An automated roadbed leveling point device

Abstract

The application discloses an automatic roadbed leveling measuring point device, which comprises a measuring point pre-buried box and a turnover mechanism; the measuring point pre-buried box comprises a box body and a flip cover; the turnover mechanism comprises a connected driving assembly, a first rotating rod, a transmission assembly, a flip cover assembly and a turnover assembly with a scale; the driving assembly is connected with the first rotating rod and the transmission assembly and drives the first rotating rod and the transmission assembly to move; the first rotating rod rotates and drives the flip cover assembly to move along the first rotating rod to open or close the flip cover; the first rotating rod rotates and drives the turnover assembly to rotate to make the scale move along a preset track to change the posture and realize the vertical or upside-down arrangement of the scale. The automatic roadbed leveling measuring point device disclosed by the application can realize the opening and closing of the flip cover by controlling the driving assembly, and simultaneously realize the automatic vertical and upside-down arrangement of the scale; the scale is vertical when the flip cover is opened, and the scale is stored in the box body when the flip cover is closed, so that the structure is flexible.

Description

Technical Field

[0001] This invention relates to the field of roadbed measurement technology, and in particular to an automated roadbed leveling device. Background Technology

[0002] Leveling, also known as geometric leveling, is a method of determining the elevation difference between two points on the ground using a level instrument and a leveling rod. The level instrument is set up between two points on the ground, and the leveling rods erected at the two points are observed. The elevation difference between the two points is calculated based on the readings on the leveling rods. Typically, the elevation is determined station by station along a selected leveling route, starting from the leveling origin or any known elevation point.

[0003] Roadbed settlement monitoring is a necessary procedure before pavement construction. However, when leveling points are installed, those located in the center of the roadbed are easily damaged by construction vehicles. Therefore, monitoring points are usually only installed at the shoulders, resulting in a lack of representative monitoring points in the center of the roadbed and making it difficult to establish a settlement cross-section in the center. Moreover, existing methods simply involve pre-embedding foundation components at the shoulders, which have a simple structure and poor measurement flexibility.

[0004] Therefore, it is necessary to propose an automated roadbed leveling point measuring device to solve the above-mentioned defects. Summary of the Invention

[0005] The main objective of this invention is to provide an automated roadbed leveling point measuring device, which aims to solve the problems of existing devices that set observation points on the road shoulder to avoid damage by vehicles, making it impossible to establish intermediate prediction points for the roadbed, and the poor flexibility of measuring foundation embedded parts.

[0006] To achieve the above objectives, the present invention provides an automated roadbed leveling point measuring device, including a measuring point pre-embedded box and a flipping mechanism;

[0007] The measuring point pre-embedded box includes a box body with a receiving space and a flip cover that is rotatably connected to the box body and can be opened and closed.

[0008] The flipping mechanism is housed in the box, and the flipping mechanism includes a connected drive assembly, a first rotating rod, a transmission assembly, a flip cover assembly, and a flipping assembly with a scale.

[0009] The driving assembly is connected with the first rotating rod and the transmission assembly and simultaneously drives the first rotating rod and the transmission assembly to move, the flip cover is in transmission connection with the first rotating rod through the flip cover assembly, the first rotating rod rotates to drive the flip cover assembly to move along the first rotating rod to open or close the flip cover, the turnover assembly is in transmission connection with the first rotating rod through the transmission assembly, the first rotating rod rotates to drive the turnover assembly to move along a preset track to rotate the ruler arranged thereon to change the posture and realize vertical or upside-down arrangement of the ruler.

[0010] Preferably, the flip cover assembly comprises a sliding block sleeved on the first rotating rod and a connecting rod mechanism rotatably connected at one end to the sliding block and at the other end to the flip cover, the first rotating rod rotates, the sliding block moves transversely along the first rotating rod, and the connecting rod mechanism drives the flip cover to overturn.

[0011] Preferably, the turnover assembly comprises a bearing seat, a second rotating rod, an elastic member and a sleeve provided with a sliding groove, the bearing seat is fixed in the box body, the sleeve is supported and fixed on the bearing seat, the ruler is in sliding connection with the second rotating rod and is limited in the sliding groove, the second rotating rod rotates, the ruler slides along the sliding groove to change the posture, the elastic member is axially sleeved outside the second rotating rod and is axially installed in the sleeve, one end of the elastic member abuts against the ruler and the other end abuts against the bearing seat, and the elastic member drives the ruler to make a reset movement by a rebound force under compression.

[0012] Preferably, the sliding groove penetrates the inner and outer surfaces of the sleeve, the sliding groove is provided along the axial direction of the sleeve, the sliding groove comprises an upper horizontal section, a lower horizontal section and a lifting section connecting the upper horizontal section and the lower horizontal section, the ruler moves in the sliding groove and changes the posture along with the movement trajectories of the horizontal section, the lifting section and the lower horizontal section.

[0013] Preferably, the elastic member is a spring.

[0014] Preferably, the driving assembly comprises a driver, a transmission belt and a rotating wheel, the driver is fixed in the box body, the rotating wheel is installed on the first rotating rod, and the driver drives the first rotating rod to rotate through the transmission belt.

[0015] Preferably, the transmission assembly comprises a large pulley, a small pulley and a synchronous belt wound on the large pulley and the small pulley, the small pulley is installed on the first rotating rod, and the large pulley is installed on the second rotating rod to form differential speed between the first rotating rod and the second rotating rod.

[0016] Preferably, the ruler comprises a sliding cylinder, a transfer connecting piece and a scale, one end of the transfer connecting piece is radially installed on the sliding cylinder, the other end of the transfer connecting piece extends out of the sliding cylinder, and the scale is inserted into the end of the transfer connecting piece extending out and can rotate around the axis of the transfer connecting piece.

[0017] Preferably, the flip cover is provided with a buffer deceleration belt, the buffer deceleration belt is protruded from the roadbed, and one side of the buffer deceleration belt is higher than the other side according to the direction of the vehicle.

[0018] Preferably, the buffer deceleration belt is made of a buffer material.

[0019] Compared with the prior art, the automatic roadbed leveling measuring point device provided by the application has the following beneficial effects:

[0020] The automatic roadbed leveling measuring point device provided by the application achieves the purpose of setting an observation point in the roadbed by pre-burying a measuring point pre-burying box in the roadbed, the measuring point pre-burying box has high strength and is not easy to be crushed by a vehicle, and has a long service life; the driving assembly drives the first rotating rod to rotate, so that the flip cover assembly can slide left and right along the first rotating rod to control the opening or closing of the flip cover; meanwhile, the first rotating rod drives the turnover assembly to rotate through the transmission assembly, and then the ruler moves along a preset track to realize vertical standing or upside-down laying; in this way, when the flip cover is opened, the ruler moves and rotates and stands vertically, and when the flip cover is closed, the ruler is laid upside down and is collected in the box body; as long as the driving assembly is controlled, the opening and closing of the flip cover and the automatic vertical standing and upside-down laying of the ruler can be realized; when the flip cover is opened, the ruler stands vertically, and when the flip cover is closed, the ruler is collected in the box body; the structure is flexible, the ruler does not need to be manually placed additionally, and a measuring personnel only needs to place the leveling instrument to realize measurement, so that measurement is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on the drawings shown.

[0022] Figure 1 The structure diagram of the measuring state of the automatic roadbed leveling measuring point device provided by the present application;

[0023] Figure 2 The structure diagram of the measuring state of the automatic roadbed leveling measuring point device provided by the present application;Figure 1 Structure diagram of the automatic roadbed leveling point device in non-measuring state

[0024] Figure 3 For Figure 1 Structure diagram of the measuring point pre-embedded box

[0025] Figure 4 For Figure 3 Structure diagram of the measuring point pre-embedded box in the scale upside-down state

[0026] Figure 5 For Figure 3 Structure diagram of the measuring point pre-embedded box in the scale vertical state

[0027] Figure 6 For Figure 4 Enlarged view of part A

[0028] Figure 7 For Figure 1 Sectional view of the scale

[0029] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein merely set forth preferred combinations of components and / or other features, and that persons of ordinary skill in the art will be able to make various changes and modifications to the embodiments described herein without departing from the spirit and scope of the present application.

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0032] It should be noted that all directional indications, such as upper, lower, left, right, front, back, etc., described herein are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0033] In addition, the description related to "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0034] Please refer to Figures 1 to 4 The present application provides an automatic roadbed leveling measuring point device. The automatic roadbed leveling measuring point device 100 includes a measuring point embedded box 1 embedded in the roadbed 10 and a turnover mechanism 3 placed in the measuring point embedded box 1. It should be noted that the automatic roadbed leveling measuring point device as a whole is embedded in the roadbed 10. Since the entire automatic roadbed leveling measuring point device 100 is an independent whole structure, it can be embedded in the roadbed as a whole during use, and after the measurement is completed, the automatic roadbed leveling measuring point device can also be moved to other places for use (such as road shoulder), which can effectively improve the use frequency and application scenarios of the device and save costs. Avoid the problem of poor measurement flexibility caused by embedding the measuring point at the road shoulder through the pre-embedded foundation pre-embedded part in the prior art.

[0035] Specifically, the measuring point embedded box 1 includes a box body 11 having a containing space and a flip cover 13 rotatably connected to the box body 11 and openable. The box body 11 is a cuboid, and the box body 11 is welded from a steel plate, or is cast from reinforced concrete. The flip cover 13 is a steel plate, and the flip cover 13 is provided with a buffer deceleration belt 15, the buffer deceleration belt 15 is protruding from the upper surface of the roadbed 10, and the top surface of the buffer deceleration belt 15 is inclined. According to the direction of the construction vehicle, the side of the buffer deceleration belt 15 that the construction vehicle enters is higher than the other side (i.e. the side where the vehicle exits). As Figure 2 shown, when the construction vehicle travels from right to left, the right side of the buffer deceleration belt 15 is higher than the left side. In this way, when the construction vehicle travels through the measuring point embedded box 1, the height of the protrusion can reduce the speed of the construction vehicle, thereby reducing the damage caused by the speed, so as to effectively prolong the service life of the measuring point embedded box 1 and reduce the maintenance rate. Therefore, by providing the measuring point embedded box 1, the observation point can be arranged in the middle of the roadbed 10 and is not easily damaged, solving the problem that in the prior art, the observation point is arranged at the road shoulder to avoid being damaged by the construction vehicle, and the pre-measuring point in the middle of the roadbed 10 cannot be established.

[0036] The buffer deceleration belt 15 is made of buffer material, preferably rubber, which has certain energy absorption effect, reduces the impact force of the vehicle, and can resist the rolling pressure of the construction vehicle on the upper part of the measuring point embedded box 1.

[0037] Please refer to Figure 4 Further, the flip cover 13 and the box body 11 are connected through a hinge mechanism 17. The hinge mechanism 17 includes positioning seats 171, rotating shafts 173 and arc-shaped connecting blocks 175. Two of the positioning seats 171 are fixed on the side walls in the box body 11 and the bottom surface of the flip cover 13 respectively, one rotating shaft 173 is installed on the positioning seat 171 of the box body 11, one rotating shaft 173 is installed on the positioning seat 171 of the flip cover 13, and the connecting block 175 is installed on both ends of the two rotating shafts 173 to connect the rotating shaft 173 on the flip cover 13 and the rotating shaft 173 on the box body 11.

[0038] Please refer to Figures 4-6, non-measurement case, the turnover mechanism 3 is received in the box body 11. The turnover mechanism 3 comprises a connected driving assembly 31, a first rotating rod 33, a transmission assembly 35, a cover assembly 37 and a turnover assembly 39 with a scale 38. Specifically, the driving assembly 31 is fixed in the box body 11, the driving assembly 31 is connected with the first rotating rod 33 and the transmission assembly 35 and drives the first rotating rod 33 and the transmission assembly 35 to move at the same time. The cover 13 is drivingly connected with the first rotating rod 33 through the cover assembly 37, the first rotating rod 33 rotates and in turn drives the cover assembly 37 to move along the first rotating rod 33 to open or close the cover 13, the turnover assembly 39 is drivingly connected with the first rotating rod 33 through the transmission assembly 35, the first rotating rod 33 rotates and in turn drives the turnover assembly 39 to rotate, so that the scale 38 arranged thereon moves along a preset track to change the posture and in turn realizes the vertical or upside-down of the scale 38. The first rotating rod 33 is driven to rotate by the driving assembly 31 arranged to make the cover assembly 37 move left and right along the first rotating rod 33 to control the opening or closing of the cover 13, at the same time, the first rotating rod 33 drives the turnover assembly 39 to rotate through the transmission assembly 35, and in turn makes the scale 38 move along a preset track along with the rotation of the turnover assembly 39 to realize the vertical or upside-down, so that the scale 38 slowly moves along the track to the vertical state while the cover is opened, the scale 38 is upside-down and received in the box body 11 when the cover 13 is closed, therefore, the opening and closing of the cover 13 can be realized by controlling the driving assembly 31, the automatic vertical and upside-down of the scale 38 is realized in the opening and closing process of the cover 13, the scale 38 is vertical while the cover 13 is opened, the scale 38 is received in the box body 11 while the cover 13 is closed, the structure is flexible, manual additional scale is not needed, the surveyor only needs to place the level 20 to realize automatic measurement, so that the measurement is more convenient.

[0039] Specifically, the flip cover assembly 37 comprises a sliding block 371 sleeved on the first rotating rod 33, and a connecting rod mechanism 373 rotatably connected at one end to the sliding block 371 and at the other end to the flip cover 13. The first rotating rod 33 rotates, and the sliding block 371 moves laterally along the first rotating rod 33, so that the connecting rod mechanism 373 drives the flip cover 13 to open or close. Preferably, the first rotating rod 33 is a screw rod, and the sliding block 371 is fitted on the first rotating rod 33. The first rotating rod 33 rotates, so that the sliding block 371 can move left and right along the first rotating rod 33. In this way, the sliding block 371 can push or pull the flip cover 13 to move through the connecting rod mechanism 373 in the moving process, thereby realizing the opening or closing of the flip cover.

[0040] Preferably, the connecting rod mechanism 373 is a double connecting rod rotatably connected.

[0041] Please refer to Figure 4 and Figure 5 Specifically, in the embodiment, the flipping assembly 39 comprises a bearing seat 391, a second rotating rod 393, an elastic member 397, and a sleeve 395 provided with a sliding groove 394. The bearing seat 391 is fixed in the box body 11, the sleeve 395 is supported and fixed on the bearing seat 391, the ruler 38 is rotatably connected to the second rotating rod 393 and is limited in the sliding groove 394, and the second rotating rod 393 rotates, and the ruler 38 moves along the track of the sliding groove 394 by a preset track and distance. Specifically, the second rotating rod 393 is a screw rod, and the ruler 38 is sleeved on the screw rod. Under the movement of the screw rod, the ruler 38 moves left and right along the sliding groove 394, and under the limitation and guidance of the preset shape of the sliding groove 394, the purpose of the ruler 38 being erected and laid down is realized.

[0042] It can be understood that the moving distance and moving mode of the ruler 38 are limited by the sliding groove 394, and the opening shape and length of the sliding groove 394 determine the moving mode and moving range of the ruler 38. It needs to be explained that according to the principle of screw rod transmission, the nut will move along the guide rail in the movement process of the screw rod and the nut, and the guide rail limits the movement track of the nut. The sliding groove 394 plays the role of the guide rail in the screw rod transmission, so that the ruler 38 moves along the preset track of the sliding groove 394 to the erected state.

[0043] Please refer to Figure 5The elastic member 397 is axially sleeved on the second rotating rod 393 and is axially installed in the sleeve 395. One end of the elastic member 397 abuts against the scale 38, and the other end abuts against the bearing seat 391. The elastic member 397 is compressed and pushes the scale 38 to make a reset movement by a rebound force. Specifically, in this embodiment, the elastic member 397 is a spring. The spring can be compressed and stretched, and has a certain pre-tightening force. When the scale 38 moves to the rightmost side and is in a vertical state, the spring is compressed. When the scale 38 needs to be switched to an upside-down state, the scale 38 is driven by the second rotating rod 393 to move to the left side. It can be understood that, since the second rotating rod 393 is a screw rod, in order to avoid the problem that the scale cannot make a reset movement due to slippage in threaded transmission, the rebound force generated when the spring is compressed is applied to the scale 38 to push the scale 38 to move to the left side, thereby preventing the scale 38 from being stuck in the sliding groove 394 due to slippage. In this way, the effective movement of the scale 38 can be ensured, thereby ensuring the reliability of the overall structure.

[0044] Further, the sliding groove 394 is through the inner and outer surfaces of the sleeve 395. The sliding groove 394 includes an upper horizontal section 340, a lower horizontal section 341 and a lifting section 345 connecting the upper horizontal section 340 and the lower horizontal section 341 along the axial direction of the sleeve 395. The ruler 38 moves in the sliding groove 394 and changes the posture along with the movement track of the upper horizontal section 340, the lifting section 345 and the lower horizontal section 341. The ruler 38 is in translation in the upper horizontal section 340 and the lower horizontal section 341. The upper horizontal section 340 is arranged at the highest horizontal position of the sleeve 395, so that the ruler 38 is in vertical state when in the upper horizontal section 340. It can be understood that the lateral lower horizontal section 341 and the lateral upper horizontal section 340 are arranged and are connected by the lifting section 345, so that the movement of the ruler is along the track of the sliding groove 394 (horizontal transverse movement-lateral transverse movement-horizontal transverse movement), instead of rotating to the top of the sleeve 395 to be in vertical state and then being translated to cause collision. Therefore, the lower horizontal section 341 and the upper horizontal section 340 have the advantage of giving the flip cover 13 a certain buffer time in the process of turning over, so as to prevent the ruler from colliding with the flip cover 13. Specifically, when the flip cover 13 is opened, the initial opening angle is small. In this period of time, the ruler 38 does not have vertical action in the process of transverse movement, so that the ruler 38 does not collide with the flip cover 13. Similarly, when the flip cover 13 is closed, the ruler 38 moves in the direction of reciprocating position in the upper horizontal section, so as to first move away from the flip cover 13 in the transverse distance, thereby preventing the flip cover 13 from colliding with the ruler 38. Therefore, the sliding groove 394 not only enables the ruler 38 to move along the track, so as to realize the purposes of vertical and reverse of the ruler 38, ensures the movement track and range of the ruler 38 and the reliability of measurement, but also avoids the collision between the ruler 38 and the flip cover 13 in the movement process, effectively ensuring the reliability of the mechanism in the linkage process.

[0045] Please refer to Figure 4Specifically, the driving assembly comprises a driver 311, a transmission belt 313 and a rotating wheel 315. The first rotating rod 33 is fixed on the opposite sidewalls of the box body 11 through bearing seats. The driver 311 is fixed on the sidewall of the box body 11. The rotating wheel 315 is installed on the first rotating rod 33. The driver 311 drives the first rotating rod 33 to rotate through the transmission belt 313. The driver 311 is an electric motor. A transmission belt wheel is installed on the electric motor. The rotating wheel 315 is a belt wheel. The transmission belt 313 is wound around the transmission belt wheel of the driver 311 and the rotating wheel 315. The rotating wheel 315 rotates and drives the first rotating rod 33 to rotate. Specifically, the transmission belt 313 is two, which drives two first rotating rods 33 to rotate, and then drives two flip cover assemblies 37 to move. The flip cover assembly 37 can be connected to the first rotating rod 33 to realize transmission. It should be noted that the driver 311 is remotely controlled by a controller. When measurement is needed, the driver 311 is started by remote control. The staff 38 is automatically erected. When the measurement is finished, the driver 311 is controlled to stop. The staff 38 is automatically retracted into the box body 11 to realize automatic leveling point measurement.

[0046] Specifically, the transmission assembly 35 comprises a large belt wheel 351, a small belt wheel 353 and a synchronous belt 355 wound around the large belt wheel 351 and the small belt wheel 353. The small belt wheel 353 is installed on the first rotating rod 33. The large belt wheel 351 is installed on the second rotating rod 393 to form differential speed between the first rotating rod 33 and the second rotating rod 393. The rotating speed of the second rotating rod 393 is slower than that of the first rotating rod 33. During the opening of the flip cover 13, the staff 38 can be slowly erected. It should be noted that, due to the long opening time of the flip cover 13, the sliding block 371 needs to move a long distance. When the flip cover 13 is opened to a certain angle, the staff 38 starts to slowly stand up. Under the condition of differential speed, the staff 38 will not collide with the flip cover 13 during the standing action. Similarly, when the staff 38 returns from the vertical state to the inverted state, due to the fast rotating speed of the first rotating rod 33, but the travel distance is far, the flip cover 13 rotates and closes slowly. When the flip cover 13 is closed, the staff 38 moves in the opposite direction and is inverted slowly. The flip cover 13 will not collide with the staff 38 during the whole process. The travel is safe and reliable.

[0047] Please refer to Figure 7Further, in order to facilitate the measurement, the scale 38 is designed as a movable structure. The scale 38 comprises a sliding cylinder 381, a transfer connecting piece 383 and a scale 385. One end of the transfer connecting piece 383 is radially mounted on the sliding cylinder 381, and the other end extends out of the sliding cylinder 381. The scale 385 is inserted into the end of the transfer connecting piece 383 extending out and can rotate around the axis of the transfer connecting piece 383. Specifically, the transfer connecting piece 383 is in the shape of an I-beam. One end of the scale 385 is limited in one end of the transfer connecting piece 383. The scale 385 is twisted to adjust its direction so as to match the measurement position or angle of the level 20, thereby effectively improving the flexibility of the measurement.

[0048] The automatic roadbed leveling point device provided by the application achieves the purpose of setting an observation point in the roadbed 10 by pre-burying the measuring point pre-burying box 1 in the roadbed 10. The measuring point pre-burying box 1 has high strength and is not easily damaged by vehicles, and has a long service life. The first rotating rod 33 is driven to rotate by the driving assembly 31, so that the flip cover assembly 37 can slide left and right along the first rotating rod 33 to control the opening or closing of the flip cover 13. At the same time, the first rotating rod 33 drives the flip assembly 39 to rotate through the transmission assembly 35, so that the scale 38 moves along a preset track to realize vertical standing or upside-down placement. In this way, when the flip cover 13 is opened, the scale 38 slowly rotates and stands vertically, and when the flip cover 13 is closed, the scale 38 is placed upside down and stored in the box body 11. Therefore, the opening and closing of the flip cover 13 can be realized by controlling the driving assembly 31. The automatic vertical standing and upside-down placement of the scale 38 are realized during the opening and closing of the flip cover 13. The scale 38 stands vertically when the flip cover 13 is opened, and the scale 38 is stored in the box body 11 when the flip cover 13 is closed. The structure is flexible, and there is no need for manual additional placement of the scale. The measurer only needs to place the level 20 to realize measurement, so that the measurement is more convenient.

[0049] The above is only the preferred embodiment of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation based on the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A roadbed leveling measuring device, characterized in that, Includes the pre-embedded measuring point box and the flipping mechanism; The measuring point pre-embedded box includes a box body with a receiving space and a flip cover that is rotatably connected to the box body and can be opened and closed. The flipping mechanism is housed in the box, and the flipping mechanism includes a connected drive assembly, a first rotating rod, a transmission assembly, a flip cover assembly, and a flipping assembly with a scale. The driving component is connected to the first rotating rod and the transmission component, and simultaneously drives the first rotating rod and the transmission component to move. The flip cover is driven to the first rotating rod through the flip cover assembly. The rotation of the first rotating rod drives the flip cover assembly to move along the first rotating rod to open or close the flip cover. The flipping component is driven to the first rotating rod through the transmission component. The rotation of the first rotating rod drives the flipping component to rotate, causing the ruler mounted on it to rotate to change its posture, thereby realizing the vertical or inverted position of the ruler. The flip-top assembly includes a slider sleeved on the first rotating rod and a linkage mechanism with one end rotatably connected to the slider and the other end rotatably connected to the flip-top. When the first rotating rod rotates, the slider moves laterally along the first rotating rod, causing the linkage mechanism to flip the flip-top. The flipping assembly includes a bearing housing, a second rotating rod, and a sleeve with a groove. The bearing housing is fixed inside the housing, and the sleeve is supported and fixed on the bearing housing. The scale is slidably connected to the second rotating rod and is limited within the groove. When the second rotating rod rotates, the scale slides a preset distance along the groove while flipping.

2. The roadbed leveling measuring device according to claim 1, characterized in that, The flipping assembly also includes an elastic element, which is axially sleeved outside the second rotating rod and axially installed inside the sleeve. One end of the elastic element abuts against the scale, and the other end abuts against the bearing seat.

3. The roadbed leveling measuring device according to claim 1, characterized in that, The groove extends through the inner and outer surfaces of the sleeve and is opened along the axial direction of the sleeve. The groove includes an upper horizontal section, a lower horizontal section, and a lifting section connecting the upper horizontal section and the lower horizontal section. The scale moves within the groove and changes its posture with the movement trajectory of the horizontal section, the lifting section, and the lower horizontal section.

4. The roadbed leveling measuring device according to claim 2, characterized in that, The elastic element is a spring.

5. The roadbed leveling measuring point device according to claim 1, characterized in that, The drive assembly includes a driver, a transmission belt, and a rotating wheel. The driver is fixed inside the housing, and the rotating wheel is mounted on the first rotating rod. The driver drives the first rotating rod to rotate via the transmission belt.

6. The roadbed leveling measuring device according to claim 1, characterized in that, The transmission assembly includes a large pulley, a small pulley, and a synchronous belt wound around the large pulley and the small pulley. The small pulley is mounted on the first rotating rod, and the large pulley is mounted on the second rotating rod, so that the first rotating rod and the second rotating rod form a differential speed.

7. The roadbed leveling measuring device according to claim 1, characterized in that, The scale includes a sliding cylinder, a transfer connector, and a scale. One end of the transfer connector is radially mounted to the sliding cylinder, and the other end extends radially outside the sliding cylinder. The scale is inserted into the extended end of the transfer connector and can rotate around the axis of the transfer connector.

8. The roadbed leveling measuring device according to claim 1, characterized in that, The flip cover is equipped with a buffer speed bump, which is raised above the roadbed. Depending on the direction of vehicle travel, the side of the vehicle entering the buffer speed bump is higher than the other side.

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