WO2015099002A1 - ワイパモータ - Google Patents
ワイパモータ Download PDFInfo
- Publication number
- WO2015099002A1 WO2015099002A1 PCT/JP2014/084220 JP2014084220W WO2015099002A1 WO 2015099002 A1 WO2015099002 A1 WO 2015099002A1 JP 2014084220 W JP2014084220 W JP 2014084220W WO 2015099002 A1 WO2015099002 A1 WO 2015099002A1
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- WO
- WIPO (PCT)
- Prior art keywords
- heat
- housing
- wiper motor
- wiper
- substrate
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
- B60S1/0803—Intermittent control circuits
- B60S1/0807—Intermittent control circuits using electronic control means, e.g. tubes, semiconductors
- B60S1/0811—Intermittent control circuits using electronic control means, e.g. tubes, semiconductors combined with mechanical control means, e.g. thermal relays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/0452—Position of the wipers relative to the vehicle
- B60S1/0472—Arrangement of the wipers on right or left-hand drive vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/16—Means for transmitting drive
- B60S1/166—Means for transmitting drive characterised by the combination of a motor-reduction unit and a mechanism for converting rotary into oscillatory movement
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- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/223—Heat bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/043—Attachment of the wiper assembly to the vehicle
- B60S1/0438—Attachement of separate wiper motor assembly to the vehicle
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/227—Heat sinks
Definitions
- the present invention relates to a wiper motor that swings and drives a wiper member.
- a vehicle such as an automobile is equipped with a wiper device that wipes off deposits such as rainwater adhering to a windshield provided on the vehicle body and secures the driver's view.
- the wiper device mounted on the vehicle include a tandem wiper device that swings and drives a pair of wiper arms via a link mechanism by a single wiper motor, and a pair of wiper arms that are provided by a pair of wiper motors provided on the left and right sides of the vehicle.
- There is a counter-wiping wiper device that is driven to swing.
- the counter-wiping type wiper device has the advantage that the installation space on the vehicle body side can be reduced by the absence of the link mechanism, and as a result, the shock absorption space can be secured and the vehicle body design freedom can be improved. ing.
- Patent Document 1 discloses a wiper motor used in such a counter-wiping wiper device.
- the wiper motor described in Patent Document 1 includes an electric motor that rotates forward and backward, and the rotation of the electric motor is decelerated by a worm and a worm wheel (deceleration mechanism unit) provided in the gear case.
- a reduction mechanism is rotatably accommodated inside the gear case, and the opening of the gear case is sealed by a case cover with a circuit board mounted on the inside.
- the heat of the electronic component mounted on the circuit board is radiated to the outside through the cooling fin member inserted (embedded) in the case cover.
- the wiper motor as described above is required to have a small size and high output along with the diversification of applicable models. That is, in order to solve such a problem, it is necessary to improve the cooling efficiency as much as possible.
- the technique described in Patent Document 1 described above since the size of the cooling fin member depends on the size of the case cover, if the size reduction is advanced, the cooling efficiency is reduced. Further, when inserting the cooling fin member into the case cover, a complicated molding operation using a plurality of dies is required, which causes a problem that the assembling workability of the wiper motor is low.
- An object of the present invention is to provide a wiper motor capable of improving the assembly workability while reducing the size and improving the cooling efficiency.
- One aspect of the present invention is a wiper motor that swings and drives a wiper member, and includes a motor having a rotation shaft, a speed reduction mechanism that decelerates rotation of the rotation shaft, and a substrate on which a plurality of electronic components are mounted.
- a controller that controls rotation of the motor, a housing that rotatably accommodates the speed reduction mechanism, a cover that is mounted inside and closes an opening of the housing, the substrate, and the housing And a heat conducting member that releases heat of the electronic component to the housing.
- a radiating fin for radiating heat from the heat conducting member to the outside is provided at a portion of the housing facing the heat conducting member.
- an elastic member having thermal conductivity is provided between the housing and the thermal conductive member.
- the electronic component is a drive element that drives the motor and a control element that controls the drive element, and the heat conducting member is configured to transfer heat from the drive element and the control element. Relief to housing.
- the driving element is mounted on the first surface of the substrate
- the control element is mounted on the second surface of the substrate
- the heat conducting member is mounted on the first surface side of the substrate.
- the control element is disposed closer to the housing than the drive element.
- the heat conducting member is made of aluminum.
- the heat conducting member is made of ceramic.
- the heat conducting member for releasing the heat of the electronic component to the housing is provided between the substrate on which the electronic component is mounted and the housing, so that the heat of the electronic component is externally passed through the heat conducting member and the housing. Can dissipate heat.
- the housing is made of aluminum having excellent thermal conductivity, the heat of the electronic components can be effectively radiated from the entire housing having a relatively large surface area, and thus both miniaturization and improvement in cooling efficiency are achieved. Can be realized.
- the cover since it is not necessary to insert the cooling fin member required in the conventional structure into the cover, the cover can be easily formed, and as a result, the assembly workability of the wiper motor can be improved.
- FIG. 3 is a cross-sectional view taken along line AA in FIG. 2.
- FIG. 3 is a sectional view taken along line BB in FIG. 2. It is the elements on larger scale of the broken-line circle
- FIG. 6 is a partially enlarged view for comparing the size of the wiper motor according to the first embodiment and the size of the wiper motor according to the second embodiment. It is a figure corresponding to FIG. 5 of the wiper motor which concerns on Embodiment 2 of this invention. It is the elements on larger scale of the broken-line circle
- FIG. 10 is an exploded perspective view showing the inside of the cover of the wiper motor of FIG. 9.
- FIG. 1 is an explanatory diagram for explaining a mounting state of a wiper device including a wiper motor according to Embodiment 1 of the present invention on a vehicle body
- FIG. 2 is a plan view of the wiper motor of FIG. 1 viewed from the front side (output shaft side).
- 3 is a plan view of the wiper motor of FIG. 1 viewed from the back side (cover side)
- FIG. 4 is a sectional view taken along line AA of FIG. 2
- FIG. 5 is taken along line BB of FIG.
- FIG. 6 is a sectional view
- FIG. 6 is a partially enlarged view of a broken line circle C portion of FIG. 5, and FIG.
- a windshield 11 as a windshield is provided on the front side of a vehicle body 10 forming a vehicle such as an automobile.
- the driver side and passenger side parts along the vehicle width direction (left and right direction in the figure) of the vehicle body 10 include the DR wiper device 20 and the AS side, respectively.
- a wiper device 30 is mounted.
- the wiper device according to the present embodiment employs a counter-wiping wiper device provided with a wiper device on each of the driver seat side and the passenger seat side.
- the DR side represents the driver seat side
- the AS side represents the passenger seat side.
- the DR-side wiper device 20 and the AS-side wiper device 30 include a DR-side wiper motor 21 and an AS-side wiper motor 31, respectively.
- Each of the wiper motors 21 and 31 swings the DR wiper arm 22 and the AS wiper arm 32 (not shown in detail) at a predetermined swing angle.
- each wiper blade (not shown) provided at the tip of each wiper arm 22, 32 performs a reciprocating wiping operation on the windshield 11, and thus wipes rainwater and the like adhering to the windshield 11.
- the field of view is secured.
- each wiper arm 22 and 32 and each wiper blade constitute a wiper member in the present invention.
- a dash panel 12 that forms a skeleton of the vehicle body 10 is provided on the front side of the vehicle body 10.
- the dash panel 12 is provided so as to cross between the DR side and the AS side of the vehicle body 10, and both sides in the longitudinal direction of the dash panel 12 are the DR side inside panel 13 and the AS side inside that form the skeleton of the vehicle body 10.
- Each panel 14 is firmly fixed by welding or the like.
- the dash panel 12, the DR side inside panel 13, and the AS side inside panel 14 are all high-strength members.
- the DR side first fixing portion 12a and the AS side first fixing portion 12b are firmly fixed to the dash panel 12 by welding or the like.
- the DR side inside panel 13 is firmly fixed with a DR side second fixing portion 13a and a DR side third fixing portion 13b by welding or the like.
- the AS side second panel 14 a and the AS side third fixing part 14 b are firmly fixed to the AS side inside panel 14 by welding or the like.
- the DR-side wiper device 20 is fixed to the DR-side first fixing portion 12a, the DR-side second fixing portion 13a, and the DR-side third fixing portion 13b by three-point support, and the AS-side first fixing portion 12b, AS The AS-side wiper device 30 is fixed to the side second fixing portion 14a and the AS side third fixing portion 14b by three-point support.
- the shaded portion in FIG. 1 indicates a fixing portion (high strength portion) on the vehicle body 10 side where the DR-side wiper device 20 and the AS-side wiper device 30 are fixed.
- the DR-side wiper motor 21 and the AS-side wiper motor 31 are formed in the same manner as shown in FIG. 1, and each of the wiper motors 21 and 31 includes three attachment portions a, b, and c, respectively.
- the attachment portions a, b, c of the DR-side wiper motor 21 are respectively connected to the DR-side first fixing portion 12a, the DR-side second fixing portion 13a, and the DR-side third fixing portion 13b via fixing bolts (not shown). Attached.
- the mounting portions a, b, c of the AS-side wiper motor 31 are fixed to the AS-side first fixing portion 12b, the AS-side second fixing portion 14a, and the AS-side third fixing portion 14b, respectively, by fixing bolts (not shown). Is attached through.
- the DR-side wiper motor 21 is a so-called reverse wiper motor (reversing wiper motor).
- the DR-side wiper arm 22 By switching the rotation direction of the DR-side wiper motor 21, that is, forward / reverse rotation at a predetermined timing, the DR-side wiper arm 22 (see FIG. 1) is driven to swing within a predetermined wiping range on the windshield 11.
- the DR-side wiper motor 21 includes a motor main body 40 and a speed reduction mechanism main body 50.
- the motor main body 40 includes a motor case 41 formed into a bottomed cylindrical shape by pressing (deep drawing) a magnetic material such as a steel plate.
- a stator 42 formed in a substantially cylindrical shape is fixed inside the motor case 41, and each stator 42 has three-phase coils 42a composed of a U-phase, a V-phase, and a W-phase. It is wound in the way of winding.
- a rotor 43 having a plurality of magnets 43a around it is rotatably provided with a predetermined gap.
- a rotation shaft 44 penetrates and is fixed to the rotation center of the rotor 43, and the rotation shaft 44 rotates together with the rotor 43.
- the motor body 40 according to the present embodiment employs a brushless motor.
- the motor according to the present invention includes a stator 42, a rotor 43, and a rotating shaft 44 housed in a motor case 41.
- the energization timing of the U-phase, V-phase, and W-phase coils 42a is switched by a controller 54b mounted on the inner side of the cover 54, which will be described later, whereby the predetermined rotation torque, rotation speed, and rotation direction
- the rotor 43 (rotating shaft 44) is rotationally driven.
- the front end side (lower side in FIG. 2) of the rotating shaft 44 protrudes from the inside of the motor case 41 and extends to the inside of the speed reduction mechanism main body 50.
- a worm 44a forming the speed reduction mechanism 51 is integrally provided on the distal end side of the rotating shaft 44, and the worm 44a is integrally formed on the outer periphery of the rotating shaft 44 by rolling or the like.
- the bottom 41a of the motor case 41 is formed in a stepped shape.
- the bottom 41 a is provided with an annular recess 41 b that is recessed toward the inside of the motor case 41.
- the bearing housing portion 41c and the stator housing portion 41d are formed inside the motor case 41. Thereby, the length dimension along the axial direction of the motor main body 40 is packed.
- the stator accommodating portion 41d is formed in an annular shape around the bearing accommodating portion 41c, and the stator accommodating portion 41d accommodates one axial end side (right side in the drawing) of the stator 42.
- a metal (slide bearing) BR as a bearing is accommodated in the bearing accommodating portion 41c.
- the metal BR accommodated in the bearing accommodating portion 41c rotatably supports the proximal end side of the rotation shaft 44.
- the portion that generates the most heat when the motor body 40 operates is the stator 42 around which the coils 42a are wound. Therefore, in the present embodiment in which the stator 42 is disposed near the outer periphery of the motor case 41, the heat of the motor body 40 (stator 42) can be effectively radiated to the outside. Further, since the motor main body 40 is mounted so as to be inclined at a predetermined angle with respect to the vehicle body 10 (see FIG. 1), when the DR-side wiper motor 21 is flooded with rainwater W as shown by the broken line arrow in FIG. Rainwater W is held in the annular recess 41b. Also by this, the heat of the motor main body 40 can be effectively radiated to the outside. In addition, while the DR-side wiper motor 21 is flooded during rainy weather or the like (when the motor main body 40 is in operation), the cold rain water W before taking away heat can always flow into the annular recess 41b. Yes.
- the speed reduction mechanism main body 50 includes a speed reducer case 52 that accommodates a speed reduction mechanism 51 therein.
- the reducer case 52 is formed in a bottomed shape by casting a molten aluminum material, and has an outer shape substantially the same as the opening portion of the housing 53.
- a resin cover 54 to be closed.
- the housing 53 and the cover 54 are in close contact with each other via a seal member (not shown), and are integrated by three fastening screws S (see FIG. 3) under this state. This prevents rainwater or the like from entering the reducer case 52.
- a worm wheel 55 forming the speed reduction mechanism 51 is accommodated rotatably.
- the worm wheel 55 is formed in a substantially disk shape by a resin material such as plastic, and gear teeth 55a that mesh with the worm 44a are integrally provided on the outer periphery thereof. Thereby, the worm wheel 55 rotates with the rotation of the rotating shaft 44.
- a base end portion of an output shaft 56 made of a steel rod is fixed so as to be integrally rotatable by serration fitting (not shown), and the output shaft 56 is fixed by a speed reduction mechanism portion 51. It is designed to rotate.
- the rotation of the rotation shaft 44 is decelerated by the worm 44a and the worm wheel 55 (deceleration mechanism unit 51) and transmitted to the output shaft 56 with a high torque.
- a sensor magnet SM formed in a substantially disk shape is mounted on the rotation center of the worm wheel 55 and on the opposite side (lower side in the figure) to the side on which the output shaft 56 is fixed. ing.
- the sensor magnet SM faces a Hall IC 54g described later. Accordingly, a rectangular wave switching signal (not shown) is output from the Hall IC 54g according to the rotation of the sensor magnet SM.
- the switching signal from the Hall IC 54g is input to a CPU (not shown) forming the controller 54b.
- the CPU detects the rotation state (rotation position, etc.) of the output shaft 56, and performs control for switching the rotation direction of the output shaft 56 (rotation shaft 44) according to the detection result.
- the output shaft 56 is rotatably supported by a boss portion 53b provided integrally with the bottom wall portion 53a of the housing 53.
- a cylindrical bearing member 53c is mounted inside the boss portion 53b, so that the output shaft 56 can rotate smoothly without rattling.
- the distal end portion of the output shaft 56 extends to the outside via the boss portion 53 b, and the proximal end portion of the output shaft 56 is accommodated in the housing 53.
- a push nut 56 a is attached to the output shaft 56, thereby preventing the output shaft 56 from rattling in the axial direction with respect to the housing 53.
- a serration portion and a male screw portion are integrally provided at the distal end portion of the output shaft 56.
- the base end portion of the DR-side wiper arm 22 (see FIG. 1) is fixed to the serration portion so as not to be relatively rotatable.
- a fastening nut (not shown) is screwed to the male screw portion with the DR-side wiper arm 22 attached to the serration portion, thereby preventing the DR-side wiper arm 22 from coming off from the serration portion. Done.
- a plurality of heat radiating fins 53 d are integrally provided outside the bottom wall portion 53 a of the housing 53.
- three radiating fins 53d are provided.
- Each radiation fin 53d extends in a direction orthogonal to the axial direction of the output shaft 56 and the axial direction of the rotary shaft 44, and is provided at equal intervals.
- each radiating fin 53d is disposed in a portion 53e of the bottom wall portion 53a that faces a heat conducting member 60 described later, so that heat from the heat conducting member 60 can be efficiently radiated to the outside. .
- the housing 53 is made of aluminum having excellent heat dissipation, and the heat dissipating fins 53d are integrally provided in the housing 53, so that the DR-side wiper motor 21 is lightened and transmitted to the housing 53. Heat is effectively dissipated to the outside quickly.
- the cover 54 is integrally provided with a connector connecting portion 54a to which an external connector (not shown) provided on the vehicle body 10 side is connected.
- a plurality of terminals (not shown) are insert-molded in the connector connecting portion 54a, and the plurality of terminals include terminals for driving current and rotation sensors.
- One end of each terminal is electrically connected to a terminal (not shown) of an external connector, and the other end of each terminal is electrically connected to a controller 54b fixed inside the cover 54. ing. That is, the controller 54b is also housed in the reducer case 52.
- the controller 54b controls forward / reverse rotation of the output shaft 56 by controlling forward / reverse rotation of the rotation shaft 44.
- the insertion direction of the external connector with respect to the connector connecting portion 54a is directed to the side opposite to the mounting portion b side, that is, the lower side in the drawing.
- the DR-side wiper motor 21 and the AS-side wiper motor 31 are mounted on the vehicle body 10 as shown in FIG.
- the connector connecting portion 54a is directed toward the space with a relatively large margin. Accordingly, it is possible for the body maker or the like to easily insert the external connector. This point also leads to an improvement in maintainability of the DR side wiper motor 21.
- the controller 54b controls the DR-side wiper motor 21, and includes a substrate 54c and a plurality of electronic components (a pair of capacitors 54d and 54e, an FET module 54f, and a Hall IC 54g) mounted on the substrate 54c. ).
- the FET module 54f in particular, is a drive system switching that switches the energization state of the three-phase coils 42a at high speed. It is comprised by the element. Therefore, the FET module 54f is an electronic component that generates heat most easily when the motor body 40 is operated.
- the FET module 54f constitutes an electronic component according to the present invention, and is the electronic component that should radiate heat most efficiently among a plurality of electronic components.
- the FET module 54f Only the pair of capacitors 54d and 54e, the FET module 54f, and the Hall IC 54g are mounted on the substrate 54c.
- other electronic components FET module 54f (not shown) are actually shown.
- CPU etc. which are the control elements which control this are also mounted.
- the FET module 54f is formed in a flat plate shape, and a plurality of switching elements (FETs) are provided therein.
- the FET module 54f includes a front surface SF1 and a back surface SF2.
- the front surface SF1 faces the cover 54
- the back surface SF2 faces the substrate 54c. That is, the FET module 54f is disposed between the substrate 54c and the cover 54.
- connection terminals TM are provided on the back surface SF2 side of the FET module 54f, and these connection terminals TM are electrically connected to printed wiring (not shown) of the substrate 54c.
- the FET module 54f is disposed at a portion closest to each of the heat dissipating fins 53d among the electronic components mounted on the substrate 54c, and is covered by the pair of fixing screws S1 (see FIG. 7) via the heat conducting member 60. 54 is fixed inside.
- FIG. 7 in order to clarify the positional relationship between the FET module 54 f and the heat conducting member 60, the illustration of the substrate 54 c is omitted and the heat conducting member 60 is shaded.
- the heat conducting member 60 is formed by bending an aluminum plate to have a substantially S-shaped cross section, and includes a first flat portion 61, a vertical portion 62, and a second flat portion 63.
- the surface area of the first flat portion 61 is set to be larger than the surface area of the second flat portion 63, and the surface SF1 of the FET module 54f is in close contact with the first flat portion 61 through heat radiation grease (not shown). Yes. Thereby, the heat generated in the FET module 54f can be efficiently released (transmitted) to the heat conducting member 60.
- the first flat portion 61 is fixed to the inside of the cover 54 by a pair of fixing screws S2 (see FIG. 7).
- the vertical portion 62 is provided on the opposite side (right side in FIG. 5) of the first flat portion 61 to the output shaft 56 side, and serves to arrange the second flat portion 63 on each radiation fin 53d side of the FET module 54f. Plays. And the 2nd flat part 63 is connected with respect to the opposing part 53e of the housing 53 via the heat radiating sheet 64 so that heat conduction is possible.
- the heat conducting member 60 is provided between the FET module 54 f and the housing 53, and the heat generated by the FET module 54 f is released to the heat radiating fins 53 d of the housing 53.
- the heat dissipation sheet 64 is made of, for example, silicone having thermal conductivity, and is elastically deformed by applying an external force. Then, before the cover 54 is attached to the housing 53, the heat radiating sheet 64 is affixed to the second flat portion 63 as indicated by the broken line arrow m in FIG. Thus, the cover 54 is attached to the housing 53 and the fastening screw S (see FIG. 3) is tightened with a predetermined tightening torque, whereby the heat radiating sheet 64 is elastically deformed and the second flat portion 63 of the heat conducting member 60 and It is provided between the facing portion 53e of the housing 53 and is in close contact with both the heat conducting member 60 and the housing 53 so as to be able to conduct heat.
- the heat conducting member 60 is provided between the FET module 54f and the housing 53, and the heat radiating sheet 64 is provided between the second flat portion 63 and the facing portion 53e. As shown in the heat transfer path), the heat generated by the FET module 54f is efficiently radiated to the outside through the heat conducting member 60, the heat radiating sheet 64, the facing portion 53e, and the heat radiating fins 53d.
- the grease scattering prevention board 70 formed in flat form with resin materials, such as a plastic, is provided between the deceleration mechanism part 51 and the controller 54b.
- sliding grease (not shown) applied to the speed reduction mechanism 51 is prevented from being scattered on the substrate 54c and causing the controller 54b to malfunction.
- the heat conducting member 60 that releases the heat of the FET module 54f to the housing 53 between the FET module 54f and the housing 53 forming the controller 54b. Therefore, the heat of the FET module 54 f can be radiated to the outside through the heat conducting member 60 and the housing 53.
- the housing 53 is made of aluminum having excellent thermal conductivity and has a larger surface area than the conventional cooling fin member, the heat of the FET module 54f can be effectively dissipated, and consequently DR. Both the downsizing of the side wiper motor 21 and the improvement of the cooling efficiency can be realized.
- the cover 54 can be simplified and easily molded, and as a result, the assembly workability of the DR-side wiper motor 21 is improved. It becomes possible.
- the heat dissipating fins 53d for dissipating the heat from the heat conducting member 60 to the outside are provided in the portion 53e of the housing 53 facing the heat conducting member 60.
- the surface area of 53 can be increased, and the heat dissipation of the housing 53 can be further improved.
- the DR wiper motor 21 can be further downsized.
- the heat radiating sheet 64 having heat conductivity is provided between the housing 53 and the heat conducting member 60, the heat generated by the FET module 54f can be released to the housing 53 more efficiently.
- Embodiment 2 of the present invention will be described in detail with reference to the drawings. Note that portions having the same functions as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted. In the second embodiment as well, the detailed structure of the DR wiper motor will be described with reference to the drawings.
- FIG. 8 is a partially enlarged view for comparing the size of the wiper motor of the first embodiment and the size of the wiper motor of the second embodiment
- FIG. 9 is a diagram corresponding to FIG. 5 of the wiper motor according to the second embodiment of the present invention.
- 10 is a partially enlarged view of a broken line circle D portion of FIG. 9, and
- FIG. 11 is an exploded perspective view showing the inside of the wiper motor cover of FIG.
- the DR-side wiper motor 81 has a further downsized structure as compared with the DR-side wiper motor 21 of the first embodiment.
- the connecting portion CP between the motor case 41 and the housing 53 is located approximately in the middle of the axial lengths of the stator 42 and the rotor 43. That is, one axial end side of the stator 42 and the rotor 43 is accommodated inside the motor case 41, and the other axial end side of the stator 42 and the rotor 43 is accommodated inside the housing 53.
- heat can be dissipated through the housing 53 from the stator 42 around which the coils 42 a that generate the most heat when the motor body 40 is operated.
- the length dimension on the motor body 40 side along the axial direction of the rotating shaft 44 with respect to the position of the mounting portion c becomes the length dimension L1 in the first embodiment, and is longer in the second embodiment.
- the length L2 is shorter than the length L1 (L2 ⁇ L1).
- the width dimension of the portion of the housing 53 where the worm 44a is present is shorter in the second embodiment than in the first embodiment.
- the distance from the reference position to the portion where each radiation fin 53d of the housing 53 is located is the distance in the first embodiment.
- the distance W2 is greater than the distance W1 (W2> W1).
- the physique is generally smaller than that in the first embodiment. Therefore, the DR-side wiper motor 81 according to the second embodiment is more easily accommodated inside a quadrangle T (see FIG. 3) that passes through the central portions of the mounting portions a, b, and c. Then, in order to realize the downsizing as described above, the DR-side wiper motor 81 of the second embodiment has the structure of the controller 82 and the structure of the heat conducting member 90 in the first embodiment as shown in FIG. Compared to it.
- the controller 82 controls the DR-side wiper motor 81, and includes a substrate 83 having a first surface 83a and a second surface 83b, an FET module (electronic component) 54f, and a CPU. (Electronic component) 84.
- the FET module 54f is a driving element in the present invention
- the CPU 84 is a control element in the present invention.
- other electronic components such as a capacitor 54d (see FIG. 9), a capacitor 54e (see FIG. 11), a Hall IC 54g, etc. Has been implemented.
- the FET module 54f is mounted on the first surface 83a side of the substrate 83, that is, on the cover 54 side of the substrate 83, via a plurality of connection terminals TM.
- the CPU 84 is mounted on the second surface 83b side of the substrate 83, that is, on the grease scattering prevention plate 70 side of the substrate 83 via a plurality of connection terminals (not shown).
- the FET module 54f and the CPU 84 are mounted on the opposite surfaces of the substrate 83, respectively.
- the FET module 54f is mounted in the substantially center part of the board
- the CPU 84 is mounted at a position near the end along the longitudinal direction of the substrate 83 and at a position close to the heat dissipating fins 53 d of the housing 53. That is, the CPU 84 is provided in a portion closer to the heat radiation fin 53d than the FET module 54f.
- a ceramic heat conduction member 90 having excellent heat dissipation is provided between the surface SF1 of the FET module 54f and the inside of the cover 54. That is, the heat conducting member 90 is provided on the first surface 83 a side of the substrate 83.
- the heat conductive member 90 is formed of a sintered body obtained by baking and solidifying powder such as aluminum oxide, and has excellent heat conductivity as in the first embodiment.
- the heat conducting member 90 has a substantially S-shaped cross section, as in the first embodiment, and includes a first flat portion 91, a vertical portion 92, and a second flat portion 93.
- the surface area of the first flat portion 91 and the surface area of the second flat portion 93 are set to substantially the same surface area.
- the surface SF1 of the FET module 54f is in close contact with the first flat portion 91 via the first heat dissipation sheet (elastic member) 94. As a result, the heat generated in the FET module 54f can be efficiently released (transmitted) to the heat conducting member 90 via the first heat radiating sheet 94.
- the first flat portion 91 is fixed inside the cover 54 with a pair of fixing screws S3 together with the FET module 54f.
- a tilt prevention protrusion 95 that prevents each fixing screw S ⁇ b> 3 from falling is integrally provided inside the cover 54.
- each fixing screw S3 can be easily screwed straight to the cover 54, and the assembly workability of the DR-side wiper motor 81 is improved.
- the plurality of connection terminals TM of the FET module 54 f are held by a plurality of terminal holding portions 97 that are integrally provided inside the cover 54.
- the plurality of terminal holding portions 97 include holding grooves 97a into which the plurality of connection terminals TM are inserted.
- the FET module 54f can be fixed inside the cover 54 without rattling. Further, when the FET module 54f is mounted inside the cover 54, it is possible to prevent the FET module 54f from being erroneously assembled to the cover 54.
- the second flat portion 93 is in close contact with the first surface 83a of the portion near the end portion along the longitudinal direction of the substrate 83 via the second heat radiation sheet (elastic member) 96.
- the thickness dimension of the second heat radiation sheet 96 is set to be thicker than the thickness dimension of the first heat radiation sheet 94.
- the 2nd heat dissipation sheet 96 can fully elastically deform. Therefore, the dimensional error of the board
- first heat radiation sheet 94 from the FET module 54f and peeling of the second heat radiation sheet 96 from the substrate 83 can be suppressed.
- first surface 83 a side of the second heat radiation sheet 96 is in contact with the facing portion 53 e of the housing 53 while being elastically deformed.
- the second heat radiation sheet 96 is disposed to face the CPU 84 with the substrate 83 interposed therebetween. That is, the heat generated by the CPU 84 is transmitted to the second heat radiation sheet 96 through the substrate 83.
- the heat generated by the FET module 54f is transmitted to the first heat dissipation sheet 94 without passing through the substrate 83, the heat dissipation efficiency is very good.
- the heat generated by the CPU 84 is transmitted to the second heat radiation sheet 96 through the substrate 83 as described above, and therefore the heat radiation efficiency tends to be slightly lowered.
- the CPU 84 is arranged closer to each heat dissipating fin 53d of the housing 53 than the FET module 54f to compensate for the decrease in heat dissipating efficiency. Therefore, sufficient heat dissipation efficiency can be obtained also in the CPU 84.
- the heat conducting member 90 is provided between the FET module 54f and the CPU 84 and the housing 53, and the second heat radiation sheet 96 is opposed to the second flat portion 93. It is provided between the part 53e. Therefore, as indicated by the thick broken line arrows (heat transfer paths) in FIG. 10, the heat generated by the FET module 54f and the CPU 84 flows through the heat radiation sheets 94 and 96, the heat conduction member 90, the facing portion 53e, and the heat radiation fins 53d. The heat is efficiently radiated to the outside.
- the heat conducting member 90 and the FET module 54 f are arranged inside the plurality of terminal holding portions 97.
- the plurality of connection terminals TM of the FET module 54 f are inserted into the holding grooves 97 a of the terminal holding portion 97.
- the heat conducting member 90 and the FET module 54f are fixed to the inside of the cover 54 using a pair of fixing screws S3.
- the second heat radiating sheet 96 is attached to the second flat portion 93 of the heat conducting member 90.
- the second heat radiation sheet 96 is substantially L-shaped, but depending on the shape of the first surface 83a of the substrate 83 (the presence or absence of electronic components), a heat radiation sheet of another shape such as a square may be used. Also good.
- the substrate 83 on which a plurality of electronic components other than the FET module 54f are mounted is caused to face a predetermined position inside the cover 54.
- each connection terminal TM of the FET module 54f is inserted into each through hole TH provided in the substrate 83 with high accuracy.
- the substrate 83 is fixed to the inside of the cover 54 using the fixing screw S4.
- each connection terminal TM of the FET module 54f is electrically connected to the substrate 83 by connection means such as soldering, and the mounting of the substrate 83 to the inside of the cover 54 is completed.
- the same functions and effects as those of the first embodiment can be obtained.
- the heat of the CPU 84 can be released to the housing 53 via the heat conducting member 90, so that the thermal runaway of the CPU 84 can be prevented more reliably.
- the controller 82 includes the substrate 83 on which the FET module 54f and the CPU 84 are mounted, the FET module 54f is mounted on the first surface 83a of the substrate 83, and the second surface 83b of the substrate 83 is mounted.
- the CPU 84 is mounted, the heat conducting member 90 is provided on the first surface 83a side of the substrate 83, and the CPU 84 is disposed closer to each heat radiation fin 53d of the housing 53 than the FET module 54f.
- the heat transfer path of the CPU 84 and the heat transfer path of the FET module 54f can be made into heat transfer paths having substantially the same heat transfer efficiency, and sufficient heat dissipation efficiency can be obtained also in the CPU 84.
- the heat conducting member 60 is made of aluminum and the heat conducting member 90 is made of ceramic.
- the present invention is not limited to this, and for example, the heat conducting members 60 and 90 are heated. It may be made of copper having excellent conductivity.
- the heat conducting member 60 may be made of ceramic, and the heat conducting member 90 may be made of aluminum.
- the housing 53 is provided with the three radiating fins 53d integrally.
- the present invention is not limited to this, and the radiating fin is omitted if the housing has sufficient radiating performance. Also good. In this case, it becomes possible to simplify the shape of the mold for molding the housing. Furthermore, when it is necessary to improve heat dissipation, four or more heat dissipating fins may be provided.
- the heat radiation sheet 64, the first heat radiation sheet 94, and the second heat radiation sheet 96 are used as the elastic member having thermal conductivity.
- the present invention is not limited to this.
- a heat dissipating grease having a relatively high viscosity can be employed.
- the heat radiation sheet 64 and the second heat radiation sheet 96 can be omitted.
- the adhesion between the FET module 54f and the heat conducting member 90 is high and sufficient heat conduction is possible
- the first heat radiation sheet 94 can be omitted.
- the rotation sensor provided on the substrates 54c and 83 and facing the sensor magnet SM is shown as the Hall IC 54g.
- the present invention is not limited to this, and the MR sensor or the rotary sensor is used.
- Other rotation sensors such as an encoder IC may be used.
- a brushless motor is used as the motor main body 40.
- the present invention is not limited to this, and a motor with a brush can also be used.
- the wiper motor is used to drive a wiper member forming a wiper device provided in a vehicle such as an automobile and wipe the windshield.
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- Power Steering Mechanism (AREA)
Abstract
Description
Claims (7)
- ワイパ部材を揺動駆動するワイパモータであって、
回転軸を有するモータと、
前記回転軸の回転を減速する減速機構部と、
複数の電子部品が実装された基板を有し、前記モータの回転を制御するコントローラと、
前記減速機構部を回転自在に収容するハウジングと、
前記コントローラが内側に装着され、前記ハウジングの開口部を閉塞するカバーと、
前記基板と前記ハウジングとの間に設けられ、前記電子部品の熱を前記ハウジングに逃がす熱伝導部材と、
を備える、ワイパモータ。 - 請求項1記載のワイパモータにおいて、
前記ハウジングの前記熱伝導部材との対向部に、前記熱伝導部材からの熱を外部に放熱する放熱フィンを設けた、ワイパモータ。 - 請求項1記載のワイパモータにおいて、
前記ハウジングと前記熱伝導部材との間に、熱伝導性を有する弾性部材を設けた、ワイパモータ。 - 請求項1記載のワイパモータにおいて、
前記電子部品は、前記モータを駆動する駆動素子および前記駆動素子を制御する制御素子であって、
前記熱伝導部材は、前記駆動素子および前記制御素子の熱を前記ハウジングに逃がす、ワイパモータ。 - 請求項4記載のワイパモータにおいて、
前記基板の第1面に前記駆動素子が実装され、
前記基板の第2面に前記制御素子が実装され、
前記基板の前記第1面側に前記熱伝導部材が設けられ、
前記制御素子が前記駆動素子よりも前記ハウジング寄りに配置されている、ワイパモータ。 - 請求項1記載のワイパモータにおいて、
前記熱伝導部材がアルミ製である、ワイパモータ。 - 請求項1記載のワイパモータにおいて、
前記熱伝導部材がセラミック製である、ワイパモータ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN201480062903.0A CN105793123B (zh) | 2013-12-25 | 2014-12-25 | 雨刮电机 |
US15/107,584 US20160318483A1 (en) | 2013-12-25 | 2014-12-25 | Wiper motor |
EP14875320.5A EP3089334B1 (en) | 2013-12-25 | 2014-12-25 | Wiper motor |
JP2015554980A JP6474351B2 (ja) | 2013-12-25 | 2014-12-25 | ワイパモータ |
Applications Claiming Priority (4)
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JP2013-267087 | 2013-12-25 | ||
JP2013267087 | 2013-12-25 | ||
JP2014256084 | 2014-12-18 | ||
JP2014-256084 | 2014-12-18 |
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WO2015099002A1 true WO2015099002A1 (ja) | 2015-07-02 |
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PCT/JP2014/084220 WO2015099002A1 (ja) | 2013-12-25 | 2014-12-25 | ワイパモータ |
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US (1) | US20160318483A1 (ja) |
EP (1) | EP3089334B1 (ja) |
JP (1) | JP6474351B2 (ja) |
CN (1) | CN105793123B (ja) |
WO (1) | WO2015099002A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016150636A (ja) * | 2015-02-17 | 2016-08-22 | 株式会社ミツバ | モータ装置及びワイパ装置 |
JP2017147857A (ja) * | 2016-02-17 | 2017-08-24 | 株式会社ミツバ | コントローラ付モータおよび減速機付モータ |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017121215A1 (de) * | 2017-09-13 | 2019-03-14 | Valeo Systèmes d'Essuyage | Bürstenloser Elektromotor |
JP7078455B2 (ja) * | 2017-10-16 | 2022-05-31 | 株式会社ミツバ | 駆動装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005168133A (ja) * | 2003-12-01 | 2005-06-23 | Mitsuba Corp | 電動モータ |
JP2007060775A (ja) * | 2005-08-23 | 2007-03-08 | Asmo Co Ltd | モータ |
JP2007097352A (ja) * | 2005-09-30 | 2007-04-12 | Mitsuba Corp | 電動モータ |
JP2008103619A (ja) | 2006-10-20 | 2008-05-01 | Nec Corp | プリント基板たわみ防止具、プリント基板たわみ防止具の製造方法、プリント基板たわみ防止方法 |
JP2010288383A (ja) * | 2009-06-12 | 2010-12-24 | Mitsuba Corp | 減速機構付き電動モータ |
JP2012210068A (ja) * | 2011-03-30 | 2012-10-25 | Hitachi Automotive Systems Ltd | 電動モータの電子制御装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10153173B4 (de) * | 2001-02-27 | 2019-09-05 | Robert Bosch Gmbh | Elektrischer Antrieb mit einem Wärmeleitelement zur Wärmeabführung von einer elektrischen Schaltung |
JP2005086855A (ja) * | 2003-09-05 | 2005-03-31 | Showa Corp | 電動パワーステアリング装置のモータ制御回路組付構造 |
US7294986B2 (en) * | 2003-09-15 | 2007-11-13 | Intier Automotive Closures Inc. | Reversing motor windshield wiper system |
JP4545428B2 (ja) * | 2003-12-16 | 2010-09-15 | 株式会社ミツバ | 電動モータ |
US7687945B2 (en) * | 2004-09-25 | 2010-03-30 | Bluwav Systems LLC. | Method and system for cooling a motor or motor enclosure |
JP5029170B2 (ja) * | 2007-06-27 | 2012-09-19 | ダイキン工業株式会社 | 電子回路装置 |
JP5397652B2 (ja) * | 2008-02-12 | 2014-01-22 | 株式会社ジェイテクト | 車両用操舵装置 |
DE102008049369A1 (de) * | 2008-09-27 | 2010-04-01 | Valeo Systèmes d'Essuyage | Elektromotorischer Hilfsantrieb für Fahrzeuge |
JP5517650B2 (ja) * | 2010-02-01 | 2014-06-11 | 三菱重工業株式会社 | インバータ一体型電動圧縮機 |
JP5943556B2 (ja) * | 2011-05-30 | 2016-07-05 | 三菱電機株式会社 | ファン駆動用電動機 |
-
2014
- 2014-12-25 EP EP14875320.5A patent/EP3089334B1/en active Active
- 2014-12-25 CN CN201480062903.0A patent/CN105793123B/zh active Active
- 2014-12-25 US US15/107,584 patent/US20160318483A1/en not_active Abandoned
- 2014-12-25 WO PCT/JP2014/084220 patent/WO2015099002A1/ja active Application Filing
- 2014-12-25 JP JP2015554980A patent/JP6474351B2/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005168133A (ja) * | 2003-12-01 | 2005-06-23 | Mitsuba Corp | 電動モータ |
JP2007060775A (ja) * | 2005-08-23 | 2007-03-08 | Asmo Co Ltd | モータ |
JP2007097352A (ja) * | 2005-09-30 | 2007-04-12 | Mitsuba Corp | 電動モータ |
JP2008103619A (ja) | 2006-10-20 | 2008-05-01 | Nec Corp | プリント基板たわみ防止具、プリント基板たわみ防止具の製造方法、プリント基板たわみ防止方法 |
JP2010288383A (ja) * | 2009-06-12 | 2010-12-24 | Mitsuba Corp | 減速機構付き電動モータ |
JP2012210068A (ja) * | 2011-03-30 | 2012-10-25 | Hitachi Automotive Systems Ltd | 電動モータの電子制御装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016150636A (ja) * | 2015-02-17 | 2016-08-22 | 株式会社ミツバ | モータ装置及びワイパ装置 |
JP2017147857A (ja) * | 2016-02-17 | 2017-08-24 | 株式会社ミツバ | コントローラ付モータおよび減速機付モータ |
Also Published As
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JPWO2015099002A1 (ja) | 2017-03-23 |
US20160318483A1 (en) | 2016-11-03 |
CN105793123A (zh) | 2016-07-20 |
CN105793123B (zh) | 2019-01-04 |
EP3089334A4 (en) | 2017-08-16 |
EP3089334B1 (en) | 2019-06-26 |
JP6474351B2 (ja) | 2019-02-27 |
EP3089334A1 (en) | 2016-11-02 |
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