Exedy Corporation

Kabushiki Kaisha Daikin Seisakusho

Yanmar Co., Ltd.

Daikin Clutch Corporation

Aisin Seiki Kabushiki Kaisha

Yanmar Holdings Co., Ltd.

Hiroshi Uehara

Norihisa Uenohara

Hiroyoshi Tsuruta

Yoshiyuki Hagihara

Masahiro Maeda

Tamio Nagano

Hideyuki Imanaka

Yoshinari Yoshimura

Yoshitaka Kitamura

Saburo Nakanishi

Hiroshi Mizukami

Takeshi Senoue

Shinichi Okada

Hirotaka Fukushima

Hiroshi Takeuchi

Kozo Yamamoto

Masataka Mitsuda

Takashi Harada

Naoki Tomiyama

Yuki Kawahara

Yasuyuki Hashimoto

Koji Kajitani

Masaru Ebata

Masakazu Kamiya

Shunji Hamaoka

Yoshinori Fukui

Kazuhiro Koshi

Masahiko Aoki

Yasuhiko Fujita

Shusuke Okada

Tatsuyuki Aoki

Tomoki Hada

Masato Kitazaki

Satoshi Isoda

Yoshinoru Fukuda

Hiroto Koizumi

Michimoto Masaki

Osamu Kawatate

Masato Nakai

Kazuhisa Ito

In a method of assembling a damper device, a first support portion of a first rotor and a first accommodation portion of a second rotor are overlapped to eliminate an axial offset between them. A first elastic member is placed in the first support portion and the first accommodation portion. A second support portion of the first rotor and a second accommodation portion of the second rotor are overlapped to eliminate an axial offset between them by simultaneously compressing the first elastic member and rotating the second rotor relative to the first rotor to a first-side in a rotational direction. A second elastic member is placed in the second support portion and the second accommodation portion. Simultaneously, the second elastic member is compressed and the second rotor is rotated relative to the first rotor to a second-side in the rotational direction by angle corresponding to the offset between the first support portion and the first accommodation portion.

Damper device and method of assembling same

A damper device includes a torque limiter unit, a damper unit, and a positioning structure. The torque limiter unit includes a damper cover fixed to a surface of a flywheel on a first side of the flywheel in an axial direction. The damper unit is disposed such that an outer peripheral end thereof is located on a second side of an inner peripheral end of the damper cover in the axial direction. The damper unit transmits mechanical power together with the flywheel therebetween. The positioning structure radially sets the damper unit in place with respect to the torque limiter unit by making an outer peripheral surface of a core plate of a friction disc contactable with an inner surface of the damper cover of the torque limiter unit. The damper device is intended to inhibit displacement in radial position of a damper unit with respect to a torque limiter unit.

Damper device

A damper device includes a damper unit and a torque limiter unit. The damper unit includes a first input plate, a second input plate, a fastening portion fastening the first and second input plates, an output plate, and an elastic member elastically connecting the output plate and the first and second input plates. The torque limiter unit includes a first side plate, a second side plate, a friction plate, and a first friction material disposed between the friction plate and the first side plate. The first input plate includes an outer peripheral end disposed on a first side of an inner peripheral end of the first side plate in an axial direction. The first input plate has an outer diameter greater than an inner diameter of the first side plate. The fastening portion is disposed on the first side of the first side plate in the axial direction.

A damper device, disposed between an engine and a drive unit, includes an input rotor, an output rotor, an elastic coupling part, and a hysteresis torque generating mechanism. The hysteresis torque generating mechanism generates a hysteresis torque together with the input rotor or the output rotor therebetween. The damper device is in a neutral condition when a torque is not transmitted from both the engine and the drive unit, in a first torsional condition when the torque is transmitted from the engine, and in a second torsional condition when the torque is transmitted from the drive unit. The hysteresis torque generating mechanism is configured not to generate a hysteresis torque when the damper device is in the first torsional condition, and not to generate the hysteresis torque in a first range of torsion angle less than a first angle when the damper device is in the second torsional condition.

A damper device includes a first rotor, a second rotor, and an elastic member. The first rotor includes a contact surface. The contact surface faces a circumferential direction and extends in a radial direction. The second rotor is disposed to be rotatable relative to the first rotor. The second rotor includes a stopper surface extending in the radial direction. The stopper surface is opposed to the contact surface at an interval in the circumferential direction. The elastic member elastically couples the first rotor and the second rotor.

A power transmission device includes an inertia ring, a plate, a plurality of first bolts, a torque transmission member, and a plurality of second bolts. The inertia ring has an annular shape. The inertia ring includes a plurality of through holes. The plurality of through holes are disposed at intervals in a circumferential direction. The plate is disposed on a first side with respect to the inertia ring in an axial direction. The plurality of first bolts are screwed into the plurality of through holes from the first side to fasten the plate to the inertia ring. The torque transmission member is disposed on a second side with respect to the inertia ring in the axial direction. The plurality of second bolts are screwed into the plurality of through holes from the second side to fasten the torque transmission member to the inertia ring.

Power transmission device

A torque limiter includes a friction mechanism, a pressure plate, a first side plate, an urging member, and a second side plate. The friction mechanism includes a first friction member and a second friction member. The pressure plate includes a first contact surface and a plurality of first drainage grooves. The first contact surface is a surface that makes contact with the first friction member. The first drainage grooves radially extend. The second side plate includes a second contact surface that makes contact with the second friction member. The second side plate is disposed on a second side with respect to the second friction member in an axial direction. The second side plate is attached to the first side plate to be unitarily rotated therewith.

Torque limiter

A damper device includes a damper unit and a torque limiter unit. The damper unit includes first and second plates each including a plurality of window portions, a hub flange including a plurality of window holes, and a stopper mechanism. The first plate includes an engaging portion and a fixing portion fixed to the second plate. The engaging portion and the fixing portion are disposed radially outside the plurality of window portions. The hub flange includes a protrusion disposed circumferentially between and radially outside adjacent two of the plurality of window holes. The stopper mechanism is configured to be actuated by contact of the protrusion with the engaging portion. A fixation member, by which the first plate and the torque limiter unit are fixed, is disposed circumferentially between adjacent two of the plurality of window portions as seen in a direction along a rotational axis.

A damper device includes a damper unit and a torque limiter unit. The damper unit includes an output plate, an elastic member, first and second input plates. The torque limiter unit includes a pressure plate, first and second side plates. The first side plate has an inner diameter equal to an outer diameter of the output plate. The second side plate has an inner diameter equal to an outer diameter of the first input plate. The pressure plate has an inner diameter equal to an outer diameter of the second input plate. An inner-peripheral surface of the first side plate is not opposed to an outer-peripheral surface of the output plate. An inner-peripheral surface of the second side plate is not opposed to an outer-peripheral surface of the first input plate. An inner-peripheral surface of the pressure plate is not opposed to an outer-peripheral surface of the second input plate.

A damper device includes a first rotor, a second rotor, an elastic coupling part having first and second elastic members, and a hysteresis generating mechanism. The hysteresis generating mechanism includes a friction member, and generates a hysteresis torque. The friction member does not make frictional contact with the first and second rotors in a first torsion angular range where the torsion is caused between the first and second rotors by a first torsion angle from a neutral condition, makes frictional contact with the first or second rotor in a second torsion angular range exceeding the first torsion angle so as to generate the hysteresis torque, and does not make frictional contact with the first and second rotors in a predetermined torsion angular range within the second torsion angular range. In the neutral condition, the friction member is set in a neutral position by actuation of the elastic coupling part.

A damper device includes a first rotor, a second rotor, an elastic coupling part elastically coupling the first and second rotors in a rotational direction, and a hysteresis generating mechanism. The hysteresis generating mechanism generates a hysteresis torque and includes a friction member. The friction member is configured to make frictional contact with the first or second rotor. The friction member does not make frictional contact with the first and second rotors in a first torsion angular range where torsion is caused from a neutral condition to a first side and a second side in the rotational direction. The friction member makes frictional contact with the first or second rotor so as to generate a hysteresis torque in a second torsion angular range exceeding the first torsion angular range. The friction member is set in a neutral position by actuation of the elastic coupling part in the neutral condition.

A damper device includes a first rotor, a second rotor, and an elastic coupling part elastically coupling the first and second rotors in a rotational direction. The elastic coupling part includes first and second elastic members that are each initially disposed in a compressed state in a neutral condition without relative rotation between the first rotor and the second rotor. The first elastic member is transitioned from the compressed state to a free state and then further compressed when torsion of the first rotor with respect to the second rotor is caused from the neutral condition to a first side in the rotational direction. The second elastic member is transitioned from the compressed state to the free state and then further compressed when the torsion of the first rotor with respect to the second rotor is caused from the neutral condition to a second side in the rotational direction.

A damper device includes first and second rotors, and an elastic coupling part elastically coupling the two rotors. The elastic coupling part includes first and second elastic members initially disposed in a compressed state in a neutral condition without relative rotation between the two rotors. The first elastic member is transitioned from the compressed state to a free state and then further compressed when torsion of the first rotor with respect to the second rotor is caused from the neutral condition to a first side. The second elastic member is transitioned from the compressed state to the free state and then further compressed when the torsion of the first rotor with respect to the second rotor is caused from the neutral condition to a second side. Each of the first and second elastic members is transitioned from a one-side contact state to a both-side contact state when actuated in compressed.

A torque limiter embedded damper device includes a torque limiter unit and a damper unit. The damper unit includes a first rotor, a second rotor, and a stopper mechanism. The second rotor includes a flange axially opposed to the first rotor. The stopper mechanism restricts an angle of relative rotation between the first rotor and the second rotor to a predetermined angular range. The stopper mechanism includes a cutout and a stop pin. The cutout is provided in the flange of the second rotor. The stop pin is fixed to the first rotor. The torque limiter unit includes a friction plate having an annular shape. The annular friction plate is fixed at an inner peripheral part thereof to an outer peripheral part of first rotor or the second rotor by a fixation member. The fixation member is fastened in a state of penetrating the cutout of the flange.

Growing community of inventors

Hirakata, Japan

Hiroshi Uehara