JPH03262731A - Depression force reducing device for clutch pedal - Google Patents

Abstract

PURPOSE:To reduce the initial depression force and increase the maximum depression force reducing force by hooking one end of at least one of multiple tensile springs for a clutch pedal on the spring hook section of a car body at the position displaced from a specific connecting straight line. CONSTITUTION:A depression force reducing device 1 is tiltably supported via a rotary shaft 4 at the upper end section of a clutch pedal 3 in a clutch support 2. The first tensile spring 10 is hooked on the first spring hook section 9 at one end and on a support shaft 8 at the other end respectively as in the past. The second tensile spring 13 is hooked on the first spring hook section 9 at one end and on the second spring hook section 14 hooked on the clutch support 2 on the other end respectively. The second spring hook section 14 is arranged at the position displaced from a straight line L connecting the support shaft 8 and the first spring hook section 9. The initial depression force is reduced, and the maximum depression force reducing force is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] This invention relates to a clutch pedal depression force reduction device for an automobile.

[Prior Art] A conventional clutch pedal depression force reduction device has a structure shown in FIGS. 8 to 10. That is, in the conventional clutch pedal depression force reduction device (hereinafter simply referred to as the depression force reduction device) 31, the upper end of the clutch pedal 3 is tiltably supported in a groove-shaped clutch support 2 attached to the vehicle body via a rotation shaft 4. The base of a short plate-shaped lever 5 is fixed to the clutch pedal 3 with the rotating shaft 4 as the central axis, and one end of a long plate-shaped link 6 is attached to the rotating shaft 4 at the end of the lever 5. parallel pin 12
are linked via. A slide hole 7 is formed in the link 6 in its longitudinal direction.
A support shaft 8 parallel to the rotation shaft 4 and having both ends fixed to the clutch support 2 is loosely inserted into the clutch support 2 . Therefore, the link 6 can slide and rotate relative to the support shaft 8 via the slide hole 7 as the clutch pedal 3 is tilted. A first spring locking portion 9 is provided at the other end of the link 6 so as to protrude from both sides of the link 6.
] O and the second tension spring 1
1 is locked at one end. The other ends of both tension springs 10.11 are both fixed to the support shaft 8.

[Problem to be solved by the invention] In these three conventional pedal force reduction devices, the clutch pedal 3
When the clutch pedal is depressed from the original position, the clutch pedal is initially biased toward the original position as shown by the dotted curve (D) in FIG. 7, which shows the relationship between the stroke of the clutch pedal 3 and the depression force. A force acts on the pedal, but after the pedal stroke passes a predetermined point M (turnover point), a force biasing the pedal in the direction of depression (treading force reduction force) is generated.

In this case, there are legal issues.

(B) As shown in Fig. 7, the initial pedal force and pedal force reduction force are proportional to the pedal stroke after turnover, so if the initial pedal force is reduced, the maximum pedal force reduction force also becomes smaller, and the maximum pedal force reduction force is increased. Then, the initial pedal force also increases, so it is not possible to increase the maximum pedal force reduction force by reducing the initial pedal force.

(Tension springs 10 and 11 always apply force to the link 6 in one direction (longitudinal direction of the link 6), and since the rotation angle of the link 6 and the stroke of the clutch pedal 3 are proportional, the maximum pedal force reduction point It is not possible to obtain a large maximum pedal force reduction force.

An object of the present invention is to provide a clutch pedal depression force reduction device that maintains the turnover point and the maximum depression force reduction point the same as conventional depression force reduction devices, and has a small initial depression force and a large maximum depression force reduction force. Incidentally, there is Japanese Utility Model Application Publication No. 63-84622 as a prior art document related to the present application.

[Technical Means for Solving the Problems] In order to solve the above problems, the present invention provides that a part of the clutch pedal is tiltably supported on a part of the vehicle body via a rotation shaft, and the clutch pedal is tilted in the longitudinal direction. The link engages with one end of the link having a slide hole, and the link is slidably and rotatably supported via the slide hole on a support shaft parallel to the rotation axis and fixed to a part of the vehicle body. In the clutch pedal depression force reduction device, a first spring locking portion is provided at the other end of the link, and one ends of a plurality of tension springs are locked to the first spring locking portion. The other end of at least one of the plurality of tension springs is connected to a spring locking portion provided in a part of the vehicle body at a position deviating from the straight line connecting the support shaft and the first spring locking portion. It has a locked configuration.

[Function] The other end of at least one of the plurality of tension springs is located at a position deviating from the straight line connecting the support shaft and the first spring locking portion to a spring locking portion provided on a part of the vehicle body. By adjusting the tension of the plurality of tension springs and selecting the position of the spring locking part, when the clutch pedal is depressed from its original position, the turnover point and the maximum depression force can be reduced. It is possible to reduce the initial pedal force and increase the maximum pedal force reduction force while maintaining the same points as the conventional pedal force reduction device.

[Examples] The present invention will be described below with reference to drawings showing examples. 1st
Figures 1 to 3 show the first embodiment. In the first embodiment, the same components as in FIGS. 8 to 10 are denoted by the same reference numerals.
I will omit that explanation. In the pedaling force reducing device of the first embodiment], the first tension spring 10 is engaged with the first spring locking portion 9 at one end and the support shaft 8 at the other end, as in the case of the conventional pedaling force reducing device 31. The second tension spring 13 of the first embodiment, which corresponds to the second tension spring 11 of the conventional pedal force reduction device 31, has one end connected to the first spring locking portion 9 and the other end connected to the clutch. It is locked to a second spring locking part 14 fixed to the support 2. This second locking portion 14 is set at a position away from the straight line connecting the support shaft 8 and the first spring locking portion 9.

With the above configuration, the tension of the first tension spring 10 and the second tension spring 13 can be adjusted, and the second spring locking part 14 can be adjusted.
By adjusting the position of the tension spring 10 shown in FIG. When combined, the curve (C) in the figure is obtained.In the curve (C), the turnover point T and the maximum pedal force reduction point are set at the same positions as those of the conventional pedal force reduction device 31.

Therefore, according to the first embodiment, it is possible to reduce the initial pedal force and increase the maximum pedal force reduction force, and the setting range of the pedal force reduction force is much wider than before, so that the optimum pedal force can be obtained.

Generally, in a vehicle, the pedal force is determined by the clutch operation force, but in order to obtain the optimal pedal force, when a pedal force reduction device is set on the pedal, the initial pedal force value, maximum pedal force reduction value, It is necessary to set the turnover point and the maximum pedal effort reduction point to optimal values. In conventional pedal force reduction devices, once three of the four values for determining the pedal force reduction characteristics are determined, the remaining one value is automatically determined, and that value is used to obtain the optimal pedal force. may not be the value.

However, according to this embodiment, the four values can be set independently and freely, so that the optimum pedal depression force can always be obtained.

4 to 6 show a pedal force reducing device 21 of a second embodiment. In the second embodiment, the same components as in the first embodiment are given the same reference numerals, and their explanations will be omitted. In the same figure, the second tension spring 13 is locked to the first spring locking part 9 and the second spring locking part 14 as in the first embodiment, but the first tension spring 15 has one end. In the first spring locking part 9,
The other end is locked to a third spring locking portion 16 fixed to the clutch support 2. This third spring locking portion 16 is set at a position away from the straight line connecting the support shaft 8 and the first spring locking portion 9.

With the above configuration, the tension of the first tension spring 15 and the second tension spring 13 can be adjusted, and the second spring locking part 14 can be adjusted.
By adjusting the position of the third spring locking portion 16, the overall spring characteristic, which combines the characteristics of the first tension spring 15 and the characteristics of the second tension spring 13, is expressed by the curve shown in FIG. c) It can be set as follows.

All of the above descriptions relate to embodiments of the present invention, and any modifications to the above embodiments fall within the technical scope of the present invention.

[Effects] Since the present invention has the above configuration, it has the following excellent effects.

(B) It is possible to reduce the initial pedal effort and increase the maximum pedal effort reduction force, and the setting range of the pedal effort reduction force is much wider than before, making it possible to obtain the optimum pedal effort.

(mouth) When the main pedal force reduction device is set on the pedal, the initial pedal force value, maximum pedal force reduction value, turnover point, and maximum pedal force reduction point can be independently set, so the pedal is always optimal. You can gain pedaling power.

[Brief explanation of drawings]

FIG. 1 is a left side view of the M1 embodiment, FIG. 2 is a front view, and FIG. 3 is a right side view. FIG. 4 shows a left side view of the second embodiment, FIG. 5 shows a front view, and FIG. 6 shows a right side view. FIG. 7 is a characteristic diagram showing the relationship between the stroke of the clutch pedal and the depression force reduction force, and shows a comparison between the present invention and a conventional device. Figure 8 is a left side view of a conventional clutch pedal depression force reduction device, Figure 9 is a front view, and
Figure 0 also shows a right side view. 2... Clutch support (part of the vehicle body) 3... Clutch pedal 4... Rotating shaft 5... Lever 6... Link

Claims (1)

[Claims] A part of the clutch pedal is tiltably supported on a part of the vehicle body via a rotation shaft, and the clutch pedal is linked and engaged with one end of a link having a longitudinal slide hole, and the link engages with one end of a link having a longitudinal slide hole. The link is slidably and rotatably supported by a support shaft parallel to the rotation axis and fixed to a part of the vehicle body, and a first spring locking portion is provided at the other end of the link. A clutch pedal depression force reducing device in which one end of a plurality of tension springs is locked to a spring locking portion of the clutch pedal, wherein the other end of at least one of the plurality of tension springs is connected to the support shaft. A clutch pedal depression force reducing device, characterized in that the device is engaged with a spring engagement portion provided on a part of a vehicle body at a position away from a straight line connecting the first spring engagement portion.