JPS629143Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch operating mechanism, and more particularly to a clutch operating device that can automatically adjust the operating stroke of the clutch to be substantially constant regardless of wear of the clutch facing.

Clutches, which are generally installed in automobiles, consist of a flywheel fixed to the crankshaft, a pressure plate that rotates integrally with the flywheel and can move in the axial direction, and a transformer disposed between these. It is equipped with a clutch disk that moves in the axial direction on the transmission shaft, and under normal conditions, these three are compressed by a spring placed behind the pressure plate, and the engine torque is transferred by mutual frictional force. The information is configured to be transmitted to the mission.

In addition, in order to cut off such torque transmission, the pressure plate is separated by a link mechanism etc. by pressing the clutch pedal against the spring force of the spring, thereby loosening the crimp and thereby cutting off the power transmission. I'm starting to do it.

As the clutch facing (mainly the surface of the clutch disk) progresses, the operating stroke of the clutch increases, and the clutch engagement or disconnection position of the clutch pedal changes, and in some cases, the clutch pedal may not be depressed. Even in this state, the clutch is in a half-clutch state in which it is not completely connected, which further accelerates the wear of the clutch facing. And this situation is common to all friction clutches.

On the other hand, as described in Japanese Patent Publication No. 50-6692, a rod connected to one end of the clutch cable is passed through a hole in a locking plate that is activated as the clutch pedal rotates; The hole is formed so that the angle of the locking plate relative to the axis of the rod can change by a predetermined angle as the clutch pedal rotates, and by changing the angle formed between the locking plate and the rod, the clutch can be locked. When the clutch is released, the hole in the locking plate and the rod are forcibly fitted to prevent relative movement between the two, but when the clutch is connected, the fory fit is released to allow relative movement between the two in the axial direction. Clutch release mechanisms have been devised that automatically adjust the operating stroke of the clutch.

However, in such a clutch release mechanism, slight variations in the dimensions of the contact surface within the hole of the locking plate greatly affect the angle of inclination of the locking plate, so when the clutch is released, sufficient surface pressure is applied to the rod and pry. Forming the hole in the locking plate so as to fit therein requires relatively high processing precision. In addition, each time the clutch is operated, a high surface pressure is applied to the restraining part (pry part) of the inner peripheral surface of the hole of the locking plate in a relatively small area so that a large frictional force can be obtained to prevent the rod from slipping. At the same time, since the hole in the locking plate and the rod slide against each other, the restraining portion is likely to wear out, and during long-term use of the clutch pedal, the frictional force between the locking plate and the rod when the clutch is released increases. There is a risk of instability. In order to prevent the holes in the lock plate from being worn out, it is necessary to make the lock plate from a material with excellent wear resistance, or to apply a surface treatment such as hardening to the hole part. , there were problems such as an increase in the manufacturing cost of the device.

Based on the above-mentioned circumstances, the present invention has been developed to eliminate the need for high processing precision of the connection part that connects the clutch pedal and the clutch cable so that they can move relative to each other in the axial direction of the clutch cable, and to enable the connection part to move as the clutch is operated. The object of this invention is to provide a clutch operating device that has almost no wear and is capable of always reliably adjusting the operating stroke of a friction clutch regardless of the wear of the facings. (a) a first threaded member to which a clutch cable is connected at one end and is provided with an engaging portion extending in the longitudinal direction; and (b) a cylindrical outer circumferential surface provided on the first threaded member. (c) the first screw member is inserted through the screw member so as to be movable in the axial direction, and one side opposite to the clutch cable is connected to the second screw member; (d) a holding member that can come into contact with the end face on the clutch cable side; (e) a rotation prevention part that prevents relative rotation about the axis of the holding member with respect to the holding member; (f) a clutch pedal that is rotatably provided around one axis and to which a clutch operation force is applied to one end; (g) a lever that is rotatably provided around an axis parallel to the one axis of the clutch pedal and that supports the holding member so as to be rotatable around an axis parallel to the one axis of the clutch pedal;
a stopper that prevents relative rotation of the lever with respect to the clutch pedal in a direction in which the holding member moves toward the clutch cable; (h) a stopper that prevents the second screw member from rotating relative to the clutch pedal; A tightening force on the second threaded member when the second threaded member is wound in an elastically tightened state and pushed in a direction that loosens the second threaded member with respect to the first threaded member. (i) a coil spring having an arm at one end that increases the tightening force and decreases the tightening force in the opposite case; an engaging member comprising a pair of working surfaces that abut the arms of the coil spring from opposite sides in the circumferential direction of the coil spring and reciprocate the arms when the angle exceeds a predetermined certain angle; , the clutch operating device is configured to include.

Hereinafter, embodiments of the present invention will be described in more detail based on the drawings.

A clutch cable 1 is guided by an outer cable 2, and one end is connected to a bolt 3, and the other end is connected to a release fork of a clutch (not shown). When a tensile force is applied to the cable 1 to the right in Figure 1, the link mechanism disconnects the clutch, and when the tensile force is released, the cable 1 is pulled back to the left by the spring inside the clutch and the clutch is closed. connection is made. The bolt 3 is inserted into a through hole 6 formed in the center of the holding member 4 shown in FIG. By being brought into contact with one end surface of the cable 4, the force of movement toward the cable 1 side is prevented. Further, a notch plane 5 is formed in the bolt 3 by notching it over a predetermined length in the axial direction. This cutout plane 5 constitutes the engaging portion of this embodiment. The nut 7 has a cylindrical shape as a whole, and a pair of coil springs 8 and 9 are fitted to the outer peripheral surface of the nut 7 to elastically tighten the nut 7, as shown in detail in FIGS. 2 and 3. ing. The first coil spring 8 has an arm 11 extending outward from one end thereof, and when the arm 11 is fixed and rotated in the direction in which the nut 7 is tightened, the nut 7 can be tightened more strongly. It is wound in different directions and serves to prevent the nut 7 from rotating in the tightening direction. The second coil spring 9 is wound in the same direction as the first spring 8, and has an arm 12 that extends from one end to the opposite side to the arm 11 of the first spring 8, and this arm 12 lifts upward. When the arm 12 is moved, the nut 7 is tightened more strongly and the nut 7 is rotated in the loosening direction as the arm 12 moves. A retaining ring 13 is attached to the end of the nut 7 to prevent the springs 8 and 9 from coming off the nut 7.

The holding member 4 has a pair of boss portions 1 on both sides thereof.
4 and 16 are formed, and the holding member 4 is connected to the clutch pedal 22 by a pair of levers 19 and 21 that are fitted into the pair of boss portions 14 and 16 at holes 17 and 18. Lever 1
9 and 21 have through holes 23 and 24, and a shaft member 28 with a head is inserted into the through holes 23 and 24 and a through hole 27 formed above the boss portion 26 of the pedal 22.
It is rotatably connected to the pedal 22 by. The end of the shaft member 28 is caulked to prevent it from coming off. Note that a spacer 29 is inserted between the pedal 22 and one lever 21. Lever 1
At the bottom of 9 and 21 are legs 31 and 32 that are split into two.
is formed. The legs 31 and 32 are the pedals 22
The leg portion 31 engages with the boss portion 26 when the pedal 22 is depressed a certain amount, and the lever 1
9 and 21 are rotated integrally with the pedal 22, thereby transmitting the rotational force of the pedal 22 to the holding member 4. Therefore, in this embodiment, the leg portion 31 and the boss portion 26 function as a stopper.

A longitudinal fixing member 33 extending in the axial direction of the nut 7 is disposed on the outside of one of the levers 19 . The fixing member 33 is attached to the holding member 4 in the elongated hole 34.
It is fixed to the holding member 4 by a nut 30 that extends from the boss portion 14 and fits into a double-chamfered male threaded portion 36, and is screwed into the male threaded portion 36 from the outside. One end of the fixing member 33 is provided with a slot 35 that engages with the arm 11 of the first spring 8, and the fixing member 33 holds the arm 11 in place by this engagement. There is. At the other end of the fixing member 33 is a rotation preventing portion 3 that contacts the cutout plane 5 of the bolt 3 and prevents the bolt 3 from rotating relative to the holding member 4.
7 is formed. Therefore, in this embodiment, the rotation preventing portion 37 functions as a rotation preventing portion.

A longitudinal adjusting member 38 (engaging member) is disposed on the outside of the other lever 21 so as to extend laterally of the nut 7. The adjusting member 38 is rotatably fitted to the boss portion 16 in the through hole 39 and is prevented from coming off by the nut 30, and a notch 41 formed at one end thereof.
An engaging portion 40 extending from the lever 21 is engaged with the lever 21, so that the adjusting member 38 rotates integrally with the lever 21. The mutually opposing side surfaces 42 and 43 of the notch 41 function as working surfaces in this embodiment, and
When the reciprocating rotation angle of the lever 21 due to the operation of the pedal 22 exceeds a predetermined certain angle, the notch 4
The arms 12 of the second spring 9 inserted into the spring 1 are brought into contact with the arms 12 of the second spring 9 from opposite sides, respectively, and the arms 12 are caused to reciprocate in the circumferential direction of the spring 9. The position of the notched side surface 42 is determined so that it will come into contact with the arm 12 from above just when the pedal 22 is depressed to the end of its stroke with the arm 12 in its normal position.
The position No. 3 is determined so that the pedal 22 contacts the arm 12 from below at the moment the pedal 22 is returned to the clutch engagement position.

Next, the operation of the clutch operating device having the above structure will be explained.

First, press the clutch pedal 22 to disengage the clutch.
When the lever 21 is depressed and rotated clockwise in FIG. This leads to engagement. Legs 3
1 engages with the boss portion 26, the lever 21 is rotated integrally with the pedal 22 in the same direction, thereby transmitting the rotational force of the pedal 22 to the holding member 4. Then, the holding member 4 is moved to the right in FIG. 1, and the clutch cable 1 is pulled in the same direction, thereby disconnecting the clutch.

When the facing of the clutch disk wears out due to repeated engagement and engagement of the clutch, the leg 31 of the lever 21 and the boss 2 of the pedal 22 are damaged during the process in which the pedal 22, which is depressed to disengage the clutch, is returned by a return spring (not shown).
This causes a shift in the disengagement position with 6. That is, in the stroke in which the pedal 22 is pulled back, the engagement between the leg portion 31 of the lever 21 and the boss portion 26 of the pedal 22 connects the clutch, and the return movement of the cable 1 and the holding member 4 is prevented by the outer cable 2. Therefore, it is released when the lever 21 can no longer be rotated counterclockwise together with the pedal 22, but when the facing of the clutch disk is worn, the cable 1 and the holding member 4 are pulled back more than usual. Become. Therefore lever 2
1 and the adjusting member 38, which rotates integrally with the adjusting member 1, are also rotated counterclockwise more than usual. As the adjusting member 38 rotates more, its notched side surface 43 comes into contact with the arm 12 of the second spring 9 and is lifted further upward. When the arm 12 is lifted upward, the nut 7 is tightened by the spring 9 and rotated in the direction of loosening the bolt 3 (counterclockwise in FIG. 2). The wear of the clutch disc is compensated for by being pushed out (to the left in the figure).

Furthermore, when the pedal 22 is rotated clockwise in the next stroke, the adjuster member 38 is rotated in the same direction, and its notched side surface 42 pushes the arm 12, which has been pushed higher than usual by the above operation, downward. Push back. At this time, the arm 12 is moved in the direction of loosening the second spring 9, but since the second spring 9 is fitted into the nut 7 in a state where it is elastically tightened, the second spring 9 is inserted into the nut 7. A tightening force based on the frictional force with the spring 9 acts. However, when this tightening force is applied to the nut 7, the first spring 8 acts to prevent the nut 7 from rotating, so the nut 7 is not tightened. Therefore, only the second spring 9 is rotated, and the arm 11 is returned to its original position.

By returning the second spring 9 to its original position, it is in a position to compensate for further wear of the clutch disc, and thus during clutch operation or clutch pedal 22. The clutch disengagement or engagement position will always be maintained properly.

In the above embodiment, the bolt 3 connected to the clutch cable 1 and the nut 7 screwed thereto can be arranged in the reversed relationship, and the lever 21 and the adjustment member 38 can be formed integrally. The first coil spring 8 can be replaced with another one-way clutch, and the second coil spring 8 can be omitted if sufficient friction resistance can be expected between the nut 7 and the holding member 4. It is sufficient that the lever is rotatable relative to the clutch pedal and is attached to the clutch pedal in a state where rotation toward the clutch cable beyond a certain limit is prevented. For example, as shown in Fig. 4, a lever 49 rotatably attached around a boss portion 46 of the clutch pedal 45 and prevented from rotating beyond a certain angle by the engagement of an elongated hole 47 with an engagement pin 48 fixed to the clutch pedal 45 can also achieve the same object.

As described in detail above, the device according to the present invention engages and disengages the clutch by moving the screw member connected to the clutch cable by the rotation of the clutch pedal, and when the facing of the clutch disk becomes worn, the screw member connected to the clutch cable is moved by the rotation of the clutch pedal. The clutch disk is configured to automatically loosen the members by a corresponding amount to compensate for wear on the clutch disk, and, compared to the past, the clutch pedal and clutch cable are aligned in the axial direction of the clutch cable. The connecting parts that are movably connected to the clutch, that is, the first threaded member, the second threaded member, the holding member, etc., do not require much processing precision, and the connecting parts are almost always worn out as the clutch is operated. In addition, the clutch engagement/disengagement position is always held constant during clutch operation or during the depression stroke of the clutch pedal.

[Brief explanation of the drawing]

Fig. 1 is a side view of a clutch operating device which is an embodiment of the present invention, Fig. 2 is a front view of the same, and Fig. 3 is a side view of a clutch operating device according to an embodiment of the present invention.
FIG. 3 is an exploded view of the apparatus shown in FIGS. FIG. 4 is a schematic diagram showing the main parts of a clutch device according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Clutch cable, 3... Bolt (first screw member), 4... Holding member, 5... Notch plane, 7... Nut (second screw member), 9... Second coil spring , 12...arm, 21,
49... Lever, 22, 45... Clutch pedal, 26, 46... Boss portion, 28... Shaft member, 3
1, 32...leg part, 37...rotation stop part, 38...
... Adjustment member (engaging member), 42, 43
...Notch side (action surface), 47...Elongated hole, 48...
...Engagement pin.

Claims (1)

[Claims for Utility Model Registration] A first threaded member to which a clutch cable is connected at one end and is provided with an engaging portion extending in the longitudinal direction; and a cylindrical outer peripheral surface, the first threaded member The screwed second screw member and the first screw member are inserted through the screw member so as to be movable in the axial direction, and one side opposite to the clutch cable is connected to the clutch cable side of the second screw member. a holding member that can come into contact with an end face of the holding member; and a holding member that is integrally provided with the holding member, and that is configured to rotate the axis of the first screw member relative to the holding member based on engagement with the engaging portion of the first screw member. a rotation prevention part that prevents relative rotation about the center; and a rotation prevention part that is elongated and rotatable at an intermediate part about an axis that is substantially perpendicular to the axes of the first screw member and the second screw member. a clutch pedal provided at one end to which a clutch operation force is applied; and a clutch pedal rotatable about the one axis of the clutch pedal or about an axis parallel to the one axis at the other end of the clutch pedal. a lever that supports the holding member rotatably about an axis parallel to the one axis of the clutch pedal; and a lever that is oriented so that the holding member moves toward the clutch cable relative to the clutch pedal. a stopper that prevents relative rotation; the second screw member is wound around the outer peripheral surface of the second screw member in an elastically tightened state; a coil having an arm at one end that increases the tightening force against the second screw member when the coil is pushed in a direction to loosen the second screw member, and decreases the tightening force in the opposite case; a spring, which is integrally provided with the lever, and when the reciprocating rotation angle of the lever due to the clutch pedal operation exceeds a predetermined certain angle, the arm of the coil spring is provided with a spring that rotates in the circumferential direction of the coil spring; and an engaging member having a pair of working surfaces that abut each other from opposite sides to reciprocate the arm.