JPS6325219Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of an operating force reduction device for an operating lever.

[Prior art and its problems] In general, as the operating lever, such as the clutch pedal of a car, is depressed to its full stroke, the reaction force applied to the foot increases (up to about 10 kg). When you step on the , your legs get tired, and especially on roads with heavy traffic congestion, such as in a big city, you need to change gears more often, which can cause a lot of leg fatigue.

In order to solve these problems, a device for reducing the operating force of the operating lever, that is, the clutch pedal, has been proposed and has been adopted in some vehicles, but this type of device uses a link mechanism etc. Therefore, there is an economical drawback that the number of parts is large and the cost is high, and there are problems in integration due to restrictions on installation space.

[Means to solve the problem]

The present invention was developed in response to these circumstances, and has a simple structure that reduces the operating force, solves the problems of the conventional technology, and is inexpensive and free from the constraints of installation space. The structure of the present invention which solves the problems of the prior art is to provide an operating lever which is pivotally supported on the main body, and a leg which normally faces downwards when the operating lever is stroked. At this point, a swinging top whose upwardly facing leg comes into contact with the end face of the operating lever to restrict vertical rotation is pivoted, and one end of a torsion coil spring is connected to the swinging end of the swinging top at point b. , the other end of this torsion coil spring is connected to the main body on the rotating surface of the operating lever at a point c, and this connecting point c is connected to the pivot point a and the connecting point b in the normal state of the operating lever. and a line ab' connecting the pivot point a and the connection point b' when the operating lever is fully stroked.

〔Example〕

The embodiments of the present invention will be explained with reference to the drawings: 1
1 is a main body bracket attached to the vehicle body 2. The upper part of a clutch pedal 3 is pivotally supported on the main body bracket 1, and when the clutch pedal 3 is depressed and released, the clutch is engaged and engaged via a cable 4. , gear shifting operations can be performed. 5 is a stopper for adjusting the clutch pedal 3 to the set position.

In such a clutch pedal mechanism, an arm 6 is integrally or separately protruded in front of the clutch pedal 3 in the vicinity of the pivot point a, and the distal end of the arm 6 is brought into contact with the end surface of the clutch pedal 3. One side of the swinging top 7, which has a triangular front shape with upward and downward facing legs 7a and 7b, is pivotally supported. One end of the torsion coil spring 8 is connected to the swinging end of the swinging top 7, that is, the remaining legs other than the legs 7a and 7b, and the other end of the torsion coil spring is connected to the other end of the torsion coil spring 8. Connect to main body bracket 1 at point c.

The torsion coil spring 8 must be installed so that it is parallel to the rotating surface of the clutch pedal 3, more specifically, to the longitudinal direction of the vehicle body 2, and the main body of the torsion coil spring 8 is The connection point c to the bracket 1 is connected to the ab line connecting the shaft fulcrum point a of the clutch pedal 3 in its normal state and the connection point b, and the shaft fulcrum point a and the connection point b' when the clutch pedal 3 is at full stroke. The condition of the present invention is that it be set within the range surrounded by the line ab' connecting the points.

Further, regarding the specifications of the torsion coil spring 8, it is desirable to reduce the spring constant, and as a means of achieving this, the inner diameter of the coil is increased and the number of turns is increased. And, in order to increase durability and strength, the wire diameter is increased. Furthermore, the arm 6 can reduce the elasticity of the torsion coil spring 8 by making a reasonably large distance between the pivot point a and the connection point b and increasing the amount of movement between the connection points b and b'. It is designed to be larger and to be used to reduce operating force.

[Explanation of action]

Next, the operation will be explained. When the clutch pedal 3 is set in the state shown in FIGS. 1 and 2a, the elastic force of the torsion coil spring 8 acts in the direction shown by the arrow. Then, when the clutch pedal 3 is depressed as shown in Fig. 2b, the shaft fulcrum a
When the points B, B, and C are lined up in a straight line, the elasticity of the torsion coil spring 8 becomes a neutral state in which it does not act on the clutch pedal 3 at all, and as the clutch pedal 3 is further depressed, its During the depressing process, the connecting point b crosses the ac line and reaches the connecting point b' at the full stroke.

When the connection point b crosses the ac line in this way, the swinging top 7 swings rapidly due to the action of the torsion coil spring 8, which moves the connection point b to a position away from the ac line. , acts in conjunction with the depressing action of the clutch pedal 3, and the torsion coil spring 8
The elasticity acts in the direction of the arrow in FIG. 2c, and reduces the pressing force of the clutch pedal 3 by that amount. Then, when you release the clutch pedal 3,
When the connection point b' passes through the ac line, swing frame 7
The oscillating action of 1 and 2 act together, and the elasticity of the torsion coil spring 8 acts as shown by the arrows in FIGS. 1 and 2 a, so that the clutch pedal 3 quickly returns to the set position.

[Effect of idea]

As described above, according to the configuration of the present invention, the following effects can be obtained.

(a) Point a, the pivot point of the operating lever, and connecting point b of the swinging piece of the torsion coil spring to the operating lever.
In the relationship between the connection point c of the torsion coil spring to the main body, the connection point b with respect to the shaft fulcrum point a
Since the connection point c is located within the rotation range of the point, that is, the area surrounded by the ab line and the ab' line, the connection point b passes through the ac line when the operating lever is rotated. From this point on, the elasticity of the torsion coil spring acts in the operating direction of the operating lever, reducing the operating force.In addition, due to the swinging movement of the swinging top, the connection point B moves from the AC line more quickly.
As a result of moving farther, the elasticity of the torsion coil spring acts faster and more strongly, increasing the reduction in operating force.

(b) Furthermore, since a swinging top is provided, the distance between the pivot point a and the connection point b is increased, and the connection point b
The amount of movement between points .about.b' can be increased, and therefore the elasticity of the torsion coil spring can be used to a greater extent to reduce the operating force of the operating lever, thereby doubling the operating force.

(c) Furthermore, compared to conventional operating force reduction devices, the structure is extremely simple, the purpose can be achieved with one torsion coil spring and one swinging piece, and the economic effect is also great.

[Brief explanation of drawings]

FIG. 1 is a side view, and FIGS. 2a, b, and c are operation explanatory diagrams. 1... Body bracket, 2... Vehicle body, 3... Clutch pedal, 4... Cable, 5... Stopper, 6... Arm, 7... Swing piece, 7a, 7
b...Leg, 8...Torsion coil spring, point a...
Axial fulcrum, point b, point b', point c...connection point.

Claims (1)

[Utility Model Claims] (1) A pivoting top is pivoted to an operating lever pivoted at a on a main body, and its downward leg in the normal state of the operating lever and its upward leg in the stroke of the operating lever come into contact with the end face of the operating lever to restrict its vertical rotation. One end of a torsion coil spring is connected at b to the pivot end of the pivoting top, and the other end of the torsion coil spring is connected at c to the main body on the rotating surface of the operating lever.
This connecting point c is connected to the pivot point a and the connecting point b in the normal state of the operating lever.
A device for reducing the operating force of an operating lever, characterized in that the operating force is set within a range surrounded by line ab and line ab' connecting point a and connecting point b' at the time of full stroke of the operating lever. (2) A device for reducing the operating force of an operating lever as described in claim 1 of the utility model registration, in which the operating lever is a clutch pedal.