JPS5850110Y2 - 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 inner cable is fixed, so when the clutch disc wears out, a problem arises in that the play in the clutch level 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.

Another object of the present invention is to provide a cable-type clutch release device that can effectively suppress variations in clutch pedal play due to manufacturing and assembly errors.

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

In FIG. 1, a flywheel 1 is fixed to a crankshaft 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 with bolts 6, and a predetermined portion of a diaphragm spring 7 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 joined to the outer periphery of the diaphragm spring 7 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 that comes into contact with the center portion of the diaphragm spring 7 is disposed on the outer periphery of the cylindrical portion of the bearing retainer 150 that is aligned with and protrudes from the shaft 3.
A clutch release bearing bub 17 equipped with a clutch release bearing bub 17 is provided so as to be slidable in the axial direction.

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

An outer cape 25 that covers the inner cable 20 contacts a bushing 21 attached to a clutch housing 26 at one end, and a bushing 29 attached to a dash panel 28 at the other end.

The clutch pedal 33 as a main arm member is rotatably supported around a pedal boss 34 fixed to the body, and is provided with a pedal pad 35 at its lower end.

The secondary arm member 36 is rotatably supported around the pedal boss 34 and is provided with a stopper 37 that limits the relative rotation of the clutch pedal 33 with respect to the secondary arm member 36 when the clutch pedal 33 is depressed in the depression direction 42 .

The circular ratchet member 38 is provided with a cable guide 39 on its upper circumference for guiding the inner cable 20.
A ratchet 40 is formed at the lower periphery.

The other end of the inner cable 20 is fastened to a location 41 on the ratchet member 38.

The pawl member 45 has a pawl 46 that engages with the ratchet 40, and is rotatably supported by the sub arm member 36 via a pin 44.

The return spring 47 has both ends fixed to the ratchet member 38 and the ears 34 of the auxiliary arm member 36, respectively, and prevents the inner cable 20 from bending.

Pedal stopper 4 whose protrusion amount from the body 48 can be adjusted
9 can come into contact with the secondary arm member 36 and limit the return movement of the narrow arm member 36 in the return direction 50 .

The return spring 51 has both ends fixed to the ears 54 and the body 48 of the clutch pedal 33, respectively, and biases the clutch pedal 33 in the return direction 50.

The stopper 52 is provided on the secondary arm member 36 so as to face the stopper 3T, and limits the return movement of the clutch pedal 33 with respect to the secondary arm member 36 in the return direction 50.

A pin spring 53 serving as a connecting member has both ends fixed to the pawl member 45 and the clutch pedal 33, respectively.

As the pedal pad 35 is depressed, the clutch pedal 33 rotates around the pedal boss 34 in the depression direction 42 against the return spring 51.

The depression movement of the clutch pedal 33 is transmitted to the pawl member 45 via the pin spring 53, thereby causing the pawl member 45 to rotate clockwise in the figure around the pin 44.

In this way, when the depression amount of the clutch pedal 33 reaches a, the pawl 46 engages with the ratchet 40 and the clutch pedal 33 comes into contact with the stopper 37 of the arm member 36.

The pin spring 53 absorbs the relative rotation of the clutch pedal 33 with respect to the narrow arm member 36 when the pawl 46 engages the ratchet 40 before the clutch pedal 33 contacts the stopper 31 of the secondary arm member 36 .

After the pawl 46 engages with the ratchet 40 and the clutch pedal 33 contacts the stopper 37, the clutch pedal 33
, the secondary arm member 36, and the ratchet member 38 rotate together, and the inner cable 20 is pulled toward the clutch pedal 33.

As a result, the center portion of the diaphragm spring 7 is pressed toward the flywheel 1 by the release bearing 16, and the clutch is released.

When the clutch pedal 33 is released, the pawl 46 and the ratchet 40 are maintained in engagement until a predetermined return amount, and the clutch pedal 33, the secondary arm member 36, and the ratchet member 38 are moved by the return spring 51. It rotates integrally in the return direction 50.

When the return amount reaches a predetermined value, the secondary arm member 36 comes into contact with the pedal stopper 49 and its return movement is restricted.

However, the clutch pedal 33 is returned by the return spring 51 in the return direction 50 by the play a and comes into contact with the stopper 52 of the auxiliary arm member 36.

At this time, due to the relative rotation of the clutch pedal 33 in the return direction 50 with respect to the auxiliary JR member 36, the pawl member 45 is pulled via the pin spring 53, the engagement between the ratchet 40 and the pawl 46 is disengaged, and the inner cable 20 is clutch pedal 33
The side ends are free.

In this way, the release bearing 16 is moved away from the flywheel 1 depending on the amount of wear on the clutch disk 13, and the pressing force of the pressure plate 11 is maintained appropriately regardless of the amount of wear on the clutch disk 13.

Depending on the amount of wear on the clutch disc 13, the inch cable 20 will be in a position where it is pulled by the clutch force, and the rotational position of the ratchet member 38 will change, which has an effect equivalent to adjusting the length of the inner cable 20. .

Therefore, when the clutch pedal 33 is next depressed, the engagement position of the pawl 46 with the ratchet 40 changes in relation to the amount of wear on the clutch disc 13, and the clutch pedal 33
The play in is maintained at a constant value a.

2 and 3 show an embodiment in which a ratchet mechanism is provided on the clutch side and in the middle of the inner cable 20, respectively.

Portions corresponding to those in FIG. 1 are indicated by the same numerals and suffixed with ``C'' and ``C'', and only characteristic portions will be explained.

In the embodiment shown in FIG. 2, the ratchet member 38b is provided integrally with the release fork 18b, and the main arm member 59 is fixed to the clutch side end of the inner cable 20b, and plays the same role as the aforementioned clutch pedal 33 in the ratchet mechanism. fulfill.

In FIG. 3, main arm member 60 is coupled to clutch pedal 33c via inch cable 20c and serves the same role as clutch pedal 33 described above in the ratchet mechanism.

Thus, according to the present invention, the clutch pedal 33.33
When the claws 46b and 33c are released, the pawls 46b and 46c are disengaged from the ratchets 40, 40b and 40c.

The rotational position of 40c changes in relation to the amount of wear on the clutch disc 13, and the rotational position of the clutch pedals 33, 33b.

Ratchets when stepping on 33c) 40, 40b.

The engagement position of the pawls 46, 46b, and 46c with the clutch disc 40c changes depending on the amount of wear on the clutch disc 13.

Therefore, the play of the clutch pedals 33, 33b, 33c is maintained at a constant value regardless of the wear of the clutch disc 13.

According to the present invention, the play of the clutch pedal 33 is
6, 36b, 36c stopper 37° 37b, 37c
and the stoppers 52, 52b, 52c, manufacturing and assembly can reduce errors in the upper play.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the main parts of an embodiment in which the ratchet mechanism is provided on the clutch side,
FIG. 3 is a diagram showing the main parts of an embodiment in which a ratchet mechanism is provided in the middle of the inner cable. 1...Flywheel, 7...Diaphragm spring, 11...Pressure plate, 13...Clutch disc, 16...
・・Release bearing, 20---Inner cable, 33.33b, 33c・・Clutch pedal, 35・・Pedal pad, 36° 36b, 3
6c”...-Secondary arm member, 37, 37b, 37c・
...Stopper, 49, 49b, 49c...
・Stopper, 52, 52b, 52c = stopper, 38° 38b, 38c = latch member, 40.40
b. 40c...Ratchet, 42, bending/depression direction, 45°45b, 45c""claw member, 46.46b, 4
6c...Claw, 50...Return direction, 51
...Return spring, 53, 53b, 53c
・"...4t!, 59, 60-- Main arm member.

Claims (1)

[Scope of utility model registration request] A clutch disc placed between the flywheel and the pressure plate, a diaphragm spring that presses the clutch disc against the flywheel via the pressure plate, and a diaphragm spring that is in constant contact with the diaphragm spring and operated in the axial direction by the clutch pedal via a cable. In a constant contact type clutch equipped with a release bearing, the first arm member swings in conjunction with depression of a pedal pad, and the second arm member swings about the swing axis of the first arm member. an arm member, a ratchet member having a ratchet and provided to be swingable around the swing axis of the first arm member and interlocking with a release bearing; a ratchet member having a pawl that can engage with the ratchet of the ratchet member; 2
a claw member rotatably supported by the arm member, a connecting member having both ends fixed to the claw member and the first arm member, and a second arm provided on the second arm member when the pedal pad is depressed. a first stopper for limiting relative movement of the first arm member with respect to the member; a first stopper provided on the second arm member to limit relative movement of the first arm member with respect to the second arm member when the pedal pad is released; a second stopper that biases the first arm member in the return direction, a return spring that biases the first arm member in the return direction, and a third stopper that limits return movement of the second arm member.
Cable-type clutch release device for constant contact clutch.