JP2005304278A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor that facilitates fitting of a connecting member into a terminal holder and that can improve the efficiency of assembly work. <P>SOLUTION: To electrically connect the ends of winding coils 46 of a stator 16 to each other, terminals 50 are formed at the ends and embedded into a terminal holder 44. The conductive connecting members 54 that connect the terminals 50 to each other are embedded in holding groove 52 provided in the terminal holder 44. By making the holding groove 52 wider than the connecting members 54 in the terminal holder 44, the fitting is facilitated, and the efficiency of the assembly work is improved. Furthermore, by providing projections 60, the connecting members 54 can be held stably. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, a plurality of winding coils are arranged on a cylindrical iron core, terminals formed at terminals of the plurality of winding coils are embedded in a terminal holder, and the terminals are electrically conductive connection members. And a rotor in which permanent magnets having different magnetic poles are alternately arranged on the inner peripheral surface or outer peripheral surface of the stator in the circumferential direction.

Conventionally, a brushless motor has been used as a drive source of a canned motor pump used in a water pump for cooling a vehicle or the like. This brushless motor has a rotor (rotor) and a stator (stator), and some stators have an armature composed of a plurality of winding coils. For example, in the case of a stator having 12 winding coils used in a three-phase brushless motor, there are four winding coils in each phase (U phase, V phase, W phase). In order to use as an armature, it is necessary to connect all the terminals on one side of the 12 winding coils as neutral points, and also connect the terminals on the other side of the 4 winding coils of each phase. There is. For the connection between the ends of this winding coil, terminals (terminals) are formed at both ends of each winding coil, this terminal is embedded in a terminal holder, and the embedded terminals are connected with a conductive connecting member. It is common to connect. The present applicant arranges a plurality of winding coils along the circumferential direction of the cylindrical iron core in Patent Document 1, and embeds terminals formed at the terminals of the plurality of winding coils in the terminal holder, respectively. The stator which connected mutually with the connection member was disclosed. The terminal holder is provided with a groove according to the shape of the connecting member in advance, and the terminals can be electrically connected by fitting the connecting member, so that the assembly work is facilitated.
JP 2001-320848 A

  However, in the terminal holder shown in Patent Document 1, the shape of the groove is matched to the connection member, and the connection member is held entirely on the surface in the groove, so that the groove of the terminal holder or the connection member is deformed. It becomes difficult to fit the connecting member, and the efficiency of the assembly work is reduced. For this reason, it is necessary to strictly set the dimensional tolerance between the groove of the terminal holder and the connecting member, which increases the manufacturing cost of the parts.

  The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a motor capable of facilitating fitting of a connection member to a terminal support member and improving the efficiency of assembly work.

In the first aspect of the present invention, a winding coil is disposed in each of the regions equally divided along the circumferential direction of the cylindrical iron core, and the terminals of the plurality of winding coils are electrically connected to each other. A stator that generates a magnetic field by energizing each of the winding coils with a predetermined rotation;
A permanent magnet arranged coaxially opposite to the inner or outer peripheral surface of the stator, alternately arranged with different magnetic poles along the circumferential direction, and configured to rotate based on the change in the magnetic field. The stator is mounted with its end faces concentrically facing each other with respect to the stator, and terminals formed at the ends of the plurality of winding coils are embedded, and a space is formed between the terminals. An insulating terminal support member having a streak-like groove portion so as to communicate with each other, a conductive connection member that is loosely fitted in the groove portion and electrically connects the predetermined terminals, and the groove portion. The loosely-fitting connecting member is configured to include movement within the groove portion and holding means that suppresses and holds the connection member from falling off the groove portion.

  According to the first aspect of the present invention, the terminal formed at the end of the winding coil is embedded in the terminal support member. The conductive connecting member is fitted into a groove provided in the terminal support member in order to electrically connect predetermined terminals embedded in the terminal support member. The width of the groove is wider than that of the connecting member, and there is a spatial margin between the inserted connecting member. For this reason, the connecting member is loosely fitted in the groove. The holding means holds the connection member in the groove and suppresses the connection member from moving in the groove and falling off from the groove.

  Thus, since the connecting member has a space in the groove portion, the connecting member can be fitted into the groove portion even if the connecting member or the groove portion has a slight deformation. Therefore, since the fitting of the connecting member to the terminal support member is facilitated, the efficiency of the assembly work is improved. Further, the fitted connection member is stably held by the holding means.

  According to a second aspect of the present invention, in the first aspect of the present invention, the holding means is a protrusion formed in the groove portion so as to contact the connection member at predetermined intervals. .

  According to the second aspect of the present invention, the connecting member is stably held by contacting the protrusions provided at predetermined intervals in the groove. In addition, since the connection member has a space in a portion other than the protrusion, it is easy to fit the connection member into the terminal support member. Further, the holding force for holding the connecting member can be changed by appropriately adjusting the shape and size of the protrusion and the interval provided.

  According to a third aspect of the present invention, in the second aspect of the present invention, the projection closest to the terminal contacts the connection member from the opposite side of the side facing the terminal, and the connection member is It is close to the terminal side.

  According to the third aspect of the present invention, the connection member electrically connects predetermined terminals to each other, and is held by protrusions that are fitted into the groove portions and provided at predetermined intervals. Here, the protrusion closest to the terminal contacts the connecting member from the opposite side of the side facing the terminal. Thereby, since the force to the terminal side is applied to the connection member, the connection member can be brought closer to the terminal. Therefore, since the connection member and the terminal are close to each other, a state suitable for connection is obtained.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, the groove portion has a shape that becomes narrower as the depth increases.

  According to invention of Claim 4, the groove part is carrying out the shape where a width | variety becomes narrow, so that it becomes deep. Thereby, since the width | variety of a groove part will become narrow if a connection member is inserted deeply, the retention strength which hold | maintains a connection member can be increased.

  FIG. 1 shows a cross-sectional view of a canned motor pump 10 according to an embodiment of the present invention.

  The canned motor pump 10 includes a motor unit 12 that generates a driving force and a pump unit 14 that circulates liquid using the generated driving force. A brushless motor is used for the motor unit 12 of the canned motor pump 10. In the motor unit 12, the rotor 16 (rotor) and the stator 18 (stator) are partitioned by a can 20, and when the liquid is driven to circulate, the inside partitioned by the can 20 is filled with the liquid. The rotor 16 of the motor unit 12 is located on the inner side partitioned by the can 20 and has a cylindrical iron yoke 22 (shown in an axial cross section in FIG. 1), and also has a cylindrical shape and a circumferential direction. A rotor magnet 24 (shown in the cross section in the axial direction in FIG. 1), and a resin portion 26 (resin material) in which permanent magnets having different magnetic poles are alternately arranged. The rotor 16 has a thick cylindrical shape so that the iron yoke 22 provided coaxially and the rotor magnet 24 stacked on the outer peripheral side of the iron yoke 22 are covered with a resin material so as to be integrated. Molded. Further, the rotor 16 is provided with a groove having a substantially U-shaped cross section on the end surface opposite to the pump portion 14 in the circumferential direction, thereby reducing the amount of resin material to be used.

  The can 20 that divides the rotor 16 and the stator 18 of the motor unit 12 is formed of a resin material like the rotor 16, and the O-ring 30 </ b> A is sandwiched between the heat radiating plate 28 facing the end face of the rotor 16. It is sealed so that the liquid inside does not leak to the outside. A portion of the can 20 is also located on the outer peripheral side of the stator 18, and the outer case portion 32 </ b> A that is the outer case portion 32 </ b> A of the canned motor pump 10 is similar to the outer case portion 32 </ b> B of the pump portion 14. -It adheres in the state which pinched | interposed the ring 30B, and comprises the outer case 32 of the canned motor pump 10. As shown in FIG. On the other hand, the heat radiating plate 28 is formed of a member having good heat conductivity, and has a function of radiating the heat of the liquid inside to the outside and suppressing the temperature rise of the liquid. A shaft holding portion 34 is formed at the central portion of the heat radiating plate 28 on the rotor 16 side, and a shaft 36 is fitted therein. A bearing 38 is provided on the outer peripheral side of the shaft 36, and a part of the inner peripheral surface of the rotor 16 is fixed to the bearing 38 and can be rotated about the shaft 36.

  The impeller 40 of the pump unit 14 is fixed to the rotor 16, and the impeller 40 rotates with the rotation of the rotor 16, whereby the liquid is sucked from the suction hole 41 and discharged from the pump chamber 42. Yes.

  The stator 18 of the motor unit 12 is located between the outer case unit 32A and the can 20 and includes a stator core 43 (iron core) and a terminal holder 44 as a terminal support member.

  As shown in FIG. 2A, the stator core 43 has a cylindrical shape, and a winding coil 46 is wound around each slot 45. The stator core 43 according to the present embodiment has twelve slots 45 and is a stator 18 having three phases (U phase, V phase, W phase) and 12 slots. Terminals 50 are formed at both ends of each winding coil 46, and the terminals 50 are drawn out so as to extend above the stator core 43, and are supported through penetrating holes 48 provided in the terminal holder 44. ing. Here, one end side of the terminal 50 of each winding coil 46 is a terminal 50A, and the other end side is a terminal 50B.

  The terminal holder 44 is made of an insulating resin material and is formed into a cylindrical shape. As shown in FIGS. 2A and 2B, the terminal holder 44 has an outer diameter that is the same as the outer diameter of the stator core 43 and has an inner diameter larger than the inner diameter of the stator core 43 ( 1) and a bottom plate portion 44B that closes the upper end of the ring portion 44A. In the present embodiment, twelve winding coils 46 are provided in the stator core 43. Therefore, the bottom plate portion 44B has a through hole 48A through which the terminal 50A on one end side of the winding coil 46 passes, and the winding coil 46. Twelve through-holes 48B through which the other terminal 50B passes are formed.

  Here, the twelve winding coils 46 provided on the stator core 43 are each of the U phase, the V phase, and the W phase, and there are four winding coils 46 in each phase. In order to use the 12 winding coils 46 as an armature, all the terminals 50A on one side of the 12 winding coils 46 are connected to each other as a neutral point, and four windings for each phase are used. It is necessary to connect the terminals 50B on the other side of the coil. Therefore, as shown in FIGS. 2A and 2B, a holding groove 52 that holds a connection line that connects the terminals 50 is provided on the outer surface of the bottom plate portion 44 </ b> B of the terminal holder 44. The holding groove 52 includes a holding groove 52X that connects all the three-phase terminals 50A, a holding groove 52U that connects the U-phase terminals 50B of the winding coil 46, a holding groove 52V that connects the V-phase terminals 50B, There is a holding groove 52W connecting the W-phase terminal 50B.

  Here, as shown in FIG. 2B, the holding groove 52U is provided so as to connect four through-holes 48B through which the terminal 50B of the U-phase winding coil 46 passes, and similarly the holding groove 52V. , 52W are provided so as to connect four through holes 48B through which the terminals 50B of the V-phase and W-phase winding coils 46 pass. The holding groove 52X is provided so as to connect twelve through holes 48A through which the three-phase (U-phase, V-phase, W-phase) terminal 50A passes. Each holding groove 52 is curved in the circumferential direction of the bottom plate portion 44 </ b> B, and a part thereof is bent so as not to intersect the through hole 48 and the other holding grooves 52.

  A connection member 54 (see FIG. 2A) formed of a conductive metal plate is used as a connection line for electrically connecting the terminals 50 to each other. The connection member 54 is bent in accordance with the shape of the holding groove 52, and the connection member 54U corresponds to the holding groove 52U. Similarly, the connection members 54V, 54W, 54X correspond to the holding grooves 52V, 52W, 52X. Corresponds. Further, as shown in FIG. 3, each of the connecting members 54 includes a connecting portion 58 that is fitted in the holding groove 52 and serves as a connecting line, and a terminal contact that protrudes from the holding groove 52 and is fixed to the terminals 50A and 50B. And a contact portion 56. The connecting members 54U, 54V, 54W, and 54X are fitted in the holding grooves 52U, 52V, 52W, and 52X, respectively, and each terminal abutting portion 56 is abutted and fixed to the terminals 50A and 50B penetrating the through holes 48. The wire coil 46 can be used for connection between terminals.

  Further, as shown in FIG. 2A, conductive electrode plates 59U, 59V, and 59W are inserted into the holding grooves 52U, 52V, and 52W in which the connection members 54U, 54V, and 54W are fitted, respectively. The electrode plates 59U, 59V, 59W are connected to a drive circuit (not shown). When the electrode plates 59U, 59V, 59W are energized at a predetermined rotation from the drive circuit, the connection members 54U, 54V, 54W, 54X are used. Electricity is applied to the connected winding coils 46 of each phase, and a magnetic field can be generated. Based on the change in the magnetic field, the rotor 16 (see FIG. 1) rotates.

  Here, FIG. 4 shows an enlarged view of the connection member 54 fitted in the holding groove 52. The connecting member 54 is formed with a predetermined width (0.8 mm in the present embodiment), and the holding groove 52 is formed wider than the width of the connecting member 54 (1.5 mm in the present embodiment). Therefore, the connection member 54 cannot be held. Therefore, the holding groove 52 is provided with a triangular protrusion 60 as a holding means in the radial direction from the circumferential surface in the groove, and is held by making point contact with the connecting member 54. A plurality of projections 60 are provided at predetermined intervals suitable for stably holding the connection member 54. Further, the protrusion 60 closest to the terminal 50 of the winding coil 46 is on the side facing the terminal 50 with respect to the connection member 54 so as to support the terminal abutting portion 56 contacting the terminal 50 of the winding coil 46. It is provided on the opposite side. That is, as shown in FIG. 5A, when the through hole 48 is on the outer peripheral side with respect to the holding groove 52, the closest protrusion 60 is directed radially outward from the inner peripheral side surface of the holding groove 52. Accordingly, a force radially outward from the protrusion 60 is applied to the connection member 54, so that the contact of the terminal contact portion 56 of the connection member 54 with the terminal 50 can be supported. Further, as shown in FIG. 5B, when the through hole 48 is on the inner peripheral side with respect to the holding groove 52, the nearest protrusion 60 is provided radially inward from the peripheral surface on the outer peripheral side of the groove. Thus, the contact of the terminal contact portion 56 of the connection member 54 with the terminal 50 can be supported. Further, as shown in FIG. 5C, when the through hole 48 has both the inner peripheral side and the outer peripheral side with respect to the holding groove 52, the projection 60 closest to the inner peripheral side through hole 48 is formed. By providing the protrusion 60 closest to the through hole 48 on the outer peripheral side from the peripheral surface on the outer peripheral side toward the radially outer side from the peripheral surface on the inner peripheral side, the terminal contact of the connection member 54 is provided. The contact of the contact portion 56 with the terminal 50 can be supported. 5A, 5B, and 5C, only one holding groove 52 of the four holding grooves 52 is shown, and the other holding grooves 52 are omitted.

  Each holding groove 52 has a so-called taper shape in which the width of the groove becomes narrower as the depth increases as shown in FIG. Thereby, the position of the coupling portion 58 of the fitted connecting member 54 in the groove is stabilized according to the thickness in the width direction of the groove. Moreover, since the groove | channel width will become narrow if the connection part 58 is inserted deeply, the holding force holding the connection part 58 will increase, and the connection member 54 can be hold | maintained reliably.

  Next, the operation of this embodiment will be described.

  In the assembly work of the stator 18 of the motor unit 12 (see FIG. 2A), the winding coils 46 are wound around the slots 45 of the stator core 43, and the terminals 50A and 50B formed at the ends of the winding coils 46 are used. The terminal holder 44 is attached to the stator core 43 through the through holes 48 </ b> A and 48 </ b> B of the terminal holder 44.

  In the terminal holder 44, the connection members 54U, 54V, 54W, and 54X are fitted into the corresponding holding grooves 52U, 52V, 52W, and 52X in order to connect the terminals 50A and 50B penetrating the through holes 48A and 48B. At this time, since the holding grooves 52U, 52V, 52W, 52X are wider than the connection members 54U, 52V, 52W, 52X, the connection grooves 54U, 54V, 54W, 54X or the holding grooves 52U, 52V, 52W, 52X are a little. Even if there is a deformation, it can be easily fitted. Further, the fitted connection members 54U, 54V, 54W, 54X are stably held because they are in contact with the protrusions 60 (see FIG. 4) in the holding grooves 52U, 52V, 52W, 52X.

  Each of the terminal contact portions 56 (see FIG. 2A) of the inserted connection members 54U, 54V, 54W, and 54X is contacted and fixed to the terminals 50A and 50B of the winding coils 46, thereby connecting the connection members. 54X is a neutral point where the terminals on one side of the 12 winding coils 46 are connected, and the connection members 54U, 54V, 54W are connection lines connecting the terminals on the other side of the same phase of the winding coil 46, A three-phase, 12-slot stator 18 can be configured.

  As described above, according to the terminal holder 44 of the present embodiment, the holding groove 52 is made wider than the connection member 54, thereby facilitating assembly work and improving work efficiency. The connecting member 54 can also be held stably. In addition, since it is not necessary to set the dimensional tolerance between the connecting member 54 and the holding groove 52 strictly, the manufacturing cost of the parts is reduced.

  The protrusion 60 of the present embodiment has a triangular shape and makes point contact with the connection member 54. However, as shown in FIGS. 7A and 7B, the protrusion 60 has other shapes such as a semicircular shape and a rectangular shape. It may be. Further, the protrusion 60 may be provided in a rib shape continuously in the depth direction of the holding groove 52, and the contact portion may be in line contact or surface contact. Further, as shown in FIG. 8, a claw-shaped holder 70 may be provided with a resin material inside the holding groove 52, and the connection member 54 may be sandwiched and held.

  In this embodiment, a brushless motor is taken as an example. However, a holding groove 52 and holding means are provided in a terminal holder 44 in which a terminal 50 of a winding coil 46 of another motor is embedded, and the connection member 54 is used for connection. It may be.

  Further, in the present embodiment, the connection member 54 is plate-shaped, but a conductive wire or other connection wire may be used.

It is sectional drawing of the canned motor pump which concerns on this Embodiment. It is the perspective view (A) of the stator which concerns on this Embodiment, and the top view (B) of a terminal holder. It is a perspective view of the connection member concerning this embodiment. It is an enlarged view of the holding groove | channel which fitted the connection member which concerns on this Embodiment. It is a position pattern figure of the processus | protrusion provided in the holding groove | channel which concerns on this Embodiment. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 4 according to the present embodiment. It is a shape pattern figure of the processus | protrusion provided in the holding groove | channel which concerns on this Embodiment. It is a figure which shows the holding groove | channel provided with the nail | claw shape which concerns on this Embodiment.

Explanation of symbols

10 Canned motor pump, 12 Motor part, 14 Pump part, 16 Rotor, 18 Stator, 20 Can, 22 Iron yoke, 24 Rotor magnet, 26 Resin part, 28 Heat sink, 30A O-ring, 30B O-ring, 32 External Case, 34 Shaft holding part, 36 Shaft, 38 Bearing, 40 Impeller, 41 Suction hole, 42 Pump chamber, 43 Stator core (iron core), 44 Terminal holder (terminal support member), 44A Ring part, 44B Bottom plate part, 45 slot, 46 Winding coil, 48 Insertion hole, 50 Terminal, 52 Holding groove (groove), 54 Connection member, 56 Terminal contact part, 58 Connecting part, 59 Electrode plate, 60 Protrusion (holding means), 70 Holder

Claims (4)

A winding coil is arranged in each of the regions equally divided along the circumferential direction of the cylindrical iron core, and the terminals of the plurality of winding coils are electrically connected to each other to form an armature. A stator that generates a magnetic field by energizing the wire coil at a predetermined rotation;
A permanent magnet arranged coaxially opposite to the inner or outer peripheral surface of the stator, alternately arranged with different magnetic poles along the circumferential direction, and configured to rotate based on the change in the magnetic field. A motor,
The stator is
A streak-shaped groove portion that is mounted coaxially with the stator so that the end faces are butted, and terminals formed at the ends of the plurality of winding coils are embedded, and the terminals are spatially communicated with each other. An insulating terminal support member formed with
A conductive connection member that is loosely fitted in the groove and electrically connects the predetermined terminals;
A motor comprising: a holding means that suppresses and holds the connection member loosely fitted in the groove portion within the groove portion and the drop-off from the groove portion.   The motor according to claim 1, wherein the holding means is a protrusion formed in the groove portion so as to come into contact with the connection member at predetermined intervals.   3. The motor according to claim 2, wherein the protrusion closest to the terminal comes into contact with the connection member from a side opposite to the side facing the terminal to bring the connection member closer to the terminal side.   The motor according to any one of claims 1 to 3, wherein the groove portion has a shape that becomes narrower as the groove portion becomes deeper.

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