CN209925072U - Automobile exhaust pipe assembly - Google Patents

Abstract

An automobile exhaust pipe assembly includes an exhaust pipe tail throat, a sliding seat sleeved on the exhaust pipe tail throat, a plurality of converging sheets, and a sliding seat for driving the sliding seat to slide along the extension direction of the exhaust pipe tail throat The drive unit, the plurality of converging pieces are arranged in a circular array around the central axis of the exhaust pipe tail throat, and the inner end of the converging pieces is hinged on the sliding seat, and the outer end extends to the outside of the outer end of the exhaust pipe tail throat, each An elastic member for pulling the converging sheet toward the center of the tail throat of the exhaust pipe is arranged between a converging sheet and the sliding seat. When the sliding seat slides toward the inner side of the tail throat of the exhaust pipe, the constricting sheet is pushed to the outside to open the plurality of constricting sheets. The size of the orifice of the tail throat of the exhaust pipe of the utility model is variable, and the inner diameter of the exhaust port of the vehicle can be adjusted correspondingly according to the driving and working state of the vehicle.

Description

car exhaust pipe assembly

technical field

The utility model relates to the technical field of vehicles, in particular to an automobile exhaust pipe assembly.

Background technique

At present, with the continuous improvement of people's living standards, vehicles are not only used as means of transportation. Many vehicles control the exhaust back pressure to improve the noise generated during vehicle startup and driving to meet people's individual needs. At present, all vehicles use a muffler at the tail throat of the exhaust pipe to increase the flow rate of the exhaust gas in the pipeline with a smaller cross-section. After the cross-section becomes smaller, the resistance of the exhaust gas flow will increase, thereby increasing the back pressure. This in turn improves the noise. However, in the existing structure, the inner diameter of the nozzle at the end of the tail throat of the exhaust pipe is always the same, and because the engine has different working states when the vehicle is in different states (such as starting, high-speed driving), the end of the tail throat is simply reduced. Although the pipe diameter can achieve the purpose of improving the noise, at the same time, the performance of the vehicle is also affected because the exhaust emission is not timely enough.

Utility model content

In view of the deficiencies of the prior art, the purpose of the present invention is to provide an automobile exhaust pipe assembly, the size of the orifice of the exhaust pipe tail throat is variable, so as to ensure that the noise of the vehicle is improved without affecting the vehicle. performance.

To achieve the above object, the utility model adopts the following technical solutions:

An automobile exhaust pipe assembly includes an exhaust pipe tail throat, a sliding seat sleeved on the exhaust pipe tail throat, a plurality of converging sheets, and a sliding seat for driving the sliding seat to slide along the extension direction of the exhaust pipe tail throat The drive unit, the plurality of converging pieces are arranged in a circular array around the central axis of the exhaust pipe tail throat, and the inner end of the converging pieces is hinged on the sliding seat, and the outer end extends to the outside of the outer end of the exhaust pipe tail throat, each An elastic member for pulling the converging sheet toward the center of the tail throat of the exhaust pipe is arranged between a converging sheet and the sliding seat. When the sliding seat slides toward the inner side of the tail throat of the exhaust pipe, the constricting sheet is pushed to the outside to open the plurality of constricting sheets.

The elastic part is a tension spring whose one end is hung on the sliding seat and the other end is hung on the converging sheet.

The drive unit includes two linear motors located on both sides of the tail throat of the exhaust pipe. A fixed plate is arranged on the tail throat of the exhaust pipe. The body of the linear motor is fixed on the fixed plate, and the telescopic rod of the linear motor is fixedly connected to the sliding seat. superior.

A guide rod is also fixed on the sliding seat, the extension direction of the guide rod is consistent with the extension direction of the linear motor telescopic rod, and the guide rod is slidably connected to the fixing plate.

The top pressure part is a flange arranged on the outer end of the tail throat of the exhaust pipe.

The beneficial effects of the present utility model are:

Compared with the prior art, the size of the orifice of the exhaust pipe tail throat of the utility model is variable, and the inner diameter of the exhaust port of the vehicle can be adjusted correspondingly according to the driving and working state of the vehicle, so as to improve the noise when necessary. When the caliber of the tail throat of the exhaust pipe can be reduced, when the vehicle performance needs to be improved, the caliber of the tail throat of the exhaust pipe can be increased.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the installation schematic diagram of the utility model;

Fig. 3 is the sectional view of the utility model;

FIG. 4 is a schematic diagram of a working state of the utility model.

Detailed ways

Below, in conjunction with the accompanying drawings and specific embodiments, the present utility model is further described:

As shown in FIGS. 1 , 2 and 3 , it is an automobile exhaust pipe assembly of the present invention, which includes an exhaust pipe tail throat 10 , a sliding seat 20 , a plurality of converging pieces 30 and two linear motors 40 , wherein, The sliding seat 20 is annular, and is sleeved on the outside of the exhaust pipe tail throat 10 and slidably matched with the exhaust pipe tail throat 10 , that is to say, the sliding seat 20 has an extension direction along the exhaust pipe tail throat 10 . The freedom of movement, the two linear motors 40 are respectively arranged on both sides of the exhaust pipe tail throat 10, which are used as driving units to drive the sliding seat 20 to reciprocate in the extension direction of the exhaust pipe tail throat 10, and the Movement is controllable by the vehicle control system. A plurality of converging pieces 30 are distributed in a circular array around the central axis of the exhaust pipe tail throat 10, and the inner end of the converging pieces 30 is hinged on the sliding seat 20. The inner end of 30 is pivotally connected to the axle seat 21, and the outer end of the converging piece 30 extends to the outside of the outer end of the exhaust pipe tail throat 10; There is a tension spring 31, the two ends of the tension spring 31 are respectively hooked on the hooks of the converging sheet 30 and the sliding seat 20, and the elastic tension provided by the tension spring 31 always pulls the converging sheet 30 toward the direction close to the exhaust pipe tail throat 10. tightly, so that the plurality of constricting sheets 30 are in a closed state; the outer end of the exhaust pipe tail throat 10 forms a pressing portion, and the pressing portion is used to push the converging sheets 30 to the outside, that is, when the sliding seat 20 faces the When the inner side of the exhaust pipe tail throat 10 slides, the pressing portion contacts the inner surface of the converging piece 30, and as the sliding seat 20 continues to slide, the converging piece 30 is continuously pushed by the pressing portion, so that the converging piece 30 moves away from The direction of the exhaust pipe tail throat 10 is swung, and then the plurality of converging pieces 30 are opened. Referring to FIG. 1 , when the linear motor 40 drives the carriage 20 to move to the outer position, the plurality of converging sheets 30 are completely closed, and the inner diameter of the closed nozzle enclosed by the converging sheets 30 is relatively small, which is smaller than the exhaust pipe tail throat 10 At this time, the inner diameter of the vehicle exhaust port is relatively small; referring to FIG. 4 , when the linear motor 40 drives the sliding seat 20 to move to the inner position, the plurality of converging pieces 30 are in an open state. The trachea tail throat 10 is not blocked by the converging sheet 30, and the inner diameter of the exhaust port of the vehicle is relatively large.

Compared with the prior art, the size of the orifice of the exhaust pipe tail throat of the utility model is variable, and the inner diameter of the exhaust port of the vehicle can be adjusted correspondingly according to the driving and working state of the vehicle, so as to improve the noise when necessary. When the caliber of the tail throat of the exhaust pipe can be reduced, when the vehicle performance needs to be improved, the caliber of the tail throat of the exhaust pipe can be enlarged.

It should be noted here that the above-mentioned tension spring 31 of the present invention is used as an elastic component, which is used to keep the converging piece 30 always swinging toward the center of the exhaust pipe tail throat 10. Of course, in order to achieve this purpose, it can also be Use other elastic mechanisms to replace the above-mentioned tension spring 31; in addition, the linear motor 40 as the driving unit can also be replaced by other driving units, for example, a common motor can be used with a screw drive mechanism to realize sliding Linear reciprocating motion of the seat 20.

In other embodiments, a fixed plate 11 is also fixed outside the tail throat 10 of the exhaust pipe, the body part of the linear motor 40 is fixed on the fixed plate 11, and the telescopic rod passes through the fixed plate 11 and is fixedly connected to the sliding seat 20, In this way, the fixed plate 11 is used as the installation base of the linear motor 40 to ensure that the sliding seat 20 can slide smoothly; at the same time, in order to make the movement of the sliding seat 20 more stable, a guide rod can be fixed on the sliding seat 20. The extension direction is consistent with the extension direction of the telescopic rod of the linear motor 40 , and the guide rod is slidably connected to the fixed plate 11 .

In order to ensure that the constricting piece 30 can swing outward as much as possible when the sliding seat 20 is moved inward, the above-mentioned pressing portion is a flange 32 disposed on the outer end of the exhaust pipe tail throat 10 .

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be used for the foregoing implementations. The technical solutions described in the examples are modified, or some technical features thereof are equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (5)

1. The automobile exhaust pipe assembly is characterized by comprising an exhaust pipe tail throat, a sliding seat, a plurality of convergence pieces and a driving unit, wherein the sliding seat is sleeved on the exhaust pipe tail throat in a sliding mode, the driving unit is used for driving the sliding seat to slide along the extending direction of the exhaust pipe tail throat, the convergence pieces are circumferentially arrayed around the central axis of the exhaust pipe tail throat, the inner side ends of the convergence pieces are hinged to the sliding seat, the outer side ends of the convergence pieces extend to the outer side of the outer side end of the exhaust pipe tail throat, an elastic component used for pulling the convergence pieces towards the center close to the exhaust pipe tail throat is arranged between each convergence piece and the sliding seat, a jacking portion is formed at the outer side end of the exhaust pipe tail throat, and the jacking portion is used for jacking the convergence pieces towards the outer side to enable the convergence pieces to be opened when the sliding seat slides towards the inner.

2. The vehicle exhaust pipe assembly as recited in claim 1, wherein the resilient member is a tension spring having one end thereof engaged with the slide and the other end thereof engaged with the convergence plate.

3. The exhaust pipe assembly of claim 1, wherein the driving unit comprises two linear motors respectively disposed at both sides of the throat of the exhaust pipe, a fixing plate is disposed on the throat of the exhaust pipe, a body of the linear motor is fixed to the fixing plate, and a telescopic rod of the linear motor is fixedly coupled to the sliding base.

4. The exhaust pipe assembly according to claim 3, wherein the slide base further has a guide bar fixed thereto, the guide bar extending in a direction corresponding to the extension direction of the extension bar of the linear motor, and the guide bar is slidably inserted into the fixed plate.

5. The automotive exhaust pipe assembly as recited in claim 1 in which the hold-down is a flange disposed at the outboard end of the exhaust pipe throat.

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