Exedy Corporation

Hideyuki Imanaka

Hiroshi Uehara

Yasuyuki Hashimoto

Tamio Nagano

Yoshitaka Kitamura

Saburo Nakanishi

Hiroshi Teramae

Ikuo Murata

Hisashi Honjo

Hiroshi Mizukami

Hiroshi Kobayashi

Masaaki Asada

Toshiya Kosumi

Masanobu Tanaka

Hiroyuki Matsubara

A damper disc assembly having multiple embodiments. In one embodiment, spring seats are arranged at opposite ends of coil springs disposed between a power input rotary member and a power output rotary member. Each spring seat has a contacting surface with mutually perpendicular slanting portions. In another embodiment, a modified spring seat determines a phase or orientation of the power input rotary member with respect to the power output rotary member. In a third embodiment, a friction element is formed of resin and includes a friction adjusting element. The body portion of the friction element is made of resin and includes a friction generating surface that contacts a side surface of the sub-plate. The fiction adjusting element is provided in the friction generating surface of the body portion by molding and modifies the friction coefficient thereof. In a fourth embodiment, the friction element has a coating applied to a friction surface which modifies the friction coefficient.

Friction element for a damper disc having a friction adjusting element

A pair of spring seats (,) are used at opposite ends of a small coil spring (,) disposed between a power input rotary member and a power output rotary member. Each spring seat (,) includes a receiving side surface for receiving the spring and a contacting surface (,). Each contacting surface (,) is formed with four slanting surfaces that slant inward toward a central portion of the contacting surface. The intersections of the four slanting surfaces of each spring seat define two intersecting V-shaped grooves (,). The power input rotary member and the power output rotary member contact respective portions of one of the V-shaped grooves (,) of each spring seat. Engagement between the rotary members and the engaged V-shaped grooves restricts movement of the spring seats (,).

Damper disc assembly having non-rotatable spring seats

A twin-clutch device is provided that overcomes problems relating to a releasing property, a start property and a phase shift between clutch disks. The device includes first and second clutch disk assemblies 5 and 6, an intermediate plate 7, a clutch cover assembly 9, strap plates 16 and control mechanism. The intermediate plate 7 is disposed between the two clutch disk assemblies. The clutch cover assembly 9 has a pressure plate 17 and a diaphragm spring 18. The strap plates 16 bias the pressure plate 17 away from the flywheel 2. The control unit operates in a clutch switching operation to move the intermediate plate 7 at a slower speed than the pressure plate 17 upon start of movement of the pressure plate 17, and then to move both the intermediate plate 7 and the pressure plate 17 in synchronization with each other after the pressure plate 17 moves a distance corresponding to a predetermined stroke.

Twin-clutch device

A clutch disk assembly includes two pieces of friction facings, cushioning plates 12, clutch plate 3, retaining plate 4, a plurality of connecting pins 11, hub and rivets 17. The cushioning plates 12 are disposed side by side in a circular direction between two pieces of friction facings. Each of the cushioning plates 12 includes a cushioning part 16 disposed between two pieces of friction facings, and an installation part 15 in which two holes 15a are formed apart each other in a circular direction. The connecting pins 11 fixedly couple the outer circumferential portions of plates 3 and 4 to each other. The rivets 17 are inserted in the holes 15a to fix the cushioning plates 12 to the outer circumferential edge of the clutch plate 3. The locations of the connecting pins 11 in a circular direction are located between two adjacent holes 15a of the cushioning plates 12 in a circular direction. The locations of the connecting pins 11 reduce the stresses in the installation parts 15 of the cushioning plates 12. At least a part of each of the connecting pins 11 is located farther outwardly in a radial direction than the most inner circumferential edge of the installation parts 15 of each of the cushioning plates 12.

Clutch disk assembly

In one embodiment, a pair of spring seats (32) are intended for use at opposite ends of a small coil spring (6) disposed between a power input rotary member and a power output rotary member. Each spring seat (32) includes a receiving side surface for receiving a respective end of the small coil spring and a contacting surface (36). The contacting surface (36) is formed with slanting portions (37, 38) with V-shaped cross section, mutually perpendicular to one another. The power input rotary member and the power output rotary member contact a respective slanting section of one of the slanting portions (37, 38). In another embodiment, a spring seat (40) is provided with a first support portion (43) and a second support portion (44) such that the orientation of the spring seat (40) determines a phase or orientation of the power input rotary member with respect to the power output rotary member. In a third embodiment, a friction element is formed of resin and includes a friction adjusting element (20). The body portion (15a) of the friction element is made of resin and includes a friction generating surface contactable to the side surface of a sub-plate (5). The fiction adjusting element (20) is provided in the friction generating surface of the body portion (15a) by molding and is intended for modifying the friction coefficient thereof.

Damper disc assembly having spring seats for changing a phase

In one embodiment, a pair of spring seats (32) are used at opposite ends of a small coil spring (6) disposed between a power input rotary member and a power output rotary member. Each spring seat (32) includes a receiving side surface for receiving the small coil spring and a contacting surface (36). The contacting surface (36) is formed with slanting portions with V-shaped cross sections (37, 38) mutually perpendicular. The power input rotary member and the power output rotary member each contact a respective slanting section of one of the slanting portions. In another embodiment, a spring seat (40) is provided with a first support portion (43) and a second support portion (44) such that the orientation of the spring seat (40) determines a phase or orientation of the power input rotary member with respect to the power output rotary member. In a third embodiment, a friction element is formed of resin and includes a friction adjusting element (20). The friction adjusting element (20) is provided in the friction generating surface of the body portion (15a) of the friction element by molding and is intended for modifying the friction coefficient thereof. In a fourth embodiment, a first friction element (14) includes a friction generating surface having a coefficient of friction which differs from that of a friction generating surface of a second friction element (15).

Damper disc assembly having friction elements each having a different

A clutch disc assembly is provided with a support structure and friction generating members that provide generally constant friction generation, even when misalignment occurs between adjacent members. The clutch disc assembly 1 includes a hub 2, a fourth friction washer 19, a clutch plate 3 and a second coil spring 7. The fourth friction washer 19 is fixed to the hub 2 and has a tapered surface 19a. The clutch plate 3 has an inner peripheral edge tapered portion 3c which is abutted against the tapered surface 19a and disposed on the outer periphery of the hub 2. The second coil spring 7 couples the hub 2 to the clutch plate 3 in a circumferential direction.

Clutch disc assembly

A torsion damper for a clutch disc is disposed in window holes provided in power input and output rotating elements of the clutch disc, for elastically coupling the power input and output rotating elements in a direction of their rotation. The torsion damper includes a pair of seat elements 11 and a rubber element 12 therebetween. In one embodiment, the rubber element 12 is positioned between both the seat elements 11 and is capable of expanding and contracting. The rubber element includes a projection 20 and a through-hole 16 is provided in each of the seat elements 11.

Resilient element having an elastic portion and seat portions for use in

A clutch cover assembly (1) has release load characteristics which have been smoothed out or flattened by using a secondary conical spring (8) in combination with a diaphragm spring (7). To reduce the overall number of parts in the assembly 1, the pressure plate (6) includes axially extending pins (10) which extend through holes formed in the diaphragm spring (7). The pins (10) are also engaged with a portion of the conical spring (8).

Clutch cover assembly having a diaphragm spring and a secondary biasing

A first frictional resistance generating mechanism 10 includes a first friction washer 51, a second friction washer 52 and a conical spring 53. The first friction washer 51 includes a high friction coefficient member 71 in contact with a side surface of a flange 4b and a core plate 72 fixed thereto, and has second apertures 51a through which stop pins 41 fixed to the first and second side plates 5 and 6 extend. The second friction washer 52 has a low friction coefficient member 73 in contact with the core plate 72, and is relatively nonrotatably coupled to the stop pins 41. The conical spring 53 biases the first and second friction washers 51 and 52 toward the flange 4b.

Damper disk assembly having multiple stage dampening characteristics

A clutch disc assembly (1) is provided with lubrication members (11a, 11b) to reduce the wear of the parts which contact the large coil springs (7) disposed within the clutch disc assembly (1). Plates (4) and (5) and a separated flange (3) are configured to rotate relative to each other. Raised portions (4a) and (5a) of the plates (4) and (5) correspond to a window (3c). Each of the large coil springs (7) extends in a circumferential direction with respect to the clutch disc assembly (1). Each large coil spring is confined within a corresponding the window (3c) of the separated flange (3) and further between the raised portions (4a) and (5a) of the plates (4) and (5). Lubricant-impregnated members (11a, 11b) are provided on a portion of respective sides of the separated flange (3), and are contactable with the large spring coil (7). In one alternate embodiment, a portion of plates (105) and (106) is provided with a plurality of minute apertures (140). The plates (105) and (106) are then provided with a surface hardened layer (130) to reduce wear due to friction.

Damper disc assembly having a plate formed with lubricating members for

To smooth the response characteristics at a transition point between a first stage and second stage of friction mechanism in a damper disc assembly, the damper disc assembly includes several friction generating mechanisms. One friction generating mechanism 9 includes, a flange 2b, a retaining plate 4, a friction washer 18 and a conical spring 19. A flange 2b has projections 2f projecting toward the retaining plate 4 and extending through a predetermined angle in a circumferential direction. The friction washer 18 is formed with two distinct friction surfaces, disc portion 18a and high frictional coefficient member 18c. The disc portion 18a has a low frictional coefficient and is in contact projections 2f formed on a hub 2 when there is no torsion applied to the damper disc. The high frictional coefficient member 18c is formed at spaced apart intervals on the friction washer 18 and are engagable with the projections 2f in response to torsional vibrations being applied to the damper disc. The second friction washer 18 is coupled with the retaining plate 4 in the circumferential direction. The second conical spring 19 is used to bias the second friction washer 18 toward the flange 2b.

Friction generating mechanism for a damper disc assembly

A clutch disc assembly (1) is provided a lubrication member (11) to suppress the wear of parts which contact any of the coil springs (7) disposed within the clutch disc assembly (1). Plates (4) and (5) and a separated flange (3) are configured to rotate relative to each other. Raised portions (4a) and (5a) of the plates (4) and (5) correspond to a window (3c). Each of the large coil springs (7) is confined within the window (3c), the raised portions (4a) and (5a) of the plates (4) and (5) and the separated flange (3) in the circumferential direction. A lubricant-impregnated member (11) is provided in the plates (4) and (5), and is contactable with the large spring coil (7).

Damper disc assembly

A torsion damper for a clutch disc is disposed in window holes provided in power input and output rotating elements of the clutch disc, for elastically coupling the power input and output rotating elements in a direction of their rotation. The torsion damper includes a pair of seat elements (11) and a rubber element (12) therebetween. In one embodiment, the rubber element (12) is positioned between both the seat elements (11) and is capable of expanding and contracting. The rubber element includes a projection (20) and a through-hole (16) is provided in each of the seat elements (11).

Growing community of inventors

Moriguchi, Japan

Hideyuki Imanaka