Portal crane trolley

Abstract

This utility model relates to the field of crane technology, and in particular discloses a gantry crane lifting trolley, including a lower frame and an upper frame. Two trolley frames are mounted on the lower frame. A hinge mechanism is provided at the bottom of each trolley frame, and the hinge mechanism is connected to the lower frame via a linear guide rail. Symmetrically distributed fixed seats are provided on the lower frame, and a worm gear mechanism is mounted on each fixed seat. The two output ends of the worm gear mechanism are respectively connected to the trolley frames. A lifting mechanism is provided on each trolley frame. This utility model uses the worm gear mechanism to drive the trolley frames to move relative to the lower frame, adjusting the horizontal angle of the lifting mechanism of the two trolley frames relative to the load. Furthermore, by using different lifting speeds of the lifting drive motors of the two trolley frames, the vertical angle of the load is adjusted, thereby achieving omnidirectional adjustment of the load's lifting angle. This facilitates the placement of loads in different positions with high accuracy and strong practicality. The two trolley frames are relatively independent and can be adjusted separately, with a large adjustment range.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to a gantry crane hoisting trolley. Background Technology

[0002] Gantry cranes, as important technical equipment in industrial production, are widely used in freight yards, docks, workshops, and other workplaces. The hoisting trolley, as part of the crane, is a crucial lifting and horizontal movement mechanism, providing lifting power to complete the lifting of heavy objects. Research shows that in some special operating situations, cranes employ double-layer trolleys, such as CN206219059U, CN216105637U, CN218088618U, and CN212769459U. However, existing double-layer trolleys are primarily designed for weighing the lifted load. To ensure weighing accuracy, limit switches are often installed between the upper and lower trolleys to control displacement. This limits the current technology to only allow for lateral and longitudinal movement of the lifted load, preventing angle adjustment and precise placement in complex situations, thus limiting its practicality.

[0003] Therefore, it is necessary to propose an improvement to the hoisting trolley of a gantry crane to overcome the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the prior art and provide a gantry crane hoisting trolley.

[0005] The technical solution of this utility model is:

[0006] A gantry crane hoisting trolley includes a lower frame and an upper frame. The upper frame includes two small frames, which are spaced apart on the lower frame. The bottom of each small frame has a pair of symmetrically distributed hinge mechanisms, which are connected to the lower frame via linear guide rails. The lower frame has symmetrically distributed fixed seats, and each fixed seat has a worm gear mechanism. The two output ends of the worm gear mechanism are respectively connected to the small frames. A hoisting mechanism is provided on the small frames.

[0007] Preferably, the hinge mechanism includes a first hinge seat, a second hinge seat, and an intermediate seat. The first hinge seat is mounted on the trolley frame, and there are two second hinge seats mounted on a linear guide rail. The intermediate seat is hinged between the first hinge seat and the two second hinge seats.

[0008] Preferably, the worm gear mechanism includes a drive unit and a worm unit. The drive unit is mounted on a fixed seat, and the worm unit is disposed through the drive unit and is connected to the drive unit in a transmission manner. Both ends of the worm unit are connected to the trolley frame through flange seats.

[0009] Preferably, the lower frame includes end beams, connecting beams and crossbeams, with multiple connecting beams arranged parallel to each other between two end beams, and crossbeams arranged between two adjacent connecting beams.

[0010] Preferably, both ends of the end beam are equipped with traveling wheels, and a traveling speed reduction motor that is connected to the traveling wheels is installed on the side wall of one end of the end beam.

[0011] Preferably, the lifting mechanism includes a lifting gear motor and two lifting drums, which are symmetrically arranged at both ends of the trolley frame along its length, and the lifting gear motor is connected to the two lifting drums in a driving connection.

[0012] Preferably, the lower frame is equipped with guardrails.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention uses a worm gear mechanism to move the trolley frame relative to the lower frame, adjusting the horizontal angle of the lifting mechanism of the two trolley frames for lifting the load. By using different lifting speeds of the lifting drive motors of the two trolley frames, the vertical angle of the load is adjusted, thus achieving omnidirectional adjustment of the load's lifting angle. This facilitates the placement of the load in different positions with high accuracy and practicality. The two trolley frames are relatively independent and can be adjusted separately, with a large adjustment range. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0017] Figure 3 This is a top view of the structure of this utility model;

[0018] Figure 4 This utility model Figure 1 A magnified schematic diagram of the structure at point A;

[0019] Figure 5 This utility model Figure 3 A magnified schematic diagram of the structure at point B;

[0020] Figure 6 This is a schematic diagram of the lower frame structure of this utility model. Figure 1 ;

[0021] Figure 7 This is a schematic diagram of the lower frame structure of this utility model. Figure 2 .

[0022] The components are as follows: 1. Lower frame; 2. Upper frame; 3. Trolley frame; 4. Linear guide rail; 5. Fixed seat; 6. First hinge seat; 7. Second hinge seat; 8. Intermediate seat; 9. Drive unit; 10. Worm gear unit; 11. Flange seat; 12. End beam; 13. Connecting beam; 14. Crossbeam; 15. Traveling wheel; 16. Traveling geared motor; 17. Lifting geared motor; 18. Lifting drum; 19. Guardrail. Detailed Implementation

[0023] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0024] like Figures 1-7 As shown, a gantry crane hoisting trolley includes a lower frame 1 and an upper frame 2. The upper frame 2 is mounted on the lower frame 1 and is used for lifting heavy objects and adjusting the spatial angle. The lower frame 1 can change the position of the heavy object by moving.

[0025] like Figure 6 and Figure 7 As shown, the lower frame 1 includes end beams 12, connecting beams 13, and crossbeams 14. There are two end beams 12 arranged in parallel. There are multiple connecting beams 13 connected in parallel between the two end beams 12. The spacing between two adjacent connecting beams 13 is adjusted according to the working conditions. Crossbeams 14 are connected between two adjacent connecting beams 13. There are at least two crossbeams 14 between two adjacent connecting beams 13 to ensure the stability of the connection. The connecting beams 13 adopt an integral structure or a split structure. The integral structure of the connecting beam 13 has high structural strength and good stability. The split structure of the connecting beam 13 is convenient to process and transport. The split structure of the connecting beam 13 is connected by flange bolts, which is convenient for installation and disassembly.

[0026] like Figure 1 and Figure 3 As shown, a traveling wheel 15 is installed at both ends of the end beam 12. The traveling wheel 15 is connected to the end beam 12 by bearing seats and can rotate relative to the end beam 12. A traveling reduction motor 16 is installed on the inner side wall of one end of the end beam 12. The traveling reduction motor 16 is connected to the traveling wheel 15 at that end for transmission and is used to drive the traveling wheel 15 to realize the movement of the lower frame 1. The two end beams 12 realize the driving of movement at the same time, ensuring the consistency of movement and avoiding deviation.

[0027] like Figures 1-5As shown, the upper frame 2 includes two small frames 3, which are connected to the two ends of the lower frame 1 in the longitudinal direction. The small frames 3 are connected to the lower frame 1 through hinge mechanisms and linear guide rails 4. Specifically, four hinge structures are installed at the bottom of the small frames 3, and the four hinge mechanisms are symmetrically distributed in pairs. Linear guide rails 4 corresponding to the hinge mechanisms are installed on the lower frame 1. The small frames 3 are connected to the lower frame 1 through the linear guide rails 4, which can realize the movement of the small frames 3 relative to the lower frame 1 by a certain displacement, thereby adjusting the relative position between the two small frames 3 and the lifting angle of the heavy object to meet the lifting requirements.

[0028] The movement of the trolley frame 3 relative to the lower frame 1 is achieved through a worm gear mechanism. Two fixed seats 5 are installed on the lower frame 1, and the two fixed seats 5 are symmetrically distributed on the lower frame 1, corresponding to the two trolley frames 3 respectively. The fixed seats 5 are fixedly connected to the lower frame 1. The worm gear mechanism is installed on the fixed seats 5 and connected to the trolley frame 3. Specifically, the worm gear mechanism includes a drive part 9 and a worm part 10. The drive part 9 is installed on the fixed seats 5, and the worm part 10 is penetrated and connected to the drive part 9. The worm part 10 is connected to the drive part 9 in a transmission connection, driving the worm part 10 to achieve reciprocating movement relative to the drive part 9. Both ends of the worm part 10 are connected to flange seats 11, and the flange seats 11 at both ends are connected to the trolley frame 3 by bolts. The reciprocating movement of the worm part 10 drives the trolley frame 3 to move relative to the lower frame 1 along the linear guide rail 4.

[0029] The hinge mechanism includes a first hinge seat 6, a second hinge seat 7, and an intermediate seat 8. The first hinge seat 6 is connected to the trolley frame 3. There are two second hinge seats 7, both of which are connected to the slider of the linear guide rail 4. The intermediate seat 8 is connected between the first hinge seat 6 and the two second hinge seats 7. The first hinge seat 6 is hinged to the middle of the intermediate seat 8, and the two second hinge seats 7 are symmetrically hinged at both ends of the intermediate seat 8. By adopting a hinged connection, the flexibility of the trolley frame 3 and the lower frame 1 is improved, and the stress concentration between the trolley frame 3 and the lower frame 1 is reduced, thereby enhancing stability and safety. It also enables rapid assembly and disassembly between the trolley frame 3 and the lower frame 1, simplifies replacement and maintenance, saves labor costs, time costs, and production costs, and improves work efficiency.

[0030] like Figures 1-3 As shown, each trolley frame 3 is equipped with a lifting mechanism, which includes a lifting reduction motor 17 and a lifting drum 18. The lifting reduction motor 17 is installed on the relatively close side wall of the trolley frame 3. There are two lifting drums 18, which are symmetrically installed at both ends of the length of the trolley frame 3. The lifting reduction motor 17 is connected to the two lifting drums 18 for transmission. The lifting reduction motor 17 drives the two lifting drums 18 to rotate simultaneously. The wire rope is wound on the lifting drum 18, and the end of the wire rope is connected to a hook for lifting heavy objects.

[0031] like Figure 1 and Figure 2 As shown, a guardrail 19 is installed on the lower frame 1. The guardrail 19 is installed at both ends of the lower frame 1 in the direction of travel, and is used to limit the movement of the trolley frame 3 and to protect the safety of the operator when performing operation and maintenance.

[0032] The working principle of this utility model is as follows:

[0033] When lifting heavy objects, the lifting reduction motor 17 drives the lifting drum 18 to rotate and lower the wire rope. After the hook catches the heavy object, the lifting reduction motor 17 reverses, and the lifting drum 18 winds up the wire rope to lift the heavy object. During the lifting process or after the heavy object has been lifted to a sufficient height, the drive unit 9 is activated, which drives the worm gear unit 10 to move linearly, thereby pushing the trolley frame 3 to move relative to the lower trolley frame 1 along the linear guide rail 4. The worm gear mechanism connected to the two trolley frames 3 can be activated simultaneously to adjust the relative position of the two trolley frames 3. By using different lifting speeds of the lifting reduction motors 17 on the two trolley frames 3, the lifting angle of the heavy object can be adjusted in the horizontal and vertical directions. In conjunction with the travel reduction motor 16, the lower trolley frame 1 is moved, which facilitates the placement of heavy objects in different positions and achieves precise placement. It has strong practicality and is suitable for promotion.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.

Claims

1. A hoisting trolley for a gantry crane, characterized in that, The vehicle includes a lower frame (1) and an upper frame (2). The upper frame (2) includes two small frames (3). The two small frames (3) are spaced apart on the lower frame (1). The bottom of the small frames (3) is provided with two symmetrically distributed hinge mechanisms. The hinge mechanisms are connected to the lower frame (1) through linear guide rails (4). The lower frame (1) is provided with symmetrically distributed fixed seats (5). The fixed seats (5) are provided with worm gear mechanisms. The two output ends of the worm gear mechanisms are respectively connected to the small frames (3). The small frames (3) are provided with lifting mechanisms.

2. The gantry crane hoisting trolley according to claim 1, characterized in that: The hinge mechanism includes a first hinge seat (6), a second hinge seat (7), and an intermediate seat (8). The first hinge seat (6) is mounted on the trolley frame (3). There are two second hinge seats (7), which are mounted on the linear guide rail (4). The intermediate seat (8) is hinged between the first hinge seat (6) and the two second hinge seats (7).

3. The gantry crane hoisting trolley according to claim 1, characterized in that: The worm gear mechanism includes a drive unit (9) and a worm part (10). The drive unit (9) is mounted on a fixed seat (5). The worm part (10) is mounted through the drive unit (9) and is connected to the drive unit (9) in a transmission manner. Both ends of the worm part (10) are connected to the trolley frame (3) through flange seats (11).

4. The gantry crane hoisting trolley according to claim 3, characterized in that: The lower frame (1) includes end beams (12), connecting beams (13) and crossbeams (14). Multiple connecting beams (13) are arranged parallel to each other between two end beams (12), and the crossbeams (14) are arranged between two adjacent connecting beams (13).

5. The gantry crane hoisting trolley according to claim 4, characterized in that: Both ends of the end beam (12) are provided with walking wheels (15), and a walking speed reduction motor (16) that is connected to the walking wheels (15) is provided on one side wall of the end beam (12).

6. The gantry crane hoisting trolley according to claim 1, characterized in that: The lifting mechanism includes a lifting reduction motor (17) and two lifting drums (18). The two lifting drums (18) are symmetrically arranged at both ends of the trolley frame (3) along its length. The lifting reduction motor (17) is connected to the two lifting drums (18) in a transmission connection.

7. The gantry crane hoisting trolley according to claim 1, characterized in that: The lower frame (1) is equipped with a guardrail (19).

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