阅读说明：本技术 一种基于卫星定位系统的测绘仪 (Surveying instrument based on satellite positioning system ) 是由 李静娴 卞婷玉 王益 李�东 于 2021-07-08 设计创作，主要内容包括：本发明涉及测绘仪器技术领域,具体的说是一种基于卫星定位系统的测绘仪,包括开镜机构、支架机构、支撑机构、清扫机构,开镜机构通过顺时针转动转把进而使镜盖打开,同时第一转杆带动螺杆转动,螺杆转动使螺桶向下移动从而使第一支脚打开,当逆时针转动转把时镜盖会将测绘仪盖住,防止灰尘落至测绘仪镜片上,同时第一支脚也会被折叠起来,当测绘仪在土质松软的泥沙或者淤泥环境中使用时拉动第二支脚,第二支脚内部钢丝绳会拉动撑架,撑架展开会带动撑布展开,撑布展开会使第二支脚支撑力增大,这样第二支脚在土质松软的泥沙或者淤泥的环境中使用时不至于轻易被陷下去,在测绘仪遮雨板收起时雨刷会沿着导向槽对遮雨板上的雨水进行清扫。(The invention relates to the technical field of surveying instruments, in particular to a surveying instrument based on a satellite positioning system, which comprises a mirror opening mechanism, a support mechanism, a supporting mechanism and a cleaning mechanism, wherein the mirror opening mechanism opens a mirror cover by clockwise rotating a rotating handle, simultaneously a first rotating rod drives a screw rod to rotate, the screw rod rotates to enable a screw barrel to move downwards so as to open a first supporting leg, the mirror cover covers the surveying instrument when the rotating handle is anticlockwise rotated so as to prevent dust from falling onto a lens of the surveying instrument, the first supporting leg can be folded, when the surveying instrument is used in a soft soil sediment or silt environment, a second supporting leg is pulled, a steel wire rope in the second supporting leg pulls a support, the support can be unfolded to drive a support cloth, the support cloth is unfolded to increase the supporting force of the second supporting leg, so that the second supporting leg cannot be easily sunk when the surveying instrument is used in the soft soil sediment or silt environment, when the surveying instrument flashing is folded, the windshield wiper can clean rainwater on the flashing along the guide groove.)

1. A surveying instrument based on a satellite positioning system is characterized in that; the device comprises a mirror opening mechanism (1), a support mechanism (2), a supporting mechanism (3) and a cleaning mechanism (4), wherein the support mechanism (2) is arranged at the lower end of the mirror opening mechanism (1), the supporting mechanism (3) is arranged on the periphery of the support mechanism (2), and the cleaning mechanism (4) is arranged at the upper end of the mirror opening mechanism (1).

Open mirror mechanism (1) including changeing (11), change (11) and a section fixed connection of pivot (12), be equipped with worm (13) in the middle of pivot (12), worm (13) are equipped with first straight-teeth gear (14) for one section, in the middle of first straight-teeth gear (14) with first bull stick (15) fixed connection, fixed connection in the middle of first bull stick (15) and second straight-teeth gear (16), second straight-teeth gear (16) lateral wall closely laminates with first rack (17), first rack (17) one section and rotating pin (18) fixed connection, rotating pin (18) and first movable rod (19) swing joint, in the middle of first movable rod (19) with rotating pin (110) swing joint, rotating pin (110) lateral wall and first supporter (112) swing joint, first supporter (112) one end and third supporter (44) fixed connection, one end of the first movable rod (19) is fixedly connected with the mirror cover (111).

2. A satellite positioning system based surveying instrument according to claim 1, characterized by; the support mechanism (2) comprises a screw rod (21), the screw rod (21) is sleeved inside a screw barrel (22), the side wall of the screw barrel (22) is movably connected with a first twisting pin (23), the first twisting pin (23) is fixedly connected with a second movable rod (24), one end of the second movable rod (24) is movably connected with a second twisting pin (25), the second twisting pin (25) is fixedly connected with one end of a third movable rod (26), one side of the third movable rod (26) is sleeved inside a first sliding rod (27), the first sliding rod (27) is sleeved inside a first supporting leg (28), one end of the first supporting leg (28) is fixedly connected with a third twisting pin (29), the third twisting pin (29) is fixedly connected with one end of a connecting block (211), and one end of the connecting block (211) is fixedly connected with a third supporting body (44).

3. A satellite positioning system based surveying instrument according to claim 2, characterized in that: supporting mechanism (3) include second stabilizer blade (31), second stabilizer blade (31) inside is equipped with wire rope (32), wire rope (32) closely laminate with activity wheel (33), in the middle of activity wheel (33) with second bull stick (34) fixed connection, second bull stick (34) both ends and second stabilizer blade (31) fixed connection, wire rope (32) one end and strut (35) fixed connection, in the middle of strut (35) with third bull stick (37) fixed connection, third bull stick (37) both ends and second supporter (38) fixed connection, second supporter (38) one end and second stabilizer blade (31) fixed connection, strut (35) lateral wall and prop cloth (36) fixed connection.

4. A satellite positioning system based surveying instrument according to claim 3, characterized by: cleaning mechanism (4) including crank (41), fixed connection in the middle of crank (41) and third straight-teeth gear (42), third straight-teeth gear (42) lateral wall and second rack (43) closely laminate, inside third supporter (44) is located to second rack (43) cover, second rack (43) upper end and elevating platform (45) fixed connection, elevating platform (45) upper end is equipped with surveying instrument (46), elevating platform (45) lateral wall and flexible bucket (47) fixed connection, the inside cover of flexible bucket (47) is equipped with telescopic link (48), telescopic link (48) one end and dash board (49) fixed connection, dash board (49) and first support column (411) one end fixed connection, first support column (411) lateral wall and second litter (412) fixed connection, inside slider (413) was located to second litter (412) cover, the lower end of the sliding block (413) is fixedly connected with a wiper (414), one end of the wiper (414) is sleeved inside the guide groove (415), the guide groove (415) is fixedly connected with one end of the second supporting column (416), and one end of the second supporting column (416) is fixedly connected with the third supporting body (44).

Technical Field

The invention relates to the technical field of surveying and mapping instruments, in particular to a surveying and mapping instrument based on a satellite positioning system.

Background

The engineering measurement technology has the advantages that various instruments in the aspects of orientation, distance measurement, angle measurement, height measurement, photogrammetry and the like required by measurement work in the planning and design, construction and operation management stages in engineering construction, the service field of the engineering measurement technology comprises departments such as buildings, water conservancy, traffic, mines and the like, and the basic content of the engineering measurement technology comprises two parts of mapping and lofting.

Pipeline surveying instrument is generally all put when using and is measured on the surveying instrument support, traditional surveying instrument generally is to place the surveying instrument after the survey and drawing and preserves in the appointed box, often directly hold the surveying instrument and remove at short distance survey and drawing removal in-process, the surveying instrument lens can receive the pollution of dust like this, thereby influence measured data, dash board on rainy day surveying instrument can persist a lot of rainwater, directly place appointed equipment like this and preserve and can influence equipment life, the support can be because the holding power is not enough and the subsides when the tripod of surveying instrument uses in the soft silt of soil property or silt environment, can lead to the measured data inaccuracy like this.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a surveying instrument based on a satellite positioning system.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a surveying instrument based on a satellite positioning system, which comprises a mirror opening mechanism, a support mechanism, a supporting mechanism and a cleaning mechanism, wherein the support mechanism is arranged at the lower end of the mirror opening mechanism, the supporting mechanism is arranged at the periphery of the support mechanism, and the cleaning mechanism is arranged at the upper end of the mirror opening mechanism; open mirror mechanism rotates the drive worm through rotating, thereby spur first movable rod, first movable rod rotates and can open the mirror lid or close, first stabilizer blade is also expanded because of spiral shell bucket downstream simultaneously, supporting mechanism moves through spur second stabilizer blade wire rope, wire rope spur strut motion, the strut can be strutted, the strut struts and can drive the opening of propping cloth, prop cloth and can produce the holding power to the second stabilizer blade and make it be unlikely to be sunk easily in the soft silt of soil property or silt environment, it can protect the surveying instrument through the dash board to clean the mechanism, it receives the damage to prevent that rainy day from drenching to the rainwater surveying instrument, the windshield wiper can clean the rainwater on the dash board when packing up the dash board.

Specifically, the mirror opening mechanism comprises a rotating handle, the rotating handle is fixedly connected with one section of a rotating shaft, a worm is arranged in the middle of the rotating shaft, a first straight gear is arranged in one section of the worm, the middle of the first straight gear is fixedly connected with a first rotating rod, the middle of the first rotating rod is fixedly connected with a second straight gear, the side wall of the second straight gear is tightly attached to a first rack, one section of the first rack is fixedly connected with a rotating pin, the rotating pin is movably connected with a first movable rod, the middle of the first movable rod is movably connected with a rotating pin, the side wall of the rotating pin is movably connected with a first support body, one end of the first support body is fixedly connected with a third support body, and one end of the first movable rod is fixedly connected with a mirror cover; the rotating handle is rotated to drive the rotating shaft to rotate, the rotating shaft rotates to drive the worm to rotate, the worm rotates to drive the first straight gear to rotate, the first straight gear rotates to drive the first rotating rod to rotate, the first rotating rod rotates to drive the second straight gear to rotate, the second straight gear rotates to drive the first rack to move, the first rack moves to drive the first movable rod to move leftwards, the first movable rod can rotate around the rotating pin, and the first movable rod moves leftwards to pull the mirror cover to be opened.

Specifically, the support mechanism comprises a screw rod, the screw rod is sleeved inside the screw barrel, the side wall of the screw barrel is movably connected with a first twisting pin, the first twisting pin is fixedly connected with a second movable rod, one end of the second movable rod is movably connected with a second twisting pin, the second twisting pin is fixedly connected with one end of a third movable rod, one side of the third movable rod is sleeved inside a first sliding rod, the first sliding rod is sleeved inside the first supporting rod, one end of the first supporting rod is fixedly connected with the third twisting pin, the third twisting pin is fixedly connected with one end of a connecting block, and one end of the connecting block is fixedly connected with a third supporting body; first pivot pole rotates and drives the screw rod and rotates, the screw rod rotates and drives the spiral shell barrel downstream, the spiral shell barrel downstream drives first torsion round pin downstream, first torsion round pin downstream drives the second movable rod downstream, the second movable rod downstream drives the second torsion round pin downstream, the second torsion round pin downstream drives the third movable rod downstream, third movable rod downstream can expand first stabilizer blade, the mirror lid can be opened when clockwise rotation changes the handle, simultaneously first stabilizer blade also can launch simultaneously, the mirror lid can be covered on the surveying instrument when anticlockwise rotation changes the handle, prevent that the surveying instrument lens from receiving the pollution of dust, simultaneously first stabilizer blade also can be placed in the case by folding convenience.

Specifically, the supporting mechanism comprises a second supporting leg, a steel wire rope is arranged in the second supporting leg, the steel wire rope is tightly attached to a movable wheel, the middle of the movable wheel is fixedly connected with a second rotating rod, two ends of the second rotating rod are fixedly connected with the second supporting leg, one end of the steel wire rope is fixedly connected with a support frame, the middle of the support frame is fixedly connected with a third rotating rod, two ends of the third rotating rod are fixedly connected with a second supporting body, one end of the second supporting body is fixedly connected with the second supporting leg, and the side wall of the support frame is fixedly connected with a supporting cloth; when the surveying instrument is used in a soft soil sediment or sludge environment, the second support leg is likely to sink, so that the second support leg is pulled out of the first support leg, the steel wire rope pulls the support frame to prop open, the support frame drives the support cloth to prop open, the support cloth props open to increase the supporting force of the second support leg, the second support leg is unlikely to sink easily in the soft soil sediment or sludge environment, the first support leg is folded, the second support leg is pulled to be folded, and the support cloth is manually folded.

Specifically, the cleaning mechanism comprises a crank, the crank is fixedly connected with the middle of a third straight gear, the side wall of the third straight gear is tightly attached with a second rack which is sleeved inside the third supporting body, the upper end of the second rack is fixedly connected with a lifting platform, the upper end of the lifting platform is provided with a surveying instrument, the side wall of the lifting platform is fixedly connected with a telescopic barrel, a telescopic rod is sleeved in the telescopic barrel, one end of the telescopic rod is fixedly connected with a rain shield, the rain shield is fixedly connected with one end of a first support column, the side wall of the first support column is fixedly connected with a second slide rod, the second slide rod is sleeved in the slide block, the lower end of the sliding block is fixedly connected with a windshield wiper, one end of the windshield wiper is sleeved in the guide groove, the guide groove is fixedly connected with one end of the second supporting column, and one end of the second supporting column is fixedly connected with the third supporting body; rotate the crank, the crank rotates and drives the rotation of third straight-toothed gear, the rotation of third straight-toothed gear drives the motion of second rack, the motion of second rack drives the surveying instrument motion, dash board is not drenched for the surveying instrument in rainy day and leads to damaging, when the whole case that will put back to the surveying instrument of plotting instrument downwards stimulates dash board, the windshield wiper can be along with the guide way motion, the windshield wiper can clean the rainwater on the dash board, can reduce the rainwater on the dash board like this.

The invention has the beneficial effects that:

(1) according to the surveying instrument based on the satellite positioning system, the mirror opening mechanism enables the mirror cover to be opened by clockwise rotating the rotating handle, the first rotating rod drives the screw rod to rotate, the screw rod rotates to enable the screw barrel to move downwards so as to enable the first supporting leg to be opened, the mirror cover covers the surveying instrument when the rotating handle is anticlockwise rotated, dust is prevented from falling onto a lens of the surveying instrument, and meanwhile the first supporting leg is also folded.

(2) According to the surveying instrument based on the satellite positioning system, when the surveying instrument is used in a soft soil sediment or sludge environment, the second support leg is pulled, the steel wire rope in the second support leg can pull the support frame, the support frame can drive the support cloth to be unfolded, the support cloth can be unfolded to increase the supporting force of the second support leg, and therefore the second support leg cannot be easily sunk when the surveying instrument is used in the soft soil sediment or sludge environment.

(3) According to the surveying instrument based on the satellite positioning system, a rain shield on the surveying instrument in rainy days can store a lot of rainwater, so that the service life of equipment can be influenced by directly placing and storing specified equipment, and therefore when the rain shield of the surveying instrument is folded, a windshield wiper can clean the rainwater on the rain shield along the guide groove.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure provided by the present invention;

FIG. 2 is a cross-sectional view of a portion of the structure shown in FIG. 1;

FIG. 3 is a schematic view of a connection structure of the worm and the first straight gear shown in FIG. 2;

fig. 4 is a schematic view illustrating a connection structure of the second spur gear and the first rack shown in fig. 2;

FIG. 5 is an enlarged view of portion A of FIG. 2;

fig. 6 is a schematic view illustrating a connection structure of the third spur gear and the second rack shown in fig. 5;

in the figure: 1. a mirror opening mechanism; 11. turning a handle; 12. a rotating shaft; 13. a worm; 14. a first straight gear; 15. a first rotating lever; 16. a second spur gear; 17. a first rack; 18. a rotation pin; 19. a first movable bar; 110. a rotation pin; 111. a mirror cover; 112. a first support; 2. a support mechanism; 21. a screw; 22. a spiral barrel; 23. a first torsion pin; 24. a second movable bar; 25. a second twist pin; 26. a third movable bar; 27. a first slide bar; 28. a first leg; 29. a third twist pin; 211. connecting blocks; 3. a support mechanism; 31. a second leg; 32. a wire rope; 33. a movable wheel; 34. a second rotating rod; 35. a support frame; 36. cloth supporting; 37. a third rotating rod; 38. a second support; 4. a cleaning mechanism; 41. a crank; 42. a third spur gear; 43. a second rack; 44. a third support; 45. a lifting platform; 46. a surveying instrument; 47. a telescopic barrel; 48. a telescopic rod; 49. a flashing; 411. a first support column; 412. a second slide bar; 413. a slider; 414. a wiper; 415. a guide groove; 416. and a second support column.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-6, the surveying instrument based on the satellite positioning system comprises a mirror opening mechanism 1, a support mechanism 2, a support mechanism 3 and a cleaning mechanism 4, wherein the support mechanism 2 is arranged at the lower end of the mirror opening mechanism 1, the support mechanism 3 is arranged at the periphery of the support mechanism 2, and the cleaning mechanism 4 is arranged at the upper end of the mirror opening mechanism 1; open mirror mechanism 1 and rotate 11 through rotating and drive worm 13 and rotate, thereby stimulate first movable rod 19, first movable rod 19 rotates and can open or close mirror lid 111, first leg 28 also is expanded because of the downstream of spiral shell bucket 22 simultaneously, supporting mechanism 3 moves through pulling second leg 31 wire rope 32, wire rope 32 stimulates strut 35 motion, strut 35 can be strutted, strut 35 struts and can drive and prop up cloth 36 and strut, prop up cloth 36 and can produce the holding power to second leg 31 and make it unlikely to be easily sunken in the soft silt of soil matter or silt environment, cleaning mechanism 4 can protect the surveying instrument through dash board 49, prevent that rainy day from drenching on the rainwater surveying instrument and receive the damage, wiper 414 can clean the rainwater on dash board 49 when dash board 49 is packed up.

Specifically, the mirror opening mechanism 1 includes a rotating handle 11, the rotating handle 11 is fixedly connected to one section of a rotating shaft 12, a worm 13 is arranged in the middle of the rotating shaft 12, one section of the worm 13 is provided with a first straight gear 14, the middle of the first straight gear 14 is fixedly connected to a first rotating rod 15, the middle of the first rotating rod 15 is fixedly connected to the middle of a second straight gear 16, the side wall of the second straight gear 16 is tightly attached to a first rack 17, one section of the first rack 17 is fixedly connected to a rotating pin 18, the rotating pin 18 is movably connected to a first movable rod 19, the middle of the first movable rod 19 is movably connected to the rotating pin 110, the side wall of the rotating pin 110 is movably connected to a first support 112, one end of the first support 112 is fixedly connected to a third support 44, and one end of the first movable rod 19 is fixedly connected to a mirror cover 111; the rotating handle 11 is rotated, the rotating handle 11 rotates to drive the rotating shaft 12 to rotate, the rotating shaft 12 rotates to drive the worm 13 to rotate, the worm 13 rotates to drive the first straight gear 14 to rotate, the first straight gear 14 rotates to drive the first rotating rod 15 to rotate, the first rotating rod 15 rotates to drive the second straight gear 16 to rotate, the second straight gear 16 rotates to drive the first rack 17 to move, the first rack 17 moves to drive the first movable rod 19 to move leftwards, the first movable rod 19 can rotate around the rotating pin 110, and the first movable rod 19 moves leftwards to pull the mirror cover 111 to be opened.

Specifically, the support mechanism 2 includes a screw rod 21, the screw rod 21 is sleeved inside a screw barrel 22, a side wall of the screw barrel 22 is movably connected with a first twisting pin 23, the first twisting pin 23 is fixedly connected with a second movable rod 24, one end of the second movable rod 24 is movably connected with a second twisting pin 25, the second twisting pin 25 is fixedly connected with one end of a third movable rod 26, one side of the third movable rod 26 is sleeved inside a first slide rod 27, the first slide rod 27 is sleeved inside a first support leg 28, one end of the first support leg 28 is fixedly connected with a third twisting pin 29, the third twisting pin 29 is fixedly connected with one end of a connection block 211, and one end of the connection block 211 is fixedly connected with a third support 44; the first rotating rod 15 rotates to drive the screw rod 21 to rotate, the screw rod 21 rotates to drive the screw barrel 22 to move downwards, the screw barrel 22 moves downwards to drive the first twisting pin 23 to move downwards, the first twisting pin 23 moves downwards to drive the second movable rod 24 to move downwards, the second movable rod 24 moves downwards to drive the second twisting pin 25 to move downwards, the second twisting pin 25 moves downwards to drive the third movable rod 26 to move downwards, the third movable rod 26 moves downwards to unfold the first support leg 28, the mirror cover 111 is opened when the rotating handle 11 rotates clockwise, the first support leg 28 is unfolded simultaneously, the mirror cover 111 is covered on the surveying instrument 46 when the rotating handle 11 rotates anticlockwise to prevent the surveying instrument from being polluted by dust, and the first support leg 28 is folded to be conveniently placed in the box.

Specifically, the supporting mechanism 3 includes a second supporting leg 31, a steel wire rope 32 is arranged inside the second supporting leg 31, the steel wire rope 32 is tightly attached to a movable wheel 33, the middle of the movable wheel 33 is fixedly connected with a second rotating rod 34, two ends of the second rotating rod 34 are fixedly connected with the second supporting leg 31, one end of the steel wire rope 32 is fixedly connected with a supporting frame 35, the middle of the supporting frame 35 is fixedly connected with a third rotating rod 37, two ends of the third rotating rod 37 are fixedly connected with a second supporting body 38, one end of the second supporting body 38 is fixedly connected with the second supporting leg 31, and the side wall of the supporting frame 35 is fixedly connected with a supporting cloth 36; when the surveying instrument is used in a soft soil sediment or sludge environment, the second support leg 31 is likely to sink, so that the second support leg 31 is pulled out of the first support leg 28, the steel wire rope 32 pulls the support frame 35 to prop open, the support frame 35 drives the supporting cloth 36 to prop open, the supporting force of the second support leg 31 is increased by propping open the supporting cloth 36, the second support leg 31 is not likely to sink in the soft soil sediment or sludge environment, and when the first support leg 28 is folded, the second support leg 31 is pulled to fold, and at the moment, the supporting cloth 36 is manually folded.

Specifically, clean mechanism 4 including crank 41, fixed connection in the middle of crank 41 and third straight-teeth gear 42, third straight-teeth gear 42 lateral wall and the inseparable laminating of second rack 43, second rack 43 cover is located inside third supporter 44, second rack 43 upper end and elevating platform 45 fixed connection, elevating platform 45 upper end is equipped with surveying instrument 46, elevating platform 45 lateral wall and telescopic bucket 47 fixed connection, the inside cover of telescopic bucket 47 is equipped with telescopic link 48, telescopic link 48 one end and dash board 49 fixed connection, dash board 49 and first support column 411 one end fixed connection, first support column 411 lateral wall and second litter 412 fixed connection, inside slider 413 is located to second litter 412 cover, slider 413 lower extreme and wiper 414 fixed connection, wiper 414 pot is located inside guide way 415, guide way 415 and second support column 416 one end fixed connection, one end of the second supporting column 416 is fixedly connected with the third supporting body 44; rotate crank 41, crank 41 rotates and drives third spur gear 42 and rotate, third spur gear 42 rotates and drives second rack 43 motion, second rack 43 motion drives surveying instrument 46 motion, dash board 49 is for surveying instrument 46 not drenched and lead to damaging in rainy day, when surveying instrument wholly will put back the case downwards pulling dash board 49, windshield wiper 414 can be along with the guide way 415 motion, windshield wiper 414 can clean the rainwater on dash board 414, can reduce the rainwater on dash board 49 like this.

When the invention is used, firstly, the rotating handle 11 is rotated to drive the rotating shaft 12 to rotate, the rotating shaft 12 is rotated to drive the worm 13 to rotate, the worm 13 is rotated to drive the first straight gear 14 to rotate, the first straight gear 14 is rotated to drive the first rotating rod 15 to rotate, the first rotating rod 15 is rotated to drive the second straight gear 16 to rotate, the second straight gear 16 is rotated to drive the first rack 17 to move, the first rack 17 moves to drive the first movable rod 19 to move leftwards, the first movable rod 19 can rotate around the rotating pin 110, the first movable rod 19 moves leftwards to pull the mirror cover 111 to open, simultaneously, the first rotating rod 15 rotates to drive the screw 21 to rotate, the screw 21 rotates to drive the screw barrel 22 to move downwards, the screw barrel 22 moves downwards to drive the first torsion pin 23 to move downwards, the first torsion pin 23 moves downwards to drive the second movable rod 24 to move downwards, the second movable rod 24 moves downwards to drive the second torsion pin 25 to move downwards, the second twist pin 25 moves downwards to drive the third movable rod 26 to move downwards, the third movable rod 26 moves downwards to unfold the first support leg 28, the mirror cover 111 is opened when the rotating handle 11 rotates clockwise, the first support leg 28 is unfolded simultaneously, the mirror cover 111 is covered on the surveying instrument 46 when the rotating handle 11 rotates anticlockwise to prevent the lens of the surveying instrument from being polluted by dust, meanwhile, the first support leg 28 is folded to be conveniently placed in the box, when the surveying instrument is used in a soft soil silt or silt environment, the second support leg 31 is likely to sink, so that when the second support leg 31 is pulled out from the first support leg 28, the steel wire rope 32 pulls the bracket 35 to prop open, the bracket 35 drives the supporting cloth 36 to prop open, the supporting cloth 36 props open to increase the supporting force of the second support leg 31, and the second support leg 31 is unlikely to sink in the soft soil silt or silt environment, when the first support leg 28 is folded, the second support leg 31 is pulled to be folded, at the moment, the cloth 36 is manually folded, the crank 41 is rotated to drive the third straight gear 42 to rotate, the third straight gear 42 is rotated to drive the second rack 43 to move, the second rack 43 moves to drive the surveying instrument 46 to move, the rain shielding plate 49 is damaged because the surveying instrument 46 is not wetted in rainy days, when the surveying instrument is integrally placed back to a box, the rain shielding plate 49 is pulled downwards, the rain wiper 414 moves along with the guide groove 415, the rain wiper 414 cleans rain on the rain shielding plate 414, and thus rain on the upper end of the rain shielding plate 49 can be reduced.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.