A laying-out device for land engineering surveying and mapping

Abstract

The present invention relates to the field of engineering surveying technology and discloses a line-laying device for land engineering surveying and mapping, comprising a tripod, the top of the tripod being fixedly connected to an adjustment portion, the upper surface of the adjustment portion being fixedly connected to an organic body; the adjustment portion comprising a base, the lower surface of the base being fixedly connected to the top of the tripod, the upper surface of the base being rotatably connected to a rotating ring frame, the top of the rotating ring frame being fixedly connected to a first block, and the rotating ring frame being rotatably connected to a first shaft via the first block. This line-laying device for land engineering surveying and mapping can effectively solve the problems in the prior art, such as the difficulty for workers to complete the leveling adjustment of a total station at the same position, the low adjustment efficiency, and the difficulty for workers to move freely around the tripod due to the influence of construction, which restricts the workers' operating movements and reduces their operating efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering surveying, and in particular to a line-laying device for land engineering surveying and mapping. Background Art

[0002] Land engineering surveying is the measurement and description of the spatial position, geometric shape, size and related attributes of various engineering objects on land. In construction projects, total stations are usually used to accurately place points on design drawings (such as building foundations, road centerlines, pile positions, etc.) on the ground to achieve accurate conversion of design intent, thereby effectively controlling key indicators such as the verticality of buildings and the slope of roads.

[0003] At present, when using a total station, a worker is required to install the total station on a tripod and be located at different positions relative to the tripod to complete multiple leveling operations on the total station to ensure that the vertical axis of the instrument is in a plumb state. However, since the worker is required to be located at different positions relative to the tripod to perform leveling operations on the total station, it is difficult for the worker to be located at the same position to complete the leveling adjustment of the total station, resulting in low adjustment efficiency. In addition, due to the influence of construction, it is difficult for the worker to move freely around the tripod, which in turn restricts the worker's operating movements and reduces the worker's operating efficiency. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a line-laying device for land engineering surveying and mapping, which can effectively solve the problems in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a line-setting device for land engineering surveying and mapping, comprising:

[0007] A tripod, wherein the top of the tripod is fixedly connected to an adjusting portion, and the upper surface of the adjusting portion is fixedly connected to the organism;

[0008] The adjusting part includes a base, the lower surface of the base is fixedly connected to the top of the tripod, the upper surface of the base is rotatably connected to a rotating ring frame, the top of the rotating ring frame is fixedly connected to a first block, the rotating ring frame is rotatably connected to the first shaft body through the first block, a rotating strip plate is rotatably sleeved on the outer circumference of the first shaft body, two ends of the rotating strip plate are commonly fixedly connected to the first ring body, the top of the first ring body is fixedly connected to the second block, the first ring body is rotatably connected to the second shaft body through the second block, the outer circumference of the second shaft body is fixedly connected to the connecting strip plate, two ends of the connecting strip plate are commonly fixedly connected to the second ring body, the top of the second ring body is fixedly connected to a top plate, and the upper surface of the top plate is fixedly connected to the lower surface of the machine body;

[0009] The outer circumferential surface of the rotating ring frame is fixedly connected with a rotating arc body, and the rotating arc bodies are provided with four and are distributed in a circular array on the outer circumferential surface of the rotating ring frame. A lifting and pressing block is slidably connected between two adjacent rotating arc bodies, and an elastic telescopic block is provided below the lifting and pressing block;

[0010] The upper surface of the base is rotatably connected to a rotating part, and the rotating part includes a rotating ring bar, the bottom of the rotating ring bar is rotatably connected to the upper surface of the base, the top of the rotating ring bar is fixedly connected to a vertical rod, and the circumferential outer surface of the vertical rod is slidably sleeved with a lifting ring plate, and the top of the lifting ring plate is provided with an annular gear row;

[0011] The inner wall of the first ring body is fixedly connected to a horizontal plate, the bottom of the horizontal plate is fixedly connected to a triangular block, the outer surface of the triangular block is rotatably connected to a movable rod, the top of the rotating ring frame is rotatably connected to a first screw, the circumferential outer surface of the first screw is threadedly sleeved with a U-shaped push-pull piece, the end of the movable rod away from the triangular block is rotatably connected to the U-shaped push-pull piece, the end of the first screw away from the first shaft body is fixedly connected to a first gear, and the first gear is meshed with the annular gear row.

[0012] Furthermore, the inner wall of the rotating ring frame is fixedly connected to a first slide rail, and the bottom end of the U-shaped push-pull member is slidably connected to the first slide rail.

[0013] Furthermore, the top of the first ring body is rotatably connected to a limiting rod body, the circumferential outer surface of the limiting rod body is sleeved with a trapezoidal block, and the top of the trapezoidal block is provided with limiting teeth, and the circumferential outer surface of the second shaft body is fixedly connected to a limiting gear, and the limiting gear is meshingly connected with the limiting teeth.

[0014] Furthermore, a thread is provided on the circumferential outer surface of the limiting rod body, and the limiting rod body is connected to the trapezoidal block through its threaded surface.

[0015] Furthermore, both ends of the limiting rod body are fixedly connected to a transmission gearwheel, the circumferential outer surface of the first shaft body is rotatably connected to a transmission pinion, and the transmission gearwheel is meshed with the transmission pinion.

[0016] Furthermore, a telescopic groove is provided on the upper surface of the base, and the base is slidably connected to an elastic telescopic rod through the telescopic groove, and the top end of the elastic telescopic rod contacts the lower surface of the lifting ring plate.

[0017] Furthermore, the top end of the elastic telescopic rod is rotatably connected to a support wheel, and the elastic telescopic rod is in contact with the lifting ring plate through the support wheel.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention sets a lifting ring plate, rotates the lifting ring plate, the lifting ring plate drives the annular gear row to rotate, the annular gear row drives the first gear and the first screw to rotate, the first screw drives the U-shaped push-pull member to slide along the first slide rail, the U-shaped push-pull member drives the bottom end of the movable rod to slide along the first slide rail, so that the top end of the movable rod drives the triangular block, the horizontal plate and the first ring body to rotate around the axis of the first shaft body, thereby adjusting the angle of the first ring body so that the bubble of the long level on the machine body is in the middle position.

[0020] The present invention provides a lifting ring plate, presses the lifting ring plate downward, and the lifting ring plate drives the lifting pressure block and the elastic telescopic block to move downward, releasing the elastic telescopic block from limiting the rotating arc body (the rotating ring frame can rotate on the upper surface of the base). At this time, the top ends of the four lifting pressure blocks are still above the rotating arc body. By rotating the lifting ring plate, the lifting ring plate pushes the lifting pressure block, the rotating arc body and the rotating ring frame to rotate through the protrusions until the four lifting pressure blocks are aligned with the four elastic telescopic blocks again. The lifting ring plate is released, the elastic telescopic block moves upward, and the four elastic telescopic blocks are again located between two adjacent rotating arc bodies, limiting the rotating arc body again.

[0021] The present invention sets a lifting ring plate and rotates the lifting ring plate. The lifting ring plate drives the transmission pinion to rotate through the annular gear row, and the transmission pinion drives the transmission gear and the limit rod body to rotate. The limit rod body drives the trapezoidal block and the limit teeth to slide along the axial direction of the limit rod body. The limit teeth drive the limit gear and the second shaft body to rotate, thereby adjusting the angle of the second ring body. The second ring body drives the top plate on its upper surface to rotate, and the top plate drives the body on its upper surface to rotate around the axis of the second shaft body, so that the bubble of the long level on the body is in the middle position.

[0022] When the staff uses the line-laying device for land engineering surveying to level the machine body, the staff only needs to be in a fixed position relative to the tripod to complete the leveling adjustment of the machine body, thereby improving the staff's adjustment efficiency and avoiding the staff from walking around near the tripod, thereby improving the staff's operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0024] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of the structure of the adjustment unit according to an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the second ring body according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the second shaft according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic structural diagram of a trapezoidal block according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic structural diagram of a rotating strip according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic structural diagram of a first shaft according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic structural diagram of a telescopic slot according to an embodiment of the present invention;

[0032] Figure 9 Schematic diagram of the structure of the support wheel according to an embodiment of the present invention.

[0033] The numbers in the figure represent: 1. Tripod; 11. Adjustment unit; 12. Machine body; 2. Base; 21. Rotating ring frame; 22. First axis; 221. First block; 23. Rotating strip; 24. First ring; 25. Second axis; 251. Second block; 26. Connecting strip; 27. Second ring; 28. Top plate; 29. Rotating unit; 3. Rotating arc; 31. Lifting and lowering block; 32. Elastic expansion block; 4. Horizontal plate ; 41. Triangular block; 42. Movable rod; 43. First screw; 44. U-shaped push-pull member; 441. First slide rail; 45. First gear; 5. Limit rod body; 51. Trapezoidal block; 52. Limit teeth; 53. Limit gear; 54. Transmission gear; 55. Transmission gear; 6. Rotating ring bar; 61. Vertical pole; 62. Lifting ring plate; 63. Annular gear row; 64. Elastic telescopic rod; 641. Telescopic slot; 642. Support wheel. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. 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.

[0035] The present invention will be further described below with reference to the embodiments.

[0036] Example: See Figures 1-9 The present invention provides a technical solution: a line-laying device for land engineering surveying and mapping, comprising:

[0037] A tripod 1, wherein an adjusting portion 11 is fixedly connected to the top of the tripod 1, and an organic body 12 is fixedly connected to the upper surface of the adjusting portion 11;

[0038] The adjusting portion 11 includes a base 2, the lower surface of the base 2 is fixedly connected to the top of the tripod 1, the upper surface of the base 2 is rotatably connected to a rotating ring frame 21, the top of the rotating ring frame 21 is fixedly connected to a first block 221, the rotating ring frame 21 is rotatably connected to a first shaft 22 through the first block 221, a rotating strip 23 is rotatably sleeved on the outer circumferential surface of the first shaft 22, both ends of the rotating strip 23 are commonly fixedly connected to a first ring body 24, the top of the first ring body 24 is fixedly connected to a second block 251, the first ring body 24 is rotatably connected to a second shaft 25 through the second block 251, the outer circumferential surface of the second shaft 25 is fixedly connected to a connecting strip 26, both ends of the connecting strip 26 are commonly fixedly connected to a second ring body 27, the top of the second ring body 27 is fixedly connected to a top plate 28, and the upper surface of the top plate 28 is fixedly connected to the lower surface of the body 12;

[0039] The outer circumferential surface of the rotating ring frame 21 is fixedly connected to a rotating arc 3. There are four rotating arcs 3 and they are distributed in a circular array on the outer circumferential surface of the rotating ring frame 21. A lifting and pressing block 31 is slidably connected between two adjacent rotating arcs 3. An elastic telescopic block 32 is provided below the lifting and pressing block 31.

[0040] The upper surface of the base 2 is rotatably connected to a rotating portion 29, which includes a rotating ring bar 6. The bottom of the rotating ring bar 6 is rotatably connected to the upper surface of the base 2, and the top of the rotating ring bar 6 is fixedly connected to a vertical rod 61. The circumferential outer surface of the vertical rod 61 is slidably sleeved with a lifting ring plate 62. The top of the lifting ring plate 62 is provided with an annular gear row 63.

[0041] The inner wall of the first ring body 24 is fixedly connected to the horizontal plate 4, the bottom of the horizontal plate 4 is fixedly connected to the triangular block 41, the outer surface of the triangular block 41 is rotatably connected to the movable rod 42, the top of the rotating ring frame 21 is rotatably connected to the first screw 43, the circumferential outer surface of the first screw 43 is threadedly sleeved with a U-shaped push-pull member 44, the end of the movable rod 42 away from the triangular block 41 is rotatably connected to the U-shaped push-pull member 44, the end of the first screw 43 away from the first shaft body 22 is fixedly connected to the first gear 45, and the first gear 45 is meshed with the annular gear row 63.

[0042] The inner wall of the rotating ring frame 21 is fixedly connected to the first slide rail 441 , and the bottom end of the U-shaped push-pull member 44 is slidably connected to the first slide rail 441 .

[0043] The top of the first ring body 24 is rotatably connected to the limiting rod body 5, and the circumferential outer surface of the limiting rod body 5 is sleeved with a trapezoidal block 51. The top of the trapezoidal block 51 is provided with a limiting tooth 52. The circumferential outer surface of the second shaft body 25 is fixedly connected to the limiting gear 53, and the limiting gear 53 is meshed with the limiting tooth 52.

[0044] The outer circumferential surface of the limiting rod body 5 is provided with a thread, and the limiting rod body 5 is connected to the trapezoidal block 51 through the threaded surface.

[0045] Both ends of the limiting rod body 5 are fixedly connected to a transmission gear 54 , and the outer circumferential surface of the first shaft body 22 is rotatably connected to a transmission pinion 55 , and the transmission gear 54 is meshed with the transmission pinion 55 .

[0046] A telescopic slot 641 is formed on the upper surface of the base 2 , and an elastic telescopic rod 64 is slidably connected to the base 2 through the telescopic slot 641 . The top end of the elastic telescopic rod 64 contacts the lower surface of the lifting ring plate 62 .

[0047] The top end of the elastic telescopic rod 64 is rotatably connected to a support wheel 642 , and the elastic telescopic rod 64 contacts the lifting ring plate 62 through the support wheel 642 .

[0048] Working principle:

[0049] Adjustment process of the first ring body 24:

[0050] In actual application, the four elastic telescopic blocks 32 can move up and down on the upper surface of the base 2. In the initial state, under the action of elasticity, the four elastic telescopic blocks 32 are located between two adjacent rotating arcs 3, limiting the rotating arcs 3 (limiting the rotation of the rotating ring frame 21 on the upper surface of the base 2). Under the elastic action of the elastic telescopic rods 64 themselves, the four elastic telescopic rods 64 push the lifting ring plate 62 upward along the four vertical rods 61 through the support wheels 642 at their tops, so that the lifting ring plate 62 contacts the bottom side of the first gear 45 through the annular gear row 63 on its upper surface;

[0051] By toggling the lifting ring plate 62, under the coordinated action of the vertical rod 61 and the support wheel 642, the lifting ring plate 62 rotates around its own axis, and the lifting ring plate 62 drives the annular gear row 63 on its upper surface to rotate synchronously. Under the meshing action of the annular gear row 63 and the first gear 45, the rotating annular gear row 63 drives the first gear 45 to rotate, and the first gear 45 drives the first screw 43 to rotate around its own axis. Under the limiting action of the first slide rail 441, the rotating first screw 43 drives the U-shaped push-pull member 44 on its circumferential outer surface to slide along the first slide rail 441, and the U-shaped push-pull member 44 drives the bottom end of the movable rod 42 to slide along the first slide rail 441, so that the top end of the movable rod 42 drives the two triangular blocks 41 to rotate around the axis of the first shaft body 22, and the two triangular blocks 41 drive the first ring body 24 to rotate around the axis of the first shaft body 22 through the horizontal plate 4 on its upper surface, thereby adjusting the angle of the first ring body 24, so that the bubble of the long level gauge on the machine body 12 is in the middle position.

[0052] Adjustment process of rotating ring frame 21:

[0053] In actual application, after the angle of the first ring body 24 is adjusted, the lifting ring plate 62 is pressed down, and the lifting ring plate 62 overcomes the elastic force of the elastic telescopic rod 64 and moves downward, so that the lifting ring plate 62 is separated from the first gear 45, and the lifting ring plate 62 continues to move downward along the vertical rod 61. The lifting ring plate 62 pushes the four lifting pressure blocks 31 to move downward along the rotating arc body 3, and the four lifting pressure blocks 31 push the four elastic telescopic blocks 32 to move downward until the four elastic telescopic blocks 32 are retracted downward into the interior of the base 2, releasing the limit of the rotating arc body 3 by the elastic telescopic blocks 32 (the rotating ring frame 21 can rotate on the upper surface of the base 2). At this time, the top ends of the four lifting pressure blocks 31 are still above the rotating arc body 3. By rotating the lifting ring plate 62, the lifting ring plate 62 rotates around its own axis, and the lifting ring plate 62 drives the lifting pressure blocks 31 to move downward. The four protrusions at the bottom rotate, and the four rotating protrusions push the top ends of the four lifting and pressing blocks 31 to rotate around the axis of the rotating ring frame 21. The four lifting and pressing blocks 31 drive the rotating ring frame 21 to rotate around its own axis on the upper surface of the base 2 through the rotating arc body 3 until the four lifting and pressing blocks 31 are aligned with the four elastic telescopic blocks 32 again, and the lifting ring plate 62 is released. Under the pushing action of the elastic telescopic rod 64, the four elastic telescopic rods 64 push the lifting ring plate 62 upward through the four support wheels 642. Under the elastic action of the elastic telescopic block 32, the four elastic telescopic blocks 32 push the lifting and pressing blocks 31 upward to move vertically upward along the rotating arc body 3. The four elastic telescopic blocks 32 are again located between the two adjacent rotating arc bodies 3, and the rotating arc body 3 is limited again (limiting the rotating ring frame 21 from rotating on the upper surface of the base 2).

[0054] Adjustment process of the second ring body 27:

[0055] In actual application, under the pushing action of the elastic telescopic rods 64, the four elastic telescopic rods 64 push the lifting ring plate 62 to move upward along the vertical rod 61 through the four support wheels 642. The lifting ring plate 62 drives the annular gear row 63 on its upper surface to move upward, so that the annular gear row 63 contacts the bottom side of the transmission pinion 55.

[0056] By toggling the lifting ring plate 62, under the coordinated action of the vertical rod 61 and the support wheel 642, the lifting ring plate 62 rotates around its own axis, and the lifting ring plate 62 drives the annular gear row 63 on its upper surface to rotate synchronously. Under the meshing action of the annular gear row 63 and the transmission pinion 55, the rotating annular gear row 63 drives the transmission pinion 55 to rotate. Under the meshing action of the transmission pinion 55 and the transmission large gear 54, the transmission pinion 55 drives the transmission large gear 54 to rotate, and the transmission large gear 54 drives the limiting rod body 5 to rotate around its own axis. Under the limiting action of the rotating strip plate 23, the rotating limiting rod body 5 drives the trapezoidal block 51 on its circumferential outer surface to slide along the upper surface of the rotating strip plate 23, and the trapezoidal block 51 drives The limiting teeth 52 on its upper surface slide along the axial direction of the limiting rod 5. Under the meshing action of the limiting teeth 52 and the limiting gear 53, the limiting teeth 52 drive the limiting gear 53 to rotate around the axis of the second shaft 25. The limiting gear 53 drives the second shaft 25 to rotate around its own axis. The second shaft 25 drives the connecting strips 26 on its circumferential outer surface to rotate. The connecting strips 26 drive the second ring bodies 27 at both ends to rotate around the axis of the second shaft 25, thereby adjusting the angle of the second ring body 27. The second ring body 27 drives the top plate 28 on its upper surface to rotate. The top plate 28 drives the body 12 on its upper surface to rotate around the axis of the second shaft 25, so that the long level bubble on the body 12 is in the middle position.

[0057] When the staff uses the line-laying device for land engineering surveying to level the body 12, the staff only needs to be in a fixed position relative to the tripod 1 to complete the leveling adjustment of the body 12, thereby improving the staff's adjustment efficiency and avoiding the staff from walking around near the tripod 1, thereby improving the staff's operating efficiency.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A line-laying device for land engineering surveying and mapping, characterized in that: include: A tripod (1), wherein the top of the tripod (1) is fixedly connected to an adjusting portion (11), and the upper surface of the adjusting portion (11) is fixedly connected to an organism (12); The adjusting portion (11) comprises a base (2), the lower surface of the base (2) is fixedly connected to the top of the tripod (1), the upper surface of the base (2) is rotatably connected to a rotating ring frame (21), the top of the rotating ring frame (21) is fixedly connected to a first block (221), the rotating ring frame (21) is rotatably connected to a first shaft (22) via the first block (221), a rotating strip (23) is rotatably sleeved on the outer circumference of the first shaft (22), and both ends of the rotating strip (23) are fixedly connected to the first shaft (22). A ring body (24), wherein the top of the first ring body (24) is fixedly connected to a second block (251), the first ring body (24) is rotatably connected to a second shaft body (25) through the second block (251), the outer circumferential surface of the second shaft body (25) is fixedly connected to a connecting strip (26), both ends of the connecting strip (26) are fixedly connected to a second ring body (27), the top of the second ring body (27) is fixedly connected to a top plate (28), and the upper surface of the top plate (28) is fixedly connected to the lower surface of the body (12); The outer circumferential surface of the rotating ring frame (21) is fixedly connected to a rotating arc body (3), and the rotating arc bodies (3) are provided with four and are distributed in a circular array on the outer circumferential surface of the rotating ring frame (21). A lifting and pressing block (31) is slidably connected between two adjacent rotating arc bodies (3), and an elastic telescopic block (32) is provided below the lifting and pressing block (31); The upper surface of the base (2) is rotatably connected to a rotating portion (29), the rotating portion (29) comprises a rotating ring bar (6), the bottom of the rotating ring bar (6) is rotatably connected to the upper surface of the base (2), the top of the rotating ring bar (6) is fixedly connected to a vertical rod (61), the circumferential outer surface of the vertical rod (61) is slidably sleeved with a lifting ring plate (62), and the top of the lifting ring plate (62) is provided with an annular gear row (63); The inner wall of the first ring body (24) is fixedly connected to a transverse plate (4), the bottom of the transverse plate (4) is fixedly connected to a triangular block (41), the outer surface of the triangular block (41) is rotatably connected to a movable rod (42), the top of the rotating ring frame (21) is rotatably connected to a first screw rod (43), the circumferential outer surface of the first screw rod (43) is threadedly sleeved with a U-shaped push-pull member (44), the end of the movable rod (42) away from the triangular block (41) is rotatably connected to the U-shaped push-pull member (44), the end of the first screw rod (43) away from the first shaft body (22) is fixedly connected to a first gear (45), and the first gear (45) is meshed with the annular gear row (63).

2. A line-setting device for land engineering surveying and mapping according to claim 1, characterized in that: The inner wall of the rotating ring frame (21) is fixedly connected to a first slide rail (441), and the bottom end of the U-shaped push-pull member (44) is slidably connected to the first slide rail (441).

3. The line-setting device for land engineering surveying and mapping according to claim 2, characterized in that: The top of the first ring body (24) is rotatably connected to a limiting rod body (5), a trapezoidal block (51) is sleeved on the circumferential outer surface of the limiting rod body (5), and a limiting tooth (52) is provided on the top of the trapezoidal block (51). The circumferential outer surface of the second shaft body (25) is fixedly connected to a limiting gear (53), and the limiting gear (53) is meshed with the limiting tooth (52).

4. The line-setting device for land engineering surveying and mapping according to claim 3, characterized in that: The circumferential outer surface of the limiting rod body (5) is provided with a thread, and the limiting rod body (5) is connected to the trapezoidal block (51) via its threaded surface.

5. The line-setting device for land engineering surveying and mapping according to claim 4, characterized in that: Both ends of the limiting rod body (5) are fixedly connected to a transmission gear (54), and the outer circumferential surface of the first shaft body (22) is rotatably connected to a transmission pinion (55), and the transmission gear (54) is meshedly connected to the transmission pinion (55).

6. The line-setting device for land engineering surveying and mapping according to claim 5, characterized in that: A telescopic groove (641) is provided on the upper surface of the base (2), and the base (2) is slidably connected to an elastic telescopic rod (64) via the telescopic groove (641), and the top end of the elastic telescopic rod (64) contacts the lower surface of the lifting ring plate (62).

7. The line-setting device for land engineering surveying and mapping according to claim 6, characterized in that: The top end of the elastic telescopic rod (64) is rotatably connected to a support wheel (642), and the elastic telescopic rod (64) contacts the lifting ring plate (62) via the support wheel (642).

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