| 摘要 |
<p>A drive unit (1) of a pressure device, such as a welding gun, includes a piezoelectric type load cell (17) adapted to be arranged in an easily attached and removed manner and to have relatively small capacity. The drive unit (1) includes a through-hole (6), formed in a rotary shaft (5) of a drive motor (1), which is a drive source (1), and a pressure shaft (10), configured to be able to move with a part thereof being in the through-hole (6). The rotary shaft (5) is rotatably supported by the bearing (7), and the piezoelectric type load cell (17) is sandwiched between a preload striker plate (18), through which the pressure shaft (10) passes, and a preload setting striker plate (19), through which the pressure shaft (10) passes with a preload exerted on the load cell (17).</p> |
