CN108557691A - A kind of anti-fall lifting gear and its anti-drop method - Google Patents
A kind of anti-fall lifting gear and its anti-drop method Download PDFInfo
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- CN108557691A CN108557691A CN201810433312.XA CN201810433312A CN108557691A CN 108557691 A CN108557691 A CN 108557691A CN 201810433312 A CN201810433312 A CN 201810433312A CN 108557691 A CN108557691 A CN 108557691A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000002045 lasting effect Effects 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 9
- BYACHAOCSIPLCM-UHFFFAOYSA-N 2-[2-[bis(2-hydroxyethyl)amino]ethyl-(2-hydroxyethyl)amino]ethanol Chemical compound OCCN(CCO)CCN(CCO)CCO BYACHAOCSIPLCM-UHFFFAOYSA-N 0.000 description 7
- 230000002265 prevention Effects 0.000 description 7
- 241001347978 Major minor Species 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010924 continuous production Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/12—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks
- B66F7/14—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by mechanical jacks screw operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
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- Life Sciences & Earth Sciences (AREA)
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- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a kind of anti-fall lifting gear and its anti-drop methods, belong to lifting gear technical field.The anti-fall lifting gear of the present invention, including rack, hoistable platform and actuating unit, further include double nut screw mechanism, the main nut and pair nut that the double nut screw mechanism includes lead screw and is socketed in successively on lead screw, wherein：The both ends of the lead screw are connect with actuating unit driven type, and the actuating unit is fixed on rack；The main nut is socketed on along outer wall on nut seat, and the nut seat is fixedly connected with hoistable platform；Preset clearance between the bottom end of the main nut and secondary nut can avoid pair nut load-bearing, main nut load-bearing, secondary nut not load-bearing.Present inventive concept is ingenious, solves the problems, such as that the screw body of lifting gear in the prior art has that load-bearing nut stripped thread occurs and is unable to quantity-produced.
Description
Technical field
The present invention relates to lifting gear technical fields, specifically, being related to a kind of anti-fall lifting gear and its anti-drop method.
Background technology
Lead screw in lifting gear is the basic transmission mechanism of conventional machinery equipment, load-bearing nut when being lifted on lead screw,
When due to long-term, overload operation or defective in quality product, often there is stripped thread problem in load-bearing nut, cause entire machinery or
Equipment downtime and be unable to continuous production, even, result in or cause safety accident sometimes.
Through retrieval, Chinese patent publication No. CN103993731 B, publication date 2015.12.09, denomination of invention：A kind of lead screw
Nut type building scaffold anti-fall device, including lead screw, nut, fall prevention frame and spring, the interior setting nut of the fall prevention frame are described
Spring is arranged in nut top, and the lead screw runs through fall prevention frame, nut and spring, and tooth form groove, institute is arranged in the nut upper surface
State the upper plate inner surface setting tooth form boss of fall prevention frame；It can be in fall prevention frame using the nut and lead screw of larger lead angle
The voluntarily lifting of retaining nut in lifting speed appropriate, and avoid locking, when the rate of climb is more than that nut institute is attainable
After maximal velocity, nut can limit scaffold rising, and after decrease speed reaches the safety value of nut setting, nut is then pressed
Contracting spring so that the tooth form groove of nut upper surface is matched with the tooth form boss of fall prevention frame upper plate inner wall, and then is realized anti-fall
Frame is locked, and scaffold is prevented to fall；The invention needs major thread lift angle, in addition, it is desirable to which fall prevention frame structure, is suitable for installation space
Big building field, versatility are poor.
Invention content
1. technical problems to be solved by the inivention
For overcome the problems, such as the screw body of lifting gear in the prior art there is stripped thread there are load-bearing nut and cannot be continuous
The problem of production, a kind of anti-fall lifting gear of present invention offer and its anti-drop method.The present invention passes through lifting gear pair nut
Setting after main nut forced-slip, can overlap one when occurring stripped thread failure between main nut and lead screw with secondary nut,
Secondary nut load-bearing is simultaneously mobile simultaneously, to reach quantity-produced purpose.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that：
A kind of anti-fall lifting gear, including rack, hoistable platform and actuating unit further include double nut screw mechanism, institute
Main nut and pair nut that double nut screw mechanism includes lead screw and is socketed in successively on lead screw are stated, wherein：The two of the lead screw
End is connect with actuating unit driven type, and the actuating unit is fixed on rack；The main nut is socketed on along outer wall on nut seat,
The nut seat is fixedly connected with hoistable platform；Preset clearance between the bottom end of the main nut and secondary nut can avoid pair spiral shell
Female load-bearing, main nut load-bearing, secondary nut not load-bearing；When stripped thread failure between main nut and lead screw, the main nut is by gravity
Sliding and secondary nut overlap joint one, and lift simultaneously, secondary nut load-bearing, main nut are unable to load-bearing due to stripped thread at this time, to
Realize load-bearing role transfer.
Further embodiment, actuating unit include top chock, shaft coupling, step and motor；The motor is fixed
It is connect with lead screw in upper rack crossbeam, and by shaft coupling, the top chock and step are individually fixed in rack
Portion and lower part, and be socketed with the both ends of lead screw, to realize the purpose continuously lifted.
Symmetrical card convex is arranged in the bottom end of further embodiment, main nut, can be one or more, the top of the pair nut
The card slot and chuck, card convex and chuck that end setting and card convex are correspondingly arranged simply overlap, it can be achieved that main nut before main nut stripped thread
It is lifted while with secondary nut.
Further scheme further includes the linear guide for being fixed on rack both sides；The both sides of the hoistable platform are fixed
There is sliding block, and be connected in the track slot of the linear guide by sliding block, to realize the purpose of hoistable platform orientation lifting；The card
It is provided with sliding equipment in the end of platform and/or card slot, can be steel ball, lubricating graphite gasket etc., to avoid main nut and pair
Nut role is stuck when shifting.
Further scheme, sliding equipment include the steel ball in the circular trough and circular trough of the end of chuck, the steel
The diameter of pearl is slightly larger than circular trough, and steel ball plays effective supporting role to the main nut of damage, moreover, load-bearing capacity is strong and can
It rolls and main nut is driven to be mutually shifted with secondary nut, occur after preventing main nut from directly being contacted with secondary nut stuck.
Further scheme, card convex, card slot and chuck are arc-shaped, be it is two or more, corresponding circular trough and
Steel ball is also two or more, and more, the engagement capability of the two is stronger, is less susceptible to stuck.
The upper end of further scheme, main nut is the fixed station prolonged to both sides symmetrical side, is pierced on the fixed station
There are mounting hole, convenient and hoistable platform to be detachably spirally connected.
Further scheme, frame upper end and lower end are respectively arranged with symmetrical upper limit platform and lower limit platform, avoid
It lifts offside.
Further scheme, secondary nut are two or more, and bottom end is also equipped with chuck, the chuck at secondary nut both ends
It is staggered.It can theoretically be continued for producing, it is only necessary to realize master-pair, major-minor-pair, major-minor pair-secondary, major-minor pair successively
It is secondary-secondary ... to wait the transfer of roles.
A kind of anti-drop method of anti-fall lifting gear, step are：
Step 1: putting：Weight is placed on hoistable platform；
Step 2: lifting：Start motor, hoistable platform with lead screw just then rise to specified altitude, motor pause,
Weight is shifted；Electric motor starting inverts, and hoistable platform drops to original position with the reversion of lead screw, then is placed in other weights, rises
During drop, main nut drives one lifting of secondary nut；
Step 3: secondary nut load-bearing：When stripped thread failure occurs in main nut, hoistable platform drives main nut to slide to secondary nut
Card slot in, with the lasting rotation of lead screw, main nut and secondary nut agree with, and secondary nut starts load-bearing, drive main nut together
Lifting.The process of main nut and secondary nut role transfer, and effectively anti-fall, easy to operate, wide application are realized, for example also may be used
Applied to elevator, scaffold etc..
3. advantageous effect
Compared with prior art, the present invention has following remarkable advantage：
(1) anti-fall lifting gear of the invention, is skillfully constructed, the main nut in dual or multi nut-screw mechanism and anti-fall spiral shell
It fixes without additional object between mother, is driven by screw thread and the object that agrees between the two, main nut is realized same with secondary nut overlap joint
Shi Yidong can realize the transfer of load-bearing when main nut stripped thread failure with secondary nut, be not necessarily to shutdown maintenance, and then reach lasting life again
The purpose of production；
(2) anti-fall lifting gear of the invention, main nut and secondary nut preset clearance, both avoid load-bearing simultaneously and may
It damages simultaneously；
(3) anti-fall lifting gear of the invention, card convex, card slot and chuck play the purpose of overlap joint engagement, and then realize master
It is moved while nut and secondary nut；
(4) anti-fall lifting gear of the invention, sliding equipment such as steel ball, lubricating graphite gasket can be achieved to avoid stuck
Purpose；
(5) anti-fall lifting gear of the invention, compared to the lubricating graphite gasket for walking lubricating action merely, circular trough and circle
Steel ball in shape slot, moreover it is possible to play the role of support, buffering load-bearing, and then realize the steady progress that role is transferred into；Main nut
After damage, main nut is fallen on secondary nut, is supported by steel ball, and main nut will appear the idle running of certain angle, then with pair
Nut operates after agreeing with secondary nut；
(6) anti-fall lifting gear of the invention, two or more card convexs, card slot, chuck circular trough and steel ball are more, and two
The engagement capability of person is stronger, is less susceptible to stuck；
(7) anti-fall lifting gear of the invention, fixed station and mounting hole can be conveniently detachably connected with load-bearing material；
(8) anti-fall lifting gear of the invention, lead screw are enhancing screw or ball-screw lead screw, versatile, can be applied
In extensive lifting device or turning facilities；
(9) anti-fall lifting gear of the invention, secondary nut can continuously be arranged, can theoretically be continued for producing, and only need
It to realize that master-pair, major-minor-pair, major-minor are secondary-secondary, major-minor is secondary-secondary ... successively and wait the transfer of roles；
(10) anti-drop method of the invention realizes the process of main nut and secondary nut role transfer, easy to operate, application
It is wide, production free of discontinuities, production efficiency and high degree of automation can be continued.
Description of the drawings
Fig. 1 is the anti-fall lifting gear stereogram of the present invention；
Fig. 2 is the anti-fall lifting gear front view of the present invention；
Fig. 3 is the main nut side view in the present invention；
Fig. 4 is the portions A enlarged drawing in Fig. 3；
Fig. 5 is the double nut screw mechanism explosive view in the present invention；
Fig. 6 is the double nut screw mechanism sectional view in this；
Fig. 7 is the main nut side view in the present invention；
Fig. 8 is the main nut sectional view in the present invention；
Fig. 9 is the main nut upward view in the present invention；
Figure 10 is the main nut stereogram in the present invention；
Figure 11 is the secondary nut side view in the present invention；
Figure 12 is the secondary nut vertical view in the present invention；
Figure 13 is the secondary nut sectional view in the present invention；
Figure 14 is the secondary nut stereogram in the present invention；
Figure 15 is the secondary nut side view of embodiment 9 to 10 in the present invention.
In figure：1. lead screw；2. main nut；3. steel ball；4. secondary nut；5. rack；6. weight；7. hoistable platform；8. power
Mechanism；9. the linear guide；21. fixed station；22. card convex；23. mounting hole；24. nut seat；41. card slot；42. chuck；51. the upper limit
Position platform；52. lower limit platform；71. locating slot；81. top chock；82. shaft coupling；83. step；84. motor.
Specific implementation mode
To further appreciate that present disclosure, this present invention is described in detail in conjunction with attached drawing.
Embodiment 1
The anti-fall lifting gear of the present embodiment, as shown in Figure 1,2,3, 4, including rack 5, hoistable platform 7 and actuating unit
8, which is characterized in that further include double nut screw mechanism, the double nut screw mechanism includes lead screw 1 and is socketed in lead screw successively
Main nut 2 on 1 and secondary nut 4, wherein：The both ends of the lead screw 1 are connect with 8 driven type of actuating unit, the actuating unit 8
It is fixed on rack 5；The main nut 2 is socketed on along outer wall on nut seat 24, and the nut seat 24 is fixed with hoistable platform 7 to be connected
It connects；Preset clearance between the bottom end of the main nut 2 and secondary nut 4 can avoid pair 4 load-bearing of nut, 2 load-bearing of main nut, secondary spiral shell
Female 4 not load-bearing；When stripped thread failure between main nut 2 and lead screw 1, the main nut 2 is overlapped one by gravity sliding and secondary nut 4
Body, and lift simultaneously, 4 load-bearing of secondary nut, main nut 2 are unable to load-bearing due to stripped thread at this time, to realize that load-bearing role shifts.
The anti-fall lifting gear of the present embodiment, in specifically used, actuating unit 8, such as motor, drive lead screw 1 to rotate, from
And hoistable platform 7 is driven to lift, and in normal lifting process, 2 load-bearing of main nut, the 4 not load-bearing of secondary nut；When main nut 2 and silk
Between bar 1 when stripped thread failure, the main nut 2 is influenced by the gravity of hoistable platform 7 and its weight 6 of carrying, downward along lead screw 1
Sliding agrees with one with secondary nut 4, and lifts simultaneously, and 4 load-bearing of secondary nut, main nut 2 are unable to load-bearing due to stripped thread at this time, from
And realize that load-bearing role shifts, and then achieve the purpose that continuous production, moreover, it is also possible to avoid work safety accident.
Embodiment 2
The anti-fall lifting gear of the present embodiment, basic structure are theed improvement is that with embodiment 1：As shown in Fig. 2, power
Mechanism 8 includes top chock 81, shaft coupling 82, step 83 and motor 84；The motor 84 is fixed on 5 upper lateral of rack
Beam, and being connect with lead screw 1 by shaft coupling 82, the top chock 81 and step 83 be individually fixed in 5 top of rack and
Lower part, and be socketed with the both ends of lead screw 1, to realize the purpose continuously lifted.
Embodiment 3
The anti-fall lifting gear of the present embodiment, basic structure the improvement is that the bottom end of main nut 2 is set with embodiment 2
Set symmetrical card convex 22, card convex 22 can be one or more, be 2 as shown in Fig. 5,7,8,9,10, in the present embodiment, as Fig. 5,
11, shown in 12,13,14, the card slot 41 and chuck 42 that the top of the pair nut 4 is arranged and card convex 22 is correspondingly arranged, are also 2
A, card convex 22 and chuck 42 simply overlap, and before 2 stripped thread of main nut, card convex 22 and chuck 42 overlap after slightly contacting, i.e.,
Main nut 2, which can be achieved, drives secondary nut 4 to be lifted with lead screw 1；After stripped thread failure between main nut 2 and lead screw 1, due to main spiral shell
Female 2 load-bearing and its own gravity is added, will be snapped down on secondary nut 4, main nut 2 dallies after certain angle, card convex 22 and chuck
42 completely attach to one, realize that secondary nut 4 drives main nut 2 to be lifted with lead screw 1, and then realize the transfer of load-bearing role,
It is achieved that not stopping for production and continuous production.
Embodiment 4
The anti-fall lifting gear of the present embodiment, basic structure thes improvement is that with embodiment 3,：As illustrated in fig. 1 and 2,
It further include the linear guide 9 for being fixed on 5 both sides of rack；The both sides of the hoistable platform 7 are fixed with sliding block, and are clamped by sliding block
In in the track slot of the linear guide 9, to realize the purpose of the orientation lifting of hoistable platform 7.
Embodiment 5
The anti-fall lifting gear of the present embodiment, basic structure are theed improvement is that with embodiment 4：The end of card convex 22 exists
Preset clearance 2mm between card slot 41；It is provided with sliding equipment in the end of chuck 42 and/or card slot 41, can be steel ball, lubrication
Graphite pad etc. is lubricating graphite gasket in the present embodiment, and setting in the end of chuck 42 and card slot 41 can be to avoid main nut
2 is stuck in card slot 41 with card convex 22 when the 4 role transfer of secondary nut.
The anti-drop method of the anti-fall lifting gear of the present embodiment, step are：
Step 1: putting：Weight 6 is placed on hoistable platform 7；
Step 2: lifting：Start motor 84, hoistable platform 7 with lead screw 1 just then rise to specified altitude, motor
84 pauses, weight is shifted；Motor 84 starts reversion, and hoistable platform 7 drops to original position with the reversion of lead screw 1, then is placed in
Other weights 6, in lifting process, main nut 2 drives 4 one lifting of secondary nut；
Step 3: secondary nut load-bearing：When stripped thread failure occurs in main nut 2, hoistable platform 7 drives main nut 2 to slide to pair
In the card slot 41 of nut 4, with the lasting rotation of lead screw 1, main nut 2 and secondary nut 4 agree with, and secondary nut 4 starts load-bearing, drives
2 one lifting of main nut.Realize the process of main nut and secondary nut role transfer, and effectively anti-fall, easy to operate, application surface
Extensively, for example can also be applied to elevator, scaffold etc..
Embodiment 6
The anti-fall lifting gear of the present embodiment, basic structure are theed improvement is that with embodiment 5：The end of card convex 22 exists
Preset clearance 3mm between card slot 41；The height of card convex 22 and chuck 42 is 2cm；Sliding equipment includes the circle of the end of chuck 42
The diameter of steel ball 3 in shape slot and circular trough, the steel ball 3 is slightly larger than circular trough, and steel ball 3 is embedded in the circular trough of 42 end of chuck
It is interior；Steel ball 3 plays effective supporting role to the main nut 2 of damage, moreover, load-bearing capacity is strong and can roll drive main nut 2
With secondary nut 4 mutually slide, sliding is improved to roll, it is significantly more efficient prevent main nut 2 from directly being contacted with secondary nut 4 after go out
It is existing stuck.
The anti-drop method of the anti-fall lifting gear of the present embodiment, step are：
Step 1: putting：Weight 6 is placed on hoistable platform 7；
Step 2: lifting：Start motor 84, hoistable platform 7 with lead screw 1 just then rise to specified altitude, motor
84 pauses, weight is shifted；Motor 84 starts reversion, and hoistable platform 7 drops to original position with the reversion of lead screw 1, then is placed in
Other weights 6, in lifting process, main nut 2 drives 4 one lifting of secondary nut；
Step 3: secondary nut load-bearing：When stripped thread failure occurs in main nut 2, hoistable platform 7 drives main nut 2 to slide to pair
In the card slot 41 of nut 4, with the lasting rotation of lead screw 1, main nut 2 is dallied with steel ball 3 after certain angle, main nut 2 and pair
Nut 4 agrees with again, and secondary nut 4 starts load-bearing, drives 2 one lifting of main nut.
Embodiment 7
The anti-fall lifting gear of the present embodiment, basic structure are theed improvement is that with embodiment 6：As shown in Fig. 9 and 12,
Card convex 22, card slot 41 and chuck 42 are arc-shaped, and it is two or more that radian, which is 60 °, and corresponding circular trough and steel ball 3 are also
It is two or more, it is 2 in the present embodiment.
In the step of anti-drop method of the anti-fall lifting gear of the present embodiment four：Main nut 2 is with the angle that steel ball 3 dallies
60°。
Embodiment 8
The anti-fall lifting gear of the present embodiment, basic structure are theed improvement is that with embodiment 7：The upper end of main nut 2 is
The fixed station 21 prolonged to both sides symmetrical side, piercing on the fixed station 21 has mounting hole 23, convenient and 7 detachable spiral shell of hoistable platform
It connects.
Embodiment 9
The anti-fall lifting gear of the present embodiment, basic structure are theed improvement is that with embodiment 8：As shown in Figure 1, rack 5
Upper end and lower end are respectively arranged with symmetrical upper limit platform 51 and lower limit platform 52, avoid lifting offside.The end of card convex 22 exists
Preset clearance 5mm between card slot 41；The height of card convex 22 and chuck 42 is 2cm；Secondary nut 4 is two or more, the present embodiment
It it is 2, as shown in figure 15, bottom end is identical with the bottom end structure of the main nut 2 to be also equipped with chuck 42,4 both ends of secondary nut
Chuck 42 be staggered；Chuck 42 and 22 quantity of card convex are 3, and radian is 30 °.
The anti-drop method of the anti-fall lifting gear of the present embodiment, step are：
Step 1: putting：Weight 6 is placed on hoistable platform 7；
Step 2: lifting：Start motor 84, hoistable platform 7 with lead screw 1 just then rise to specified altitude, motor
84 pauses, weight is shifted；Motor 84 starts reversion, and hoistable platform 7 drops to original position with the reversion of lead screw 1, then is placed in
Other weights 6, in lifting process, main nut 2 drives secondary nut 4 to be lifted between upper limit platform 51 and lower limit platform 52 together；
Step 3: the first secondary nut load-bearing：When stripped thread failure occurs in main nut 2, hoistable platform 7 drives main nut 2 to slide
To the card slot 41 of the first secondary nut 4, with the lasting rotation of lead screw 1, after 60 ° of the idle running of main nut 2, main nut 2 and the first pair
Nut 4 agrees with again, and the first secondary nut 4 starts load-bearing, drives 2 one lifting of main nut；
Step 4: the second secondary nut load-bearing：When stripped thread failure occur in main nut 2 and the first secondary nut 4, load-bearing material drives
Main nut 2 and the first secondary nut 4 slide to the card slot 41 of the second secondary nut 4, with the lasting rotation of lead screw 1, the first secondary spiral shell
After 4 60 ° of idle running of mother, 4 and second secondary nut 4 of the first secondary nut agrees with again, and the second secondary nut 4 starts load-bearing, drives main nut 2
With the first 4 one lifting of secondary nut.
Embodiment 10
The anti-fall lifting gear of the present embodiment, basic structure are theed improvement is that with embodiment 9：As shown in Figure 1, lifting
Platform 7 is flap-like, and level board puts weight 6, and riser top is provided with locating slot 71, and with the width phase of upper limit platform 51
It adapts to, and coordinates upper limit platform 51 to verify whether lifting is biased to.Secondary nut 4 be it is multiple, i.e., 3 or more, as shown in figure 15,
Bottom end is identical with the bottom end structure of the main nut 2 to be also equipped with chuck 42, and the chuck 42 at 4 both ends of secondary nut is staggered；Card
Platform 42 and 22 quantity of card convex are 3, and radian is 15 °.
The anti-fall lifting gear of the present embodiment can theoretically be continued for producing, it is only necessary to realize successively main-secondary, main
Secondary-secondary, major-minor pair-secondary, major-minor are secondary-secondary ... to wait the transfer of roles.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (10)
1. a kind of anti-fall lifting gear, including rack (5), hoistable platform (7) and actuating unit (8), which is characterized in that further include
Double nut screw mechanism, the double nut screw mechanism include lead screw (1) and the main nut (2) being socketed in successively on lead screw (1)
With secondary nut (4), wherein：
The both ends of the lead screw (1) are connect with actuating unit (8) driven type, and the actuating unit (8) is fixed on rack (5)；
The main nut (2) is socketed on along outer wall on nut seat (24), the nut seat (24) and the fixed company of hoistable platform (7)
It connects；Preset clearance between the bottom end of the main nut (2) and secondary nut (4)；
When stripped thread failure between main nut (2) and lead screw (1), the main nut (2) is overlapped by gravity sliding and secondary nut (4)
One, and lift simultaneously.
2. anti-fall lifting gear as described in claim 1, which is characterized in that the actuating unit (8) includes top chock
(81), shaft coupling (82), step (83) and motor (84)；The motor (84) is fixed on rack (5) upper beam, and leads to
It crosses shaft coupling (82) to connect with lead screw (1), the top chock (81) and step (83) are individually fixed in rack (5) top
And lower part, and be socketed with the both ends of lead screw (1).
3. anti-fall lifting gear as claimed in claim 2, which is characterized in that the bottom end setting of the main nut (2) is symmetrical
The card slot (41) and chuck (42) that card convex (22), the top setting of the pair nut (4) and card convex (22) are correspondingly arranged.
4. anti-fall lifting gear as claimed in claim 3, which is characterized in that further include the straight line for being fixed on rack (5) both sides
Guide rail (9)；The both sides of the hoistable platform (7) are fixed with sliding block, and are connected in the track slot of the linear guide (9) by sliding block；
It is provided with sliding equipment in the end of the chuck (42) and/or card slot (41).
5. a kind of anti-fall lifting gear as claimed in claim 4, which is characterized in that the sliding equipment includes chuck (42)
The diameter of steel ball (3) in the circular trough and circular trough of end, the steel ball (3) is slightly larger than circular trough.
6. a kind of anti-fall lifting gear as claimed in claim 5, which is characterized in that the card convex (22), card slot (41) and card
Platform (42) is arc-shaped, is two or more, corresponding circular trough and steel ball (3) are also two or more.
7. a kind of anti-fall lifting gear as claimed in claim 6, which is characterized in that the upper end of the main nut (2) is to two
The fixed station (21) that side symmetrical side prolongs, piercing on the fixed station (21) has mounting hole (23).
8. a kind of anti-fall lifting gear as described in claim 1 to 7 is any, which is characterized in that rack (5) upper end and under
End is respectively arranged with symmetrical upper limit platform (51) and lower limit platform (52).
9. a kind of anti-fall lifting gear as claimed in claim 8, which is characterized in that the pair nut (4) be it is two or more,
Its bottom end is also equipped with chuck (42), and the chuck (42) at secondary nut (4) both ends is staggered.
10. a kind of anti-drop method of anti-fall lifting gear, which is characterized in that step is：
Step 1: putting：Weight (6) is placed on hoistable platform (7)；
Step 2: lifting：Start motor (84), hoistable platform (7) with lead screw (1) just then rise to specified altitude, electricity
Machine (84) suspends, and weight is shifted；Motor (84) starts reversion, and hoistable platform (7) drops to original with the reversion of lead screw (1)
Position, then other weights (6) are placed in, in lifting process, main nut (2) drives (4) one lifting of secondary nut；
Step 3: secondary nut load-bearing：When stripped thread failure occurs in main nut (2), hoistable platform (7) drives main nut (2) to slide extremely
In the card slot (41) of secondary nut (4), with the lasting rotation of lead screw (1), main nut (2) and secondary nut (4) are agreed with, secondary nut
(4) start load-bearing, drive (2) one lifting of main nut.
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| CN111792558A (en) * | 2020-08-19 | 2020-10-20 | 北京中交华安科技有限公司 | Lifting equipment and application thereof |
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| CN108557691B (en) | 2023-12-19 |
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