Power tool with a light for illuminating a workpiece

A power tool comprising:

• an output spindle;
• a motor providing a source of rotary power;
• a transmission drivingly coupling the motor to the output spindle;
• an end effector coupled to the output spindle for movement therewith;
• a housing into which the output spindle, the motor and the transmission are received;
• a generator;
• and
• a light coupled to the generator for receipt of electrical power therefrom;
• wherein the generator comprises a field winding and a set of magnets, wherein the field winding is coupled for rotation with a first one of an output shaft of the motor, a first rotating component of or driven by the transmission, a second rotating component of or driven by the transmission, the output spindle and the end effector such that the field winding rotates at a first rotational speed when the motor is operating, and wherein the set of magnets is coupled for rotation with a second, different one of the output shaft of the motor, the first rotating component of or driven by the transmission, the second rotating component of or driven by the transmission, the output spindle and the end effector such that the set of magnets rotates at a second rotational speed when the motor is operating, the second rotational speed being different from the first rotational speed such that an electric current is produced in the field winding.

A power tool comprising:

• an output spindle;
• a motor providing a source of rotary power;
• a transmission drivingly coupling the motor to the output spindle;
• an end effector coupled to the output spindle for rotational movement therewith;
• a housing into which the output spindle, the motor and the transmission are received;
• and
• a light system comprising a first portion and a second portion, the first portion being coupled to the housing and including a pair of first terminals that are configured to be coupled to a source of electric power, the second portion being mounted to the end effector so that the second portion rotates together with the end effector about an axis, the second portion comprising a connector and a circuit assembly, the connector comprising a pair of second terminals that are configured to engage the pair of first terminals to conduct electricity between the first and second portions, the circuit assembly comprising a light element that is electrically coupled to the pair of second terminals.

A power tool comprising:

• a housing assembly having a housing structure and a case that is coupled to the housing structure, the case comprising a first case member and a second case member;
• an output spindle at least partially received in the case;
• a first bearing mounted to the first case member, the first bearing being configured to support a first axial end of the output spindle;
• a second bearing mounted to the second case member, the second bearing being configured to support a second, opposite axial end of the output spindle;
• a motor housed in the housing assembly and providing a source of rotary power;
• a transmission housed in the housing assembly and drivingly coupling the motor to the output spindle;
• and
• a light system comprising a light ring and a circuit assembly, the circuit assembly comprising a light emitting element and being received in the light ring, the light ring being received axially between the first and second case members, wherein the light ring forms a portion of an exterior surface of the power tool.

A power tool comprising:

• a housing assembly having a housing structure and a case that is coupled to the housing structure, the case comprising a first case member and a second case member;
• an output spindle at least partially received in the case;
• a first bearing mounted to the first case member, the first bearing being configured to support a first axial end of the output spindle;
• a second bearing mounted to the second case member, the second bearing being configured to support a second, opposite axial end of the output spindle;
• a motor housed in the housing assembly and providing a source of rotary power;
• a transmission housed in the housing assembly and drivingly coupling the motor to the output spindle;
• a light system comprising a light ring and a circuit assembly, the circuit assembly comprising a light emitting element and being received in the light ring, the light ring being received axially between the first and second case members;
• and
• a resilient element disposed between the light ring and the case, the resilient element exerting a clamping force onto the light ring to inhibit axial movement of the light ring relative to the case.