Automobile heat shield with mounting structure

Abstract

The utility model relates to the technical field of automobile heat shield, provide a kind of automobile heat shield with mounting structure, including upper heat shield and lower heat shield, the first flange and second flange are integrally extended in upper heat shield and lower heat shield two sides respectively, the first flange lower end is fixedly connected with the plug block that is arranged in rectangular matrix, the second flange is penetrated and is set with the insertion slot that is arranged in rectangular matrix, the plug block is inserted in insertion slot;The plug block is penetrated and is set with pin hole, the beneficial effects of the utility model are that: after realizing preliminary positioning by plug block insertion insertion slot, the continuous extrusion of the wedge-shaped end of insertion pin to the inner wall of pin hole is utilized, the mechanical fastening effect similar to bolt thread is formed, the stable rigid connection of upper heat shield and lower heat shield is provided, replaces the single limiting function of spring buckle. At the same time, the cooperation of reset spring and limiting block ensures that the tight engagement state of insertion pin and pin hole does not decay with time.

Description

Technical Field

[0001] This utility model relates to the field of automotive heat shield technology, specifically an automotive heat shield with an installation structure. Background Technology

[0002] The upper and lower heat shields of automotive heat shields are often connected by bolts, utilizing the axial preload generated by the threaded engagement of the heat shields to ensure a tight fit. With the need to simplify assembly processes, snap-fit ​​structures are gradually replacing bolts. Spring-loaded pin snap-fits use a spring and pin engaging with holes for quick positioning, reducing assembly steps and improving disassembly and assembly efficiency.

[0003] However, during long-term use, spring clips primarily rely on the elastic force of the spring for limiting their position. Their structure lacks a rigid fastening mechanism similar to threads, providing only limited clamping force through elastic deformation. The engagement of the pin and hole in the latch clip is also primarily for simple positioning, making it difficult to generate a continuous rigid locking force. Therefore, gaps often form between the upper and lower heat insulation covers, allowing heat to dissipate and affecting the insulation effect. Utility Model Content

[0004] The purpose of this invention is to provide an automotive heat shield with an installation structure. After initial positioning by inserting a plug into a slot, the wedge-shaped end of the pin continuously compresses the inner wall of the pin hole, forming a mechanical fastening effect similar to bolt threads. This provides a stable and rigid connection between the upper and lower heat shields, replacing the single limiting function of spring clips. Simultaneously, the cooperation between the return spring and the limiting block ensures that the tight engagement between the pin and the pin hole does not weaken over time, effectively eliminating gaps between the upper and lower heat shields caused by insufficient fastening force of the elastic clips, thus improving the heat insulation effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a car heat shield with an installation structure, comprising an upper heat shield and a lower heat shield, wherein the upper heat shield and the lower heat shield are integrally extended with a first convex edge and a second convex edge on their respective sides, the lower end of the first convex edge is fixedly connected with a plug block arranged in a rectangular array, and the second convex edge is provided with a slot arranged in a rectangular array, wherein the plug block is inserted into the slot.

[0006] The insert has a through-hole with a wedge-shaped cross-section, and a snap-fit ​​component is provided at the lower end of the second protruding edge.

[0007] The snap-fit ​​assembly includes a first guide groove formed at the lower end of the second protruding edge, a first guide block slidably connected in the first guide groove, a transmission block fixedly connected at the lower end of the first guide block, a groove formed at the upper end of the transmission block, a return spring fixedly connected to the bottom wall of the groove, a limit block fixedly connected to the upper end of the return spring, and second guide grooves formed on both sides of the transmission block at an incline, a second guide block slidably connected in the second guide groove, and a pin fixedly connected to one side of the second guide block.

[0008] Preferably, the second protruding edge is fixedly connected to a limiting sleeve corresponding to the pin, the pin passes through the limiting sleeve, and the pin and the limiting sleeve are slidably connected. The limiting sleeve and the pin form a sliding fit, providing axial guidance for the pin and limiting the pin's displacement in the horizontal direction.

[0009] Preferably, the end of the pin furthest from the second guide block is a wedge-shaped structure, and the width of the outer end face of the wedge-shaped structure is half the width of the outer hole of the pin hole, and the inclination angle of the wedge-shaped end face matches the wedge-shaped cross-sectional angle of the pin hole. The wedge-shaped structure decomposes force through the inclined surface. When the pin is inserted, the axial thrust is converted into a radial component force, which then squeezes the insert block through the component force.

[0010] Preferably, the first guide groove has a T-shaped cross-section, and the second guide groove has an inclined T-shaped cross-section. The T-shaped guide groove and the guide block form a concave-convex fit, restricting unnecessary displacement of the guide block.

[0011] Preferably, the initial length of the reset spring is two-thirds of the groove depth, the height of the limiting block is four-fifths of the groove depth, and when the reset spring is in its natural state, the top of the limiting block is higher than the upper surface of the second convex edge.

[0012] Preferably, the transmission block has an isosceles trapezoidal structure, and a recess is provided on the wide side of the transmission block. This recess forms a gripping part that is adapted to the application of force by the fingers, making it convenient to pull the transmission block 10 during use.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] After initial positioning by inserting the insert block into the slot, the wedge-shaped end of the pin continuously presses against the inner wall of the pin hole, forming a mechanical fastening effect similar to bolt threads. This provides a stable, rigid connection between the upper and lower heat insulation covers, replacing the single limiting function of the spring clip. Simultaneously, the cooperation between the return spring and the limiting block ensures that the tight engagement between the pin and the pin hole does not weaken over time, effectively eliminating gaps between the upper and lower heat insulation covers caused by insufficient fastening force of the elastic clip, thus improving the heat insulation effect. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a disassembly diagram of the upper and lower heat insulation covers in this utility model;

[0017] Figure 3 This is a disassembly diagram of the transmission block and pin structure in this utility model;

[0018] Figure 4 This is a cross-sectional view of the transmission block structure in this utility model;

[0019] Figure 5 This is a schematic diagram of the insert block structure in this utility model;

[0020] Figure 6 This is a schematic diagram of the pin and insert block structure in this utility model.

[0021] In the diagram: 1. Upper heat insulation cover; 2. Lower heat insulation cover; 3. First protruding edge; 4. Second protruding edge; 5. Insert block; 6. Slot; 7. Pin hole; 8. First guide groove; 9. First guide block; 10. Transmission block; 11. Groove; 12. Return spring; 13. Limiting block; 14. Second guide groove; 15. Second guide block; 16. Pin; 17. Limiting sleeve. 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] Please see Figure 1-6 The present invention provides the following technical solution:

[0024] A car heat shield with an installation structure includes an upper heat shield 1 and a lower heat shield 2. The upper heat shield 1 and the lower heat shield 2 have a first protruding edge 3 and a second protruding edge 4 extending integrally from their respective sides. The lower end of the first protruding edge 3 is fixedly connected to a plug block 5 arranged in a rectangular array. The second protruding edge 4 has a slot 6 arranged in a rectangular array through it, and the plug block 5 is inserted into the slot 6. The plug block 5 has a pin hole 7 through it, and the pin hole 7 has a wedge-shaped cross-section. The lower end of the second protruding edge 4 is provided with a snap-fit ​​assembly. The snap-fit ​​assembly includes a first guide groove 8 opened at the lower end of the second protruding edge 4. A first guide block 9 is slidably connected in the first guide groove 8. A transmission block 10 is fixedly connected to the lower end of the first guide block 9. A groove 11 is opened at the upper end of the transmission block 10. A return spring 12 is fixedly connected to the bottom wall of the groove 11. A limit block 13 is fixedly connected to the upper end of the return spring 12. The transmission block 10 has an inclined second guide groove 14 on both sides. A second guide block 15 is slidably connected in the second guide groove 14. A pin 16 is fixedly connected to one side of the second guide block 15.

[0025] The second protruding edge 4 is fixedly connected to the pin 16 and the limiting sleeve 17. The pin 16 passes through the limiting sleeve 17 and is slidably connected to the limiting sleeve 17. The end of the pin 16 away from the second guide block 15 is a wedge-shaped structure. The width of the outer end face of the wedge-shaped structure is half the width of the outer hole of the pin hole 7. The inclination angle of the wedge-shaped end face is adapted to the wedge-shaped section angle of the pin hole 7. The cross-section of the first guide groove 8 is T-shaped. The cross-section of the second guide groove 14 is an inclined T-shape. The initial length of the return spring 12 is two-thirds of the depth of the groove 11. The height of the limiting block 13 is four-fifths of the depth of the groove 11. When the return spring 12 is in its natural state, the top of the limiting block 13 is higher than the upper end face of the second protruding edge 4. The transmission block 10 is designed with an isosceles trapezoidal structure and has a recess on the wide side.

[0026] The working process of this utility model:

[0027] In use, in the initial state, the groove 11 at the top of the limiting block 13 and the limiting block 13 are restricted by the lower end face of the second protruding edge 4, the reset spring 12 is in a compressed state, and the pin 16 is not inserted into the pin hole 7.

[0028] During assembly, align the insert 5 of the first protruding edge 3 of the upper heat insulation cover 1 with the slot 6 on the second protruding edge 4 of the lower heat insulation cover 2, and push the upper heat insulation cover 1 to insert the insert 5 into the slot 6. After the insert 5 is fully inserted into the slot 6, pull the recess of the transmission block 10 with your finger. The transmission block 10 slides along the first guide groove 8 via the first guide block 9. While sliding, the transmission block 10 presses the second guide block 15 via the second guide groove 14. The pressed second guide block 15 then drives the pin 16 to move. The moving pin 16 then slides along the limiting sleeve 17. The sliding pin 16 then drives the wedge-shaped end to insert into the pin hole 7. As the transmission block 10 moves continuously, the pressed second guide block 15 drives the pin 16 to gradually insert into the pin hole 7. Since the cross-section of the pin hole 7 is wedge-shaped and matches the angle of the wedge-shaped end of the pin 16, the pin... As the wedge-shaped end of 16 penetrates deeper, it continuously presses against the inner wall of the pin hole 7, forcing the insert 5 to fit tightly against the inner wall of the slot 6, preventing gaps between them. At the same time, when the transmission block 10 slides to a certain position, the groove 11 and the limiting block 13 at the upper end of the transmission block 10 are no longer restricted by the second protruding edge 4. The return spring 12, which was originally in a compressed state, gradually extends, pushing the limiting block 13 to move upward until the top of the limiting block 13 is higher than the upper surface of the second protruding edge 4. At this time, the transmission block 10 is fixed in position under the resistance of the limiting block 13, while the insert 5 abuts against the pin 16 through the pin hole 7, further restricting the position of the pin 16. The pin 16, in turn, restricts the position of the transmission block 10 through the second guide block 15, ensuring the fixed position of the transmission block 10 and preventing the pin 16 from exiting the pin hole 7 under vibration or other working conditions. Through the rigid compression generated by the wedge-shaped fit between the pin 16 and the pin hole 7, the upper heat insulation cover 1 and the lower heat insulation cover 2 are connected by the plug 5, the slot 6 and the pin 16 to form a stable rigid connection. This avoids the loosening of the connection caused by the elastic fatigue of the traditional snap-fit ​​structure, ensuring that there is no gap between the two and guaranteeing the stability of the heat insulation effect.

[0029] 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 these 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 car heat shield with an installation structure, comprising an upper heat shield (1) and a lower heat shield (2), characterized in that: The upper heat shield (1) and the lower heat shield (2) are integrally extended with a first protruding edge (3) and a second protruding edge (4) on both sides respectively. The lower end of the first protruding edge (3) is fixedly connected with a plug (5) arranged in a rectangular array. The second protruding edge (4) is provided with a slot (6) arranged in a rectangular array. The plug (5) is inserted into the slot (6). The insert (5) has a through-hole (7), the cross-section of the pin hole (7) is wedge-shaped, and the lower end of the second protruding edge (4) is provided with a snap-fit ​​component; The snap-fit ​​assembly includes a first guide groove (8) formed at the lower end of the second protruding edge (4), a first guide block (9) slidably connected in the first guide groove (8), a transmission block (10) fixedly connected at the lower end of the first guide block (9), a groove (11) formed at the upper end of the transmission block (10), a return spring (12) fixedly connected to the bottom wall of the groove (11), a limit block (13) fixedly connected to the upper end of the return spring (12), a second guide groove (14) formed on both sides of the transmission block (10), a second guide block (15) slidably connected in the second guide groove (14), and a pin (16) fixedly connected to one side of the second guide block (15).

2. The automotive heat shield with an installation structure according to claim 1, characterized in that: The second protruding edge (4) is fixedly connected to the limiting sleeve (17) by the corresponding pin (16). The pin (16) passes through the limiting sleeve (17), and the pin (16) and the limiting sleeve (17) are slidably connected.

3. The automotive heat shield with an installation structure according to claim 1, characterized in that: The end of the pin (16) away from the second guide block (15) is a wedge-shaped structure, and the width of the outer end face of the wedge-shaped structure is half the width of the outer hole of the pin hole (7), and the inclination angle of the wedge-shaped end face is adapted to the wedge-shaped cross-sectional angle of the pin hole (7).

4. The automotive heat shield with an installation structure according to claim 1, characterized in that: The first guide groove (8) has a T-shaped cross section, and the second guide groove (14) has an inclined T-shaped cross section.

5. A car heat shield with an installation structure according to claim 1, characterized in that: The initial length of the reset spring (12) is two-thirds of the depth of the groove (11), and the height of the limiting block (13) is four-fifths of the depth of the groove (11). When the reset spring (12) is in its natural state, the top of the limiting block (13) is higher than the upper surface of the second convex edge (4).

6. A car heat shield with an installation structure according to claim 1, characterized in that: The transmission block (10) is designed as an isosceles trapezoid, and the wide side of the transmission block (10) is recessed.

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