JPH0344411Y2 - - Google Patents
Info
- Publication number
- JPH0344411Y2 JPH0344411Y2 JP1984117710U JP11771084U JPH0344411Y2 JP H0344411 Y2 JPH0344411 Y2 JP H0344411Y2 JP 1984117710 U JP1984117710 U JP 1984117710U JP 11771084 U JP11771084 U JP 11771084U JP H0344411 Y2 JPH0344411 Y2 JP H0344411Y2
- Authority
- JP
- Japan
- Prior art keywords
- protrusion
- gear shaft
- gear
- transmission
- sliding
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 49
- 230000004323 axial length Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
- Structure Of Transmissions (AREA)
Description
【考案の詳細な説明】
イ 考案の目的
〔産業上の利用分野〕
本考案は例えば、ドリルやトルクレンチ、及び
振動ドリルその他の回転式電動工具における変速
装置に関する。[Detailed Description of the Invention] A. Purpose of the Invention [Field of Industrial Application] The present invention relates to a transmission device for, for example, a drill, a torque wrench, a vibration drill, and other rotary power tools.
従来上述変速機において、ギヤ軸のキー溝に突
起を設けた滑りキーをスライド自在にして、かつ
変速ハンドルで移動操作可能に挿入し、該滑りキ
ーの突起がスライドにより上記ギヤ軸に回転自在
に嵌合した一対の変速ギヤのキー溝と係脱自在に
噛合するよう設けてなるものは知られている。
Conventionally, in the above-mentioned transmission, a sliding key having a protrusion in the key groove of the gear shaft is inserted so as to be slidable and movable by a shift handle, and the protrusion of the sliding key slides to be rotatably attached to the gear shaft. It is known to be provided so as to be removably engaged with the key grooves of a pair of fitted transmission gears.
ところが、この変速装置は、滑りキーの移動時
に一対の変速ギヤの各キー溝が一致しないと滑り
キー溝の移動ができず円滑な変速が困難であり、
又滑りキーの移動中各変速ギヤーの両方に係合す
る部分があるので回転中に切換えを行なうことが
できない等の問題点がある。 However, with this transmission, when the sliding key is moved, if the key grooves of the pair of transmission gears do not match, the sliding key groove cannot move and smooth gear shifting is difficult.
Furthermore, since there are portions that engage with both of the transmission gears while the sliding key is moving, there is a problem in that it is impossible to perform switching while the sliding key is rotating.
本考案は上述従来装置の問題点を解消しようと
したものであり、ギヤ軸のキー溝にスライド自在
に挿入した滑りキーの突起が一対の変速ギヤの何
れとも係合しない非係合空所を一対の変速ギヤの
対向部に設けると共に、該各変速ギヤにあつて、
上記非係合空所の奥に上記突起がスライドにより
係合する係合凹部を夫々設けて構成することによ
つて、円滑に変速切換えができると共に、回転中
の切換えが可能で、しかも構造簡単にして安価に
製作できるようにしたのが、その目的である。
The present invention is an attempt to solve the above-mentioned problems of the conventional device, and is to create a non-engaging space in which the protrusion of the sliding key slidably inserted into the key groove of the gear shaft does not engage with either of the pair of transmission gears. Provided at opposing parts of a pair of transmission gears, and for each transmission gear,
By providing engagement recesses in the depths of the non-engagement spaces, into which the protrusions slide to engage, it is possible to smoothly change gears, change while rotating, and have a simple structure. The purpose was to make it possible to manufacture it at a low cost.
ロ 考案の構成
〔問題点を解決するための手段〕
即ち本考案はギヤ軸のキー溝に挿入した突起を
有する滑りキーをスライドして、上記ギヤ軸に回
転自在に嵌合し、かつ駆動ギヤと噛合する一対の
変速ギヤと夫々係脱自在に係合するようにした回
転式電動工具の変速装置において、上記滑りキー
は、一端にギヤ軸より突出する突起を、他端にス
ライド支持部を夫々設けると共に中央部はギヤ軸
より沈めた形状に形成してキー溝にスライド自在
に挿入し、一方、上記一対の変速ギヤは、上記ギ
ヤ軸にあつて、その一方を上記突起とスライド支
持部間で、他方は軸上で夫々回転自在に、かつス
ラスト支持して嵌合並設すると共に、その対向部
には上記滑りキーにおける突起との非係合空所
を、その軸方向寸法を上記突起のそれより大きく
設定して形成し、該各変速ギヤにあつて、その非
係合空所の奥には上記突起がスライドにより係合
する係合凹部を夫々形成し、これら変速ギヤと上
記滑りキーの突起を選択的に係合操作可能なるよ
う上記滑りキーのスライド支持部に切換え機構を
関連ずけて構成したことによつて前記問題点を解
決したものである。B. Structure of the invention [Means for solving the problem] That is, the present invention has a sliding key having a protrusion inserted into a key groove of a gear shaft, which slides and is rotatably fitted to the gear shaft. In the transmission device for a rotary electric power tool, the sliding key has a projection protruding from the gear shaft at one end and a slide support portion at the other end. The central part is formed in a shape sunk below the gear shaft and is slidably inserted into the keyway, while the pair of transmission gears are located on the gear shaft, one of which is connected to the projection and the slide support part. The other is rotatably and thrust-supported and fitted in parallel on the shaft, and the opposite part thereof has a space that does not engage with the projection of the sliding key, and its axial dimension is set in line with the projection. In each of the transmission gears, an engagement recess into which the projection engages by sliding is formed in the back of the non-engaging space, so that the transmission gear and the sliding The above-mentioned problem has been solved by configuring a switching mechanism associated with the sliding support portion of the sliding key so that the protrusion of the key can be selectively engaged.
以下本考案の一実施例を図面に基づいて詳述す
れば、第１図ないし第６図に示したように、ギヤ
軸１はギヤケース２内に軸受３，４にて回転自在
に支持されており、そのギヤケース２から突出し
た一端にはチヤツク５が固設させてある。
An embodiment of the present invention will be described below in detail based on the drawings. As shown in FIGS. 1 to 6, a gear shaft 1 is rotatably supported in a gear case 2 by bearings 3 and 4. A chuck 5 is fixed to one end protruding from the gear case 2.
上記ギヤ軸１の内端部よりにあつて、その一側
部にはキー溝６が軸方向に長く凹設させてあつ
て、滑りキー７が軸方向へスライド自在に挿入さ
せてある。 At one side of the inner end of the gear shaft 1, a key groove 6 is provided with a long recess in the axial direction, into which a sliding key 7 is slidably inserted in the axial direction.
上記滑りキー７は、夫々の端部にギヤ軸１の周
面から突出する突起７ａと、スライド支持部７ｂ
が設けてあると共に、該突起７ａとスライド支持
部７ｂの中央部は上記ギヤ軸１の周面より沈む狭
幅部７ｃに形成されている。 The sliding key 7 has a protrusion 7a protruding from the circumferential surface of the gear shaft 1 at each end, and a sliding support portion 7b.
The center portion of the protrusion 7a and the slide support portion 7b is formed into a narrow portion 7c sunk below the circumferential surface of the gear shaft 1.
そして、上記ギヤ軸１には高速用と低速用の一
対の変速ギヤ８，９が回転自在に、かつギヤ軸１
に掛止した止め輪１０，１１によりスラスト支持
されて嵌合並設されるのであるが、こゝで一方の
変速ギヤ９はギヤ軸１にあつて、上記滑りキー７
における突起７ａとスライド支持部７ｂとの間で
回転可能に、他方の変速ギヤ８はギヤ軸１にあつ
て、滑りキー７の突起７ａの外側に位置して回転
自在に夫々嵌合させてあると共に、上述スラスト
支持によつて両変速ギヤ８，９は相互に回転自在
に対設させてある。 A pair of speed change gears 8 and 9 for high speed and low speed are rotatably attached to the gear shaft 1.
They are thrust-supported by retaining rings 10 and 11 hooked to the retaining rings 10 and 11, and are fitted and installed in parallel.
The other transmission gear 8 is rotatably fitted between the protrusion 7a and the slide support part 7b on the gear shaft 1, located outside the protrusion 7a of the sliding key 7. Also, due to the above-mentioned thrust support, both transmission gears 8 and 9 are rotatably opposed to each other.
又、上記両変速ギヤ８，９の対向部には上記滑
りキー７における突起７ａとの非係合空所１２
が、夫々の変速ギヤ８，９における対向部の軸孔
内面を第３図に明示した如く円孔状に欠除するこ
とによつて形成させてあると共に、該非係合空所
１２の軸方向寸法L2は、上記突起７ａの軸方向
寸法L1よりも適当寸法だけ大きく形成させてあ
り、このことによつて滑りキー７の突起７ａが一
対の変速ギヤ８，９の何れにも係合しないように
してある。 Further, in the opposing portion of both the transmission gears 8 and 9, there is a space 12 that does not engage with the protrusion 7a of the sliding key 7.
is formed by cutting out the inner surface of the shaft hole of the opposing portion of each transmission gear 8, 9 in the shape of a circular hole as shown in FIG. The dimension L 2 is made larger than the axial dimension L 1 of the projection 7a by an appropriate dimension, so that the projection 7a of the sliding key 7 can be engaged with either of the pair of transmission gears 8 and 9. I'm trying not to do that.
又、上記両変速ギヤ８，９の対向部側にあつ
て、上記非係合空所１２の軸方向奥には、上記滑
りキー７のスライドにより突起７ａと係脱自在に
係合する係合凹部１３，１３′が第２図に明示し
た如く周方向へ適当間隔をおいて複数個夫々設け
てある。 Further, on the opposing side of both the transmission gears 8 and 9, at the back of the non-engaging space 12 in the axial direction, there is an engagement plate that removably engages with the protrusion 7a by sliding the slide key 7. As clearly shown in FIG. 2, a plurality of recesses 13 and 13' are provided at appropriate intervals in the circumferential direction.
こゝで上記両変速ギヤ８，９の凹部１３，１
３′は夫々同一数だけ同一形状に設けられている
ものであり、図示例では夫々四個ずつ設けてある
が、２個ない３個であつてもよく、その数は任意
であればよい。 Here, the recesses 13 and 1 of both transmission gears 8 and 9 are
3' are provided in the same number and in the same shape, and in the illustrated example, four are provided in each case, but it may be two or three, and the number may be arbitrary.
又、上記凹部１３，１３′は変速ギヤ８，９の
軸孔内面を欠除して形成されるから、周方向にあ
つて各凹部１３…，１３′…間には突部１４が当
該凹部１３と同一数設けられている。 Moreover, since the recesses 13, 13' are formed by removing the inner surfaces of the shaft holes of the transmission gears 8, 9, the protrusions 14 are located between each recess 13, 13' in the circumferential direction. The same number as 13 are provided.
又上記凹部１３，１３′の軸方向寸法は、上記
滑りキー７における突起７ａの軸方向寸法と同等
に設けられている。 Further, the axial dimension of the recesses 13, 13' is set to be equal to the axial dimension of the protrusion 7a of the sliding key 7.
又、図示例によると、一対の変速ギヤ８，９の
中心部にあつて、その両対向部には円筒部８ａ，
９ａを夫々一体に軸方向へ突出して設け、該円筒
部８ａ，９ａの内周に上記非係合空所１２と凹部
１３，１３′を設けてあるが、上記円筒部８ａ，
９ａを設けることなく変速ギヤ８，９に直接上記
非係合空所１２及び凹部１３，１３′を設けるよ
うにしてもよいことはもとよりである。 Further, according to the illustrated example, at the center of the pair of transmission gears 8 and 9, there are cylindrical portions 8a,
9a are provided integrally protruding in the axial direction, and the non-engaging space 12 and the recesses 13, 13' are provided on the inner periphery of the cylindrical portions 8a, 9a.
It goes without saying that the non-engaging spaces 12 and the recesses 13, 13' may be provided directly in the transmission gears 8, 9 without providing the gears 9a.
又、上記一対の変速ギヤ８，９は、上記ギヤ軸
１を並行にギヤケース２内に軸受１５，１５にて
回転自在に架設した中間軸１６の駆動ギヤ１７，
１８と夫々噛合させてあり、該中間軸１６は、同
軸に固設されたギヤ１９をモータ２０の軸２１に
設けたギヤ２２と噛合されることによつてモータ
２０の回転が伝達され、これにより一対の変速ギ
ヤ８，９は駆動回転される。 The pair of transmission gears 8 and 9 are driven by a drive gear 17 of an intermediate shaft 16 rotatably installed in the gear case 2 in parallel with the gear shaft 1 through bearings 15, 15.
18, and the intermediate shaft 16 transmits the rotation of the motor 20 by meshing the gear 19 fixed on the same axis with the gear 22 provided on the shaft 21 of the motor 20. As a result, the pair of transmission gears 8 and 9 are driven to rotate.
そして上記滑りキー７のスライド支持部７ｂに
は切換え機構２３が連結させてある。 A switching mechanism 23 is connected to the slide support portion 7b of the slide key 7.
上記切換え機構２３は、上記スライド支持部７
ｂに下端を掛止して立設されるガイド板２４と、
ギヤケース２の開口部２ａから一部突出させてギ
ヤケース２と上記ガイド板２４間にあつて上記ギ
ヤ軸１の軸方向へスライド自在に配置されると共
に、上記ガイド板２４の突起２４ａを係合する切
換えレバー２５と、該切換えレバー２５の一側壁
２５ａに関連ずけて上記ギヤケース２に支持され
る板バネ２６とで形成されるのであつて、上記切
換えレバー２５の一側壁２５ａには、そのスライ
ド方向へ適当な間隔を保持して平面略Ｖ字形状の
二個の凹部２５ｂ，２５ｃを設け、このことによ
り両凹部２５ｂ，２５ｃの間には平面逆Ｖ字形状
の突部２５ｄが設けてあり、一方上記板バネ２６
は、その前後両端部もしくは何れか一方端部を上
記ギヤケース２に固定することによつて側方へバ
ネ性を付勢させてあると共に、当該板バネ２６の
略中央部には上記凹部２５ｂ，２５ｃに適合する
よう平面略Ｖ字形状の突部２６ａを設けることに
よつて形成されている。 The switching mechanism 23 includes the slide support section 7
a guide plate 24 erected with its lower end hooked to b;
It is partially protruded from the opening 2a of the gear case 2 and is disposed between the gear case 2 and the guide plate 24 so as to be slidable in the axial direction of the gear shaft 1, and engages the protrusion 24a of the guide plate 24. It is formed of a switching lever 25 and a leaf spring 26 supported by the gear case 2 in relation to one side wall 25a of the switching lever 25. Two recesses 25b and 25c, which are approximately V-shaped in plan, are provided with an appropriate distance in the direction, and thereby a protrusion 25d, which is inverted V-shaped in plan, is provided between both recesses 25b, 25c. , while the leaf spring 26
The leaf spring 26 has both front and rear ends or one end thereof fixed to the gear case 2, thereby applying a spring force to the side, and the plate spring 26 is provided with the recess 25b, approximately at the center thereof. 25c is formed by providing a protrusion 26a having a substantially V-shaped planar shape.
即ち、上記両凹部２５ｂ，２５ｃと突部２６ａ
との関係は、切換えレバー２５を前方へスライド
して上記突部２６ａが一方の凹部２５ｂに係合し
た位置では、上記滑りキー７の突記７ａが一方の
変速ギヤ８の凹部１３と係合し、又この位置から
切換えレバー２５を後方へスライドして上記突部
２６ａが他方の凹部２５ｃと係合した第６図の位
置では、上記突起７ａが他方の変速ギヤ９の凹部
１３′と係合され、夫々の切換え位置を保持し得
るように設けてある。 That is, both the recesses 25b and 25c and the protrusion 26a
The relationship is that when the switching lever 25 is slid forward and the protrusion 26a engages with one of the recesses 25b, the protrusion 7a of the sliding key 7 engages with the recess 13 of one of the transmission gears 8. 6, in which the switching lever 25 is slid rearward from this position and the projection 26a engages with the other recess 25c, the projection 7a engages with the recess 13' of the other transmission gear 9. They are arranged so that they can be aligned and maintain their respective switching positions.
又上記切換えレバー２５を中立位置としたと
き、その突部２５ｄの頂部に上記突部２６ａはバ
ネ力に抗した状態で接触されるようにしてあり、
しかしてこの状態では、上記滑りキー７の突起７
ａは一対の変速ギヤ８，９の非係合空所１２にあ
つて何れの変速ギヤとも係合しないのであるが、
上記突部２５ｄは平面略逆Ｖ字形状であつて、そ
の頂部から第５図、第６図において左右両方へ傾
斜下降する傾斜面２５ｅ，２５ｆを形成している
ので、上記板バネ２６の突部２６ａは、自体のバ
ネ性により切換えレバー２５の一側壁２５ａに弾
接されることによつて上記突部２５ｄの頂部に接
触保持されることはなく、上記傾斜面２５ｅ又は
２５ｆが滑動することにより何れか一方の凹部２
５ｂ又は２５ｃと係合し、これにより正常な切換
え位置に保持されるようにしてある。 When the switching lever 25 is in the neutral position, the protrusion 26a is brought into contact with the top of the protrusion 25d against the spring force.
However, in the levered state, the protrusion 7 of the sliding key 7
A is located in the non-engaging space 12 of the pair of transmission gears 8 and 9, and does not engage with any of the transmission gears.
The protrusion 25d has a substantially inverted V-shape in plan, and forms inclined surfaces 25e and 25f that slope downward from the top to both the left and right sides in FIGS. 5 and 6, so that the protrusion of the leaf spring 26 Since the portion 26a is brought into elastic contact with the one side wall 25a of the switching lever 25 due to its own spring property, the portion 26a is not held in contact with the top of the protrusion 25d, and the inclined surface 25e or 25f does not slide. Depending on which one of the recesses 2
5b or 25c, thereby maintaining the normal switching position.
而して上記構成において、切換えレバー２５を
前方へスライドすると、滑りキー７はキー溝６に
沿つて前進し、その突起７ａは一方の変速ギヤ８
の凹部１３と第４図イに示した如く係合し、当該
ギヤ８はギヤ軸１に連結される。この状態で他方
の変速ギヤ９は上記突起７ａと係合せずギヤ軸１
上に回転自在に保持されるので、モータ軸２１の
回転はギヤ２２，１９、中間軸１６、駆動ギヤ１
７を介して変速ギヤ８及びギヤ軸１に伝達され
る。 In the above configuration, when the switching lever 25 is slid forward, the sliding key 7 moves forward along the keyway 6, and the protrusion 7a engages one of the transmission gears 8.
As shown in FIG. 4A, the gear 8 is connected to the gear shaft 1. In this state, the other transmission gear 9 does not engage with the projection 7a and gear shaft 1
Since the motor shaft 21 is rotatably held at the top, rotation of the motor shaft 21 is controlled by gears 22, 19, intermediate shaft 16, and drive gear 1
7 to the transmission gear 8 and the gear shaft 1.
上記状態から切換えレバー２５を後方へスライ
ドすると滑りキー７は後退し、その突起７ａは第
４図ハに示した如く他方の変速ギヤ９の凹部１
３′と係合するので当該ギヤ９はギヤ軸１に結合
される。このとき一方の変速ギヤ８はギヤ軸１に
回転自在に保持される。 When the switching lever 25 is slid rearward from the above state, the sliding key 7 is moved backward, and the projection 7a is inserted into the recess 1 of the other transmission gear 9 as shown in FIG.
3', the gear 9 is coupled to the gear shaft 1. At this time, one speed change gear 8 is rotatably held on the gear shaft 1.
従つて、モータ軸２１の回転は、ギヤ２２，１
９、中間軸１６、駆動ギヤ１８を介して変速ギヤ
９及びギヤ軸１に伝達される。 Therefore, the rotation of the motor shaft 21 is controlled by the gears 22,1.
9, the intermediate shaft 16, and the drive gear 18 to be transmitted to the speed change gear 9 and the gear shaft 1.
又、上記滑りキー７の移動中、その突起７ａは
一対の変速ギヤ８，９の対向部に設けた非係合空
所１２を第４図ロに示した如く通り、こゝで上記
突起７ａは両変速ギヤ８，９との係合が完全に切
り離されるのであるから、回転中でも切換えが可
能となる。 Further, while the sliding key 7 is moving, the projection 7a passes through the non-engaging space 12 provided at the opposing portion of the pair of transmission gears 8 and 9, as shown in FIG. Since the gears 8 and 9 are completely disengaged from each other, switching is possible even during rotation.
又上述切換え時にあつて、上記突起７ａが凹部
１３…，１３′…間の突部１４と当接することが
あるが、かゝる場合は、切換えレバー２５の傾斜
面２５ｄ又は２５ｅが板バネ２６の突部２６ａと
弾接されることにより、そのバネ力によつて切換
えレバー２５はスライドし、上記突部２６ａと凹
部２５ｂ又は２５ｃは自動的に係合されることに
よつて、上記突起７ａと所望変速ギヤ８又は９の
凹部１３又は１３′は係合し、正常な切換えが行
なわれるのである。 Also, during the above-mentioned switching, the protrusion 7a may come into contact with the protrusion 14 between the recesses 13..., 13'. By being in elastic contact with the protrusion 26a, the switching lever 25 slides due to its spring force, and the protrusion 26a and the recess 25b or 25c are automatically engaged, so that the protrusion 7a The recessed portion 13 or 13' of the desired transmission gear 8 or 9 engages with the recessed portion 13 or 13' of the desired transmission gear 8 or 9, and normal switching is performed.
本考案は以上説明したように構成したものであ
るから、滑りキー７をスライドすることにより、
その一端に設けた突起７ａは、一対の変速ギヤ
８，９の対向部に設けた突起７ａとの非係合空所
１２を通過するものであつて、当該非係合空所１
２で両変速ギヤ８，９との係合が完全に切り離さ
れた後、何れか一方の変速ギヤ８又は９の凹部１
３又は１３′と係合するので上記突起７ａの共通
な係合部分はないから、変速切換えを円滑にでき
て、かつ回転中に切換えを行なうことができ、又
上記突起７ａは滑りキー７の一端にのみ設ければ
よく、かつ一方の変速ギヤだけを滑りキー７のギ
ヤ軸１から沈んだ位置に回転自在に嵌合すればよ
いので、上記滑りキー７及びキー溝６の軸方向長
さを短かくすることができることによつて、この
種装置の簡略化と小型を図り得る等の効果があ
る。
Since the present invention is constructed as explained above, by sliding the sliding key 7,
The protrusion 7a provided at one end passes through a non-engagement space 12 with the protrusion 7a provided on the opposing portions of the pair of transmission gears 8 and 9.
2, after the engagement with both transmission gears 8 and 9 is completely disconnected, the recess 1 of either transmission gear 8 or 9
3 or 13', there is no common engagement part of the protrusion 7a, so the gear change can be made smoothly and can be done during rotation. Since it is only necessary to provide it at one end, and only one transmission gear needs to be rotatably fitted in a position submerged from the gear shaft 1 of the sliding key 7, the axial length of the sliding key 7 and the key groove 6 By being able to shorten the length, this type of device can be simplified and made smaller.
第１図は本考案に係る回転式電動工具の変速装
置を備えた電動工具の一実施例を一部断面して示
した側面図、第２図、第３図は第１図における
−線、−線各矢視拡大横断面図、第４図
イ，ロ，ハは同装置の切換え作動状態を夫々示し
た各縦断側面図、第５図、第６図は同装置におけ
る切換え機構の作動状態を夫々示した各平面図で
ある。
１……ギヤ軸、６……キー溝、７……滑りキ
ー、７ａ……突起、７ｂ……スライド支持部、
８，９……一対の変速ギヤ、１２……非係合空
所、１３，１３′……係合凹部、１７，１８……
駆動ギヤ、２３……切換え機構。
FIG. 1 is a partially sectional side view of an embodiment of a power tool equipped with a transmission device for a rotary power tool according to the present invention, and FIGS. 2 and 3 are - lines in FIG. - Line enlarged cross-sectional views taken along the arrows; Figures 4 A, B, and C are longitudinal sectional side views showing the switching operation states of the same device; Figures 5 and 6 are the operating states of the switching mechanism in the same device. FIG. DESCRIPTION OF SYMBOLS 1... Gear shaft, 6... Keyway, 7... Sliding key, 7a... Protrusion, 7b... Slide support part,
8, 9...Pair of transmission gears, 12...Non-engaging space, 13,13'...Engaging recess, 17,18...
Drive gear, 23... switching mechanism.
Claims (1)
りキー７をスライドして、上記ギヤ軸に回転自在
に嵌合され、かつ駆動ギヤ１７，１８と噛合する
一対の変速ギヤ８，９と夫々係脱自在に係合する
よう設けてなる回転式電動工具の変速装置におい
て、上記滑りキーは、一端にギヤ軸より突出する
突起７ａを、他端にスライド支持部７ｂを夫々設
けると共に中央部はギヤ軸より沈めた形状に形成
してキー溝にスライド自在に挿入し、一方、上記
一対の変速ギヤは、上記ギヤ軸にあつて、その一
方を上記突起とスライド支持部間で、他方は軸上
で夫々回転自在に、かつスラスト支持して嵌合並
設すると共に、その対向部には上記滑リキーにお
ける突起との非係合空所１２を、その軸方向寸法
を上記突起のそれより大きく設定して形成し、該
各変速ギヤにあつてその非係合空所の奥には上記
突起がスライドにより係合する係合凹部１３，１
３′を夫々形成し、これら変速ギヤと上記滑りキ
ーの突起を選択的に係合操作可能なるよう上記滑
りキーのスライド支持部に切換え機構２３を関連
ずけてなることを特徴とする回転式電動工具の変
速装置。 A sliding key 7 having a protrusion inserted into a key groove 6 of the gear shaft 1 is slid to connect a pair of transmission gears 8 and 9 which are rotatably fitted to the gear shaft and mesh with drive gears 17 and 18, respectively. In a transmission device for a rotary power tool which is configured to engage and disengage freely, the sliding key has a protrusion 7a projecting from the gear shaft at one end, a slide support portion 7b at the other end, and a center portion. The pair of transmission gears are formed into a shape that is sunken below the gear shaft and are slidably inserted into the key groove, and the pair of transmission gears are mounted on the gear shaft with one of them between the projection and the slide support part and the other between the shaft and the gear shaft. They are rotatably and thrust-supported and fitted in parallel on the top of each of the slide keys, and at the opposing part thereof, a space 12 that does not engage with the projection of the sliding key is set so that its axial dimension is larger than that of the projection. The engagement recesses 13, 1 are formed in each transmission gear, and at the back of the non-engagement space, the projections engage by sliding.
3', and a switching mechanism 23 is associated with the sliding support portion of the sliding key so that these transmission gears and the protrusion of the sliding key can be selectively engaged with each other. Transmission device for power tools.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11771084U JPS6142211U (en) | 1984-07-30 | 1984-07-30 | Rotary power tool gearbox |
| DE19853526150 DE3526150A1 (en) | 1984-07-30 | 1985-07-22 | Gear shift for a motor-driven tool carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11771084U JPS6142211U (en) | 1984-07-30 | 1984-07-30 | Rotary power tool gearbox |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6142211U JPS6142211U (en) | 1986-03-18 |
| JPH0344411Y2 true JPH0344411Y2 (en) | 1991-09-18 |
Family
ID=14718388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11771084U Granted JPS6142211U (en) | 1984-07-30 | 1984-07-30 | Rotary power tool gearbox |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6142211U (en) |
| DE (1) | DE3526150A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3610820A1 (en) * | 1986-04-01 | 1987-10-15 | Fein C & E | MOTOR DRIVEN MACHINE WITH TORQUE ADJUSTMENT, ESPECIALLY ELECTRIC HAND TOOL |
| DE3904085A1 (en) * | 1989-02-11 | 1990-08-23 | Licentia Gmbh | Electric tool with a multi-step reduction gear and with a device, actuable at standstill, for changing the gear |
| JP2518286Y2 (en) * | 1989-06-12 | 1996-11-27 | 株式会社新興製作所 | Card collection device |
| DE4213291C2 (en) * | 1992-04-23 | 1997-12-04 | Atlas Copco Elektrowerkzeuge | Gear device of a hand-held rotary hammer machine |
| DE4422368A1 (en) * | 1994-06-27 | 1996-01-18 | Hans Graffe | Close=ratio automotive gearbox |
| DE10007665A1 (en) * | 2000-02-19 | 2001-09-06 | Scintilla Ag | Machine tool |
| DE10149382C1 (en) * | 2001-10-06 | 2003-05-08 | Bosch Gmbh Robert | Device for switching a two-stage transmission of a power tool |
| DE10156392B4 (en) * | 2001-11-16 | 2008-04-10 | Robert Bosch Gmbh | Gear shift device for a multistage transmission of a power tool |
| DE102009005248A1 (en) * | 2009-01-13 | 2010-07-15 | C. & E. Fein Gmbh | Power tool with switchable gearbox |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5859711A (en) * | 1981-10-05 | 1983-04-08 | Matsushita Electric Works Ltd | Speed change gear of electromotive rotary tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2936996A1 (en) * | 1979-09-13 | 1981-04-02 | Scintilla Ag, Solothurn | MOTOR DRIVEN TOOL |
-
1984
- 1984-07-30 JP JP11771084U patent/JPS6142211U/en active Granted
-
1985
- 1985-07-22 DE DE19853526150 patent/DE3526150A1/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5859711A (en) * | 1981-10-05 | 1983-04-08 | Matsushita Electric Works Ltd | Speed change gear of electromotive rotary tool |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3526150C2 (en) | 1989-07-20 |
| DE3526150A1 (en) | 1986-02-06 |
| JPS6142211U (en) | 1986-03-18 |
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