JPH09164925A - Displacement detection device of vehicular brake pedal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the mounting easiness on a vehicle. SOLUTION: A brake pedal 40 is supported turnably and a rotary type potentiometer 60 is installed inside a bracket 30 fixed on a car body and connected to the brake pedal 40 so that the rotator of the potentiometer 60 can be interlocked and rotated with the turning of the brake pedal and the output electric potential of the potentiometer 60 is changed in accordance with the turning position change of the brake pedal 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake pedal displacement detection device.

[0002]

2. Description of the Related Art Anti-locking is based on the recognition that the brake pedal depressing force is insufficient when the driver rapidly depresses the brake pedal due to the sudden appearance of an obstacle in front of a traveling vehicle. In a braking system having a control function, a device has been proposed which monitors the stepping speed of a brake pedal and increases the braking force by power in response to the stepping speed of the brake pedal exceeding a predetermined threshold value. (For example, DE4
028290A1).

It is necessary to detect the displacement of the vehicle brake pedal in order to detect the depression speed of the vehicle brake pedal. As a conventional vehicle brake pedal displacement detecting device, it is known that a displacement detector that detects a linear displacement of a movable wall of a negative pressure type brake booster is attached to a housing of the brake booster so as to face the movable wall ( See, for example, DE 4011165A1).

[0004]

However, there is a problem in that the displacement detector as described in DE 4011165A1 cannot be attached to the hydraulic brake booster. In addition, by mounting a displacement detector on the negative pressure brake booster, the space required to mount the negative pressure brake booster increases, and the electric wiring space is also required.Many devices are installed in the engine room where the negative pressure brake booster is installed. Considering that it is done, there is a problem that it is difficult to spread.

An object of the invention of this application is to provide a displacement detecting device for a vehicle brake pedal, which solves the above problems.

[0006]

DISCLOSURE OF THE INVENTION A displacement detecting device for a vehicle brake pedal according to the invention of this application includes a vehicle brake pedal, which is rotatably assembled and fixed to a vehicle body. The displacement detector is mounted to output an electric signal corresponding to the rotation position of the vehicle brake pedal in association with the rotation.

The configuration of the displacement detector is not particularly limited, but a potentiometer having a rotor is preferable from the viewpoint of price and detection accuracy. This potentiometer
Offset the rotation center of the rotor from the rotation center of the brake pedal and attach it to the bracket to interlock with the brake pedal, or attach the bracket to the bracket so that the rotation center of the rotor is concentric with the rotation center of the brake pedal, and brake. Interlock with the pedal.

When the bracket is attached to the bracket so that the center of rotation of the rotor is concentric with the center of rotation of the brake pedal, the protrusion provided on the rotor is inserted into the protrusion insertion portion provided on the brake pedal, The protrusion and the protrusion insertion part shall not allow relative displacement between the protrusion and the brake pedal in the brake pedal rotation direction, and allow relative displacement between the protrusion and the brake pedal in the axial direction and radial direction of the brake pedal rotation center axis. It is preferable to form it. By doing so, it is possible to avoid deterioration in detection accuracy due to axial play and radial play existing in the support portion of the brake pedal.

As described above, in the invention of this application, since the displacement detector is mounted in the bracket, the brake booster can be applied to either a negative pressure type or a hydraulic type. Moreover, since the space in the bracket, which has not been used in the past, is used as the installation space for the displacement detector, it can be easily spread.

[0010]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the invention of this application will be described below.

1 to 5 show the first embodiment. In FIG. 1, the brake master cylinder 10 is connected to the left end of the negative pressure type brake booster 20 at its right end, and generates a brake fluid pressure corresponding to the output of the negative pressure type brake booster 20. The right end of the negative pressure type brake booster 20 is connected to the bracket 30, and the input rod 21 of the negative pressure type brake booster 20 is connected to the brake pedal 40.
Are rotatably connected to the The brake pedal 40 is rotatably connected to the bracket 30 at its upper end.

As is apparent from FIG. 2, the bracket 30 has a pair of side wall portions 31, 31 facing each other at a predetermined interval in a horizontal plane. Between the both side walls, a cylindrical bearing portion 41 at the upper end of the brake pedal 40 is arranged,
A sleeve 51 is rotatably inserted in the bearing portion 41 with bearing bushes 52, 52 interposed between the bearing 51 and the bearing portion 41, and a bolt 53 penetrating the sleeve 51 and the side walls 31, 31 and the bolt 53. Nut 54 screwed onto 53
The brake pedal 40 is rotatably supported by the bracket 30 by and.

Although not shown in FIG. 1, the bracket 30 is provided with a stopper for preventing the brake pedal 40 from rotating counterclockwise from the position shown in FIG. Is urged to rotate counterclockwise by a return spring.

Reference numeral 60 in FIGS. 1 and 2 denotes a potentiometer for outputting a potential corresponding to the rotational position of the brake pedal 40. The potentiometer 60 has a structure in which the mover rotates, and details of the structure are shown in FIGS.
Is indicated by As shown in FIG. 2, the potentiometer 60 is arranged between the side walls 31 of the bracket 30 such that its rotation axis is offset from the rotation axis of the brake pedal 40, and its case is at the upper side. Side wall 3
It is fixed to 1 by a bolt 55.

FIG. 3 is a longitudinal sectional view of the potentiometer 60, and FIG. 4 is a case portion 61b and a rotor 63 in FIG.
FIG. 5 is a view of the rotor 63 and the case portion 61a as viewed from the left side of FIG. Part 61
In the internal space of the case 61 formed by connecting a and 61b,
A substrate 62 fixed to the case and a rotor 63 rotatable with respect to the case are arranged. A pair of electric resistance layers 64 and 65 are formed on one surface of the substrate 62, and a conductive brush 66 that is in sliding contact with the electric resistance layers 64 and 65 is provided on the rotor 63. Both ends of the electric resistance layer 64 are connected to the power supply connection terminal 67 and the ground connection terminal 68, and the electric resistance layer 65 is connected to the output connection terminal 6
9 is connected.

As shown in FIGS. 1 and 2, an arm portion 70 extending in the radial direction is fixed to a bearing portion 41 of the brake pedal 40, and a tip end portion of the arm portion 70 is a bearing portion. A pin 71 extending in the axial direction of the portion 41 is fixed. The forked arm portion 63a of the rotor 63 of the potentiometer 60 is engaged with the pin 71, and the rotor 63 is rotationally displaced in response to the rotational displacement of the brake pedal 40.
The output connection terminal 69 of the potentiometer 60 is configured so that a potential corresponding to the rotational position of the brake pedal 40 appears.

Therefore, the rotational position of the brake pedal 40 can be detected based on the output potential of the potentiometer 60,
Detecting the stroke of the brake pedal 40 based on the amount of change in the output potential of the potentiometer 60 from the initial value, and the rotational speed of the brake pedal 40 based on the amount of change in the output potential of the potentiometer 60 over time. You can

6 to 8 show a second embodiment in which the potentiometer is arranged coaxially with the central axis of rotation of the brake pedal. FIG. 6 is a view corresponding to FIG. 2 of the first embodiment, and the outer peripheral shape of one end portion of the bearing portion 41 of the brake pedal 40 is formed in a shape having a plane portion in part, and a hole having the same shape as Is formed at the center of the rotor 63 of the potentiometer 60, and the rotor 63 is fitted to one end of the bearing portion 41 of the brake pedal 40.
It rotates integrally with. The other configurations are substantially the same as those of the embodiment, and the constituent elements corresponding to the constituent elements of the first embodiment are denoted by the same reference numerals. The configuration and the operation description of the second embodiment will be omitted because they can be easily understood from the description of the configuration and the operation of the first embodiment.

9 to 12 show Embodiment 3 in which the potentiometer is arranged so that the center of rotation of its rotor is concentric with the center of rotation of the brake pedal. FIG. 9 is a view corresponding to FIG. 2 of the first embodiment, and the potentiometer 60
The rotor 63 of the projection 6 slidably penetrates an arc-shaped long hole 61c provided in the case portion 61b and projects to the outside of the case.
3b. The long hole 61c has a center concentric with the rotation center of the brake pedal 40. A protrusion insertion member 42 into which the protrusion 63b is inserted is fixed to the brake pedal 40. The protrusion insertion member 42 is formed of a wear resistant material and has a pair of contact portions 42a and 42b that slidably contact the outer periphery of the protrusion 63b. Abutting portion 42a,
42b are arranged so as to face each other, and extend in the radial direction of the central axis of rotation of the brake pedal 40 with a space slightly larger than the outer diameter of the protrusion 63b therebetween. Therefore, the rotational displacement of the brake pedal 40 is regarded as the rotational displacement of the rotor 63 of the potentiometer 60.
0 is transmitted to the rotor 63, but the brake pedal 40
Even if the brake pedal 40 is displaced in the axial direction and the radial direction due to the axial play and the radial play of the brake pedal rotation center shaft existing in the rotation support portion of the
3b and the projection insertion member 42 are absorbed by the engagement mode and are not transmitted to the rotor 63, so that the rotational displacement of the brake pedal 40 can be detected with high accuracy. Case part 6
A cover 61d, which is made of a flexible plate and has a cut corresponding to the long hole 61c, is fixed to the outside of 1b to prevent dust from entering. The same code | symbol is attached | subjected to the component corresponding to the component of Embodiment 1. FIG. The structure and operation of the third embodiment will be omitted because they can be easily understood from the structure and operation of the first embodiment.

[0020]

The displacement detecting device for a vehicle brake pedal according to the invention of the present application interlocks with the rotation of the vehicle brake pedal in a bracket in which the vehicle brake pedal is rotatably assembled and fixed to the vehicle body. A displacement detector that outputs an electric signal corresponding to the turning position of the vehicle brake pedal is installed. Since the displacement detector is mounted in the bracket, the brake booster is either a negative pressure type or a hydraulic type. However, the space in the bracket, which has not been used in the past, is used as the installation space for the displacement detector, so that it can be easily spread.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of the invention of this application.

FIG. 2 is a layer cross-sectional view taken along line 2-2 in FIG.

FIG. 3 is a vertical cross-sectional view of the potentiometer in FIGS. 1 and 2.

FIG. 4 is a partially removed side view of the potentiometer of FIG.

5 is a side view of the rotor in FIG.

FIG. 6 is a diagram corresponding to FIG. 2 of the second embodiment of the invention of this application.

FIG. 7 is a partially removed side view of the potentiometer of FIG.

FIG. 8 is a side view of the rotor in FIG.

FIG. 9 is a diagram corresponding to FIG. 2 of the third embodiment of the invention of this application.

FIG. 10 is a partially removed side view of the potentiometer of FIG.

FIG. 11 is a side view of the rotor shown in FIG.

12 is a view of the protrusion insertion member fixed to the brake pedal in FIG. 9 as seen from below in FIG.

[Explanation of symbols]

 30 ... Bracket 40 ... Brake pedal 60 ... Potentiometer 63 ... Potentiometer rotor 63b ... Rotor protrusion 42 ... Protrusion insertion member

Claims (4)

[Claims] Claim: What is claimed is: 1. A vehicle brake pedal is rotatably attached to a bracket fixed to a vehicle body, and an electric signal corresponding to a rotational position of the vehicle brake pedal is interlocked with the vehicle brake pedal. A displacement detecting device for a vehicle brake pedal, characterized in that a displacement detector for outputting is attached. 2. The vehicle brake pedal displacement detection device according to claim 1, wherein the displacement detector has a rotation center offset from a rotation center of the brake pedal, and is interlocked with rotation of the brake pedal. A displacement detecting device for a vehicle brake pedal, which is a potentiometer provided with a rotor that rotates in a rotating manner. 3. The displacement detection device for a vehicle brake pedal according to claim 1, wherein the displacement detector has a rotation center concentric with a rotation center of the brake pedal and is interlocked with rotation of the brake pedal. A displacement detecting device for a vehicle brake pedal, which is a potentiometer provided with a rotor that rotates in a rotating manner. 4. The vehicle brake pedal displacement detection device according to claim 1, wherein the displacement detector has a rotation center concentric with a rotation center of the brake pedal and is interlocked with rotation of the brake pedal. A rotor that rotates in a rotating manner, and the rotor has a protrusion that is inserted into a protrusion insertion portion formed in the brake pedal, and the protrusion insertion portion and the protrusion are in the brake pedal rotation direction. In the vehicle, the relative displacement between the protrusion and the brake pedal is not allowed, and the relative displacement between the protrusion and the brake pedal is allowed in the axial direction and the radial direction of the brake pedal rotation center shaft. Brake pedal displacement detection device.