| 发明名称 | Power wrench | ||
| 摘要 | An electric power wrench for fastening and loosening joints includes: a main shaft for delivering a torque to a joint, an electric motor that is arranged to selectively drive the main shaft in two opposed rotational directions, a control unit for controlling the drive of the electric motor, and a transmission that connects the electric motor to the main shaft. The control unit has a first drive mode in which it controls the electric motor such that it delivers a continuous torque in a forward direction, and delivers torque pulses in an opposite backward direction, wherein the transmission includes an inherent play and wherein the torque pulses are produced in said play. | ||
| 申请公布号 | US9636809(B2) | 申请公布日期 | 2017.05.02 |
| 申请号 | US201314390750 | 申请日期 | 2013.04.03 |
| 申请人 | ATLAS COPCO INDUSTRIAL TECHNIQUE AB | 发明人 | Lars Elsmark Karl Johan |
| 分类号 | B25B21/02 | 主分类号 | B25B21/02 |
| 代理机构 | Holtz, Holtz & Volek PC | 代理人 | Holtz, Holtz & Volek PC |
| 主权项 | 1. An electric power wrench for fastening and loosening joints, comprising: a main shaft for delivering a torque to a joint, an electric motor that is arranged to selectively drive the main shaft in two opposed rotational directions, a control unit for controlling the drive of the electric motor, and a transmission that connects the electric motor to the main shaft, wherein the control unit has a first drive mode in which it is adapted to control the electric motor such that it delivers a continuous torque when driven in a forward direction, and such that it delivers torque pulses when driven in an opposite backward direction, wherein the transmission includes an inherent play and wherein the torque pulses are produced within said play. | ||
| 地址 | Stockholm SE | ||