Power tool with spindle lock
View Patent ↗Illustrative embodiments of power tools with spindle locks are disclosed. In one illustrative embodiment, a power tool may include a drive train including an output assembly, the output assembly including a spindle configured to support a tool element, a power source configured to selectively supply energy to the drive train to cause the output assembly including the spindle to rotate, a switch movable between a first position in which the power source does not supply energy to the drive train and a second position in which the power source supplies energy to the drive train, and a spindle lock configured to automatically engage the output assembly including the spindle when the switch is in the first position and to automatically disengage the output assembly including the spindle when the switch is in the second position, the spindle lock preventing rotation of the output assembly including the spindle when engaged.
1. A power tool with a spindle lock assembly comprising:
an output assembly that includes a spindle configured to support a tool element;
wherein the spindle is rotatable about a spindle axis;
a power source;
an electric motor that rotates about a motor axis when supplied with energy from the power source;
wherein the motor axis is perpendicular to the spindle axis;
a solenoid actuator movable along the spindle axis perpendicular to the motor axis;
wherein both the solenoid actuator and the electric motor are electrically connectible and disconnectible from the power source;
a switch movable between a released position in which the power source does not supply energy to the electric motor and the solenoid actuator, and a depressed position in which the power source supplies energy to the electric motor and the solenoid actuator;
a spindle lock that is operable along the spindle axis perpendicular to the motor axis,
wherein the spindle lock includes an upper face, a lower face opposite the upper face, and one or more teeth extending from the lower face away from the upper face; and
an output gear coupled to the spindle;
wherein the output gear includes a plurality of teeth;
wherein the spindle lock is coupled to the solenoid actuator which is configured to move the spindle lock along the spindle axis in response to the solenoid actuator being connected or disconnected to the to the power source which selectively moves the spindle lock into and out of engagement with the output gear of the output assembly;
wherein when the switch is moved to the released position, the power source does not supply energy to both the electric motor and the solenoid actuator which causes the solenoid actuator to bias toward the output assembly such that the spindle lock is moved along the spindle axis perpendicular to the motor axis and into engagement with the output gear of the spindle lock by the one or more teeth of the spindle lock that mate with the plurality of teeth of the output gear which prevents rotation of the spindle; and
wherein when the switch is moved into the depressed position, the power source supplies power to the electric motor and the solenoid actuator which causes the spindle lock to disengage from the output gear to allow rotation of the spindle about the spindle axis.
2. The power tool of claim 1 , wherein the spindle is formed to mate with a socket.
3. The power tool of claim 1 , further comprising a housing extending along a longitudinal axis over a first maximum distance and supporting the power source, electric motor, the output assembly, and the switch of the power tool, the first maximum distance being longer than a second maximum distance over which the housing extends along a lateral axis that is perpendicular to the longitudinal axis.
4. The power tool of claim 3 , wherein the switch is a trigger movable along an axis that is non-parallel to the longitudinal axis of the housing.