JPS6346232Y2 - - Google Patents
Info
- Publication number
- JPS6346232Y2 JPS6346232Y2 JP1983052397U JP5239783U JPS6346232Y2 JP S6346232 Y2 JPS6346232 Y2 JP S6346232Y2 JP 1983052397 U JP1983052397 U JP 1983052397U JP 5239783 U JP5239783 U JP 5239783U JP S6346232 Y2 JPS6346232 Y2 JP S6346232Y2
- Authority
- JP
- Japan
- Prior art keywords
- nut runner
- offset
- torque
- socket tool
- output shaft
- 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 description 5
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
【考案の詳細な説明】
本考案はボルト或いはナツト等の締付け等に用
いられるナツトランナに関するものである。[Detailed Description of the Invention] The present invention relates to a nut runner used for tightening bolts, nuts, etc.
近年、機械や構造物の信頼性を向上させる目的
で、ねじ締の精度をあげる方法が種々開発されて
いるが、現在では、ボルト等の締付トルクの反力
を検出してトルク制御を行うナツトランナが一般
的に多用されている。第１図及び第２図はこの種
の従来のナツトランナを示したもので、第１図の
ナツトランナａは、ボルト等の隣接ピツチが広
く、ナツトランナ本体４の出力軸５とソケツト工
具６の回転軸とを偏心させる必要がない場合であ
つて、固定板１上に、孔２と同心状にトルク検出
器３が固設され、この検出器３の内芯にナツトラ
ンナ本体４の出力軸５を回転可能に貫通させると
共に、孔２を介して固定板１の下方に突出した出
力軸５の下端にソケツト工具６が直接固設されて
いる。したがつて、ソケツト工具６に嵌合せしめ
られたボルト７の頭部或いはナツトを、ナツトラ
ンナ本体４により出力軸５を介して締付けると、
その締付トルクの反力はトルク検出器３で検出さ
れる。また、第２図のナツトランナｂは、ボルト
等の隣接ピツチ間の距離が短く、出力軸とソケツ
ト工具の回転軸とをオフセツトさせて使用する必
要がある場合のもので、出力軸５の下端に装着し
た歯車８とソケツト工具６の回転軸９の上端の歯
車１０とを噛合させ、この両歯車８及び１０を固
定板１の下面に固設したオフセツトヘツド１１に
て覆うと共に、偏心させた上記ソケツト工具６の
回転軸９を上記オフセツトヘツド１１で回転自在
に支持し、そして、上記ソケツト工具６の回転軸
９の下端にボルト７の頭部或いはナツト等を嵌合
せしめるソケツト工具６が固定されている。上記
第２図のようにナツトランナとしてオフセツトが
必要な理由は、隣接するボルト間の距離がナツト
ランナの本体の外径よりも小さい場合である。即
ち、ねじ締は一般的に複数のねじを一回で締付け
る場合が多いので、ナツトランナを固定板１に複
数配列しようとすると隣接するボルト間の距離が
ナツトランナの本体の外径よりも小さい場合では
配列が不可能となるのであり、このような理由か
ら、ナツトランナ本体の出力軸５に対し、ソケツ
ト工具６の回転軸９を第２図の如くオフセツトさ
せておくと、固定板１にナツトランナを複数個配
列することができる。この様に、ナツトランナ本
体の出力軸５に対してソケツト工具６の回転軸９
をオフセツトさせる場合、両軸５，９間の回転力
伝達手段として一対の歯車１０，８を使用するの
が一般的であり、そのために、従来では、第２図
に示す様に、トルク検出器３の後にオフセツトヘ
ツド１１を取付け、このオフセツトヘツド１１内
で両軸５，９を一対の歯車１０，８で噛合連結さ
せていた。これは、オフセツト後に、トルク検出
器３を取付ける場合、トルク検出器３の構造が複
雑となり構成及び製作が困難となるためであつ
た。ところが、第２図に示したナツトンナｂによ
るトルク検出方法では、ボルト７の締付けトルク
は、一対のオフセツト歯車１０，８を介して、ト
ルク検出器３によつて検出される為、上記歯車１
０，８の伝達効率による伝達損失が締付トルクと
トルク検出器の誤差となる。したがつて、トルク
検出器３によつて検出されたトルク値に、上記の
伝達効率の損失分を更に加算すれば、実際のトル
ク値として検出することができることになる。し
かしながら、この伝達効率は常に一定とは限ら
ず、歯車１０，８の回転位置による圧力角の変化
や、加工精度や潤滑油の状態或いはベアリングの
状態、温度等に影響されて変動し、実験によれば
約７パーセントの変動が見受けられる。これが
為、上記ナツトランナｂでは、正確な締付けトル
ク値を検出することができなかつた。 In recent years, various methods have been developed to increase the precision of screw tightening in order to improve the reliability of machines and structures, but currently torque control is performed by detecting the reaction force of the tightening torque of bolts, etc. Nuttranna is commonly used. 1 and 2 show this type of conventional nut runner. Nut runner a in FIG. In the case where there is no need to make the nut runner eccentric, a torque detector 3 is fixed on the fixed plate 1 concentrically with the hole 2, and the output shaft 5 of the nut runner body 4 is rotated around the inner center of this detector 3. A socket tool 6 is directly fixed to the lower end of the output shaft 5 which extends downwardly through the hole 2 and protrudes downward from the fixing plate 1. Therefore, when the head or nut of the bolt 7 fitted into the socket tool 6 is tightened by the nut runner body 4 via the output shaft 5,
The reaction force of the tightening torque is detected by the torque detector 3. The nut runner b shown in Fig. 2 is used when the distance between adjacent pitches of bolts, etc. is short and the output shaft and the rotation axis of the socket tool must be offset. The installed gear 8 and the gear 10 at the upper end of the rotating shaft 9 of the socket tool 6 are meshed, and both gears 8 and 10 are covered with an offset head 11 fixed to the lower surface of the fixed plate 1, and are eccentrically set. The socket tool 6 rotatably supports the rotating shaft 9 of the socket tool 6 by the offset head 11, and fits the head of the bolt 7 or a nut into the lower end of the rotating shaft 9 of the socket tool 6. Fixed. The reason why the nut runner requires an offset as shown in FIG. 2 is when the distance between adjacent bolts is smaller than the outer diameter of the nut runner body. In other words, since screw tightening is generally done by tightening multiple screws at once, if you try to arrange multiple nut runners on the fixed plate 1, the distance between adjacent bolts may be smaller than the outer diameter of the nut runner body. For this reason, if the rotating shaft 9 of the socket tool 6 is offset from the output shaft 5 of the nut runner body as shown in FIG. Can be arrayed. In this way, the rotating shaft 9 of the socket tool 6 is connected to the output shaft 5 of the nut runner body.
When offset, it is common to use a pair of gears 10 and 8 as a means of transmitting rotational force between both shafts 5 and 9. For this purpose, conventionally, as shown in FIG. 2, a torque detector is used. An offset head 11 is attached after the shaft 3, and within this offset head 11 both shafts 5 and 9 are meshed and connected by a pair of gears 10 and 8. This is because, when the torque detector 3 is attached after offset, the structure of the torque detector 3 becomes complicated, making it difficult to configure and manufacture. However, in the torque detection method using the nut toner b shown in FIG. 2, the tightening torque of the bolt 7 is detected by the torque detector 3 via the pair of offset gears 10 and 8.
The transmission loss due to the transmission efficiency of 0.8 becomes the error between the tightening torque and the torque detector. Therefore, by further adding the above-mentioned transmission efficiency loss to the torque value detected by the torque detector 3, the torque value can be detected as an actual torque value. However, this transmission efficiency is not always constant, and fluctuates due to changes in the pressure angle depending on the rotational position of the gears 10 and 8, machining accuracy, lubricating oil condition, bearing condition, temperature, etc. According to the survey, there is a fluctuation of about 7%. For this reason, the nut runner b could not accurately detect the tightening torque value.
本考案は、ナツトランナ本体の出力軸とソケツ
ト工具の回転軸とをオフセツトさせて使用する必
要のある場合に於いて第２図に示した従来の上記
欠点に鑑み、これを改良したもので、トルク検出
器をオフセツト歯車よりもボルト側に配置しボル
トにかかる締付けトルクを損失なく直接正確に検
出することのできるナツトランナを提供せんとす
るものである。 The present invention is an improvement on the above-mentioned drawbacks of the conventional method shown in Fig. 2 when it is necessary to offset the output shaft of the nut runner body and the rotating shaft of the socket tool. It is an object of the present invention to provide a nut runner in which a detector is disposed closer to the bolt than the offset gear, and the tightening torque applied to the bolt can be directly and accurately detected without loss.
以下本考案の構成を図面に示す実施例にしたが
つて説明すると次の通りである。 The configuration of the present invention will be explained below based on the embodiment shown in the drawings.
第３図に於いて、２１は孔２２を有する固定
板、２３は偏心位置に挿通孔２４とこの挿通孔２
４を形成すべき薄肉円筒部２５とを有するトルク
検出器、これは、孔２２，２４を同心状にして固
定板２１上にボルト２６にて固定されている。２
７はトルク検出器２３の上記薄肉円筒部２５の外
周に貼着されたひずみゲージで、その電気的出力
は、トルク検出器２３内に設けられた前置増幅器
２８により増幅された後、コネクタ２９を通じて
外部に出力される。３０は上記検出器２３の上面
にボルト３１にて固定されたオフセツトヘツド
で、その下面の偏心位置に設けた膨隆部３０′は、
検出器２３の上面に挿通孔２４と同心状に設けた
凹陥部２３′に嵌合されている。３２は下端面に
出力軸３３を突設したナツトランナ本体で、これ
は上記オフセツトヘツド３０の上部に上板３４を
介して起立保持し、出力軸３３に取付けた歯車３
５はオフセツトヘツド３０内に位置させると共
に、軸端３３′はオフセツトヘツド３０の底部に
回転自在に軸支させる。３６はトルク検出器２３
の挿通孔２４に回転自在に内挿したソケツト工具
３９の回転軸で、これは、その上部に取付けた歯
車３７をオフセツトヘツド３０内に位置させて上
記歯車３５と噛合させ、且つ回転軸３６の上端３
６′はオフセツトヘツド３０の上部に回転自在に
軸支させると共に固定板２１の孔２２を介して下
方に突出させた下端には、ボルト３８の頭部或い
はナツト等を嵌合せしめるソケツト工具３９が固
設されている。 In FIG. 3, 21 is a fixing plate having a hole 22, and 23 is an insertion hole 24 located at an eccentric position.
A torque detector having a thin-walled cylindrical portion 25 to form a cylindrical portion 4 is fixed onto a fixing plate 21 with bolts 26 with holes 22 and 24 concentric. 2
A strain gauge 7 is attached to the outer periphery of the thin-walled cylindrical portion 25 of the torque detector 23, and its electrical output is amplified by a preamplifier 28 provided in the torque detector 23, and then transferred to the connector 29. Output to the outside through. 30 is an offset head fixed to the upper surface of the detector 23 with bolts 31, and a bulge 30' provided at an eccentric position on the lower surface of the offset head 30 is
It is fitted into a concave portion 23' provided on the upper surface of the detector 23 concentrically with the insertion hole 24. Numeral 32 is a nut runner main body having an output shaft 33 protruding from its lower end surface, which is held upright above the offset head 30 via an upper plate 34, and has a gear 3 attached to the output shaft 33.
5 is located within the offset head 30, and the shaft end 33' is rotatably supported at the bottom of the offset head 30. 36 is the torque detector 23
This is the rotating shaft of a socket tool 39 which is rotatably inserted into the insertion hole 24 of the socket tool. upper end 3
A socket tool 39 6' is rotatably supported on the upper part of the offset head 30 and protrudes downward through the hole 22 of the fixing plate 21, and the lower end thereof is fitted with the head of the bolt 38 or a nut. is permanently installed.
上記ナツトランナは、モータに減速機が直結さ
れており、この減速器から出力軸３３が出てお
り、このナツトランナの出力軸３３に対してソケ
ツト工具３９の回転軸３６をオフセツトさせるた
めにオフセツトヘツド３０が使用されており、こ
れは、隣接するボルト間の距離がナツトランナ本
体３２の外径よりも小さい場合、ナツトランナ本
体３２の中心線に対してソケツト工具３０の中心
線を一方にオフセツトさせもので、特開昭50−
91099号公報のように、ナツトランナ本体の中心
線とソケツト工具中心線とを同一軸線上に配置し
たものとは全く別異であり、かつ、上記公報中の
減速歯車群は、モータの回転数を減速させるため
のもので、工具は依然として本体の中心線上に配
置されており、本考案とは全く別異のもので、こ
れでは第１図に示した従来例と同一であり、隣接
するボルト間の距離がナツトランナ本体の外径よ
り小さい場合の対策が全くなされていない。 In the nut runner, a speed reducer is directly connected to the motor, and an output shaft 33 comes out from the speed reducer, and an offset head is provided to offset the rotating shaft 36 of the socket tool 39 with respect to the output shaft 33 of the nut runner. 30 is used, which allows the centerline of the socket tool 30 to be offset to one side with respect to the centerline of the nutrunner body 32 if the distance between adjacent bolts is less than the outside diameter of the nutrunner body 32. , Japanese Patent Application Publication 1973-
This is completely different from the case in which the center line of the nut runner body and the center line of the socket tool are arranged on the same axis as in Publication No. 91099, and the reduction gear group in the above publication is designed to reduce the rotational speed of the motor. The tool is still placed on the center line of the main body, which is completely different from the present invention, which is the same as the conventional example shown in Fig. No countermeasures have been taken in the case where the distance is smaller than the outer diameter of the nut runner body.
而して、ナツトランナ本体３２により出力軸３
３を回転させると、その回転力は、歯車３５，３
７を介して回転軸３６に伝達され、ソケツト工具
３０に嵌合せしめられたボルト３８のの頭部或い
はナツト等が締付けられる。すると、その締付け
トルクの反力は、回転軸３６が挿通された固定板
２１を通して、この固定板２１上に直接固設され
たトルク検出器２３によつて直接検出される。 Therefore, the output shaft 3 is
When gear 3 is rotated, the rotational force is generated by gears 35 and 3.
7 to the rotating shaft 36, and the head or nut of the bolt 38 fitted into the socket tool 30 is tightened. Then, the reaction force of the tightening torque is directly detected by the torque detector 23 directly fixed on the fixed plate 21 through which the rotating shaft 36 is inserted.
以上説明したように、本考案はトルク検出器を
オフセツト歯車よりもボルト側に、即ちボルトに
かかる締付けトルクを直接に損失なく検出する位
置に配置した構造としたから、オフセツト歯車は
減速機の一部と同様でありその締付トルク精度も
ストレート型ナツトランナと同等の２パーセント
程度になることを確認した。 As explained above, the present invention has a structure in which the torque detector is placed closer to the bolt than the offset gear, that is, in a position where the tightening torque applied to the bolt can be directly detected without loss. It was confirmed that the tightening torque accuracy was about 2%, which is the same as that of a straight nut runner.
即ち、従来方式によりボルトにかかる締付けト
ルクをオフセツト歯車を介して検出したものが、
その歯車の伝達効率の影響によりトルク検出精度
が低下し、その結果ナツトランナの締付精度が７
パーセント程度であつたものに比し大幅に改善す
るものである。 In other words, the conventional method of detecting the tightening torque applied to a bolt via an offset gear is
The torque detection accuracy decreases due to the influence of the transmission efficiency of the gear, and as a result, the nut runner's tightening accuracy decreases by 7.
This is a significant improvement over the previous version, which was only about 1%.
第１図はナツトランナの従来例を示した断面
図、第２図はナツトランナのほかの従来例を示し
た断面図、第３図は本考案に係るナツトランナの
断面説明図である。
１……固定板、２３……トルク検出器、３０…
…オフセツトヘツド、３２……ナツトランナ本
体、３３……出力軸、３６……回転軸、３９……
ソケツト工具。
FIG. 1 is a sectional view showing a conventional example of a nut runner, FIG. 2 is a sectional view showing another conventional example of a nut runner, and FIG. 3 is an explanatory sectional view of a nut runner according to the present invention. 1... Fixed plate, 23... Torque detector, 30...
...Offset head, 32... Nut runner body, 33... Output shaft, 36... Rotating shaft, 39...
socket tool.
Claims (1)
との間に設置し、かつ、ナツトランナ本体の出力
軸と、ソケツト工具の回転軸を、ナツトランナ本
体の外部でオフセツトさせて配置する形式のナツ
トランナにいて、 ナツトランナ本体の出力軸と、ソケツト工具の
回転軸とをオフセツトさせて配置してなるオフセ
ツトヘツドを、ナツトランナ本体に直接固定し、
かつ、トルク検出器を、上記オフセツトヘツドを
介してナツトランナ本体と、固定板との間に設置
したことを特徴とするナツトランナ。[Scope of Claim for Utility Model Registration] A torque detector is installed between the nut runner body and the fixed plate, and the output shaft of the nut runner body and the rotation axis of the socket tool are offset outside the nut runner body. In the case of a nut runner of the type in which the nut runner is placed, an offset head, which is made up of an offset between the output shaft of the nut runner body and the rotation axis of the socket tool, is fixed directly to the nut runner body,
A nut runner further characterized in that a torque detector is installed between the nut runner main body and the fixed plate via the offset head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5239783U JPS58177279U (en) | 1983-04-07 | 1983-04-07 | Natsutranna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5239783U JPS58177279U (en) | 1983-04-07 | 1983-04-07 | Natsutranna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58177279U JPS58177279U (en) | 1983-11-26 |
| JPS6346232Y2 true JPS6346232Y2 (en) | 1988-12-01 |
Family
ID=30063108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5239783U Granted JPS58177279U (en) | 1983-04-07 | 1983-04-07 | Natsutranna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58177279U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015036180A (en) * | 2013-08-16 | 2015-02-23 | ファナック株式会社 | Screw tightening device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514717A (en) * | 1974-06-28 | 1976-01-16 | Nissan Motor | |
| JPS526919A (en) * | 1975-07-07 | 1977-01-19 | Hitachi Ltd | Brushless motor |
-
1983
- 1983-04-07 JP JP5239783U patent/JPS58177279U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514717A (en) * | 1974-06-28 | 1976-01-16 | Nissan Motor | |
| JPS526919A (en) * | 1975-07-07 | 1977-01-19 | Hitachi Ltd | Brushless motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015036180A (en) * | 2013-08-16 | 2015-02-23 | ファナック株式会社 | Screw tightening device |
| DE102014111567B4 (en) * | 2013-08-16 | 2016-12-01 | Fanuc Corporation | robot system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58177279U (en) | 1983-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102239031B (en) | Disc-shaped torque transducer | |
| US5738183A (en) | Motor operated power steering device | |
| US8770061B2 (en) | Crank assembly for a bicycle bottom bracket assembly, shaft and crank arm thereof | |
| US8302702B2 (en) | Torque sensing unit for a power tool and a power tool comprising such a torque sensing unit | |
| EP2539677A1 (en) | Force-measurement sleeve and measurement and calculation method | |
| JPS6346232Y2 (en) | ||
| JPH0726882B2 (en) | Torque measuring device | |
| JP3639421B2 (en) | Preload measurement method for double row rolling bearings | |
| KR20050074510A (en) | Electrical pressing device | |
| US6246851B1 (en) | Photoreceptor drum | |
| JP4010566B2 (en) | Rotary shaft with built-in torsional moment measurement device | |
| JPH0643047A (en) | Mechanical joint | |
| JPS6226698B2 (en) | ||
| JP3453654B2 (en) | Torque converter | |
| JPH05203515A (en) | Examining apparatus for torque value and method of determining torque value | |
| WO2019232675A1 (en) | Screw bolt assembly for measuring preload and bearing preload measurement apparatus | |
| JPS6123808Y2 (en) | ||
| JPH0626827Y2 (en) | Attachment for brake dynamometer | |
| JP2003149061A (en) | Measuring apparatus for torque and direction of direction in driving structure | |
| JPH0432041U (en) | ||
| JP3021537B2 (en) | Method of manufacturing a shaft assembly by assembling two shafts | |
| SU1236177A1 (en) | Device for measuring axial forces of rotating shafts | |
| JPS6342195Y2 (en) | ||
| JPS6146404Y2 (en) | ||
| JP2568147Y2 (en) | Wheel contact detection mechanism |