JPH0116653Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch pedal depression force reduction device, and more particularly to a clutch pedal depression force reduction device that can be easily assembled to a vehicle body.

Conventionally, as an example of this type of clutch pedal depression force reduction device, there is a device as shown in Figs. There is. This pedal force reduction device 10 is configured such that a bolt 5 and a nut 6, or a bolt 7 and a nut 8 are attached to a vehicle body panel 1 under the interposition of a collar 4.
A clutch operating member consisting of a bracket 2 attached to the clutch lever 2, and a clutch lever 3, which is suspended and supported by the bracket 2 so as to be rotatable between a return position A and a maximum depression position B, and has a pedal at its lower end. In this application, a sub-bracket 18 is suspended from the bracket 2 by a shaft 9 and fastened and fixed by a bolt 19, and a pin shaft 12 is fixed to the sub-bracket 18 by a washer 27. A lever 13 is rotatably mounted, and a pair of upper and lower spring receivers 14, 15 and a compression spring 16 interposed between the spring receivers 14, 15 are mounted on the lever 13, while an engagement pin is attached to the clutch lever 3. 11 is fixed, the upper spring receiver 14 is brought into contact with the pin shaft 12, the lower spring receiver 15 is brought into contact with the engagement pin 11, and the compression spring 16 is supported in the vertical direction.

A collar 25 (see FIG. 4) is provided at the attachment portion of the clutch lever 3 to the bracket 2 to facilitate rotational movement between the clutch lever 3 and the shaft 9. Further, a pedal force transmission rod 29 is secured to a pin 30 at a portion of the clutch lever 3 slightly below the shaft 9, and is connected to a clutch mechanism (not shown). The clutch lever 3 is constantly receiving a reaction force in the return direction via the pedal force transmission rod 29 due to the action of the clutch mechanism.

On the other hand, the lever 13 of the pedal force reduction device 10 is
As is clear from the figures and FIG. 3, it is made of an elongated plate, and a collar 21 is provided at the upper end of the plate at the attachment point to the sub-bracket 18, and a bush 20 having a through hole is attached to this collar 21. is,
A lever 13 is rotatably attached to the pin shaft 12 via the collar 21 and bush 20. The upper and lower spring receivers 14 and 15 have a cap structure, and a lever 13 is provided on the bottom of each.
Notch holes 23 and 24 are formed for insertion. Then, insert the lever 13 into the notch hole 23 with the cap recess of the upper spring receiver 14 facing downward, then pass the compression spring 16 through the lever 13, and then insert the lever 13 into the notch hole 24 with the cap recess of the lower spring receiver 15 facing upward. By inserting the lever 13, the spring device is attached to the lever 13. Further, a long hole 26 extending in the longitudinal direction is formed at the lower end of the lever 13, and the engagement pin 11 is inserted into the long hole 26, and the collar 22 is inserted into the long hole 26.
The clutch lever 3 is fixed to the lever 13 by the washer 28 under the intervention of the clutch lever 3, and the clutch lever 3 and the pedal force reduction device 10 are operatively connected. Engagement pin 11 to this lever 13
When the compression coil spring 16 is installed, the compression coil spring 16 is set to be compressed by a predetermined length from its free length between the pin shaft 12 and the engagement pin 11,
By constantly urging the engagement pin 11 downward, an acting force is exerted on the clutch pedal 3a. Further, when the clutch lever 3 is in the return position A, the rotation center of the lever 13 (corresponds to the axis of the pin shaft 12, which is referred to as P) is the rotation center of the clutch lever 3 (corresponds to the axis of the shaft 9). corresponds to the center of the engagement pin 11 (this corresponds to the center of
Clutch lever 3
It is set so that it is located at a slightly eccentric position in the direction of depression. Then, the operator presses the clutch pedal 3a.
When you step on the clutch lever 3, the engagement pin 11
It moves from the reference position Q ₁ corresponding to the return position A, through the reversal position Q ₂ , to the maximum stroke position Q ₃ corresponding to the maximum depression position B while sliding in the elongated hole 26. Then, at the maximum stroke position _Q3 , the engagement pin 11 hits the lower end of the elongated hole 26 and becomes a stopper. During this clutch operation, the compression spring 16 is further compressed by the engagement pin 11 that moves from the reference position _Q1 to the reversed position _Q2 , and after being compressed to the maximum at the reversed position _Q2 , the compression spring 16 is compressed to the reverse position. After passing through Q ₂ , the compression spring 16 expands due to its own return action. Further, the compression spring 16 is compressed against the clutch lever 3 while the engagement pin 11 moves from the reference position Q ₁ to the reverse position Q ₂ .
On the other hand, after passing the reversal position _Q2 , it acts in a direction that promotes the operation of the clutch lever 3, counteracting the reaction force from the clutch mechanism and reducing the pressing force on the clutch pedal 3a. let

However, in such a conventional pedal force reduction device, when the clutch pedal 3a reaches the maximum depression position, the elongated hole 26 is located inside the lever 13 because the lever 13 and the engagement pin 11 function as a stopper. Since it is formed into a closed shape (that is, a hollow structure), when attaching the clutch lever 3 and the pedal force reduction device 10 to the brackets 2 and 18,
There was a problem with poor assembly workability. That is,
To attach the clutch pedal 3a and the pedal force reduction device 10 to the bracket 2, first assemble the clutch lever 3 to the bracket 2 in a suspended manner, and then attach the lever 1 to the bracket 2.
After assembling the spring receivers 14, 15 and the compression spring 16 to the clutch lever 3, the lever 13 is assembled together with the collar 22 to the engaging pin 11 fixed to the clutch lever 3, and then the lever 13 is attached to the sub-bracket 18 by the pin shaft 12. Install. However,
In the final assembly step, the operator must compress and install the compression spring 16, which has an extremely large elastic modulus, resulting in poor assembly workability.
The number of man-hours also increases.

The present invention was developed by focusing on these conventional problems, and its purpose is to improve assembly workability and reduce assembly man-hours in the work of attaching the clutch pedal to the vehicle body. It is an object of the present invention to provide a clutch pedal depression force reduction device that can reduce the pressing force of a clutch pedal.

The gist of the present invention is to form a slit groove that opens toward the tip in the lever constituting the pedal force reduction device, and to operatively connect the lever and the engagement pin via this slit groove to reduce the pedal force on the clutch pedal. In addition, a stopper against which the clutch lever comes into contact is attached to a part of the vehicle body, such as a bracket, so that the clutch lever will come into contact with it when the clutch pedal is depressed to its maximum depression position. According to this configuration, when the clutch pedal is depressed, the engagement pin slides along the slit groove from the base to the tip, so that the length of the lever can be adjusted so that the engagement pin almost reaches the slit groove when the clutch pedal is depressed to the maximum. If the dimensions are set so that the clutch pedal is at the most extreme position (i.e., the open end), the clutch pedal can be pushed further than the maximum depressed position (hereinafter referred to as the over-depressed position) with the stopper removed. Once moved, the engagement pin will be completely removed from the slit groove. Therefore, if this is applied at the time of assembly, the clutch lever and pedal effort reducing device can be easily assembled.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 and FIG. 5 are diagrams showing an embodiment of the present invention. A clutch pedal depression force reduction device 10 according to this embodiment has a lever 13a rotatably attached to brackets 2 and 18 attached to a vehicle body panel 1 via a pin shaft 12.
, a pair of upper and lower spring receivers 1 facing each other
4, 15 and a compression spring 16 interposed between the spring receivers 14, 15, and the engagement pin 11 is fixed to the clutch lever 3, and the upper spring receiver 14 is attached to the pin shaft 12.
The lower spring receiver 15 is brought into contact with the engagement pin 1.
1, it basically has the same configuration as a conventional pedal force reduction device. However, unlike in the past, the tip of the lever 13a is
A slit groove 17 is formed which extends in the longitudinal direction of the lever 3a and opens at the tip of the lever 13a. The length of the lever 13a is set such that the engagement pin 11 comes to approximately the most extreme end of the slit groove 17 when the clutch pedal is depressed to the maximum. On the other hand, a stopper 32 is provided near the front end of the bracket 2 at a portion corresponding to the clutch lever 3, and when the clutch pedal 3a moves to the maximum depression position B, the clutch lever 3 moves to the stopper 3.
I'm trying to hit number 2. The stopper 32 consists of a stopper support member 33 fixed to the bracket 2 by means such as welding, and a bolt member 34 which is tightened with a nut to the stopper support member 33 and has a contact plate 36 at its tip. By adjusting the screws on the clutch pedal 3
The movement stroke of a, that is, the maximum depression position B can be adjusted. Note that the other components, such as the attachment of the spring receivers 14, 15, the compression spring 16, the clutch pedal 3a, etc., are the same as in the above-mentioned conventional example.

Since it has such a configuration, the clutch pedal 3a
When assembling the pedal force reduction device 10, first, the clutch lever 3 is suspended and assembled to the bracket 2, and the lever 13 is attached to the sub-bracket 18.
a with the pin shaft 12, then load the spring receivers 14, 15 and the compression spring 16 onto the lever 13a, and move the lever 13a forward,
That is, the clutch pedal 3a is rotated in the depressing direction, and the clutch pedal 3a is also rotated in the depressing direction. And the clutch pedal 3a is at the maximum depression position B
While rotating the lever to the excessively depressed position C,
Correspondingly, when the lever 13a is also rotated past the maximum stroke position Q3, the position of the engagement pin 11 attached to the clutch lever ₃ changes to the position of the lever 13a, as shown by the dashed line in FIG. It almost coincides with the open end of the slit groove 17. Therefore, at this position, align the engagement pin 11 and the slit groove 17 without letting the spring receivers 14, 15 and the compression spring 16 come off, and rotate the clutch pedal 3a toward the return position A. , even if the elastic modulus of the compression spring 16 is large, the clutch pedal 3a acts as a lever for the compression spring 16.
The engaging pin 11 enters into the slit groove 17 while compressing it. Therefore, according to this assembly work,
There is no need for the operator to compress the compression spring 16, and the pedaling force reducing device 10 can be assembled very easily. After the above-mentioned assembly is completed, the bolt 34 of the stopper 32 is projected, and the contact plate 36 is set at a position corresponding to the maximum depression position B of the clutch pedal. And after this, the clutch pedal 32
No matter how much you press a, the clutch pedal 3a
is regulated by the action of the stopper 32 when it moves to the maximum depression position B, so the engagement pin 11
will not come off from the slit groove 17.

In this embodiment, the compression spring 16 is supported at the attachment portion of the lever 13a to the sub-bracket 18 by the upper spring receiver 14 being in line contact with the pin shaft 22. However, with such spring support, there is a high possibility that the upper spring receiver 14 will tilt, and there is a fear that the compression spring 16 will tilt and hit the lever 13, causing abnormal noise. FIGS. 6 and 7 are diagrams showing a second embodiment of the present invention, which has been made with attention to this point. In this example, lever 1
3b, engagement portions 31 having a notched structure are formed to protrude from both side edges of the portion where the upper spring receiver 14 is disposed. The engaging portion 31 is provided at approximately the same height as the lower edge of the collar 21 of the lever 13b mounting portion, and is stepped wider than this portion by several millimeters than the width of the portion on the tip side of the lever 13b. It is becoming.

Therefore, according to this embodiment, the compression spring 16 is supported in the upper spring receiver 14 portion by the pin shaft 12 in line contact with the pin shaft 12 in the longitudinal direction, and also by the engagement portion provided on the lever 13b. 31 in a direction substantially perpendicular to the longitudinal direction of the pin shaft 12.
Therefore, in this embodiment, the compression spring 16 is supported crosswise and stable support is obtained, so that while the clutch pedal 3a moves from the return position A to the maximum depression position B by the operator's depression, the compression spring Even if the spring 16 reverses its action midway, it can be supported reliably. This prevents the compression spring 16 from bending and colliding with the lever 13b or other parts, thereby suppressing the occurrence of abnormal noise.

In this second embodiment, the engaging part 31 is formed by notches on both side edges of the lever 13b so that the upper part of the engaging part 31 is wider than the lower part, but this is not necessarily the case. For example, the levers 13a, 13b as shown in the previous example may be welded or otherwise provided with engaging pieces that protrude further laterally from the side edges of the levers 13a, 13b at predetermined locations. It may be fixed by other means. however,
In this case, an extra step is required to attach the engaging piece to the side edge of the lever, so it is preferable to use the method shown in the second embodiment above in which the engaging part is formed at once by press working or the like. is advantageous in terms of cost.

As explained above, according to the present invention, a slit groove that is open at the tip is formed in the lever of the pedal force reduction device, and the clutch pedal and the pedal force reduction device are actuated by the slit groove and the engagement pin attached to the clutch pedal. While connected, a stopper is provided on the vehicle body side to regulate the amount of depression of the clutch pedal, making it extremely easy to assemble the pedal force reduction device to the vehicle body, improving assembly work efficiency. Various effects can be obtained, such as reducing the number of man-hours required for assembly.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional example of a clutch pedal mounting structure and a pedal force reduction device used therein;
Figure 2 is a right sectional view of the conventional pedal force reduction device mentioned above;
Figure 3 is a partially sectional front view of a conventional pedal force reduction device.
FIG. 4 is an exploded perspective view showing a pedal effort reduction device according to an embodiment of the present invention and a clutch pedal equipped with the same, FIG. 5 is an operational diagram of a clutch pedal equipped with the pedal effort reduction device of the present invention, and FIG. 6 7 is a perspective view of a main part of a pedal force reducing device according to a second embodiment of the present invention, and FIG. 7 is a partially sectional front view of the pedal force reducing device according to the second embodiment. 1...Vehicle body panel, 2,18...Bracket, 3...
Clutch lever, 3a...clutch pedal, 9...shaft, 10...treading force reduction device, 11...engaging pin,
12... Pin shaft, 13, 13a, 13b... Lever, 14, 15... Spring receiver, 16... Compression spring, 17... Slit groove, 26... Long hole, 31
...(spring receiver) engaging portion, 32...stopper.

Claims (1)

[Scope of Claim for Utility Model Registration] A lever is rotatably attached to a bracket attached to a vehicle body panel via a pin shaft, and a pair of spring holders facing each other in the longitudinal direction of the lever are interposed between the spring holders. At the same time, an engagement pin is fixed to the clutch lever, the upper spring receiver is brought into contact with the pin shaft, and the lower spring receiver is brought into contact with the engagement pin to support the compression spring. In this clutch pedal depression force reduction device, the lever is formed with a slit groove that is open toward the tip of the lever, and the lever and the engagement pin are operatively connected through the slit groove, while the clutch pedal is A clutch pedal characterized in that a stopper is attached to which the lever abuts, and when the clutch pedal is depressed to the maximum depression position, the clutch lever abuts against the stopper, thereby regulating the amount of sliding of the engagement pin within the slit groove. Pedal force reduction device.