Asphalt pavement thickness measuring device

Abstract

This utility model belongs to the technical field of asphalt thickness measuring devices, specifically relating to an asphalt pavement paving thickness measuring device. It includes an outer shell, a through hole at the center of the base, a measuring rod slidably disposed within the through hole, and an adjustment assembly connected to the outer shell. The adjustment assembly includes a gear rotatably disposed on the top surface of the outer shell, with racks meshing on both sides of the gear. The two racks move relative to each other, and a movable plate slidably disposed within a connecting seat is connected to the bottom surface of one opposite end of the rack. Connecting rods are fixedly disposed on opposite sides of the bottom surface of the movable plate, and the connecting rods are slidably disposed within a mounting seat. A sliding plate is connected to the end of the connecting rod furthest from the movable plate. Limiting blocks are fixedly disposed on opposite sides of both sliding plates, and the limiting blocks engage with limiting grooves on both sides of the measuring rod. This invention solves the problem that existing measuring devices require operators to bend over to read values, and when the line of sight is not perpendicular to the scale or the lighting is complex, readings are prone to deviation.

Description

Technical Field

[0001] This utility model belongs to the technical field of asphalt thickness measuring devices, specifically relating to an asphalt pavement paving thickness measuring device. Background Technology

[0002] The thickness of asphalt pavement is a core indicator affecting the pavement's load-bearing capacity, smoothness, and service life. It needs to be measured accurately in real time during the paving process to ensure that the construction quality meets the design standards.

[0003] The scales of existing measuring devices are mostly marked on the side of the measuring rod, and the measuring rod needs to be inserted into the asphalt layer to read the value. At this time, the main body of the device can easily block the scale, and the operator has to bend over or look to the side to read the value. The line of sight is not perpendicular to the scale surface, which can easily lead to reading deviation due to parallax. This problem is more prominent when the lighting at the paving site is complicated. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide an asphalt pavement paving thickness measuring device, which solves the problem that existing measuring devices are prone to reading deviations when operators bend over to read values, and when the line of sight is not perpendicular to the scale or the lighting is complex.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an asphalt pavement paving thickness measuring device, comprising an outer shell, the bottom surface of which is connected to the top surface of a connecting seat, the bottom surface of which is connected to the top surface of a mounting seat, a base fixedly mounted on the bottom surface of the mounting seat, a through hole penetrating the center of the base, a measuring rod slidably mounted within the through hole, and an adjusting assembly connected to the measuring rod on the outer shell. The adjusting assembly includes a gear rotatably mounted on the top surface of the outer shell, racks meshing on both sides of the gear, the two racks moving relative to each other, a movable plate slidably mounted within the connecting seat connecting one end of each rack, a connecting rod fixedly mounted on opposite sides of the movable plate, the connecting rod slidably mounted within the mounting seat, a sliding plate connecting the end of the connecting rod away from the movable plate, and a limiting block fixedly mounted on one side of each of the two sliding plates, the limiting block fitting into limiting grooves on both sides of the measuring rod.

[0006] The beneficial effects of this utility model are: The device is equipped with an adjustment component. When the base is in contact with the road surface and the measuring rod touches the base layer, rotating the internal thread cover will drive the limiting block to press and embed into the limiting groove of the measuring rod, thus completely fixing the measuring rod and preventing slight movement of the measuring rod caused by vibration. At this time, the scale and the position of the reference surface are completely fixed, and the operator does not need to worry about dynamic reading deviation.

[0007] To ensure precise engagement between the limiting block and the limiting groove: As a further improvement to the above technical solution: the shaft fixed on the top surface of the gear passes through the top surface of the rotatably connected housing, and a dynamic sealing ring is provided at the connection between the shaft on the top surface of the gear and the housing. A telescopic rod is fixed at the end of the shaft on the top surface of the gear. The telescopic section end of the telescopic rod is connected to the inner top surface of the internal thread cover. The internal thread cover is fitted on the outside of the external thread cylinder and threadedly connected to it. The external thread cylinder is fixed on the top surface of the housing.

[0008] The beneficial effects of this improvement are: the threaded fit between the internal threaded cap and the external threaded cylinder can realize the micro-rotation adjustment of the gear, thereby accurately controlling the movement distance of the rack, ensuring the precise engagement position of the limit block and the limit groove, and improving the positioning accuracy of the measuring rod.

[0009] To ensure that the rack always meshes precisely with the gear: As a further improvement to the above technical solution: guide rods are fixedly provided on both sides of the inner side of the outer shell. The axis of the guide rod is parallel to the moving direction of the rack, and the guide rod passes through the limiting sleeve fixedly connected to the end of the rack and slides with it.

[0010] The beneficial effects of this improvement are: the guide rod can prevent the rack from tilting or deviating during movement, ensuring that the rack is always precisely meshed with the gear, and avoiding adjustment jamming or transmission failure caused by changes in meshing clearance.

[0011] To ensure that the movable plate moves only in the direction of approaching or moving away from the measuring rod: As a further improvement to the above technical solution: sliding windows are provided on both sides of the connecting seat, and guide protrusions are provided on the inner walls of both sides of the sliding windows. Guide grooves adapted to the guide protrusions are provided on both sides of the movable plate, and the guide protrusions and guide grooves are slidably engaged.

[0012] The beneficial effects of this improvement are: by cooperating with the guide convex strip and the guide groove, it is ensured that the movable plate moves only in the direction close to or away from the measuring rod, thus avoiding the movable plate from deflecting within the connecting seat.

[0013] To ensure that the sliding direction of the measuring rod is perpendicular to the bottom surface of the base: As a further improvement to the above technical solution: a telescopic cavity for sliding of the measuring rod is provided through the center of the mounting base, and the telescopic cavity is coaxially arranged with the through hole. Guide through holes for sliding of the connecting rod are symmetrically provided on both sides of the telescopic cavity. The beneficial effects of this improvement are: the coaxial design ensures that the sliding direction of the measuring rod is perpendicular to the bottom surface of the base, and the guide through hole limits the sliding direction of the connecting rod.

[0014] To ensure that the limiting block can smoothly penetrate into the through hole and engage with the limiting groove: As a further improvement to the above technical solution: the base has movable cavities on both sides for the sliding plate to slide, the movable cavities are located on both sides of the through hole, and the movable cavities have movable windows through which the limiting block can move through the inner wall of the through hole.

[0015] The beneficial effects of this improvement are: the sliding range of the slide plate is constrained by the movable cavity, and the movable window ensures that the limiting block can smoothly pass through the through hole and fit into the limiting groove.

[0016] To mitigate the impact force when the limiting block and the limiting groove are engaged: As a further improvement to the above technical solution, the inner wall of the limiting groove is provided with a rubber pad.

[0017] The beneficial effects of this improvement are: the rubber pad can alleviate the impact force when the limiting block and the limiting groove are engaged, and at the same time, it can increase the friction force and enhance the contact characteristics of the two.

[0018] To achieve automatic reset of the measuring rod: As a further improvement to the above technical solution: a spring is fixed at the center of the bottom surface of the connecting seat, and the bottom end of the spring is connected to the top end of the measuring rod.

[0019] The beneficial effect of this improvement is that the measuring rod is automatically reset by using a spring, reducing manual operation steps.

[0020] In summary, the beneficial effects of this case are as follows: The device is equipped with an adjustment component. When the base is in contact with the road surface and the measuring rod touches the base layer, rotating the internal thread cover will drive the limiting block to press and embed into the limiting groove of the measuring rod, thus completely fixing the measuring rod and preventing slight movement of the measuring rod caused by vibration. At this time, the scale and the position of the reference surface are completely fixed, and the operator does not need to worry about dynamic reading deviation.

[0021] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the guide rod structure of this utility model; Figure 4 This is a schematic diagram of the base structure of this utility model; Figure 5 This is a schematic diagram of the mounting base structure of this utility model; Figure 6 This is a schematic diagram of the connector structure of this utility model; In the diagram: 1. Outer shell; 2. Connecting seat; 3. Mounting seat; 301. Telescopic cavity; 302. Guide through hole; 4. Adjustment component; 401. Internal threaded cover; 402. External threaded cylinder; 403. Telescopic rod; 404. Gear; 405. Slide plate; 406. Limiting block; 407. Spring; 408. Rack; 409. Guide rod; 410. Movable plate; 411. Connecting rod; 412. Limiting block; 5. Measuring rod; 501. Limiting groove; 6. Base; 601. Movable cavity; 602. Through hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0024] like Figure 1-6 As shown, the asphalt pavement paving thickness measuring device includes an outer shell 1. The bottom surface of the outer shell 1 is connected to the top surface of a connecting seat 2. The bottom surface of the connecting seat 2 is connected to the top surface of a mounting seat 3. A base 6 is fixedly mounted on the bottom surface of the mounting seat 3. A through hole 602 is formed at the center of the base 6. A measuring rod 5 is slidably disposed within the through hole 602. The measuring rod 5 is connected to an adjusting assembly 4 disposed on the outer shell 1. The adjusting assembly 4 includes a gear 404 rotatably disposed on the top surface inside the outer shell 1. Both sides of the gear 404 are... The two sets of racks 408 are engaged and move relative to each other. The bottom surface of the opposite end of the racks 408 is connected to a movable plate 410 that is slidably disposed in the connecting seat 2. The bottom surfaces of the movable plates 410 are fixed with connecting rods 411 at opposite positions, and the connecting rods 411 are slidably disposed in the mounting seat 3. The end of the connecting rod 411 away from the movable plate 410 is connected to a sliding plate 405. The opposite side of the two sets of sliding plates 405 is fixed with a limiting block 412. The limiting block 412 is fitted into the limiting grooves 501 opened on both sides of the measuring rod 5.

[0025] The shaft fixed to the top surface of the gear 404 passes through and rotatably connects to the top surface of the outer casing 1. A dynamic sealing ring is provided at the connection between the shaft on the top surface of the gear 404 and the outer casing 1. A telescopic rod 403 is fixed to the end of the shaft on the top surface of the gear 404. The telescopic section end of the telescopic rod 403 is connected to the inner top surface of the internal threaded cover 401. The internal threaded cover 401 is fitted onto the outside of the external threaded cylinder 402 and threadedly connected to it. The external threaded cylinder 402 is fixed to the top surface of the outer casing 1. The threaded engagement between the internal threaded cover 401 and the external threaded cylinder 402 enables micro-rotation adjustment of the gear 404, thereby precisely controlling the movement distance of the rack 408, ensuring the precise engagement position of the limiting block 412 and the limiting groove 501, and improving the positioning accuracy of the measuring rod 5.

[0026] Guide rods 409 are fixedly provided on both sides of the inner side of the outer casing 1. The axis of the guide rods 409 is parallel to the moving direction of the rack 408, and the guide rods 409 pass through the limiting sleeve fixedly connected to the end of the rack 408 and slide with it. The guide rods 409 can prevent the rack 408 from tilting or deviating when moving, ensuring that the rack 408 always meshes precisely with the gear 404, and avoiding adjustment jamming or transmission failure caused by changes in meshing clearance.

[0027] The connecting seat 2 has sliding windows on both sides, and guide protrusions are provided on the inner walls of the sliding windows. The movable plate 410 has guide grooves on both sides that are adapted to the guide protrusions. The guide protrusions and guide grooves are slidably engaged. Through the cooperation of the guide protrusions and guide grooves, it is ensured that the movable plate 410 moves only in the direction of approaching or moving away from the measuring rod 5, so as to avoid the movable plate 410 deflecting within the connecting seat 2.

[0028] The center of the mounting base 3 is provided with a telescopic cavity 301 for the measuring rod 5 to slide through, and the telescopic cavity 301 is coaxially arranged with the through hole 602. The two sides of the telescopic cavity 301 are symmetrically provided with guide through holes 302 for the connecting rod 411 to slide through. The coaxial design ensures that the sliding direction of the measuring rod 5 is perpendicular to the bottom surface of the base 6, and the guide through holes 302 limit the sliding direction of the connecting rod 411.

[0029] The base 6 has movable cavities 601 on both sides for sliding of the slide plate 405. The movable cavities 601 are located on both sides of the through hole 602, and the inner wall of the movable cavity 601 near the through hole 602 has a movable window for the limiting block 412 to move through. The movable cavity 601 restricts the sliding range of the slide plate 405, and the movable window ensures that the limiting block 412 can smoothly pass through the through hole 602 and fit into the limiting groove 501.

[0030] The inner wall of the limiting groove 501 is provided with a rubber pad; the rubber pad can alleviate the impact force when the limiting block 412 and the limiting groove 501 are engaged, and at the same time increase the friction force to enhance the contact characteristics of the two.

[0031] A spring 407 is fixed at the center of the bottom surface of the connecting seat 2, and the bottom end of the spring 407 is connected to the top end of the measuring rod 5; the spring 407 realizes the automatic reset of the measuring rod 5, reducing manual operation steps.

[0032] The working principle and usage process of this utility model are as follows: The device is slowly lowered above the asphalt pavement to be measured, so that the bottom end of the measuring rod 5 first contacts the pavement surface. The device is then lowered further. The measuring rod 5, resisted by the ground support force, slides upward relative to the base 6 along the through hole 602 and the telescopic cavity 301. At this time, the top end of the measuring rod 5 compresses the spring 407 on the bottom surface of the connecting seat 2. The spring 407 gradually compresses. The device is lowered continuously until the bottom surface of the base 6 is completely in contact with the asphalt pavement surface. The device remains stable and without tilting, and the measuring rod 5 partially retracts. Returning to the base 6 and mounting base 3, the surface scale changes with the retraction distance. Then, the user rotates the inner thread cover 401 clockwise. The inner thread cover 401 moves downward along the outer thread cylinder 402, causing the telescopic rod 403 to extend and retract, and driving the gear 404 to rotate clockwise on the top surface inside the outer casing 1. When the gear 404 rotates, it drives the meshing racks 408 on both sides to move relative to each other along the guide rod 409 towards the gear 404. The movement of the racks 408 causes the movable plate 410 inside the connecting base 2 to slide. The side guide groove moves along the guide protrusion on the inner wall of the sliding window of the connecting seat 2. The movable plate 410 pushes the sliding plate 405 in the mounting seat 3 and base 6 to slide towards the through hole 602 via the connecting rod 411. The sliding plate 405 drives the limiting block 412 through the movable window of the movable cavity 601, gradually embedding it into the limiting groove 501 of the measuring rod 5 and generating pressure until the limiting block 412 is tightly fitted with the inner wall of the limiting groove 501. The measuring rod 5 is completely fixed and cannot be moved. At this time, the user can pick up the device and observe the surface of the measuring rod 5 and its inner wall. The scale markings on the top surface of the base 6 correspond to the asphalt pavement paving thickness. After the device is used, rotate the inner threaded cover 401 counterclockwise to drive the gear 404 to rotate in the opposite direction. The rack 408 moves away from the gear 404, and the sliding plate 405 is pulled back through the movable plate 410 and the connecting rod 411. The limiting block 412 disengages from the limiting groove 501, releasing the compression limit. The compressed spring 407 releases its elasticity and pushes the measuring rod 5 to slide down along the through hole 602, returning to the initial state.

[0033] All electrical components mentioned in the text are electrically connected to the main controller and power supply. The main controller can be a conventional known device such as a computer that is used for control, and the existing publicly available power connection technology will not be elaborated in the text.

[0034] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of this utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. An asphalt pavement paving thickness measuring device, characterized in that: The system includes an outer shell (1), the bottom surface of which is connected to the top surface of a connecting seat (2), the bottom surface of which is connected to the top surface of a mounting seat (3), and a base (6) fixedly mounted on the bottom surface of the mounting seat (3). A through hole (602) is provided through the center of the base (6), and a measuring rod (5) is slidably disposed in the through hole (602). The measuring rod (5) is connected to an adjusting assembly (4) disposed on the outer shell (1). The adjusting assembly (4) includes a gear (404) rotatably disposed on the top surface inside the outer shell (1), and both sides of the gear (404) are meshed with racks ( 408), two sets of racks (408) move relative to each other. The bottom surface of the opposite end of the rack (408) is connected to a movable plate (410) that is slidably disposed in the connecting seat (2). A connecting rod (411) is fixedly disposed at the opposite bottom surface of the movable plate (410), and the connecting rod (411) is slidably disposed in the mounting seat (3). The end of the connecting rod (411) away from the movable plate (410) is connected to a sliding plate (405). A limiting block (412) is fixedly disposed on the opposite side of the two sets of sliding plates (405). The limiting block (412) fits into the limiting groove (501) opened on both sides of the connecting measuring rod (5).

2. The asphalt pavement paving thickness measuring device according to claim 1, characterized in that: The shaft fixed on the top surface of the gear (404) passes through and rotatably connects to the top surface of the outer shell (1). A dynamic sealing ring is provided at the connection between the shaft on the top surface of the gear (404) and the outer shell (1). A telescopic rod (403) is fixed at the end of the shaft on the top surface of the gear (404). The telescopic section end of the telescopic rod (403) is connected to the inner top surface of the inner thread cover (401). The inner thread cover (401) is fitted on the outside of the outer thread cylinder (402) and threadedly connected to it. The outer thread cylinder (402) is fixed on the top surface of the outer shell (1).

3. The asphalt pavement paving thickness measuring device according to claim 1, characterized in that: Guide rods (409) are fixedly provided on both sides of the inner side of the outer shell (1). The axis of the guide rod (409) is parallel to the moving direction of the rack (408), and the guide rod (409) passes through the limiting sleeve fixedly connected to the end of the rack (408) and slides with it.

4. The asphalt pavement paving thickness measuring device according to claim 1, characterized in that: The connecting seat (2) has sliding windows on both sides, and guide protrusions are provided on the inner walls of both sides of the sliding windows. Guide grooves that are adapted to the guide protrusions are provided on both sides of the movable plate (410). The guide protrusions and guide grooves are slidably engaged.

5. The asphalt pavement paving thickness measuring device according to claim 1, characterized in that: The mounting base (3) has a telescopic cavity (301) through the center for the measuring rod (5) to slide, and the telescopic cavity (301) and the through hole (602) are coaxially arranged. The telescopic cavity (301) has guide through holes (302) symmetrically through the two sides for the connecting rod (411) to slide.

6. The asphalt pavement paving thickness measuring device according to claim 1, characterized in that: The base (6) has movable cavities (601) on both sides for sliding of the sliding plate (405). The movable cavities (601) are located on both sides of the through hole (602), and the movable cavities (601) have movable windows through which the limiting block (412) can move through the inner wall of the through hole (602).

7. The asphalt pavement paving thickness measuring device according to claim 1, characterized in that: The inner wall of the limiting groove (501) is provided with a rubber pad.

8. The asphalt pavement paving thickness measuring device according to claim 1, characterized in that: A spring (407) is fixed at the center of the bottom surface of the connecting seat (2), and the bottom end of the spring (407) is connected to the top end of the measuring rod (5).

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