JPS6044115B2 - Automatic tool tightening torque detection device - Google Patents
Automatic tool tightening torque detection deviceInfo
- Publication number
- JPS6044115B2 JPS6044115B2 JP7726081A JP7726081A JPS6044115B2 JP S6044115 B2 JPS6044115 B2 JP S6044115B2 JP 7726081 A JP7726081 A JP 7726081A JP 7726081 A JP7726081 A JP 7726081A JP S6044115 B2 JPS6044115 B2 JP S6044115B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical body
- drive shaft
- tightening torque
- automatic tool
- reaction 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.)
- Expired
Links
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
【発明の詳細な説明】
この発明は、モータの回転力を伝達機構を介して駆動
軸に伝える自動工具の締付トルクの検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tightening torque detection device for an automatic tool that transmits the rotational force of a motor to a drive shaft via a transmission mechanism.
従来、この種の締付トルクの検出装置は、駆動軸に遊
嵌した均一な肉厚の円筒体の一端を固定端とし、その他
端を駆動軸の回転力の反力を受ける自由端として、上記
反力により円筒体をねじり、その変位置を機械的信号と
して取り出すように構成している。 しカルながら、上
記の如き従来の構成では、締付トルクを機械的に検出し
ているために、どうしても締付トルクを精確に検出する
ことができず、また、ねじりによる均一な肉厚の円筒体
の変位置が小さいために、その機械的信号によりエアモ
ータ用のシャッターバルブ等を確実に制御することがで
きないという不具合があつた。Conventionally, this type of tightening torque detection device has one end of a cylindrical body of uniform thickness that is loosely fitted to the drive shaft as a fixed end, and the other end as a free end that receives the reaction force of the rotational force of the drive shaft. The cylindrical body is twisted by the reaction force, and the displaced position is extracted as a mechanical signal. However, in the conventional configuration as described above, since the tightening torque is detected mechanically, it is impossible to accurately detect the tightening torque. Since the displacement of the body was small, there was a problem in that the shutter valve for the air motor, etc. could not be reliably controlled by the mechanical signal.
この発明は、上記不具合を除去すべくなしたもので、
自動工具の駆動軸に遊嵌され、一端を固定端とし他端を
上記駆動軸の回転力の反力を受ける自由端とする円筒体
の一端部を薄肉に形成する一方、その他端部を厚肉に形
成すると共に、該他端部に軸方向の長穴を設け、上記一
端部にストレインゲージを付着することにより、上記反
力による一端部のそれに比例する歪量をストレインゲー
ジで電気的に検出して締付トルクを精度高く検出できる
一方、上記反力による他端の変位置を、上記長穴を有す
る他端部の大きな歪により大きな機械的信号として取り
出せるようにした自動工具の締付トルクの検出装置を新
規に提供することを目的としている。This invention was made to eliminate the above-mentioned problems.
One end of the cylindrical body is loosely fitted onto the drive shaft of an automatic tool, with one end being a fixed end and the other end being a free end that receives the reaction force of the rotational force of the drive shaft, while the other end is made thick. By forming an elongated hole in the axial direction at the other end and attaching a strain gauge to the one end, the strain gauge can electrically measure the amount of strain in the one end proportional to the reaction force. This is an automatic tool tightening method in which the tightening torque can be detected with high accuracy, and the displacement of the other end due to the reaction force can be extracted as a large mechanical signal due to the large distortion of the other end having the elongated hole. The purpose is to provide a new torque detection device.
以下、この発明を図示の実施例により詳細に説明する
。Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.
第１図において、１はケース、２はモータの一例とし
てのエアモータ、３はエアモータ２と同軸に設けた駆動
軸、４は第１遊星歯車桟橋５と第２遊星歯車機構６とか
らなる伝達機構、７はエアモータ２の下部に設けられて
その駆動を制御するシャッターバルブであつて、上記エ
アモータ２の回転力は第１、第２遊星歯車機構５，６に
より順次増力されて駆動軸３に伝えられ、かつ駆動軸３
の回転速度は第１、第２遊星歯車機構５，６により減速
されるようになつている。In FIG. 1, 1 is a case, 2 is an air motor as an example of a motor, 3 is a drive shaft provided coaxially with the air motor 2, and 4 is a transmission mechanism consisting of a first planetary gear pier 5 and a second planetary gear mechanism 6. , 7 is a shutter valve provided at the bottom of the air motor 2 to control its drive, and the rotational force of the air motor 2 is sequentially amplified by the first and second planetary gear mechanisms 5 and 6 and transmitted to the drive shaft 3. and drive shaft 3
The rotational speed of is reduced by first and second planetary gear mechanisms 5 and 6.
一方、１１は駆動軸３に遊嵌され、一端のフランジ１２
をボルト１３でケース１の先端１ａに固定すると共に、
自由端である他端１４に第２遊星歯車機構６のインター
ナルギヤー１５を固定した円筒体てあつて、第２遊星歯
車機構６の遊星歯車１６の反力を上記インターナルギヤ
ー１５を介して上記他端１４に伝えて、円筒体１１に捩
りモーメントを作用させるようにしている。On the other hand, 11 is loosely fitted to the drive shaft 3 and has a flange 12 at one end.
is fixed to the tip 1a of the case 1 with a bolt 13, and
A cylindrical body has an internal gear 15 of the second planetary gear mechanism 6 fixed to the other end 14 which is a free end, and the reaction force of the planetary gear 16 of the second planetary gear mechanism 6 is transmitted through the internal gear 15. A torsion moment is transmitted to the other end 14 to act on the cylindrical body 11.
上記円筒体１１の一端部２１は第１，２図に示すように
薄肉に形成して、捩り歪（剪断歪）を大きくすると共に
、該一端部２１の外周にストレインゲージ２２を付着す
る。One end 21 of the cylindrical body 11 is formed thin as shown in FIGS. 1 and 2 to increase torsional strain (shear strain), and a strain gauge 22 is attached to the outer periphery of the one end 21.
該ストレインゲージ２２の出力信号は表示器２３に入力
する。また、上記円筒体１１の他端部２４は、第１，３
図に示すように厚肉に形成すると共に、該厚肉の他端部
２４に軸方向の長穴２５と２５を対向するように設けて
他端部２４の他端１４の捩りモーメントによる歪を上記
一端部２１の歪よりも大きくする。上記他端１４の変位
を検出するため、レバー２８をインターナルギヤー１５
の外周に固定する。一方、上記シャッターバルブ７は、
そのスプール３１の一端に設けたポペット部３２と弁座
３３との接離により、供給口３０から矢印Ｘに沿つてエ
アモータ２へ圧力空気を供給したり、その供給を停止し
たりするものである。またシャッターバルブ７はコイル
スプリング３４によりスプール３１を第１図中右方に付
勢して常開構造になつており、かつ圧力空気が供給され
ている際には、ポペット部３２の第１図中右端面に働ら
く空気圧力により、スプール３１を第１図中左方に付勢
するような構造になつている。また、上記スプール３１
の他端の軸部３５には、第１，４図に示すように小径部
３６を連設して、段部３７を形成する。一方、第１，４
図に示すように、ケース１に設けたブラケット４０には
係台部材４２の中央部を軸４１で揺動自在に取り付け、
該係合部材４２の一端部４２ａをコイルスプリング４３
で付勢して、他端部４２ｂを上記小径部３６に押し付け
るようにしている。上記係合部材４２の一端部４２ａに
螺着した調整ネジ４３は、上記円筒体１１の他端にイン
ターナルギヤー１５を介して固定したレバー２８で押圧
して、係合部材４２の他端部４２ｂを小径部３６から離
間させることができるようにしている。上記構成の自動
工具において、いま、供給口３０からシャッターバルブ
７を通してエアモータ２”に圧力空気を供給して、エア
モータ２を駆動し、そして、第１、第２遊星歯車機構５
，６を介して駆動軸３を増力・減速して回転させ、駆動
軸３の先端の工具取付部３ａに図示しない連結金具を介
して取付けたボルト（図示せす）を締付けているとする
。The output signal of the strain gauge 22 is input to a display 23. Further, the other end portion 24 of the cylindrical body 11 has the first and third ends.
As shown in the figure, it is formed thick, and the other end 24 of the thick wall is provided with long holes 25 and 25 in the axial direction so as to face each other to prevent strain caused by the torsional moment of the other end 14 of the other end 24. The strain is set to be larger than that of the one end portion 21. In order to detect the displacement of the other end 14, the lever 28 is connected to the internal gear 15.
be fixed to the outer periphery of the On the other hand, the shutter valve 7 is
Pressure air is supplied from the supply port 30 to the air motor 2 along the arrow X, or the supply is stopped, by contacting and separating a poppet portion 32 provided at one end of the spool 31 and a valve seat 33. . The shutter valve 7 has a normally open structure in which the spool 31 is biased to the right in FIG. The structure is such that the spool 31 is biased to the left in FIG. 1 by air pressure acting on the middle right end surface. In addition, the spool 31
As shown in FIGS. 1 and 4, the shaft portion 35 at the other end is provided with a small diameter portion 36 to form a stepped portion 37. On the other hand, the first and fourth
As shown in the figure, the central part of the anchoring member 42 is attached to the bracket 40 provided in the case 1 so as to be swingable around a shaft 41.
One end 42a of the engaging member 42 is connected to a coil spring 43.
, so as to press the other end portion 42b against the small diameter portion 36. The adjustment screw 43 screwed onto one end 42a of the engaging member 42 is pressed by a lever 28 fixed to the other end of the cylindrical body 11 via the internal gear 15, and the other end of the engaging member 42 is pressed. 42b can be separated from the small diameter portion 36. In the automatic tool configured as described above, pressurized air is now supplied from the supply port 30 through the shutter valve 7 to the air motor 2'' to drive the air motor 2, and the first and second planetary gear mechanisms 5
, 6 to rotate the drive shaft 3 by increasing and decelerating it, and tightening a bolt (shown) attached to the tool attachment portion 3a at the tip of the drive shaft 3 via a connecting fitting (not shown).
このとき、円筒体１１の他端のインターナルギヤー１５
が遊星歯車１６を介して駆動軸３の回転力の反力を受け
ているため、円筒体１１には捩りモーメントが作用し、
その薄肉の一端部２１には″捩りモーメントに精確に比
例する剪断歪が生じる。At this time, the internal gear 15 at the other end of the cylindrical body 11
receives the reaction force of the rotational force of the drive shaft 3 via the planetary gear 16, so a torsional moment acts on the cylindrical body 11,
At one end 21 of the thin wall, a shear strain occurs which is exactly proportional to the torsional moment.
この剪断歪に応じた電気信号をストレインゲージ２２は
表示装置２３に常時出力する。したがつて、常時、上記
捩りモーメントつまり駆動軸３の締付トルクは表示装置
２３に精度高く表示されるのである。一方、円筒体１１
の厚肉の他端部２４は、長穴２５により、第３，４図に
示すように一定間隔を有する一対の棒となるため、上記
捩りモーメントに対する他端部２４の歪は、比例関係を
有さないが、薄肉円筒体である一端部２１に比して大き
くなる。The strain gauge 22 constantly outputs an electric signal corresponding to this shear strain to the display device 23. Therefore, the torsional moment, that is, the tightening torque of the drive shaft 3, is always displayed on the display device 23 with high accuracy. On the other hand, the cylindrical body 11
The thick-walled other end 24 of the is formed into a pair of rods having a constant interval as shown in FIGS. However, it is larger than the one end portion 21 which is a thin cylindrical body.
勿論、他端部２４の肉厚は、必要強度を充たし、かつ上
記歪が大きくなる厚さに設定している。上記円筒体１１
に作用している締付トルクに応じて、レバー２８は円筒
体１１の軸心の回りに上記円筒体１１の他端部２４の大
きな歪により第５図中矢印Ｙ方向に大きく回転する。す
なわち、大きな機械的信号が得られる。そして、上記レ
バー２８の先端２８ａは、第５図に示すように、調整ネ
ジ４３を介して係合部材４２の一端部４２ａを押圧し、
その他端４２ｂをシャッターバルブ７の軸３５の小径部
３６から離間させる。上記締付トルクが一定値となると
、係合部材４２の他端４２ｂは、軸３５の段部３７から
離脱し、それとの係合を解除する。その瞬間、シャッタ
ーバルブ７のスプール３１は、ポペット部３２の第１図
中右端面に作用する空気圧力により、左方に移動して、
弁座３３にポペット部３２を密着させ、シャッターバル
ブ７を閉鎖する。これにより、エアモータ２へのエアの
供給が停止され、エアモータ２の駆動は停止する。そう
すると、円筒体１１に作用している捩りモーメントは、
第１、第２遊星歯車機構５，６およびエアモータ２の逆
方向の空回りにより零となり、レバー２８は調整ネジ４
３と離間し、係合部材４２の他端４２ｂはコイルスプリ
ング４３のバネカにより軸３５を軽く押圧する。次に、
図示しない操作弁により、供給口３０への圧力空気の供
給を停止すると、シャッターバルブ７のスプール３１は
コイルスプリング３４のバネカにより第１図に示すノー
マル位置に復帰し、係合部材４２は小径部３６を押圧し
、第１図に示す状態に復帰する。Of course, the thickness of the other end portion 24 is set to a thickness that satisfies the required strength and increases the above distortion. The cylindrical body 11
In response to the tightening torque acting on the lever 28, the lever 28 rotates significantly around the axis of the cylindrical body 11 in the direction of the arrow Y in FIG. 5 due to the large strain on the other end 24 of the cylindrical body 11. That is, a large mechanical signal can be obtained. Then, as shown in FIG. 5, the tip 28a of the lever 28 presses one end 42a of the engagement member 42 via the adjustment screw 43.
The other end 42b is separated from the small diameter portion 36 of the shaft 35 of the shutter valve 7. When the tightening torque reaches a constant value, the other end 42b of the engaging member 42 separates from the stepped portion 37 of the shaft 35 and releases its engagement therewith. At that moment, the spool 31 of the shutter valve 7 moves to the left due to air pressure acting on the right end surface of the poppet portion 32 in FIG.
The poppet portion 32 is brought into close contact with the valve seat 33, and the shutter valve 7 is closed. As a result, the supply of air to the air motor 2 is stopped, and the driving of the air motor 2 is stopped. Then, the torsional moment acting on the cylindrical body 11 is
The first and second planetary gear mechanisms 5, 6 and the air motor 2 idle in the opposite direction, and the lever 28 becomes zero due to the idle rotation of the first and second planetary gear mechanisms 5, 6 and the air motor 2.
3, and the other end 42b of the engaging member 42 lightly presses the shaft 35 by the spring force of the coil spring 43. next,
When the supply of pressurized air to the supply port 30 is stopped by an operation valve (not shown), the spool 31 of the shutter valve 7 returns to the normal position shown in FIG. Press 36 to return to the state shown in FIG.
上記実施例では、エアモータを用いたが電動機を用いて
も良い。In the above embodiment, an air motor is used, but an electric motor may also be used.
また、ストレインゲージからの出力信号は判別装置に入
力して、締付トルクを判別するようにしてもよい。以上
の説明で明らかな如く、この発明によれば、駆動軸に遊
嵌され、一端を固定端とし他端を上記駆動軸の回転力の
反力を受ける自由端とする円筒体の一端部を薄肉に形成
する一方、その他端部を厚肉に形成すると共に、該他端
部に軸方向の長穴を設け、上記一端部にストレインゲー
ジを付着したので、上記反力による一端部の締付トルク
に比例する歪量をストレインゲージで電気的に検出して
締付トルクを精度高く検出できる上に、上記反力による
他端の変位置を、上記長穴を有する他端部の大きな歪に
より大きな機械的信号として取り出すことができ、した
がつて、たとえばシャッターバルブ等を確実に作動させ
ることができる。Furthermore, the output signal from the strain gauge may be input to a discrimination device to discriminate the tightening torque. As is clear from the above description, according to the present invention, one end portion of a cylindrical body is loosely fitted onto a drive shaft and has one end as a fixed end and the other end as a free end that receives a reaction force of the rotational force of the drive shaft. While the wall is thin, the other end is formed thick, a long hole in the axial direction is provided in the other end, and a strain gauge is attached to the one end, so that the one end can be tightened by the reaction force. Not only can the tightening torque be detected with high precision by electrically detecting the amount of strain proportional to the torque using a strain gauge, but also the displacement of the other end due to the reaction force can be detected by the large strain at the other end having the elongated hole. It can be extracted as a large mechanical signal, and therefore, for example, a shutter valve or the like can be operated reliably.
第１図はこの発明の一実施例に係る自動工具の締付トル
クの検出装置の断面図、第２図は第１図の■−■線断面
図、第３図は第１図の■−■線断面図、第４図は円筒体
の斜視図、第５図はレバー近傍の斜視図てある。
２・・・・・・エアモータ、３・・・・・・駆動軸、４
・・・・・・伝達機構、１１・・・・・・円筒体、２２
・・・・・・ストレインゲージ、２５・・・・・・長穴
。FIG. 1 is a cross-sectional view of a tightening torque detection device for an automatic tool according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line ■-- 4 is a perspective view of the cylindrical body, and FIG. 5 is a perspective view of the vicinity of the lever. 2... Air motor, 3... Drive shaft, 4
...Transmission mechanism, 11... Cylindrical body, 22
...Strain gauge, 25...Elongated hole.
Claims (1)
自動工具の駆動軸に、一端を固定端とし他端を上記駆動
軸の回転力の反力を受ける自由端とする円筒体を遊嵌し
、該円筒体の一端部を薄肉に形成する一方、その他端部
を厚肉に形成すると共に、該他端部に軸方向の長穴を設
け、上記一端部にストレインゲージを付着して、上記反
力による一端部の歪量を電気的に検出して締付トルクを
検出する一方、上記反力による他端の変位量を機械的信
号として取り出すようにしたことを特徴とする自動工具
の締付トルクの検出装置。 ２ 上記伝達機構は遊星歯車機構により構成し、該遊星
歯車機構のインターナルギヤーを上記円筒体の他端に設
けて、上記駆動軸の回転力の反力を上記円筒体の他端に
伝えるようにしたことを特徴とする上記特許請求の範囲
第１項に記載の自動工具の締付トルクの検出装置。[Claims] 1. The drive shaft of an automatic tool that transmits the rotational force of a motor to the drive shaft via a transmission mechanism has one end as a fixed end and the other end as a free end that receives the reaction force of the rotational force of the drive shaft. A cylindrical body is fitted loosely into the cylindrical body, and one end of the cylindrical body is formed thin, while the other end is formed thick, and the other end is provided with an elongated hole in the axial direction, and a strain is formed in the one end. A gauge is attached to electrically detect the amount of strain at one end due to the reaction force to detect the tightening torque, while the amount of displacement at the other end due to the reaction force is extracted as a mechanical signal. Features: Automatic tool tightening torque detection device. 2. The transmission mechanism is constituted by a planetary gear mechanism, and an internal gear of the planetary gear mechanism is provided at the other end of the cylindrical body to transmit the reaction force of the rotational force of the drive shaft to the other end of the cylindrical body. An apparatus for detecting tightening torque of an automatic tool according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7726081A JPS6044115B2 (en) | 1981-05-20 | 1981-05-20 | Automatic tool tightening torque detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7726081A JPS6044115B2 (en) | 1981-05-20 | 1981-05-20 | Automatic tool tightening torque detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57194880A JPS57194880A (en) | 1982-11-30 |
| JPS6044115B2 true JPS6044115B2 (en) | 1985-10-01 |
Family
ID=13628875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7726081A Expired JPS6044115B2 (en) | 1981-05-20 | 1981-05-20 | Automatic tool tightening torque detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6044115B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6473403A (en) * | 1987-09-14 | 1989-03-17 | Tlv Co Ltd | Pressure reducing valve |
| JPH02148112A (en) * | 1988-11-29 | 1990-06-07 | Showa Aircraft Ind Co Ltd | Regulator |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61103783A (en) * | 1984-10-26 | 1986-05-22 | 芝浦メカトロニクス株式会社 | Bolt screwing machine |
| JPH042779Y2 (en) * | 1984-10-31 | 1992-01-30 | ||
| JP6125342B2 (en) * | 2013-06-17 | 2017-05-10 | 株式会社ユタニ | Fastening device |
-
1981
- 1981-05-20 JP JP7726081A patent/JPS6044115B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6473403A (en) * | 1987-09-14 | 1989-03-17 | Tlv Co Ltd | Pressure reducing valve |
| JPH02148112A (en) * | 1988-11-29 | 1990-06-07 | Showa Aircraft Ind Co Ltd | Regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57194880A (en) | 1982-11-30 |
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