Liftable support for building engineering construction

Abstract

The utility model discloses a liftable bracket for constructional engineering construction, which belongs to the technical field of constructional engineering and is mainly used for transporting materials. The liftable support for building engineering construction comprises a first installation frame and a second installation frame, a first driving mechanism and a second driving mechanism are arranged on the installation frames, the output ends of the driving mechanisms are connected with lifting ropes, the lifting ropes are connected with a placing mechanism, and the placing mechanism is connected with a lifting mechanism. A motor of the first driving mechanism drives a first winding wheel to rotate and drives a first connecting rod and a first gear to rotate, the first gear drives a second gear meshed with the first gear to rotate, and the second gear drives a second connecting rod and a second winding wheel to rotate; through the first gear and the second gear which are meshed with each other, one motor drives the two containing mechanisms to move up and down, the power driving cost is saved, the two containing mechanisms are opposite in movement direction, the containing mechanisms at different positions can be loaded and unloaded, and the material conveying efficiency is improved.

Description

Technical Field

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

[0002] In the process of construction engineering, in order to facilitate the operation, it is often necessary to lift the bricks, stones, steel bars and other materials used in the construction to a high place. Therefore, certain lifting devices are used in the current construction sites to transport the materials to a high place.

[0003] However, the existing lifting brackets for construction engineering, such as the Chinese patent with publication number CN220522043U, disclose a lifting bracket for construction engineering, including a base, a support rod, a side plate, a baffle, a support frame, a connecting frame, a lifting rope, a roller, a mounting plate and a guide rod; the support rod is connected to the base, the mounting plate is connected to the support rod, the guide rod is connected to the mounting plate and the base, the support frame is provided with a slider, the slider is slidably connected to the guide rod, the support frame is provided with an anti-fall assembly, and the anti-fall assembly is cooperatively connected to the support rod; the side plate is connected to the support frame, and the baffle is rotatably connected to the support frame; the connecting frame is connected to the support frame, the mounting plate is provided with a mounting seat a, the roller is rotatably connected to the mounting seat a, the mounting plate is provided with a winding assembly, the lifting rope is connected to the connecting frame, and the lifting rope is pressed The tightening roller, the lifting rope and the winding assembly are connected in cooperation; although it can achieve the purpose of lifting materials normally, and is also provided with an anti-fall assembly, the anti-fall assembly will not block the rise and prevent falling during the rising process of the support frame, play a protective role and reduce safety hazards; both can achieve the purpose of lifting materials, but each lifting bracket is only provided with a device that can be used to lift construction materials, namely the lifting mechanism, and the transportation efficiency is low when in use. Although the transportation efficiency can be improved by simultaneously setting up two lifting brackets for construction engineering, both lifting brackets need to be provided with corresponding driving devices, which increases the number of driving devices and increases the cost. In addition, the space required for simultaneously setting up two lifting brackets is large, which may not be suitable for all construction sites. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a lifting bracket for construction engineering, which is mainly used for transporting materials to a construction height, so that one driving mechanism drives two lifting mechanisms at the same time, thereby saving costs and improving the material transportation efficiency.

[0005] The utility model discloses a lifting bracket for construction engineering construction, comprising a first mounting frame and a second mounting frame, a first driving mechanism is provided on the top of the first mounting frame, a second driving mechanism is provided on the top of the second mounting frame, an output end of the first driving mechanism and an output end of the second driving mechanism are both connected with a lifting rope, and a placing mechanism is provided under the lifting rope; the first mounting frame and the second mounting frame are arranged side by side, the first driving mechanism comprises a motor and a first winding wheel, the lifting rope is wound around the first winding wheel, the output end of the motor is connected to the first winding wheel for transmission, a first connecting rod connected to the first winding wheel for transmission is penetrated at one end of the first winding wheel away from the motor, a first gear is fixedly provided at one end of the first connecting rod away from the first winding wheel, and the centers of the first winding wheel, the first connecting rod and the first gear are located in the same straight line; The second driving mechanism includes a second winding wheel, the lifting rope is wound on the first winding wheel, one end of the second winding wheel is penetrated by a second connecting rod which is transmission-connected to the second winding wheel, the end of the second connecting rod away from the second winding wheel is provided with a second gear, the centers of the second winding wheel, the second connecting rod and the second gear are located in the same straight line; the second gear is meshed with the first gear for transmission; the second connecting rod includes a fixing rod, a guide rod and a locking piece, one end of the fixing rod is transmission-connected to the second winding wheel, the other end of the fixing rod is slidingly provided with a guide rod, and the end of the guide rod away from the second winding wheel is fixedly connected to the second gear, the fixing rod is provided with a first fixing hole which is opened along the radial direction of the fixing rod and passes through the fixing rod, the guide rod is provided with a second fixing hole which is opened along the radial direction of the guide rod and passes through the guide rod, and the locking piece passes through the first fixing hole and the second fixing hole in sequence.

[0006] Furthermore, the first fixing hole is a threaded hole, the locking member is a screw rod, and the screw rod passes through the second fixing hole and is threadedly connected to the first fixing hole.

[0007] Furthermore, the first mounting frame and the second mounting frame are rotatably connected with the height direction of the first mounting frame as the axis, and a rotatable connection device connected to the second mounting frame is provided on the side of the first mounting frame close to the second mounting frame. The rotatable connection devices are multiple and are evenly arranged on the first mounting frame along the height direction of the first mounting frame.

[0008] As a preferred embodiment, the rotating connection device includes a first fixing plate and a second fixing plate, the first fixing plate is arranged on the first mounting bracket, the second fixing plate is arranged on the second mounting bracket, a first sleeve is arranged in the middle of the side of the first fixing plate, and second sleeves are arranged at both ends of the side of the second fixing plate, the first sleeve is located between the two second sleeves, the axes of the first sleeve and the second sleeve are located in the same straight line, a column is fixed in the first sleeve, the column extends toward the two ends of the first sleeve along the axial direction of the first sleeve, and the two ends of the column extend into the second sleeve and are rotatably connected to the second sleeve.

[0009] Furthermore, the placing mechanism includes a table top and a connecting plate, the table top is connected to the output end of the pulling rope, the connecting plate is vertically arranged at the end of the table top away from the lifting mechanism, the end of the table top away from the lifting mechanism is provided with a rotating shaft, the connecting plate is rotatably connected to the table top through the rotating shaft, the end of the connecting plate away from the table is provided with a mounting hole, the end of the table top away from the connecting plate is provided with a first threaded hole corresponding to the position of the mounting hole, and the first threaded hole is provided with a bolt that passes through the mounting hole and is threadedly connected to the first threaded hole.

[0010] Furthermore, the first mounting frame is provided with a first lifting guide mechanism, the first lifting guide mechanism includes a first slide rail and a first slider, the first slide rail is arranged on both sides of the first mounting frame, the first slider is slidably arranged in the first slide rail, and the placement mechanism is fixedly connected to the first slider; the second mounting frame is provided with a second lifting guide mechanism, the second lifting guide mechanism includes a second slide rail and a second slider, the second slide rail is arranged on both sides of the second mounting frame, the second slider is slidably arranged in the second slide rail, and the placement mechanism is fixedly connected to the second slider.

[0011] The beneficial effect of the utility model is that by setting a first gear and a second gear that mesh with each other, only one motor is needed to simultaneously drive the placement mechanisms on the first mounting frame and the second mounting frame to move up and down, thus saving the cost of power drive, and the movement directions of the placement mechanisms on the first mounting frame and the second mounting frame are opposite. When one of the placement mechanisms moves down, the other placement mechanism moves up, and construction workers can load and unload the placement mechanisms at different positions respectively, thereby improving the transportation efficiency of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : A schematic diagram of the structure of a lifting bracket for building construction provided by the utility model;

[0013] Figure 2 : Schematic diagram of the connection structure between the first mounting bracket and the second mounting bracket;

[0014] Figure 3: Schematic diagram of the structure after the first mounting frame and the second mounting frame are folded;

[0015] Figure 4 : Schematic diagram of the structure of the second connecting rod;

[0016] Figure 5 : Schematic diagram of the structure of the rotating connection device;

[0017] Reference numerals: 1-first mounting frame; 11-first driving mechanism; 111-first winding wheel; 112-first connecting rod; 113-first gear; 114-motor; 12-first lifting guide mechanism; 121-first slide rail; 122-first slider; 2-second mounting frame; 21-second driving mechanism; 211-second winding wheel, 212-second connecting rod; 2121-fixing rod; 2122-guide rod; 2123-locking member; 2124-first fixing hole; 2125-second fixing hole; 213-second gear; 22-second lifting guide mechanism; 221-second slide rail; 222-second slider; 3-lifting rope; 31-pulley frame; 4-placing mechanism; 41-table; 411-first threaded hole; 42-connecting plate; 421-mounting hole; 43-rotating shaft; 44-bolt; 5-rotating connecting device; 51-first fixing plate; 511-first sleeve; 512-column; 52-second fixing plate; 521-second sleeve. DETAILED DESCRIPTION

[0018] The utility model is further described below.

[0019] The utility model provides a lifting bracket for construction engineering, which is mainly used for transporting materials to a high construction site, including a first mounting frame 1 and a second mounting frame 2, wherein a first driving mechanism 11 is provided on the top of the first mounting frame 1, and a second driving mechanism 21 is provided on the top of the second mounting frame 2, and the output ends of the first driving mechanism 11 and the second driving mechanism 21 are both connected to a lifting rope 3, and a placing mechanism 4 is provided below the lifting rope 3; the first mounting frame 1 and the second mounting frame 2 are arranged side by side, and the first driving mechanism 11 includes a motor 114. and a first winding wheel 111, the pulling rope 3 is wound on the first winding wheel 111, the output end of the motor 114 is connected to the first winding wheel 111, the end of the first winding wheel 111 away from the motor 114 is penetrated by a first connecting rod 112 connected to the first winding wheel 111, the end of the first connecting rod 112 away from the first winding wheel 111 is fixed with a first gear 113, the centers of the first winding wheel 111, the first connecting rod 112 and the first gear 113 are located in the same straight line; the second driving mechanism 21 includes a second winding wheel 211, The pulling rope 3 is wound around the first winding wheel 111, and one end of the second winding wheel 211 is penetrated by a second connecting rod 212 which is transmission-connected to the second winding wheel 211, and the end of the second connecting rod 212 away from the second winding wheel 211 is provided with a second gear 213, and the centers of the second winding wheel 211, the second connecting rod 212 and the second gear 213 are located in the same straight line; the second gear 213 is meshed with the first gear 113 for transmission; the second connecting rod 212 includes a fixing rod 2121, a guide rod 2122 and a locking member 2123, and the fixing rod 2121 One end of the fixed rod 2121 is transmission connected to the second winding wheel 211, and a guide rod 2122 is slidably provided inside the other end of the fixed rod 2121. The end of the guide rod 2122 away from the second winding wheel 211 is fixedly connected to the second gear 213. The fixed rod 2121 is provided with a first fixing hole 2124 which is opened along the radial direction of the fixed rod 2121 and passes through the fixed rod 2121. The guide rod 2122 is provided with a second fixing hole 2125 which is opened along the radial direction of the guide rod 2122 and passes through the guide rod 2122. The locking piece 2123 passes through the first fixing hole 2124 and the second fixing hole 2125 in sequence.

[0020] like Figure 1-Figure 5As shown, the first mounting frame 1 and the second mounting frame 2 are arranged side by side and the two can be connected by welding, splicing or rotation to ensure that the relative positions of the two are always consistent; the first driving mechanism 11 on the first mounting frame 1, the first driving mechanism 11 includes a first winding wheel 111 and a motor 114, the pulling rope 3 is wound around the first winding wheel 111, and the first winding wheel 111 is driven to rotate by the motor 114 to drive the pulling rope 3 to be recovered and lowered, thereby controlling the up and down movement of the placing mechanism 4; a first connecting rod 112 is penetrated by the end of the first winding wheel 111 away from the motor 114 and is connected to the first winding wheel 111 in transmission. When the first winding wheel 111 rotates, the first connecting rod 112 rotates synchronously with the first winding wheel 111, and the first connecting rod 11 The first gear 113 is fixedly arranged at one end away from the first winding wheel 111; the second driving mechanism 21 comprises a second winding wheel 211, on which the pulling rope 3 is wound; a second connecting rod 212 is penetrated at one end of the second winding wheel 211 close to the first winding wheel 111, on which a second connecting rod 212 is provided, the second gear 213 is meshed with the first gear 113, and the second gear 213 is driven to rotate by the rotation of the first gear 113, thereby driving the second connecting rod 212 and the second winding wheel 211 to rotate, so as to realize the recovery or downward movement of the pulling rope 3 wound on the second winding wheel 211, and control the up and down movement of the placing mechanism 4; in order to facilitate the meshing and installation of the second gear 213 with the first gear 113, as shown in FIG. Figure 4As shown, the second connecting rod 212 includes a fixed rod 2121, a guide rod 2122 and a locking piece 2123. The fixed rod 2121 is transmission-connected to the second winding wheel 211. The guide rod 2122 is slidably arranged at the other end of the fixed rod 2121. The second gear 213 is arranged at one end of the guide rod 2122 away from the fixed rod 2121. The distance between the second gear 213 and the first gear 113 is controlled by sliding the guide rod 2122 so that the second gear 213 is meshed with the first gear 113. The locking piece 2123 is passed through the first fixing hole 2124 on the fixed rod 2121 and the second fixing hole 2125 on the guide rod 2122, so that the relative position between the guide rod 2122 and the fixed rod 2121 is fixed and no sliding occurs. When the first gear 113 rotates, the second gear 213 is driven to rotate, thereby driving the second winding wheel 211 to rotate. To drive the pulling rope 3 wound on the second winding wheel 211 to be recovered and moved downward, and then control the placement mechanism 4 set on the second mounting frame 2 to move up and down; and because the rotation directions of the first gear 113 and the second gear 213 are opposite, the movement directions of the placement mechanism 4 on the first mounting frame 1 and the placement mechanism 4 on the second mounting frame 2 are opposite, that is, when the placement mechanism 4 on the first mounting frame 1 moves upward, the placement mechanism 4 on the second mounting frame 2 moves downward. In this way, one motor 114 can drive the two placement mechanisms 4 to move up and down at the same time, saving the power drive cost and improving the transportation efficiency of materials. When the placement mechanism 4 on the first mounting frame 1 moves downward, the placement mechanism 4 on the second mounting frame 2 moves upward. The construction personnel can unload the materials on the second mounting frame 2 while loading the first mounting frame 1, thereby improving the transportation efficiency of materials. The above-mentioned placement mechanism 4 can adopt the existing support frame, baffle and other structures such as CN220522043U, a lifting bracket for construction engineering construction.

[0021] The above-mentioned locking piece 2123 can adopt an existing pin or vertical rod, as long as the position of the first fixing hole 2124 and the second fixing hole 2125 can be fixed. However, as a preferred method, in order to ensure the connection stability between the locking piece 2123 and the first fixing hole 2124 and prevent the locking piece 2123 from slipping, the first fixing hole 2124 is a threaded hole, and the locking piece 2123 is a screw, which passes through the second fixing hole 2125 and is threadedly connected to the first fixing hole 2124.

[0022] In order to save the floor space of the lifting bracket for building construction, it can be used in narrow places on the construction site, such as Figure 1-Figure 3As shown, the first mounting frame 1 and the second mounting frame 2 are rotatably connected with the height direction of the first mounting frame 1 as the axis, and a rotating connection device 5 connected to the second mounting frame 2 is provided on the side of the first mounting frame 1 close to the second mounting frame 2, and the rotating connection device 5 is multiple and evenly arranged on the first mounting frame 1 along the height direction of the first mounting frame 1; when encountering narrow terrain, the second mounting frame 2 can be pushed manually so that the second mounting frame 2 moves to one side through the rotating connection device 5, and the second mounting frame 2 is folded to the back of the first mounting frame 1, which can reduce the overall volume of the device, and then the first winding wheel 111 is driven to rotate by the motor 114 to drive the winding wheel 111 set in the first winding wheel 114 to rotate. The placement mechanism 4 on one mounting frame 1 moves up and down. When the placement mechanism 4 on the second mounting frame 2 needs to be used at the same time, a transmission belt can be set on the first gear 113 and the second gear 213 so that the second gear 213 rotates simultaneously with the rotation of the first gear 113. When the placement mechanism 4 on the first mounting frame 1 moves upward, the placement mechanism 4 on the second mounting frame 2 moves downward, thereby improving the material transportation efficiency and making the lifting bracket for construction suitable for narrow construction sites, that is, places where the length of the site cannot meet the requirements of setting up two lifting brackets at the same time, and the placement mechanisms 4 on the two mounting frames can be moved up and down without an additional driving mechanism, saving costs.

[0023] The above-mentioned rotating connection device 5 can adopt the existing rotating connection device similar to the one used for opening and closing the refrigerator door, but in order to facilitate the maintenance and replacement of the rotating connection device 5, as Figure 2 , Figure 5As shown, the rotating connection device 5 includes a first fixing plate 51 and a second fixing plate 52, the first fixing plate 51 is arranged on the first mounting frame 1, and the second fixing plate 52 is arranged on the second mounting frame. A first sleeve 511 is arranged in the middle of the side of the first fixing plate 51, and second sleeves 521 are arranged at both ends of the side of the second fixing plate 52. The first sleeve 511 is located between the two second sleeves 521, and the axes of the first sleeve 511 and the second sleeve 521 are located in the same straight line. A column 512 is fixed in the first sleeve 511, and the column 512 extends along the axial direction of the first sleeve 511 toward the two ends of the first sleeve 511, and the two ends of the column 512 It extends into the second sleeve 521 and is rotatably connected to the second sleeve 521; by respectively arranging the first fixing plate 51 and the second fixing plate 52 on the back sides of the first mounting frame 1 and the second mounting frame 2, the second mounting frame 2 can be rotated around the height direction of the first mounting frame 1 through the rotational cooperation of the first sleeve 511, the second sleeve 521 and the column 512. At the same time, since the first fixing plate 51 and the second fixing plate 52 can be detachably connected and arranged on the outside of the first mounting frame 1 and the second mounting frame 2, when it is found that the second mounting frame 2 cannot rotate smoothly relative to the first mounting frame 1, the first fixing plate 51 and the second fixing plate 52 can be directly replaced to ensure that it can rotate normally.

[0024] In order to further save the space occupied by the lifting bracket for building construction when not in use, Figure 1 , Figure 3As shown, the placing mechanism 4 includes a table 41 and a connecting plate 42, the table 41 is connected to the output end of the pulling rope 3, the connecting plate 42 is vertically arranged at the end of the table 41 away from the lifting mechanism, the end of the table 41 away from the lifting mechanism is provided with a rotating shaft 43, the connecting plate 42 is rotatably connected to the table 41 through the rotating shaft 43, the end of the connecting plate 42 away from the table is provided with a mounting hole 421, the end of the table 41 away from the connecting plate 42 is provided with a first threaded hole 411 corresponding to the position of the mounting hole 421, the first threaded hole 411 is provided with a bolt 44 that passes through the mounting hole 421 and is threadedly connected to the first threaded hole 411; by rotatably connecting the table 41 and the connecting plate 42, and by the rotating shaft 43 controls the angle at which the connecting plate 42 can rotate relative to the table 41. For details, reference can be made to the connection structure of the existing folding plate that can limit the rotation angle; when the placement mechanism 4 is needed to hold materials, the connecting plate 42 is rotated to a position perpendicular to the table 41 and fixed, and the materials can be placed on the connecting plate 42; when the placement mechanism 4 is not needed, the connecting plate 42 is rotated to a position that fits the table 41, and the bolt 44 is threadedly connected to the threaded hole set in the table 41 through the mounting hole 421 set in the connecting plate 42, so as to achieve the purpose of fixing the connecting plate 42 and the table 41, thereby reducing the floor space of the lifting bracket for construction when the placement mechanism 4 is not used, so that it is suitable for the case of a small construction site. And when only the corresponding mechanism on the first mounting frame 1 is used to lift the material, the second mounting frame 2 can be rotated to the back of the first mounting frame 1, and the placement mechanism 4 on the second mounting frame 2 can be folded to save the floor space of the entire lifting bracket for construction. Of course, in order to prevent the material from falling, a baffle can also be set on the side of the connecting plate 42.

[0025] To ensure that the placement mechanism 4 moves up and down smoothly under the pulling of the pulling rope 3, as Figure 1As shown, the first mounting frame 1 is provided with a first lifting guide mechanism 12, the first lifting guide mechanism 12 includes a first slide rail 121 and a first slider 122, the first slide rail 121 is arranged on both sides of the first mounting frame 1, the first slider 122 is slidably arranged in the first slide rail 121, and the placement mechanism 4 is fixedly connected to the first slider 122; the second mounting frame 2 is provided with a second lifting guide mechanism 22, the second lifting guide mechanism 22 includes a second slide rail 221 and a second slider 222, the second slide rail 221 is arranged on both sides of the second mounting frame 2, the second slider 222 is slidably arranged in the second slide rail 221, and the placement mechanism 4 is fixedly connected to the second slider 222; through The placing mechanism 4 arranged on the first mounting frame 1 is fixedly connected to the first slider 122, and the placing mechanism 4 arranged on the second mounting frame 2 is fixedly connected to the second slider 222, so that when the placing mechanism 4 moves up and down with the pulling rope 3, the left and right sides of the placing mechanism 4 can always maintain the same straight line without deviation through the first slider 122 or the second slider 222, and the first slider 122 can slide up and down along the first slide rail 121, so that the first slider 122 moves up and down together with the placing mechanism 4, and the second slider 222 can slide up and down along the second slide rail 221, so that the second slider 222 moves up and down together with the placing mechanism 4; thereby, the placing mechanism 4 can move up and down smoothly along with the pulling rope 3.

[0026] In order to prevent the pulling rope 3 from being worn on the first mounting frame 1 or the second mounting frame 2 , a pulley frame 31 for the pulling rope 3 to pass through is provided on the top of each of the first mounting frame 1 and the second mounting frame 2 .

Claims

1. A hoistable support for construction engineering, comprising a first mounting frame (1) and a second mounting frame (2), wherein a first driving mechanism (11) is provided on the top of the first mounting frame (1), and a second driving mechanism (21) is provided on the top of the second mounting frame (2), and the output ends of the first driving mechanism (11) and the second driving mechanism (21) are both connected to a pulling rope (3), and a placing mechanism (4) is provided below the pulling rope (3); characterized in that: The first mounting frame (1) and the second mounting frame (2) are arranged side by side, The first driving mechanism (11) comprises a motor (114) and a first winding wheel (111), the pulling rope (3) is wound around the first winding wheel (111), the output end of the motor (114) is connected to the first winding wheel (111) in a transmission manner, a first connecting rod (112) connected to the first winding wheel (111) is passed through the end of the first winding wheel (111) away from the motor (114), a first gear (113) is fixedly provided on the end of the first connecting rod (112) away from the first winding wheel (111), and the centers of the first winding wheel (111), the first connecting rod (112) and the first gear (113) are located in the same straight line; The second driving mechanism (21) comprises a second winding wheel (211), the pulling rope (3) is wound around the first winding wheel (111), one end of the second winding wheel (211) is penetrated by a second connecting rod (212) which is transmission-connected to the second winding wheel (211), the end of the second connecting rod (212) away from the second winding wheel (211) is provided with a second gear (213), the centers of the second winding wheel (211), the second connecting rod (212) and the second gear (213) are located in the same straight line; the second gear (213) is meshed with the first gear (113) for transmission; The second connecting rod (212) comprises a fixing rod (2121), a guide rod (2122) and a locking piece (2123); one end of the fixing rod (2121) is transmission-connected to the second winding wheel (211); the other end of the fixing rod (2121) is slidably provided with a guide rod (2122); one end of the guide rod (2122) away from the second winding wheel (211) is fixedly connected to the second gear (213); the fixing rod (2121) is provided with a first fixing hole (2124) which is opened along the radial direction of the fixing rod (2121) and passes through the fixing rod (2121); the guide rod (2122) is provided with a second fixing hole (2125) which is opened along the radial direction of the guide rod (2122) and passes through the guide rod (2122); and the locking piece (2123 passes through the first fixing hole (2124) and the second fixing hole (2125) in sequence.

2. A hoistable support for construction engineering as claimed in claim 1, characterized in that: The first fixing hole (2124) is a threaded hole, and the locking member (2123) is a screw rod, which passes through the second fixing hole (2125) and is threadedly connected to the first fixing hole (2124).

3. A hoistable support for construction engineering as claimed in claim 1, characterized in that: The first mounting frame (1) and the second mounting frame (2) are rotatably connected with the height direction of the first mounting frame (1) as an axis; a rotatable connection device (5) connected to the second mounting frame (2) is provided on a side of the first mounting frame (1) close to the second mounting frame (2); the rotatable connection devices (5) are multiple and are evenly arranged on the first mounting frame (1) along the height direction of the first mounting frame (1).

4. A hoistable support for construction engineering as claimed in claim 3, characterized in that: The rotatable connection device (5) comprises a first fixing plate (51) and a second fixing plate (52), wherein the first fixing plate (51) is arranged on the first mounting frame (1), and the second fixing plate (52) is arranged on the second mounting frame; a first sleeve (511) is arranged in the middle of the side of the first fixing plate (51), and second sleeves (521) are arranged at both ends of the side of the second fixing plate (52); the first sleeve (511) is located between the two second sleeves (521), and the axes of the first sleeve (511) and the second sleeve (521) are located on the same straight line; a column (512) is fixed in the first sleeve (511), and the column (512) extends along the axial direction of the first sleeve (511) toward both ends of the first sleeve (511), and both ends of the column (512) extend into the second sleeve (521) to be rotatably connected with the second sleeve (521).

5. The hoistable support for construction engineering as claimed in claim 1, characterized in that: The placing mechanism (4) comprises a table top (41) and a connecting plate (42), wherein the table top (41) is connected to the output end of the pulling rope (3), and the connecting plate (42) is vertically arranged at the end of the table top (41) away from the lifting mechanism. The end of the table top (41) away from the lifting mechanism is provided with a rotating shaft (43), and the connecting plate (42) is rotatably connected to the table top (41) through the rotating shaft (43). The end of the connecting plate (42) away from the table top (41) is provided with a mounting hole (421), and the end of the table top (41) away from the connecting plate (42) is provided with a first threaded hole (411) corresponding to the position of the mounting hole (421), and a bolt (44) is provided in the first threaded hole (411) and passes through the mounting hole (421) and is threadedly connected to the first threaded hole (411).

6. A hoistable support for construction engineering as claimed in claim 1, characterized in that: The first mounting frame (1) is provided with a first lifting guide mechanism (12), the first lifting guide mechanism (12) comprising a first slide rail (121) and a first slider (122), the first slide rail (121) being arranged on both sides of the first mounting frame (1), the first slider (122) being slidably arranged in the first slide rail (121), and the placement mechanism (4) being fixedly connected to the first slider (122); The second mounting frame (2) is provided with a second lifting guide mechanism (22), the second lifting guide mechanism (22) comprising a second slide rail (221) and a second slider (222), the second slide rail (221) being arranged on both sides of the second mounting frame (2), the second slider (222) being slidably arranged in the second slide rail (221), and the placement mechanism (4) being fixedly connected to the second slider (222).

Images