JPS6232112Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vibration-proof connection structure between the push rod portion of a clutch master cylinder and a clutch pedal used in vehicles such as automobiles.

[Conventional technology]

In automobiles, power from the engine is transmitted to the wheels,
A clutch master cylinder is used when a clutch device for shutting off is provided and hydraulic pressure is used as the operating mechanism for the clutch device. The push rod of the master cylinder and the clutch pedal are usually connected to each other by having a clevis fixed to the end of the push rod and further connecting the clevis to the clutch pedal with a pin.

In this type of clutch operation mechanism, engine vibration is caused by the clutch release system (clutch release fork → clutch release cylinder → hydraulic piping → clutch master cylinder → push rod).
to cause the clutch pedal to vibrate when the clutch pedal is released or engaged, or
This may cause an unpleasant buzzing sound inside the vehicle.

As one of the countermeasures, a rubber damper 7 has been conventionally installed in the push rod portion 2 of the clutch master cylinder 1 between the push rod 3 and the clevis 6 connected to the clutch pedal 4 and pin 5, as shown in FIG. The vibrations transmitted from the clutch master cylinder 1 to the clutch pedal 4 are blocked by providing a
(See Publication No. 16047).

[Problem that the invention attempts to solve]

However, the above-mentioned measure has the disadvantage that the entire length of the push rod portion 2 consisting of the push rod 3 and the clevis 6 becomes longer by the dimension in which the rubber damper 7 is provided. This is the clutch master cylinder 1 in the push rod part 2.
This is because a dimension l corresponding to the movement stroke of the piston must be set in the push rod 3, so an extra dimension corresponding to the rubber damper 7 is added, and the overall length must be increased.

Therefore, if the mounting flange 8 of the clutch master cylinder 1 is fixed to the dash panel 9 in a normal state, the mounting position of the clutch pedal 4 will be too far backward and protrude too far into the passenger compartment. Therefore, as shown by the imaginary line in FIG. 1, by interposing a bracket 10 between the mounting flange 8 and the dash panel 9, or by installing a new body of the clutch master cylinder 1 and changing the flange position, the clutch can be fixed. There was a problem that the master cylinder 1 had to be moved to the front of the engine room.

FIG. 2 is an enlarged sectional view taken along the line - in FIG. 1, showing the conventional connection structure between the clevis 6 of the push rod portion 2 and the clutch pedal 4 in relation to the present invention described later. In this connection structure, a clutch pedal 4 is inserted between a clevis 6 whose end is formed into a bifurcated shape, and a mounting hole 1 is formed in each of the clevis 6 and the clutch pedal 4.
The pin 5 is inserted into the pins 1 and 12, and is prevented from coming off by the clip 13, so that the pins 4 and 6 are connected to each other. In addition, the mounting fitting hole 1 of the clutch pedal 4
2 is provided with a bush 14, through which the clutch pedal 4 is connected with a pin. Further, a wave washer 17 is interposed between the clevis 6 on the right side in the figure and the head of the pin 5 to prevent play in this joint. In this manner, the conventional connection portion between the push rod portion 2 and the clutch pedal 4 has a so-called rigid connection structure to which vibrations are easily transmitted.

Therefore, the present invention has been devised to eliminate the above-mentioned drawbacks and inconveniences, and its purpose is to absorb vibration in two stages so that the clutch can be removed from the clutch master cylinder without increasing the size of the push rod. The objective is to effectively prevent vibrations from being transmitted to the pedals.

[Means for solving problems]

Therefore, the present invention employs the following configuration as a means for solving the above-mentioned problems.

That is, the present invention provides an anti-vibration connection structure between the push rod portion of the clutch master cylinder and the clutch pedal as described above, in which the side surface of the clevis and the side surface of the clutch pedal come into contact between the mounting hole formed in the clevis and the pin. a first elastic bushing having a flange portion for preventing
The clutch pedal is characterized by a so-called two-stage vibration absorption structure in which a second elastic bushing is interposed and attached between the mounting hole formed in the clutch pedal and the pin.

Specifically, using FIGS. 1, 3, and 4 as examples, the clutch master cylinder 1
The push rod 3 and the clutch pedal 4 are connected to each other by fixing a clevis 6 to the end of the push rod 3 and further connecting the clevis 6 to the clutch pedal 4 with a pin 5.

Mounting fitting hole 11 formed in clevis 6 and pin 5
A first elastic bushing 15 having a flange portion 15a that prevents the side surface of the clevis 6 from coming into contact with the side surface of the clutch pedal 4 is interposed between the clevis 6 and the clutch pedal 4.

Furthermore, a second elastic bushing 1 is provided between the mounting hole 12 formed in the clutch pedal 4 and the pin 5.
8 is interposed.

[Effect]

According to the above-described means, even if engine vibration is transmitted from the clutch master cylinder 1 via the push rod 3 to the clevis 6 connected to the clutch pedal 4, it is absorbed by the damper action of the first elastic bush 15 and transmitted to the pin 5. almost no vibration is transmitted.

Even if vibration were to be transmitted to the pin 5, it would be absorbed by the second elastic bushing 18 and transmission of the vibration to the clutch pedal 4 would be effectively prevented.

Furthermore, contact between the side surface of the clevis 6 and the side surface of the clutch pedal 4 is prevented by a flange portion 15a provided on the first elastic bushing. Therefore,
Vibration transmission due to contact between the side surface of the clevis 6 and the side surface of the clutch pedal 4 is also effectively prevented by the flange portion 15a.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

3 and 4 show a vibration-proof connection structure between the push rod part of the clutch master cylinder and the clutch pedal according to the first embodiment of the present invention, and FIG. 3 is a partially cutaway front view, and FIG. The figure is a sectional view taken along the - line in FIG. 3.

The basic structure of this first embodiment is the same as the connection structure between the clevis 6 of the push rod section 2 and the clutch pedal 4 shown in FIG. The same reference numerals as in FIG. 2 will be used for the same parts, and the explanation thereof will be omitted, and the different constituent parts will be explained.

However, in this embodiment, a cylindrical hole is formed in the annular space formed between the outer peripheral surface of the pin 5 and the mounting fitting hole 11 for fitting the pin 5 formed in the bifurcated clevis 6. A rubber bushing 15 is interposed as a first elastic bushing. Furthermore, a rubber bushing 18 as a second elastic bushing is interposed in the annular space formed between the mounting fitting hole 12 formed on the clutch pedal 4 for fitting the pin 5 and the outer peripheral surface of the pin 5. ing. In this way, the clevis 6 and the pin 5 are connected via the rubber bush 15 having a damper function, and the pin 5 and the clutch pedal 4 are further connected via the rubber bush 18 having a damper function, thereby providing a so-called two-stage vibration absorption structure. That is.

The rubber bush 15 also has flange portions 15 extending on both sides of the clevis 6 as shown in FIG.
a is formed. This flange portion 15a is
Direct contact between the side surface of the clevis 6 and the side surface of the clutch pedal 4 is prevented.

In addition, a pipe 1 is installed in the inner cylindrical part of the rubber bush 15.
6 is attached by press-fitting or baking adhesive, etc., to prevent the pin 5 and the rubber bushing 15 from coming into direct sliding contact and damaging the rubber bushing 15 early. However, this pipe 16 may be omitted depending on the hardness and installation width of the rubber bush 15. Furthermore, rubber bushing 18
A flange portion is provided on one side.

In the first embodiment having the above configuration, the clevis 6 of the bushing rod portion 2 and the clutch pedal 4 are connected, so that engine vibrations are transmitted from the clutch master cylinder 1 to the clevis 6 via the push rod 3. . but,
A rubber button 1 is installed in the mounting hole 11 of the clevis 6.
5 is interposed between the pin 5 and the rubber button 1.
5, the transmitted vibration is absorbed by the damper action of the rubber bush 15, and almost no vibration is transmitted to the pin 5.

Even if vibration were to be transmitted to the pin 5, since the pin 5 and the clutch pedal 4 are connected via the rubber bushing 18, the vibration transmitted to the pin 5 would be ensured by the damper action of the rubber bushing 18. The transmission of vibration to the clutch pedal 4 is effectively prevented.

In addition, in this embodiment, the rubber button 1
5 has a flange portion 15a extending on both sides of the clevis 6.
Since contact between the side surface of the clevis 6 and the side surface of the clutch pedal 4 is prevented, vibration transmission due to the side surface contact between the two 4 and 6 can also be prevented. As a result, vibration transmission from the clevis 6 of the push rod portion 2 to the clutch pedal 4 can be completely blocked.

Furthermore, when inserting the pin 5 in the final assembly stage of connecting the clevis 6 to the clutch pedal 4, if the pin 5 is inserted in an inclined or eccentric state, the pin 5 will cause the rubber bush 15 on the opposite side to may fall off. However, in this embodiment, the flange portion 15a provided on the rubber bush 15 reliably prevents the rubber bush 15 from falling off. Therefore, it is also possible to improve the ease of assembly.

5 and 6 show a vibration-proof connection structure between the push rod part of the clutch master cylinder and the clutch pedal according to the second embodiment of the present invention, FIG. 5 is a partially cutaway front view, and FIG. The figure is a sectional view taken along the - line in FIG. 5.

Note that in FIGS. 5 and 6, the parts corresponding to those in FIGS. 3 and 4 are designated by the same reference numerals as in FIGS. 3 and 4, and the explanation thereof will be omitted.

In this second embodiment, the connecting portion of the clevis 6 to the clutch pedal 4 is not bifurcated, but remains a single flat plate and is connected with pins. Also in this embodiment, a rubber bush 15 is interposed between the clevis 6 and the pin 5, and has a flange portion 15a that prevents the side surface of the clevis 6 from coming into contact with the side surface of the clutch pedal 4. A rubber bush 18 is interposed between the pin 5 and the clutch pedal 4.

Therefore, in this embodiment as well, substantially the same effects as in the first embodiment can be obtained. In addition, the structure of the first embodiment described above can be further simplified.

Although the present invention has been described above with reference to specific embodiments, the present invention is not limited to the above-mentioned embodiments, but includes various embodiments within the scope of the claims for utility model registration. For example, the elastic bushing is not limited to a rubber bushing, but any other material may be used as long as it has a damping effect.

[Effect of idea]

As described above, according to the present invention, vibration transmission is prevented by interposing the first elastic bushing and the second elastic bushing having a damper action in the pin joint portion that connects the push rod portion and the clutch pedal. As a result, there is no need to provide a rubber damper in the push rod portion (between the push rod and the clevis) as in the conventional case.

Therefore, the length of the push rod portion consisting of the push rod and the clevis can be set to a predetermined length that ensures the piston stroke of the clutch master cylinder as in the past. Also, as a result,
When fixing the clutch master cylinder to the dartshi panel, it is sufficient to attach the mounting flange directly to the dartshi panel as usual, or by installing a bracket between the clutch master cylinder and the dartshi panel as before, or by changing the entire body of the clutch master cylinder. There's no need.

Therefore, the present invention maintains the existing positional relationship between the clutch master cylinder and the clutch pedal.
Since this can be done by rearranging the connection structure of the clevis to the clutch pedal, it can be easily applied to existing vehicles that do not have measures to prevent vibration transmission.

Further, according to the present invention, the clevis and the pin are coupled via the first elastic bushing, and the pin and the clutch pedal are further coupled via the second elastic bushing, which is a so-called two-stage vibration absorption structure. Therefore, the vibrations transmitted to the clevis are absorbed by the damper action of the first elastic bushing. Even if vibration were to be transmitted to the pin, it would be reliably absorbed by the damper action of the second elastic bit. Therefore, transmission of vibration to the clutch pedal can be effectively prevented. Moreover, since it has a structure that absorbs vibrations in the two stages mentioned above,
It can be designed compactly and can be easily applied to the connection between the clevis and the clutch pedal, where there are large space constraints.

Further, according to the present invention, since the first elastic bushing is provided with a flange portion that prevents the side surface of the clevis from coming into contact with the side surface of the clutch pedal, vibration transmission due to the side surface contact between the two can also be prevented. As a result,
It is possible to completely block vibration transmission from the clevis of the push rod section to the clutch pedal.

Furthermore, when inserting the pin in the final assembly stage to connect the clevis to the clutch pedal, if the pin is inserted in an inclined or eccentric state, the elastic bushing located on the opposite side may fall off due to the pin. Sometimes it happens. However, according to the present invention, the flange portion provided on the first elastic bushing reliably prevents the first elastic bushing from falling off.
Therefore, it is also possible to improve the ease of assembly.

Furthermore, according to the present invention, the location where the elastic bush that absorbs vibrations is installed is the connection between the push rod and the clutch pedal, and since this connection is normally located inside the vehicle, it is also thermally stable. It is also in the most advantageous position in terms of space arrangement with other equipment components.

Furthermore, compared to conventional vibration transmission prevention structures, the number of parts and the number of parts to be machined can be reduced, resulting in an effect of reducing costs.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional vibration isolation structure in which a rubber damper is provided in the push rod portion of the clutch master cylinder, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, Figs. 3 and 4. is the first part of this invention
This shows a vibration-proof connection structure between the push rod part of the clutch master cylinder and the clutch pedal according to the embodiment, and FIG. 3 is a partially cutaway front view, and FIG. 4 is a cross-sectional view taken along the line - in FIG. 3. 5 and 6 show a vibration-proof connection structure between the push rod part of the clutch master cylinder and the clutch pedal according to the second embodiment of the present invention, and FIG. 5 is a partially cutaway front view. , Figure 6 is - of Figure 5.
It is a sectional view along a line. Explanation of symbols, 1...clutch master cylinder,
2... Push rod section, 3... Push rod, 4... Clutch pedal, 5... Pin, 6...
Clevis, 11... Clevis mounting hole, 12
...Clutch pedal mounting fitting hole, 13...Clip, 15...Rubber bushing (first elastic bushing), 15a...Flange portion, 16...Pipe,
17... Wave washer, 18... Rubber bush (second elastic bush).

Claims (1)

[Claims for Utility Model Registration] A clevis is fixed to the end of a push rod of a clutch master cylinder, and the clevis is further connected to the clutch pedal with a pin to connect the push rod and the clutch pedal, wherein the clevis A first elastic bushing having a flange portion that prevents the side surface of the clevis from coming into contact with the side surface of the clutch pedal is interposed between the mounting hole formed in the pin and the pin, and A vibration-proof connection structure between a clutch master cylinder push rod and a clutch pedal, characterized in that a second elastic bush is interposed between the formed mounting fitting hole and the pin.