A crane

Abstract

The present invention belongs to the technical field of cranes, and discloses a crane, comprising a crossbeam assembly and a lifting mechanism, wherein the crossbeam assembly comprises a first main beam, a second main beam and an end beam, wherein the first main beam and the second main beam are connected by the end beam, and the lifting mechanism comprises a push-pull assembly, a first pulley block, a second pulley block, a wire rope and a hook, wherein the push-pull assembly is arranged on the first main beam, the first pulley block and the second pulley block are respectively hung and installed on the first main beam and the second main beam, and the wire rope is sequentially wound around the first pulley block and the second pulley block from the execution end of the push-pull assembly, and the first pulley block and the second pulley block are both installed with hooks. A push-pull assembly can simultaneously drive the first pulley block and the second pulley block to lift or place materials, and the structure is compact, and the push-pull assembly lowers or raises the first pulley block and the second pulley block by pushing and pulling the wire rope, the push-pull assembly and the first pulley block are arranged in an L shape, the flattening degree of the lifting mechanism is high, and the headroom of the crane is low.

Description

Technical Field

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

[0002] like Figure 1 As shown, during the working process of the tunnel boring machine, a bean-grain stone tank 200 for storing bean-grain stones is equipped. The bean-grain stone tank 200 is in a long strip shape and can weigh about 20 tons when filled with bean-grain stones. It is usually necessary to use a crane 100 to lift the bean-grain stone tank 200 to achieve its conversion between various workstations and then replace the bean-grain stone tank 200. In the prior art, a chain hoist is usually used to lift the bean-grain stone tank 200. However, on the one hand, since the larger the tonnage of the chain hoist, the wider the base in the width direction, and the narrow tunnel space, the lifting tonnage of the chain hoist is limited or the safety gap on both sides is too small, which is prone to scratches and damage; on the other hand, the upper and lower dimensions of the hoist body and the chain box occupy most of the space, resulting in a loss of the size of the lifting clearance, which in turn limits its installation and use conditions in the tunnel space.

[0003] Based on the above situation, it is urgent for us to design a crane to solve the above problems. Summary of the invention

[0004] An object of the present invention is to provide a crane with a compact structure and low headroom.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A crane, comprising:

[0007] A crossbeam assembly, the crossbeam assembly comprising a first main beam, a second main beam and an end beam, the first main beam and the second main beam being connected by the end beam;

[0008] A lifting mechanism, the lifting mechanism includes a push-pull assembly, a first pulley block, a second pulley block, a wire rope and a hook, the push-pull assembly is laid and installed on the first main beam, the first pulley block and the second pulley block are respectively hung and installed on the first main beam and the second main beam, the wire rope is sequentially wound around the first pulley block and the second pulley block from the execution end of the push-pull assembly, and the hooks are installed on both the first pulley block and the second pulley block.

[0009] As a preferred embodiment, the push-pull assembly includes a first driving member, a movable pulley and a fixed pulley. The movable pulley is slidably arranged on the first main beam and connected to the output end of the first driving member. The fixed pulley is installed on the first main beam and is located on the side of the movable pulley close to the first pulley group. The steel wire rope is sequentially wound around the movable pulley and the fixed pulley until it is wound around the first pulley group.

[0010] As a preferred embodiment, the first pulley group includes a first lifting pulley and a first swing pulley, the first lifting pulley is used to install the hook, the first swing pulley is installed on the first main beam, and the rotating axis of the first lifting pulley is parallel to the end beam, the rotating axis of the first swing pulley is parallel to the first main beam, and the wire rope is sequentially wrapped around the first lifting pulley and the first swing pulley from the execution end of the push-pull assembly.

[0011] As a preferred embodiment, the first pulley group also includes a first balancing pulley, the rotating axis of the first balancing pulley is parallel to the rotating axis of the first swing pulley, and the steel wire rope is sequentially wound around one end of the lifting pulley, the first balancing pulley, the other end of the lifting pulley and the first swing pulley.

[0012] As a preferred solution, the first pulley block further comprises a rotating frame, the first swing pulley is rotatably arranged on the rotating frame, the rotating frame is rotatably arranged on the first main beam, and the rotating axis of the rotating frame is parallel to the rotating axis of the first lifting pulley.

[0013] As a preferred solution, the second pulley group includes a second lifting pulley, a second swing pulley and a second balancing pulley, the second lifting pulley is used to install the hook, the second swing pulley and the second balancing pulley are installed on the second main beam, and the wire rope is sequentially wrapped from the first pulley group around the second swing pulley, one end of the second lifting pulley, the second balancing pulley and the other end of the second lifting pulley until it is fixed on the crossbeam assembly.

[0014] As a preferred embodiment, the second pulley block also includes a steering pulley, which is rotatably arranged on the second main beam, and the steel wire rope is passed from the other end of the second lifting pulley around the side of the steering pulley away from the hook until it is fixed on the second main beam.

[0015] As a preferred solution, the crane further comprises a sliding mechanism, and the sliding mechanism comprises:

[0016] A track, wherein the track is slidably connected to the end beam;

[0017] A gear and a rack, one of the gear and the rack is mounted on the track, the other is mounted on the end beam, and the gear is meshed with the rack;

[0018] A second driving member, wherein an output end of the second driving member is drivingly connected to the gear.

[0019] As a preferred solution, a slide groove is arranged on the side wall of the track, and a roller is installed on the end beam, and the roller is rollingly arranged in the slide groove.

[0020] As a preferred solution, limiting members are provided at both ends of the track, and the limiting members can abut against the end beam to limit the sliding position of the end beam.

[0021] The beneficial effects of the present invention are as follows: a crane is provided, wherein a lifting mechanism comprises a push-pull assembly, a first pulley block, a second pulley block, a wire rope and a hook, wherein the push-pull assembly is laid on the first main beam, the first pulley block and the second pulley block are respectively hung on the first main beam and the second main beam and are both provided with hooks, and a push-pull assembly can simultaneously drive the first pulley block and the second pulley block to lift or place materials, wherein the structure is compact, and the push-pull assembly and the first pulley block are arranged in an L shape, the flattening degree of the lifting mechanism is high, and thus the clearance of the crane is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the crane working in the tunnel;

[0024] Figure 2 It is a structural schematic diagram of the crane described in the embodiment;

[0025] Figure 3 It is a structural schematic diagram of the lifting mechanism described in the embodiment;

[0026] Figure 4 It is a structural schematic diagram of the crane according to the embodiment after the first main beam and the second main beam are disassembled;

[0027] Figure 5 A first perspective view of the end beam and the sliding mechanism of the embodiment when assembled;

[0028] Figure 6 This is a second viewing angle diagram of the end beam and the sliding mechanism described in the embodiment when assembled.

[0029] Figures 1 to 6 middle:

[0030] 100. Crane;

[0031] 1. crossbeam assembly; 11. first main beam; 12. second main beam; 13. end beam; 131. roller;

[0032] 2. Lifting mechanism; 21. Push-pull assembly; 211. First driving member; 212. Moving pulley; 2121. Bracket; 2122. Rolling shaft; 213. Fixed pulley; 22. First pulley block; 221. First lifting pulley; 222. First swing pulley; 223. First balancing pulley; 224. Rotating frame; 23. Second pulley block; 231. Second lifting pulley; 232. Second swing pulley; 233. Second balancing pulley; 234. Steering pulley; 24. Hook; 25. Wire rope;

[0033] 3. Sliding mechanism; 31. Track; 311. Slide groove; 312. Limiting member; 32. Gear; 33. Rack; 34. Second driving member;

[0034] 200. Pisolite jar. DETAILED DESCRIPTION

[0035] 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.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] like Figure 1 and Figure 2 As shown, this embodiment provides a crane 100, including a beam assembly 1 and a lifting mechanism 2, the beam assembly 1 includes a first main beam 11, a second main beam 12 and an end beam 13, the first main beam 11 and the second main beam 12 are connected by the end beam 13, the lifting mechanism 2 includes a push-pull assembly 21, a first pulley block 22, a second pulley block 23, a wire rope 25 and a hook 24, the push-pull assembly 21 is laid on the first main beam 11, the first pulley block 22 and the second pulley block 23 are respectively hung on the first main beam 11 and the second main beam 12, the wire rope 25 is sequentially wound around the first pulley block 22 and the second pulley block 23 from the execution end of the push-pull assembly 21, and the first pulley block 22 and the second pulley block 23 are both equipped with hooks 24. In this embodiment, the first main beam 11 and the second main beam 12 are arranged in parallel, the end beam 13 is erected at the ends of the first main beam 11 and the second main beam 12 and connected by bolts, the push-pull component 21 and the first pulley group 22 are installed on the first main beam 11, and the second pulley group 23 is installed on the second main beam 12. The wire rope 25 is sequentially wound around the execution end of the push-pull component 21, the first pulley group 22 and the second pulley group 23, and the hook 24 for hanging the bean-grain stone tank 200 is installed on the first pulley group 22 and the second pulley group 23. When performing the lifting work of the bean-grain stone jar 200, the push-pull assembly 21 loosens the wire rope 25 in the direction close to the first pulley block 22 to make the first pulley block 22 and the second pulley block 23 descend, so that the first pulley block 22 and the second pulley block 23 hook the bean-grain stone jar 200 with the hook 24, and then the push-pull assembly 21 pulls the wire rope 25 in the direction away from the first pulley block 22 to make the first pulley block 22 and the second pulley block 23 rise, so that the first pulley block 22 and the second pulley block 23 rise synchronously with the bean-grain stone jar 200 to complete the lifting work. The crane 100 can simultaneously drive the first pulley block 22 and the second pulley block 23 to lift or place the bean-grain stone jar 200 by only using one push-pull assembly 21, and the structure is compact, and the push-pull assembly 21 and the first pulley block 22 are arranged in an L shape, the flattening degree of the lifting mechanism 2 is high, and thus the headroom of the crane 100 is low.

[0040] Specifically, Figure 2 and Figure 3As shown, the push-pull assembly 21 includes a first driving member 211, a movable pulley 212 and a fixed pulley 213. The movable pulley 212 is slidably arranged on the first main beam 11 and is connected to the output end of the first driving member 211. The fixed pulley 213 is installed on the first main beam 11 and is located on the side of the movable pulley 212 close to the first pulley group 22. The wire rope 25 is sequentially wound around the movable pulley 212 and the fixed pulley 213 until it is wound around the first pulley group 22. The first driving member 211 can be set as a hydraulic cylinder, a pneumatic cylinder or an electric push rod, and the selection is made specifically according to the weight of the lifting material. In the present embodiment, the first driving member 211 is set as a hydraulic cylinder, and the hydraulic cylinder has a large lifting load. The movable pulley 212 is rotatably set on the bracket 2121. The bracket 2121 is connected to the output end of the hydraulic cylinder and a rolling shaft 2122 is set on the side wall of the bracket 2121. The rolling shaft 2122 is rotatably set on the first main beam 11. The fixed pulley 213 is located between the movable pulley 212 and the first pulley group 22. One end of the wire rope 25 is fixed on the first main beam 11 and is sequentially wound around the movable pulley 212 and the fixed pulley 213. When lifting or placing the bean-grain stone jar 200, the hydraulic cylinder pushes the movable pulley 212 in a direction close to the first pulley block 22, and the movable pulley 212 slides on the first main beam 11 in a direction close to the fixed pulley 213 to loosen the wire rope 25, and the first pulley block 22 and the second pulley block 23 descend and hook the bean-grain stone jar 200; then the hydraulic cylinder pulls the movable pulley 212 in a direction away from the first pulley block 22, and the movable pulley 212 slides on the first main beam 11 in a direction away from the fixed pulley 213 to pull the wire rope 25, and the first pulley block 22 and the second pulley block 23 rise and lift the bean-grain stone jar 200. In this embodiment, multiple turns of steel wire rope 25 are wound around the movable pulley 212 and the fixed pulley 213 until they are wound around the first pulley block 22. Since the tension of each steel wire rope 25 is equal, the hydraulic cylinder inputs tension from multiple strands of steel wire ropes 25 and outputs tension from one steel wire rope 25 to raise the first pulley block 22, which can increase the output power of the first drive member 211 and thereby improve the lifting efficiency.

[0041] In this embodiment, the first pulley group 22 includes a first lifting pulley 221 and a first swing pulley 222. The first lifting pulley 221 is used to install the hook 24, and the first swing pulley 222 is installed on the first main beam 11. The rotating axis of the first lifting pulley 221 is parallel to the end beam 13, and the rotating axis of the first swing pulley 222 is parallel to the first main beam 11. The wire rope 25 is sequentially wrapped around the first lifting pulley 221 and the first swing pulley 222 from the execution end of the push-pull assembly 21. Specifically, the first lifting pulley 221 is located below the first swing pulley 222. After the wire rope 25 is drawn out from the fixed pulley 213, it is sequentially wound around the first lifting pulley 221 away from the side of the first swing pulley 222, and then wound around the first swing pulley 222. The rotating shafts of the first lifting pulley 221 and the first swing pulley 222 are perpendicular to each other, so that the wire rope 25 is turned from the first pulley block 22 to the second pulley block 23, and the structure is simple. Of course, in other embodiments of the present invention, the rotating shafts of the second pulley block 23, the first lifting pulley 221, and the first swing pulley 222 are all set to be parallel to the first main beam 11, and the wire rope 25 can also be turned from the first pulley block 22 to the second pulley block 23, which will not be described in detail here. When the hydraulic cylinder pulls the movable pulley 212 in a direction away from the first pulley group 22, the movable pulley 212 slides on the first main beam 11 in a direction away from the fixed pulley 213 to pull the wire rope 25. The wire rope 25 is tightened and supports the first lifting pulley 221 from the side of the first lifting pulley 221 away from the first swing pulley 222. The first lifting pulley 221 rises and lifts the bean-grain stone jar 200.

[0042] As a preferred embodiment, the first pulley block 22 further includes a first balancing pulley 223, the rotation axis of the first balancing pulley 223 is parallel to the rotation axis of the first swing pulley 222, and the wire rope 25 is sequentially wound around one end of the first lifting pulley 221, the first balancing pulley 223, the other end of the first lifting pulley 221 and the first swing pulley 222. The wire rope 25 takes the first balancing pulley 223 as the intermediate transition and respectively passes around the two ends of the first lifting pulley 221, balancing the force of the first lifting pulley 221, thereby making the first lifting pulley 221 more stable when lifting the bean-grain stone jar 200, thereby improving reliability.

[0043] In this embodiment, the first pulley block 22 further includes a rotating frame 224, on which the first swing pulley 222 is rotatably arranged, and the rotating frame 224 is rotatably arranged on the first main beam 11, and the rotating axis of the rotating frame 224 is parallel to the rotating axis of the first lifting pulley 221. Specifically, the first balancing pulley 223 is also rotatably arranged on another rotating frame 224, and the structure is the same as that of the first swing pulley 222, and the rotating frame 224 realizes the rotation of the first swing pulley 222 and the first balancing pulley 223. When the bean-grain stone jar 200 is lifted, the first lifting pulley 221 swings, and the first swing pulley 222 and the first balancing pulley 223 also rotate in the same direction, so as to prevent the steel wire rope 25 from being disengaged from the first swing pulley 222 and the first balancing pulley 223 or being seriously worn, thereby improving reliability.

[0044] In this embodiment, the second pulley group 23 includes a second lifting pulley 231, a second swing pulley 232 and a second balancing pulley 233. The second lifting pulley 231 is used to install the hook 24. The second swing pulley 232 and the second balancing pulley 233 are installed on the second main beam 12. The wire rope 25 is sequentially wound from the first pulley group 22 through the second swing pulley 232, one end of the second lifting pulley 231, the second balancing pulley 233 and the other end of the second lifting pulley 231 until it is fixed on the beam assembly 1. The structural arrangement of the second swing pulley 232, the second lifting pulley 231 and the second balancing pulley 233 is the same as that of the first swing pulley 222, the first lifting pulley 221 and the first balancing pulley 223. The wire rope 25 is sequentially wound around the second swing pulley 232, the second lifting pulley 231, the second balancing pulley 233 and the second lifting pulley 231, and finally fixed on the beam assembly 1. When the first pulley group 22 rises, the second pulley group 23 rises synchronously; when the first pulley group 22 descends, the second pulley group 23 descends synchronously. The first pulley group 22 and the second pulley group 23 are symmetrically arranged, and the consistency of the lifting action is high.

[0045] Specifically, the second pulley block 23 further includes a steering pulley 234, which is rotatably arranged on the second main beam 12, and the wire rope 25 is wound from the other end of the second lifting pulley 231 through the steering pulley 234 away from the side of the hook 24 until it is fixed on the second main beam 12. The arrangement of the steering pulley 234 makes the structure of the lifting mechanism 2 more compact, and the ratio of the lifting mechanism 2 is 1. Of course, in other embodiments of the present invention, the arrangement of the steering pulley 234 can be selected according to the space limitation of the lifting mechanism 2 and the weight of the lifting material, which will not be repeated here.

[0046] like Figure 2 and Figure 4As shown, as a preferred embodiment, the lifting mechanism 2 is provided in two, and the two lifting mechanisms 2 are symmetrically arranged on the first main beam 11 and the second main beam 12. It can be understood that the push-pull assembly 21 and the first pulley block 22 of one of the two lifting mechanisms 2 are installed on the first main beam 11, and the second pulley block 23 is installed on the second main beam 12, and the push-pull assembly 21 and the first pulley block 22 of the other are installed on the second main beam 12, and the second pulley block 23 is installed on the first main beam 11. Of course, in other embodiments of the present invention, the lifting mechanism 2 can also be set to a desired number according to the lifting point and weight of the material.

[0047] like Figure 4 , Figure 5 and Figure 6 As shown, the crane 100 also includes a sliding mechanism 3, which includes a track 31, a second driving member 34, a gear 32 and a rack 33. The track 31 is slidably connected to the end beam 13, the second driving member 34 is installed on the end beam 13, the gear 32 is transmission-connected to the output end of the second driving member 34, the rack 33 is installed on the track 31, and the gear 32 is meshed with the rack 33. The second driving member 34 can be set as a motor or a pneumatic motor. In this embodiment, the second driving member 34 is a motor, and the gear 32 is transmission-connected to the output end of the motor. When the lifting mechanism 2 lifts the bean-grain stone jar 200, the motor drives the gear 32 to rotate, and then the end beam 13 slides in the track 31 to the target station, and then the lifting mechanism 2 can place the bean-grain stone jar 200 at the target station. The arrangement of the gear 32 and the rack 33 can prevent the sliding mechanism 3 from slipping, thereby improving reliability. Of course, the motor is installed on the track 31, the gear 32 is transmission-connected to the output end of the motor, and the rack 33 is installed on the end beam 13, which can also realize the sliding action of the end beam 13 and the lifting mechanism 2.

[0048] As a preferred embodiment, a slide groove 311 is provided on the side wall of the track 31, and a roller 131 is installed on the end beam 13, and the roller 131 is rollingly arranged in the slide groove 311. The inner wall of the end beam 13 is installed with a roller 131, and the number of rollers 131 can be 1, 2 or 3, etc., depending on actual needs. In this embodiment, the number of rollers 131 is set to 4, and the outer wall of the track 31 is provided with a slide groove 311, and the roller 131 is rollingly arranged in the slide groove 311, which reduces friction and can provide guidance for the sliding of the end beam 13.

[0049] In this embodiment, limit members 312 are provided at both ends of the track 31, and the limit members 312 can abut against the end beam 13 to limit the sliding position of the end beam 13. The limit members 312 are configured as position sensors or baffles. The limit members 312 in this embodiment are baffles, which are fixed to the ends of the track 31 by bolts, and the baffles can block the end beam 13 to limit the sliding position of the end beam 13, thereby improving reliability.

[0050] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", etc., and the like, are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0052] In addition, 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 crane, characterized in that: include: A crossbeam assembly (1), the crossbeam assembly (1) comprising a first main beam (11), a second main beam (12) and an end beam (13), the first main beam (11) and the second main beam (12) being connected via the end beam (13); A lifting mechanism (2), the lifting mechanism (2) comprising a push-pull assembly (21), a first pulley block (22), a second pulley block (23), a steel wire rope (25) and a hook (24), the push-pull assembly (21) being arranged horizontally on the first main beam (11), the first pulley block (22) and the second pulley block (23) being hung and installed on the first main beam (11) and the second main beam (12) respectively, the steel wire rope (25) being arranged from the execution end of the push-pull assembly (21) through the first pulley block (22) and the second pulley block (23) in sequence, the first pulley block (22) and the second pulley block (23) being both provided with the hook (24), and the push-pull assembly (21) and the first pulley block (22) being arranged in an L shape, and one push-pull assembly (21) can simultaneously drive the first pulley block (22) and the second pulley block (23) to lift or place materials; The second pulley group (23) comprises a second lifting pulley (231), a second swing pulley (232) and a second balancing pulley (233); the second lifting pulley (231) is used to install the hook (24); the second swing pulley (232) and the second balancing pulley (233) are installed on the second main beam (12); the steel wire rope (25) is sequentially wound from the first pulley group (22) through the second swing pulley (232), one end of the second lifting pulley (231), the second balancing pulley (233) and the other end of the second lifting pulley (231) until it is fixed on the crossbeam assembly (1).

2. The crane according to claim 1, characterized in that: The push-pull assembly (21) comprises a first driving member (211), a movable pulley (212) and a fixed pulley (213); the movable pulley (212) is slidably arranged on the first main beam (11) and connected to the output end of the first driving member (211); the fixed pulley (213) is installed on the first main beam (11) and is located on a side of the movable pulley (212) close to the first pulley group (22); the steel wire rope (25) is sequentially wound around the movable pulley (212) and the fixed pulley (213) until it is wound around the first pulley group (22).

3. The crane according to claim 1, characterized in that: The first pulley group (22) includes a first lifting pulley (221) and a first swing pulley (222), wherein the first lifting pulley (221) is used to install the hook (24), and the first swing pulley (222) is installed on the first main beam (11), and the rotation axis of the first lifting pulley (221) is parallel to the end beam (13), and the rotation axis of the first swing pulley (222) is parallel to the first main beam (11), and the steel wire rope (25) is sequentially wound around the first lifting pulley (221) and the first swing pulley (222) from the execution end of the push-pull component (21).

4. The crane according to claim 3, characterized in that: The first pulley group (22) also includes a first balancing pulley (223), the rotation axis of the first balancing pulley (223) is parallel to the rotation axis of the first swing pulley (222), and the steel wire rope (25) is sequentially wound around one end of the first lifting pulley (221), the first balancing pulley (223), the other end of the first lifting pulley (221) and the first swing pulley (222).

5. The crane according to claim 3, characterized in that: The first pulley group (22) also includes a rotating frame (224), the first swing pulley (222) is rotatably arranged on the rotating frame (224), the rotating frame (224) is rotatably arranged on the first main beam (11), and the rotating axis of the rotating frame (224) is parallel to the rotating axis of the first lifting pulley (221).

6. The crane according to claim 1, characterized in that: The second pulley group (23) also includes a steering pulley (234), which is rotatably set on the second main beam (12), and the steel wire rope (25) is passed from the other end of the second lifting pulley (231) around the steering pulley (234) away from the side of the hook (24) until it is fixed on the second main beam (12).

7. The crane according to claim 1, characterized in that: It also includes a sliding mechanism (3), wherein the sliding mechanism (3) includes: A track (31), wherein the track (31) is slidably connected to the end beam (13); a gear (32) and a rack (33), wherein one of the gear (32) and the rack (33) is mounted on the track (31), and the other is mounted on the end beam (13), and the gear (32) is meshed with the rack (33); A second driving member (34), wherein an output end of the second driving member (34) is drivingly connected to the gear (32).

8. The crane according to claim 7, characterized in that: A slide groove (311) is provided on the side wall of the track (31), a roller (131) is installed on the end beam (13), and the roller (131) is rollingly arranged in the slide groove (311).

9. The crane according to claim 7, characterized in that: Limiting members (312) are provided at both ends of the track (31), and the limiting members (312) can abut against the end beam (13) to limit the sliding position of the end beam (13).

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