Bridge grab crane

Abstract

The utility model discloses a grab bridge crane, which relates to the technical field of article transportation and comprises a cross beam, an electric slide rail fixedly arranged at the bottom of the cross beam and an electric hoist connected with the electric slide rail, and a traction rope is arranged at the output end of the electric hoist. The other end of the traction rope is provided with a connecting mechanism and is in transmission connection with a connecting rod through the connecting mechanism, the rod wall of the connecting rod is rotationally sleeved with an external threaded pipe, the pipe wall of the external threaded pipe is in threaded sleeve connection with a connecting plate, and the lower end of the connecting rod is fixedly connected with a mounting plate; four first U-shaped blocks are fixedly arranged on the side wall of the mounting plate in a surrounding mode, and a first shaft pin is fixedly arranged in each first U-shaped block. Through the arrangement of the four driving mechanisms, the four grippers can be driven to work synchronously in the rotating process of the external threaded pipe, so that the four grippers can be controlled to be opened or closed synchronously, the manufacturing cost of the whole device is saved, and meanwhile, the later maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of article transportation, in particular to a grab bucket bridge crane. Background Art

[0002] As is known to all, a grab bridge crane is an auxiliary device for grabbing and transporting objects, and has been widely used in the field of goods transportation. In the process of realizing this application, the applicant found that the multiple grabbers of the existing bridge cranes are mostly driven by independent electric push rods, which leads to the problem that the manufacturing cost and subsequent maintenance cost of the entire device are high. Utility Model Content

[0003] In view of the above problems existing in the existing grab bucket bridge crane, the present utility model is proposed.

[0004] Therefore, the utility model aims to provide a grab bridge crane, which solves the problem of high manufacturing cost and subsequent maintenance cost of the entire device.

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

[0006] A grab bridge crane comprises a crossbeam, an electric slide rail fixedly arranged at the bottom of the crossbeam, and an electric hoist connected to the electric slide rail, wherein a traction rope is arranged at the output end of the electric hoist, a connecting mechanism is arranged at the other end of the traction rope and is connected to a connecting rod through the connecting mechanism, an external threaded pipe is rotatably sleeved on the rod wall of the connecting rod, a connecting plate is threadedly sleeved on the tube wall of the external threaded pipe, a mounting plate is fixedly connected to the lower end of the connecting rod, four first U-shaped blocks are fixedly arranged around the side wall of the mounting plate, a first axle pin is fixedly arranged inside each of the first U-shaped blocks, a gripper is rotatably sleeved on the rod wall of each of the first axle pins, four driving mechanisms are arranged around the bottom of the connecting plate, and each of the grippers is connected to the connecting plate through a corresponding driving mechanism.

[0007] Preferably, the connecting mechanism includes a first fixing plate and a second fixing plate, the first fixing plate is fixedly arranged at the end of the traction rope and has a plurality of through holes opened therein, a fixing rod is movably passed through the interior of each of the through holes, the second fixing plate is fixedly arranged at the upper end of the connecting rod and is fixedly connected to a plurality of fixing rods, a baffle is fixedly arranged at the upper end of each of the fixing rods, and a spring movably sleeved on the rod wall of the corresponding fixing rod is fixedly arranged between each of the baffles and the first fixing plate.

[0008] Preferably, the driving mechanism includes a driving rod and two second U-shaped blocks, and the rod walls at both ends of the driving rod are rotatably sleeved with second axle pins, each of the second axle pins is fixedly arranged inside the corresponding second U-shaped block, and the two second U-shaped blocks are respectively fixedly connected to the connecting plate and the corresponding gripper.

[0009] Preferably, the rod wall fixing sleeve of the connecting rod is provided with a support plate, a motor is fixedly installed on the top of the support plate, the output end of the motor passes through the support plate and is fixedly connected to a first gear, and the tube wall fixing sleeve of the externally threaded tube is provided with a second gear, and the first gear is meshingly connected with the second gear.

[0010] Preferably, a plurality of anti-sliding blocks are fixedly provided on the inner wall of each of the grippers.

[0011] Preferably, the motor is a stepper motor.

[0012] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0013] The utility model can drive the four grippers to work synchronously during the rotation of the external threaded pipe by means of the four driving mechanisms, so as to control the four grippers to open or close synchronously, thereby saving the manufacturing cost of the entire device and reducing the subsequent maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

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

[0016] Figure 2 For the utility model Figure 1 An enlarged schematic diagram of part B;

[0017] Figure 3 For the utility model Figure 1 A magnified schematic diagram of part A.

[0018] Description of reference numerals:

[0019] 1. Crossbeam; 2. Electric slide rail; 3. Electric hoist; 4. Connecting rod; 5. Externally threaded pipe; 6. Connecting plate; 7. Mounting plate; 8. First U-shaped block; 9. First axle pin; 10. Grip; 11. First fixed plate; 12. Second fixed plate; 13. Fixed rod; 14. Baffle; 15. Spring; 16. Driving rod; 17. Second U-shaped block; 18. Second axle pin; 19. Support plate; 20. Motor; 21. First gear; 22. Second gear; 23. Anti-sliding block; 24. Traction rope. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] The utility model embodiment discloses a grab bucket bridge crane.

[0022] The utility model provides Figure 1-3 A grab bridge crane shown in the figure comprises a crossbeam 1, an electric slide rail 2 fixedly arranged at the bottom of the crossbeam 1 and an electric hoist 3 connected to the electric slide rail 2, a traction rope 24 is arranged at the output end of the electric hoist 3, a connecting mechanism is arranged at the other end of the traction rope 24 and a connecting rod 4 is connected to the connecting rod 4 through the connecting mechanism, an external threaded tube 5 is rotatably sleeved on the rod wall of the connecting rod 4, a connecting plate 6 is threadedly sleeved on the tube wall of the external threaded tube 5, a mounting plate 7 is fixedly connected to the lower end of the connecting rod 4, four first U-shaped blocks 8 are fixedly arranged around the side wall of the mounting plate 7, a first axle pin 9 is fixedly arranged inside each of the first U-shaped blocks 8, a gripper 10 is rotatably sleeved on the rod wall of each first axle pin 9, four driving mechanisms are arranged around the bottom of the connecting plate 6, each gripper 10 is connected to the connecting plate 6 through a corresponding driving mechanism, and the four driving mechanisms can be used to drive the four grippers 10 to work synchronously during the rotation of the external threaded tube 5, so that the four grippers 10 can be controlled to open or close synchronously, thereby saving the manufacturing cost of the entire device and reducing the subsequent maintenance cost.

[0023] like Figure 1As shown, the connecting mechanism includes a first fixed plate 11 and a second fixed plate 12, the first fixed plate 11 is fixedly arranged at the end of the traction rope 24 and has a plurality of through holes inside, a fixed rod 13 is movably penetrated inside each through hole, the second fixed plate 12 is fixedly arranged at the upper end of the connecting rod 4 and is fixedly connected to the plurality of fixed rods 13, a baffle 14 is fixedly arranged at the upper end of each fixed rod 13, a spring 15 movably sleeved with the rod wall of the corresponding fixed rod 13 is fixedly arranged between each baffle 14 and the first fixed plate 11, by utilizing the plurality of fixed rods 13 and the corresponding springs 15, the corresponding block can be squeezed by the elastic force of the spring 15 during the process of loosening the gripper 10, thereby driving the four grippers 10 to automatically move upward without the need to wind the traction rope 24 through the electric hoist 3.

[0024] like Figure 1-2 As shown, the driving mechanism includes a driving rod 16 and two second U-shaped blocks 17. The rod walls at both ends of the driving rod 16 are rotatably sleeved with second axle pins 18. Each second axle pin 18 is fixedly arranged inside the corresponding second U-shaped block 17. The two second U-shaped blocks 17 are respectively fixedly connected to the connecting plate 6 and the corresponding grippers 10. By utilizing the set driving mechanism, the four grippers 10 can be opened when the connecting plate 6 moves upward, and the grippers 10 can be closed when the connecting plate 6 moves downward.

[0025] like Figure 1 and Figure 3 As shown, the rod wall fixed sleeve of the connecting rod 4 is provided with a support plate 19, the top of the support plate 19 is fixedly provided with a motor 20, the output end of the motor 20 passes through the support plate 19 and is fixedly connected with a first gear 21, and the tube wall fixed sleeve of the externally threaded tube 5 is provided with a second gear 22, the first gear 21 is meshingly connected with the second gear 22, and the meshing connection between the first gear 21 and the second gear 22 can be used to drive the externally threaded tube 5 to rotate during the operation of the motor 20, thereby driving the connecting plate 6 to move, thereby realizing the driving of the four driving mechanisms.

[0026] like Figure 1 As shown, a plurality of anti-sliding blocks 23 are fixedly disposed on the inner wall of each gripper 10 . The plurality of anti-sliding blocks 23 can increase the friction force on the surface of the gripper 10 .

[0027] like Figure 1 As shown, the motor 20 is a stepping motor. The stepping motor can drive the first gear 21 to rotate forward and reverse, thereby driving the connecting plate 6 to move up and down.

[0028] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A grab bridge crane, comprising a crossbeam (1), an electric slide rail (2) fixedly arranged at the bottom of the crossbeam (1), and an electric hoist (3) connected to the electric slide rail (2), characterized in that: The output end of the electric hoist (3) is provided with a traction rope (24), the other end of the traction rope (24) is provided with a connecting mechanism and is connected to a connecting rod (4) through the connecting mechanism, the rod wall of the connecting rod (4) is rotatably sleeved with an external threaded tube (5), the tube wall of the external threaded tube (5) is threadedly sleeved with a connecting plate (6), the lower end of the connecting rod (4) is fixedly connected with a mounting plate (7), the side wall of the mounting plate (7) is surrounded and fixedly provided with four first U-shaped blocks (8), each of the first U-shaped blocks (8) is fixedly provided with a first axle pin (9) inside, the rod wall of each first axle pin (9) is rotatably sleeved with a gripper (10), the bottom of the connecting plate (6) is surrounded by four driving mechanisms, and each of the grippers (10) is connected to the connecting plate (6) through a corresponding driving mechanism.

2. A grab bridge crane according to claim 1, characterized in that: The connecting mechanism comprises a first fixing plate (11) and a second fixing plate (12); the first fixing plate (11) is fixedly arranged at the end of the traction rope (24) and has a plurality of through holes therein; a fixing rod (13) is movably inserted into each of the through holes; the second fixing plate (12) is fixedly arranged at the upper end of the connecting rod (4) and is fixedly connected to the plurality of fixing rods (13); a baffle (14) is fixedly arranged at the upper end of each fixing rod (13); and a spring (15) movably sleeved on the rod wall of the corresponding fixing rod (13) is fixedly arranged between each baffle (14) and the first fixing plate (11).

3. The grab bridge crane according to claim 1, characterized in that: The driving mechanism comprises a driving rod (16) and two second U-shaped blocks (17); the rod walls at both ends of the driving rod (16) are rotatably sleeved with second axle pins (18); each second axle pin (18) is fixedly arranged inside a corresponding second U-shaped block (17); and the two second U-shaped blocks (17) are respectively fixedly connected to a connecting plate (6) and a corresponding gripper (10).

4. The grab bridge crane according to claim 1, characterized in that: The rod wall fixing sleeve of the connecting rod (4) is provided with a support plate (19), the top of the support plate (19) is fixedly provided with a motor (20), the output end of the motor (20) passes through the support plate (19) and is fixedly connected with a first gear (21), the tube wall fixing sleeve of the externally threaded tube (5) is provided with a second gear (22), and the first gear (21) is meshingly connected with the second gear (22).

5. The grab bridge crane according to claim 1, characterized in that: A plurality of anti-sliding blocks (23) are fixedly arranged on the inner wall of each gripper (10).

6. The grab bridge crane according to claim 4, characterized in that: The motor (20) is a stepping motor.

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