JPS6146139A - Stator of fine motor - Google Patents

Abstract

PURPOSE:To readily insert a coil by composing a stator core by bonding a plurality of split cores divided and formed. CONSTITUTION:A stator core 10 is formed by splitting so that the number of slots becomes the same to form split cores 111, 121 and bonding the cores, and two bonding portions 141, 151 are so set as to become the portions having no crossover track of coils 30 inserted into slots 20. Two split cores 111, 121 are formed in completely separated split state, suitable number of coils 30 are inserted into the prescribed slots 20 of the cores 111, 121, and engaged with dovetail grooves 17 formed axially on one of the bonding surfaces of the cores 111, 121 by engaging means with projecting strips 18 formed on the other of the bonding surfaces of the cores to correspond to the grooves 17.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to lul! This relates to the stator of an electric motor.

[Prior art and its problems] Conventionally, when manufacturing a highly assembled electric motor, such as one that is housed in the base of a vibrating cylinder of a bar vibrator for concrete, it has been difficult to manufacture a stator to be used. In this case, the coils are inserted into the slots on the inner circumference of the stator core manually because the inner diameter of the stator core is small and an automatic coil insertion device cannot be used. Because the stator cannot be inserted, it is extremely difficult to insert the coil, and in particular, the more turns the coil has, the more difficult it becomes to insert the coil, which limits the ability to reduce the diameter of the stator and limit the lengthening of the stator. , the output is also limited to about 100~200W, soo~
In order to obtain an output of 600W, the stator core had to be connected. It has also been proposed to insert coils into the stator using a special jig for inserting coils, but even with such a jig, it takes a lot of time to insert the coils, and - It sometimes took up to three hours to insert the stator coils, so it was not very productive.

Therefore, although the assembled type electric motor has a low output, the manufacturing cost is extremely high.

In view of the above, the present invention allows coils to be easily inserted even if the inner diameter of the stator core is small, without reducing the output. I
In order to easily manufacture the stator core, the stator core is constructed by joining a plurality of divided cores.In particular, in the present invention, it is possible to easily and reliably join the divided cores. We have invented a stator that enables this.

[Means for Solving the Problems] In other words, in the stator of the present invention, the stator core is formed by joining a plurality of split cores that are divided and formed so that the number of slots is the same, and all of the joint locations are on the inner periphery. The coil inserted into the slot in the slot is set so that there is no crossover between the split cores, and the coil is inserted into the slot in a split state.
It is characterized in that it is joined by means of fitting means between a dovetail groove formed on one of the joint surfaces and a protrusion formed on the other side to correspond to the dovetail groove.

[Example] Next, embodiments of the present invention will be described with reference to the drawings.

First, in the four-pole embodiment shown in FIGS. 1 to 5, (A) is a fixed structure in which a coil (30) is inserted into a slot (20) provided on the inner circumference of a stator core (10). The stator core (10) is a divided core (111) (121) formed by dividing the stator core (10) into three equal parts so that the number of slots is the same.
), and the two joining points (141)
(15+) are set so as to be the uninterrupted portions of the coil (30) inserted into the slot (20). Then, the two divided cores (111) and (121) are completely isolated and divided, and each divided core (11
+) (12+) Insert an appropriate number of coils (30) individually into the predetermined slots (20), and split core (1i+)
(121) are joined to each other, and in particular, the joining means is a dovetail groove (17) formed in the axial direction on one of the joint surfaces of both split cores (11+) and (12+), and It is joined by fitting means with a protrusion (18) formed on the other side so as to correspond to the above. In particular, all of the joining points are parts where the coil does not cross over, and each split core can be handled individually with the coil inserted, so one dovetail groove (17) and the other They can be easily joined by slidingly fitting the protrusions (18) in the axial direction. Also, the outside of the above-mentioned joint may be welded. To insert the coils into the slots (20), for example, in the case of 12 slots, three coils (30) are inserted into each of the divided cores (11+) (12+) in each of the six slots as shown in Fig. 4. . 24 again
In the case of slots, six coils (30) are inserted into each divided core (11+) (12+) as shown in Fig. 5 [a].
(overlap winding) or insert as shown in the same figure [b] (concentric winding).

Furthermore, in the six-pole embodiment shown in FIGS. 6 to 8, the stator core (10) is divided into three equal parts each having the same number of slots (11z) (122
) (132), and all of the three joints (142H15Z) (162) are slotted (2
The coil (30) inserted into the coil (30) is set so as to have no crossover. Then, three split cores (112
) (122) (132) are completely separated, and each divided core (11z) (12zH13z) is individually inserted with an appropriate number of coils (30) into the predetermined slots (20). Core (11z) (12z) (1
32) are joined together by means of fitting between a dovetail groove (17) formed on one side of the joint surfaces and a protrusion (18) formed on the other side in the same way as described above. In this case, the slot (
For example, in the case of 18 slots, the coil insertion into 20) is as follows:
Each split 1 core LiIZ) (i22
: 1 (13 + 2) coils (30
) as shown in Figure 7. In addition, in the case of 36 slots, each of the divided cores (112, 122, and 132) has six coils (30) each as shown in Fig. 8 [a] (overlap winding) or Fig. 8 [b] (concentric winding). Insert it into the sea urchin.

In the above embodiment, the case where the number of poles is 4 or 6 has been explained, but the present invention can be applied even if the number of poles increases, such as 8, 10, 12, etc., in the same manner as described above. This can be carried out by setting so that all the coils inserted into the slots do not cross over, and if the number of poles increases, it can also be carried out by dividing the stator core into four or more pieces. Since the number of joints between the divided cores increases and the manufacturing time becomes labor-intensive, it is preferable to divide the divided cores into two or three pieces.

Furthermore, there is no need to divide the divided cores into equal sizes.

[Function] As described above, in the present invention, the number of slots of the divided cores constituting the stator core (10) is the same, and all of the joints between the divided cores are portions of the coil (30) without crossing. Since it is set so that the stator core (10)
Even if the inner diameter of the coil is very small or the number of coil turns is large, each split core can be separated and easily connected to its corresponding predetermined slot (20) without any problem. It can be inserted into. Furthermore, since there is no coil crossover at the junction between the divided cores into which the coils are inserted, each divided core can be handled individually with the coil inserted.

As a means of joining the split cores, a dovetail groove (17) is provided on one side of the joint surface, and a corresponding protrusion (18) is provided on the other side, so that the split cores with the coils inserted can be connected to each other. Shift the position in the axial direction and insert one dovetail groove (1
7) by aligning one end with the other end of the other protrusion (18) and sliding it in the axial direction to fit the dovetail groove (17) and the protrusion (18). ``It is simple and has a solid structure, so it can be joined reliably without fear of separation.

In particular, since each split core can be handled individually even when the coil is inserted as described above, it is possible to join them using the fitting means without any problem. Although the stator is made up of a combination of split cores, it does not have an extra protruding part on the outside of the joint, unlike when it is fixed with screws, and can be fitted and attached to the vibrator frame. This makes it possible to easily construct an assembled electric motor in which both the inner diameter and the outer diameter are relatively small.

[Effects of the Invention] As described above, the present invention allows coils to be easily inserted into the stator core in a split state, and the split cores into which coils have been inserted can be easily and reliably joined to each other. In manufacturing a stator for an electric motor, the number of steps required for inserting coils and joining split cores, that is, the number of manufacturing steps, can be significantly reduced, and the stator of a assembled electric motor can be easily manufactured, greatly contributing to cost reduction. Moreover, the inner and outer diameters of the stator core can be made extremely small, and the length is not limited in any way, making it possible to easily manufacture a stator with a longer t@I than conventional products. You get enough.

Therefore, the present invention can be used as a stator for assembled electric motors, which can be produced in large quantities and at low manufacturing cost.Furthermore, it is possible to easily manufacture ultra-slim electric motors that are thinner than conventional products without reducing the output. It has very excellent effects, such as enabling

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment in the case of 4 poles, Fig. 2 is a sectional view of the same as above, Fig. 3 is a sectional view of a part of the split core separated, and Fig. 4 is a coil in the case of 12 slots. A schematic developed view showing the inserted state, FIG. 5 [al and [bl are each 24
A schematic development view showing the coil insertion state in the case of a slot, FIG. 6 is a side view showing an embodiment in the case of 6 poles, and FIG. 7 is a 18
FIGS. 8[al and 'D] are schematic developed views showing the coil inserted state in the case of 36 slots, but do not show the coil inserted state. (A) Stator, (10) Stator core, (20) Slot, (30)
・・・・・・Coil, (IL+)(12+)(11z)(
12z) (13z)...Split core, (1410
151) (142) (1520162)...Joining location, (17)...Dovetail groove, (18)...
... protrusion.

Claims (1)

[Claims] 1. The stator core is made by joining together multiple split cores that are divided into parts so that the number of slots is the same, and the joints are set so that all of the joints are parts where the coils inserted into the slots on the inner circumference do not cross over. Then, the split cores, in which the coils are inserted into the slots in a split state, are joined together by means of fitting between a dovetail groove formed on one of the joint surfaces and a corresponding protrusion formed on the other side. A stator for a narrow electric motor, which is characterized by: