JP6464923B2 - Water receiving structure for vehicle wiper device - Google Patents

Description

  The present invention relates to a water receiving structure for a vehicle wiper device.

  In the vehicle wiper device described in Patent Document 1 below, the base end portion of the wiper arm is directly fixed to the output shaft of the wiper motor. For this reason, it is necessary to prevent the wiper motor from getting wet with water or the like flowing from the base end side of the wiper arm to the wiper motor side. Accordingly, it is described in the vehicle wiper device that a waterproof cap (water receiving member) can be provided on the vehicle wiper device.

  In the above-described vehicle wiper device, since the wiper arm is directly fixed to the output shaft of the wiper motor, the wiper motor is controlled to rotate forward and backward, and the wiper arm is reciprocally rotated around the axis of the output shaft. For this reason, in order to prevent the wiper arm from turning larger than the set turning angle, a mechanism for limiting the turning of the wiper arm at a predetermined position is provided. Specifically, a terminal stopper surface is formed on a fixing plate for fixing the wiper motor to the vehicle body, and a corresponding stopper surface configured to be able to contact the terminal stopper surface is formed on the wiper arm.

Special table 2011-506169 gazette

  However, although it is described in the above-described vehicle wiper device that a waterproof cap can be provided, the specific configuration of the waterproof cap is not described. Further, since the wiper arm and the fixing plate are usually made of metal, there is a problem that relatively large noise is generated when the corresponding stopper surface hits the terminal stopper surface. For this reason, it is desirable for such a vehicle wiper device to have a structure that can achieve both waterproofness against the wiper motor and reduction of abnormal noise.

  In view of the above-described facts, an object of the present invention is to provide a water receiving structure for a vehicle wiper device that can achieve both waterproofness against a wiper motor and reduction of noise.

  The water receiving structure of the vehicle wiper device according to the present disclosure includes an output shaft that outputs driving force, and a sleeve that rotatably supports the output shaft in a state in which a tip portion of the output shaft protrudes to the outside. A wiper motor having a housing, a base end portion fixed to a distal end portion of the output shaft, a wiper arm reciprocatingly rotated around the axis of the output shaft by rotating the output shaft, and a base end portion of the wiper arm And a rotation part configured to be integrally rotatable, and is provided on the housing and protrudes from the housing to the distal end side of the output shaft, and is directed to one side of the wiper arm in the rotation direction or the other side of the rotation direction. A stopper for restricting rotation, a cap portion that is mounted on the distal end side of the output shaft and covers the sleeve, and the cap portion between the wiper arm and the housing. A water receiving portion extending outward in the radial direction of the shaft and blocking liquid flowing from the base end side of the wiper arm to the housing side, and extending from the water receiving portion to the vehicle lower side on the side of the housing A water receiving member configured to discharge the liquid that has been blocked by the water receiving portion to the vehicle lower side on the side of the housing; and the stopper formed in the water receiving portion. And a cover portion that restricts rotation of the wiper arm to one side of the rotation direction or the other side of the rotation direction together with the stopper by contacting the rotation portion.

  According to the above configuration, the wiper motor has the output shaft that outputs the driving force, and the output shaft is rotatably supported by the sleeve formed in the housing. The distal end portion of the output shaft protrudes outside the housing, and the base end portion of the wiper arm is fixed to the distal end portion of the output shaft. Then, as the output shaft rotates, the wiper arm reciprocally rotates around the axis of the output shaft, and the rotating portion reciprocates together with the wiper arm.

  Further, the housing is provided with a stopper that protrudes from the housing toward the distal end side of the output shaft. This stopper is a stopper for restricting the rotation of the wiper arm in one direction of rotation or the rotation of the wiper arm in the other direction.

  Here, the cap portion of the water receiving member is attached to the distal end side of the output shaft and covers the sleeve. The water receiving member extends between the wiper arm and the housing from the cap portion to the radially outer side of the output shaft, and extends from the water receiving portion to the vehicle lower side on the side of the housing. And a discharge part. And the liquid which flows into the housing side from the base end part side of a wiper arm is blocked by the water receiving part, and is discharged to the vehicle lower side by the discharge part. Thereby, it can prevent that a housing (namely, wiper motor) gets wet with the said liquid.

  Moreover, the cover part which covers a stopper is formed in the water receiving part. Then, when the rotating portion comes into contact with the cover portion, the rotation of the wiper arm in one rotation direction or the wiper arm in the other rotation direction is restricted by the cover portion and the stopper. That is, when the rotation of the wiper arm is limited by the cover portion and the stopper, the water receiving member functions as a buffer member. For this reason, the noise which arises when restrict | limiting rotation of a wiper arm can be reduced. As described above, it is possible to achieve both waterproofness against the wiper motor and reduction of abnormal noise.

  Further, in the water receiving structure of the vehicle wiper device according to the present disclosure, the water receiving member moves relative to the housing in the circumferential direction of the output shaft in a state where the water receiving member is mounted on the distal end side of the output shaft. Limited by the stopper.

  According to the above configuration, when the water receiving member is mounted on the distal end side of the output shaft, the position of the water receiving member with respect to the housing in the circumferential direction of the output shaft is determined. Thereby, a stopper can be functioned as positioning of the water receiving member with respect to a housing.

  Further, in the water receiving structure of the vehicle wiper device according to the present disclosure, a bracket for fixing the wiper motor to a vehicle body is provided between the water receiving portion and the housing, and the bracket It is fixed to the housing around the shaft.

  According to the said structure, it can prevent with the water receiving member that the fixing | fixed part to the housing of a bracket gets wet.

  In the water receiving structure for a vehicle wiper device according to the present disclosure, the bracket is fixed to the housing by a plurality of fixing members arranged at a predetermined interval in the circumferential direction of the output shaft, The receiving portion is formed with a receiving portion that bulges toward the distal end side of the output shaft and receives the head of the fixing member.

  According to the above configuration, the bracket is fixed to the housing by the plurality of fixing members, and the plurality of fixing members are arranged at predetermined intervals in the circumferential direction of the output shaft. Further, the water receiving portion is formed with a housing portion bulging toward the tip end side of the output shaft, and the head portion of the fixing member is housed in the housing portion. For this reason, in a state where the water receiving member is mounted on the distal end side of the output shaft, the fixing member can suppress the water receiving member from rotating in the circumferential direction of the output shaft with respect to the bracket. Thereby, a fixing member can be functioned as a rotation stop with respect to the bracket of a water receiving member.

  Further, in the water receiving structure of the vehicle wiper device according to the present disclosure, the water receiving member is formed with a hook portion that is engaged with the bracket and restricts movement of the output shaft toward the distal end side of the bracket. Yes.

  According to the above configuration, in a state where the water receiving member is mounted on the distal end side of the output shaft, the movement of the water receiving member relative to the bracket to the distal end side of the output shaft can be restricted.

  Further, in the water receiving structure for the vehicle wiper device according to the present disclosure, the bracket has an arrangement hole for arranging the sleeve therein, and the water receiving portion projects toward the bracket. And the protrusion part which contact | abuts to the internal peripheral surface of the said arrangement | positioning hole and restrict | limits the movement to the radial direction outer side of the said output shaft in the said water receiving member is formed.

  According to the above configuration, in a state where the water receiving member is mounted on the distal end side of the output shaft, it is possible to limit the movement of the water receiving member to the outer side in the radial direction with respect to the bracket.

  In the water receiving structure for a vehicle wiper device according to the present disclosure, the wiper motor includes a power system element and a control system element, and a control unit that controls the rotation of the output shaft is accommodated in the housing. The housing includes a heat sink formed on one side of the sleeve so as to correspond to the power system element and radiates heat of the power system element. The discharge portion is disposed on the side opposite to the heat sink.

  According to the above configuration, the heat generated from the power element of the control unit is transmitted to the heat sink and radiated. At this time, since the discharge part of the water receiving member is disposed on the opposite side of the heat sink with respect to the output shaft, the heat dissipation effect of the heat sink by the discharge part is prevented and thermal deformation due to the heat sink contact of the water receiving member is prevented. Can also be prevented.

FIG. 1 is a perspective view of the periphery of the base end portion of the wiper arm when the wiper arm used in the vehicle wiper device according to the present embodiment is disposed at the lower limit position, as viewed from the front side of the device. 2 is a perspective view of the periphery of the base end portion of the wiper arm shown in FIG. 1 as seen from the rear side of the apparatus. FIG. 3 is a front view of the entire vehicle wiper device according to the present embodiment as viewed from the front side of the vehicle. 4 is an enlarged plan view of the wiper motor shown in FIG. 3 as viewed from the upper side of the apparatus, showing an enlarged view of a state where the wiper motor is fixed to the bracket. FIG. 5 is a front view of the wiper motor fixed to the bracket shown in FIG. 4 as viewed from the front side of the apparatus. 6 is an enlarged perspective view showing the periphery of the output shaft of the wiper motor shown in FIG. 7 is a side cross-sectional view (cross-sectional view taken along the line 7-7 in FIG. 1) viewed from one axial side of the rotary shaft, showing the periphery of the base end portion of the wiper arm shown in FIG. FIG. 8 is a perspective view of the wiper arm and the water receiving member shown in FIG. FIG. 9 is a perspective view seen from the upper side of the apparatus showing a state before the water receiving member shown in FIG. 7 is mounted on the distal end side of the output shaft. FIG. 10 is a perspective view of the periphery of the water receiving member shown in FIG.

  Hereinafter, the vehicle wiper device 10 to which the water receiving structure S of the vehicle wiper device according to the present embodiment is applied will be described with reference to the drawings. As shown in FIG. 3, the vehicle wiper device 10 is configured as a wiper device that wipes the glass surface of a front windshield glass 120 (hereinafter referred to as a front WS glass 120) of the vehicle V. Hereinafter, the periphery of the front WS glass 120 in the vehicle V will be described first, and then the vehicle wiper device 10 will be described.

  As shown in FIG. 7, the front WS glass 120 is disposed so as to be inclined toward the rear side of the vehicle as it goes toward the upper side of the vehicle in a side view as viewed from the vehicle width direction of the vehicle V. Note that an arrow FR shown in FIG. 7 indicates the front side of the vehicle, and an arrow UP indicates the upper side of the vehicle.

  A cowl louver 122 is provided on the front side of the front WS glass 120 in the vehicle. The cowl louver 122 extends in the vehicle width direction of the vehicle V along the lower edge portion of the front WS glass 120, and the lower edge portion of the front WS glass 120 so as to be substantially parallel to the front WS glass 120 in a side view. It protrudes from the vehicle front side. The cowl louver 122 is integrally formed with an arrangement portion 124 for arranging an output shaft 56 of the wiper motor 12 described later. Arrangement portion 124 is formed in a substantially cylindrical shape whose axial direction is substantially perpendicular to the glass surface of front WS glass 120, and extends from cowl louver 122 to the inside of vehicle V. And the hole of the arrangement | positioning part 124 is made into the arrangement | positioning hole 124A, and the arrangement | positioning hole 124A connects the inner side and the outer side of the vehicle V. FIG. In addition, the arrangement | positioning part 124 is arrange | positioned along with the vehicle width direction while forming two places in the cowl louver 122 corresponding to a pair of wiper motor 12 mentioned later.

(Vehicle wiper device 10)
As shown in FIG. 3, the vehicle wiper device 10 is configured as a so-called tandem type wiper device. Specifically, the vehicle wiper device 10 includes a pair of wiper motors 12 arranged side by side in the vehicle width direction of the vehicle V, a pair of wiper arms 80 fixed to the output shaft 56 of each wiper motor 12, and each wiper arm 80. And a pair of wiper blades 90 connected to the distal end portion. As shown in FIGS. 1 and 2, the vehicle wiper device 10 has a bracket 70 for fixing the wiper motor 12 to the vehicle body of the vehicle V, and prevents the wiper motor 12 from being exposed to liquid such as water. And a water receiving member 100 for the purpose.

  As shown in FIG. 3, in the vehicle wiper device 10, when the pair of wiper motors 12 are driven, the pair of wiper arms 80 are reciprocally rotated around the output shaft 56 of the wiper motor 12 in the same direction. The glass surface of the front WS glass 120 is wiped by the wiper blade 90. Specifically, the output shaft 56 of the wiper motor 12 reciprocally rotates, so that the wiper arm 80 is positioned between the lower reverse position (the position indicated by the two-dot chain line in FIG. 3) and the upper reverse position (the position indicated by the solid line in FIG. 3). Are reciprocally rotated. Then, the direction in which the wiper arm 80 moves from the lower inversion position to the upper inversion position (the direction of arrow a in FIG. 3) is one side of the rotation direction (the forward movement side of the reciprocating rotation), The direction (the direction of the arrow b in FIG. 3) is the other side of the rotation direction (return side of reciprocating rotation). When the wiper motor 12 stops, the wiper arm 80 is set to stop at the lower reverse position. That is, in the present embodiment, the lower inversion position of the wiper arm 80 and the stop position are set to coincide. Hereinafter, the configuration of the vehicle wiper device 10 will be described.

(About wiper motor 12)
As shown in FIG. 7, the wiper motor 12 is disposed inside the vehicle V with respect to the cowl louver 122. Further, the wiper motor 12 is disposed so as to be inclined with respect to the vehicle body in a side view (viewed in the axial direction of the rotary shaft 20 described later) corresponding to the inclination of the front WS glass 120. For this reason, in the following description, the direction orthogonal to the glass surface of the front WS glass 120 in a side view is referred to as the device vertical direction (the direction of arrow A and the direction of arrow B in FIG. 7), and the arrow A direction side is the device upper side The arrow B direction side is the apparatus lower side. Further, a direction orthogonal to the vertical direction of the apparatus in a side view is referred to as an apparatus longitudinal direction (arrow C direction and arrow D direction in FIG. 7), the arrow C direction side is the apparatus rear side, and the arrow D direction side is the apparatus front side. It is said.

  As shown in FIG. 4, the wiper motor 12 includes a motor body 14 configured as a so-called brushed DC motor, a motor housing 24, and a reduction mechanism 50 for reducing the rotation of the motor body 14. Has been. Further, the wiper motor 12 has a control unit 60 (see FIG. 7) for controlling the rotation of the motor main body 14.

(About motor body 14)
The motor body 14 includes a substantially bottomed cylindrical motor yoke 16 whose axial direction is substantially the vehicle width direction of the vehicle V. In the opening of the motor yoke 16, an enlarged diameter portion 16A that is enlarged outward in the radial direction is formed. A plurality of permanent magnets (not shown) are fixed to the inner peripheral surface of the motor yoke 16, and the permanent magnets are arranged so that the magnetic poles are alternately different along the circumferential direction of the motor yoke 16.

  An armature 18 is rotatably accommodated in the motor yoke 16 inside the permanent magnet. The armature 18 includes a rotating shaft 20, and the rotating shaft 20 is formed in a substantially round bar shape and is arranged coaxially with the motor yoke 16. An end portion on one axial side of the rotating shaft 20 (arrow E direction side in FIG. 4) is rotatably supported on the bottom portion of the motor yoke 16 via a bearing (not shown). On the other hand, a portion on the other axial side of the rotary shaft 20 (arrow F direction side in FIG. 4) is disposed in a motor housing 24 described later.

  The motor body 14 includes a brush holder device 22. The brush holder device 22 is formed in a substantially annular shape, and is disposed on the radially outer side of the rotating shaft 20 in the axially intermediate portion of the rotating shaft 20. Further, the brush holder device 22 includes a plurality of brushes (not shown), and these brushes are in contact with a commutator (not shown) of the armature 18 so as to be slidable.

(About motor housing 24)
The motor housing 24 is formed in a substantially box shape and is disposed on the opening side of the motor yoke 16 with respect to the motor yoke 16. As shown in FIG. 5, the motor housing 24 is divided into two parts in the axial direction of the output shaft 56 (the vertical direction of the apparatus). That is, the motor housing 24 includes a gear housing 26 as a “housing” that constitutes the upper portion of the motor housing 24 and a cover plate 40 that constitutes the lower portion of the motor housing 24. .

  The gear housing 26 is made of metal (for example, made of aluminum alloy), and is manufactured by die casting or the like, and is generally box-shaped and opened to the lower side of the device (the side opposite to the protruding side of the output shaft 56). Is formed. As shown in FIG. 4, the portion on the other axial side of the rotary shaft 20 of the motor body 14 described above is disposed in the motor housing 24, and the other axial end of the rotary shaft 20 is connected to the gear housing 26. It is supported rotatably.

  The gear housing 26 is integrally formed with a holder accommodating portion 28 for accommodating and supporting the brush holder device 22 of the motor main body 14 described above. The holder housing portion 28 is disposed at a position facing the opening of the motor yoke 16 described above, and has a substantially bottomed cylindrical shape opened to one axial side of the rotating shaft 20 (the direction of arrow E in FIG. 4). Is formed. The holder housing portion 28 is fastened and fixed to the opening portion (the enlarged diameter portion 16A) of the motor yoke 16 in a stamped joint state, whereby the opening portion of the motor yoke 16 is closed. A through hole (not shown) is formed in the bottom wall of the holder housing portion 28 in the axial direction of the rotary shaft 20, and the rotary shaft 20 extends from the holder housing portion 28 side (motor yoke 16 side) into the through hole. Is inserted.

  As shown in FIG. 6, the gear housing 26 is integrally formed with a heat sink 30 on the outer surface of the gear housing. The heat sink 30 is arranged on the rear side of the apparatus with respect to the axis AL (see FIG. 4) of the rotary shaft 20 (specifically, on the side opposite to the side where the output shaft 56 described later is arranged). . The heat sink 30 is configured to include a plurality of (in this embodiment, four) radiating fins 30A, and the radiating fins 30A are arranged with the axial direction of the rotary shaft 20 as the plate thickness direction and rotate. 4 are arranged side by side in the axial direction of the shaft 20 (note that only one heat radiation fin 30A is shown in FIG. 4, and only three heat radiation fins 30A are shown in FIG. ing). As a result, a recess is formed between adjacent radiating fins 30 </ b> A that opens to the axial front end side (device upper side) of the output shaft 56 described later. As shown in FIG. 7, the heat sink 30 has a heat receiving surface 30 </ b> B that receives heat generated by the control unit 60 described later on the inner side of the gear housing. The heat receiving surface 30B is formed at a position facing a power element 64A on a circuit board 62 described later.

  As shown in FIG. 6, the gear housing 26 is formed with a support portion 32 for supporting an output shaft 56 described later. The support portion 32 is disposed on the front side of the apparatus (in the direction of arrow D in FIG. 7 and opposite to the heat sink 30) with respect to the axis AL (not shown in FIG. 6) of the rotary shaft 20. The support portion 32 is formed in a substantially cylindrical shape protruding from the gear housing 26 to the upper side of the apparatus, and is disposed coaxially with the arrangement hole 124A of the cowl louver 122. Specifically, the support portion 32 includes a support base end portion 32A that constitutes the base end portion of the support portion 32, and a sleeve 32B that constitutes the distal end portion of the support portion 32, and the sleeve 32B. Is set smaller than the diameter of the support base end portion 32A.

  Further, as shown in FIG. 7, a pair of substantially cylindrical ball bearings 34 is fitted inside the support base end portion 32A. The pair of ball bearings 34 are arranged side by side in the vertical direction of the device (the axial direction of the output shaft 56 described later) with the axial direction being the vertical direction of the device. The outer diameter of the ball bearing 34 is the inner diameter of the sleeve 32B. It is set to be approximately the same as the dimensions.

  Further, as shown in FIG. 5, the gear housing 26 is integrally provided with a plurality of (three in the present embodiment) bosses 36 for fixing brackets 70 described later on the radially outer side of the support portion 32. (In FIG. 5, only two bosses 36 are shown). The boss 36 is formed in a substantially cylindrical shape having the vertical direction of the apparatus as an axial direction, protrudes from the gear housing 26 to the upper side of the apparatus, and is disposed at a predetermined interval in the circumferential direction of the support portion 32. . And the internal thread of the boss | hub 36 is formed with the internal thread in which the fixing bolts B1-B3 mentioned later are screwed together. Furthermore, the upper end surface of the boss 36 is disposed below the apparatus from the upper end of the holder accommodating portion 28, and in a state where a bracket 70 described later is fixed to the boss 36, the bracket 70 is more than the upper end of the holder accommodating portion 28. Is also arranged below the apparatus.

  Further, as shown in FIG. 6, a stopper 38 for restricting the rotation of a wiper arm 80 described later is erected on the upper surface of the support base end portion 32 </ b> A of the gear housing 26. The stopper 38 is formed in a substantially C-shaped block shape, and is formed integrally with the sleeve 32B along the outer peripheral side surface of the sleeve 32B on the one axial side of the rotating shaft 20 (the arrow E direction side in FIG. 6). ing. That is, the stopper 38 protrudes radially outward from the outer peripheral side surface of the sleeve 32B. Further, the outer peripheral surface of the stopper 38 coincides with the outer peripheral surface of the support base end portion 32A. Further, the end surface on one side in the longitudinal direction of the stopper 38 viewed from the distal end side of the sleeve 32B is a first stopper surface 38A. The first stopper surface 38A is disposed along a direction orthogonal to the circumferential direction of the sleeve 32B, and is a stopper for restricting rotation of the wiper arm 80 in one rotational direction at an upper limit position described later. It is configured as a surface. On the other hand, the end surface on the other side in the longitudinal direction of the stopper 38 viewed from the distal end side of the sleeve 32B is a second stopper surface 38B. Similar to the first stopper surface 38A, the second stopper surface 38B is disposed along the direction orthogonal to the circumferential direction of the sleeve 32B, and toward the other side in the rotational direction of the wiper arm 80 at the lower limit position described later. It is comprised as a stopper surface for restricting the rotation of.

  As shown in FIG. 7, the cover plate 40 is made of an insulating resin material. The cover plate 40 has a substantially rectangular parallelepiped box shape opened to the gear housing 26 side (device upper side) and is formed in a shape corresponding to the shape of the opening of the gear housing 26. The opening of the gear housing 26 is closed by the cover plate 40.

(About the deceleration mechanism 50)
As shown in FIGS. 4 and 7, the speed reduction mechanism 50 includes a worm 52, a worm wheel 54, and an output shaft 56. The worm 52 is integrally formed with a portion on the other axial side of the rotating shaft 20 (portion accommodated in the gear housing 26).

  The worm wheel 54 is formed in a substantially disc shape, and is housed in the gear housing 26 so as to be positioned on the front side of the device (the support portion 32 side) with respect to the axis of the worm 52 (that is, the axis AL of the rotary shaft 20). Yes. Specifically, the worm wheel 54 is disposed coaxially with the support portion 32 of the gear housing 26 with the vertical direction of the device as the axial direction. Gear teeth are formed on the outer peripheral portion of the worm wheel 54, and the gear teeth mesh with the worm 52.

  The output shaft 56 is formed in a substantially cylindrical shape whose axial direction is the vertical direction of the apparatus. And the base end part of the output shaft 56 is being fixed to the axial center part of the worm wheel 54, and the output shaft 56 is extended from the worm wheel 54 to the apparatus upper side. Thus, the worm wheel 54 and the output shaft 56 are configured to be integrally rotatable. Further, an intermediate portion in the axial direction of the output shaft 56 is disposed in the support portion 32 of the gear housing 26 and is cantilevered rotatably by the pair of ball bearings 34 and the sleeve 32B. When the motor body 14 is driven, the rotation of the rotary shaft 20 is decelerated by the speed reduction mechanism 50, and the output shaft 56 rotates about its own axis.

  As shown in FIG. 7, the tip end portion of the output shaft 56 protrudes upward from the support portion 32, and the tip end portion of the output shaft 56 is arranged in the arrangement hole 124 </ b> A of the cowl louver 122. . Further, the tip of the output shaft 56 is formed in a step shape. Specifically, a tapered surface 56 </ b> A is formed on the outer peripheral surface at the distal end portion of the output shaft 56. The tapered surface 56A forms a frustoconical circumferential surface that tapers toward the upper side of the apparatus, and the tapered surface 56A is knurled. A portion of the output shaft 56 on the upper side of the device with respect to the tapered surface 56A is a screw portion 56B. The screw portion 56B is formed in a substantially cylindrical shape and protrudes upward from the cowl louver 122 (that is, exposed to the outside of the vehicle V from the arrangement hole 124A), and the outer periphery of the screw portion 56B. The part is formed with a male screw.

(About the control unit 60)
The control unit 60 is for controlling the rotation of the motor main body 14 and includes a circuit board 62 and an electric element 64. The circuit board 62 is fixed to the inner surface side of the cover plate 40 with the axial direction of the output shaft 56 being the plate thickness direction. The cover plate 40 closes the opening of the gear housing 26 so that the circuit board 62 is accommodated in the motor housing 24. In the state where the circuit board 62 is accommodated in the motor housing 24, a heat conductive resin material (not shown) is interposed between the upper surface 62 </ b> A of the circuit board 62 and the heat receiving surface 30 </ b> B of the gear housing 26. This heat conductive resin material is a clay-like adhesive having viscosity and heat conductivity, and thereby, the heat receiving surface 30B and the upper surface 62A of the circuit board 62 are in close contact with each other by the heat conductive resin material. .

  The electric element 64 is mounted on the upper surface 62A and the lower surface 62B of the circuit board 62. The electric element 64 includes a power system element 64A such as an FET for driving and controlling the motor main body 14, and a control system element 64B such as a CPU, a rotation sensor, and a memory for controlling the rotation of the rotary shaft 20 (output shaft 56). ,have. The power element 64 </ b> A is disposed on the lower surface 62 </ b> B of the circuit board 62 and is disposed at a position corresponding to the heat receiving surface 30 </ b> B of the heat sink 30. That is, the power element 64A is disposed at a position overlapping the heat receiving surface 30B in the vertical direction of the apparatus, in other words, at a position facing it. On the other hand, the control system element 64B is divided into an upper surface 62A and a lower surface 62B of the circuit board 62. The controller 60 is electrically connected to the armature 18 via the brush holder device 22 of the motor main body 14, and the motor main body 14 is driven and controlled by the controller 60. Thereby, rotation of the rotating shaft 20 (namely, the output shaft 56) of the motor main body 14 is controlled.

  As shown in FIG. 1, a connector 66 is electrically connected to the circuit board 62, and the connector 66 protrudes from the cover plate 40 to one side in the axial direction of the rotary shaft 20. The connector 66 is formed in a concave shape opened to one side in the axial direction of the rotary shaft 20, and an external connector (not shown) provided in a harness on the vehicle side is connected to the connector 66. ing. Thereby, electric power is supplied to the control unit 60.

(About bracket 70)
As shown in FIGS. 1, 2, 4, and 5, the bracket 70 is made of metal (for example, aluminum alloy), and is manufactured by die casting or the like and is formed in a plate shape. In addition, the bracket 70 is disposed so that the vertical direction of the apparatus is the plate thickness direction as a whole, and is formed so as to cover the wiper motor 12 from the upper side of the apparatus (see FIG. 4). Specifically, when viewed from the upper side of the device, the bracket 70 is formed in a substantially trapezoidal shape, and the width of the front end of the bracket 70 is set to be larger than the width of the rear end of the bracket 70. Has been.

  Further, a first arrangement hole 70A is formed through substantially the central portion of the bracket 70, and the first arrangement hole 70A is substantially rectangular with the direction along the axis AL of the rotary shaft 20 in the wiper motor 12 as a longitudinal direction. It is formed into a shape. When viewed from the upper side of the apparatus, the motor yoke 16 and the holder accommodating portion 28 of the gear housing 26 are arranged inside the first arrangement hole 70A (see FIG. 4). Specifically, a part of the outer periphery of each of the motor yoke 16 and the holder accommodating portion 28 (the end portion on the upper side of the device) is arranged inside the first arrangement hole 70 </ b> A, and above the upper surface of the bracket 70. Slightly protruding (see FIG. 5).

  Further, a bracket-side fixing portion 72 is formed at a front end portion of the bracket 70 at a portion located on the upper side of the device with respect to the three bosses 36 of the gear housing 26. The bracket side fixing portion 72 is arranged with the vertical direction of the device as the plate thickness direction, and bulges toward the device upper side (the side opposite to the gear housing 26) with respect to the bracket 70. In other words, in the bracket 70, the general portion 71 having the first arrangement hole 70 </ b> A is disposed with a step on the lower side of the apparatus with respect to the bracket side fixing portion 72, and the motor yoke 16 and the general portion 71 are viewed in side view. Are arranged so as to wrap (see FIG. 5).

  As shown in FIGS. 4 and 6, a fixing hole (not shown) is formed through the bracket side fixing portion 72 at a position corresponding to the boss 36 of the gear housing 26 described above. Then, the fixing bolts B1, B2, B3 as “fixing members” are inserted into the fixing holes from the upper side of the apparatus and screwed into the female screws of the bosses 36, whereby the bracket 70 is fixed to the gear housing 26. . In other words, the wiper motor 12 is fixed to the bracket 70 at a portion around the output shaft 56 in the gear housing 26. When an overhead line passing through the axis of the output shaft 56 and parallel to the rotary shaft 20 is L1 (see FIG. 4) when viewed from the upper side of the apparatus, two fixing bolts B1 and B2 are connected to the overhead line L1. It is arranged on the front side (the side opposite to the rotary shaft 20), and the fixing bolt B3 is arranged on the rear side of the device (the rotary shaft 20 side) with respect to the overhead wire L1 (see FIG. 4). Further, when viewed from the front side of the apparatus, the fixing bolt B1 is disposed on one side in the width direction of the bracket 70 (the arrow E direction side in FIG. 4) with respect to the fixing bolt B3, and the fixing bolt B2 is disposed on the bracket 70 with respect to the fixing bolt B3. Is arranged on the other side in the width direction (arrow F direction side in FIG. 4).

  In addition, a substantially circular second arrangement hole 72 </ b> A is formed through the substantially central portion of the bracket side fixing portion 72. Inside the second arrangement hole 72A, a support base end portion 32A of the support portion 32 of the gear housing 26 is arranged. Thus, in a state where the bracket 70 is fixed to the gear housing 26, the sleeve 32 </ b> B and the stopper 38 of the gear housing 26 are exposed from the bracket side fixing portion 72, and are higher than the bracket side fixing portion 72 (bracket 70). Is arranged.

  As shown in FIGS. 4 and 5, a first attachment portion 74 is formed at the end of the front end portion of the bracket 70 on one side in the width direction (the arrow E direction side in FIGS. 4 and 5). The first mounting portion 74 is bent in a substantially crank shape on the lower side of the apparatus and on one side in the width direction of the bracket 70 when viewed from the front side of the apparatus. Specifically, the first attachment portion 74 extends from the bracket 70 to the lower side of the apparatus, and extends from the lower end portion of the first vertical wall portion 74A to one side in the width direction of the bracket 70. And a first mounting leg portion 74B that is extended. The first mounting portion 74 is disposed on one side in the width direction of the bracket 70 with respect to the motor yoke 16 (wiper motor 12), and the first vertical wall portion 74A connects the motor yoke 16 (wiper motor 12) to the bracket 70. It is comprised so that it may cover from the width direction one side.

  As shown in FIG. 4, the first mounting hole 74 </ b> C is formed through the first mounting leg 74 </ b> B. The first mounting hole 74C is formed in a substantially C shape opened to one side in the width direction of the bracket 70 when viewed from the upper side of the device, and is disposed on the front side of the device with respect to the axis AL of the rotary shaft 20. Yes.

  On the other hand, as shown also in FIG. 6, the outer side in the radial direction of the output shaft 56 with respect to the fixing bolt B2 (specifically, the end on the other side in the width direction of the bracket 70 (the arrow F direction in FIGS. 4 and 6) A second mounting portion 76 is formed at the end of the bracket-side fixing portion 72 disposed at the end. The second mounting portion 76 is bent in a substantially crank shape on the lower side of the apparatus and on the other side in the width direction of the bracket 70 when viewed from the front side of the apparatus. Specifically, the second mounting portion 76 includes a second vertical wall portion 76A extending from the bracket 70 to the lower side of the apparatus with the substantially radial direction of the output shaft 56 as a plate thickness direction, and a second vertical wall portion 76A. And a second mounting leg portion 76 </ b> B extending from the lower end portion to the radially outer side of the output shaft 56. Further, a second mounting hole 76C is formed through the second mounting leg portion 76B. The second mounting hole 76 </ b> C is formed in a substantially C shape opened to the other side in the width direction of the bracket 70 when viewed from the upper side of the apparatus, and is disposed on the front side of the apparatus with respect to the axis AL of the rotary shaft 20. (See FIG. 4).

  Further, although not shown in the drawings, substantially cylindrical front rubber grommets are respectively mounted in the first mounting hole 74C and the second mounting hole 76C. A mounting bolt (not shown) is inserted into the front rubber grommet via a collar and a washer, and the bracket 70 is fixed to the vehicle body in a floating state by the mounting bolt.

  Further, the second vertical wall portion 76A of the second attachment portion 76 is formed with a hole portion 76D at an intermediate portion in the width direction. The hole 76D extends in the vertical direction of the apparatus from the upper end to the lower end of the second vertical wall 76A. That is, the second vertical wall portion 76A is divided in the width direction by the hole portion 76D, and is constituted by a pair of vertical wall portions having relatively narrow widths. Thereby, the strength of the second vertical wall portion 76A is configured to be reduced by the hole portion 76D, and the pair of vertical wall portions constituting the second vertical wall portion 76A is the fragile portion 76A-1.

  Furthermore, the upper end portion of the hole 76D is disposed close to the radially outer side of the output shaft 56 with respect to the fixing bolt B2. Thereby, a pair of weak part 76A-1 which comprises 2nd vertical wall part 76A is arrange | positioned in the vicinity of the fixing | fixed site | part with the gear housing 26 in the bracket 70. FIG.

  The strength of the second vertical wall portion 76A is set as follows. That is, when a predetermined impact load on the vehicle lower side is input to the bracket 70 via the wiper arm 80 and the output shaft 56 of the wiper motor 12, the second vertical wall portion 76A (the pair of weak portions 76A-1) is broken or It is designed to deform. Thereby, for example, when a predetermined impact load to the vehicle lower side is input to the bracket 70 at the time of the collision of the vehicle V, the second vertical wall portion 76A is broken or deformed, and the bracket 70 is fixed to the second mounting portion 76. By displacing the vehicle V in the lower part, the deformation of the vehicle V is not hindered, and the impact absorbing effect at the time of collision due to the deformation of the vehicle V is ensured. As described above, the pair of fragile portions 76A-1 constituting the second vertical wall portion 76A are disposed in the vicinity of the fixed portion of the bracket 70 to the gear housing 26, and therefore input to the bracket 70. The applied impact load is efficiently transmitted to the pair of fragile portions 76A-1.

  Further, as shown in FIGS. 2 and 4, a third attachment portion 78 is integrally formed at the rear end portion of the bracket 70. The third attachment portion 78 is disposed on the rear side of the device (on the opposite side to the output shaft 56) with respect to the axis AL of the rotary shaft 20 in the wiper motor 12, and the first attachment portion 74 and the first attachment portion in the width direction of the bracket 70. It arrange | positions between 2 attachment parts 76. FIG. The third mounting portion 78 is bent to the lower side of the apparatus at a position on the rear side of the apparatus with respect to the wiper motor 12 with the front and rear of the apparatus as a plate thickness direction. The third mounting portion 78 is integrally formed with a support pin 78A, and the support pin 78A protrudes from the third mounting portion 78 to the rear side of the apparatus. A cylindrical rear grommet (not shown) is inserted through the support pin 78A, and the support pin 78A is inserted into a support bracket provided on the vehicle body side via the rear grommet. Thus, the rear end portion of the bracket 70 is supported (fixed) on the vehicle body. As described above, when the second vertical wall portion 76A is broken or deformed by the impact load input to the bracket 70 and the second mounting portion 76 is displaced to the lower side of the apparatus, the support pin 78A is moved to the rear grommet. It is set to drop off.

  As described above, in the bracket 70, between the first attachment portion 74 and the second attachment portion 76, between the second attachment portion 76 and the third attachment portion 78, and between the first attachment portion 74 and the third attachment portion 78. Are connected by the outer peripheral portion of the bracket 70. Then, when viewed from the upper side of the apparatus, an imaginary triangle connecting the first mounting portion 74 (first mounting hole 74C), the second mounting portion 76 (second mounting hole 76C), and the third mounting portion 78 (support pin 78A). The wiper motor 12 is arranged inside the. Furthermore, as described above, the two fixing bolts B1 and B2 are disposed on the front side of the apparatus with respect to the overhead line L1, and the fixing bolt B3 is disposed on the rear side of the apparatus with respect to the overhead line L1. Further, the first mounting portion 74 and the second mounting portion 76 are arranged on the front side of the apparatus with respect to the axis AL of the rotating shaft 20, and the third mounting section 78 is arranged on the rear side of the apparatus with respect to the axis AL of the rotating shaft 20. ing. For this reason, when viewed from the upper side of the apparatus, an imaginary triangle connecting the first mounting portion 74, the second mounting portion 76, and the third mounting portion 78, and an imaginary triangle connecting each fixing bolt B1, B2, B3 are It is comprised so that the substantially similar shape may be made. For this reason, the wiper motor 12 is configured to be fixed in a balanced manner with respect to the bracket 70 supported by the vehicle body at three points in the first mounting portion 74, the second mounting portion 76, and the third mounting portion 78.

  Further, a clamp mounting hole 70 </ b> B is formed through the rear end portion of the bracket 70. An attachment part of a clamp (not shown) is inserted into the clamp attachment hole 70B, and the clamp is attached to the bracket 70. Thereby, the harness (not shown) of the vehicle connected to the connector 66 of the wiper motor 12 can be held by the clamp.

(About wiper arm 80)
As shown in FIGS. 7 and 8, the wiper arm 80 has an arm head 82 that constitutes the base end portion thereof, and the arm head 82 is made of metal. An arm side fixing portion 84 is formed at the base end portion of the arm head 82. The arm side fixing portion 84 is formed in a substantially bottomed cylindrical shape opened to the lower side of the apparatus (the base end side of the output shaft 56), and surrounds the distal end portion of the output shaft 56 by the arm side fixing portion 84. It has become. Specifically, a concave portion 84 </ b> A that is open to the upper side of the apparatus is formed at the upper portion of the arm-side fixing portion 84, and the concave portion 84 </ b> A is disposed coaxially with the output shaft 56. A fixing hole 84Aa through which the tip of the output shaft 56 is inserted is formed through the bottom wall of the recess 84A. The fixing hole 84Aa is formed in a tapered shape corresponding to the tapered surface 56A of the output shaft 56. Has been. The distal end portion of the output shaft 56 is inserted into the fixing hole 84Aa, and a nut (not shown) is screwed into the screw portion 56B, whereby the arm head 82 is fixed to the output shaft 56. Thereby, the base end portion of the wiper arm 80 is directly fixed to the output shaft 56.

  Moreover, the arm side fixing | fixed part 84 has the skirt part 84B which comprises the outer peripheral part. The skirt portion 84B is formed in a substantially cylindrical shape extending from the arm head 82 to the lower side of the apparatus, and surrounds the periphery of the output shaft 56. Further, in a state where the base end portion of the wiper arm 80 is fixed to the output shaft 56, the skirt portion 84B is disposed on the device upper side (the front end side of the output shaft 56) than the stopper 38 described above.

  As shown in FIG. 3, the arm head 82 extends from the base end portion to the front WS glass 120 side. A retainer 86 constituting the wiper arm 80 is connected to the distal end portion of the arm head 82 so as to be rotatable with respect to the arm head 82 in a substantially orthogonal direction of the front WS glass 120. A wiper blade 90 is connected to the distal end side of the retainer 86. As a result, the wiper motor 12 is driven and the output shaft 56 reciprocates around the axis, whereby the wiper arm 80 (wiper blade) reciprocates around the axis of the output shaft 56 and the front WS glass 120 of the vehicle V is rotated. Is wiped off by the wiper blade.

  As shown in FIGS. 1, 2, and 8, a contact piece 88 as a “rotating portion” is integrally formed on the lower surface of the skirt portion 84 </ b> B. Thus, the contact piece 88 is configured to be integrally rotatable about the wiper arm 80 and the output shaft 56. The contact piece 88 protrudes from the lower surface of the skirt portion 84B to the lower side of the apparatus (the base end side of the output shaft 56), and is formed in a plate shape curved along the circumferential direction of the skirt portion 84B. That is, when viewed from the lower end side of the skirt portion 84B, the contact piece 88 extends along the circumferential direction of the skirt portion 84B.

  In the state where the arm head 82 is fixed to the output shaft 56, the contact piece 88 is disposed on the radially outer side of the sleeve 32B with respect to the portion of the sleeve 32B of the gear housing 26 where the stopper 38 is not formed. ing. Then, when viewed from the lower end side of the skirt portion 84B, the end surface on one side in the longitudinal direction of the contact piece 88 is a first contact surface 88A (see FIGS. 1 and 8). The first contact surface 88A is configured to be able to contact the first stopper surface 38A of the stopper 38 described above via a cover portion 112 of the water receiving member 100 described later. Specifically, as will be described later, when the wiper arm 80 reaches the upper reversal position, the first abutting surface 88A in the circumferential direction of the output shaft 56 (sleeve 32B) has a first stopper via a cover portion 112 described later. It is arranged to face the surface 38A with an interval.

  On the other hand, when viewed from the lower end side of the skirt portion 84B, the end surface on the other side in the longitudinal direction of the contact piece 88 is a second contact surface 88B (see FIGS. 2 and 8). The second contact surface 88B is configured to be able to contact the second stopper surface 38B of the stopper 38 described above via a cover portion 112 of the water receiving member 100 described later. Specifically, as will be described later, when the wiper arm 80 reaches the lower reversal position, the second contact surface 88B is spaced from the second stopper surface 38B via the cover portion 112 described later in the circumferential direction of the sleeve 32B. They are arranged opposite each other.

(About the water receiving member 100)
The water receiving member 100 prevents the wiper motor 12 from getting wet by a liquid such as water flowing into the vehicle V from the arrangement hole 124 </ b> A of the cowl louver 122, and prevents the liquid from entering the wiper motor 12. Is for. As shown in FIGS. 1 and 2, the water receiving member 100 is disposed so as to cover the bracket side fixing portion 72 of the bracket 70 and the gear housing 26 from the front end side of the output shaft 56. Specifically, it is arranged around the output shaft 56 on the front side of the apparatus with respect to the axis AL of the rotating shaft 20 when viewed from the front end side of the output shaft 56. That is, the heat sink 30 and the water receiving member 100 described above are arranged so as to be separated from the front side of the apparatus and the rear side of the apparatus with respect to the axis AL of the worm 52 so as not to wrap in the axial direction of the output shaft 56. Has been. In other words, the water receiving member 100 is configured not to extend toward the heat sink 30 with respect to the axis AL of the rotating shaft 20 when viewed from the front end side of the output shaft 56. Further, the water receiving member 100 is disposed so as not to wrap with the opening of the connector 66 when viewed from the distal end side of the output shaft 56. That is, when viewed from the upper side of the device, the tip end of the connector 66 protrudes toward the axial direction one side of the rotating shaft 20 with respect to the water receiving member 100 (see FIG. 1).

  As shown in FIG. 7, the water receiving member 100 is made of rubber and has a concave shape (groove shape) extending in the front-rear direction of the apparatus. Specifically, the water receiving member 100 includes a water receiving portion 102 that covers the upper surface of the bracket side fixing portion 72 of the bracket 70 around the output shaft 56, and an obliquely lower front side (vehicle lower side) from the water receiving portion 102. ) And a discharge portion 104 that discharges a liquid such as water that is blocked by the water receiving portion 102. Thereby, when viewed from the distal end side of the output shaft 56, the discharge portion 104 of the water receiving member 100 is disposed on the opposite side of the output shaft 56 from the heat sink 30.

  As shown in FIGS. 8 to 10, the bottom wall of the water receiving portion 102 is a receiving portion 102 </ b> A, and the receiving portion 102 </ b> A is arranged around the output shaft 56 with the apparatus vertical direction being the plate thickness direction. Has been. In other words, the receiving portion 102A is arranged on the vehicle lower side with respect to the arrangement hole 124A of the cowl louver 122, and is inclined toward the vehicle lower side toward the vehicle front side in a side view (see FIG. 7). Thereby, when a liquid such as water flows into the upper surface of the receiving portion 102A, the liquid flows to the front end side of the water receiving member 100 by gravity. Further, the outer shape of the receiving portion 102A is formed in a substantially U-shape that is open to the front side of the device when viewed from the front end side of the output shaft 56, and the width dimension of the receiving portion 102A becomes smaller toward the front side of the device. Is set to

  On the other hand, the bottom wall of the discharge portion 104 is a slope portion 104A. The slope portion 104A extends from the front end of the receiving portion 102A and is inclined toward the lower side of the device (side of the motor housing 24) toward the front side of the device in a side view. In other words, the slope portion 104A extends downward from the front end of the receiving portion 102A (see FIG. 7).

  And the peripheral wall part 106 of the water receiving member 100 is extended to the apparatus upper side from the outer peripheral part of the receiving part 102A and the slope part 104A in the part except the front end (lower end) of the slope part 104A. Further, the peripheral wall 106 is located on the radially outer side of the output shaft 56 (more specifically on the radially outer side of the arrangement hole 124A) with respect to the arrangement portion 124 of the cowl louver 122 when viewed from the tip end side of the output shaft 56. Has been placed. Thereby, the front end (lower end) of the slope portion 104A (discharge portion 104) is opened to the vehicle lower side, and water flowing into the upper surface of the receiving portion 102A flows from the receiving portion 102A to the slope portion 104A. Water is drained from the front end of 104A to the vehicle lower side. Note that the height of the peripheral wall portion 106 is set so that the open end of the skirt portion 84B is positioned inside the peripheral wall portion 106 in a state where the wiper arm 80 is fixed to the output shaft 56 (see FIG. 7).

  Further, a plurality of hook portions 108 (see FIG. 7 and FIG. 9) are integrally formed on the rear surface of the slope portion 104A. The hook portion 108 protrudes from the slope portion 104A to the rear side of the apparatus, and is engaged with the lower surface of the bracket side fixing portion 72 of the bracket 70 in the vertical direction of the apparatus. Thereby, the movement to the apparatus upper side with respect to the bracket 70 of the water receiving member 100 is restrict | limited.

  Further, a cap portion 110 constituting a part of the water receiving portion 102 is integrally formed at a substantially central portion of the receiving portion 102A. The cap portion 110 is formed to bulge from the receiving portion 102A toward the distal end side of the output shaft 56, and is formed in a substantially bottomed cylindrical shape opened to the lower side of the apparatus. In other words, the receiving portion 102 </ b> A extends from the lower end portion of the cap portion 110 to the outside in the radial direction of the output shaft 56. A support portion 32 of the gear housing 26 is disposed inside the cap portion 110. Thereby, the support part 32 is covered with the cap part 110 from the outside. The tip of the cap portion 110 is a mounting end portion 110A, and an insertion hole 110Aa through which the output shaft 56 is inserted is formed through the mounting end portion 110A. When the output shaft 56 is inserted into the insertion hole 110 </ b> Aa, the lip formed on the inner peripheral surface of the insertion hole 110 </ b> Aa is in sliding contact with the outer peripheral surface of the output shaft 56, and the cap portion 110 is attached to the output shaft 56. Has been. Thereby, liquid such as water is prevented or suppressed from entering the apparatus lower side (gear housing 26 side) from between the insertion hole 110 </ b> Aa and the output shaft 56.

  Further, the outer diameter dimension of the cap portion 110 (mounting end portion 110A) is set smaller than the inner diameter size of the skirt portion 84B of the arm head 82, and the mounting end portion 110A is disposed inside the skirt portion 84B. . Further, the water receiving portion 102 is integrally formed with a cover portion 112 that covers the stopper 38 of the gear housing 26 described above. The cover portion 112 bulges outward from the side wall of the cap portion 110 in the radial direction corresponding to the shape of the stopper 38, and covers the stopper 38 so as to be in close contact with the outer peripheral portion of the stopper 38. Thus, when the water receiving member 100 is mounted on the distal end side of the output shaft 56, the stopper 38 functions as a detent for the water receiving member 100 in the circumferential direction of the output shaft 56. In other words, the stopper 38 is configured to function as a positioning member for the water receiving member 100 in the circumferential direction of the output shaft 56.

  Further, a portion of the cover portion 112 that covers the first stopper surface 38A of the stopper 38 is a first covering portion 112A (see FIG. 10), and a portion of the cover portion 112 that covers the second stopper surface 38B of the stopper 38 is the first covering portion 112A. 2 covering portion 112B (see FIG. 10).

  When the wiper arm 80 is rotated to the upper reversal position, the first contact surface 88A of the wiper arm 80 is set to face the first covering portion 112A with a slight gap in the circumferential direction of the output shaft 56. Has been. Further, when the wiper arm 80 is further rotated to one side in the rotation direction than the upper reversal position due to an external force or the like, the first contact surface 88A of the wiper arm 80 comes into contact with the first covering portion 112A. ing. The rotation position of the wiper arm 80 is referred to as an upper limit position (in a broad sense, a position grasped as a “first predetermined position”). Thereby, in the upper limit position, the rotation of the wiper arm 80 to one side in the rotation direction is limited by the stopper 38 and the water receiving member 100 (the cover portion 112 thereof).

  On the other hand, when the wiper arm 80 is rotated to the lower inversion position, the second contact surface 88B of the wiper arm 80 is set to face the second covering portion 112B with a slight gap in the circumferential direction of the output shaft 56. Has been. Further, when the wiper arm 80 is further rotated to the other side in the rotation direction from the lower inversion position due to an external force or the like, as shown in FIGS. 1 and 2, the second contact surface 88B of the wiper arm 80 is It comes in contact with the second covering portion 112B. The rotational position of the wiper arm 80 is referred to as a lower limit position (in a broad sense, a position grasped as a “second predetermined position”). Thereby, in the lower limit position, the rotation of the wiper arm 80 to the other side in the rotation direction is limited by the stopper 38 and the water receiving member 100 (the cover portion 112 thereof). Note that the upper limit position and the lower limit position are set so that the wiper blade 90 does not fall off the front WS glass 120 even when the wiper arm 80 is rotated to the upper limit position or the lower limit position.

  Further, a bolt accommodating portion 114 as an “accommodating portion” is formed on the outer peripheral portion of the water receiving portion 102 at a position corresponding to the fixing bolts B1 to B3 described above. The bolt housing portion 114 bulges toward the distal end side of the output shaft 56 and opens to the proximal end side of the output shaft 56 and the radially outer side of the output shaft 56. Specifically, the bolt housing portion 114 is formed in a substantially semicircular shape opened to the radially outer side of the output shaft 56 when viewed from the distal end side of the output shaft 56. A part of the head of the fixing bolts B <b> 1 to B <b> 3 is arranged (accommodated) inside the bolt accommodating portion 114. Thus, when the water receiving member 100 is mounted from the front end side of the output shaft 56, in addition to the stopper 38 described above, the bolt receiving portion 114 (fixing bolt) is used as a detent for the water receiving member 100 in the circumferential direction of the output shaft 56. The heads of B1, B2, and B3) also function. Further, even when the heads of the fixing bolts B <b> 1 to B <b> 3 protrude on the output shaft 56 side of the bracket 70, the lower surface of the receiving portion 102 </ b> A and the upper surface of the bracket 70 are in surface contact with the water receiving member 100 attached. The water receiving member 100 can be mounted in a stable posture.

  Further, as shown in FIG. 7, a protrusion 116 protruding toward the bracket 70 is integrally formed on the lower surface of the receiving portion 102 </ b> A, and the protrusion 116 is formed in the second arrangement hole 72 </ b> A of the bracket 70. It is in contact with the inner peripheral surface. Thereby, the movement of the water receiving member 100 toward the rear side of the apparatus with respect to the bracket 70 is restricted by the protrusion 116.

  Next, the operation and effect of the present embodiment will be described.

  In the vehicle wiper device 10 configured as described above, the base end portion of the arm head 82 in the wiper arm 80 is fixed to the distal end portion of the output shaft 56 of the wiper motor 12. Here, the water receiving member 100 is attached to the wiper motor 12 from the front end side of the output shaft 56, and the water receiving member 100 is disposed on the vehicle lower side of the arrangement hole 124 </ b> A of the cowl louver 122. Specifically, the cap part 110 of the water receiving member 100 is attached to the distal end side of the output shaft 56 and covers the sleeve 32B. Further, the water receiving portion 102 of the water receiving member 100 extends from the cap portion 110 to the radially outer side of the output shaft 56 between the wiper arm 80 and the gear housing 26. Further, the discharge portion 104 of the water receiving member 100 extends from the water receiving portion 102 to the vehicle lower side on the side of the gear housing 26.

  For this reason, when a liquid such as water enters the inside of the vehicle V from the arrangement hole 124 </ b> A of the cowl louver 122, the liquid is blocked by the water receiving portion 102 of the water receiving member 100. Then, the liquid blocked by the water receiving portion 102 is drained from the front end of the water receiving member 100 (discharge portion 104) to the vehicle lower side through the discharge portion 104. Thereby, it can prevent that the gear housing 26 (namely, wiper motor 12) gets wet with the said liquid.

  Further, in the vehicle wiper device 10, when the rotation shaft 20 of the motor body 14 rotates forward and backward under the control of the control unit 60, the output shaft 56 of the speed reduction mechanism 50 rotates forward and backward (reciprocating rotation) around its own axis. . As a result, the wiper arm 80 (wiper blade 90) fixed to the output shaft 56 reciprocates between the upper reverse position and the lower reverse position, and the front WS glass 120 of the vehicle V is wiped by the wiper blade 90. The

  Here, a stopper 38 is provided integrally with the sleeve 32 </ b> B of the gear housing 26. The stopper 38 protrudes outward in the radial direction of the sleeve 32 </ b> B and is covered with the cover portion 112 of the water receiving member 100. Then, if an external force due to a gust of wind or the like during vehicle travel acts on the wiper arm 80 and the wiper arm 80 further rotates from the upper reversal position to one side in the rotation direction, the wiper arm 80 rotates at the upper limit position of the wiper arm 80. Rotation in one direction is limited. Specifically, in the upper limit position, the cover portion in which the first contact surface 88A of the contact piece 88 provided at the base end portion of the wiper arm 80 (arm head 82) covers the first stopper surface 38A of the stopper 38. 112 abuts on the first covering portion 112A. Thereby, in the upper limit position, the rotation of the wiper arm 80 to one side in the rotation direction is limited by the stopper 38 and the cover portion 112 (water receiving member 100).

  On the other hand, if an external force due to snow falling from the roof of the vehicle acts on the wiper arm 80 during braking of the vehicle and the wiper arm 80 further rotates from the lower inversion position to the other side in the rotation direction, at the lower limit position of the wiper arm 80, The rotation of the wiper arm 80 to the other side in the rotation direction is restricted. Specifically, in the lower limit position, the second cover portion of the cover portion 112 where the second contact surface 88B of the contact piece 88 of the wiper arm 80 (arm head 82) covers the second stopper surface 38B of the stopper 38 is provided. Abuts on 112B. Thereby, in the lower limit position, the rotation of the wiper arm 80 to the other side in the rotation direction is limited by the stopper 38 and the cover portion 112 (water receiving member 100).

  Moreover, when the rotation of the wiper arm 80 to one side in the rotational direction (the other side in the rotational direction) is restricted by the stopper 38 and the cover portion 112 (water receiving member 100) at the upper limit position (lower limit position). A rubber cover 112 (water receiving member 100) is interposed between the contact piece 88 and the stopper 38. For this reason, the cover part 112 (water receiving member 100) functions as a buffer member. Accordingly, the water receiving member 100 reduces noise generated when the stopper 38 restricts the rotation of the wiper arm 80 to one side in the rotation direction (the other side in the rotation direction) at the upper limit position (lower limit position). (Suppressed).

  As described above, according to the vehicle wiper device 10 of the present embodiment, the cover portion 112 is formed on the water receiving member 100 for preventing the wiper motor 12 from being wet, and the stopper 38 is covered with the cover portion 112. Yes. Therefore, the water receiving member 100 can achieve both waterproofness against the wiper motor 12 and reduction of abnormal noise.

  In addition, as described above, when the rotation of the wiper arm 80 to one side in the rotational direction (the other side in the rotational direction) is restricted at the upper limit position (lower limit position), the cover portion 112 (water receiving member 100). ) Functions as a buffer member for the wiper arm 80. For this reason, when the wiper arm 80 is rotated to the upper limit position (lower limit position), the load input to the contact piece 88 and the stopper 38 can be absorbed by the cover portion 112. Thereby, when the wiper arm 80 is rotated beyond the upper limit position (lower limit position), even if the contact piece 88 and the stopper 38 are in strong contact, the shape of the stopper surface can be prevented from being deformed. Can be improved. That is, if the stopper 38 is not covered with the cover portion 112 (water receiving member 100), the metal contact piece 88 and the stopper 38 directly contact each other. For this reason, the load due to the direct contact between the contact piece 88 and the stopper 38 is directly input. Thereby, there exists a possibility that durability of the contact piece 88 and the stopper 38 may fall. On the other hand, in the present embodiment, as described above, since the cover portion 112 (water receiving member 100) is interposed between the contact piece 88 and the stopper 38, the contact piece 88 and the stopper 38 are provided. Can be absorbed by the cover portion 112. For this reason, durability of the contact piece 88 and the stopper 38 can be improved with respect to the case where the wiper arm 80 is repeatedly rotated to the upper limit position (lower limit position).

  Further, as described above, the cover portion 112 of the water receiving member 100 includes the first covering portion 112A that covers the first stopper surface 38A of the stopper 38, and the second covering portion 112B that covers the second stopper surface 38B of the stopper 38. ,have. Then, the movement of the water receiving member 100 around the axis (circumferential direction) of the output shaft 56 with respect to the gear housing 26 is limited by the first covering portion 112A and the second covering portion 112B. Thereby, the stopper 38 can be functioned as a positioning member with respect to the gear housing 26 of the water receiving member 100. As a result, it is possible to improve the mounting property (assembling property) when mounting (assembling) the water receiving member 100 on the distal end side of the output shaft 56.

  Further, a bracket side fixing portion 72 of the bracket 70 is disposed between the water receiving portion 102 of the water receiving member 100 and the gear housing 26, and the bracket 70 is fixed to the gear housing 26 at the bracket side fixing portion 72. ing. Accordingly, the water receiving member 100 can prevent the bracket-side fixing portion 72 that is the fixing portion of the bracket 70 to the gear housing 26 from being wetted.

In addition, a bolt housing portion 114 bulging toward the distal end side of the output shaft 56 is formed on the outer peripheral portion of the water receiving portion 102 at positions corresponding to the above-described fixing bolts B1 to B3. A part of the head is disposed (accommodated) in the fixing bolts B <b> 1 to B <b> 3 inside the bolt accommodating portion 114. Thus, when the water receiving member 100 is mounted on the distal end side of the output shaft 56, the bolt housing portion 114 (the heads of the fixing bolts B1 to B3) is used as a detent for the water receiving member 100 in the circumferential direction of the output shaft 56. Can function. As a result, the mounting state of the water receiving member 100 can be maintained satisfactorily. Further, even when the heads of the fixing bolts B <b> 1 to B <b> 3 protrude on the output shaft 56 side of the bracket 70, the lower surface of the receiving portion 102 </ b> A and the upper surface of the bracket 70 are in surface contact with the water receiving member 100 attached. The water receiving member 100 can be mounted in a stable posture.
Further, since the positions corresponding to the fixing bolts B1 to B3 are accommodated and covered by the bolt accommodating portions 114 of the water receiving portion 102, the water is prevented from being exposed, and water (especially in the screw holes of the fixing bolts B1 to B3) Corrosion such as rust can be prevented by intrusion of salt-containing water).

  A hook portion 108 is integrally formed on the rear surface of the slope portion 104A of the water receiving member 100, and the hook portion 108 is engaged with the lower surface of the bracket side fixing portion 72 of the bracket 70 in the vertical direction of the apparatus. Yes. Thereby, in the state which attached the water receiving member 100 to the front end side of the output shaft 56, the movement to the front end side of the output shaft 56 with respect to the bracket 70 of the water receiving member 100 can be restrict | limited. As a result, for example, rattling of the discharge unit 104 in the apparatus vertical direction when the water receiving member 100 is mounted can be suppressed.

  Further, a protrusion 116 protruding toward the bracket 70 is integrally formed on the lower surface of the receiving portion 102 </ b> A in the water receiving member 100, and the protrusion 116 is an inner peripheral surface of the second arrangement hole 72 </ b> A of the bracket 70. It is in contact with. Thereby, the movement of the water receiving member 100 to the rear side of the apparatus (the radially outer side of the output shaft 56) with respect to the bracket 70 can be restricted by the protrusion 116.

  Further, as described above, the stopper 38 is formed integrally with the sleeve 32B and protrudes outward in the radial direction of the sleeve 32B. In other words, the stopper 38 is disposed adjacent to the radially outer side of the sleeve 32B. For this reason, even when the stopper 38 is provided in the gear housing 26, the enlargement of the gear housing 26 can be suppressed.

  Further, the sleeve 32 </ b> B of the gear housing 26 is covered with the cap part 110 of the water receiving member 100. A cylindrical skirt portion 84B is formed at the base end portion of the wiper arm 80 (arm head 82), and the skirt portion 84B surrounds the output shaft 56 and the cap portion 110 of the water receiving member 100. . A contact piece 88 is formed on the skirt portion 84 </ b> B, and a cover portion 112 that covers the stopper 38 is formed on the cap portion 110. Thereby, the output shaft 56 (specifically, the portion supported by the sleeve 32B) is wetted by a liquid such as water flowing from the base end portion of the wiper arm 80 (arm head 82) to the water receiving member 100 side. The rotation of the wiper arm 80 can be restricted at the upper limit position and the lower limit position while being prevented by the skirt portion 84B. Further, since the skirt portion 84B surrounds the output shaft 56 and the cap portion 110 of the water receiving member 100, liquid such as water against the gravity from the mounting end portion 110A of the cap portion 110 to the surface of the gear housing 26. Preventing intrusion. This prevents the liquid from inadvertently reaching an electrical connection site such as the connector 66 provided on the cover plate 40.

  Further, the heat sink 30 and the water receiving member 100 of the gear housing 26 are arranged apart from the front side of the apparatus and the rear side of the apparatus with respect to the axis AL of the worm 52 so as not to wrap in the axial direction of the output shaft 56. It is configured. Further, when viewed from the front end side of the output shaft 56, the discharge portion 104 of the water receiving member 100 is arranged on the opposite side of the output shaft 56 from the heat sink 30. For this reason, the heat generated by the power system element 64 </ b> A of the control unit 60 can be efficiently radiated from the heat sink 30. That is, the heat generated by the power system element 64A is transmitted to the heat sink 30 and dissipated. At this time, since the discharge portion 104 of the water receiving member 100 is disposed on the opposite side of the heat sink 30 with respect to the output shaft 56, the heat dissipation effect of the heat sink 30 by the discharge portion 104 can be prevented. Thereby, the heat generated by the power element 64 </ b> A can be efficiently radiated from the heat sink 30. Further, thermal deformation of the water receiving member 100 due to the water receiving member 100 coming into contact with the heat sink 30 can also be prevented.

  In this embodiment, the stopper 38 is formed integrally with the gear housing 26. However, the stopper 38 and the gear housing 26 are configured separately and the stopper 38 is assembled to the gear housing 26. May be. That is, the “stopper provided in the housing” in the present invention includes the case where the stopper 38 is formed separately from the gear housing 26. Thereby, for example, in the specification of each vehicle, when the rotation angle of the wiper arm 80 (the rotation angle or the rotation position from the lower inversion position to the upper inversion position) is different, the stopper 38 is provided corresponding to various vehicles. By changing, the wiper motor 12 can be easily adapted to the specifications of each vehicle. In other words, the wiper motor 12 can be easily adapted to the specifications of each vehicle without changing the gear housing 26.

  In the present embodiment, the rotation of the wiper arm 80 is restricted at the upper limit position and the lower limit position. Instead, the rotation of the wiper arm 80 may be limited at any one of the upper limit position and the lower limit position. That is, for example, the length of the contact piece 88 in the longitudinal direction along the circumferential direction of the skirt portion 84B is changed so that the contact piece 88 is stopped by the cover portion 112 at the upper limit position or the lower limit position. 38 may be configured to contact 38.

  Further, in the present embodiment, the stopper 38 is formed integrally with the sleeve 32B of the gear housing 26 and is disposed adjacent to the radially outer side of the sleeve 32B. Instead of this, the stopper 38 may be arranged so as to be spaced radially outward with respect to the sleeve 32B.

  In the present embodiment, the first stopper surface 38A and the second stopper surface 38B are formed in one stopper 38 extending in the circumferential direction of the sleeve 32B. Instead, for example, the stopper 38 is configured as two stoppers divided in the circumferential direction of the sleeve 32B, the first stopper surface 38A is formed on one stopper, and the second stopper surface 38B is formed on the other stopper. May be.

  In this embodiment, the contact piece 88 is formed integrally with the skirt portion 84B of the wiper arm 80, and the contact piece 88 is configured to be rotatable integrally with the wiper arm 80. The configuration is not limited to this. For example, the contact piece 88 may be configured separately from the wiper arm 80, and the contact piece 88 may be fixed to the wiper arm 80 so that the contact piece 88 can rotate integrally with the wiper arm 80. Further, for example, the contact piece 88 may be configured separately from the wiper arm 80 and the contact piece 88 may be fixed to the output shaft 56 so that the contact piece 88 can rotate integrally with the wiper arm 80. Good.

  In the present embodiment, the water receiving member 100 is made of rubber, but the material of the water receiving member 100 is not limited to this. For example, the water receiving member 100 may be made of a resin material or may be made of an elastomer.

  In the present embodiment, the bracket 70 is manufactured by die-casting an aluminum alloy or the like, but the bracket 70 may be manufactured by pressing the steel plate. In this case, the bracket 70 and the support pin 78A may be configured separately and the support pin 78A may be fixed to the bracket 70.

  Further, in the present embodiment, the third mounting portion 78 of the bracket 70 is bent to the lower side of the apparatus with the front-rear direction of the apparatus being the plate thickness direction, and the support pin 78A is integrally formed with the third mounting section 78. . Instead of this, the third mounting portion 78 may be configured to be fastened and fixed to the vehicle body by omitting the support pins 78A in the third mounting portion 78, corresponding to various vehicles. For example, the lower end portion of the third attachment portion 78 may be extended to the lower side of the apparatus as compared with the present embodiment, and a fastening portion that is fastened to the vehicle body may be formed at the lower end portion of the third attachment portion 78.

  In the present embodiment, the lower reversal position and the stop position of the wiper arm 80 are set at the same position, but the stop position may be set on the other side in the rotational direction with respect to the lower reverse position. That is, the wiper arm 80 may be rotated from the stop position to the lower inversion position when the operation of the vehicle wiper device 10 is started, and then the wiper arm 80 may be reciprocated between the lower inversion position and the upper inversion position. . In this case, the lower limit position is set on the other side in the rotational direction from the stop position.

  Further, in the present embodiment, the vehicle wiper device 10 is configured as a so-called tandem type wiper device, but the vehicle wiper device 10 may be configured as a so-called counter-type wiper device corresponding to various vehicles. Good. That is, when the vehicle wiper device 10 is operated, the pair of wiper arms 80 may be configured to rotate in directions opposite to each other.

DESCRIPTION OF SYMBOLS 10 ... Wiper apparatus for vehicles, 12 ... Wiper motor, 26 ... Gear housing (housing), 30 ... Heat sink, 32B ... Sleeve, 38 ... Stopper, 56 ... Output shaft, 60 ... Control part, 64A ... Power system element, 64B ... Control System element 70 ... Bracket 80 ... Wiper arm 88 ... Contact piece (rotating part) 100 ... Water receiving member 102 ... Water receiving part 104 ... Discharge part 108 ... Hook part 110 ... Cap part 112 DESCRIPTION OF SYMBOLS ... Cover part, 114 ... Bolt accommodation part (accommodation part), 116 ... Projection part, B1, B2, B3 ... Fixing bolt (fixing member), S ... Water receiving structure of wiper apparatus for vehicles

Claims (7)

A wiper motor comprising: an output shaft that outputs a driving force; and a housing formed with a sleeve that rotatably supports the output shaft in a state in which a tip portion of the output shaft protrudes to the outside;
A wiper arm whose base end is fixed to the distal end of the output shaft and reciprocally rotates around the output shaft by rotating the output shaft;
A rotating portion configured to be integrally rotatable with a base end portion of the wiper arm;
A stopper that is provided in the housing and protrudes from the housing toward the distal end side of the output shaft, and restricts rotation of the wiper arm to one side of the rotation direction or the other side of the rotation direction;
A cap portion mounted on the distal end side of the output shaft and covering the sleeve; and a proximal end portion side of the wiper arm extending from the cap portion radially outward of the output shaft between the wiper arm and the housing A water receiving portion that blocks liquid flowing into the housing from the side of the housing, and liquid that extends from the water receiving portion to the vehicle lower side and is blocked by the water receiving portion on the side of the housing. A water receiving member configured to include a discharge portion that discharges to the vehicle lower side in the direction,
A cover that is formed on the water receiving portion and covers the stopper and restricts the rotation of the wiper arm to one side of the rotation direction or the other side of the rotation direction together with the stopper by contacting the rotation unit. And
A water receiving structure for a vehicle wiper device comprising:   2. The vehicle wiper according to claim 1, wherein movement of the water receiving member with respect to the housing is restricted by the stopper in a circumferential direction of the output shaft in a state where the water receiving member is mounted on a distal end side of the output shaft. The water receiving structure of the device.   The bracket for fixing the said wiper motor to a vehicle body is provided between the said water receiving part and the said housing, The said bracket is being fixed to the said housing around the said output shaft. A water receiving structure for a vehicle wiper device according to claim 2. The bracket is fixed to the housing by a plurality of fixing members arranged at predetermined intervals in the circumferential direction of the output shaft,
The water receiving structure for a vehicle wiper device according to claim 3, wherein the water receiving portion is formed with a receiving portion that bulges toward the distal end side of the output shaft and receives the head of the fixing member.   5. The vehicle wiper device according to claim 3, wherein the water receiving member is formed with a hook portion that is engaged with the bracket and restricts movement of the output shaft toward the distal end side of the bracket. Water receiving structure. The bracket is formed with an arrangement hole for arranging the sleeve inside,
The water receiving portion is formed with a protruding portion that protrudes toward the bracket and abuts on the inner peripheral surface of the arrangement hole and restricts the movement of the output shaft in the radially outer side of the water receiving member. The water receiving structure for a vehicle wiper device according to any one of claims 3 to 5. The wiper motor is configured to include a power system element and a control system element, and a control unit that controls the rotation of the output shaft is accommodated in the housing.
The housing has a heat sink that is formed on one side of the sleeve in correspondence with the power system element and dissipates heat of the power system element,
The water receiving structure for a vehicle wiper device according to any one of claims 1 to 6, wherein in the water receiving member, the discharge portion is disposed on a side opposite to the heat sink with respect to the output shaft. .

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