Portal frame crane with adjusting function

Abstract

The portal frame crane with the adjusting function comprises two adjusting seats and a cross beam, two sliding blocks are connected to the interior of each adjusting seat in a sliding mode, and a supporting leg is movably hinged to the upper surface of each sliding block through a first hinge seat. The top end of each supporting leg is hinged to the bottom face of the cross beam through a second hinge seat, a screw sleeve is fixedly embedded in the inner wall of each sliding block, a forward and reverse screw rod is in threaded connection with the interior of each set of screw sleeve, and two first bearings are fixedly embedded in the inner wall of each adjusting seat; and the left end and the right end of each positive and negative screw rod are connected with inner rings of first bearings. According to the device, the two sliding blocks are arranged in the adjusting seat, the positive and negative screw rods are synchronously driven to rotate through the two first motors, the positive and negative screw rods and the screw sleeves in the sliding blocks act in a threaded mode, the two sets of sliding blocks drive the supporting legs to be opened and closed, then the height of the cross beam is adjusted, and different installation requirements can be met conveniently.

Description

Technical Field

[0001] This utility model relates to the field of gantry cranes, and in particular to a gantry crane with an adjustable function. Background Technology

[0002] Gantry cranes are a type of bridge crane. In ports, they are mainly used for loading and unloading cargo and bulk cargo in outdoor freight yards and material yards. Their metal structure resembles a portal frame, with two legs installed under the main beam, allowing them to travel directly on ground tracks. The main beam can have cantilever beams extending outwards at both ends. Gantry cranes are characterized by high site utilization, large operating range, wide adaptability, and strong versatility, and are widely used in port freight yards.

[0003] Gantry cranes have two outriggers that support both ends of a crossbeam. These outriggers can slide along rails on the ground, while the crossbeam spans across the rails and can support lifting equipment such as electric hoists or other lifting devices. However, most gantry cranes currently have fixed outriggers, which makes it inconvenient to adjust the height of the crossbeam according to installation requirements. This reduces the installation flexibility of gantry cranes during use. To address this issue, we propose a gantry crane with adjustable functions. Utility Model Content

[0004] The purpose of this utility model is to provide a gantry crane with adjustable function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A gantry crane with adjustable function includes two adjusting seats and a crossbeam. Each adjusting seat has two sliding blocks slidably connected inside. The upper surface of each sliding block is hinged to a support leg via a first hinge seat. The top of each support leg is hinged to the bottom surface of the crossbeam via a second hinge seat. Each sliding block has a threaded sleeve fixedly embedded in its inner wall. Each set of threaded sleeves has a threaded rod connected to both positive and negative threads. Each adjusting seat has two first bearings fixedly embedded in its inner wall. The left and right ends of each positive and negative threaded rod are connected to the inner rings of the first bearings. A first motor is installed on the right side of each adjusting seat, and the output end of the first motor is connected to one end of the positive and negative threaded rod. A lifting trolley is slidably connected to the outer surface of the crossbeam.

[0007] In a further embodiment, a lifting mechanism is installed on the bottom surface of the lifting trolley, and two sets of traveling wheels are rotatably connected to the inner wall of the lifting trolley through a second bearing. Each traveling wheel is in contact with the inner wall of the crossbeam, and a second motor is installed on the outer surface of the lifting trolley.

[0008] In a further embodiment, two lifting lugs are fixedly connected to the upper surface of the crossbeam, and two warning signs are fixedly connected to the upper surface of the crossbeam.

[0009] In a further embodiment, a fixing plate is fixedly connected to the bottom surface of each adjustment seat, and a fixing hole is provided on the upper surface of each fixing plate.

[0010] In a further embodiment, each of the adjustment seats has two sets of sliding grooves on its inner wall, and each sliding groove has a slider slidably connected inside it. The sides of the two sliders that are close to each other are connected to the sliding block.

[0011] In a further embodiment, both the first motor and the second motor are servo motors, and the crossbeam is an I-beam.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This device is supported by two sets of support legs connected in the adjusting seat and a crossbeam. A lifting trolley is set on the crossbeam. A second motor drives the traveling wheels to move the lifting trolley along the crossbeam, thereby moving the lifting mechanism at the bottom of the lifting trolley. Two sliding blocks are set in the adjusting seat. By controlling two first motors to drive the positive and negative lead screws to rotate synchronously, the positive and negative lead screws interact with the threaded sleeves in the sliding blocks. The two sets of sliding blocks drive the support legs to open and close, thereby adjusting the height of the crossbeam to adapt to different installation requirements. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a gantry crane with adjustable functions.

[0015] Figure 2 This is a side view of the crossbeam structure of a gantry crane with adjustable function.

[0016] Figure 3 This is a top sectional view of the adjusting seat in a gantry crane with adjustable function.

[0017] Figure 4 This is a three-dimensional structural diagram of the lifting trolley in a gantry crane with adjustable functions.

[0018] In the diagram: 1. Adjusting seat; 2. Crossbeam; 3. Warning sign; 4. Lifting lug; 5. Second hinge seat; 6. Support leg; 7. First hinge seat; 8. Fixing hole; 9. Second motor; 10. Lifting trolley; 11. Lifting mechanism; 12. First motor; 13. Sliding block; 14. Fixing plate; 15. Positive and negative lead screws; 16. Screw sleeve; 17. First bearing; 18. Sliding block; 19. Traveling wheel; 20. Slide groove. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] 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.

[0022] Please see Figure 1-4In this utility model, a gantry crane with an adjustable function includes two adjusting seats 1 and a crossbeam 2. Each adjusting seat 1 has two sliding blocks 13 slidably connected inside. The upper surface of each sliding block 13 is hinged to a support leg 6 via a first hinge seat 7. The top of each support leg 6 is hinged to the bottom surface of the crossbeam 2 via a second hinge seat 5. A threaded sleeve 16 is fixedly embedded in the inner wall of each sliding block 13. Each set of threaded sleeves 16 is threaded with a positive and negative threaded rod 15. Two first bearings 17 are fixedly embedded in the inner wall of each adjusting seat 1. Each positive and negative threaded rod 15... Both ends of 5 are connected to the inner ring of the first bearing 17. Each right side of the adjusting seat 1 is equipped with a first motor 12. The output end of the first motor 12 is connected to one end of the positive and negative lead screw 15. The controller controls the two first motors 12 to start synchronously. The first motor 12 drives the two positive and negative lead screws 15 in the adjusting seat 1 to act with the threaded sleeve 16 in the sliding block 13. This causes the two sets of sliding blocks 13 to drive the two sets of support legs 6 to open and close under the cooperation of the sliding groove 20 and the slider 18. The height of the crossbeam 2 is adjusted by the first hinge seat 7 and the second hinge seat 5 in cooperation with the support legs 6.

[0023] A trolley 10 is slidably connected to the outer surface of the crossbeam 2. A lifting mechanism 11 is installed on the bottom surface of the trolley 10. Two sets of traveling wheels 19 are rotatably connected to the inner wall of the trolley 10 through a second bearing. Each traveling wheel 19 is in contact with the inner wall of the crossbeam 2. A second motor 9 is installed on the outer surface of the trolley 10. As is the prior art, the lifting mechanism 11 uses a winch and wire rope for lifting. The detailed lifting principle will not be described here. The second motor 9 is controlled to drive the traveling wheels 19 inside the trolley 10 to rotate, so that the traveling wheels 19 slide along the crossbeam 2 with the trolley 10, which facilitates the adjustment of the lifting position of the lifting mechanism 11.

[0024] Two lifting lugs 4 are fixedly connected to the upper surface of the crossbeam 2, and two warning signs 3 are fixedly connected to the upper surface of the crossbeam 2. The lifting lugs 4 facilitate loading and unloading with the crane, and the warning signs 3 serve as safety warnings. Each adjusting seat 1 has a fixed plate 14 fixedly connected to its bottom surface. Each fixed plate 14 has a fixing hole 8 on its upper surface, which facilitates the installation of the crane. Each adjusting seat 1 has two sets of sliding grooves 20 on its inner wall. Each sliding groove 20 has a slider 18 slidably connected inside it. The sides of the two sliders 18 that are close to each other are connected to the sliding block 13. The sliding grooves 20 and sliders 18 can slide in conjunction with the sliding block 13, and also serve as limiters. The first motor 12 and the second motor 9 are both servo motors. The crossbeam 2 is an I-beam. With the help of the servo motors, the use of the crane can be controlled more easily.

[0025] The working principle of this utility model is as follows:

[0026] In use, the gantry crane is first installed in the operating position via the fixing plate 14. The power supply of the crane is then connected, and the two first motors 12 are started synchronously by the controller. The first motors 12 drive the two positive and negative lead screws 15 in the adjusting seat 1 to engage with the threaded sleeves 16 in the sliding block 13. This causes the two sets of sliding blocks 13 to open and close the two sets of support legs 6 under the cooperation of the sliding groove 20 and the slider 18. The height of the crossbeam 2 is adjusted by the first hinge seat 7 and the second hinge seat 5 in cooperation with the support legs 6. The second motor 9 is controlled to drive the traveling wheels 19 inside the lifting trolley 10 to rotate, so that the traveling wheels 19 cooperate with the lifting trolley 10 to slide along the crossbeam 2, which facilitates the adjustment of the lifting position of the lifting mechanism 11.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gantry crane with a regulating function, characterized in that: The utility model provides a kind of crane, including two adjusting seats (1) and crossbeam (2), the inside of each described adjusting seat (1) is slidably connected with two sliding blocks (13), the upper surface of each described sliding block (13) is movably hinged with support leg (6) by first hinged seat (7), the top of each described support leg (6) is hinged with the bottom surface of crossbeam (2) by second hinged seat (5), the inner wall of each described sliding block (13) is fixedly embedded with silk cover (16), the inside of each group described silk cover (16) is threadedly connected with positive and negative screw rod (15), the inner wall of each described adjusting seat (1) is fixedly embedded with two first bearings (17), the left and right ends of each described positive and negative screw rod (15) are connected with the inner ring of first bearing (17), the right side of each described adjusting seat (1) is mounted with first motor (12), the output of first motor (12) is connected with one end of positive and negative screw rod (15), the outer surface of crossbeam (2) is slidably connected with hoist trolley (10).

2. The gantry crane with a regulating function according to claim 1, characterized in that: The bottom of hoist trolley (10) is installed with hoisting mechanism (11), the inner wall of hoist trolley (10) is rotatably connected with two groups of travelling wheels (19) by second bearing, each described travelling wheel (19) is in contact with the inner wall of crossbeam (2), the outer surface of hoist trolley (10) is installed with second motor (9).

3. The gantry crane with a regulating function according to claim 1, characterized in that: The upper surface of crossbeam (2) is fixedly connected with two lugs (4), the upper surface of crossbeam (2) is fixedly connected with two warning signs (3).

4. The gantry crane with a regulating function according to claim 1, characterized in that: The bottom of each described adjusting seat (1) is fixedly connected with fixed plate (14), the upper surface of each described fixed plate (14) is provided with fixed hole (8).

5. The gantry crane with a regulating function according to claim 1, characterized in that: The inner wall of each described adjusting seat (1) is provided with two groups of sliding grooves (20), the inside of each described sliding groove (20) is slidably connected with sliding block (18), the side of two described sliding blocks (18) close to each other is connected with sliding block (13).

6. The gantry crane with a regulating function according to claim 1, characterized in that: First motor (12) and second motor (9) are all servo motor, and crossbeam (2) is I-beam.

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