Vehicular fluid power transmitting device

Patent metadata

Field	Value
Publication number	US-9695797-B2
Application number	US-201214348104-A
Country	US
Kind code	B2
Filing date	Sep 28, 2012
Priority date	Sep 29, 2011
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A vehicular fluid power transmitting device includes a pump impeller, a turbine runner, a damper device, a set member, and a centering member. The pump impeller has a pump shell to which torque from a drive source is input. The damper device has a damper input member and a damper output member. The damper input member is connected to an output shaft of the drive source. The damper output member is connected to the pump shell. The set member is fixed to the pump shell, and is connected to the damper output member. Also, the centering member is provided protruding toward the pump shell from the output shaft of the drive source, and is fitted together with the damper input member.

First claim

The invention claimed is:

1. A vehicular fluid power transmitting device comprising:
a pump impeller that has a plurality of pump blades and a pump shell to which torque from a drive source is input, the plurality of pump blades being provided inside of the pump shell;
a turbine runner that has a plurality of turbine blades and a hub portion, is supported by a shaft end portion of an output shaft of the vehicular fluid power transmitting device, and is rotated by receiving operating fluid pushed out by the pump blades, the plurality of the turbine blades being provided in positions opposite the pump blades, and the hub portion supporting the turbine blades;
a damper device that is provided between the drive source and the pump shell in an axial direction of the output shaft of the vehicular fluid power transmitting device, suppresses pulsation of torque from the drive source, and transmits the torque of which the pulsation is suppressed from the drive source to the pump shell, the damper device including a damper input member, an elastic member, and a damper output member, the damper input member being connected to an output shaft of the drive source and configured to transmit torque to the damper output member via the elastic member, the elastic member being housed inside the damper input member, and the damper output member being connected to the pump shell;
a set member that is fixed to the pump shell, and to which the damper output member is connected;
a centering member that is fixed to a shaft end of the output shaft of the drive source by a bolt, protrudes toward the pump shell from the output shaft of the drive source, and is fitted with the damper input member;
a drive plate that is fixed to the shaft end of the output shaft of the drive source, and is connected to the damper input member; and
a bearing assembly via which the damper input member is relatively rotatably supported by the set member,
wherein: the output shaft of the drive source is a crankshaft of an engine; and the centering member is fixed to a shaft end of the crankshaft, and protrudes toward a side away from the engine in the axial direction.

2. The vehicular fluid power transmitting device according to claim 1 , wherein:
the damper output member is housed in the damper input member, and has an output radially outer portion and an output radially inner portion;
torque from the damper input member is transmitted via the elastic member to the output radially outer portion, and the output radially inner portion is fixed to an end surface, on a drive source side, of the set member;
the damper input member has an input radially outer portion and a cylindrical boss portion that is curved so as to extend, in the axial direction, to a position of a radially inner side of the output radially inner portion;
the elastic member and the output radially outer portion are housed within the input radially outer portion;
the bearing assembly is fitted in between a radially outer peripheral surface of the cylindrical boss portion and a radially inner peripheral surface of the set member; and
a radially outer peripheral surface of the centering member is fitted to a radially inner peripheral surface of the cylindrical boss portion.

3. The vehicular fluid power transmitting device according to claim 2 , further comprising
a plurality of set bolts that screws into a plurality of female threaded holes formed in the axial direction in the set member,
wherein: the output radially inner portion is fastened to the set member by the set bolts; and
through-holes are formed in opposite portions of the damper input member, the opposite portions being opposite the set bolts.

4. The vehicular fluid power transmitting device according to claim 2 , wherein the bearing assembly is fitted to a radially inner peripheral surface of the output radially inner portion.

Assignees

• Yamashita Toshiya
• Itazu Naoki
• Nakashima Yoichi
• Hori Takashi
• Ebata Masaru
• Doman Yasunori
• Toyota Motor Co Ltd
• Aisin Aw Co
• Exedy Corp

Inventors

• Yamashita Toshiya
• Itazu Naoki
• Nakashima Yoichi
• Hori Takashi
• Ebata Masaru
• Doman Yasunori

Classifications

• F16H2045/0205

  two chamber system, i.e. without a separated, closed chamber specially adapted for actuating a lock-up clutch · CPC title

• F16H2045/0221

  with damping means · CPC title

• F16H2045/0252

  having a damper arranged on input side of the lock-up clutch · CPC title

• F16H41/24 Primary

  Details · CPC title

• F16H2045/0294

  Single disk type lock-up clutch, i.e. using a single disc engaged between friction members · CPC title