JPH0825715B2 - No load high speed operation electric hoist - Google Patents
No load high speed operation electric hoistInfo
- Publication number
- JPH0825715B2 JPH0825715B2 JP11655091A JP11655091A JPH0825715B2 JP H0825715 B2 JPH0825715 B2 JP H0825715B2 JP 11655091 A JP11655091 A JP 11655091A JP 11655091 A JP11655091 A JP 11655091A JP H0825715 B2 JPH0825715 B2 JP H0825715B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary shaft
- speed operation
- load
- movable rotary
- fixed
- 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
Links
- 238000001514 detection method Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
- 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電動巻上機としては、特
開昭５７−３８２９４号公報により公表されているよう
に、間隔を置いて設けられたホイスト本体支持用脚の間
に、内吊りケースを昇降自在に嵌入した外吊りケースを
配置し、各ホイスト本体支持用脚の透孔と外吊りケース
の透孔と内吊りケースの動作空隙とにわたって支持ピン
を挿通し、外吊りケースの底部と内吊りケースの底部と
にわたって挿通したワイヤロープの上端部に、内吊りケ
ースの底部に係合する止め金を固定し、外吊りケースの
底部と内吊りケースの底部との間に押上用スプリングを
介在させ、外吊りケースの上部に固定した鉄板に、内吊
りケースの上部に固定した鉄板により操作される負荷−
無負荷検出スイッチを固定し、この負荷−無負荷検出ス
イッチの信号により、無負荷時に電動巻上機を高速運転
すると共に負荷時に電動巻上機を低速運転に切換えるよ
うに構成した電動巻上機が知られている。2. Description of the Related Art Conventionally, as an electric hoisting machine which automatically operates a motor of an electric hoisting machine at a high speed when there is no load, and automatically switches the electric motor to a low speed operation when there is a load, Japanese Patent Application Laid-Open No. 57-57287. As disclosed in Japanese Patent Laid-Open No. 38294, an outer hanging case in which an inner hanging case is vertically movable is arranged between the hoist body supporting legs provided at intervals, and each hoist body supporting leg is arranged. The support pin is inserted through the through hole of the outer hanging case, the through hole of the outer hanging case, and the operation gap of the inner hanging case, and the inner hanging case is attached to the upper end of the wire rope that is inserted between the bottom of the outer hanging case and the bottom of the inner hanging case. The stopper plate that engages with the bottom part of the inner hanging case is fixed, and the spring for pushing up is interposed between the bottom part of the outer hanging case and the bottom part of the inner hanging case. To The load being operated by the boss was iron -
An electric hoist configured such that the no-load detection switch is fixed and the electric hoist is operated at high speed when there is no load and the electric hoist is switched to low speed when there is a load by the signal of this load-no-load detection switch. It has been known.
【０００３】[0003]
【発明が解決しようとする課題】前記従来の電動巻上機
の場合は、ホイスト本体の外部に、一対の脚と内吊りケ
ースを収容した外吊りケースとを備えている大型の負荷
−無負荷検出装置を設けているので、電動巻上機が大型
になり、また負荷−無負荷検出装置の構造も複雑である
という問題がある。In the case of the above-mentioned conventional electric hoist, a large load-no load having a pair of legs and an outer hanging case accommodating an inner hanging case is provided outside the hoist body. Since the detection device is provided, there is a problem that the electric hoist becomes large and the structure of the load-no-load detection device is complicated.
【０００４】[0004]
【課題を解決するための手段】本発明は、前述の問題を
有利に解決するために、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５
が固定し、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６に、前記駆動ヘリカル歯車５に噛み合う従
動ヘリカル歯車７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８を係合させている。In order to advantageously solve the above-mentioned problems, the present invention provides an electric motor having a gear reduction mechanism interposed between a drive shaft 1 and a load sheave 2 rotated by a rotor of an electric motor. In the hoisting machine, the movable rotary shaft 3 other than the drive shaft 1 is rotatably and slidably supported by the frame 4 of the electric hoisting machine, and the movable helical shaft 5 is driven by the movable helical shaft 5.
Is fixed, and a driven helical gear 7 that meshes with the drive helical gear 5 is fixed to a fixed-position rotating shaft 6 that is arranged parallel to the movable rotating shaft 3 and is rotatably and non-slidingly supported by a frame 4. However, the low-speed operation switching control limit switch LS that is operated by the movable rotary shaft 3 under load
Is fixed to the frame 4, and the movable rotary shaft 3 is engaged with a spring 8 which works to separate the movable rotary shaft 3 from the low speed operation switching control limit switch LS.
【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９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９のフレーム４
により軸受を介して支承され、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
１０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５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１１に噛み
合う従動歯車１２が圧入により一体に固定され、前記駆
動ヘリカル歯車５とフレーム４の内面との間にスラスト
軸受１３が設けられ、従動歯車１２とフレーム４の内面
との間にスラスト軸受１４が設けられ、そのスラスト軸
受１４と可動回転軸３の中間段部との間に、その可動回
転軸３を押圧するばね８が介在されている。また駆動ヘ
リカル歯車５の端部側に設けられた環状凹部の底部とス
ラスト軸受１３との間に、そのスラスト軸受１３を押え
るための押えばね３４が介在され、この押えばね３４の
反発力は前記ばね８の反発力よりも弱く設定されてい
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 hoist 9 is a frame 4 of the electric hoist 9.
A movable rotary shaft 3 supported by a bearing 10 provided on a frame 4 is rotatably and slidably supported by a bearing 10 provided on a frame 4. The drive helical gear 5 is integrally provided with the driven gear 12, and the driven gear 12 meshing with the drive gear 11 provided on the drive shaft 1 is integrally fixed by press-fitting between the drive helical gear 5 and the inner surface of the frame 4. A thrust bearing 13 is provided, a thrust bearing 14 is provided between the driven gear 12 and the inner surface of the frame 4, and the movable rotary shaft 3 is provided between the thrust bearing 14 and the intermediate step portion of the movable rotary shaft 3. A pressing spring 8 is interposed. Further, a pressing spring 34 for pressing the thrust bearing 13 is interposed between the bottom of an annular recess provided on the end side of the drive helical gear 5 and the thrust bearing 13, and the repulsive force of the pressing spring 34 is the above-mentioned. It is set to be weaker than the repulsive force of the spring 8.
【０００６】可動回転軸３に平行な定位置回転軸６は、
フレーム４により軸受１５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６に、前記駆動ヘリ
カル歯車５に噛み合う従動ヘリカル歯車７と駆動歯車１
６とが固定され、前記定位置回転軸６に平行に配置され
てフレーム４により軸受１７により回転自在に支承され
ている従動軸１８に、前記定位置回転軸６の駆動歯車１
６に噛み合う従動歯車１９が固定されると共に、ロード
チェーン２０を巻掛けたロードシーブ２が固定され、さ
らに従動軸１８の中間部とフレーム４の従動軸挿通孔と
の間にシールリング２１が嵌設されている。The fixed position rotary shaft 6 parallel to the movable rotary shaft 3 is
A driven helical gear 7 and a drive gear 1 which are rotatably and non-slidably supported by a frame 4 via a bearing 15 and mesh with the drive helical gear 5 on the fixed position rotary shaft 6.
6 is fixed to the driven shaft 18, which is arranged parallel to the fixed position rotary shaft 6 and is rotatably supported by the bearing 17 by the frame 4, and the drive gear 1 of the fixed position rotary shaft 6
6 is fixed, the load sheave 2 around which the load chain 20 is wound is fixed, and the seal ring 21 is fitted between the intermediate portion of the driven shaft 18 and the driven shaft insertion hole of the frame 4. It is set up.
【０００７】前記可動回転軸３の一端部はフレーム４の
外面に露出され、その可動回転軸３の一端部に設けられ
た雌ねじ孔に、球体からなるリミットスイッチ操作部材
２２に連設された螺杆が螺合固定され、そのリミットス
イッチ操作部材２２により操作されるレバー２３を有す
る低速運転切換制御用リミットスイッチＬＳは前記フレ
ーム４に固定されている。One end of the movable rotary shaft 3 is exposed on the outer surface of the frame 4, and a female screw hole provided at one end of the movable rotary shaft 3 has a screw rod connected to a limit switch operating member 22 made of a sphere. Is fixed by screwing, and the limit switch LS for low-speed operation switching control having a lever 23 operated by the limit switch operating member 22 is fixed to the frame 4.
【０００８】図５は低速運転切換制御用リミットスイッ
チＬＳ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ＭＣ
２からなる巻下回路と、直列に接続された巻下用リレー
ＭＣ２のＡ接点ＭＣ２−ａ，リミットスイッチＬＳのＡ
接点ＬＳ−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，リ
ミットスイッチＬＳのＢ接点ＬＳ−ｂ，低速用リレーＭ
Ｃ４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ＬＳ−ａの間と、
高速回路におけるＡ接点ＭＣ１−ａおよびＢ接点ＬＳ−
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ＬＳ−ａおよびＢ接点ＭＣ
３−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９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ＭＣ１−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 no-load high-speed operation and load low-speed operation control circuit using a low-speed operation changeover control limit switch LS, which is connected to power supply lines S and T through a voltage drop transformer Tr. A hoisting circuit composed of a hoisting pushbutton switch PB-U and a hoisting relay MC1 connected in series to the operating power supply, and a hoisting pushbutton switch PB-D and hoisting circuit connected in series. Relay MC
2, a lowering circuit, an A contact MC2-a of a lowering relay MC2 connected in series, and an A of a limit switch LS.
Contact LS-a, B contact of high speed relay MC3 MC3-b
And a low speed circuit consisting of a low speed relay MC4, an A contact MC1-a of a hoisting relay MC1 connected in series, a B contact LS-b of a limit switch LS, and a low speed relay M.
And fast circuit consisting of B contact MC4-b and the high-speed relay MC3 of C4 is connected and one end of the self-retaining contact A MC4-a 1 in the low speed relay MC4 is, the A contact MC2-a and in the slow circuit Between the A contact LS-a,
A contact MC1-a and B contact LS- in high-speed circuits
The other end of the A contact MC4-a 1 is connected to the B contact point between the b contact point b and the A contact point LS-a and the B contact point MC in the low speed circuit.
It is connected between 3-b. Further, the electric motor M of the electric hoisting machine 9 composed of a 2-pole and 4-pole pole change motor is
A contact MC3-a of high speed relay MC3 and A contact MC4-a of low speed relay MC4, and hoisting relay MC1
Is connected to the power supply lines R, S, and T via the A contact MC1-a of the above and the A contact MC2-a of the winding relay MC2.
【０００９】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６に固定された従動ヘリカル歯車７に噛み合う駆
動ヘリカル歯車５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８を圧縮しながら
リミットスイッチＬＳに向かって移動し、可動回転軸３
により、リミットスイッチＬＳが切換えられて、Ａ接点
ＬＳ−ａがオンになると共にＢ接点ＬＳ−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 acts during the hoisting operation of the electric motor M, a movable force is generated by a component force in the movable rotary shaft longitudinal direction based on the inclination of the teeth of the drive helical gear 5 meshing with the driven helical gear 7 fixed to the fixed position rotary shaft 6. The shaft 3 moves toward the limit switch LS while compressing the spring 8, and the movable rotary shaft 3
As a result, the limit switch LS is switched so that the A contact LS-a is turned on and the B contact LS-b is turned off.
【００１０】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、無負荷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 pushed, as in the case of the hoisting operation, the no-load high speed operation is automatically switched to the load low speed operation.
【００１１】図６ないし図８は本発明の第２実施例を示
すものであって、可動回転軸３の露出部と低速運転切換
制御用リミットスイッチＬＳとの間において、フレーム
４の外面にコ字状の支持金具２４が配置され、その支持
金具２４の中間板２５にばね保持用突起が切り越し形成
され、支持金具２４の両側の側板２６，２７に開口部２
８が設けられ、支持金具２４の中間板２５はフレーム４
の外面に重合されてビス２９により固定されている。金
属板製操作レバー３０の中間部にばね保持用突起３１が
切り越し形成され、前記操作レバー３０は支持金具２４
における各側板２６，２７の開口部２８に挿通され、か
つ支持金具２４の中間板２５とレバー２９の中間部との
間にレバー押圧用ばね３２が介在され、操作レバー３０
の一端部は、可動回転軸３の端部に設けられた球状のレ
バー操作部材３３に係合され、電動巻上機９に負荷が作
用して、可動回転軸３がばね８を圧縮しながら移動する
と、レバー操作部材３３によって操作レバー３０の一端
部が押圧され、その操作レバー３０が、側板２６との接
触部を中心として回動して、低速運転切換制御用リミッ
トスイッチＬＳのレバー２３を操作するように構成され
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。6 to 8 show a second embodiment of the present invention, in which an outer surface of the frame 4 is provided with a coil between the exposed portion of the movable rotary shaft 3 and the low speed operation changeover control limit switch LS. A supporting bracket 24 having a V-shape is arranged, and a spring holding projection is formed by cutting through an intermediate plate 25 of the supporting bracket 24, and the openings 2 are formed in the side plates 26 and 27 on both sides of the supporting bracket 24.
8 is provided, and the intermediate plate 25 of the support fitting 24 is the frame 4
Is fixed on the outer surface of the sheet with screws 29. A spring holding projection 31 is cut and formed in an intermediate portion of the metal plate operating lever 30, and the operating lever 30 is supported by a support fitting 24.
Of the side plates 26, 27 of the lever 24, the lever pressing spring 32 is interposed between the intermediate plate 25 of the support fitting 24 and the intermediate portion of the lever 29, and the operating lever 30 is inserted.
Is engaged with a spherical lever operating member 33 provided at the end of the movable rotary shaft 3 and a load is applied to the electric hoisting machine 9 so that the movable rotary shaft 3 compresses the spring 8. When moved, one end portion of the operation lever 30 is pressed by the lever operation member 33, and the operation lever 30 rotates about the contact portion with the side plate 26 to move the lever 23 of the low speed operation changeover control limit switch LS. Although it is configured to operate, the other configurations are the same as those in the first embodiment.
【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リミットスイッチＬＳが動作して
バタツキ現象が生じるので不適当である。前記リミット
スイッチＬＳ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 inappropriate because the limit switch LS operates to cause a flapping phenomenon. In order to stabilize the operation of the limit switch LS, it is effective to set the movable rotary shaft to be a shaft apart from the drive shaft other than the drive shaft, but it is effective. 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】[0014]
【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、前記可動回転軸３
に駆動ヘリカル歯車５が固定し、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６に、前記駆動ヘリカ
ル歯車５に噛み合う従動ヘリカル歯車７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、これを前記リミットスイッチＬＳか
ら離反させるように働くばね８を係合させたので、電動
巻上機本体の外部に低速運転切換制御用リミットスイッ
チＬＳを操作する大型の操作装置を設けることなく、簡
単な操作装置によって前記低速運転切換制御用リミット
スイッチＬＳを操作することができ、したがって、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
低速運転する無負荷高速運転電動巻上機を小型にかつ低
コストで製作できる。また特に本発明の場合は、低速運
転切換制御用リミットスイッチＬＳを可動回転軸３によ
り操作するように構成したので、そのリミットスイッチ
ＬＳをフレーム４の外部に取付けることができ、そのた
めリミットスイッチＬＳの取付け，交換および調整等を
容易に行なうことができる。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.
Rotatably and slidably supported by the movable rotary shaft 3
A driving helical gear 5 is fixed to the fixed helical gear 5, and the driven helical gear 5 meshes with a fixed position rotating shaft 6 which is rotatably and non-slidingly supported by a frame 4 and arranged parallel to the movable rotating shaft 3. The helical gear 7 is fixed, and a low-speed operation switching control limit switch LS that is operated by the movable rotary shaft 3 when loaded is fixed to the frame 4, and the movable rotary shaft 3 is separated from the limit switch LS. Since the spring 8 that works as described above is engaged, the low speed operation switching control is performed by a simple operation device without providing a large operation device for operating the low speed operation switching control limit switch LS outside the electric hoist body. Limit switch LS can be operated, and therefore, high-speed operation is automatically performed under no load, and low-speed operation is automatically performed under load. The high-speed operation electric hoist can be made compact in low cost. Further, particularly in the case of the present invention, since the limit switch LS for low speed operation switching control is configured to be operated by the movable rotary shaft 3, the limit switch LS can be attached to the outside of the frame 4, and therefore the limit switch LS Easy installation, replacement and adjustment.
【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
巻上機の一部縦断側面図である。FIG. 6 is a side view, partly in vertical section, of a no-load high-speed operation electric hoisting machine according to a second embodiment of the present invention.
【図７】図６の一部を拡大して示す縦断側面図である。FIG. 7 is a vertical cross-sectional side view showing a part of FIG. 6 in an enlarged manner.
【図８】第２実施例に係る無負荷高速運転電動巻上機に
おけるスイッチ操作部を示す正面図である。FIG. 8 is a front view showing a switch operating unit in the no-load high-speed operation electric hoisting machine according to the second embodiment.
１ 駆動軸 ２ ロードシーブ ３ 可動回転軸 ４ フレーム ５ 駆動ヘリカル歯車 ６ 定位置回転軸 ７ 従動ヘリカル歯車 ８ ばね ９ 電動巻上機 １１ 駆動歯車 １２ 従動歯車 １３ スラスト軸受 １４ スラスト軸受 １６ 駆動歯車 １９ 従動歯車 ２０ ロードチェーン ２２ リミットスイッチ操作部材 ２３ レバー ２４ 支持金具 ２６ 側板 ２７ 側板 ２８ 開口部 ３０ 操作レバー ３２ レバー押圧用ばね ＬＳ 低速運転切換制御用リミットスイッチ 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 Drive Helical Gear 6 Fixed Position Rotating Shaft 7 Driven Helical Gear 8 Spring 9 Electric Hoisting Machine 11 Drive Gear 12 Drive Gear 13 Thrust Bearing 14 Thrust Bearing 16 Drive Gear 19 Drive Gear 20 load chain 22 limit switch operating member 23 lever 24 support metal fitting 26 side plate 27 side plate 28 opening 30 operation lever 32 lever pressing spring LS low speed operation switching control limit switch PB-U hoisting push button switch PB-D unwinding Push button switch
Claims (1)
１とロードシーブ２との間に歯車減速機構が介在されて
いる電動巻上機において、駆動軸１以外の可動回転軸３
が、電動巻上機のフレーム４により回転および摺動自在
に支承され、前記可動回転軸３に駆動ヘリカル歯車５が
固定され、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６に、前記駆動ヘリカル歯車５に噛み合う従
動ヘリカル歯車７が固定され、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Ｌ
Ｓは前記フレーム４に固定され、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８が係合されている無負荷高速
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 rotatably and slidably supported by a frame 4 of an electric hoist, a drive helical gear 5 is fixed to the movable rotary shaft 3, and the drive helical gear 5 is arranged parallel to the movable rotary shaft 3 so as to be rotatable by the frame 4. Further, a driven helical gear 7 that meshes with the drive helical gear 5 is fixed to a fixed position rotary shaft 6 that is non-slidingly supported, and a low-speed operation switching control limit switch L that is operated by the movable rotary shaft 3 when loaded.
S is fixed to the frame 4 and is attached to the movable rotary shaft 3.
An unloaded high-speed operation electric hoisting machine in which a spring 8 that works to separate it from the low-speed operation switching control limit switch LS is engaged.
Priority Applications (18)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11655091A JPH0825715B2 (en) | 1991-04-22 | 1991-04-22 | No load high speed operation electric hoist |
| ZA921953A ZA921953B (en) | 1991-04-22 | 1992-03-17 | An electric hoist |
| US07/853,475 US5284325A (en) | 1991-04-22 | 1992-03-18 | Hoist with load shifted gear, detector, and motor speed changer |
| CS92821A CZ282137B6 (en) | 1991-04-22 | 1992-03-18 | Electrically-operated lifting device |
| 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 | ELECTROTELFER |
| BR929201454A BR9201454A (en) | 1991-04-22 | 1992-04-20 | ELECTRIC HOIST |
| KR1019920006687A KR0156266B1 (en) | 1991-04-22 | 1992-04-21 | Electric hoist |
| MX9201829A MX9201829A (en) | 1991-04-22 | 1992-04-21 | AN ELECTRIC CRANE. |
| FI921761A FI101467B1 (en) | 1991-04-22 | 1992-04-21 | An electric winch |
| SU925011381A RU2076062C1 (en) | 1991-04-22 | 1992-04-21 | Telpher with electric drive |
| NO921539A NO307043B1 (en) | 1991-04-22 | 1992-04-21 | Electric winch or lift device |
| HU9201305A HU216475B (en) | 1991-04-22 | 1992-04-22 | Electric lifting device |
| CN92102891A CN1044353C (en) | 1991-04-22 | 1992-04-22 | electric hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11655091A JPH0825715B2 (en) | 1991-04-22 | 1991-04-22 | No load high speed operation electric hoist |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04323197A JPH04323197A (en) | 1992-11-12 |
| JPH0825715B2 true JPH0825715B2 (en) | 1996-03-13 |
Family
ID=14689895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11655091A Expired - Fee Related JPH0825715B2 (en) | 1991-04-22 | 1991-04-22 | No load high speed operation electric hoist |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0825715B2 (en) |
| ZA (1) | ZA921953B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0673697B2 (en) * | 1987-10-24 | 1994-09-21 | 株式会社共立合金製作所 | Nozzle for scale removal |
| US5158235A (en) * | 1991-02-19 | 1992-10-27 | Elwood Hydraulics Company, Inc. | Turbulence-quelling fluid-flow controller and method |
-
1991
- 1991-04-22 JP JP11655091A patent/JPH0825715B2/en not_active Expired - Fee Related
-
1992
- 1992-03-17 ZA ZA921953A patent/ZA921953B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04323197A (en) | 1992-11-12 |
| ZA921953B (en) | 1992-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |