A self-balancing steel lifting device

Abstract

The utility model belongs to the technical field of hoist, disclose a kind of self-balancing type steel lifting device, including base and fixed plate, the both sides of mounting bracket are fixedly connected with slide, the both sides of fixed plate are fixedly connected with sliding block, sliding block and slide are slidably connected, the side fixedly connected with fixed block of fixed plate is rotatably connected with thread sleeve in its inside, the side of thread sleeve is equipped with slot, sliding rod is slidably connected in the inside of fixed block, one end of sliding rod is fixedly connected with plug-in block, spring is sleeved on the outer wall of sliding rod, spring, plug-in block is plugged in the inside of slot, in the utility model, when fixed plate rises to the highest point of mounting bracket, resistance block extrudes mounting bracket, drives sliding plate to slide down, V-shaped groove extrusion boss makes plug-in block separate from slot, thread sleeve idle with threaded rod, no longer drive fixed plate to rise, avoid fixed block continuous extrusion leading to motor load sudden increase, cut off overload risk from mechanical structure level, without relying on electronic sensor.

Description

Technical Field

[0001] This utility model relates to the field of hoisting technology, specifically to a self-balancing steel hoisting device. Background Technology

[0002] As an important structural component, steel is frequently and critically handled and lifted, requiring specialized lifting devices to achieve efficient and safe position transfer.

[0003] Chinese Patent Publication No. CN221625689U discloses an emergency auxiliary hoisting device for mine hoisting, including a base. The side of the base has three folding slots arranged in a circular array. The bottom of the base has a reserved slot. An extension plate is slidably inserted into the folding slot. A first bolt is threaded onto the extension plate. The bottom end of the first bolt is rotatably connected to a support foot through a bearing. Three second bolts are threaded onto the base.

[0004] However, in the aforementioned patent, when the fixed cylinder in the device rises to the maximum travel distance, it will be squeezed against the top of the rectangular frame plate for a short period of time. During this process, if the drive motor does not stop running in time, the continuous output power will cause the load on the motor output end to increase sharply. The patent does not design any overload protection mechanism for the motor. Specifically, there is neither a mechanical travel limit trigger unlocking structure nor an electrical overload power cut-off control, which makes the motor prone to burnout due to continuous overload. Based on this, this utility model designs a self-balancing steel lifting device to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a self-balancing steel lifting device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A self-balancing steel lifting device includes a base and a fixed plate. Sliding strips are fixedly connected to both sides of the mounting frame, and sliding blocks are fixedly connected to both sides of the fixed plate. The sliding blocks and sliding strips are slidably connected. A fixed block is fixedly connected to one side of the fixed plate. A threaded sleeve is rotatably connected inside the fixed block. A slot is opened on one side of the threaded sleeve. A sliding rod is slidably connected inside the fixed block. A plug-in block is fixedly connected to one end of the sliding rod. A spring is sleeved on the outer wall of the sliding rod. The spring and the plug-in block are inserted into the slot.

[0007] Furthermore, a protrusion is fixedly connected to one side of the plug-in block, and a sliding plate is slidably connected inside the fixed block. A V-shaped groove is formed in the middle of the sliding plate, and the protrusion is slidably connected inside the V-shaped groove.

[0008] Furthermore, an abutment block is fixedly connected to one end of the sliding plate located outside the fixed block.

[0009] Furthermore, a mounting bracket is fixedly connected to the top of the base, and a threaded rod is rotatably connected to the middle of the mounting bracket. The threaded rod is threadedly connected to the inner wall of the threaded sleeve.

[0010] Furthermore, a motor is fixedly connected to the bottom of the base, and a first gear and a second gear are fixedly connected to the output end of the motor and the bottom end of the threaded rod, respectively. The first gear and the second gear mesh, and the diameter of the first gear is smaller than the diameter of the second gear.

[0011] Furthermore, a placement plate is rotatably connected below the fixing plate, and a folding rod is installed between the placement plate and the fixing plate.

[0012] Furthermore, a push handle is fixedly connected to the top of the mounting bracket.

[0013] Furthermore, casters are installed at the four corners of the base. Beneficial effects

[0014] 1. In this utility model, when the fixed plate rises to the highest point of the mounting bracket, the abutment block presses against the mounting bracket, causing the sliding plate to slide down. The V-groove presses against the protrusion, causing the plug-in block to disengage from the slot. The threaded sleeve rotates freely with the threaded rod and no longer drives the fixed plate to rise. This avoids the continuous pressing of the fixed block, which would cause a sudden increase in the motor load. It cuts off the risk of overload from the mechanical structure level and does not require reliance on electronic sensors.

[0015] 2. In this utility model, during the descent process, the spring preload pushes the plug block into the slot to assist in fixing the position of the threaded sleeve and the fixing block; at the same time, the threaded drive itself has self-locking properties, and the double insurance can prevent the fixing plate from sliding down unexpectedly. Even if there is a sudden power failure or motor failure, the position of the steel section can still be stably locked, eliminating the risk of falling from a height.

[0016] 3. In this utility model, the No. 1 gear at the output end of the motor meshes with the No. 2 gear at the bottom end of the threaded rod, and the No. 1 gear has a smaller diameter, forming a speed reduction transmission mechanism that can convert the high speed of the motor into the low speed of the threaded rod, while amplifying the output torque. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural diagram of the base portion of this utility model; Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle; Figure 4 This is a schematic diagram showing the disassembled motor protection structure of this utility model; Figure 5 This is a structural disassembly diagram of the threaded sleeve portion of this utility model; Figure 6 for Figure 5 A magnified structural diagram of region B in the middle; Figure 7 This is a partial structural diagram of the sliding plate of this utility model.

[0019] The labels in the diagram represent: 1. Base; 11. Mounting bracket; 12. Push handle; 13. Caster wheel; 14. Threaded rod; 15. Slide bar; 16. Fixing plate; 17. Placement plate; 18. Folding rod; 19. Slider; 2. Motor; 21. Gear No. 1; 22. Gear No. 2; 23. Fixing block; 24. Threaded sleeve; 25. Slot; 26. Sliding rod; 27. Spring; 28. Insertion block; 29. ​​Protrusion; 3. Sliding plate; 31. V-groove; 32. Abutment block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] The present invention will be further described below with reference to the embodiments.

[0022] In some embodiments, please refer to the appendix to the instruction manual. Figures 1-5A self-balancing steel lifting device includes a base 1 and a fixing plate 16. Sliding strips 15 are fixedly connected to both sides of the mounting bracket 11. Sliding blocks 19 are fixedly connected to both sides of the fixing plate 16. The sliding blocks 19 and the sliding strips 15 are slidably connected. A fixing block 23 is fixedly connected to one side of the fixing plate 16. A threaded sleeve 24 is rotatably connected inside the fixing block 23. A slot 25 is opened on one side of the threaded sleeve 24. A sliding rod 26 is slidably connected inside the fixing block 23. A plug-in block 28 is fixedly connected to one end of the sliding rod 26. A spring 27 is sleeved on the outer wall of the sliding rod 26. The spring 27 and the plug-in block 28 are inserted into the slot 25. A protrusion 29 is fixedly connected to one side of the plug-in block 28. A sliding plate 3 is slidably connected inside the fixing block 23. A V-groove 31 is opened in the middle of the sliding plate 3. The protrusion 29 is slidably connected inside the V-groove 31. An abutment block 32 is fixedly connected to one end of the sliding plate 3 outside the fixing block 23.

[0023] In this embodiment, when the fixed plate 16 moves upward along the slide bar 15 to the highest point of the mounting bracket 11, the fixed block 23 fixed on one side of the fixed plate 16 drives the contact block 32 to rise synchronously. Finally, the contact block 32 and the top of the mounting bracket 11 are pressed together. This triggering method does not require additional sensors or limit switches. It directly uses the physical contact between the existing components of the device, the contact block 32 and the mounting bracket 11, to realize the upper limit of the stroke identification. The structure is simple and highly reliable, avoiding the limit failure problem caused by electronic component failure.

[0024] After the contact block 32 is squeezed, it causes the sliding plate 3, which is slidably connected inside the fixed block 23, to slide downward. The V-groove 31 in the middle of the sliding plate 3 moves synchronously and squeezes the protrusion 29. Since the protrusion 29 is fixed on one side of the plug-in block 28 and the plug-in block 28 is slidably connected to the fixed block 23 through the sliding rod 26, the inclined thrust of the V-groove 31 will cause the protrusion 29 to slide laterally inside the fixed block 23, thereby causing the plug-in block 28 to disengage from the slot 25 of the threaded sleeve 24 and release the lock between the threaded sleeve 24 and the fixed block 23. At this time, the threaded sleeve 24 can rotate freely with the threaded rod 14 and no longer drive the fixed plate 16 to continue to rise, thus avoiding the fixed block 23 from continuously squeezing the mounting bracket 11 and causing a sudden increase in the load at the output end of the motor 2. The overload force transmission path is cut off from the mechanical structure level, effectively protecting the motor 2 from overload damage.

[0025] When the threaded rod 14 rotates in the reverse direction and is threadedly connected to the threaded sleeve, the threaded sleeve 24 rotates synchronously with the threaded rod 14. Since the slots 25 are evenly distributed on one side of the threaded sleeve 24, after the threaded sleeve 24 rotates one revolution, the slots 25 will re-align with the insertion blocks 28 in the fixing block 23. At this time, the spring 27 sleeved on the outer wall of the sliding rod 26 releases its preload, pushing the insertion blocks 28 to re-insert into the slots 25, thus locking the threaded sleeve 24 and the fixing block 23 again. This design ensures that the locking structure is reliably engaged before the fixing plate 16 descends, avoiding the problem of the threaded sleeve 24 and the threaded rod 14 rotating synchronously but not moving the fixing plate 16, and ensuring the stability of the steel section during descent under heavy load.

[0026] In some embodiments, please refer to the appendix to the instruction manual. Figures 1-5 A self-balancing steel lifting device In this embodiment, a mounting bracket 11 is fixedly connected to the upper part of the base 1, and a threaded rod 14 is rotatably connected to the middle part of the mounting bracket 11. The threaded rod 14 and the inner wall of the threaded sleeve 24 are threadedly connected. A motor 2 is fixedly connected to the lower part of the base 1. A first gear 21 and a second gear 22 are fixedly connected to the output end of the motor 2 and the bottom end of the threaded rod 14, respectively. The first gear 21 and the second gear 22 mesh. The diameter of the first gear 21 is smaller than the diameter of the second gear 22. A placement plate 17 is rotatably connected to the lower part of the fixing plate 16. A folding rod 18 is installed between the placement plate 17 and the fixing plate 16. A push handle 12 is fixedly connected to the upper part of the mounting bracket 11. Universal wheels 13 are installed at the four corners of the lower part of the base 1.

[0027] Working principle: The output end of the motor 2 fixed under the base 1 is connected to the first gear 21, which meshes with the second gear 22 at the bottom of the threaded rod 14. This converts the high speed of the motor 2 into the low speed of the threaded rod 14, while amplifying the output torque. Compared with the motor 2 directly driving the threaded rod 14, this design can improve the load-bearing capacity of the device for heavy steel sections. Even when lifting heavy steel sections, it can avoid the motor 2 from stopping or being damaged by overload due to insufficient torque, ensuring stable and reliable power transmission under heavy load conditions.

[0028] The threaded rod 14, which is rotatably connected in the middle of the mounting bracket 11, is threadedly engaged with the inner wall of the threaded sleeve 24. This allows the rotational motion transmitted by the motor 2 through the gear set to be precisely converted into linear motion of the threaded sleeve 24 along the axial direction of the threaded rod 14. This, in turn, drives the fixed plate 16 to rise and fall smoothly. Compared with chain drive, belt drive, and other methods, threaded drive has no risk of slippage and can achieve uniform control of the lifting speed of the fixed plate 16. This avoids the swaying of the steel section due to sudden speed changes during lifting or lowering. It is especially suitable for steel section docking and installation operations where high lifting stability is required.

[0029] The folding rod 18 installed between the placement plate 17 and the fixed plate 16 forms a triangular support structure when the placement plate 17 unfolds the load-bearing steel. The stability of the triangle is used to distribute the pressure of the steel weight on the placement plate 17, preventing the placement plate 17 from bending or deforming due to heavy load. When the device is idle or being transported, the folding rod 18 can be folded and stored, causing the placement plate 17 to fit against the fixed plate 16, reducing the overall size of the device and facilitating storage and handling. This dual-purpose support and storage design ensures both load-bearing safety and portability. The casters 13 installed at the four corners of the base 1 allow the device to rotate 360°. In the factory workshop, operators can easily push the device to switch between different workstations without the need for hoisting equipment.

[0030] Working principle: The casters 13 installed at the four corners of the base 1 provide basic support for movement. The operator can apply pushing or pulling force by holding the push handle 12 fixed above the mounting frame 11 to make the device roll along the ground, achieving 360° turning and movement in any direction. After the device moves to the working point where the steel section needs to be lifted, the force is stopped, and the motor 2 fixed below the base 1 is started. The output end of the motor 2 drives the first gear 21 to rotate. Since the first gear 21 meshes with the second gear 22 fixed at the bottom of the threaded rod 14, and the diameter of the first gear 21 is smaller than that of the second gear 22, according to the gear transmission principle, the high speed of the first gear 21 is converted into the low speed of the second gear 22, and the output torque is amplified to ensure that the device has the power to lift heavy steel sections.

[0031] The second gear 22 drives the threaded rod 14, which is rotatably connected in the middle of the mounting frame 11, to rotate synchronously. The threaded rod 14 is rotatably connected to the inner wall of the threaded sleeve 24 in the fixing block 23 on one side of the fixing plate 16. The sliders 19 fixed on both sides of the fixing plate 16 are slidably connected to the slide bars 15 fixed on both sides of the mounting frame 11, which restricts the rotational freedom of the fixing plate 16. Therefore, the rotational motion of the threaded rod 14 is converted into the linear motion of the threaded sleeve 24 along the axial direction of the threaded rod 14, which in turn drives the fixing plate 16, the placement plate 17 and the profile steel to rise steadily along the slide bars 15. During the lifting process, the spring 27 sleeved on the outer wall of the sliding rod 26 is always in a pre-compressed state, which pushes the plug block 28 to be inserted into the slot 25 of the threaded sleeve 24, which helps to fix the relative position of the threaded sleeve 24 and the fixing block 23, avoids the threaded transmission from moving and improves the smoothness of lifting.

[0032] When the fixed plate 16 rises along the slide bar 15 to the highest point of the mounting bracket 11, the fixed block 23 on one side of the fixed plate 16 drives the abutment block 32 at the end of the sliding plate 3 to rise synchronously, and the abutment block 32 is squeezed against the top of the mounting bracket 11; the squeezing force drives the sliding plate 3 to slide downward inside the fixed block 23, and the V-groove 31 in the middle of the sliding plate 3 moves synchronously, squeezing the protrusion 29 that is fixedly connected to the plug-in block 28; under the inclined thrust of the V-groove 31, the protrusion 29 drives the plug-in block 28 to slide along the inside of the fixed block 23, disengage from the slot 25 of the threaded sleeve 24, and release the lock between the threaded sleeve 24 and the fixed block 23; at this time, the threaded sleeve 24 rotates freely with the threaded rod 14 and no longer drives the fixed plate 16 to rise, avoiding the fixed block 23 from continuously squeezing the mounting bracket 11, which would cause a sudden increase in the load on the motor 2, and achieving mechanical overload protection of the upper limit of the stroke.

[0033] When descent is required, the control motor 2 rotates in the reverse direction, driving the first gear 21, the second gear 22, and the threaded rod 14 to rotate in the reverse direction. When the threaded rod 14 rotates in the reverse direction, the threaded sleeve 24 rotates synchronously with it. After the threaded sleeve 24 rotates one revolution, the slot 25 on the threaded sleeve 24 realigns with the insertion block 28 in the fixed block 23. The spring 27 releases the preload, pushing the insertion block 28 to re-insert into the slot 25, completing the locking of the threaded sleeve 24 and the fixed block 23. After locking, the reverse rotation of the threaded rod 14 is transmitted to the fixed plate 16 through the threaded sleeve 24 and the fixed block 23, driving the fixed plate 16, the placement plate 17, and the profile steel to descend smoothly along the slide bar 15 until they reach the target position, completing one lifting operation cycle.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A self-balancing steel lifting device, comprising a base (1) and a fixing plate (16), characterized in that: Slide rails (15) are fixedly connected to both sides of the mounting bracket (11), and sliders (19) are fixedly connected to both sides of the fixing plate (16). The sliders (19) and slide rails (15) are slidably connected. A fixing block (23) is fixedly connected to one side of the fixing plate (16). A threaded sleeve (24) is rotatably connected inside the fixing block (23). A slot (25) is opened on one side of the threaded sleeve (24). A sliding rod (26) is slidably connected inside the fixing block (23). A plug-in block (28) is fixedly connected to one end of the sliding rod (26). A spring (27) is sleeved on the outer wall of the sliding rod (26). The spring (27) and the plug-in block (28) are inserted into the slot (25).

2. The self-balancing steel lifting device according to claim 1, characterized in that, A protrusion (29) is fixedly connected to one side of the plug block (28), and a sliding plate (3) is slidably connected inside the fixed block (23). A V-groove (31) is opened in the middle of the sliding plate (3), and the protrusion (29) is slidably connected inside the V-groove (31).

3. The self-balancing steel lifting device according to claim 2, characterized in that, The sliding plate (3) is fixedly connected to an abutment block (32) at one end outside the fixed block (23).

4. The self-balancing steel lifting device according to claim 1, characterized in that, A mounting bracket (11) is fixedly connected above the base (1), and a threaded rod (14) is rotatably connected to the middle of the mounting bracket (11). The threaded rod (14) and the inner wall of the threaded sleeve (24) are threadedly connected.

5. A self-balancing steel lifting device according to claim 4, characterized in that, A motor (2) is fixedly connected to the bottom of the base (1). The output end of the motor (2) and the bottom end of the threaded rod (14) are respectively fixedly connected to a first gear (21) and a second gear (22). The first gear (21) and the second gear (22) mesh. The diameter of the first gear (21) is smaller than the diameter of the second gear (22).

6. A self-balancing steel lifting device according to claim 5, characterized in that, A placement plate (17) is rotatably connected below the fixing plate (16), and a folding rod (18) is installed between the placement plate (17) and the fixing plate (16).

7. A self-balancing steel lifting device according to claim 6, characterized in that, A push handle (12) is fixedly connected to the top of the mounting bracket (11).

8. A self-balancing steel lifting device according to claim 1, characterized in that, The base (1) is equipped with casters (13) at the four corners below.

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