JPH02212006A - Drilling machine - Google Patents
Drilling machineInfo
- Publication number
- JPH02212006A JPH02212006A JP1331468A JP33146889A JPH02212006A JP H02212006 A JPH02212006 A JP H02212006A JP 1331468 A JP1331468 A JP 1331468A JP 33146889 A JP33146889 A JP 33146889A JP H02212006 A JPH02212006 A JP H02212006A
- Authority
- JP
- Japan
- Prior art keywords
- drilling machine
- gear
- engagement
- machine according
- engaging
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 24
- 238000010168 coupling process Methods 0.000 claims abstract description 37
- 238000005859 coupling reaction Methods 0.000 claims abstract description 37
- 230000008878 coupling Effects 0.000 claims abstract description 36
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D16/003—Clutches specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Earth Drilling (AREA)
- Drilling And Boring (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野１
本発明は、穿孔及び／又は打撃のための穿孔機であって
、駆動部材によって回転駆動される工具受容部と、回転
駆動系において軸方向に作用するセフティカップリング
とが設けられており、セフティカップリングの一方のカ
ップリング部材が、側面に係合凹部を有する歯車から形
成されており、セフティカップリングの、ばね負荷され
る他方の対向カップリング部材に形成された係合トラフ
と協働する係合体が、上記係合凹部内に配置されている
形式のものに関する［従来の技術］
例えばドリルハンマのような手持ち式１作機械のための
セフティカップリングが、ＤＥ−ＧＭ第８００３５７１
号明細書からすでに公知である。この公知セフティカッ
プリングでは、２つのカップリング部材の他に、ケージ
、プレート及びブシュのような多数の他の構成部材が設
けられている。それによって、カップリング全体の構成
が複雑になり、カップリングの組立てには多くの費用が
かかる。さらに、カップリングが摩耗されると、上記２
つのカップリング部材は交換されねばならない。Detailed Description of the Invention [Industrial Field of Application 1] The present invention relates to a drilling machine for drilling and/or striking, which includes a tool receiving part rotationally driven by a drive member, and a tool receiving part rotationally driven by a drive member, A safety coupling is provided, in which one coupling member of the safety coupling is formed of a gear having an engagement recess on its side surface, and the other opposing spring-loaded member of the safety coupling is formed of a gear having an engagement recess on its side surface. Related to a type in which an engaging body that cooperates with an engaging trough formed in a coupling member is arranged in the engaging recess [Prior art] For example, for a hand-held machine tool such as a drill hammer. Safety coupling is DE-GM No. 8003571
It is already known from the specification of No. In addition to the two coupling parts, this known safety coupling is provided with a number of other components, such as cages, plates and bushings. This complicates the overall construction of the coupling and increases the cost of assembling the coupling. Furthermore, if the coupling is worn out, the above
Two coupling members must be replaced.
【発明が解決しようとする課題１
本発明の課題は、わずかな部材から構成されており、か
つ耐摩耗性で容易に組立て可能なセフティカップリング
を有する穿孔機を提供することにある。Problem 1 to be Solved by the Invention An object of the present invention is to provide a drilling machine having a safety coupling that is constructed from a small number of members, is wear-resistant, and can be easily assembled.
【課題を解決するための手段Ｊ。[Means to solve the problem J.
上記課題は、本発明によればはじめに述べた形式の穿孔
機において、対向カップリング部材に形成された係合ト
ラフが、歯車に形成された係合凹部よりも極めて平らに
なっていることによって解決されている。According to the invention, the above problem is solved in a drilling machine of the type mentioned at the outset, in that the engagement trough formed in the opposing coupling member is much flatter than the engagement recess formed in the gear. has been done.
［作用及び効果１
上記係合機構の構成によれば、摩擦即ちころがり摩擦が
、上記２つのカップリング部材のうちの一方に、即ち耐
摩耗性の高い対向カップリング部材だけに生じる。歯車
は焼結金属のような軟性材料から形成されていても、結
合によって摩耗されることがない。[Operation and Effect 1] According to the configuration of the engagement mechanism described above, friction, that is, rolling friction occurs only in one of the two coupling members, that is, only in the facing coupling member having high wear resistance. Even though the gears are made of soft materials such as sintered metal, they do not wear due to the bond.
請求項２に記載の手段によって、請求項１に記載の穿孔
機の有利な構成及び改良が可能である。請求項３によれ
ば特に有利には、係合体が両カップリング部材のうちの
一方に直接支承されており、それによって別個のケージ
は不要となる。請求項４に記載の手段によって、構成部
材が簡略化かつ節約される。両カップリング部材に対し
てそれぞれ摩耗を減少させる線接触が行われるように、
係合体が係合転動体として形成されていると有利である
。係合モーメントは、係合トラフの深さ及びその壁の傾
斜度並びにばねの締付は力によって影響を受ける。Advantageous developments and improvements of the drilling machine according to claim 1 are possible with the measures according to claim 2. According to claim 3, it is particularly advantageous for the engaging body to be mounted directly on one of the two coupling parts, so that a separate cage is not required. The measures according to claim 4 result in a simplification and economy of components. so that there is a wear-reducing line contact for both coupling members respectively.
It is advantageous if the locking body is designed as a locking roller. The engagement moment is influenced by the depth of the engagement trough and the slope of its wall, as well as the tension of the spring.
［実施例１ 次に図示の実施例につき本発明を説明する。[Example 1 The invention will now be explained with reference to the illustrated embodiment.
穿孔機ｌのケーシング２内には、中間シャフト３を駆動
させる図示されていないモータが配置されている。歯車
５の端面歯列６が、中間シャフト３の歯列４に係合して
いる。歯車５の、モータに向いた側面７には、係合凹１
１Ｓ８が形成されている。係合凹部８内に支承された係
合体９の、有利には少なくとも学部が係合凹部８内に係
合するような深さを、この係合凹部８は有している。係
合体９は、歯車５に対して半径方向に延びる軸線を備え
た転動体として形成されている。係合凹部８は、係合体
９に相応したシリンダジャケット形状に形成されている
。歯車５が押圧ばねｌＯによる作用を受けており、押圧
ばねｌＯは駆動部材１２に固定されたプレート１３によ
って支持されている。駆動部材１２は回転スリーブとし
て形成されている。グリップとは反対側に係合トラフ１
５を有する対向カップリング部材１４が、駆動部材１２
のつばとして形成されている。A motor (not shown), which drives an intermediate shaft 3, is arranged in the casing 2 of the drilling machine 1. The end toothing 6 of the gear 5 engages the toothing 4 of the intermediate shaft 3. An engagement recess 1 is provided on the side surface 7 of the gear 5 facing the motor.
1S8 is formed. The engagement recess 8 has a depth such that preferably at least a portion of the engagement body 9 seated in the engagement recess 8 engages in the engagement recess 8 . The engaging body 9 is formed as a rolling element with an axis extending radially with respect to the gear 5. The engagement recess 8 is formed in a cylinder jacket shape corresponding to the engagement body 9. The gear 5 is acted upon by a pressure spring 1O, which is supported by a plate 13 fixed to the drive member 12. The drive member 12 is designed as a rotating sleeve. Engagement trough 1 on the opposite side from the grip
A counter coupling member 14 having a
It is formed as a brim.
例えばＤＥ３１２１６１ａＡ１号明細書にすでに記載さ
れた、往復運動を行うピストン１７を有する打撃機構１
６が、本発明の実施例に図示された管状の駆動部材１２
内に取付けられている。駆動部材１２は、内側へ向かう
連行駆動条片１９の設けられた工具受容部１８まで統い
ており、連行駆動条片１９は工Ａ２１の回転連行溝２０
内に係合している。工具受容部１８は、その他の点では
例えばＤＥ２５５１１２５Ｃ２号（ＵＳ−Ａ４１０７９
４９号）明細書による公知の構成を有している。A striking mechanism 1 with a reciprocating piston 17, as already described for example in DE 312 161aA1
6 is a tubular drive member 12 illustrated in an embodiment of the invention.
installed inside. The drive member 12 leads to the tool receiving part 18, which is provided with an inwardly entraining drive strip 19, which is connected to the rotation entrainment groove 20 of the construction A21.
engaged within. The tool receptacle 18 is otherwise constructed according to, for example, DE 2551125C2 (US-A 41079).
No. 49) It has a known configuration according to the specification.
穿孔機ｌの駆動時に、例えば鉄筋コンクリート内の補強
用鉄筋によって工具２１がブロックされると、駆動部材
１２も回転連行部材１９゜２０によって停止される。こ
れによってセフティカップリング５，１４が解離される
。この場合、係合体９は係合トラフ１５から押出される
が、歯車５の係合凹ｗ８内には留められる。その結果、
歯車５が押圧ばねｌＯの力に逆らって工具受容部１８の
方向へ移動させられる。さらに歯車５は、駆動部材１２
を連行駆動させずに、中間シャフト３によって回転駆動
される。この場合係合体９は、例えば鋼又は焼入れされ
た鋼のような耐摩耗性の材料から成る対向カップリング
部材１４に形成された係合トラフ１５との係合だけを解
除されている。それによって係合体９は、それ自身の軸
線を中心として係合口部８内で回転可能となり、かつ係
合トラフ１５上で対向カップリング部材１４に接して転
動する。歯車５は摩耗されることがないので、耐摩耗性
の低い材料、例えば焼結金属から形成されていてもよい
。If, when driving the drilling machine I, the tool 21 is blocked, for example by reinforcing bars in reinforced concrete, the drive member 12 is also stopped by the rotary entrainment member 19, 20. As a result, the safety couplings 5 and 14 are dissociated. In this case, the engaging body 9 is pushed out from the engaging trough 15, but remains in the engaging recess w8 of the gear 5. the result,
The gearwheel 5 is moved in the direction of the tool receptacle 18 against the force of the pressure spring IO. Further, the gear 5 has a drive member 12
It is rotationally driven by the intermediate shaft 3 without being driven along with it. In this case, the engagement body 9 is only disengaged from the engagement trough 15 formed in the countercoupling element 14, which is made of a wear-resistant material, such as steel or hardened steel. The engagement body 9 is thereby able to rotate within the engagement opening 8 about its own axis and rolls on the engagement trough 15 against the counter-coupling member 14 . Since the gear 5 is not subject to wear, it may also be made of a material with low wear resistance, for example sintered metal.
係合トラフ１５が深く切込みを付けられるか、又は係合
トラフ１５の側壁が急傾斜していることによって、係合
モーメントが増大される。The engagement moment is increased by the fact that the engagement trough 15 is deeply cut or the side walls of the engagement trough 15 are steeply sloped.
さらに、係合トラフ１５がより平らに形成されるにつれ
て、セフティカップリングがより早期に係合されるよう
になる。Furthermore, the flatter the engagement trough 15 is, the earlier the safety coupling will be engaged.
本発明によるセフティカップリングは、実施例に図示さ
れた位置にのみ配置されるものではなく、回転駆動系の
任意の位置に配置され得るものである。さらに、任意の
工具受容部、特にドリルチャックも使用され得る。ドリ
ルチャックが使用される場合には、ドリルチャックの側
面が駆動部材１２に回転不能に結合される。The safety coupling according to the present invention is not arranged only at the positions shown in the embodiments, but can be arranged at any position in the rotational drive system. Furthermore, any tool receptacle can be used, especially a drill chuck. If a drill chuck is used, the sides of the drill chuck are non-rotatably coupled to the drive member 12.
図面は本発明による穿孔機の１実施例を示す、穿孔機の
一部横断面図である。
！・・・穿孔機、２・・・ケーシング、３・・・中間シ
ャフト、４・・・歯列、５・・・歯車、６・・・端面歯
列、７・・・側面、８・・・係合凹部、９・・・係合体
、ｌＯ・・・押圧ばね、１２・・・駆動部材、１３・・
・プレート、１４・・・対向カップリング部材、１５・
・・係合トラフ１６・・・打撃工具、１７・・・ピスト
ン、１８・・・工具受容部、１９・・・連行駆動条片、
２０・・・回転連行溝、２１・・・工具The drawing is a partial cross-sectional view of a drilling machine, showing an embodiment of the drilling machine according to the present invention. ! ...Drilling machine, 2...Casing, 3...Intermediate shaft, 4...Tooth row, 5...Gear, 6...End face tooth row, 7...Side surface, 8... Engagement recess, 9... Engagement body, lO... Pressing spring, 12... Drive member, 13...
・Plate, 14... Opposed coupling member, 15.
... Engagement trough 16 ... Impact tool, 17 ... Piston, 18 ... Tool receiving part, 19 ... Entraining drive strip,
20... Rotation entrainment groove, 21... Tool
Claims (1)
部材によって回転駆動される工具受容部と、回転駆動系
において軸方向に作用するセフティカップリングとが設
けられており、セフティカップリングの一方のカップリ
ング部材が、側面に係合凹部を有する歯車から形成され
ており、セフティカップリングの、ばね負荷される他方
の対向カップリング部材に形成された係合トラフと協働
する係合体が、上記係合凹部内に配置されている形式の
ものにおいて、対向カップリング部材（１４）に形成さ
れた係合トラフ（１５）が、歯車（５）に形成された係
合凹部（８）よりも極めて平らになっていることを特徴
とする穿孔機２、歯車（５）に形成された係合凹部（８
）が、係合体（９）の学部よりも大きいか又は少なくと
もこの学部と同じ大きさになっていることを特徴とする
請求項１記載の穿孔機。 ３、歯車（５）に形成された係合凹部（８）が、係合体
（９）を保持するためのケージとしても役立つことを特
徴とする請求項１又は２記載の穿孔機。 ４、対向カップリング部材（１４）が、駆動部材（１２
）と一体的に形成されていることを特徴とする請求項１
から３までのいずれか１項記載の穿孔機。 ５、歯車（５）が焼結部材から成ることを特徴とする請
求項１から４までのいずれか１項記載の穿孔機。 ６、駆動部材（１２）を成す材料が、歯車（５）を成す
材料よりも極めて硬いことを特徴とする請求項１から５
までのいずれか１項記載の穿孔機。 ７、係合体（９）が係合転動体として形成されているこ
とを特徴とする請求項１から６までのいずれか１項記載
の穿孔機。 ８、セフティカップリングが解離されたさいに、係合体
（９）が比較的硬性の高い対向カップリング部材（１４
）との係合を解除されることを特徴とする請求項１から
７までのいずれか１項記載の穿孔機。 ９、請求項１から８までのいずれか１項記載の穿孔機で
あって、密閉されたエアクッションにより駆動されて打
撃部材を往復運動させるピストンを備えた空圧式打撃機
構が設けられており、打撃部材が軸方向で工具に衝突し
て打撃運動を行う形式のものにおいて、駆動部材（１２
）が管状に形成されており、かつ打撃機構（１７）を同
軸的に受容していることを特徴とする穿孔機。[Claims] 1. A drilling machine for drilling and/or striking, which is provided with a tool receiving part that is rotationally driven by a drive member, and a safety coupling that acts in the axial direction in the rotational drive system. one coupling member of the safety coupling is formed of a gear having an engagement recess on its side surface, and an engagement trough formed in the other spring-loaded opposing coupling member of the safety coupling. In the type in which an engagement body cooperating with the gear is arranged in the engagement recess, an engagement trough (15) formed in the opposing coupling member (14) is formed in the gear (5). The punching machine 2 is characterized by being much flatter than the engaging recess (8), and the engaging recess (8) formed in the gear (5).
2. Drilling machine according to claim 1, characterized in that the part of the engaging body (9) is larger than or at least as large as the part of the engaging body (9). 3. Drilling machine according to claim 1 or 2, characterized in that the engagement recess (8) formed in the gear (5) also serves as a cage for holding the engagement body (9). 4. The opposing coupling member (14) is connected to the drive member (12).
) Claim 1 characterized in that it is formed integrally with
The drilling machine according to any one of items 3 to 3. 5. Drilling machine according to any one of claims 1 to 4, characterized in that the gear (5) consists of a sintered member. 6. Claims 1 to 5, characterized in that the material forming the drive member (12) is much harder than the material forming the gear (5).
The drilling machine according to any one of the preceding items. 7. Drilling machine according to claim 1, characterized in that the engagement body (9) is designed as an engagement rolling element. 8. When the safety coupling is disengaged, the engaging body (9) is connected to the relatively hard opposing coupling member (14).
8. Drilling machine according to any one of claims 1 to 7, characterized in that it is disengaged from the drilling machine. 9. The drilling machine according to any one of claims 1 to 8, which is provided with a pneumatic impact mechanism including a piston that is driven by a sealed air cushion to reciprocate the impact member, In a type in which the striking member collides with the tool in the axial direction to perform a striking movement, the driving member (12
) is tubular in shape and coaxially receives a striking mechanism (17).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3844311A DE3844311A1 (en) | 1988-12-30 | 1988-12-30 | DRILLING MACHINE |
| DE3844311.2 | 1988-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02212006A true JPH02212006A (en) | 1990-08-23 |
Family
ID=6370519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1331468A Pending JPH02212006A (en) | 1988-12-30 | 1989-12-22 | Drilling machine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0375917B1 (en) |
| JP (1) | JPH02212006A (en) |
| DE (2) | DE3844311A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4302083A1 (en) * | 1993-01-19 | 1994-07-21 | Black & Decker Inc | Power tool, in particular power tool |
| DE19717465B4 (en) * | 1997-04-25 | 2005-08-04 | Robert Bosch Gmbh | Power tool |
| DE19903863A1 (en) * | 1999-02-01 | 2000-08-24 | Bosch Gmbh Robert | Safety clutch, especially for handheld tool, having terminating part which surrounds cage, whereby force of spring arrangement is directed radial outwards |
| GB0213289D0 (en) | 2002-06-11 | 2002-07-24 | Black & Decker Inc | Rotary hammer |
| DE102004047470A1 (en) * | 2004-09-30 | 2006-04-06 | Robert Bosch Gmbh | Hand tool, in particular drill and / or percussion hammer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE424341C (en) * | 1926-01-26 | Automat Ind Ges M B H | Drilling and thread cutting device with overload clutch | |
| DE2853293C2 (en) * | 1978-12-09 | 1983-12-29 | Jean Walterscheid Gmbh, 5204 Lohmar | Overload clutch |
| US4373923A (en) * | 1979-12-14 | 1983-02-15 | Umc Industries Inc. | Torque limiting overload coupling |
| DE8003571U1 (en) * | 1980-02-11 | 1981-12-10 | Hilti AG, 9494 Schaan | OVERLOAD CLUTCH FOR TRANSMITTING A LIMITED TORQUE |
| US4593800A (en) * | 1983-02-22 | 1986-06-10 | Helland Research & Engineering, Inc. | Torque release drive connector |
| DE3503507A1 (en) * | 1985-02-02 | 1986-08-07 | Robert Bosch Gmbh, 7000 Stuttgart | Hammer drill |
-
1988
- 1988-12-30 DE DE3844311A patent/DE3844311A1/en not_active Withdrawn
-
1989
- 1989-11-18 DE DE8989121362T patent/DE58903533D1/en not_active Expired - Lifetime
- 1989-11-18 EP EP89121362A patent/EP0375917B1/en not_active Expired - Lifetime
- 1989-12-22 JP JP1331468A patent/JPH02212006A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE3844311A1 (en) | 1990-07-05 |
| DE58903533D1 (en) | 1993-03-25 |
| EP0375917B1 (en) | 1993-02-10 |
| EP0375917A1 (en) | 1990-07-04 |
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