Two-stage multipoint synchronous lifting sling

Abstract

The embodiment of the invention provides a two-stage multi-point synchronous lifting sling. The two-stage multi-point synchronous lifting sling comprises a lifting frame, a driving assembly and a plurality of lifting assemblies. Wherein the driving assembly is fixedly connected with the hanging bracket; the multiple lifting assemblies are arranged on the hanging bracket at intervals, each lifting assembly is connected with the driving assembly, the driving assembly drives all the lifting assemblies to move synchronously, and therefore goods are jointly lifted at multiple points. The planetary gear speed reducer and the rotary speed reducer are connected in series for use, so that the independent adjustment function of four paths of lifting assemblies can be realized. And the rotary speed reducer rotates simultaneously to realize a redundant lifting function.

Description

Technical Field

[0001] The present application relates to the technical field of slings, and in particular to a two-stage multi-point synchronous lifting sling. Background Art

[0002] A pre-research product development project necessitated the design of a multi-point synchronous lifting sling for product load hoisting testing. This sling required a two-stage lifting system with a longitudinal span of 5000mm and a transverse span of 2500mm, capable of lifting a load of 25t. The sling was required to have a two-stage lifting function to reduce the need for crane height in the factory building. It also required four-way synchronous lifting with high synchronization reliability. Four independent wire rope adjustments were required to meet the requirements for four-point leveling and load distribution. Furthermore, it was required to have a redundant power lifting function to provide backup power in the event of a main lifting motor failure.

[0003] However, currently, existing spreaders cannot meet the above requirements at the same time, and need to be invented, created, developed and designed. Summary of the Invention

[0004] The embodiment of the present application provides a two-stage multi-point synchronous lifting sling to solve the problem that the existing technology cannot simultaneously solve two-stage lifting, four-way mechanical synchronous lifting, four-way independent adjustment of wire ropes, and redundant power lifting.

[0005] The embodiment of the present application provides a two-stage multi-point synchronous lifting sling, comprising:

[0006] hanger;

[0007] a drive assembly, fixedly connected to the hanger;

[0008] A plurality of lifting assemblies are arranged at intervals on the hanger, and each of the lifting assemblies is connected to the driving assembly. The driving assembly drives all the lifting assemblies to move synchronously to lift the cargo.

[0009] In a feasible implementation, the drive assembly includes a drive motor, a first commutator, at least two second commutators, and a plurality of planetary gear reducers;

[0010] The driving motor, the first commutator and at least two of the second commutators are all fixedly connected to the hanger;

[0011] The first commutator is fixedly connected to the hanger, the drive motor is connected to the first commutator, the first commutator is respectively connected to all the second commutators through a transmission rod, each of the second commutators is respectively connected to the input shafts of at least two of the planetary gear reducers, and each of the planetary gear reducers is connected to a corresponding one of the lifting assemblies.

[0012] In a feasible implementation, the lifting assembly includes a lifting drum, a lifting rope, a guide wheel and a pulley;

[0013] The lifting drum is rotatably connected to the drum mounting seat provided on the hanger, and the output shaft of the planetary gear reducer is connected to the lifting drum; the guide wheel is rotatably connected to the mounting pin shaft provided on the hanger, the lifting rope is passed through the pulley, and the two ends of the lifting rope are wound around the lifting drum and the lifting rope is placed on the guide wheel.

[0014] The lifting drum is configured as a duplex drum.

[0015] In a feasible implementation, the lifting assembly includes a mounting pin, the mounting pin is connected to the hanger, the guide wheel is cooperatively connected to the mounting pin, and the guide wheel selectively moves along the axial direction of the mounting pin.

[0016] In a feasible implementation, the pulley includes a lifting plate and a pulley, the pulley is cooperatively arranged on the lifting plate, the lifting rope is passed through the space between the lifting plate and the pulley, and the lifting rope is cooperatively connected to the pulley.

[0017] In a feasible implementation, the synchronous lifting spreader further includes a redundant adjustment component;

[0018] The redundant adjustment assembly includes a rotary reducer and a servo motor, the outer ring of the rotary reducer is fixedly connected to the lifting drum mounting frame, and the inner ring of the rotary reducer is fixedly connected to the outer shell of the planetary gear reducer;

[0019] The servo motor is fixedly connected to the hanger, and the output end of the servo motor is connected to the input end of the rotary reducer.

[0020] In a feasible implementation, the synchronous lifting spreader further includes a brake assembly;

[0021] The brake assembly includes a brake wheel and a clamping assembly. The brake wheel is fixedly connected to the transmission rod. The clamping assembly is fixedly connected to the hanger. The clamping assembly is cooperatively arranged on the brake wheel. The clamping assembly selectively clamps the brake wheel to brake the transmission rod.

[0022] In a feasible implementation, the synchronous lifting sling further includes a lifting ring and a plurality of lifting straps, one end of each of the lifting straps is connected to the lifting ring, and the other end of each of the lifting straps is connected to the hanger.

[0023] In a feasible implementation, the driving motor is configured as a variable frequency motor, and the variable frequency motor selectively adjusts the lifting speed.

[0024] In a feasible implementation, when the drive motor fails, the brake assembly brakes, the servo motor drives the inner ring of the rotary reducer to rotate, the inner ring of the rotary reducer drives the outer shell of the planetary gear reducer to rotate, and the output shaft of the planetary gear reducer rotates, further driving the lifting drum to complete synchronous lifting and realize redundant power lifting function.

[0025] The present invention provides a two-stage, multi-point synchronous lifting sling, comprising a hanger, a drive assembly, and multiple lifting assemblies. The drive assembly is fixedly connected to the hanger. The multiple lifting assemblies are spaced apart on the hanger, each of which is connected to the drive assembly. The drive assembly drives all lifting assemblies to move synchronously, thereby lifting cargo at multiple points. The series connection of a planetary gear reducer and a slewing reducer enables independent adjustment of four lifting assemblies. The simultaneous rotation of the slewing reducers enables redundant lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0027] In the attached figure:

[0028] Figure 1 This is a schematic diagram of the overall structure of a two-stage multi-point synchronous lifting sling provided in one embodiment of the present application;

[0029] Figure 2 yes Figure 1 A partial enlarged view of area A in the middle;

[0030] Figure 3 yes Figure 1 A partial enlarged view of the middle B area;

[0031] Figure 4 yes Figure 1 A top view of a two-stage multi-point synchronous lifting spreader;

[0032] Description of reference numerals:

[0033] 100-hanging bracket; 200-driving assembly; 300-lifting assembly; 400-redundant adjustment assembly; 500-brake assembly; 600-reel mounting seat; 700-lifting ring; 800-lifting belt;

[0034] 210 - drive motor; 220 - first commutator; 230 - second commutator; 240 - planetary gear reducer; 310 - hoisting drum; 320 - hoisting rope; 330 - guide wheel; 340 - pulley; 350 - mounting pin; 410 - rotary reducer; 420 - servo motor; 510 - brake wheel; 520 - clamping assembly;

[0035] 341-Lifting plate; 342-Pulley. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will provide a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0037] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] A pre-research product development project required the design of a multi-point synchronous lifting sling for product load hoisting testing. The sling required a two-stage lifting system with a longitudinal span of 5000mm and a transverse span of 2500mm, capable of lifting a load of 25t. The sling should feature two-stage lifting to reduce the need for crane height in the factory building. It should also have four synchronous lifting mechanisms with high synchronization reliability. It should also feature four independent wire rope adjustments to meet four-point leveling and load-balancing requirements. It should also have redundant power lifting capabilities to provide backup power in the event of a main lifting motor failure.

[0041] However, currently, existing spreaders cannot meet the above requirements at the same time, and need to be invented, created, developed and designed.

[0042] In order to solve the problem that the existing technology cannot simultaneously solve two-stage lifting, four-way mechanical synchronous lifting, four-way independent adjustment of wire ropes, and redundant power lifting, the embodiment of the present application provides a two-stage multi-point synchronous lifting sling. The solution provided by the embodiment of the present application will be described in detail below in conjunction with the drawings in the specification.

[0043] Figure 1 This is a schematic diagram of the overall structure of a two-stage multi-point synchronous lifting sling provided in one embodiment of the present application; Figure 2 yes Figure 1 A partial enlarged view of area A in the middle; Figure 3 yes Figure 1 A partial enlarged view of the middle B area; Figure 4 yes Figure 1 A top view of a two-stage, multi-point synchronous lifting spreader.

[0044] Reference Figures 1 to 4 As shown, the embodiment of the present application provides a two-stage multi-point synchronous lifting spreader, comprising a hanger 100, a drive assembly 200, and multiple lifting assemblies 300. The drive assembly 200 is fixedly connected to the hanger 100. The multiple lifting assemblies 300 are spaced apart on the hanger 100, and each lifting assembly 300 is connected to the drive assembly 200. The drive assembly 200 drives all the lifting assemblies 300 to move synchronously, thereby lifting cargo at multiple points. Since cargo is lifted at multiple points simultaneously, the cargo's posture can be kept stable.

[0045] Continue to refer to Figure 1 and Figure 2As shown, in some examples, the drive assembly 200 includes a drive motor 210, a first commutator 220, at least two second commutators 230 and a plurality of planetary gear reducers 240. The drive motor 210, the first commutator 220 and the at least two second commutators 230 are all fixedly connected to the hanger 100. Exemplarily, the first commutator 220 is fixedly arranged in the middle position of the frame, and has a first input end and two output ends. The drive motor 210 is fixedly mounted on the first commutator 220 through a mounting base, and the output end of the drive motor 210 is connected to the input end of the first commutator 220. The two second commutators 230 are fixedly arranged on both sides of the first commutator 220, and each second commutator 230 has an input end and two output ends.

[0046] The two output ends of the first commutator 220 are connected to the input end of the second commutator 230 via a transmission rod. In the embodiment of the present application, the drive assembly 200 has a total of four planetary gear reducers 240 and four lifting assemblies 300. A planetary gear reducer 240 is provided on the left and right sides of each second commutator 230. Each output end of the second commutator 230 is connected to the input end of the planetary gear reducer 240 at the corresponding position via a transmission rod and a coupling, and the output shaft of the planetary gear reducer 240 is connected to the lifting assembly 300 on one side thereof. It can be understood that the drive motor 210, through the action of the first commutator 220 and the second commutator 230, divides the power into four paths and simultaneously drives the four lifting assemblies 300 to lift the goods. Since the four lifting assemblies 300 are powered by the same drive motor 210, it can ensure that the four lifting assemblies 300 operate simultaneously, ensuring that the goods are stably lifted in a stable posture.

[0047] For example, the hanger 100 is mainly formed by welding a rectangular tube and a steel plate, and the material may be Q355. The driving motor 210 may be a variable frequency motor.

[0048] Continue to refer to Figure 1 As shown, the hoist assembly 300 includes a hoist drum 310, a hoist rope 320, a guide wheel 330, and a pulley 340. The hoist drum 310 is rotatably connected to the hanger 100. Specifically, a drum mounting base 600 is fixedly mounted on the hanger 100, and the hoist drum 310 is rotatably mounted on the drum mounting base 600. The output end of the planetary gear reducer 240 is connected to the hoist drum 310. In other words, the power output by the planetary gear reducer 240 drives the hoist drum 310 to rotate.

[0049] The guide wheel 330 is rotatably connected to the hanger 100 via a pin. The hoist rope 320 is threaded through the pulley 340. Both ends of the hoist rope 320 are wound around the hoist drum 310, and the hoist rope 320 is resting on the guide wheel 330. In other words, both ends of the hoist rope 320 are wound around the hoist drum 310, while the middle portion of the hoist rope 320 passes through and rests on the pulley 342 of the pulley 340. When the planetary gear reducer 240 drives the hoist drum 310 to rotate, the hoist rope 320 gradually winds around the hoist drum 310, and simultaneously, the hoist rope 320 drives the pulley 340 upward.

[0050] For example, the lifting rope 320 may be a steel wire rope, and the lifting drum 310 may be a double drum with a single layer of winding, which can reduce the diameter of the steel wire rope, make the structure compact, and prevent the rope from becoming tangled.

[0051] In addition, refer to Figure 1 and Figure 3 As shown, the lifting assembly 300 includes a mounting pin 350 connected to the edge of the hanger 100, and a guide wheel 330 is cooperatively connected to the mounting pin 350. The guide wheel 330 selectively moves along the axial direction of the mounting pin 350. Specifically, the guide wheel 330 can adaptively move along the axial direction of the mounting pin 350 according to the position of the lifting rope 320 on the lifting drum 310, thereby preventing the lifting rope 320 from being separated from the guide wheel 330 during movement.

[0052] Continue to refer to Figure 1 As shown, for example, the pulley 340 includes a lifting plate 341 and a pulley 342. The pulley 342 is mounted on the lifting plate 341. The lifting rope 320 is passed through the space between the lifting plate 341 and the pulley 342, and the lifting rope 320 is coupled to the pulley 342. The lifting plate 341 can be used to connect the object to be lifted, and the lifting rope 320 is used to increase the height of the hook 341.

[0053] Continue to refer to Figure 1 and Figure 2 As shown, in certain embodiments of the application, the synchronous lifting sling further includes a plurality of redundant adjustment assemblies 400. Each lifting assembly 300 is provided with a corresponding redundant adjustment assembly 400, and the redundant adjustment assembly 400 can drive the corresponding lifting assembly 300 to operate. Exemplarily, the redundant adjustment assembly 400 includes a rotary reducer 360 and a servo motor 420. The outer ring of the rotary reducer 360 is fixedly connected to the lifting drum mounting frame 600, and the inner ring of the rotary reducer 360 is fixedly connected to the outer housing of the planetary gear reducer 340.

[0054] It is understood that the servo motor 420 can drive the inner ring of the rotary reducer 360 to rotate. When the drive motor 210 stops rotating, the output end of the planetary gear reducer 240 also stops rotating. The servo motor 420 can then be controlled to rotate, causing the inner ring of the rotary reducer 360 to rotate, thereby driving the outer housing of the planetary gear reducer 240 to rotate. The output end of the planetary gear reducer 240 then drives the corresponding hoist drum 310 to rotate, thereby adjusting the height of the corresponding hoist rope 320. In other words, if the droop length of the hoist rope 320 of the synchronous hoist sling varies, the operator can adjust the droop length of each hoist rope 320 using the independent adjustment assembly corresponding to each hoist rope 320.

[0055] When the servo motor 420 stops, the worm gear assembly in the rotary reducer 360 can be self-locking, which can fix the position of the inner ring of the rotary reducer 360, thereby keeping the outer housing of the planetary gear reducer 240 stationary.

[0056] In addition, the synchronous lifting spreader also includes a brake assembly 500. The brake assembly 500 is used to control the rotation of the dual drums in the lifting assembly 300. For example, in this embodiment of the present application, the synchronous lifting spreader includes two brake assemblies 500, which are respectively disposed on either side of the first commutator 220 and connected to the transmission rod between the first commutator 220 and the second commutator 230, to meet the overall reliability requirements of the synchronous lifting spreader.

[0057] Specifically, the brake assembly 500 includes a brake wheel 510 and a clamping assembly 520. The brake wheel 510 is fixedly connected to the transmission rod through an installation key. The clamping assembly 520 is fixedly connected to the hanger 100, and the clamping assembly 520 is cooperatively arranged on the brake wheel 510. The clamping assembly 520 can selectively clamp the brake wheel 510, thereby braking the transmission rod.

[0058] Continue to refer to Figure 1 As shown, the synchronous lifting sling further includes a lifting ring 700 and a plurality of lifting straps 800. One end of each lifting strap 800 is connected to the lifting ring 700, and the other end of each lifting strap 800 is connected to the hanger 100. The crane can be connected to the hanger 100 via the lifting ring 700 and the lifting straps 800. In addition, in order to ensure the stability of the hanger 100, the plurality of lifting straps 800 can be evenly distributed around the edge of the hanger 100.

[0059] The synchronous lifting sling is in the form of a hanger 100 structure with a compact space structure and a lightweight design. The upper sling 800 is directly hung into the crane lifting plate 341 through a lifting ring 700, and the operation is simple and convenient.

[0060] Furthermore, this synchronized lifting sling offers a two-stage lifting function, reducing the need for crane height. During the second stage of lifting, a single variable-frequency motor drives the sling, ensuring good synchronization and adjustable lifting speed. Furthermore, the combined use of a rotary reducer 360 and a planetary gear reducer 240 allows for independent adjustment of the length of each lifting rope 320, ensuring that each rope 320 has the same droop and receives equal force, ensuring the correct position of the hoisted object.

[0061] When the driving motor 210 fails, the input shaft of the planetary gear reducer 240 cannot rotate. The 4-way rotary reducer 360 can be used to drive the planetary gear reducer 240 housing to rotate, so that the output shaft of the planetary gear reducer 240 rotates to drive the lifting drum 310 to lift the cargo, thereby realizing a redundant power lifting function.

[0062] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0063] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A two-stage multi-point synchronous lifting spreader, characterized in that: include: Hanger (100); A drive assembly (200) fixedly connected to the hanger (100); A plurality of lifting assemblies (300) are arranged at intervals on the hanger (100), and each of the lifting assemblies (300) is connected to the driving assembly (200). The driving assembly (200) drives all the lifting assemblies (300) to move synchronously to lift cargo.

2. The two-stage multi-point synchronous lifting sling according to claim 1, characterized in that: The drive assembly (200) includes a drive motor (210), a first commutator (220), at least two second commutators (230), and a plurality of planetary gear reducers (240); The driving motor (210), the first commutator (220), and at least two of the second commutators (230) are all fixedly connected to the hanger (100); The first commutator (220) is fixedly connected to the hanger (100), the drive motor (210) is connected to the first commutator (220), the first commutator (220) is respectively connected to all the second commutators (230) through a transmission rod, each of the second commutators (230) is respectively connected to the input shafts of at least two of the planetary gear reducers (240), and each of the planetary gear reducers (240) is connected to a corresponding one of the lifting assemblies (300).

3. The two-stage multi-point synchronous lifting sling according to claim 2, characterized in that: The lifting assembly (300) includes a lifting drum (310), a lifting rope (320), a guide wheel (330) and a pulley (340); The lifting drum (310) is rotatably connected to a drum mounting seat (600) provided on the hanger (100), and the output shaft of the planetary gear reducer (240) is connected to the lifting drum (310); the guide wheel (330) is rotatably connected to a mounting pin provided on the hanger (100), the lifting rope (320) is passed through the pulley (340), and both ends of the lifting rope (320) are wound around the lifting drum (310), and the lifting rope (320) is placed on the guide wheel (330); The lifting drum (310) is configured as a double drum.

4. The two-stage multi-point synchronous lifting sling according to claim 3, characterized in that: The lifting assembly (300) includes a mounting pin (350), the mounting pin (350) is connected to the hanger (100), the guide wheel (330) is cooperatively connected to the mounting pin (350), and the guide wheel (330) selectively moves along the axial direction of the mounting pin (350).

5. The two-stage multi-point synchronous lifting sling according to claim 4, characterized in that: The pulley (340) includes a lifting plate (341) and a pulley (342), the pulley (342) is arranged on the lifting plate (341), the lifting rope (320) is passed through the space between the lifting plate (341) and the pulley (342), and the lifting rope (320) is connected to the pulley (342).

6. The two-stage multi-point synchronous lifting sling according to claim 3, characterized in that: The synchronous lifting sling further includes a redundant adjustment component (400); The redundant adjustment assembly (400) includes a rotary reducer (410) and a servo motor (420), wherein the outer ring of the rotary reducer (410) is fixedly connected to the lifting drum mounting frame, and the inner ring of the rotary reducer (410) is fixedly connected to the outer housing of the planetary gear reducer (240); The servo motor (420) is fixedly connected to the hanger (100), and the output end of the servo motor (420) is connected to the input end of the rotary reducer (410).

7. The two-stage multi-point synchronous lifting sling according to claim 6, characterized in that: The synchronous lifting sling further includes a brake assembly (500); The brake assembly (500) comprises a brake wheel (510) and a clamping assembly (520), wherein the brake wheel (510) is fixedly connected to the transmission rod, and the clamping assembly (520) is fixedly connected to the hanger (100), and the clamping assembly (520) is cooperatively arranged on the brake wheel (510), and the clamping assembly (520) selectively clamps the brake wheel (510) to brake the transmission rod.

8. The two-stage multi-point synchronous lifting spreader according to any one of claims 1 to 7, characterized in that: The synchronous lifting sling further comprises a lifting ring (700) and a plurality of lifting straps (800), one end of each lifting strap (800) is connected to the lifting ring (700), and the other end of each lifting strap (800) is connected to the hanging bracket (100).

9. The two-stage multi-point synchronous lifting spreader according to claim 2, characterized in that: The driving motor (210) is configured as a variable frequency motor, and the variable frequency motor selectively adjusts the lifting speed.

10. The two-stage multi-point synchronous lifting spreader according to claim 7, characterized in that: When the driving motor (210) fails, the brake assembly (500) brakes, the servo motor (420) drives the inner ring of the rotary reducer (410) to rotate, the inner ring of the rotary reducer (410) drives the outer shell of the planetary gear reducer (240) to rotate, and the output shaft of the planetary gear reducer (240) rotates, further driving the lifting drum (310), completing synchronous lifting and realizing a redundant power lifting function.

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