Continuously variable transmission
AssigneeVan Doorne's Transmissie B.V.
InventorJohannes Gerardus Ludovicus Maria Van Spijk
Life of this patent
Estimating the term…
Abstract
A continuously variable transmission is provided with an adjustable pulley assembly including two sheaves on a pulley shaft, at least one sheave is axially movable with respect to the pulley shaft by a hydraulically operated movement, the movement includes a piston/cylinder assembly for generating a first force acting on the movable sheave and centrifugal pressure compensator for generating a second force acting on the movable sheave in a direction opposite with respect to the first force; the centrifugal pressure compensator includes a further cylinder fixed to the axially movable sheave in radial direction beyond the piston/cylinder assembly, and a further piston fixed to the pulley shaft, the further piston and the further cylinder form a further piston/cylinder assembly.
Claims15
A continuously variable transmission (1) comprising:
- an adjustable pulley assembly (7) comprising two sheaves (8, 9) on a pulley shaft (6),
- at least one sheave (8) being axially movable with respect to the pulley shaft (6) by a hydraulically operated movement means,
- said movement means comprising
- a piston/cylinder assembly (22;
- 26, 27, 29) provided with a piston (26) and a cylinder (27) fixed to the axially movable sheave (8) for generating a first force acting on the movable sheave (8), and
- a centrifugal pressure compensating means for generating a second force acting on the movable sheave (8) in a direction opposite with respect to said first force,
- said centrifugal pressure compensating means comprising
- a further cylinder (33, 33′), fixed to the axially movable sheave (8) in a radial direction outward of the piston/cylinder assembly (22;
- 26, 27, 29), and
- a further piston (32), fixed to the pulley shaft (6),
- said further piston (32) and said further cylinder (33, 33′) forming a further piston/cylinder assembly.
A continuously variable transmission (1) comprising:
- an adjustable pulley assembly (7) including
- a pulley shaft (6), and
- two sheaves (8, 9) located on the pulley shaft (6), one of the two sheave being a movable sheave (8);
- and
- a hydraulically-operated movement means arranged to axially move the movable sheave (8) with respect to the pulley shaft (6),
- the movement means including
- a piston (26) and a cylinder (27) forming a piston/cylinder assembly (26, 27) for generating a first force acting on the movable sheave (8), and
- a centrifugal pressure compensating means for generating a second force acting on the movable sheave (8) in a direction opposite with respect to the first force,
- the centrifugal pressure compensating means including
- a further cylinder (33) fixed to the movable sheave (8) in a radial direction beyond the piston and cylinder assembly (26, 27), and
- a further piston (32), fixed to the pulley shaft (6) via the piston (26),
- the further piston (32) and the further cylinder (33) forming a further piston/cylinder assembly.
A continuously variable transmission (1) comprising:
- an adjustable pulley assembly (7) having
- a pulley shaft (6), and
- two sheaves (8, 9) located on the pulley shaft (6), one of the two sheave being a movable sheave (8);
- and
- a hydraulically-operated movement means arranged to axially move the movable sheave (8) with respect to the pulley shaft (6),
- the movement means including
- a piston (26) and a cylinder (27) forming a piston/cylinder assembly (26, 27) for generating a first force acting on the movable sheave (8), and
- a centrifugal pressure compensating means for generating a second force acting on the movable sheave (8) in a direction opposite with respect to the first force,
- the centrifugal pressure compensating means including
- a further cylinder (33) fixed to the movable sheave (8) in a radial direction beyond the piston and cylinder assembly (26, 27),
- a further piston (32), fixed to the pulley shaft (6), the further piston (32) and the further cylinder (33) forming a further piston/cylinder assembly, and
- a baffle plate (34) fixed to the further piston (32).
Dependencies are inferred from the claim text.