JP2006180575A - Motor stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor stator in which a supporting portion is separated surely from a terminal receiving portion without cutting the outer side face of the terminal receiving portion together by means of a cutter at the time of simultaneous cutting of a winding and its supporting portion. <P>SOLUTION: The motor stator comprises a section for containing a compression terminal which connects a winding and a lead wire, a portion projecting from the outer side face of the terminal containing section and supporting the winding, and a recess provided in the outer side face below the supporting surface of the supporting portion wherein the winding penetrated the terminal containing section and supported by the supporting portion is cut simultaneously at the end portion and the supporting portion from the winding side by means of a cutter. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing an electric motor stator used for a hermetic compressor and the like, and more particularly to an electric motor stator having an improved structure of a terminal accommodating portion for accommodating a press contact terminal for connecting a winding and a lead wire.

  Conventionally, the end of the winding wound around the stator core and the neutral point of the lead wire or the winding are connected by the press contact terminal accommodated in the terminal receiving portion provided on the end face of the stator core. Such an electric motor stator is known (for example, Patent Document 1).

  When manufacturing an electric motor stator that is connected with such a pressure contact terminal, there is a step of cutting in order to make the winding end protruding from the outer surface of the terminal receiving portion the same surface as the outer surface.

As shown in FIGS. 10 (a) and 10 (b), the conventional terminal receiving portion 61 projects a support portion 61d that supports the end of the winding 3 on the outer surface 61a, and the cutting tool 8 The support portion 61d is cut at the same time. However, in the conventional terminal receiving portion 61, since the upper and lower outer surfaces 61a of the support portion 61d are the same surface, the winding tool 3 and the support portion 61d are cut by the cutting tool 8 due to variations in the positional relationship between the cutting tool 8 and each member. When cutting, the outer surface 61a is also shaved together, and the cut support part (cut piece) 61d is sent to a subsequent process while being attached to the terminal receiving part 61 as a thin sheet, and is directly sealed. There was a problem that was incorporated into the.
JP 2001-314055 A

  The present invention has been made in consideration of the above-described circumstances. When the winding and the supporting portion that supports the winding are simultaneously cut, the cutting tool does not cut the outer surface of the terminal receiving portion together, and the supporting portion is received by the terminal receiving portion. An object of the present invention is to provide an electric motor stator that is reliably separated from a section.

  In order to achieve the above-described object, an electric motor stator according to the present invention includes an end portion of a winding wound around a stator core and a lead wire or a neutral point of the winding on the end surface of the stator core. In the electric motor stator that is connected to the press contact terminal that is accommodated in the provided terminal receiving portion, the terminal receiving portion includes a terminal accommodating portion that accommodates the press contact terminal and an intermediate portion in the height direction of the terminal receiving portion. A support part that protrudes from the outer side surface and supports the winding, and a recess for escape is provided on the outer surface below the support surface of the support part, and passes through the terminal accommodating part and supported by the support part The end portion and the support portion are simultaneously cut from the winding side by a cutting tool.

  According to the electric motor stator of the present invention, when the winding and the support portion supporting the same are cut simultaneously, the cutting tool does not cut the outer surface of the terminal receiving portion together, and the supporting portion is reliably removed from the terminal receiving portion. It is possible to provide an electric motor stator that is separated from each other.

  Hereinafter, an electric motor stator according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a longitudinal sectional view of a hermetic compressor using an electric motor stator according to an embodiment of the present invention, and FIG. 2 is a plan view of the electric motor stator according to the present embodiment.

  As shown in FIG. 1, the hermetic compressor 21 includes a motor unit 23 that uses the motor stator 1 according to the present embodiment in a hermetic case 22, and a rotary unit that is rotationally driven by the motor unit 23 via a crankshaft 24. The compressor section 25 is accommodated. When power is supplied to the motor stator 1 via the cluster terminal 26 and the lead wire 4, the motor rotor 27 and the crankshaft 24 of the motor unit 23 rotate, and from the suction pipe 28 provided in the sealed case 22. The sucked refrigerant gas is compressed by the compressor unit 25 and discharged out of the sealed case 22 via the discharge pipe 29.

  As shown in FIG. 2, the electric motor stator 1 according to this embodiment includes a stator core 2, a winding 3 wound around the stator core 2, and the above-described outlet connected to the winding 3. Line 4 is provided.

  The stator core 2 is formed with, for example, six magnetic pole teeth (not shown) protruding on the inner surface of the cylindrical yoke portion, and an insulating material such as a synthetic material is formed on the axial end surface 2a of the stator core 2 including the magnetic pole teeth. A ring-shaped terminal board 5 made of resin is provided. Windings 3 are wound around the magnetic pole teeth. In the terminal plate 5, six terminal receiving portions 6 are arranged on the circumference corresponding to the windings 3 and are erected on the circumference.

  Each of these windings 3 has winding nozzles at positions where a winding machine (not shown) divides the circumferential direction into three equal parts, and these winding nozzles are driven so that the three magnetic poles on the right side of FIG. The terminal receiving portion 6 is arranged on the assumption that the winding 3 is wound around the teeth, and then the winding nozzle is rotated 180 degrees in the circumferential direction and the winding 3 is wound around the remaining three magnetic pole teeth. It is a thing. Moreover, the terminal of each coil | winding 3 is accommodated radially by forming all the coil | winding accommodation grooves 6a provided in the terminal receiving part 6 and accommodating the coil | winding 3 toward the radial direction outer side from the center.

  Further, the winding 3 and the lead wire 4 are connected by using the press contact terminal 7.

  As shown in FIG. 3, the press contact terminal 7 is made of metal, and the lead wire 4 is inserted into the lead wire press contact portion 7a at the upper part thereof so that the lead wire 4 and the winding 3 are orthogonal to each other. The U-shaped lead wire groove 7b whose opening width is gradually reduced is provided, and the U-shaped winding groove 7d whose opening width is gradually reduced by inserting the winding 3 into the winding pressure contact portion 7c at the bottom is provided at the bottom. It is provided orthogonal to the outgoing line groove 7b.

  As shown in FIGS. 4 to 6, the terminal receiving portion 6 has a vertically isosceles trapezoidal shape when viewed from the side. The terminal receiving portion 6 includes a pressure receiving terminal 7 and a winding accommodating portion 6 a for accommodating the winding 3, and a pressure welding. A rectangular engagement groove 6b provided in the radial direction of the winding accommodating portion 6a, which is used to engage the winding pressure contact portion 7c of the terminal 7 and attach the pressure contact terminal 7 to the terminal receiving portion 6; A supporting portion 6d that protrudes from the outer surface 6c of the terminal receiving portion 6 at the intermediate portion in the height direction of the terminal receiving portion 6 and supports the winding 3, and a lower side of the supporting surface 6d1 of the supporting portion 6d, for example, a lower surface of the supporting portion 6d An escape recess 6e having a depth (step difference with the outer surface 6c) of 0.1 mm or more is provided on the outer surface 6c below 6d2. In addition, as shown in FIG. 7, this recessed part 6e for escape may be extended to the side surface of the support part 6d, and may be provided in the outer side surface 6c below the support surface 6d1.

  Accordingly, as shown in FIG. 8, the press contact terminal 7 to which the winding 3 and the lead wire 4 are attached in the press contact state is accommodated in the terminal receiving portion 6 attached to the end face 2 a of the stator core 2, and the end face It is attached to 2a. In such an attached state, the winding 3 is wound by being bent inward in the axial direction along the inner peripheral surface of the winding 3 through the winding accommodating portion 6a and drawn into the inner peripheral side of the terminal receiving portion 6. The end portion of the winding 3 is flush with the outer surface 6c of the support portion 6d, does not protrude from the outer surface 6c, and the cut support portion 6d (cut piece) is a thin sheet and receives the terminal. The outer surface 6c is in a clean state without being attached to the portion 6.

  A method for manufacturing the motor stator having the above structure will be described.

  As shown in FIGS. 9A and 9B, the terminal plate 5 is attached to the end surface 2a of the stator core 2, the terminal receiving portion 6 is provided on the end surface 2a, and the winding 3 passes through the winding housing portion 6a. And are supported by the support portion 6d. Further, although shown in FIG. 8 and not shown in FIG. 9, the press contact terminal 7 is inserted from the winding press contact portion 7c into the winding housing portion 6a which also serves as the press contact terminal housing portion, and the winding 3 is inserted into the winding groove 7d. The winding pressure contact portion 7 c is press-fitted into the engagement groove 6 b and the pressure contact terminal 7 is attached to the terminal receiving portion 6. In the process of press-fitting the winding 3 into the winding groove 7d, the winding groove 7d scrapes the insulation coating of the winding 3, and the press contact terminal 7 and the winding start winding 3 are electrically connected.

  Further, the lead wire 4 is inserted into the lead wire groove 7b and pressed to similarly connect the press contact terminal 7 and the lead wire 4 electrically.

  Thereafter, the cutting tool 8 having a width W2 smaller than the width W1 of the escape recess 6e is lowered along the outer surface 6c, and the support portion 6d is cut simultaneously with the winding 3.

  Thereby, the edge part of the coil | winding 3 and the support part 6d become the same surface as the outer surface 6c.

  In the simultaneous cutting process of the winding 3 and the support portion 6d, the outer surface 6c is provided with the escape recess 6e wider than the width of the cutting tool 8, so that the cutting tool 8 cuts the outer surface 6c together. Instead, the support portion 6d is reliably separated from the terminal receiving portion 6.

  As a result, even if the electric motor stator according to the present embodiment is incorporated in a hermetic compressor 11 as shown in FIG. 1 and used, the cut piece is not brought into the sealed case 2 and a failure caused by the cut piece is caused. Can be prevented, and the reliability of the hermetic compressor can be improved.

1 is a longitudinal sectional view of a hermetic compressor in which an electric motor stator according to an embodiment of the present invention is used. The top view of the electric motor stator which concerns on one Embodiment of this invention. The perspective view of the press-contact terminal used for the electric motor stator which concerns on one Embodiment of this invention. The top view of the terminal receiving part used for the electric motor stator which concerns on one Embodiment of this invention. Sectional drawing which follows the YY line | wire of the terminal receiving part used for the electric motor stator which concerns on one Embodiment of this invention. Sectional drawing which follows the XX line of the terminal receiving part used for the electric motor stator which concerns on one Embodiment of this invention. The top view of embodiment other than the terminal receiving part used for the electric motor stator which concerns on this invention. The longitudinal cross-sectional view which shows the state which attached the press-contact terminal used for the electric motor stator which concerns on one Embodiment of this invention to the terminal receiving part. (A), (b) is explanatory drawing which shows the manufacturing method of the electric motor stator which concerns on one Embodiment of this invention. (A), (b) is explanatory drawing which shows the manufacturing method of the conventional motor stator.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Electric motor stator, 2 ... Stator iron core 2a ... End surface, 3 ... Winding, 4 ... Lead wire, 5 ... Terminal board, 6 ... Terminal receiving part, 6a ... Winding accommodating part, 6b ... Engagement groove, 6c ... outer side surface, 6d ... support portion, 6d1 ... support surface, 6d2 ... lower side surface, 6e ... recessed recess, 7 ... pressure contact terminal.

Claims (1)

The end of the winding wound around the stator core and the neutral point of the lead wire or winding are connected with the press contact terminal accommodated in the terminal receiving portion provided on the end face of the stator core. In the electric motor stator, the terminal receiving portion includes a terminal receiving portion that receives the press contact terminal, a support portion that protrudes from an outer surface of the terminal receiving portion in the height direction intermediate portion, and supports the windings. The winding portion provided with a relief recess on the outer surface below the support surface and penetrating the terminal accommodating portion and supported by the support portion has an end portion and the support portion cut from the winding side from the cutting tool. An electric motor stator characterized in that it is cut at the same time.

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