Brake device, drive unit, and industrial device

A drive unit for an industrial device, the drive unit comprising:

• a brake device having
• a first device having a shaft;
• a brake element having a first frictional brake surface and an engageable structure;
• a second device rotatable relative to the first device about a rotation axis, the second device comprising:
• a member having an opening,
• a second frictional brake surface, and
• a forcing member pre-tensioned to force the second frictional brake surface against the first frictional brake surface;
• and
• an actuator connected to the first device, the actuator including an engaging structure movable between a disengaged position, where the engaging structure does not engage the engageable structure, and an engaged position, where the engaging structure engages the engageable structure to brake relative rotation between the first device and the second device about the rotation axis;
• wherein the shaft is concentric with the rotation axis and passes through the opening;
• a traction wheel rotatable about the rotation axis, the traction wheel including the second member;
• and
• an electric wheel motor arranged to drive the traction wheel about the rotation axis.

An industrial device comprising a brake device having:

• a first device having a shaft;
• a brake element having a first frictional brake surface and an engageable structure;
• a second device rotatable relative to the first device about a rotation axis, the second device comprising:
• a member having an opening,
• a second frictional brake surface, and
• a forcing member pre-tensioned to force the second frictional brake surface against the first frictional brake surface;
• and
• an actuator connected to the first device, the actuator including an engaging structure movable between a disengaged position, where the engaging structure does not engage the engageable structure, and an engaged position, where the engaging structure engages the engageable structure to brake relative rotation between the first device and the second device about the rotation axis;
• wherein the shaft is concentric with the rotation axis and passes through the opening or a drive unit.