초록 ▼

A material handling vehicle is provided which is capable of operation on the highway, off-road and on railroad tracks. The vehicle includes a lower truck chassis having an engine and a first operator\s cab and an upper structure which includes an upper structure operator\s cab and a material handlin

A material handling vehicle is provided which is capable of operation on the highway, off-road and on railroad tracks. The vehicle includes a lower truck chassis having an engine and a first operator\s cab and an upper structure which includes an upper structure operator\s cab and a material handling implement. In the travel mode of operation, the engine is directly connected to the torque converter of a powershift transmission to provide a rotational output to the drive wheels. In the off-road or remote operating mode of the excavator, the transmission is controlled so as to prohibit the connection between the torque converter and the transmission gears. However, a power take-off on the transmission is coupled to a hydraulic pump which provides hydraulic fluid under pressure to a hydraulic motor which, in turn, may provide rotational power to a secondary input to the transmission to provide drive power. In the railroad operating mode of the present invention, the engine is coupled by means of the torque converter to the transmission to provide driving power. In addition, the engine is coupled to the hydraulic pump to provide hydraulic fluid under pressure to power the excavator functions. The upper structure cab includes two throttle controls for controlling engine speed while operating in the remote operating mode.

대표청구항 ▼

A material handling vehicle comprising: a. a lower truck chassis supported by a plurality of wheels, at least two of which are drive wheels, said lower truck chassis having a first operator\s station; b. an upper structure mounted on said lower chassis and having a second operator\s station; c. a ma

A material handling vehicle comprising: a. a lower truck chassis supported by a plurality of wheels, at least two of which are drive wheels, said lower truck chassis having a first operator\s station; b. an upper structure mounted on said lower chassis and having a second operator\s station; c. a manipulatable material handling implement mounted on said upper structure; d. an engine mounted on said lower chassis, said engine having a throttle control regulator which is controllable by a primary throttle control means in said first operator\s station; e. a transmission means mounted on said lower chassis, said transmission means having a torque converter and also having drive gears coupled to said drive wheels, said torque converter having a first input means powered by said engine and a first output means which may be coupled to said drive gears and also having a second output means which may be powered by said first input means; f. a hydraulic power means; g. a first coupling means for coupling said hydraulic power means to said second output means and for uncoupling said hydraulic power means from said second output means; h. secondary throttle control means in said second operator\s station for controlling said throttle control regulator; and i. first control means for alternatively (1) coupling said first output means of said torque converter to said drive gears while causing said first coupling means to uncouple said hydraulic power means from said second output means or (2) coupling said first output means to said drive gears while causing said first coupling means to couple said hydraulic power means to said second output means.