Engineering flatness testing device

Abstract

This invention relates to an engineering flatness testing device, comprising a frame, wheels, and a height difference measuring sensor. The frame also includes a rotating cleaning device, driven casters, and a transmission device. The rotating cleaning device is positioned in front of the height difference measuring sensor, and the driven casters are rotatably mounted on the frame. During operation, the driven casters rotate due to friction with the ground. The transmission device connects the driven casters and the rotating cleaning device. In use, the driven casters rotate due to friction with the ground surface, driving the rotating cleaning device via the transmission device to clean the ground in front of the height difference measuring sensor. This reduces the chance of the height difference measuring sensor encountering small stones or mud, improving the accuracy of flatness testing. Furthermore, the rotating cleaning device requires no additional motor or engine, and no additional power or fuel, making it convenient to use.

Description

Technical Field

[0001] This invention relates to the field of equipment technology for road and bridge engineering, and specifically to a flatness testing device for engineering applications. Background Technology

[0002] Continuous road surface evenness testers are commonly used instruments for testing road surface evenness. According to industry standard JTG3450-2019, "Specifications for Field Testing of Highway Subgrade and Pavement," a typical continuous road surface evenness tester consists of a frame that can be shortened or folded. It has four wheels at the front and four at the back, with a 3-meter axle distance between the front and rear sets of wheels. A ground elevation difference measurement sensor is installed in the middle of the frame. This sensor can be a movable measuring wheel or a laser rangefinder. The specific structure can also be referenced in patent CN2506689Y regarding road surface evenness testers. In actual use, newly constructed road surfaces often contain small stones and mud, which can affect the measurement structure. When the measuring wheels of the road surface evenness tester or the laser rangefinder pass through these small stones and mud, errors can occur in the measurement results, leading to inaccurate evenness detection. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an engineering flatness testing device to solve the problem that existing continuous flatness testers are prone to inaccurate flatness testing.

[0004] This invention is achieved through the following technical solution:

[0005] An engineering flatness testing device includes a frame, wheels, and a height difference measuring sensor. The frame is also equipped with a rotating cleaning device, driven casters, and a transmission device. The rotating cleaning device is positioned in front of the height difference measuring sensor, and the driven casters are rotatably mounted on the frame. When the engineering flatness testing device moves, the driven casters can rotate due to friction with the ground. The transmission device drives the driven casters and the rotating cleaning device.

[0006] Furthermore, the rotary cleaning device includes a horizontally arranged cleaning brush and a vertically arranged main shaft. The main shaft is rotatably and slidably mounted on the frame, and is positioned biased towards the side of the height difference measuring sensor. A cylindrical cam is also provided at the upper end of the main shaft, and a cam follower is fixed on the frame. The cam follower cooperates with the cylindrical cam to form a cylindrical cam mechanism, enabling the main shaft to periodically rise and fall. One end of the cleaning brush is fixed at the lower end of the main shaft, and the cleaning brush is arranged in accordance with the rising and falling cycle of the main shaft, so that the other end of the cleaning brush extends towards the side of the main shaft away from the height difference measuring sensor during the rising cycle of the main shaft.

[0007] Furthermore, the cleaning brush and the main shaft are provided in two sets on both sides of the height difference measuring sensor, and the lifting cycles of the main shaft on both sides of the height difference measuring sensor are set in opposite directions.

[0008] Furthermore, the main shaft located to the right front of the elevation difference measuring sensor is configured to rotate clockwise, while the main shaft located to the left front of the elevation difference measuring sensor is configured to rotate counterclockwise.

[0009] Furthermore, the frame is also provided with an elastic support member, and the side wall of the spindle is provided with a support portion. One end of the elastic support member is connected to the frame, and the other end of the elastic support member is connected to the support portion. The elastic support member provides an upward elastic force to the support portion.

[0010] Furthermore, the elastic support is a helical spring, with the lower end of the helical spring fixed to the frame and the upper end of the helical spring supporting the support portion.

[0011] Furthermore, the cam follower is a roller.

[0012] Furthermore, the transmission device includes a first spur gear, a second spur gear, and a transmission shaft. The first spur gear is synchronously rotated with the driven caster, the second spur gear is synchronously rotated with the main shaft, and the transmission shaft is rotatably mounted on the frame. Both ends of the transmission shaft are respectively provided with crown gears that mesh with the first spur gear and the second spur gear.

[0013] Furthermore, the main shaft is provided with a spline, and the second spur gear is slidably sleeved on the spline.

[0014] Furthermore, the driven caster is one or more of the traveling wheels.

[0015] The beneficial effects of this invention are as follows:

[0016] When the flatness detection device is in operation, it is moved manually or by vehicle traction. Driven casters rotate due to friction with the bottom surface, and a transmission mechanism drives a rotary cleaning device to clean the ground in front of the elevation difference sensor. This reduces the occurrence of small stones or mud clods passing over the elevation difference sensor, improving the accuracy of flatness detection. Simultaneously, the rotary cleaning device requires no additional motor or engine, and no additional power or fuel, making it easy to use. During the rotation of the main shaft, a cylindrical cam mechanism causes the main shaft to periodically rise and fall. Outside the rising cycle of the main shaft, the cleaning brush cleans the ground directly in front of the elevation difference sensor, sweeping small stones or mud clods away from the area directly in front of the sensor. During the rising cycle of the main shaft, the cleaning brush rises away from the ground with the main shaft, preventing small stones or mud clods from being swept back into the area directly in front of the sensor, thus reducing the occurrence of small stones or mud clods passing over the sensor. The opposing rising and falling cycles of the main shafts on both sides of the elevation difference sensor ensure that at least one side of the cleaning brush is in the state of cleaning the ground directly in front of the sensor, improving the cleaning effect. By controlling the rotation of the main shaft, small stones or mud can be prevented from being swept towards the height difference sensor when the sweeping brush rotates into the area directly in front of the sensor, thus reducing the risk of these objects affecting the flatness detection. The elastic support component still generates an upward elastic force when the main shaft rises, thereby reducing the interaction force between the cam follower and the cylindrical cam in the vertical direction, reducing wear, and increasing the service life of the cylindrical cam and cam follower.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an engineering flatness detection device provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 The front view of the engineering flatness testing device shown;

[0020] Figure 3 for Figure 1 Left view of the engineering flatness testing device shown;

[0021] Figure label:

[0022] 1-Frame, 2-Walking wheel, 3-Height difference measurement sensor, 4-Rotary cleaning device, 41-Main shaft, 411-Support part, 42-Cleaning brush, 43-Cylindrical cam, 44-Cam follower, 45-Elastic support, 5-Driven caster, 6-Transmission device, 61-First spur gear, 62-Second spur gear, 63-Drive shaft. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for 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 the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0028] Please see Figures 1 to 3This invention provides a technical solution: an engineering flatness detection device, including a frame 1, wheels 2, and a height difference measurement sensor 3. The frame 1 is also equipped with a rotating cleaning device 4, driven casters 5, and a transmission device 6. The rotating cleaning device 4 is positioned in front of the height difference measurement sensor 3. The driven casters 5 are rotatably mounted on the frame 1. When the engineering flatness detection device moves, the driven casters 5 rotate due to friction with the ground. The transmission device 6 drives the driven casters 5 and the rotating cleaning device 4. In use, the driven casters 5 rotate due to friction with the bottom surface and drive the rotating cleaning device 4 through the transmission device 6 to clean the ground in front of the height difference measurement sensor 3. This reduces the occurrence of small stones or mud on the ground where the height difference measurement sensor 3 passes, improving the accuracy of flatness detection. Furthermore, the rotating cleaning device 4 does not require an additional motor or engine, nor does it require additional power or fuel, making it convenient to use.

[0029] Specifically, the traveling wheels 2 and the elevation difference measurement sensor 3 can be referenced from existing technologies. The frame 1 can be adapted as needed. The rotary cleaning device 4 is used to clean the ground in front of the elevation difference measurement sensor 3. In one embodiment, the driven casters 5 are one or more of the traveling wheels 2. It is understood that the driven casters 5 transmit rotational output through their axles.

[0030] Please refer to the following information again. Figures 1 to 3In one embodiment, the rotary cleaning device 4 includes a horizontally arranged cleaning brush 42 and a vertically arranged main shaft 41. The main shaft 41 is rotatably and slidably mounted on the frame 1. The main shaft 41 is positioned biased towards the side of the height difference measuring sensor 3. It can be understood that being biased towards the side of the height difference measuring sensor 3 means that the height difference measuring sensor 3 is positioned to the left or right of the side of the device when it is in use with the engineering flatness detection device. A cylindrical cam 43 is also provided at the upper end of the main shaft 41. A cam follower 44 is also fixed on the frame 1. The cam follower 44 cooperates with the cylindrical cam 43 to form a cylindrical cam 43 mechanism, enabling the main shaft 41 to periodically rise and fall. One end of the cleaning brush 42 is fixed to the lower end of the main shaft 41. The cleaning brush 42 is arranged in accordance with the rising and falling cycle of the main shaft 41, so that the other end of the cleaning brush 42 extends towards the side of the main shaft 41 away from the height difference measuring sensor 3 during the rising cycle of the main shaft 41. The side of the main shaft 41 away from the elevation difference measuring sensor 3 refers to the side of the main shaft 41 that is farther away from the elevation difference measuring sensor 3 along the width direction of the engineering flatness detection device. When the main shaft 41 rotates, the cylindrical cam 43 mechanism causes the main shaft 41 to periodically rise and fall. Outside the rising cycle of the main shaft 41, the cleaning brush 42 cleans the ground directly in front of the elevation difference measuring sensor 3, sweeping small stones or mud clods away from the area directly in front of the elevation difference measuring sensor 3. During the rising cycle of the main shaft 41, the cleaning brush 42 rises with the main shaft 41 away from the ground, preventing small stones or mud clods from being swept back into the area directly in front of the elevation difference measuring sensor 3, thus reducing the occurrence of the elevation difference measuring sensor 3 passing over small stones or mud clods. It should be noted that the rising cycle of the main shaft 41 includes the process of the main shaft 41 rising and the period during which the main shaft 41 remains in the highest position. In one embodiment, the cam follower 44 is a roller. This reduces wear between the cam follower 44 and the cylindrical cam 43, improving service life.

[0031] In one embodiment, two sets of cleaning brushes 42 and main shafts 41 are arranged on both sides of the height difference measuring sensor 3, and the lifting cycles of the main shafts 41 on both sides of the height difference measuring sensor 3 are opposite. Specifically, the two sets of cleaning brushes 42 and main shafts 41 can be arranged symmetrically on the left and right, or staggered on the left and right. The lifting cycles of the main shafts 41 on both sides can be reversed by setting the engagement position of the cam follower 44 and the cylindrical cam 43. The opposite lifting cycles of the main shafts 41 on both sides of the height difference measuring sensor 3 ensure that at least one cleaning brush 42 is in a state of cleaning the ground directly in front of the height difference measuring sensor 3, thus improving the cleaning effect. Furthermore, the main shaft 41 located in front of the right side of the height difference measuring sensor 3 is arranged to rotate clockwise, and the main shaft 41 located in front of the left side of the height difference measuring sensor 3 is arranged to rotate counterclockwise. Here, clockwise and counterclockwise directions refer to the corresponding directions when looking down at the engineering flatness detection device. It can be understood that the two main shafts 41 can achieve opposite directions through an even number of gear meshing transmissions, etc. The specific implementation method will not be elaborated. By controlling the rotation of the main shaft 41, it is possible to prevent small stones or mud from being swept towards the height difference sensor 3 when the sweeping brush 42 rotates into the area directly in front of the height difference sensor 3, thereby reducing the risk of small stones or mud affecting the flatness detection.

[0032] In one embodiment, the frame 1 is further provided with an elastic support member 45. A support portion 411 is provided on the side wall of the main shaft 41. One end of the elastic support member 45 is connected to the frame 1, and the other end of the elastic support member 45 is connected to the support portion 411. The elastic support member 45 provides an upward elastic force to the support portion 411. Specifically, the elastic support member 45 is a helical spring, with its lower end fixed to the frame 1 and its upper end supporting the support portion 411. In one embodiment, the helical spring is sleeved on the outside of the main shaft 41. A sliding bearing or similar material can be provided on the contact surface between the support portion 411 and the helical spring to reduce frictional damage. The elastic support member 45 still generates an upward elastic force when the main shaft 41 rises, thereby reducing the interaction force between the cam follower 44 and the cylindrical cam 43 in the vertical direction, thus reducing wear and increasing the service life of the cylindrical cam 43 and the cam follower 44.

[0033] In one embodiment, the transmission device 6 includes a first spur gear 61, a second spur gear 62, and a transmission shaft 63. The first spur gear 61 is synchronously rotated with the driven caster 5, and the second spur gear 62 is synchronously rotated with the main shaft 41. The transmission shaft 63 is rotatably mounted on the frame 1, and its two ends are respectively provided with crown gears that mesh with the first spur gear 61 and the second spur gear 62. It is understood that the transmission device 6 needs to convert the horizontal rotation of the driven caster 5 into the vertical rotation of the main shaft 41. This can be achieved using bevel gears, worm gears, etc. To accommodate the vertical sliding of the main shaft 41, the corresponding transmission components can be slidably mounted on the main shaft 41. The rotation and sliding of the main shaft 41 can be achieved by using splines, flat keys, etc., in conjunction with the main shaft 41. In one embodiment, the main shaft 41 is provided with splines, and the second spur gear 62 is slidably fitted onto the splines. Specifically, the frame is provided with a limiting part, which allows the second spur gear 62 to slide within a limited area relative to the main shaft 41.

[0034] Working principle: When the flatness detection device is in operation, it is moved manually or by vehicle. The driven caster 5 rotates due to friction with the bottom surface, and drives the rotary cleaning device 4 through the transmission device 6 to clean the ground in front of the height difference measuring sensor 3. This reduces the chance of the height difference measuring sensor 3 passing over small stones or mud, improving the accuracy of flatness detection. At the same time, the rotary cleaning device 4 does not require an additional motor or engine, and does not require additional power or fuel, making it convenient to use.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A flatness testing device for engineering applications, comprising a frame, wheels, and a height difference measurement sensor, characterized in that, The frame is also equipped with a rotary cleaning device, driven casters and a transmission device. The rotary cleaning device is positioned in front of the height difference measuring sensor, and the driven casters are rotatably mounted on the frame. When the engineering flatness detection device moves, it can cause the driven casters to rotate by friction with the ground. The transmission device drives and connects the driven casters and the rotary cleaning device. The rotary cleaning device includes a horizontally arranged cleaning brush and a vertically arranged main shaft. The main shaft is rotatably and slidably mounted on the frame, and is biased towards the side of the height difference measuring sensor. A cylindrical cam is also provided at the upper end of the main shaft, and a cam follower is fixed on the frame. The cam follower cooperates with the cylindrical cam to form a cylindrical cam mechanism, enabling the main shaft to periodically rise and fall. One end of the cleaning brush is fixed to the lower end of the main shaft, and the cleaning brush is arranged in accordance with the rising and falling cycle of the main shaft, so that the other end of the cleaning brush extends towards the side of the main shaft away from the height difference measuring sensor during the rising cycle of the main shaft. The cleaning brush and the main shaft are arranged in two sets on both sides of the height difference measurement sensor. The lifting cycles of the main shafts on both sides of the height difference measurement sensor are opposite. The main shaft located in front of the right side of the height difference measurement sensor rotates clockwise, and the main shaft located in front of the left side of the height difference measurement sensor rotates counterclockwise.

2. The engineering flatness testing device according to claim 1, characterized in that, The frame is also provided with an elastic support member, and the side wall of the spindle is provided with a support part. One end of the elastic support member is connected to the frame, and the other end of the elastic support member is connected to the support part. The elastic support member provides an upward elastic force to the support part.

3. The engineering flatness testing device according to claim 2, characterized in that, The elastic support is a helical spring, with the lower end of the helical spring fixed to the frame and the upper end of the helical spring supporting the support portion.

4. The engineering flatness testing device according to claim 1, characterized in that, The cam follower is a roller.

5. The engineering flatness testing device according to claim 1, characterized in that, The transmission device includes a first spur gear, a second spur gear, and a transmission shaft. The first spur gear is synchronously rotated with the driven caster, and the second spur gear is synchronously rotated with the main shaft. The transmission shaft is rotatably mounted on the frame, and crown gears are respectively provided at both ends of the transmission shaft to mesh with the first spur gear and the second spur gear.

6. The engineering flatness testing device according to claim 5, characterized in that, The main shaft is provided with a spline, and the second spur gear is slidably sleeved on the spline.

7. The engineering flatness testing device according to claim 1, characterized in that, The driven caster is one or more of the traveling wheels.

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