Cylinder block brake for a hydrostatic drive apparatus
AssigneeHydro-Gear Limited Partnership
InventorsThomas J. Langenfeld, Shane A. Deters
Life of this patent
Estimating the term…
Abstract
A cylinder block brake for a hydrostatic transmission or transaxle is provided. A braking member is located in a housing adjacent to a motor cylinder block and has a first position where it is not engaged to the motor cylinder block and a second, braking position where it is engaged to the motor cylinder block. A brake actuation shaft is located in the housing and has a cam portion located along its longitudinal axis. The cam portion is positioned to engage the braking member so that rotation of the brake actuation shaft moves the braking member between the engaged and disengaged positions.
Claims20
A hydraulic drive apparatus, comprising:
- a rotatable motor cylinder block mounted in a housing;
- a motor output shaft engaged to and driven by the motor cylinder block;
- a braking member mounted in the housing adjacent to the motor cylinder block and having a first position where it is not engaged to the motor cylinder block and a second position where it is engaged to the motor cylinder block;
- a brake actuation shaft located in the housing and comprising a proximal end, a distal end and a cam portion located along the longitudinal axis of the brake actuation shaft between the proximal end and distal end, wherein the cam portion is positioned to engage the braking member, so that rotation of the brake actuation shaft moves the braking member between the first and second positions.
A hydraulic drive apparatus, comprising:
- a center section mounted in a housing and comprising a motor running surface and a brake pocket;
- a motor cylinder block rotatably mounted on the motor running surface and engaged to and driving a motor output shaft;
- and
- a brake member located in the brake pocket and moveable between a first position where it is not in contact with the motor cylinder block and a second position where it contacts and provides a braking force to an external surface of the motor cylinder block.
A braking mechanism for a hydraulic drive apparatus having a housing and a hydraulic motor cylinder block mounted in the housing, where the motor cylinder block drives a motor shaft, the brake mechanism comprising:
- a rotatable brake actuation shaft having a proximal end and a distal end, wherein at least a portion of the brake actuation shaft is located in the housing;
- a cam located on the periphery of the portion of the brake actuation shaft located in the housing and adjacent to the motor cylinder block, the cam having a first position where it is not engaged to the motor cylinder block and a second position where it contacts the motor cylinder block to provide a braking force thereto.
Dependencies are inferred from the claim text.