Toroidal type continuoulsy variable transmission

• US 20040067816A1
• Filed: 06/23/2003
• Published: 04/08/2004
• Est. Priority Date: 12/28/2000
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Taketsuna, Yasuji, Tamaki, Shigenori
• Granted Patent: US 7,029,418 B2
• Time in Patent Office: Days
• US Class Current: 476/8
• CPC Class Codes: F16H 15/38 with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
• CPC Class Codes: F16H 57/043 within rotary parts, e.g. axial channels or radial openings in shafts
• CPC Class Codes: F16H 57/049 of the toroid type

Abstract

A toroidai type continuously variable transmission wherein a rolling member is clamped between rotary members; and wherein a rolling face of rotary members being opposed to each other has a curved face, in which its sectional face along the plane including a center axis of rotation is shaped into an arc, in order to allow said rolling face of said rolling member inclining against the center axis of the rotation of said rotary member, characterized by: an oiling hole formed on the portion on the center side of the rotation in said rolling face of the rotary members being opposed to each other, or on the portion on the center side of the rotation leading to said rolling face; and the oil passage for feeding the lubricating oil to the oiling hole, formed on the center side of the rotation in said rotary member, with being communicated with the oiling hole.

Claims

1. A toroidal type continuously variable transmission wherein a rolling member for mediating the transmission of the torque is clamped between at least a pair of rotary members;

and wherein a rolling face of rotary members being opposed to each other has a curved face, in which its sectional face along the plane including a center axis of rotation is shaped into an arc, in order to allow said rolling face of said rolling member inclining against said center axis of the rotation of said rotary member, characterized by comprising;

an oiling hole formed on the portion on the center side of the rotation in said rolling face of the rotary members being opposed to each other, or on the portion on the center side of the rotation leading to said rolling face; and

an oil passage for feeding the lubricating oil to said oiling hole, formed on the center side of the rotation in said rotary member, with being communicated with the oiling hole.

2. A toroidal type continuously variable transmission as set forth in claim 1, characterized:

in that said oiling hole is formed on the portion of said rolling face where the rolling member is not contacted.

3. A toroidal type continuously variable transmission as set forth in claim 1, characterized:

in that said rotary member has a boss portion leading to said rolling face on the center side of the rotation; and

in that said oiling hole is formed on at least any of, the portion of said rolling face where said rolling member is not contacted, or said boss portion.

4. A toroidal type continuously variable transmission as set forth in any of claims 1 to 3, characterized by further comprising:

a temperature detector for detecting any of, a temperature of the rolling face of the rotary member, or a temperature of the rolling member; and

a regulator for regulating amount of the oil to be fed to the rolling face from the oiling hole based on the temperature detected by the temperature detector.

5. A toroidal type continuously variable transmission as set forth in claim 4, characterized:

in that said temperature detector includes a device for detecting said temperature rise based on any of, the temperature of said rolling face, the temperature of the lubricating oil for lubricating said rolling face, or the difference between an input energy and an output energy of said continuously variable transmission

6. A toroidal type continuously variable transmission as set forth in claim 4, characterized:

in that said regulator includes a device for increasing the amount of the oil to be fed to said rolling face from said oiling hole, in case that the temperature detected by said temperature detector excesses a criterion value which is set based on tempering temperature of said rotary member.