A measuring auxiliary tool for road and bridge construction

Abstract

The utility model provides a kind of measuring auxiliary tool for road and bridge construction, it is related to road and bridge construction technical field.The tool includes mounting seat and telescopic support leg, telescopic support leg includes fixed support, first telescopic support and second telescopic support, one end of fixed support is hinged to mounting seat, first telescopic support includes first support seat, first sliding plate, gear, rack, pivot and first locking structure;First support seat is fixed with fixed support, first sliding plate is connected with first support seat slidingly, pivot is rotatably connected with first support seat, and pivot is coaxially fixed with gear, rack is fixed on first sliding plate, rack is engaged with gear, first locking structure is used to lock first sliding plate and first support seat each other;One end of second telescopic support is fixed with first sliding plate.The telescopic support leg can be first quickly coarse adjustment, then realize fine adjustment, can make telescopic support leg reach the telescopic length required, and efficiency is high, need not repeatedly adjust.

Description

Technical Field

[0001] This utility model relates to the field of road and bridge construction technology, and more specifically, to a measurement auxiliary tool for road and bridge construction. Background Technology

[0002] Roads and bridges generally consist of several major parts, including roadbed, pavement, bridges, tunnels, and traffic engineering facilities. Road and bridge construction is a complex process, usually requiring prior surveying. Surveying instruments such as levels, theodolites, and total stations are used during this process. To facilitate surveying, auxiliary tools, primarily supports, are typically used. Currently, existing surveying auxiliary tools usually include a mounting base for fixing the measuring instruments and multiple telescopic legs located on the bottom of the mounting base. These telescopic legs can open or close relative to the mounting base and can also extend or retract. Therefore, the telescopic function of the legs and their rotation relative to the mounting base are crucial, as they are essential for ensuring the leveling of the mounting base and the measuring instruments on it. However, in the current surveying auxiliary tools, when the telescopic legs participate in the leveling of the mounting base through extension and retraction, workers often rely on experience to adjust the extension of each leg. Sometimes the legs are adjusted too long, and sometimes too short, leading to repeated adjustments and wasted time. Utility Model Content

[0003] The present invention aims to at least solve the problem that workers often rely on experience to adjust the extension of each telescopic outrigger, sometimes adjusting the outrigger too long and sometimes too short, resulting in repeated adjustments and wasted time.

[0004] To solve the above problems, this utility model provides a surveying auxiliary tool for road and bridge construction, including a mounting base and telescopic legs. The telescopic legs include a fixed bracket, a primary telescopic bracket and a secondary telescopic bracket. One end of the fixed bracket is hinged to the mounting base. The primary telescopic bracket includes a first support base, a first sliding plate, a gear, a rack, a rotating shaft and a first locking structure. The first support base is fixed to the fixed bracket, the first slide plate is slidably connected to the first support base, the rotating shaft is rotatably connected to the first support base, and the rotating shaft is coaxially fixed to the gear. The rack is fixed to the first slide plate, the rack meshes with the gear, and the length direction of the rack is consistent with the sliding direction of the first slide plate. The first locking structure is used to lock or unlock the first slide plate and the first support base. One end of the secondary telescopic bracket is fixed to the end of the first slide plate located outside the first slide groove, and the secondary telescopic bracket is used to extend or shorten to a set length.

[0005] This utility model provides a surveying auxiliary tool for road and bridge construction, which, compared with the prior art, has, but is not limited to, the following technical effects: The telescopic outrigger, which participates in the leveling process of the mounting base by extending or shortening, differs from existing technologies in that the operator can first use experience to extend the secondary telescopic bracket to achieve the approximate length requirement of the overall telescopic outrigger, which can be referred to as a coarse adjustment of the overall length of the telescopic outrigger. Then, the rotating shaft can be rotated relative to the first support base to drive the gear fixed coaxially thereto to rotate synchronously. With the gear and rack meshing, the rotation of the gear will drive the rack to move, thereby achieving fine adjustment of the first slide plate relative to the first support base, and thus achieving micro- and fine-tuning of the telescopic support. Therefore, compared with existing telescopic outriggers, the telescopic outrigger of this application can achieve rapid coarse adjustment first, followed by micro- and fine-tuning, when adjusting the length. This allows the telescopic outrigger to reach the required telescopic length efficiently, without repeated adjustments, saving time.

[0006] Furthermore, multiple telescopic outriggers are provided, and the multiple telescopic outriggers are arranged in a ring. The fixing bracket of each telescopic outrigger is hinged to the mounting base. The mounting base is provided with a through-hole for emitting light. The top of the mounting base is used to fix the measuring instrument, and the measuring instrument is used to emit light downward through the emitting hole.

[0007] Furthermore, it also includes an opening and closing assembly, which is connected to the mounting base and the fixing bracket of each of the telescopic legs respectively. The opening and closing assembly is used to link the telescopic legs together so that the opening and closing angles of the telescopic legs are consistent. In addition, the opening and closing assembly is provided with a channel for the light to pass through.

[0008] Furthermore, the opening and closing assembly includes a guide cylinder, a sleeve, and connecting rods. The guide cylinder is fixed to the bottom of the mounting base and is coaxial with the light-emitting hole. The internal channel of the guide cylinder serves as a channel for the light to pass through. The sleeve is slidably sleeved on the guide cylinder. One end of each of the multiple connecting rods is respectively hinged to different circumferential positions of the sleeve, and the other end of each of the multiple connecting rods is correspondingly hinged to the fixed brackets of the multiple telescopic legs.

[0009] Furthermore, one end of the first support base is fixedly connected to the end of the fixed bracket away from the mounting base, and the other end of the first support base is provided with a first sliding groove. One end of the rotating shaft is located outside the first support base, and the other end of the rotating shaft is located inside the first sliding groove. The gear is located inside the first sliding groove, and the first sliding plate is movably inserted into the first sliding groove. The first sliding plate is provided with an elongated hole, and the rack is fixed to the side wall of the elongated hole.

[0010] Furthermore, the first locking structure includes a turntable and a threaded adjusting shaft. The turntable is coaxially fixedly sleeved on the portion of the rotating shaft located outside the first support base. The turntable is provided with an eccentric threaded hole. The threaded adjusting shaft is threadedly connected to the eccentric threaded hole. The threaded adjusting shaft is used to screw relative to the eccentric threaded hole to press and fix it on the first support base.

[0011] Furthermore, the first locking structure also includes a rotating drum and an anti-detachment block, wherein the rotating drum is sleeved on the threaded adjusting shaft, and the anti-detachment block is fixed on the threaded adjusting shaft to prevent the rotating drum from falling off the threaded adjusting shaft; and / or, the turntable is provided with a weight reduction hole.

[0012] Furthermore, the secondary telescopic bracket includes a second support base, a second sliding plate, and a second locking structure. One end of the second support base is fixed to the first sliding plate, the second sliding plate is slidably connected to the second support base, and the second locking structure is used to lock or unlock the second sliding plate and the second support base to each other.

[0013] Furthermore, the second locking structure includes a locking bolt, a second groove is provided at the end of the second support base away from the second slide plate, the second slide plate is movably inserted into the second groove, a second threaded hole is provided on the second support base, the locking bolt is threadedly connected to the second threaded hole, and the locking bolt is used to screw into the second threaded hole to press and fix it at the slide plate.

[0014] Furthermore, the telescopic outrigger also includes a sliding sleeve, a pedal, and a positioning foot. The positioning foot is fixed to the bottom end of the second slide plate, and the bottom end of the positioning foot has a pointed cone structure. The sliding sleeve is slidably fitted onto the second slide plate, and the pedal is fixed to the sliding sleeve. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a surveying auxiliary tool for road and bridge construction according to an embodiment of the present utility model; Figure 2 This is a bottom view of the measuring auxiliary tool for road and bridge construction according to an embodiment of the present utility model. Figure 3 This is a schematic diagram of the meshing state of the gear and rack in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Mounting base; 2. Fixed bracket; 3. First support base; 4. First slide plate; 5. Turntable; 6. Weight reduction hole; 7. Threaded adjustment shaft; 8. Rotary cylinder; 9. Elongated hole; 10. Rack; 11. Rotary shaft; 12. Gear; 13. Second support base; 14. Second slide plate; 15. Locking bolt; 16. Sliding sleeve; 17. Pedal; 18. Positioning foot; 19. Guide cylinder; 20. Sleeve; 21. Connecting rod; 22. Anti-detachment block. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0018] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0022] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0023] See Figures 1-3 A measurement auxiliary tool for road and bridge construction (hereinafter referred to as the measurement auxiliary tool) according to an embodiment of the present invention includes a mounting base 1 and a telescopic support leg. The telescopic support leg includes a fixed bracket 2, a primary telescopic bracket and a secondary telescopic bracket. One end of the fixed bracket 2 is hinged to the mounting base 1. The primary telescopic bracket includes a first support base 3, a first sliding plate 4, a gear 12, a rack 10, a rotating shaft 11 and a first locking structure. The first support base 3 is fixed to the fixed bracket 2, the first slide plate 4 is slidably connected to the first support base 3, the rotating shaft 11 is rotatably connected to the first support base 3, and the rotating shaft 11 is coaxially fixed to the gear 12. The rack 10 is fixed to the first slide plate 4, the rack 10 meshes with the gear 12, the length direction of the rack 10 is consistent with the sliding direction of the first slide plate 4, and the first locking structure is used to lock or unlock the first slide plate 4 and the first support base 3. One end of the secondary telescopic bracket is fixed to the end of the first slide plate 4 located outside the first slide groove, and the secondary telescopic bracket is used to extend or shorten to a set length.

[0024] In this embodiment, the telescopic outrigger, by extending or shortening, participates in the leveling process of the mounting base 1. The difference from existing technologies lies at least in that the operator can first use experience to extend the secondary telescopic bracket to achieve the approximate length requirement of the telescopic outrigger, which can be referred to as a coarse adjustment of the overall length of the telescopic outrigger. Then, the rotating shaft 11 can be rotated relative to the first support base 3 to drive the gear 12, which is coaxially fixed with it, to rotate synchronously. With the gear 12 meshing with the rack 10, the rotation of the gear 12 will drive the rack 10 to move, thereby achieving fine adjustment of the first sliding plate 4 relative to the first support base 3, and thus achieving micro- and fine-tuning of the telescopic support. It is evident that, compared to existing telescopic outriggers, the telescopic outrigger of this application can achieve rapid coarse adjustment first, followed by micro- and fine-tuning, enabling the telescopic outrigger to reach the required telescopic length with high efficiency, eliminating the need for repeated adjustments, and saving time.

[0025] See Figure 1-3 Optionally, multiple telescopic legs are provided, and the multiple telescopic legs are arranged in a ring. The fixing bracket 2 of each telescopic leg is hinged to the mounting base 1. The mounting base 1 is provided with a through-hole for emitting light. The top of the mounting base 1 is used to fix the measuring instrument, and the measuring instrument is used to emit light downward through the emitting hole.

[0026] In this embodiment, multiple telescopic outriggers, such as three telescopic outriggers, are arranged in a ring on the lower side of the mounting base 1. Utilizing the stability of a triangle, this ensures that the entire measuring aid can stand stably on the setup point. Specifically, when using this measuring aid, the measuring instrument can first be fixedly mounted on the mounting base 1. Then, by extending or shortening the secondary telescopic support, the mounting base 1 can be aligned with the operator's chest. At this time, the length of the second telescopic support after rough adjustment is maintained at a fixed position. Rotate each telescopic outrigger relative to the mounting base 1 to adjust the opening and closing angles between the multiple telescopic outriggers. Use the infrared light emitted by the measuring instrument to roughly locate the marked point on the mounting point, and press the bottom of each telescopic outrigger firmly onto the mounting point to maintain stability, thus completing the coarse leveling of the mounting base 1. After the coarse leveling is completed, rotate the rotating shaft 11, and then make fine adjustments to the mounting base 1 by different or the same length through each primary telescopic bracket to achieve fine leveling. Finally, make the infrared light emitted by the measuring instrument pass through the light-emitting hole and hit the marked point on the mounting point. Then, lock the length of the primary telescopic bracket through the first locking structure, thus completing the setup of the measuring auxiliary tool.

[0027] See Figure 1-3Optionally, the measuring aid also includes an opening and closing assembly, which is connected to the mounting base 1 and the fixing bracket 2 of each of the telescopic legs. The opening and closing assembly is used to link the telescopic legs together so that the opening and closing angles of the telescopic legs are consistent. Furthermore, the opening and closing assembly is provided with a channel for the light to pass through.

[0028] In this embodiment, the opening and closing assembly is located at the bottom of the mounting base 1. It links all the telescopic legs together, ensuring that each leg opens and closes synchronously, guaranteeing that the opening and closing angles of all legs are the same. This improves the efficiency and stability of the measurement auxiliary tool's setup. It is understood that the opening and closing assembly should not affect the downward emission of infrared light from the measuring instrument at the top of the mounting base 1. Specifically, the opening and closing assembly has an internal channel for the infrared light to pass through.

[0029] In this embodiment, during the setup of the measurement auxiliary tool, the operator can hold two telescopic legs with both hands respectively, causing these two telescopic legs to rotate outward and open. With the linkage of the opening and closing components, the remaining telescopic legs will also rotate outward and open synchronously, ultimately improving the setup efficiency.

[0030] See Figure 1-2 Optionally, the opening and closing assembly includes a guide cylinder 19, a sleeve 20, and connecting rods 21. The guide cylinder 19 is fixed to the bottom of the mounting base 1 and is coaxial with the light-emitting hole. The internal channel of the guide cylinder 19 serves as a channel for the light to pass through. The sleeve 20 is slidably sleeved on the guide cylinder 19. One end of each of the multiple connecting rods 21 is respectively hinged to different circumferential positions of the sleeve 20, and the other end of each of the multiple connecting rods 21 is correspondingly hinged to the fixed brackets 2 of the multiple telescopic legs.

[0031] In this embodiment, during the setup of the measuring auxiliary tool, the operator can hold two telescopic outriggers with both hands, causing them to rotate outwards to open. During this process, the rotation of these two outriggers pulls the corresponding connecting rod 21 to rotate. The connecting rod 21 then pulls the sleeve 20 to slide on the guide cylinder 19. The sliding of the guide cylinder 19 pulls the remaining connecting rods 21 to rotate, and the telescopic outriggers hinged to the remaining connecting rods 21 also rotate synchronously, thus ensuring that the opening and closing angles of all telescopic outriggers are the same, ensuring the stability of the auxiliary setup. Furthermore, this opening and closing assembly, while achieving the above functions, only requires the guide cylinder 19, sleeve 20, and connecting rods 21, resulting in a simple and reliable structure that does not occupy much space.

[0032] It is understandable that, since the guide tube 19 is a cylindrical structure, the channel inside it is the same channel within the opening and closing assembly used to allow the aforementioned infrared light to pass through.

[0033] See Figure 1 and Figure 3 Optionally, one end of the first support base 3 is fixedly connected to the end of the fixed bracket 2 away from the mounting base 1, and the other end of the first support base 3 is provided with a first sliding groove. One end of the rotating shaft 11 is located outside the first support base 3, and the other end of the rotating shaft 11 is located inside the first sliding groove. The gear 12 is located inside the first sliding groove, and the first slide plate 4 is movably inserted into the first sliding groove. The first slide plate 4 is provided with an elongated hole 9, and the rack 10 is fixed to the side wall of the elongated hole 9.

[0034] In this embodiment, the first support base 3 has a first groove at the end away from the fixed bracket 2. The overall cross-sectional dimensions of the first slide plate 4 match the first groove, enabling the first slide plate 4 to slide stably within the first groove without requiring additional guide structures. This also improves the integration of the two components in the thickness direction. One end of the rotating shaft 11 is inserted into the first groove along the thickness direction of the first support base 3, while the other end of the rotating shaft 11 is located outside the first support base 3. The first support base 3 provides support for the rotation of the rotating shaft 11. The gear 12 is located within the first groove and coaxially fixed to the rotating shaft 11. The gear 12 is not exposed, resulting in high overall integration and providing protection for the gear 12. The first slide plate 4 has an elongated hole 9, and a rack 10 is fixed to one side wall of this hole, ensuring that the rack 10 does not occupy additional space and further improving integration.

[0035] See Figure 1 Optionally, the first locking structure includes a turntable 5 and a threaded adjusting shaft 7. The turntable 5 is coaxially fixedly sleeved on the portion of the rotating shaft 11 located outside the first support base 3. The turntable 5 is provided with an eccentric threaded hole. The threaded adjusting shaft 7 is threadedly connected to the eccentric threaded hole. The threaded adjusting shaft 7 is used to screw relative to the eccentric threaded hole to press and fix it on the first support base 3.

[0036] In this embodiment, when it is necessary to fine-tune the length of the first-stage telescopic bracket, the threaded adjustment shaft 7 can be held, and then the turntable 5 and the rotating shaft 11 can be rotated, which in turn drives the gear 12 in the first slide groove to rotate. After the gear 12 rotates, it drives the rack 10 and the first sliding plate 4 to move, thereby realizing the fine-tuning of the first-stage telescopic bracket. After fine-tuning, the threaded adjustment shaft 7 can be screwed in to press the threaded adjustment shaft 7 against the surface of the first support seat 3, thereby locking the length of the first-stage telescopic bracket after fine-tuning.

[0037] See Figure 1Optionally, the first locking structure further includes a rotating drum 8 and an anti-detachment block 22. The rotating drum 8 is sleeved on the threaded adjusting shaft 7, and the anti-detachment block 22 is fixed on the threaded adjusting shaft 7 to prevent the rotating drum 8 from falling off the threaded adjusting shaft 7; and / or, the turntable 5 is provided with a weight reduction hole 6.

[0038] In this embodiment, since the threaded surface of the threaded adjusting shaft 7 is threaded and difficult to grip, the rotating drum 8 can be sleeved on the threaded adjusting shaft 7. By gripping the rotating drum 8, the turntable 5 and the rotating shaft 11 can be rotated. To prevent the rotating drum 8 from slipping off the threaded adjusting shaft 7, an anti-slip block 22 is fixedly provided at the end of the threaded adjusting shaft 7 away from the turntable 5. In addition, the turntable 5 is provided with weight-reducing holes 6 to reduce the weight of the turntable 5 and reduce the difficulty of manually rotating the turntable 5.

[0039] See Figure 1 Optionally, the secondary telescopic bracket includes a second support base 13, a second slide plate 14, and a second locking structure. One end of the second support base 13 is fixed to the first slide plate 4, the second slide plate 14 is slidably connected to the second support base 13, and the second locking structure is used to lock or unlock the second slide plate 14 and the second support base 13.

[0040] In this embodiment, the secondary telescopic bracket is a unit used for coarse adjustment of the telescopic outrigger. After the second locking structure unlocks the second sliding plate 14 from the second support base 13, the second sliding plate 14 can slide relative to the second support base 13 at an unlimited speed, enabling rapid coarse adjustment of the telescopic outrigger length. After coarse adjustment, the second locking structure then locks the second sliding plate 14 to the second support base 13.

[0041] See Figure 1 Optionally, the second locking structure includes a locking bolt 15, a second groove is provided at one end of the second support base 13 away from the second slide plate 14, the second slide plate 14 is movably inserted into the second groove, a second threaded hole is provided on the second support base 13, the locking bolt 15 is threadedly connected to the second threaded hole, and the locking bolt 15 is used to screw into the second threaded hole to press and fix it at the slide plate.

[0042] In this embodiment, the second support base 13 has a second sliding groove at the end away from the first-stage telescopic bracket. The overall cross-sectional dimensions of the second sliding plate 14 match the second sliding groove, enabling the second sliding plate 14 to slide stably within the second sliding groove without requiring additional guide structures. This also improves the integration of the two components in the thickness direction. Furthermore, the second locking structure includes a locking bolt 15, which can be screwed into the second sliding groove to press against the second sliding plate 14, thus locking the second sliding plate 14 to the second support base 13.

[0043] See Figure 1 Optionally, the telescopic outrigger further includes a sliding sleeve 16, a pedal 17, and a positioning foot 18. The positioning foot 18 is fixed to the bottom end of the second slide plate 14, and the bottom end of the positioning foot 18 has a pointed cone structure. The sliding sleeve 16 is slidably sleeved on the second slide plate 14, and the pedal 17 is fixed on the sliding sleeve 16.

[0044] In this embodiment, in order to improve the stability of the telescopic outrigger standing at the erection point, the pedal 17 on the sliding sleeve 16 can be stepped on to transmit the stepping force to the positioning foot 18 at the bottom of the second sliding plate 14. The pointed cone structure of the positioning foot 18 presses firmly onto the surface of the erection point, which is beneficial to stability.

[0045] In summary, the above-mentioned measuring auxiliary tool can be used as follows: When in use, fix the measuring instrument on the mounting base 1, rotate the locking bolts 15 on each of the second support seats 13 in the opposite direction to ensure that each second slide plate 14 can slide smoothly on its corresponding second support seat 13. Pull the mounting base 1 to chest level with the operator. At this time, rotate the locking bolts 15 to lock and fix the second slide plate 14. Hold the fixed brackets 2 of two adjacent telescopic outriggers with both hands. Under the linkage of the opening and closing components, each fixed bracket 2 rotates synchronously on the mounting base 1. By roughly locating the mark on the erection point using infrared light, stepping on pedal 17 causes the positioning foot 18 to press firmly onto the surface of the erection point. By readjusting the length of each secondary telescopic bracket, the mounting base 1 is coarsely leveled. After coarse leveling, the locking bolt 15 is tightened. Then, the rotating drum 8 is shaken to finely adjust the length of the primary telescopic bracket, thereby achieving fine leveling of the mounting base 1. The infrared light emitted from the measuring instrument passes through the light-emitting hole and the guide cylinder 19 and hits the mark on the erection point. Then, the threaded adjustment shaft 7 is rotated to keep the turntable 5 stationary, thus completing the erection of the auxiliary tool.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include at least one of those features.

[0047] Although the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A surveying auxiliary tool for road and bridge construction, characterized in that, The system includes a mounting base (1) and telescopic legs. The telescopic legs include a fixed bracket (2), a primary telescopic bracket, and a secondary telescopic bracket. One end of the fixed bracket (2) is hinged to the mounting base (1). The primary telescopic bracket includes a first support base (3), a first sliding plate (4), a gear (12), a rack (10), a rotating shaft (11), and a first locking structure. The first support base (3) is fixed to the fixed bracket (2), the first sliding plate (4) is slidably connected to the first support base (3), and the rotating shaft (11) is connected to the first support base (3). The first sliding plate (4) is rotatably connected, and the rotating shaft (11) is coaxially fixed with the gear (12). The rack (10) is fixed on the first sliding plate (4), and the rack (10) meshes with the gear (12). The length direction of the rack (10) is consistent with the sliding direction of the first sliding plate (4). The first locking structure is used to lock or unlock the first sliding plate (4) and the first support base (3). One end of the secondary telescopic bracket is fixed to the end of the first sliding plate (4) located outside the first slide groove, and the secondary telescopic bracket is used to extend or retract. The length is set to a minimum; one end of the first support base (3) is fixedly connected to the end of the fixed bracket (2) away from the mounting base (1), and the other end of the first support base (3) is provided with a first sliding groove. One end of the rotating shaft (11) is located outside the first support base (3), and the other end of the rotating shaft (11) is located inside the first sliding groove. The gear (12) is located inside the first sliding groove, and the first sliding plate (4) is movably inserted into the first sliding groove. The overall cross-sectional dimensions of the first sliding plate (4) match those of the first sliding groove. The slide plate (4) has an elongated hole (9), and the rack (10) is fixed to the side wall of the elongated hole (9). The first locking structure includes a turntable (5) and a threaded adjusting shaft (7). The turntable (5) is coaxially fixed on the part of the rotating shaft (11) located outside the first support base (3). The turntable (5) has an eccentric threaded hole, and the threaded adjusting shaft (7) is threaded to the eccentric threaded hole. The threaded adjusting shaft (7) is used to screw relative to the eccentric threaded hole to press and fix it on the first support base (3).

2. The surveying auxiliary tool for road and bridge construction according to claim 1, characterized in that, The telescopic outriggers are provided in multiple ways, and the multiple telescopic outriggers are arranged in a ring. The fixing bracket (2) of each telescopic outrigger is hinged to the mounting base (1). The mounting base (1) is provided with a through-hole for emitting light. The top of the mounting base (1) is used to fix the measuring instrument. The measuring instrument is used to emit light downward through the emitting hole.

3. The surveying auxiliary tool for road and bridge construction according to claim 2, characterized in that, It also includes an opening and closing assembly, which is connected to the mounting base (1) and the fixing bracket (2) of each of the telescopic legs respectively. The opening and closing assembly is used to link each of the telescopic legs so that the opening and closing angles of each of the telescopic legs are consistent. In addition, the opening and closing assembly is provided with a channel for the light to pass through.

4. The surveying auxiliary tool for road and bridge construction according to claim 3, characterized in that, The opening and closing assembly includes a guide cylinder (19), a sleeve (20), and connecting rods (21). The guide cylinder (19) is fixed to the bottom of the mounting base (1) and is coaxial with the light-emitting hole. The internal channel of the guide cylinder (19) serves as a channel for the light to pass through. The sleeve (20) is slidably sleeved on the guide cylinder (19). One end of each of the multiple connecting rods (21) is respectively hinged to different circumferential positions of the sleeve (20), and the other end of each of the multiple connecting rods (21) is correspondingly hinged to the fixed brackets (2) of the multiple telescopic legs.

5. The surveying auxiliary tool for road and bridge construction according to claim 1, characterized in that, The first locking structure further includes a rotating drum (8) and an anti-detachment block (22). The rotating drum (8) is sleeved on the threaded adjusting shaft (7), and the anti-detachment block (22) is fixed on the threaded adjusting shaft (7) to restrict the rotating drum (8) from falling off the threaded adjusting shaft (7); and / or, the turntable (5) is provided with a weight reduction hole (6).

6. The surveying auxiliary tool for road and bridge construction according to claim 1, characterized in that, The secondary telescopic bracket includes a second support base (13), a second sliding plate (14), and a second locking structure. One end of the second support base (13) is fixed to the first sliding plate (4). The second sliding plate (14) is slidably connected to the second support base (13). The second locking structure is used to lock or unlock the second sliding plate (14) and the second support base (13).

7. The surveying auxiliary tool for road and bridge construction according to claim 6, characterized in that, The second locking structure includes a locking bolt (15), a second groove is provided at one end of the second support base (13) away from the second slide plate (14), the second slide plate (14) is movably inserted into the second groove, a second threaded hole is provided on the second support base (13), the locking bolt (15) is threaded into the second threaded hole, and the locking bolt (15) is used to screw into the second threaded hole to press and fix it at the slide plate.

8. The surveying auxiliary tool for road and bridge construction according to claim 6, characterized in that, The telescopic outrigger also includes a sliding sleeve (16), a pedal (17), and a positioning foot (18). The positioning foot (18) is fixed to the bottom end of the second slide plate (14). The bottom end of the positioning foot (18) is a pointed cone structure. The sliding sleeve (16) is slidably sleeved on the second slide plate (14). The pedal (17) is fixed on the sliding sleeve (16).

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