Connecting flange for tail gas exhaust pipe of automobile engine

Abstract

The utility model discloses a connecting flange for an automobile engine tail gas exhaust pipe, which comprises a flange body and an exhaust pipe, the flange body is welded outside a pipe orifice of the exhaust pipe, mounting holes are symmetrically formed in the outer surface, far away from the exhaust pipe, of the flange body, and the connecting flange further comprises a buffer cushion mechanism. The buffer pad mechanism comprises a ring groove, a ring pad, an edge groove, a lug pad, a fixed hole, a fixed column, a spring and a rubber gasket, the ring groove used for clamping the ring pad is concavely formed in the position, between the mounting holes, of the surface of the flange body, the edge groove used for clamping the lug pad is concavely formed in the position, outside the ring groove, of the surface of the flange body, and the buffer pad mechanism is arranged at the position of the flange body. The flange body provides a certain buffering position through the buffering pad mechanism, and in the initial stage of aging and thinning of the rubber gasket and when a gap exists between the flange bodies, the annular pad buffers the force borne by the rubber gasket through the elasticity of the spring, provides elastic support, relieves the hard contact force borne by the rubber gasket, and prolongs the service life of the rubber gasket and the flange body.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a connecting flange for an automobile engine tail gas exhaust pipe. Background Art

[0002] A car engine converts internal energy into kinetic energy. Exhaust gases are discharged through a dedicated exhaust system. This system typically consists of multiple connected exhaust pipes, typically between two and four meters long. One end of the exhaust pipe connects to the engine, while the other end discharges the exhaust gases. Conventional flanges are used to connect the exhaust pipes.

[0003] In the prior art, a connecting flange for an automobile engine exhaust pipe is usually welded at the exhaust pipe outlet, and then the automobile exhaust pipe is fixedly connected by the flange with bolts and nuts. During the driving process of the automobile, a rubber pad is used for buffering between the flanges. The rubber pad between the flanges is subjected to excessive pressure, which easily causes premature aging of the rubber pad, resulting in a loose gap between the flanges, affecting the connection sealing of the exhaust pipe. To this end, we propose a connecting flange for an automobile engine exhaust pipe. Utility Model Content

[0004] The main purpose of the utility model is to provide a connecting flange for an automobile engine tail gas exhaust pipe. By arranging a buffering mechanism at the flange body, the flange body provides a certain buffering position with the buffering mechanism. In the early stage of aging and thinning of the rubber gasket, when a gap appears between the flange bodies, the ring gasket uses spring elasticity to buffer the force exerted on the rubber gasket and provides elastic support, thereby alleviating the hard contact force suffered by the rubber gasket and extending the service life of the rubber gasket and the flange body, which can effectively solve the problems raised in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A connecting flange for an automobile engine exhaust pipe comprises a flange body, an exhaust pipe, and a buffering mechanism (4). The flange body is welded to the outside of the exhaust pipe orifice, and the flange body is symmetrically provided with mounting holes on its outer surface away from the exhaust pipe. The buffering mechanism comprises a ring groove, a ring gasket, a side groove, an ear pad, a fixed hole, a fixed column, a spring, and a rubber gasket. The surface of the flange body between the mounting holes is recessed with a ring groove for clamping the ring gasket, and the surface of the flange body outside the ring groove is recessed with a side groove for clamping the ear pad. The ear pad is integrally formed on the outer pad body of the ring gasket. The ring gasket is provided with fixed holes distributed in an annular manner on the lower pad surface facing the ring groove, and fixed columns are protruded on the bottom hole wall of the fixed hole. A spring is inserted between the fixed column and the fixed hole. The ring gasket, the ear pad, and the surface of the flange body are pressed with a rubber gasket. The surface of the rubber gasket above the mounting hole and the exhaust pipe is penetrated with side holes and a core hole.

[0007] Furthermore, the diameter of the side hole of the rubber gasket is the same as the diameter of the cavity of the mounting hole, and the core hole of the rubber gasket is the same as the diameter of the exhaust pipe body;

[0008] By adopting the above technical solution, the bolts for locking the flange body can pass smoothly between the side hole and the mounting hole of the rubber gasket, and then the core hole of the rubber gasket and the cavity of the exhaust pipe can smoothly pass the exhaust gas.

[0009] Furthermore, a pin hole is formed on the surface of the rubber gasket, located between the side hole and the core hole, and a convex pin is inserted into the pin hole, and the convex pin is integrally formed on the surface of the ear pad body;

[0010] By adopting the above technical solution, the rubber gasket can be clamped on the convex pin of the ear pad through the pin hole for positioning and installation.

[0011] Furthermore, the pad body size of the ring pad is the same as the groove cavity size of the ring groove, and the pad body size of the ear pad is the same as the groove cavity size of the side groove;

[0012] By adopting the above technical solution, the ring pad and the ear pad can be smoothly clipped into the ring groove and the side groove respectively.

[0013] Furthermore, the diameter of the fixed column is smaller than the diameter of the spring coil, and the fixed column is embedded in the spring coil;

[0014] By adopting the above technical solution, the fixed column can be clamped into the spring coil for internal support.

[0015] Furthermore, the coil height of the spring is smaller than the cavity depth of the fixed hole;

[0016] By adopting the above technical solution, the spring can be smoothly clamped in the fixed hole, and the spring is not easy to fall out of the fixed hole when it bounces.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By setting a buffer mechanism on the flange body, the flange body provides a certain buffer position with the buffer mechanism. When the rubber gasket is aged and thinned in the early stage, when a gap appears between the flange bodies, the ring gasket uses spring elasticity to buffer the force on the rubber gasket and provides elastic support to alleviate the hard contact force suffered by the rubber gasket, thereby extending the service life of the rubber gasket and the flange body.

[0019] In addition, the ring gasket of the flange body is equipped with a fixed column and a fixed hole to clamp the spring. This design can absorb and alleviate the vibration generated by the car during driving, effectively reduce the vibration of the exhaust emission system, and improve the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural diagram of the present utility model.

[0021] Figure 2 This is a schematic diagram of the structure after the rubber gasket and flange body are separated in the utility model.

[0022] Figure 3 It is a schematic diagram of the explosion structure of the cushion mechanism in the utility model.

[0023] In the figure: 1. Flange body; 2. Exhaust pipe; 3. Mounting hole; 4. Buffer mechanism; 5. Ring groove; 6. Ring gasket; 7. Side groove; 8. Ear pad; 9. Fixed hole; 10. Fixed column; 11. Spring; 12. Rubber gasket; 13. Protruding pin; 14. Pin hole. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] like Figure 1-3 As shown, a connecting flange for an automobile engine exhaust pipe comprises a flange body 1, an exhaust pipe 2, and a buffer mechanism 4. The flange body 1 is welded to the outside of the pipe mouth of the exhaust pipe 2, and the outer surface of the flange body 1 away from the exhaust pipe 2 is symmetrically provided with mounting holes 3. The buffer mechanism 4 comprises an annular groove 5, an annular gasket 6, an edge groove 7, an ear pad 8, a fixed hole 9, a fixed column 10, a spring 11 and a rubber gasket 12. The surface of the flange body 1 between the mounting holes 3 is recessed to provide an annular groove 5 for clamping the annular gasket 6, and the annular groove 5 is provided. The outer surface of the flange body 1 is recessed with a side groove 7 for clamping the ear pad 8. The ear pad 8 is integrally formed outside the pad body of the ring pad 6. The ring pad 6 is provided with a circular distribution of fixed holes 9 on the lower pad surface facing the ring groove 5, and a fixed column 10 is raised at the bottom hole wall of the fixed hole 9. A spring 11 is clamped between the fixed column 10 and the fixed hole 9. A rubber gasket 12 is pressed on the surface of the ring gasket 6, ear pad 8 and flange body 1. The surface of the rubber gasket 12 above the mounting hole 3 and the exhaust pipe 2 is penetrated by side holes and a core hole.

[0026] The diameter of the side hole of the rubber gasket 12 is the same as the diameter of the cavity of the mounting hole 3, and the core hole of the rubber gasket 12 is the same as the diameter of the exhaust pipe 2;

[0027] By adopting the above technical solution, the bolts used to lock the flange body 1 can pass smoothly between the side holes of the rubber gasket 12 and the mounting hole 3, and then the core hole of the rubber gasket 12 and the tube cavity of the exhaust pipe 2 can smoothly pass the exhaust gas.

[0028] The surface of the rubber gasket 12 is provided with a pin hole 14 located between the side hole and the core hole, and a convex pin 13 is inserted into the pin hole 14. The convex pin 13 is integrally formed on the surface of the pad body of the ear pad 8.

[0029] By adopting the above technical solution, the rubber gasket 12 can be clamped on the protruding pin 13 of the ear pad 8 through the pin hole 14 for positioning and installation.

[0030] The pad body size of the ring pad 6 is the same as the groove cavity size of the ring groove 5, and the pad body size of the ear pad 8 is the same as the groove cavity size of the side groove 7;

[0031] By adopting the above technical solution, the ring pad 6 and the ear pad 8 can be smoothly snap-fitted into the ring groove 5 and the side groove 7 respectively.

[0032] The diameter of the fixed column 10 is smaller than the diameter of the spring coil 11, and the fixed column 10 is embedded in the spring coil 11;

[0033] By adopting the above technical solution, the fixed column 10 can be clamped into the spring coil of the spring 11 for internal support.

[0034] The coil height of the spring 11 is smaller than the cavity depth of the fixed hole 9;

[0035] By adopting the above technical solution, the spring 11 can be smoothly clamped in the fixed hole 9, and the spring 11 is not easy to fall out of the fixed hole 9 when it bounces.

[0036] The working principle of this utility model:

[0037] A buffer mechanism 4 is provided at the flange body 1. After the annular groove 5 and the side groove 7 of the buffer mechanism 4 are opened at the flange body 1 between the exhaust pipe 2 and the mounting hole 3, the spring 11 can be inserted between the fixed hole 9 and the fixed column 10 of the ring gasket 6. Then the ring gasket 6 can insert the side with the fixed hole 9 into the annular groove 5. At the same time, the ear pad 8 outside the ring gasket 6 is inserted into the side groove 7. At the same time, the surface of the ear pad 8 is positioned and clamped with a rubber gasket 12 with a pin hole 14 using a fixed pin 13 to cooperate with the rubber gasket 12 with a pin hole 14, so that the rubber gasket 12 can be pressed on the surface of the flange body 1. At this time, the mounting hole 3 and The side holes of the rubber gasket 12 can pass through bolts, so that the bolts pass through the mounting holes 3 of the other set of flange bodies 1 and are connected to the nuts, so that the rubber gasket 12 is pressed between the two sets of flange bodies 1. When force is applied between the flange bodies 1, the spring 11 at the ring gasket 6 forms an elastic support. In the early stage of aging and thinning of the rubber gasket 12, when a gap appears between the flange bodies 1, the ring gasket 6 uses the spring elasticity to buffer the force exerted on the rubber gasket 12 and provide elastic support, thereby alleviating the hard contact force suffered by the rubber gasket 12 and extending the service life of the rubber gasket 12 and the flange body 1.

[0038] It should be noted that the present invention is a connecting flange for an automobile engine exhaust pipe. The components in the present invention are all components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A connecting flange for an automobile engine exhaust pipe, comprising a flange body (1), an exhaust pipe (2), and a cushioning mechanism (4), wherein the flange body (1) is welded to the outside of the pipe opening of the exhaust pipe (2), and mounting holes (3) are symmetrically formed on the outer surface of the flange body (1) away from the exhaust pipe (2), and characterized in that: The cushion mechanism (4) comprises a ring groove (5), a ring gasket (6), a side groove (7), an ear pad (8), a fixed hole (9), a fixed column (10), a spring (11) and a rubber gasket (12); the surface of the flange body (1) between the mounting holes (3) is recessed to form a ring groove (5) for clamping the ring gasket (6); and the surface of the flange body (1) outside the ring groove (5) is recessed to form a side groove (7) for clamping the ear pad (8); the ear pad (8) is integrally formed on the ring gasket (6). ) outside the gasket body, the annular gasket (6) is provided with fixed holes (9) distributed in an annular manner on the lower pad surface facing the annular groove (5), and a fixed column (10) is protruded from the bottom hole wall of the fixed hole (9), a spring (11) is inserted between the fixed column (10) and the fixed hole (9), a rubber gasket (12) is pressed on the surface of the annular gasket (6), the ear pad (8) and the flange body (1), and a side hole and a core hole are penetrated through the surface of the rubber gasket (12) above the mounting hole (3) and the exhaust pipe (2).

2. The connecting flange for an automobile engine exhaust pipe according to claim 1, characterized in that: The diameter of the side hole of the rubber gasket (12) is the same as the diameter of the cavity of the mounting hole (3), and the core hole of the rubber gasket (12) is the same as the diameter of the pipe body of the exhaust pipe (2).

3. The connecting flange for an automobile engine exhaust pipe according to claim 1, characterized in that: The surface of the rubber gasket (12) is provided with a pin hole (14) located between the side hole and the core hole, and a convex pin (13) is inserted into the pin hole (14). The convex pin (13) is integrally formed on the surface of the pad body of the ear pad (8).

4. The connecting flange for an automobile engine exhaust pipe according to claim 1, characterized in that: The pad body size of the ring pad (6) is the same as the groove cavity size of the ring groove (5), and the pad body size of the ear pad (8) is the same as the groove cavity size of the side groove (7).

5. The connecting flange for an automobile engine exhaust pipe according to claim 1, characterized in that: The column diameter of the fixed column (10) is smaller than the coil diameter of the spring (11), and the fixed column (10) is embedded in the coil of the spring (11).

6. The connecting flange for an automobile engine exhaust pipe according to claim 1, characterized in that: The coil height of the spring (11) is smaller than the cavity depth of the fixed hole (9).

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