| 摘要 |
PROBLEM TO BE SOLVED: To further miniaturize a heavy-current circuit integral type hydraulic control device for driving a motor. SOLUTION: A passage groove 64 is formed in a housing 40 for hydraulic units and is used as a part of a path D for the ventilation and drain of an operation section 9 so that it is unnecessary to provide a space corresponding to the passage groove 64 in a housing 3 for a heavy-current circuit unit. This allows the miniaturization of the housing 3 for the heavy-current circuit unit, i.e., the miniaturization of the heavy-current circuit integral type hydraulic control device for droving a motor to make it possible to deepen a board chamber 6a, which leads to house the most of electronic boards 4 in the chamber 6a. The swelling of a cove 11 in an electronic board section 6 is thereby reduced to miniaturize the housing 3 for the heavy-current circuit unit, i.e., the miniaturization of the heavy-current circuit integral type hydraulic control device for driving a motor.
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