EP3107694A1 - Tool holder - Google Patents
Tool holderInfo
- Publication number
- EP3107694A1 EP3107694A1 EP15703298.8A EP15703298A EP3107694A1 EP 3107694 A1 EP3107694 A1 EP 3107694A1 EP 15703298 A EP15703298 A EP 15703298A EP 3107694 A1 EP3107694 A1 EP 3107694A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool holder
- sealing ring
- base body
- seat
- central 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 16
- 230000007423 decrease Effects 0.000 claims abstract description 3
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
- B25D17/084—Rotating chucks or sockets
- B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0057—Details related to cleaning or cooling the tool or workpiece
- B25D2217/0065—Use of dust covers
- B25D2217/0069—Protecting chucks against entering of chip dust
Definitions
- the present invention relates to a tool holder for a hand-held machine tool, in particular for a turning and chiseling machine tool, e.g. a hammer drill, as known for example from DE 10 2010 10029609 A1.
- a turning and chiseling machine tool e.g. a hammer drill
- the tool holder according to the invention for a hand-held machine tool has a tubular base body and a dust cap.
- the main body has an end face, which is followed by a cylindrical or prismatic outer surface.
- the dust cap has successively in the insertion direction a sealing ring, a central portion and a seat.
- the sealing ring is arranged in the insertion direction in front of the end face of the base body.
- the seat has a cylindrical or prismatic inner surface which bears against the outer surface of the base body.
- the central portion has a conical inner surface whose inner diameter decreases in the insertion direction down to the inner diameter of the cylindrical inner surface.
- the dust cap sits with its seat tight on the body.
- the inner surface of the seat and the outer surface of the body are preferably complementary to each other.
- the middle section is not on the body.
- the middle section forms a solid-state joint, which allows a small deflection of the sealing ring transversely to the working axis.
- the sealing ring can follow in this way transverse movements of the drill or bit.
- the sealing ring remains circumferentially adjacent to the drill and seals the opening of the tool holder.
- abrasion of the sealing ring is reduced by oblique drills.
- Fig. 1 a hammer drill
- FIG. 2 a tool holder Identical or functionally identical elements are indicated by the same reference numerals in the figures, unless stated otherwise.
- FIG. 1 schematically shows a combination hammer 1 as an example of a chiseling hand tool.
- the combination hammer 1 has a tool holder 2 in which a shank end 3 of a tool, eg one of the drill 4, can be inserted.
- a primary drive of the combihammer 1 is a motor 5, which drives a hammer mechanism 6 and an output shaft 7.
- the motor 5 and the striking mechanism 6 are arranged in a machine housing 8.
- a user can perform the combination hammer 1 by means of a handle 9 attached to the machine housing 8 and take the combination hammer 1 by means of a system switch 10 in operation.
- the combination hammer 1 rotates the drill 4 continuously about a working axis 11 and can beat the drill 4 in the direction of impact 12 along the working axis 11 in a substrate.
- the striking mechanism 6 is preferably a motor-driven pneumatic percussion 6.
- a racket 13 is coupled via an air spring 14 to one of the motor 5 along a working axis 11 reciprocating piston 15.
- the racket 13 strikes directly or indirectly by an anvil 16 on the shaft end 3.
- the tool holder 2 is shown in detail in Fig. 2 in a longitudinal section.
- the tool holder 2 has a driven by the output shaft 7 hollow spindle 17 (main body) with a receiving space 18 for the tool 4.
- the drill 4 can through an output-side opening on the front side 19 of the body 17 in the insertion direction 20 (counter to the direction of impact 12) in the receiving space 18 are used.
- the receiving space 18 is preferably complementary to the shaft end 3, for example cylindrical.
- the exemplary tool holder 2 has two in the receiving space 18 partially projecting pawls 21.
- the pawls 21 are in two slots 22, which are introduced into the base body 17.
- a locking ring 23 covers in the radial direction, the two pawls 21 such that they can not dodge radially.
- a counter-insertion direction 20 spring-loaded slide 24 holds the two pawls 21 in the locking ring 23.
- a user can pull the two pawls 21 in the insertion direction 20 from the locking ring 23 by means of an unlocking sleeve 25 so that they radially can swing out of the receiving space 18.
- pawls 21 and balls can be used.
- the tool holder 2 also has one or more protruding into the receiving space 18 webs 26 which are rigidly connected to the main body 17. A rotating about the working axis 11 movement of the base body 17 is transmitted by means of the webs 26 on the drill 4.
- a dust cap 27 protects the tool holder 2 against dust.
- the dust cap 27 is attached to the main body 17 in the insertion direction 20.
- the dust cap 27 has in the insertion direction 20 of the drill 4 three immediately successive sections 28, 29, 30.
- the three sections 28, 29, 30 are preferably a monolithic component, i. hang without joining zones, neither glued, welded, bolted, etc., together.
- An inner diameter 31 of the sealing ring 29 is narrower than the typical diameter of the drill 4, accordingly, the inner diameter 31 of the sealing ring 29 is smaller than the inner diameter 33rd of the receiving space 18.
- the sealing ring 28 and the drill 4 close dust-tight with each other and thus prevent dust from entering the receiving space 18.
- the sealing ring 28 may have a sealing lip 32 which is inserted into the inner surface 34 of the sealing ring 28 and the inner diameter of the 31st Are defined.
- the sealing lip 32 is a thin ring, which is preferably formed of a softer plastic than the dust cap 27, e.g. made of rubber.
- a rear portion 30 of the dust cap 27 forms a seat 30 of the dust cap 27 with a cylindrical inner surface 35.
- the inner surface 35 is preferably tight against the outer surface 36 of the body 17 at.
- the inner surface 35 of the seat 30 preferably has the same shape as the outer surface 36 of the main body 17, i. both cylindrical or both prismatic.
- An inner diameter 37 of the seat 30 is equal to the outer diameter of the base body 17.
- An annular thickening 38 of the seat 30 can engage in an annular groove of the base body 17 to prevent accidental removal of the dust cap 27.
- a central portion 29 connects the front portion 28 and the rear portion 30.
- the middle portion 29 forms a solid-state joint 29 between the sealing ring 28 and the seat 30.
- the middle portion 29 has a conical inner surface 39.
- the conical inner surface 39 widens from the Seat 30 to the sealing ring 28, at least up to the front side 19 of the main body 17, increasingly on.
- the inner diameter 40 increases accordingly against the insertion direction 20.
- a wedge-shaped gap 41 results.
- the inclination 42 of the conical inner surface 39 is small and is in the range between 5 degrees and 20 degrees.
- a length 43 of the central portion 29 is greater than half the inner diameter 37 of the seat 30, ie greater than half the outer diameter of the base body 17th
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14155930.2A EP2910337A1 (en) | 2014-02-20 | 2014-02-20 | Tool holder |
PCT/EP2015/052736 WO2015124460A1 (en) | 2014-02-20 | 2015-02-10 | Tool holder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3107694A1 true EP3107694A1 (en) | 2016-12-28 |
EP3107694B1 EP3107694B1 (en) | 2019-11-27 |
Family
ID=50137532
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14155930.2A Withdrawn EP2910337A1 (en) | 2014-02-20 | 2014-02-20 | Tool holder |
EP15703298.8A Active EP3107694B1 (en) | 2014-02-20 | 2015-02-10 | Tool holder |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14155930.2A Withdrawn EP2910337A1 (en) | 2014-02-20 | 2014-02-20 | Tool holder |
Country Status (4)
Country | Link |
---|---|
US (1) | US10099360B2 (en) |
EP (2) | EP2910337A1 (en) |
CN (1) | CN106029304A (en) |
WO (1) | WO2015124460A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10646259B2 (en) * | 2017-04-05 | 2020-05-12 | Warsaw Orthopedic, Inc. | Surgical implant bending system and method |
EP3763484A1 (en) * | 2019-07-11 | 2021-01-13 | Hilti Aktiengesellschaft | Sealing lip for tool holder |
EP3763467A1 (en) * | 2019-07-11 | 2021-01-13 | Hilti Aktiengesellschaft | Dust protection cap with vibration decoupling |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3606331A1 (en) * | 1986-02-27 | 1987-09-03 | Bosch Gmbh Robert | Dust-sealing mechanism |
DE9305463U1 (en) * | 1993-04-10 | 1993-06-24 | Crones & Co GmbH, 8800 Ansbach | Tool holder for hand impact tools, especially chisel hammers |
DE10157831B4 (en) * | 2001-11-24 | 2004-06-24 | Robert Bosch Gmbh | Hand-held machine tool with a die for receiving a tool |
DE10202648A1 (en) * | 2002-01-23 | 2003-07-31 | Atlas Copco Constr Tools Ab | Bracket for the inner seal on a fluid-powered hammer mechanism |
DE102007056531A1 (en) * | 2007-11-23 | 2009-05-28 | Hilti Aktiengesellschaft | Hand tool machine with impact tool holder and associated tool |
DE102010029609A1 (en) * | 2010-06-02 | 2011-12-08 | Hilti Aktiengesellschaft | Dust-resistant tool brake, tool insertion part, tool holder, hand tool machine |
DE102012212231A1 (en) * | 2012-07-12 | 2014-01-16 | Hilti Aktiengesellschaft | Hand tool |
-
2014
- 2014-02-20 EP EP14155930.2A patent/EP2910337A1/en not_active Withdrawn
-
2015
- 2015-02-10 WO PCT/EP2015/052736 patent/WO2015124460A1/en active Application Filing
- 2015-02-10 CN CN201580009387.XA patent/CN106029304A/en active Pending
- 2015-02-10 EP EP15703298.8A patent/EP3107694B1/en active Active
- 2015-02-10 US US15/120,282 patent/US10099360B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2015124460A1 (en) | 2015-08-27 |
EP2910337A1 (en) | 2015-08-26 |
CN106029304A (en) | 2016-10-12 |
EP3107694B1 (en) | 2019-11-27 |
US20170057073A1 (en) | 2017-03-02 |
US10099360B2 (en) | 2018-10-16 |
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