Materials handling vehicle with a module capable of changing a steerable wheel to control handle position ratio
First Claim
1. A materials handling vehicle comprising:
- a frame comprising an operator'"'"'s compartment;
wheels supported on said frame, at least one of said wheels being a steerable wheel;
a steer-by-wire system associated with said steerable wheel to effect angular movement of said steerable wheel about a first axis, said steer-by-wire system comprising;
a control handle capable of being moved by an operator to generate a steer control signal;
a selection switch capable of generating one of a first select signal and a second select signal, wherein said selection switch comprises a speed selection switch and said first select signal comprises a low speed select signal and said second select signal comprises a high speed select signal;
a steer motor coupled to said steerable wheel to effect angular movement of said steerable wheel about the first axis;
control apparatus coupled to said control handle to receive said steer control signal, coupled to said selection switch to receive said one select signal, and coupled to said steer motor to generate a first drive signal to said steer motor to effect angular movement of said steerable wheel about the first axis, andsaid control apparatus converting said steer control signal to a corresponding desired angular position for said steerable wheel using one of first and second steerable wheel-to-control-handle-position ratios, wherein said one ratio is selected based on said one select signal.
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Accused Products
Abstract
A materials handling vehicle is provided comprising: a frame comprising an operator'"'"'s compartment; wheels supported on the frame, at least one of the wheels being a steerable wheel; a steer-by-wire system associated with the steerable wheel to effect angular movement of the steerable wheel about a first axis; and a control apparatus. The steer-by-wire system comprises a control handle capable of being moved by an operator to generate a steer control signal, a selection switch capable of generating one of a first select signal and a second select signal, and a steer motor coupled to the steerable wheel to effect angular movement of the steerable wheel about the first axis. The control apparatus may be coupled to the control handle to receive the steer control signal, coupled to the selection switch to receive the one select signal, and coupled to the steer motor to generate a first drive signal to the steer motor to effect angular movement of the steerable wheel about the first axis. The control apparatus may convert the steer control signal to a corresponding desired angular position for the steerable wheel using one of first and second steerable-wheel-to-control-handle-position ratios, wherein the one ratio is selected based on the one select signal.
230 Citations
5 Claims
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1. A materials handling vehicle comprising:
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a frame comprising an operator'"'"'s compartment; wheels supported on said frame, at least one of said wheels being a steerable wheel; a steer-by-wire system associated with said steerable wheel to effect angular movement of said steerable wheel about a first axis, said steer-by-wire system comprising; a control handle capable of being moved by an operator to generate a steer control signal; a selection switch capable of generating one of a first select signal and a second select signal, wherein said selection switch comprises a speed selection switch and said first select signal comprises a low speed select signal and said second select signal comprises a high speed select signal; a steer motor coupled to said steerable wheel to effect angular movement of said steerable wheel about the first axis; control apparatus coupled to said control handle to receive said steer control signal, coupled to said selection switch to receive said one select signal, and coupled to said steer motor to generate a first drive signal to said steer motor to effect angular movement of said steerable wheel about the first axis, and said control apparatus converting said steer control signal to a corresponding desired angular position for said steerable wheel using one of first and second steerable wheel-to-control-handle-position ratios, wherein said one ratio is selected based on said one select signal. - View Dependent Claims (2, 3, 4, 5)
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Specification