Hydrostatic slewing drive

Expansible chamber devices – With releasable stop or latch means to prevent movement of... – Includes interfitting parts engageable at plural positions...

Reissue Patent

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Details

C092S026000, C092S057000

Reissue Patent

active

RE038843

ABSTRACT:
A hydrostatic slewing drive suitable for use in construction equipment, in particular excavators, has a pinion shaft that is rotationally mounted in a housing. A slewing pinion is connected to the pinion shaft. An axial piston motor that utilizes a swashplate construction is in the housing and has a rotating cylinder block with borings and pistons located in the boring. The cylinder block is in one piece with, or integral with, the pinion shaft. The axial piston motor preferably has a constant flow volume, whereby the swashplate is shaped on a housing component. The pistons are supported by slippers on the swashplate which is provided with hydraulic fluid supply channels to which borings in the slippers and in the piston can be connected. The slewing piston can be detachably fastened to the pinion shaft/cylinder block. There is also a brake that can be actively connected with the pinion shaft/cylinder block. The brake, which is a wet, spring-loaded, multiple-disc brake, is preferably located next to the swashplate base and is connected in rotational synchronization with the pinion shaft/cylinder block by a torsion rod. At least one valve, in particular a control valve, is located between the swashplate and the swashplate base.

REFERENCES:
patent: 3744377 (1973-07-01), Lauck
patent: 6336323 (2002-01-01), Tanabe et al.

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