초록 ▼

A rotary tool, such as an impact wrench, operable in a forward mode and a reverse mode. The rotary tool includes a housing having a forward end and supporting a motor. The motor has a motor shaft extending axially through the housing and defining an axis. The rotary tool also include a frame support

A rotary tool, such as an impact wrench, operable in a forward mode and a reverse mode. The rotary tool includes a housing having a forward end and supporting a motor. The motor has a motor shaft extending axially through the housing and defining an axis. The rotary tool also include a frame supported in the housing and being rotatable relative to the housing about the axis, an output shaft supported in the forward end of the housing and rotatable about the axis, and a hammer pivotably coupled to the frame and defining a central aperture. The hammer has a first jaw and a second jaw extending into the central aperture. The first jaw and the second jaw are non-symmetrical.

대표청구항 ▼

1. A rotary tool operable in a forward mode and a reverse mode at a plurality of speeds, the plurality of speeds including a maximum speed, the rotary tool comprising:a housing having a forward end and a rearward end and defining an axis extending between the forward end and the rearward end, the re

1. A rotary tool operable in a forward mode and a reverse mode at a plurality of speeds, the plurality of speeds including a maximum speed, the rotary tool comprising:a housing having a forward end and a rearward end and defining an axis extending between the forward end and the rearward end, the rearward end supporting a motor operable in a forward direction in the forward mode and a reverse direction in the reverse mode; an output shaft supported in the forward end of the housing and rotatable about the axis; and a hammer supported in the housing and operable to transfer a first rotational force from the motor to the output shaft in the reverse mode and a second rotational force from the motor to the output shaft in the forward mode, the first force being greater than the second force, wherein the hammer defines a central aperture and includes a first jaw extending into the central aperture and a second jaw extending into the central aperture, the first jaw and the second jaw being non-symmetrical. 2. The rotary tool of claim 1, further comprising a frame supported in the housing and being rotatable about the axis and relative to the housing, and wherein the hammer is pivotably coupled to the frame for rotation with the frame about the axis.3. The rotary tool of claim 1, wherein an interior surface defines the central aperture and, wherein the first jaw gradually intersects the interior surface and wherein the second jaw is substantially perpendicular to at least a portion of the interior surface.4. The rotary tool of claim 1, wherein a reverse engaging surface of the first jaw engages the output shaft in the reverse mode and a forward engaging surface of the second jaw engages the output shaft in the forward mode.5. The rotary tool of claim 1, wherein the output shaft has a first end and a second end, the first end including an anvil, the anvil interacting with the hammer to transfer the first rotational force from the motor to the output shaft, and the second end being engageable with a fastener.6. The rotary tool of claim 5, wherein the anvil includes a leading face and a trailing face, the first jaw impacting the trailing face in the reverse mode, the second jaw impacting the leading face in the forward mode.7. The rotary tool of claim 6, wherein the first jaw lockingly engages the trailing face in the reverse mode and, the second jaw slidingly engages the leading face in the forward mode.8. The rotary tool of claim 5, wherein the first jaw has a first leading surface and the second jaw has a second leading surface, and wherein the first jaw engages the first leading surface in the reverse mode and the second jaw engages the second leading surface in the forward mode.9. The rotary tool of claim 1, wherein the motor is an air motor.10. The rotary tool of claim 1, wherein the motor is an electric motor.11. A rotary tool operable in a forward mode and a reverse mode at a plurality of speeds, the plurality of speeds including a maximum speed, the rotary tool comprising:a housing having a forward end and a rearward end and defining an axis extending between the forward end and the rearward end, the rearward end supporting a motor operable in a forward direction in the forward mode and a reverse direction in the reverse mode; an output shaft supported in the forward end of the housing and rotatable about the axis and having a first end and a second end, the first end including an anvil having a substantially arcuate leading face and an angled trailing face and the second end being engageable with a fastener; a hammer supported in the housing and operable to transfer a first rotational force from the motor to the output shaft in the reverse mode and a second rotational force from the motor to the output shaft in the forward mode, the first force being greater than the second force, wherein the anvil interacts with the hammer to transfer the first rotational force from the motor to the output shaft. 12. A rotary tool operable in a forward mode and a reverse mode, the rotary tool comprising:a housing having a forward end and supporting a motor, the motor having a motor shaft extending axially through the housing and defining an axis; a frame coupled to the motor shaft and being rotatable relative to the housing about the axis in response to rotation of the motor shaft; an output shaft supported in the forward end of the housing and rotatable about the axis; and a hammer pivotably coupled to the frame and defining a central aperture, the hammer having a first jaw and a second jaw extending into the central aperture, the first jaw and the second jaw being non-symmetrical, the first jaw and the second jaw transferring rotational motion of the hammer to the output shaft. 13. The rotary tool of claim 1, wherein the output shaft includes an anvil, and wherein the first jaw engages the anvil in the reverse mode and the second jaw engages the anvil in the forward mode.14. The rotary tool of claim 13, wherein the anvil has a substantially arcuate leading face and an angled trailing face.15. The rotary tool of claim 13, wherein the anvil includes a leading face and a trailing face, the first jaw impacting the trailing face in the reverse mode, the second jaw impacting the leading face in the forward mode.16. The rotary tool of claim 12, wherein the anvil has a substantially arcuate leading face and an angled trailing face, the first jaw impacting the leading face in the reverse mode, the second jaw slidably impacting the trailing face in the forward mode.17. The rotary tool of claim 16, wherein the first jaw has a first trailing surface and the second jaw has a second leading surface, and wherein the first jaw engages the first trailing surface in the reverse mode and the second jaw engages the second leading surface in the reverse mode.18. The rotary tool of claim 12, wherein the motor is an air motor.19. The rotary tool of claim 12, wherein the motor is an electric motor.20. The rotary tool of claim 12, wherein the hammer is operable to transfer a first rotational force from the motor to the output shaft in the reverse mode and a second rotational force from the motor to the output shaft in the forward mode, the first force being greater than the second force.21. A rotary tool operable in a forward mode and a reverse mode, the rotary tool comprising:a housing having a forward end and supporting a motor, the motor having a motor shaft extending axially through the housing and defining an axis; a frame coupled to the motor shaft and being rotatable relative to the housing about the axis in response to rotation of the motor shaft; a hammer pivotably coupled to the frame and defining a central aperture, the hammer having a first jaw and a second jaw extending into the central aperture; and an output shaft supported in the forward end of the housing and being rotatable about the axis, the output shaft having an anvil extending axially through the central aperture, the first jaw lockingly engaging the anvil in the reverse mode and the second jaw slidingly engaging the anvil in the forward mode, the first jaw and the second jaw transferring rotational motion of the hammer to the output shaft wherein the hammer is operable to transfer a first rotational force from the motor to the output shaft in the reverse mode and a second rotational force from the motor to the output shaft in the forward mode, the first force being greater than the second force. 22. A rotary tool operable in a forward mode and a reverse mode the rotary tool comprising:a housing having a forward end and supporting a motor, the motor having a motor shaft extending axially through the housing and defining an axis; a frame coupled to the motor shaft and being rotatable relative to the housing about the axis in response to rotation of the motor shaft; a hammer pivotably coupled to the frame and defining a central aperture, the hammer having a first jaw and a second jaw extending into the central aperture; and an output shaft supported in the forward end of the housing and being rotatable about the axis, the output shaft having an anvil extending axially through the central aperture, the first jaw lockingly engaging the anvil in the reverse mode and the second jaw slidingly engaging the anvil in the forward mode, the first jaw and the second jaw being non-symmetrical and transferring rotational motion of the hammer to the output shaft. 23. A rotary tool operable in a forward mode and a reverse mode, the rotary tool comprising:a housing having a forward end and supporting a motor, the motor having a motor shaft extending axially through the housing and defining an axis; a frame coupled to the motor shaft and being rotatable relative to the housing about the axis in response to rotation of the motor shaft; a hammer pivotably coupled to the frame and defining a central aperture, the hammer having a first jaw and a second jaw extending into the central aperture; and an output shaft supported in the forward end of the housing and being rotatable about the axis, the output shaft having an anvil having a substantially arcuate leading face and an angled trailing face and extending axially through the central aperture, the first jaw lockingly engaging the anvil in the reverse mode and the second jaw slidingly engaging the anvil in the forward mode, the first jaw and the second jaw transferring rotational motion of the hammer to the output shaft. 24. A rotary tool operable in a forward mode and a reverse mode, the rotary tool comprising:a housing having a forward end and supporting a motor, the motor having a motor shaft extending axially through the housing and defining an axis about which the motor shaft rotates in one of a forward direction and a reverse direction; a frame coupled to the motor shaft and being rotatable relative to the housing about the axis in response to rotation of the motor shaft; a hammer pivotably coupled to the frame and defining a central aperture, the hammer having a first jaw and a second jaw extending into the central aperture, the first jaw having a reverse engaging surface, the second jaw having a forward engaging surface, the reverse engaging surface defining a reverse angle, the forward engaging surface defining a forward angle, the reverse angle being greater than the forward angle; and an output shaft supported in the forward end of the housing and being rotatable about the axis, the output shaft having an anvil extending axially through the central aperture, the forward engaging surface contacting the anvil when the motor shaft is rotated in the forward direction and the reverse engaging surface contacting the anvil when the motor shaft is rotated in the reverse direction. 25. The rotary tool of claim 24, wherein the hammer is operable to transfer a first rotational force from the motor to the output shaft when the motor shaft is rotated in the reverse direction and a second rotational force from the motor to the output shaft when the motor shaft is rotated in the forward direction, the first force being greater than the second force.26. The rotary tool of claim 24, wherein the first jaw lockingly engages the trailing face when the motor shaft is rotated in the reverse direction and, the second jaw slidingly engages the leading face when the motor shaft is rotated in the forward direction.27. The rotary tool of claim 24, wherein the first and second jaws are non-symmetrical.