JP2005184889A - Wedge inserter - Google Patents

Abstract

To provide a wedge insertion device capable of easily inserting a wedge into a slot in which a coil wire has already been wound without buckling deformation.
A wedge insertion device (10) is a device for inserting a wedge (5) into an opening in an upper part of a slot in which a coil wire has already been wound in a stator. The wedge insertion device (10) restrains the entire outer peripheral surface of the wedge (5) and pivots the wedge (5) on the shaft. A body member 11 having a through-hole 12 that is held so as to be movable in a direction, and a movable member 14 that has a pressing portion 15 that can move the through-hole 12 and press the end of the wedge 5. When the end of the wedge 12 inserted into the through hole 12 is pressed in the longitudinal direction by the pressing portion 15, the wedge 5 is guided in the longitudinal direction in the through hole 12, and the wedge 5 is inserted into the through hole. Extruded from 12 extrusion ports 12a.
[Selection] Figure 3

Description

  The present invention relates to a wedge insertion device for inserting a wedge into a slot of a stator.

  An automatic wedge insertion device that automatically inserts a wedge into a slot of a stator used in a motor is known (see, for example, Patent Document 1). For example, in a trial manufacture of a motor, a slot in which a coil wire has already been wound. A wedge insertion operation is performed by so-called manual operation, in which the wedge insertion portion is visually confirmed, the wedge is held by hand, and the wedge is inserted and inserted.

However, this wedge is, for example, a thin body such as paper or a resin film, and in the slot in which the coil wire has already been wound, there is a gap so that the wedge between the coil wire and the tooth can be inserted. It is very narrow. Therefore, in the manual wedge insertion as described above, it is difficult to insert the wedge, or the wedge breaks in the middle of insertion and does not reach the opposite side of the slot. May be damaged and wasted.
JP 2002-325408 A

An object of the present invention is to provide a wedge insertion device capable of easily inserting a wedge into a slot in which a coil wire has already been wound without buckling deformation.
To achieve the above object, according to the present invention, there is provided a wedge insertion device for inserting a wedge into a gap between the coil wire and a tooth in a slot of a stator in which a coil wire has already been wound, A holding means for restraining the outer peripheral surface of the wedge and holding the wedge movably along the longitudinal direction; and a pressing means for pressing the end surface of the wedge held by the holding means in the longitudinal direction. A wedge insertion device is provided.

  In the present invention, in the wedge insertion device, when the pressing unit presses the end surface of the wedge in the longitudinal direction, the holding unit guides along the longitudinal direction while constraining the outer peripheral surface of the wedge. As the coil wire is already wound around the stator slot and the space between the coil wire and the teeth is very narrow, the wedge will be buckled and deformed. And can be easily inserted.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1A is a perspective view of a stator according to an embodiment of the present invention, FIG. 1B is a detailed cross-sectional view of an IB portion of FIG. 1A, and FIGS. 2A to 2C are embodiments of the present invention. It is a figure which shows the wedge insertion apparatus which concerns on a form, FIG. 2 (A) is the side view, FIG.2 (B) is the front view, FIG.2 (C) is the back view, FIG.3 is FIG.2 (B). FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a side view showing the positional relationship between the wedge insertion device and the slot according to the embodiment of the present invention. FIG. 6 is a perspective view showing a state in which the wedge is inserted using the wedge insertion device according to the embodiment of the present invention.

  First, the stator 1 of the motor into which the wedge 5 is inserted in the present embodiment will be described. As shown in FIG. 1A, the stator 1 has a cylindrical shape, and has a large number of slots on its inner peripheral surface. 2 are formed at substantially equal intervals along the circumferential direction. Each slot 2 extends in a substantially concave shape along the axial direction of the stator 1, and a coil wire 3 is wound at an appropriate position of the slot 2. In FIG. 1A, the coil wire 3 is wound only between the two slots 2, but in actuality, the coil wire 3 is wound around all the slots 2 in FIG. ing.

  Further, as shown in detail in FIG. 1B, the teeth 4 protrude from both sides with respect to the upper opening in the same figure in each slot 2. Further, between the lower surface of the tooth 4 in the figure and the coil wire 3 wound in the slot 2, it is formed into a substantially U-shaped cross section made of, for example, thin paper or a resin film. A wedge 5 is inserted, and this wedge 5 closes the opening of the slot 2 around which the coil wire 3 is wound.

  Next, the wedge insertion device 10 according to the embodiment of the present invention will be described. The wedge insertion device 10 is a device for inserting the wedge 5 into the opening at the top of the slot 2 where the coil wire 3 has already been wound in the stator 1. 2A to FIG. 2C and FIG. 3, the main body member 11 (holding means) in which the through-hole 12 into which the wedge 5 can be inserted is formed, and the through-hole 12 is moved. And a movable member 14 having a pressing portion 15 (pressing means) that presses the end portion of the wedge 5, and the end portion of the wedge 5 inserted into the through hole 12 is pressed by the pressing portion 15. As a result, the wedge 5 is guided through the through hole 12 and pushed out from the extrusion port 12 a of the through hole 12.

  The main body member 11 of the wedge insertion device 10 has a through-hole 12 through which the wedge 5 can be inserted, penetrating along the longitudinal direction of the main body member, and can move the inserted wedge 5 in the longitudinal direction. It is possible to hold it. An extrusion port 12a through which the wedge 5 is pushed out is formed at one end portion of the through hole 12, and the pressing portion 15 of the movable portion 14 is movably inserted from the other end portion.

  As shown in FIG. 4, the through hole 12 of the main body member 11 has a cross-sectional shape that restrains the entire outer peripheral surface of the inserted wedge 5. Further, a groove portion 12 b corresponding to a protruding portion 15 a of the pressing portion 15 described later is formed in the upper part of the through hole 12 along the longitudinal direction over the entire body member 11.

  Thus, by forming the through-hole 12 having a cross-sectional shape that constrains the entire outer peripheral surface of the wedge 5 in the main body member 11, the outer peripheral surface of the wedge 5 is pushed out into the slot 2 when the wedge 5 is inserted. Therefore, even if the coil wire 3 is already wound around the slot 2 of the stator 1 and the space between the coil wire 3 and the tooth 4 is very narrow, the wedge 5 is easily deformed without buckling. Can be inserted.

  The main body member 11 protrudes from the upper end of the front end of the main body member 11 from which the wedge 5 is pushed out to form a stepped portion 13. As shown in FIG. 5, the stepped portion 13 is formed at a position that is a distance h from the upper surface of the wedge 5 that is inserted into the through hole 12 and located at the extrusion port 12a. 1 is substantially equal to the thickness t of each tooth 4.

  By forming the step portion 13 at a distance h substantially the same as the thickness t of the tooth 4, the main body member 11 is placed on the tooth 4 with the step portion 13 as a reference when the wedge 5 is inserted. The wedge 5 to be inserted is positioned in the vertical direction with respect to the narrow gap between the lower surface of the tooth 4 and the wound coil wire simply by placing it, so that the wedge 5 can be easily inserted. It becomes.

  The movable member 14 of the wedge insertion device 10 includes a pressing portion 15 that can move in the through hole 12 of the main body member 11 and the outside of the main body member 11 so as to move the pressing portion 15 relative to the main body member 11. A rod 16 and a handle 17 for operation are provided.

  The pressing portion 15 of the movable member 14 has a cross-sectional shape in which a slight clearance is given to the cross-sectional shape of the through hole 12 formed in the main body member 11 described above. Further, as shown in FIGS. 2C and 3, a protruding portion 15 a protruding from the upper part of the outer peripheral surface of the wedge 5 is formed.

  By forming such a protruding portion 15a in the pressing portion 15, when the end surface of the wedge 5 is pressed by the pressing portion 15, the wedge enters the gap between the through hole 12 and the pressing portion 15 to generate a scum. It is possible to prevent this.

  Next, the operation will be described.

  First, as shown in FIG. 3, the wedge 5 is inserted and held in the main body member 11 from the extrusion port 12 a of the wedge insertion device 10 until it comes into contact with the pressing surface of the pressing portion 15 of the movable member 14. .

  Next, as shown in FIG. 6, the wedge insertion device 10 is moved to the stator 1 and positioned with respect to the predetermined slot 2, and the main body member 11 of the wedge insertion device 10 is moved to the slot 2 with reference to the step portion 13. Place on the upper surface of the teeth 4.

  At this time, as shown in FIG. 5, since the thickness t of the tooth 4 and the distance h of the stepped portion 13 are substantially the same, the coil wire wound around the lower surface of the tooth 4 and the wedge 5 It is positioned in the vertical direction with respect to the narrow gap.

  Next, as shown in FIG. 6, the handle 17 is operated so as to move the movable member 14 relative to the main body member 11 in the direction of the arrow in FIG. 11 is moved in the through hole 12.

  By this movement, the pressing portion 15 contacts and presses against the end surface of the wedge 5 held by the main body member 11, and the wedge 5 is guided in the through hole 12 of the main body member 11 and pushed out from the extrusion port 12a. , Inserted into the slot 2.

  At this time, since the wedge 5 is pushed out while the through-hole 12 restrains the entire outer peripheral surface of the wedge 5, the coil wire 3 has already been wound around the slot 2 of the stator 1, and the gap between the coil wire 3 and the tooth 4 is reduced. Even if the space is very narrow, the wedge 5 can be easily inserted without causing buckling deformation.

  Further, since the protruding portion 15 a that protrudes from the upper part of the outer peripheral surface of the wedge 5 is formed in the pressing portion 15, when the end surface of the wedge 5 is pressed by the pressing portion 15, the wedge 5 is connected to the through hole 12 and the pressing portion 15. The wedge 5 can be stably pushed out without entering the gap between the two and generating a squeak.

  As described above, in the wedge insertion device according to the present embodiment, the outer peripheral surface of the wedge is wrapped when the wedge is inserted by forming the through hole having a cross-sectional shape that restrains the entire outer peripheral surface of the wedge in the main body member. However, even if the coil wire is already wound in the slot of the stator and the space between the coil wire and the teeth is very narrow, the wedge is not easily buckled and deformed. It becomes possible to insert.

  Further, in the wedge insertion device according to the present embodiment, when the pressing portion presses the wedge end surface by forming a protruding portion that protrudes from the upper part of the outer peripheral surface of the wedge in the pressing portion that contacts and presses the wedge, The wedge can be stably pushed out without entering the gap between the through-hole of the main body member and the pressing portion and causing a scum.

  Furthermore, in the wedge insertion device according to the present embodiment, the upper part of the tip of the body member on the extrusion port side protrudes, and a step portion is formed at a position substantially the same as the thickness of the teeth from the extrusion port. Therefore, when the wedge is inserted, the wedge can be inserted into the narrow gap between the lower surface of the tooth and the wound coil wire only by placing the main body member on the tooth with the stepped portion as a reference. Since it is positioned with respect to the wedge, the wedge can be easily inserted.

The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention. For example, in the above-described embodiment, the wedge insertion device has been described as a device such as a so-called jig that can be used manually, but the present invention is not particularly limited to this, for example, an actuator that drives a movable member, or the like. It may be provided and applied to an automatic wedge insertion device or the like.

FIG. 1A is a perspective view of a stator in an embodiment of the present invention, and FIG. 1B is a detailed cross-sectional view of the IB portion of FIG. 2 (A) to 2 (C) are views showing a wedge insertion device according to an embodiment of the present invention, FIG. 2 (A) is a side view thereof, FIG. 2 (B) is a front view thereof, and FIG. C) is a rear view thereof. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a side view showing the positional relationship between the wedge insertion device and the slot according to the embodiment of the present invention. FIG. 6 is a perspective view showing a state in which the wedge is inserted using the wedge insertion device according to the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Stator 2 ... Slot 3 ... Coil wire 4 ... Teeth 5 ... Wedge 10 ... Wedge insertion apparatus 11 ... Main body member 12 ... Through-hole 12a ... Extrusion port 12b ... Groove part 13 ... Step part 14 ... Movable member 15 ... Pressing part 15a ... Protrusion 16 ... Rod 17 ... Handle t ... Teeth thickness h ... Step height

Claims (3)

A wedge insertion device for inserting a wedge into a gap between the coil wire and the tooth in a slot of the stator where the coil wire has already been wound,
Holding means for restraining the outer peripheral surface of the wedge and holding the wedge movably along the longitudinal direction;
A wedge insertion device comprising: pressing means for pressing an end face of the wedge held by the holding means in the longitudinal direction.   2. The wedge insertion device according to claim 1, wherein the pressing unit has a protruding portion that protrudes from an outer peripheral surface of the wedge on a pressing surface that presses an end surface of the wedge. The holding means is
An extrusion port through which the wedge pressed by the pressing means is extruded;
The wedge insertion device according to claim 1, further comprising a step portion formed so that a distance from an upper surface of the wedge located at the extrusion port is substantially the same as a thickness of the teeth.

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