Work vehicle
AssigneeHitachi Construction Machinery Co., Ltd.
InventorsKeisuke NAITOU, Ryou TANIGUCHI
Life of this patent
Estimating the term…
Abstract
Provided is a wheel loader in which the speed position of the transmission can be easily changed with a small number of switches. The wheel loader 1 includes a tilting angle sensor 9 for detecting the tilting angle of the vehicle body. In case that the vehicle body is traveling on an uphill or a downhill with a transmission 33 in a higher speed position than the lowest speed position, and the tilting angle detected by the tilting angle sensor 9 is not smaller than a prescribed threshold value, a transmission control device 45 sends the transmission 33 a command to downshift the transmission 33 one speed position by each operation of a shiftdown switch 62.
Claims4
A work vehicle comprising:
- a vehicle body with a pair of wheels attached to each of a front and a rear;
- a working device provided on the vehicle body;
- an engine configured to generate a travel driving force for the vehicle body;
- a transmission with a plurality of speed positions to which the driving force of the engine is transmitted through a torque converter;
- a shiftdown switch configured to give the transmission a command to downshift the speed position by operation;
- a speed sensor configured to detect a speed of the vehicle body;
- and
- a transmission control device configured to control the speed position of the transmission according to a command signal given from the shiftdown switch or the speed of the vehicle body detected by the speed sensor,
- wherein a tilting angle detector configured to detect an inclination of the vehicle body is provided, and
- the transmission control device takes the command signal given to the transmission by a single operation of the shiftdown switch as a command to downshift one speed position at a time or a command to downshift to a lowest speed position, according to the speed position of the transmission during traveling of the vehicle body, the speed of the vehicle body detected by the speed sensor, and the tilting angle detected by the tilting angle detector.
Dependencies are inferred from the claim text.