CN107311060A - A kind of mechanical whole freight weight limit power-off protection apparatus and its ground jack of application - Google Patents
A kind of mechanical whole freight weight limit power-off protection apparatus and its ground jack of application Download PDFInfo
- Publication number
- CN107311060A CN107311060A CN201710757127.1A CN201710757127A CN107311060A CN 107311060 A CN107311060 A CN 107311060A CN 201710757127 A CN201710757127 A CN 201710757127A CN 107311060 A CN107311060 A CN 107311060A
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- China
- Prior art keywords
- mobile jib
- weight limit
- freight weight
- small lever
- secondary bar
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
- B66D1/56—Adaptations of limit switches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/50—Applications of limit circuits or of limit-switch arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
- B66D1/58—Safety gear responsive to excess of load
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Jib Cranes (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention discloses a kind of mechanical whole freight weight limit power-off protection apparatus, including mobile jib, the front end grafting lifting small lever of the mobile jib, the rear end of the small lever is connected on mobile jib by connecting bolt, protective case is provided with below the small lever, the protective case is interspersed on mobile jib and is fixedly connected with mobile jib, the upper end of the protective case keeps spacing with small lever, lower end is fixedly connected with nut, freight weight limit spring is placed in protective case, regulating bolt is cased with the nut, the freight weight limit spring one end is abutted with small lever lower surface, the other end is abutted with the screw tip of regulating bolt；The mobile jib is provided with travel switch, and the cursor of the travel switch is connected to the front end of small lever.The present invention has the advantages that the whole hoisting weight of goods can be adjusted, carries out machine overload protection and Electronic control overload protection dual safety to motor.
Description
Technical field
The invention belongs to lift field outside superaltitude room, and in particular to a kind of mechanical whole freight weight limit power-off protection apparatus and
Its ground jack applied.
Background technology
As China's modernization development is more and more faster, urban construction skyscraper is more and more, twenty or thirty floor in city
High building is seen everywhere.The operation such as outdoor high-rise working such as decoration industry, air-conditioning installing/dismounting, the installation of anti-theft net push wave now is most
Scabrous is exactly upper air installing, and outdoor over height stacking operation Hoisting Security risk is big, and the visual field is failed to understand.Lift by crane nearly hundred meters of twenty or thirty building
Superelevation null process, which easily hooks to touch outdoor objects and cause lifting process steel wire to be broken etc., causes annual accident to occur again and again.
In upper air installing industry, we find the patent No. 201621330936.1, utility model title：A kind of simple lifting
Device, discloses a kind of simple ground jack, the main prypole of the simple ground jack（4）The body of rod in provided with can from manipulatable end extract out matching somebody with somebody
Weight bar（7）, weight linear meter（7）Two ends are provided with banking stop（701）, gag lever post is additionally provided with the manipulatable end（401）, the gag lever post
（401）Position be higher than weight linear meter（7）, and less than banking stop（701）Top margin；Work as weight linear meter（7）After extraction, the gag lever post
（401）By weight linear meter（7）The banking stop of non-withdrawal end（701）Clamping.The utility model small volume, be easy to carry, operating efficiency
It is high, save manpower, using simple and suitable for skyscraper.But the ground jack is in the process risen using motorized motions
In, if occur the situation that goods midway is stuck or goods is overweight, easily cause motor overload；Meanwhile, the ground jack
Secondary bar afterbody is only a piece of banking stop, it is impossible to keep the balance of whole device, drive device center of gravity is in pole when causing to use
Top, is moved after anterior support piece fixing point, and center of gravity falls, and there is hidden danger.At present on the market without a kind of whole lifting overload
Monitor the device of protection.
The content of the invention
The purpose of the present invention, which solves above-mentioned technical problem, can adjust the whole hoisting weight of goods there is provided one kind, motor is entered
Row machine overload protection and the mechanical whole freight weight limit power-off protection apparatus of Electronic control overload protection dual safety and its application
Ground jack.
To realize above-mentioned purpose, the technical scheme is that：
A kind of mechanical whole freight weight limit power-off protection apparatus, including mobile jib, the front end grafting lifting small lever of the mobile jib, institute
The rear end for stating small lever is connected on mobile jib by connecting bolt, and protective case is provided with below the small lever, and the protective case interts
It is fixedly connected on mobile jib and with mobile jib, upper end and the small lever of the protective case keep spacing, and lower end is fixedly connected with nut,
Placed in protective case in freight weight limit spring, the nut and be cased with regulating bolt, the freight weight limit spring one end is supported with small lever lower surface
Connect, the other end is abutted with the screw tip of regulating bolt；The mobile jib is provided with travel switch, the cursor of the travel switch
The front end of small lever is connected to, the travel switch is electrically connected with the drive device of lifting appliance.
As further technical scheme, freight weight limit spring described above is connected to away from the 1/3-1/2 of small lever front end.
As further technical scheme, the upper end of protective case described above and the spacing of small lever are 3-15mm.
A kind of ground jack, including mechanical whole freight weight limit power-off protection apparatus as mentioned, break in mechanical whole freight weight limit
The small lever front end of electrical protective device sets and is provided with suspension hook below guider, the guider；Mechanical whole process freight weight limit breaks
The mobile jib rear end of electrical protective device is provided with fixed mount, and fixed mount is provided with drive device, and one end of the suspension hook and lifting rope is connected,
The other end of lifting rope bypasses guider and is connected with drive device, and the lower section of the mobile jib is provided with support meanss, the support dress
Put the length away from mobile jib front end accounts for mobile jib length 1/（3-4）；The travel switch of mechanical whole process freight weight limit power-off protection apparatus with
The rising driving part series connection of the drive device.
As further technical scheme, drive device described above includes reel, motor and motor remote control switch, described
Motor remote control switch and motor electrical connection, the motor and reel are all arranged on fixed mount, and the other end of the lifting rope is bypassed
Guider is connected with reel, the power output connection of the reel and motor, the travel switch and motor remote control switch
Lifting key is connected.
As further technical scheme, fan is additionally provided with above motor described above, the fan is arranged on fixed mount
On.
As further technical scheme, Current Display and voltage display, institute are additionally provided with fixed mount described above
State Current Display and voltage display is electrically connected with motor.
As further technical scheme, fixed mount bottom described above is provided with road wheel.
As further technical scheme, provided with the secondary bar that can be extracted out from mobile jib rear end, the pair in mobile jib described above
Bar includes the secondary bar body of rod, and the front end of the secondary bar body of rod is provided with secondary bar stop tab in mobile jib in secondary bar lever front end, described
Mobile jib rear end is provided with the gear-stopping bar for backstop secondary bar stop tab；The rear end of the secondary bar body of rod is outside mobile jib, in secondary bar bar
The rear end of body is provided with the secondary bar balancing pole for being used for keeping drive device left-right balance.
As further technical scheme, support meanss described above are made up of the support chip of two pieces of rectangular bendings,
The lower surface connection of the outer surface of support chip one and mobile jib, the spacing of two pieces of support chips is 10-12cm；The guider is
Directive wheel.
In the present invention, it is 1.5-2.5m that mobile jib total length is optimal.Optimal counterweight pole length is 1.5-2.5m.Support meanss
Length away from mobile jib front end accounts for the 1/ of mobile jib length（3-4）, stress minimum 1 during lifting:3, maximum 1:8；The former increases equivalent to every
Plus 10kg counterweights, 30kg can be increased and play weight, the latter can increase 80kg and play weight equivalent to every increase 10kg.
Compared with prior art, beneficial effects of the present invention are：
1st, the present invention can adjust goods hoisting weight.
Mechanical whole freight weight limit power-off protection apparatus of the invention moves up and down to adjust freight weight limit spring using regulating bolt
Decrement, causes small lever to drive termination travel switch by spring-compressed displacement certain angle by the change of decrement（Limit
Bit switch）Action, if regulating bolt turns downwards, the initial compression amount of freight weight limit spring is small（That is freight weight limit spring is more loose）, then small thick stick
The affordable lift heavy amount of bar is just small；If regulating bolt turns upwards, the initial compression amount of freight weight limit spring is big（I.e. freight weight limit spring compared with
Tightly）, then the affordable lift heavy amount of small lever is just big.
2nd, the present invention can carry out overload protection to motor.
Mechanical whole freight weight limit power-off protection apparatus of the invention can set the initial compression of freight weight limit spring according to lifting capacity
Amount, it is assumed that when loop wheel machine set lifting capacity as 100kg, actual use lifting amount be 50KG, within this range, freight weight limit spring it is original
State is enough to support small lever to be lifted by crane.When in lifting process.Cause lifting object to hook due to colliding with causes lifting to foreign matter
Increase >=100KG is measured, freight weight limit camber of spring compression, small lever front end can be pulled down, and trigger travel switch, and motor rises power-off,
Then only carry out step-down operation and release lifting position-limit, realize whole overload protection function.The ground jack of the present invention can also pass through
The electric current and voltage and changed power of motor are observed, to understand the situation of lifting, power-off protection manually can be carried out to motor.Compare
Traditional crane, the mechanical whole freight weight limit power-off protection apparatus of the present invention has full safety overload protection function, solves
The drawbacks of conventional hoist only reaches upper limit ability overload protection.Realize that whole lifting is more safe and efficient.Have a wide range of application
It is general.
3rd, ground jack of the present invention is simple in construction, easy to use, safer.
Ground jack of the present invention uses lever principle, using support meanss as fulcrum, and drive device is installed on fixed mount and is made
For the first counterweight, kill two birds with one stone, that is, realize the lifting operation to lifting goods, counterweight is realized again, structure is simplified.Together
When, in order to be able to lift more heavy weight goods, the present invention has also added weight linear meter in mobile jib, when goods is overweight, will can matched somebody with somebody
Weight bar is extracted out out of main prypole, is used as the second counterweight.The present invention is provided with the rear end of the secondary bar body of rod to be used to keep single unit system
The secondary bar balancing pole of left-right balance, after moving anterior support piece fixing point and causing mass centre changing, can also be protected by secondary bar balancing pole
The balance of single unit system is held, will not be toppled over, it is ensured that the safety of hoisting process.
4th, operating efficiency of the present invention is high.
Ground jack of the present invention uses lever principle, with 20-30kg deadweight, rises and slings goods of more than 3 times higher than deadweight,
Compared to other ground jacks, beneficial to carrying into skyscraper elevator, and less mass is only needed to, realize lifting operating efficiency
It is higher.
5th, present invention design is reasonably distributed, and floor space is small, is convenient for carrying.
Ground jack of the present invention is using support meanss as fulcrum, and weight linear meter is closed in main prypole so that counterweight more reasonably increases
Plus, and rod-like structure floor space is smaller, is easily accessible elevator, and road wheel is additionally provided with below fixed mount, is moved easily and takes
Band.
6th, the present invention is more suitable for the lifting of skyscraper.
The support meanss and counterweight of ground jack of the present invention directly need not be filled the present invention by support on same plane
Put and be connected to window side, drive device is put in ground, support meanss are made up of the support chip of two pieces of rectangular bendings, cocker
It is connected on the exterior wall on window side and either inner wall or directly lives windowsill by two pieces of stop tabs, can be flexible in actual operation
Adjustment, can more tackle the situation that various liftings occur.
7th, the present invention saves manpower.
Because current many upper air installings are all to pull installation by manpower, dangerous big, human cost is high, related personnel's labor
Fatigue resistance is big, by using the present invention, only needs two to three people to be that can easily complete lifting operation.Ensure safety, subtract again
Few manual labor's intensity.
Brief description of the drawings
Fig. 1 is the structural representation of the mechanical whole freight weight limit power-off protection apparatus of the present invention；
Fig. 2 is the internal structure schematic diagram of the mechanical whole freight weight limit power-off protection apparatus of the present invention；
Fig. 3 is the positive structure schematic of ground jack of the present invention；
Fig. 4 is the structure schematic diagram of ground jack of the present invention；
Fig. 5 is ground jack front end of the present invention mplifying structure schematic diagram；
Fig. 6 is the structural representation of secondary bar of the present invention；
Fig. 7 is the top view of Fig. 6 secondary bars.
Reference：1- small levers, 2- travel switches, 3- mobile jibs, 31- connecting bolts, 32- gear-stopping bars, 4- nuts, 5- is adjusted
Section bolt, 6- protective cases, 7- freight weight limit springs, 8- support meanss, 9- suspension hooks, 10- guiders, 11- lifting ropes, 12- drive devices,
121- fans, 122- voltage displays, 123- Current Displays, 124- motor remote control switches, 125- fixed mounts, 126- motors,
127- reels, 57- motors, 13- road wheels, 14- secondary bars, 141- secondary bar balancing poles, the 142- secondary bar bodies of rod, 143- secondary bar backstops
Piece.
Embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to
The scope that embodiment is represented.
Embodiment 1：
As shown in Figure 1-2, a kind of mechanical whole freight weight limit power-off protection apparatus, including mobile jib 3, the front end grafting lifting of mobile jib 3
With small lever 1, the rear end of small lever 1 is connected on mobile jib 3 by connecting bolt 31, and the lower section of small lever 1 is provided with protective case 6, protection
Set 6 is interspersed on mobile jib 3 and is fixedly connected with mobile jib 3, and upper end and the small lever 1 of protective case 6 keep spacing, lower end and nut 4
It is fixedly connected, is placed in protective case 6 and regulating bolt 5 is cased with freight weight limit spring 7, nut 4, under the one end of freight weight limit spring 7 and small lever 1
Surface is abutted, and the other end is abutted with the screw tip of regulating bolt 5；Mobile jib 3 is provided with travel switch 2, the rotation of travel switch 2
Arm is connected to the front end of small lever 1.Freight weight limit spring 7 is connected to away from the front end 1/3 of small lever 1.The upper end of protective case 6 and small lever
1 spacing is 3mm.
Embodiment 2：
As shown in Figure 1-2, a kind of mechanical whole freight weight limit power-off protection apparatus, including mobile jib 3, the front end grafting lifting of mobile jib 3
With small lever 1, the rear end of small lever 1 is connected on mobile jib 3 by connecting bolt 31, and the lower section of small lever 1 is provided with protective case 6, protection
Set 6 is interspersed on mobile jib 3 and is fixedly connected with mobile jib 3, and upper end and the small lever 1 of protective case 6 keep spacing, lower end and nut 4
It is fixedly connected, is placed in protective case 6 and regulating bolt 5 is cased with freight weight limit spring 7, nut 4, under the one end of freight weight limit spring 7 and small lever 1
Surface is abutted, and the other end is abutted with the screw tip of regulating bolt 5；Mobile jib 3 is provided with travel switch 2, the rotation of travel switch 2
Arm is connected to the front end of small lever 1.Freight weight limit spring 7 is connected to away from the front end 1/2.5 of small lever 1.The upper end of protective case 6 and little Gang
The spacing of bar 1 is 10mm.
Embodiment 3：
As shown in Figure 1-2, a kind of mechanical whole freight weight limit power-off protection apparatus, including mobile jib 3, the front end grafting lifting of mobile jib 3
With small lever 1, the rear end of small lever 1 is connected on mobile jib 3 by connecting bolt 31, and the lower section of small lever 1 is provided with protective case 6, protection
Set 6 is interspersed on mobile jib 3 and is fixedly connected with mobile jib 3, and upper end and the small lever 1 of protective case 6 keep spacing, lower end and nut 4
It is fixedly connected, is placed in protective case 6 and regulating bolt 5 is cased with freight weight limit spring 7, nut 4, under the one end of freight weight limit spring 7 and small lever 1
Surface is abutted, and the other end is abutted with the screw tip of regulating bolt 5；Mobile jib 3 is provided with travel switch 2, the rotation of travel switch 2
Arm is connected to the front end of small lever 1.Freight weight limit spring 7 is connected to away from the front end 1/2 of small lever 1.The upper end of protective case 6 and small lever
1 spacing is 15mm.
Embodiment 4：
As shown in fig. 3 to 7, a kind of ground jack, includes the mechanical whole freight weight limit power-off protection apparatus of embodiment 1, mechanical
The front end of small lever 1 of whole freight weight limit power-off protection apparatus sets guider 10, and the lower section of guider 10 is provided with suspension hook 9；Machinery
The rear end of mobile jib 3 of formula whole process freight weight limit power-off protection apparatus is provided with fixed mount 125, and fixed mount 125 is provided with drive device 12, suspension hook
9 are connected with one end of lifting rope 11, and the other end of lifting rope 11 bypasses guider 10 and is connected with drive device 12, the lower section of mobile jib 3
Provided with support meanss 8, length of the support meanss 8 away from the front end of mobile jib 3 accounts for the 1/3 of the length of mobile jib 3；Mechanical whole process freight weight limit power-off is protected
The travel switch 2 of protection unit is connected with the rising driving part of drive device 12.Drive device 12 includes reel 127, motor 126
With motor remote control switch 124, motor remote control switch 124 and motor 126 are electrically connected, and motor 126 and reel 127 are all arranged on and fixed
On frame 125, the other end of lifting rope 11 bypasses guider 10 and is connected with reel 127, the power output of reel 127 and motor 126
Connection, travel switch 2 is connected with the lifting key of motor remote control switch 124.The top of motor 126 is additionally provided with fan 121, fan 121
On fixed mount 125.Current Display 123 and voltage display 122, Current Display 123 are additionally provided with fixed mount 125
Electrically connected with voltage display 122 with motor 126.The bottom of fixed mount 125 is provided with road wheel 13.Being provided with mobile jib 3 can be from mobile jib 3
The secondary bar 14 that rear end is extracted out, secondary bar 14 includes the secondary bar body of rod 142, and the front end of the secondary bar body of rod 142 is in mobile jib 3, in secondary bar bar
The front end of body 142 is provided with secondary bar stop tab 143, and the rear end of mobile jib 3 is provided with the gear-stopping bar 32 for backstop secondary bar stop tab 143；Secondary bar
The rear end of the body of rod 142 is outside mobile jib 3, and being provided with the rear end of the secondary bar body of rod 142 is used to keep the left-right balance of drive device 12
Secondary bar balancing pole 141.Support meanss 8 are made up of the support chip of two pieces of rectangular bendings, the outer surface of support chip one and mobile jib 3
Lower surface is connected, and the spacing of two pieces of support chips is 10cm；Guider 10 is directive wheel.
Embodiment 5：
As shown in fig. 3 to 7, a kind of ground jack, includes the mechanical whole freight weight limit power-off protection apparatus of embodiment 2, mechanical
The front end of small lever 1 of whole freight weight limit power-off protection apparatus sets guider 10, and the lower section of guider 10 is provided with suspension hook 9；Machinery
The rear end of mobile jib 3 of formula whole process freight weight limit power-off protection apparatus is provided with fixed mount 125, and fixed mount 125 is provided with drive device 12, suspension hook
9 are connected with one end of lifting rope 11, and the other end of lifting rope 11 bypasses guider 10 and is connected with drive device 12, the lower section of mobile jib 3
Provided with support meanss 8, length of the support meanss 8 away from the front end of mobile jib 3 accounts for the 1/4 of the length of mobile jib 3；Mechanical whole process freight weight limit power-off is protected
The travel switch 2 of protection unit is connected with the rising driving part of drive device 12.Drive device 12 includes reel 127, motor 126
With motor remote control switch 124, motor remote control switch 124 and motor 126 are electrically connected, and motor 126 and reel 127 are all arranged on and fixed
On frame 125, the other end of lifting rope 11 bypasses guider 10 and is connected with reel 127, the power output of reel 127 and motor 126
Connection, travel switch 2 is connected with the lifting key of motor remote control switch 124.The top of motor 126 is additionally provided with fan 121, fan 121
On fixed mount 125.Current Display 123 and voltage display 122, Current Display 123 are additionally provided with fixed mount 125
Electrically connected with voltage display 122 with motor 126.The bottom of fixed mount 125 is provided with road wheel 13.Being provided with mobile jib 3 can be from mobile jib 3
The secondary bar 14 that rear end is extracted out, secondary bar 14 includes the secondary bar body of rod 142, and the front end of the secondary bar body of rod 142 is in mobile jib 3, in secondary bar bar
The front end of body 142 is provided with secondary bar stop tab 143, and the rear end of mobile jib 3 is provided with the gear-stopping bar 32 for backstop secondary bar stop tab 143；Secondary bar
The rear end of the body of rod 142 is outside mobile jib 3, and being provided with the rear end of the secondary bar body of rod 142 is used to keep the left-right balance of drive device 12
Secondary bar balancing pole 141.Support meanss 8 are made up of the support chip of two pieces of rectangular bendings, the outer surface of support chip one and mobile jib 3
Lower surface is connected, and the spacing of two pieces of support chips is 11cm；Guider 10 is directive wheel.
Embodiment 6：
As shown in fig. 3 to 7, a kind of ground jack, includes the mechanical whole freight weight limit power-off protection apparatus of embodiment 3, mechanical
The front end of small lever 1 of whole freight weight limit power-off protection apparatus sets guider 10, and the lower section of guider 10 is provided with suspension hook 9；Machinery
The rear end of mobile jib 3 of formula whole process freight weight limit power-off protection apparatus is provided with fixed mount 125, and fixed mount 125 is provided with drive device 12, suspension hook
9 are connected with one end of lifting rope 11, and the other end of lifting rope 11 bypasses guider 10 and is connected with drive device 12, the lower section of mobile jib 3
Provided with support meanss 8, length of the support meanss 8 away from the front end of mobile jib 3 accounts for the 1/4 of the length of mobile jib 3；Mechanical whole process freight weight limit power-off is protected
The travel switch 2 of protection unit is connected with the rising driving part of drive device 12.Drive device 12 includes reel 127, motor 126
With motor remote control switch 124, motor remote control switch 124 and motor 126 are electrically connected, and motor 126 and reel 127 are all arranged on and fixed
On frame 125, the other end of lifting rope 11 bypasses guider 10 and is connected with reel 127, the power output of reel 127 and motor 126
Connection, travel switch 2 is connected with the lifting key of motor remote control switch 124.The top of motor 126 is additionally provided with fan 121, fan 121
On fixed mount 125.Current Display 123 and voltage display 122, Current Display 123 are additionally provided with fixed mount 125
Electrically connected with voltage display 122 with motor 126.The bottom of fixed mount 125 is provided with road wheel 13.Being provided with mobile jib 3 can be from mobile jib 3
The secondary bar 14 that rear end is extracted out, secondary bar 14 includes the secondary bar body of rod 142, and the front end of the secondary bar body of rod 142 is in mobile jib 3, in secondary bar bar
The front end of body 142 is provided with secondary bar stop tab 143, and the rear end of mobile jib 3 is provided with the gear-stopping bar 32 for backstop secondary bar stop tab 143；Secondary bar
The rear end of the body of rod 142 is outside mobile jib 3, and being provided with the rear end of the secondary bar body of rod 142 is used to keep the left-right balance of drive device 12
Secondary bar balancing pole 141.Support meanss 8 are made up of the support chip of two pieces of rectangular bendings, the outer surface of support chip one and mobile jib 3
Lower surface is connected, and the spacing of two pieces of support chips is 12cm；Guider 10 is directive wheel.
In use, regulating the initial compression amount of freight weight limit spring 7 with regulating bolt 5, support meanss 8 are then stuck in window side
On the outer wall or inwall or windowsill of wall, drive device 12 is placed on the ground, keeps overall by secondary bar balancing pole 141
Balance, starts the decline key of motor remote control switch 124 and puts down suspension hook 9, suspension hook 9 catches on goods, starts on motor remote control switch 124
Key is risen, goods is lifted；When the heavy burden of drive device 12 is not enough to lifting cargo, secondary bar 14 is extracted out from the rear end of mobile jib 3, its
On non-withdrawal end clamping gear-stopping bar 32, the connection of mobile jib 3 and secondary bar 14 is kept；When goods is overweight or is being stuck in midair,
Freight weight limit spring 7 is further compressed, and small lever 1 pushes triggering travel switch 2, and motor 126 rises power-off, then only carried out
Step-down operation releases lifting position-limit, realizes whole overload protection function.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " preceding ", "
Afterwards ", the orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer "
For based on orientation shown in the drawings or position relationship, be for only for ease of description the present invention and simplify description, rather than indicate or
Specific orientation must be had, with specific azimuth configuration and operation by implying the device or element of meaning, therefore it is not intended that
Limiting the scope of the invention.
It is last it is to be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
The present invention is described in detail with reference to the foregoing embodiments for pipe, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from the essence of various embodiments of the present invention technical scheme
God and scope.
Claims (10)
1. a kind of mechanical whole freight weight limit power-off protection apparatus, including mobile jib（3）, it is characterised in that：The mobile jib（3）Front end
Grafting lifting small lever（1）, the small lever（1）Rear end by connecting bolt（31）It is connected to mobile jib（3）On, the small thick stick
Bar（1）Lower section is provided with protective case（6）, the protective case（6）It is interspersed in mobile jib（3）Upper and and mobile jib（3）It is fixedly connected, it is described to protect
Sheath（6）Upper end and small lever（1）Keep spacing, lower end and nut（4）It is fixedly connected, protective case（6）Interior placement freight weight limit bullet
Spring（7）, the nut（4）Inside it is cased with regulating bolt（5）, the freight weight limit spring（7）One end and small lever（1）Lower surface is abutted,
The other end and regulating bolt（5）Screw tip abut；The mobile jib（3）It is provided with travel switch（2）, the travel switch
（2）Cursor be connected to small lever（1）Front end.
2. mechanical whole freight weight limit power-off protection apparatus according to claim 1, it is characterised in that：The freight weight limit spring
（7）It is connected to away from small lever（1）At the 1/3-1/2 of front end.
3. mechanical whole freight weight limit power-off protection apparatus according to claim 1, it is characterised in that：The protective case（6）
Upper end and small lever（1）Spacing be 3-15mm.
4. a kind of ground jack, it is characterised in that：Including the mechanical whole freight weight limit power-off as any one of claim 1-3
Protection device, in the small lever of mechanical whole freight weight limit power-off protection apparatus（1）Front end sets guider（10）, it is described to be oriented to
Device（10）Lower section is provided with suspension hook（9）；The mobile jib of mechanical whole process freight weight limit power-off protection apparatus（3）Rear end is provided with fixed mount
（125）, fixed mount（125）It is provided with drive device（12）, the suspension hook（9）With lifting rope（11）One end connection, lifting rope（11）
The other end bypass guider（10）With drive device（12）Connection, the mobile jib（3）Lower section be provided with support meanss（8）,
The support meanss（8）Away from mobile jib（3）The length of front end accounts for mobile jib（3）The 1/ of length（3-4）；Mechanical whole process freight weight limit power-off is protected
The travel switch of protection unit（2）With the drive device（12）Rising driving part series connection.
5. ground jack according to claim 4, it is characterised in that：The drive device（12）Including reel（127）, motor
（126）With motor remote control switch（124）, the motor remote control switch（124）And motor（126）Electrical connection, the motor（126）
And reel（127）All it is arranged on fixed mount（125）On, the lifting rope（11）The other end bypass guider（10）With reel
（127）Connection, the reel（127）With motor（126）Power output connection, the travel switch（2）Opened with motor remote control
Close（124）Lifting key series connection.
6. ground jack according to claim 5, it is characterised in that：The motor（126）Top is additionally provided with fan（121）,
The fan（121）Installed in fixed mount（125）On.
7. ground jack according to claim 5, it is characterised in that：The fixed mount（125）On be additionally provided with Current Display
（123）And voltage display（122）, the Current Display（123）And voltage display（122）With motor（126）Electrical connection.
8. ground jack according to claim 4, it is characterised in that：The fixed mount（125）Bottom is provided with road wheel（13）.
9. ground jack according to claim 4, it is characterised in that：The mobile jib（3）Interior be provided with can be from mobile jib（3）Take out rear end
The secondary bar gone out（14）, the secondary bar（14）Including the secondary bar body of rod（142）, the secondary bar body of rod（142）Front end be located at mobile jib（3）
It is interior, in the secondary bar body of rod（142）Front end is provided with secondary bar stop tab（143）, the mobile jib（3）Rear end, which is provided with, is used for backstop secondary bar backstop
Piece（143）Gear-stopping bar（32）；The secondary bar body of rod（142）Rear end be located at mobile jib（3）Outside, in the secondary bar body of rod（142）After
End, which is provided with, to be used to keep drive device（12）The secondary bar balancing pole of left-right balance（141）.
10. ground jack according to claim 4, it is characterised in that：The support meanss（8）By two pieces of rectangular bendings
Support chip composition, the outer surface of support chip one and mobile jib（3）Lower surface connection, the spacing of two pieces of support chips is 10-
12cm；The guider（10）For directive wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710757127.1A CN107311060B (en) | 2017-08-29 | 2017-08-29 | Mechanical whole-course weight-limiting power-off protection device and jack applied by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710757127.1A CN107311060B (en) | 2017-08-29 | 2017-08-29 | Mechanical whole-course weight-limiting power-off protection device and jack applied by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107311060A true CN107311060A (en) | 2017-11-03 |
| CN107311060B CN107311060B (en) | 2023-03-21 |
Family
ID=60176882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710757127.1A Active CN107311060B (en) | 2017-08-29 | 2017-08-29 | Mechanical whole-course weight-limiting power-off protection device and jack applied by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107311060B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117383441A (en) * | 2023-12-07 | 2024-01-12 | 山西机电职业技术学院 | Overload self-protection crane |
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| GB2156763A (en) * | 1984-03-31 | 1985-10-16 | Penny Hydraulics Limited | Motorised winch or crane with load setting arrangement |
| CN201334334Y (en) * | 2009-01-22 | 2009-10-28 | 中国化学工程第三建设有限公司 | Hoisting machine with overload protection function |
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| CN204917702U (en) * | 2015-09-06 | 2015-12-30 | 河南中机华远机械工程有限公司 | Take self preservation to protect driving of device |
| CN106276660A (en) * | 2016-08-24 | 2017-01-04 | 德马科起重机械有限公司 | A kind of crashproof stopping means of electric block |
| CN206014294U (en) * | 2016-09-21 | 2017-03-15 | 浙江永天机电制造有限公司 | Landing power-off and the double speed crane of overload freight weight limit |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2156763A (en) * | 1984-03-31 | 1985-10-16 | Penny Hydraulics Limited | Motorised winch or crane with load setting arrangement |
| CN201334334Y (en) * | 2009-01-22 | 2009-10-28 | 中国化学工程第三建设有限公司 | Hoisting machine with overload protection function |
| CN203820344U (en) * | 2014-04-30 | 2014-09-10 | 李军岐 | Material supplementary machine for exterior wall decoration |
| CN204917702U (en) * | 2015-09-06 | 2015-12-30 | 河南中机华远机械工程有限公司 | Take self preservation to protect driving of device |
| CN106276660A (en) * | 2016-08-24 | 2017-01-04 | 德马科起重机械有限公司 | A kind of crashproof stopping means of electric block |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117383441A (en) * | 2023-12-07 | 2024-01-12 | 山西机电职业技术学院 | Overload self-protection crane |
| CN117383441B (en) * | 2023-12-07 | 2024-02-13 | 山西机电职业技术学院 | Overload self-protection crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107311060B (en) | 2023-03-21 |
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