Power tool including an output position sensor
First Claim
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1. A power tool comprising:
- a motor including a rotor and a stator;
a motor sensor board positioned perpendicularly with respect to the rotor of the motor, the motor sensor board extending in a radial outward direction with respect to the rotor of the motor;
an impact mechanism coupled to the motor, the impact mechanism includinga hammer driven by the motor, andan anvil positioned at a nose of the power tool, the anvil configured to receive an impact from the hammer;
an impact case housing the anvil and the hammer;
a sensor assembly mounted to a top surface of a circuit board and located within a recess below the rotor of the motor in the radial outward direction, the circuit board positioned parallel with respect to the rotor of the motor, a plane formed by the top surface of the circuit board intersecting the motor sensor board, the sensor assembly configured to generate an output signal indicative of the hammer impacting the anvil; and
a controller including a processor and a memory, the controller connected to the sensor assembly and to the motor, the controller configured to;
receive the output signal from the sensor assembly,detect a number of impacts executed by the hammer based on the output signal from the sensor assembly, andcontrol the motor based on the number of impacts executed by the hammer.
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Abstract
A power tool including a motor and an impact mechanism. The impact mechanism is coupled to the motor and includes a hammer driven by the motor, and an anvil positioned at a nose of the power tool, and configured to receive an impact from the hammer. The power tool also includes a sensor assembly positioned at the nose of the power tool, and an electronic processor. The sensor assembly includes an output position sensor configured to generate an output signal indicative of a position of the hammer or the anvil. The electronic processor is coupled to the output position sensor and to the motor, and is configured to operate the motor based on the output signal from the output position sensor.
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Citations
23 Claims
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1. A power tool comprising:
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a motor including a rotor and a stator; a motor sensor board positioned perpendicularly with respect to the rotor of the motor, the motor sensor board extending in a radial outward direction with respect to the rotor of the motor; an impact mechanism coupled to the motor, the impact mechanism including a hammer driven by the motor, and an anvil positioned at a nose of the power tool, the anvil configured to receive an impact from the hammer; an impact case housing the anvil and the hammer; a sensor assembly mounted to a top surface of a circuit board and located within a recess below the rotor of the motor in the radial outward direction, the circuit board positioned parallel with respect to the rotor of the motor, a plane formed by the top surface of the circuit board intersecting the motor sensor board, the sensor assembly configured to generate an output signal indicative of the hammer impacting the anvil; and a controller including a processor and a memory, the controller connected to the sensor assembly and to the motor, the controller configured to; receive the output signal from the sensor assembly, detect a number of impacts executed by the hammer based on the output signal from the sensor assembly, and control the motor based on the number of impacts executed by the hammer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power tool comprising:
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a motor including a rotor and a stator; a motor sensor board extending in a radial outward direction with respect to the rotor of the motor; an impact mechanism coupled to the motor, the impact mechanism including a hammer driven by the motor, and an anvil positioned at a nose of the power tool, the anvil configured to receive an impact from the hammer; an impact case housing the anvil and the hammer; a sensor assembly mounted to a top surface of a circuit board and located within a recess below the rotor of the motor in the radial outward direction, a plane formed by the top surface of the circuit board intersecting the motor sensor board, the sensor assembly configured to generate an output signal indicative of the hammer impacting the anvil; and a controller including a processor and a memory, the controller connected to the sensor assembly and to the motor, the controller configured to; receive the output signal from the sensor assembly, detect an impact executed by the hammer based on the output signal from the sensor assembly, and control the motor based on the impact executed by the hammer. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A power tool comprising:
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a motor including a rotor and a stator; a motor sensor board including a Hall Effect sensor and extending below the rotor of the motor; an impact mechanism coupled to the motor, the impact mechanism including a hammer driven by the motor, and an anvil positioned at a nose of the power tool, the anvil configured to receive an impact from the hammer; an impact case housing the anvil and the hammer; a sensor assembly mounted to a top surface of a circuit board and located within a recess below the rotor of the motor, a plane formed by the top surface of the circuit board intersecting the motor sensor board, the sensor assembly configured to generate an output signal indicative of the hammer impacting the anvil; and a controller including a processor and a memory, the controller connected to the sensor assembly and to the motor, the controller configured to; receive the output signal from the sensor assembly, detect an impact executed by the hammer based on the output signal from the sensor assembly, and control the motor based on the impact executed by the hammer. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification
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Current AssigneeMilwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
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Original AssigneeMilwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
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InventorsDey, IV, John Stanley, Schneider, Jacob Paul
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Primary Examiner(s)Weeks, Gloria R
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Application NumberUS16/142,153Publication NumberTime in Patent Office216 DaysField of Search173 10US Class CurrentCPC Class CodesB25B 21/02 with means for imparting im...B25B 21/026 Impact clutchesB25B 23/1475 for impact wrenches or scre...G01D 5/2006 by influencing the self-ind...
