Centering adjusting device for surveying and mapping instrument

Abstract

The utility model provides a centering adjusting device for a surveying and mapping instrument. The centering adjusting device comprises a foot stool and an adjusting platform arranged on the foot stool, the adjusting platform comprises an upper positioning plate used for installing a surveying and mapping instrument and a lower positioning plate used for being connected with the foot stool, the upper positioning plate and the lower positioning plate are connected through a connecting piece, and light through holes are formed in the positions, corresponding to the surveying and mapping instrument, of the upper positioning plate, the connecting piece, the lower positioning plate and the foot stool; the connecting piece is installed on the lower positioning plate in a sliding mode, the upper positioning plate is installed on the connecting piece in a sliding mode, and the sliding direction of the connecting piece is perpendicular to the sliding direction of the upper positioning plate. The connecting piece is provided with at least two driving assemblies used for driving the connecting piece and the upper positioning plate to slide respectively. The centering adjusting device for the surveying and mapping instrument has the advantages of being simple in structure, high in reliability and good in applicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of surveying and mapping instruments, and particularly relates to a centering adjustment device for surveying and mapping instruments. Background Technique

[0002] Surveying and mapping instruments are instruments and devices designed and manufactured for surveying and mapping operations, including data acquisition, processing, output, etc. They are various instruments used for orientation, distance measurement, angle measurement, height measurement, mapping, and photogrammetry required in the planning, design, construction, and operation management stages of engineering construction. When surveying and mapping instruments are actually used, they need to be adjusted first to ensure the accuracy of measurement. For example, total stations, theodolites, and some measurement accessories of surveying and mapping instruments all need centering adjustment.

[0003] However, since surveying and mapping instruments generally need to be placed on a tripod for use, the tripod is used to support the surveying and mapping instrument and meet the height adjustment of the surveying and mapping instrument. When the surveying and mapping instrument is installed at the top of the tripod, if there is a deviation between the surveying and mapping instrument and the target, the surveying and mapping instrument needs to be moved and adjusted. However, if the whole tripod is moved, it is easy to cause a large deviation in position. And if the surveying and mapping instrument is disassembled and then adjusted, due to the lack of a limiting structure on the tripod, the surveying and mapping instrument may also shift when it is reinstalled and fixed, affecting the subsequent measurement accuracy of the surveying and mapping instrument. Content of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a centering adjustment device for surveying and mapping instruments to solve the problem that the centering adjustment of the surveying and mapping instrument on the existing tripod is prone to deviation, affecting the subsequent measurement accuracy of the surveying and mapping instrument.

[0005] To achieve the above object, the technical solution of the present utility model is realized as follows:

[0006] A centering adjustment device for surveying and mapping instruments includes a tripod and an adjustment platform provided on the tripod; the adjustment platform includes an upper positioning plate for installing the surveying and mapping instrument and a lower positioning plate for connecting the tripod. The upper positioning plate and the lower positioning plate are connected by a connecting member. Through holes are provided at positions corresponding to the surveying and mapping instrument on the upper positioning plate, the connecting member, the lower positioning plate, and the tripod. The connecting member is slidably installed on the lower positioning plate, and the upper positioning plate is slidably installed on the connecting member. The sliding direction of the connecting member is perpendicular to the sliding direction of the upper positioning plate. At least two driving components are provided on the connecting member for driving the sliding of the connecting member and the upper positioning plate respectively.

[0007] Further, the driving assembly includes a driving gear and a driven rack engaged with the driving gear. Driving gears are provided on the connecting member at positions corresponding to the upper positioning plate and the lower positioning plate. The driving gears are rotatably mounted on the connecting member, and driven racks engaged with the driving gears in the corresponding driving assemblies are provided on both the upper positioning plate and the lower positioning plate.

[0008] Further, the driving assembly further includes an adjusting knob for driving the driving gear to rotate.

[0009] Further, a convex portion is provided on the driven rack, and mounting grooves engaged with the convex portion are provided on both the upper positioning plate and the lower positioning plate.

[0010] Further, limiting portions are correspondingly provided at the left and right ends of the driven rack.

[0011] Further, locking assemblies are provided on the connecting member at positions corresponding to the upper positioning plate and the lower positioning plate.

[0012] Further, the locking assembly includes a fixing bolt. An upper assembly groove engaged with the upper positioning plate is provided above the connecting member, and a lower assembly groove engaged with the lower positioning plate is provided below the connecting member. Threaded holes engaged with the fixing bolt are provided on the connecting member at positions corresponding to the upper assembly groove and the lower assembly groove, and the threaded holes communicate with the corresponding upper assembly groove or lower assembly groove.

[0013] Further, the connecting member includes an upper moving plate slidably engaged with the upper positioning plate and a lower moving plate slidably engaged with the lower positioning plate, and the upper moving plate and the lower moving plate are detachably connected.

[0014] Further, a limiting member is provided on the upper positioning plate at a position corresponding to the light passing hole, and a through hole communicating with the light passing hole is provided on the limiting member.

[0015] Further, a detachable connecting sleeve is provided on the lower positioning plate at a position corresponding to the light passing hole. A lock nut is provided at one end of the connecting sleeve passing through the light passing hole on the tripod, and the other end is arranged on the lower positioning plate. A detachable washer is provided on the connecting sleeve at a position corresponding to the space between the lock nut and the tripod.

[0016] Compared with the prior art, the centering adjustment device for a surveying instrument of the present utility model has the following advantages:

[0017] (1) The centering adjustment device for a surveying instrument of the present utility model has the advantages of simple structure, high reliability, good applicability, easy installation and adjustment, high adjustment precision, and good stability after adjustment, which is beneficial to improving the measurement precision of the surveying instrument.

[0018] (2) The centering adjustment device for surveying and mapping instruments according to the present utility model can realize the relative adjustment of the horizontal positions of the upper positioning plate and the lower positioning plate by arranging a slidable adjustment connecting member between the upper positioning plate and the lower positioning plate, thereby facilitating the operator to perform centering adjustment on the surveying and mapping instruments without moving the tripod, reducing the operation difficulty of the operator, and also being beneficial to improving the centering adjustment accuracy of the surveying and mapping instruments.

[0019] (3) The centering adjustment device for surveying and mapping instruments according to the present utility model has a more compact structure and more convenient operation by arranging both the driving component and the locking component on the connecting member. This not only helps to reduce the installation difficulty of the upper positioning plate and the lower positioning plate, but also facilitates the installation and fixation of various types of surveying and mapping instruments on the upper positioning plate, improving the versatility and applicability of this centering adjustment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0021] Figure 1 is a schematic structural diagram of a centering adjustment device for surveying and mapping instruments according to an embodiment of the present utility model;

[0022] Figure 2 is a schematic structural diagram of an adjustment platform in a centering adjustment device for surveying and mapping instruments according to an embodiment of the present utility model;

[0023] Figure 3 is a schematic structural diagram of a tripod in a centering adjustment device for surveying and mapping instruments according to an embodiment of the present utility model;

[0024] Figure 4 is a schematic structural diagram of a connecting member in a centering adjustment device for surveying and mapping instruments according to an embodiment of the present utility model;

[0025] Figure 5 is a schematic structural diagram of an upper moving plate in a centering adjustment device for surveying and mapping instruments according to an embodiment of the present utility model;

[0026] Figure 6 is a schematic structural diagram of the accommodating groove on the lower moving plate in a centering adjustment device for surveying and mapping instruments according to an embodiment of the present utility model;

[0027] Figure 7 is a schematic structural diagram of an upper positioning plate in a centering adjustment device for surveying and mapping instruments according to an embodiment of the present utility model;

[0028] Figure 8Schematic diagram of the structure of the driven rack in a centering adjustment device for surveying instruments according to an embodiment of the present invention.

[0029] Explanation of reference numerals:

[0030] 1, tripod; 2, adjustment platform; 3, lower positioning plate; 4, upper positioning plate; 5, upper moving plate; 6, lower moving plate; 7, limiting member; 8, light passing hole; 9, driven rack; 10, adjustment knob; 11, connecting sleeve; 12, lock nut; 13, washer; 14, fixing bolt; 15, driving gear; 16, upper assembly groove; 17, lower assembly groove; 18, slider; 19, threaded hole; 20, shaft hole; 21, receiving groove; 22, rotating shaft; 23, lower through port; 24, through hole; 25, sliding groove; 26, limiting portion; 27, slotted opening; 28, protruding portion. Detailed implementation manners

[0031] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0032] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0033] A centering adjustment device for surveying instruments, as Figures 1 to 8 shown, includes a tripod 1 and an adjustment platform 2 provided on the tripod 1; the adjustment platform 2 includes an upper positioning plate 4 for installing a surveying instrument and a lower positioning plate 3 for connecting the tripod 1, the upper positioning plate 4 and the lower positioning plate 3 are connected by a connecting member, and light passing holes 8 are provided at positions corresponding to the surveying instrument on the upper positioning plate 4, the connecting member, the lower positioning plate 3, and the tripod 1; the connecting member is slidably installed on the lower positioning plate 3, the upper positioning plate 4 is slidably installed on the connecting member, and the sliding direction of the connecting member is perpendicular to the sliding direction of the upper positioning plate 4; at least two driving components for driving the sliding of the connecting member and the upper positioning plate 4 are provided on the connecting member.

[0034] Specifically, the tripod 1 can adopt an existing tripod, and the base of the surveying instrument can be installed and fixed on the upper positioning plate 4 by screws. Those skilled in the art can also select a suitable method to install the surveying instrument on the upper positioning plate 4 according to actual needs. It should be noted that when installing the surveying instrument, it is necessary to ensure that the laser generated by the lower centering system of the surveying instrument can pass through the light passing hole 8.

[0035] Optionally, the driving component includes a driving gear 15 which is rotatably mounted on the connecting member, and driven racks 9 that cooperate with the driving gear 15 in the corresponding driving components are provided on both the upper positioning plate 4 and the lower positioning plate 3.

[0036] Exemplarily, two driving components are correspondingly provided, so two driving gears 15 can be correspondingly provided for the upper positioning plate 4 and the lower positioning plate 3. Each driving gear 15 can be rotatably mounted on the connecting member through a rotating shaft 22, and driven racks 9 that cooperate with the driving gear 15 are fixedly mounted on both the upper positioning plate 4 and the lower positioning plate 3. By respectively providing two driving components, the separate adjustment of the connecting member and the upper positioning plate 4 can be realized, and the operation is simple. In addition, those skilled in the art can also set the driving components at appropriate positions on the connecting member according to actual needs, or set multiple groups of driving components around the connecting member to realize the driving movement of the connecting member or the upper positioning plate 4, which will not be elaborated here.

[0037] In the actual application process, scale lines can also be provided on the connecting member and the upper positioning plate 4 to facilitate the operator to more precisely move and adjust the connecting member and the upper positioning plate 4, so as to realize the precise adjustment of the surveying instrument. By adopting the meshing cooperation of the driving gear 15 and the driven rack 9, not only can the sliding adjustment accuracy of the connecting member and the upper positioning plate 4 be improved, but also the stability of the connecting member and the upper positioning plate 4 after sliding adjustment can be improved, which is beneficial to reducing the possibility of deviation error of the surveying instrument during the adjustment process.

[0038] In addition, those skilled in the art can also select appropriate driving gears 15 and driven racks 9 according to actual needs to achieve the precise cooperation between the two. For example, a driving gear 15 with a larger damping can be adopted to realize the precise sliding adjustment of the connecting member and the upper positioning plate 4 and the limit of the adjustment of the connecting member and the upper positioning plate 4, which will not be elaborated here.

[0039] Optionally, the driving component further includes an adjustment knob 10 for driving the driving gear 15 to rotate. Exemplarily, an adjustment knob 10 for driving the driving gear 15 to rotate is provided at the position corresponding to the driving gear 15 on the connecting member. The adjustment knob 10 and the driving gear 15 can be detachably connected to facilitate the assembly of the driving gear 15. In addition, those skilled in the art can also select an appropriate way to connect the driving gear 15 and the adjustment knob 10 according to actual needs to enable the adjustment knob 10 to drive the driving gear 15 to rotate, so as to realize the sliding adjustment of the driving connecting member or the upper positioning plate 4, which will not be elaborated here.

[0040] In the actual application process, in the initial state of the adjustment platform 2, the middle part of the driven rack 9 on the upper positioning plate 4 and the lower positioning plate 3 is arranged corresponding to the driving gear 15, so that when a person skilled in the art rotates the adjustment knob 10 forward and backward, the movement adjustment of the connecting piece or the upper positioning plate 4 can be conveniently realized. The horizontal and vertical movement ranges of the connecting piece and the upper positioning plate 4 are both half of the length of the driven rack 9, which is convenient for the operator to position and adjust the adjustment range of the adjustment platform 2 according to the length of the driven rack 9, and prevent the connecting piece or the upper positioning plate 4 from blocking the light passing hole 8.

[0041] Optionally, the driven rack 9 is provided with a convex portion 28, and the upper positioning plate 4 and the lower positioning plate 3 are both provided with mounting grooves that cooperate with the convex portion 28. Exemplarily, the driven rack 9 can be installed and fixed on the corresponding positioning plate by screws or adhesives. By providing mounting grooves that cooperate with the convex portion 28 on the upper positioning plate 4 and the lower positioning plate 3, it is not only beneficial to reduce the positioning and installation difficulty of the driven rack 9, but also beneficial to improve the stability of the driven rack 9 after installation and fixation, ensuring stable cooperation between the driven rack and the driving gear 15. In actual use, a person skilled in the art can set multiple convex portions 28 according to actual needs to achieve multi-point limit of the driven rack 9 to further improve the stability of the driven rack 9, which will not be elaborated here.

[0042] Optionally, locking components are arranged at the positions of the connecting piece corresponding to the upper positioning plate 4 and the lower positioning plate 3. The locking component includes a fixing bolt 14. An upper assembly groove 16 that cooperates with the upper positioning plate 4 is arranged above the connecting piece, and a lower assembly groove 17 that cooperates with the lower positioning plate 3 is arranged below the connecting piece. Threaded holes 19 that cooperate with the fixing bolt 14 are arranged at the positions of the connecting piece corresponding to the upper assembly groove 16 and the lower assembly groove 17, and the threaded holes 19 communicate with the corresponding upper assembly groove 16 or lower assembly groove 17.

[0043] Exemplarily, at least two fixing bolts 14 are arranged on the connecting piece, and the two fixing bolts 14 are respectively arranged corresponding to the upper positioning plate 4 and the lower positioning plate 3. By arranging the fixing bolt 14 on the connecting piece and using the fixing bolt 14 to press against the upper positioning plate 4 or the lower positioning plate 3, the limit of the upper positioning plate 4 or the connecting piece can be realized, preventing the surveying instrument from moving during use.

[0044] In the actual application process, when an operator needs to slide and adjust the connecting member, the operator can screw the fixing bolt 14 to use the fixing bolt 14 on the connecting member to hold against the upper positioning plate 4, thereby realizing the limit fixation of the upper positioning plate 4, which is beneficial to improving the lateral movement accuracy of the upper positioning plate 4 relative to the lower positioning plate 3 when the operator slides and adjusts the connecting member. Similarly, when the operator needs to slide and adjust the upper positioning plate 4, the operator can screw the fixing bolt 14 to use the fixing bolt 14 on the connecting member to hold against the lower positioning plate 3. After realizing the limit of the connecting member, then screw and loosen the fixing bolt 14 on one side of the upper positioning plate 4, thereby realizing the sliding adjustment of the upper positioning plate 4, which is beneficial to improving the longitudinal movement accuracy of the upper positioning plate 4 relative to the lower positioning plate 3.

[0045] By arranging both the driving assembly and the locking assembly on the connecting member, the structure is more compact and the operation is more convenient. This not only helps to reduce the installation difficulty of the upper positioning plate 4 and the lower positioning plate 3, but also facilitates the installation and fixation of various types of surveying instruments on the upper positioning plate 4, improving the versatility and applicability of this centering adjustment device.

[0046] Optionally, the connecting member includes an upper moving plate slidably engaged with the upper positioning plate and a lower moving plate slidably engaged with the lower positioning plate. The length directions of the upper moving plate and the lower moving plate are perpendicular to each other, and the upper moving plate and the lower moving plate are detachably connected.

[0047] Specifically, both the upper positioning plate 4 and the lower moving plate 6 can be made of plates with an L-shaped cross-section. During installation, the upper positioning plate 4 and the lower moving plate 6 can be spliced to form a rectangular structure. Similarly, the lower positioning plate 3 and the lower moving plate 6 can also be made of L-shaped plates. This not only helps to improve the overall structural strength of the adjustment platform 2, but also helps to further improve the stability of the upper positioning plate 4 and the connecting member during movement. In addition, those skilled in the art can also select structural members of other shapes according to actual needs, which will not be elaborated here.

[0048] In the actual application process, the upper moving plate 5 and the lower moving plate 6 can be connected by screws. Both the upper moving plate 5 and the lower moving plate 6 are provided with mounting holes for installing screws. The mounting holes can be countersunk holes to facilitate improving the compactness of the adjustment platform 2. By using a detachable connection method for the upper moving plate 5 and the lower moving plate 6, it not only helps to reduce the processing difficulty of the upper moving plate 5 and the lower moving plate 6, improve the processing accuracy of the upper moving plate 5 and the lower moving plate 6, but also facilitates the subsequent maintenance and replacement of the upper moving plate 5 and the lower moving plate 6, improving the maintainability of this centering adjustment device.

[0049] In an optional embodiment, both the upper movable plate 5 and the lower movable plate 6 are provided with a receiving groove 21 for mounting the driving gear 15, and positions corresponding to the receiving groove 21 on the upper movable plate 5 and the lower movable plate 6 are provided with an axial hole 20 for passing the rotating shaft 22 on the adjusting knob 10, and the axial hole 20 is connected with the corresponding receiving groove 21. Exemplarily, the receiving groove 21 on the upper movable plate 5 is opened toward the lower movable plate 6, and the receiving groove 21 on the lower movable plate 6 is opened toward the upper movable plate 5, and the position corresponding to the upper assembly groove 16 on the upper movable plate 5 is provided with an upper through-port for connecting the receiving groove 21 and the upper assembly groove 16, and the position corresponding to the lower assembly groove 17 on the lower movable plate 6 is provided with a lower through-port 23 for connecting the receiving groove 21 and the lower assembly groove 17, so that the driving gear 15 can extend into the upper assembly groove 16 or the lower assembly groove 17 to cooperate with the driven rack 9.

[0050] Specifically, the inner diameter of the receiving groove 21 can be slightly larger than the outer diameter of the driving gear 15, so as to facilitate the installation and rotation of the driving gear 15, and also facilitate the operator to install the adjusting knob 10, and use the adjusting knob 10 to realize the rotation installation of the driving gear 15. Among them, one end of the rotating shaft 22 can be fixed on the adjusting knob 10, and the other end is provided with a plug-in portion that cooperates with the driving gear 15, and the driving gear 15 is provided with a socket that cooperates with the plug-in portion. During installation, the driving gear 15 can be placed in the receiving groove 21 first, and then the operator can use the rotating shaft 22 on the adjusting knob 10 to realize the rotation installation of the driving gear 15 on the connecting member, and then realize the meshing cooperation between the driving gear 15 and the driven rack 9. In addition, those skilled in the art can also select a suitable method to install the driving gear 15 on the connecting member according to actual needs, so as to realize the cooperation between the driving gear 15 and the driven rack 9, and then drive the connecting member or the upper positioning plate 4 to move, which will not be repeated here.

[0051] In actual application, the operator can first place the driving gear 15 into the receiving groove 21, and then connect the upper movable plate 5 and the lower movable plate 6 to realize the assembly of the connecting piece. After that, the connecting piece is installed on the lower positioning plate 3, and the upper positioning plate 4 is installed on the connecting piece. At this time, the driving gear 15 can be received in the receiving groove 21, and will not contact the driven rack 9. The operator can conveniently assemble the connecting piece and the upper positioning plate 4. Finally, the operator can use the rotating shaft 22 on the adjustment knob 10 to pass through the shaft hole 20, and use the rotating shaft 22 to move the driving gear 15, so as to realize the alignment and plug-in fit between the rotating shaft 22 and the driving gear 15. The operation is simpler, which is conducive to realizing the convenient assembly of this centering adjustment device while ensuring the matching accuracy between the lower positioning plate 3, the connecting piece, and the upper positioning plate 4.

[0052] Optionally, both the upper positioning plate 4 and the lower positioning plate 3 are provided with a slot 27 for accommodating the driven rack 9, the above-mentioned mounting slot is connected to the slot 27, and the slot 27 is opened toward the connecting member. By arranging the driving gear 15 in the accommodating slot 21 and the driven rack 9 in the slot 27, the driving gear 15 and the driven rack 9 can be shielded and protected to avoid damage caused by the driving gear 15 and the driven rack 9 being exposed to the outside, and it is also beneficial to avoid jamming or blocking caused by foreign matter entering the driving gear 15 and the driven rack 9, which is beneficial to improve the reliability of this centering adjustment device in actual use.

[0053] Optionally, the left and right ends of the driven rack 9 are provided with corresponding limit parts 26 to limit the driving gear 15 and avoid the separation of the driving gear 15 and the driven rack 9. Specifically, during the installation process, the operator can first install and fix the driven rack 9 on the corresponding upper positioning plate 4 or lower positioning plate 3, and then install the connecting piece with the driving gear 15 but without the rotating shaft 22 on the lower positioning plate 3, and install the upper positioning plate 4 on the connecting piece. Finally, by installing the adjustment knob 10 with the rotating shaft 22, the driving gear 15 can be installed and limited by the rotating shaft 22, so that the driving gear 15 and the rack can be matched. In addition, for other installation methods of the driving gear 15, those skilled in the art can also choose a suitable method to install the driven rack 9 according to actual needs to achieve the meshing cooperation between the driven rack 9 and the driving gear 15, which will not be repeated here.

[0054] In actual application, when the operator turns the adjustment knob 10 to drive the driving gear 15 to rotate, and the rotating driving gear 15 drives the driven rack 9 to move to the limiting portion 26, the limiting portion 26 will achieve limiting by supporting the driving gear 15, preventing the driving gear 15 from separating from the driven rack 9, thereby achieving the movement limiting of the connecting member or the upper positioning plate 4. By setting the limiting portions 26 at the left and right ends of the driven rack 9, not only can the movement limiting of the connecting member and the upper positioning plate 4 be achieved, but also the blocking of the downward laser of the surveying and mapping instrument caused by over-adjustment can be prevented. It can also prevent the accidental separation between the connecting member and the lower positioning plate 3, or between the connecting member and the upper positioning plate 4, further improving the safety and reliability of this centering adjustment device when in use.

[0055] Optionally, sliders 18 are provided at positions on the connecting member corresponding to the upper positioning plate 4 and the lower positioning plate 3, and sliding grooves 25 for slidingly cooperating with the sliders 18 are provided on both the upper positioning plate 4 and the lower positioning plate 3. Exemplarily, at least two sliders 18 are provided corresponding to the upper positioning plate 4 and the lower positioning plate 3, each slider 18 is fixed on the connecting member, and the corresponding sliding grooves 25 are provided in one-to-one correspondence with the sliders 18. By the cooperation of the sliders 18 and the sliding grooves 25, the relative adjustment of the horizontal positions of the upper positioning plate 4 and the lower positioning plate 3 can be realized, so as to facilitate the operator to perform centering adjustment on the surveying instrument without moving the tripod 1, reducing the operation difficulty of the operator and also being beneficial to improving the centering adjustment accuracy of the surveying instrument.

[0056] In the actual application process, the sliding groove 25 can adopt a dovetail groove or a T-shaped groove, and the corresponding slider 18 can also adopt a trapezoidal or T-shaped structural member to realize the stable sliding cooperation between the connecting member and the upper positioning plate 4 and between the connecting member and the lower positioning plate 3, which is beneficial to improving the stability and accuracy when the connecting member and the upper positioning plate 4 move. In addition, those skilled in the art can also adopt other ways to slidably install the connecting member and the upper positioning plate 4, which will not be elaborated here.

[0057] Optionally, a limiting member 7 is provided at a position on the upper positioning plate 4 corresponding to the through hole 8, and a through hole 24 communicating with the through hole 8 is provided on the limiting member 7. Exemplarily, the limiting member 7 can be fixed on the upper positioning plate 4 or can be installed and fixed on the upper positioning plate 4 by screws. Those skilled in the art can also select other suitable ways to install the limiting member 7 according to actual needs. By providing the through hole 24 on the limiting member 7, it is convenient for the downward laser of the surveying instrument to pass through, and the limiting member 7 can also play a good role in protecting the downward laser.

[0058] Optionally, one end of the limiting member 7 can sequentially pass through the connecting member and the lower positioning plate 3, and the other end is arranged on the upper positioning plate 4, and the outer diameter of the limiting member 7 is smaller than the aperture of the through hole 8. By providing the limiting member 7, using the cooperation of the limiting member 7 and the through hole 8 on the connecting member and the lower positioning plate 3, the movement limit of the connecting member and the upper positioning plate 4 can be realized, avoiding the downward laser of the surveying instrument being blocked due to over-adjustment.

[0059] During actual use, the downward laser of the surveying instrument can sequentially pass through the through hole 24 on the limiting member 7 and the through hole 8 on the tripod 1. By sequentially passing the limiting member 7 through the connecting member and the lower positioning plate 3, combined with the provision of limiting portions 26 at both left and right ends of the driven rack 9, the double limit of the movement of the connecting member and the upper positioning plate 4 can be realized.

[0060] Optionally, a detachable connecting sleeve 11 is provided at the position of the lower positioning plate 3 corresponding to the light passing hole 8. One end of the connecting sleeve 11 passing through the light passing hole 8 on the tripod 1 is provided with a lock nut 12, and the other end is arranged on the lower positioning plate 3. A detachable washer 13 is provided at the position of the connecting sleeve 11 corresponding to the position between the lock nut 12 and the tripod 1.

[0061] Exemplarily, the connecting sleeve 11 can also be installed and fixed on the lower positioning plate 3 by screws. The washer 13 can adopt an existing anti-slip ring, such as a rubber ring, etc., to improve the stability of the connection between the connecting sleeve 11 and the lock nut 12. By adopting the detachable connecting sleeve 11, those skilled in the art can select a suitable connecting sleeve 11 for assembly according to the tripod 1, improving the versatility and applicability of the assembly of the adjustment platform 1. In addition, by using the cooperation of the connecting sleeve 11 and the lock nut 12, the convenient assembly of the adjustment platform 2 on the tripod 1 can also be realized, reducing the use and safety difficulty of this adjustment device.

[0062] In the actual application process, the limiting member 7 can also extend into the connecting sleeve 11. By using the cooperation of the limiting member 7 and the connecting sleeve 11, the movement limit of the connecting member and the upper positioning plate 4 can be realized. At the same time, the limiting member 7 and the connecting sleeve 11 can also play a good role in blocking and protecting against external interfering light, avoiding the external interfering light from affecting the downward laser of the surveying instrument.

[0063] The centering adjustment device for a surveying instrument described in this embodiment has the advantages of simple structure, high reliability, good applicability, easy installation and adjustment, high adjustment accuracy, and good stability after adjustment, which is beneficial to improving the measurement accuracy of the surveying instrument. By providing a slidable adjustment connecting member between the upper positioning plate and the lower positioning plate, the relative adjustment of the horizontal positions of the upper positioning plate and the lower positioning plate can be realized, thus facilitating the operator to perform centering adjustment on the surveying instrument without moving the tripod, reducing the operation difficulty of the operator, and also being beneficial to improving the centering adjustment accuracy of the surveying instrument. In addition, by arranging both the driving component and the locking component on the connecting member, the structure is more compact and the operation is more convenient. This is not only beneficial to reducing the installation difficulty of the upper positioning plate and the lower positioning plate, but also convenient for installing and fixing various types of surveying instruments on the upper positioning plate, improving the versatility and applicability of this centering adjustment device.

[0064] Note that the above is only the preferred embodiment of the present utility model and the applied technical principles. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in detail through the above embodiments, the present utility model is not limited to the above embodiments. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.

Claims

1. A centering adjustment device for a surveying instrument, characterized in that: It includes a tripod (1) and an adjustment platform (2) provided on the tripod (1); the adjustment platform (2) includes an upper positioning plate (4) for installing surveying and mapping instruments and a lower positioning plate (3) for connecting the tripod (1). The upper positioning plate (4) and the lower positioning plate (3) are connected by a connecting member. Through holes (8) are provided at the positions corresponding to the surveying and mapping instruments on the upper positioning plate (4), the connecting member, the lower positioning plate (3), and the tripod (1). The connecting member is slidably installed on the lower positioning plate (3), and the upper positioning plate (4) is slidably installed on the connecting member. The sliding direction of the connecting member is perpendicular to the sliding direction of the upper positioning plate (4). At least two driving components are provided on the connecting member for driving the sliding of the connecting member and the upper positioning plate (4) respectively. The connecting member includes an upper moving plate (5) slidably engaged with the upper positioning plate (4) and a lower moving plate (6) slidably engaged with the lower positioning plate (3). The upper moving plate (5) and the lower moving plate (6) are detachably connected.

2. The centering and adjusting device for a surveying instrument according to claim 1, wherein: The driving component includes a driving gear (15). The driving gear (15) is rotatably installed on the connecting member. Driven racks (9) are provided on both the upper positioning plate (4) and the lower positioning plate (3) and are engaged with the driving gear (15) in the corresponding driving components.

3. The centering adjustment device for a surveying instrument according to claim 2, characterized in that: The driving component further includes an adjustment knob (10) for driving the driving gear (15) to rotate.

4. The centering and adjusting device for a surveying instrument according to claim 2, characterized in that: A protruding portion (28) is provided on the driven rack (9). Installation grooves for cooperating with the protruding portion (28) are provided on both the upper positioning plate (4) and the lower positioning plate (3).

5. The centering and adjusting device for a surveying instrument according to claim 2, characterized in that: Limiting portions (26) are correspondingly provided at the left and right ends of the driven rack (9).

6. The centering adjustment device for a surveying instrument according to claim 1, characterized in that: Locking components are provided on the connecting member at the positions corresponding to the upper positioning plate (4) and the lower positioning plate (3).

7. The centering adjustment device for a surveying instrument according to claim 6, characterized in that: The locking component includes a fixing bolt (14). An upper assembly groove (16) for cooperating with the upper positioning plate (4) is provided above the connecting member, and a lower assembly groove (17) for cooperating with the lower positioning plate (3) is provided below the connecting member. Threaded holes (19) for cooperating with the fixing bolt (14) are provided on the connecting member at the positions corresponding to the upper assembly groove (16) and the lower assembly groove (17). The threaded holes (19) communicate with the corresponding upper assembly groove (16) or lower assembly groove (17).

8. A centering and adjusting device for a surveying instrument according to claim 1, characterized in that: A limiting member (7) is provided on the upper positioning plate (4) at the position corresponding to the through hole (8). A through hole (24) communicating with the through hole (8) is provided on the limiting member (7).

9. The centering adjustment device for a surveying instrument according to claim 1 or 8, characterized in that: A detachable connecting sleeve (11) is provided on the lower positioning plate (3) at the position corresponding to the through hole (8). A lock nut (12) is provided at one end of the connecting sleeve (11) passing through the through hole (8) on the tripod (1), and the other end is provided on the lower positioning plate (3). A detachable washer (13) is provided on the connecting sleeve (11) at the position corresponding to the space between the lock nut (12) and the tripod (1).

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