CN114543769A

CN114543769A - A auto leveling structure for real estate mapping device

Info

Publication number: CN114543769A
Application number: CN202210175787.XA
Authority: CN
Inventors: 凌明毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-05-27

Abstract

The invention discloses an automatic leveling structure for a real estate surveying and mapping device, and relates to the technical field of a supporting device of a land surveying and mapping instrument. The invention comprises a mounting table for mounting a surveying and mapping device, and also comprises three electric adjusting supports, a storage battery, a control power supply, a swinging electric connection assembly and an electric connection seat; the three electric adjusting supports are circumferentially arranged below the mounting table respectively and are connected with the lower surface of the mounting table through universal connectors; the center of the lower surface of the mounting table is provided with a threaded hole matched with the swinging electric connection component; an external thread cylinder matched with the electric connection seat is fixed on the lower surface of the mounting table and is coaxially arranged with the threaded hole. According to the invention, the three electric adjusting supports are arranged below the mounting table, and the swinging electric connection assembly and the electric connection seat which are manufactured by applying the pendulum bob principle are arranged, so that the mechanical switch circuit correspondingly matched with the three electric adjusting supports is provided, and the level of the mounting table can be adjusted in time.

Description

A auto leveling structure for real estate mapping device

Technical Field

The invention belongs to the technical field of supporting devices of land surveying and mapping instruments, and particularly relates to an automatic leveling structure for a real estate surveying and mapping device.

Background

The land surveying work in real estate is most commonly carried out by various surveying instruments, the working principle and the using method of different surveying instruments are different, but one work of all the instruments is needed before the instruments are used, namely, the instruments are leveled, and the measured data of the instruments without leveling are inaccurate.

The utility model discloses a be CN211401228U through the current patent of patent retrieval utility model, the lower extreme fixed surface of fixing base installs the connecting piece, the lower extreme swing joint of connecting piece has the bracing piece, the connecting piece comprises adapter sleeve and installation sleeve, the adapter sleeve cover is established at installation sleeve's lower extreme, adapter sleeve's inner wall lower extreme fixed mounting has the rubber pad, fixedly connected with damping spring between adapter sleeve and the installation sleeve, adapter sleeve's lower extreme fixedly connected with connecting plate, the shaft hole has been seted up to the surface of connecting plate, fixed mounting has the position sleeve in the middle of the inside of fixing base, the inside movable mounting of position sleeve has the spin, the lower extreme fixedly connected with jib of spin, the lower extreme fixedly connected with counterweight ball of jib.

According to the scheme, a heavy hammer leveling mode is utilized, the whole structure is heavy, the measurement site needs to be moved for many times, and the movement and carrying are inconvenient. The support legs have a greater risk of overturning when used too short on the ground with a greater inclination. Under the condition of the weather with large wind power, the heavy hammer can swing, the position of the surveying and mapping instrument changes, and surveying and mapping cannot be carried out.

Based on the above problems, the present document provides an automatic leveling structure for a real estate mapping device for overcoming the above problems and enabling timely leveling.

Disclosure of Invention

The invention aims to provide an automatic leveling structure for a real estate mapping device.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to an automatic leveling structure for a real estate surveying and mapping device, which comprises a mounting table for mounting the surveying and mapping device, three electric adjusting supports, a storage battery, a control power supply, a swinging electric connection assembly and an electric connection seat, wherein the three electric adjusting supports are connected with the storage battery; the three electric adjusting supports are circumferentially arranged below the mounting table respectively and are connected with the lower surface of the mounting table through universal connectors; the center of the lower surface of the mounting table is provided with a threaded hole matched with the swinging electric connection component; an external thread cylinder matched with the electric connecting seat is fixed on the lower surface of the mounting table and is coaxially arranged with the threaded hole; and three connecting circuits are arranged between the swinging electric connecting assembly and the electric connecting seat and are used for respectively controlling the three electric adjusting supports to lift the height. The control power supply is also provided with three independent adjusting control circuits which respectively control the three electric adjusting supports to descend in height, and a switch for control is arranged on the electric adjusting supports and is in a manual control mode.

Furthermore, the electric adjusting support comprises a large arm, a small arm, a positioning bottom plate, a first connecting plate, a second connecting plate and an electric telescopic rod; the large arm and the small arm are connected through the first connecting plate and are arranged in parallel; the upper end of the large arm is connected with the mounting table through a universal connector; a rectangular through hole is formed in the middle of the first connecting plate; the second connecting plate penetrates through the rectangular through hole, and the middle part of the second connecting plate is rotatably connected with the middle part of the first connecting plate through a rotating shaft pin; two sliding rods are fixed at two ends of the second connecting plate; the large arm and the small arm are respectively provided with a slide way matched with the slide rod; the large arm is provided with an installation groove for installing the electric telescopic rod, and the installation groove is communicated with a slide way arranged on the large arm; the telescopic end of the electric telescopic rod is rotatably connected with the adjacent sliding rod through a hinged support. The lower end of the large arm is located on the lower side of the upper end of the small arm, the large arm and the slide way on the small arm, when the second connecting plate is perpendicular to the large arm and the small arm, the slide rod slides to the top end of the slide way, namely the electric telescopic rod is in an extending state, and at the moment, the supporting height of the electric adjusting support is the highest. The control circuit is adjusted back to retract the electric telescopic rod before use, so that the supporting height of the electric adjusting support is reduced to the minimum. Swing electric connection subassembly with electric connection seat intercommunication state time electric telescopic handle stretches out, drives the motion of second connecting plate, and electric regulation supports whole support height and promotes, to the lower one side lifting of mount table.

Further, the swinging electric connection assembly comprises a cone, an external thread connection cap, a bearing, a round ball and a non-conductive self-lubricating annular ball support; the external thread connecting cap is connected with the threaded hole, and a round through hole is formed in the end part of the external thread connecting cap; the bearing is arranged inside the external thread connecting cap; the annular ball support is clamped on the inner ring of the bearing; the round ball can be rotatably placed in the annular ball support; the ball is connected with the cone through a conductive connecting rod.

Further, the electrical connector includes an outer housing; the outer shell is in threaded connection with the external thread cylinder; the storage battery and the control power supply are both arranged inside the outer shell; a limiting cylinder is arranged at the bottom in the outer shell; three first threading holes are formed in the outer wall of the limiting cylinder; a charging connector and a power switch which are connected with the control power supply are arranged on the outer wall of the outer shell; a multi-position electric connecting seat matched with the swinging electric connecting assembly is arranged in the limiting cylinder in a sliding manner; and the shell is provided with a fine adjustment device for adjusting the multi-position electric connection seat.

Further, the multi-position electric connection seat comprises a separation bracket and sector electrodes with three inner conical surfaces; the separation bracket comprises a circular plate; a non-conductive barrel is fixed on the upper surface of the circular plate; three rectangular trapezoid partition plates which are uniformly distributed are fixed on the inner wall of the barrel, and one sector electrode is arranged between every two adjacent rectangular trapezoid partition plates; a second threading hole is formed in the wall of the barrel between every two adjacent right-angled trapezoid partition plates; and the circular plate is provided with four guide holes matched with the fine adjustment device. The conductive connecting rod of the swinging electric connection component and the fan-shaped electrode of the electric connection seat are used as a switch. Three fan electrodes correspond to three of the electrically adjustable supports. After the circuit of the corresponding side is switched on, the electric telescopic rod in the corresponding electric adjusting support extends out to drive the second connecting plate to move, the whole supporting height of the electric adjusting support is lifted, the lower side of the corresponding mounting table is lifted, the cone is gradually separated from the fan-shaped electrode in the lifting process, the cone is completely separated from the fan-shaped electrode after the mounting table is leveled, the whole circuit is disconnected, and automatic leveling operation is realized.

Further, the fine adjustment device comprises four groups of internal thread columns, springs, cap bolts and fine-tooth bolts for adjustment; a fine thread sleeve matched with the fine thread bolt penetrates through and is fixed at the center of the bottom of the outer shell; the internal thread column is fixedly arranged on the inner bottom surface of the outer shell; the cap bolt is arranged at the upper end of the internal thread column; the spring is disposed between the cap bolt and the upper surface of the circular plate.

Furthermore, one end of the end cap of the fine thread bolt is provided with a rotating handle, and an arrow is arranged on the rotating handle; and the bottom surface of the outer shell is carved with circle arc-shaped scale marks.

Further, the positioning bottom plate comprises a waist-round long plate; two first pointed cones are fixed on the lower surface of the waist-round long plate close to one end of the small arm; and a second pointed cone is fixed on the lower surface of the other end of the waist-round long plate.

The invention has the following beneficial effects:

1. according to the invention, the three electric adjusting supports are arranged below the mounting table, and the swinging electric connection assembly and the electric connection seat which are manufactured by applying the pendulum bob principle are arranged, so that the mechanical switch circuit correspondingly matched with the three electric adjusting supports is provided, and the level of the mounting table can be adjusted in time.

2. According to the invention, the sector electrode and the cone are connected with the circuit, after the circuit is connected, the electric telescopic rod in the corresponding electric adjusting support extends out to drive the second connecting plate to move, the whole supporting height of the electric adjusting support is lifted, the lower side of the corresponding mounting table is lifted, the cone is gradually separated from the sector electrode in the lifting process, the cone is completely separated from the sector electrode after the mounting table is leveled, the whole circuit is broken, and the automatic leveling operation of the surveying instrument is realized.

3. The invention adjusts the distance between the fan-shaped electrode and the cone through the fine adjustment device, thereby adjusting the precision of the integral automatic leveling.

4. The automatic leveling structure can be opened for a long time, and can be automatically adjusted after the level is broken, so that the time and the labor are saved, the precision of a surveying and mapping process is improved, and the surveying and mapping efficiency is improved.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

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

FIG. 1 is a front view of a self-leveling structure for a real estate mapping device of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a bottom view of the present invention.

Fig. 4 is a cross-sectional view taken at a-a in fig. 1.

Fig. 5 is a partial enlarged view of a portion a in fig. 4.

Fig. 6 is a schematic structural view of the mounting table.

FIG. 7 is a schematic structural diagram of a rocking electrical connection assembly.

Fig. 8 is a schematic structural diagram of the storage battery, the control power supply and the electrical connection socket.

Fig. 9 is a schematic view of the structure of the partition bracket.

Fig. 10 is a schematic structural view of a sector electrode.

Fig. 11 is a schematic structural view of a fine-pitch bolt.

Fig. 12 is a schematic structural view of the positioning base plate.

In the drawings, the components represented by the respective reference numerals are listed below:

1-mounting table, 2-electric adjusting support, 3-storage battery, 4-control power supply, 5-swinging electric connection component, 6-electric connection seat, 11-threaded hole, 12-external thread cylinder, 21-big arm, 22-small arm, 23-positioning bottom plate, 24-first connecting plate, 25-second connecting plate, 26-electric telescopic rod, 27-slideway, 211-mounting groove, 231-waist circular long plate, 232-first pointed cone, 233-second pointed cone, 241-rectangular through hole, 251-sliding rod, 51-cone, 52-external thread connecting cap, 53-bearing, 54-round ball, 55-annular ball support, 56-conductive connecting rod, 521-round through hole, 61-outer shell, 62-limiting cylinder, 63-a charging connector, 64-a power switch, 65-a multi-position electric connection seat, 66-a fine adjustment device, 611-a scale mark, 621-a first thread hole, 651-a separation bracket, 652-a fan-shaped electrode, 6511-a circular plate, 6512-a circular barrel, 6513-a right-angled trapezoid separation plate, 6514-a second thread hole, 6515-a guide hole, 661-an internal thread column, 662-a spring, 663-a capped bolt, 664-a fine-thread bolt, 665-a fine-thread sleeve, 6641-a rotating handle, 6642-an arrow.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-12, the present invention is an automatic leveling structure for real estate surveying and mapping device, comprising a mounting table 1 for mounting the surveying and mapping device, three electric adjusting supports 2, a storage battery 3, a control power source 4, a swinging electrical connection assembly 5 and an electrical connection seat 6; the three electric adjusting supports 2 are circumferentially arranged below the mounting table 1 respectively, and the electric adjusting supports 2 are connected with the lower surface of the mounting table 1 through universal connectors; a threaded hole 11 matched with the swinging electric connection component 5 is formed in the center of the lower surface of the mounting table 1; an external thread cylinder 12 matched with the electric connecting seat 6 is fixed on the lower surface of the mounting table 1, and the external thread cylinder 12 and the threaded hole 11 are coaxially arranged; three connecting circuits are arranged between the swinging electric connecting component 5 and the electric connecting seat 6 and are used for respectively controlling the three electric adjusting supports 2 to carry out height lifting. The control power supply 4 is also provided with three independent adjusting control circuits for respectively controlling the three electric adjusting supports 2 to descend in height, and a switch for control is arranged on the electric adjusting supports 2 and is in a manual control mode.

As shown in fig. 4, in the preferred embodiment of the present invention, the electric adjustable support 2 comprises a large arm 21, a small arm 22, a positioning bottom plate 23, a first connecting plate 24, a second connecting plate 25, and an electric telescopic rod 26; the large arm 21 and the small arm 22 are connected through a first connecting plate 24, and the large arm 21 and the small arm 22 are arranged in parallel; the upper end of the large arm 21 is connected with the mounting table 1 through a universal connector; a rectangular through hole 241 is formed in the middle of the first connecting plate 24; the second connecting plate 25 penetrates through the rectangular through hole 241, and the middle part of the second connecting plate 25 is rotatably connected with the middle part of the first connecting plate 24 through a rotating shaft pin; a sliding rod 251 is fixed at both ends of the second connecting plate 25; the big arm 21 and the small arm 22 are both provided with a slide way 27 matched with the slide rod 251; the large arm 21 is provided with a mounting groove 211 for mounting the electric telescopic rod 26, and the mounting groove 211 is communicated with a slide 27 arranged on the large arm 21; the telescopic end of the electric telescopic rod 26 is rotatably connected with the adjacent sliding rod 251 through a hinged support. Wherein, the lower end of the large arm 21 is located at the lower side of the upper end of the small arm 22, the slide way 27 on the large arm 21 and the small arm 22, when the second connecting plate 25 is perpendicular to the large arm 21 and the small arm 22, the slide rod 251 slides to the top end of the slide way 27, that is, the electric telescopic rod 26 is in the extending state, and at this time, the supporting height of the whole electric adjusting support 2 is the highest. The control circuit is adjusted back to retract the electric telescopic rod 26 before use, so that the whole supporting height of the electric adjusting support 2 is reduced to the minimum. When swinging the electric connection assembly 5 and being connected the state with electric connection seat 6, electric telescopic handle 26 stretches out, drives the motion of second connecting plate 25, and electric regulation supports 2 whole supporting height and promotes, to the lower one side lifting of mount table 1.

As shown in fig. 5 and 7, in a preferred embodiment of the present invention, the rocking electrical connection assembly 5 includes a cone 51, an externally threaded connection cap 52, a bearing 53, a spherical ball 54, and an annular ball support 55 which is non-conductive and self-lubricating; the external thread connecting cap 52 is connected with the threaded hole 11, and a round through hole 521 is formed in the end part of the external thread connecting cap 52; the bearing 53 is disposed inside the external screw coupling cap 52; the annular ball support 55 is clamped on the inner ring of the bearing 53; the round ball 54 is rotatably arranged in the annular ball support 55; the sphere 54 is connected to the cone 51 by a conductive link 56.

As shown in fig. 8, it is preferable in the present invention that the electric connection socket 6 includes an outer case 61; the outer shell 61 is in threaded connection with the external thread cylinder 12; the storage battery 3 and the control power supply 4 are both arranged inside the outer shell 61; a limiting cylinder 62 is arranged at the bottom in the outer shell 61; the outer wall of the limiting cylinder 62 is provided with three first threading holes 621; a charging connector 63 and a power switch 64 which are connected with the control power supply 4 are arranged on the outer wall of the outer shell 61; a multi-position electric connecting seat 65 matched with the swinging electric connecting component 5 is arranged in the limiting cylinder 62 in a sliding way; a trimmer 66 for adjusting the multi-position electrical connector 65 is mounted on the outer housing 61.

As shown in FIGS. 5, 8 and 9, the multi-position electrical connector 65 of the present invention preferably comprises a partition bracket 651 and three inwardly tapered fan electrodes 652; the separator bracket 651 includes a circular plate 6511; a non-conductive barrel 6512 is fixed on the upper surface of the circular plate 6511; three rectangular trapezoid partition plates 6513 uniformly distributed are fixed on the inner wall of the barrel 6512, and a sector electrode 652 is arranged between every two adjacent rectangular trapezoid partition plates 6513; a second threading hole 6514 is formed in the wall of the barrel 6512 between two adjacent right-angled trapezoid partition plates 6513; the circular plate 6511 is provided with four guide holes 6515 for cooperation with the fine adjustment means 66. The conductive rod 56 of the rocking electrical connection assembly 5 and the sector electrode 652 of the electrical connection socket 6 function as a switch. Three sector electrodes 652 correspond to three electrokinetically tuned supports 2. After the circuit of the corresponding side is switched on, the electric telescopic rod 26 in the corresponding electric adjusting support 2 extends out to drive the second connecting plate 25 to move, the whole supporting height of the electric adjusting support 2 is lifted, the lower side of the corresponding mounting table 1 is lifted, the cone 51 is gradually separated from the fan-shaped electrode 652 in the lifting process, the cone 51 is completely separated from the fan-shaped electrode 652 after the mounting table 1 is leveled, the whole circuit is switched off, and the automatic leveling operation is realized.

As shown in fig. 5, the fine adjustment device 66 preferably includes four sets of internally threaded posts 661, springs 662 and cap bolts 663 and fine thread bolts 664 for adjustment; a fine thread sleeve 665 matched with the fine thread bolt 664 penetrates through and is fixed at the center of the bottom of the outer shell 61; the internal thread post 661 is fixedly installed on the inner bottom surface of the outer shell 61; the cap bolt 663 is arranged at the upper end of the internal thread column 661; the spring 662 is disposed between the cap bolt 663 and the upper surface of the circular plate 6511.

As shown in fig. 3 and 11, in the preferred embodiment of the present invention, a rotating handle 6641 is disposed at one end of the end cap of the fine threaded bolt 664, and an arrow 6642 is disposed on the rotating handle 6641; the bottom surface of the outer casing 61 is marked with circle-arc-shaped scale lines 611. The distance between the fan-shaped electrode 652 and the cone 51 is adjusted by the fine adjustment device 66, and the precision of the overall automatic leveling is adjusted.

As shown in fig. 12, it is preferable that the positioning bottom plate 23 includes a long waisted plate 231; two first pointed cones 232 are fixed on the lower surface of the waist circular long plate 231 close to one end of the small arm 22; a second pointed cone 233 is fixed to the lower surface of the other end of the long waisted plate 231. The positioning bottom plate 23 is provided with two first pointed cones 232 and one second pointed cone 233, so that three positioning points which are deep into the ground are formed on the ground, and the whole positioning bottom plate is stable and reliable.

One specific application of this embodiment is: callback control circuit withdraws electric telescopic handle 26 before using, makes the holistic support height of electric regulation support 2 fall to minimum, supports 2 expandes three electric regulation, will be used for the mapping device of real estate to install on mount table 1, and after mount table 1 placed in and is close the horizontality, step on location bottom plate 23 and carry out ground location. The power switch 64 is turned on to supply power. When one side is lower, the fan-shaped electrode 652 is communicated with the cone 51, the electric telescopic rod 26 corresponding to the electric adjusting support 2 extends out to drive the second connecting plate 25 to move, the whole supporting height of the electric adjusting support 2 is lifted, the lower side corresponding to the mounting table 1 is lifted, the cone 51 is gradually separated from the fan-shaped electrode 652 in the lifting process, the cone 51 is completely separated from the fan-shaped electrode 652 after the mounting table 1 is leveled, the whole circuit is broken, and the automatic leveling operation is realized.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to 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. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic leveling structure for real estate mapping devices, comprising a mounting table (1) for mounting mapping devices, characterized in that:

the electric rocking chair is characterized by further comprising three electric adjusting supports (2), a storage battery (3), a control power supply (4), a rocking electric connection assembly (5) and an electric connection seat (6);

the three electric adjusting supports (2) are circumferentially arranged below the mounting table (1) respectively, and the electric adjusting supports (2) are connected with the lower surface of the mounting table (1) through universal connectors;

the center of the lower surface of the mounting table (1) is provided with a threaded hole (11) matched with the swinging electric connection component (5); an external thread cylinder (12) matched with the electric connecting seat (6) is fixed on the lower surface of the mounting table (1), and the external thread cylinder (12) and the threaded hole (11) are coaxially arranged;

and three connecting circuits are arranged between the swinging electric connecting component (5) and the electric connecting seat (6) and are used for respectively controlling the three electric adjusting supports (2).

2. The automatic levelling structure for real estate mapping devices according to claim 1 wherein the electrically adjustable support (2) comprises a large arm (21), a small arm (22), a positioning base plate (23), a first connecting plate (24), a second connecting plate (25), an electrically telescopic rod (26); the large arm (21) and the small arm (22) are connected through the first connecting plate (24), and the large arm (21) and the small arm (22) are arranged in parallel; the upper end of the large arm (21) is connected with the mounting table (1) through a universal connector; a rectangular through hole (241) is formed in the middle of the first connecting plate (24); the second connecting plate (25) penetrates through the rectangular through hole (241), and the middle part of the second connecting plate (25) is rotatably connected with the middle part of the first connecting plate (24) through a rotating shaft pin; a sliding rod (251) is fixed at each of two ends of the second connecting plate (25); the big arm (21) and the small arm (22) are respectively provided with a slide way (27) matched with the slide rod (251); the large arm (21) is provided with a mounting groove (211) for mounting the electric telescopic rod (26), and the mounting groove (211) is communicated with a slide way (27) arranged on the large arm (21); the telescopic end of the electric telescopic rod (26) is rotatably connected with the adjacent sliding rod (251) through a hinged support.

3. The self-leveling structure for real estate mapping devices of claim 1 where the rocking electrical connection assembly (5) comprises a cone (51), an externally threaded connection cap (52), a bearing (53), a spherical ball (54) and an annular ball support (55) that is non-conductive and self-lubricating; the external thread connecting cap (52) is connected with the threaded hole (11), and a round through hole (521) is formed in the end part of the external thread connecting cap (52); the bearing (53) is arranged inside the external thread connecting cap (52); the annular ball support (55) is clamped on the inner ring of the bearing (53); the round ball (54) is rotatably placed in the annular ball support (55); the round ball (54) is connected with the cone (51) through a conductive connecting rod (56).

4. The automatic leveling structure for real estate mapping devices of claim 1 wherein the electrical connection socket (6) comprises an outer housing (61); the outer shell (61) is in threaded connection with the external thread cylinder (12); the storage battery (3) and the control power supply (4) are both arranged inside the outer shell (61); a limiting cylinder (62) is arranged at the bottom in the outer shell (61); three first threading holes (621) are formed in the outer wall of the limiting cylinder (62); a charging connector (63) and a power switch (64) which are connected with the control power supply (4) are mounted on the outer wall of the outer shell (61); a multi-position electric connection seat (65) matched with the swinging electric connection component (5) is arranged in the limiting cylinder (62) in a sliding manner; and a fine adjustment device (66) for adjusting the multi-position electric connection seat (65) is arranged on the outer shell (61).

5. The self-leveling structure for real estate mapping devices of claim 4 where the multi-site electrical connection sockets (65) comprise a separation bracket (651) and three inwardly tapered fan electrodes (652); the separator bracket (651) comprises a circular plate (6511); a non-conductive barrel (6512) is fixed on the upper surface of the circular plate (6511); three rectangular trapezoid partition plates (6513) which are uniformly distributed are fixed on the inner wall of the barrel (6512), and one sector electrode (652) is arranged between every two adjacent rectangular trapezoid partition plates (6513); a second threading hole (6514) is formed in the wall of the barrel (6512) between two adjacent right-angled trapezoid partition plates (6513); the circular plate (6511) is provided with four guide holes (6515) matched with the fine adjustment device (66).

6. The auto-leveling structure for real estate mapping device of claim 5 where the fine adjustment device (66) comprises four sets of internal threaded posts (661), springs (662) and cap bolts (663) and fine thread bolts (664) for adjustment; a fine thread sleeve (665) matched with the fine thread bolt (664) penetrates through and is fixed at the center of the bottom of the outer shell (61); the internal thread column (661) is fixedly arranged on the inner bottom surface of the outer shell (61); the cap-equipped bolt (663) is arranged at the upper end of the internal thread column (661); the spring (662) is disposed between the cap bolt (663) and the upper surface of the circular plate (6511).

7. The auto-leveling structure for real estate surveying devices of claim 6 wherein the fine thread bolt (664) has a rotating handle (6641) at one end of its end cap and an arrow (6642) is provided on the rotating handle (6641); the bottom surface of the outer shell (61) is carved with circle arc-shaped scale marks (611).

8. The self-leveling structure for real estate mapping devices of claim 2 wherein the positioning base plate (23) comprises a long waist-round plate (231); two first pointed cones (232) are fixed on the lower surface of the waist-round long plate (231) close to one end of the small arm (22); a second pointed cone (233) is fixed on the lower surface of the other end of the waist-round long plate (231).