CN107827022A - A kind of pit-hole protection mechanism and method of work from scissor-type mobile lifting platform of walking - Google Patents
A kind of pit-hole protection mechanism and method of work from scissor-type mobile lifting platform of walking Download PDFInfo
- Publication number
- CN107827022A CN107827022A CN201711302429.6A CN201711302429A CN107827022A CN 107827022 A CN107827022 A CN 107827022A CN 201711302429 A CN201711302429 A CN 201711302429A CN 107827022 A CN107827022 A CN 107827022A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- scissor
- pressing plate
- pit
- chassis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 59
- 230000007423 decrease Effects 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/065—Scissor linkages, i.e. X-configuration
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
Abstract
The present invention provides a kind of pit-hole protection mechanism from scissor-type mobile lifting platform of walking.The pit-hole protection mechanism is connected in chassis with scissor; it includes the link assembly of symmetrical setting; described link assembly one end is hinged with chassis, is sequentially provided with long pressing plate, the first fixing axle, short pressing plate and the second fixing axle above the other end, second fixing axle is connected with scissor.Compared with correlation technique, even if a kind of pit-hole protection mechanism from walking scissor-type mobile lifting platform provided by the invention will not also reclaim when supporting plate is by very big side force, have good stability, reduce influence of the external condition to its safety assurance.The structure type of single depression bar, the form than double depression bars is easier, and manufacturing procedure is less.The present invention also provides a kind of method of work of the pit-hole protection mechanism from walking scissor-type mobile lifting platform.
Description
Technical field
The present invention relates to a kind of aerial work platform, more particularly to a kind of pit-hole from scissor-type mobile lifting platform of walking
Protection mechanism and method of work.
Background technology
From walking scissor-type mobile lifting platform can be used in every profession and trade work high above the ground, its can from walk the characteristics of, for height
Idle job saves plenty of time and manpower；But it is in the security of high-order walking position, due to the limitation of ground road conditions, always
There is larger potential safety hazard.
Therefore, it is necessary to provide a kind of pit-hole protection mechanism and method of work solution from scissor-type mobile lifting platform of walking
Certainly above technical problem.
The content of the invention
It is an object of the invention to provide a kind of new pit-hole protection device and method of work, the device can ensure to lift
Platform can ensure the steady security of platform when tire is absorbed in pit-hole, and platform does not have to decline in high-order walking position
To low level walking position, can continue to use.
The present invention provides a kind of pit-hole protection mechanism from walking scissor-type mobile lifting platform in chassis and under it
End be hinged with chassis, upper end is connected through the chassis with scissor, including the first connecting rod of symmetrical setting be articulated with
The second connecting rod of the first connecting rod, the one end of the first connecting rod away from second connecting rod are hinged by supporting plate and chassis, institute
State second connecting rod and close on the opening position of the first connecting rod and be transversely provided with an extension spring and be connected with chassis；The pit-hole protection mechanism is also
Long pressing plate, short pressing plate and the first fixation being vertically arranged between the long pressing plate and short pressing plate set including two spaced horizontals
Axle and the stage clip being sheathed on the outside of first fixing axle, the long pressing plate support with the second connecting rod away from first connecting rod end
Connect, the short pressing plate is provided with the second fixing axle for being used for being connected with the scissor away from stage clip side.
Preferably, two symmetrical holes are equipped among the long pressing plate, first fixing axle runs through the hole and extension
To long pressing plate lower outer, first fixing axle is fixedly connected with short pressing plate.
Preferably, the two symmetrical hole site of long pressing plate is welded with sleeve, the stage clip be connected to sleeve and short pressing plate it
Between.
Preferably, in addition to the sleeve holder assembly that is fixed on chassis, second fixing axle run through the receiver group
Part, the top of second fixing axle are equipped with plastics pressure pad.
Preferably, the supporting plate includes side plate and one end is fixedly connected on the side plate other end and the side on chassis is cut with scissors
The support plate connect, first connecting rod are hinged with the side plate.
Preferably, the side plate closes on chassis side one end and is provided with bumper.
Preferably, the extension spring is fixedly connected by a L-type plate with the bottom plate on chassis.
The present invention also provides a kind of method of work of the pit-hole protection mechanism from walking scissor-type mobile lifting platform, and it is special
Sign is, including：
When scissor declines：
1）Oppressing the second fixing axle by the scissor self gravitation moves down short pressing plate, and the first fixing axle is passed through among long pressing plate
Hole continue to decline；
2）When short pressing plate moves down, stage clip compression, when decrement reaches to a certain degree, the long pressing plate is to torsion caused by second connecting rod
Square is more than the pulling force of extension spring to moment of torsion caused by second connecting rod, rotates clockwise the second connecting rod；
3）The other end rises while described second connecting rod one end declines, and drives the first connecting rod rotate counterclockwise；
4）The first connecting rod drives the supporting plate being hinged on it on chassis its is rotated relative to hinge, until the side plate turns
Into horizontality；
When scissor rises：
5）Stage clip forces short pressing plate to rise, and the short pressing plate drives first fixing axle to rise, and the stage clip pressure reduces；
6）When the pulling force of extension spring and the gravity of supporting plate are more than long pressing plate to second connecting rod to moment of torsion caused by the second connecting rod
During caused moment of torsion, the second connecting rod sends and rotated counterclockwise；
7）The other end can decline while described second connecting rod one end rises, and drive the first connecting rod to rotate clockwise；
8）The first connecting rod drives coupled and is hinged on the supporting plate on chassis and is rotated relative to hinge, until side
Plate changes into plumbness.
Compared with correlation technique, a kind of pit-hole protection mechanism from scissor-type mobile lifting platform of walking provided by the invention
When workbench is in high-order walking position, supporting plate is put down is in plumbness with chassis base plate, and at this moment supporting plate is in three
Linkage crosses dead-centre position, and is fixed on by extension spring on chassis base plate, so even if when supporting plate is by very big side force,
Also it will not reclaim, there is good stability, reduce influence of the external condition to its safety assurance.The structure shape of single depression bar
Formula, the form than double depression bars is easier, and manufacturing procedure is less.The present invention also provides a kind of from walking scissor-type mobile lifting platform
Pit-hole protection mechanism method of work.
Brief description of the drawings
Structure when Fig. 1 is the stretching, extension of the pit-hole protection mechanism provided by the invention from walking scissor-type mobile lifting platform
Schematic diagram；
Fig. 2 is that the attachment structure of the connecting rod provided by the invention from the pit-hole protection mechanism of walking scissor-type mobile lifting platform is shown
It is intended to；
Fig. 3 is that the structure that the pit-hole protection mechanism provided by the invention from walking scissor-type mobile lifting platform is connected with scissor is shown
It is intended to.
In accompanying drawing：
1- supporting plates；101- side plates；102- support plates；2- first connecting rods；3- extension springs；4- second connecting rods；The long pressing plates of 5-；6- stage clips；
The fixing axles of 7- first；The short pressing plates of 8-；9- sleeve holder assemblies；The fixing axles of 10- second；11- scissors；12- sleeves.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention can be mutually combined.For sake of convenience, hereinafter as occurred
" on ", " under ", "left", "right" printed words, only represent that the upper and lower, left and right direction with accompanying drawing in itself is consistent, do not act limiting to structure
It is set for using.
Please refer to Fig. 1, Fig. 2 and Fig. 3, wherein, Fig. 1 is to be provided by the invention from walking scissor-type mobile lifting platform
Pit-hole protection mechanism stretching, extension when structural representation；Fig. 2 is to be provided by the invention from walking scissor-type mobile lifting platform
Pit-hole protection mechanism in connecting rod attachment structure schematic diagram；Fig. 3 puts down to be provided by the invention from walking scissor-type moving lifting
The structural representation that the pit-hole protection mechanism of platform is connected with scissor.
Pit-hole protection mechanism provided by the invention from walking scissor-type mobile lifting platform connects including supporting plate 1, first
Bar 2, extension spring 3, second connecting rod 4, long pressing plate 5, stage clip 6, the first fixing axle 7, short pressing plate 8, the fixing axle of sleeve holder assembly 9 and second
10。
The supporting plate 1 includes side plate 101 and one end is fixedly connected on the other end of side plate 101 and the side on chassis is cut with scissors
The support plate 102 connect.Described one end of first connecting rod 2 is be hinged with the side plate 101, and the other end is be hinged with the second connecting rod 4.It is described
Side plate 101 closes on chassis side one end and is provided with bumper（It is not shown）.
The extension spring 3 laterally located at the second connecting rod 2 and closes on the opening position of the first connecting rod 2, the extension spring 3
The other end is fixedly connected by a L-type plate with the bottom plate on chassis.
The supporting plate 1, first connecting rod 2, second connecting rod 2 and extension spring 3 are two groups altogether, symmetrical in chassis to set
Put.
The long pressing plate 5 is abutted with the second connecting rod 4 away from the end of first connecting rod 2, and two are equipped among the long pressing plate 5
Individual symmetrical holes, the opening position of the symmetrical holes are welded with the sleeve 12.
The short pressing plate 8 is set with the long parallel interval of pressing plate 5, and first fixing axle 7 penetrates described from short pressing plate 8
Two symmetrical holes of long pressing plate 5 and the outside for extending to the long lower section of pressing plate 5.The stage clip 6 be sheathed on first fixing axle 7 it is outer and
It is connected to respectively between sleeve 12 and short pressing plate 8.The short pressing plate 8 is fixedly connected with the first fixing axle 7.
Fixed as shown in Fig. 2 the short pressing plate 8 is provided be used to be connected with the scissor 11 second away from the side of stage clip 6
Axle 10.The sleeve holder assembly 9 is fixed on chassis, and second fixing axle 10 runs through the sleeve holder assembly 9, and described second
The top of fixing axle 10 is equipped with plastics pressure pad.
A kind of method of work of pit-hole protection mechanism from walking scissor-type mobile lifting platform provided by the invention is：
When scissor declines, oppressing the second fixing axle 10 by the self gravitation of scissor 11 moves down short pressing plate 8, and wherein stage clip 6 has
Cushioning effect, the first fixing axle 7 continue to decline through the hole among long pressing plate 5, can so avoid the firm of whole depression bar assembly
Property moves down, and prevents rigid collision, causes to damage.
When short pressing plate 8 moves down, stage clip 6 compresses, and when decrement reaches to a certain degree, long pressing plate 5 is to caused by second connecting rod 4
The pulling force that moment of torsion will be more than extension spring 3 rotates clockwise second connecting rod 4 moment of torsion caused by second connecting rod 4（Refer in figure
Direction）.
The other end can rise while the one end of second connecting rod 4 declines, and drive the rotate counterclockwise of first connecting rod 2（Refer in figure
Direction）, the first connecting rod 2 drives supporting plate 1 that is coupled and being hinged on chassis it is rotated relative to hinge,
Until side plate 101 changes into horizontality, to prevent side plate from being contacted firmly with chassis when going to horizontality, also filled on side plate 101
There is bumper.
When scissor rises, stage clip 6 forces short pressing plate 8 to rise, and short pressing plate 8 rises with the first fixing axle 7, and stage clip 6 is pressed
Power reduces.When the pulling force of extension spring 3 and the gravity of supporting plate 1 are more than long pressing plate 5 to second connecting rod to moment of torsion caused by second connecting rod 4
Caused by 4 during moment of torsion, the second connecting rod 4 rotates counterclockwise（Refer to the direction in figure）.
The other end can decline while described one end of second connecting rod 4 rises, and drive the first connecting rod 2 to rotate clockwise
（Refer to the direction in figure）.The first connecting rod 2 drives supporting plate 1 that is coupled and being hinged on chassis to occur relative to hinge
Rotate, until side plate changes into plumbness.
To prevent supporting plate 1 from producing rotation, the pulling force of extension spring 3 with the debris collision beside chassis when going to plumbness
Overcoming the gravity of depression bar assembly makes second connecting rod 4 abut against on chassis base plate, and supporting plate 1 in this position be dead point and
From dead point closer location, so the outside power to side plate 101 is difficult to be rotated supporting plate 1, reach self-locking purpose.
Whole process is due to having extension spring 3 and stage clip 6 to be used as medium, so to push process than scissor slow for speed.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of pit-hole protection mechanism from scissor-type mobile lifting platform of walking, in chassis and its lower end is cut with scissors with chassis
Connect, upper end is connected through the chassis with scissor, it is characterised in that first connecting rod including symmetrical setting and be articulated with
The second connecting rod of the first connecting rod, the one end of the first connecting rod away from second connecting rod are hinged by supporting plate and chassis, institute
State second connecting rod and close on the opening position of the first connecting rod and be transversely provided with an extension spring and be connected with chassis；The pit-hole protection mechanism is also
Long pressing plate, short pressing plate and the first fixation being vertically arranged between the long pressing plate and short pressing plate set including two spaced horizontals
Axle and the stage clip being sheathed on the outside of first fixing axle, the long pressing plate support with the second connecting rod away from first connecting rod end
Connect, the short pressing plate is provided with the second fixing axle for being used for being connected with the scissor away from stage clip side.
2. the pit-hole protection mechanism according to claim 1 from scissor-type mobile lifting platform of walking, it is characterised in that institute
To state and two symmetrical holes are equipped among long pressing plate, first fixing axle is through the hole and extends to long pressing plate lower outer,
First fixing axle is fixedly connected with short pressing plate.
3. the pit-hole protection mechanism according to claim 2 from scissor-type mobile lifting platform of walking, it is characterised in that institute
State long two symmetrical hole site of pressing plate and be welded with sleeve, the stage clip is connected between sleeve and short pressing plate.
4. the pit-hole protection mechanism according to claim 1 from scissor-type mobile lifting platform of walking, it is characterised in that also
Including the sleeve holder assembly being fixed on chassis, second fixing axle runs through the sleeve holder assembly, second fixing axle
Top plastics pressure pad is housed.
5. the pit-hole protection mechanism according to claim 1 from scissor-type mobile lifting platform of walking, it is characterised in that institute
State supporting plate and be fixedly connected on the side plate other end and the support plate being hinged on chassis, first connecting rod including side plate and one end
It is hinged with the side plate.
6. the pit-hole protection mechanism according to claim 5 from scissor-type mobile lifting platform of walking, it is characterised in that institute
State side plate and close on chassis side one end and be provided with bumper.
7. the pit-hole protection mechanism according to claim 1 from scissor-type mobile lifting platform of walking, it is characterised in that institute
Extension spring is stated to be fixedly connected with the bottom plate on chassis by a L-type plate.
A kind of 8. work of pit-hole protection mechanism from walking scissor-type mobile lifting platform as described in any one of claim 1 ~ 7
Make method, it is characterised in that including：
When scissor declines：
1）Oppressing the second fixing axle by the scissor self gravitation moves down short pressing plate, and the first fixing axle is passed through among long pressing plate
Hole continue to decline；
2）When short pressing plate moves down, stage clip compression, when decrement reaches to a certain degree, the long pressing plate is to torsion caused by second connecting rod
Square is more than the pulling force of extension spring to moment of torsion caused by second connecting rod, rotates clockwise the second connecting rod；
3）The other end rises while described second connecting rod one end declines, and drives the first connecting rod rotate counterclockwise；
4）The first connecting rod drives the supporting plate being hinged on it on chassis its is rotated relative to hinge, until the side plate turns
Into horizontality；
When scissor rises：
5）Stage clip forces short pressing plate to rise, and the short pressing plate drives first fixing axle to rise, and the stage clip pressure reduces；
6）When the pulling force of extension spring and the gravity of supporting plate are more than long pressing plate to second connecting rod to moment of torsion caused by the second connecting rod
During caused moment of torsion, the second connecting rod sends and rotated counterclockwise；
7）The other end can decline while described second connecting rod one end rises, and drive the first connecting rod to rotate clockwise；
8）The first connecting rod drives coupled and is hinged on the supporting plate on chassis and is rotated relative to hinge, until side
Plate changes into plumbness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711302429.6A CN107827022A (en) | 2017-12-11 | 2017-12-11 | A kind of pit-hole protection mechanism and method of work from scissor-type mobile lifting platform of walking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711302429.6A CN107827022A (en) | 2017-12-11 | 2017-12-11 | A kind of pit-hole protection mechanism and method of work from scissor-type mobile lifting platform of walking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107827022A true CN107827022A (en) | 2018-03-23 |
Family
ID=61642376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711302429.6A Pending CN107827022A (en) | 2017-12-11 | 2017-12-11 | A kind of pit-hole protection mechanism and method of work from scissor-type mobile lifting platform of walking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107827022A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744762A (en) * | 2021-01-26 | 2021-05-04 | 浙江加力仓储设备股份有限公司 | Cut fork aerial working platform's pothole protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050224290A1 (en) * | 2004-01-06 | 2005-10-13 | Jlg Industries, Inc. | Pothole protection mechanism |
| CN101125632A (en) * | 2007-09-12 | 2008-02-20 | 许树根 | Aloft work platform with device for preventing pothole tilting |
| JP2009143676A (en) * | 2007-12-13 | 2009-07-02 | Aichi Corp | Falling-down preventive device |
| CN203474404U (en) * | 2013-08-06 | 2014-03-12 | 湖南星邦重工有限公司 | Device for protecting aerial work platform against pits and holes |
| CN204661271U (en) * | 2015-03-18 | 2015-09-23 | 长沙天盾重工有限责任公司 | A kind of aerial platform protecting chassis |
| CN105016246A (en) * | 2015-07-23 | 2015-11-04 | 浙江鼎力机械股份有限公司 | Scissors aerial work platform |
| CN106698284A (en) * | 2017-01-11 | 2017-05-24 | 诺力机械股份有限公司 | Pot hole supporting and protecting device of high-altitude work platform |
| CN207973451U (en) * | 2017-12-11 | 2018-10-16 | 湖南杰希重工有限公司 | A kind of pit-hole protection mechanism from scissor-type mobile lifting platform of walking |
-
2017
- 2017-12-11 CN CN201711302429.6A patent/CN107827022A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050224290A1 (en) * | 2004-01-06 | 2005-10-13 | Jlg Industries, Inc. | Pothole protection mechanism |
| CN101125632A (en) * | 2007-09-12 | 2008-02-20 | 许树根 | Aloft work platform with device for preventing pothole tilting |
| JP2009143676A (en) * | 2007-12-13 | 2009-07-02 | Aichi Corp | Falling-down preventive device |
| CN203474404U (en) * | 2013-08-06 | 2014-03-12 | 湖南星邦重工有限公司 | Device for protecting aerial work platform against pits and holes |
| CN204661271U (en) * | 2015-03-18 | 2015-09-23 | 长沙天盾重工有限责任公司 | A kind of aerial platform protecting chassis |
| CN105016246A (en) * | 2015-07-23 | 2015-11-04 | 浙江鼎力机械股份有限公司 | Scissors aerial work platform |
| CN106698284A (en) * | 2017-01-11 | 2017-05-24 | 诺力机械股份有限公司 | Pot hole supporting and protecting device of high-altitude work platform |
| CN207973451U (en) * | 2017-12-11 | 2018-10-16 | 湖南杰希重工有限公司 | A kind of pit-hole protection mechanism from scissor-type mobile lifting platform of walking |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744762A (en) * | 2021-01-26 | 2021-05-04 | 浙江加力仓储设备股份有限公司 | Cut fork aerial working platform's pothole protection device |
| CN112744762B (en) * | 2021-01-26 | 2024-05-07 | 浙江加力仓储设备股份有限公司 | Hollow protection device of scissor type aerial work platform |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180323 |
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