JPH10100073A - Impact wrench - Google Patents
Impact wrenchInfo
- Publication number
- JPH10100073A JPH10100073A JP25826196A JP25826196A JPH10100073A JP H10100073 A JPH10100073 A JP H10100073A JP 25826196 A JP25826196 A JP 25826196A JP 25826196 A JP25826196 A JP 25826196A JP H10100073 A JPH10100073 A JP H10100073A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- impact wrench
- cylinder
- hole
- force
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01C13/02—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving hand-held tools or the like
-
- 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
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
- F01C20/04—Control of, monitoring of, or safety arrangements for, machines or engines specially adapted for reversible machines or engines
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はインパクトレンチに
関し、特に、逆転時のボルト等の取り外しが、正転時の
ボルト等の締め付け力より大であるインパクトレンチに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact wrench, and more particularly to an impact wrench in which removal of bolts or the like during reverse rotation is greater than the tightening force of bolts or the like during forward rotation.
【０００２】[0002]
【従来の技術】インパクトレンチは、ボルトやナット等
の締め付け・取り外しに使用される空気工具であるが、
従来のインパクトレンチでは、ボルト等を締め付ける力
と取り外す力が等しくなるように、モ−タ−部やクラッ
チハンマ−部が構成されていた。2. Description of the Related Art Impact wrenches are pneumatic tools used for tightening and removing bolts and nuts.
In a conventional impact wrench, a motor portion and a clutch hammer portion are configured such that a force for fastening a bolt or the like and a force for removing the bolt are equal.
【０００３】上記の構成の従来のインパクトレンチは、
ボルト等を締め付ける時には、何等問題は生じないが、
締め付けたボルト等を同じインパクトレンチで取り外す
時に、取り外し力が締め付け力とが等しいために、ボル
ト等を取り外すのに時間がかかり、取り外し作業が非効
率になりがちであった。A conventional impact wrench having the above structure is
When tightening bolts etc., no problem occurs,
When the tightened bolts and the like are removed with the same impact wrench, since the removal force is equal to the tightening force, it takes time to remove the bolts and the like, and the removal work tends to be inefficient.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記の問題
点を考慮し、ボルト等の取り外し力を締め付け力よりも
大とし、締め付けたボルト等を容易に取り外すことので
きるインパクトレンチを提供することを課題とする。SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an impact wrench in which the force for removing bolts and the like is greater than the tightening force, and the bolts and the like tightened can be easily removed. That is the task.
【０００５】[0005]
【課題を解決するための手段】本発明に係るインパクト
レンチは、半径方向に往復動可能なロ−タ−ブレ−ドが
放射状に複数枚配設されたロ−タ−が、シリンダ−内を
正逆回転可能に軸支されたモ−タ−部と、前記ロ−タ−
の駆動軸に連結されるクラッチハンマ−部と、前記クラ
ッチハンマ−部から打撃力を受けて回転するアンビル部
と、を有して成るインパクトレンチであって、前記シリ
ンダ−に、長手方向に貫通する正転時給気穴と逆転時給
気穴とが左右対称に形成されるとともに、前記シリンダ
−の側面に、頂部から正転時給気穴の方向へ角度θだけ
ずらした位置に排気穴が形成されている。なお、前記角
度θは１０°〜２０°であるのが好ましい。SUMMARY OF THE INVENTION An impact wrench according to the present invention has a rotor in which a plurality of radially reciprocable rotor blades are radially arranged. A motor portion rotatably supported in a forward / reverse direction;
An impact wrench comprising: a clutch hammer portion connected to the drive shaft of claim 1; and an anvil portion that rotates by receiving a striking force from the clutch hammer portion, and penetrates the cylinder in a longitudinal direction. A forward rotation air supply hole and a reverse rotation air supply hole are formed symmetrically, and an exhaust hole is formed on the side surface of the cylinder at a position shifted from the top by an angle θ in the direction of the normal rotation air supply hole. ing. Note that the angle θ is preferably 10 ° to 20 °.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態の一例
を図面に基づいて説明する。インパクトレンチ１は、図
１に示すように、ハンドル部１８の下端に螺合されたホ
−スアダプタ−２の入気口２ａから圧縮空気を導入す
る。ハンドル部１８の上方に回動可能に設けられたトリ
ガ−３を回動軸３ａを中心に反時計まわりに回動させて
（図の矢印方向）、トリガ−ピン１９を下方に押し下げ
ることにより、ばね１７により上向きに付勢され、ショ
ルダ部１８ａに圧接されているバルブステム４を開ける
と圧縮空気は空気通路１８ｂに導入される。ハンドル部
１８の下端に配設されたエア−レギュレ−タ５には円筒
部５ａに径のそれぞれ異なる調整穴５ｂが複数設けられ
ており、ツマミ５ｃを回して空気圧の調整を行う。圧縮
空気は調整穴５ｂを通過して空気通路１８ｃに導入され
る。An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the impact wrench 1 introduces compressed air from an inlet 2 a of a hose adapter 2 screwed to a lower end of the handle portion 18. By rotating the trigger-3 provided rotatably above the handle portion 18 counterclockwise around the rotation shaft 3a (in the direction of the arrow in the figure), the trigger pin 19 is pushed down, When the valve stem 4 urged upward by the spring 17 and pressed against the shoulder portion 18a is opened, the compressed air is introduced into the air passage 18b. The air regulator 5 provided at the lower end of the handle portion 18 has a plurality of adjusting holes 5b having different diameters in the cylindrical portion 5a, and the knob 5c is turned to adjust the air pressure. The compressed air passes through the adjustment hole 5b and is introduced into the air passage 18c.
【０００７】リバ−スバルブ６は、モ−タ−ハウジング
２０の下部に嵌挿されたブシュ２１内に前後方向に摺動
可能に保持されている。ブシュ２１にはハンドル部１８
の空気通路１８ｃと通ずる穴２１ａが形成されている。
リバ−スバルブ６の中央部には小径部６ａ，６ｂが２カ
所形成されている。リバ−スバルブ６を前方に移動させ
ると、小径部６ａがブシュ２１の穴２１ａの位置に配置
され、圧縮空気は小径部６ａを通過してインパクトレン
チが締付方向（正転方向）となるようにモ−タ−ハウジ
ング２０内の空気通路（図示せず）に振り分けられ、ま
たリバ−スバルブ６を後方に移動させると、小径部６ｂ
が穴２１ａの位置に配置され、圧縮空気は小径部６ｂを
通過して、インパクトレンチが戻し方向（逆転方向）と
なるようにモ−タ−ハウジング２０内の空気通路（図示
せず）に振り分けられる。そして、圧縮空気はエンドキ
ャップ７の内側に左右対称に形成された通路７ａのどち
らか一方を通って、リヤ−プレ−ト１２に左右対称に形
成された穴１２ａのどちらか一方からモ−タ−部８に導
入され、後述する排気穴１５ｂから排出されて、最終的
には圧縮空気は、デフレクタ−排気口９から大気中に排
出される。一方、モ−タ−部８で発生させた回転力は、
クラッチハンマ−部１０に伝えられ、その打撃機構によ
りアンビル部１１に打撃力を与えて主軸１１ａを回転さ
せる。The reverse valve 6 is held slidably in the front-rear direction in a bush 21 inserted into the lower part of the motor housing 20. The bush 21 has a handle 18
A hole 21a communicating with the air passage 18c is formed.
Two small diameter portions 6a and 6b are formed at the center of the reverse valve 6. When the reverse valve 6 is moved forward, the small diameter portion 6a is arranged at the position of the hole 21a of the bush 21, and the compressed air passes through the small diameter portion 6a so that the impact wrench is in the tightening direction (forward rotation direction). When the reverse valve 6 is moved rearward to the air passage (not shown) in the motor housing 20, the small diameter portion 6b
Is disposed at the position of the hole 21a, and the compressed air passes through the small-diameter portion 6b and is distributed to an air passage (not shown) in the motor housing 20 so that the impact wrench moves in the return direction (reverse direction). Can be The compressed air passes through either one of the passages 7a formed symmetrically inside the end cap 7 and from one of the holes 12a formed symmetrically in the rear plate 12 through the motor. The compressed air is introduced into the negative portion 8 and is discharged from an exhaust hole 15b described later. Finally, the compressed air is discharged into the atmosphere from the deflector-exhaust port 9. On the other hand, the rotational force generated by the motor unit 8 is
The driving force is transmitted to the clutch hammer unit 10 and the striking mechanism applies a striking force to the anvil unit 11 to rotate the main shaft 11a.
【０００８】図２はモ−タ−部を分解した状態を示す斜
視図であり、モ−タ−部８は、リヤ−プレ−ト１２、ロ
−タ−１３、ロ−タ−ブレ−ド１４ａ〜１４ｆ、シリン
ダ−１５、フロントプレ−ト１６等により構成され、モ
−タ−ハウジング２０内に組込れている。ロ−タ−１３
には長手方向に延びる溝１３ｂが放射状に形成され、こ
の例では６枚のロ−タ−ブレ−ド１４ａ〜１４ｆが溝１
３ｂにはめ込まれ、ロ−タ−の半径方向に往復動可能に
配設されている。FIG. 2 is a perspective view showing a state in which the motor part is disassembled. The motor part 8 includes a rear plate 12, a rotor 13, and a rotor blade. 14 a to 14 f, a cylinder 15, a front plate 16, and the like, which are incorporated in the motor housing 20. Rotor-13
A groove 13b extending in the longitudinal direction is formed radially, and in this example, six rotor blades 14a to 14f are formed in the groove 1.
3b so as to be able to reciprocate in the radial direction of the rotor.
【０００９】シリンダ−１５の前端はフロントプレ−ト
１６により、後端はリヤ−プレ−ト１２により覆われて
いる。リヤ−プレ−ト１２には軸受１２ｂが固着され、
またフロントプレ−ト１６にも軸受（図示せず）が固着
され、ロ−タ−１３の駆動軸１３ａは、これらの軸受に
より回転可能に支持されている。また、駆動軸１３ａの
クラッチハンマ−部１０側の軸端にはスプライン歯１３
ｃが形成され、クラッチハンマ−部１０のボス部（図示
せず）と嵌合により連結される。A front end of the cylinder 15 is covered by a front plate 16 and a rear end of the cylinder 15 is covered by a rear plate 12. A bearing 12b is fixed to the rear plate 12,
A bearing (not shown) is also fixed to the front plate 16, and the drive shaft 13a of the rotor 13 is rotatably supported by these bearings. A spline tooth 13 is provided on the shaft end of the drive shaft 13a on the clutch hammer portion 10 side.
c is formed, and connected to the boss portion (not shown) of the clutch hammer portion 10 by fitting.
【００１０】図３はモ−タ−部の動作説明図であり、正
転時のロ−タ−１３、ロ−タ−ブレ−ド１４ａ〜１４ｆ
とシリンダ−１５との作動を説明するものである。上記
リバ−スバルブ６を正転方向に設定するとリヤ−プレ−
ト１２の左側に形成された穴１２ａから圧縮空気はモ−
タ−部８に導入される。そして、シリンダ−１５内に
は、シリンダ−１５の三日月形状の段差部１５ｅに形成
された正転時給気穴１５ａから圧縮空気が導入されて、
ロ−タ−１３はその軸心Ｏを中心に図中の矢印の方向に
正回転する。なお、ロ−タ−１３の軸心Ｏは、シリンダ
−１５の中心Ｏcとは偏心した位置にある。このとき圧
縮空気の圧力を受けている３枚のロ−タ−ブレ−ド１４
ａ〜１４ｃの作動面積Ｗx(図の斜線部）内に存在する圧
縮空気が回転力として作用する。そして、圧縮空気はシ
リンダ−１５の頂部１５ｄから適宜の角度θの位置に形
成された排気穴１５ｂへ排出される。なお、排気穴１５
ｂは長手方向に複数個所形成されるのが望ましい（図２
参照）。FIG. 3 is a view for explaining the operation of the motor unit, and shows the rotor 13 and rotor blades 14a to 14f during normal rotation.
And the operation of the cylinder-15. When the reverse valve 6 is set in the forward direction, the rear press
The compressed air flows through a hole 12a formed on the left side of
It is introduced into the tar section 8. Compressed air is introduced into the cylinder 15 from the forward rotation supply air hole 15a formed in the crescent-shaped step portion 15e of the cylinder 15,
The rotor 13 rotates forward about the axis O in the direction of the arrow in the figure. The axis O of the rotor 13 is located eccentrically from the center Oc of the cylinder 15. At this time, the three rotor blades 14 receiving the pressure of the compressed air
Compressed air existing in the working area Wx (hatched portion in the figure) of a to 14c acts as a rotational force. The compressed air is discharged from the top 15d of the cylinder 15 to an exhaust hole 15b formed at a position at an appropriate angle θ. The exhaust hole 15
b is preferably formed at a plurality of locations in the longitudinal direction (FIG. 2).
reference).
【００１１】図４は同じくモ−タ−部の動作説明図であ
り、逆転時の作動を説明するものである。上記リバ−ス
バルブ６を逆転方向に設定すると、リヤ−プレ−ト１２
の右側に形成された穴１２ａから圧縮空気はモ−タ−部
８に導入される。そして、シリンダ−１５内には、正転
時給気穴１５ａとは左右対称に三日月形状の段差部１５
ｆに形成されている逆転時給気穴１５ｃから圧縮空気が
導入され、ロ−タ−１３はその軸心Ｏを中心に図中の矢
印の方向に逆回転する。このとき圧縮空気の圧力を受け
るロ−タ−ブレ−ド１４ｄ・１４ｅの作動面積Ｗy(図の
斜線部）内に存在する圧縮空気が回転力として作用す
る。そして、圧縮空気は排気穴１５ｂへ排出される。FIG. 4 is a view for explaining the operation of the motor unit, and explains the operation at the time of reverse rotation. When the reverse valve 6 is set in the reverse direction, the rear plate 12
Compressed air is introduced into the motor section 8 through a hole 12a formed on the right side of the motor. The cylinder 15 has a crescent-shaped stepped portion 15 symmetrically with the air supply hole 15a during normal rotation.
Compressed air is introduced from the reverse rotation air supply hole 15c formed at f, and the rotor 13 reversely rotates around its axis O in the direction of the arrow in the figure. At this time, the compressed air existing in the working area Wy (hatched portion in the drawing) of the rotor blades 14d and 14e which receives the pressure of the compressed air acts as a rotating force. Then, the compressed air is discharged to the exhaust hole 15b.
【００１２】このように、本発明によれば、排気穴がシ
リンダ−の側面に、頂部から正転時給気穴の方向に角度
θだけずらした位置に形成されているので、逆転時の作
動面積Ｗyが正転時の作動面積Ｗxより大となり、回転力
は逆転時の方が大きくなり、取り外し力を締め付け力よ
り大きくすることができる。なお、前記角度θは、１０
°〜２０°であるのが好ましい。ここで１０°未満の場
合、逆転時の作動面積Ｗyが正転時の作動面積Ｗxと左程
変わらなくなるため、締め付けたボルト等を容易に取り
外すことのできるインパクトレンチを提供することがで
きなくなるおそれがある。また、２０°を越えると、正
転時の作動面積Ｗxが小さくなりすぎるため、適正な締
め付け力が得られなくなるおそれがある。As described above, according to the present invention, since the exhaust hole is formed on the side surface of the cylinder at a position shifted from the top by the angle θ in the direction of the forward supply air hole, the operating area at the time of reverse rotation is formed. Wy becomes larger than the operating area Wx at the time of normal rotation, the rotational force becomes larger at the time of reverse rotation, and the removing force can be made larger than the tightening force. Note that the angle θ is 10
It is preferable that the angle is from 20 to 20 °. If the angle is less than 10 °, the operating area Wy at the time of reverse rotation does not change to the left from the operating area Wx at the time of normal rotation, so that it may not be possible to provide an impact wrench that can easily remove a tightened bolt or the like. There is. On the other hand, if the angle exceeds 20 °, the operating area Wx at the time of normal rotation becomes too small, so that an appropriate tightening force may not be obtained.
【００１３】[0013]
【発明の効果】本発明に係るインパクトレンチは、シリ
ンダ−に形成される排気穴の位置を変えるだけでボルト
等の取り外し力を締め付け力より大きくすることができ
る。このように、最小限の設計変更で、締め付けたボル
ト等を容易に取り外すことのできるインパクトレンチを
提供することができる。According to the impact wrench of the present invention, the removal force of bolts or the like can be made larger than the tightening force only by changing the position of the exhaust hole formed in the cylinder. As described above, it is possible to provide an impact wrench capable of easily removing a tightened bolt or the like with a minimum design change.
【図１】本発明に係るインパクトレンチの構造を示す斜
視図。FIG. 1 is a perspective view showing the structure of an impact wrench according to the present invention.
【図２】モ−タ−部を分解した状態を示す斜視図。FIG. 2 is a perspective view showing a state where a motor part is disassembled.
【図３】モ−タ−部の正転時の作動を説明する動作説明
図。FIG. 3 is an operation explanatory diagram for explaining an operation at the time of forward rotation of a motor unit.
【図４】モ−タ−部の逆転時の作動を説明する動作説明
図。FIG. 4 is an operation explanatory diagram for explaining an operation at the time of reverse rotation of a motor unit.
１ インパクトレンチ ２ ホ−スアダプタ
− ３ トリガ− ４ バルブステム ５ エア−レギュレ−タ ６ リバ−スバルブ ７ エンドキャップ ８ モ−タ−部 ９ デフレクタ−排気口 10 クラッチハンマ
−部 11 アンビル部 11a 主軸 12 リヤ−プレ−ト 13 ロ−タ− 14a〜14f ロ−タ−ブレ−ド 15 シリンダ− 15a，15c 給気穴 15b 排気穴 16 フロントプレ−ト 17 ばね 18 ハンドル部 18a ショルダ部 19 トリガ−ピン 20 モ−タ−ハウジ
ング 21 ブシュREFERENCE SIGNS LIST 1 impact wrench 2 hose adapter 3 trigger 4 valve stem 5 air regulator 6 reverse valve 7 end cap 8 motor section 9 deflector-exhaust port 10 clutch hammer section 11 anvil section 11a spindle 12 Rear plate 13 Rotor 14a to 14f Rotor blade 15 Cylinder 15a, 15c Air supply hole 15b Exhaust hole 16 Front plate 17 Spring 18 Handle 18a Shoulder 19 Trigger pin 20 Motor housing 21 bush
Claims (2)
ドが放射状に複数枚配設されたロ−タ−が、シリンダ−
内を正逆回転可能に軸支されたモ−タ−部と、前記ロ−
タ−の駆動軸に連結されるクラッチハンマ−部と、前記
クラッチハンマ−部から打撃力を受けて回転するアンビ
ル部と、を有して成るインパクトレンチであって、 前記シリンダ−に、長手方向に貫通する正転時給気穴と
逆転時給気穴とが左右対称に形成されるとともに、 前記シリンダ−の側面に、頂部から正転時給気穴の方向
へ適宜の角度θだけずらした位置に排気穴が形成されて
いることを特徴とするインパクトレンチ。A rotor blade capable of reciprocating in a radial direction.
A rotor with a plurality of radially arranged blades is
A motor part rotatably supported in the inside so as to be able to rotate forward and backward;
An impact wrench comprising: a clutch hammer portion connected to a drive shaft of a rotor; and an anvil portion that rotates by receiving a striking force from the clutch hammer portion. A forward rotation air supply hole and a reverse rotation air supply hole are formed to be symmetrical with each other, and are exhausted to the side of the cylinder at a position shifted from the top by a suitable angle θ in the direction of the normal rotation air supply hole. An impact wrench, wherein a hole is formed.
項１記載のインパクトレンチ。2. The impact wrench according to claim 1, wherein the angle θ is 10 ° to 20 °.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25826196A JPH10100073A (en) | 1996-09-30 | 1996-09-30 | Impact wrench |
| EP97102332A EP0832721A1 (en) | 1996-09-30 | 1997-02-13 | Impact wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25826196A JPH10100073A (en) | 1996-09-30 | 1996-09-30 | Impact wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10100073A true JPH10100073A (en) | 1998-04-21 |
Family
ID=17317782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25826196A Pending JPH10100073A (en) | 1996-09-30 | 1996-09-30 | Impact wrench |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0832721A1 (en) |
| JP (1) | JPH10100073A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302873B (en) | 2012-06-01 | 2016-09-28 | 阿特拉斯·科普柯工业技术公司 | Reversible pneumatic type sliding-vane motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3181672A (en) * | 1961-06-20 | 1965-05-04 | Gardner Denver Co | Tension control wrench |
| US3951217A (en) * | 1974-09-03 | 1976-04-20 | Chicago Pneumatic Tool Company | Impact air wrench having a two position pressure regulator |
| US4418764A (en) * | 1981-07-14 | 1983-12-06 | Giken Kogyo Kabushiki Kaisha | Fluid impulse torque tool |
| US4740144A (en) * | 1987-05-04 | 1988-04-26 | Dresser Industries, Inc. | Reversible radial vane air motor |
| US5293747A (en) * | 1992-07-27 | 1994-03-15 | Ingersoll-Rand Company | Power regulator for a pressure fluid motor |
-
1996
- 1996-09-30 JP JP25826196A patent/JPH10100073A/en active Pending
-
1997
- 1997-02-13 EP EP97102332A patent/EP0832721A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0832721A1 (en) | 1998-04-01 |
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