Electric lifting platform

Abstract

The invention discloses an electric lifting platform which comprises a lifting platform body, the lifting platform body comprises a base, a shearing lifting rod is hinged to the top of the base, a lifting platform surface is hinged to the top end of the shearing lifting rod, wheels are installed at the four corners of the bottom of the base, and the wheels are used for supporting and sliding the base. Supporting structures are arranged at the four corners of the top of the base and can limit the base, and the contact area between the base and the ground is increased. Through linkage of the supporting structure and the transmission structure, supporting is automatically unfolded when the lifting table top reaches the critical height, the contact area of the base and the ground is increased by 40%-60%, the shearing moment is effectively dispersed, the gravity center offset is reduced to 1 / 3 of that of a traditional structure, meanwhile, mechanical transmission is adopted for replacing manual operation, the lock missing risk is avoided, and the safety is improved. And stability can still be kept under the wet and slippery ground, and the sliding probability is reduced by 80%.

Description

Technical Field

[0001] The present invention relates to the technical field of electric lifting platforms, in particular to an electric lifting platform. Background Art

[0002] An electric lift is an electrically powered device used to lift goods or people vertically. It is widely used in industries such as industry, construction, and medical care to improve work efficiency and ensure safety.

[0003] For example, the patent application number disclosed on the China Patent Network is: 201910110785.0, and the patent name is: An electric lifting platform, including a guard plate, an electric control box, a push rod, a lifting platform, a scissors frame, a connecting screw, an adjuster, a base, a hydraulic cylinder, and a pulley. The lifting platform is arranged on the top of the scissors frame, and the scissors frames on the left and right sides are connected as a whole by a connecting screw. A hydraulic cylinder is provided in the middle position inside the scissors frame. The present invention is provided with a adjuster, which is connected between the scissors frame and the hydraulic cylinder with a movable chamber. The movable rod and the adjustment block are adjusted by the motor to perform telescopic activities. When the lifting platform rises to a certain position, when the lifting platform is powered off, the scissors frame and the lifting platform are positioned and fixed with a positioning block to prevent the lifting platform from suddenly falling, thereby protecting the transported items and improving the use effect of the electric lifting platform.

[0004] However, the existing electric lift platform mainly relies on shear force to control the rise. When the lifting platform's load-bearing surface moves to a certain height, the shear force-driven lifting mechanism has fewer support points at high altitudes, resulting in an imbalance in torque, especially when heavy objects are loaded on the top, which exacerbates the center of gravity shift.

[0005] If the cargo shakes during the lifting process (such as the inertial impact when the handling equipment starts / stops), the center of gravity shift effect will be further amplified. Frequent center of gravity shifts will cause stress concentration at the scissor arm hinge, accelerating metal fatigue.

[0006] Secondly, the independently operated wheel buckles make the locking procedures cumbersome and there is a risk of missed locks. The friction coefficient of the hard polyurethane wheels on wet ground drops by 60%, and they may still slip even if the buckles are locked. Moreover, in the event of a sudden power outage, if the operator needs to manually lock all wheels, the average time consumption is too high. During this period, the unlocked lifting platform may be moved by external force, causing the cargo to fall. Summary of the Invention

[0007] In order to solve the problems raised in the above background technology, the purpose of the present invention is to provide an electric lifting platform with the advantage of improving operational safety.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solutions: an electric lifting platform, comprising a lifting platform body; The lifting platform body includes a base, the top of the base is hinged with a shear lifting rod, the top of the shear lifting rod is hinged with a lifting platform, wheels are installed at the four corners of the bottom of the base, the wheels are used to support the sliding of the base, and support structures are provided at the four corners of the top of the base, the support structure can limit the base and increase the contact area between the base and the ground, and the surface of the lifting platform is provided with a transmission structure, which can automatically control the support of the support structure when the lifting platform moves to a certain height.

[0009] As a preferred embodiment of the present invention, the support structure includes a bracket fixedly connected to the front and back sides of the base, the outer side of the bracket is movably connected to a support plate through a pin shaft, the support plate extends to the outer side of the base away from the bracket and is flush with the bottom of the wheel, the bottom of the support plate is fixedly connected to a damping pad, the damping pad is elastic, and the transmission structure can control the swing of the support plate and support the base during the movement of the lifting platform.

[0010] As a preferred embodiment of the present invention, the transmission structure includes a vertical plate fixedly connected to the outside of the lifting platform, a tooth plate is provided on the outside of the vertical plate, and the lifting platform can use the vertical plate to carry the tooth plate for vertical lifting and lowering, and the side of the support plate close to the bracket is fixedly connected with a gear located on the outside of the tooth plate, and the tooth plate and the gear are engaged with each other. During the vertical lifting process, the tooth plate can control the rotation of the gear and carry the support plate to swing.

[0011] As a preferred embodiment of the present invention, the surface of the vertical plate is set to be hollow, and the inner side of the tooth plate is threadedly connected to a bolt located inside the vertical plate. The bolt and the hollow groove on the surface of the vertical plate slide with each other. During the vertical rise of the vertical plate following the lifting platform, the vertical plate first slides on the surface of the bolt using the hollow groove. When the bolt slides to the bottom, the vertical plate uses the inner wall of the hollow groove to pull the bolt to follow the rise.

[0012] As a preferred embodiment of the present invention, both sides of the front and back of the base are movably connected with connecting rods through pins, the connecting rods are located on the inner side of the bracket, and the side of the connecting rod away from the base is fixedly connected to a pressure plate, the pressure plate is located on the inner side of the wheel and is in squeeze contact with the rolling end of the wheel, and a driving structure is provided on the outer side of the pressure plate, which can utilize the power of the transmission structure and control the pressure plate to apply fixed pressure to the wheel.

[0013] As a preferred embodiment of the present invention, the driving structure includes a force-bearing rod fixedly connected to the outside of the connecting rod, and the end of the force-bearing rod away from the connecting rod is set to an outwardly inclined extension state, and the side of the force-bearing rod away from the connecting rod extends to the outside of the vertical plate. The outside of the vertical plate is fixedly connected with a pressure rod, and the pressure rod is located on the outside of the force-bearing rod and slides with the force-bearing rod. When the vertical plate rises with the lifting platform, the pressure rod can be used to squeeze the force-bearing rod to swing.

[0014] As a preferred embodiment of the present invention, the wheel consists of a connecting part, a roller and an axle rod, the axle rod is fixedly connected to the axis center of the roller, both ends of the axle rod pass through the connecting part and are movably connected to the connecting part, a tooth groove is provided at the inner end of the axle rod, both sides of the front and back of the base are fixedly connected with a fixing plate, the inner side of the fixing plate is movably connected with an extension plate through a pin shaft, the side of the extension plate away from the fixing plate extends to the inner side of the axle rod through the bottom of the base, the side of the extension plate close to the axle rod is fixedly connected with a plug-in piece, the plug-in piece extends to the inside of the tooth groove away from the extension plate and is plugged into the tooth groove.

[0015] As a preferred embodiment of the present invention, the inner side of the extension plate and the surface of the connecting rod are fixedly connected with an oblique bevel wheel, and the oblique bevel wheels are engaged with each other. During the swinging process, the connecting rod can use the oblique bevel wheel to transfer torque to the extension plate, so that the extension plate swings synchronously and controls the plug-in piece to limit the plugging.

[0016] As a preferred embodiment of the present invention, a movable block is fixedly connected to the right side of the lifting platform, and a lap plate is movably connected to the inner side of the movable block through a pin shaft. The lap plate can swing with the pin shaft inside the movable block as the axis and overlap the surface of the shelf to eliminate the spacing.

[0017] As a preferred embodiment of the present invention, the bottom of the movable block is fixedly connected to a connecting frame, the interior of the connecting frame is movably connected to a bidirectional screw through a bearing, the front end of the bidirectional screw passes through the front side of the connecting frame and is fixedly connected to a runner, both sides of the surface of the bidirectional screw are threadedly connected to screw sleeves, the right side of the screw sleeve is movably connected to a crank through a pin, the side of the crank away from the screw sleeve is movably connected to a push rod through a pin, and the top of the push rod is in contact with the bottom of the lap plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention automatically deploys the support when the lifting platform reaches a critical height through the linkage between the support structure and the transmission structure, increasing the contact area between the base and the ground by 40%-60%, effectively dispersing the shear torque, and reducing the center of gravity offset to 1 / 3 of the traditional structure. At the same time, mechanical transmission is used to replace manual operation to avoid the risk of locking leakage. It can still maintain stability on slippery ground and reduce the probability of sliding by 80%.

[0019] 2. When the support plate of the present invention is extended, the elastic damping pad at the bottom contacts the ground, which can not only increase friction to prevent sliding, but also absorb the impact vibration during lifting and starting and stopping, reducing the shaking of the goods. The elastic damping pad can adapt to the unevenness of the ground, ensuring that the support plate effectively fits the ground and improves the support stability.

[0020] 3. The present invention directly converts the lifting motion into the expansion action of the support plate through the mechanical engagement of the tooth plate and the gear. The response speed is fast and there is no delay, ensuring that the support structure is strictly synchronized with the lifting height. At the same time, the lifting action itself is used to drive the support structure, reducing dependence on additional motors or hydraulic systems, reducing energy consumption and failure rate.

[0021] 4. The present invention allows the tooth plate to rise freely in the initial stage through the hollow groove, avoiding the false triggering of the support at a low height; after reaching the set height, forced linkage is implemented to accurately trigger the support action, and the sliding fit between the bolt and the hollow groove can buffer the mechanical impact in the event of sudden external force, thereby protecting the integrity of the transmission structure.

[0022] 5. The present invention drives the pressure plate through a connecting rod to apply pressure to the wheel in real time, continuously suppressing the wheel rolling during the lifting process to prevent sliding. At the same time, the pressure of the pressure plate increases with the increase of the lifting height, providing a greater locking effect in the high-altitude stage where higher stability is required.

[0023] 6. The present invention converts the vertical movement of the lifting platform into lateral thrust by utilizing inclined sliding, thereby simplifying the complexity of mechanical transmission and improving driving efficiency. The support structure and wheel locking action are driven by the same lifting mechanism, ensuring the time consistency of support and locking.

[0024] 7. The present invention forms a hard mechanical limit by inserting the plug-in piece into the tooth groove of the shaft rod, which completely blocks the possibility of wheel rolling. It is especially suitable for wet and slippery ground or inclined working conditions. In addition, the plug-in piece is hidden inside the shaft rod to avoid external bumps or interference from foreign objects, thereby improving the durability of the equipment.

[0025] 8. The present invention accurately transmits the swing of the connecting rod to the extension plate through the engagement of the bevel gear, ensuring that the plug-in piece is quickly inserted into the tooth groove and realizes synchronous locking. The reverse self-locking feature of the bevel gear makes it impossible for the plug-in piece to be automatically withdrawn after insertion, and it can still remain locked when the power is off.

[0026] 9. The present invention uses a hinged lap plate to swing and adjust the angle and extension length, eliminating the gap or height difference between the lifting platform and the shelf, preventing the goods from sliding. The expansion of the lap plate directly depends on the position of the lifting platform and is activated synchronously with the expansion of the supporting structure to improve operational efficiency.

[0027] 10. The present invention controls the lifting and lowering of the lap plate synchronously by rotating the bidirectional screw through the cranks and push rods on both sides of the screw sleeve, which simplifies the manual adjustment steps. In addition, the screw transmission ratio design ensures the fine-tuning accuracy of the lap plate and adapts to the requirements of shelves of different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3 This is a schematic diagram of the lap plate structure of the present invention; Figure 4 It is a schematic diagram of the local structure of the present invention; Figure 5 Schematic diagram of the support structure of the present invention; Figure 6 This is a bottom view schematic diagram of the driving structure of the present invention; Figure 7 This is a schematic diagram of the pressure plate structure of the present invention; Figure 8 For the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0029] In the figure: 1. Lifting platform body; 2. Base; 3. Shear lifting rod; 4. Lifting platform; 5. Wheel; 6. Support structure; 7. Transmission structure; 8. Bracket; 9. Support plate; 10. Damping pad; 11. Vertical plate; 12. Tooth plate; 13. Gear; 14. Bolt; 15. Connecting rod; 16. Pressure plate; 17. Driving structure; 18. Force rod; 19. Pressure rod; 20. Connecting component; 21. Roller; 22. Shaft; 23. Tooth groove; 24. Fixed plate; 25. Extension plate; 26. Connecting piece; 27. Bevel wheel; 28. Movable block; 29. ​​Lap plate; 30. Connecting frame; 31. Bidirectional screw; 32. Rotor; 33. Screw sleeve; 34. Crank; 35. Push rod; 36. Support block; 37. Baffle; 38. Right-angle plate; 39. Cross bar. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1 to 8 As shown, the present invention provides an electric lifting platform, comprising a lifting platform body 1; The lifting platform body 1 includes a base 2. The top of the base 2 is connected to multiple groups of scissor-type lifting rods through hinge points to form a foldable shear lifting mechanism, which is composed of cross scissor arms made of high-strength alloy steel. It is driven to extend and retract by hydraulic or electric push rods. The hinge points use self-lubricating bearings to ensure low-friction movement during lifting. The top of the shear lifting rod 3 is hinged with a lifting platform 4. Wheels 5 are installed at the four corners of the bottom of the base 2. The wheels 5 are used to support the sliding of the base 2. A support structure 6 is provided at each of the four corners of the base 2. In the initial state, it is retracted to the edge of the base 2. After unfolding, it can extend outward to increase the ground contact area. A transmission structure 7 is provided on the surface of the lifting platform 4. The transmission structure 7 can automatically control the support structure 6 when the lifting platform 4 moves to a certain height.

[0032] refer to Figure 5 The support structure 6 includes a bracket 8 fixedly connected to the front and back sides of the base 2. The outer side of the bracket 8 is movably connected to a support plate 9 through a pin shaft. The support plate 9 extends to the outer side of the base 2 away from the side of the bracket 8 and is flush with the bottom of the wheel 5. The bottom of the support plate 9 is fixedly connected to a damping pad 10. The damping pad 10 is elastic. The transmission structure 7 can control the swing of the support plate 9 and support the base 2 during the movement of the lifting platform 4.

[0033] As a technical optimization solution of the present invention, when the support plate 9 is extended, the bottom elastic damping pad 10 contacts the ground, which can not only increase friction to prevent sliding, but also absorb the impact vibration during lifting and starting and stopping, and reduce the shaking of goods. The elastic damping pad 10 can adapt to the unevenness of the ground, ensure that the support plate 9 effectively fits the ground, and improve the support stability.

[0034] refer to Figure 5 The transmission structure 7 includes a vertical plate 11 fixedly connected to the outside of the lifting platform 4, and a tooth plate 12 is provided on the outside of the vertical plate 11. The lifting platform 4 can use the vertical plate 11 to carry the tooth plate 12 to vertically lift and lower. The support plate 9 is fixedly connected to the side close to the bracket 8 with a gear 13 located on the outside of the tooth plate 12. The tooth plate 12 and the gear 13 are engaged with each other. During the vertical lifting process of the tooth plate 12, the gear 13 can be controlled to rotate and carry the support plate 9 to swing.

[0035] As a technical optimization solution of the present invention, the lifting motion is directly converted into the expansion action of the support plate 9 through the mechanical engagement of the tooth plate 12 and the gear 13, with a fast response speed and no delay, ensuring that the support structure 6 is strictly synchronized with the lifting height. At the same time, the lifting action itself is used to drive the support structure 6, reducing dependence on additional motors or hydraulic systems, reducing energy consumption and failure rate.

[0036] refer to Figure 5The surface of the vertical plate 11 is set to be hollow, and the inner side of the tooth plate 12 is threadedly connected to the bolt 14 located inside the vertical plate 11. The bolt 14 and the hollow groove on the surface of the vertical plate 11 slide with each other. During the vertical rise of the vertical plate 11 following the lifting platform 4, the hollow groove is first used to slide on the surface of the bolt 14. When the bolt 14 slides to the bottom, the vertical plate 11 uses the inner wall of the hollow groove to pull the bolt 14 to follow the rise.

[0037] As a technical optimization solution of the present invention, the hollow groove in the initial stage allows the tooth plate 12 to rise freely, avoiding the false triggering of the support at a low height; after reaching the set height, it is forced to link and accurately trigger the support action, and the sliding fit between the bolt 14 and the hollow groove can buffer the mechanical impact in the event of sudden external force, thereby protecting the integrity of the transmission structure 7.

[0038] refer to Figure 7 Both sides of the front and back of the base 2 are movably connected with connecting rods 15 through pins. The connecting rod 15 is located on the inner side of the bracket 8. The side of the connecting rod 15 away from the base 2 is fixedly connected to a pressure plate 16. The pressure plate 16 is located on the inner side of the wheel 5 and is in squeeze contact with the rolling end of the wheel 5. A driving structure 17 is provided on the outer side of the pressure plate 16. The driving structure 17 can utilize the power of the transmission structure 7 and control the pressure plate 16 to apply a fixed pressure to the wheel 5.

[0039] As a technical optimization solution of the present invention, the pressure plate 16 is driven by the connecting rod 15 to apply pressure to the wheel 5 in real time, continuously suppressing the rolling of the wheel 5 during the lifting process to avoid sliding. At the same time, the pressure of the pressure plate 16 increases with the increase of the lifting height, providing a greater locking effect in the high-altitude stage where higher stability is required.

[0040] refer to Figure 7 The driving structure 17 includes a force-bearing rod 18 fixedly connected to the outside of the connecting rod 15. The end of the force-bearing rod 18 away from the connecting rod 15 is set to an outwardly inclined extension state. The force-bearing rod 18 extends to the outside of the vertical plate 11 away from the side of the connecting rod 15. A pressure rod 19 is fixedly connected to the outside of the vertical plate 11. The pressure rod 19 is located on the outside of the force-bearing rod 18 and slides with the force-bearing rod 18. When the vertical plate 11 rises with the lifting platform 4, the pressure rod 19 can be used to squeeze the force-bearing rod 18 to swing.

[0041] As a technical optimization solution of the present invention, the vertical movement of the lifting platform is converted into lateral thrust by utilizing inclined sliding, thereby simplifying the complexity of mechanical transmission and improving driving efficiency. The locking actions of the support structure 6 and the wheel 5 are both driven by the same set of lifting mechanisms, ensuring the temporal consistency of support and locking.

[0042] refer to Figure 8The wheel 5 consists of a connecting part 20, a roller 21 and a shaft 22. The shaft 22 is fixedly connected to the axis of the roller 21. Both ends of the shaft 22 pass through the connecting part 20 and are movably connected to the connecting part 20. A tooth groove 23 is provided at the inner end of the shaft 22. Both sides of the front and back of the base 2 are fixedly connected with a fixing plate 24. The inner side of the fixing plate 24 is movably connected with an extension plate 25 through a pin shaft. The side of the extension plate 25 away from the fixing plate 24 extends to the inner side of the shaft 22 through the bottom of the base 2. The side of the extension plate 25 close to the shaft 22 is fixedly connected with a plug-in piece 26. The plug-in piece 26 extends to the inside of the tooth groove 23 away from the side of the extension plate 25 and is plugged into the tooth groove 23.

[0043] As a technical optimization solution of the present invention, a hard mechanical limit is formed by inserting the plug-in piece 26 into the tooth groove 23 of the shaft rod 22, which completely blocks the possibility of the wheel 5 rolling. It is particularly suitable for wet and slippery ground or inclined working conditions. Moreover, the plug-in piece 26 is hidden inside the shaft rod 22 to avoid external bumps or interference from foreign objects, thereby improving the durability of the equipment.

[0044] refer to Figure 8 The inner side of the extension plate 25 and the surface of the connecting rod 15 are fixedly connected with an inclined cone wheel 27, and the inclined cone wheels 27 are engaged with each other. During the swinging process, the connecting rod 15 can use the inclined cone wheel 27 to transmit the torque to the extension plate 25, so that the extension plate 25 swings synchronously and controls the plug-in piece 26 to limit the plugging.

[0045] As a technical optimization solution of the present invention, the swing of the connecting rod 15 is accurately transmitted to the extension plate 25 through the engagement of the bevel wheel 27, ensuring that the plug-in piece 26 is quickly inserted into the tooth groove 23 to achieve synchronous locking. The reverse self-locking feature of the bevel wheel 27 makes it impossible for the plug-in piece 26 to be withdrawn by itself after insertion, and it can still remain locked when the power is off.

[0046] refer to Figure 3 The right side of the lifting platform 4 is fixedly connected with a movable block 28, and the inner side of the movable block 28 is movably connected with a lap plate 29 through a pin shaft. The lap plate 29 can swing with the pin shaft inside the movable block 28 as the axis and overlap the surface of the shelf to eliminate the spacing.

[0047] As a technical optimization solution of the present invention, the hinged lap plate 29 can be swung to adjust the angle and extension length, thereby eliminating the gap or height difference between the lifting platform and the shelf and preventing the goods from slipping. The expansion of the lap plate 29 directly depends on the position of the lifting platform 4 and is activated synchronously with the expansion of the support structure 6 to improve operational efficiency.

[0048] refer to Figure 4The bottom of the movable block 28 is fixedly connected to a connecting frame 30, and the interior of the connecting frame 30 is movably connected to a bidirectional screw 31 through a bearing. The front end of the bidirectional screw 31 passes through the front side of the connecting frame 30 and is fixedly connected to a runner 32. Both sides of the surface of the bidirectional screw 31 are threadedly connected to screw sleeves 33. The right side of the screw sleeve 33 is movably connected to a crank 34 through a pin. The side of the crank 34 away from the screw sleeve 33 is movably connected to a push rod 35 through a pin. The top of the push rod 35 contacts the bottom of the lap plate 29.

[0049] As a technical optimization solution of the present invention, by rotating the bidirectional screw 31, the crank 34 and the push rod 35 on both sides of the screw sleeve 33 are used to synchronously control the lifting and lowering of the lap plate 29, thereby simplifying the manual adjustment steps. In addition, the screw transmission ratio design ensures the fine-tuning accuracy of the lap plate 29 to adapt to the requirements of shelves of different heights.

[0050] refer to Figure 4 The rest of the structure remains unchanged. The present invention proposes a structure to prevent goods from falling. The front and back of the load-bearing table are fixedly connected to support blocks 36. The inner side of the support block 36 is movably connected to a baffle 37 through a pin shaft. The baffle 37 can limit the goods on the top of the load-bearing table. The pin shaft on the right side of the baffle 37 passes through the right side of the support block 36 and is fixedly connected to a right-angle plate 38. The left side of the screw sleeve 33 is fixedly connected to a cross bar 39. The cross bar 39 extends away from the side of the screw sleeve 33 to the bottom of the right-angle plate 38 and is slidably connected to the right-angle plate 38. During the process of moving toward each other, the screw sleeve 33 can not only control the swing of the crank 34, but also use the cross bar 39 to squeeze the right-angle plate 38 to control the flipping of the baffle 37.

[0051] By adjusting the height of the lap plate 29 and pushing the right-angle plate 38 through the cross bar 39 to automatically flip the baffle 37, a barrier protection is formed to reduce the risk of cargo falling. In addition, a single rotation operation simultaneously completes the adjustment of the lap plate 29 and the deployment of the baffle 37, avoiding the complexity and omissions of step-by-step operations.

[0052] The working principle and use process of the present invention are as follows: After the operator starts the lifting mechanism, the shear lifting rod 3 begins to extend, driving the lifting platform 4 to rise vertically. At this time, the vertical plate 11 on the outside of the lifting platform 4 rises synchronously, and the hollow groove on its surface first slides on the surface of the fixing bolt 14 until the bolt 14 reaches the lower end of the hollow groove. When the lifting platform 4 reaches the set height threshold, about 1 / 3 of the total stroke, the vertical plate 11 drives the bolt 14 to rise synchronously through the inner wall of the hollow groove. At this time, the tooth plate 12 fixed on the outside of the vertical plate 11 begins to mesh with the gear 13 at the top of the support plate 9. The tooth plate 12 rises every 10 mm can drive the gear 13 to rotate 15 degrees, so that the support plate 9 is expanded outward with the pin as the center of the circle. When the damping pad 10 at the bottom of the support plate 9 contacts the ground, the support area of ​​the base 2 increases by 40%, effectively dispersing the shear torque. When the vertical plate 11 rises, its outer pressure rod 19 begins to squeeze the inclined surface of the force rod 18. The force rod 18 swings with the connecting rod 15 as the axis, driving the pressure plate 16 to apply 3-5kN lateral pressure to the rolling surface of the wheel 5. At the same time, the inclined cone wheel 27 on the surface of the connecting rod 15 transmits the torque to the extension plate 25, so that the plug-in piece 26 is inserted into the tooth groove 23 of the shaft rod 22 at a speed of 0.8m / s. , complete the mechanical locking, when the lifting platform 4 continues to rise to the working height, the vertical plate 11 gear plate 12 and the support plate 9 gear 13 maintain constant torque engagement to ensure the support stability of the lifting platform body 1, when the lifting platform body 1 is fully extended and the goods need to be transported, the operator rotates the wheel 32 at the front end of the connecting frame 30, drives the bidirectional screw 31 to drive the screw sleeves 33 on both sides to move toward each other, and the crank 34 on the right side of the screw sleeve 33 pushes the push rod 35 downward to disengage the push rod 35 from the lap plate 29, and the lap plate 29 that has lost the lifting force swings with the pin as the axis to make it separate from the shelf The contact surface forms a three-point support. At this time, the lap plate 29 eliminates the distance between the lifting platform 4 and the shelf. During the movement of the screw sleeve 33, the cross bar 39 on the left side of the screw sleeve 33 synchronously pushes the right-angle plate 38, driving the baffle 37 to flip 70° to form a cargo enclosure. This process can reduce the probability of cargo displacement by 85%. In the event of a sudden power outage, the lifting platform 4 may fall due to excessive load, and the tooth plate 12, gear 13 and bevel wheel 27 can use their own transmission efficiency to eliminate the impact force during the fall, thereby slowing down the falling speed of the lifting platform 4 and achieving the effect of preventing falling and pinching. When the lifting platform body 1 is used up, the tooth plate 12 reverse drives the gear 13 to retract the support plate 9, and the pressure plate 16 is reset with the connecting rod 15 to release the wheel 5 lock. When the lifting platform 4 is lowered to the initial height, the lap plate 29 rises and resets under the action of the push rod 35, and the baffle 37 is restored to a vertical state through the right-angle plate 38 counterweight, completing the operation cycle.

[0053] To sum up: this electric lifting platform, through the linkage of the support structure 6 and the transmission structure 7, automatically deploys the support when the lifting platform surface 4 reaches a critical height, increases the contact area between the base 2 and the ground by 40%-60%, effectively disperses the shear torque, and reduces the center of gravity offset to 1 / 3 of the traditional structure. At the same time, mechanical transmission is used to replace manual operation to avoid the risk of locking leakage, and it can still maintain stability on slippery ground, reducing the probability of sliding by 80%.

[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An electric lifting platform, comprising a lifting platform body; Its characteristics are: The lifting platform body includes a base, the top of the base is hinged with a shear lifting rod, the top of the shear lifting rod is hinged with a lifting platform, wheels are installed at the four corners of the bottom of the base, the wheels are used to support the sliding of the base, and support structures are provided at the four corners of the top of the base, the support structure can limit the base and increase the contact area between the base and the ground, and the surface of the lifting platform is provided with a transmission structure, which can automatically control the support of the support structure when the lifting platform moves to a certain height.

2. The electric lift platform according to claim 1, characterized in that: The support structure includes a bracket fixedly connected to the front and back sides of the base, and the outer side of the bracket is movably connected to a support plate through a pin shaft. The support plate extends to the outer side of the base away from the bracket and is flush with the bottom of the wheel. The bottom of the support plate is fixedly connected to a damping pad, and the damping pad is elastic. The transmission structure can control the swing of the support plate and support the base during the movement of the lifting platform.

3. The electric lift platform according to claim 2, characterized in that: The transmission structure includes a vertical plate fixedly connected to the outside of the lifting platform, and a tooth plate is provided on the outside of the vertical plate. The lifting platform can use the vertical plate to carry the tooth plate to vertically lift and lower. The side of the support plate close to the bracket is fixedly connected to a gear located on the outside of the tooth plate. The tooth plate and the gear are engaged with each other. During the vertical lifting process, the tooth plate can control the rotation of the gear and carry the support plate to swing.

4. The electric lifting platform according to claim 3, characterized in that: The surface of the vertical plate is set to be hollow, and the inner side of the tooth plate is threadedly connected to a bolt located inside the vertical plate. The bolt and the hollow groove on the surface of the vertical plate slide with each other. During the vertical rise of the vertical plate following the lifting platform, the hollow groove is first used to slide on the surface of the bolt. When the bolt slides to the bottom, the vertical plate uses the inner wall of the hollow groove to pull the bolt to follow the rise.

5. The electric lifting platform according to claim 4, characterized in that: Both sides of the front and back of the base are movably connected with connecting rods through pins, and the connecting rods are located on the inner side of the bracket. The side of the connecting rod away from the base is fixedly connected to a pressure plate, and the pressure plate is located on the inner side of the wheel and is in squeeze contact with the rolling end of the wheel. A driving structure is provided on the outer side of the pressure plate, and the driving structure can utilize the power of the transmission structure and control the pressure plate to apply fixed pressure to the wheel.

6. The electric lifting platform according to claim 5, characterized in that: The driving structure includes a force-bearing rod fixedly connected to the outside of the connecting rod, and the end of the force-bearing rod away from the connecting rod is set to an outwardly inclined extension state, and the side of the force-bearing rod away from the connecting rod extends to the outside of the vertical plate. The outside of the vertical plate is fixedly connected with a pressure rod, and the pressure rod is located on the outside of the force-bearing rod and slides with the force-bearing rod. When the vertical plate rises with the lifting platform, the pressure rod can be used to squeeze the force-bearing rod and swing.

7. The electric lifting platform according to claim 6, characterized in that: The wheel consists of a connecting part, a roller and an axle rod, the axle rod is fixedly connected to the axis center of the roller, both ends of the axle rod pass through the connecting part and are movably connected to the connecting part, a tooth groove is provided at the inner end of the axle rod, both sides of the front and back sides of the base are fixedly connected with a fixing plate, the inner side of the fixing plate is movably connected with an extension plate through a pin shaft, the side of the extension plate away from the fixing plate extends to the inner side of the axle rod through the bottom of the base, the side of the extension plate close to the axle rod is fixedly connected with a plug-in piece, the plug-in piece extends to the inside of the tooth groove away from the extension plate and is plugged into the tooth groove.

8. The electric lift platform according to claim 7, characterized in that: The inner side of the extension plate and the surface of the connecting rod are fixedly connected with an oblique cone wheel, and the oblique cone wheels are engaged with each other. During the swinging process of the connecting rod, the oblique cone wheel can transmit the torque to the extension plate, so that the extension plate swings synchronously and controls the plug-in piece to limit the plugging.

9. The electric lifting platform according to claim 8, characterized in that: A movable block is fixedly connected to the right side of the lifting platform, and a lap plate is movably connected to the inner side of the movable block through a pin shaft. The lap plate can swing with the pin shaft inside the movable block as the axis and overlap the surface of the shelf to eliminate the spacing.

10. The electric lifting platform according to claim 9, characterized in that: The bottom of the movable block is fixedly connected to a connecting frame, and a bidirectional screw is movably connected to the interior of the connecting frame through a bearing. The front end of the bidirectional screw passes through the front side of the connecting frame and is fixedly connected to a runner. Both sides of the surface of the bidirectional screw are threadedly connected to screw sleeves, and the right side of the screw sleeve is movably connected to a crank through a pin shaft. The side of the crank away from the screw sleeve is movably connected to a push rod through a pin shaft, and the top of the push rod contacts the bottom of the lap plate.

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