KR850001778Y1 - Electric motor - Google Patents

Abstract

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Description

Coupling structure of motor housing and stator core

1 is a partially omitted cross-sectional view showing a conventional coupling structure.

Figure 2 is a partially omitted cross-sectional view showing a coupling structure of the present invention.

Figure 3 is a perspective view showing the structure of the stator core of the present invention.

Figure 4 is a perspective view showing the structure of the housing of the present invention.

5 is a partially enlarged view of the fourth direction in the P direction.

* Explanation of symbols for main parts of the drawings

1: motor 2: motor side

4, 9: housing 5: rivet

6, 7: housing flange 6a, 7a: protrusion

8: stator core 8: groove

12: rotor

The present invention relates to a coupling structure for coupling the stator core and the housing of the electric motor, and more particularly, to a coupling structure designed to prevent a gap defect due to poor coupling and to ensure easy assembly by ensuring precise assembly.

Conventionally, when the housing and the stator lower are coupled, holes are formed in the housing and the stator core to be coupled using rivets and the like. This results in the opening of the housings 4, 9 and the stator core 8 when the two housings 4, 9 and the fixing core 8 are symmetrically separated using the rivet 5 as shown in FIG. 1. (6b, 7b, 8b) and the rivet (5) there is a certain amount of gaps, when combined in this state because of the gap between the center of the housing (4, 9) and the stator core (8) is difficult to match and accordingly The gap 11 between the stator core 8 and the rotor 12 on the rotating shaft 2 has become a major cause of inconsistency and failure.

In addition, since the stator core 8 moves from the center side or the fastening part is loosened due to vibration and shaking of the motor for a long time, there are many factors that adversely affect the characteristics of the motor due to acceleration of gap failure. As a result, assembling using a gap gauge or the like in order to reduce gap defects, a lot of time has been lost.

Therefore, the object of the present invention is designed to improve the disadvantages described above as described in detail based on the accompanying drawings as follows.

2 is a partially omitted cross-sectional view for showing a coupling structure of the present invention, all the same as the conventional structure of FIG. 1, but can be seen in the drawing flange portions of the two housings (4, 9) symmetrically separated of the motor ( It can be seen that the configuration of the stator core 8 which is different in its configuration in 6 and 7 and which is fixed by the rivet 5 between the two separate housings 4 and 9 is different from the conventional one.

First, referring to FIG. 3 to describe the configuration of the stator core in more detail, the stator core 8 of the present invention has the same shape as the conventional one, but the grooves 8a are formed on both sides of the corners. different. This groove 8a is for securing the housing 4, 9 firmly so that the stator core 8 does not move when it is engaged with the two separate housings 4, 9.

Referring to FIG. 4, the four corners of the flanges 6 and 8 of the housings 4 and 9 are provided with protrusions 6a and 7a which can be inserted into the grooves 8a formed at the corners of the stator core 8 accurately. It is. The protrusions 6a and 7a are formed by cutting the bent portion of the flanges 6 and 8, as shown in the enlarged view of FIG. It is equal to the width H of the groove 8a of the core.

As described above, since the projections 6a, 7a and the grooves 8a are formed in the housings 4, 9 and the stator core 8, the two housings 4, 9 are projected on both sides of the stator core 8, and the projections 6a. , 7a can be simply coupled to fit the groove 8a so that the central axis of the stator core 8 and the central axis of the housings 4 and 9 can be accurately maintained while the housings 4 and 9 and the stator core The insertion holes 6b, 7b, 8b of the rivet 5 as known on (8) are automatically aligned exactly in a straight line so that the housing of the motor and the stator core are simply fastened and fixed by the rivet 5 It can be kept stable and fixed.

In the drawings, reference numeral 2 denotes a motor shaft, 3 a bearing, 10 a stator coil, and 12 a rotor of the motor. The motor rotor 12 is inserted into the center hole 13 of the stator core 8 of FIG.

The stator generated by moving the stator core 8 even though the housings 4 and 9 and the stator core 8 are coupled and fixed by the rivets 5 by constituting the housing and the stator core as described above. Not only can the defect of the gap 11, which must be retained between the core 8 and the rotor 12, be easily prevented, but the simple hole can be easily assembled without the need for a separate part such as a gap gauge during assembly. The practicality is expected to be quite large because it is possible to guarantee the quality of perfect performance at all times.

Claims (1)

In the housing and stator core coupling structure of an electric motor in which a stator core 8 is embedded between two symmetrically separated housings 4 and 9 having flanges 6 and 7 and fixed by rivets 5, A plurality of bent projections 6a, 7a having an H width are formed at appropriate locations of the flanges 6, 7 of each housing, and projections of the housings 4, 9 are provided at corresponding locations on both sides of the stator core 8. A stator core coupling structure with a housing of an electric motor formed by forming a corresponding groove 8a having an H width into which 6a and 7a can be inserted.