A lifting device

Abstract

The present invention relates to the technical field of lifting machinery, and discloses a sling. The sling comprises: a first lifting beam, used to connect a workpiece, a first lifting portion is provided on the first lifting beam, and a first telescopic beam is installed at one end of the first lifting beam; a second lifting beam, used to connect the workpiece, a second lifting portion is provided on the second lifting beam, and a second telescopic beam is installed at one end of the second lifting beam, and the second telescopic beam can move along the extension direction of the first telescopic beam. In the present invention, the second telescopic beam moves along the extension direction of the first telescopic beam, so that the spacing between the first lifting beam and the second lifting beam used to connect the workpiece can be adaptively adjusted, so that the sling can be used to lift workpieces of different lengths.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting machinery, and in particular to a lifting device. Background Art

[0002] In the papermaking industry, paper rolls are usually lifted and transported by cranes through special lifting equipment. Since large paper rolls are generally cylindrical in structure, rollers are inserted into the paper rolls during lifting. The special lifting equipment usually includes a lifting beam and hooks at both ends of the lifting beam, and the hooks at both ends of the lifting beam correspond to the two ends of the roller. The lifting beam is connected to the roller through the hooks, and the crane then lifts the paper roll on the roller by lifting the lifting beam.

[0003] The crane generally includes an elevated track and two lifting vehicles that are matched with the elevated track and can move along the elevated track. The two lifting vehicles simultaneously lift the paper roll through the special lifting device. In particular, if the paper roll is directly lifted by two lifting vehicles, it will cause problems such as unstable lifting and the distance between the two lifting vehicles is not easy to adapt to the distance between the two ends of the roller.

[0004] At present, paper rolls of different specifications often have very different lengths, so different paper rolls require rollers of different lengths to be connected to the above-mentioned special slings. Because the hooks at both ends of the lifting beam correspond to the two ends of the roller, rollers of different lengths must be lifted by special slings with beams of different lengths. In the prior art, only by manufacturing special slings with beams of different lengths can the lifting requirements of paper rolls of different specifications be met, resulting in a waste of resources and storage space for the sling. Summary of the invention

[0005] Based on the above, an object of the present invention is to provide a sling to meet the lifting requirements of paper rolls of different specifications and save the manufacturing cost and storage space of the sling.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A lifting device, comprising:

[0008] A first lifting beam is used to connect the workpiece, the first lifting beam is provided with a first lifting part, and a first telescopic beam is installed at one end of the first lifting beam;

[0009] The second lifting beam is used to connect the workpiece. The second lifting beam is provided with a second lifting portion. A second telescopic beam is installed at one end of the second lifting beam. The second telescopic beam can move along the extension direction of the first telescopic beam.

[0010] Preferably, the first telescopic beam has a slot therein, and the second telescopic beam is inserted into the slot.

[0011] Preferably, a guide hole extending along the extension direction of the first telescopic beam is formed on the side wall of the first telescopic beam, and a guide wheel is provided on the side wall of the second telescopic beam, and the guide wheel is rotatably disposed in the guide hole.

[0012] Preferably, a guide hole reinforcement plate is provided on four sides of the guide hole, and the guide hole reinforcement plate has scale marks arranged along the length direction of the guide hole.

[0013] Preferably, a first roller is provided on the first telescopic beam, and the first roller is rollingly disposed on the second telescopic beam.

[0014] Preferably, the first roller is arranged at an end of the first telescopic beam away from the first lifting beam.

[0015] Preferably, a second roller is provided on the second telescopic beam, and the second roller is rollingly disposed on the first telescopic beam.

[0016] Preferably, the second roller is arranged at one end of the second telescopic beam facing the first lifting beam.

[0017] Preferably, the lifting device further comprises an electric push rod, a base of the electric push rod is mounted on the first telescopic beam, and a driving rod of the electric push rod extends from the base and is connected to the second telescopic beam.

[0018] Preferably, the first lifting part and the second lifting part respectively have a lifting rod for hooking, the lifting rod on the first lifting part is hinged to the first lifting beam, and the lifting rod on the second lifting part is hinged to the second lifting beam.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a sling, wherein a second telescopic beam moves along the extension direction of a first telescopic beam so that the spacing between a first lifting beam and a second lifting beam for connecting workpieces can be adaptively adjusted, thereby enabling the sling to be used for lifting workpieces of different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without creative work.

[0022] Figure 1 It is the main view of the spreader Figure 1 ;

[0023] Figure 2 It is the main view of the spreader Figure 2 ;

[0024] Figure 3 yes Figure 2 A cross-sectional view of section A;

[0025] Figure 4 yes Figure 2 A partial magnified view of the middle B area;

[0026] Figure 5 yes Figure 2 Sectional view of section C;

[0027] Figure 6 is a front view of the first telescopic beam;

[0028] Figure 7 It is the matching relationship between the first telescopic beam and the second telescopic beam Figure 1 ;

[0029] Figure 8 is the front view of the second telescopic beam;

[0030] Fig. 9 It is the matching relationship between the first telescopic beam and the second telescopic beam Figure 2 .

[0031] In the figure:

[0032] 1-First lifting beam;

[0033] 10-guide hole; 101-first lifting part; 1011-guide hole reinforcement plate; 100-workpiece; 11-first telescopic beam; 110-first roller; 111-slot;

[0034] 2- Second lifting beam;

[0035] 20-guide wheel; 201-second lifting part; 21-second telescopic beam; 210-second roller; 211-wheel axle; 2110-lubricating oil circuit; 212-reinforcement ring; 213-dust cover; 214-oil cup;

[0036] 3- Electric push rod;

[0037] 31-base; 311-first mounting frame; 312-second mounting frame; 32-driving rod; 320-joint; 321-first pin shaft; 322-second pin shaft;

[0038] a-lifting rod; b-first lifting pin shaft; c-second lifting pin shaft. DETAILED DESCRIPTION

[0039] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1 and Figure 2 The present embodiment provides a lifting device, which can lift a paper roll with rollers, that is, a workpiece 100. The lifting device includes: a first lifting beam 1, which can be connected to one end of the workpiece 100 through a hook, a first lifting portion 101 is provided on the first lifting beam 1, and a first telescopic beam 11 is installed at one end of the first lifting beam 1; a second lifting beam 2, which can be connected to the other end of the workpiece 100 through a hook, a second lifting portion 201 is provided on the second lifting beam 2, and a second telescopic beam 21 is installed at one end of the second lifting beam 2, and the second telescopic beam 21 can move along the extension direction of the first telescopic beam 11.

[0041] Specifically, the first lifting beam 1, the first telescopic beam 11, the second telescopic beam 21 and the second lifting beam 2 extend in a straight line. The second telescopic beam 21 moves along the extension direction of the first telescopic beam 11, so that the spacing between the first lifting beam 1 and the second lifting beam 2 for connecting the workpiece 100 can be adaptively adjusted, so that the lifting device can lift workpieces 100 of different lengths.

[0042] See also Figure 1 , Figure 2 and Figure 3 The first telescopic beam 11 and the second telescopic beam 21 are both hollow structures. The first telescopic beam 11 has a slot 111, and the second telescopic beam 21 is inserted into the slot 111 to ensure the reliability of the cooperation between the first telescopic beam 11 and the second telescopic beam 21. A guide hole 10 extending along the extension direction of the first telescopic beam 11 is provided on the side wall of the first telescopic beam 11, and a guide wheel 20 is provided on the side wall of the second telescopic beam 21. The guide wheel 20 is rollingly arranged in the guide hole 10. Among them, the guide hole 10 is an oblong structure and is connected to the slot 111. The width of the guide hole 10 is equal to the diameter of the guide wheel 20.

[0043] If the guide wheel 20 abuts against the end of the guide hole 10 close to the first lifting beam 1, the distance between the first lifting beam 1 and the second lifting beam 2 is at the minimum state (see Figure 1 ); If the guide wheel 20 abuts against the end of the guide hole 10 away from the first lifting beam 1, the distance between the first lifting beam 1 and the second lifting beam 2 is at the maximum state (see Figure 2 ).

[0044] The setting of the guide hole 10 and the guide wheel 20 can not only ensure the movement of the second telescopic beam 21 along the extension direction of the first telescopic beam 11, but also has a limiting function for the second telescopic beam 21 to prevent the second telescopic beam 21 from slipping out of the slot 111. The guide hole reinforcement plate 1011 is welded around the periphery of the guide hole 10, thereby enhancing the strength of the hole wall of the guide hole 10 and enhancing the rolling reliability of the guide wheel 20. The guide hole reinforcement plate 1011 has scale marks set along the length direction of the guide hole 10, so as to facilitate the spacing between the first lifting beam 1 and the second lifting beam 2 to meet actual requirements.

[0045] Specifically, two guide holes 10 and two guide wheels 20 are respectively provided, the two guide holes 10 are provided on both sides of the first telescopic beam 11, and the two guide wheels 20 are provided on both sides of the second telescopic beam 21, and the two guide holes 10 and the two guide wheels 20 are matched one by one.

[0046] Still see Figure 1 , Figure 2 and Figure 3 Two axle mounting holes are provided on the side wall of the second telescopic beam 21, and axles 211 are inserted into the two axle mounting holes. Both ends of the axle 211 extend out of the second telescopic beam 21 and are rotatably connected to a guide wheel 20. Reinforcement rings 212 are welded around the periphery of the axle mounting holes to enhance the strength of the axle mounting hole walls.

[0047] Specifically, the two ends of the axle 211 are respectively screwed with dust covers 213. The dust covers 213 abut against the guide hole reinforcement plate 1011, and prevent dust from entering the matching gap between the axle 211 and the guide wheel 20, while playing the role of axial positioning of the two guide wheels 20.

[0048] Specifically, oil cups 214 are provided at both ends of the wheel axle 211, and the oil cups 214 are connected to the lubricating oil passage 2110 in the wheel axle 211, and the lubricating oil passage 2110 is connected to the matching clearance between the wheel axle 211 and the guide wheel 20. By injecting lubricating oil into the inlet of the oil cup 214, the lubricating oil can lubricate the matching surface of the wheel axle 211 and the guide wheel 20 through the lubricating oil passage 2110.

[0049] In this embodiment, eight first rollers 110 are provided on the first telescopic beam 11, and the first rollers 110 are rotatably disposed on the second telescopic beam 21 (see Figure 6 and Figure 7 ), which enhances the flexibility of the second telescopic beam 21 moving along the first telescopic beam 11. The first roller 110 is arranged at one end of the first telescopic beam 11 away from the first lifting beam 1, so that when the distance between the first lifting beam 1 and the second lifting beam 2 is in the minimum state and the maximum state, the first roller 110 and the second telescopic beam 21 always maintain a matching relationship.

[0050] In this embodiment, eight second rollers 210 are provided on the second telescopic beam 21, and the second rollers 210 are rotatably disposed on the first telescopic beam 11 (see Figure 8 and Fig. 9 ), which enhances the flexibility of the second telescopic beam 21 moving along the first telescopic beam 11. The second roller 210 is arranged at one end of the second telescopic beam 21 facing the first lifting beam 1, so that when the distance between the first lifting beam 1 and the second lifting beam 2 is in the minimum state and the maximum state, the second roller 210 and the first telescopic beam 11 always maintain a matching relationship.

[0051] See also Figure 4 The lifting device further comprises an electric push rod 3, a base 31 of the electric push rod 3 is mounted on the first telescopic beam 11, and a driving rod 32 of the electric push rod 3 extends from the base 31 and is connected to the second telescopic beam 21. The driving direction of the electric push rod 3 extends along the extension direction of the first telescopic beam 11, and is used to drive the second telescopic beam 21 to move along the first telescopic beam 11. When the second telescopic beam 21 moves, the base 31 remains relatively still on the first telescopic beam 11, thereby ensuring the stable operation of important components such as the motor in the base 31.

[0052] Generally, the electric push rod 3 is small in size, high in precision and good in self-locking performance, can be directly driven by a motor and does not require an air source and an oil circuit for driving, and is widely used in various mechanical fields.

[0053] Specifically, the base 31 is installed on the first telescopic beam 11 through the first mounting frame 311, the driving rod 32 is connected to the second mounting frame 312 on the second telescopic beam 21 through the joint 320, and the joint 320 is rotatably connected with a first pin shaft 321 and a second pin shaft 322 extending perpendicularly to each other. The driving rod 32 is hinged to the joint 320 through the first pin shaft 321, and the joint 320 is hinged to the second mounting frame 312 through the second pin shaft 322.

[0054] See also Figure 5 The first lifting part 101 and the second lifting part 201 respectively have a lifting rod a for hooking.

[0055] In the first lifting part 101, the first lifting pin shaft b and the second lifting pin shaft c are rotatably connected between the two plate-shaped lifting rods a, the first lifting pin shaft b is used for hooking, and the lifting rod a is hinged to the first lifting beam 1 through the second lifting pin shaft c. The first lifting pin shaft b and the second lifting pin shaft c are perpendicular to the extension direction of the first telescopic beam 11.

[0056] In the second lifting part 201, the first lifting pin shaft b and the second lifting pin shaft c are rotatably connected between the two plate-like lifting rods a, the first lifting pin shaft b is used for hooking, and the lifting rod a is hinged to the second lifting beam 2 through the second lifting pin shaft c. The first lifting pin shaft b and the second lifting pin shaft c are perpendicular to the extension direction of the first telescopic beam 11.

[0057] In actual operation, the workpiece 100 is generally lifted by a crane through the lifting device. The crane generally includes an elevated track and two lifting vehicles that cooperate with the elevated track and can move along the elevated track. The two lifting vehicles lift the workpiece 100 simultaneously through the lifting device. When the workpiece 100 is lifted by the lifting device:

[0058] First, start the two cranes on the elevated track until the distance between the two cranes is roughly the same as the distance between the first lifting beam 1 and the second lifting beam 2;

[0059] Then, the hook of one of the cranes is connected to the first lifting pin shaft b of the first lifting part 101, and the hook of the other crane is connected to the first lifting pin shaft b of the second lifting part 201;

[0060] Next, according to the length of the workpiece 100, the electric push rod 3 is driven to adjust the distance between the first lifting beam 1 and the second lifting beam 2 to be adapted to the length of the workpiece 100, and the lifting vehicle moves synchronously with the electric push rod 3 along the elevated track;

[0061] Finally, one end of the workpiece 100 is connected by the hook of the first lifting beam 1, and the other end of the workpiece 100 is connected by the hook of the second lifting beam 2, so as to lift the workpiece 100, and then the two lifting vehicles move at a constant speed along the elevated track to transport the workpiece 100.

[0062] The lifting rod a on the first lifting part 101 is hinged on the first lifting beam 1, and the lifting rod a on the second lifting part 201 is hinged on the second lifting beam 2. When the lifting vehicle and the electric push rod 3 are in synchronous operation, the synchronous operation error between the lifting vehicle and the electric push rod 3 will not easily cause the first lifting pin shaft b to be detached from the hook, and will not affect the spacing adjustment between the first lifting beam 1 and the second lifting beam 2; when the two lifting vehicles move along the elevated track at the same speed, the speed error of the two lifting vehicles will not easily cause the first lifting pin shaft b to be detached from the hook, and will not affect the handling of the workpiece 100.

[0063] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A sling, characterized in that: include: A first lifting beam (1) is used to connect a workpiece (100), wherein a first lifting portion (101) is provided on the first lifting beam (1), and a first telescopic beam (11) is installed at one end of the first lifting beam (1); A second lifting beam (2) for connecting the workpiece (100), the second lifting beam (2) being provided with a second lifting portion (201), a second telescopic beam (21) being installed at one end of the second lifting beam (2), and the second telescopic beam (21) being movable along the extension direction of the first telescopic beam (11); The first telescopic beam (11) and the second telescopic beam (21) are both hollow structures; the first telescopic beam (11) has a slot (111) therein, and the second telescopic beam (21) is inserted into the slot (111); A guide hole (10) extending along the extension direction of the first telescopic beam (11) is provided on the side wall of the first telescopic beam (11), and a guide wheel (20) is provided on the side wall of the second telescopic beam (21), and the guide wheel (20) is rotatably arranged in the guide hole (10); The first telescopic beam (11) is provided with a first roller (110), the first roller (110) is rotatably arranged on the second telescopic beam (21), and the first roller (110) is arranged at an end of the first telescopic beam (11) away from the first lifting beam (1); The second telescopic beam (21) is provided with a second roller (210), the second roller (210) is rollingly arranged on the first telescopic beam (11), and the second roller (210) is arranged at one end of the second telescopic beam (21) facing the first lifting beam (1).

2. The sling according to claim 1, characterized in that: A guide hole reinforcement plate (1011) is provided on the four sides of the guide hole (10), and the guide hole reinforcement plate (1011) has scale marks arranged along the length direction of the guide hole (10).

3. The sling according to claim 1, characterized in that: It also comprises an electric push rod (3), a base (31) of the electric push rod (3) being mounted on the first telescopic beam (11), and a driving rod (32) of the electric push rod (3) extending from the base (31) and connected to the second telescopic beam (21).

4. The sling according to any one of claims 1 to 3, characterized in that: The first lifting part (101) and the second lifting part (201) respectively have a lifting rod (a) for hooking, the lifting rod (a) on the first lifting part (101) is hinged to the first lifting beam (1), and the lifting rod (a) on the second lifting part (201) is hinged to the second lifting beam (2).

Images