POWER TRANSMISSION DEVICE FOR VEHICLE

• US 20170227109A1
• Filed: 02/01/2017
• Published: 08/10/2017
• Est. Priority Date: 02/09/2016
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: FUJII, Kota, SUZUKI, Haruhisa, TATENO, Hiroyuki, OKUDA, Koichi, TABATA, Atsushi
• Granted Patent: US 10,190,669 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 2006/381 characterized by driveline brakes shift brakes in transmission B60K6/54
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/442 Series-parallel switching type
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2306/09 Reducing noise
• CPC Class Codes: B60Y 2400/73 Planetary gearings
• CPC Class Codes: F16D 1/0835 due to the elasticity of the ring or sleeve
• CPC Class Codes: F16H 2200/0043 the gear ratios comprising four forward speeds
• CPC Class Codes: F16H 2200/201 with three sets of orbital gears
• CPC Class Codes: F16H 2200/2043 with five engaging means
• CPC Class Codes: F16H 2200/2066 using one freewheel mechanism
• CPC Class Codes: F16H 2200/2082 one freewheel mechanisms
• CPC Class Codes: F16H 3/728 with means to change ratio in the mechanical gearing
• 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: F16H 57/12 Arrangements for adjusting or for taking-up backlash not provided for elsewhere
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/911 with two or more gear sets
• CPC Class Codes: Y10S 903/919 : Stepped shift

Abstract

A tolerance ring is interposed between an output side rotary shaft and a rotor shaft. For this reason, even in a case where a backlash formed in a spline fitting portion between the output side rotary shaft and the rotor shaft is not eliminated, the rotary shafts of both of the output side rotary shaft and the rotor shaft are held by the tolerance ring without a backlash, and rattling noise can be suppressed. An oil supply groove for supplying a lubricant between an annular portion of the tolerance ring and the output side rotary shaft is provided inside an annular groove formed in the output side rotary shaft. With this, it is possible to suppress degradation of the durability of the tolerance ring without performing special processing on the tolerance ring.

Claims

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

a first rotary shaft;

a second rotary shaft;

a spline fitting portion configured to spline-fit the first rotary shaft and the second rotary shaft in a part of a power transmission path from a power source to a drive wheel; and

a tolerance ring provided at a place at which the first rotary shaft is inserted into the second rotary shaft and which is different from the spline fitting portion,

the tolerance ring including an annular portion and a protrusion,

the annular portion being configured to come into contact with one of the first rotary shaft and the second rotary shaft,

the protrusion being configured to come into contact with the other one of the first rotary shaft and the second rotary shaft,

the one of the first rotary shaft and the second rotary shaft being provided with a groove, and

the groove being configured to supply a lubricant to a region of the tolerance ring where the annular portion comes into contact.

2. The power transmission device according to claim 1,

wherein the groove extends along a circumferential direction of the one of the first rotary shaft and the second rotary shaft.

3. The power transmission device according to claim 2,

wherein the groove is provided over the entire circumference in the circumferential direction of the one of the first rotary shaft and the second rotary shaft.

4. The power transmission device according to claim 3,

wherein the tolerance ring has at least one notch in a part in the circumferential direction.

5. The power transmission device according to claim 4,

wherein the one of the first rotary shaft and the second rotary shaft has oil supply holes, the oil supply holes are configured to supply the lubricant to the groove, and the number of the oil supply holes is larger than the number of the at least one notch of the tolerance ring.