Power tool

A power tool having a working element capable of rotating or reciprocating, the power tool comprising:

• a housing having a forward end and defining a longitudinal axis extending therein;
• an output shaft operatively connected to the working element at the housing forward end;
• a motor producing rotary input power to drive the output shaft for one of rotation and reciprocation;
• a wobble driver mounted on the output shaft in a fixed axial position relative thereto to drive the shaft for reciprocation therewith and to freely rotate relative thereto and including a rear driven gear to freely rotate the wobble driver about the output shaft and a forward cam member inclined relative to the longitudinal axis to convert the rotation of the wobble driver about the output shaft to reciprocation of the wobble driver which drives the output shaft therewith along the longitudinal axis;
• an actuator cooperating with the wobble driver to cause the rotary input power of the motor to one of (1) drive the output shaft for rotation to rotate the working element, and (2) drive the wobble driver for reciprocation with the output shaft along the longitudinal axis to reciprocate the working element;
• and
• a cam engaging portion mounted in the housing and an actuator portion with the portions being selectively movable relative to each other between (1) a first position adjacent to each other to cooperate to form a channel such that the wobble cam member engages the portions as the wobble driver rotates causing the wobble driver and output shaft to reciprocate along the longitudinal axis, and (2) a second position spaced further from each other than when in their adjacent first position to position the actuator portion adjacent the rear driven gear preventing the wobble driver from reciprocating along the longitudinal axis.

A power tool selectively movable between a rotary mode of operation and a reciprocating mode of operation, the power tool comprising:

• an output shaft for driving the working tool to rotate or reciprocate;
• an elongate housing having a longitudinal axis extending therein along which the output shaft extends;
• a motor having a primary drive shaft and a driving gear on the drive shaft;
• a secondary shaft mounted in the housing and having a plurality of gears with a first one of the secondary shaft gears cooperating with the primary shaft driving gear for rotary driving of the secondary shaft;
• a wobble driver having a collar portion and a gear portion, the wobble driver being mounted on the output shaft to freely rotate therearound and to drive the output shaft along the longitudinal axis;
• a driven gear mounted on the output shaft and being selectively movable on the shaft along the longitudinal axis to (1) an engaged position where the driven gear cooperates with a second one of the secondary shaft gears for driving the output shaft for rotation with the power tool in a rotary mode of operation, and (2) a disengaged position where a third one of the secondary shaft gears cooperates with the wobble gear portion to drive the output shaft for reciprocation with the power tool in a reciprocating mode of operation, the third secondary shaft gear causing rotation of the collar about the output shaft with the driven gear in either one of the engaged and disengaged positions;
• and
• an actuating mechanism to selectively allow an operator to change the power tool from one of the rotary and reciprocating modes of operation to the other of the rotary and reciprocating modes of operation.

A power tool having a working element for cleaning and buffing, the power tool comprising:

• a housing defining a longitudinal axis therein;
• a motor for producing rotary input power to drive the working element;
• an output shaft operatively connected to the working element and having a first state wherein the shaft and working element undergo a first motion and a second state wherein the shaft and working element undergo a second motion distinct from the first motion;
• a transmission system between the motor and output shaft which transmits the rotary input power of the motor to the output shaft to drive the output shaft in either one of its first and second states;
• a control mounted on the housing and selectively movable between first and second positions such that with the control in the first position the transmission system causes the output shaft to be driven in its first state and with the control in the second position the transmission system causes the output shaft to be driven in its second state;
• and
• a motor switch mounted on the housing selectively movable between an "off" position with the motor deenergized and an "on" position with the motor energized to drive the output shaft in one of its first and second states and with the switch in the "on" position the switch cooperates to lock the control in one of its first and second positions against selective movement to the other of its first and second positions.