JP2018088818A - Electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure airtightness, when a cover is attached to a base member, in a sealed structure of the cover having the base member, the cover covering a part of the base member, and an annular seal member provided between the base member and the cover.SOLUTION: A sealed structure of a cover has a base member 5, a terminal cover 10 covering a terminal connecting portion 53 of the base member 5, and an annular seal member 40 provided between the base member 5 and the terminal cover 10. The terminal cover 10 has a top plate portion 11 covering the terminal connecting portion 53 and an annular cover wall portion 12 standing from the top plate portion 11 to the base member 5 and surrounding the terminal connecting portion 53. The base member 5 has an annular base wall portion 53a contacting an inner peripheral side or an outer peripheral side of the cover wall portion 12 through the seal member 40. In the seal member 40, a parting line is formed by avoiding a position contacting the cover wall portion 12 and the base wall portion 53a.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an electric motor.

Conventionally, a controller that controls driving of a driven body such as a motor is disclosed in Patent Document 1, for example. This includes a base member on which a terminal of the controller is disposed and a cover that covers the terminal exposed to a part of the base member. Such a base member and the cover are fixed with an adhesive or the like, for example.
In addition, a method for securing airtightness by attaching a cover to a base member via an annular sealing material such as an O-ring is known. When airtightness is ensured by such a sealing material, the sealing material is compressed in the cover mounting direction and sealed in the compression direction.

JP 2014-108030 A

  However, when the cover is attached to the base member via the seal member, the seal member is formed when the seal member is crushed (compressed in a direction orthogonal to the cover attachment direction) at the respective wall portions of the cover and the base member. The remaining parting line may come into contact with each wall portion, and there is a problem in ensuring airtightness when the cover is attached to the base member.

  Accordingly, the present invention provides a controller including a base member, a cover that covers a part of the base member, and an annular sealing material provided between the base member and the cover, and airtightness when the cover is attached to the base member. It aims at securing.

  As a means for solving the above problems, the invention described in claim 1 is an electric motor comprising a motor for rotationally driving an axial fan and a controller for controlling the motor, wherein the controller includes the motor. A base member on which a power supply terminal is disposed, and a casing attached to the base member, the casing including a wind receiving surface that receives wind generated by rotation of the axial fan, The receiving surface is provided with a plurality of first heat radiating members extending in the motor axial direction along the axis of the output shaft of the motor, and a second heat radiating member for connecting the plurality of first heat radiating members to each other. It is characterized by being.

  The invention described in claim 2 is characterized in that a third heat radiating member protruding in a direction orthogonal to the motor shaft direction is provided on the wind receiving surface.

  The invention described in claim 3 is characterized in that the third heat radiating member extends in the motor shaft direction.

  According to a fourth aspect of the present invention, in the base member, a power feeding connector for the motor protrudes in a direction perpendicular to the motor axial direction at a position where the wind generated by the rotation of the axial fan is received. A receiving port of the external connector in the connector is open to the outside in a direction orthogonal to the motor shaft direction.

  The invention described in claim 5 is characterized in that the casing is made of aluminum.

  According to a sixth aspect of the present invention, the casing is provided with a flange portion that extends in a direction orthogonal to the motor axial direction, and a through hole that opens in the motor axial direction is formed in the flange portion. It is characterized by being.

  According to a seventh aspect of the present invention, the first heat radiating member is formed in a pin shape, and the second heat radiating member is formed in a linear rib shape that connects ends of the plurality of first heat radiating members. It is formed.

  According to the present invention, the heat dissipation effect can be further increased.

It is the figure which looked at the electric motor provided with the controller which concerns on embodiment of this invention from the one side of the motor axial direction. It is the figure which looked at the said electric motor from the other side of the motor axial direction. It is III-III sectional drawing of FIG. It is the figure which looked at the bus-bar module in the said controller from the 1st surface side of the base member. It is a disassembled perspective view for demonstrating the connection structure of the said bus-bar module and a housing | casing. It is a perspective view which shows the terminal cover in the said controller with a sealing material. It is the figure which looked at the said terminal cover from the other side of the motor axial direction. It is the perspective view which looked at FIG. 7 from arrow VIII. It is sectional drawing which cut | disconnected the sealing material provided between the said base member and the said terminal cover by the surface orthogonal to the circumferential direction of a sealing material. It is sectional drawing equivalent to FIG. 9 which shows the modification of the said sealing material. It is a principal part enlarged view of FIG. It is a principal part enlarged view of FIG. It is a perspective view for demonstrating the effect | action of the cooling wind when the said controller is forced air-cooled. It is a perspective view for demonstrating the effect | action of the cooling air following FIG. It is a schematic diagram for demonstrating the effect | action of the latching | locking part which concerns on a comparative example. It is a schematic diagram for demonstrating the effect | action of the latching | locking part which concerns on embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
<Whole electric motor>
1 to 3 show an example of an electric motor 1 including a controller 3 according to the embodiment.
The electric motor 1 includes a brushless motor 2 (driven body) and a controller 3 that controls the brushless motor 2.
In the figure, reference sign CL indicates the axis of the output shaft 20 of the brushless motor 2. Hereinafter, a direction along the axis CL is referred to as a “motor axial direction”, a direction orthogonal to the axis CL is referred to as a “motor radial direction”, and a direction around the axis CL is referred to as a “motor circumferential direction”.
In the figure, reference numeral V1 indicates one side in the motor axis direction, and reference numeral V2 indicates the other side in the motor axis direction.

<Brushless motor>
2 and 3, the brushless motor 2 can generate an output shaft 20 that forms an axis CL, a rotor 21 that can rotate with the output shaft 20, and a magnetic field for rotating the rotor 21 together with the output shaft 20. The stator 22 is provided.

  The rotor 21 includes a disc-shaped bottom wall 21a, a cylindrical peripheral wall 21b extending from the outer peripheral end of the bottom wall 21a to one side V1 in the motor axial direction and forming an opening 21i on the one side V1 in the motor axial direction, A flange 21d extending in the radial direction is provided at the end of the peripheral wall 21b on the opening 21i side. A cylindrical boss portion 21h that passes through the output shaft 20 is formed in the center portion in the radial direction of the bottom wall 21a. For example, the rotor 21 can be rotated together with the output shaft 20 by press-fitting and fixing the output shaft 20 to the boss portion 21h. A plurality of rotor magnets 21c are provided on the radially inner side surface of the peripheral wall 21b with an adhesive or the like. The rotor 21 receives the magnetic field generated by the stator 22 and can rotate with the output shaft 20.

  The stator 22 is disposed on the radially inner side of the peripheral wall 21 b of the rotor 21. The stator 22 is fixed to the casing 8 of the controller 3 with bolts 22d. A bearing holder 24 for fitting a pair of bearings 23 functioning as bearings for the output shaft 20 is provided inside the stator 22 in the radial direction, and is fixed together with the stator 22 by bolts 22d.

  The stator 22 has a cylindrical stator core 22a, an insulating insulator 22b mounted on both sides in the motor axial direction with respect to a plurality of teeth projecting radially outward from the stator core 22a, and the insulator 22b. And a conductive coil 22c to be wound. The coil 22c corresponds to three phases of U phase, V phase, and W phase. The brushless motor 2 of this embodiment is a three-phase brushless motor provided with a three-phase coil 22c of U phase, V phase, and W phase.

  The terminal portion of the coil 22c is pulled out from the opening 21i side of the rotor 21, and is connected to the bus bar unit 25 that is disposed on the opening 21i side so as to penetrate the opening 80m of the housing 8. The bus bar unit 25 has a function of supplying electric power from the outside to the coil 22c. For example, the bus bar unit 25 includes a U-phase bus bar, a V-phase bus bar, and a W-phase bus bar connected to a winding start end (not shown) of each phase coil 22c, and a winding end end ( And a neutral point bus bar (not shown). Of each bus bar, the U to W phase bus bar includes three power supply terminals 25 a extending from the opening 21 i toward the controller 3 along the motor axial direction. Each power supply terminal 25a is electrically connected to a motor side end 125 (see FIG. 4) of a three-phase bus bar disposed on the base member 5 by resistance welding or the like.

<Controller>
Referring to FIG. 4, the controller 3 is electrically connected to a terminal 4 including a plurality of bus bars 100 (conductive plate materials), a resin base member 5 on which the terminals 4 are disposed, and a plurality of bus bars 100. A plurality of electronic elements 62 to 66 (see FIG. 5), a power device 7 for supplying power to the brushless motor 2 and controlling the drive of the brushless motor 2, and a housing 8 (see FIG. 3) attached to the base member 5. ) And covers 9, 10 (the main body cover 9 and the terminal cover 10) covering the base member 5. On the base member 5, a control circuit for controlling the brushless motor 2 is configured.
In FIG. 4, the housing 8 and the covers 9, 10 are not shown for convenience. Reference numeral 30 in the figure denotes an insert-molded part (hereinafter referred to as a “bus bar module”) in which a plurality of bus bars 100 are disposed in a portion of the controller 3 excluding the casing 8 and the covers 9, 10, that is, in the base member 5. ).

<Base member>
The base member 5 includes a base body 50 having a thickness in the motor axial direction and a rectangular plate shape in a plan view as viewed from the motor axial direction. The base body 50 has a first side 50a, a second side 50b opposite to the first side 50a, a third side 50c orthogonal to the first side 50a and the second side 50b, and a first side 50a in plan view. A fourth side 50d that is inclined adjacent to the second side, and a fifth side 50e that is opposed to the fourth side 50d and is inclined adjacent to the second side 50b.

  Hereinafter, one side in the thickness direction of the base member 5 is referred to as a “first surface side”, and a side opposite to the first surface side of the base member 5 is referred to as a “second surface side”. The “first surface side” corresponds to one side of the base member 5 in the motor axial direction, and the “second surface side” corresponds to the other side of the base member 5 in the motor axial direction.

  The base member 5 includes a first connector 51 and a second connector 52 protruding from the third side 50c of the base body 50 and a terminal connection portion 53 protruding from the opposite side of the third side 50c of the base body 50 in plan view. And further comprising. For example, the base member 5 has a plurality of bus bars 100 disposed therein by insert molding using an insulating material such as resin.

A flange having a contour extending between the base body 50 and the terminal connection portion 53 so as to extend along each of the fourth side 50d and the fifth side 50e in plan view and along the outer peripheral portion of the terminal connection portion 53. Part 50f is formed.
In the base body 50, a flange portion 50g having a triangular shape with a rounded corner at the top in plan view is formed at a corner portion where the first side 50a and the second side 50b intersect the third side 50c.
A through hole 50h that opens in the thickness direction of the base member 5 is formed in the flange portions 50f and 50g.
An opening 53 h that opens in the thickness direction of the base member 5 is formed in the terminal connection portion 53 at a position facing the output shaft 20.

<Case>
Referring also to FIG. 5, the casing 8 includes a casing main body 80 having a shape along the outer shape of the base main body 50 in the motor axial direction, and a motor connecting portion 81 having a shape along the outer shape of the terminal connection portion 53. And a motor bracket portion 82 having a shape along the outer shape of the brushless motor 2. For example, the housing 8 is made of a metal material having good thermal conductivity such as aluminum.

<Case body>
1 to 3 together, the housing main body 80 protrudes outward in the width direction from a main body base portion 80a having a flat surface on the other side in the motor axial direction, and both end portions in the width direction of the main body base portion 80a. A plurality of flange portions 80b (for example, two in total in this embodiment, one at each end in the width direction) and a plurality of pin-type heatsinks projecting toward the other side in the motor axial direction on the surface of the main body base portion 80a A connecting rib 80d that extends linearly so as to connect between the fin 80c and a plurality of adjacent upper and lower heat dissipating fins 80c in FIG. 2, and a plurality of protrusions that protrude outward in the width direction from both ends in the width direction of the main body base portion 80a. And a heat radiating fin 80e of the mold. A through-hole 80h that opens in the motor axial direction is formed in the flange portion 80b.

<Motor connection part>
The motor connecting portion 81 is formed with an opening 81h that opens in the motor axial direction. A motor connection boss portion 81a to which the brushless motor 2 is integrally connected is provided at a portion facing the opening 81h in the motor connection portion 81.

<Motor bracket part>
The motor bracket portion 82 includes a base portion 82a having a flat surface on one side in the motor axial direction, and a plurality of (for example, three in the present embodiment) flanges protruding outward in the motor radial direction from the outer peripheral portion of the base portion 82a. A portion 82b and a plurality of pin-type heat dissipating fins 82c projecting toward one side in the motor axial direction are provided on the surface of the base portion 82a. The flange portion 82b is formed with a through hole 82h that opens in the motor axial direction.

<Cooling structure>
Referring to FIGS. 13 and 14 together, wind is sent to the member to be cooled R by a fan member (not shown) attached to the output shaft 20 of the brushless motor 2. Reference sign W in the figure indicates the flow of the main wind sent to the member R to be cooled.
The fan member sends the wind toward one direction of the motor axial direction. Part of the wind W1 from the fan member hits one surface of the main body base portion 80a, the plurality of pin-type heat radiation fins 80c, the connecting ribs 80d, and the plurality of convex heat-radiation fins 80e. Further, most of the wind W from the fan member goes to the side of the main body base portion 80a and then reaches the member R to be cooled to cool the member R to be cooled. On the other hand, a part of the wind W2 from the fan member changes its course toward the base portion 82a by the wind guide plate 95 attached between the shroud (not shown) and the controller 3. The wind W3 whose path has been changed is applied to one surface of the base portion 82a and a plurality of pin-type heat radiation fins 82c, thereby convection of the air in the heat radiation fins 82c and further increasing the heat radiation effect by the heat radiation fins 82c. be able to.

In addition, a plurality of pin-type heat radiation fins 80 project from the surface of the main body base portion 80a toward the other side in the motor axial direction, so that wind from the fan member sent toward one side in the motor axial direction can be generated. Rectification can be efficiently performed on the surface of the main body base portion 80a.
Further, the connecting rib 80d extends linearly so as to connect the plurality of heat radiation fins 80c, so that the heat radiation area of the main body base portion 80a can be increased as compared with the case where only the pin-type heat radiation fins are provided. it can. Further, as compared with the case where only the pin-type heat radiating fins are provided, the main body base portion 80a can be easily removed from the mold, so that productivity can be improved. Furthermore, the size of the pin-type heat radiation fin 80 can be reduced.
In addition, the plurality of convex radiating fins 80e protrude outward in the width direction from both ends in the width direction of the main body base portion 80a, so that only the pin-type heat radiating fins are provided. The heat radiation area can be increased.
Further, since the water droplets adhering to the housing body 80 are guided vertically downward along the connecting rib 80d, the waterproof property of the brushless motor 2 can be enhanced.

<Base member mounting part>
Referring also to FIG. 5, a base member mounting portion 80 f is formed between the housing body 80 and the motor connecting portion 81 at a portion facing the flange portion 50 f of the base member 5 in the motor axial direction.
A base member mounting portion 80g is formed in the housing body 80 at a portion facing the flange portion 50g of the base member 5 in the motor axial direction.
The base member mounting portions 80f and 80g are formed with mounting holes 80k that open in the motor axial direction.

  For example, the bolt 18 is inserted into the through holes 50h of the flange portions 50f and 50g of the base member 5, and the bolts 18 are screwed into the mounting holes 80k of the base member mounting portions 80f and 80g of the housing 8, thereby Can be fastened and fixed to the housing 8.

<Main body cover>
1 and 5 together, the main body cover 9 has a rectangular shape along the outer shape of the base main body 50 when viewed from the motor shaft direction. The body cover 9 approaches the base body 50 from one side in the plate thickness direction and covers the base body 50. “One side in the plate thickness direction” corresponds to one side in the motor shaft direction.

  The main body cover 9 has a top plate portion 90 that covers the base main body 50 from one side in the plate thickness direction, and a rectangular annular shape that stands up from the top plate portion 90 toward the base main body 50 and surrounds the base main body 50 when viewed from the motor axial direction. The cover wall part 91 is provided.

The top plate portion 90 is provided with a locking portion 92 that locks the main body cover 9 to the base main body 50.
A plurality of the locking portions 92 are provided at both end portions in the width direction of the top plate portion 90 (for example, two in total in this embodiment, two at both ends in the width direction).
The locking portion 92 includes a pair of leg portions 92a extending from the top plate portion 90 toward the base body 50, and a connecting portion 92b that connects the end portions of the pair of leg portions 92a.
The base body 50 is provided with a claw portion 50j that is engaged with the connecting portion 92b of the engaging portion 92 from one side in the thickness direction. A plurality of claw portions 50j are provided at both end portions in the width direction of the base main body 50 so as to face the locking portions 92 of the main body cover 9 (for example, two in total in the present embodiment, two at each end in the width direction).

<Terminal cover>
1 and 3 together, the terminal cover 10 has a shape that follows the outer shape of the terminal connection portion 53 when viewed from the motor shaft direction. The terminal cover 10 approaches the terminal connection portion 53 from one side in the plate thickness direction and covers the terminal connection portion 53. The terminal cover 10 is disposed at a position covering the motor-side end 125 of the three-phase bus bar disposed on the base member 5 and the fastening portion 20j of the output shaft 20, and corresponds to the three power supply terminals 25a of the brushless motor 2. The electric connection part with the motor side edge part 125 to cover is covered. An annular sealing material 40 is provided between the terminal connection portion 53 and the terminal cover 10.
Here, the terminal cover corresponds to a “cover” recited in the claims. The terminal connection portion corresponds to “a part of the base member” recited in the claims. The motor-side end 125 of the three-phase bus bar disposed on the base member 5 corresponds to “a part of the terminal” recited in the claims. The fastening portion 20j of the output shaft 20 corresponds to a “motor fastening portion” recited in the claims.

6 and 11 together, the terminal cover 10 stands up from the top plate portion 11 covering the terminal connection portion 53 from one side in the thickness direction, and from the top plate portion 11 toward the terminal connection portion 53. And an annular cover wall portion 12 surrounding the terminal connection portion 53 when viewed from the thickness direction.
The terminal connection portion 53 includes an annular base wall portion 53 a that is in contact with the outer peripheral side of the cover wall portion 12 via the sealing material 40. The terminal connection portion 53 may include an annular base wall portion that is in contact with the inner peripheral side of the cover wall portion 12 via the sealing material 40.

<Cover wall>
The cover wall portion 12 stands up from the top plate portion 11 toward the terminal connection portion 53 and is formed on the outer side of the first wall portion 12a and the annular first wall portion 12a surrounding the terminal connection portion 53 when viewed from the plate thickness direction. An annular seal wall portion 12b that protrudes toward the plate thickness direction and covers one side of the seal material 40 in the plate thickness direction as viewed from the plate thickness direction, and an end portion of the first wall portion 12a (the radially inner end of the seal wall portion 12b) ) To the terminal connection portion 53 and an annular second wall portion 12c that is in contact with the inner peripheral side of the base wall portion 53a through the sealing member 40 when viewed from the thickness direction.

  Referring also to FIG. 12, a cover-side seal surface 12 s that is in contact with the inner peripheral side of the sealing material 40 is formed on the second wall portion 12 c, and a base-side seal that is in contact with the outer peripheral side of the sealing material 40 is formed on the base wall portion 53 a. A surface 53s is formed. The cover-side seal surface 12s and the base-side seal surface 53s each have an annular shape when viewed from the plate thickness direction, and extend linearly in parallel with the plate thickness direction in a cross-sectional view of FIG.

  A flat end in contact with the flat bottom surface 53f of the groove of the terminal connection portion 53 is provided at the end of the second wall portion 12c (the end portion on the terminal connection portion 53 side) while the terminal cover 10 is locked to the terminal connection portion 53. An abutment surface 12f is formed.

<Seal material>
Referring also to FIG. 9, the seal material 40 includes a seal body 40 a that is circular in cross-sectional view, and a plurality of (for example, three in this embodiment) parting lines 40 b that protrude radially outward of the seal body 40 a. Is provided. The sealing material 40 is formed of an elastically deformable member. Each parting line 40b is formed in the outer peripheral surface of the seal body 40a at a portion that avoids a position in contact with the cover wall portion 12 and the base wall portion 53a. For example, the formation position of the parting line 40b is set using a mold having a slide structure.

The sealing material 40 contains oil for preventing friction.
Thereby, when the seal member 40 is assembled between the cover wall portion 12 and the base wall portion 53a, the seal material 40 can be prevented from being twisted.

Note that the number of party lines is not limited to three.
For example, like the sealing material 41 shown in FIG. 10, you may provide the two parting lines 41b which protrude in the radial direction outer side of the seal | sticker main body 41a which makes a circle by sectional view. The parting line 41b is arrange | positioned in the position which opposes on both sides of the seal | sticker main body 41a.
Further, the arrangement position of the parting line is not limited to this, and may be formed so as to avoid the position in contact with the cover wall portion 12 and the base wall portion 53a.
Further, the cross-sectional shape of the seal body is not limited to a circle. For example, the cross-sectional shape of the seal body may be an ellipse or a polygon such as a triangle or a quadrangle.

Referring also to FIG. 12, the terminal cover 10 is attached to the terminal connecting portion 53 in a state where the sealing material 40 is compressed in the radial direction of the cover wall portion 12 and the base wall portion 53a.
The radial direction of the cover wall portion 12 and the base wall portion 53a corresponds to a direction orthogonal to the plate thickness direction (a direction in which the cover wall portion 12 and the base wall portion 53a face each other).

<Tapered part>
The cover wall portion 12 and the base wall portion 53a have tapered portions 12t and 53t (covers which are inclined so as to avoid biting of the seal material 40 when the terminal cover 10 is attached to the terminal connection portion 53 via the seal material 40. A side taper portion 12t and a base side wall portion 53t) are formed.

The cover side taper portion 12t has an annular shape when viewed from the plate thickness direction, and is located on the outer side in the radial direction of the seal wall portion 12b and facing the seal material 40 with respect to the cover side seal surface 12s in the cross-sectional view of FIG. It is formed to be inclined.
The base-side taper portion 53t has an annular shape when viewed from the plate thickness direction, and is a base-side seal surface in a cross-sectional view of FIG. 12 at a portion on one side of the base wall portion 53a in the plate thickness direction and facing the cover-side taper portion 12t. It is formed to be inclined with respect to 53s.

<Terminal cover lift prevention part>
The terminal cover 10 and the terminal connection portion 53 are provided with a terminal cover lift prevention portion 150 that prevents the terminal cover 10 from floating from the terminal connection portion 53. The terminal cover lifting prevention unit 150 includes a first locking portion 151 provided outside the terminal cover 10 as a locking portion for locking the terminal cover 10 to the terminal connection portion 53, an inner side of the terminal cover 10, and an output shaft. And a second locking portion 152 provided on the side facing the 20 fastening portions 20j.
Note that the terminal cover lifting prevention portion 150 is not limited to the locking portions 151 and 152, and a fastening member such as a bolt may be provided, or a fixing means such as an adhesive may be used.
Here, the terminal cover lifting prevention portion corresponds to a “lifting prevention portion” recited in the claims. The first locking portion and the second locking portion correspond to a “locking portion” described in the claims.

The first locking portion 151 includes a first cover side locking portion 13 provided on the terminal cover 10 and a first claw portion 53j as a first base side locking portion provided on the terminal connection portion 53 side.
The 1st cover side latching | locking part 13 is a 1st connection which connects a pair of 1st leg part 13a extended toward the terminal connection part 53 from the outer side of the top-plate part 11, and a terminal part of a pair of 1st leg part 13a. Part 13b. The 1st nail | claw part 53j latches to the 1st connection part 13b of the 1st cover side latching | locking part 13 from the one side of a plate | board thickness direction.
The second locking part 152 includes a second cover side locking part 14 provided on the terminal cover 10 and a second claw part 53k as a second base side locking part provided on the terminal connection part 53 side.
The second cover side locking portion 14 includes a pair of second leg portions 14a extending from the side facing the fastening portion 20j of the output shaft 20 inside the top plate portion 11 toward the terminal connection portion 53, and a pair of second legs 14a. And a second connecting portion 14b for connecting the end portions of the leg portions 14a. The 2nd nail | claw part 53k latches to the 2nd connection part 14b of the 2nd cover side latching | locking part 14 from the one side of a plate | board thickness direction.
Here, the first cover side locking portion and the second cover side locking portion correspond to a “cover side locking portion” recited in the claims. The first base side locking portion and the second base side locking portion correspond to the “base side locking portion” described in the claims. The first leg portion and the second leg portion correspond to a “leg portion” recited in the claims. The first connecting portion and the second connecting portion correspond to a “connecting portion” recited in the claims.
The first claw portion and the second claw portion correspond to a “claw portion” recited in the claims.

A portion sandwiched between the base end portion (the portion close to the top plate portion 11) of the pair of first leg portions 13a and the first wall portion 12a and the seal wall portion 12b of the cover wall portion 12 extends in the plate thickness direction. A pair of ribs 13d is formed.
On the base end side of the pair of first leg portions 13a, a curved portion 13e that is curved in an arc shape in a sectional view of FIG. 11 is formed.
Referring also to FIG. 8, the base end portions 14d (portions near the top plate portion 11) of the pair of second leg portions 14a have a larger thickness than the main body portions of the pair of second leg portions 14a. Connected to the plate part 11.

The first connecting portion 13b is formed with a flat contact portion 13f that contacts the flat engaging surface of the first claw portion 53j. The first connecting portion 13b is formed with a tapered portion 13g that is inclined with respect to the thickness direction in the cross-sectional view of FIG. A tapered portion 53q that is inclined with respect to the plate thickness direction in the cross-sectional view of FIG.
The second connecting portion 14b is formed with a flat contact portion 14f that contacts the flat engaging surface of the second claw portion 53k. The second connecting portion 14b is formed with a tapered portion 14g that is inclined with respect to the thickness direction in the cross-sectional view of FIG. A tapered portion 53r that is inclined with respect to the plate thickness direction in the cross-sectional view of FIG. 11 is formed at a portion of the second claw portion 53k that faces the second cover side locking portion 14.

<Thick part>
The 1st connection part 13b has the thick part 13c larger than a pair of 1st leg part 13a in the site | part pinched by a pair of 1st leg part 13a. The thick portion 13c is formed outside the first connecting portion 13b and is not formed inside the first connecting portion 13b (on the side of the terminal connecting portion 53 where the first claw portion 53i is formed).
In addition, the thick part 13c may be formed in the site | part straddling a pair of 1st leg part 13a. That is, the thick part 13c should just be formed in the site | part pinched by at least a pair of 1st leg part 13a.

The 2nd connection part 14b has the thick part 14c larger than a pair of 2nd leg part 14a in the site | part straddling a pair of 2nd leg part 14a. The thick portion 14c is formed outside the second connecting portion 14b, and is not formed inside the second connecting portion 14b (on the side where the second claw portion 53k is formed in the terminal connecting portion 53).
In addition, the thick part 14c may be formed in the site | part pinched by a pair of 2nd leg part 14a. That is, the thick part 14c should just be formed in the site | part pinched by at least a pair of 2nd leg part 14a.

<Rib>
Referring also to FIG. 7, a plurality of (for example, four in this embodiment) ribs 15 extending in the plate thickness direction are formed on the radially inner side of the cover wall portion 12. The number of ribs 15 arranged is not limited to four.

  On the inner side in the thickness direction of the top plate portion 11, an arc-shaped wall portion 16 is formed as viewed from the thickness direction extending in the thickness direction so as to face the fastening portion 20j of the output shaft 20. On the inner side in the thickness direction of the top plate portion 11, a rib 17 extends radially inward of the wall portion 16 and extends so as to surround the second cover side locking portion 14 and reaches the radially inner end of the cover wall portion 12. It is formed.

  Referring also to FIG. 12, the rib 15 is disposed between the wall portion 53 b erected from the terminal connection portion 53 toward one side in the plate thickness direction and the second wall portion 12 c. Thereby, even if it is a case where the terminal cover 10 is made to approach the terminal connection part 53 from the board | substrate thickness direction and the inclined side, the attachment position of the terminal cover 10 with respect to the terminal connection part 53 can be controlled. Further, even if an error occurs in the distance between the cover wall portion 12 and the base wall portion 53a, the distance can be narrowed by the rib 15, so that the terminal cover 10 is attached to the terminal connection portion 53. Accuracy can be increased.

  As described above, the embodiment described above includes the base member 5, the terminal cover 10 that covers the terminal connection portion 53 of the base member 5, and the annular sealing material 40 that is provided between the base member 5 and the terminal cover 10. The terminal cover 10 has a top plate portion 11 that covers the terminal connection portion 53, and an annular shape that stands up from the top plate portion 11 toward the base member 5 and surrounds the terminal connection portion 53. The base member 5 includes an annular base wall portion 53a that is in contact with the inner peripheral side or the outer peripheral side of the cover wall portion 12 via the sealing material 40. The sealing material 40 includes a cover wall portion. 12 and the parting line 40b are formed avoiding the position in contact with the base wall 53a.

  According to this configuration, the parting line 40 b is formed in the sealing material 40 so as to avoid the position in contact with the cover wall portion 12 and the base wall portion 53 a, so that the terminal cover 10 is interposed between the base member 5 and the sealing material 40. Even when the sealing material 40 is crushed by the cover wall portion 12 and the base wall portion 53a, the airtightness when the terminal cover 10 is attached to the base member 5 can be ensured.

  Moreover, in the said embodiment, the terminal cover 10 is attached to the base member 5 in the state which compressed the sealing material 40 in the radial direction of the cover wall part 12 and the base wall part 53a, and the axis line (annular seal | sticker of the sealing material 40 is carried out. Since the sealing material 40 is crushed in a direction (a radial direction of the sealing material) perpendicular to the imaginary line passing through the opening center of the material 40, the terminal cover 10 can be prevented from being lifted from the base member 5. Further, by avoiding the terminal cover 10 from floating from the base member 5, it is not necessary to provide a large number of engaging portions on the terminal cover 10 and the base portion 5, so that the degree of freedom of the cover layout can be increased.

Moreover, in the said embodiment, when attaching the terminal cover 10 to the base member 5 via the sealing material 40 in each of the cover wall part 12 and the base wall part 53a, the sealing material between the terminal cover 10 and the base member 5 is used. Since the tapered portions 12t and 53t that are inclined so as to avoid the biting of 40 can be formed, the biting of the sealing material 40 can be prevented, so that the airtightness when the terminal cover 10 is attached to the base member 5 is achieved. Can be easily secured. Moreover, since the time for eliminating the biting of the sealing material 40 can be saved, the working time can be shortened.
In general, in the case of a structure that seals in the compression direction, it is necessary to secure a compression allowance for compressing the sealing material in each of the cover and the base member, so that the sealing material is difficult to see after assembly. However, in this embodiment, a gap can be formed in the inclined direction of the taper portions 12t and 53t in the cover wall portion 12 and the base wall portion 53a. Can be confirmed.

  Further, in the above embodiment, the terminal cover 10 and the base member 5 are provided with the lifting prevention portion 150 that prevents the terminal cover 10 from being lifted from the base member 5, so that the terminal cover 10 is firmly attached to the base member 5. Can be fixed. Therefore, when the terminal cover 10 is attached to the base member 5 via the sealing material 40, the terminal cover 10 can be prevented from floating from the base member 5.

  Moreover, in the said embodiment, the raising prevention part 150 is provided with the latching | locking parts 151 and 152 which latch the terminal cover 10 to the base member 5, and can use fastening members, such as a volt | bolt, or fixing means, such as an adhesive agent. Compared with the case where it uses, since the terminal cover 10 can be easily latched to the base member 5, an installation man-hour can be reduced.

Further, in the above embodiment, the locking portion 151 includes the cover side locking portion 13 provided in the terminal cover 10 and the claw portion 53j as the base side locking portion provided in the base member 5, and the cover side engagement. The stop portion 13 includes a pair of leg portions 13a extending from the top plate portion 11 toward the base member 5, and a connecting portion 13b that connects the end portions of the pair of leg portions 13a, and the claw portion 53j includes a connecting portion 13b. The terminal cover 10 can be easily locked to the base member 5 by hooking the connecting portion 13b to the claw portion 53j while utilizing the deflection of the leg portion 13a by locking from one side in the plate thickness direction. it can.
15 and 16, the terminal cover 10 receives the load F toward the side opposite to the one side in the plate thickness direction by hooking the connecting portion 13b to the claw portion 53j. However, compared with the configuration in which the protruding portion 13bX protruding from the end portion of the leg portion 13X is hooked on the claw portion 53jX, the offset load on the connecting portion 13b (an attempt to shift the connecting portion 13b in the direction orthogonal to the plate thickness direction). Since the load, that is, the load for removing the connecting portion 13b from the claw portion 53j can be kept small, the terminal cover 10 can be made difficult to come off. Further, the locking portion 151 can be prevented from being damaged by suppressing the offset load on the connecting portion 13b to be small. In addition, the code | symbol F1-F3 in FIG. 15 shows component force when the convex part 13bX which concerns on a comparative example receives the load F. FIG.

  Moreover, in the said embodiment, the thickness of the connection part 13b is made into a pair by having the thick part 13c larger than the thickness of a pair of leg part 13a in the site | part between which the connection part 13b is pinched | interposed at least by a pair of leg part 13a. Compared with the case where the thickness of the leg portion 13a is the same, the breakage of the locking portion 151 can be further prevented.

  Further, in the above embodiment, the housing 8 includes the motor connecting portion 81 to which the brushless motor 2 is integrally connected, so that the controller 3 and the brushless motor 2 are integrated to form the base of the terminal cover 10. Airtightness when attached to the member 5 can be ensured.

  Moreover, in the said embodiment, the terminal cover 10 is arrange | positioned in the position which covers the motor side edge part 125 of the three-phase bus bar arrange | positioned at the base member 5, and the fastening part 20j of the output shaft 20 of the brushless motor 2. FIG. Thereby, the airtightness in the motor side edge part 125 and the fastening part 20j of the output shaft 20 is securable.

  Moreover, in the said embodiment, the latching | locking part 150 is the 1st latching | locking part 151 provided in the outer side of the terminal cover 10, and the 2nd latching | locking part provided in the inner side of the terminal cover 10, and the side which faces the fastening part 20j. 152, the terminal cover 10 can be firmly fixed to the base member 5 as compared with the case where the locking portion is provided only on either the outer side or the inner side of the terminal cover 10. Therefore, when the terminal cover 10 is attached to the base member 5 via the sealing material 40, the terminal cover 10 can be further prevented from floating from the base member 5.

Moreover, in the said embodiment, the 1st latching | locking part 151 is the 1st nail | claw part as the 1st cover side latching | locking part 13 provided in the terminal cover 10 and the 1st base side latching | locking part provided in the base member 5 53j, and the first cover side locking portion 13 connects the pair of first leg portions 13a extending from the outside of the top plate portion 11 toward the base member 5 and the end portions of the pair of first leg portions 13a. The first claw portion 53j is engaged with the first connection portion 13b from one side in the plate thickness direction, and the second engagement portion 152 is provided on the terminal cover 10. The cover side latching part 14 and the 2nd nail | claw part 53k as a 2nd base side latching part provided in the base member 5 are provided, and the 2nd cover side latching | locking part 14 is the inner side of the top-plate part 11, and A pair of second leg portions 14 extending toward the base member 5 from the side facing the fastening portion 20j. And a second connecting portion 14b that connects the end portions of the pair of second leg portions 14a, and the second claw portion 53k is locked to the second connecting portion 14b from one side in the plate thickness direction, The first connecting portion 13b is hooked on the first claw portion 53j while using the deflection of the first leg portion 13a, and the second connecting portion 14b is hooked on the second claw portion 53k while using the deflection of the second leg portion 14a. Thus, the terminal cover 10 can be easily locked to the base member 5. Further, by hooking the first connecting portion 13b and the second connecting portion 14b on the first claw portion 53j and the second claw portion 53k, respectively, the first connecting portion 13b and the second connecting portion 14b are compared with the case where only one connecting portion is hooked on the claw portion. Since the offset load with respect to the connection part 13b and the 2nd connection part 14b can be restrained small, the terminal cover 10 can be made still more difficult to remove. In addition, the locking portion 150 can be further prevented from being damaged by reducing the offset load on the first connecting portion 13b and the second connecting portion 14b.
Furthermore, the bending portion 13e is formed on the base end side of the first leg portion 13a, so that the bending action of the first leg portion 13a can be effectively exhibited using the bending portion 13e. .
The first connecting portion 13b is formed with a flat contact portion 13f that contacts the flat engaging surface of the first claw portion 53j, and the second connecting portion 14b is provided with a flat engaging portion of the second claw portion 53k. By forming the flat contact portion 14f that contacts the surface, the flat contact portion 13f of the first connecting portion 13b is brought into contact with the flat engaging surface of the first claw portion 53j and the second connecting portion. Since the flat contact portion 14f of 14b can be brought into contact with the flat engaging surface of the second claw portion 53k, the terminal cover 10 can be stably locked to the base member 5.
In addition, the first connecting portion 13b is formed with a tapered portion 13g inclined with respect to the plate thickness direction, and the second connecting portion 14b is formed with a tapered portion 14g inclined with respect to the plate thickness direction. Since the first claw portion 53j can be slid along the tapered portion 13g of the one connecting portion 13b and the second claw portion 53k can be slid along the tapered portion 14g of the second connecting portion 14b, the terminal cover 10 can be slid. Can be easily locked to the base member 5, and the bending action of the first leg portion 13a and the second leg portion 14a can be effectively exhibited.
Further, a tapered portion 53q that is inclined with respect to the thickness direction is formed at a portion of the first claw portion 53j facing the first cover side locking portion 13, and the second cover side locking portion 14 of the second claw portion 53k is formed. A tapered portion 53r that is inclined with respect to the plate thickness direction is formed at a portion that faces the thickness direction, and is slid along the tapered portion 53q of the first claw portion 53j and along the tapered portion 53r of the second claw portion 53k. Thus, the terminal cover 10 can be more easily locked to the base member 5, and the bending action of the first leg portion 13a and the second leg portion 14a can be more effectively exhibited. .

  In the controller 3 having the cover sealing structure, airtightness when the cover is attached to the base member 5 can be secured.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  In the above embodiment, the bus bar 100 is connected to the electronic component 6 and the power device 7 by resistance welding. However, the present invention is not limited to this, and may be performed by, for example, arc welding such as TIG welding or laser welding. .

  The materials, shapes, and the like of the base member 5, the casing 8, the main body cover 9, the terminal cover 10, the brushless motor 2, the bus bar 100, and the like are not limited to the above embodiment. For example, the bus bar 100 may be formed of aluminum. Moreover, you may form the housing | casing 8 with metal materials, such as iron (carbon steel).

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

2 Brushless motor (motor)
3 Controller 4 Terminal 5 Base member 8 Housing 10 Terminal cover (cover)
11 Top plate part 12 Cover wall part 12t Cover side taper part (taper part)
13 First cover side locking part (cover side locking part)
13a First leg (leg)
13b 1st connection part (connection part)
13c, 14c Thick part 14 Second cover side locking part (cover side locking part)
14a Second leg (leg)
14b 2nd connection part (connection part)
20j Fastening part 25a Power supply terminal 40, 41 Sealing material 40b, 41b Parting line 53a Base wall part 53j First claw part (claw part)
53k Second nail part (nail part)
53t Base side taper (taper)
150 Lifting prevention portion 151 First locking portion (locking portion)
152 Second locking part (locking part)
81a Motor connecting part 100 Bus bar (conductive plate material)

Claims (7)

An electric motor comprising a motor for rotationally driving an axial fan and a controller for controlling the motor,
The controller is
A base member on which a terminal for feeding the motor is disposed;
A housing attached to the base member,
The housing includes a wind receiving surface that receives wind generated by the rotation of the axial fan,
On the wind receiving surface,
A plurality of first heat radiating members extending in the motor axial direction along the axis of the output shaft of the motor;
An electric motor comprising: a second heat radiating member that couples the plurality of first heat radiating members.   The electric motor according to claim 1, wherein a third heat radiating member that protrudes in a direction orthogonal to the motor axial direction is provided on the wind receiving surface.   The electric motor according to claim 2, wherein the third heat radiating member extends in the motor axial direction. In the base member, a position for receiving wind by rotation of the axial fan is provided with a power feeding connector for the motor protruding in a direction perpendicular to the motor axial direction,
The electric motor according to any one of claims 1 to 3, wherein a receiving port of the external connector in the connector opens to the outside in a direction orthogonal to the motor shaft direction.   The electric motor according to claim 1, wherein the casing is made of aluminum. The casing is provided with a flange portion extending in a direction orthogonal to the motor shaft direction,
The electric motor according to any one of claims 1 to 5, wherein a through hole that opens in the motor axial direction is formed in the flange portion. The first heat dissipation member is formed in a pin shape,
The said 2nd heat radiating member is formed in the rib shape which makes the linear form which connects the edge parts of these 1st heat radiating members, The 1st to Claim 6 characterized by the above-mentioned. Electric motor.

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