EP3109003A1 - Schnellspannvorrichtung für schraubendreherbits - Google Patents

Schnellspannvorrichtung für schraubendreherbits Download PDF

Info

Publication number
EP3109003A1
EP3109003A1 EP16000896.7A EP16000896A EP3109003A1 EP 3109003 A1 EP3109003 A1 EP 3109003A1 EP 16000896 A EP16000896 A EP 16000896A EP 3109003 A1 EP3109003 A1 EP 3109003A1
Authority
EP
European Patent Office
Prior art keywords
shank
bit
quick
release device
limit element
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
EP16000896.7A
Other languages
English (en)
French (fr)
Other versions
EP3109003B1 (de
Inventor
Tsung-Te Lin
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.)
You Lu Enterprise Co Ltd
Original Assignee
You Lu Enterprise Co Ltd
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 You Lu Enterprise Co Ltd filed Critical You Lu Enterprise Co Ltd
Publication of EP3109003A1 publication Critical patent/EP3109003A1/de
Application granted granted Critical
Publication of EP3109003B1 publication Critical patent/EP3109003B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool

Definitions

  • the present invention relates to a quick-release device, and more particularly to a quick-release device for screwdriver bits.
  • a screwdriver bit In our daily life, a screwdriver bit is usually longitudinally mounted into a hand tool for rotating a screw or a bolt.
  • the standards of the screw/bolt are various. Consequently, the bits need to be often changed and a quick-release device for the screwdriver bit is needed for smooth operations.
  • the conventional hand tool has a ring movably sleeved on a distal end thereof for mounting the bit and multiple is steel balls are respectively radially disposed in the ring for positioning the steel balls.
  • An outer sleeve is movably sleeved on the ring for selectively inwardly pushing the steel balls to hold the inserted bit in place.
  • the inner space of the ring is limited such that to process space for/and mount steel balls is a difficult work and the processing cost of the ring is raised.
  • the ring needs to have a thick wall for ensuring the structural strength of the ring after being processed. As a result, the ring must be made thicker and the metal material is wasted and a small operating space is very inconvenient for operation.
  • the present invention has arisen to mitigate and/or obviate the disadvantages of the conventional quick-release device for screwdriver bits.
  • the main objective of the present invention is to provide an improved quick-release device for screwdriver bits, which has simplified structures.
  • the quick-release device in accordance with the present invention comprises a shank having a first end and a second end.
  • the shank has a polygonal hole longitudinally defined in the first end thereof and the polygonal hole is adapted for partially receiving a bit, wherein the bit has a groove annularly defined therein.
  • At least one slot is longitudinally defined in the first end of the shank.
  • An annular groove is defined in an inner periphery of the polygonal hole and communicates with the at least one slot, wherein the annular groove is formed with a tapered section toward the first end of the shank.
  • An expandable limit element is received in the annular groove, wherein the limit element has an outer diameter slightly smaller than a diameter of the annular groove.
  • a sleeve is movably sleeved on the first end of the shank.
  • the sleeve has at least one protrusion inwardly extending therefrom, wherein the at least one protrusion is engaged into the at least one slot to prevent the sleeve from being rotated relative to the hollow stub and the at least one protrusion abuts against the limit element when removing the bit form the polygonal hole.
  • a stopper is secured on one end of the shank for preventing the sleeve from removing from the shank.
  • a quick-release device for screwdriver bits in accordance with the present invention comprises a shank 10, a sleeve 20 movably sleeved on one end of the shank 10 and a stopper 30 is secured on one end of the shank 10 for preventing the sleeve 20 from removing from the shank 10.
  • the shank 10 has a first end and a second end.
  • the shank 10 has a polygonal hole 11 longitudinally defined in the first end of the shank 10 for partially receiving a bit 40, wherein the bit 40 has a groove 41 annularly defined therein.
  • a hollow stub 12 longitudinally extends from the first end of the shank 10 and at least one slot 13 is longitudinally defined in the hollow stub 12.
  • the hollow stub 12 has a diameter smaller than that of the shank 10 and a diametrical difference is formed between the shank 10 and the hollow stub 12, wherein the diametrical difference is equal to a thickness of the sleeve 20.
  • the hollow stub 12 has two slots 13 defined therein and the two slots 13 diametrically correspond to each other.
  • An annular groove 14 is defined in an inner periphery of the polygonal hole 11 and communicates with the at least one slot 13.
  • the annular groove 14 is formed with a tapered section 15 toward the hollow stub 12.
  • An expandable limit element 16 is received in the annular groove 14, wherein the limit element 16 has an outer diameter slightly smaller than a diameter of the annular groove 14.
  • the limit element 16 is a C-ring, an O-ring and the like.
  • the shank 10 further includes a polygonal shaft 17 extending from the second end thereof.
  • the polygonal shaft 17 is adapted to be connected to a handle (not shown) for operator to easily operate the bit 40.
  • the sleeve 20 is movably sleeved on the hollow stub 12 and reciprocally moved relative to the hollow stub 12.
  • the sleeve 20 has at least one protrusion 21 inwardly extending therefrom, wherein the at least one protrusion 21 is engaged into the at least one slot 13 to prevent the sleeve 20 from being rotated relative to the hollow stub 12.
  • the at least one protrusion 21 abuts against the limit element 16 when removing the bit 40 form the polygonal hole 11.
  • the bottom of the bit 40 is directly inserted into the polygonal hole 11 when assembling the bit 40 the quick-release device in accordance with the present invention.
  • the limit element 16 is expended due to the shank is the bit 40 after the bottom of the bit 40 passing through the limit element 16.
  • the limit element 16 directly engaged into a groove 41 peripherally defined in the bit 40 and the bottom of the bit 40 abuts a bottom of the polygonal hole 11 when the limit element 16 horizontally corresponds to the groove 41. Consequently, the operator can easily drive a screw by using the quick-release device in accordance with the present invention when the bit 41 is inserted into and positioned in the polygonal hole 11.
  • the limit element 16 is moved with the bit 40 when the bit 40 is reversely pulled.
  • the limit element 16 is inwardly pushed to more tightly engage into the groove 41 due to the tapered section 15 of the annular groove 14 in the shank 10 such that the bit 40 cannot be freely removing from the polygonal hole 11 in the shank 10.
  • the quick-release device for screwdriver bits in accordance with the present invention includes the following advantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
EP16000896.7A 2015-06-16 2016-04-21 Schnellspannvorrichtung für schraubendreherbits Active EP3109003B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW104119369A TWI562865B (en) 2015-06-16 2015-06-16 Quick-release device for bits

Publications (2)

Publication Number Publication Date
EP3109003A1 true EP3109003A1 (de) 2016-12-28
EP3109003B1 EP3109003B1 (de) 2022-06-29

Family

ID=56101249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16000896.7A Active EP3109003B1 (de) 2015-06-16 2016-04-21 Schnellspannvorrichtung für schraubendreherbits

Country Status (2)

Country Link
EP (1) EP3109003B1 (de)
TW (1) TWI562865B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI823502B (zh) * 2022-08-01 2023-11-21 林琮淂 端部操控式起子頭快脫器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3243389A1 (de) * 1982-11-24 1984-05-24 Wera Werk Hermann Werner Gmbh & Co, 5600 Wuppertal Spannfutter fuer werkzeug-einsatzstuecke, insbesondere schraubendreherbits
US4535658A (en) * 1982-03-05 1985-08-20 Allen Manufacturing Company Socket bit holder
DE20211170U1 (de) * 2002-07-24 2002-10-10 Huang Daniel Schnellspannfutter für einen Schraubendreher
US8578823B2 (en) * 2010-10-06 2013-11-12 Simpson Strong-Tie Company Inc. Ring lock mandrel and release mechanism

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934384A (en) * 1998-04-27 1999-08-10 Wang; Peter Transmission shaft and bit mounting arrangement of a motor-driven hand drill
TWM286749U (en) * 2005-11-01 2006-02-01 Jen-Li Huang Detent structure for driving shaft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535658A (en) * 1982-03-05 1985-08-20 Allen Manufacturing Company Socket bit holder
DE3243389A1 (de) * 1982-11-24 1984-05-24 Wera Werk Hermann Werner Gmbh & Co, 5600 Wuppertal Spannfutter fuer werkzeug-einsatzstuecke, insbesondere schraubendreherbits
DE20211170U1 (de) * 2002-07-24 2002-10-10 Huang Daniel Schnellspannfutter für einen Schraubendreher
US8578823B2 (en) * 2010-10-06 2013-11-12 Simpson Strong-Tie Company Inc. Ring lock mandrel and release mechanism

Also Published As

Publication number Publication date
TWI562865B (en) 2016-12-21
EP3109003B1 (de) 2022-06-29
TW201700225A (zh) 2017-01-01

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