WO2005060075A1 - モータカバーおよびこれを備えた電動モータ - Google Patents
モータカバーおよびこれを備えた電動モータ Download PDFInfo
- Publication number
- WO2005060075A1 WO2005060075A1 PCT/JP2004/018612 JP2004018612W WO2005060075A1 WO 2005060075 A1 WO2005060075 A1 WO 2005060075A1 JP 2004018612 W JP2004018612 W JP 2004018612W WO 2005060075 A1 WO2005060075 A1 WO 2005060075A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electric motor
- cover
- motor
- metal component
- case body
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/38—Control circuits or drive circuits associated with geared commutator motors of the worm-and-wheel type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2186—Gear casings
- Y10T74/2189—Cooling
Definitions
- the present invention includes a motor cover for closing a case provided in an electric motor, the motor cover including a resin cover body to which the first and second metal parts are fixed by insert molding, and the motor cover.
- the present invention relates to an electric motor.
- an electric motor that is operated by a power source such as a battery mounted on the vehicle is generally used.
- a speed reduction mechanism attached thereto and is regarded as one unit as an electric motor with a speed reduction mechanism.
- Such an electric motor usually has a case body formed in a bathtub shape for accommodating a speed reduction mechanism, and an opening of the case body is closed by a motor cover. . It is also known that a control board or the like for controlling the operation of the motor body is accommodated in a case body. In this case, heat of an electronic component such as an FET mounted on the control board is externally provided on the motor cover. An aluminum heat sink for emission is fixed.
- the motor cover is usually made of resin, and the heat sink is fixed to the resin portion of the motor cover, that is, the cover body by insert molding.
- a power supply terminal formed by a copper plate or the like is fixed to the motor cover. It is fixed to the motor cover by insert molding as shown in FIG. In other words, the heat sink and each terminal are placed inside the mold that forms the cover body, and then the molten heat is poured into the mold to fix the heat sink and the terminal integrally to the resin cover body.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-61947
- An object of the present invention is to prevent displacement of two metal parts fixed to a resin cover body by insert molding, and to improve the workability of assembling the motor cover.
- the motor cover of the present invention includes a resin cover body to which the first and second metal parts are fixed by insert molding in a state where they are separated from each other, and closes a case body provided in the electric motor.
- a cover an inflow portion into which the resin material is poured when the cover main body is insert-molded; and a branch portion formed to branch off from the inflow portion and into which the resin material is poured through the inflow portion. Is provided on the first metal component, A part of the second metal component is arranged at the branch portion.
- the motor cover of the present invention is characterized in that an area of a cross section perpendicular to a longitudinal axis of the branch portion is formed smaller than an area of a cross section perpendicular to the longitudinal axis of the inflow portion.
- the first metal component is a heat sink that is disposed to face a control circuit that controls the electric motor and that discharges heat inside the case body to the outside.
- the metal part is a power supply terminal for electrically connecting the control circuit and the electric motor.
- the motor cover according to the present invention is characterized in that the inflow portion and the branch portion are formed in the heat sink in a groove shape.
- the motor cover of the present invention is characterized in that the first metal component is exposed only from one of the front surface and the back surface of the cover main body.
- a heat dissipating resin portion that contacts the first metal component and a base that supports the heat dissipating resin portion are provided on the cover main body, and the heat dissipating resin portion is formed of a heat conductive resin material.
- the base is formed of a resin material different from the heat conductive resin material.
- the motor cover of the present invention is characterized in that the first metal component is formed of an aluminum material.
- the case body is formed of a conductor, and a power supply unit that controls power supply to the electric motor and is electrically connected to the first metal component is provided in the case body.
- the cover main body is fixed to the case body by a fixing member formed of a conductor and housed, and the first metal component is electrically connected to the case body.
- the motor cover of the present invention is characterized in that the power supply unit is composed of a brush device for supplying power to the electric motor.
- the motor cover according to the present invention is characterized in that the power supply unit includes a control circuit for controlling the electric motor.
- the motor cover of the present invention is formed with a clip portion that engages with the case body and the cover body to fix the cover body to the case body, and that protrudes from the clip portion.
- the fixing member includes a contact portion that contacts the first metal component.
- the motor cover according to the present invention is characterized in that the contact portion is fixed to a press-fit portion provided on the first metal component by press-fitting.
- the electric motor of the present invention is an electric motor including a case body and a motor cover that closes the case body, and is fixed by insert molding in a state where the first and second metal parts are separated from each other.
- a cover body made of resin is provided on the motor cover, and an inflow portion into which the resin material is poured when the cover body is insert-molded, and a branch formed with respect to the inflow portion through the inflow portion.
- a branch into which the resin material is poured is provided on the first metal component, and a part of the second metal component is arranged on the branch.
- the electric motor of the present invention is characterized in that an area of a cross section perpendicular to the longitudinal axis of the branch portion is formed smaller than an area of a cross section perpendicular to the longitudinal axis of the inflow portion.
- the first metal component is a heat sink that is disposed to face a control circuit that controls the motor main body and that discharges heat inside the case body to the outside.
- the second metal component is a power supply terminal for electrically connecting the control circuit and the motor body.
- the electric motor according to the present invention is characterized in that the inflow portion and the branch portion are formed in the heat sink in a groove shape.
- the electric motor of the present invention is characterized in that the first metal component is exposed only from one of the front surface and the back surface of the cover body.
- a heat radiating resin portion that contacts the first metal component and a base that supports the heat radiating resin portion are provided on the cover main body, and the heat radiating resin portion is formed of a heat conductive resin material.
- the base is formed of a resin material different from the heat conductive resin material.
- the electric motor of the present invention is characterized in that the first metal component is formed of an aluminum material.
- the case body is formed of a conductor.
- a power supply unit electrically connected to the first metal component is housed in the case body, and the cover body is fixed to the case body by a fixing member formed of a conductor, and A first metal component is electrically connected to the case body.
- the electric motor according to the present invention is characterized in that the power supply unit is a brush device for supplying power to the electric motor.
- the electric motor according to the present invention is characterized in that the power supply unit includes a control circuit for controlling the electric motor.
- the electric motor of the present invention includes a clip portion that engages with the case body and the cover body to fix the cover body to the case body, and that is formed so as to protrude from the clip portion.
- the fixing member includes a contact portion that contacts the metal component.
- the electric motor according to the present invention is characterized in that the contact portion is fixed to a press-fit portion provided on the first metal component by press-fitting.
- the first metal component is provided with the branch portion formed to be branched from the inflow portion, and a part of the second metal component is separated from the first metal component.
- the second metal part is fixed to the branch part by the resin material poured into the branch part even if the resin material poured into the inflow part shrinks because it is arranged in the branch part in the state And the displacement is suppressed.
- the branch portion is formed smaller than the inflow portion, the resin material flowing into the branch portion hardens faster than the resin material at the inflow portion, so that the displacement of the second metal component can be further suppressed. . Therefore, a post-process such as correcting the position of the second metal component becomes unnecessary, and the workability of assembling the motor cover can be improved.
- the displacement of the second metal component is suppressed, it is possible to prevent the second metal component from coming into contact with the first metal component.
- the resin is interposed between the heat sink and the terminal, so that the heat sink and the terminal are connected. Short circuit due to contact with one terminal can be prevented.
- the first metal component provided on the motor cover is exposed only from one of the front surface and the back surface of the cover main body. Thus, a resin layer that spreads over the entire surface can be formed. This prevents water from leaking from between the first metal component and the cover body, thereby dramatically improving the waterproofness of the motor cover.
- the conventional process provided for ensuring the waterproofness of the motor cover can be omitted, and the cost of the motor cover and the electric motor can be reduced.
- the first metal component is formed by forming the heat radiation resin portion of the cover body from a heat conductive resin material and forming the base supporting the heat radiation resin portion from a resin material different from the heat conductive resin material. When a heat sink is used, the heat of the control circuit and the like contained in the case can be efficiently released to the outside.
- the power supply portion for the electric motor is electrically connected to the case body via the fixing member for fixing the motor cover to the case body.
- the noise shielding effect of parts and the case body can be enhanced.
- malfunction of the power supply unit due to noise can be prevented, and the operation reliability of the electric motor can be improved.
- the first metal component and the case body are electrically connected by the fixing member that fixes the motor cover to the case body, the number of parts and the number of assembling steps that require no separate connection structure are reduced. The cost of the motor cover and the electric motor can be reduced.
- the contact portion of the fixing member is fixed to the press-fit portion of the first metal member by press-fitting, the contact portion can be reliably connected to the first metal component.
- FIG. 1 is an explanatory view showing a case where an electric motor with a speed reduction mechanism provided with a motor cover according to an embodiment of the present invention is applied to a wiper device.
- FIG. 2 is a perspective view showing details of an electric motor with a speed reduction mechanism shown in FIG. 1.
- FIG. 3 is a partially cutaway sectional view taken along line aa in FIG. 2.
- FIG. 4 is a perspective view showing details of a clip shown in FIG. 2.
- FIG. 5 is a cross-sectional view showing a state where the motor cover is fixed to the case body by the clip shown in FIG. 4.
- FIG. 6 (a) and (b) are cross-sectional views showing the process of fixing the inclined part shown in Fig. 4 to the press-fitting part, respectively. It is.
- FIG. 7 is a perspective view showing details of a motor cover shown in FIG. 2.
- FIG. 8 is a perspective view showing details of a heat sink and terminals before insert molding.
- FIG. 9 is a cross-sectional view showing a state of a power supply terminal after insert molding.
- FIG. 10 (a) is a plan view showing a modification of the motor cover shown in FIG. 2, and FIG. 10 (b) is a cross-sectional view taken along line aa in FIG. 10 (a).
- FIG. 11 (a)-(c) are cross-sectional views each showing a modified example of the motor cover shown in FIG. 10.
- the vehicle 11 is provided with a wiper device 13 for wiping rain or splashes from a preceding vehicle attached to the windshield 12 to secure a driver's view.
- the wiper device 13 has two wiper shafts 14a and 14b rotatably supported by the vehicle 11, and a wiper arm 15a on the driver's seat side, that is, the DR side is fixed to the wiper shaft 14a, and is attached to the wiper shaft 14b.
- the wiper arm 15b on the passenger side, that is, the AS side, is fixed.
- the driver's seat side that is, the wiper blade 16a on the DR side is mounted on the distal end of the wiper arm 15a on the DR side
- the passenger side ie, the wiper blade 16b on the AS side
- Each of the wiper blades 16a, 16b has a pressing force applied by a spring, not shown, provided inside the wiper arms 15a, 15b, so as to resiliently contact the windshield 12.
- the wiper device 13 In order to drive each of the wiper shafts 14a and 14b, the wiper device 13 is provided with an electric motor 17 with a reduction mechanism as an electric motor also called a wiper motor.
- the electric motor 17 with a speed reduction mechanism is connected to the respective wiper shafts 14a, 14b via a link mechanism 18, and by rotating the crank arm 18a of the link mechanism 18, the wiper shafts 14a, 14b are moved within a predetermined angle range. It oscillates.
- the wiper shafts 14a and 14b swing, the wiper blades 16a and 16b swing in the wiping ranges 12a and 12b on the windshield 12 between the upper turning position and the lower turning position. They are being wiped out.
- FIG. 2 is a perspective view showing details of the electric motor with a speed reduction mechanism shown in FIG. 1, and
- FIG. 3 is a partially cutaway sectional view taken along line aa in FIG.
- the electric motor 17 with a speed reduction mechanism has a motor body 21 and a speed reducer 22.
- a so-called brushed electric motor is used as the motor body 21.
- the motor main body 21 includes a yoke 21a formed in a cylindrical shape with a bottom by a conductor such as a steel material, and a rotating shaft 21b protruding from the yoke 21a. It operates by direct current from the power supply) to rotate the rotating shaft 21b.
- the motor body 21 is not limited to an electric motor with a brush, but may be an electric motor of another type such as a brushless DC motor.
- the speed reducer 22 has a case body 24 fixed to the yoke 21a by the fastening member 23.
- This case body 24 is formed in a bathtub shape by manufacturing an aluminum material (aluminum alloy) as a conductor, and accommodates a speed reduction mechanism 25 therein as shown in FIG.
- the speed reduction mechanism 25 is a form gear mechanism having a worm 26 and a worm wheel 27 that meshes with the worm 26, and the worm 26 is integrated with the outer periphery of a rotating shaft 21 b projecting into the case body 24. And rotates with the rotation shaft 21b.
- the worm wheel 27 is fixed to the base end of an output shaft 31 rotatably supported by a boss 24a formed on the case body 24, and rotates inside the case body 24 together with the output shaft 31. It is free.
- the rotating shaft 21b rotates, the rotation is reduced to a predetermined number of rotations by the reduction mechanism 25 and output from the output shaft 31.
- a motor cover 32 is fixed to the case body 24 by clips 33a and 33b, and an opening of the case body 24 is closed by the motor cover 32.
- the motor cover 32 has a cover body 34 formed in a lid shape from a resin material which is a non-conductive material.
- the cover body 34 comes into contact with the outer edge of the opening of the case body 24 at the resin portion.
- a heat sink 35 as a first metal component having a plurality of fins 35a is fixed to the cover body 34 by insert molding.
- the heat sink 35 is made of aluminum material, and its outer surface is exposed on the back side and the front side of the motor cover 32.
- FIG. 4 is a perspective view showing details of the clip shown in FIG. 2
- FIG. 5 is a cross-sectional view showing a state where the motor cover is fixed to the case body by the clip shown in FIG.
- the motor cover 32 is a force fixed to the case body 24 by the clips 33a and 33b.
- One clip 33a fixes the motor cover 32 to the case body 24 and attaches the heat sink 35 to the case body 24. It also has a function of electrically connecting.
- the details of the clip 33a will be described.
- the clip 33a as a fixing member is formed of a steel plate as a conductor, and includes a clip portion 36 having a function of fixing the motor cover 32 to the case body 24, and a clip portion 36. And a contact portion 37 that protrudes and contacts the heat sink 35.
- the clip portion 36 has a base portion 38 formed in a flat plate shape and a pair of elastically deforming portions 39 and 40 provided on both sides of the base portion 38 and having an S-shaped cross section. Engagement holes 39a and 40a are provided in 40, respectively. In addition, a pair of engaging claws 41a and 41b extending in the width direction are provided on one of the elastically deforming portions 39 on the side of the motor cover 32.
- the engaging claws 41a and 41b are pulled to the hook portions 42a and 42b provided on the motor cover 32, as shown in FIG. I can help.
- the engagement hole 39a of the elastic deformation portion 39 is engaged with the cover-side engagement projection 43 provided on the motor cover 32.
- the elastic deformation portion 40 is pressed against the case-side engagement projection 44 provided on the case body 24 to elastically deform the two elastic deformation portions 39 and 40 in a direction away from each other.
- the hole 40a is engaged with the case-side engaging projection 44.
- the clip portion 36 engages with the engaging projections 43 and 44 at the engaging holes 39a and 40a in a state where the elastically deforming portions 39 and 40 are elastically deformed away from each other. Accordingly, the engagement projections 43 and 44 are urged in a direction approaching each other by the elastic force of the elastic deformation portions 39 and 40, whereby the case body 24 and the motor cover 32 are clipped. It is fixed to each other by the locking part 36. At this time, the clip portion 36 is in contact with the case body 24 at the elastically deformable portion 40, and thus the clip 33a is in a state of being electrically connected to the case body 24.
- the contact portion 37 is formed so as to protrude toward the motor force bar 32 from one elastic deformation portion 39 on the side of the motor cover 32, and is bent along the motor cover 32 to reach the outer surface of the heat sink 35.
- the tip 37a comes into contact with the heat sink 35.
- a pair of inclined portions 45a and 45b are provided at the tip portion 37a of the contact portion 37, and these inclined portions 45a and 45b are press-fitted into press-fit portions 46 provided on the heat sink 35 and fixed. ing.
- FIGS. 6 (a) and 6 (b) are cross-sectional views each showing a process of fixing the inclined portion shown in FIG. 4 to the press-fit portion.
- the press-fit portion 46 is integrally provided on the heat sink 35. It consists of a pair of walls 46a and 46b facing each other at a predetermined interval.
- the inclined portions 45a and 45b provided in the contact portion 37 are inclined with respect to the outer surface of the heat sink 35 in such a direction as to gradually narrow the mutual distance toward the heat sink 35 side. ),
- the maximum interval W1 between the inclined portions 45a and 45b before the press-fitting is set to be larger than the interval W2 between the wall portions 46a and 46b. Then, as shown in FIG.
- the contact portion 37 is applied to the directional force press-in portion 46 perpendicular to the outer surface of the heat sink 35 so that the inclined portions 45a, 45b contact the walls 46a, 46b, respectively. It is press-fitted and fixed to the heat sink 35. Further, when each of the inclined portions 45a and 45b is press-fitted into the press-fitting portion 46, they are elastically deformed in a direction to reduce a distance between the inclined portions 45a and 45b. Will be. Therefore, the distal end portion 37a of the contact portion 37 is securely fixed to the press-fit portion 46, and is not easily separated from the press-fit portion 46 due to vibration or the like.
- a control board is provided inside the case body 24 so as to face the heat sink 35.
- the control board 51 controls the operation of the motor main body 21.
- the control board 51 has a function as a so-called microcomputer having a control circuit formed by a plurality of electronic components 51b such as a CPU, a memory, and an FET on a board 51a.
- a DC current from a battery (not shown) mounted on the vehicle 11 is supplied to the motor body 21 in response to the The operation of the main body 21 is now controlled.
- the control board 51 is fixed to the heat sink 35, and an electronic component 51 b such as an FET mounted on the control board 51 is adhered to the back surface of the heat sink 35.
- an electronic component 51 b such as an FET mounted on the control board 51 is adhered to the back surface of the heat sink 35.
- the heat generated by these electronic components 51b is released to the outside by the heat sink 35. That is, the heat sink 35 radiates the heat inside the case body 24 to the outside.
- the heat sink 35 is provided with a connecting portion 35b protruding toward the control board 51, and a part of a ground line (not shown) of the control board 51 facing the connecting portion 35b is not shown.
- the control board 51 is provided around the through hole, and is fixed to the connection portion 35b by a screw member 52 penetrating the through hole.
- the connection portion 35b and the ground line, that is, the heat sink 35 and the control board 51 are electrically connected.
- Reference numeral 53 denotes a separator for separating the speed reduction mechanism 25 from the control board 51.
- the heat sink 35 is electrically connected to the case body 24 by the clip 33. Become. Then, when the heat sink 35 is electrically connected to the case body 24, the impedance between the case body 24 and the heat sink 35 is reduced, thereby improving the noise shielding effect of the case body 24 and the heat sink 35. become. That is, the case body 24 and the heat sink 35 form a so-called shield room, and it is housed inside the case body 24 to shield external noise from the control board 51 surrounded by the case body 24 and the heat sink 35. it can.
- the case body 24 and the heat sink 35 are electrically connected by the clip 33. Can be increased. Therefore, the control board 51 housed inside the case body 24 can be protected from noise, and the malfunction of the control board 51 can be reduced, so that the operation of the electric motor 17 with the speed reduction mechanism can be reliably performed.
- the case body 24 and the heat sink 35 are electrically connected by the clip 33 for fixing the motor cover 32 to the case body 24. There is no need to provide a connection structure for connecting 35. Therefore, the number of parts and the number of assembling steps are reduced, and the cost of the electric motor 17 with the speed reduction mechanism is reduced.
- the strike can be reduced.
- the contact portion 37 provided on the clip 33 is press-fitted into the press-fit portion 46 provided on the heat sink 35 and fixed. It can be securely fixed to 35.
- the contact portion 37 is provided with a pair of inclined portions 45a and 45b whose width is gradually reduced in the press-fitting direction.
- the inclined portions 45a and 45b are press-fitted into the press-fitting portion 46 while being elastically deformed. Therefore, the contact portion 37 can be connected to the heat sink 35 more reliably. Therefore, even if, for example, vibration of the vehicle 11 is applied, the vibration prevents the contact portion 37 from being detached from the press-fitting portion 46 and ensures the operation of the electric motor 17 with the speed reduction mechanism. can do.
- FIG. 7 is a perspective view showing details of the motor cover shown in FIG.
- the cover body 34 is connected to a control board 51 and a connection terminal (not shown) provided on a force bra 54 integrally formed with the cover body 34.
- — 57 is fixed by insert molding, and the control board 51 is connected to the power supply terminals 55 — 57 and the connection terminals of the coupler 54. They are now connected to switches and so on.
- FIG. 8 is a perspective view showing details of the heat sink and the terminal before insert molding
- FIG. 9 is a cross-sectional view showing a state of the power supply terminal after insert molding.
- the heat sink 35 is formed so as to be bent in a direction perpendicular to the flow direction of the inflow portion 61 and the flow direction of the inflow portion 61.
- Five branch portions 62 66 branching from the portion 61 are provided. These inflows 61 and branches 62
- the reference numeral 66 denotes a groove formed in the heat sink 35, and when the cover body 34 is insert-molded, that is, when the molten resin material is injected into a mold (not shown) for molding the cover body 34, the resin material is formed. A part of the resin material is poured into the inflow portion 61, and a resin material is poured into the branch portion 62-66 via the inflow portion 61.
- the cross-sectional area perpendicular to the longitudinal axis of the branches 62-66 is smaller than the cross-sectional area perpendicular to the longitudinal axis of the inflow section 61, that is, the axis facing the inflow direction.
- the branch portions 62-66 are formed smaller than the inflow portion 61.
- the power supply terminal 58 is formed by bending a copper plate into a predetermined shape, and a pair of terminal portions 58a and 58b are provided at both ends thereof.
- the distal end provided with one terminal portion 58a is disposed on the cover body 34 side, and the distal end provided with the other terminal portion 58b is disposed on the branch portion 62.
- the main body 58c between the terminal portions 58a and 58b is arranged along the inflow portion 61.
- the power supply terminal 59 is formed by bending a copper plate into a predetermined shape, and a pair of terminal portions 59a and 59b are provided at both ends thereof.
- One terminal portion 59a is arranged on the side of the cover main body 34 side by side with the terminal portion 58a, and the tip end provided with the other terminal portion 59b is arranged on the branch portion 63.
- the main body 59c between the terminal portions 59a and 59b is arranged along the inflow portion 61.
- the power supply terminals 58 and 59 are arranged so as to be insulated from each other with a predetermined gap between the inflow portion 61 and the branch portions 62 and 63 so as not to contact the heat sink 35.
- a projection 81-85 projecting toward the control board 51 side with respect to the heat sink 35 is formed on each of the locking sections 71-75.
- the electronic components 51b and the like mounted on the 51 are arranged between these projections 8185. That is, these projections 8185 have a function of positioning the electronic component 51b.
- the resin material flowing into the inflow portion 61 flows in the flow direction.
- the power supply terminals 58 and 59 are pulled in the directions shown by arrows in the figure.
- the leading ends of the power supply terminals 58 and 59 are disposed in the branch portions 62 and 63 formed by branching in a direction orthogonal to the inflow portion 61. Even if the resin material shrinks in the flow direction, the movement of the tip portion is suppressed by the locking portions 71, 72 formed in the branch portions 62, 63 being locked by the branch portions 62, 63.
- the branch portions 62 and 63 formed by branching from the inflow portion 61 into which the resin material is poured are provided in the heat sink 35, and a part of the power supply terminals 58 and 59, Since the distal end is arranged in the branching section 62, 63 at a distance from the heat sink 35, the displacement of the terminal sections 58b, 59b of the power supply terminals 58, 59 due to shrinkage of the resin material in the inflow section 61 is suppressed. Can be.
- the terminal portions 58b and 59b are fixed at predetermined positions with respect to the control board 51, a post-process such as correcting the position is not required, and the power supply terminals 58 and 59 and the control board 51 are connected to each other.
- the connection of the motor cover 32 can be facilitated, and the workability of assembling the motor cover 32 can be improved.
- the terminal portions 58b and 59b do not come into contact with the heat sink 35 due to displacement, it is possible to prevent the power supply terminals 58 and 59 from contacting the heat sink 35 and causing a short circuit.
- the area of the cross section perpendicular to the longitudinal axis of the branch portion 6266 is formed smaller than the area of the cross section perpendicular to the longitudinal axis of the inflow portion 61. Therefore, the resin material flowing into the branch portions 62-66 hardens faster than the resin material at the flow portion 61. That is, before the resin material in the inflow portion 61 is completely contracted, the locking portions 71, 72 are hardened and locked to the branch portions 62, 63, so that the terminal portions 58b, 59b due to the contraction of the resin material. The displacement is further suppressed.
- the cross-sectional area of the branch portions 62-66 is formed smaller than the cross-sectional area of the inflow portion 61, the locking portions 71-75 formed in the branch portions 62-66 It hardens faster than the resin material in the inflow section 61, and the displacement of the terminal sections 58b, 59b of the power supply terminators 58, 59 arranged in the branch sections 62, 63 can be further suppressed.
- the locking portions 73-75 formed in the three branch portions 64 66 also harden faster than the resin material in the inflow portion 61, respectively, and each of the branch portions 64-66.
- the movement of the embedded portion 67 formed in the inflow portion 61 by being locked by the 66 is suppressed.
- the resin material in these branch portions 62-66 is formed.
- FIG. 10 (a) is a plan view showing a modification of the motor cover shown in FIG. 2, and FIG. 10 (b) is a cross-sectional view along the line aa in FIG. 10 (a).
- the heat sink 35 is a force S that is insert-molded in the resin cover body 34 so as to be exposed on both the front and back surfaces of the motor cover 32.
- the heat dissipating resin portion that exposes the surface of the heat sink 35 to the outside and covers the back surface of the heat sink 35 (the surface facing the control board 51) on the cover body 92 92a may be provided.
- a heat conductive resin material which is a thermoplastic molding material is used.
- the heat conductive resin material for example, PPS resin (polyphenylene sulfide) is used.
- ceramics filled with ceramics or PPS resin filled with carbon fibers there are used.
- the base material of the thermally conductive resin material is P
- Other engineering plastics such as polyamide resin (polyamide) are not limited to PS resin.
- the filler is not limited to ceramics and carbon fibers, but may be other fillers that enhance thermal conductivity.
- the heat sink 35 when the heat sink 35 is fixed to the motor cover 91 by insert molding, the heat sink 35 is exposed only on the front surface side of the motor cover 91, so that the entire back surface of the heat sink 35 is thermally conductive. It can be covered with a resin material. Therefore, a resin layer is formed on the rear surface of the motor cover 91 without any interruption, so that the waterproof performance of the motor cover 91 can be remarkably improved. In other words, since the motor power bar 91 has a structure in which the heat sink 35 does not penetrate the resin layer, even if a joint failure occurs at the interface between the resin material and the metal material during insert molding, the motor power bar 91 does not penetrate the resin layer.
- the generated gap communicates with the inside of the case body 24, which prevents infiltration of rainwater or the like into the case body 24. Moreover, there is no need to provide a sealant application step or a surface treatment step for the heat sink 35 in order to enhance the waterproof performance of the motor cover 91, so that the manufacturing cost of the motor cover 91, that is, the electric motor 17 with this speed reduction mechanism, is kept low. be able to. Further, since the resin material of the heat radiation resin portion covering the back surface of the heat sink 35 is a heat conductive resin material, heat generated from the control board 51 is efficiently transmitted to the heat sink 35 via the resin layer.
- FIGS. 11 (a) to 11 (c) are cross-sectional views each showing a modification of the motor cover shown in FIG.
- the heat sink 35 incorporated in the motor cover 101 may be exposed only on the back surface of the motor cover 101.
- the heat dissipation resin portion 102a that covers the surface of the heat sink 35 is formed on the cover body 102 of the motor cover 101, so that the resin layer that spreads over the entire surface of the motor cover 101 is formed. And the waterproof performance of the motor cover 101 can be improved. Further, by forming the cover main body 102 with a heat conductive resin material and forming a plurality of heat radiating fins 102b on the heat radiating resin portion 102a of the cover main body 102, the heat of the control board 51 is efficiently released to the outside. be able to.
- the heat cover is provided on the surface of the motor cover 110.
- the resin material may be selectively used for each of the motor covers 110 and 120 after exposing the heat sink 35 on the motor cover 120 and exposing the heat sink 35 on the back surface.
- the cover bodies 111 and 121 of the illustrated motor covers 110 and 120 are provided with heat dissipating resin portions 11 la and 121 a that come into contact with the heat sink 35 and base portions ll lb and 121 b that support the heat dissipating resin portions ll la and 121 a.
- the heat-dissipating resin parts ll la and 121a are formed of a thermally conductive resin material, while the bases 111b and 121 are formed of a resin material different from the thermally conductive resin material, for example, PBT resin (polybutylene terephthalate). Good to be formed.
- it is molded by two-color molding in which two kinds of resin materials are poured in a state where the heat sink 35 is arranged in the molds of the motor covers 110 and 120. Since the molding material of 121a and the bases ll lb, 121b is a resin material, the interface between the heat-radiating resin parts ll la, 121a and the bases ll lb, 121b can be joined well. Accordingly, a wide-strength resin layer can be formed on the entire back surface of the motor cover 110 and the front surface of the motor cover 120, so that the motor covers 110 and 120 can be provided with high waterproof performance.
- the type of the resin material according to each part of the motor covers 110 and 120 it is possible to use a low-cost resin material for the bases 111b and 121b of the motor covers 110 and 120.
- the method of molding the cover bodies 111 and 121 is not limited to two-color molding, but may be insert molding or the like.
- the resin material of the cover main bodies 111 and 121 is not limited to the two types of resin materials, and may use more resin materials.
- the resin material of the base portions 111b and 121b is not limited to PBT resin, and other resin materials may be used.
- the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the scope of the invention.
- the present invention applies the force applied to the motor covers 32, 91, 101, 110, and 120 for closing the case body 24 accommodating the speed reduction mechanism 25.
- Yoke 2 for body 21 Other forms may be used as long as they close the case provided in the electric motor, such as a front bracket that closes the opening of la and has a heat sink and a terminal.
- the electric motor 17 with the speed reduction mechanism is used as a drive source of the wiper device 13.
- the present invention is not limited to this, and other electric motors such as a power window device and a door opening / closing device may be used.
- the present invention may be applied to an electric motor used for a purpose.
- the first metal component is the heat sink 35
- the second metal component is the force S serving as the power supply terminals 58, 59.
- Other metal parts may be used as long as they are metal parts fixed by insert molding.
- the branch portion 6266 branches in a direction perpendicular to the inflow portion 61, and the branching direction is not limited to this.
- the heat sink 35 is not limited to the force S formed of an aluminum material, but may be another metal material having heat conductivity.
- the power supply unit is a control board 51 that controls the operation of the motor main body 21.
- the power supply unit is not limited to this, and may be a brush device that supplies power to the motor main body 21. Is also good.
- the present invention can be applied when manufacturing a motor cover that closes a case body provided in an electric motor.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Cooling System (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04806973A EP1696536A4 (en) | 2003-12-16 | 2004-12-14 | MOTOR COVER AND ELECTRIC MOTOR EQUIPPED WITH THE HOOD |
US10/583,226 US7554235B2 (en) | 2003-12-16 | 2004-12-14 | Motor cover and electric motor equipped with the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-418154 | 2003-12-16 | ||
JP2003418154A JP4545428B2 (ja) | 2003-12-16 | 2003-12-16 | 電動モータ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005060075A1 true WO2005060075A1 (ja) | 2005-06-30 |
Family
ID=34697092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018612 WO2005060075A1 (ja) | 2003-12-16 | 2004-12-14 | モータカバーおよびこれを備えた電動モータ |
Country Status (4)
Country | Link |
---|---|
US (1) | US7554235B2 (ja) |
EP (1) | EP1696536A4 (ja) |
JP (1) | JP4545428B2 (ja) |
WO (1) | WO2005060075A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013129300A1 (ja) * | 2012-02-28 | 2013-09-06 | 東芝キヤリア株式会社 | 電気機器及び空気調和機 |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100712914B1 (ko) * | 2005-11-10 | 2007-05-02 | 엘지전자 주식회사 | 리니어 압축기 |
EP2090499A1 (en) * | 2008-01-25 | 2009-08-19 | GM Global Technology Operations, Inc. | Engine cover with coolings fins |
US8324771B2 (en) * | 2008-02-06 | 2012-12-04 | Nidec Corporation | Spindle motor and storage disk drive apparatus |
DE102008007825A1 (de) * | 2008-02-07 | 2009-08-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Umrichtermotor |
DE102008001359A1 (de) * | 2008-04-24 | 2009-10-29 | Robert Bosch Gmbh | Antriebsvorrichtung von Fahrzeugaggregaten |
DE202009001033U1 (de) * | 2009-01-27 | 2010-06-24 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Elektromotor mit Kühlventilatorwirkung |
US10320265B2 (en) | 2009-07-30 | 2019-06-11 | Mitsuba Corporation | Wiper motor |
CN102474160B (zh) * | 2009-07-30 | 2014-11-12 | 株式会社美姿把 | 带减速机构的电动机 |
DE102009043322A1 (de) * | 2009-09-28 | 2011-03-31 | Valeo Systèmes d'Essuyage | Elektromotorischer Hilfsantrieb |
JP5694749B2 (ja) * | 2010-12-07 | 2015-04-01 | アスモ株式会社 | モータ |
EP2840685B1 (en) * | 2012-04-18 | 2018-08-22 | Mitsubishi Electric Corporation | Ac generator |
WO2014090953A2 (de) * | 2012-12-14 | 2014-06-19 | Continental Automotive Gmbh | Aktuator |
DE112013006102T5 (de) * | 2013-09-06 | 2015-09-10 | Mitsuba Corporation | Elektromotor |
JP2015061451A (ja) * | 2013-09-19 | 2015-03-30 | 株式会社デンソー | 回転電機 |
CN105793127B (zh) | 2013-12-25 | 2018-02-09 | 株式会社美姿把 | 雨刮装置 |
EP3089350B1 (en) * | 2013-12-25 | 2021-09-15 | Mitsuba Corporation | Wiper device and control method for the wiper device |
CN105793123B (zh) * | 2013-12-25 | 2019-01-04 | 株式会社美姿把 | 雨刮电机 |
DE102014206536A1 (de) * | 2014-04-04 | 2015-10-08 | Robert Bosch Gmbh | Elektrische Maschine mit Abschirmblech |
JP6402646B2 (ja) * | 2015-02-19 | 2018-10-10 | 株式会社豊田自動織機 | 電動過給器 |
JP2016208700A (ja) * | 2015-04-23 | 2016-12-08 | アイシン精機株式会社 | アクチュエータ装置 |
JP2017072071A (ja) * | 2015-10-07 | 2017-04-13 | 株式会社豊田自動織機 | 電動圧縮機 |
KR101962861B1 (ko) * | 2016-10-07 | 2019-03-27 | 효성전기주식회사 | 인서트 사출에 의해 히트싱크가 일체로 형성된 피더블유엠 블로워모터 |
US10742087B2 (en) * | 2017-09-07 | 2020-08-11 | Igarashi Electric Works Ltd. | Motor apparatus with waterproof cover for vehicle |
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-
2004
- 2004-12-14 WO PCT/JP2004/018612 patent/WO2005060075A1/ja active Application Filing
- 2004-12-14 US US10/583,226 patent/US7554235B2/en not_active Expired - Fee Related
- 2004-12-14 EP EP04806973A patent/EP1696536A4/en not_active Withdrawn
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JP2001275328A (ja) * | 2000-03-24 | 2001-10-05 | Calsonic Kansei Corp | ブラシレスモータ |
JP2003204654A (ja) * | 2002-01-08 | 2003-07-18 | Mitsubishi Electric Corp | 電動パワーステアリング装置 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013129300A1 (ja) * | 2012-02-28 | 2013-09-06 | 東芝キヤリア株式会社 | 電気機器及び空気調和機 |
GB2513794A (en) * | 2012-02-28 | 2014-11-05 | Toshiba Carrier Corp | Electrical apparatus and air conditioning apparatus |
JPWO2013129300A1 (ja) * | 2012-02-28 | 2015-07-30 | 東芝キヤリア株式会社 | 電気機器及び空気調和機 |
US9516786B2 (en) | 2012-02-28 | 2016-12-06 | Toshiba Carrier Corporation | Electric equipment and air conditioner |
GB2513794B (en) * | 2012-02-28 | 2018-08-22 | Toshiba Carrier Corp | Electric Equipment and Air Conditioner |
Also Published As
Publication number | Publication date |
---|---|
EP1696536A1 (en) | 2006-08-30 |
US20070164621A1 (en) | 2007-07-19 |
EP1696536A4 (en) | 2009-08-26 |
JP4545428B2 (ja) | 2010-09-15 |
US7554235B2 (en) | 2009-06-30 |
JP2005184892A (ja) | 2005-07-07 |
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