A double-beam electric hoist portal crane

Abstract

The utility model discloses a double-beam electric hoist portal crane, including main beam, the both ends of main beam are provided with end beam, and the bottom of main beam is installed with electric hoist, and the bottom of main beam is provided with two track beams, and the electric hoist includes mounting bracket, and the reel is rotatably connected on the mounting bracket, and the hoist is provided below the reel, and the speed reducer motor is provided at one end of the reel, and the brake is provided at the other end of the reel, the top of mounting bracket is fixedly connected with two running frames, and each running frame corresponds to a track beam, and each running frame includes two oppositely arranged mounting plates, and the inboard of mounting plate is rotatably connected with running wheel, and two running wheels run at the both sides of track beam respectively, and the outboard mounting plate is provided with running motor, the utility model adopts the structure of double track beams, improves the stability when electric hoist runs, when unilateral derailment occurs, the crane has time to place the object to the safe place, avoids the emergence of large-scale safety accidents.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery technology, and in particular to a double-girder electric hoist gantry crane. Background Technology

[0002] Gantry cranes are primarily used for loading and unloading cargo and bulk materials in outdoor freight yards and material yards. They offer advantages such as high site utilization, large operating range, wide adaptability, and strong versatility. However, most existing gantry cranes use a single-beam structure for their electric hoists. This structure limits the crane's load capacity, and if the object being lifted is heavy, the electric hoist is prone to derailment, affecting production safety. Utility Model Content

[0003] The purpose of this utility model is to provide a double-beam electric hoist gantry crane. The crane adopts a double-track beam structure, which improves the stability of the electric hoist during operation. In the event of derailment on one side, the crane has time to place the object in a safe location, thus avoiding a major safety accident.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a double-girder electric hoist gantry crane, comprising a main beam and a trolley traveling mechanism, with outriggers provided between the main beam and the trolley traveling mechanism, an electric hoist installed at the bottom of the main beam, and two track beams provided at the bottom of the main beam, the electric hoist including a mounting frame, a drum rotatably connected to the mounting frame, a lifting device provided below the drum, the lifting device being connected to the drum via a wire rope, a reduction motor provided at one end of the drum, and a brake provided at the other end of the drum, both the reduction motor and the brake being fixedly connected to the mounting frame; two traveling frames are fixedly connected to the top of the mounting frame, each traveling frame corresponding to one track beam, each traveling frame including two oppositely arranged mounting plates, with traveling wheels rotatably connected to the inner side of the mounting plates, the two traveling wheels running on both sides of the track beam respectively, and a traveling motor provided on the outer mounting plate.

[0005] Optionally, limit plates are fixedly connected to both sides of the bottom of the track beam, and horizontally arranged limit wheels are rotatably connected to the inner side of the mounting plate, with the limit wheels fitting against the limit plates.

[0006] Optionally, the lifting device is symmetrically equipped with two movable pulleys, and a wire rope is installed at each end of the drum. The two wire ropes correspond to the two movable pulleys. One end of the wire rope is fixedly connected to the drum, and the other end of the wire rope is fixedly connected to the bottom of the mounting frame after passing through the drum and the movable pulleys.

[0007] Optionally, a tie rod is provided between the two mounting plates that are positioned opposite each other.

[0008] Optionally, the axis of the drum is parallel to the axis of the traveling wheel.

[0009] The double-girder electric hoist gantry crane of this utility model has the following advantages: (1) The top of the electric hoist is equipped with two traveling frames, which are matched with two track beams respectively, thereby improving the load capacity of the crane. When one traveling frame derails, the other traveling frame can still maintain the operation of the electric hoist, providing operation time for putting down objects, avoiding the occurrence of major accidents, and improving production safety.

[0010] (2) The combination of the limit wheel and the limit plate can further improve the stability of the electric hoist operation.

[0011] (3) The symmetrically arranged movable pulleys and wire ropes can ensure that the lifting device is always directly below the drum, and the center of gravity is not easily shifted. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] like Figures 1-2 As shown, a double-girder electric hoist gantry crane includes a main beam 1 and a trolley traveling mechanism. Support legs are provided between the main beam 1 and the trolley traveling mechanism. An electric hoist is installed at the bottom of the main beam. The trolley traveling mechanism and support legs are not shown in the figure. Two parallel track beams 2 are provided at the bottom of the main beam 1, and the electric hoist runs on the track beams 2. The electric hoist includes a mounting frame 3, on which a drum is rotatably connected. A reduction motor 4 is provided at one end of the drum, and a brake 5 is provided at the other end. Both the reduction motor 4 and the brake 5 are fixedly connected to the mounting frame 3. The axial direction of the drum is perpendicular to the direction of the track beams 2, which reduces the width of the electric hoist and allows it to have a larger lateral travel.

[0016] Two traveling frames 6 are fixedly connected to the top of the mounting frame 3. Each traveling frame 6 corresponds to a track beam 2. Each traveling frame 6 includes two opposing mounting plates 7. Traveling wheels 8 are rotatably connected to the inner side of the mounting plate 7. The two traveling wheels 8 run on both sides of the track beam 2. A traveling motor 9 is installed on the outer mounting plate 7. Limiting plates 10 are fixedly connected to both sides of the bottom of each track beam 2. Horizontally arranged limiting wheels 11 are rotatably connected to the inner side of the mounting plate 7. The traveling motor 9 drives the traveling wheels 8 to rotate, and the limiting wheels 11 on both sides rotate against the limiting plates 10, ensuring that the electric hoist will not jam, twist, or tilt, thus improving the stability of the electric hoist's operation. A tie rod 12 is installed between the two opposing mounting plates 7. The tie rod 12 can improve the strength of the two mounting plates 7 and ensure that the distance between the traveling wheels 8 is stable when the object is heavy, preventing derailment.

[0017] A lifting device 13 is installed below the drum, and two movable pulleys 14 are symmetrically arranged on the lifting device 13. A wire rope 15 is installed at each end of the drum, and the two wire ropes 15 correspond to the two movable pulleys 14. One end of the wire rope 15 is fixedly connected to the drum, and the other end of the wire rope 15 passes around the drum and the movable pulleys 14 and is fixedly connected to the bottom of the mounting frame 3. This ensures that the lifting device 13 is always located directly below the drum and that there is no shift in the center of gravity, thereby improving the stability during lifting.

[0018] The two traveling frames 6 of the electric hoist cooperate with the two track beams 2 at the bottom of the main beam 1, which improves the load-bearing capacity of the crane. Moreover, the two traveling frames 6 are independent structures. When one traveling frame 6 derails, the other traveling frame 6 can still operate normally, providing operation time for the lifting device 13 to safely lower the object, avoiding safety accidents and improving production safety.

[0019] The embodiments described above are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

Claims

1. A double-girder electric hoist gantry crane, comprising a main girder and a trolley traveling mechanism, wherein outriggers are provided between the main girder and the trolley traveling mechanism, and an electric hoist is installed at the bottom of the main girder, characterized in that: Two track beams are installed at the bottom of the main beam. The electric hoist includes a mounting frame, on which a drum is rotatably connected. A lifting device is installed below the drum and connected to the drum via a wire rope. A geared motor is installed at one end of the drum, and a brake is installed at the other end. Both the geared motor and the brake are fixedly connected to the mounting frame. Two traveling frames are fixedly connected to the top of the mounting frame. Each traveling frame corresponds to one track beam. Each traveling frame includes two oppositely arranged mounting plates. Traveling wheels are rotatably connected to the inner side of the mounting plates. The two traveling wheels run on both sides of the track beam. A traveling motor is installed on the outer mounting plate.

2. The double-girder electric hoist gantry crane as described in claim 1, characterized in that: Limiting plates are fixedly connected to both sides of the bottom of the track beam, and horizontally set limiting wheels are rotatably connected to the inner side of the mounting plate, with the limiting wheels fitting against the limiting plates.

3. The double-girder electric hoist gantry crane as described in claim 1, characterized in that: The lifting device has two symmetrically arranged movable pulleys. A wire rope is installed at each end of the drum. The two wire ropes correspond to the two movable pulleys. One end of the wire rope is fixedly connected to the drum, and the other end of the wire rope is fixedly connected to the bottom of the installation frame after passing through the drum and the movable pulleys.

4. The double-girder electric hoist gantry crane as described in claim 1, characterized in that: A tie rod is installed between the two mounting plates that are positioned opposite each other.

5. The double-girder electric hoist gantry crane as described in claim 1, characterized in that: The axis of the drum is parallel to the axis of the traveling wheel.

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