JPH11234940A - Stator for motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which makes it possible to use the same parts for a plurality of coil windings different in wire diameter, is excellent in workability and allows optimum electrical connection to be performed with reliability without break. SOLUTION: The stator for motors is provided with a stator core 1 formed by laminating electromagnetic steel plates, a coil 2 wound around the stator core 1, an insulating terminal block 3 installed at an end of the stator core 1, a projected connection housing 4 formed on the terminal block 3, and connection terminals 6 inserted into the connection housing 4. The connection terminals 6 are provided with a winding holding groove 7 for holding the end 5 of the coil 2 and a press bonding projection 8 for press bonding the end 5 of the coil 2 to the winding holding groove 7. The press bonding projection 8 is folded to electrically connect the end 5 of the coil 2 with the connection terminals 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor stator, and more particularly to a connection terminal.

[0002]

2. Description of the Related Art FIG.
No. 6 is a front view showing a conventional motor stator, FIG. 17 is a side view of the motor stator, and FIG. 18 is a perspective view showing a main part of the motor stator. In the figure, 1 is a stator core formed by laminating electromagnetic steel sheets, 2 is a stator core 1
Is an insulating terminal block formed of synthetic resin provided on the end face of the stator core 1. 4 is a rectangular cylindrical connection housing projecting from the surface of the terminal block 3;
Is a coil winding end, and 19 is a winding holding groove formed in the connection housing 4. The winding holding groove 19 is formed by a continuous surface of an entrance surface 19a of the end portion 5 of the winding coil, a tapered surface 19b for a thick wire, and a tapered surface 19c for a thin wire. 2
Reference numeral 0 denotes a metal connection terminal, and reference numeral 20a denotes a terminal groove provided in the connection terminal 20.

Next, the end processing of the coil winding will be described. The end 5 of the coil 2 wound around the stator core 1 is held by the tapered surface 19b or 19c of the winding holding groove 19 of the connection housing 4. When the connection terminal 20 is inserted, the end portion 5 of the coil winding enters the terminal groove 20a, and electrical connection with the end portion 5 of the coil winding is made. Thereby, the terminal block 3 could be used as a common component for a plurality of windings having different coil winding wire diameters.

[0004]

However, the above-mentioned conventional motor stator has the following problems. In the conventional configuration, it is difficult to determine the dimensions of the tapered surfaces 19b and 19c with a molded product made of synthetic resin in order to retain the coil diameters of various coil windings and the degree of hardness of the coil winding. There is a possibility that the connection housing 4 made of synthetic resin may be deformed or fall down due to the force generated when the insulating coating (copper wire in the case of a thick wire) of the end portion 5 of the coil winding bites into the terminal groove 20a. Further, since the width of the terminal groove 20a is constant, the conductive area of the coil winding is the same whether the wire is a thin wire or a thick wire.

[0005] Further, since the holding and maintenance of the terminal portion of the coil winding is carried out between two parts, the fitting property and the workability are not sufficiently satisfactory.

The motor stator according to the present invention has been made in order to solve the above-mentioned problems, and common parts can be used for a plurality of coil windings having different wire diameters, workability is good, and It is an object of the present invention to provide a device capable of reliably performing optimal electrical connection without disconnection.

[0007]

A stator for an electric motor according to the present invention is provided on a stator core formed by laminating electromagnetic steel sheets, a coil wound on the stator core, and an end face of the stator core. Provided with an insulating terminal block provided, a connection housing projecting from the terminal block, and a connection terminal inserted into the connection housing, wherein the connection terminal holds an end of the coil. A winding holding groove and a pressure contact portion for pressing the end of the coil against the winding holding groove, and bending the pressure contact portion to bring the end of the coil into an electrically conductive state with the connection terminal. To keep.

Further, the connection terminal is formed by insert molding together with the stator core, the terminal block, and the connection housing.

The winding holding groove is formed in a substantially V-shape so that the depth of the winding holding groove is deeper than the maximum diameter of the end of the coil and the inner width of the bottom is equal to the minimum diameter of the end. .

Further, the winding holding groove is provided so as to open toward the side of the connection terminal.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which a connection terminal of a motor stator according to a first embodiment of the present invention and a connection housing are electrically connected, and FIG. 2 shows a state in which the connection terminal is inserted into the connection housing. FIG. 3 is a perspective view showing a state after the connection terminal is inserted, and FIG.
Is a front view of the motor stator, and FIG. 5 is a side view of the motor stator. In the figure, 1 is a stator core, 2 is a coil wound on the stator core 1, and 3 is an insulating terminal block provided on an end face of the stator core 1 and made of synthetic resin or the like. Reference numeral 4 denotes an insulating connection housing integrally formed with the terminal block 3 on the surface of the terminal block 3. The connection housing 4 has a rectangular cylindrical shape, and has a recess 4a formed therein for holding and fixing a connection terminal described later. 5 is an end of the coil winding, 6 is a metallic connection terminal, and a wall 6a is formed at an opposing position. Reference numeral 6b denotes a connection portion of the connection terminal 6. Reference numeral 7 denotes a V-shaped winding holding groove formed on the wall 6a of the connection terminal 6 and fixing the end 5 of the coil winding.
Is the inner width at the top of the winding holding groove 7, and 7b is the inner width at the bottom. The winding holding groove 7 is deeper than the maximum diameter of the coil winding to be used, the inner width 7b is equal to the minimum diameter excluding the insulating film of the coil winding, and the inner width 7a is increased from the inner width 7b toward the top. It is formed in a substantially V-shape so as to be substantially equal to the maximum diameter of the winding.

Reference numeral 8 denotes an air cylinder device to be described later, which is a projection for pressing the coil winding end portion 5 against the winding holding groove 7, and 9 is a concave portion when the connection terminal 6 is inserted into the connection housing 4. The fixing protrusions 10 that are fitted with 4a are holding portions that fix the pressure contact protrusions 8 provided on the wall 6a of the connection terminal 6. Reference numeral 11 denotes an air cylinder device.
The connection terminal 6 includes a wall portion 6a, a connection portion 6b, a winding holding groove 7, a press contact protrusion 8, a fixing protrusion 9, and a holding portion 10. When the connection terminal 6 is developed, the wall portion 6a is connected. Part 6
b, the pressing projection 8 is formed in a cross shape.

Next, the end processing of the coil winding will be described. First, as shown in FIG. 2, when the connection terminal 6 is inserted into the connection housing 4, the fixing projection 9 is fitted into the recess 4 a in the connection housing 4, and the connection terminal 6 is fixed to the connection housing 4. Next, the end 5 of the coil winding wound around the stator core 1 by an automatic winding machine (not shown) is shown in FIG.
As shown in (1), the connection terminal 6 is inserted into and held in the winding holding groove 7 formed in the wall 6a. Then, in this state, FIG.
The pressing projection 8 is bent in the direction of the arrow shown in FIG. At this time, the end portion 5 of the coil winding bites into the winding holding groove 7 by about 20% to 40% of the cross-sectional area of the end portion 5 so as to be pressed and held in an electrically conductive state.

According to the first embodiment, the end 5 of the coil winding is held in the V-shaped winding holding groove 7 in the wall 6a of the connection terminal 6, and the coil winding used is It is bent and pressed and held in an electrically conductive state by the pressure contact projection 8 according to the wire diameter. Therefore, a common component can be used for a plurality of coil windings having different wire diameters, and optimal electrical connection can be performed without disconnection.

Embodiment 2 FIG. 6 is a perspective view showing connection terminals of a stator for an electric motor according to Embodiment 2 of the present invention, and shows a state in which the connection terminals formed by insert molding hold the ends of the coil windings. FIG. 7 is a perspective view of the connection terminal showing a state after the electrical connection has been made. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the figure, reference numeral 12 denotes a metal connection terminal, which is integrally formed with a metal stator core 1, an insulator terminal block 3, and an insulator connection housing 4.

After the connection terminal 12 is insert-molded, the end 5 of the coil winding wound around the stator core 1 by an automatic winding machine (not shown) as shown in FIG. The connection terminal 12 is inserted and held in the winding holding groove 7 formed in the V-shape in the wall 6a of the connection terminal 12. Then, in this state, the pressure contact projection 8 is bent in the direction of the arrow shown in FIG. 6 by the air cylinder device 11, and the end 5 of the coil winding is inserted into the winding holding groove 7 by 20% to 40% of the sectional area of the end 5. %, And is pressed and held in an electrically conductive state.

According to the second embodiment, the same effects as those of the first embodiment can be obtained, and the step of inserting the connection terminal can be omitted by insert molding, the automatic winding step can be smoothly performed from the molding, and the bending by the air cylinder device. Until the process,
The motor stator core can be completely automated.

Embodiment 3 FIG. 8 is a perspective view showing connection terminals of a motor stator according to a third embodiment of the present invention.
FIG. 4 is a perspective view showing a state in which the pressing projection is bent. In the first or second embodiment described above, the case where the pressure contact convex portion is bent between the wall portions on which the winding holding grooves of the connection terminal are formed has been described. However, in the present embodiment, the pressure contact protrusion is formed so as to cover the entire connection terminal. Forming projections. In the figure, the first embodiment
Alternatively, the same reference numerals are given to the same portions as 2 and the description is omitted. Reference numeral 13 denotes a pressure contact protrusion integrally formed with the connection terminal 6. The pressure contact protrusion 13 has an opening 13 a into which the upper part of the wall 6 a of the connection terminal 6 is inserted.

After fixing the connection terminal 6 to the connection housing 4 as in the first embodiment, the end 5 of the coil winding is inserted into the winding holding groove 7 and held. Then, the press-contact protrusion 13 is bent by the air cylinder device 11, and the upper portion of the wall 6 a of the connection terminal 6 is inserted into an opening 13 a formed in the press-contact protrusion 13. As in the first embodiment, the end portion 5 of the coil winding bites into the winding holding groove 7 by about 20% to 40% of the sectional area of the end portion 5 and is pressed and held in an electrically conductive state.

According to the third embodiment, not only the same effects as in the first embodiment are obtained, but also the entire surface of the end portion of the coil winding straddling between the wall portions of the connection terminal when bending the press-contacting convex portion. Can be pressed, and a stable force can be applied to the ends of the coil windings to press and hold in an electrically conductive state.

Embodiment 4 FIG. FIG. 10 is a perspective view showing connection terminals of a motor stator according to Embodiment 4 of the present invention. In the drawings, the same or corresponding portions as those in the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 14 denotes a press-contacting convex portion formed integrally with the connection terminal 6, and the opening 1
4a are formed. The pressure contact convex portion 14 is formed so as to cover the connection terminal 6, and an upper portion of the wall portion 6a of the connection terminal 6 is inserted into the opening 14a. Reference numeral 15 denotes a convex portion for pressing.
The bent portion formed on the side of the coil winding contacts the pressing end 14 of the coil winding when the projection 14 is bent.

According to the fourth embodiment, when the pressure contact convex portion is bent by the air cylinder device, not only the entire end of the coil winding is pushed but also the coil is formed by the bent portion provided on the pressure contact convex portion. Since the end of the winding is pressed to increase the pull-out strength, it can be securely pressed and held in an electrically conductive state.

Embodiment 5 11 and 12 are perspective views showing connection terminals of a motor stator according to Embodiment 5 of the present invention. In the above-described first to fourth embodiments, the roles of the connection terminal and the press-contact protrusion are different, but in this embodiment, the press-contact protrusions 8, 13, and 14 shown in the first to fourth embodiments are different.
14 shows a case where the connection portion 6b is formed. For example, FIG.
1 has a connecting portion 6b connected to the pressure contact convex portion 8 shown in the second embodiment.
Is shown. FIG. 12 shows a configuration in which the shape of the press-contact protrusion shown in FIG. 11 is replaced with the shape of the press-contact protrusion 13 shown in the third embodiment. Although FIGS. 11 and 12 show the second embodiment, it is needless to say that the present invention is not limited to this, and a connection portion may be provided on the press-contacting protrusion shown in the first to fourth embodiments.

According to the fifth embodiment, since the connection portion is formed on the press-contacting convex portion, not only the effects of the first to fourth embodiments can be achieved, but also the amount of component material used can be reduced.
Cost can be reduced.

Embodiment 6 FIG. FIG. 13 is a perspective view showing connection terminals of a motor stator according to Embodiment 6 of the present invention. In the above-described first to fifth embodiments, the case where the winding holding groove is opened upward and the end portion of the coil winding is held, and then the press-contacting convex portion is bent and electrically connected is shown.
In the sixth embodiment, a case where a winding holding groove is provided on a side surface of a connection terminal in each of the above-described embodiments will be described. In the drawings, the same or corresponding portions as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 16 denotes a connection terminal, 16a denotes a wall portion of the connection terminal 16, and 16b denotes a connection portion of the connection terminal 16. 17 is a wall portion 16a of the connection terminal 16
And is open in the side surface direction of the wall portion 16a. Reference numeral 18 denotes a press contact convex portion,
6 and are integrally formed. The press contact projection 18 is formed so as to press the end 5 from the opening side of the winding holding groove 17.

The press contact projection 18 is formed in an electrically conductive state by, for example, making the end 5 of the coil winding bite into the winding holding groove 17 by about 20% to 40% of the sectional area of the end 5 by an air cylinder device. Press and hold on.

According to the sixth embodiment, not only the same effects as in the first embodiment can be obtained, but also the lifting of the end portion of the winding coil can be prevented. That is, as shown in FIGS. 14 and 15, when the opening direction of the winding holding groove and the winding direction wound around the stator core are the same direction, the end of the coil winding held in the winding holding groove is Has elasticity in the winding direction, so if the opening direction of the winding holding groove is open upward, it will be easy to come off and it will be necessary to hold down by hand until it is fixed, reducing workability There was a possibility of doing it. However, the direction in which the opening direction of the winding holding groove is orthogonal to the winding direction wound around the stator core, that is,
By providing a winding holding groove on the side surface of the connection terminal, it is possible to prevent the end of the coil from rising, and the winding end does not jump out of the groove due to elasticity in the winding direction,
The end of the coil can be easily fixed by the holding portion.

[0028]

According to the motor stator of the present invention, the end of the coil is held in an electrically conductive state with the connection terminal by bending the press contact portion, so that a common coil is used for a plurality of coils having different wire diameters. Parts can be used and optimal electrical connection can be ensured without breaking.

Further, since the connection terminals are formed by insert molding together with the stator core, the terminal block and the connection housing, the steps from molding to winding and electrical connection can be completely automated.

Further, since the wire holding groove formed in the connection terminal is formed in a substantially V-shape, various wire diameters can be securely fixed in the groove, so that the connection terminal can cope with various wire diameters. Can be used as a part.

Further, since the winding holding groove is provided so as to open toward the side of the connection terminal, it is possible to prevent the end of the coil winding from rising.

[0032]

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a main part of a motor stator according to Embodiment 1 of the present invention.

FIG. 3 is a perspective view showing a main part of the motor stator according to the first embodiment of the present invention.

FIG. 4 is a front view of the electric motor stator according to the first embodiment of the present invention.

FIG. 5 is a side view of the electric motor stator according to the first embodiment of the present invention.

FIG. 6 is a perspective view showing a main part of a motor stator according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a main part of a motor stator according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing a main part of a motor stator according to a third embodiment of the present invention.

FIG. 9 is a perspective view showing a main part of a motor stator according to a third embodiment of the present invention.

FIG. 10 is a perspective view showing a main part of a motor stator according to a fourth embodiment of the present invention.

FIG. 11 is a perspective view showing a main part of an electric motor stator according to a fifth embodiment of the present invention.

FIG. 12 is a perspective view showing a main part of a motor stator according to a fifth embodiment of the present invention.

FIG. 13 is a perspective view illustrating a main part of a motor stator according to a sixth embodiment of the present invention.

FIG. 14 is an explanatory diagram showing a state of a connection terminal and a coil end according to the present invention.

FIG. 15 is an explanatory view showing the state of the connection terminal and the coil end according to the present invention.

FIG. 16 is a front view showing a conventional motor stator.

FIG. 17 is a side view showing a conventional motor stator.

FIG. 18 is a perspective view of a main part of a conventional motor stator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Stator core, 2 coils, 3 terminal blocks, 4 connection housings, 5 ends of coil windings, 6 connection terminals, 7
Winding holding groove, 8 crimping protrusion, 12 connection terminal, 13
Pressing projections, 14 Pressing projections, 16 Connection terminals, 17
Winding holding groove, 18 Pressure contact convex part.

Claims (4)

[Claims] A stator core formed by stacking electromagnetic steel sheets;
A coil wound around the stator core, an insulating terminal block provided on an end surface of the stator core, a connection housing protruding from the terminal block, and a connection terminal inserted into the connection housing. Wherein the connection terminal has a winding holding groove for holding an end of the coil, and a press contact portion for pressing the end of the coil to the winding holding groove, A stator for an electric motor, wherein an end of the coil is electrically connected to the connection terminal by bending a press-contact portion. 2. The electric motor stator according to claim 1, wherein said connection terminals are formed by insert molding together with said stator core, said terminal block, and said connection housing. 3. The coil winding groove is formed in a substantially V-shape such that the depth of the groove is deeper than the maximum diameter of the end of the coil, and the inner width of the bottom is equal to the minimum diameter of the end. The stator for an electric motor according to claim 1 or 2, wherein: 4. The winding holding groove according to claim 1, wherein the winding holding groove is provided so as to open toward a side portion of the connection terminal.
The stator for an electric motor according to any one of the above.