Power tools
First Claim
Patent Images
1. A power tool comprising:
- a drive unit having a housing and a spindle and configured to rotatably drive the spindle, the spindle being configured to be able to attach a tool bit used for machining a workpiece, the housing having an outer circumferential surface; and
a base configured to be placed on the workpiece, the base having a base plate configured to contact the workpiece and a tubular holding portion extending from the base plate and positioned to be opposed to the outer circumferential surface of the housing;
a relative position adjusting mechanism configured to adjust a position of the drive unit relative to the base; and
a relative position fixing mechanism configured to fix a position of the drive unit relative to the base,wherein;
at least one member is used commonly between the relative position adjusting mechanism and the relative position fixing mechanism, the at least one member including a support shaft member mounted to the tubular holding portion of the base and extending in a tangential direction of the tubular holding portion;
the relative position adjusting mechanism includes the support shaft member and a rotational member mounted on the support shaft member;
the rotational member is configured to rotate along the outer circumferential surface of the housing in a direction parallel to a central axis of the drive unit, so that the position of the drive unit relative to the base changes as the rotational member rotates along the outer circumferential surface of the housing;
the support shaft member has a first end portion and a second end portion opposite to the first end portion with respect to an axial direction;
the first end portion of the support shaft member is rotatably supported by a first part of the tubular holding portion of the base;
the second end portion of the support shaft member is rotatably supported by a second part of the tubular holding portion of the base, the second part being spaced from the first part in a circumferential direction of the tubular holding portion;
the relative position fixing mechanism includes the support shaft member and is configured to be able to move the support shaft member in the axial direction, so that the first part and the second part move toward each other to reduce a circumferential length of the tubular support portion for tightening the tubular holding portion around the outer circumferential surface of the housing;
the relative position fixing mechanism further includes a shift mechanism for moving the support shaft member in the axial direction;
the shift mechanism corn rises a cam portion rotatable about a rotational axis and an operation lever portion extending from the cam portion in a radial direction with respect to the rotational axis of the cam portion;
the cam portion acts on the support shaft member to move the support shaft member in the axial direction according to the rotational position of the cam portion;
the operation lever portion is operable for rotating the cam portion; and
the operation lever portion is configured to rotate about the rotational axis within a plane perpendicular to an axial direction of the tubular holding portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A power tool includes a base and a drive unit movable relative to the base and having a spindle and a drive device for rotatably driving the spindle. The power tool further includes a movable member mounted to the base and movable in a first mode and a second mode. A first device is coupled between the movable member and the drive unit and moves the drive unit relative to the base when the movable member moves in the first mode. A second device is coupled to the movable member and is configured to fix the drive unit in position relative to the base when the movable member moves in the second mode.
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Citations
18 Claims
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1. A power tool comprising:
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a drive unit having a housing and a spindle and configured to rotatably drive the spindle, the spindle being configured to be able to attach a tool bit used for machining a workpiece, the housing having an outer circumferential surface; and a base configured to be placed on the workpiece, the base having a base plate configured to contact the workpiece and a tubular holding portion extending from the base plate and positioned to be opposed to the outer circumferential surface of the housing; a relative position adjusting mechanism configured to adjust a position of the drive unit relative to the base; and a relative position fixing mechanism configured to fix a position of the drive unit relative to the base, wherein; at least one member is used commonly between the relative position adjusting mechanism and the relative position fixing mechanism, the at least one member including a support shaft member mounted to the tubular holding portion of the base and extending in a tangential direction of the tubular holding portion; the relative position adjusting mechanism includes the support shaft member and a rotational member mounted on the support shaft member; the rotational member is configured to rotate along the outer circumferential surface of the housing in a direction parallel to a central axis of the drive unit, so that the position of the drive unit relative to the base changes as the rotational member rotates along the outer circumferential surface of the housing; the support shaft member has a first end portion and a second end portion opposite to the first end portion with respect to an axial direction; the first end portion of the support shaft member is rotatably supported by a first part of the tubular holding portion of the base; the second end portion of the support shaft member is rotatably supported by a second part of the tubular holding portion of the base, the second part being spaced from the first part in a circumferential direction of the tubular holding portion; the relative position fixing mechanism includes the support shaft member and is configured to be able to move the support shaft member in the axial direction, so that the first part and the second part move toward each other to reduce a circumferential length of the tubular support portion for tightening the tubular holding portion around the outer circumferential surface of the housing; the relative position fixing mechanism further includes a shift mechanism for moving the support shaft member in the axial direction; the shift mechanism corn rises a cam portion rotatable about a rotational axis and an operation lever portion extending from the cam portion in a radial direction with respect to the rotational axis of the cam portion; the cam portion acts on the support shaft member to move the support shaft member in the axial direction according to the rotational position of the cam portion; the operation lever portion is operable for rotating the cam portion; and the operation lever portion is configured to rotate about the rotational axis within a plane perpendicular to an axial direction of the tubular holding portion. - View Dependent Claims (2, 3, 4, 9, 10, 11, 12, 13)
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5. A power tool comprising:
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a base; a drive unit movable relative to the base and having a spindle and a drive device for rotatably driving the spindle; a movable member mounted to the base and movable in a first mode and a second mode; a first device coupled between the movable member and the drive unit and moving the drive unit relative to the base when the movable member moves in the first mode; and a second device coupled to the movable member and configured to fix the drive unit in position relative to the base when the movable member moves in the second mode, wherein; the first mode of movement of the movable member is a rotational movement; the second mode of movement of the movable member is a linear movement; the movable member is a shaft member having an axis, the shaft member rotating about the axis in the first mode and moving in an axial direction in the second mode; the second device further comprises a shift mechanism for moving the shaft member in the axial direction; the shift mechanism comprises a cam portion rotatable about a rotational axis and an operation lever portion extending from the cam portion in a radial direction with respect to the rotational axis of the cam portion; the cam portion acts on the shaft member to move the shaft member in the axial direction according to the rotational position of the cam portion; the operation lever portion is operable for rotating the cam portion; and the operation lever portion is configured to rotate about the rotational axis within a plane perpendicular to a moving direction of the drive unit relative to the base. - View Dependent Claims (6, 7, 8, 14, 15, 16, 17, 18)
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Specification