An external clamp type automatic sling

Abstract

The application discloses an outer clamp type automatic lifting appliance and belongs to the technical field of hoisting. The outer clamp type automatic lifting appliance comprises a hoisting support, a lifting appliance outer tube, a lifting appliance inner tube, a self-rotating tube, a lifting appliance disc, upper hook claws and lower hook claws. The hoisting support is connected with the lifting appliance outer tube. The self-rotating tube is sleeved on the upper middle part of the lifting appliance inner tube. The lifting appliance outer tube is sleeved on the self-rotating tube. The lifting appliance inner tube passes through the central through hole of the lifting appliance disc. The outer tube disc at the lower end of the lifting appliance outer tube is located above the lifting appliance disc. The upper hook claws are installed on the upper surface of the lifting appliance disc. The lower hook claws are installed on the lower part of the lifting appliance disc. The upper hook claws and the lower hook claws are connected. The circumferential inner wall of the lifting appliance outer tube is provided with a plurality of clamping blocks. The circumferential outer wall of the self-rotating tube is provided with a short groove, a long groove and a blocking groove. The clamping blocks can rotate the self-rotating tube in the process of being sequentially placed in the long groove, the blocking groove and the short groove. The automatic hoisting function is realized by pure mechanical components. The outer clamp type automatic lifting appliance is suitable for operation in remote, high-risk and other harsh environments.

Description

Technical Field

[0001] This invention belongs to the field of hoisting technology, specifically relating to a hoisting device, and more particularly to an external clamping automatic hoisting device. Background Technology

[0002] Non-automatic lifting devices typically use hooks, where slings are attached to the hooks and then secured to the object being lifted for transport. This type of lifting device requires manual operation before and after lifting to attach and detach the object. However, in certain special environments, such as those with nuclear radiation or high temperatures, this method is difficult to use. Therefore, an automated lifting device is needed that can operate automatically before and after lifting, allowing for remote, automated loading and unloading.

[0003] Traditional automatic lifting devices mostly use electromagnets, which control the presence or absence of magnetic force by controlling the on / off state of the electromagnet, thereby controlling the attraction and release of the object being lifted. This type of automatic lifting device has the advantages of remote control and convenient operation, but it has the following drawbacks: First, it can only lift metal objects and is not suitable for lifting non-metallic objects; second, it needs to be connected to a power source by wires, which means it cannot operate if the power supply fails, and in some special environments, the electrical components pose a certain risk, such as in flammable gas environments, where even a tiny spark could cause a fire.

[0004] There are also traditional automatic lifting devices that do not use electromagnets, but they generally use motor drives or other methods to lift and release the object. They also have the drawbacks of using electrical components, or they use remote transmission control, which presents problems such as difficulty in implementing the transmission device.

[0005] Therefore, if automated hoisting functions without the need for remote transmission can be achieved through purely mechanical components, the aforementioned problems can be solved. Summary of the Invention

[0006] The purpose of this invention is to provide an external clamp automatic lifting device that can achieve automated lifting without the use of electrical components or remote transmission in order to solve the above-mentioned problems.

[0007] The present invention achieves the above objectives through the following technical solutions:

[0008] An external clamping automatic lifting device includes a lifting bracket, an outer lifting device tube, an inner lifting device tube, a spinning tube, a lifting device disc, an upper hook, and a lower hook. The lower end of the lifting bracket is connected to the upper end of the vertical outer lifting device tube. The vertical spinning tube is fitted around the upper middle part of the vertical inner lifting device tube and can rotate freely but cannot move vertically relative to the inner lifting device tube. The outer lifting device tube is fitted around the spinning tube. The horizontal lifting device disc has a central through hole through which the inner lifting device tube passes. The lower end of the inner lifting device tube extends outwards. An inner tube disc is formed by protrusions, located below the lifting device disc and not passing through the central through-hole of the lifting device disc. An outer tube disc is formed by the lower end of the outer tube protruding outwards, located above the lifting device disc and not passing through its central through-hole. Multiple upper hooks, evenly distributed around the same circumference, are mounted on the lifting device disc via transverse upper pins. These upper pins surround the outer tube disc, and the suspended ends of the upper hooks are all located directly above the outer tube disc. Inside, multiple lower hooks are respectively mounted on the lower part of the lifting device disc via transverse lower pins and are located directly below a plurality of corresponding upper hooks. The upper and lower hooks are connected by multiple linkage devices, causing the suspended ends to rotate downwards synchronously. Multiple protruding blocks are evenly distributed along the circumferential direction on the inner circumferential wall of the outer tube of the lifting device. Multiple arc-shaped protrusions protruding outwards are evenly distributed along the circumferential direction on the upper part of the outer circumferential wall of the spin tube. The lower end of each arc-shaped protrusion... The device has a short, concave groove in the middle, and a long, vertical groove is formed between two adjacent arc-shaped protrusions. The lateral width of the long groove is greater than the lateral width of the locking block. The upper end of the short groove is located below the upper end of the long groove. The lower part of the outer circumferential wall of the spin tube has a protruding ring that protrudes outward in the circumferential direction. The upper end of the protruding ring has multiple lower protruding teeth evenly distributed along the circumferential direction. A stop groove is formed between two adjacent lower protruding teeth. The locking block can rotate the spin tube by being placed in the corresponding long groove, the stop groove, and the short groove in sequence. To ensure sufficient space for movement between the suspended end of the upper hook and the outer tube disc, multiple upper hooks are mounted on the lifting device disc via multiple hook seats. Multiple upper hooks are mounted on multiple hook seats via lateral upper pins. In addition, the lower end of the lifting bracket is preferably welded to the upper end of the outer tube of the lifting device.

[0009] Preferably, in order to better realize the linkage function between the card block and the spin tube, the upper and lower surfaces of the card block are both inclined planes and form an "eight" shape with each other. The part of the arc-shaped protrusion located on both sides of the corresponding short groove forms an upper protrusion tooth. The horizontally opposite sides of the upper protrusion tooth are respectively inclined planes and vertical planes. The horizontally opposite sides of the lower protrusion tooth are respectively inclined planes. The bottom of the long groove and the bottom of the short groove correspond to one of the inclined planes of a certain lower protrusion tooth. The top of the stop groove corresponds to the inclined plane of a certain upper protrusion tooth.

[0010] Preferably, in order to achieve the limiting function of the spin tube and facilitate processing and assembly, the upper end of the long groove extends to the upper end of the spin tube and opens, the upper end of the inner tube of the lifting device is provided with external thread and the limiting nut is fitted on the upper end of the inner tube of the lifting device, and the outer diameter of a section on the outer circumference of the inner tube of the lifting device, located above the inner tube disc and below the spin tube, increases and forms an annular step at the position of the change in outer diameter, and the upper and lower ends of the spin tube are respectively limited by the limiting nut and the annular step.

[0011] Preferably, in order to achieve the linkage function between the upper and lower hooks and maintain downward rotational stress, the linkage device includes a connecting rod and a tension spring. The upper end of the connecting rod is rotatably connected to the cantilever of the corresponding upper hook, the lower end of the connecting rod is rotatably connected to the cantilever of the corresponding lower hook, the upper end of the tension spring is connected to the upper part of the corresponding connecting rod, and the lower end of the tension spring is connected to the lifting device disc.

[0012] The beneficial effects of this invention are as follows:

[0013] This invention utilizes a design that integrates a lifting support, an outer lifting tube, an inner lifting tube, a self-rotating tube, a lifting disc, an upper hook, and a lower hook. During operation, the lifting support is moved up and down by the boom. This allows the lifting support to descend, opening the lower hook and placing it on the upper periphery of the object being lifted; the outer tube disc rotates upward, causing the upper and lower hooks to rotate and clamp the object from the outside; the object is lifted and transferred; the lifting support descends again, opening the lower hook; and the lifting support ascends again, causing the lower hook to detach from the object. All the loading and unloading operations before and after lifting are automatically completed by the lifting support, which in turn drives the automatic lifting device. This purely mechanical design achieves automated lifting without the need for electrical components or long-range transmission structures, avoiding electrical risks and facilitating implementation. It is suitable for long-distance, high-risk, and other harsh environments, reducing operational risks. Attached Figure Description

[0014] Figure 1 This is a perspective view of the external clamping automatic lifting device described in this invention, and the object being lifted is also shown in the view.

[0015] Figure 2 This is a half-sectional perspective view of the external clamping automatic lifting device described in this invention, and the object being lifted is also shown in the figure;

[0016] Figure 3 This is a half-sectional perspective view of the lifting bracket and the outer tube of the external clamping automatic lifting device described in this invention;

[0017] Figure 4 This is a perspective view of the spin tube of the external clamping automatic lifting device described in this invention;

[0018] Figure 5 This is one of the perspective views of the external clamp automatic lifting device described in this invention. The lifting bracket, the outer tube of the lifting device, and the inner tube of the lifting device are in perspective view.

[0019] Figure 6 This is the second perspective view of the application of the external clamping automatic lifting device described in this invention. The lifting bracket, the outer tube of the lifting device and the inner tube of the lifting device in the figure are in perspective.

[0020] Figure 7 This is the third perspective view of the application of the external clamp automatic lifting device described in this invention. The lifting bracket, the outer tube of the lifting device, and the inner tube of the lifting device in the figure are in perspective. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] like Figures 1-7As shown, the external clamping automatic lifting device of the present invention includes a lifting bracket 1, an outer lifting device tube 2, an inner lifting device tube 12, a spinning tube 14, a lifting device disc 4, an upper hook 5, and a lower hook 10. The lower end of the lifting bracket 1 is welded to the upper end of the vertical outer lifting device tube 2. The vertical spinning tube 14 is fitted around the upper middle part of the vertical inner lifting device tube 12 and can rotate freely but cannot move vertically relative to the inner lifting device tube 12. The outer lifting device tube 2 is fitted around the spinning tube 14. The horizontal lifting device disc 4 has a central through hole through which the inner lifting device tube 12 passes. The lower end of the inner lifting device tube 12 protrudes outward in a circumferential direction. An inner tube disc 19 is formed, located below the lifting device disc 4 and not passing through the central through hole of the lifting device disc 4. The lower end of the outer tube 2 of the lifting device protrudes outward to form an outer tube disc 3, located above the lifting device disc 4 and not passing through the central through hole of the lifting device disc 4. Multiple upper hooks 5, evenly distributed on the same circumference, are respectively mounted on multiple hook seats 7 via transverse upper pins 6. Multiple hook seats 7 are respectively mounted on the top of the lifting device disc 4. Multiple upper pins 6 surround the outer tube disc 3. The suspended ends of multiple upper hooks 5 are all located in the area directly above the outer tube disc 3. Multiple lower hooks 1 The upper and lower hooks 10 are respectively installed on the lower part of the lifting device disc 4 via horizontal lower pins 18 and are located directly below the corresponding upper hooks 5. The upper hooks 5 and the lower hooks 10 are connected by multiple linkage devices, which give the suspended ends a downward synchronous rotational stress. The inner circumferential wall of the outer tube 2 of the lifting device is evenly provided with multiple protruding locking blocks 20 along the circumferential direction. The upper part of the outer circumferential wall of the spin tube 14 is evenly provided with multiple arc-shaped protrusions 142 protruding outward in the circumferential direction. Each arc-shaped protrusion 142 has a short groove 143 with an upward concave shape at the middle of its lower end. Adjacent arc-shaped protrusions 142 have a groove 143 with an upward concave shape at the middle of its lower end. A vertical long groove 141 is formed between the protrusions 142. The horizontal width of the long groove 141 is greater than the horizontal width of the locking block 20. The upper end of the short groove 143 is located below the upper end of the long groove 141. The lower part of the outer circumference of the spin tube 14 is provided with a circular protrusion 147 that protrudes outward in the circumferential direction. The upper end of the protrusion 147 is provided with a plurality of upward protruding lower teeth 145 evenly arranged along the circumferential direction. A stop groove 146 is formed between two adjacent lower teeth 145. The locking block 20 can rotate the spin tube 14 during the process of being placed in the corresponding long groove 141, stop groove 146 and short groove 143 in sequence.

[0023] like Figures 1-7 As shown, the present invention also discloses the following more optimized specific structures:

[0024] To better realize the linkage function between the locking block 20 and the spin tube 14, the upper and lower surfaces of the locking block 20 are both inclined planes and form an "eight" shape with each other. The part of the arc-shaped protrusion 142 located on both sides of the corresponding short groove 143 forms a downward protruding upper tooth 144. The horizontally opposite sides of the upper tooth 144 are inclined planes and vertical planes, respectively. The horizontally opposite sides of the lower tooth 145 are inclined planes. The bottom of the long groove 141 and the bottom of the short groove 143 correspond to one of the inclined planes of a certain lower tooth 145, respectively. The top of the stop groove 146 corresponds to the inclined plane of a certain upper tooth 144.

[0025] To achieve the limiting function of the spin tube 14 and facilitate processing and assembly, the upper end of the long groove 141 extends to the upper end of the spin tube 14 and opens. The upper end of the inner tube 12 of the lifting device is provided with external threads and the limiting nut 13 is fitted on the upper end of the inner tube 12 of the lifting device. On the outer circumference of the inner tube 12 of the lifting device, a section above the inner tube disc 19 and below the spin tube 14 has an increased outer diameter and forms an annular step 15 at the position of the change in outer diameter. The upper and lower ends of the spin tube 14 are limited by the limiting nut 13 and the annular step 15, respectively.

[0026] In order to achieve the linkage function between the upper hook 5 and the lower hook 10 and maintain the downward rotation stress, the linkage device includes a connecting rod 17 and a tension spring 16. The upper end of the connecting rod 17 is rotatably connected to the cantilever of the corresponding upper hook 5, and the lower end of the connecting rod 17 is rotatably connected to the cantilever of the corresponding lower hook 10. The upper end of the tension spring 16 is connected to the upper part of the corresponding connecting rod 17, and the lower end of the tension spring 16 is connected to the lifting plate 4.

[0027] Figure 1 The image also shows an integrally formed outer ring 8 located below the circumferential edge of the lifting device 4. The outer ring 8 facilitates the installation of the lower pin 18 and the connection shaft 9 for connection with the tension spring 16. The outer ring 8 has multiple notches, and the mounting end of the lower hook 10, the lower pin 18, and the connection shaft 9 are all located in the corresponding notches.

[0028] like Figures 1-7 As shown, in application, the lifting device of the present invention is suitable for lifting objects 11 with lifting protrusions at the upper end; firstly, the lifting bracket 1 is hung on the hook 21 at the lower end of the boom (not shown in the figure, but a conventional crane boom), and the entire automatic lifting device is lifted and suspended in the air by the hook 21. At this time, the multiple locking blocks 20 of the outer tube 2 of the lifting device are respectively located in the multiple short slots 143 of the spin tube 14. Neither the spin tube 14 nor the inner tube 12 of the lifting device can move downward. Under the action of the tension spring 16, the suspended ends of the upper hook 5 and the lower hook 10 are both in a low position (but not in the lowest position), and the multiple lower hooks 10 are in an open state, such as Figure 5As shown, at this time, the lifting convex ring of the suspended object 11 can enter between multiple lower hooks 10; then the entire lifting device is moved to directly above the suspended object 11, the suspended object 11 is placed on the ground or other platform, and then the lifting device is moved downward until the lifting convex ring of the suspended object 11 enters between multiple lower hooks 10 and contacts the bottom of the inner tube disc 19, and the lifting device is controlled to continue to descend. At this time, under the obstruction of the suspended object 11, the inner tube 12 and the spin tube 14 of the lifting device move upward relative to the outer tube 2 of the lifting device. The lower inclined planes of multiple locking blocks 20 of the outer tube 2 of the lifting device contact the inclined planes of the corresponding lower convex teeth 145 on the spin tube 14. During the upward movement of the spin tube 14 relative to the outer tube 2 of the lifting device, the spin tube 14 rotates automatically (counterclockwise in the figure) until the multiple locking blocks 20 of the outer tube 2 of the lifting device are respectively placed in the corresponding multiple retaining grooves 146 on the spin tube 14, as shown. Figure 6 As shown, at this time, the inner tube 12 and the spin tube 14 of the spreader cannot continue to move upward relative to the outer tube 2 of the spreader, and the multiple lower hooks 10 are in a fully open state; then the spreader is controlled to move upward, and the outer tube 2 of the spreader moves upward. At the beginning, the inner tube 12, the spin tube 14, the spreader disc 4, and the object being lifted 11 do not move, and the suspended ends of the upper hooks 5 and the lower hooks 10 do not rotate; the outer tube 2 of the spreader continues to move upward, and the upper inclined planes of the multiple locking blocks 20 of the outer tube 2 contact the corresponding inclined planes of the corresponding upper protrusions 144 on the spin tube 14. As the outer tube 2 of the spreader continues to move upward, the spin tube 14 rotates from the upper protrusions 144 to the lower protrusions 144. The device rotates (counterclockwise in the diagram) until the multiple locking blocks 20 of the outer tube 2 are respectively placed in the corresponding long slots 141 on the rotating tube 14. During this process, the upward movement of the outer tube disc 3 will drive the suspended ends of the upper hook 5 and the lower hook 10 to rotate upward synchronously. The suspended ends of the multiple lower hooks 10 will hook the lifting convex ring of the object 11 to be lifted, thus clamping the object 11. This continues until the multiple locking blocks 20 of the outer tube 2 move above the upper end of the short slot 143, and the upper surface of the lifting convex ring of the object 11 contacts the lower surface of the inner tube disc 19, or until the locking blocks 20 are blocked by the limiting nut 13. Figure 7As shown, at this time, the suspended object 11 is reliably clamped; then the lifting device is controlled to continue moving upward, lifting the suspended object 11 and moving it to another position. Then the lifting device is controlled to continue moving downward until the suspended object 11 is placed on the ground or other platform. The lifting device continues to move downward. Since the suspended object 11, the inner tube 12 of the lifting device, the spin tube 14 and the lifting device disc 4 cannot continue to descend, the outer tube 2 of the lifting device descends relative to the spin tube 14. The lower inclined planes of the multiple clamping blocks 20 of the outer tube 2 of the lifting device contact the inclined planes of the corresponding lower protrusions 145 on the spin tube 14. During the process of the outer tube 2 of the lifting device continuing to descend relative to the spin tube 14, the spin tube 14... 4. Automatically rotate (counter-clockwise in the figure) until the multiple locking blocks 20 of the outer tube 2 of the spreader are respectively placed in the corresponding multiple retaining grooves 146 on the spin tube 14. At this time, the multiple lower hooks 10 are in a fully open state. Then, control the spreader to move upward. The outer tube 2 of the spreader moves upward, and the upper inclined planes of the multiple locking blocks 20 of the outer tube 2 of the spreader contact the corresponding inclined planes of the corresponding upper protrusions 144 on the spin tube 14. As the outer tube 2 of the spreader continues to move upward, the spin tube 14 automatically rotates (counter-clockwise in the figure) until the multiple locking blocks 20 of the outer tube 2 of the spreader are respectively placed in the corresponding multiple short grooves 143 on the spin tube 14. Figure 5 As shown, at this point, the lifting convex ring of the suspended object 11 can disengage from the multiple lower hooks 10; control the spreader to continue moving upward, the entire spreader will rise until the lifting convex ring of the suspended object 11 separates from the multiple lower hooks 10, completing the unhooking operation of the suspended object 11 and the entire lifting process, and the spreader returns to its original position. Figure 5 The status shown indicates that the equipment is ready for the next hoisting operation.

[0029] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the technical solutions of the present invention. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of the patent of the present invention.

Claims

1. An external clamping automatic lifting device, comprising a lifting bracket, characterized in that: It also includes an outer lifting tube, an inner lifting tube, a spinning tube, a lifting disc, an upper hook, and a lower hook. The lower end of the lifting bracket is connected to the upper end of the vertical outer lifting tube. The vertical spinning tube is fitted around the upper middle part of the vertical inner lifting tube and can rotate freely but cannot move vertically relative to the inner lifting tube. The outer lifting tube is fitted around the spinning tube. The horizontal lifting disc has a central through hole through which the inner lifting tube passes. The lower end of the inner lifting tube protrudes outward to form an inner tube disc. The outer tube of the lifting device is located below the lifting device disc and cannot pass through the central through hole of the lifting device disc. The lower end of the outer tube of the lifting device protrudes outward to form an outer tube disc. The outer tube disc is located above the lifting device disc and cannot pass through the central through hole of the lifting device disc. Multiple upper hooks evenly distributed on the same circumference are respectively mounted on the top of the lifting device disc by transverse upper pins. The multiple upper pins surround the outer tube disc. The suspended ends of the multiple upper hooks are all located in the area directly above the outer tube disc. Multiple lower hooks... Each of the upper and lower hooks is mounted on the lower part of the lifting device disc via a horizontal lower pin and is located directly below a plurality of corresponding upper hooks. The upper and lower hooks are connected by multiple linkage devices, causing the suspended ends to rotate downwards synchronously. The inner circumferential wall of the outer tube of the lifting device is uniformly provided with a plurality of protruding blocks along the circumferential direction. The upper part of the outer circumferential wall of the spin tube is uniformly provided with a plurality of arc-shaped protrusions protruding outwards along the circumferential direction. Each arc-shaped protrusion has an upper... The short groove is concave, and a vertical long groove is formed between two adjacent arc-shaped protrusions. The horizontal width of the long groove is greater than the horizontal width of the locking block. The upper end of the short groove is located below the upper end of the long groove. The lower part of the outer circumferential wall of the spin tube is provided with a protruding ring that protrudes outward in the circumferential direction. The upper end of the protruding ring is provided with a plurality of lower protruding teeth evenly distributed along the circumferential direction. A stop groove is formed between two adjacent lower protruding teeth. The locking block can rotate the spin tube in the process of being placed in the corresponding long groove, the stop groove, and the short groove in sequence.

2. The external clamping automatic lifting device according to claim 1, characterized in that: The upper and lower surfaces of the card block are both inclined planes and form an "eight" shape with each other. The portion of the arc-shaped protrusion located on both sides of the corresponding short groove forms an upper protrusion tooth. The horizontally opposite sides of the upper protrusion tooth are respectively inclined planes and vertical planes. The horizontally opposite sides of the lower protrusion tooth are respectively inclined planes. The bottom of the long groove and the bottom of the short groove correspond to one of the inclined planes of a certain lower protrusion tooth. The top of the stop groove corresponds to the inclined plane of a certain upper protrusion tooth.

3. The external clamping automatic lifting device according to claim 2, characterized in that: The upper end of the long groove extends to the upper end of the spin tube and opens. The upper end of the inner tube of the lifting device is provided with an external thread and a limiting nut is fitted on the upper end of the inner tube of the lifting device. On the outer circumference of the inner tube of the lifting device, a section with an increased outer diameter located above the inner tube disc and below the spin tube forms an annular step at the position where the outer diameter changes. The upper and lower ends of the spin tube are respectively limited by the limiting nut and the annular step.

4. The external clamping automatic lifting device according to claim 1, 2 or 3, characterized in that: The linkage device includes a connecting rod and a tension spring. The upper end of the connecting rod is rotatably connected to the cantilever of the corresponding upper hook, and the lower end of the connecting rod is rotatably connected to the cantilever of the corresponding lower hook. The upper end of the tension spring is connected to the upper part of the corresponding connecting rod, and the lower end of the tension spring is connected to the lifting device disc.

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