Height-adjustable portal crane

Abstract

The utility model discloses a height-adjustable portal crane which comprises a mounting frame, a fixing plate is fixedly connected to the middle of the upper end of the mounting frame, a rope elevator is fixedly mounted at the upper end of the fixing plate, a hook is fixedly connected to the rope extending end of the rope elevator, two mounting plates are arranged below the mounting frame, and the two mounting plates are fixedly connected to the lower end of the mounting frame. The mounting plates are connected with the mounting frame in a sliding mode through sliding assemblies, an adjusting mechanism is arranged between the two mounting plates, bottom plates are arranged below the two mounting plates, and the two bottom plates are connected with the two mounting plates through lifting mechanisms respectively. The crane can be suitable for objects with different heights conveniently, meanwhile, the distance between the two mounting plates can be controlled through the adjusting mechanism, the adjusting mechanism can control the moving range of the mounting plates to be large, and therefore the crane can be suitable for more working environments with different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a height-adjustable gantry crane. Background Art

[0002] Gantry cranes are mainly used for loading and unloading of outdoor cargo yards, material yards, and bulk cargo. Its metal structure is like a door-shaped frame, with two legs installed under the main beam, which can walk directly on the ground track, and the two ends of the main beam can have outward cantilever beams. The deformable gantry crane has the characteristics of high site utilization, large operating range, wide adaptability, and strong versatility, and is widely used in port cargo yards.

[0003] According to a Chinese patent document with announcement number CN113845042U, a height-adjustable small gantry crane and a method for using the same are disclosed. The height-adjustable small gantry crane solves the problem that the frame of the existing crane does not have the function of lifting, that is, some goods cannot be lifted normally when the frame working height is not enough, and at the same time, the support rods on both sides of the existing crane are mostly spaced at a fixed distance, resulting in the crane being only suitable for working environments of specific sizes and unable to meet various work requirements.

[0004] However, the distance that the adjusting chamber that controls the distance between the support rods on both sides of the crane can control the movement of the support rods is very limited, so that the range of the distance between the support rods on both sides of the crane can be adjusted is very limited, and thus the range of working environments that the crane can adapt to is still very limited. Therefore, a height-adjustable gantry crane is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a height-adjustable gantry crane to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a height-adjustable gantry crane, comprising a mounting frame, a fixing plate fixedly connected to the middle part of the upper end of the mounting frame, a rope hoist fixedly installed on the upper end of the fixing plate, a hook fixedly connected to the rope protruding end of the rope hoist, two mounting plates are arranged below the mounting frame, the mounting plates are slidably connected to the mounting frame through a sliding assembly, an adjustment mechanism is arranged between the two mounting plates, a bottom plate is arranged below the two mounting plates, the two bottom plates are respectively connected to the two mounting plates through a lifting mechanism, and two universal wheels are respectively arranged on both sides of the bottom of the bottom plate.

[0007] As a further preferred embodiment of the present technical solution, the adjusting mechanism is composed of a No. 2 double-headed motor, a No. 2 lead screw and a vertical plate, a No. 2 double-headed motor is arranged between the two mounting plates, the No. 2 double-headed motor is fixedly mounted on the bottom of the mounting frame, the ends of the two output shafts of the No. 2 double-headed motor are fixedly connected with the No. 2 lead screw, the other ends of the two No. 2 lead screws respectively pass through the two mounting plates and are respectively connected to the two mounting plates by threaded cooperation, the ends of the two No. 2 lead screws are fixedly connected with the vertical plates, and the two vertical plates are fixedly connected to the bottom of the mounting frame.

[0008] As a further preferred embodiment of the present technical solution, the thread rotation directions of the two No. 2 lead screws are opposite.

[0009] As a further preferred embodiment of the present technical solution, the sliding assembly includes a movable block, and two movable blocks are fixedly connected to the upper end of the mounting plate, and the two movable blocks are slidably mounted in a movable groove opened at the bottom of the mounting plate.

[0010] As a further preferred embodiment of the present technical solution, the lifting mechanism is composed of a double-headed motor No. 1, a lead screw No. 1, a slider and a support column, the double-headed motor No. 1 is fixedly connected to the middle part of the base plate, the two output ends of the double-headed motor No. 1 are respectively fixedly connected to the lead screw No. 1, the two ends of the two lead screws No. 1 are respectively rotatably connected in two slide grooves opened at the upper end of the base plate, the two slide grooves are symmetrically distributed on both sides of the double-headed motor No. 1, sliders are respectively slidably installed in the two slide grooves, the two lead screws No. 1 respectively penetrate the two sliders and are respectively connected to the two sliders by threaded cooperation, the upper ends of the two sliders are rotatably connected to the support columns, and the other ends of the two support columns are rotatably connected to the bottom of the mounting plate.

[0011] As a further preferred embodiment of the present technical solution, the thread rotation directions of the two No. 1 lead screws are opposite.

[0012] As a further preferred embodiment of the present technical solution, the two support columns are distributed in an eight-shaped shape.

[0013] The utility model provides a height-adjustable gantry crane, which has the following beneficial effects:

[0014] The utility model can control the height of the mounting frame through the lifting mechanism, so that the crane can be suitable for objects of different heights. At the same time, the distance between the two mounting plates can be controlled by the adjusting mechanism, and the adjusting mechanism can control the movement range of the mounting plates to be very large, so that the crane can be suitable for more working environments of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the utility model;

[0017] Figure 3 It is a front view of the overall structure of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the lifting mechanism in the utility model;

[0019] In the figure: 1. mounting frame; 2. fixing plate; 3. rope lift; 4. bottom plate; 5. support column; 6. universal wheel; 7. mounting plate; 8. No. 1 double-headed motor; 9. No. 1 lead screw; 10. slide groove; 11. slider; 12. hook; 13. No. 2 double-headed motor; 14. No. 2 lead screw; 15. vertical plate; 16. movable block; 17. movable groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] The utility model provides a technical solution: Figures 1 to 4 As shown, in this embodiment, a height-adjustable gantry crane includes a mounting frame 1, a fixing plate 2 is fixedly connected to the middle of the upper end of the mounting frame 1, a rope hoist 3 is fixedly installed on the upper end of the fixing plate 2, a hook 12 is fixedly connected to the rope protruding end of the rope hoist 3, two mounting plates 7 are arranged below the mounting frame 1, the mounting plates 7 are slidably connected to the mounting frame 1 through a sliding assembly, an adjustment mechanism is arranged between the two mounting plates 7, bottom plates 4 are arranged below the two mounting plates 7, the two bottom plates 4 are respectively connected to the two mounting plates 7 through a lifting mechanism, and two universal wheels 6 are respectively arranged on both sides of the bottom of the bottom plate 4.

[0022] The adjusting mechanism is composed of a No. 2 double-headed motor 13, a No. 2 lead screw 14 and a vertical plate 15. The No. 2 double-headed motor 13 is arranged between the two mounting plates 7. The No. 2 double-headed motor 13 is fixedly mounted on the bottom of the mounting frame 1. The ends of the two output shafts of the No. 2 double-headed motor 13 are fixedly connected with the No. 2 lead screw 14. The threads of the two No. 2 lead screws 14 have opposite rotation directions. The other ends of the two No. 2 lead screws 14 respectively pass through the two mounting plates 7 and are connected to the two mounting plates 7 by threaded cooperation. The ends of the two No. 2 lead screws 14 are fixedly connected with the vertical plate 15. The two vertical plates 15 are fixedly connected to the bottom of the mounting frame 1.

[0023] When in use, start the No. 2 double-headed motor 13 to drive the two No. 2 lead screws 14 to rotate, and the mounting plate 7 is restricted by the sliding component and cannot rotate. When the two No. 2 lead screws 14 with opposite thread rotation directions rotate, the two mounting plates 7 will move closer to or away from each other, thereby controlling the distance between the two base plates 4, so that the crane can be applied to more working environments of different sizes. The universal wheels 6 at the bottom of the base plate 4 can ensure that the two mounting plates 7 are not hindered by the ground when moving.

[0024] The sliding assembly includes a movable block 16 . The upper end of the mounting plate 7 is fixedly connected with two movable blocks 16 . The two movable blocks 16 are slidably mounted in a movable groove 17 formed at the bottom of the mounting plate 7 .

[0025] The sliding fit between the spring movable block 16 and the movable groove 17 can slide and connect the mounting plate 7 to the bottom of the mounting frame 1 .

[0026] Among them, the lifting mechanism is composed of a No. 1 double-headed motor 8, a No. 1 lead screw 9, a slider 11 and a support column 5. The No. 1 double-headed motor 8 is fixedly connected to the middle part of the base plate 4. The two output ends of the No. 1 double-headed motor 8 are respectively fixedly connected to the No. 1 lead screw 9. The threads of the two No. 1 lead screws 9 have opposite rotation directions. The two ends of the two No. 1 lead screws 9 are respectively rotatably connected in two slide grooves 10 opened at the upper end of the base plate 4. The two slide grooves 10 are symmetrically distributed on both sides of the No. 1 double-headed motor 8. Slide blocks 11 are respectively slidably installed in the two slide grooves 10. The two No. 1 lead screws 9 respectively penetrate the two sliders 11 and are respectively connected to the two sliders 11 by threaded cooperation. The upper ends of the two sliders 11 are rotatably connected to the support columns 5. The other ends of the two support columns 5 are rotatably connected to the bottom of the mounting plate 7. The two support columns 5 are distributed in an eight-shaped shape.

[0027] When in use, start the No. 1 double-headed motor 8 to drive the two No. 1 lead screws 9 to rotate, thereby controlling the two sliders 11 to move closer to or away from each other. When the two sliders 11 move closer to each other, the two support columns 5 will change to a vertical state, thereby increasing the height of the mounting frame 1, and making it easier for the crane to be used for objects of different heights.

[0028] The utility model provides a height-adjustable gantry crane, and the specific working principle is as follows:

[0029] When in use, start the No. 1 double-headed motor 8 to drive the two No. 1 lead screws 9 to rotate, thereby controlling the two sliders 11 to move closer to or away from each other. When the two sliders 11 move closer to each other, the two support columns 5 will change to a vertical state, thereby increasing the height of the mounting frame 1, and making it convenient for the crane to be suitable for objects of different heights. Start the No. 2 double-headed motor 13 to drive the two No. 2 lead screws 14 to rotate, and the mounting plate 7 cannot rotate due to the restriction of the sliding assembly. When the two No. 2 lead screws 14 with opposite thread rotation directions rotate, the two mounting plates 7 will move closer to or away from each other, thereby controlling the distance between the two base plates 4, so that the crane can be suitable for more working environments of different sizes. The universal wheels 6 at the bottom of the base plate 4 can ensure that the two mounting plates 7 are not hindered by the ground when moving.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable gantry crane, comprising a mounting frame (1), characterized in that: A fixing plate (2) is fixedly connected to the middle of the upper end of the mounting frame (1), a rope hoist (3) is fixedly installed on the upper end of the fixing plate (2), a hook (12) is fixedly connected to the rope protruding end of the rope hoist (3), two mounting plates (7) are arranged below the mounting frame (1), the mounting plates (7) are slidably connected to the mounting frame (1) through a sliding assembly, an adjustment mechanism is arranged between the two mounting plates (7), a bottom plate (4) is arranged below the two mounting plates (7), the two bottom plates (4) are respectively connected to the two mounting plates (7) through a lifting mechanism, and two universal wheels (6) are respectively arranged on both sides of the bottom of the bottom plate (4).

2. A height-adjustable gantry crane according to claim 1, characterized in that: The adjustment mechanism is composed of a No. 2 double-headed motor (13), a No. 2 lead screw (14) and a vertical plate (15). The No. 2 double-headed motor (13) is arranged between the two mounting plates (7). The No. 2 double-headed motor (13) is fixedly mounted on the bottom of the mounting frame (1). The ends of the two output shafts of the No. 2 double-headed motor (13) are fixedly connected to the No. 2 lead screw (14). The other ends of the two No. 2 lead screws (14) respectively penetrate the two mounting plates (7) and are respectively connected to the two mounting plates (7) by threaded engagement. The ends of the two No. 2 lead screws (14) are fixedly connected to the vertical plate (15). The two vertical plates (15) are fixedly connected to the bottom of the mounting frame (1).

3. A height-adjustable gantry crane according to claim 2, characterized in that: The threads of the two second lead screws (14) are in opposite directions.

4. A height-adjustable gantry crane according to claim 1, characterized in that: The sliding assembly comprises a movable block (16), the upper end of the mounting plate (7) is fixedly connected with two movable blocks (16), and the two movable blocks (16) are slidably mounted in a movable groove (17) provided at the bottom of the mounting plate (7).

5. The height-adjustable gantry crane according to claim 1, characterized in that: The lifting mechanism is composed of a No. 1 double-headed motor (8), a No. 1 lead screw (9), a slider (11) and a support column (5). The No. 1 double-headed motor (8) is fixedly connected to the middle part of the base plate (4). The two output ends of the No. 1 double-headed motor (8) are respectively fixedly connected to the No. 1 lead screw (9). The two ends of the two No. 1 lead screws (9) are respectively rotatably connected to two slide grooves (10) opened at the upper end of the base plate (4). The two slide grooves (10) are symmetrically distributed on both sides of the No. 1 double-headed motor (8). Slide blocks (11) are respectively slidably installed in the two slide grooves (10). The two No. 1 lead screws (9) respectively penetrate the two slide blocks (11) and are respectively connected to the two slide blocks (11) by threaded cooperation. The upper ends of the two slide blocks (11) are both rotatably connected to the support column (5). The other ends of the two support columns (5) are both rotatably connected to the bottom of the mounting plate (7).

6. A height-adjustable gantry crane according to claim 5, characterized in that: The threads of the two No. 1 lead screws (9) are in opposite directions.

7. The height-adjustable gantry crane according to claim 5, characterized in that: The two support columns (5) are distributed in an eight-shaped shape.

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