| 摘要 |
A fluid pressure apparatus capable of achieving stable pressing is obtained. The fluid pressure apparatus comprises a fluid pressure pump ( 1 ) driven by an electric motor ( 6 ) and rotatable in both directions. Both ports ( 14, 16 ) of a fluid pressure cylinder ( 12 ) are respectively connected to both ports ( 2, 4 ) of the fluid pressure pump ( 1 ) via a pair of flow paths ( 8, 10 ). A throttle ( 32 ) is disposed on a leak flow path ( 30 ) which communicates a high pressure side with a low pressure side of the pair of flow paths ( 8, 10 ), while the pressing operation is performed by a fluid pressure cylinder ( 12 ). Furthermore, the fluid pressure apparatus comprises a position control circuit ( 38 ) for controlling the electric motor ( 6 ) based on a position detected by a movement detection sensor ( 34 ) for detecting movement by the fluid pressure cylinder ( 12 ), a pressure control circuit ( 40 ) for controlling the electric motor ( 6 ) based on pressure in the flow path ( 10 ) on the high pressure side detected by the pressure sensor ( 36 ), and a switch circuit ( 42 ) for switching control by the poison control circuit ( 38 ) to control by the pressure control circuit ( 40 ).
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