Power Transmission System For Vehicle

• US 20170167593A1
• Filed: 12/02/2016
• Published: 06/15/2017
• Est. Priority Date: 12/10/2015
• 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, OKUDA, Koichi, TATENO, Hiroyuki, YASUDA, Yuji, TABATA, Atsushi
• Granted Patent: US 10,436,304 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/40 characterised by the assembly or relative disposition of components
• CPC Class Codes: B60K 6/44 Series-parallel 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 2306/03 Lubrication
• 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 arranged between an output-side rotary shaft and a rotor shaft. For this reason, even when looseness in a spline fitting portion of the output-side rotary shaft and rotor shaft is not filled, both the output-side rotary shaft and the rotor shaft are held by the tolerance ring so as not to rattle. Therefore, it is possible to reduce tooth hammer noise that occurs in the spline fitting portion. An output-side rotary shaft has oil passages for supplying lubricating oil to a tolerance ring. Lubricating oil is forcibly supplied through these oil passages to an annular space in which a tolerance ring is accommodated.

Claims

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

a first rotary shaft;

a second rotary shaft, the first rotary shaft and the second rotary shaft arranged around a common axis;

a fitting portion at which the first rotary shaft and the second rotary shaft are fitted and coupled to each other so as to transmit power;

a tolerance ring arranged between the first rotary shaft and the second rotary shaft, the tolerance ring including an annular portion and a protruding portion,

the annular portion configured to contact one of the first rotary shaft and the second rotary shaft, and

the protruding portion protruded from the annular portion toward one of a radially outer side and a radially inner side and being configured to contact the other of the first rotary shaft and the second rotary shaft; and

an oil passage provided in the one of the first rotary shaft and the second rotary shaft, the oil passage being configured to supply lubricating oil to the tolerance ring.

2. The power transmission system according to claim 1, wherein

the one of the first rotary shaft and the second rotary shaft, which contacts the annular portion of the tolerance ring, has the oil passage.

3. The power transmission system according to claim 1, wherein

the first rotary shaft and the second rotary shaft have spigot joint portions, the spigot joint portions are respectively provided on both sides of the tolerance ring in a direction of the axis, the spigot joint portions are provided such that the first rotary shaft and the second rotary shaft are fitted to each other without rattling.

4. The power transmission system according to claim 3, wherein

one of the spigot joint portions is a lubricating oil drain port.

5. The power transmission system according to claim 1, wherein

the protruding portion of the tolerance ring has a helical gear shape.

6. The power transmission system according to claim 4, wherein

the spigot joint portion that is the lubricating oil drain port has a groove, and the groove extends through the spigot joint portion in the direction of the axis.

7. The power transmission system according to claim 6, wherein

the groove of the spigot joint portion is provided so as to be inclined with respect to the direction of the axis.