JP2006017166A - Clutch cover assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve strength of a support member by devising the shape of the support member of a diaphragm spring of a clutch cover assembly. <P>SOLUTION: The clutch cover assembly 8 is arranged between an engine and a transmission, and energizes a friction connection part 6 of a clutch disc assembly 4 to a flywheel 1 connected to the engine. The clutch cover assembly is provided with a circular clutch cover 9 fixed to integrally rotate with a flywheel 1, a circular pressure plate 20 disposed to integrally rotate with the clutch cover 9 to hold a friction connection part 6 of the clutch disc assembly 4 with the flywheel 1, the diaphragm spring 23 supported by the clutch cover 9 to press the pressure plate 20 to the friction connection part 6, and the circular support member 30 supporting the diaphragm spring 23 in such a manner of being elastically deformable along the axial direction with respect to the clutch cover 9. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a clutch cover assembly used in a clutch device for transmitting engine torque to a transmission side.

  There is a clutch device as means for arbitrarily transmitting and shutting off engine torque to a driven side such as a transmission. The clutch device is mounted on a flywheel provided on an engine drive shaft, and mainly includes a clutch disk assembly, a clutch cover assembly, and a release device. The clutch disc assembly includes a friction coupling portion (clutch disc) disposed close to the friction surface of the flywheel, a hub coupled to the transmission input shaft, and the friction coupling portion and the hub elastically in the rotational direction. And a damper mechanism to be connected. The clutch cover assembly is for urging the friction coupling portion of the clutch disc assembly to the friction surface of the flywheel. The clutch cover is fixed to the flywheel, and the clutch cover is rotated integrally with the clutch cover. The pressure plate is disposed in the vicinity, and a biasing member that is supported by the clutch cover and biases the pressure plate toward the friction coupling portion. The release device is a device for releasing the urging force from the clutch cover assembly to the friction coupling portion.

  When the clutch is engaged, the urging member presses the pressure plate toward the axial flywheel, and the friction coupling portion is held between the flywheel and the pressure plate. A friction force is generated on each friction surface, and the flywheel, the friction coupling portion, and the pressure plate rotate together. Thus, engine torque is transmitted from the flywheel to the transmission input shaft via the clutch disc assembly. On the other hand, at the time of clutch release, the release device operates in the axial direction, elastically deforms the urging member, and releases the load from the urging member on the pressure plate. And a pressure plate leaves | separates from a friction connection part to an axial direction, and a friction connection part leaves | separates from the friction surface of a flywheel. Thereby, torque transmission from the engine to the transmission input shaft is interrupted.

  As the aforementioned urging member, for example, a diaphragm spring is known. The diaphragm spring includes an annular annular elastic portion for pressing the pressure plate, and a plurality of lever portions extending radially inward from the annular elastic portion and arranged at regular intervals in the circumferential direction. In addition, a cutout portion in which a part is cut out at both ends in the circumferential direction of each lever portion is formed at the base of the lever portion on the annular elastic portion side. With these shapes, the entire diaphragm spring can be elastically deformed in the axial direction.

When the clutch is engaged, the pressure plate is elastically pressed toward the axial flywheel side by elastic deformation of the diaphragm spring itself. On the other hand, the tip of each lever portion is connected to a release device, and the entire diaphragm spring is elastically deformed in the axial direction by the operation of the release device in the axial direction. Therefore, at the time of release, the pressure plate is released by elastically deforming the diaphragm spring by the release device. Thus, an axial force acts on the diaphragm spring when the clutch is engaged and released. Further, since the clutch cover rotates integrally with the flywheel, the diaphragm spring needs to rotate together with the clutch cover. Therefore, the diaphragm spring needs to be supported so as to be elastically deformable in the axial direction with respect to the clutch cover and not relatively rotatable. As a member (support member) that supports the diaphragm spring with respect to the clutch cover, a stud pin and a tag are widely known (for example, refer to Patent Documents 1 and 2).
JP 2004-28330 A JP 2000-55076 A

  A plurality of stud pins are arranged in the circumferential direction of the clutch cover. The clutch device is classified into an under cover type and an over cover type depending on the axial positional relationship between the clutch cover and the diaphragm spring. The clutch device described in Patent Document 1 is an overcover type in which a diaphragm spring is disposed inside a clutch cover. On the other hand, in the under cover type, the diaphragm spring is disposed on the transmission side with respect to the clutch cover. Therefore, in the case of the under cover type, the stud pin is attached so as to protrude toward the axial transmission side with respect to the clutch cover.

  The stud pin includes a fixing part, a support part, and a head part. The fixing portion is a portion that is fixed to a hole provided in the clutch cover. The support part is a cylindrical part protruding from the fixed part toward the axial transmission side, and the notch part of the diaphragm spring is engaged with the support part. The head is a cylindrical portion having a larger outer diameter than the support provided at the end of the support.

  The diaphragm spring is fitted into the plurality of stud pins while being sandwiched between the two ring members in the axial direction. Since the ring member has a circular cross-sectional shape, the diaphragm spring and the ring member are in line contact, and are easily elastically deformed in the axial direction. Further, since the ring member on the transmission side is engaged with the head of the stud pin, it is possible to prevent the diaphragm spring from falling off in the axial direction. As a result, the diaphragm spring is supported so as to be elastically deformable in the axial direction with respect to the clutch cover and not relatively rotatable.

  When the diaphragm spring is elastically deformed in the axial direction, an axial force acts on the plurality of studs. Further, when the diaphragm spring is rotated integrally with the clutch cover, if it is elastically deformed in the axial direction, a force in the rotational direction acts on the plurality of stud pins. However, each of the plurality of stud pins merely supports the diaphragm spring independently of the clutch cover. Therefore, axial and rotational forces act on each stud pin, and sometimes these forces are concentrated on some stud pins. Therefore, depending on the use situation, a load may be applied to the fixing portion of the stud pin and the like may be damaged.

  On the other hand, a plurality of tags are arranged on the inner peripheral side of the clutch cover. The tag is formed by bending a part of the clutch cover. Further, the pressure plate has a plurality of protrusions in the circumferential direction that are pressed by the annular elastic portion of the diaphragm spring. The under cover type clutch cover has a through hole through which a protruding portion penetrates around the tag. When a load is applied to the tag, stress tends to concentrate on the bent portion of the tag. For this reason, stress concentration may cause a crack from the base of the tag to the through hole, resulting in damage to the clutch cover.

  The subject of this invention is improving the intensity | strength of a support member by devising the shape of the support member of the diaphragm spring of a clutch cover assembly.

  Another object of the present invention is to devise the shape of the support member of the diaphragm spring so as to protect the diaphragm spring and prevent damage to peripheral devices and the like.

  Another object of the present invention is to improve the strength of the clutch cover by devising the shape of the support member.

  The clutch cover assembly according to the first aspect is disposed between the engine and the transmission, and biases the friction coupling portion of the clutch disc assembly against the flywheel coupled to the engine. An annular clutch cover that is fixed to rotate integrally with the flywheel, and an annular pressure plate that is configured to rotate integrally with the clutch cover and sandwich the friction coupling portion of the clutch disk assembly with the flywheel. And a diaphragm spring that is supported by the clutch cover and presses the pressure plate toward the friction coupling portion, and an annular support member that supports the diaphragm spring so as to be elastically deformable in the axial direction with respect to the clutch cover.

  In this clutch cover assembly, a plurality of members do not independently support the diaphragm spring as in a conventional stud pin, but an annular support member integrally supports the diaphragm spring. Therefore, in this clutch cover assembly, the strength of the support member can be improved and damage to the support member can be prevented. In addition, since the strength of the support member is improved, the diaphragm spring can be reliably fixed to the clutch cover.

  A clutch cover assembly according to a second aspect of the present invention is the clutch cover assembly according to the first aspect, wherein the support member is disposed on the axial transmission side of the clutch cover, and the diaphragm spring is sandwiched between the clutch cover and the support member.

  In this clutch cover assembly, since the annular support member is disposed on the transmission side of the clutch cover in the axial direction, the diaphragm spring exposed to the transmission side of the clutch cover can be protected.

  A clutch cover assembly according to a third aspect of the present invention is the clutch cover assembly according to the first or second aspect, wherein the clutch cover has a plurality of holes arranged in the circumferential direction, and the support member is provided at a position corresponding to the hole. A claw portion engaging with the portion.

  In this clutch cover assembly, since the claw portion of the support member is engaged with the hole portion of the clutch cover, the support member can be reliably fixed to the clutch cover. As a result, in this clutch cover assembly, the diaphragm spring can be more reliably supported with respect to the clutch cover. Moreover, in this clutch cover assembly, since the clutch cover has a hole, stress concentration can be reduced as compared with the conventional tag, and the strength of the clutch cover can be improved.

  A clutch cover assembly according to a fourth aspect is the clutch cover assembly according to the third aspect, wherein the support member has a plate-like annular portion, the claw portion extends from the inner peripheral side of the annular portion to the axial flywheel side, and the hole portion is formed. A first claw portion that penetrates, and a second claw portion that is bent in a radial direction from an axial flywheel side end portion of the first claw portion and engages an axial flywheel side surface of the clutch cover. Yes.

  In this clutch cover assembly, since the claw portion has the first claw portion and the second claw portion, the support member can be more securely fixed to the clutch cover. As a result, the diaphragm spring can be more reliably supported with respect to the clutch cover.

  A clutch cover assembly according to a fifth aspect of the present invention is the clutch cover assembly according to the third or fourth aspect, wherein an annular elastic portion in which the diaphragm spring biases the pressure plate, and a plurality of lever portions extending radially inward from the annular elastic portion. And a notch portion that is disposed between the adjacent lever portions and engages with the claw portion.

  In this clutch cover assembly, since the claw portion extending from the annular portion of the support member is engaged with the notch portion, the diaphragm spring can be more securely fixed to the clutch cover.

  A clutch cover assembly according to a sixth aspect of the present invention is the clutch cover assembly according to the fourth or fifth aspect, wherein the annular portion has a curved shape protruding to the axial flywheel side over the entire circumference.

  In this clutch cover assembly, since the annular portion has a curved shape, the strength of the annular portion can be improved, and the strength of the entire support member can be further improved.

  According to a seventh aspect of the present invention, the clutch cover assembly according to the fourth or fifth aspect has a tapered shape in which the annular portion is separated from the clutch cover in the axial direction as it goes radially outward.

  In this clutch cover assembly, since the annular portion has a tapered shape, the strength of the annular portion can be improved, and the strength of the entire support member can be further improved.

  A clutch cover assembly according to an eighth aspect of the present invention is the clutch cover assembly according to any one of the fourth to seventh aspects, wherein the support member is disposed between the adjacent claw portions, and the plurality of protrusions extend radially inward from the annular portion. Has a part.

  In this clutch cover assembly, since the support member has the protruding portion, the diaphragm spring exposed to the transmission side of the clutch cover can be protected over a wider range. Conversely, when the diaphragm spring, particularly the lever portion, is damaged, it is possible to prevent debris and the like from scattering to the surroundings, and to prevent damage to peripheral devices and the like.

  A clutch cover assembly according to a ninth aspect of the present invention is the clutch cover assembly according to any one of the first to eighth aspects, wherein an annular ring member is further sandwiched between the diaphragm spring and the support member and between the diaphragm spring and the clutch cover. ing.

  In this clutch cover assembly, since the ring member is provided, the diaphragm spring can be supported by line contact, and the diaphragm spring can be supported to the clutch cover so as to be elastically deformable in the axial direction. Moreover, in this clutch cover assembly, since the diaphragm spring is supported by the annular portion and the ring member, the diaphragm spring can be supported uniformly in the circumferential direction. Therefore, in this clutch cover assembly, the unevenness of the axial position of the diaphragm spring is reduced, and the unevenness of the axial position of each lever portion can also be reduced.

  If it is the clutch cover assembly concerning this invention, the intensity | strength of a support member can be improved by devising the shape of the support member of a diaphragm spring. In the clutch cover assembly according to the present invention, the shape of the support member for the diaphragm spring can be devised to protect the diaphragm spring and prevent damage to peripheral devices and the like. Furthermore, if it is a clutch cover assembly concerning this invention, the intensity | strength of a clutch cover can be improved by devising the shape of a support member.

Embodiments of the present invention will be described below with reference to the drawings.
1. Structure of Clutch Device As an embodiment of the present invention, a clutch device in which a push type is combined with an under cover type will be described. FIG. 1 is a plan view of a clutch device according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view taken along line AA. OO is the rotation center line of the clutch device.

  The clutch device is for transmitting and shutting off the engine torque to the transmission input shaft 3, and includes a flywheel 1, a clutch disk assembly 4, a clutch cover assembly 8, and a release device (not shown). Composed.

  The flywheel 1 is a disk-like member provided on an engine crankshaft (not shown), and is fixed so as not to rotate relative to the crankshaft.

  The clutch disk assembly 4 is for realizing a clutch function and a damper function, and includes, for example, a friction coupling portion 6, a hub 5, and a damper mechanism 7. The frictional connection portion 6 is annularly arranged on the outer peripheral portion of the clutch disc assembly 4 and is sandwiched between the pressure plate 20 (described later) of the flywheel 1 and the clutch cover assembly 8, thereby increasing the engine torque. Transmission to the transmission input shaft 3 side. The hub 5 is spline-engaged with the transmission input shaft 3 and connects the transmission input shaft 3 and the damper mechanism 7. The damper mechanism 7 elastically connects the friction coupling portion 6 and the hub 5 in the rotational direction, and absorbs shock and vibration during clutch engagement.

  The clutch cover assembly 8 is for urging the friction coupling portion 6 of the clutch disk assembly 4 toward the flywheel 1, and includes a clutch cover 9, a pressure plate 20, and a diaphragm spring 23. . The clutch cover 9 is an annular member fixed so as not to rotate relative to the flywheel 1. The pressure plate 20 is annularly arranged between the clutch cover 9 and the friction coupling portion 6 and is fixed by a strap plate 19 so as not to rotate relative to the clutch cover 9 and to be movable in the axial direction. Yes. The diaphragm spring 23 is for pressing the pressure plate 20 in the axial direction. In this embodiment, the diaphragm spring 23 is disposed on the axial transmission side of the clutch cover 9.

  The pressure plate 20 includes a pressing portion 21 and a protrusion 22. The pressing portion 21 is an annular member for biasing the friction coupling portion 6 to the flywheel 1. The protrusions 22 are portions that receive a pressing force from an annular elastic portion 24 (described later) of the diaphragm spring 23, and a plurality of the protrusions 22 are arranged in the circumferential direction on the axial clutch cover 9 side of the pressing portion 21. In the case of the under cover type, since the protrusion 22 penetrates the clutch cover 9 toward the axial transmission side, the clutch cover 9 has a through hole 16 through which the protrusion 22 passes. The pressure plate 20 is fixed by a strap plate 19 so that it can rotate integrally with the clutch cover 9 and move in the axial direction.

  The diaphragm spring 23 includes an annular elastic portion 24 and a lever portion 25. The annular elastic portion 24 is for pressing the protrusion 22 of the pressure plate 20 and is formed in an annular shape on the outer peripheral side of the diaphragm spring 23. The lever portions 25 are a plurality of tapered members extending inward in the radial direction from the annular elastic portion 24 and are arranged at regular intervals in the circumferential direction. In addition, a notch portion 26 in which a part of the lever portion 25 is notched is disposed between the adjacent lever portions 25 around the connecting portion between the lever portion 25 and the annular elastic portion 24. The cutout portion 26 is a portion that is supported by a support member 30 (described later) of the clutch cover 9.

  The release device is for operating the clutch connection and release, and is arranged around the transmission input shaft 3 so as to be movable in the axial direction. Since this embodiment is a push type, the release device moves to the axial flywheel 1 side and presses the tips of the plurality of lever portions 25 to perform the clutch release operation.

2. Support Member Structure The support member 30 includes an annular portion 31, a claw portion 32, and a protruding portion 33. The annular part 31 constitutes a main part of the support member 30 and is an annular and plate-like member. In the present embodiment, as is apparent from the longitudinal sectional view, the annular portion 31 has a curved shape that protrudes toward the axial flywheel 1 over the entire circumference.

  The claw portions 32 are a plurality of protrusions provided on the inner peripheral side of the annular portion 31 and extending toward the axial flywheel 1, and are engaged with the clutch cover 9. The clutch cover 9 has a plurality of hole portions 40 arranged in the circumferential direction, and the claw portions 32 are provided at positions corresponding to the hole portions 40. The claw portion 32 further includes a first claw portion 32a and a second claw portion 32b.

  The first claw portion 32 a is a plate-like portion that extends from the inner peripheral side of the annular portion 31 to the axial flywheel 1 side and penetrates the hole 40 of the clutch cover 9. The first claw portion 32 a engages with the notch portion 26 of the diaphragm spring 23. Specifically, the radially outward surface of the first claw portion 32a and the radially outward surface of the notch 26 are engaged. An annular ring member 18 is sandwiched between the diaphragm spring 23 and the support member 30 and between the diaphragm spring 23 and the clutch cover 9. Since the diaphragm spring 23 is in line contact with the ring member 18, it can be elastically deformed in the axial direction with respect to the clutch cover 9. The 2nd nail | claw part 32b is a plate-shaped part bent in the radial direction outward from the edge part by the side of the axial direction flywheel 1 of the 1st nail | claw part 32a, and the surface by the side of the axial direction flywheel 1 of the clutch cover 9 Is engaged.

  The protruding portion 33 is a plurality of plate-like portions that are arranged between the adjacent claw portions 32 and extend radially inward from the annular portion 31. In order to prevent interference with the lever portion 25 of the diaphragm spring 23, the plurality of projecting portions 33 each have a shape slightly bent toward the axial transmission side in the middle of the radial position. Moreover, the protrusion 33 has a semicircular tip. The annular portion 31, the claw portion 32, and the protruding portion 33 described above are integral plate-like members, and are formed by bending.

  Here, an assembly procedure of the clutch cover 9, the diaphragm spring 23, the ring member 18, and the support member 30 will be described. Prior to assembly, the support member 30 is in a state where the second claw portion 32b of the claw portion 32 is not formed. The diaphragm spring 23 and the two ring members 18 are fitted into the first claw portions 32a, respectively. And the 2nd nail | claw part 32b is inserted by the hole 40 of the clutch cover 9 in the state. With the support member 30 and the clutch cover 9 held in the axial direction, the tips of the plurality of first claw portions 32a are bent radially outward to form the second claw portions 32b. Thereby, the diaphragm spring 23 is fixed to the clutch cover 9 by the support member 30 so as not to be relatively movable in the axial direction and the rotational direction.

3. Operation of Clutch Device The operation of the clutch device according to the present invention will be described.

(1) At the time of clutch connection Since the pressure plate 20 is pressed in the axial direction by the annular elastic portion 24 of the diaphragm spring 23 at the time of clutch connection, the friction connection portion 6 is narrow between the pressure plate 20 and the flywheel 1. Be held. The friction coupling portion 6, that is, the clutch disc assembly 4 rotates integrally with the flywheel 1 and the clutch cover assembly 8 by the frictional force generated on each friction surface. As a result, engine torque is transmitted to the transmission input shaft 3.

  The diaphragm spring 23 presses the protrusion 22 of the pressure plate 20 toward the axial flywheel 1 side. Therefore, the reaction force of the pressing force acts on the annular portion 31 of the support member 30 via the ring member 18. The reaction force is transmitted to the claw portion 32 via the annular portion 31. That is, this reaction force acts as a tensile force in the axial direction on the plurality of claws 32 engaged with the clutch cover 9.

  However, since the claw portion 32 is formed by bending a plate-like member, the allowable amount of elastic deformation in the axial direction is larger than that of a cylindrical stud pin. Further, the diameter of the engaging portion with the clutch cover is not reduced like the stud pin. Further, the plurality of claw portions 32 are formed as an integral member by the annular portion 31. Therefore, since the strength of the support member 30 is improved as a whole, the support member 30 is not easily damaged even if an axial tensile force acts on the claw portion 32.

  The clutch cover 9 rotates integrally with the flywheel 1. The diaphragm spring 23 is supported by the support member 30 so as not to rotate relative to the clutch cover 9. Therefore, a rotational force acts on the support member 30. That is, a rotational force is applied to the claw portion 32 engaged with the diaphragm spring 23.

  However, since the plurality of claw portions 32 are formed as an integral member by the annular portion 31, for example, even if a force in the rotation direction acts on some claw portions 32, the force is distributed to the plurality of claw portions 32. . Therefore, since the strength of the support member 30 is improved by dispersing the force acting on the claw portion 32, the support member 30 is not easily damaged even if a force in the rotation direction acts on the claw portion 32.

  The clutch cover 9 is formed with a hole 40 with which the claw portion 32 is engaged. Since the conventional tag is formed by bending a part of the clutch cover, stress tends to concentrate on the bent part when the clutch is connected, and the clutch cover cracks from the base of the tag to the through hole provided in the periphery. There is a fear. However, since the hole 40 of the clutch cover 9 is not bent, the stress concentration can be reduced as compared with the conventional tag. Therefore, in the clutch cover assembly 8, the strength of the clutch cover 9 can be improved.

(2) At the time of clutch release At the time of clutch release, in order to release the pressure of the pressure plate 20, the end of the lever portion 25 of the diaphragm spring 23 is pushed toward the axial flywheel by the release device. Then, the diaphragm spring 23 is elastically deformed by the lever portion 25 toward the axial flywheel and the annular elastic portion 24 toward the axial transmission. As a result, the annular elastic portion 24 does not press the protrusion 22 of the pressure plate 20 toward the axial flywheel 1, so that the pressure plate 20 moves to the axial transmission side due to the elastic force of the strap plate 19, and the friction coupling portion 6 is no longer held. As a result, torque transmission from the flywheel 1 to the transmission input shaft 3 is interrupted.

  Due to the clutch release operation, the diaphragm spring 23 is elastically deformed in the axial direction. At this time, it is considered that a force acts on the two ring members 18 holding the diaphragm spring 23 in the opposite axial direction. Accordingly, a tensile force in the axial direction acts on the claw portion 32. However, since the strength of the support member 30 is improved as a whole as in the clutch engagement state, the support member 30 is hardly damaged.

  On the other hand, a force in the rotational direction acts on the support member 30 in the same manner as when the clutch is engaged. Since the plurality of claw portions 32 are formed as an integral member by the annular portion 31, the force is distributed to the plurality of claw portions 32 even if a force in the rotation direction acts on the claw portion 32. Therefore, since the strength of the support member 30 is improved by dispersing the force acting on the claw portion 32, the support member 30 is not easily damaged even if a force in the rotation direction acts on the claw portion 32.

  The clutch cover 9 is formed with a hole 40 with which the claw portion 32 is engaged. Since the conventional tag is formed by bending a part of the clutch cover, stress is likely to concentrate on the bent part at the time of release as in the case of clutch engagement. However, since the hole 40 of the clutch cover 9 is not bent, the stress concentration can be reduced as compared with the conventional tag. Therefore, in the clutch cover assembly 8, the strength of the clutch cover 9 can be improved.

(3) When the diaphragm spring is broken For example, it is conceivable that the lever portion 25 of the diaphragm spring 23 is broken due to fatigue and the lever portion 25 falls off by repeating elastic deformation in the axial direction. Since the dropped lever portion 25 is rotated by the clutch cover 9 and the diaphragm spring 23, the lever portion 25 may scatter to the periphery and damage peripheral devices and the like. However, in this clutch cover assembly 8, since the support member 30 has the protruding portion 33, the damaged lever portion 25 can be prevented from scattering, and damage to peripheral devices and the like can be prevented. it can.

4). Operational Effects The operational effects of the clutch cover assembly 8 according to the present invention are summarized below.

(1) Prevention of breakage of support member In this clutch cover assembly 8, a plurality of members do not support the diaphragm spring 23 independently as in a conventional stud pin, but an annular support member 30 is integrated. Thus, the diaphragm spring 23 is supported. Further, the annular portion 31 of the support member 30 has a curved shape. Thereby, in this clutch cover assembly 8, the strength of the support member 30 can be improved, and damage to the support member 30 can be prevented.

  In the clutch cover assembly 8, the claw portion 32 of the support member 30 is engaged with the hole portion 40 of the clutch cover. The claw portion 32 has a first claw portion 32 a and a second claw portion 32 b and is engaged with the notch portion 26 of the diaphragm spring 23. Thereby, in the clutch cover assembly 8, the support member 30 can be more reliably fixed to the clutch cover 9.

(2) Protection of the diaphragm spring and prevention of damage to peripheral devices, etc. In this clutch cover assembly 8, since the annular support member 30 is disposed on the axial transmission side of the clutch cover 9, the clutch cover 9 moves toward the transmission side. The exposed diaphragm spring 23 can be protected. Further, in this clutch cover assembly 8, since the support member 30 has the protrusion 32, the diaphragm spring 23 exposed to the transmission side of the clutch cover 9 can be protected over a wider range. On the contrary, when the diaphragm spring 23, particularly the lever portion 25 is damaged, it is possible to prevent the fragments and the like from being scattered around, and the peripheral devices and the like can be prevented from being damaged.

(3) Improving the strength of the clutch cover In this clutch cover assembly 8, since the clutch cover 9 has the hole 40, the stress concentration can be reduced compared to the conventional tag, and the strength of the clutch cover 9 can be reduced. Can be improved.

(4) Others In this clutch cover assembly 8, since the support member 30 supports the diaphragm spring 23 by the annular portion 31 and the ring member 18, the diaphragm spring 23 can be supported uniformly in the circumferential direction. Therefore, in this clutch cover assembly, unevenness in the axial position of the diaphragm spring 23 around the support portion is reduced, and unevenness in the axial position of each lever portion 25 can also be reduced.

(5) Summary As described above, in the clutch cover assembly 8, the strength of the support member 30 is improved to surely support the diaphragm spring 23 with respect to the clutch cover 9, and the support member 30 protects the diaphragm spring 23. It is possible to prevent damage to peripheral devices. In the clutch cover assembly 8, the strength of the clutch cover 9 can be improved.

5. Other Embodiments The present invention is not limited to the above-described embodiments, and various modifications or corrections can be made without departing from the scope of the present invention. Other embodiments will be described below.

(1) Shape of the annular portion In the above-described embodiment, the annular portion 31 is described in a curved shape, but may be a tapered shape. FIG. 3 shows a longitudinal sectional view corresponding to the section AA in FIG. The annular portion 31 has a tapered shape that moves away from the clutch cover 9 in the axial direction as it goes outward in the radial direction. Thereby, since the annular portion 31 has rigidity like a cone spring, the strength of the annular portion 31 is improved and the strength of the support member 30 is also improved. As a result, it is possible to obtain the same effect as when the annular portion 31 has a curved shape.

The top view of the clutch apparatus as one Embodiment of this invention. The longitudinal cross-sectional view of the clutch apparatus as one Embodiment of this invention. The longitudinal cross-sectional view of the clutch apparatus as other embodiment of this invention.

Explanation of symbols

OO Rotation center line 1 Flywheel 3 Transmission input shaft 4 Clutch disc assembly 6 Friction connecting part 8 Clutch cover assembly 9 Clutch cover
18 ring member 19 strap plate 20 pressure plate 23 diaphragm spring 24 annular elastic part 25 lever part 26 notch part 30 support member 31 annular part 32 claw part 32a first claw part 32b second claw part 33 projecting part 40 hole part

Claims (9)

A clutch cover assembly disposed between an engine and a transmission for biasing a friction coupling portion of a clutch disk assembly against a flywheel coupled to the engine;
An annular clutch cover fixed to rotate integrally with the flywheel;
An annular pressure plate arranged to rotate integrally with the clutch cover, and arranged to sandwich the friction coupling portion of the clutch disc assembly with the flywheel;
A diaphragm spring supported by the clutch cover and pressing the pressure plate toward the friction coupling portion;
An annular support member that supports the diaphragm spring so as to be elastically deformable in the axial direction with respect to the clutch cover;
A clutch cover assembly comprising: The support member is disposed on the transmission side in the axial direction of the clutch cover,
The diaphragm spring is sandwiched between the clutch cover and the support member.
The clutch cover assembly according to claim 1. The clutch cover has a plurality of holes arranged in the circumferential direction,
The support member is provided at a position corresponding to the hole, and has a plurality of claws that engage with the hole.
The clutch cover assembly according to claim 1 or 2. The support member has a plate-like annular portion,
The nail portion is
A first claw portion extending from the inner peripheral side of the annular portion toward the flywheel side in the axial direction and penetrating the hole portion;
A second claw portion that is bent in a radial direction from an end portion on the flywheel side in the axial direction of the first claw portion and engages with a surface on the flywheel side in the axial direction of the clutch cover;
The clutch cover assembly according to claim 3, comprising: The diaphragm spring is disposed between an annular elastic portion that urges the pressure plate, a plurality of lever portions extending radially inward from the annular elastic portion, and the adjacent lever portions, and the claw Having a cutout portion with which the portion engages,
The clutch cover assembly according to claim 3 or 4. The annular portion has a curved shape raised to the flywheel side in the axial direction over the entire circumference.
The clutch cover assembly according to claim 4 or 5. The annular portion has a tapered shape that moves away from the clutch cover in the axial direction as it goes radially outward.
The clutch cover assembly according to claim 4 or 5. The support member has a plurality of protrusions that are disposed between the adjacent claw portions and extend radially inward from the annular portion.
The clutch cover assembly according to any one of claims 4 to 7. An annular ring member is further sandwiched between the diaphragm spring and the support member and between the diaphragm spring and the clutch cover.
The clutch cover assembly according to any one of claims 1 to 8.

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