JPH0818799B2 - No load high speed operation electric hoist - Google Patents
No load high speed operation electric hoistInfo
- Publication number
- JPH0818799B2 JPH0818799B2 JP35133291A JP35133291A JPH0818799B2 JP H0818799 B2 JPH0818799 B2 JP H0818799B2 JP 35133291 A JP35133291 A JP 35133291A JP 35133291 A JP35133291 A JP 35133291A JP H0818799 B2 JPH0818799 B2 JP H0818799B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary shaft
- speed operation
- fixed
- movable rotary
- frame
- 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 - Fee Related
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、無負荷時に電動巻上機
の電動機を自動的に高速運転させ、負荷時に前記電動機
を自動的に低速運転に切換えるようにした無負荷高速運
転電動巻上機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hoist with no load and high speed operation, in which the electric motor of an electric hoist is automatically operated at high speed under no load, and the electric motor is automatically switched to low speed operation under load. It is about machines.
【０００２】[0002]
【従来の技術】従来、無負荷時に電動巻上機の電動機を
自動的に高速運転させ、負荷時に前記電動機を自動的に
低速運転に切換えるようにした無負荷高速運転電動巻上
機としては、図７ないし図１０に示されているように、
電動機のロータにより回転される駆動軸１とロードシー
ブ２との間に歯車減速機構を介在させた電動巻上機にお
いて、駆動軸１以外の可動回転軸３を、電動巻上機のフ
レーム４により回転および摺動自在に支承し、前記可動
回転軸３に駆動ヘリカル歯車７を固定し、その可動回転
軸３と平行に配置されてフレーム４により回転自在にか
つ摺動不能に支承されている定位置回転軸８に、前記駆
動ヘリカル歯車７に噛み合う従動ヘリカル歯車９を固定
し、負荷時に可動回転軸３により操作される低速運転切
換制御用リミットスイッチＬＳを前記フレーム４に固定
し、前記可動回転軸３に、これを低速運転切換制御用リ
ミットスイッチＬＳから離反させるように働くばね１０
を係合させた構造のものが提案されている（特願平３−
１１６５５０号参照）。なお図７ないし図１０におい
て、可動回転軸３に駆動軸１の駆動歯車１１に噛み合う
従動歯車１２が固定され、定位置回転軸８に固定された
駆動歯車１３に、従動軸１４に固定された従動歯車１５
が噛み合わされ、その従動軸１４にロードシーブ２が固
定されている。2. Description of the Related Art Conventionally, a no-load high-speed operation electric hoist which automatically operates a motor of an electric hoist under no load at high speed and automatically switches the electric motor to low speed operation under load, As shown in FIGS. 7-10,
In an electric hoist in which a gear reduction mechanism is interposed between a drive shaft 1 and a load sheave 2 rotated by a rotor of an electric motor, a movable rotary shaft 3 other than the drive shaft 1 is replaced by a frame 4 of the electric hoist. It is rotatably and slidably supported, the drive helical gear 7 is fixed to the movable rotary shaft 3, and is arranged parallel to the movable rotary shaft 3 and rotatably and non-slidably supported by the frame 4. A driven helical gear 9 that meshes with the drive helical gear 7 is fixed to the position rotary shaft 8, and a low speed operation changeover control limit switch LS operated by the movable rotary shaft 3 under load is fixed to the frame 4 to enable the movable rotation. A spring 10 acting on the shaft 3 so as to separate the shaft 3 from the limit switch LS for low speed operation switching control.
There has been proposed a structure in which the above are engaged (Japanese Patent Application No. 3-
116550). 7 to 10, the driven gear 12 meshing with the drive gear 11 of the drive shaft 1 is fixed to the movable rotary shaft 3, and the driven gear 13 fixed to the fixed position rotary shaft 8 is fixed to the driven shaft 14. Driven gear 15
Are engaged with each other, and the load sheave 2 is fixed to the driven shaft 14.
【０００３】[0003]
【発明が解決しようとする課題】前記従来の無負荷高速
運転電動巻上機の場合は、フレーム４を構成する外側フ
レーム６に、可動回転軸３を突出させる孔１６を穿設す
る必要があり、かつフレーム４内の潤滑油が前記可動回
転軸３と孔１６との間から漏出するのを防止するため
に、オイルシールを設ける必要があり、そのため無負荷
高速運転電動巻上機の製作コストが高くなるという問題
がある。In the case of the conventional no-load high-speed operation electric hoisting machine described above, it is necessary to form a hole 16 through which the movable rotary shaft 3 projects in the outer frame 6 which constitutes the frame 4. Moreover, in order to prevent the lubricating oil in the frame 4 from leaking from between the movable rotary shaft 3 and the hole 16, it is necessary to provide an oil seal, and therefore, the manufacturing cost of the no-load high-speed operation electric hoisting machine. There is a problem that is high.
【０００４】[0004]
【課題を解決するための手段】前述の問題を有利に解決
するために、本発明の無負荷高速運転電動巻上機におい
ては、電動機のロータにより回転される駆動軸１とロー
ドシーブ２との間に歯車減速機構を介在させた電動巻上
機において、駆動軸１以外の可動回転軸３を電動巻上機
のフレーム４により回転および摺動自在に支承し、その
可動回転軸３の端部およびその端部に固定された磁石５
を、前記フレーム４を構成する非磁性材料製外側フレー
ム６により被覆し、前記可動回転軸３に駆動ヘリカル歯
車７を固定し、その可動回転軸３と平行に配置されてフ
レーム４により回転自在にかつ摺動不能に支承されてい
る定位置回転軸８に、前記駆動ヘリカル歯車７に噛み合
う従動ヘリカル歯車９を固定し、負荷時に可動回転軸３
の磁石５により操作される低速運転切換制御用磁気セン
サーＭＳを、前記外側フレーム６の外部に固定し、前記
可動回転軸３に、これを低速運転切換制御用磁気センサ
ーＭＳから離反または接近する方向に移動させるように
働くばね１０を係合させる。In order to advantageously solve the above-mentioned problems, in the no-load high-speed electric hoisting machine of the present invention, the drive shaft 1 and the load sheave 2 rotated by the rotor of the electric motor are provided. In an electric hoist having a gear reduction mechanism interposed therebetween, a movable rotary shaft 3 other than the drive shaft 1 is rotatably and slidably supported by a frame 4 of the electric hoist, and an end portion of the movable rotary shaft 3 is supported. And a magnet 5 fixed to its end
Is covered with an outer frame 6 made of a non-magnetic material that constitutes the frame 4, the drive helical gear 7 is fixed to the movable rotary shaft 3, and the movable helical shaft 7 is arranged in parallel with the movable rotary shaft 3 and is rotatable by the frame 4. Further, a driven helical gear 9 meshing with the driving helical gear 7 is fixed to a fixed position rotating shaft 8 that is non-slidingly supported, and the movable rotating shaft 3 is movable when loaded.
The magnetic sensor MS for low speed operation switching control operated by the magnet 5 is fixed to the outside of the outer frame 6, and is moved toward or away from the movable rotary shaft 3 from the magnetic sensor MS for low speed operation switching control. Engage a spring 10 that acts to move the.
【０００５】[0005]
【実施例】図１ないし図５は本発明の第１実施例を示す
ものであって、電動巻上機１７における電動機のロータ
により回転される駆動軸１が、電動巻上機１７のフレー
ム４により軸受１８を介して支承され、その駆動軸１に
平行に配置された可動回転軸３は、フレーム４に設けら
れた軸受１９により回転および摺動自在に支承され、前
記可動回転軸３の中間部に、駆動ヘリカル歯車７が一体
に設けられると共に、駆動軸１に設けられた駆動歯車１
１に噛み合う従動歯車１２が圧入により一体に固定さ
れ、前記可動回転軸３の一端部の端面に磁石５が固定さ
れ、前記可動回転軸３の一端部の端面および磁石５は、
フレーム４を構成する非磁石性材料製外側フレーム６に
より被覆されている。1 to 5 show a first embodiment of the present invention, in which a drive shaft 1 rotated by a rotor of an electric motor of an electric hoisting machine 17 is a frame 4 of the electric hoisting machine 17. The movable rotary shaft 3 supported by a bearing 18 provided on the frame 4 is rotatably and slidably supported by a bearing 19 provided on the frame 4. A drive helical gear 7 is integrally provided on the drive shaft 1 and a drive gear 1 provided on the drive shaft 1.
The driven gear 12 meshing with 1 is fixed integrally by press fitting, the magnet 5 is fixed to the end face of the one end of the movable rotary shaft 3, and the end face of the one end of the movable rotary shaft 3 and the magnet 5 are
The frame 4 is covered with an outer frame 6 made of a non-magnetic material.
【０００６】前記駆動ヘリカル歯車７と内側フレーム２
０の内面との間にスラスト軸受２１が設けられ、前記従
動歯車１２と前記外側フレーム６の内面との間にスラス
ト軸受２２が設けられ、そのスラスト軸受２２と可動回
転軸３の中間段部との間に、その可動回転軸３を外側フ
レーム６から離反させる方向に押圧するばね１０が介在
され、また駆動ヘリカル歯車７の端部側に設けられた環
状凹部の底部とスラスト軸受２１との間に、そのスラス
ト軸受２１を押えるための押えばね２３が介在され、こ
の押えばね２３の反発力は前記ばね１０の反発力よりも
弱く設定されている。The drive helical gear 7 and the inner frame 2
A thrust bearing 21 is provided between the driven gear 12 and the inner surface of the outer frame 6, and a thrust bearing 22 is provided between the driven gear 12 and the inner surface of the outer frame 6. Is interposed between the thrust bearing 21 and the bottom of the annular recess provided on the end side of the drive helical gear 7. Further, a pressing spring 23 for pressing the thrust bearing 21 is interposed, and the repulsive force of the pressing spring 23 is set to be weaker than the repulsive force of the spring 10.
【０００７】可動回転軸３に平行な定位置回転軸８は、
外側フレーム６および内側フレーム２０により軸受２４
を介して回転自在にかつ摺動不能に支承され、前記定位
置回転軸８に、前記駆動ヘリカル歯車７に噛み合う従動
ヘリカル歯車９と駆動歯車１３とが固定され、前記定位
置回転軸８に平行に配置されてフレーム４にり軸受２５
を介して回転自在に支承されている従動軸１４に、前記
定位置回転軸８の駆動歯車１３に噛み合う従動歯車１５
が固定されると共に、ロードチェーン２６を巻掛けたロ
ードシーブ２が固定され、さらに従動軸１４の中間部と
内側フレーム２０の従動軸挿通孔との間にシールリング
２７が嵌設されている。The fixed position rotary shaft 8 parallel to the movable rotary shaft 3 is
Bearing 24 by outer frame 6 and inner frame 20
Is rotatably and non-slidably supported via a fixed gear, and a driven helical gear 9 and a drive gear 13 that mesh with the drive helical gear 7 are fixed to the fixed position rotary shaft 8 and are parallel to the fixed position rotary shaft 8. Located on the frame 4
A driven gear 15 that is rotatably supported via a driven gear 15 that meshes with a drive gear 13 of the fixed position rotating shaft 8.
Is fixed, the load sheave 2 around which the load chain 26 is wound is fixed, and a seal ring 27 is fitted between the intermediate portion of the driven shaft 14 and the driven shaft insertion hole of the inner frame 20.
【０００８】前記磁石５により操作される低速運転切換
制御用磁気センサーＭＳは、前記外側フレーム６の外側
において磁石５に対向するように配置されると共に、外
側フレーム６にビス２８により固定されている保持金具
２９に挿通され、前記磁気センサーＭＳの雄ねじ部に螺
合された一対の挟持固定用ナット３０，３１により、前
記磁気センサーＭＳが保持金具２９に固定されている。The low speed operation switching control magnetic sensor MS operated by the magnet 5 is arranged outside the outer frame 6 so as to face the magnet 5, and is fixed to the outer frame 6 by screws 28. The magnetic sensor MS is fixed to the holding metal fitting 29 by a pair of holding and fixing nuts 30 and 31 which are inserted into the holding metal fitting 29 and screwed into the male screw portion of the magnetic sensor MS.
【０００９】図５は低速運転切換制御用磁気センサーＭ
Ｓを使用した無負荷高速運転および負荷低速運転制御回
路を示すものであって、電源線Ｓ，Ｔに電圧降下用トラ
ンスＴｒを介して接続された操作電源に、直列に接続さ
れた巻上用押ボタンスイッチＰＢ−Ｕおよび巻上用リレ
ーＭＣ１からなる巻上回路と、直列に接続された巻下用
押ボタンスイッチＰＢ−Ｄおよび巻下用リレーＭＣ２か
らなる巻下回路と、直列に接続された巻下用リレーＭＣ
２のＡ接点ＭＣ２−ａ，磁気センサーＭＳのＡ接点ＭＳ
−ａ，高速用リレーＭＣ３のＢ接点ＭＣ３−ｂおよび低
速用リレーＭＣ４からなる低速回路と、直列に接続され
た巻上用リレーＭＣ１のＡ接点ＭＣ１−ａ，磁気センサ
ーＭＳのＢ接点ＭＳ−ｂ，低速用リレーＭＣ４のＢ接点
ＭＣ４−ｂおよび高速用リレーＭＣ３からなる高速回路
とが接続され、かつ低速用リレーＭＣ４の自己保持用Ａ
接点ＭＣ４−ａ1 の一端部は、低速回路におけるＡ接点
ＭＣ２−ａおよびＡ接点ＭＳ−ａの間と、高速回路にお
けるＡ接点ＭＣ１−ａおよびＢ接点ＭＳ−ｂの間とに接
続され、前記Ａ接点ＭＣ４−ａ1 の他端部は、低速回路
におけるＡ接点ＭＳ−ａおよびＢ接点ＭＣ３−ｂの間に
接続されている。また、２極と４極のポールチェンジモ
ータからなる電動巻上機１７の電動機Ｍは、高速用リレ
ーＭＣ３のＡ接点ＭＣ３−ａおよび低速用リレーＭＣ４
のＡ接点ＭＣ４−ａと、巻上用リレーＭＣ１のＡ接点Ｍ
Ｃ１−ａおよび巻下用リレーＭＣ２のＡ接点ＭＣ２−ａ
を介して、電源線Ｒ，Ｓ，Ｔに接続されている。FIG. 5 shows a magnetic sensor M for controlling low speed operation switching.
Fig. 2 shows a no-load high-speed operation and low-speed operation control circuit using S, for hoisting connected in series to an operating power supply connected to power supply lines S and T via a voltage drop transformer Tr. A hoisting circuit composed of the push button switch PB-U and the hoisting relay MC1 and a hoisting circuit composed of the hoisting push button switch PB-D and the hoisting relay MC2 connected in series were connected in series. Unwinding relay MC
2 A contact MC2-a, A contact MS of magnetic sensor MS
-A, a low speed circuit consisting of B contact MC3-b of high speed relay MC3 and low speed relay MC4, A contact MC1-a of hoisting relay MC1 connected in series, B contact MS-b of magnetic sensor MS , A B-contact MC4-b of the low-speed relay MC4 and a high-speed circuit composed of the high-speed relay MC3 are connected, and the low-speed relay MC4 is self-holding A.
One end of the contact MC4-a 1 is connected between the A contact MC2-a and the A contact MS-a in the low speed circuit and between the A contact MC1-a and the B contact MS-b in the high speed circuit, and The other end of the A contact MC4-a 1 is connected between the A contact MS-a and the B contact MC3-b in the low speed circuit. Further, the electric motor M of the electric hoisting machine 17 including the 2-pole and 4-pole pole change motors includes the A contact MC3-a of the high speed relay MC3 and the low speed relay MC4.
A contact MC4-a of A and the A contact M of hoisting relay MC1
A contact MC2-a of C1-a and the winding relay MC2
Is connected to the power supply lines R, S, and T via.
【００１０】図５に示す制御回路において、無負荷時に
巻上用押ボタンスイッチＰＢ−Ｕを押すと、巻上用リレ
ーＭＣ１が励磁されて、そのＡ接点ＭＣ１−ａがオンに
なるので、高速用リレーＭＣ３が励磁されて、そのＢ接
点ＭＣ３−ｂがオフになると共に、Ａ接点ＭＣ３−ａが
オンになり、そのため電動機Ｍは高速で巻上運転され
る。電動機Ｍの巻上運転中に負荷が作用すると、定位置
回転軸８に固定された従動ヘリカル歯車９に噛み合う駆
動ヘリカル歯車７の歯の傾斜に基づく可動回転軸長手方
向の分力により、可動回転軸３がばね１０を圧縮しなが
ら前記磁気センサーＭＳに向かって移動し、可動回転軸
３の端面に固定された磁石５により、前記磁気センサー
ＭＳが切換えられて、Ａ接点ＭＳ−ａがオンになると共
にＢ接点ＭＳ−ｂがオフになる。In the control circuit shown in FIG. 5, when the hoisting push button switch PB-U is pressed when there is no load, the hoisting relay MC1 is excited and its A contact MC1-a is turned on. The relay MC3 is excited to turn off its B contact MC3-b and turn on its A contact MC3-a, so that the electric motor M is hoisted at high speed. When a load is applied during the hoisting operation of the electric motor M, a movable force is generated by a component force in the longitudinal direction of the movable rotary shaft based on the inclination of the teeth of the drive helical gear 7 that meshes with the driven helical gear 9 fixed to the fixed position rotary shaft 8. The shaft 3 moves toward the magnetic sensor MS while compressing the spring 10, and the magnetic sensor MS is switched by the magnet 5 fixed to the end face of the movable rotary shaft 3, and the A contact MS-a is turned on. At the same time, the B contact MS-b is turned off.
【００１１】このため低速用リレーＭＣ４が励磁され
て、そのＡ接点ＭＣ４−ａおよび自己保持用Ａ接点ＭＣ
４−ａ1 がオンになり、かつＢ接点ＭＣ４−ｂがオフに
なって高速用リレーＭＣ３が解磁されるので、電動巻上
機９は自動的に低速運転に切換えられる。巻下運転の場
合は、巻下用押ボタンスイッチＰＢ−Ｄを押すと、巻上
運転の場合と同様に、無複高速運転から負荷低速運転に
自動的に切換えられる。Therefore, the low speed relay MC4 is excited, and its A contact MC4-a and self-holding A contact MC
4-a 1 is turned on, and since B contact MC4-b is a high speed relay MC3 collapsed magnetic turned off, the electric hoist 9 is switched automatically to the low-speed operation. In the case of the hoisting operation, when the hoisting push-button switch PB-D is pressed, as in the case of the hoisting operation, the non-multiple speed operation is automatically switched to the load low speed operation.
【００１２】本発明を実施する場合、図２に示すよう
に、駆動歯車１１およびこれに噛み合う従動歯車１２を
ヘリカル歯車にし、それらのヘリカル歯車の噛み合い分
力により、可動回転軸３の軸方向移動を補助するように
構成してもよい。In carrying out the present invention, as shown in FIG. 2, the drive gear 11 and the driven gear 12 meshing with the drive gear 11 are helical gears, and the meshing component force of these helical gears causes the movable rotary shaft 3 to move in the axial direction. May be configured to assist.
【００１３】実験の結果によると、駆動軸を可動回転軸
とした場合は、その可動回転軸を支持する軸受に負荷さ
れる荷重が小さいため、電動機の起動トルク発生の瞬間
に低速運転切換制御用磁気センサーＭＳが動作してバタ
ツキ現象が生じるので不適当である。前記磁気センサー
ＭＳの動作を安定化するためには、可動回転軸を、駆動
軸以外でその駆動軸から大きく離れている軸にする程有
効であるが、可動回転軸が駆動軸から離れる量が大きく
なるに伴って、軸荷重が増大して部品が大型化するの
で、実用的には、可動回転軸３を、前記実施例に示すよ
うに第２軸にするか、または第３軸にするのが好まし
い。According to the result of the experiment, when the drive shaft is a movable rotary shaft, the load applied to the bearing supporting the movable rotary shaft is small, so that the low speed operation switching control is performed at the moment when the starting torque of the electric motor is generated. This is not suitable because the magnetic sensor MS operates to cause a flapping phenomenon. In order to stabilize the operation of the magnetic sensor MS, it is effective to set the movable rotary shaft to a shaft other than the drive shaft and far away from the drive shaft, but it is effective that the movable rotary shaft separates from the drive shaft. As the load increases, the axial load increases and the size of the component increases. Therefore, in practice, the movable rotary shaft 3 is the second shaft or the third shaft as shown in the above embodiment. Is preferred.
【００１４】図６は本発明の第２実施例を示すものであ
って、内側フレーム２０の内面に係合したスラスト軸受
２１と、駆動ヘリカル歯車７に設けられた環状凹部の底
部との間に、可動回転軸３を低速運転切換制御用磁気セ
ンサーＭＳに接近させる方向に移動させるように働くば
ね１０が介在され、外側フレーム６の内面に係合された
スラスト軸受２２と、前記可動回転軸３の中間段部との
間に、スラスト軸受２２を押さえるための押えばね２３
が介在され、この押えばね２３の反発力は前記ばね１０
の反発力よりも弱く設定されている。また駆動ヘリカル
歯車７の歯および従動ヘリカル歯車９の歯の傾斜方向
は、巻上運転中に負荷が作用したとき、前記各歯の傾斜
に基づく可動回転軸長手方向の分力により、可動回転軸
３がばね１０を圧縮しながら前記磁気センサーＭＳから
離反移動させるように構成されているが、その他の構成
は第１実施例の場合と同様である。FIG. 6 shows a second embodiment of the present invention, in which a thrust bearing 21 engaged with the inner surface of the inner frame 20 and the bottom of an annular recess provided in the drive helical gear 7 are provided. , A thrust bearing 22 engaged with the inner surface of the outer frame 6 via a spring 10 that acts to move the movable rotary shaft 3 in the direction of approaching the low speed operation switching control magnetic sensor MS, and the movable rotary shaft 3 The pressing spring 23 for pressing the thrust bearing 22 with the intermediate step portion of the
And the repulsive force of the pressing spring 23 is
It is set weaker than the repulsive force of. Further, the inclination directions of the teeth of the driving helical gear 7 and the teeth of the driven helical gear 9 are such that, when a load is applied during the hoisting operation, a component force in the longitudinal direction of the movable rotation shaft is generated based on the inclination of each tooth. 3 is configured so as to move away from the magnetic sensor MS while compressing the spring 10, but the other configurations are the same as in the case of the first embodiment.
【００１５】[0015]
【発明の効果】本発明によれば、電動巻上機における駆
動軸１以外の可動回転軸３を、電動巻上機のフレーム４
により回転および摺動自在に支承し、その可動回転軸３
の端部およびその端部に固定された磁石５を、前記フレ
ーム４を構成する非磁性材料製外側フレーム６により被
覆し、前記可動回転軸３に駆動ヘリカル歯車７を固定
し、その可動回転軸３と平行に配置されてフレーム４に
より回転自在にかつ摺動不能に支承されている定位置回
転軸８に、前記駆動ヘリカル歯車７に噛み合う従動ヘリ
カル歯車９を固定し、負荷時に可動回転軸３の磁石５に
より操作される低速運転切換制御用磁気センサーＭＳ
を、前記外側フレーム６の外部に固定し、前記可動回転
軸３に、これを低速運転切換制御用磁気センサーＭＳか
ら離反または接近する方向に移動させるように働くばね
１０を係合させたので、フレームを構成する外側フレー
ム６に、可動回転軸３を挿通する孔を穿設することな
く、無負荷高速運転電動巻上機を、無負荷時に自動的に
高速運転すると共に、負荷時に自動的に低速運転するこ
とができ、そのため無負荷高速運転電動巻上機の加工工
数を少なくすると共に構造を簡単にして、無負荷高速運
転電動巻上機を低コストで製作できる。According to the present invention, the movable rotary shaft 3 other than the drive shaft 1 in the electric hoist is connected to the frame 4 of the electric hoist.
Is rotatably and slidably supported by the movable rotary shaft 3
End of the magnet and the magnet 5 fixed to the end are covered with an outer frame 6 made of a non-magnetic material that constitutes the frame 4, and a drive helical gear 7 is fixed to the movable rotary shaft 3, and the movable rotary shaft 3, a driven helical gear 9 meshing with the driving helical gear 7 is fixed to a fixed position rotating shaft 8 rotatably and non-slidingly supported by a frame 4, and the movable rotating shaft 3 under load. Magnetic sensor MS for low speed operation switching control operated by the magnet 5 of
Is fixed to the outside of the outer frame 6, and the movable rotary shaft 3 is engaged with the spring 10 which works to move the movable rotary shaft 3 in the direction away from or approaching the low speed operation switching control magnetic sensor MS. The outer frame 6 forming the frame does not have a hole for inserting the movable rotary shaft 3, and the electric hoist with no load and high speed operation is automatically operated at a high speed without a load, and automatically with a load. Since it can be operated at a low speed, the number of processing steps of the no-load high-speed electric hoist can be reduced, the structure can be simplified, and the no-load high-speed electric hoist can be manufactured at low cost.
【図１】本発明の第１実施例に係る無負荷高速運転電動
巻上機の一部を示す縦断側面図である。FIG. 1 is a vertical sectional side view showing a part of a no-load high-speed operation electric hoisting machine according to a first embodiment of the present invention.
【図２】本発明の第１実施例に係る無負荷高速運転電動
巻上機の一部縦断側面図である。FIG. 2 is a partial vertical cross-sectional side view of a no-load high-speed operation electric hoisting machine according to the first embodiment of the present invention.
【図３】無負荷時における切換制御装置の状態を示す縦
断側面図である。FIG. 3 is a vertical cross-sectional side view showing a state of a switching control device when there is no load.
【図４】負荷時における切換制御装置の状態を示す縦断
側面図である。FIG. 4 is a vertical cross-sectional side view showing a state of the switching control device under load.
【図５】無負荷高速運転および負荷低速運転制御回路を
示す図である。FIG. 5 is a diagram showing a no-load high-speed operation control circuit and a load low-speed operation control circuit.
【図６】本発明の第２実施例に係る無負荷高速運転電動
巻上機の一部を示す縦断側面図である。FIG. 6 is a vertical sectional side view showing a part of a no-load high-speed operation electric hoisting machine according to a second embodiment of the present invention.
【図７】従来の無負荷高速運転電動巻上機の一部を示す
縦断側面図である。FIG. 7 is a vertical sectional side view showing a part of a conventional no-load high-speed operation electric hoisting machine.
【図８】従来の無負荷高速運転電動巻上機の一部縦断側
面図である。FIG. 8 is a partially longitudinal side view of a conventional no-load high-speed operation electric hoisting machine.
【図９】従来の無負荷高速運転電動巻上機の無負荷時に
おける切換制御装置の状態を示す縦断側面図である。FIG. 9 is a vertical cross-sectional side view showing a state of a switching control device of a conventional no-load high-speed operation electric hoist when no load is applied.
【図１０】従来の無負荷高速運転電動巻上機の負荷時に
おける切換制御装置の状態を示す縦断側面図である。FIG. 10 is a vertical cross-sectional side view showing a state of the switching control device when the conventional no-load high-speed operation electric hoisting machine is loaded.
１ 駆動軸 ２ ロードシーブ ３ 可動回転軸 ４ フレーム ５ 磁石 ６ 非磁性材料製外側フレーム ７ 駆動ヘリカル歯車 ８ 定位置回転軸 ９ 従動ヘリカル歯車 １０ ばね １１ 駆動歯車 １２ 従動歯車 １３ 駆動歯車 １４ 従動軸 １５ 従動歯車 １７ 電動巻上機 ２０ 内側フレーム ２１ スラスト軸受 ２２ スラスト軸受 ２３ 押えばね ２６ ロードチェーン ２８ ビス ２９ 保持金具 ３０ 挟持固定用ナット ３１ 挟持固定用ナット ＭＳ 低速運転切換制御用磁気センサー ＰＢ−Ｕ 巻上用押ボタンスイッチ ＰＢ−Ｄ 巻下用押ボタンスイッチ 1 Drive Shaft 2 Load Sheave 3 Movable Rotating Shaft 4 Frame 5 Magnet 6 Outer Frame Made of Non-Magnetic Material 7 Driving Helical Gear 8 Fixed Position Rotating Shaft 9 Driven Helical Gear 10 Spring 11 Drive Gear 12 Drive Gear 13 Drive Gear 14 Driven Shaft 15 Driven Gear 17 Electric hoist 20 Inner frame 21 Thrust bearing 22 Thrust bearing 23 Holding spring 26 Load chain 28 Screw 29 Holding metal fitting 30 Holding clamp nut 31 Holding fixation nut MS Magnetic sensor for low speed operation switching PB-U For winding Pushbutton switch PB-D Pushbutton switch for unwinding
Claims (1)
１とロードシーブ２との間に歯車減速機構を介在させた
電動巻上機において、駆動軸１以外の可動回転軸３を電
動巻上機のフレーム４により回転および摺動自在に支承
し、その可動回転軸３の端部およびその端部に固定され
た磁石５を、前記フレーム４を構成する非磁性材料製外
側フレーム６により被覆し、前記可動回転軸３に駆動ヘ
リカル歯車７を固定し、その可動回転軸３と平行に配置
されてフレーム４により回転自在にかつ摺動不能に支承
されている定位置回転軸８に、前記駆動ヘリカル歯車７
に噛み合う従動ヘリカル歯車９を固定し、負荷時に可動
回転軸３の磁石５により操作される低速運転切換制御用
磁気センサーＭＳを、前記外側フレーム６の外部に固定
し、前記可動回転軸３に、これを低速運転切換制御用磁
気センサーＭＳから離反または接近する方向に移動させ
るように働くばね１０を係合させた無負荷高速運転電動
巻上機。1. An electric hoist in which a gear reduction mechanism is interposed between a drive shaft 1 rotated by a rotor of an electric motor and a load sheave 2, and a movable rotary shaft 3 other than the drive shaft 1 is replaced by an electric hoist. Is rotatably and slidably supported by the frame 4, and the end of the movable rotary shaft 3 and the magnet 5 fixed to the end are covered by the outer frame 6 made of a non-magnetic material that constitutes the frame 4, The drive helical gear 7 is fixed to the movable rotary shaft 3, and the drive helical gear is attached to a fixed position rotary shaft 8 which is arranged in parallel with the movable rotary shaft 3 and is rotatably and non-slidably supported by a frame 4. Gear 7
The driven helical gear 9 that meshes with is fixed, and the low-speed operation switching control magnetic sensor MS that is operated by the magnet 5 of the movable rotary shaft 3 when loaded is fixed to the outside of the outer frame 6, and the movable rotary shaft 3 is An unloaded high-speed operation electric hoist in which a spring 10 that works to move this in a direction away from or approaching the low-speed operation switching control magnetic sensor MS is engaged.
Priority Applications (17)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35133291A JPH0818799B2 (en) | 1991-12-13 | 1991-12-13 | No load high speed operation electric hoist |
| CS92821A CZ282137B6 (en) | 1991-04-22 | 1992-03-18 | Electrically-operated lifting device |
| US07/853,475 US5284325A (en) | 1991-04-22 | 1992-03-18 | Hoist with load shifted gear, detector, and motor speed changer |
| DK92104854.2T DK0511486T3 (en) | 1991-04-22 | 1992-03-20 | Electric hoist |
| DE69211905T DE69211905T2 (en) | 1991-04-22 | 1992-03-20 | Electric lifting device |
| ES92104854T ES2090391T3 (en) | 1991-04-22 | 1992-03-20 | AN ELECTRIC LIFT. |
| EP92104854A EP0511486B1 (en) | 1991-04-22 | 1992-03-20 | An electric hoist |
| CA002064545A CA2064545C (en) | 1991-04-22 | 1992-03-31 | Electric hoist |
| BG96258A BG60909B1 (en) | 1991-04-22 | 1992-04-20 | Electric hoist |
| BR929201454A BR9201454A (en) | 1991-04-22 | 1992-04-20 | ELECTRIC HOIST |
| KR1019920006687A KR0156266B1 (en) | 1991-04-22 | 1992-04-21 | Electric hoist |
| FI921761A FI101467B (en) | 1991-04-22 | 1992-04-21 | Electric winch |
| MX9201829A MX9201829A (en) | 1991-04-22 | 1992-04-21 | AN ELECTRIC CRANE. |
| NO921539A NO307043B1 (en) | 1991-04-22 | 1992-04-21 | Electric winch or lift device |
| SU925011381A RU2076062C1 (en) | 1991-04-22 | 1992-04-21 | Telpher with electric drive |
| HU9201305A HU216475B (en) | 1991-04-22 | 1992-04-22 | Electrical lifting mechanism |
| CN92102891A CN1044353C (en) | 1991-04-22 | 1992-04-22 | Electric hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35133291A JPH0818799B2 (en) | 1991-12-13 | 1991-12-13 | No load high speed operation electric hoist |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05162978A JPH05162978A (en) | 1993-06-29 |
| JPH0818799B2 true JPH0818799B2 (en) | 1996-02-28 |
Family
ID=18416586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35133291A Expired - Fee Related JPH0818799B2 (en) | 1991-04-22 | 1991-12-13 | No load high speed operation electric hoist |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0818799B2 (en) |
-
1991
- 1991-12-13 JP JP35133291A patent/JPH0818799B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05162978A (en) | 1993-06-29 |
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