WO2012029608A1 - ワイパモータ - Google Patents
ワイパモータ Download PDFInfo
- Publication number
- WO2012029608A1 WO2012029608A1 PCT/JP2011/069069 JP2011069069W WO2012029608A1 WO 2012029608 A1 WO2012029608 A1 WO 2012029608A1 JP 2011069069 W JP2011069069 W JP 2011069069W WO 2012029608 A1 WO2012029608 A1 WO 2012029608A1
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- WO
- WIPO (PCT)
- Prior art keywords
- gear
- motion conversion
- worm wheel
- output shaft
- shaft
- Prior art date
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Classifications
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- 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
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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
- B60S1/16—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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- 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
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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
- B60S1/56—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens
- B60S1/58—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens for rear windows
- B60S1/583—Cleaning windscreens, windows or optical devices specially adapted for cleaning other parts or devices than front windows or windscreens for rear windows including wiping devices
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- 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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/039—Gearboxes for accommodating worm gears
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- 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
-
- 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
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
-
- 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
- H02K7/08—Structural association with bearings
- H02K7/081—Structural association with bearings specially adapted for worm gear drives
Definitions
- the present invention relates to a wiper motor for driving a wiper member provided in an automobile or the like, and more particularly to a wiper motor provided with a motion conversion mechanism that converts rotational motion into swing motion and transmits it.
- a wiper motor is used as a drive source for driving a wiper member.
- the wiper motor has an electric motor such as a motor with a brush, and a gear reduction mechanism and a motion conversion mechanism are accommodated inside a gear case attached to the electric motor.
- the reduction mechanism includes a worm rotated by an electric motor and a worm wheel engaged with the worm, and the rotation of the electric motor is reduced by the reduction mechanism and transmitted to the worm wheel.
- the wiper motor includes a narrow angle type (link type) in which the swing range of the wiper member is narrow (link type) and a wide angle type (differential 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 pivoting lever fixed to the proximal end of the output shaft, and a connecting rod that transforms the rotational motion of the worm wheel into a pivoting motion and transmits it to the pivoting lever. have.
- the connecting rod is rotatably connected to the worm wheel at a position where one end thereof is radially offset from the axial center of the worm wheel, and the other end is rotatably connected to the rotating lever.
- the motion conversion mechanism provided in the wide-angle type wiper motor has a pinion gear fixed to the base end of the output shaft, and a motion conversion member for converting the rotational motion of the worm wheel into rocking motion and transmitting it to the pinion gear.
- the motion conversion member has a sector gear portion at one end rotatably coupled to the worm wheel at a position deviated in the radial direction from the axial center of the worm wheel at the other end.
- a holding plate is provided which pivotally connects the gear shaft provided at the axial center of the sector gear portion and the output shaft, and the meshing state between the pinion gear and the sector gear portion is maintained.
- the wide-angle type wiper motor has a problem that the number of parts is large due to its structure, and the rattling of the output shaft in the rotational direction is large as compared with the narrow-angle type wiper motor.
- the clearance of the sliding part of each member, the backlash in the engagement between the pinion gear and the sector gear, and the engagement between the pinion gear and the sector gear due to the play in the thrust direction of each member The occurrence of misalignment may be mentioned.
- the contact area between the gear frame (gear case) and the holding plate (rocking plate) and the contact area between the worm wheel and the motion conversion member (power conversion member) are sufficiently wide. Since it is not taken, it is not possible to sufficiently suppress the occurrence of inclination in the motion conversion member, the holding plate, the pinion gear (output gear) and the like. Therefore, when each member is inclined due to a reaction force of engagement between the pinion gear and the sector gear portion, the engagement between the pinion gear and the sector gear portion is deviated, and the backlash in the rotational direction of the output shaft is large.
- An object of the present invention is to suppress rattling in the rotational direction of an output shaft.
- the wiper motor according to the present invention is a wiper motor including an electric motor and a movement converting mechanism for converting the rotational movement of the electric motor into a rocking movement and transmitting the rocking movement to the output shaft, and a worm rotated by the electric motor
- a reduction mechanism that includes a worm wheel that meshes with a worm and that decelerates the rotation of the electric motor and transmits the rotation to the motion conversion mechanism, a reduction mechanism storage chamber that is attached to the electric motor and that houses the reduction mechanism, and the motion conversion mechanism
- a motion conversion mechanism accommodation chamber for accommodating the motion conversion mechanism accommodation chamber, and a support surface disposed on the same plane as an axial end surface of the worm wheel rotatably accommodated in the reduction
- the holding plate is disposed closer to the opening side of the gear frame than the pinion gear and the motion conversion member, and the pinion gear and the motion conversion member are in contact with the support surface of the gear frame. It is characterized in that it is slidably butted.
- the wiper motor according to the present invention has a connecting shaft that rotatably connects the worm wheel and the motion conversion member at a position radially offset from the axis of the worm wheel, and the connecting shaft and the gear shaft A sliding contact member slidably abutted against the inner surface of the gear cover is mounted at a proximal end portion with the output shaft.
- the axial end face of the worm wheel and the support surface of the gear frame are on the same plane, and the support surface is formed over the entire range facing the pinion gear and the motion conversion member in the bottom wall of the motion conversion mechanism accommodation chamber.
- the contact area between the gear frame or the worm wheel and each member of the motion conversion mechanism can be increased.
- the play in the thrust direction of each member is suppressed, and the inclination of each member is suppressed, so that the meshing between the pinion gear and the sector gear portion is prevented, and the play in the rotational direction of the output shaft is suppressed.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG. It is a top view showing a wiper motor under a reversal position.
- FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 3; It is a top view which shows the inner surface of a gear frame.
- the 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 has a motor body (electric motor) 11 and a gear unit portion 12 provided with a motion conversion mechanism for converting rotational motion of the motor body 11 into rocking motion and transmitting it.
- the motor body 11 uses a brushed DC motor, and includes a motor case (yoke) 13 formed in a bottomed cylindrical shape by pressing a thin steel plate or the like.
- a motor case (yoke) 13 formed in a bottomed cylindrical shape by pressing a thin steel plate or the like.
- a plurality of arc-shaped permanent magnets 14 magnetized to the N pole and the S pole inward in the radial direction are fixed to be opposed to each other.
- an armature 15 is rotatably accommodated in the motor case 13 so as to face each permanent magnet 14 with a minute gap, and a plurality of coils 16 are wound around the armature 15.
- a motor shaft 17 penetrates and is fixed to the rotation center of the armature 15.
- a cylindrical commutator 18 is fixed to the motor shaft 17 so as to be 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 in sliding contact with the outer peripheral surface of the commutator 18, and a drive current is supplied to the coil 16 through the brushes 19 and the commutator 18, whereby an electromagnetic torque in the rotational direction is generated in the armature 15.
- the motor shaft 17 is rotationally driven at a predetermined rotational speed.
- 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 opened to the motor case 13 side, and the gear frame 21 is fixed to the motor case 13 by the fastening screw 22 in a state where the open end faces of the gear frame 21 abut each other.
- the other axial end of the motor shaft 17 is inserted into the gear frame 21.
- a worm 23 having a helical tooth portion is integrally formed on the outer peripheral surface of the other axial end of the motor shaft 17 ing.
- the gear frame 21 is formed by an aluminum die-cast in a bottomed shape that opens on the side orthogonal to the axial direction of the motor shaft 17, and the gear case 24 closes the opening of the gear frame 21.
- a reduction mechanism 26 that decelerates and transmits the rotation of the motor shaft 17, and a motion conversion mechanism 29 that converts the rotational motion of the reduction mechanism 26 into a swing motion and transmits it to the output shaft 28.
- a speed reduction mechanism housing chamber 27 in which the speed reduction mechanism 26 is housed and a motion conversion mechanism housing chamber 30 in which the motion conversion mechanism 29 is housed are formed.
- the motion conversion mechanism accommodation chamber 30 is formed closer to the gear cover 24 than the reduction gear mechanism accommodation chamber 27 and communicates with the reduction gear mechanism accommodation chamber 27 and extends on a plane parallel to the bottom wall 27 a of the reduction gear mechanism accommodation chamber 27. It has 30a.
- the bottom wall 30a of the motion conversion mechanism storage chamber 30 is provided closer to the gear cover 24 than the bottom wall 27a of the reduction gear storage chamber 27, and the bottom wall 30a of the motion conversion mechanism storage chamber 30 and the bottom wall 27a of the reduction gear storage chamber 27 Are formed in steps in parallel with each other.
- the wiper motor 10 shown in FIG. 1 is a plan view with the gear cover 24 removed, and shows the internal structure of the gear frame 21.
- the gear cover 24 is formed in a predetermined shape by a steel plate or the like, and the wiper motor 10 is fixed to the vehicle body at a bracket portion (not shown) integrally provided on the gear cover 24.
- the gear frame 21 is formed to have a bottom by aluminum die casting.
- the present invention is not limited to this, and the gear frame 21 may be formed of resin or another material.
- the output shaft 28 is formed of a metal round bar made of steel or the like, and the axial direction of the output shaft 28 is disposed in the direction orthogonal to the axial direction of the motor shaft 17, ie, the direction orthogonal to the bottom wall 30 a ing.
- the output shaft 28 is accommodated at the proximal end side in the motion conversion mechanism accommodation chamber 30, and the distal end side protrudes and extends outward of the gear frame 21, and penetrates the bottom wall 30a of the motion conversion mechanism accommodation chamber 30. It is provided.
- a substantially cylindrical shaft holding portion 31 protruding outward of the gear frame 21 along the outer peripheral surface of the output shaft 28 is integrally formed on the bottom wall 30 a of the motion conversion mechanism accommodation chamber 30.
- the tip of the output shaft 28 projects 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 tip of the output shaft 28 There is.
- a resin-made bearing member 33 is provided between the inner peripheral surface of the shaft holding portion 31 and the outer peripheral surface of the output shaft 28, and the output shaft 28 is rotatably supported by the shaft holding portion 31 via the bearing member 33.
- a seal member 34 is attached to the tip end portion of the shaft holding portion 31 to prevent rainwater, dust, and the like from entering the inside of the gear frame 21.
- the speed reduction mechanism 26 includes a worm 23 rotated by the motor body 11 and a worm wheel 35 engaged with the worm 23.
- the worm wheel 35 is formed into a substantially disc shape by injection molding of a resin material, and the outer peripheral surface thereof is provided with a tooth portion that engages with the worm 23.
- a rotary shaft 36 fixed to the bottom wall 27a of the reduction gear mechanism chamber 27 and extending in parallel to the output shaft 28 is inserted through the axial center of the worm wheel 35. It is rotatably supported within 27.
- the rotation of the motor main body 11 is decelerated by the reduction mechanism 26 composed of the worm 23 and the worm wheel 35 and transmitted to the worm wheel 35.
- a cylindrical boss portion 35a protruding toward the bottom wall 27a along the outer peripheral surface of the rotary shaft 36 is provided at one axial end face of the worm wheel 35, and the worm wheel 35 is a bottom wall 27a at the boss portion 35a. Butted against the inner surface of The axial dimension of the worm wheel 35 is substantially the same as the depth dimension of the reduction gear mechanism chamber 27, and the axial direction other end surface 35 b of the worm wheel 35 and the inner surface of the bottom wall 30 a of the motion conversion mechanism chamber 30. And the support surface 37 formed by
- the motion conversion mechanism 29 includes a pinion gear 40 fixed to the base end of the output shaft 28, a motion conversion member 41 for converting rotational motion of the worm wheel 35 into rocking motion and transmitting it to the pinion gear 40, and motion conversion with the pinion gear 40.
- a holding plate 42 pivotally connects the member 41 with 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 connected to the worm wheel 35, and is formed in a flat plate shape from a metal material such as a steel plate.
- the motion conversion member 41 is disposed closer to the gear cover 24 than the worm wheel 35, and extends parallel to the support surface 37 of the gear frame 21 between the pinion gear 40 and the worm wheel 35.
- the side surface of the motion conversion member 41 on the bottom wall 27 a, 30 a side is butted against the axial other end surface 35 b of the worm wheel 35 and the support surface 37 of the gear frame 21.
- a connection shaft 43 rotatably fixed to any one of the plurality of connection holes 35 c formed in the worm wheel 35 is fixed to an end of the arm portion 41 b of the motion conversion member 41.
- 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 deviated from the axial center C2 of the worm wheel 35 in the radial direction.
- the pinion gear 40 is a spur gear and is fixed to the proximal end of the output shaft 28 so as to rotate integrally with the output shaft 28.
- the pinion gear 40 is disposed on the same plane as the motion conversion member 41, and the end face on the bottom wall 30a side thereof is slidably butted against the support surface 37 of the gear frame 21 and is formed of a substantially sector-shaped spur gear. It meshes with the sector gear portion 41a.
- 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 24 than the pinion gear 40 and the motion conversion member 41, and extends parallel to the support surface 37 of the gear frame 21 between the pinion gear 40 and the sector gear portion 41a.
- the side surfaces on the bottom walls 27 a and 30 a side of the holding plate 42 slide on the end surface on the gear cover 24 side of the pinion gear 40 and the side surface on the gear cover 24 side of the motion conversion member 41 in the abutment surface parallel to the support surface 37 of the gear frame 21. It is hit freely.
- a gear shaft 44 extending in parallel to the output shaft 28 and the connecting shaft 43 is rotatably inserted in one end of the holding plate 42, and the gear shaft 44 is fixed at the axial center of the sector gear portion 41a.
- the front end surface of the gear shaft 44 is slidably butted against the support surface 37 of the gear frame 21 or the other axial end surface 35 b of the worm wheel 35.
- the output shaft 28 is rotatably inserted in the other end of the holding plate 42.
- the gear shaft 44 is pivotally connected to the output shaft 28 by the holding plate 42, and the pinion gear 40 and the sector gear portion 41a are held in mesh with each other. That is, the meshing portion G between the pinion gear 40 and the sector gear portion 41a is supported between the support surface 37 of the gear frame 21 and the holding plate 42, so that the meshing between the pinion gear 40 and the sector gear portion 41a is prevented ing.
- the connecting shaft 43 fixed to the arm portion 41 b of the motion conversion member 41 is rotated about the rotation shaft 36 together with the worm wheel 35.
- the gear shaft 44 fixed to the sector gear portion 41a of the motion conversion member 41 is swung about the output shaft 28, and the meshing of the sector gear portion 41a and the pinion gear 40 causes the output shaft 28 to swing back and forth within a predetermined angle range. Be done. That is, the rotational movement of the worm wheel 35 is converted to the rocking movement by the movement conversion mechanism 29 and transmitted to the output shaft 28, and the wiper member is in a predetermined rocking range, that is, between the predetermined stop position and reverse position. It is rocked and driven.
- a sliding contact member 45 which is slidably butted against the inner surface of the gear cover 24 is mounted. , 44 is abutted slidably on the inner surface of the gear cover 24 via the sliding contact member 45.
- the sliding contact member 45 is formed in a cap shape by an elastic material which is elastically deformable in the axial direction of each of the shafts 28, 43, 44.
- the sliding contact members 45 mounted on the respective shafts 28, 43, 44 are assembled in a state of being axially compressed between the base end surfaces of the respective shafts 28, 43, 44 and the inner surface of the gear cover 24, On each of the shafts 28, 43, 44, an elastic force by the sliding contact member 45 is exerted axially toward the bottom walls 27a, 30a.
- the sliding contact members 45 mounted on the connecting shaft 43 and the gear shaft 44 are assembled in a state of being axially compressed between the side surface of the holding plate 42 on the gear cover 24 side and the inner surface of the gear cover 24 At both ends of the holding plate 42, an elastic force by the sliding contact member 45 is axially applied toward the bottom walls 27a and 30a.
- the end face of the pinion gear 40 on the side of the gear cover 24 and the side face of the sector gear portion 41 a on the side of the gear cover 24 abut against the inner surface of the gear cover 24 via the holding plate 42 and the sliding contact member 45.
- the elastic force of the sliding contact member 45 urges the members contained in the gear frame 21, that is, the members constituting the reduction mechanism 26 and the motion conversion mechanism 29 toward the bottom walls 27 a and 30 a of the gear frame 21. It is axially pressed between the walls 27 a, 30 a and the gear cover 24. As a result, axial movement of each member accommodated in the gear frame 21 is strongly restricted, and axial rattling is suppressed, so that rattling of each member inside the gear frame 21 is prevented. .
- a plurality of grease grooves 46 are formed in each sliding contact member 45 at the abutting surface with the inner surface of the gear cover 24.
- Four grease grooves 46 are provided at equal intervals (about 90 ° intervals) along the outer peripheral portion of the sliding contact member 45, and have a substantially semicircular shape opening on the side of the gear cover 24 and radially outward.
- Grease (not shown) is applied to the inner surface of the gear cover 24 so that the sliding contact member 45 can slide smoothly with respect to the gear cover 24.
- Grease as a grease reservoir groove formed in each sliding contact member 45 The grooves 46 hold grease.
- the position of the output shaft 28 is such that the axial center C1 is closer to the motor case 13 in the axial direction of the motor shaft 17 than the axial center C2 of the worm wheel 35 and the axial line of the motor shaft 17 than the axial center C2 of the worm wheel 35 It is set to be placed at a position away from C. That is, when the wiper motor 10 is disposed on the vehicle body with the axial direction of the motor shaft 17 horizontal, the output shaft 28 is disposed on the upper side of the motor body 11 as much as possible. The position of the output shaft 28 is set such that the motor case 13 is prevented from protruding to one side in the horizontal direction. Thereby, the layout property of the wiper motor 10 is improved, and the downsizing of the wiper motor 10 is achieved.
- FIGS. 3 and 4 show the wiper motor 10 when the wiper member is at the reverse position.
- FIG. 3 is a plan view showing the wiper motor under the reverse position
- FIG. 4 is a cross-sectional view taken along the line B--B in FIG.
- FIG. 5 is a plan view showing the inner surface of the gear frame.
- the gear shaft 44 is located radially outward of the worm wheel 35, and the sector gear portion 41a of the motion conversion member 41 is a motion conversion mechanism storage chamber. It is arrange
- the motion conversion member 41 has the sector gear portion 41a slidably butted against the support surface 37 of the gear frame 21, and the arm portion 41b slidably butted against the other end surface 35b of the worm wheel 35 in the axial direction.
- a meshing portion G between the pinion gear 40 and the sector gear portion 41 a is supported between the support surface 37 of the gear frame 21 and the holding plate 42.
- the gear shaft 44 is located radially inward of the worm wheel 35, and the sector gear portion 41 a of the motion conversion member 41 is the worm wheel 35. It is arranged to face the.
- the motion conversion member 41 has a sector gear portion 41 a and an arm portion 41 b slidably butted against the other axial end surface 35 b of the worm wheel 35, and a meshing portion G between the pinion gear 40 and the sector gear portion 41 a is the gear frame 21. It is supported between the support surface 37 and the holding plate 42.
- the axial center C3 of the gear shaft 44 is moved along the movement path T shown in FIG. 1, and the sector gear portion 41a of the motion conversion member 41 is moved. It is swung about an axial center C1 of the output shaft 28.
- the motion conversion member 41 is the shaft of the support surface 37 of the gear frame 21 and the worm wheel 35. It slides in the state abutted to direction other end side 35b.
- the contact area between the motion conversion member 41 and the support surface 37 of the gear frame 21 and the contact area between the motion conversion member 41 and the other axial end surface 35b of the worm wheel 35 can be increased. It is possible to suppress the occurrence of inclination in 41 and the generation of axial play in the motion conversion member 41.
- the gear shaft 44 is slid in a state of being abutted against the axial other end surface 35 b of the worm wheel 35 or the support surface 37 of the gear frame 21, generation of axial rattling of the gear shaft 44 can be suppressed. Can.
- the support surface 37 of the gear frame 21 is, as shown in FIG. 5, the entire range facing the pinion gear 40 and the motion conversion member 41 in the bottom wall 30a of the motion conversion mechanism accommodation chamber 30 (the range shown by dots in FIG. Is formed. That is, the pinion gear 40 and the motion conversion member 41 abut against the support surface 37 in the entire range opposed to the bottom wall 30a.
- the contact area between the pinion gear 40 and the support surface 37 of the gear frame 21 and the contact area between the motion conversion member 41 and the support surface 37 of the gear frame 21 can be increased. It is possible to suppress the occurrence of inclination and the generation of axial play in the pinion gear 40 and the motion conversion member 41.
- the cap-shaped sliding contact member 45 is individually mounted on each of the output shaft 28, the connecting shaft 43, and the gear shaft 44.
- the present invention not limited to this, since the distance between the output shaft 28 and the gear shaft 44 remains unchanged regardless of the drive of the wiper motor 10, the sliding contact members 45 mounted on the respective shafts 28, 44 may be integrated. You can also.
- a cover member (not shown) is provided to cover the holding plate 42 for holding the shafts 28 and 44, and the sliding members 45 corresponding to the shafts 28 and 44 are integrated with the cover member. Let's do it.
- the sliding contact member 45 can be attached to each of the shafts 28 and 44 at one time, and the assembly procedure of the wiper motor 10 can be simplified.
- the motor main body 11 is not limited to the brushed motor, and another electric motor such as a brushless motor may be used.
- the wiper motor 10 of the present invention is not limited to one used in a rear window device of a vehicle such as a car, but may be used in a wiper device provided on an aircraft, a ship or the like.
- the wiper motor is used to drive a wiper member forming a wiper device provided in a vehicle such as a car and wipe the window glass.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Gear Transmission (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims (3)
- 電動モータと当該電動モータの回転運動を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備えるワイパモータであって、
前記電動モータにより回転されるウォーム、および前記ウォームに噛み合うウォームホイールを備え、前記電動モータの回転を減速して前記運動変換機構に伝達する減速機構と、
前記電動モータに取り付けられ、前記減速機構を収容する減速機構収容室と前記運動変換機構を収容する運動変換機構収容室とが形成されるとともに、前記減速機構収容室に回転自在に収容された前記ウォームホイールの軸方向端面と同一平面上に配置される支持面が前記運動変換機構収容室の底壁に形成される有底状のギヤフレームと、
前記ギヤフレームの開口部を閉塞するギヤカバーと、
前記出力軸の基端部に固定されて前記ギヤフレームの支持面に摺動自在に突き当てられ、前記出力軸と一体に回転するピニオンギヤと、
前記ピニオンギヤに噛み合うセクタギヤ部を備え、前記ウォームホイールの軸心から径方向にずれた位置において前記ウォームホイールに回動自在に連結されるとともに、前記ギヤフレームの支持面および前記ウォームホイールの軸方向端面に摺動自在に突き当てられる運動変換部材と、
前記セクタギヤ部の軸心に設けられた歯車軸と前記出力軸とを揺動自在に連結する保持プレートとを有し、
前記ギヤフレームの支持面は、前記運動変換機構収容室の底壁において前記ピニオンギヤおよび前記運動変換部材と対向する範囲全体に形成され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、前記保持プレートは前記ピニオンギヤおよび前記運動変換部材よりも前記ギヤフレームの開口側に配置され、前記ギヤフレームの支持面に平行な突き当て面において前記ピニオンギヤおよび前記運動変換部材に摺動自在に突き当てられ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心から径方向にずれた位置において前記ウォームホイールと前記運動変換部材とを回動自在に連結する連結軸を有し、前記連結軸と前記歯車軸と前記出力軸との基端部には前記ギヤカバーの内面に摺動自在に突き当てられる摺接部材が装着されていることを特徴とするワイパモータ。
Priority Applications (5)
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ES11821625T ES2728469T3 (es) | 2010-09-02 | 2011-08-24 | Motor de limpiaparabrisas |
EP11821625.8A EP2597332B1 (en) | 2010-09-02 | 2011-08-24 | Wiper motor |
CN201180042316.1A CN103081309B (zh) | 2010-09-02 | 2011-08-24 | 雨刷马达 |
JP2012531818A JP5766193B2 (ja) | 2010-09-02 | 2011-08-24 | ワイパモータ |
US13/819,798 US9712018B2 (en) | 2010-09-02 | 2011-08-24 | Wiper motor |
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US (1) | US9712018B2 (ja) |
EP (1) | EP2597332B1 (ja) |
JP (1) | JP5766193B2 (ja) |
CN (1) | CN103081309B (ja) |
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Cited By (3)
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JP2014184771A (ja) * | 2013-03-22 | 2014-10-02 | Mitsuba Corp | ワイパモータ |
JP2019123399A (ja) * | 2018-01-17 | 2019-07-25 | 株式会社デンソー | 減速機構付モータ |
JP2020159471A (ja) * | 2019-03-26 | 2020-10-01 | 株式会社ミツバ | 運動変換機構、モータ、及びワイパモータ |
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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 |
CN106555534A (zh) * | 2015-09-30 | 2017-04-05 | 德昌电机(深圳)有限公司 | 驱动机构、车窗驱动机构及使用该车窗驱动机构的车辆 |
DE102015122094A1 (de) * | 2015-12-17 | 2017-06-22 | Valeo Systèmes d'Essuyage | Wischermotor und Verfahren zum Herstellen eines Wischermotors |
GB2545754B (en) * | 2015-12-21 | 2020-10-28 | Tata Motors European Technical Ct Plc | Apparatus for powering windscreen wipers |
JP6759158B2 (ja) * | 2017-06-15 | 2020-09-23 | 株式会社ミツバ | 減速機構付モータ |
CN110165828B (zh) * | 2019-06-19 | 2020-12-11 | 湖南奥通工控科技有限公司 | 一种伺服电机 |
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- 2011-08-24 ES ES11821625T patent/ES2728469T3/es active Active
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JP2000341906A (ja) | 1999-05-26 | 2000-12-08 | Asmo Co Ltd | モータ装置及び車両用ワイパ装置 |
JP2006088777A (ja) | 2004-09-21 | 2006-04-06 | Mitsuba Corp | ワイパモータ |
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JP5766193B2 (ja) | 2015-08-19 |
ES2728469T3 (es) | 2019-10-24 |
JPWO2012029608A1 (ja) | 2013-10-28 |
CN103081309B (zh) | 2016-01-20 |
CN103081309A (zh) | 2013-05-01 |
EP2597332A1 (en) | 2013-05-29 |
US9712018B2 (en) | 2017-07-18 |
EP2597332A4 (en) | 2017-11-15 |
US20130154412A1 (en) | 2013-06-20 |
EP2597332B1 (en) | 2019-03-06 |
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