Method of detecting a workpiece jam condition in a fastener tool
AssigneeTechtronic Cordless GP
InventorsYing Xiang TAN, Hai Ling LIN, Xi HE, Jin Lin ZHOU
Life of this patent
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Abstract
A method of detecting a workpiece jam condition in a pneumatic tool includes striking a workpiece by a blade of the tool, detecting whether a piston to which the blade is attached reaches a predetermined position within a predetermined time, and determining a workpiece jam condition has occurred if the piston does not reach the predetermined position within the predetermined time.
Claims15
A method of detecting a workpiece jam condition in a pneumatic tool, the pneumatic tool comprising a motor;
- a drive mechanism connected to the motor and adapted to drive a piston;
- and a cylinder filled with high-pressure gas;
- the piston accommodated in the cylinder and suitable for a reciprocating motion within the cylinder;
- the drive mechanism comprising a blade fixed to the piston, and a gear coupled to the motor;
- the gear comprising a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade;
- wherein the method comprising the steps of:
- a) striking the workpiece with the blade;
- b) detecting whether the piston reaches a predetermined position within a predetermined time;
- and
- c) if the piston does not reach the predetermined position within the predetermined time, determining a workpiece jam condition has occurred.
A pneumatic tool comprising:
- a motor;
- a drive mechanism connected to the motor and adapted to drive a piston;
- and
- a cylinder filled with high-pressure gas;
- wherein the piston is accommodated in the cylinder and suitable for a reciprocating motion within the cylinder;
- wherein the drive mechanism includes a blade fixed to the piston and a gear coupled to the motor, wherein the gear includes a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade;
- and
- wherein the pneumatic tool further comprises an electronic device adapted to lock the blade.
A method of calibrating a drive mechanism in a pneumatic tool, the pneumatic tool comprising a motor;
- a drive mechanism connected to the motor and adapted to drive a piston;
- and a cylinder filled with high-pressure gas;
- the piston accommodated in the cylinder and suitable for a reciprocating motion within the cylinder;
- the drive mechanism comprising a blade fixed to the piston configured for striking a workpiece and a gear coupled to the motor;
- the gear comprising a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade;
- wherein the method comprising the steps of:
- a) sensing an angular position of the gear;
- b) determining if the gear and/or the blade is in a default position;
- and
- c) if either the gear or the blade is not in the default position, moving the gear and/or the blade to the respective default positions.
Dependencies are inferred from the claim text.