Land engineering surveying and mapping device

Abstract

The present invention relates to the field of measurement technology, and more specifically, it relates to a land engineering surveying and mapping device, comprising a support seat, on which three groups of leg assemblies are rotatably mounted, and reinforcement assemblies are arranged between the three groups of leg assemblies, a gravity leveling assembly is arranged at the center position of the support seat, and the gravity leveling assembly extends through the support seat to one end above which a surveying instrument is detachably arranged, the leg assembly comprises a main leg rotatably mounted on the support seat, and also comprises a secondary leg slidably mounted on the main leg, and a positioning block arranged on the main leg, the reinforcement assembly comprises a connecting rod rotatably mounted on the three groups of main legs, and a center seat for rotatably connecting the three connecting rods. The present invention solves the problem of tilted placement and poor stability of equipment due to uneven ground, especially complex terrain such as slopes, during land engineering surveying and mapping.

Description

Technical Field

[0001] The present invention relates to the field of surveying technology, and more particularly to a land engineering surveying and mapping device. Background Art

[0002] The stability and accuracy of land engineering surveying equipment are crucial. However, in the actual surveying process, surveyors often encounter uneven ground, especially complex terrain such as slopes, which poses great challenges to the placement and use of surveying equipment.

[0003] Traditional land engineering surveying and mapping equipment often lacks sufficient adaptability and adjustment capabilities. When the ground is tilted or uneven, the equipment often cannot maintain a horizontal and stable state. In this case, surveyors have to take various temporary measures to try to stabilize the equipment, such as placing stones and wooden boards, etc. However, these methods are not only cumbersome and inefficient, but also cannot fundamentally solve the problem. In addition, equipment tilt will also cause errors in the surveying and mapping results, seriously affecting the accuracy and reliability of the surveying and mapping data.

[0004] Specifically, when the ground is uneven, the surveying and mapping equipment is prone to tilt during placement, causing the optical system or sensor of the surveying and mapping instrument to be unable to maintain a horizontal state. This will not only affect the precision and accuracy of the surveying and mapping, but also increase the operating difficulty and workload of the surveying and mapping personnel. At the same time, the tilt of the equipment may also cause the equipment to shake or shift during the surveying and mapping process, further affecting the stability and reliability of the surveying and mapping results.

[0005] In order to solve the above problems, a land engineering surveying and mapping device is proposed. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the problems existing in the prior art, the present invention provides a land engineering surveying and mapping device to solve the problem of equipment tilt and poor stability caused by uneven ground, especially complex terrain such as slopes, during land engineering surveying mentioned in the background technology.

[0008] (II) Technical solution

[0009] To achieve the above object, the present invention provides the following technical solution: a land engineering surveying and mapping device, comprising a support seat, on which three groups of leg assemblies are rotatably mounted, and reinforcement assemblies are arranged between the three groups of leg assemblies;

[0010] A gravity leveling component is provided at the center of the support seat, and the gravity leveling component extends through the support seat to an end above which a surveying instrument is detachably provided;

[0011] The leg assembly includes a main leg rotatably mounted on the support seat, an auxiliary leg slidably mounted on the main leg, and a positioning block arranged on the main leg;

[0012] The reinforcement assembly includes connecting rods rotatably mounted on the three sets of main legs, and a center seat for rotatably connecting the three connecting rods;

[0013] A spring groove and a guide groove are provided at the top of the center seat, and a driving assembly corresponding to the bottom end of the gravity leveling assembly is arranged in the spring groove and the guide groove. A hydraulic assembly is arranged in an array at the lower end of the side wall of the center seat, and one end of the hydraulic assembly is driven by the driving assembly in contact with the driving assembly. An end of the hydraulic assembly away from the center seat is connected to the lower end of one side of the main leg and correspondingly pushes the positioning block to lock the position of the auxiliary leg.

[0014] The present invention is further configured such that a contact plate is provided at one end of the connecting rod close to the side wall of the main leg, and the contact plate is arranged in an L shape, one section of the contact plate is welded to the side wall of the connecting rod, and the other end of the contact plate contacts the side wall of the main leg.

[0015] The present invention is further configured such that the spring groove and the guide groove are interconnected and coaxially arranged, and the inner diameter of the spring groove is larger than the inner diameter of the guide groove;

[0016] The driving assembly includes a push spring arranged in the spring groove, a driving rod movably inserted in the spring groove and the guide groove, and a retaining ring arranged at the upper end of the circumferential side wall of the driving rod.

[0017] The present invention is further configured such that the central seat circumferential side wall is provided with three groups of through holes in an annular array, and the three groups of through holes are all connected to the guide groove;

[0018] The hydraulic assembly includes a spring sleeve arranged at the through hole position on the center seat, an extrusion spring and a piston rod arranged in the spring sleeve, and an oil pipe connected to one end of the spring sleeve;

[0019] An oil groove and an oil inlet hole are provided on the main supporting leg, and the positioning block is movably arranged in the oil groove;

[0020] One end of the oil pipe away from the spring sleeve is connected to the oil inlet hole, and the oil pipe is filled with hydraulic oil.

[0021] The present invention is further configured such that a slide rail groove is provided on the main leg, and the auxiliary leg is slidably installed in the slide rail groove, a rack is provided on one side of the auxiliary leg close to the main leg, and the rack is matched and clamped with a positioning block.

[0022] The present invention is further configured such that a pull wire is provided in the oil pipe, and two ends of the pull wire are respectively fixedly connected to the piston column and the positioning block.

[0023] The present invention is further configured such that the gravity leveling assembly comprises a center ball rotatably mounted at the center position of the support seat, and a mounting screw and a pendulum member disposed on the center ball;

[0024] The mounting screw is arranged above the support seat, and the pendulum component is arranged below the support seat.

[0025] The present invention is further configured such that a plug-in slot is provided at the bottom end of the pendulum member, and a magnetic attraction block is provided in the plug-in slot;

[0026] A movable anti-dropout cavity is provided at the axis center of the driving rod, and a plug-in rod is arranged inside the movable anti-dropout cavity. The plug-in rod and the magnetic attraction block are magnetically attracted to each other, and the plug-in rod and the plug-in slot are correspondingly plugged.

[0027] The present invention is further configured such that a tension spring is further provided inside the plug-in slot, and one end of the tension spring is fixedly connected to the inner wall of the plug-in slot, and the other end of the tension spring is fixedly connected to the magnetic attraction block;

[0028] A strip groove is formed on the side wall of the plug-in slot, and an unlocking rod is slidably installed in the strip groove, and one end of the unlocking rod is fixedly connected to the side wall of the magnetic attraction block.

[0029] The present invention is further configured such that the pendulum component includes a telescopic sleeve arranged on the central ball, a downward pressure spring arranged in the telescopic sleeve, a telescopic rod movably plugged into an end of the telescopic sleeve away from the central ball, and a ball pendulum arranged at the lower end of the telescopic rod.

[0030] (III) Beneficial effects

[0031] Compared with the prior art, the present invention provides a land engineering surveying and mapping device, which has the following beneficial effects:

[0032] The present invention cooperates with the center seat and the gravity leveling assembly on the reinforcement assembly, and based on the gravity leveling assembly, quickly adjusts the level of the equipment so that the equipment maintains a horizontal and vertical stable state. At the same time, when the equipment is adjusted to a horizontal and vertical stable state, the gravity leveling assembly pushes the driving assembly, and drives the positioning block through the hydraulic assembly to lock the length of the telescopic leg assembly, and realizes the connection between the center seat and the gravity leveling assembly through the plug-in rod, thereby making the overall structure of the surveying instrument more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the land engineering surveying and mapping device.

[0034] Figure 2 for Figure 2 Enlarged structural diagram at A in the middle.

[0035] Figure 3 Schematic diagram of the explosion structure of reinforcement components and drive components.

[0036] Figure 4 for Figure 3 Enlarged structural diagram at B in the middle.

[0037] Figure 5 This is a schematic diagram of the internal structure when the gravity leveling component and the center seat correspond.

[0038] Figure 6 for Figure 5 Enlarged structural diagram at point C in the middle.

[0039] Figure 7 It is a schematic diagram of the cross-sectional structure of the oil inlet hole on the main leg in the leg assembly.

[0040] Figure 8 for Figure 7 Enlarged structural diagram at D in the middle.

[0041] In the figure: 1. Support seat; 2. Leg assembly; 201. Main leg; 202. Auxiliary leg; 203. Positioning block; 204. Oil tank; 205. Oil inlet hole; 206. Slide rail groove; 207. Rack; 3. Reinforcement assembly; 301. Connecting rod; 302. Center seat; 303. Spring groove; 304. Guide groove; 305. Contact plate; 306. Through hole; 4. Gravity leveling assembly; 401. Center ball; 402. Mounting screw; 5. Drive assembly; 501. Push spring ; 502, driving rod; 503, retaining ring; 504, movable anti-disengagement chamber; 505, plug-in rod; 6, hydraulic assembly; 601, spring sleeve; 602, extrusion spring; 603, piston column; 604, oil pipe; 605, pull wire; 7, pendulum piece; 701, plug-in slot; 702, magnetic block; 703, tension spring; 704, strip slot; 705, unlocking rod; 706, telescopic sleeve; 707, downward pressure spring; 708, telescopic rod; 709, ball pendulum; 8, surveying instrument. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0044] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0045] For examples, see Figure 1 - Figure 8 , a land engineering surveying and mapping device, comprising a support base 1, on which three groups of leg assemblies 2 are rotatably mounted, and between which reinforcement assemblies 3 are arranged;

[0046] A gravity leveling component 4 is disposed at the center of the support base 1, and the gravity leveling component 4 passes through the support base 1 and extends to one end above the support base 1, and a surveying instrument 8 is detachably disposed thereon;

[0047] The leg assembly 2 includes a main leg 201 rotatably mounted on the support base 1, an auxiliary leg 202 slidably mounted on the main leg 201, and a positioning block 203 disposed on the main leg 201;

[0048] The reinforcement assembly 3 includes a connecting rod 301 rotatably mounted on three sets of main legs 201, and a central seat 302 for rotatably connecting the three connecting rods 301;

[0049] A spring groove 303 and a guide groove 304 are provided at the top of the center seat 302, and a driving assembly 5 corresponding to the bottom end of the gravity leveling assembly 4 is arranged in the spring groove 303 and the guide groove 304. A hydraulic assembly 6 is arranged in an array at the lower end of the side wall of the center seat 302, and one end of the hydraulic assembly 6 is driven by the driving assembly 5. The end of the hydraulic assembly 6 away from the center seat 302 is connected to the lower end of one side of the main leg 201 and correspondingly pushes the positioning block 203 to lock the position of the auxiliary leg 202.

[0050] The three groups of leg assemblies 2 are rotatably installed in a circular array at the bottom of the support base 1. The three groups of main legs 201 are provided with connecting ears on one side close to the axis, and the three groups of connecting ears are also provided with a circular array on the upper end of the side wall of the center base 302. The two ends of the connecting rod 301 are rotatably connected to the connecting ears on the main legs 201 and the center base 302 respectively. When the equipment is in use, the three groups of leg assemblies 2 are rotated and expanded to the maximum rotation angle, so that the three connecting rods 301 remain in a horizontal state, thereby reinforcing and supporting the three groups of leg assemblies 2, reducing the rotation of the main legs 201 toward the axis, and causing the equipment to be unbalanced.

[0051] Furthermore, the leg assembly 2 is composed of a main leg 201 and a slidably mounted auxiliary leg 202, so that the device can adjust the length of each leg assembly 2 so that it can still maintain the horizontal stability of the device after being placed on an uneven or inclined road surface.

[0052] Specifically, when in use, the leg assembly 2 of the equipment is first rotated to the maximum angle, and then the three groups of leg assemblies 2 are placed on the ground. If the ground is uneven, there will be a tilt. Since the three groups of leg assemblies 2 have the same length in the initial state, the equipment is in a tilted state at this time. Among them, the surveying instrument 8 is not installed between the gravity leveling assembly 4 first, so the gravity leveling assembly 4 remains in a vertical state under the action of gravity, thereby separating from the top of the center seat 302 and forming a certain angle with the top surface of the center seat 302, and the angle is the tilt angle. In order to quickly level the equipment and maintain the level of the surveying instrument 8, according to the tilt direction of the angle, the support seat 1 is moved and adjusted with the leg assembly 2 located highest on the ground among the three leg assemblies 2 as the base point until the support seat 1 and the gravity leveling assembly 4 are adjusted to a mutually perpendicular state. During the adjustment process, the leg assemblies 2 at the two low points are moved upward, so that the auxiliary legs 202 on the leg assemblies 2 slide and extend along the main legs 201 and touch the ground, thereby adjusting the equipment to a horizontal and stable state.

[0053] Among them, when the equipment is adjusted to be horizontal, the bottom end of the gravity leveling component 4 will be flush with the top of the center seat 302, thereby resisting and pushing the driving component 5 on the center seat 302. The driving component 5 moves downward to push the hydraulic component 6, and the positioning block 203 on the main leg 201 is pushed by the hydraulic pressure, so that the positioning block 203 squeezes and locks the position of the auxiliary leg 202, that is, the length of the extended leg assembly 2 is fixed to avoid retraction. After the equipment is adjusted to be horizontal and stable, the surveying instrument 8 is installed on the top of the gravity leveling component 4 for surveying and mapping.

[0054] Preferably, the gravity leveling assembly 4 can not only automatically level the surveying instrument 8, but also serve as an adjustment reference when leveling the equipment, thereby improving the efficiency of equipment leveling. After the equipment is leveled and stably placed, the lengths of the three leg assemblies 2 are locked synchronously by contacting the bottom end of the gravity leveling assembly 4, thereby saving the trouble of manually locking the leg assemblies 2 after telescopic adjustment one by one.

[0055] A contact plate 305 is provided at one end of the side wall of the connecting rod 301 close to the main supporting leg 201 , and the contact plate 305 is L-shaped. One section of the contact plate 305 is welded to the side wall of the connecting rod 301 , and the other end of the contact plate 305 contacts the side wall of the main supporting leg 201 .

[0056] When the three main legs 201 rotate to the maximum expansion angle, the connecting rod 301 is in a horizontal state, and the contact plate 305 contacts the side wall of the main leg 201, so that when the equipment is adjusted horizontally, when the gravity leveling component 4 and the drive component 5 contact each other, the center seat 302 will not be driven to move downward, thereby causing the drive component 5 to move downward, and then the positioning block 203 is pushed by the hydraulic component 6 to lock the position of the auxiliary leg 202.

[0057] The spring groove 303 and the guide groove 304 are interconnected and coaxially arranged, and the inner diameter of the spring groove 303 is larger than the inner diameter of the guide groove 304;

[0058] The driving assembly 5 includes a push spring 501 arranged in the spring groove 303 , a driving rod 502 movably inserted in the spring groove 303 and the guide groove 304 , and a retaining ring 503 arranged at the upper end of the circumferential side wall of the driving rod 502 .

[0059] The spring groove 303 is arranged above the guide groove 304. Because the inner diameter of the spring groove 303 is larger than the inner diameter of the guide groove 304, a step is formed at the intersection. One end of the push spring 501 contacts the step, that is, the bottom of the spring groove 303, and the other end of the push spring 501 contacts the retaining ring 503 at the top of the driving rod 502. The driving rod 502 is movably inserted in the push spring 501, and its bottom end is always located in the guide groove 304 under the push of the push spring 501. Under the resistance of the gravity leveling component 4, the driving rod 502 moves down to the bottom of the guide groove 304 to push the hydraulic component 6, and then pushes the positioning block 203 to lock the position of the auxiliary support leg 202. At the same time, when the driving rod 502 moves down to the bottom of the guide groove 304, its top is flush with the top of the center seat 302, and the retaining ring 503 moves down accordingly and is inserted into the spring groove 303.

[0060] Specifically, when the equipment is placed on the ground in an inclined setting, the gravity leveling component 4 and the driving component 5 on the center seat 302 are separated. Without the obstruction of the gravity leveling component 4, the pushing spring 501 pushes the retaining ring 503 to move upward, so that the top of the driving rod 502 protrudes from the top of the center seat 302, and the bottom end moves up to the top of the hydraulic component 6, unlocking the locking of the auxiliary support leg 202 by the positioning block 203. When the equipment is adjusted horizontally, the gravity leveling component 4 gradually approaches the center position of the center seat 302 until it becomes a coaxial setting, thereby realizing the horizontal adjustment of the equipment.

[0061] When the equipment is adjusted to a level, under the action of gravity, the auxiliary leg 202 slides on the main leg 201, and the bottom end always touches the ground, thereby adjusting the length of the leg assembly 2. During the process of adjusting the level of the equipment, the gravity leveling assembly 4 gradually approaches the center position of the center seat 302, which will push the driving rod 502 protruding from the center seat 302 to move downward, thereby pushing the hydraulic assembly 6 to lock the position of the auxiliary leg 202, thereby ensuring the stability of the equipment after adjustment.

[0062] The central seat 302 has three groups of through holes 306 in an annular array on the circumferential side wall, and the three groups of through holes 306 are all connected to the guide groove 304;

[0063] The hydraulic assembly 6 includes a spring sleeve 601 disposed at the through hole position on the center seat 302, an extrusion spring 602 and a piston rod 603 disposed in the spring sleeve 601, and an oil pipe 604 connected to one end of the spring sleeve 601;

[0064] The main leg 201 is provided with an oil groove 204 and an oil inlet hole 205, and the positioning block 203 is movably arranged in the oil groove 204;

[0065] One end of the oil pipe 604 away from the spring sleeve 601 is connected to the oil inlet hole 205 , and the oil pipe 604 is filled with hydraulic oil.

[0066] There are three groups of hydraulic components 6, corresponding to three groups of leg components 2 respectively. The inner diameter of the through hole 306 is the same as the inner diameter of the spring sleeve 601. The end of the piston column 603 away from the extrusion spring 602 is spherical. When the equipment is tilted and the gravity leveling component 4 and the center seat 302 are separated, the driving rod 502 moves up, so that the spherical end of the piston column 603 enters the guide groove 304 under the action of the extrusion spring 602 and is located below the driving rod 502. The spherical surface makes it easy for the driving rod 502 to push the piston column 603 to retract into the spring sleeve 601 when the driving rod 502 moves down.

[0067] Furthermore, the piston rod 603 is retracted into the spring sleeve 601 , and the hydraulic oil enters the oil groove 204 through the oil pipe and the oil inlet hole 205 , thereby pushing the positioning block 203 to move toward the auxiliary leg 202 , locking the length of the leg assembly 2 .

[0068] A slide rail groove 206 is provided on the main leg 201 , and the auxiliary leg 202 is slidably installed in the slide rail groove 206 . A rack 207 is provided on one side of the auxiliary leg 202 close to the main leg 201 , and the rack 207 is matched and snap-fitted with the positioning block 203 .

[0069] A triangular block is provided at the bottom end of the auxiliary leg 202 for contacting the ground, and a hand-shift block is provided at the end of the auxiliary leg 202 away from the triangular block for manual retraction of the auxiliary leg 202 after the equipment is used. The tooth groove of the rack 207 is triangular, so that the positioning block 203 can be better correspondingly plugged in, thereby realizing the length locking of the main leg 201 and the auxiliary leg 202.

[0070] A pull wire 605 is provided in the oil pipe 604 , and two ends of the pull wire 605 are fixedly connected to the piston column 603 and the positioning block 203 respectively.

[0071] Under the action of the extrusion spring 602, when the piston rod 603 enters the guide groove 304, the pull wire 605 drives the positioning block 203 to be located in the oil groove 204, thereby preventing the positioning block 203 from protruding from the oil groove 204 and getting stuck with the rack 207 during the leveling process of the equipment.

[0072] The gravity leveling assembly 4 includes a center ball 401 rotatably mounted at the center of the support base 1, and a mounting screw 402 and a pendulum member 7 disposed on the center ball 401;

[0073] The mounting screw 402 is disposed above the support base 1 , and the pendulum member 7 is disposed below the support base 1 .

[0074] A ball groove is provided on the support seat 1, and the center ball 401 is rotatably installed in the ball groove, and the center ball 401 protrudes from the upper and lower ends of the support seat 1. Under the action of the gravity of the pendulum member 7, the mounting screw 402 on the center ball 401 is always vertically upward. A threaded tube is provided at the bottom of the surveying instrument 8, and the upper end of the center ball 401 is threadedly installed through the mounting screw 402 and the threaded tube of the surveying instrument 8.

[0075] A plug-in slot 701 is provided at the bottom end of the pendulum member 7, and a magnetic attraction block 702 is provided in the plug-in slot 701;

[0076] A movable anti-dropout cavity 504 is provided at the axis of the driving rod 502 , and a plug-in rod 505 is provided inside the movable anti-dropout cavity 504 . The plug-in rod 505 and the magnetic block 702 are magnetically attracted to each other, and the plug-in rod 505 and the plug-in slot 701 are plugged in correspondence.

[0077] When the device is adjusted to a horizontal position, the plug-in slot 701 on the pendulum member 7 corresponds to the plug-in rod 505, and the plug-in rod 505 is magnetically plugged into the plug-in slot 701 through the suction force of the magnetic suction block 702, wherein the plug-in rod 505 is connected to the driving rod 502 through the movable anti-disconnection cavity 504, so the plug-in rod 505 will not be lost, and when plugged into the plug-in slot 701 on the pendulum member 7, a part of it is still located in the driving rod 502, so that the pendulum member 7 and the center seat 302 are connected together, that is, the plug-in rod 505 does not disengage from the plug-in slot 701, and the pendulum member 7 and the center seat 302 cannot be misaligned, so that the surveying instrument 8 can be stably kept horizontal, and the overall equipment has high stability. Otherwise, after the equipment adjustment is completed and the surveying instrument 8 is installed, the pendulum member 7 has nothing to limit the position, and the surveying instrument 8 will swing left and right during surveying, thereby making the measurement data unusable.

[0078] A tension spring 703 is also provided inside the plug-in slot 701, and one end of the tension spring 703 is fixedly connected to the inner wall of the plug-in slot 701, and the other end of the tension spring 703 is fixedly connected to the magnetic attraction block 702;

[0079] A strip groove 704 is formed on the side wall of the plug slot 701 , and an unlocking rod 705 is slidably installed in the strip groove 704 , and one end of the unlocking rod 705 is fixedly connected to the side wall of the magnetic block 702 .

[0080] The magnetic block 702 is set by the tension spring 703 so that the initial position of the magnetic block 702 is located in the middle of the plug-in slot 701. The magnetic force is sufficient to attract the plug-in rod 505 upward for plugging. The pendulum component 7 and the center seat 302 are connected together after the plug-in rod 505 is plugged in. When the equipment needs to be stored after the mapping is completed, the leg assembly 2 needs to be retracted, so the pendulum component 7 and the center seat 302 need to be separated. Specifically, the driving rod 502 needs to be moved upward, and the piston column 603 is pushed by the extrusion spring 602 to drive the pull wire 605 to pull the positioning block 203 into the oil groove 204, so as to contact the locking of the position of the auxiliary leg 202.

[0081] Therefore, by pressing down the unlocking rod 705, the magnetic block 702 is driven to push the plug rod 505 downward and retract into the driving rod 502, so that the pendulum component 7 and the center seat 302 can be separated, and the device can be stored.

[0082] The pendulum member 7 includes a telescopic sleeve 706 arranged on the central ball 401, a downward pressure spring 707 arranged in the telescopic sleeve 706, a telescopic rod 708 movably plugged into the end of the telescopic sleeve 706 away from the central ball, and a ball pendulum 709 arranged at the lower end of the telescopic rod 708.

[0083] When the leg assembly 2 of the equipment is turned open and in a horizontal state, the downward pressure spring 707 pushes the telescopic rod 708 down to the longest limit, that is, the ball pendulum 709 contacts the push drive rod 502 and is flush with the top of the center seat 302, wherein the elastic coefficient of the downward pressure spring 707 is much greater than the elastic coefficient of the push spring 501.

[0084] The pendulum member 7 here is designed to be telescopic so that the device can be stored easily when not in use. When stored, the leg assembly 2 rotates and contracts, so that the connecting rod 301 pushes the center seat 302 upward. The pendulum member 7 and the center seat 302 are in contact with each other when unfolded. Therefore, the pendulum member 7 needs to be designed to be telescopic to provide space for the movement of the center seat 302 when stored.

[0085] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, welding is preferred for all fixed connections. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and deformations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A land engineering surveying and mapping device, characterized in that: It comprises a support base (1), on which three groups of leg assemblies (2) are rotatably mounted, and a reinforcement assembly (3) is arranged between the three groups of leg assemblies (2); A gravity leveling component (4) is disposed at the center of the support base (1), and the gravity leveling component (4) passes through the support base (1) and extends to an end above the support base, where a surveying instrument (8) is detachably disposed; The leg assembly (2) comprises a main leg (201) rotatably mounted on the support seat (1), a secondary leg (202) slidably mounted on the main leg (201), and a positioning block (203) arranged on the main leg (201); The reinforcement assembly (3) comprises a connecting rod (301) rotatably mounted on the three groups of main legs (201), and a central seat (302) for rotatably connecting the three connecting rods (301); The top of the center seat (302) is provided with a spring groove (303) and a guide groove (304), and a driving assembly (5) is arranged in the spring groove (303) and the guide groove (304) so ​​as to contact with the bottom of the gravity leveling assembly (4). A hydraulic assembly (6) is arranged in an array at the lower end of the side wall of the center seat (302), and one end of the hydraulic assembly (6) contacts with the driving assembly (5) for driving. One end of the hydraulic assembly (6) away from the center seat (302) is connected to the lower end of one side of the main leg (201) and correspondingly pushes the positioning block (203) to lock the position of the auxiliary leg (202).

2. A land engineering surveying and mapping device according to claim 1, characterized in that: A contact plate (305) is provided at one end of the side wall of the connecting rod (301) close to the main supporting leg (201), and the contact plate (305) is arranged in an L shape, one section of the contact plate (305) is welded to the side wall of the connecting rod (301), and the other end of the contact plate (305) contacts the side wall of the main supporting leg (201).

3. A land engineering surveying and mapping device according to claim 2, characterized in that: The spring groove (303) and the guide groove (304) are interconnected and coaxially arranged, and the inner diameter of the spring groove (303) is larger than the inner diameter of the guide groove (304); The driving assembly (5) comprises a pushing spring (501) arranged in the spring groove (303), a driving rod (502) movably inserted in the spring groove (303) and the guide groove (304), and a retaining ring (503) arranged at the upper end of the circumferential side wall of the driving rod (502).

4. A land engineering surveying and mapping device according to claim 3, characterized in that: The central seat (302) has three groups of through holes (306) in an annular array on the circumferential side wall, and the three groups of through holes (306) are all connected to the guide groove (304); The hydraulic assembly (6) comprises a spring sleeve (601) arranged at a through hole position on the central seat (302), a compression spring (602) and a piston rod (603) arranged in the spring sleeve (601), and an oil pipe (604) connected to one end of the spring sleeve (601); The main support leg (201) is provided with an oil groove (204) and an oil inlet hole (205), and the positioning block (203) is movably arranged in the oil groove (204); One end of the oil pipe (604) away from the spring sleeve (601) is connected to the oil inlet hole (205), and the oil pipe (604) is filled with hydraulic oil.

5. A land engineering surveying and mapping device according to claim 4, characterized in that: The main support leg (201) is provided with a slide rail groove (206), and the auxiliary support leg (202) is slidably installed in the slide rail groove (206); a rack (207) is provided on a side of the auxiliary support leg (202) close to the main support leg (201), and the rack (207) and the positioning block (203) are matched and snap-connected.

6. A land engineering surveying and mapping device according to claim 5, characterized in that: A pull wire (605) is arranged in the oil pipe (604), and two ends of the pull wire (605) are fixedly connected to the piston column (603) and the positioning block (203) respectively.

7. A land engineering surveying and mapping device according to claim 6, characterized in that: The gravity leveling assembly (4) comprises a central ball (401) rotatably mounted at the center of the support seat (1), and a mounting screw (402) and a pendulum member (7) arranged on the central ball (401); The mounting screw (402) is arranged above the support seat (1), and the pendulum member (7) is arranged below the support seat (1).

8. A land engineering surveying and mapping device according to claim 7, characterized in that: The bottom end of the pendulum member (7) is provided with a plug-in slot (701), and a magnetic attraction block (702) is arranged in the plug-in slot (701); The driving rod (502) is provided with a movable anti-disconnection cavity (504) at the axial center position, and a plug-in rod (505) is arranged inside the movable anti-disconnection cavity (504). The plug-in rod (505) and the magnetic attraction block (702) are magnetically attracted to each other, and the plug-in rod (505) and the plug-in slot (701) are correspondingly plugged.

9. A land engineering surveying and mapping device according to claim 8, characterized in that: A tension spring (703) is also provided inside the plug-in slot (701), and one end of the tension spring (703) is fixedly connected to the inner wall of the plug-in slot (701), and the other end of the tension spring (703) is fixedly connected to the magnetic attraction block (702); The side wall of the plug slot (701) is provided with a strip groove (704), and an unlocking rod (705) is slidably installed in the strip groove (704), and one end of the unlocking rod (705) is fixedly connected to the side wall of the magnetic attraction block (702).

10. A land engineering surveying and mapping device according to claim 9, characterized in that: The pendulum component (7) includes a telescopic sleeve (706) arranged on the central ball (401), a downward pressure spring (707) arranged in the telescopic sleeve (706), a telescopic rod (708) movably plugged into the end of the telescopic sleeve (706) away from the central ball, and a ball pendulum (709) arranged at the lower end of the telescopic rod (708).

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