JPS5840776Y2 - AC motor - Google Patents

Description

[Detailed description of the invention] The present invention relates to an AC motor, and in particular, a relay part that connects an eyeliner and a stator winding terminal is formed separately from the protective cover of the AC motor, and this relay part is connected to a coil bobbin. To provide an AC motor in which the resin material for the protective cover is made inexpensive by attaching and fixing the protective cover by engaging the concave and convex parts, thereby reducing the cost, and furthermore, the protective cover can be selectively attached. The purpose is to

FIG. 1 shows a conventional AC motor.

This AC motor (4-pole synchronous motor) has a rotating shaft 1 rotatably held within a stator core frame 3 by a bearing housing 2, and resin protective covers 4.5 are attached above and below.

6a and 6b are the Hiji line.

The basic structure of the AC motor according to the present invention is the same as that of the conventional motor.

Fig. 2 is a plan view with the rotating shaft 1, bearing housing 2, and upper protective cover 4 removed in Fig. 1, and Fig. 3 A and B are a front view and a view of the lower protective cover 5, respectively. FIG.

7a and 7b are pins, which are protruding pillars 5a on the back side of the protective cover 5.

It is planted in 5b.

These pins 7a and 7b have the function of a relay section, and are connected to the stator winding terminals 8a, sb, etc., and the output wires 6a, e.
b is connected and fixed.

From the viewpoint of safety, the relay part is required to be flame retardant.

For this reason, the protruding pillars 5a and 5b need to be made of flame-retardant resin.

Flame-retardant fats and oils are more expensive than general resins.

Conventionally, the protruding pillars 5a and 5b are integrally formed with the cover 5, which has the disadvantage that the entire cover is molded from expensive resin and the cost of the cover is high.

Since the housing and protruding pillars 5a and 5b are integrally constructed with the cover body, the cover 5 is always attached and the cover 4
．． It has been difficult to provide an AC motor without attaching 5.

The present invention eliminates the above four drawbacks by configuring the relay part as a separate body from the cover body, and one embodiment thereof will be described below with reference to the drawings.

FIG. 4 is a plan view of one embodiment of the AC motor according to the present invention with the upper and lower protective covers removed.

In the figure, the same components as those shown in FIG. 2 are denoted by the same reference numerals, and the explanation thereof will be omitted.

Fixed iron core frame 3 has resin coil bobbins 1 at 90° intervals.
0a to 10d are installed, each coil bobbin 10a to
A winding 11 is formed at 10d.

Reference numeral 12 denotes a relay block that constitutes a main part of the present invention, and includes the stator core frame 3 and the adjacent coil bobbin 10a.

10b, as will be described later.

This relay block 12 is shown in FIGS. 5A to G1 and FIG. 6A.
, H, and is separate from the protective cover 4 or 5.

Figure 5A. B and C are a front view, a side view, and a bottom view, respectively, and FIGS. 6A and 6B are perspective views, respectively, viewed from the upper diagonal downward direction and the diagonal upper direction in the direction of arrow A in FIG. 5A.

This relay block 12 has a pair of surfaces 12a112 on the inside.
b1 has an abbreviated shape with three surfaces 12 cm, 12 d, and 12 e on the outside.

Pins 7a and 7b are planted on the upper surfaces 12f and 12g.

A claw portion 1 is provided at the center of the inner adjacent surfaces 12a and 12b.
2h and 12i are provided protrudingly.

The upper back surfaces 12h-1 and 12f-1 (indicated by arrow B in the insertion direction of the claw portions 12b=12i) are slightly inclined in the direction of arrow B2 from a plane perpendicular to the surfaces 12a=12b, respectively.

A tongue portion 12j protrudes from the end of the lower surface 12d opposite to the pins 7a and 7b.

12 is an opening for drawing out the sunrise line. 12t is a space for preventing the generation of whiskers during molding.

Furthermore, the width l of each arm of the relay block 12 is equal to the dimension between the pair of flanges of the coil bobbin.

This relay block 12 is molded from flame-retardant resin.

On the other hand, the cover is molded from a suitable resin that is cheaper and one rank lower than conventional ones.

As a result, the amount of expensive flame-retardant resin used can be reduced overall, and the cost of parts can be reduced accordingly.

That is, by structurally separating the protective cover and the relay block, different resin materials can be used for the cover and the block, and overall costs can be reduced.

Moreover, for the adjacent coil bobbins 10a and 10bK, a pair of flanges 10a-1, 10a-2, 10b-1°1
0b-2 A recessed portion 10a-3*10b-3 is formed at a predetermined position of the inner collar portion 10a-1-10b-1.

As shown in FIG. 7, the recessed portion 10L3 has a surface 10a-4 that locks the surface 12L1 of the claw portion 12h formed as an inclined surface similar to the surface 12h-1.

The same applies to the recessed portion 10b-3.

Next, the operation and manner of mounting the relay block 12 on the AC motor will be explained with reference to FIG. 7.

Attachment is performed by placing the relay block 12 with the pins 7a and 7b on the upper side, and attaching each arm to the flanges 10a- and t of the coil bobbin 10a.
-10a-2, the flange 10b- of the coil bobbin 10b
, 10b-2, vertically upward from the back side of Fig. 4 (7th
This is done by inserting it in the direction of arrow B1 in the figure), and it is attached to the lower right corner of the stator core frame 3.

Each arm portion of the relay block 12 has a pair of flange portions 10a-1e10a-2 and 10b-1°10b- due to the gently sloped surfaces 12h-2 and 121-2 of the claw portions 12h=12i.
2 is smoothly and elastically pushed apart and inserted between the flanges.

This insertion operation is restricted at the position where the tongue piece 12j comes into contact with the lower surface of the stator core frame 3, as shown in FIG.

When the relay block 12 is inserted to the above position, each claw part 12h, 12i is connected to the collar part 10a-1s 1 ob.
The collar portion of each coil bobbin 108° 10b elastically returns to the position facing the recess 10a-3-10b-3 of 1, and the claw portion 12h and the recess 10a-3, and the claw portion 12i and the recess 10b-3. and are elastically fitted together.

This completes the installation of the relay block 12 alone onto the AC motor.

At this time, the relay block 12, in addition to the above-mentioned uneven fitting,
Each arm is connected to the flange 10a of the coil bobbin 10a, 10b.
1-10a-2 and 10b-1-10b-2, and the surface 12d abuts against the corner inner wall of the stator core frame 3, so that it is stably held.

In this installed state, the lead wires 6a and 6b, to which one ends of the pins 7a and 7bK are connected and fixed, pass through the space 12 and are drawn out to the outside through the draw-out opening 12k.

When the lead wires 6a, 6b are pulled, a force acts on the relay block 12 in the opposite direction (direction of arrow B2) to the insertion direction (direction of arrow B1).

However, the claws 12h, 12f and the recesses 10a-3s 10
As shown in FIG. 7, b-3 means that the surface 12h-1 inclined in the direction of arrow B2 is the surface 10a-1 similarly inclined.
4, and the arrow B of the relay block 12
Detachment in two directions is reliably prevented.

The tongue piece 12j prevents the relay block 12 from detaching in the direction of the arrow B1.

In addition, as shown by the two-dot chain line in Fig. 7, the relay block 1
2 is formed with an arm portion 12m having a hook-shaped tip, and this arm portion 12m is hooked to the lower end of the collar portion 10a-1 to restrict detachment of the relay block 12 in the direction of arrow B1. You can also do it.

As described above, the relay block 12 is mounted without using a dedicated mounting member such as a screw, and the number of component parts of the motor does not increase unnecessarily.

After the relay block is attached, the protective cover 13 is attached alone as shown by the two-dot chain line in FIG.

Alternatively, the AC motor may be constructed without the protective cover 13, if necessary.

Moreover, since the protective cover 13 and the relay block 12 are separate bodies, even if the protective cover 13 shakes, the relay block 12 will not shake (it is fixed).

Na button, the claws 12h and 12i and the recess 10a3e10b
The number and combination with -3 are not limited to the above embodiments, and can be determined as appropriate.

Furthermore, contrary to the above embodiment, it is also possible to adopt a configuration in which the claws are formed on the coil bobbin and the recesses are formed on the relay block.

As mentioned above, the AC motor according to the present invention has a plurality of coil bobbins for stator winding arranged inside the stator core frame, and the eyeliner and stator winding as separate members from the motor protection cover. An AC motor provided with a relay member having a relay pin connected to a wire terminal, a convex portion or a recess that engages the relay member with a concave portion or a convex portion of the flange of the coil bobbin, and The relay member has a shape having a tongue portion that comes into contact with the upper or lower surface of the stator core frame, and the relay member has a convex portion or a concave portion that engages with a corresponding concave portion or convex portion of the collar portion of the coil bobbin. , and a state in which the tongue portion is in contact with the upper surface or lower surface of the stator core frame d By having a configuration in which the tongue portion is independently fixed inside the stator core frame and between adjacent coil bobbins, the relay It is now possible to use different resin materials for the parts and the protective cover, reducing overall costs.Furthermore, it is also possible to provide an AC motor without a protective cover if necessary, and it is even possible to use a dedicated AC motor. The relay member can be fixed without using mounting screws, etc., and since the relay member is fixed in contact with the original space inside the stator core frame at multiple points, the AC motor It has features such as being able to be configured without changing the outer dimensions and also being able to fix the relay member sufficiently stably.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an example of a conventional AC motor, Figure 2 is a plan view with the bearing (in Figure 1), housing, upper protective cover, etc. removed, and Figure 3 AtB is the same as Figure 1. 4 is a plan view showing an embodiment of the AC motor according to the present invention with the rotor and protective cover removed, and FIGS. 5A and 5B are front and side views of the lower protective cover of the AC motor. , C are respectively a front view, a top view, and a bottom view of the relay block assembled in the electric motor shown in FIG. 4, and FIGS. 6A and B are perspective views of the relay block shown in FIG. , Figure 7 is the fourth
It is an enlarged sectional view along the line ■-■ in the figure. 1...Rotating shaft, 2...Bearing housing, 3...Stator core frame, 6a, 6b...
・Tade Line, 7a, 7b...Pin, 8a, a
b...Stator winding terminals, 10a to 10d...
...Coil bobbin. 10a-t -108-2*10b-t, 10
b-2・----・Trim part, 10 a-3* 10 b
-3... Recessed portion, 1Oa-4... Inclined locking surface, 11... Winding, 12... Relay block, 12h, 12i...・Claw part, 12h 1=
12i-1...plane, 12h-2゜121-
2... Slanted surface, 12j... Tongue, 12
k...Drawer opening, 12m...Archive-shaped arm portion, 13...Protective cover.

Claims (1)

[Scope of utility model registration request] A plurality of coil bobbins for stator winding are arranged inside the stator core frame, and a relay pin to connect the Hiji wire and the stator winding terminal is planted as a separate member from the motor protection cover. An AC motor is provided with a relay member, the relay member being in contact with a convex or concave portion that engages with a concave or convex portion of the flange of the coil bobbin, and an upper surface or a lower surface of the stator core frame. The relay member has a shape having a tongue portion that contacts the stator core frame, and the relay member has a convex portion or a concave portion that engages with a corresponding concave portion or convex portion of the flange portion of the coil bobbin, and the tongue portion engages with a corresponding concave portion or convex portion of the flange of the coil bobbin. An alternating current motor configured to be fixed independently between adjacent coil bobbins inside the stator core frame and in contact with the upper or lower surface.