US20010013266A1 - Tool extender and tool assembly - Google Patents

Tool extender and tool assembly Download PDF

Info

Publication number
US20010013266A1
US20010013266A1 US09/735,486 US73548600A US2001013266A1 US 20010013266 A1 US20010013266 A1 US 20010013266A1 US 73548600 A US73548600 A US 73548600A US 2001013266 A1 US2001013266 A1 US 2001013266A1
Authority
US
United States
Prior art keywords
tool
guide portion
extender
shank
set forth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US09/735,486
Other versions
US6382885B2 (en
Inventor
Anders Isaksson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik Intellectual Property AB
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to SANDVIK AB reassignment SANDVIK AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ISAKSSON, ANDERS
Publication of US20010013266A1 publication Critical patent/US20010013266A1/en
Application granted granted Critical
Publication of US6382885B2 publication Critical patent/US6382885B2/en
Assigned to SANDVIK INTELLECTUAL PROPERTY HB reassignment SANDVIK INTELLECTUAL PROPERTY HB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SANDVIK AB
Assigned to SANDVIK INTELLECTUAL PROPERTY AKTIEBOLAG reassignment SANDVIK INTELLECTUAL PROPERTY AKTIEBOLAG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SANDVIK INTELLECTUAL PROPERTY HB
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/12—Adapters for drills or chucks; Tapered sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/12—Adapters for drills or chucks; Tapered sleeves
    • B23B51/126—Tool elongating devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/34—Accessory or component
    • Y10T279/3406—Adapter
    • Y10T279/3418—Adapter for particular tool or workpiece
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/94—Tool-support
    • Y10T408/95—Tool-support with tool-retaining means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/94—Tool-support
    • Y10T408/95—Tool-support with tool-retaining means
    • Y10T408/957—Tool adapter

Definitions

  • the present invention relates to a tool extender and tool assembly and, more particularly, to a tool extender and tool assembly having guides for enhancing stability of the tool relative to the tool extender.
  • U.S. Pat. No. 756,377 discloses a chuck for rock drilling machines that has an internally threaded, tapered hole that receives a split nut that can secure a tool bit when threaded into the chuck.
  • a disadvantage to the type of device disclosed in U.S. Pat. No. 756,377 is that forces on the tool bit may be transmitted through the split nut to the threads and damage the threads, requiring replacement of the split nut and the chuck.
  • Adjustable chucks are common today, and typically are capable of clamping a range of different diameter tool bit shanks. Certain adjustable chucks are not, however, ideally suited for clamping all shanks. For example, Sandvik AB, Sandviken, Sweden, produces CAPTO tools in which a polygonal chuck opening is ideally suited for clamping polygonal shanks. Tool bits that have customary cylindrical shanks do not fully enjoy the advantages of the CAPTO system. It is desirable to provide tool users with an alternative to replacing all of their tools for use with new toolholder systems.
  • the present invention permits tool users to use existing tool supplies with new toolholder systems. Moreover, the present invention permits tools to be secured relative to chucks in an accurate fashion that minimizes the possibility of the tools being misaligned relative to an axis of rotation of the tools. Further, the present invention permits use of tools having threads with toolholders having threads that minimizes the potential for damage to the threads.
  • a tool extender and tool assembly includes a first and a second end, a working portion for performing an operation on a workpiece being provided at the first end and a shank extending from the working portion to the second end.
  • the shank includes a bushing, a first guide portion, an externally threaded portion, and a second guide portion arranged successively in a direction away from the working portion.
  • the tool extender includes a first end and a second end.
  • the tool extender includes a substantially cylindrical bore in which the shank is receivable up to the bushing, the bushing abutting against a forward edge of the tool extender at the first end.
  • the bore includes a first internal guide portion, an internally threaded portion for mating with the externally threaded portion, and a second internal guide portion arranged successively in a direction toward the second end of the tool extender.
  • the tool and the tool extender are shaped such that, when the bushing abuts against the forward edge of the tool extender and the internally threaded portion and the externally threaded portion are mated, the first guide portion and the second guide portion are disposed adjacent the first internal guide portion and the second internal guide portion of the bore.
  • FIG. 1A is a side, partially cross-sectional view of a tool extender and tool assembly according to an embodiment of the present invention
  • FIG. 1B is a side, cross-sectional view of the tool extender of FIG. 1A;
  • FIG. 1C is a side view of the tool of FIG. 1A;
  • FIG. 2A is a side, partially cross-sectional view of a tool extender and tool assembly according to another embodiment of the present invention.
  • FIG. 2B is a side, cross-sectional view of the tool extender of FIG. 2A.
  • FIG. 2C is a side view of the tool of FIG. 2A.
  • FIG. 1A An assembly comprising a tool extender 21 and tool 23 according to an embodiment of the present invention is shown in FIG. 1A.
  • FIGS. 1B and 1C show the tool extender 21 and the tool, respectively.
  • the tool 23 includes a first and a second end, 25 and 27 , respectively.
  • a working portion 29 for performing an operation on a workpiece is provided at the first end 25 of the tool, and a shank 31 extends from the working portion to the second end 27 .
  • the shank 31 includes a bushing 33 , a first guide portion 35 , an externally threaded portion 37 , and a second guide portion 39 arranged successively in a direction away from the working portion 29 toward the second end 27 of the tool 23 .
  • the tool 23 is preferably a rotating tool, such as a drilling or a milling tool.
  • the tool extender 21 also includes a first end 41 and a second end 43 .
  • the tool extender 21 is preferably at least partially tubular and preferably includes a substantially cylindrical bore 45 in which the shank 31 is receivable up to the bushing 33 .
  • the bushing 33 abuts against a forward edge 47 of the tool extender 21 at the first end 41 of the tool extender.
  • the bore 45 includes a first internal guide portion 49 , an internally threaded portion 51 for mating with the externally threaded portion 37 , and a second internal guide portion 53 arranged successively in a direction toward the second end 43 of the tool extender 21 .
  • the tool extender 23 is preferably adapted to be secured in the chuck of a machine such as a drill or a mill and may have any suitable configuration for the securement at the second end 43 of the tool extender.
  • the second end 43 may be suitable for attachment in a particular chuck which will not accept the second end 27 of the tool 23 or for which the second end of the tool is not as ideally configured as the second end of the tool extender.
  • the tool extender 21 and tool 23 assembly according to the present invention eliminates a need to replace a collection of otherwise usable tools when, for example, a drill press usable with the tools is replaced with a new drill press that has a different style of chuck.
  • the tool 23 and the tool extender 21 are shaped such that, when the bushing 33 abuts against the forward edge 47 of the tool extender and the internally threaded portion 51 and the externally threaded portion 37 are mated, the first guide portion 35 and the second guide portion 39 are disposed adjacent the first internal guide portion 49 and the second internal guide portion 53 of the bore 45 .
  • the external diameters of the first and second guide portions 35 and 39 are preferably substantially the same as or slightly smaller than the internal diameters of the first and second internal guide portions 49 and 53 , respectively, so that the first and second guide portions are axially and rotatably movable relative to the first and second internal guide portions, but with minimal play.
  • the bushing 33 is preferably spaced on the shank 31 relative to the externally threaded portion 37 such that, when the bushing abuts against the forward edge 47 of the tool extender 21 , the externally threaded portion is not completely threaded into the bottom of the internally threaded portion 51 of the tool extender. In this way, the possibility of damage to the threads by overtightening of the tool 23 relative to the tool extender 21 is minimized.
  • the internally threaded portion 51 and the externally threaded portion 37 are preferably threaded in a direction opposite an intended direction of rotation of the tool 23 during operation so that, when the tool and tool extender 23 assembly is in use, the turning action of the tool will tend to tighten the tool relative to the tool extender, rather than loosen it.
  • first and second guide portions 35 and 39 together with the first and second internal guide portions 49 and 53 according to the present invention, it is possible to provide a high degree of support to the tool 23 in the tool extender 21 . Moreover, the assembly according to the present invention minimizes the possibility of improper axial alignment of the tool relative to the tool extender or damage to the threads due to forces on the working portion 29 . In an ordinary tool extender without features of the present invention such as the second guide portion and the second internal guide portion, forces on the working portion would be opposed largely by the threads, risking damage to the tool extender and the tool.
  • first guide portion 35 and the second guide portion 39 are illustrated as being circularly cylindrical.
  • first internal guide portion 49 and the second internal guide portion 53 are illustrated as being circularly cylindrical.
  • conical first and second guide portions 35 ′ and 39 ′ and conical first and second internal guide portions 49 ′ and 53 ′ may be used with cylindrical internal guide portions
  • cylindrical internal guide portions may be used with conical guide portions
  • the guide portions are preferably circular in cross-section so that a maximum surface area of the guide portions can contact a maximum surface area of the internal guide portions.
  • the guide portions or the internal guide portions can be other than circular in cross-section or circular, provided that they are shaped so that rotation of the tool 23 relative to the tool extender 21 is possible, such that there is merely line or point contact between the guide portions and the internal guide portions.
  • the guide portions may be square or elliptical, and the internal guide portions may be circular but have a sufficient diameter to permit rotation of the guide portions relative to the internal guide portions.
  • a portion 55 of the shank 31 between the externally threaded portion 37 and a first end 57 of the second guide portion 39 closest to the first end 25 of the tool 23 is of a smaller diameter than the first end of the second guide portion.
  • a portion 59 of the bore 45 between the internally threaded portion 51 and a first end 61 of the second internal guide portion 53 closest to the first end 41 of the tool extender 21 is of an equal diameter to the first end of the second internal guide portion.
  • the portion 59 of the bore 45 between the internally threaded portion 51 and the first end 61 of the second internal guide portion 53 closest to the first end 41 of the tool extender 21 will be of a lesser diameter than the internally threaded portion, and the second guide portion 39 will also be of a lesser diameter than the internally threaded portion so that the second guide portion can be slid past the internally threaded portion during installation of the tool 23 .
  • FIGS. 2 A- 2 C show another embodiment of the present invention wherein the tool extender 121 and tool 123 are substantially the same as the tool extender 21 and the tool 23 , except that a portion 155 of the shank 131 between the externally threaded portion 137 and a first end 157 of the second guide portion 139 closest to the first end 125 of the tool is of equal diameter to the first end of the second guide portion.
  • the portion 159 of the bore 145 between the internally threaded portion 151 and a first end 161 of the second internal guide portion 153 closest to the first end 141 of the tool extender 121 is of an equal diameter to or greater diameter than the first end 157 of the second internal guide portion 153 .
  • the first and second guide portions preferably enter the corresponding first and second internal guide portions before the external threads enter the internal threads.
  • the bushing is preferably disposed relative to the threads so that the external threads do not reach a bottom point of the internal threads.
  • the diameter of the second guide portion must be as small or smaller than the diameter of the threaded portion, and the diameter of the threaded portion must be as small or smaller than the diameter of the first guide portion.
  • the bushing 33 may be lockable and unlockable relative to the shank 31 , such as by set screws 63 and, when in an unlocked condition relative to the shank, the bushing may be axially movable relative to the shank. In this way, a depth of installation of the tool 23 into the tool extender 21 may be adjustable.
  • the bushing 33 , the first guide portion 35 , and the externally threaded portion 37 may be lockable and unlockable relative to the shank 31 and, when in an unlocked condition relative to the shank, the bushing, the first guide portion, and the externally threaded portion may be axially movable relative to the shank. Again, such an arrangement will permit adjusting a depth of installation of the tool 23 into the tool extender 21 .
  • the bushing 33 , the first guide portion 35 , and the externally threaded portion 37 may be connected to one another, such as by comprising a sleeve portion that is axially movable along a cylindrical shank 31 .
  • the second guide portion 39 may also be lockable and unlockable relative to the shank 31 and, when in an unlocked condition relative to the shank, the second guide portion may be axially movable relative to the shank.
  • the tool extender and tool assembly permits extending a length from chuck to working portion of the tool while providing a high degree of support to the tool and minimizing the possibility of misalignment of the tool and damage to the tool or the tool extender. It is possible, using the present invention, to replace worn tools in a simple fashion, without also having to replace the tool extender.
  • the invention can also be used in connection with existing tools by attaching appropriate bushings and other components onto existing shanks, thereby avoiding the need for completely replacing, for example, large collections of drill bits.

Abstract

A tool extender and tool assembly is provided. The tool includes a first and a second end, a working portion for performing an operation on a workpiece being provided at the first end and a shank extending from the working portion to the second end. The shank includes a bushing, a first guide portion, an externally threaded portion, and a second guide portion arranged successively in a direction away from the working portion. The tool extender includes a first end and a second end. The tool extender includes a substantially cylindrical bore in which the shank is receivable up to the bushing, the bushing abutting against a forward edge of the tool extender at the first end. The bore includes a first internal guide portion, an internally threaded portion for mating with the externally threaded portion, and a second internal guide portion arranged successively in a direction toward the second end of the tool extender. The tool and the tool extender are shaped such that, when the bushing abuts against the forward edge of the tool extender and the internally threaded portion and the externally threaded portion are mated, the first guide portion and the second guide portion are disposed adjacent the first internal guide portion and the second internal guide portion of the bore.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a tool extender and tool assembly and, more particularly, to a tool extender and tool assembly having guides for enhancing stability of the tool relative to the tool extender. [0001]
    • BACKGROUND AND SUMMARY
  • One technique for securing tool bits such as drill bits or milling inserts, such as ball nose end mill inserts, to chucks of drill presses or milling machines is to provide an internally threaded chuck and an externally threaded tool bit that mates with the internal thread of the chuck. U.S. Pat. No. 756,377 discloses a chuck for rock drilling machines that has an internally threaded, tapered hole that receives a split nut that can secure a tool bit when threaded into the chuck. A disadvantage to the type of device disclosed in U.S. Pat. No. 756,377 is that forces on the tool bit may be transmitted through the split nut to the threads and damage the threads, requiring replacement of the split nut and the chuck. [0002]
  • Adjustable chucks are common today, and typically are capable of clamping a range of different diameter tool bit shanks. Certain adjustable chucks are not, however, ideally suited for clamping all shanks. For example, Sandvik AB, Sandviken, Sweden, produces CAPTO tools in which a polygonal chuck opening is ideally suited for clamping polygonal shanks. Tool bits that have customary cylindrical shanks do not fully enjoy the advantages of the CAPTO system. It is desirable to provide tool users with an alternative to replacing all of their tools for use with new toolholder systems. [0003]
  • The present invention permits tool users to use existing tool supplies with new toolholder systems. Moreover, the present invention permits tools to be secured relative to chucks in an accurate fashion that minimizes the possibility of the tools being misaligned relative to an axis of rotation of the tools. Further, the present invention permits use of tools having threads with toolholders having threads that minimizes the potential for damage to the threads. [0004]
  • According to an embodiment of the present invention, a tool extender and tool assembly is provided. The tool includes a first and a second end, a working portion for performing an operation on a workpiece being provided at the first end and a shank extending from the working portion to the second end. The shank includes a bushing, a first guide portion, an externally threaded portion, and a second guide portion arranged successively in a direction away from the working portion. The tool extender includes a first end and a second end. The tool extender includes a substantially cylindrical bore in which the shank is receivable up to the bushing, the bushing abutting against a forward edge of the tool extender at the first end. The bore includes a first internal guide portion, an internally threaded portion for mating with the externally threaded portion, and a second internal guide portion arranged successively in a direction toward the second end of the tool extender. The tool and the tool extender are shaped such that, when the bushing abuts against the forward edge of the tool extender and the internally threaded portion and the externally threaded portion are mated, the first guide portion and the second guide portion are disposed adjacent the first internal guide portion and the second internal guide portion of the bore. [0005]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The features and advantages of the present invention are well understood by reading the following detailed description in conjunction with the drawings in which like numerals indicate similar elements and in which: [0006]
  • FIG. 1A is a side, partially cross-sectional view of a tool extender and tool assembly according to an embodiment of the present invention; [0007]
  • FIG. 1B is a side, cross-sectional view of the tool extender of FIG. 1A; [0008]
  • FIG. 1C is a side view of the tool of FIG. 1A; [0009]
  • FIG. 2A is a side, partially cross-sectional view of a tool extender and tool assembly according to another embodiment of the present invention; [0010]
  • FIG. 2B is a side, cross-sectional view of the tool extender of FIG. 2A; and [0011]
  • FIG. 2C is a side view of the tool of FIG. 2A. [0012]
    • DETAILED DESCRIPTION
  • An assembly comprising a [0013] tool extender 21 and tool 23 according to an embodiment of the present invention is shown in FIG. 1A. FIGS. 1B and 1C show the tool extender 21 and the tool, respectively. The tool 23 includes a first and a second end, 25 and 27, respectively. A working portion 29 for performing an operation on a workpiece is provided at the first end 25 of the tool, and a shank 31 extends from the working portion to the second end 27. The shank 31 includes a bushing 33, a first guide portion 35, an externally threaded portion 37, and a second guide portion 39 arranged successively in a direction away from the working portion 29 toward the second end 27 of the tool 23. The tool 23 is preferably a rotating tool, such as a drilling or a milling tool.
  • The [0014] tool extender 21, or tool adaptor, also includes a first end 41 and a second end 43. The tool extender 21 is preferably at least partially tubular and preferably includes a substantially cylindrical bore 45 in which the shank 31 is receivable up to the bushing 33. The bushing 33 abuts against a forward edge 47 of the tool extender 21 at the first end 41 of the tool extender. The bore 45 includes a first internal guide portion 49, an internally threaded portion 51 for mating with the externally threaded portion 37, and a second internal guide portion 53 arranged successively in a direction toward the second end 43 of the tool extender 21. The tool extender 23 is preferably adapted to be secured in the chuck of a machine such as a drill or a mill and may have any suitable configuration for the securement at the second end 43 of the tool extender. For example, the second end 43 may be suitable for attachment in a particular chuck which will not accept the second end 27 of the tool 23 or for which the second end of the tool is not as ideally configured as the second end of the tool extender. The tool extender 21 and tool 23 assembly according to the present invention eliminates a need to replace a collection of otherwise usable tools when, for example, a drill press usable with the tools is replaced with a new drill press that has a different style of chuck.
  • The [0015] tool 23 and the tool extender 21 are shaped such that, when the bushing 33 abuts against the forward edge 47 of the tool extender and the internally threaded portion 51 and the externally threaded portion 37 are mated, the first guide portion 35 and the second guide portion 39 are disposed adjacent the first internal guide portion 49 and the second internal guide portion 53 of the bore 45. The external diameters of the first and second guide portions 35 and 39 are preferably substantially the same as or slightly smaller than the internal diameters of the first and second internal guide portions 49 and 53, respectively, so that the first and second guide portions are axially and rotatably movable relative to the first and second internal guide portions, but with minimal play.
  • The [0016] bushing 33 is preferably spaced on the shank 31 relative to the externally threaded portion 37 such that, when the bushing abuts against the forward edge 47 of the tool extender 21, the externally threaded portion is not completely threaded into the bottom of the internally threaded portion 51 of the tool extender. In this way, the possibility of damage to the threads by overtightening of the tool 23 relative to the tool extender 21 is minimized. The internally threaded portion 51 and the externally threaded portion 37 are preferably threaded in a direction opposite an intended direction of rotation of the tool 23 during operation so that, when the tool and tool extender 23 assembly is in use, the turning action of the tool will tend to tighten the tool relative to the tool extender, rather than loosen it.
  • By providing the first and [0017] second guide portions 35 and 39 together with the first and second internal guide portions 49 and 53 according to the present invention, it is possible to provide a high degree of support to the tool 23 in the tool extender 21. Moreover, the assembly according to the present invention minimizes the possibility of improper axial alignment of the tool relative to the tool extender or damage to the threads due to forces on the working portion 29. In an ordinary tool extender without features of the present invention such as the second guide portion and the second internal guide portion, forces on the working portion would be opposed largely by the threads, risking damage to the tool extender and the tool.
  • The [0018] first guide portion 35 and the second guide portion 39 are illustrated as being circularly cylindrical. Similarly, the first internal guide portion 49 and the second internal guide portion 53 are illustrated as being circularly cylindrical. It is also possible to provide conical first and second guide portions 35′ and 39′ and conical first and second internal guide portions 49′ and 53′, as illustrated by dotted lines in FIG. 1. If desired or necessary, conical internal guide portions may be used with cylindrical internal guide portions, and cylindrical internal guide portions may be used with conical guide portions However, it is presently preferred for cylindrical guide portions to be used with cylindrical internal guide portions and conical guide portions to be used with conical internal guide portions so that the maximum area of the guide portions and the internal guide portions are adjacent to each other and provide the greatest support against forces on the tool 23.
  • The guide portions are preferably circular in cross-section so that a maximum surface area of the guide portions can contact a maximum surface area of the internal guide portions. If desired or necessary, the guide portions or the internal guide portions can be other than circular in cross-section or circular, provided that they are shaped so that rotation of the [0019] tool 23 relative to the tool extender 21 is possible, such that there is merely line or point contact between the guide portions and the internal guide portions. For example, the guide portions may be square or elliptical, and the internal guide portions may be circular but have a sufficient diameter to permit rotation of the guide portions relative to the internal guide portions.
  • In the embodiment shown in FIGS. [0020] 1A-1C, a portion 55 of the shank 31 between the externally threaded portion 37 and a first end 57 of the second guide portion 39 closest to the first end 25 of the tool 23 is of a smaller diameter than the first end of the second guide portion. A portion 59 of the bore 45 between the internally threaded portion 51 and a first end 61 of the second internal guide portion 53 closest to the first end 41 of the tool extender 21 is of an equal diameter to the first end of the second internal guide portion. The portion 59 of the bore 45 between the internally threaded portion 51 and the first end 61 of the second internal guide portion 53 closest to the first end 41 of the tool extender 21 will be of a lesser diameter than the internally threaded portion, and the second guide portion 39 will also be of a lesser diameter than the internally threaded portion so that the second guide portion can be slid past the internally threaded portion during installation of the tool 23.
  • FIGS. [0021] 2A-2C show another embodiment of the present invention wherein the tool extender 121 and tool 123 are substantially the same as the tool extender 21 and the tool 23, except that a portion 155 of the shank 131 between the externally threaded portion 137 and a first end 157 of the second guide portion 139 closest to the first end 125 of the tool is of equal diameter to the first end of the second guide portion. The portion 159 of the bore 145 between the internally threaded portion 151 and a first end 161 of the second internal guide portion 153 closest to the first end 141 of the tool extender 121 is of an equal diameter to or greater diameter than the first end 157 of the second internal guide portion 153.
  • In all of the embodiments of the present invention, upon installation of the tool into the tool extender, the first and second guide portions preferably enter the corresponding first and second internal guide portions before the external threads enter the internal threads. The bushing is preferably disposed relative to the threads so that the external threads do not reach a bottom point of the internal threads. The diameter of the second guide portion must be as small or smaller than the diameter of the threaded portion, and the diameter of the threaded portion must be as small or smaller than the diameter of the first guide portion. [0022]
  • With reference to FIGS. [0023] 1A-1C for purposes of discussion, if desired or necessary, the bushing 33 may be lockable and unlockable relative to the shank 31, such as by set screws 63 and, when in an unlocked condition relative to the shank, the bushing may be axially movable relative to the shank. In this way, a depth of installation of the tool 23 into the tool extender 21 may be adjustable. Similarly, if desired or necessary, the bushing 33, the first guide portion 35, and the externally threaded portion 37 may be lockable and unlockable relative to the shank 31 and, when in an unlocked condition relative to the shank, the bushing, the first guide portion, and the externally threaded portion may be axially movable relative to the shank. Again, such an arrangement will permit adjusting a depth of installation of the tool 23 into the tool extender 21. The bushing 33, the first guide portion 35, and the externally threaded portion 37 may be connected to one another, such as by comprising a sleeve portion that is axially movable along a cylindrical shank 31. Moreover, to further facilitate adjustment of the depth of installation of the tool extender or to modify a degree of support provided by the second guide portion, the second guide portion 39 may also be lockable and unlockable relative to the shank 31 and, when in an unlocked condition relative to the shank, the second guide portion may be axially movable relative to the shank.
  • It will be appreciated from the foregoing that the tool extender and tool assembly according to the present invention permits extending a length from chuck to working portion of the tool while providing a high degree of support to the tool and minimizing the possibility of misalignment of the tool and damage to the tool or the tool extender. It is possible, using the present invention, to replace worn tools in a simple fashion, without also having to replace the tool extender. The invention can also be used in connection with existing tools by attaching appropriate bushings and other components onto existing shanks, thereby avoiding the need for completely replacing, for example, large collections of drill bits. [0024]
  • While this invention has been illustrated and described in accordance with a preferred embodiment, it is recognized that variations and changes may be made therein without departing from the invention as set forth in the claims. [0025]

Claims (25)

What is claimed is:
1. A tool extender and tool assembly, comprising:
a tool including a first and a second end, a working portion for performing an operation on a workpiece being provided at the first end and a shank extending from the working portion to the second end, the shank including a bushing, a first guide portion, an externally threaded portion, and a second guide portion arranged successively in a direction away from the working portion;
a tool extender including a first end and a second end, the tool extender including a substantially cylindrical bore in which the shank is receivable up to the bushing, the bushing abutting against a forward edge of the tool extender at the first end, the bore including a first internal guide portion, an internally threaded portion for mating with the externally threaded portion, and a second internal guide portion arranged successively in a direction toward the second end of the tool extender; and
the tool and the tool extender being shaped such that, when the bushing abuts against the forward edge of the tool extender and the internally threaded portion and the externally threaded portion are mated, the first guide portion and the second guide portion are disposed adjacent the first internal guide portion and the second internal guide portion of the bore.
2. The tool extender and tool assembly as set forth in
claim 1
, wherein the second guide portion is circular in cross-section.
3. The tool extender and tool assembly as set forth in
claim 2
, wherein the second internal guide portion is circular.
4. The tool extender and tool assembly as set forth in
claim 2
, wherein the second internal guide portion is conical and decreases in diameter in a direction toward the second end of the tool extender.
5. The tool extender and tool assembly as set forth in
claim 1
, wherein the second guide portion is conical and decreases in diameter in a direction toward the second end of the tool.
6. The tool extender and tool assembly as set forth in
claim 5
, wherein the second internal guide portion is circular.
7. The tool extender and tool assembly as set forth in
claim 5
, wherein the second internal guide portion is conical and decreases in diameter in a direction toward the second end of the tool extender.
8. The tool extender and tool assembly as set forth in
claim 1
, wherein the first guide portion is circular in cross-section.
9. The tool extender and tool assembly as set forth in
claim 8
, wherein the first internal guide portion is circular.
10. The tool extender and tool assembly as set forth in
claim 8
, wherein the first internal guide portion is conical and decreases in diameter in a direction toward the second end of the tool extender.
11. The tool extender and tool assembly as set forth in
claim 1
, wherein the first guide portion is conical and decreases in diameter in a direction toward the second end of the tool.
12. The tool extender and tool assembly as set forth in
claim 11
, wherein the first internal guide portion is circular.
13. The tool extender and tool assembly as set forth in
claim 11
, wherein the first internal guide portion is conical and decreases in diameter in a direction toward the second end of the tool extender.
14. The tool extender and tool assembly as set forth in
claim 1
, wherein a portion of the shank between the externally threaded portion and a first end of the second guide portion closest to the first end of the tool is of a smaller diameter than the first end of the second guide portion.
15. The tool extender and tool assembly as set forth in
claim 14
, wherein a portion of the bore between the internally threaded portion and a first end of the second internal guide portion closest to the first end of the tool extender is of an equal diameter to the first end of the second internal guide portion.
16. The tool extender and tool assembly as set forth in
claim 1
, wherein a portion of the shank between the externally threaded portion and a first end of the second guide portion closest to the first end of the tool is of equal diameter to the first end of the second guide portion.
17. The tool extender and tool assembly as set forth in
claim 16
, wherein a portion of the bore between the internally threaded portion and a first end of the second internal guide portion closest to the first end of the tool extender is of a greater diameter than the first end of the second internal guide portion.
18. The tool extender and tool assembly as set forth in
claim 16
, wherein a portion of the bore between the internally threaded portion and a first end of the second internal guide portion closest to the first end of the tool extender is of an equal diameter to the first end of the second internal guide portion.
19. The tool extender and tool assembly as set forth in
claim 1
, wherein the internally threaded portion and the externally threaded portion are threaded in a direction opposite an intended direction of rotation of the tool.
20. The tool extender and tool assembly as set forth in
claim 1
, wherein the bushing is lockable and unlockable relative to the shank and, when in an unlocked condition relative to the shank, the bushing is axially movable relative to the shank.
21. The tool extender and tool assembly as set forth in
claim 20
, wherein the bushing, the first guide portion, and the externally threaded portion are lockable and unlockable relative to the shank and, when in an unlocked condition relative to the shank, the bushing, the first guide portion, and the externally threaded portion are axially movable relative to the shank.
22. The tool extender and tool assembly as set forth in
claim 21
, wherein the bushing, the first guide portion, and the externally threaded portion are connected to one another.
23. The tool extender and tool assembly as set forth in
claim 22
, wherein the second guide portion is lockable and unlockable relative to the shank and, when in an unlocked condition relative to the shank, the second guide portion is axially movable relative to the shank.
24. The tool extender and tool assembly as set forth in
claim 21
, wherein the second guide portion is lockable and unlockable relative to the shank and, when in an unlocked condition relative to the shank, the second guide portion is axially movable relative to the shank.
25. The tool extender and tool assembly as set forth in
claim 20
, wherein the second guide portion is lockable and unlockable relative to the shank and, when in an unlocked condition relative to the shank, the second guide portion is axially movable relative to the shank.
US09/735,486 1999-12-21 2000-12-14 Tool extender and tool assembly Expired - Lifetime US6382885B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9904708A SE519656C2 (en) 1999-12-21 1999-12-21 Tool extender and tool unit
SE9904708-6C 1999-12-21
SE9904708 1999-12-21

Publications (2)

Publication Number Publication Date
US20010013266A1 true US20010013266A1 (en) 2001-08-16
US6382885B2 US6382885B2 (en) 2002-05-07

Family

ID=20418240

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/735,486 Expired - Lifetime US6382885B2 (en) 1999-12-21 2000-12-14 Tool extender and tool assembly

Country Status (8)

Country Link
US (1) US6382885B2 (en)
EP (1) EP1239988B1 (en)
JP (1) JP2003517943A (en)
KR (1) KR20020064353A (en)
CN (1) CN1140372C (en)
DE (1) DE60012976T2 (en)
SE (1) SE519656C2 (en)
WO (1) WO2001045887A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1308229A1 (en) * 2001-11-01 2003-05-07 Big Alpha Co., Inc. Tool holder
FR2838072A1 (en) * 2002-04-04 2003-10-10 Fournel Device for adjusting tool on tool holder abuts tool tail on height adjustable stop rod during installation
US20090208903A1 (en) * 2004-06-21 2009-08-20 Straumann Holding Ag Method for manufacturing disposable rotary cutting tools and disposable rotary tool for dental or medical applications
WO2017025947A1 (en) * 2015-08-11 2017-02-16 Iscar Ltd. Replaceable cutting head having threaded mounting portion with two spaced apart conical abutment surfaces provided with the same cone angle, tool holder and rotary cutting tool

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6901825B1 (en) 2004-01-02 2005-06-07 Vicmar Solutions, Inc. E-Z shutter crank
US20080179841A1 (en) * 2007-01-25 2008-07-31 Tsai-Ching Chen Extension chuck tool
JP5003363B2 (en) * 2007-09-06 2012-08-15 マックス株式会社 Drilling tool
US9743987B2 (en) 2013-03-14 2017-08-29 Board Of Regents Of The University Of Nebraska Methods, systems, and devices relating to robotic surgical devices, end effectors, and controllers
CN104722814A (en) * 2013-12-18 2015-06-24 青岛金诺特种技术玻璃有限公司 Hole-drilling film-removing processing device for glass
US10722319B2 (en) 2016-12-14 2020-07-28 Virtual Incision Corporation Releasable attachment device for coupling to medical devices and related systems and methods
CN112692341A (en) * 2021-01-06 2021-04-23 上海钰工机电有限公司 Rod-like rotary cutting device

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US756377A (en) 1903-08-18 1904-04-05 Walter Edward Kimber Chuck for rock-drilling machines.
US3691883A (en) * 1970-09-22 1972-09-19 Maurice S Ingram Lathe tool holder
US3719367A (en) * 1971-09-01 1973-03-06 Houdaille Industries Inc Collet chuck for threaded shank tools
US3970406A (en) * 1974-11-15 1976-07-20 Burr-Ban Tool Service Company Tool holder with misalignment compensating means
US4602798A (en) * 1984-04-23 1986-07-29 James Wettstein Collet arbor for application to turning and milling procedures
DE8902134U1 (en) * 1988-03-04 1989-08-10 Hoffmann, Hans Georg, 5630 Remscheid, De
DE3939291A1 (en) * 1989-11-28 1991-05-29 Messerschmitt Boelkow Blohm TOOL RECEIVING SYSTEM
US5114286A (en) * 1991-08-13 1992-05-19 Calkins Donald W Interchangeable tool alignment system
SE509218C2 (en) * 1994-08-29 1998-12-21 Sandvik Ab shaft Tools
DE69522201T2 (en) * 1994-09-26 2002-05-08 Nikken Kosakusho Works Ltd TOOL HOLDER
GB9522651D0 (en) * 1995-11-04 1996-01-03 Xcalibre Equipment Ltd Drill chuck
WO1999002297A1 (en) * 1997-07-09 1999-01-21 Cook Harold D Machine tool extension and method of forming the same
US5938212A (en) * 1999-01-05 1999-08-17 Wadsworth; Scott L. Holder for non-locking bit in a locking bit chuck
EP1185391B1 (en) * 1999-06-15 2003-01-08 Franz-Josef Pokolm Machining tool

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1308229A1 (en) * 2001-11-01 2003-05-07 Big Alpha Co., Inc. Tool holder
US6739810B2 (en) 2001-11-01 2004-05-25 Big Alpha Co. Inc. Tool holder
FR2838072A1 (en) * 2002-04-04 2003-10-10 Fournel Device for adjusting tool on tool holder abuts tool tail on height adjustable stop rod during installation
US8113833B2 (en) 2004-06-21 2012-02-14 Straumann Holding, AG Disposable rotary tool for dental or medical applications
US20090208299A1 (en) * 2004-06-21 2009-08-20 Straumann Holding Ag Method for manufacturing disposable rotary cutting tools and disposable rotary tool for dental or medical applications
US20110232073A1 (en) * 2004-06-21 2011-09-29 Straumann Holding Ag Method for manufacturing disposable rotary cutting tools and disposable rotary tool for dental or medical applications
US20090208903A1 (en) * 2004-06-21 2009-08-20 Straumann Holding Ag Method for manufacturing disposable rotary cutting tools and disposable rotary tool for dental or medical applications
US8438950B2 (en) 2004-06-21 2013-05-14 Straumann Holding Ag Method for manufacturing disposable rotary cutting tools for dental or medical applications
US9770247B2 (en) * 2004-06-21 2017-09-26 Straumann Holding Ag Method for manufacturing disposable rotary cutting tools and disposable rotary tool for dental or medical applications
US9962167B2 (en) 2004-06-21 2018-05-08 Straumann Holding Ag Method for manufacturing disposable rotary cutting tools and disposable rotary tool for dental or medical applications
WO2017025947A1 (en) * 2015-08-11 2017-02-16 Iscar Ltd. Replaceable cutting head having threaded mounting portion with two spaced apart conical abutment surfaces provided with the same cone angle, tool holder and rotary cutting tool
US9844817B2 (en) 2015-08-11 2017-12-19 Iscar, Ltd. Replaceable cutting head having threaded mounting portion with two spaced apart conical abutment surfaces provided with the same cone angle, tool holder and rotary cutting tool
JP2018527197A (en) * 2015-08-11 2018-09-20 イスカル リミテッド Replaceable cutting head, tool holder and rotary cutting tool with screw mounting part having two spaced conical abutment surfaces having the same cone angle

Also Published As

Publication number Publication date
DE60012976D1 (en) 2004-09-16
CN1140372C (en) 2004-03-03
WO2001045887A1 (en) 2001-06-28
EP1239988B1 (en) 2004-08-11
DE60012976T2 (en) 2005-01-05
SE9904708D0 (en) 1999-12-21
CN1413133A (en) 2003-04-23
SE9904708L (en) 2001-06-22
EP1239988A1 (en) 2002-09-18
SE519656C2 (en) 2003-03-25
JP2003517943A (en) 2003-06-03
US6382885B2 (en) 2002-05-07
KR20020064353A (en) 2002-08-07

Similar Documents

Publication Publication Date Title
US6485235B1 (en) Cutting tool assembly with replaceable cutting head
US5961259A (en) Rotatable type machine tool
EP0929372B1 (en) Milling cutter
US4456270A (en) Chuck
US6183688B1 (en) Tool for cutting machining
US6382885B2 (en) Tool extender and tool assembly
CN101018637A (en) Cutting insert and cutting tool
US4684298A (en) Drill
GB2174322A (en) Milling cutter
JPS6333961B2 (en)
EP0803306B1 (en) Tool
AT391644B (en) REVOLVER HEAD FOR A LATHE AND TOOL HOLDER TO MATCH THERE
US5882015A (en) Floating toolholder
US5388936A (en) Tool holder
US7628571B2 (en) Tool chucking apparatus
JPS6133805A (en) Tool holder
US20040261241A1 (en) Extended tool holder with draw collet
GB2171937A (en) Boring bar
JPS58165906A (en) Quick-change drill chuck
US20090278324A1 (en) Tool chucking apparatus
GB2198374A (en) Chuck adaptor
US4306473A (en) Tool insert for boring operations, particularly for a boring bar
CN212239233U (en) Bidirectional chuck for irregular drill bit
JP2000190112A (en) Eccentric collet
CA2219291C (en) Rotatable type machine tool

Legal Events

Date Code Title Description
AS Assignment

Owner name: SANDVIK AB, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ISAKSSON, ANDERS;REEL/FRAME:011631/0876

Effective date: 20010314

STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: SANDVIK INTELLECTUAL PROPERTY HB, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK AB;REEL/FRAME:016290/0628

Effective date: 20050516

Owner name: SANDVIK INTELLECTUAL PROPERTY HB,SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK AB;REEL/FRAME:016290/0628

Effective date: 20050516

AS Assignment

Owner name: SANDVIK INTELLECTUAL PROPERTY AKTIEBOLAG, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK INTELLECTUAL PROPERTY HB;REEL/FRAME:016621/0366

Effective date: 20050630

Owner name: SANDVIK INTELLECTUAL PROPERTY AKTIEBOLAG,SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK INTELLECTUAL PROPERTY HB;REEL/FRAME:016621/0366

Effective date: 20050630

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12