EP1245341A2 - Accouplement - Google Patents

Accouplement Download PDF

Info

Publication number
EP1245341A2
EP1245341A2 EP02007226A EP02007226A EP1245341A2 EP 1245341 A2 EP1245341 A2 EP 1245341A2 EP 02007226 A EP02007226 A EP 02007226A EP 02007226 A EP02007226 A EP 02007226A EP 1245341 A2 EP1245341 A2 EP 1245341A2
Authority
EP
European Patent Office
Prior art keywords
power transmission
transmission device
coupling sleeve
drilling
locking elements
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
EP02007226A
Other languages
German (de)
English (en)
Other versions
EP1245341A3 (fr
EP1245341B1 (fr
Inventor
Klaus Dreps
Oliver Weidelener
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.)
Drebo Werkzeugfabrik GmbH
Original Assignee
Drebo Werkzeugfabrik GmbH
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 Drebo Werkzeugfabrik GmbH filed Critical Drebo Werkzeugfabrik GmbH
Publication of EP1245341A2 publication Critical patent/EP1245341A2/fr
Publication of EP1245341A3 publication Critical patent/EP1245341A3/fr
Application granted granted Critical
Publication of EP1245341B1 publication Critical patent/EP1245341B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25D17/005—Attachments or adapters placed between tool and hammer
    • 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
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0034—Details of shank profiles
    • 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
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • 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
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0042—Ball-shaped locking members

Definitions

  • the invention relates to a power transmission device according to the preamble of claim 1, as well as drilling devices the preambles of claims 22 and 23.
  • Milling bits and larger drill bits are quite expensive to buy. Therefore, it is uneconomical for different tool holders like spline or SDS-plus or SDS-max various Obtain milling bits and drill bits of the same diameter and ready to hold. There is therefore a need for one Coupling system that the exchange of the shaft part depending on the Type of tool holder on the hammer drill or Impact drill enables.
  • the invention is based on the object Power transmission device according to the preamble of claim 1 to create that in terms of drilling performance in the long term is improved, although the possibility of free exchange consists of head parts and shaft parts.
  • the provision of two mutually symmetrical sliding sleeves means that the power transmission device according to the invention can be used universally for different head parts and shaft parts.
  • a tool holder with spline shaft, with SDS-plus, with SDS-max holder or with polygonal holder can be easily realized for the same drill bit by the power transmission device according to the invention without an additional adapter.
  • appropriate solution with the radially supported locking elements is reliably prevented that the locking elements are pressed out during operation and thus the drill head is accidentally released.
  • the torque transmission can take place via separate, preferably one-piece rotary driving elements which are fixedly connected to the coupling sleeve, so that the wear and tear on the locking elements and grooves is significantly reduced.
  • the extremely low mass of the power transmission device according to the invention results in a high efficiency in the transmission of the impact energy, especially since no threads or the like that are susceptible to wear also have to be used as the coupling element. Nevertheless, the power transmission device is extremely slim, so that working with the drilling tool created in this way is not hindered.
  • the division of the functions of the axial locking and the torque transmission into two separate elements is particularly favorable. This division also allows a structural simplification in that, if required, the coupling can be easily dismantled and assembled, for example for cleaning purposes. By simply axially moving the sliding sleeves, the locking elements are released in their radial guidance and can be pressed outwards. In this regard, it is advantageous if the locking grooves run out slightly obliquely so that they push the locking elements outwards when the respective end is pulled out.
  • a End face of the ends as a butt surface, which is essentially extends flat over the entire diameter of the shaft and only is provided on the outer edge with a chamfer that the Inserting each end into the coupling sleeve is simplified.
  • the power transmission device can be pronounced easy to implement and it is possible to implement the invention Power transmission device inexpensive to manufacture.
  • the invention Compared to a pure cone connection, the invention has Solution the advantage that locking is possible so that the risk of accidents is reduced and that no further disassembly Tools are required.
  • the dimensions of the coupling sleeve according to the invention only around is a little larger than the shank of the drill or chisel. This measure means that it can be used in deeper holes easily possible, the coupling sleeve with in the hole is immersed if a drill bit or a tool Chisel with a diameter larger than that is used Diameter of the shaft and also larger than the diameter the coupling sleeve is.
  • a power transmission device with an inventive To create a clutch part with a shaft part Drill or chisel tool connects and can be locked.
  • the coupling sleeve is a power transmission device, that works surprisingly insensitive to interference. After yourself no drilling dust or the like due to the smooth outer surface starts or any drilling dust that has come into contact there immediately falls, it is advantageous according to the invention that also if the coupling sleeve is leaning against the borehole wall, if the coupling sleeve has also penetrated into the borehole, no relevant additional friction arises.
  • the smooth outer surface prevents that the locking elements unlock due to the friction and thus prevent accidents.
  • a Circlip against the direction of actuation of sliding sleeves acts with which the locking elements can be activated and are solvable.
  • the circlip can be used as below Prestressed and almost circular closed ring be provided, for example over an angle of extends about 350 degrees and for example with a coin that inserted and rotated in the slot between the ring ends, is releasable and slidable over the sliding sleeves to unlock to allow.
  • the smooth outer surface can also be realized by Promote stop sleeves against which the locking elements against their locking springs are each supported and which are extend at the ends of the coupling sleeve. Especially for the rough The transmission device according to the invention can thus be operated protect optimally, both against accidental Striking or a harsh mechanical treatment than also against the penetration of drilling dust.
  • Locking elements can be a high efficiency of the invention Achieve clutch that enables almost the entire initiated series of hits of the drill bit or the Chisel is fed.
  • Fig. 1 is a power transmission device 10 of an inventive Drilling tool 12 shown in section.
  • the power transmission device 10 has a coupling sleeve 14, which extends essentially in tubular form and in one piece.
  • the coupling sleeve 14 has a constant inner diameter on.
  • the coupling sleeve has four uniformly distributed around the circumference Recordings 24 and 26 each for locking elements 28 and 30 on.
  • the locking elements 28 and 30 designed as balls, with one coupling sleeve in particular four balls are provided.
  • the recordings 24 and 26 are conical and face the inside of the coupling sleeve 14 adjacent to a diameter of something is smaller than the diameter of the balls 28 and 30.
  • the locking elements 28 and 30 can recordings 24 and 26 after partially push through inside, but not fall out inside.
  • sliding sleeves 36 and 38 are movably guided on the coupling sleeve 14.
  • the sliding sleeves 36 and 38 each have a guide section , with the guide section for the sliding sleeve 38 in Fig. 1 is designated 40.
  • the guide section 40 lies with its annular inside on the outside of the coupling sleeve 14 on.
  • a shoulder 42 is formed for engagement with a stop ring 44 is determined.
  • the sliding sleeve 38 also has a movement section 46 on, viewed from the inside towards the guide section 40 jumps back. This section takes a compression spring 48 on that between the shoulder between the guide section and movement section and a corresponding shoulder on the Coupling sleeve 14 acts and the sliding sleeve 38 to the outside, that is to the head or shaft part assigned to it.
  • the movement section 46 is quite slim, but so that it is on a thickened area 50 of the coupling sleeve 14 can slide. This creates an essentially smooth outer surface the power transmission device 10 according to the invention ensured.
  • the sliding sleeves 38 is the power transmission device 10 in the engaged state.
  • the guide portion 40 pushes the sliding sleeve 38 the locking elements 30 through the receptacle 26 inside so that they fit into the locking grooves 33 and 35 intervention.
  • the locking elements 28 and 30 are on the inside the sliding sleeve 38 is supported.
  • the Locking elements 28 and 30 do not dodge and are essentially laterally in the receptacle 24 and 26 supported without play.
  • the sliding sleeve 38 is manually against the action of the compression spring 48 moved inward, the locking elements 28 and 30 in the area of an annular groove 52. There they are free to externally movable, so that the power transmission device through the movement of the locking element disengages and the associated head section or shaft section can be removed freely can.
  • the sliding sleeves 36 and 38 are symmetrical to one another, as well as the entire power transmission device 10. This means that no attention is paid to this in practice in which orientation the coupling is installed.
  • FIG. 2 shows the manner in which a head part 54 and a shaft part 56 is inserted into the power transmission device 10 could be.
  • the rotary driving grooves 32 and 34 and the Locking grooves 33 and 35 extend over a length, which is significantly larger than the stroke of the hammer drill or hammer drill is.
  • the ends 58 and 60 of the head part 54 and shaft part 56 are equipped with abutment surfaces 62 and 64, so that the Impact energy introduced into the shaft part with little loss on the Head part 54 is transferable.
  • FIGS. 5 and 6 is a shaft part 56 with an SDS-plus tool holder 66 can be seen.
  • a spline tool holder 68 can be used, so that only the shaft part 56 has to be replaced.
  • FIGS. 5 and 6 serves practically at the same time as an adapter from a tool holder for the SDS-max system on a spline tool holder.
  • a commercial one Drills with SDS-max shank can be added by adding the invention Power transmission device 10 and the shaft part 56 also in a machine tool, the drill chuck is intended for splines.
  • FIG. 7 shows a further embodiment of an inventive one Power transmission device can be seen.
  • This embodiment is characterized by the use of special locking elements 72 out, which is about building up half a dog's bone exhibit. Two lugs face radially inwards and serve for locking in corresponding recesses in the head part or shaft part of the drilling tool or chisel tool.
  • locking elements 71, 72 are larger areas for power transmission in the axial Direction available. The result is a more pronounced one Form-fit, both against the corresponding center bars the coupling sleeve 14 and against the head part respectively Shank portion.
  • the ends are the Coupling sleeve 14, the stop sleeves 76 and 74 are provided.
  • the Stop sleeves are by means of a soldered or welded connection permanently connected to the coupling sleeve. This will make the Coupling sleeve 14 stiffened on the one hand, and it is not possible that by grinding any security elements used the clutch fails.
  • the implementation of the stop sleeves opens the Possibility of the power transmission device a smooth outer surface to give.
  • the outer diameter of the stop sleeves corresponds to this 74 and 76 the outer diameter of the sliding sleeves 36 and 38, on which the coupling sleeves abut.
  • a flush surface With the existing gap through the effect of the spring 78 is reduced as much as possible.
  • a locking ring 78 is used between the Sliding sleeves 36 and 38 .
  • the axial dimension of the circlip is such that that he completely the space between the sliding sleeves fills and the sliding sleeves in the locked position holds. It also has the same thickness as the sliding sleeves their neighboring area. On the other hand, this leads to that the outside diameter is the same there too, so that the Power transmission device according to the invention over its entire Course a smooth outer surface and also the same Has outer diameter.
  • the locking ring 78 is not completely closed, but practically extends like a kind of clasp almost a full circle.
  • the remaining gap of practically 1 Millimeters are used to introduce a suitable tool such as a screwdriver or a coin, taking light Turn this tool the locking ring against its spring tension is bent up somewhat resiliently, so that its inner diameter is so big that it is on one of the neighboring ones Sliding sleeves can be pushed.
  • a Unlocking the power transmission device according to the invention easily possible by operating the sliding sleeves.
  • the preload is particularly favorable in this context of the circlip 78, due to this bias easily snaps into the groove between the sliding sleeves 36 and 38, so it's self-locking.
  • Fig. 8 it can be seen how the power transmission device according to the invention with inserted head and shaft part can operate a drilling or chisel tool.
  • This representation otherwise corresponds to Fig. 2, so that the execution in this respect reference is made to the figures.
  • Fig. 11 shows that the coupling sleeve according to the invention in any can be designed appropriately.
  • an adaptation to the SDS-max standard is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
EP02007226A 2001-03-29 2002-03-28 Accouplement Expired - Lifetime EP1245341B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10115579A DE10115579C2 (de) 2001-03-29 2001-03-29 Kraftübertragungsvorrichtung
DE10115579 2001-03-29

Publications (3)

Publication Number Publication Date
EP1245341A2 true EP1245341A2 (fr) 2002-10-02
EP1245341A3 EP1245341A3 (fr) 2003-05-21
EP1245341B1 EP1245341B1 (fr) 2011-05-18

Family

ID=7679557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007226A Expired - Lifetime EP1245341B1 (fr) 2001-03-29 2002-03-28 Accouplement

Country Status (3)

Country Link
EP (1) EP1245341B1 (fr)
AT (1) ATE509739T1 (fr)
DE (1) DE10115579C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1400655A3 (fr) * 2002-09-23 2005-01-12 DreBo Werkzeugfabrik GmbH Mécanisme de transmission de couple
US20200254596A1 (en) * 2017-10-10 2020-08-13 Milwaukee Electric Tool Corporation Power tool to tool bit extension adapter
USD922166S1 (en) 2018-10-09 2021-06-15 Milwaukee Electric Tool Corporation Tool bit adapter
USD962733S1 (en) 2017-07-25 2022-09-06 Milwaukee Electric Tool Corporation Drive guide
US11642765B2 (en) 2017-07-25 2023-05-09 Milwaukee Electric Tool Corporation Drive guide
USD1026586S1 (en) 2022-08-03 2024-05-14 Milwaukee Electric Tool Corporation Drive guide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1505907A (en) * 1974-07-04 1978-04-05 Duss Gmbh & Co Rotary percussive hammer
EP0928668A2 (fr) * 1998-01-13 1999-07-14 Kohler Maschinenbau AG Accouplement pour une machine à percer par percussion
GB2338672A (en) * 1998-06-18 1999-12-29 Bosch Gmbh Robert Toolholder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4401663A1 (de) * 1994-01-21 1995-07-27 Bosch Gmbh Robert Werkzeughalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1505907A (en) * 1974-07-04 1978-04-05 Duss Gmbh & Co Rotary percussive hammer
EP0928668A2 (fr) * 1998-01-13 1999-07-14 Kohler Maschinenbau AG Accouplement pour une machine à percer par percussion
GB2338672A (en) * 1998-06-18 1999-12-29 Bosch Gmbh Robert Toolholder

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1400655A3 (fr) * 2002-09-23 2005-01-12 DreBo Werkzeugfabrik GmbH Mécanisme de transmission de couple
USD962733S1 (en) 2017-07-25 2022-09-06 Milwaukee Electric Tool Corporation Drive guide
US11642765B2 (en) 2017-07-25 2023-05-09 Milwaukee Electric Tool Corporation Drive guide
US20200254596A1 (en) * 2017-10-10 2020-08-13 Milwaukee Electric Tool Corporation Power tool to tool bit extension adapter
US11780063B2 (en) 2017-10-10 2023-10-10 Milwaukee Electric Tool Corporation Power tool to tool bit extension adapter
USD922166S1 (en) 2018-10-09 2021-06-15 Milwaukee Electric Tool Corporation Tool bit adapter
USD982409S1 (en) 2018-10-09 2023-04-04 Milwaukee Electric Tool Corporation Tool bit adapter
USD1026586S1 (en) 2022-08-03 2024-05-14 Milwaukee Electric Tool Corporation Drive guide

Also Published As

Publication number Publication date
DE10115579C2 (de) 2003-02-27
EP1245341A3 (fr) 2003-05-21
DE10115579A1 (de) 2002-10-10
EP1245341B1 (fr) 2011-05-18
ATE509739T1 (de) 2011-06-15

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