Rotary cargo carrying table structure of elevator and control method of rotary cargo carrying table structure

Abstract

The rotary cargo carrying table structure of the elevator comprises a rotary cargo carrying unit, the rotary cargo carrying unit comprises a cargo carrying table base and a cargo carrying table plate which is arranged above the cargo carrying table base and rotationally connected with the cargo carrying table base through a rotary supporting shaft, and cargo carrying extension arms used for inserting and taking cargoes are symmetrically arranged at the front end of the cargo carrying table plate; the dynamic counterweight balance unit comprises a rectangular frame rotationally arranged at the tail end of the cargo carrying platen and a plurality of balance blocks sliding in the rectangular frame, and the balance blocks are used for balancing overturning force generated by the cargo carrying extension arm to the rotary supporting shaft when the cargo carrying extension arm inserts or feeds the cargoes; and the extension traction unit is used for controlling the rectangular frame to rotate. According to the invention, the overturning force generated at the moment of goods insertion and taking or loading of the goods carrying table can be quickly balanced by quickly moving the balance block within a short time, and the dynamic balance of each working state of the goods carrying table is realized.

Description

Technical Field

[0001] This invention relates to the field of cargo platform technology, and in particular to a rotating cargo platform structure for a hoist and its control method. Background Technology

[0002] In recent years, with the rapid development of logistics, warehousing, and manufacturing, hoists, as an important material handling equipment, have been widely used in scenarios involving the lifting, transfer, and storage of goods. Traditional hoists are typically equipped with a rotating platform structure to achieve flexible turning and positioning of goods, improving operational efficiency. This structure generally includes a platform base, a rotating support shaft, and a platform plate, and uses extended arms or forks to pick up and place goods. In practical applications, the rotating platform of the hoist needs to cope with various weights and uneven distributions of goods to ensure the stability and safety of the equipment during the lifting process. In existing technologies, some hoists have introduced counterweight mechanisms, such as sliding counterweights driven by motors or cylinders, to attempt to adjust the counterweight position according to the fork extension distance, thereby balancing the overturning force generated by the goods on the rotating support shaft. However, these designs mainly rely on linear movement adjustment and cannot cope with rapid load changes.

[0003] However, existing rotating loading platform structures for hoists have significant drawbacks when handling dynamic loads. Specifically, during the rapid dynamic process of forks picking up or loading goods, when a fully loaded fork is pulled out of the rack or an empty fork extends towards the rack to lift it up, the overturning torque acting on the loading platform undergoes a sudden, abrupt change in a short period. Existing technologies using counterweight movement mechanisms driven solely by motors or cylinders have a long response time and exhibit significant lag. This makes it impossible to synchronously adjust the position of the counterweights as the fork retraction distance changes, making it difficult to balance the overturning force in real time. Ultimately, this can easily lead to equipment tilting, deformation of the rotating support shaft, or eccentricity, affecting operational safety and efficiency. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the rotating cargo platform structure and its control method of the above-mentioned hoist, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a rotating loading platform structure for a hoist and its control method, which is applicable to solving the problem in the prior art that the position of the balance block cannot be adjusted synchronously with the change of the fork retraction distance, making it difficult to balance the overturning force in real time, and ultimately easily causing equipment tilting, deformation of the rotating support shaft or eccentricity.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a rotating cargo platform structure for a hoist, comprising: A rotating cargo unit includes a cargo platform and a cargo table plate disposed above the cargo platform and rotatably connected to the cargo platform via a rotating support shaft. Cargo extension arms for inserting and picking up goods are symmetrically arranged at the front end of the cargo table plate. A dynamic counterweight balancing unit includes a rectangular frame rotatably disposed at the end of a loading platform and multiple counterweights sliding within the rectangular frame. The multiple counterweights are used to balance the overturning force generated on the rotating support shaft by the loading arm inserting or loading goods. Extend the traction unit, which is used to control the rotation of the rectangular frame.

[0008] As a preferred embodiment of the rotating cargo platform structure of the hoist described in this invention, the rectangular frame is rotatably connected to the cargo platform plate on both sides by corresponding rotating gears. Symmetrically positioned sliding rods are fixedly installed inside the rectangular frame. Each balance block is slidably mounted on its corresponding sliding rod. A threaded rod is rotatably connected to the center of the rectangular frame, and a first drive source for driving the threaded rod to rotate is fixedly installed at one end of the rectangular frame. A push plate is threadedly connected to the threaded rod, and the push plate is slidably connected to multiple sliding rods. An elastic power-on switch corresponding to the balance block is embedded in the push plate. An elastic power-off switch electrically connected to the first drive source is installed at one end of the rectangular frame, and an elastic power-off switch electrically connected to the first drive source is fixedly installed at the other end of the rectangular frame. The elastic power-off switch is electrically connected to the first drive source. The dynamic counterweight balancing unit further includes a rotation drive component for controlling the rotation angle and direction of the rectangular frame, and a frame positioning sub-component for positioning the rotation of the rectangular frame.

[0009] As a preferred embodiment of the rotating cargo platform structure of the hoist described in this invention, the rotating drive assembly includes a rotating drive frame slidably disposed between the cargo platform and the rectangular frame and matched with the rotating gear column, and an array of teeth disposed on the inner walls of the upper and lower sides of the rotating drive frame. The rotating drive frame includes an upper gear plate and a lower gear plate, and a pull plate fixedly connected to the front end of the upper gear plate and the lower gear plate. The lower side wall of the upper gear plate is fixedly provided with a continuous second tooth and a third tooth, and the lower inner side wall of the lower gear plate is fixedly provided with a first tooth and a fourth tooth that are offset from the second tooth and the second tooth.

[0010] As a preferred embodiment of the rotating cargo platform structure of the hoist described in this invention, the frame positioning sub-assembly includes multiple bent portions fixedly disposed on the upper and lower side walls of the cargo platform, each bent portion is fixedly disposed with an electric push rod corresponding to the upper and lower sides of the rotating drive frame, the cargo compression switch and the elastic power-off switch are electrically connected to the electric push rod, and the upper and lower sides of the rotating drive frame are provided with positioning grooves corresponding to the electric push rod.

[0011] As a preferred embodiment of the rotating cargo platform structure of the hoist described in this invention, the extension traction unit includes a mounting shell fixedly disposed on the upper middle part of the cargo platform and a dual-axis output motor disposed through the mounting shell. The elastic power-off switch is electrically connected to the dual-axis output motor. The output shafts of the dual-axis output motor are all fixedly connected to rotating boxes. Each rotating box has a first winding roller and a second winding roller respectively disposed on one side. A first traction rope is fixedly connected to the end wall of the rotating drive frame, and the other end of the traction rope is wound around the first winding roller. A second traction rope is fixedly connected to the front end of the cargo extension arm, and the other end of the second traction rope is wound around the second winding roller. A first spur gear is fixedly disposed at the end of the first winding roller and the second winding roller away from the rotating box. The two first spur gears are meshed. The extension traction unit also includes a meshing adjustment component for adjusting the meshing of the two first spur gears.

[0012] As a preferred embodiment of the rotating loading platform structure of the hoist described in this invention, the engagement adjustment assembly includes a bidirectional lead screw rotatably connected inside a rotating box and a second drive source fixedly disposed on the end wall of the rotating box for driving the bidirectional lead screw to rotate. The bidirectional lead screw is threaded with symmetrically positioned threaded sleeves, each of which is fixedly connected with a connecting post. The side wall of the rotating box has a strip-shaped opening that matches the connecting post. One of the connecting posts is rotatably connected to a second winding roller. The engagement adjustment assembly also includes a unidirectional rotation sub-assembly for controlling the unidirectional rotation of the first winding roller.

[0013] As a preferred embodiment of the rotating cargo platform structure of the hoist described in this invention, wherein: one of the connecting columns is fixedly connected to a fixed disk, the second winding roller is rotatably connected to the fixed disk via a rotating rod, a second spur gear is fixedly sleeved on the rotating rod, a third drive source is fixedly installed on the fixed disk, the elastic stop switch is electrically connected to the third drive source, a second spur gear is also fixedly sleeved on the output shaft of the third drive source, and the two second spur gears mesh with each other.

[0014] As a preferred embodiment of the rotating cargo platform structure of the hoist described in this invention, the unidirectional rotating sub-assembly includes a hollow shell fixedly mounted on another connecting column and a transmission rod rotatably connected to the inner end wall of the hollow shell. The end of the transmission rod away from the connecting column extends outward through the side wall of the hollow shell and is fixedly connected to the first winding roller. A ratchet is fixedly sleeved on the transmission rod, and a pawl matching the ratchet is provided inside the hollow shell.

[0015] In a preferred embodiment of the rotating cargo platform structure of the hoist described in this invention, the first traction rope and the second traction rope are staggered in position, and the radial cross-sections of both the first traction rope and the second traction rope are set to be elliptical.

[0016] A method for controlling a rotating cargo platform structure of a hoist, the method comprising: S1: When it is necessary to insert and transfer goods, the rotating support shaft drives the loading platform to adjust to align with the goods, and the loading extension arm extends. At this time, the loading extension arm drives the rotating drive frame to move through the first traction rope and the second traction rope, thereby driving the rectangular frame to rotate 90° clockwise first and then 90° counterclockwise to reset. At this time, the balance block moves to the end of the rectangular frame away from the middle of the loading platform. S2: After the cargo extension arm completes the cargo insertion and removal, the cargo compression switch on the cargo extension arm will control the electric push rod to extend, jamming the rotary drive frame so that it stops moving. Then, it controls the second drive source to drive the two first spur gears away, and starts the third drive source to drive the second winding roller to take in the wire. At the same time, the compressed elastic energized switch drives the magnetic push plate to push the balance block towards the center of the cargo platform, dynamically balancing the overturning force of the cargo extension arm and the cargo on the rotary support shaft. When the elastic stop switch is squeezed by the push plate, it will control the first drive source and the third drive source to shut down. S3: When loading, the loading arm extends, the third drive source drives the second winding roller to reverse and feed the wire, and the magnetic push plate drives the balance block to move away from the center of the loading platform, dynamically balancing the overturning force of the loading arm and the goods on the rotating support shaft. When the loading arm completes loading, the loading squeeze switch is closed, the elastic power-off switch is squeezed by the push plate, and its control push plate is no longer magnetic and controls the first drive source to reset to the initial state, and controls the electric push rod to retract and shut down the third drive source, and controls the two first spur gears to mesh through the second drive source; S4: When the loading arm is fully loaded and then resets to its unloaded state, the flexible power-off switch controls the dual-axis output motor to drive the first and second winding rollers to rotate. At the same time, the first and second traction ropes are wound up, and the rotating drive frame continues to move forward, causing the rectangular frame to rotate 90° counterclockwise and then 90° clockwise. This completes the rapid movement of the balance block to one end near the loading platform, achieving dynamic balance of the unloaded forks at the moment of loading.

[0017] The beneficial effects of this invention are as follows: When it is necessary to insert and transfer goods, after the rotating support shaft drives the loading platform to be aligned with the goods, the loading extension arm extends, and the rotating drive frame moves towards the center of the loading platform. While the loading extension arm inserts the goods and bears the instantaneous overturning force, the balance block can be moved to the other end of the rectangular frame in a short time, thereby quickly achieving dynamic balance of the instantaneous overturning force of the loading extension arm inserting the goods. After the loading extension arm completes the insertion of the goods, the loading squeeze switch controls the electric push rod to extend and lock the rotating drive frame so that it no longer moves. At the same time, the squeezed elastic energized switch drives the magnetic push plate to push the balance block towards the center of the loading platform, dynamically balancing the overturning force of the loading extension arm and the goods on the rotating support shaft. When loading, the loading arm extends, and the third drive source drives the second winding roller to reverse and release the wire. The magnetic push plate drives the balance block to move away from the center of the loading platform, dynamically balancing the overturning force of the loading arm and the goods on the rotating support shaft. When the loading arm returns to its empty position after loading, the flexible power-off switch controls the dual-axis output motor to drive the first and second winding rollers to rotate. At the same time, the two rollers simultaneously retract the first and second traction ropes. The rotating drive frame continues to move forward, causing the rectangular frame to rotate 90° counterclockwise and then 90° clockwise, completing the rapid movement of the balance block to one end closer to the loading platform, achieving dynamic balancing of the empty forks at the moment of loading. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the rotating cargo platform structure of the hoist proposed in this invention; Figure 2 This is a schematic diagram of the loading platform structure of a rotating loading platform structure for a hoist proposed in this invention. Figure 3 This is a schematic diagram of the dynamic counterweight balancing unit structure of the rotating cargo platform structure of the hoist proposed in this invention; Figure 4 This is a schematic diagram of the push plate, elastic power switch and balance block of the rotating cargo platform structure of the hoist proposed in this invention; Figure 5 This is a front view schematic diagram of the rotary drive assembly of a rotating cargo platform structure for a hoist proposed in this invention; Figure 6This is a schematic diagram of the extended traction unit structure of the rotating cargo platform structure of a hoist proposed in this invention; Figure 7 This is a schematic diagram of the meshing adjustment component structure of the rotating cargo platform structure of a hoist proposed in this invention; Figure 8 This is a schematic diagram of a unidirectional rotating sub-assembly structure of a rotating cargo platform structure for a hoist proposed in this invention.

[0019] Figure Descriptions: 100 Rotary Cargo Loading Unit, 101 Cargo Loading Platform, 102 Rotary Support Shaft, 103 Cargo Loading Platform, 104 Cargo Extension Arm, 200 Dynamic Counterweight Balancing Unit, 201 Rotary Gear Column, 202 Rectangular Frame, 203 Slide Rod, 204 Balance Block, 205 First Drive Source, 206 Threaded Rod, 207 Push Plate, 208 Flexible Stop Switch, 209 Flexible Power-Off Switch, 210 Flexible Power-On Switch, 211 Rotary Drive Assembly, 211a Rotary Drive Frame, 211a-1 Pull Plate, 211a-2 Upper Gear Plate, 211a-3 Lower Gear Plate, 211b Array Gears, 211b-1 First Gear, 211b-2 Second Gear, 211b-3 Third Gear, 211b-4 Fourth Gear, 211c Frame positioning sub-assembly, 211c-1 bending part, 211c-2 electric push rod, 212 cargo compression switch, 300 extension traction unit, 301 dual-axis output motor, 302 mounting shell, 303 rotating box, 304 first winding roller, 305 second winding roller, 306 first traction rope, 307 second traction rope, 308 first spur gear, 309 meshing adjustment assembly, 309a bidirectional lead screw, 309b second drive source, 309c threaded sleeve, 309d connecting column, 309e unidirectional rotation sub-assembly, 309e-1 hollow shell, 309e-2 transmission rod, 309e-3 ratchet, 309e-4 pawl, 309f fixed plate, 309g rotating rod, 309h third drive source, 309i second spur gear. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0024] Example 1 Reference Figures 1-5 According to one embodiment of the present invention, a rotating cargo platform structure for a hoist is provided, comprising: a rotating cargo loading unit 100, a dynamic counterweight balancing unit 200, and an extension traction unit 300.

[0025] Existing rotating loading platform structures for hoists have significant drawbacks when handling dynamic loads. Specifically, during the rapid dynamic process of forks picking up or loading goods, when a fully loaded fork is pulled out of the rack or an empty fork extends towards the rack to lift it up, the overturning torque acting on the loading platform undergoes a sudden, abrupt change within a short period. Existing technologies that rely solely on motors or cylinders to drive the balance block movement mechanism have a long response time and exhibit significant lag. This prevents the balance block position from adjusting synchronously with changes in the fork retraction distance, making it difficult to balance the overturning force in real time. Ultimately, this can easily lead to equipment tilting, deformation of the rotating support shaft, or eccentricity, affecting operational safety and efficiency.

[0026] like Figure 1 As shown, the rotating cargo unit 100 includes a cargo platform 101 and a cargo platform 103 disposed above the cargo platform 101 and rotatably connected to the cargo platform 101 via a rotating support shaft 102. The cargo platform 103 has symmetrically arranged cargo extension arms 104 for inserting and picking up goods at its front end. It should be noted that the cargo platform structure also includes a drive source for driving the cargo platform 101 and the rotating support shaft 102 to rotate and a controller for controlling the extension and retraction of the cargo extension arms 104. These components are all inherent components of the rotating cargo platform and belong to very mature existing technology. Therefore, the working principle and specific model of the above structure and components will not be described in detail in this invention. Secondly, the dynamic counterweight balancing unit 200 includes a rectangular frame 202 rotatably disposed at the end of the loading platform 103 and a plurality of balancing blocks 204 sliding within the rectangular frame 202. The plurality of balancing blocks 204 are used to balance the overturning force generated by the loading arm 104 inserting or loading goods on the rotating support shaft 102. Furthermore, such as Figure 3 As shown, both sides of the rectangular frame 202 are rotatably connected to the loading platform 103 via corresponding rotating gears 201. Symmetrically positioned sliding rods 203 are fixedly installed inside the rectangular frame 202. Each balance block 204 is slidably fitted onto its corresponding sliding rod 203. A threaded rod 206 is rotatably connected to the center of the rectangular frame 202, and a first drive source 205 for driving the threaded rod 206 to rotate is fixedly installed at one end of the rectangular frame 202. A push plate 207 is threadedly connected to the threaded rod 206, and the push plate 207 is slidably connected to multiple sliding rods 203. Furthermore, the push plate 207 is inlaid with... There is an elastic power switch 210 corresponding to the balance block 204. One end of the rectangular frame 202 is provided with an elastic stop switch 208 electrically connected to the first drive source 205, and the other end of the rectangular frame 202 is fixedly provided with an elastic power cut switch 209 electrically connected to the first drive source 205. The elastic power cut switch 209 is electrically connected to the first drive source 205. The dynamic counterweight balancing unit 200 also includes a rotation drive component 211 for controlling the rotation angle and direction of the rectangular frame 202 and a frame positioning sub-component 211c for positioning the rotation of the rectangular frame 202. It should be noted that the balance block 204 is made of ferromagnetic material, such as iron, nickel, cobalt or their alloys such as carbon steel or silicon steel, to ensure that it can be attracted by electromagnets and achieve reliable adsorption and separation.

[0027] Furthermore, such as Figure 5 As shown, the rotary drive assembly 211 includes a rotary drive frame 211a slidably disposed between the loading platform 103 and the rectangular frame 202 and matched with the rotary gear column 201, and an array of teeth 211b disposed on the inner walls of the upper and lower sides of the rotary drive frame 211a. The rotary drive frame 211a includes an upper toothed plate 211a-2 and a lower toothed plate 211a-3, and a pull plate 211a-1 fixedly connected to the front ends of the upper toothed plate 211a-2 and the lower toothed plate 211a-3. The lower side wall of the upper toothed plate 211a-2 is fixedly provided with a continuous second tooth 211b-2 and a third tooth 211b-3. The lower inner wall of the lower toothed plate 211a-3 is fixedly provided with a first tooth 211b-1 and a fourth tooth 211b-4 that are offset from the second tooth 211b-2 and the second tooth 211b-2.

[0028] Combination Figure 2It is understood that the frame positioning sub-assembly 211c includes multiple bent portions 211c-1 fixedly installed on the upper and lower side walls of the loading platform 103. Each bent portion 211c-1 is fixedly provided with an electric push rod 211c-2 corresponding to the upper and lower sides of the rotary drive frame 211a. The loading compression switch 212 and the elastic power-off switch 209 are both electrically connected to the electric push rod 211c-2, and the upper and lower sides of the rotary drive frame 211a are provided with positioning grooves corresponding to the electric push rod 211c-2.

[0029] Secondly, the extended traction unit 300 is used to control the rotation of the rectangular frame 202.

[0030] During use, when goods need to be inserted or transferred, the rotating support shaft 102 drives the loading platform 103 to be aligned with the goods, and then the loading extension arm 104 extends. The rotating drive frame 211a moves toward the center of the loading platform. The first tooth 211b-1 on the lower toothed plate 211a-3, while meshing with the rotating toothed column 201, drives the rectangular frame 202 to rotate 90° clockwise. At this time, the rectangular frame 202 is in a vertical state. The balance block 204, which is sleeved on the slide bar 203, quickly falls to the other end of the rectangular frame 202 due to its own weight. As the rotating drive... As the moving frame 211a continues to move forward, the second tooth 211b-2 set on the upper toothed plate 211a-2 engages with the rotating toothed column 201, causing the rectangular frame 202 to rotate 90° counterclockwise to return to the initial horizontal state. The balance block 204 quickly moves to one end of the rectangular frame 202 away from the middle of the loading platform 103. While the loading extension arm 104 is inserting goods and bearing the instantaneous overturning force, the balance block 204 can be moved to the other end of the rectangular frame 202 in a short time, thereby quickly achieving dynamic balance for the loading extension arm 104 to insert goods and bear the instantaneous overturning force. After the cargo extension arm 104 completes the loading and unloading of goods, the cargo compression switch 212 on the cargo extension arm 104 is compressed by the cargo pallet, which controls the electric push rod 211c-2 to extend and lock the rotary drive frame 211a so that it stops moving. At the same time, the compressed elastic energized switch 210 drives the magnetic push plate 207 to push the balance block 204 toward the middle of the cargo platform 103, dynamically balancing the overturning force of the cargo extension arm 104 and the cargo on the rotary support shaft 102. When the elastic stop switch 208 is compressed by the push plate 207, it controls the first drive source 205 and the third drive source 309h to shut down. S3: When loading, the loading arm 104 extends, the third drive source 309h drives the second winding roller 305 to reverse and feed the wire, and the magnetic push plate 207 drives the balance block 204 to move away from the center of the loading platform 103, dynamically balancing the overturning force of the loading arm 104 and the goods on the rotating support shaft 102. When the loading arm 104 completes loading, the loading squeeze switch 212 closes, the elastic power-off switch 209 is squeezed by the push plate 207, which controls the push plate 207 to no longer be magnetic and controls the first drive source 205 to reset to the initial state, and controls the electric push rod 211c-2 to retract and shut down the third drive source 309h, and controls the two first spur gears 308 to mesh through the second drive source 309b. S4: When the loading arm 104 returns to its unloaded state after loading, the flexible power-off switch 209 controls the dual-axis output motor 301 to drive the first winding roller 304 and the second winding roller 305 to rotate. At the same time, the two rollers take in the first traction rope 306 and the second traction rope 307. The rotating drive frame 211a continues to move forward, causing the rectangular frame 202 to rotate 90° counterclockwise and then 90° clockwise. This completes the rapid movement of the balance block 204 to one end near the loading platform, achieving dynamic balance of the unloaded forks at the moment of loading.

[0031] Example 2 Reference Figure 6-8 The difference from Embodiment 1 is that the extended traction unit 300 includes a mounting shell 302 fixedly disposed in the middle of the upper side of the loading platform 103 and a dual-axis output motor 301 disposed through the mounting shell 302. An elastic power-off switch 209 is electrically connected to the dual-axis output motor 301. The output shafts of the dual-axis output motor 301 are all fixedly connected to rotating boxes 303. Each rotating box 303 has a first winding roller 304 and a second winding roller 305 respectively disposed on one side. The end wall of the rotary drive frame 211a is fixedly connected to a first... A traction rope 306 is provided, with the other end of the traction rope wound around the first winding roller 304. A second traction rope 307 is fixedly connected to the front end of the cargo extension arm 104, with the other end of the second traction rope 307 wound around the second winding roller 305. A first spur gear 308 is fixedly provided at the ends of the first winding roller 304 and the second winding roller 305 away from the rotating box 303. The two first spur gears 308 are meshed. The extension traction unit 300 also includes a meshing adjustment component 309 for adjusting the meshing of the two first spur gears 308.

[0032] Furthermore, such as Figure 7As shown, the engagement adjustment assembly 309 includes a bidirectional lead screw 309a rotatably connected within the rotating box 303 and a second drive source 309b fixedly disposed on the end wall of the rotating box 303 for driving the bidirectional lead screw 309a to rotate. The bidirectional lead screw 309a is threadedly connected with symmetrically positioned threaded sleeves 309c. Each threaded sleeve 309c is fixedly connected with a connecting post 309d, and the side wall of the rotating box 303 has a strip-shaped opening that matches the connecting post 309d. One of the connecting posts 309d is rotatably connected to the second winding roller 305. The engagement adjustment assembly 309 also includes a unidirectional rotation sub-assembly 309e for controlling the unidirectional rotation of the first winding roller 304.

[0033] Reference Figure 7 One of the connecting columns 309d is fixedly connected to a fixed disk 309f. The second winding roller 305 is rotatably connected to the fixed disk 309f through a rotating rod 309g. A second spur gear 309i is fixedly sleeved on the rotating rod 309g. A third drive source 309h is fixedly installed on the fixed disk 309f. The elastic stop switch 208 is electrically connected to the third drive source 309h. A second spur gear 309i is also fixedly sleeved on the output shaft of the third drive source 309h. The two second spur gears 309i mesh with each other.

[0034] Furthermore, such as Figure 8 As shown, the unidirectional rotating sub-assembly 309e includes a hollow shell 309e-1 fixedly mounted on another connecting post 309d and a transmission rod 309e-2 rotatably connected to the inner end wall of the hollow shell 309e-1. The end of the transmission rod 309e-2 away from the connecting post 309d extends outward through the side wall of the hollow shell 309e-1 and is fixedly connected to the first winding roller 304. A ratchet 309e-3 is fixedly sleeved on the transmission rod 309e-2, and a pawl 309e-4 matching the ratchet 309e-3 is provided inside the hollow shell 309e-1.

[0035] The first traction rope 306 and the second traction rope 307 are staggered, and the radial cross sections of the first traction rope 306 and the second traction rope 307 are both set to be elliptical. The staggered arrangement of the first traction rope 306 and the second traction rope 307 can ensure that the two traction ropes will not intertwine when the two winding rollers tighten the two traction ropes at the same time.

[0036] A method for controlling the rotating loading platform structure of a hoist, the method comprising: S1: When it is necessary to insert and transfer goods, the rotating support shaft 102 drives the loading platform 103 to be adjusted to align with the goods, and the loading extension arm 104 extends. At this time, the loading extension arm 104 drives the rotating drive frame 211a to move through the first traction rope 306 and the second traction rope 307, which in turn drives the rectangular frame 202 to rotate 90° clockwise first and then 90° counterclockwise to reset. At this time, the balance block 204 moves to the end of the rectangular frame 202 away from the middle of the loading platform 103. S2: After the cargo extension arm 104 completes the loading and unloading of goods, the cargo compression switch 212 on the cargo extension arm 104 will control the electric push rod 211c-2 to extend, jamming the rotary drive frame 211a so that it stops moving. Then, it controls the second drive source 309b to drive the two first spur gears 308 away, and starts the third drive source 309h to drive the second winding roller 305 to take in the wire. At the same time, the squeezed elastic energized switch 210 drives the magnetic push plate 207 to push the balance block 204 towards the middle of the cargo platform 103, dynamically balancing the overturning force of the cargo extension arm 104 and the goods on the rotary support shaft 102. When the elastic stop switch 208 is squeezed by the push plate 207, it will control the first drive source 205 and the third drive source 309h to close. S3: When loading, the loading arm 104 extends, the third drive source 309h drives the second winding roller 305 to reverse and feed the wire, and the magnetic push plate 207 drives the balance block 204 to move away from the center of the loading platform 103, dynamically balancing the overturning force of the loading arm 104 and the goods on the rotating support shaft 102. When the loading arm 104 completes loading, the loading squeeze switch 212 closes, the elastic power-off switch 209 is squeezed by the push plate 207, which controls the push plate 207 to no longer be magnetic and controls the first drive source 205 to reset to the initial state, and controls the electric push rod 211c-2 to retract and shut down the third drive source 309h, and controls the two first spur gears 308 to mesh through the second drive source 309b. S4: When the loading arm 104 returns to its unloaded state after loading, the flexible power-off switch 209 controls the dual-axis output motor 301 to drive the first winding roller 304 and the second winding roller 305 to rotate. At the same time, the two rollers take in the first traction rope 306 and the second traction rope 307. The rotating drive frame 211a continues to move forward, causing the rectangular frame 202 to rotate 90° counterclockwise and then 90° clockwise. This completes the rapid movement of the balance block 204 to one end near the loading platform, achieving dynamic balance of the unloaded forks at the moment of loading.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A rotating cargo platform structure for a hoist, characterized in that, include: The rotating cargo unit (100) includes a cargo platform (101) and a cargo platform (103) disposed above the cargo platform (101) and rotatably connected to the cargo platform (101) via a rotating support shaft (102). The cargo platform (103) has a cargo extension arm (104) symmetrically arranged at the front end for inserting and picking up goods. The dynamic counterweight balancing unit (200) includes a rectangular frame (202) rotatably disposed at the end of the loading platform (103) and a plurality of balancing blocks (204) sliding within the rectangular frame (202), the plurality of balancing blocks (204) being used to balance the overturning force generated by the loading arm (104) inserting or loading goods on the rotating support shaft (102); Extend the traction unit (300), which is used to control the rotation of the rectangular frame (202).

2. The rotating cargo platform structure of a hoist according to claim 1, characterized in that: The rectangular frame (202) is rotatably connected to the loading platform (103) on both sides via corresponding rotating gears (201). Symmetrically positioned sliding rods (203) are fixedly installed inside the rectangular frame (202). Each balance block (204) is slidably mounted on its corresponding sliding rod (203). A threaded rod (206) is rotatably connected to the center of the rectangular frame (202), and a first driving source (205) for driving the threaded rod (206) to rotate is fixedly installed at one end of the rectangular frame (202). A push plate (207) is threadedly connected to the threaded rod (206), and the push plate (207) is slidably connected to multiple sliding rods (203). The push plate (207) is inlaid with... The rectangular frame (202) is equipped with an elastic power-on switch (210) corresponding to the balance block (204). One end of the rectangular frame (202) is provided with an elastic power-off switch (208) electrically connected to the first drive source (205), and the other end of the rectangular frame (202) is fixedly provided with an elastic power-off switch (209) electrically connected to the first drive source (205). The elastic power-off switch (209) is electrically connected to the first drive source (205). The dynamic counterweight balancing unit (200) also includes a rotation drive component (211) for controlling the rotation angle and direction of the rectangular frame (202) and a frame positioning sub-component (211c) for positioning the rotation of the rectangular frame (202).

3. The rotating cargo platform structure of a hoist according to claim 2, characterized in that: The rotary drive assembly (211) includes a rotary drive frame (211a) slidably disposed between the loading platform (103) and the rectangular frame (202) and matched with the rotary gear column (201), and an array of teeth (211b) disposed on the inner walls of the upper and lower sides of the rotary drive frame (211a). The rotary drive frame (211a) includes an upper toothed plate (211a-2) and a lower toothed plate (211a-3), and an array of teeth (211b) disposed on the inner walls of the upper and lower sides of the rotary drive frame (211a). A pull plate (211a-1) is fixedly connected to the front end of the lower toothed plate (211a-3). The lower side wall of the upper toothed plate (211a-2) is fixedly provided with a continuous second tooth (211b-2) and a third tooth (211b-3). The lower inner wall of the lower toothed plate (211a-3) is fixedly provided with a first tooth (211b-1) and a fourth tooth (211b-4) that are offset from the second tooth (211b-2) and the second tooth (211b-2).

4. The rotating cargo platform structure of a hoist according to claim 2, characterized in that: The frame positioning sub-assembly (211c) includes multiple bent portions (211c-1) fixedly installed on the upper and lower side walls of the cargo platform (103). Each bent portion (211c-1) is fixedly provided with an electric push rod (211c-2) corresponding to the upper and lower sides of the rotary drive frame (211a). The cargo compression switch (212) and the elastic power-off switch (209) are both electrically connected to the electric push rod (211c-2). The upper and lower sides of the rotary drive frame (211a) are provided with positioning grooves corresponding to the electric push rod (211c-2).

5. The rotating cargo platform structure of a hoist according to claim 3, characterized in that: The extended traction unit (300) includes a mounting shell (302) fixedly disposed in the middle of the upper side of the loading platform (103) and a dual-axis output motor (301) disposed through the mounting shell (302). The elastic power-off switch (209) is electrically connected to the dual-axis output motor (301). The output shafts of the dual-axis output motor (301) are all fixedly connected to rotating boxes (303). Each rotating box (303) has a first winding roller (304) and a second winding roller (305) respectively disposed on one side. A first traction rope (306) is fixedly connected to the end wall of the rotating drive frame (211a). The other end of the traction rope is wound around the first winding roller (304), and the front end of the cargo extension arm (104) is fixedly connected to the second traction rope (307). The other end of the second traction rope (307) is wound around the second winding roller (305). The ends of the first winding roller (304) and the second winding roller (305) away from the rotating box (303) are both fixedly provided with a first spur gear (308). The two first spur gears (308) are meshed. The extension traction unit (300) also includes a meshing adjustment component (309) for adjusting the meshing of the two first spur gears (308).

6. The rotating cargo platform structure of a hoist according to claim 5, characterized in that: The engagement adjustment assembly (309) includes a bidirectional lead screw (309a) rotatably connected in a rotating box (303) and a second drive source (309b) fixedly disposed on the end wall of the rotating box (303) for driving the bidirectional lead screw (309a) to rotate. The bidirectional lead screw (309a) is threaded with symmetrically positioned threaded sleeves (309c). Each threaded sleeve (309c) is fixedly connected with a connecting post (309d). The side wall of the rotating box (303) is provided with a strip-shaped opening that matches the connecting post (309d). One of the connecting posts (309d) is rotatably connected to the second winding roller (305). The engagement adjustment assembly (309) also includes a unidirectional rotation sub-assembly (309e) for controlling the unidirectional rotation of the first winding roller (304).

7. The rotating cargo platform structure of a hoist according to claim 6, characterized in that: One of the connecting columns (309d) is fixedly connected to a fixed disk (309f). The second winding roller (305) is rotatably connected to the fixed disk (309f) through a rotating rod (309g). A second spur gear (309i) is fixedly sleeved on the rotating rod (309g). A third drive source (309h) is fixedly installed on the fixed disk (309f). The elastic stop switch (208) is electrically connected to the third drive source (309h). A second spur gear (309i) is also fixedly sleeved on the output shaft of the third drive source (309h). The two second spur gears (309i) mesh with each other.

8. The rotating cargo platform structure of a hoist according to claim 6, characterized in that: The unidirectional rotating sub-assembly (309e) includes a hollow shell (309e-1) fixedly mounted on another connecting post (309d) and a transmission rod (309e-2) rotatably connected to the inner end wall of the hollow shell (309e-1). The end of the transmission rod (309e-2) away from the connecting post (309d) extends outward through the side wall of the hollow shell (309e-1) and is fixedly connected to the first winding roller (304). A ratchet (309e-3) is fixedly sleeved on the transmission rod (309e-2). A pawl (309e-4) matching the ratchet (309e-3) is provided inside the hollow shell (309e-1).

9. The rotating cargo platform structure of a hoist according to claim 5, characterized in that: The first traction rope (306) and the second traction rope (307) are staggered in position, and the radial cross-sections of the first traction rope (306) and the second traction rope (307) are both set to be elliptical.

10. A method for controlling a rotating cargo platform structure of a hoist, characterized in that, The manipulation method includes: S1: When it is necessary to insert and transfer goods, the rotating support shaft (102) drives the loading platform (103) to adjust to align with the goods, and the loading extension arm (104) extends. At this time, the loading extension arm (104) drives the rotating drive frame (211a) to move through the first traction rope (306) and the second traction rope (307), thereby driving the rectangular frame (202) to rotate 90° clockwise first and then 90° counterclockwise to reset. At this time, the balance block (204) moves to one end of the rectangular frame (202) away from the middle of the loading platform (103). S2: After the cargo extension arm (104) completes the cargo insertion and removal, the cargo compression switch (212) on the cargo extension arm (104) will control the electric push rod (211c-2) to extend, jam the rotary drive frame (211a) so that it stops moving, and then control the second drive source (309b) to drive the two first spur gears (308) away, and start the third drive source (309h) to drive the second winding roller (305) to take in the wire. At the same time, the squeezed elastic energized switch (210) drives the magnetic push plate (207) to push the balance block (204) towards the center of the cargo platform (103) to dynamically balance the overturning force of the cargo extension arm (104) and the cargo on the rotary support shaft (102). When the elastic stop switch (208) is squeezed by the push plate (207), it will control the first drive source (205) and the third drive source (309h) to close. S3: When loading, the loading arm (104) extends, the third drive source (309h) drives the second winding roller (305) to reverse and release the wire, and the magnetic push plate (207) drives the balance block (204) to move away from the center of the loading platform (103) to dynamically balance the overturning force of the loading arm (104) and the goods on the rotating support shaft (102). When the loading arm (104) completes loading, the loading squeeze switch (212) closes, the elastic power-off switch (209) is squeezed by the push plate (207), and its control push plate (207) is no longer magnetic and controls the first drive source (205) to reset to the initial state, and controls the electric push rod (211c-2) to retract and shut down the third drive source (309h). The two first spur gears (308) are meshed through the second drive source (309b). S4: When the loading arm (104) returns to its empty state after loading, the flexible power-off switch (209) controls the dual-axis output motor (301) to drive the first winding roller (304) and the second winding roller (305) to rotate. At the same time, the two wind the first traction rope (306) and the second traction rope (307) to take in the wire. The rotating drive frame (211a) continues to move forward, driving the rectangular frame (202) to rotate 90° counterclockwise and then 90° clockwise. This completes the rapid movement of the balance block (204) to one end close to the loading platform, achieving dynamic balance of the empty forks at the moment of loading.

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