An anti-loosening exhaust pipe shield assembly

Abstract

The present invention discloses an anti-loosening exhaust pipe shield assembly, comprising an exhaust pipe, a heat insulation shield, a first bolt and a second bolt, wherein an air outlet and a first air inlet are respectively arranged at two ends of the exhaust pipe, a plurality of second air inlets, a connecting plate and a boss are respectively arranged on the side wall of the exhaust pipe, an air intake branch pipe is fixed on the second air inlet, a first threaded hole is arranged in the boss, and a plurality of second threaded holes are also arranged around the boss on the side wall of the exhaust pipe, two heat insulation shields are respectively arranged on the outer side of the exhaust pipe and assembled into a heat insulation outer layer, a plurality of the second bolts are respectively passed through a fourth notch and screwed into the second threaded holes, a plurality of the first bolts are respectively screwed into the first threaded holes, a bottom surface of a first screw head of the first bolt is fitted with a top surface of a second screw head of a plurality of adjacent second bolts, the structure is simple and the appearance is beautiful, the bolts can be prevented from falling out, and thus the heat insulation shield can be effectively prevented from falling off.

Description

Technical Field

[0001] The invention relates to the technical field of automobile exhaust pipe systems, in particular to the technical field of an anti-loosening exhaust pipe shield assembly. Background Art

[0002] The automobile exhaust system is used to discharge the exhaust gas discharged by the engine while reducing noise and exhaust pollution. When the automobile exhaust pipe system discharges exhaust gas, the large amount of heat carried by the exhaust gas will heat the exhaust pipe, causing the surface temperature of the exhaust pipe to reach 500-600°C. Due to the limited space of the automobile chassis, most of the components around the automobile exhaust pipe system are close to the automobile exhaust pipe, and the normal operation of the surrounding components has strict requirements on temperature. If the temperature is high, it is easy to cause safety accidents. Therefore, it is necessary to install a heat shield outside the exhaust pipe. The existing heat shield usually adopts a multi-layer structure of a metal-wrapped heat insulation layer. Therefore, when the exhaust pipe shield assembly is subjected to a large vibration, the highly elastic heat insulation layer can easily cause the bolts connecting the heat shield and the exhaust pipe to loosen, thereby causing the heat shield to fall off the exhaust pipe. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide an anti-loosening exhaust pipe shield assembly with a simple structure and beautiful appearance, which can prevent the bolts from coming out and effectively prevent the heat shield from falling off.

[0004] To achieve the above-mentioned objectives, the present invention proposes an anti-loosening exhaust pipe shield assembly, including an exhaust pipe, a heat insulation shield, a first bolt and a second bolt, wherein the two ends of the exhaust pipe are respectively provided with an air outlet and a first air inlet, the side walls of the exhaust pipe are respectively provided with a plurality of second air inlets, a connecting plate and a boss, an intake branch pipe is fixed to the second air inlet, a first threaded hole is provided in the boss, and a plurality of second threaded holes are also provided on the side wall of the exhaust pipe around the boss, the heat insulation shield is respectively provided with a plurality of first notches, a second notch and a third notch for the intake branch pipe, the connecting plate and the boss to extend out, the heat insulation shield is also provided with a plurality of fourth notches corresponding to the second threaded holes, the two heat insulation shields are respectively covered on the outside of the exhaust pipe and assembled into an insulating outer layer, a plurality of the second bolts are respectively passed through the fourth notches and screwed into the second threaded holes, a plurality of the first bolts are respectively screwed into the first threaded holes, and the bottom surface of the first screw head of the first bolt is in contact with the top surface of the second screw head of the adjacent plurality of second bolts.

[0005] Preferably, the heat insulation cover comprises a first metal layer, a heat insulation cotton layer and a second metal layer from a side away from the exhaust pipe to a side close to the exhaust pipe.

[0006] Preferably, the end of the first metal layer is bent inwardly to form a first sealed end with a U-shaped cross section, and the end of the second metal layer is bent outwardly to form a second sealed end with a Z-shaped cross section, and the first sealed end and the second sealed end are fixed to each other.

[0007] Preferably, the first bolt includes a first screw head and a first screw rod located in the center of the bottom surface of the first screw head, and an annular wing is provided on the edge of the bottom surface of the first screw head. The second bolt includes a second screw head, a light rod located in the center of the bottom surface of the second screw head, and a second screw rod located at the bottom end of the light rod, and the end of the annular wing is in conflict with the top surface of the second screw head.

[0008] Preferably, the thickness of the annular wing gradually decreases from a side close to the first screw head to a side away from the first screw head.

[0009] Preferably, the end of the annular wing is provided with an arc head.

[0010] Preferably, the length of the polished rod is greater than the thickness of the heat insulation cover.

[0011] Beneficial effects of the present invention: the present invention fixes the heat insulation cover on the exhaust pipe by passing a plurality of second bolts through the fourth notch of the heat insulation cover and then screwing them into the second threaded holes on the outer wall of the exhaust pipe; passes a boss on the outer wall of the exhaust pipe through the third notch of the heat insulation cover, and then screws the first bolt into the first threaded hole on the boss, and the screw head of the first bolt is mortgaged against the screw head of the second bolt, thereby limiting the position of the second bolt to prevent it from falling out, thereby effectively preventing the heat insulation cover from falling off; and by respectively arranging a U-shaped first end cap and a Z-shaped second end cap at the ends of the first metal layer and the second metal layer, while preventing the heat insulation cotton between the metal layers from falling out, the thickness of the metal layer ends is reduced, thereby enhancing the aesthetics of the heat insulation cover.

[0012] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of an anti-loosening exhaust pipe shield assembly of the present invention;

[0014] Figure 2 It is a front view of an exhaust pipe of an exhaust pipe shield assembly of an anti-loosening type according to the present invention;

[0015] Figure 3 yes Figure 1 AA section view;

[0016] Figure 4 yes Figure 3 An enlarged schematic diagram of point B;

[0017] Figure 5It is a connection diagram of the exhaust pipe, the heat shield, the first bolt and the second bolt.

[0018] In the figure: 1-exhaust pipe, 11-air outlet, 12-first air inlet, 13-inlet branch pipe, 14-connecting plate, 15-boss, 16-first threaded hole, 17-second threaded hole, 2-heat insulation cover, 21-first metal layer, 211-first end cap, 22-second metal layer, 221-second end cap, 23-heat insulation cotton layer, 3-first bolt, 31-first screw head, 311-annular wing, 3111-arc head, 32-first screw rod, 4-second bolt, 41-second screw head, 42-bare rod, 43-second screw rod. DETAILED DESCRIPTION

[0019] See also Figures 1 to 5The present invention discloses an exhaust pipe shield assembly with an anti-loosening function, comprising an exhaust pipe 1, a heat shield 2, a first bolt 3 and a second bolt 4. The exhaust pipe 1 is provided with an air outlet 11 and a first air inlet 12 at both ends thereof, a plurality of second air inlets, a connecting plate 14 and a boss 15 are provided on the side wall of the exhaust pipe 1, an air inlet branch pipe 13 is fixed on the second air inlet, a first threaded hole 16 is provided in the boss 15, a plurality of second threaded holes 17 are provided on the side wall of the exhaust pipe 1 around the boss 15, and a plurality of second threaded holes 18 are provided on the heat shield 2. The heat shield 2 is provided with a first notch, a second notch and a third notch for the air intake branch pipe 13, the connecting plate 14 and the boss 15 to extend out, the heat shield 2 is further provided with a plurality of fourth notches corresponding to the second threaded holes 17, the two heat shields 2 are respectively arranged on the outside of the exhaust pipe 1 and assembled into a heat insulating outer layer, a plurality of the second bolts 4 are respectively passed through the fourth notches and screwed into the second threaded holes 17, a plurality of the first bolts 3 are respectively screwed into the first threaded holes 16, and the bottom surface of the first screw head 31 of the first bolt 3 is connected to the second threaded holes 17 of the adjacent plurality of second bolts 4. The top surface of the screw head 4 is in contact with each other, the heat insulation cover 2 includes a first metal layer 21, a heat insulation cotton layer 23 and a second metal layer 22 from the side away from the exhaust pipe 1 to the side close to the exhaust pipe 1, the end of the first metal layer 21 is bent inward to form a first end cap 211 with a U-shaped cross section, and the end of the second metal layer 22 is bent outward to form a second end cap 221 with a Z-shaped cross section, the first end cap 211 and the second end cap 221 are fixed to each other, the first bolt 3 includes a first screw head 31 and a first screw rod 3 located at the center of the bottom surface of the first screw head 31 2, an annular wing 311 is provided at the bottom edge of the first screw head 31, the second bolt 4 includes a second screw head 41, a light rod 42 located at the center of the bottom surface of the second screw head 41 and a second screw rod 43 located at the bottom end of the light rod 42, the end of the annular wing 311 is in conflict with the top surface of the second screw head 41, the thickness of the annular wing 311 gradually decreases from the side close to the first screw head 31 to the side away from the first screw head 31, the end of the annular wing 311 is provided with an arc head 3111, and the length of the light rod 42 is greater than the thickness of the heat insulation cover 2.

[0020] Working process of the present invention:

[0021] During the installation process, first, the two heat insulation covers 2 are respectively placed on the outside of the exhaust pipe 1 and assembled into a heat insulation outer layer, then the second bolt 4 is passed through the fourth notch and screwed into the second threaded hole 17, and then the first bolt 3 is screwed into the first threaded hole 16, so that the first screw head 31 gradually approaches the second screw heads 42 of the plurality of second bolts 4 located around the first bolt 3, until the arc head 3111 of the annular wing 311 presses against the top surface of the second screw head 42. During use, the exhaust pipe 1 is installed in the vehicle through the connecting plate 14, and is connected to the plurality of cylinders through the first air inlet 12 and the plurality of air inlet branches 13 to complete the air intake.

[0022] The present invention fixes the heat insulation cover on the exhaust pipe by passing a plurality of second bolts through the fourth notch of the heat insulation cover and then screwing them into the second threaded holes on the outer wall of the exhaust pipe; passes a boss on the outer wall of the exhaust pipe through the third notch of the heat insulation cover, and then screws the first bolt into the first threaded hole on the boss, and the screw head of the first bolt is mortgaged against the screw head of the second bolt, thereby limiting the position of the second bolt to prevent it from coming out, thereby effectively preventing the heat insulation cover from falling off; and provides a U-shaped first end cap and a Z-shaped second end cap at the ends of the first metal layer and the second metal layer respectively, thereby preventing the heat insulation cotton between the metal layers from coming out and reducing the thickness of the ends of the metal layers, thereby enhancing the aesthetics of the heat insulation cover.

[0023] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. An anti-loosening exhaust pipe cover assembly, characterized in that: The invention comprises an exhaust pipe (1), a heat insulation cover (2), a first bolt (3) and a second bolt (4); an exhaust port (11) and a first air inlet (12) are respectively provided at two ends of the exhaust pipe (1); a plurality of second air inlets, a connecting plate (14) and a convex column (15) are respectively provided on the side wall of the exhaust pipe (1); an air inlet branch pipe (13) is fixed to the second air inlet; a first threaded hole (16) is provided in the convex column (15); a plurality of second threaded holes (17) are also provided on the side wall of the exhaust pipe (1) around the convex column (15); the heat insulation cover (2) and the first bolt (3) are respectively provided on the side wall of the exhaust pipe (1); a plurality of second threaded holes (17) are provided around the convex column (15); and a plurality of second threaded holes (17) are provided on the side wall of the exhaust pipe (1) around the convex column (15). The cover (2) is respectively provided with a plurality of first notches, second notches and third notches for the intake branch pipe (13), the connecting plate (14) and the boss (15) to extend out, and the heat insulation cover (2) is also provided with a plurality of fourth notches corresponding to the second threaded holes (17). The two heat insulation covers (2) are respectively provided on the outside of the exhaust pipe (1) and assembled to form a heat insulation outer layer. A plurality of the second bolts (4) are respectively passed through the fourth notches and then screwed into the second threaded holes (17), and a plurality of the first bolts (3) are respectively screwed into the first threaded holes (16). The bottom surface of the first screw head (31) of the first bolt (3) is in contact with the top surfaces of the second screw heads (41) of the adjacent plurality of second bolts (4); the heat shield (2) comprises a first metal layer (21), a heat insulating cotton layer (23) and a second metal layer (22) extending from a side away from the exhaust pipe (1) to a side close to the exhaust pipe (1); an end of the first metal layer (21) is bent inwardly to form a first sealing end (211) with a U-shaped cross section, and an end of the second metal layer (22) is bent outwardly to form a second sealing end (221) with a Z-shaped cross section. The first sealing end (211) and the second sealing end (221) are fixed to each other; the first bolt (3) comprises a first screw head (31) and a first screw rod (32) located at the center of the bottom surface of the first screw head (31); an annular wing (311) is provided at the edge of the bottom surface of the first screw head (31); the second bolt (4) comprises a second screw head (41), a light rod (42) located at the center of the bottom surface of the second screw head (41) and a second screw rod (43) located at the bottom end of the light rod (42); the end of the annular wing (311) is in conflict with the top surface of the second screw head (41).

2. The anti-loosening exhaust pipe cover assembly according to claim 1, characterized in that: The thickness of the annular wing (311) gradually decreases from a side close to the first screw head (31) to a side away from the first screw head (31).

3. The anti-loosening exhaust pipe cover assembly according to claim 1, characterized in that: The end of the annular wing (311) is provided with an arc head (3111).

4. The anti-loosening exhaust pipe cover assembly according to claim 1, characterized in that: The length of the polished rod (42) is greater than the thickness of the heat insulation cover (2).

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