CN2669456Y - Miniature DC motor - Google Patents

Abstract

The utility model provides a miniature DC motor rotor, comprising a rotor iron core and a rotation shaft which is penetrated through the center of the rotor iron core. The periphery of the rotor iron core is provided with a wiring trough along axial direction for winding coil curl. Two ends of the rotor iron core are provided with an insulating sheet which is concentric with the rotor iron core. The edge of the insulating sheet stretching out around the wiring trough of the rotor iron core is bent inwardly in a right angle.

Description

Miniature cocurrent electromotor

Technical field

The utility model relates to a kind of micromotor.Specifically, the utility model relates to the rotor of miniature cocurrent electromotor.

Background technology

Traditional miniature cocurrent electromotor comprises stator and rotor.Rotor 100 comprises rotating shaft 101, is stacked in the rotor core 102 that the silicon steel sheet in the rotating shaft 101 is formed with one heart, is wound with rotor winding 103 on the iron core.The other end that one end of rotating shaft 101 is equipped with rheostat 105, commutator 106 in proper order, end lubricating pad circle 107 and adjust packing ring 108, rotating shaft 101 then is equipped with thrust housing 109 and adjusts packing ring 110.The profile of rotor 100 as shown in fig. 1.In order to prevent rotor winding 103 and to change conduction between the heart iron core 102; Method commonly used is that insulating trip or insulating coating 104 are installed at the iron core two ends, consults Fig. 2 a, 2b and Fig. 3 a-3c, perhaps is coated with coating insulation material 112 in two end faces of iron core and winding slot, consults Fig. 4 a-4c.

As shown in Fig. 2 and Fig. 3, when employing is installed the method for insulating trip at vertical two ends of iron core 102, adopt drawing or injection molding dual mode to make insulating trip usually.The needs of assembling no matter adopt any forming mode, owing to all can have suitable gap in the winding slot part between insulating trip 111 and the iron core 102.Make the space that holds coiling reduce, reduction can be wound on the coil turn in the wire casing.Thereby make the little micromachine of manufacturing volume become difficult, even may not make external diameter is φ 5.0mm or following rotor core.

Therefore, when making external diameter and be φ 5.0mm or following rotor core, must make rotor core end face and inner surface be coated with coating insulation material.

When adopting iron core end face and inner surface to be coated with the method for coating insulation material, because the cause of process equipment and processing method makes production cost and defect rate than higher, particularly external diameter is φ 5.0mm or following rotor core.

For this reason, must develop and a kind ofly be different from being applicable to of prior art and make the method that the external diameter of micromachine is 5.0mm or following rotor.

Fig. 3 a-3c illustrates the traditional punching press insulating trip assembling and the schematic diagram of winding space.The insulating trip that can see drawing from Fig. 3 c can form a spring back angle θ, thereby reduce the space of coiling in the rotor slot when iron core bends.

Fig. 4 is traditional schematic diagram that is coated with coating insulation material 112 and winding space 113.Owing to all applying insulating material between insulating trip and the iron core and in the winding slot at iron core before the setting-in coil, thereby reducing the space of coiling in the rotor slot.

Summary of the invention

A purpose of the present utility model provides a kind of rotor of miniature cocurrent electromotor.

Another purpose of the present utility model provides a kind of method of making the rotor of miniature cocurrent electromotor.

According to an aspect of the present invention, a kind of rotor of miniature cocurrent electromotor comprises rotor core, runs through the rotating shaft of core center, and the external cylindrical surface of iron core has the wire casing of coiling vertically abreast.

It is characterized in that the insulating trip concentric with iron core installed at the axial two ends of rotor core.Insulating trip stretches out the edge to wire casing inboard right angle bending around winding slot of core.

According to another aspect of the present invention, a kind of manufacture method of miniature cocurrent electromotor rotor, punching press or injection molding insulator are installed in the axial two ends of changeing heart iron core with one heart with insulating trip, and insulating trip is bent to wire casing invagination right angle along rotor core wire casing edge.

The utility model is in the conventional electric machine rotor of the insulating trip that punching press or injection molding are installed as the core insulation purposes of the coil of coiling and rotor, append the stretching process of assembling behind the insulating trip, reach the increase winding space by following three aspects, increase the insulating trip shoe and cover the good result that length has the improvement insulation, can make the following rotor of φ 5.0mm adopt the insulating material of the insulating trip of punching press or injection molding as coil and rotor core, thereby reduce the production cost of motor greatly, comprise equipment cost, production efficiency is provided.

The utlity model has following advantage,

1. eliminated insulating trip fully and assembled necessary fit-up gap (T1=0), winding space is increased.

2. can be with (T3＜T2) sees from the parameter of actual measurement to reach and spray the same thickness of insulation, makes the winding space increase along the axial insulating trip marginal portion tension-thining of rotor core.

3. the attenuation because the edge that the axial insulating trip of rotor core bends is stretched, the axial length that makes insulating trip cover iron core increases (H2＞H1), further improve insulation effect.

Description of drawings

Fig. 1 represents the schematic diagram of the structure of traditional miniature cocurrent electromotor rotor;

The deep draw insulating trip that adopts in the rotor of Fig. 2 a-2c presentation graphs 1;

Fig. 3 a-3c represents the assembling of punching press insulator and the winding space schematic diagram of traditional miniature cocurrent electromotor rotor;

Fig. 4 a-4c represents application insulation and around around the space schematic diagram;

Fig. 5 a-5b represents the state before the insulating trip of miniature electric machine rotor of the present utility model stretches;

Fig. 6 a-6b represents the state after the insulating trip of miniature electric machine rotor of the present utility model stretches.

Embodiment

Consult Fig. 5 a-5b and 6a-6b below, describe most preferred embodiment of the present utility model.At Fig. 5 and Fig. 6, adopt identical label with part corresponding among Fig. 1-4.

State before stretching when rotor of the present utility model has been installed insulating trip has been shown among Fig. 5 a-5b.As shown in Fig. 5 a-5b, suppose that the edge and the gap between the iron core of the insulating trip 111 of right angle bending is T1, the thickness at insulating trip 111 edges is T2, the width at the edge of folding insulating trip 111 is H1.From Fig. 5 a, can see, before the stretching of insulating trip 111 under the state, obvious gapped T1 between the edge of insulating trip 111 and the iron core, this gap T1 exists if leave, will reduce the space that coil is installed, influence the efficient of motor, even be difficult to make the rotor under the diameter phi 5.0mm.

State after the edge that Fig. 6 a-6b shows the insulating trip right angle bending of miniature cocurrent electromotor rotor of the present utility model stretches.Shown in Fig. 6 a, after the insulating trip drawn operation, insulating trip becomes H2 in the length of the bending part of adjacent windings both sides from H1, and the length of the axial cover part that the back that stretches increases is (H2-H1).Gap T1 between insulating trip and the iron core then becomes 0.The thickness of insulating trip becomes T3 from T2, wherein T2＞T3.

Because the gap T1 between insulating trip and the iron core is 0, the thickness of insulating trip is decreased to T3, thereby after the insulating trip drawn operation, the space that can hold coil in the rotor core correspondingly increases.After the stretched operation of insulating trip had been shown among Fig. 6 b, rotor core wire casing winding space obviously increased.

Although described the utility model above with reference to most preferred embodiment, foregoing only is exemplary, is not restrictive.Those skilled in the art can make various remodeling and variation to the utility model according to spirit of the present utility model.All these remodeling and variation all belong to protection range of the present utility model.Protection range of the present utility model is limited by claim hereinafter.

Claims (5)

1. the rotor of a miniature cocurrent electromotor comprises rotor core, runs through the rotating shaft of core center, and the external cylindrical surface of iron core has the wire casing of coiling vertically abreast,

It is characterized in that the insulating trip concentric with iron core installed at the axial two ends of rotor core.Insulating trip stretches out the edge to wire casing inboard right angle bending around winding slot of core.

2. according to the motor rotor of claim 1, it is characterized in that described insulating trip is T2 around the thickness of edge bending part, the gap T1 in the edge of described insulating trip bending and the groove between the iron core is zero.

3. according to the motor rotor of claim 2, behind described right angle, insulating trip winding slot edge and the trench bottom axial tension along the line, the thickness of this bending part becomes T3 from T2, T3＜T2.

4. according to the motor rotor of claim 2, it is characterized in that, the rotate sub-wire casing right angle bending of described insulating trip edge, and behind the trench bottom axial tension along the line, the length at described edge becomes H2 from H1, H2＞T1.

5. a miniature cocurrent electromotor comprises casing, stator, it is characterized in that also comprising the rotor according to claim 1.

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