Continuously variable transmission

• US 7,011,601 B2
• Filed: 12/06/2004
• Issued: 03/14/2006
• Est. Priority Date: 09/02/1997
• Status: Expired due to Term

• Current Assignee: Enviolo BV
• Original Assignee: Fallbrook Technologies Incorporated
• Inventors: Miller, Donald C.
• Primary Examiner(s): Wright, Dirk
• Application Number:
  US11/005,935
• Publication Number:
  US 20050096176A1
• Time in Patent Office: 463 Days
• Field of Search: 476/37, 476/38, 475/189, 475/192, 475/195
• US Class Current: 476/37
• CPC Class Codes: B62M 11/00 Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels with roller engaging the periphery of ground wheel B62M13/00
• CPC Class Codes: F16H 15/28 with external friction surface
• CPC Class Codes: F16H 61/664 Friction gearings

Abstract

A continuously variable transmission is disclosed for use in rotationally or linearly powered machines and vehicles. The single axle transmission provides a simple manual shifting method for the user. An additional embodiment is disclosed which shifts automatically dependent upon the rotational speed of the wheel. Further, the practical commercialization of traction roller transmissions requires improvements in the reliability, ease of shifting, function and simplicity of the transmission. The disclosed transmission may be used in vehicles such as automobiles, motorcycles, and bicycles. The transmission may, for example, be driven by a power transfer mechanism such as a sprocket, gear, pulley or lever, optionally driving a one way clutch attached at one end of the main shaft.

Claims

1. A spindle support and power adjuster assembly for a continuously variable transmission, the assembly comprising:

a spherical power adjuster having a central bore;

a spindle positioned in the central bore, the spindle having first and second spindle ends and a longitudinal axis, wherein each of the spindle ends extends outside the power adjuster;

a first spindle support operationally attached to the first spindle end;

a second spindle support operationally attached to the second spindle end; and

wherein the spindle supports each comprise a rotatable wheel positioned at one end of the spindle support away from the point of attachment of the spindle support and the spindle end.

2. The assembly of claim 1, wherein the first spindle support comprises a bore for receiving the first spindle end.

3. The assembly of claim 2, wherein the second spindle support comprises a bore for receiving the second spindle end.

4. The assembly of claim 3, further comprising spindle rollers, each roller having a bore for receiving a spindle end.

5. The assembly of claim 4, wherein each spindle support is positioned between a spindle roller and a power adjuster.

6. The assembly of claim 1, wherein each spindle support comprises a wheel axle for supporting the rotatable wheel, and wherein the wheel axle has a longitudinal axis oriented perpendicular to the longitudinal axis of the spindles.

7. A support member for a spindle of a traction roller in a continuously variable transmission, the support member comprising:

a body having a first end and a second end;

a bore at the first end of the body for receiving an end of the spindle, wherein the spindle has an axis of rotation; and

a wheel attached to the second end.

8. The support member of claim 7, further comprising a spindle roller having a bore for receiving an end of the spindle, the spindle roller positioned adjacent to the first end of the body.

9. The support member of claim 8, further comprising at least one support roller positioned between the first and second ends of the body, wherein the support roller has an axis of rotation that is perpendicular to the axis of rotation of the spindle.

10. The support member of claim 9, further comprising a roller pin that provides an axle for the support roller.

11. The support member of claim 10, further comprising a clip for fastening the support roller and roller pin to the body.

12. The support member of claim 7, further comprising a wheel axle for supporting the wheel.

13. A method of manufacturing a spindle support and power adjuster assembly for a continuously variable transmission, the method comprising:

providing a spherical power adjuster having a central bore;

positioning a spindle in the central bore, the spindle having first and second spindle ends, wherein each of the spindle ends extends outside the power adjuster;

attaching a first spindle support to the first spindle end at a first point of attachment;

attaching a second spindle support to the second spindle end at a second point of attachment;

providing a plurality of rotatable wheels; and

attaching the wheels to the spindle supports, one wheels for each spindle support, wherein attachment of the wheel to the spindle support is removed from the point of attachment of the spindle support and the spindle end.

14. The method of claim 13, further comprising providing a plurality of support rollers, two for each spindle support, and operationally connecting the support rollers to the spindle support via a roller pin.

15. The method of claim 14, further comprising providing a clip to fasten the support roller and the roller pin to the spindle support.