Fixed marker post for engineering surveying and mapping

Abstract

The utility model discloses a fixed marker post for engineering surveying and mapping, which relates to the technical field of engineering surveying and mapping instruments and comprises a base, a fixing unit and an adjusting unit are mounted on the base, a marker post is mounted on the adjusting unit, and a detection unit is arranged on the side surface of the lower end of the marker post. The multifunctional marker post has the beneficial effects that a fixing rod is conveniently inserted into or pulled out of the ground through a first screw rod and a cross beam, so that the convenience of mounting and dismounting during use of the marker post is improved, the marker post is fixed by inserting the fixing rod into soil during use of the marker post, and meanwhile, an anti-falling block is driven by a second screw rod, a sliding plate and a transmission rod to enter the soil; the contact area of the lower end of the fixing rod and soil is increased, the stability of the base placed on the ground is improved, and therefore the stability and firmness of the marker post in the using process are improved, the marker post is not prone to inclining when subjected to external force, the marker post can better cooperate with surveying and mapping work, and the accuracy of surveying and mapping results is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering surveying and mapping equipment, in particular to a fixed benchmark for engineering surveying and mapping. Background Art

[0002] The fixed benchmark used in surveying and mapping projects is a reference mark used for measurement and positioning. It usually refers to a measuring tool in the shape of a pole and is mainly used to indicate the measuring point.

[0003] After searching, the Chinese patent publication number CN221037439U discloses a fixed benchmark for engineering surveying and mapping, which mainly swings under the action of the gravity of the counterweight block through a swing rod. The swing rod drives the benchmark to swing through the adjusting ball. The rotating ring located on the left side of the fixed ring drives the fixed rod to move, and the fixed rod drives the supporting frame to rotate. At this time, the gravity block and the counterweight block simultaneously limit the rotating ring and the supporting frame, which has the advantage of being suitable for various slope measurements.

[0004] By comparing with the existing technologies in related fields, it can be seen that the existing fixed benchmarks are provided with a fixing rod at the lower end. When in use, the fixing rod is only driven into the ground through the fixing rod to fix the fixed benchmark. When the fixed benchmark is subjected to external force, it is very easy to be driven to tilt, which affects the use of the fixed benchmark. When the ground where the fixed benchmark is placed is a slope, other tools are needed to adjust the verticality of the benchmark, and the adjustment speed is slow, time-consuming and labor-intensive. Utility Model Content

[0005] The purpose of this utility model is to provide a fixed benchmark for engineering surveying and mapping in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A fixed benchmark for engineering surveying and mapping, comprising a base, a fixing unit for fixing and an adjustment unit for adjusting an angle mounted on the base, a benchmark mounted on the adjustment unit, and a detection unit disposed on the side surface of the lower end of the benchmark;

[0008] The fixing unit on the base includes a crossbeam, a fixing rod, and an anti-slip block. A lifting assembly is installed on both sides of the base. There are two crossbeams and both are installed on the lifting assembly. Fixed rods are installed at both ends of the two crossbeams. The fixed rods are slidably connected to the base. A driving assembly and a placement cavity are provided in the fixed rods. A slide is slidably installed in the placement cavity. The slide is connected to the driving assembly by transmission. The lower surface of the slide is equiangularly movably connected to the transmission rod. The anti-slip block is equiangularly slidably connected to the fixed rod, the anti-slip block is slidably connected to the placement cavity, and the part of the anti-slip block located in the placement cavity is movably connected to the fixed rod;

[0009] The detection unit on the benchmark includes an installation box, which is installed on the lower side of the benchmark. A pointer is rotatably installed in the installation box. The center position of the installation box corresponds to the center position of the benchmark. A center label is set at the center position of the installation box, and the pointer slides to connect the center label.

[0010] Furthermore, the lifting assembly on the base includes two first screws, both of which are threadedly connected to the base, and the lower ends of the first screws are rotatably connected to the crossbeam.

[0011] Furthermore, the driving assembly on the fixed rod includes a second screw rod, which is threadedly connected to the fixed rod. A driving wheel is provided at the upper end of the second screw rod, and the end of the second screw rod located in the placement cavity is rotated to connect the slide plate.

[0012] Furthermore, a storage groove is provided on the lower surface of the base, and the storage groove is slidably connected to the crossbeam.

[0013] Furthermore, the adjustment unit on the base includes a rotating shaft and a mounting seat. The rotating shaft and the mounting seat are both rotatably mounted on the base. A handwheel and a driving gear are installed on the rotating shaft. A gear ring is installed on the lower surface of the mounting seat. Locking components are provided on the mounting seat and the handwheel. A movable block is movably connected to the mounting seat, the movable block is connected to the benchmark, and the gear ring is meshed and connected to the driving gear.

[0014] Furthermore, the locking assembly on the mounting base and the handwheel includes a first locking bolt and a screw hole. The first locking bolt is threadedly installed on both sides of the mounting base. The first locking bolt is frictionally connected to the movable block. The screw hole is arranged at equal angles on the handwheel. The second locking bolt is threadedly connected to the screw hole. The second locking bolt is frictionally connected to the base.

[0015] Furthermore, an auxiliary rod is provided at an equal angle on the lower surface of the mounting seat, and a ball is rotatably installed on the lower end of the auxiliary rod, and the ball is slidably connected to the upper surface of the base.

[0016] The beneficial effects compared with the prior art are as follows:

[0017] 1. The first screw and the crossbeam facilitate the insertion or extraction of the fixing rod into the ground, thereby improving the convenience of installation and disassembly when the benchmark is in use. When the benchmark is in use, the fixing rod is inserted into the soil to fix the benchmark. At the same time, the second screw, the slide plate, and the transmission rod drive the anti-slip block into the soil, increasing the contact area between the lower end of the fixing rod and the soil, and improving the stability of the base placed on the ground, thereby improving the stability and firmness of the benchmark during use, making it less likely for the benchmark to tilt when subjected to external force, so that the benchmark can better cooperate with surveying and mapping work and ensure the accuracy of surveying and mapping results.

[0018] 2. Under the action of its own gravity, the pointer is always perpendicular to the ground. The position between the center label and the pointer can be used to quickly judge the status of the benchmark, which is more intuitive. The direction of the benchmark can be adjusted through the handwheel, rotating shaft, driving gear, and ring gear, which makes it convenient to use the benchmark in different directions. During the rotation process, the status of the benchmark is detected by the detection unit, and the angle between the movable block and the mounting seat is adjusted to make the benchmark and the ground perpendicular, which effectively improves the convenience of adjustment, reduces time waste, and improves the efficiency of benchmark adjustment and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order 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. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of a fixed benchmark for engineering surveying and mapping described in the utility model;

[0021] Figure 2 This is a fixed benchmark for engineering surveying and mapping described in the utility model. Figure 1 A in the middle is an enlarged structural diagram;

[0022] Figure 3 This is a schematic cross-sectional structure diagram of a base and an installation box of a fixed benchmark for engineering surveying and mapping described in the utility model;

[0023] Figure 4 This is a fixed benchmark for engineering surveying and mapping described in the utility model. Figure 3 The enlarged structural diagram at B in the middle;

[0024] Figure 5 This is a schematic structural diagram of the fixed teeth and anti-dropping blocks of a fixed benchmark for engineering surveying and mapping described in the present invention in the stored state;

[0025] Figure 6 This is a schematic structural diagram of the fixed teeth and anti-dropping blocks of a fixed benchmark for engineering surveying and mapping described in the present utility model in an expanded state;

[0026] Figure 7 This is a schematic diagram of the partial structure of the base and the pole of a fixed pole for engineering surveying and mapping described in the utility model;

[0027] Figure 8 This is a fixed benchmark for engineering surveying and mapping described in the utility model. Figure 7 The enlarged structural diagram at C in the middle;

[0028] Figure 9 The utility model is a schematic diagram of the upward structure of a fixed benchmark for engineering surveying and mapping.

[0029] The following are the descriptions of the reference numerals:

[0030] 1. Base; 21. First screw; 22. Crossbeam; 23. Fixed rod; 24. Second screw; 25. Drive wheel; 26. Placement cavity; 27. Slide plate; 28. Transmission rod; 29. Anti-slip block; 31. Handwheel; 32. Rotating shaft; 33. Driving gear; 34. Gear ring; 35. Mounting seat; 36. Movable block; 37. First locking bolt; 38. Screw hole; 39. Second locking bolt; 41. Mounting box; 42. Pointer; 43. Center label; 5. Marking rod; 6. Storage slot; 7. Auxiliary rod; 8. Ball. DETAILED DESCRIPTION

[0031] like Figures 1-9 As shown, a fixed benchmark for engineering surveying and mapping includes a base 1, a fixing unit for fixing and an adjustment unit for adjusting the angle are installed on the base 1, a benchmark 5 is installed on the adjustment unit, and a detection unit is provided on the lower side of the benchmark 5. Figure 1 、 Figure 3 、 Figure 7 、 Figure 9 As shown, the base 1 is fixed to the ground by the fixing unit, so that the benchmark 5 is not easy to shake or tilt, thereby improving the stability and positioning accuracy of the benchmark 5 during use. The inclination angle of the benchmark 5 is adjusted by the adjustment unit so that the benchmark 5 is always perpendicular to the ground, ensuring the accuracy of the surveying and mapping results. The state of the benchmark 5 is detected by the detection unit, which facilitates the judgment of whether the benchmark 5 is perpendicular to the ground.

[0032] The fixing unit on the base 1 includes a crossbeam 22, a fixing rod 23, and an anti-slip block 29. A lifting assembly is installed on both sides of the base 1. There are two crossbeams 22 and both are installed on the lifting assembly. Fixed rods 23 are installed at both ends of the two crossbeams 22. The fixed rod 23 is slidably connected to the base 1. A driving assembly and a placement cavity 26 are provided in the fixed rod 23. A slide 27 is slidably installed in the placement cavity 26. The slide 27 is transmission-connected to the driving assembly. The lower surface of the slide 27 is equiangularly movably connected to the transmission rod 28. The anti-slip block 29 is equiangularly slidably connected to the fixed rod 23. The anti-slip block 29 is slidably connected to the placement cavity 26. The part of the anti-slip block 29 located in the placement cavity 26 is movably connected to the fixed rod 23. Figure 1 、 Figure 3 、 Figure 7 As shown, the lower end of the fixing rod 23 is tapered, so that the fixing rod 23 can be easily inserted into the ground. Figure 4-Figure 6 、 Figure 9As shown, the outer surface of the anti-dropping block 29 is a pointed cone, so that the anti-dropping block 29 is easy to move in the soil. When the pole 5 is placed, as shown in FIG. Figure 1 、 Figure 3 、 Figure 7 As shown, the base 1 is placed on the ground, and the crossbeam 22 is driven to move by the lifting assembly, and the fixing rod 23 is driven to penetrate into the soil by the crossbeam 22. After the lower end of the fixing rod 23 penetrates into the soil, the slide 27 is driven by the driving assembly to move in the placement cavity 26, and the slide 27 pushes the anti-falling block 29 to move through the transmission rod 28, as shown in FIG. Figure 5 、 Figure 6 As shown, the anti-fall-off block 29 enters the soil, increases the contact area between the lower end of the fixing rod 23 and the soil, and improves the stability of the base 1 placed on the ground, thereby improving the stability and firmness of the benchmark 5 during use, making it difficult for the benchmark 5 to tilt when subjected to external force, so that the benchmark 5 can better cooperate with surveying and mapping work, ensuring the accuracy of surveying and mapping results;

[0033] The detection unit on the pole 5 includes a mounting box 41, which is mounted on the lower side of the pole 5. A pointer 42 is rotatably mounted in the mounting box 41. The center position of the mounting box 41 corresponds to the center position of the pole 5. A center label 43 is provided at the center position of the mounting box 41. The pointer 42 is slidably connected to the center label 43. Figure 1 、 Figure 3 、 Figure 7 As shown, the installation box 41 is a transparent box, which is convenient for observing the positions of the pointer 42 and the center label 43. The pointer 42 is protected by the installation box 41 to avoid the influence of wind on the pointer 42, thereby ensuring the accuracy of the position of the pointer 42. Under the action of the gravity of the pointer 42 itself, the pointer 42 is always perpendicular to the ground. During the adjustment of the benchmark 5, when the benchmark 5 is perpendicular to the ground, the pointer 42 and the center label 43 correspond to each other. The position between the center label 43 and the pointer 42 can be used to quickly judge the status of the benchmark 5, which is more intuitive, so that the status of the benchmark 5 can be quickly adjusted as needed, reducing the time for detecting the status of the benchmark 5.

[0034] The lifting assembly on the base 1 includes a first screw 21, and there are two first screws 21. The two first screws 21 are threadedly connected to the base 1. The lower end of the first screw 21 is rotatably connected to the crossbeam 22. The upper end of the first screw 21 is equipped with an operating handle. After the base 1 is placed on the ground, Figure 1 、 Figure 3 、 Figure 7As shown, the first screw rod 21 is rotated by the operating handle on the first screw rod 21 to adjust the connection length between the first screw rod 21 and the base 1. The first screw rod 21 drives the cross beam 22 to move, thereby facilitating the fixing rod 23 to penetrate into the soil, thereby improving the convenience of operation. The first screw rod 21 can also drive the cross beam 22 to move in the opposite direction, thereby facilitating the removal of the fixing rod 23, thereby improving the convenience during installation and disassembly.

[0035] The driving assembly on the fixed rod 23 includes a second screw rod 24, which is threadedly connected to the fixed rod 23. The upper end of the second screw rod 24 is provided with a driving wheel 25. The end of the second screw rod 24 located in the placement cavity 26 is rotated to connect the slide plate 27. Figure 3 、 Figure 4 As shown, the second screw rod 24 is driven to rotate by the driving wheel 25 to adjust the length of the second screw rod 24 in the placement cavity 26 , thereby driving the slide plate 27 to move in the placement cavity 26 through the second screw rod 24 .

[0036] The lower surface of the base 1 is provided with a receiving groove 6, which is slidably connected to the crossbeam 22. Figure 3 、 Figure 9 As shown, when the pole 5 is not in use, the crossbeam 22 is moved to the upper end of the receiving groove 6, so that the lower end of the fixing rod 23 is received in the receiving groove 6, thereby improving the safety during transportation.

[0037] The adjustment unit on the base 1 includes a rotating shaft 32 and a mounting seat 35. The rotating shaft 32 and the mounting seat 35 are both rotatably mounted on the base 1. A handwheel 31 and a driving gear 33 are mounted on the rotating shaft 32. A gear ring 34 is mounted on the lower surface of the mounting seat 35. A locking assembly is provided on the mounting seat 35 and the handwheel 31. A movable block 36 is movably connected to the mounting seat 35. The movable block 36 is connected to the benchmark 5. The gear ring 34 is meshed with the driving gear 33. Figure 1 、 Figure 3 、 Figure 7 、 Figure 8 As shown, after the marker 5 is placed, the hand wheel 31 is turned, and the rotating shaft 32 is driven to rotate by the hand wheel 31, and the rotating shaft 32 drives the driving gear 33 to rotate, and the driving gear 33 drives the gear ring 34 to rotate, and the gear ring 34 drives the mounting seat 35 to rotate, and the mounting seat 35 drives the marker 5 to rotate through the movable block 36, thereby adjusting the direction of the marker 5, making it convenient for the marker 5 to be used in different directions. During the rotation process, the state of the marker 5 is detected by the detection unit, and the angle between the movable block 36 and the mounting seat 35 is adjusted, so that the marker 5 and the ground are in a vertical state, which effectively improves the convenience of adjustment, reduces time waste, and improves the efficiency of adjustment and use of the marker 5. After the adjustment of the hand wheel 31 and the movable block 36 is completed, they are locked by the locking assembly to prevent self-rotation.

[0038] The locking assembly on the mounting base 35 and the hand wheel 31 includes a first locking bolt 37 and a screw hole 38. The first locking bolt 37 is threadedly mounted on both sides of the mounting base 35. The first locking bolt 37 is frictionally connected to the movable block 36. Figure 1 As shown, after the angle adjustment between the movable seat and the mounting seat 35 is completed, the first locking bolt 37 is rotated so that the first locking bolt 37 is pressed against the movable block 36, thereby locking the movable block 36 and the mounting seat 35 by the first locking bolt 37 to prevent displacement between the movable block 36 and the mounting seat 35, and the screw hole 38 is set at an equal angle on the hand wheel 31, and the second locking bolt 39 is connected to the inner thread of the screw hole 38. The second locking bolt 39 is frictionally connected to the base 1, as shown in FIG. Figure 1-Figure 3 As shown, after the operation of the handwheel 31 is completed, the second locking bolt 39 is installed in the screw hole 38 at the appropriate position, and the second locking bolt 39 is tightened on the base 1, thereby locking and fixing the handwheel 31 to prevent the handwheel 31 from rotating.

[0039] The lower surface of the mounting seat 35 is provided with an auxiliary rod 7 at an equal angle, and the lower end of the auxiliary rod 7 is rotatably mounted with a ball 8, which is slidably connected to the upper surface of the base 1. Figure 8 As shown, the auxiliary rod 7 and the ball 8 provide auxiliary support for the mounting seat 35 to improve the stability of the mounting seat 35 during rotation. At the same time, the ball 8 facilitates the auxiliary rod 7 to rotate with the mounting seat 35 to avoid affecting the rotation of the mounting seat 35.

[0040] Working principle: Figure 1 、 Figure 3 、 Figure 7 As shown, the base 1 is placed on the ground, and the first screw 21 is rotated by the operating handle on the first screw 21, and the first screw 21 drives the crossbeam 22 to move, and the crossbeam drives the fixing rod 23 to penetrate the soil;

[0041] After the lower end of the fixing rod 23 is inserted into the soil, Figure 3 、 Figure 4 As shown, the second screw 24 is driven to rotate by the driving wheel 25, and the slide 27 is driven to move in the placement cavity 26 by the second screw 24. The slide 27 pushes the anti-slip block 29 to move through the transmission rod 28, as shown in FIG. Figure 5 、 Figure 6 As shown, the anti-fall-off block 29 enters the soil, increasing the contact area between the lower end of the fixing rod 23 and the soil, and improving the stability of the base 1 placed on the ground;

[0042] After the base 1 is fixed, Figure 1 、 Figure 3 、 Figure 7 、 Figure 8As shown, the hand wheel 31 is rotated, and the rotating shaft 32 is rotated by the hand wheel 31, and the rotating shaft 32 drives the driving gear 33 to rotate, and the driving gear 33 drives the gear ring 34 to rotate, and the gear ring 34 drives the mounting seat 35 to rotate, and the mounting seat 35 drives the benchmark 5 to rotate through the movable block 36, thereby adjusting the direction of the benchmark 5; Figure 1-Figure 3 As shown, after the hand wheel 31 is operated, the second locking bolt 39 is installed into the screw hole 38 at the appropriate position, and the second locking bolt 39 is tightened against the base 1, thereby locking and fixing the hand wheel 31; during the rotation of the mounting base 35, as shown Figure 8 As shown, the auxiliary rod 7 and the ball 8 provide auxiliary support for the mounting seat 35 to improve the stability of the mounting seat 35 during rotation;

[0043] After the orientation of the marker 5 is adjusted, Figure 1 、 Figure 3 、 Figure 7 As shown, the position between the pointer 42 and the center mark 43 is observed by the mounting box 41, and the angle of deviation between the center mark 43 and the pointer 42 is determined as follows: Figure 1 、 Figure 7 As shown, the angle between the movable block 36 and the mounting base 35 is adjusted, and the rod 5 drives the center label 43 to rotate, so that the center label 43 moves to a position overlapping with the pointer 42, as shown in FIG. Figure 1 As shown, the first locking bolt 37 is rotated so that the first locking bolt 37 is tightened on the movable block 36, thereby locking the movable block 36 and the mounting seat 35 by the first locking bolt 37; at this time, the benchmark 5 is perpendicular to the ground, and the placement and fixation of the benchmark 5 are completed. The benchmark 5 can be used for surveying and mapping;

[0044] After the surveying is completed, Figure 3 、 Figure 4 As shown, the driving wheel 25 drives the second screw 24 to rotate in the opposite direction, and the second screw 24 drives the anti-slip block 29 to move in the opposite direction through the slide 27 and the transmission rod 28, so that the anti-slip block 29 enters the placement cavity 26, as shown in FIG. Figure 1 、 Figure 3 、 Figure 7 As shown, the first screw rod 21 is rotated by the operating handle on the first screw rod 21, and the first screw rod 21 drives the lateral reverse movement, thereby driving the fixing rod 23 off the ground, thereby improving the convenience during disassembly.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A fixed pole for engineering surveying and mapping, characterized in that: The invention comprises a base (1), a fixing unit for fixing and an adjusting unit for adjusting an angle are installed on the base (1), a benchmark (5) is installed on the adjusting unit, and a detection unit is provided on the side surface of the lower end of the benchmark (5); The fixing unit on the base (1) includes a crossbeam (22), a fixing rod (23), and an anti-slip block (29). A lifting assembly is installed on both sides of the base (1). There are two crossbeams (22) and both are installed on the lifting assembly. Both ends of the two crossbeams (22) are installed with fixing rods (23). The fixing rods (23) are slidably connected to the base (1). A driving assembly and a placement cavity (26) are provided in the fixing rod (23). A slide plate (27) is slidably installed in the placement cavity (26). The slide plate (27) is transmission-connected to the driving assembly. The lower surface of the slide plate (27) is equiangularly movably connected to the transmission rod (28). The anti-slip block (29) is equiangularly slidably connected to the fixing rod (23). The anti-slip block (29) is slidably connected in the placement cavity (26). The part of the anti-slip block (29) located in the placement cavity (26) is movably connected to the fixing rod (23). The detection unit on the pole (5) includes a mounting box (41), the mounting box (41) is mounted on the lower side of the pole (5), a pointer (42) is rotatably mounted in the mounting box (41), the center position of the mounting box (41) corresponds to the center position of the pole (5), a center label (43) is provided at the center position of the mounting box (41), and the pointer (42) is slidably connected to the center label (43).

2. The fixed pole for engineering surveying and mapping according to claim 1, characterized in that: The lifting assembly on the base (1) comprises a first screw rod (21), wherein there are two first screw rods (21), both of which are threadedly connected to the base (1), and the lower ends of the first screw rods (21) are rotatably connected to the crossbeam (22).

3. The fixed pole for engineering surveying and mapping according to claim 1, characterized in that: The driving assembly on the fixed rod (23) includes a second screw rod (24), the second screw rod (24) is threadedly connected to the fixed rod (23), a driving wheel (25) is provided at the upper end of the second screw rod (24), and the end of the second screw rod (24) located in the placement cavity (26) is rotatably connected to the slide plate (27).

4. The fixed pole for engineering surveying and mapping according to claim 1, characterized in that: A receiving groove (6) is provided on the lower surface of the base (1), and the receiving groove (6) is slidably connected to the crossbeam (22).

5. The fixed pole for engineering surveying and mapping according to claim 1, characterized in that: The adjusting unit on the base (1) comprises a rotating shaft (32) and a mounting seat (35). The rotating shaft (32) and the mounting seat (35) are both rotatably mounted on the base (1). A hand wheel (31) and a driving gear (33) are mounted on the rotating shaft (32). A gear ring (34) is mounted on the lower surface of the mounting seat (35). Locking assemblies are provided on the mounting seat (35) and the hand wheel (31). A movable block (36) is movably connected to the mounting seat (35). The movable block (36) is connected to the benchmark (5), and the gear ring (34) is meshed with the driving gear (33).

6. The fixed pole for engineering surveying and mapping according to claim 5, characterized in that: The locking assembly on the mounting seat (35) and the hand wheel (31) includes a first locking bolt (37) and a screw hole (38). The first locking bolt (37) is threadedly mounted on both sides of the mounting seat (35). The first locking bolt (37) is frictionally connected to the movable block (36). The screw hole (38) is arranged at an equal angle on the hand wheel (31). The screw hole (38) is internally threadedly connected to a second locking bolt (39). The second locking bolt (39) is frictionally connected to the base (1).

7. The fixed pole for engineering surveying and mapping according to claim 5, characterized in that: An auxiliary rod (7) is provided at an equal angle on the lower surface of the mounting seat (35), and a ball (8) is rotatably mounted on the lower end of the auxiliary rod (7), and the ball (8) is slidably connected to the upper surface of the base (1).

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