Hydraulic apparatus return to neutral mechanism

摘要

A hydraulic apparatus is provided with a return to neutral mechanism for returning a trunnion control bracket arm to a neutral position. The return to neutral mechanism comprises a pair of springs, one spring connecting a fixed bracket to a first rotatable bracket and the other spring connecting the fixed bracket to a second rotatable bracket. The mechanism uses springs with different spring constants and the springs are attached to the brackets in a single plane.

主权项

1. A hydraulic apparatus comprising:
a housing; a trunnion arm extending from the housing; a first bracket rotationally coupled to the trunnion arm; a second bracket fixed to the housing; a third bracket rotatable about the trunnion arm; a fourth bracket rotatable about the trunnion arm; a first biasing member biasing third bracket to move the first bracket toward a neutral position of the trunnion arm when the first bracket is rotated in a first direction; and a second biasing member biasing the fourth bracket to move the first bracket toward the neutral position of the trunnion arm when the first bracket is rotated in a second direction.