Through hole rotating cylinder
AssigneeLogansport Machine Co., Inc.
InventorThomas F. Thompson
Life of this patent
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Abstract
A through hole rotating cylinder for controlling a workpiece gripping chuck associated with a rotary machine tool. The cylinder includes a cylinder body assembly, piston tube and fluid distributor section rotatable within a housing and defining a central axial opening. Bearings supported between the housing and cylinder body assembly are lubricated by flow from a hydraulic system used to move the piston tube in the cylinder body assembly. A coolant collector receives coolant liquid travelling through the central axial opening. A seal assembly between the coolant collector and the bearings prevents coolant from contaminating the hydraulic fluid in the hydraulic system.
Claims8
A through hole rotating cylinder assembly for actuating a draw bar for a workpiece holding means, said cylinder assembly comprising in combination:
- a cylinder body assembly having a central axis and defining a cylinder surrounding said central axis;
- a piston tube having a workpiece receiving central axial opening aligned with said central axis and having a radially extending piston portion received in said cylinder for reciprocal movement in the axial direction;
- means on said piston tube for interconnecting said piston tube with the draw bar;
- a hydraulic system including fluid passageway means defined in said cylinder body assembly for reciprocating said piston in said cylinder;
- a housing surrounding at least part of said cylinder body assembly;
- bearing means disposed between said housing and said cylinder body assembly for supporting said cylinder body assembly for rotation relative to said housing about said central axis;
- said passageway means including passage means for supplying fluid to said bearing means;
- coolant collector means communicating with said workpiece receiving central axial opening of said piston tube, and;
- a seal assembly disposed between said coolant collector means and said bearing means for isolating said coolant collector means from said hydraulic system;
- said seal assembly including a pair of cooperating seal elements supported respectively by said housing and by said cylinder body assembly;
- the first of said seal elements comprising a rigid cylindrical surface coaxial with said central axis and the second of said seal elements comprising a flexible seal disk extending at least partly in the radial direction and having a free periphery in surface contact with said rigid cylindrical surface.
Dependencies are inferred from the claim text.