JPH055813Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an armature for a small motor in which yoke plates are attached to both ends of a laminated core.

[Prior art]

Conventional stacking of normal cores does not collect enough magnetic flux, and in order to collect enough magnetic flux, it is necessary to increase the thickness of the stack, and the thicker the stack, the greater the winding resistance, so this problem has been solved. As a method for this, as shown in FIGS. 4 to 6, yoke plates 9 are extended at both ends of the laminated core 4 to suppress the laminated thickness of the core and the winding resistance.

The slot width w'' of the conventional yoke plate 9 is formed to be equal to the slot width w of the laminated core 4. Therefore, as shown in FIG _.
Because the diameter of the fryer becomes too wide and gets in the way,
D ₂ must be large, the winding wire of the coil is difficult to wind, and the end face of the yoke plate makes it easy to cut the winding wire during winding.

Furthermore, since the slot-side ends of the yoke plate 9 protrude left and right from the joints with the ribs of the yoke plate, they are easily bent and difficult to form into an arc. It has disadvantages such as it tends to stick out to the side and the winding space becomes narrow. Further, when soldering the coil lead wire 8a to the commutator 7 as shown in FIG. 6, the slot width w'' of the yoke plate 9 is narrow, so the soldering is troublesome.

[Purpose of invention]

In view of the above-mentioned drawbacks, the present invention has been developed to improve the armature of a small motor by widening the slot width of the yoke plate so that the yoke plate does not get in the way of the coil winding, making winding easier and preventing the winding wire from breaking. It is to propose.

[Structure of the idea]

The present invention provides an armature in which a plurality of winding slots and salient poles are formed in a laminated core, and a salient pole part of a yoke plate is extended from the periphery of the salient pole to concentrate magnetic flux in the lamination direction of the core. The slot width of the yoke plate is wider than the slot width of the laminated core.

〔Example〕

Hereinafter, the present invention will be explained with reference to an illustrated embodiment. As shown in FIGS. 1 to 3, the armature of a small motor consists of a core 1 made of magnetic material, a plurality of winding slots 2 and salient poles 3 formed therein, and salient poles at both ends of a laminated core 4 in which a plurality of winding slots 2 and salient poles 3 are formed. Yoke plates 5, 5 extend from the periphery of the core 3 in the stacking direction of the core 1, a rotary shaft 6 is press-fitted into the center of the stacked core 4, and a commutator 7 is press-fitted to one side.

The yoke plate 5 has a plurality of ribs 5 in contact with the laminated core 4.
a and a plurality of arc-shaped salient pole portions 5b protruding in the lamination direction of the laminated core 4.

A winding wire is wound around the ribs 5a of the laminated core 4 and the yoke plate 5 to form a coil 8, and a lead wire 8a of the coil 8 is connected to the commutator 7.

The width w ₁ of the salient pole 3 and the width w ₂ of the salient pole portion 5b are the angle formed by the salient pole 3 with respect to the armature center, and θ _{1 is} the angle formed by the salient pole portion 5b.
_When θ _{2 is the angle} formed by This is most appropriate when considering the ease of winding the wire.

In this way, the slot width w' between the salient pole portions 5b, 5b is formed wider than the slot width w between the salient poles 3, 3 of the laminated core 4.

Since most of the magnetic flux collected by the yoke plate 5 passes through the ribs 5a of the yoke plate 5, the slot width w' of the yoke plate 5 may be made wider than the slot width w of the laminated core 4 as in the present invention. Normally, sufficient magnetic flux can be collected, and even if it is insufficient, sufficient magnetic flux can be collected by increasing the dimension in the rising direction.

When the armature of a small motor is configured as described above, the slot width w' of the yoke plate 5 becomes wide, so the diameter _D1 of the flyer for winding can be small, and the winding of the winding wire can be made small. It becomes easier to wind the winding wire, and the winding wire is not cut at the end of the salient pole portion 5b, and the winding wire is not disturbed. Furthermore, when the slot width w' becomes wider, it becomes easier to solder the coil lead wire 8a. Furthermore, since the width w ₂ of the salient pole portion 5b of the yoke plate 5 is slightly wider than the width of the rib 5a, it becomes easier to process.

Furthermore, when the width of the yoke plate 9 is wide as in the conventional case, it is necessary to increase the width and area of the portion where the salient pole part 5b and the rib 5a of the yoke plate 5 are connected. If the width of the coil 5b is narrow, the width of the joint portion with the rib 5a can also be narrowed, so that a large winding space can be obtained, and the number of windings of the coil 8 can be increased, so that the output of the motor can be increased.

In Fig. 3 above, the length of the salient pole portion 5b of the yoke plate 5 in the core stacking direction is set to fit within a circle of diameter D ₁ of the fryer, but the length is set so that it protrudes outside the circle. It is also possible to increase the magnetic effect. The width _w2 of the salient pole portion 5b may be further narrowed and the slot width w' may be widened.

[Effect of idea]

Since the present invention is constructed as described above, the yoke plate does not get in the way of the winding, so the diameter of the flyer can be made small, the winding wire is not cut off at the edge of the yoke plate, making winding easier and facilitating soldering of the coil lead wire to the commutator. Furthermore, even if the slot width of the yoke plate is made wider than the slot width of the laminated core, the salient poles of the yoke plate extend in the lamination direction of the core, so that the magnetic flux can be sufficiently collected. Furthermore, it is possible to provide an armature for a small motor that has excellent practical effects such as a wider winding space.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a side view of the armature of a small motor, Figure 2 being a side view of the armature of a small motor;
The figures are a plan view of the armature of a small motor with the commutator omitted, Fig. 3 is a side view of the same, Fig. 4 is a perspective view of a conventional laminated core, Fig. 5 is a side view of the same, and Fig. 6 is a small motor of the same size. FIG. 3 is a side view of the armature of the motor. 1... Core, 2... Winding slot, 3... Salient pole, 4... Laminated core, w, w'... Slot width,
5...Yoke plate.

Claims (1)

[Scope of utility model registration request] In an armature in which a plurality of winding slots and salient poles are formed in a laminated core, and a salient pole portion of a yoke plate extending from the periphery of the salient pole to concentrate magnetic flux in the lamination direction of the core, the yoke plate An armature for a small motor, wherein the slot width of the laminated core is wider than the slot width of the laminated core.