Emergency stops and brake devices for motors

A brake device for a motor with a drive shaft configured to rotate, the brake device comprising:

• a housing;
• and
• an emergency stop disposed at least partially within the housing, the emergency stop comprising:
• a blocking device movable between:
• a first blocking device position, at which the blocking device allows rotation of the drive shaft;
• and
• a second blocking device position, at which the blocking device at least substantially stops rotation of the drive shaft;
• a spring disposed at least partially within the housing and configured to urge the blocking device toward the second blocking device position;
• and
• an inhibiting material at least partially surrounding the blocking device, the spring, or both, the inhibiting material comprising a material with a melting point that is at least substantially known, the inhibiting material configured to:
• at least substantially prevent movement of the blocking device from the first blocking device position to the second blocking device position when a temperature of the brake device is below the melting point;
• and
• allow movement of the blocking device from the first blocking device position to the second blocking device position when the temperature of the brake device is above the melting point.

A brake device for a motor with a drive shaft configured to rotate, the brake device comprising:

• a housing;
• a rotor disposed proximate to the housing and coupled to the drive shaft;
• and
• an emergency stop disposed at least partially within the housing, the emergency stop comprising:
• a blocking device movable between:
• a first blocking device position, at which the blocking device does not contact the rotor, and thereby allows rotation of the drive shaft;
• and
• a second blocking device position, at which the blocking device contacts the rotor, and thereby at least substantially stops rotation of the drive shaft;
• a spring configured to be housed at least partially within the housing and to urge the blocking device toward the second blocking device position, wherein the spring is movable between:
• a first spring position, in which the blocking device is allowed to remain in the first blocking device position;
• and
• a second spring position, in which the spring at least facilitates movement of the blocking device from the first blocking device position to the second blocking device position;
• and
• a retaining material at least partially surrounding the blocking device, the spring, or both, the retaining material comprising a material with a melting point that is at least substantially known, the retaining material configured to:
• at least substantially prevent movement of the spring from the first spring position to the second spring position when a temperature of the brake device is below the melting point;
• and
• allow movement of the spring from the first spring position to the second spring position when the temperature of the brake device is above the melting point.