High-wading-strength lower protection plate and surface sediment adhesion prevention structure thereof
The rubber strip structure, driven by a motor to rotate the inner cylinder, combined with a damper and guide components, solves the problem of mud and sand adhesion on the lower guard plate under high water immersion intensity, achieving effective mud and sand cleaning and protection functions, and ensuring the normal use of the lower guard plate.
Patent Information
- Application Number
- CN202511817763.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-02-24
AI Technical Summary
Existing high-water-strength underbody protection plates are prone to accumulating mud and sand during use, causing blockage of the drainage holes. Existing cleaning methods can easily allow mud and sand to enter the gaps, damaging the engine.
Design a structure including an inner cylinder, an outer cylinder, and rubber strips. The inner cylinder is driven to rotate by a motor, and the rubber strips strike the lower guard plate to vibrate and shake off mud and sand. Combined with a damper and a guide assembly, the rubber strips are controlled to be stored and prevented from tangling. Intermittent rinsing is achieved using a cleaning component.
It effectively prevents mud and sand from adhering, prevents gaps from clogging, ensures the protective and drainage functions of the lower guard plate, and reduces damage during the cleaning process.
Smart Images
Figure CN121553071A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of automotive technology, and in particular relates to a high wading strength lower guard plate and its surface anti-mud and sand adhesion structure. Background Technology
[0002] An engine underbody skid plate (also known as an engine skid plate) is a protective device installed at the bottom of a car engine. Its main function is to protect the engine from external damage such as protruding stones, mud, and sewage from the road surface.12 Through its 3D integrated design, it provides all-around protection for the engine, preventing damage caused by uneven road surfaces or small stones during driving. High-water-strength underbody skid plates are specifically designed to handle deep water or complex wading conditions. Their core requirements are to ensure safety and drainage during wading while providing protection. During use, the underbody skid plate frequently comes into contact with mud and sand, making it prone to accumulating mud and sand. To prevent clogging of the drainage holes, the underbody skid plate needs to be cleaned regularly, usually by rinsing with water. However, this method can easily cause mud and sand to flow into the gaps of the underbody skid plate, potentially damaging the engine. This paper proposes a structure that can prevent mud and sand from adhering to the underbody skid plate. Summary of the Invention
[0003] To address the shortcomings of existing technologies, this invention provides a high-strength water-resistant lower guard plate and its surface anti-mud and sand adhesion structure, thus solving the aforementioned problems.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-water-strength underbody protection plate and its surface anti-mud and sand adhesion structure, comprising an inner cylinder and a connecting assembly. The outer wall of the inner cylinder is symmetrically provided with multiple spiral grooves, with each spiral groove having two ends located at opposite ends of the inner cylinder. A rubber strip of equal length is provided within each spiral groove, with the left end of the rubber strip fixedly connected to the spiral groove. An outer cylinder is coaxially arranged on the side of the inner cylinder, with an opening at the end of the outer cylinder closest to the inner cylinder. Multiple slots are symmetrically arranged at the open end of the outer cylinder, with the positions of the slots corresponding to the positions of the spiral grooves. An insert block corresponding to each slot is fixedly connected to the inner wall of the outer cylinder. The length and width of the insert block are equal, and the insert block can be inserted into its corresponding spiral groove. The insert block is used to press the rubber strip into the spiral groove. The connecting assembly is used to stop the outer cylinder and the inner cylinder from rotating synchronously.
[0005] A further technical solution: the end of the outer cylinder away from the inner cylinder is rotatably mounted on a sliding mounting base, and a damper is provided at the connection between the outer cylinder and the sliding mounting base. The sliding mounting base is slidably mounted on the lower guard plate. The end of the inner cylinder away from the outer cylinder is fixedly connected to the output shaft of the motor, and the motor is coaxially fixedly connected to a fixed mounting base. The fixed mounting base is fixedly mounted on the lower guard plate.
[0006] Further technical solution: The connecting assembly includes a cylinder and a guide assembly. The cylinder is fixedly connected inside the inner cylinder, and an inner liner is coaxially arranged inside the cylinder. The outer wall of the inner liner is symmetrically provided with multiple sliding grooves, and the inner wall of the cylinder is symmetrically provided with multiple sliding rods, which are slidably arranged in the sliding grooves. The guide assembly is used to detach the inner liner from the cylinder.
[0007] A further technical solution: A guide rod is coaxially fixedly connected to one end of the inner liner near the inner cylinder, and the diameter of the guide rod is smaller than the diameter of the inner liner. The guide rod passes through a through hole on the surface of the inner cylinder, and the other end of the guide rod is fixedly connected to the inner wall of the outer cylinder.
[0008] A further technical solution: The guide assembly includes a slider, the end of the inner liner outside the cylinder is rotatably disposed at the slider shaft center, and the slider is threadedly connected to the lead screw, and the slider is slidably disposed on the limiting rod, and the slider is threadedly connected to the lead screw, and the slider is slidably disposed on the limiting rod.
[0009] A further technical solution: one end of the lead screw is rotatably connected to the inner cylinder, the other end of the lead screw is fixedly connected to the output shaft of the motor, the motor is fixedly connected to the inner cylinder, and the limiting rod is fixedly connected to the inner cylinder.
[0010] A further technical solution: The outer wall of the slider is provided with a cleaning component for cleaning the spiral groove. The cleaning component includes a connecting ring and a sealing component. The connecting ring is coaxially fixedly connected to the outer wall of the slider and threadedly connected to the inner wall of the inner spiral cylinder. The inner spiral cylinder is coaxially disposed inside the inner cylinder, and both ends of the inner spiral cylinder are open and rotatably connected to both ends of the inner cylinder. The outer wall of the inner spiral cylinder is fixedly connected with a protrusion. The sealing component is used to allow water in the inner cylinder to intermittently flush the spiral groove.
[0011] A further technical solution: The sealing assembly includes an arc plate, which is used to seal the through hole on the spiral groove that connects to the inner wall of the inner cylinder. The arc plate is in close contact with the inner wall of the inner cylinder, and the two ends of the arc plate are fixedly connected to the corresponding frame. The frame is fixedly connected to the outer wall of the inner spiral cylinder.
[0012] Beneficial effects This invention provides a high-strength water-resistant lower guard plate and its surface anti-mud and sand adhesion structure, which has the following advantages compared with the prior art: 1. The user starts the motor, causing the inner cylinder fixedly connected to its output shaft to rotate. Since the inner liner is inside the cylinder, it rotates synchronously with the cylinder under the action of the sliding groove and the sliding rod. This causes the guide rod to rotate at a uniform speed with the inner liner, meaning the outer cylinder starts rotating synchronously with the inner cylinder. The high-speed rotation of the inner cylinder causes the rubber strip fixedly connected to it to rotate around the inner cylinder as a fulcrum. This rubber strip then strikes the lower guard plate, causing it to vibrate and shake off the attached mud and sand. This prevents mud and sand from entering the surface of the lower guard plate with the water flow during rinsing. Once the mud and sand are cleaned, the user can start the inner liner to slide, gradually detaching it from the cylinder. This allows the sliding groove and the sliding rod to slide relative to each other. Once the sliding groove and the sliding rod are detached, the inner liner can no longer rotate synchronously with the cylinder. At this point, the outer cylinder... The damper at the connection with the sliding mounting base stops the rotation. Simultaneously, as the slide groove disengages from the slide rod, the slide rod gradually contacts its corresponding rubber strip. Because the rubber strip is close to the end of the inner cylinder, it does not deform even at high speeds, allowing the slot to engage with the rubber strip. At this point, the slide groove disengages from the slide rod, stopping the outer cylinder. During this process, the inner liner remains in a sliding state, pushing the rubber strip held in place by the outer cylinder. Since the rubber strip is still rotating under the influence of the inner cylinder, the push from the linearly moving outer cylinder allows the rubber strip to conform to the spiral groove. Furthermore, because the insert block slides into the spiral groove during this process, it further presses the rubber strip into the groove, thus storing longer rubber strips on the inner cylinder and effectively preventing multiple rubber strips from tangling.
[0013] 2. The user can start the motor connected by the lead screw to make it rotate at a constant speed, which will cause the threaded connecting ring on it to start linear motion. At this time, the connecting ring begins to slide inside the rotating inner cylinder. Since the slider is rotatably set inside the connecting ring, the connecting ring can drive the slider to make linear motion while preventing the slider from rotating synchronously with the inner cylinder. This will pull the inner liner cylinder out of the cylinder, so that the outer cylinder can maintain synchronous rotation with the inner cylinder before contacting the rubber strip, so that the rubber strip can be inserted into the groove. After the outer cylinder contacts the rubber strip, the synchronous rotation between the outer cylinder and the inner cylinder will stop, so that the rubber strip can be pressed into the spiral groove. This is the technical effect. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0015] Figure 2 This is a schematic cross-sectional view of the present invention.
[0016] Figure 3 This is a schematic diagram of another cross-sectional structure of the present invention.
[0017] Figure 4 This is a side view cross-sectional structural diagram of the present invention.
[0018] Figure 5 This is a schematic diagram of the internal structure of the present invention.
[0019] Figure 6 This is a schematic diagram of another internal structure of the present invention.
[0020] Figure 7 This is a schematic diagram of the lower protective plate structure of the present invention.
[0021] Reference numerals in the attached drawings: Inner cylinder 101, lower guard plate 102, drain hole 103, water channel 104, spiral groove 201, rubber strip 202, outer cylinder 203, slot 204, insert block 205, sliding mounting base 206, fixed mounting base 207, motor 208, guide rod 209, cylinder body 301, inner lining cylinder 302, sliding groove 303, sliding rod 304, slider 305, connecting ring 306, limit rod 307, lead screw 308, inner screw cylinder 309, protrusion 401, frame 402, arc plate 403. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0023] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.
[0024] Please see Figures 1-7 This invention provides a high-water-strength underbody protection plate and its surface anti-mud and sand adhesion structure, comprising an inner cylinder 101 and connecting components. The outer wall of the inner cylinder 101 is symmetrically provided with multiple spiral grooves 201, with each spiral groove 201 having its two ends located at opposite ends of the inner cylinder 101. Each spiral groove 201 contains a rubber strip 202 of equal length, with the left end of the rubber strip 202 fixedly connected to the spiral groove 201. An outer cylinder 203 is coaxially disposed on the side of the inner cylinder 101. The outer cylinder 203 has an opening at one end near the inner cylinder 101, and a plurality of slots 204 are fixedly and symmetrically arranged at the opening end of the outer cylinder 203. The positions of the slots 204 correspond to the positions of the spiral grooves 201. The inner wall of the outer cylinder 203 is fixedly connected with a plug 205 corresponding to the slots 204. The length and width of the plug 205 are equal, and the plug 205 can be inserted into the corresponding spiral groove 201. The plug 205 is used to press the adhesive strip 202 into the spiral groove 201. The connecting component is used to stop the outer cylinder 203 and the inner cylinder 101 from rotating synchronously.
[0025] Specifically, a high water-resistant lower guard plate includes a lower guard plate 102, on which a plurality of water-falling holes 103 and a water flow channel 104 are provided.
[0026] Specifically, the outer cylinder 203 is rotatably mounted on the sliding mounting base 206 at one end away from the inner cylinder 101, and a damper is provided at the connection between the outer cylinder 203 and the sliding mounting base 206. The sliding mounting base 206 is slidably mounted on the lower guard plate 102. The inner cylinder 101 is fixedly connected to the output shaft of the motor 208 at one end away from the outer cylinder 203, and the motor 208 is coaxially fixedly connected to the fixed mounting base 207. The fixed mounting base 207 is fixedly mounted on the lower guard plate 102.
[0027] Specifically, the connecting assembly includes a cylindrical body 301 and a guiding assembly. The cylindrical body 301 is fixedly connected inside the inner cylinder 101, and an inner liner 302 is coaxially arranged inside the cylindrical body 301. A plurality of sliding grooves 303 are symmetrically arranged on the outer wall of the inner liner 302, and a plurality of sliding rods 304 are symmetrically arranged on the inner wall of the cylindrical body 301. The sliding rods 304 are slidably arranged in the sliding grooves 303. The guide assembly is used to detach the inner liner 302 from the cylinder 301.
[0028] Specifically, a guide rod 209 is coaxially fixedly connected to one end of the inner liner 302 near the inner cylinder 101, and the diameter of the guide rod 209 is smaller than the diameter of the inner liner 302. The guide rod 209 passes through a through hole on the surface of the inner cylinder 101, and the other end of the guide rod 209 is fixedly connected to the inner wall of the outer cylinder 203.
[0029] In the above embodiment, the user starts the motor 208, causing the inner cylinder 101 fixedly connected to its output shaft to start rotating. Since the inner liner 302 is inside the cylinder 301 at this time, under the action of the slide groove 303 and the slide rod 304, the inner liner 302 and the cylinder 301 can rotate synchronously, causing the guide rod 209 to start rotating at a constant speed with the inner liner 302 fixedly connected to it. That is, at this time, the outer cylinder 203 starts to rotate synchronously with the inner cylinder 101. Thus, the high-speed rotation of the inner cylinder 101 causes the rubber strip 202 fixedly connected to it to use the inner cylinder 101 as a fulcrum. The rotation causes the rubber strip 202 to strike the lower guard plate 102, vibrating it and shaking off the attached mud and sand. This prevents the mud and sand from entering the surface of the lower guard plate 102 with the water flow during rinsing. Once the mud and sand are cleaned, the user can start to slide the inner liner 302, gradually disengaging it from the cylinder 301. This allows the sliding groove 303 and the sliding rod 304 to slide relative to each other. When the sliding groove 303 and the sliding rod 304 are disengaged, the inner liner 302 can no longer rotate synchronously with the cylinder 301. Under the action of the damper at the connection between the outer cylinder 203 and the sliding mounting base 206, the outer cylinder 203 stops rotating. Simultaneously, as the sliding groove 303 disengages from the sliding rod 304, the sliding rod 304 gradually contacts its corresponding rubber strip 202. Since the rubber strip 202 is close to the end of the inner cylinder 101, it will not deform even under high-speed rotation. Therefore, the locking groove 204 can lock onto the rubber strip 202. At this time, the sliding groove 303 disengages from the sliding rod 304, thus stopping the outer cylinder 203. During this process, the inner liner 302 remains in a sliding state, thereby allowing the outer cylinder 203 to pass through... 03. Start pushing the adhesive strip 202 that is stuck on it. Since the adhesive strip 202 is still rotating under the drive of the inner cylinder 101, the outer cylinder 203, which can only move linearly, can push the adhesive strip 202 into the spiral groove 201. Since the insert block 205 can slide into the spiral groove 201 during this process, the adhesive strip 202 can be further pressed into the spiral groove 201 by the insert block 205, so that the long adhesive strip 202 can be stored on the inner cylinder 101, and at the same time, multiple adhesive strips 202 can be effectively prevented from tangling together.
[0030] Specifically, the guide assembly includes a slider 305. The end of the inner liner 302 located outside the cylinder 301 is rotatably disposed at the axis of the slider 305. The slider 305 is threadedly connected to the lead screw 308. The slider 305 is slidably disposed on the limiting rod 307.
[0031] Specifically, one end of the lead screw 308 is rotatably connected to the inner cylinder 101, the other end of the lead screw 308 is fixedly connected to the output shaft of the motor, the motor is fixedly connected to the inner cylinder 101, and the limiting rod 307 is fixedly connected to the inner cylinder 101.
[0032] In the above embodiment, the user can start the motor connected to the lead screw 308 to make it rotate at a constant speed, thereby causing the threaded connecting ring 306 to begin linear motion. At this time, the connecting ring 306 begins to slide within the rotating inner cylinder 101. Since the slider 305 is rotatably set within the connecting ring 306, the connecting ring 306 can drive the slider 305 to perform linear motion while preventing the slider 305 from rotating synchronously with the inner cylinder 101. This pulls the inner liner 302 away from the cylinder 301, so that the outer cylinder 203 can maintain synchronous rotation with the inner cylinder 101 before contacting the adhesive strip 202, so that the adhesive strip 202 can be inserted into the slot 204. After the outer cylinder 203 contacts the adhesive strip 202, the outer cylinder 203 stops rotating synchronously with the inner cylinder 101, so that the adhesive strip 202 can be pressed into the spiral groove 201. This is the technical effect.
[0033] Specifically, the outer wall of the slider 305 is provided with a cleaning component for cleaning the spiral groove 201. The cleaning component includes a connecting ring 306 and a sealing component. The connecting ring 306 is coaxially fixedly connected to the outer wall of the slider 305 and threadedly connected to the inner wall of the inner screw cylinder 309. The inner screw cylinder 309 is coaxially disposed inside the inner cylinder 101, and both ends of the inner screw cylinder 309 are open and rotatably connected to both ends of the inner cylinder 101. The outer wall of the inner screw cylinder 309 is fixedly connected with a protrusion 401. The sealing assembly is used to intermittently flush the spiral groove 201 with water inside the inner cylinder 101.
[0034] Specifically, the sealing assembly includes an arc plate 403, which is used to seal the through hole on the spiral groove 201 that connects to the inner wall of the inner cylinder 101. The arc plate 403 is in close contact with the inner wall of the inner cylinder 101, and the two ends of the arc plate 403 are fixedly connected to the corresponding frame 402. The frame 402 is fixedly connected to the outer wall of the inner spiral cylinder 309.
[0035] In the above embodiment, when the slider 305 begins linear motion, it can drive the connecting ring 306, which is fixedly connected to it, to start rotating synchronously. Since the inner screw cylinder 309 does not have a self-locking effect, when the connecting ring 306 slides inside the inner screw cylinder 309, it can drive the inner screw cylinder 309 to start rotating. That is, at this time, during the rotation of the inner cylinder 101, the inner screw cylinder 309, which is rotated inside it, begins to rotate, thereby creating a speed difference between the inner screw cylinder 309 and the inner cylinder 101. This allows for sufficient disturbance of the clear water between them, causing the clear water to form complex eddies and turbulence, and causing the water to flow through the inner cylinder 101. A stronger circulation and tumbling effect is generated between the spiral groove 201 and the inner cylinder 309, which effectively flushes the rubber strip 202 through the through holes in the spiral groove 201 (and the user should start injecting water between the inner spiral groove 309 and the inner cylinder 101 through the water injection hole on the side of the inner cylinder 101 after cleaning the mud and sand on the lower guard plate 102). During the rotation of the inner spiral groove 309, it drives the multiple relatively fixed arc plates 403 to rotate synchronously, thereby periodically closing the through holes in the spiral groove 201, effectively controlling the outflow of water from the inner cylinder 101.
[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0037] The term "fixed connection" as used in this application refers to a connection in which parts or components are fixed without any relative movement. This includes both detachable and non-detachable connections.
[0038] (1) Detachable connection: Components are fixed together using screws, splines, wedges, etc. This type of connection allows for disassembly during maintenance without damaging the parts. However, the specifications of the connectors used must be correct. (Such as the length of bolts, keys, and wedges), and tighten them properly.
[0039] (2) Non-removable connections: These mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxy-acetylene cutting for repair or replacement, these parts generally cannot be reused. Furthermore, during connection, [the following should be noted]: Pay attention to process quality, technical testing, and remedial measures (such as correction, polishing, etc.).
[0040] The sliding connection referred to in this application means that the component can slide along a linear trajectory, and the hinge referred to in this application means that the component can rotate along an axial constraint.
[0041] In some cases, the sliding connection and hinge referred to in this application may also be damped, enabling the component to maintain in the desired position.
[0042] 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 structure for preventing mud and sand adhesion on the surface of a high-strength, water-resistant protective plate, characterized in that, The device includes an inner cylinder (101) and a connecting assembly. The outer wall of the inner cylinder (101) is symmetrically provided with multiple spiral grooves (201), with each spiral groove (201) located at one end of the inner cylinder (101). A rubber strip (202) of equal length is provided within each spiral groove (201), and the left end of the rubber strip (202) is fixedly connected to the spiral groove (201). An outer cylinder (203) is coaxially arranged on the side of the inner cylinder (101), with one end of the outer cylinder (203) near the inner cylinder (101) being open. The outer cylinder (203) is provided with a plurality of slots (204) fixedly and symmetrically arranged at the open end, and the positions of the plurality of slots (204) correspond to the positions of the plurality of spiral grooves (201). The inner wall of the outer cylinder (203) is fixedly connected with a plug (205) corresponding to the slots (204). The length and width of the plug (205) are equal, and the plug (205) can be inserted into the spiral groove (201) corresponding to it. The plug (205) is used to press the rubber strip (202) into the spiral groove (201). The connecting assembly is used to stop the outer cylinder (203) and the inner cylinder (101) from rotating synchronously.
2. The anti-mud and sand adhesion structure on the surface of the high water-resistant protective plate according to claim 1, characterized in that, The outer cylinder (203) is rotatably mounted on the sliding mounting base (206) at one end away from the inner cylinder (101), and a damper is provided at the connection between the outer cylinder (203) and the sliding mounting base (206). The sliding mounting base (206) is slidably mounted on the lower guard plate (102). The inner cylinder (101) is fixedly connected to the output shaft of the motor (208) at one end away from the outer cylinder (203), and the motor (208) is coaxially fixedly connected to the fixed mounting base (207). The fixed mounting base (207) is fixedly mounted on the lower guard plate (102).
3. The high water-resistant strength lining surface anti-mud and sand adhesion structure according to claim 1, characterized in that, The connecting assembly includes a cylindrical body (301) and a guide assembly. The cylindrical body (301) is fixedly connected inside the inner cylinder (101), and an inner liner (302) is coaxially arranged inside the cylindrical body (301). A plurality of sliding grooves (303) are symmetrically arranged on the outer wall of the inner liner (302), and a plurality of sliding rods (304) are symmetrically arranged on the inner wall of the cylindrical body (301). The sliding rods (304) are slidably arranged in the sliding grooves (303). The guide assembly is used to detach the inner liner (302) from the cylinder (301).
4. The anti-mud and sand adhesion structure on the surface of the high water-resistant protective plate according to claim 3, characterized in that, The inner liner (302) is coaxially fixedly connected to a guide rod (209) at one end near the inner cylinder (101), and the diameter of the guide rod (209) is smaller than the diameter of the inner liner (302). The guide rod (209) passes through a through hole on the surface of the inner cylinder (101), and the other end of the guide rod (209) is fixedly connected to the inner wall of the outer cylinder (203).
5. The anti-mud and sand adhesion structure on the surface of the high water-resistant protective plate according to claim 3, characterized in that, The guide assembly includes a slider (305), the end of the inner liner (302) located outside the cylinder (301) is rotatably disposed at the axis of the slider (305), and the slider (305) is threadedly connected to the lead screw (308). The slider (305) is slidably disposed on the limiting rod (307).
6. The anti-mud and sand adhesion structure on the surface of the high water-resistant protective plate according to claim 5, characterized in that, One end of the lead screw (308) is rotatably connected to the inner cylinder (101), the other end of the lead screw (308) is fixedly connected to the output shaft of the motor, and the motor is fixedly connected to the inner cylinder (101). The limiting rod (307) is fixedly connected to the inner cylinder (101).
7. The high water-resistant strength lining surface anti-mud and sand adhesion structure according to claim 5, characterized in that, The outer wall of the slider (305) is provided with a cleaning component for cleaning the spiral groove (201). The cleaning component includes a connecting ring (306) and a sealing component. The connecting ring (306) is coaxially fixedly connected to the outer wall of the slider (305), and the connecting ring (306) is threadedly connected to the inner wall of the inner screw cylinder (309). The inner screw cylinder (309) is coaxially arranged inside the inner cylinder (101), and both ends of the inner screw cylinder (309) are open and rotatably connected to both ends of the inner cylinder (101). The outer wall of the inner screw cylinder (309) is fixedly connected with a protrusion (401). The sealing assembly is used to intermittently flush the spiral groove (201) with water inside the inner cylinder (101).
8. The anti-mud and sand adhesion structure on the surface of the high water-resistant protective plate according to claim 7, characterized in that, The sealing assembly includes an arc plate (403) for sealing the through hole on the spiral groove (201) that connects to the inner wall of the inner cylinder (101). The arc plate (403) is in close contact with the inner wall of the inner cylinder (101). The two ends of the arc plate (403) are fixedly connected to the corresponding frame (402), and the frame (402) is fixedly connected to the outer wall of the inner spiral cylinder (309).
9. A high-strength water-resistant lower guard plate, characterized in that, Includes any of the surface mud and sand anti-adhesion structures described in claims 1-8 above.