JPH0429538A - Stator of motor - Google Patents

Abstract

PURPOSE:To improve workability, to automate connection work, to reduce manufacturing cost and to prevent resonance of winding by leading one end of winding in a two-pole motor, comprising two sets of windings connected in series, to a winding connecting part arranged on a terminal block and then connecting the windings in series. CONSTITUTION:Three winding connecting parts 15a, 15b, 15c and a single winding engaging part 20 are arranged on a terminal block 10 mounted on one end face of a core 2. One ends 6a, 7a of windings 6, 7, to be connected in series, are led to the winding connecting part 15b where they are secured integrally by means of a terminal metal 18 thus connecting the windings 6, 7 in series. Consequently, workability is improved and connecting work can be automated without requiring soldering work of lead wire to the windings 6, 7 or crimp terminal. Manufacturing cost can also be reduced because no special lead wire, crimp terminal or insulation tube is required. Furthermore, resonance of winding 7 due to vibration of the motor in operation can be suppressed because the central part of the winding 7 is supported on a motor frame.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stator for a motor having two sets of windings connected in series, and particularly to a wiring structure for connecting the windings in series.

[Prior art] For example, as a motor used in a juicer or mixer,
It is known that a pair of different magnetic poles facing each other are provided on the inner surface of a rectangular frame-shaped iron core, windings are wound around each of these different magnetic poles, and these two sets of windings are connected in series with each other. There is.

When connecting these two sets of windings in series, conventionally, one end of each winding is pulled out to the outside of the iron core, the insulation coating of these windings is peeled off to expose the core wire, and a new lead wire is attached to this core wire. is wrapped and soldered. Then, the soldering portions of these core wires and lead wires are covered with an insulating tube to insulate them from the iron core, and the two lead wires soldered to each of the windings are caulked using crimp terminals. Thus, the connection between the windings is established.

[Problems to be Solved by the Invention] However, according to this conventional winding connection structure, after the lead wire is once soldered to the end of the winding, the lead wire is caulked using a crimp terminal. Therefore, the connection work between the windings requires two steps. As a result, the number of man-hours required increases, the efficiency of the work decreases, and this becomes a hindrance to automating the winding connection work.

Furthermore, in addition to the windings, special lead wires, insulating tubes, and crimp terminals are required, which increases the number of parts, which, along with the aforementioned poor workability, leads to high costs. .

Therefore, the first object of the present invention is to obtain a motor stator that allows two sets of windings to be easily connected in series without using special lead wires, crimp terminals, etc., and has excellent workability. There is a particular thing.

A second object of the present invention is to provide a stator for a motor that can suppress resonance of the windings stretched between the winding locking part and the winding connection part and prevent the windings from breaking. It is in.

[Means for Solving the Problem] Accordingly, in claim 1, there is provided an iron core having a pair of different magnetic poles on the inner surfaces facing each other, and between the inner surfaces of the four corners of this iron core and both sides of the different magnetic poles. A two-pole motor is provided with four slots formed therein, two sets of windings respectively wound around the different magnetic poles through these slots, and one ends of the two sets of windings are connected in series with each other. Assuming that an electrically insulating terminal block is provided on one end surface of the iron core, and this terminal block is provided with a plurality of winding connection parts and a single winding locking part, respectively, located in the vicinity of the slot, One end of one of the windings to be connected in series is guided to one winding connection part adjacent to the winding locking part, and one end of the other winding is hooked to the winding locking part. It is characterized in that one end of one of the windings is extended toward the guided winding connection part, and the one ends of these two sets of windings are electrically connected to each other at the winding connection part.

Further, in claim 2, the motor frame that covers the terminal block is provided with a wall portion extending toward between the winding connection portion and the winding locking portion, and the wall portion is connected to the winding connection portion. It is characterized in that it is brought into contact with the central part of the winding that is stretched between the winding locking part and the winding locking part.

[Function] According to the configuration described in claim 1, by simply leading one end of the two sets of windings to one winding connection part on the terminal block, these windings are connected in series. This eliminates the need for the conventional troublesome work of soldering the lead wire to the winding or caulking the second lead wire using a crimp terminal. Therefore, the number of work steps can be reduced, workability is improved, and the number of parts can be kept small.

Moreover, one winding led to the winding connection part is guided to the winding connection part via the winding locking part along the outer circumferential shape of the iron core. The windings can be easily routed without interfering with the inner rotor.

Further, according to the configuration described in claim 2, since the central portion of the winding extending between the winding locking part and the winding connecting part is supported by contact with the wall part, the construction of this winding is easy. By changing the length, the resonant frequency of the winding can be actively changed.
It is possible to prevent resonance of the windings due to vibrations during motor operation.

[Embodiment 1] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

The stator indicated by reference numeral l in the figure includes an iron core 2 in the shape of a rectangular frame. As shown in FIG. 4, the iron core 2 has a pair of different magnetic poles 3g and 3b on mutually opposing parts of its inner surface, and these different magnetic poles 3a.

Four slots 4a, 4b and 5a, 5b are formed between 3b and the inner surface of the four corners of the iron core 2.

And these slots 4a, 4b and 5g.

A winding 6.degree. 7 is wound around each of the different magnetic poles 3a and 3b through 5b. The inner surfaces of the slots 4a, 4b and 5a, 5b are covered with an insulating sheet 8.
Thus, the iron core 2 and the windings 6 and 7 are electrically insulated.

A terminal block 10 made of synthetic resin is attached to one end surface of the iron core 2. The terminal block 10 includes a main body part 11 in the shape of a square frame that substantially matches the shape of one end surface of the iron core 2, and this main body part 11 is overlapped with one end surface of the iron core 10.

The body portion 11 is integrally formed with a winding frame 12 that prevents the windings 6.7 from unraveling. The winding frame 12 has a substantially cylindrical shape extending above the different magnetic poles 3a and 3b, and the winding 6.degree. 7 is in contact with the outer periphery of the winding frame 12.

Note that a guide hole 13 for positioning the terminal block 10 is opened in one end surface of the iron core 2.

The four corners of the main body 12 are connected to the slots 4a, 4 of the iron core 2.
b and 5a, 5b, and three of these four corners have winding connection parts 15a, 15b,
15c is integrally provided in a protruding manner. Winding connection part 15g, 1
5b and 15c have a rectangular column shape, and a fitting hole 16 is opened at the tip end surface thereof. In the case of this embodiment, the three 8-wire connecting parts 15a, 15b, 15C (7) and the fitting holes 16 are arranged on the same circumference Xl centered on the center point ol of the iron core 2, as shown in FIG. It is located in

A V-shaped insertion groove 17 connected to the fitting hole 16 is formed in the opposing side walls of the winding connection parts 15a, 15b, and 15c. Part 6
a, 6b and 7a, 7b are guided.

Conductive terminal fittings 18 are press-fitted into the fitting holes 16 of the winding connection parts 15a, 15bs, 15c, respectively. The terminal fitting 18 is composed of a main body part 18a that fits into the fitting hole 16, and a tongue piece 18b that is connected to the main body part 18a, and a V-shaped notch 19 is formed at the insertion tip of the main body part 18a. There is.

Therefore, when the terminal fitting 18 is press-fitted into the fitting hole 16 with the ends 6a, 6b and 7a, 7b of the winding 6.7 passed through the insertion groove 17 of the winding connection part 15a, 15b, 15c, End 6a of winding 6.7.

6b, 7a, and 7b are sandwiched between the V-shaped insertion groove 17 and the notch 19, and the winding 6.7 and the terminal fitting 18 are mechanically connected.

Moreover, in this case, the edge of the notch 19 bites into the insulation coating (not shown) on the outer periphery of the winding 6.7 and comes into contact with the core wire (not shown) inside this insulation coating, so that the winding 6
, 7 and the terminal fitting 18 are electrically connected simultaneously with the mechanical connection.

Further, a winding locking portion 20 is integrally provided on the remaining one of the four corners. The winding locking part 20 has a columnar shape, and has a hook part 21 on the tip of which the winding 7 is hooked.

Therefore, one end 6a and the other end 6b of one winding 6 are guided to winding connection parts 15a and 15b located on both sides of this winding 6, and are fixed by the terminal fittings 18.

On the other hand, one end 7a of the other winding 7 is connected to the winding locking portion 2
After being hooked onto the hook portion 21 of 0, it is guided toward the adjacent winding locking portion 15b, and is fixed together with the one end 6a of the one winding 6 by the terminal fitting 18. From this, one end 7a of the other winding 7 is connected to the winding locking portion 20.
and the winding connection portion 15b in a straight line, and is routed along the outer periphery of the iron core 2. Further, the other end 7b of the winding 7 is led to the remaining winding connection portion 15c located on one side of the winding 7, and is fixed by the terminal fitting 18 in the same manner as described above.

Motor frames 25 and 26 are connected to both ends of the stator 1, as shown in FIG. The motor frames 25 and 26 are made of synthetic resin, and a connecting portion 27 is formed at the end of the motor frame on the stator 1 side so as to cover the outer periphery of both ends of the iron core 2 . The stator 1 and the motor frames 25 and 26 are fixed together by screws 28, and a recessed relief part 29 is formed in the side wall of the motor frame 25 and 26 to allow the screw 28 to pass through. ing.

Further, on the inner surface of the relief part 29 of one motor frame 25, as shown in FIGS. 1 and 5, a rib extends between the winding locking part 20 and the winding connection part 15b. A shaped wall portion 30 is integrally provided in a protruding manner. The tip of the wall portion 30 is in contact with the center portion of the winding 7 that is stretched between the winding locking portion 20 and the winding connection portion 15b, and presses the winding 7.

Inside the stator 1 and motor frame 25,26,
A rotor 31 is housed therein. The rotor 31 is a rotating shaft 32
It has an integrated structure. This rotating shaft 32 is placed vertically along the vertical direction, and its upper and lower ends are supported by the motor frames 25 and 26 via bearings 33. Rotating axis 3
A commutator 34 is provided on the outer periphery of the motor frame 2, and this commutator 34 is in contact with a carbon brush 35 located inside one motor frame 25.

A lead wire from the power source is connected to the tongue piece 18b of the terminal fitting 18 to which the other end 6b of the winding 6 is connected, and the tongue piece 18 of the terminal fitting 18 to which the other end 7b of the winding 7 is connected.
Lead wires from the carbon brushes 35 are connected to the terminals b, respectively.

According to such a configuration, the terminal block 10 stacked on one end surface of the iron core 2 has the slots 4 a * 4 b + 5
Three winding connection parts 15a located near the a r5b.

15b, 15c and a single winding locking portion 20 are provided respectively,
One end 6a of one winding 6 to be connected in series is passed through the insertion groove 17 of one winding connection part 15b, and the other winding 7
After hooking one end 7a to the winding locking part 20, it is led to the winding connection part 15b and passed through the insertion groove 17, and the one ends 6a, 7a of these two sets of windings 6.7 are connected to the winding wire 6.7. Since the terminal fittings 18 are integrally fixed in the insertion groove 17, when connecting the windings 6.7 in series, the windings 6.7 are simply connected.
It is sufficient to simply route one ends 6a, 7a of the wire 7 toward the winding connection portion 15b.

Therefore, there is no need to solder the lead wires to the windings 6, 7 or caulk the lead wires using crimp terminals as in the prior art, and the number of work steps is reduced accordingly.

Therefore, the workability when connecting the windings 6 and 7 in series is significantly improved, which is convenient for automating the connection work.

In addition, since special lead wires, crimp terminals, and insulating tubes for insulation are not required, the number of parts of the stator 1 can be reduced, and in addition to the above-mentioned improvement in workability, manufacturing costs are reduced. can be reduced.

At the same time, one end 7a of the winding 7 is connected to the winding locking portion 2.
0 to the winding connection part 15b, one end 7a of this winding 7 is routed along the outer periphery of the iron core 2, so that one end 7a of the winding 7 connects to the rotor 31. This winding 7 can be easily routed without interference.

Furthermore, a motor frame 25 is provided at the center of the winding 7 that is stretched between the winding locking part 20 and the winding connection part 15b.
Since the wall portion 30 extending from the winding 7 is in contact with the wall portion 30, the central portion of the winding 7 is supported by the motor frame 25.

Therefore, since the length of the winding 7 between the winding locking part 20 and the winding connection part 15b changes, the resonant frequency of this part of the winding 7 can be actively changed. , the resonance of the winding 7 caused by vibrations during motor operation is suppressed, and the winding 7
It is possible to prevent wire breakage.

In addition, in the case of this embodiment, the winding connection portion 15a of the terminal block 10
, 15b, and 15c are arranged on the same circumference X1 centered on the center point 01 of the iron core 2. For example, when press-fitting the terminal fitting 18 into the fitting hole 16, a device for press-fitting the terminal fitting 18 is required. The terminal blocks 10 are placed at one point on the same circumference
If the terminal fitting 16 is rotated together with the iron core 2, there is an advantage that the press-fitting operation of the terminal fitting 16 can be easily automated.

Note that the present invention is not limited to the first embodiment described above, and a second embodiment of the present invention is shown in FIGS. 6 and 7.

The difference between this second embodiment and the first embodiment is that the main body 11 of the terminal block 10 includes a winding locking part 20 and a winding connecting part 15.
A wall portion 41 extending toward the wall portion 4 is provided between the wall portion 4 and
1 is brought into contact with the central portion of the winding 7 stretched between the winding locking part 20 and the winding connecting part 15b,
The other configurations are the same as those of the first embodiment.

Also in the configuration of this second embodiment, since the center portion of the linearly constructed winding 7 is supported by the wall portion 41,
This resonance of the winding 7 can be prevented.

At the same time, since the wall portion 41 is located on the terminal block 10 around which the winding wire 7 is routed, misalignment between the wall portion 41 and the winding wire 7 can be minimized.

Further, in the above embodiment, the ends of the two sets of windings led to the winding connection part were electrically connected via the terminal fittings, but the present invention is not limited to this, and for example, the ends of the two sets of windings led to the winding connection part Alternatively, soldering may be performed within the fitting hole.

Furthermore, the motor according to the present invention is not limited to being used in a mixer or a juicer, and the direction in which the rotating shaft is installed is not limited to vertical installation in the vertical direction, but may of course be installed horizontally.

[Effects of the Invention] According to the structure of claim 1, when connecting the windings in series, it is sufficient to simply route one end of the winding toward the winding connection part. There is no need to solder the lead wire or caulk the lead wire using a crimp terminal, which reduces the number of work steps.

Therefore, the workability when connecting the windings in series is significantly improved, which is convenient for automating the connection work.

In addition, since there is no need for special lead wires, crimp terminals, or insulation tubes, the number of stator parts can be reduced at the same time.In addition to improving the workability mentioned above, manufacturing costs are also reduced. It is possible to reduce the

According to the structure of claim 2, since the central portion of the winding stretched between the winding locking portion and the winding connection portion is supported by the motor frame, the resonant frequency of the installed portion of the winding is reduced. This has the advantage of being able to actively change the winding, suppressing resonance of the winding due to vibrations during motor operation, and preventing disconnection of the winding.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, FIG. 1 is an exploded perspective view of the stator and its surroundings, FIG. 2 is a plan view of the stator, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a plan view of the iron core, FIG. 5 is a sectional view of the motor, and FIGS. 6 and 7 show a second embodiment of the present invention. , FIG. 6 is a plan view of the stator, and FIG. 7 is a view in the direction of the arrow in FIG. 6. 1... Stator, 2... Iron core, 3a, 3b... Different magnetic poles, 4a, 4b, 5a, 5b... Slot, 6.7-
...Winding, 10-...Terminal block, 15a, 15b, 15c
m Winding connection part, 20... Winding locking part, 30.41...
・Wall.

Claims (1)

[Scope of Claims] 1. An iron core having a pair of different magnetic poles on inner surfaces facing each other, four slots formed between the inner surfaces of the four corners of this iron core and both sides of the different magnetic poles; A two-pole motor comprising two sets of windings respectively wound around the different magnetic poles through slots, and one ends of the two sets of windings connected in series, wherein one end face of the iron core is electrically insulated. A terminal block is provided with a plurality of winding connection parts and a single winding locking part located near the slot, and one end of one of the windings to be connected in series is provided on the terminal block. is guided to one winding connection part adjacent to the winding locking part, and one end of the one winding is guided with one end of the other winding being hooked to the winding locking part. What is claimed is: 1. A stator for a motor, characterized in that the two sets of windings are spanned toward a wire connection portion, and one ends of these two sets of windings are electrically connected to each other at the wire connection portion. 2. The motor frame that covers the terminal block is provided with a wall extending between the winding connection part and the winding locking part, and this wall part is connected to the winding connection part and the winding locking part. 2. The motor stator according to claim 1, wherein the motor stator is brought into contact with a central portion of a winding extending between the stator and the winding.