Portable crane for building construction

Abstract

The utility model relates to the technical field of building construction, and discloses a portable crane for building construction, which comprises a lifting frame and a lifting device fixedly mounted on the upper side of the lifting frame, two bottom plates are arranged on the lower side of the lifting frame, and two first guide grooves are formed in the lower surface of the lifting frame. A second guide groove is formed in the upper surface of the bottom plate, through cooperation of a bidirectional threaded rod, a first connecting base, a second connecting base, a first lifting plate, a second lifting plate and other structures, pulleys can be stored into the grooves in the lifting process of the lifting frame, and when the lifting frame descends, the pulleys extend out of the grooves, so that the pulleys are prevented from falling into the grooves. Therefore, the operation steps of workers are reduced, the overall stability of the device is guaranteed during use, the moving convenience of the device is guaranteed during rotation, the practicability is high, and the flexibility is high.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a portable crane for building construction. Background Technology

[0002] A crane is a multi-action lifting machine that can vertically lift and horizontally move heavy objects within a certain range. In the construction process, it is often necessary to lift and transport various building materials and small equipment.

[0003] Some existing construction cranes are usually fixed in one place. However, as construction progresses, the installation location of the crane needs to be changed to better assist in the operation. However, because some existing construction cranes are generally large in size, it is very inconvenient to move them, which makes it difficult to carry and transport them. This limits their practical use, resulting in relatively poor flexibility and portability, and insufficient practicality. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a portable crane for construction, so as to solve the problem that some existing cranes are inconvenient to carry and transport.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a portable construction crane, comprising a lifting frame and a lifting device fixedly installed on the upper side of the lifting frame. Two base plates are provided on the lower side of the lifting frame. Two first guide grooves are formed on the lower surface of the lifting frame, and a second guide groove is formed on the upper surface of the base plates. Two first connecting seats are slidably connected inside the first guide grooves, and two second connecting seats are slidably connected inside the second guide grooves. A first lifting plate is rotatably connected between the left first connecting seat and the right second connecting seat via a shaft, and a second lifting plate is rotatably connected between the right first connecting seat and the left second connecting seat via a shaft. A guide rod is rotatably connected inside the second guide groove. The surface of the guide rod has four horizontal grooves and two spiral grooves. The second connecting seat is movably sleeved on the outside of the guide rod. A connecting rod is fixedly connected inside the second connecting seat, and the connecting rod is slidably connected inside the horizontal grooves and spiral grooves. A driving assembly is provided on the surface of the lifting frame. Two grooves are formed on the lower surface of the base plates. A connecting assembly is provided inside the grooves, and a pulley is provided inside the grooves.

[0006] Preferably, both of the first guide grooves are rotatably connected to bidirectional threaded rods, and the two first connecting seats are respectively threaded onto the two opposite threads of the bidirectional threaded rods.

[0007] Preferably, the first lifting plate has a through groove inside, and a section of the second lifting plate located inside the through groove is rotatably connected to the inside of the through groove via a shaft.

[0008] Preferably, the two spiral grooves are located between the two transverse grooves on both sides, and the spiral grooves are connected to the transverse grooves on both sides.

[0009] Preferably, the connecting assembly includes a support shaft, which is rotatably connected inside the groove. A fixing seat is fixedly sleeved on the surface of the support shaft. The fixing seat and the pulley are rotatably connected via the shaft body. An extension rod is rotatably connected inside the groove.

[0010] Preferably, the extension rod rotatably penetrates into the interior of the second guide groove and is fixedly connected to the guide rod. Both the extension rod and the support shaft are fixedly fitted with bevel gears, and two adjacent bevel gears mesh with each other.

[0011] Preferably, the drive assembly includes a motor, which is fixedly connected to the lifting frame. The lifting frame has a cavity inside, and two rotating rods are rotatably connected inside the cavity. The two rotating rods rotatably pass through the interior of two first guide slots and are fixedly connected to a bidirectional threaded rod. The output shaft of the motor rotatably passes through the interior of the cavity and is fixedly connected to the front rotating rod.

[0012] Preferably, a synchronous pulley is fixedly sleeved on the surface of each of the two rotating rods, and a synchronous belt is meshed between the surfaces of the two synchronous pulleys.

[0013] Compared with the prior art, the present invention provides a portable crane for construction, which has the following advantages:

[0014] This portable construction crane, through the cooperation of a double-threaded rod, a first connecting seat, a second connecting seat, a first lifting plate, and a second lifting plate, allows the pulleys to be retracted into the grooves during the lifting frame's ascent. When the lifting frame descends, the pulleys extend out of the grooves, thus reducing the number of steps required for workers. It ensures the overall stability of the device during use and the ease of movement during rotation, making it highly practical and flexible.

[0015] 2. This portable construction crane, through the cooperation of guide rods, bevel gears, support shafts, and fixed bases, further improves the flexibility of the device. It eliminates the need for additional operation by staff, automatically retracting and extending the pulleys, reducing operating steps and further enhancing the convenience and practicality of the device. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the portable construction crane of this utility model;

[0017] Figure 2 This is a schematic diagram of the lower structure of the lifting frame of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the base plate of this utility model;

[0019] Figure 4 This is a cross-sectional view of the second connecting seat of this utility model;

[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is a cross-sectional view of the groove structure of this utility model;

[0022] Figure 7 This is a cross-sectional view of the cavity structure of this utility model.

[0023] In the diagram: 1. Lifting frame; 2. Lifting device; 3. First guide groove; 4. Base plate; 5. Second guide groove; 6. Bidirectional threaded rod; 7. First lifting plate; 8. Second lifting plate; 9. Guide rod; 10. Horizontal groove;

[0024] 11. Spiral groove; 12. Connecting rod; 13. Groove; 14. Pulley; 15. Support shaft; 16. Fixed base; 17. Extension rod; 18. Bevel gear; 19. Cavity; 20. Rotating rod;

[0025] 21. Synchronous pulley; 22. Synchronous belt; 23. Motor;

[0026] 301, First connecting seat; 501, Second connecting seat; 701, Through slot. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-7This utility model provides a technical solution: a portable construction crane, including a lifting frame 1 and a lifting device 2 fixedly installed on the upper side of the lifting frame 1. Two base plates 4 are provided on the lower side of the lifting frame 1. The two base plates 4 have the same structure, so only one base plate 4 will be described below. Two first guide grooves 3 are formed on the lower surface of the lifting frame 1, and a second guide groove 5 is formed on the upper surface of the base plate 4. Two first connecting seats 301 are slidably connected inside the first guide grooves 3, and two second connecting seats 501 are slidably connected inside the second guide grooves 5. A first lifting device is rotatably connected between the left first connecting seat 301 and the right second connecting seat 501 via a shaft. A second lifting plate 8 is rotatably connected between the right first connecting seat 301 and the left second connecting seat 501 via a shaft. A guide rod 9 is rotatably connected inside the second guide groove 5. The surface of the guide rod 9 has four horizontal grooves 10 and two spiral grooves 11. The second connecting seat 501 is movably sleeved on the outside of the guide rod 9. A connecting rod 12 is fixedly connected inside the second connecting seat 501. The connecting rod 12 is slidably connected inside the horizontal grooves 10 and spiral grooves 11. A drive assembly is provided on the surface of the lifting frame 1. Two grooves 13 are provided on the lower surface of the base plate 4. A connecting assembly is provided inside the grooves 13. A pulley 14 is provided inside the grooves 13.

[0029] Among them, the lifting device 2 is existing technology, including structures such as winches, wire ropes and hooks, which are known to those skilled in the art, so its principle will not be described in detail.

[0030] Both first guide grooves 3 are rotatably connected to bidirectional threaded rods 6, and two first connecting seats 301 are respectively threaded onto two opposite threads of the bidirectional threaded rods 6.

[0031] The first lifting plate 7 has a through groove 701 inside, and a section of the second lifting plate 8 located inside the through groove 701 is rotatably connected to the inside of the through groove 701 via a shaft.

[0032] Two spiral grooves 11 are located between two transverse grooves 10 on both sides, and the spiral grooves 11 and the transverse grooves 10 on both sides are connected.

[0033] The connecting assembly includes a support shaft 15, which is rotatably connected inside the groove 13. A fixing seat 16 is fixedly sleeved on the surface of the support shaft 15. The fixing seat 16 and the pulley 14 are rotatably connected through the shaft. An extension rod 17 is rotatably connected inside the groove 13.

[0034] The extension rod 17 rotates through the interior of the second guide groove 5 and is fixedly connected to the guide rod 9. Both the extension rod 17 and the support shaft 15 are fixedly fitted with bevel gears 18, and two adjacent bevel gears 18 mesh with each other.

[0035] The drive assembly includes a motor 23, which is fixedly connected to the lifting frame 1. The lifting frame 1 has a cavity 19 inside, and two rotating rods 20 are rotatably connected inside the cavity 19. The two rotating rods 20 respectively rotate through the interior of the two first guide grooves 3 and are fixedly connected to the bidirectional threaded rods 6. The output shaft of the motor 23 rotates through the interior of the cavity 19 and is fixedly connected to the front rotating rod 20.

[0036] Among them, the motor 23 is also equipped with a power supply, wires, controller and microcomputer, etc. Since they are not the main structures, they will not be described in detail.

[0037] Both rotating rods 20 are fixedly fitted with synchronous pulleys 21, and the surfaces of the two synchronous pulleys 21 are meshed with synchronous belts 22.

[0038] Working principle:

[0039] When using this portable construction crane, workers move the device to a designated location using the lifting frame 1 and pulleys 14. Then, the motor 23 is turned on, and the rotation of the motor 23's output shaft drives the front rotating rod 20 to rotate. The synchronous rotation of the two rotating rods 20 is achieved by the synchronous pulleys 21 and 22, which in turn drives the rotation of the two bidirectional threaded rods 6. The rotation of the two bidirectional threaded rods 6 causes the two first connecting seats 301 to slide inside the first guide groove 3. Since the lengths of the first lifting plate 7 and the second lifting plate 8 are fixed, the movement of the first connecting seat 301 will cause the two second connecting seats 501 to move synchronously. At this time, the second connecting seats 501 will slide within the guide groove 3. The connecting rod 12 slides outward from the rod 9, while the connecting rod 12 first slides inside the transverse grooves 10 on both sides. Then, the connecting rod 12 enters the interior of the spiral groove 11. Since the movement trajectory of the second connecting seat 501 is restricted by the second guide groove 5 at this time, when the second connecting seat 501 moves, it will drive the guide rod 9 to rotate under the cooperation of the connecting rod 12 and the spiral groove 11. The rotation of the guide rod 9 can drive the rotation of the extension rod 17. The rotation of the extension rod 17 and the cooperation of the bevel gear 18 can realize the rotation of the support shaft 15. The rotation of the support shaft 15 can drive the movement of the fixed seat 16. The movement of the fixed seat 16 can realize the movement of the pulley 14. Finally, when the lifting frame 1 rises, the pulleys 14 on both sides will flip to both sides. At this time, the pulleys 14 will no longer be in contact with the ground.

[0040] When the device needs to be moved or transferred, the guide rod 9 will rotate in the opposite direction when the lifting frame 1 descends, which will cause the pulley 14 to flip in the opposite direction, so that the base plate 4 is away from the ground and the pulley 14 is in contact with the ground, thus making it easier for the staff to move the entire device.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable construction crane, comprising a lifting frame (1) and a lifting device (2) fixedly mounted on the upper side of the lifting frame (1), characterized in that: The lifting frame (1) has two base plates (4) on its lower side. The lower surface of the lifting frame (1) has two first guide grooves (3). The upper surface of the base plate (4) has a second guide groove (5). The first guide groove (3) has two first connecting seats (301) slidably connected inside. The second guide groove (5) has two second connecting seats (501) slidably connected inside. The first connecting seat (301) on the left and the second connecting seat (501) on the right are rotatably connected by a shaft. The first connecting seat (301) on the right and the second connecting seat (501) on the left are rotatably connected by a shaft. The second lifting plate (8) is rotatably connected by a shaft between the first connecting seat (301) on the right and the second connecting seat (501) on the left. The second guide groove (5) is rotatably connected to a guide rod (9). The surface of the guide rod (9) is provided with four horizontal grooves (10) and two spiral grooves (11). The second connecting seat (501) is movably sleeved on the outside of the guide rod (9). The second connecting seat (501) is fixedly connected to a connecting rod (12). The connecting rod (12) is slidably connected to the inside of the horizontal grooves (10) and the spiral grooves (11). The surface of the lifting frame (1) is provided with a driving assembly. The lower surface of the base plate (4) is provided with two grooves (13). The inside of the grooves (13) is provided with a connecting assembly. The inside of the grooves (13) is provided with a pulley (14).

2. The portable construction crane according to claim 1, characterized in that: Both of the first guide grooves (3) are rotatably connected to bidirectional threaded rods (6), and the two first connecting seats (301) are respectively threaded onto the two opposite threads of the bidirectional threaded rods (6).

3. The portable construction crane according to claim 1, characterized in that: The first lifting plate (7) has a through groove (701) inside, and the second lifting plate (8) is located inside the through groove (701). The second lifting plate (8) is rotatably connected to the inside of the through groove (701) by a shaft.

4. The portable construction crane according to claim 1, characterized in that: The two spiral grooves (11) are located between the two transverse grooves (10) on both sides, and the spiral grooves (11) and the transverse grooves (10) on both sides are connected.

5. The portable construction crane according to claim 1, characterized in that: The connecting assembly includes a support shaft (15), which is rotatably connected inside the groove (13). A fixing seat (16) is fixedly sleeved on the surface of the support shaft (15). The fixing seat (16) and the pulley (14) are rotatably connected through the shaft. An extension rod (17) is rotatably connected inside the groove (13).

6. The portable construction crane according to claim 5, characterized in that: The extension rod (17) rotates through the interior of the second guide groove (5) and is fixedly connected to the guide rod (9). Both the extension rod (17) and the support shaft (15) are fixedly fitted with bevel gears (18), and two adjacent bevel gears (18) mesh with each other.

7. The portable construction crane according to claim 1, characterized in that: The drive assembly includes a motor (23), which is fixedly connected to the lifting frame (1). The lifting frame (1) has a cavity (19) inside. Two rotating rods (20) are rotatably connected inside the cavity (19). The two rotating rods (20) respectively rotatably penetrate into the interior of two first guide grooves (3) and are fixedly connected to two bidirectional threaded rods (6). The output shaft of the motor (23) rotatably penetrates into the interior of the cavity (19) and is fixedly connected to the front rotating rod (20).

8. The portable construction crane according to claim 7, characterized in that: Both rotating rods (20) are fixedly fitted with synchronous pulleys (21), and the surfaces of the two synchronous pulleys (21) are meshed with synchronous belts (22).

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