JPS5846268Y2 - Fork assembly for clutch release - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a clutch that is operated by pressing a torque transmitting member such as a diaphragm spring or pawl with a release fork, and in particular to a clutch release fork assembly for automobiles.

Conventionally, clutch devices for automobiles consist of a clutch cover assembly attached to the flywheel on the engine side, and a clutch release bearing assembly that slides in the axial direction on a portion of the front cover retainer protruding from the transmission side. and a release fork that engages with the clutch release bearing assembly to perform a release operation.

Among these, a part of the front cover glue retainer plays an important role in supporting the clutch release bearing in the radial direction, but because it is integrally formed or combined with the cover of the input bearing on the transmission side, it has a complicated shape. It has drawbacks such as a large number of machining steps, poor precision of parts, heavy weight9, and high manufacturing costs.

Furthermore, in a clutch device with this structure, it is not possible to reduce the amount of eccentricity (misalignment) between the torque transmission member and the release bearing to zero due to the accuracy of the parts that make up the device and installation errors during assembly. As a result, abnormal slippage occurs on the contact surfaces between the two, resulting in uneven wear).Also, extremely unpleasant abnormal noises are generated, and the operation of the clutch pedal becomes heavy.

In addition, in a clutch device with this structure, the center of engine rotation and the input shaft on the transmission side are arranged in a straight line, so there is a lot of freedom in design when the length is restricted in the axial direction like in recent front-wheel drive cars. There were problems such as small size.

In order to solve these conventional problems, this invention supports the release bearing assembly directly with the release fork, and the positioning of the release bearing assembly is performed by the retaining part between the release fork and the bearing holding member. It is compact and easy to manufacture, and has the function of automatically aligning and holding the rotation center of the IJ+ bearing assembly with respect to the rotation center of the torque transmission member such as the diaphragm spring and pawl. Crutchley IJ allows for versatile use
The present invention provides a fork assembly for + lenses.

Next, an explanation will be given of an embodiment of the device of this invention shown in FIG. With the release fork,
Each has a long hole 3, 3', and can be slid in the axial direction by engaging with a pin 4, 4' fixed to the control shaft 1, and can swing and rotate in the same direction as the control shaft 1. is configured to do so.

Protrusions 5, 5 are provided at the tips of the forks 2, 2', respectively.
' and contact surfaces 6, 6', and the projections 5, 5
' is engaged with the elongated holes 9, 9' provided in the connecting part 8°8' of the bearing holding member 7, and at the same time, the two of the release fork are engaged.
A coil spring 10 is installed between the clutch control shaft 1 and the clutch control shaft 1 as a guide, and a pressing force is applied to the release fork contact surface 6.6' and the connecting portions 8, 8' of the bearing holding member. It is formed to generate an appropriate frictional force.

The bearing holding member I is attached to the outer ring 12 of the release bearing 11 to hold the bearing, and the end surface 14 of the inner ring 13 of the bearing is in contact with the side surface of the diaphragm spring 15.

In the clutch release fork assembly configured as described above, in a normal state (clutch connected state), the inner ring end surface 14 of the release bearing is held in a state where it is lightly pressed against the side surface of the diaphragm spring 15. , the inner ring 13 is constantly rotating due to the rotation of the engine.

When the clutch is accidentally operated (disengaged), the release fork 2 is activated by the oscillating rotation of the clutch control shaft 1 when the release lever is operated.
, 2' swing and rotate, the protrusion 5, at the fork tip.
5' and the contact surface 6°6' is moved toward the engine, and the inner ring end face 14 of the bearing is moved toward the engine.
strongly presses the inner side surface of the diaphragm spring 15 to cause it to bend.

As a result, the outer circumferential portion of the diaphragm spring 15 is configured to reverse and move toward the side opposite to the engine, so that the pressing force (clutch plate tightening force) of the pressure play 417 (not shown) in contact with the diaphragm spring 15 is eliminated. The clutch is disengaged.

When acting in this way, if the rotation center of the diaphragm spring side and the rotation center of the release bearing 11 are eccentric (in the case of misalignment), the rotation center of the release bearing 110 is aligned with the rotation center of the diaphragm spring by the pressing force. A centripetal force is generated to move the bearing, and this centripetal force directly acts on the bearing holding member 1 and the forks 2, 2' that support the bearing. , 3'i- and 9,9', it is possible to move in any direction within the dimension range of this elongated hole, and moreover, the engaging portion is subjected to a frictional force due to the spring 10. Therefore, the centripetal force causes the release bearing 11, the bearing holding member T and the release fork 2,
2' is also moved to a position corresponding to the rotational center position of the diaphragm spring, and when it is aligned at position 1 where the eccentricity has been corrected, the centripetal force disappears and the diaphragm spring is held at that position by the frictional force of the spring.

The one shown in FIG. 3 is a modified embodiment in which the release bearing is configured for rotating the outer ring, and in this case, the bearing holding member 1a fits into the inner diameter of the inner ring to hold the bearing.

Further, since the fork contacts the bearing holding member 7a from the outside, a tension spring is used as the pressing spring 10a.

Furthermore, in the embodiment shown in FIG. 4, the release fork is integrally formed, and an elastic buffer member 17, 17' is inserted in the engagement portion with the bearing holding member 1b.

As mentioned above, the clutch release fork assembly according to this invention has a structure in which the release bearing assembly is directly supported by the fork, so a part of the conventional transmission front cover glue retainer is not required. The front cover has a compact and lightweight structure, which can significantly reduce processing man-hours and costs.

The combination of the casing, fork, and bearing holding member allows
Since it is equipped with an automatic alignment mechanism, if the center of rotation of the diaphragm spring in contact with the rotating side raceway of the release bearing is eccentric to the center of rotation of the release bearing, the rotation of the diaphragm spring will be adjusted when the first clutch is released. Because it automatically aligns with the center and maintains its position, it prevents the conventional problems caused by eccentricity, such as vibration, abnormal noise, and uneven wear on the contact surface between the diaphragm spring and the bearing raceway. It is possible to solve problems such as the difficulty of pedal operation.

Furthermore, according to the device invented by this invention, it is possible to use not only the conventional arrangement of the engine and transmission in series, but also a parallel arrangement, which makes it possible to arrange the engine and transmission in parallel. It has the advantage of having a large degree of freedom regarding arrangement.

In the embodiments shown in FIGS. 1 and 2, an inner ring rotating type was used, but this may also be used in an outer ring rotating type as shown in FIG.
Also, the engagement between the fork and the bearing holding member can be applied to either an inner or outer combination.

Furthermore, in the embodiment, the protrusion 5 was provided on the fork side, but
It is also possible to provide this in the bearing holding member and provide a long hole in the fork.

Further, instead of the coil spring used between the forks 2 and 2', other elastic members such as plastic, rubber, disc springs, plate springs, etc. may be used.

Similarly, the elastic buffer member attached to the engagement part with the bearing holding member in the form of the integrated release fork shown in Fig. 4 may be made of plastic, rubber, disc spring, leaf spring, etc.
It can be selected as appropriate.

In addition, in the embodiment, release control axes 1 and 7, t-
Although the pin 4 is used to engage the release control shaft 2, it may also be combined as a keyway and a keyway. As shown in FIG. 2, an elastic buffer member 19 may be installed between the two.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the clutch raising fork assembly of this invention, Fig. 2 is a side view of Fig. 1, and Figs. 3 and 4 are other embodiments of this invention. FIG. 5 is a partial sectional view showing another embodiment of this invention. In the embodiment, reference numeral 1 indicates a clutch control shaft, 2.2'
1 is a release fork, 4.4' is a pin, 7 is a bearing holding member, 10 is a coil spring, 11 is a release bearing, 15 is a diaphragm spring, and 16 is a release bearing assembly.

Claims (1)

[Scope of utility model registration request] In a clutch release device that operates a clutch by pressing a torque transmission member such as a diaphragm spring or pawl with a release fork, the release fork is supported by the control shaft so that it can move in the axial direction of the control shaft. The release bearing assembly is supported, and the release bearing is moved and its position is maintained by applying an appropriate frictional force between the tip of the release fork and the connecting portion of the bearing holding member that engages with the tip of the release fork,
A fork assembly for a clutch release, wherein the center of rotation of the release bearing assembly is automatically aligned with the center of rotation of a torque transmitting member such as the diaphragm spring or pawl.