WO2012077540A1 - ワイパモータ - Google Patents
ワイパモータ Download PDFInfo
- Publication number
- WO2012077540A1 WO2012077540A1 PCT/JP2011/077569 JP2011077569W WO2012077540A1 WO 2012077540 A1 WO2012077540 A1 WO 2012077540A1 JP 2011077569 W JP2011077569 W JP 2011077569W WO 2012077540 A1 WO2012077540 A1 WO 2012077540A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- worm wheel
- output shaft
- wiper motor
- swing range
- shaft
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/40—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and oscillating motion
-
- 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
-
- 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
-
- 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
- B60S1/18—Means for transmitting drive mechanically
- B60S1/185—Means for transmitting drive mechanically with means for stopping or setting the wipers at their limit of movement
-
- 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
- B60S1/18—Means for transmitting drive mechanically
- B60S1/26—Means for transmitting drive mechanically by toothed gearing
-
- 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
- B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
- B60S1/34—Wiper arms; Mountings therefor
- B60S1/3488—Means for mounting wiper arms onto the vehicle
- B60S1/3495—Means for mounting the drive mechanism to the wiper shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/22—Cranks; Eccentrics
- F16C3/28—Adjustable cranks or eccentrics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/40—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and oscillating motion
- F16H21/42—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and oscillating motion with adjustable throw
-
- 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
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18184—Crank, pitman, and lever
Definitions
- the present invention relates to a wiper motor for driving a wiper member provided in an automobile or the like.
- a wiper motor as a drive source for driving a wiper member is used in a rear wiper device for wiping a rear window glass provided in an automobile or the like.
- the wiper motor has an electric motor such as a motor with a brush, and a speed reduction mechanism and a motion conversion mechanism are accommodated in a gear case attached to the electric motor.
- the speed reduction mechanism is composed of a worm rotated by an electric motor and a worm wheel meshing with the worm, and the rotation of the electric motor is decelerated by the speed reduction mechanism and transmitted to the worm wheel. Further, the rotational motion of the worm wheel is converted into a swing motion by the motion conversion mechanism and transmitted to the output shaft, and the wiper member attached to the tip of the output shaft is reciprocally swung within a predetermined swing range.
- a narrow-angle type (link type) in which the swing range of the wiper member is narrow
- a wide-angle type (operating gear type) in which the swing range of the wiper member is wide.
- the motion conversion mechanism provided in the narrow-angle type wiper motor includes a lever member (rotating lever) that rotates integrally with the output shaft, and a connecting rod that converts the rotational motion of the worm wheel into a swinging motion and transmits it to the lever member. And have.
- the connecting rod is rotatably connected to the worm wheel by a connecting shaft (support shaft) at a position where one end thereof is radially displaced from the shaft center of the worm wheel, and the other end is rotatably connected to a lever member. ing.
- the motion conversion mechanism provided in the wide-angle type wiper motor has an output gear (gear gear) that rotates integrally with the output shaft, and a motion conversion that converts the rotational motion of the worm wheel to a swing motion and transmits it to the output gear.
- Member member (sector gear).
- the motion conversion member is rotatably connected to the worm wheel by a connecting shaft at a position where one end thereof is radially displaced from the center of the worm wheel, and has a sector gear portion (gear tooth) that meshes with the output gear at the other end. ing.
- a holding plate (holding lever) is provided to swayably connect the gear shaft (swinging center shaft) provided at the center of the sector gear part and the output shaft, and the meshing state between the output gear and the sector gear part is provided. Is retained.
- the worm wheel is formed with a connection hole for assembling the connection shaft at a position shifted in the radial direction from the center of the shaft, and the formation position of the connection hole depends on the wiping range of the wiper member, the position of the output shaft, etc. Set based on.
- a wiper motor in which at least a pair of connecting holes are formed in the worm wheel so that the stop position of the wiper member can be set to either of the both reverse positions.
- the pair of communication holes are formed at positions that are symmetric with respect to the axial center of the worm wheel.
- the pair of communication holes are shifted in the circumferential direction from the positions symmetrical with respect to the axial center of the worm wheel. It is formed.
- the wiping range of the wiper member and the positional relationship of the pair of connecting holes are different between the wide-angle type and the narrow-angle type, the positions of the connecting holes formed in the worm wheel are different. Therefore, conventionally, by preparing separately the worm wheel in which the connection hole corresponding to the wide angle type is formed and the worm wheel in which the connection hole corresponding to the narrow angle type is formed, the wide angle type and the narrow angle type are prepared. I was able to handle any of these. However, in that case, the number of worm wheels increases, and the parts management becomes complicated, and the mold replacement work becomes complicated due to an increase in the number of molds and pieces, resulting in a decrease in productivity and cost increase of the wiper motor. It was.
- the object of the present invention is to improve the productivity of the wiper motor by making it possible to share the worm wheel when the output shaft is swung within the first swing range and when the output shaft is swung within the second swing range. Is to plan.
- the wiper motor of the present invention converts a motor body and a rotational motion of the motor body into a swing motion having a first swing range or a second swing range that is narrower than the first swing range.
- a wiper motor having a motion converting mechanism for transmitting to the worm, wherein the worm is rotationally driven by the motor body, and at least a pair of first oscillating ranges serving as a reference at a position radially displaced from the axial center thereof.
- a worm wheel that is formed by opening at least one pair of second connection holes serving as a reference for the first connection hole and the second swing range on one end side in the axial direction, and meshes with the worm, and the output shaft.
- the first motion conversion member is A pivot wheel is connected to any one of the first connection holes formed in the form wheel, and is pivotally connected to a lever member that rotates integrally with the output shaft.
- the second motion conversion member is one of the second connection holes formed in the worm wheel.
- a connecting shaft that is rotatably connected to one.
- the wiper motor of the present invention is attached to a power feeding circuit electrically connected to the electric motor and an end surface on the other axial end side of the worm wheel, and is provided in the power feeding circuit as the worm wheel rotates.
- a relay plate that switches between a short-circuit state in which the plurality of contact plates are electrically connected to each other and a non-short-circuit state in which the connection is disconnected, and when the output shaft swings in a first swing range; When the output shaft is swung in the second swing range, the contact position between the relay plate and the contact plate is arranged at an equivalent position with respect to the assembly position of the electric motor.
- the wiper motor of the present invention is arranged by shifting the position of the output shaft when the output shaft is swung within the first swing range and when the output shaft is swung within the second swing range. It is characterized by doing so.
- the wiper motor of the present invention includes an angle formed by a line segment connecting the shaft center of the worm wheel and the shaft center of the pair of first connection holes, and the shaft center of the worm wheel and the pair of second connection.
- the angle formed by the line segments connecting the axial centers of the holes is different.
- the distance from the center of the worm wheel to the center of the first connection hole is different from the distance from the center of the worm wheel to the center of the second connection hole. It is characterized by.
- the case where the output shaft is swung in the first swing range and the output shaft is the second connecting hole. It is possible to share the worm wheel when swinging within the swing range. This allows the worm wheel to have a common specification when the output shaft is swung within the first swing range and when the output shaft is swung within the second swing range. There is no need to prepare separate worm wheels for the case of swinging within one swinging range and the case of swinging the output shaft within the second swinging range, and the types of worm wheels can be reduced. Therefore, the parts management of the worm wheel becomes easy, and the mold replacement work is facilitated by reducing the number of molds and pieces for forming the worm wheel, thereby improving the productivity and cost reduction of the wiper motor. .
- the contact position between the relay plate and the contact plate is set to the electric motor when the output shaft is swung within the first swing range and when the output shaft is swung within the second swing range. It arrange
- the types of connector units and relay plates can be reduced. Therefore, it is easy to manage the parts of the connector unit and the relay plate, and the die replacement work is facilitated by reducing the number of molds and pieces for molding the connector unit and the relay plate, thereby improving the productivity and cost of the wiper motor. Reduction can be achieved.
- the position of the output shaft is shifted. Yes. Since the connection hole formation position is set based on the wiper member wiping range, the position of the output shaft, etc., the output shaft is swung in the first swing range and the output shaft is in the second swing range. Even if the contact position of the relay plate and the contact plate is arranged at the same position by shifting the position of the output shaft in the case of swinging, the first connection hole and the second connection It is possible to form the first connecting hole and the second connecting hole in the worm wheel without overlapping the holes.
- FIG. 2 is a cross-sectional view taken along line AA in FIG. It is a top view of a worm wheel. It is a rear view which shows the internal structure of the wiper motor shown in FIG. It is a top view which shows the wiper motor which wipes off the 2nd rocking
- FIG. 6 is a cross-sectional view taken along line BB in FIG. It is a rear view which shows the internal structure of the wiper motor shown in FIG.
- a wiper motor 10 shown in FIG. 1 is used as a drive source of a rear wiper device for wiping a rear window glass provided in a vehicle such as an automobile.
- the wiper motor 10 includes a motor main body (electric motor) 11 and a gear unit portion 12 provided with a motion conversion mechanism that converts the rotational motion of the motor main body 11 into a swing motion and transmits it.
- the motor body 11 is a DC motor with a brush, and includes a motor case (yoke) 13 formed into a bottomed cylindrical shape by pressing a thin steel plate.
- a plurality of arc-shaped permanent magnets 14 magnetized to the N pole and the S pole respectively inward in the radial direction are fixed to the inner peripheral surface of the motor case 13 so as to face each other.
- An armature 15 that faces each permanent magnet 14 via a minute gap is rotatably accommodated in the motor case 13, and a plurality of coils 16 are wound around the armature 15.
- An armature shaft 17 is fixed through the rotation center of the armature 15, and one axial end portion of the armature shaft 17 is rotatably supported on the bottom wall of the motor case 13.
- a cylindrical commutator 18 is fixed to the armature shaft 17 adjacent to the armature 15, and the end of each coil 16 is electrically connected to the commutator 18.
- a pair of brushes 19 are slidably contacted with the outer peripheral surface of the commutator 18.
- the gear frame 21 of the gear unit portion 12 is attached to the motor body 11 on the opening side of the motor case 13.
- the gear frame 21 is open to the motor case 13 side, and the gear frame 21 is fixed to the motor case 13 by a fastening screw 22 in a state where the respective opening end faces abut each other.
- the other axial end of the armature shaft 17 protrudes into the gear frame 21, and a worm shaft 24 is coaxially connected to the other axial end of the armature shaft 17 by a connecting member 23.
- the armature shaft 17 is rotated together. That is, the motor shaft 25 of the motor body 11 is a divided shaft that is divided into the armature shaft 17 and the worm shaft 24.
- the worm shaft 24 is rotatably accommodated in the gear frame 21, and a worm 24 a having a helical tooth portion is formed on the outer peripheral surface of the worm shaft 24.
- the motor shaft 25 is not limited to the split shaft structure, and the armature shaft 17 and the worm shaft 24 may be integrally formed.
- the gear frame 21 is formed in a bottomed shape that opens to the side orthogonal to the axial direction of the motor shaft 25 by aluminum die casting, and a gear case 27 is formed by a gear cover 27 that closes the opening. is doing.
- the gear cover 27 is disposed at a predetermined interval with respect to the bottom wall 21 a of the gear frame 21, and an accommodation space is formed between the bottom wall 21 a of the gear frame 21 and the gear cover 27.
- a speed reduction mechanism 29 that reduces and transmits the rotation of the motor shaft 25, and a motion conversion mechanism 31 that converts the rotational motion of the speed reduction mechanism 29 into a swing motion and transmits it to the output shaft 30. Is housed.
- FIG. 1 is a plan view of the wiper motor 10 with the gear cover 27 removed, and shows the internal structure of the gear unit 12.
- the gear cover 27 is formed in a predetermined shape from a steel plate or the like, and the wiper motor 10 is fixed to the vehicle body at a bracket portion (not shown) provided integrally with the gear cover 27.
- the output shaft 30 is made of a round bar made of metal such as steel, and its axial direction is arranged in a direction orthogonal to the axial direction of the motor shaft 25, that is, in a direction orthogonal to the bottom wall 21 a of the gear frame 21.
- the output shaft 30 is housed in the gear frame 21 at the base end side, and protrudes and extends outward from the gear frame 21 so as to penetrate the bottom wall 21 a of the gear frame 21.
- the bottom wall 21a of the gear frame 21 is integrally formed with a substantially cylindrical shaft holding portion 21b that protrudes outward from the gear frame 21 along the outer peripheral surface of the output shaft 30, and the output shaft 30 is shaft-held.
- the output shaft 30 protrudes from the rear window glass to the outside of the vehicle body, and a wiper member (not shown) for wiping the outer surface of the rear window glass is fixed to the front end portion of the output shaft 30.
- a resin bearing member 33 is provided between the inner peripheral surface of the shaft holding portion 21b and the outer peripheral surface of the output shaft 30, and the output shaft 30 is rotatably supported by the shaft holding portion 21b via the bearing member 33. ing. Further, a seal member 34 is attached to the tip end portion of the shaft holding portion 21b to prevent rainwater, dust, and the like from entering the gear case 28.
- the speed reduction mechanism 29 has a worm 24a rotated by the motor body 11 and a worm wheel 35 that meshes with the worm 24a.
- the worm wheel 35 is formed in a substantially disk shape by injection molding of a resin material, and has a tooth portion that meshes with the worm 24a on the outer peripheral surface thereof.
- a shaft hole 35a penetrating in the axial direction is formed in the shaft center of the worm wheel 35, and a rotation shaft 36 fixed to the bottom wall 21a and extending in parallel with the output shaft 30 is inserted into the shaft hole 35a and rotated.
- a worm wheel 35 is rotatably supported by the shaft 36 inside the gear frame 21. The rotation of the motor shaft 25 is decelerated and transmitted to the worm wheel 35 by the speed reduction mechanism 29 including the worm 24 a and the worm wheel 35.
- the motion conversion mechanism 31 is a first motion conversion member that converts the rotational motion of the pinion gear (output gear) 40 and the worm wheel 35 fixed to the base end portion of the output shaft 30 to a swing motion and transmits the swing motion to the pinion gear 40 ( Hereinafter, it has a wide-angle motion converting member) 41, and a holding plate 42 that connects the pinion gear 40 and the motion converting member 41 so as to be swingable with respect to each other.
- the motion conversion member 41 includes a sector gear portion 41a that meshes with the pinion gear 40 and an arm portion 41b that is connected to the worm wheel 35, and is formed into a flat plate shape from a metal material such as a steel plate.
- the motion converting member 41 is disposed closer to the gear cover 27 than the worm wheel 35.
- a connecting shaft 43 is fixed to the arm portion 41 b of the motion converting member 41, and the connecting shaft 43 is rotatably assembled to one of a pair of first connecting holes 50 described later formed in the worm wheel 35. ing. That is, the motion conversion member 41 and the worm wheel 35 are rotatably connected to each other by the connecting shaft 43 provided at a position shifted in the radial direction from the axial center of the worm wheel 35.
- the pinion gear 40 is a spur gear, and is fixed to the base end portion of the output shaft 30 and rotated integrally with the output shaft 30.
- the pinion gear 40 is disposed on the same plane as the motion converting member 41 and meshes with a sector gear portion 41a formed of a substantially fan-shaped spur gear.
- the holding plate 42 is formed in a flat plate shape by a metal material such as a steel plate.
- the holding plate 42 is disposed closer to the gear cover 27 than the pinion gear 40 and the motion conversion member 41, and extends between the pinion gear 40 and the sector gear portion 41a.
- a gear shaft 44 extending in parallel with the output shaft 30 and the connecting shaft 43 is rotatably inserted into one end portion of the holding plate 42, and the gear shaft 44 is fixed to the center of the sector gear portion 41a.
- the output shaft 30 is rotatably inserted into the other end portion of the holding plate 42.
- sliding contact members 45 that are slidably abutted against the inner surface of the gear cover 27 are mounted on the base end portions of the output shaft 30, the connecting shaft 43, and the gear shaft 44, respectively.
- the sliding contact member 45 is formed in a cap shape by an elastic material such as rubber, and is assembled in a compressed state between the base end surfaces of the shafts 30, 43, 44 and the inner surface of the gear cover 27. Due to the elastic force of the sliding contact member 45, the shafts 30, 43, 44 are urged in the axial direction toward the bottom wall 21 a side of the gear frame 21, and the axial direction of each member housed inside the gear frame 21 The backlash is suppressed.
- the worm wheel 35 is rotated by the motor body 11, and the connecting shaft 43 fixed to the arm portion 41 b of the motion conversion member 41 is rotated together with the worm wheel 35. It is rotated around 36. Then, the gear shaft 44 fixed to the sector gear portion 41a of the motion converting member 41 is swung around the output shaft 30, and the output shaft 30 is reciprocally swung at a predetermined swing angle by the engagement of the sector gear portion 41a and the pinion gear 40. Moved.
- the first motion conversion mechanism (hereinafter referred to as a wide-angle type motion conversion mechanism) 31 having a differential gear structure converts the rotational motion of the motor body 11 into a swing motion through the speed reduction mechanism 29, and outputs it to the output shaft 30. Then, the wiper member is reciprocally swung between a predetermined swinging range, that is, between both inversion positions set in advance.
- FIG. 3 is a plan view of the worm wheel.
- FIG. 4 is a rear view showing the internal structure of the wiper motor shown in FIG. 1, and the gear frame 21 is not shown.
- the worm wheel 35 has a pair of first connection holes (hereinafter referred to as a wide-angle connection hole) 50 and a pair of second connection holes (hereinafter referred to as a narrow-angle connection) at positions shifted in the radial direction from the axial center C thereof. , Each of which is formed to open toward one end side in the axial direction toward the gear cover 27 side.
- Each of the connecting holes 50 and 51 has a bottomed circular shape with the other axial end closed, and the connecting holes 50 and 51 have substantially the same shape.
- the pair of wide-angle connection holes 50 are formed so as to be shifted in the circumferential direction from positions symmetrical to each other with respect to the axial center C of the worm wheel 35, and the pair of wide-angle connection holes with the axial center C of the worm wheel 35.
- the angle ⁇ formed by the line segments connecting the 50 axial centers C1 to each other is set slightly smaller than 180 °.
- the pair of wide-angle connection holes 50 are formed so as to be shifted from the axial center C of the worm wheel 35 by a distance L in the radial direction.
- the shafts of the pair of wide-angle connection holes 50 are separated from the axial center C of the worm wheel 35.
- the distances to the center C1 are set equal to each other.
- the axial centers C1 of the pair of wide-angle connecting holes 50 are arranged on the circumference of the radius L around the axial center C of the worm wheel 35 so as to be separated from each other by an angle ⁇ in the circumferential direction. .
- the pair of narrow-angle connection holes 51 are formed at positions symmetrical to each other with respect to the axial center C of the worm wheel 35, and the pair of narrow-angle connection holes 51 with the axial center C of the worm wheel 35.
- the angle ⁇ formed by the line segments connecting the respective axis centers C2 to each other is set to approximately 180 °.
- the pair of narrow-angle connection holes 51 are formed so as to be shifted in the radial direction from the axial center C of the worm wheel 35 by a distance M, and the pair of narrow-angle connection holes 51 are separated from the axial center C of the worm wheel 35.
- the distances to the axial center C2 are set equal to each other.
- the axial center C2 of the pair of narrow-angle connecting holes 51 is arranged on the circumference of the radius M centering on the axial center C of the worm wheel 35 and spaced apart from each other by the angle ⁇ . Yes.
- the distance M from the axial center C of the worm wheel 35 to the axial center C2 of the narrow angle connecting hole 51 is larger than the distance L from the axial center C of the worm wheel 35 to the axial center C1 of the wide angle connecting hole 50. It is set small.
- the wiper motor 10 shown in FIG. 1 is set to a motor that wipes the first swing range, that is, a wide-angle type motor, and a wide-angle type motor is provided by a connecting shaft 43 that is assembled in one of a pair of wide-angle connecting holes 50.
- the arm 41b of the motion conversion member 41 is rotatably connected to the worm wheel 35.
- the position of the output shaft 30 in the wiper motor 10 is set based on the wiping range of the wiper member, the position where the connecting hole 50 is formed, and the like.
- a substantially annular relay plate 54 arranged coaxially with the worm wheel 35 is attached to the end surface on the other axial end side of the worm wheel 35.
- the relay plate 54 is formed by punching a conductive plate, and a part of the circumferential direction is formed with a notch part 54a partly cut away from the outer peripheral part toward the radially inner side. .
- a connector unit 56 provided with a power supply circuit 55 for supplying a drive current to the motor main body 11 is attached to the gear frame 21 so as to be positioned between the motor main body 11 and the worm wheel 35.
- the connector unit 56 has a connector holding portion 56a connected to an external connector (not shown), and the power feeding circuit 55 is electrically connected to an in-vehicle battery or the like via the external connector.
- the power supply circuit 55 includes a pair of power supply terminals (not shown) that are electrically connected to the pair of brushes 19 of the motor body 11 and a pair of contacts that are slidably contacted with the relay plate 54 and electrically contacted with the relay plate 54. Plates 57a and 57b. As the worm wheel 35 rotates, the pair of contact plates 57a and 57b are switched between a short-circuit state that is electrically connected to each other via the relay plate 54 and a non-short-circuit state that interrupts the connection.
- one contact plate 57a is always in electrical contact with the relay plate 54, and when the other contact plate 57b is in electrical contact with the relay plate 54, a short circuit is established, and the other contact plate 57b is in contact with the relay plate. If it is located in the notch 54a of 54, it will be in a non short circuit state.
- a pair of wide-angle connection holes 50 are formed in the worm wheel 35, and the wiper switch is turned off by assembling the connection shaft 43 into the other wide-angle connection hole 50. It is also possible to automatically stop the wiper member at the other reversal position.
- the pair of wide-angle connecting holes 50 are formed so as to be shifted in the circumferential direction from positions symmetrical to each other with respect to the axial center C of the worm wheel 35 in consideration of meshing between the sector gear portion 41a and the pinion gear 40.
- FIG. 5 is a plan view showing a wiper motor for wiping the second swing range according to another embodiment of the present invention
- FIG. 6 is a sectional view taken along line BB in FIG.
- FIG. 7 is a rear view showing the internal structure of the wiper motor shown in FIG. 5, and the gear frame 61 is not shown. 5 to 7, the same members as those described above are denoted by the same reference numerals, and the description thereof is omitted.
- the motion conversion mechanism 62 provided in the wiper motor 60 converts the rotational motion of the lever member 63 fixed to the base end portion of the output shaft 30 and the worm wheel 35 into a swing motion and transmits the swing motion to the lever member 63.
- a connecting rod 64 as a motion converting member (hereinafter referred to as a narrow angle motion converting member).
- the connecting rod 64 is formed in a flat plate shape that extends between the worm wheel 35 and the lever member 63 by a metal material such as a steel plate.
- the connecting rod 64 is disposed closer to the gear cover 65 than the worm wheel 35, and one end of the connecting rod 64 is formed in one of the pair of narrow-angle connecting holes 51 of the worm wheel 35.
- a pivot shaft 43 that is pivotably assembled is fixed. That is, the connecting rod 64 and the worm wheel 35 are rotatably connected to each other by the connecting shaft 43 provided at a position shifted in the radial direction from the axial center of the worm wheel 35.
- the lever member 63 is disposed on the bottom wall 61 a side of the gear case 61 with respect to the connecting rod 64, and one end thereof is fixed to the base end portion of the output shaft 30 and is rotated integrally with the output shaft 30.
- a connecting shaft 66 extending parallel to the output shaft 30 and the connecting shaft 43 is rotatably inserted into the other end of the lever member 63, and the connecting shaft 66 is fixed to the other end of the connecting rod 64. 66, the other end of the connecting rod 64 is rotatably connected to the lever member 63.
- a sliding contact member 67 that is slidably abutted against the inner surface of the gear cover 65 is attached to the base end portions of the connecting shafts 43 and 66.
- the sliding contact member 67 is formed in a cap shape by a resin material, and is sandwiched between the base end surfaces of the connecting shafts 43 and 66 and the inner surface of the gear cover 65.
- the sliding contact member 67 allows the connecting shafts 34 and 66 to slide smoothly with respect to the gear cover 65.
- the wiper switch When the wiper switch is turned on to operate the wiper motor 60, the worm wheel 35 is rotated by the motor body 11 and the connecting rod 64 is swung around the output shaft 30, and the connecting rod 64 and the lever member 63 are moved. As a result of the connection, the output shaft 30 is reciprocally swung at a predetermined swing angle. That is, the second motion conversion mechanism (hereinafter referred to as a narrow-angle type motion conversion mechanism) 62 having a link structure converts the rotational motion of the worm wheel 35 into a swing motion and transmits it to the output shaft 30, and the wiper member is moved to a predetermined position. Is oscillated and driven between the predetermined reversal positions.
- a narrow-angle type motion conversion mechanism (hereinafter referred to as a narrow-angle type motion conversion mechanism) 62 having a link structure converts the rotational motion of the worm wheel 35 into a swing motion and transmits it to the output shaft 30, and the wiper member is moved to a predetermined position
- the wiper motor 60 shown in FIG. 5 is set to a motor that wipes a second swing range narrower than the first swing range, that is, a narrow-angle type motor, and one of the pair of narrow-angle connection holes 51.
- One end of a connecting rod 64 as a narrow-angle motion converting member is rotatably connected to the worm wheel 35 by the connecting shaft 43 assembled to the worm wheel 35.
- the position of the output shaft 30 in the narrow-angle type wiper motor 60 is set based on the wiping range of the wiper member, the formation position of the connecting hole 51, and the like, and deviates from the position of the output shaft 30 in the wide-angle type wiper motor 10. Has been placed. That is, the position of the output shaft 30 is shifted between the wide-angle type wiper motor 10 and the narrow-angle type wiper motor 60.
- a connector unit 56 is attached to the gear frame 61 so as to be positioned between the motor body 11 and the worm wheel 35.
- the contact position between the pair of contact plates 57a and 57b provided in the power supply circuit 55 of the connector unit 56 and the relay plate 54 is such that the contact plate 57b is positioned at the notch 54a when the wiper member is positioned at one reverse position.
- the wiper switch is turned OFF, the wiper member is automatically stopped at a predetermined stop position, that is, one reverse position.
- the pair of narrow-angle connecting holes 51 is formed in the worm wheel 35, and the wiper switch is turned off by assembling the connecting shaft 43 to the other narrow-angle connecting hole 51. It is also possible to automatically stop the wiper member at the other reverse position when it is done.
- the pair of narrow-angle connection holes 51 are formed at positions symmetrical to each other with respect to the axial center C of the worm wheel 35.
- the contact position between the pair of contact plates 57a, 57b and the relay plate 54 in the narrow-angle wiper motor 60 is the same as the contact position between the pair of contact plates 57a, 57b and the relay plate 54 in the wide-angle wiper motor 10. It is supposed to be arranged in. That is, in the wide-angle type wiper motor 10 and the narrow-angle type wiper motor 60, the contact positions of the pair of contact plates 57 a and 57 b and the relay plate 54 are arranged at positions equivalent to the assembly position of the motor body 11. ing.
- the wide-angle connecting hole 50 and the narrow-angle connecting hole 51 are formed in the worm wheel 35, so that the wide-angle wiper motor 10 and the narrow-angle wiper motor 60 share the worm wheel 35.
- the worm wheel 35 can be applied to a wiper motor having a different rotation angle or wiping angle of the output shaft 30 without using it separately.
- the worm wheel 35 can be made common to the wide angle type and the narrow angle type, so there is no need to prepare separate worm wheels 35 for the wide angle type and the narrow angle type. Can be reduced.
- the parts management of the worm wheel 35 is facilitated, and the mold replacement work is facilitated by reducing the number of molds and pieces for forming the worm wheel 35, thereby improving the productivity of the wiper motors 10 and 60 and reducing the cost. Can be achieved.
- the contact positions of the contact plates 57a and 57b and the relay plate 54 are arranged at positions equivalent to the assembly position of the motor body 11. .
- the connector unit 56 and the relay plate 54 can be shared by the wide angle type and the narrow angle type, and the types of the connector unit 56 and the relay plate 54 can be reduced. Accordingly, the parts management of the connector unit 56 and the relay plate 54 is facilitated, and the mold replacement work is facilitated by reducing the number of molds and pieces for molding the parts of the connector unit 56 and the relay plate 54, and the wiper motor 10. , 60 can improve productivity and reduce costs.
- the position of the output shaft 30 is shifted in the wide-angle type wiper motor 10 and the narrow-angle type wiper motor 60. Since the formation positions of the connection holes 50 and 51 are set based on the wiping range of the wiper member, the position of the output shaft 30, and the like, by shifting the position of the output shaft 30 between the wide angle type and the narrow angle type, Even when the contact positions of the contact plates 57a, 57b and the relay plate 54 are arranged at the same position, the wide-angle connecting hole 50 and the narrow-angle connecting hole 51 do not overlap each other, and the worm wheel It is possible to form a wide-angle connection hole 50 and a narrow-angle connection hole 51 in 35.
- the pair of wide-angle connecting holes 51 and the pair of narrow-angle connecting holes 52 are formed in the worm wheel 35.
- each of the connecting holes 50, 51 is at least a pair. It is sufficient that two or more pairs of connection holes 50 and 51 are formed. In that case, the wiping range of the wiper member can be changed in accordance with the vehicle type or the like by changing the positions of the connection holes 50 and 51 to which the connection shaft 43 is assembled.
- connection holes 50 and 51 can be arbitrarily changed in consideration of the wiping range of the wiper member, the position of the output shaft 30, and the like.
- the distance M from the axial center C of the worm wheel 35 to the axial center C2 of the narrow angle connecting hole 51 is set to the axial center of the worm wheel axial center C to the wide angle connecting hole 50.
- the distance M may be set larger than the distance L, or the distance M and the distance L may be set equal.
- the wiper motors 10 and 60 of the present invention are not limited to those used in a rear window device of a vehicle such as an automobile, and may be used in a wiper device mounted on an aircraft or a ship.
- the motor body 11 is not limited to a motor with a brush, and for example, a brushless motor or the like may be used.
- the wiper motor is used to swing and drive a wiper member for wiping a window glass provided in an automobile or the like to improve visibility of a driver or the like.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Gear Transmission (AREA)
Abstract
Description
Claims (5)
- モータ本体と、当該モータ本体の回転運動を第一の揺動範囲または第一の揺動範囲よりも狭い第二の揺動範囲を有する揺動運動に変換して出力軸に伝達する運動変換機構とを有するワイパモータであって、
前記モータ本体により回転駆動されるウォームと、
その軸中心から径方向にずれた位置において、第一の揺動範囲の基準となる少なくとも一対の第一の連結孔および第二の揺動範囲の基準となる少なくとも一対の第二の連結孔がそれぞれ軸方向一端側に開口して形成され、前記ウォームに噛み合うウォームホイールと、
前記出力軸と一体に回動する出力ギヤに噛み合い前記出力軸を第一の揺動範囲で揺動させる第一の運動変換部材を備えた前記運動変換機構を有する場合には、前記第一の運動変換部材を前記ウォームホイールに形成された前記第一の連結孔のいずれか1つに回動自在に連結し、前記出力軸と一体に回動するレバー部材に回動自在に連結され前記出力軸を第二の揺動範囲で揺動させる第二の運動変換部材を備えた前記運動変換機構を有する場合には、前記第二の運動変換部材を前記ウォームホイールに形成された前記第二の連結孔のいずれか1つに回動自在に連結する連結軸と、を有することを特徴とするワイパモータ。 - 請求項1記載のワイパモータにおいて、
前記電動モータに電気的に接続される給電回路と、
前記ウォームホイールの軸方向他端側の端面に取り付けられ、前記ウォームホイールの回転に伴って、前記給電回路に設けられた複数のコンタクトプレートを相互に電気的に接続する短絡状態と接続を遮断する非短絡状態とに切り換えるリレープレートとを有し、
前記出力軸を第一の揺動範囲で揺動する場合と前記出力軸を第二の揺動範囲で揺動する場合とにおいて、前記リレープレートと前記コンタクトプレートとの接点位置を前記電動モータの組み付け位置に対して同等の位置に配置するようにしたことを特徴とするワイパモータ。 - 請求項1記載のワイパモータにおいて、前記出力軸を第一の揺動範囲で揺動する場合と前記出力軸を第二の揺動範囲で揺動する場合とにおいて、前記出力軸の位置をずらして配置するようにしたことを特徴とするワイパモータ。
- 請求項1記載のワイパモータにおいて、前記ウォームホイールの軸中心と一対の前記第一の連結孔の軸中心とをそれぞれ結ぶ線分が互いになす角度と、前記ウォームホイールの軸中心と一対の前記第二の連結孔の軸中心とをそれぞれ結ぶ線分が互いになす角度とが相違していることを特徴とするワイパモータ。
- 請求項1記載のワイパモータにおいて、前記ウォームホイールの軸中心から前記第一の連結孔の軸中心までの距離と、前記ウォームホイールの軸中心から前記第二の連結孔の軸中心までの距離とが相違していることを特徴とするワイパモータ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US13/991,925 US9182020B2 (en) | 2010-12-10 | 2011-11-29 | Wiper motor |
JP2012547795A JP6172941B2 (ja) | 2010-12-10 | 2011-11-29 | ワイパモータ |
EP11847428.7A EP2639119B1 (en) | 2010-12-10 | 2011-11-29 | Wiper motor |
CN201180058455.3A CN103249607B (zh) | 2010-12-10 | 2011-11-29 | 刮水器电机 |
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JP2010-276021 | 2010-12-10 | ||
JP2010276021 | 2010-12-10 |
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JP2015016805A (ja) * | 2013-07-11 | 2015-01-29 | 株式会社ミツバ | ワイパモータ |
US9837776B2 (en) | 2013-07-11 | 2017-12-05 | Mitsuba Corporation | Electric motor |
JP7570967B2 (ja) | 2021-04-16 | 2024-10-22 | 株式会社ミツバ | 減速機構付きモータ装置 |
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DE102009014312A1 (de) * | 2009-03-25 | 2010-09-30 | Valeo Systèmes d'Essuyage | Elektromotorischer Hilfsantrieb, insbesondere Wischerantrieb |
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US20160322921A1 (en) | 2013-12-25 | 2016-11-03 | Mitsuba Corporation | Brushless motor, wiper apparatus, motor apparatus, and control method for motor apparatus |
JP6634372B2 (ja) * | 2014-07-15 | 2020-01-22 | 株式会社ミツバ | ブラシレスワイパモータ |
EP3285373B1 (en) * | 2015-04-13 | 2020-11-11 | Mitsuba Corporation | Motor with speed reducer, and rear wiper motor |
CN105041998A (zh) * | 2015-06-19 | 2015-11-11 | 江南大学 | 一种偏心轮-扇形连杆直线往复机构 |
DE102015122094A1 (de) * | 2015-12-17 | 2017-06-22 | Valeo Systèmes d'Essuyage | Wischermotor und Verfahren zum Herstellen eines Wischermotors |
FR3057329B1 (fr) * | 2016-10-07 | 2018-11-16 | Valeo Systemes D'essuyage | Roue dentee pour un motoreducteur d’essuie-glace |
DE102016124039A1 (de) * | 2016-12-12 | 2018-06-14 | Valeo Systèmes d'Essuyage | Wischermotor und Verfahren zum Herstellen eines Wischermotors |
CN110582434B (zh) * | 2017-04-24 | 2023-06-20 | 西门子交通有限公司 | 用于交通工具的减小弧的风挡刮水器系统 |
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Also Published As
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EP2639119B1 (en) | 2019-05-01 |
EP2639119A1 (en) | 2013-09-18 |
JPWO2012077540A1 (ja) | 2014-05-19 |
US9182020B2 (en) | 2015-11-10 |
US20130255408A1 (en) | 2013-10-03 |
CN103249607B (zh) | 2016-04-20 |
EP2639119A4 (en) | 2018-05-09 |
CN103249607A (zh) | 2013-08-14 |
JP6172941B2 (ja) | 2017-08-02 |
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