| 摘要 |
<p>The invention relates to a welding roller head (710), especially for a resistance seam welding machine, comprising a contact device (720) for transmitting a current between a stator (730) and a rotor (740) that is mounted on the stator (730) in such a way that it can rotate, and a coolant conducting system (750) for cooling the welding roller head (710). Said contact device (720) consists of at least one roller element (721) that is mounted between the rotor (740) and the stator (730) in such a way that it can rotate, and is configured in such a way that it tapers towards one end. Alternatively, the contact devices take the form of washer elements with a membrane-type configuration and the stator consists of a shaft and a washer element that is fixed to the centre of said shaft and is radially oriented, is tightly surrounded by the rotor and has two flat ends that are configured as contact surfaces. This results in a larger contact surface.</p> |
