CN210598982U - Overturning working platform and tunneling equipment - Google Patents
Overturning working platform and tunneling equipment Download PDFInfo
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- CN210598982U CN210598982U CN201921462974.6U CN201921462974U CN210598982U CN 210598982 U CN210598982 U CN 210598982U CN 201921462974 U CN201921462974 U CN 201921462974U CN 210598982 U CN210598982 U CN 210598982U
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- 230000005641 tunneling Effects 0.000 title claims abstract description 24
- 230000007306 turnover Effects 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 2
- 230000002441 reversible effect Effects 0.000 claims 11
- 238000010276 construction Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model provides a upset work platform and tunnelling equipment. Wherein, upset work platform includes: the main platform can be rotatably arranged relative to the machine body of the tunneling equipment; the overturning driving piece is connected with the main platform; the overturning platform is rotatably connected with the main platform, and the overturning driving piece is in driving connection with the overturning platform and drives the overturning platform to rotate relative to the main platform; the telescopic driving piece is connected with the overturning platform; the telescopic platform is connected with the overturning platform in a telescopic mode and synchronously rotates with the overturning platform, the telescopic driving piece is connected with the telescopic platform in a driving mode, the telescopic platform is driven to stretch out or retract into the overturning platform, and the size of the bearing area formed by the overturning platform and the telescopic platform is changed. The utility model provides a constructor among the prior art construct inconvenient problem in the tunnel.
Description
Technical Field
The utility model relates to a coal mining equipment technical field particularly, relates to a upset work platform and heading equipment.
Background
At present, the underground coal mine roadway tunneling process comprises the following steps: firstly, cutting construction is carried out by using tunneling equipment such as a tunneling machine, after the cutting is carried out for a certain distance, supporting construction such as steel belts, net laying, anchor rods and anchor cables is carried out, and during the supporting construction, because the roadway is high in height, constructors need to build temporary supports, and the constructors are inconvenient to work on the temporary supports, are not safe and are low in efficiency.
SUMMERY OF THE UTILITY MODEL
A primary object of the utility model is to provide a upset work platform and tunnelling equipment to solve the inconvenient problem of constructor among the prior art in the tunnel construction.
In order to achieve the above object, according to an aspect of the present invention, there is provided a turnover work platform, including: the main platform can be rotatably arranged relative to the machine body of the tunneling equipment; the overturning driving piece is connected with the main platform; the overturning platform is rotatably connected with the main platform, and the overturning driving piece is in driving connection with the overturning platform and drives the overturning platform to rotate relative to the main platform; the telescopic driving piece is connected with the overturning platform; the telescopic platform is connected with the overturning platform in a telescopic mode and synchronously rotates with the overturning platform, the telescopic driving piece is connected with the telescopic platform in a driving mode, the telescopic platform is driven to stretch out or retract into the overturning platform, and the size of the bearing area formed by the overturning platform and the telescopic platform is changed.
Furthermore, the turnover platforms are multiple and are respectively arranged on two opposite sides of the main platform.
Further, the rotation axis of the turnover platform relative to the main platform is perpendicular to the rotation axis of the main platform relative to the machine body.
Furthermore, the telescopic platforms are multiple and are arranged in one-to-one correspondence with the overturning platforms.
Furthermore, the telescopic platform and the main platform are respectively positioned on two opposite sides of the overturning platform.
Further, the main platform, the overturning platform and the telescopic platform are arranged in a collinear manner.
Further, the turnover working platform further comprises a rotating assembly, the rotating assembly is connected with the main platform and connected with the machine body, and the rotating assembly drives the main platform to rotate relative to the machine body.
Further, the tumble drive and/or the telescopic drive are hydraulic drives.
Furthermore, the overturning working platform further comprises a control system connected with the overturning driving piece and the telescopic driving piece, and the control system controls the actions of the overturning driving piece and the telescopic driving piece so as to control the positions of the overturning platform and the telescopic platform.
According to the utility model discloses an on the other hand provides a heading equipment, including organism and foretell upset work platform, upset work platform installs the cutting units department at the organism.
Use the technical scheme of the utility model, through being provided with upset platform and flexible platform, the two and main platform cooperation of upset platform and flexible platform, the whole area of platform is great, satisfy the needs that the staff carries out the operation above that, the rotation angle of upset platform can be adjusted wantonly and the locking, the height of upset platform can be adjusted as required, the adjustment of upset platform is simple, high durability and convenient use, and flexible platform passes through plane cooperation and upset platform sliding connection, flexible platform can be according to the flexible volume of width adjustment in tunnel, make upset work platform can cover whole tunnel. The above-mentioned mode of setting up makes the holistic area of platform big, and the staff can carry out work such as stock, anchor rope construction, going up steel band, lapping on upset work platform, and application scope is wide, and is efficient, and the security is good, and upset work platform's height, length and rotation angle isoparametric can carry out corresponding adjustment and locking according to the user demand moreover to be applicable to the tunnel of various sizes, upset work platform adjustment is simple, quick, convenient to use, and the security is high. In addition, the overturning working platform is unfolded to form a large operating platform when in use, and can be contracted to a very small size when not in use, so that the overturning working platform can be tightly attached to a cutting part of the tunneling equipment and the use of the tunneling equipment is not influenced.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a top view of the roll-over work platform of the present invention;
FIG. 2 shows a front view of the inverted work platform of FIG. 1;
figure 3 shows a schematic view of the inverted work platform of figure 1 deployed on a heading machine; and
figure 4 shows a schematic view of the inverted work platform of figure 1 when retracted on the ripping apparatus.
Wherein the figures include the following reference numerals:
10. a main platform; 20. turning over the driving piece; 30. overturning the platform; 40. a telescopic driving member; 50. a telescopic platform; 60. a rotating assembly; 70. a body.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
In order to solve the inconvenient problem of constructor in the tunnel construction among the prior art, the utility model provides a upset work platform and tunnelling equipment.
As shown in fig. 1 to 4, the turnover working platform includes a main platform 10, a turnover driving member 20, a turnover platform 30, a telescopic driving member 40, and a telescopic platform 50, wherein the main platform 10 is rotatably disposed relative to a machine body 70; the overturning driving part 20 is connected with the main platform 10; the overturning platform 30 is rotatably connected with the main platform 10, and the overturning driving member 20 is in driving connection with the overturning platform 30 and drives the overturning platform 30 to rotate relative to the main platform 10; the telescopic driving member 40 is connected with the overturning platform 30; the telescopic platform 50 is telescopically connected with the overturning platform 30 and synchronously rotates with the overturning platform 30, and the telescopic driving piece 40 is in driving connection with the telescopic platform 50 and drives the telescopic platform 50 to extend out of or retract into the overturning platform 30 so as to change the size of the bearing area formed by the overturning platform 30 and the telescopic platform 50.
This embodiment is through being provided with upset platform 30 and telescopic platform 50, the two and the main platform 10 cooperation of upset platform 30 and telescopic platform 50, the whole area of platform is great, satisfy the needs that the staff carries out the operation above that, the upset angle of upset platform 30 can be adjusted wantonly and the locking, the height of upset platform 30 can be adjusted as required, upset platform 30 adjustment is simple, high durability and convenient use, telescopic platform 50 passes through plane cooperation and the platform 30 sliding connection that overturns, telescopic platform 50 can be according to the flexible volume of width adjustment in tunnel, make upset work platform can cover whole tunnel. The above-mentioned mode of setting up makes the holistic area of platform big, and the staff can carry out work such as stock, anchor rope construction, going up steel band, lapping on upset work platform, and application scope is wide, and is efficient, and the security is good, and upset work platform's height, length and rotation angle isoparametric can carry out corresponding adjustment and locking according to the user demand moreover to be applicable to the tunnel of various sizes, upset work platform adjustment is simple, quick, convenient to use, and the security is high. In addition, the overturning working platform is unfolded to form a large operating platform when in use, and can be contracted to a very small size when not in use, so that the overturning working platform can be tightly attached to a cutting part of the tunneling equipment and the use of the tunneling equipment is not influenced.
In this embodiment, upset platform 30 is a plurality of, each upset platform 30 sets up respectively in the both sides that main platform 10 is relative, through the hinge between upset platform 30 and the main platform 10, the round pin axle realizes pivotal connection, this embodiment is provided with two upset platforms 30, and along the direction that heading equipment gos forward, two upset platforms 30 are located the main platform 10 left and right sides respectively, thereby the coverage area of upset work platform in the tunnel has been increased, upset platform 30 can the tilting, its angle can carry out corresponding adjustment as required, thereby be convenient for the staff can carry out work such as stock on upset work platform, the anchor rope construction, go up the steel band, the lapping.
Preferably, the axis of rotation of the flipping platform 30 relative to the main platform 10 is perpendicular to the axis of rotation of the main platform 10 relative to the body 70. Specifically, the turning platform 30 is horizontal to the rotation axis of the main platform 10 and parallel to the advancing direction of the heading machine, and the rotation axis of the main platform 10 is horizontal to the machine body 70 and perpendicular to the advancing direction of the heading machine, so that the height and angle of the turning platform can be adjusted in all directions by rotating in two directions, and the position of the turning platform is helpful for the work of workers.
In this embodiment, a plurality of telescopic platforms 50 are also provided, and are provided in one-to-one correspondence with the turning platforms 30. The telescopic platform 50 and the main platform 10 are respectively located at two opposite sides of the turning platform 30, namely the telescopic platform 50 is located at one side of the turning platform 30 far away from the main platform 10, the distance that the telescopic platform 50 extends out of the turning platform 30 can be adjusted as required, the arrangement of the telescopic platform 50 further increases the area of the turning working platform on one hand, so that the length of the turning working platform can be as close as possible to the width of a roadway, as shown in fig. 3, the turning working platform can cover the width of the whole roadway, and a worker can complete various works at various positions on the turning working platform, on the other hand, the telescopic arrangement enables the turning working platform to be unfolded when in use, and the telescopic platform 50 can be retracted when not in use, the turning platform 30 is turned downwards to be tightly attached to the machine body 70, as shown in fig. 4, the turning working platform can be retracted to, the cutting part of the tunneling equipment can be tightly attached, so that the occupied space when the turnover working platform is stored is reduced, and the influence on the working of the tunneling equipment is reduced.
Collineation setting between main platform 10, two upset platforms 30 and two telescopic platform 50 of this embodiment, and the straight line that forms is the length direction of upset work platform promptly, also is the width direction in tunnel to guarantee the area covered to the tunnel. Of course, the number of the turning platforms 30 and the number of the telescopic platforms 50 may be increased or decreased as required, for example, one turning platform 30 and one telescopic platform 50 may be provided only on one side of the main platform 10, or the telescopic platform 50 may be additionally provided on one side of the turning platform 30 that is advanced or retracted toward the heading device.
In this embodiment, the turnover working platform further includes a rotating component 60, the main platform 10 is configured to be a concave structure, the rotating component 60 is installed at the notch of the concave structure, and is connected to both the main platform 10 and the machine body 70, and the rotating component 60 drives the main platform 10 to rotate relative to the machine body 70, so as to adjust the height of the turnover working platform.
Preferably, the overturning driving part 20 and the telescopic driving part 40 are hydraulic driving parts, the overturning platform 30 and the telescopic platform 50 are driven to move by a hydraulic oil cylinder, a power system of the tunneling device is used, the hydraulic driving structure is simple, stable and reliable, and the overturning platform 30 and the telescopic platform 50 can be locked at the adjusted positions. Because the present embodiment is provided with two overturning platforms 30 and two telescopic platforms 50, the overturning driving member 20 and the telescopic driving member 40 are respectively provided with four and two pairs of driving members, two sides of each overturning platform 30 are respectively connected with one overturning driving member 20, and two sides of each telescopic platform 50 are respectively connected with one telescopic driving member 40, so as to ensure the driving stability and reliability. Of course, the number and arrangement positions of the tumble drive member 20 and the telescopic drive member 40 may be changed accordingly as needed.
In this embodiment, the flipping platform further includes a control system connected to the flipping driving unit 20, the telescopic driving unit 40 and the rotating assembly 60, the control system includes a hydraulic system, an electrical system, etc., and the control system controls the actions of the flipping driving unit 20, the telescopic driving unit 40 and the rotating assembly 60, so as to control the positions of the main platform 10, the flipping platform 30 and the telescopic platform 50.
The turnover working platform can be arranged on various tunneling devices such as a tunneling machine and an anchor driving machine, and is wide in application range.
The embodiment also provides tunneling equipment, which comprises a machine body 70 and the overturning working platform, wherein the overturning working platform is installed at the cutting part of the machine body 70. When the turnover working platform is not used, the turnover working platform is retracted and the size of the turnover working platform is not larger than that of the cutting part.
It should be noted that, a plurality in the above embodiments means at least two.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
1. the problem that constructors are inconvenient to construct in a roadway in the prior art is solved;
2. the platform area is large, workers can carry out anchor rod and anchor cable construction, steel belt feeding, net laying and other work on the overturning working platform, the application range is wide, the efficiency is high, and the safety is good;
3. the height, the length and the turning angle can be adjusted and locked at will, and the device is suitable for roadways with various sizes;
4. when the turnover working platform is not used, the turnover working platform can be contracted to a very small size and can be tightly attached to a cutting part of the tunneling equipment, so that the use of the tunneling equipment is not influenced;
5. the hydraulic oil cylinder is used for driving, and the power system of the tunneling equipment is used as the power system, so that the structure is simple;
6. the device can be installed on various tunneling devices such as a tunneling machine, a tunneling and anchoring machine and the like, and has a wide application range.
It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A flipping work platform, comprising:
the main platform (10), the main platform (10) is rotatably arranged relative to the body of the tunneling device;
a turnover drive (20), the turnover drive (20) being connected to the main platform (10);
the overturning platform (30), the overturning platform (30) is rotatably connected with the main platform (10), and the overturning driving part (20) is in driving connection with the overturning platform (30) and drives the overturning platform (30) to rotate relative to the main platform (10);
the telescopic driving piece (40), the telescopic driving piece (40) is connected with the overturning platform (30);
flexible platform (50), flexible platform (50) with upset platform (30) telescopic connection, and with upset platform (30) rotate in step, flexible driving piece (40) with flexible platform (50) drive is connected, and drives flexible platform (50) stretch out or retract upset platform (30), in order to change upset platform (30) with the size of the area of accepting that flexible platform (50) formed.
2. A reversible work platform according to claim 1, characterized in that said reversible work platform (30) is provided in plurality, each of said reversible work platform (30) being arranged on opposite sides of said main platform (10).
3. A reversible work platform according to claim 2, characterized in that the axis of rotation of the reversible platform (30) with respect to the main platform (10) is mutually perpendicular to the axis of rotation of the main platform (10) with respect to the machine body.
4. A reversible work platform according to claim 2, characterized in that said telescopic platform (50) is provided in plurality and in one-to-one correspondence with said reversible platform (30).
5. A workbench according to claim 4, wherein said telescopic platform (50) and said main platform (10) are respectively located on opposite sides of said flipping platform (30).
6. A reversible work platform according to claim 1, characterized in that said main platform (10), said reversible platform (30) and said telescopic platform (50) are arranged in line.
7. A reversible work platform according to claim 1, characterized in that it further comprises a rotation assembly (60), said rotation assembly (60) being connected to said main platform (10) and to said machine body, said rotation assembly (60) driving said main platform (10) in rotation with respect to said machine body.
8. A roll-over work platform according to claim 1, characterized in that the roll-over drive (20) and/or the telescopic drive (40) is a hydraulic drive.
9. A roll-over work platform according to claim 1, characterized in that it further comprises a control system connected to the roll-over drive (20) and the telescopic drive (40), said control system controlling the action of the roll-over drive (20) and the telescopic drive (40) to control the position of the roll-over platform (30) and the telescopic platform (50).
10. A heading device, characterized by comprising a machine body (70) and a reversible work platform according to any of claims 1 to 9 mounted at the cutting section of the machine body (70).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921462974.6U CN210598982U (en) | 2019-09-04 | 2019-09-04 | Overturning working platform and tunneling equipment |
| AU2020102656A AU2020102656A4 (en) | 2019-09-04 | 2020-07-03 | Turnover working platform and tunneling device |
| PCT/CN2020/100121 WO2021042858A1 (en) | 2019-09-04 | 2020-07-03 | Overturning working platform and tunneling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921462974.6U CN210598982U (en) | 2019-09-04 | 2019-09-04 | Overturning working platform and tunneling equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210598982U true CN210598982U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921462974.6U Active CN210598982U (en) | 2019-09-04 | 2019-09-04 | Overturning working platform and tunneling equipment |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN210598982U (en) |
| AU (1) | AU2020102656A4 (en) |
| WO (1) | WO2021042858A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021042858A1 (en) * | 2019-09-04 | 2021-03-11 | 廊坊景隆重工机械有限公司 | Overturning working platform and tunneling equipment |
| CN114623738A (en) * | 2022-03-10 | 2022-06-14 | 中铁上海工程局集团有限公司 | Tunnel walking type powder charging trolley |
| CN116201562A (en) * | 2023-03-08 | 2023-06-02 | 廊坊景隆重工机械有限公司 | Working platform for fan-shaped linkage unfolding |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761659A (en) * | 2020-12-28 | 2021-05-07 | 中国煤炭科工集团太原研究院有限公司 | Telescopic platform device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3515011A1 (en) * | 1985-04-25 | 1986-10-30 | KBI Klöckner-Becorit Industrietechnik GmbH, 4224 Hünxe | Multi-purpose scaffold for through-building works underground |
| CN203362174U (en) * | 2013-06-01 | 2013-12-25 | 安徽恒源煤电股份有限公司钱营孜煤矿 | Operation platform for coal mine roadway shed erection |
| CN207715163U (en) * | 2018-01-09 | 2018-08-10 | 中交城市轨道交通设计研究院有限公司 | A kind of fabricated construction assembly sliding contact formula movement supporting platform |
| CN109899095B (en) * | 2019-03-04 | 2020-08-04 | 湖南生物机电职业技术学院 | Multi-platform arch-erecting vehicle |
| CN110080791B (en) * | 2019-05-14 | 2024-06-14 | 中国铁建重工集团股份有限公司 | Small-diameter tunnel boring machine |
| CN210598982U (en) * | 2019-09-04 | 2020-05-22 | 廊坊景隆重工机械有限公司 | Overturning working platform and tunneling equipment |
-
2019
- 2019-09-04 CN CN201921462974.6U patent/CN210598982U/en active Active
-
2020
- 2020-07-03 AU AU2020102656A patent/AU2020102656A4/en active Active
- 2020-07-03 WO PCT/CN2020/100121 patent/WO2021042858A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021042858A1 (en) * | 2019-09-04 | 2021-03-11 | 廊坊景隆重工机械有限公司 | Overturning working platform and tunneling equipment |
| CN114623738A (en) * | 2022-03-10 | 2022-06-14 | 中铁上海工程局集团有限公司 | Tunnel walking type powder charging trolley |
| CN116201562A (en) * | 2023-03-08 | 2023-06-02 | 廊坊景隆重工机械有限公司 | Working platform for fan-shaped linkage unfolding |
| CN116201562B (en) * | 2023-03-08 | 2023-10-24 | 廊坊景隆重工机械有限公司 | Working platform for fan-shaped linkage unfolding |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2020102656A4 (en) | 2020-12-10 |
| WO2021042858A1 (en) | 2021-03-11 |
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Address after: 065300 Gongye 2nd Road, Chaobaihe Industrial Zone, Dachang County, Langfang City, Hebei Province Patentee after: Hebei Jinglong Intelligent Equipment Co.,Ltd. Address before: 065300 Gongye 2nd Road, Chaobaihe Industrial Zone, Dachang County, Langfang City, Hebei Province Patentee before: LANGFANG JINGLONG HEAVY MACHINERY Co.,Ltd. |