CN112607619A - Mechanical lifting type engineering machinery transfer device - Google Patents

Mechanical lifting type engineering machinery transfer device Download PDF

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Publication number
CN112607619A
CN112607619A CN202011536325.3A CN202011536325A CN112607619A CN 112607619 A CN112607619 A CN 112607619A CN 202011536325 A CN202011536325 A CN 202011536325A CN 112607619 A CN112607619 A CN 112607619A
Authority
CN
China
Prior art keywords
fixedly connected
driving
hoist
sides
base
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
Application number
CN202011536325.3A
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Chinese (zh)
Inventor
刘峻
朱敏红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGHAI POLYTECHNIC COLLEGE
Original Assignee
JIANGHAI POLYTECHNIC COLLEGE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JIANGHAI POLYTECHNIC COLLEGE filed Critical JIANGHAI POLYTECHNIC COLLEGE
Priority to CN202011536325.3A priority Critical patent/CN112607619A/en
Publication of CN112607619A publication Critical patent/CN112607619A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/16Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/64Jibs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/72Counterweights or supports for balancing lifting couples
    • B66C23/78Supports, e.g. outriggers, for mobile cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/84Slewing gear

Abstract

The invention discloses a mechanical lifting type engineering machinery transfer device, which belongs to the field of mechanical equipment and comprises a base, wherein the top of the base is rotatably connected with a support column, the top end of the support column is fixedly connected with a support frame, the top of the support frame is fixedly connected with a hydraulic telescopic column, the top end of the hydraulic telescopic column is fixedly connected with a driving cross beam, a driving groove is formed in the driving cross beam, and a partition plate is fixedly connected between the right side of the top of the inner wall of the driving cross beam and the right side of the bottom of the inner wall. The device can be simply and conveniently hoisted and installed by installing the first hoisting rod, the second hoisting rod and the hoisting hook, the subsequent movement is convenient, the movement of the device can be simply and quickly adjusted through the combined action of the hydraulic telescopic column and the driving beam, the device can be accurately moved to a specified place, the weight of the device can be effectively shared through the combined action of the support frame, the bearing guide wheel and the positioning guide rail, and the device can be better protected.

Description

Mechanical lifting type engineering machinery transfer device
Technical Field
The invention relates to the field of mechanical equipment, in particular to a mechanical lifting type engineering machinery transfer device.
Background
The engineering machinery is an important component of equipment industry, and in general terms, all the mechanical equipment required by earth and stone construction engineering, pavement construction and maintenance, mobile lifting loading and unloading operation and various comprehensive mechanical construction engineering required by various building engineering is called as engineering machinery, various mechanical equipment is rapidly developed along with the maturity of the mechanical equipment technology in China, and the equipment needs to be transported from one position to another position when being used in some occasions, and the equipment needs to be transported by a transporting mechanical device because manual transportation is difficult, but the existing technology generally uses a forklift, a crane or a crane and other large-scale equipment for position movement, but the forklift can only carry out position movement on the equipment with certain weight, and the crane or the crane cannot carry out position movement on the large-scale equipment in some occasions.
The prior art generally adopts large-scale equipment such as fork truck to remove and carry, and the operation mode is comparatively troublesome, and the place of using is limited moreover, has increased the transfer cost to a certain extent, and can not remove at any time as required, and the shift position is not accurate, brings inconvenience for the construction, has certain limitation.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to provide a mechanical lifting type engineering machinery transfer device which can effectively, conveniently and quickly carry equipment, can move at any time and is convenient to move.
2. Technical scheme
In order to solve the problems, the invention adopts the following technical scheme:
a mechanical lifting type engineering machinery transfer device comprises a base, wherein a support column is rotatably connected to the top of the base, a support frame is fixedly connected to the top end of the support column, a hydraulic telescopic column is fixedly connected to the top of the support frame, a driving cross beam is fixedly connected to the top end of the hydraulic telescopic column, a driving groove is formed in the driving cross beam, a partition plate is fixedly connected between the right side of the top of the inner wall of the driving cross beam and the right side of the bottom of the inner wall, a driving lead screw is rotatably connected between the left side of the inner wall of the driving cross beam and the left side of the partition plate, the right end of the driving lead screw penetrates through the partition plate and extends to the outside of the partition plate, a driving motor is fixedly connected to the right side of the bottom of the inner wall of the driving cross beam, the output end of the driving motor is, the bottom fixedly connected with hoist and mount board of connecting rod, the both sides of hoist and mount board bottom all rotate and are connected with first hoist and mount pole, the bottom fixedly connected with second hoist and mount pole of first hoist and mount pole, the bottom fixedly connected with hoist and mount couple of second hoist and mount pole, the bottom of first hoist and mount pole and the equal fixedly connected with installation piece in left side of second hoist and mount pole, two fixedly connected with spring between the installation piece.
Preferably, the two sides of the bottom of the support frame are both provided with mounting grooves, the two sides of the top of the base are both fixedly connected with positioning slide rails, the two sides of the inner wall of each mounting groove are fixedly connected with bearing guide wheels through bearings, and the bearing guide wheels are matched with the positioning slide rails.
Preferably, the universal wheels are fixedly connected to two sides of the bottom of the base, and the supporting legs are fixedly connected to two sides of the bottom of the base.
Preferably, the equal fixedly connected with fixed block in both sides at carriage top, the solid fixed ring of fixed surface connection of hydraulic telescoping post, equal fixedly connected with bracing piece between the both sides of solid fixed ring and the top of two fixed blocks.
Preferably, the surface of support column just is located the bottom fixedly connected with adjusting gear of support frame, the right side fixedly connected with adjusting motor at base top, adjusting motor's output fixedly connected with drive gear, drive gear meshes with adjusting gear mutually.
Preferably, the number of the first hoisting rod and the second hoisting rod is four, and the bottom of the driving beam is provided with a moving groove.
3. Advantageous effects
(1) According to the invention, the first hoisting rods are rotatably connected to two sides of the bottom of the hoisting plate, the second hoisting rod is fixedly connected to the bottom end of the first hoisting rod, the hoisting hook is fixedly connected to the bottom end of the second hoisting rod, and the installation blocks are fixedly connected to the bottom of the first hoisting rod and the left side of the second hoisting rod, so that equipment needing to be moved can be simply and conveniently hoisted and installed, and subsequent movement is facilitated.
(2) The invention is characterized in that a hydraulic telescopic column is fixedly connected with the top of a supporting frame, a driving beam is fixedly connected with the top end of the hydraulic telescopic column, a driving groove is arranged in the driving beam, a partition plate is fixedly connected between the right side of the top of the inner wall of the driving beam and the right side of the bottom of the inner wall, a driving lead screw is rotatably connected between the left side of the inner wall of the driving beam and the left side of the partition plate, the right end of the driving lead screw penetrates through the partition plate and extends to the outside of the partition plate, a driving motor is fixedly connected with the right side of the bottom of the inner wall of the driving beam, the output end of the driving motor is fixedly connected with the right end of the driving lead screw, a lead screw sliding block is connected onto the driving lead screw in a threaded manner, a connecting rod is fixedly, descend the flexible post of hydraulic pressure, hoist equipment through the hoist and mount couple afterwards, after fixed finishing, the flexible post of hydraulic pressure rises again, hoists equipment, afterwards remove to the target location can, can be simple and convenient remove the transfer to equipment, adjust the height of the flexible post of hydraulic pressure and the position of hoist and mount board according to specific position demand to can be with the accurate removal of equipment to appointed place.
(3) According to the invention, the two sides of the bottom of the support frame are respectively provided with the mounting groove, the two sides of the top of the base are respectively and fixedly connected with the positioning slide rail, the two sides of the inner wall of the mounting groove are respectively and fixedly connected with the bearing guide wheel through the bearing, the bearing guide wheel is matched with the positioning slide rail, the support frame drives the bearing guide wheel to rotate in the rotating process, the bearing guide wheel moves in the positioning slide rail, the bearing guide wheel plays a role in supporting the support frame, the pressure of the support frame on the support column can be shared, the equipment can be better protected, and.
(4) According to the invention, the two sides of the top of the support frame are fixedly connected with the fixed blocks, the surface of the hydraulic telescopic column is fixedly connected with the fixed ring, the two sides of the fixed ring and the tops of the two fixed blocks are fixedly connected with the supporting rods, and the mounting blocks, the supporting rods and the fixed ring can play a role in supporting and fixing the hydraulic telescopic column under the combined action, so that the hydraulic telescopic column is prevented from being damaged when equipment with overlarge hoisting quality is hoisted.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of a mechanical lift-type engineering machine transfer device provided in the present invention;
FIG. 2 is a top view of the construction of the hanger plate of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
fig. 4 is a partially enlarged schematic view of a portion B shown in fig. 1.
Reference numerals: 1. a base; 2. a support pillar; 3. a support frame; 4. a hydraulic telescopic column; 5. a drive beam; 6. a drive slot; 7. a partition plate; 8. driving the screw rod; 9. a drive motor; 10. a screw rod slide block; 11. a connecting rod; 12. hoisting the plate; 13. a first hoisting rod; 14. a second hoisting rod; 15. hoisting a hook; 16. mounting blocks; 17. a spring; 18. mounting grooves; 19. positioning the slide rail; 20. a bearing guide wheel; 21. a universal wheel; 22. supporting legs; 23. a fixed block; 24. a fixing ring; 25. a support bar; 26. an adjusting gear; 27. adjusting the motor; 28. a drive gear; 29. the slot is moved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an embodiment of the present invention is shown: a mechanical lifting type engineering machinery transfer device comprises a base 1, wherein the top of the base 1 is rotatably connected with a support column 2, the top end of the support column 2 is fixedly connected with a support frame 3, the top of the support frame 3 is fixedly connected with a hydraulic telescopic column 4, the top end of the hydraulic telescopic column 4 is fixedly connected with a driving cross beam 5, a driving groove 6 is formed in the driving cross beam 5, a partition 7 is fixedly connected between the right side of the top of the inner wall of the driving cross beam 5 and the right side of the bottom of the inner wall, a driving screw rod 8 is rotatably connected between the left side of the inner wall of the driving cross beam 5 and the left side of the partition 7, the right end of the driving screw rod 8 penetrates through the partition 7 and extends to the outside of the partition 7, a driving motor 9 is fixedly connected to the right side of the bottom of the inner wall of the driving, the screw rod slider 10 is connected to the driving screw rod 8 in a threaded manner, the bottom of the screw rod slider 10 is fixedly connected with the connecting rod 11, the bottom end of the connecting rod 11 is fixedly connected with the hoisting plate 12, the two sides of the bottom of the hoisting plate 12 are both rotatably connected with the first hoisting rod 13, the bottom end of the first hoisting rod 13 is fixedly connected with the second hoisting rod 14, the bottom end of the second hoisting rod 14 is fixedly connected with the hoisting hook 15, the bottom of the first hoisting rod 13 and the left side of the second hoisting rod 14 are both fixedly connected with the mounting blocks 16, a spring 17 is fixedly connected between the two mounting blocks 16, the driving motor 9 is connected with an external power supply, the driving motor 9 is a three-phase asynchronous motor, the driving screw rod 8 is driven to rotate, the screw rod slider 10 is driven to move, the connecting rod 11 and the hoisting plate 12 are further driven to move, and before the equipment is moved, firstly, the hydraulic telescopic column 4 is required to be lowered, then the equipment is hoisted through the hoisting hook 15, after the fixation is finished, the hydraulic telescopic column 4 is hoisted again, the equipment is hoisted, and then the equipment is moved to a target position.
Mounting grooves 18 have all been seted up to the both sides of support frame 3 bottom, the equal fixedly connected with location slide rail 19 in both sides at base 1 top, through bearing fixedly connected with bearing guide pulley 20 between the both sides of mounting groove 18 inner wall, bearing guide pulley 20 and location slide rail 19 looks adaptation, support frame 3 drive bearing guide pulley 20 and rotate at the pivoted in-process, and bearing guide pulley 20 removes in location slide rail 19, and bearing guide pulley 20 plays the supporting role to support frame 3, can share support frame 3 and take the pressure for support column 2, protection equipment that can be better, the life of extension equipment.
The equal fixedly connected with universal wheel 21 in both sides of base 1 bottom, the equal fixedly connected with supporting legs 22 in both sides of base 1 bottom can be simple and convenient remove base 1 through universal wheel 21, after base 1 removed to appointed place, can put down supporting legs 22, and supporting legs 22's bottom and ground contact play certain supporting role, still can play simultaneously fixed and effect, prevent that base 1 from continuing to remove.
The equal fixedly connected with fixed block 23 in both sides at 3 tops of support frame, the solid fixed ring 24 of fixed surface of hydraulic telescoping post 4 is connected with, equal fixedly connected with bracing piece 25 between the both sides of solid fixed ring 24 and the top of two fixed blocks 23, can play support and the fixed action to hydraulic telescoping post 4 under the combined action of fixed block 23, bracing piece 25 and solid fixed ring 24, prevent to cause the damage to hydraulic telescoping post 4 when the too big equipment of hoist and mount quality.
The surface of support column 2 just is located the bottom fixedly connected with adjusting gear 26 of support frame 3, the right side fixedly connected with adjusting motor 27 at base 1 top, adjusting motor 27's output fixedly connected with drive gear 28, drive gear 28 meshes with adjusting gear 26 mutually, and adjusting motor 27 is connected with external power source, and adjusting motor 27 is three-phase asynchronous motor, and adjusting motor 27 drives drive gear 28 and rotates to drive adjusting gear 26 and rotate, drive support column 2 and support frame 3 when adjusting gear 26 rotates and rotate, and further drive hydraulic telescoping column 4 and drive crossbeam 5 rotate, thereby remove the equipment of hoist and mount completion.
The number of the first hoisting rod 13 and the second hoisting rod 14 is four, the bottom of the driving beam 5 is provided with a moving groove 29, the moving groove 29 is matched with the connecting rod 11, and the connecting rod 11 moves in the moving groove 29.
The working principle is as follows: when the device is used, firstly, the device to be moved is hoisted and installed, firstly, the hydraulic telescopic column 4 is required to descend, then, the device is hoisted through the hoisting hook 15, after the fixation is finished, the hydraulic telescopic column 4 is lifted again, the device is hoisted, then, the position of the screw rod slide block 10 is moved according to the specific position to be moved, the driving motor 9 drives the driving screw rod 8 to rotate, so as to drive the screw rod slide block 10 to move, further drive the connecting rod 11 and the hoisting plate 12 to move, then, the position of the support frame 3 is adjusted, the adjusting motor 27 drives the driving gear 28 to rotate, so as to drive the adjusting gear 26 to rotate, when the adjusting gear 26 rotates, the support column 2 and the support frame 3 are driven to rotate, further, the hydraulic telescopic column 4 and the driving beam 5 are driven to rotate, so as to move the hoisted device, after the movement is finished, the hydraulic telescopic, put equipment to ground, take off hoist and mount couple 15 from equipment, remove base 1 that can be simple and convenient with the device wholly through universal wheel 21 afterwards, after base 1 removes to appointed place, can put down supporting legs 22, the bottom and the ground contact of supporting legs 22, play certain supporting role, still can play simultaneously fixed and effect, prevent that base 1 from continuing to remove, in the use, fixed block 23, bracing piece 25 and solid fixed ring 24's combined action can play support and the fixed action to hydraulic telescoping column 4 down, prevent to cause the damage to hydraulic telescoping column 4 when the too big equipment of hoist and mount quality.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims (6)

1. The utility model provides a machinery formula engineering machine tool transfer device that rises, includes base (1), its characterized in that: the top of the base (1) is rotatably connected with a support column (2), the top end of the support column (2) is fixedly connected with a support frame (3), the top of the support frame (3) is fixedly connected with a hydraulic telescopic column (4), the top end of the hydraulic telescopic column (4) is fixedly connected with a driving cross beam (5), a driving groove (6) is formed in the driving cross beam (5), a partition plate (7) is fixedly connected between the right side of the top of the inner wall of the driving cross beam (5) and the right side of the bottom of the inner wall, a driving lead screw (8) is rotatably connected between the left side of the inner wall of the driving cross beam (5) and the left side of the partition plate (7), the right end of the driving lead screw (8) penetrates through the partition plate (7) and extends to the outside of the partition plate (7), a driving motor (9) is fixedly connected to the right side of the bottom of the inner wall of the driving, threaded connection has lead screw slider (10) on drive lead screw (8), bottom fixedly connected with connecting rod (11) of lead screw slider (10), bottom fixedly connected with hoist and mount board (12) of connecting rod (11), the both sides of hoist and mount board (12) bottom are all rotated and are connected with first hoist and mount pole (13), bottom fixedly connected with second hoist and mount pole (14) of first hoist and mount pole (13), the bottom fixedly connected with hoist and mount couple (15) of second hoist and mount pole (14), the bottom of first hoist and mount pole (13) and the equal fixedly connected with in left side of second hoist and mount pole (14) installation piece (16), two fixedly connected with spring (17) between installation piece (16).
2. The mechanical lifting type engineering machinery transfer device according to claim 1, wherein mounting grooves (18) are formed in both sides of the bottom of the support frame (3), positioning slide rails (19) are fixedly connected to both sides of the top of the base (1), a bearing guide wheel (20) is fixedly connected between both sides of the inner wall of the mounting groove (18) through a bearing, and the bearing guide wheel (20) is matched with the positioning slide rails (19).
3. The mechanical lifting type engineering machinery transfer device according to claim 1, wherein universal wheels (21) are fixedly connected to both sides of the bottom of the base (1), and supporting feet (22) are fixedly connected to both sides of the bottom of the base (1).
4. The mechanical lifting type engineering machinery transfer device according to claim 1, wherein fixing blocks (23) are fixedly connected to both sides of the top of the support frame (3), fixing rings (24) are fixedly connected to the surface of the hydraulic telescopic column (4), and support rods (25) are fixedly connected between both sides of the fixing rings (24) and the tops of the two fixing blocks (23).
5. The mechanical lifting type engineering machinery transfer device according to claim 1, characterized in that an adjusting gear (26) is fixedly connected to the surface of the supporting column (2) and located at the bottom of the supporting frame (3), an adjusting motor (27) is fixedly connected to the right side of the top of the base (1), a driving gear (28) is fixedly connected to the output end of the adjusting motor (27), and the driving gear (28) is meshed with the adjusting gear (26).
6. The mechanical lifting type engineering machinery transfer device according to claim 1, wherein the number of the first hoisting rod (13) and the second hoisting rod (14) is four, and a moving groove (29) is formed in the bottom of the driving beam (5).
CN202011536325.3A 2020-12-23 2020-12-23 Mechanical lifting type engineering machinery transfer device Pending CN112607619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011536325.3A CN112607619A (en) 2020-12-23 2020-12-23 Mechanical lifting type engineering machinery transfer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011536325.3A CN112607619A (en) 2020-12-23 2020-12-23 Mechanical lifting type engineering machinery transfer device

Publications (1)

Publication Number Publication Date
CN112607619A true CN112607619A (en) 2021-04-06

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CN202011536325.3A Pending CN112607619A (en) 2020-12-23 2020-12-23 Mechanical lifting type engineering machinery transfer device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113086861A (en) * 2021-04-16 2021-07-09 安徽明威科技发展有限公司 Cantilever crane

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109958818A (en) * 2017-12-14 2019-07-02 张亚婧 A kind of architectural engineering Pipe installing equipment
CN209226410U (en) * 2018-11-15 2019-08-09 纳派化学(上海)有限公司 A kind of lifting device of chemical raw material barrel
CN209554677U (en) * 2018-12-19 2019-10-29 严兆航 A kind of architectural engineering lifting device
CN210340051U (en) * 2019-09-02 2020-04-17 贾立术 Construction equipment hoisting device
CN211110738U (en) * 2019-09-27 2020-07-28 广西立兴建设工程有限公司 Hoisting apparatus is built in room

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109958818A (en) * 2017-12-14 2019-07-02 张亚婧 A kind of architectural engineering Pipe installing equipment
CN209226410U (en) * 2018-11-15 2019-08-09 纳派化学(上海)有限公司 A kind of lifting device of chemical raw material barrel
CN209554677U (en) * 2018-12-19 2019-10-29 严兆航 A kind of architectural engineering lifting device
CN210340051U (en) * 2019-09-02 2020-04-17 贾立术 Construction equipment hoisting device
CN211110738U (en) * 2019-09-27 2020-07-28 广西立兴建设工程有限公司 Hoisting apparatus is built in room

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113086861A (en) * 2021-04-16 2021-07-09 安徽明威科技发展有限公司 Cantilever crane

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Application publication date: 20210406

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