JP2018042373A - Positioning tool and positioning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning tool and a positioning method which make it easy to position a continuity member when positioning the continuity member connected to a lead wire of a coil with respect to a stator.SOLUTION: A positioning tool 20 includes an inner guide part 201, an outer guide part 202, and a coupling part 203. The inside guide part 201 is disposed above a stator so as to be coaxial with the stator, and has an outer side surface 2011 including a conical surface which is brought into contact with an inner peripheral edge of a continuity member 4 and has an outer diameter that decreases as going upward. The outer guide part 202 is disposed outside in a radial direction of the inner guide part 201 by interposing a gap therebetween, while surrounding the inner guide part 201. The outer guide part 202 has an inner side surface brought into contact with an outer peripheral edge of the continuity member 4. The coupling part 203 couples the inner guide part 201 and the outer guide part 202 in a part in a circumferential direction of the gap.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a positioning jig and a positioning method used for assembling a motor.

  Conventionally, various types of so-called inner rotor type motors have been developed in which a rotor is arranged inside a ring-shaped stator. In such a motor, a plate-like conducting member made of copper, aluminum, or the like called a bus bar is used to electrically connect a lead wire drawn from a coil included in the stator to another lead wire or an external connection terminal. There is what is provided. The conducting member has an arc shape and is disposed on the upper side of the stator. This conducting member is used while being held by a resin holding member in order to achieve electrical insulation between the conducting members or peripheral members. Such a motor is disclosed in Patent Document 1, for example.

JP 2010-200400 A

  Here, the conductive member may be held by an insulator included in the stator. In this case, the insulator corresponds to the resin holding member. When fixing this conducting member to the insulator, it is necessary to position the conducting member with respect to the insulator. The conductive member may be thinned to reduce the amount of metal used as much as possible to reduce the cost. The thinned conducting member is soft because of its low rigidity, and bends when it has itself. Therefore, in the motor manufacturing process, there has been a problem that it is difficult to work when positioning the thinned conducting member with respect to the insulator. This problem occurs not only when the resin holding member uses an insulator but also when a dedicated resin holding member is used.

  In view of the above situation, the present invention provides a positioning jig and a positioning method capable of easily positioning a conducting member when positioning the conducting member connected to the lead wire of the coil with respect to the stator. Objective.

An exemplary positioning jig of the present invention includes:
A stator used for an inner rotor type motor and having a central axis extending in the vertical direction;
An arc-shaped conducting member disposed on the upper side of the stator to electrically connect with a plurality of lead wires drawn from the coil of the stator;
A positioning jig for positioning the conducting member with respect to the stator,
An inner guide portion that is disposed on the upper side of the stator so as to be coaxial with the stator, has an outer surface that includes a conical surface that comes into contact with the inner peripheral edge of the conducting member and decreases in outer diameter toward the upper side; ,
An outer guide portion disposed on the radially outer side of the inner guide portion via the gap, surrounding the inner guide portion, and having an inner surface that contacts the outer peripheral edge of the conducting member;
It is set as the structure provided with the connection part which connects the said inner side guide part and the said outer side guide part in a part of circumferential direction of the said clearance gap.

An exemplary positioning method of the present invention includes:
A stator used for an inner rotor type motor and having a central axis extending in the vertical direction;
A ring-shaped conducting member disposed on the upper side of the stator in order to electrically connect with a plurality of lead wires drawn from the coil of the stator;
A positioning method for positioning the conducting member with respect to the stator,
An inner guide portion disposed on the upper side of the stator so as to be coaxial, contacting an inner peripheral edge of the conducting member, and having an outer surface including a conical surface whose outer diameter decreases toward the upper side; and the inner guide An outer guide portion that is disposed on the radially outer side of the portion around the inner guide portion via a gap and has an inner surface that contacts the outer peripheral edge of the conducting member,
The conductive member is inserted into the gap along the outer surface, guided by being sandwiched between the outer surface and the inner surface, and positioned with respect to the stator.

  According to the exemplary positioning jig and positioning method of the present invention, it is possible to easily position the conductive member to be connected to the lead wire of the coil.

FIG. 1 is a schematic side sectional view showing an example of a motor that can use the positioning jig and positioning method of the present invention. FIG. 2 is a perspective view of a positioning jig according to an embodiment of the present invention. FIG. 3 is a schematic side view showing a state where the positioning jig is mounted on the stator. FIG. 4 is a schematic side view showing a state in which the conducting member is positioned with respect to the stator using the positioning jig of the present invention. FIG. 5 is a schematic side view showing a state in which the connection mechanism is moved downward and the lower end of the fixing member is inserted into the gap between the inner guide portion and the outer guide portion. FIG. 6 is a schematic side view showing a state in which the sliding member is moved downward and a force is applied to the connecting portion by the claw portion of the fixing member.

  Exemplary embodiments of a positioning jig and a positioning method of the present invention will be described below with reference to the drawings.

<Overall configuration of brushless motor>
First, an example of a motor that can use the positioning jig and positioning method of the present invention will be described with reference to FIG. FIG. 1 is a schematic side sectional view of a motor 15 that can use the positioning jig or positioning method of the present invention. The motor 15 shown in FIG. 1 is an inner rotor type brushless motor. 1 in the direction of the central axis J1 of the motor is simply referred to as “upper side”, and the lower side is simply referred to as “lower side”. However, the vertical direction does not indicate the positional relationship and direction when incorporated in an actual device. Further, a direction parallel to the central axis J1 is simply referred to as “axial direction”, a radial direction centered on the central axis J1 is simply referred to as “radial direction”, and a circumferential direction centered on the central axis J1 is simply referred to as “circumferential direction”. "

  The motor 15 includes a housing 1, a stator 2, a rotor 3, a conduction member 4, a wiring support portion 5, a cover portion 6, a bearing holder 7, bearings 81 and 82, a shaft 9, and a resolver 10. .

  The housing 1 has a bottomed cylindrical shape centered on the central axis J1, and is formed by pressing a thin steel plate. An annular recess 11 is formed at the center of the bottom of the housing 1. A stator 2 arranged in an annular shape is fixed to the bottom of the cylindrical portion 12 of the housing 1 by press-fitting. An upper side of the cylindrical portion 12 is opened, and a flange portion 13 extending outward in the radial direction is formed at an upper end portion thereof.

  The stator 2 includes a stator core 21, an insulator 22, and a coil 23. The stator core 21 includes a core back 21A and teeth 21B. The core back 21A is formed in an annular shape. The plurality of teeth 21B formed in a T shape in a top view are arranged radially extending from the core back 21A toward the central axis J1. An insulator 22 made of resin or the like is formed so as to cover the upper side, the lower side, and both side surfaces of the stator core 21, and electrically insulates the coil 23. The coil 23 is formed by winding a conducting wire in multiple layers on the insulator 22 of the tooth 21B. In this example, there are twelve teeth 21B, and one conductor 21 is wound around one tooth 21B, so that there are twelve coils 23 and twelve conductors. Each coil 23 is configured by star connection of three-phase coils defined by U phase, V phase, and W phase. That is, in each phase, four coils 23 are connected in parallel to form a star connection, so that one lead wire 23A (12 wires) drawn from the coil 23 is connected to form a neutral point. Further, the other lead wires 23B (12 wires) drawn from the coil 23 are connected to each other in phase and constitute three power lines.

  Here, in FIG. 1, an enlarged view of the main part of the portion indicated by the region A is also shown. The conducting member 4 is held by the peripheral wall portion 22 </ b> A of the insulator 22 disposed on the upper side of the stator core 21. The conducting member 4 is formed in a circular arc shape by a conductive material such as copper or aluminum, and has a plurality of connecting portions 41 arranged at intervals in the circumferential direction. The connecting portion 41 is connected to a lead wire 23 </ b> A for a neutral point that is drawn from the coil 23. That is, the conducting member 4 is disposed on the upper side of the stator 2 in order to be electrically connected to the plurality of lead wires 23A drawn from the plurality of coils 23 by caulking. A method for positioning the conductive member 4 with respect to the stator 2 and a method for connecting the conductive member 4 and the lead wire 23A will be described in detail later.

  The wiring support portion 5 is fixed to the flange 13 and is disposed above the conducting member 4. The wiring support part 5 is a resin member formed with a disk-shaped part 51 having an opening 51A at the center. The power line lead wire 23 </ b> B drawn out from the coil 23 is passed through a through-hole formed in the disc-like portion 51, led out from the lower side of the disc-like portion 51, and formed in the disc-like portion 51. Guided into the arc-shaped groove. The lead wire 23 </ b> B is routed in the groove and can be electrically connected to the outside of the motor 15.

  The cover portion 6 is disposed on the upper side of the wiring support portion 5. The bearing holder 7 is inserted into the opening 61 and the opening 51 </ b> A formed in the center of the cover 6. The bearing 82 is accommodated in an upper cylindrical recess 71 formed in the bearing holder 7. The bearing 81 is accommodated in the annular recess 11. The shaft 9 is rotatably supported by the bearings 81 and 82, and is disposed coaxially with the central axis J1.

  The rotor 3 is disposed in the central hole 2 </ b> A that is a space surrounded by the stator 2. The rotor 3 includes a yoke 31 and a rotor magnet 32. A yoke 31 is fixed to the shaft 9 at a position overlapping the stator 2 in the radial direction. The yoke 31 is configured by laminating a plurality of steel plates formed of magnetic thin plates. A rotor magnet 32 is fixed to the outer peripheral surface of the yoke 31 with an adhesive.

  A resolver 10 as a position detection mechanism is arranged on the upper side of the rotor 3. The resolver 10 includes a resolver rotor unit 101 and a resolver stator unit 102. The resolver rotor portion 101 is fixed to the shaft 9 on the upper side of the yoke 31. The resolver stator portion 102 is fixed to the inner peripheral surface of the lower cylindrical concave portion 72 of the bearing holder 7 so as to face the resolver rotor portion 101 in the radial direction.

<Conductive member positioning method>
Next, a method for positioning the conductive member 4 included in the motor 15 having the above-described configuration with respect to the stator 2 will be described with reference to FIGS. FIG. 2 is a perspective view of a positioning jig 20 used for positioning the conductive member 4. FIG. 3 is a schematic side view showing a state where the positioning jig 20 is attached to the stator 2. FIG. 3 includes cross-sectional views of some members.

  3 in the direction of the central axis J11 of the stator 2 is simply referred to as “upper side”, and the lower side is simply referred to as “lower side”. That is, the stator 2 has a central axis J11 extending in the vertical direction. The central axis J11 is the same as the central axis J1 of the motor 15. However, the vertical direction does not indicate the positional relationship and direction when incorporated in an actual device. A direction parallel to the central axis J11 is simply referred to as “axial direction”, a radial direction centered on the central axis J11 is simply referred to as “radial direction”, and a circumferential direction centered on the central axis J11 is simply referred to as “circumferential direction”. " In addition, about said direction relationship, it is the same also about FIGS.

  The positioning jig 20 is used for positioning the conducting member 4 with respect to the stator 2 in the stator unit having the stator 2 and the conducting member 4. As shown in FIG. 2, the positioning jig 20 includes an inner guide portion 201, an outer guide portion 202, a connecting portion 203, and a protruding portion 204.

  The inner side guide part 201 has the outer side surface 2011 in the outer peripheral surface. The outer side surface 2011 includes a conical surface 2011A located on the upper side and a cylindrical surface 2011B located on the lower side. The outer diameter of the conical surface 2011A becomes smaller toward the upper side. The cylindrical surface 2011B has a constant outer diameter in the vertical direction.

  The outer guide portion 202 is an annular member that is coaxial with the inner guide portion 201 and is disposed on the radially outer side of the inner guide portion 201 so as to surround the inner guide portion 201 via a gap 205. The outer guide part 202 has a plurality of inner side surfaces 2021 arranged at intervals in the circumferential direction. The inner side surface 2021 is arranged in the vertical direction at a position facing the conical surface 2011A in the radial direction so that the inner diameter decreases toward the lower side, and at a position facing the cylindrical surface 2011B in the radial direction. A cylindrical surface 2021B having a constant inner diameter. The gap 205 includes an upper gap 205A formed by the conical surface 2011A and the inclined surface 2021A, and a lower gap 205B formed by the columnar surface 2011B and the cylindrical surface 2021B. Moreover, the outer side guide part 202 has the recessed surface 2022 arrange | positioned on the circumferential direction both sides of the inner surface 2021. FIG. The recessed surface 2022 is recessed more radially outward than the inner surface 2021.

  The protruding portion 204 is coaxial with the inner guide 201 and is provided below the inner guide portion 201. The inner side guide part 201 has the opening 2013A in the upper part, and has the hole 2013 extended in an up-down direction. The protrusion 204 has a hole 2041 having an opening 2041A in the lower portion and extending in the vertical direction. One through hole extending in the vertical direction is formed by the hole 2013 and the hole 2041. The hole 2013 has a columnar recess 2013B that is open at the top and extends in the vertical direction. The columnar recess 2013B functions as a positioning portion.

  Here, in FIG. 2, an enlarged view of the main part of the portion indicated by region B is also shown. The connecting portion 203 connects the inner guide portion 201 and the outer guide portion 202 at a part in the circumferential direction of the gap 205 between the inner guide portion 201 and the outer guide portion 202. In FIG. 2, the connecting portion 203 is connected to the inner side surface 2021. The connecting portion 203 may be connected to the recessed surface 2022.

  Next, the process of positioning the conductive member 4 using the positioning jig 20 will be described. First, the stator 2 is prepared in a state in which the lead wire 23A is drawn upward. The workpiece in a state where the stator 2 is fixed in the housing 1 by press fitting is placed on the placing table 25. In this state, the protrusion 204 of the positioning jig 20 is fitted into the center hole 2 </ b> A of the stator 2, and the positioning jig 20 is attached to the stator 2. The outer diameter of the protrusion 204 is somewhat smaller than the inner diameter of the central hole 2A. Accordingly, the inner guide portion 201 of the positioning jig 20 is arranged on the upper side of the stator 2 and coaxially with the stator 2. At this time, since the inner guide part 201 and the outer guide part 202 are connected by the connecting part 203, the outer guide part 202 can be set simultaneously with the inner guide part 201.

  By fitting the protruding portion 204 into the center hole 2A of the stator 2 as described above, the positioning jig 20 can be easily aligned with the stator 2 on the same axis. At this time, the protruding piece 2012 provided on the outer surface of the protruding portion 204 is inserted into the slot of the stator 2 (the gap between the circumferentially adjacent coils 23). Thereby, the circumferential positioning of the inner side guide part 201 can be performed. At this time, the lower surface 201 </ b> A of the inner guide portion 201 is in contact with the inner peripheral upper end surface of the insulator 22. That is, the inner guide portion 201 has a lower surface 201 </ b> A that contacts the upper surface of the stator 2. Thereby, the positioning jig 20 can be easily positioned in the vertical direction with respect to the stator 2. Note that the upper surface of the stator 2 that contacts the lower surface 201 </ b> A may be the upper surface of the coil 23 or the upper surface of the stator core 21, depending on the configuration of the stator 2.

  Further, in the setting state of the positioning jig 20 shown in FIG. 3, each lead wire 23 </ b> A drawn upward from each coil 23 faces each concave surface 2022 of the outer guide portion 202 in the radial direction.

  Here, a specific configuration of the conductive member 4 will be described with reference to FIG. The conductive member 4 (bus bar) is formed by deforming a strip-shaped copper plate into a ring shape. That is, the conducting member 4 is a thin band-shaped metal plate, and has a small rigidity and is soft. The conductive member 4 includes a plurality of connection portions 41, a base portion 42, and a plurality of holding pieces 43. The base portion 42 is formed in a ring shape having a notch in a part thereof, that is, an arc shape. The connection portions 41 protrude upward from the base portion 42 and are arranged at intervals in the circumferential direction. The connecting portion 41 has a V-shaped portion 41A that is V-shaped when viewed from above at the end in the protruding direction. The V-shaped portion 41 </ b> A is provided with one end opened in the circumferential direction on the radially outer side of the base portion 42. The holding piece 43 protrudes radially outward from the lower end of the outer peripheral surface of the base portion 42 and has six pieces spaced apart in the circumferential direction. The plurality of holding pieces 43 are accommodated in the step groove 22B on the inner peripheral side of the peripheral wall portion 22A of the insulator 22, whereby the conductive member 4 is held by the insulator 22 and the movement in the circumferential direction and the lower side is restricted. The conductive member 4 is fixed to the stator 2 by connecting the plurality of connecting portions 41 and the lead wires 23A.

  In the state where the positioning jig 20 is set with respect to the stator 2 as shown in FIG. 3, the conductive member 4 is moved downward from the upper side of the inner guide part 201 through the upper gap 205 </ b> A so as to surround the inner guide part 201. Let Then, the inner peripheral edge of the base portion 42 of the conducting member 4 is inserted into the lower gap 205 </ b> B between the inner guide portion 201 and the outer guide portion 202 while being along the outer surface 2011.

  Further, when the conductive member 4 is inserted into the lower gap 205 </ b> B between the inner guide portion 201 and the outer guide portion 202, both end portions in the circumferential direction of the base portion 42 are brought into contact with the connecting portion 203. That is, the notch in the ring-shaped conducting member 4 is passed through the connecting portion 203. Thereby, positioning of the conduction member 4 in the circumferential direction is possible.

  Thereby, the conduction member 4 is guided while the base portion 42 is sandwiched between the outer side surface 2011 and the inner side surface 2021, and movement in the radial direction is restricted. That is, the inner peripheral edge of the base 42 is in contact with the columnar surface 2011B, and the outer peripheral edge of the base 42 is in contact with the cylindrical surface 2021B. As a result, the conductive member 4 that is soft and easily deformed can be shaped into a desired substantially circular shape and easily positioned on the stator 2. A state where the conducting member 4 is positioned with respect to the stator 2 is shown in FIG.

  In a state where the conducting member 4 is positioned with respect to the stator 2, each connecting portion 41 faces each recessed surface 2022 in the radial direction. At this time, the V-shaped portion 41A of the connecting portion 41 is disposed at a position where the end portion of the leader line 23A is sandwiched. Thereby, it becomes possible to connect and fix the lead wire 23 </ b> A to the connection portion 41 in a later process described later.

<Connection method of conducting member and lead wire>
Next, a method of connecting and fixing the conductive member 4 positioned with respect to the stator 2 and the lead wire 23A as described above will be described. In order to connect and fix the lead wire 23 </ b> A and the connection portion 41 of the conductive member 4, a conductive member fixing device 40 as shown in FIG. 4 is used. The conductive member fixing device 40 includes a mounting table 25, a positioning jig 20, and a connection mechanism 30. In the stator unit having the stator 2 and the conductive member 4, the conductive member fixing device 40 is used to connect and fix each of the plurality of connecting portions 41 in the conductive member 4 to each of the plurality of lead wires 23 </ b> A.

  The connection mechanism 30 includes a slide member 301, a fixing member 302, and an O-ring 303. The slide member 301 is movable in the vertical direction with respect to the main body (not shown) of the conductive member fixing device 40 and is fitted in the hole 2013 of the inner guide portion 201 so as to be inserted and removed.

  The slide member 301 has a conical part 3011, a columnar part 3012, and a step surface 3013. The conical part 3011 has an outer surface whose outer diameter decreases toward the lower side. The columnar part 3012 is disposed below the conical part 3011 and fits into the hole 2013. The step surface 3013 is located between the conical part 3011 and the columnar part 3012 and has an outer diameter larger than the minimum outer diameter of the conical part 3011. The columnar portion 3012 has a columnar convex portion 3012A that protrudes radially outward and extends in the vertical direction on the outer peripheral surface.

  The fixing member 302 is used for connecting and fixing the lead wire 23 </ b> A and the connecting portion 41. The number of fixing members 302 is twelve in accordance with the number of lead wires 23A and connecting portions 41. The plurality of fixing members 302 are arranged at intervals in the circumferential direction with respect to the slide member 301. The fixing member 302 includes an arm part 3021, a moving part 3022, a rotating member 3023, and a claw part 3021 </ b> A. The arm portion 3021 is curved so as to protrude outward in the radial direction and extends in the vertical direction. The moving part 3022 is provided at the upper end of the arm part 3021 so that the arm part 3021 can move the conical part 3011 in the vertical direction.

  The moving part 3022 has a rolling part 3022A that rolls on the outer surface of the conical part 3011. Rolling portion 3022A is a wheel-like member that can rotate about a direction in contact with the circumferential direction as a rotation axis. The rolling portion 3022A is movable in a groove portion provided on the outer surface of the conical portion 3011 along the vertical direction. That is, the moving unit 3022 can move in the vertical direction from a position where the moving 3022 hits the stepped surface 3013 as a lower limit to a position where the upper end of the conical part 3011 is an upper limit. By providing the groove, movement of the fixing member 302 in the circumferential direction is restricted. Instead of the groove portion, for example, a wall portion may be provided on the outer surface of the conical portion 3011 so as to incline in the vertical direction and sandwich the rolling portion 3022A from both sides. Further, the rolling portion 3022A is not limited to a wheel-like member, and may be a ball-like member, for example. By moving the fixing member 302 using the rolling portion 3022A, the fixing member 302 can be smoothly moved with respect to the outer surface of the conical portion 3011.

  The claw portion 3021A is provided at the lower end of the arm portion 3021 via the rotating member 3023. The rotation member 3023 is held around the rotation axis that extends in the tangential direction of a circle defined in the circumferential direction with respect to the arm portion 3021. Accordingly, the claw portion 3021A can rotate around the rotation axis of the rotation member 3023. The claw portion 3021A is a portion that applies a force to the connecting portion 41 to plastically deform the connecting portion 41 to connect and fix the connecting portion 41 and the lead wire 23A. This connection method means connection by caulking. A detailed connection method will be described later.

  The O-ring 303 (ring-shaped member) is a rubber ring-shaped member, and the rolling portion 3022A is placed on the conical portion 3011 by pushing the upper side of each arm portion 3021 arranged in the circumferential direction inward in the radial direction. Can be stably rolled. Instead of the O-ring 303, for example, a ring-shaped spring or linkage may be used as another means having the same function.

  Here, as shown in FIG. 4, the positioning member 20 is mounted on the stator 2 mounted on the mounting table 25, and the conductive member 4 is positioned so that the conductive member 4 is connected to the inner guide portion 201 and the outer guide portion. Suppose that it is the state arrange | positioned in the lower side clearance 205B with 202. FIG. At this time, the end portions of the leader lines 23A are located in the V-shaped portions 41A of the connection portions 41. Since the opening width of the V-shaped portion 41A is sufficiently large with respect to the wire diameter of the lead wire 23A, the lead wire 23A can be positioned in the V-shaped portion 41A even if the lead wire 23A is slightly displaced. it can.

  Then, as shown in FIG. 4, the connection mechanism 30 located on the upper side of the positioning jig 20 moves downward. At this time, the moving part 3022 of the fixing member 302 is located at the lower end of the conical part 3011. When the connection mechanism 30 moves further downward, the columnar part 3012 of the slide member 301 is inserted into the hole 2013 from the opening 2013A, and the columnar part 3012 fits into the hole 2013. At this time, the columnar convex portion 3012A is inserted into the columnar concave portion 2013B. Thereby, the circumferential positioning of the slide member 301 is performed. Note that the concave-convex relationship between the columnar convex portion 3012A and the columnar concave portion 2013B may be reversed.

  When the connection mechanism 30 moves further downward, the claw portion 3021A and the rotating member 3023 are inserted into the upper gap 205A of the positioning jig 20 at a location facing the recessed surface 2022 in the radial direction. Then, as shown in FIG. 5, the claw portion 3021 </ b> A comes into contact with the recessed surface 2022 of the outer guide portion 202, so that the outward movement in the radial direction is restricted.

  In this state, when the connection mechanism 30 is further moved downward and the slide member 301 is moved downward, the moving part 3022 is moved upward on the outer surface of the conical part 3011, and accordingly, the upper end of the arm part 3021 is moved upward. Move radially outward. At this time, the lower end of the claw portion 3021A comes into contact with the upper surface of the insulator 22, and the downward movement of the claw portion 3021A is restricted. Accordingly, the arm portion 3021 rotates radially outward with the rotating member 3023 as a fulcrum, and conversely, the claw portion 3021A rotates radially inward with the rotating member 3023 as a fulcrum. Note that the lower end of the claw portion 3021 </ b> A is not limited to the insulator 22 and may be in contact with the upper surface of the stator core 21.

  As shown in FIG. 6, when the slide member 301 continues to move downward while the claw portion 3021 </ b> A is in contact with the connection portion 41 of the conducting member 4, the moving portion 3022 moves the outer surface of the conical portion 3011 upward. As it moves, the upper end of the arm portion 3021 moves outward in the radial direction indicated by the arrow Y1, and the lower end of the claw portion 3021A further moves inward in the radial direction indicated by the arrow Y2. As a result, the claw portion 3021A exerts a force on the connection portion 41 so as to sandwich the connection portion 41 and the end portion of the lead wire 23A between the outer surface 2011 of the inner guide portion 201, whereby the connection portion 41 41 is plastically deformed, and the connecting portion 41 and the lead wire 23A are connected and fixed. More specifically, the leader line 23A is located in the V-shaped portion 41A, and the inner side in the radial direction of the V-shaped portion 41A is in contact with the outer surface 2011 of the inner guide portion 201. When the radially outer side is pressed radially inward by the claw portion 3021A, the V-shaped portion 41A is deformed so as to be folded, and the V-shaped portion 41A and the lead wire 23A are connected and fixed. As described above, it is possible to perform the connection and fixing operation of the conducting member 4 and the lead wire 23 </ b> A in a state where the conducting member 4 is appropriately positioned with respect to the stator 2 by the positioning jig 20. The connection member 41 and the lead wire 23 </ b> A are connected and fixed, whereby the conductive member 4 is fixed to the stator 2.

  Next, a process of removing the connection mechanism 30 and the positioning jig 20 from the stator unit in which the conductive member 4 is fixed to the stator 2 will be described. This process is basically the reverse of the above-described process.

  When the connection mechanism 30 moves upward and the slide member 301 also moves upward, the upper end of the arm part 3021 moves radially inward. The claw portion 3021 </ b> A moves radially outward and moves away from the connection portion 41. As shown in FIG. 5, when the upper end of the arm portion 3021 comes into contact with the stepped surface 3013 of the connection mechanism 30 and the connection mechanism 30 moves upward, the fixing member 302 moves upward together with the connection mechanism 30 as shown in FIG. 4. Lifts up and disengages from the positioning jig 20. Thereafter, when the positioning jig 20 is removed from the stator unit, the stator unit in which the conducting member 4 is fixed to the stator 2 is completed.

  The mechanism for plastically deforming the connecting portion 41 and connecting and fixing the connecting portion 41 and the lead wire 23 </ b> A in the conductive member fixing device 40 can be explained by “the principle of lever”. That is, the moving part 3022 of the fixed member 302 is defined as a power point, the claw part 3021A is defined as an action point, and the rotating member 3023 is defined as a fulcrum. By applying a force radially outward to the force point (moving part 3022), the arm part 3021 is rotated around the axis of the fulcrum (rotating member 3023), and the connecting part radially inward from the action point (claw part 3021A). It is possible to exert a force on 41, plastically deform the connecting portion 41, and connect and fix the connecting portion 41 to the lead wire 23A.

  Since a series of connection operations in the fixing member 302 can be performed simultaneously with the twelve fixing members 302, the conductive member fixing device 40 can efficiently realize the connection fixing operation. Since the twelve connecting portions 41 are arranged at approximately equal intervals in the circumferential direction, the force acting radially inward from the claw portion 3021A exerts almost equal stress on the entire circumferential direction of the conducting member 4. To do. Therefore, it is suppressed that the conduction member 4 is greatly collapsed from the perfect circle shape and deformed. In addition, since the length of the force point and the fulcrum is sufficiently longer than the length of the fulcrum and the action point, even if the radially outward force at the force point is small, a sufficiently large force can be exerted on the action point radially inward. it can.

  In addition, the connection and fixation between the connecting portion 41 and the lead wire 23A is such that the conduction member 4 is restricted from moving in the vertical direction by the rotating member 3023 and the insulator 22, and the positioning jig 20 is used in the radial and circumferential directions. Since the movement is performed in a restricted state, even when a radially inner force is applied from each claw portion 3021A, the conductive member 4 is prevented from being greatly collapsed from the perfect circle shape and deformed. If the work of plastically deforming the connecting portion 41 of the conducting member 4 and connecting and fixing the connecting portion 41 and the lead wire 23A one by one with a tool such as a pliers, the conducting member 4 is soft. By simply picking and holding it by hand, it will bend about the part picked by hand and the shape of a perfect circle will collapse, making it difficult to work. Further, when the connecting portion 41 is plastically deformed with pliers, the conductive member 4 is displaced due to vibration of the pliers being propagated to the periphery and the work is further difficult to perform.

  The fixing members 302 are desirably arranged at equal intervals in the circumferential direction. However, the fixing members 302 depend on the positions of the lead wire 23A and the connecting portion 41, and are not necessarily arranged at equal intervals. Absent.

<Others>
The embodiments of the positioning jig and the positioning method described above can be modified as follows, for example. For example, the number of fixing members 302 may be smaller than the number of all lead wires 23A to which the conductive member 4 is connected. For example, the number of leader lines 23A may be twelve and the number of fixing members 302 may be six, which is smaller than that. In this case, if the 12 lead lines 23A are arranged at equal intervals in the circumferential direction and the six fixing members are also arranged at equal intervals in the circumferential direction, the six lead lines 23A can be connected and fixed for the first time. The connection mechanism 30 is rotated in the circumferential direction to the position of the unconnected lead wire 23A, and the second connection operation is performed. Thereby, the number of fixing members can be reduced and cost reduction can be aimed at.

  Moreover, the number of fixing members can be one. In this case, the connection work to the lead wire 23A is performed at one place, but even a plurality of stators 2 having different numbers or positions of the connection portions 41 can be connected.

  Or the one fixing member 302 is good also as fixing each of the some connection part 41 with respect to each of the some lead wire 23A. In the above example, if each of the six fixing members 302 fixes each of the two connection portions 41 to each of the two lead wires 23A, all the 12 lead wires are provided. 23A can be fixed simultaneously. That is, it is possible to perform an efficient connection fixing work while reducing the cost. In this case, the circumferential width of the claw portion 3021A and the like is made wider than when twelve fixing members 302 are provided.

  Moreover, the plastic deformation of the conduction member was used as a method for fixing the connection between the conduction member and the lead wire. However, the present invention is not limited to this, for example, by providing a heating part for melting solder or a welding part for performing welding (spot welding or the like) at the lower end of the arm part of the fixing member, May be connected and fixed by soldering or welding.

  In addition, the conductive member 4 is illustrated as being flexible because it has low rigidity and is flexible when held, but it can also be applied to a conductive member that is relatively rigid and difficult to bend.

  As mentioned above, although embodiment of this invention was described, if it is in the range of the meaning of this invention, embodiment can be variously changed.

  The present invention can be used, for example, in a process of positioning a conductive member with respect to a stator used in a brushless motor.

  DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Stator, 3 ... Rotor, 4 ... Conduction member, 41 ... Connection part, 41A ... V-shaped part, 42 ... Base part, ... -Wiring support part, 6 ... Cover part, 7 ... Bearing holder, 81, 82 ... Bearing, 9 ... Shaft, 10 ... Resolver, 15 ... Motor, 21 ... Stator core 21A ... Core back, 21B ... Teeth, 22 ... Insulator, 23 ... Coil, 23A, 23B ... Leader, 20 ... Positioning jig, 201 ... Inside guide , 2011 ... outer side, 2012 ... projection piece, 2013 ... hole, 2013A ... opening, 2013B ... columnar recess, 202 ... outer guide, 2021 ... inner side, 2022 ... concave surface, 203 ... connection 204... Projection, 2041... Hole, 2041 A... Opening, 25... Mounting Table, 30... Connection Mechanism, 301. ... Columnar part, 3012A ... Columnar convex part, 302 ... Fixing member, 3021 ... Arm part, 3021A ... Claw part, 3022 ... Moving part, 3022A ... Rolling part, 3023 ... Rotating member, 303 ... O-ring, 40 ... Conducting member fixing device

Claims (12)

A stator used for an inner rotor type motor and having a central axis extending in the vertical direction;
An arc-shaped conducting member disposed on the upper side of the stator to electrically connect with a plurality of lead wires drawn from the coil of the stator;
A positioning jig for positioning the conducting member with respect to the stator,
An inner guide portion that is disposed on the upper side of the stator so as to be coaxial with the stator, has an outer surface that includes a conical surface that comes into contact with the inner peripheral edge of the conducting member and decreases in outer diameter toward the upper side; ,
An outer guide portion disposed on the radially outer side of the inner guide portion via the gap, surrounding the inner guide portion, and having an inner surface that contacts the outer peripheral edge of the conducting member;
A connecting part that connects the inner guide part and the outer guide part in a part of the circumferential direction of the gap;
A positioning jig comprising:   The positioning jig according to claim 1, wherein the positioning jig has a protrusion that is coaxial with the inner guide portion, is provided below the inner guide portion, and fits in a central hole of the stator.   The positioning jig according to claim 1, wherein the inner guide portion has a protruding piece protruding downward.   The positioning jig according to claim 1, wherein the inner guide portion has a lower surface that comes into contact with an upper surface of the stator. A plurality of the inner side surfaces are arranged at intervals in the circumferential direction,
The outer guide part has a concave surface that is arranged on both sides in the circumferential direction of the inner side surface and is recessed radially outward from the inner side surface,
The connection part connected with the said lead line in the said conduction member when the said conduction member is positioned by the said positioning jig opposes the said recessed surface to radial direction, The Claims 1-4 characterized by the above-mentioned. The positioning jig according to any one of the above.   The positioning jig according to any one of claims 1 to 5, wherein the inner guide portion has a hole portion having an opening in an upper portion and extending in a vertical direction.   The positioning jig according to claim 6, wherein the inner guide portion has a positioning portion capable of determining a circumferential position in the hole portion. A stator used for an inner rotor type motor and having a central axis extending in the vertical direction;
A ring-shaped conducting member disposed on the upper side of the stator in order to electrically connect with a plurality of lead wires drawn from the coil of the stator;
A positioning method for positioning the conducting member with respect to the stator,
An inner guide portion disposed on the upper side of the stator so as to be coaxial, contacting an inner peripheral edge of the conducting member, and having an outer surface including a conical surface whose outer diameter decreases toward the upper side; and the inner guide An outer guide portion that is disposed on the radially outer side of the portion around the inner guide portion via a gap and has an inner surface that contacts the outer peripheral edge of the conducting member,
A positioning method comprising: a positioning step of inserting the conducting member into the gap along the outer side surface, inserting and guiding the conductive member between the outer side surface and the inner side surface, and positioning with respect to the stator. . The conducting member has an arc shape,
The inner guide portion, the outer guide portion, and a connecting portion that connects the inner guide portion and the outer guide portion in a part in the circumferential direction of the gap, and the both ends of the conductive member are The positioning method according to claim 8, wherein a positioning jig used in contact with the connecting portion is used. A positioning jig comprising: the inner guide portion; the outer guide; and a protruding portion that is provided below the inner guide portion so as to be coaxial with the inner guide portion and fits into a central hole of the stator. Use
10. The method according to claim 8, further comprising a step of arranging the positioning jig so that the protruding portion is fitted in a central hole of the stator and the positioning jig is coaxially aligned with the stator. The positioning method according to item. The inner guide portion has a lower surface in contact with the upper surface of the stator,
11. The method according to claim 8, further comprising an arrangement step of the inner guide portion in which the lower surface is brought into contact with the upper surface of the stator and the inner guide portion is positioned in a vertical direction with respect to the stator. The positioning method according to claim 1. The inner guide part has a protruding piece protruding downward,
12. The positioning method according to claim 8, wherein in the step of arranging the inner guide portion, the protruding piece is inserted between the coils adjacent to each other in the circumferential direction of the stator. .

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