Patent ID: 8946949
Filing Date: 2015-02-03
Classification: B23Q,B25F

Abstract:
1. An electric wall saw, comprising: a saw head having a saw blade, wherein the saw blade is arranged at a swivelable saw arm and is rotatable around a rotational axis, wherein the saw head is displaceable via a guide carriage in a feed direction; a motor assembly having a first motor, wherein the saw blade is rotatable by the first motor, a second motor, wherein the saw arm is swivelable around a swivel axis by the second motor, and a third motor, wherein the guide carriage is displaceable along the feed direction by the third motor; a motor housing with a first receiving area, wherein the first motor is disposed within the first receiving area, and a second receiving area, wherein the second motor is disposed within the second receiving area, and a third receiving area, wherein the third motor is disposed within the third receiving area; a cooling channel through which a cooling medium flows, wherein the first motor is coolable by the cooling channel which surrounds the first motor; and an electronic assembly with an electronic components including a first frequency converter for the first motor, a second frequency converter for the second motor, a third frequency converter for the third motor and a braking resistor for dissipating brake energy when decelerating the saw blade; wherein cooling of the electronic components of the electronic assembly is carried out exclusively via the motor housing and the motor housing includes a first cooling surface, wherein the first frequency converter is arranged on the first cooling surface, a second cooling surface, wherein the second frequency converter is arranged on the second cooling surface, a third cooling surface, wherein the third frequency converter is arranged on the third cooling surface, and a cooling borehole, wherein the braking resistor is arranged in the cooling borehole.