CN103437873B - A kind of automobile exhaust system valve based on constant force mechanisms - Google Patents

Abstract

The invention relates to an automobile exhaust system valve, in particular to an automobile exhaust system valve based on a constant force mechanism. It includes an exhaust pipe, a valve plate, a handle, a steel wool bush and a constant force mechanism. The constant force mechanism is composed of a chassis, a rotating shaft, a key, a variable diameter cone wheel, a positioning pin, a scroll spring, a retaining ring and a housing. One end of the handle crosses the exhaust pipe, the valve plate is placed in the exhaust pipe and welded on the handle, a steel wool bushing is installed between the handle and the exhaust pipe, and the other end of the handle is connected to the constant force mechanism through a steel wire rope. The mechanism is connected to the exhaust pipe by threads. The valve of the automobile exhaust system based on the constant force mechanism of the present invention can close the valve at low speed and solve the low-frequency noise problem; while at high speed, the pressure of the exhaust gas increases and the valve opens to make the exhaust more smooth. To ensure the high-speed performance of the car, and to ensure that only a fixed pressure is required to keep the valve open.

Description

A Valve of Automobile Exhaust System Based on Constant Force Mechanism

technical field

The utility model relates to an automobile exhaust system valve, in particular to an automobile exhaust system valve based on a constant force mechanism.

Background technique

One of the main functions of the automobile exhaust system is to solve the noise problem of the automobile engine, especially the low-frequency noise problem at low speed. The application of the acoustic valve can well solve the low-frequency noise problem at low speed, but the traditional spring control valve, At high speed, the reaction force to the exhaust system will also increase, and the back pressure of the exhaust system will increase, which wastes the power of the engine and increases fuel consumption; therefore, a new device is needed to solve the noise problem at low speed and at the same time It is also possible not to increase the back pressure at high rotational speeds.

Contents of the invention

The purpose of this utility model is to provide a valve that remains closed under low speed conditions to solve the low-frequency noise problem under low speed conditions; under high speed conditions, the valve is opened to make the exhaust condition smoother and ensure the high-speed performance of the car. A valve based on the automotive exhaust system that ensures that only a fixed pressure is required to keep the valve open.

The purpose of this utility model is achieved in this way: a kind of automobile exhaust system valve based on a constant force mechanism is characterized in that it comprises: an exhaust pipe, on the exhaust pipe, there is a Two coaxial holes, and a boss is welded on the outer diameter surface of the exhaust pipe, and threads are processed on the boss;

Valve;

The handle is Z-shaped;

Steel wool lining;

Constant force mechanism.

The pulling force output by the exhaust system valve using the constant force mechanism remains unchanged, ensuring that the pressure of the exhaust gas on the valve plate remains unchanged when the valve is opened, thereby ensuring that the back pressure of the exhaust system remains unchanged when the valve is opened.

The coaxial hole of the exhaust pipe adopts a process of pre-drilling and then expanding the hole with a hot-melt drill.

The constant force mechanism is used in conjunction with a scroll spring and a variable-diameter tower wheel, so that the output tension of the constant force mechanism remains unchanged.

The valve of the automobile exhaust system based on the constant force mechanism of the utility model is closed under the action of the pulling force exerted by the constant force mechanism when the vehicle is at low speed, and the effective pipe diameter of the exhaust pipe is reduced, so that the exhaust system maintains a certain discharge pressure. Gas back pressure to ensure the low-speed performance of the car; while in high-speed conditions, the exhaust gas emitted by the engine increases, and the exhaust gas pressure increases. The larger the pipe diameter, the smoother the exhaust condition, thereby ensuring the high-speed performance of the car; and because the pulling force exerted by the constant force mechanism is constant, only a fixed exhaust pressure is needed to keep the valve open.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the automobile exhaust system valve based on the constant force mechanism of the present invention;

Fig. 2 is the overall structure schematic diagram of constant force mechanism;

detailed description

Referring to Fig. 1, Fig. 2, the automobile exhaust system valve of the present utility model comprises exhaust pipe 1, valve plate 2, handle 3, steel wool bushing 4 and constant force mechanism 5, and constant force mechanism 5 is formed by chassis 5a, rotating shaft 5b, reducing cone wheel 5c, scroll spring 5d, key 5e, steel wire rope 5f, circlip 5g, first positioning pin 5h, second positioning pin 5i and housing 5j; wherein one end of the handle 3 crosses the exhaust pipe 1. The valve plate 2 is placed in the exhaust pipe 1 and welded on the handle 3. A steel wool bushing 4 is installed between the handle 3 and the exhaust pipe 1. The other end of the handle 4 is connected to the constant force mechanism 5 through a steel wire rope 5f. The constant force mechanism 5 is connected to the exhaust pipe 1 through threads; the rotating shaft 5b of the constant force mechanism 5 is installed concentrically with the chassis 5a, the variable diameter cone wheel 5c is fixed to the circumferential direction of the rotating shaft 5b through the key 5e, and is axially connected to the rotating shaft 5b through the circlip 5g. Fixed, the inner end of the scroll spring 5d is installed on the rotating shaft 5b through the first positioning pin 5h, and the outer end is installed on the chassis 5a through the second positioning pin 5i. 5f, the end of the wire rope 5f is placed on the handle 3, and the constant force mechanism 5 has a housing 5j outside.

Working principle of the present utility model is described as follows in conjunction with Fig. 1, Fig. 2:

In the low-speed condition of the vehicle, the valve is closed under the pulling force exerted by the constant force mechanism 5, and the effective pipe diameter of the exhaust pipe 1 is reduced, so that the exhaust system maintains a certain exhaust back pressure to ensure the low-speed performance of the vehicle; while at high speed Under normal conditions, the exhaust gas discharged by the engine increases, and the exhaust gas pressure increases. When the pressure is greater than the pulling force exerted by the constant force mechanism 5, the valve plate 2 is pushed open, the valve opens, the effective diameter of the exhaust pipe 1 increases, and the exhaust condition becomes smoother. , thereby ensuring the high-speed performance of the automobile; and since the pulling force exerted by the constant force mechanism 5 is constant, only a fixed exhaust pressure is required to keep the valve in an open state.

Claims (1)

1. the automobile exhaust system valve based on constant force mechanisms, it is characterized in that: described automobile exhaust system valve is made up of exhaustor (1), valve block (2), handle (3), steel wool lining (4) and constant force mechanisms (5), constant force mechanisms (5) is made up of chassis (5a), rotating shaft (5b), reducing cone pulley (5c), scroll spring (5d), key (5e), steel wire rope (5f), jump ring (5g), the first alignment pin (5h), the second alignment pin (5i) and housing (5j)；Wherein handle (3) one end passes across exhaustor (1), valve block (2) is placed in exhaustor (1) and is welded on handle (3), steel wool lining (4) is installed between handle (3) and exhaustor (1), handle (3) other end is connected on constant force mechanisms (5) by steel wire rope (5f), and constant force mechanisms (5) is connected with exhaustor (1) by screw thread；The rotating shaft (5b) of constant force mechanisms (5) is concentric with chassis (5a) installs, reducing cone pulley (5c) is fixed by key (5e) and rotating shaft (5b) circumferencial direction, by jump ring (5g) and rotating shaft (5b) axial restraint, scroll spring (5d) is inner to be arranged in rotating shaft (5b) by the first alignment pin (5h), outer end is arranged on chassis (5a) by the second alignment pin (5i), reducing cone pulley (5c) has helicla flute, Wound steel rope (5f) in groove, steel wire rope (5f) end is enclosed within handle (3), constant force mechanisms (5) is outside housing (5j)；Described exhaustor (1) is perpendicular to axis and does not have two coaxial apertures with on the position of axes intersect, described steel wool lining (4) is arranged in two coaxial apertures, and described handle (3) is arranged in steel wool lining (4)；Welding a boss in described exhaustor (1) outer diameter face, boss processes screw thread, constant force mechanisms (5) is connected with exhaustor (1) by screw thread；Described handle (3) is in zigzag.