초록 ▼

A hydraulic motor either of the radial or axial piston type is used for swivelling a hanging load about an upright axis. The motor has a distributor for controlling the flow of hydraulic fluid to the input and drain ducts of the motor. The motor further has hydraulic ducts extending from the stator

A hydraulic motor either of the radial or axial piston type is used for swivelling a hanging load about an upright axis. The motor has a distributor for controlling the flow of hydraulic fluid to the input and drain ducts of the motor. The motor further has hydraulic ducts extending from the stator to the rotor for transmitting fluid required for operation of the actuator of a gripping device or bucket. The distributor floats, so that radial and axial play as well as deformation of the rotor relative to the stator may be taken up without stress. At least some of the hydraulic ducts pass through the distributor, connections being made by suitable rotary transmissions and connecting points within the motor.

대표청구항 ▼

Apparatus for turning hanging loads including at least one hydraulically controlled mechanism about an upright axis, comprising a first motor member having a plurality of peripheral hydraulic cylinders, and hydraulically controlled cam following means in each of said hydraulic cylinders; second moto

Apparatus for turning hanging loads including at least one hydraulically controlled mechanism about an upright axis, comprising a first motor member having a plurality of peripheral hydraulic cylinders, and hydraulically controlled cam following means in each of said hydraulic cylinders; second motor member means comprising a cam box having a cam face positioned relative to said first motor member for engaging said cam following means so that said first motor member and said second motor member means rotate relative to one another; bearing means having predetermined radial play for coupling said first motor member to said second motor member means; distributor means connected to said cam box for controlling fluid flow in said hydraulic cylinders; and a hydraulic supply channel for said hydraulically controlled mechanism, said hydraulic supply channel comprising a first duct passing through said first motor member, a distributor duct passing through said distributor means, rotary connection means connecting said first duct to said distributor duct, a cam box duct passing through said cam box, and a distributor-cam box junction connecting said distributor duct to said cam box duct; and means for sealing said distributor-cam box junction to prevent entrance of fluid into said cam box, said sealing means permitting a second radial play between said distributor means and said second motor member means, said second radial play exceeding said predetermined radial play.