1. Field of the Invention
The present invention relates to a motor stator, in which a press contact type terminal is attached to a wiring receiver on the insulating member fitted to the axial end of a stator iron core, and end portions of a winding are connected to lead wires via the press contact type terminal.
2. Related Art
Conventional motor stator of this type is disclosed which is provided with a plurality of wiring receivers at spaced intervals on the same circumference of the axial end of an insulating member and the base end portion of a press contact type terminal is attached to each wiring receiver so that the end portions of the winding are fixed while the end portions of the winding are also electrically connected to the press contact type terminal, and furthermore, the end portions of the winding are connected to lead wires by attaching an annular terminal plate which contains lead wires in a groove formed in the circumferential direction onto the end surface of the insulating member from which the ends of press contact type terminals protrude (for example, refer to Japanese Patent Laid-Open No. 2001-314055).
The above mentioned motor stator has a problem of complicated process of attachment of lead wires to the stator, because it needs a process of drawing a conductor wire in circumferential direction while pushing it into the groove on the terminal plate, in addition to concentratedly winding the conductor wire around the pole teeth, and furthermore, the increased cost cannot be avoided due to the separate terminal plate from the motor stator main body.
The present invention has been made to solve the aforementioned problems and an object thereof is to facilitate the attachment of lead wire to the stator and to provide a motor stator capable of reducing cost.
To achieve the aforementioned objects, the invention according to claim 1 is characterized by providing a motor stator, wherein a frame-shaped insulating member is fitted to the axial end of a stator iron core having a plurality of pole teeth, the motor stator has a winding of a conductor wire concentratedly wound around each of the pole teeth with the insulating member therebetween, a wiring receiver is formed on the insulating member and the winding receiver has a recess in which an end portion of the winding can be inserted across an edge portion thereof, so that the end portion of the winding is fixed while also being electrically connected by attaching a press contact type terminal to the recess, and a lead wire terminal is coupled to the press contact type terminal to connect it with a lead wire, and wherein a winding start and a winding end of the winding are each fixed together while both the winding start and the winding end of the winding are also electrically connected to the press contact type terminal by inserting the winding start and the winding end of the winding of a single conductor wire in a single wiring receiver and attaching a single press contact type terminal to the wiring receiver.
The present invention can provide a motor stator which facilitates the attachment of lead wire to the stator and is capable of reducing cost by configuring it as mentioned above.
The insulating member 7 is provided with winding receivers 3 on the circumference thereof and further provided with flanges 18 each protruding axially at the circumferential edge corresponding to the circumferential end portion of the pole teeth A-F. Now, assuming that the backside and front side of the drawings are the lead wire side and non-lead wire side, respectively, the wiring receivers 3 are only provided on the lead wire side. And a single conductor wire is used to wind the windings 2, each having the same phase for the pole teeth A and D, pole teeth C and F, and pole teeth B and E.
Of those conductor wires, as seen from the one which is wound around the pole teeth A and D, a conductor wire whose winding start 10 of winding is inserted in the wiring receiver 3 on the lead wire side is led into the inside of the stator iron core 1 at the vicinity of the wiring receiver 3, guided to the non-lead wire side through a slot between the pole teeth D and E, and then led out of the stator iron core 1 at the end thereof.
Then, as shown with arrow X, it is drawn along the outer circumference of the insulating member 7 as a first crossover wire 12 to the slot position of the opposing pole teeth, led into the inside of the stator iron core 1, wound around the pole tooth A, and then led out of the stator iron core 1 at the end thereof on the non-lead wire side.
Then, as shown with arrow Y, it is drawn along the outer circumference of the insulating member 7 as a second crossover wire 13 to the slot position at the vicinity of the wiring receiver 3, led into the inside of the stator iron core 1, wound around the pole tooth D, and then led out of the stator iron core 1 at the end thereof on the lead wire side, such that the winding end 11 is inserted in the wiring receiver 3.
Similarly, the conductor wire wound around the pole teeth C and F is led out to the stator iron core 1 at the end thereof, through the slot between the pole teeth F and A, drawn along the outer circumference of the insulating member 7 as a first crossover wire to the position corresponding to the pole tooth C, led into the inside of the stator iron core 1, and further led out of the stator iron core 1 to the end thereof at the position corresponding to the pole tooth C, drawn along the outer circumference of the insulating member 7 as a second crossover wire to the position corresponding to the pole tooth F, and led into the inside of the stator iron core 1.
Similarly, the conductor wire wound around the pole teeth B and E is led out to the stator iron core 1 at the end thereof, through the slot between the pole teeth B and C, drawn along the outer circumference of the insulating member 7 as a first crossover wire to the position corresponding to the pole tooth E, led into the inside of the stator iron core 1, and further led out of the stator iron core 1 to the end thereof at the position corresponding to the pole tooth E, drawn along the outer circumference of the insulating member 7 as a second crossover wire to the position corresponding to the pole tooth B, and led into the inside of the stator iron core 1.
Here, the first crossover wire 12 of the conductor wire wound around the pole teeth A and D has the substantially same potential as that of the winding start 10 and the winding end 11, and one phase voltage of the three-phase power supply, for example U-phase voltage, is applied as it is.
Similarly, for the first crossover wire of the conductor wire wound around the pole teeth C and F, one phase voltage of the three-phase power supply, for example V-phase voltage, is applied as it is, and similarly, for the first crossover wire of the conductor wire wound around the pole teeth B and E, one phase voltage of the three-phase power supply, for example W-phase voltage, is applied as it is.
On the other hand, for the second crossover wire 13 of the conductor wire wound around the pole teeth A and D, the second crossover wire of the conductor wire wound around the pole teeth C and F, and the second crossover wire of the conductor wire wound around the pole teeth B and E, at least two of them are in crimp contact at the neutral crimp contact position 14 (three positions shown in the figure) to become a neutral point.
Therefore, the second crossover wire, located at predetermined intervals with respect to the first crossover wire, is spaced apart from the first crossover wire in axial direction, but located at the same level mutually.
Here the wiring receivers 3 are provided on the outer circumference of the insulating member 7 on the lead wire side. The wiring receiver 3 includes a groove 3a in which an end portion of the winding can be inserted across the radial edges and a recess 3b (refer to
In this configuration, the extremities are severed. The press contact type terminal 4 includes protrusion 4a which is axially protruding, and the connection between the winding 2 and the lead wire 9 is achieved by coupling the lead wire terminal 15 having the lead wire 9 in crimp contact with it to the protrusion 4a.
With reference to the
Next, it is drawn along the outer circumference of the insulator member 7 to the slot position of the opposing pole teeth, led into inside of the stator iron core, wound around the first pole teeth, and then led out of the stator iron core 1 at the end thereof on the non-lead wire side.
Then, it is drawn along the outer circumference of the insulator member 7 to the slot position in the vicinity of the wiring receiver, led into inside of the stator iron core, wound around the second pole tooth, and then led out of the stator iron core 1 at the end thereof on the lead wire side, resulting in that the end portion led out is inserted into the wiring receiver 3 as the winding end.
Thus, according to the first embodiment, fixing the ends of winding in conjunction with the winding process is possible, and after that, only the process for attaching the press contact type terminal 4 and coupling the lead wire terminal 15 is necessary, thereby eliminating the terminal plate described in the description of related art and also automating the process for forming lead wire, therefore the facilitation of the attachment of lead wire to the stator and reduction of the cost can be achieved.
Also, according to this embodiment, the first crossover wires are spaced at intervals from each other so as to prevent conductor wires with a large potential difference therebetween from being in contact with each other, therefore the reliability can be improved.
Furthermore, slot is configured to have a depressed portion at the middle in the circumferential direction so that conductor wire is inserted from the lead wire side to the non-lead wire side, thereby eliminating the interference with a nozzle and ensuring a good winding of the conductor.
In the first embodiment, the depressed portion of the slot 17 is provided only on the inner circumference of the insulating member 7, however it may lead the strength of the insulating member 7 to be reduced due to some extremely thinned portions.
Therefore, the projections can be provided on the outer circumference at the position where the depressed portions of slots 17 are formed so as to make the thickness of insulating member 7 even, and furthermore, depressed portions can also be provided on the stator iron core 1 itself for accommodating those projections, in order to ensure the strength and improve the reliability.
A motor stator according to the present invention contributes to facilitation of the process and reduction of the cost in manufacturing the stator of motor used for household electric appliance including air conditioner.
Number | Date | Country | Kind |
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2004-182606 | Jun 2004 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP05/10178 | 6/2/2005 | WO | 12/1/2006 |