JPS62268330A - Stator structure of motor - Google Patents

Abstract

PURPOSE:To improve working efficiency in assembling a stator core, by gallingly engaging an insertion stick with lug when the stator core of a motor is assembled. CONSTITUTION:A stator core of a motor is of laminated structure where many electromagnetic steel plates 10 of the same size are laid in piles. In assembling the electromagnetic steel plates 10 in lamination, a plurality of circular securing holes 12 are bored in advance to each electromagnetic steel plate 10. By inserting stick members 14 into each of these securing holes 12, each electromagnetic steel plate 10 is integrally secured. In this way, the working efficiency for assembling the stator core can be improved and the stator structure of motor can be offered without deviation among all the laminated electromagnetic steel plates.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention mainly relates to the stator structure of AC electric motors such as AC surfo motors, and in particular to positioning and fixing laminated steel plates in the shape of a laminated body when assembling a stator core. The present invention relates to a stator structure formed by.

[Conventional technology]

The stator core of a conventional electric motor is constructed by laminating the laminated electromagnetic steel plates that are the constituent members of the stator core and then welding them together, or by inserting them into multiple bolt insertion holes provided in the axial direction of the stator core. A single stator structure was assembled by fastening and fixing with bolts and a Nand screw threaded onto the bolts.

[Problem that the invention seeks to solve]

However, among the above-mentioned conventional stator core assembly methods, the welding method causes thermal deformation of the stator core, and the work cost is relatively high. Furthermore, in the fastening method using bolts and nuts, the bolt insertion hole is formed to be larger than the bolt diameter, which has the disadvantage that the laminated plates cannot be aligned accurately, and the work efficiency is poor, which ultimately increases the cost of the electric motor.

Therefore, in order to solve these problems, the present invention aims to improve the working efficiency of the stator core assembly work and provide a high-quality, low-cost stator structure for an electric motor with no misalignment between laminated members. That is.

[Means for solving problems]

In view of the above-mentioned objects of the invention, the present invention provides a stator structure for an electric motor, in which each laminated member constituting the stator core is located at a plurality of locations in the outer peripheral area of the winding insertion groove, together with the winding insertion groove. a plurality of fixing holes formed in an r-shaped shape, each fixing hole having an appropriate number of protrusions inside thereof, each fixing hole having an inner diameter smaller than the inner diameter of the fixing hole; The present invention also provides a stator structure for an electric motor, characterized in that the laminated body of the laminated members is fixed to the body structure by pushing in the insertion rod having a diameter larger than the inner diameter of the protrusion in the axial direction.

[Function] According to the means 1 of the present invention, when assembling the stator core of an electric motor, the insertion rod and the protrusion are engaged with each other, and the laminated member is accurately and firmly strengthened. It can be fixed by

〔Example〕

Hereinafter, the present invention will be explained in more detail based on embodiments shown in the accompanying drawings.

FIG. 1 (al is an implied front view of the stator core of the electric motor according to the present invention, (bl is the side view thereof, and FIG. This is a partially cutaway enlarged view of.

Referring to FIG. 1, the stator core of the electric motor has a laminated structure in which a large number of electromagnetic steel sheets 10 of the same shape are stacked.

When assembling a large number of electromagnetic steel plates 10 in a stacked manner in this way, each electromagnetic steel plate 10 is provided with a plurality of (two in this example) circular fixing holes 12, and each of these fixing holes 12 is provided in advance. Each electromagnetic steel sheet 10 is fixed integrally by pushing the rod portion 4J (or tube member) 14 into the hole 12. More specifically, each fixing hole 12 is formed in the outer peripheral area of the slot (winding insertion 2M) 18 of each electromagnetic steel sheet 1o, at equal intervals in the circumferential direction (180 degrees in this example) and with the same size in the radial direction. All electrical steel plates are located at

The same shape, the same J method, and the same position are provided throughout. Therefore, when the electromagnetic steel sheets 1o are stacked, these fixing holes 12 are lined up in the direction of the axis C of the stator core, and the rod member 14 can be inserted into the fixing holes 12. Moreover, because of the above-mentioned equal arrangement of the fixing holes 12, the laminated electromagnetic steel sheets 1o fixed in an integral structure will not be displaced or deformed from each other after being assembled and fixed. Further, in order to facilitate the pushing operation of the rod member 14, the length 7!2 of the rod member 14 is set to be an appropriate amount longer than the thickness dimension β1 of the stack of electromagnetic steel sheets 1o.

Next, with reference to FIG. 2, the detailed structure of the fixing hole 12 and its relationship with the rod member 14 will be described. A plurality of (three in this embodiment) small projections 16 of the same size are provided in the fixing hole 12 for an LSI.

The projection 16 is preferably formed to become thinner as it approaches the tip so that the rod JfA14 and the projection 16 are engaged when the rod JfA14 (Fig. 1) is pushed in, and in this embodiment, it is like this. is formed.

Also, the rod part + A14 (Fig. 1) is connected to the center of the fixing hole 12.
In order to push in concentrically, the number of the protrusions 16 is 1.
Three or more protrusions per one fixing hole 12, and these protrusions 1
6 are preferably arranged at equal intervals, and in this embodiment they are formed in this manner. Since the fixing hole 12 having the above structure is formed in one punching process together with the slot 18 shown in FIG. 1, the cost is not high.

The outer diameter of the rod member 14 (FIG. 1) that is further pushed in is smaller than the diameter D1 of the fixing hole 12, and the projection 16 is smaller than the diameter D1 of the fixing hole 12.
The diameter D2 is larger than the diameter D2 of a circle virtually touching the tip of the circle. Note that at least one end of the rod member 14 is sufficiently chamfered to facilitate insertion. Further, the material of the rod member 14 is preferably the same as that of the electromagnetic steel sheet 10. With the above two configurations, the rod member 14 can be pushed into the stack of electromagnetic steel plates 10, and a high quality stator core in which the slots 18 (FIG. 1) of the laminated electromagnetic steel plates 10 are aligned is constructed.

Although the fixing hole 12 is circular in the above embodiments, it may be configured as a square hole, for example, and the insertion ring inserted into the square hole may be either square or circular.

Of course, it is also possible to configure the hole with a topographic shape and the insertion ring with other shapes.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it is possible to improve the work efficiency of stator core assembly work and to provide a high-quality, low-cost stator structure for an electric motor with no misalignment between laminated electromagnetic steel plates. It becomes possible to do so.

[Brief explanation of the drawing]

FIG. 1 (al is an implied front view of the stator core of the electric motor according to the present invention, (bl is a side view thereof, and FIG. 2 is an illustration of the fixing hole area of each laminated electromagnetic steel sheet of the stator core of the electric motor according to the present invention. Enlarged partial fracture view. 10... Laminated electromagnetic steel plate, 12... Fixing hole,
14... Rod member (insertion ring), 16... Protrusion, 18
...Slot (winding insertion groove).

Claims (1)

[Claims] 1. In a stator structure of an electric motor, each laminated member constituting the stator core has a plurality of fixing members formed in advance together with the winding insertion groove at a plurality of locations in the outer peripheral area of the winding insertion groove. The fixing hole has an appropriate number of protrusions inside thereof, and each of the fixing holes has a diameter smaller than the inner diameter of the fixing hole and larger than the inner diameter of the protrusion. A stator structure for an electric motor, characterized in that the laminated body of the laminated members is fixed into an integral structure by pushing in the inserted insertion rod in the axial direction. 2. Fixing the electric motor according to claim 1, wherein the fixing hole is circular, and the appropriate number of protrusions are provided at equal intervals in the circumferential direction with respect to the center of the fixing hole. Child structure. 3. The stator structure for an electric motor according to claim 1, wherein the fixing holes are provided at equal intervals in the circumferential direction with respect to the center of each laminated member.