Motor assembly with accurate return to home position switch

Abstract

The invention relates to a motor assembly with a switch capable of accurately returning to an initial position, belongs to the technical field of motor rotation control, and in particular relates to a technology for a switch to accurately return to the initial position in the rotation range of 360 degrees. The motor assembly comprises a direct-current gear motor, a shell and a turntable, wherein the turntable is fixedly connected with an output shaft of the direct-current gear motor; the turntable is positioned in the shell; the shell is fixedly connected with the casing of the direct-current gear motor; an electric contact column is arranged on each of the shell and the turntable between the shell and the turntable, and when the turntable turns to a certain position, the electric contact column of the shell can contact with the electric contact column of the turntable to conduct electricity; and wire holes are formed in the shell. The motor assembly has the advantages that the direct-current gear motor can accurately return to the initial position in the rotation range of 360 degrees, and feedback control can be performed on the returning to the initial position to ensure that the direct-current gear motor can accurately return to a standard initial position for standby or preparation for starting next time, and the initial position does not need to be determined or corrected before the motor is started.

Description

technical field [0001] The invention belongs to the technical field of motor rotation control, in particular to the technology that the motor can accurately return to the initial position within 360 degrees of rotation. Background technique [0002] In his authorized patent 20051001077.X "throttle system device with annunciator", the applicant provides a device that determines whether to remedy the brake after judging whether the throttle action is correct or wrong, so that the throttle can be The utility model relates to a dual-purpose motor vehicle gas pedal system which can be used for braking and accelerating. It is characterized in that an annunciator is arranged on any one of the accelerator pedal, the linkage device, and the accelerator pedal corresponding to the vehicle body parts. The annunciator is connected with the electric valve that can cut off the oil circuit of the engine and the electric valve that starts the brake. This technology proposes to use electron...

AI Technical Summary

Problems solved by technology

The first disadvantage of this technology is that in the continuously changing pressure signal felt by the annunciator, when the signal acquisition device for judging and taking out the false accelerator pedal signal is faulty, it may make an error in the judgment of the false accelerator pedal signal, resulting in the failure of the system. poor reliability

The second disadvantage of this technology is to use the signal output line to control the electric valve, and use the electric valve to shut off the engine oil supply pipe, ignition circuit, motor power supply, etc. of the vehicle, so that the driver has a long time to step on the accelerator by mistake until the vehicle is stopped. The wrong trip is far away, and this slow response is not conducive to preventing car accidents from happening

The third disadvantage of this technology is to use the signal output line to control the electric valve, and use the electric valve to cut off the engine oil supply pipe, ignition circuit, motor power supply, etc. of the vehicle, so that the engine will stop rotating and work completely, causing the brake system and steering of the car to be damaged. system, anti-skid and other safety systems have all stopped working, so shutting off the engine of the vehicle with a false accelerator pedal signal is not conducive to performing error-correcting emergency braking when there is a false accelerator pedal

[0003] In his patent application 201110030092.4 "A Device for Automatically Correcting Misstepped Accelerators to Brakes with the Coordination of Electric Appliances and Machinery", the applicant disclosed a device including sensors and signal analyzers And the device of the brake starting mechanism, its disadvantages are that there are many microelectronic devices to obtain the signal of the accelerator pedal by mistake, and the reliability is reduced; the disadvantage is that in the brake starting mechanism, the circular motion of the motor is changed For reciprocating motion, the straight rack is used to change the motion mode, because to ensure the reciprocating motion of the straight rack positioning, it is necessary to have a frame that fixes the relative position of the motor and the straight rack. This frame is bulky and it is difficult to find a suitable position. installation, and complex structure, high cost and poor reliability

Microelectronic circuits are prone to signal drift and poor reliability

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