Electric door roller

Abstract

The invention discloses an electric door roller. The electric door roller comprises a ratchet wheel, an iron core and a shell. The ratchet wheel comprises a first ratchet wheel body, a second ratchet wheel body and an intermediate clamping wheel, the first ratchet wheel body and the second ratchet wheel body are formed by metal plates, the iron core comprises an outer sleeve, an inner sleeve and a gland, the shell comprises a barrel and a chain penetrating plate, and the barrel is formed by stamping and welding a metal plate. The electric door roller is reasonable in structure, can overcome the defects that existing ratchet wheels are poor in magnetoconductivity and large in magnetic loss, and larger electromagnetic force is needed for attraction, solves the problem that gray cast iron is selected and used as an electromagnetic iron core and consequently energy consumption and material consumption are caused, and can also solve the problems that an existing electric door roller shell is likely to crack during fastening, is impacted and damaged in the transportation process and is high in noise when matched with a hand-pulling chain during work.

Description

technical field [0001] The invention relates to the technical field of electric rolling door machines, in particular to an electric rolling door machine. Background technique [0002] The current electric rolling door machine generally includes a ratchet, an iron core and a shell, of which: [0003] The ratchet used is made of gray cast iron, which plays three roles in the roller shutter motor: armature, brake and manual lifting of the roller blind. When used as an armature, its weight and magnetic permeability are very important. The magnetic permeability is poor, the magnetic loss is also large, and because of the structural characteristics, the weight is relatively heavy, so the electromagnet core needs a large electromagnetic force to attract it, and the electromagnetic power is correspondingly increased, and the heat is fast. It is not conducive to working for a long time. When the gray cast iron is formed into a finished product during the casting process, it is easy ...

AI Technical Summary

Problems solved by technology

[0006] The invention provides an electric rolling door machine, which overcomes the deficiencies of the above-mentioned prior art. It can solve the defects of the existing ratchet wheel, such as poor magnetic permeability, large magnetic consumption, and large electromagnetic force. The solution is to use gray cast iron As the problem of energy consumption and consumables caused by the electromagnet core, it can also solve the problem that the existing electric rolling door machine shell is easy to crack when it is fastened, the collision will be damaged during transportation, and the problem of high noise when working with the hand chain

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