CN109274196A - Motor - Google Patents

Abstract

The present invention provides motor.Annular wall has the 1st seam for penetrating through the face in the radially inner side of the annular wall and outside.It is provided in at least one party in the upper surface of shell and the lower surface of cover along axial depression and along the groove portion extended comprising the direction including radial ingredient.Groove portion includes external-open oral area, in outside of the radial outside towards the motor；And inner opening portion, it is open in radially inner side.Inner opening portion is located at identical radial position or is located at radially inner side compared with the inner peripheral surface of the cover.1st seam is configured at the position separated in the circumferential with the inner opening portion.

Description

Motor

Technical field

The present invention relates to motors.

Technical field

For example, disclosing the motor for improving waterproofness in Japanese Kokai Japanese Laid-Open Patent Publication 8-172744 bulletin.? Be installed on the inside of the bracket of stator and be formed with: substantially a ring-shaped bearing cage keeps bearing, which is used for The rotary shaft for penetrating through the bracket is pivotally supported；First cyclic rib, axially protrudes on the outside；And second cyclic rib, Its inside for being located at the first cyclic rib.Moreover, being equipped in the rotary shaft: substantially disk-shaped water cutting plate is disposed in The top of second cyclic rib, at center for rotary shaft through insertion；And the waterproof cover of substantially bottomed tube, it is located at water cutting plate Outside, there is the through hole and chimeric with the periphery of first cyclic rib for rotary shaft perforation at center.Institute It states and is formed with rhone on the inside of the canister portion of waterproof cover, be formed with discharge outlet in the lower end of the rhone.Moreover, described first The position corresponding with the discharge outlet of cyclic rib forms seamed.

In the motor disclosed in Japanese Kokai Japanese Laid-Open Patent Publication 8-172744 bulletin, waterproof cover needs to configure to make Obtain position and the aligned in position for the seam for being set to the first cyclic rib of rhone and discharge outlet.The contraposition may need the time.This Outside, in the motor disclosed in Japanese Kokai Japanese Laid-Open Patent Publication 8-172744 bulletin, for example, when rotary shaft according to vertical When the parallel direction in direction configures, water may accumulate in off-seam remote position.

Summary of the invention

The object of the present invention is to provide water can be made to be difficult to enter inside, and the motor that water is discharged to the outside.

The motor of one embodiment of illustration of the invention includes stationary part, with shell；Rotating part, with edge The central axis that up and down direction extends pivots about；And bearing portion, being by rotating part bearing can be opposite It is rotated in the stationary part.Stationary part includes annular wall, is configured at the upper surface of shell and than bearing portion by radial outside Position；And cover, it is fixed on the upper surface of shell, covers annular wall and bearing portion.Annular wall has the annular wall 1st seam of the face in radially inner side and outside perforation.At least one party in the upper surface of shell and the lower surface of cover is provided with edge Axial depression and along comprising including radial ingredient direction extend groove portion.Groove portion includes external-open oral area, outside in diameter Side is to the outside of the motor；And inner opening portion, it is open in radially inner side.Inner opening portion is compared with the inner peripheral surface of cover, position In identical radial position or it is located at radially inner side.1st seam is configured at the position separated in the circumferential with inner opening portion.

The present invention of illustration, which provides, can make water be difficult to enter inside, and the motor that water is discharged to the outside.

There is the detailed description of the preferred embodiment for the present invention below, referring to attached drawing, can be more clearly understood that the present invention Above-mentioned and other feature, element, step, features and advantages.

Detailed description of the invention

Fig. 1 is the perspective view of the motor of embodiments of the present invention.

Fig. 2 is the figure for showing the outline structure of motor of embodiments of the present invention.

Fig. 3 is the figure after removing the cover of motor shown in FIG. 1.

Fig. 4 is the top view that will cover the motor after removing.

Fig. 5 is the figure for enlargedly showing a part of Fig. 4.

Fig. 6 is the top view for showing the 1st variation of motor of embodiments of the present invention.

Fig. 7 is the outline enlarged drawing of the cover for showing the motor of the 1st variation and the relationship of cover.

Fig. 8 is the schematic sectional view of the position B-B of Fig. 7.

Fig. 9 is the top view for showing the 2nd variation of motor of embodiments of the present invention.

Figure 10 is the side view of the motor of the 2nd variation shown in Fig. 9.

Specific embodiment

Hereinafter, embodiment illustrated of the invention is described in detail referring to attached drawing.It in the present specification, will be with horse The direction parallel up to 1 central axis A is known as " axial direction ", and the direction vertical with the central axis A of motor 1 is known as " radial direction ", It will be known as " circumferential direction " along the direction of the circular arc centered on the central axis A of motor 1.It, will be according in addition, in the present specification The direction definition that the central axis A of the motor 1 of direction configuration shown in Fig. 2 extends is up and down direction.But up and down direction is only In order to illustrate and the title that uses, do not limit actual positional relationship and direction.

Firstly, being illustrated to the outline structure of the motor of embodiment illustrated of the invention.Fig. 1 is reality of the invention Apply the perspective view of the motor 1 of mode.Fig. 2 is the figure for showing the outline structure of motor 1 of embodiments of the present invention.In Fig. 2, Left-half is cross-sectional view, and right half part is side view.As depicted in figs. 1 and 2, motor 1 have stationary part 2, rotating part 3 and Bearing portion 4.

Stationary part 2 has shell 20, cover 21 and stator 22.In the present embodiment, shell 20 and cover 21 are by made of metal At.But at least one party in shell 20 and cover 21 can be made of the material other than metal, such as can be made by resin etc. At.

Shell 20 has housing body portion 201, cover 202 and bracket 203.Housing body portion 201 has on top to be opened Mouthful.Specifically, housing body portion 201 is cylindrical in shape.That is, in the present embodiment, housing body portion 201 also has out in lower part Mouthful.The inner peripheral surface of housing body portion 201 circular in shape when from axial overlook view.Stator 22 is incorporated in housing body portion In 201.

The top of 202 covering shell main part 201 of cover.Specifically, 202 covering shell main part 201 of cover is upper Portion's opening.Cover 202 is circular plate shape.Cover 202 has the hole passed through for aftermentioned axis 31 in central portion.Fig. 3 as be described hereinafter Shown, cover 202 has in periphery towards radial outside lid fixed part 202a outstanding.Lid fixed part 202a has for fixed part The hole that part 5 is installed.In the present embodiment, fixation member 5 is screw.Screw 5, which is fixed in, is arranged in housing body portion 201 In threaded hole (not shown) on upper surface.By the way that fixation member 5 is installed on lid fixed part 202a, and cover 202 is fixed In housing body portion 201.In addition, fixation member 5 is not limited to screw, such as can be rivet etc..

Bracket 203 is installed in the lower part of housing body portion 201.It opens the lower part of 203 covering shell main part 201 of bracket Mouthful.Bracket 203 is in circular plate shape.203 fixed part 5 of bracket is fixed on housing body portion 201.In the present embodiment, Gu Determining component 5 is screw but it is also possible to be other components such as rivet.In addition, a side in cover 202 and bracket 203 can be with Housing body portion 201 is single part.

Cover 21 is fixed in the upper surface of shell 20.Specifically, cover 21 is fixed in the upper surface of cover 202.Cover 21 With cover main body portion 210 and flange part 211.Flange part 202 is prominent from the lower end in cover main body portion 210 to radial outside, and with lid The upper surface in portion 20 contacts.

In the present embodiment, cover main body portion 210 is in have bottom cylindrical shape.Cover main body portion 210 has hole portion in center 210a.Aftermentioned axis 31 passes through hole portion 210a.Flange part 211 is annular in shape.When from axial overlook view, flange part 211 Periphery is Chong Die with the periphery of cover 202.Flange part 211 has flange fixed part 211a in its periphery.Flange fixed part 211a from The periphery of flange part 211 is prominent towards radial outside.Flange fixed part 211a has the hole installed for fixation member 5.Passing through will Fixation member 5 is installed on flange fixed part 211a, and cover 21 is fixed on shell 20.

In addition, in the present embodiment, 21 fixed parts 5 of cover are fixed on shell 20, and the fixation member 5 is by cover 202 It is fixed on housing body portion 201.Specifically, when from axial overlook view, the hole of flange fixed part 211a and lid fixed part The hole of 202a is Chong Die with the threaded hole (not shown) of housing body portion 201 is set to.Fixation member 5 passes through flange fixed part 211a Hole and lid fixed part 202a hole both sides and be fixed on housing body portion 201.Cover 202 is fixed in shell master as a result, Body portion 201.Cover 21 is fixed in shell 20.

According to this structure, shared fixation member 5 is able to use to carry out cover 202 relative to housing body portion 201 Fixation fixed and that cover 21 is relative to shell 20, thereby, it is possible to reduce the component count of motor 1.But it is also possible to using different Fixation member carries out cover 202 relative to 21 fixation relative to shell 20 of the fixation of housing body portion 201 and cover.Fixed part Part is not limited to screw, is also possible to other components such as rivet.

Stator 22 is the armature of motor 1.Stator 22 is annular in shape.The center of stator 22 and the central axis A mono- of motor 1 It causes.As shown in Fig. 2, stator 22 has stator core 221, coil 222 and insulating part 223.

Stator core 221 is e.g. by magnetic steel plate along axially stacked and composition.Specifically, stator core 221 has There is circular core-back 221a and from core-back 221a to radially inner side multiple tooth 221b outstanding.In addition, stator Iron core 221 for example can be by the iron core piece with core-back and tooth be circumferentially bonded to it is multiple and constitute.

Coil 222 is constituted and being wound in conducting wire on each tooth 221b across insulating part 223.Coil 222 is along week To configured with multiple.

Insulating part 223 is the resin component for the insulating properties for making stator core 221 be electrically insulated with coil 222.Insulating part 223 covers At least part of lid stator core 221.Insulating part 223 for example can become single with stator core 221 by insert-molding One component.In addition, insulating part 223 can be seperated component with stator core 221.In this case, insulating part 223 for example can be with By being constituted from 2 components of upper and lower cladding stator core 221.

Rotating part 3 is pivoted about with the central axis A vertically extended.Rotating part 3 has axis 31, rotor 32 and inner cover 33.Rotating part 3 is located at the radially inner side of stator 22.

Axis 31 axially extends, positioned at the radially inner side of bearing portion 4.In the present embodiment, axis 31 is columned gold Belong to component.A part of axis 31 protrudes upwards from the upper surface of shell 20, and a part of the part outstanding passes through hole portion 210a and it is further prominent to the upside of cover 21.Fan or tooth are for example installed in the external part that is projected into of the top of axis 31 Wheel etc..But axis 31 can be using such as flowering structure: other than protruding from the upper surface of shell 20, a part of the axis 31 is also It is protruded downwards from the following table of shell 20.In such a case it is possible to the lower face side of shell 20 be arranged above-mentioned cover 21, after Annular wall 23, outside annular wall 25 and the inner cover 33 stated.

Rotor 32 configures the radial outside in axis 31.Rotor 32 is accommodated in the inside of housing body portion 201, is located at stator 22 Radially inner side.Specifically, rotor 32 has rotor core 321 and magnet part 322.

Cylindric rotor core 321 is e.g. by magnetic steel plate along axially stacked and composition.But rotor core 321 for example can be and to cylindric or columned magnetic material implement processing and be formed.Axis 31 is pressed into rotor iron The center of core 321.Rotor core 321 rotates together with axis 31.

In the present embodiment, 322 fixed configurations of magnet part are in the radial outside of rotor core 321.Magnet part 322 is constituted Are as follows: the pole N arranges in the circumferential with the pole S.Magnet part 322 can be for example made of the multiple permanent magnets arranged in the circumferential, It can be made of 1 cylindric permanent magnet.

Inner cover 33 is configured at the upper surface side of shell 20.Specifically, inner cover 33 is configured at the upside of cover 202.Inner cover The covering of 33 quilt covers 21.In the present embodiment, inner cover 33 is fixed on the upwardly projecting part of slave cover 202 of axis 31.Inner cover 33 are located between cover 202 and cover 21.Inner cover 33 rotates together with axis 31.Inner cover 33 prevents water or dust from entering the interior of motor 1 Portion.

Specifically, inner cover 33 is in the cup-shaped in lower section side opening.Central portion of the inner cover 33 in upper surface has for axis 31 holes passed through.Inner cover 33 is preferably made of the flexible component such as synthetic rubber or natural rubber.A part of inner cover 33 It carries out flexible deformation and is embedded in the slot 31a being arranged on axis 31, so that inner cover 33 is fixed in axis 31.Slot 31a relative to The surface of axis 31 is recessed to radially inner side.The traveling quilt of the water of the inside of motor 1 is immersed by axis 31 from the upside of axis 31 Inner cover 33 interferes.Therefore, it is able to suppress water and reaches bearing portion 4 along axis 31 from the outside of motor 1.

Bearing portion 4 can rotate the bearing of rotating part 3 relative to stationary part 2.The diameter that bearing portion 4 is located at axis 31 is outside Side, part of it are fixed in axis 31.In the present embodiment, bearing portion 4 has the 1st bearing 41 and the 2nd bearing 42.1st axis Holding the 41 and the 2nd bearing 42 is ball bearing.But they are also possible to the other kinds of bearing such as sleeve bearing.

1st bearing 41 is kept by the 1st maintaining part 43, and the lower face side of cover 202 is arranged in the 1st maintaining part 43.1st protects Holding portion 43 is the cylindrical portion extended downward from the lower surface of cover 202.In the present embodiment, cover 202 and the 1st maintaining part 43 be single part.2nd bearing 42 is kept by the 2nd maintaining part 44, and the upper surface side of bracket 203 is arranged in the 2nd maintaining part 44. 2nd maintaining part 44 is the cylindrical portion extended upwards from the upper surface of bracket 203.In the present embodiment, bracket 203 and the 2nd Maintaining part 44 is single part.

In motor 1, by providing electric current to coil 222, and radial magnetic flux is generated in tooth 221b.Pass through the magnetic flux The magnetic field of formation is acted on the magnetic field formed by magnet part 322, and generates torque in the circumferential of rotor 32.Pass through the torsion Square and rotate rotating part 3 centered on central axis A.When stopping providing electric current to coil 222, the rotation of rotating part 3 stops Only.

Fig. 3 is the figure after removing the cover 21 of motor 1 shown in FIG. 1.Fig. 4 be will cover 21 remove after motor 1 vertical view Figure.In addition, Fig. 4 is the figure of the motor 1 from axial upside.

As shown in Fig. 2, Fig. 3 and Fig. 4, there is stationary part 2 configuration to lean on diameter in the upper surface of shell 20 and than bearing portion 4 Annular wall 23 outward.Specifically, annular wall 23 is set to the upper surface of cover 202.Annular wall 23 is upper from cover 202 Surface protrudes upwards.Annular wall 23 is annular in shape.But annular wall 23 can also be in other shapes such as oval ring-type.Ring Shape wall 23 and cover 202 are single parts.But annular wall 23 is also possible to seperated component with cover 202.

As shown in Fig. 2, 21 covering annular wall 23 of cover and bearing portion 4.In the present embodiment, inner cover 33 is configured at annular wall 23 radially inner side.Inner cover 33 covers at least part of the upper surface of bearing portion 4.In other words, 21 covering inner cover 33 of cover.At this In embodiment, bearing portion 4 is also covered by inner cover 33 other than quilt cover 21 covers, and thereby, it is possible to inhibit water or foreign matter to adhere to In bearing portion 4.In addition, 33 quilt cover 21 of inner cover covers, thereby, it is possible to prevent inner cover 33 from deforming due to hydraulic pressure etc..

As shown in figure 4, annular wall 23 has the 1st seam 230 for penetrating through the face in the radially inner side of the annular wall 23 and outside. Specifically, the 1st seam 230 radially penetrates through the face in the radially inner side of annular wall 23 and outside.In the present embodiment, the 1st Seam 230 is the slot of upper opening, but also can replace slot but hole.The quantity of 1st seam 230 can be individually, but preferably more It is a.In the present embodiment, the quantity of the 1st seam 230 is 5, but the quantity can change.It is multiple 1 seam 230 in the circumferential every Open compartment of terrain configuration.In the present embodiment, multiple 1st seams 230 equally spaced configure in the circumferential.

Fig. 5 is the figure for enlargedly showing a part of Fig. 4.As shown in figure 5, the 1st seam 230 has circumferential width from diameter Inwardly towards the 1st tapering 2301 to narrow outward.According to this structure, can make to be easy by the water or foreign matter of the 1st seam 230 Ground passes through from inside towards outside, and is not easy to pass through from outside towards inside.

Specifically, the 1st tapering 2301 is the inclined surface relative to radial skew.It 1st tapering 2301 can be from annular wall 23 inner peripheral surface extends to outer peripheral surface, but can also set in the range of a part from the inner peripheral surface of annular wall 23 to outer peripheral surface It sets.In the present embodiment, opposed in the circumferential the 2 face both sides for constituting the 1st seam 230 have the 1st tapering 2301.But This is to illustrate.Being also possible to constitute the only either side in opposed in the circumferential 2 face of the 1st seam 230 has the 1st tapering 2301.In addition, in the present embodiment, the structure using multiple 1st seams 230 all with the 1st tapering 2301, but can also adopt There is the structure in the 1st tapering 2301 with a part in multiple 1st seams 230.In addition it is also possible to using in multiple 1st seams 230 Any 1st seam 230 does not all have the structure in the 1st tapering 2301.

Shell 20 upper surface and cover 21 lower surface at least one party be provided with along axial depression and along The groove portion 24 upwardly extended comprising the side including radial ingredient.As shown in Fig. 3, Fig. 4 and Fig. 5, in the present embodiment, groove portion 24 are set to the upper surface of shell 20.Specifically, groove portion 24 is set to the upper surface of cover 202.Groove portion 24 is from cover 202 Upper surface is recessed downwards.Groove portion 24 radially extends.Even if it is to be with central axis A that motor 1, which is according to direction of rotation, as a result, Center it is clockwise and counterclockwise in any direction by use in the case where, also can be efficient by groove portion 24 Water is discharged in ground.But groove portion 24 can extend along the direction relative to radial skew.

The quantity of groove portion 24 can be individually, but preferably several.In the present embodiment, the quantity of groove portion 24 is 5, But the quantity can change.Multiple groove portions 24 configure at spaced intervals in the circumferential.In the present embodiment, multiple groove portions 24 exist It is equally spaced configured in circumferential direction.

Groove portion 24 has the external-open oral area 241 of the outside towards the motor 1 in radial outside.In the present embodiment, outside Opening portion 241 is located at the end of the radial outside of shell 20.Specifically, groove portion 24 extends to the periphery of cover 202.Outward opening Portion 241 is open in radial outside.According to this structure, water can be transported to the end of the radial outside of shell 20 by groove portion 24 Therefore water can be smoothly discharged out the outside of motor 1 by portion.

Groove portion 24 has in the inner opening portion 242 that radially inner side is open.Inner opening portion 242 compared with the inner peripheral surface of cover 21, Positioned at identical radial position or it is located at radially inner side.In the present embodiment, inner opening portion 242 is located at the inner circumferential of cover 21 The radially inner side in face.

In the present embodiment, such as shown in Figures 2 and 3, the upper surface of shell 20 is provided with outside annular wall 25, The outside annular wall 25 is configured at the radial outside of annular wall 23 and leans on the position of radially inner side than the inner peripheral surface of cover 21.In detail For, outside annular wall 25 is set to the upper surface of cover 202.Outside annular wall 25 is dashed forward upwards from the upper surface of cover 202 Out.21 covering annular wall 23 of cover and outside annular wall 25.In the present embodiment, the edge of outside annular wall 25 and cover main body portion 21 The inner circumferential face contact of axially extending side wall.It may also be outside annular wall 25 and cover main body portion 21 axially extend The inner peripheral surface of side wall separates radially.

Outside annular wall 25 has the 2nd seam 250 for penetrating through the face in the radially inner side of the outside annular wall 25 and outside.In detail For thin, the 2nd seam 250 radially penetrates through the face in the radially inner side of outside annular wall 25 and outside.In the present embodiment, 2 seams 250 are the slot of upper opening, but also can replace slot and use hole.The quantity of 2nd seam 250 can be individually, but preferably It is multiple.In the present embodiment, the quantity of the 2nd seam 250 is 5, but the quantity can change.Multiple 2nd seams 250 are in the circumferential It configures at spaced intervals.In the present embodiment, multiple 2nd seams 250 equally spaced configure in the circumferential.

As shown in figure 5, the 2nd seam 250 have circumferential width from radially inner side towards outside the 2nd tapering that narrows 2501.According to this structure, can make easily to pass through from inside towards outside by the water or foreign matter of the 2nd seam 250, and do not allow Easily pass through from outside towards inside.

Specifically, the 2nd tapering 2501 is the inclined surface relative to radial skew.1st tapering 2301 and the 2nd tapering 2501 May be the same or different relative to radial tilt angle.It 2nd tapering 2501 can be from the inner circumferential of outside annular wall 25 Face extends to outer peripheral surface, but can also be arranged in the range of a part from the inner peripheral surface of outside annular wall 25 to outer peripheral surface. In the present embodiment, opposed in the circumferential the 2 face both sides for constituting the 2nd seam 250 have the 2nd tapering 2501.But this is It illustrates.Being also possible to constitute the only either side in opposed in the circumferential 2 face of the 2nd seam 250 has the 2nd tapering 2501. In addition, in the present embodiment, the structure using multiple 2nd seams 250 all with the 2nd tapering 2501, but can also use more A part in a 2nd seam 250 has the structure in the 2nd tapering 2501.In addition it is also possible to using any in multiple 2nd seams 250 2nd seam 230 does not all have the structure in the 1st tapering 2501.

2nd seam 250 is connected with inner opening portion 242.Multiple 2nd seams 250 are connected with each inner opening portion 242 respectively.That is, the The quantity of 2 seams 250 is identical as the quantity in inner opening portion 242.It is discharged from the radially inner side of outside annular wall 25 via the 2nd seam 250 The outside of motor 1 is discharged to by groove portion 24 to the water of radial outside.

1st seam 230 is configured at the position separated in the circumferential with inner opening portion 242.In other words, the 230 and the 2nd seam of the 1st seam 250 are configured at position separated in the circumferential.In addition, the 1st seam 230 and the 2nd seam 250 be not be overlapped radially.

In the present embodiment, water or foreign matter can be prevented to be attached to bearing portion 4 by cover 21.In cover 21 can also be protected Cover 33.In addition, in the present embodiment, the water energy for entering the inside of cover 21 is enough discharged to the outside by groove portion 24.In detail For, prevent the water for entering the inside of cover 21 to reach bearing portion 4 by inner cover 33.The water of the radial outside of inner cover 33 via The 230 or the 2nd seam 250 of 1st seam is directed to radial outside, and is discharged to the outside by groove portion 24.

In addition, in the present embodiment, the 1st seam 230 and groove portion 24 are respectively in the circumferential at spaced intervals configured with multiple. Due to being configured with multiple groove portions 24, the 2nd seam 250 being connected with inner opening portion 242 is also configured with multiple.In this configuration, Water can be discharged to the outside of motor 1 from many places, thereby, it is possible to inhibit water to accumulate in the inside of motor 1.

On the other hand, the inner opening portion 242 of groove portion 24 is configured at the position separated in the circumferential with the 1st seam 230.Therefore, The water for entering radially inner side from outside by groove portion 24 can be made to collide for the time being with annular wall 23, water can be prevented inside to diameter Side is immersed.That is, can prevent the water for entering radially inner side from outside by groove portion 24 from immersing simply by the 1st seam 230 The inside of motor 1.Specifically, the water that radially inner side is entered from outside by groove portion 24 stitches 250, but meeting and ring by the 2nd Shape wall 23 collides, so that the water be prevented to immerse to radially inner side.It is prevented by outside annular wall 25 from outside by groove portion 24 The water that radially inner side is immersed in part in addition is advanced towards radially inner side.Therefore, in the motor of present embodiment 1, can press down Water processed reaches bearing portion 4 from outside.The case where according to water identical mechanism, be also able to suppress dust from outside and reach bearing portion 4。

In addition, the axial depth of groove portion 24 can be constant, but can also be using the knot that gradually deepens towards radial outside Structure.It is discharged to the outside by adopting such structure, can become to change places the water capacity, and water is not easy the knot inside immersion Structure.

Fig. 6 is the top view for showing the 1st variation of motor 1 of embodiments of the present invention.Fig. 6 is seen from axial upside Examine the figure of the motor 1A of the 1st variation.In Fig. 6, label 31A is axis.Motor 1A, which has, to be fixed on the upper surface of shell 20A Cover 21A.Covering 21A has cover main body portion 210A and flange part 211A.The internal structure of the part of quilt cover main part 210A covering It is identical as the 1st embodiment.

In the motor 1A of the 1st variation, when from axial overlook view, the periphery of flange part 211A is located at than cover The position of the periphery of 202A in the inner part.It is different from the structure of the 1st embodiment about this respect.It is seen being overlooked on the upside of axial direction When examining, the non-quilt cover 21A of a part for the groove portion 24A being arranged on the upper surface of cover 202A is covered but is exposed to outside.Separately Outside, it in the structure of this variation, can be, the external-open oral area 241A of groove portion 24A is located at the outer circumference end than cover 202A and leans on diameter Position inwardly.

Fig. 7 is the outline enlarged drawing for showing the relationship between the cover 202A of the motor 1A of the 1st variation and cover 21A.Fig. 8 It is the schematic sectional view along the position B-B of Fig. 7.As shown in Figure 7 and Figure 8, cover 202A has radial slot 2021 and through hole 2022.Radial slot 2021 is recessed downwards from the upper surface of cover 202A, and radially extends.Through hole 2022 is vertically by diameter It is penetrated through to the bottom wall of the end of the radially inner side of slot 2021.Specifically, when from axial overlook view, radial slot 2021 be Radial both ends have the rectangular shape of fillet.When from axial overlook view, 2022 circular in shape of through hole.But The shape of radial slot 2021 and through hole 2022 can be other shapes.

Flange part 211A makes the end of the radial outside of radial slot 2021 expose and exist with the radially inner side of radial slot 2021 It is overlapped in axial direction.Specifically, radial slot 2021 is covered other than the end of radial outside by flange part 211A.As a result, can Enough the water for accumulating in the inside of shell 20A due to moisture condensation etc. is discharged to the outside using through hole 2022 and radial slot 2021. In addition, covering a part of radial slot 2021 by flange part 211A, thus, it is possible to prevent water to be directly entered through hole from outside 2022.That is, water can be made to be not easily accessed the inside of motor 1A.Use a part of cover 21A as covering radial slot 2021 Therefore the component of a part is able to suppress the increase of component count.

Fig. 9 is the top view for showing the 2nd variation of motor 1 of embodiments of the present invention.Fig. 9 is seen from axial upside Examine the figure of the motor 1B of the 2nd variation.Figure 10 is the side view of the motor 1B of the 2nd variation shown in Fig. 9.In Fig. 9, with list Chain-dotted line is come part that can't see originally in the case where expression from the upside of axial direction.In figure 9 and in figure 10, label 31B is Axis.In a same manner as in the first embodiment, shell 20B has housing body portion 201B and cover 202B.

In the motor 1B of the 2nd variation, the lower surface of cover 21B is provided with upside in the axial direction and is recessed and radially prolongs The groove portion 24B stretched.Specifically, cover 21B has the cover main body portion 210B of bottomed cylindrical and from the lower end of cover main body portion 210B To radial outside flange part 211B outstanding.Flange part 211B is contacted with the upper surface of cover 202B.Groove portion 24B is set to flange The lower surface of portion 211B.Groove portion 24B is provided with multiple.In this variation, the quantity of groove portion 24B is 5, but the quantity can be with Change.

The external-open oral area 241B of groove portion 24B is located at the end of the radial outside of cover 21B.External-open oral area 241B is in radial outside Opening.The inner opening portion 242B of groove portion 24B is located at radial position identical with the inner peripheral surface of cover 21B, inside in diameter in the position Side opening.Specifically, inner opening portion 242B is located at radial position identical with the inner peripheral surface 2101 of cover main body portion 210B.

In this variation, there is the annular wall 23B of quilt cover 21B covering in the upper surface of cover 202B.Annular wall 23B tool Have the 1st seam 230B of the face in the radially inner side of annular wall 23B and outside perforation.1st seam 23B it is circumferentially arranged have it is multiple. In this variation, the quantity of the 1st seam 230B is 5, but the quantity can change.In addition, not set in the 2nd variation Configuration is set in the outside annular wall of the radial outside of annular wall 23B.

1st seam 230B and inner opening portion 242B is configured at the position separated in the circumferential.Therefore, can make from outside by Groove portion 24B and enter the water of radially inner side and collided for the time being with annular wall 23, water can be prevented to immerse to radially inner side.

The structure of embodiment and variation illustrated above is only illustration of the invention.Embodiment and variation Structure can suitably change in the range of being no more than the thought of technology of the invention.In addition, embodiment illustrated above and Multiple variations can be implemented in combination in appropriate range.

In addition, the present invention also can be applied to the motor other than the motor 1 that central axis A is vertically extended.For example, Present invention could apply to the horizontally extending motors of central axis A.

The present invention for example can be widely applied for configuration and without wait the motor etc. being easy in the environment poured by water.This hair It is bright for example to be used in the motor of air conditioner for being applied to railway.

Claims (9)

1. a kind of motor, includes

Stationary part, with shell；

Rotating part is pivoted about with the central axis vertically extended；And

Bearing portion, by rotating part bearing for that can be rotated relative to the stationary part,

The stationary part includes

Annular wall is configured at the upper surface of the shell and leans on the position of radial outside than the bearing portion；And

Cover, is fixed on the upper surface of the shell, covers the annular wall and the bearing portion,

The motor is characterized in that,

The annular wall has the 1st seam for penetrating through the face in the radially inner side of the annular wall and outside,

At least one party in the upper surface of the shell and the lower surface of the cover is provided with along axial depression and along packet Groove portion containing the direction extension including radial ingredient,

The groove portion includes

External-open oral area, in outside of the radial outside towards the motor；And

Inner opening portion is open in radially inner side,

The inner opening portion is located at identical radial position or is located at radially inner side compared with the inner peripheral surface of the cover,

1st seam is configured at the position separated in the circumferential with the inner opening portion.

2. motor according to claim 1, which is characterized in that

The groove portion is set to the upper surface of the shell,

It is additionally provided with outside annular wall in the upper surface of the shell, the diameter which is configured at the annular wall is outside Side and the position that radially inner side is leaned on than the inner peripheral surface of the cover,

The outside annular wall have by the face in the radially inner side of the outside annular wall and outside perforation and with the inner opening The 2nd seam that portion is connected.

3. motor according to claim 1, which is characterized in that

The 1st tapering that 1st sewer has circumferential width to narrow from radially inner side towards outside.

4. motor according to claim 1, which is characterized in that

The 2nd tapering that 2nd sewer has circumferential width to narrow from radially inner side towards outside.

5. motor according to claim 1, which is characterized in that

The rotating part has by the inner cover of the cover covering,

The inner cover is configured at the radially inner side of the upper surface side of the shell and the annular wall, covers the bearing portion At least part of upper surface.

6. motor according to claim 1, which is characterized in that

The outward opening portion is located at the end of the radial outside of the shell.

7. motor according to claim 1, which is characterized in that

1st seam and the groove portion are respectively in the circumferential at spaced intervals configured with multiple.

8. according to claim 1 to motor described in any one in 7, which is characterized in that

The shell includes

Housing body portion has opening on top；And

Cover covers the top of the housing body portion,

The cover fixed part is fixed on the shell, which is fixed on the housing body portion for the cover.

9. motor according to claim 1, which is characterized in that

The shell includes

Housing body portion has opening on top；And

Cover covers the top of the housing body portion,

The cover includes

Radial slot is recessed downwards, radially extends；And

Through hole along the vertical direction penetrates through the bottom wall of the end of the radially inner side of the radial slot,

The cover includes

Cover main body portion；And

Flange part, it is prominent from the lower end in the cover main body portion to radial outside, it is contacted with the upper surface of the cover,

The flange part exposes the end of the radial outside of the radial slot and with the radially inner side of the radial slot in axial direction Upper overlapping.