Liftable cross beam of bridge crane

Abstract

The utility model relates to a liftable cross beam of a bridge crane, which comprises a cross beam body, side beams are arranged at the two ends of the cross beam body in the length direction, lifting grooves are formed in the tops of the two side beams, the two ends of the cross beam body are respectively inserted into the two lifting grooves, and inner grooves are formed in the two ends of the cross beam body. The top wall of the inner groove is rotationally connected with a threaded rod. An inner threaded sleeve is installed in the lifting groove, the threaded rods are in threaded connection with the interior of the inner threaded sleeve, and a driving mechanism capable of driving the two threaded rods to rotate at the same time is arranged in the cross beam body. A moving trolley is installed at the bottom of the beam body. Through the arrangement of the driving mechanism, the two threaded rods can be driven to rotate at the same time, so that the purpose of driving the cross beam body to ascend and descend can be achieved, and as the inner wall of the lifting groove plays a limiting role on the cross beam body, transverse acting force borne by the cross beam body can be resisted, and the structural strength between the cross beam body and the side beam is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a lifting beam of a bridge crane. Background Art

[0002] Bridge crane is a common lifting equipment, usually used in industry and construction sites. It consists of a bridge supported on both sides and a lifting mechanism that moves on the bridge. The bridge crane can move horizontally along the track on the bridge, and can also use the lifting mechanism to perform vertical lifting operations. This design enables the bridge crane to cover a wide range of working areas, with strong load-bearing capacity and stability, so it is widely used in various large-scale projects and production sites.

[0003] The Chinese patent with publication number CN215854678U discloses a liftable crossbeam for a bridge crane. The device can control the lifting and lowering adjustment of the beam body through a hydraulic lifting frame, which can expand its scope of use and is suitable for different working environments.

[0004] The above patent connects the beam body and the support platform together through a hydraulic lifting frame, and its connection strength is relatively low. When the crane encounters lateral force, it is easy to cause the hydraulic lifting frame to bend and deform, causing a safety hazard. Utility Model Content

[0005] The utility model aims to provide a bridge crane with a lifting beam which has high structural strength, can resist lateral force and has high safety.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is as follows.

[0007] A bridge crane can lift a crossbeam, including a crossbeam body, side beams are arranged at both ends of the crossbeam body in the length direction, lifting grooves are opened on the tops of the two side beams, the two ends of the crossbeam body are respectively inserted into the two lifting grooves, the two ends of the crossbeam body are opened with inner grooves, and the top wall of the inner groove is rotatably connected with a threaded rod. An internal threaded sleeve is installed inside the lifting groove, and the threaded rod is threadedly connected inside the internal threaded sleeve, and a driving mechanism capable of driving two threaded rods to rotate at the same time is arranged inside the crossbeam body. A moving trolley is installed at the bottom of the crossbeam body, and a winch is arranged inside the moving trolley. A steel wire rope is wound around the outer surface of the winch, and a sling is arranged at the end of the steel wire rope.

[0008] It can be seen that through the setting of the driving mechanism, the two threaded rods can be driven to rotate at the same time. Since the threaded rod and the internal threaded sleeve are threadedly connected, the purpose of driving the beam body to rise and fall can be achieved and its height can be adjusted. In addition, since the inner wall of the lifting groove plays a limiting role on the beam body, it can resist the lateral force exerted on the beam body, thereby ensuring the structural strength between the beam body and the side beam. In addition, since the two threaded rods rotate at the same time, the stability of the beam body during the lifting process can be guaranteed, avoiding the situation where one end is high and the other end is low, and the safety of use is high.

[0009] Furthermore, the driving mechanism includes a motor installed on the outer surface of the beam body, a rotating shaft is rotatably installed inside the beam body, and the output shaft of the motor is connected to the rotating shaft, two worms are installed on the outer surface of the rotating shaft, and worm wheels are sleeved on the outer surfaces of the two threaded rods, and the worms are meshingly connected with the worm wheels.

[0010] When the motor is started, its output shaft drives the rotating shaft to rotate. Due to the meshing relationship between the worm and the worm wheel, the two threaded rods can be driven to rotate at the same time, thereby achieving the purpose of driving the beam body to rise and fall. In addition, the worm and the worm wheel have good self-locking properties. Even if the motor fails, the height of the beam body will not change. In contrast, in the patent, if one side of the hydraulic lifting frame fails during the lifting of the beam, it may cause the beam to tilt and then overturn, posing a greater safety hazard.

[0011] Furthermore, a side rod is installed on the outer surface of the moving trolley, a linear bearing is installed inside the side rod, a guide rod is slidably installed inside the linear bearing, a connecting rod is installed at the bottom of the guide rod, and the end of the connecting rod is connected to the moving trolley.

[0012] When hoisting objects, the hoist drives the guide rod to slide up and down inside the linear bearing, and the guide rod can limit the hoist to prevent the objects from swinging, thereby improving the safety of hoisting objects.

[0013] Furthermore, both inner walls of the lifting groove are provided with limit sliding grooves, and the interiors of the two limit sliding grooves are provided with limit sliding blocks, and the ends of the two limit sliding blocks are connected to the outer surface of the beam body.

[0014] By setting the limit slide groove and the limit slider, the rising height of the beam body can be limited to prevent the beam body from rising too high and falling off from the inside of the lifting groove, causing a falling accident.

[0015] Furthermore, outer covers are installed on both sides of the side beam, electric push rods are installed inside the outer covers, and plug rods are connected to the ends of the telescopic ends of the electric push rods. Multiple plug holes are opened on both sides of the side beam.

[0016] After adjusting the beam body to the appropriate height, start the electric push rod. The telescopic end of the electric push rod drives the insertion rod to move so that it is inserted into the socket corresponding to its current position. The force is shared by the beam body through the insertion rod and the socket, thereby improving the overall structural strength and safety.

[0017] Furthermore, the number of the side rods is four, and the four side rods are arranged in groups of two on the outer surfaces of both sides of the moving trolley.

[0018] By setting four side rods, the spreader can be limited from four directions, which has a better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0021] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0022] Figure 4 for Figure 2 A magnified schematic diagram of B;

[0023] Figure 5 It is a structural schematic diagram of the insertion rod and the insertion hole in the utility model.

[0024] In the figure: 100, side beam; 101, lifting groove; 102, crossbeam body; 103, inner groove; 104, threaded rod; 105, internal threaded sleeve; 106, moving trolley; 107, wire rope; 108, lifting device; 200, driving mechanism; 201, motor; 202, rotating shaft; 203, worm; 204, worm wheel; 300, side rod; 301, linear bearing; 302, connecting rod; 303, guide rod; 400, limiting slide groove; 401, limiting slider; 500, outer cover; 501, electric push rod; 502, plug rod; 503, socket. DETAILED DESCRIPTION

[0025] The utility model is described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-5As shown, a bridge crane can lift a cross beam, including a cross beam body 102, side beams 100 are arranged at both ends of the cross beam body 102 in the length direction, and lifting grooves 101 are opened on the tops of the two side beams 100, and the two ends of the cross beam body 102 are respectively inserted into the two lifting grooves 101, and the two ends of the cross beam body 102 are opened. The inner groove 103 is opened at both ends of the cross beam body 102, and the top wall of the inner groove 103 is rotatably connected with a threaded rod 104. An internal threaded sleeve 105 is installed inside the lifting groove 101, and the threaded rod 104 is threadedly connected inside the internal threaded sleeve 105. A driving mechanism 200 capable of driving the two threaded rods 104 to rotate at the same time is arranged inside the cross beam body 102. A moving trolley 106 is installed at the bottom of the cross beam body 102, and a winch is arranged inside the moving trolley 106. A steel wire rope 107 is wound around the outer surface of the winch, and a sling 108 is arranged at the end of the steel wire rope 107.

[0027] When the height of the beam body 102 needs to be adjusted during use, the driving mechanism 200 can be used to drive the two threaded rods 104 to rotate simultaneously. Since the lifting groove 101 limits the beam body 102 and the threaded rod 104 is threadedly connected to the internal threaded sleeve 105, the beam body 102 can be driven to move up and down during the rotation of the threaded rod 104 to adjust its height. When hoisting objects, the hoisting device 108 can be lowered by the winch, and after the objects are hoisted, the wire rope 107 can be reeled in by the winch to drive the objects to rise and achieve the hoisting purpose.

[0028] Specifically, the driving mechanism 200 includes a motor 201 installed on the outer surface of the beam body 102, a rotating shaft 202 is rotatably installed inside the beam body 102, and the output shaft of the motor 201 is connected to the rotating shaft 202, two worms 203 are installed on the outer surface of the rotating shaft 202, and the outer surfaces of the two threaded rods 104 are sleeved with worm wheels 204, and the worm 203 is meshingly connected with the worm wheels 204. When the motor 201 is started, its output shaft drives the rotating shaft 202 to rotate. Due to the meshing relationship between the worm 203 and the worm wheel 204, the two threaded rods 104 can be driven to rotate at the same time, thereby achieving the purpose of driving the beam body 102 to rise and fall, and the worm 203 and the worm wheel 204 have good self-locking properties. Even if the motor 201 fails, the height of the beam body 102 will not change. In the comparative patent, if one side of the hydraulic lifting frame fails during the lifting of the beam body, it may cause the beam body to tilt and then overturn, which has a greater safety hazard.

[0029] Specifically, a side rod 300 is installed on the outer surface of the mobile trolley 106, and a linear bearing 301 is installed inside the side rod 300. A guide rod 303 is slidably installed inside the linear bearing 301. A connecting rod 302 is installed at the bottom of the guide rod 303, and the end of the connecting rod 302 is connected to the mobile trolley 106. During the process of hoisting objects, the sling 108 drives the guide rod 303 to slide up and down inside the linear bearing 301, and the guide rod 303 can limit the sling 108 to prevent it from driving the objects to swing, thereby improving the safety of hoisting objects.

[0030] Specifically, the inner walls on both sides of the lifting groove 101 are provided with limiting grooves 400, and limiting sliders 401 are arranged inside the two limiting grooves 400. The ends of the two limiting sliders 401 are connected to the outer surface of the beam body 102. Through the setting of the limiting grooves 400 and the limiting sliders 401, the rising height of the beam body 102 can be limited to prevent the beam body 102 from rising too high and falling off from the inside of the lifting groove 101, causing a falling accident.

[0031] Specifically, outer covers 500 are installed on the outer surfaces of both sides of the side beam 100, and electric push rods 501 are installed inside the outer covers 500. The ends of the telescopic ends of the electric push rods 501 are connected to the insertion rods 502. Multiple sockets 503 are opened on the outer surfaces of both sides of the side beam 100. After the beam body 102 is adjusted to a suitable height, the electric push rods 501 are started, and the telescopic ends of the electric push rods 501 drive the insertion rods 502 to move so that they are inserted into the sockets 503 corresponding to their current positions. The force of the beam body 102 is shared by the insertion rods 502 and the sockets 503, thereby improving the overall structural strength and safety.

[0032] Specifically, there are four side rods 300, and the four side rods 300 are arranged in groups of two on the outer surfaces of both sides of the moving trolley 106. Through the arrangement of the four side rods 300, the sling 108 can be limited from four directions, and the use effect is better.

[0033] The above is a detailed description of the utility model in combination with specific embodiments, and it cannot be determined that the specific implementation methods of the utility model are limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, making several equivalent substitutions or obvious modifications without departing from the concept of the utility model, and having the same performance or use, should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. A bridge crane capable of lifting a crossbeam, comprising a crossbeam body (102), characterized in that: Both ends of the crossbeam body (102) in the length direction are provided with side beams (100), the tops of the two side beams (100) are provided with lifting grooves (101), the two ends of the crossbeam body (102) are respectively inserted into the two lifting grooves (101), and both ends of the crossbeam body (102) are provided with inner grooves (103), and the top wall of the inner groove (103) is rotatably connected to a threaded rod (104); An internal threaded sleeve (105) is installed inside the lifting groove (101), and the threaded rod (104) is threadedly connected inside the internal threaded sleeve (105), and a driving mechanism (200) capable of driving the two threaded rods (104) to rotate simultaneously is arranged inside the crossbeam body (102); A movable trolley (106) is installed at the bottom of the crossbeam body (102), a winch is arranged inside the movable trolley (106), a steel wire rope (107) is wound around the outer surface of the winch, and a sling (108) is arranged at the end of the steel wire rope (107).

2. The bridge crane liftable crossbeam according to claim 1, characterized in that: The driving mechanism (200) comprises a motor (201) mounted on the outer surface of the crossbeam body (102); a rotating shaft (202) is rotatably mounted inside the crossbeam body (102); an output shaft of the motor (201) is connected to the rotating shaft (202); two worms (203) are mounted on the outer surface of the rotating shaft (202); worm wheels (204) are sleeved on the outer surfaces of the two threaded rods (104); and the worms (203) are meshingly connected to the worm wheels (204).

3. The bridge crane liftable crossbeam according to claim 2, characterized in that: A side rod (300) is installed on the outer surface of the moving trolley (106), a linear bearing (301) is installed inside the side rod (300), a guide rod (303) is slidably installed inside the linear bearing (301), a connecting rod (302) is installed at the bottom of the guide rod (303), and the end of the connecting rod (302) is connected to the moving trolley (106).

4. The bridge crane liftable crossbeam according to claim 3, characterized in that: The inner walls on both sides of the lifting groove (101) are provided with limit sliding grooves (400), the interiors of the two limit sliding grooves (400) are provided with limit sliding blocks (401), and the ends of the two limit sliding blocks (401) are connected to the outer surface of the crossbeam body (102).

5. The bridge crane liftable crossbeam according to claim 4, characterized in that: The outer surfaces of both sides of the side beam (100) are both installed with outer covers (500), an electric push rod (501) is installed inside the outer cover (500), the end of the telescopic end of the electric push rod (501) is connected to an insertion rod (502), and the outer surfaces of both sides of the side beam (100) are both provided with a plurality of insertion holes (503).

6. The bridge crane liftable crossbeam according to claim 5, characterized in that: The number of the side bars (300) is four, and the four side bars (300) are arranged in groups of two on the outer surfaces of both sides of the moving vehicle (106).

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