JP2008025747A - Clutch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch device which positively releases transmission of torque. <P>SOLUTION: The clutch device 4 transmits torque and releases its transmission from an engine to an input shaft 6 of a manual transmission, and it is composed of: a flywheel 10 connected to a crankshaft 5 of the engine; a clutch disk 17 capable of transmitting torque to the input shaft 6; a pressure plate 14 pressing the clutch disk 17 against the flywheel 10 such that torque is transmitted to the input shaft 6; a release bearing 7 releasing pressing of the clutch disk 17 by a diaphragm 15 and the pressure plate 14; and sticking preventing means 16b, 18 for preventing sticking of the clutch disk 17 and the flywheel 10 when pressing of the clutch disk 17 is released by the release bearing 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a clutch device.

Conventionally, this type of clutch device is mounted on a flywheel attached to a flywheel attached to an engine crankshaft, a clutch disc assembly having a friction coupling portion disposed close to a friction surface of the flywheel, and the like. A clutch cover assembly that elastically urges the friction coupling portion to the friction surface and a release device that releases urging the friction coupling portion have been proposed.
In this device, the torque from the engine is transmitted to the input shaft of the transmission while the friction coupling portion is biased to the friction surface, and the torque from the engine is released by releasing the bias to the friction coupling portion. To prevent transmission.
JP 2004-92822 A

  However, in such a clutch device, sticking between the friction surface of the flywheel and the friction coupling portion in the clutch disc assembly or between the friction coupling portion and the pressure plate in the release device occurs, and the bias to the friction coupling portion is released. Even so, the torque from the engine may be transmitted to the input shaft of the transmission.

  The clutch device of the present invention aims to reliably cancel torque transmission. Claim 1 is a clutch device that transmits torque from the prime mover to the input shaft of the mechanical mechanism and releases transmission. A torque input member connected to the output shaft of the prime mover, a torque transmission member capable of transmitting the torque to the input shaft, and pressing the torque transmission member against the torque input member to transmit the torque to the input shaft. A pressure member that can transmit to the pressure member, a pressure release unit that releases the pressure of the torque transmission member by the pressure member, and when the pressure transmission member releases the pressure, the torque transmission member and the A sticking prevention means for preventing sticking to the torque input member.

  A second aspect of the present invention is that the pressing member is connected to the torque input member, and the sticking prevention means is means for preventing sticking between the torque transmitting member and the pressing member.

  According to a third aspect of the present invention, the torque transmission member is disposed between the torque input member and the pressing member, and the sticking prevention unit releases the pressing of the torque transmission member by the press releasing unit. When the torque transmission member is positioned at a neutral position between the torque input member and the pressing member, the torque transmission member and the torque input member are prevented from sticking to each other. .

  According to a fourth aspect of the present invention, the sticking prevention means is a means having an elastic member capable of positioning the torque transmission member at the neutral position.

  According to a fifth aspect of the present invention, the torque transmission member has a hub portion that is spline-engaged with the input shaft, and the sticking prevention means includes a first cam surface formed on an outer peripheral surface of the input shaft, A means having a second cam surface formed on the inner peripheral surface of the hub portion, and the elastic member arranged so that an elastic force can act on the first cam surface and the second cam surface; is there.

  According to a sixth aspect of the present invention, the first cam surface and / or the second cam surface is formed as an annular groove, and the elastic member is a ring member formed in a substantially C shape. .

  Further, the mechanical mechanism is a manual transmission mechanism that manually switches between different gear ratios that can be switched.

  The present invention is a clutch device for transmitting and releasing torque from a prime mover to an input shaft of a mechanical mechanism, a torque input member connected to the output shaft of the prime mover, and the torque on the input shaft. A torque transmitting member that can transmit the torque, a pressing member that presses the torque transmitting member against the torque input member, and that allows the torque to be transmitted to the input shaft, and releases the pressing of the torque transmitting member by the pressing member. The pressure release means comprises: a pressure release means; and a sticking prevention means for preventing the torque transmission member and the torque input member from sticking when the pressure transmission member is released by the pressure release means. The torque transmission member and the torque input member are prevented from sticking after the pressing of the torque transmission member to the torque input member is released by the means. It reaches releasing torque from the prime mover when it can be reliably prevented from being transmitted to the input shaft of the mechanical mechanism via the torque input member.

  The pressing member is connected to the torque input member, and the sticking prevention means is means for preventing sticking between the torque transmitting member and the pressing member. Can be reliably prevented from transmitting the torque from the prime mover to the input shaft of the mechanical mechanism even when it is connected to the torque input member.

  Further, the torque transmission member is disposed between the torque input member and the pressing member, and the sticking prevention unit is configured to release the torque when the pressing of the torque transmission member is released by the pressing release unit. By positioning the transmission member at a neutral position between the torque input member and the pressing member, the torque transmission member is a means for preventing the torque input member from sticking. Since the transmission member is only positioned at the neutral position between the torque input member and the pressing member, sticking of the torque transmission member and the torque input member can be prevented with a simple configuration.

  Further, the sticking prevention means is a means having an elastic member capable of positioning the torque transmission member at the neutral position, and in this way, the torque transmission member is positioned at the neutral position by the elastic force of the elastic member. Can do.

  The torque transmission member has a hub portion that is spline-engaged with the input shaft, and the sticking prevention means includes a first cam surface formed on an outer peripheral surface of the input shaft, and an inner portion of the hub portion. By the means having the second cam surface formed on the peripheral surface, and the elastic member arranged to be able to act on the first cam surface and the second cam surface, in this way, The torque transmitting member can be positioned at the neutral position simply by applying an elastic force to the first cam surface formed on the outer peripheral surface of the input shaft and the second cam surface formed on the inner peripheral surface of the hub portion. .

  In addition, the first cam surface and / or the second cam surface is formed as an annular groove, and the elastic member is a ring member formed in a substantially C shape. The torque transmission member can be positioned at the neutral position with a simple configuration.

  Further, since the mechanical mechanism is a manual transmission mechanism that manually switches the gear stage having different switchable gear ratios, the torque from the prime mover is transmitted to the input shaft of the manual transmission mechanism when torque transmission is released. Can be surely prevented. As a result, it is possible to reduce the operating force during the shifting operation, and the operability of the manual transmission mechanism is improved.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a partially broken configuration diagram of a manual transmission. In a case 1a of the manual transmission 1, a transmission mechanism 2 including a plurality of transmission gears and synchronizers constituting gear stages with different transmission ratios is provided. The speed change mechanism of the speed change mechanism 2 can be switched by operating the operation lever 3, and a clutch 4 is provided in a case 1a on the left end side of the speed change mechanism 2 in the figure. Transmission of torque from the engine crankshaft 5 to the input shaft 6 of the speed change mechanism 2 and release of transmission are performed.
A release bearing 7 is externally provided on the outer periphery of the input shaft 6 so as to be movable in the axial direction. A lever clutch 8 is connected to the release bearing 7, and the lever clutch 8 is not shown by the driver of the automobile. The release bearing 7 can be moved in the release direction of the clutch 4 by operating by depressing the clutch pedal.

FIG. 2 is an enlarged configuration diagram of a portion of the clutch 4, the clutch connection state is shown above the center line, and the clutch release state is shown below the center line.
In FIG. 2, a flywheel 10 is connected to the engine crankshaft 5 via bolts 9, and a bearing 11 is provided on the shaft core side of the flywheel 10, and the input shaft 6 is connected to the bearing 11. The tip of is rotatably supported.
A clutch cover 13 is connected to the outer peripheral side of the flywheel 10 via a bolt 12, and a pressure plate 14 that rotates together with the flywheel 10 is provided in the clutch cover 13 so as to be movable in the axial direction. . Further, a disc-shaped diaphragm 15 for moving the pressure plate 14 in the axial direction is provided on the clutch cover 13, and the input shaft 6 is in contact with the release bearing 7 on the shaft core side of the diaphragm 15. It is provided in the outer periphery of this so that it can move to an axial direction.
A clutch hub 16 is provided on the outer periphery of the input shaft 6 so as to be spline-engaged and movable in the axial direction. A disk-shaped clutch disc 17 is connected to the outer periphery of the clutch hub 16. The friction coupling portion 17 a on the outer peripheral side of the clutch disk 17 is disposed between the friction surface 10 a of the flywheel 10 and the friction surface 14 a of the pressure plate 14.

As shown in the enlarged cross-sectional configuration diagram of the periphery of the clutch hub in FIG. 3, an annular groove 16 a is formed in an annular shape on the inner periphery of the clutch hub 16. The second cam surfaces 16b and 16b are formed so as to increase in diameter toward the input shaft 6 in an inclined manner. An annular groove 6a is annularly formed on the outer periphery of the input shaft 6 at a position facing the second cam surface 16b, and the diameter of the annular groove 6a is increased and inclined toward the clutch hub 16 on the left and right sides in the axial direction. First cam surfaces 6b, 6b are formed in a shape.
A circlip 18 is fitted in the annular grooves 6a and 16a. As shown in FIG. 4, the circlip 18 is composed of a C-shaped ring member having a circular cross section.

  As shown above the center line in FIG. 2, in the clutch connected state in which the friction coupling portion 17 a of the clutch disk 17 is sandwiched between the friction surface 10 a of the flywheel 10 and the friction surface 14 a of the pressure plate 14, the circlip 18 Is sandwiched between the second cam surface 16b of the annular groove 16a and the first cam surface 6b of the annular groove 6a. When the manual transmission 1 is operated in this state, the rotational force of the crankshaft 5 is input to the input shaft 6 to rotate the input shaft 6, and the circlip 18 is also rotated accordingly. Thereby, a centrifugal force acts on the circlip 18 and a horizontal component force due to this centrifugal force acts on the second cam surface 16b. This horizontal component force causes the clutch hub 16 to move in the axial direction in the direction of releasing the contact between the friction coupling portion 17a of the clutch disk 17 and the friction surface 10a of the flywheel 10, that is, in the right direction in FIG. It is working.

  When the driver depresses the clutch pedal, the lever clutch 8 is activated and the release bearing 7 moves in the release direction of the clutch 4, that is, in the left direction in FIG. 2, and the pressing force of the pressure plate 14 by the diaphragm 15 is increased. Canceled. At this time, since the above-described horizontal component force due to the centrifugal force of the circlip 18 acts on the second cam surface 16b of the clutch hub 16, the clutch hub 16 has a pressing force of the pressure plate 14 by the diaphragm 15. Along with the release, it moves axially to the right in FIG. As a result, as shown below the center line in FIG. 2, the contact between the friction coupling portion 17 a of the clutch disk 17 and the friction surface 10 a of the flywheel 10 is released, and the clutch disk 17 and the flywheel 10 are connected. Is released.

On the other hand, the release of the contact between the friction connecting portion 17a of the clutch disc 17 and the friction surface 14a of the pressure plate 14 is the same as the release of the contact between the friction connecting portion 17a of the clutch disc 17 and the friction surface 10a of the flywheel 10. It is performed by the action of.
That is, even if the clutch disk 17 moves to the right in FIG. 2 when the pressing force of the pressure plate 14 by the diaphragm 15 is released, the friction coupling portion 17a of the clutch disk 17 and the friction surface 14a of the pressure plate 14 However, when the clutch disc 17 moves to the right in FIG. 2, the circlip 18 releases the contact between the friction coupling portion 17 a of the clutch disc 17 and the friction surface 10 a of the flywheel 10. The second cam surface 16b, which is sometimes in contact with the second cam surface 16b, is in contact with the second cam surface 16b on the opposite side in the axial direction, and a horizontal component force due to the centrifugal force of the circlip 18 acts on the second cam surface 16b. The direction in which the contact between the friction coupling portion 17a of the clutch disk 17 and the friction surface 14a of the pressure plate 14 is released, that is, The clutch hub 16 is axially moved in the middle left.
Thus, it is possible to reliably prevent torque from the crankshaft 5 from being transmitted to the input shaft 6. As a result, it is possible to reduce the operating force during the shifting operation by the operating lever 3, and the operability of the manual transmission 1 is improved.

  In the first embodiment, the clutch hub 16 is moved in the axial direction using only the centrifugal force associated with the rotation of the circlip 18, and the frictional connection portion 17 a of the clutch disc 17 and the friction surface 10 a of the flywheel 10 are brought into contact with each other. In addition, the contact between the friction coupling portion 17a of the clutch disk 17 and the friction surface 14a of the pressure plate 14 is released. However, as illustrated in the circlip 118 of the modified example of FIG. The clutch hub 16 is moved in the axial direction by using a spring force in addition to the centrifugal force accompanying the rotation of the circlip 118 while maintaining the force, and the friction coupling portion 17a of the clutch disc 17 and the friction surface 10a of the flywheel 10 are moved. And the contact between the friction coupling portion 17a of the clutch disc 17 and the friction surface 14a of the pressure plate 14 are released. Good.

FIG. 6 shows a second embodiment of the clutch 4. In the second embodiment, an annular groove 6a is formed on the input shaft 6, and a first cam surface 6b is formed on the left and right of the annular groove 6a. One of the clutch hubs 16 is provided with a ball 21 urged by a spring 20 toward the annular groove 6a.
A through hole is formed in the clutch hub 16 in the radial direction, the ball 21 and the spring 20 are inserted into the through hole, the bolt 19 is tightened, and the urging force of the spring 20 is adjusted by the bolt 19. The clutch 4 is configured to abut on the first cam surface 6 b of the input shaft 6 in the connected state. At this time, a horizontal component due to the urging force of the spring 20 acts on the first cam surface 6b via the ball 19, and acts to move the clutch hub 16 axially in the right direction in FIG. ing.

  When the release bearing 7 is moved and the pressing force of the pressure plate 14 is released from the clutch disk 17, the clutch hub 16 is moved rightward in FIG. 6 by the horizontal component force acting on the first cam surface 6b. Move in the axial direction. As a result, the contact between the friction coupling portion 17a of the clutch disk 17 and the friction surface 10a of the flywheel 10 is released, and the connection between the clutch disk 17 and the flywheel 10 is released. The release of the contact between the friction coupling portion 17a of the clutch disk 17 and the friction surface 14a of the pressure plate 14 is also performed in the same manner as described in the first embodiment, but is omitted here for the sake of simplicity. In addition, since the other configuration is the same as that of the first embodiment, the same members are denoted by the same reference numerals, and redundant description thereof is omitted.

  As shown in the modification of FIG. 7, a recess 6 c is formed on the input shaft 6 side, and a spring 20 and a ball 21 are inserted into the recess 6 c so that the ball 21 is moved to the inner periphery of the clutch hub 16. You may comprise so that it may contact | abut to the 2nd cam surface 16b of the annular groove 16a formed in the surface, and the connection of the clutch disc 17 and the flywheel 10 or the pressure plate 14 may be cancelled | released.

  Next, what is shown in FIG. 8 is a third embodiment. In FIG. 8, coil springs 22a and 22b are arranged on the left and right sides of the clutch hub 16 on the outer periphery of the input shaft 6, respectively. A force for returning the clutch hub 16 to a neutral position where the connection between the clutch disk 17 and the flywheel 10 or the pressure plate 14 is released is exerted by the urging force of the coil springs 22a and 22b. That is, the urging forces of the coil springs 22a and 22b are set to be equal when the clutch hub 16 is in the neutral position.

  The clutch hub 16 is provided on the outer periphery of the input shaft 6 so as to be movable in the axial direction by spline engagement. When the clutch is engaged, that is, when the clutch disc 17 is sandwiched between the flywheel 10 and the pressure plate 14. The left coil spring 22a is contracted by receiving a pressing force, and the right coil spring 22b is extended. When the clutch is released by the movement of the release bearing 7, the left coil spring 22a is contracted. The clutch disk 17 can be satisfactorily separated from the flywheel 10 and the pressure plate 14 by exerting a force that the 22a returns to the original state, and the torque transmission can be reliably released. Since other configurations are the same as those of the first embodiment, the same members are denoted by the same reference numerals, and redundant description thereof is omitted.

Next, FIG. 9 and FIG. 10 show a fourth embodiment, and also in this example, the same members as those in the first embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.
In this example, the clutch hub 16 is fixed to the input shaft 6 so as not to move in the axial direction, and the clutch disk 17 is made of spring steel. The clutch disk 17 is formed of a material having sufficient rigidity in the rotation direction, that is, the direction in which torque is transmitted.
9, the clutch disk 17 is in a free state in which the pressing force from the pressure plate 14 has been removed, and is positioned at the neutral position by the elastic force of the spring steel. It is separated from the plate 14 and the torque transmission is reliably released.

  On the other hand, in the clutch connected state of FIG. 10, the pressure plate 14 is pressed against the clutch disc 17 and a load is applied to the clutch disc 17, so that the clutch disc 17 is bent and contacts the flywheel 10 to achieve a good crank. The torque of the shaft 5 can be transmitted to the input shaft 6.

  As mentioned above, although embodiment of this invention was described using the Example, this invention is not limited to such an Example, In the range which does not deviate from the summary of this invention, it can implement with a various form. Of course.

It is a partially broken block diagram of a manual transmission. It is a principal part expanded sectional block diagram of the part of the clutch in FIG. 1, The upper part from a center line shows a clutch connection state, and the downward direction from a center line shows a clutch release state. FIG. 3 is an enlarged cross-sectional configuration diagram of an input shaft and a clutch hub in FIG. 2. It is a perspective block diagram which shows the structure of a circlip. It is a front view which shows the structure of the circlip of a modification. The cross-sectional block diagram of the clutch of 2nd Example is shown, A clutch connection state is shown above a center line, A clutch release state is shown below a center line. It is an expanded block diagram of the part of the input shaft and clutch hub which shows the modification of 2nd Example. It is a section lineblock diagram of the clutch of the 3rd example. It is principal part sectional block diagram of the cancellation | release state of the clutch of 4th Example. It is a principal part cross-section block diagram of the connection state of the clutch of 4th Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manual transmission 1a Case 2 Transmission mechanism 3 Operation lever 4 Clutch 5 Crankshaft 6 Input shaft 6a Annular groove 6b First cam surface 7 Release bearing 8 Lever clutch 9, 12 Bolt 10 Flywheel 13 Clutch cover 14 Pressure plate 15 Diaphragm 16 Clutch hub 16a annular groove 16b second cam surface 17 clutch disk 18 circlip 19 bolt 20 spring 21 ball 22a, 22b coil spring

Claims (7)

A clutch device that transmits and releases torque from a prime mover to an input shaft of a mechanical mechanism,
A torque input member connected to the output shaft of the prime mover;
A torque transmission member capable of transmitting the torque to the input shaft;
A pressing member that presses the torque transmitting member against the torque input member to transmit the torque to the input shaft;
Pressing release means for releasing the pressing of the torque transmission member by the pressing member;
A sticking preventing means for preventing sticking between the torque transmitting member and the torque input member when the press of the torque transmitting member is released by the press releasing means;
A clutch device comprising: The pressing member is connected to the torque input member,
The clutch device according to claim 1, wherein the sticking prevention means is means for preventing sticking between the torque transmitting member and the pressing member. The torque transmission member is disposed between the torque input member and the pressing member,
The sticking preventing means positions the torque transmitting member at a neutral position between the torque input member and the pressing member when the pressing of the torque transmitting member is released by the pressing releasing means, thereby The clutch device according to claim 1, wherein the clutch device is means for preventing sticking between the transmission member and the torque input member.   The clutch device according to claim 3, wherein the sticking prevention means is a means having an elastic member capable of positioning the torque transmission member at the neutral position. The torque transmission member has a hub portion that is spline-engaged with the input shaft,
The sticking prevention means includes a first cam surface formed on an outer peripheral surface of the input shaft, a second cam surface formed on an inner peripheral surface of the hub portion, the first cam surface, and the second cam surface. The clutch device according to claim 4, wherein the elastic member is arranged so that an elastic force can be applied thereto. The first cam surface and / or the second cam surface is formed as an annular groove,
The clutch device according to claim 5, wherein the elastic member is a ring member formed in a substantially C shape.   The clutch device according to any one of claims 1 to 6, wherein the mechanical mechanism is a manual transmission mechanism that manually switches a gear stage having different switchable gear ratios.

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