Device for transmitting torque between two rotatable shafts
AssigneeIpumatic AB
InventorBo Lundstrom
Life of this patent
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Abstract
A device for transmitting torque between two rotatable shaft members (2, 3) in a stationary housing (1) contains a number of alternate clutch discs (10, 11) engageable to counteract differential rotational speed between the two shaft members, to which they are connected, a hydraulic clutch piston (12) to engage the clutch discs and a hydraulic pump arrangement (13-22) driven by the speed differential between the two shaft members. An externally controllable pressure-reducing valve (25-27) is provided in the hydraulic connection from the clutch piston to the low pressure side of the pump arrangement, whose high pressure side is connected to the clutch piston.
Claims7
A device for transmitting torque between two rotatable, generally axially aligned shafts, the device containing in a stationary housing (1;
- 40) two rotatable shaft members (2, 3;
- 41, 42) for connection to said shafts, a number of alternate clutch discs (10, 11;
- 47, 48) connected to the two shaft members and engageable to counteract differential rotational speed between the shaft members, at least one hydraulic clutch piston (12;
- 49) to engage the clutch discs, and a hydraulic pump arrangement (13-22;
- 54-63) driven by the speed differential between the two shaft members, the high-pressure side of the pump arrangement being connected to the clutch piston and a restriction (25-27;
- 68-70) being provided in the hydraulic connection from the clutch piston back to the low-pressure side of the pump arrangement, wherein the restriction is an externally controllable pressure-reducing valve (25-27;
- 68-70).
Dependencies are inferred from the claim text.