Paving machine matched material conveying device for road long and narrow pit
By designing a material conveying device for pavers, combined with a conveying and automatic cleaning mechanism, the problem of time-consuming and labor-intensive manual cleaning is solved, achieving the effects of automatic cleaning and preventing material waste.
Patent Information
- Application Number
- CN202310732150.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-20
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2043-06-20
AI Technical Summary
The existing paver material conveying device requires manual operation during cleaning, which is time-consuming and labor-intensive, increases the workload of workers, and reduces the cleaning rate.
A material conveying device for pavers with narrow potholes in roads has been designed. It includes a conveying mechanism and an automatic cleaning mechanism. Automatic cleaning is achieved by using components such as hydraulic cylinders, motors and eccentric wheels. The conveyor belt is cleaned by scrapers and cleaning brushes.
It enables automatic cleaning of conveyor belts, reduces manual operation, lowers the workload of workers, and increases the cleaning rate, while preventing material waste.
Smart Images

Figure CN116732848B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of paving machine auxiliary devices, in particular to a paving machine supporting material conveying device for road long and narrow trenches. BACKGROUND
[0002] The paving machine is a construction equipment mainly used for paving various materials on the base and surface layer of the highway. It is a system that cooperates with each other to complete the paving work, mainly including a walking system, a hydraulic system, a material conveying and distributing system, etc. The paving machine is a machine that uniformly spreads asphalt mixture on the road base and performs preliminary vibration and leveling, and is divided into two types of caterpillar type and tire type. It is composed of traction, paving and vibration, and ironing. The former includes a rack, a power device, a walking device, a hopper, a material door, a scraper conveyor, a spiral paving machine and a cab, etc. The latter includes a traction arm, a vibration mechanism and an ironing device. The paving machine uses a material conveying device to convey materials during paving, so that materials can be continuously conveyed for paving. In order to more conveniently convey materials to the hopper of the paving machine during paving of the long and narrow trenches of the road, a supporting material conveying device is needed.
[0003] The material conveying device in the prior art needs to be manually cleaned after conveying materials to prevent the materials inside the material conveying device from condensing. Manual cleaning is time-consuming and labor-intensive, thus increasing the work load of the workers and reducing the cleaning rate. SUMMARY
[0004] In view of the deficiencies of the prior art, the present application provides a paving machine supporting material conveying device for road long and narrow trenches, which solves the problems of time-consuming and labor-intensive manual cleaning of the material conveying device, increases the work load of the workers, and reduces the cleaning rate.
[0005] To achieve the above purpose, the present application is implemented by the following technical scheme: a paving machine supporting material conveying device for road long and narrow trenches, comprising a conveying mechanism, the conveying mechanism is connected with an automatic cleaning mechanism, the front bottom of the conveying mechanism is fixedly connected with a material scraping mechanism;
[0006] The conveying mechanism includes a housing, a motor fixedly connected to the bottom of the housing, a drive roller rotatably connected to the rear side of the housing, the output end of the motor connected to the right side of the drive roller via a belt, a driven roller rotatably connected to the front side of the housing, a conveyor belt disposed between the drive roller and the driven roller, a rotating arm rotatably connected to the front side of the housing, a mounting block rotatably connected to the rear side of the rotating arm rotatably, a hydraulic cylinder rotatably connected to the rear side of the mounting block, a hydraulic cylinder 2 fixedly connected to the top rear side of the mounting block, a triangular drive frame rotatably connected to the output end of the hydraulic cylinder 2, and rotating arms 2 rotatably connected to both the left and right sides of the middle part of the housing, with the left and right sides of the triangular drive frame rotatably connected to the opposite sides of the two rotating arms 2 respectively.
[0007] Preferably, the automatic cleaning mechanism includes an eccentric wheel, a connecting rod rotatably connected to the outer side of the eccentric wheel, a push-pull rod rotatably connected to the other end of the connecting rod, a slide bar fixedly connected to the other end of the push-pull rod, a rack fixedly connected to the top of the slide bar, a bidirectional threaded rod rotatably connected to the middle of the outer shell, a gear fixedly connected to the left side of the bidirectional threaded rod, movable plates threadedly connected to both sides of the bidirectional threaded rod, a limit post fixedly connected to the side of the movable plate near the outer shell, a mounting box fixedly connected to the other end of the limit post, a mounting groove provided inside the mounting box, multiple springs fixedly connected inside the mounting groove, a limit plate slidably connected inside the mounting groove, a connecting plate fixedly connected to the bottom of the limit plate, and a cleaning brush fixedly connected to the bottom of the connecting plate.
[0008] Preferably, the scraping mechanism includes a fixed frame, the fixed frame has two receiving slots inside, a second spring is fixedly connected to the bottom of the receiving slot, a sliding plate is fixedly connected to the top of the second spring, a connecting column is fixedly connected to the top of the sliding plate, and scrapers are fixedly connected to the tops of the two connecting columns.
[0009] Preferably, a baffle is fixedly connected to the rear side of the outer casing, and the output end of the first hydraulic cylinder is rotatably connected to the middle of the first rotating arm.
[0010] Preferably, a limiting sleeve is fixedly connected to the left side of the outer casing, and the push-pull rod is slidably connected inside the limiting sleeve.
[0011] Preferably, three mounting plates are fixedly connected to the left side of the outer casing, and a fixing block is fixedly connected to the top of the three mounting plates.
[0012] Preferably, the gear and the rack are meshed, and the two limiting posts are slidably connected inside the left and right sides of the outer casing, respectively.
[0013] Preferably, the fixing block has a groove inside, and the slide bar is slidably connected inside the groove.
[0014] Preferably, the bottom of each of the plurality of springs is fixedly connected to the top of the limiting plate.
[0015] Preferably, the sliding plate is slidably connected inside the receiving groove, and the connecting column extends through the top of the fixing frame.
[0016] Working Principle: During material conveying, the mounting block is first installed on the paver. Activating hydraulic cylinder one extends the output end, causing rotating arm one to rotate downwards, thus moving the front end of the outer casing downwards. Activating hydraulic cylinder two then rotates the triangular drive frame, which in turn rotates rotating arm two, adjusting the outer casing's angle for convenient material conveying. The motor then rotates, driving the drive roller, which in turn drives the conveyor belt, thus conveying material. During conveying, because the fixed frame is fixed to the front of the outer casing, internal spring two exerts an upward force on the sliding plate, transmitting this force to the connecting column. The upward force from the connecting column is then transmitted to the scraper, causing the scraper to adhere tightly to the outside of the conveyor belt, thus using the scraper to move material onto the conveyor belt. The attached material is scraped off and falls into the hopper of the paver to prevent waste. During cleaning, the motor is started, which drives the conveyor belt and eccentric wheel. The eccentric wheel's rotation drives the connecting rod, which in turn pushes the push-pull rod back and forth. This movement of the push-pull rod causes the sliding strip to move back and forth within the chute. The sliding strip's movement then drives the rack, which in turn drives the gear, which in turn drives the bidirectional threaded rod. This bidirectional threaded rod, limited by the limiting post, causes the moving plate to move continuously towards the center and outwards, thus moving the mounting box towards the center and outwards. This effectively washes the conveyor belt, and the rotating conveyor belt itself further cleans it, thus automatically cleaning the material conveying device.
[0017] This invention provides a material conveying device for pavers used in narrow, pothole-riding roads. It offers the following advantages:
[0018] 1. This invention uses the rotation of the active roller to drive the eccentric wheel to rotate, which in turn drives the connecting rod to rotate. This, in turn, drives the push-pull rod to move back and forth, which in turn drives the moving plate to move, thereby driving the cleaning brush to move. Therefore, it can automatically clean the transmission belt, eliminating the need for manual cleaning, saving time and effort, reducing the workload of workers, and increasing the cleaning speed.
[0019] 2. The present invention utilizes the rotation of the conveyor belt to continuously push the sliding plate upwards via a spring, thereby ensuring that the scraper adheres tightly to the outside of the conveyor belt. This effectively scrapes off the material adhering to the conveyor belt, preventing material waste and preventing the material from sticking to the outer casing as the conveyor belt rotates, thus avoiding difficulty in cleaning. Attached Figure Description
[0020] Figure 1 This is a perspective view of the present invention;
[0021] Figure 2 This is a schematic diagram of the eccentric wheel in this invention;
[0022] Figure 3 This is a schematic diagram of the bidirectional threaded rod in this invention;
[0023] Figure 4 This is a schematic diagram of the groove in the present invention;
[0024] Figure 5 This is a schematic diagram of the slider in this invention;
[0025] Figure 6 This is a schematic diagram of the fixing frame in this invention;
[0026] Figure 7 This is a schematic diagram of the mounting box in this invention.
[0027] Among them, 1. Conveying mechanism; 101. Housing; 102. Motor; 103. Conveyor belt; 104. Rotating arm one; 105. Mounting block; 106. Hydraulic cylinder one; 107. Hydraulic cylinder two; 108. Triangular drive frame; 109. Rotating arm two; 110. Baffle; 111. Drive roller; 112. Driven roller; 2. Automatic cleaning mechanism; 201. Eccentric wheel; 202. Connecting rod; 203. Push-pull rod; 204. Mounting plate; 205. Fixing block; 206. 1. Slide groove; 207. Slide bar; 208. Rack; 209. Double-sided threaded rod; 210. Gear; 211. Limit sleeve; 212. Moving plate; 213. Limit post; 214. Mounting box; 215. Mounting groove; 216. Spring 1; 217. Limit plate; 218. Connecting plate; 219. Cleaning brush; 3. Scraping mechanism; 301. Fixing frame; 302. Receiving groove; 303. Spring 2; 304. Sliding plate; 305. Connecting post; 306. Scraper. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] Example:
[0030] Please see the appendix Figure 1 - Appendix Figure 7 The present invention provides a material conveying device for a paver for narrow potholes in roads, including a conveying mechanism 1, which is connected to an automatic cleaning mechanism 2, and a scraping mechanism 3 is fixedly connected to the bottom front side of the conveying mechanism 1.
[0031] The conveying mechanism 1 enables material conveying and adjustment of the conveying angle, facilitating the dumping of materials onto the conveying device. This makes it convenient for pavers to dump materials in narrow, potholed roads. The automatic cleaning mechanism 2 automatically cleans the conveyor belt 103 after the motor 102 starts, eliminating the need for manual cleaning, saving time and effort, and reducing the workload of workers. The scraping mechanism 3 scrapes off the material adhering to the conveyor belt 103 during conveying, saving material and preventing material from sticking to the outer casing 101 as the conveyor belt 103 rotates, making it difficult to clean.
[0032] The conveying mechanism 1 includes a housing 101. A motor 102 is fixedly connected to the bottom of the housing 101. A drive roller 111 is rotatably connected to the rear side of the housing 101. The output end of the motor 102 is connected to the right side of the drive roller 111 via a belt. A driven roller 112 is rotatably connected to the front side of the housing 101. A conveyor belt 103 is provided between the drive roller 111 and the driven roller 112. A rotating arm 104 is rotatably connected to the front side of the housing 101. A mounting block 105 is rotatably connected to the rear side of the rotating arm 104. A hydraulic cylinder 106 is rotatably connected to the rear side of the mounting block 105. A hydraulic cylinder 107 is fixedly connected to the top rear side of the mounting block 105. A triangular drive frame 108 is rotatably connected to the output end of the hydraulic cylinder 107. A rotating arm 109 is rotatably connected to both the left and right sides of the middle part of the housing 101. The left and right sides of the triangular drive frame 108 are respectively rotatably connected to the opposite sides of the two rotating arms 109.
[0033] By installing the mounting block 105 on the paver and activating hydraulic cylinder 106, the output end of hydraulic cylinder 106 extends, driving rotating arm 104 to rotate downwards. This causes the front end of the outer casing 101 to move downwards. Then, activating hydraulic cylinder 107 drives triangular drive frame 108 to rotate. The rotation of triangular drive frame 108 drives rotating arm 109 to rotate, adjusting the angle of the outer casing 101 for convenient material conveying. Simultaneously, activating motor 102 drives drive roller 111 to rotate, which in turn drives conveyor belt 103, thus conveying material. The function of the outer casing 101 is to lift... The system provides installation space and, via motor 102, provides power for conveying materials and cleaning the conveyor belt 103. The conveyor belt 103 is used to transport materials. The rotating arm 104 provides a rotation position and facilitates the installation of the housing 101. The mounting block 105 provides an installation position and also allows the rotating arm 104 to rotate. The hydraulic cylinder 106 drives the housing 101 to make large-angle adjustments. The hydraulic cylinder 107 allows for small-angle adjustments of the housing 101, thus facilitating angle adjustment. The baffle 110 prevents materials from falling downwards. The drive roller 111 provides power for the rotation of the conveyor belt 103. The driven roller 112 works in conjunction with the drive roller 111 to make the conveyor belt 103 rotate.
[0034] The automatic cleaning mechanism 2 includes an eccentric wheel 201, a connecting rod 202 rotatably connected to the outer side of the eccentric wheel 201, a push-pull rod 203 rotatably connected to the other end of the connecting rod 202, a slide bar 207 fixedly connected to the other end of the push-pull rod 203, a rack 208 fixedly connected to the top of the slide bar 207, a bidirectional threaded rod 209 rotatably connected to the middle of the outer casing 101, a gear 210 fixedly connected to the left side of the bidirectional threaded rod 209, and a sliding gear 210 threaded to both the left and right sides of the bidirectional threaded rod 209. The movable plate 212 is fixedly connected to a limiting post 213 on one side near the outer shell 101. The other end of the limiting post 213 is fixedly connected to a mounting box 214. The mounting box 214 has a mounting groove 215 inside. Multiple springs 216 are fixedly connected inside the mounting groove 215. A limiting plate 217 is slidably connected inside the mounting groove 215. A connecting plate 218 is fixedly connected to the bottom of the limiting plate 217. A cleaning brush 219 is fixedly connected to the bottom of the connecting plate 218.
[0035] The rotation of motor 102 drives eccentric wheel 201 to rotate. When eccentric wheel 201 rotates, it drives connecting rod 202 to rotate, which in turn pushes push rod 203 back and forth. The back and forth movement of push rod 203 drives slide bar 207 to move back and forth inside slide groove 206. The back and forth movement of slide bar 207 drives rack 208 to move back and forth. The back and forth movement of rack 208 drives gear 210 to rotate back and forth. The back and forth rotation of gear 210 drives bidirectional threaded rod 209 to move back and forth. After 209 moves back and forth, it can drive the moving plate 212 to move continuously towards the center and the outside under the limit of the limiting post 213, thereby driving the mounting box 214 to move continuously towards the center and the outside, thus achieving the washing of the conveyor belt 103. At the same time, since the conveyor belt 103 is also rotating, it can be washed, thus completing the automatic cleaning of the material conveying device. The rotation of the eccentric wheel 201 can drive the connecting rod 202 to rotate, and the rotation of the connecting rod 202 can drive the push-pull rod 203 to move. The push-pull rod 203 drives the slide bar 207 to move back and forth. The mounting plate 204 mounts the fixing block 205, which has a groove 206 inside to restrict the movement trajectory of the slide bar 207. The rack 208 drives the gear 210 to rotate, which in turn drives the double-threaded rod 209 to rotate. The rotation of the double-threaded rod 209 then drives the moving plate 212 to move. The limiting post 213 restricts the movement of the moving plate 212. The movable plate 212 does not rotate with the bidirectional threaded rod 209, thus allowing the movable plate 212 to move back and forth. At the same time, the limiting post 213 can install the mounting box 214, which provides the installation position. The spring 216 can use its elasticity to give the limiting plate 217 a downward force, which can be transmitted to the connecting plate 218 and then to the cleaning brush 219, so that the cleaning brush 219 can be tightly attached to the conveyor belt 103, thus facilitating the cleaning of the conveyor belt 103.
[0036] The scraping mechanism 3 includes a fixed frame 301. The fixed frame 301 has two receiving grooves 302 inside. A second spring 303 is fixedly connected to the bottom of the receiving groove 302. A sliding plate 304 is fixedly connected to the top of the second spring 303. A connecting column 305 is fixedly connected to the top of the sliding plate 304. Scrapers 306 are fixedly connected to the top of the two connecting columns 305.
[0037] While the conveyor belt 103 rotates, the spring 303 inside the receiving groove 302 applies an upward force to the sliding plate 304, which is then transmitted to the connecting column 305. The upward force from the connecting column 305 is transmitted to the scraper 306, causing the scraper 306 to adhere tightly to the outside of the conveyor belt 103. This allows the scraper 306 to scrape off the material adhering to the conveyor belt 103 and drop it into the hopper of the paver, preventing material waste. The fixing frame 301 provides the installation location. Meanwhile, the fixing bracket 301 can also be installed on the front bottom of the housing 101. The receiving groove 302 can provide space for installation and sliding. The function of the sliding plate 304 is to prevent the connecting column 305 from moving out of the receiving groove 302. At the same time, the function of the spring 303 is to use its own elasticity to push the sliding plate 304 upward, thereby transmitting the force to the connecting column 305. The force on the connecting column 305 pushes the scraper 306 upward, thereby making the scraper 306 closely adhere to the outside of the conveyor belt 103.
[0038] A baffle 110 is fixedly connected to the rear side of the outer casing 101. The output end of the hydraulic cylinder 106 is rotatably connected to the middle of the rotating arm 104. A limit sleeve 211 is fixedly connected to the left side of the outer casing 101. A push-pull rod 203 is slidably connected inside the limit sleeve 211. Three mounting plates 204 are fixedly connected to the left side of the outer casing 101. A fixing block 205 is fixedly connected to the top of the three mounting plates 204. The gear 210 and the rack 208 are meshed. Two limit posts 213 are slidably connected to the inside of the left and right sides of the outer casing 101, respectively.
[0039] The baffle 110 prevents material from falling, thus preventing material from accumulating and falling off the conveyor belt 103 when it is being poured onto the conveyor belt 103. The output end of hydraulic cylinder 106 is rotatably connected to the middle of rotating arm 104. The extension of the output end of hydraulic cylinder 106 drives rotating arm 104 to rotate, thereby rotating the outer casing 101 and adjusting its angle. Furthermore, hydraulic cylinder 107 pulls the triangular drive frame 108, further rotating the outer casing 101, allowing for better angle receiving and transport of materials. The paver, which can easily transport materials in long, narrow potholes, uses a limiting sleeve 211 to support the push-pull rod 203, thereby increasing the stability of the push-pull rod 203 when it moves back and forth. The limiting sleeve 211 also restricts the movement trajectory of the push-pull rod 203. The mounting plate 204 provides the installation position so that the fixing block 205 can be installed on top of the limiting sleeve 211, thereby providing stability for the fixing block 205. Through the meshing connection between the gear 210 and the rack 208, the rack 208 drives the gear 210 to rotate, thereby causing the bidirectional threaded rod 209 to rotate.
[0040] The fixed block 205 has a groove 206 inside, and the slide bar 207 is slidably connected inside the groove 206.
[0041] The function of the groove 206 is to provide a sliding position for the slider 207 and to limit the movement of the slider 207.
[0042] The bottoms of multiple springs 216 are fixedly connected to the top of the limiting plate 217.
[0043] The bottom of spring 216 is fixedly connected to the top of the limiting plate 217 so that the limiting plate 217 can be used to maintain the stability of spring 216, thereby increasing the service life of spring 216.
[0044] The sliding plate 304 is slidably connected inside the receiving groove 302, and the connecting column 305 passes through the top of the fixing frame 301.
[0045] The sliding plate 304 is slidably connected inside the receiving groove 302, thereby enabling the movement of the chute 206, which in turn facilitates the scraper 306 to press tightly against the outside of the conveyor belt 103. The connecting column 305 passes through the top of the fixed frame 301, enabling the connecting column 305 to slide inside the fixed frame 301.
[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A material conveying device for pavers used in narrow potholes in roads, comprising a conveying mechanism (1), characterized in that, The conveying mechanism (1) is connected to the automatic cleaning mechanism (2), and a scraping mechanism (3) is fixedly connected to the bottom front side of the conveying mechanism (1); The conveying mechanism (1) includes a housing (101), a motor (102) is fixedly connected to the bottom of the housing (101), a drive roller (111) is rotatably connected to the rear side of the housing (101), the output end of the motor (102) is connected to the right side of the drive roller (111) via a belt, a driven roller (112) is rotatably connected to the front side of the housing (101), a conveyor belt (103) is provided between the drive roller (111) and the driven roller (112), and a rotating arm (104) is rotatably connected to the front side of the housing (101). The rear side of the rotating arm (104) is rotatably connected to a mounting block (105), the rear side of the mounting block (105) is rotatably connected to a hydraulic cylinder (106), the top rear side of the mounting block (105) is fixedly connected to a hydraulic cylinder (107), the output end of the hydraulic cylinder (107) is rotatably connected to a triangular drive frame (108), the middle left and right sides of the outer shell (101) are rotatably connected to rotating arms (109), the left and right sides of the triangular drive frame (108) are respectively rotatably connected to the opposite sides of the two rotating arms (109); The automatic cleaning mechanism (2) includes an eccentric wheel (201), a connecting rod (202) rotatably connected to the outer side of the eccentric wheel (201), a push-pull rod (203) rotatably connected to the other end of the connecting rod (202), a slide bar (207) fixedly connected to the other end of the push-pull rod (203), a rack (208) fixedly connected to the top of the slide bar (207), a bidirectional threaded rod (209) rotatably connected to the middle of the outer shell (101), a gear (210) fixedly connected to the left side of the bidirectional threaded rod (209), and a sliding gear (210) threaded to both the left and right sides of the bidirectional threaded rod (209). A movable plate (212) is fixedly connected to a limiting post (213) on one side of the movable plate (212) near the outer shell (101). The other end of the limiting post (213) is fixedly connected to an installation box (214). An installation groove (215) is provided inside the installation box (214). A plurality of springs (216) are fixedly connected inside the installation groove (215). A limiting plate (217) is slidably connected inside the installation groove (215). A connecting plate (218) is fixedly connected to the bottom of the limiting plate (217). A cleaning brush (219) is fixedly connected to the bottom of the connecting plate (218). The scraping mechanism (3) includes a fixed frame (301), and the fixed frame (301) has two receiving slots (302) inside. A second spring (303) is fixedly connected to the bottom of the receiving slot (302), a sliding plate (304) is fixedly connected to the top of the second spring (303), a connecting column (305) is fixedly connected to the top of the sliding plate (304), and a scraper (306) is fixedly connected to the top of the two connecting columns (305).
2. The material conveying device for a paver used in narrow potholes in roads according to claim 1, characterized in that, A baffle (110) is fixedly connected to the rear side of the outer shell (101), and the output end of the hydraulic cylinder (106) is rotatably connected to the middle of the rotating arm (104).
3. The material conveying device for a paver used in narrow potholes in roads according to claim 2, characterized in that, A limiting sleeve (211) is fixedly connected to the left side of the outer shell (101), and the push-pull rod (203) is slidably connected inside the limiting sleeve (211).
4. The material conveying device for a paver used in narrow potholes in roads according to claim 1, characterized in that, Three mounting plates (204) are fixedly connected to the left side of the outer casing (101), and a fixing block (205) is fixedly connected to the top of the three mounting plates (204).
5. The paver conveying device for narrow potholes in roads according to claim 1, characterized in that, The gear (210) and rack (208) are meshed together, and the two limiting posts (213) are slidably connected to the left and right sides of the outer shell (101).
6. The paver conveying device for narrow potholes in roads according to claim 4, characterized in that, The fixed block (205) has a groove (206) inside, and the slide bar (207) is slidably connected inside the groove (206).
7. The paver conveying device for narrow potholes in roads according to claim 1, characterized in that, The bottom of each of the springs (216) is fixedly connected to the top of the limiting plate (217).
8. The paver conveying device for narrow potholes in roads according to claim 1, characterized in that, The sliding plate (304) is slidably connected inside the receiving groove (302), and the connecting column (305) passes through the top of the fixing frame (301).
Citation Information
Patent Citations
High-low moving material conveying cart
CN104304092A
Continuous feeding device of paver
CN114476705A