Portal crane with double hoists

Abstract

The utility model relates to the technical field of portal cranes, and discloses a portal crane with double hoists, which comprises a mounting frame, two mounting arms are symmetrically arranged at the left end and the right end of the top surface of the mounting frame, chain wheels are rotatably connected onto the two mounting arms, a rotating shaft of one chain wheel penetrates through the mounting arm and then is coaxially connected with a motor I, and a motor II is coaxially connected onto the rotating shaft of the other chain wheel. A chain is jointly installed on the two chain wheels, two sliding grooves are symmetrically formed in the positions, on the two sides of the chain, of the installation frame, movable lifting assemblies are installed in the two sliding grooves in a sliding mode, supporting columns are fixedly welded to the left side and the right side of the installation frame, and supporting feet are fixedly welded to the bottom ends of the supporting columns. The low-cost motor is combined with a mechanical structure, an electric push rod of an original device is replaced, the flexibility and stability of the device are improved, meanwhile, the production cost can be reduced, and cost reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry cranes, in particular to a gantry crane with double hoisting. Background Art

[0002] Gantry crane is a kind of deformation of bridge crane, also called gantry crane. It is mainly used for loading and unloading of outdoor cargo yard, material yard cargo and bulk cargo. 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] An existing gantry crane with double lifting (Announcement No.: CN220886778U) has at least the following disadvantages: the device starts a limit electric push rod to drive the two electric hoists on the walking track to change their positions so as to be suitable for lifting goods of corresponding sizes, and drives the lifting electric push rod on the top of the driving component to drive the lifting plate to rise, so that the height of the cargo lifting can be changed; the device changes the horizontal distance through a horizontal electric push rod, and lifts the cargo and the upper part of the mounting frame through four electric push rods. Since the stroke of the electric push rod is related to its own length, using the electric push rod in this way is not only too costly but also difficult to achieve the desired effect. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a gantry crane with double lifting.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gantry crane with double lifting comprises a mounting frame, two mounting arms are symmetrically provided at the left and right ends of the top surface of the mounting frame, sprockets are rotatably connected to the two mounting arms, a rotating shaft of one of the sprockets passes through the mounting arm and is coaxially connected to a motor, a chain is commonly installed on the two sprockets, two slide grooves are symmetrically opened on both sides of the chain on the mounting frame, mobile lifting components are slidably installed in the two slide grooves, support columns are welded and fixed on the left and right sides of the mounting frame, and support feet are welded and fixed to the bottom ends of the support columns.

[0007] As a further solution of the utility model, the movable lifting assembly includes a movable slider, and the movable slider is slidably connected in the slide groove.

[0008] As a further solution of the utility model, the side wall of the movable slider is integrally formed with a rack, and the two movable sliders are symmetrically installed on the mounting frame. The racks of the two movable sliders are meshed and transmission connected with the chain, and the chain drives the two movable sliders to move synchronously in the two slide grooves.

[0009] As a further solution of the utility model, the bottom surface of the movable slider is integrally formed with a fixed arm through the mounting frame, and a rotating roller is rotatably connected between the fixed arms.

[0010] As a further solution of the utility model, the central axis of the rotating roller passes through the fixed arm and is coaxially connected to the driven gear. The bottom surface of the mounting frame is integrally formed with a group of suspension arms between the two slide grooves, and the driving gear is rotatably connected inside the group of suspension arms.

[0011] As a further solution of the utility model, the rotating shaft of the driving gear passes through the suspension arm and is coaxially connected to the motor 2. The driving gear is meshed and transmission-connected with the two driven gears, and the driving gear drives the two driven gears to rotate synchronously.

[0012] As a further solution of the utility model, a steel cable is wound around the outer wall of the rotating roller, and a hook is fixedly connected to the end of the steel cable, and the hook is used to hang the goods.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The device drives the sprocket to rotate through motor 1, and the sprocket controls the two mobile lifting components to move toward or away from each other in two slide grooves through the chain, thereby adjusting the distance between the hooks on the two steel cables; the driving gear is driven to rotate by motor 2, and the driving gear drives the two driven gears meshing with it to rotate synchronously, and the two driven gears respectively drive two rotating rollers to rotate and wrap around the recovery steel cable, thereby lifting the goods; the device replaces the electric push rod of the original device through a combination of a low-cost motor and a mechanical structure, while improving the flexibility and stability of the lifting device, it can reduce production costs and achieve cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a gantry crane with double lifting proposed by the utility model;

[0016] Figure 2 This is a front view of the overall structure of a gantry crane with double lifting proposed by the utility model;

[0017] Figure 3 This is a side view of the overall structure of a gantry crane with double lifting proposed by the utility model;

[0018] Figure 4 This is a diagram of the overall structure and working state of a gantry crane with double lifting proposed by the utility model;

[0019] Figure 5 This is an exploded view of the overall structure of a gantry crane with double lifting proposed by the utility model;

[0020] Figure 6This is an exploded diagram of the structure of a mobile lifting component of a gantry crane with double lifting proposed by the utility model;

[0021] Figure 7 This is a structural parts diagram of a mounting frame of a gantry crane with double lifting proposed by the utility model.

[0022] In the figure: 1. mounting frame; 11. mounting arm; 12. slide; 13. suspension arm; 14. support column; 15. support foot; 2. sprocket; 21. motor one; 3. chain; 4. mobile lifting assembly; 41. mobile slider; 411. rack; 412. fixed arm; 42. rotating roller; 43. driven gear; 44. steel cable; 45. hook; 5. driving gear; 51. motor two. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Reference Figure 1-Figure 7A gantry crane with double lifting comprises a mounting frame 1, two mounting arms 11 are symmetrically provided at the left and right ends of the top surface of the mounting frame 1, sprockets 2 are rotatably connected to the two mounting arms 11, a rotating shaft of one sprocket 2 passes through the mounting arm 11 and is coaxially connected to a motor 21, a chain 3 is commonly installed on the two sprockets 2, two slide grooves 12 are symmetrically opened on both sides of the chain 3 of the mounting frame 1, and a mobile lifting component 4 is slidably installed in the two slide grooves 12, support columns 14 are welded and fixed on the left and right sides of the mounting frame 1, and support feet 15 are welded and fixed to the bottom ends of the support columns 14.

[0027] In this embodiment, the movable lifting assembly 4 includes a movable slider 41 , and the movable slider 41 is slidably connected in the slide groove 12 .

[0028] In this embodiment, a rack 411 is integrally formed on the side wall of the movable slider 41, and the two movable sliders 41 are symmetrically installed on the mounting frame 1. The racks 411 of the two movable sliders 41 are meshed and transmission connected with the chain 3, and the chain 3 drives the two movable sliders 41 to move synchronously in the two slide grooves 12.

[0029] In this embodiment, the bottom surface of the movable slider 41 is integrally formed with a fixed arm 412 through the mounting frame 1 , and a rotating roller 42 is rotatably connected between the fixed arms 412 .

[0030] In this embodiment, the central axis of the rotating roller 42 passes through the fixed arm 412 and is coaxially connected to the driven gear 43. A group of suspension arms 13 are integrally formed between the two slide grooves 12 on the bottom surface of the mounting frame 1. A driving gear 5 is rotatably connected inside the group of suspension arms 13, and the driving gear 5 drives the two driven gears 43 to rotate synchronously.

[0031] In this embodiment, the rotating shaft of the driving gear 5 passes through the suspension arm 13 and is coaxially connected to the second motor 51 . The driving gear 5 is meshed and transmission-connected with the two driven gears 43 .

[0032] In this embodiment, a steel cable 44 is wound around the outer wall of the rotating roller 42, and a hook 45 is fixedly connected to the end of the steel cable 44, and the hook 45 is used to hang goods.

[0033] From the above description, it can be seen that the above embodiment of the utility model achieves the following technical effects: the motor 21 is started to rotate forward or reversely, the motor 21 drives the sprocket 2 to rotate clockwise or counterclockwise, and the sprocket 2 controls the two mobile lifting components 4 to move toward or away from each other in the two slide grooves 12 through the chain 3 until the hooks 45 on the two steel cables 44 are adjusted to a suitable distance, and the staff installs the two hooks 45 together on both sides of the cargo;

[0034] Start motor 2 51, which drives the driving gear 5 meshing with it to rotate. The driving gear 5 drives the two driven gears 43 to rotate synchronously to form a reduction gear set. The two driven gears 43 respectively drive the two rotating rollers 42 to rotate at the same time. The rotating rollers 42 rotate and wrap around the recovery steel cables 44. The two steel cables 44 lift the goods together, reducing the number of motors on the gantry crane, thereby improving stability and reducing costs. At this point, the device is completed.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A gantry crane with double lifting, comprising a mounting frame (1), characterized in that: Two mounting arms (11) are symmetrically arranged at the left and right ends of the top surface of the mounting frame (1), and sprockets (2) are rotatably connected to the two mounting arms (11), and a rotating shaft of one of the sprockets (2) passes through the mounting arm (11) and is coaxially connected to a motor (21), and a chain (3) is commonly installed on the two sprockets (2), and the mounting frame (1) is symmetrically provided with two slide grooves (12) on both sides of the chain (3), and a movable lifting assembly (4) is slidably installed in the two slide grooves (12), and support columns (14) are welded and fixed on the left and right sides of the mounting frame (1), and a support foot (15) is welded and fixed at the bottom end of the support column (14).

2. A gantry crane with double lifting according to claim 1, characterized in that: The movable lifting assembly (4) comprises a movable sliding block (41), and the movable sliding block (41) is slidably connected in the sliding groove (12).

3. A gantry crane with double lifting according to claim 2, characterized in that: The side wall of the movable slider (41) is integrally formed with a rack (411), and the two movable sliders (41) are symmetrically mounted on the mounting frame (1), and the racks (411) of the two movable sliders (41) are both meshed and transmission-connected with the chain (3).

4. A gantry crane with double lifting according to claim 3, characterized in that: The bottom surface of the movable slider (41) passes through the mounting frame (1) and is integrally formed with a fixed arm (412), and a rotating roller (42) is rotatably connected between the fixed arms (412).

5. A gantry crane with double lifting according to claim 4, characterized in that: The central axis of the rotating roller (42) passes through the fixed arm (412) and is coaxially connected to a driven gear (43); a group of suspension arms (13) are integrally formed between the two slide grooves (12) on the bottom surface of the mounting frame (1); a driving gear (5) is rotatably connected inside the group of suspension arms (13).

6. A gantry crane with double lifting according to claim 5, characterized in that: The rotating shaft of the driving gear (5) passes through the suspension arm (13) and is coaxially connected to the second motor (51). The driving gear (5) is meshed and transmission-connected with the two driven gears (43).

7. A gantry crane with double lifting according to claim 5, characterized in that: A steel cable (44) is wound around the outer wall of the rotating roller (42), and a hook (45) is fixedly connected to the end of the steel cable (44).

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