CN111963291B

CN111963291B - Exhaust funnel

Info

Publication number: CN111963291B
Application number: CN202010921028.4A
Authority: CN
Inventors: 郑逸
Original assignee: Individual
Current assignee: Chongqing Lingchuan Auto Parts Manufacturing Technology Co ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-05-25
Anticipated expiration: 2040-09-04
Also published as: CN111963291A

Abstract

The invention belongs to the field of automobile exhaust pipes, and particularly relates to an exhaust cylinder which comprises an exhaust cylinder, a pressure dividing pipe, a sliding plug, a screw rod, a spring A, a conical plate, a guide rod, a ring sleeve E, a cover plate, a spring B and the like, wherein three pressure dividing pipes communicated with one end, close to an engine, of the exhaust cylinder are uniformly arranged on the exhaust cylinder with a silencer in the circumferential direction, and the three pressure dividing pipes are parallel to the exhaust cylinder; the three conical plates which are uniformly hinged in the circumferential direction in the exhaust funnel are radially opened when the exhaust pressure of an automobile engine is larger and are swung back and closed when the exhaust pressure of the automobile engine is smaller, so that the exhaust pressure of the exhaust funnel is kept balanced, the phenomenon that road surface water submerging the exhaust funnel is sucked into the exhaust funnel due to the fact that the exhaust pressure at the exhaust port of the exhaust funnel is greatly fluctuated when oil is added and reduced in an engine is avoided, and the phenomenon that rainwater sucked into the exhaust funnel corrodes the exhaust funnel due to the fact that the rainwater is not timely discharged is avoided.

Description

Exhaust funnel

Technical Field

The invention belongs to the field of automobile exhaust pipes, and particularly relates to an exhaust funnel.

Background

In heavy rain, the water level of the road with low terrain can be greatly increased, and when the automobile passes through the road section, the exhaust funnel of the automobile can be submerged without water accumulated on the road surface. The automobile running in water is inevitably switched between oil reduction and oil filling, and the exhaust pressure at the exhaust port of the exhaust funnel is suddenly high and suddenly low in the switching process of deep stepping and shallow stepping of the automobile accelerator, so that the thrust generated by the exhaust funnel on the peripheral accumulated water is suddenly high and suddenly low. When the thrust of gas discharged from the exhaust funnel to the surrounding accumulated water is reduced, the accumulated water is easily sucked or flushed into the exhaust funnel, and if the accumulated water sucked or flushed into the exhaust funnel cannot be discharged in time, the exhaust funnel is seriously corroded, and the exhaust efficiency of the exhaust funnel is reduced.

Therefore, it is necessary to design an exhaust funnel to solve the above problems.

The invention designs an exhaust funnel to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses an exhaust funnel which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

An exhaust funnel comprises an exhaust funnel, a silencer, pressure dividing pipes, sliding plugs, a screw rod, a spring A, a ring sleeve C, a limiting block A, a ring sleeve D, a connecting rod A, an arc-shaped rod, a conical plate, a guide rod, a ring sleeve E, a connecting rod B, a swing rod, a swing shaft, a cover plate and a spring B, wherein the three pressure dividing pipes communicated with one end, close to an engine, of the exhaust funnel are uniformly arranged on the exhaust funnel, which is provided with the silencer, in the circumferential direction, and the three pressure dividing pipes are parallel to the exhaust funnel; two sliding plugs are arranged in each partial pressure pipe in a sliding fit mode, and hydraulic oil is sealed between the two sliding plugs. The hydraulic oil sealed between the two sliding plugs can prevent the leakage of high-pressure waste gas entering the pressure dividing pipe while transmitting the exhaust pressure of the engine, and the exhaust pressure transmitted from the engine in the pressure dividing pipe is ensured to be lossless. The ring sleeve C nested and sliding on the exhaust funnel is fixedly connected with a sliding plug which is far away from an engine in the three pressure dividing pipes through three screw rods which are uniformly distributed in the circumferential direction; each screw is nested with a spring A for resetting the ring sleeve C, and the screw is provided with a structure for adjusting the pretension of the spring A; three limiting blocks A matched with the ring sleeve C are uniformly arranged on the exhaust funnel in the circumferential direction, so that the ring sleeve C is prevented from sliding back in a transition mode under the pulling of the spring A.

Three conical plates for adjusting the diameter of the exhaust port of the exhaust funnel according to the exhaust pressure of the engine are uniformly hinged on the inner wall of the exhaust funnel in the circumferential direction; an arc-shaped rod is fixedly arranged on each conical plate and slides in an arc-shaped sliding groove A on the exhaust funnel around the hinged point of the corresponding conical plate; the exposed end of each arc-shaped rod is hinged with a ring sleeve D which axially slides on the outer side of the exhaust funnel through a connecting rod A; the ring sleeve C is in transmission connection with the ring sleeve D, and the axial movement directions of the ring sleeve C and the ring sleeve D on the exhaust funnel are opposite.

A cover plate for opening and closing an exhaust port of the exhaust funnel is hinged at the exhaust port of the exhaust funnel through a pendulum shaft fixedly arranged on the cover plate, and two springs B for keeping the cover plate in an open or closed state are symmetrically arranged on the exhaust funnel; the ring sleeve E nested and sliding on the exhaust funnel is hinged with a swing rod fixedly arranged on a swing shaft through a connecting rod B; three guide rods which are uniformly arranged on the ring sleeve D in the circumferential direction are respectively in sliding fit with the three sliding grooves B on the ring sleeve E; and each guide rod is provided with a structure for driving the ring sleeve E to reciprocate.

As a further improvement of the technology, the guide rod is provided with a limiting ring and a limiting block B which drive the ring sleeve E to move. When the guide rod moves away from the engine, the limiting ring drives the ring sleeve E to move towards the direction close to the cover plate, and the ring sleeve E drives the cover plate to open the exhaust port of the exhaust funnel through the connecting rod B, the swing rod and the swing shaft. The limiting block drives the ring sleeve E to move towards the direction far away from the cover plate when the guide rod moves towards the direction close to the engine, and the ring sleeve E drives the cover plate to close the exhaust port of the exhaust funnel through the connecting rod B, the swing rod and the swing shaft. Each screw is screwed with a nut A and a nut B for locking the nut A on the screw; a ring sleeve B is nested on the screw rod and is in rotary fit with a sliding sleeve fixedly connected with the nut A; one end of the spring A is connected with the ring sleeve B, and the other end of the spring A is connected with the tail end of the corresponding pressure dividing pipe; a ring sleeve A which is nested and fixedly arranged on the sliding sleeve rotates in a ring groove C on the inner wall of a ring sleeve B; three guide strips are uniformly arranged on the outer side of the exhaust funnel in the circumferential direction and are in sliding fit with the three guide grooves A on the inner wall of the ring sleeve C and the three guide grooves B on the inner wall of the ring sleeve D respectively. The guide strip is matched with the guide groove A and the guide groove B to play a role in positioning and guiding the axial sliding of the ring sleeve C and the ring sleeve D on the exhaust sleeve.

As a further improvement of the technology, the pressure dividing pipe is fixed on the outer side of the exhaust pipe through a fixed seat; two annular grooves B which are distributed axially are formed in the outer cylindrical surface of the sliding plug, and a sealing ring B which is in sealing fit with the inner wall of the corresponding pressure dividing pipe is installed in each annular groove B; an annular groove A is formed in the inner wall of each sliding groove A, and a sealing ring A in sealing fit with the corresponding arc-shaped rod is mounted in each annular groove A.

As a further improvement of the technology, two L seats B are symmetrically arranged on the outer side of the exhaust port of the exhaust funnel, and a swing block B hinged to the tail end of each L seat B is connected with a swing block A hinged to the same side of the cover plate through a spring B on the same side; the spring B is an extension spring; the cover plate is hinged with two L seats A symmetrically arranged on the outer side of the exhaust funnel through a swing shaft; and the L seat A is provided with a swing limiting block for limiting the swing amplitude of the cover plate. The swing blocks A and B arranged at the two ends of the spring B respectively swing around the corresponding hinge pins in the opening and closing process of the exhaust port of the exhaust funnel through the cover plate in a self-adaptive mode, fatigue failure of the spring B due to repeated bending deformation caused by the fact that the two ends of the spring B are fixedly connected with the exhaust funnel and the cover plate is avoided, the service life of the spring B is effectively prolonged, and the effective effect of the spring B on the cover plate is guaranteed.

As a further improvement of the technology, three racks a parallel to the exhaust pipe are uniformly arranged on the ring sleeve C in the circumferential direction, three racks B parallel to the exhaust pipe are uniformly arranged on the ring sleeve D in the circumferential direction, and the racks a correspond to the racks B one to one; the rack A and the rack B which correspond to each other are simultaneously meshed with a gear arranged on the outer side of the exhaust pipe, and the moving directions of the rack A and the rack B are opposite; each gear is installed in a U-shaped seat, and the rack A and the rack B slide in the U-shaped seats.

Compared with the traditional automobile exhaust funnel, the balance of the exhaust pressure of the exhaust port of the exhaust funnel is kept by radially opening three conical plates which are uniformly hinged in the circumferential direction in the exhaust funnel when the exhaust pressure of an automobile engine is larger and swinging back and closing when the exhaust pressure of the automobile engine is smaller, so that the phenomenon that accumulated water on the road surface submerging the exhaust funnel is sucked into the exhaust funnel due to the fact that the exhaust pressure at the exhaust port of the exhaust funnel is greatly fluctuated when oil is added and reduced in the engine is avoided, the phenomenon that the exhaust funnel is corroded due to the fact that rainwater sucked into the exhaust funnel is not timely discharged is avoided, the service life of the exhaust funnel is prolonged, and the exhaust efficiency of the exhaust funnel.

Meanwhile, the exhaust port of the exhaust funnel is quickly opened by the cover plate when the automobile is started, and the exhaust port of the exhaust funnel is automatically closed by the cover plate when the automobile engine stops running, so that the exhaust funnel is prevented from being broken down due to the fact that insects, rats and ants enter the exhaust funnel in the idle process of the automobile, and the normal use of the exhaust funnel is guaranteed. And the closed cover plate can prevent rainwater from submerging the exhaust pipe and then entering the engine through the exhaust pipe to damage the engine in the idle process of the automobile. The invention has simple structure and better use effect.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention and its entirety.

FIG. 2 is a schematic cross-sectional view of the sliding plug, screw, ring B, nut A, nut B, ring C, rack A, and gear and rack B.

FIG. 3 is a schematic cross-sectional view of the exhaust funnel, the ring C, the rack A, the gear, the rack B, the ring D, the connecting rod A, the arc rod and the cone plate.

FIG. 4 is a cross-sectional view of the ring sleeve D, the connecting rod A, the arc rod, the sealing ring B and the exhaust funnel.

Fig. 5 is a schematic cross-sectional view of two viewing angles of the cover plate, the swing block a, the spring B, the swing block B, L, the exhaust funnel, the L seat a, the swing shaft, the swing rod, the connecting rod B and the ring sleeve E.

FIG. 6 is a schematic cross-sectional view of the tool bar B, the limiting ring, the limiting block B, the ring sleeve E, the exhaust funnel, the cover plate, the swing link, and the connecting rod B.

FIG. 7 is a schematic view of the cover plate, the swing shaft and the swing link.

FIG. 8 is a schematic view of an exhaust stack.

Fig. 9 is a partial sectional view of the exhaust funnel.

Figure 10 is a schematic view of a loop D and a loop C.

Figure 11 is a schematic view of loop E.

Figure 12 is a cross-sectional view of the cuff B.

Fig. 13 is a schematic view of a spool.

Number designation in the figures: 1. an exhaust funnel; 3. a chute A; 4. a ring groove A; 5. a muffler; 6. a pressure dividing pipe; 7. a fixed seat; 8. a sliding plug; 9. a ring groove B; 10. a seal ring B; 11. a screw; 12. a spring A; 13. a nut A; 14. a sliding sleeve; 15. a ring sleeve A; 16. a ring sleeve B; 17. a ring groove C; 18. a nut B; 19. c, sleeving a ring sleeve; 20. a guide groove A; 21. a limiting block A; 22. a rack A; 23. a gear; 24. a rack B; 25. a U-shaped seat; 26. a ring sleeve D; 27. a guide groove B; 28. conducting bars; 29. a connecting rod A; 30. an arcuate bar; 31. a sealing ring A; 32. a conical plate; 33. a guide bar; 34. a limiting ring; 35. a limiting block B; 36. a loop E; 37. a connecting rod B; 38. a swing rod; 39. a pendulum shaft; 40. a cover plate; 41. an L seat A; 42. an L seat B; 43. a swinging block B; 44. a spring B; 45. a swinging block A; 46. a chute B; 47. and a swing limiting block.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, 2 and 3, the exhaust pipe comprises an exhaust pipe 1, a silencer 5, a pressure dividing pipe 6, a sliding plug 8, a screw 11, a spring a12, a ring sleeve C19, a limit block a21, a ring sleeve D26, a connecting rod a29, an arc rod 30, a conical plate 32, a guide rod 33, a ring sleeve E36, a connecting rod B37, a swing rod 38, a swing shaft 39, a cover plate 40 and a spring B44, wherein as shown in fig. 1, three pressure dividing pipes 6 communicated with one end of the exhaust pipe 1 close to an engine are uniformly arranged on the exhaust pipe 1 on which the silencer 5 is arranged in the circumferential direction, and the three pressure dividing pipes 6 are parallel to the exhaust pipe 1; two sliding plugs 8 are matched in each pressure dividing pipe 6 in a sliding mode, and hydraulic oil is sealed between the two sliding plugs 8. The hydraulic oil sealed between the two sliding plugs 8 can transmit the exhaust pressure of the engine and prevent the high-pressure exhaust gas entering the pressure dividing pipe 6 from leaking, so that the exhaust pressure transmitted from the engine in the pressure dividing pipe 6 is ensured to be free from loss. As shown in fig. 1 and 2, a ring sleeve C19 nested and sliding on the exhaust funnel 1 is fixedly connected with a sliding plug 8 far away from an engine in three pressure-dividing pipes 6 through three screws 11 uniformly distributed in the circumferential direction; each screw 11 is nested with a spring A12 for resetting the ring sleeve C19, and the screw 11 is provided with a structure for adjusting the pretension of the spring A12; three limiting blocks A21 matched with the ring sleeve C19 are uniformly arranged on the exhaust tube 1 in the circumferential direction, so that the ring sleeve C19 is prevented from sliding back in the transition under the pulling of the spring A12.

As shown in fig. 1, 3 and 4, three conical plates 32 for adjusting the diameter of the exhaust port of the exhaust funnel 1 according to the exhaust pressure of the engine are uniformly hinged on the inner wall of the exhaust funnel 1 in the circumferential direction; as shown in fig. 4, 8 and 9, an arc rod 30 is fixedly mounted on each conical plate 32, and the arc rod 30 slides in an arc chute a3 on the exhaust funnel 1 around the hinge point of the corresponding conical plate 32; the exposed end of each arc rod 30 is hinged with a ring sleeve D26 which axially slides outside the exhaust funnel 1 through a connecting rod A29; as shown in fig. 2 and 3, the ring C19 is in driving connection with the ring D26, and the ring C19 is opposite to the axial movement direction of the ring D26 on the exhaust funnel 1.

As shown in fig. 5, 6 and 7, the cover plate 40 for opening and closing the exhaust port of the exhaust funnel 1 is hinged to the exhaust port of the exhaust funnel 1 through the swing shaft 39 fixedly mounted on the cover plate, and two springs B44 for keeping the cover plate 40 in an open or closed state are symmetrically mounted on the exhaust funnel 1; as shown in fig. 3 and 5, a ring sleeve E36 nested and sliding on the exhaust funnel 1 is hinged with a swing rod 38 fixedly arranged on a swing shaft 39 through a connecting rod B37; as shown in fig. 3, 6 and 11, three guide rods 33 uniformly arranged on the ring sleeve D26 in the circumferential direction are respectively in sliding fit with three sliding grooves B46 on the ring sleeve E36; each guide rod 33 is provided with a structure for driving the ring sleeve E36 to reciprocate.

As shown in fig. 3 and 6, the guide rod 33 is provided with a stop ring 34 and a stop block B35 for driving the ring sleeve E36 to move. When the guide rod 33 moves away from the engine, the limiting ring 34 drives the ring sleeve E36 to move towards the direction close to the cover plate 40, and the ring sleeve E36 drives the cover plate 40 to open the exhaust port of the exhaust cylinder 1 through the connecting rod B37, the swing rod 38 and the swing shaft 39. When the guide rod 33 moves towards the direction close to the engine, the limiting block drives the ring sleeve E36 to move towards the direction far away from the cover plate 40, and the ring sleeve E36 drives the cover plate 40 to close the exhaust port of the exhaust cylinder 1 through the connecting rod B37, the swing rod 38 and the swing shaft 39. As shown in fig. 2 and 12, each screw 11 is screwed with a nut a13 and a nut B18 for locking the nut a13 to the screw 11; a ring sleeve B16 is rotatably matched with the sliding sleeve 14 which is nested on the screw rod 11 and fixedly connected with the nut A13; one end of the spring A12 is connected with the ring sleeve B16, and the other end is connected with the tail end of the corresponding partial pressure tube 6; a ring sleeve A15 nested and fixedly arranged on the sliding sleeve 14 rotates in a ring groove C17 on the inner wall of a ring sleeve B16; as shown in fig. 3 and 10, three guide bars 28 are uniformly installed on the outer side of the exhaust tube 1 in the circumferential direction, and the three guide bars 28 are respectively in sliding fit with three guide grooves a20 on the inner wall of the ring sleeve C19 and three guide grooves B27 on the inner wall of the ring sleeve D26. The cooperation of the guide bar 28 with the guide grooves a20 and B27 provides a positioning guide for the axial sliding of the ring C19 and the ring D26 on the exhaust sleeve.

As shown in fig. 1 and 2, the pressure dividing pipe 6 is fixed to the outer side of the exhaust pipe through a fixing seat 7; as shown in fig. 1, 2 and 13, the outer cylindrical surface of the sliding plug 8 is provided with two axially distributed ring grooves B9, and each ring groove B9 is provided with a sealing ring B10 which is in sealing fit with the inner wall of the corresponding partial pressure pipe 6; as shown in fig. 4 and 9, each sliding groove A3 has a circular groove a4 on its inner wall, and a sealing ring a sealingly engaged with the corresponding curved rod 30 is mounted in the circular groove a 4.

As shown in fig. 5 and 6, two L seats B42 are symmetrically installed on the outer side of the exhaust port of the exhaust funnel 1, and a swing block B43 hinged to the tail end of the L seat B42 is connected to a swing block a45 hinged to the same side of the cover plate 40 through a spring B44 on the same side; the spring B44 is an extension spring; the cover plate 40 is hinged with two L seats A41 symmetrically arranged on the outer side of the exhaust funnel 1 through a swing shaft 39; the L-seat a41 is provided with a swing limit block 47 for limiting the swing range of the cover plate 40. The swinging blocks A45 and B43 installed at the two ends of the spring B44 respectively swing around corresponding hinge pins in the process of opening and closing the exhaust port of the exhaust funnel 1 by the cover plate 40 in a self-adaptive manner, so that the fatigue failure of the spring B44 caused by repeated bending deformation due to the fact that the two ends of the spring B44 are fixedly connected with the exhaust funnel 1 and the cover plate 40 is avoided, the service life of the spring B44 is effectively prolonged, and the effective action of the spring B44 on the cover plate 40 is guaranteed.

As shown in fig. 1, 2 and 3, three racks a22 parallel to the exhaust pipe 1 are uniformly arranged on the ring sleeve C19 in the circumferential direction, three racks B24 parallel to the exhaust pipe 1 are uniformly arranged on the ring sleeve D26 in the circumferential direction, and the racks a22 correspond to the racks B24 one by one; the rack A22 and the rack B24 which correspond to each other are simultaneously meshed with the gear 23 arranged on the outer side of the exhaust pipe, and the moving directions of the rack A22 and the rack B24 are opposite; each gear 23 is mounted in a U-shaped seat 25, and rack A22 and rack B24 slide within U-shaped seats 25.

The silencer 5 of the present invention is of the prior art.

According to the invention, hydraulic oil sealed between the two sliding plugs 8 is used for transmitting the exhaust pressure of the engine and preventing high-pressure waste gas entering the pressure dividing pipe 6 from leaking, so that the exhaust pressure transmitted from the engine in the pressure dividing pipe 6 is ensured to be lossless.

Aiming at engines of different models, the pretensioning amount of the three springs A12 in the invention is effectively adjusted, the larger the engine displacement is, the larger the pretensioning amount of the spring A12 is, the smaller the engine displacement is, and the smaller the pretensioning amount of the spring is, so that the exhaust pressure of the engine can effectively realize the opening and closing of the three conical plates 32 when the accelerator is increased or decreased.

The working process of the invention is as follows: in the initial state, the cover plate 40 closes the exhaust stack 1 port, and both springs B44 are in tension. The three cone plates 32 are in a fully merged state. The three springs A12 are all in a stretching state, and the limiting block A21 is in contact with one end of the ring sleeve C19 and limits the sliding amplitude of the ring sleeve C19 towards the engine direction. Nut B18 is in a locked state against corresponding nut a 13. The three screws 11 are respectively retracted to the extreme positions in the corresponding partial pressure pipes 6. The ring E36 contacts the stop ring 34, and a space is reserved between the ring E36 and the stop block B35.

When the vehicle engine is started, one part of high-pressure tail gas exhausted from the engine moves outwards through the exhaust funnel 1, and the other part of the high-pressure tail gas enters the three pressure-dividing pipes 6 and pushes the two sliding plugs 8 in each pressure-dividing pipe 6 to slide towards the opening direction of the exhaust funnel 1. Two sliding plugs 8 in each pressure division pipe 6 drive a ring sleeve C19 to axially move towards the opening direction of the exhaust funnel 1 relative to the exhaust funnel 1 through corresponding screws 11, and the ring sleeve C19 drives three racks A22 to synchronously move. The collar C19 disengages from the stop a21 and each screw 11 further stretches the spring a12 through the corresponding nut a13, sliding sleeve 14 and collar B16.

The three racks A22 drive the corresponding rack B24 to move in the direction opposite to the rack A22 through the corresponding gears 23, the three racks B24 drive the ring sleeve D26 to move synchronously, the ring sleeve D26 drives the three arc-shaped rods 30 to slide outwards around the hinge points of the corresponding conical plates 32 and the inner wall of the exhaust funnel 1 in the corresponding sliding grooves A3 through the three connecting rods A29, and the three arc-shaped rods 30 simultaneously drive the three conical plates 32 to open radially. The magnitude of the opening of the three conical plates 32 depends on the magnitude of the interaction of the exhaust gas pressure in the three partial pressure pipes 6 with the three springs a12 in tension.

The larger the throttle is, the larger the exhaust pressure of the engine is, the larger the distance that the sliding plug 8 in the pressure dividing pipe 6 moves under the combined action of the exhaust pressure and the spring A12 is, the larger the opening amplitude of the three conical plates 32 is, and the larger the actual exhaust port of the exhaust barrel 1 is. The larger the actual exhaust port of the exhaust stack 1, the smaller the average exhaust pressure of the engine when a larger exhaust pressure passes through the exhaust stack 1 port.

The smaller the accelerator is, the smaller the exhaust pressure of the engine is, the smaller the distance of the sliding plug 8 in the pressure dividing pipe 6 moving under the combined action of the exhaust pressure and the spring A12 is, the smaller the opening amplitude of the three conical plates 32 is, the smaller the actual exhaust port of the exhaust funnel 1 is, and the average exhaust pressure of the smaller exhaust pressure of the engine passing through the port of the exhaust funnel 1 is increased.

Therefore, no matter the accelerator is stepped or small during driving, the exhaust pressure of the exhaust tail gas of the engine is balanced when the exhaust tail gas passes through the actual exhaust port of the exhaust funnel 1, when a vehicle passes through a road surface with high accumulated water or a low-lying place, the phenomenon that rainwater flows backwards into the exhaust funnel 1 due to the fact that the exhaust pressure of the exhaust funnel 1 is suddenly large and small caused by the fact that the weight of the accelerator is changed is avoided, the accumulated water in the exhaust funnel 1 is prevented from being corroded due to the fact that the accumulated water is not discharged in time, meanwhile, an oxygen sensor in the exhaust funnel 1 is protected from being damaged, the maintenance cost of the vehicle is reduced, and the water wading safety of the vehicle.

When the engine is started, the ring sleeve D26 drives the ring sleeve E36 to move synchronously through the three guide rods 33 and the limiting blocks 35 arranged on each guide rod 33, the ring sleeve E36 drives the cover plate 40 to swing around the central axis of the swing shaft 39 through the connecting rod B37 hinged with the ring sleeve E, the swing rod 38 hinged with the connecting rod B37 and the swing shaft 39, the opening of the exhaust cylinder 1 is opened, and the two springs B44 are further stretched. When the cover plate 40 just crosses the parallel state of the two springs B44, the two springs B44 in a further stretching state drive the cover plate 40 to be completely opened around the swing shaft 39 instantly, the swing angle of the cover plate 40 under the limitation of the two swing limiting blocks 47 is 90 degrees, the cover plate 40 drives the ring sleeve E36 to be close to but not in contact with the limiting block arranged at the tail end of the guide rod 33 instantly through the swing shaft 39, the swing rod 38 and the connecting rod B37, and meanwhile, the ring sleeve E36 is separated from the limiting ring 34 on the guide rod 33.

When the accelerator is reduced, the exhaust pressure of the engine is reduced, the exhaust pressure in the three pressure dividing pipes 6 is reduced, the three screws 11 respectively drive the two corresponding sliding plugs 8 to slide towards the initial positions in the corresponding pressure dividing pipes 6 under the reset action of the corresponding springs A12, the three screws 11 drive the three racks A22 to move towards the initial positions through the ring sleeves C19, the three racks A22 respectively drive the corresponding racks B24 to move towards the initial positions through the corresponding gears 23, the three racks B24 drive the three conical plates 32 to respectively swing back around the hinge points of the conical plates 32 and the inner wall of the exhaust pipe 1 through the ring sleeves D26 and the three arc-shaped rods 30, the swing back of the three conical plates 32 reduces the actual exhaust area of the opening of the exhaust pipe 1, so that the exhaust pressure of the exhaust pipe 1 is kept relatively unchanged, rainwater submerging the exhaust pipe 1 when a vehicle passes through a water accumulation road surface or a low-lying place cannot be sucked into the exhaust pipe 1 due to the change of the, the corrosion of the exhaust funnel 1 caused by the accumulated water not being discharged in time is avoided. During the change of the exhaust pressure of the exhaust funnel 1, the ring cover E36 does not interact with the stopper ring 34 and the stopper on the guide rod 33 because the cover plate 40 is in the fully opened state.

When the automobile engine is shut down, because the exhaust of the engine is finished, the pistons in the three pressure dividing pipes 6 are not under the action of the exhaust pressure of the engine any more, the three screws 11 are reset rapidly under the reset action of the corresponding springs A12 respectively, and the three screws 11 drive the corresponding two sliding plugs 8 and the ring sleeve C19 to reset rapidly respectively. The ring sleeve C19 drives the three conical plates 32 to rapidly swing back and reset through a series of transmission and form complete combination, so that the actual exhaust port of the exhaust funnel 1 is minimized. Meanwhile, the ring sleeve D26 drives the three guide rods 33 to reset, the limiting blocks on the guide rods 33 are quickly close to the ring sleeve E36, and the limiting rings 34 on the guide rods 33 are further far away from the ring sleeve E36. When the limiting blocks on the guide rods 33 meet the ring sleeve E36, the limiting blocks drive the ring sleeve E36 to reset, the ring sleeve E36 drives the cover plate 40 to swing back around the central axis of the swing shaft 39 through the connecting rod B37, the swing rod 38 and the swing shaft 39, and the two springs B44 are further stretched. When the cover plate 40 just crosses the parallel state with the two springs B44, the cover plate 40 is instantaneously reset and closes the exhaust funnel 1 under the resetting action of the two springs B44. The cover plate 40 drives the ring sleeve E36 to instantly contact with the limiting ring 34 on the guide rod 33 through the swing shaft 39, the swing rod 38 and the connecting rod B37, and the resetting is completed.

When the three springs a12 which are always in tension state may generate tension fatigue after the invention is used for a period of time, which results in insufficient pretensioning force of the three springs a12, the pretensioning amount of the three springs a12 needs to be increased and adjusted, and the adjustment process is as follows:

the nut B18 on each screw 11 is firstly loosened in turn, so that the nut B18 releases the locking state of the corresponding nut A13. Then, the nut a13 on each screw 11 is rotated in turn, so that the nut a13 moves towards the direction of the ring sleeve C19, the nut a13 drives the corresponding ring sleeve B16 to move axially synchronously through the sliding sleeve 14 and the ring sleeve a15, the ring sleeve B16 further stretches the corresponding spring a12, the tension of the spring a12 is increased, and the nut a13 stops rotating when the tension of the spring a12 meets the requirement. The nuts a13 on the three screws 11 are rotated for equal turns, so that the tension amplitudes of the three springs a12 are equal. The adjustment of the amount of pretension of the spring a12 is then achieved by tightening the nut B18 on each screw 11 in turn, so that the nut B18 locks the corresponding nut a13 again.

In conclusion, the beneficial effects of the invention are as follows: the invention keeps the balance of the exhaust pressure of the exhaust port of the exhaust funnel 1 by radially opening the three conical plates 32 which are uniformly hinged in the circumferential direction in the exhaust funnel 1 when the exhaust pressure of an automobile engine is larger and swinging back and closing the three conical plates when the exhaust pressure of the automobile engine is smaller, avoids that the road surface accumulated water which submerges the exhaust funnel 1 is sucked into the exhaust funnel 1 due to the larger fluctuation generated when the oil is added and reduced in the engine at the exhaust port of the exhaust funnel 1, avoids that the rainwater sucked into the exhaust funnel 1 corrodes the exhaust funnel 1 due to untimely discharge, prolongs the service life of the exhaust funnel 1 and ensures the exhaust efficiency of the exhaust funnel 1.

Meanwhile, the exhaust port of the exhaust funnel 1 is quickly opened by the cover plate 40 when the automobile is started, and the exhaust port of the exhaust funnel 1 is automatically closed by the cover plate 40 when the automobile engine stops running, so that the exhaust funnel 1 is prevented from being broken down due to the fact that insects, rats and ants enter the exhaust funnel 1 in the idle process of the automobile, and the normal use of the exhaust funnel 1 is guaranteed. And the closed cover plate 40 can also prevent rainwater from flooding the exhaust pipe and then entering the engine through the exhaust pipe to damage the engine in the idle process of the automobile.

Claims

1. An exhaust stack, characterized by: the exhaust pipe comprises an exhaust pipe, a silencer, pressure dividing pipes, a sliding plug, a screw rod, a spring A, a ring sleeve C, a limiting block A, a ring sleeve D, a connecting rod A, an arc-shaped rod, a conical plate, a guide rod, a ring sleeve E, a connecting rod B, a swing rod, a swing shaft, a cover plate and a spring B, wherein the three pressure dividing pipes communicated with one end of the exhaust pipe close to an engine are uniformly arranged on the exhaust pipe with the silencer in the circumferential direction, and are parallel to the exhaust pipe; two sliding plugs are matched in each pressure dividing pipe in a sliding mode, and hydraulic oil is sealed between the two sliding plugs; the ring sleeve C nested and sliding on the exhaust funnel is fixedly connected with a sliding plug which is far away from an engine in the three pressure dividing pipes through three screw rods which are uniformly distributed in the circumferential direction; each screw is nested with a spring A for resetting the ring sleeve C, and the screw is provided with a structure for adjusting the pretension of the spring A; three limiting blocks A matched with the ring sleeve C are uniformly arranged on the exhaust funnel in the circumferential direction;

three conical plates for adjusting the diameter of the exhaust port of the exhaust funnel according to the exhaust pressure of the engine are uniformly hinged on the inner wall of the exhaust funnel in the circumferential direction; an arc-shaped rod is fixedly arranged on each conical plate and slides in an arc-shaped sliding groove A on the exhaust funnel around the hinged point of the corresponding conical plate; the exposed end of each arc-shaped rod is hinged with a ring sleeve D which axially slides on the outer side of the exhaust funnel through a connecting rod A; the ring sleeve C is in transmission connection with the ring sleeve D, and the axial movement directions of the ring sleeve C and the ring sleeve D on the exhaust funnel are opposite;

a cover plate for opening and closing an exhaust port of the exhaust funnel is hinged at the exhaust port of the exhaust funnel through a pendulum shaft fixedly arranged on the cover plate, and two springs B for keeping the cover plate in an open or closed state are symmetrically arranged on the exhaust funnel; the ring sleeve E nested and sliding on the exhaust funnel is hinged with a swing rod fixedly arranged on a swing shaft through a connecting rod B; three guide rods which are uniformly arranged on the ring sleeve D in the circumferential direction are respectively in sliding fit with the three sliding grooves B on the ring sleeve E; each guide rod is provided with a structure for driving the ring sleeve E to reciprocate;

when the cover plate just crosses the parallel state of the cover plate and the two springs B, the two springs B in a further stretching state drive the cover plate to be completely opened around the swing shaft instantly, the swing angle of the cover plate under the limitation of the two swing limiting blocks is 90 degrees, the cover plate drives the ring sleeve E to be close to but not in contact with the limiting block arranged at the tail end of the guide rod instantly through the swing shaft, the swing rod and the connecting rod B, and meanwhile, the ring sleeve E is separated from the limiting ring on the guide rod.

2. The exhaust stack of claim 1, wherein: the guide rod is provided with a limiting ring and a limiting block B which drive the ring sleeve E to move; each screw is screwed with a nut A and a nut B for locking the nut A on the screw; a ring sleeve B is nested on the screw rod and is in rotary fit with a sliding sleeve fixedly connected with the nut A; one end of the spring A is connected with the ring sleeve B, and the other end of the spring A is connected with the tail end of the corresponding pressure dividing pipe; a ring sleeve A which is nested and fixedly arranged on the sliding sleeve rotates in a ring groove C on the inner wall of a ring sleeve B; three guide strips are uniformly arranged on the outer side of the exhaust funnel in the circumferential direction and are in sliding fit with the three guide grooves A on the inner wall of the ring sleeve C and the three guide grooves B on the inner wall of the ring sleeve D respectively.

3. The exhaust stack of claim 1, wherein: the pressure dividing pipe is fixed on the outer side of the exhaust pipe through a fixed seat; two annular grooves B which are distributed axially are formed in the outer cylindrical surface of the sliding plug, and a sealing ring B which is in sealing fit with the inner wall of the corresponding pressure dividing pipe is installed in each annular groove B; an annular groove A is formed in the inner wall of each sliding groove A, and a sealing ring A in sealing fit with the corresponding arc-shaped rod is mounted in each annular groove A.

4. The exhaust stack of claim 1, wherein: two L seats B are symmetrically arranged on the outer side of the exhaust port of the exhaust funnel, and a swing block B hinged to the tail end of each L seat B is connected with a swing block A hinged to the same side of the cover plate through a spring B on the same side; the spring B is an extension spring; the cover plate is hinged with two L seats A symmetrically arranged on the outer side of the exhaust funnel through a swing shaft; and the L seat A is provided with a swing limiting block for limiting the swing amplitude of the cover plate.

5. The exhaust stack of claim 1, wherein: the ring sleeve C is uniformly provided with three racks A parallel to the exhaust pipe in the circumferential direction, the ring sleeve D is uniformly provided with three racks B parallel to the exhaust pipe in the circumferential direction, and the racks A correspond to the racks B one by one; the rack A and the rack B which correspond to each other are simultaneously meshed with a gear arranged on the outer side of the exhaust pipe, and the moving directions of the rack A and the rack B are opposite; each gear is installed in a U-shaped seat, and the rack A and the rack B slide in the U-shaped seats.