A high-precision positioning surveying instrument for engineering surveying and mapping

Abstract

The present invention discloses a high-precision positioning surveying instrument for engineering surveying and mapping, and relates to the technical field of engineering surveying and mapping. The present invention comprises a horizontally arranged support plate and a high-precision surveying instrument arranged above the support plate; a plurality of accommodating grooves are provided on the upper surface of the support plate in an annular direction; a movable block is rotatably connected in the accommodating groove; a mounting tube is rotatably inserted into the movable block; a coaxially arranged bottom support rod is matched with the inner thread of the mounting tube; the lower end of the bottom support rod extends out of the mounting tube and is coaxially fixed with a pin; a plurality of movable blocks are connected by an adjustment assembly; a plurality of mounting tubes are connected by a driving assembly; a carrying plate for carrying the high-precision surveying instrument is horizontally arranged above the support plate; the carrying plate and the support plate are connected by a lifting assembly. The present invention not only has a reasonable structural design and is convenient to use, but also effectively improves the use effect of the high-precision surveying instrument, and has a high market application value.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering surveying and mapping, and in particular relates to a high-precision positioning surveying instrument for engineering surveying and mapping. Background Art

[0002] The Chinese patent with the authorization announcement number CN215981789U discloses an adjustable surveying instrument positioning device for surveying and mapping engineering. The device releases the telescopic rod from the support leg. At this time, one hand can hold the two limit sleeves and squeeze the pressing block on the limit sleeve, so that the pressing block drives the sliding rod to move and the reset spring to deform. When the sliding rod moves, the limit plate moves, and the limit plate drives the tooth to move, so that the tooth and the rack are separated. At this time, the limit sleeve can drive the telescopic rod to move through the limit cross bar and the threaded rod, so that the telescopic rod is unfolded until the height of the installation platform is convenient for the user to operate, and then the pins are aligned with the ground. The stability is improved, and then the limit sleeve is released. At this time, the reset spring deformation is restored to drive the slide rod, the pressing block and the limit plate to reset. The limit plate drives the tooth to reset, so that the tooth is engaged with the rack again, so that the telescopic rod is locked and fixed. At this time, it is also necessary to fine-tune the length of the three telescopic rods so that the top of the installation platform is close to the horizontal state, which is convenient for the later horizontal adjustment of the surveying instrument. At this time, the handwheel can be turned, and the handwheel drives the threaded rod to rotate. The threaded rod drives the telescopic rod to move through the threaded groove, thereby achieving the purpose of fine-tuning the telescopic rod until the top of the installation platform is close to the horizontal state, which is convenient for the surveying instrument to be adjusted horizontally on the installation platform. The above device has the following disadvantages: since the expansion of the three telescopic rods is adjusted separately, this not only has the problem of low adjustment efficiency, but also the expansion length of the three telescopic rods may be inconsistent, resulting in time-consuming and labor-intensive adjustment of the installation position of the surveying instrument to a horizontal state, affecting the surveying efficiency. Summary of the Invention

[0003] The present invention provides a high-precision positioning surveying instrument for engineering surveying and mapping, the purpose of which is to solve the technical problems raised in the above background technology.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention provides a high-precision positioning surveying instrument for engineering surveying and mapping, comprising a horizontally arranged support plate and a high-precision surveying instrument arranged above the support plate; the upper surface of the support plate is provided with a plurality of accommodating grooves in an annular direction; a movable block is rotatably connected in the accommodating groove; a mounting tube is rotatably inserted into the movable block; the inner thread of the mounting tube is engaged with a coaxially arranged bottom support rod; the lower end of the bottom support rod extends out of the mounting tube and is coaxially fixed with a pin; the plurality of movable blocks are connected by an adjusting assembly; the adjusting assembly is installed below the support plate; the adjusting assembly is used to adjust the inclination angle of the mounting tube by driving the movable block to rotate in the accommodating groove; the plurality of mounting tubes are connected by a driving assembly; the driving assembly is used to realize axial movement of the bottom support rod on the mounting tube by driving the mounting tube to rotate; the driving assembly is installed above the support plate; a carrying plate for carrying the high-precision surveying instrument is horizontally arranged above the support plate; the carrying plate and the support plate are connected by a lifting assembly.

[0006] As a preferred technical solution of the present invention, the adjustment assembly includes a first screw sleeve fixedly inserted into the support plate; the first screw sleeve is coaxially arranged with the support plate; the internal thread of the first screw sleeve is matched with a vertically arranged first screw rod; the lower end of the first screw rod is coaxially fixed with a connecting column; the upper outer periphery of the connecting column is fixedly sleeved with a first hand wheel; the lower outer periphery of the connecting column is rotatably sleeved with a coaxially arranged limiting ring; the circumferential side wall of the limiting ring is rotatably connected to a plurality of transmission rods corresponding to the movable block; the lower end of the transmission rod is rotatably connected to a mounting bar; one end of the mounting bar is fixed to a surface of the movable block; the length direction of the mounting bar is arranged parallel to the length direction of the mounting tube.

[0007] As a preferred technical solution of the present invention, a guide assembly is installed on the outer periphery of the mounting tube; the guide assembly includes a pair of guide bars symmetrically arranged on the outer periphery of the mounting tube; the two ends of the guide bars are connected by a pair of bearing rings coaxially arranged with the mounting tube; the two bearing rings are clearance-fitted on the outer periphery of the mounting tube; one bearing ring is fixed on the movable block; an arc-shaped slider is slidably connected between the two guide bars; a guide rod is fixed to one surface of the arc-shaped slider along the axial direction of the mounting tube; a follower block is fixed to one end of the guide rod; the follower block is fixed to the upper end of the pin.

[0008] As a preferred technical solution of the present invention, the driving assembly includes a support cylinder coaxially fixed to the upper surface of the support disk; an operating sleeve is provided on the outer periphery of the support cylinder; a first gear is fixedly provided on the outer periphery of the lower end of the operating sleeve; a plurality of movable slats corresponding to the mounting cylinder are evenly distributed on the circumference of the first gear; one end of the movable slat is rotatably mounted on the outer periphery of the upper end of the mounting cylinder; the other end of the movable slat is connected to a transmission shaft rotatably along the axial direction of the mounting cylinder; a second gear and a first pulley are fixedly mounted on the transmission shaft; the second gear can mesh with the first gear; the first pulley is connected to the second pulley through belt transmission; the second pulley is fixedly mounted on the outer periphery of the upper end of the mounting cylinder.

[0009] As a preferred technical solution of the present invention, the other end of the movable slat has a through hole; the axial direction of the through hole is arranged parallel to the axial direction of the transmission shaft; a positioning column corresponding to the through hole is vertically inserted on the support plate; the positioning column is threadedly engaged with the support plate; when the movable slat is in a horizontal state, the upper end of the positioning column can be inserted into the through hole.

[0010] As a preferred technical solution of the present invention, the lifting assembly includes a second screw sleeve rotatably inserted into the upper end of the support tube and a plurality of sliding rods vertically inserted into the support plate; the second screw sleeve is coaxially arranged with the support tube; the outer peripheral fixed sleeve of the second screw sleeve is provided with a second hand wheel; the inner thread of the second screw sleeve is matched with a second screw rod; the upper end of the second screw rod is fixed to the lower surface of the supporting plate; the sliding rod is slidably matched with the support plate; the upper end of the sliding rod is fixed to the lower surface of the supporting plate; the outer peripheral sleeve of the sliding rod is provided with a tensioning spring; the upper end of the tensioning spring is fixed to the lower surface of the support plate; the upper end of the tensioning spring is fixed to the lower end of the sliding rod.

[0011] The present invention has the following beneficial effects:

[0012] The present invention installs the high-precision surveying instrument on the upper surface of the carrying plate, first puts the mounting tube in a vertical state, then uses the driving assembly to drive the mounting tube to rotate so that the bottom support rod gradually extends from the mounting tube, then uses the pin to contact the ground, and then uses the adjusting assembly to drive the movable block to rotate in the accommodating groove to adjust the inclination angle of the mounting tube, thereby improving the support stability of the high-precision surveying instrument, and finally uses the lifting assembly to drive the carrying plate to move up and down to fine-tune the horizontal position of the high-precision surveying instrument, thereby meeting the use requirements of the high-precision surveying instrument and effectively ensuring the use effect and surveying efficiency of the high-precision surveying instrument.

[0013] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 The figure is a structural schematic diagram of a high-precision positioning surveying instrument for engineering surveying and mapping according to the present invention.

[0016] Figure 2 It is a schematic structural diagram of the connection between the support plate and the mounting cylinder of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the connection between the support tube and the bottom support rod of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the adjustment component of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the connection between the movable block and the driving assembly of the present invention.

[0020] Figure 6 Schematic diagram of the structure of the drive assembly of the present invention.

[0021] Figure 7 for Figure 6 The main view of the structure.

[0022] Figure 8 It is a structural schematic diagram of the movable slats of the present invention.

[0023] Figure 9 It is a structural schematic diagram of the lifting assembly of the present invention.

[0024] Figure 10 It is a structural schematic diagram of the guide assembly of the present invention.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 1-Support plate, 2-High-precision surveying instrument, 3-Active block, 4-Mounting cylinder, 5-Bottom support rod, 6-Adjustment assembly, 7-Drive assembly, 8-Carrying plate, 9-Lifting assembly, 10-Guide assembly, 101-Accommodating groove, 102-Arc groove, 501-Pin, 601-First screw sleeve, 602-First screw, 603-Connecting column, 604-First hand wheel, 605-Transmission rod, 605-Mounting bar, 701-Support cylinder, 702-Operating sleeve, 703-first gear, 704-movable slat, 705-transmission shaft, 706-second gear, 707-first pulley, 708-second pulley, 901-second screw sleeve, 902-sliding rod, 903-second handwheel, 904-second screw, 905-tensioning spring, 1001-guide bar, 1002-bearing ring, 1003-arc-shaped slider, 1004-guide rod, 1005-driven block, 11-positioning column, 7041-through hole. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention. Specific embodiment one:

[0029] See also Figure 1-2As shown, the present invention is a high-precision positioning surveying instrument for engineering surveying and mapping, comprising a horizontally arranged support plate 1 and a high-precision surveying instrument 2 arranged above the support plate 1; the high-precision surveying instrument 2 is a conventional instrument in this field, which is an instrument and device for data acquisition, processing, output, etc. designed and manufactured based on the GPS system for surveying and mapping operations; the high-precision surveying instrument 2 needs to utilize a positioning device to support and lift it when in use, so as to ensure its working efficiency; three rectangular accommodating grooves 101 are provided on the upper surface of the support plate 1 along a circular direction; three arc-shaped grooves 102 are evenly distributed on the upper surface of the support plate 1 along a circular direction; the arc-shaped grooves 102 are provided at the edge of the support plate 1; the arc-shaped grooves 102 are used to accommodate the operator's fingers to facilitate the operator to hold the support plate 1; a movable block 3 is rotatably connected in the accommodating groove 101; a mounting cylinder 4 is rotatably inserted on the movable block 3, and the mounting cylinder 4 is inserted in the accommodating groove 101; when the mounting cylinder 4 is tilted, its upper end can point to the support plate 1; the upper end of the mounting cylinder 4 is a closed structure; the internal thread of the mounting cylinder 4 is equipped with a coaxially arranged bottom support rod 5; the lower end of the bottom support rod 5 extends out of the mounting cylinder 4 and is coaxially fixed with a pin 501; the upper part of the pin 501 is a cylindrical structure, and its lower part is a conical structure; the three movable blocks 3 are connected by an adjusting assembly 6; the adjusting assembly 6 is installed below the support plate 1; the adjusting assembly 6 is used to adjust the inclination angle of the mounting cylinder 4 by driving the movable block 3 to rotate in the accommodating groove 101; the three mounting cylinders 4 are connected by a driving assembly 7; the driving assembly 7 is used to realize axial movement of the bottom support rod 5 in the mounting cylinder 4 by driving the mounting cylinder 4 to rotate; the driving assembly 7 is installed above the support plate 1; a carrying plate 8 for carrying the high-precision surveying instrument 2 is horizontally arranged above the support plate 1; the high-precision surveying instrument 2 is installed on the upper surface of the carrying plate 8; the carrying plate 8 and the support plate 1 are connected by a lifting assembly 9; the lifting assembly 9 is used to drive the carrying plate 8 to move up and down.

[0030] During use, the high-precision surveying instrument 2 is installed on the upper surface of the carrying plate 8, the mounting tube 4 is first placed in a vertical state, and then the driving assembly 7 is used to drive the mounting tube 4 to rotate so that the bottom support rod 5 gradually extends out of the mounting tube 4, and then the pin 501 is in contact with the ground, and then the adjustment assembly 6 is used to drive the movable block 3 to rotate in the receiving groove 101 to adjust the inclination angle of the mounting tube 4, thereby improving the support stability of the high-precision surveying instrument 2, and finally the lifting assembly 9 is used to drive the carrying plate 8 to move up and down to fine-tune the horizontal position of the high-precision surveying instrument 2, thereby meeting the use requirements of the high-precision surveying instrument 2 and effectively ensuring the use effect and surveying efficiency of the high-precision surveying instrument 2. Specific embodiment two:

[0032] Based on the specific embodiment 1, Figure 3-4 and Figure 6-7As shown, the adjustment component 6 includes a first screw sleeve 601 fixedly inserted into the support plate 1; the first screw sleeve 601 is coaxially arranged with the support plate 1; the internal thread of the first screw sleeve 601 is matched with a vertically arranged first screw rod 602; the lower end of the first screw rod 602 is coaxially fixed with a connecting column 603; the upper periphery of the connecting column 603 is fixedly sleeved with a conventional first hand wheel 604 in this field; the lower periphery of the connecting column 603 is rotatably sleeved with a coaxially arranged limiting ring; the circumferential side wall of the limiting ring is rotatably connected to a plurality of transmission rods 605 corresponding to the movable block 3; the lower end of the transmission rod 605 is rotatably connected to a mounting bar 605; one end of the mounting bar 605 is fixed to a surface of the movable block 3; the length direction of the mounting bar 605 is arranged parallel to the length direction of the mounting tube 4. When in use, the first hand wheel 604 is rotated to drive the connecting column 603 to rotate, causing the first screw 602 to move up and down in the first screw sleeve 601, thereby driving the installation bar 605 to move through the transmission rod 605, and then the movable block 3 rotates in the accommodating groove 101 to achieve adjustment of the inclination angle of the installation tube 4, which can achieve synchronous adjustment of the three installation tubes 4, effectively improving the adjustment efficiency. Specific embodiment three:

[0034] Based on the specific embodiment 2, Figure 3 and Figure 10 As shown, a guide assembly 10 is installed on the outer periphery of the mounting cylinder 4; the guide assembly 10 includes a pair of guide bars 1001 symmetrically arranged on the outer periphery of the mounting cylinder 4; the two ends of the two guide bars 1001 are fixedly connected by a pair of bearing rings 1002 coaxially arranged with the mounting cylinder 4; the two bearing rings 1002 are both clearance-fitted on the outer periphery of the mounting cylinder 4; one bearing ring 1002 is fixed on the movable block 3; the other bearing ring 1002 is arranged at the lower end of the mounting cylinder 4; an arc-shaped slider 1003 is slidably connected between the two guide bars 1001; the arc-shaped slider 1003 is coaxially arranged with the mounting cylinder 4, and the inner surface of the arc-shaped slider 1003 is in contact with the circumferential outer wall of the mounting cylinder 4; a guide rod 1004 is fixed to one surface of the arc-shaped slider 1003 along the axial direction of the mounting cylinder 4; a follower block 1005 is fixed to one end of the guide rod 1004; the follower block 1005 is fixed to the upper end of the pin 501. By arranging the guide assembly 10 on the installation tube 4 , it is possible to ensure that the bottom support rod 5 extends smoothly from the installation tube 4 . Specific embodiment four:

[0036] Based on the specific embodiment 3, Figure 3 and Figure 5-8As shown, the drive assembly 7 includes a support cylinder 701 coaxially fixed to the upper surface of the support plate 1; the upper end of the first screw 602 can be inserted into the support cylinder 701; the outer periphery of the support cylinder 701 is provided with an operating sleeve 702; the upper end of the operating sleeve 702 is provided with an anti-slip thread; the outer periphery of the lower end of the operating sleeve 702 is fixedly provided with a coaxial first gear 703; a plurality of movable slats 704 corresponding to the mounting cylinder 4 are evenly distributed on the circumference of the first gear 703; one end of the movable slat 704 is rotated It is sleeved on the outer circumference of the upper end of the mounting cylinder 4, and one end of the movable slat 704 is also rotatably connected to the movable block 3; the other end of the movable slat 704 is rotatably connected to the transmission shaft 705 along the axial direction of the mounting cylinder 4; the second gear 706 and the first pulley 707 are fixedly sleeved on the transmission shaft 705; the second gear 706 can be engaged with the first gear 703; the first pulley 707 is connected to the second pulley 708 through belt transmission; the second pulley 708 is fixedly sleeved on the outer circumference of the upper end of the mounting cylinder 4. When the mounting tube 4 is in a vertical state, the second gear 706 is meshed with the first gear 703 by shifting the movable strip 704, and then the first gear 703 is driven to rotate by driving the operating sleeve 702, and the mounting tube 4 is driven to rotate on the movable block 3 through the second gear 706, the transmission shaft 705, the first pulley 707 and the second pulley 708, thereby achieving the purpose of axial movement of the bottom support rod 5 in the mounting tube 4; when it is necessary to use the adjustment component 6 to adjust the inclination angle of the mounting tube 4, the second gear 706 is separated from the first gear 703 by shifting the movable strip 704, and the movable strip 704 is shifted to the position of "not affecting the inclination angle adjustment of the mounting tube 4", thereby ensuring the inclination angle adjustment effect of the mounting tube 4.

[0037] Among them Figure 5 and Figure 8 As shown, the other end of the movable slat 704 has a through-hole 7041; the axial direction of the through-hole 7041 is arranged parallel to the axial direction of the transmission shaft 705; a positioning post 11 corresponding to the through-hole 7041 is vertically inserted through the support plate 1; the positioning post 11 is threadedly engaged with the support plate 1; when the movable slat 704 is in a horizontal state, the upper end of the positioning post 11 can be inserted into the through-hole 7041; the positioning post 11 is threadedly engaged with the through-hole 7041. After the movable slat 704 is moved to engage the second gear 706 with the first gear 703, the positioning post 11 is rotated to insert the upper end of the positioning post 11 into the through-hole 7041, thereby achieving the positioning of the movable slat 704 and ensuring the driving effect of the drive assembly 7 on the mounting cylinder 4. Specific embodiment five:

[0039] Based on the specific embodiment 4, Figure 6-7 and Figure 9As shown, the lifting assembly 9 includes a second screw sleeve 901 that is rotatably inserted into the upper end of the support tube 701 and three slide rods 902 that are vertically inserted into the support plate 1; the second screw sleeve 901 is coaxially arranged with the support tube 701; the outer periphery of the second screw sleeve 901 is fixedly sleeved with a conventional second hand wheel 903 in this field; the inner thread of the second screw sleeve 901 is matched with a second screw rod 904; the upper end of the second screw rod 904 is fixed to the lower surface of the supporting plate 8; the second screw sleeve 904 is a pipe structure; the inner hole of the second screw rod 904 can be clearance-matched with the first screw rod 602; the slide rod 902 is slidably matched with the support plate 1; the upper end of the slide rod 902 is fixed to the lower surface of the supporting plate 8; the outer periphery of the slide rod 902 is sleeved with a tensioning spring 905; the upper end of the tensioning spring 905 is fixed to the lower surface of the support plate 1; the upper end of the tensioning spring 905 is fixed to the lower end of the slide rod 902. During use, the second hand wheel 903 is operated to drive the second screw sleeve 901 to rotate, causing the second screw rod 904 to move up and down in the second screw sleeve 901, thereby realizing the lifting and lowering of the carrier plate 8, and further realizing the fine adjustment of the horizontal position of the high-precision surveying instrument 2.

[0040] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-precision positioning surveying instrument for engineering surveying and mapping, comprising a horizontally arranged support plate (1) and a high-precision surveying instrument (2) arranged above the support plate (1); characterized in that: The upper surface of the support plate (1) is provided with a plurality of receiving grooves (101) along a circular direction; a movable block (3) is rotatably connected in the receiving groove (101); a mounting tube (4) is rotatably inserted into the movable block (3); the mounting tube (4) is internally threaded with a coaxially arranged bottom support rod (5); the lower end of the bottom support rod (5) extends out of the mounting tube (4) and is coaxially fixed with a pin (501); The plurality of movable blocks (3) are connected to each other via an adjusting assembly (6); the adjusting assembly (6) is installed below the support plate (1); the adjusting assembly (6) is used to adjust the inclination angle of the mounting cylinder (4) by driving the movable block (3) to rotate in the receiving groove (101); the plurality of mounting cylinders (4) are connected to each other via a driving assembly (7); the driving assembly (7) is used to drive the mounting cylinder (4) to rotate to achieve axial movement of the bottom support rod (5) in the mounting cylinder (4); the driving assembly (7) is installed above the support plate (1); a carrying plate (8) for carrying a high-precision surveying instrument (2) is horizontally arranged above the support plate (1); the carrying plate (8) and the support plate (1) are connected via a lifting assembly (9); The adjusting assembly (6) comprises a first screw sleeve (601) fixedly inserted on the supporting plate (1); the first screw sleeve (601) is coaxially arranged with the supporting plate (1); the internal thread of the first screw sleeve (601) is matched with a vertically arranged first screw rod (602); the lower end of the first screw rod (602) is coaxially fixed with a connecting column (603); the upper periphery of the connecting column (603) is fixedly sleeved with a first hand wheel (604); the lower periphery of the connecting column (603) is rotatably sleeved with a coaxially arranged limiting ring; the circumferential side wall of the limiting ring is rotatably connected to a plurality of transmission rods (605) corresponding to the movable block (3); the lower end of the transmission rod (605) is rotatably connected to a mounting bar (606); one end of the mounting bar (606) is fixed to a surface of the movable block (3); the length direction of the mounting bar (606) is arranged parallel to the length direction of the mounting cylinder (4); A guide assembly (10) is mounted on the outer periphery of the mounting tube (4); the guide assembly (10) comprises a pair of guide bars (1001) symmetrically arranged on the outer periphery of the mounting tube (4); the two ends of the guide bars (1001) are connected via a pair of bearing rings (1002) coaxially arranged with the mounting tube (4); the two bearing rings (1002) are both clearance-fitted on the outer periphery of the mounting tube (4); one bearing ring (1002) is fixed on the movable block (3); an arc-shaped slider (1003) is slidably connected between the two guide bars (1001); a guide rod (1004) is fixed to one surface of the arc-shaped slider (1003) along the axial direction of the mounting tube (4); a driven block (1005) is fixed to one end of the guide rod (1004); the driven block (1005) is fixed to the upper end of the pin (501); The driving assembly (7) comprises a supporting cylinder (701) coaxially fixed to the upper surface of the supporting disk (1); an operating sleeve (702) is rotatably sleeved on the outer periphery of the supporting cylinder (701); a first gear (703) is coaxially fixedly sleeved on the outer periphery of the lower end of the operating sleeve (702); a plurality of movable slats (704) corresponding to the mounting cylinder (4) are evenly distributed on the circumference of the first gear (703); one end of the movable slat (704) is rotatably sleeved on the mounting cylinder (4) The outer periphery of the upper end of the movable slat (704); the other end of the movable slat (704) has a through hole (7041); the axial direction of the through hole (7041) is arranged parallel to the axial direction of the transmission shaft (705); a positioning column (11) corresponding to the through hole (7041) is vertically inserted through the support plate (1); the positioning column (11) is threadedly engaged with the support plate (1); when the movable slat (704) is in a horizontal state, the upper end of the positioning column (11) can be inserted into the through hole (704 1); when the mounting tube (4) is in a vertical state, the second gear (706) is meshed with the first gear (703) by toggling the movable plate (704), and the upper end of the positioning column (11) can be inserted into the through hole (7041) by rotating the positioning column (11); when the inclination angle of the mounting tube (4) needs to be adjusted by using the adjustment component (6), the second gear (706) is meshed with the first gear (703) by toggling the movable plate (704). 3) separation; the other end of the movable slat (704) is connected to a transmission shaft (705) in an axially rotatable manner along the mounting cylinder (4); a second gear (706) and a first pulley (707) are fixedly sleeved on the transmission shaft (705); the second gear (706) can be engaged with the first gear (703); the first pulley (707) is connected to a second pulley (708) through a belt transmission; the second pulley (708) is fixedly sleeved on the outer periphery of the upper end of the mounting cylinder (4).

2. A high-precision positioning surveying instrument for engineering surveying and mapping according to claim 1, characterized in that: The lifting assembly (9) includes a second screw sleeve (901) that is rotatably inserted into the upper end of the support tube (701) and a plurality of slide rods (902) that are vertically inserted into the support plate (1); the second screw sleeve (901) is coaxially arranged with the support tube (701); the outer peripheral fixed sleeve of the second screw sleeve (901) is provided with a second hand wheel (903); the internal thread of the second screw sleeve (901) is matched with a second screw rod (904); the upper end of the second screw rod (904) is fixed to the lower surface of the supporting plate (8); the slide rod (902) is slidably matched with the supporting plate (1); the upper end of the slide rod (902) is fixed to the lower surface of the supporting plate (8).

3. A high-precision positioning surveying instrument for engineering surveying and mapping according to claim 2, characterized in that: The outer periphery of the slide bar (902) is provided with a tensioning spring (905); the upper end of the tensioning spring (905) is fixed on the lower surface of the support plate (1); and the upper end of the tensioning spring (905) is fixed on the lower end of the slide bar (902).

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