Electric actuator for control valve of automobile exhaust system

Abstract

The invention discloses an electric actuator for a control valve of an automobile exhaust system. The electric actuator comprises a shell internally provided with a containing space, a motor arranged in the containing space and a gear set arranged in the containing space and connected with the motor; and the interior of the shell further comprises a PCB used for controlling the motor to automatically start and stop rotating, a driving shaft connected with the gear set and a torsional spring used for driving the gear set to rotate and reset, the driving shaft is arranged at the output end of the gear set, and the torsional spring is arranged on a rotating shaft of the gear set on the outer side of the driving shaft in a sleeving mode. According to the electric actuator for the control valve of the automobile exhaust system, the torsional spring connected with the gear set is arranged, a valve body in an initial state of the actuator is in an open state, therefore when the actuator is accidentally powered off or damaged, the gear set and the driving shaft can be driven to reset through resilience of the torsional spring, and it is ensured that a valve cover of the valve body can be driven to rotate to the initial position when the electric actuator is accidentally powered off or damaged, so that the automobile valve body is ensured to be in an opening and closing state, and normal use of an automobile exhaust system is ensured.

Description

technical field [0001] The invention relates to the technical field of actuators, in particular to an electric actuator for a control valve of an automobile exhaust system. Background technique [0002] The actuator is a commonly used control device in auto parts. It is a controller used to control the opening and closing state of the valve body in the exhaust system of the automobile engine. By connecting with the exhaust valve body of the automobile, the flow rate of the valve body can be controlled and adjusted to ensure Coolant flow in automotive battery pack cooling systems and gas flow in automotive engines. [0003] After the existing electric actuator is generally connected to the valve body, the exhaust pipe passing through the valve body is in a closed state. Therefore, the opening and closing of the valve body can be realized only by controlling the opening and closing degree of the valve body through the controller. However, when the actuator is accidentally pow...

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Problems solved by technology

[0003] After the existing electric actuator is generally connected to the valve body, the exhaust pipe passing through the valve body is in a closed state. Therefore, the opening and closing of the valve body can be realized only by controlling the opening and closing degree of the valve body through the controller. However, when the actuator is accidentally powered off or damaged during use, the internal gear set will be stuck in this state, and the control valve connected to the actuator will not be able to adjust the flow rate, which cannot ensure that the automobile engine When the exhaust system continues to work, the valve body has sufficient exhaust flow for gas discharge, which may easily cause the phenomenon that the gas cannot be fully discharged and affect the normal use of the automobile exhaust system

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