What is the manufacturing method for the starter armature structure?

　　 Starter armature The structure can increase the energization time of the starter and avoid the problem of short circuit caused by the ablation of the copper wire winding after the armature is energized for a long time, thus ensuring the safety of the circuit. The starter armature structure includes an armature shaft, an armature winding, an iron core and a commutator. The armature winding includes an end winding i arranged away from the commutator. The end winding i is provided with a U-shaped portion, and the U-shaped portion is provided with an insulating sleeve. The melting point of the insulating sleeve is higher than 200 ℃. The iron core is fitted on the armature shaft, and the iron core is provided with a winding slot i, and the armature winding is embedded in the winding slot i. The insulating piece i is set in the winding slot i to isolate the armature winding from the iron core and the edge of the armature winding components. The insulating piece i has an S-shape structure to wrap the edge of the armature winding components. The commutator is fitted on the armature shaft and is arranged near the end of the armature shaft. The commutator is provided with a winding slot ii. The armature winding also includes an end winding ii, which is arranged near the commutator and embedded in the winding slot ii. The end winding ii is composed of an inner ring layer and an outer ring layer, and the insulating element ii is arranged between the inner ring layer and the outer ring layer to isolate the inner ring layer and the outer ring layer. The tightening ring is also fitted at the position corresponding to the winding slot ii on the commutator. The insulating sleeve is made of glass fiber.

　　Compared with the existing technology, the embodiments of the present invention have at least the following effects:

　　1. The insulating sleeve is fitted on the U-shaped portion of the end winding i of the starter motor armature structure. The insulating sleeve is high-temperature resistant. The insulating sleeve can isolate the end windings i from each other to avoid short circuits caused by the ablation of the copper wires of the end windings i after the starter armature is energized for a long time, which increases the energization time of the starter armature and thus meets the strict requirements of diesel vehicle manufacturers for long-time energization of the starter.

　　2. The winding slot i on the iron core is provided with an insulating piece i, which is S-shaped and can wrap and isolate the edge of the armature winding components, further avoiding the short circuit of the copper wire of the armature winding due to long-term ablation.

　　3. The end winding ii is composed of an inner ring layer and an outer ring layer. The insulating part ii is arranged between the inner ring layer and the outer ring layer. The insulating part ii isolates the inner ring layer and the outer ring layer, which can prevent the short circuit of the copper wire of the end winding ii due to long-term ablation.