JPS5850108Y2 - Cable type clutch release device for constant contact type clutch - Google Patents

Description

[Detailed description of the invention] This invention is a cable-type clutch release device for a constant-contact clutch in which the diaphragm spring of the clutch and the release bearing are in constant contact, and the movement of the clutch pedal is transmitted to the release fork via a cable. Regarding.

For example, in a clutch provided between an engine and a transmission, the length of the inch cable is fixed, so when the clutch disk wears out, a problem arises in that the play of the clutch pedal changes.

The purpose of this invention is to
To provide a cable type clutch release device for a constant contact type clutch that is automatically adjusted so that play of a clutch pedal can be maintained constant.

Next, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, a flywheel 1 is fixed to a clutch shaft 2 of an engine (not shown) and supported by an input shaft 3 of a transmission (not shown) via a pilot bearing 4 so as to be relatively rotatable.

The clutch cover 5 is fixed to the flywheel 1 by bolts 6, and a predetermined portion of the diaphragm spring T is supported by a pivot ring 8.

The pressure plate 11 is supported by the clutch cover 5 via a strap (not shown) at a predetermined location on its outer periphery, and is further coupled to the outer periphery of the diaphragm spring 1 by a retracting spring 12 .

The clutch disc 13 is disposed between the flywheel 1 and the pressure plate 11 and is fixed to a bub 14, which is spline-fitted to the shaft 3.

A clutch release bearing 16 is provided on the outer periphery of the cylindrical portion of the bearing retainer 15 that is formed to protrude in alignment with the shaft 3 and that comes into contact with the center portion of the diaphragm spring 7.
A clutch release bearing hub 17 is equipped to be slidable in the axial direction.

The release fork 18 is swingably supported around a shaft 19 at one end, coupled to the release hub 17 at the middle, and coupled to the inner cable 20 at the other end.

The outer cable 25 covering the inner cable 20 is
One end abuts against a bush 27 attached to the clutch housing 26, and the other end abuts against a bush 29 attached to the dash panel 28.

The clutch pedal 33 includes a first clutch pedal member 35 having a pedal pad 34 at the lower end and a second clutch pedal member 36, both of which are attached to the body. It is rotatably supported by a fixed pedal boss 37.

The return spring 38 as a tension spring has both ends connected to the first
is fixed to the clutch pedal member 35 and the body 39,
The first clutch pedal member 35 is biased in the return direction 40.

A spring 41, likewise a tension spring, is fixed at both ends to the first and second clutch pedal elements 35, 36, respectively, and biases the second clutch pedal element 36 in the return direction 40.

The pedal stopper 45 whose protrusion amount can be adjusted is attached to the body 39.
are fixed to the first and second clutch pedal members 35
．． 36, and prevents the return movement of both.

The fan-shaped member 46 is rotatably supported by the pedal boss 37 and is provided with a cable guide 41 on one periphery and a ratchet 48 on the other periphery.

The inch cable 20 passes through the dash panel 28 and is fastened to one end 49 of the cable guide 41.

The pawl member 53 is rotatably supported by the second clutch pedal member 36 via a pin 54, and is provided with a pawl 55 at one end that can be engaged with the ratchet 48.

A spring 59 is wound around and attached to pin 54 and biases pawl member 53 in a direction that disengages pawl 55 from ratchet 48 .

The contact pin 60 is fixed to the first clutch pedal member 35 and can contact the other end 61 of the pawl member 53 .

The tension spring 62 has both ends connected to the ears 6 of the fan-shaped member 46, respectively.
3 and the ear portion 64 of the first clutch pedal member 35 to prevent the inch cable 20 from slacking.

When the pedal pad 34 is depressed, the first clutch pedal member 35 rotates in the depression direction 67 around the pedal boss 37.

Despite the depression movement of the first clutch pedal member 35 in the depression direction 67, the second clutch pedal member 36 is maintained in contact with the pedal stopper 45 due to the tensile force of the spring 41.

Accordingly, the first and second clutch pedal members 35.
36, and the other end of the claw member 53 is
The contact pin 60 of the first clutch pedal member 35 rotates clockwise in the figure against the force of the spring 59.

In this way, when the amount of depression of the first clutch pedal member 35 reaches a predetermined play a (FIG. 2), the pawl 55 of the pawl member 53 engages with the ratchet 48.

After the pawl 55 and the ratchet 48 are engaged, the first clutch pedal member 35 is depressed as the first clutch pedal member 35 is depressed. The second clutch pedal member 35 , 36 and the sector member 46 rotate together around the pedal boss 37 , and the clutch pedal 33
As the amount of depression increases, the inner cable 20 is pulled toward the clutch pedal 33, which causes the release bearing 16 to push the center portion of the diaphragm spring 7 toward the flywheel 1, causing the pressure plate 11 to separate from the flywheel 1 and release the clutch. is in a free state.

The engagement between the pawl 55 and the ratchet 48 is such that the other end of the pawl member 53 is connected to an abutment pin 6 integral with the first clutch pedal member 35.
0, and this bias is not released during the depression movement of the first clutch pedal member 35.

After the pawl 55 and the ratchet 48 are engaged, a reaction force from the ratchet 48 side is applied to the pawl 55, and the ratchet 48
Depending on the shape of the pawl 55 and the positional relationship between the reaction force and the pin 54, the reaction force exerts a rotational moment on the pawl member 53 that causes the pawl 55 to disengage from the ratchet 48.

Therefore, in a normal ratchet mechanism, during the stepping motion, the reaction force from the ratchet 48 promotes the engagement between the claw 55 and the ratchet 48 (the
(clockwise in the figure) so as to act on the pawl member 53 as a rotational moment, that is, so as to cause self-locking.
It is necessary to consider the dimensions, shapes, etc. of the ratchet 48 and pawl 550.

The structure for self-locking is that the pawl 55 is a ratchet 48
However, in the present invention, the reaction force F is applied to the pawl member 53 counterclockwise in FIGS. 1 and 2. Even when a rotational moment acts on the pawl member 53 in the direction, the abutment pin 60 prevents the pawl member 53 from rotating in the disengagement direction.
The structure for self-locking around the rotation center can be omitted.

During the return movement of the clutch pedal 33, the engagement between the pawl 55 and the ratchet 48 is still maintained during the first period; The second clutch pedal member 35,36 and the sector member 46 move around the pedal boss 37 in the return direction 4.
0, and the release bearing 16 also moves in the direction away from the flywheel 1.

Since the second clutch pedal member 36 has advanced in the return direction 40 from the first clutch pedal member 35 by an angle b (FIG. 2) corresponding to the aforementioned play a, the second clutch pedal member 36 The clutch pedal member 35 contacts the pedal stopper 45 first.

Since the rotational moment acting from the return spring 38 on the first clutch pedal member 35 is greater than that from the spring 41, the first clutch pedal member 35 is pulled by the return spring 38 against the return spring 41 and has a free play a After moving slightly, it comes into contact with the pedal stopper 45 (FIG. 1).

The first clutch pedal member 35 during the period corresponding to the play a
That is, since the movement of the abutment pin 60 allows rotation of the pawl member 530 in the counterclockwise direction, the pawl member 53 is rotated by the spring 59, and the pawl 55 is removed from the ratchet 48.

In this way, in the final position of the clutch pedal 33, the clutch pedal 33 and the inner cable 20 are disconnected, so the release bearing 16 is connected to the clutch disc 1.
The clutch disk 13 can be separated from the flywheel 1 according to the amount of wear of the clutch disk 13, and an appropriate pressing force by the diaphragm spring 7 is maintained when the clutch is engaged, regardless of the wear of the clutch disk 13.

The inch cable 20 is pulled toward the clutch side in relation to the amount of wear on the clutch disc 13, and the rotational position of the fan-shaped member 46 changes. The ratchet 48 engages at a predetermined location depending on the rotational position of the fan-shaped member 46, which is determined by the amount.

In other words, the same effect as when the inner cable dimension of the exposed portion of the outer cable 25 increases due to wear of the clutch disc 13 can be obtained.

FIGS. 4 to 6 are perspective views of other embodiments of the present invention, and show the positional relationships among the various elements when the clutch pedal 33 is released and depressed, respectively.

In the embodiment described above, the tension spring 41 was used as a means for pressing the second clutch pedal member 36 against the pedal stopper 45, but in this embodiment, the compression spring 65 is used to press the pin 66 of the first clutch pedal member 35. The second clutch pedal member 36 is wound and attached to the second clutch pedal member 36 to urge the second clutch pedal member 36 toward the pedal stopper 45 .

During the depression movement, the opening of both ends of the spring 65 is reduced, and a relative movement of an angle corresponding to the play a occurs between the first and second clutch pedal members 35 and 36, and after this,
Pawl 55 engages ratchet 48 .

As described above, according to the present invention, when the clutch pedal 33 is released, the coupling between the clutch pedal 33 and the inner cable 20 is released, and the release bearing 16 is movable depending on the amount of wear of the clutch disc 13. At the same time, the rotational position of the fan-shaped member 46, that is, the ratchet 4
The position of 8 is also adjusted in relation to the amount of wear on the clutch disc 13.

Ratchet 4 related to the amount of wear on the clutch disc 13
8 is equivalent to an automatic adjustment of the length of the inch cable 20, and when the clutch pedal is depressed, the spring 41 or 65 causes a change in the position between the first and second clutch pedal members 35, 36. A relative movement occurs, and with this relative movement, the contact pin 60 rotates the pawl member 53, and when the amount of depression of the first clutch pedal member 35 reaches a predetermined play a, the pawl 55 engages with the ratchet 48. From then on, the depression motion of the clutch pedal 33 is transmitted to the inner cable.

In this way, the play of the clutch pedal 33 can always be maintained at a level regardless of the amount of wear on the clutch disc 13.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the embodiment of the present invention when the clutch pedal is released, Fig. 2 is a diagram showing the positional relationship between each element when the clutch pedal is depressed by the amount of play a, and Fig. 3 is a diagram showing the positional relationship between each element when the clutch pedal is depressed by the amount of play a. A schematic diagram showing a self-locking structure that is omitted in the present invention,
FIG. 4 is a perspective view of another embodiment of the present invention, and FIGS. 5 and 6 are diagrams showing the positional relationship between each element of the embodiment of FIG. 4 when the clutch pedal is released and during the depression movement, respectively. be. DESCRIPTION OF SYMBOLS 1...Flywheel, 7...Diaphragm swing, 11...Freshure plate, 13...Clutch disc, 16...
...Release bearing, 18...Release fork, 20...Inner cage full, 33...
...Clutch pedal, 34...Pedal pad, 35...First clutch pedal member, 36.
...Second clutch pedal member, 3T...
・Pedal boss, 38...Return spring, 40...
...Return direction, 41.65...HaQ 45-
...-Pedal stopper, 46...Sector-shaped member, 4
8...Ratchet, 53...Claw member,
54...Pin, 55...Claw, 59...
... Spring, 60 ... Contact pin, 61 ...
...Other end.

Claims (1)

[Scope of utility model registration request] Controls the clutch disc located between the flywheel and the pressure plate, the diaphragm spring that presses the clutch disc against the flywheel via the pressure plate, the release bearing that is in constant contact with the diaphragm spring, and the axial position of the release bearing. a first clutch pedal member rotatably supported having a pedal pad at a lower end; a second clutch pedal member supported so as to be rotatable about a rotation axis; a first spring biasing the first clutch pedal member in the return direction; a first spring biasing the second clutch pedal member in the return direction; The cable has a second spring for biasing, a stopper for limiting the return movement of the first and second clutch pedal members, and a ratchet, and is connected to the other end of the cable to align the axis of rotation of the first clutch pedal member. a ratchet member rotatably supported around the ratchet member; a pawl member having a pawl at one end that can be engaged with the ratchet of the ratchet member and rotatably supported on a second clutch pedal member; a pawl of the pawl member; a third spring that biases the pawl member in a direction in which the pawl member is disengaged from the ratchet of the ratchet member;
and a cable-type clutch release device for a constant-contact clutch, characterized in that the first clutch pedal member is provided with an abutting member that can abut on the other end of the pawl member.