Loading cam for continuously variable toroidal transmissions

• US 5,899,827 A
• Filed: 04/22/1997
• Issued: 05/04/1999
• Est. Priority Date: 04/26/1996
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Nakano, Masaki, Hibi, Toshifumi
• Primary Examiner(s): Marmor, Charles A.
• Assistant Examiner(s): Charles, Marcus
• Application Number:
  US08/844,761
• Time in Patent Office: 742 Days
• Field of Search: 476/40, 476/42, 476/10, 476/46, 476/48, 476/41, 476/2, 476/8
• US Class Current: 476/41
• 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 57/0427 on rotary parts, e.g. using baffles for collecting lubricant by centrifugal force
• CPC Class Codes: F16H 57/049 of the toroid type

Abstract

A loading cam for continuously variable transmissions includes cam rollers contacting an input disk and a cam flange to press the input disk in the axial direction of a main shaft of the transmission upon shifting, a holding member engaged with the cam flange to hold the cam rollers, and a cover attached to the holding member. The cover cooperates with the holding member to define a passage for supplying lubricating oil for the cam rollers.

Claims

1. A loading cam for a continuously variable transmission provided with input and output disks disposed to face each other with respect to a main shaft of the transmission, a power roller frictionally engaged with the input and output disks, and a cam flange disposed at the back of the input disk, the loading cam comprising:

cam rollers contacting the input disk and the cam flange, said cam rollers pressing the input disk in an axial direction of the main shaft upon shifting;

a holding member engaged with the cam flange, said holding member holding said cam rollers; and

a cover attached to said holding member, said cover cooperating with said holding member to define a passage for supplying lubricating oil for said cam rollers.

2. A loading cam as claimed in claim 1, wherein said holding member is formed with channels which correspond to said cam rollers.

3. A loading cam as claimed in claim 2, wherein said channels include grooves formed in said axial direction of the main shaft.

4. A loading cam as claimed in claim 2, wherein said channels include holes radially formed through said holding member.

5. A loading cam as claimed in claim 1, wherein said cover is formed with recesses which correspond to said cam rollers.

6. A loading cam as claimed in claim 1, wherein said cover is integrated with said holding member.

7. In a continuously variable transmission:

input and output disks disposed to face each other with respect to a main shaft of the transmission;

a power roller frictionally engaged with said input and output disks;

a cam flange disposed at a back of said input disk; and

a loading cam comprising;

cam rollers contacting said input disk and said cam flange, said cam rollers pressing said input disk in an axial direction of said main shaft upon shifting;

a holding member engaged with said cam flange, said holding member holding said cam rollers; and

a cover attached to said holding member, said cover cooperating with said holding member to define a passage for supplying lubricating oil for said cam rollers.

8. In a continuously variable transmission as claimed in claim 7, wherein said holding member is formed with channels which correspond to said cam rollers.

9. In a continuously variable transmission as claimed in claim 8, wherein said channels include grooves formed in said axial direction of the main shaft.

10. In a continuously variable transmission as claimed in claim 8, wherein said channels include holes radially formed through said holding member.

11. In a continuously variable transmission as claimed in claim 7, wherein said cover is formed with recesses which correspond to said cam rollers.

12. In a continuously variable transmission as claimed in claim 7, wherein said cover is integrated with said holding member.