A lifting tool capable of automatically adjusting the center of gravity

Abstract

The application discloses a hoisting tool capable of automatically adjusting gravity center, which comprises a main body structure, a transverse adjusting mechanism arranged on the upper end surface of the main body structure, a connecting rod, the lower end of which is hingedly connected to the transverse adjusting mechanism, and the upper end of which is used for being connected to a hoisting rope of a hoisting machine, the connecting rod can be driven to move relatively along the transverse direction of the main body structure through the transverse adjusting mechanism, a longitudinal adjusting mechanism arranged on the transverse adjusting mechanism and driven by the transverse adjusting mechanism to realize transverse movement, the longitudinal adjusting mechanism comprises a traction member and a driving assembly, the traction member is connected to the connecting rod and the driving assembly, and the driving assembly can drive the traction member to pull the connecting rod to rotate relatively along the longitudinal direction of the main body structure, and a horizontal sensing assembly arranged on the main body structure and used for detecting the horizontal degree of the main body structure.

Description

Technical Field

[0001] This invention belongs to the field of lifting equipment technology, and in particular relates to a lifting fixture with an automatically adjustable center of gravity. Background Technology

[0002] Heliostats are large and require custom-made lifting fixtures for storage and transport. When the lifting fixture is fully loaded with heliostats, it's difficult to align the center of gravity with the crane's lifting position, leading to uneven stress and tilting during lifting. Tilting necessitates increasing the lifting height, resulting in low work efficiency and safety hazards such as worker injuries, glass breakage, and fixture deformation or breakage.

[0003] The invention patent with application number 201110026278.2 provides a self-aligning lifting device. This device has the function of automatically adjusting the center of gravity, but it requires the installation of tension sensors on all four force ropes. The center of gravity position is adjusted by the feedback signals of the sensors. The structure is relatively complex and the reliability is poor when used for outdoor handling of large and heavy items. Summary of the Invention

[0004] To address the problems in the background art, the purpose of this invention is to provide a lifting fixture with an automatically adjustable center of gravity, comprising:

[0005] Main structure;

[0006] A lateral adjustment mechanism is located on the upper surface of the main structure;

[0007] The connecting rod has its lower end hinged to the lateral adjustment mechanism and its upper end connected to the hoisting rope of the crane. The connecting rod can be driven by the lateral adjustment mechanism to move laterally relative to the main structure.

[0008] A longitudinal adjustment mechanism is provided on the lateral adjustment mechanism and is driven by the lateral adjustment mechanism to achieve lateral movement of the longitudinal adjustment mechanism; the longitudinal adjustment mechanism includes a traction member and a drive assembly, the traction member connects the connecting rod and the drive assembly, and the drive assembly can drive the traction member to pull the connecting rod to rotate longitudinally relative to the main structure;

[0009] A level sensing component is disposed on the main structure for detecting the levelness of the main structure.

[0010] Preferably, the main structure includes a frame and four lifting rods, with the upper ends of the four lifting rods respectively located at the four corners of the frame, and the lower ends of the lifting rods used for lifting the workpiece to be transferred.

[0011] Preferably, the boom includes:

[0012] A fastener is fixed to the frame, and the upper end face of the fastener is provided with several adjusting screw holes;

[0013] A locking shaft is vertically inserted through the fixing member. The upper end of the locking shaft extends above the fixing member and is provided with a fixing head. The fixing head is provided with an adjustment through hole corresponding to the adjustment screw hole.

[0014] An adjusting bolt passes through the adjusting through hole and is threaded into the adjusting screw hole;

[0015] The first rod assembly has its upper end hinged to the lower end of the adjusting bolt;

[0016] The hinged component is hinged at its upper end to the lower end of the first rod assembly;

[0017] The second rod assembly has its upper end hinged to the lower end of the hinge member;

[0018] The hook is located at the lower end of the second rod assembly.

[0019] Preferably, the traction component includes a driving sprocket, a driven sprocket, and a chain. The driving sprocket and the driven sprocket are respectively located at both ends of the longitudinal direction of the lateral adjustment mechanism and on both sides of the connecting rod. The chain is wound around the driving sprocket and the driven sprocket, and both ends of the chain are fixed to the upper end of the connecting rod. The drive assembly is connected to the driving sprocket.

[0020] Preferably, the drive component is a first motor.

[0021] Preferably, the lateral adjustment mechanism includes:

[0022] A crossbar is provided on the main structure, and both the connecting rod and the longitudinal adjustment mechanism are provided on the crossbar;

[0023] A lead screw drive mechanism is provided in the main structure and connected to the crossbar, used to drive the crossbar to move laterally;

[0024] Two sliding fasteners are fixed to the main structure and are respectively opposite to the two ends of the crossbar. The sliding fasteners are provided with extension arms extending to the upper part of the crossbar. The lower end face of the extension arm is provided with several rollers. When the crossbar is lifted, its two ends are slidably connected to the extension arm through the rollers.

[0025] Preferably, the lead screw drive mechanism includes:

[0026] A lead screw is threaded through the transverse side of the main structure and connected to the crossbar, with both ends of the lead screw being rotatably connected to the main structure.

[0027] A second motor is connected to the lead screw and drives it to rotate.

[0028] Preferably, a lateral locking device is provided at the end of the crossbar, the lateral locking device comprising:

[0029] An adapter is fixed to the side of the end of the crossbar;

[0030] A third motor is mounted on the adapter.

[0031] A T-shaped groove is provided on the main structure and opened laterally therein. The T-shaped groove is located on the end side of the crossbar and is opposite to the third motor.

[0032] The upper end of the locking bolt is coaxially fixed to the output shaft of the third motor.

[0033] A T-shaped nut is provided in the T-shaped groove and its shape matches the groove. The T-shaped nut is threaded to the lower end of the locking bolt.

[0034] Preferably, the horizontal sensing component includes two pendulum mechanisms, respectively arranged along the transverse and longitudinal directions of the main structure, and the pendulum mechanism includes:

[0035] The base is fixed to the main structure;

[0036] The pendulum is hinged to the base at its upper end.

[0037] Two side arms are respectively located on both sides of the base;

[0038] Two proximity sensors are respectively located on the two side arms and are respectively opposite to the two sides of the pendulum.

[0039] Preferably, the pendulum mechanism is provided with a pendulum locking assembly, which includes two locking cylinders respectively located on the two side arms, and the extension rods of the two locking cylinders are respectively opposite to the two sides of the pendulum.

[0040] Because of the above technical solutions, this invention has the following advantages and positive effects compared with the prior art:

[0041] 1. When the crane of the present invention lifts the connecting rod, the lateral adjustment mechanism and the main structure by means of the lifting rope, the lateral adjustment mechanism and the longitudinal adjustment mechanism drive the main structure to lateral and longitudinal self-alignment. The horizontal sensing component detects the levelness of the main structure in real time to control the action of the lateral adjustment mechanism and the longitudinal adjustment mechanism, thereby realizing the automatic self-alignment of the main structure, so that the workpiece can be kept horizontal when lifting, and the transportation can be stable.

[0042] 2. The present invention is equipped with a lateral locking device, which can lock the crossbar after it has been moved into place to prevent it from shaking.

[0043] 3. The present invention is equipped with a pendulum locking component, which can lock the pendulum after it is adjusted to the horizontal position to prevent it from shaking and affecting the overall stability. Attached Figure Description

[0044] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0045] Figure 1 This is a schematic diagram of the workpiece being hoisted according to the present invention;

[0046] Figure 2 This is a schematic diagram of the present invention without the workpiece being hoisted.

[0047] Figure 3 This is a partial enlargement of the present invention. Figure 1 ;

[0048] Figure 4 This is a partial enlargement of the present invention. Figure 2 ;

[0049] Figure 5 This is a partial enlargement of the present invention. Figure 3 ;

[0050] Figure 6 This is a schematic diagram of the horizontal sensing component of the present invention;

[0051] Figure 7 This is a schematic diagram of the lifting rod of the present invention.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1: Frame; 2: Lifting rod; 3: Transfer fixture; 4: Heliostat; 5: Connecting rod; 6: Fixture; 7: Locking shaft; 8: Fixing head; 9: Adjusting bolt; 10: First rod group; 11: Hinge; 12: Second rod group; 13: Hook; 14: Drive sprocket; 15: Driven sprocket; 16: Chain; 17: Crossbar; 18: Lead screw; 19: Sliding fixture; 20: Roller; 21: Extension arm; 22: Adapter; 23: Third motor; 24: Limit rail; 25: Base; 26: Pendulum; 27: Side arm; 28: Proximity sensor; 29: Locking cylinder. Detailed Implementation

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0055] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0056] See Figures 1 to 7 The core of this invention is to provide a lifting fixture with an automatically adjustable center of gravity, including a main structure, a lateral adjustment mechanism, a connecting rod 5, a longitudinal adjustment mechanism, and a horizontal sensing component.

[0057] The main structure includes a frame 1 and four lifting rods 2. The upper ends of the four lifting rods 2 are respectively located at the four corners of the frame 1, and the lower ends of the lifting rods 2 are used to lift the workpiece to be transferred. In this embodiment, the workpiece to be transferred is placed on a transfer fixture 3, and the lower ends of the lifting rods 2 hook onto the transfer fixture 3 to achieve lifting. Specifically, the lifting rod 2 includes a fixing component 6, a locking shaft 7, an adjusting bolt 9, a first rod group 10, a hinge component 11, a second rod group 12, and a hook 13.

[0058] The fixing member 6 is fixed to the frame 1, and its upper end face has several adjusting screw holes. The locking shaft 7 is vertically inserted through the fixing member 6, with its upper end extending above the fixing member 6 and having a fixing head 8. The locking shaft 7 is vertically fixed to the fixing member 6 via the fixing head 8. The fixing head 8 has adjusting through holes corresponding to the adjusting screw holes; that is, by rotating the locking shaft 7 and the fixing head 8, the adjusting through holes can be aligned with different adjusting screw holes. The adjusting bolt 9 passes through the adjusting through hole and is threaded into the adjusting screw hole. By aligning the adjusting through hole with different adjusting screw holes, the adjusting bolt 9 is fixed in different adjusting screw holes, thereby achieving circumferential position adjustment of the locking shaft 7.

[0059] The upper end of the first linkage 10 is hinged to the lower end of the adjusting bolt 9, the upper end of the hinge 11 is hinged to the lower end of the first linkage 10, the upper end of the second linkage 12 is hinged to the lower end of the hinge 11, and the hook 13 is located at the lower end of the second linkage 12. Both the first linkage 10 and the second linkage 12 are two-bar linkages.

[0060] The lateral adjustment mechanism is located on the upper surface of frame 1. The lower end of connecting rod 5 is hinged to the lateral adjustment mechanism, and the upper end is used to connect to the hoisting rope of the crane. Connecting rod 5 can be driven by the lateral adjustment mechanism to move laterally relative to the main structure. The longitudinal adjustment mechanism is also located on the lateral adjustment mechanism, and the longitudinal adjustment mechanism is driven by the lateral adjustment mechanism to achieve lateral movement.

[0061] The lateral adjustment mechanism includes a crossbar 17, a lead screw drive mechanism, and two sliding fixing parts 19. The crossbar 17 is mounted on the frame 1, the connecting rod 5 is hinged to the crossbar 17, and the longitudinal adjustment mechanism is fixed on the crossbar 17.

[0062] A lead screw drive mechanism is located in the main structure and connected to the crossbar 17, used to drive the crossbar 17 to move laterally;

[0063] Two sliding fasteners 19 are fixed to the main structure and are respectively opposite to the two ends of the crossbar 17. The sliding fasteners 19 are provided with extension arms 21 extending to the upper end of the crossbar 17. Several rollers 20 are provided on the lower end face of the extension arms 21. When the crossbar 17 is lifted, its two ends are slidably connected to the extension arms 21 through the rollers 20, and the crossbar 17 is supported by the extension arms 21.

[0064] The lead screw drive mechanism includes a lead screw 18 and a second motor. The lead screw 18 is threaded through the main structure and connected to the crossbar 17, and both ends of the lead screw 18 are rotatably connected to the main structure. The second motor is connected to the lead screw 18 and drives it to rotate. In this embodiment, two lead screw 18 drive mechanisms are provided.

[0065] The position of the adjusting link 5 on the frame 1 is achieved by moving the horizontal bar 17 horizontally, thereby adjusting the center of gravity of the frame 1.

[0066] The system also includes a transverse locking device, located at the end of the crossbar 17. In this embodiment, four devices are provided, one on each side of the crossbar 17. The transverse locking device includes an adapter 22, a third motor 23, a T-slot, a locking bolt, and a T-nut. The adapter 22 is fixed to the side of the end of the crossbar 17, and the third motor 23 is mounted on the adapter 22. The T-slot is located on both sides of the frame 1 and extends transversely, situated at the end of the crossbar 17 and opposite to the third motor 23. The upper end of the locking bolt is coaxially fixed to the output shaft of the third motor 23. The T-nut is located within the T-slot and its shape matches the T-slot. The T-nut is threadedly connected to the lower end of the locking bolt. The third motor 23 drives the locking bolt to rotate clockwise, causing the locking bolt to move the T-nut upwards, ultimately locking the T-nut into the T-slot and thus locking the crossbar 17 onto the frame 1.

[0067] A limiting slide rail 24 is provided on the frame 1 corresponding to the position of each adapter 22. The adapter 22 is located on the limiting slide rail 24. A limiting protrusion is provided at the end of the limiting slide rail 24 away from the adapter 22 to limit the position of the adapter 22 and the crossbar 17 when they move laterally.

[0068] The longitudinal adjustment mechanism includes a traction component and a drive assembly. The traction component connects the connecting rod 5 and the drive assembly. The drive assembly can drive the traction component to pull the connecting rod 5 to rotate longitudinally relative to the frame 1, thereby changing the longitudinal center of gravity of the frame 1.

[0069] Specifically, the traction component includes a drive sprocket 14, a driven sprocket 15, and a chain 16. The drive sprocket 14 and driven sprocket 15 are respectively located at both ends of the longitudinal direction of the crossbar 17 and on both sides of the connecting rod 5. The chain 16 is wound around the drive sprocket 14 and driven sprocket 15, and both ends of the chain 16 are fixed to the upper end of the connecting rod 5. The drive assembly is connected to the drive sprocket 14. In this embodiment, the drive assembly is a first motor. The first motor drives the chain 16 to tilt the connecting rod 5, thereby adjusting the longitudinal center of gravity.

[0070] A level sensing component is located on the main structure and is used to detect the levelness of frame 1. The level sensing component includes two pendulum mechanisms 26, which are respectively arranged along the transverse and longitudinal directions of frame 1, and are used to detect the transverse and longitudinal levelness of frame 1, specifically located at the middle position of the longitudinal end and the middle position of the transverse end of frame 1. Specifically, the pendulum mechanism includes a base 25, a pendulum 26, two side arms 27, and two proximity sensors 28.

[0071] The base 25 is fixed to the main structure. The upper end of the pendulum 26 is hinged to the base 25 via a pivot. Two side arms 27 are respectively located on both sides of the base 25. Two proximity sensors 28 are respectively located on the two side arms 27 and are opposite to the two sides of the pendulum 26. The verticality of the pendulum 26 is detected by the distance between the two proximity sensors 28 and the sides of the pendulum 26, and further, the horizontality of the frame 1 is detected.

[0072] Specifically, since the pendulum 26 remains vertical due to gravity, when the frame 1 tilts, the distance between the two proximity sensors 28 and the sides of the pendulum 26 changes. When the distance becomes small enough, the proximity sensors 28 send signals to the first and second motors, causing them to drive the crossbar 17 and connecting rod 5 to adjust the center of gravity laterally and longitudinally. The two proximity sensors 28 of the pendulum mechanism located laterally on the frame 1 send signals to the second motor for forward and reverse rotation, respectively, while the two proximity sensors 28 of the pendulum mechanism located longitudinally on the frame 1 send signals to the first motor for forward and reverse rotation, respectively.

[0073] Preferably, the pendulum mechanism also includes a pendulum locking assembly, which includes two locking cylinders 29, respectively located on the two side arms 27. The telescopic rods of the two locking cylinders 29 are respectively opposite to the two sides of the pendulum 26, and extend to abut against the pendulum 26 to lock it. This prevents the pendulum 26 from wobbling after the leveling is in place, thus affecting the overall stability.

[0074] The working process of this invention will be further explained below:

[0075] First, a crane or overhead trolley lifts the connecting rod 5, crossbar 17 and frame 1 to a certain height using lifting ropes. Then, the hooks 13 at the lower ends of the four lifting rods 2 are hung on the lifting rings of the transfer fixture 3 containing the workpiece. In this embodiment, the workpiece is a heliostat 4.

[0076] The circumferential direction of the boom 2 is adjusted by locking shaft 7. After adjustment, it is locked by adjusting bolt 9 to prevent the boom 2 from rotating and colliding with the heliostat 4. The hinge 11 on the boom 2 facilitates the operation flexibility of the hook 13.

[0077] Then the crane lifts frame 1 and transfer fixture 3. If the center of gravity of transfer fixture 3 is not in line with the center of gravity of frame 1, frame 1 and transfer fixture 3 will tilt. This will be sensed by the pendulum mechanism, which will then feed back to the horizontal adjustment mechanism and the vertical adjustment mechanism to adjust the center of gravity in the horizontal and vertical directions until frame 1 and transfer fixture 3 are level.

[0078] After the center of gravity is adjusted to the correct position, the lateral locking device and the pendulum locking assembly lock the crossbar 17 and the pendulum 26 respectively.

[0079] This invention incorporates a pendulum mechanism 26. Utilizing the principle that the pendulum 26 remains vertical under gravity, when the frame 1 tilts due to a shift in its center of gravity, it forms a certain angle with the pendulum 26. The pendulum 26 approaches the proximity sensor 28, and the control system feeds back to the first and second motors, driving the lateral and longitudinal adjustment mechanisms to achieve horizontal adjustment. This achieves the stable center of gravity of the lifting and transport fixture 3, which is capable of automatically adjusting its center of gravity. A triangular stable structure is formed by the chain 16 and the connecting rod 5. The rotation of the drive sprocket 14 on the chain 16 causes the chain 16 to move within a certain range, lengthening one side of the chain while shortening the other, thereby driving the central connecting rod 5 to tilt, achieving automatic adjustment of the longitudinal center of gravity.

[0080] This invention ensures the stability and levelness of heliostat transport, and is suitable for lifting and moving large, heavy, and unstable items such as heliostat transport fixtures in workshops and outdoors.

[0081] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A lifting fixture with an automatically adjustable center of gravity, characterized in that, include: Main structure; A lateral adjustment mechanism is located on the upper surface of the main structure; The connecting rod has its lower end hinged to the lateral adjustment mechanism and its upper end connected to the hoisting rope of the crane. The connecting rod can be driven by the lateral adjustment mechanism to move laterally relative to the main structure. A longitudinal adjustment mechanism is provided on the lateral adjustment mechanism and is driven by the lateral adjustment mechanism to achieve lateral movement of the longitudinal adjustment mechanism; the longitudinal adjustment mechanism includes a traction member and a drive assembly, the traction member connects the connecting rod and the drive assembly, and the drive assembly can drive the traction member to pull the connecting rod to rotate longitudinally relative to the main structure; A horizontal sensing component is disposed on the main structure for detecting the horizontality of the main structure; The traction component includes a drive sprocket, a driven sprocket, and a chain. The drive sprocket and the driven sprocket are respectively located at both ends of the longitudinal direction of the lateral adjustment mechanism and on both sides of the connecting rod. The chain is wound around the drive sprocket and the driven sprocket, and both ends of the chain are fixed to the upper end of the connecting rod. The drive assembly is connected to the drive sprocket.

2. The lifting fixture with automatically adjustable center of gravity according to claim 1, characterized in that, The main structure includes a frame and four lifting rods. The upper ends of the four lifting rods are respectively located at the four corners of the frame, and the lower ends of the lifting rods are used to lift the workpiece to be transferred.

3. The lifting fixture with automatically adjustable center of gravity according to claim 2, characterized in that, The boom includes: A fastener is fixed to the frame, and the upper end face of the fastener is provided with several adjusting screw holes; A locking shaft is vertically inserted through the fixing member. The upper end of the locking shaft extends above the fixing member and is provided with a fixing head. The fixing head is provided with an adjustment through hole corresponding to the adjustment screw hole. An adjusting bolt passes through the adjusting through hole and is threaded into the adjusting screw hole; The first rod assembly has its upper end hinged to the lower end of the adjusting bolt; The hinged component is hinged at its upper end to the lower end of the first rod assembly; The second rod assembly has its upper end hinged to the lower end of the hinge member; The hook is located at the lower end of the second rod assembly.

4. The lifting fixture with automatically adjustable center of gravity according to claim 1, characterized in that, The drive component is a first motor.

5. The lifting fixture with automatically adjustable center of gravity according to claim 1, characterized in that, The lateral adjustment mechanism includes: A crossbar is provided on the main structure, and both the connecting rod and the longitudinal adjustment mechanism are provided on the crossbar; A lead screw drive mechanism is provided in the main structure and connected to the crossbar, used to drive the crossbar to move laterally; Two sliding fasteners are fixed to the main structure and are respectively opposite to the two ends of the crossbar. The sliding fasteners are provided with extension arms extending to the upper part of the crossbar. The lower end face of the extension arm is provided with several rollers. When the crossbar is lifted, its two ends are slidably connected to the extension arm through the rollers.

6. The lifting fixture with automatically adjustable center of gravity according to claim 5, characterized in that, The lead screw drive mechanism includes: A lead screw is threaded through the transverse side of the main structure and connected to the crossbar, with both ends of the lead screw being rotatably connected to the main structure. A second motor is connected to the lead screw and drives it to rotate.

7. The lifting fixture with automatically adjustable center of gravity according to claim 5, characterized in that, Includes a lateral locking device disposed at the end of the crossbar, the lateral locking device comprising: An adapter is fixed to the side of the end of the crossbar; A third motor is mounted on the adapter. A T-shaped groove is provided on the main structure and opened laterally therein. The T-shaped groove is located on the end side of the crossbar and is opposite to the third motor. The upper end of the locking bolt is coaxially fixed to the output shaft of the third motor. A T-shaped nut is provided in the T-shaped groove and its shape matches the groove. The T-shaped nut is threaded to the lower end of the locking bolt.

8. The lifting fixture with automatically adjustable center of gravity according to claim 1, characterized in that, The horizontal sensing component includes two pendulum mechanisms, respectively arranged along the transverse and longitudinal directions of the main structure. Each pendulum mechanism includes: The base is fixed to the main structure; The pendulum is hinged at its upper end to the base. Two side arms are respectively located on both sides of the base; Two proximity sensors are respectively located on the two side arms and are respectively opposite to the two sides of the pendulum.

9. The lifting fixture with automatically adjustable center of gravity according to claim 8, characterized in that, The pendulum mechanism is equipped with a pendulum locking assembly, which includes two locking cylinders, respectively located on the two side arms, with the extension rods of the two locking cylinders facing the two sides of the pendulum.

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