A surveying instrument positioning device for engineering surveying

Abstract

The present invention relates to the field of surveying and positioning technology, and specifically is a surveying instrument positioning device for engineering surveying and mapping, comprising a main support ring plate, wherein three connection grooves are provided at the bottom of the main support ring plate, a connection block is movably provided inside each of the connection grooves, a supporter is movably installed at the bottom of each of the connection blocks, an inner fixed fan plate is fixed to the inner peripheral wall of the main support ring plate by screws, an inner support ring is fixed to the top outer wall of the inner fixed fan plate, and the present invention performs initial positioning and calibration through a calibration spherical disk on the inner side of a bearing ring, and this method of most directly reflecting the horizontal plane can cope with various difficult-to-calibrate environments, so as to quickly and effectively find the exact horizontal reference, and adopts a variety of judgment methods to roughly calibrate the surveying instrument, which can ensure that when each surveying instrument needs to be horizontally calibrated, the foot screw carried by itself can further quickly find the surveying and mapping reference horizontal plane, and the requirements for the adjustable limit of the foot screw are reduced.

Description

Technical Field

[0001] The invention relates to the field of surveying and mapping positioning technology, in particular to a surveying and mapping instrument positioning device for engineering surveying and mapping. Background Art

[0002] During the placement and installation of a conventional surveying instrument positioning device, when adjusting the tripod for a large slope, the triangular support arms need to be adjusted repeatedly one by one to adapt to the uneven or steep ground. However, when leveling the surveying instrument under the condition that the flatness or steepness cannot be distinguished, the adjustment of the tripod directly affects the angle of the surveying instrument placed on the top, so that it takes a long time to adjust the foot screws to make the placement plate level. Moreover, when measuring an environment with a large terrain undulation, since the adjustment range of the foot screws is limited, it takes a lot of time to adjust repeatedly, and sometimes it still cannot meet the level requirement. Therefore, the present application proposes a surveying instrument positioning device for engineering surveying to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a surveying instrument positioning device for engineering surveying and mapping to solve the problems raised in the above background technology.

[0004] The technical solution of the present invention is: a surveying instrument positioning device for engineering surveying and mapping, comprising a main support ring plate, three connection grooves are provided at the bottom of the main support ring plate, a connection block is movably provided inside each of the connection grooves, a supporter is movably installed at the bottom of each of the connection blocks, an inner fixed fan plate is fixed to the inner peripheral wall of the main support ring plate by screws, an inner support ring is fixed to the top outer wall of the inner fixed fan plate, a passive gear ring is rotatably connected to the top of the inner support ring, a bearing ring is fixed to the inner peripheral wall of the passive gear ring, a rolling groove is provided on the inner wall of the bearing ring, a plurality of high-strength rolling balls are installed inside the rolling groove, an inner peripheral wall of the bearing ring is integrally formed with an inner ring clamp, a transmission ring is fixed to the inner peripheral wall of the inner fixed fan plate, The inner wall of the transmission ring is connected with a threaded top ring through a thread, and the outer peripheral wall of the threaded top ring is provided with a passive groove, and the inner ring card can be inserted into the passive groove. A calibration spherical disk is placed on the top of several of the high-strength rolling balls, and when the threaded top ring is raised, it can contact the bottom surface of the calibration spherical disk. The outer peripheral wall of the calibration spherical disk is also integrally formed with a disk extension. The calibration spherical disk is rotatably connected to a dual-purpose fixing rod, the top of the dual-purpose fixing rod is threaded, and the bottom of the dual-purpose fixing rod is welded with a hanging weight handle, and the bottom of the hanging weight handle is integrally formed with a hook, and the main support ring plate is also provided with a tooth groove, and a toggle tooth is rotatably connected in the tooth groove, and the toggle tooth is meshed with the passive gear ring.

[0005] Preferably, the outer wall of the bearing ring is connected with a lifting ring through a threaded sleeve, and the bottom of the bearing ring is integrally formed with three grooved extension plates, each of the grooved extension plates is slidably connected with a selective sliding card, and the selective sliding card can contact the outer wall of one side of the connecting block.

[0006] Preferably, a plurality of fixing nails are fixed to the top outer wall of the main support ring plate, and the same instrument support plate is sleeved on all the fixing nails. A plurality of springs are provided between the instrument support plate and the main support ring plate, and the springs are respectively sleeved on the periphery of the fixing nails. A calibration hole is opened in the center of the instrument support plate, and a dual-purpose fixing rod can pass through the calibration hole and extend to the top of the instrument support plate.

[0007] Preferably, the top of the dual-purpose fixing rod can be plugged into the instrument chassis through a thread, the instrument body is fixedly installed on the top of the dual-purpose fixing rod, a bubble indicator is provided on the top of the instrument body, and a foot screw is also provided between the instrument body and the instrument chassis for fine-tuning the levelness of the instrument body.

[0008] Preferably, connecting slide bars are integrally formed on both side outer walls of the connecting block, and slide bars are provided on both sides of the inner wall of each connecting groove, in which the connecting slide bar can slide, and a second spring is provided between the connecting slide bar and the inner wall of the slide bar, so that the second spring can be stretched when the connecting block is pushed.

[0009] Preferably, the support device includes a main leg and a foot, the connecting block is provided with a rotation groove, the main leg is rotatably connected to the corresponding rotation groove, the foot is inserted into the interior of the main leg, one side outer wall of the main leg is threadedly inserted with a positioning bolt, and the positioning bolt passes through one side wall of the main leg and can contact one side outer wall of the foot, the bottom of the foot is fixedly sleeved with a fixed bottom block, one side outer wall of the fixed bottom block is hinged with a pedal, and a positioning cone is fixed to the bottom of the fixed bottom block.

[0010] Preferably, a slide card toggle handle is integrally formed at the bottom of the selective slide card, and an outer side wall of the selective slide card is provided with an outward convex curved surface for contacting and pushing out the connection block toward the periphery.

[0011] The present invention provides a surveying instrument positioning device for engineering surveying and mapping through improvement, which has the following improvements and advantages compared with the prior art:

[0012] First, the present invention uses the calibration spherical disc on the inner side of the bearing ring to perform initial positioning calibration. This method of directly reflecting the horizontal plane can cope with various difficult-to-calibrate environments, so as to quickly and effectively find the exact horizontal reference, and adopts multiple determination methods to roughly calibrate the surveying instrument, which can ensure that when each surveying instrument needs to be horizontally calibrated, the foot screw carried by it can further quickly find the surveying reference horizontal plane, and reduce the requirements for the adjustable limit of the foot screw;

[0013] Secondly, when the present invention is adjusted to within the calibrable range of the foot screw, there is no need to repeatedly adjust the support device. This method can cope with harsh terrain or scenes with large undulations, and even the terrain where it is difficult to distinguish the horizontality can accurately determine the adjustable range of the foot screw for the horizontal position, and has a wide range of applications;

[0014] Thirdly, the present invention can provide an accurate judgment method based on the basis when adjusting the support, and can effectively reduce the degree of deviation of the instrument support plate from the horizontal plane in advance, which can promote the subsequent fine-tuning of the level of the instrument body to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 It is a partial structural schematic diagram of the instrument body and the bottom connecting piece in the present invention;

[0018] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the main support ring plate and its connecting parts in the present invention;

[0019] Figure 4 yes Figure 3 A partial enlarged view of part A;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the calibration spherical disk in the present invention;

[0021] Figure 6 It is a three-dimensional schematic diagram of the connection between the passive gear ring and the toggle gear in the present invention;

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the lifting ring and the connecting block in the present invention;

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the main support ring plate and the inner fixed fan plate in the present invention;

[0024] Fig. 9 It is a three-dimensional cross-sectional schematic diagram of the bearing ring and its connecting member in the present invention;

[0025] Fig.10 It is a three-dimensional disassembled schematic diagram of the main support ring plate and its connecting parts in the present invention;

[0026] Fig.11 It is a schematic plan cross-sectional view of the instrument support plate of the present invention when it deviates from the calibration spherical disk;

[0027] Fig.12 It is a schematic diagram of the three-dimensional structure of the selective sliding card in the present invention.

[0028] Description of reference numerals:

[0029] 1. Instrument body; 2. Main support ring plate; 3. Main support leg; 4. Support foot; 6. Positioning bolt; 7. Pedal; 8. Fixed bottom block; 9. Instrument support plate; 10. Toggle gear; 12. Connecting block; 13. Fixing nail; 14. Dual-purpose fixing rod; 15. Suspension handle; 16. Calibration spherical plate; 17. High-strength rolling ball; 18. Passive gear ring; 19. Inner support ring; 20. Selective sliding card; 21. Lifting ring; 22. Transmission ring; 23. Bearing ring; 24. Threaded top ring; 25. Inner Fixed fan plate; 26, spring one; 90, calibration hole; 111, bubble indicator; 112, instrument chassis; 113, foot screw; 120, rotation slot; 121, connecting slide; 122, spring two; 151, hook; 161, disk extension; 200, tooth groove; 201, connection slot; 211, slotted extension plate; 230, rolling groove; 231, inner circle card; 240, passive groove; 2001, slide card toggle handle; 2010, slide groove; 2002, convex surface. DETAILED DESCRIPTION

[0030] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a surveying instrument positioning device for engineering surveying and mapping. The technical solution of the present invention is:

[0032] Reference Figure 1-Figure 12As shown, a surveying instrument positioning device for engineering surveying and mapping comprises a main support ring plate 2, three connection grooves 201 are provided at the bottom of the main support ring plate 2, a connection block 12 is movably provided inside each connection groove 201, a supporter is movably installed at the bottom of each connection block 12, an inner fixed fan plate 25 is fixed to the inner peripheral wall of the main support ring plate 2 by screws, an inner support ring 19 is fixed to the top outer wall of the inner fixed fan plate 25, a passive gear ring 18 is rotatably connected to the top of the inner support ring 19, a bearing ring 23 is fixed to the inner peripheral wall of the passive gear ring 18, a rolling groove 230 is provided on the inner wall of the bearing ring 23, a plurality of high-strength rolling balls 17 are installed inside the rolling groove 230, an inner peripheral wall of the bearing ring 23 is integrally formed with an inner ring clamp 231, a transmission ring 22 is fixed to the inner peripheral wall of the inner fixed fan plate 25, a threaded top ring 24 is inserted into the inner wall of the transmission ring 22 by threads, and the thread A passive groove 240 is provided on the outer peripheral wall of the top ring 24, and the inner ring card 231 can be inserted into the passive groove 240. A calibration spherical disk 16 is placed on the top of several high-strength rolling balls 17. When the threaded top ring 24 is raised, it can contact the bottom surface of the calibration spherical disk 16. The outer peripheral wall of the calibration spherical disk 16 is also integrally formed with a disk extension 161. The calibration spherical disk 16 is rotatably connected to a dual-purpose fixing rod 14. The dual-purpose fixing rod 14 only rotates inside the calibration spherical disk 16 and no relative linear displacement occurs. The top of the dual-purpose fixing rod 14 is threaded, and a hanging weight handle 15 is welded to the bottom of the dual-purpose fixing rod 14. A hook 151 is integrally formed at the bottom of the hanging weight handle 15. A tooth groove 200 is also provided on the main support ring plate 2. A toggle tooth 10 is rotatably connected in the tooth groove 200, and the toggle tooth 10 is meshed with the passive gear ring 18.

[0033] Among them, when the disk extension 161 moves with the calibration spherical disk 16, when the instrument support plate 9 deviates from the horizontal position significantly, the disk extension 161 will contact the instrument support plate 9, which obviously determines that the horizontality of the instrument support plate 9 is low, and the length or position of the support needs to be readjusted; wherein, the high-strength rolling ball 17 in this embodiment only provides the function of rolling and simple support, and the wear of the high-strength rolling ball 17 in this embodiment is not considered. Its purpose is to make the calibration spherical disk 16 be in a horizontal state only when it is affected by its own gravity. Other methods that can provide the same effect or are alternative do not affect the implementation of this solution.

[0034] The principle of the implementation process of the above scheme is as follows: when the support is initially fixed at the position to be measured, the entire main support ring plate 2 is fixed. Due to the weight of the hanging weight handle 15 itself, the center of the entire calibration spherical disk 16 moves downward. Regardless of whether the main support ring plate 2 is in a horizontal position, when the high-strength rolling ball 17 in the bearing ring 23 supports the calibration spherical disk 16, the plane of the top of the entire calibration spherical disk 16 will move closer to the horizontal position, and will be in a horizontal position without obstruction. At this time, the support does not need to be adjusted anymore, and the rotating gear 10 is rotated to rotate the passive gear ring 18 and the inner shaft The bearing ring 23 rotates, and the clamp 231 inside the ring drives the threaded top ring 24 to rotate. Under the threaded connection between the inner wall of the fixed transmission ring 22 and the threaded top ring 24, the threaded top ring 24 will rise to lift the calibration spherical disk 16 until it contacts and fits completely with the instrument support plate 9. At this time, the calibration spherical disk 16 will deflect, but because the initial calibration method has determined that the instrument support plate 9 is within the adjustable range of the foot screw 113 at this time, the calibration spherical disk 16 does not need to provide calibration function, and the dual-purpose fixing rod 14 is used to provide the function of supporting the instrument chassis 112.

[0035] Specifically, a plurality of fixing nails 13 are fixed to the top outer wall of the main support ring plate 2, and the same instrument support plate 9 is sleeved on all the fixing nails 13. A plurality of springs 26 are provided between the instrument support plate 9 and the main support ring plate 2, and the springs 26 are respectively sleeved on the periphery of the fixing nails 13. A calibration hole 90 is opened in the center of the instrument support plate 9, and the dual-purpose fixing rod 14 can penetrate the calibration hole 90 and extend to the top of the instrument support plate 9.

[0036] The above-mentioned condition for being in a horizontal position without obstruction is: the disc extension 161 of the calibration spherical disc 16 does not contact the instrument support plate 9 at the beginning, and the dual-purpose fixing rod 14 does not contact the inner circumferential wall of the threaded top ring 24, and the dual-purpose fixing rod 14 does not contact the calibration hole 90; the above-mentioned conditions can be implemented as follows: increasing the inner diameter of the threaded top ring 24 which is not convenient for observation so that the dual-purpose fixing rod 14 will never contact the inner wall of the threaded top ring 24 during rough calibration; reducing the radius of the disc extension 161 so that when the calibration spherical disc 16 rotates relatively, it is ensured that the disc extension 161 does not contact the bottom surface of the instrument support plate 9; and only reducing the aperture of the calibration hole 90 to reduce the maximum limit of deviation so as to achieve a clearer observation and judgment method.

[0037] Furthermore, the horizontality of the instrument support plate 9 can be determined by whether the dual-purpose fixing rod 14 is in contact with the calibration hole 90. When the dual-purpose fixing rod 14 is in obvious contact with the calibration hole 90, the main support ring plate 2 deviates from the horizontal position to a large extent, and the support needs to be readjusted. When the dual-purpose fixing rod 14 is not in contact with the calibration hole 90, the main support ring plate 2 deviates from the horizontal position to a small extent and is within the calibrable range of the foot screw 113 on the instrument body 1.

[0038] Further references Fig.11 As shown, when the disc extension 161 is not in contact with the instrument support plate 9 or the dual-purpose fixing rod 14 is not in contact with the calibration hole 90, the instrument support plate 9 is not necessarily in a horizontal position at this time, but is within the calibrable range of the foot screw 113. In this way, there is no need to repeatedly adjust the support. This method can cope with harsh terrain or scenes with excessive undulations, and even in terrain where it is difficult to distinguish the horizontality, the adjustable range of the foot screw 113 for the horizontal position can be accurately determined.

[0039] Optionally, the outer wall of the bearing ring 23 is connected with a lifting ring 21 through a threaded sleeve, and the bottom of the bearing ring 23 is integrally formed with three slotted extension plates 211, each of which is located between two adjacent blades on the inner fixed fan plate 25, and each of the slotted extension plates 211 is slidably connected with a selective sliding card 20, which can contact the outer wall of one side of the connecting block 12; the outer walls of both sides of the connecting block 12 are integrally formed with connecting slides 121, each Slide grooves 2010 are provided on both sides of the inner wall of the connection groove 201, and the connecting slide bar 121 can slide in the slide groove 2010. A spring 2 122 is provided between the connecting slide bar 121 and the inner wall of the slide groove 2010, so that the spring 2 122 can be stretched when the connecting block 12 is pushed; a slide card toggle handle 2001 is integrally formed at the bottom of the selective slide card 20, and an outer side wall of the selective slide card 20 is provided with an outer convex surface 2002 for resisting and pushing the connecting block 12 toward the periphery.

[0040] Reference Figure 7 , Fig.11 and Fig.12 As shown, it should be noted that the function of the selective slide card 20 is that when it is clearly observed that the dual-purpose fixing rod 14 is not in contact with the inner peripheral wall of the calibration hole 90 and the dual-purpose fixing rod 14 is not in the exact center of the calibration hole 90, there is still a certain degree of deflection. At this time, the selective slide card 20 on the side of the deviation direction can be toggled, as shown in FIG. Fig.11Taking an example to illustrate, the selective slide card 20 is moved to fall between the connecting block 12 and the slotted extension plate 211. When the rotating toggle gear 10 drives the bearing ring 23 to rotate, the lifting ring 21 and the threaded action of the outer wall of the bearing ring 23 and the slotted extension plate 211 are limited by the blades of the internal fixed fan plate 25, so that the lifting ring 21 rises, driving the selective slide card 20 to move up, so that the convex surface 2002 gradually contacts the outer wall of one side of the connecting block 12 until the connecting block 12 is pushed to extend slightly outward, and the spring 2 122 starts to pull up until the calibration The spherical disk 16 is completely fitted with the instrument support plate 9. At this time, the outward movement of the connecting block 12 will slightly push the connected support to rotate around the ground contact point, so that the entire main support ring plate 2 will be closer to the horizontal position. The specific effect is: the rotating toggle tooth 10 will simultaneously drive the calibration spherical disk 16 which is in the horizontal plane to move up and the instrument support plate 9 to deflect in the form of a horizontal position, so that the instrument support plate 9 is more horizontal than the initial position when the selective slide card 20 is not used, further promoting the rough calibration of the initial fixation.

[0041] Specifically, the top of the dual-purpose fixing rod 14 can be threadedly plugged into the instrument chassis 112, and the instrument body 1 is fixedly installed on the top of the dual-purpose fixing rod 14. A bubble indicator 111 is provided on the top of the instrument body 1, and a foot screw 113 is also provided between the instrument body 1 and the instrument chassis 112 for fine-tuning the levelness of the instrument body 1.

[0042] Furthermore, after the entire instrument body 1 is fixed, the foot screw 113 is rotated and the bubble indicator 111 is observed until the bubble in the bubble indicator 111 is located at the center position, and the leveling of the entire instrument body 1 is completed to carry out the next step of surveying and mapping.

[0043] Specifically, the support device includes a main leg 3 and a support foot 4, the connecting block 12 is provided with a rotation groove 120, the main leg 3 is rotatably connected to the corresponding rotation groove 120, the support foot 4 is inserted into the inside of the main leg 3, and a positioning bolt 6 is threadedly inserted into the outer wall of one side of the main leg 3, and the positioning bolt 6 passes through a side wall of the main leg 3 and can contact the outer wall of one side of the support foot 4, the bottom of the support foot 4 is fixedly sleeved with a fixed bottom block 8, and a pedal 7 is hinged to the outer wall of one side of the fixed bottom block 8, and a positioning cone is fixed to the bottom of the fixed bottom block 8.

[0044] During initial placement, directly open the main support leg 3 for support, release the fixing effect of the positioning bolt 6, extend the support leg 4, adjust the main support ring plate 2 to the optimal height for observation, tighten the positioning bolt 6 and step on the pedal 7 with your foot to stabilize and fix the entire three supports.

[0045] The present invention also provides another form of level determination method. In case of human error in operation, if the initial calibration is not performed within the adjustable range of the foot screw 113, there is no need to disassemble the already fixed instrument body 1 again. A heavy object can be directly hung on the hook 151 to increase the weight of the hanging weight handle 15, and the toggle gear 10 can be rotated to make the calibration spherical disk 16 fall on the high-strength rolling ball 17. When the total weight of the hanging object and the hanging weight handle 15 is higher than the weight of the instrument body 1, it can be observed whether the disk extension 161 is in contact with the instrument support plate 9. If the disk extension 161 is in contact with the instrument support plate 9, the support device 10 is not in contact with the instrument body 1. After the initial fixation, the instrument support plate 9 deviates from the horizontal line to a large extent, and the support needs to be readjusted; if the disk extension 161 is not in contact with the instrument support plate 9, the entire instrument support plate 9 is relatively horizontal after the initial fixation of the support. This method depends on the radius of the disk extension 161. If the radius of the disk extension 161 is larger, the disk extension 161 is easier to contact with the instrument support plate 9. Even if the instrument support plate 9 deviates from the horizontal line to a small extent, the contact between the disk extension 161 and the instrument support plate 9 can be observed. At this time, the adjustment limit requirement for the foot screw 113 is lower, and leveling can be performed more accurately and conveniently.

[0046] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A surveying instrument positioning device for engineering surveying and mapping, comprising a main support ring plate (2), characterized in that: The main support ring plate (2) is provided with three connection grooves (201) at the bottom, each of the connection grooves (201) having a connection block (12) movably arranged therein, and each of the connection blocks (12) having a support movably mounted thereon, an inner fixed fan plate (25) being fixed to the inner peripheral wall of the main support ring plate (2) by screws, an inner support ring (19) being fixed to the top outer wall of the inner fixed fan plate (25), and a passive gear ring (19) being rotatably connected to the top of the inner support ring (19). 8), a bearing ring (23) is fixed to the inner peripheral wall of the passive gear ring (18), a rolling groove (230) is formed on the inner wall of the bearing ring (23), a plurality of high-strength rolling balls (17) are installed inside the rolling groove (230), an inner ring clamp (231) is integrally formed on the inner peripheral wall of the bearing ring (23), a transmission ring (22) is fixed to the inner peripheral wall of the inner fixed fan plate (25), and a threaded top ring (24) is inserted into the inner wall of the transmission ring (22) through a thread ), a passive groove (240) is formed on the outer peripheral wall of the threaded top ring (24), and the inner ring clamp (231) can be inserted into the passive groove (240), a calibration spherical disk (16) is placed on the top of a plurality of the high-strength rolling balls (17), and when the threaded top ring (24) is raised, it can contact the bottom surface of the calibration spherical disk (16), and the outer peripheral wall of the calibration spherical disk (16) is also integrally formed with a disk extension (161), and the calibration spherical disk (16) is rotatably connected to the top of the threaded top ring (24). A dual-purpose fixing rod (14) is connected, the top of the dual-purpose fixing rod (14) is threaded, the bottom of the dual-purpose fixing rod (14) is welded with a hanging weight handle (15), the bottom of the hanging weight handle (15) is integrally formed with a hook (151), the main support ring plate (2) is also provided with a tooth groove (200), a toggle tooth (10) is rotatably connected in the tooth groove (200), and the toggle tooth (10) is meshed with the passive gear ring (18); A plurality of fixing pins (13) are fixed to the top outer wall of the main support ring plate (2), and the same instrument support plate (9) is sleeved on all the fixing pins (13). A plurality of springs (26) are provided between the instrument support plate (9) and the main support ring plate (2), and the springs (26) are sleeved on the periphery of the fixing pins (13), and a calibration hole (90) is provided at the center of the instrument support plate (9), and a dual-purpose fixing rod (14) can penetrate the calibration hole (90) and extend to the top of the instrument support plate (9); The conditions for being in a horizontal position without obstruction are: the initial disc extension (161) of the calibration spherical disc (16) does not contact the instrument support plate (9), and the dual-purpose fixing rod (14) does not contact the inner peripheral wall of the threaded top ring (24), and the dual-purpose fixing rod (14) does not contact the calibration hole (90).

2. The positioning device for a surveying instrument for engineering surveying and mapping according to claim 1, characterized in that: The outer wall of the bearing ring (23) is connected to a lifting ring (21) via a threaded sleeve, and the bottom of the bearing ring (23) is integrally formed with three slotted extension plates (211), each of the slotted extension plates (211) is slidably connected to a selective sliding card (20), and the selective sliding card (20) can contact the outer wall of one side of the connecting block (12).

3. The positioning device for a surveying instrument for engineering surveying and mapping according to claim 1, characterized in that: The top of the dual-purpose fixing rod (14) can be threadedly plugged into the instrument chassis (112), and the instrument body (1) is fixedly mounted on the top of the dual-purpose fixing rod (14). A bubble indicator (111) is provided on the top of the instrument body (1), and a foot screw (113) is also provided between the instrument body (1) and the instrument chassis (112) for fine-tuning the horizontality of the instrument body (1).

4. The positioning device for a surveying instrument for engineering surveying and mapping according to claim 1, characterized in that: The outer walls on both sides of the connection block (12) are integrally formed with connection slide bars (121), and the inner walls of each of the connection slots (201) are provided with slide grooves (2010) on both sides. The connection slide bar (121) can slide in the slide groove (2010), and a second spring (122) is provided between the connection slide bar (121) and the inner wall of the slide groove (2010), so that the second spring (122) can be stretched when the connection block (12) is pushed.

5. The surveying instrument positioning device for engineering surveying and mapping according to claim 1, characterized in that: The support device comprises a main leg (3) and a support foot (4); the connection block (12) is provided with a rotation groove (120); the main leg (3) is rotationally connected to the corresponding rotation groove (120); the support foot (4) is inserted into the interior of the main leg (3); a positioning bolt (6) is threadedly inserted into an outer wall of one side of the main leg (3); the positioning bolt (6) penetrates a side wall of the main leg (3) and can contact an outer wall of one side of the support foot (4); a fixed bottom block (8) is fixedly sleeved at the bottom of the support foot (4); a pedal (7) is hingedly connected to an outer wall of one side of the fixed bottom block (8); and a positioning cone is fixed to the bottom of the fixed bottom block (8).

6. The positioning device for a surveying instrument for engineering surveying and mapping according to claim 2, characterized in that: A sliding card toggle handle (2001) is integrally formed at the bottom of the selective sliding card (20), and an outer side wall of the selective sliding card (20) is provided with an outer convex curved surface (202) for contacting and pushing out the connection block (12) toward the periphery.

Images