Bevel gear load balance in a hydrostatic transmission

Details Bevel gear load balance in a hydrostatic transmission Bevel gear load balance in a hydrostatic transmission

1993-03-01

1995-02-28

Look, Edward K.

Power plants

Pressure fluid source and motor

Methods of operation

60487, 91491, F16D 3100, F16D 3900

Patent

active

053926030

ABSTRACT:
An apparatus for balancing and supporting various loads exerted on the pump cylinder block and associated bevel gear in a radial piston type hydraulic transmission for assuring concentric rotation about the pintle during operation. A hydraulic pressure pad, acting as a hydraulic piston, is located on the outer surface of the pintle at least partially underneath the pump cylinder block hub portion for counteracting the loads exerted against the pump cylinder block and associated bevel gear. A groove circumferentially disposed in the outer surface of the pintle supplies oil to the pressure pad from a bore disposed in the groove and in communication with the high pressure passage of the pintle. The pressure pad is preferably disposed 90.degree. from the input shaft and associated input bevel gear. Additional grooving on the outside circumferential surface of the pintle provides lubrication between the rotating cylinder blocks of the pump and motor, and the pintle.

REFERENCES:
patent: 2237018 (1941-04-01), Tweedale
patent: 2599609 (1952-06-01), Carey
patent: 4244279 (1981-01-01), Stewart et al.
patent: 4730546 (1988-03-01), Eickmann
patent: 5042252 (1991-08-01), Havens et al.
patent: 5078659 (1992-01-01), von Kaler
patent: 5239827 (1993-08-01), Havens

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