Vehicle with auxiliary traveling device

A vehicle with an auxiliary traveling device which travels at a normal traveling speed by transmitting a rotational torque of a traveling prime mover to driving wheels via a rotary power transmission shaft, a drive shaft speed reducer and a drive shaft while a normal traveling primary power transmission is in a range other than a neutral range, and performs a required work by transmitting the rotational torque of said traveling prime mover to an external work implement via an external power takeoff mechanism when said normal traveling primary power transmission is in said neutral range, comprising:

• said auxiliary traveling device being formed by connecting a hydraulic pressure generator to an external power takeoff shaft of said external power takeoff mechanism to be driven by said rotational torque of said traveling prime mover, and connecting a hydraulically controlled power transmission for traveling at inching speed to said rotary power transmission shaft, said hydraulically controlled power transmission for traveling at inching speed incorporating a hydraulic motor connected to said hydraulic pressure generator;
• said auxiliary traveling device being operated for enabling travel at inching speed in conjunction with operation of said external work implement when said primary power transmission for normal traveling is placed at neutral range position, and
• when said primary power transmission for normal traveling is shifted out of said neutral range position, said external power takeoff mechanism and said hydraulically controlled power transmission for traveling at inching speed being made inoperative instantly in response to an electrical signal from a neutral position detector incorporated in said primary power transmission for normal traveling.

A vehicle with an auxiliary traveling device comprising:

• a power train mechanism driving said vehicle to travel at a normal traveling speed by transmitting a rotational torque of a traveling prime mover to driving wheels via a rotary power transmission shaft, a drive shaft speed reducer and a drive shaft while a normal traveling primary power transmission is in a range other than a neutral range, and to transmit a rotational torque of said traveling prime mover to an external work implement via an external power takeoff mechanism and an external power takeoff shaft for implementing a required work when said normal traveling primary power transmission is in said neutral range;
• said auxiliary traveling device being formed by connecting a hydraulic pressure generator to an external power takeoff shaft of said external power takeoff mechanism to be driven by said rotational torque of said traveling prime mover, and connecting a hydraulically controlled power transmission for traveling at inching speed to said rotary power transmission shaft, said hydraulically controlled power transmission incorporating a hydraulic motor connected to said hydraulic pressure generator;
• said auxiliary traveling device being operated for enabling travel at inching speed in conjunction with operation of said external work implement when said primary power transmission for normal traveling is placed at neutral range position, and
• when said primary power transmission for normal traveling is shifted out of said neutral range position, said external power takeoff mechanism and said hydraulically controlled power transmission for traveling at inching speed being made inoperative instantly in response to an electrical signal from a neutral position detector incorporated in said primary power transmission for normal traveling.