A screw assembly for automobile tail throat

Abstract

The invention discloses a screw rod assembly for an automobile tail throat. The screw rod assembly comprises a direct current motor, a plurality of blade supports, an upper thread ring, a steel wire ring, a plurality of connecting sheets, a lower thread ring, a screw rod and a plurality of blades. The direct current motor and the blade supports are all mounted on the automobile tail throat. The screw rod is mounted on a rotating shaft of the direct current motor. One ends of the connecting sheets are connected in series through the steel wire ring. The steel wire ring and the connecting sheets are mounted between the upper thread ring and the lower thread ring to form a whole which is mounted on the screw rod. The blades are movably connected with the blade supports and the other ends of the connecting sheets. The screw rod assembly has the beneficial effects that in the running process of an automobile, when the rotating speed of an engine is increased, the gas displacement is also increased, and at the moment, the blades are opened so that it can be ensured that waste gas is smoothly exhausted; when the rotating speed of the engine is low, the gas displacement is small, the blades are closed, the exhaust return pressure is increased, and torque loss is avoided; and the structure is simple, operation, assembling and disassembling are convenient, and later maintenance is facilitated.

Description

technical field [0001] The invention relates to the related technical field of automobile exhaust pipes, in particular to a screw assembly for automobile exhaust pipes. Background technique [0002] Tail throat is also called automobile tail throat, which is a component installed on the original exhaust tail. The tailpipe of the car muffler is used to decorate the tailpipe of the exhaust pipe. In addition to preventing the deformation of the tailpipe of the car, it also plays the role of supercharging and turbulence. It can also make the sound of the exhaust pipe slightly soft and pleasant to a certain extent, reducing noise. But the reason why many car owners buy it is because it has a strong decorative effect. [0003] Depending on the type of tail throat, there are several actual functions: 1. There are special tail throats for fire safety, such as those used on tank trucks and some special vehicles; 2. Purely aesthetic, there are many chrome-plated ones. The tail thro...

AI Technical Summary

Problems solved by technology

[0004] The tail throat of the car is installed on the exhaust pipe at the rear of the car. The existing tail throat of the car is fixed. Therefore, when the engine speed increases during the driving process of the car, the exhaust volume also increases, which is not conducive to exhaust gas. exhaust; when the car engine speed is low, the exhaust volume is small, and the exhaust back pressure cannot be changed, resulting in loss of torque

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