.).

A description will now be given of a conventional accelerator operation amount detecting device used for detecting an operation amount of an accelerator pedal. The accelerator operation amount detecting device is provided on a casing and rotatably provided on the casing. A rotating shaft, a wire drum provided on the rotating shaft and connected to an accelerator pedal via a wire, and a casing provided on the rotating shaft or the wire drum for rotating together with the wire drum. It is constituted by a stopper that restricts the rotation range of the rotation shaft by abutting, and rotation detection means provided on the casing and detecting the rotation amount of the rotation shaft as an accelerator operation amount.

[0004] In the accelerator operation amount detecting device constructed as described above, the rotation shaft is rotated together with the wire drum by the operation of the accelerator pedal. And outputs it to the control unit as a throttle valve control signal.

[0005] The amount of rotation of the rotating shaft is within a range in which a stopper provided on the rotating shaft contacts the casing, for example,
It is restricted by the rotation range between the initial position as the minimum position and the fully open position as the maximum position.

[0006]

However, in the accelerator operation amount detecting device according to the prior art described above, the stopper is brought into contact with the casing to restrict the rotation range of the rotation shaft. A beating sound is generated when it comes into contact with the vehicle. In particular, in the accelerator operation amount detection device, since the rotating shaft is returned to the initial position by the urging force of the return spring, the stopper strongly collides with the casing by the urging force of the return spring, generating a loud tapping sound. There's a problem.

Further, since the casing and the stopper are formed of a high-hardness metal material in consideration of abrasion due to contact, there is a problem in that a loud sound is generated due to collision between the high-hardness metal materials.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to reduce the impact when the casing and the stopper come into contact with each other, and to improve the quietness and the life during operation. To provide an accelerator operation amount detecting device.

[0009]

A rotation stopper mechanism according to the present invention comprises a casing, a rotation shaft rotatably provided on the casing, and an accelerator pedal provided on the rotation shaft through a wire. A connected wire drum, a stopper provided on the rotating shaft or the wire drum to rotate together with the wire drum, and a stopper for restricting a rotating range of the rotating shaft by contacting the casing; and the casing. And rotation detecting means for detecting a rotation amount of the rotation shaft as an accelerator operation amount.

[0010] In order to solve the above-mentioned problems,
A feature of the configuration adopted in the first aspect of the present invention is that a cushioning member that elastically bends when the stopper approaches the casing is provided between the casing and the stopper.

[0011] With this configuration, the rotation shaft is rotated together with the wire drum by operating the accelerator pedal, and when the stopper provided on the rotation shaft approaches the casing, the cushioning member is moved to the other side. This member is elastically bent to abut against the member, and the impact at this time is reduced.

According to a second aspect of the present invention, a projection is provided on the casing, the buffer member is provided on a stopper and protrudes toward the casing, and a notch provided at a position corresponding to the projection. And that it consists of:

With this configuration, when the stopper approaches the casing, the cushioning piece elastically bends and abuts on the member on the other side before the stopper abuts on the projection, and the impact at this time is reduced. To relax. In addition, since the stopper comes into contact with the projection via the cutout portion by bending the cushioning piece, the rotation range of the rotation shaft is restricted at this position.

According to a third aspect of the present invention, a projection is provided on the casing, and the cushioning member is constituted by an elastic cylinder provided on an outer peripheral side of the projection. Thus, when the stopper approaches the casing, the elastic cylinder elastically bends and abuts against the member on the other side before the stopper abuts on the projection, and the impact at this time is reduced. Moreover, since the stopper comes into contact with the projection in the elastic cylinder body by bending the elastic cylinder body, the rotation range of the rotation shaft is regulated at this position.

According to a fourth aspect of the present invention, the projection is formed by an adjustable screw. Thereby, the rotation range of the rotation shaft can be adjusted by rotating the screw in an arbitrary direction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an accelerator operation amount detecting device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, FIGS. 1 to 9 show a first embodiment of the present invention. Reference numeral 1 denotes an intake pipe constituting an intake passage.
The intake pipe 1 is connected to an intake side (both not shown) of an engine mounted on a vehicle, and circulates intake air toward a combustion chamber side in the engine. Reference numeral 2 denotes a throttle valve provided in the middle of the intake pipe 1. The throttle valve 2 is opened and closed by a throttle actuator 3 constituted by an electric motor or the like, and the amount of intake air is increased or decreased according to the opening degree. It is to let.

Reference numeral 4 denotes an accelerator pedal provided in the driver's cab of the vehicle and provided at the foot of a driver's seat (both not shown). The accelerator pedal 4 operates the throttle valve 2 when the driver steps on the accelerator pedal. The vehicle is opened and closed to increase or decrease the speed of the vehicle.

Reference numeral 5 denotes an accelerator operation amount detecting device which detects an operation amount of the accelerator pedal 4. The accelerator operation amount detecting device 5 is located, for example, near the accelerator pedal 4 in an engine room (not shown) of the vehicle. As shown in FIG. 2, the casing 6, the adjusting screw 8, and the rotating shaft 1
0, a wire drum 11, a stopper plate 13, a buffer 14, a rotation angle sensor 15, and the like.

Reference numeral 6 denotes a casing of the accelerator operation amount detecting device 5. The casing 6 includes a base 6A, a one-sided arm 6B erected on one end of the base 6A, and the other of the base 6A. It is formed in a U-shape as a whole by the other arm portion 6C erected on the end side, and the one arm portion 6B has
As shown in FIG. 3, a spring hook portion 6D is provided on which a return spring 12 described later is hooked. In addition, one side arm 6
B, a rotation angle sensor 15 is attached, and the other arm 6C is provided with an initial position regulating projection 7 described later, as shown in FIGS.
And the fully open position regulating projection 9 are integrally provided.

Reference numeral 7 denotes an initial position restricting projection provided on the upper end side of the other arm 6C of the casing 6, and the initial position restricting projection 7 protrudes as a part of the casing 6.
As shown in FIG. 6, the initial position regulating projection 7 is provided with an adjusting screw 8 as a projection that comes into contact with the claw 13 </ b> A of the stopper plate 13. The initial position restricting projection 7 defines an initial position of the rotating shaft 10 via the stopper plate 13. Adjustment screw 8
Is to adjust the initial position of the rotating shaft 10 by being rotated in an arbitrary direction.

Further, reference numeral 9 denotes a fully open position regulating projection provided at an intermediate height position of the other arm 6C. The fully open position regulating projection 9 projects as a part of the casing 6 similarly to the initial position regulating projection 7. Have been. Then, the fully open position regulating protrusion 9
Defines the fully open position of the rotating shaft 10 via the stopper plate 13.

Reference numeral 10 denotes a rotating shaft which is rotated in accordance with the operation amount of the accelerator pedal 4. The rotating shaft 10 is rotatably connected to the arms 6B and 6C of the casing 6 via bearings (not shown). Supported as possible. As shown in FIGS. 4 and 5, chamfered portions 10A, 10A are formed near one side of the rotating shaft 10, and the wire drum 11 and the stopper plate 13 are detented on each of the chamfered portions 10A. It is fitted in the state. further,
One end of the rotation shaft 10 is connected to a rotation angle sensor 15, and the other end is connected to a hiss generator (not shown) that gives frictional resistance when the accelerator pedal 4 is operated.

Reference numeral 11 denotes a wire drum provided on the outer peripheral side of the rotating shaft 10. The wire drum 11 is provided with each chamfered portion 10A.
Fitting hole 11A fitted to the rotating shaft 10 in a state of being engaged with
Is formed, two arms 11C and 11D that bend and extend from the outer circumference of the mounting plate 11B, a spring hook 11E protruding from the outer circumference of the mounting plate 11B, and the arm 11C. , 11D fixed to the tip side of the drum 1
1F. Drum unit 1
In 1F, a wire connection hole 11G to which a wire 16 described later is connected is formed.

As described above, the wire drum 11 is disposed on the outer peripheral side of the rotating shaft 10 by fitting the fitting hole 11A to the rotating shaft 10. The wire drum 11 is connected to the wire 1 connected to the wire connection hole 11G.
When the rotary shaft 10 is rotated, the rotary shaft 10 is rotated together with the wire drum 11.

Reference numeral 12 denotes a return spring disposed on the outer peripheral side of the rotating shaft 10. The return spring 12 has its base end hooked on a spring hook 6D of the casing 6, and its distal end is spring hooked on the wire drum 11. It is hooked on the part 11E. As a result, the return spring 12 constantly urges the wire drum 11 in a direction opposite to the rotation direction when the accelerator pedal 4 is depressed. Then, when the driver releases the accelerator pedal 4 depressing operation, the return spring 12
The accelerator pedal 4, the rotating shaft 10 and the like are returned to the initial positions.

Reference numeral 13 denotes a stopper plate which abuts on the other side surface of the wire drum 11 and is provided on the rotating shaft 10 so as not to rotate. The stopper plate 13 protrudes radially outward and has a distal end in an L-shape. A claw portion 13A as a bent stopper is formed. Then, the stopper plate 13 rotates together with the rotating shaft 10 and the wire drum 11, and the claw portion 13 </ b> A abuts on the initial position regulating protrusion 7 or the fully open position regulating protrusion 9, whereby the rotating shaft 10 is rotated. The rotation range is restricted to approximately 90 degrees.

Reference numeral 14 denotes a claw portion 13A of the stopper plate 13.
The cushioning member as a cushioning member attached to the
As shown in FIG. 7, reference numeral 4 denotes a mounting cylinder portion 14A formed in a substantially rectangular cylindrical shape having a rectangular cross section, and a pair of cushions extending in parallel from the end surface of the mounting cylinder portion 14A toward the initial position regulating projection 7. The notch 1 formed in the mounting cylinder 14A so as to correspond to the adjusting screw 8 between the pieces 14B, 14B and the cushioning piece 14B.
4C, and the buffer 14 is formed of an elastic rubber material or the like. Also, the buffer 14
Is the claw portion 1 of the stopper plate 13 in the mounting cylinder portion 14A.
By inserting the 3A tip, the stopper plate 1
3 attached.

Here, each buffer piece 14B of the buffer 14 is
The stopper plate 13 is rotated in the direction indicated by the arrow D in FIG. 6 together with the rotation shaft 10 and the like by the urging force of the return spring 12, and the claw portion 13A of the stopper plate 13
When the claw portion 13A approaches the adjusting screw 8, the claw portion 13A elastically bends and abuts on the initial position regulating projection 7 to reduce the impact at this time. In addition, each buffer piece 1
4B, after being brought into contact with the initial position restricting projection 7, is largely bent as shown in FIG. Abuts through. On the other hand, each buffer piece 14B
As shown in FIG. 9, the stopper plate 13 has an arrow C
When it is rotated in the direction, it extends and returns to the initial state.

Reference numeral 15 denotes a rotation angle sensor serving as rotation detection means attached to one arm 6B of the casing 6, and the rotation angle sensor 15 slides on an end of the rotation shaft 10 on a resistor. It has a detection lever that moves (neither is shown). When the detection lever rotates and slides on the resistor, the rotation displacement of the rotation shaft 10 is detected as a voltage, and this detection signal is transmitted to the control unit 17 described later as the operation amount of the accelerator pedal 4. Output.

Reference numeral 16 denotes a wire (shown in FIG. 1) whose base end is connected to the accelerator pedal 4, and the front end of the wire 16 is wound around the drum portion 11 F of the wire drum 11, and its front end is connected to the wire. It is connected to the hole 11G. Thereby, the wire 16 rotates the wire drum 11 and the rotating shaft 10 in accordance with the depression operation of the accelerator pedal 4.

Reference numeral 17 denotes a control unit constituted by a microcomputer or the like. The control unit 17 has an input side connected to the rotation angle sensor 15 and an output side connected to the throttle actuator 3. Then, the control unit 17 includes the rotation angle sensor 15.
A drive signal corresponding to the detection signal is output to the throttle actuator 3, and the throttle actuator 3 opens and closes the throttle valve 2 at an opening corresponding to the operation amount of the accelerator pedal 4. As a result, the amount of air taken into each cylinder (not shown) of the engine is increased or decreased according to the opening of the throttle valve 2, and the engine speed is accelerated or decelerated.

The accelerator operation amount detecting device 5 according to the present embodiment has the above-described configuration, and the operation thereof will be described below.

First, when the driver depresses the accelerator pedal 4 in the direction of arrow A in FIG.
In the direction of rotation and the rotating shaft 10 together with the wire drum 11.
Is rotated in the direction of arrow C. At this time, the rotation angle sensor 15 detects the rotation displacement of the rotation shaft 10 as an operation amount of the accelerator pedal 4, and outputs a detection signal to the control unit 17.

The control unit 17 outputs a drive signal to the throttle actuator 3 based on the detection signal from the rotation angle sensor 15, and controls the opening and closing of the throttle valve 2 by the throttle actuator 3.

In the accelerator operation amount detecting device 5, when the depressing operation force on the accelerator pedal 4 is released, the wire drum 11 rotates in the direction indicated by arrow D opposite to the direction indicated by arrow C by the spring force of the return spring 12. As a result, the claw portion 13A of the stopper plate 13 approaches the initial position regulating protrusion 7.

At this time, each buffer piece 14B of the buffer 14 attached to the claw portion 13A comes into contact with the initial position regulating projection 7, thereby reducing the impact at the time of collision and suppressing the hitting sound. Moreover,
Each buffering piece 14B is largely bent by the urging force of the return spring 12, and the claw 13A directly comes into contact with the adjusting screw 8 of the initial position regulating projection 7 via the cutout 14C. It can be regulated (stopped) accurately at the position.

As described above, according to the present embodiment, the buffer 14 is provided on the claw portion 13A of the stopper plate 13,
The claw portion 13A and the initial position regulating protrusion 7 are
The hitting sound due to the collision can be suppressed. Moreover, the rotation of the rotation shaft 10 is accurately regulated at the initial position by bending each buffering piece 14B of the buffering body 14 and bringing the claw portion 13A into contact with the adjusting screw 8 of the initial position regulating projection 7. be able to.

Thus, noise at the time of operating the accelerator can be suppressed, and the quietness of the accelerator operation amount detecting device 5 can be improved. In addition, by suppressing the impact due to the collision, the initial position regulating protrusion 7 and the stopper plate 13 are prevented.
Wear and damage can be prevented, the durability can be increased, and the life can be prolonged.

Further, since the rotation of the rotation shaft 10 can be accurately regulated at the rotation regulation position on the initial position side, the positioning accuracy of the throttle valve 2 at the minimum rotation position is increased and the idling rotation is stabilized. And the reliability of the accelerator operation amount detection device 5 can be improved.

Next, FIGS. 10 to 12 show the second embodiment of the present invention.
The feature of the present embodiment is that the cushioning member is constituted by an elastic cylinder provided on the outer peripheral side of the adjusting screw. In this embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals,
The description is omitted.

Reference numeral 21 denotes a buffer 14 according to the first embodiment.
In the present embodiment, a buffer cylinder is used as a buffer member according to the present embodiment, and the buffer cylinder 21 is, as shown in FIG.
It is formed in a cylindrical shape with an elastic rubber material or the like. The buffer cylinder 21 is arranged on the outer peripheral side of the adjusting screw 8, and its base end is fixed to the initial position regulating projection 7 by fixing means such as adhesion or welding. Also, the buffer cylinder 2
1 is provided so as to protrude from the adjusting screw 8, whereby
Before the claw portion 13A comes into contact with the adjusting screw 8, the claw portion 13A elastically bends and comes into contact with the initial position regulating projection 7, thereby reducing the impact.
In addition, as shown in FIG. 12, the buffer cylinder 21 can be brought into contact with the adjusting screw 8 and the claw portion 13 </ b> A of the stopper plate 13 by being largely bent.

Thus, in the present embodiment configured as described above, substantially the same operation and effect as those of the first embodiment can be obtained. In particular, according to the present embodiment, the cushioning member is provided. Since the cylindrical buffer cylinder 21 is used, the configuration of the buffer member can be simplified, and the productivity can be improved and the manufacturing cost can be reduced.

In the first embodiment, the buffer 14
Although the case where the respective buffer pieces 14B are provided facing the initial position regulating protrusion 7 has been described as an example, the present invention is not limited to this.
For example, the buffer piece 14B of the buffer 14 may be provided to face the full-open position regulating projection 9.
The buffer pieces 14 </ b> B may be provided to both the initial position regulating protrusion 7 and the fully open position regulating protrusion 9.

Further, in the second embodiment, the case where the buffer cylinder 21 is fixed to the initial position regulating projection 7 has been exemplified.
Instead of this, for example, the buffer cylinder 21 may be provided on the fully open position regulating projection 9, or the buffer cylinder 21 may be provided on both the initial position regulating projection 7 and the fully open position regulating projection 9.

In each embodiment, the wire drum 1
Although the stopper plate 13 is provided separately from the stopper plate 13 and the claw portion 13A serving as a stopper is formed on the stopper plate 13 as an example, the present invention is not limited to this. For example, two points shown in FIG. As shown by a chain line, a configuration may be adopted in which a claw portion 31 serving as a stopper is provided on the outer peripheral side of the wire drum 11. In this case, the stopper plate 13 can be omitted.

Further, in each of the embodiments, the case where the adjusting screw 8 is used as the projection has been described as an example. Alternatively, for example, a pin may be fitted to the initial position regulating projection 7 as the projection. Alternatively, the protrusion may be provided integrally as a part of the casing 6.

[0048]

As described in detail above, according to the first aspect of the present invention, a cushioning member is provided between the casing and the stopper so as to elastically bend when the stopper approaches the casing. The rotating shaft is rotated together with the wire drum by operating the accelerator pedal, and when the stopper provided on the rotating shaft approaches the casing, the buffer member is elastically bent to the member on the other side to abut. In this case, the impact at this time can be reduced, and the tapping sound can be suppressed. As a result, silence during operation can be improved, wear and damage due to collision can be prevented, and durability can be increased to extend the life.

According to the second aspect of the present invention, a projection is provided on the casing, and the cushioning member is provided with a buffer piece provided on the stopper and protruding toward the casing, and a notch provided at a position corresponding to the projection. When the stopper approaches the casing, the cushioning piece can be elastically bent to the member on the other side before the stopper comes into contact with the projection, and can be brought into contact with the member. The impact at the time can be reduced, and the tapping sound can be suppressed. As a result, silence during operation can be improved, wear and damage due to collision can be prevented, and durability can be increased to extend the life.

Further, since the stopper can be brought into contact with the projection through the cutout portion by bending the cushioning piece, the rotation range of the rotation shaft can be accurately regulated at this position. The positioning accuracy can be increased and the reliability can be improved.

According to the third aspect of the present invention, the projection is provided on the casing, and the cushioning member is constituted by the elastic cylinder provided on the outer peripheral side of the projection. Prior to the stopper abutting on the protrusion, the elastic cylinder can be elastically bent to the member on the other side to make contact with the member, and the impact at this time can be reduced to suppress the tapping sound. As a result, silence during operation can be improved, wear and damage due to collision can be prevented, and durability can be increased to extend the life.

Further, since the stopper can be brought into contact with the projection in the elastic cylinder by bending the elastic cylinder, the rotation range of the rotation shaft can be accurately regulated at this position. The positioning accuracy can be increased and the reliability can be improved.

According to the fourth aspect of the present invention, since the protrusion is formed by the adjustable screw, the rotation range of the rotation shaft can be easily adjusted by rotating the screw in an arbitrary direction. it can.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an accelerator operation amount detection device according to a first embodiment of the present invention together with an accelerator pedal and the like.

FIG. 2 is a front view showing the accelerator operation amount detection device in FIG. 1;

FIG. 3 is a plan view showing an accelerator operation amount detection device.

FIG. 4 is a cross-sectional view showing a state in which a claw portion of a stopper plate is in contact with an initial position regulating protrusion, as viewed from the direction of arrows IV-IV in FIG. 2;

FIG. 5 is a cross-sectional view showing a state in which a claw portion of a stopper plate is in contact with a fully-open position regulating protrusion, as viewed from the same position as in FIG. 4;

FIG. 6 is a partially broken external perspective view showing an enlarged view of an initial position regulating protrusion, a stopper plate, a buffer, and the like.

FIG. 7 is an external perspective view showing the buffer according to the first embodiment in an enlarged manner.

FIG. 8 is an enlarged view of a main part showing a state in which a buffer piece of a buffer body is bent so that an adjusting screw of an initial position regulating projection and a claw portion of a stopper plate are in contact with each other.

FIG. 9 is an enlarged view of a main part as viewed from the same position as in FIG. 8, showing a state in which the buffer is separated from the initial position regulating protrusion.

FIG. 10 is an enlarged view of a main part viewed from the same position as in FIG. 8, showing a state in which the shock-absorbing cylinder according to the second embodiment of the present invention is separated from the initial position regulating protrusion.

FIG. 11 is an external perspective view showing an enlarged view of a shock-absorbing cylinder according to a second embodiment.

FIG. 12 is an enlarged view of a main part as viewed from the same position as in FIG. 8, showing a state in which an adjusting screw of an initial position regulating projection is brought into contact with a claw portion of a stopper plate by bending a buffer cylinder.

[Explanation of symbols]

 Reference Signs List 4 Accelerator pedal 5 Accelerator operation amount detecting device 6 Casing 7 Initial position regulating protrusion 8 Adjusting screw (projection) 9 Fully open position regulating protrusion 10 Rotating shaft 11 Wire drum 13 Stopper plate 13A, 31 Claw (stopper) 14 Buffer 14A Mounting tube part 14B Buffer piece 14C Cut part 15 Rotation angle sensor (rotation detection means) 16 Wire 21 Buffer cylinder

Claims (4)

[Claims] 1. A casing, a rotating shaft rotatably provided on the casing, a wire drum connected to an accelerator pedal provided on the rotating shaft via a wire, and the wire drum. A stopper provided on the rotating shaft or the wire drum for rotating to restrict the rotating range of the rotating shaft by abutting on the casing, and an accelerator operation provided on the casing to adjust a rotating amount of the rotating shaft. In the accelerator operation amount detection device constituted by rotation detection means for detecting the amount, a cushioning member elastically bent when the stopper approaches the casing is provided between the casing and the stopper. An accelerator operation amount detection device, characterized in that: 2. A projection is provided on the casing, the cushioning member includes a buffering piece provided on the stopper and protruding toward the casing, and a notch provided at a position corresponding to the projection. The accelerator operation amount detecting device according to claim 1, wherein the accelerator operation amount detecting device is constituted by: 3. The accelerator operation amount detecting device according to claim 1, wherein a projection is provided on the casing, and the cushioning member is constituted by an elastic cylinder provided on an outer peripheral side of the projection. 4. The accelerator operation amount detecting device according to claim 2, wherein the protrusion is constituted by an adjustable screw.