Power transmission device for vehicle

• US 10,443,657 B2
• Filed: 08/25/2016
• Issued: 10/15/2019
• Est. Priority Date: 09/07/2015
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nakawatari, Kodo, Kuwamoto, Hiroki, Ichikawa, Akitaka
• Primary Examiner(s): Setliff, Matthieu F
• Application Number:
  US15/247,241
• Publication Number:
  US 20170067512A1
• Time in Patent Office: Days
• CPC Class Codes: B60K 6/20 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/36 characterised by the transmission gearings
• CPC Class Codes: B60K 6/40 characterised by the assembly or relative disposition of components
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60Y 2300/74 Reducing shift shocks
• CPC Class Codes: F16D 1/02 for connecting two abutting shafts or the like
• CPC Class Codes: F16D 1/0835 due to the elasticity of the ring or sleeve
• CPC Class Codes: F16D 1/10 Quick-acting couplings in which the parts are connected by simply bringing them together axially
• CPC Class Codes: F16D 2001/103 the torque is transmitted via splined connections
• CPC Class Codes: F16D 2300/22 Vibration damping
• CPC Class Codes: F16H 3/727 with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path special adapted for a hybrid electric vehicle B60K6/20
• CPC Class Codes: F16H 57/0006 Vibration-damping or noise reducing means specially adapted for gearings devices for varying tension of belts, ropes or chains with damping means F16H7/0829; toothed members with construction providing vibration damping F16H55/14; reducing vibrations or noise of the gearbox casing F16H57/028; suppression of vibrations or noise of gear selectors F16H59/0208; control of hydrostatic fluid gearing preventing or reducing vibrations or noise F16H61/4183
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/904 Component specially adapted for hev

Abstract

A power transmission device includes a rotor shaft, a gear shaft, and a rattling suppression member. The rattling suppression member is provided between a first shaft end portion and the gear shaft or between a second shaft end portion and the rotor shaft. The first shaft end portion is a portion, protruding to the gear shaft side from one of a pair of first bearings, of the rotor shaft, while the second shaft end portion is a portion, protruding to the rotor shaft side from one of a pair of second bearings, of the gear shaft.

Claims

1. A power transmission device for a vehicle, the power transmission device comprising:

a rotor shaft of a motor, the rotor shaft being supported by a pair of first bearings and configured to rotate about a common axis, the rotor shaft including first spline teeth;

a gear shaft supported by a pair of second bearings and configured to rotate about the common axis, the gear shaft being formed with a reduction gear and including second spline teeth spline-fitted to the first spline teeth of the rotor shaft; and

a rattling suppression member press-fitted into a portion of the gear shaft where the rotor shaft and the gear shaft overlap each other in a radial direction and where neither the first spline teeth nor the second spline teeth are provided, the rattling suppression member provided between a gear shaft end portion and the rotor shaft, the gear shaft end portion protruding from the gear shaft and beyond a rotor shaft side of one of the pair of second bearings, the second spline teeth being disposed between the rattling suppression member and the pair of second bearings along the common axis.

2. The power transmission device according to claim 1, wherein the rattling suppression member is a metal plate bent into an annular shape, the rattling suppression member including a plurality of projections projecting radially outward and circumferentially arranged.

3. The power transmission device according to claim 2, wherein the rattling suppression member is a tolerance ring.