| 摘要 |
PURPOSE:To increase transmitting torque by providing a compressor compresing air in a main tank and a high pressure sub-tank accumulating air compress ed by said compressor, for an air feed line to an air cylinder. CONSTITUTION:Air in a main tank 50 is compressed by a compressor 60 to be accumulated in a sub-tank 62. In this case, when a manual switch 57 is in a 'ON' condition, No.1 and No.2 electromagnetic control valve 52 and 54 are turned on. When No.1 electromagnetic valve 52 is in a 'ON' condition, an air pipe 51 is opened, and when No.2 electromagnetic valve 54 is in a 'ON' condition, a branch pipe 53 is closed. As a result, air pressure from the sub-tank 62 is entirely supplied to a cylinder 22 so that a differential gear is locked with a multi-plate clutch 20 connected regardless of vehicle speeds and the like. On the other hand, when a vehicle is running while a manual switch 56 is in a 'OFF' condition, if the vehicle is low in speed, No.1 and No.2 electromagnetic valve 52 and 54 are turned off while the lock of the differential gear is released.
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