A building construction support device for construction engineering

Abstract

The present invention discloses a building construction support device for construction engineering, which includes a bottom plate, a driving mechanism, a lifting mechanism, a limiting mechanism and an unfolding mechanism. On both horizontal and lateral sides of the upper surface of the bottom plate, there are fixedly connected with a first fixing seat. The first fixing seats are all rotatably connected with a first bracket through a pin shaft. The middle sections of the first brackets are all rotatably connected with a second bracket through a pin shaft. The tops of the second brackets are all rotatably connected with a second fixing seat through a pin shaft. The tops of the second fixing seats are jointly fixedly connected with the same top plate. On one horizontal and longitudinal side of the top plate, there is fixedly connected with a level. By setting the lifting mechanism, while realizing the synchronous lifting of the device, it can further cooperate with the driving mechanism to realize the unilateral lifting operation; by setting the limiting mechanism, the maximum rising height of the device can be freely controlled; by setting the unfolding mechanism, after the device reaches the maximum rising height, it can automatically switch and complete the platform unfolding operation.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and specifically provides a building construction support device for construction projects. Background Art

[0002] In building construction, the support device, as a key construction equipment, is mainly used to provide stability and safety during the construction process, especially in high-rise buildings, underground projects, and complex construction environments. Traditional building construction support devices mostly rely on temporary structural supports, which not only require a large amount of labor and time for erection and disassembly, but also are prone to structural instability.

[0003] After retrieval, a Chinese patent with the publication number CN118407588B includes a bottom plate; support columns respectively fixedly connected to the four peripheries of the upper surface of the bottom plate; a support plate, receiving cavities on both sides inside the support plate, extension plates movably connected in the receiving cavities through first sliding rods, a first return spring sleeved outside the first sliding rods, and card slots evenly spaced on the front end surfaces of the extension plates; and an extension and reinforcement assembly, including second lead screws rotatably connected to both sides of the lower surface of the support plate in the horizontal direction, moving columns movably connected to the lower surface of the support plate, L-shaped frames fixedly connected to one side of the moving columns, and reinforcement plates movably connected above the horizontal arms of the L-shaped frames. In the above patent, the extension plates are supported by the L-shaped frames and the reinforcement plates to enhance their stability, and safety ropes and pedals are used to prevent construction workers from falling from heights.

[0004] However, in the above solution, the extension plates and the support plate together form a working platform for high-altitude operation of personnel, and they always remain parallel to the bottom plate. However, the horizontal angle of the bottom plate is limited by the ground conditions and the lifting height of the personnel adjusting the support blocks. When the ground has a slope, the working platform is also in an inclined state, resulting in risks for high-altitude operation of personnel; when controlling the lifting height of the support blocks to adjust the angle of the working platform, it is necessary to overcome the overall gravity of the device for jacking, resulting in obstacles in the adjustment process and difficulty in intuitively judging the horizontal state of the working platform; on the other hand, in the process of erecting the above solution, there are many components that need to be manually controlled and adjusted, resulting in a cumbersome unfolding process, and also requiring a large amount of labor and time for erection or disassembly, making it difficult to meet the requirements of rapid response and limiting the applicable scenarios of the device. Summary of the Invention

[0005] The purpose of the present invention is to provide a building construction support device for construction projects, which has the advantages of self-locking adjustment and rapid response, and solves the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a construction support device for construction engineering, comprising a base plate, a driving mechanism, a lifting mechanism, a limiting mechanism and an unfolding mechanism, both sides of the horizontal and horizontal upper surface of the base plate are fixedly connected with a fixing seat 1, the fixing seat 1 is rotatably connected with a bracket 1 through a pin shaft, the middle section of the bracket 1 is rotatably connected with a bracket 2 through a pin shaft, the top end of the bracket 2 is rotatably connected with a fixing seat 2 through a pin shaft, the top end of the fixing seat 2 is commonly fixedly connected with the same top plate, and one side of the horizontal and longitudinal side of the top plate is fixedly connected with a level;

[0007] The driving mechanism includes a motor as a power source of the device, and the motor penetrates and is intermittently transmission-connected with the lifting mechanism;

[0008] The lifting mechanism includes a positioning frame fixedly connected to both sides of the horizontal transverse mirror image of the middle section of the lower surface of the top plate;

[0009] The limiting mechanism comprises a lever arranged horizontally and longitudinally, one end of the lever extends into the interior of the positioning frame and the other end extends to the outside of the top plate;

[0010] The unfolding mechanism comprises two helical worm gears which are transmission-connected to the driving mechanism, and the helical worm gears are rotationally limitedly connected to the inside of the two horizontal longitudinal sides of the top plate.

[0011] Preferably, the interior of the positioning frame is penetrated and connected to a feed screw for limited rotation, a slider is screwed on the outer contour of the feed screw and the slider slides within the positioning frame, the bottom ends of the opposite surfaces of the two positioning frames are fixedly connected to the same connecting frame, one end of the feed screw pointing to the opposite surfaces of the two positioning frames extends out of the interior of the positioning frame and is fixedly connected to a bevel gear, and both ends of the slider in the horizontal and longitudinal directions are fixedly connected to positioning rods.

[0012] Preferably, the positioning rod passes through and is rotationally connected to the top end of the bracket 1 at the corresponding position.

[0013] Preferably, the output end of the motor is fixedly connected with an output shaft and the output shaft passes through the feed screw, the top end of the output shaft is fixedly connected with a helical gear, the outer contour of the helical gear is meshingly connected with a helical gear ring, the helical gear ring half penetrates and is limited in rotation and connected to the center of the lower surface of the top plate, the bottom end of the helical gear ring is fixedly connected with a positioning ring, the outer contour of the middle section of the output shaft is penetrated and limited in rotation and connected with bevel gear 2, the bevel gear 2 is connected to the positioning ring through a spline transmission, and the lower surface of the bevel gear 2 is intermittently meshingly connected to bevel gear 1.

[0014] Preferably, the driving mechanism further comprises a helical worm gear penetrating through and connected to the inside of the top plate for limited rotation, and the helical worm gear is coaxially arranged with the output shaft.

[0015] Preferably, a positioning frame is fixedly connected to one end of the lever extending into the inner part of the positioning bracket. The positioning frame is penetrated and slidably connected with a guide rail. The guide rail is fixedly connected to the positioning bracket. A ratchet rack is fixedly connected to one side of the guide rail away from the lever, and the ratchet rack is clamped with the inner wall of the positioning frame. A holding spring is fixedly connected to one side of the inner wall of the positioning frame close to the lever, and the other end of the holding spring is fixedly connected with a pressing ring which abuts against the outer surface of the guide rail.

[0016] Preferably, both of the helical worms are in meshing transmission connection with the helical worm gear, and the two helical worms are respectively located on the horizontal longitudinal sides of the helical worm gear. Rotating lead screws are fixedly connected to both ends of the helical worm. A threaded cylinder is screwed on the outer contour of the rotating lead screw. The threaded cylinders on the same horizontal side are fixedly connected with the same extension plate together.

[0017] Preferably, the thread directions of the rotating lead screws on both horizontal sides are set to be opposite, and the threaded cylinders and the extension plates penetrate and are in limit sliding connection with the inside of the top plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By arranging the lifting mechanism, while realizing the synchronous lifting of the device, further cooperating with the driving mechanism can realize the unilateral lifting operation, and then adjust the horizontal angle of the working platform to reduce the risk of high-altitude operation for personnel.

[0020] 2. By arranging the limiting mechanism, while freely controlling the maximum rising height of the device, it cooperates with the driving mechanism to complete the switching of the working mode.

[0021] 3. By arranging the unfolding mechanism, after the device reaches the maximum rising height, it automatically switches and completes the platform unfolding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 is a cross-sectional view of the main structure of the present invention;

[0024] Figure 3 is a schematic diagram of the bottom plate frame of the present invention;

[0025] Figure 4 is a schematic diagram of the lifting mechanism of the present invention;

[0026] Figure 5 is a schematic diagram of the limiting mechanism of the present invention;

[0027] Figure 6 is a partial cross-sectional view of the driving mechanism of the present invention;

[0028] Figure 7 An exploded view of the driving mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of the deployment mechanism of the present invention;

[0030] Figure 9 It is the overall workflow diagram of the present invention.

[0031] In the figure: 1. bottom plate; 11. fixing seat 1; 12. bracket 1; 13. bracket 2; 14. fixing seat 2; 15. top plate; 16. level; 2. positioning frame; 21. feed screw; 22. slide block; 23. connecting frame; 24. bevel gear 1; 25. positioning rod; 3. motor; 31. output shaft; 32. helical gear; 33. bevel gear 2; 34. positioning ring; 35. helical gear ring; 36. helical worm gear; 4. lever; 41. positioning frame; 42. guide rail; 43. ratchet bar; 44. holding spring; 45. extrusion ring; 5. helical worm; 51. rotating screw; 52. threaded barrel; 53. extension plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention. Embodiment 1:

[0033] See also Figures 1 to 9 The present invention provides a technical solution: a construction support device for construction engineering, comprising a base plate 1, a driving mechanism, a lifting mechanism, a limiting mechanism and an unfolding mechanism, both sides of the upper surface of the base plate 1 are fixedly connected with a fixing seat 11 in the horizontal and horizontal directions, the fixing seat 11 is rotatably connected with a bracket 12 through a pin shaft, the middle section of the bracket 12 is rotatably connected with a bracket 2 13 through a pin shaft, the top end of the bracket 2 13 is rotatably connected with a fixing seat 2 14 through a pin shaft, the top end of the fixing seat 2 14 is commonly fixedly connected with the same top plate 15, and one side of the top plate 15 is fixedly connected with a level 16;

[0034] The driving mechanism includes a motor 3 as a power source of the device, and the motor 3 runs through and is intermittently transmission-connected with the lifting mechanism;

[0035] The lifting mechanism includes a positioning frame 2 fixedly connected to both sides of the horizontal transverse mirror image of the middle section of the lower surface of the top plate 15;

[0036] The limiting mechanism includes a lever 4 arranged horizontally and longitudinally, one end of the lever 4 extends into the interior of the positioning frame 2 and the other end extends to the outside of the top plate 15;

[0037] The unfolding mechanism comprises two helical worm gears 5 which are transmission-connected to the driving mechanism, and the helical worm gears 5 are rotationally connected to the inside of the two horizontal and longitudinal sides of the top plate 15 in a limited position.

[0038] In this device, the bottom plate 1 is in direct contact with the ground, and the position adjustment and travel functions of the device are realized by adding a moving mechanism at the bottom of the bottom plate 1. The top plate 15 serves as the basic load-bearing structure for personnel working at high altitudes, and together with the unfolding mechanism, it constitutes a working platform for high altitude operations. The horizontal angle of the top plate 15 is further judged by observing the spirit level 16 and the lifting mechanism is adjusted accordingly to reduce the risk of personnel working at high altitudes; the fixed seat 11, the bracket 12, the bracket 2 13 and the fixed seat 2 14 cooperate with the lifting mechanism to realize the height adjustment function of the device, and the limit mechanism further freely controls the maximum height of the device to meet the personnel's requirements for the working height.

[0039] It should be noted that in the initial state, the device is in a folded state. At this time, the driving mechanism is connected to the lifting mechanism through transmission. The personnel limits the maximum unfolding height of the device by adjusting the limit mechanism. Then the driving mechanism drives the lifting mechanism to work, and the device starts to rise. When the device rises to the limited height, the lifting mechanism stops working. At this time, the driving mechanism automatically switches and starts to be connected to the unfolding mechanism through transmission. Then the unfolding mechanism realizes the unfolding operation of the working platform.

[0040] After the driving mechanism is disengaged from the lifting mechanism, the two ends of the lifting mechanism can be freely adjusted, and the horizontal angle of the top plate 15 can be further judged by the spirit level 16, and the lifting mechanism at the corresponding position can be adjusted. The lower side of the device is lifted unilaterally to ensure that the bubble in the spirit level 16 is in the center position, thereby ensuring the horizontal state of the top plate 15. Embodiment 2:

[0041] The interior of the positioning frame 2 is penetrated and connected with a feed screw 21 for limited rotation. A slider 22 is screwed on the outer contour of the feed screw 21 and the slider 22 slides within the positioning frame 2. The bottom ends of the opposite surfaces of the two positioning frames 2 are fixedly connected to the same connecting frame 23. One end of the feed screw 21 pointing to the opposite surfaces of the two positioning frames 2 extends out of the interior of the positioning frame 2 and is fixedly connected to a bevel gear 24. Both horizontal and longitudinal ends of the slider 22 are fixedly connected to positioning rods 25.

[0042] The positioning rod 25 penetrates and is rotationally connected to the top end of the bracket 12 at the corresponding position.

[0043] As can be seen from Embodiment 1, in the initial state, the driving mechanism is engaged with the lifting mechanism. At this time, the driving mechanism works and drives the two first bevel gears 24 to rotate synchronously. The first bevel gears 24 further drive the feed screw 21 to rotate. At this time, the slider 22 has a tendency to rotate synchronously with the feed screw 21. However, since the slider 22 is limited to slide inside the positioning frame 2, that is, under the combined limitation of the positioning frame 2 and the top plate 15, the slider 22 cannot rotate. At this time, under the screwing action of the feed screw 21, the slider 22 begins to travel along the axial direction of the feed screw 21.

[0044] Since the lifting mechanism is mirror - symmetrically arranged on the horizontal transverse sides in the middle of the lower surface of the top plate 15, that is, the rotation directions of the two feed screws 21 are opposite, the moving directions of the two sliders 22 are also opposite. Along with the start of the driving mechanism, the two sliders 22 move away from each other.

[0045] When the slider 22 travels along the axial direction of the feed screw 21, it drives the positioning rod 25 to move synchronously. The positioning rod 25 further pulls the top end of the first bracket 12 to move synchronously. Since the bottom end of the first bracket 12 is fixed by the first fixed seat 11 and the bottom plate 1, at this time, the first bracket 12 begins to deflect along the first fixed seat 11 along with the travel of the slider 22. The deflection of the first bracket 12 causes the projection height in the vertical direction to increase synchronously, thereby driving the corresponding side of the top plate 15 to rise. Since the two sliders 22 move synchronously when the driving mechanism is engaged with the lifting mechanism, that is, the two sides of the top plate 15 rise synchronously, thus completing the height expansion operation of the device; when the first bracket 12 deflects to a position close to the vertical position, the device expands to the maximum height.

[0046] It should be noted that during the deflection of the first bracket 12, it drives the second bracket 13 to deflect synchronously. When a person stands on the upper surface of the top plate 15, the main stress point after the device is expanded is located at the screwing connection between the slider 22 and the feed screw 21. Due to the self - locking characteristic of the screwing connection, the height adjustment process of the device also realizes self - locking. At this time, the offset of the device's center of gravity caused by the person's movement on the upper surface of the top plate 15 will not cause the device height to change, thus effectively ensuring the safety of personnel working at height; further, through the triangular support formed by the second bracket 13 and the first bracket 12 together, the load stress at the top end of the first bracket 12 is effectively dispersed to both ends of the first bracket 12 and the second bracket 13, thereby avoiding structural fracture and instability caused by stress concentration.

[0047] On the other hand, when the slider 22 travels to the maximum stroke along the feed screw 21, the slider 22 cannot move further, resulting in the locking of the feed screw 21. Further, at this time, the first bevel gear 24 is also locked and cannot rotate along with the driving mechanism. The driving mechanism starts to perform a switching operation to disengage its meshing transmission with the first bevel gear 24 and begins to engage with the unfolding mechanism for meshing transmission. Subsequently, the driving mechanism drives the unfolding mechanism to complete the unfolding operation of the device's working platform.

[0048] It should be noted that due to the uncertainty of the working position, in some cases, the device needs to be deployed on a sloping ground to complete high-altitude operations. Since the top plate 15 is initially parallel to the bottom plate 1, and the bottom plate 1 is in direct contact with the ground and synchronizes with the slope of the ground, when the two sides of the top plate 15 are synchronously raised, they are also in an inclined state, posing a safety hazard to the high-altitude operations of personnel.

[0049] Therefore, after the device completes the elevation and deployment operation on the slope, it is necessary to adjust the lifting mechanism at the corresponding position to lift the lower side of the top plate 15 unilaterally, so as to further ensure the horizontal state of the top plate 15. Since the driving mechanism is disengaged from the lifting mechanism after the device completes the elevation and deployment, at this time, the two bevel gears I 24 can be freely rotated manually under the action of an external force, and there is no interference between the rotations of the two bevel gears I 24 at this time. Thus, the angle adjustment process of the top plate 15 is completed by rotating the positioning rod 25 on the lower side of the top plate 15 to achieve unilateral lifting.

[0050] When the positioning rod 25 on the lower side is rotated, the feed screw rod 21 at the corresponding position travels again to further increase the vertical height of the support I 12 on the corresponding side. On the other side, due to the self-locking characteristic between the feed screw rod 21 and the slider 22, its overall height remains unchanged. That is, at this time, the top plate 15 deflects around the connection point of the higher-side fixed seat II 14 and the support II 13, so as to adjust the angle of the top plate 15 to ensure its horizontal state. Embodiment 3:

[0051] One end of the shift lever 4 extending into the positioning frame 2 is fixedly connected with a positioning frame 41. The positioning frame 41 is penetrated and slidably connected with a guide rail 42. The guide rail 42 is fixedly connected with the positioning frame 2. A ratchet rack 43 is fixedly connected to the side of the guide rail 42 away from the shift lever 4, and the ratchet rack 43 is mutually engaged with the inner wall of the positioning frame 41. A holding spring 44 is fixedly connected to the side of the inner wall of the positioning frame 41 close to the shift lever 4. The other end of the holding spring 44 is fixedly connected with a pressing ring 45, and the pressing ring 45 abuts against the outer surface of the guide rail 42.

[0052] As can be seen from Embodiment 2, when the slider 22 travels to the maximum stroke along the feed screw rod 21, the lifting mechanism stops working. At this time, the device reaches the maximum deployment height. Therefore, by controlling the maximum stroke of the feed screw rod 21 on the feed screw rod 21, the free adjustment of the deployment height of the device can be completed.

[0053] Before the device starts to rise and carry out the operation, the position of the limit mechanism is adjusted according to the required height of this aerial operation. During the adjustment process of the limit mechanism, the person first holds and pushes the lever 4 inward, and the lever 4 simultaneously squeezes the positioning frame 41 and causes the engagement between the positioning frame 41 and the ratchet bar 43 to disengage. During this process, the retaining spring 44 is synchronously compressed. Then the person pushes and pulls the lever 4 to drive the positioning frame 41 to move axially along the guide rail 42, and reduces the friction resistance in the process of moving the positioning frame 41 by the retaining sliding of the squeezing ring 45 on the surface of the guide rail 42. When it moves to the set position, the person releases the lever 4. At this time, the retaining spring 44 rebounds and drives the positioning frame 41 to reset to achieve re-engagement with the ratchet bar 43.

[0054] Furthermore, during the axial movement of the slider 22 along the feed screw 21, when it reaches the position in contact with the positioning frame 41, the positioning frame 41 is in a fixed state due to the clamping limit of the ratchet bar 43, that is, the slider 22 cannot continue to move, thereby causing the lifting mechanism to be locked. After the device rises to the set height, it is synchronously locked and the unfolding operation of the working platform is started.

[0055] It should be noted that when the device is lifted and deployed on a slope, it is only necessary to adjust the limit mechanism on the side close to the top of the slope to complete the control of the maximum deployment height of the device. When the slider 22 contacts and locks the positioning frame 41, the corresponding bevel gear 24 is locked synchronously, and the drive mechanism then starts the switching operation. After the switching operation is completed, the height of the device is locked, and the personnel complete the angle adjustment operation of the top plate 15 by turning the bevel gear 24 on the other side.

[0056] In one embodiment, scale lines may be added to the surface of the guide rail 42, and a pointer may be simultaneously set at a corresponding position on the outer surface of the positioning frame 41, thereby helping personnel to accurately determine the relationship between the position change of the positioning frame 41 and the maximum unfolded height of the device. Embodiment 4:

[0057] The output end of the motor 3 is fixedly connected with an output shaft 31 and the output shaft 31 passes through the feed screw 21. The top of the output shaft 31 is fixedly connected with a bevel gear 32. The outer contour of the bevel gear 32 is meshingly connected with a bevel gear ring 35. The bevel gear ring 35 is half-penetrated and limitedly rotatably connected to the center of the lower surface of the top plate 15. The bottom end of the bevel gear ring 35 is fixedly connected with a positioning ring 34. The outer contour of the middle section of the output shaft 31 is penetrated and limitedly rotatably connected with a bevel gear 2 33. The bevel gear 2 33 is connected to the positioning ring 34 through a spline transmission. The lower surface of the bevel gear 2 33 is intermittently meshingly connected with the bevel gear 1 24.

[0058] The driving mechanism further includes a helical worm gear 36 that penetrates and is rotationally connected to the inside of the top plate 15 with limited rotation, and the helical worm gear 36 is coaxially arranged with the output shaft 31.

[0059] As can be seen from Embodiment 3, in the initial state, the driving mechanism is engaged with the lifting mechanism, that is, the helical gear 32 is located inside the helical ring 35 and meshes with the helical ring 35 for transmission. At the same time, the second bevel gear 33 meshes with the two first bevel gears 24 for transmission. At this time, the motor 3 is started to drive the output shaft 31 and the helical gear 32 to rotate. The helical gear 32 further drives the helical ring 35 and the positioning ring 34 to rotate synchronously. Since the second bevel gear 33 is connected to the positioning ring 34 through spline transmission, that is, the second bevel gear 33 rotates synchronously. The rotation of the second bevel gear 33 drives the two first bevel gears 24 to rotate synchronously and the rotation directions of the two first bevel gears 24 are opposite. Further, from the movement process of Embodiment 2, at this time, the device starts to rise and unfold.

[0060] When the device rises to the set height, the two first bevel gears 24 are in a locked state, which causes the second bevel gear 33 to be unable to rotate as well. At this time, the second bevel gear 33, the positioning ring 34, and the helical ring 35 are all locked and unable to rotate, while the helical gear 32 continues to rotate continuously with the output shaft 31 and the motor 3. At this time, under the limiting action of the helical ring 35 on the helical gear 32, the rotation of the helical gear 32 generates an upward axial force on itself. Further, this part of the acting force drives the helical gear 32, the output shaft 31, and the motor 3 as a whole to rise. During this process, the second bevel gear 33 rises synchronously, causing the positioning ring 34 to shrink back into the second bevel gear 33. At this time, the second bevel gear 33 disengages from the two first bevel gears 24, and the movement interference between the two first bevel gears 24 is released and they are independent of each other.

[0061] When the meshing between the second bevel gear 33 and the two first bevel gears 24 is released, the transmission relationship between the driving mechanism and the lifting mechanism disappears, and the device cannot continue to rise after reaching the set height. At the same time, after the helical gear 32 rises, it meshes with the helical worm gear 36 and drives the helical worm gear 36 to rotate. The helical worm gear 36 further drives the unfolding mechanism to start the unfolding operation of the working platform. Embodiment 5:

[0062] Both of the two helical worm shafts 5 are meshed and transmission-connected with the helical worm gear 36, and the two helical worm shafts 5 are respectively located on the horizontal longitudinal sides of the helical worm gear 36. Both ends of the helical worm shaft 5 are fixedly connected with a rotating lead screw 51. A threaded cylinder 52 is screwed on the outer contour of the rotating lead screw 51. The threaded cylinders 52 on the same horizontal side are fixedly connected with the same extension plate 53.

[0063] The thread directions of the rotating lead screws 51 on the two horizontal sides are set to be opposite. The threaded cylinders 52 and the extension plates 53 both penetrate and are connected to the inside of the top plate 15 with limited sliding.

[0064] As can be seen from Embodiment 4, after the helical gear 32 meshes with the helical worm gear 36, the unfolding mechanism starts to work. Since both the helical worm gear 36 and the helical worm 5 adopt helical designs, by setting the helix angle of the helical worm 5 to be greater than the friction angle between the helical worm 5 and the helical worm gear 36, the motion transmission from the helical worm gear 36 to the helical worm 5 can be achieved. Moreover, the larger the ratio between the helix angle and the friction angle, the lower the transmission loss during the motion transmission from the helical worm gear 36 to the helical worm 5. At this time, the rotation of the helical worm gear 36 drives the two helical worms 5 to rotate synchronously, and the helical worms 5 further drive the rotating lead screws 51 to rotate synchronously. At this time, the threaded barrel 52 has a tendency to rotate synchronously with the rotating lead screw 51. However, since the threaded barrels 52 on the same side of the horizontal transverse direction are fixedly connected by the extension plates 53, and both the threaded barrel 52 and the extension plate 53 penetrate and slide inside the top plate 15, the threaded barrel 52 cannot rotate under the limitation of the extension plate 53 and the top plate 15.

[0065] Furthermore, under the screwing action of the rotating lead screw 51, the threaded barrel 52 extends along the axial direction of the rotating lead screw 51. Since the thread helix directions of the rotating lead screws 51 on both sides of the horizontal transverse direction are set in opposite directions, that is, the threaded barrels 52 on both sides move away from each other, thereby driving the two extension plates 53 to extend out of the inside of the top plate 15. The extended extension plates 53 and the top plate 15 together form a working platform for personnel to work at high altitudes.

[0066] It should be noted that due to the self-locking property of the screwing relationship between the rotating lead screw 51 and the threaded barrel 52, the extension plate 53 can also achieve a self-locking function during the process of extending out of the inside of the top plate 15, thereby effectively avoiding the abnormal contraction of the extension plate 53 when subjected to external extrusion, which may cause safety hazards for personnel working at high altitudes.

[0067] When the extension plate 53 extends to the limit distance or abuts against the wall, the helical worm 5 and the helical worm gear 36 are locked synchronously. At this time, the device reaches the set unfolding state, and the motor 3 automatically shuts down; when the device needs to be reset, the motor 3 is started and drives the output shaft 31 and the helical gear 32 to reverse. At this time, since the helical gear 32 is in a meshing state with the helical worm gear 36, the helical worm gear 36 reverses synchronously and drives the extension plate 53 to gradually contract back into the inside of the top plate 15; subsequently, when the extension plate 53 contracts back to the limit position, the helical worm gear 36 is locked, causing an axial force downward on the helical gear 32 and driving the helical gear 32, the motor 3, and the motor 3 to descend synchronously. During this process, the second bevel gear 33 descends synchronously and re-engages with the two first bevel gears 24, and after the helical gear 32 descends, it meshes and drives with the helical ring gear 35. The helical ring gear 35 follows the helical gear 32 and drives the second bevel gear 33 to reverse synchronously. Furthermore, the reverse rotation of the two first bevel gears 24 causes the feed screw 21 to start to reset, and the height of the device starts to decrease and finally resets to the initial folded state.

[0068] On the other hand, due to the transmission relationship between the helical worm gear 36 and the helical worm 5 having the characteristic of a high reduction ratio, the rotation speed of the helical worm 5 is relatively slow, thereby realizing the slow extension of the extension plate 53 from inside the top plate 15, which further facilitates the accurate control of the deployment area of the work platform by the personnel.

[0069] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A building construction support device for construction engineering, comprising a bottom plate (1), a driving mechanism, a lifting mechanism, a limiting mechanism and an unfolding mechanism, characterized in that: Both sides of the upper surface of the bottom plate (1) are fixedly connected to a fixing seat 1 (11), the fixing seat 1 (11) is rotatably connected to a bracket 1 (12) via a pin shaft, the middle section of the bracket 1 (12) is rotatably connected to a bracket 2 (13) via a pin shaft, the top end of the bracket 2 (13) is rotatably connected to a fixing seat 2 (14) via a pin shaft, the top end of the fixing seat 2 (14) is commonly fixedly connected to a top plate (15), and one side of the top plate (15) is fixedly connected to a level (16); the driving mechanism includes a motor (3) as a power source for the device, and also includes a through The motor (3) passes through and is connected to the lifting mechanism in an intermittent transmission manner. The lifting mechanism comprises a positioning frame (2) fixedly connected to the horizontal horizontal mirror image of the middle section of the lower surface of the top plate (15) on both sides. The limiting mechanism comprises a lever (4) arranged horizontally and longitudinally, one end of the lever (4) extends into the interior of the positioning frame (2) and the other end extends to the outside of the top plate (15). The unfolding mechanism comprises two helical worm gears (5) connected to the driving mechanism in a transmission manner, and the helical worm gears (5) are connected to the interior of the top plate (15) on both sides in a horizontal longitudinal direction in a limited rotation manner. The interior of the positioning frame (2) is penetrated by a feed screw (21) and is connected to a limited rotation. A slider (22) is screwed on the outer contour of the feed screw (21) and the slider (22) slides within the positioning frame (2). The bottom ends of the opposite surfaces of the two positioning frames (2) are fixedly connected to a common connecting frame (23). One end of the feed screw (21) pointing to the opposite surfaces of the two positioning frames (2) extends out of the interior of the positioning frame (2) and is fixedly connected to a bevel gear (24). Both ends of the slider (22) in the horizontal and longitudinal directions are fixedly connected to positioning rods (25). The output end of the motor (3) is fixedly connected to an output shaft (31) and the output shaft (31) passes through the feed screw (21); the top end of the output shaft (31) is fixedly connected to a bevel gear (32); the outer contour of the bevel gear (32) is meshingly connected to a bevel gear ring (35); the bevel gear ring (35) is half-penetrated and limitedly rotatably connected to the center of the lower surface of the top plate (15); the bottom end of the bevel gear ring (35) is fixedly connected to a positioning ring (34); the outer contour of the middle section of the output shaft (31) is penetrated and limitedly rotatably connected to a bevel gear 2 (33); the bevel gear 2 (33) is connected to the positioning ring (34) via a spline transmission; the lower surface of the bevel gear 2 (33) is intermittently meshingly connected to the bevel gear 1 (24); Both ends of the helical worm (5) are fixedly connected to a rotating screw (51), a threaded barrel (52) is screwed onto the outer contour of the rotating screw (51), and the threaded barrels (52) on the same side in the horizontal direction are fixedly connected to the same extension plate (53); The two helical worm gears (5) are both meshingly connected to the helical worm wheel (36) for transmission, and the two helical worm gears (5) are respectively located on both sides of the helical worm wheel (36) in the horizontal longitudinal direction.

2. The construction support device for construction engineering according to claim 1, wherein: The positioning rod (25) penetrates and is rotationally connected to the top end of the first bracket (12) at the corresponding position in a limited manner.

3. The construction support device for construction engineering according to claim 2, characterized in that: The helical worm gear (36) and the output shaft (31) are coaxially arranged.

4. A building construction support device for construction engineering according to claim 3, characterized in that: One end of the shift lever (4) extending into the positioning frame (2) is fixedly connected with a positioning frame (41). The positioning frame (41) is penetrated and slidably connected with a guide rail (42). The guide rail (42) is fixedly connected with the positioning frame (2). A ratchet rack (43) is fixedly connected to the side of the guide rail (42) away from the shift lever (4), and the ratchet rack (43) is mutually engaged with the inner wall of the positioning frame (41). A holding spring (44) is fixedly connected to the side of the inner wall of the positioning frame (41) close to the shift lever (4). The other end of the holding spring (44) is fixedly connected with a pressing ring (45), and the pressing ring (45) abuts against the outer surface of the guide rail (42).

5. The building construction support device for construction engineering according to claim 4, characterized in that: The thread rotation directions of the rotating lead screws (51) on the horizontal left and right sides are opposite. The thread barrel (52) and the extension plate (53) both penetrate and are slidably connected to the inside of the top plate (15) in a limited manner.

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