JP2005074622A - Tool holder - Google Patents

Tool holder Download PDF

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Publication number
JP2005074622A
JP2005074622A JP2004244137A JP2004244137A JP2005074622A JP 2005074622 A JP2005074622 A JP 2005074622A JP 2004244137 A JP2004244137 A JP 2004244137A JP 2004244137 A JP2004244137 A JP 2004244137A JP 2005074622 A JP2005074622 A JP 2005074622A
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JP
Japan
Prior art keywords
shaft
tool
tool holder
shaft wall
wall
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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.)
Pending
Application number
JP2004244137A
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Japanese (ja)
Inventor
Manfred Hellbach
ヘルバッハ マンフレート
Thilo Henke
ヘンケ ティロ
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of JP2005074622A publication Critical patent/JP2005074622A/en
Pending legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/008—Chucks; Expansion mandrels; Adaptations thereof for remote control with arrangements for transmitting torque
    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/06—Spanners; Wrenches with rigid jaws of socket type
    • B25B13/065—Spanners; Wrenches with rigid jaws of socket type characterised by the cross-section of the socket
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2265/00—Details of general geometric configurations
    • B23B2265/32—Polygonal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2265/00—Details of general geometric configurations
    • B23B2265/32—Polygonal
    • B23B2265/326—Hexagonal

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To considerably prolong the lifetime of a tool holder. <P>SOLUTION: In a tool holder, each shaft wall (14) has an inclined surface (16) to gradually expand a storage shaft (11) toward the shaft wall (14) in a partial range (b) adjacent the preceding shaft wall (14) when viewed in the rotational direction (15). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、手持ち式工作機械、特に穿孔ハンマのための、回転モーメント伝達のための工具ホルダであって、多辺形状の収容シャフトが設けられており、該収容シャフトが、工具、特に穿孔機の、等しい辺数を有する工具軸を挿入するために設けられており、前記収容シャフトが、辺で互いに突き合わされたシャフト壁により限定されている形式のものに関する。   The present invention relates to a tool holder for transmitting a rotational moment for a hand-held machine tool, in particular a drilling hammer, provided with a multi-sided receiving shaft, the receiving shaft being a tool, in particular a drilling machine. In which the receiving shaft is defined by shaft walls that are abutted against each other at the sides.

穿孔ハンマのための公知の工具ホルダ（ドイツ連邦共和国特許第２５５１１２５号明細書）は、収容シャフトとして、同心的な孔を有しており、この孔には、いわゆる「ＳＤＳ−Ｐｌｕｓ」工具の工具軸が挿入される。この工具軸には、第１の対角線上に向かい合って、軸線方向で見て両側で閉じられた２つの切欠きが形成されており、これらの切欠きには、シャフト壁を通って収容シャフト内に突入する、工具ホルダの対応配置されたロック球が嵌め込まれる。工具軸には、前記切欠きに対して付加的に、第２の対角線上に向かい合って、工具軸の端部に開いて開口した回転連行溝が配置されている。これらの回転連行溝は、少なくともほぼ半径方向に延びる２つの平坦な側面を有している。これらの平坦な側面は、ストリップ状の回転連行部材の対応配置された面と協働する。これらの面は、円筒状のシャフト壁に配置されている。全体として、このようにして工具軸はロック球によって、軸方向に摺動されるように工具ホルダに保持されており、脱落に対して保護されており、回転連行部材を介して、工具ホルダの回転方向に回転連行を被る。   Known tool holders for drilling hammers (German Patent 2,551,125) have a concentric hole as the receiving shaft, in which the tool of the so-called “SDS-Plus” tool is located. An axis is inserted. The tool shaft is formed with two notches facing the first diagonal line and closed on both sides when viewed in the axial direction. These notches pass through the shaft wall and pass through the housing shaft. A lock ball, which is placed in correspondence with the tool holder, is inserted. In addition to the notch, the tool shaft is provided with a rotational entrainment groove facing the second diagonal and opening at the end of the tool shaft. These rotary entraining grooves have at least two flat side surfaces extending in a substantially radial direction. These flat side surfaces cooperate with correspondingly arranged surfaces of the strip-like rotary entrainment member. These surfaces are arranged on a cylindrical shaft wall. Overall, in this way, the tool shaft is held by the tool holder so as to be slid in the axial direction by the lock ball, and is protected against falling off. Incurs rotational entrainment in the direction of rotation.

所定のタイプの工具ホルダでは、対角線状に向かい合った回転連行部材の形成が省略されており、代わりに収容シャフトが六角形又は六辺状に形成されている。対応して、工具軸は同様に六角形又は六辺状の横断面を有している。工具ホルダに工具軸を挿入するためには、収容シャフトのシャフト壁と工具軸との間にギャップ寸法が存在していることが不可欠である。工具ホルダの回転時には、加工品と噛合い係合している工具により、工具軸と工具ホルダとが互いに対して回転する。この場合に、工具軸の辺が、収容シャフトの軸線方向に延びる線接触部を介して工具ホルダのシャフト壁に接触する。手持ち式工作機械の振動、打撃及び激しい運動により、工具軸の辺はシャフト壁の硬化された薄い表面に食い込む。このことは、工具軸とシャフト壁との間のギャップ寸法の拡大、及び工具ホルダと工具軸とのさらなる互いの回転につながる。工具ホルダは絶え間なく摩耗し、工具軸がついには工具ホルダ内で自由に回転してしまうことにより、短時間ののちに完全な故障につながる。
ドイツ連邦共和国特許第２５５１１２５号明細書 In a predetermined type of tool holder, the formation of the rotating entraining member facing diagonally is omitted, and the accommodation shaft is formed in a hexagonal shape or a hexagonal shape instead. Correspondingly, the tool axis likewise has a hexagonal or hexagonal cross section. In order to insert the tool axis into the tool holder, it is essential that a gap dimension exists between the shaft wall of the receiving shaft and the tool axis. When the tool holder is rotated, the tool shaft and the tool holder are rotated relative to each other by the tool meshingly engaged with the workpiece. In this case, the side of the tool shaft comes into contact with the shaft wall of the tool holder via a line contact portion extending in the axial direction of the housing shaft. Due to the vibration, striking and strenuous movement of the hand-held machine tool, the sides of the tool shaft bite into the hardened and thin surface of the shaft wall. This leads to an increase in the gap dimension between the tool axis and the shaft wall and a further mutual rotation of the tool holder and the tool axis. The tool holder is constantly worn and the tool shaft eventually rotates freely in the tool holder, leading to a complete failure after a short time.
German Patent 2551125

そこで本発明の課題は、冒頭に述べた形式の工具ホルダを改良して、工具ホルダの耐用寿命が著しく高められるようにすることである。   The object of the present invention is therefore to improve the tool holder of the type mentioned at the outset so that the useful life of the tool holder is significantly increased.

この課題を解決した本発明による手段によれば、それぞれのシャフト壁が、回転方向で見て先行するシャフト壁に隣接する部分範囲に、前記シャフト壁の方へ向かって、収容シャフトを徐々に拡大する傾斜面を有している。   According to the means according to the invention for solving this problem, each shaft wall gradually expands the receiving shaft towards the shaft wall in a partial range adjacent to the preceding shaft wall in the rotational direction. It has an inclined surface.

上に述べた本発明による工具ホルダは、次のような利点を有する。すなわち、工具ホルダによる工具軸の回転連行時に、連行された工具軸によりシャフト壁の上に述べたような線負荷ではなく、むしろ面負荷が生じる。これにより、今やより大きい面に分配された押圧力に基づき、工具ホルダの耐用寿命が著しく高められる。この場合に、工具軸とシャフト壁との間に存在する潤滑フィルムが面摩擦を防止することができる。さらに、シャフト壁の表面の硬化を省略することが可能であり、このことは、製造コストの低減をもたらす。同様に、安価な材料を用いることもできる。   The tool holder according to the present invention described above has the following advantages. That is, when the tool holder is rotated and entrained by the tool holder, the entrained tool axis causes a surface load rather than a linear load as described above on the shaft wall. This significantly increases the service life of the tool holder, based on the pressing force now distributed over the larger surface. In this case, the lubricating film present between the tool shaft and the shaft wall can prevent surface friction. Furthermore, it is possible to omit the hardening of the surface of the shaft wall, which leads to a reduction in production costs. Similarly, inexpensive materials can be used.

次に本発明を図示の実施例につき詳しく説明する。   The invention will now be described in detail with reference to the illustrated embodiment.

図１に部分的に横断面図に示した、手持ち式工作機械のための工具ホルダは、この工具ホルダに結合された、回転する駆動スピンドルの回転モーメントを、工具ホルダに収容された工具に伝達するために働く。例えば、手持ち式工作機械は穿孔ハンマであり、工具ホルダに収容される工具は穿孔機である。この穿孔機は、付加的にさらに軸線方向に打撃するように駆動することができる。   A tool holder for a hand-held machine tool, partially shown in cross-section in FIG. 1, transmits the rotational moment of a rotating drive spindle coupled to this tool holder to a tool housed in the tool holder. To work. For example, a hand-held machine tool is a drilling hammer, and a tool accommodated in a tool holder is a drilling machine. This drilling machine can additionally be driven to strike further axially.

工具ホルダは、多角形又は多辺状の収容シャフト１１を有しており、この収容シャフト１１は、この収容シャフト１１と等しい辺数を有する工具の工具軸１２（図２）を挿入するため設けられている。この場合、工具軸１２は、押込みのために必要なギャップ寸法１３を除いては嵌合い精度良く収容シャフト１１に収容されている。本実施例では、収容シャフト１１は対称的に六辺形状に形成されており、従って、工具軸１２も同様に六辺形状を有している。これにより、収容シャフト１１は、それぞれ１２０°だけ互いの方へ傾いた、全部で６つの、全て等しく形成されたシャフト壁１４により限定されている。   The tool holder has a polygonal or multi-sided accommodation shaft 11, which is provided for inserting a tool axis 12 (FIG. 2) of a tool having the same number of sides as the accommodation shaft 11. It has been. In this case, the tool shaft 12 is accommodated in the accommodation shaft 11 with high accuracy with the exception of the gap dimension 13 necessary for pressing. In the present embodiment, the housing shaft 11 is symmetrically formed in a hexagonal shape, and thus the tool shaft 12 has a hexagonal shape as well. Thereby, the housing shaft 11 is limited by a total of six, all equally formed shaft walls 14, each inclined towards each other by 120 °.

工具ホルダが図１の矢印１５の方向に回転されると、工具軸１２は、収容シャフト１１に対してわずかな相対回転ののちに工具ホルダにより連行される。工具ホルダの高い安定性を得るためには、それぞれのシャフト壁１４の、回転方向で見て先行するシャフト壁１４に隣接する部分範囲に、このシャフト壁１４の方へ向かって収容シャフト１１を徐々に拡大する傾斜面１６が設けられている。図１には、シャフト壁１４の、傾斜面１６を設けられた部分範囲の幅に符号ｂが付されている。傾斜面１６は、工具ホルダの回転方向１５に工具軸１２を連行する場合に、工具軸１２が、ギャップ寸法１３に基づいて、辺によりシャフト壁１４に線状に押圧されるのではなく、むしろ面状に、シャフト壁１４の、回転方向でみて前側の部分範囲に設けられた傾斜面１６に当接するように働く。これにより、シャフト壁１４の面負荷が得られる。このことは、工具軸１２の辺による線負荷に比べて、シャフト壁１４の著しくよりわずかな摩耗、ひいては耐用寿命の著しい上昇、ひいては工具ホルダの安定性をもたらす。さらに工具軸１３とシャフト壁１４との間に潤滑フィルムが存在するようにした場合、面状の摩擦を低減することができる。傾斜面１６により得られた、シャフト壁１４の面負荷により、さもなければ通例のシャフト壁１４の表面硬化を省略することができ、これにより、製造コストが低下する。   When the tool holder is rotated in the direction of arrow 15 in FIG. 1, the tool shaft 12 is entrained by the tool holder after a slight relative rotation with respect to the receiving shaft 11. In order to obtain a high stability of the tool holder, the receiving shaft 11 is gradually moved towards this shaft wall 14 in a partial area of the respective shaft wall 14 adjacent to the preceding shaft wall 14 in the rotational direction. An inclined surface 16 is provided. In FIG. 1, the width of the partial range of the shaft wall 14 where the inclined surface 16 is provided is denoted by the symbol b. The inclined surface 16 does not cause the tool shaft 12 to be linearly pressed against the shaft wall 14 by the side, based on the gap dimension 13, when the tool shaft 12 is entrained in the direction 15 of rotation of the tool holder. The shaft wall 14 works so as to come into contact with the inclined surface 16 provided in the partial region on the front side in the rotational direction. Thereby, the surface load of the shaft wall 14 is obtained. This results in significantly less wear of the shaft wall 14 and thus a significant increase in the service life and thus the stability of the tool holder compared to the line load due to the side of the tool shaft 12. Furthermore, when a lubricating film is present between the tool shaft 13 and the shaft wall 14, surface friction can be reduced. Otherwise, due to the surface load of the shaft wall 14 obtained by the inclined surface 16, otherwise normal surface hardening of the shaft wall 14 can be omitted, thereby reducing the manufacturing cost.

本発明は上に述べた実施例に限定されない。従って、収容シャフト１４及び工具軸１２の辺数は任意に選択してよい。例えば収容シャフト１４及び工具軸１２は、３つ、４つ、５つ又はそれよりも多い辺を有していてよい。   The invention is not limited to the embodiments described above. Therefore, the number of sides of the accommodation shaft 14 and the tool shaft 12 may be arbitrarily selected. For example, the receiving shaft 14 and the tool shaft 12 may have three, four, five, or more sides.

工具ホルダの部分横断面図である。It is a partial cross-sectional view of a tool holder.

工具が挿入された図１の工具ホルダの等しい部分横断面図である。FIG. 2 is an equivalent partial cross-sectional view of the tool holder of FIG. 1 with a tool inserted.

符号の説明Explanation of symbols

１１ 収容シャフト、 １２ 工具軸、 １３ ギャップ寸法、 １４ シャフト壁、 １５ 矢印、 １６ 傾斜面、 ｂ 幅   11 Housing shaft, 12 Tool axis, 13 Gap dimension, 14 Shaft wall, 15 Arrow, 16 Inclined surface, b Width

Claims (2)

手持ち式工作機械、特に穿孔ハンマのための回転モーメント伝達のための工具ホルダであって、多辺状の収容シャフト（１１）が設けられており、該収容シャフト（１１）が、工具、特に穿孔機の、等しい辺数を有する工具軸（１２）を挿入するために設けられており、前記収容シャフト（１１）が、辺で互いに突き合わされたシャフト壁（１４）により限定されている形式のものにおいて、それぞれのシャフト壁（１４）が、回転方向（１５）で見て先行するシャフト壁（１４）に隣接する部分範囲（ｂ）に、前記シャフト壁（１４）の方へ向かって、収容シャフト（１１）を徐々に拡大する傾斜面（１６）を有していることを特徴とする、工具ホルダ。   A tool holder for transmitting a rotational moment for a hand-held machine tool, in particular a drilling hammer, provided with a multi-sided housing shaft (11), which housing shaft (11) is provided with a tool, in particular a drill. Provided for inserting a tool axis (12) having an equal number of sides of the machine, wherein the receiving shaft (11) is limited by a shaft wall (14) abutted against each other at the sides In which the respective shaft wall (14) is located in a partial area (b) adjacent to the preceding shaft wall (14) in the direction of rotation (15) towards the shaft wall (14). A tool holder, characterized in that it has an inclined surface (16) that gradually enlarges (11). 収容シャフト（１１）が六辺形状に形成されており、それぞれ１２０°だけ互いの方へ傾いた６つのシャフト壁（１４）により限定されている、請求項１記載の工具ホルダ。   2. Tool holder according to claim 1, characterized in that the receiving shaft (11) is formed in a hexagonal shape and is limited by six shaft walls (14) each inclined towards each other by 120 [deg.].
JP2004244137A 2003-09-01 2004-08-24 Tool holder Pending JP2005074622A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2003140164 DE10340164A1 (en) 2003-09-01 2003-09-01 Tool holder for hand tools has multi-angled socket shaft defined by shaft walls which each widen out in one part to increase socket shaft in respect of tool shaft

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JP2005074622A true JP2005074622A (en) 2005-03-24

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CN (1) CN100532024C (en)
DE (1) DE10340164A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE480353T1 (en) * 2005-07-21 2010-09-15 Pinto Spa Mario TOOL CLAMPING DEVICE FOR MACHINE TOOLS
DE102006016804A1 (en) * 2006-04-10 2007-10-11 Robert Bosch Gmbh Tool holder for a hammer drill

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0639744A (en) * 1992-06-16 1994-02-15 Etab Montabert Device for retaining byte of hydraulic lock breaker
JPH0735028B2 (en) * 1988-03-04 1995-04-19 日立工機株式会社 Rotational impact transmission member of impact tool

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0735028B2 (en) * 1988-03-04 1995-04-19 日立工機株式会社 Rotational impact transmission member of impact tool
JPH0639744A (en) * 1992-06-16 1994-02-15 Etab Montabert Device for retaining byte of hydraulic lock breaker

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CN1590035A (en) 2005-03-09
DE10340164A1 (en) 2005-03-24
CN100532024C (en) 2009-08-26

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