JPH06300052A - Clutch device - Google Patents

Abstract

PURPOSE:To improve the synchronous meshing performance of a transmission by reducing the inertial weight of a clutch device when a clutch is cut off. CONSTITUTION:A clutch hub 21 is spline-fitted on the input shaft 20 of a transmission, and a clutch hub 22 is fitted in a rotatable manner on the input shaft on the transmission side. A clutch plate 23 is installed on the clutch hub 22, and the clutch hubs 21 and 22 have the outer splines 21a and 22a in the input shaft direction. A clutch sleeve 31 has an annular groove 32 on the outer periphery, and has a slidable inner spline 31a in the outer splines 21a and 22a. The top edge of a shift fork 33 whose basic edge is fixed on a pressure plate 19 is inserted into an annular groove. When the clutch is connected, the inner spline 31a is engaged with the outer splines 21a and 22a, and when the clutch is cut off, the inner spline 31a shifts to the transmission side, together with the pressure plate 19, and is engaged with only the outer spline 21a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch device provided between an engine and a transmission. More specifically, the present invention relates to a clutch device for improving the synchromesh performance of a transmission.

[0002]

2. Description of the Related Art Synchronous meshing performance of a transmission of this type is mainly determined by a synchronous capacity, which is a synchro size of a transmission main body, and a synchro load caused by inertia weights of a transmission and a clutch device. On the other hand, in the clutch device, the clutch hub is spline-fitted to the input shaft of the transmission and is always connected to the input shaft to rotate integrally.

[0003]

Therefore, when the clutch device becomes large-sized, the inertia weight of the clutch device becomes large, the synchro load increases, and the synchromesh performance of the transmission deteriorates. An object of the present invention is to provide a clutch device that can improve the synchronous engagement performance of the transmission by reducing the inertia weight of the clutch device when the clutch is disengaged by providing a synchronizing mechanism in the clutch hub.

[0004]

The structure of the present invention for achieving the above object will be described with reference to FIGS. 1 and 2 corresponding to the embodiments. The clutch device according to the present invention includes a first clutch hub 21 that is spline-fitted to an input shaft 20 of a transmission and has a first outer spline 21a formed in the input shaft direction.
The clutch plate 23 is attached to the first clutch hub 2
The second clutch hub 22 rotatably fitted to the input shaft 20 closer to the flywheel than the first outer shaft 1 and has the second outer splines 22a formed in the same direction at the same pitch as the first outer splines 21a at the transmission end. And a clutch sleeve 3 having an annular groove 32 formed on the outer periphery and an inner spline 31a slidable on the first and second outer splines 21a, 22a.
1 and a shift fork 33 having a base end fixed to a pressure plate 19 for pressing the clutch plate 23 to the flywheel 12 via the facing 27 and a tip inserted into the annular groove 32.

The characteristic construction is that the inner spline 31a of the clutch sleeve 31 is engaged with both the first outer spline 21a and the second outer spline 22a (FIG. 1) when the clutch is engaged, and the inner spline of the clutch sleeve 31 is disengaged when the clutch is disengaged. The spline 31a moves to the transmission side together with the pressure plate 19 so as to engage only with the first outer spline 21a.

[0006]

When the clutch device is operated to disengage the clutch, the flywheel 12 and the pressure plate 19 are separated from the clutch plate 23, so that the rotational torque of the engine is not transmitted to the second clutch hub 22. At the same time, the shift fork 33 disengages the inner spline 31a of the clutch sleeve 31 from the second outer spline 22a.
The second clutch hub 22 separates from the first clutch hub 21. As a result, the second clutch hub 22 to which the clutch plate 23 is attached becomes free with respect to the input shaft 20 of the transmission, and the synchro load of the transmission is reduced.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, a flywheel 12 is fixed to the output shaft 10 of the engine with bolts 11, and a clutch cover 14 is fixed to the flywheel 12 with bolts 13. A yoke 17 that pivotally supports the release lever 16 at a fulcrum A is fixed to the clutch cover 14 by a nut 18, and the base end of the lever 16 is further pivotally supported at a fulcrum B by a pressure plate 19. As a result, the flywheel 12, the clutch cover 14, and the pressure plate 19 rotate integrally.

The input shaft 2 of the transmission is on the same line as the output shaft 10.
0 is placed. The input shaft 20 has an outer spline 20.
a is formed, and the first clutch hub 21 is fitted into the spline 20 a and rotates integrally with the input shaft 20. The first clutch hub 21 has a first shaft in the input shaft direction.
The outer spline 21a is formed. First clutch hub 2
A collar 20b is provided on the input shaft 20 on the flywheel side of
And a collar 20c is further fitted to the collar 20b. The second clutch hub 22 is rotatably and slidably fitted in the collar 20c in the input shaft direction. Color 2
0b and 20c cover the outer spline 20a of the input shaft 20 and connect the first clutch hub 21 to the stop ring 20.
Hold it together with d. A second outer spline 22a (FIG. 1) is formed at the transmission-side end of the second clutch hub 22 at the same pitch as the first outer spline 21a in the same direction.

A clutch plate 23 and a retaining plate 24 are attached by stud pins 26 on both sides of the second clutch hub 22. Facing members 27 are arranged on both sides of the clutch plate 23, and these are arranged between the flywheel 12 and the pressure plate 19. The pressure plate 19 is a clutch spring 28.
Facing the clutch plate 23 by the elastic force of the
Press contact with the flywheel 12 via 7. 29 is a damper spring.

A clutch sleeve 31 having an inner spline 31a slidable on the outer splines 21a and 21b is fitted to the first clutch hub 21 and the second clutch hub 22. An annular groove 32 is formed on the outer circumference of the clutch sleeve 31. The tip of the shift fork 33 is inserted into and engaged with the annular groove 32, and the base end of the shift fork 33 has a support portion 1 extending from the pressure plate 19.
It is fixed to 9a by a bolt 34 and a nut 36. In this example, the support portion 19a is provided so as to be displaced toward the transmission so that the tip of the shift fork 33 is inserted into the annular groove 32. Although not shown, the support portion 19a and the shift fork 3
There are three 3 and they protrude from the pressure plate 19 in the direction of the center thereof at intervals of 120 degrees.

As shown in FIG. 2, when the clutch is engaged, the inner spline 31a of the clutch sleeve 31 corresponds to the first outer spline 21.
a and the second outer spline 22a (FIG. 1) are engaged with each other, and as shown in FIG. 1, when the clutch is disengaged, the inner spline 31a moves to the transmission side together with the pressure plate 19 so that only the first outer spline 21a is formed. Determined to engage. For this purpose, the pressure plate 1 of FIG.
When the maximum displacement amount of 9 is m and the maximum movement amount of the clutch sleeve 31 is n, it is determined that m ≧ n. A known release bearing 37 is provided on the input shaft 20 on the transmission side of the first clutch hub 21.
And the release bearing hub 38 is fitted. Hub 38
The release fork 39 is provided so as to abut.

The operation of the clutch device having such a configuration will be described. (a) When the clutch is engaged (when the clutch device is not operated): As shown in FIG. 2, the pressure plate 19 is engaged when the clutch is engaged.
Presses the clutch plate 23 against the flywheel 12, so that the shift fork 33 moves the clutch sleeve 31 to the flywheel side. That is, the second clutch hub 2
2 is spline-fitted with the clutch sleeve 31, the clutch sleeve 31 is spline-fitted with the first clutch hub 21, and this clutch hub 21 is also spline-fitted with the input shaft 20.

As a result, since the clutch plate 23 is sandwiched between the flywheel 12 and the pressure plate 19, the rotational torque of the engine is transmitted from the flywheel 12 to the clutch plate 23 and the second clutch hub 22 connected to the clutch plate 23. Is transmitted to the first clutch hub 21 via the clutch sleeve 31.
As a result, the rotational torque of the engine is reduced by the input shaft 20 of the transmission.
Be transmitted to.

(B) When the clutch is disengaged (when the clutch device is operated): When a clutch pedal (not shown) is depressed, the release fork 39 shown in FIG.
To the flywheel side, release bearing 3
The tip of the release lever 16 is moved to the flywheel side (arrow C in FIG. 2) via 7. Release lever 16
Rotates about the fulcrum A and displaces its base end in the direction of arrow D in FIG. As a result, as shown in FIG. 1, the pressure plate 19 separates from the clutch plate 23, and the flywheel 12 separates from the clutch plate 12.

As a result, the rotational torque of the engine is not transmitted to the second clutch hub 22. At the same time, the shift fork 33 is moved as shown in FIG.
Move from the position indicated by the two-dot chain line to the position indicated by the solid line.
Since the inner spline 31a of the clutch sleeve 31 is disengaged from the second outer spline 22a, the second clutch hub 22
Separate from the first clutch hub 21. As a result, the second clutch hub 2 having the clutch plate 23 attached thereto
2 is free with respect to the input shaft 20 of the transmission. Here, when the shift operation of the transmission is performed, the inertia weight of the clutch device is reduced, so that the synchro load of the transmission is reduced and the shift operation is smoothly performed.

(C) When the clutch is disconnected and connected: When a clutch pedal (not shown) is released, the elastic force of the clutch spring 28 causes the release lever 16 to move in the direction opposite to the above (b), causing the pressure plate 19 to re-engage. Is pressed against the flywheel 12. The situation when the shift fork 33 moves due to the movement of the pressure plate 19 will be described with reference to FIG.

As shown in FIG. 3 (a), the shift fork 3
Before the movement of No. 3, the inner spline 3 of the clutch sleeve 31
The chamfer 1a faces the chamfer of the outer spline 22a of the second clutch hub 22. As shown in FIG. 3B, when the shift fork 33 moves, the spline chamfers of the clutch sleeve 31 and the clutch hub 22 come into contact with each other, and when the chamfer of the spline 31a further enters, the chamfer of the spline 22a slides,
(C) and the inner spline 3 as shown by the chain double-dashed line in FIG.
1a is fitted to the outer spline 21a.

Due to the above relationship, when the pressure plate 19 moves to the flywheel side, first, the clutch sleeve 31 and the second clutch hub 22 are engaged, and when the engagement is completed, the pressure plate 19 is completed.
Presses the clutch plate 23 against the flywheel 12. As a result, the clutch hub 22 and the clutch sleeve 3
The rotational torque of the engine is not transmitted in the insufficient spline connection state of 1 and each spline is not damaged.

[0019]

As described above, in the conventional clutch device, the clutch hub, to which the clutch plate is attached, is spline-fitted to the input shaft of the transmission and is always connected and integrally rotated. However, according to the present invention, a synchronizing mechanism is provided in the clutch hub to connect the transmission and the clutch when operating the clutch device. Since it is configured to turn off the gear, it is possible to improve the synchronous meshing performance of the transmission and smoothly perform the gear shifting operation.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a clutch device according to an embodiment of the present invention when a clutch is disengaged.

FIG. 2 is a sectional view of the clutch device when the clutch is connected.

FIG. 3 is a view showing the engagement state of each spline between the clutch sleeve and the second clutch hub from the time of clutch disengagement to the time of connection.

[Explanation of symbols]

 12 Flywheel 19 Pressure Plate 20 Transmission Input Shaft 21 First Clutch Hub 21a First Outer Spline 22 Second Clutch Hub 22a Second Outer Spline 23 Clutch Plate 27 Facing 31 Clutch Sleeve 31a Inner Spline 32 Annular Groove 33 Shift Fork

Claims (1)

[Claims] 1. A first clutch hub (21) having a first outer spline (21a) formed in the input shaft direction (20) of a transmission by spline fitting, and a clutch plate (23) mounted Is rotatably fitted to the input shaft (20) on the flywheel side of the first clutch hub (21) and has the same pitch as the first outer spline (21a) at the end on the transmission side in the same direction. Second outer spline
A second clutch hub (22) having (22a) formed therein, and an inner spline (31a) having an annular groove (32) formed on the outer periphery and slidable on the first and second outer splines (21a, 22a). The formed clutch sleeve (31) and the pressure plate (19) for pressing the clutch plate (23) to the flywheel (12) via the facing (27) are fixed at their base ends to the annular groove. A clutch device including a shift fork (33) to be inserted into (32), wherein the inner spline (31a) of the clutch sleeve (31) is the first outer spline (21a) and the second outer spline when the clutch is engaged. (22a) is engaged, and when the clutch is disengaged, it is moved to the transmission side together with the pressure plate (19) and is engaged only with the first outer spline (21a). apparatus.