JPS6349554Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an accelerator pedal device for an engine in which the amount of fuel supplied is electrically controlled.

[Conventional technology]

In engines equipped with electronic fuel injection control devices, there is no mechanical connection between the accelerator pedal and the component that directly controls the amount of fuel supplied (the throttle valve in gasoline engines, the fuel control lever of the fuel injection pump in diesel engines). However, there is a problem in that the operating resistance of the accelerator pedal is very small, which makes driving more nerve-wracking and tiring.

As disclosed in Utility Model Application Publication No. 56-170040,
There are some models that connect a thick annular torsion rubber between the cylindrical part on the vehicle body side and the shaft part of the accelerator link, and the friction of this torsion bar applies operational resistance to the accelerator pedal, but this is due to the selection of torsion rubber. Since it is difficult to make adjustments after installation and cannot be adjusted after installation, it is inevitable that performance will deteriorate due to deterioration of the torsion rubber after long-term use.

In addition, as disclosed in Japanese Utility Model Publication No. 56-3538, one link that is connected to each other is provided with a tapered hole, while the other link is connected with a tapered shaft, and the tapered shaft is tightly fitted into the tapered hole by a spring. Although a large frictional resistance can be obtained with the tapered friction surface, it is difficult for wear particles to escape from the tapered friction surface, and the friction surface is extremely unstable due to infiltration of dust from the outside, and becomes abnormal when not used for a long period of time. Frictional resistance may increase.

[Problem that the invention attempts to solve]

An object of the present invention is to provide an accelerator pedal device that is easy to assemble, can adjust operating resistance, maintains stable resistance at all times, and is durable.

[Means for solving problems]

In order to achieve the above object, the present invention has a structure in which a pedal arm is connected to a rotating shaft rotatably supported by a bush on a base frame, and a non-rotatable shaft that is fixed to the base frame with a detent piece. A pair of friction disks that can be slid in the axial direction but cannot be rotated relative to each other are supported externally with the disks sandwiched between them, and a spring seat supported at the end of the rotating shaft and one of the friction disks are provided. The friction disc and the disc are pressed against the bush by an interposed spring.

[Effect]

A friction disk 9 that can rotate together with the rotation shaft 13 integrated with the pedal arm and slide in the axial direction is attached to the base frame 8.
The accelerator pedal 7 is pressed by a spring 10 against a disc 14 which is held unrotatably, and the friction between the disc 14 and the friction disc 9 applies operational resistance to the accelerator pedal 7. The frictional resistance can be adjusted freely by the set load of the spring 10.

[Example of idea]

As shown in FIG. 1, a base frame 8 fixed to the floor of the driver's seat is constructed by bending a steel plate into a U-shaped cross section, and a pivot shaft 13 connecting the pedal arm 6 to side walls 8a that are parallel to each other is a bushing. Supported by 5. The base end of the pedal arm 6 is connected to the pedal 7, while the distal end thereof is bent at a substantially right angle and engaged with an operating member of the accelerator sensor 1, as will be described later.

A return spring 17 is wound around the rotation shaft 13, and one end of the return spring 17 is engaged with the pedal arm 6, and the other end is engaged with the side wall 8a of the base frame 8. The force of the return spring 17 causes the pedal 7 to spring up from the floor, and the stopper 4 connected to the pedal arm 6 abuts against the idle switch 3. The stopper 4 is made of an L-shaped plate material connected to the distal end side of the pedal arm 6, and a contact piece 4a abuts against a contact point of the idle switch 3. The idle switch 3 is fixed to the inner surface of the side wall 2a of the frame 2, which is made of a plate bent into an inverted U shape. The frame 2 is joined to the base frame 8 by welding, and the accelerator sensor 1 is supported on the end wall of the frame 2 by bolts 15.

As shown in FIG. 2, an engagement member 2 made of a U-shaped bent plate is attached to the tip 6a of the pedal arm 6.
0 is connected by welding, and this is engaged with a pin 21 connected to a rod 22 with an appropriate spacing.

The rod 22 constitutes a movable member of the accelerator sensor 1, and is connected to the movable part of the accelerator sensor 1, for example, if it is a potentiometer. However, such a configuration is well known and is not directly related to the gist of the present invention, so it will not be further described.

According to the present invention, in order to provide an appropriate sense of resistance to the operation of the pedal arm 6, as shown in FIG.
A disk 14 is disposed on the left side wall 8a of the base frame 8. A locking piece 14a protruding from the outer circumferential side of the disc 14 and bent at a right angle is engaged with a hole 18 (FIG. 2) provided in the side wall 8a of the base frame 8. The rotating shaft 13 is rotatably inserted through the disc 14, and a pair of friction discs 9 are arranged on both sides of the disc 14.

The friction disk 9 is integrally constructed of a suitable friction material and a back metal, and is supported by the rotating shaft 13 so that it can slide in the axial direction but cannot rotate relative to it. For this reason, the rotation axis 1
The shaft portion 3 supporting the friction disk 9 has a rectangular cross section, for example, and is inserted into a square hole in the friction disk 9.

A spring 1 is placed between one friction disk 9 and a spring seat 12.
0 is inserted. The spring seat 12 is fitted onto the rotating shaft 13, and its position can be adjusted using the nut 11.

In the configuration described above, the pair of friction discs 9 and 14 are brought into contact with each other by the spring 10 and pressed against the end face of the bush 5. Therefore, when the pedal 7 is depressed and the rotation shaft 13 is rotated, there is a gap between the pair of friction disks 9 that rotate together with the rotation shaft 13 and the disk 14 supported by the base frame 8. Sliding friction occurs, giving the driver a moderate sense of resistance. The frictional resistance is adjusted by turning the nut 11 to change the load on the spring 10.

When driving the vehicle at a constant speed, even if the pedal force applied to the pedal 7 is slightly reduced due to the friction between the friction disc 9 and the disc 14, the pedal arm 6 will not be pushed back by the return spring 17, and the driving will be stopped. Fatigue is reduced.

As shown by line 30 in FIG. 3, when the friction disk 9 is not attached, the amount of operation (amount of rotation) of the pedal arm 6 is determined primarily by the operation force that deflects the return spring 17, but the friction disk By arranging 9,
For acceleration operation, press pedal 7 as shown by line 31.
The pedal arm 6 will not operate unless an extra force is applied to resist the friction between the friction disc 9 and the disc 14, and in the case of deceleration operation, the force applied to the pedal 7 is returned by the spring as shown by line 32. The pedal arm 6 will not operate unless the return force 17 is further reduced by the amount of frictional resistance. In the end, in order to drive at a constant speed, the pedal arm 6
Even if the force applied to the pedal 7 changes when the pedal is held at a certain position, the pedal arm 6 will not rotate if the amount of change is smaller than Δf.

[Effect of idea]

As described above, the present invention has a rotating shaft that connects the pedal arm and is rotatably supported by a bush on the base frame, and a non-rotatable disc that is fixed to the base frame with a rotation stopper piece. , a pair of friction disks that can be slid in the axial direction but cannot rotate relative to each other are supported externally, and a spring is interposed between the spring seat supported at the end of the rotating shaft and one of the friction disks. , the friction disk and the disk are pressed against the bushing, and since the pair of friction disk and the non-rotatable disk are slidable along the rotation axis,
Abrasion powder is easily removed, a stable contact state between the disk and the friction disk is obtained, stable frictional resistance is obtained, and driver fatigue is reduced.

All the constituent members can be press-formed, there are no machined parts, and assembly is simple, which is advantageous in terms of cost.

Since the pressing force of the friction disk against the disk is adjusted by the set load of the spring, stable performance is maintained over a long period of time and excellent durability is achieved.

[Brief explanation of the drawing]

FIG. 1 is a front view of an accelerator pedal device according to the present invention, FIG. 2 is a left side view of the same, and FIG. 3 is an operating characteristic diagram of the device. 1... Accelerator sensor, 6... Pedal arm,
7...Pedal, 8...Base frame, 9...Friction disc, 1
0... Spring, 12... Spring seat, 13... Rotation shaft,
14...disc, 17...return spring.

Claims (1)

[Scope of utility model registration request] A rotating shaft connected to the pedal arm and rotatably supported by a bushing on the base frame is provided with a non-rotatable disk fixed to the base frame by a rotation stopper, so that the shaft can be slid in the axial direction and is relatively rotatable. A pair of friction disks that cannot be rotated are supported by extrapolation, and a spring inserted between one of the friction disks and a spring seat supported at the end of the rotating shaft is used to connect the friction disks. An accelerator pedal device characterized by being pressed against a button.