WO2016072008A1 - Wiper motor and wiper device - Google Patents

Wiper motor and wiper device Download PDF

Info

Publication number
WO2016072008A1
WO2016072008A1 PCT/JP2014/079530 JP2014079530W WO2016072008A1 WO 2016072008 A1 WO2016072008 A1 WO 2016072008A1 JP 2014079530 W JP2014079530 W JP 2014079530W WO 2016072008 A1 WO2016072008 A1 WO 2016072008A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
wiper
case
motor
tooth portion
Prior art date
Application number
PCT/JP2014/079530
Other languages
French (fr)
Japanese (ja)
Inventor
礒　幸義
修浩 安田
真一 増田
Original Assignee
株式会社ミツバ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ミツバ filed Critical 株式会社ミツバ
Priority to PCT/JP2014/079530 priority Critical patent/WO2016072008A1/en
Publication of WO2016072008A1 publication Critical patent/WO2016072008A1/en

Links

Images

Classifications

    • 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
    • B60S1/18—Means for transmitting drive mechanically
    • B60S1/26—Means for transmitting drive mechanically by toothed gearing
    • 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

Definitions

  • the present invention relates to a wiper motor and a wiper device that swing a wiper member that wipes a windshield provided in a vehicle or the like.
  • a wiper device that secures the visibility of the driver and the like is mounted on the front side and the rear side of a vehicle such as an automobile.
  • the wiper device is driven by operating an operation switch in the passenger compartment, whereby a wiper member provided on the windshield performs a reciprocating wiping operation so that rainwater, dust, etc. adhering to the windshield are wiped off.
  • a wiper motor used in the wiper device a motor with a speed reduction mechanism that can obtain a large output while being small is employed.
  • the motor with a speed reduction mechanism described in Patent Document 1 includes a motor portion and a speed reduction mechanism portion.
  • An armature shaft is rotatably accommodated in the yoke forming the motor portion, and a spur gear having a worm, a pair of counter gears, and an output shaft is rotatably accommodated in the gear case forming the speed reduction mechanism portion.
  • the worm is rotated by the armature shaft, and the rotation of the worm is transmitted to the spur gear through a pair of counter gears.
  • the rotation of the armature shaft is decelerated to a predetermined rotational speed, and the torque that has been increased in torque is output from the output shaft.
  • the thickness dimension along the axial direction of the spur gear is different from that of the spur gear.
  • approximately half along the axial direction of the spur gear has a dimension protruding from the opening of the gear case. Therefore, when the gear cover is attached to the opening of the gear case, the gear cover may come into contact with the spur gear.
  • the teeth of the spur gear may be chipped or deformed. If the teeth of the spur gear are chipped or deformed, there may be a problem that the smooth operation of the spur gear is hindered.
  • the load that can be applied to the output shaft varies greatly depending on the area where the wiper motor is used. Specifically, in a snowfall area, a snow load that accumulates on the windshield may be applied to the output shaft, and a highly rigid spur gear (described in Patent Document 1 above) is also used to suppress damage to the wiper motor. Need to be used. On the other hand, in a region where there is almost no snowfall (hereinafter referred to as a non-snowfall region), the wiper motor used in the snowy region has excessive performance. For this reason, it has been necessary to simplify the specifications of the wiper motor for non-snowfall areas in order to improve the ease of assembly, reduce weight, improve vehicle fuel efficiency, and the like.
  • An object of the present invention is to provide a wiper motor capable of simplifying the specification of the wiper motor as well as improving the assemblability.
  • an armature having a worm, a motor case that rotatably accommodates the armature, a gear case that accommodates the worm and has an opening connected to the motor case, and the opening of the gear case
  • a first gear provided with a gear cover that closes a portion, a first tooth portion housed in the gear case and meshed with the worm, and a second tooth portion provided coaxially with the first tooth portion
  • a wiper motor having a second gear and a third gear housed in the gear case and provided with a third tooth portion engaged with the second tooth portion of the first gear and the second gear,
  • the thickness dimension along the axial direction of the third gear is such that the third gear is hidden by the gear case when the gear case is viewed from a direction orthogonal to the axial direction of the third gear. It is sized to be.
  • a plurality of conductive members extending toward one side surface of the third gear are provided inside the gear cover, and a tip portion of the conductive member is provided on one side surface of the third gear.
  • a conductive plate that is in sliding contact with the conductive member is provided, and a reinforcing portion that increases the rigidity of the conductive member is provided on the conductive member.
  • an armature having a worm, a motor case that rotatably accommodates the armature, a gear case that accommodates the worm and has an opening connected to the motor case, and the gear case
  • a first gear that includes a gear cover that closes the opening, a first tooth portion that is housed in the gear case and meshes with the worm, and a second tooth portion that is provided coaxially with the first tooth portion.
  • a second gear, and a third gear including a third gear housed in the gear case and having a third tooth portion having an output shaft engaged with the second tooth portion of the first gear and the second gear.
  • the thickness dimension along the axial direction of the third gear is determined when the gear case is viewed from a direction orthogonal to the axial direction of the third gear.
  • the third gear is dimensioned to be hidden by the gear case, and the power of the output shaft is transmitted between the wiper member that is swung by the wiper motor and the output shaft provided at the rotation center of the third gear.
  • a power transmission member for transmitting to the wiper member is provided, the power transmission member is formed by pressing a steel plate, and a cross-sectional shape in a direction perpendicular to the longitudinal direction of the power transmission member is a concave shape.
  • the wiper member is mounted on one end side and has a wiper shaft on which the power transmission member is mounted on the other end side.
  • the wiper shaft is rotatable by a resin pivot holder. Supported.
  • the thickness dimension along the axial direction of the third gear is such that the third gear is hidden by the gear case when the gear case is viewed from a direction orthogonal to the axial direction of the third gear. Therefore, when attaching a gear cover to the opening part of a gear case, it can suppress that a gear cover contacts a 3rd gear. Therefore, it is possible to improve the assembly of the wiper motor and improve the yield.
  • the thickness of the third gear can be reduced to reduce the size and weight of the wiper motor, and the wiper motor specifications can be simplified for non-snowfall areas.
  • the power transmission that transmits the power of the output shaft to the wiper member between the wiper member that is swung by the wiper motor configured as described above and the output shaft that is provided at the rotation center of the third gear.
  • a member is provided, the power transmission member is formed by pressing a steel plate, and the cross-sectional shape in a direction orthogonal to the longitudinal direction of the power transmission member is a concave shape. Therefore, it is possible to reduce the weight while reducing the rigidity of the power transmission member, and it is possible to realize a wiper device for non-snowfall areas.
  • the wiper shaft on which the wiper member and the power transmission member are mounted can be rotatably supported by a resin pivot holder.
  • FIG. 3 is a structural diagram showing an internal structure of the wiper motor of FIG. 2. It is a partial expanded sectional view of the wiper motor which passes along the center of the 3rd gear.
  • FIG. 5 is an enlarged view corresponding to a broken-line circle A portion in FIG. 4, and is an explanatory diagram comparing [present invention] with [prior art]. It is an enlarged view corresponding to the broken-line circle B part of FIG. 4, and is explanatory drawing which compares [this invention] with [prior art].
  • FIG. 1 is a front view showing a part of a vehicle equipped with the wiper device of the present invention
  • FIG. 2 is a perspective view showing the wiper device of FIG. 1
  • FIG. 3 is a structural diagram showing the internal structure of the wiper motor of FIG. 4 is a partially enlarged cross-sectional view of the wiper motor passing through the center of the third gear
  • FIG. 5 is an enlarged view corresponding to the broken-line circle A portion of FIG. 4, in which [present invention] is compared with [prior art].
  • 6 is an enlarged view corresponding to the broken-line circle B in FIG. 4, an explanatory view comparing [present invention] and [prior art]
  • FIG. 7 is a contact plate and third gear provided on the gear cover.
  • 8 is a perspective view showing a detailed structure of a relay plate provided in FIG. 8, and FIG. 8 is a partial sectional view for explaining a fixing structure of the relay plate to the third gear.
  • a wiper device 12 is mounted on the front side of the vehicle 10 to secure the driver's field of view by wiping rainwater, dust, and the like adhering to the front window glass 11.
  • the wiper device 12 includes a driver seat side wiper arm 13a and a passenger seat side wiper arm 13b.
  • the base end sides of these wiper arms 13a and 13b are respectively attached to one end sides of a driver seat side wiper shaft 14a and a passenger seat side wiper shaft 14b provided in the vehicle 10.
  • the wiper arms 13a and 13b are driven to swing around the wiper shafts 14a and 14b.
  • the wiper device 12 is provided with a wiper motor 15 which is a motor with a speed reduction mechanism.
  • the wiper motor 15 is fixed in a cowl (not shown) in the engine room so that the output shaft 16 faces the upper side of the vehicle 10, and the output shaft 16 is connected to each wiper arm via the link mechanism 17 and the wiper shafts 14a and 14b. 13a and 13b.
  • the wiper motor 15 is actuated, the rotational movement of the output shaft 16 is converted into a swinging motion by the link mechanism 17 and transmitted to the wiper shafts 14a and 14b, whereby the wiper arms 13a and 13b swing.
  • the driver-side wiper blade 18a and the passenger-side wiper blade 18b are attached to the front end sides of the wiper arms 13a and 13b, respectively, and the wiper blades 18a and 18b are in elastic contact with the front windshield 11.
  • the wiper arms 13 a and 13 b are swung by the wiper motor 15, the wiper blades 18 a and 18 b are swung within predetermined wiping ranges 11 a and 11 b on the front window glass 11, thereby wiping the front window glass 11.
  • each wiper arm 13a, 13b and each wiper blade 18a, 18b constitute a wiper member in the present invention.
  • the wiper device 12 is a modular type wiper device 12 in which the wiper shafts 14a and 14b, the wiper motor 15, and the link mechanism 17 are integrated. Thereby, the mounting operation to the vehicle 10 can be facilitated while facilitating the transfer operation to the vehicle manufacturer that mounts the wiper device 12.
  • the wiper device 12 is viewed from an obliquely lower side of the vehicle 10 in order to easily show the structure of the link mechanism 17.
  • a driver's seat side pivot holder 19a is provided on one end in the longitudinal direction (right side in the figure) of the wiper device 12, and a passenger's seat side pivot holder 19b is provided on the other end side in the longitudinal direction (left side in the figure) of the wiper device 12. Is provided.
  • the pivot holders 19a and 19b respectively support the wiper shafts 14a and 14b so as to be rotatable.
  • Each pivot holder 19a, 19b is provided with a plurality of fixing portions 19c for fixing the wiper device 12 to the vehicle 10 (see FIG. 1).
  • the driver seat side pivot holder 19a is provided with one fixing portion 19c
  • the passenger seat side pivot holder 19b is provided with two fixing portions 19c.
  • Each fixing portion 19c is fixed to the vehicle 10 via a rubber bush RB.
  • the driver's seat side pivot holder 19a is formed in a predetermined shape by a resin material such as plastic.
  • the driver seat side pivot holder 19a includes a cylindrical main body portion 19d that rotatably supports the driver seat side wiper shaft 14a, and an insertion portion 19e that is inserted into one end in the longitudinal direction of the pipe frame PF.
  • the passenger seat side pivot holder 19b since the passenger seat side pivot holder 19b has a function of supporting the wiper motor 15, it is necessary to increase the rigidity of the driver seat side pivot holder 19a. Therefore, the passenger seat side pivot holder 19b is formed in a predetermined shape by pressing a steel plate.
  • the passenger seat side pivot holder 19b includes a motor fixing portion 19f to which the wiper motor 15 is fixed, a cylindrical main body portion 19g that rotatably supports the passenger seat side wiper shaft 14b, and a longitudinal end of the pipe frame PF. And an insertion portion (not shown) to be inserted.
  • the pipe frame PF is a hollow pipe made of steel and has a function of integrating the pivot holders 19a and 19b. Accordingly, the pivot holders 19a and 19b and the pipe frame PF are firmly fixed by caulking or the like. This prevents the wiper device 12 from being twisted by the reaction force accompanying the swing of the wiper shafts 14a and 14b when the wiper device 12 is operated.
  • Each drive plate 20a, 20b is formed in a plate shape by pressing a steel plate, and the other end side of each drive plate 20a, 20b swings about each wiper shaft 14a, 14b. Yes.
  • each drive plate 20a, 20b is connected to both ends in the longitudinal direction of the connecting rod 21 via a ball joint (not shown) so as to be rotatable. Thereby, the swinging motion of each drive plate 20a, 20b is interlocked.
  • the connecting rod 21 has a substantially U-shaped cross section by pressing a steel plate. That is, the cross-sectional shape in the direction orthogonal to the longitudinal direction of the connecting rod 21 is a concave shape, and the connecting rod 21 constitutes a power transmission member in the present invention.
  • the connecting rod 21 as a press-formed product, the weight of the wiper device 12 is reduced as compared with the case of using a hollow pipe.
  • one end side of a link plate 22 formed in a plate shape by pressing a steel plate is fixed to the output shaft 16 of the wiper motor 15. That is, the other end side of the link plate 22 rotates about the output shaft 16.
  • both end portions of the drive rod 23 in the longitudinal direction are connected to the other end side of the link plate 22 and the other side of the driver seat side drive plate 20a via a ball joint (not shown). Has been. Thereby, the rotational motion of the link plate 22 is converted into the swing motion of the driver seat side drive plate 20a.
  • the drive rod 23 has the same shape as that of the connecting rod 21, and constitutes a power transmission member in the present invention.
  • the link mechanism 17 is formed by the drive plates 20a and 20b, the connecting rod 21, the link plate 22 and the drive rod 23.
  • the wiper motor 15 includes a motor unit 30 and a gear unit 40.
  • a yoke (motor case) 31 that forms the outline of the motor unit 30 is formed in a cylindrical shape having one end opened and a bottom by drawing a steel plate. Inside the yoke 31, a plurality of magnets 32 (only two are shown in the figure) are mounted. Further, an armature 33 is rotatably accommodated inside each magnet 32 through a predetermined gap.
  • the armature shaft 34 is fixed to the rotation center of the armature 33.
  • the armature shaft 34 rotates integrally with the rotation of the armature 33.
  • a first worm 35 a and a second worm 35 b are integrally provided on the distal end side (right side in the drawing) of the armature shaft 34 so as to be aligned in the axial direction of the armature shaft 34. That is, the worms 35 a and 35 b are provided integrally with the armature 33 and are rotated by the armature shaft 34.
  • the twist directions of the worms 35a and 35b are opposite to each other.
  • a commutator 36 is integrally provided at a position close to the armature 33 of the armature shaft 34. At least two brushes 37 are in sliding contact with the commutator 36.
  • the wiper motor 15 is an electric motor with a brush, and rotates about the armature shaft 34 by a supply current supplied from a battery or the like (not shown) installed in the engine room or the like.
  • the wiper motor 15 of the present embodiment is a wiper motor for non-snowfall areas, so that a large load is not applied to the wiper motor 15. Therefore, since the driving torque of the wiper motor 15 can be reduced, the power consumption of the wiper motor 15 is suppressed as compared with the past.
  • the gear portion 40 includes a gear case 41 and a gear cover 42.
  • the gear case 41 is connected to the yoke 31 and is formed in a substantially bathtub shape by pouring molten aluminum material into a mold.
  • the gear case 41 has a bottom 41a, a side wall 41b, and an opening 41c.
  • the opening 41c of the gear case 41 is closed by a gear cover 42 made of a resin material such as plastic, and a sealant (not shown) is provided between the gear case 41 and the gear cover 42. This prevents rainwater or the like from entering the inside of the gear case 41.
  • a speed reduction mechanism 43 is rotatably accommodated in the gear case 41.
  • the speed reduction mechanism 43 includes a first worm 35a and a second worm 35b provided integrally with the armature shaft 34, a first counter gear 44a and a second counter gear 44b respectively engaged with the worms 35a and 35b, and each counter.
  • the spur gear 45 is engaged with each of the gears 44a and 44b.
  • the first counter gear 44a constitutes the first gear in the present invention
  • the second counter gear 44b constitutes the second gear in the present invention
  • the spur gear 45 constitutes the third gear in the present invention.
  • the counter gears 44a and 44b are respectively provided with large-diameter first tooth portions 46a and 46b.
  • the worms 35a and 35b are engaged with the first tooth portions 46a and 46b, respectively.
  • each counter gear 44a, 44b is rotated clockwise as the armature 33 (armature shaft 34) rotates, as indicated by the arrows in the figure.
  • the counter gears 44a and 44b are respectively provided with small-diameter second tooth portions 47a and 47b, and the second tooth portions 47a and 47b are arranged on the same axis as the first tooth portions 46a and 46b, respectively. ing.
  • a third tooth portion 45a provided on the spur gear 45 is meshed with each of the second tooth portions 47a and 47b. As a result, the spur gear 45 is rotated in the counterclockwise direction as the counter gears 44a and 44b rotate as indicated by arrows in the figure.
  • an output shaft support portion 48 is provided integrally with the bottom 41 a of the gear case 41.
  • the output shaft support portion 48 rotatably supports the output shaft 16 fixed to the spur gear 45, is formed in a substantially cylindrical shape, and extends in the axial direction of the output shaft 16.
  • a cylindrical bearing member 49 is mounted inside the output shaft support portion 48. Thereby, the output shaft 16 can rotate smoothly.
  • a waterproof cap 50 made of an elastic material such as rubber is attached to the distal end portion (lower side in the drawing) of the output shaft support portion 48. This prevents rainwater or the like from entering the inside of the gear case 41 via the gap between the output shaft support portion 48 and the output shaft 16.
  • the thickness dimension along the axial direction of the spur gear 45 is set to h1.
  • the thickness dimension h1 (for example, 10 mm) of the spur gear 45 is set smaller than the thickness dimension h2 (for example, 16 mm) of the spur gear SG of [Prior Art] shown in FIG. 5B (h1 ⁇ h2). Therefore, the rigidity of the spur gear 45 is lower than the rigidity of the spur gear SG. Since the wiper motor 15 of the present embodiment is a wiper motor for non-snowfall areas, the wiper motor 15 is not subjected to a large load due to snow. Therefore, even if the thickness dimension of the spur gear 45 is h1, sufficient strength is secured in consideration of safety. Note that the spur gear 45 is the largest component among the components constituting the speed reduction mechanism 43, and thus is very effective in reducing the size and weight of the wiper motor 15.
  • the thickness dimension h1 of the spur gear 45 is set in consideration of the assembly of the wiper motor 15 in addition to the reduction in size and weight (simplification) of the wiper motor 15. Specifically, when the gear case 41 is viewed from the side, the spur gear 45 is covered with the side wall 41b. That is, the spur gear 45 does not protrude above the upper surface SF of the side wall 41b (on the gear cover 42 side). Thus, the thickness dimension h1 of the spur gear 45 is a dimension hidden by the side wall portion 41b of the gear case 41 when the gear case 41 is viewed from a direction orthogonal to the axial direction of the spur gear 45.
  • the gear cover 42 when the gear cover 42 is attached to the opening 41c of the gear case 41, the gear cover 42 is prevented from coming into contact with the spur gear 45, and damage to the third tooth portion 45a of the spur gear 45 is suppressed.
  • the spur gear SG protrudes greatly above the upper surface SF of the side wall portion SW (the gear cover GC side), and therefore the assembly accuracy is low. It may happen that the gear cover GC contacts the spur gear SG.
  • the power transmission path of the speed reduction mechanism 43 is optimized as compared with the wiper motor WM of [Prior Art]. It is illustrated. Specifically, in the wiper motor 15, as shown in FIG. 6A, the meshing center C1 between the spur gear 45 and each counter gear 44a, 44b is the first tooth portion 46a of each counter gear 44a, 44b. , 46b. On the other hand, in the wiper motor WM, as shown in FIG. 6B, the meshing center C2 between the spur gear SG and the counter gears CG1 and CG2 is closer to the first tooth portion TP2 than the meshing center C1 of the wiper motor 15. It is arranged at a distant position (upper in the figure).
  • each of the counter gears 44a and 44b (CG1 and CG2) is rotatably supported in a cantilever state by a support pin P fixed to the gear case 41 (see FIG. 4). Therefore, the meshing center between the spur gear and each counter gear does not have to bend so that the support pin P is inclined when the center of the spur gear and the counter gear is close to the fixing portion (lower side in the figure) of the support pin P and the gear case 41. That is, as compared with [Prior Art] in FIG. 6B, the wiper motor 15 maintains a good meshing state between the spur gear 45 and the counter gears 44a and 44b and improves power transmission efficiency. Yes. Further, the support pin P hardly bends, so that the so-called “gear jump” phenomenon such as the disengagement between the spur gear 45 and the counter gears 44a and 44b is effectively suppressed.
  • an insulating member 54 that holds the first contact plate 51, the second contact plate 52, and the third contact plate 53 is mounted inside the gear cover 42, that is, on the gear case 41 side of the gear cover 42.
  • the insulating member 54 is formed in a plate shape by a resin material such as plastic, and holds the contact plates 51, 52, 53 at predetermined intervals so as not to be short-circuited.
  • the insulating member 54 is mounted with electrical components (not shown) such as a capacitor and a choke coil that absorb electrical noise generated by the wiper motor 15.
  • Each contact plate 51, 52, 53 constitutes a conductive member in the present invention, and is formed into a predetermined shape by pressing a thin plate material made of brass or the like having excellent conductivity.
  • the conductive members are shaded in FIG. 7, and the contact plates 51, 52, and 53 are simplified in the drawings other than FIG.
  • Fixing portions 51 a, 52 a, and 53 a that are fixed to the insulating member 54 are provided at the base end portions of the contact plates 51, 52, and 53, respectively.
  • Each of the fixing portions 51a, 52a, 53a extends in a direction orthogonal to the axial direction of the spur gear 45, that is, in the extending direction of the insulating member 54.
  • the fixing portions 51a, 52a, 53a of the contact plates 51, 52, 53 are integrally provided with main body portions 51b, 52b, 53b, respectively.
  • the main body portions 51b, 52b, and 53b are bent from the fixed portions 51a, 52a, and 53a and extend toward the spur gear 45.
  • the main body portions 51b, 52b, and 53b are extended from the fixed portions 51a, 52a, and 53a toward the upper surface portion 45c that is one side surface of the spur gear 45.
  • the contact portions 51b, 52b, 53b of the contact plates 51, 52, 53 are in contact with the upper surface 45c of the spur gear 45 and the relay plate 55 mounted on the upper surface 45c, respectively.
  • (Front end portions) 51c, 52c, and 53c are provided.
  • the contact portion 51 c of the first contact plate 51 is in sliding contact with the upper surface portion 45 c and the outer peripheral portion of the relay plate 55
  • the contact portion 52 c of the second contact plate 52 is in sliding contact with a substantially central portion along the radial direction of the relay plate 55.
  • the contact portion 53 c of the third contact plate 53 is in sliding contact with the upper surface portion 45 c and the inner peripheral portion of the relay plate 55.
  • the main body 51b of the first contact plate 51 is provided with a first reinforcing part 51d extending along the longitudinal direction.
  • a pair of second reinforcing portions 51e that are opposed to each other from the short side direction of the first contact plate 51 are provided between the main body portion 51b and the contact portion 51c.
  • These reinforcing portions 51d and 51e are provided by forming irregularities in the thickness direction of the first contact plate 51, and increase the bending rigidity of the first contact plate 51 in the thickness direction.
  • the first reinforcing portion 51d prevents the main body portion 51b from being twisted.
  • the second reinforcing portion 51e makes it difficult for the contact portion 51c to bend with respect to the main body portion 51b, so that the contact portion 51c can reliably make electrical contact with the relay plate 55.
  • the main body part 52b of the second contact plate 52 is provided with a first reinforcing part 52d extending along the longitudinal direction thereof.
  • a pair of second reinforcing portions 52e facing each other from the short side direction of the second contact plate 52 is provided between the main body portion 52b and the contact portion 52c.
  • These reinforcing portions 52d and 52e are provided by forming irregularities in the thickness direction of the second contact plate 52, and increase the bending rigidity of the second contact plate 52 in the thickness direction.
  • the first reinforcing portion 52d prevents the main body portion 52b from being twisted.
  • the second reinforcing portion 52e makes it difficult for the contact portion 52c to bend with respect to the main body portion 52b, so that the contact portion 52c can reliably make electrical contact with the relay plate 55.
  • a reinforcing part 53d extending along the longitudinal direction of the main body part 53b is provided.
  • the reinforcing portion 53d is provided by forming irregularities in the thickness direction of the third contact plate 53, and increases the bending rigidity of the third contact plate 53 in the thickness direction. Specifically, the reinforcing portion 53d prevents the main body portion 53b from being twisted, makes the contact portion 53c difficult to bend with respect to the main body portion 53b, and ensures that the contact portion 53c is electrically connected to the relay plate 55. Can be touched.
  • the thickness dimension h1 of the spur gear 45 is smaller than that of a conventional wiper motor, that is, a wiper motor that can cope with a snowfall area where a large load can be applied (FIG. 5). reference).
  • a conventional wiper motor that is, a wiper motor that can cope with a snowfall area where a large load can be applied (FIG. 5). reference).
  • the separation distance between the inner side of the gear cover 42 and the upper surface portion 45c of the spur gear 45 is as shown in FIG. ) Of [Conventional technology]. Therefore, in the wiper motor 15 of the present embodiment, the contact plates 51, 52, 53 are reinforced as described above to prevent the contact plates 51, 52, 53 from wobbling or rattling that may lead to contact failure. is doing. It should be noted that it is much cheaper to reinforce each contact plate 51, 52, 53 than when a gear case and a gear cover are newly manufactured.
  • the relay plate 55 constitutes a conductive plate in the present invention, and is formed in a substantially disc shape by pressing a thin plate material made of brass or the like having excellent conductivity.
  • a protruding portion 55 a that protrudes outward in the radial direction of the relay plate 55 is provided on the outer peripheral portion of the relay plate 55.
  • the inner peripheral portion of the relay plate 55 faces outward in the radial direction of the relay plate 55.
  • a recessed portion 55b that is recessed is provided.
  • These protrusions 55a and depressions 55b are disposed substantially opposite to each other with the center of the relay plate 55 interposed therebetween.
  • the width dimension of the protrusion part 55a and the hollow part 55b along the circumferential direction of the relay plate 55 is set to substantially the same dimension.
  • each fixed claw 55c is inserted into the press-fit portion 45d provided in the thick portion 45b on the radially inner side of the spur gear 45 in the axial direction of the spur gear 45. It is press-fitted from.
  • the radial inner side of the spur gear 45 is a thick portion 45b
  • the radial outer side of the spur gear 45 is a thin portion 45e, which also reduces the weight of the spur gear 45.
  • the relay plate 55 can be easily mounted only by press-fitting each fixing claw 55c into each press-fitting portion 45d. That is, it is not necessary to bend the fixing claw after mounting. This also improves the assembly workability of the wiper motor 15.
  • the relay plate 55 is mounted on the upper surface portion 45 c of the spur gear 45, and the contact plates 51, 52, 53 are pressed against the relay plate 55. Therefore, no force acts on the relay plate 55 in the direction away from the spur gear 45. Therefore, the fixing strength of the relay plate 55 to the upper surface portion 45c of the spur gear 45 is sufficient only by the press fitting as described above.
  • the contact plates 51, 52, 53 and the relay plate 55 stop the wiper arms 13a, 13b (see FIG. 1) for a predetermined stop regardless of the operation state of the operation switch (not shown) by the driver or the like. It has a function for stopping at a position.
  • the operation switch is in a state where both the second contact plate 52 and the third contact plate 53 are slidably contacted on the relay plate 55 and electrically connected to each other. Even when is turned off, the rotation of the wiper motor 15 is continued by the electrical connection between the second contact plate 52 and the third contact plate 53.
  • the thickness dimension h1 along the axial direction of the spur gear 45 is determined when the gear case 41 is viewed from a direction orthogonal to the axial direction of the spur gear 45. Since the dimensions are hidden by the gear case 41, the gear cover 42 can be prevented from coming into contact with the spur gear 45 when the gear cover 42 is attached to the opening 41c of the gear case 41. Therefore, the assembly property of the wiper motor 15 can be improved and the yield can be improved. Further, the thickness of the spur gear 45 can be reduced to reduce the size and weight of the wiper motor 15, and the specification of the wiper motor 15 can be simplified for non-snowfall areas.
  • the contact plates 51, 52, 53 extending toward the upper surface portion 45c of the spur gear 45 are provided inside the gear cover 42, and the upper surface portion 45c of the spur gear 45 is provided.
  • a relay plate 55 is provided in which the contact portions 51c, 52c, 53c of the contact plates 51, 52, 53 are in sliding contact.
  • Each contact plate 51, 52, 53 is provided with first reinforcing portions 51d, 52d, second reinforcing portions 51e, 52e, and reinforcing portions 53d made of irregularities extending along the longitudinal direction. Therefore, the contact plates 51, 52, 53 can be prevented from being twisted, and the contact portions 51 c, 52 c, 53 c can be reliably brought into electrical contact with the relay plate 55.
  • the wiper arms 13 a and 13 b and the wiper blades 18 a and 18 b that are swung by the wiper motor 15, and the output shaft 16 provided at the rotation center of the spur gear 45.
  • a connecting rod 21 and a driving rod 23 for transmitting the power of the output shaft 16 to the wiper arms 13a and 13b and the wiper blades 18a and 18b are provided, and the connecting rod 21 and the driving rod 23 are formed by pressing a steel plate.
  • the cross-sectional shape of the direction orthogonal to the longitudinal direction of the connecting rod 21 and the drive rod 23 was made into concave shape. Therefore, it is possible to reduce the weight while reducing the rigidity of the connecting rod 21 and the drive rod 23, and it is possible to realize the wiper device 12 for non-snowfall areas.
  • the driver's seat side wiper arm 13a and the driver's seat side wiper blade 18a are mounted on one end side, and the connecting rod 21 and the drive rod 23 are disposed via the driver's seat side drive plate 20a. Then, the driver's seat side wiper shaft 14a mounted on the other end side was rotatably supported by a resin driver's seat side pivot holder 19a. Thereby, the wiper apparatus 12 can be further reduced in weight.
  • the wiper motor 15 is applied to the wiper device 12 for wiping the front window glass 11.
  • the present invention is not limited to this, and the wiper device for wiping the rear window glass of the vehicle is used. It can also be applied to.
  • the invention can be applied not only to vehicles such as automobiles but also to wiper devices mounted on airplanes, ships, railway vehicles, construction machines and the like.
  • the wiper motor 15 is an example of a motor with a brush.
  • the present invention is not limited to this and may be a brushless motor or the like.
  • a wiper motor and a wiper device are used for wiping a windshield provided in an automobile or the like with a wiper member to improve visibility of a driver or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The thickness dimension h1 of a spur gear 45 along the axial direction thereof is configured so as to be hidden by a gear case 41 when the gear case 41 is viewed from the direction orthogonal to the axial direction of the spur gear 45, and a gear cover can therefore be restrained from touching the spur gear 45 when the gear cover 42 is installed in an opening 41c of the gear case 41. The assembly of a wiper motor 15 can thereby be enhanced, and yield can be improved. The thickness of the spur gear 45 can also be reduced, the size and weight of the wiper motor 15 can be reduced, and the specification of the wiper motor 15 can be simplified for use in a non-snowfall area.

Description

ワイパモータおよびワイパ装置Wiper motor and wiper device
　本発明は、車両等に設けられるウィンドガラスを払拭するワイパ部材を揺動させるワイパモータおよびワイパ装置に関する。 The present invention relates to a wiper motor and a wiper device that swing a wiper member that wipes a windshield provided in a vehicle or the like.
　自動車等の車両の前方側や後方側には、運転者等の視界を確保するワイパ装置が搭載されている。ワイパ装置は、車室内にある操作スイッチを操作することで駆動され、これによりウィンドガラス上に設けられたワイパ部材が往復払拭動作して、ウィンドガラス上に付着した雨水や埃等が払拭される。ワイパ装置に用いられるワイパモータには、小型でありながら大きな出力が得られる減速機構付きモータが採用されている。 A wiper device that secures the visibility of the driver and the like is mounted on the front side and the rear side of a vehicle such as an automobile. The wiper device is driven by operating an operation switch in the passenger compartment, whereby a wiper member provided on the windshield performs a reciprocating wiping operation so that rainwater, dust, etc. adhering to the windshield are wiped off. . As a wiper motor used in the wiper device, a motor with a speed reduction mechanism that can obtain a large output while being small is employed.
　このような減速機構付きモータは、例えば、特許文献１に記載されている。特許文献１に記載された減速機構付きモータは、モータ部と減速機構部とを備えている。モータ部を形成するヨークには、アーマチュア軸が回転自在に収容され、減速機構部を形成するギヤケースには、ウォーム，一対のカウンタギヤ，出力軸を有する平歯車が回転自在に収容されている。ウォームはアーマチュア軸により回転され、ウォームの回転は一対のカウンタギヤを介して平歯車に伝達される。これにより、アーマチュア軸の回転が所定の回転数に減速され、高トルク化された回転力が出力軸から出力される。 Such a motor with a speed reduction mechanism is described in Patent Document 1, for example. The motor with a speed reduction mechanism described in Patent Document 1 includes a motor portion and a speed reduction mechanism portion. An armature shaft is rotatably accommodated in the yoke forming the motor portion, and a spur gear having a worm, a pair of counter gears, and an output shaft is rotatably accommodated in the gear case forming the speed reduction mechanism portion. The worm is rotated by the armature shaft, and the rotation of the worm is transmitted to the spur gear through a pair of counter gears. As a result, the rotation of the armature shaft is decelerated to a predetermined rotational speed, and the torque that has been increased in torque is output from the output shaft.
特開２０１０－１１０１１５号公報JP 2010-110115 A
　しかしながら、上述の特許文献１に記載された減速機構付きモータによれば、当該特許文献１の図４にも示されるように、平歯車の軸方向に沿う厚み寸法が、ギヤケースを平歯車の軸方向と直交する方向から見たときに、平歯車の軸方向に沿う略半分がギヤケースの開口部から突出した寸法となっている。よって、ギヤケースの開口部にギヤカバーを装着する際に、ギヤカバーが平歯車に接触するようなことが起こり得る。特に、小型軽量化を図ったワイパモータにおいては、樹脂製の平歯車が用いられるため、平歯車の歯が欠けたり変形したりするようなことが起こり得る。平歯車の歯が欠けたり変形したりすると、平歯車のスムーズな動作が阻害されるといった問題を生じ得る。 However, according to the motor with a speed reduction mechanism described in Patent Document 1 described above, as shown in FIG. 4 of Patent Document 1, the thickness dimension along the axial direction of the spur gear is different from that of the spur gear. When viewed from a direction orthogonal to the direction, approximately half along the axial direction of the spur gear has a dimension protruding from the opening of the gear case. Therefore, when the gear cover is attached to the opening of the gear case, the gear cover may come into contact with the spur gear. In particular, in a wiper motor that has been reduced in size and weight, since a spur gear made of resin is used, the teeth of the spur gear may be chipped or deformed. If the teeth of the spur gear are chipped or deformed, there may be a problem that the smooth operation of the spur gear is hindered.
　また、ワイパモータにおいては、当該ワイパモータを使用する地域によって、出力軸に掛かり得る負荷が大きく異なってくる。具体的には、降雪地域においては、ウィンドガラス上に降り積もった雪の荷重が出力軸に掛かることがあり、ワイパモータの損傷を抑制するためにも高い剛性の平歯車（上述の特許文献１に記載の平歯車）を用いる必要がある。その一方で、降雪が殆ど無い地域（以下、非降雪地域という）では、降雪地域で用いるワイパモータは過剰性能となる。そのため、非降雪地域向けに、組み立て性を向上させつつ、重量軽減や車両燃費の向上等を図るために、ワイパモータの仕様を簡素化する必要が生じていた。 Also, with a wiper motor, the load that can be applied to the output shaft varies greatly depending on the area where the wiper motor is used. Specifically, in a snowfall area, a snow load that accumulates on the windshield may be applied to the output shaft, and a highly rigid spur gear (described in Patent Document 1 above) is also used to suppress damage to the wiper motor. Need to be used. On the other hand, in a region where there is almost no snowfall (hereinafter referred to as a non-snowfall region), the wiper motor used in the snowy region has excessive performance. For this reason, it has been necessary to simplify the specifications of the wiper motor for non-snowfall areas in order to improve the ease of assembly, reduce weight, improve vehicle fuel efficiency, and the like.
　本発明の目的は、組み立て性の向上は勿論のこと、ワイパモータの仕様を簡素化することができるワイパモータを提供することにある。 An object of the present invention is to provide a wiper motor capable of simplifying the specification of the wiper motor as well as improving the assemblability.
　本発明の一態様では、ウォームを有するアーマチュアと、前記アーマチュアを回転自在に収容するモータケースと、前記ウォームを収容し、前記モータケースに連結される開口部を有するギヤケースと、前記ギヤケースの前記開口部を閉塞するギヤカバーと、前記ギヤケースに収容され、前記ウォームに噛み合わされる第１歯部と、当該第１歯部の同軸上に設けられる第２歯部と、をそれぞれ備えた第１ギヤおよび第２ギヤと、前記ギヤケースに収容され、前記第１ギヤおよび前記第２ギヤの前記第２歯部に噛み合わされる第３歯部を備えた第３ギヤと、を有するワイパモータであって、前記第３ギヤの軸方向に沿う厚み寸法は、前記ギヤケースを前記第３ギヤの軸方向と直交する方向から見たときに、前記第３ギヤが前記ギヤケースで隠される寸法とされる。 In one aspect of the present invention, an armature having a worm, a motor case that rotatably accommodates the armature, a gear case that accommodates the worm and has an opening connected to the motor case, and the opening of the gear case A first gear provided with a gear cover that closes a portion, a first tooth portion housed in the gear case and meshed with the worm, and a second tooth portion provided coaxially with the first tooth portion, and A wiper motor having a second gear and a third gear housed in the gear case and provided with a third tooth portion engaged with the second tooth portion of the first gear and the second gear, The thickness dimension along the axial direction of the third gear is such that the third gear is hidden by the gear case when the gear case is viewed from a direction orthogonal to the axial direction of the third gear. It is sized to be.
　本発明の他の態様では、前記ギヤカバーの内側に、前記第３ギヤの一方の側面に向けて延びる複数の導電部材が設けられ、前記第３ギヤの一方の側面に、前記導電部材の先端部が摺接する導電板が設けられ、前記導電部材に、当該導電部材の剛性を高める補強部が設けられる。 In another aspect of the present invention, a plurality of conductive members extending toward one side surface of the third gear are provided inside the gear cover, and a tip portion of the conductive member is provided on one side surface of the third gear. A conductive plate that is in sliding contact with the conductive member is provided, and a reinforcing portion that increases the rigidity of the conductive member is provided on the conductive member.
　本発明の他の態様では、ウォームを有するアーマチュアと、前記アーマチュアを回転自在に収容するモータケースと、前記ウォームを収容し、前記モータケースに連結される開口部を有するギヤケースと、前記ギヤケースの前記開口部を閉塞するギヤカバーと、前記ギヤケースに収容され、前記ウォームに噛み合わされる第１歯部と、当該第１歯部の同軸上に設けられる第２歯部と、をそれぞれ備えた第１ギヤおよび第２ギヤと、前記ギヤケースに収容され、前記第１ギヤおよび前記第２ギヤの前記第２歯部に噛み合わされる出力軸を有する第３歯部を備えた第３ギヤと、を有するワイパモータを備えたワイパ装置であって、前記第３ギヤの軸方向に沿う厚み寸法は、前記ギヤケースを前記第３ギヤの軸方向と直交する方向から見たときに、前記第３ギヤが前記ギヤケースで隠される寸法とされ、前記ワイパモータにより揺動されるワイパ部材と、前記第３ギヤの回転中心に設けられる前記出力軸との間に、前記出力軸の動力を前記ワイパ部材に伝達する動力伝達部材が設けられ、前記動力伝達部材は鋼板をプレス加工して形成され、前記動力伝達部材の長手方向と直交する方向の断面形状が凹形状とされる。 In another aspect of the present invention, an armature having a worm, a motor case that rotatably accommodates the armature, a gear case that accommodates the worm and has an opening connected to the motor case, and the gear case A first gear that includes a gear cover that closes the opening, a first tooth portion that is housed in the gear case and meshes with the worm, and a second tooth portion that is provided coaxially with the first tooth portion. And a second gear, and a third gear including a third gear housed in the gear case and having a third tooth portion having an output shaft engaged with the second tooth portion of the first gear and the second gear. The thickness dimension along the axial direction of the third gear is determined when the gear case is viewed from a direction orthogonal to the axial direction of the third gear. The third gear is dimensioned to be hidden by the gear case, and the power of the output shaft is transmitted between the wiper member that is swung by the wiper motor and the output shaft provided at the rotation center of the third gear. A power transmission member for transmitting to the wiper member is provided, the power transmission member is formed by pressing a steel plate, and a cross-sectional shape in a direction perpendicular to the longitudinal direction of the power transmission member is a concave shape.
　本発明の他の態様では、一端側に前記ワイパ部材が装着され、他端側に前記動力伝達部材が装着されるワイパ軸を有し、前記ワイパ軸は、樹脂製のピボットホルダにより回転自在に支持される。 In another aspect of the present invention, the wiper member is mounted on one end side and has a wiper shaft on which the power transmission member is mounted on the other end side. The wiper shaft is rotatable by a resin pivot holder. Supported.
　本発明のワイパモータによれば、第３ギヤの軸方向に沿う厚み寸法は、ギヤケースを第３ギヤの軸方向と直交する方向から見たときに、第３ギヤがギヤケースで隠される寸法とされるので、ギヤケースの開口部にギヤカバーを装着する際に、ギヤカバーが第３ギヤに接触するのを抑制できる。よって、ワイパモータの組み付け性を向上させて歩留まりを良くすることができる。また、第３ギヤの厚みを薄くしてワイパモータを小型軽量化することができ、ワイパモータの仕様を非降雪地域向けに簡素化することができる。 According to the wiper motor of the present invention, the thickness dimension along the axial direction of the third gear is such that the third gear is hidden by the gear case when the gear case is viewed from a direction orthogonal to the axial direction of the third gear. Therefore, when attaching a gear cover to the opening part of a gear case, it can suppress that a gear cover contacts a 3rd gear. Therefore, it is possible to improve the assembly of the wiper motor and improve the yield. In addition, the thickness of the third gear can be reduced to reduce the size and weight of the wiper motor, and the wiper motor specifications can be simplified for non-snowfall areas.
　本発明のワイパ装置によれば、上記構成のワイパモータにより揺動されるワイパ部材と、第３ギヤの回転中心に設けられる出力軸との間に、出力軸の動力をワイパ部材に伝達する動力伝達部材を設け、動力伝達部材を鋼板をプレス加工することで形成し、動力伝達部材の長手方向と直交する方向の断面形状を凹形状にする。よって、動力伝達部材の剛性を下げつつ軽量化することができ、非降雪地域向けのワイパ装置を実現できる。この場合、ワイパ部材および動力伝達部材が装着されるワイパ軸を、樹脂製のピボットホルダに回転自在に支持させることもできる。 According to the wiper device of the present invention, the power transmission that transmits the power of the output shaft to the wiper member between the wiper member that is swung by the wiper motor configured as described above and the output shaft that is provided at the rotation center of the third gear. A member is provided, the power transmission member is formed by pressing a steel plate, and the cross-sectional shape in a direction orthogonal to the longitudinal direction of the power transmission member is a concave shape. Therefore, it is possible to reduce the weight while reducing the rigidity of the power transmission member, and it is possible to realize a wiper device for non-snowfall areas. In this case, the wiper shaft on which the wiper member and the power transmission member are mounted can be rotatably supported by a resin pivot holder.
本発明のワイパ装置を搭載した車両の一部を示す正面図である。It is a front view which shows a part of vehicle which mounts the wiper apparatus of this invention. 図１のワイパ装置を示す斜視図である。It is a perspective view which shows the wiper apparatus of FIG. 図２のワイパモータの内部構造を示す構造図である。FIG. 3 is a structural diagram showing an internal structure of the wiper motor of FIG. 2. 第３ギヤの中心を通るワイパモータの部分拡大断面図である。It is a partial expanded sectional view of the wiper motor which passes along the center of the 3rd gear. 図４の破線円Ａ部に対応する拡大図で、［本発明］と［従来技術］とを比較する説明図である。FIG. 5 is an enlarged view corresponding to a broken-line circle A portion in FIG. 4, and is an explanatory diagram comparing [present invention] with [prior art]. 図４の破線円Ｂ部に対応する拡大図で、［本発明］と［従来技術］とを比較する説明図である。It is an enlarged view corresponding to the broken-line circle B part of FIG. 4, and is explanatory drawing which compares [this invention] with [prior art]. ギヤカバーに設けられるコンタクトプレートおよび第３ギヤに設けられるリレープレートの詳細構造を示す斜視図である。It is a perspective view which shows the detailed structure of the contact plate provided in a gear cover, and the relay plate provided in a 3rd gear. 第３ギヤに対するリレープレートの固定構造を説明する部分断面図である。It is a fragmentary sectional view explaining the fixation structure of the relay plate with respect to the 3rd gear.
　以下、本発明の一実施の形態について、図面を用いて詳細に説明する。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
　図１は本発明のワイパ装置を搭載した車両の一部を示す正面図を、図２は図１のワイパ装置を示す斜視図を、図３は図２のワイパモータの内部構造を示す構造図を、図４は第３ギヤの中心を通るワイパモータの部分拡大断面図を、図５は図４の破線円Ａ部に対応する拡大図で、［本発明］と［従来技術］とを比較する説明図を、図６は図４の破線円Ｂ部に対応する拡大図で、［本発明］と［従来技術］とを比較する説明図を、図７はギヤカバーに設けられるコンタクトプレートおよび第３ギヤに設けられるリレープレートの詳細構造を示す斜視図を、図８は第３ギヤに対するリレープレートの固定構造を説明する部分断面図をそれぞれ示している。 1 is a front view showing a part of a vehicle equipped with the wiper device of the present invention, FIG. 2 is a perspective view showing the wiper device of FIG. 1, and FIG. 3 is a structural diagram showing the internal structure of the wiper motor of FIG. 4 is a partially enlarged cross-sectional view of the wiper motor passing through the center of the third gear, and FIG. 5 is an enlarged view corresponding to the broken-line circle A portion of FIG. 4, in which [present invention] is compared with [prior art]. 6 is an enlarged view corresponding to the broken-line circle B in FIG. 4, an explanatory view comparing [present invention] and [prior art], and FIG. 7 is a contact plate and third gear provided on the gear cover. 8 is a perspective view showing a detailed structure of a relay plate provided in FIG. 8, and FIG. 8 is a partial sectional view for explaining a fixing structure of the relay plate to the third gear.
　図１に示すように、車両１０の前方側には、フロントウインドガラス１１に付着した雨水や埃等を払拭して運転者の視界を確保するワイパ装置１２が搭載されている。ワイパ装置１２は、運転席側ワイパアーム１３ａと助手席側ワイパアーム１３ｂとを備えている。これらのワイパアーム１３ａ，１３ｂの基端側は、車両１０に設けられた運転席側ワイパ軸１４ａおよび助手席側ワイパ軸１４ｂの一端側にそれぞれ装着されている。そして、各ワイパアーム１３ａ，１３ｂは、各ワイパ軸１４ａ，１４ｂを中心にそれぞれ揺動駆動される。 As shown in FIG. 1, a wiper device 12 is mounted on the front side of the vehicle 10 to secure the driver's field of view by wiping rainwater, dust, and the like adhering to the front window glass 11. The wiper device 12 includes a driver seat side wiper arm 13a and a passenger seat side wiper arm 13b. The base end sides of these wiper arms 13a and 13b are respectively attached to one end sides of a driver seat side wiper shaft 14a and a passenger seat side wiper shaft 14b provided in the vehicle 10. The wiper arms 13a and 13b are driven to swing around the wiper shafts 14a and 14b.
　各ワイパアーム１３ａ，１３ｂを揺動駆動するために、ワイパ装置１２には減速機構付きモータであるワイパモータ１５が設けられている。ワイパモータ１５は、その出力軸１６が車両１０の上側を向くようエンジンルーム内のカウル内（図示せず）に固定され、出力軸１６はリンク機構１７および各ワイパ軸１４ａ，１４ｂを介して各ワイパアーム１３ａ，１３ｂに接続されている。ワイパモータ１５が作動すると、出力軸１６の回転運動がリンク機構１７により揺動運動に変換されて各ワイパ軸１４ａ，１４ｂに伝達され、これにより各ワイパアーム１３ａ，１３ｂは揺動する。 In order to swing and drive the wiper arms 13a and 13b, the wiper device 12 is provided with a wiper motor 15 which is a motor with a speed reduction mechanism. The wiper motor 15 is fixed in a cowl (not shown) in the engine room so that the output shaft 16 faces the upper side of the vehicle 10, and the output shaft 16 is connected to each wiper arm via the link mechanism 17 and the wiper shafts 14a and 14b. 13a and 13b. When the wiper motor 15 is actuated, the rotational movement of the output shaft 16 is converted into a swinging motion by the link mechanism 17 and transmitted to the wiper shafts 14a and 14b, whereby the wiper arms 13a and 13b swing.
　各ワイパアーム１３ａ，１３ｂの先端側には、運転席側ワイパブレード１８ａおよび助手席側ワイパブレード１８ｂがそれぞれ取り付けられ、各ワイパブレード１８ａ，１８ｂは、フロントウインドガラス１１に弾性接触されている。ワイパモータ１５によって各ワイパアーム１３ａ，１３ｂが揺動されると、各ワイパブレード１８ａ，１８ｂはフロントウインドガラス１１上の所定の払拭範囲１１ａ，１１ｂで揺動し、これによりフロントウインドガラス１１が払拭される。ここで、各ワイパアーム１３ａ，１３ｂおよび各ワイパブレード１８ａ，１８ｂは、本発明におけるワイパ部材を構成している。 The driver-side wiper blade 18a and the passenger-side wiper blade 18b are attached to the front end sides of the wiper arms 13a and 13b, respectively, and the wiper blades 18a and 18b are in elastic contact with the front windshield 11. When the wiper arms 13 a and 13 b are swung by the wiper motor 15, the wiper blades 18 a and 18 b are swung within predetermined wiping ranges 11 a and 11 b on the front window glass 11, thereby wiping the front window glass 11. . Here, each wiper arm 13a, 13b and each wiper blade 18a, 18b constitute a wiper member in the present invention.
　図２に示すように、ワイパ装置１２は、各ワイパ軸１４ａ，１４ｂと、ワイパモータ１５と、リンク機構１７とが一体化されたモジュラータイプのワイパ装置１２となっている。これにより、当該ワイパ装置１２を搭載する車両メーカへの搬送作業を容易にしつつ、車両１０への搭載作業を容易にできる。なお、図２においては、リンク機構１７の構造を判り易く示すために、ワイパ装置１２を車両１０の斜め下側から見た状態を示している。 As shown in FIG. 2, the wiper device 12 is a modular type wiper device 12 in which the wiper shafts 14a and 14b, the wiper motor 15, and the link mechanism 17 are integrated. Thereby, the mounting operation to the vehicle 10 can be facilitated while facilitating the transfer operation to the vehicle manufacturer that mounts the wiper device 12. In FIG. 2, the wiper device 12 is viewed from an obliquely lower side of the vehicle 10 in order to easily show the structure of the link mechanism 17.
　ワイパ装置１２の長手方向一端側（図中右側）には、運転席側ピボットホルダ１９ａが設けられ、ワイパ装置１２の長手方向他端側（図中左側）には、助手席側ピボットホルダ１９ｂが設けられている。各ピボットホルダ１９ａ，１９ｂは、各ワイパ軸１４ａ，１４ｂをそれぞれ回動自在に支持している。また、各ピボットホルダ１９ａ，１９ｂには、ワイパ装置１２を車両１０（図１参照）に固定するための複数の固定部１９ｃが設けられている。なお、運転席側ピボットホルダ１９ａには１つの固定部１９ｃが設けられ、助手席側ピボットホルダ１９ｂには２つの固定部１９ｃが設けられている。各固定部１９ｃは、ラバーブッシュＲＢを介して車両１０に固定される。 A driver's seat side pivot holder 19a is provided on one end in the longitudinal direction (right side in the figure) of the wiper device 12, and a passenger's seat side pivot holder 19b is provided on the other end side in the longitudinal direction (left side in the figure) of the wiper device 12. Is provided. The pivot holders 19a and 19b respectively support the wiper shafts 14a and 14b so as to be rotatable. Each pivot holder 19a, 19b is provided with a plurality of fixing portions 19c for fixing the wiper device 12 to the vehicle 10 (see FIG. 1). The driver seat side pivot holder 19a is provided with one fixing portion 19c, and the passenger seat side pivot holder 19b is provided with two fixing portions 19c. Each fixing portion 19c is fixed to the vehicle 10 via a rubber bush RB.
　運転席側ピボットホルダ１９ａは、プラスチック等の樹脂材料により所定形状に形成されている。運転席側ピボットホルダ１９ａには、運転席側ワイパ軸１４ａを回動自在に支持する筒状本体部１９ｄと、パイプフレームＰＦの長手方向一端側に差し込まれる差し込み部１９ｅとを備えている。一方、助手席側ピボットホルダ１９ｂは、ワイパモータ１５を支持する機能を備えるため、運転席側ピボットホルダ１９ａよりも剛性を高める必要がある。そのため、助手席側ピボットホルダ１９ｂは、鋼板をプレス加工等することにより所定形状に形成されている。助手席側ピボットホルダ１９ｂは、ワイパモータ１５が固定されるモータ固定部１９ｆと、助手席側ワイパ軸１４ｂを回動自在に支持する筒状本体部１９ｇと、パイプフレームＰＦの長手方向他端側に差し込まれる差し込み部（図示せず）とを備えている。 The driver's seat side pivot holder 19a is formed in a predetermined shape by a resin material such as plastic. The driver seat side pivot holder 19a includes a cylindrical main body portion 19d that rotatably supports the driver seat side wiper shaft 14a, and an insertion portion 19e that is inserted into one end in the longitudinal direction of the pipe frame PF. On the other hand, since the passenger seat side pivot holder 19b has a function of supporting the wiper motor 15, it is necessary to increase the rigidity of the driver seat side pivot holder 19a. Therefore, the passenger seat side pivot holder 19b is formed in a predetermined shape by pressing a steel plate. The passenger seat side pivot holder 19b includes a motor fixing portion 19f to which the wiper motor 15 is fixed, a cylindrical main body portion 19g that rotatably supports the passenger seat side wiper shaft 14b, and a longitudinal end of the pipe frame PF. And an insertion portion (not shown) to be inserted.
　ここで、パイプフレームＰＦは、鋼材よりなる中空パイプであって、各ピボットホルダ１９ａ，１９ｂを一体化させる機能を有している。したがって、各ピボットホルダ１９ａ，１９ｂとパイプフレームＰＦとは、それぞれかしめ固定等によって強固に固定されている。これにより、ワイパ装置１２の作動時において、各ワイパ軸１４ａ，１４ｂの揺動に伴う反力によって、ワイパ装置１２が捻れることが防止される。 Here, the pipe frame PF is a hollow pipe made of steel and has a function of integrating the pivot holders 19a and 19b. Accordingly, the pivot holders 19a and 19b and the pipe frame PF are firmly fixed by caulking or the like. This prevents the wiper device 12 from being twisted by the reaction force accompanying the swing of the wiper shafts 14a and 14b when the wiper device 12 is operated.
　各ワイパ軸１４ａ，１４ｂの他端側には、運転席側駆動プレート２０ａおよび助手席側駆動プレート２０ｂの一端側がそれぞれ装着されている。各駆動プレート２０ａ，２０ｂは、鋼板をプレス加工等することで板状に形成され、各駆動プレート２０ａ，２０ｂの他端側は、各ワイパ軸１４ａ，１４ｂを中心に揺動するようになっている。 One end side of the driver seat side drive plate 20a and the passenger seat side drive plate 20b is mounted on the other end side of each wiper shaft 14a, 14b. Each drive plate 20a, 20b is formed in a plate shape by pressing a steel plate, and the other end side of each drive plate 20a, 20b swings about each wiper shaft 14a, 14b. Yes.
　各駆動プレート２０ａ，２０ｂの他端側には、連結ロッド２１の長手方向両端部が、図示しないボールジョイントを介して回動自在に連結されている。これにより、各駆動プレート２０ａ，２０ｂの揺動運動が連動される。連結ロッド２１は、鋼板をプレス加工等することにより、断面が略Ｕ字形状に形成されている。つまり、連結ロッド２１の長手方向と直交する方向の断面形状が凹形状とされており、この連結ロッド２１は、本発明における動力伝達部材を構成している。このように、連結ロッド２１をプレス成形品とすることで、中空パイプを用いる場合に比して、ワイパ装置１２の軽量化が図られている。 The other end of each drive plate 20a, 20b is connected to both ends in the longitudinal direction of the connecting rod 21 via a ball joint (not shown) so as to be rotatable. Thereby, the swinging motion of each drive plate 20a, 20b is interlocked. The connecting rod 21 has a substantially U-shaped cross section by pressing a steel plate. That is, the cross-sectional shape in the direction orthogonal to the longitudinal direction of the connecting rod 21 is a concave shape, and the connecting rod 21 constitutes a power transmission member in the present invention. Thus, by using the connecting rod 21 as a press-formed product, the weight of the wiper device 12 is reduced as compared with the case of using a hollow pipe.
　図１に示すように、ワイパモータ１５の出力軸１６には、鋼板をプレス加工等することで板状に形成された、リンクプレート２２の一端側が固定されている。つまり、リンクプレート２２の他端側は、出力軸１６を中心に回転するようになっている。リンクプレート２２の他端側および運転席側駆動プレート２０ａの他端側には、図２に示すように、駆動ロッド２３の長手方向両端部が、図示しないボールジョイントを介して回動自在に連結されている。これにより、リンクプレート２２の回転運動が、運転席側駆動プレート２０ａの揺動運動に変換される。 As shown in FIG. 1, one end side of a link plate 22 formed in a plate shape by pressing a steel plate is fixed to the output shaft 16 of the wiper motor 15. That is, the other end side of the link plate 22 rotates about the output shaft 16. As shown in FIG. 2, both end portions of the drive rod 23 in the longitudinal direction are connected to the other end side of the link plate 22 and the other side of the driver seat side drive plate 20a via a ball joint (not shown). Has been. Thereby, the rotational motion of the link plate 22 is converted into the swing motion of the driver seat side drive plate 20a.
　ここで、駆動ロッド２３においても、連結ロッド２１と同様の形状をなしており、本発明における動力伝達部材を構成している。また、リンク機構１７は、各駆動プレート２０ａ，２０ｂ，連結ロッド２１，リンクプレート２２および駆動ロッド２３によって形成されている。 Here, the drive rod 23 has the same shape as that of the connecting rod 21, and constitutes a power transmission member in the present invention. The link mechanism 17 is formed by the drive plates 20a and 20b, the connecting rod 21, the link plate 22 and the drive rod 23.
　図２および図３に示すように、ワイパモータ１５は、モータ部３０とギヤ部４０とを備えている。モータ部３０の外郭を形成するヨーク（モータケース）３１は、鋼板を絞り加工等することにより、一端が開口されて底部を有した筒状に形成されている。ヨーク３１の内側には、複数のマグネット３２（図示では２つのみ示す）が装着されている。また、各マグネット３２の内側には、所定の隙間を介してアーマチュア３３が回転自在に収容されている。 2 and 3, the wiper motor 15 includes a motor unit 30 and a gear unit 40. A yoke (motor case) 31 that forms the outline of the motor unit 30 is formed in a cylindrical shape having one end opened and a bottom by drawing a steel plate. Inside the yoke 31, a plurality of magnets 32 (only two are shown in the figure) are mounted. Further, an armature 33 is rotatably accommodated inside each magnet 32 through a predetermined gap.
　アーマチュア３３の回転中心には、アーマチュア軸３４が固定されている。アーマチュア軸３４は、アーマチュア３３の回転に伴って一体回転する。アーマチュア軸３４の先端側（図中右側）には、当該アーマチュア軸３４の軸方向に並ぶようにして第１ウォーム３５ａおよび第２ウォーム３５ｂが一体に設けられている。つまり、各ウォーム３５ａ，３５ｂは、アーマチュア３３に一体に設けられ、アーマチュア軸３４により回転される。各ウォーム３５ａ，３５ｂのねじれ方向はそれぞれ逆向きとなっている。 The armature shaft 34 is fixed to the rotation center of the armature 33. The armature shaft 34 rotates integrally with the rotation of the armature 33. A first worm 35 a and a second worm 35 b are integrally provided on the distal end side (right side in the drawing) of the armature shaft 34 so as to be aligned in the axial direction of the armature shaft 34. That is, the worms 35 a and 35 b are provided integrally with the armature 33 and are rotated by the armature shaft 34. The twist directions of the worms 35a and 35b are opposite to each other.
　また、アーマチュア軸３４のアーマチュア３３に近接する位置には、整流子３６が一体に設けられている。整流子３６には少なくとも２本のブラシ３７が摺接するようになっている。このように、ワイパモータ１５は、ブラシ付きの電動モータとなっており、エンジンルーム内等に設置されるバッテリ等（図示せず）から供給される供給電流によりアーマチュア軸３４を中心に回転する。なお、本実施の形態のワイパモータ１５は、非降雪地域向けのワイパモータであるため、ワイパモータ１５には大きな負荷が掛からない。よって、ワイパモータ１５の駆動トルクを下げることができるため、従前に比してワイパモータ１５の消費電力が抑えられている。 Further, a commutator 36 is integrally provided at a position close to the armature 33 of the armature shaft 34. At least two brushes 37 are in sliding contact with the commutator 36. Thus, the wiper motor 15 is an electric motor with a brush, and rotates about the armature shaft 34 by a supply current supplied from a battery or the like (not shown) installed in the engine room or the like. Note that the wiper motor 15 of the present embodiment is a wiper motor for non-snowfall areas, so that a large load is not applied to the wiper motor 15. Therefore, since the driving torque of the wiper motor 15 can be reduced, the power consumption of the wiper motor 15 is suppressed as compared with the past.
　図２ないし図４に示すように、ギヤ部４０は、ギヤケース４１とギヤカバー４２とを備えている。ギヤケース４１はヨーク３１に連結され、溶融したアルミ材料を鋳型に流し込むことで略バスタブ形状に形成されている。ギヤケース４１は、底部４１ａ，側壁部４１ｂおよび開口部４１ｃを有している。ギヤケース４１の開口部４１ｃは、プラスチック等の樹脂材料よりなるギヤカバー４２により閉塞され、ギヤケース４１とギヤカバー４２との間にはシール剤（図示せず）が設けられている。これにより、ギヤケース４１の内部に雨水等が進入するのを防止している。 As shown in FIGS. 2 to 4, the gear portion 40 includes a gear case 41 and a gear cover 42. The gear case 41 is connected to the yoke 31 and is formed in a substantially bathtub shape by pouring molten aluminum material into a mold. The gear case 41 has a bottom 41a, a side wall 41b, and an opening 41c. The opening 41c of the gear case 41 is closed by a gear cover 42 made of a resin material such as plastic, and a sealant (not shown) is provided between the gear case 41 and the gear cover 42. This prevents rainwater or the like from entering the inside of the gear case 41.
　ギヤケース４１の内部には、図３および図４に示すように、減速機構４３が回転自在に収容されている。この減速機構４３は、アーマチュア軸３４に一体に設けた第１ウォーム３５ａおよび第２ウォーム３５ｂと、各ウォーム３５ａ，３５ｂにそれぞれ噛み合わされる第１カウンタギヤ４４ａおよび第２カウンタギヤ４４ｂと、各カウンタギヤ４４ａ，４４ｂのそれぞれに噛み合わされる平歯車４５とから構成されている。ここで、第１カウンタギヤ４４ａは本発明における第１ギヤを、第２カウンタギヤ４４ｂは本発明における第２ギヤを、平歯車４５は本発明における第３ギヤを構成している。 As shown in FIGS. 3 and 4, a speed reduction mechanism 43 is rotatably accommodated in the gear case 41. The speed reduction mechanism 43 includes a first worm 35a and a second worm 35b provided integrally with the armature shaft 34, a first counter gear 44a and a second counter gear 44b respectively engaged with the worms 35a and 35b, and each counter. The spur gear 45 is engaged with each of the gears 44a and 44b. Here, the first counter gear 44a constitutes the first gear in the present invention, the second counter gear 44b constitutes the second gear in the present invention, and the spur gear 45 constitutes the third gear in the present invention.
　各カウンタギヤ４４ａ，４４ｂには、大径の第１歯部４６ａ，４６ｂがそれぞれ設けられている。各第１歯部４６ａ，４６ｂには、各ウォーム３５ａ，３５ｂがそれぞれ噛み合わされている。これにより、各カウンタギヤ４４ａ，４４ｂは、図中矢印に示すように、アーマチュア３３（アーマチュア軸３４）の回転に伴っていずれも時計回り方向に回転される。 The counter gears 44a and 44b are respectively provided with large-diameter first tooth portions 46a and 46b. The worms 35a and 35b are engaged with the first tooth portions 46a and 46b, respectively. As a result, each counter gear 44a, 44b is rotated clockwise as the armature 33 (armature shaft 34) rotates, as indicated by the arrows in the figure.
　また、各カウンタギヤ４４ａ，４４ｂには、小径の第２歯部４７ａ，４７ｂがそれぞれ設けられ、各第２歯部４７ａ，４７ｂは、各第１歯部４６ａ，４６ｂの同軸上にそれぞれ配置されている。各第２歯部４７ａ，４７ｂのそれぞれには、平歯車４５に設けられた第３歯部４５ａが噛み合わされている。これにより、平歯車４５は、図中矢印に示すように、各カウンタギヤ４４ａ，４４ｂの回転に伴って反時計回り方向に回転される。 The counter gears 44a and 44b are respectively provided with small-diameter second tooth portions 47a and 47b, and the second tooth portions 47a and 47b are arranged on the same axis as the first tooth portions 46a and 46b, respectively. ing. A third tooth portion 45a provided on the spur gear 45 is meshed with each of the second tooth portions 47a and 47b. As a result, the spur gear 45 is rotated in the counterclockwise direction as the counter gears 44a and 44b rotate as indicated by arrows in the figure.
　そして、アーマチュア３３（アーマチュア軸３４）の回転は、各ウォーム３５ａ，３５ｂおよび各カウンタギヤ４４ａ，４４ｂを介して、減速された状態で平歯車４５に伝達される。これにより、平歯車４５の回転中心に固定された出力軸１６から、高トルク化された回転力が外部（リンク機構１７）に出力される。 The rotation of the armature 33 (armature shaft 34) is transmitted to the spur gear 45 in a decelerated state via the worms 35a and 35b and the counter gears 44a and 44b. As a result, torque output from the output shaft 16 fixed to the center of rotation of the spur gear 45 is output to the outside (link mechanism 17).
　図４に示すように、ギヤケース４１の底部４１ａには、出力軸支持部４８が一体に設けられている。出力軸支持部４８は、平歯車４５に固定した出力軸１６を回転自在に支持するもので、略円筒状に形成されて出力軸１６の軸方向に延ばされている。出力軸支持部４８の内側には、筒状の軸受部材４９が装着されている。これにより、出力軸１６はスムーズに回転することができる。また、出力軸支持部４８の先端部分（図中下側）には、ゴム等の弾性材料よりなる防水キャップ５０が装着されている。これにより、出力軸支持部４８と出力軸１６との間を介して、ギヤケース４１の内部に雨水等が進入するのを防止している。 As shown in FIG. 4, an output shaft support portion 48 is provided integrally with the bottom 41 a of the gear case 41. The output shaft support portion 48 rotatably supports the output shaft 16 fixed to the spur gear 45, is formed in a substantially cylindrical shape, and extends in the axial direction of the output shaft 16. A cylindrical bearing member 49 is mounted inside the output shaft support portion 48. Thereby, the output shaft 16 can rotate smoothly. In addition, a waterproof cap 50 made of an elastic material such as rubber is attached to the distal end portion (lower side in the drawing) of the output shaft support portion 48. This prevents rainwater or the like from entering the inside of the gear case 41 via the gap between the output shaft support portion 48 and the output shaft 16.
　図５（ａ）に示すように、平歯車４５の軸方向に沿う厚み寸法はｈ１に設定されている。この平歯車４５の厚み寸法ｈ１（例えば10mm）は、図５（ｂ）に示す［従来技術］の平歯車ＳＧの厚み寸法ｈ２（例えば16mm）よりも小さく設定されている（ｈ１＜ｈ２）。よって、平歯車４５の剛性は平歯車ＳＧの剛性よりも低くなっている。本実施の形態のワイパモータ１５は、非降雪地域向けのワイパモータであるため、ワイパモータ１５には雪に起因する大きな負荷が掛からない。よって、平歯車４５の厚み寸法がｈ１であっても、安全性を見込んで十分な強度が確保されている。なお、平歯車４５は、減速機構４３を構成する部品の中でも最も大きな部品であるため、ワイパモータ１５の小型軽量化にも非常に有効である。 As shown in FIG. 5A, the thickness dimension along the axial direction of the spur gear 45 is set to h1. The thickness dimension h1 (for example, 10 mm) of the spur gear 45 is set smaller than the thickness dimension h2 (for example, 16 mm) of the spur gear SG of [Prior Art] shown in FIG. 5B (h1 <h2). Therefore, the rigidity of the spur gear 45 is lower than the rigidity of the spur gear SG. Since the wiper motor 15 of the present embodiment is a wiper motor for non-snowfall areas, the wiper motor 15 is not subjected to a large load due to snow. Therefore, even if the thickness dimension of the spur gear 45 is h1, sufficient strength is secured in consideration of safety. Note that the spur gear 45 is the largest component among the components constituting the speed reduction mechanism 43, and thus is very effective in reducing the size and weight of the wiper motor 15.
　平歯車４５の厚み寸法ｈ１は、ワイパモータ１５の小型軽量化等（簡素化）の他に、ワイパモータ１５の組み立て性も考慮して設定されている。具体的には、ギヤケース４１を側方から見ると、平歯車４５は側壁部４１ｂにより覆われている。つまり、平歯車４５は、側壁部４１ｂの上面ＳＦよりも上方側（ギヤカバー４２側）に突出していない。このように、平歯車４５の厚み寸法ｈ１は、ギヤケース４１を平歯車４５の軸方向と直交する方向から見たときに、ギヤケース４１の側壁部４１ｂにより隠される寸法となっている。 The thickness dimension h1 of the spur gear 45 is set in consideration of the assembly of the wiper motor 15 in addition to the reduction in size and weight (simplification) of the wiper motor 15. Specifically, when the gear case 41 is viewed from the side, the spur gear 45 is covered with the side wall 41b. That is, the spur gear 45 does not protrude above the upper surface SF of the side wall 41b (on the gear cover 42 side). Thus, the thickness dimension h1 of the spur gear 45 is a dimension hidden by the side wall portion 41b of the gear case 41 when the gear case 41 is viewed from a direction orthogonal to the axial direction of the spur gear 45.
　これにより、ギヤケース４１の開口部４１ｃにギヤカバー４２を装着する際に、当該ギヤカバー４２が平歯車４５に接触しないようにして、平歯車４５の第３歯部４５ａ等の損傷が抑制される。一方、図５（ｂ）の［従来技術］のワイパモータＷＭにおいては、平歯車ＳＧは、側壁部ＳＷの上面ＳＦよりも上方側（ギヤカバーＧＣ側）に大きくはみ出ているため、組み立て精度が低いとギヤカバーＧＣが平歯車ＳＧに接触するようなことが起こり得る。 Thus, when the gear cover 42 is attached to the opening 41c of the gear case 41, the gear cover 42 is prevented from coming into contact with the spur gear 45, and damage to the third tooth portion 45a of the spur gear 45 is suppressed. On the other hand, in the [prior art] wiper motor WM of FIG. 5B, the spur gear SG protrudes greatly above the upper surface SF of the side wall portion SW (the gear cover GC side), and therefore the assembly accuracy is low. It may happen that the gear cover GC contacts the spur gear SG.
　また、本実施の形態に係るワイパモータ１５においては、図６（ａ），（ｂ）に示すように、［従来技術］のワイパモータＷＭに比して、減速機構４３の動力伝達経路の適正化が図られている。具体的には、ワイパモータ１５においては、図６（ａ）に示すように、平歯車４５と各カウンタギヤ４４ａ，４４ｂとの噛み合い中心Ｃ１が、各カウンタギヤ４４ａ，４４ｂの各第１歯部４６ａ，４６ｂ寄りに配置されている。一方、ワイパモータＷＭにおいては、図６（ｂ）に示すように、平歯車ＳＧと各カウンタギヤＣＧ１，ＣＧ２との噛み合い中心Ｃ２が、ワイパモータ１５の噛み合い中心Ｃ１よりも、各第１歯部ＴＰ２から離れた位置（図中上方）に配置されている。 Further, in the wiper motor 15 according to the present embodiment, as shown in FIGS. 6A and 6B, the power transmission path of the speed reduction mechanism 43 is optimized as compared with the wiper motor WM of [Prior Art]. It is illustrated. Specifically, in the wiper motor 15, as shown in FIG. 6A, the meshing center C1 between the spur gear 45 and each counter gear 44a, 44b is the first tooth portion 46a of each counter gear 44a, 44b. , 46b. On the other hand, in the wiper motor WM, as shown in FIG. 6B, the meshing center C2 between the spur gear SG and the counter gears CG1 and CG2 is closer to the first tooth portion TP2 than the meshing center C1 of the wiper motor 15. It is arranged at a distant position (upper in the figure).
　ここで、各カウンタギヤ４４ａ，４４ｂ（ＣＧ１，ＣＧ２）は、何れもギヤケース４１（図４参照）に固定された支持ピンＰによって、片持ち状態で回動自在に支持されている。したがって、平歯車と各カウンタギヤとの噛み合い中心は、支持ピンＰとギヤケース４１との固定箇所（図中下側）に近付けた方が、支持ピンＰを傾斜させるように撓ませずに済む。つまり、図６（ｂ）の［従来技術］に比して、ワイパモータ１５の方が、平歯車４５と各カウンタギヤ４４ａ，４４ｂとの噛み合い状態が良好に保持されて動力伝達効率が向上している。また、支持ピンＰは殆ど撓むことが無く、平歯車４５と各カウンタギヤ４４ａ，４４ｂとの噛み合いがずれる等、所謂「ギヤ跳び」現象が効果的に抑制される。 Here, each of the counter gears 44a and 44b (CG1 and CG2) is rotatably supported in a cantilever state by a support pin P fixed to the gear case 41 (see FIG. 4). Therefore, the meshing center between the spur gear and each counter gear does not have to bend so that the support pin P is inclined when the center of the spur gear and the counter gear is close to the fixing portion (lower side in the figure) of the support pin P and the gear case 41. That is, as compared with [Prior Art] in FIG. 6B, the wiper motor 15 maintains a good meshing state between the spur gear 45 and the counter gears 44a and 44b and improves power transmission efficiency. Yes. Further, the support pin P hardly bends, so that the so-called “gear jump” phenomenon such as the disengagement between the spur gear 45 and the counter gears 44a and 44b is effectively suppressed.
　図４および図７に示すように、ギヤカバー４２の内側、つまりギヤカバー４２のギヤケース４１側には、第１コンタクトプレート５１，第２コンタクトプレート５２および第３コンタクトプレート５３を保持する絶縁部材５４が装着されている。絶縁部材５４は、プラスチック等の樹脂材料により板状に形成され、各コンタクトプレート５１，５２，５３を短絡しないように所定間隔で保持している。なお、絶縁部材５４には、各コンタクトプレート５１，５２，５３の他に、ワイパモータ１５が発生する電気ノイズを吸収するコンデンサやチョークコイル等の電気部品（図示せず）が装着されている。 As shown in FIGS. 4 and 7, an insulating member 54 that holds the first contact plate 51, the second contact plate 52, and the third contact plate 53 is mounted inside the gear cover 42, that is, on the gear case 41 side of the gear cover 42. Has been. The insulating member 54 is formed in a plate shape by a resin material such as plastic, and holds the contact plates 51, 52, 53 at predetermined intervals so as not to be short-circuited. In addition to the contact plates 51, 52, and 53, the insulating member 54 is mounted with electrical components (not shown) such as a capacitor and a choke coil that absorb electrical noise generated by the wiper motor 15.
　各コンタクトプレート５１，５２，５３は、本発明における導電部材を構成し、導電性に優れた黄銅等よりなる薄い板材をプレス加工することで所定形状に形成されている。なお、図面を見易くするために、図７においては導電部材に網掛けを施し、図７以外の図面においては各コンタクトプレート５１，５２，５３の図示を簡素化している。各コンタクトプレート５１，５２，５３の基端部には、絶縁部材５４に固定される固定部５１ａ，５２ａ，５３ａがそれぞれ設けられている。各固定部５１ａ，５２ａ，５３ａは、平歯車４５の軸方向と直交する方向、つまり絶縁部材５４の延在方向に延びている。 Each contact plate 51, 52, 53 constitutes a conductive member in the present invention, and is formed into a predetermined shape by pressing a thin plate material made of brass or the like having excellent conductivity. In order to make the drawing easy to see, the conductive members are shaded in FIG. 7, and the contact plates 51, 52, and 53 are simplified in the drawings other than FIG. Fixing portions 51 a, 52 a, and 53 a that are fixed to the insulating member 54 are provided at the base end portions of the contact plates 51, 52, and 53, respectively. Each of the fixing portions 51a, 52a, 53a extends in a direction orthogonal to the axial direction of the spur gear 45, that is, in the extending direction of the insulating member 54.
　また、各コンタクトプレート５１，５２，５３の各固定部５１ａ，５２ａ，５３ａには、本体部５１ｂ，５２ｂ，５３ｂがそれぞれ一体に設けられている。これらの本体部５１ｂ，５２ｂ，５３ｂは、各固定部５１ａ，５２ａ，５３ａから屈曲されて平歯車４５に向けて延びている。具体的には、本体部５１ｂ，５２ｂ，５３ｂは、各固定部５１ａ，５２ａ，５３ａから平歯車４５の一方の側面である上面部４５ｃに向けて延ばされている。 Further, the fixing portions 51a, 52a, 53a of the contact plates 51, 52, 53 are integrally provided with main body portions 51b, 52b, 53b, respectively. The main body portions 51b, 52b, and 53b are bent from the fixed portions 51a, 52a, and 53a and extend toward the spur gear 45. Specifically, the main body portions 51b, 52b, and 53b are extended from the fixed portions 51a, 52a, and 53a toward the upper surface portion 45c that is one side surface of the spur gear 45.
　さらに、各コンタクトプレート５１，５２，５３の各本体部５１ｂ，５２ｂ，５３ｂには、平歯車４５の上面部４５ｃ上、および当該上面部４５ｃに装着されたリレープレート５５上をそれぞれ摺接する接点部（先端部）５１ｃ，５２ｃ，５３ｃが設けられている。第１コンタクトプレート５１の接点部５１ｃは、上面部４５ｃおよびリレープレート５５の外周部分を摺接し、第２コンタクトプレート５２の接点部５２ｃは、リレープレート５５の径方向に沿う略中央部分を摺接し、第３コンタクトプレート５３の接点部５３ｃは、上面部４５ｃおよびリレープレート５５の内周部分を摺接する。 Further, the contact portions 51b, 52b, 53b of the contact plates 51, 52, 53 are in contact with the upper surface 45c of the spur gear 45 and the relay plate 55 mounted on the upper surface 45c, respectively. (Front end portions) 51c, 52c, and 53c are provided. The contact portion 51 c of the first contact plate 51 is in sliding contact with the upper surface portion 45 c and the outer peripheral portion of the relay plate 55, and the contact portion 52 c of the second contact plate 52 is in sliding contact with a substantially central portion along the radial direction of the relay plate 55. The contact portion 53 c of the third contact plate 53 is in sliding contact with the upper surface portion 45 c and the inner peripheral portion of the relay plate 55.
　第１コンタクトプレート５１の本体部５１ｂには、その長手方向に沿って延びる第１補強部５１ｄが設けられている。また、本体部５１ｂと接点部５１ｃとの間には、第１コンタクトプレート５１の短手方向から対向する一対の第２補強部５１ｅが設けられている。これらの補強部５１ｄ，５１ｅは、第１コンタクトプレート５１の板厚方向に凹凸を形成することで設けられ、第１コンタクトプレート５１の板厚方向に対する曲げ剛性を高めている。具体的には、第１補強部５１ｄは、本体部５１ｂが捻れるのを防止している。第２補強部５１ｅは、接点部５１ｃを本体部５１ｂに対して曲がり難くして、接点部５１ｃがリレープレート５５に対して確実に電気的に接触できるようにしている。 The main body 51b of the first contact plate 51 is provided with a first reinforcing part 51d extending along the longitudinal direction. In addition, a pair of second reinforcing portions 51e that are opposed to each other from the short side direction of the first contact plate 51 are provided between the main body portion 51b and the contact portion 51c. These reinforcing portions 51d and 51e are provided by forming irregularities in the thickness direction of the first contact plate 51, and increase the bending rigidity of the first contact plate 51 in the thickness direction. Specifically, the first reinforcing portion 51d prevents the main body portion 51b from being twisted. The second reinforcing portion 51e makes it difficult for the contact portion 51c to bend with respect to the main body portion 51b, so that the contact portion 51c can reliably make electrical contact with the relay plate 55.
　第２コンタクトプレート５２の本体部５２ｂには、その長手方向に沿って延びる第１補強部５２ｄが設けられている。また、本体部５２ｂと接点部５２ｃとの間には、第２コンタクトプレート５２の短手方向から対向する一対の第２補強部５２ｅが設けられている。これらの補強部５２ｄ，５２ｅは、第２コンタクトプレート５２の板厚方向に凹凸を形成することで設けられ、第２コンタクトプレート５２の板厚方向に対する曲げ剛性を高めている。具体的には、第１補強部５２ｄは、本体部５２ｂが捻れるのを防止している。第２補強部５２ｅは、接点部５２ｃを本体部５２ｂに対して曲がり難くして、接点部５２ｃがリレープレート５５に対して確実に電気的に接触できるようにしている。 The main body part 52b of the second contact plate 52 is provided with a first reinforcing part 52d extending along the longitudinal direction thereof. In addition, a pair of second reinforcing portions 52e facing each other from the short side direction of the second contact plate 52 is provided between the main body portion 52b and the contact portion 52c. These reinforcing portions 52d and 52e are provided by forming irregularities in the thickness direction of the second contact plate 52, and increase the bending rigidity of the second contact plate 52 in the thickness direction. Specifically, the first reinforcing portion 52d prevents the main body portion 52b from being twisted. The second reinforcing portion 52e makes it difficult for the contact portion 52c to bend with respect to the main body portion 52b, so that the contact portion 52c can reliably make electrical contact with the relay plate 55.
　第３コンタクトプレート５３の本体部５３ｂと接点部５３ｃとの間には、本体部５３ｂの長手方向に沿って延びる補強部５３ｄが設けられている。補強部５３ｄは、第３コンタクトプレート５３の板厚方向に凹凸を形成することで設けられ、第３コンタクトプレート５３の板厚方向に対する曲げ剛性を高めている。具体的には、補強部５３ｄは、本体部５３ｂが捻れるのを防止するとともに、接点部５３ｃを本体部５３ｂに対して曲がり難くして、接点部５３ｃがリレープレート５５に対して確実に電気的に接触できるようにしている。 Between the main body part 53b and the contact part 53c of the third contact plate 53, a reinforcing part 53d extending along the longitudinal direction of the main body part 53b is provided. The reinforcing portion 53d is provided by forming irregularities in the thickness direction of the third contact plate 53, and increases the bending rigidity of the third contact plate 53 in the thickness direction. Specifically, the reinforcing portion 53d prevents the main body portion 53b from being twisted, makes the contact portion 53c difficult to bend with respect to the main body portion 53b, and ensures that the contact portion 53c is electrically connected to the relay plate 55. Can be touched.
　本実施の形態に係るワイパモータ１５においては、従前のワイパモータ、つまり、大きな負荷が掛かり得る降雪地域にも対応可能なワイパモータに比して、平歯車４５の厚み寸法ｈ１が薄くなっている（図５参照）。これにより、低コスト化のためにギヤケース４１およびギヤカバー４２を共用すると、図５（ａ）に示すように、ギヤカバー４２の内側と平歯車４５の上面部４５ｃとの離間距離が、図５（ｂ）の［従来技術］に比して長くなってしまう。そこで、本実施の形態のワイパモータ１５においては、上述のように各コンタクトプレート５１，５２，５３を補強して、接点不良に繋がる各コンタクトプレート５１，５２，５３のふらつきやがたつきの発生を防止している。なお、各コンタクトプレート５１，５２，５３を補強した方が、新たにギヤケースおよびギヤカバーを製造する場合に比して、遙かに低コストで済む。 In the wiper motor 15 according to the present embodiment, the thickness dimension h1 of the spur gear 45 is smaller than that of a conventional wiper motor, that is, a wiper motor that can cope with a snowfall area where a large load can be applied (FIG. 5). reference). Thus, when the gear case 41 and the gear cover 42 are shared for cost reduction, the separation distance between the inner side of the gear cover 42 and the upper surface portion 45c of the spur gear 45 is as shown in FIG. ) Of [Conventional technology]. Therefore, in the wiper motor 15 of the present embodiment, the contact plates 51, 52, 53 are reinforced as described above to prevent the contact plates 51, 52, 53 from wobbling or rattling that may lead to contact failure. is doing. It should be noted that it is much cheaper to reinforce each contact plate 51, 52, 53 than when a gear case and a gear cover are newly manufactured.
　図７および図８に示すように、リレープレート５５は、本発明における導電板を構成し、導電性に優れた黄銅等よりなる薄い板材をプレス加工することで略円盤状に形成されている。リレープレート５５の外周部分には、当該リレープレート５５の径方向外側に向けて突出した突出部５５ａが設けられ、リレープレート５５の内周部分には、当該リレープレート５５の径方向外側に向けて窪んだ窪み部５５ｂが設けられている。これらの突出部５５ａおよび窪み部５５ｂは、リレープレート５５の中心を挟んで略対向配置されている。リレープレート５５の周方向に沿う突出部５５ａおよび窪み部５５ｂの幅寸法は、いずれも略同じ寸法に設定されている。 As shown in FIGS. 7 and 8, the relay plate 55 constitutes a conductive plate in the present invention, and is formed in a substantially disc shape by pressing a thin plate material made of brass or the like having excellent conductivity. A protruding portion 55 a that protrudes outward in the radial direction of the relay plate 55 is provided on the outer peripheral portion of the relay plate 55. The inner peripheral portion of the relay plate 55 faces outward in the radial direction of the relay plate 55. A recessed portion 55b that is recessed is provided. These protrusions 55a and depressions 55b are disposed substantially opposite to each other with the center of the relay plate 55 interposed therebetween. The width dimension of the protrusion part 55a and the hollow part 55b along the circumferential direction of the relay plate 55 is set to substantially the same dimension.
　図８に示すように、リレープレート５５の内周部分には、平歯車４５の軸方向に延びる合計４つの固定爪５５ｃ（図８では２つのみ示す）が一体に設けられている。各固定爪５５ｃは、リレープレート５５を平歯車４５の上面部４５ｃに装着する際に、平歯車４５の径方向内側にある肉厚部４５ｂに設けた圧入部４５ｄに、平歯車４５の軸方向から圧入される。ここで、平歯車４５の径方向内側を肉厚部４５ｂとし、平歯車４５の径方向外側を薄肉部４５ｅとすることで、これによっても平歯車４５の軽量化を実現している。 As shown in FIG. 8, a total of four fixed claws 55c (only two are shown in FIG. 8) extending in the axial direction of the spur gear 45 are integrally provided on the inner peripheral portion of the relay plate 55. When the relay plate 55 is mounted on the upper surface portion 45c of the spur gear 45, each fixed claw 55c is inserted into the press-fit portion 45d provided in the thick portion 45b on the radially inner side of the spur gear 45 in the axial direction of the spur gear 45. It is press-fitted from. Here, the radial inner side of the spur gear 45 is a thick portion 45b, and the radial outer side of the spur gear 45 is a thin portion 45e, which also reduces the weight of the spur gear 45.
　このように、リレープレート５５は、各固定爪５５ｃを各圧入部４５ｄに圧入するだけで簡単に装着することができる。つまり、装着後に固定爪を折り曲げる必要が無い。これによってもワイパモータ１５の組み立て作業性を向上させている。ここで、リレープレート５５は平歯車４５の上面部４５ｃに装着され、かつリレープレート５５には各コンタクトプレート５１，５２，５３が押し付けられる。よって、リレープレート５５には、平歯車４５から外れる方向に力が作用しない。したがって、リレープレート５５の平歯車４５の上面部４５ｃへの固定強度は、上述のような圧入固定のみで十分である。 Thus, the relay plate 55 can be easily mounted only by press-fitting each fixing claw 55c into each press-fitting portion 45d. That is, it is not necessary to bend the fixing claw after mounting. This also improves the assembly workability of the wiper motor 15. Here, the relay plate 55 is mounted on the upper surface portion 45 c of the spur gear 45, and the contact plates 51, 52, 53 are pressed against the relay plate 55. Therefore, no force acts on the relay plate 55 in the direction away from the spur gear 45. Therefore, the fixing strength of the relay plate 55 to the upper surface portion 45c of the spur gear 45 is sufficient only by the press fitting as described above.
　ここで、各コンタクトプレート５１，５２，５３およびリレープレート５５は、各ワイパアーム１３ａ，１３ｂ（図１参照）を、運転者等による操作スイッチ（図示せず）の操作状態に依らず、所定の停止位置に停止させるための機能を有するものである。具体的には、図７を用いて説明すると、第２コンタクトプレート５２および第３コンタクトプレート５３が、いずれもリレープレート５５上を摺接して互いに電気的に接続された状態のもとで操作スイッチがオフ操作されても、第２コンタクトプレート５２と第３コンタクトプレート５３との電気的な接続によりワイパモータ１５の回転が継続される。 Here, the contact plates 51, 52, 53 and the relay plate 55 stop the wiper arms 13a, 13b (see FIG. 1) for a predetermined stop regardless of the operation state of the operation switch (not shown) by the driver or the like. It has a function for stopping at a position. Specifically, referring to FIG. 7, the operation switch is in a state where both the second contact plate 52 and the third contact plate 53 are slidably contacted on the relay plate 55 and electrically connected to each other. Even when is turned off, the rotation of the wiper motor 15 is continued by the electrical connection between the second contact plate 52 and the third contact plate 53.
　その後、ワイパモータ１５の回転の継続により、図７に示す状態、つまり、第１コンタクトプレート５１と第２コンタクトプレート５２とが互いに電気的に接続された状態となる。すると、ワイパモータ１５の電気系統に閉回路（図示せず）が形成され、これによりワイパモータ１５にブレーキが掛かり、ひいてはワイパモータ１５が速やかに停止される。これにより、各ワイパアーム１３ａ，１３ｂが所定の停止位置で停止される。 Thereafter, as the wiper motor 15 continues to rotate, the state shown in FIG. 7, that is, the first contact plate 51 and the second contact plate 52 are electrically connected to each other. Then, a closed circuit (not shown) is formed in the electric system of the wiper motor 15, whereby the wiper motor 15 is braked, and the wiper motor 15 is quickly stopped. Thereby, each wiper arm 13a, 13b is stopped at a predetermined stop position.
　以上詳述したように、本実施の形態に係るワイパモータ１５によれば、平歯車４５の軸方向に沿う厚み寸法ｈ１が、ギヤケース４１を平歯車４５の軸方向と直交する方向から見たときに、ギヤケース４１に隠される寸法としたので、ギヤケース４１の開口部４１ｃにギヤカバー４２を装着する際に、ギヤカバー４２が平歯車４５に接触するのを抑制できる。よって、ワイパモータ１５の組み付け性を向上させて歩留まりを良くすることができる。また、平歯車４５の厚みを薄くしてワイパモータ１５を小型軽量化することができ、ワイパモータ１５の仕様を非降雪地域向けに簡素化することができる。 As described above in detail, according to the wiper motor 15 according to the present embodiment, the thickness dimension h1 along the axial direction of the spur gear 45 is determined when the gear case 41 is viewed from a direction orthogonal to the axial direction of the spur gear 45. Since the dimensions are hidden by the gear case 41, the gear cover 42 can be prevented from coming into contact with the spur gear 45 when the gear cover 42 is attached to the opening 41c of the gear case 41. Therefore, the assembly property of the wiper motor 15 can be improved and the yield can be improved. Further, the thickness of the spur gear 45 can be reduced to reduce the size and weight of the wiper motor 15, and the specification of the wiper motor 15 can be simplified for non-snowfall areas.
　また、本実施の形態に係るワイパモータ１５によれば、ギヤカバー４２の内側に、平歯車４５の上面部４５ｃに向けて延びる各コンタクトプレート５１，５２，５３が設けられ、平歯車４５の上面部４５ｃに、各コンタクトプレート５１，５２，５３の各接点部５１ｃ，５２ｃ，５３ｃが摺接するリレープレート５５が設けられる。そして、各コンタクトプレート５１，５２，５３に、その長手方向に沿って延びる凹凸よりなる第１補強部５１ｄ，５２ｄ，第２補強部５１ｅ，５２ｅ，補強部５３ｄをそれぞれ設けた。よって、各コンタクトプレート５１，５２，５３が捻れるのを防止して、各接点部５１ｃ，５２ｃ，５３ｃをリレープレート５５に対して確実に電気的に接触させることができる。 Further, according to the wiper motor 15 according to the present embodiment, the contact plates 51, 52, 53 extending toward the upper surface portion 45c of the spur gear 45 are provided inside the gear cover 42, and the upper surface portion 45c of the spur gear 45 is provided. In addition, a relay plate 55 is provided in which the contact portions 51c, 52c, 53c of the contact plates 51, 52, 53 are in sliding contact. Each contact plate 51, 52, 53 is provided with first reinforcing portions 51d, 52d, second reinforcing portions 51e, 52e, and reinforcing portions 53d made of irregularities extending along the longitudinal direction. Therefore, the contact plates 51, 52, 53 can be prevented from being twisted, and the contact portions 51 c, 52 c, 53 c can be reliably brought into electrical contact with the relay plate 55.
　また、本実施の形態に係るワイパ装置１２によれば、ワイパモータ１５により揺動される各ワイパアーム１３ａ，１３ｂおよび各ワイパブレード１８ａ，１８ｂと、平歯車４５の回転中心に設けた出力軸１６との間に、出力軸１６の動力を各ワイパアーム１３ａ，１３ｂおよび各ワイパブレード１８ａ，１８ｂに伝達する連結ロッド２１および駆動ロッド２３を設け、連結ロッド２１および駆動ロッド２３を鋼板をプレス加工することで形成し、連結ロッド２１および駆動ロッド２３の長手方向と直交する方向の断面形状を凹形状とした。よって、連結ロッド２１および駆動ロッド２３の剛性を下げつつ軽量化することができ、非降雪地域向けのワイパ装置１２を実現できる。 Further, according to the wiper device 12 according to the present embodiment, the wiper arms 13 a and 13 b and the wiper blades 18 a and 18 b that are swung by the wiper motor 15, and the output shaft 16 provided at the rotation center of the spur gear 45. A connecting rod 21 and a driving rod 23 for transmitting the power of the output shaft 16 to the wiper arms 13a and 13b and the wiper blades 18a and 18b are provided, and the connecting rod 21 and the driving rod 23 are formed by pressing a steel plate. And the cross-sectional shape of the direction orthogonal to the longitudinal direction of the connecting rod 21 and the drive rod 23 was made into concave shape. Therefore, it is possible to reduce the weight while reducing the rigidity of the connecting rod 21 and the drive rod 23, and it is possible to realize the wiper device 12 for non-snowfall areas.
　さらに、本実施の形態に係るワイパ装置１２によれば、運転席側ワイパアーム１３ａおよび運転席側ワイパブレード１８ａが一端側に装着され、連結ロッド２１および駆動ロッド２３が運転席側駆動プレート２０ａを介して他端側に装着される運転席側ワイパ軸１４ａを、樹脂製の運転席側ピボットホルダ１９ａに回転自在に支持させた。これによりワイパ装置１２を、さらに軽量化することができる。 Further, according to the wiper device 12 according to the present embodiment, the driver's seat side wiper arm 13a and the driver's seat side wiper blade 18a are mounted on one end side, and the connecting rod 21 and the drive rod 23 are disposed via the driver's seat side drive plate 20a. Then, the driver's seat side wiper shaft 14a mounted on the other end side was rotatably supported by a resin driver's seat side pivot holder 19a. Thereby, the wiper apparatus 12 can be further reduced in weight.
　本発明は上記実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能であることは言うまでもない。例えば、上記実施の形態においては、ワイパモータ１５を、フロントウインドガラス１１を払拭するワイパ装置１２に適用したものを示したが、本発明はこれに限らず、車両のリヤウインドガラスを払拭するワイパ装置にも適用することができる。さらには、自動車等の車両に限らず、航空機や船舶，鉄道車両，建設機械等に搭載されるワイパ装置にも適用することができる。 It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above embodiment, the wiper motor 15 is applied to the wiper device 12 for wiping the front window glass 11. However, the present invention is not limited to this, and the wiper device for wiping the rear window glass of the vehicle is used. It can also be applied to. Furthermore, the invention can be applied not only to vehicles such as automobiles but also to wiper devices mounted on airplanes, ships, railway vehicles, construction machines and the like.
　また、上記実施の形態においては、ワイパモータ１５の一例として、ブラシ付きのモータであるものを示したが、本発明はこれに限らず、ブラシレスのモータ等であっても構わない。 In the above embodiment, the wiper motor 15 is an example of a motor with a brush. However, the present invention is not limited to this and may be a brushless motor or the like.
　ワイパモータおよびワイパ装置は、自動車等に設けられるウィンドシールドをワイパ部材で払拭し、運転者等の視界を良好にするのに用いられる。 A wiper motor and a wiper device are used for wiping a windshield provided in an automobile or the like with a wiper member to improve visibility of a driver or the like.

Claims (4)

  1. 　ウォームを有するアーマチュアと、
    　前記アーマチュアを回転自在に収容するモータケースと、
    　前記ウォームを収容し、前記モータケースに連結される開口部を有するギヤケースと、
    　前記ギヤケースの前記開口部を閉塞するギヤカバーと、
    　前記ギヤケースに収容され、前記ウォームに噛み合わされる第１歯部と、当該第１歯部の同軸上に設けられる第２歯部と、をそれぞれ備えた第１ギヤおよび第２ギヤと、
    　前記ギヤケースに収容され、前記第１ギヤおよび前記第２ギヤの前記第２歯部に噛み合わされる第３歯部を備えた第３ギヤと、
    を有するワイパモータであって、
    　前記第３ギヤの軸方向に沿う厚み寸法は、前記ギヤケースを前記第３ギヤの軸方向と直交する方向から見たときに、前記第３ギヤが前記ギヤケースで隠される寸法とされる、ワイパモータ。     An armature with a worm;
    A motor case for rotatably accommodating the armature;
    A gear case that houses the worm and has an opening coupled to the motor case;
    A gear cover that closes the opening of the gear case;
    A first gear and a second gear each provided with a first tooth portion housed in the gear case and meshed with the worm, and a second tooth portion provided coaxially with the first tooth portion;
    A third gear having a third tooth portion housed in the gear case and meshed with the second tooth portion of the first gear and the second gear;
    A wiper motor having
    The thickness dimension along the axial direction of the third gear is a wiper motor in which the third gear is hidden by the gear case when the gear case is viewed from a direction perpendicular to the axial direction of the third gear.
  2. 　請求項１記載のワイパモータにおいて、
    　前記ギヤカバーの内側に、前記第３ギヤの一方の側面に向けて延びる複数の導電部材が設けられ、
    　前記第３ギヤの一方の側面に、前記導電部材の先端部が摺接する導電板が設けられ、
    　前記導電部材に、当該導電部材の剛性を高める補強部が設けられる、ワイパモータ。     The wiper motor according to claim 1,
    A plurality of conductive members extending toward one side surface of the third gear are provided inside the gear cover,
    On one side surface of the third gear, a conductive plate is provided in which the tip of the conductive member is in sliding contact,
    A wiper motor, wherein the conductive member is provided with a reinforcing portion that increases the rigidity of the conductive member.
  3. 　ウォームを有するアーマチュアと、
    　前記アーマチュアを回転自在に収容するモータケースと、
    　前記ウォームを収容し、前記モータケースに連結される開口部を有するギヤケースと、
    　前記ギヤケースの前記開口部を閉塞するギヤカバーと、
    　前記ギヤケースに収容され、前記ウォームに噛み合わされる第１歯部と、当該第１歯部の同軸上に設けられる第２歯部と、をそれぞれ備えた第１ギヤおよび第２ギヤと、
    　前記ギヤケースに収容され、前記第１ギヤおよび前記第２ギヤの前記第２歯部に噛み合わされる出力軸を有する第３歯部を備えた第３ギヤと、
    を有するワイパモータを備えたワイパ装置であって、
    　前記第３ギヤの軸方向に沿う厚み寸法は、前記ギヤケースを前記第３ギヤの軸方向と直交する方向から見たときに、前記第３ギヤが前記ギヤケースで隠される寸法とされ、
    　前記ワイパモータにより揺動されるワイパ部材と、前記第３ギヤの回転中心に設けられる前記出力軸との間に、前記出力軸の動力を前記ワイパ部材に伝達する動力伝達部材が設けられ、
    　前記動力伝達部材は鋼板をプレス加工して形成され、前記動力伝達部材の長手方向と直交する方向の断面形状が凹形状とされる、ワイパ装置。     An armature with a worm;
    A motor case for rotatably accommodating the armature;
    A gear case that houses the worm and has an opening coupled to the motor case;
    A gear cover that closes the opening of the gear case;
    A first gear and a second gear each provided with a first tooth portion housed in the gear case and meshed with the worm, and a second tooth portion provided coaxially with the first tooth portion;
    A third gear comprising a third tooth portion housed in the gear case and having an output shaft engaged with the second tooth portion of the first gear and the second gear;
    A wiper device comprising a wiper motor having
    The thickness dimension along the axial direction of the third gear is a dimension such that the third gear is hidden by the gear case when the gear case is viewed from a direction orthogonal to the axial direction of the third gear.
    A power transmission member for transmitting the power of the output shaft to the wiper member is provided between the wiper member swung by the wiper motor and the output shaft provided at the rotation center of the third gear.
    The wiper device, wherein the power transmission member is formed by pressing a steel plate, and a cross-sectional shape perpendicular to a longitudinal direction of the power transmission member is a concave shape.
  4. 　請求項３記載のワイパ装置において、
    　一端側に前記ワイパ部材が装着され、他端側に前記動力伝達部材が装着されるワイパ軸を有し、
    　前記ワイパ軸は、樹脂製のピボットホルダにより回転自在に支持される、ワイパ装置。     The wiper device according to claim 3, wherein
    The wiper member is attached to one end side, and the wiper shaft is attached to the power transmission member on the other end side,
    The wiper shaft is a wiper device that is rotatably supported by a resin-made pivot holder.
PCT/JP2014/079530 2014-11-07 2014-11-07 Wiper motor and wiper device WO2016072008A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/079530 WO2016072008A1 (en) 2014-11-07 2014-11-07 Wiper motor and wiper device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/079530 WO2016072008A1 (en) 2014-11-07 2014-11-07 Wiper motor and wiper device

Publications (1)

Publication Number Publication Date
WO2016072008A1 true WO2016072008A1 (en) 2016-05-12

Family

ID=55908760

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/079530 WO2016072008A1 (en) 2014-11-07 2014-11-07 Wiper motor and wiper device

Country Status (1)

Country Link
WO (1) WO2016072008A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61113062U (en) * 1984-12-28 1986-07-17
JP2004058874A (en) * 2002-07-30 2004-02-26 Mitsuba Corp Wiper device for vehicle
JP2007069905A (en) * 2006-12-01 2007-03-22 Mitsuba Corp Wiper motor
JP2009522149A (en) * 2005-12-28 2009-06-11 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Window glass wiper device
JP2010110115A (en) * 2008-10-30 2010-05-13 Mitsuba Corp Electric motor with reduction gear
JP2011121565A (en) * 2009-12-14 2011-06-23 Mitsuba Corp Wiper apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61113062U (en) * 1984-12-28 1986-07-17
JP2004058874A (en) * 2002-07-30 2004-02-26 Mitsuba Corp Wiper device for vehicle
JP2009522149A (en) * 2005-12-28 2009-06-11 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Window glass wiper device
JP2007069905A (en) * 2006-12-01 2007-03-22 Mitsuba Corp Wiper motor
JP2010110115A (en) * 2008-10-30 2010-05-13 Mitsuba Corp Electric motor with reduction gear
JP2011121565A (en) * 2009-12-14 2011-06-23 Mitsuba Corp Wiper apparatus

Similar Documents

Publication Publication Date Title
JP4981340B2 (en) Motor with reduction gear
JP6634372B2 (en) Brushless wiper motor
US8819888B2 (en) Wiper apparatus
WO2013038848A1 (en) Wiper device
JP6441814B2 (en) Wiper device
JP6017403B2 (en) Floating member and wiper device
US20070234847A1 (en) Motor with reduction gear
WO2016072008A1 (en) Wiper motor and wiper device
JP6095662B2 (en) Wiper motor
JP2008247171A (en) Wiper motor
JP6172962B2 (en) Wiper device
JP6552364B2 (en) Support device
JP2007196959A (en) Vehicular wiper device
JP4950909B2 (en) Wiper device
CN107848491B (en) Wiper motor and windscreen wiper system for cleaning vehicle windows
JP6527752B2 (en) Support device and wiper device
JP5706426B2 (en) Wiper device
JP2007259605A (en) Motor with decelerator mechanism
JP5619661B2 (en) Wiper device
US8910341B2 (en) Wiper device having improved vibration prevention of wiper strip
JP4843542B2 (en) Wiper motor
KR20130056679A (en) Wiper apparatus enhancing mount structure for a vehicle
KR101306260B1 (en) Wiper motor apparatus
JP6393205B2 (en) Wiper device
JP2011084252A (en) Wiper motor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14905359

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 14905359

Country of ref document: EP

Kind code of ref document: A1