Engineering surveying level gauge supporting device

Abstract

The invention relates to the technical field of engineering equipment supports, in particular to an engineering surveying level gauge supporting device which comprises a carrying circular truncated cone and a plurality of supporting rods rotationally arranged at the lower end of the carrying circular truncated cone, the bottoms of the supporting rods are all arranged in a fillet mode, and positioning mechanisms are arranged at the bottoms of the supporting rods. After the tripod is unfolded, the tripod can be conveniently used on the softer muddy ground, the contact area between the tripod and the muddy ground and the road holding force can be increased, and after the level gauge is erected on the carrying circular table of the tripod, the level gauge cannot settle or deviate on the muddy ground, so that the normal proceeding of the measurement work is ensured. The tripod is convenient to use in a multi-rock zone, can be fixed by virtue of rock seams of rocks, is suitable for rock seams with different sizes and different angles, can improve the stability, and is not easy to blow down or blow down by wind after the level gauge is erected on the carrying circular table of the tripod, so that convenience is brought to measurement work.

Description

Technical Field

[0001] The invention relates to the technical field of engineering equipment brackets, in particular to a supporting device for an engineering measurement level. Background Art

[0002] The engineering surveying level is an instrument that determines the height difference between ground points by establishing a horizontal line of sight. The level usually needs to be mounted on the top round table of a tripod for use, because the core requirement of the level is to accurately measure the height difference. Only when the instrument is in a stable state can the horizontal line of sight established be accurate. The three support rods of the tripod form a stable triangular structure, which can effectively disperse the weight of the level and the equipment it carries, reduce shaking and displacement, and at the same time, each support rod of the tripod has the function of adjusting the length, so as to meet the placement requirements of the level at different heights and provide stable horizontal support to adapt to uneven terrain.

[0003] However, the bottom of each support rod of the existing level tripod is usually pointed, and the contact area with the ground is small. When the tripod is placed on a relatively soft mud to meet the measurement needs of the level in a special area, the level stand will be installed on the top round table of the tripod. Due to the influence of the gravity of the level, the tripod will sink or tilt on the soft mud, affecting the measurement work. At the same time, when the tripod is placed in a rocky area to meet the measurement needs of the level in other special areas, since there are many rocks of different sizes and shapes in the rocky area, it is difficult for the tripod to have a stable foothold and it is easy to be blown or even blown down by the wind, which brings difficulties to the measurement work. Summary of the invention

[0004] The purpose of the present invention is to provide a supporting device for an engineering surveying level instrument to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a supporting device for an engineering surveying level instrument, comprising a loading truncated table and a plurality of supporting rods rotatably arranged at the lower end of the loading truncated table, the bottoms of the plurality of supporting rods are all rounded, and the bottoms of the plurality of supporting rods are all provided with positioning mechanisms; The positioning mechanism comprises a square shell, the square shell is attached to the bottom of the support rod, the square shell is provided with an auxiliary fixing component, a connecting component is provided between the square shell and the support rod, a supporting block is fixedly connected to the middle part of the inner wall of the square shell, a bidirectional screw rod is rotatably installed through the middle part of the side wall of the support block, one end of the bidirectional screw rod is rotatably connected to a fixing block, a rotating component is provided between the other end of the bidirectional screw rod and the square shell, the fixing block is fixedly connected to the inner wall of the square shell, a slider is symmetrically threaded on the outer wall of the bidirectional screw rod, the supporting block is located between the two sliders, the two sliders are both attached to the inner wall of the square shell, the lower ends of the two sliders are both provided with plug plates through an adjusting mechanism, and the two plug plates are slidably arranged in the lower end inner wall of the square shell; The adjustment mechanism includes a square groove, which is opened on the wall surface of the supporting block corresponding to the slider. The top of the square groove is rotatably connected with a connecting rod, the lower end of the connecting rod movably passes through the lower end of the slider, the lower end of the connecting rod is fixedly connected to the middle part of the upper end of the plug plate, and a rotating mechanism is provided between the connecting rod, the slider and the square shell.

[0006] Preferably, the auxiliary reinforcement component includes four auxiliary plates, and the four auxiliary plates are fixedly connected to the two side walls of the square shell in pairs, and the lower ends of the four auxiliary plates are fixedly connected to a row of pins arranged in a linear array.

[0007] Preferably, the connecting assembly includes a screw hole and two connecting plates, the two connecting plates are symmetrically fixedly connected to the upper end of the square shell, the support rod is fitted between the two connecting plates, one of the connecting plates has a knob screw passing through its inner wall, the screw hole is opened on the outer wall of the support rod corresponding to the knob screw, and the knob screw and the screw hole are threadedly matched.

[0008] Preferably, the rotating assembly includes a connecting cylinder and a bevel gear 2, the connecting cylinder is fixedly connected to the upper end of the square shell away from the support rod, the inner wall of the upper end of the connecting cylinder passes through a rotating shaft, the upper and lower ends of the rotating shaft are respectively fixedly connected to a rotating block and a bevel gear 1, the inner top end of the connecting cylinder is fixedly connected to a rubber sleeve, the inner wall of the rubber sleeve is tightly fitted with the outer wall of the rotating shaft, the bevel gear 2 is fixedly connected to one end of the bidirectional screw away from the fixed block, and the bevel gear 2 and the bevel gear 1 are meshed with each other.

[0009] Preferably, the rotating mechanism includes a worm gear, a connecting column and a slot, the worm gear is fixedly sleeved on the outer wall of the connecting rod, one end of the connecting column is rotatably connected to the square slot, the other end of the connecting column moves through the slider and the square shell in turn, the slot is provided at a side wall of the square shell corresponding to the connecting column, the slot and the connecting column are slidably matched, the other end of the connecting column is fixedly connected to a rotating block, a worm is fixedly inserted into the outer wall of the connecting column corresponding to the worm wheel, the worm and the worm wheel are meshed with each other, and a limiting mechanism is provided between the connecting column, the square slot and the rotating block.

[0010] Preferably, the limiting mechanism includes a columnar groove, a splicing rod and a support plate, the columnar groove is formed on the inner wall of the connecting column, the splicing rod is slidably inserted into the rotating block and the inner wall of the connecting column in sequence, one end of the splicing rod extends into the columnar groove and is fixedly connected to the splicing plate, the other end of the splicing rod is fixedly connected to a pressing block, the splicing plate is located in the columnar groove, a plurality of springs are fixedly connected between the wall surface of the splicing plate away from the splicing rod and the columnar groove, the support plate is fixedly connected to the bottom of the square groove, the upper end of the support plate is fixedly connected to a circular ring, the circular ring is slidably sleeved on the outer wall of the connecting column, and a fixing mechanism is provided between the circular ring and the splicing plate.

[0011] Preferably, the fixing mechanism includes a pin and a plurality of limiting holes, the pin being fixedly connected to the outer wall of the splicing plate at the corresponding circular ring, the end of the pin away from the splicing plate being movably inserted into the connecting column, a plurality of limiting holes being arranged on the inner wall of the circular ring in a central annular array around the circular ring, and the end of the pin away from the splicing plate being slidably fitted with one of the limiting holes.

[0012] Preferably, the lower end of the square shell is symmetrically provided with sliding grooves, and the two sliding grooves are respectively slidably matched with the two plug plates.

[0013] Preferably, baffles are fixedly connected to the lower edges of the wall surfaces of the two sliding blocks that are away from each other, and the two baffles are in contact with the inner bottom end of the square shell.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the cooperation of the square shell, auxiliary reinforcement component, connecting component, supporting block, bidirectional screw rod, fixing block, rotating component, sliding block, adjusting mechanism, rotating mechanism, limiting mechanism, fixing mechanism and plug plate, the tripod can be used on relatively soft mud after being unfolded. The contact area and gripping force between the tripod and the mud will be improved. When the level is mounted on the round stage of the tripod, it will not sink or shift in position on the mud, ensuring the normal progress of the measurement work.

[0015] 2. This tripod is easy to use in rocky areas and can be fixed with the help of rock cracks. It is suitable for rock cracks of different sizes and angles. The stability of the tripod will be improved. When the level is mounted on the round platform of the tripod, it is not easily blown or knocked over by the wind, which brings convenience to the measurement work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A magnified view of the structure at center; Figure 3 It is a schematic diagram of the structure of the rotating block and the square shell of the present invention; Figure 4 It is a partial cross-sectional view of the square shell and the connecting tube of the present invention; Figure 5 A partial cross-sectional view of a slider of the present invention; Figure 6 It is a partial cross-sectional view of the connecting column, the rotating block and the circular ring of the present invention; Figure 7 For the present invention Figure 6 A magnified view of the structure at B in the middle; Figure 8 A bottom view of the square shell of the present invention; Fig. 9 It is a partial cross-sectional view of the support plate and the circular ring of the present invention.

[0017] In the accompanying drawings, the list of parts represented by each reference numeral is as follows: 1. Loading table; 2. Support rod; 3. Square shell; 4. Auxiliary plate; 5. Connecting plate; 6. Pin; 7. Insert plate; 8. Connecting tube; 9. Rotating block; 10. Knob screw; 11. Screw hole; 12. Slot; 13. Rotating block; 14. Fixed block; 15. Bidirectional lead screw; 16. Slider; 17. Support block; 18. Rotating shaft; 19. Rubber sleeve; 20. Bevel gear one; 21. Bevel gear two; 22. Baffle; 23. Connecting column; 24. Ring; 25. Press block; 26. Support plate; 27. Worm gear; 28. Connecting rod; 29. ​​Worm; 30. Columnar groove; 31. Splicing plate; 32. Splicing rod; 33. Spring; 34. Pin; 35. Slide; 36. Limit hole; 37. Square groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0019] The present invention provides a technical solution: Figure 1 - Fig. 9 The engineering surveying level support device shown in the figure comprises a loading truncated table 1 and a plurality of support rods 2 rotatably arranged at the lower end of the loading truncated table 1, the bottoms of the plurality of support rods 2 are all rounded, and the bottoms of the plurality of support rods 2 are all provided with positioning mechanisms; The positioning mechanism includes a square shell 3, which is fitted on the bottom of the support rod 2. The square shell 3 is provided with an auxiliary reinforcement component, and a connecting component is provided between the square shell 3 and the support rod 2. A support block 17 is fixedly connected to the middle of the inner wall of the square shell 3, and a bidirectional screw rod 15 is rotatably installed through the middle of the side wall of the support block 17. One end of the bidirectional screw rod 15 is rotatably connected to a fixed block 14, and a rotating component is provided between the other end of the bidirectional screw rod 15 and the square shell 3. The fixed block 14 is fixedly connected to the inner wall of the square shell 3, and a slider 16 is symmetrically threaded on the outer wall of the bidirectional screw rod 15. The support block 17 is located between the two sliders 16, and the two sliders 16 are both fitted on the inner wall of the square shell 3. The lower ends of the two sliders 16 are both installed with plug plates 7 through an adjusting mechanism, and the two plug plates 7 are slidably set in the lower end inner wall of the square shell 3; The adjusting mechanism includes a square groove 37, which is opened on the wall surface of the slider 16 corresponding to the support block 17. The top of the square groove 37 is rotatably connected with a connecting rod 28, and the lower end of the connecting rod 28 movably passes through the lower end of the slider 16. The lower end of the connecting rod 28 is fixedly connected to the middle part of the upper end of the plug plate 7, and a rotating mechanism is provided between the connecting rod 28, the slider 16 and the square shell 3.

[0020] The auxiliary reinforcement assembly includes four auxiliary plates 4, which are fixedly connected to the two side walls of the square shell 3 in pairs, and the lower ends of the four auxiliary plates 4 are fixedly connected to a row of pins 6 arranged in a linear array.

[0021] The connecting assembly includes a screw hole 11 and two connecting plates 5. The two connecting plates 5 are symmetrically fixedly connected to the upper end of the square shell 3. The support rod 2 is fitted between the two connecting plates 5. The inner wall of one of the connecting plates 5 is penetrated by a knob screw 10 that is tightened. The screw hole 11 is opened on the outer wall of the support rod 2 corresponding to the knob screw 10, and the knob screw 10 and the screw hole 11 are threadedly matched.

[0022] The rotating assembly includes a connecting tube 8 and a bevel gear 21. The connecting tube 8 is fixedly connected to the upper end of the square shell 3 away from the support rod 2. The inner wall of the upper end of the connecting tube 8 passes through a rotating shaft 18, and the upper and lower ends of the rotating shaft 18 are respectively fixedly connected to a rotating block 9 and a bevel gear 20. The inner top of the connecting tube 8 is fixedly connected to a rubber sleeve 19, and the inner wall of the rubber sleeve 19 is tightly fitted with the outer wall of the rotating shaft 18. The bevel gear 21 is fixedly connected to one end of the bidirectional screw 15 away from the fixed block 14, and the bevel gear 21 and the bevel gear 20 are meshed with each other.

[0023] The rotating mechanism includes a worm gear 27, a connecting column 23 and a slot 12. The worm gear 27 is fixedly sleeved on the outer wall of the connecting rod 28. One end of the connecting column 23 is rotatably connected to the square slot 37. The other end of the connecting column 23 is movable and passes through the slider 16 and the square shell 3 in sequence. The slot 12 is provided on one side wall of the square shell 3 corresponding to the connecting column 23. The slot 12 and the connecting column 23 are slidably matched. The other end of the connecting column 23 is fixedly connected to the rotating block 13. A worm 29 is fixedly inserted into the outer wall of the connecting column 23 corresponding to the worm gear 27. The worm gear 29 and the worm gear 27 are meshed with each other. A limiting mechanism is provided between the connecting column 23, the square slot 37 and the rotating block 13.

[0024] The limiting mechanism includes a columnar groove 30, a splicing rod 32 and a support plate 26. The columnar groove 30 is opened on the inner wall of the connecting column 23. The splicing rod 32 is slidably inserted into the rotating block 13 and the inner wall of the connecting column 23 in sequence. One end of the splicing rod 32 extends into the columnar groove 30 and is fixedly connected with a splicing plate 31. The other end of the splicing rod 32 is fixedly connected with a pressing block 25. The splicing plate 31 is located in the columnar groove 30. A plurality of springs 33 are fixedly connected between the wall surface of the splicing plate 31 away from the splicing rod 32 and the columnar groove 30. The support plate 26 is fixedly connected to the bottom of the square groove 37. The upper end of the support plate 26 is fixedly connected with a ring 24 (such as Fig. 9 As shown in the figure, the ring 24 is slidably mounted on the outer wall of the connecting column 23, and a fixing mechanism is provided between the ring 24 and the splicing plate 31.

[0025] The fixing mechanism includes a pin 34 and a plurality of limiting holes 36. The pin 34 is fixedly connected to the outer wall of the splicing plate 31 at the corresponding circular ring 24. The end of the pin 34 away from the splicing plate 31 is movable through the connecting column 23. A plurality of limiting holes 36 are arranged on the inner wall of the circular ring 24 in a central annular array around the circular ring 24. The end of the pin 34 away from the splicing plate 31 is slidably fitted with one of the limiting holes 36.

[0026] The lower end of the square shell 3 is symmetrically provided with sliding grooves 35 , and the two sliding grooves 35 are respectively slidably matched with the two plug boards 7 .

[0027] Baffles 22 are fixedly connected to the lower edges of the wall surfaces of the two sliding blocks 16 that are away from each other, and the two baffles 22 are both in contact with the inner bottom end of the square shell 3 .

[0028] Working principle: When using the device on a relatively soft muddy ground, multiple support rods 2 can be rotated and unfolded to a suitable angle under the loading platform 1, and the two plug plates 7 under each support rod 2 are inserted into the muddy ground. At this time, the square shell 3 at the bottom of each support rod 2 will contact the muddy ground surface, and the four auxiliary plates 4 outside the square shell 3 will also contact the muddy ground surface, and the pins 6 under the four auxiliary plates 4 will also be inserted into the muddy ground. Then, each square shell 3 will be fixed to the muddy ground surface due to the action of the plug plates 7 and the pins 6. At this time, since each support rod 2 can be adjusted in length (this is a known prior art and will not be described in detail), and each support rod 2 can be rotated and adjusted on the corresponding square shell 3, then the object-carrying circular table 1 connected to the top of the multiple support rods 2 can be adjusted to be in a stable horizontal state, and then the level instrument can be mounted on the object-carrying circular table 1. At this time, under the action of the square shell 3 and the auxiliary plate 4, the contact area between each support rod 2 and the mud can be increased, so that it is not easy to sink. Secondly, the plug plate 7 and the plug nail 6 can form a certain bite and friction effect with the soil, which can improve the grip between each support rod 2 and the mud, so that it is not easy to shift the position due to the influence of wind or other vibration factors, and thus the normal measurement work can be guaranteed on the relatively soft mud.

[0029] When used in rocky areas, first rotate the square shell 3 at the bottom of a support rod 2, and the square shell 3 will drive the two plug plates 7 and the two connecting plates 5 to rotate together until the knob screw 10 on one of the connecting plates 5 corresponds to the screw hole 11 on the support rod 2. At this time, rotate the knob screw 10 to screw it into the screw hole 11 to lock the corresponding square shell 3, support rod 2, two plug plates 7 and two connecting plates 5 together. Similarly, other corresponding square shells 3, support rods 2, two plug plates 7 and two connecting plates 5 can be locked together according to the same operation method. Then you can look for a large rock with a crack (the cracks on the rock are caused by physical or chemical reasons, which will not be described in detail). After finding the crack, insert the two plug plates 7 under a support rod 2 into the crack. If the size of the crack is larger than the size of the two plug plates 7, you can rotate the corresponding rotating block 9, and the rotating block 9 will drive the rotating shaft 18 to rotate. The rotating shaft 18 can drive the bevel gear 1 20 to rotate, and the bevel gear 1 20 can drive the bevel gear 21 to rotate. The bevel gear 21 can drive the bidirectional screw rod 15 to rotate on the support block 17 and the fixed block 14. The screw rod 15 can drive the two sliders 16 to slide away from each other in the square shell 3, and each slider 16 can drive the plug plate 7 connected to each other to slide in the corresponding slide groove 35, so that the two plug plates 7 will also move away from each other until the two plug plates 7 are pressed against the rock crack, and then the support rod 2 will be fixed with the help of the rock crack, and the two plug plates 7 under the other support rods 2 can be placed on other suitable rock surfaces, and the horizontal stability of the object-carrying round table 1 can be achieved by adjusting the length of each support rod 2, and finally the leveling instrument is mounted on the object-carrying round table 1. Since one of the support rods 2 is fixed with the help of the rock crack, the stability of the entire device will be improved, so that it is not easy to be blown or blown down by the wind, which brings convenience to the measurement work. It should be noted that under the action of the friction between the rubber sleeve 19 and the rotating shaft 18, the rotating block 9, the rotating shaft 18, the bevel gear 1 20, the bevel gear 2 21 and the bidirectional screw rod 15 will maintain a certain fixed state after rotation, and will not easily rotate or slightly deflect.

[0030] It is worth mentioning that when a rotating block 13 is held and a pressing block 25 outside the rotating block 13 is pressed to fit with the rotating block 13, the pressing block 25 will drive the splicing rod 32 to slide in the inner wall of the rotating block 13 in the direction of the connecting column 23, and the splicing rod 32 will drive the splicing plate 31 to move together, and the splicing plate 31 will also squeeze the multiple springs 33 connected to the columnar groove 30, and the splicing plate 31 will also drive the latch 34 to leave a limiting hole 36 in the ring 24. Because the mutual cooperation restriction between the latch 34 and the limiting hole 36 is lost, the rotating block 13 can be rotated. The rotating block 13 will drive the connecting column 23 to rotate on the square groove 37 on the corresponding slider 16 and rotate in the slider 16, and will also rotate on a corresponding slot 12, and will also rotate in the ring 24, the connecting column 23 will drive the worm 29 to rotate, the worm 29 will drive the worm wheel 27 to rotate, and the worm wheel 27 will drive When the connecting rod 28 rotates, the connecting rod 28 will drive a corresponding connected plug plate 7 to rotate. Since a plurality of limiting holes 36 are provided in the ring 24, when the pressing block 25 is released, under the action of the spring 33, the pressing block 25, the splicing rod 32, the splicing plate 31 and the latch 34 will all be reset. Then, the rotating block 13 is rotated to drive the latch 34 to rotate until it can be inserted into another limiting hole 36 in the ring 24, so that the connecting column 23 will be locked. Then, the rotating block 13 will be fixed after rotation. Then, the angle of the plug plate 7 can be kept fixed after adjustment, and the angle adjustment size of the plug plate 7 depends on whether the latch 34 is inserted into different limiting holes 36 in the ring 24. Similarly, the angle of the other plug plate 7 can be fixedly adjusted according to the same operation method, so that when facing rock cracks at different angles, the two plug plates 7 can adapt to the insertion and tightening of rock cracks at different angles through angle adjustment, and have good applicability.

[0031] It should be noted that the two sliders 16 will also drive the baffles 22 connected to them to move together when they move. When the two sliders 16 are in a state of being attached to the support block 17 (when the two sliders 16 are separated from the support block 17, they are used in rocky areas), they can be combined with Figure 4 and Figure 8 From the perspective of the present invention, the two baffles 22 can seal the two chutes 35 , so that when the square shell 3 contacts the mud, mud can be prevented from entering the square shell 3 along the two chutes 35 .

[0032] It should also be noted that when the two sliders 16 move, they will also drive the connecting columns 23, connecting rods 28, worm gears 27, worms 29, support plates 26, rings 24, rotating blocks 13 and plug plates 7 to move together, and the connecting columns 23 will also slide on the corresponding slots 12.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A support device for an engineering surveying level instrument, comprising a loading platform (1) and a plurality of support rods (2) rotatably arranged at the lower end of the loading platform (1), characterized in that: The bottoms of the plurality of support rods (2) are all rounded, and the bottoms of the plurality of support rods (2) are all provided with positioning mechanisms; The positioning mechanism comprises a square shell (3), the square shell (3) being fitted on the bottom of the support rod (2), an auxiliary fixing component being provided on the square shell (3), a connecting component being provided between the square shell (3) and the support rod (2), a supporting block (17) being fixedly connected to the middle of the inner wall of the square shell (3), a bidirectional screw rod (15) being rotatably installed penetrating the middle of the side wall of the support block (17), one end of the bidirectional screw rod (15) being rotatably connected to a fixed block (14), and the other end of the bidirectional screw rod (15) being fixedly connected to the fixed block (14). A rotating assembly is provided between the square shell (3), the fixed block (14) is fixedly connected to the inner wall of the square shell (3), a slider (16) is symmetrically threadedly sleeved on the outer wall of the bidirectional screw rod (15), the support block (17) is located between the two sliders (16), the two sliders (16) are both fitted on the inner wall of the square shell (3), the lower ends of the two sliders (16) are both installed with plug plates (7) through an adjustment mechanism, and the two plug plates (7) are both slidably arranged in the lower inner wall of the square shell (3); The adjustment mechanism comprises a square groove (37), the square groove (37) being formed on a wall surface of the slider (16) corresponding to the support block (17), the top of the square groove (37) being rotatably connected to a connecting rod (28), the lower end of the connecting rod (28) movably passing through the lower end of the slider (16), the lower end of the connecting rod (28) being fixedly connected to the middle part of the upper end of the plug plate (7), and a rotating mechanism being provided between the connecting rod (28), the slider (16) and the square shell (3).

2. The engineering surveying level instrument support device according to claim 1, characterized in that: The auxiliary reinforcement component comprises four auxiliary plates (4), and the four auxiliary plates (4) are fixedly connected to the two side walls of the square shell (3) in pairs, and the lower ends of the four auxiliary plates (4) are fixedly connected to a row of pins (6) arranged in a linear array.

3. The engineering surveying level instrument support device according to claim 1, characterized in that: The connection assembly comprises a screw hole (11) and two connection plates (5), the two connection plates (5) are symmetrically fixedly connected to the upper end of the square shell (3), the support rod (2) is fitted between the two connection plates (5), the inner wall of one of the connection plates (5) is penetrated by a knob screw (10) which is tightened, the screw hole (11) is provided on the outer wall of the support rod (2) corresponding to the knob screw (10), and the knob screw (10) and the screw hole (11) are threadedly matched.

4. The engineering surveying level instrument support device according to claim 1, characterized in that: The rotating assembly comprises a connecting tube (8) and a second bevel gear (21). The connecting tube (8) is fixedly connected to the upper end of the square shell (3) away from the support rod (2). A rotating shaft (18) is rotatably mounted on the inner wall of the upper end of the connecting tube (8). The upper and lower ends of the rotating shaft (18) are respectively fixedly connected to a rotating block (9) and a first bevel gear (20). The top end of the inner part of the connecting tube (8) is fixedly connected to a rubber sleeve (19). The inner wall of the rubber sleeve (19) is tightly fitted with the outer wall of the rotating shaft (18). The second bevel gear (21) is fixedly connected to one end of the bidirectional screw rod (15) away from the fixed block (14). The second bevel gear (21) and the first bevel gear (20) are meshed with each other.

5. The engineering surveying level instrument support device according to claim 1, characterized in that: The rotating mechanism comprises a worm wheel (27), a connecting column (23) and a clamping groove (12); the worm wheel (27) is fixedly sleeved on the outer wall of the connecting rod (28); one end of the connecting column (23) is rotatably connected to the square groove (37); the other end of the connecting column (23) is movably penetrated through the slider (16) and the square shell (3) in sequence; the clamping groove (12) is provided at a side wall of the square shell (3) corresponding to the connecting column (23); the clamping groove (12) and the connecting column (23) are slidably matched; the other end of the connecting column (23) is fixedly connected to a rotating block (13); a worm (29) is fixedly inserted through the outer wall of the connecting column (23) corresponding to the worm wheel (27); the worm (29) and the worm wheel (27) are meshed with each other; and a limiting mechanism is provided between the connecting column (23), the square groove (37) and the rotating block (13).

6. The engineering surveying level instrument support device according to claim 5, characterized in that: The limiting mechanism comprises a columnar groove (30), a splicing rod (32) and a support plate (26); the columnar groove (30) is formed on the inner wall of the connecting column (23); the splicing rod (32) is slidably inserted into the rotating block (13) and the inner wall of the connecting column (23) in sequence; one end of the splicing rod (32) extends into the columnar groove (30) and is fixedly connected to the splicing plate (31); the other end of the splicing rod (32) is fixedly connected to the pressing block (25); and the splicing rod (32) is fixedly connected to the pressing block (25). The plate (31) is located in the columnar groove (30); a plurality of springs (33) are fixedly connected between the wall surface of the splicing plate (31) away from the splicing rod (32) and the columnar groove (30); the support plate (26) is fixedly connected to the bottom of the square groove (37); a circular ring (24) is fixedly connected to the upper end of the support plate (26); the circular ring (24) is slidably sleeved on the outer wall of the connecting column (23); and a fixing mechanism is provided between the circular ring (24) and the splicing plate (31).

7. The engineering surveying level instrument support device according to claim 6, characterized in that: The fixing mechanism comprises a latch (34) and a plurality of limiting holes (36); the latch (34) is fixedly connected to the outer wall of the splicing plate (31) at a position corresponding to the circular ring (24); one end of the latch (34) away from the splicing plate (31) movably penetrates the connecting column (23); a plurality of limiting holes (36) are arranged on the inner wall of the circular ring (24) in a circular array around the center of the circular ring (24); one end of the latch (34) away from the splicing plate (31) is slidably engaged with one of the limiting holes (36).

8. The engineering surveying level instrument support device according to claim 1, characterized in that: The lower end of the square shell (3) is symmetrically provided with sliding grooves (35), and the two sliding grooves (35) are respectively slidably matched with the two plug plates (7).

9. The engineering surveying level instrument support device according to claim 1, characterized in that: A baffle plate (22) is fixedly connected to the lower edges of the wall surfaces of the two sliding blocks (16) that are away from each other, and the two baffle plates (22) are both fitted to the inner bottom end of the square shell (3).

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