A continuous multi-point road surface hardness testing device

Abstract

The present invention belongs to the technical field of hardness detection, and specifically discloses a continuous multi-point road surface hardness detection device, including a travel-driven power storage mechanism, a variable-speed spacing control mechanism, a spring-action actuator, and a mounting assembly, wherein the travel-driven power storage mechanism is arranged on a slide plate, the variable-speed spacing control mechanism is arranged on the travel-driven power storage mechanism, and the spring-action actuator is arranged on the slide plate. The mounting assembly of the present invention can maintain downward pressure on the slide plate, so that when the vehicle itself produces longitudinal undulations, the rolling contact between the rolling wheel and the ground is still maintained; the rolling of the rolling wheel provides power to drive the spring-action actuator to store and release power, which can not only simplify the drive structure, but more importantly, can still maintain the stability of the spacing between the detection points when the vehicle speed fluctuates.

Description

Technical Field

[0001] The invention belongs to the technical field of hardness detection, and specifically refers to a continuous multi-point road surface hardness detection device. Background Art

[0002] The impact method is a commonly used method for testing the surface hardness of concrete. The main principle is to detect the rebound amplitude after the impact and feedback the surface hardness of the measured position. Because the road surface is narrow and constant in width and long in length, the hardness test is generally carried out along the extension direction of the road, and monitoring points with appropriate spacing are selected for testing. The commonly used method is to hang the detection device on the vehicle and move the detection device with the movement of the vehicle.

[0003] This approach is relatively simple, but there are still some problems:

[0004] A: Most vehicles have suspension systems. Therefore, after the detection device is fixed on the frame, it will inevitably produce longitudinal ups and downs with the frame, which can easily cause measurement errors other than the instrument itself.

[0005] B: It is difficult to accurately control the speed of a vehicle, especially when driving uphill or downhill, where the required traction varies. The vehicle speed generally fluctuates slightly. If the frequency of the impact test remains unchanged, the spacing between the measurement points will be unevenly distributed. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a continuous multi-point road hardness detection device that can maintain rolling contact between a rolling wheel and the ground and drive a spring-acting actuator to store and release force through the rolling of the rolling wheel; the downward pressure on the skateboard can be maintained by installing components, so that when the vehicle itself produces longitudinal ups and downs, the rolling contact between the rolling wheel and the ground is still maintained; the rolling of the rolling wheel provides power to drive the spring-acting actuator to store and release force, which not only simplifies the driving structure, but more importantly, it can still maintain the stability of the spacing between the detection points when the vehicle speed fluctuates.

[0007] According to the above scheme, the frequency of the impact detection increases with the increase of the vehicle's speed, but the upper limit of the vehicle's speed is much higher than the upper limit of the frequency of the impact test, and if the machine is stopped for manual adjustment every time the detection distance is adjusted, the operation steps are also slightly complicated. In order to solve the problem that the impact frequency is too fast and the detection point spacing cannot be automatically adjusted after the vehicle speed rises to a certain level, the present invention also creatively proposes an automatic adjustment component on the basis of active adjustment through manual adjustment of the nut. On the one hand, it can solve the problem of too fast impact frequency, and on the other hand, it can adjust the detection distance during the detection process by changing the speed.

[0008] The technical solution adopted by the present invention is as follows: The present invention proposes a continuous multi-point road hardness detection device, including a travel-driven force storage mechanism, a variable speed spacing control mechanism, a spring-actuating actuator and an installation assembly, wherein the travel-driven force storage mechanism is arranged on a slide plate, the variable speed spacing control mechanism is arranged on the travel-driven force storage mechanism, and the spring-actuating actuator is arranged on the slide plate; the travel-driven force storage mechanism includes a lifting bracket, a variable diameter transmission assembly and an elastic retaining assembly, the lifting bracket is arranged on the slide plate, the variable diameter transmission assembly is rotatably arranged on the lifting bracket, and the elastic retaining assembly is arranged on the variable diameter transmission assembly.

[0009] The travel-driven force storage mechanism can rotate with the transmission shaft and the conical transmission disk while the vehicle is moving, thereby realizing the force storage and release control of the impact actuator. On the one hand, it can simplify the structure of the device and realize the driving of the impact actuator without setting up an independent drive unit; on the other hand, it can also match the impact frequency with the vehicle's travel speed, so that the intervals between the impact detection points remain uniform.

[0010] Furthermore, the variable diameter transmission assembly includes a transmission shaft, a conical transmission disk and a trapezoidal belt. The transmission shaft is rotatably arranged in a lifting bracket, and two transmission shafts are provided. Baffle portions are symmetrically arranged on the transmission shaft, and polygonal sliding portions are arranged between the baffle portions. A threaded portion matching a manual adjustment nut is arranged on a transmission shaft located below, and the conical transmission disk is slidably arranged on the polygonal sliding portion. The conical transmission disk can rotate with the transmission shaft, and cross grooves are evenly distributed in an annular manner on the conical transmission disk. The two relatively arranged conical transmission disks cross-slide with each other through the cross grooves. A top ring portion is provided at one end of the conical transmission disk, and the trapezoidal belt is located at the intersection of the two conical transmission disks, and the trapezoidal belt and the conical transmission disk are in rolling contact.

[0011] The combination of the conical drive disc and the trapezoidal belt is similar to the speed change structure of a scooter. By changing the amplitude of the intersection of the two conical drive discs, the diameter of the pulley composed of the conical drive discs can be changed, thereby adjusting and controlling the transmission ratio between the two transmission shafts.

[0012] Preferably, the elastic retaining assembly is symmetrically provided with two groups, and the elastic retaining assembly includes a spring base, an elastic retaining spring and a rolling wheel. The spring base is fixedly connected to the upper transmission shaft, the elastic retaining spring is arranged between the top ring and the spring base, and the rolling wheel is fixedly connected to the lower transmission shaft.

[0013] Under the elastic force of the elastic retaining spring, the two conical transmission discs on the upper transmission shaft tend to approach each other (increase their effective diameters), but since the length of the trapezoidal belt remains unchanged, the upper conical transmission discs can only approach each other when the two lower conical transmission discs move away from each other.

[0014] Furthermore, the variable speed spacing control mechanism comprises a manual adjustment nut and an automatic adjustment component, wherein the manual adjustment nut is rotatably arranged on the variable diameter transmission component, and the automatic adjustment component is arranged on the variable diameter transmission component.

[0015] By rotating the manual adjustment nut, the position of a conical transmission disc below can be automatically set, thereby automatically setting the detection interval.

[0016] Preferably, the manual adjustment nut and the threaded portion are threadedly connected, and the manual adjustment nut is rotatably connected to a conical transmission disk; the automatic adjustment component includes an annular liquid storage box, a sliding adjustment ring and a reset spring, the annular liquid storage box is fixedly connected to the transmission shaft below, the sliding adjustment ring is provided with sliding rod portions evenly distributed in an annular shape, the sliding rod portions are snap-fitted and slidably arranged in the annular liquid storage box, the end of the sliding rod portion is provided with a circular ring portion, the circular ring portion is provided with inclined blade portions evenly distributed in an annular shape, the sliding adjustment ring is also provided with a flange portion, and the reset spring is arranged between the annular liquid storage box and the flange portion.

[0017] When the sliding adjustment ring rotates along with the transmission shaft, the blade portion will produce relative movement with the liquid due to the inertia of the liquid inside the annular liquid storage box; when the rotation speed of the transmission shaft is low, the transmission ratio between the two transmission shafts is maintained at the original set value, and as the speed increases, the detection distance can enter a stage where it increases with the increase in speed only when the liquid thrust increases to a level sufficient to overcome the elastic force of the reset spring; thereby achieving the technical effect of controlling the detection distance by speed.

[0018] Furthermore, the impact actuator includes a lifting control component and a impact component, the lifting control component is slidably arranged on the slide plate, and the impact component is arranged on the lifting control component.

[0019] Preferably, the lifting control assembly includes a power storage gear, a frame bracket and a power storage spring. The power storage gear is fixedly connected to the upper transmission shaft. The power storage gear is provided with a toothless portion. The frame bracket is symmetrically provided with longitudinal racks. The longitudinal racks are slidably engaged in the slide plate. The teeth of the longitudinal racks and the power storage gear are meshed for transmission. The frame bracket is also provided with a bottom bracket. The power storage spring is arranged between the top of the frame bracket and the slide plate.

[0020] Through the meshing transmission of the force storage gear and the longitudinal rack, the frame bracket can be pushed to lift and force is stored through the force storage spring. When the force storage gear rotates to the tooth-missing part, the elastic force of the force storage spring will drive the impact assembly to hit the ground, thereby performing an impact test on the ground hardness. There is no gap in the free state of the force storage spring, that is, the force storage spring can only provide pulling force but not thrust. Therefore, after the frame bracket rebounds to the extreme position, it can remain in this position and will not slide back and forth continuously.

[0021] Preferably, the striking assembly includes a striking shell, a sliding striking hammer, a fixed retaining ring, a position feedback module and a magnetic suction cup. The striking shell is clamped in the bottom bracket, the sliding striking hammer is provided with a sliding retaining ring, and the sliding striking hammer is slidably arranged in the striking shell through the clamping of the sliding retaining ring. A tail magnetic suction block is provided on the top of the sliding striking hammer, the fixed retaining ring is fixedly connected to the inner wall of the striking shell, the position feedback module is fixedly connected to the sliding striking hammer, and the magnetic suction cup is fixedly connected to the slide plate.

[0022] The movement path of the impact shell in each cycle is the same, but the position of the sliding impact hammer in the impact shell after each rebound is not necessarily the same. Therefore, the sliding impact hammer can be reset through the magnetic attraction when the magnetic suction cup and the tail magnetic suction block are close, so that the initial movement path of the sliding impact hammer in each cycle also remains the same.

[0023] Furthermore, the mounting assembly includes a sliding assembly and a slide plate, and the slide plate is arranged on the sliding assembly.

[0024] Preferably, the sliding assembly comprises a mounting plate, a sliding guide rail and a sliding block, wherein the sliding guide rail is symmetrically arranged on the mounting plate, the sliding block is snap-fitted and slidably arranged on the sliding guide rail, and the sliding block is arranged on the sliding block.

[0025] Preferably, the mounting assembly further comprises a spring seat and a downward pressure spring, wherein the spring seat is arranged on the mounting plate, and the downward pressure spring is arranged between the spring seat and the slide plate.

[0026] The downward pressure spring can keep the rolling wheel in contact with the ground, thus preventing the rolling wheel from being affected by the rise and fall of the vehicle body.

[0027] The beneficial effects achieved by the present invention using the above structure are as follows:

[0028] (1) The travel-driven force storage mechanism can rotate the transmission shaft and the conical transmission disc while the vehicle is moving, thereby realizing the force storage and release control of the impact actuator. On the one hand, it can simplify the structure of the device and realize the driving of the impact actuator without setting up an independent drive unit; on the other hand, it can also make the impact frequency match the travel speed of the vehicle, so that the intervals between the impact detection points remain uniform.

[0029] (2) The combination of the conical drive disc and the trapezoidal belt is similar to the speed change structure of a scooter. By changing the amplitude of the intersection of the two conical drive discs, the diameter of the pulley formed by the conical drive discs can be changed, thereby adjusting and controlling the transmission ratio between the two drive shafts.

[0030] (3) By rotating the manual adjustment nut, the position of a conical transmission disk below can be actively set, thereby actively setting the detection interval.

[0031] (4) When the sliding adjustment ring rotates along with the transmission shaft, the blade part and the liquid will produce relative motion due to the inertia of the liquid inside the annular liquid storage box. When the rotation speed of the transmission shaft is low, the transmission ratio between the two transmission shafts is maintained at the original set value. As the speed increases, the detection distance will increase with the increase of speed only when the liquid thrust increases to a level sufficient to overcome the elastic force of the return spring. Thus, the technical effect of controlling the detection distance by speed is achieved.

[0032] (5) The movement path of the impact shell in each cycle is the same, but the position of the sliding impact hammer in the impact shell after each rebound is not necessarily the same. Therefore, the sliding impact hammer can be reset by the magnetic attraction when the magnetic suction cup and the tail magnetic suction block are close to each other, so that the initial movement path of the sliding impact hammer in each cycle also remains the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A three-dimensional diagram of a continuous multi-point road surface hardness detection device proposed by the present invention;

[0034] Figure 2 This is a front view of a continuous multi-point road surface hardness detection device proposed by the present invention;

[0035] Figure 3 This is a left view of a continuous multi-point road surface hardness testing device proposed by the present invention;

[0036] Figure 4 A top view of a continuous multi-point road surface hardness detection device proposed by the present invention;

[0037] Figure 5 for Figure 3 A cross-sectional view along the cutting line AA;

[0038] Figure 6 for Figure 2 A cross-sectional view along the cutting line BB;

[0039] Figure 7 This is a schematic diagram of the explosion structure of a continuous multi-point road surface hardness detection device proposed by the present invention;

[0040] Figure 8 for Figure 5 A partial enlarged view of point Ⅰ in the middle;

[0041] Fig. 9 for Figure 5 A partial enlarged view of the middle II;

[0042] Fig.10 for Figure 5 A partial enlarged view of the middle part III;

[0043] Fig.11 for Figure 6 A partial enlarged view of the middle IV;

[0044] Fig.12 for Figure 7 A partial enlarged view of point V in the middle;

[0045] Fig.13 It is a schematic diagram of feedback results of the position feedback module;

[0046] Fig.14 Schematic diagram of the relationship between the transmission ratio between the two transmission shafts and the vehicle's travel speed.

[0047] Among them, 1. Travel drive type power storage mechanism, 2. Variable speed spacing control mechanism, 3. Shooting actuator, 4. Mounting assembly, 5. Lifting bracket, 6. Variable diameter transmission assembly, 7. Elastic retaining assembly, 8. Transmission shaft, 9. Conical transmission disc, 10. Trapezoidal belt, 11. Spring base, 12. Elastic retaining spring, 13. Rolling wheel, 14. Baffle part, 15. Polygonal sliding part, 16. Threaded part, 17. Cross slide, 18. Top ring part, 19. Manual adjustment nut, 20. Automatic adjustment assembly, 21. Ring liquid storage box, 22. Sliding adjustment ring, 23. Reset spring, 2 4. Sliding rod part, 25. Circular ring part, 26. Blade part, 27. Flange part, 28. Lifting control assembly, 29. Strike assembly, 30. Power storage gear, 31. Frame bracket, 32. Power storage spring, 33. Strike shell, 34. Sliding strike hammer, 35. Fixed retaining ring, 36. Position feedback module, 37. Magnetic suction cup, 38. Toothless part, 39. Longitudinal rack, 40. Bottom bracket, 41. Sliding retaining ring, 42. Tail magnetic suction block, 43. Sliding assembly, 44. Slide plate, 45. Spring seat, 46. Pressing spring, 47. Mounting plate, 48. Sliding guide rail, 49. Slider.

[0048] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0051] like Figure 1 to Figure 12 As shown, the present invention proposes a continuous multi-point road hardness detection device, including a traveling driven force storage mechanism 1, a variable speed spacing control mechanism 2, a spring actuator 3 and an installation assembly 4, the traveling driven force storage mechanism 1 is arranged on a slide plate 44, the variable speed spacing control mechanism 2 is arranged on the traveling driven force storage mechanism 1, and the spring actuator 3 is arranged on the slide plate 44.

[0052] The mounting assembly 4 includes a sliding assembly 43 and a sliding plate 44 , and the sliding plate 44 is arranged on the sliding assembly 43 .

[0053] The sliding assembly 43 includes a mounting plate 47 , a sliding guide rail 48 and a slider 49 . The sliding guide rail 48 is symmetrically arranged on the mounting plate 47 . The slider 49 is slidably arranged on the sliding guide rail 48 . The slide plate 44 is arranged on the slider 49 .

[0054] The mounting assembly 4 further includes a spring seat 45 and a pressing spring 46 . The spring seat 45 is disposed on the mounting plate 47 , and the pressing spring 46 is disposed between the spring seat 45 and the slide plate 44 .

[0055] The pressing spring 46 can keep the rolling wheel 13 in contact with the ground, thus preventing the rolling wheel 13 from being affected by the rise and fall of the vehicle body.

[0056] The traveling driven power storage mechanism 1 comprises a hoisting bracket 5, a variable diameter transmission assembly 6 and an elastic retaining assembly 7. The hoisting bracket 5 is arranged on the slide plate 44, the variable diameter transmission assembly 6 is rotatably arranged on the hoisting bracket 5, and the elastic retaining assembly 7 is arranged on the variable diameter transmission assembly 6.

[0057] The travel-driven force storage mechanism 1 can rotate with the transmission shaft 8 and the conical transmission disk 9 while the vehicle is moving, thereby realizing the force storage and release control of the impact actuator 3. On the one hand, it can simplify the structure of the device and realize the driving of the impact actuator 3 without setting up an independent drive unit; on the other hand, it can also match the impact frequency with the travel speed of the vehicle, so that the intervals between the impact detection points remain uniform.

[0058] The variable diameter transmission assembly 6 includes a transmission shaft 8, a conical transmission disc 9 and a trapezoidal belt 10. The transmission shaft 8 is rotatably arranged in the lifting bracket 5. There are two transmission shafts 8. Baffle portions 14 are symmetrically arranged on the transmission shaft 8. A polygonal sliding portion 15 is arranged between the baffle portions 14. A threaded portion 16 matching a manual adjustment nut 19 is arranged on the transmission shaft 8 located at the bottom. The conical transmission disc 9 is slidably arranged on the polygonal sliding portion 15. The conical transmission disc 9 can rotate with the transmission shaft 8. Cross grooves 17 are evenly distributed in an annular shape on the conical transmission disc 9. The two relatively arranged conical transmission discs 9 cross-slide with each other through the cross grooves 17. A top ring portion 18 is arranged at one end of the conical transmission disc 9. The trapezoidal belt 10 is located at the intersection of the two conical transmission discs 9. The trapezoidal belt 10 and the conical transmission disc 9 are in rolling contact.

[0059] The cooperation between the conical transmission disc 9 and the trapezoidal belt 10 is similar to the speed change structure of a scooter. By changing the amplitude of the intersection of the two conical transmission discs 9, the diameter of the pulley formed by the conical transmission discs 9 can be changed, thereby adjusting and controlling the transmission ratio between the two transmission shafts 8.

[0060] The elastic retaining assembly 7 is symmetrically provided with two groups, and the elastic retaining assembly 7 includes a spring base 11, an elastic retaining spring 12 and a rolling wheel 13. The spring base 11 is fixedly connected to the upper transmission shaft 8, the elastic retaining spring 12 is arranged between the top ring 18 and the spring base 11, and the rolling wheel 13 is fixedly connected to the lower transmission shaft 8.

[0061] Under the elastic force of the elastic retaining spring 12, the two conical transmission discs 9 on the upper transmission shaft 8 tend to approach each other (increase their effective diameters), but since the length of the trapezoidal belt 10 remains unchanged, the upper conical transmission disc 9 can only be allowed to approach each other when the two lower conical transmission discs 9 move away from each other.

[0062] The variable speed spacing control mechanism 2 comprises a manual adjustment nut 19 and an automatic adjustment component 20 . The manual adjustment nut 19 is rotatably disposed on the variable diameter transmission component 6 , and the automatic adjustment component 20 is disposed on the variable diameter transmission component 6 .

[0063] By rotating the manual adjustment nut 19, the position of a conical transmission disc 9 below can be actively set, thereby actively setting the detection interval.

[0064] The manual adjustment nut 19 is threadedly connected to the threaded portion 16, and the manual adjustment nut 19 is rotatably connected to a conical transmission disk 9; the automatic adjustment component 20 includes an annular liquid storage box 21, a sliding adjustment ring 22 and a reset spring 23, the annular liquid storage box 21 is fixedly connected to the transmission shaft 8 below, and the sliding adjustment ring 22 is provided with sliding rod portions 24 in an annular manner, and the sliding rod portions 24 are slidably arranged in the annular liquid storage box 21, and a circular ring portion 25 is provided at the end of the sliding rod portion 24, and inclined blade portions 26 are evenly distributed in an annular manner on the circular ring portion 25, and a flange portion 27 is also provided on the sliding adjustment ring 22, and the reset spring 23 is arranged between the annular liquid storage box 21 and the flange portion 27.

[0065] When the sliding adjustment ring 22 rotates along with the transmission shaft 8, due to the inertia of the liquid inside the annular liquid storage box 21, the blade portion 26 will produce relative movement with the liquid; when the rotation speed of the transmission shaft 8 is relatively low, the transmission ratio between the two transmission shafts 8 is maintained at the original set value, and as the speed increases, only when the liquid thrust increases to a level sufficient to overcome the elastic force of the reset spring 23, can the detection interval enter a stage where it increases with the increase in speed; thereby achieving the technical effect of controlling the detection interval by speed.

[0066] The impact actuator 3 includes a lifting control component 28 and a impact component 29 . The lifting control component 28 is slidably disposed on the slide plate 44 , and the impact component 29 is disposed on the lifting control component 28 .

[0067] The lifting control assembly 28 includes a power storage gear 30, a frame bracket 31 and a power storage spring 32. The power storage gear 30 is fixedly connected to the upper transmission shaft 8. A toothed portion 38 is provided on the power storage gear 30. A longitudinal rack 39 is symmetrically provided on the frame bracket 31. The longitudinal rack 39 is engaged and slidably arranged in the slide plate 44. The longitudinal rack 39 and the tooth portion of the power storage gear 30 are meshed for transmission. A bottom bracket 40 is also provided on the frame bracket 31. The power storage spring 32 is arranged between the top of the frame bracket 31 and the slide plate 44.

[0068] Through the meshing transmission of the power storage gear 30 and the longitudinal rack 39, the frame bracket 31 can be pushed to lift and power can be stored through the power storage spring 32. When the power storage gear 30 rotates to the toothless portion 38, the elastic force of the power storage spring 32 will drive the impact component 29 to impact the ground, thereby performing an impact test on the ground hardness; there is no gap in the power storage spring 32 in the free state, that is, the power storage spring 32 can only provide pulling force but not thrust. Therefore, after the frame bracket 31 rebounds to the extreme position, it can remain in this position and will not slide back and forth continuously.

[0069] The striking assembly 29 includes a striking shell 33, a sliding striking hammer 34, a fixed retaining ring 35, a position feedback module 36 and a magnetic suction cup 37. The striking shell 33 is snap-fitted in the bottom bracket 40, and a sliding retaining ring 41 is provided on the sliding striking hammer 34. The sliding striking hammer 34 is snap-fitted and slidably arranged in the striking shell 33 through the sliding retaining ring 41. A tail magnetic suction block 42 is provided on the top of the sliding striking hammer 34. The fixed retaining ring 35 is fixedly connected to the inner wall of the striking shell 33, the position feedback module 36 is fixedly connected to the sliding striking hammer 34, and the magnetic suction cup 37 is fixedly connected to the slide plate 44.

[0070] The movement path of the impact shell 33 in each cycle is the same, but the position of the sliding impact hammer 34 in the impact shell 33 after each rebound is not necessarily the same. Therefore, the sliding impact hammer 34 can be reset through the magnetic attraction when the magnetic suction cup 37 and the tail magnetic suction block 42 are close, so that the initial movement path of the sliding impact hammer 34 in each cycle also remains the same.

[0071] like Fig.13 As shown, the horizontal axis represents the vehicle's travel distance S, the vertical axis represents the position coordinate h of the position feedback module 36, and the vertical dotted lines divide the entire curve into multiple cycles. In one cycle: the short horizontal line at the top represents the stage in which the fixed retaining ring 35 rebounds and descends with the sliding retaining ring 41. In this stage, the sliding impact hammer 34 is at the top limit position in the impact shell 33 and remains relatively still with the impact shell 33; the subsequent descending oblique line represents the stage in which the sliding impact hammer 34 continues to impact the ground after the impact shell 33 stops; the subsequent rising oblique line represents the stage in which the sliding impact hammer 34 continues to impact the ground The following long horizontal line indicates the power accumulation stage in which the sliding impact hammer 34 rises together with the impact shell 33; the following rising oblique line indicates the stage in which the tail magnetic block 42 rises to the top before the impact shell 33 after being attracted by the magnetic suction cup 37; during the contact time between the tail magnetic block 42 and the magnetic suction cup 37, the impact shell 33 actually also experiences rising and falling, and during this process, the impact shell 33 and the sliding impact hammer 34 also have a small relative displacement, but because this period of time is short and irrelevant to the detection result, it can be ignored in the feedback result;

[0072] In multiple measurement cycles, the release position and the impact position remain unchanged, but the rebound position is different. The hardness information of the measuring point can be obtained through the coordinates of the rebound position.

[0073] like Fig.14 As shown, the horizontal axis represents the vehicle's travel speed V, and the vertical axis represents the distance d between the measuring points; in the low-speed stage, even if the vehicle speed fluctuates, d remains unchanged; when the vehicle speed increases to a certain extent, the transmission ratio between the two transmission shafts 8 changes with the change of vehicle speed, and d also increases with the increase of V.

[0074] When in use, the user first needs to install the device on a traction vehicle through the mounting plate 47, and the traction vehicle only needs to be able to move stably; the slide plate 44 has a downward tendency under the elastic force of the downward pressure spring 46, so when the vehicle rises and falls due to its own suspension action, the rolling wheel 13 can maintain contact with the ground.

[0075] When the rolling wheel 13 rolls on the ground, it will drive the transmission shaft 8 below to rotate. In the initial state, the two transmission shafts 8 are transmitted through the trapezoidal belt 10 at the originally set transmission ratio. When the upper transmission shaft 8 rotates, it will drive the power storage gear 30 to rotate. Through the meshing cooperation between the power storage gear 30 and the longitudinal rack 39, the frame bracket 31 will continue to rise during this process, and the power storage spring 32 will deform and accumulate elastic force.

[0076] When the toothless portion 38 rotates to the side where the frame bracket 31 is located, the two are no longer combined temporarily, and the frame bracket 31 rebounds to the bottom under the elastic force of the force storage spring 32; there is no gap in the free state of the force storage spring 32, that is, the force storage spring 32 can only provide pulling force but not thrust. Therefore, after the frame bracket 31 rebounds to the extreme position, it can remain in this position and will not slide back and forth continuously.

[0077] The movement path of the impact shell 33 in each cycle is the same, but the position of the sliding impact hammer 34 in the impact shell 33 after the last impact is not necessarily the same. Therefore, after the tail magnetic block 42 approaches the magnetic suction cup 37, the magnetic attraction between the magnetic suction cup 37 and the tail magnetic block 42 can make the tail magnetic block 42 rise to the position in contact with the magnetic suction cup 37, thereby realizing the reset of the sliding impact hammer 34, so that the initial movement path of the sliding impact hammer 34 in each cycle also remains the same;

[0078] When the frame bracket 31 rebounds and descends, the fixed retaining ring 35 will also descend with the sliding spring hammer 34. Since the path and power of the striking shell 33 and the sliding spring hammer 34 are the same each time they descend, when the hardness of the detected position is different, the rebound amplitude of the sliding spring hammer 34 will also be different. The relative position of the sliding spring hammer 34 and the striking shell 33 can be recorded in real time through the position feedback module 36.

[0079] Since the impact actuator 3 is driven by the rolling wheel 13, the distance between the measuring points can be kept stable if the traveling speed of the vehicle fluctuates slightly.

[0080] When you want to actively adjust the spacing of the detection points, you only need to manually rotate the manual adjustment nut 19. Through the threaded cooperation between the manual adjustment nut 19 and the threaded portion 16 and the rotational cooperation between the manual adjustment nut 19 and the conical transmission disk 9, you can adjust the position of a conical transmission disk 9 located on the lower transmission shaft 8, thereby changing the transmission ratio between the two transmission shafts 8 in the initial state.

[0081] Within a certain low-speed range, as the vehicle speed increases, the frequency of the bounce also increases, so the spacing between the detection points is stable; however, as the vehicle speed increases, the frequency of the bounce cannot continue to rise; and because the operation steps are slightly complicated if the machine is stopped and manually adjusted every time the detection spacing is adjusted, the above problem can be effectively solved by using the automatic adjustment component 20.

[0082] When the sliding adjustment ring 22 rotates along with the transmission shaft 8, the blade portion 26 and the liquid will move relative to each other due to the inertia of the liquid inside the annular liquid storage box 21. When the rotation speed of the transmission shaft 8 is low, the transmission ratio between the two transmission shafts 8 is maintained at the originally set value. However, as the speed increases, when the liquid thrust increases to a value sufficient to overcome the elastic force of the return spring 23, the sliding of the sliding adjustment ring 22 can push the other conical transmission disk 9 on the lower transmission shaft 8 to slide, thereby further adjusting the transmission ratio between the two transmission shafts 8.

[0083] As the speed increases, the two conical transmission discs 9 at the bottom move away from each other, and the diameter of the transmission wheel they form decreases. At this time, the two conical transmission discs 9 at the top will move closer to each other under the elastic force of the elastic retaining spring 12, and the diameter of the transmission wheel they form increases. By changing the transmission ratio, the technical effect of faster speed and larger monitoring point spacing is achieved.

[0084] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0085] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A continuous multi-point road surface hardness detection device, characterized in that: The invention comprises a travel-driven power storage mechanism (1), a speed-changing spacing control mechanism (2), a snap actuator (3) and a mounting assembly (4), wherein the mounting assembly (4) comprises a sliding assembly (43) and a sliding plate (44), wherein the sliding plate (44) is arranged on the sliding assembly (43), the travel-driven power storage mechanism (1) is arranged on the sliding plate (44), the speed-changing spacing control mechanism (2) is arranged on the travel-driven power storage mechanism (1), and the snap actuator (3) is arranged on the sliding plate (44); The traveling drive type power storage mechanism (1) comprises a hanging bracket (5), a variable diameter transmission assembly (6) and an elastic retaining assembly (7), wherein the hanging bracket (5) is arranged on a slide plate (44), the variable diameter transmission assembly (6) is rotatably arranged on the hanging bracket (5), and the elastic retaining assembly (7) is arranged on the variable diameter transmission assembly (6); The variable speed spacing control mechanism (2) comprises a manual adjustment nut (19) and an automatic adjustment component (20), wherein the manual adjustment nut (19) is rotatably mounted on the variable diameter transmission component (6), and the automatic adjustment component (20) is mounted on the variable diameter transmission component (6); The variable diameter transmission assembly (6) comprises a transmission shaft (8), a conical transmission disc (9) and a trapezoidal belt (10); the transmission shaft (8) is rotatably arranged in a hanging bracket (5); two transmission shafts (8) are provided; baffle portions (14) are symmetrically arranged on the transmission shaft (8); polygonal sliding portions (15) are arranged between the baffle portions (14); a threaded portion (16) matching the manual adjustment nut (19) is provided on the lower transmission shaft (8); the conical transmission disc (9) is slidably arranged on the plurality of baffle portions (14); On the angular sliding portion (15), the conical transmission disc (9) can rotate along with the transmission shaft (8), the conical transmission disc (9) is evenly distributed with cross grooves (17) in an annular shape, and two conical transmission discs (9) arranged opposite to each other cross and slide with each other through the cross grooves (17), one end of the conical transmission disc (9) is provided with a top ring portion (18), the trapezoidal belt (10) is located at the intersection of the two conical transmission discs (9), and the trapezoidal belt (10) and the conical transmission disc (9) are in rolling contact with each other; The elastic retaining assembly (7) is symmetrically provided with two groups, and the elastic retaining assembly (7) comprises a spring base (11), an elastic retaining spring (12) and a rolling wheel (13), wherein the spring base (11) is fixedly connected to an upper transmission shaft (8), the elastic retaining spring (12) is arranged between a top ring portion (18) and the spring base (11), and the rolling wheel (13) is fixedly connected to a lower transmission shaft (8).

2. A continuous multi-point road surface hardness detection device according to claim 1, characterized in that: The manual adjustment nut (19) is threadedly connected to the threaded portion (16), and the manual adjustment nut (19) is rotationally connected to a conical transmission disk (9); the automatic adjustment component (20) comprises an annular liquid storage box (21), a sliding adjustment ring (22) and a reset spring (23); the annular liquid storage box (21) is fixedly connected to the transmission shaft (8) below; the sliding adjustment ring (22) is provided with sliding rod portions (24) in an annular manner; the sliding rod portions (24) are slidably arranged in the annular liquid storage box (21); a circular ring portion (25) is provided at the end of the sliding rod portion (24); the circular ring portion (25) is provided with inclined blade portions (26) in an annular manner; the sliding adjustment ring (22) is also provided with a flange portion (27); and the reset spring (23) is arranged between the annular liquid storage box (21) and the flange portion (27).

3. A continuous multi-point road surface hardness detection device according to claim 2, characterized in that: The impact actuator (3) comprises a lifting control component (28) and a impact component (29), wherein the lifting control component (28) is slidably disposed on a slide plate (44), and the impact component (29) is disposed on the lifting control component (28).

4. A continuous multi-point road surface hardness detection device according to claim 3, characterized in that: The lifting control assembly (28) comprises a power storage gear (30), a frame bracket (31) and a power storage spring (32). The power storage gear (30) is fixedly connected to the transmission shaft (8) above. The power storage gear (30) is provided with a toothless portion (38). The frame bracket (31) is symmetrically provided with longitudinal racks (39). The longitudinal racks (39) are slidably arranged in a slide plate (44). The longitudinal racks (39) and the toothed portions of the power storage gear (30) are meshed for transmission. The frame bracket (31) is also provided with a bottom bracket (40). The power storage spring (32) is arranged between the top of the frame bracket (31) and the slide plate (44).

5. A continuous multi-point road surface hardness detection device according to claim 4, characterized in that: The striking assembly (29) comprises a striking shell (33), a sliding striking hammer (34), a fixed retaining ring (35), a position feedback module (36) and a magnetic suction cup (37); the striking shell (33) is snap-fitted in the bottom bracket (40); a sliding retaining ring (41) is provided on the sliding striking hammer (34); the sliding striking hammer (34) is snap-fitted and slidably arranged in the striking shell (33) through the sliding retaining ring (41); a tail magnetic suction block (42) is provided on the top of the sliding striking hammer (34); the fixed retaining ring (35) is fixedly connected to the inner wall of the striking shell (33); the position feedback module (36) is fixedly connected to the sliding striking hammer (34); and the magnetic suction cup (37) is fixedly connected to the slide plate (44).

6. A continuous multi-point road surface hardness detection device according to claim 5, characterized in that: The sliding assembly (43) comprises a mounting plate (47), a sliding guide rail (48) and a sliding block (49); the sliding guide rail (48) is symmetrically arranged on the mounting plate (47); the sliding block (49) is slidably arranged on the sliding guide rail (48); and the sliding plate (44) is arranged on the sliding block (49).

7. A continuous multi-point road surface hardness detection device according to claim 6, characterized in that: The mounting assembly (4) further comprises a spring seat (45) and a downward pressure spring (46); the spring seat (45) is arranged on the mounting plate (47); and the downward pressure spring (46) is arranged between the spring seat (45) and the slide plate (44).

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