JP2015027240A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stable anti-corrosive effect to a coupling part of a circuit terminal with an end of a winding or a coupling member.SOLUTION: In a rotary electric machine 10, a first coupling part 100 is covered with a first cover 106, and a second coupling part 102 and a third coupling part 104 are covered with a second cover 108. Moreover, a seal material 107 is filled inside the first cover 106 and the second cover 108, and the first coupling part 100 to the third coupling part 104 are coated by the seal material 107. This prevents the occurrence of corrosion in the first coupling part 100 to the third coupling part 104. Further, since the first cover 106 and the second cover 108 receive the seal material 107, a sealed state in a first opening 106A of the first cover 106 and a second opening 108A of the second cover 108 can be stabilized. Consequently, an anti-corrosive effect to the first coupling part 100 to the third coupling part 104 by the seal material 107 can be stabilized.

Description

  The present invention relates to a rotating electrical machine.

  In the motor described in Patent Document 1 below, the winding terminal portion of the winding wound around the tooth portion extends to one side in the axial direction of the motor and is held by the winding holding portion. And the coil | winding terminal part hold | maintained by the coil | winding holding | maintenance part is connected with the circuit terminal of the circuit apparatus via the bus-bar (connection member).

  By the way, in general, a copper wire having high conductivity is used for the above-described winding. For example, by using a winding made of a metal mainly composed of aluminum, the motor can be reduced in weight and cost. You can plan.

JP 2010-273450 A

  However, if the winding is made of a metal whose main component is aluminum, the following concerns can be considered. That is, for example, when a bus bar or a circuit terminal made of a metal different from the winding and the winding are coupled, there is a possibility that the coupling portion corrodes and poor conduction occurs. On the other hand, by applying a sealing material or the like to the joint portion, occurrence of corrosion at the joint portion can be suppressed. However, if variation occurs in the application (coating) state of the sealing material to the joint portion, a stable anticorrosion effect may not be obtained for the joint portion.

  In view of the above facts, an object of the present invention is to provide a rotating electrical machine capable of obtaining a stable anticorrosion effect with respect to a terminal portion of a winding in a circuit terminal or a joint portion with a connecting member.

  The rotating electrical machine according to claim 1 is composed of a drive circuit case that covers a drive circuit unit that drives a motor unit and is a sealed circuit chamber, and a conductive metal that is different from aluminum. A circuit terminal coupled to the drive circuit unit in the circuit chamber, a circuit terminal extending from the drive circuit case and having the other end exposed outside the drive circuit case, and an armature core in the motor unit Wrapped around the tooth portion, composed of a metal mainly composed of aluminum, and the terminal portion is coupled to the other end of the circuit terminal directly or via a connecting member composed of a metal composed mainly of aluminum. A winding, a cover that covers a terminal portion of the winding in the circuit terminal or a coupling portion with the connecting member, and a sealing material that hermetically seals the opening of the cover. That.

  According to the rotating electrical machine of the first aspect, the inside of the drive circuit case is a sealed circuit chamber, and the drive circuit section is accommodated in the circuit chamber. The drive circuit section is provided with a circuit terminal. One end of the circuit terminal is coupled to the drive circuit section in the circuit chamber, and the other end of the circuit terminal is exposed outside the drive circuit case. And the circuit terminal is comprised with the electroconductive metal different from aluminum.

  In addition, a winding is wound around the tooth portion of the armature core in the motor portion. And the terminal part of this coil | winding is couple | bonded with the other end part of the circuit terminal directly or through the connection member, and the coil | winding and the connection member are comprised with the metal which has aluminum as a main component. For this reason, the coil | winding or connection member comprised with the metal which has aluminum as a main component is couple | bonded with the circuit terminal comprised with the electroconductive metal different from aluminum in the outer side of a drive circuit case.

  Here, the terminal part of the coil | winding in a circuit terminal or the coupling | bond part with a connection member is covered with the cover, and the opening part of the cover is liquid-tightly sealed with the sealing material. For this reason, the inside of a cover can be made into an airtight state with a sealing material, or a sealing material can be filled in the cover. Thereby, generation | occurrence | production of the corrosion in the said connection part is suppressed. Moreover, since the sealing material can be received by the cover, for example, the sealed state at the opening of the cover can be stabilized. Therefore, the anticorrosive effect with respect to the said connection part by a sealing material can be stabilized.

  According to a second aspect of the present invention, in the rotating electric machine according to the first aspect, the sealing material is filled in the cover to cover the coupling portion.

  According to the rotating electric machine of the second aspect, since the sealing material is filled in the cover and covers the coupling portion, the coupling portion can be covered with the sealing material while receiving the sealing material by the cover.

  According to a third aspect of the present invention, in the rotating electric machine according to the second aspect, the cover is formed in a cylindrical shape having an opening, and the sealing material is exposed through the opening.

  According to the rotating electrical machine of the third aspect, the sealing material can be filled into the cover from the opening of the cover. Thereby, workability | operativity at the time of filling a sealing material in a cover can be improved.

  The rotating electrical machine according to claim 4 is the rotating electrical machine according to any one of claims 1 to 3, further comprising a holding member that holds a terminal portion of the winding, and the cover includes the holding member. It is integrally formed.

  According to the rotating electric machine according to claim 4, since the cover is integrally formed on the holding member that holds the terminal portion of the winding, the terminal of the winding in the circuit terminal is suppressed while suppressing the cost increase of the rotating electric machine. A stable anticorrosive effect can be obtained with respect to the joint portion with the portion or the connecting member.

  The rotating electrical machine according to claim 5 is the rotating electrical machine according to any one of claims 1 to 4, wherein a terminal portion of the winding is coupled to the circuit terminal via the connecting member. .

  According to the rotating electrical machine according to claim 5, for example, by providing a cover in an existing rotating electrical machine having a connecting member, the winding and the connecting member can be easily replaced with a metal mainly composed of aluminum. In addition, a stable anticorrosion effect can be realized for the joint between the connecting member and the circuit terminal. Further, it is not necessary to extend the circuit terminal to the end of the winding. For this reason, the protrusion amount of the circuit terminal from the drive circuit case can be reduced, and the shape of the circuit terminal can be simplified.

  The rotating electrical machine according to claim 6 is the rotating electrical machine according to claim 5, wherein a terminal portion branched into a plurality of portions is formed at one end of the circuit terminal, and the terminal portion is coupled to the drive circuit portion. In addition, the other end of the circuit terminal is coupled to the connecting member.

  According to the rotating electrical machine of the sixth aspect, in the circuit terminal coupled to the drive circuit unit at a plurality of locations, the number of locations where the coupling member is coupled can be set small.

  The rotating electrical machine according to claim 7 is the rotating electrical machine according to claim 1, further comprising a holding member that holds a terminal portion of the winding, and the cover is a bottomed cylindrical shape that is open to the holding member side. The sealing material liquid-tightly seals between the outer edge of the opening of the cover and the holding member.

  According to the rotary electric machine of the seventh aspect, the cover has a bottomed cylindrical shape opened to the holding member side that holds the terminal portion of the winding. The space between the outer edge of the opening and the holding member is hermetically sealed with a sealing material. For this reason, since it is sufficient to ensure the sealing performance between the outer edge of the opening and the holding member, the amount of sealing material used can be reduced. In addition, since it is not necessary to cover the coupling portion with the sealing material, for example, it is possible to prevent the repeated stress from acting on the coupling portion due to thermal expansion and thermal contraction of the sealing material.

  The rotating electrical machine according to claim 8 is the rotating electrical machine according to claim 7, wherein the sealing material is configured as a resin material having fluidity, and the holding member has an outer edge of the opening of the cover. On the outside, a cylindrical partition is formed.

  According to the rotating electrical machine of the eighth aspect, since the flow of the sealing material is blocked by the partition wall, the sealing material can be prevented from flowing out to an unintended range on the holding member.

  The rotating electrical machine according to claim 9 is the rotating electrical machine according to claim 7, wherein the sealing material is configured as a resin material having fluidity, and the cover has an outer edge than the outer edge of the opening of the cover. On the outside, a cylindrical partition is formed.

  According to the rotary electric machine of the ninth aspect, since the flow of the sealing material is blocked by the partition wall, the sealing material can be prevented from flowing out to an unintended range on the holding member.

  The rotating electrical machine according to claim 10 is the rotating electrical machine according to any one of claims 7 to 9, wherein the cover has a communication hole communicating between the inside of the cover and the outside of the cover. Is formed.

  According to the rotating electrical machine of the tenth aspect, for example, the state in the cover can be confirmed from the communication hole. Further, for example, by injecting compressed air or the like into the cover through the communication hole, it is possible to inspect whether or not the opening portion of the cover and the holding member are sealed in a liquid-tight state.

It is the top view seen from the axial direction one side of the rotary electric machine which shows the principal part of the rotary electric machine which concerns on 1st Embodiment. It is a perspective view which shows the principal part of the rotary electric machine shown by FIG. It is a sectional side view which shows the principal part of the rotary electric machine shown by FIG. It is a perspective view which shows the 1st circuit terminal and 2nd circuit terminal which are used for the circuit electricity shown by FIG. (A) is the enlarged view (5A section enlarged view of FIG. 1) which shows the state with which the 1st coupling | bond part shown by FIG. 1 was covered with the 1st cover, (B) is the 1st shown by FIG. It is an enlarged view (5B part enlarged view of FIG. 1) which shows the state by which the 2 coupling | bond part and the 3rd coupling part were covered with the 2nd cover. It is a sectional side view (side sectional view corresponding to FIG. 1) which shows the principal part of the rotary electric machine which concerns on 2nd Embodiment. (A) is a perspective view which shows the state by which the 1st coupling | bond part of the rotary electric machine which concerns on 3rd Embodiment was covered with the 1st cover, (B) rotated the state shown by (A). It is the top view seen from the axial direction one side of the electric machine. (A) is a perspective view which shows the state by which the 1st coupling | bond part of the rotary electric machine which concerns on 4th Embodiment was covered with the 1st cover, (B) rotated the state shown by (A). It is the top view seen from the axial direction one side of the electric machine. (A) is a perspective view which shows the state by which the 1st coupling | bond part of the rotary electric machine which concerns on 5th Embodiment was covered with the 1st cover, (B) rotated the state shown by (A). It is the top view seen from the axial direction one side of the electric machine. (A) is a perspective view which shows the state by which the 1st coupling | bond part of the rotary electric machine which concerns on 6th Embodiment was covered with the 1st cover, (B) rotated the state shown by (A). It is the top view seen from the axial direction one side of the electric machine.

  (First embodiment)

  Hereinafter, the rotating electrical machine 10 according to the first embodiment will be described with reference to FIGS. The rotating electrical machine 10 is a so-called outer rotor type brushless motor, and includes a motor body 12 as a “motor unit” and a circuit device 50.

  As shown in FIGS. 1 to 3, the motor main body 12 includes a substantially triangular plate-like center piece 14, and the center piece 14 is arranged with the plate thickness direction being the axial direction of the motor main body 12. Further, the center piece 14 is formed symmetrically with respect to the orthogonal axis Cx (see FIG. 1) passing through the axis of the motor body 12 when viewed from the axial direction of the motor body 12. Further, an attachment portion 16 for attaching a circuit device 50 described later is formed at one end portion (the end portion on the arrow D direction side in FIG. 1 and the like) of the center piece 14. The attachment portion 16 extends in the axial direction of the orthogonal axis Cy that is orthogonal to the orthogonal axis Cx when viewed from the axial direction of the motor body 12.

  As shown in FIG. 3, a shaft portion 18 is integrally formed at a substantially central portion of the center piece 14, and the shaft portion 18 is on one side in the axial direction of the motor body 12 (arrow A in FIG. 3). It is formed in a substantially bottomed cylindrical shape protruding toward the direction side. One end portion of the motor shaft 20 is fitted into the shaft portion 18, and the motor shaft 20 is fixed to the center piece 14 so as not to rotate.

  Furthermore, the motor body 12 includes a rotor 22. The rotor 22 has a rotor housing 24, and the rotor housing 24 is formed in a substantially bottomed cylindrical shape opened to one side in the axial direction of the motor body 12. A substantially cylindrical fixing portion 26 is formed at the center of the rotor housing 24, and the other end of the motor shaft 20 is supported on the fixing portion 26 via a bearing 28. Thereby, the rotor 22 is configured to be rotatable with respect to the motor shaft 20. A magnet 30 is fixed to the inner peripheral surface of the rotor housing 24.

  Further, an armature core 34 of a stator 32 that constitutes a part of the motor body 12 is accommodated inside the rotor housing 24, and the armature core 34 is supported by the center piece 14. The armature core 34 has a plurality of tooth portions 36, and the tooth portions 36 are formed radially about the motor shaft 20.

  A plurality of windings 38 are wound around the tooth portion 36. The winding 38 is made of a wire made of a metal whose main component is aluminum (1000 series defined in the JIS standard), and constitutes the U phase, the V phase, and the W phase of the motor body 12, respectively. Yes. As shown in FIGS. 1 and 2, the winding terminal portions 40 </ b> A to 40 </ b> F of the windings 38 that form a pair are extended from the motor body 12 to one side in the axial direction of the motor body 12. . Specifically, the six winding terminal portions 40 </ b> A to 40 </ b> F are arranged at equal intervals (every 60 °) in the circumferential direction of the motor body 12 when viewed from the axial direction of the motor body 12. The two winding terminal portions 40 </ b> A and 40 </ b> D are disposed on the orthogonal axis Cy as viewed from the axial direction of the motor body 12.

  A holding member 42 is provided on one side of the motor body 12 in the axial direction, and the holding member 42 is supported by the center piece 14. The holding member 42 is made of an insulating material and is formed in a substantially concave shape having a shallow bottom opened to one side in the axial direction of the motor body 12. Further, the holding member 42 is formed with a plurality of (six places in the present embodiment) winding holding portions 44 for holding the winding terminal portions 40A to 40F. It arrange | positions in the position corresponding to each of terminal part 40A-40F. The winding holding portion 44 is formed in a substantially cylindrical shape, and the winding terminal portions 40 </ b> A to 40 </ b> F are inserted and held in the winding holding portion 44.

  The circuit device 50 is disposed on one side in the axial direction of the motor main body 12 and is shifted to the attachment portion 16 side of the center piece 14 when viewed from the axial direction of the motor main body 12. The circuit device 50 includes a substantially rectangular plate-like base portion 52 that is fixed to the attachment portion 16 of the centerpiece 14, a drive circuit case 54 that is disposed on one side in the axial direction of the motor body 12 with respect to the base portion 52, It is comprised including. The drive circuit case 54 is formed in a substantially rectangular box shape opened to the other axial side of the motor body 12 (the arrow B direction side in FIG. 2) (in FIG. 2, for convenience, the bottom of the drive circuit case 54 is formed). The base portion 52 and the drive circuit case 54 are assembled in a state where the space between the drive circuit case 54 and the base portion 52 is sealed. The space inside the drive circuit case 54 is a circuit chamber 56, and the circuit chamber 56 is sealed by the base portion 52 and the drive circuit case 54. That is, the waterproof property of the circuit chamber 56 is ensured.

  In the circuit chamber 56, a circuit board 58 serving as a “circuit driving unit” is accommodated, and the circuit board 58 is fixed to the base part 52. The circuit board 58 is provided with a pair of first circuit terminals 60 </ b> A and 60 </ b> B and a second circuit terminal 70 as “circuit terminals” at the end on the motor body 12 side. The first circuit terminals 60A and 60B and the second circuit terminal 70 are made of a metal whose main component is copper (brass in the present embodiment), and the first circuit terminals 60A and 60B and the second circuit terminal. The surface of 70 is tin-plated. Further, the first circuit terminals 60A and 60B and the second circuit terminal 70 are arranged in the axial direction of the orthogonal axis Cy, and the second circuit terminal 70 is disposed between the pair of first circuit terminals 60A and 60B. Each configuration will be described below.

  As shown in FIGS. 1 and 2, the pair of first circuit terminals 60 </ b> A and 60 </ b> B are formed in a substantially long plate shape, and are arranged with the longitudinal direction being the axial direction of the orthogonal axis Cx (see FIG. 1). And symmetrically formed with respect to the orthogonal axis Cx. Further, as shown in FIG. 4, the first circuit terminals 60A and 60B include a first circuit terminal base 62 that constitutes a portion on one side in the longitudinal direction (circuit chamber 56 side) and the other side in the longitudinal direction ( And a first circuit terminal connection portion 64 that constitutes a portion of the motor main body 12 side). The first circuit terminals 60A and 60B are integrally formed by insert molding on the side wall of the drive circuit case 54 on the motor body 12 side in the middle portion in the longitudinal direction. Accordingly, one end portions of the first circuit terminals 60A and 60B are disposed in the drive circuit case 54 (circuit chamber 56), and the other end portions of the first circuit terminals 60A and 60B are disposed in the drive circuit case 54 (circuit chamber 56). ) Is exposed outside.

  The first circuit terminal base 62 is arranged with the plate thickness direction being the axial direction of the motor body 12. In addition, one end portion (end portion on the circuit chamber 56 side) of the first circuit terminal base portion 62 is branched into a plurality of (four in the present embodiment) in a substantially comb shape, and this portion serves as a terminal portion 62A. ing. Each terminal portion 62A is bent at a substantially right angle toward the circuit board 58 and is coupled (soldered) to the circuit board 58.

  The first circuit terminal connecting portion 64 is arranged with the plate thickness direction being the axial direction of the orthogonal axis Cy (see FIG. 1), and from the one end in the width direction at the other end of the first circuit terminal base 62 to the motor body 12 side. It extends to. The first circuit terminal connection portion 64 is formed in a substantially L shape with a tip portion protruding toward one axial side of the motor body 12 in a side view.

  The second circuit terminal 70 is formed in a substantially long plate shape, and is bent in a substantially crank shape so as to approach the first circuit terminal 60 </ b> B when viewed from the axial direction of the motor body 12. The second circuit terminal 70 includes a second circuit terminal base 72 that constitutes a part on one side in the longitudinal direction (circuit chamber 56 side) and a second part that constitutes a part on the other side in the longitudinal direction (motor body 12 side). And a two-circuit terminal connection unit 74. Similarly to the first circuit terminals 60A and 60B, the second circuit terminal 70 is integrally formed by insert molding on the side wall of the drive circuit case 54 on the motor body 12 side in the middle portion in the longitudinal direction. As a result, one end of the second circuit terminal 70 is disposed in the drive circuit case 54 (circuit chamber 56), and the other end of the second circuit terminal 70 is located outside the drive circuit case 54 (circuit chamber 56). Exposed.

  The second circuit terminal base portion 72 is arranged with the plate thickness direction being the axial direction of the motor main body 12, and is bent in a substantially L shape when viewed from the axial direction of the motor main body 12. Similarly to the first circuit terminals 60A and 60B, one end (the end on the circuit chamber 56 side) of the second circuit terminal base 72 is branched into a plurality of comb shapes (four in this embodiment). This portion is a terminal portion 72A. Each terminal portion 72A is bent at a substantially right angle toward the circuit board 58 and is coupled (soldered) to the circuit board 58.

  The second circuit terminal connecting portion 74 is arranged with the plate thickness direction being the axial direction of the orthogonal axis Cy (see FIG. 1), and extends from the other end portion of the first circuit terminal base portion 62 to the motor body 12 side. The first circuit terminal connection portion 64 is formed in a substantially L shape with a tip portion protruding toward one axial direction of the motor body 12 in a side view, and the first circuit of the first circuit terminal 60B. It is arranged in the vicinity of the terminal connection portion 64 and in parallel with the first circuit terminal connection portion 64.

  As shown in FIGS. 1 and 2, the circuit board 58 includes winding terminal portions 40 </ b> A to 40 </ b> F of the winding 38 via a pair of first bus bars 80 and second bus bars 90 as “connection members”. It is connected. The first bus bar 80 and the second bus bar 90 are made of a metal mainly composed of aluminum (1000 series defined in the JIS standard). Each configuration will be described below.

  The first bus bar 80 is disposed on the motor main body 12 side with respect to the pair of first circuit terminals 60A and 60B, and includes a first bus bar main body portion 82 and a first bus bar coupling portion 84. . The first bus bar main body portion 82 of the pair of first bus bars 80 is formed in a substantially long plate shape and is stepped so as to be symmetrical with respect to the orthogonal axis Cx when viewed from the axial direction of the motor main body 12. It is bent (see FIG. 1). Specifically, one end (the end on the circuit device 50 side) of the first bus bar main body 82 is disposed with the plate thickness direction as the axial direction of the orthogonal axis Cy, and other than the first circuit terminals 60A and 60B. The ends are joined by projection welding or the like. Then, when viewed from the axial direction of the motor main body 12, the intermediate portion in the longitudinal direction of the first bus bar main body 82 approaches the orthogonal axis Cx as it goes to the side opposite to the circuit device 50 (the direction of arrow C in FIG. 1 and the like). Thus, it is bent and formed in a substantially crank shape (see FIG. 1). Furthermore, the other end of the first bus bar main body 82 (the end opposite to the circuit device 50) is disposed with the plate thickness direction as the axial direction of the orthogonal axis Cy.

  The first bus bar coupling portion 84 is integrally formed with the longitudinal intermediate portion of the pair of first bus bar main body portions 82 and the other end portion of the first bus bar main body portion 82, and the winding terminal portions 40A, 40B, 40C. , 40D are arranged at positions adjacent to each other. The first bus bar coupling portion 84 extends from the first bus bar main body portion 82 to one side in the axial direction of the motor main body 12 and is opened to the opposite side to the circuit device 50 when viewed from the axial direction of the motor main body 12. It is bent into a letter shape. And winding terminal part 40A, 40B, 40C, 40D is each inserted in the 1st bus-bar coupling part 84, and winding terminal part 40A, 40B, 40C, 40D and the 1st bus-bar coupling part 84 are TIG welding etc. Are bound by. Thereby, the first circuit terminal 60A and the winding terminal portions 40A and 40B are connected (coupled) by one first bus bar 80, and the first circuit terminal 60B and the winding terminal portion are connected by the other first bus bar 80. 40C and 40D are connected (linked).

  The second bus bar 90 is disposed on the motor body 12 side with respect to the second circuit terminal 70, and includes a second bus bar body 92 and a second bus bar coupling portion 94. The second bus bar main body 92 is formed in a substantially long plate shape, and is disposed with the width direction of the second bus bar main body 92 being the axial direction of the motor main body 12. It is bent. Specifically, the one end portion, the longitudinal intermediate portion, and the other end portion of the second bus bar main body portion 92 are arranged in parallel with each other with the plate thickness direction being the axial direction of the orthogonal axis Cy. One end of the second bus bar main body 92 is coupled to the other end of the second circuit terminal 70 by projection welding or the like. Moreover, the longitudinal direction intermediate part and other end part of the 2nd bus-bar main-body part 92 are arrange | positioned adjacent to the winding terminal parts 40E and 40F, respectively.

  The second bus bar coupling portion 94 is integrally formed at the longitudinal intermediate portion and the other end portion of the second bus bar main body portion 92, and is disposed at a position adjacent to the winding terminal portions 40E and 40F. The second bus bar coupling portion 94 extends from the second bus bar main body portion 92 to one side in the axial direction of the motor main body 12 and is opened to the side opposite to the circuit device 50 when viewed from the axial direction of the motor main body 12. It is bent into a letter shape. The winding terminal portions 40E and 40F are inserted into the second bus bar coupling portion 94, and the winding terminal portions 40E and 40F and the second bus bar coupling portion 94 are coupled by TIG welding or the like. Thereby, the second circuit terminal 70 and the winding terminal portions 40E and 40F are connected (linked) by the second bus bar 90.

  As shown in FIG. 5A, the coupling portion between the first circuit terminal 60 </ b> A and the first bus bar 80 is a first coupling portion 100 as a “coupling portion”. The first coupling portion 100 is covered with a first cover 106 as a “cover”. The first cover 106 is made of an insulating material and is formed in a substantially rectangular tube shape penetrating in the axial direction of the motor body 12. The end of the first cover 106 on one side of the motor body 12 in the axial direction is a first opening 106A as an “opening”, and the end of the first cover 106 on the other side in the axial direction of the motor body 12 is The first opening 106 </ b> B serves as an “opening”. In addition, the end of the first cover 106 on the other side in the axial direction of the motor body 12 is integrally fixed to the holding member 42, and the first opening 106 </ b> B is closed by the holding member 42. Further, the first cover 106 is filled with a sealing material 107 (for example, an epoxy adhesive having fluidity), and the first opening 106A is liquid-tightly sealed by the sealing material 107, and The first coupling part 100 is covered with the sealing material 107. Although illustration is omitted, a slit through which the first circuit terminal 60 </ b> A and the first bus bar 80 are inserted is formed on the side wall of the first cover 106.

  Further, as shown in FIG. 5B, the coupling portion between the first circuit terminal 60B and the first bus bar 80 and the coupling portion between the second circuit terminal 70 and the second bus bar 90 are respectively “coupling portions”. As a second coupling portion 102 and a third coupling portion 104. The second coupling portion 102 and the third coupling portion 104 are covered with a second cover 108 as a “cover”. The second cover 108 is made of an insulating material and has a substantially cylindrical shape penetrating in the axial direction of the motor body 12. The second cover 108 is divided into two regions so as to accommodate the second coupling part 102 and the third coupling part 104, respectively. Further, the end of one side in the axial direction of the motor body 12 in the second cover 108 is a second opening 108A as an “opening”, and the end of the other side in the axial direction of the motor body 12 in the second cover 108 is The second opening 108B as an “opening” is used. The end of the second cover 108 on the other side of the motor body 12 in the axial direction is integrally fixed to the holding member 42, and the second opening 108 </ b> B is blocked by the holding member 42. Further, the second cover 108 is filled with a sealing material 107 (same as the sealing material 107 in the first cover 106), and the second opening 108A is liquid-tightly sealed by the sealing material 107, and The second coupling portion 102 and the third coupling portion 104 are covered with the sealing material 107. Although not shown, a slit through which the first circuit terminal 60B, the first bus bar 80, the second circuit terminal 70, and the second bus bar 90 are inserted is also formed on the side wall of the second cover 108.

  Further, as shown in FIG. 3, the motor body 12 described above includes a lid portion 110, and the lid portion 110 is disposed on one side of the holding body 42 in the axial direction of the motor body 12, and is attached to the center piece 14. It is fixed. And the coil | winding terminal part 40A-40F, the 1st bus bar 80, and the 2nd bus bar 90 are covered with the cover part 110. FIG. A pair of ribs 112 is formed on the outer periphery of the lid 110, and the ribs 112 protrude from the lid 110 to the other side in the axial direction of the motor body 12. Thereby, the outer peripheral part of the cover part 110 becomes a maze structure (what is called a labyrinth structure), and is comprised so that the waterproofness in the holding member 42 may be ensured.

  Next, the operation and effect of the present embodiment will be described.

  In the rotating electrical machine 10 configured as described above, the circuit board 58 is accommodated in the circuit chamber 56, and the circuit board 58 includes the first circuit terminals 60 </ b> A and 60 </ b> B and the second circuit terminal 70 made of brass. Is provided. Further, the winding 38 of the motor body 12, the pair of first bus bars 80, and the second bus bars 90 are each made of a metal whose main component is aluminum.

  Further, the first circuit terminal 60A and the winding terminal portions 40A and 40B are connected (coupled) by one first bus bar 80, and the first circuit terminal 60B and the winding terminal portion 40C are connected by the other first bus bar 80. , 40D are connected (linked). Further, the second circuit bar 70 and the winding terminal portions 40E and 40F are connected (linked) by the second bus bar 90. Then, a coupling portion between the first circuit terminal 60A and the first bus bar 80, a coupling portion between the first circuit terminal 60B and the first bus bar 80, and a coupling portion between the second circuit terminal 70 and the second bus bar 90 are respectively provided. The first coupling unit 100, the second coupling unit 102, and the third coupling unit 104.

  Here, the first coupling part 100 is covered by the first cover 106, and the second coupling part 102 and the third coupling part 104 are covered by the second cover 108. The first cover 106 and the second cover 108 are filled with a sealing material 107. Therefore, the first opening 106A of the first cover 106 and the second opening 108A of the second cover 108 are liquid-tightly sealed by the sealing material 107, and the first coupling portion 100 to the third coupling portion 104 are sealed. Covered by a material 107. Thereby, generation | occurrence | production of the corrosion in the 1st coupling | bond part 100, the 2nd coupling | bond part 102, and the 3rd coupling | bond part 104 can be suppressed. In addition, since the first cover 106 and the second cover 108 receive the sealing material 107, the sealed state in the first opening 106A of the first cover 106 and the second opening 108A of the second cover 108 can be stabilized. Therefore, the anticorrosion effect with respect to the 1st coupling | bond part 100, the 2nd coupling | bond part 102, and the 3rd coupling | bond part 104 by the sealing material 107 can be stabilized.

  In addition, as described above, the winding terminal portions 40A to 40F are coupled to the first circuit terminals 60A and 60B and the second circuit terminal 70 via the connecting members (a pair of the first bus bar 80 and the second bus bar 90). Has been. For this reason, for example, in an existing rotating electrical machine having a connecting member, by providing the first cover 106 and the second cover 108, the winding and the connecting member can be easily replaced with a metal mainly composed of aluminum. In addition, a stable anticorrosion effect can be realized for the joint between the connecting member and the circuit terminal. Further, it is not necessary to extend the first circuit terminals 60A and 60B and the second circuit terminal 70 to the winding terminal portions 40A to 40F. For this reason, the protrusion amounts of the first circuit terminals 60A, 60B and the second circuit terminal 70 from the drive circuit case 54 can be reduced, and the shapes of the first circuit terminals 60A, 60B and the second circuit terminal 70 can be simplified.

  Further, the first cover 106 is formed in a cylindrical shape having a first opening 106A, and the second cover 108 is formed in a cylindrical shape having a pair of second openings 108A. Accordingly, since the sealing material 107 can be filled from the first opening 106A and the second opening 108A, workability when filling the sealing material 107 into the first cover 106 and the second cover 108 can be improved.

  A terminal portion 62A (terminal portion 72A) branched into a plurality of portions is formed at one end of the first circuit terminals 60A and 60B (second circuit terminal 70), and the terminal portion 62A (terminal portion 72A) is formed. The circuit board 58 is coupled (soldered). Thereby, in 1st circuit terminal 60A, 60B (2nd circuit terminal 70) couple | bonded with the circuit board 58 in several places, the coupling | bond location with the 1st bus bar 80 (2nd bus bar 90) can be set few.

  Further, the first bus bar 80 (second bus bar 90) includes two first bus bar coupling portions 84 (second bus bar coupling portions 94) coupled to the winding terminal portions 40A to 40F, the first circuit terminals 60A, 60B (second circuit terminal 70) and one coupling portion. For this reason, since the number of the coupling | bonding locations (the 1st coupling | bond part 100-the 3rd coupling | bond part 104) of dissimilar metals can be reduced compared with the coupling | bonding location of the same kind metals, the reliability in the rotary electric machine 10 can be improved.

  The surface of the circuit terminals (the first circuit terminals 60A and 60B and the second circuit terminal 70) is tin-plated. For this reason, the corrosion in the 1st coupling | bond part 100-the 3rd coupling | bond part 104 can be suppressed effectively. That is, if tin plating is omitted in the circuit terminal, the potential difference (about 0.5 V) between the circuit terminal where the tin plating is omitted and the connecting member (first bus bar 80 and second bus bar 90) is It becomes larger than the potential difference (about 0.25 V) between the plating portion of the circuit terminal on which the tin plating is applied and the connecting member. Therefore, by applying tin plating to the circuit terminal, the potential difference in the first coupling portion 100 to the third coupling portion 104 can be set small. Thereby, the corrosion in the 1st coupling | bond part 100-the 3rd coupling | bond part 104 can be suppressed effectively.

(Second Embodiment)

  Hereinafter, the rotating electrical machine 200 according to the second embodiment will be described with reference to FIG. 6. The rotating electrical machine 200 of the second embodiment is configured in the same manner as the rotating electrical machine 10 of the first embodiment except for the following points.

  That is, a junction terminal cover 202 as a “cover” is provided between the motor body 12 and the drive circuit case 54. The junction terminal cover 202 is formed in a substantially rectangular tube shape penetrating in the axial direction of the motor main body 12 and is integrally fixed to the drive circuit case 54 by a snap fit or the like. Further, the end of the joining terminal cover 202 on the other side in the axial direction of the motor main body 12 is closed by the base portion 52. A sealing property is ensured at a fixing portion of the joining terminal cover 202 to the drive circuit case 54.

  Further, in the rotating electrical machine 200, the first cover 106 and the second cover 108 are omitted, and the first coupling portion 100 to the third coupling portion 104 are disposed in the joining terminal cover 202. That is, one end portion of the first bus bar main body portion 82 and one end of the second bus bar main body portion 92 extend toward the drive circuit case 54 as compared with the first embodiment, and are respectively connected to the first circuit in the junction terminal cover 202. Coupled to terminals 60A, 60B and second circuit terminal 70.

  The joining terminal cover 202 is filled with the sealing material 107, and the first coupling portion 100 to the third coupling portion 104 are covered with the sealing material 107. Thereby, even if the 1st coupling | bond part 100-3rd coupling part 104 is arrange | positioned outside the drive circuit case 54, generation | occurrence | production of corrosion in the 1st coupling | bond part 100-3rd coupling part 104 is suppressed by the sealing material 107. . In addition, since the joining terminal cover 202 receives the sealing material 107, variation in the covering state of the sealing material 107 on the first coupling portion 100, the second coupling portion 102, and the third coupling portion 104 can be suppressed. Therefore, also in the second embodiment, the same operations and effects as the first embodiment are exhibited.

  Further, in the second embodiment, the first cover 106 and the second cover 108 in the first embodiment are omitted, and the joining terminal cover 202 covers the first coupling portion 100 to the third coupling portion 104. Therefore, an increase in the number of parts can be suppressed.

(Third embodiment)

  Hereinafter, the rotating electrical machine 300 according to the third embodiment will be described with reference to FIG. The rotating electrical machine 300 of the third embodiment is configured in the same manner as the rotating electrical machine 10 of the first embodiment, except for the shape of the first cover 106 and the second cover 108 and the arrangement position of the sealing material 107. Yes. And since the changed part from 1st Embodiment shown below is the same in the 1st cover 106 and the 2nd cover 108, it demonstrates using the 1st cover 106. FIG.

  That is, in the third embodiment, the first opening 106A of the first cover 106 is closed. In other words, the first cover 106 is formed in a bottomed rectangular tube shape having a first opening 106B opened to the holding member 42 side. Then, in a state where the first coupling part 100 is disposed in the first cover 106, the space between the outer edge of the first opening 106 </ b> B in the first cover 106 and the holding member 42 is hermetically sealed by the sealing material 107. Has been. For this reason, the airtightness in the 1st cover 106 is ensured. Thereby, generation | occurrence | production of the corrosion in the 1st coupling | bond part 100 can be suppressed. Therefore, also in the third embodiment, the same functions and effects as those of the first embodiment are exhibited except that the first coupling portion 100 to the third coupling portion 104 are covered with the sealing material 107. Can do.

  In the third embodiment, if the sealing performance between the outer edge of the first opening 106B (second opening 108B) in the first cover 106 (second cover 108) and the holding member 42 is ensured. Therefore, the amount of the sealant 107 used can be reduced.

  Furthermore, since it is not necessary to cover the first coupling part 100 to the third coupling part 104 with the sealing material 107, for example, the first coupling part 100 to the third coupling part 104 are repeatedly applied due to thermal expansion and contraction of the sealing material 107. It is possible to prevent the stress from acting.

(Fourth embodiment)

  Hereinafter, the rotating electrical machine 400 according to the fourth embodiment will be described with reference to FIG. 8. The rotating electrical machine 400 of the fourth embodiment is configured in the same manner as the rotating electrical machine 300 of the third embodiment except for the following points.

  That is, in the fourth embodiment, the rectangular partition wall 402 is integrally formed with the holding member 42. The partition wall 402 is disposed outside the first cover 106 and protrudes from the holding member 42 to one side in the axial direction of the motor body 12. The partition wall 402 is formed with a slit through which the first circuit terminal 60A and the first bus bar 80 are inserted. A sealing material 107 is filled in the space between the partition wall 402 and the first cover 106. Thereby, also in 4th Embodiment, there can exist an effect | action and effect similar to 3rd Embodiment. In the above description, the first cover 106 has been described, but the second cover 108 is configured similarly. In other words, the holding member 42 is formed with a partition wall outside the second cover 108, and the sealing material 107 is filled between the partition wall and the second cover 108.

  Further, in the fourth embodiment, since the flow of the sealing material 107 is blocked by the partition wall 402, it is possible to prevent the sealing material 107 from flowing into an unintended range on the holding member 42.

(Fifth embodiment)

  Hereinafter, the rotating electrical machine 500 according to the fifth embodiment will be described with reference to FIG. 9. The rotating electrical machine 500 of the fifth embodiment is configured in the same manner as the rotating electrical machine 400 of the fourth embodiment except for the following points.

  That is, in the fifth embodiment, the partition wall 402 is omitted from the holding member 42, and the partition wall 402 is formed integrally with the first cover 106. The first cover 106 is formed with four ribs 502 that connect the partition wall 402 and the first cover 106, and the rib 502 includes each corner portion of the first cover 106 and each corner portion of the partition wall 402. Are connected. Thus, four spaces are formed between the partition wall 402 and the first cover 106, and the space is filled with the sealing material 107. Thereby, also in 5th Embodiment, there can exist an effect | action and effect similar to 4th Embodiment. In the above description, the first cover 106 has been described, but the second cover 108 is configured similarly.

(Sixth embodiment)

  Hereinafter, the rotating electrical machine 600 according to the sixth embodiment will be described with reference to FIG. 10. The rotating electrical machine 600 of the sixth embodiment is configured in the same manner as the rotating electrical machine 400 of the fourth embodiment except for the following points.

  That is, in the sixth embodiment, a circular communication hole 604 is formed through the upper wall 602 of the first cover 106, and the communication hole 604 is a shaft of the motor body 12 with respect to the first coupling portion 100. It is arranged on one side of the direction. Thereby, in 6th Embodiment, since the inside of the 1st cover 106 can be confirmed, the coupling | bonding state of the 1st coupling | bond part 100 can be confirmed from the communicating hole 604, for example.

  Further, for example, whether compressed air or the like is injected into the first cover 106 from the communication hole 604, so that the space between the first opening 106 </ b> B of the first cover 106 and the holding member 42 is sealed in a liquid-tight state. Can be inspected.

  In the description of the sixth embodiment, the first cover 106 has been described, but the second cover 108 is similarly configured. That is, a pair of communication holes are formed through the upper wall of the second cover 108, and the communication holes are arranged on one side in the axial direction of the motor body 12 with respect to the second coupling portion 102 and the third coupling portion 104. Has been.

  Furthermore, in the first to sixth embodiments, the circuit terminals (the first circuit terminals 60A and 60B and the second circuit terminal 70) are integrally formed in the drive circuit case 54 by insert molding. Alternatively, for example, the circuit terminal may be integrated with the drive circuit case 54 by assembling the circuit terminal with the drive circuit case 54.

  Moreover, in 1st Embodiment and 3rd Embodiment-6th Embodiment, winding terminal part 40A-40F is via a connection member (the 1st bus bar 80 and the 2nd bus bar 90). , And circuit terminals (first circuit terminals 60A and 60B and second circuit terminal 70). Alternatively, the connecting member may be omitted and the winding terminal portions 40A to 40F may be directly coupled to the circuit terminal. In this case, the first bus bar 80 and the first circuit terminals 60A and 60B are integrally formed, and the second bus bar 90 and the second circuit terminal 70 are integrally formed to form the winding terminal portions 40A to 40F. The first cover 106 may be provided at a position corresponding to each.

  Furthermore, in the first embodiment, the first cover 106 and the second cover 108 and the holding member 42 are configured separately, but the first cover 106 and the second cover 108 are integrated with the holding member 42. It may be formed. Thereby, the cost increase in the rotary electric machine 10 can be suppressed.

  In the second embodiment, the joining terminal cover 202 and the drive circuit case 54 are configured separately, but the joining terminal cover 202 may be formed integrally with the drive circuit case 54. This eliminates the need for a dedicated member covering the first coupling portion 100 to the third coupling portion 104.

  Further, in the first to sixth embodiments, the two windings 38 are coupled by TIG welding in the first bus bar coupling portion 84 and the second bus bar coupling portion 94. Corresponding to the ten specifications, the number of windings 38 coupled to the first bus bar coupling portion 84 and the second bus bar coupling portion 94 may be arbitrarily set. Further, the number of first bus bar coupling portions 84 and second bus bar coupling portions 94 may be set arbitrarily.

DESCRIPTION OF SYMBOLS 10 ... Rotary electric machine, 12 ... Motor main body (motor part), 34 ... Armature core, 36 ... Teeth part, 38 ... Winding, 40A, 40B, 40C, 40D, 40E, 40F: Winding terminal portion, 42: Holding member, 54 ... Drive circuit case, 56 ... Circuit chamber, 58 ... Circuit board (drive circuit portion), 60A ... First circuit Terminal (circuit terminal), 60B ... 1st circuit terminal (circuit terminal), 62A ... terminal part, 70 ... 2nd circuit terminal (circuit terminal), 72A ... terminal part, 80 ... 1st bus bar (connection member), 90 ... 2nd bus bar (connection member), 100 ... 1st connection part (connection part), 102 ... 2nd connection part (connection part), 104 ... 3rd coupling | bond part (joint part), 106 ... 1st cover (cover), 106A, 1 6B ... 1st opening part (opening part), 107 ... Sealing material, 108 ... 2nd cover (cover), 108A, 108B ... 2nd opening part (opening part), 200 ... Rotating electric machine, 202 ... Joining terminal cover (cover), 402 ... Partition, 604 ... Communication hole

Claims (10)

A drive circuit case that covers the drive circuit unit that drives the motor unit and is a sealed circuit chamber.
It is made of a conductive metal different from aluminum, and one end portion is coupled to the drive circuit portion in the circuit chamber, and the other end portion is exposed outside the drive circuit case while extending from the drive circuit case. Circuit terminals,
The circuit terminal is wound around the tooth portion of the armature core in the motor portion and is made of a metal mainly composed of aluminum, and the terminal portion is directly or via a connecting member made of a metal mainly composed of aluminum. A winding coupled to the other end of the
A cover that covers a terminal portion of the winding in the circuit terminal or a coupling portion with the connecting member;
A sealing material for liquid-tightly sealing the opening of the cover;
Rotating electric machine with   The rotating electrical machine according to claim 1, wherein the sealing material is filled in the cover and covers the coupling portion.   The rotating electrical machine according to claim 2, wherein the cover is formed in a cylindrical shape having an opening, and the sealing material is exposed through the opening. A holding member for holding a terminal portion of the winding;
The rotating electrical machine according to claim 1, wherein the cover is formed integrally with the holding member.   The rotating electrical machine according to any one of claims 1 to 4, wherein a terminal portion of the winding is coupled to the circuit terminal via the connecting member. A terminal portion branched into a plurality of portions is formed at one end of the circuit terminal, and the terminal portion is coupled to the drive circuit portion.
The rotating electrical machine according to claim 5, wherein the other end portion of the circuit terminal is coupled to the connecting member. A holding member for holding a terminal portion of the winding;
The cover has a bottomed cylindrical shape opened to the holding member side,
2. The rotating electrical machine according to claim 1, wherein the sealing material liquid-tightly seals between an outer edge of the opening of the cover and the holding member. The sealing material is configured as a resin material having fluidity,
The rotating electrical machine according to claim 7, wherein the holding member is formed with a cylindrical partition wall outside an outer edge of the opening of the cover. The sealing material is configured as a resin material having fluidity,
The rotating electrical machine according to claim 7, wherein the cover is formed with a cylindrical partition wall outside an outer edge of the opening of the cover.   The rotating electrical machine according to any one of claims 7 to 9, wherein a communication hole that communicates between the inside of the cover and the outside of the cover is formed in the cover.

Images