JP2006029415A - Clutch cover assembly and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the rigidity of a clutch cover as a whole and further to improve the strength of the circumference of a supporting member by devising the shape of the supporting member of a clutch cover assembly. <P>SOLUTION: This clutch cover assembly 8 is mounted between an engine and a transmission, and energizes a frictional connecting part 6 of a clutch disc assembly 4 to a fly wheel 1 connected with the engine. This clutch cover assembly comprises the clutch cover 9, a pressure plate 20 and a diaphragm spring 23. The supporting member 30 of the clutch cover 9 has a first supporting part axially projecting from a clutch cover main body part 9a, a second supporting part 32 radially projecting from an axial tip of the first supporting part 31, and a pair of reinforcement parts 33 mounted on both ends in the circumferential direction, of the base on a clutch cover main part part 9a side, of the first supporting part 31. <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, and a manufacturing method thereof.

  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. 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 diaphragm spring elastically presses the pressure plate toward the axial flywheel by its own elastic deformation. 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 tag formed by bending a part of the clutch cover is widely known (see, for example, Patent Document 1).
JP 2000-55076 A.

  A plurality of tags 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 on the axial flywheel side of the clutch cover. On the other hand, in the under cover type, a diaphragm spring is disposed on the side of the clutch cover in the axial direction. Therefore, in the case of the under cover type, the tag is formed so as to protrude toward the axial transmission side of the clutch cover.

  A plurality of conventional clutch covers are arranged on the inner peripheral portion of the clutch cover as in Patent Document 1. Further, the position of the tag is made to correspond to the position of the notch portion of the diaphragm spring. For this reason, the inner diameter of the inner peripheral portion of the clutch cover is increased, and the rigidity of the clutch cover is decreased. When the rigidity of the clutch cover is lowered, the deformation of the clutch cover is increased during the clutch connection and release operation. Therefore, a disconnection failure of the clutch device occurs.

  In order to eliminate such problems, it is necessary to increase the rigidity of the clutch cover. In order to increase the rigidity of the clutch cover, there is one in which the inner peripheral portion of the clutch cover is extended radially inward. FIG. 16 is a plan view of a conventional clutch cover assembly. As shown in FIG. 16, the clutch cover 109 of the clutch cover assembly 108 has a plurality of tags 130 and window holes 135 formed in a portion extending radially inward. The tag 130 is formed by bending a tongue-like portion formed by a notch. FIG. 17 shows the shape of a conventional notch, and FIG. 18 shows the shape of a window hole after tag formation. As shown in FIG. 17, the notch 140 before the tag 130 is formed has a U shape that is slightly larger than the tongue. Since a load in the axial direction and the rotational direction acts on the tag 130, stress tends to concentrate around the base of the tag 130. Therefore, the notch 140 has a shape in which the periphery of the base of the tag 130 is notched. In addition, as shown in FIG. 18, at the same time when the tag 130 is formed, a window hole portion 135 including the notch portion 140 is formed. Since the clutch cover 109 has a plurality of window holes 135 formed therein, the rigidity of the clutch cover 109 is reduced as compared with a state in which the window holes 135 are not provided. Accordingly, the clutch cover 109 is greatly deformed during the clutch engagement and release operation, and a clutch device disconnection failure or the like occurs.

  Further, as shown in FIG. 16, since the protrusion 122 of the pressure plate 120 penetrates to the axial transmission side of the clutch cover 109, a plurality of through holes 116 are provided in the circumferential direction on the radially outer side of the tag 130. Yes. Therefore, if stress concentrates around the base of the tag 130, the clutch cover 109 may crack from the base of the tag 130 to the through hole 116.

An object of the present invention is to improve the rigidity of the entire clutch cover and improve the strength around the support member by devising the shape of the support member in the clutch cover assembly.
Another object of the present invention is to manufacture a clutch cover assembly including a highly rigid clutch cover in which the strength of a support member is improved by devising a method of manufacturing the clutch cover assembly.

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. The clutch cover includes an annular clutch cover main body and a plurality of support members that are arranged in the circumferential direction of the clutch cover main body and support the diaphragm spring. The support member includes a first support portion protruding in an axial direction from the clutch cover main body portion, a second support portion protruding in a radial direction from an axial tip of the first support portion, and a clutch cover main body side of the first support portion. It has a pair of reinforcement part provided in the circumferential direction both ends of the root of.
In this clutch cover assembly, since the support member has a pair of reinforcing portions, the strength of the base of the first support portion is improved, and the strength of the support member is also improved. As a result, breakage of the support member can be prevented.

According to a second aspect of the present invention, the clutch cover according to the first aspect further includes a window hole portion in which the clutch cover is disposed adjacent to one of the supporting members in the radial direction.
Since this clutch cover assembly has a window hole portion adjacent to the support member, the support member can be integrally formed by bending a part of the clutch cover, and is easy to process.

According to a third aspect of the present invention, in the clutch cover assembly according to the second aspect, the base and the pair of reinforcing portions are formed by bending the end portions of the window holes.
In this clutch cover assembly, since the base and the pair of reinforcing portions are formed by curving the end portions of the window hole, the strength around the base of the support member is further improved, and the strength of the support member is further improved. . As a result, breakage of the support member can be prevented.

  A clutch cover assembly according to a fourth aspect of the present invention is the clutch cover assembly according to the second or third aspect, wherein the first and second support members are formed by bending a part of the clutch cover main body portion, and the window hole portion is the first support portion. And a first window hole portion corresponding to the second support portion, and a pair of second window hole portions provided at both circumferential ends of the first window hole portion.

In order to prevent stress concentration around the base of the support member, the shape of the conventional window hole is rounded off around the base of the support member. As a result, the window hole is a notch that is slightly larger than the support member. However, in this clutch cover assembly, since the first window hole portion has a shape corresponding to the support member, the window hole portion can be made smaller than the conventional one. As a result, the clutch cover assembly can increase the rigidity of the clutch cover.
Moreover, in this clutch cover assembly, since the window hole part has a pair of 2nd window hole part, stress concentration around the base of a support member can be reduced, making a window hole part small.

According to a fifth aspect of the present invention, in the clutch cover assembly according to any one of the first to fourth aspects, the support member has a raised portion in which the base and the periphery of the pair of reinforcing portions are further raised in the axial direction.
In this clutch cover assembly, since the support member has the raised portion, the reinforcing portion can be bent to further extend in the axial direction. As a result, the strength around the base of the support member can be further improved. Moreover, since this clutch cover assembly has a raised portion, a portion bent at a steep angle is not formed, and stress concentration at the bent portion can be reduced.

A clutch cover assembly according to a sixth aspect of the present invention is the clutch cover assembly according to any one of the first to fifth aspects, wherein the support member protrudes toward the axial transmission side with respect to the clutch cover main body.
In this clutch cover assembly, since the support member protrudes toward the axial transmission side, the clutch cover assembly can be employed in an under cover type clutch cover assembly.

According to a seventh aspect of the present invention, in the clutch cover assembly according to any of the first to sixth aspects, the second support portion protrudes outward in the radial direction.
In this clutch cover assembly, since the second support portion is bent outward in the radial direction, the diaphragm spring can be more reliably supported with respect to the clutch cover assembly.

  The manufacturing method of the clutch cover assembly according to claim 8 is arranged between the engine and the transmission, and the friction connecting portion of the clutch disk assembly is connected to the flywheel connected to the engine by a pressure plate and a diaphragm spring. The present invention relates to a clutch cover assembly for biasing. A first step of processing a clutch cover main body constituting a main portion of an annular clutch cover fixed so as to rotate integrally with the flywheel, and a plurality of U-shapes arranged circumferentially with respect to the clutch cover main body A second step of processing the first cutout portion having a shape, a third step of processing a pair of second cutout portions corresponding to a pair of end portions of the U-shaped first cutout portion, and a first cutout portion A fourth step of bending the formed tongue-like portion in the axial direction to process the support member protruding in the axial direction from the clutch cover main body, a fifth step of assembling the clutch cover, the pressure plate, and the diaphragm spring, and the diaphragm And a sixth step of bending the tip of the support member in the radial direction to support the spring so as to be elastically deformable in the axial direction with respect to the clutch cover.

  Since this manufacturing method includes the third step of processing the U-shaped first cutout portion and the pair of second cutout portions, and the fourth step of processing the support member, the clutch having a small cutout portion. A cover can be manufactured. In addition, in this manufacturing method, the portion around the base of the support member can be largely cut out by the second cutout portion while reducing the cutout portion as compared with the conventional method. As a result, in this manufacturing method, it is possible to manufacture a clutch cover assembly including a clutch cover having higher rigidity than in the past, and to provide a clutch cover including a clutch cover that can reduce stress concentration around the base of the support member. Assemblies can be manufactured.

According to a ninth aspect of the present invention, in the clutch cover assembly manufacturing method according to the eighth aspect, the clutch cover has a pair of reinforcing portions provided at both ends in the circumferential direction around the base of the support member. The fourth step includes a step of forming the reinforcing portion in which the end portion of the second notch is curved by processing the periphery of the base at the same time.
In this manufacturing method, since the fourth step includes the step of forming the reinforcing portion, it is possible to manufacture the clutch cover assembly with improved strength around the base of the support member.

The manufacturing method of the clutch cover assembly according to claim 10 further includes the step of processing a raised portion in which the periphery of the base and the pair of reinforcing portions is raised in the axial direction in the fourth step in claim 9. .
In this manufacturing method, since the fourth step includes a step of processing the raised portion, it is possible to manufacture a clutch cover assembly in which the strength around the base of the support member is further improved.

With the clutch cover assembly according to the present invention, by devising the shape of the support member in the clutch cover assembly, the rigidity of the clutch cover can be increased and the strength of the support member can be improved.
Moreover, if it is the manufacturing method of the clutch cover assembly which concerns on this invention, the rigidity of a clutch cover can be improved. Further, according to this manufacturing method, it is possible to manufacture a clutch cover assembly in which the rigidity of the clutch cover is improved and the strength of the support member is improved.

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, an under cover type that employs a push 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 the line AA of FIG. 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 load 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 diaphragm spring is disposed on the axial transmission side, the protrusion 22 needs to penetrate the clutch cover 9. Therefore, the clutch cover 9 has a through hole 16 at a position corresponding to the protrusion 22.

  The diaphragm spring 23 includes an annular elastic part 24, a lever part 25, and a notch part 26. 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 portions extending radially inward from the annular elastic portion 24 and are arranged at regular intervals in the circumferential direction. The notch portion 26 is disposed around the connecting portion between the lever portion 25 and the annular elastic portion 24 and between the adjacent lever portions 25 and is supported by a support member 30 (described later) of the clutch cover 9. It is.

  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, when the release device moves to the axial flywheel 1 side and presses the tips of the plurality of lever portions 25, the diaphragm spring 23 is elastically deformed in the axial direction to perform the clutch release operation. Do.

2. Structure of Clutch Cover (1) Structure of Clutch Cover The clutch cover 9 is mainly composed of a clutch cover main body portion 9a and a support member 30. The clutch cover main body 9 a is an annular plate-like member that constitutes the main part of the clutch cover 9. The support member 30 is for supporting the diaphragm spring 23 so as to be elastically deformable in the axial direction and non-rotatable relative to the clutch cover 9, and a plurality of support members 30 are arranged in the circumferential direction with respect to the clutch cover main body 9a. Yes. Further, the clutch cover main body 9 a has a window hole 35 and a through hole 16. The window hole portion 35 is a notch-like portion disposed adjacent to the inner side in the radial direction of each support member 30. The through-hole 16 is a notch-shaped portion for allowing a plurality of protrusions 22 of the pressure plate 20 arranged in the circumferential direction to penetrate the clutch cover main body 9a. In the present embodiment, the through hole 16 is arranged on the outer peripheral side of the window hole portion 35.

(2) Structure of Support Member The structure of the support member 30 will be described in further detail. FIG. 3 is a longitudinal sectional view around the support member, and FIG. 4 is a plan view around the support member. The support member 30 includes a first support part 31, a second support part 32, a reinforcing part 33, and a raised part 34. As shown in FIG. 3, the first support portion 31 is a portion that protrudes from the clutch cover main body portion 9 a toward the axial transmission side. The first support portion 31 is a portion with which the notch 26 of the diaphragm spring 23 is engaged, and supports the diaphragm spring 23 in the circumferential direction and the radial direction with respect to the clutch cover 9.

  The second support portion 32 is a portion formed by bending outward in the radial direction from the axial end portion of the first support portion 31. The second support portion 32 is a portion with which the annular elastic portion 24 of the diaphragm spring 23 is engaged. The second support portion 32 supports the diaphragm spring 23 in the axial direction. Specifically, the diaphragm spring 23 is assembled to the support member 30 while being sandwiched between the two ring members 18 as shown in FIG. Therefore, the support member 30 can support the diaphragm spring 23 by the first and second support portions 31 and 32 so that the diaphragm spring 23 can be elastically deformed in the axial direction and cannot rotate relative to the clutch cover 9.

  As shown in FIG. 4, the reinforcing portion 33 is provided around the root 31 a of the first support portion 31 on the clutch cover main body portion 9 a side and at both ends in the circumferential direction of the first support portion 31. The reinforcing portion 33 is a portion that protrudes toward the axial transmission side in the same manner as the first support portion 31. The base 31a and the reinforcing part 33 of the first support part 31 are formed by bending the end part of the window hole part 35 on the first support part 31 in the radial direction in the axial direction. Unlike the first support portion 31, the reinforcing portion 33 only bends the end portion of the window hole portion 35. Accordingly, the reinforcing portion 33 protrudes in the axial direction in a slightly twisted state so as to connect the circumferential end portion of the window hole portion 35 from the base 31 a of the first support portion 31. Thereby, compared with the past, the part bent by the steep angle around the base 31a of the 1st support part 31 reduces. Accordingly, since stress generated around the base 31a of the first support portion 31 is dispersed, stress concentration can be reduced, and damage around the support member 30 can be prevented.

  The raised portion 34 is a portion where the base 31a of the first support portion 31 and the periphery of the pair of reinforcing portions 33 are further raised toward the axial transmission side. By providing the raised portion 34, the portion bent at a steep angle around the base 31a and the reinforcing portion 33 of the first support portion 31 is reduced. Therefore, since stress generated around the base 31a of the first support portion 31 is dispersed, stress concentration can be further reduced, and damage to the periphery of the support member 30 can be prevented.

(3) Structure of window hole part The structure of the window hole part 35 is demonstrated still in detail. As shown in FIG. 4, the window hole 35 includes a first window hole 35 a and a second window hole 35 b. The first window hole portion 35a is a notch-shaped portion formed when the first and second support portions 31 and 32 are bent. Specifically, when the first and second support portions 31 and 32 are formed, the first and second cutout portions are formed on the clutch cover main body portion 9a by laser processing or the like. FIG. 5 shows a plan view of the first and second notches. The first cutout 40 is an elongated cutout having a U shape as shown in FIG. As shown in FIG. 5, the second cutout portion 41 is formed by cutting out the periphery of the end portion of the first cutout portion 40 toward the outer side in the circumferential direction. The second notch 41 has a rounded corner in consideration of stress concentration. A tongue-like portion 30 a corresponding to the first and second support portions 31 and 32 is formed by the first and second cutout portions 40 and 41. The first and second support portions 31 and 32 are formed by bending the tongue-shaped portion 30a, and the window hole portion 35 including the first and second cutout portions 40 and 41 is formed.

  In this case, since the first cutout portion 40 is formed to be elongated, the range of useless cutouts is reduced as compared with the conventional cutout portion 140 (FIG. 17). Therefore, the range of the window hole portion 35 is also smaller than that of the conventional window hole portion 135 (FIG. 18). In addition, since the second window hole portion 35b is provided at both ends in the circumferential direction of the first window hole portion 35a, the clutch cover 9 can reduce stress concentration around the root 31a of the first support portion 31. it can. Further, the clutch cover 9 can easily form the reinforcing portion 33 by the second window hole portion 35b. Accordingly, the clutch cover 9 can increase the strength around the base 31a of the first support portion 31 while reducing the window hole portion 35, thereby increasing the rigidity of the clutch cover 9 and improving the strength of the support member 30. be able to.

3. Manufacturing Method A manufacturing method of the clutch cover assembly 8 according to the present embodiment will be described. FIG. 6 shows a manufacturing process of the clutch cover assembly 8.

(1) 1st process In 1st process S1, the clutch cover main-body part 9a which comprises the principal part of the clutch cover 9 is processed. The clutch cover main body 9a is formed from, for example, an annular plate member by pressing or the like.

(2) Second Step In the second step S2, as shown in FIG. 5, the plurality of first cutout portions arranged in the circumferential direction are processed with respect to the clutch cover main body portion 9a. The first cutout portion 40 has a U shape as shown in FIG. 5, and the width of the U shape is processed to be thinner than the conventional one. The first cutout 40 is processed by, for example, laser processing.

(3) 3rd process In 3rd process S3, as shown in FIG. 5, a pair of 2nd notch part corresponding to a pair of edge part of a 1st notch part is processed. As shown in FIG. 5, the second cutout portion 41 is formed by cutting out the periphery of the end portion of the first cutout portion 40 having a U shape toward the outer side in the circumferential direction. The second notch 41 has a rounded corner in consideration of stress concentration. The processing of the second notch 41 is performed by laser processing or the like, similar to the first notch 40. A tongue-like portion 30 a corresponding to the first and second support portions 31 and 32 is formed by the first and second cutout portions 40 and 41.

(4) Fourth Step In the fourth step S4, the support member 30 is processed. Specifically, in the fourth step S4, the tongue portion 30a formed by the first cutout portion 40 is bent in the axial direction, and the first support portion 31 protruding from the clutch cover main body portion 9a in the axial direction is processed. I do. At that time, the two working dies are pressed from both sides in the axial direction around the first and second cutout portions 40 and 41.

  Here, the processing mold will be described. The two processing molds are composed of first and second processing molds 50 and 51. 7 is a plan view of the first machining die, FIG. 8 is a sectional view taken along the line BB of the first machining die, FIG. 9 is a sectional view taken along the line CC of the first machining die, and FIG. 10 is a DD of the first machining die. FIG. 11 is a plan view of the second machining die, FIG. 12 is an elevation view of the second machining die, and FIG. 13 is an EE sectional view of the second machining die. The first processing die 50 is a die that presses the periphery of the first and second cutout portions 40 and 41 on the side from which the support member 30 protrudes. The 2nd process type | mold 51 is a type | mold pressed on the opposite side of the 1st process type | mold 50 with respect to the clutch cover main-body part 9a. As shown in FIG. 7, the first processing die 50 has a hole 50a penetrating in the axial direction. And the 1st process type | mold 50 is formed with the curved recessed part 50b around the hole 50a in order to process the above-mentioned reinforcement part 33 and the protruding part 34. As shown in FIG. Moreover, the 2nd process type | mold 51 is formed with the insertion part 51a inserted by the hole 50a, and the convex part 51b corresponding to the recessed part 50b.

  In the fourth step S4, the first processing die 50 described above is set according to the first and second cutout portions 40 and 41. FIG. 14 shows a state where the first and second machining dies 50 and 51 are set. The hole 50a of the first machining die 50 is set below the tongue 30a (transmission side). In this state, the tip of the convex portion 51a of the second working die 51 is pressed against the upper side (flywheel side) of the tongue-shaped portion 30a. And the 2nd process type | mold 51 is pressed to the 1st process type | mold 50 side so that the insertion part 51a may be inserted by the hole 50a. As a result, the first support portion 31 protruding in the axial direction is formed. Moreover, after the insertion part 51a is inserted in the hole 50a, if the 2nd process type | mold 51 is further pressed to the 1st process type | mold 50, the convex part 51b will be inserted in the recessed part 50b. As a result, the base 31a of the first support portion 31 and the periphery thereof are bent toward the first processing die 50, and the periphery further protrudes toward the first processing die 50. Thereby, the reinforcement part 33 and the protruding part 34 are formed.

(5) Fifth Step In the fifth step S5, the clutch cover 9, the pressure plate 20, and the diaphragm spring 23 are assembled. The pressure plate 20 is fixed to the clutch cover 9 by the strap plate 19 so as not to be relatively rotatable and relatively movable in the axial direction. The diaphragm spring 23 is assembled together with the two ring members 18 to the support member 30 of the clutch cover 9, specifically, the first support portion 31 processed in the fourth step S4. More specifically, the cutout portion 26 of the diaphragm spring 23 is inserted into the first support portion 31.

(6) 6th process In the 6th process S6, the above-mentioned 2nd support part 32 is processed. Specifically, the tip of the first support portion 31 of the clutch cover 9 to which the diaphragm spring 23 is assembled in the fifth step S5 is bent outward in the radial direction. Thus, the diaphragm spring 23 is supported so as to be elastically deformable in the axial direction with respect to the clutch cover 9 and not relatively rotatable.

4). Operational Effects The operational effects of the clutch cover assembly 8 and the manufacturing method thereof according to the present invention are summarized below.
(1) Effects of clutch cover assembly In this clutch cover assembly 8, since the support member 30 has a pair of reinforcing portions 33, the strength of the base 31a on the side of the clutch cover main body 9a of the first support portion 31 is increased. And the strength of the support member 30 is improved. As a result, damage to the support member 30 can be prevented. Further, in this clutch cover assembly 8, the base 31 a of the first support portion 31 and the pair of reinforcing portions 33 are formed by curving the end portions of the window hole portions 35, and thus the first support portion of the support member 30. The strength around the base 31a of 31 is further improved, and the strength of the support member 30 is further improved. As a result, damage to the support member 30 can be prevented.

  In this clutch cover assembly 8, since the window hole portion 35 has a pair of second window hole portions 35b, the stress concentration around the base 31a of the support member 30 is reduced while making the window hole portion 35 smaller than in the prior art. Can be reduced. Furthermore, since the clutch cover assembly 8 has the second window hole portion 35b, the reinforcing portion 33 of the support member 30 can be easily bent in the axial direction. As a result, the strength of the support member 30 can be further improved.

  In this clutch cover assembly 8, since the support member 30 has the raised portion 34, the reinforcing portion 33 can be bent so as to extend further in the axial direction. As a result, the strength around the base 31a of the support member 30 can be further improved. Further, since the clutch cover assembly 8 has the raised portion 34, a portion bent at a steep angle is not formed, and stress concentration on the bent portion can be reduced.

  In the clutch cover assembly 8, the first window hole portion 35 a has a shape corresponding to the support member 30, so that the window hole portion 35 can be made smaller than the conventional one. As a result, in the clutch cover assembly 8, the rigidity of the clutch cover 9 by the window hole portion 35 can be increased.

(2) Effects of Manufacturing Method of Clutch Cover Assembly In this manufacturing method, the third step S3 for processing the U-shaped first cutout portion 40 and the pair of second cutout portions 41 and the support member 30 are processed. Since the fourth step S4 is included, the clutch cover 9 having a small cut-out portion can be manufactured. Further, in this manufacturing method, the periphery of the base 31a of the support member 30 can be largely cut out by the second cutout portion 41 while reducing the cutout portion as compared with the conventional method. As a result, in this manufacturing method, the stress concentration around the base 31a of the support member 30 can be reduced, and the clutch cover assembly 8 including the highly rigid clutch cover 9 can be manufactured.

  In this manufacturing method, since the fourth step S4 includes a step of forming the reinforcing portion 33, it is possible to manufacture the clutch cover assembly 8 in which the strength around the base 31a of the support member 30 is improved. Further, in this manufacturing method, since the fourth step S4 includes a step of processing the raised portion 34, the clutch cover assembly 8 in which the strength around the root 31a of the support member 30 is further improved can be manufactured.

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 of the present invention will be described below.

(1) Shape of the first and second cutouts In the above-described embodiment, the first and second cutouts 40 and 41 are shaped as shown in FIG. 5, but for example, as shown in FIG. The two notches 41 may slightly enter the tongue 30a side. In this case, since the range of the second notch 41 is increased, the corner of the second notch 41 can be further rounded. Thereby, the stress concentration around the base 31a of the first support portion 31 can be further relaxed.

(2) Processing Steps for First and Second Notches In the above-described embodiment, the first and second notches 40 and 41 are performed in the second and third steps as shown in FIG. You may perform before the 1st process which processes the cover main-body part 9a. Therefore, the first step and the second and third steps may be interchanged.

The top view of the clutch apparatus as one Embodiment of this invention. AA sectional drawing. The longitudinal cross-sectional view of a support member periphery. The top view of a support member periphery. The top view of a 1st and 2nd notch part. Manufacturing process of clutch cover assembly. The top view of a 1st process type | mold. BB sectional drawing of the 1st processing type. CC sectional drawing of a 1st process type | mold. DD sectional drawing of a 1st process type | mold. The top view of the 2nd processing type. The elevation view of the 2nd processing type. EE sectional drawing of the 2nd processing type. The set state figure of the 1st and 2nd processing type. The top view of the 1st and 2nd notch part as other embodiment of this invention. The top view of the conventional clutch cover assembly. Conventional notch shape. The shape of the window hole after tag formation.

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
16 Through-hole 18 Ring member 19 Strap plate 20 Pressure plate 22 Protruding part 23 Diaphragm spring 24 Annular elastic part 25 Lever part 26 Notch part 30 Support member 30a Tongue part 31 First support part 31a Base 32 Second support part 33 Reinforcement part 34 raised portion 35 window hole portion 40 first cutout portion 41 second cutout portion 50 first working die 51 second working die

Claims (10)

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 part;
The clutch cover includes an annular clutch cover main body, and a plurality of support members arranged in a circumferential direction of the clutch cover main body, and supporting the diaphragm spring,
The support member includes a first support portion protruding in an axial direction from the clutch cover main body portion, a second support portion protruding in a radial direction from an axial tip of the first support portion, and the first support portion. Having a pair of reinforcing portions provided at both ends in the circumferential direction of the base on the clutch cover main body side,
Clutch cover assembly. The clutch cover further includes a window hole portion disposed adjacent to one of the support member in the radial direction,
The clutch cover assembly according to claim 1. The root and the pair of reinforcing portions are formed by curving an end portion of the window hole portion,
The clutch cover assembly according to claim 2. The first and second support parts are formed by bending a part of the clutch cover main body part,
The window hole portion includes a first window hole portion corresponding to the first and second support portions, and a pair of second window hole portions provided at both circumferential ends of the first window hole portion,
The clutch cover assembly according to claim 2 or 3. The support member has a raised portion in which the periphery of the root and the pair of reinforcing portions is further raised in the axial direction.
The clutch cover assembly according to any one of claims 1 to 4. The support member protrudes toward the transmission side in the axial direction with respect to the clutch cover body.
The clutch cover assembly according to any one of claims 1 to 5. The second support part protrudes radially outward;
The clutch cover assembly according to any one of claims 1 to 6. A clutch cover assembly manufacturing method for biasing a friction coupling portion of a clutch disk assembly to a flywheel disposed between an engine and a transmission and coupled to the engine by a pressure plate and a diaphragm spring. And
A first step of processing a clutch cover main body constituting a main part of an annular clutch cover fixed so as to rotate integrally with the flywheel;
A second step of processing a plurality of U-shaped first notches arranged in the circumferential direction with respect to the clutch cover main body;
A third step of processing a pair of second cutout portions corresponding to the pair of end portions of the U-shaped first cutout portion;
A fourth step of processing the support member protruding in the axial direction from the clutch cover main body by bending a U-shaped portion formed in the first notch in the axial direction;
A fifth step of assembling the clutch cover, the pressure plate, and the diaphragm spring;
A sixth step of bending the distal end of the support member in a radial direction to support the diaphragm spring so as to be elastically deformable in the axial direction with respect to the clutch cover;
A method of manufacturing a clutch cover assembly including: The clutch cover has a pair of reinforcing portions provided at both circumferential ends around the base of the support member,
The fourth step includes the step of forming the reinforcing portion in which the end portion of the hole portion is curved by simultaneously processing the periphery of the base.
The clutch cover assembly according to claim 8. 10. The method for manufacturing a clutch cover assembly according to claim 9, wherein the fourth step further includes a step of processing a raised portion in which the periphery of the root and the pair of reinforcing portions is raised in the axial direction.

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