Multiple gear motor drive
First Claim
1. A hydraulic drive comprising multiple gear motors each having a gear motor output shaft, and a common gear engaged by the output shafts of the multiple gear motors, wherein the multiple gear motors include respective meshed pairs of gears disposed in a common housing, one of the gears of each pair has an output shaft provided with a pinion gear for engaging the common gear, and the phase relationship between the pinion gear and corresponding gear of each gear set varies from gear set to gear set.
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Accused Products
Abstract
A hydraulic drive comprising multiple gear motors each having a gear motor output shaft, and a common gear engaged by the output shafts of the multiple gear motors. Each hydraulic motor has a characteristic sinusoidal torque ripple out of phase with the characteristic sinusoidal torque ripple of at least one other hydraulic motor for cancelling torque ripple and thereby reducing the torque ripple at the common gear.
27 Citations
16 Claims
- 1. A hydraulic drive comprising multiple gear motors each having a gear motor output shaft, and a common gear engaged by the output shafts of the multiple gear motors, wherein the multiple gear motors include respective meshed pairs of gears disposed in a common housing, one of the gears of each pair has an output shaft provided with a pinion gear for engaging the common gear, and the phase relationship between the pinion gear and corresponding gear of each gear set varies from gear set to gear set.
- 8. A hydraulic drive comprising multiple hydraulic motors each having an output shaft, and a common gear engaged by the output shafts of the multiple hydraulic motors, and wherein each hydraulic motor has a characteristic periodic torque ripple out of phase with the characteristic periodic torque ripple of at least one other hydraulic motor for cancelling torque ripple and thereby reducing the torque ripple at the common gear, wherein the hydraulic motors are gear motors.
- 11. A hydraulic drive comprising multiple hydraulic motors each having an output shaft, and a common gear engaged by the output shafts of the multiple hydraulic motors, and wherein each hydraulic motor has a characteristic periodic torque ripple out of phase with the characteristic periodic torque ripple of at least one other hydraulic motor for cancelling torque ripple and thereby reducing the torque ripple at the common gear, wherein the multiple hydraulic motors are gear motors respectively including meshed pairs of gears disposed in a common housing.
- 13. A hydraulic drive comprising multiple hydraulic motors each having an output shaft, and a common gear engaged by the output shafts of the multiple hydraulic motors, and wherein each hydraulic motor has a characteristic periodic torque ripple out of phase with the characteristic periodic torque ripple of at least one other hydraulic motor for cancelling torque ripple and thereby reducing the torque le at the common gear, wherein each hydraulic motor has an output shaft provided with a pinion gear for engaging the common gear, and the phase relationship between the pinion gear and corresponding gear of each gear set varies from gear set to gear set.
Specification