EP0223738B1 - Werkzeughalter für Bohr- und Meisselwerkzeuge - Google Patents

Werkzeughalter für Bohr- und Meisselwerkzeuge Download PDF

Info

Publication number
EP0223738B1
EP0223738B1 EP86810472A EP86810472A EP0223738B1 EP 0223738 B1 EP0223738 B1 EP 0223738B1 EP 86810472 A EP86810472 A EP 86810472A EP 86810472 A EP86810472 A EP 86810472A EP 0223738 B1 EP0223738 B1 EP 0223738B1
Authority
EP
European Patent Office
Prior art keywords
adjusting sleeve
tool holder
locking elements
guide tube
strips
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.)
Expired - Lifetime
Application number
EP86810472A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0223738A2 (de
EP0223738A3 (en
Inventor
Anton Neumaier
Hans-Jürgen Hoereth
Gerhard Rumpp
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to AT86810472T priority Critical patent/ATE54596T1/de
Publication of EP0223738A2 publication Critical patent/EP0223738A2/de
Publication of EP0223738A3 publication Critical patent/EP0223738A3/de
Application granted granted Critical
Publication of EP0223738B1 publication Critical patent/EP0223738B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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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
    • B25D17/08—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
    • B25D2217/0049—Roll-shaped locking members
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S279/00—Chucks or sockets
    • Y10S279/904—Quick change socket
    • Y10S279/905—Quick change socket with ball detent
    • 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
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y10T279/17068—Rotary socket
    • 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
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y10T279/17076—Spreading elements
    • 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
    • Y10T279/17—Socket type
    • Y10T279/17761—Side detent
    • Y10T279/17803—Rotary cam sleeve

Definitions

  • the invention relates to a tool holder for receiving tools, the insertion end of which has at least one axially closed and at least one longitudinal groove open towards the rear end face, the tool holder having a guide tube with radial passage openings for locking elements for the axially displaceable by means of an axially displaceable or rotatable adjusting sleeve has closed longitudinal grooves and driving strips for the longitudinal grooves open towards the rear end.
  • Tool holders of the type mentioned are already e.g. known from FR-A 2 331 410 and are mainly used in rotary hammers with which a tool is given a rotary or impact movement either in combination or in combination.
  • the tool is non-rotatably mounted in the guide tube, but is axially displaceable to a limited extent.
  • tools which are provided with at least one axially closed and at least one longitudinal groove open towards the rear end face.
  • the driver strips in the guide tube which engage in the open longitudinal grooves of the tool serve to transmit the rotary movement from the guide tube to the tool.
  • the locking elements for the closed longitudinal grooves only serve to axially secure the tools in the tool holder.
  • the invention has for its object to provide a tool holder with locking elements and driving bars, which is suitable for receiving tools with open and closed and only provided with closed longitudinal grooves insertion end.
  • driver bars are radially displaceable.
  • the radially displaceable carrier bars can also be disengaged radially. This enables the use of tools which only have axially closed longitudinal grooves. If, on the other hand, tools are to be accommodated in the tool holder with longitudinal grooves that are open towards the rear end face, the driver strips remain radially engaged in the receiving bore of the guide tube.
  • the carrier strips can expediently be displaced radially by means of the adjusting sleeve.
  • the adjusting sleeve thus serves on the one hand for the radial displacement of the locking elements and on the other hand for the radial displacement of the carrier bars. These two functions can be operated, for example, by different movements such as axial displacement and turning.
  • the adjusting sleeve When the drive bars and the locking elements are radially disengaged, the part of the locking elements and drive bars protruding into the receiving bore of the guide tube in the engaged position must be able to disengage outwards from the guide tube. In order to make this possible, it is advantageous for the adjusting sleeve to have escape niches which permit the radial disengagement of the locking elements and carrier strips.
  • the alternative niches can be arranged axially one behind the other or next to one another in the circumferential direction.
  • both the locking elements need to be engaged. If, on the other hand, tools with open and closed longitudinal grooves are to be accommodated, both the locking elements and the drive bars must be radially engaged.
  • the escape niches are designed and arranged in such a way that when the actuating sleeve is actuated in the locking direction, first the locking elements and then the driving bars are radially displaced. Conversely, when unlocking, the carrier bars are radially disengaged and then that of the locking elements. To change the tools, it must always be unlocked until the carrier bars and the locking elements are disengaged.
  • the adjusting sleeve can be rotated and the alternative niches for the carrier strips exceed the alternative niches for the locking elements in radian measure.
  • the driving bars can be radially disengaged into the escape niches provided for this purpose, while the locking elements are still engaged.
  • the locking elements can also disengage radially into the escape niche provided for this purpose.
  • the adjusting sleeve can be turned directly to move the locking elements and drive bars radially. However, this usually requires a relatively large angle of rotation, which is unfavorable in terms of operation.
  • a switching link for the actuation of the adjusting sleeve in relation to the guide tube is provided.
  • Such a shifting gate can be formed, for example, in a helical shape, so that when the adjusting sleeve is axially displaced, it is simultaneously rotated.
  • Another possibility is to design the shifting gate in a step-like manner, so that the adjusting sleeve for the radial engagement and disengagement of the locking elements can initially only be rotated over part of the entire rotation path. The further rotation of the adjusting sleeve for the radial engagement and disengagement of the driving bars can then only take place after the adjusting sleeve has been axially displaced.
  • the adjusting sleeve can be secured, for example, by means of a spring element in the position holding the locking elements and driving bars in the engaged position. To disengage the locking elements and drive bars, however, the force of this spring element must be overcome.
  • the adjusting sleeve can be locked in at least one end position. This locking can be achieved for example by means of a locking element with which the adjusting sleeve is held in the unlocked position, for example. After changing the tools, the adjusting sleeve is then returned to its starting position by overcoming the locking element.
  • the tool holder shown in FIGS. 1 to 5 is arranged on a device with a housing designated overall by 1.
  • a guide tube designated overall by 2
  • a guide tube is rotatably supported by a bearing 3 in the housing 1.
  • a sealing ring 4 sliding on the guide tube prevents on the one hand the penetration of dirt into the bearing 3 and on the other hand prevents lubricant from escaping from the housing 1.
  • a striker 5 is axially displaceably mounted.
  • an insertion end of a tool denoted overall by 6, is inserted.
  • the insertion end 6 has two diametrically opposed closed longitudinal grooves 6a and two longitudinal grooves 6c arranged offset with respect to these and open towards the rear end face 6b.
  • the guide tube 2 is provided with through openings 2a, into which roller-shaped locking elements 7 are inserted.
  • the guide tube 2 also has recesses 2b for carrier strips 8.
  • an adjusting sleeve is rotatably mounted and axially displaceable to a limited extent.
  • the adjusting sleeve 9 is pushed by means of a compression spring 10 against a securing ring 11 arranged on the guide tube 2.
  • the adjusting sleeve 9 is provided with a threaded bore 9a for an adjusting screw 12.
  • the adjusting screw 12 engages with a pin-shaped part in a control groove 2c on the guide tube 2. Due to the interaction of the control groove 2c with the adjusting screw 12, when the adjusting sleeve 9 is pulled back, the latter is partially rotated about its longitudinal axis.
  • the adjusting sleeve 9 has escape niches 9b and 9c on its inside.
  • the dodging niches 9b serve to dodge the locking elements 7 and the dodging niches 9c, which are somewhat larger in the circumferential direction, serve to partially accommodate the carrier strips 8.
  • the adjusting sleeve 9 is pulled back, the latter is rotated counterclockwise.
  • the escape niches 9c initially reach the area of the driving bars 8.
  • the driving bars 8 can thus disengage radially.
  • the escape niches 9b also reach the area of the locking elements 7, so that they can disengage radially.
  • the insertion end 6 is released and can be pulled out of the guide tube 2.
  • a plug-in end designated overall with 14 is inserted into the guide tube 2.
  • the insertion end 14 differs from the insertion end 6 shown in FIGS. 1 to 3 in that it only has closed longitudinal grooves 14a.
  • the locking elements 7 serve at the same time to hold the insertion end 14 axially and to transmit torque from the guide tube 6 to the insertion end 14.
  • the adjusting sleeve 9 remains in an intermediate position.
  • the driver strips 8 are disengaged into the alternative niches 9c.
  • the locking elements 7, however, are held by the adjusting sleeve 9 in the locking position 14 of the insertion end.
  • a projection 1a arranged on the housing 1 forms together with the adjusting sleeve 9 a kind of labyrinth seal.
  • This labyrinth seal largely prevents the ingress of drilling dust to the sealing ring 4 or to the bearing 3.
  • the adjusting sleeve 9 In order to change the insertion end 14, the adjusting sleeve 9 must also be pulled back against the housing 1 until it stops. The adjusting sleeve 9 reaches the position shown in FIG. 3, which enables the locking elements 7 and the carrier strips 8 to be disengaged radially.
  • FIG. 6 shows a view of the guide tube 2.
  • the passage opening 2a narrowing towards the axis of the guide tube 2 for the locking elements 7 and the approximately helical control groove 2c can be seen.
  • the adjusting sleeve 9 is rotated during its entire displacement path.
  • Fig. 7 shows a further embodiment of a guide tube designated overall by 15.
  • the guide tube 15 also has through openings 15a.
  • the control groove 15c is however stepped.
  • the steep sleeve 9 is first turned up to the stop.
  • the drive bars 8 can disengage radially.
  • the adjusting sleeve 9 must be withdrawn in the axial direction. Only then is it possible to rotate the adjusting sleeve 9, which serves to disengage the locking elements 7 radially.
  • This embodiment has the advantage over the embodiment shown in FIG. 6 that the adjusting sleeve can be locked automatically in the rear position. This leaves both hands free to change tools.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Drilling And Boring (AREA)
  • Drilling Tools (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Dairy Products (AREA)
  • Endoscopes (AREA)
  • Confectionery (AREA)
EP86810472A 1985-11-11 1986-10-22 Werkzeughalter für Bohr- und Meisselwerkzeuge Expired - Lifetime EP0223738B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86810472T ATE54596T1 (de) 1985-11-11 1986-10-22 Werkzeughalter fuer bohr- und meisselwerkzeuge.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853539912 DE3539912A1 (de) 1985-11-11 1985-11-11 Werkzeughalter fuer bohr- und meisselwerkzeuge
DE3539912 1985-11-11

Publications (3)

Publication Number Publication Date
EP0223738A2 EP0223738A2 (de) 1987-05-27
EP0223738A3 EP0223738A3 (en) 1988-08-31
EP0223738B1 true EP0223738B1 (de) 1990-07-18

Family

ID=6285654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810472A Expired - Lifetime EP0223738B1 (de) 1985-11-11 1986-10-22 Werkzeughalter für Bohr- und Meisselwerkzeuge

Country Status (10)

Country Link
US (1) US4691929A (enrdf_load_stackoverflow)
EP (1) EP0223738B1 (enrdf_load_stackoverflow)
JP (1) JPS62114887A (enrdf_load_stackoverflow)
AT (1) ATE54596T1 (enrdf_load_stackoverflow)
AU (1) AU582716B2 (enrdf_load_stackoverflow)
CA (1) CA1273831A (enrdf_load_stackoverflow)
DE (2) DE3539912A1 (enrdf_load_stackoverflow)
DK (1) DK166439B1 (enrdf_load_stackoverflow)
ES (1) ES2003494A6 (enrdf_load_stackoverflow)
HU (1) HU195141B (enrdf_load_stackoverflow)

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Also Published As

Publication number Publication date
ATE54596T1 (de) 1990-08-15
CA1273831A (en) 1990-09-11
DE3539912A1 (de) 1987-05-14
DK166439B1 (da) 1993-05-24
JPS62114887A (ja) 1987-05-26
DE3672760D1 (de) 1990-08-23
EP0223738A2 (de) 1987-05-27
EP0223738A3 (en) 1988-08-31
DK533486A (da) 1987-05-12
DK533486D0 (da) 1986-11-07
JPH0581392B2 (enrdf_load_stackoverflow) 1993-11-12
US4691929A (en) 1987-09-08
HU195141B (en) 1988-04-28
AU582716B2 (en) 1989-04-06
HUT42988A (en) 1987-09-28
ES2003494A6 (es) 1988-11-01
AU6503386A (en) 1987-05-14

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