Steering assembly for utility vehicles

Motor vehicles – Surface effect vehicles – Dynamic seal or fluid curtain

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Details

180149, 92 33, 74 8915, B62D 506

Patent

active

052537269

ABSTRACT:
A steering assembly for a utility vehicle having a support frame. The assembly includes a fluid-powered rotary actuator, with a body having a rotatable hollow shaft extending therewithin. An annular piston is mounted within the body about the shaft for reciprocal axial movement and rollers are provided for transmitting torque between the body and the shaft to produce rotational movement of the shaft in response to axial movement of the piston. An axially extendable member extends longitudinally within a central bore of the shaft with a lower end portion projecting out of the body and being attached to forks to which a wheel is rotatably mounted. The central bore of the shaft and the extendable member have meshing straight splines which transmit the rotational drive of the shaft to the extendable member, while allowing free axial movement of the extendable member. The extendable member has a piston portion which defines an interior fluid chamber. An accumulator is in fluid communication with the fluid chamber. The fluid chamber is filled with hydraulic oil, as is a portion of the accumulator. The remainder of the accumulator is filled with compressible nitrogen gas. The extendable member piston portion moves upwardly within the central bore in response to upper movement of the wheel to transmit the force of the upward movement through the hydraulic oil to the compressible fluid for absorption of at least a portion of the transmitted force.

REFERENCES:
patent: 3865207 (1975-02-01), Schwab et al.
patent: 3961681 (1976-06-01), Fisher
patent: 4003404 (1977-01-01), Burckhardt
patent: 4691795 (1987-09-01), Wehmeyer et al.
patent: 4881419 (1989-11-01), Weyer
patent: 5131486 (1992-07-01), Kato et al.
Miller Formless Systems Brochure on M-8100 Automated Slipformer, Miller Formless Co., Inc., 1985, 4 pages.

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