Water-repellent engine heat insulation bottom protection plate
By designing protective and sealing components on the engine heat shield, the problems of mud and water ingress and corrosion were solved, achieving better protection and heat dissipation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN YIREN AUTOMOTIVE INTERIOR PARTS CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-05
AI Technical Summary
Existing engine heat shields are prone to mud and water entering the gaps under conditions of mud, water, or uneven road surfaces, leading to internal corrosion and reduced protective effect.
A water-repellent engine heat insulation underbody plate was designed, which includes a protective component and a sealing component. The protective component is fixed by a cover plate and a positioning bolt, and the sealing component improves the sealing performance by using a rubber ring and a sealing strip. It is combined with heat dissipation grooves and grille grooves to enhance protection and heat dissipation.
It effectively prevents mud and water from entering, reduces bolt corrosion, improves maintenance convenience and heat dissipation, and enhances overall protection performance.
Smart Images

Figure CN224197708U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts, specifically a water-repellent engine heat insulation underbody plate. Background Technology
[0002] Water-repellent engines are widely used in automobiles and can effectively prevent water from entering the engine. In order to protect the engine from external damage, a bottom guard plate needs to be installed at the bottom of the vehicle engine to prevent foreign objects from entering.
[0003] The announcement number CN212890188U provides an engine heat shield, which includes a shield, a square frame and bolts. The bottom surface of the shield is in contact with the upper surface of the square frame, and a rubber pad is fixed in the middle of the square frame.
[0004] The aforementioned skid plate effectively reduces damage from gravel on the ground. However, when vehicles drive over muddy or uneven surfaces, mud and water can easily seep into the skid plate body through gaps, reducing overall protection. Furthermore, gaps exist at the joints, and the skid plate body does not fit tightly against the vehicle frame, making it easy for mud and water to cause corrosion at the bolt joints. Utility Model Content
[0005] The purpose of this utility model is to provide a water-repellent engine heat insulation underbody plate to solve the technical problems in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A water-repellent engine heat insulation underbody plate includes a plate body, a protective component installed on the top of the plate body, a sealing component installed on the outer ring of the plate body, an inspection groove and a limiting groove in the middle of the plate body, a cover plate installed in the limiting groove, three positioning bolts connected to both sides of the top of the cover plate, a plurality of heat dissipation grooves opened through the top of the cover plate, a protective cover installed on the top of each heat dissipation groove, a protective plate fixedly installed on the top of the cover plate, a set of grid grooves opened on both sides and the rear of the protective plate, a plurality of guide grooves provided on the top of the protective plate, and a through groove opened at the front of the protective plate.
[0008] Preferably, the cover plates are positioned within the limiting groove and are matched to each other, and the bottom end of the positioning bolt is connected to the body of the guard plate by a thread.
[0009] Preferably, the opening of the protective cover faces the front end, and the protective plate and the cover plate are fixed to each other.
[0010] Preferably, the rear surface of the protective plate is inclined, and a plurality of guide grooves are arranged at equal intervals.
[0011] Preferably, the sealing assembly includes a connecting plate and a sealing strip. The connecting plate is fixedly installed on the outer ring of the protective plate body, the sealing strip is adhered to the bottom of the connecting plate, a plurality of rubber rings are fixedly installed on the bottom of the connecting plate, a plurality of fixing sleeves are fixedly installed on the top of the connecting plate, and a sealing cap is connected to the inside of the fixing sleeve near the top.
[0012] Preferably, the rubber ring and the fixing sleeve correspond to each other, and the fixing sleeve passes through the connecting plate and communicates with the rubber ring.
[0013] Preferably, the inner wall of the fixing sleeve is provided with threads, and the sealing cap is located inside the fixing sleeve and is connected by threads.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1) The bottom guard plate, by setting protective components, the cover plate is fixed in the limiting groove. The removal and installation of the cover plate facilitates quick internal inspection and observation. The heat dissipation groove and protective cover reduce the entry of mud and water into the interior, while improving the internal heat dissipation effect. The protective plate and grid groove further improve the protection of the cover plate and the guard plate body.
[0016] 2) This underbody protection plate, by setting a sealing component, the bolts pass through the connecting plate and rubber ring to connect to the frame. The sealing strip and rubber ring improve the sealing inside the plate body, reducing the entry of mud and water from the gaps at the connection. The connection between the sealing cover and the fixing sleeve seals the bolts inside, reducing the corrosion of the bolts by mud and water. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a water-repellent engine heat insulation underbody plate according to an embodiment of the present invention;
[0018] Figure 2 This is a schematic diagram of the disassembled structure of the protective component in an embodiment of the present utility model;
[0019] Figure 3 This is a schematic diagram of the bottom structure of the sealing assembly in an embodiment of the present utility model;
[0020] Figure 4 This is a schematic diagram of the internal structure of the fixing sleeve in an embodiment of this utility model.
[0021] In the diagram: 1. Protective plate body; 2. Protective component; 3. Sealing component; 4. Inspection groove; 5. Limiting groove; 6. Cover plate; 7. Positioning bolt; 8. Heat dissipation groove; 9. Protective cover; 10. Protective plate; 11. Grille groove; 12. Guide groove; 13. Through groove; 14. Connecting plate; 15. Sealing strip; 16. Rubber ring; 17. Fixing sleeve; 18. Sealing cover. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Example 1
[0024] Combination Figures 1-4 A water-repellent engine heat insulation underbody plate includes a plate body 1, a protective component 2 installed on the top of the plate body 1, and a sealing component 3 installed on the outer ring of the plate body 1.
[0025] See Figure 2 Furthermore, the protective plate body 1 has an inspection groove 4 and a limiting groove 5 in the middle. The protective component 2 includes a cover plate 6, which is installed in the limiting groove 5. Three positioning bolts 7 are connected to the top of the cover plate 6 on both sides. Several heat dissipation grooves 8 are opened through the top of the cover plate 6. A protective cover 9 is installed on the top of each heat dissipation groove 8. A protective plate 10 is fixedly installed on the top of the cover plate 6. A set of grid grooves 11 are opened on both sides and the rear of the protective plate 10. Several guide grooves 12 are provided on the top of the protective plate 10. A through groove 13 is opened at the front of the protective plate 10.
[0026] The cover plate 6 is located in the limiting groove 5 and is matched with each other. The bottom end of the positioning bolt 7 is connected to the guard plate body 1 by a thread. The cover plate 6 is used to cover the inspection groove 4 and is fixed by the positioning bolt 7.
[0027] The opening of the protective cover 9 faces the front end, and the protective plate 10 and the cover plate 6 are fixed to each other. The protective cover 9 is used to prevent mud and water from entering and to dissipate heat through the opening at the front end.
[0028] The rear surface of the protective plate 10 is inclined, and several guide channels 12 are arranged at equal intervals. The protective plate 10 is used to enhance the protection of the cover plate 6 and reduce the contact area with uneven road surfaces through the guide channels 12.
[0029] Specifically, the airflow enters the protective plate 10 through the rear grille 11, and the protective cover 9 prevents mud and water from entering the heat dissipation trough 8. The protective plate 10 improves the protection of the cover plate 6 and reduces the scratches from sand and gravel. The cover plate 6 can be disassembled and installed to facilitate internal observation and maintenance.
[0030] Example 2
[0031] See Figure 3 and Figure 4Furthermore, based on Embodiment 1, the sealing assembly 3 includes a connecting plate 14 and a sealing strip 15. The connecting plate 14 is fixedly installed on the outer ring of the protective plate body 1, the sealing strip 15 is bonded to the bottom of the connecting plate 14, a number of rubber rings 16 are fixedly installed on the bottom of the connecting plate 14, and a number of fixing sleeves 17 are fixedly installed on the top of the connecting plate 14. A sealing cover 18 is connected to the inside of the fixing sleeve 17 near the top.
[0032] The rubber ring 16 and the fixing sleeve 17 correspond to each other. The fixing sleeve 17 passes through the connecting plate 14 and communicates with the rubber ring 16. The rubber ring 16 contacts the frame, and the bolt passes through the rubber ring 16 to connect and fix it to the frame.
[0033] The inner wall of the fixed sleeve 17 is provided with threads, and the sealing cover 18 is located inside the fixed sleeve 17 and is threadedly connected. The sealing cover 18 is connected inside the fixed sleeve 17 to seal the bolt inside the fixed sleeve 17.
[0034] Specifically, bolts pass through the connecting plate 14 and rubber ring 16 to connect and fix the frame, the sealing strip 15 presses the frame tight, improving the seal between the guard plate body 1 and the frame, and the bolts are sealed in the fixing sleeve 17 by the sealing cover 18 to reduce the corrosion of mud and water.
[0035] In actual operation, the guard plate body 1 is flipped over and fixed to the bottom of the frame, that is, the bottom of the guard plate body 1 is fixed to the bottom of the frame. The cover plate 6 is fixed in the limiting groove 5 to provide protection. The guard plate body 1 provides heat insulation and protection for the engine.
[0036] When protection is applied, the cover plate 6 is fixed in the limiting groove 5 by the positioning bolt 7, covering the inspection groove 4. When passing through muddy roads, the airflow enters the protective plate 10 through the rear grille groove 11. The protective cover 9 prevents mud and water from entering the heat dissipation groove 8. The opening at the front of the protective cover 9 is used to dissipate the heat of the engine. When passing through uneven roads, the sand and gravel come into contact with the guide groove 12. The protective plate 10 improves the protection of the cover plate 6 and reduces the scratches of the sand and gravel. The mud and water that enters through the grille groove 11 are discharged through the channel 13 under the action of airflow. By removing the cover plate 6, it is convenient for internal observation and maintenance, reducing the operation of overall disassembly.
[0037] During connection and sealing, the guard plate body 1 is installed at the bottom of the frame. Bolts pass through the connecting plate 14 and the rubber ring 16 to connect and fix it to the frame. The rubber ring 16 contacts the frame and adapts to contraction, so that the sealing strip 15 presses the frame tightly, thereby sealing the bottom of the guard plate body 1 with the frame and reducing the entry of mud and water from the connection. By connecting the sealing cover 18 to the fixing sleeve 17, the bolts are sealed in the fixing sleeve 17, reducing the corrosion of mud and water.
[0038] Although embodiments of the present 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 the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A water-repellent engine heat insulation underbody plate, comprising a plate body (1), characterized in that: The top of the protective plate body (1) is equipped with a protective component (2), and the outer ring of the protective plate body (1) is equipped with a sealing component (3). The protective plate body (1) has an inspection groove (4) and a limiting groove (5) in the middle. The protective component (2) includes a cover plate (6). The cover plate (6) is installed in the limiting groove (5). Three positioning bolts (7) are connected to the top of the cover plate (6) on both sides. Several heat dissipation grooves (8) are opened through the top of the cover plate (6). A protective cover (9) is installed on the top of each heat dissipation groove (8). A protective plate (10) is fixedly installed on the top of the cover plate (6). A set of grid grooves (11) are opened on both sides and the rear of the protective plate (10). Several guide grooves (12) are provided on the top of the protective plate (10). A through groove (13) is opened at the front of the protective plate (10).
2. The water-repellent engine heat insulation underbody plate according to claim 1, characterized in that: The cover plate (6) is located in the limiting groove (5) and is matched with each other. The bottom end of the positioning bolt (7) is connected to the guard plate body (1) by a thread.
3. The water-repellent engine heat insulation underbody plate according to claim 1, characterized in that: The opening of the protective cover (9) faces the front end, and the protective plate (10) and the cover plate (6) are fixed to each other.
4. The water-repellent engine heat insulation underbody plate according to claim 1, characterized in that: The rear surface of the protective plate (10) is inclined, and several guide grooves (12) are arranged at equal intervals.
5. A water-repellent engine heat insulation underbody plate according to claim 1, characterized in that: The sealing assembly (3) includes a connecting plate (14) and a sealing strip (15). The connecting plate (14) is fixedly installed on the outer ring of the protective plate body (1). The sealing strip (15) is bonded to the bottom of the connecting plate (14). Several rubber rings (16) are fixedly installed on the bottom of the connecting plate (14). Several fixing sleeves (17) are fixedly installed on the top of the connecting plate (14). A sealing cap (18) is connected to the inside of the fixing sleeve (17) near the top.
6. A water-repellent engine heat insulation underbody plate according to claim 5, characterized in that: The rubber ring (16) and the fixing sleeve (17) correspond to each other, and the fixing sleeve (17) passes through the connecting plate (14) and communicates with the rubber ring (16).
7. A water-repellent engine heat insulation underbody plate according to claim 5, characterized in that: The inner wall of the fixed sleeve (17) is provided with threads, and the sealing cap (18) is located inside the fixed sleeve (17) and is connected by threads.
Citation Information
Patent Citations
Engine heat insulation guard board
CN212890188U