CN115127517A

CN115127517A - Adjustable laser measuring device for building engineering

Info

Publication number: CN115127517A
Application number: CN202210592320.5A
Authority: CN
Inventors: 亚胜东; 曹科方; 刘志伟; 刘宁; 张珂; 陈质朴; 张禹; 张静; 于晓英; 孙增强; 毕磊; 曹振中; 曹永阁; 卢婧; 杨杰; 蒋海; 康健; 于勇波; 魏胜强; 南荀文
Original assignee: Zhengzhou Construction Engineering Quality Inspection Co ltd
Current assignee: Zhengzhou Construction Engineering Quality Inspection Co ltd
Priority date: 2022-05-28
Filing date: 2022-05-28
Publication date: 2022-09-30
Anticipated expiration: 2042-05-28
Also published as: CN115127517B

Abstract

The invention provides an adjustable laser measuring device for construction engineering, which comprises a lifter, a lower lifting table and an upper lifting table, wherein the lower lifting table is connected with the lower lifting table through a height-adjustable lead screw assembly, guide rod assemblies which are symmetrically distributed and used for connecting the lower lifting table and the upper lifting table and are adjustable in height are arranged on two sides behind the lead screw assembly, the lead screw assembly is in meshing transmission with the lifter, an adjusting assembly is arranged on one side of the lifter, and the adjusting assembly is connected with a level gauge in a sliding mode. The lower lifting platform, the screw rod assembly, the guide rod assembly and the upper lifting platform are installed in place, the lower lifting platform is abutted to the ground, the upper lifting platform is abutted to the ceiling, the screw rod assembly and the guide rod assembly jointly form a vertical guide rail for connecting the ground and the ceiling, the lifter in meshing transmission with the screw rod assembly drives the level meter to lift along the guide rod assembly, the position can be flexibly adjusted, and the ground clearance of the level meter can be accurately controlled by controlling the lifter.

Description

Adjustable laser measuring device for building engineering

Technical Field

The invention belongs to the technical field of engineering measuring equipment, and particularly relates to an adjustable laser measuring device for constructional engineering.

Background

A level gauge (leveling instrument) is a laser measuring tool commonly used in construction surveying engineering, and is commonly used as a high-precision reference measuring instrument for measuring a tilt angle of a building relative to a horizontal position, flatness and straightness of a guide rail of machine tool equipment, a horizontal position and a vertical position of the building, and the like.

Spirit levels are generally used in two ways, ground and wall. In order to measure the levelness and the verticality of the high position of the building, the mounting seat is fixed on the wall body by using the cement steel nails in advance, and then the level gauge is mounted on the mounting seat. Therefore, in order to measure the related data of different heights, a plurality of mounting points need to be arranged on the wall, the process is complicated, the position of the level can not be flexibly adjusted after the level is fixed on the wall through bolts, and the ground clearance can not be accurately controlled. Because the mounting seat needs to be fixed through the cement steel nails, deep nail marks can be left on the wall body, and the attractiveness is seriously affected.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

Disclosure of Invention

Aiming at the defects pointed out in the background art, the invention aims to provide an adjustable laser measuring device for construction engineering, so as to solve the problem that the position of a level cannot be flexibly adjusted after the level is fixed on a wall by using a bolt.

In order to realize the purpose, the technical scheme of the invention is realized as follows:

the utility model provides an adjustable is laser surveying device for building engineering, includes next elevating platform, lift and upper elevating platform, next elevating platform is connected with next elevating platform through height-adjustable's lead screw subassembly, lead screw subassembly rear both sides are equipped with symmetric distribution be used for connecting next elevating platform and upper elevating platform and height-adjustable's guide bar subassembly, lead screw subassembly and lift meshing transmission are so that the lift along guide bar subassembly lift operation, lift one side is equipped with adjusting part, adjusting part sliding connection has the spirit level.

In a preferred embodiment, the upper lifting table and the lower lifting table are disposed in a vertically opposite manner and have the same structure, and the dimension of the lower lifting table is larger than that of the upper lifting table.

As a preferred technical scheme, the lower elevating platform includes host mounting panel, lower mounting panel and first lead screw, the lower mounting panel up end is located through the bearing frame to first lead screw, there is a servo motor first lead screw one end through the coupling joint, a servo motor locates the lower mounting panel through the support, the crane and the host mounting panel swing joint of lower mounting panel through cutting the fork formula, a servo motor is connected the drive through first lead screw and crane.

As a preferred technical scheme, the crane is equipped with the multiunit movable rod, the crane is articulated with last mounting panel through the movable rod of upper left end, the crane is through the movable rod of upper right end and last mounting panel sliding connection, the crane is articulated with next mounting panel through the movable rod of lower left end, the crane is through the movable rod of lower right end and next mounting panel sliding connection, first lead screw passes the movable rod of lower left end and the movable rod of lower right end, and the movable rod of lower left end is equipped with the through-hole, and the movable rod of lower right end is equipped with the screw with first lead screw looks interlock.

As a preferred technical scheme, a plurality of groups of equally distributed supporting seats are arranged on the lower end surface of the lower lifting platform and the upper end surface of the upper lifting platform.

As a preferred technical scheme, the supporting seat includes upper support column, spring and lower support column, upper support column passes through the lower terminal surface of bolt setting at lower elevating platform or the up end of upper elevating platform, lower support column upper end is equipped with the recess that is used for nested upper support column, lower support column lateral wall is equipped with the slotted hole that runs through the shaft and communicate the recess, upper support column lower extreme lateral wall is equipped with the shaft hole corresponding with the slotted hole, upper support column inlays in the recess and is connected with the current lower support column of pin that passes slotted hole and shaft hole, the spring housing offsets in the upper support column outside and with lower support column.

As a preferred technical scheme, the lift is including overlapping in the lead screw subassembly in order to carry out meshing driven turbine speed reducer, the turbine speed reducer bottom is equipped with the mounting panel, the mounting panel up end is equipped with the axle sleeve that supplies the guide bar subassembly to walk, mounting panel one side is equipped with second servo motor, second servo motor passes through the shaft coupling and is connected with turbine speed reducer's input shaft, the setting of adjusting part is at the opposite side of mounting panel.

As a preferred technical scheme, adjusting part is including locating the mounting panel lateral wall and being demountable installation's link, the link is equipped with the regulation cavity, the spirit level is sliding installation in the regulation cavity, be equipped with the second lead screw that passes the spirit level in the regulation cavity, swivelling joint is done with the regulation cavity inner wall to second lead screw one end, the second lead screw other end extends to the regulation cavity outside and is equipped with adjust knob.

As a preferred technical scheme, the lead screw subassembly includes upper lead screw and lower lead screw, upper lead screw passes through the bolt and sets up the lower terminal surface at upper elevating platform, lower lead screw passes through the bolt and sets up the up end of lower elevating platform, upper lead screw is connected with lower lead screw through the middle part lead screw that the same and end to end of several groups specification are in proper order, the guide bar subassembly includes upper guide bar and lower guide bar, upper guide bar passes through the bolt and sets up the lower terminal surface at upper elevating platform, lower guide bar passes through the upper end surface of bolt setting lower elevating platform, upper guide bar is connected with lower guide bar through the middle part guide bar that the same and end to end of several groups specification are in proper order, the upper end of middle part guide bar, middle part lead screw, lower lead screw and lower guide bar all is equipped with the slot, middle part guide bar, middle part lead screw, The lower ends of the upper lead screw and the upper guide rod are provided with connecting shafts corresponding to the slots.

As a preferable technical scheme, the total length of the middle guide rod and the middle screw rod is 600mm, and the length of the connecting shaft accounts for one third of the total length of the middle guide rod or the middle screw rod.

After the technical scheme is adopted, the invention has the beneficial effects that:

fixed connecting pieces such as steel nails and rivets are not needed, and the assembly can be freely disassembled and flexibly assembled; the lower lifting platform, the screw rod assembly, the guide rod assembly and the upper lifting platform are installed in place, the lower lifting platform is abutted to the ground, the upper lifting platform is abutted to the ceiling, the screw rod assembly and the guide rod assembly jointly form a vertical guide rail for connecting the ground and the ceiling, the lifter in meshing transmission with the screw rod assembly drives the level meter to lift along the guide rod assembly, the position can be flexibly adjusted, and the ground clearance of the level meter can be accurately controlled by controlling the lifter.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the lower lifting table.

Fig. 3 is a schematic structural view of the elevator.

Fig. 4 is a schematic structural view of the screw assembly and the guide bar assembly.

Fig. 5 is a schematic structural view of the support base.

In the figure: 1. a lower lifting platform, 2, a screw rod assembly, 3, a lifter, 4, an adjusting assembly, 5, a level gauge, 6, a guide rod assembly, 7, an upper lifting platform, 8, an upper mounting plate, 9, a lower mounting plate, 10, a kidney-shaped hole, 11, a lifting frame, 12, a movable rod, 13, a screw hole, 14, a first screw rod, 15, a bearing seat, 16, a support seat, 17, a first servo motor, 18, a middle guide rod, 19, a middle screw rod, 20, a slot, 21, a connecting shaft, 22, a second servo motor, 23, a mounting plate, 24, a turbine speed reducer, 25, a shaft sleeve, 26, a connecting frame, 27, a second screw rod, 28, an adjusting knob, 29, a top plate, 30, a bottom plate, 31, an upper screw rod, 32, a lower screw rod, 33, an upper guide rod, 34, a lower guide rod, 35, an upper support column, 36, a spring, 37, a lower support column, 38, a shaft hole, 39, a lower support column, a lower support column, a lower support column, a lower support column, a lower support column, a lower support column, a lower support column, a lower support column, a lower support column, A long round hole.

Detailed Description

Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

The following description is given with reference to the orientation words as shown in the drawings, and is not intended to limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "mounted" and "connected" are to be construed broadly, e.g., as being fixed or detachable or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

A level 5 is a laser measuring tool commonly used in construction surveying engineering, and is a high-precision reference measuring instrument commonly used for measuring a tilt angle of a building with respect to a horizontal position, flatness and straightness of a guide rail of a machine tool type device, a horizontal position and a vertical position of a building, and the like. In order to measure the levelness and the verticality of the high position of the building, the mounting seat is fixed on the wall body by using the cement steel nails in advance, and then the level 5 is mounted on the mounting seat. It can be seen that in order to measure the relevant data of different heights, a plurality of mounting points need to be arranged on the wall, the process is complicated, and the position of the level 5 cannot be flexibly adjusted after the level 5 is fixed on the wall through bolts. In order to solve the problem, the invention provides an adjustable laser measuring device for constructional engineering.

The laser measuring device is a combined measuring device and mainly comprises seven modules, namely a lower lifting table 1, a screw rod assembly 2, a lifter 3, an adjusting assembly 4, a level meter 5, a guide rod assembly 6, an upper lifting table 7 and the like. In addition, the laser measuring device also comprises a remote controller and a suitcase type control box. The control box is respectively electrically connected with the lower lifting platform 1, the lifter 3, the level 5 and the upper lifting platform 7 through pluggable cables so as to provide power supply and bidirectional data transmission, and the remote controller is wirelessly connected with the control box so as to realize remote control. The control box is further provided with a storage cavity, and the lower lifting platform 1, the screw rod assembly 2, the lifter 3, the adjusting assembly 4, the level gauge 5, the guide rod assembly 6 and the upper lifting platform 7 can be arranged in the control box after the use is completed, so that the control box is convenient to carry and can be freely transported.

As shown in fig. 1, the upper lifting table 7 and the lower lifting table 1 are arranged opposite to each other in the vertical direction and have the same structure, and in order to ensure the stability of the center of gravity of the entire laser surveying device and to provide a strong support, the dimension of the lower lifting table 1 is preferably twice as large as that of the upper lifting table 7. Since the upper lifting table 7 and the lower lifting table 1 have the same structure, the lower lifting table 1 is exemplified here. As shown in fig. 2, the lower lifting platform 1 comprises an upper mounting plate 8 and a lower mounting plate 9 which are oppositely arranged, and the lower mounting plate 9 is movably connected with the upper mounting plate 8 through a scissor-fork type lifting frame 11. The upper end surface of the lower mounting plate 9 is provided with a first screw rod 14 movably mounted through a bearing seat 15, one end of the first screw rod 14 is connected with a first servo motor 17 through a coupler, the first servo motor 17 is arranged on the lower mounting plate 9 through a support, and the first servo motor 17 is connected with and driven by a lifting frame 11 through the first screw rod 14. The first servo motor 17 drives the first screw rod 14 to lift or descend the lifting frame 11, and then the relative distance between the upper mounting plate 8 and the lower mounting plate 9 is changed.

As shown in fig. 2, four corners of the crane 11 are provided with movable rods 12. The crane 11 is articulated with the upper mounting panel 8 through the movable rod 12 of upper left end, and the crane 11 is through movable rod 12 and the 8 sliding connection of upper mounting panel of upper right end. Similarly, the lifting frame 11 is hinged with the lower mounting plate 9 through the movable rod 12 at the left lower end, and the lifting frame 11 is connected with the lower mounting plate 9 in a sliding manner through the movable rod 12 at the right lower end. The front and back side walls of the upper mounting plate 8 and the lower mounting plate 9 are provided with waist-shaped holes 10 for sliding of the movable rods 12, the waist-shaped holes 10 play a role in guiding the sliding of the movable rods 12, and meanwhile, the sliding distance of the movable rods 12 is limited, so that the overrun is avoided. The first screw rod 14 penetrates through the movable rod 12 at the left lower end and the movable rod 12 at the right lower end, the movable rod 12 at the left lower end is provided with a through hole, and the movable rod 12 at the right lower end is provided with a screw hole 13 meshed with the first screw rod 14. The first servo motor 17 drives the first screw rod 14 to rotate, and two ends of the movable rod 12 with the screw hole 13 are relatively fixed, so that the rotary motion of the first screw rod 14 is converted into the linear motion of the movable rod 12 sliding along the waist-shaped hole 10, the lifting of the lifting frame 11 is realized, and the integral lifting of the lower lifting platform 1 is further realized.

As shown in fig. 1 and 4, a plurality of sets of equally distributed support seats 16 are provided on both the lower end surface of the lower lifting table 1 and the upper end surface of the upper lifting table 7. The support base 16 includes an upper support column 35, a spring 36 and a lower support column 37, and the upper support column 35 is disposed on the lower end surface of the lower mounting plate 9 in the lower lifting platform 1 or the upper end surface of the lower mounting plate 9 in the upper lifting platform 7 by bolts. The upper end of the lower supporting column 37 is provided with a groove for nesting the upper supporting column 35, and the inner diameter of the groove is consistent with the outer diameter of the upper supporting column 35. The side wall of the lower supporting column 37 is provided with an oblong hole 39 which penetrates through the column body and is communicated with the groove, the side wall of the lower end of the upper supporting column 35 is provided with a shaft hole 38 corresponding to the oblong hole 39, the upper supporting column 35 is embedded in the groove to be connected with the lower supporting column 37 through a pin penetrating through the oblong hole 39 and the shaft hole 38, and the spring 36 is sleeved outside the upper supporting column 35 and abuts against the lower supporting column 37. The supporting seat 16 that the inferior elevating platform 1 and the upper elevating platform 7 set up can play buffering absorbing function, in addition when the ground unevenness, through the elastic expansion of supporting seat 16, can compensate the place of unevenness voluntarily, guarantees the holistic stability of measuring device.

As shown in fig. 1, 3 and 4, the lower lifting platform 1 is connected with the lower lifting platform 1 through a height-adjustable screw assembly 2 as a reinforced connection, guide rod assemblies 6 which are symmetrically distributed and used for connecting the lower lifting platform 1 with the upper lifting platform 7 and are adjustable in height are arranged on two sides behind the screw assembly 2, and the screw assembly 2 is in meshing transmission with the lifter 3 so that the lifter 3 can lift along the guide rod assemblies 6. The screw assembly 2 includes an upper screw 31 and a lower screw 32, and the guide bar assembly 6 includes an upper guide bar 33 and a lower guide bar 34. The upper screw rods 31 and the two sets of upper guide rods 33 are distributed in a triangular shape and fixed to the top plate 29 together by bolts, and the top plate 29 is mounted on the upper lifting table 7. The lower screw rods 32 and the two sets of lower guide rods 34 are similarly distributed in a triangular shape and are fixed together by bolts to the base plate 30, and the base plate 30 is mounted on the lower lifting table 1. The upper screw rod 31 is connected with the lower screw rod 32 through a plurality of groups of middle screw rods 19 which are same in specification and are sequentially connected end to end, the upper guide rod 33 is connected with the lower guide rod 34 through a plurality of groups of middle guide rods 18 which are same in specification and are sequentially connected end to end, slots 20 are formed in the upper ends of the middle guide rods 18, the middle screw rods 19, the lower screw rods 32 and the lower guide rod 34, and connecting shafts 21 corresponding to the slots 20 are formed in the lower ends of the middle guide rods 18, the middle screw rods 19, the upper screw rods 31 and the upper guide rods 33. In order to ensure that all parts in the screw rod assembly 2 can still play a role after being butted, the slots 20 of the middle screw rod 19 and the lower screw rod 32 are threaded holes, and the connecting shafts 21 of the middle screw rod 19 and the upper screw rod 31 are of corresponding stud structures, so that the threaded structures of the middle screw rods 19 can be accurately butted, and the normal work of the elevator 3 is further ensured. The total length of the middle guide rod 18 and the middle screw rod 19 is 600mm, and in order to ensure the connection strength, the length of the connecting shaft 21 accounts for one third of the total length of the middle guide rod 18 or the middle screw rod 19.

As shown in fig. 3, the elevator 3 includes a turbine reducer 24 that is fitted over the screw assembly 2 to perform meshing transmission. The bottom of the turbine speed reducer 24 is provided with an installation plate 23, and the upper end face of the installation plate 23 is provided with a shaft sleeve 25 for the guide rod assembly 6 to pass through. A second servo motor 22 is arranged on one side of the mounting plate 23, the second servo motor 22 is connected with an input shaft of a turbine speed reducer 24 through a coupler, and the adjusting assembly 4 is arranged on the other side of the mounting plate 23. The adjusting component 4 comprises a connecting frame 26 which is arranged on the side wall of the mounting plate 23 and is detachably mounted, an adjusting cavity is formed in the connecting frame 26, the level gauge 5 is slidably mounted in the adjusting cavity, a second lead screw 27 which penetrates through the level gauge 5 is arranged in the adjusting cavity, one end of the second lead screw 27 is rotatably connected with the inner wall of the adjusting cavity, and the other end of the second lead screw 27 extends to the outer side of the adjusting cavity and is provided with an adjusting knob 28.

Cables from the control box are respectively connected with the lower lifting platform 1, the lifting machine 3, the level 5 and the upper lifting platform so as to provide power supply and bidirectional data transmission. The lower screw bar 32 and the two sets of lower guide bars 34 are fixed together to the base plate 30 by bolts, and the base plate 30 is mounted on the lower elevating platform 1. The lifter 3 is fitted over the lower lead screw 32, and the lower guide bar 34 is passed out of the bushing 25. According to the vertical height of the house, a plurality of groups of middle screw rods 19 are sequentially connected in a threaded manner to form a long rod, one end of the long rod is connected with a lower screw rod 32 in a threaded manner, an upper screw rod 31 is in threaded connection with the other end of the long rod, a plurality of groups of middle guide rods 18 are sequentially spliced to form a long connecting rod, one end of the long connecting rod is spliced with a lower guide rod 34, and an upper guide rod 33 is spliced at the other end of the long connecting rod. The upper screw rod 31 and the two sets of upper guide rods 33 are fixed together to the top plate 29 by bolts, and the top plate 29 is mounted on the upper lifting table 7. Because the whole screw thread connection that adopts of lead screw subassembly 2, consequently the installation is accomplished the back, and lower elevating platform 1, lead screw subassembly 2, guide bar subassembly 6 and upper elevating platform 7 think into a comparatively stable frame body structure, and the frame body structure is right to stand. The lower lifting platform 1 and the upper lifting platform 7 are started through a remote controller or a control box, the lower lifting platform 1 and the upper lifting platform 7 can make up for a part of the missing distance through lifting, the upper lifting platform 7 abuts against a ceiling at the moment, and the middle screw rod assembly 2 and the middle guide rod assembly 6 are firmly clamped under the action of the lower lifting platform 1 and the upper lifting platform 7. The level 5 is removed, mounted on the lift 3 by the adjustment assembly 4, and the adjustment knob 28 is rotated so that the level 5 is in the target position. The lifter 3 is started through a remote controller or a control box, and the lifter 3 drives the level gauge 5 to lift along the guide rod assembly 6.

In accordance with the above embodiments of the present invention, these embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an adjustable laser surveying device for building engineering which characterized in that: including lower elevating platform (1), lift (3) and upper elevating platform (7), lower elevating platform (1) is connected with lower elevating platform (1) through height-adjustable's lead screw subassembly (2), lead screw subassembly (2) rear both sides are equipped with symmetric distribution's guide bar subassembly (6) that are used for connecting lower elevating platform (1) and upper elevating platform (7) and height-adjustable, lead screw subassembly (2) and lift (3) meshing transmission are so that lift (3) follow guide bar subassembly (6) lift operation, lift (3) one side is equipped with adjusting part (4), adjusting part (4) sliding connection has spirit level (5).

2. The adjustable laser measuring device for construction engineering according to claim 1, characterized in that: the upper lifting platform (7) and the lower lifting platform (1) are arranged in an up-down opposite direction and have the same structure, and the size specification of the lower lifting platform (1) is larger than that of the upper lifting platform (7).

3. The adjustable laser measuring device for construction engineering according to claim 2, characterized in that: lower elevating platform (1) is including last mounting panel (8), lower mounting panel (9) and first lead screw (14), lower mounting panel (9) up end is located through bearing frame (15) in first lead screw (14), there is first servo motor (17) first lead screw (14) one end through the coupling joint, lower mounting panel (9) are located through the support in first servo motor (17), lower mounting panel (9) are through crane (11) and the last mounting panel (8) swing joint of cutting the fork formula, first servo motor (17) are connected the drive through first lead screw (14) and crane (11).

4. The adjustable laser measuring device for construction engineering according to claim 3, characterized in that: crane (11) are equipped with multiunit movable rod (12), crane (11) are articulated through upper left end movable rod (12) and upper mounting panel (8), crane (11) are through upper right end movable rod (12) and upper mounting panel (8) sliding connection, crane (11) are articulated through lower left end movable rod (12) and lower mounting panel (9), crane (11) are through right lower extreme movable rod (12) and lower mounting panel (9) sliding connection, first lead screw (14) pass left lower extreme movable rod (12) and right lower extreme movable rod (12), and left lower extreme movable rod (12) are equipped with the through-hole, and right lower extreme movable rod (12) are equipped with screw (13) with first lead screw (14) interlock mutually.

5. The adjustable laser measuring device for construction engineering of claim 2, wherein: the lower end face of the lower lifting platform (1) and the upper end face of the upper lifting platform (7) are respectively provided with a plurality of groups of equally distributed supporting seats (16).

6. The adjustable laser measuring device for construction engineering of claim 5, wherein: support seat (16) are including upper support column (35), spring (36) and lower support column (37), upper support column (35) pass through the bolt setting at the lower terminal surface of lower elevating platform (1) or the up end of upper elevating platform (7), lower support column (37) upper end is equipped with the recess that is used for nested upper support column (35), lower support column (37) lateral wall is equipped with slotted hole (39) that run through the shaft and communicate the recess, upper support column (35) lower extreme lateral wall is equipped with shaft hole (38) corresponding with slotted hole (39), upper support column (35) inlay in the recess and are connected with pin current lower support column (37) that pass slotted hole (39) and shaft hole (38), spring (36) cover offsets in upper support column (35) the outside and with lower support column (37).

7. The adjustable laser measuring device for construction engineering of claim 1, wherein: lift (3) are including overlapping in lead screw subassembly (2) in order to mesh driven turbine speed reducer (24), turbine speed reducer (24) bottom is equipped with mounting panel (23), mounting panel (23) up end is equipped with axle sleeve (25) that supply guide bar subassembly (6) to walk, mounting panel (23) one side is equipped with second servo motor (22), second servo motor (22) are connected through the input shaft of shaft coupling with turbine speed reducer (24), adjusting part (4) set up the opposite side at mounting panel (23).

8. The adjustable laser measuring device for construction engineering according to claim 7, wherein: adjusting part (4) is including locating mounting panel (23) lateral wall and doing demountable installation's link (26), link (26) are equipped with the regulation cavity, spirit level (5) slidable mounting in the regulation cavity, be equipped with second lead screw (27) that pass spirit level (5) in the regulation cavity, swivelling joint is done with the regulation cavity inner wall to second lead screw (27) one end, second lead screw (27) other end extends to the regulation cavity outside and is equipped with adjust knob (28).

9. The adjustable laser measuring device for construction engineering of claim 1, wherein: lead screw subassembly (2) are including last lead screw (31) and lower lead screw (32), last lead screw (31) set up the lower terminal surface at last elevating platform (7) through the bolt, lead screw (32) are down the up end of elevating platform (1) through the bolt setting down, last lead screw (31) are connected with lower lead screw (32) through middle part lead screw (19) that the same and end to end of several groups specification meets in proper order, guide bar subassembly (6) are including last guide bar (33) and lower guide bar (34), last guide bar (33) are through the lower terminal surface of bolt setting up at last elevating platform (7), the up end of elevating platform (1) is down set up through the bolt to lower guide bar (34), last guide bar (33) are connected with lower guide bar (34) through middle part guide bar (18) that the same and end to end of several groups specification meet in proper order, the upper ends of the middle guide rod (18), the middle screw rod (19), the lower screw rod (32) and the lower guide rod (34) are respectively provided with a slot (20), and the lower ends of the middle guide rod (18), the middle screw rod (19), the upper screw rod (31) and the upper guide rod (33) are respectively provided with a connecting shaft (21) corresponding to the slot (20).

10. The adjustable laser measuring device for construction engineering of claim 9, wherein: the total length of the middle guide rod (18) and the middle screw rod (19) is 600mm, and the length of the connecting shaft (21) accounts for one third of the total length of the middle guide rod (18) or the middle screw rod (19).