Stator coil tightening device and coil tightening method for motor

Abstract

The invention provides a stator coil tightening device and coil tightening method for a motor. The tightening device comprises a guide disc, a driving rotary disc and a pushing mechanism; the inner ring of the upper surface of the guide disc is provided with a circle of insertion pipe into which the first bottom pin of a U-shaped coil can be inserted; a plurality of first guide slide grooves are formed in the guide disc; the driving rotary disc is arranged below the guide disc; a plurality of second guide slide grooves are formed in the driving rotary disc; the pushing mechanism is provided with a plurality of push rods; each push rod penetrates through the corresponding first guide slide groove and second guide slide groove at the same time and can move in the first guide slide groove andthe second guide slide groove; and the driving rotary disc rotates relative to the guide disc to drive the push rods in the first guide slide grooves and the second guide slide grooves to move from outside to inside so as to push the second bottom pin of an outer ring to rotate towards the inner ring. According to the device, a coil barrel is tightened in a mechanical mode, and therefore, tightening efficiency is greatly improved, and meanwhile, coil deformation can be effectively avoided.

Description

technical field [0001] The invention relates to the processing of stator windings of a hairpin motor, in particular to a stator coil tightening device and a coil tightening method of a motor. Background technique [0002] The stator iron core of the existing card-issuing motor is a hollow structure, and several layers of annular coil units composed of U-shaped card-issuing coils are inserted inside the stator iron core. figure 1 It is a common U-shaped hairpin coil at present. The current domestic method is to manually insert the hairpin coils into a ring shape and then transfer them to the stator core. During this operation, we found many problems: [0003] (1) When each hairpin coil is inserted and a ring coil unit is about to be completed, the last few hairpin coils are difficult to insert because the coils are squeezed against each other, which requires a lot of labor for workers Energy and physical strength to insert the last few hairpin coils in place; [0004] (2)...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a stator coil tightening device and a coil tightening method for a motor under the background that current manual coil insertion is inefficient and prone to problems, and uses a mechanized way to pre-tighten the U-shaped coils in the stator winding, which is extremely efficient. Greatly improved production efficiency and good stability

Images