The present invention relates to power tools, and more particularly to powered threaded rod cutters.
Powered threaded rod cutters are used to cut threaded rods. During operation, a rod may be positioned at an angle relative to cutting dies of the cutter, thereby resulting in a slanted cut of the rod. During such instances, various components of the cutter, such as the cutting dies, may be jammed or damaged.
The present invention provides, in one aspect, a powered threaded rod cutter configured to perform a cutting operation on a threaded rod, including a first cutting die and a second cutting die, at least the first cutting die including a recess in which a first portion of the threaded rod is at least partly receivable, an electric motor, a planetary transmission positioned downstream of the electric motor, a drivetrain for converting a rotational output of the planetary transmission to a pivoting movement of the second cutting die, and a guide against which a second portion of the threaded rod may contact to support the threaded rod to be perpendicular relative to the second cutting die prior to the cutting operation.
Optionally, the guide is pivotable in unison with the second cutting die.
Optionally, the guide disengages the threaded rod prior to the second cutting die contacting the threaded rod.
Optionally, the drivetrain includes an arm pivotably coupled to the planetary transmission, and a shaft extending through the arm and defining a pivot axis. The arm is configured to pivot about the pivot axis.
Optionally, the arm includes a roller, and a mount coupled to the second cutting die.
Optionally, the drivetrain further includes a bracket coupled to the arm.
Optionally, the guide is coupled to the bracket. The guide is pivotable in unison with the bracket and the arm about the pivot axis.
Optionally, the guide includes a hub portion mounted to the shaft and a lobe portion radially extending from the hub portion. The second portion of the threaded rod is engageable with the lobe portion of the guide.
Optionally, the lobe portion of the guide includes a planar edge that is tangent to the recess in the first cutting die prior to the cutting operation. The second portion of the threaded rod is engageable with the planar edge prior to the cutting operation.
The present invention provides, in another aspect, a powered threaded rod cutter configured to perform a cutting operation on a threaded rod, including a first cutting die including a recess in which a first portion of the threaded rod is at least partly receivable, a second cutting die movable relative to the first cutting die, an electric motor, a planetary transmission positioned downstream of the electric motor, a drivetrain for converting a rotational output of the planetary transmission to a pivoting movement of the second cutting die, wherein the drivetrain includes an arm coupled to the second cutting die, and a shaft extending through the arm and defining a pivot axis, wherein the arm is configured to pivot about the pivot axis, and a guide coupled to the arm and configured to engage a second portion of the threaded rod to support the threaded rod to be perpendicular relative to the second cutting die prior to the cutting operation, wherein the guide is pivotable in unison with the arm and the second cutting die about the pivot axis.
Optionally, the powered threaded rod cutter further comprises a cam configured to receive torque from the planetary transmission when the electric motor is activated, wherein the arm is pivoted in response to being driven by the cam, and a roller in contact with the cam.
Optionally, the cam is rotatable from an initial position in a first direction. In response, the roller moves away from an axis of the cam, thereby causing the arm and the guide to pivot about the pivot axis in the first direction, and the second cutting die to pivot toward the first cutting die, closing a gap between the first cutting die and the second cutting die.
Optionally, in response to the arm and the guide pivoting about the pivot axis in the first direction, the guide disengages the threaded rod.
Optionally, in response to the cam continuing to rotate, the roller disengages a surface of the cam, thereby causing the arm and the guide to pivot in a second direction, reopening the gap between the first cutting die and the second cutting die.
Optionally, in response to the cam reaching the initial position, the electric motor is deactivated.
Optionally, the drivetrain further includes a bracket coupled to the arm.
Optionally, the guide is coupled to the bracket. The guide is pivotable in unison with the bracket and the arm about the pivot axis.
Optionally, the guide includes a hub portion mounted to the shaft and a lobe portion radially extending from the hub portion. The second portion of the threaded rod is engageable with the lobe portion of the guide.
Optionally, the lobe portion of the guide includes a planar edge that is tangent to the recess in the first cutting die prior to the cutting operation. The second portion of the threaded rod is engageable with the planar edge prior to the cutting operation.
The present invention provides, in yet another aspect, a powered threaded rod cutter configured to perform a cutting operation on a threaded rod, including a first cutting die including a recess in which a first portion of the threaded rod is at least partly receivable, a second cutting die movable relative to the first cutting die, an electric motor, a planetary transmission positioned downstream of the electric motor, a drivetrain for converting a rotational output of the planetary transmission to a pivoting movement of the second cutting die, wherein the drivetrain includes an arm coupled to the second cutting die, a shaft extending through the arm and defining a pivot axis, wherein the arm is configured to pivot about the pivot axis, and a guide coupled to the arm and including a hub portion mounted to the shaft and a lobe portion radially extending from the hub portion, wherein the lobe portion of the guide includes a planar edge that is tangent to the recess in the first cutting die prior to the cutting operation, and wherein a second portion of the threaded rod is engageable with the planar edge to support the threaded rod to be perpendicular relative to the second cutting die prior to the cutting operation.
Other features and aspects of the invention will become apparent by consideration of the following detailed description and accompanying drawings. Any feature(s) described herein in relation to one aspect or embodiment may be combined with any other feature(s) described herein in relation to any other aspect or embodiment as appropriate and applicable.
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
With reference to
The cutter 10 includes an electric motor 22 (
The clutch mechanism 34 includes a spring (e.g., a torsion spring 38) having one end 42 secured to a transmission housing 46 and an opposite end 50 secured to the second-stage ring gear 54 of the transmission 26, which is also a component of the clutch mechanism 34 (
As shown in
A bracket 80 is positioned on the shaft 76 and is coupled to the follower arm 70 via a fastener 84. More specifically, the bracket 80 includes an aperture 88 shaped and sized to receive the shaft 76, such that the bracket 80 is pivotable with the follower arm 70 about the pivot axis 74 relative to the shaft 76. The bracket 80 further includes a curved notch 92. An alignment guide 96 is positioned on the shaft 76 between the bracket 80 and an edge 100 of the follower arm 70. A first retaining ring 104 is seated on the shaft 76 between the bracket 80 and a distal end 76a of the shaft 76, and a second retaining ring 108 is seated on the shaft 76 between the edge 100 of the follower arm 70 and the alignment guide 96, thus axially affixing the alignment guide 96 to the shaft 76 (
The alignment guide 96 is coupled to the bracket 80 via a fastener 112 (
The user positions the rod 132 between the stationary die 14 and the movable die 18 prior to a rod cutting operation. The alignment guide 96 guides the rod 132 such that it rests against the planar edge 128 of the alignment guide 96 and within the recess 20 in the stationary die 14, preventing the rod 132 from being misaligned relative to the dies 14, 18, which may otherwise result in a slanted cut. When the user pulls the trigger of the cutter 10, the movable die 18 is moved toward the stationary die 14. Just prior to the movable die 18 coming into contact with the rod 132, the alignment guide 96 pivots with the bracket 80 and the follower arm 70 in a direction away from the stationary die 14. After the cut is completed (coinciding with release of the trigger), the movable die 18 cycles away from the stationary die 14 to a home position, at which time the motor 22 automatically stops. As the movable die 18 cycles away from the stationary die 14, the alignment guide 96 pivots with the bracket 80 and the follower arm 70, in a direction toward the stationary die 14. Specifically, in the sequence shown in
Various features of the invention are set forth in the claims.
Number | Date | Country | Kind |
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202022805925.7 | Nov 2020 | CN | national |
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