A support assembly for surveying instruments and its usage method

Abstract

The present invention relates to the technical field of engineering surveying and mapping. Specifically, it discloses a support assembly for surveying instruments and a usage method. It includes a main body of the support assembly. The main body of the support assembly includes a support plate for placing a surveying instrument. A plurality of support foot assemblies are provided at the edge of the support plate and are distributed circumferentially along the support plate. A sliding column perpendicular to the support plate is provided at the center of the support plate. A sliding assembly is provided at the sliding column and can move axially along the sliding column and push the support foot assemblies to separate outward from the support plate. The usage method includes standing the main body of the support assembly on the ground, opening the support foot assemblies, fixing the support foot assemblies, and placing the surveying instrument. It reduces the usage steps and facilitates the staff to quickly open and recycle the main body of the support assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering surveying and mapping, and more specifically, to a support assembly for surveying instruments and a usage method thereof. Background Art

[0002] Currently, most of the supports for levels, surveying instruments or theodolites used on construction sites are triangular supports. The triangular support includes a support plate and telescopic support feet, and bolts for fixing the length of the support feet after stretching are provided at the support feet. When using the triangular support, the staff first needs to untie the straps binding the support feet, then unscrew the bolts at each support foot, then lift the support plate upward to extend the support feet to a suitable length, then tighten the bolts at each support foot, and finally separate the support feet and stand them on the ground. Since the steps of using the triangular support are numerous, it brings inconvenience to surveying personnel. Summary of the Invention

[0003] The present invention provides a support assembly for surveying instruments and a usage method thereof, which can overcome certain or some defects of the prior art.

[0004] To solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A support assembly for surveying instruments includes a main body of the support assembly. The main body of the support assembly includes a support plate for placing a surveying instrument. A plurality of support foot assemblies are provided at the edge of the support plate and are distributed circumferentially along the support plate. A sliding column perpendicular to the support plate is provided at the center of the support plate. A sliding assembly is provided at the sliding column and can move axially along the sliding column and push the support foot assemblies to separate outward from the support plate.

[0006] Through the settings of the main body of the support assembly, the support plate, the support foot assemblies, the sliding column and the sliding assembly in the present invention, the usage steps are reduced, which facilitates the staff to quickly open and recycle the main body of the support assembly.

[0007] Preferably, the support foot assembly includes a first hinge column. A hinge groove matching with the first hinge column is provided on the side wall of the support plate. Installation rods perpendicular to the first hinge column are provided on the side walls at both ends of the first hinge column. A sliding groove is provided on the side wall of the installation rod along the length direction of the installation rod. A collar is provided at the end of the installation rod away from the first hinge column. A sliding plate passing through the collar and having both ends extending into the sliding grooves is provided between the two installation rods.

[0008] Through the settings of the first hinge column, the hinge groove, the installation rods, the sliding grooves, the collar and the sliding plate in the present invention, it is convenient for the staff to adjust the length of the sliding plate extending out.

[0009] Preferably, the sliding assembly includes a collar body sleeved on the sliding column. The collar body includes a first collar and a second collar that fits against the first collar. The side wall of the second collar is provided with a plurality of first mounting grooves distributed circumferentially along the second collar, and both side walls at the two ends of the first mounting groove are provided with first grooves. The side wall of the first collar is provided with a second mounting groove corresponding to the first mounting groove, and both side walls at the two ends of the second mounting groove are provided with second grooves corresponding to the first grooves. The first groove and the second groove together form a hinge blind hole. A second hinge column is provided at the hinge blind hole. Both ends of the second hinge column are provided with limit columns extending into the hinge blind hole. A connecting rod is provided on the side wall of the second hinge column. A hinge seat is provided on the side wall of the sliding plate. One end of the connecting rod away from the second hinge column is hinged to the hinge seat. A limiting mechanism that cooperates with the second hinge column to limit the rotation of the second hinge column is provided at the hinge blind hole.

[0010] Through the settings of the first collar, the second collar, the first mounting groove, the first groove, the second mounting groove, the second groove, the hinge blind hole, the second hinge column, the limit column, the connecting rod, the hinge seat and the limiting mechanism in the present invention, the stability of the support foot assembly is preferably improved.

[0011] Preferably, the limiting mechanism includes a third mounting groove provided at the inner side wall of one end of the first mounting groove. A fourth mounting groove corresponding to the third mounting groove is provided at the second mounting groove. The third mounting groove and the fourth mounting groove together form a mounting blind hole. A limiting rod that cooperates with the mounting blind hole is provided in the mounting blind hole. A spring for pushing the limiting rod out of the mounting blind hole is also provided in the mounting blind hole. Both ends of the second hinge column are provided with third annular grooves for the limiting rod to extend into. A rack is provided at the bottom end face of the third annular groove. The surface of the limiting rod in contact with the rack is a rough surface.

[0012] Through the settings of the third mounting groove, the fourth mounting groove, the mounting blind hole, the limiting rod, the spring, the third annular groove, the rack and the rough surface in the present invention, the rotation of the second hinge column is preferably prevented, the stability of the support foot assembly is preferably improved, and the main body of the bracket assembly is prevented from tipping over.

[0013] Preferably, a first annular groove is provided at the center of the second collar. A circular ring is provided at the central through hole of the first collar. A connecting block for connecting the circular ring and the first collar is provided between the circular ring and the first collar. Second annular grooves corresponding to the first annular groove are provided at the opposite side walls of the circular ring and the first collar. The first annular groove and the second annular groove together form an annular hole. The circular ring, the connecting block and the first collar together form a first arc-shaped hole. A limiting ring is provided in the annular hole. A plurality of first vertical rods passing through the first arc-shaped hole are provided on the side wall of the limiting ring. A rotating ring is provided at one end of the first vertical rod away from the limiting ring. A plurality of connecting plates distributed circumferentially along the rotating ring are provided on the outer side wall of the rotating ring. A second arc-shaped hole communicating with the fourth mounting groove is provided on the first collar. A second vertical rod for connecting the limiting rod is provided at one end of the connecting plate away from the rotating ring and passes through the second arc-shaped hole.

[0014] Through the settings of the first annular groove, circular ring, connecting block, second annular groove, annular hole, first arc-shaped hole, limiting ring, first vertical rod, rotating ring, second arc-shaped hole, connecting plate and second vertical rod in the present invention, it is preferably convenient for the staff to fix or release the limit on the second hinge column.

[0015] Preferably, a plurality of first limiting grooves are arranged on the side wall of the sliding column along the length direction of the sliding column, a plurality of limiting plates are arranged on the inner side wall of the limiting ring and respectively extend into the first limiting grooves, and a plurality of second limiting grooves are arranged between adjacent first limiting grooves and are arranged along the axial direction of the sliding column for the limiting plates to extend into.

[0016] Through the settings of the first limiting groove, limiting plate and second limiting groove in the present invention, it is preferably convenient for the staff to limit the first sleeve ring and the second sleeve ring on the side wall of the sliding column.

[0017] Preferably, a baffle is arranged at one end of the sliding column away from the support plate.

[0018] Through the setting of the baffle in the present invention, it preferably prevents the first sleeve ring and the second sleeve ring from detaching from the sliding column.

[0019] Preferably, a sharp corner is arranged at one end of the sliding plate in contact with the ground.

[0020] Through the setting of the sharp corner in the present invention, it is convenient to insert into the ground, prevent the main body of the bracket assembly from shaking, and improve the overall stability of the main body of the bracket assembly.

[0021] Preferably, a plurality of first mounting holes are arranged on the first sleeve ring along the circumferential direction of the first sleeve ring, second mounting holes corresponding to the first sleeve ring are arranged on the second sleeve ring, and bolts are arranged at the first mounting holes and the second mounting holes to pass through the first mounting holes and the second mounting holes to connect the first sleeve ring and the second sleeve ring.

[0022] Through the settings of the first mounting hole, second mounting hole and bolt in the present invention, it is preferably convenient for the staff to connect the first sleeve ring and the second sleeve ring, and is also convenient for the staff to install each component of the limiting mechanism.

[0023] The present invention also provides a usage method for the bracket assembly for surveying instruments, including the following steps,

[0024] S1. Hold the main body of the bracket assembly by hand and stand the main body of the bracket assembly on the ground;

[0025] S2. Then open the support foot assembly so that the support plate supports on the ground;

[0026] S3. After the steps in S2 are completed, the worker twists the rotating ring to drive the connecting plate to move, and pushes the limiting rod into the installation blind hole, thereby releasing the limit on the second hinge column. When the rotating ring rotates, it drives the limiting ring to rotate, so that the limiting plate disengages from the second limiting groove and enters the first limiting groove. Then, the worker lifts the support plate upward. When it reaches a suitable height, the rotating ring is released, and the spring pushes the limiting rod to extend into the third annular groove to limit the rotation of the second hinge column; the limiting plate returns to the second limiting groove to limit the movement of the sliding assembly;

[0027] S4. Place the surveying instrument on the support plate. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the main body of the bracket assembly in Embodiment 1.

[0029] Figure 2 It is a schematic diagram of the support plate in Embodiment 1.

[0030] Figure 3 It is a schematic diagram of the support foot assembly in Embodiment 1.

[0031] Figure 4 It is a schematic diagram of the sliding plate in Embodiment 1.

[0032] Figure 5 It is a schematic diagram of the sliding assembly in Embodiment 1.

[0033] Figure 6 It is a schematic diagram of the second sleeve in Embodiment 1.

[0034] Figure 7 It is a schematic diagram of the limiting mechanism in Embodiment 1.

[0035] Figure 8 It is a schematic diagram of the first sleeve in Embodiment 1.

[0036] Figure 9 It is a schematic diagram of the sliding column in Embodiment 1.

[0037] Figure 10 It is a schematic diagram of the connecting rod in Embodiment 1.

[0038] Figure 11 It is a schematic diagram of the rack, the third annular groove and the limiting column in Embodiment 1.

[0039] Figure 12 It is a schematic diagram of the third installation groove and the first annular groove in Embodiment 1. Detailed Implementation Manner

[0040] To further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention rather than limiting it.

[0041] Embodiment 1

[0042] As Figures 1 - 12 shown, this embodiment provides a support assembly for a surveying instrument, which includes a support assembly main body 100. The support assembly main body 100 includes a support plate 160 for placing the surveying instrument. A plurality of support foot assemblies 150 are arranged at the edge of the support plate 160 and are distributed circumferentially along the support plate 160. A sliding column 110 perpendicular to the support plate 160 is provided at the center of the support plate 160. A sliding assembly 130 is provided at the sliding column 110, which can move axially along the sliding column 110 and push the support foot assemblies 150 to separate outward from the support plate 160.

[0043] Through the settings of the support assembly main body 100, the support plate 160, the support foot assemblies 150, the sliding column 110 and the sliding assembly 130 in this embodiment, the staff can drive the telescoping and opening of the support foot assemblies 150 by pushing the sliding assembly 130. By pushing the position of the sliding assembly 130 on the sliding column 110, the staff can adjust the telescoping length and opening angle of the support foot assemblies 150. Compared with the existing tripod, by adjusting the position of the sliding assembly 130, the support assembly main body 100 can determine the height and opening angle of the support foot assemblies 150, reducing the usage steps and facilitating the staff to quickly open and retract the support assembly main body 100.

[0044] In this embodiment, the support foot assembly 150 includes a first hinge column 310. An articulated groove 210 matching the first hinge column 310 is provided on the side wall of the support plate 160; perpendicular to the first hinge column 310 are provided mounting rods 330 on both side walls at the two ends of the first hinge column 310. A sliding groove 320 is provided on the side wall of the mounting rod 330 along the length direction of the mounting rod 330; a collar 340 is provided at the end of the mounting rod 330 away from the first hinge column 310. A sliding plate 140 passing through the collar 340 and having both ends extending into the sliding groove 320 is provided between the two mounting rods 330.

[0045] Through the settings of the first hinge column 310, the articulated groove 210, the mounting rods 330, the sliding groove 320, the collar 340 and the sliding plate 140 in this embodiment, when the staff adjusts the sliding assembly 130, the sliding assembly 130 drives the sliding plate 140 to slide in the sliding groove 320, thus facilitating the staff to adjust the length of the sliding plate 140 extending out.

[0046] In this embodiment, the sliding assembly 130 includes a collar body sleeved on the sliding column 110. The collar body includes a first collar 530 and a second collar 540 that fits against the first collar 530. A plurality of first mounting grooves 630 are provided on the side wall of the second collar 540 and are distributed circumferentially along the second collar 540. First grooves 620 are provided on the side walls at both ends of the first mounting groove 630. Second mounting grooves 810 corresponding to the first mounting grooves 630 are provided on the side wall of the first collar 530. Second grooves 821 corresponding to the first grooves 620 are provided on the side walls at both ends of the second mounting groove 810. The first groove 620 and the second groove 821 together form a hinged blind hole. A second hinge post 1001 is provided at the hinged blind hole. Limiting posts 1103 extending into the hinged blind hole are provided at both ends of the second hinge post 1001. A connecting rod 120 is provided on the side wall of the second hinge post 1001. A hinge seat 410 is provided on the side wall of the sliding plate 140. One end of the connecting rod 120 away from the second hinge post 1001 is hinged to the hinge seat 410. A limiting mechanism that cooperates with the second hinge post 1001 to limit the rotation of the second hinge post 1001 is provided at the hinged blind hole.

[0047] Through the settings of the first collar 530, the second collar 540, the first mounting groove 630, the first groove 620, the second mounting groove 810, the second groove 821, the hinged blind hole, the second hinge post 1001, the limiting post 1103, the connecting rod 120, the hinge seat 410 and the limiting mechanism in this embodiment, when the staff pushes the first collar 530 and the second collar 540 to move along the sliding column 110, the movement of the first collar 530 and the second collar 540 drives the connecting rod 120 to move, and the connecting rod 120 will drive the sliding plate 140 to move. When the sliding plate 140 separates outward, the second hinge post 1001 and the limiting post 1103 will rotate. At this time, the staff fixes the second hinge post 1001 through the limiting mechanism, thereby preventing the second hinge post 1001 from rotating, and thus preferably improving the stability of the support foot assembly 150.

[0048] In this embodiment, the limiting mechanism includes a third mounting groove 1201 provided on the inner side wall at one end of the first mounting groove 630. A fourth mounting groove 840 corresponding to the third mounting groove 1201 is provided at the second mounting groove 810. The third mounting groove 1201 and the fourth mounting groove 840 together form a mounting blind hole. A limiting rod 640 that fits with the mounting blind hole is provided in the mounting blind hole. A spring 650 for pushing the limiting rod 640 out of the mounting blind hole is also provided in the mounting blind hole. Third annular grooves 1102 for the limiting rod 640 to extend into are provided at both ends of the second hinge post 1001. A rack 1101 is provided at the bottom end face of the third annular groove 1102. The surface of the limiting rod 640 in contact with the rack 1101 is a rough surface.

[0049] Through the settings of the third installation groove 1201, the fourth installation groove 840, the installation blind hole, the limiting rod 640, the spring 650, the third annular groove 1102, the rack 1101 and the rough surface in this embodiment, when the staff pushes the first sleeve ring 530 and the second sleeve ring 540 to the appropriate positions, the limiting rod 640 in the installation blind hole will enter the third annular groove 1102 under the push of the spring 650, and the rough surface at one end of the limiting rod 640 will abut against the surface of the rack 1101, thereby preferably preventing the rotation of the second hinge column 1001, preferably improving the stability of the support foot assembly 150, and preventing the main body 100 of the bracket assembly from tipping over.

[0050] In this embodiment, a first annular groove 1202 is provided at the center of the second sleeve ring 540, and a circular ring 860 is provided at the central through hole of the first sleeve ring 530; a connecting block 830 connecting the circular ring 860 and the first sleeve ring 530 is provided between the circular ring 860 and the first sleeve ring 530, and a second annular groove 870 corresponding to the first annular groove 1202 is provided at the relative side walls of the circular ring 860 and the first sleeve ring 530. The first annular groove 1202 and the second annular groove 870 together form an annular hole; the circular ring 860, the connecting block 830 and the first sleeve ring 530 together form a first arc-shaped hole 880; a limiting ring 660 is provided in the annular hole, a plurality of first vertical rods 730 passing through the first arc-shaped hole 880 are provided at the side wall of the limiting ring 660, a rotating ring 680 is provided at the end of the first vertical rod 730 far away from the limiting ring 660, a plurality of connecting plates 670 distributed along the circumferential direction of the rotating ring 680 are provided at the outer side wall of the rotating ring 680, a second arc-shaped hole 850 communicating with the fourth installation groove 840 is provided on the first sleeve ring 530, and a second vertical rod 710 connecting the limiting rod 640 is provided at the end of the connecting plate 670 far away from the rotating ring 680 and passes through the second arc-shaped hole 850.

[0051] Through the settings of the first annular groove 1202, the circular ring 860, the connecting block 830, the second annular groove 870, the annular hole, the first arc-shaped hole 880, the limiting ring 660, the first vertical rod 730, the rotating ring 680, the second arc-shaped hole 850, the connecting plate 670, and the second vertical rod 710 in this embodiment, when the staff twists the rotating ring 680, the connecting plate 670 is driven to move. The movement of the connecting plate 670 drives the second vertical rod 710 to move within the second arc-shaped hole 850. The movement of the second vertical rod 710 drives the limiting rod 640 to extend into the installation blind hole to press the spring 650, thereby releasing the limitation on the second hinge column 1001. When the staff loosens the rotating ring 680, the limiting rod 640 will, under the push of the spring 650, re-limit the second hinge column 1001. Thus, it is more convenient for the staff to fix or release the limitation on the second hinge column 1001. When the ground is uneven, after the staff twists the rotating ring 680, the supporting foot assembly 150 is separated. The supporting foot assembly 150 can extend to different heights according to the height of the ground to ensure that the upper end surface of the supporting plate 160 is parallel to the ground. Then, the supporting plate 160 is lifted upward. When it reaches the appropriate height, the rotating ring 680 is loosened, and the spring 650 pushes the limiting rod 640 to extend into the third annular groove 1102 to restrict the rotation of the second hinge column 1001.

[0052] In this embodiment, a plurality of first limiting grooves 910 arranged along the length direction of the sliding column 110 are provided on the side wall of the sliding column 110. A plurality of limiting plates 720 respectively extending into the first limiting grooves 910 are provided on the inner side wall of the limiting ring 660. A plurality of second limiting grooves 920 arranged axially along the sliding column 110 and for the limiting plates 720 to extend into are provided between adjacent first limiting grooves 910.

[0053] Through the settings of the first limiting groove 910, the limiting plate 720, and the second limiting groove 920 in this embodiment, when the rotating ring 680 rotates, the limiting ring 660 is driven to rotate, so that the limiting plate 720 disengages from the second limiting groove 920 and enters the first limiting groove 910. Then, the staff lifts the supporting plate 160 upward, and the limiting plate 720 slides along the first limiting groove 910. When adjusted to the appropriate height, the staff loosens the rotating ring 680, and the limiting plate 720 enters the second limiting groove 920. Thus, it is more convenient for the staff to limit the first sleeve ring 530 and the second sleeve ring 540 to the side wall of the sliding column 110.

[0054] In this embodiment, a baffle 930 is provided at one end of the sliding column 110 away from the supporting plate 160.

[0055] Through the setting of the baffle 930 in this embodiment, the first sleeve ring 530 and the second sleeve ring 540 are blocked by the baffle 930 when moving to the bottom end of the sliding column 110. Thus, it is more effective in preventing the first sleeve ring 530 and the second sleeve ring 540 from detaching from the sliding column 110.

[0056] In this embodiment, a sharp corner is provided at one end of the sliding plate 140 that contacts the ground.

[0057] Through the setting of the sharp corner in this embodiment, since most of the construction site ground is muddy, a sharp corner is provided at one end of the sliding plate 140, which is convenient for inserting into the ground, preventing the main body 100 of the support assembly from shaking, and improving the overall stability of the main body 100 of the support assembly.

[0058] In this embodiment, a plurality of first mounting holes 820 are provided on the first collar 530 and are circumferentially distributed along the first collar 530. Second mounting holes 610 corresponding to the first collar 530 are provided on the second collar 540. Bolts 520 passing through the first mounting holes 820 and the second mounting holes 610 and connecting the first collar 530 and the second collar 540 are provided at the first mounting holes 820 and the second mounting holes 610.

[0059] Through the setting of the first mounting holes 820, the second mounting holes 610 and the bolts 520 in this embodiment, the staff can pass the bolts 520 through the first mounting holes 820 and the second mounting holes 610 to connect the first collar 530 and the second collar 540. When the first collar 530 and the second collar 540 are separated, it is convenient for the staff to install the above-mentioned components on the first collar 530 and the second collar 540. Thus, it is more convenient for the staff to connect the first collar 530 and the second collar 540, and it is also convenient for the staff to install the components of the limiting mechanism.

[0060] This embodiment also provides a usage method for the support assembly for surveying instruments, including the following steps.

[0061] S1. Hold the main body 100 of the support assembly by hand and stand the main body 100 of the support assembly on the ground.

[0062] S2. Then open the support foot assembly 150 so that the support plate 160 supports on the ground.

[0063] S3. After the steps in S2 are completed, the staff twists the rotating ring 680 to drive the connecting plate 670 to move, and pushes the limiting rod 640 into the mounting blind hole, thereby releasing the limit on the second hinge column 1001. When the rotating ring 680 rotates, it drives the limiting ring 660 to rotate, so that the limiting plate 720 disengages from the second limiting groove 920 and enters the first limiting groove 910. Then the staff lifts the support plate 160 upward. When it reaches a suitable height, release the rotating ring 680, so that the spring 650 pushes the limiting rod 640 to extend into the third annular groove 1102 to limit the rotation of the second hinge column 1001. The limiting plate 720 returns to the second limiting groove 920 to limit the movement of the sliding assembly 130.

[0064] S4. Place the surveying instrument on the support plate 160.

[0065] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on one or several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0066] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the embodiments is only part of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design, without creative efforts, a structural manner and an embodiment similar to the technical solution without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A support assembly for a surveying instrument, characterized in that: It includes a bracket assembly body (100). The bracket assembly body (100) includes a support plate (160) for placing a surveying instrument. A plurality of support foot assemblies (150) are provided at the edge of the support plate (160) and are circumferentially distributed along the support plate (160). A sliding column (110) perpendicular to the support plate (160) is provided at the center of the support plate (160). A sliding assembly (130) is provided at the sliding column (110). The sliding assembly (130) can move axially along the sliding column (110) and push the support foot assemblies (150) to separate outward from the support plate (160). The support foot assembly (150) includes a first hinge column (310). A hinge groove (210) matching the first hinge column (310) is provided on the side wall of the support plate (160). Mounting rods (330) perpendicular to the first hinge column (310) are provided on the side walls at both ends of the first hinge column (310). A sliding groove (320) is provided on the side wall of the mounting rod (330) along the length direction of the mounting rod (330). A collar (340) is provided at the end of the mounting rod (330) far from the first hinge column (310). A sliding plate (140) passing through the collar (340) and having both ends extending into the sliding groove (320) is provided between the two mounting rods (330). The sliding assembly (130) includes a collar body sleeved on the sliding column (110). The collar body includes a first collar (530) and a second collar (540) fitting with the first collar (530). A plurality of first mounting grooves (630) are provided on the side wall of the second collar (540) and are circumferentially distributed along the second collar (540). First grooves (620) are provided on the side walls at both ends of the first mounting groove (630). A second mounting groove (810) corresponding to the first mounting groove (630) is provided on the side wall of the first collar (530). Second grooves (821) corresponding to the first grooves (620) are provided on the side walls at both ends of the second mounting groove (810). The first groove (620) and the second groove (821) together form a hinge blind hole. A second hinge column (1001) is provided at the hinge blind hole. Limit columns (1103) extending into the hinge blind hole are provided at both ends of the second hinge column (1001). A connecting rod (120) is provided on the side wall of the second hinge column (1001). A hinge seat (410) is provided on the side wall of the sliding plate (140). The end of the connecting rod (120) far from the second hinge column (1001) is hinged to the hinge seat (410). A limit mechanism matching the second hinge column (1001) to limit the rotation of the second hinge column (1001) is provided at the hinge blind hole. A first annular groove (1202) is provided at the center of the second set of rings (540), and a circular ring (860) is provided at the central through hole of the first set of rings (530); a connecting block (830) connecting the circular ring (860) and the first set of rings (530) is provided between the circular ring (860) and the first set of rings (530), and a second annular groove (870) corresponding to the first annular groove (1202) is provided at the opposite side walls of the circular ring (860) and the first set of rings (530), and the first annular groove (1202) and the second annular groove (870) together form an annular hole; the circular ring (860), the connecting block (830) and the first set of rings (530) together form a first arc-shaped hole (880); a limiting ring (660) is provided in the annular hole, a plurality of first vertical rods (730) passing through the first arc-shaped hole (880) are provided at the side wall of the limiting ring (660), a rotating ring (680) is provided at the end of the first vertical rod (730) far from the limiting ring (660), a plurality of connecting plates (670) distributed circumferentially along the rotating ring (680) are provided at the outer side wall of the rotating ring (680), a second arc-shaped hole (850) communicating with the fourth installation groove (840) is provided on the first set of rings (530), and a second vertical rod (710) connecting a limiting rod (640) is provided at the end of the connecting plate (670) far from the rotating ring (680) and passes through the second arc-shaped hole (850); A baffle (930) is provided at the end of the sliding column (110) far from the support plate (160).

2. The support assembly for a surveying instrument according to claim 1, characterized in that: The limiting mechanism includes a third installation groove (1201) provided at the inner side wall of one end of the first installation groove (630), a fourth installation groove (840) corresponding to the third installation groove (1201) is provided at the second installation groove (810), and the third installation groove (1201) and the fourth installation groove (840) together form an installation blind hole; a limiting rod (640) matching the installation blind hole is provided in the installation blind hole, and a spring (650) for pushing the limiting rod (640) out of the installation blind hole is also provided in the installation blind hole; third annular grooves (1102) for the limiting rod (640) to extend into are provided at both ends of the second hinge column (1001), a rack (1101) is provided at the bottom end surface of the third annular groove (1102), and the surface of the limiting rod (640) in contact with the rack (1101) is a rough surface.

3. The support assembly for a surveying instrument according to claim 2, characterized in that: A plurality of first limiting grooves (910) arranged along the length direction of the sliding column (110) are provided at the side wall of the sliding column (110), a plurality of limiting plates (720) respectively extending into the first limiting grooves (910) are provided at the inner side wall of the limiting ring (660), and a plurality of second limiting grooves (920) arranged axially along the sliding column (110) and for the limiting plates (720) to extend into are provided between adjacent first limiting grooves (910).

4. The support assembly for a surveying instrument according to claim 2, characterized in that: A sharp corner is provided at the end of the sliding plate (140) in contact with the ground.

5. The support assembly for a surveying instrument according to claim 2, characterized in that: A plurality of first mounting holes (820) distributed circumferentially along the first sleeve ring (530) are provided on the first sleeve ring (530), second mounting holes (610) corresponding to the first sleeve ring (530) are provided on the second sleeve ring (540), and bolts (520) passing through the first mounting holes (820) and the second mounting holes (610) to connect the first sleeve ring (530) and the second sleeve ring (540) are provided at the first mounting holes (820) and the second mounting holes (610).

6. A method for using a support assembly for a surveying instrument, which is realized by the support assembly for a surveying instrument according to any one of claims 1-5, and includes the following steps. S1. Hold the main body (100) of the support assembly by hand and stand the support assembly main body (100) on the ground. S2. Then open the support foot assembly (150) so that the support plate (160) supports on the ground. S3. After the steps in S2 are completed, the staff twists the rotating ring (680), so that the rotating ring (680) drives the connecting plate (670) to move, and pushes the limiting rod (640) into the installation blind hole, thereby releasing the limit on the second hinge column (1001). When the rotating ring (680) rotates, it drives the limiting ring (660) to rotate, so that the limiting plate (720) disengages from the second limiting groove (920) and enters the first limiting groove (910). Then the staff lifts the support plate (160) upward. When it reaches a suitable height, release the rotating ring (680), so that the spring (650) pushes the limiting rod (640) to extend into the third annular groove (1102) to limit the rotation of the second hinge column (1001); the limiting plate (720) returns to the second limiting groove (920) to limit the movement of the sliding assembly (130). S4. Place the surveying instrument on the support plate (160).

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