A deflection measuring device for highway detection

Abstract

The application discloses a deflection measuring device for highway detection, which comprises a support and a base, a rear lever is rotatably connected to the support, a front lever is connected to one side of the rear lever through a connecting piece, the connecting piece is used to enable the front lever to rotate to a required position relative to the rear lever, a testing head is arranged at the bottom of the front lever, and a measuring dial assembly is arranged on the base through a supporting piece. When the deflection measuring device is used, the front lever and the rear lever can be unfolded by rotating a rotating rod, so that the deflection measuring device can be conveniently and quickly used, and vice versa, the front lever and the rear lever can be folded by reversely rotating the rotating rod, so that the deflection measuring device can be conveniently folded and stored, and a user can conveniently and quickly operate.

Description

Technical Field

[0001] This invention relates to the field of highway inspection technology, specifically to a deflection measuring device for highway inspection. Background Technology

[0002] To ensure higher quality highways, it is necessary to test highway data. Among them, deflection is one of the important technical indicators for evaluating the quality of highway design and engineering. Currently, the Benkelman beam, also known as the pavement deflectometer, is mainly used to measure the deflection value of the highway through the front and rear levers and fulcrum.

[0003] Existing highway deflection measuring devices are very long to achieve better measurement results. Furthermore, to ensure proper storage, the front and rear levers are assembled before use, secured with bolts. This assembly and disassembly is inconvenient, requiring tools to rotate multiple bolts before the device can be used and stored, thus affecting its effectiveness. Therefore, we propose a new deflection measuring device for highway inspection. Summary of the Invention

[0004] The purpose of this invention is to provide a deflection measuring device for highway testing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A deflection measuring device for highway testing includes a support and a base. A rear lever is connected to a rotating shaft on the support. A front lever is connected to one side of the rear lever via a connector. The connector allows the front lever to rotate relative to the rear lever to a desired position. A test head is provided at the bottom of the front lever. The base is located on one side of the rear lever, and a measuring dial assembly is provided on the base via a support.

[0007] A further improvement is that the connecting component includes a connecting block located on one side of the rear lever, a rotating rod rotatably mounted through the connecting block, a front lever fixedly sleeved on the outer wall of the rotating rod, a positioning block sleeved at one end of the rotating rod, a movable spring between the positioning block and the rotating rod, the positioning block slidingly connecting with a sliding block fixed on the outer wall of the rotating rod via a groove on its inner wall, an upper gear ring on the side of the positioning block facing the connecting block, and a lower gear ring on the connecting block for meshing with the upper gear ring, the meshing of the upper and lower gear rings restricting the rotation of the front lever relative to the rear lever via the rotating rod.

[0008] A further improvement is that a positioning rod is provided on one side of the rear lever, and a positioning port for inserting the positioning rod is provided on the front lever. Both sides of the end of the positioning rod away from the rear lever are movably inserted with locking blocks, and a telescopic spring is provided between the two sets of locking blocks.

[0009] The locking block is used to limit the front lever after one end of the positioning rod passes through the positioning port.

[0010] A further improvement is that the support includes a support frame mounted on the base, a telescopic rod is provided between the support frame and the base, a mounting frame is fitted on the outer wall of the support frame, and the measuring dial assembly is mounted on the mounting frame;

[0011] A turntable is installed inside the base. The outer wall of the turntable has multiple sets of spiral grooves arranged in a circular array. A slider is slidably installed in the spiral grooves. A limiting opening is horizontally opened at the top of the base corresponding to the position of the spiral groove for the slider to pass through. The spiral groove is used to drive the slider to move towards or away from the center of the turntable along the corresponding limiting opening. One end of the bracket is hinged to the top of the slider, and a movable block is hinged to the other end of the bracket. The movable block is fixed to the outer wall of the support frame. A pull rod that penetrates the side wall of the base is hinged to one side of the turntable. An arc-shaped opening is opened on the side wall of the base for the pull rod to drive the turntable to rotate.

[0012] A further improvement is that the height of the arc-shaped opening is greater than the diameter of the pull rod, an elastic element is provided between the pull rod and the inner wall of the arc-shaped opening, a locking tooth is provided at the bottom of the pull rod, and an arc-shaped toothed rack is provided at the bottom inner wall of the arc-shaped opening for engaging with the locking tooth.

[0013] A further improvement is that a top rod is integrally provided on the measuring dial, the top rod is movably inserted into the mounting bracket, a protrusion is integrally provided on one side of the top rod, a through hole is provided through the mounting bracket to accommodate the top rod and the protrusion, and a mounting cavity communicating with the through hole is provided inside the mounting bracket and on one side of the through hole, and a fixing member for fixing the top rod is provided in the mounting cavity.

[0014] A further improvement is that the fixing component includes a bidirectional screw rod rotatably disposed in the mounting cavity, one end of the bidirectional screw rod passing through the mounting bracket, and threaded sleeves threaded on both sides of the outer wall of the bidirectional screw rod. A movable rod is hinged to the side of the two sets of threaded sleeves facing the top rod, and the other end of the two sets of movable rods is hinged to a concave seat for engaging with the protrusion. The concave seat is slidably disposed in the mounting cavity.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When using this invention, the front lever and the rear lever can be unfolded by rotating the rotating rod, which makes it convenient and quick to use. Conversely, the front lever and the rear lever can be folded by rotating the rotating rod in the opposite direction, which makes it convenient to fold and store the deflection measuring device and facilitates quick operation by the user.

[0017] 2. This invention uses a pull rod to drive a turntable to rotate, which in turn drives a slider to slide. The slider then drives the support to move via a rotating shaft, thereby changing the support angle of the support frame. The support can provide auxiliary support for the measuring dial, ensuring the stability of the measuring dial during use.

[0018] 3. This invention can rotate the bidirectional screw, causing the screw sleeve to drive the movable rod to rotate, and causing the limiting block and the protrusion to separate, so that the measuring dial can be replaced. Conversely, the measuring dial can be fixed to one side of the fixing frame by the limiting block and the protrusion, without affecting the normal use by the user. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the measuring dial structure in this invention;

[0021] Figure 3 This is a schematic diagram of the connector structure in this invention;

[0022] Figure 4 For the present invention Figure 3 A partial structural sectional view in the image;

[0023] Figure 5 This is a schematic diagram of the positioning rod structure in this invention;

[0024] Figure 6 This is a schematic diagram of the spiral groove structure in this invention;

[0025] Figure 7 This is a schematic diagram of the limiting port structure in this invention;

[0026] Figure 8 This is a schematic diagram of the meshing structure of the toothed teeth and the arc-shaped rack in this invention;

[0027] Figure 9 This is a schematic diagram of the arc-shaped rack structure in this invention;

[0028] Figure 10 This is a schematic diagram of the fastener structure in this invention.

[0029] In the diagram: 1. Support; 2. Rear lever; 3. Connecting block; 4. Rotating rod; 5. Front lever; 6. Test head; 7. Measuring dial; 8. Mounting bracket; 9. Support frame; 10. Telescopic rod; 11. Base; 12. Positioning block; 13. Movable spring; 14. Sliding block; 15. Upper gear ring; 16. Lower gear ring; 17. Positioning rod; 18. Telescopic spring; 19. Locking block; 20. Turntable; 21. Spiral groove; 22. Slider; 23. Bracket; 24. Movable block; 25. Pull rod; 26. Elastic element; 27. Locking tooth; 28. Arc-shaped rack; 29. ​​Bidirectional screw; 30. Screw sleeve; 31. Movable rod; 32. Concave seat; 33. Protrusion; 34. Top rod; 35. Limiting port. Detailed Implementation

[0030] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please see the appendix Figure 1 - Appendix Figure 4

[0033] A deflection measuring device for highway testing includes a support 1 and a base 11. A rear lever 2 is connected to a rotating shaft on the support 1. A front lever 5 is connected to one side of the rear lever 2 via a connector. The connector is used to allow the front lever 5 to rotate relative to the rear lever 2 to the desired position. A test head 6 is provided at the bottom of the front lever 5. The base 11 is located on one side of the rear lever 2 and a measuring dial assembly is provided on the base 11 via a support.

[0034] Preferably, the connector in this embodiment includes a connecting block 3 located on one side of the rear lever 2, and the connecting block 3 and the rear lever 2 are an integral structure; a rotating rod 4 is rotatably mounted through the connecting block 3, and the rotating rod 4 is connected to the connecting block 3 through a bearing; a front lever 5 is fixedly sleeved on the outer wall of the rotating rod 4, and the connecting block 3 forms a rotating structure with the front lever 5 through the rotating rod 4; a positioning block 12 is sleeved on one end of the rotating rod 4, and a movable spring 13 is provided between the positioning block 12 and the rotating rod 4; the positioning block 12 is slidably connected to the sliding block 14 fixed on the outer wall of the rotating rod 4 through a sliding groove opened in its inner wall; an upper gear ring 15 is provided on the side of the positioning block 12 facing the connecting block 3, and a lower gear ring 16 is provided on the connecting block 3 for meshing with the upper gear ring 15; the meshing of the upper gear ring 15 and the lower gear ring 16 restricts the rotation of the front lever 5 relative to the rear lever 2 through the rotating rod 4.

[0035] In practical implementation, when the front lever 5 of the highway deflection measuring device needs to be folded, the positioning block 12 can be pulled upwards. This causes the positioning block 12 to slide upwards via the sliding block 14 on the outside of the rotating rod 4. The upward movement of the positioning block 12 separates the upper gear ring 15 on the positioning block 12 from the lower gear ring 16 on the connecting block 3. Simultaneously, the rotating rod 4 is connected to the connecting block 3 via a bearing. Without the meshing connection between the upper gear ring 15 and the lower gear ring 16, the front lever 5 can rotate via the rotating rod 4, simultaneously rotating the positioning block 12. When the rotating rod 4 rotates the front lever 5... After rotating to the appropriate angle, the positioning block 12 can be released, allowing the movable spring 13 connecting the positioning block 12 and the rotating rod 4 to reset. The positioning block 12 will then move downwards, engaging the upper gear ring 15 on the positioning block 12 with the lower gear ring 16 on the connecting block 3. The meshing of the upper gear ring 15 and the lower gear ring 16 will limit the rotation of the rotating rod 4. When the deflection measuring device needs to be transported and folded, the front lever 5 and the rear lever 2 can be folded by rotating the rod 4, thereby reducing the placement space of the entire deflection measuring device, making it easier to store and fold, and facilitating the storage and transportation of the entire deflection measuring device.

[0036] Please see the appendix Figure 5

[0037] Preferably, in this embodiment, a positioning rod 17 is provided on one side of the rear lever 2, and a positioning port for the positioning rod 17 to be inserted is provided on the front lever 5. Both sides of the end of the positioning rod 17 away from the rear lever 2 are movably inserted with a locking block 19, and a telescopic spring 18 is provided between the two sets of locking blocks 19.

[0038] The locking block 19 is used to limit the front lever 5 after it rotates so that one end of the positioning rod 17 passes through the positioning port.

[0039] In practice, the rotating rod 4 drives the front lever 5 to rotate. After the front lever 5 rotates to one side of the rear lever 2, the positioning rod 17 passes through the insertion hole of the rear lever 2. After the positioning rod 17 passes through the insertion hole of the rear lever 2, the telescopic spring 18 drives the locking block 19 to reset. Thus, the locking block 19 can limit and fix the front lever 5 and the rear lever 2, making the front lever 5 and the rear lever 2 more firmly fixed. The front lever 5 and the rear lever 2 can then be unfolded for convenient and quick use.

[0040] Please see the appendix Figure 6 - Appendix Figure 9

[0041] As a preferred embodiment, the support member includes a support frame 9 disposed on the base 11, a telescopic rod 10 is provided between the support frame 9 and the base 11, a mounting frame 8 is sleeved on the outer wall of the support frame 9, and a measuring dial assembly is disposed on the mounting frame 8.

[0042] A turntable 20 is installed inside the base 11. The outer wall of the turntable 20 has multiple sets of spiral grooves 21 arranged in a circular array. A slider 22 slides within each spiral groove 21. A limiting opening 35 is horizontally provided at the top of the base 11 corresponding to the position of the spiral groove 21, allowing the slider 22 to pass through. The spiral grooves 21 drive the slider 22 to move along the corresponding limiting opening 35 towards or away from the center of the turntable 20. One end of a bracket 23 is hinged to the top of the slider 22. Figure 5 - Appendix Figure 6 It can be seen that three sets of sliders 22 are installed about the center line of the base 11; the other end of the bracket 23 is hinged to a movable block 24, which is fixed to the outer wall of the support frame 9; a pull rod 25 that passes through the side wall of the base 11 is hinged to one side of the turntable 20; and an arc-shaped opening is provided on the side wall of the base 11 for the pull rod 25 to drive the turntable 20 to rotate.

[0043] In practical implementation, the highway inspection deflection measuring device, when in use, rotates the pull rod 25, causing the turntable 20 to rotate. The rotation of the turntable 20 causes the spiral groove 21 to rotate, and the rotation of the spiral groove 21 causes the slider 22 to slide linearly within the limiting port 35 through the rotation of the spiral groove 21. This changes the distance between the sliders 22. During the sliding process, the slider 22 drives the support frame 9 to extend and retract through the telescopic rod 10 via the bracket 23, thereby changing the height of the measuring dial 7. This allows for convenient and quick adjustment of the height of the entire measuring dial 7.

[0044] Preferably, in this embodiment, the height of the arc-shaped opening is greater than the diameter of the pull rod 25. An elastic element 26 is provided between the pull rod 25 and the inner wall of the arc-shaped opening. The elastic element 26 is, for example, a compression spring, one end of which is fixedly connected to the top of the pull rod 25, and the other end is slidably connected to the inner wall of the top of the arc-shaped opening. Of course, it is not limited to this type. The elastic element 26 is used to drive the pull rod 25 to rotate and reset. The bottom of the pull rod 25 is provided with a locking tooth 27, and the bottom inner wall of the arc-shaped opening is provided with an arc-shaped rack 28 for cooperating with the locking tooth 27.

[0045] In practice, pulling the lever 25 upwards separates the locking teeth 27 at the bottom of the lever 25 from the arc-shaped rack 28 in the groove of the base 11. Then, the lever 25 can be operated to drive the turntable 20 to rotate. Conversely, releasing the lever 25 allows the elastic element 26 to drive the lever 25 to rotate and reset. The locking teeth 27 at the bottom of the lever 25 then engage with the arc-shaped rack 28, thus limiting the lever 25 and fixing it. This also fixes the turntable 20, without affecting the normal use of the entire measuring dial 7.

[0046] Please see the appendix Figure 10

[0047] Preferably, in this embodiment, the measuring dial 7 is integrally provided with a top rod 34, which is movably inserted into the mounting bracket 8. A protrusion 33 is integrally provided on one side of the top rod 34. A through hole is provided through the mounting bracket 8 to accommodate the top rod 34 and the protrusion 33. A mounting cavity communicating with the through hole is provided inside the mounting bracket 8 and on one side of the through hole. A fixing member for fixing the top rod 34 is provided in the mounting cavity.

[0048] Preferably, the fixing component in this embodiment includes a bidirectional screw 29 rotatably disposed in the mounting cavity. The end of the bidirectional screw 29 is connected to the inner wall of the mounting cavity by a bearing. One end of the bidirectional screw 29 passes through the mounting bracket 8. One end of the bidirectional screw 29 is provided with a handwheel for the user to rotate. Both sides of the outer wall of the bidirectional screw 29 are threaded with screw sleeves 30. The two sets of screw sleeves 30 are hinged to movable rods 31 on the side facing the top rod 34. The other ends of the two sets of movable rods 31 are hinged to concave seats 32 for engaging with protrusions 33. The concave seats 32 are slidably disposed in the mounting cavity.

[0049] In practical implementation, when using this highway inspection deflection measuring device, the double-ended screw 29 can be rotated to cause the two outer sleeves 30 to slide in opposite directions. The sleeves 30 drive the concave seat 32 to move through the movable rod 31, causing the concave seat 32 to separate from the protrusion 33. At this time, the entire measuring dial 7 and the top rod 34 can be removed from the mounting bracket 8, which facilitates quick replacement of the measuring dial 7 and avoids damage to the measuring dial 7, which would affect the measurement results.

[0050] Conversely, during installation, the measuring dial 7 is connected to the mounting bracket 8 via the top rod 34, and then the bidirectional screw 29 is rotated in the opposite direction so that the concave seat 32 is connected to one side of the protrusion 33, thereby fixing the measuring dial 7 in the mounting bracket 8, which facilitates quick fixation of the measuring dial 7.

[0051] In summary, the deflection measuring device for highway testing, when in use, places the entire front lever 5 and rear lever 2 in a stable position via the support 1, then unfolds the front lever 5 and rear lever 2, drives the vehicle to the target point, and positions the test head 6 between the two rear wheels of the vehicle. The measuring dial 7 is then placed on the rear lever 2 via the base 11. As the vehicle moves forward, ensuring its rear wheels are outside the radius of influence, the highway deflection data is obtained from the reading on the measuring dial 7. This is existing technology and will not be elaborated upon further. This is the characteristic of the highway deflection measuring device. Content not described in detail in this specification is existing technology known to those skilled in the art.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deflection measuring device for highway inspection, comprising a support (1) and a base (11), characterized in that: The support (1) has a rotating shaft connected to a rear lever (2), and a front lever (5) is connected to one side of the rear lever (2) via a connector. The connector is used to allow the front lever (5) to rotate relative to the rear lever (2) to the desired position. A test head (6) is provided at the bottom of the front lever (5). The base (11) is located on one side of the rear lever (2), and a measuring dial assembly is provided on the base (11) via a support. The support includes a support frame (9) disposed on the base (11), a telescopic rod (10) is provided between the support frame (9) and the base (11), and an mounting frame (8) is sleeved on the outer wall of the support frame (9), and the measuring dial assembly is disposed on the mounting frame (8). A turntable (20) is installed inside the base (11). The outer wall of the turntable (20) has multiple sets of spiral grooves (21) arranged in a circular array. A slider (22) is slidably arranged in the spiral grooves (21). A limiting opening (35) for the slider (22) to pass through is horizontally opened at the top of the base (11) corresponding to the position of the spiral groove (21). The spiral groove (21) is used to drive the slider (22) along the corresponding limiting opening (35) toward the turntable (20). The center of the circle moves away from or away from the center of the turntable (20). The top of the slider (22) is hinged to one end of the bracket (23), and the other end of the bracket (23) is hinged to a movable block (24). The movable block (24) is fixed on the outer wall of the support frame (9). One side of the turntable (20) is hinged to a pull rod (25) that passes through the side wall of the base (11). The side wall of the base (11) is provided with an arc-shaped opening for the pull rod (25) to drive the turntable (20) to rotate. The measuring dial (7) is integrally provided with a top rod (34), which is movably inserted into the mounting bracket (8). A protrusion (33) is integrally provided on one side of the top rod (34). The mounting bracket (8) is provided with a through hole for accommodating the top rod (34) and the protrusion (33). The mounting bracket (8) is provided with a mounting cavity communicating with the through hole on one side of the through hole. A fixing member for fixing the top rod (34) is provided in the mounting cavity. The fixing component includes a bidirectional screw (29) rotatably disposed in the mounting cavity. One end of the bidirectional screw (29) passes through the mounting bracket (8). Both sides of the outer wall of the bidirectional screw (29) are threaded with screw sleeves (30). The two sets of screw sleeves (30) are hinged to movable rods (31) on the side facing the top rod (34). The other ends of the two sets of movable rods (31) are hinged to a concave seat (32) for engaging with the protrusion (33). The concave seat (32) is slidably disposed in the mounting cavity.

2. The deflection measuring device according to claim 1, characterized in that: The connector includes a connecting block (3) located on one side of the rear lever (2). A rotating rod (4) is rotatably mounted on the connecting block (3). A front lever (5) is fixedly mounted on the outer wall of the rotating rod (4). A positioning block (12) is mounted on one end of the rotating rod (4). A movable spring (13) is provided between the positioning block (12) and the rotating rod (4). The positioning block (12) is slidably connected to a sliding block (14) fixed on the outer wall of the rotating rod (4) through a groove opened on its inner wall. An upper gear ring (15) is provided on the side of the positioning block (12) facing the connecting block (3). A lower gear ring (16) is provided on the connecting block (3) for meshing with the upper gear ring (15). The meshing of the upper gear ring (15) and the lower gear ring (16) restricts the front lever (5) from rotating relative to the rear lever (2) through the rotating rod (4).

3. The deflection measuring device according to claim 1, characterized in that: A positioning rod (17) is provided on one side of the rear lever (2), and a positioning port for the positioning rod (17) to be inserted is provided on the front lever (5). Both sides of the end of the positioning rod (17) away from the rear lever (2) are movably inserted with locking blocks (19), and a telescopic spring (18) is provided between the two sets of locking blocks (19). The locking block (19) is used to limit the front lever (5) after one end of the positioning rod (17) passes through the positioning port.

4. The deflection measuring device according to claim 1, characterized in that: The height of the arc-shaped opening is greater than the diameter of the pull rod (25). An elastic element (26) is provided between the pull rod (25) and the inner wall of the arc-shaped opening. A locking tooth (27) is provided at the bottom of the pull rod (25). An arc-shaped rack (28) for cooperating with the locking tooth (27) is provided on the bottom inner wall of the arc-shaped opening.

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