Single-beam bridge crane

Abstract

The utility model provides a single-beam bridge crane which comprises a main beam and two fixing plates, guide sliding grooves are formed in the fixing plates, two pulleys are slidably connected into each guide sliding groove, the pulleys are fixedly connected with the main beam, assembling plates are fixedly connected to the surfaces of one sides of the fixing plates, and a U-shaped frame is fixedly connected to the tops of the two assembling plates jointly. A servo motor is installed on the top of the U-shaped frame, a first synchronous wheel is fixedly connected to the output shaft end of the servo motor, a second synchronous wheel is rotationally connected to the lower surface of the U-shaped frame, and a synchronous belt is connected between the first synchronous wheel and the second synchronous wheel in an engaged mode. A first connecting shaft and a second connecting shaft are fixedly connected to the center of the bottom of the first synchronizing wheel and the center of the bottom of the second synchronizing wheel respectively; when the servo motor operates, the position of the main beam can be automatically adjusted, labor-consuming manual operation is not needed, objects can be conveniently hoisted, time and labor are saved, meanwhile, the working efficiency is improved, the practicability is higher, and the application range is wider.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and more specifically, to a single-girder bridge crane. Background Technology

[0002] Single-girder bridge cranes are lifting equipment that spans across workshops, warehouses, and material yards for material handling. Because their two ends rest on metal supports, resembling a bridge, they are called single-girder bridge cranes. However, existing technology has the following shortcomings in its use:

[0003] In some single-girder bridge cranes, the position of the main beam is adjusted manually by pushing it. This method is time-consuming and labor-intensive, affecting actual work efficiency. In addition, if the metal support is high, adjusting the main beam may require climbing to a height, which is not conducive to practical use and has low practicality.

[0004] Therefore, there is an urgent need for a single-girder bridge crane to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the problem that some single-girder bridge cranes currently use manual adjustment of the main beam position during operation. This method is time-consuming and labor-intensive, affecting actual work efficiency. In addition, if the metal support is high, adjusting the main beam may require climbing to a height, which is not conducive to practical use and has low practicality.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A single-girder bridge crane is proposed to improve the above-mentioned problems.

[0008] The application is as follows:

[0009] A single-girder bridge crane includes a main girder and two fixed plates. Guide grooves are provided on the fixed plates, and two pulleys are slidably connected within each guide groove. The pulleys are fixedly connected to the main girder. An assembly plate is fixedly connected to one side surface of the fixed plates. A U-shaped frame is fixedly connected to the top of both assembly plates. A servo motor is mounted on the top of the U-shaped frame, and a first synchronous pulley is fixedly connected to the output shaft of the servo motor. A second synchronous pulley is rotatably connected to the lower surface of the U-shaped frame. A synchronous belt meshes between the first and second synchronous pulleys. A first connecting shaft and a second connecting shaft are fixedly connected to the bottom center of the first and second synchronous pulleys, respectively. A first sector gear and a second sector gear are fixedly sleeved on the first and second connecting shafts, respectively. A connecting plate is fixedly connected to the top of the main girder, and a rack plate meshing with the first sector gear is fixedly connected to the top of the connecting plate. A hoisting mechanism is installed at the bottom of the main girder.

[0010] As a preferred technical solution of this application, the hoisting mechanism includes an electric hoist installed at the bottom of the main beam, the electric hoist is provided with a hoisting steel cable, and a hook is fixedly connected to the bottom end of the hoisting steel cable.

[0011] As a preferred technical solution of this application, a first mounting plate and a second mounting plate are fixedly connected on the U-shaped frame. The end of the first connecting shaft away from the first synchronous wheel is rotatably connected to the first mounting plate through a first bearing, and the end of the second connecting shaft away from the second synchronous wheel is rotatably connected to the second mounting plate through a second bearing.

[0012] As a preferred technical solution of this application, the assembly plate is provided with a plurality of mounting holes.

[0013] As a preferred technical solution of this application, the first synchronous pulley and the second synchronous pulley have the same specifications, the first sector gear and the second sector gear have the same specifications, and the first sector gear and the second sector gear are parallel.

[0014] As a preferred technical solution of this application, the two fixing plates are symmetrically distributed about the central axis of the main beam.

[0015] As a preferred technical solution of this application, the pulley is in contact with the bottom wall of the guide groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In the scheme of this application:

[0018] The servo motor is started, and through the cooperation of the first synchronous pulley, the second synchronous pulley, the synchronous belt, the first connecting shaft, the second connecting shaft, the first sector gear, the second sector gear, the connecting plate, and the rack plate, the main beam can move linearly back and forth, thereby adjusting the position of the main beam. This eliminates the need for laborious operation by staff, saving time and effort while improving work efficiency, making it more practical and expanding its applicability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a single-girder bridge crane provided in this application.

[0020] Figure 2 This is a cross-sectional structural diagram of the fixed plate in a single-girder bridge crane provided in this application.

[0021] Figure 3 This is a top sectional view of a single-girder bridge crane provided in this application.

[0022] Figure 4 This is a front view structural schematic diagram of a single-girder bridge crane provided in this application.

[0023] The image shows:

[0024] 1. Main beam; 2. Fixing plate; 3. Guide groove; 4. Pulley; 5. Assembly plate; 6. U-shaped frame; 7. Servo motor; 8. First synchronous pulley; 9. Second synchronous pulley; 10. Synchronous belt; 11. First connecting shaft; 12. Second connecting shaft; 13. First sector gear; 14. Second sector gear; 15. Connecting plate; 16. Rack plate; 17. Electric hoist; 18. Lifting cable; 19. Hook; 20. First mounting plate; 21. Second mounting plate; 22. Mounting hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0026] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms 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 on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Example:

[0031] like Figure 1-4As shown, this embodiment of a single-girder bridge crane includes a main beam 1 and two fixed plates 2. Guide grooves 3 are provided on the fixed plates 2, and two pulleys 4 are slidably connected in each of the two guide grooves 3. The pulleys 4 are fixedly connected to the main beam 1. An assembly plate 5 is fixedly connected to one side surface of the fixed plates 2. A U-shaped frame 6 is fixedly connected to the top of both assembly plates 5. A servo motor 7 is mounted on the top of the U-shaped frame 6. A first synchronous pulley 8 is fixedly connected to the output shaft of the servo motor 7. When the servo motor 7 is started, it drives the first synchronous pulley 8 to rotate through its output shaft. A second synchronous pulley 9 is rotatably connected to the lower surface of the U-shaped frame 6. A synchronous belt 10 meshes between the first synchronous pulley 8 and the second synchronous pulley 9. Through the transmission of the synchronous belt 10, the second synchronous pulley 9 rotates synchronously with the first synchronous pulley 8. A first connecting shaft 11 and a second connecting shaft 11 are fixedly connected to the bottom center of the first synchronous pulley 8 and the bottom center of the second synchronous pulley 9, respectively. A first sector gear 13 and a second sector gear 14 are fixedly mounted on the first connecting shaft 11 and the second connecting shaft 12, respectively. The first connecting shaft 11 and the first sector gear 13 rotate synchronously with the first synchronous wheel 8, and the second connecting shaft 12 and the second sector gear 14 rotate synchronously with the second synchronous wheel 9. A connecting plate 15 is fixedly connected to the top of the main beam 1, and a rack plate 16 that meshes with the first sector gear 13 is fixedly connected to the top of the connecting plate 15. A hoisting mechanism is installed at the bottom of the main beam 1. When the first sector gear 13 rotates, it drives the rack plate 16 to move forward. Through the connecting plate 15, the main beam 1 moves synchronously with the rack plate 16. The pulley 4 moves in the guide groove 3. When the first sector gear 13 disengages from the rack plate 16, the rotating second sector gear 14 meshes with the rack plate 16. As the second sector gear 14 rotates, it drives the rack plate 16 to move backward.

[0032] like Figure 1 and Figure 2 As shown, the hoisting mechanism includes an electric hoist 17 installed at the bottom of the main beam 1. The electric hoist 17 is equipped with a hoisting steel cable 18, and a hook 19 is fixedly connected to the bottom end of the hoisting steel cable 18. When the electric hoist 17 is started, the hook 19 is lowered through the hoisting steel cable 18, and the item is placed on the hook 19 through the hanging ring, which facilitates the subsequent hoisting of the item.

[0033] like Figure 1 , Figure 3 and Figure 4As shown, a first mounting plate 20 and a second mounting plate 21 are fixedly connected to the U-shaped frame 6. The end of the first connecting shaft 11 away from the first synchronous pulley 8 is rotatably connected to the first mounting plate 20 through the first bearing. The end of the second connecting shaft 12 away from the second synchronous pulley 9 is rotatably connected to the second mounting plate 21 through the second bearing. The first bearing and the second bearing ensure the stability of the first connecting shaft 11, the first sector gear 13, the second connecting shaft 12 and the second sector gear 14 when they rotate.

[0034] like Figure 2 As shown, the assembly plate 5 has several mounting holes 22. By using multiple screws to engage with the multiple mounting holes 22, the two assembly plates 5 are respectively mounted on two metal brackets.

[0035] like Figure 1 and Figure 3 As shown, the first synchronous pulley 8 and the second synchronous pulley 9 have the same specifications, and the first sector gear 13 and the second sector gear 14 have the same specifications. The first sector gear 13 and the second sector gear 14 are parallel. When the first synchronous pulley 8 rotates, the second synchronous pulley 9 rotates synchronously with the first synchronous pulley 8 through the transmission of the synchronous belt 10. The rotation speed and rotation direction of the second synchronous pulley 9 and the first synchronous pulley 8 are the same, thereby ensuring the synchronicity of the rotation of the first sector gear 13 and the second sector gear 14.

[0036] like Figure 1 and Figure 3 As shown, the two fixed plates 2 are symmetrically distributed about the central axis of the main beam 1.

[0037] like Figure 2 As shown, the pulley 4 is in contact with the bottom wall of the guide groove 3. The four pulleys 4 cooperate with the two guide grooves 3 to guide the main beam 1 when it moves, so as to prevent the main beam 1 from deviating.

[0038] Specifically, when using this single-girder bridge crane: Multiple screws are used in conjunction with multiple mounting holes 22 to install two mounting plates 5 onto two metal brackets respectively. The servo motor 7 and electric hoist 17 are electrically connected to an external control power supply. The electric hoist 17 is started, and the hook 19 is lowered via the hoisting cable 18. The item is placed on the hook 19 through the hanging ring. Then, the servo motor 7 is started. The servo motor 7 drives the first synchronous pulley 8 to rotate via its output shaft. Through the transmission of the synchronous belt 10, the second synchronous pulley 9 rotates synchronously with the first synchronous pulley 8. The first connecting shaft 11 and the first sector gear 13 rotate synchronously with the first synchronous pulley 8, and the second connecting shaft 12 and the second sector gear 14 rotate synchronously with the second synchronous pulley 9. When the first sector gear 13 rotates… The rack plate 16 is moved forward, and the main beam 1 moves synchronously with the rack plate 16 through the connecting plate 15. The pulley 4 moves in the guide groove 3. When the first sector gear 13 disengages from the rack plate 16, the rotating second sector gear 14 engages with the rack plate 16. As the second sector gear 14 rotates, it drives the rack plate 16 to move backward. When the second sector gear 14 disengages from the rack plate 16, the first sector gear 13 engages with the rack plate 16 again. Thus, when the servo motor 7 is running, the main beam 1 can move back and forth, and the position of the main beam 1 can be adjusted to realize the hoisting of items. This saves time and effort while improving work efficiency. It does not require strenuous operation by the staff, is easy to use, and has higher practicality.

[0039] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A single-girder bridge crane, comprising a main girder (1) and two fixed plates (2), characterized in that, The fixed plate (2) is provided with guide grooves (3), and two pulleys (4) are slidably connected in each of the two guide grooves (3). The pulleys (4) are fixedly connected to the main beam (1). An assembly plate (5) is fixedly connected to one side surface of the fixed plate (2). A U-shaped frame (6) is fixedly connected to the top of the two assembly plates (5). A servo motor (7) is installed on the top of the U-shaped frame (6). A first synchronous wheel (8) is fixedly connected to the output shaft end of the servo motor (7). A second synchronous wheel (9) is rotatably connected to the lower surface of the U-shaped frame (6). The first synchronous wheel (8) and the second synchronous wheel (9) are rotatably connected. A synchronous belt (10) meshes between the wheels (9). A first connecting shaft (11) and a second connecting shaft (12) are fixedly connected at the bottom center of the first synchronous wheel (8) and the bottom center of the second synchronous wheel (9), respectively. A first sector gear (13) and a second sector gear (14) are fixedly sleeved on the first connecting shaft (11) and the second connecting shaft (12), respectively. A connecting plate (15) is fixedly connected to the top of the main beam (1). A rack plate (16) that meshes with the first sector gear (13) is fixedly connected to the top of the connecting plate (15). A hoisting mechanism is installed at the bottom of the main beam (1).

2. A single-girder bridge crane according to claim 1, characterized in that, The hoisting mechanism includes an electric hoist (17) installed at the bottom of the main beam (1), and a hoisting steel cable (18) is provided on the electric hoist (17). A hook (19) is fixedly connected to the bottom end of the hoisting steel cable (18).

3. A single-girder bridge crane according to claim 1, characterized in that, The U-shaped frame (6) is fixedly connected to a first mounting plate (20) and a second mounting plate (21). The end of the first connecting shaft (11) away from the first synchronous wheel (8) is rotatably connected to the first mounting plate (20) through a first bearing. The end of the second connecting shaft (12) away from the second synchronous wheel (9) is rotatably connected to the second mounting plate (21) through a second bearing.

4. A single-girder bridge crane according to claim 1, characterized in that, The assembly plate (5) has several mounting holes (22).

5. A single-girder bridge crane according to claim 1, characterized in that, The first synchronous pulley (8) and the second synchronous pulley (9) have the same specifications, the first sector gear (13) and the second sector gear (14) have the same specifications, and the first sector gear (13) and the second sector gear (14) are parallel.

6. A single-girder bridge crane according to claim 1, characterized in that, The two fixed plates (2) are symmetrically distributed about the central axis of the main beam (1).

7. A single-girder bridge crane according to claim 1, characterized in that, The pulley (4) is in contact with the bottom wall of the guide groove (3).

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