Building construction supporting device for building engineering

Abstract

The building construction supporting device for building engineering comprises a bottom plate, a driving mechanism, a lifting mechanism, a limiting mechanism and an unfolding mechanism, first fixing seats are fixedly connected to the two horizontal and transverse sides of the upper surface of the bottom plate correspondingly, and first supports are rotationally connected to the first fixing seats through pin shafts correspondingly; the middle sections of the first supports are rotationally connected with second supports through pin shafts, the top ends of the second supports are rotationally connected with second fixing bases through pin shafts, the top ends of the second fixing bases are jointly and fixedly connected with the same top plate, and the horizontal longitudinal side of the top plate is fixedly connected with a gradienter. By arranging the lifting mechanism, synchronous lifting of the device is achieved, and meanwhile single-side lifting operation can be further achieved through cooperation with the driving mechanism; by arranging the limiting mechanism, the maximum lifting height of the device can be freely controlled; and by arranging the unfolding mechanism, automatic switching is achieved after the device reaches the maximum lifting height, and the platform unfolding operation is completed.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a building construction support device for construction engineering. Background Art

[0002] In construction projects, support devices are a key construction equipment that is mainly used to provide stability and safety during the construction process, especially in high-rise buildings, underground projects and complex construction environments. Traditional construction support devices mostly rely on temporary structural supports, which not only require a lot of manpower and time to build and dismantle, but are also prone to structural instability.

[0003] After searching, the Chinese patent with publication number CN118407588B includes a base plate; support columns fixedly connected to the upper surface of the base plate around the four sides; a support plate, a storage cavity on both sides of the support plate, an extension plate movably connected to the storage cavity through a first slide rod, a first return spring is also sleeved on the outer side of the first slide rod, and slots are evenly spaced on the front end surface of the extension plate; and an extension reinforcement assembly, including a second screw rod connected to both sides of the lower surface of the support plate along the lateral rotation, a movable column movably connected to the lower surface of the support plate, an L-shaped frame fixedly connected to one side of the movable column, and a reinforcement plate movably connected above the lateral support arm of the L-shaped frame. In the above patent, the extension plate is supported by the L-shaped frame and the reinforcement plate to enhance its stability, and a protective rope and a pedal are used to prevent construction workers from falling from a height.

[0004] However, in the above scheme, the extension plate and the support plate together form a working platform for personnel to work at high altitudes, and the extension plate and the support plate always remain parallel to the base plate. However, the horizontal angle of the base plate is limited by the ground conditions and the lifting height of the support block adjusted by personnel. When the ground has a slope, the working platform is also in a tilted state, resulting in risks for personnel working at high altitudes. When controlling the lifting height of the support block to adjust the angle of the working platform, it is necessary to overcome the overall gravity lifting of the device, which makes the adjustment process obstructed and makes it difficult to intuitively judge the horizontal state of the working platform. On the other hand, in the process of building the above scheme, many parts need to be manually controlled and adjusted, which makes the deployment steps more cumbersome. It also requires a lot of manpower and time to build or disassemble, and it is difficult to meet the needs of rapid response, resulting in limited application scenarios of the device. Summary of the invention

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

[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; 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; 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; 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; 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.

[0007] 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.

[0008] Preferably, the positioning rod passes through and is rotationally connected to the top end of the bracket 1 at the corresponding position.

[0009] 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.

[0010] 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.

[0011] Preferably, one end of the lever extending into the interior of the positioning frame is fixedly connected to a positioning frame, the positioning frame is penetrated by and slidably connected to a guide rail, the guide rail is fixedly connected to the positioning frame, a side of the guide rail away from the lever is fixedly connected to a ratchet bar, and the ratchet bar and the inner wall of the positioning frame are clamped together, a side of the inner wall of the positioning frame close to the lever is fixedly connected to a holding spring, the other end of the holding spring is fixedly connected to a pressing ring, and the pressing ring is held against the outer surface of the guide rail.

[0012] Preferably, the two helical worms are meshingly connected to the helical worm wheel and are respectively located on both sides of the horizontal longitudinal direction of the helical worm wheel. Both ends of the helical worm are fixedly connected to a rotating screw, and a threaded barrel is screwed on the outer contour of the rotating screw. The threaded barrels on the same side in the horizontal transverse direction are commonly fixedly connected to the same extension plate.

[0013] Preferably, the thread rotation directions of the rotating screw rods on both horizontal and lateral sides are opposite, and the threaded barrel and the extension plate are both penetrated and limitedly slidably connected to the inside of the top plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a lifting mechanism to achieve synchronous lifting of the device, and further cooperates with the driving mechanism to achieve unilateral lifting operation, thereby adjusting the horizontal angle of the working platform to reduce the risk of personnel working at height.

[0015] 2. The present invention can freely control the maximum lifting height of the device by setting a limit mechanism, and cooperate with the driving mechanism to complete the switching of the working mode.

[0016] 3. The present invention is provided with an unfolding mechanism, which automatically switches and completes the platform unfolding operation after the device reaches the maximum lifting height. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a cross-sectional view of the main structure of the present invention; Figure 3 This is a schematic diagram of the base frame of the present invention; Figure 4 It is a schematic diagram of the lifting mechanism of the present invention; Figure 5 It is a schematic diagram of the limiting mechanism of the present invention; Figure 6 It is a partial cross-sectional view of the driving mechanism of the present invention; Figure 7 An exploded view of the driving mechanism of the present invention; Figure 8 It is a schematic diagram of the deployment mechanism of the present invention; Fig. 9It is the overall workflow diagram of the present invention.

[0018] 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

[0019] 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:

[0020] 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; 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; 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; 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; 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.

[0021] 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.

[0022] 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.

[0023] 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:

[0024] 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.

[0025] The positioning rod 25 penetrates and is rotationally connected to the top end of the bracket 12 at the corresponding position.

[0026] It can be seen from Example 1 that in the initial state, the driving mechanism is meshed with the lifting mechanism. At this time, the driving mechanism works and drives the two bevel gears 24 to rotate synchronously. The bevel gear 24 further drives the feed screw 21 to rotate. At this time, the slider 22 tends to rotate synchronously with the feed screw 21, but because the slider 22 is limited to slide inside the positioning frame 2, that is, under the matching limit of the positioning frame 2 and the top plate 15, the slider 22 cannot rotate. At this time, under the screw connection of the feed screw 21, the slider 22 begins to move along the axial direction of the feed screw 21.

[0027] Since the lifting mechanism is mirrored on both sides of the middle section of the lower surface of the top plate 15, that is, the rotation directions of the two feed screws 21 are opposite, the movement directions of the two sliders 22 are also opposite. As the driving mechanism is started, the two sliders 22 move away from each other.

[0028] When the slider 22 moves axially along the feed screw 21, it drives the positioning rod 25 to move synchronously, and the positioning rod 25 further pulls the top end of the bracket 12 to move synchronously. Since the bottom end of the bracket 12 is fixed by the fixed seat 11 and the bottom plate 1, the bracket 12 begins to deflect along the fixed seat 11 along with the movement of the slider 22. The deflection of the bracket 12 causes its projection height in the vertical direction to increase synchronously, thereby driving the top plate 15 on the corresponding side to rise. When the driving mechanism is engaged with the lifting mechanism, the two sliders 22 move synchronously, that is, the two sides of the top plate 15 rise synchronously, thereby completing the height expansion operation of the device; when the bracket 12 is deflected to a position close to the vertical position, the device is expanded to the maximum height.

[0029] It should be noted that during the deflection of bracket 12, it drives bracket 2 13 to deflect synchronously. When a person stands on the upper surface of the top plate 15, the main force point of the device after unfolding is located at the screw connection between the slider 22 and the feed screw 21. Since the screw connection has a self-locking characteristic, the height adjustment process of the device also achieves self-locking. At this time, the displacement of the center of gravity of the device caused by the activities of the person on the upper surface of the top plate 15 will not cause the height of the device to change, thereby effectively ensuring the safety of the personnel working at high altitudes; further, through the triangular support formed by bracket 2 13 and bracket 1 12, the load stress on the top of bracket 12 is effectively dispersed to the two ends of bracket 12 and bracket 2 13, thereby avoiding stress concentration and causing structural fracture and instability.

[0030] On the other hand, after the slider 22 moves to the maximum stroke along the feed screw 21, the slider 22 cannot move further, causing the feed screw 21 to be locked. Furthermore, at this time, the bevel gear 24 is also locked and cannot rotate with the drive mechanism. The drive mechanism begins to switch to disengage the meshing transmission between it and the bevel gear 24 and begins to mesh with the unfolding mechanism. Then the drive mechanism drives the unfolding mechanism to complete the unfolding operation of the device working platform.

[0031] It should be noted that due to the uncertainty of the working position, in some cases it is necessary to unfold the device on a sloped 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 to synchronize the slope of the ground, the two sides of the top plate 15 are simultaneously raised and are also in an inclined state, which poses a safety hazard to personnel working at high altitudes.

[0032] Therefore, after the device completes the lifting and deployment operation on the slope, it is necessary to adjust the lifting mechanism at the corresponding position to unilaterally lift the lower side of the top plate 15, so as to further ensure the horizontal state of the top plate 15; because after the device completes the lifting and deployment, the driving mechanism is disengaged from the lifting mechanism, and at this time the two bevel gears 24 can be freely rotated by manual control under the action of external force, and at this time there is no interference between the rotation of the two bevel gears 24, so that the positioning rod 25 on the lower side of the top plate 15 is rotated to achieve unilateral lifting and then complete the angle adjustment process of the top plate 15.

[0033] When the positioning rod 25 on the lower side is rotated, the feed screw 21 at the corresponding position moves again to further expand the vertical height of the corresponding side bracket 12, while the other side maintains its overall height due to the self-locking characteristics between the feed screw 21 and the slider 22. That is, at this time, the top plate 15 deflects around the connection between the higher side fixed seat 2 14 and the bracket 2 13, thereby achieving angle adjustment of the top plate 15 to ensure its horizontal state. Embodiment three:

[0034] One end of the lever 4 extending into the positioning frame 2 is fixedly connected to a positioning frame 41, and a guide rail 42 is penetrated and slidably connected to the positioning frame 41. The guide rail 42 is fixedly connected to the positioning frame 2, and a ratchet bar 43 is fixedly connected to the side of the guide rail 42 away from the lever 4, and the ratchet bar 43 and the inner wall of the positioning frame 41 are mutually engaged, and a supporting spring 44 is fixedly connected to the side of the inner wall of the positioning frame 41 close to the lever 4, and the other end of the supporting spring 44 is fixedly connected to a pressing ring 45, and the pressing ring 45 is pressed against the outer surface of the guide rail 42.

[0035] It can be seen from Example 2 that when the slider 22 moves along the feed screw 21 to the maximum stroke, the lifting mechanism stops working, and the device reaches the maximum unfolding height. Therefore, by controlling the maximum stroke of the feed screw 21 on the feed screw 21, the unfolding height of the device can be freely adjusted.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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:

[0040] 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.

[0041] The driving mechanism further includes a helical worm gear 36 penetrating through and rotatably connected to the interior of the top plate 15 , and the helical worm gear 36 is coaxially arranged with the output shaft 31 .

[0042] It can be seen from Example 3 that the driving mechanism is meshed with the lifting mechanism in the initial state, that is, the bevel gear 32 is located inside the bevel gear ring 35 and meshes with the bevel gear ring 35 for transmission, and at the same time, the bevel gear 2 33 meshes with the two bevel gears 1 24 for transmission. At this time, the motor 3 is started and drives the output shaft 31 and the bevel gear 32 to rotate, and the bevel gear 32 further drives the bevel gear ring 35 and the positioning ring 34 to rotate synchronously. Since the bevel gear 2 33 and the positioning ring 34 are connected by a spline transmission, that is, the bevel gear 2 33 rotates synchronously, the rotation of the bevel gear 2 33 drives the two bevel gears 1 24 to rotate synchronously and the rotation directions of the two bevel gears 1 24 are opposite. Further, it can be seen from the movement process of Example 2 that at this time, the device begins to rise and unfold.

[0043] When the device rises to the set height, the two bevel gears 1 24 are in a locked state and the bevel gear 2 33 is also unable to rotate. At this time, the bevel gear 2 33, the positioning ring 34 and the helical gear ring 35 are all locked and cannot rotate, while the bevel gear 32 continues to rotate with the output shaft 31 and the motor 3. At this time, under the limiting effect of the helical gear ring 35 on the bevel gear 32, the rotation of the bevel gear 32 causes it to generate an upward axial force. Further, this part of the force drives the bevel gear 32, the output shaft 31 and the motor 3 to rise as a whole. In this process, the bevel gear 2 33 rises synchronously and causes the positioning ring 34 to shrink back into the inside of the bevel gear 2 33. At this time, the bevel gear 2 33 is disengaged from the two bevel gears 1 24, and the motion interference between the two bevel gears 1 24 is eliminated and they are independent of each other.

[0044] When the meshing between the bevel gear 2 33 and the two bevel gears 1 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, the bevel gear 32 rises and meshes with the bevel worm gear 36 to drive the bevel worm gear 36 to rotate, and the bevel worm gear 36 further drives the unfolding mechanism to start the unfolding operation of the working platform. Embodiment five:

[0045] The two helical worm gears 5 are meshed and transmission-connected with the helical worm wheel 36 and are respectively located on both sides of the horizontal longitudinal direction of the helical worm wheel 36. Both ends of the helical worm gears 5 are fixedly connected with a rotating screw 51. A threaded barrel 52 is screwed on the outer contour of the rotating screw 51. The threaded barrels 52 on the same side in the horizontal direction are commonly fixedly connected with the same extension plate 53.

[0046] The threaded directions of the rotating screw rods 51 on both sides are opposite to each other, and the threaded barrel 52 and the extension plate 53 are both penetrated and limitedly slidably connected to the inside of the top plate 15 .

[0047] It can be seen from the fourth embodiment that the unfolding mechanism starts to work after the helical gear 32 is meshed with the helical worm wheel 36. Since the helical worm wheel 36 and the helical worm 5 both adopt a helical gear design, the motion transmission from the helical worm wheel 36 to the helical worm 5 can be achieved 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 wheel 36. 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 wheel 36 to the helical worm 5. At this time, the rotation of the helical worm wheel 36 drives the two helical worms 5 to rotate synchronously, and the helical worm 5 further drives the rotating lead screw 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 barrel 52 on the same side of the horizontal lateral side is fixedly connected by the extension plate 53, and the threaded barrel 52 and the extension plate 53 both penetrate and slide inside the top plate 15, the threaded barrel 52 cannot rotate under the limit of the extension plate 53 and the top plate 15.

[0048] Furthermore, under the screw connection action of the rotating screw 51, the threaded tube 52 extends axially along the rotating screw 51. Since the thread rotation directions of the rotating screws 51 on both sides of the horizontal lateral direction are opposite, that is, the threaded tubes 52 on both sides are away from each other, thereby driving the two extension plates 53 to extend from the inside of the top plate 15. The extended extension plates 53 and the top plate 15 together constitute a working platform for personnel when working at high altitudes.

[0049] It should be noted that since the threaded connection between the rotating screw 51 and the threaded tube 52 is self-locking, the extension process of the extension plate 53 from the inside of the top plate 15 can also achieve a self-locking function, thereby effectively avoiding abnormal contraction of the extension plate 53 when squeezed by external force, causing safety hazards to personnel working at high altitudes.

[0050] When the extension plate 53 is extended to the limit distance or abuts against the wall, the helical worm 5 and the helical worm wheel 36 are locked synchronously, and the device reaches the set unfolded state, and the motor 3 is automatically turned off; when the device needs to be reset, the motor 3 is started and the output shaft 31 and the helical gear 32 are driven to reverse, and the helical gear 32 and the helical worm wheel 36 are in meshing state, causing the helical worm wheel 36 to reverse synchronously and drive the extension plate 53 to gradually retract back into the top plate 15; then when the extension plate 53 is retracted back to the limit position, the helical worm wheel 36 is locked, causing the helical gear 32 to generate a downward axial force and drive the helical gear 32, the motor 3 and the motor 3 to descend synchronously, during which the bevel gear 2 33 synchronously descends and re-engages with the two bevel gears 1 24, and the bevel gear 32 descends and meshes with the bevel gear ring 35 for transmission, the bevel gear ring 35 accompanies the bevel gear 32 and drives the bevel gear 2 33 to reverse synchronously, further, the reversal of the two bevel gears 1 24 causes the feed screw 21 to begin to reset, the height of the device begins to decrease and is finally reset to the initial folded state.

[0051] On the other hand, since the transmission relationship between the helical worm wheel 36 and the helical worm 5 has the characteristic of a high reduction ratio, the rotation rate of the helical worm 5 is relatively slow, so that the extension plate 53 can be slowly extended from the inside of the top plate 15, further facilitating personnel to accurately control the deployment area of ​​the working platform.

[0052] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction support device for a construction project, comprising a base 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), and 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, and the top of the bracket 2 (13) is rotatably connected to a fixing seat 2 (14) via a pin shaft. The top 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 device as an A motor (3) is provided as a power source, the motor (3) penetrates and is intermittently transmission-connected to the lifting mechanism; the lifting mechanism comprises a positioning frame (2) fixedly connected to both sides of the horizontal horizontal mirror image of the middle section of the lower surface of the top plate (15); 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) transmission-connected to the driving mechanism, and the helical worm gears (5) are rotationally connected to the interior of both sides of the horizontal longitudinal direction of the top plate (15) in a limited position.

2. A construction support device for construction engineering according to claim 1, characterized in that: A feed screw (21) is penetrated through the interior of the positioning frame (2) and is connected to it 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 ends of the slider (22) in the horizontal and longitudinal directions are fixedly connected to positioning rods (25).

3. A construction support device for construction engineering according to claim 2, characterized in that: The positioning rod (25) passes through and is rotationally connected to the top end of the bracket 1 (12) at the corresponding position.

4. A construction support device for construction engineering according to claim 1, characterized in that: 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) through a spline transmission; the lower surface of the bevel gear 2 (33) is intermittently meshingly connected to the bevel gear 1 (24).

5. A construction support device for construction engineering according to claim 4, characterized in that: The driving mechanism further comprises a helical worm gear (36) penetrating through and connected to the interior of the top plate (15) for limited rotation, and the helical worm gear (36) and the output shaft (31) are arranged coaxially.

6. A construction support device for construction engineering according to claim 1, characterized in that: One end of the lever (4) extending into the interior of the positioning frame (2) is fixedly connected to a positioning frame (41); a guide rail (42) is penetrated and slidably connected to the positioning frame (41); the guide rail (42) is fixedly connected to the positioning frame (2); a ratchet bar (43) is fixedly connected to the side of the guide rail (42) away from the lever (4); the ratchet bar (43) and the inner wall of the positioning frame (41) are mutually engaged; a holding spring (44) is fixedly connected to the side of the inner wall of the positioning frame (41) close to the lever (4); the other end of the holding spring (44) is fixedly connected to a pressing ring (45); and the pressing ring (45) is held against the outer surface of the guide rail (42).

7. A construction support device for construction engineering according to claim 1, characterized in that: The two helical worms (5) are meshed and transmission-connected with the helical worm wheel (36), and the two helical worms (5) are respectively located on both sides of the helical worm wheel (36) in a horizontal longitudinal direction. Both ends of the helical worms (5) are fixedly connected to a rotating screw (51), a threaded barrel (52) is screwed on the outer contour of the rotating screw (51), and the threaded barrels (52) on the same side in a horizontal lateral direction are fixedly connected to the same extension plate (53).

8. A construction support device for construction engineering according to claim 7, characterized in that: The threaded directions of the rotating screw rods (51) on both sides are opposite to each other, and the threaded barrel (52) and the extension plate (53) are both passed through and are limitedly slidably connected to the inside of the top plate (15).

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