EP0083860A2 - Vorsatzgerät für Bohrmaschinen oder dergleichen - Google Patents

Vorsatzgerät für Bohrmaschinen oder dergleichen Download PDF

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Publication number
EP0083860A2
EP0083860A2 EP82306749A EP82306749A EP0083860A2 EP 0083860 A2 EP0083860 A2 EP 0083860A2 EP 82306749 A EP82306749 A EP 82306749A EP 82306749 A EP82306749 A EP 82306749A EP 0083860 A2 EP0083860 A2 EP 0083860A2
Authority
EP
European Patent Office
Prior art keywords
attachment
chuck
tool
drive
tubular portion
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
EP82306749A
Other languages
English (en)
French (fr)
Other versions
EP0083860B1 (de
EP0083860A3 (en
Inventor
Charles Glen Dunn
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.)
Individual
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
Priority to AT82306749T priority Critical patent/ATE29687T1/de
Publication of EP0083860A2 publication Critical patent/EP0083860A2/de
Publication of EP0083860A3 publication Critical patent/EP0083860A3/en
Application granted granted Critical
Publication of EP0083860B1 publication Critical patent/EP0083860B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor

Definitions

  • This invention relates to an attachment which can be used to provide a drive connection between a tool such as a screwdriver, a nut-runner or other tool requiring a rotary drive and the chuck of a power drill or like tool utilising a chuck.
  • a tool such as a screwdriver, a nut-runner or other tool requiring a rotary drive and the chuck of a power drill or like tool utilising a chuck.
  • the invention is primarily concerned with screwdriving but can clearly be applied to other operations for which a power tool can be used, for example, drilling, grinding, engraving, reaming, cutting or countersinking, and could also be used to drive a tap or die holder.
  • a drive attachment for a power tool utilising a chuck comprising a tubular portion adapted to fit over a drill bit mounted in the chuck and having at one end drive means adapted to provide a direct driving engagement with the chuck jaws or the chuck head of the power tool.
  • a drive attachment as specified in the immediately preceding paragraph and a power tool utilising a chuck within which is mounted a drill bit and wherein the bit is received within the tubular portions of the attachment and the drive means at the end of the attachment is in direct driving engagement with the chuck jaws on the chuck head of the power tool.
  • the drive means may comprise one or more lugs or projections and these lugs or projections preferably extend longitudinally but they may extend radially with respect to the tubular portion. If the lugs extend longitudinally they will usually be three or four in number and are preferably dimensioned so as to engage in the circumferentially disposed spaces between the three or four jaws of the chuck. If the lugs or projections extend radially they may be movable radially into driving engagement with the chuck head, for example into the chuck key-holes.
  • the drive means may comprise a friction grip acting on the cylindrical surface of the chuck head.
  • the drive means may comprise a rubber or plastics sleeve or ring provided with means for forcing it tightly against the said cylindrical surface. The parts of the sleeve adjacent the chuck key-holes may be forced partly into these holes thereby improving the friction drive.
  • the attachment according to the invention may be made of metal or of a suitable plastics material, or of a combination of metal and plastics.
  • the attachment may be made to suit any size of drill bit or supplied blank (that is without the centre hole forming the tubular portion so that the blank can be drilled to form the tubular portion by the bit over which it will be used to give very accurate location for precision work).
  • any size of drill bit or supplied blank that is without the centre hole forming the tubular portion so that the blank can be drilled to form the tubular portion by the bit over which it will be used to give very accurate location for precision work.
  • one size of centre hole for the tubular portion say that giving 6 mm. clearance
  • The-end of the tubular portion remote from the drive means may have an internal or external polygonal or other non-circular configuration adapted to mate with a portion of complementary shape of a tool component to be driven by the power tool.
  • this remote end of the tubular portion may comprise an integral tool piece such as a screwdriver head.
  • the attachment shown in Figure 1 comprises a tubular portion 1 having at one end two or more longitudinally extending lugs or projections 2 which are circumferentially spaced and dimensioned so as to fit snugly into the spaces between the jaws of the chuck of a power drill when those jaws receive and are in tight engagement with a drill bit which is received within the tubular portion 1.
  • the other end of the tubular portion 1 comprises a part 3 of polygonal or other non-circular section. Over this part 3 can be fitted a complementarily shaped part 3a of for example a nut runner 5 as shown in Figure 2.
  • One or more grub screws 4 may be used for holding the attachment in place, the screw or screws bearing against the side portions of the drill bit.
  • the nut runner 5 is simply slipped over the drill bit so that the parts 3 and 3a are in engagement.
  • the ends of the lugs 2 are bevelled or rounded or otherwise shaped to facilitate ready insertion into the spaces between the jaws of the chuck.
  • the length of the lugs 2 is preferably such that the end faces 6 of the tubular portion at the base of, and circumferentially between, the lugs come into contact with the free outer end portions of the chuck jaws. It is possible that if the .lugs 2 are over-long they may tend to get bent in . use, hence it is advisable to make them just long enough to give a good driving engagement with the chuck jaws.
  • Each of the lugs 2 preferably has its circumferentially (or peripherally) opposed side faces 7 ( Figures 4 and 6) parallel so as to co-operate with the opposed parallel faces of adjacent chuck_jaws.
  • Rotary drive from the power tool will be transmitted through one or the other of the side faces 7 of each lug.
  • the lugs 2 can have their non-driven side faces 8 sloping as indicated in Figures 7 and 8 (that is where the lugs are each in the form of a right-angled triangle the hypotenuse of which comprises the non-driven face 8 of the lug). It is believed that this triangular shape may. increase the strength of the lug, although it has the disadvantage that the power tool cannot be used to drive the attachment in reverse (for example, to withdraw a screw or unscrew a nut).
  • FIG. 3 The embodiment shown in Figure 3 is similar to that in Figure 1 but the attachment is long enough to shroud the drill bit completely.
  • the attachment At the end of the tubular portion 1 remote from the lugs 2 the attachment has a recess 8 for example of hexagonal section to receive, for example, a screwdriver bit 9.
  • the end of the portion 1 could be simply shaped as an in- tegral screwdriver head or other tool to be rotary driven.
  • the attachment according to the invention may be made by drilling a bore in a solid metal rod and then forming the lugs by a grinding operation.
  • the lugs may be.first formed by a forging operation, followed by a drilling operation to produce the bore of the tubular portion.
  • the dimensions of the attachment such as the diameter of the bore of the tubular portion will vary with the size of the drill bit being used.
  • the lateral cross sectional dimensions of the lugs 2 will vary with the size of the drill bit.
  • a 5.5 mm. diameter drill bit required an attachment having lugs 2 that were approximately 3 mm. x 4 mm. and equally spaced circumferentially.
  • the internal diameter of the tubular portion was 5.7 mm. and the external diameter 10.2 mm.
  • the attachment comprises a tubular portion 11 which fits over a drill bit D and is rigidly connected to a tubular housing or sleeve 12 which fits over the head H of the chuck of a power tool such as a drill.
  • This housing 12 is provided with three radially extending projections (not shown) which can readily be moved into driving engagement with the key holes 13 of the drill chuck.
  • the projections may be in the form of pins, rods or balls and known mechanism such as a locking ring 14 is provided for advancing the projections into driving engagement with the holes 13 and releasably holding them there during use of the attachment.
  • the locking ring 14 may comprise a ring with three tapered sections each of which forces one of the lugs or projections into one of the holes 13 when the ring is rotated. Once again it is not necessary to remove the drill bit when the attachment is fitted and a considerable saving in time is effected.
  • the locking ring may comprise several tapered sections adapted to clamp a radially displaceable ring of, for example, rubber or plastics material against the cylindrical outer surface of the chuck head. It will be found that the friction between the chuck head and a rubber or plastics ring provides sufficient grip to transmit drive to, for example, a screwdriver or like tool attachment.
  • the tubular portion 11 may have an end section or a recess of polygonal or other non-circular configuration adapted to fit snugly into or over a complementarily shaped recess or section at one end of the sleeve 12.
  • the sleeve 12 may have three projections located so that they can be advanced into the three chuck key holes 13.
  • Each projection may, for example, comprise a grub screw having an unthreaded hole-engaging portion at its inner end.
  • the projections or lugs 2 are partly embedded in an outer member 18 which may be shaped somewhat in the form of a hollow screwdriver handle.
  • the member 18 may be made, for example, as an injection moulded plastics component with the lugs or projections projecting internally thereof.
  • the attachment may be secured in place on the chuck by means of one or more grub screws 15 engaging the chuck head or one or more grub screws 16 engaging the drill bit.
  • the end 17 of the member 18 remote from the chuck can be appropriately shaped (for example, hexagonal) to receive a complementarily shaped socket in a tool component to be driven.
  • the whole unit could be diecast Mazack and therefore relatively inexpensive.
  • Figure 11 shows a part of the embodiment of Figure 10 with certain parts omitted for the sake of clarity for example only one of the lugs 2 is shown.
  • the drill bit D is shown held by means of chuck jaws J.
  • the three lugs may project from a single cylindrical metal member which is itself embedded in the plastics material.
  • the drive attachment according to the inveption can be used to drive any known type of screwdriver bit, for example slotted, or those known by the Trade Marks "Phillips”, “Posidrive”, “Supadrive” or “Robinson” or a nut runner, Allen Key driver and the like, or a tap holder, die holder, chuck or collet, flexible drive countersink bit or other component which is intended to be rotary driven.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Drilling And Boring (AREA)
  • Drilling Tools (AREA)
  • Dowels (AREA)
EP82306749A 1982-01-08 1982-12-17 Vorsatzgerät für Bohrmaschinen oder dergleichen Expired EP0083860B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82306749T ATE29687T1 (de) 1982-01-08 1982-12-17 Vorsatzgeraet fuer bohrmaschinen oder dergleichen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8200492 1982-01-08
GB08200492A GB2118462B (en) 1982-01-08 1982-01-08 Power tool screwdriving attachment

Publications (3)

Publication Number Publication Date
EP0083860A2 true EP0083860A2 (de) 1983-07-20
EP0083860A3 EP0083860A3 (en) 1984-08-01
EP0083860B1 EP0083860B1 (de) 1987-09-16

Family

ID=10527539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82306749A Expired EP0083860B1 (de) 1982-01-08 1982-12-17 Vorsatzgerät für Bohrmaschinen oder dergleichen

Country Status (8)

Country Link
EP (1) EP0083860B1 (de)
AT (1) ATE29687T1 (de)
AU (1) AU563590B2 (de)
CA (1) CA1220058A (de)
DE (1) DE3277297D1 (de)
GB (1) GB2118462B (de)
NZ (1) NZ202940A (de)
ZA (1) ZA829436B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492729A1 (de) * 1990-12-20 1992-07-01 Skil Nederland B.V. Werkzeughalter

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129353B (en) * 1982-10-11 1986-05-21 Itw Ltd Combination hole-drilling and fastener-driving tools
GB2137912B (en) * 1983-04-08 1987-05-28 Charles Glen Dunn Combined screw-driver attachment and power drill
DE3828982A1 (de) * 1988-08-26 1990-03-01 Fischer Artur Werke Gmbh Bohrvorrichtung zur herstellung von bohrloechern mit hinterschneidung
CN105458333B (zh) * 2015-12-26 2017-12-08 宁波鑫晟工具有限公司 一种手持式电钻
CN105458334B (zh) * 2015-12-26 2017-12-08 宁波鑫晟工具有限公司 一种防误操作的电钻
WO2021077049A2 (en) * 2019-10-18 2021-04-22 Georgia Tech Research Corporation Drive belt with surface texture for minimizing vibrations

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613438A1 (de) * 1976-03-30 1977-10-13 Metabowerke Kg Werkzeughalter fuer eine maschine, insbesondere handbohrmaschine
GB2063114A (en) * 1979-11-20 1981-06-03 Fischer Artur A power drill chuck attachment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045125B (en) * 1979-03-07 1983-05-11 Illinois Tool Works Combination drilling and screwing-up tools

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613438A1 (de) * 1976-03-30 1977-10-13 Metabowerke Kg Werkzeughalter fuer eine maschine, insbesondere handbohrmaschine
GB2063114A (en) * 1979-11-20 1981-06-03 Fischer Artur A power drill chuck attachment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492729A1 (de) * 1990-12-20 1992-07-01 Skil Nederland B.V. Werkzeughalter

Also Published As

Publication number Publication date
ZA829436B (en) 1983-09-28
AU563590B2 (en) 1987-07-16
AU1009783A (en) 1983-07-14
CA1220058A (en) 1987-04-07
GB2118462B (en) 1986-03-26
NZ202940A (en) 1985-12-13
ATE29687T1 (de) 1987-10-15
EP0083860B1 (de) 1987-09-16
EP0083860A3 (en) 1984-08-01
GB2118462A (en) 1983-11-02
DE3277297D1 (en) 1987-10-22

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