Impact tool angular velocity measurement system

Patent metadata

Field	Value
Publication number	US-11097405-B2
Application number	US-201715664577-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Jul 31, 2017
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

An impact tool is provided which includes a drive source configured to rotate an output drive. A hammer is movable in a first direction to apply a rotational impact force on an anvil which rotates the output drive. A first hammer angle sensor set to a first signal channel and located proximate to a surface of the hammer. A plurality of regularly spaced targets are located on the surface of the hammer. Each of the plurality of regularly spaced targets are detectable by the first hammer sensor. And detection of one or more of the plurality of regularly spaced targets by the first hammer sensor indicates movement of the hammer.

First claim

The invention claimed is:

1. An impact tool comprising:
an output drive;
an anvil coupled to the output drive, the anvil having an axis of rotation and including an anvil impact surface configured to rotate about the axis of rotation, the anvil impact surface including an outer end positioned radially outward from the axis of rotation;
a hammer configured to apply a rotational impact force on the anvil to rotate the output drive, the hammer including a hammer impact surface configured to engage the anvil impact surface;
a plurality of spaced apart targets located on a surface of the anvil, the surface of the anvil and plurality of spaced apart targets located radially inward toward the axis of rotation from the outer end of the anvil impact surface; and
an anvil angle sensor located proximate to the surface of the anvil, the anvil angle sensor configured to detect respective ones of the plurality of spaced apart targets;
a second plurality of spaced apart targets located on a surface of the hammer; and
a hammer angle sensor located proximate to a surface of the hammer, the hammer angle sensor configured to detect respective ones of the second plurality of spaced apart targets;
a controller electrically coupled with the anvil angle sensor and the hammer angle sensor,
wherein the anvil angle sensor is configured to generate a first signal in response to detection of one or more of the plurality of spaced apart targets by the anvil angle sensor and the hammer angle sensor is configured to generate a second signal in response to detection of one or more of the second plurality of spaced apart targets by the hammer angle sensor, the first signal and the second signal being furnished to the controller, and
wherein the controller determines at least one of an angular position of the hammer, an angular position of the anvil, and angular position of the output drive, an angular velocity of the hammer, an angular velocity of the anvil, an angular velocity of the output drive, an angular kinetic energy in the hammer, and a quantity of energy delivered to the anvil by the hammer based at least partially on the first signal and the second signal.

2. The impact tool as recited in claim 1 , further comprising a second anvil angle sensor located proximate to the surface of the anvil and adjacent to the anvil angle sensor, the second anvil angle sensor configured to detect respective ones of the plurality of spaced apart targets.

3. The impact tool as recited in claim 2 , wherein the anvil sensor and the second anvil sensor are configured to detect respective ones of the plurality of spaced apart targets to indicate angular movement of the anvil in one or both of a clockwise rotation or a counterclockwise rotation.

4. The impact tool as recited in claim 1 , further comprising:
a controller electrically coupled with the anvil angle sensor,
wherein the anvil angle sensor is configured to generate a signal in response to detection of one or more of the plurality of spaced apart targets by the anvil angle sensor, the signal being furnished to the controller, and
wherein the controller determines at least one of an angular position of the anvil, an angular position of the output drive, an angular velocity of the anvil, an angular velocity of the output drive, and a quantity of energy delivered to the anvil by the hammer based at least partially on the signal.

5. The impact tool as recited in claim 1 , further comprising a second hammer angle sensor located proximate to the surface of the hammer and adjacent to the hammer angle sensor, the second hammer angle sensor configured to detect respective ones of the second plurality of spaced apart targets.

6. The impact tool as recited in claim 5 , wherein the hammer sensor and the second hammer sensor are configured to detect respective ones of the plurality of spaced apart targets to indicate angular movement of the hammer in one or both of a clockwise rotation or a counterclockwise rotation.

7. The impact tool as recited in claim 1 , further comprising a transmitter configured to wirelessly transmit a signal generated by the controller, the signal containing data indicative of at least one of an angular position of the hammer, an angular position of the anvil, an angular position of the output drive, an angular velocity of the hammer, and angular velocity of the anvil, an angular velocity of the output drive, an angular kinetic energy in the hammer, and a quantity of energy delivered to the anvil by the hammer based at least partially on the first signal and the second signal.

8. The impact tool as recited in claim 1 , further comprising a data storage, the data storage configured to store data generated by the controller that is indicative of at least one of an angular position of the hammer, an angular position of the anvil, an angular position of the output drive, an angular velocity of the hammer, an angular velocity of the anvil, an angular velocity of the output drive, an angular kinetic energy in the hammer, and a quantity of energy delivered to the anvil by the hammer based at least partially on the first signal and the second signal.

9. The impact tool as recited in claim 1 , wherein respective ones of the plurality of spaced apart targets comprises one or more of ferromagnetic markings, capacitive markings, optical indicia, physically detectable markings, and electronically detectable markings.

10. The impact tool as recited in claim 1 , further comprising:
a tool housing; and
a gyroscopic sensor disposed within the tool housing,
wherein the gyroscopic sensor is configured to detect rotation of the tool housing about an axis coincident with the axis of rotation of the anvil.

11. The impact tool as recited in claim 1 , further comprising an accelerometer configured to detect an impact between the hammer and the anvil.

12. The impact tool as recited in claim 1 , further comprising:
a motor configured to furnish an output torque to the hammer; and
a motor sensor configured to detect the output torque furnished by the motor.

13. The impact tool as recited in claim 1 , further comprising at least one strain gauge disposed on the anvil, the at least one strain gauge configured to detect a torque generated by the anvil.

14. An impact tool comprising:
an output drive;
an anvil coupled to the output drive, the anvil having an axis of rotation and including an anvil impact surface configured to rotate about the axis of rotation, the anvil impact surface including an outer end positioned radially outward from the axis of rotation;
a hammer configured to apply a rotational impact force on the anvil to rotate the output drive, the hammer including a hammer impact surface configured to engage the anvil impact surface;
a first plurality of spaced apart targets located on a surface of the anvil, the surface of the anvil located radially inward toward the axis of rotation from the outer end of the anvil impact surface;
an anvil angle sensor located proximate to the surface of the anvil, the anvil angle sensor configured to detect respective ones of the plurality of spaced apart targets;
a second plurality of spaced apart targets located on a surface of the hammer; and
a hammer angle sensor located proximate to a surface of the hammer, the hammer angle sensor configured to detect respective ones of the second plurality of spaced apart targets;
a controller electrically coupled with the anvil angle sensor and the hammer angle sensor, the anvil angle sensor configured to generate a first signal in response to detection of one or more of the plurality of spaced apart targets by the anvil angle sensor

Assignees

• Ingersoll Rand Ind U S Inc

Inventors

• Seith Warren A
• Urban Jason D
• Pyles Douglas E
• Mcclung Mark T

Classifications

• B25B21/026

  Impact clutches · CPC title

• B25B23/1475 Primary

  for impact wrenches or screwdrivers · CPC title

• B25B21/02

  with means for imparting impact to screwdriver blade or nut socket · CPC title

• B25D17/00

  Details of, or accessories for, portable power-driven percussive tools {(details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00)} · CPC title

• B25D11/04

  in which the tool bit or anvil is hit by an impulse member · CPC title