CN106082048B - A kind of jacking equipment safety device - Google Patents
A kind of jacking equipment safety device Download PDFInfo
- Publication number
- CN106082048B CN106082048B CN201610645802.7A CN201610645802A CN106082048B CN 106082048 B CN106082048 B CN 106082048B CN 201610645802 A CN201610645802 A CN 201610645802A CN 106082048 B CN106082048 B CN 106082048B
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- Prior art keywords
- lifting
- hole
- lifting seat
- plate
- electric switch
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Classifications
-
- 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
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Invalid Beds And Related Equipment (AREA)
Abstract
The present invention relates to a kind of jacking equipment safety device, the device includes lifting seat and stop pedestal, and lifting direction of the stop pedestal along jacking equipment is set, and rack is provided with along lifting direction on stop pedestal；Lifting seat is connected by the lifting drive of elastic parts and jacking equipment；The elastic stretch direction of elastic parts is provided with electric switch, and elastic parts does not contact with electric switch under normal jacking condition；Jackshaft is fixedly connected with the axle center of gear；Electric switch electrically connects with electromagnetic clutch；Electromagnetic clutch is arranged on jackshaft, and under normal jacking condition, electromagnetic clutch is in disengaged condition.When lifting drive breaks down, electric switch is touched in lifting seat free-falling, elastic parts stretching, extension, and electric switch control electromagnetic clutch encases jackshaft, and gear is locked on rack.The device realizes the dual security protection of mechanical stop and electrical control stop to jacking equipment when jacking equipment breaks down, and improves the Security mechanism of jacking equipment.
Description
Technical field
The present invention relates to a kind of safety device of jacking equipment, refers specifically to a kind of achievable machine-electric double protection
Jacking equipment safety device.
Background technology
Elevating function and corresponding mechanism are both provided with many plant equipment, for heavier Lift Part or important field
Close, there must be safety prevention measure to the operation for lifting part.In the prior art, the measure of plant equipment elevating safety is adopted mostly
The methods of with security warning, isolating and protecting cover plate, buffer unit or simple mechanical formula stop is set, these methods are difficult to meet weight
The safety requirements of lowering or hoisting gear under other special operation conditions such as load.For simple mechanical formula stop protector, when there is stop machine
During the situation such as structure loosening or skidding protection can be caused to fail, it is possible to causing the substantial spoilage or security incident of equipment.Institute
To research and develop a kind of simple structure, have the jacking equipment safety device of multiple protection mechanisms significant.
The content of the invention
Present invention seek to address that the defects of prior art, there is provided one kind can both realize mechanical stop, again can be by electric
Control carries out the Double-lifting safety device of electromagnetic brake stop.
Technical scheme is as follows：
A kind of jacking equipment safety device, including lifting seat, stop pedestal, liter of the described stop pedestal along jacking equipment
Drop direction to set, rack is provided with along lifting direction on described stop pedestal；
Described lifting seat includes elastic parts, electric switch, gear, jackshaft, electromagnetic clutch；Described lifting seat
Connected by the lifting drive of elastic parts and jacking equipment, lifted under lifting drive driving；Described elasticity
The elastic stretch direction of component is provided with electric switch, and under normal jacking condition, elastic parts is in compressive state, elastic parts
Do not contacted with electric switch；
Described jackshaft is fixedly connected along the axially arranged of gear, jackshaft with the axle center of gear；Described electrically opens
Pass electrically connects with electromagnetic clutch；Described electromagnetic clutch is arranged on jackshaft, under normal jacking condition, electromagnetic clutch
Device is in disengaged condition, and gear and rack normally engage operating；
When lifting drive failure, lifting seat free-falling, elastic parts stretching, extension touching electric switch, electrically
Switch control electromagnetic clutch, which combines, encases jackshaft so that gear is locked on rack, and lifting seat can not continue to decline and real
The electromagnetic brake stop of existing electrical control.
Described elastic parts includes spring, pulling plug, connecting rod, swinging plate；The internal diameter of described spring is more than the straight of connecting rod
Footpath；
Described lifting seat includes the transverse slat perpendicular to lifting direction, and through hole I is offered on described transverse slat, and described dials
Dynamic plate is provided with through hole III；
Described through hole I and through hole III diameter are more than internal diameter of the diameter less than spring of connecting rod；Described small end
It is connected with pulling plug, through through hole I and through hole III, the lower end of connecting rod is provided with the fixing device I more than through hole III diameters, connecting rod for lower end
Upper end be provided with more than through hole I fixing device I I；Spring is cased with connecting rod between described swinging plate and through hole I.
Connecting rod between described swinging plate and through hole I is provided with spacer, and spring housing is loaded on spacer.
Described stop pedestal is arranged at intervals multigroup scotch along lifting direction, and described scotch is provided with and lifting side
To vertical table top；Described lifting seat is provided with linkage board；Described linkage board includes plate I and plate II, and the one of described plate I
End rivets with swinging plate activity, and the other end and plate II upper end tilt or vertical connection；Described plate II lower end is to stop
The stop Block direction extension of pedestal, corresponding scotch position；The middle part of riser of the lifting seat along lifting direction also opens up through hole II,
Plate II lower end part is in through hole II, and under normal jacking condition, the riser of plate II and lifting seat is at an angle to be tilted towards
On；After lifting drive fails, linkage board is rotated to plate II be horizontally oriented after, plate II bottom passes through hole II
Towards stop pedestal, during lifting seat continues decline, plate II bottom is stuck on the platform of scotch, makes lifting seat
It can not continue to decline and realize mechanical stop.
Pin-and-hole I is opened up in the middle part of described plate II, the wherein one or both sides of the left and right sides open up pin-and-hole II on lifting seat,
Load swivel pin in pin-and-hole I, swivel pin makes linkage board be installed on lifting seat, described connection through the pin-and-hole II on lifting seat
Dynamic plate can rotate by axle of swivel pin；Described swinging plate can drive linkage board to rotate, and rotation direction is towards stop pedestal
Scotch；Under normal jacking condition, swinging plate and linkage board are relative to lifting dwell of sley, lifting seat and linkage board and stop
Block does not contact.
Bearing is set respectively in the left side of the left and right sides of gear and electromagnetic clutch, jackshaft is installed on by bearing
On lifting seat.
The operation principle of the present invention is as follows：Using elevating mechanism in normal elevating movement and failure two states stress characteristic
Difference, by the joint-action mechanism between mechanical mechanism, the disengagement or combination of safety interlock are realized, so as to realize that machinery stops
The function of safety protection of dynamic formula；Meanwhile electric switch is disengaged or is triggered by mechanical linkage which controls, and then pass through electrical control
Electromagnetic clutch is realized relative disengagement or band-type brake with pinion and rack, realize the function of safety protection of electromagnetic brake formula.
Concrete implementation mode is：When mechanical device is in normal jacking condition, in the pulling of lifting driver part
Under, pulling plug against effect between fixing device I, swinging plate, spacer by mutually driving lifting seat to carry out elevating movement, now, bullet
Spring is in compressive state, and plate II and lifting direction inclination at an angle, the plate II end of linkage board are located in through hole II,
Spatially separated with scotch；Electric switch is not triggered simultaneously, and electromagnetic clutch is in disengaged condition, wheel and rack
Between normal engagement operating, elevating mechanism proper motion.When lifting driver part catastrophic failure, pulling plug is lost to lifting seat
Upward pulling force, whole lifting seat freely glide, now, whole elastic group under the elastic restitution of the spring compressed
Part moves down relative to lifting seat, and the pin of stirring of swinging plate end stirs the linkage board being attached thereto, and makes linkage board around hinge
The center of pin turns clockwise, until plate II is rotated to horizontal level and vertical with lifting direction, plate II lower end passes logical
Hole II stretches to stop pedestal；When elastic parts, which moves down, makes fixing device I I with lifting seat transverse slat top contact, linkage board
Plate II is horizontally oriented, and during lifting seat glides, the end that plate II passes through hole II snaps into scotch and lifting side
To on vertical table top, so as to which lifting seat is integrally stopped relative to stop pedestal, mechanical stop is realized；At the same time,
During being rotated clockwise to horizontal level due to linkage board, the outer triggering electric switch of linkage board, pass through electrical control
Combine electromagnetic clutch and embrace jackshaft, so as to cause the engaged transmission of gear and the rack on stop pedestal to stop, in tooth
Wheel, rack link realize the stop of lifting seat, realize the electromagnetic brake stop of electrical control.
The advance of the present invention is：By setting linkage board and scotch, when lifting driver part fails, pass through machine
The joint-action mechanism of tool part realizes the mechanical stop of lowering or hoisting gear；Meanwhile between lifting seat and stop pedestal set gear,
Rack-driving mechanism, when lifting driver part fails by triggering electric switch, realize the band-type brake stop of electromagnetic clutch；If
Dual means of retention is put, even if one of which means of retention fails, also ensures that and dress is lifted under lifting driver part failure conditions
The stop put, so as to substantially increase the security of equipment, reduce accident rate；Upper limit part and lower limit are set on pulling plug
Part, the effective travel of pulling plug is limited, in the case where lifting driver part fails, the presence of upper limit part make it that linkage board is more smart
Really it is stuck on scotch, effectively realizes mechanical stop.
Brief description of the drawings
Fig. 1 is the front view of safety device of the present invention
Fig. 2 is the side view of safety device of the present invention
Fig. 3 is the partial view under arrested state
Each sequence number sign and corresponding structure title are as follows in figure：1- scotch, 2- linkage boards, 21- plates I, 22- plate II,
23- pin-and-holes I, 3- lifting seat, 31- through holes I, 32- through hole II, 33- pin-and-hole II, 4- spring, 5- pulling plugs, 6- connecting rods, 7- spacers, 8-
Swinging plate, 81- stir pin, 9- fixing device Is I, 10- electric switch, 11- swivel pins, 12- gears, 13- jackshafts, 14- racks,
15- stop pedestals, 16- electromagnetic clutch, 17- bearings, 18- fixing device Is.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment 1
As Figure 1-3, a kind of jacking equipment safety device, including lifting seat 3, stop pedestal 15, described stop base
Lifting direction of the seat 15 along jacking equipment is set, and rack 14 is provided with along lifting direction on described stop pedestal 15；
Lifting seat 3 includes elastic parts, electric switch 10, gear 12, jackshaft 13, electromagnetic clutch 16；Described liter
Drop seat 3 to connect by the lifting drive of elastic parts and jacking equipment, lifted under lifting drive driving；Described
The elastic stretch direction of elastic parts is provided with electric switch 10, and under normal jacking condition, elastic parts is in compressive state, bullet
Property component does not contact with electric switch 10；
Described jackshaft 13 is fixedly connected along the axially arranged of gear 12, jackshaft 13 with the axle center of gear 12；It is described
Electric switch 10 electrically connected with electromagnetic clutch 16；Described electromagnetic clutch 16 is arranged on jackshaft 13, is normally being risen
Under drop state, electromagnetic clutch 16 is in disengaged condition, gear 12 and the normally engagement operating of rack 14；
When lifting drive failure, 3 free-falling of lifting seat, elastic parts stretching, extension touching electric switch 10,
Electric switch 10 control electromagnetic clutch 16 combine encases jackshaft 13 so that gear 12 is locked on rack 14, lifting seat without
Method continues to decline and realize the electromagnetic brake stop of electrical control.
Described elastic parts includes spring 4, pulling plug 5, connecting rod 6, swinging plate 8；The internal diameter of described spring 4 is more than connecting rod
6 diameter；
Described lifting seat 3 includes the transverse slat perpendicular to lifting direction, and through hole I31 is offered on described transverse slat, described
Swinging plate 8 be provided with through hole III；
Described through hole I31 and through hole III diameter are more than internal diameter of the diameter less than spring 4 of connecting rod 6；Described connecting rod
6 upper ends are connected with pulling plug 5, and lower end is provided with consolidating more than through hole III diameters through through hole I31 and through hole III, the lower end of connecting rod 6
Determine part I18, the upper end of connecting rod 6 is provided with the fixing device I I9 more than through hole I31；Company between described swinging plate 8 and through hole I31
Spring 4 is cased with bar 6.
Connecting rod 6 between described swinging plate 8 and through hole I31 is provided with spacer 7, and spring 4 is set on spacer 7.
Described stop pedestal 15 is arranged at intervals multigroup scotch 1 along lifting direction, and described scotch 1 is provided with and liter
The vertical table top in direction drops；Described lifting seat 3 is provided with linkage board 2；Described linkage board 2 includes plate I21 and plate II22, institute
The plate I21 stated one end rivets with the activity of swinging plate 8, and the other end and plate II22 upper end tilt or vertical connection；Described
Plate II22 lower end extends to the direction of scotch 1 of stop pedestal 15, the corresponding position of scotch 1；Lifting seat 3 is along lifting direction
The middle part of riser also opens up through hole II32, and plate II22 lower end part is in through hole II32, under normal jacking condition, plate II22 with
The riser of lifting seat 3 is at an angle to be tilted upward；After lifting drive fails, linkage board 3 is rotated to plate II22
After horizontal direction, plate II22 bottom passes through hole II32 towards stop pedestal 15, in the process that lifting seat 3 continues to decline
In, plate II22 bottom is stuck on the platform of scotch 1, makes lifting seat can not continue to decline and realize mechanical stop.
Pin-and-hole I23 is opened up in the middle part of described plate II22, the wherein one or both sides of the left and right sides open up pin on lifting seat
Load swivel pin 11 in hole II33, pin-and-hole I23, swivel pin 11 is installed on linkage board 2 through the pin-and-hole II33 on lifting seat 3
On lifting seat 3, described linkage board 2 can be rotated with swivel pin 11 for axle；Described swinging plate 8 can drive 2 turns of linkage board
It is dynamic, scotch 1 of the rotation direction towards stop pedestal 15；Under normal jacking condition, swinging plate 8 and linkage board 2 are relative to liter
Drop seat 3 is static, and lifting seat 3 and linkage board 2 do not contact with scotch 1.
Bearing 17 is set respectively in the left and right sides of gear 12 and the left side of electromagnetic clutch 16, jackshaft 13 passes through axle
17 are held to be installed on lifting seat 3.
The operation principle of the present invention is as follows：Using elevating mechanism in normal elevating movement and failure two states stress characteristic
Difference, by the joint-action mechanism between mechanical mechanism, the disengagement or combination of safety interlock are realized, so as to realize that machinery stops
The function of safety protection of dynamic formula；Meanwhile electric switch is disengaged or is triggered by mechanical linkage which controls, and then pass through electrical control
Electromagnetic clutch is realized relative disengagement or band-type brake with pinion and rack, realize the function of safety protection of electromagnetic brake formula.
Concrete implementation mode is：When mechanical device is in normal jacking condition, in the pulling of lifting driver part
Under, pulling plug 5 drives lifting seat 3 to carry out elevating movement by mutually abutting effect between fixing device I 18, swinging plate 8, spacer 7, this
When, spring 4 is in compressive state, plate II22 and lifting direction inclination at an angle, the plate II22 bottom of linkage board 2
In through hole II32, spatially separated with scotch 1；Electric switch 10 is not triggered simultaneously, at electromagnetic clutch 16
Normally operating, elevating mechanism proper motion are engaged between disengaged condition, gear 12 and rack 14.When lifting driver part is unexpected
During failure, pulling plug 5 loses the pulling force upward to lifting seat 3, and whole lifting seat 3 freely glides, now, in the spring compressed
Under 4 elastic restitution, whole elastic parts is moved down relative to lifting seat 3, and the pin 81 of stirring of the end of swinging plate 8 is stirred
The linkage board 2 being attached thereto, makes linkage board 2 be turned clockwise around the center of swivel pin 11, until plate II22 is rotated to level
Position is simultaneously vertical with lifting direction, and plate II22 lower end passes through hole II32 and stretches to stop pedestal 15；When elastic parts is to moving down
Dynamic when making fixing device I I9 with 3 transverse slat top contact of lifting seat, the plate II22 of linkage board 2 is horizontally oriented, and is glided in lifting seat
During continuation, the end that plate II22 passes through hole II32 is snapped on the table top vertical with lifting direction of scotch 1, so as to rise
Drop seat 3 is overall to be stopped relative to stop pedestal 15, realizes mechanical stop；At the same time, due to the dextrorotation of linkage board 2
During going to horizontal level, the outer triggering electric switch 10 of linkage board 2, the knot of electromagnetic clutch 16 is made by electrical control
Fill the span of a man's arms jackshaft 13, so as to cause the engaged transmission of gear 12 and the rack 14 on stop pedestal 15 to stop, in gear, rack
Link realizes the stop of lifting seat, realizes the electromagnetic brake stop of electrical control.
Claims (5)
1. a kind of jacking equipment safety device, including lifting seat（3）, stop pedestal（15）, it is characterised in that：
Described stop pedestal（15）Set along the lifting direction of jacking equipment, described stop pedestal（15）Upper edge lifting direction
Provided with rack（14）；
Described lifting seat（3）Including elastic parts, electric switch（10）, gear（12）, jackshaft（13）, electromagnetic clutch
（16）；Described lifting seat（3）Connected by the lifting drive of elastic parts and jacking equipment, driven in lifting drive
Dynamic lower lifting；The elastic stretch direction of described elastic parts is provided with electric switch（10）, under normal jacking condition, elastic group
Part is in compressive state, elastic parts and electric switch（10）Do not contact；
Described jackshaft（13）Along gear（12）Axially arranged, jackshaft（13）With gear（12）Axle center be fixedly connected；
Described electric switch（10）With electromagnetic clutch（16）Electrical connection；Described electromagnetic clutch（16）It is arranged on jackshaft（13）
On, under normal jacking condition, electromagnetic clutch（16）In disengaged condition, gear（12）And rack（14）Normal engagement fortune
Turn；
When lifting drive failure, lifting seat（3）During free-falling, elastic parts stretching, extension touching electric switch（10）,
Electric switch（10）Control electromagnetic clutch（16）With reference to encasing jackshaft（13）So that gear（12）It is locked at rack（14）
On.
2. jacking equipment safety device as claimed in claim 1, it is characterised in that：Described elastic parts includes spring（4）、
Pulling plug（5）, connecting rod（6）, swinging plate（8）；Described spring（4）Internal diameter be more than connecting rod（6）Diameter；
Described lifting seat（3）Including the transverse slat perpendicular to lifting direction, through hole I is offered on described transverse slat（31）, it is described
Swinging plate（8）It is provided with through hole III；
Described through hole I（31）It is more than connecting rod with through hole III diameter（6）Diameter be less than spring（4）Internal diameter；Described company
Bar（6）Upper end and pulling plug（5）Connection, lower end passes through through hole I（31）With through hole III, connecting rod（6）Lower end be provided be more than through hole
The fixing device I of III diameters（18）, connecting rod（6）Upper end be provided be more than through hole I（31）Fixing device I I（9）；Described swinging plate
（8）With through hole I（31）Between connecting rod（6）On be cased with spring（4）.
3. jacking equipment safety device as claimed in claim 2, it is characterised in that：Described swinging plate（8）With through hole I（31）
Between connecting rod（6）It is provided with spacer（7）, spring（4）It is set in spacer（7）On.
4. jacking equipment safety device as claimed in claim 2, it is characterised in that：Described stop pedestal（15）Along lifting side
Multigroup scotch is arranged at intervals upwards（1）, described scotch（1）Provided with the table top vertical with lifting direction；Described lifting
Seat（3）It is provided with linkage board（2）；Described linkage board（2）Including plate I（21）With plate II（22）, described plate I（21）One end
With swinging plate（8）Activity riveting, the other end and plate II（22）Upper end tilt or vertical connection；Described plate II（22）Under
Hold to stop pedestal（15）Scotch（1）Direction extends, corresponding scotch（1）Position；
Described plate II（22）Middle part opens up pin-and-hole I（23）, pin-and-hole I（23）Middle loading swivel pin（11）, pass through swivel pin（11）
It is installed on lifting seat（3）On, described linkage board（2）Can be with swivel pin（11）Rotated for axle；Described swinging plate（8）Can
Drive linkage board（2）Rotate, rotation direction is towards stop pedestal（15）Scotch（1）；Under normal jacking condition, swinging plate
（8）And linkage board（2）Relative to lifting seat（3）It is static, lifting seat（3）And linkage board（2）With scotch（1）Do not contact.
5. jacking equipment safety device as claimed in claim 1, it is characterised in that：In gear（12）The left and right sides and electricity
Magnet clutch（16）Left side bearing is set respectively（17）, jackshaft（13）Pass through bearing（17）It is installed on lifting seat（3）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610645802.7A CN106082048B (en) | 2016-08-09 | 2016-08-09 | A kind of jacking equipment safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610645802.7A CN106082048B (en) | 2016-08-09 | 2016-08-09 | A kind of jacking equipment safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106082048A CN106082048A (en) | 2016-11-09 |
| CN106082048B true CN106082048B (en) | 2018-04-03 |
Family
ID=57455730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610645802.7A Expired - Fee Related CN106082048B (en) | 2016-08-09 | 2016-08-09 | A kind of jacking equipment safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106082048B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108002319A (en) * | 2017-12-29 | 2018-05-08 | 青岛中海德自动化设备有限公司 | A kind of falling-proof safety device |
| CN110407059B (en) * | 2019-07-02 | 2024-01-16 | 广西科技大学 | Safety protection device for cable chain lifting system |
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| CA2547286A1 (en) * | 2006-05-19 | 2007-11-19 | Gerard Noel | Braking device for elevating platform assembly |
| CN201419993Y (en) * | 2009-03-26 | 2010-03-10 | 烟台未来自动装备有限责任公司 | Mechanical electromagnetic safe lock for buried type lifting machine |
| CN202924690U (en) * | 2012-11-26 | 2013-05-08 | 甘肃建投装备制造有限公司 | Multifunctional intelligent overhauling and detecting platform |
| CN103771306A (en) * | 2014-01-24 | 2014-05-07 | 江苏普腾停车设备有限公司 | Mechanical type dynamic anti-falling device and lifting platform assembled with same |
| CN204737705U (en) * | 2015-06-04 | 2015-11-04 | 安徽鲲鹏装备模具制造有限公司 | Lifting device for prevent whereabouts |
| CN206014348U (en) * | 2016-08-09 | 2017-03-15 | 广西科技大学 | A kind of jacking equipment safety device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011012207A1 (en) * | 2011-02-23 | 2012-08-23 | Itw Packaging Systems Group Gmbh | Lifting device with safety device |
-
2016
- 2016-08-09 CN CN201610645802.7A patent/CN106082048B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2547286A1 (en) * | 2006-05-19 | 2007-11-19 | Gerard Noel | Braking device for elevating platform assembly |
| CN201419993Y (en) * | 2009-03-26 | 2010-03-10 | 烟台未来自动装备有限责任公司 | Mechanical electromagnetic safe lock for buried type lifting machine |
| CN202924690U (en) * | 2012-11-26 | 2013-05-08 | 甘肃建投装备制造有限公司 | Multifunctional intelligent overhauling and detecting platform |
| CN103771306A (en) * | 2014-01-24 | 2014-05-07 | 江苏普腾停车设备有限公司 | Mechanical type dynamic anti-falling device and lifting platform assembled with same |
| CN204737705U (en) * | 2015-06-04 | 2015-11-04 | 安徽鲲鹏装备模具制造有限公司 | Lifting device for prevent whereabouts |
| CN206014348U (en) * | 2016-08-09 | 2017-03-15 | 广西科技大学 | A kind of jacking equipment safety device |
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| CN106082048A (en) | 2016-11-09 |
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