VEHICLE FOR LINE MARKING

摘要

A vehicle for line marking, having a steering mechanism (10) including: a directional wheel (5) that pivots about a steering shaft (12) coupled to a steering actuator (13); a control actuator (21) responsive to a steering wheel (22); and a universal joint coupling the control actuator (21) and the steering actuator (13) at a fixed angle between 20° to 70°, preferably 30° to 60°; the angle of the universal joint acting to produce a varying steering ratio as the steering wheel is moved away from its centred position. The vehicle includes a hydraulic pump circuit for a motor (101) driven line marking spray device (77) having a hydraulic supply line (105) for the motor with a check valve (107) and a high pressure accumulator (109) between the check valve and the motor and a pressure actuated ram (102) to deactivate the pump (100) when the pressure exceeds a threshold; the motor return line having a low pressure accumulator (110) and a restricted (112) bypass line (111).

主权项

1. A vehicle comprising:
a frame, wheels supporting the frame, at least one of the wheels being a directional wheel which determines the direction of movement of the vehicle, and a steering mechanism including: a mounting for the directional wheel, the mounting including a steering shaft having an axis about which the directional wheel rotates to direct the direction of movement of the apparatus, the steering shaft being coupled to a steering actuator whereby rotation of the steering actuator produces a corresponding rotation of the steering shaft; a control actuator responsive to an operator control device; and a universal joint providing mechanical engagement between the control actuator and the steering actuator, the axis of rotation of the control actuator being at an angle of 20° to 70° to the axis of rotation of the steering actuator, the control actuator having a first alignment corresponding to all wheels including the directional wheel being aligned, whereby rotation of the control actuator produces a variable rotation of the steering actuator depending on the rotation of the control actuator away from the first alignment.