CN2116683U - Protection device for electric crane lead - Google Patents
Protection device for electric crane lead Download PDFInfo
- Publication number
- CN2116683U CN2116683U CN 92207037 CN92207037U CN2116683U CN 2116683 U CN2116683 U CN 2116683U CN 92207037 CN92207037 CN 92207037 CN 92207037 U CN92207037 U CN 92207037U CN 2116683 U CN2116683 U CN 2116683U
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- clamping plate
- movable pulley
- screw rod
- straight trough
- switch
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Abstract
Disclosed is a protection device for electric crane lead, comprising an upper fixing pulley wheel, a lower fixing pulley wheel and a middle moving pulley wheel which are arranged between two clamp plates, an elastic force applying device which drives the moving pulley wheel to laterally move, a normal closing type limit switch which is communicated with an electric crane and is started and stopped by the moving pulley wheel. A wire cable is respectively wound through the opposite sides among the fixing pulley wheels and the moving pulley wheel. When the wire cable is stopped and is lowered because the lower end of the wire cable contacts a loading object, the power supply of the electric crane can be cut off in short time for preventing that the wire cable is twisted because the wire cable is continuously lowered and is loosened. The utility model which has the advantages of simple device and reliable control can be matched with a winding engine.
Description
The utility model relates to a kind of switch with mechanical contact, particularly a kind of full helical pitch fender guard of electric block that is particularly suited for the electric block adapted.
Existing lifting with the steel rope on the reel of electric block be tauted or basic tensioned state under, rely on the associated mechanisms on the cucurbit, be neat winding regularly; And when the steel rope relaxed state, work, just be easy on reel strand disorderly, hang, as untimely adjustment and work on, steel rope will rupture.The relaxed state of above-mentioned steel rope generally takes place after suspension hook arrives the loading and unloading face of appointment.For avoiding the problems referred to above to take place, prior art is: after steel rope is transferred to suspension hook in certain appointment loading and unloading face (as ground or vehicle load carrying floor), with set screw that the remainder steel rope on the reel is fixing dead.Like this, in case when suspension hook was run into lifting thing on this loading and unloading face, steel rope just can not continue to transfer again, causes the problem of hanging with regard to steel rope can not take place after relaxing yet.But the fixing method of this set screw can only be applicable to the loading and unloading face of a height of one-stop operation, therefore, need climb on the cucurbit according to difference loading and unloading face and regulate at any time.Obviously, this is the thing of ten minutes trouble, does not tackle the problem at its root as yet.
The purpose of this utility model is to provide a kind of device, and it can guarantee can not make basically when suspension hook touches lifting thing on the loading and unloading face steel rope to continue to descend, and even makes steel rope lax and hang.Require this apparatus structure simple, use reliable, easy to operate.
For achieving the above object, the utility model spy provides a kind of electric block full helical pitch fender guard, and it comprises a pair of clamping plate, its two rope guide that are fixed in electric block relatively, and spaced in parallel to each other turning up the soil be fixedly linked, and has a straight trough respect to one another on each plate; One movable pulley, it is installed in two clamping plate, and its center shaft can be free to slide in above-mentioned straight trough; Two fixed pulleys also are installed in two clamping plate and are positioned at the both sides of above-mentioned straight trough, and the line at this two fixed pulleys center is perpendicular to straight trough and be positioned at the straight trough length range; One puts on the device of above-mentioned movable pulley one adjustable elastic power, and it forces in movable pulley so that movable pulley moves along above-mentioned straight trough; And, one limit switch, with respect to the application of force direction of its installation site of movable pulley along above-mentioned elastic force force application apparatus, its normally closed interlock extends along the straight trough line of centers, even and this switch position determine to make that contact also can be opened when movable pulley reaches maximum and moves journey.This switch links to each other with the stall switch leads of hoist ceiling crane.Steel rope is walked around a side that faces limit switch of movable pulley and an opposite side of each fixed pulley respectively.
Specifically, above-mentioned force application apparatus to movable pulley comprises: one is clipped in two clamping plate and " Jiong " shape guide runner slidably, and nearly its opening part on its dual-side has two relative circular holes, and above-mentioned movable pulley axle is through in this two hole; One is clipped in " Jiong " shape spring perch in two clamping plate regularly, and it seals the limit a centre hole; One screw rod, one end are fixed in slide block and seal limit and the removable spring perch centre hole that passes freely; One compression spring is enclosed within on the screw rod; And one is bolted in another free-ended setting nut of screw rod.Like this, above-mentioned stage clip is held between this nut and the above-mentioned spring perch, the trend that both paste mutually thereby maintenance pulls to spring perch with above-mentioned guide runner.
The movable pulley axle can break away from and the contacting of limit switch contact when furtherly, the identification of position of above-mentioned limit switch should make contact closure when above-mentioned switch; In addition, above-mentioned a pair of clamping plate can be connected in the rope guide of electric block by a connecting rod relative fixed.
As will be by this electric block of above-mentioned design when full helical pitch fender guard and electric block adapted, when suspension hook descends (following hook or hang goods down) in the steel rope lower end with steel rope, steel rope conducted oneself with dignity by suspension hook or cargo weight stretching, make the limit switch closure, hoist ceiling crane is running as usual; Stop to descend in case suspension hook or goods are run into a certain loading and unloading face, make steel rope a little lax a little, make movable pulley try hard to recommend moving contact of pushing limit switch open down like this, cause the hoist ceiling crane stall at stage clip but still transfer steel rope in running because of hoist ceiling crane suddenly.Like this, can make steel rope no longer transfer and take place undue lax and hang.Obviously, in case as consider the more variation of the transmission friction situation of change steel rope and total system, as long as adjusting the elastic force setting nut a little just can work as usual, therefore, just fundamentally solved foregoing problem.
Understand for ease of the purpose of this utility model, structure and advantage being had more clearly, now be illustrated in conjunction with its accompanying drawing with two embodiment.Wherein accompanying drawing is:
The scheme drawing of embodiment when Fig. 1 is applied to the hoist ceiling crane situation for the utility model;
Fig. 2 is the connecting rod in embodiment illustrated in fig. 1 and clamping plate structural representation after being removed;
Fig. 3 is the cutaway view of adjustable elastic power force application apparatus; And
Fig. 4 is the scheme of installation behind the adjustable elastic power force application apparatus changing of design in the foregoing description.
As illustrated in fig. 1 and 2, the full helical pitch fender guard of electric block of the present utility model comprises:
One connecting rod 1, its upper end is fixedly connected on the rope guide (not shown) of electric block, and its lower end then links to each other with the clamping plate of this switch (below talk about);
A pair of clamping plate 2, its upper end links to each other with above-mentioned connecting rod 1, and is fixedly linked by screw 9 spaced in parallel to each other turning up the soil, and respectively has a straight trough 21 respect to one another on two plates;
One movable pulley 7, it is installed in two clamping plate 2, and its center shaft 71 can be free to slide in straight trough 21;
Two fixed pulleys 5 also are installed in two clamping plate 2 and lay respectively at the upper and lower side of straight trough 21, and the line at its center of two is perpendicular to straight trough 21 and be positioned at straight trough 21 length ranges;
One adjustable elastic power force application apparatus 4, it is positioned at a side of above-mentioned three pulleys.By Fig. 2 and 3 as can be known, it comprises: one " Jiong " shape guide runner 44, and it is sandwiched in two clamping plate 2 and slidably, and the nearly opening part on its dual-side has two relative circular holes to install above-mentioned movable pulley center shaft 71; One " Jiong " shape spring perch, it is sandwiched in two clamping plate 2 regularly, and it seals a centre hole on the limit; One screw rod 43, one end are fixed in slide block 44 and the removable centre hole that passes spring perch 45 freely; One stage clip 41 is sleeved on the screw rod 43; And one is bolted in the setting nut 42 on another free end of screw rod 43, and one of above-mentioned stage clip end is withstood on the spring perch 45, the other end then forces on the above-mentioned setting nut 42, like this, under the spring force effect, slide block 44 keeps a kind of trend that is pulled to spring perch 45 and both are pasted mutually; And
One limit switch 3, it is a kind of closed type switch, and it is arranged on the left side of movable pulley 7, and its normally closed interlock 31 extends along the line of centers of elongated slot 21, even and the position of this switch should make and reach maximum at movable pulley 7 and move journey, contact also can be opened fully when promptly slide block 44 was blocked by spring perch 45; On the contrary, when this contact closure, movable pulley center shaft 71 should break away from contact and contacts.Like this, after above-mentioned force application apparatus 4 spurred movable pulley 7 by slide block 44, axle 71 just can be pushed normally closed interlock 31 open among the movable pulley 7.This switch is connected with the stall switch leads of hoist ceiling crane, thus, can disconnect the hoist ceiling crane power supply and makes its stall.
As shown in Figure 2, the steel rope 6 that is put down by the hoist ceiling crane rope guide is the outside (side of limit switch dorsad), the inboard (towards a side of limit switch) of movable pulley 7 groovings and the outside (side of limit switch dorsad) of below fixed pulley 8 groovings of pile warps top fixed pulley 5 groovings successively.Like this, (as shown in Figure 1) when steel rope 6 be subjected to being suspended in its lower end suspension hook weight or when having lifted goods, then be straightened, this moment, movable pulley 7 was through slide block 44, screw rod 43, overcome stage clip 41 elastic force, be pulled to the outside along straight trough 21, like this, movable pulley center shaft 71 breaks away from and the contacting of limit switch normally closed interlock 31, and normally closed interlock 31 is with regard to auto-closing again.Therefore, electric block normal operation and will restrict and transfer slowly.And meet certain when specifying Loaded goods or loading and unloading face when suspension hook or goods, because the continuing of steel rope transferred, make to become lax (as shown in Figure 2), at this moment, owing to spring force passes through screw rod 43, slide block 44 with movable pulley layback inwardly, therefore, contact 31 is pushed, and cut off the hoist ceiling crane power supply, like this, steel rope is no longer transferred.So, just can not take place as in the prior art, when steel rope continues to transfer and the phenomenon that too relaxes and treat to reverse once more and can hang when carrying.Obviously, the function of parking of this automatic guidance steel rope all is an actv. for any one loading and unloading face, has overcome disadvantage that loading surface need be done once to adjust in the past fully.As consider just in case need more renew the variation of steel rope or spring force, also just can as long as adjust screw pitch nut 42 a little.
Except structure situation recited above, other has a kind of situation to be: as shown in Figure 4, steel rope around direction just with above-mentioned opposite, the structure of elastic force force application apparatus 4 at this moment and limit switch slightly difference of position is set.Elastic force force application apparatus 4 ' composition be: on the screw rod 43 that is fixed on slide block 44, be with a compression spring 41, have again an adjustable spring perch 42 ', it can be sleeved on the screw rod 43 perpendicular to the centre hole on the upstanding portion of clamping plate 2 with being free to slide; Again by screw 9 is passed its smooth in clamping plate 2 supporting part and two slotted holes 421 on the clamping plate 2 ', and this spring perch is fixed on the clamping plate 2 adjustablely, promptly this spring perch can be along its fixed position of screw rod 43 axial adjustment, at the elastic force (pre compressed magnitude) of adjustable clamp, to adapt to the needs of different steel rope 6 to this elastic force at the stage clip between it and the slide block 44.In addition, the purpose of being blocked by spring perch 45 to moving to left under the spring force effect with slide block 44 in embodiment illustrated in fig. 2 is the same, threaded end at screw rod 43 also is screwed with a stop nut 45, is used to make stop screw rod too to move to right when steel rope is lax and cause steel rope too lax.
In addition, the limit switch 3 in this embodiment shown in Figure 4 is the outsides that are contained in movable pulley.Equally, its position is provided with and must makes: after suitably regulating the elastic force of stage clip 41, when steel rope is stretching, the movable pulley center shaft is broken away from contact with limit switch normally closed interlock 31, and make contact closure, and when steel rope is lax, can back down contact to cut off hoist ceiling crane work.
Be not difficult to find out that the utility model is also applicable on the winch.At this moment, steel rope is the level of state, and lays so this switch will be turned over 90 °, and its principle of work is identical.
Claims (6)
1, the full helical pitch fender guard of a kind of electric block is characterized in that it comprises: a pair of clamping plate 2, and its two rope guide that are fixed in electric block relatively, and spaced in parallel to each other turning up the soil be fixedly linked, and has a straight trough 21 respect to one another on each plate; One movable pulley 7, it is installed in the two described clamping plate 2, and its center shaft 71 can be free to slide in described straight trough 21; Two fixed pulleys 5 and 8 also are installed in the two described clamping plate 2 and are positioned at the both sides of described straight trough 21, its two center continuously perpendicular to described straight trough 21 and be positioned at the length range of described straight trough 21; One puts on the device 4 (4 ') of described movable pulley 7 one adjustable elastic power, and it forces in described movable pulley 7, so that this movable pulley moves along described straight trough 21; And, one limit switch 3, with respect to the application of force direction of described movable pulley 7 its installation sites along described elastic force force application apparatus 4 (4 '), its normally closed interlock 31 extends along the line of centers of described elongated slot 21, even and the position of this switch should make that contact also can be opened when described movable pulley 7 reaches maximum and moves journey, this switch links to each other with hoist ceiling crane stall switch; Steel rope 6 is walked around that side of the described limit switch 3 of facing of described movable pulley 7 and an opposite side of two described fixed pulleys 5 and 8 respectively.
2, the full helical pitch fender guard of electric block as claimed in claim 1, it is characterized in that, described elastic force force application apparatus 4 comprises: one is clipped in the two described clamping plate 2 and " Jiong " shape guide runner 44 slidably, nearly its opening part on its dual-side has two relative circular holes, and described movable pulley axle 71 is through in this two circular hole; One is clipped in " Jiong " shape spring perch 45 in the two described clamping plate 2 regularly, and it seals that side along the elastic force direction of sealing the limit that the limit is positioned at described slide block, has a centre hole on it; What one screw rod 43, one end were fixed in described slide block 44 seals limit and the removable centre hole that passes described spring perch 45 freely; One compression spring 41, it is enclosed within on the described screw rod 43; And one is bolted in another free-ended setting nut 42 of described screw rod 43.
3, the full helical pitch fender guard of electric block as claimed in claim 1, it is characterized in that, described elastic force force application apparatus 4 ' comprising: one is clipped in the two described clamping plate 2 and slidably " Jiong " shape guiding slip 44, nearly its opening part on its dual-side has two relative circular holes, and described movable pulley axle 71 is through in this two circular hole; One screw rod 43, one end are fixed on the limit of sealing of described slide block 44; One adjustable spring perch 42 ', its centre hole perpendicular to the upstanding portion of described clamping plate 2 can be sleeved on the described screw rod 43 with being free to slide, and by screw 9 is passed its smooth in described clamping plate 2 supporting part and two slotted holes 421 on the described clamping plate 2 ', and with this spring perch 42 ' be fixed on the described clamping plate 2 adjustablely; One compression spring 41, be enclosed within on the described screw rod 43 and be held on described slip 44 seal limit and described spring perch 42 ' upstanding portion between; And a stop nut 45, it is screwedly mounted on another free end of described screw rod 43 and is positioned at the outside of described spring perch 42 ' upstanding portion.
4, the full helical pitch fender guard of electric block as claimed in claim 1 is characterized in that, the position of described limit switch 3 should make when the normally closed interlock closure of described switch, axle 71 disengagings of described movable pulley and contacting of this contact.
5, the full helical pitch fender guard of electric block as claimed in claim 1 or 2 is characterized in that, described a pair of clamping plate 2 can be connected in the hoist ceiling crane rope guide by a connecting rod 1 relative fixed.
As claim 1 or the full helical pitch fender guard of 3 described electric blocks, it is characterized in that 6, described a pair of clamping plate 2 can be connected in the hoist ceiling crane rope guide by a connecting rod 1 relative fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92207037 CN2116683U (en) | 1992-04-13 | 1992-04-13 | Protection device for electric crane lead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92207037 CN2116683U (en) | 1992-04-13 | 1992-04-13 | Protection device for electric crane lead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2116683U true CN2116683U (en) | 1992-09-23 |
Family
ID=4952842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92207037 Granted CN2116683U (en) | 1992-04-13 | 1992-04-13 | Protection device for electric crane lead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2116683U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175284A (en) * | 2011-01-28 | 2011-09-07 | 江苏润邦重工股份有限公司 | Novel detecting mechanism for rope looseness or chain break |
| CN107021413A (en) * | 2017-05-11 | 2017-08-08 | 中建安装工程有限公司 | A kind of subway track-laying machine suspension bracket descending position limiter |
| CN109287332A (en) * | 2018-10-18 | 2019-02-01 | 沈阳农业大学 | A kind of external power type slip lid greenhouse steel wire rope pre-tightening device and application method |
| CN112551410A (en) * | 2020-12-11 | 2021-03-26 | 国网山东省电力公司潍坊供电公司 | Drain pump anti-toppling traction device for power grid system |
-
1992
- 1992-04-13 CN CN 92207037 patent/CN2116683U/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175284A (en) * | 2011-01-28 | 2011-09-07 | 江苏润邦重工股份有限公司 | Novel detecting mechanism for rope looseness or chain break |
| CN107021413A (en) * | 2017-05-11 | 2017-08-08 | 中建安装工程有限公司 | A kind of subway track-laying machine suspension bracket descending position limiter |
| CN109287332A (en) * | 2018-10-18 | 2019-02-01 | 沈阳农业大学 | A kind of external power type slip lid greenhouse steel wire rope pre-tightening device and application method |
| CN112551410A (en) * | 2020-12-11 | 2021-03-26 | 国网山东省电力公司潍坊供电公司 | Drain pump anti-toppling traction device for power grid system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |