Automatic torque compensating drive system
AssigneeHydro-Gear Limited Partnership
InventorsNathan W. Bonny, K. Mike McCoy
Life of this patent
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Abstract
An automatic torque compensating drive system for a hydrostatic transmission, having a torque compensating control mechanism adjusting the swash plate of the hydraulic motor, the swash plate being spring biased to a low-torque, high-speed position and rotatable through a range of positions to a high-torque, low-speed position in response to increasing hydraulic system pressure. When used with a pair of transmissions, a linkage may join the control mechanisms of each transmission to synchronize their torque adjustments.
Claims23
A torque control mechanism for adjusting a torque level of an output of a transmission from a low-torque value to a high-torque value, wherein the transmission includes a hydraulic motor having an adjustable swash plate, said torque control mechanism comprising:
- a camshaft;
- a cam member slidingly engaged to the camshaft and configured to operatively engage the swash plate;
- and
- a biasing member operatively engaged to the cam member to bias the swash plate to a biased position.
A drive system comprising:
- a transmission disposed in a housing and producing an output;
- and
- a torque control mechanism engaged to the transmission and configured to adjust a torque level of the output between a low-torque value and a high-torque value, the torque control mechanism including means for biasing the torque level of the output to the low-torque value, and the torque control mechanism automatically adjusts the output of the transmission in response to load.
A drive system comprising:
- a hydraulic motor disposed in a housing and comprising a cylinder block having a plurality of pistons disposed therein, and an adjustable swash plate engaged to the plurality of pistons;
- and
- a torque control mechanism engaged to the swash plate and configured to move the swash plate between a first position that corresponds to a low-torque value of the output of the hydraulic motor and a second position that corresponds to a high-torque value of the output of the hydraulic motor.
A drive system comprising:
- a first transmission disposed in a first housing and producing a first output;
- a first torque control mechanism engaged to the first transmission and configured to adjust a torque level of the first output between a low-torque value to a high-torque value, the first torque control mechanism including a first biasing member configured to bias the torque level of the first output to the low-torque value;
- a second transmission disposed in a second housing and producing a second output;
- a second torque control mechanism engaged to the second transmission and configured to adjust a torque level of the second output between the low-torque value to the high-torque value, the second torque control mechanism including a second biasing member configured to bias the torque level of the second output to the low-torque value;
- and
- an operative linkage between the first torque control mechanism and the second torque control mechanism configured to cause the torque level of the first output and the torque level of the second output to be substantially similar.
Dependencies are inferred from the claim text.