| 摘要 |
<p>The free end of the arm is actively connected to a tool, e.g. via a telescopic coupling unit and cardan joint rotary axles. A holder unit located beneath the arm is secured to this free end and cooperates with a first end of an extendible device, the second end of this device cooperates indirectly with the tool. The working point of the second end of the device is oriented below an upper cardan joint rotation axis, i.e. the axis extending at right angles to a vertical plane extending through the arm. The extendible device can be extended so that the tool can be rotated from a freely suspended position into an upwards-slanting position in which it is supported by a plate. The cardan joint rotary axles comprise an axle and a journal for an arm-shaped bracket, which along with the plate is in contact with the rotor unit surface.</p> |
