Overload protector of tubular motor

Abstract

A tubular motor overload protector, which is composed of an inner tooth sleeve seat formed by two or more spline grooves on the inner wall periphery of the upper end of the three-stage planetary support and a steel ball seat, and the steel ball seat has two or more There are more than two through holes matching the spline grooves, and springs and steel balls are installed in the through holes, and the steel ball seat is connected with the output shaft of the three-stage planet carrier. This protector has a simple and compact structure, is easy to process and manufacture, and has a small installation volume. It makes full use of the three-stage planetary support in the original planetary gear box without changing the structure and volume of the original tubular motor. It can be widely used in existing Installed and used in tubular motors, when the tubular motor is overloaded for various reasons, the steel ball seat will slip and will not rotate together with the three-stage planetary support, so that the output shaft will also stop rotating, and the overload torque will not be transmitted to the motor, thus protecting the motor and The external supporting devices connected with it are not damaged.

Description

technical field [0001] The invention relates to a protector, especially when the tubular motor is working under overload conditions, it can not only ensure the various components inside the tubular motor, but also prevent the external and matching components from being damaged and the tubular motor used for overloading protector. Background technique [0002] With the rapid development of the economy and the advancement of science and technology, it has also driven various industries to move towards modernization and automation. Tubular motors are now not only widely used in rolling shutter doors, windows, awnings, large garages, and shops, but also gradually used in large motors. It is used as the power of electric curtains in passenger cars, cruise ships, transportation industries or offices and ordinary households, but there is no overload protector in the tubular motors currently used, so when the tubular motors are installed, if the motor stroke is not set properly, or ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the economy and the advancement of science and technology, it has also driven various industries to move towards modernization and automation. Tubular motors are now not only widely used in rolling shutter doors, windows, awnings, large garages, and shops, but also gradually used in large motors. It is used as the power of electric curtains in passenger cars, cruise ships, transportation industries or offices and ordinary households, but there is no overload protector in the tubular motors currently used, so when the tubular motors are installed, if the motor stroke is not set properly, or the curtains are in the In the process of rewinding, if it is accidentally hooked, it will cause a stall phenomenon, and it will not rotate, but at this time the motor is still energized and rotates to overcome greater resistance. For example, once the DC motor is blocked, the current flowing through it will Doubling, the output torque of the motor will also double, so it is very easy to cause the stalled motor to be overloaded and burnt. At the same time, it will tear the curtain or break the shaft, which will bring great losses to the user and is unsafe to use.

[0003] Patent No. CN01203055.4 "Motor drive device for electric curtains" also provides a measure to prevent the motor from being burned due to overload, but its structure is complex and costly, and many electronic circuits are used, including the drive circuit for driving the motor, The controller, the current limiting circuit, and the overload detection circuit that control the motor stop, forward and reverse rotation, stop the motor by detecting the output current of the current limiting circuit, and prevent the motor from burning due to overload

[0004] Patent No. CN99255485.3 "An Overload Tripping Device for an Automatic Curtain Brake", which is to install two coaxial front and rear magnetic counter-suction wheels between the linkage shafts of the gear set inside the brake, and the counter-suction wheels Gears are installed on the outer end of the wheel, the gear on the front magnetic pair of suction wheels meshes with the output gear of the motor, the gear on the rear magnetic pair of suction wheels meshes with the output gear of the moving reel, and the power of the motor is transmitted to the When the moving reel rolls the curtain, when it is overloaded due to various reasons, the two pairs of suction wheels will rotate relative to each other, so that the load of the moving reel cannot be transmitted to the motor, thereby protecting the motor. Large, through the control circuit comparison control to cut off the power supply of the motor, it also protects the motor, but this device uses both a mechanical protection structure and an electronic circuit control, the structure is complex, and the manufacturing cost is high

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