JPH11122854A - Stator of motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the treatment of the ends of windings, by a method wherein retainers which retain the electrical connection parts of the windings are provided on an outer flange part apart from the slots of the outer flange part in the circumferential direction. SOLUTION: A stator 10 is composed of a pole core 20, a bobbin 30 and a yoke 40. L-shaped winding leading-out slots 33a are provided on the end part in the axial direction of an outer flange part 33, and fall-off preventive protrusions are formed on housing part 33b which are provided apart from the winding leading-out slots 33a in the circumferential direction. After the end parts of the lead wires 51 of the respective windings are bundled, the bundled lead wires 51 are hooked on one of the winding leading-out slots 33a formed on the bobbin 30 and turned backward, and then the tip parts of the lead wires 51 are cut to same lengths to form a calked connection part for electrical connection. The lead wires 51 can be fixed and insulated securely only by pushing the connection part into the housing part 33b, while the lead wires 51 are wound around the outer wall of the outer flange part 33 with the winding leading-out slot 33a as a fulcrum. With this constitution, the end parts of the windings can be fixed to the outer flange part easily and the secure electrical insulation can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for an electric motor, and more particularly to a method for connecting and fixing terminals of a winding.

[0002]

2. Description of the Related Art An electric motor comprises a rotor integrally mounted on a rotating shaft and a stator arranged with a small gap from the outer peripheral surface of the rotor. The stator is configured, for example, as shown in FIG. That is, the stator 1 includes an annular magnetic pole portion 3 in which a rotor (not shown) is inserted and a winding 2 is wound around a plurality of magnetic pole teeth (not shown), and a yoke portion 4. .

The ends 2a of the respective windings 2 are extended, and after the insulating coating is removed, the windings 2 are electrically connected by soldering or the like to form connection portions 2b. Connection part 2
“b” is also called a neutral point connection line or a power supply unit connection line depending on the connection position, and is connected to form a predetermined electric circuit. The connecting portion 2b is a charged portion through which current flows, and the insulating coating is removed for connection.
As shown in FIG. 8 (a), after insulation is provided by an insulating tube 5 or the like, the coil end 3a of the magnetic pole portion 3 is tied with a binding yarn 6, or as disclosed in Japanese Utility Model Application Laid-Open No. 60-171058. For example, a method of inserting an insulating tube (bundling holder) into a slot (gap) between the magnetic poles and fixing the tube is adopted.

On the other hand, when the terminals 2a of the windings 2 are crimped and electrically connected, the terminals 2a of the windings 2 are aligned and caulked, then inserted into a crimping terminal and crimped with a caulking jig. The method was common.

[0005]

The above-mentioned conventional motor stator has the following problems. That is, the operation of inserting the connecting portion 2b into the insulating tube 5 is troublesome. The insulating tube 5 is connected to the coil end 3 of the magnetic pole 3.
The work of binding to a is troublesome. Furthermore, the work of inserting the insulating tube 5 between the windings 2 is troublesome. In particular, when the winding 2 is thick, it is difficult to bend the winding 2 and insert it for insertion. Furthermore, when crimping the terminal 2a, the work of aligning the terminal 2a is very troublesome.

Further, since the winding 2 has elasticity, there is a possibility that only the connecting portion 2b comes off from the insulating tube 5 to cause insulation failure. If an excessive force is applied during the insertion work to prevent this, the insulating tube 5 may be damaged, resulting in poor insulation. In addition, depending on the winding specification, the area of the slot portion becomes large, and the insulating tube 5 may fall down, resulting in poor insulation. SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly reliable stator for an electric motor that can process a terminal of a winding by a simple operation.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems and achieve the object, the invention according to claim 1 is divided into a yoke core and a magnetic pole part core having a plurality of magnetic pole teeth. In the stator of the electric motor, wherein the insulating member is provided with a winding wound around the magnetic pole teeth of the magnetic pole part iron core, the insulating member is wound around the winding and inserted and fitted into the magnetic pole teeth. The fitting portion to be fitted, the outer flange portion provided outside the fitting portion, the groove portion provided on the outer flange portion and guiding the end side of the winding, and the outer flange portion And a locking portion that is provided to be circumferentially separated from the groove portion and locks a connection portion that electrically connects a terminal of the winding.

According to a second aspect of the present invention, in the first aspect of the present invention, the connecting portion has a plurality of the windings twisted together and has a saw-like toothed portion inside thereof. It is formed by caulking with a caulking terminal.

According to a third aspect of the present invention, in the second aspect, the connecting portion is swaged at a plurality of locations by a plurality of swaging terminals. According to a fourth aspect of the present invention, in the second aspect of the present invention, the locking portion has a projection projecting in a radial direction, and the caulking terminal is connected to the projection at a terminal end. A matching hole is provided.

According to a fifth aspect of the present invention, in the first aspect, a part of the winding is locked between the groove and the locking portion in the outer flange portion. A draw-out groove portion is provided.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the drawing groove portion includes an insulating piece having cuts on both sides, and one end of the winding at the tip end of the insulating piece. And a groove for locking the portion.

As a result of taking the above measures, the following operation occurs. That is, in the invention described in claim 1, the end side of the winding is wound around the outer flange with the groove provided in the outer flange of the insulating member as a fulcrum, and the connection portion is locked to the locking portion. Can be. For this reason, the end part side of a winding can be easily fixed to an outer side flange part, and electrical insulation can be ensured.

According to the second aspect of the present invention, the connecting portion is formed by caulking with a caulking terminal having a saw-like tooth portion inside in a state where a plurality of windings are twisted together. Positioning for swaging can be facilitated. In addition, since each winding appears almost evenly on the surface by twisting the windings, all the windings are evenly swaged to make electrical contact with the saw-shaped teeth formed inside the terminal, and the connection of each winding Can be performed reliably.

According to the third aspect of the present invention, since the connecting portion is caulked at a plurality of locations by the plurality of caulking terminals, the connection can be reliably performed. According to the invention described in claim 4, the locking portion has a protrusion protruding in the radial direction, and the caulking terminal is provided with a hole at the tip of the terminal to engage with the protrusion. The mounting operation can be performed, and the locking can be reliably performed.

According to the fifth aspect of the present invention, the outer flange is provided with a drawing groove for locking a part of the winding between the groove and the locking portion. Projection in the radial direction can be prevented.

In the invention described in claim 6, the drawing groove portion is provided with an insulating piece having cuts on both sides and a groove portion for locking a part of the winding at a tip portion of the insulating piece. Therefore, the variation in the length of the winding can be absorbed and the locking of the connection portion can be further strengthened.

[0017]

FIG. 1 is a perspective view showing a stator 10 of an electric motor according to a first embodiment of the present invention. The stator 10 is configured by combining a magnetic pole core 20 as shown in FIG. 3A, a bobbin 30 as shown in FIG. 2, and a yoke core 40 as shown in FIG. 3B. ing. In FIG. 1, reference numeral 51 denotes a lead wire on the end side of the winding 50.

The magnetic pole core 20 has an annular connecting portion 21 and a plurality of magnetic pole teeth 22 radially extending outward from the connecting portion 21. The bobbin (insulating member) 30 has a fitting portion 31 made of an elastic synthetic resin.
, The inner flange portion 32 and the outer flange portion 33 are integrally formed. The fitting portion 31 is fitted to the magnetic pole teeth 22, and a winding 50 is wound around the outer periphery thereof as shown in FIG.

At the axial end of the outer flange 33, there is formed an L-shaped groove for drawing out a winding 33a, and a storage portion 33b spaced circumferentially from the groove for drawing out the winding 33a. 3
3b, as shown in FIG. 2 (c), a connecting portion 5 described later.
In order to prevent 3 from coming off, a come-off prevention protrusion 33c is formed.

The inner periphery of the yoke core 40 is configured to contact the outer flange 33 of the bobbin 30. The stator 10 thus configured is assembled as shown in FIGS. 4A to 4F, FIGS. 5A and 5B, and FIGS. 6A and 6B. Do. That is, as shown in FIG.
0 is wound around the fitting portion 31 of the bobbin 30 a predetermined number of times. Then, as shown in FIG. 4A, the fitting portion 31 is inserted into each magnetic pole tooth 22 of the magnetic pole core 20. Next, as shown in FIG. 4B, the bobbin 30 on which each winding 50 is wound.
At the same time, the magnetic pole core 20 is fitted to the yoke core 40.

Next, as shown in FIG.
The ends 52 of the lead wires 51 are put together and hooked on a winding lead groove 33a formed on one bobbin 30. And
As shown in FIG. 4D and FIG. 6, the end portion 52 is twisted, the tip is trimmed, and the connection portion 53 is formed by caulking with the caulking terminal 60.

The caulking terminal 60 has a curved plate-shaped terminal body 61 and a saw-shaped tooth portion 62 formed on the inner surface of the terminal body 61. Thereafter, as shown in FIG. 4E, the lead wire 51 is wound along the outer wall surface of the outer flange 33 with the winding lead groove 33a as a fulcrum. Then, as shown in FIG.
Store in b. Thereby, the fixing and insulation of the connection part 53 are completed.

As described above, in the stator 10 according to the first embodiment, after the lead wire 51 of the winding 50 is drawn out in the diameter method of the stator 10 and locked in the winding drawing groove 33a, To make a torsion and electrical connection at end 52,
The positioning of the work is easy, and the work itself is easy. Further, the lead wire 51 is connected to the winding lead groove 33a.
While wrapping around the outer wall surface of the outer flange 33 with the fulcrum as a fulcrum,
The fixing and insulation of the connection portion 53 can be reliably performed by a simple operation simply by storing the connection portion 53 in the storage portion 33b. Further, the protrusion of the lead wire 51 in the radial direction of the stator 10 can be prevented.

On the other hand, since the connecting portion 53 is caulked after the end portion 52 is twisted, positioning at the time of caulking the end portion 52 can be facilitated. Further, since each of the lead wires 51 can be substantially uniformly exposed on the surface by twisting the lead wire 51, when the swaging terminal 60 is swaged, all the lead wires 51 are formed evenly inside the terminal main body 61. Since it comes into electrical contact with the saw-like tooth portion 62, the respective lead wires 51 can be reliably electrically connected to each other. The winding 50
Irrespective of the wire diameter or the number of wires, the connection portion 53 can be securely stored.

FIG. 7 is a diagram showing a modification of the first embodiment. That is, at the connecting portion 53, the two caulking terminals 60 are used to caulk at two places. This is for the following reasons. That is, when the diameter of the windings 50 is large or the number of windings is large, when the windings 50 are twisted, the ratio of each winding 50 exposed to the surface for a certain length decreases.

On the other hand, the length of the terminal main body 61 of the caulking terminal 60 cannot be too long due to restrictions on its shape, caulking method, and the like. Therefore, by using a plurality of the caulking terminals 60, the electrical contact area between the caulking terminal 60 and each winding 50 can be increased. Therefore, the electrical connection between each lead wire 51 and the caulking terminal 60 can be further ensured.

FIG. 8 is a view showing a bobbin 70 incorporated in a stator 10A according to a second embodiment of the present invention. The configuration of the stator 10A is the same as that of the stator 10 except that the bobbin 70 is used instead of the bobbin 30.
The description of the other parts is omitted.

The bobbin (insulating member) 70 has a fitting portion 71, an inner flange 72, and an outer flange 73 integrally formed of an elastic synthetic resin. The fitting portion 71 fits the magnetic pole teeth 22.

Then, as shown in FIG.
An L-shaped winding lead-out groove 73a is formed at an axial end of the locking member 7 so as to be circumferentially separated from the winding lead-out groove 73a.
3b are formed. The locking portion 73b includes a columnar terminal engaging portion 74a, a terminal removal preventing protrusion 74b formed on an outer peripheral portion of the terminal engaging portion 74a, and a terminal engaging portion 74a.
And a conical tip 74c for facilitating insertion of a hole 83 described later.

On the other hand, reference numeral 80 in FIG. 10 denotes a caulking terminal applied to the second embodiment. Caulking terminal 80
Is a curved plate-shaped terminal main body 81, a saw-shaped tooth portion 82 provided on the inner peripheral side of the terminal main body 81, and a hole formed integrally with the terminal main body 81 and engaged with the terminal engaging portion 74a. 83.

In the thus configured stator 10A,
As shown in FIG. 11, after the lead wire 51 is hooked on the winding lead-out groove 73 a in the same manner as in the above-described stator 10, the torsion and the tip are trimmed and swaged with the swage terminal 80.

Thereafter, as shown in FIG. 11B, the lead wire 51 is connected to the outer flange portion 7 with the winding lead groove 73a as a fulcrum.
3, and the caulking terminal 80 is locked to the locking portion 73b.

The same effect as that of the stator 10 according to the first embodiment can be obtained in the stator 10A. FIG. 12 is a view showing a bobbin 30A incorporated in a stator 10B according to a third embodiment of the present invention. In this embodiment, the same reference numerals are given to the same functional portions as those of the stator 10 according to the above-described first embodiment, and the detailed description thereof will be omitted. The bobbin 30A is different from the bobbin 30 in that a plurality of grooves 34 are provided between the winding drawing groove 33a and the storage portion 33b. Note that 34a in FIG. 12B indicates a projection.

In the stator 10B constructed as described above, as shown in FIGS. 13 (a) to 13 (c), the lead wire 51 is drawn out from the winding lead-out groove 33a, and is electrically connected. Is wound around the outer peripheral wall of the outer flange portion 33. Then, a part of the lead wire 51 is once engaged with the groove 34 as shown in FIG. Further, the connection portion 53 is locked to the storage portion 33b. As a result, the lead wire does not protrude to the outer diameter side of the stator, does not contact metal parts and the like, and does not cause insulation failure, so that a highly reliable electric motor stator can be obtained.

FIG. 15 is a view showing a bobbin 70A incorporated in a stator 10C according to a fourth embodiment of the present invention. Note that, in this embodiment, the same reference numerals are given to the same functional portions as those of the bobbin 70 shown in the above-described second embodiment, and the detailed description thereof will be omitted. The bobbin 70A is different from the bobbin 70 in that a winding drawing groove 74 is provided instead of the winding drawing groove 73a.

The groove 74 for pulling out the winding is provided with cuts 7 on both sides.
5 is provided, and a groove 76a provided at the tip of the insulating piece 76. The stator 10C configured in this manner is shown in FIGS.
After the lead wire 51 is pulled out from the winding lead-out groove 74 to form the connection part 53 as shown in FIG.
Is engaged with the lead wire 51. Next, while the lead wire 51 is wound around the outer peripheral wall of the outer flange portion 73, the hole portion 83 of the terminal 80 is locked to the locking portion 73b. At this time, cuts 75 are provided at both ends of the insulating piece 76 and the bobbin 70
Since A is made of a synthetic resin material having elasticity, the insulating piece 76 is on the inside as shown in FIG. 17, and a tension is applied to the fixed lead wire 51 so as to pull it back. Thereby, a slight variation in the length of the lead wire 51 can be absorbed.
Furthermore, it can be wound around the outer flange portion 73 without any gap, and the tip of the connection portion 53 can be more securely prevented from coming off.

According to the stator 10C according to the fourth embodiment, the same effects as those of the stator 10 according to the above-described first embodiment can be obtained, and the variation in the length of the lead wire 51 can be absorbed. At the same time, the fixing of the connecting portion 53 can be further strengthened. It should be noted that the present invention is not limited to the embodiments, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0038]

According to the first aspect of the present invention, the end of the winding is wound around the outer flange with the groove provided in the outer flange of the insulating member as a fulcrum, and the connecting portion is locked. Can be locked. For this reason, the end part side of a winding can be easily fixed to an outer side flange part, and electrical insulation can be ensured.

According to the second aspect of the present invention, the connecting portion is formed by caulking with a caulking terminal having a saw-like tooth portion inside in a state where a plurality of windings are collectively twisted. Therefore, positioning when caulking can be easily performed. In addition, since each winding appears almost evenly on the surface by twisting the windings, all the windings are evenly swaged to make electrical contact with the saw-shaped teeth formed inside the terminal, and the connection of each winding Can be performed reliably.

According to the third aspect of the present invention, since the connecting portion is caulked at a plurality of locations by the plurality of caulking terminals, the connection can be reliably performed. According to the invention as set forth in claim 4, the locking portion has the protrusion protruding in the radial direction, and the caulking terminal is provided with a hole that engages with the protrusion at the terminal end. The mounting operation can be easily performed, and the locking operation can be reliably performed.

According to the fifth aspect of the present invention, the outer flange portion is provided with a drawing groove portion for locking a part of the winding between the groove portion and the locking portion. The protrusion of the wire in the radial direction can be prevented.

According to the sixth aspect of the present invention, the drawing groove portion is provided with an insulating piece having cuts on both sides, and a groove portion for locking a part of the winding at a tip portion of the insulating piece. As a result, the variation in the length of the winding can be absorbed, and the locking of the connection portion can be further strengthened.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a stator of an electric motor according to a first embodiment of the present invention.

FIG. 2 is a view showing a bobbin incorporated in the stator, wherein (a) is a plan view, (b) is a front view, and (c) is (a).
Sectional drawing cut | disconnected by the AA line in FIG.

FIG. 3 is a perspective view showing a magnetic pole core and a yoke core incorporated in the stator.

FIG. 4 is a perspective view showing an assembly process of the stator.

FIGS. 5A and 5B are diagrams showing a state in which a winding is wound around the bobbin, wherein FIG. 5A is a plan view and FIG.

FIG. 6 is an exemplary perspective view showing a step of assembling a connection portion incorporated in the stator;

FIG. 7 is a perspective view showing a modification of the stator.

FIG. 8 is a view showing a bobbin incorporated in a stator of the electric motor according to the second embodiment of the present invention, wherein (a) is a plan view and (b) is a front view.

FIG. 9 is an enlarged view of a main part of the bobbin, in which (a) is a plan view and (b) is a front view.

FIG. 10 is a view showing a caulking terminal incorporated in a connection portion applied to the stator.

FIG. 11 is a perspective view showing an assembling method of the stator.

FIG. 12 is a view showing a main part of a bobbin incorporated in a stator of an electric motor according to a third embodiment of the present invention.

FIG. 13 is a perspective view showing a method of assembling the stator.

FIG. 14 is an enlarged view of a main part of the stator.

FIG. 15 is a view showing a main part of a bobbin incorporated in a stator of an electric motor according to a third embodiment of the present invention.

FIG. 16 is a perspective view showing a method of assembling the stator.

FIG. 17 is an enlarged view of a main part of the stator.

FIG. 18 is a perspective view showing a stator of a conventional electric motor.

[Explanation of symbols]

 10, 10A, 10B, 10C ... stator 20 ... magnetic pole iron 30, 30A, 70, 70A ... bobbin 40 ... yoke iron core 50 ... winding

Claims (6)

[Claims] An electric motor comprising a yoke core and a magnetic pole part core having a plurality of magnetic pole teeth, wherein an insulating member having a winding wound around the magnetic pole teeth of the magnetic pole part core is inserted. In the stator, the insulating member includes a fitting portion on which a winding is wound and which is inserted and fitted into the magnetic pole teeth, an outer flange provided outside the fitting portion, and an outer flange. A groove, which guides the end side of the winding, and a connection part which is provided in the circumferential direction with respect to the groove of the outer flange, and electrically connects a terminal of the winding. And a locking portion for locking the motor. 2. The connecting part is formed by crimping a plurality of windings together in a twisted state with a crimping terminal having serrated teeth inside. 2. The stator of the electric motor according to 1. 3. The stator for an electric motor according to claim 2, wherein the connection portion is caulked at a plurality of locations by a plurality of the caulking terminals. 4. The locking portion has a projection projecting in a radial direction, and the caulking terminal is provided with a hole at the tip of the terminal for engaging with the projection. Item 3. An electric motor stator according to item 2. 5. The drawing device according to claim 1, wherein the outer flange is provided with a drawing groove for locking a part of the winding between the groove and the locking portion. Motor stator as described. 6. The drawing groove part is provided with an insulating piece having cuts on both sides, and a groove part for locking a part of the winding at a tip portion of the insulating piece. Item 6. An electric motor stator according to item 5.