Automobile bottom guard plate bolt with anti-loosening performance

Abstract

The invention discloses an automobile bottom guard plate bolt with anti-loosening performance, which belongs to the technical field of anti-loosening of bottom guard plates, solves the problems of poor anti-loosening performance, loose connection and poor sealing performance in the prior art, and comprises a bolt and a bottom guard plate tightly connected with the bolt, a fastening assembly for preventing the connection between the screw head and the bottom protection plate from loosening is embedded in the surface of the bottom protection plate, and a sealing assembly for sealing a gap between the stud and the bottom protection plate is further arranged on the surface of the waist part of the stud. The fastening assembly is arranged on the bottom protection plate, the screw head is limited, rotation of the bolt is prevented, and therefore the problem that the bolt is loosened due to vibration of a vehicle is solved, the sealing assembly is arranged at the joint of the bolt and the bottom protection plate, the joint is filled with the sealing air bag, external impurities are reduced, and meanwhile the sealing effect is improved. And the bolt and the bottom guard plate are connected into a whole, so that the connection tightness is further enhanced.

Description

Technical Field

[0001] This invention belongs to the field of bottom guard plate anti-loosening technology, and more specifically, it relates to an automotive bottom guard plate bolt with anti-loosening properties. Background Technology

[0002] Chassis underbody protection plates are functional components widely used in automotive chassis. By covering a large area of ​​the chassis metal and pipelines, they protect the pipelines, reduce wind resistance, reduce noise from stone impacts, and minimize the risk of metal corrosion. They are generally made of special engineering plastics through injection molding or compression molding. Currently, most vehicles on the market use bolts to fasten the underbody protection plates to the chassis with welded nuts. While this generally meets reliability requirements for the central fixed area, the reliability of underbody protection plates for the front and rear axles and subframe areas is less than ideal. Under conditions of high vibration, the bolts can easily loosen and fall off during long-term driving, causing the underbody protection plate to fall off and creating a hazard. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an automotive underbody protection plate bolt with strong anti-loosening properties, tight connection, and excellent sealing performance.

[0004] To achieve the above technical objectives, the technical solution adopted by the automotive underbody protection plate bolt with anti-loosening properties in this invention is as follows: A car underbody protection plate bolt with anti-loosening properties includes a bolt and an underbody protection plate tightly connected to the bolt. The bolt includes a bolt head and a stud. A fastening assembly is embedded on the surface of the underbody protection plate to prevent the bolt head from loosening. The fastening assembly includes positioning seats distributed front and back on the surface of the underbody protection plate. A sliding groove is formed on the surface of the positioning seat. A slider is slidably connected in the sliding groove. The slider has an inclined insertion port on its waist and a top post on its inner end. An active block is inserted into the insertion port. The bottom of the active block is slidably connected to the surface of the active seat. The active seat is located on the central axis between the two positioning seats. A main top post is located on the inner end of the active block. A drive rod is inserted into the insertion port on both sides of the main top post. The drive rod is located at both ends of the inner end of the active block. A miniature cylinder is provided on the outer end of the active block to drive it to slide along the surface of the underbody protection plate. A positioning post is provided on the opposite side of the main top post. The positioning post is fixed to the inner end of the fixing seat. The fixing seat is fixed to the surface of the underbody protection plate. The stud waist surface is also provided with a sealing assembly to seal the gap between the stud and the bottom guard plate. The sealing assembly includes a compression airbag, a compression plate, and a sealing airbag. The compression airbag is sleeved on the stud surface. The lower part of the compression airbag is provided with a compression plate that is slidably connected to the stud surface. The compression plate is used to compress the compression airbag. The inner surface of the compression airbag is provided with a connecting tube. The other end of the connecting tube passes through the compression plate and is connected to the sealing airbag. The lower surface of the stud is provided with a ring seat. The sealing airbag is provided inside the ring seat. The expanded end of the sealing airbag faces the bottom guard plate. A connecting rod is also provided inside the ring seat. One end of the connecting rod is connected to the compression plate, and the other end is located inside the ring seat.

[0005] Preferably, the active seat is disposed on the surface of the bottom protective plate and is evenly distributed on the surface of the bottom protective plate along with the two positioning seats and the fixed seat.

[0006] Preferably, a mounting base is wound around the surface of the stud, and a compression airbag is fixedly connected to the inner side of the mounting base.

[0007] Preferably, the compression airbag is also provided with a gas replenishment port, which can be connected to an external inflation device.

[0008] Preferably, the bottom protective plate has a sealing groove on its surface to accommodate the sealing airbag.

[0009] Compared with the prior art, the beneficial effects of the present invention are: This invention solves the problem of bolt loosening caused by vehicle vibration by setting a fastening component on the underbody protection plate to limit the bolt head and prevent the bolt from rotating. A sealing component is set at the connection between the bolt and the underbody protection plate, and a sealing airbag is filled into the connection to reduce the entry of external impurities and make the bolt and the underbody protection plate connected as a whole, further enhancing the tightness of the connection. This solves the problem that bolts are prone to loosening and falling off during long-term driving under conditions of large vibration, causing the underbody protection plate to fall off. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the bolt structure in this invention; Figure 3 This is a cross-sectional view of the sealing component in this invention.

[0011] In the diagram: 1. Bottom guard plate; 2. Screw head; 3. Stud; 4. Positioning seat; 5. Slide groove; 6. Slider; 7. Top column; 8. Driving block; 9. Driving seat; 10. Main top column; 11. Drive rod; 12. Miniature cylinder; 13. Positioning column; 14. Fixed seat; 15. Compression airbag; 16. Compression plate; 17. Sealing airbag; 18. Connecting pipe; 19. Ring seat; 20. Connecting rod; 21. Mounting seat. Detailed Implementation

[0012] The invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figure 1-3 As shown, a car underbody protection plate bolt with anti-loosening properties includes a bolt and an underbody protection plate 1 tightly connected to the bolt. The bolt includes a screw head 2 and a stud 3. A fastening assembly to prevent the screw head 2 from loosening is embedded on the surface of the underbody protection plate 1. The fastening assembly includes positioning seats 4 distributed front and back on the surface of the underbody protection plate 1. The surface of the positioning seat 4 has a sliding groove 5. A slider 6 is slidably connected in the sliding groove 5. The slider 6 has an inclined insertion port on its waist and a top post 7 on its inner end. An active block 8 is inserted into the insertion port. The bottom of the active block 8 is slidably connected to the surface of the active seat 9. The active seat 9 is provided with... On the central axis between the two positioning seats 4, the inner end of the active block 8 is provided with a main top column 10, and the two sides of the main top column 10 are provided with drive rods 11 that are inserted into the insertion port. The drive rods 11 are located at both ends of the inner end of the active block 8. The outer end of the active block 8 is provided with a miniature cylinder 12 that drives it to slide along the surface of the bottom guard plate 1. The opposite side of the main top column 10 is provided with a positioning column 13. The positioning column 13 is fixed to the inner end of the fixed seat 14. The fixed seat 14 is fixed to the surface of the bottom guard plate 1. The active seat 9 is located on the surface of the bottom guard plate 1 and is evenly distributed on the surface of the bottom guard plate 1 along with the two positioning seats 4 and the fixed seat 14. The waist surface of the stud 3 is also provided with a sealing assembly for sealing the gap between the stud 3 and the bottom guard plate 1. The sealing assembly includes a compression airbag 15, a compression plate 16, and a sealing airbag 17. The compression airbag 15 is sleeved on the surface of the stud 3. The lower part of the compression airbag 15 is provided with a compression plate 16 that is slidably connected to the surface of the stud 3. The compression plate 16 is used to compress the compression airbag 15. The inner surface of the compression airbag 15 is provided with a connecting tube 18. The other end of the connecting tube 18 passes through the compression plate 16 and is connected to the sealing airbag 17. The lower surface of the stud 3 is provided with a ring seat 19. The sealing airbag 17 is provided inside the ring seat 19. The expanded end of the sealing airbag 17 faces the bottom guard plate 1. The ring seat 19 is also provided with a connecting rod 20. One end of the connecting rod 20 is connected to the compression plate 16, and the other end is located inside the ring seat 19.

[0013] When the present invention is in operation, after the stud 3 is inserted into the bottom guard plate 1 and connected to the chassis, it will squeeze the connecting rod 20. The connecting rod 20 drives the squeezing plate 16 to move. The squeezing plate 16 squeezes the squeezing airbag 15. The gas in the squeezing airbag 15 enters the sealing airbag 17 through the connecting pipe 18. The sealing airbag 17 expands and embeds into the connection between the bottom guard plate 1 and the stud 3, thereby enhancing the sealing effect and preventing water vapor, dust and other impurities from entering the interior from the gap at the connection, which would cause wear on the stud 3 and damage the tight connection. At the same time, the micro cylinder 12 is activated, which pushes the active seat 9 to move towards the positioning seat 4. The drive rod 11 simultaneously drives the slider 6 to slide along the slide groove 5 until the top column 7, the main top column 10 and the positioning column 13 tightly fix the screw head 2 and cannot move it, thus ensuring the tightness of the connection between the bolt and the bottom guard plate.

[0014] In this invention, a mounting base 21 is wound around the surface of the stud 3, and a compression air bladder 15 is fixedly connected to the inner side of the mounting base 21. The compression air bladder 15 is also provided with a gas replenishment port, which can be connected to an external inflation device. With repeated use of the device, the gas in the compression air bladder 15 and the sealing air bladder 17 may leak slightly due to various reasons, affecting the sealing effect. At this time, the compression air bladder 15 is provided with a dedicated gas replenishment port. Purified air can be slowly filled into the compression air bladder 15 through the gas replenishment port using a matching inflation device. As the gas is injected, the compression air bladder 15 gradually inflates and the pressure increases. When the specified pressure value is reached, inflation stops. During the next connection process of the bolt, bottom guard plate 1, and chassis, the compression air bladder 15 can smoothly deliver the gas to the sealing air bladder 17 with sufficient gas volume, maintaining good sealing performance.

[0015] In this invention, the bottom protective plate 1 has a sealing groove on its surface to accommodate the sealing airbag 17. Through the cooperation of the sealing airbag 17 and the sealing groove, the gap at the connection between the bolt and the bottom protective plate 1 is effectively sealed, preventing the intrusion of external impurities.

[0016] In summary, these are merely preferred embodiments of the present invention and are not intended to limit the scope of the invention. All equivalent variations and modifications made in accordance with the shape, structure, features, and spirit of the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A car underbody protection plate bolt with anti-loosening properties, comprising a bolt and an underbody protection plate tightly connected to the bolt, wherein the bolt comprises a bolt head and a stud, characterized in that: The bottom protective plate surface is embedded with a fastening assembly to prevent the screw head from loosening its connection with the bottom protective plate. The fastening assembly includes positioning seats distributed front and back on the bottom protective plate surface. The positioning seats have a sliding groove on their surface, and a slider is slidably connected in the sliding groove. The slider has an inclined insertion port at its waist and a top post at its inner end. An active block is inserted into the insertion port. The bottom of the active block is slidably connected to the surface of the active seat. The active seat is located on the central axis between the two positioning seats. The active block has a main top post at its inner end. The main top post has drive rods on both sides that are inserted into the insertion port. The drive rods are located at both ends of the active block's inner end. The active block has a miniature cylinder at its outer end that drives it to slide along the bottom protective plate surface. A positioning post is located on the opposite side of the main top post. The positioning post is fixed to the inner end of the fixing seat. The fixing seat is fixed to the bottom protective plate surface. The stud waist surface is also provided with a sealing assembly to seal the gap between the stud and the bottom guard plate. The sealing assembly includes a compression airbag, a compression plate, and a sealing airbag. The compression airbag is sleeved on the stud surface. The lower part of the compression airbag is provided with a compression plate that is slidably connected to the stud surface. The compression plate is used to compress the compression airbag. The inner surface of the compression airbag is provided with a connecting tube. The other end of the connecting tube passes through the compression plate and is connected to the sealing airbag. The lower surface of the stud is provided with a ring seat. The sealing airbag is provided inside the ring seat. The expanded end of the sealing airbag faces the bottom guard plate. A connecting rod is also provided inside the ring seat. One end of the connecting rod is connected to the compression plate, and the other end is located inside the ring seat.

2. The automotive underbody protection plate bolt with anti-loosening properties according to claim 1, characterized in that: The active seat is located on the surface of the bottom guard plate and is evenly distributed on the surface of the bottom guard plate along with the two positioning seats and the fixed seat.

3. The automotive underbody protection plate bolt with anti-loosening properties according to claim 1, characterized in that: A mounting base is wound around the surface of the stud, and a compression airbag is fixedly connected to the inner side of the mounting base.

4. The automotive underbody protection plate bolt with anti-loosening properties according to claim 3, characterized in that: The compression airbag is also equipped with a gas replenishment port, which can be connected to an external inflation device.

5. The automotive underbody protection plate bolt with anti-loosening properties according to claim 1, characterized in that: The bottom protective plate has a sealing groove on its surface to accommodate the sealing airbag.

Images