Composite hydraulic material paving thickness adjusting device

Abstract

The invention discloses a composite hydraulic material paving thickness adjusting device, and relates to the related technical field of pavement paving equipment.The composite hydraulic material paving thickness adjusting device comprises a paving box, a rigid scraping plate is arranged at the bottom of the paving box in a swinging mode, a flexible scraping plate is further arranged at the bottom of the paving box, and a winding rod for winding the flexible scraping plate is rotationally arranged at the bottom of the paving box; a driving piece is further arranged on the paving box, and the end part of the winding rod and the power output end of the driving piece are in transmission through a worm and gear mechanism; an auxiliary scraping plate is further arranged at the bottom of the paving box in a swinging mode, the auxiliary scraping plate and the rigid scraping plate swing synchronously, and in the paving stroke, the auxiliary scraping plate tightens the flexible scraping plate.

Description

Technical Field

[0001] This invention relates to the technical field of road paving equipment, specifically a composite hydraulic material paving thickness adjustment device. Background Technology

[0002] As is generally known, composite hydraulic materials refer to a material system composed of multiple hydraulic components, such as cement, lime, fly ash, etc., or combined with organic or inorganic modified materials. Its core characteristic is that it can harden in water and maintain its strength. At the same time, its performance, such as strength, durability, and workability, is optimized through composite design.

[0003] When addressing road surface defects such as reduced friction resistance, cracks, and ruts, a slurry seal pavement maintenance process is used. This process utilizes a slurry seal machine that, through three stages—metering, mixing, and paving—to spread composite hydraulic materials onto the road surface requiring maintenance. For example, patent CN116537006A, published on August 4, 2023, entitled "A Slurry Seal Machine for Road Maintenance," includes a movable base, handle, traveling and lifting mechanism, fixed scraper, scraping and feeding mechanism, connecting pipe, brush, storage chamber, mixing rod, drive shaft one, connecting gear, and outer... The invention comprises a housing, a motor, a feeding port, and a delivery pump. It features a reasonable and simple structure, low production cost, and convenient installation. The included motor drives the wheels on both sides to move synchronously up and down, allowing for adjustment of the height of the fixed scraper to meet the needs of different thicknesses of slurry seal coatings. The brush bristles in this invention first clean the ground surface before sealing, ensuring the quality of the slurry seal coating and improving the quality of road maintenance. The scraping and feeding mechanism in this invention can quickly and evenly spread the slurry onto the ground using the movable scraper, thereby improving the efficiency of the slurry seal coating.

[0004] In the operation of a slurry seal machine, after the slurry mixture cup is delivered to the paving box, the internal spiral distributor will evenly distribute the mixture along the paving width. Then, the scraper mechanism will lay the slurry mixture smoothly on the road surface with a preset thickness. As the core component of the slurry seal machine paving system, the scraper mechanism is generally composed of a combination of rigid and flexible scrapers to improve the paving effect. However, there are still shortcomings. When the rigid scraper encounters large-diameter aggregates, it cannot elastically yield, which can easily cause the rigid scraper to directly drive the large-diameter aggregates to move together. This will cause scratches on the slurry seal road surface and damage the smoothness of the road surface. Summary of the Invention

[0005] The purpose of this invention is to provide a device for adjusting the paving thickness of composite hydraulic materials, thereby solving the technical problems in related technologies. To achieve the above objective, this invention provides the following technical solution: A composite hydraulic material paving thickness adjustment device is disclosed, used to adjust the distance between a rigid scraper and the road surface. The device includes a paving box, with the rigid scraper oscillating at the bottom of the paving box. A flexible scraper is also provided at the bottom of the paving box. A winding rod for winding the flexible scraper is rotatably mounted at the bottom of the paving box. A driving component is also provided on the paving box, and the end of the winding rod is transmitted to the power output end of the driving component via a worm gear mechanism. An auxiliary scraper is also oscillating at the bottom of the paving box, oscillating synchronously with the rigid scraper. During the paving stroke, the auxiliary scraper tensions the flexible scraper.

[0006] The aforementioned flexible scraper includes a main section and a tail section, and an insertion groove is provided at the junction of the main section and the tail section. The edge of the auxiliary scraper away from its own swing rod is inserted into the insertion groove.

[0007] As described above, the winding rod is equipped with a force detection mechanism, and the driving component drives the winding rod to rotate in real time based on the signal from the force detection mechanism.

[0008] As described above, a main gear is installed at the end of the winding rod, and secondary gears are installed on the swing rods of both the auxiliary scraper and the rigid scraper. The main gear meshes with a first rack, and the two secondary gears mesh with a second rack. An elastic element is provided between the second rack and the paving box. The first rack always remains meshed with the main gear, and when the first rack moves, it drives the second rack to move synchronously. The power output shaft of the drive unit includes a main section connected to the drive source and a secondary section equipped with a worm gear. The main section is rotatably connected to the second rack. When it is not necessary to adjust the distance between the rigid scraper and the road surface, the second rack and the secondary gear are not fully meshed due to the elastic force of the elastic element, and the main section does not drive the secondary section to rotate. When it is necessary to adjust the distance between the rigid scraper and the road surface, the drive source first drives the main section to press down the second rack to fully mesh with the secondary gear, and then drives the secondary section to rotate.

[0009] As described above, the second rack has a slot, the first rack is located in the slot, and the second rack slides on the first rack along the direction of the force applied to the second rack by the elastic member. The paving box is provided with a stop bar to prevent the first rack from disengaging completely from the main gear.

[0010] The aforementioned elastic element includes a groove opened on the paving box, a top plate slidably disposed in the groove, a first spring disposed between the top plate and the paving box, and a second rack slidably disposed on the top plate in the direction that drives the secondary gear to rotate.

[0011] As mentioned above, several intercepting rods are arranged sequentially along the axial direction on the swing rod of the rigid scraper.

[0012] As described above, the intercepting bar has an arc-shaped structure and is equipped with a guide ramp and a placement groove. During the paving process, the guide ramp guides the large-diameter aggregate to the placement groove.

[0013] As mentioned above, the swing arm of the rigid scraper is hollow inside and is equipped with a second spring. Each intercepting bar is provided with a buckle, which connects the corresponding intercepting bar to the second spring. When it is not necessary to adjust the distance between the rigid scraper and the road surface, the rotation of the main section causes the pitch of the second spring to change.

[0014] As mentioned above, each of the aforementioned interceptor bars is equipped with a baffle, and the two baffles corresponding to two adjacent interceptor bars are stacked together.

[0015] The beneficial effects of this invention are as follows: by setting an auxiliary scraper to swing synchronously with the rigid scraper, and using the auxiliary scraper to tighten the flexible scraper, the flexible scraper will elastically yield when the rigid scraper encounters large-diameter aggregates, thereby preventing the rigid scraper from directly driving the large-diameter aggregates to move together and causing scratches on the pavement of composite hydraulic materials. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of a composite hydraulic material paving thickness adjustment device provided in an embodiment of the present invention; Figure 2 This is a top view schematic diagram of a composite hydraulic material paving thickness adjustment device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal components of a composite hydraulic material paving thickness adjustment device provided in an embodiment of the present invention; Figure 4 for Figure 2 A cross-sectional structural diagram of part of the structure at point AA; Figure 5 for Figure 4 A magnified structural diagram at point D in the diagram; Figure 6 for Figure 2 A cross-sectional structural diagram of the part at BB in the diagram; Figure 7 for Figure 2 A cross-sectional structural diagram of the part at point CC; Figure 8 for Figure 2 A cross-sectional structural diagram of the EE section.

[0018] Explanation of reference numerals in the attached figures: 1. Paving box; 2. Rigid scraper; 3. Flexible scraper; 30. Main section; 31. Tail section; 32. Insertion groove; 4. Winding rod; 5. Auxiliary scraper; 6. Main gear; 7. Secondary gear; 8. First rack; 9. Second rack; 10. Main section; 11. Secondary section; 12. Slot; 13. Slide groove; 14. Top plate; 15. First spring; 16. Intercepting rod; 17. Guide slope; 18. Retention groove; 19. Second spring; 20. Buckle; 21. Round block; 22. Adjusting screw; 23. Transmission rod; 24. Baffle; 25. Stop bar; 26. Worm gear; 27. Worm wheel; 28. Discharge port. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the appendix. Figure 1 To be continued Figure 8 The present invention will now be described in further detail.

[0020] In this embodiment of the invention, a composite hydraulic material paving thickness adjustment device is provided, which is used to adjust the distance between a rigid scraper 2 and the road surface. The device includes a paving box 1, with the rigid scraper 2 oscillating at the bottom of the paving box 1. A flexible scraper 3 is also provided at the bottom of the paving box 1. A winding rod 4 for winding the flexible scraper 3 is rotatably provided at the bottom of the paving box 1. A driving component is also provided on the paving box 1, and the end of the winding rod 4 is transmitted to the power output end of the driving component via a worm gear mechanism. An auxiliary scraper 5 is also oscillating at the bottom of the paving box 1, oscillating synchronously with the rigid scraper 2. During the paving stroke, the auxiliary scraper 5 tensions the flexible scraper 3.

[0021] Specifically, to evenly spread the composite hydraulic material on the road surface, a slurry sealer first measures the amount of each aggregate, mixes and stirs them, and then conveys them through a hopper to a spiral distributor on the paving box 1, evenly distributing the composite hydraulic material onto the road surface at the discharge port 28. The material reaching the road surface is first evenly guided along the width direction by a rigid scraper 2, limiting the paving thickness. The paving thickness of the composite hydraulic material is determined by the distance between the rigid scraper 2 and the road surface; therefore, the distance between the rigid scraper 2 and the road surface needs to be adjusted according to actual requirements. Then, a flexible scraper 3 further smears the paved material surface. Secondary finishing is performed, which involves smoothing out minor bumps or particle marks to make the final paved surface smoother. The distance between the rigid scraper 2 and the road surface is adjusted by the rigid scraper 2 being oscillating at the bottom of the paving. The distance can be adjusted by controlling its oscillation angle, either via a cylinder or motor. This is existing technology and will not be elaborated upon. However, in actual use, the rigid scraper 2 still has some shortcomings. Specifically, when encountering large-diameter aggregates, the rigid scraper 2 cannot elastically yield, easily causing the rigid scraper to directly move the large-diameter aggregates along with it. This will scratch the paved slurry seal layer and damage the road surface's smoothness.

[0022] Based on the above problems, in this embodiment, the extension length of the flexible scraper 3 is controlled. Specifically, a winding rod 4 capable of winding the flexible scraper 3 is provided at the bottom of the paving box 1. The rotation of the winding rod 4 is transmitted through a worm gear mechanism and the power output end of the drive component. Specifically, a worm wheel 27 is arranged at the end of the winding rod 4, and a worm 26 is arranged at the power output end of the drive component. The worm wheel 27 and the worm 26 are always meshed. The drive component can be a motor, meaning the motor drives the worm 26 to rotate, which in turn drives the worm wheel 27. The worm wheel 27 drives the winding rod 4 to wind or release the flexible scraper 3. Furthermore, an auxiliary scraper 5 is also arranged at the bottom of the paving box 1. The auxiliary scraper 5 does not participate in smoothing the paved material on the road surface, but it oscillates synchronously with the rigid scraper 2 (e.g., a parallelogram structure). The auxiliary scraper 5 is connected to the flexible scraper 3, and the bottom of the paving box 1, the auxiliary scraper 5, and the flexible scraper 3 form an obtuse angle. The angular structure means that when the flexible scraper 3 extends, it can drive the auxiliary scraper 5 to swing. That is, when the flexible scraper 3 is rolled up, the end of the auxiliary scraper 5 away from its swing rod moves closer to the road surface. Conversely, when the flexible scraper 3 is released and extended, it extends in the opposite direction of the forward direction due to the friction of the road surface, which will push the auxiliary scraper 5 away from the road surface. The auxiliary scraper 5 and the rigid scraper 2 swing synchronously, thereby adjusting the distance between the rigid scraper 2 and the road surface. Moreover, when the rigid scraper 2 encounters large-diameter aggregates (that is, large-diameter aggregates formed by some aggregates that were not completely broken up during the mixing process, or stones left on the original road surface, etc.), the end of the rigid scraper 2 away from its swing rod will move away from the road surface. Then the angle between the auxiliary scraper 5 and the bottom of the paving box 1 increases, which will stretch the flexible scraper 3. By utilizing the elastic change of the flexible scraper 3, the rigid scraper 2 will elastically retreat and avoid the large-diameter aggregates.

[0023] In this embodiment, by setting the auxiliary scraper 5 to swing synchronously with the rigid scraper 2, and by using the auxiliary scraper 5 to tighten the flexible scraper 3, the flexible scraper 3 will elastically yield when the rigid scraper 2 encounters large-diameter aggregates, thereby preventing the rigid scraper 2 from directly driving the large-diameter aggregates to move together and causing scratches on the pavement of composite hydraulic materials.

[0024] Preferably, the flexible scraper 3 includes a main section 30 and a tail section 31, and an insertion groove 32 is provided at the junction of the main section 30 and the tail section 31. The edge of the auxiliary scraper 5 away from its own swing rod is inserted into the insertion groove 32.

[0025] Specifically, the main section 30 of the flexible scraper 3 can be wound by the winding rod 4. It has elastic deformation capability and a certain degree of toughness. The tail section 31 is basically attached to the surface of the paved composite hydraulic material and is relatively soft. The connection between the auxiliary scraper 5 and the flexible scraper 3 is that an insertion groove 32 is set at the junction of the main section 30 and the tail section 31. The edge of the auxiliary scraper 5 away from its own swing rod is inserted into the insertion groove 32.

[0026] Because the flexible scraper 3 has a certain degree of toughness, when its resilience is insufficient, it is easily affected by the impact of hard aggregates in the material, which can easily cause fluctuation problems, resulting in wavy patterns on the surface of the paving layer. In this embodiment, the auxiliary scraper 5 is used to tighten the flexible scraper 3, which can provide a certain downward pressure on the flexible scraper 3, improve the toughness of the flexible scraper 3, and reduce the occurrence of fluctuation problems.

[0027] Preferably, the winding rod 4 is equipped with a force detection mechanism. The driving component drives the winding rod 4 to rotate in real time based on the signal from the force detection mechanism. Specifically, the force detection mechanism, such as a pressure sensor (which is existing technology and will not be described in detail, and is not specifically shown in the figure), can monitor the force on the rigid scraper 2. If the large-diameter aggregate encountered can pass through under the elastic yielding of the rigid scraper 2, normal operation is carried out. If the large-diameter aggregate encountered cannot pass through under the elastic yielding of the rigid scraper 2, the staff needs to be reminded to stop the machine and clean up the large-diameter aggregate to avoid affecting the pavement effect.

[0028] Furthermore, a main gear 6 is installed at the end of the winding rod 4, and secondary gears 7 are installed on the swing rods of the auxiliary scraper 5 and the rigid scraper 2. The main gear 6 meshes with a first rack 8, and the two secondary gears 7 mesh with a second rack 9. An elastic element is provided between the second rack 9 and the paving box 1. The first rack 8 always maintains meshing with the main gear 6, and when the first rack 8 moves, it drives the second rack 9 to move synchronously. The power output shaft of the driving component includes a main section 10 connected to the driving source and a secondary section 11 equipped with a worm gear, and the main section 10 is rotatably connected to the second rack 9. When it is not necessary to adjust the distance between the rigid scraper 2 and the road surface, based on the elastic force of the elastic element, the second rack 9 and the secondary gear 7 are not fully meshed, and the main section 10 does not drive the secondary section 11 to rotate. When it is necessary to adjust the distance between the rigid scraper 2 and the road surface, the driving source first drives the main section 10 to press down the second rack 9 to fully mesh with the secondary gear 7, and then drives the secondary section 11 to rotate.

[0029] Specifically, in the aforementioned embodiments, the distance between the rigid scraper 2 and the road surface is indirectly adjusted by using a driving component to drive the winding rod 4 to wind or release. However, due to the elastic deformation capability of the flexible scraper 3, this adjustment method can easily lead to larger errors in the position adjustment of the rigid scraper 2.

[0030] Therefore, based on the above problems, in this embodiment, when it is necessary to adjust the distance between the rigid scraper 2 and the road surface, the adjustment is made directly. When it is not necessary to adjust the distance between the rigid scraper 2 and the road surface, the elastic deformation capability of the flexible scraper 3 is still used to provide an elastic yielding function for the rigid scraper 2. That is, the end of the winding rod 4 is not only equipped with a worm gear, but also with a main gear 6. Then, a secondary gear 7 is installed on the swing rod of the auxiliary scraper 5 and the rigid scraper 2 respectively. The main gear 6 meshes with a first rack 8, and the two secondary gears 7 mesh with a second rack 9. In this way, the auxiliary scraper 5 and the rigid scraper 2 can swing synchronously. The first rack 8 needs to always maintain meshing with the main gear 6, and during its movement, it also needs to drive the second rack 9 to move together. When adjusting the distance between the rigid scraper 2 and the road surface, the distance between the main section 30 of the flexible scraper 3 and the road surface can also be adjusted accordingly. The distance between the main section 30 and the road surface is kept approximately the same as the distance between the rigid scraper 2 and the road surface. In an optional embodiment, the second rack 9 has a groove 12, and the first rack 8 is located within the groove 12. The length of the groove 12 is approximately the same as the length of the first rack 8. Along the direction of the force applied to the second rack 9 by the elastic element, the second rack 9 slides on the first rack 8. The paving box 1 has a stop bar 25 to prevent the first rack 8 from fully disengaging from the main gear 6. Thus, when the first rack 8 drives the main gear 6 to rotate, it can drive the second rack 9 to move together, and the second rack 9 can drive the secondary gear 7 to rotate. This allows for the synchronous oscillation of the auxiliary scraper 5, the main section 30 of the flexible scraper 3, and the rigid scraper 2. The flexible scraper 3's elastic deformation capability provides a yielding function for the rigid scraper 2. When the distance between the rigid scraper 2 and the road surface does not need adjustment, the second rack 9 and the auxiliary gear 7 cannot fully mesh. Therefore, an elastic element is provided between the second rack 9 and the paving box 1. In an optional embodiment, the elastic element includes a groove 13 on the paving box 1, with a top plate 14 slidably disposed within the groove 13. A first spring 15 is provided between the top plate 14 and the paving box 1. The second rack 9 is slidably arranged on the top plate 14 in the direction that drives the auxiliary gear 7 to rotate. Thus, the elastic force of the first spring 15 causes the top plate 14 to push the second rack 9 away from the auxiliary gear 7. While not fully engaged, the rigid scraper 2 must maintain a suitable elastic clearance to ensure the material reaching the road surface is evenly distributed along its width, guaranteeing the paving thickness. When adjusting the distance between the rigid scraper 2 and the road surface, the drive component must first press down the second rack 9 to engage with the secondary gear 7, then drive the winding rod 4 to rotate. This means the drive component's power output shaft is divided into a main section 10 and a secondary section 11. The main section 10 is connected to the power output end of the drive source, and the secondary section 11 is connected to the worm gear. When the second rack 9 and secondary gear 7 are not fully engaged, the rotation of the main section 10 cannot transmit power to the secondary section 11; that is, there is no interaction between them in the circumferential direction. When adjusting the distance between the rigid scraper 2 and the road surface...The drive source first moves the main section 10 downwards, pushing the second rack 9 to fully mesh with the secondary gear 7. Then, the main section 10 and the secondary section 11 can no longer rotate relative to each other. This changes their previous state of being able to both rotate and slide axially to a state where they can only slide axially (this structure is existing technology and will not be elaborated upon). That is, they interact circumferentially. Thus, the rotation of the main section 10 can drive the secondary section 11 to rotate synchronously, thereby driving the winding rod 4 to rotate. This allows the drive source to both move the main section 10 axially and rotate it. Therefore, the drive source can combine a motor and a cylinder (the motor and cylinder are not specifically shown in the figure).

[0031] Preferably, a plurality of intercepting rods 16 are arranged sequentially along the axial direction on the swing arm of the rigid scraper 2. Specifically, the plurality of intercepting rods 16 are used to intercept large-diameter aggregates to avoid contact with the rigid scraper 2, thereby reducing the wear of the rigid scraper 2. The intercepted large-diameter aggregates should be kept a distance away from the ground so that the traces left by the large-diameter aggregates can be properly covered when the rigid scraper 2 is spreading the material. In an optional embodiment, the intercepting rods 16 have an arc-shaped structure with the arc-shaped opening facing the forward direction, and are provided with guide slopes 17 and placement grooves 18. During the paving stroke, the guide slopes 17 guide the large-diameter aggregates to the placement grooves 18, wherein there is a certain distance between the placement grooves 18 and the road surface, such as the distance between the rigid scraper 2 and the road surface.

[0032] Furthermore, the swing arm of the rigid scraper 2 is hollow inside, and a second spring 19 is provided therein. Each intercepting bar 16 is provided with a buckle 20, which connects the corresponding intercepting bar 16 to the second spring 19. When it is not necessary to adjust the distance between the rigid scraper 2 and the road surface, the rotation of the main section 10 causes the pitch of the second spring 19 to change.

[0033] Specifically, when using aggregates of different particle sizes, for large-sized aggregates that need to be intercepted, the distance between adjacent intercepting rods 16 needs to be adjusted so that aggregates of the appropriate particle size are not intercepted. That is, in this embodiment, the swing rod of the rigid scraper 2 is set with a hollow structure inside, in which a second spring 19 is set. The second spring 19 is a columnar structure, and circular blocks 21 are slidably arranged at both ends of the second spring 19 along the axial direction. An adjusting screw 22 is screwed to the center of the circular block 21. The adjusting screw 22 is rotatably arranged at the end of the swing rod. A transmission rod 23 is rotatably installed on the paving box 1. The transmission rod 23 and the adjusting screw 22 transmit power through a bevel gear structure. The transmission rod 23 and the main section 10 transmit power through a gear structure. When there is no need to adjust the distance between the rigid scraper 2 and the road surface, the gear structure between the transmission rod 23 and the main section 10 will mesh. When the second spring 19 is stretched, its pitch changes basically uniformly. Therefore, each intercepting rod 16 is installed on the second spring 19 by a buckle 20. In an optional embodiment, in order to prevent material from entering the swing rod of the rigid scraper 2 and affecting the extension and contraction of the second spring 19, each intercepting rod 16 is provided with a baffle 24, and the two baffles 24 corresponding to two adjacent intercepting rods 16 are stacked to block the channel on the swing rod through which the intercepting rod 16 passes. The two stacked baffles 24 will not hinder their respective axial movement.

[0034] As mentioned in the aforementioned embodiments, when using aggregates of different particle sizes, for large-diameter aggregates that need to be intercepted, the distance between adjacent intercepting bars 16 needs to be adjusted so that aggregates of suitable particle sizes are not blocked. For example, if the distance between two adjacent intercepting bars 16 is adjusted to 10 centimeters, then aggregates smaller than 10 centimeters can basically pass through smoothly. However, the shape and structure of the aggregates are not uniform or regular, and their positions on the road surface are also random. There are cases where the length is greater than 10 centimeters and the width is less than 10 centimeters. Thus, when such aggregates pass through the intercepting bars 16, two situations may occur: one is that the length direction of the aggregate is perpendicular to the moving direction of the intercepting bar 16, and the aggregate is intercepted horizontally by two adjacent intercepting bars 16; the other is that the length direction of the aggregate is parallel to the moving direction of the intercepting bar 16, and the aggregate can pass directly between two adjacent intercepting bars 16. In this way, in the subsequent process, the aggregate will exert a squeezing effect on the rigid scraper 2, causing the pressure sensor to detect the rigid scraper. If the large-diameter aggregate encountered by the scraper 2 cannot pass through due to the elastic yielding of the rigid scraper 2, then the operator needs to be alerted to stop the machine and clean up the large-diameter aggregate. Therefore, it can be seen that there are situations where large-diameter aggregate cannot be intercepted by the interceptor bar 16. The purpose of setting the interceptor bar 16 is to intercept large-diameter aggregate as much as possible to reduce the wear of the rigid scraper 2. As a result, the signal transmission frequency of the pressure sensor will also be greatly reduced. During this process, the pressure sensor detects the force on the rigid scraper 2, but does not encounter the problem of large-diameter material not being able to pass through. Therefore, there is no need to transmit the detected force signal of the rigid scraper 2 to the operator. That is, it can be understood that the signal of the rigid scraper force is not transmitted. Only when the large-diameter material that is not intercepted by the interceptor bar 16 squeezes the rigid scraper and the large-diameter aggregate cannot pass through due to the elastic yielding of the rigid scraper 2 will the force signal of the rigid scraper be transmitted to the operator.

[0035] It should be noted that in the aforementioned embodiments, the adjustment of the distance between the rigid scraper 2 and the road surface, as well as the adjustment of the distance between two adjacent interceptor bars 16, are carried out simultaneously from both ends of the width direction of the paving box 1. In the aforementioned embodiments, the structure of one end is described in detail, while the working principle of the other end is the same and will not be described in detail.

[0036] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A composite hydraulic material paving thickness adjustment device, used to adjust the distance between a rigid scraper and the road surface, comprising a paving box, wherein the rigid scraper is oscillatingly arranged at the bottom of the paving box, and a flexible scraper is also provided at the bottom of the paving box, characterized in that, The bottom of the paving box is provided with a winding rod for winding a flexible scraper. The paving box is also provided with a driving component. The end of the winding rod and the power output end of the driving component are transmitted through a worm gear mechanism. The bottom of the paving box is also equipped with an auxiliary scraper that swings synchronously with the rigid scraper. During the paving stroke, the auxiliary scraper tightens the flexible scraper.

2. The composite hydraulic material paving thickness adjustment device according to claim 1, characterized in that, The flexible scraper includes a main section and a tail section, and an insertion groove is provided at the junction of the main section and the tail section. The edge of the auxiliary scraper away from its own swing rod is inserted into the insertion groove.

3. The composite hydraulic material paving thickness adjustment device according to claim 1, characterized in that, The winding rod is equipped with a force detection mechanism, and the driving component drives the winding rod to rotate in real time based on the signal from the force detection mechanism.

4. The composite hydraulic material paving thickness adjustment device according to claim 3, characterized in that, The winding rod is equipped with a main gear at its end, and the auxiliary scraper and the swing rod of the rigid scraper are both equipped with secondary gears. The main gear meshes with a first rack, and the two secondary gears mesh with a second rack. An elastic element is provided between the second rack and the paving box. The first rack always remains meshed with the main gear, and when the first rack moves, it drives the second rack to move synchronously. The power output shaft of the driving component includes a main section connected to the driving source and a secondary section equipped with a worm gear. The main section is rotatably connected to the second rack. When there is no need to adjust the distance between the rigid scraper and the road surface, the second rack and the auxiliary gear are not fully engaged due to the elastic force of the elastic element, and the main section does not drive the auxiliary section to rotate. When it is necessary to adjust the distance between the rigid scraper and the road surface, the drive source first drives the main section to press down the second rack and fully engage with the auxiliary gear, and then drives the auxiliary section to rotate.

5. The composite hydraulic material paving thickness adjustment device according to claim 4, characterized in that, The second rack has a slot, and the first rack is located in the slot. The second rack slides on the first rack along the direction of the force applied to the second rack by the elastic element. The paving box is provided with a stop bar to prevent the first rack from disengaging completely from the main gear.

6. The composite hydraulic material paving thickness adjustment device according to claim 4, characterized in that, The elastic element includes a groove opened on the paving box, a top plate slidably disposed in the groove, a first spring disposed between the top plate and the paving box, and a second rack slidably disposed on the top plate in the direction that drives the secondary gear to rotate.

7. The composite hydraulic material paving thickness adjustment device according to claim 4, characterized in that, Several intercepting bars are arranged sequentially along the axial direction on the swing arm of the rigid scraper.

8. The composite hydraulic material paving thickness adjustment device according to claim 7, characterized in that, The intercepting bar has an arc-shaped structure and is equipped with a guide ramp and a placement groove. During the paving process, the guide ramp guides the large-diameter aggregate to the placement groove.

9. The composite hydraulic material paving thickness adjustment device according to claim 8, characterized in that, The rigid scraper has a hollow swing arm with a second spring inside. Each intercepting bar has a buckle that connects the corresponding intercepting bar to the second spring. When it is not necessary to adjust the distance between the rigid scraper and the road surface, the rotation of the main section causes the pitch of the second spring to change.

10. The composite hydraulic material paving thickness adjustment device according to claim 9, characterized in that, Each of the aforementioned interceptor bars is equipped with a baffle, and the two baffles corresponding to two adjacent interceptor bars are stacked together.

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