CN110521092A - Motor with a stator having a stator core - Google Patents

Abstract

The motor has: a rotor; a stator; a resin case sealing at least the insulator and the winding of the stator; a plurality of bearings rotatably supporting the rotary shaft at positions separated from each other in an axial direction; a cover that covers an outer peripheral surface of the resin case; and a conductive member having conductivity, wherein the stator includes a plurality of bearing housing members for housing the plurality of bearings, respectively, the conductive member is supported by the cover, the conductive member has a contact portion contacting the stator core on one side and a grounding portion grounded on the other side, and the bearings are electrically insulated from the conductive member.

Description

Motor

Technical field

The present invention relates to motors.

Background technique

In recent years, (the hereinafter referred to as side PWM in a manner of PWM (Pulse Width Modulation: pulse width modulation) Formula) motor that is driven increasing.With PWM mode drive motor, the neutral point potential of winding is not It is zero, generates potential difference (hereinafter referred to as shaft voltage) between the outer ring of bearing and inner ring sometimes.If shaft voltage becomes constant Voltage, then have an electric current flowing in Bearing inner, and generate galvanic corrosion in Bearing inner.The galvanic corrosion of bearing becomes vibration and noise Reason.Thus, for example Patent Document 1 discloses the motor for the generation for inhibiting shaft voltage.

Motor documented by patent document 1 includes stator, is using insulating resin to after comprising having wound winding What the fixation member including stator core was molded；Rotor is opposed to configure centered on axis with stator；Bearing, It will be pivotally supported to rotate freely；Bearing is fixed in bracket；And drive circuit board, it is mounted with to carry out winding The driving circuit of driving.Moreover, cored connection terminal is connected in stator core, by the way that iron core connection terminal is inserted in driving Circuit board is electrically connected stator core with the ground connection as zero potential benchmark on drive circuit board.

Stator core be considered as in the driving of the switch element of drive motor on bearing inner race and bearing outer ring The voltage generation source for inducing high frequency voltage, by making stator core for the grounding connection on stator core and drive circuit board Current potential be zero potential, reduce shaft voltage.

Existing technical literature

Patent document

Patent document 1: International Publication No. 2010/067614

Summary of the invention

Subject to be solved by the invention

In the motor documented by patent document 1, make conductive member using conductive member is contacted with stator core The structure being connect with drive circuit board, therefore substrate is also required to for the motor for not needing driving circuit.In addition, due to Conductive member is embedded to the inside of moulded resin, therefore, needed sometimes in the molding of moulded resin so that conductive member not Offset, indeformable mode are formed, thus effort is spent in molding.

In addition, moulded resin keeps conductive member, by external force in conductive member, can go out in moulded resin Existing crackle or the opening clearance between conductive member and moulded resin.External moisture is easy to be immersed in moulded resin as a result, Inside or conductive member do not contacted with stator core, cannot obtain galvanic corrosion reply effect.

Therefore, the object of the present invention is to provide the increases for being able to suppress number of components, and are able to carry out for outside The protection of impact and the galvanic corrosion reply of bearing.

Means for solving the problems

The motor of illustration of the invention is characterized in that, includes rotor, has the rotation extended along central axis Axis；Stator, has multiple windings across insulator on stator core, the stator core radially with described turn The outer peripheral surface of son is opposed；Resin enclosure seals at least described insulator and the winding of the stator；Multiple bearings, it The rotation is being pivotally supported can to rotate along the position that axial direction is separated from each other；Cover, covers the resin enclosure Outer peripheral surface；And energized components, conductive, the stator is multiple with being stored respectively to the multiple bearing Bearing storage member, the energized components are supported by the cover, and the energized components have in side to be connect with the stator core The contact portion of touching has the grounding parts of ground connection in the other side, and the bearing is electrically insulated with the energized components.

Invention effect

According to the motor of the invention of illustration, the increase for being able to suppress number of components can be provided, and cope with axis The motor for the galvanic corrosion held.

Detailed description of the invention

Fig. 1 is the exploded perspective view of an example of motor of the invention.

Fig. 2 is the cross-sectional view of motor shown in FIG. 1.

Fig. 3 is the perspective view of stator core.

Fig. 4 is the perspective view of stator core possessed by stator.

Fig. 5 is the perspective view of rotor.

Fig. 6 is the resin enclosure for the variation of motor for showing the 1st embodiment and the partial sectional view of cover.

Fig. 7 is the resin enclosure for other variations of motor for showing the 1st embodiment and the partial sectional view of cover.

Fig. 8 is another exploded perspective view of motor of the invention.

Fig. 9 is the cross-sectional view of motor shown in Fig. 8.

Figure 10 is the cross-sectional view of the another example of motor of the invention.

Figure 11 is the exploded perspective view of the another example of motor of the invention.

Figure 12 is the cross-sectional view of motor shown in Figure 11.

Figure 13 is the cross-sectional view of the variation of the motor of the 4th embodiment.

Figure 14 is the cross-sectional view of the another example of motor of the invention.

Specific embodiment

Hereinafter, being illustrated referring to attached drawing to embodiment illustrated of the invention.

The 1st embodiment > of < 1.

Fig. 1 is the exploded perspective view of an example of motor of the invention.Fig. 2 is the cross-sectional view of motor shown in FIG. 1.In addition, In the following description, left and right directions in the direction that is extended using central axis Ax, i.e. Fig. 2 is as axial.In addition, with axis To vertical direction as radial direction, by the tangential direction of the circle using centered on axis as circumferentially.

In addition, in the present specification, being set as follows about axial referring to Fig. 2.That is, in Fig. 2, it will be towards the axial right side The direction of side is set as the 1st direction Op, will be set as the 2nd direction Or towards the direction in left side.In addition, " the left in this specification To ", " right direction " be in order to illustrate and set.Therefore, these directions do not limit direction when actually using motor A.

The structure > of 1.1 motor of <

As shown in Figure 1, the motor A of present embodiment has stator 1, resin enclosure 2, cover 3, rotor 4, the 1st bearing 51, the 2 bearings 52 and energized components 8.The outer peripheral surface of the covering stator 1 of resin enclosure 2.That is, motor A is to seal to determine using resin enclosure 2 The so-called moulding motor of son 1.Rotor 4 is configured at the inside of stator 1.Rotor 4 has the rotary shaft extended along central axis Ax 40.Moreover, rotary shaft 40 is supported by the 1st bearing 51 and the 2nd bearing 52, can be rotated relative to stator 1.That is, present embodiment The motor A inner-rotor type DC brushless motor that be rotor 4 rotate in the inside of stator 1.Moreover, multiple bearings (51,52) are on edge Rotary shaft 40 is supported as that can rotate at the position being axially separated from each other.

The structure > of 1.2 stator of <

Stator 1 is illustrated referring to new attached drawing.Fig. 3 is the perspective view of stator core.Fig. 4 is fixed possessed by stator The perspective view of sub- iron core.As shown in Figure 3, Figure 4, stator 1 has stator core 11, insulator 12 and winding 13.Moreover, stator 1 has multiple windings 13 across insulator 12 on stator core 11, and the outer peripheral surface of the stator core 11 and rotor 4 exists It is radially opposed.In addition, stator 1 is with the 1st bearing storage member 61 stored to the 1st bearing 51 and to the 2nd bearing 52 The 2nd bearing storage member 62 stored.That is, stator 1 has the multiple axis stored respectively to multiple bearings (51,52) Hold storage member (61,62).

Stator core 11 is conductive.As shown in figure 4, stator core 11 has cricoid core-back 111 and teeth portion 112.Core-back 111 is in the ring-type axially extended.The inner circumferential of teeth portion 112 from core-back 111 is prominent towards radially inner side. As shown in figure 4, stator core 11 has 12 teeth portion 112.Teeth portion 112 circumferentially, equally spaced arranges.That is, in present embodiment Motor A in, stator 1 have 12 tooth sockets.

Insulator 12 covers stator 11.Insulator 12 is the formed body of resin.Insulator 12 covers entire teeth portion 112, and And cover two axial end faces of core-back 111.Insulator 12 includes insulator teeth portion 121, covers teeth portion 112；With And insulator core-back 122, cover at least axial end portion of core-back 111.Wire-wound is covered in insulated body 12 The teeth portion 112 (insulator teeth portion 121) of lid and form winding 13.Stator core 11 and winding 13 are insulated by insulator 12. In addition, in the present embodiment, insulator 12 is the formed body of resin, and but not limited thereto.Can be widely used can will determine The structure that sub- iron core 11 insulate with winding 13.

As described above, insulator 12 insulate stator core 11 and winding 13.Therefore, in stator core 11, iron core back The radial outer peripheral surface in portion 111 can also the non-cladding of insulated body 12 and expose.In addition, stator core 11 can be using stacking electricity It is constructed made of magnetic steel plate, is also possible to a component made of firing, casting of powder etc..In addition, stator core 11 can be with Using the structure that can be divided into the segmentation iron core comprising 1 teeth portion 112, can also be formed using band-like component is wound Structure.

Winding 13 is configured at each teeth portion 112 of stator core 11.That is, being configured with 12 windings 13 in motor A.And And 12 windings 13 possessed by stator 1 are divided into 3 systems (hereinafter referred to as three-phase) according to the opportunity for providing electric current.It should Three-phase is set to U phase, V phase, W phase.That is, stator 1 has 4 U phase windings, 4 V phase windings and 4 W phase windings.In addition, In the following description, the winding of each phase is referred to as winding 13 and be illustrated.

Wire connecting portion 131 is taken in addition, having in stator 1, this is taken wire connecting portion 131 and multiple windings 13 are connected to each other or are incited somebody to action Winding 13 is electrically connected with control circuit (not shown), which is mounted on substrate Bd possessed by motor A.Moreover, taking Wire connecting portion 131 is configured at wiring portion 120 possessed by insulator core-back 122, which covers insulation The axial end face of the core-back 111 of body 12.In addition, as shown in Fig. 2, stator 1 is in the 1st direction of covering core-back 111 The face of the radial outside of the insulator 12 of the end face of the side Op has the wiring portion 120 configured with overlap joint line 131.

The structure > of 1.3 resin enclosure of < and cover

Shown in waiting as shown in Figure 1, Figure 2, the cylindrical shape of resin enclosure 2.Resin enclosure 2 be in internal sealed stator iron core 11 and At resin molded body.That is, at least insulator 13 and winding 12 of 2 sealed stator 1 of resin enclosure.In addition, such as Fig. 2 institute Show, in motor A, the radial outer surface of stator core 11 is also capped.Resin enclosure 2 is in the end of the 1st direction side Op What at least part was closed has bottom cylindrical shape.Moreover, the radial center portion in bottom is provided with the resin axially extended Shell aperture 20.

Radial outside in the resin enclosure hole 20 in the face of the 1st direction side Op of bottom is provided with the shrinkage pool along axial depression 21.The rotary shaft 40 of rotor 4 is installed on axially through resin enclosure hole 20.In addition, passing through inserts in resin enclosure hole 20 Molding is fixed with the 1st bearing storage member 61.In addition, being explained below in detail about the 1st bearing incorporating section 61.

Shown in waiting as shown in Figure 1, Figure 2,3 covering resin shells 2 are covered.Cover 3 is closed at least part of the end of the 1st direction side Op That closes has bottom cylindrical shape.That is, cover 3 is in the tubular axially extended.Cover 3 is, for example, and to metal plate progress extrusion process It is formed.Moreover, the bottom of cover 3 radial central portion have along axially through cage apertures 30.Moreover, in the radial direction of cage apertures 30 Outside has the shell contact portion 31 that inside (being the 2nd direction side Or in Fig. 2) charges into the axial direction.That is, radial direction of the cover 3 in bottom Central part has the shell contact portion 31 charged into inwardly, has cage apertures 30 in the center of shell contact portion 31.

1st direction Op side of the resin enclosure 2 in Fig. 2 is inserted in cover 3.Moreover, the aftermentioned indentation of press-in portion 22 is in cover 3. When being pressed into resin enclosure 2 in cover 3, shell contact portion 31 is be overlapped in the axial direction with shrinkage pool 21.Also, resin enclosure hole 20 with Cage apertures 30 is also overlapped in the axial direction.Rotary shaft 40 runs through resin enclosure hole 20 and cage apertures 30.

In addition, shell contact portion 31 is contacted with shrinkage pool 21 when being pressed into resin enclosure 2 in cover 3.Shell contact portion 31 is pressed Hole 21 is pressed, is close to resin enclosure 2 with cover 3.Inhibit as a result, the gas of boundary part from resin enclosure 2 and cover 3, water, Dust, dust etc. enter from the boundary part of resin enclosure hole 20 and cage apertures 30.

Next, being illustrated to resin enclosure 2 to the installation of cover 3.Resin enclosure 2 has press-in portion in outer radial periphery face 22 and recess portion 23.That is, resin enclosure 2 has the press-in portion 22 for the inside for being pressed into cover 3.As shown in Fig. 2, the configuration of press-in portion 22 exists The outer peripheral surface of resin enclosure 2 with the be overlapped part radially of stator core 11.That is, when radially observing resin enclosure 2, Press-in portion 22 is Chong Die with stator core 22.Resin enclosure 2 is inserted in the opening of cover 3 from the end for the side for being formed with recess portion 23. Then, resin enclosure 2 is fixed on cover 3 by indentation.

That is, resin enclosure 2 is pressed into press-in portion 22 in the inner peripheral surface of cover 3.The configuration of press-in portion 22 exists with stator core 11 The position being radially overlapped.In indentation, from cover 3 to the active force radially and axially of resin enclosure 2.It is configured by press-in portion 22 With the be overlapped position radially of stator core 11, even if resin enclosure 2 is also not easy to produce in indentation from 3 active force of cover Shape that changes etc., wherein the intensity of the stator core 11 is higher than the resin of resin enclosure 2.

Recess portion 23 and the wiring portion 120 of the insulator 12 of the outer peripheral surface of resin enclosure 2 are be overlapped radially, the wiring portion 120 configured with taking wire connecting portion 131.Recess portion 23 is set to the end of the 1st direction side Op of resin enclosure 2, continuously in a circumferential landform At.In the present embodiment, it is formed in the longitudinal end of resin enclosure 2, but not limited thereto.

In addition, according to the condition of the installation position of motor A, the water condensation that includes in the air of the inside of motor A sometimes and Contain condensed water.The also air accumulation in recess portion 23, the hydrogenesis for including in the air accumulated sometimes.Therefore, in resin The outer peripheral surface of shell 2 configures the groove 200 extended from recess portion 23 towards the 2nd direction side Or.

The condensed water in recess portion 23 is accumulated in as a result, by groove 200, and between the 2nd bearing storage member 62 and cover 3 It is discharged to outside.In addition, such as using by circuit isolation to generating condensed water not by or be not readily susceptible to In the case where the construction of influence, groove 200 also can be omitted.Even if groove 200 is omitted, condensed water can also drive because of motor A When heat and in the air evaporation of recess portion 23.In addition, can not be by condensed water to outside resin enclosure due tos shape of cover etc. In the case that portion is discharged, perforation can also be formed to external drainage hole in cover or bearing storage member, be carried out using drainage hole Draining.

Resin enclosure 2 is inserted in cover 3 from the side for being provided with recess portion 23 in the axial direction, is fixed by indentation.It is setting When rouge shell 2 is pressed into the inside of cover 3, the inner surface of the part and cover 3 that are formed with recess portion 23 is formed with clearance G p radially. In addition, being explained below in detail about the resin enclosure 2 and clearance G p of cover 3.

In addition, as shown in Fig. 2, the radial thickness of part possessed by the recess portion 23 of resin enclosure 2 is than resin enclosure 2 The thickness of other parts is thin.That is, being provided with the part of recess portion 23 is the thickness thinner wall section 24 thinner than other parts.Electric current is overlapping It is flowed in line portion 131, wire connecting portion 131 is taken in heating sometimes.At this point, by being formed with thinner wall section 24 being easy that wire connecting portion 131 will be taken External release of the heat to resin enclosure 2.

The structure > of 1.4 rotor of <

Fig. 5 is the perspective view of rotor.As shown in figure 5, rotor 4 has rotor core 41, multiple magnet 42 and molding section 43.Rotor core 41 includes barrel shape component 411, axially extends；And shaft supporting part 412, it is configured at barrel shape Component radially inner side.The molding section 43 that cartridge 411 and shaft supporting part 412 pass through the molded body as resin It is fixed to each other.Rotor core 41 is magnetic substance.Rotor core 41 can be the laminated body for being radially laminated magnetic sheet, example Such as it is also possible to be formed as the formed body of the same part by being sintered powder.

40 cylindrical form of rotary shaft.Rotary shaft 40 is through the radial center portion of the shaft supporting part 412 of rotor core 41. Rotary shaft 40 and shaft supporting part 412 are relatively fixed.In addition, indentation, welding etc. can be enumerated as fixing means, but do not limit In this.Method that can be fixed by rotary shaft 40 and shaft supporting part 412 can be widely used.Turn that is, rotary shaft 40 is fixed on Son 4 rotates rotary shaft 40 centered on central axis Ax by rotating rotor 4.

Multiple magnet 42 are configured at the radial outside of rotor core 41.In the rotor 4 of present embodiment, by multiple magnet 42 are circumferentially arranged.For example, rotor core 41 has 8 magnet 42.In addition, in the present embodiment, being arranged multiple Magnet 42, but not limited thereto.For example, being directed to columnar magnetic substance, it also can be used and replace the pole N and the pole S in the circumferential Magnet obtained by magnetization.

That is, using the pole N and the pole S as 1 pair of magnetic pole, there are multiple 1 pair of magnetic pole in rotor core 41.Magnet 42 is for example Rotor core 41 is fixed in by the molding etc. of resin.In addition, the fixing means of magnet 42 is not limited to the molding of resin, Can be using bonding, welding, mechanical anchoring methods etc., which are not given or are not easy, brings dysgenic method to the rotation of rotor 4.

The structure > of 1.5 bearing of <

Rotary shaft 40 is pressed at two positions being axially separated in the 1st bearing 51 and the 2nd bearing 52.That is, rotary shaft 40 It is that can rotate by the two positions bearing different in the axial direction of the 1st bearing 51 and the 2nd bearing 52.In the inner ring of the 2nd bearing 52 Indentation has the end of the 2nd direction side Or of rotary shaft 40.There is the indentation than rotary shaft 40 in the in the inner ring indentation of the 1st bearing 51 The part of the 1st direction side Op is leaned in the part of 2 bearings 52.

1st bearing 51 is incorporated in the 1st bearing storage member 61.2nd bearing 52 is incorporated in the 2nd bearing storage member 62.1st bearing storage member 61 and the 2nd bearing storage member 62 are directly or indirectly fixed on resin enclosure 2, and detailed content is rear Face explanation.Rotary shaft 40 by 1 pair of bearing 51,52 is supported on resin enclosure 2 in a manner of it can rotate (what is covered determines as a result, Son is 1).

Shaft retaining ring 401 is installed in the 1st direction side Op of rotary shaft 40, axle bumper is installed in the end of the 2nd direction side Or Circle 402.Shaft retaining ring 401 is contacted with the 1st bearing 51.Shaft retaining ring 402 is contacted with the 2nd bearing 52.In addition, shaft retaining ring 401 and axle bumper Circle 402 is embedded in slot and is fixed, which is set to the outer peripheral surface of rotary shaft 40.The inner ring of shaft retaining ring 401 and the 1st bearing 51 The 2nd direction Or side contacts.It is mobile to the 1st direction side Op relative to the 1st bearing 51 that shaft retaining ring 401 limits rotary shaft 40.

1st direction Op side contacts of the inner ring of shaft retaining ring 402 and the 2nd bearing 52.It is opposite that shaft retaining ring 402 limits rotary shaft 40 It is mobile to the 2nd direction side Or in the 2nd bearing 52.1st bearing 51 and the 2nd bearing 52 relative to stator 1 axial movement by phase To limitation, so that rotary shaft 40 is limited relative to the axial movement of stator 1.In addition, shaft retaining ring 401,402 is for example usually adopted With referred to as C ring, the shaft block ring of E ring, but not limited thereto.It can be widely used and be connect with 1 pair of bearing 51,52 respective inner rings Touching is to limit the structure of the movement of rotary shaft 40.In addition, in each embodiment in the present specification, by two bearings the (the 1st Bearing 51 and the 2nd bearing 52) rotary shaft 40 is supported for that can rotate, but not limited thereto.It can also be by 3 or more bearings It is supported.

The structure > of 1.6 bearing storage member of <

Here, the 1st bearing storage member 61 and the 2nd bearing storage member 62 are that iron, brass etc. are metal.

The 1st bearing storage member > of < 1.6.1

1st bearing storage member 61 has in the internal barrel shape that can store the 1st bearing 51.1st bearing storage member The end of 61 axial side has for rotary shaft 40 axially through the end face portion 610 of radial center part.In addition, the 1st axis The end for holding the axial other side of storage member 61 has the flange part 611 that radially outside extends.At least the one of flange part 611 Portion insert takes shape in resin enclosure 2.Resin enclosure 2 is fixed on by insert-molding in 1st bearing incorporating section 61.In addition, convex Edge 611 also can be set along axially through transfixion part.By, in transfixion part potting resin, being limited in insert-molding The circumferential movement of 1st bearing storage member 61 carries out rotation stop.

In addition, transfixion part is not limited to hole, such as is also possible to diameter if reliably carrying out rotation stop by resin The recess portion that is recessed inwardly or to radial outside protrusion outstanding.Alternatively, it is also possible to by making itself polygon of flange part 611 Shapes such as (such as triangles, quadrangle) or rotation stop is carried out for ellipse.1st bearing storage member 61 is so that central axis The consistent mode of central axis Ax for the stator 1 that line and resin enclosure 2 are covered is fixed on resin enclosure 2.It is stored in the 1st bearing The inside indentation of component 61 has the outer ring of the 1st bearing 51.

Moreover, when resin enclosure 2 is pressed into cover 3, the 1st bearing storage member 61 of insert-molding on resin enclosure 2 Axially through the cage apertures 30 of cover 3.At this point, cover 3 is non-contacting with bearing storage member 61.That is, cover the 3 and the 1st bearing storage Component 61 is electrically insulated.

The 2nd bearing storage member > of < 1.6.2

As shown in Fig. 2, the 2nd bearing storage member 62 keeps the 2nd bearing 52.2nd bearing storage member 62 has Incorporating section 621 and outer cylindrical portion 620.The shape cylindrical in shape of incorporating section 621 stores the 2nd bearing 52 in inside.In the inside of incorporating section 621 Indentation has the outer ring of the 2nd bearing 52.

The diameter of outer cylindrical portion 620 is bigger than incorporating section 621, and in the inside of outer cylindrical portion 620, indentation has the 2nd side of resin enclosure 2 To the end of the side Or.Then, by being pressed into resin enclosure 2 in the 2nd bearing storage member 62, by the 2nd bearing 62 relative to tree The stator 1 that rouge shell 2 is covered is fixed.The outer ring of 2nd bearing 52 is fixed relative to stator 1, the central axis of the 2nd bearing 52 with The central axis Ax of stator 1 is consistent.In addition, cover 3 makes the end of the 2nd direction side Or be axially away from the 2nd bearing storage member 62 outer cylindrical portion 620.That is, cover 3 is electrically insulated with bearing storage member.

As shown in Fig. 2, incorporating section 621 and outer cylindrical portion 620 are formed by the same part.In addition, here, the 2nd bearing incorporating section Part 62 is produced and carrying out crimped processing to metal plate.But it is not limited to this.

1.7 energized components > of <

Motor A is brushless DC motor.Therefore, motor A has inverter circuit (not shown) in driving circuit.Moreover, In drive motor A, high-frequency high-voltage is induced in stator core 11 sometimes.Because of the voltage induced in stator core 11 And potential difference is generated between the 1st bearing 51 and the respective inner ring of the 2nd bearing 52 and outer ring.Potential difference in inner ring and outer ring is super When crossing certain value, electric discharge (fire is generated between the 1st bearing 51 and the outer ring and ball of the 2nd bearing 52, between inner ring and ball sometimes Flower) generated because generating electric discharge the outer ring of bearing, ball and inner ring surface damage so-called bearing galvanic corrosion.1st bearing The galvanic corrosion of 51 and the 2nd bearing 52 can become the reason of vibration and noise of motor A.The reason of as galvanic corrosion, has enumerated using high The case where frequency high voltage drives the switch element for including in the inverter circuit of drive motor A.In addition, as except this with The main reason for outer, has also enumerated stator core, potential state of rotor core 41 etc..

Therefore, in the motor A of present embodiment, using energized components 8, make stator core 11 and be provided with motor A's The grounding point (reference voltage) of device is electrically connected.As a result, decline the voltage of stator core 11, inhibits by stator core 11 The generation of galvanic corrosion caused by the voltage induced.

In motor A, energized components 8 are conductive.As shown in Fig. 2, energized components 8 include contact portion 81 and grounding parts 82.As shown in Fig. 2, grounding parts 82 include lead etc., it is electrically connected with the grounding point (frame ground) for the device for being equipped with motor A. In addition, contact portion 81 and grounding parts 82 are connected in energized components 8.Moreover, contact portion 81 is contacted with stator core 11.That is, logical Electrical components 8 have the contact portion 81 contacted with stator core 11 in side, have the grounding parts 82 of ground connection in the other side.In this way, Contact portion 81 is contacted with stator core 11, and the grounding parts 82 be connected with contact portion 81 are electrically connected with grounding point (frame ground), by This can be such that the current potential of stator core 11 declines.

As shown in Fig. 2, contact portion 81 is screw in motor A, there are interconnecting piece 811, overhead 812 and planar portions 813.That is, interconnecting piece 811 is external thread part, overhead 812 is the head of screw.Interconnecting piece 811 is in have externally threaded cylinder Shape.In the end of the side (being radial outside in Fig. 2) of interconnecting piece 811, head is formed by component identical with the interconnecting piece 811 Top 812.Face 813 is the face of 811 side of interconnecting piece of overhead 812, is plane.That is, energized components 8 are provided with interconnecting piece 811, and the end of the side of interconnecting piece 811 is provided with overhead 812.Moreover, interconnecting piece 811 and overhead 812 are by same Component is formed.In addition, planar portions 812 are the faces of 811 side of interconnecting piece of overhead 812, it is plane.

The end of the side (other side) opposite with overhead 812 of the interconnecting piece 811 of contact portion 81 is in energized components 8 Run through the cover 3 of the outer peripheral surface of resin enclosure 2 and covering resin shell 2 at contact portion 81 inwardly from radial outside.Moreover, contact The external screw thread of the front end in portion 81 is installed in a manner of engaging with the internal screw thread for the threaded hole 110 for being set to stator core 11.As a result, Interconnecting piece 811 is contacted with stator core 11.That is, the end of the other side of interconnecting piece 811 is contacted with stator core 11.Interconnecting piece 811 external screw thread is also installed in a manner of engaging with the internal screw thread of the threaded hole 302 of cover 3.The bearing of 8 quilt cover 3 of energized components.Separately Outside, the periphery face contact of planar portions 813 and cover 3.That is, the outer surface of cover 3 is contacted with the planar portions 813 of overhead 812.Conducting parts Part 8 is supported by the intensity cover 3 higher than resin enclosure 2, even if cover 3 also can thus in the case where outer masterpiece is used for energized components 8 Resist external force.Thus it is not easy to apply excessive power to resin enclosure 2, it is not easy to generate unfavorable condition.

Moreover, the end of the lead as grounding parts 82 is folded by the outer peripheral surface of planar portions 813 and cover 3.Moreover, making to be grounded The end of the side opposite with planar portions 813 in portion 82 is connect with the grounding point (frame ground) for the device for being equipped with motor A.By This, can be such that the current potential of stator core 11 declines.In addition, grounding parts 82 can also be connect with ground wire, the ground wire and frame ground It is provided separately.

As shown in Fig. 2, the 1st bearing storage member 61 is electrically insulated with cover 3.In addition, the 2nd bearing storage member 62 and 3 electricity of cover Insulation.That is, cover 3 is electrically insulated with bearing storage member (61,62).1st bearing storage member 61 and the 2nd bearing incorporating section as a result, Part is electrically insulated with energized components 8.That is, bearing (51,52) is electrically insulated with energized components 8.In addition, in the present embodiment, passing through So that cover 3 and bearing storage member (61,62) is insulated, so that bearing and energized components is insulated, but not limited thereto.For example, it is also possible to Bearing and bearing storage member is set to insulate.In addition, in addition to this, it can also be widely used and bearing is electrically insulated with energized components Method.

In addition, in the present embodiment, the front end of interconnecting piece 811 is screwed into the threaded hole 110 of stator core 11, but It, can also be without being screwed into as long as conducting interconnecting piece 811 with stator core 11.In addition, the contact as energized components 8 Portion is illustrated by taking screw as an example, however, not limited to this, wherein, which has external screw thread in interconnecting piece 811 and have The overhead 812 as head of screw formed by component identical with external screw thread.As contact portion, such as riveting can be widely used Nail, cotter pin etc. can contact with stator core 11 and make the structure of the periphery face contact of overhead and cover 3.In addition, as connecing Contact portion 81 is also possible to be inserted into the front end for the lead that grounding parts 82 are included in the hole for being set to resin enclosure 2 and cover 3, It is adhered to obtained by stator core 11 using conductive bonding agent.Contact portion 81, which can be widely used, can make grounding parts 82 structures conducted with stator core 11.

1.8 other structures portion > of <

As shown in Fig. 2, the 2nd direction Or side pressure of resin enclosure 2 enters the outer of the 2nd bearing storage member 62 in motor A Canister portion 620.Therefore, the foreign matters such as water, dust, the dust from outer cylindrical portion 620 Yu the gap of resin enclosure 2 is inhibited to enter.It is another Aspect, the end face portion 610 of the 1st direction side Op of motor A is the shape between rotary shaft 40 for the perforative part of rotary shaft 40 At the size for having gap, so that not interfering the rotation of rotary shaft 40.The foreign matters such as water, dust, dust are easy to immerse from the gap To the inside of motor A.Therefore, there is the bearing for inhibiting the entrance of the foreign matter from the 1st bearing storage member 61 in motor A Side intrusion, which prevents component 71 and axis side from invading, prevents component 72.

As shown in Fig. 2, the intrusion of bearing side prevents the outer surface of the 1st bearing storage member 61 of covering of component 71.Moreover, surrounding It the outside of rotary shaft 40 and radially extends.In addition, the intrusion of bearing side prevents component 71 from being formed such as the material as rubber, with 1st bearing storage member 61 is close to.In addition, the intrusion of bearing side prevents component 71 to have gap between rotary shaft 40, that is, with Non-contacting mode is maintained to install.

In addition, the intrusion of axis side prevents component 72 from matching in a manner of surrounding bearing side and invade the radial outside for preventing component 71 It sets.The intrusion of axis side prevents component 72 from configuring in the slot 400 possessed by rotary shaft 40.Axis side intrusion preventing portion is limited as a result, The axial movement of part 72.Prevent component 71 and axis side from invading the space prevented between component 72 by reducing the intrusion of bearing side, Foreign matter is inhibited to enter to motor A.That is, by preventing component 71 and the intrusion of axis side from preventing component 72 intrusion of bearing side while installing In motor A, play the role of that foreign matter is inhibited to enter to the inside of motor A.

The intrusion of axis side prevents a part of the front end of the 2nd direction side Or of component 72 Chong Die with shrinkage pool 21.In addition, cover 3 Shell contact portion 31 is also configured at shrinkage pool 21, but the intrusion of axis side prevents component 72 with solid with the non-contacting state of shell contact portion 31 Due to rotary shaft 40.That is, the intrusion of axis side prevents a part of the opening of component 72 to be configured in shrinkage pool 21.Moreover, shell contacts It is non-contacting that portion 31, which prevents component 72 with the intrusion of axis side, therefore is not intended to limit the rotation of rotary shaft 40.

In addition, the ratio stator 1 in resin enclosure 2 has substrate Bd and screening glass Is by the position of the 2nd direction side Or.Substrate Bd, which is equipped with the control circuit that opportunity, the size of electric current of electric current etc. that opposite multiple windings 13 provide are controlled, (not to scheme Show).In addition, there is also the situations that control circuit is set to the outside of motor A, in this case, substrate Bd also can be omitted.It protects Bluff piece Is is arranged in the insulating element between substrate Bd and the 2nd bearing storage member 62.It is the 2nd bearing incorporating section in order to prevent Short circuit between part 62 and substrate Bd and configure.In the case where using the motor without substrate Bd, guarantor also can be omitted Bluff piece Is.

The movement > of 1.9 motor of <

The movement of motor A illustrated above is illustrated.In drive motor A, electric current is provided to winding 13.At this point, Winding 13 generates heat because of electric current.At this point, being heated stator core 11 also because of the heat of winding 13.Stator core 11 and winding 13 It is covered by resin enclosure 2.The heat of stator core 11 and winding 13 is passed to resin enclosure 2.

The heat of resin enclosure 2 is transferred to cover 3.Cover 3 mainly uses metal material, and linear expansion coefficient is than resin enclosure 2 It is small.The difference of the deflection based on thermal expansion of resin enclosure 2 and cover 3 is generated as a result,.But in the press-in portion of resin enclosure 2 22 In, indentation has resin enclosure 2 and cover 3.Therefore, the heat of resin enclosure 2 is transferred to cover 3 and is radiated, therefore, in press-in portion 22 In, it is suppressed that the thermal expansion of resin enclosure 2.

In resin enclosure 2, in the part being staggered in the axial direction relative to press-in portion 22, sealed absolutely using resin enclosure 2 Edge body 12.Insulator 12 is resin, and the linear expansion coefficient of insulator 12 is bigger than stator core 11.Therefore, compared to stator iron The press-in portion 22 that core 11 is overlapped radially, resin enclosure 2 with stator core 11 radially nonoverlapping part based on The deformation to radial outside of thermal expansion is bigger.In addition, distance of the stator core 11 away from cover 3 is bigger, therefore thermal diffusivity is than indentation Portion 22 is poor.Therefore, strain, the offset of resin enclosure 2 are generated due to the difference based on the deflection of thermal expansion of insulator 12 and cover 3 A problem that.

In addition, the open side (being the 2nd direction side Or in Fig. 2) of cover 3 about resin enclosure 2, resin enclosure 2 based on The deformation of thermal expansion is discharged to open side.On the other hand, 3 inboard (in Fig. 2 for the 1st direction side Op) is covered for based on heat The position of the deformation release of expansion.Therefore, in motor A, in the radial outside of insulator 12, between cover 3 and resin enclosure 2 With clearance G p.

The position (the especially inboard of pressing direction) of resin enclosure 2 being staggered in the axial direction with stator core 11 as a result, The resin enclosure 2 at place and the difference of the deflection of cover 3 are absorbed by clearance G p.Thereby, it is possible to inhibit by the base of resin enclosure 2 and cover 3 A problem that strain of the resin enclosure 2 caused by the difference of the deflection of thermal expansion, offset.

Motor A according to the present embodiment, in the biggish part of difference of resin enclosure 2 and the deflection based on heat of cover 3 It is provided with gap.The difference of the deflection based on heat of resin enclosure 2 and cover 3 is absorbed, by clearance G p so as to inhibit by heat Strain caused by the difference of deflection, offset etc..In addition, being able to easily form resin by forming recess portion 23 in resin enclosure 2 The gap of shell 2 and cover 3.Also, the part with recess portion 23 of resin enclosure 2, i.e. being weighed radially with recess portion 23 in Fig. 2 Folded part is the thinner wall section 24 thinner than the other parts of resin enclosure 2.In this way, being easy will be in electricity by setting thinner wall section 24 Flow external discharge of the heat generated when taking wire connecting portion 131 and flowing to resin enclosure 2.

In the present embodiment, the energized components 8 contacted with cover 3 are grounded to grounding point (frame ground).Grounding point (frame Bridge joint) be device reference voltage, such as driving by motor A or power circuit (not shown) etc. influenced, and sometimes Generate deviation.Moreover, if reference voltage deviation grounding point connect the 1st bearing 51 and the 2nd bearing 52 outer ring, basis Condition, it is possible to lead to the generation of galvanic corrosion.Therefore, in motor A, the 1st bearing storage member 61 and the 2nd bearing storage member 62 It insulate with cover 3, wherein the outer ring of the 1st bearing storage member 61 and the 1st bearing 51 conducts, the 2nd bearing storage member 62 It is conducted with the outer ring of the 2nd bearing 52.Thus, it is suppressed that the 1st bearing 51 and the 2nd bearing 52 connect with grounding point (frame ground) It connects, to inhibit the galvanic corrosion generated by the deviation of reference voltage.In addition, as described above, voltage about stator core 11, By connecting with grounding point (frame ground), make voltage drop down to reference voltage.It is further suppressed as a result, according to by stator core 11 The induced voltage of generation and the galvanic corrosion generated.

In motor A, by inhibiting the generation of bearing galvanic corrosion, the 1st bearing 51 and the 2nd bearing 52 can be made in the longer phase It is interior accurately to rotate.Thereby, it is possible to act moulding motor A steadily during longer.That is, can make to mould horse Up to A long lifetime.

1.10 variation > of <

1 > of < 1.10.1 variation

Referring to attached drawing, the variation of motor shown in present embodiment is illustrated.Fig. 6 shows present embodiment The resin enclosure of the variation of motor and the partial sectional view of cover.In motor A1 shown in Fig. 6, in addition to resin enclosure 2a1 and It covers other than 3a1 difference, there is structure identical with motor A shown in Fig. 2.Therefore, identical to substantially the same part mark Label, and omit the detailed description of same section.

In motor A1 shown in Fig. 6, the diameter of the outer peripheral surface of resin enclosure 2a1 is towards the inboard of pressing direction, i.e. Fig. 6 In the 1st direction side Op gradually become smaller.That is, the outer peripheral surface of resin enclosure 2a1 is that the inboard of pressing direction becomes the inclination of path Face (tapered surface).Moreover, cover 3a1 has the shape that can be inserted into for resin enclosure 2a1.Cover 3a1 be cylindrical in shape, diameter at least towards The inboard of the pressing direction of inner peripheral surface, the 1st direction side Op i.e. in Fig. 6 gradually become smaller.That is, the internal diameter of cover 3a1 is towards outside resin The pressing direction of shell 2a1 gradually becomes smaller.By the shape of change resin enclosure 2a1 and cover 3a1, become easy insertion.In addition, Since press-in portion 221 is inclined surface, the deflection of resin enclosure 2a1 when indentation can be reduced.It is easy to inhibit fixed as a result, Son 1 generates strain etc..

2 > of < 1.10.2 variation

Referring to attached drawing, the variation of motor shown in present embodiment is illustrated.Fig. 7 shows present embodiment The resin enclosure of other variations of motor and the partial sectional view of cover.In motor A2 shown in Fig. 7, in addition to resin enclosure Other than 2a2 is different with cover 3a2, there is structure identical with motor A shown in Fig. 2.Therefore, substantially the same part is marked Identical label, and omit the detailed description of same section.

In motor A2 shown in Fig. 7, the diameter of the outer peripheral surface of resin enclosure 2a2 is towards the inboard of pressing direction, i.e. Fig. 7 In the 1st direction side Op become smaller stage by stage.That is, the outer peripheral surface of resin enclosure 2a2 has different multiple shapes.Moreover, resin The inboard of the pressing direction of the outer peripheral surface of shell 2a2 is path, forms step in the part of profile variation.Moreover, cover 3a2 tool There is the shape that can be inserted into for resin enclosure 2a2.Cover 3a2 is cylindrical in shape, at least the inboard of the pressing direction of inner peripheral surface, i.e. in Fig. 7 The diameter of the 1st direction side Op become smaller stage by stage.That is, the pressing direction of internal diameter towards the resin enclosure 2a2 of cover 3a2 becomes stage by stage It is small.

By the shape with resin enclosure 2a2 and cover 3a2, become easy insertion.In addition, by making resin enclosure The step of 2a2 is contacted with the step of cover 3a2, is able to carry out positioning when resin enclosure 2a2 to be inserted into cover 3a2.Also, resin The press-in portion 222 of shell 2a2 is contacted with the part of the indentation of cover 3a2 and is started to press against.Thereby, it is possible to reduce to carry out because of indentation The power of effect.The deflection of resin enclosure 2a2 when indentation can be reduced.It is easy that stator 1 is inhibited to generate strain etc. as a result,.

The 2nd embodiment > of <

Referring to attached drawing, another example of motor of the invention is illustrated.Fig. 8 is point of another of motor of the invention Solve perspective view.Fig. 9 is the cross-sectional view of motor shown in Fig. 8.As shown in Figure 8 and Figure 9, the resin enclosure 2b of motor B is in the 2nd direction The side Or has the stage portion 25 extended to radial outside.There are multiple (being here 4) stage portions 25 in resin enclosure 2b.Step Portion 25 circumferentially, equally spaced arranges at position identical in the axial direction with resin enclosure 2b.Moreover, cover 3b has from periphery Face out side abutting part 311 outstanding.Resin enclosure 2b is being pressed into abutting part 311 and stage portion when cover 3b by abutting part 311 25 contacts.The face contact of the pressing direction (being the 1st direction side Op in Fig. 9) of abutting part 311 and stage portion 25.

The stage portion 25 is the protrusion of the installation for being mounted on motor B in equipment.Therefore, stage portion 25 is for screw Equal setting tools run through.Moreover, making the abutting part 311 contacted with the stage portion 25 formed by component identical with resin enclosure 2b It is formed by component identical with the intensity cover 3b higher than resin enclosure 2b.Thereby, it is possible to firmly fix motor B.In addition, i.e. Make to vibrate and impact etc. to be acted on, motor B is also not easy to fall off.In addition, the number of stage portion 25 and position be not limited to it is above-mentioned Situation is changed according to the shape of the installation position (not shown) for the device for being equipped with motor B and position etc..

Cover 3b is electrically insulated with the 1st bearing storage member 61 and the 2nd bearing storage member 62.Moreover, stator core 11 passes through Energized components 8 and grounding point (frame ground) are connected, and decline the current potential of stator core 11.Thus, it is suppressed that by stator core The generation of galvanic corrosion caused by 11 induced voltages generated.In addition, the equipment for being equipped with motor A sometimes is contacted with abutting part 311. Moreover, in the case where the part of equipment contacted with abutting part 311 is same potential with grounding point (frame ground), conducting parts Part 8 is identical voltage with grounding point (frame ground), connect with grounding point via cover 3.At this point, also can be omitted energization The grounding parts 82 of component 8.

Feature in addition to this is identical as the 1st embodiment.

The 3rd embodiment > of < 3.

Figure 10 is the cross-sectional view of the another example of motor of the invention.In motor C shown in Fig. 10, outside stator 1c and resin Shell 2c is different, but part in addition to this is identical as the motor A of the 1st embodiment.Therefore, to the structure of motor C and motor A Substantially the same part marks identical label, and omits the detailed description of same section.

As shown in Figure 10, in the stator 1c of motor C, there is insulator in the end of the 1st direction side Op of insulator 12 Core-back 122.Moreover, having in insulator core-back 122 configured with the wiring portion 120c for taking wire connecting portion 131.Moreover, In The position be overlapped in the axial direction with wiring portion 120c of resin enclosure 2c is formed with recess portion 23c.

Moreover, the part of recess portion 23c is thinner wall section 24c.Moreover, between recess portion 23c cover 3c be overlapped in the axial direction With clearance G p.

The press-in portion 22 of resin enclosure 2c is configured in outer peripheral surface.Therefore, it when cover 3c, is pressed by resin enclosure 2c indentation When power act on the outer peripheral surface of resin enclosure 2c.In motor C, by configuring recess portion 23c in the 1st axial direction side Op End, so that power when being pressed into is not easy to concentrate on recess portion 23c.Cover 3c is further suppressed as a result, relative to resin enclosure 2c's Offset.Resin enclosure 2c can become the shape for conducting the 1st bearing storage member 61 and the 2nd bearing storage member 62 as a result, State.

Feature in addition to this is identical as the 1st embodiment.

The 4th embodiment > of < 4.

Referring to attached drawing, another example of the invention is illustrated.Figure 11 is that the decomposition of the another example of motor of the invention is vertical Body figure.Figure 12 is the cross-sectional view of motor shown in Figure 11.In the motor D of present embodiment, in addition to cover, the 1st bearing incorporating section Other than part 61d, the 2nd bearing storage member 62d and the intrusion of bearing side prevent component 71d different, have and the 1st embodiment The identical structure of motor A.Therefore, in the structure of motor D, to identical as the part mark that the structure of motor A is substantially the same Label, and omit the detailed description of same section.

< 4.1 covers >

As shown in Figure 11, Figure 12, the cover of motor D has the 1st cover member 3da and the 2nd cover member 3db.That is, cover includes the 1st Cover member 3da, from axial side (the 1st direction side Op) covering resin shell 2；And the 2nd cover member 3db, from axial direction The other side (the 2nd direction side Or) covering resin shell 2.There is the 1st direction Op of resin enclosure 2 in the 1st cover member 3da indentation Side.In addition, in 2nd direction Or side of the 2nd cover member 3db inserted with resin enclosure 2.In addition, in the motor D of present embodiment In, the 1st direction Op side pressure of resin enclosure 2 enters the 1st cover member 3da, and but not limited thereto.Such as it is also possible to outside resin 2nd direction Or side pressure of shell 2 enters the 2nd cover member 3db.Alternatively, it is also possible to make both to be pressed into.According to the pressure of resin enclosure 2 Enter the position in portion 22 to determine the indentation of resin enclosure 2 in which of the 1st cover member 3da and the 2nd cover member 3db cover member.

The 1st cover member > of < 4.2

As shown in Figure 11, Figure 12, the 1st cover member 3da has bottom in what at least part of the end of the 1st direction side Op was closed Cylindrical shape.Moreover, the 1st cover member 3da has the 1st flange 32 extended to radial outside in the end of the 2nd direction side Or. That is, the 1st cover member 3da has the 1st flange 32 extended from periphery towards radial outside.As shown in figure 11, along end on observation When, the 1st flange 32 is in quadrangle (such as square).In addition, the 1st flange 32, which uses, to be equipped with the device of motor D (not Diagram) installation position installation shape.

In addition, the radial center of the bottom of the 1st cover member 3da and the 1st bearing storage member 61d are formed by the same part. That is, cover (the 1st cover member 3da) and bearing storage member (the 1st bearing storage member 61d) are formed by the same part.Moreover, the 1st Bearing storage member 61d and the intrusion of bearing side prevent component 71d from being formed by the same part.That is, the 1st cover member 3da, the 1st bearing Storage member 61d and the intrusion of bearing side prevent component 71d from being formed by the same part.That is, the 1st bearing storage member 61d is from the 1st The bottom of cover member 3da is prominent to the 1st direction side Op.Moreover, the intrusion of bearing side prevents component 71d from the 1st bearing storage member The radial center portion of the end face portion 610d of the 1st direction side Op of 61d is prominent to the 1st direction side Op.In addition, the intrusion of bearing side is anti- Stop part 71d and the 1st bearing storage member 61d is formed by the same part, i.e. metal.

1st bearing storage member 61d and the 1st cover member 3da is formed by the same part, but stores the 1st bearing 51 in inside, This point plays the role of identical with the 1st bearing storage member 61 of motor A.In addition, though the intrusion of bearing side prevents component 71d Material it is also different, but by preventing component 72 to be used in combination with the intrusion of axis side, inhibition water, dust, the foreign matters such as dust are mixed into, This point, which plays the role of invading with the bearing side of motor A, prevents component 71 identical.

Internal diameter insulating element 303 perforation bigger than the shape of the interconnecting piece 811 of energized components 8 is outer to the 1st cover member 3da's Circumferential surface.Moreover, the interconnecting piece 811 of energized components 8 runs through insulating element 303.At this point, interconnecting piece 811 and the 1st cover member 3da are non- Contact is electrically insulated.

The 2nd cover member > of < 4.3

As shown in Figure 11, Figure 12, the 2nd cover member 3db is the component of the tubular axially extended.2nd cover member 3db and 2 bearing storage member 62d are formed by the same part.In addition, the continuous landform in end in the 2nd direction side Or of the 2nd cover member 3db 2 bearing storage member 62d of Cheng You.That is, cover (the 2nd cover member 3db) and bearing storage member (the 2nd bearing storage member 62d) It is formed by the same part.In addition, the 2nd cover member 3db is convex with the 2nd extended to radial outside in the end of the 1st direction side Op Edge 33.That is, the 2nd cover member 3db has the 2nd flange 33 extended from periphery towards radial outside.As shown in figure 11, along axial direction When observation, the 2nd flange 33 is in quadrangle (such as square).2nd flange 33 has the shape be overlapped in the axial direction with the 1st flange 32 Shape.

In the 2nd bearing storage member 62d, in addition to the 2nd bearing storage member 62 of motor A is located at outer cylindrical portion 620 Part with the 2nd cover member 3db by the same part it is continuous other than, have and 62 phase of the 2nd bearing storage member used in motor A Same structure.That is, the 2nd bearing storage member 62d has the incorporating section 621d of the 2nd bearing 52 of storage.

The assembling > of 4.4 motor of <

Resin enclosure 2 is inserted in the 1st cover member 3da from the 1st direction side Op, and press-in portion 22 is pressed into the 1st cover member 3da. On the other hand, the 2nd cover member 3db only covering resin shell 2, without being pressed into.Therefore, inserted with the 2nd direction Or of resin enclosure 2 2nd cover member 3db of the part of side can be rotated centered on central axis Ax sometimes.Therefore, in the 2nd flange 33 The end face in the 1st direction side Op has to the 1st direction side Op outstanding raised 330.Protrusion 330 is inserted in location hole 320, this is fixed Position hole 320 is set to the 1st flange 32.The 1st flange 32 and the 2nd flange 33, i.e. the 1st cover member 3da and the 2nd cover portion are adjusted as a result, The circumferential position of part 3db.

1st cover member 3da and the 2nd cover member 3db is fixed to each other by the 1st flange 32 and the 2nd flange 33.Therefore, convex the 1st Edge 32 and the 2nd flange 33 have for setting tool (being here screw) perforative screw fixed hole.Moreover, by by the 1st flange 32 and the 2nd flange 33 is fixed to each other, and the 1st cover member 3da and the 2nd cover member 3db is made to be fixed to each other.That is, in the 1st cover member 3da When with the 2nd cover member 3db covering resin shell 2, the 1st flange 32 and 33 direct or indirect connection of the 2nd flange.

The indentation of resin enclosure 2 is fixed on the 1st cover member via the 2nd flange 33 in the 1st cover member 3da, the 2nd cover member 3db The 1st flange 32 of 3da.Therefore, the opposite of stator 1 that resin enclosure 2 is covered and the 1st bearing 51 and the 2nd bearing 52 is determined Position.Moreover, rotary shaft 40 is that can rotate by the 1st bearing 51 and the bearing of the 2nd bearing 52.

That is, being supported by the 1st bearing 51 and the 2nd bearing 52 to rotary shaft 40 in motor D, 51 He of the 1st bearing 2nd bearing 52 is installed on the 1st cover member 3da and the 2nd cover member 3db that indentation has resin enclosure 2.Rotor 4 is in stator as a result, 1 radially inside has certain interval, and is supported to rotate.

In this way, by the 1st cover member 3da and the 2nd cover member 3db covering resin shell 2, so as to shorten press-in portion 22 The length of indentation.Thereby, it is possible to reduce act on resin enclosure 2 and cover power, thus inhibit resin enclosure 2 and cover strain, The deformation such as offset.Also, thereby, it is possible to align stator 1 accurately with rotor 4, it is able to suppress the reduced performance of motor D.

In addition, the 1st bearing storage member 61d is formed with the 1st conductive cover member 3da by the same part, the 2nd axis Storage member 62d and the 2nd conductive cover member 3db is held to be formed by the same part.Moreover, the 1st cover member 3da and the 2nd Cover member 3db contact.The 1st bearing storage member 61d and the 2nd bearing storage member 62d are in electric conducting state as a result,.In addition, Alternatively the 1st cover member 3da is a part of the 1st bearing storage member 61d, alternatively, it is also possible to say that the 2nd cover member 3db is A part of 2nd bearing storage member 62d.Moreover, the 1st cover member 3da is directly contacted with the 2nd cover member 3db in motor D.

In motor D, the 1st cover member 3da is directly contacted with the 2nd cover member 3db.Moreover, the 1st cover member 3da and energization Component 8 is electrically insulated.The 2nd cover member 3db is electrically insulated with energized components 8 as a result,.(the 1st cover member 3da and the 2nd cover portion are covered as a result, Part 3db) it is electrically insulated with energized components 8.

In the present embodiment, insulating element 303 runs through the energized components 8 of the 1st cover member 3da.But it is not limited to This.Or at least the 1st cover member 3da is that by insulating ceramics etc. there is the material of insulating properties to be formed.Structure in this way At, it is not necessary to there is insulating element 303, and the 1st bearing 51 and the 2nd bearing 52 can be made to be electrically insulated with energized components 8.Press down as a result, The outer ring of the outer ring and the 2nd bearing 52 of having made the 1st bearing 51 is connect with grounding point (frame ground).That is, being also possible to cover has Insulating properties.

4.5 variation > of <

Referring to attached drawing, the variation of motor shown in present embodiment is illustrated.Figure 13 is the horse of present embodiment The cross-sectional view of the variation reached.In the motor D1 shown in Figure 13, in addition to the 1st cover member 3da1 and the 2nd cover member 3db1 are different In addition, there is structure identical with motor D shown in Figure 11, Figure 12.Therefore, identical mark is marked to substantially the same part Number, and omit the detailed description of same section.

In the motor D1 shown in Figure 13, resin enclosure 2 and the 1st bearing storage member 61 are used and the 1st embodiment The identical structure of motor A.That is, the 1st bearing storage member 61 is configured at the resin enclosure hole 20 of resin enclosure 2, flange part 611 is embedding Part takes shape in resin enclosure 2.Moreover, the 1st cover member 3da1 has cage apertures 30, shell contact portion in the end of the 1st direction side Op The shrinkage pool 21 of 31 pressing resin enclosures 2.That is, the 1st cover member 3da1 and the 1st bearing storage member 61 are formed by different components. Moreover, the 1st bearing storage member 61 runs through cage apertures 30.At this point, between the inner peripheral portion and the 1st bearing storage member 61 of cage apertures 30 It is formed with gap.The 1st cover member 3da1 is electrically insulated with the 1st bearing 51 as a result,.

As shown in figure 13, motor D1 is seperated with the 2nd cover member 3db1 and the 2nd bearing storage member 62.That is, the 2nd In cover member 3db1, the end of the 1st direction side Op of outer cylinder 620 of the end far from the 2nd bearing storage member 62 of the 2nd direction side Or Portion.The 2nd cover member 3db1 is electrically insulated with the 2nd bearing storage member 62 as a result,.

Moreover, being made by contacting the 1st flange 32 of the 1st cover member 3da1 with the 2nd flange 33 of the 2nd cover member 3db1 1st cover member 3da1 and the 2nd cover member 3db1 is conducted.On the other hand, the 1st cover member 3da1 supports energized components 8. 1st cover member 3da1 and the 1st bearing storage member 61 insulate, and the 2nd cover member 3db1 and the 2nd bearing storage member 62 insulate.Cause This, supports energized components 8 by the 1st cover member 3da1, makes stator core 11 and grounding point (frame via energized components 8 Ground connection) connection.At this point, be able to suppress the outer ring of the 1st bearing 51 and the outer ring of the 2nd bearing 52 becomes with grounding point (frame ground) Same potential.Inhibit the 1st bearing 51 generated due to the voltage because inducing in stator core 11 and the 2nd bearing 52 as a result, Galvanic corrosion.

The 5th embodiment > of < 5.

Another example of the invention is illustrated referring to attached drawing.Figure 14 is the cross-sectional view of the another example of motor of the invention. In the motor E of present embodiment, other than resin enclosure 2e, the 1st cover member 3ea and the 2nd cover member 3eb are different, tool There is structure identical with the motor D of the 4th embodiment.Therefore, in the structure of motor E, to the substantial phase of the structure of motor D Same part marks identical label, and omits the detailed description of same section.In addition, the 1st bearing 51 is received in motor E It is contained in and the isostructural 1st bearing storage member 61 of motor A phase.

As shown in figure 14, the resin enclosure 2e of motor E has stage portion 25e, and stage portion 25e is from the indentation than outer peripheral surface Portion 22 is prominent to radial outside close to the part of the 2nd direction Or.In addition, shown in the axial position and Fig. 8, Fig. 9 of stage portion 25e Motor B possessed by stage portion 25 it is different, but there is same shape and with same purpose.That is, in resin enclosure 2e It is circumferentially, equally spaced arranged with 4 stage portion 25e, this 4 stage portion 25e.In addition, in the 1st direction of resin enclosure 2e The end of the side Op is fixed with the 1st bearing storage member 61.In addition, the tree of the fixing means of the 1st bearing storage member 61 and motor A Rouge shell 2 is identical, detailed description will be omitted.

1st cover member 3ea has bottom cylindrical shape in what the end of the 1st direction side Op was closed.Moreover, in the same manner as cover 3, In Bottom has cage apertures 30 and shell contact portion 31.In addition, the 1st cover member 3ea have the 1st flange 32, the 1st flange 32 have with The identical structure of 1st cover member 3da.It is pressed into when the 1st cover member 3ea by resin enclosure 2e, the 1st bearing storage member 61 passes through Wear cage apertures 30.At this point, the 1st bearing storage member 61 and the 1st cover member 3ea be it is non-contacting, be electrically insulated.

2nd cover member 3eb is the component of the tubular axially extended.2nd cover member 3eb and the 2nd bearing storage member 62 It is formed by different components.The end of the 2nd direction side Or of 2nd cover member 3eb and the outer cylinder 620 of the 2nd bearing storage member 62 The end of the 1st direction side Op separate in the axial direction.The 2nd cover member 3eb is electrically insulated with the 2nd bearing storage member 62 as a result,.

In addition, the 2nd cover member 3eb the end of the 1st direction side Op have the 2nd flange 33e that extends to radial outside with Abutting part 35e.2nd flange 33e, which is set to, makes the 2nd cover member 3eb cover Shi Yu from the 2nd direction side Or of resin enclosure 2e The position of the 1st flange 32 contact of 1 cover member 3ea.In addition, abutting part 35e be set to make the 2nd cover member 3eb outside resin The position contacted when the 2nd direction side the Or covering of shell 2e with the end face of the 2nd direction side Or of stage portion 25e.

As shown in figure 14, in the 2nd cover member 3eb, the 2nd flange 33e configuration is leaning on the 1st direction side Op than abutting part 35e Position.Moreover, the 2nd flange 33e and the circumferentially alternating configuration of abutting part 35e.

It is pressed into when the 1st cover member 3da by resin enclosure 2, the 1st direction side Op of the 1st flange 32 and stage portion 25e End face contact.Moreover, the 2nd direction side Or of the 2nd cover member 3eb covering resin shell 2e.At this point, the abutting of the 2nd cover member 3eb Portion 35e is contacted with the end face of the 2nd direction side Or of the stage portion 25e of resin enclosure 2e, and the 2nd flange 33e connects with the 1st flange 32 Touching.

In this way, there is stage portion 25e by resin enclosure 2e, become axial positioning when being pressed into the 1st cover member 3ea It must be easy.Similarly, the 2nd cover member 3eb is become easy relative to the axial positioning of resin enclosure 2e.In addition, the 1st cover portion Part 3ea is electrically insulated with the 1st bearing storage member 61.Moreover, the 2nd cover member 3eb is electrically insulated with the 2nd bearing storage member 62.By This, even if the feelings for connecting stator core 11 with grounding point (frame ground) in the conductive member 8 that the 1st cover member 3ea is supported Under condition, the 1st bearing storage member 61 and the 2nd bearing storage member 62 are not also connect with grounding point (frame ground).Inhibit as a result, 1st bearing 51 and the 2nd bearing 52 are connect with grounding point (frame ground), it is suppressed that the electricity that generates by the deviation of reference voltage Erosion.In addition, as described above, voltage about stator core 11, by being connect with grounding point (frame ground), make voltage drop down to Reference voltage.Thus, it is suppressed that the galvanic corrosion generated according to the induced voltage generated by stator core 11.

More than, embodiments of the present invention are illustrated, but as long as in the range of the purport of the present invention, then implementing Mode can carry out various modifications.

Industrial availability

The present invention can come as the motor of driving air-conditioning, the Air Blast fans such as electric fan using.

Label declaration

A: motor；A1: motor；A2: motor；B: motor；C: motor；D: motor；D1: motor；E: motor；1: stator；11: Stator core；110: threaded hole；111: core-back；112: teeth portion；12: insulator；120: wiring portion；121: insulator tooth Portion；122: insulator core-back；13: winding；130: taking wire connecting portion；2: resin enclosure；20: resin enclosure hole；200: groove； 201: slot；2011: slot；2012: slot；0202: hole；21: shrinkage pool；211: the 1 openings；212: the 2 openings；22: press-in portion；23: Recess portion；231: protruding portion；24: thinner wall section；25: stage portion；25e: stage portion；3: cover；3b: cover；3c: cover；3da: the 1 cover portion Part；3db: the 2 cover member；3ea: the 1 cover member；3eb: the 2 cover member；30: cage apertures；31: shell contact portion；310: perforation Portion；311: abutting part；41: inner cylinder；32: the 1 flanges；33: the 2 flanges；33e: the 2 flange；4: rotor；40: rotary shaft；411: Barrel shape component；412: shaft supporting part；400: slot；401: shaft retaining ring；402: shaft retaining ring；42: magnet；43: molding section；51: 1st bearing；52: the 2 bearings；61: the 1 bearing storage members；610: end face；611: bearing flange；62: the 2 bearing incorporating sections Part；620: outer cylindrical portion；621: incorporating section；71: the intrusion of bearing side prevents component；72: the intrusion of axis side prevents component；8: conducting parts Part；81: contact portion；811: interconnecting piece；812: overhead；813: planar portions；82: grounding parts；Bd: substrate；Is: screening glass.

Claims (11)

1. a kind of motor, includes

Rotor has the rotary shaft extended along central axis；

Stator, has multiple windings across insulator on stator core, the stator core radially with it is described The outer peripheral surface of rotor is opposed；

Resin enclosure seals at least described insulator and the winding of the stator；

Multiple bearings, the rotation is being pivotally supported along the position that axial direction is separated from each other can to rotate by they；

Cover, covers the outer peripheral surface of the resin enclosure；And

Energized components, it is conductive,

The stator has the multiple bearing storage members stored respectively to the multiple bearing,

The energized components are supported by the cover,

The energized components have the contact portion contacted with the stator core in side, have the ground connection of ground connection in the other side Portion,

The bearing is electrically insulated with the energized components.

2. motor according to claim 1, wherein

The cover is electrically insulated with the bearing storage member.

3. motor according to claim 1 or 2, wherein

The cover has insulating properties.

4. according to claim 1 to motor described in any one in 3, wherein

The cover is electrically insulated with the energized components.

5. motor according to claim 4, wherein

The cover and the bearing storage member are formed by the same part.

6. according to claim 1 to motor described in any one in 5, wherein

The energized components include

Interconnecting piece；And

Overhead is set to the end of the side of the interconnecting piece,

The interconnecting piece and the overhead are formed by the same part,

The face of the interconnecting piece side of the overhead has planar portions, which is plane,

The end of the other side of the interconnecting piece is contacted with the stator core,

The outer surface of the cover is contacted with the planar portions of the overhead.

7. according to claim 1 to motor described in any one in 6, wherein

The cover is in the tubular axially extended,

The resin enclosure has the press-in portion for the inside for being pressed into the cover.

8. motor according to claim 7, wherein

When radially observing the resin enclosure, the press-in portion is Chong Die with the stator core.

9. motor according to claim 7 or 8, wherein

The pressing direction of the internal diameter of the cover towards the resin enclosure gradually becomes smaller.

10. motor according to claim 7 or 8, wherein

The internal diameter of the cover towards the resin enclosure pressing direction and become smaller stage by stage.

11. according to claim 1 to motor described in any one in 10, wherein

The cover includes

1st cover member covers the resin enclosure from axial side；And

2nd cover member covers the resin enclosure from the axial other side,

1st cover member has the 1st flange extended from periphery towards radial outside,

2nd cover member has the 2nd flange extended from periphery towards radial outside,

1st cover member and the 2nd cover member make the 1st flange and the described 2nd convex when covering the resin enclosure Edge direct or indirect connection.