JP3605338B2 - Electronic accelerator pedal device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic accelerator pedal device provided with an accelerator opening sensor for detecting an accelerator opening.
[0002]
[Prior art]
Conventionally, as an accelerator pedal device that electrically transmits the opening of the accelerator pedal to the throttle valve without passing through a link such as a wire, an accelerator opening sensor is installed near the accelerator pedal, and according to the pedal depression amount An accelerator pedal device having a structure for rotating an accelerator opening sensor has been proposed in Japanese Patent Application Laid-Open No. 9-52541.
[0003]
In this type of conventional accelerator pedal device, an accelerator pedal arm is rotatably supported on a bracket via a support shaft, a return spring is externally fitted on the support shaft, and the accelerator pedal is turned on the bracket on the distal end side of the arm. The moving part is supported by a shaft, and an accelerator opening sensor is provided at the end of the rotating part by connecting the shaft. Further, a cable receiving portion is attached to the rotating portion, a wire is connected between the cable receiving portion and the pedal arm, and the rotating portion is rotated according to the amount of depression of the accelerator, and the accelerator opening sensor detects the accelerator position. It is configured to output a signal indicating the opening.
[0004]
[Problems to be solved by the invention]
However, in this accelerator pedal device, although the pedal arm and the rotating portion are connected via a wire, the pedal wire has a lower drag resistance than an ordinary accelerator pedal device connected to a throttle valve via an accelerator wire. However, there is a problem that the accelerator pedal moves too lightly because the rotation resistance of the rotation part is small. In other words, when the accelerator pedal is depressed, the rotating part moves rapidly, and the vehicle is apt to rapidly increase in speed. When the accelerator pedal is released, the accelerator pedal and the rotating part return rapidly, and There is a problem that the vehicle is easily decelerated rapidly and the operability of the accelerator is deteriorated.
[0005]
[Means for Solving the Problems]
The present invention is based on the above conventional technology, in view of the problem of poor operability of the accelerator, fixed to the chassis side, a fixed body having a pair of brackets, a pedal arm and a lever intersected between the brackets, At a crossing point of the pedal arm and the lever, the penetrating hole is formed so as to be laterally penetrated, integrated with the pedal arm and through an insertion hole formed in the lever, and rotatably loosely fitted into a shaft support hole formed in the bracket. A supported support shaft, a compression spring portion provided between the pedal arm and the upper end of the lever for bringing the base end of the lever into contact with the chassis, and an accelerator mounted on the bracket in accordance with the rotation angle of the support shaft An electronic accelerator pedal device including an accelerator opening sensor that generates a signal indicating the opening is attached to a lower part of a driver's seat.
When the driver depresses the accelerator pedal, the pedal arm rotates around the support shaft while compressing the compression spring portion, and when the driver releases his / her foot from the accelerator pedal, the pedal arm moves to the compression spring portion. Due to the elastic restoring force, the support shaft is rotated in the counter-depressing direction about the support shaft, and when the support shaft is rotated when the accelerator pedal is operated, the support shaft presses the shaft support hole of the bracket and the lever insertion hole presses the support shaft against the support shaft. As a result, a moderate frictional resistance is generated in the rotation of the support shaft, and a stable operability of the accelerator, which gradually changes, is obtained in the same manner as the conventional accelerator pedal system in which the accelerator wire is connected between the throttle valve and the throttle valve. In order to solve the above problems,
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of an electronic accelerator pedal device according to the present invention, FIG. 2 is a side view of the electronic accelerator pedal device with one bracket removed, and FIG. FIG. 4 is an enlarged front view of a compression spring portion having a double spring structure, and FIG. 5 is a sectional view of a compression spring portion in which two compression springs are arranged in parallel. It is an enlarged front view.
As shown in FIGS. 1 and 2, the electronic accelerator pedal device 1 basically includes a fixed body 3 to a chassis S having a pair of brackets 2 and 2 a, and a length intersected between the brackets 2 and 2 a. A small pedal arm 4 and a short lever 5 penetrate the intersection of the pedal arm 4 and the lever 5, and both ends are loosely fitted into shaft support holes 6 and 6a formed in the brackets 2 and 2a. A support shaft 7, an accelerator pedal 8 fixed to the pedal arm 4, a compression spring portion 9 provided between the pedal arm 4 and the upper end of the lever 5, and an accelerator opening sensor installed on the side of the fixed body 3. And 10.
[0007]
The fixed body 3 is formed in the shape of a box with a lower opening, and brackets 2 and 2a are provided on both sides of the fixing member 11 to the chassis S, and one of the brackets 2 and 2a (one in the drawing, The bracket 2) is detachable from other portions of the fixed body 3, and the shaft support holes 6 and 6a of the brackets 2 and 2a are slightly larger than the support shaft 7 as shown in FIG. Diameter.
[0008]
As shown in FIG. 3, the support shaft 7 is formed integrally with the pedal arm 4 and is freely penetrated through an insertion hole 12 formed in the lever 5.
[0009]
Further, fixed seat portions 13 and 14 at both ends of the compression spring portion 9 are provided at the distal ends of the pedal arm 4 and the lever 5.
Further, the compression spring portion 9 has a double spring structure composed of two compression springs 15 and 15a having different diameters as shown in FIG. 4, or a two-spring structure as shown in FIG. Are arranged in parallel between the upper ends of the pedal arm 4 and the lever 5.
[0010]
Further, as shown in FIG. 2, the distal end side of the pedal arm 4 in the initial state is brought into contact with the chassis S side, that is, the fixing member 11 of the fixed body 3, due to the elastic restoring force of the compression spring portion 9. Although not shown, an intermediate portion of the pedal arm 4 may be brought into contact with a portion of the opening in the fixed body 3 facing the chassis S.
Further, the elastic restoring force of the compression spring portion 9 causes the base end side of the lever 5 to always contact the chassis S side, that is, the fixing member 11 of the fixed body 3, and the contact portion 16 of the lever 5 with the fixed body 3 Are formed in a circumferential surface shape, and a receiving groove 17 having a concave curved surface is formed in a contact portion of the fixing member 11 with the contact portion 16 of the lever 5.
[0011]
This accelerator pedal device is attached to a lower part of a driver's seat in a room by fixing a fixed body 3 with a fixing screw or the like, similarly to a normal automobile, and an accelerator opening sensor 10 is connected to a control processing circuit via an electric connection line. The throttle valve driving device is connected to the output side of the control processing circuit.
[0012]
Next, the operation of the electronic accelerator pedal device according to the present invention will be described.
When the driver steps on the accelerator pedal 8, the pedal arm 4 rotates together with the support shaft 7 while compressing the compression spring 9.
At this time, the tip of the pedal arm 2 tilts in the direction opposite to the direction in which the accelerator pedal 8 is depressed, and the support shaft 7 is pivotally supported by the shaft support holes 6 and 6a by the depression force of the accelerator pedal 8 and the elastic restoring force of the compression spring portion 9. And the inner peripheral surface of the insertion hole 12 of the lever 5 is pressed by the support shaft 7, and frictional resistance is generated in each part, so that the operability of the accelerator pedal 8 is improved. Is well retained.
When the vehicle is driven at a constant speed, the position must be maintained while being depressed by a predetermined amount, but the elastic restoring force of the compression spring portion 9 does not directly act on the accelerator pedal 8 and the support shaft 7 and the shaft support hole The inner peripheral surfaces of the inner peripheral surfaces 6 and 6a and the inner peripheral surface of the insertion hole 12 of the lever 5 and the pressing portion of the support shaft 7 are reduced by the frictional resistance and act on the accelerator pedal 8, so that the accelerator pedal 8 is kept at a fixed position. It is easier to maintain.
The accelerator opening sensor 10 outputs a voltage signal corresponding to the rotation angle of the support shaft 7 rotated by an angle corresponding to the depression amount of the accelerator pedal 8, and the sensor output signal is used for controlling the throttle valve drive. Is done.
[0013]
On the other hand, when the driver releases his / her foot from the accelerator pedal 8, the pedal arm 4 rotates in the anti-stepping direction around the support shaft 7 by the elastic restoring force of the compression spring portion 9, but the support shaft 7 Since the inner peripheral surfaces of the holes 6 and 6a are pressed by the portion on the chassis S side on the inner peripheral surface and the inner peripheral surface of the insertion hole 12 of the lever 5 is pressed by the support shaft 7, the pedal arm 4 does not return quickly.
At this time, the accelerator opening sensor 10 outputs a voltage signal corresponding to the rotation angle of the support shaft 7 rotated by an angle corresponding to the return amount of the accelerator pedal 8.
[0014]
【The invention's effect】
In short, according to the present invention, since the fixed body 3 having the pair of brackets 2 and 2a fixed to the chassis S is provided, the work of attaching the electronic accelerator pedal device 1 to the chassis S is simplified. I can do it.
Further, the support shaft 7 traversing the intersection of the pedal arm 4 and the lever 5 intersected between the brackets 2 and 2a is integrated with the pedal arm 4 and plays through the insertion hole 12 formed in the lever 5. The pedal arm 4 and the lever 5 are both rotatably attached to the fixed body 3 because they are rotatably loosely fitted and supported in the shaft supporting holes 6 and 6a formed in the brackets 2 and 2a. I can do it.
Further, since the support shaft 7 is integrated with the pedal arm 4, the support shaft 7 rotates in conjunction with the pedal arm 4, so that the rotation angle of the support shaft 7 is determined by the amount of depression of the pedal arm 4. The vehicle can be driven at an appropriate speed via the accelerator opening sensor 10.
Further, since the support shaft 7 passes through the insertion hole 12 formed in the lever 5, the lever 5 does not rotate even if the support shaft 7 rotates. It can act on the arm 4.
In addition, since the compression spring portion 9 is provided between the upper ends of the pedal arm 4 and the lever 5 and the base end of the lever 5 is brought into contact with the chassis S, the compression spring portion 9 that has been compressed and deformed can be resiliently restored. The pedal arm 4 can be automatically returned to the initial position simply by releasing the foot from the pedal arm 4 that has been depressed, and the support shaft 7 is connected to the shaft support holes 6 and 6 a by the elastic restoring force of the compression spring portion 9. Since the inner peripheral surface of the insertion hole 12 of the lever 5 is pressed against the support shaft 7 on the inner peripheral surface of the lever 5 and a frictional resistance is generated in the pressed portion, a rapid change of the accelerator pedal 8 can be suppressed. Its practical effect is extremely large, for example, it can prevent sudden acceleration and deceleration of a car.
[Brief description of the drawings]
FIG. 1 is a front view of an electronic accelerator pedal device according to the present invention.
FIG. 2 is a side view of the electronic accelerator pedal device with one bracket removed.
FIG. 3 is a cross-sectional view showing a mounting state of a pedal arm, a lever, and a support shaft to a bracket.
FIG. 4 is an enlarged front view of a compression spring portion having a double spring structure.
FIG. 5 is an enlarged front view of a compression spring portion in which two compression springs are arranged in parallel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electronic accelerator pedal device 2, 2a Bracket 3 Fixed body 4 Pedal arm 5 Lever 6, 6a Shaft support hole 7 Support shaft 9 Compression spring part 10 Accelerator opening sensor 12 Insertion hole S Chassis

Claims (1)

A fixed body having a pair of brackets fixed to the chassis side, a pedal arm and a lever intersectingly arranged between the brackets, and transversely intersecting the intersection of the pedal arm and the lever, and integrated with the pedal arm The lever is provided between the upper end of the pedal arm and the lever, and a support shaft that is loosely fitted and supported rotatably in a shaft support hole formed in the bracket through a through hole formed in the lever. A compression spring portion for bringing the base end portion into contact with the chassis side; and an accelerator opening sensor attached to the bracket, which generates a signal indicating the accelerator opening according to the rotation angle of the support shaft. Electronic accelerator pedal device.

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