CN102424318B - Fan elevator with mechanical overload protection device - Google Patents
Fan elevator with mechanical overload protection device Download PDFInfo
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- CN102424318B CN102424318B CN201110377089.XA CN201110377089A CN102424318B CN 102424318 B CN102424318 B CN 102424318B CN 201110377089 A CN201110377089 A CN 201110377089A CN 102424318 B CN102424318 B CN 102424318B
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- overload protection
- elevator
- fan elevator
- protection device
- fan
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Abstract
The invention discloses a fan elevator with a mechanical overload protection device. The fan elevator comprises an elevator main frame, a movable type lifting mechanism and an electric control box, wherein the movable type lifting mechanism is arranged on the elevator main frame, the fan elevator also comprises the mechanical overload protection device arranged between the lifting mechanism and the elevator main frame, the mechanical overload protection device is triggered when the load of the fan elevator is greater than or equal to the preset maximum load, and in addition, triggering signals are transmitted into the electric control box through an output port of the mechanical overload protection device. The mechanical overload protection device is arranged on the fan elevator. A disc spring adopted by the fan elevator has the characteristics that the rigidity is high, the buffering and vibration absorption capability is high, and great load can be borne through small deformation. The magnitude of the load can be converted into the moving displacement value through the disc spring.
Description
Technical field
The present invention relates to a kind of fan elevator, particularly relate to a kind of fan elevator with machine overload protection.
Background technology
Overload protection of the prior art, adopts the load limiter of thermal relay to carry out overload protection conventionally.Load measuring cell is assembled in the system of elevator as parts, load weight is converted into electric signal.When load current is over load current value and after certain hour, the heat that heat element produces makes bimetallic plate heated bending in thermal relay, thereby drives moving contact separated with break back contact, cuts off the control loop of electrical motor.
But use the load limiter of thermal relay to there is following shortcoming: the components and parts of thermal relay are easily aging, poor repeatability, easily there is being difficult to after thermal fatigue, overheated several the state that recovers original in bimetallic plate.
Summary of the invention
The technical problem to be solved in the present invention is easily aging in order to overcome the thermal relay of available technology adopting, and the defect of poor repeatability, provides a kind of fan elevator with machine overload protection.
The present invention solves above-mentioned technical matters by following technical proposals: a kind of fan elevator with machine overload protection, described fan elevator comprises a companion ladder body frame, and one is arranged at mobile lift mechanism and the electric cabinet on described companion ladder body frame;
Its feature is, described fan elevator also comprises that one is arranged at the mechanical overload protection device between described lift system and described companion ladder body frame; When the load of described fan elevator is more than or equal to default maximum load, described mechanical overload protection device is triggered, and by the output port of described mechanical overload protection device, energizing signal is transferred in described electric cabinet.
Preferably; described mechanical overload protection device comprises a trigger board, a limit switch and an elastic mechanism; described trigger board is fixed on the first end of described lift system; described limit switch is fixed on described companion ladder body frame; one end of described elastic mechanism is fixed on the first end of the described lift system of described trigger board below, and the other end of described elastic mechanism is fixed on the described companion ladder body frame near described limit switch place.
Preferably, described limit switch comprises a switch main body, a drive spindle and a drive spindle head, and described trigger board and described drive spindle head are in contact with one another; When the load of described fan elevator is more than or equal to maximum load, described trigger board is pushed into described drive spindle and the horizontal position of described switch main body one, and described limit switch is triggered.
Preferably, described elastic mechanism comprises a disk spring and an installation double-screw bolt, and described disk spring is sheathed on described installation double-screw bolt.
Preferably, one end of described installation double-screw bolt is through a bearing plate, and described bearing plate is fixed on the described companion ladder body frame near described limit switch place, and the other end of described installation double-screw bolt is welded on the first end of the described lift system of described trigger board below.
Preferably, described lift system comprises an adapter plate, and a gig being arranged on described adapter plate.
Preferably, on described companion ladder body frame, fix a pressing plate, described pressing plate is pushed down at least a portion of described adapter plate.
Preferably, described adapter plate below is provided with several rollers, makes described gig together with described adapter plate parallel motion.
In the present invention, above-mentioned optimum condition can combination in any on the basis that meets this area general knowledge, obtains each preferred embodiment of the present invention.
Positive progressive effect of the present invention is: the present invention arranges mechanical type overload protection device on fan elevator.It is large that its disk spring adopting has rigidity, and buffering vibration absorption ability is strong, has the characteristic of bearing large load with small deformation.By disk spring, convert magnitude of load to moving displacement value.By the relative displacement between gig and car, install limit switch additional again.When relative displacement reaches setting maxim, when suffered load has surpassed maximum load, trigger limit switch, with this, to electric cabinet, send overload signal.
Accompanying drawing explanation
Fig. 1 is the structural representation of preferred embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, provide preferred embodiment of the present invention, to describe technical scheme of the present invention in detail.
As shown in Figure 1, a kind of fan elevator with machine overload protection of the present invention mainly comprises that a companion ladder body frame 1, is arranged on the mobile lift mechanism on companion ladder body frame 1, an electric cabinet (not shown), and a mechanical overload protection device.Wherein, described mechanical overload protection device is arranged between described lift system and companion ladder body frame 1.
Preferably, described mechanical overload protection device comprises a trigger board 6, a limit switch 7 and an elastic mechanism.Wherein, trigger board 6 is fixed on to the first end of described lift system, limit switch 7 is fixed on companion ladder body frame 1, with 1 activity of companion ladder body frame.One end of described elastic mechanism is fixed on the first end of the described lift system of trigger board 6 belows, and the other end of described elastic mechanism is fixed on the companion ladder body frame 1 near limit switch 7 places.
Further, limit switch 7 comprises a switch main body, a drive spindle and a drive spindle head herein.Wherein, in described switch main body, there are built-in switch and built-in output port.Trigger board 6 is in contact with one another with described drive spindle head.Herein, trigger board 6 does not need to be fixedly connected with described drive spindle head, just contacts.
The triggering mode of limit switch 7 is: when described drive spindle and described switch main body be not during at a horizon, limit switch 7 is not triggered, and now the built-in switch in described switch main body is in closure state.The described drive spindle head of trigger board 6 compressing drives described drive spindle freely to rotate towards a direction, when described drive spindle head rotation arrives with described switch main body same level line, built-in switch in described switch main body disconnects, and the lead-out terminal in described switch main body is outwards exported energizing signal.
Described elastic mechanism comprises a disk spring 8 and an installation double-screw bolt 81, and disk spring 8 is sheathed on to be installed on double-screw bolt 81.Further, on the companion ladder body frame 1 near limit switch 7 places, a bearing plate 12 is set, one end of double-screw bolt 81 is installed through a bearing plate, and at this end nut of screwing on.The other end that double-screw bolt 81 is installed is welded on the first end of the described lift system of trigger board 6 belows.
Wherein, preferably, described lift system comprises an adapter plate 11 and a gig 4.The lower end of gig 4 is screwed on adapter plate 11, makes gig 4 with adapter plate 11 activities.In addition, on companion ladder body frame 1, fix a pressing plate 13, pressing plate 13 is pushed down at least a portion of adapter plate 11.Because pressing plate 13 is fixed on companion ladder body frame 1, so pressing plate 13, along with companion ladder body frame 1 moves, has also limited gig 4 and moved with whole fan elevator in vertical direction simultaneously.More preferably, the below of adapter plate 11 is provided with several rollers 14, and gig 4 can be moved freely in the horizontal direction together with adapter plate 11.
Whole fan elevator adopts a head-rope 3 and several head-rope track adjusting wheels 5 (being four head-rope track adjusting wheels 5 shown in figure) to form a companion ladder actuating mechanism.Wherein, head-rope 3, for the steel rope of carrying fan elevator all wt, is fixed on the upper end of head-rope 3 on fixed cross beam 2.The other end of head-rope 3 passes through each head-rope track adjusting wheel 5 successively, and the rotor of gig 4 inside, then holds derrick line 3 through outside fan elevator, and the lower end of head-rope 3 is fixed on a fixed end 9 the most at last.
It is as follows that the present invention has the working process of fan elevator of machine overload protection:
One, under described fan elevator normal operation, head-rope 3 is tightened.All wt is fixed and carried to described fan elevator by head-rope 3.Now, trigger board 6 contacts with the drive spindle head of limit switch 7, but does not trigger limit switch.
Under this state, because described fan elevator itself has deadweight, when therefore described fan elevator is unloaded, head-rope 3 gives described fan elevator the power F1 that makes progress identical with described fan elevator deadweight.Power F1 is transferred to the inside of gig 4 by each track adjusting wheel 5, have a tensile force f 2 to the right, pulls gig to move right, and moving displacement is made as S.
Like this, gig 4 drives whole adapter plate 11 to move right and oppresses disk spring 8.Keep balance to after disk spring 8 is compressed 4 one of gigs power F3 left, now the deflection of disk spring 8 is also S.
Two, in described fan elevator, load, when the heap(ed) capacity of described fan elevator does not surpass its maximum load.The power F1 that head-rope 3 upwards draws increases.The power F2 that gig 4 is subject to also increases, and the gig 4 displacement S that moves right increases.Meanwhile, disk spring 8 is further oppressed, and corresponding force F3 also increases, and with power F2 balance.When the moving displacement S of gig 4 increases, but still while being less than preset displacement amount S1, the drive spindle that trigger board 6 promotes limit switches 7 rotates backward, but does not forward to described switch main body on a horizon, so limit switch 7 does not trigger yet.
Three, when the heap(ed) capacity of described fan elevator surpasses its maximum load.Gig 4 moving displacement S to the right increases, and now moving displacement S is more than or equal to preset displacement amount S1.The drive spindle that trigger board 6 promotes limit switch 7 rotates backward, and when angle goes to 90 °, the drive spindle of limit switch 7 and switch main body are on same level line, thereby triggering limit switch 7 disconnects the built-in switch in limit switch 7.Described built-in output port is transferred to energizing signal in electric cabinet, and electric cabinet is controlled and sent system overload warning signal, and it is out of service to control described fan elevator.
Maximum load value that it should be noted that above-mentioned fan elevator can regulate by disk spring 8.The preferred slice-shaped of disk spring 8, is easy to form assembly set.With same disk spring 8, adopt different array modes, can make spring performance in very large range change, for example can adopt involutory, superimposed array mode, also can adopt compound different-thickness, the array mode of different sheet numbers etc.Wherein, while adopting superimposed array mode, with respect to same distortion, spring number more at most load is larger.
In the present embodiment, selected 15 groups (are not definite value, can adjust), disk spring 8 has been superimposed together.Disk spring 8 has can bear with small deformation the performance of large load.
In the time need to increasing the maximum load value of fan elevator, because the deflection S of disk spring 8 is fixed, need to increase the quantity of disk spring, make identical deflection can bear larger load.
In the time need to reducing the maximum load value of fan elevator, need to reduce the quantity of disk spring 8, the load that identical deflection is born diminishes.
Therefore, the present invention has avoided the defect of traditional thermal relay, can easily and accurately detect the load of fan elevator by mechanical overload protection device.Integral structure is simple, be convenient to install and reproducible the safety that has greatly improved fan elevator.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these are only casehistorys, protection scope of the present invention is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these embodiments, but these changes and modification all fall into protection scope of the present invention.
Claims (6)
1. a fan elevator with machine overload protection, described fan elevator comprises a companion ladder body frame, one is arranged at mobile lift mechanism and the electric cabinet on described companion ladder body frame;
It is characterized in that, described fan elevator also comprises that one is arranged at the mechanical overload protection device between described lift system and described companion ladder body frame; When the load of described fan elevator is more than or equal to default maximum load, described mechanical overload protection device is triggered, and by the output port of described mechanical overload protection device, energizing signal is transferred in described electric cabinet;
Described mechanical overload protection device comprises a trigger board, a limit switch and an elastic mechanism, described trigger board is fixed on the right-hand end of described lift system, described limit switch is fixed on described companion ladder body frame, one end of described elastic mechanism is fixed on the right-hand end of the described lift system of described trigger board below, and the other end of described elastic mechanism is fixed on the described companion ladder body frame near described limit switch place;
Described limit switch comprises a switch main body, a drive spindle and a drive spindle head, and described trigger board and described drive spindle head are in contact with one another; When the load of described fan elevator is more than or equal to maximum load, described trigger board is pushed into described drive spindle and the horizontal position of described switch main body one, and described limit switch is triggered.
2. the fan elevator with machine overload protection as claimed in claim 1, is characterized in that, described elastic mechanism comprises a disk spring and an installation double-screw bolt, and described disk spring is sheathed on described installation double-screw bolt.
3. the fan elevator with machine overload protection as claimed in claim 2; it is characterized in that; one end of described installation double-screw bolt is through a bearing plate; described bearing plate is fixed on the described companion ladder body frame near described limit switch place, and the other end of described installation double-screw bolt is welded on the right-hand end of the described lift system of described trigger board below.
4. the fan elevator with machine overload protection as described in claim 1-3 any one, is characterized in that, described lift system comprises an adapter plate, and a gig being arranged on described adapter plate.
5. the fan elevator with machine overload protection as claimed in claim 4, is characterized in that, on described companion ladder body frame, fixes a pressing plate, and described pressing plate is pushed down at least a portion of described adapter plate.
6. the fan elevator with machine overload protection as claimed in claim 4, is characterized in that, described adapter plate below is provided with several rollers, makes described gig together with described adapter plate parallel motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110377089.XA CN102424318B (en) | 2011-11-23 | 2011-11-23 | Fan elevator with mechanical overload protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110377089.XA CN102424318B (en) | 2011-11-23 | 2011-11-23 | Fan elevator with mechanical overload protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102424318A CN102424318A (en) | 2012-04-25 |
| CN102424318B true CN102424318B (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110377089.XA Expired - Fee Related CN102424318B (en) | 2011-11-23 | 2011-11-23 | Fan elevator with mechanical overload protection device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659007A (en) * | 2012-05-15 | 2012-09-12 | 南通瑞鑫电子电器有限公司 | Elevator car overload protection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2420254Y (en) * | 2000-05-11 | 2001-02-21 | 福建省第二建筑工程公司 | Overload limiter for wellhead lifter |
| JP3866622B2 (en) * | 2002-06-18 | 2007-01-10 | 三菱電機株式会社 | Seismic isolation elevator |
| CN201261671Y (en) * | 2008-06-17 | 2009-06-24 | 中际联合工业技术(北京)有限公司 | Tower barrel elevator |
| CN201343336Y (en) * | 2009-02-20 | 2009-11-11 | 中际联合工业技术(北京)有限公司 | Tower cylinder lifter |
| CN202007067U (en) * | 2010-08-24 | 2011-10-12 | 无锡市小天鹅建筑机械有限公司 | Load limiting device for hanging basket |
| CN202346535U (en) * | 2011-11-23 | 2012-07-25 | 上海东锐风电技术有限公司 | Fan elevator with mechanical overload protection |
-
2011
- 2011-11-23 CN CN201110377089.XA patent/CN102424318B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2420254Y (en) * | 2000-05-11 | 2001-02-21 | 福建省第二建筑工程公司 | Overload limiter for wellhead lifter |
| JP3866622B2 (en) * | 2002-06-18 | 2007-01-10 | 三菱電機株式会社 | Seismic isolation elevator |
| CN201261671Y (en) * | 2008-06-17 | 2009-06-24 | 中际联合工业技术(北京)有限公司 | Tower barrel elevator |
| CN201343336Y (en) * | 2009-02-20 | 2009-11-11 | 中际联合工业技术(北京)有限公司 | Tower cylinder lifter |
| CN202007067U (en) * | 2010-08-24 | 2011-10-12 | 无锡市小天鹅建筑机械有限公司 | Load limiting device for hanging basket |
| CN202346535U (en) * | 2011-11-23 | 2012-07-25 | 上海东锐风电技术有限公司 | Fan elevator with mechanical overload protection |
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| Publication number | Publication date |
|---|---|
| CN102424318A (en) | 2012-04-25 |
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