Ceramic fixing ring and commutator adopting same

Abstract

This invention discloses ceramics fixing ring and commutator using it. The commutator includes several commutator segments, and several insulating pieces and insulating packed layer. Each segment at least includes a main disc, at least one fixed connecting disc and one connecting part, every two adjacent main discs are isolated through at least one insulating disc, at least one accept slot is set between the main disc and the fixed connecting disc. Closed ring is formed by several commutator segments and insulating discs, accept ring slot is formed by each slot. The ceramic fixed ring is accepted in the accept ring slot, insulating packed bed is packed coated on the ring slot, fixed connecting disc, connecting part, and part distal wall and proximal wall of the main disc, each two adjacent fixed connecting discs and connecting part is insulated by insulating packed layer.

Description

technical field [0001] The invention relates to a ceramic product and a motor product using the ceramic product, in particular to a ceramic fixing ring and a commutator using the ceramic fixing ring. Background technique [0002] Commutators are used in DC motors (such as motors used in video recorders, tape recorders, automation control, etc.) and some series motors (such as motors used in electric drills, vacuum cleaners, etc.). Generally, the commutator consists of a plurality of copper commutator segments that are insulated from each other and is fastened into a closed ring cylinder through insulating bonding materials. When the commutator rotates at high speed, it is ensured that each commutator segment will not move relative to the closed ring cylinder or even fly out under the action of centrifugal force. When rotating at high temperature or high speed, the commutator segments that are fastened together only by insulating bonding materials are prone to looseness, whi...

AI Technical Summary

Problems solved by technology

However, this kind of reinforced commutator requires riveting the feet of the commutator first, which increases the manufacturing process and manufacturing cost; and when installing the fastening ring, it is necessary to overcome the resistance of the riveted feet. Convenient; in addition, the reinforcing ring of this reinforced commutator can be made of glass fiber, but the pulling force of glass fiber is limited (generally below 150MPa), and the pulling force of the fastening ring made of glass fiber is less than that of the motor during high-speed operation. The centrifugal force of the copper electrode causes deformation, which causes the copper electrode to displace and the surface to appear uneven. In the process of contact with the brush, it is easy to generate sparks and cause breakdown of the insulating material, reducing the service life of the motor; moreover, the glass fiber contains The fine filaments are easy to insert into the human muscle during the manufacture and installation of the reinforcement ring, and cannot be decomposed, causing permanent damage, even if attached to the skin, it can cause skin itching and allergies

In addition, the reinforcement ring made of glass fiber is easy to generate fiber dust when it rotates at high speed, which will cause great harm once it is inhaled by the human body.

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