A radial movable slewing bearing hoist and a crane comprising the same

Abstract

The utility model provides a kind of radial movement slewing bearing lifting appliance and crane comprising the lifting appliance of the utility model. The lifting appliance contains boom device, pull rod oil cylinder, B type flat key and motor rotating arm device. Boom device bottom is equipped with oil cylinder support and V type upper slide plate, motor rotating arm device is with V type lower slide plate, and the two are sliding fit;Pull rod oil cylinder connects boom and motor rotating arm, and hydraulic motor drives rotating shaft. It can realize slewing bearing transverse / longitudinal clamping, overturning and radial movement, avoid lifting appliance and machining center crossbeam interference, without additional auxiliary equipment. It can improve work efficiency, reduce manual strength, ensure safety, simple structure is easy to operate, applicable to slewing bearing hoisting, assembly and other scenes, and has wide application prospect.

Description

Technical Field

[0001] This utility model relates to a radially movable slewing bearing lifting device and a crane including the lifting device. The lifting device can be applied to fields such as ship and port machinery installation that require slewing bearing lifting and assembly. Background Technology

[0002] Slewing bearings, as large bearings capable of withstanding comprehensive loads, can simultaneously withstand large axial and radial loads and overturning moments. They are widely used in many industries such as marine equipment, construction machinery, light industrial machinery, metallurgical machinery, medical machinery, and industrial machinery, and are often referred to as "the joints of machines." During the production, installation, and maintenance of slewing bearings, hoisting, turning, and assembly operations are frequently required.

[0003] Currently, existing lifting tools on the market have many limitations when handling slewing bearing-related operations. Some traditional lifting tools have simple structures, only capable of basic lifting functions, and lack radial movement devices for the slewing bearing. In actual lifting processes, interference between the lifting tool and the machining center's crossbeam can prevent the slewing bearing from being successfully placed on the worktable, thus requiring a radial movement device to position it. Furthermore, slewing bearing flipping operations require additional auxiliary equipment and complex manual operations, which is not only inefficient but also poses high safety risks. For example, some single-function lifting tools, lacking appropriate structural design, cannot guarantee the stability of the flipping process when handling large slewing bearings, easily leading to collision damage and even safety accidents. Utility Model Content

[0004] To overcome the shortcomings of the prior art, a radially movable slewing bearing lifting device and a crane including the lifting device are provided to solve the problems in the prior art.

[0005] To achieve the above objectives, a radially movable slewing bearing lifting device is provided, including a boom assembly, a tie rod cylinder, a type B key, and a motor-driven rotating arm assembly; A tie rod cylinder is installed below the boom assembly. One end of the tie rod cylinder is connected to the cylinder fixing seat via a push rod pin, and the other end is threadedly connected to the connecting seat. A motor rotating arm assembly is installed at the bottom of the boom assembly via a bracket. The boom assembly includes an upper connecting plate at the top, an oil tank cover plate connected to the upper connecting plate via a support plate, and a cylinder support for the tie rod cylinder installed at the bottom of the oil tank cover plate. The cylinder support includes a first plate, a second plate, a reinforcing plate, a connecting plate, a cylinder fixing seat, a limit block, and a V-shaped upper sliding plate. The motor rotating arm assembly includes a V-shaped lower sliding plate, a fixing plate, a round steel pipe, a lower connecting plate, a triangular fixing plate, and a hydraulic motor. The V-shaped lower sliding plate, the fixing plate, the round steel pipe, the lower connecting plate, and the triangular fixing plate are welded and fixedly connected in sequence. A pressure cap is installed at the front end of the round steel pipe via hexagonal bolts, and the hydraulic motor is installed inside the round steel pipe. The hydraulic motor is fixedly connected to the lower connecting plate via internal hexagonal bolts. The rotating shaft at the front end of the hydraulic motor extends out of the pressure cap, and a C-shaped flat key is provided on the rotating shaft.

[0006] Furthermore, the fuel tank cover is formed by welding together plates three, four, five, six, seven, eight, nine, ten, and an intermediate connecting plate. Furthermore, the B-type flat key is fixedly connected to the V-type lower slide plate via an internal hex bolt and an internally threaded cylindrical pin.

[0007] Furthermore, the connecting seat is fixedly connected to the V-shaped lower sliding plate by means of an internal hex bolt.

[0008] Furthermore, the V-shaped upper slide plate of the boom device and the V-shaped lower slide plate of the motor rotating arm device are in sliding fit, and the V-groove angle of the V-shaped upper slide plate is consistent with the V-shaped protrusion angle of the V-shaped lower slide plate, with a sliding fit gap of no more than 0.5mm.

[0009] Furthermore, the reinforcing plate in the boom device is a square structure welded between plate one and plate two, and there are 2-4 reinforcing plates, symmetrically distributed on the inner side of the connection between the connecting plate and the cylinder fixing seat. The thickness of each reinforcing plate is the same as the thickness of the connecting plate.

[0010] A crane, comprising the aforementioned radially movable slewing bearing lifting device.

[0011] The beneficial effects of this utility model are as follows: This utility model, through the design of a boom device, a radial movement device, and a motor rotating arm device, in conjunction with a lifting beam, a rotating arm device, and a clamping device, enables lateral clamping, longitudinal clamping, flipping operations, and radial movement of slewing bearings for ships and port machinery, meeting actual operational needs. It can improve the efficiency of slewing bearing hoisting, flipping, and assembly operations, reduce the labor intensity of workers, and ensure operational safety. At the same time, it has a simple structure, is easy to operate, and has broad application prospects. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the boom device of this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the structure of the boom device of this utility model. Figure 2 ; Figure 5 This is a front view of the boom device of this utility model; Figure 6 These are the right view and sectional view of the boom device of this utility model; Figure 7 This is a schematic diagram of the structure of the motor rotating arm device of this utility model. Figure 1 ; Figure 8 This is a schematic diagram of the structure of the motor rotating arm device of this utility model. Figure 2 ; Figure 9 This is a right view of the rotary motor connector of this utility model; Figure 10 This is a cross-sectional view of the rotary motor connector of this utility model.

[0013] In the diagram: 1. Boom assembly; 2. Tie rod cylinder; 3. Push rod pin; 4. Type B key; 5. Motor rotating arm assembly; 6. Connecting seat; 7. Upper connecting plate; 8. Support plate; 9. Oil tank cover; 10. Plate 1; 11. Plate 2; 12. Reinforcing plate; 13. Connecting plate; 14. Cylinder fixing seat; 15. Limiting block; 16. V-shaped upper sliding plate; 17. Plate 3; 18. Plate 4; 19. Plate 5; 20. Plate 6; 21. Plate 7; 22. Plate 8; 23. Plate 9; 24. Plate 10; 25. Intermediate connecting plate; 26. V-shaped lower sliding plate; 27. Fixing plate; 28. Round steel pipe; 29. ​​Pressure cap; 30. Type C key; 31. Rotating shaft; 32. Lower connecting plate; 33. Triangular fixing plate; 34. Hydraulic motor. Detailed Implementation

[0014] Please refer to Figures 1 to 10 As shown, this utility model provides a radially movable slewing bearing lifting device, including a boom device 1, a tie rod cylinder 2, a type B flat key 4, and a motor rotating arm device 5; A tie rod cylinder 2 is installed below the boom assembly 1. One end of the tie rod cylinder 2 is connected to the cylinder fixing seat 14 via a push rod pin 3. Cotter pins are used at both ends of the pin to prevent loosening. The other end is threadedly connected to the connecting seat 6. After tightening, thread-locking adhesive is applied to the threads to prevent loosening due to long-term vibration. A motor rotating boom assembly 5 is installed at the bottom of the boom assembly 1 via a bracket. The boom assembly 1 includes an upper connecting plate 7 at the top, an oil tank cover plate 9 connected to the upper connecting plate 7 via a support plate 8, and a cylinder support for the tie rod cylinder 2 installed at the bottom of the oil tank cover plate 9. The cylinder support includes a first plate 10, a second plate 11, a reinforcing plate 12, a connecting plate 13, a cylinder fixing seat 14, and a limit switch. Block 15 and V-shaped upper slide plate 16, motor rotating arm device 5 includes V-shaped lower slide plate 26, fixing plate 27, round steel pipe 28, lower connecting plate 32, triangular fixing plate 33 and hydraulic motor 34. V-shaped lower slide plate 26, fixing plate 27, round steel pipe 28, lower connecting plate 32 and triangular fixing plate 33 are welded and fixedly connected in sequence. The front end of round steel pipe 28 is equipped with a pressure cap 29 by hexagonal bolts, and the hydraulic motor 34 is installed inside round steel pipe 28. The hydraulic motor 34 is fixedly connected to the lower connecting plate 32 by internal hexagonal bolts. The rotating shaft 31 at the front end of the hydraulic motor 34 extends out of the pressure cap 29, and a C-shaped flat key 30 is provided on the rotating shaft 31 for connection with external clamping device. The mating clearance between the flat key and the keyway is controlled at 0.02-0.05mm to avoid slippage during operation.

[0015] The upper connecting plate 7 and the support plate 8 are fixed by submerged arc welding to ensure the stability of the top load-bearing structure. The components of the oil tank cover plate 9 and the middle connecting plate 25 are enclosed to form a rectangular frame, which is fully welded by carbon dioxide gas shielded welding. After welding, the weld is ground. The cylinder support is welded to the bottom of the oil tank cover plate 9. The reinforcing plate 12 is a square structure symmetrically distributed on the inner side of the connection between the connecting plate 13 and the cylinder fixing seat 14. The thickness of the reinforcing plate 12 is the same as that of the connecting plate 13. It is reinforced by double-sided fillet welds to effectively disperse the radial force generated by the tie rod cylinder 2 when it is working. Limiting blocks 15 are fixed on both sides of the V-shaped upper slide plate 16, and their spacing is set according to the maximum clamping width of the slewing bearing to ensure that the lifting device will not cause structural interference due to excessive displacement when it moves laterally. The fuel tank cover 9 is formed by welding together plates 17, 18, 19, 20, 21, 22, 23, 24 and the intermediate connecting plate 25. Type B flat key 4 is fixedly connected to Type V bottom slide plate 26 by internal hex bolts and internal threaded cylindrical pins.

[0016] The connecting seat 6 is fixedly connected to the V-shaped lower sliding plate 26 by means of hex socket head cap screws.

[0017] The V-shaped upper slide plate 16 of the boom assembly and the V-shaped lower slide plate 26 of the motor rotating arm assembly are in sliding fit, and the V-groove angle of the V-shaped upper slide plate 16 is consistent with the V-shaped protrusion angle of the V-shaped lower slide plate 26. The sliding fit clearance is no more than 0.5mm.

[0018] The reinforcing plate 12 in the boom device 1 is a square structure welded between plate 10 and plate 11. There are 2-4 reinforcing plates 12, which are symmetrically distributed on the inner side of the connection between the connecting plate 13 and the cylinder fixing seat 14. The thickness of each reinforcing plate 12 is the same as the thickness of the connecting plate 13.

[0019] This spreader is mainly used for the lifting, handling, and assembly of slewing bearings for ships and port machinery. By enabling multi-point clamping and attitude adjustment of the slewing bearings, it effectively improves the safety and stability of the lifting process. At least two spreaders are required during lifting, mounted on a moving lifting beam equipped with linear guide rails. This allows the boom and clamps to move synchronously to adjust the lateral clamping range. The spreader is moved above the slewing bearing of the ship and port machinery by an overhead crane, ready for clamping and lifting operations. First, the hydraulic station is started, and the oil pump motor unit drives the hydraulic motor to rotate, causing the boom and clamp to move laterally, achieving lateral clamping of the workpiece. The hydraulic cylinders are then extended and retracted to achieve longitudinal clamping of the workpiece. Pressure sensor one detects the lateral clamping force in real time, pressure sensor two detects the longitudinal clamping force in real time, and the tilt sensor detects the clamp rotation angle in real time. The extension and retraction direction and speed of the hydraulic cylinders can be adjusted in real time via remote control, improving the accuracy and flexibility of the operation. This completes the lateral clamping, longitudinal clamping, tilting, and radial movement of the slewing bearing of the ship and port machinery, meeting actual operational requirements. Explosion-proof valves are installed on the hydraulic motors and cylinders; in case of hydraulic system problems, they can mechanically self-lock to maintain the clamping state, preventing accidental workpiece loss and providing safety protection.

[0020] Lateral clamping: Start the hydraulic station, the oil pump motor unit drives the hydraulic motor 34 to rotate, and drives the rotating shaft 31 to rotate through the rectangular inner spline, thereby driving the external clamping device to move synchronously along the linear guide rail of the lifting beam. The clamping distance is adjusted according to the outer diameter of the slewing bearing. At the same time, the pressure sensor detects the clamping force in real time. When the preset value is reached, the hydraulic system automatically maintains the pressure to achieve stable clamping.

[0021] Longitudinal clamping: The remote control sends a command to drive the pull rod cylinder 2 to extend and retract, which drives the motor rotating arm device 5 to move longitudinally along the V-groove of the V-shaped upper slide plate 16. The pressure sensor 2 monitors the longitudinal clamping force in real time to avoid damage to the slewing bearing surface due to excessive clamping force.

[0022] Tilting operation: The hydraulic motor 34 drives the clamping device to rotate around the central axis of the slewing bearing through the rotating shaft 31. The tilt sensor provides real-time feedback on the rotation angle of the clamp. The operator makes fine adjustments via remote control to ensure that the slewing bearing is accurately positioned when it is rotated to the target posture. During the rotation process, the explosion-proof valve of the hydraulic system remains in standby mode. If a sudden drop in pressure occurs, the mechanical self-locking is immediately triggered to prevent the slewing bearing from falling.

[0023] Radial movement: When the lifting device interferes with the crossbeam of the machining center, the V-shaped lower slide plate 26 is driven by the hydraulic motor 34 to slide radially along the V-shaped groove of the V-shaped upper slide plate 16. The sliding fit clearance is no more than 0.5mm, ensuring that the movement is smooth and without shaking, thereby accurately placing the slewing bearing on the worktable without the need for additional auxiliary equipment to adjust the position.

Claims

1. A radially movable slewing bearing lifting device, characterized in that: It includes a boom assembly (1), a tie rod cylinder (2), a type B key (4), and a motor rotating arm assembly (5). A tie rod cylinder (2) is installed below the boom device (1). One end of the tie rod cylinder (2) is connected to the cylinder fixing seat (14) through the push rod pin (3), and the other end is threadedly connected to the connecting seat (6). A motor rotating arm device (5) is installed at the bottom of the boom device (1) through a bracket. The boom device (1) includes an upper connecting plate (7) at the top, an oil tank cover plate (9) connected to the upper connecting plate (7) through a support plate (8), and a cylinder support for the tie rod cylinder (2) installed at the bottom of the oil tank cover plate (9). The cylinder support includes a plate one (10), a plate two (11), a reinforcing plate (12), a connecting plate (13), a cylinder fixing seat (14), a limiting block (15), and a V-shaped upper sliding plate (16). The motor rotating arm device (5) is installed at the bottom of the boom device (1). The boom device (5) includes a V-shaped lower slide plate (26), a fixing plate (27), a round steel pipe (28), a lower connecting plate (32), a triangular fixing plate (33), and a hydraulic motor (34). The V-shaped lower slide plate (26), the fixing plate (27), the round steel pipe (28), the lower connecting plate (32), and the triangular fixing plate (33) are welded and fixedly connected in sequence. The front end of the round steel pipe (28) is fitted with a pressure cap (29) by hexagonal bolts, and the hydraulic motor (34) is installed inside the round steel pipe (28). The hydraulic motor (34) is fixedly connected to the lower connecting plate (32) by internal hexagonal bolts. The rotating shaft (31) at the front end of the hydraulic motor (34) extends out of the pressure cap (29), and a C-shaped flat key (30) is provided on the rotating shaft (31).

2. The radially movable slewing bearing lifting device according to claim 1, characterized in that, The oil tank cover (9) is formed by welding together three plates (17), four plates (18), five plates (19), six plates (20), seven plates (21), eight plates (22), nine plates (23), ten plates (24) and an intermediate connecting plate (25).

3. The radially movable slewing bearing lifting device according to claim 1, characterized in that, The B-type flat key (4) is fixedly connected to the V-type lower slide plate (26) by means of internal hex bolts and internal threaded cylindrical pins.

4. The radially movable slewing bearing lifting device according to claim 1, characterized in that, The connecting seat (6) is fixedly connected to the V-shaped lower slide plate (26) by means of hexagon socket bolts.

5. A radially movable slewing bearing lifting device according to claim 1, characterized in that, The V-shaped upper slide plate (16) of the boom device and the V-shaped lower slide plate (26) of the motor rotating arm device are in sliding fit, and the V-groove angle of the V-shaped upper slide plate (16) is consistent with the V-shaped protrusion angle of the V-shaped lower slide plate (26), and the sliding fit gap is no more than 0.5mm.

6. A radially movable slewing bearing lifting device according to claim 1, characterized in that, The reinforcing plate (12) in the boom device (1) is a square structure welded between plate one (10) and plate two (11), and there are 2-4 reinforcing plates (12) symmetrically distributed on the inner side of the connection between the connecting plate (13) and the cylinder fixing seat (14). The thickness of each reinforcing plate (12) is the same as the thickness of the connecting plate (13).

7. A crane, characterized in that, Includes a radially movable slewing bearing lifting device according to any one of claims 1-6.

Images