Hoisting equipment for hoisting milling machine and hoisting method

Abstract

The invention provides hoisting equipment for hoisting a milling machine and a hoisting method, and relates to the technical field of hoisting. The hoisting equipment comprises a first hoisting device, a second hoisting device and a first steel wire rope. Wherein the first hoisting device is used for being installed on a base of the milling machine and is connected with the second hoisting device through a first steel wire rope, and the second hoisting device is located above the milling machine. That is, the hoisting equipment provided by the invention is connected with the base and is wound to the upper part for hoisting, so that the stability and the safety in the hoisting process are ensured, and the accident risk caused by unstable hoisting is reduced. On the basis of the hoisting mode, the second hoisting device is further used for being connected with elevated hoisting equipment, so that the purpose of stably hoisting the milling machine in the limited area is achieved, meanwhile, it is correspondingly guaranteed that a roof does not need to be opened in the hoisting process, and it is guaranteed that the construction cost is reduced and the construction period is shortened. It can be understood that the hoisting equipment is easy to manufacture, low in cost and high in safety.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting, and in particular to a hoisting device and a hoisting method for hoisting a milling machine. Background Art

[0002] The milling machine is a machine tool widely used in metal processing. It has the characteristics of large size, heavy weight and high precision. It is generally directly hoisted by a car crane and placed in an indoor environment.

[0003] However, the inventors have found that the arm span of the truck crane is limited by the indoor space and cannot meet the lifting needs. The lifting operation often requires lifting the roof, which affects the construction cost and cycle. Summary of the invention

[0004] The objects of the present invention include, for example, providing a hoisting device and method for hoisting a milling machine, which can stably hoist the milling machine in a restricted area. At the same time, it also ensures that there is no need to lift the roof during the hoisting process, thereby reducing construction costs and shortening construction period.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a lifting device for lifting a milling machine, comprising a first lifting device, a second lifting device and a first steel wire rope; the first lifting device is used to be installed on the base of the milling machine, and is connected to the second lifting device through the first steel wire rope, the second lifting device is located above the milling machine, and is used to be connected to an overhead lifting device.

[0007] In an optional embodiment, the number of the first lifting devices is at least two, and the at least two first lifting devices are arranged at intervals along the width or length direction of the milling machine.

[0008] In an optional embodiment, the first lifting device includes a lower hanging beam, a positioning pin and a positioner, and the lower hanging beam is fixedly connected to the base of the milling machine through the positioning pin, and is fixedly connected to the first steel wire rope through the positioner.

[0009] In an optional embodiment, the first steel wire ropes correspond to the first lifting devices one by one, and any first steel wire rope has one end connected to the first lifting device and the other end wound around the second lifting device and connected to the first lifting device.

[0010] In an optional embodiment, the second lifting device includes an upper hanging beam assembly and two first pulleys, the upper hanging beam assembly is used to connect to the overhead lifting equipment, and the two first pulleys are connected to the upper hanging beam assembly and are passed through by the first steel wire rope.

[0011] In an optional embodiment, the second lifting device also includes a spring and a support column, one end of the spring is connected to the upper hanging beam assembly, and the other end is against the top wall of the milling machine, the support column is located in the spring and connected to the upper hanging beam assembly, and the length of the support column is less than the length of the spring.

[0012] In an optional embodiment, the upper suspension beam assembly includes a first upper suspension beam, a second upper suspension beam, a second steel wire rope and a second pulley, one side of the first upper suspension beam is connected to the first pulley, and the other side is connected to both ends of the second steel wire rope; one side of the second upper suspension beam is connected to the second pulley, and the other side is used to connect to the overhead lifting equipment; the second pulley is passed through the second steel wire rope.

[0013] In an optional embodiment, two limit rope clamps are provided on the second steel wire rope, and the two limit rope clamps are respectively located on both sides of the second pulley.

[0014] In an optional embodiment, the second upper hanging beam is configured as a square frame structure, and any side beam of the frame structure is provided with two hanging noses, and the upper hanging beam assembly also includes a plurality of third steel wire ropes for connecting to the overhead lifting equipment, and the two ends of the third steel wire ropes are respectively connected to any two hanging noses.

[0015] In a second aspect, the present invention provides a hoisting method for hoisting a milling machine, which is applied to the hoisting device for hoisting a milling machine according to any one of the aforementioned embodiments, and the hoisting method comprises the following steps:

[0016] Connecting the first lifting device to the base of the milling machine;

[0017] Connecting both ends of the first steel wire rope to the first lifting device, and allowing the middle portion of the first steel wire rope to pass through the second lifting device;

[0018] Connecting the second lifting device to the overhead lifting equipment and positioning the second lifting device above the milling machine;

[0019] utilizes overhead crane equipment to lift hoisting equipment and milling machines;

[0020] In case the milling machine is tilted, the overhead crane will place the milling machine on the ground. After the milling machine contacts the ground and returns to the normal position, the overhead crane will be used to lift the hoisting equipment and the milling machine again.

[0021] The beneficial effects of the embodiments of the present invention include, for example:

[0022] The present application provides a hoisting device and a hoisting method for hoisting a milling machine, which include a first hoisting device, a second hoisting device and a first steel wire rope. Among them, the first hoisting device is used to be installed on the base of the milling machine, and is connected to the second hoisting device through the first steel wire rope, and the second hoisting device is located above the milling machine. That is to say, the hoisting equipment provided by the present application is connected to the base and is hoisted around the top to ensure stability and safety during the hoisting process, thereby reducing the risk of accidents caused by unstable hoisting. In addition, on the basis of the above-mentioned hoisting method, the second hoisting device is also used to connect with the overhead lifting equipment to achieve the purpose of smoothly hoisting the milling machine in a restricted area. At the same time, it also ensures that there is no need to lift the roof during the hoisting process, thereby ensuring the reduction of construction costs and shortening of the construction period. It can be understood that the above-mentioned hoisting equipment is simple to manufacture, low cost and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of a hoisting device for hoisting a milling machine provided by an embodiment of the present invention;

[0025] Figure 2 Another schematic diagram of a hoisting device for hoisting a milling machine provided by an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of a first hoisting device provided in an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of a second lifting device provided in an embodiment of the present invention;

[0028] Figure 5 Another schematic diagram of the second lifting device provided by the embodiment of the present invention;

[0029] Figure 6 Another schematic diagram of the second lifting device provided by the embodiment of the present invention;

[0030] Figure 7 Another schematic diagram of the second lifting device provided by the embodiment of the present invention;

[0031] Figure 8 A schematic diagram of a limit rope clamp provided in an embodiment of the present invention;

[0032] Fig. 9Another schematic diagram of a limit rope clamp provided in an embodiment of the present invention;

[0033] Fig.10 The present invention provides a flowchart of a method for hoisting a milling machine according to an embodiment of the present invention.

[0034] Icons: 10-lifting equipment; 30-milling machine; 100-first lifting device; 110-lower hanging beam; 130-locating pin; 150-locator; 200-first steel wire rope; 300-second lifting device; 310-upper hanging beam assembly; 311-first upper hanging beam; 313-second upper hanging beam; 314-hanging nose; 315-second steel wire rope; 316-limiting rope clamp; 3161-locking plate; 3163-U-shaped piece; 3165-nut; 317-second pulley; 318-third steel wire rope; 330-first pulley; 350-spring; 370-support column. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] Example

[0042] As mentioned in the background art, when the mobile crane is lifting the milling machine 30, the arm span is limited by the indoor space and cannot meet the lifting requirements, so that the roof needs to be lifted for the lifting operation, which affects the construction cost and cycle.

[0043] In order to improve the above problems, the present application provides a new hoisting device 10 for hoisting a milling machine 30, especially for hoisting a heavy CNC double-sided milling machine 30. The hoisting device 10 can work together with an overhead lifting device to achieve the purpose of smoothly constructing and hoisting the milling machine 30 in a restricted area. At the same time, it also ensures that there is no need to lift the roof during the hoisting process, thereby reducing construction costs and shortening construction periods.

[0044] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of a hoisting device 10 for hoisting a milling machine 30 provided in an embodiment of the present invention is shown in FIG. Figure 2 Another schematic diagram of a hoisting device 10 for hoisting a milling machine 30 provided by an embodiment of the present invention. The present application provides a hoisting device 10 for hoisting a milling machine 30, which includes a first hoisting device 100, a second hoisting device 300 and a first steel wire rope 200.

[0045] The first hoisting device 100 is used to be installed on the base of the milling machine 30, and is connected to the second hoisting device 300 through the first steel wire rope 200, and the second hoisting device 300 is located above the milling machine 30. In other words, the hoisting device 10 provided in the present application is connected to the base and is hoisted above to ensure stability and safety during the hoisting process, thereby reducing the risk of accidents caused by unstable hoisting.

[0046] Moreover, based on the above-mentioned hoisting method, the second hoisting device 300 is also used to connect with the overhead lifting equipment to achieve the purpose of smoothly constructing and hoisting the milling machine 30 in a restricted area. At the same time, it is also ensured that there is no need to open the roof during the hoisting process, thereby reducing the construction cost and shortening the construction period. It can be understood that the above-mentioned hoisting device 10 is simple to manufacture, low in cost, and highly safe.

[0047] In addition, it should be noted that overhead lifting equipment refers to mechanical equipment installed on the top of a room or on a dedicated track for hoisting and transporting heavy objects. In this application, overhead lifting equipment can specifically refer to a bridge crane, a single-beam bridge crane, a gantry or an electric hoist, etc.

[0048] Please refer again Figure 1 and Figure 2 To further improve the stability of the hoisting, the number of the first hoisting devices 100 is at least two, and at least two first hoisting devices 100 are arranged at intervals along the width or length direction of the milling machine 30. Based on the joint action of the above-mentioned multiple first hoisting devices 100, the load can be effectively dispersed, the stress of a single structure can be reduced, and the overall stability and safety can be improved.

[0049] Accordingly, the first steel wire rope 200 corresponds to the first hoisting device 100 one by one, that is, the position and quantity correspond one by one, wherein the lengths of all the first steel wire ropes 200 are equal. Moreover, one end of any first steel wire rope 200 is connected to the first hoisting device 100, and the other end is wound through the second hoisting device 300 to be connected to the other end of the first hoisting device 100, so that the first steel wire rope 200 can slide relative to the second hoisting device 300, so that the tension and length of the steel wire rope can be dynamically adjusted according to actual needs, thereby fine-tuning the position and posture of the milling machine 30 to achieve leveling.

[0050] In some embodiments, in order to ensure the stability of the connection between the first lifting device 100 and the milling machine 30, Figure 2 and 3 As shown, the first hoisting device 100 includes a lower hanging beam 110, a positioning pin 130 and a positioner 150. The lower hanging beam 110 is fixedly connected to the base of the milling machine 30 through the positioning pin 130 to serve as a stable and reliable hoisting bottom support platform to ensure the stability of the milling machine 30 during the hoisting process and reduce the hoisting risk caused by unstable hoisting.

[0051] In addition, the lower hanging beam 110 is also fixedly connected to the first steel wire rope 200 through the positioner 150, thereby correspondingly ensuring the correct position of the first steel wire rope 200 during the hoisting or lifting operation, and reducing the risk of accidents caused by the displacement or falling of the first steel wire rope 200. Optionally, both ends of the lower hanging beam 110 extend from the base of the milling machine 30, and the number of the positioners 150 is two and they are respectively arranged at both ends of the lower hanging beam 110, so as to prevent the first steel wire rope 200 from rubbing or colliding with the outer wall of the milling machine 30 when it is wound around the milling machine 30, thereby affecting the hoisting safety and the structural stability of the milling machine 30.

[0052] In addition, it should be noted that when a plurality of first hoisting devices 100 are arranged at intervals along the length direction of the milling machine 30, the length dimension of the lower hanging beam 110 is determined by the width dimension of the base of the milling machine 30, and a positioning hole cooperating with two positioners 150 is opened symmetrically in the center. It can be understood that the length dimension of the lower hanging beam 110 is 1.15 to 1.2 times the width dimension of the base of the milling machine 30. The specific size of the positioning pin 130 is determined by the opening size of the lower hanging beam 110 to ensure the stability of the connection.

[0053] See also Figure 4 , Figure 4 Schematic diagram of the second hoisting device 300 provided in an embodiment of the present invention. In order to reduce the friction between the first steel wire rope 200 and the second hoisting device 300, the second hoisting device 300 includes an upper hanging beam assembly 310 and two first pulleys 330. The upper hanging beam assembly 310 is used to connect with the overhead lifting equipment; and the two first pulleys 330 are both connected to the upper hanging beam assembly 310, and are both passed through by the first steel wire rope 200.

[0054] It is understandable that the first steel wire rope 200 can move smoothly when it is wound around the groove or rim of the first pulley 330, reducing the wear caused by friction and extending the service life of the first steel wire rope 200 and the first pulley 330. In addition, it should be noted that the two first pulleys 330 are respectively arranged corresponding to the two ends of the lower suspension beam 110, that is, any first pulley 330 and the end opposite to the lower suspension beam 110 are located on the same vertical line. Based on this, if Figure 1 As shown, the first steel wire rope 200 is in a symmetrical U-shape when hoisted.

[0055] See also Figure 5 and Figure 6 , Figure 5 Another schematic diagram of the second lifting device 300 provided in an embodiment of the present invention, Figure 6 Another schematic diagram of the second hoisting device 300 provided by an embodiment of the present invention. In order to improve the self-balancing and stability of the milling machine 30 during the hoisting process, the second hoisting device 300 further includes a spring 350, one end of the spring 350 is connected to the upper hanging beam assembly 310, and the other end is against the top wall of the milling machine 30.

[0056] Based on the above arrangement, on the one hand, it is possible to ensure that the second lifting device 300 is in close contact with the milling machine 30 to avoid being suspended in the air, thereby correspondingly reducing the swing and instability during the lifting process; on the other hand, the elastic force of the spring 350 can be utilized to balance it with the gravity of the milling machine 30, so that the milling machine 30 can maintain a relatively stable position in the air, thereby correspondingly ensuring the lifting posture of the milling machine 30.

[0057] On the basis of the above, if Figure 5 and Figure 6 As shown, the second hoisting device 300 further includes a support column 370, which is located in the spring 350 and connected to the upper hanging beam assembly 310. It can be understood that when the milling machine 30 tilts and tilts excessively, the support column 370 and the spring 350 will be pressed against the top wall of the milling machine 30, thereby preventing the milling machine 30 from further tilting and even tipping over during the hoisting process.

[0058] In addition, it should be noted that in order to meet the posture requirements of the milling machine 30 in different lifting stages, the length of the support column 370 is smaller than the length of the spring 350, so as to give the milling machine 30 a certain degree of freedom in posture adjustment to ensure smooth lifting, reduce adjustment time, and improve lifting efficiency.

[0059] See also Figure 4 and 7 The upper hanging beam assembly 310 includes a first upper hanging beam 311, a second upper hanging beam 313, a second steel wire rope 315 and a second pulley 317. One side of the first upper hanging beam 311 is connected to the first pulley 330, and the other side is connected to both ends of the second steel wire rope 315; and one side of the second upper hanging beam 313 is connected to the second pulley 317, and the other side is used to connect to the overhead lifting equipment.

[0060] On the basis of the above, the second pulley 317 is penetrated by the second steel wire rope 315, so that the first upper hanging beam 311 and the second upper hanging beam 313 also form a self-balancing structure. Similar to the above, all the second steel wire ropes 315 are of equal length. In addition, any second steel wire rope 315 can slide relative to the second pulley 317, so that the tension and length of the steel wire rope can be dynamically adjusted according to actual needs, thereby fine-tuning the position and posture of the first upper hanging beam 311 and the milling machine 30.

[0061] In addition, it can be understood that when the number of the first hoisting device 100 is one, the number of the second pulley 317 and the second steel wire rope 315 can also be set to two; when the number of the first hoisting device 100 is two, the number of the second pulley 317 and the second steel wire rope 315 can also be set to four accordingly. It should be noted that, no matter which of the above situations, the number of the first pulley 330 and the second pulley 317 are the same and are located on the same straight line.

[0062] Furthermore, two limit rope clamps 316 are provided on the second steel wire rope 315, and the two limit rope clamps 316 are respectively located on both sides of the second pulley 317 to ensure that the second steel wire rope 315 moves within a certain range, thereby ensuring that the milling machine 30 can adjust the lifting posture and avoiding the milling machine 30 from tipping over during the lifting process.

[0063] It should be noted that if Figure 8 and Fig. 9As shown in the figure, the limit rope clamp 316 includes a locking plate 3161, a U-shaped member 3163 and a nut 3165. Among them, both ends of the U-shaped member 3163 pass through the locking member respectively and are fastened by the corresponding nuts 3165. At this time, the U-shaped member 3163 and the locking member enclose a limiting space, and a part of the second steel wire rope 315 is located in the limiting space and is clamped and limited by the U-shaped member 3163 and the locking member. In addition, it should be noted that both ends of the second steel wire rope 315 are connected to the first upper suspension beam 311 through shackles.

[0064] Based on the above settings, it can be understood that both sides of the first upper suspension beam 311 can independently bear and balance the forces acting on it. Specifically, on the upper side of the first upper suspension beam 311, a self-balancing structure composed of the second pulley 317 and the second steel wire rope 315 is used to distribute and balance the hoisting force from the overhead lifting equipment; on the lower side of the first upper suspension beam 311, a self-balancing structure composed of the spring 350 and the support column 370, and a self-balancing structure composed of the first pulley 330 and the first steel wire rope 200 are used to distribute and balance the gravity from the milling machine 30.

[0065] In addition, it should be noted that in some embodiments, such as Figure 6 As shown in the figure, the first upper suspension beam 311 is set as a "field" - shaped frame, and a plurality of support columns 370 and springs 350 corresponding to the support columns 370 one by one are arranged on the two intersecting beam parts in the middle, so as to ensure self - balance when subjected to external force impacts from the front - rear direction or the left - right direction.

[0066] Please refer to again Figure 7 . In some embodiments, the second upper suspension beam 313 is set as a square frame structure, and two hanging lugs 314 are arranged on any side beam of the frame structure. Please refer to again in combination with Figure 5 , the upper suspension beam assembly 310 further includes a plurality of third steel wire ropes 318 for connecting with the overhead lifting equipment, and both ends of the third steel wire rope 318 are respectively connected to any two hanging lugs 314.

[0067] It can be understood that the lengths of all the third steel wire ropes 318 are equal. And a plurality of third steel wire ropes 318 can all be connected to one overhead lifting equipment to ensure hoisting balance; or some of them can be connected to one overhead lifting equipment and some to another overhead lifting equipment, so as to share the load and ensure hoisting safety.

[0068] For example, when all the third steel wire ropes 318 are connected to one overhead lifting equipment, the hook of the overhead lifting equipment and the central symmetry axis of the four second pulleys 317 are in a straight line; when half of the third steel wire ropes 318 are connected to one overhead lifting equipment and the other half of the third steel wire ropes 318 are connected to another overhead lifting equipment, the hooks of the two overhead lifting equipment are respectively located on the central axes of the second pulleys 317 that are symmetrical in pairs.

[0069] In addition, if Fig.10 As shown, the present invention provides a hoisting method for hoisting a milling machine 30, which is applied to the hoisting device 10 for hoisting a milling machine 30 in any of the aforementioned embodiments, and the hoisting method comprises the following steps:

[0070] S11 : Connect the first lifting device 100 to the base of the milling machine 30 .

[0071] Based on this, the hoisting platform is used as a stable and reliable bottom support platform to ensure the stability of the milling machine 30 during the hoisting process and reduce the hoisting risks caused by unstable hoisting.

[0072] S12: Connect both ends of the first steel wire rope 200 to the first hoisting device 100 , and allow the middle portion of the first steel wire rope 200 to pass through the second hoisting device 300 .

[0073] Based on this, the hoisting posture of the milling machine 30 is guaranteed and the hoisting safety is improved.

[0074] S13: Connect the second hoisting device 300 to an overhead lifting device, and place the second hoisting device 300 above the milling machine 30 .

[0075] Based on this, the purpose of stably hoisting the milling machine 30 in a restricted area is achieved. At the same time, it is also ensured that there is no need to lift the roof during the hoisting process, thereby reducing the construction cost and shortening the construction period.

[0076] S14: Lift the hoisting device 10 and the milling machine 30 using an overhead crane.

[0077] Based on this, efficient hoisting of the milling machine 30 is achieved.

[0078] S15: When the milling machine 30 is tilted, the overhead lifting device places the milling machine 30 on the ground. After the milling machine 30 contacts the ground and returns to the normal position, the overhead lifting device is used to lift the hoisting device 10 and the milling machine 30 again.

[0079] Based on this, the self-balancing and self-centering of the milling machine 30 is realized. It can be understood that the determination of the tilt is determined by the limit rope clamp 316 and the support column 370 in the above structure. For example, when the limit rope clamp 316 and the second pulley 317 are in contact, the overhead lifting equipment places the milling machine 30 on the ground; or, when the support column 370 and the top wall of the milling machine 30 are in contact, the overhead lifting equipment places the milling machine 30 on the ground.

[0080] In summary, the present application provides a hoisting device 10 and a hoisting method for hoisting a milling machine 30, which includes a first hoisting device 100, a second hoisting device 300 and a first wire rope 200. Among them, the first hoisting device 100 is used to be installed on the base of the milling machine 30, and is connected to the second hoisting device 300 through the first wire rope 200, and the second hoisting device 300 is located above the milling machine 30. That is to say, the hoisting device 10 provided in the present application is connected to the base and is hoisted around the top to ensure stability and safety during the hoisting process, thereby reducing the risk of accidents caused by unstable hoisting. In addition, on the basis of the above-mentioned hoisting method, the second hoisting device 300 is also used to connect with the overhead lifting equipment to achieve the purpose of hoisting the milling machine 30 stably in a restricted area. At the same time, it is also correspondingly ensured that there is no need to lift the roof during the hoisting process, thereby ensuring the reduction of construction costs and shortening the construction period. It can be understood that the above-mentioned hoisting device 10 is simple to make, low cost and high safety.

[0081] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A hoisting device for hoisting a milling machine, characterized in that: The invention comprises a first lifting device (100), a second lifting device (300) and a first steel wire rope (200); the first lifting device (100) is used to be installed on the base of a milling machine (30) and is connected to the second lifting device (300) via the first steel wire rope (200); the second lifting device (300) is located above the milling machine (30) and is used to be connected to an overhead lifting device.

2. The hoisting device for hoisting a milling machine according to claim 1, characterized in that: The number of the first lifting devices (100) is at least two, and at least two of the first lifting devices (100) are arranged at intervals along the width or length direction of the milling machine (30).

3. The hoisting device for hoisting a milling machine according to claim 1 or 2, characterized in that: The first hoisting device (100) comprises a lower hanging beam (110), a positioning pin (130) and a positioner (150); the lower hanging beam (110) is fixedly connected to the base of the milling machine (30) via the positioning pin (130), and is fixedly connected to the first steel wire rope (200) via the positioner (150).

4. The hoisting device for hoisting a milling machine according to claim 1 or 2, characterized in that: The first steel wire ropes (200) correspond to the first lifting devices (100) one by one, and any one of the first steel wire ropes (200) has one end connected to the first lifting device (100) and the other end wound around the second lifting device (300) and connected to the first lifting device (100).

5. The hoisting device for hoisting a milling machine according to claim 1, characterized in that: The second hoisting device (300) comprises an upper hanging beam assembly (310) and two first pulleys (330), wherein the upper hanging beam assembly (310) is used to be connected to the overhead lifting equipment, and the two first pulleys (330) are both connected to the upper hanging beam assembly (310) and are both passed through by the first steel wire rope (200).

6. The hoisting device for hoisting a milling machine according to claim 5, characterized in that: The second lifting device (300) also includes a spring (350) and a support column (370), one end of the spring (350) is connected to the upper hanging beam assembly (310), and the other end is abutted against the top wall of the milling machine (30), the support column (370) is located in the spring (350) and is connected to the upper hanging beam assembly (310), and the length of the support column (370) is less than the length of the spring (350).

7. The hoisting device for hoisting a milling machine according to claim 5, characterized in that: The upper hanging beam assembly (310) includes a first upper hanging beam (311), a second upper hanging beam (313), a second steel wire rope (315) and a second pulley (317); one side of the first upper hanging beam (311) is connected to the first pulley (330), and the other side is connected to both ends of the second steel wire rope (315); one side of the second upper hanging beam (313) is connected to the second pulley (317), and the other side is used to connect to the overhead lifting equipment; the second pulley (317) is passed through the second steel wire rope (315).

8. The hoisting device for hoisting a milling machine according to claim 7, characterized in that: The second steel wire rope (315) is provided with two limit rope clamps (316), and the two limit rope clamps (316) are respectively located on both sides of the second pulley (317).

9. The hoisting device for hoisting a milling machine according to claim 7, characterized in that: The second upper hanging beam (313) is configured as a square frame structure, and any side beam of the frame structure is provided with two hanging noses (314). The upper hanging beam assembly (310) further comprises a plurality of third steel wire ropes (318) for connecting to the overhead lifting equipment, and the two ends of the third steel wire ropes (318) are respectively connected to any two of the hanging noses (314).

10. A method for hoisting a milling machine, characterized in that: The hoisting device for hoisting a milling machine as claimed in any one of claims 1 to 9, wherein the hoisting method comprises the following steps; Connecting the first lifting device (100) to the base of the milling machine (30); Connecting both ends of the first steel wire rope (200) to the first lifting device (100), and allowing the middle portion of the first steel wire rope (200) to pass through the second lifting device (300); Connecting the second lifting device (300) to an overhead lifting device, and positioning the second lifting device (300) above the milling machine (30); Using an overhead lifting device to lift the lifting device (10) and the milling machine (30); When the milling machine (30) tilts, the overhead lifting device places the milling machine (30) on the ground, and after the milling machine (30) contacts the ground and returns to the normal position, the overhead lifting device is used to lift the hoisting device (10) and the milling machine (30) again.

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