Road gradient measuring device

Abstract

The invention relates to a road gradient measuring device, and relates to the technical field of gradient measurement, the road gradient measuring device comprises a base, a measuring mechanism is arranged on the base, a moving mechanism and an out-of-control preventing mechanism are arranged in the base, the out-of-control preventing mechanism is in transmission connection with the moving mechanism, the base supports and fixes the moving mechanism, and the measuring mechanism is arranged on the base. The top of the base supports and fixes the measuring mechanism, the moving mechanism drives the device to move, the measuring device can conveniently detect different positions on a ramp, automatic gradient detection is achieved, and the out-of-control prevention mechanism conducts transmission and electrical interference on the moving mechanism. And if the moving mechanism is out of control and slides on a slope, the out-of-control preventing mechanism cuts off energy of the moving mechanism and locks transmission of the moving mechanism at the same time, so that the gradient measuring device stably brakes in time, accidents caused by slope sliding of the gradient measuring device are prevented, and damage to the device and danger to personnel safety are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of slope measurement, and in particular to a road slope measuring device. Background Art

[0002] In the process of modern urban construction, highway construction and maintenance, accurate road slope measurement is of great significance for ensuring driving safety, optimizing traffic safety and improving driving comfort.

[0003] However, existing road slope measurement devices are generally bulky and difficult to maneuver, making them difficult to adapt to complex terrain and different road types. Furthermore, some devices are prone to accidents such as uncontrolled sliding when used on steep or irregular terrain. This can lead to reduced accuracy, low work efficiency, and even equipment or personnel losses during measurement, making it impossible to effectively respond to emergencies. These issues limit the application of slope measurement.

[0004] Therefore, in view of the above situation, there is an urgent need to develop a road slope measuring device to overcome the current practical deficiencies. Summary of the Invention

[0005] In order to solve the defects in the above technology, the present application provides a road slope measuring device.

[0006] This application provides a road slope measurement device, which adopts the following technical solutions: A road slope measuring device comprises a base, on which a measuring mechanism is arranged, wherein a moving mechanism for moving the measuring mechanism to a specified position and an anti-loss-of-control mechanism for preventing the moving mechanism from sliding on a slope are arranged inside the base, and the anti-loss-of-control mechanism is transmission-connected to the moving mechanism.

[0007] Optionally, the measuring mechanism includes a lifting rod, which is arranged on the top of the base, a protective cover is provided on the lifting rod, a tilt sensor is provided in the protective cover, a display screen is provided on the side wall of the lifting rod, and a power supply module is provided in the lifting rod, which is electrically connected to the tilt sensor, the display screen, and the lifting rod respectively.

[0008] Optionally, the moving mechanism comprises a motor, the motor is arranged in the object loading cavity of the base, the driving end of the motor is provided with a bevel gear one, the bottom of the base is vertically rotatably provided with a rotating shaft one, the rotating shaft one and the base are provided with a rotating bearing, the top and bottom of the rotating shaft one are respectively provided with a bevel gear two and a bevel gear three, the bevel gear one and the bevel gear two are engaged, the bottom of the base is provided with a limiting box and a limiting plate, the inner wall of the limiting box is horizontally rotatably provided with a driving shaft, the part of the driving shaft in the limiting box is provided with a bevel gear four, the bevel gear three and the bevel gear four are engaged, the limiting plate is horizontally rotatably provided with a driven shaft, and the two ends of the driving shaft and the driven shaft are respectively fixedly provided with locking wheels.

[0009] Optionally, the locking wheel comprises two rotating wheels, the centers of the two rotating wheels are spaced apart and arranged at one end of the driving shaft, and the two rotating wheels are fixedly connected through a connecting column.

[0010] Optionally, the anti-out-of-control mechanism comprises a limiting cylinder, the top of the object loading cavity is fixedly provided with the limiting cylinder, the limiting cylinder is inserted with a locking sleeve, the two ends of the limiting cylinder are fixedly provided with limiting strips, the limiting strips are inserted into limiting grooves formed in the inner wall of the locking sleeve, the top of the bevel gear two is provided with an insertion slot, and the bottom of the locking sleeve is provided with an insertion tooth corresponding to the insertion slot.

[0011] Optionally, the top of the object loading cavity is fixedly provided with a limiting square column, a top column one is horizontally inserted into the limiting square column, one end of the top column one is inserted into a stop square hole formed in the side wall of the locking sleeve, the other end of the top column one is hingedly connected to two groups of trigger assemblies respectively on both sides, the outer wall of the locking sleeve is fixedly provided with support rods respectively on both sides, the support rods pass through avoiding square holes formed in the wall of the base and extend out of the base, the part of the support rods extending out of the base is fixedly provided with horizontal rods, and the bottom of each horizontal rod is fixedly provided with an insertion rod corresponding to the two locking wheels respectively.

[0012] Optionally, the trigger assembly comprises a top column two, the top column two is horizontally inserted into the inner wall of the base below, one end of the top column two extending out of the base is fixedly connected to a buffer plate, a buffer spring is sleeved on the part of the top column two between the buffer plate and the outer wall of the base, a rotating disc is rotatably arranged between the inner walls of the two sides of the object loading cavity, a limiting block is arranged on the inner wall of the object loading cavity on one side of the rotating disc, the other end of the top column two is hingedly connected to the lower part of the rotating disc through a connecting module one, and the upper part of the rotating disc is hingedly connected to the other end of the top column one through a connecting module two.

[0013] Optionally, the connecting module one comprises a connecting plate one, one end of the connecting plate one is hinged to the other end of the top column two, the other end of the connecting plate one is hinged to one end of a connecting plate two, the other end of the connecting plate two is fixedly connected to the lower part of the rotating circular plate.

[0014] Optionally, the connecting module two comprises a connecting plate three, one end of the connecting plate three is hinged to the other end of the top column one, the other end of the connecting plate three is hinged to one end of a connecting plate four, the other end of the connecting plate four is fixedly connected to the upper part of the rotating circular plate.

[0015] Optionally, the other end of the top column one is provided with a trigger block, and the inner wall of the object cavity is provided with an electric switch corresponding to the trigger block, and the electric switch is connected with the motor through an electric signal.

[0016] In summary, the present application has the following at least one beneficial technical effect: 1. The present application can accurately measure the slope of the road by adopting a high-precision tilt sensor and a stable lifting rod, and can ensure accurate evaluation of the slope during road design, construction and maintenance; 2. The design of the mobile mechanism in the present application enables the device to move freely on different terrains, adapt to complex slope terrains, especially in mountainous, hilly and other terrains, and effectively overcome the difficulties that traditional measuring devices cannot cope with; 3. The setting of the anti-runaway mechanism in the present application effectively avoids the device from running out of control on a slope or in an unstable terrain, ensuring the safety of the equipment and personnel, and the design of the limiting cylinder, locking sleeve and trigger assembly effectively avoids safety hazards in emergency situations. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic diagram provided by the embodiment of the present application; Figure 2 is the overall cross-sectional structure schematic diagram provided by the embodiment of the present application; Figure 3 is the partial cross-sectional structure schematic diagram provided by the embodiment of the present application; Figure 4 is Figure 3 is the enlarged structure schematic diagram of part A in the present application; Figure 5 is the bottom view structure schematic diagram provided by the embodiment of the present application.

[0018] Explanation of reference signs: 1, base; 11, object loading cavity; 12, limiting block; 2, measuring mechanism; 21, lifting rod; 22, protective cover; 23, display screen; 24, inclination sensor; 3, moving mechanism; 31, motor; 32, bevel gear one; 33, rotating shaft one; 34, rotating bearing; 35, bevel gear two; 36, bevel gear three; 37, limiting box; 38, limiting plate; 39, driving shaft; 40, bevel gear four; 41, driven shaft; 42, locking wheel; 421, rotating wheel; 422, connecting column; 5, anti-out-of-control mechanism; 51, limiting cylinder; 52, locking sleeve; 53, limiting strip; 54, limiting groove; 55, insertion groove; 56, insertion tooth; 57, limiting square column; 58, top column one; 59, stop square hole; 60, supporting rod; 61, avoiding square hole; 62, horizontal rod; 63, insertion rod; 64, triggering assembly; 641, top column two; 642, buffer plate; 643, buffer spring; 644, rotating disc; 645, connecting module one; 6451, connecting plate one; 6452, connecting plate two; 646, connecting module two; 6461, connecting plate three; 6462, connecting plate four; 65, triggering block; 66, electric switch. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0020] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and does not mean to specially indicate the order or sequence, nor to limit the present application, which is merely to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features among various embodiments can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions appears to be 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.

[0021] The present application provides the following embodiments Embodiment 1

[0022] The embodiments of the present application disclose a road slope measuring device, such as Figure 1As shown, it includes a base 1, on which a measuring mechanism 2 is provided. A moving mechanism 3 for moving the measuring mechanism 2 to a specified position and an anti-loss-of-control mechanism 5 for preventing the moving mechanism 3 from sliding on a slope are provided in the base 1, and the anti-loss-of-control mechanism 5 is transmission-connected to the moving mechanism 3.

[0023] The working principle and beneficial effects of the above technical solution are as follows: the base 1 supports and fixes the mobile mechanism 3, the top of the base 1 supports and fixes the measuring mechanism 2, the mobile mechanism 3 drives the device to move, which facilitates the measuring device to detect different positions on the slope, and realizes automatic slope detection. The anti-loss-of-control mechanism 5 performs transmission and electrical interference on the mobile mechanism 3. When the slope measuring device detects the slope on the road slope, if the mobile mechanism 3 loses control and slides, the anti-loss-of-control mechanism 5 cuts off the energy of the mobile mechanism 3 and locks the transmission of the mobile mechanism 3, so that the slope measuring device can perform stable braking in time to prevent the slope measuring device from sliding accidentally, thereby causing damage to the device and endangering the safety of personnel. Example 2

[0024] On the basis of Example 1, Figures 1-2 As shown, the measuring mechanism 2 includes a lifting rod 21, which is arranged at the top of the base 1, and a protective cover 22 is provided on the lifting rod 21. A tilt sensor 24 is provided in the protective cover 22, and a display screen 23 is provided on the side wall of the lifting rod 21. A power supply module is provided in the lifting rod 21, and the power supply module is electrically connected to the tilt sensor 24, the display screen 23, and the lifting rod 21 respectively.

[0025] The working principle and beneficial effects of the above technical solution are as follows: the base 1 supports and fixes the lifting rod 21, and the lifting rod 21 adjusts the height of the tilt sensor 24 to adapt to different measurement scenarios; the tilt sensor 24 includes an accelerometer and a gyroscope, and the accelerometer and the gyroscope are used together to more comprehensively detect the inclination data of the road and transmit the data to the display screen; the display screen 23 displays the slope value in real time; the energy supply module in this application is a battery, and the battery supplies power to the control module of the moving mechanism 3, the accelerometer, the gyroscope, and the lifting rod 21. Example 3

[0026] On the basis of Example 2, Figures 1-5As shown, the moving mechanism 3 comprises a motor 31 arranged in a loading cavity 11 formed in the base 1, a driving end of the motor 31 is provided with a bevel gear one 32, a bottom of the base 1 is vertically rotatably provided with a rotating shaft one 33, the rotating shaft one 33 is provided with a rotating bearing 34 between the base 1, the rotating shaft one 33 is provided with a bevel gear two 35 and a bevel gear three 36 at the top and the bottom respectively, the bevel gear one 32 and the bevel gear two 35 are engaged, the bottom of the base 1 is provided with a limiting box 37 and a limiting plate 38, a driving shaft 39 is horizontally rotatably arranged on an inner wall of the limiting box 37, the driving shaft 39 is provided with a bevel gear four 40 at a portion in the limiting box 37, the bevel gear three 36 and the bevel gear four 40 are engaged, a driven shaft 41 is horizontally rotatably arranged on the limiting plate 38, the driving shaft 39 and the driven shaft 41 are respectively fixedly provided with locking wheels 42 at two ends thereof. The locking wheel 42 comprises two rotating wheels 421, centers of the two rotating wheels 421 are spaced apart at one end of the driving shaft 39, the two rotating wheels 421 are fixedly connected through a connecting column 422.

[0027] The working principle and beneficial effects of the above technical scheme are as follows: the loading cavity 11 fixes and supports the motor 31, the driving end of the motor 31 drives the bevel gear one 32 to rotate, the bottom of the loading cavity 11 fixes the rotating bearing 34, the rotating bearing 34 assists the rotation of the rotating shaft one 33, the rotating shaft one 33 fixes the bevel gear two 35 and the bevel gear three 36, the bottom of the base 1 fixes the limiting box 37 and the limiting plate 38, the driving shaft 39 rotates in the limiting box 37, the driven shaft 41 rotates in the limiting plate 38, the driving shaft 39 fixes the bevel gear four 40, the motor 31 drives the rotating shaft one 33 to rotate through the engagement of the bevel gear one 32 and the bevel gear two 35, and the power is transmitted to the driving shaft 39 through the engagement of the bevel gear three 36 and the bevel gear four 40, the driving shaft 39 drives the locking wheel 42 to rotate, the driven shaft 41 cooperates to realize four-wheel synchronous driving, so as to realize the movement of the slope measurement device. The locking wheel 42 is connected by a plurality of connecting columns 422 to form a cavity between two connecting columns 422 and two rotating wheels 421, the cavity avoids a part of the concave and convex section on the advancing route, which facilitates the adaptation of the locking wheel 42 to the uneven slope section when climbing uphill, and increases the measurement stability and precision of the slope measurement device. Embodiment 4

[0028] On the basis of embodiment 3, as Figures 1-4Also shown, the anti-runaway mechanism 5 includes a limiting cylinder 51, the top of the object loading cavity 11 is fixedly provided with the limiting cylinder 51, a locking sleeve 52 is inserted on the limiting cylinder 51, limiting strips 53 are fixedly arranged at both ends of the limiting cylinder 51, the limiting strips 53 are inserted into limiting grooves 54 formed on the inner wall of the locking sleeve 52, an insertion slot 55 is formed at the top of the bevel gear two 35, and insertion teeth 56 are arranged at the bottom of the locking sleeve 52 corresponding to the insertion slot 55; A limiting square column 57 is fixedly arranged at the top of the object loading cavity 11, a top column one 58 is horizontally inserted into the limiting square column 57, one end of the top column one 58 is inserted into a stop square hole 59 formed on the side wall of the locking sleeve 52, the other end of the top column one 58 is hingedly connected to two groups of trigger assemblies 64 respectively, support rods 60 are fixedly arranged on the outer wall of the locking sleeve 52 respectively, the support rods 60 pass through avoiding square holes 61 formed on the wall of the base 1 and extend out of the base 1, the part of the support rods 60 extending out of the base 1 is fixedly provided with horizontal rods 62, and two insertion rods 63 are fixedly arranged at the bottom of the horizontal rods 62 corresponding to the two locking wheels 42 respectively.

[0029] The working principle and beneficial effects of the above technical solution are as follows: the top of the object loading cavity 11 is fixed to the limiting cylinder 51, the limiting cylinder 51 limits the horizontal direction of the locking sleeve 52 arranged thereon, so that the locking sleeve 52 can only move in a direction perpendicular to the ground of the object loading cavity 11, the limiting strips 53 fixedly arranged at both sides of the limiting cylinder 51 are clamped in the limiting grooves 54 formed in the locking sleeve 52, so as to prevent the locking sleeve 52 from rotating, when the locking sleeve 52 falls in a direction perpendicular to the ground of the object loading cavity 11, the insertion teeth 56 at the bottom of the locking sleeve 52 are inserted into the insertion slot 55 formed at the top of the bevel gear two 35, the locking sleeve 52 that cannot rotate locks the rotating shaft one 33, and the rotating shaft one 33 cannot rotate, due to the meshing of the bevel gear three 36 and the bevel gear four 40, the driving wheel is locked and cannot rotate, so as to prevent the slope measuring device from sliding down the slope; The top of the object loading cavity 11 is fixed to the limiting square column 57, the limiting square column 57 limits the vertical direction of the top column one 58, so that the top column one 58 only reciprocates in a direction perpendicular to the limiting square column 57 in the limiting square column 57, one end of the top column one 58 is inserted into the stop square hole 59 formed on the sleeve wall of the locking sleeve 52 before the locking sleeve 52 falls, the top column one 58 moves away from the locking sleeve 52 after the trigger assembly 64 triggers the top column one 58, the top column one 58 leaves the locking sleeve 52, and the locking sleeve 52 falls to lock the driving shaft 39 in the above-mentioned manner; The outer wall of the locking sleeve 52 fixes the support rods 60 on both sides, the support rods 60 fix the horizontal rods 62 outside the base 1, the horizontal rods 62 fix the two insertion rods 63 at the bottom, when the locking sleeve 52 falls, the locking sleeve 52 drives the two support rods 60 on both sides, the horizontal rods 62 on the two support rods 60 and the two insertion rods 63 at the bottom of the horizontal rods 62 to fall downward synchronously, the square hole 61 avoids the support rods 60 extending outside the base 1 and the descent of the support rods 60, and the four insertion rods 63 fall into the locking wheel 42 cavities on both sides of the driving wheel and the driven wheel, further locking the locking wheel 42, preventing the situation of sliding downhill. Example 5

[0030] Based on example 4, as shown in Figure 1 , Fig. 2, Figure 5 The trigger assembly 64 includes a top column two 641, the inner wall of the base 1 is horizontally inserted with the top column two 641, one end of the top column two 641 extending out of the base 1 is fixedly connected with the buffer plate 642, the buffer spring 643 is sleeved on part of the top column two 641 between the buffer plate 642 and the outer wall of the base 1, the rotating circular plate 644 is rotatably arranged between the inner walls of the two sides of the object loading cavity 11, the limiting block 12 is arranged on one side of the inner wall of the object loading cavity 11 of the rotating circular plate 644, the other end of the top column two 641 is connected with the lower part of the rotating circular plate 644 through the connecting module one 645, and the upper part of the rotating circular plate 644 is hingedly connected with the other end of the top column one 58 through the connecting module two 646. The connecting module one 645 includes a connecting plate one 6451, one end of the connecting plate one 6451 is hingedly connected with the other end of the top column two 641, the other end of the connecting plate one 6451 is hingedly connected with one end of the connecting plate two 6452, and the other end of the connecting plate two 6452 is fixedly connected with the lower part of the rotating circular plate 644. The connecting module two 646 includes a connecting plate three 6461, one end of the connecting plate three 6461 is hingedly connected with the other end of the top column one 58, the other end of the connecting plate three 6461 is hingedly connected with one end of the connecting plate four 6462, and the other end of the connecting plate four 6462 is fixedly connected with the upper part of the rotating circular plate 644.

[0031] The working principle and beneficial effects of the above technical solution are as follows: the bottom of the base 1 supports multiple top pillars 641, and the top pillars 641 reciprocate in a direction parallel to the bottom of the base 1. The part of the top pillars 641 extending outside the base 1 fixes the buffer plate 642, and the outer wall of the base 1 and the buffer plate 642 limit the buffer spring 643 sleeved on the top pillar 641. The buffer spring 643 elastically supports the buffer block and the top pillar 641. When the top pillar 641 moves toward the direction close to the locking sleeve 52, the top pillar 641 drives the rotating circular plate 644 to rotate through the connecting module 1 645, and the rotating circular plate 644 drives the connecting module 2 646 to rotate. The connecting module 2 646 pulls the top pillar 1 58 to move in the direction away from the locking sleeve 52, and the top pillar 1 58 disengages from the locking sleeve 52, and the locking sleeve 52 falls downward, thereby realizing the locking of the slope measuring device; By the hinged connection between top column 2 641 and connecting plate 1 6451, the hinged connection between connecting plate 1 6451 and connecting plate 2 6452, and the fixed connection between connecting plate 2 6452 and rotating circular plate 644, top column 2 641 is moved toward the locking sleeve 52 and the rotating circular plate 644 is rotated at the same time. The rotation of rotating circular plate 644 drives connecting plate 4 6462 to rotate. By the hinged connection between connecting plate 4 6462 and connecting plate 3 6461, and the hinged connection between connecting plate 3 6461 and top column 1 58, top column 1 58 is pulled horizontally toward and away from the locking sleeve 52, thereby triggering the locking sleeve 52 to fall downward. When the control movement mechanism 3 drives the road slope measuring device to move to the designated ramp position, the measuring mechanism 2 measures the ramp angle at that location. At this time, the connecting plate 1 6451 and the connecting plate 2 6452 tend to move away from the locking sleeve 52. The limit block 12 blocks the movement of the connecting plate 1 6451 and the connecting plate 2 6452, preventing the top column 2 641 from losing control and moving away from the locking sleeve 52, causing the anti-loss control mechanism 5 to fail. When the slope measuring device accidentally starts to slide, the slope measuring device moves down the slope, and the wind resistance applies force to the buffer plate 642. Under the action of the wind resistance, the buffer plate 642 drives the top column 2 641 to move toward the locking sleeve 52, and the buffer spring 643 is compressed, and the above-mentioned locking transmission of the rotating shaft 1 33 and the four locking wheels 42 begins. Example 6

[0032] On the basis of Example 5, Figures 2-3 As shown, a trigger block 65 is provided on the other end of the top column 58, and an electric switch 66 is provided on the inner wall of the loading chamber 11 corresponding to the trigger block 65. The electric switch 66 is connected to the motor 31 through an electric signal.

[0033] The working principle and beneficial effects of the technical scheme are as follows: when the top column I is triggered to move away from the locking sleeve, the trigger block fixedly arranged at the other end of the top column I touches the electric switch arranged on the inner wall of the object cavity, the electric switch is touched to send an electric signal to control the motor to be closed, so that the motor is prevented from being in an open state during the time from the start of the vehicle to being locked, and the driving end of the motor is forced to rotate reversely in the open state, thereby causing damage to the motor.

[0034] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A road slope measuring device, characterized by: The utility model provides a kind of slope measuring device, including base (1), the base (1) is provided with measuring mechanism (2), the base (1) is provided with moving mechanism (3) for moving the measuring mechanism (2) to specified position and anti-runaway mechanism (5) for preventing moving mechanism (3) from sliding on slope in the inside, the anti-runaway mechanism (5) is driving connection with the moving mechanism (3).

2. A road gradient measuring device according to claim 1, characterised in that: The measuring mechanism (2) includes a lifting rod (21), which is arranged on the top of the base (1), a protective cover (22) is arranged on the lifting rod (21), an inclination sensor (24) is arranged in the protective cover (22), a display screen (23) is arranged on the side wall of the lifting rod (21), and a power supply module is arranged in the lifting rod (21), which is electrically connected with the inclination sensor (24), the display screen (23) and the lifting rod (21) respectively.

3. A road gradient measuring device according to claim 1, characterised in that: The moving mechanism (3) includes a motor (31), which is arranged in the object-carrying cavity (11) formed in the base (1), a bevel gear (32) is arranged on the driving end of the motor (31), a rotating shaft (33) is arranged vertically on the bottom of the base (1), a rotating bearing (34) is arranged between the rotating shaft (33) and the base (1), a bevel gear (35) and a bevel gear (36) are arranged on the top and bottom of the rotating shaft (33) respectively, the bevel gear (32) and the bevel gear (35) are engaged, a limiting box (37) and a limiting plate (38) are arranged on the bottom of the base (1), a driving shaft (39) is arranged horizontally on the inner wall of the limiting box (37), a bevel gear (40) is arranged on the part of the driving shaft (39) in the limiting box (37), the bevel gear (36) and the bevel gear (40) are engaged, and a driven shaft (41) is arranged horizontally on the limiting plate (38), and locking wheels (42) are fixedly arranged on both ends of the driving shaft (39) and the driven shaft (41).

4. A road gradient measuring device according to claim 3, characterised in that: The locking wheel (42) includes two rotating wheels (421), the centers of the two rotating wheels (421) are arranged at intervals on one end of the driving shaft (39), and the two rotating wheels (421) are fixedly connected by a connecting column (422).

5. A road gradient measuring device according to claim 3, characterised in that: The anti-runaway mechanism (5) includes a limiting cylinder (51), the limiting cylinder (51) is fixedly arranged on the top of the object-carrying cavity (11), a locking sleeve (52) is inserted on the limiting cylinder (51), limiting strips (53) are fixedly arranged on both ends of the limiting cylinder (51), the limiting strips (53) are inserted into limiting grooves (54) formed on the inner wall of the locking sleeve (52), an insertion slot (55) is formed on the top of the bevel gear (35), and insertion teeth (56) are arranged on the bottom of the locking sleeve (52) corresponding to the insertion slot (55).

6. A road gradient measuring device according to claim 5, characterised in that: The top of the carrier cavity (11) is fixedly provided with a limiting square column (57), a top column I (58) is horizontally inserted in the limiting square column (57), one end of the top column I (58) is inserted in a stop square hole (59) formed in the side wall of the locking sleeve (52), the other end of the top column I (58) is hingedly connected with two groups of trigger assemblies (64) respectively, the outer wall of the locking sleeve (52) is fixedly provided with a support rod (60) on both sides respectively, the support rod (60) extends out of the base (1) through an avoiding square hole (61) formed in the wall of the base (1), and the part of the support rod (60) extending out of the base (1) is fixedly provided with a horizontal rod (62), and the bottom of the horizontal rod (62) is fixedly provided with two insertion rods (63) corresponding to two locking wheels (42) respectively.

7. A road gradient measuring device according to claim 6, characterised in that: The trigger assembly (64) comprises a top column II (641), the top column II (641) is horizontally inserted below the inner wall of the base (1), one end of the top column II (641) extending out of the base (1) is fixedly connected with a buffer plate (642), a buffer spring (643) is sleeved on the part of the top column II (641) between the buffer plate (642) and the outer wall of the base (1), and a rotating circular plate (644) is rotatably arranged between the inner walls of the two sides of the carrier cavity (11), a limiting block (12) is arranged on the inner wall of the carrier cavity (11) on one side of the rotating circular plate (644), the other end of the top column II (641) is hingedly connected with the lower part of the rotating circular plate (644) through a connecting module I (645), and the upper part of the rotating circular plate (644) is hingedly connected with the other end of the top column I (58) through a connecting module II (646).

8. A road gradient measuring device according to claim 7, characterised in that: The connecting module I (645) comprises a connecting plate I (6451), one end of the connecting plate I (6451) is hingedly connected with the other end of the top column II (641), the other end of the connecting plate I (6451) is hingedly connected with one end of a connecting plate II (6452), and the other end of the connecting plate II (6452) is fixedly connected with the lower part of the rotating circular plate (644).

9. A road gradient measuring device according to claim 7, characterised in that: The connecting module II (646) comprises a connecting plate III (6461), one end of the connecting plate III (6461) is hingedly connected with the other end of the top column I (58), the other end of the connecting plate III (6461) is hingedly connected with one end of a connecting plate IV (6462), and the other end of the connecting plate IV (6462) is fixedly connected with the upper part of the rotating circular plate (644).

10. A road gradient measuring device according to claim 6, characterised in that: A trigger block (65) is arranged on the other end of the top column I (58), an electric switch (66) is arranged on the inner wall of the carrier cavity (11) corresponding to the trigger block (65), and the electric switch (66) is connected with the motor (31) through an electric signal.

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