Flatness measuring instrument with high measuring precision

Abstract

The utility model discloses a flatness measuring instrument with high measuring precision, which particularly relates to the technical field of road surface measurement and comprises a frame, first traveling wheels are arranged at the head and the tail of the lower portion of the frame, a second traveling wheel is arranged below the middle of the frame, and a pair of fixing plates is fixedly connected to the inner side of the frame. Flatness measuring equipment is connected to the pair of fixing plates through screws, one fixing plate is provided with a lifting unit, the lifting unit comprises a hanging bracket and a lifting structure arranged on the hanging bracket, the lifting structure is arranged on the fixing plate, the hanging bracket is provided with a reciprocating linear driving structure, the reciprocating linear driving structure is provided with a rack, and the rack is arranged on the rack. A first gear is connected to the rack in an engaged mode and rotationally connected to one end of the hanging bracket through a rotating shaft. According to the utility model, the problem that when the flatness measuring equipment measures a road surface, the accuracy of measured data of the flatness measuring equipment is influenced when sundries exist on the measured road surface is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of road surface measurement, and more specifically, to a flatness measuring instrument with high measurement accuracy. Background Art

[0002] Flatness is one of the important indicators of road construction quality and service level. Uneven road surface will increase driving resistance and cause additional vibration to vehicles. This vibration will cause driving bumps, affecting driving speed and safety, driving stability and passenger comfort. At the same time, the vibration will also exert impact force on the road surface, thereby aggravating damage to the road surface and car and wear of tires. Uneven road surface will accumulate rainwater and accelerate road damage. Therefore, the detection and evaluation of flatness is a very important part of highway construction and maintenance.

[0003] Patent No. CN220454566U discloses a flatness measuring instrument with high measurement accuracy, which relates to the technical field of flatness measuring instruments, including a mounting frame, the inner wall of the mounting frame is fixedly connected with a placement box, and the flatness measuring instrument body is placed on the inner wall at the bottom of the placement box, and the inner wall at the bottom of the placement box is slidably connected with two clamping seats, and the outer walls on both sides of the placement box are provided with rectangular openings, and the inner walls of the two rectangular openings are slidably connected with threaded blocks, and the four threaded blocks are respectively fixedly connected to the two clamping seats. This application arranges a placement box on the mounting frame, and through the clamping seat arranged in the placement box, the arrangement of the clamping seat facilitates the clamping and fixing of the flatness measuring instrument body, and arranges two bidirectional screws to facilitate the direct driving of the clamping seat to move, so as to facilitate the taking and placing of the flatness measuring instrument body after the measurement is completed, and the cooperation between the hand wheel, the chain and the sprocket wheel facilitates the rapid driving of the two bidirectional screws to rotate.

[0004] In the above patent, the inventor believes that when the patent is in use, the non-contact flatness measuring device is placed on a mobile frame to measure the road surface flatness data. If there are debris on the measured road surface, this will affect the accuracy of the measurement data of the flatness measuring device. Therefore, there is an urgent need for a flatness measuring instrument that can quickly clean up the debris on the ground to ensure the measurement accuracy of the flatness measuring device. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides a flatness measuring instrument with high measurement accuracy. The technical problem to be solved by the utility model is that when the flatness measuring device measures a road surface, if there are debris on the measured road surface, it will affect the accuracy of the measurement data of the flatness measuring device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flatness measuring instrument with high measuring accuracy, comprising a frame, wherein walking wheels 1 are arranged at the front and rear parts of the lower part of the frame, and walking wheels 2 are arranged at the lower part of the middle part of the frame, a pair of fixed plates are fixedly connected to the inner side of the frame, and a flatness measuring device is screwed to the pair of fixed plates, and a lifting unit is arranged on one of the fixed plates, and the lifting unit comprises a hanger and a lifting structure arranged on the hanger, and the lifting structure is arranged on the fixed plate, and a reciprocating linear driving structure is arranged on the hanger, and a rack is arranged on the reciprocating linear driving structure, and a gear 1 is meshed and connected to the rack, and the gear 1 is rotatably connected to one end of the hanger through a rotating shaft, and a cleaning brush is fixedly connected to the rotating shaft of the gear 1, and a speed-increasing transmission structure is arranged on the bottom fixed frame of the frame, and the speed-increasing transmission structure is arranged on the walking wheel 2 and the reciprocating linear driving structure.

[0007] In a preferred embodiment, the lifting structure includes a screw rod threadedly connected to the hanger, a smooth rod movably passing through the hanger, and a handwheel fixedly connected to one end of the screw rod, the screw rod is rotatably connected to the fixed plate, one end of the smooth rod is fixedly connected to the bottom of the fixed plate, and the handwheel is located above the fixed plate.

[0008] In a preferred embodiment, the reciprocating linear drive structure includes a support frame fixedly connected to the hanger, a reciprocating screw rotatably connected to the inner side of the support frame, a sliding seat threadedly connected to the reciprocating screw, and a second light rod fixedly connected to the inner side of the support frame.

[0009] In a preferred embodiment, the second polished rod movably passes through the slide seat, and the rack is fixedly connected to the slide seat.

[0010] In a preferred embodiment, the cleaning brush is made of wear-resistant brush material.

[0011] In a preferred embodiment, the speed increasing transmission structure includes a speed increasing gearbox, gear 2 which is transmission connected to the output shaft of the speed increasing gearbox, and gear 3 which is meshingly connected to gear 2, wherein gear 3 is fixedly connected to one end of the reciprocating screw, and the output shaft of the speed increasing gearbox is fixedly connected to the middle end position of the walking wheel 2.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The utility model is a flatness measuring instrument with high measurement accuracy. A movable walking wheel 2 is used to provide rotational power for an increasing transmission structure. The increasing transmission structure acts on a reciprocating screw by outputting a high speed, which drives the reciprocating linear movement of the rack to cause a transmission gear 1 to perform a reciprocating rotational motion. In this way, a cleaning brush based on the transmission gear 1 can swing back and forth on the path of the measured road surface, thereby effectively cleaning up debris on the road surface and ensuring the accuracy of the flatness data measurement of the flatness measuring equipment.

[0014] 2. The utility model provides a flatness measuring instrument with high measuring accuracy. By setting a lifting unit, the lifting unit can drive the upper structure to realize lifting movement, so that the contact between the cleaning brush and the ground can be flexibly controlled to switch the working state of the cleaning brush. At the same time, because gear two and gear three belong to contact transmission, the cleaning brush with lifting function can be guaranteed to realize effective swing for effective debris cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] Figure 1 It is a schematic structural diagram of the overall first viewing angle of the utility model.

[0017] Figure 2 It is a schematic structural diagram of the overall second viewing angle of the utility model.

[0018] Figure 3 For this utility model Figure 1 Schematic diagram of the structure without frame and flatness measurement equipment.

[0019] Figure 4 It is a schematic structural diagram of the bidirectional linear drive structure and the cleaning brush of the utility model.

[0020] The accompanying drawings are marked as follows: 1. frame; 2. walking wheel one; 3. fixing plate; 4. flatness measuring device; 5. walking wheel two; 6. lifting unit; 61. hanger; 62. screw rod; 63. light rod one; 64. hand wheel; 7. reciprocating linear drive structure; 71. support frame; 72. reciprocating screw rod; 73. slide seat; 74. light rod two; 8. rack; 9. gear one; 10. cleaning brush; 11. speed-increasing transmission structure; 111. speed-increasing gear box; 112. gear two; 113. gear three. DETAILED DESCRIPTION

[0021] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Combined with reference Figure 1-Figure 4 The utility model provides a flatness measuring instrument with high measuring accuracy, including a frame 1, a travel wheel 1 2 is arranged at the front and rear parts of the lower part of the frame 1, and a travel wheel 2 5 is arranged at the lower part of the middle part of the frame 1. In the utility model, the travel wheel 1 2 and the travel wheel 2 5 are both arranged on the frame 1 through a bracket for rotation. A pair of fixing plates 3 are fixedly connected to the inner side of the frame 1, and a flatness measuring device 4 is screwed on the pair of fixing plates 3, which can measure the flatness of the building floor. A lifting unit 6 is arranged on one of the fixing plates 3, and the lifting unit 6 includes a hanger 61 and A lifting structure is arranged on the hanger 61, and the lifting structure is arranged on the fixed plate 3. A reciprocating linear drive structure 7 is arranged on the hanger 61, and a rack 8 is arranged on the reciprocating linear drive structure 7. A gear 9 is meshingly connected to the rack 8. The gear 9 is rotatably connected to one end of the hanger 61 through a rotating shaft. A cleaning brush 10 is fixedly connected to the rotating shaft of the gear 9. The cleaning brush 10 can clean debris on the path of the road to be tested. The bottom fixed frame of the frame 1 is provided with an increasing speed transmission structure 11, and the increasing speed transmission structure 11 is arranged on the walking wheel 2 5 and the reciprocating linear drive structure 7.

[0023] The lifting structure includes a screw rod 62 connected to the hanger 61 by threaded transmission, a smooth rod 63 movably passing through the hanger 61, and a handwheel 64 fixedly connected to one end of the screw rod 62. The screw rod 62 is rotatably connected to the fixed plate 3, one end of the smooth rod 63 is fixedly connected to the bottom of the fixed plate 3, and the handwheel 64 is located above the fixed plate 3. In the utility model, the empty threaded surface of the screw rod 62 can be rotatably connected to the fixed plate 3 through a bearing; the hanger 61 is arranged in a "Z" shape.

[0024] Specifically, by rotating the screw rod 62 forward and backward through the hand wheel 64, the hanger 61 can be adjusted in vertical height on the screw rod 62 under the effect of the light rod 63 providing a guide for the hanger 61, so that the cleaning brush 10 acting on the hanger 61 can conveniently adjust the working state, effectively avoiding long-term contact with the ground and increased wear.

[0025] The reciprocating linear drive structure 7 includes a support frame 71 fixedly connected to the hanger 61, a reciprocating screw 72 rotatably connected to the inner side of the support frame 71, a slide seat 73 threadedly connected to the reciprocating screw 72, and a second light rod 74 fixedly connected to the inner side of the support frame 71.

[0026] The second polished rod 74 movably penetrates the slide 73 , and the rack 8 is fixedly connected to the slide 73 .

[0027] Specifically, by giving rotational power to the reciprocating screw 72, with the light rod 74 providing a sliding guide for the slide 73, the slide 73 can perform reciprocating linear motion on the reciprocating screw 72, so that the rack 8 on the slide 73 can reciprocately mesh with the gear 9, so that the gear 9 can drive the cleaning brush 10 to swing back and forth through the rotating shaft, thereby cleaning the debris on the ground path measured by the flatness measuring device 4.

[0028] The cleaning brush 10 is made of a wear-resistant brush material, such as nylon, which can improve the wear resistance of the cleaning brush 10 when cleaning the floor.

[0029] The speed increasing transmission structure 11 includes a speed increasing gear box 111, a gear 2 112 which is transmission connected to the output shaft of the speed increasing gear box 111, and a gear 3 113 which is meshingly connected to the gear 2 112. The gear 3 113 is fixedly connected to one end of the reciprocating screw 72, and the output shaft of the speed increasing gear box 111 is fixedly connected to the middle end position of the walking wheel 2 5. The speed increasing gear box 111 can be installed on the frame 1 through a support.

[0030] Specifically, when the frame 1 drives the flatness measuring device 4 to perform mobile measurement through the running wheel 1 2 and the running wheel 2 5, the rotating running wheel 2 5 can output a high-speed rotational force through the speed-increasing gear box 111, so that the cleaning brush 10 can perform a relatively high-frequency cleaning swing under the action of the gear 2 112 meshing with the gear 3 113.

[0031] It is worth noting that since the gear 2 112 and the gear 3 113 are connected by contact transmission, it can ensure that the cleaning brush 10 with lifting ability can achieve effective connection transmission.

Claims

1. A flatness measuring instrument with high measurement accuracy, comprising a frame (1), wherein the frame (1) is provided with a first running wheel (2) at both the front and rear parts below the frame (1), and a second running wheel (5) is provided at the lower middle part of the frame (1), characterized in that: A pair of fixed plates (3) are fixedly connected to the inner side of the frame (1), and a flatness measuring device (4) is screwed to the pair of fixed plates (3). A lifting unit (6) is provided on one of the fixed plates (3), and the lifting unit (6) comprises a hanger (61) and a lifting structure arranged on the hanger (61). The lifting structure is arranged on the fixed plate (3). A reciprocating linear drive structure (7) is provided on the hanger (61), and a rack (8) is provided on the reciprocating linear drive structure (7). A gear 1 (9) is meshingly connected to the rack (8), and the gear 1 (9) is rotatably connected to one end of the hanger (61) via a rotating shaft. A cleaning brush (10) is fixedly connected to the rotating shaft of the gear 1 (9). A speed-increasing transmission structure (11) is provided on the bottom fixed frame of the frame (1), and the speed-increasing transmission structure (11) is arranged on the second walking wheel (5) and the reciprocating linear drive structure (7).

2. A flatness measuring instrument with high measurement accuracy according to claim 1, characterized in that: The lifting structure comprises a screw rod (62) connected to the hanger (61) by a threaded transmission, a smooth rod (63) movably passing through the hanger (61), and a hand wheel (64) fixedly connected to one end of the screw rod (62); the screw rod (62) is rotatably connected to the fixed plate (3), one end of the smooth rod (63) is fixedly connected to the bottom of the fixed plate (3), and the hand wheel (64) is located above the fixed plate (3).

3. The flatness measuring instrument with high measurement accuracy according to claim 1, characterized in that: The reciprocating linear drive structure (7) comprises a support frame (71) fixedly connected to the hanger (61), a reciprocating screw (72) rotatably connected to the inner side of the support frame (71), a sliding seat (73) threadedly connected to the reciprocating screw (72), and a second light rod (74) fixedly connected to the inner side of the support frame (71).

4. A flatness measuring instrument with high measurement accuracy according to claim 3, characterized in that: The second polished rod (74) movably passes through the slide seat (73), and the rack (8) is fixedly connected to the slide seat (73).

5. The flatness measuring instrument with high measurement accuracy according to claim 1, characterized in that: The cleaning brush (10) is made of a wear-resistant brush material.

6. The flatness measuring instrument with high measurement accuracy according to claim 3, characterized in that: The speed increasing transmission structure (11) comprises a speed increasing gear box (111), a second gear (112) drivingly connected to an output shaft of the speed increasing gear box (111), and a third gear (113) meshingly connected to the second gear (112), wherein the third gear (113) is fixedly connected to one end of the reciprocating screw (72), and the output shaft of the speed increasing gear box (111) is fixedly connected to the middle end of the second walking wheel (5).

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