CN109703774A - The operating mechanism of tractor in airfield ground support equipment - Google Patents
The operating mechanism of tractor in airfield ground support equipment Download PDFInfo
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- CN109703774A CN109703774A CN201910154987.5A CN201910154987A CN109703774A CN 109703774 A CN109703774 A CN 109703774A CN 201910154987 A CN201910154987 A CN 201910154987A CN 109703774 A CN109703774 A CN 109703774A
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Abstract
The present invention provides the operating mechanism of the tractor in airfield ground support equipment, including tractor, side wall inside groove, lifting groove pushes and pulls rocking bar, auxiliary movable board, towing plate, socket, cutting and connecting plate；Side wall inside groove is offered inside the tractor two sides, and side wall inside groove top side offers lifting groove；Outer end, which is bolted, among the side wall inside groove is provided with inside mounting plate, and towing tank passes through inside mounting plate limit and is set in side wall inside groove；By being provided with lifting frame and towing plate, aircraft nose wheel can effectively be fixed and be lifted, it is convenient that aircraft is drawn, and towing plate carries out switch by rocker device and is conducive to flexibly use, structure simply saves cost, and, towing plate can pass through socket by cutting after rotation and carry out assembled fix, simple and stable structure is strong, significantly improves the stability of towing plate, is conducive to fast fix aircraft nose wheel.
Description
Technical field
The present invention relates to airport ground safeguards technique fields, more specifically, in particular in airfield ground support equipment
Tractor operating mechanism.
Background technique
Aircraft tractor is a kind of guarantee equipment in airport ground towing aircraft, can also be same during aircraft manufacturing
In mobile Large Aircraft Components or aircraft, when aircraft, which needs to release from shelter bridge or aircraft gate, starts engine, it is necessary to
Aircraft is shifted onto start position by trailer, and aircraft does not have power at this time, and aircraft rearwardly direction is controlled by tractor completely.
Based on above-mentioned, structure is complicated for the workpiece mechanism of tractor used at present, and subtle workpiece is more, be unfavorable for saving at
This, and needs control the package operation of exterior portion by using different orientation when drawing wheel, closure stress is larger,
Regulating power is low, is unfavorable for carrying heavy objects and carries out the adjusting of integral position.
Then, it in view of this, being studied improvement for existing structure and missing, provides in airfield ground support equipment
Tractor operating mechanism, to achieve the purpose that with more more practical value.
Summary of the invention
(1) technical problem
In conclusion the present invention provides the operating mechanism of the tractor in airfield ground support equipment, pass through structure and functionality
Improvement, with the workpiece mechanism that solves tractor, structure is complicated, and subtle workpiece is more, is unfavorable for saving cost, and in dragger
Need to control the package operation of exterior portion when wheel by using different orientation, closure stress is larger, and regulating power is low, no
The problem of conducive to carrying heavy objects and carrying out the adjusting of integral position.
(2) technical solution
The present invention provides the operating mechanisms of the tractor in airfield ground support equipment, for drawing aircraft to navigation channel.
In the operating mechanism of the tractor in airfield ground support equipment provided by the invention, specifically include:
Tractor, side wall inside groove, lifting groove, inside mounting plate, lifting frame, longitudinal balance plate, accessory plate, towing tank, raised line are led
Draw bar, electric cylinder A pushes and pulls rocking bar, auxiliary movable board, towing plate, socket, electric cylinder B, cutting, connecting plate and electric cylinder C；Institute
It states and offers side wall inside groove inside tractor two sides, and side wall inside groove top side offers lifting groove；In the side wall
Outer end, which is bolted, among slot is provided with inside mounting plate, and towing tank passes through inside mounting plate limit and is set to side
In wall inside groove；The one lateral roof integral type of lifting frame is provided with two groups of accessory plates, and accessory plate bottom and tractor medial roof
It is bolted among portion and is provided with two groups of telescopic rods.
Preferably, lifting frame front end integral type is provided with two groups of cambered surface vertical blocks；The equal integral type in lifting frame two sides
It is provided with longitudinal balance plate, and longitudinal balance plate outer end bottom offers circular hole；It opens on the longitudinal balance plate circular hole top
Equipped with four groups of through-holes.
Preferably, the towing tank inner end, which is bolted, is provided with draw bar, and draw bar one end both passes through axis
It is bolted to balance plate circular hole and is provided with connecting plate；Pass through at the top of the connecting plate with through hole at the top of longitudinal balance plate
Bolt is arranged electric cylinder C and moves connection.
Preferably, two groups of raised lines are arranged in the equal integral type of the towing tank opening inside bottom；The traction box opening turns
It is set as connecting shaft structure at folding, and towing plate is movably set with by shaft in connecting shaft structure；At the towing tank inner side end
It is bolted and is provided with electric cylinder A, and push-and-pull rocking bar is arranged by bolt for the outer end electric cylinder A and towing plate movement connects.
Preferably, the towing plate quantity is set as two groups, and towing plate can be rotated by 90 ° splicing by connecting shaft structure；Institute
It states towing plate stitching portion and is respectively set to bevel structure, and inclined-plane is located at the control of the outer electric cylinder A of one group of towing plate of inner end and opens
The time is moved earlier than another group of towing plate and its interlink electric cylinder A.
Preferably, the towing plate height be lower than towing tank open height, and towing plate reverse side be rotated by 90 ° after can
It is contacted with raised line side surface；The equal integral type of towing plate inside bottom is provided with protrusion globoidal structure；The towing plate two sides
The equal integral type in back is provided with socket, and towing plate side is bolted and is provided with electric cylinder B；The outer end the electric cylinder B
It is bolted and is provided with cutting, and cutting is interspersed in one group of socket by clearance fit.
Preferably, the towing tank bottom, which is bolted, is provided with multiple groups electrohydraulic cylinder, and electric hydaulic cylinder bottom
Portion, which is bolted, is provided with auxiliary movable board；The auxiliary movable board bottom, which is bolted, is provided with multiple groups pulley.
Preferably, the equal integral type of the connecting plate bottom is provided with electrohydraulic cylinder, and connecting plate bottom electrohydraulic cylinder
It is consistent with speed with the range of lift of auxiliary movable board overhead electric hydraulic cylinder.
(3) beneficial effect
The present invention provides the operating mechanisms of the tractor in airfield ground support equipment, by being provided with lifting frame and traction
Aircraft nose wheel can effectively be fixed and be lifted by plate, convenient to draw to aircraft, and towing plate is opened by rocker device
Pass is conducive to flexibly use, and structure simply saves cost, also, towing plate can be carried out by cutting across socket after rotation
Assembly is fixed, and simple and stable structure is strong, significantly improves the stability of towing plate, is conducive to carry out aircraft nose wheel quick
It is fixed.
Secondly, the setting of towing tank and draw bar makes effectively by towing tank in conjunction with lifting frame by towing tank and lifting frame
It is formed and is axially moved structure, so that the position to towing tank is adjusted axially, and fixation is clamped to aircraft nose wheel, it can be with
The movement for carrying out different length is controlled according to different wheel footpaths, strong applicability structure is simple, is conducive to the balance for keeping tractor.
Furthermore the setting of auxiliary movable board provides good auxiliaring effect for the axial movement of towing tank, passes through pulley
It can be convenient the smooth movement of towing tank and keep balancing, towing tank and longitudinal balance board bottom portion are provided with hydraulic cylinder, can be with
It is synchronized in different location and drags aircraft nose wheel, while keeping the balance of tractor, be conducive to aircraft nose wheel lifts traction.
Detailed description of the invention
Fig. 1 is the vertical view partial cutaway structural schematic diagram in the embodiment of the present invention；
Fig. 2 is the main view partial cutaway structural schematic diagram in the embodiment of the present invention；
Fig. 3 is the schematic perspective view of tractor in the embodiment of the present invention；
Fig. 4 is the schematic perspective view of lifting frame in the embodiment of the present invention；
Fig. 5 is the schematic perspective view of towing tank in the embodiment of the present invention；
Fig. 6 is the schematic perspective view of towing plate in the embodiment of the present invention；
Fig. 7 is the A partial enlargement structural representation in the embodiment of the present invention；
Fig. 8 is the B partial enlargement structural representation in the embodiment of the present invention；
In Fig. 1 into Fig. 8, the corresponding relationship of component names or lines and accompanying drawing number are as follows:
1, tractor, 101, side wall inside groove, 102, lifting groove, 2, inside mounting plate, 3, lifting frame, 301, longitudinal balance
Plate, 302, accessory plate, 4, towing tank, 401, raised line, 402, draw bar, 403, electric cylinder A, 404, push-and-pull rocking bar,
405, auxiliary movable board, 5, towing plate, 501, socket, 502, electric cylinder B, 503, cutting, 6, connecting plate, 601, electronic
Cylinder C.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment is used for
Illustrate the present invention, but cannot be used to limit the scope of the invention.
In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more；Term " on ",
The orientation or positional relationship of the instructions such as "lower", "left", "right", "inner", "outside", " front end ", " rear end ", " head ", " tail portion " is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second ", " third " etc. are used for description purposes only, and should not be understood as instruction or
Imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connected " " connects
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, it can also be indirectly connected through an intermediary.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Fig. 1 is please referred to Fig. 8.
In order to solve the tractor in airfield ground support equipment in the prior art operating mechanism's tractor workpiece machine
Structure is complicated for structure, and subtle workpiece is more, is unfavorable for saving cost, and need to come by using different orientation when drawing wheel
The package operation of exterior portion is controlled, closure stress is larger, and regulating power is low, is unfavorable for carrying heavy objects and carries out whole position
The problem of adjusting set, the invention proposes the operating mechanisms of the tractor in airfield ground support equipment, for leading aircraft
It leads at navigation channel, comprising: tractor 1, side wall inside groove 101, lifting groove 102, inside mounting plate 2, lifting frame 3, longitudinal balance plate
301, accessory plate 302, towing tank 4, raised line 401, draw bar 402, electric cylinder A403, push-and-pull rocking bar 404, auxiliary movable board 405,
Towing plate 5, socket 501, electric cylinder B502, cutting 503, connecting plate 6 and electric cylinder C601；Tractor opens up inside 1 two sides
There is side wall inside groove 101, and 101 top side of side wall inside groove offers lifting groove 102；The intermediate outer end of side wall inside groove 101 is logical
It crosses bolt and is fixedly installed inside mounting plate 2, and towing tank 4 is set to side wall inside groove 101 by the limit of inside mounting plate 2
In；3 one lateral roof integral type of lifting frame is provided with two groups of accessory plates 302, and 302 bottom of accessory plate and 1 inside top of tractor
Centre, which is bolted, is provided with two groups of telescopic rods.
Wherein, 3 front end integral type of lifting frame is provided with two groups of cambered surface vertical blocks；The equal integral type in 3 two sides of lifting frame is provided with axis
To balance plate 301, and 301 outer end bottom of longitudinal balance plate offers circular hole；301 circular hole top of longitudinal balance plate offers
Four groups of through-holes can provide auxiliary by the way that balance plate 301 is arranged for the lifting of lifting frame 3 and the axial movement of towing tank 4.
Wherein, 4 inner end of towing tank, which is bolted, is provided with draw bar 402, and 402 one end of draw bar both passes through axis
It is bolted to 301 circular hole of balance plate and is provided with connecting plate 6；6 top of connecting plate and 301 top through hole of longitudinal balance plate
Electric cylinder C601 is set by bolt and moves connection, draw bar 402 can be driven to move axially by the way that connecting plate 6 is arranged.
Wherein, two groups of raised lines 401 are arranged in the equal integral type of 4 opening inside bottom of towing tank；The opening of towing tank 4 turning point is set
It is set to connecting shaft structure, and towing plate 5 is movably set with by shaft in connecting shaft structure；Pass through bolt at 4 inner side end of towing tank
It is fixedly installed electric cylinder A403, and push-and-pull rocking bar 404 is arranged by bolt for the outer end electric cylinder A403 and the movement of towing plate 5 connects
It connects, the rotation closure of towing plate 5 can flexibly be driven by setting push-and-pull rocking bar 404.
Wherein, 5 quantity of towing plate is set as two groups, and towing plate 5 can be rotated by 90 ° splicing by connecting shaft structure；Towing plate 5
Stitching portion is respectively set to bevel structure, and when inclined-plane is located at the control starting of the outer electric cylinder A403 of one group of towing plate 5 of inner end
Between earlier than another group of towing plate 5 and its interlink electric cylinder A403, can be with rotating closed towing plate 5 by setting electric cylinder A403.
Wherein, 5 height of towing plate is lower than the open height of towing tank 4, and 5 reverse side of towing plate be rotated by 90 ° after can be with
The contact of 401 side surface of raised line；The equal integral type of 5 inside bottom of towing plate is provided with protrusion globoidal structure；5 two sides back of towing plate is equal
Integral type is provided with socket 501, and 5 side of towing plate is bolted and is provided with electric cylinder B502；The outer end electric cylinder B502
It is bolted and is provided with cutting 503, and cutting 503 is interspersed in one group of socket 501 by clearance fit, inserted by being arranged
Item 503 can fix two groups of towing plates 5 and be reinforced.
Wherein, 4 bottom of towing tank, which is bolted, is provided with multiple groups electrohydraulic cylinder, and electrohydraulic cylinder bottom passes through
Bolt is fixedly installed auxiliary movable board 405；405 bottom of auxiliary movable board, which is bolted, is provided with multiple groups pulley, passes through
Auxiliary movable board 405, which is arranged, can provide the elevating function of auxiliary for towing tank 4.
Wherein, the equal integral type in 6 bottom of connecting plate is provided with electrohydraulic cylinder, and 6 bottom electrohydraulic cylinder of connecting plate with it is auxiliary
It helps the range of lift of 405 overhead electric hydraulic cylinder of movable plate consistent with speed, may be implemented to be lifted by the way that electrohydraulic cylinder is arranged
The lifting of frame 3.
The specifically used mode and effect of the present embodiment: in the present invention, side wall inside groove is opened up inside 1 two sides of tractor
101, lifting groove 102 is opened up in 101 top side of side wall inside groove, is bolted setting in the intermediate outer end of side wall inside groove 101
Towing tank 4 is set in side wall inside groove 101, in 3 one lateral roof of lifting frame by inside mounting plate 2 by the limit of inside mounting plate 2
Two groups of accessory plates 302 are arranged in integral type, are bolted setting among 1 inside top of 302 bottom of accessory plate and tractor
Two groups of telescopic rods；In 3 front end integral type of lifting frame, two groups of cambered surface vertical blocks are set, it is axial flat in the setting of 3 two sides integral type of lifting frame
Weigh plate 301, opens up circular hole in 301 outer end bottom of longitudinal balance plate, opens up four groups of through-holes on 301 circular hole top of longitudinal balance plate；
It is bolted setting draw bar 402 in 4 inner end of towing tank, it is logical across 301 circular hole of longitudinal balance plate in 402 one end of draw bar
Bolt fixed setting connecting plate 6 is crossed, is arranged by bolt at the top of connecting plate 6 with 301 top through hole of longitudinal balance plate electronic
Cylinder C601 movement connection；Two groups of raised lines 401 are set in 4 opening inside bottom integral type of towing tank, is open and transfers in towing tank 4
Place is set as connecting shaft structure, and towing plate 5 is arranged by shaft activity in connecting shaft structure, passes through at 4 inner side end of towing tank
Electric cylinder A403 is fixedly installed in bolt, and push-and-pull rocking bar 404 is arranged by bolt in the outer end electric cylinder A403 and the movement of towing plate 5 connects
It connects；Splicing is rotated by 90 ° by connecting shaft structure in towing plate 5, bevel structure is respectively set in 5 stitching portion of towing plate, passes through control
The control for the outer electric cylinder A403 of one group of towing plate 5 that device processed makes inclined-plane be located at inner end starts earlier than another group towing plate 5 of time
And its interlink electric cylinder A403；It is contacted after 5 reverse side of towing plate is rotated by 90 ° with 401 side surface of raised line, in towing plate 5
Side bottom integral type setting protrusion globoidal structure；It is bolted setting multiple groups electrohydraulic cylinder in 4 bottom of towing tank, in electricity
Hydrodynamic pressure cylinder bottom portion is bolted setting auxiliary movable board 405, is bolted setting in 405 bottom of auxiliary movable board
Multiple groups pulley；Electrohydraulic cylinder is set in 6 bottom integral type of connecting plate, in 6 bottom electrohydraulic cylinder of connecting plate and special operations
The range of lift of 405 overhead electric hydraulic cylinder of plate is consistent with speed；In use, two groups of towing plates 5 are resetted income towing tank 4
Interior, reversing withstands on aircraft nose wheel at 3 arc structure of lifting frame, and starting electric cylinder A403 promotes push-and-pull rocking bar 404 by towing plate 5
It is rotated by 90 ° closure, cutting 503 is interspersed in one group of socket 501 by starting electric cylinder B502 by clearance fit, by two groups of tractions
Plate 5, which is stablized, to be fixed；Starting electric cylinder C601 drives towing tank 4 to move axially, and aircraft nose wheel is fixed, and starts lifting frame 3
Lifting frame 3 and towing tank 4 are jacked up with the hydraulic cylinder of 4 bottom of towing tank, while aircraft nose wheel being lifted, makes the front branch of aircraft
Point is located at tractor vehicle body, and tethered sliding can be carried out by driving tractor.
The embodiment of the present invention is given for the purpose of illustration and description, and is not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Selecting and describe embodiment is and to make those skilled in the art to more preferably illustrate the principle of the present invention and practical application
It will be appreciated that the present invention is to design various embodiments suitable for specific applications with various modifications.
Claims (8)
1. the operating mechanism of the tractor in airfield ground support equipment, for drawing aircraft to navigation channel, which is characterized in that
It include: tractor (1), side wall inside groove (101), lifting groove (102), inside mounting plate (2), lifting frame (3), longitudinal balance plate
(301), accessory plate (302), towing tank (4), raised line (401), draw bar (402), electric cylinder A(403), it pushes and pulls rocking bar (404),
Auxiliary movable board (405), towing plate (5), socket (501), electric cylinder B(502), cutting (503), connecting plate (6) and electric cylinder C
(601)；It is offered side wall inside groove (101) inside tractor (1) two sides, and side wall inside groove (101) top side is opened
Equipped with lifting groove (102)；The intermediate outer end of the side wall inside groove (101), which is bolted, is provided with inside mounting plate (2), and
Towing tank (4) is set in side wall inside groove (101) by inside mounting plate (2) limit；(3) one lateral roof one of lifting frame
Body formula is provided with two groups of accessory plates (302), and solid by bolt among accessory plate (302) bottom and tractor (1) inside top
Surely two groups of telescopic rods are provided with.
2. the operating mechanism of the tractor in airfield ground support equipment according to claim 1, which is characterized in that described
Lifting frame (3) front end integral type is provided with two groups of cambered surface vertical blocks；The equal integral type in lifting frame (3) two sides is provided with longitudinal balance
Plate (301), and longitudinal balance plate (301) outer end bottom offers circular hole；It opens on longitudinal balance plate (301) the circular hole top
Equipped with four groups of through-holes.
3. the operating mechanism of the tractor in airfield ground support equipment according to claim 1, which is characterized in that described
Towing tank (4) inner end, which is bolted, to be provided with draw bar (402), and draw bar (402) one end both passes through longitudinal balance
Plate (301) circular hole, which is bolted, is provided with connecting plate (6)；At the top of the connecting plate (6) and at the top of longitudinal balance plate (301)
Electric cylinder C(601 is arranged by bolt in through hole) movement connection.
4. the operating mechanism of the tractor in airfield ground support equipment according to claim 1, which is characterized in that described
Two groups of raised lines (401) are arranged in the equal integral type of towing tank (4) opening inside bottom；Towing tank (4) opening turning point setting
For connecting shaft structure, and towing plate (5) are movably set with by shaft in connecting shaft structure；Lead at towing tank (4) inner side end
Cross bolt and be fixedly installed electric cylinder A(403), and electric cylinder A(403) outer end is arranged push-and-pull by bolt and rocking bar (404) and leads
Corbel back slab (5) movement connection.
5. the operating mechanism of the tractor in airfield ground support equipment according to claim 1, which is characterized in that described
Towing plate (5) quantity is set as two groups, and towing plate (5) can be rotated by 90 ° splicing by connecting shaft structure；The towing plate (5) is spelled
The place of connecing is respectively set to bevel structure, and inclined-plane is located at one group of outer electric cylinder A(403 of towing plate (5) of inner end) control starting
Earlier than another group towing plate (5) of time and its interlink electric cylinder A(403).
6. the operating mechanism of the tractor in airfield ground support equipment according to claim 1, which is characterized in that described
Towing plate (5) highly be lower than towing tank (4) open height, and towing plate (5) reverse side be rotated by 90 ° after can be with raised line
(401) side surface contacts；The equal integral type of towing plate (5) inside bottom is provided with protrusion globoidal structure；The towing plate (5)
The equal integral type in two sides back is provided with socket (501), and towing plate (5) side is bolted and is provided with electric cylinder B
(502)；The electric cylinder B(502) outer end is bolted and is provided with cutting (503), and cutting (503) passes through clearance fit
It is interspersed in one group of socket (501).
7. the operating mechanism of the tractor in airfield ground support equipment according to claim 1, which is characterized in that described
Towing tank (4) bottom, which is bolted, is provided with multiple groups electrohydraulic cylinder, and electrohydraulic cylinder bottom is bolted and sets
It is equipped with auxiliary movable board (405)；Auxiliary movable board (405) bottom, which is bolted, is provided with multiple groups pulley.
8. the operating mechanism of the tractor in airfield ground support equipment according to claim 1, which is characterized in that described
The equal integral type in connecting plate (6) bottom is provided with electrohydraulic cylinder, and connecting plate (6) bottom electrohydraulic cylinder and auxiliary movable board
(405) range of lift of overhead electric hydraulic cylinder is consistent with speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154987.5A CN109703774A (en) | 2019-03-01 | 2019-03-01 | The operating mechanism of tractor in airfield ground support equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154987.5A CN109703774A (en) | 2019-03-01 | 2019-03-01 | The operating mechanism of tractor in airfield ground support equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109703774A true CN109703774A (en) | 2019-05-03 |
Family
ID=66265969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910154987.5A Withdrawn CN109703774A (en) | 2019-03-01 | 2019-03-01 | The operating mechanism of tractor in airfield ground support equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109703774A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114455091A (en) * | 2021-12-26 | 2022-05-10 | 中航天水飞机工业有限责任公司 | General aircraft tractor |
| CN114506467A (en) * | 2021-12-27 | 2022-05-17 | 江苏靖江叉车有限公司 | Electric tractor with hidden protector for airport |
-
2019
- 2019-03-01 CN CN201910154987.5A patent/CN109703774A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114455091A (en) * | 2021-12-26 | 2022-05-10 | 中航天水飞机工业有限责任公司 | General aircraft tractor |
| CN114455091B (en) * | 2021-12-26 | 2023-08-29 | 中航天水飞机工业有限责任公司 | General aircraft tractor |
| CN114506467A (en) * | 2021-12-27 | 2022-05-17 | 江苏靖江叉车有限公司 | Electric tractor with hidden protector for airport |
| CN114506467B (en) * | 2021-12-27 | 2022-12-30 | 江苏靖江叉车有限公司 | Electric tractor with hidden protector for airport |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190503 |
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| WW01 | Invention patent application withdrawn after publication |