JPS6141450Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clutch release device in which the release bearing and the tip of the release lever are in constant contact even when the clutch is engaged.

As the facing of the clutch disk wears, the tip of the release lever becomes more extended when the clutch is engaged, that is, closer to the released state. In the case of a constant contact type clutch, for example, as shown in FIG. The shape of the time gradually changes from A to B shown by a two-dot chain line. At that time, the release bearing 4, which is in constant contact with the release lever 3, is adjusted to the shaft 5 according to the change.
It is necessary to slide the upper part of the release lever 3 so that the release bearing 4 does not remain in the compressed state of the release lever 3. For this reason, conventionally, the stopping position of the release bearing 4 on the shaft 5 has been manually adjusted. However, manual operation is time-consuming and has the disadvantage that if even a slight adjustment is made, the clutch disk 1 cannot be sufficiently clamped between the pressure plate 2 and the flywheel 6, causing the clutch 100 to slip.

On the other hand, in a constantly non-contact type clutch where the release bearing 4 is separated from the tip of the release lever 3 when the clutch is connected, in recent years the clearance between the tip of the release lever 3 and the release bearing 4 has been automatically adjusted to prevent wear of the clutch disk 1. Clutch release devices have been developed to keep the clutch release at a constant level, but they are complex, have a large number of parts, and are expensive.
It is unsuitable for application to clutch release devices.

In view of the above, the present invention has been developed to automatically change the stopping position of the release bearing 4 on the shaft 5 when the clutch is connected in accordance with the progress of wear of the clutch disc 1, so that a good clutch is always maintained without manual adjustment. To provide a clutch release device for a constant contact type clutch which can maintain 100 connections, has a simple structure, and is inexpensive.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a partial vertical cross-sectional view of the push-type clutch release device of the present invention in a clutch-connected state. The tip 9b of the tongue 9 of the collet 8 is provided with a female thread 10 and a tapered portion 11, and the flange 12 of the collet 8 abuts against a stopper 13 that is integral with the vehicle body (not shown) on which the clutch release device is installed. ing. The shape of the collet 8 in its free state is generally cylindrical, as can be seen in more detail in FIG. It is slightly open to the side. Further, the tongue portion 9 has a plurality of tongues 9 forming the tongue portion 9.
a, and a gap 14 exists between the tips 9b of each adjacent tongue 9a. A first rod 15 is slidably inserted into the collet 8, and one end 15a of the first rod 15 outside the collet 8 is rotatably connected to the clutch pedal deck 16 via a shaft 22. . A stepped portion 15c is provided on the cylindrical end 15b of the first rod 15 in the collet 8, and the inner flange 12a of the collet 8 abuts against the stepped portion 15c to restrict movement of the rod 15 in the reverse Y direction. . edge 15
A taper portion 17 is provided at the tip of b, which comes into contact with the taper portion 11 of the collet 8 when the clutch is disconnected, and acts to reduce the diameter of the tongue portion 9 of the collet 8. A stepped portion 15d is provided between the tapered portion 17 and the tapered portion 17. A spring 20 is compressed between the step portion 15d and the flange portion 12a of the collet 8. Cylindrical end 15b
A second rod 18 is slidably inserted therein, and one end 18a of the rod 18 outside the cylindrical end 15b abuts one end 7a of the release hawk 7. Rod 1
A male thread 19 is provided on the outer surface of the cylinder 8, and a male thread 19 is provided in the space between the opposing cylindrical end 18b of the rod 18 and the cylindrical end 15b of the rod 15 in the direction of pushing out the rod 18 from inside the cylindrical end 15b. A spring 21 is compressed so as to provide a force. The release hawk 7, with which one end 18a of the rod 18 abuts, is in contact with the release bearing 4 at one end (FIG. 1). On the other hand, the clutch pedal 16 has one end 16a.
It is rotatably supported by a vehicle body (not shown), and rotatably supports the first rod 15 via a shaft 22. The spring 23 has one end fixed to the vehicle body, and the other end is hooked to the hole 16b of the pedal 16, and constantly biases the pedal 16 in the direction of the arrow X. Furthermore, the spring loads of the springs 20, 21, and 23 are the smallest for the spring 21 and the largest for the spring 23.

If the clutch pedal 16 is depressed from the state shown in Fig. 2 when the clutch is engaged (in the opposite direction of arrow X),
First, the first rod 15 moves in the direction of arrow Y. At this time, the contracted spring 20 acts to keep the collet 8 in contact with the stopper 13 without being moved by the movement of the rod 15, so that the tapered portion 17 of the rod 15 is brought into contact with the taper portion 11 of the collet 8. come into contact with When the pedal 16 is further depressed, the tapered portion 17 slides on the tapered portion 11, and as a result, the diameter of the tongue portion 9 is reduced and the female thread 10 is inserted into the second
The rod 18 is engaged with the male thread 19, resulting in the state shown in FIG. The spring force of the tongue portion 9 is determined to such an extent that the state shown in FIG. 4 is obtained when the pedal 16 is depressed and the rod 15 moves in the direction of arrow Y.

In the state shown in FIG. 4, the rods 15, 18 and the collet 8 are integrated against the force that moves the rod 15 in the direction of the arrow Y. Therefore, if the pedal 16 is further depressed from this state, the total rod length L, which is the distance between the one end 15a of the rod 15 and the one end 18a of the rod 18, will not change, and will change with respect to the other springs 20, 21, 23. The release lever 3 (FIG. 1), which has an extremely large spring load, is overcome and one end 7a of the release fork 7 is pushed out in the direction of the arrow Y, and as a result, the release fork 7 that comes into contact with the fulcrum 24 pushes the release bearing 4 in the direction of the arrow Z. When moved, the release bearing 4 slides on the shaft 5 and compresses the release lever 3, and the clutch 100 is in the disengaged state. Rod 1 at that time
5, 18 and the collet 8 are shown in FIG.

When the pedal 16 is released from the disengaged state of the clutch 100 shown in FIG. 5 (in the direction of the arrow X in FIG. 2), the clutch 100 returns to the state shown in FIG. 2 through the state shown in FIG. 4 and stops, and the clutch 100 is connected. .

When the clutch disc 1 wears out, the release lever 3 when the clutch is connected gradually changes from the state A in FIG. As shown by the chain line, the state changes from A' to B'. As a result, the cylindrical end 18b of the second rod 18 is fitted more deeply into the cylindrical end 15b of the first rod 15, and the total rod length L indicates the state when the clutch is connected without wear of the clutch disk 1. Compared to FIG. 2, FIG. 6, which shows the state when the clutch is connected after wear, is shorter by _L1 .

When the clutch pedal 16 is depressed from the state shown in FIG. 6, the rods 15, ₁ are moved as shown in FIG.
8 and collect 8 are integrated, and then the fifth
The clutch becomes disconnected as shown in the figure. Similarly, when transitioning from the clutch disengaged state to the connected state, the overall rod length L remains short by _L1 , and changes from the state shown in Fig. 5 to the state shown in Fig. 4, and then from the state shown in Fig. 6. Return to the clutch connection state shown in .

In this way, in the present invention, the change in the stopping position of the tip of the release lever 3 when the clutch is connected due to wear of the clutch disk 1 can be prevented by simply changing the engagement position of the female thread 10 of the collet 8 on the male thread 19 of the second rod 18. Therefore, no matter how worn the clutch disc 1 is, the state in which the release bearing 4 is lightly pressed against the tip of the release lever 3 can always be automatically maintained when the clutch is connected, and the clutch 100 can always be connected and disconnected reliably. Therefore, the depression stroke of the clutch pedal 16 can also be automatically maintained constant.

FIG. 7 is a partial vertical cross-sectional view of a pull-type clutch release device according to yet another embodiment of the present invention in a clutch-connected state. Collection 2
A female screw 27 and a tapered portion 28 are provided at the tip 26a of the tongue portion 26 of No. 5, and the flange 29 of the collet 25 is in contact with a stopper 31 integral with the vehicle body (not shown) via a cover 30. Collection 25
The shape of the collet 8 is generally cylindrical like the collet 8 shown in FIG. A gap is provided between the tongues 26. The collet 25 is slidably fitted into the large cylindrical portion 32a of the first rod 32. A small cylindrical portion 32b, which integrally forms the first rod 32 with the large cylindrical portion 32a, is connected to a clutch pedal 41 via a connecting shaft 33. End portion 3 of large cylindrical portion 32a
2c abuts against a step 25a provided on the collet 25 to restrict movement of the rod 32 in the direction opposite to the arrow Y'. The inner surface of the large cylindrical portion 32a is provided with a tapered portion 34 that comes into contact with the tapered portion 28 of the collet 25 to reduce the diameter of the tongue portion 26 of the collet 25 when the clutch is disconnected. A stepped portion 32d is provided between the portions 32c. Step portion 32d and step portion 25b of collect 25
A spring 35 is compressed between them. A second rod 36 is slidably supported by the small cylindrical portion 32b and the cover 30, one end 36a of the rod 36 has a larger diameter than the other part of the rod 36, and a male thread is provided on the cylindrical surface. 37 are provided.
The other end of the rod 36 is connected to the release fork 7'. A spring 39 is stretched between the hole 7'a of the release fork 7' and a portion 38 of the vehicle body. The spring load of the spring 39 is such that the release fork 7' is always lightly pressed against the release bearing 4 when the clutch is connected (FIG. 1), and is small enough that the release lever 3 is not affected. The clutch pedal 41 is rotatably supported by a support shaft 42 that is integral with the vehicle body, and one end of the clutch pedal 41 rotatably supports one end of the connecting shaft 33 of the first rod 32 via a shaft 43. A spring 44 has one end fixed to the vehicle body, and the other end is hooked to a hole 41a of the pedal 41, constantly urging the pedal 41 in the direction of arrow X'. 40 is an O-ring.

From Fig. 7, which shows the clutch connected state, when the clutch pedal is depressed in the reverse X' direction, the connecting shaft 3
3, the first rod 32 is pulled in the direction of arrow Y'. As a result, the tapered portion 34 bites into the tapered portion 28, the diameter of the tongue portion 26 is reduced, and the female thread 27
meshes with the male thread 37, and the first rod 32 and the second rod
The rod 36 and the collet 25 are integrated. When the pedal is further depressed, the rods 32, 36 and the collector 25 move together in the direction of arrow Y', causing one end 7'a of the release fork 7' to move in the direction of arrow Y'.
When pulled in the Y' direction, the fork 7' moves the release bearing 4 in the Z direction as shown in FIG. 1, and the clutch 100 is disengaged.

In FIG. 7, which shows the connected state of the clutch 100, as the clutch disk 1 wears out, the stop position of the release fork 7' gradually moves from A'' to B'' indicated by a two-dot chain line. Along with this movement, the second rod 36 moves in the direction opposite to the arrow Y', but the first rod 32 and the collect 25 are moved in the direction opposite to the arrow Y' from the position shown in FIG. 7 by the stopper 31. Can not. As a result, a change in the stop position of the release fork 7' due to wear of the clutch disk 1 only changes the engagement position between the male thread 37 and the female thread 27 on the second rod 36 when the clutch is disengaged. Therefore, when the clutch is connected, no matter how worn the disc 1 is, the state in which the release bearing 4 is lightly pressed against the tip of the release lever 3 can be automatically maintained, and the clutch is always connected and disconnected reliably. , the depression stroke of the clutch pedal can also be automatically maintained constant.

As explained above, the present invention can be applied to both push-type and pull-type clutch release devices, and automatically adapts to changes in the posture of the release lever 3 due to wear of the clutch disc 1, ensuring a good clutch release at all times. It has the advantage of being economical because it allows disconnecting and disconnecting operations and requires no manual adjustment at all, and has a simple structure with a small number of parts. Moreover, the tapered portions 11, 17, 28,
34 to connect the male threads 19, 37 to the female threads 10, 2.
7, the deeper the clutch pedals 16, 41 are depressed, the stronger the engagement between the male screws 19, 37 and the female screws 10, 27 becomes. Since there are no sliding parts in the clutch 100, there is no chance of a poor connection of the clutch 100.
Furthermore, in a typical release device, it is necessary to limit the rotation of the clutch pedal by a stop 50 as shown by the two-dot chain line in FIG. 2, but in the present invention, the stop 50 is unnecessary.

[Brief explanation of the drawing]

Fig. 1 is a schematic longitudinal cross-sectional view of a constant contact type clutch, Fig. 2 is a longitudinal cross-sectional view of a push-type clutch release device according to an embodiment of the present invention when the clutch is connected, and Fig. 3 is a perspective view of the collet in Fig. 2. , FIG. 4 is a longitudinal sectional view showing one state of the clutch release device, FIG. 5 is a longitudinal sectional view showing the state of the clutch release device in the clutch disengaged state, and FIG. 6 is a longitudinal sectional view of the clutch release device when the clutch disc is worn out. FIG. 7 is a longitudinal cross-sectional view of another embodiment of a pull-type clutch release device when the clutch is connected. 3... Release lever, 4... Release bearing, 7, 7'... Release fork, 8, 25... Collet, 9, 26... Tongue,
10, 27...Female thread, 11, 17, 28, 34
... Taper part, 13 ... Stopper, 15, 32 ...
...1st rod, 16, 41...clutch pedal,
18, 36...Second rod, 19,37...Male thread, 100...Clutch.

Claims (1)

[Scope of utility model registration request] A clutch release device in which the release bearing and the tip of the release lever are in constant contact even when the clutch is connected includes a collet with a female thread and a tapered portion at the tip of the tongue, a stopper for restricting the movement of the collet, and the collet. a first end which is slidable relative to the first end and which is connected to the clutch pedal at one end and has a tapered part at the other end which acts to reduce the diameter of the tongue of the collet by coming into contact with the tapered part of the collet when the clutch is disengaged;
a second rod having a male thread on its cylindrical surface that is slidably inserted into the first rod at one end, the other end engages one end of the release fork, and engages the female thread of the collet when the clutch is disengaged. A clutch release device characterized by comprising a rod.