A
brake assembly of a mute tubular motor is installed on the
tail portion of the tubular motor and comprises a
brake disk,
brake pads, a fixing base, an armature base, a spring, an
electromagnet and a brake cover. The brake cover is meshed with a shell of the tubular motor through teeth, the brake disk is fixed to a rotary shaft of the tubular motor, the brake pads are arranged around the periphery of the brake disk, the spring is installed in a spring groove in the center of the
electromagnet, the fixing base is meshed with the inner wall of the brake cover through teeth, one side of the armature base makes contact with the spring, and the spring keeps applying push force to the armature base. A sliding shaft is arranged in the center of the armature base, and the sliding shaft penetrates through a positioning hole of the fixing base. Multiple sets of splayed oblique shafts are arranged on the armature base, and the oblique shafts penetrate through
kidney-shaped holes in the fixing base and stretch into oblique holes in the brake pads. The brake
assembly is simple in structure and easy to
machine; the tubular motor is braked sensitively by a
control circuit in the mode that the
electromagnet is attracted to the armature base, and the brake pads are further controlled to be unfolded and tightened up through the oblique shafts. Friction plates of the brake
assembly are abraded in an integral
contact mode, the friction degrees in all positions are the same, and therefore the brake assembly is good in braking effect, longer in service life and low in
noise.