Wading waterproof structure of vehicle exhaust system

Abstract

The invention belongs to the technical field of vehicle exhaust systems, and relates to a wading waterproof structure of a vehicle exhaust system. A pivotal shaft (33) extending into a shell channel (37) is arranged on a mounting seat (310) of the switching valve body (3), the pivotal shaft (33) and a shell axial center line (38) form an angle alpha, a sealing ring (36) is perpendicular to the shell axial center line (38), the pivotal shaft (33) and the sealing ring (36) form an angle beta, the sealing ring (36) is arranged on the inner circle of the shell channel (37) along a circle, the pivotal shaft (33) is sleeved with a mounting sleeve (39) of a valve plate (34), the mounting sleeve (39) is located on one side of the valve plate (34), and the pivotal shaft (33) is sleeved with the sealing ring (36). And the sealing ring (36) is positioned on the other side of the valve plate (34). According to the wading waterproof structure of the vehicle exhaust system, the structure is simple, sealing of the exhaust system is achieved through closing of the waterproof structure when the vehicle wades into water or even floats on water, the waterproof valve sealing area and the pivot shaft are arranged on the two sides of the valve plate respectively, sealing at the pivot shaft does not need to be considered, and the sealing performance is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle exhaust systems, and more specifically, relates to a water-resistant structure for a vehicle exhaust system. Background Art

[0002] With the increase in vehicle application scenarios, vehicles need to wade through water or even float on water. When a vehicle wade through water, water will enter the interior through the vehicle exhaust system, causing damage to related components. The current sealing methods for vehicle exhaust systems are: 1. Use a ball valve sealing method and use elastic elements to provide support. With the continuous impact of high-temperature exhaust gas, the sealing area of ​​the ball valve will deform and the supporting force of the elastic element will decrease, resulting in a decrease in sealing ability; 2. Add a secondary exhaust pipe, the height of the secondary exhaust pipe from the ground is higher than the main exhaust pipe, thereby increasing the wading depth. This method has a complex structure and is limited by the height of the vehicle chassis, so the improvement is limited.

[0003] In the prior art, there is a technology named "A Waterproof Exhaust Pipe" with a publication (announcement) number of "CN209494617U". This technology discloses a waterproof exhaust pipe, including an exhaust pipe body, wherein the exhaust end of the exhaust pipe body is provided with a first bent pipe, and the intake end of the exhaust pipe body is provided with a second bent pipe. The intake end of the second bent pipe of the exhaust pipe body is connected to a connecting pipe, and the connecting pipe is flange-connected to the exhaust pipe of the motor vehicle. The outer radius of the second bent pipe is smaller than the outer radius of the exhaust pipe body. The first bent pipe, the exhaust pipe body, the second bent pipe, and the connecting pipe are welded end to end in sequence to form an integral exhaust channel. The exhaust channel is covered with an insulating inner pipe, and the outer part of the insulating inner pipe is covered with an insulating outer pipe. The beneficial effect of the new technology is to improve the wading of the motor vehicle intake system, improve the all-round protection of the motor vehicle in the event of long-term wading, and make up for the defect that the intake system wading modification cannot be turned off during wading. However, this technology does not involve the technical solution of the present application. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, a vehicle exhaust system wading waterproof structure with a simple structure is provided, which can seal the exhaust system by closing the waterproof structure when the vehicle is wading or even floating on water, and the sealing area of ​​the waterproof valve and the pivot shaft are respectively placed on both sides of the valve plate, without having to consider the sealing at the pivot shaft, and effectively improves the sealing performance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0006] The present invention is a water-proof structure for a vehicle exhaust system, a mounting seat is provided on the shell of a switching valve body, a pivot shaft extending into the interior of the shell channel is provided on the mounting seat, the pivot shaft and the axial center line of the shell form an angle α, the sealing ring is arranged perpendicular to the axial center line of the shell, the pivot shaft and the sealing ring form an angle β, a sealing ring is provided along the inner circle of the shell channel, the pivot shaft is sleeved in the mounting sleeve of the valve plate, the mounting sleeve is located on one side of the valve plate, the sealing ring is located on the other side of the valve plate, and the upper end of the valve plate and the lower end of the valve plate contact the sealing ring.

[0007] The switching valve body is installed on the vehicle exhaust system.

[0008] The switching valve body includes a limit block, an end cover, a pivot shaft, a valve plate, a shell, a sealing ring, and a shell channel.

[0009] The end cover is fixedly connected to the pivot shaft by welding, and the end cover is also connected to the actuator. The limit block is fixed on the pivot shaft, and a limit seat is arranged in the mounting seat.

[0010] The actuator comprises a DC motor, a worm, an intermediate gear, a sector gear with a magnet, a connector, and an actuator housing.

[0011] The DC motor, worm, intermediate gear, and sector gear with magnet are arranged in the outer body of the actuator. The rotating shaft of the DC motor is fixedly connected to the worm, the worm engages with the intermediate gear, and the intermediate gear engages with the sector gear with magnet. The connector is part of the actuator housing and is connected to the engine EMS system through a wiring harness.

[0012] The actuator and the switching valve body are connected via an intermediate bracket.

[0013] The angle α is an acute angle or an obtuse angle, and the angle β is an acute angle or an obtuse angle; when the angle α is an acute angle, the angle β is an acute angle, and when the angle α is an obtuse angle, the angle β is an obtuse angle.

[0014] The screw passes through the mounting sleeve and is screwed into the screw hole of the pivot shaft.

[0015] The housing channel and the valve plate are both circular structures, and the sealing ring is a circular ring structure.

[0016] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0017] The water-resistant structure of the vehicle exhaust system described in the present invention sets the arrangement of the pivot shaft and the valve plate inside the shell. The pivot shaft forms a certain angle (angle α) with the axial center line of the shell, and is not arranged vertically. The sealing area (sealing ring) also forms a certain angle (angle β) with the pivot shaft. In this way, the sealing area of ​​the waterproof valve and the pivot shaft are respectively placed on both sides of the valve plate, that is, the mounting sleeve of the valve plate is located on the side that will not contact the water outside. The sealing at the pivot shaft can be ignored, simplifying the structure. The outer side of the valve plate is always in contact with the inner wall of the sealing ring, directly controlling the axial movement of the pivot shaft. No additional structure or parts are required to control the axial clearance, effectively improving the sealing ability while effectively simplifying the structure. Compared with waterproof valves of other structures, the present invention has a simple structure and a compact layout. The sealing area is a circular ring area, and the sealing part only requires two parts: the valve plate and the sealing ring. The valve plate is a circular ring structure, and the sealing ring is a circular ring structure, which is conducive to size control and can adapt to the requirements of different leakage amounts. The two fit each other when sealed, and the sealing performance is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 This is a schematic structural diagram of the water-resistant structure of the vehicle exhaust system according to the present invention;

[0020] Figure 2 This is a schematic structural diagram of the water-resistant structure of the vehicle exhaust system according to the present invention;

[0021] Figure 3 A schematic diagram of the internal structure of the actuator of the water-proof structure of the vehicle exhaust system according to the present invention;

[0022] Figure 4 A schematic diagram of the internal structure of a switching valve body of the water-resistant structure of a vehicle exhaust system according to the present invention;

[0023] Figure 5 A schematic diagram of the arrangement structure of the pivot axis of the water-proof structure of the vehicle exhaust system according to the present invention;

[0024] Figure 6 A schematic diagram of the arrangement structure of the valve plate of the water-proof structure of the vehicle exhaust system according to the present invention;

[0025] The marks in the accompanying drawings are: 1. actuator; 11. DC motor; 12. worm; 13. intermediate gear; 14. sector gear with magnet; 15. connector; 16. actuator housing; 2. intermediate bracket; 3. switching valve body; 31. limit block; 32. end cover; 33. pivot shaft; 34. valve plate; 35. housing; 36. sealing ring; 37. housing channel; 38. housing axial center line; 39. mounting sleeve; 310. mounting seat; 311. limit seat; 312. upper end of valve plate; 313. lower end of valve plate. DETAILED DESCRIPTION

[0026] The following describes the embodiments with reference to the accompanying drawings to further explain in detail the specific embodiments of the present invention, such as the shapes, structures, mutual positions and connection relationships between the various components involved, the functions and working principles of the various components.

[0027] As attached Figure 1 -Attached Figure 6As shown, the present invention is a water-resistant structure for a vehicle exhaust system. A mounting seat 310 is mounted on the housing 35 of the switching valve body 3. Mounting seat 310 is provided on mounting seat 310, extending into the interior of the housing passage 37. Pivot shaft 33 forms an angle α with the housing's axial centerline 38. A sealing ring 36 is arranged perpendicular to the housing's axial centerline 38, forming an angle β with the pivot shaft 33. Sealing ring 36 is provided along the inner circumference of the housing passage 37. Pivot shaft 33 is sheathed within mounting sleeve 39 of valve plate 34. Mounting sleeve 39 is located on one side of the valve plate 34, while sealing ring 36 is located on the other side. The upper end 312 and lower end 313 of the valve plate contact sealing ring 36. The above structure addresses the shortcomings of the prior art and provides an improved technical solution. When setting up the structure, the arrangement of the pivot shaft 33 and the valve plate inside the housing 35 is set. The pivot shaft 33 is at a certain angle (angle α) to the axial centerline 38 of the housing, and is not arranged vertically. The sealing area (sealing ring 36) is also at a certain angle (angle β) to the pivot shaft 33. In this way, the sealing area of ​​the waterproof valve and the pivot shaft 33 are respectively placed on both sides of the valve plate, that is, the mounting sleeve 39 of the valve plate 34 is located on the side that will not contact the outside water. The sealing at the pivot shaft 33 can be ignored, simplifying the structure. The outer side of the valve plate 34 (the upper end 312 of the valve plate and the lower end 313 of the valve plate) is always in contact with the inner wall of the sealing ring 36, directly controlling the axial movement of the pivot shaft 33. No additional structure or parts are required to control the axial clearance, effectively improving the sealing ability while effectively simplifying the structure. Compared with waterproof valves of other structures, the present invention has a simple structure and a compact layout. The sealing area is a circular ring area, and the sealing part only requires two parts: the valve plate and the sealing ring. The valve plate 34 is an annular structure, and the sealing ring is also an annular structure, which facilitates size control and can adapt to different leakage requirements. The two seal against each other, providing good sealing performance. The vehicle exhaust system water-proof structure of the present invention has a simple structure. When the vehicle is wading or even floating on water, the exhaust system is sealed by closing the waterproof structure. The sealing area of ​​the waterproof valve and the pivot axis are located on either side of the valve plate, eliminating the need to worry about sealing at the pivot axis and effectively improving sealing performance.

[0028] The switching valve body 3 is installed in the vehicle's exhaust system. The above structure operates as follows: 1. When the vehicle is driving normally, the watertight valve is open, and the vehicle's exhaust system is exhausted normally through the switching valve body 3. 2. When the vehicle enters other modes (such as wading and floating modes), when the wading depth reaches a certain level, the wading sensor transmits a signal to the engine management system (EMS), which in turn sends a command to the watertight valve actuator to close the valve plate 34 of the watertight valve, thereby sealing it. 3. When the watertight valve needs to be closed, the actuator drives the pivot shaft 33, causing the valve plate 34 to rotate. When the valve plate 34 rotates to a certain position, it fully contacts the inner wall of the sealing ring 36, forming a sealing area that prevents water from passing through and achieving a sealing effect. 4. This valve has the advantages of high temperature resistance and strong sealing ability, making it suitable for sealing high-temperature airflow and is used in vehicle exhaust gas recirculation (EGR) systems. The present invention has a simple structure and strong sealing ability. Connecting to the exhaust pipe through welding, it not only meets the requirements of high-temperature exhaust, but also prevents water from entering the engine through the exhaust pipe and causing damage. At the same time, this invention interacts with the engine management system (EMS) in the form of electrical signals, and can open and close the waterproof valve according to instructions.

[0029] The switching valve body 3 includes a limit block 31, an end cap 32, a pivot shaft 33, a valve plate 34, a housing 35, a sealing ring 36, and a housing passage 37. The end cap 32 is fixedly connected to the pivot shaft 33 by welding and is also connected to the actuator 1. The limit block 31 is fixed to the pivot shaft 33, and a limit seat 311 is provided within the mounting seat 310. In the above structure, the switching valve body 3 drives the rotation of the end cap 32 and the pivot shaft 33 through the rotational force applied by the actuator 1, thereby opening and closing the valve plate 34. The end cap 32 is fixed to the pivot shaft 33 by welding and is also connected to the actuator 1. The main function of the end cap is thermal insulation, preventing heat from being conducted through the pivot shaft 33, which could cause the actuator 1 to fail. The valve plate 34 and the sealing ring 37 form a sealing structure. When the valve plate 34 reaches the position shown in the upper figure from the open position, the valve body has a sealing performance. In order to limit the further rotation of the valve plate 34, a limiter is added to control the rotation angle of the valve plate 34 within 0-90°.

[0030] The executor 1 comprises a direct current motor 11, a worm 12, an intermediate gear 13, a sector gear with magnet 14, a connecting head 15 and an executor shell 16. The direct current motor 11, the worm 12, the intermediate gear 13 and the sector gear with magnet 14 are arranged in the executor shell 16, the rotating shaft of the direct current motor 11 is fixedly connected with the worm 12, the worm 12 meshes with the intermediate gear 13, the intermediate gear 13 meshes with the sector gear with magnet 14, and the connecting head 15 is part of the executor shell 16. According to the above structure, the executor 1 is powered by the vehicle storage battery through the connecting head 15, the direct current motor 11 rotates to drive the worm 12 to rotate, the worm 12 drives the intermediate gear 13 and the sector gear with magnet 14 to rotate, at the same time, the sector gear with magnet 14 rotates to drive the magnet to rotate, and the position change of the magnet changes the direction of the magnetic induction line. The change is recognized by the Hall sensor and converted into an electric signal, which is transmitted to the engine management system (EMS) through the connecting head 15 to realize real-time feedback of the position signal. In this way, the switching control of the opening and closing of the switching valve body can be reliably realized.

[0031] The executor 1 and the switching valve body 3 are connected through the intermediate support 2. The alpha angle is an acute angle or an obtuse angle, the beta angle is an acute angle or an obtuse angle, the alpha angle is an acute angle, the beta angle is an acute angle, the alpha angle is an obtuse angle, and the beta angle is an obtuse angle. According to the above structure, the valve plate can be reliably arranged in the shell passage through angle control, and opening and closing control can be realized. The shell passage 37 and the valve plate 34 are circular structures, and the sealing ring 36 is a circular ring structure.

[0032] In the structure of the application, the screw is screwed in the screw hole of the pivot shaft 33 through the mounting sleeve 39. According to the above structure, the valve plate is connected with the pivot shaft 33 through the screw (or welding mode). When the pivot shaft 33 rotates, the outer side of the valve plate 34 is always in contact with the inner wall of the sealing ring 26 to directly control the axial movement of the pivot shaft 33, and no additional structure or part is needed to control the axial gap.

[0033] The water-resistant structure for a vehicle exhaust system according to the present invention comprises an actuator 1, an intermediate bracket 2, and a switching valve body 3. The switching valve body 2 is welded to the exhaust pipe at both ends, sealing the exhaust duct and disconnecting it from the outside world. The actuator 1 comprises a DC motor 11, a worm 12, an intermediate gear 13, a sector gear 14 with a magnet, and a connector 15. The actuator 1 is connected to the engine management system (EMS) via the connector 15, providing feedback on the actuator's real-time position. The switching valve body 3 comprises a stopper 31, an end cap 32, a pivot shaft 33, a valve plate 34, a housing 35, a sealing ring 36, and a housing passage (throat) 37. The pivot shaft 33 rotates, driving the valve plate 34 to rotate. The valve plate 34 and the sealing ring 36 form a seal. The pivot shaft 33 is not perpendicular to the axial direction of the housing 35, but rather forms an angle (acute or obtuse, depending on the orientation). Similarly, the rotation axis of the valve plate 34 also forms an angle with the centerline. The pivot shaft 33 and the valve plate 34 are fixed by welding or screw connection. The outer edge of the valve plate 34 is always in contact with the inner side of the sealing ring 36 during rotation, which can control the axial movement of the pivot shaft 33 without requiring additional parts or structures to limit the axial clearance.

[0034] The sealing ring is made of hard graphite. With the above structure, the sealing ring can effectively achieve a sealing effect.

[0035] The vehicle exhaust system water-resistant structure described in the present invention is designed to arrange the pivot shaft 33 and the valve plate inside the housing 35 during structural arrangement. The pivot shaft 33 forms a certain angle (angle α) with the axial centerline 38 of the housing, and is not arranged vertically. The sealing area (sealing ring 36) also forms a certain angle (angle β) with the pivot shaft 33. The sealing area of ​​the waterproof valve and the pivot shaft 33 are respectively placed on both sides of the valve plate, that is, the mounting sleeve 39 of the valve plate 34 is located on the side that will not contact the water outside. The sealing at the pivot shaft 33 can be ignored, simplifying the structure. The outer side of the valve plate 34 is always in contact with the inner wall of the sealing ring 36, directly controlling the axial movement of the pivot shaft 33. No additional structure or parts are required to control the axial clearance, effectively improving the sealing ability while simplifying the structure. Compared with waterproof valves of other structures, the present invention has a simple structure and a compact arrangement. The sealing area is a circular ring area, and the sealing part only requires two parts: the valve plate and the sealing ring. The valve plate 34 is a circular ring structure, and the sealing ring is also a circular ring structure, which is conducive to size control and can adapt to different leakage requirements. The two fit together when sealing and have good sealing performance.

[0036] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A water-proof structure for a vehicle exhaust system, characterized by: A mounting seat (310) is provided on the housing (35) of the switching valve body (3). A pivot shaft (33) extending into the interior of the housing channel (37) is provided on the mounting seat (310). The pivot shaft (33) and the axial center line (38) of the housing are at an angle α. The sealing ring (36) is arranged perpendicular to the axial center line (38) of the housing. The pivot shaft (33) and the sealing ring (36) are at an angle β. The sealing ring (36) is provided along the inner circle of the housing channel (37). The pivot shaft (33) is sleeved in the mounting sleeve (39) of the valve plate (34). The mounting sleeve (39) is located on one side of the valve plate (34). The sealing ring (36) is located on the other side of the valve plate (34). The upper end (312) and the lower end (313) of the valve plate contact the sealing ring (36).

2. The vehicle exhaust system wading and waterproof structure according to claim 1, characterized in that: The switching valve body (3) is installed on the vehicle exhaust system.

3. The vehicle exhaust system wading and waterproof structure according to claim 1 or 2, characterized in that: The switching valve body (3) comprises a limit block (31), an end cover (32), a pivot shaft (33), a valve plate (34), a housing (35), a sealing ring (36), and a housing channel (37).

4. The vehicle exhaust system water-proof structure according to claim 3, characterized in that: The end cover (32) is fixedly connected to the pivot shaft (33) by welding, and the end cover (32) is also connected to the actuator (1). The limit block (31) is fixed on the pivot shaft (33), and a limit seat (311) is provided in the mounting seat (310).

5. The vehicle exhaust system wading and waterproof structure according to claim 4, characterized in that: The actuator (1) comprises a DC motor (11), a worm (12), an intermediate gear (13), a sector gear with a magnet (14), a connector (15), and an actuator housing (16).

6. The vehicle exhaust system water-proof structure according to claim 5, characterized in that: The DC motor (11), the worm (12), the intermediate gear (13), and the sector gear (14) with a magnet are arranged in an actuator housing (16); the rotating shaft of the DC motor (11) is fixedly connected to the worm (12); the worm (12) engages with the intermediate gear (13); the intermediate gear (13) engages with the sector gear (14) with a magnet; the connector (15) is part of the actuator housing (16); and the connector (15) is connected to the engine EMS system through a wiring harness.

7. The water-proof structure for a vehicle exhaust system according to claim 4, characterized in that: The actuator (1) and the switching valve body (3) are connected via an intermediate bracket (2).

8. The water-proof structure for a vehicle exhaust system according to claim 1 or 2, characterized in that: The angle α is an acute angle or an obtuse angle, and the angle β is an acute angle or an obtuse angle; when the angle α is an acute angle, the angle β is an acute angle; when the angle α is an obtuse angle, the angle β is an obtuse angle.

9. The water-proof structure for a vehicle exhaust system according to claim 1 or 2, characterized in that: The screw passes through the mounting sleeve (39) and is screwed into the screw hole of the pivot shaft (33).

10. The water-proof structure for a vehicle exhaust system according to claim 1 or 2, characterized in that: The housing channel (37) and the valve plate (34) are both circular structures, and the sealing ring (36) is a circular ring structure.

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