Clamping brake for hydraulic rotating block
AssigneeHydro-Gear Limited Partnership
InventorThomas J. Langenfeld
Life of this patent
Estimating the term…
Abstract
A cylinder-block-clamping brake apparatus has both parking brake capability and limited dynamic braking capability. The brake apparatus includes a first clamp arm and an opposed second clamp arm that are disposed about a rotating cylinder block that is drivingly engaged to a motor shaft of a hydraulic or hydrostatic drive unit. A first end of each clamp arm is in contact with a brake actuation cam and a second end of each arm is configured to interface one with the other to form a floating slide-pivot joint. Each clamp arm includes at least one block contact pad formed thereon. When the cam is pivoted in either direction, block contact pads formed on the clamp arms are forced against the cylinder block to prevent rotation of the cylinder block and motor shaft.
Claims19
A hydraulic drive apparatus, comprising:
- a rotatable cylinder block drivingly engaged to a motor shaft;
- and
- a brake apparatus, comprising:
- an actuation shaft pivotable about a pivot axis and having a cam disposed thereon;
- a first clamp arm comprising a cam-contacting bar end configured to contact the cam, a hook end opposite the cam-contacting bar end, and at least one first block contact pad disposed between the cam-contacting bar end and the hook end;
- and
- a second clamp arm comprising a cam-contacting hook end configured to contact the cam, a slide-pivot bar end opposite the cam-contacting hook end, the slide-pivot bar end captured by the hook end of the first clamp arm to form a slide-pivot joint, and at least one second block contact pad disposed between the cam-contacting hook end and the slide-pivot bar end;
- wherein pivoting of the actuation shaft about the pivot axis causes the first clamp arm and the second clamp arm to slidingly bear against one another to cause the at least one first block contact pad and the at least one second block contact pad to apply a clamping force to the rotatable cylinder block to provide a braking torque to the rotatable cylinder block.
A brake apparatus for a rotatable cylinder block of a hydraulic drive, the brake apparatus comprising:
- a first clamp arm and a second clamp arm, both clamp arms having a first end and a second end, and at least one block contact pad disposed between the respective first end and second end;
- and
- a brake actuation cam in contact with the first end of the first clamp arm and first end of the second clamp arm;
- wherein the second end of the first clamp arm is configured to interface with the second end of the second clamp arm to form a floating joint, and wherein actuation of the brake actuation cam causes the at least one block contact pad of both the first clamp arm and the second clamp arm to engage and provide a braking force to the rotatable cylinder block.
A hydraulic drive apparatus, comprising:
- a cylinder block having an axis of rotation;
- a brake actuation cam having a pivot axis;
- a first arcuate clamp arm having a cam-contact bar end, a hook end opposite the cam-contact bar end, and a first set of two flat-surface contact pads disposed between the cam-contact bar end and the hook end;
- and
- a second arcuate clamp arm having a cam-contact hook end, a bar end opposite the cam-contact hook end, and a second set of two flat-surface contact pads disposed between the cam-contact hook end and the bar end;
- wherein the axis of rotation and the pivot axis are parallel, and the first and second sets of flat-surface contact pads are symmetrically disposed about a plane passing through the axis of rotation and the pivot axis.
Dependencies are inferred from the claim text.