JP2010188841A - Wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain miniaturization of a wiper device including a rocking space of a link mechanism, and to secure a larger crushable zone. <P>SOLUTION: A wiper motor 13 in which an output shaft 55 is arranged close to a DR side pivot shaft 15 between the DR side pivot shaft 15 and an AS side pivot shaft 16 is provided, and a motor crank 65 is provided such that rocking motion is performed between the DR side pivot shaft 15 and the AS side pivot shaft 16. The motor crank 65 is not rocked at a position out of a space between the DR side pivot shaft 15 and the AS side pivot shaft 16, miniaturization of the wiper device 12 including the rocking space of the motor crank 65 can be attained, and the larger crushable zone can be secured. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wiper device that swings and drives a pair of wiper arms to wipe a wiping surface.

  Conventionally, a wiper device for wiping the wiping surface of the front windshield is mounted on the front side of a vehicle body such as an automobile. The wiper device includes a wiper motor that is rotationally driven by a drive current from an in-vehicle controller, and a link mechanism that synchronizes the wiper arm on the driver's seat side and the wiper arm on the passenger seat side. Then, by operating a wiper switch provided in the passenger compartment or the like, the wiper motor is rotationally driven, whereby each wiper arm is operated synchronously by the link mechanism to wipe the wiping surface of the front windshield.

  Incidentally, it is necessary to secure a large crushable zone (shock absorbing space) on the front side of the vehicle body in order to protect passengers and the like from impacts such as a frontal collision. Therefore, downsizing of the wiper device mounted so as to lie on the front end side of the front windshield is an important issue in securing a large crushable zone. Therefore, for example, by using a wiper motor (reversible rotation motor) that can rotate in the forward and reverse directions, the swinging space of the link mechanism is reduced, thereby realizing a reduction in the size of the wiper device including the swinging space of the link mechanism. Has been done.

  As a wiper device using such a reversible rotary motor, for example, a technique described in Patent Document 1 is known. The wiper device described in Patent Document 1 includes a first drive shaft (driver seat side) and a second drive shaft (passenger seat side), and a wiper motor (reversible rotation motor) is disposed on the second drive shaft side. is doing. The motor shaft (output shaft) of the wiper motor is provided at a position deviated from between the first drive shaft and the second drive shaft, and the motor crank forming the link mechanism also includes the first drive shaft and the second drive shaft. It swings at a position deviated from the space between the drive shafts.

Japanese Patent No. 4015622 (FIGS. 1 and 2)

  However, according to the wiper device described in Patent Document 1 described above, the motor shaft is provided at a position deviated from between the first drive shaft and the second drive shaft, and the motor crank is the first drive shaft. And the second drive shaft oscillate at a position deviated from between the second drive shaft and the large portion occupying the wiper device including the oscillating space of the motor crank is the second drive shaft side, that is, a substantially central portion of the vehicle body. Will be placed. Therefore, there is a problem that it is difficult to secure a larger crushable zone.

  An object of the present invention is to provide a wiper device capable of realizing a downsized wiper device including a swinging space of a link mechanism and securing a larger crushable zone.

  The wiper device of the present invention is a wiper device that swings and drives the first wiper arm and the second wiper arm to wipe the wiping surface, the first pivot shaft to which the proximal end side of the first wiper arm is attached, and the second A second pivot shaft to which a proximal end side of the wiper arm is attached; a first link member attached to the first pivot shaft; a second link member attached to the second pivot shaft; the first pivot shaft; A reversible rotation motor having an output shaft disposed between the pivot shaft and the first pivot shaft, and a reciprocating rotation motor attached to the output shaft and swinging between the first pivot shaft and the second pivot shaft. A first drive that is provided between the third link member and the third link member and the first link member and transmits the swinging motion of the third link member to the first link member. A rod and a second drive rod provided between the first link member and the second link member and transmitting the swinging motion of the first link member to the second link member. To do.

  The wiper device according to the present invention is characterized in that the first pivot shaft is disposed close to a side portion of the vehicle body.

  The wiper device of the present invention rotatably supports the first pivot shaft, and has a first pivot holder having a first mounting portion, and a second pivot shaft that rotatably supports the second pivot shaft, and has a second mounting portion. Two pivot holders, a frame provided between the first pivot holder and the second pivot holder, a bracket fixed to the frame to support the reversible rotation motor, and having a third attachment portion, The second mounting portion and the third mounting portion are inserted and fixed in mounting holes of a vehicle body, and the first mounting portion is fixed to the vehicle body with screws.

  The wiper device according to the present invention is characterized in that at least one of the second attachment portion and the third attachment portion is inserted and fixed into the attachment hole via an elastic member.

  According to the present invention, the reversible rotation motor having the output shaft disposed near the first pivot shaft between the first pivot shaft and the second pivot shaft is provided, and the third link member is connected to the first pivot shaft and the second pivot shaft. Since the third link member is provided so as to oscillate with respect to the shaft, the third link member does not oscillate at a position deviated from between the first pivot shaft and the second pivot shaft. Therefore, the wiper device including the swinging space of the third link member can be reduced in size, and a larger crushable zone can be secured. In addition, since the output shaft of the reversible rotation motor is disposed closer to the first pivot shaft, the third link member and the first drive rod can be shortened, and the weight of the wiper device can be reduced and the manufacturing cost can be reduced. .

  According to the present invention, since the first pivot shaft is disposed close to the side portion of the vehicle body, the reversible rotation motor can be disposed in a dead space formed close to the side portion of the vehicle body. Therefore, the dead space of the vehicle body can be used effectively, and a larger crushable zone can be secured in the substantially central portion of the vehicle body.

  According to the present invention, the first pivot shaft rotatably supports the first pivot holder having the first mounting portion, and the second pivot shaft rotatably supports the second pivot holder having the second mounting portion. And a frame provided between the first pivot holder and the second pivot holder, a bracket fixed to the frame to support the reversible rotation motor, and having a third attachment portion, and the second attachment portion and the third attachment portion. The attachment portion is inserted and fixed in the attachment hole of the vehicle body, and the first attachment portion is fixed to the vehicle body with screws. Therefore, the work of attaching the wiper device to the vehicle body can be simplified. Further, the side on which the reversible rotation motor serving as the vibration generation source of the wiper device is arranged can be firmly fixed by fixing the screw of the first mounting portion, and thus the rattling and abnormal noise generation of the wiper device can be suppressed. .

  According to the present invention, since at least one of the second attachment portion and the third attachment portion is inserted and fixed to the attachment hole via the elastic member, the vibration of the wiper device is prevented from being transmitted to the vehicle body. can do.

It is explanatory drawing explaining the mounting state to the vehicle body of the wiper apparatus which concerns on this invention. It is the front view which looked at the wiper device of Drawing 1 from the front side. It is the front view which looked at the wiper device of Drawing 1 from the back side. It is a fragmentary sectional view explaining the internal structure of a wiper motor. It is explanatory drawing explaining the internal structure of a cover member. It is the perspective view which looked at the DR side pivot shaft side from the back side. It is the perspective view which looked at the AS side pivot shaft side from the back side. (A), (b) is explanatory drawing explaining the attachment procedure (1) to the vehicle body of a wiper apparatus. (A), (b) is explanatory drawing explaining the attachment procedure (2) to the vehicle body of a wiper apparatus. (A), (b) is explanatory drawing explaining the attachment procedure (3) to the vehicle body of a wiper apparatus.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory view for explaining a mounting state of a wiper device according to the present invention on a vehicle body, FIG. 2 is a front view of the wiper device of FIG. 1 viewed from the front side, and FIG. 3 is a view of the wiper device of FIG. 4 is a partial sectional view for explaining the internal structure of the wiper motor, FIG. 5 is an explanatory view for explaining the internal structure of the cover member, and FIG. 6 is a perspective view of the DR side pivot shaft side as seen from the back side. FIG. 7 is a perspective view of the AS side pivot shaft side as viewed from the back side.

  As shown in FIG. 1, on the front side of the vehicle body 10, a wiper device 12 is mounted for wiping rainwater, dust and the like attached to the wiping surface of the front windshield 11 to ensure the driver's view. . The wiper device 12 is provided on the driver's seat side of the vehicle body 10, and includes a wiper motor (forward / reverse rotation motor) 13, a link mechanism 14, a DR side pivot shaft (first pivot shaft) 15, and an AS side pivot shaft (second pivot shaft). 16 is provided.

  A base end side of a DR side wiper arm (first wiper arm) 17 is attached to the DR side pivot shaft 15, and a base end side of an AS side wiper arm (second wiper arm) 18 is attached to the AS side pivot shaft 16. A DR-side wiper blade 17 a and an AS-side wiper blade 18 a that are in contact with the wiping surface of the front windshield 11 are attached to the distal end sides of the wiper arms 17 and 18. Here, the DR side represents the driver seat side, and the AS side represents the passenger seat side.

  The wiper device 12 is provided inside a cowl (not shown) located in front of the front windshield 11, and most of the portion that occupies the wiper device 12 extends from the front end of the front windshield 11 to the vehicle compartment of the vehicle body 10. It is provided inside (upper side in the figure). The opening portion of the cowl is closed by a cowl top panel (not shown) formed in a plate shape, thereby covering the wiper device 12 and improving the appearance of the vehicle body 10.

  The front end side of the front windshield 11 has an arc shape that curves toward the rear side of the vehicle body 10 toward the driver seat side and the passenger seat side, and on the front end side of the front windshield 11 and the driver seat side of the vehicle body 10 and A dead space DS of a predetermined size is formed on the passenger seat side. Each dead space DS is formed close to the side portions 10a and 10b of the vehicle body 10, respectively.

  Here, the dead space DS is an empty space in which a peripheral device (not shown) provided in the engine room is not disposed without reducing the design freedom of the design of the vehicle body 10. In the embodiment, the wiper motor 13 that forms the wiper device 12 is arranged in the dead space DS on the driver's seat side. As a result, the wiper motor 13 which is a large portion of the wiper device 12 is not disposed in the substantially central portion of the vehicle body 10, and a relatively large crushable zone CZ can be formed. However, when the steering position is opposite to that of a Japanese car as in the case of European and American cars, the wiper device 12 can be arranged in the left and right direction from the state shown in FIG.

  As shown in FIGS. 2 and 3, the wiper device 12 rotatably supports a DR side pivot holder (first pivot holder) 19 that rotatably supports the DR side pivot shaft 15 and an AS side pivot shaft 16. AS side pivot holder (second pivot holder) 20 is provided. Each pivot holder 19, 20 is formed into a predetermined shape by casting a molten aluminum material or the like, and inside each pivot holder 19, 20 is a bearing that allows smooth rotation of each pivot shaft 15, 16. Each member (not shown) is provided.

  A pipe-shaped frame 21 made of steel is provided between the DR side pivot holder 19 and the AS side pivot holder 20, and the frame 21 holds the pivot holders 19 and 20 at a predetermined interval. Thereby, the distance between the DR side pivot shaft 15 and the AS side pivot shaft 16 is set to L. Here, the distance L between the pivot shafts 15 and 16 is such that the frame 21 having a different length is used in accordance with a difference in the vehicle width dimension of the vehicle body 10 on which the wiper device 12 is mounted (light vehicle, ordinary passenger car, etc.). Is set arbitrarily.

  The DR side pivot holder 19 is integrally provided with an attachment leg (first attachment portion) 19a for attaching the wiper device 12 to the vehicle body 10. The mounting leg 19a is provided so as to protrude from the side opposite to the frame 21 side with the DR side pivot shaft 15 interposed therebetween, and a cushion member 22 formed in an annular shape by an elastic material such as rubber on the tip side (right side in the figure). Is installed.

  A fixing bolt (screw) 23 is inserted into the cushion member 22, and the fixing bolt 23 is screwed to the first fixing portion 24 of the vehicle body 10. Thereby, the DR side pivot holder 19 is firmly fixed (screw fixed) to the first fixing portion 24 via the cushion member 22. Here, the cushion member 22 functions as a cushioning material and blocks vibration generated when the wiper device 12 is operated from being transmitted to the vehicle interior. However, the cushion member 22 may be attached to the first fixing portion 24 side without being attached to the mounting leg 19a side.

  The AS side pivot holder 20 is integrally provided with an attachment projection (second attachment portion) 20a for attaching the wiper device 12 to the vehicle body 10. The attachment protrusion 20a is provided so as to protrude on the side opposite to the frame 21 side with the AS side pivot shaft 16 interposed therebetween, is formed in a solid columnar shape, and its tip side (left side in the figure) is hemispherical. When the wiper device 12 is attached to the vehicle body 10, the attachment protrusion 20 a is inserted and fixed into an attachment hole 25 a formed in the second fixing portion 25 of the vehicle body 10.

  A cushion member (elastic member) 26 formed in an annular shape by an elastic material such as rubber is mounted in the attachment hole 25a. The cushion member 26 elastically supports the attachment protrusion 20a while being elastically deformed by the attachment protrusion 20a when the attachment protrusion 20a is inserted and fixed in the attachment hole 25a. The cushion member 26 also functions as a cushioning material and blocks vibrations generated when the wiper device 12 is operated from being transmitted to the vehicle interior. However, the cushion member 26 can be attached to the attachment protrusion 20a side without being attached to the attachment hole 25a side.

  A motor bracket (bracket) 27 that supports the wiper motor 13 is fixed near the DR side pivot holder 19 of the frame 21. Specifically, the motor bracket 27 sets the center position C of the output shaft 55 of the wiper motor 13 within a distance L / 3 from the DR side pivot shaft 15 between the pivot shafts 15 and 16 (closer to the DR side pivot shaft 15). It is fixed to the frame 21 so as to be arranged.

  Accordingly, the wiper motor 13 is disposed between the pivot shafts 15 and 16 to suppress the protrusion amount of the wiper motor 13 from the DR side pivot shaft 15 to the side portion 10a side of the vehicle body 10. Since the amount of protrusion of the wiper motor 13 toward the side portion 10a is suppressed, the DR side pivot shaft 15 is arranged close to the side portion 10a of the vehicle body 10 and the dead space DS can be used effectively. Yes. Further, the wiper motor 13 and the frame 21 are arranged so as to be parallel to each other, and an increase in the dimension of the wiper device 12 in the short direction (vertical direction in the figure) is suppressed.

  The motor bracket 27 is formed into a predetermined shape by pressing a steel plate, and is disposed between the motor bracket 27 and the wiper motor 13 so that the frame 21 crosses. Here, after the motor bracket 27 and the wiper motor 13 are brought into contact with each other with the frame 21 interposed therebetween, a plurality of fixing screws 28 are inserted into the motor bracket 27, and each fixing screw 28 is inserted into a plurality of fixing legs 52 a (see FIG. 6)) and are fixed to the frame 21 by screw connection.

  The motor bracket 27 is integrally provided with an attachment arm (third attachment portion) 27 a for attaching the wiper device 12 to the vehicle body 10. The attachment arm 27a extends in a direction orthogonal to the frame 21 and toward the rear side of the vehicle body 10, and the tip end side thereof is tapered. When the wiper device 12 is attached to the vehicle body 10, the attachment arm 27 a is inserted and fixed in an attachment hole 29 a formed in the third fixing portion 29 of the vehicle body 10.

  A cushion member (elastic member) 30 formed in a substantially trapezoidal shape by an elastic material such as rubber is attached to the mounting arm 27a. The cushion member 30 is inserted into the attachment hole 29a while being elastically deformed by the attachment hole 29a when the attachment arm 27a is inserted and fixed in the attachment hole 29a. The cushion member 30 also functions as a cushioning material and blocks vibration generated when the wiper device 12 is operated from being transmitted to the vehicle interior. However, the cushion member 30 may be attached to the attachment hole 29a side without being attached to the attachment arm 27a side.

  The wiper motor 13 is a so-called reverse-type wiper motor, and the wiper arms 17 and 18 in the wiping ranges 11a and 11b (see FIG. 1) on the windshield 11 are switched by switching the rotation direction of the wiper motor 13 at a predetermined timing. Are driven to swing. As shown in FIG. 4, the wiper motor 13 includes a motor main body 40 as a drive source that is rotationally driven in forward and reverse directions, and a gear portion 50 that houses a speed reduction mechanism 51 therein.

  The motor body 40 includes a yoke 41 formed into a bottomed cylindrical shape by pressing (deep drawing) a magnetic material such as a steel plate. Inside the yoke 41, there are four poles (two pairs). Magnets 42 (only one pair is shown in the figure) are arranged to face each other. Inside each magnet 42, an armature 43 having a coil (not shown) wound around the outer periphery is rotatably provided through a predetermined gap. An amateur shaft 44 passes through and is fixed to the rotation center of the amateur 43 so that the amateur shaft 44 rotates together with the amateur 43.

  A commutator 45 is fixed to a portion of the amateur shaft 44 close to the amateur 43. A coil wound around the outer periphery of the armature 43 is electrically connected to the commutator 45, and a pair of brushes 46 are in sliding contact with the outer periphery of the commutator 45. Each brush 46 is movably provided in a brush holder 47 and is pressed toward the commutator 45 with a predetermined pressure by a pair of spring members 48 provided on the back side of each brush 46.

  A driving current is supplied to each brush 46 from a control device (on-vehicle controller) 31 installed inside the dashboard of the vehicle body 10 (not shown). As a result, a driving current is supplied to the coil wound around the armature 43 via each brush 46 and the commutator 45, and a rotational force (electromagnetic force) is generated in the armature 43, so that the armature shaft 44 has a predetermined rotational direction and rotational speed. It is designed to rotate at. Here, the control device 31 is electrically connected to a wiper switch 32 provided in the passenger compartment or the like and a power source (battery) 33 installed in the engine room or the like (not shown).

  One end of the amateur shaft 44 in the axial direction (left side in the figure) protrudes from the inside of the yoke 41 and extends to the inside of the gear portion 50. A worm 44a forming the speed reduction mechanism 51 is integrally provided at one axial end of the amateur shaft 44. The worm 44a is integrally formed on the outer periphery of the amateur shaft 44 by rolling or the like.

  An annular sensor magnet 49 is fixed to the outer periphery of the amateur shaft 44 by press-fitting. The sensor magnet 49 constitutes a rotation detection sensor that detects the rotation position (rotation direction, rotation speed, etc.) of the armature shaft 44, and has 12 poles (six pairs) of magnetic poles (N poles and S poles) along the circumferential direction. Poles) are alternately magnetized.

  As shown in FIGS. 4 to 6, the gear unit 50 includes a gear case 52 and a gear cover 53. The gear case 52 is formed in a bottomed shape by casting a molten aluminum material, and a plurality of fixed legs 52 a are integrally provided outside the gear case 52. Each fixing leg 52a is screwed to each fixing screw 28 for fixing the wiper motor 13 to the motor bracket 27.

  Inside the gear case 52, a worm 44a and a worm wheel 54 are rotatably accommodated. The worm wheel 54 is formed of a resin material such as plastic, and forms the speed reduction mechanism 51 together with the worm 44a. Gear teeth 54 a that mesh with the worm 44 a are integrally provided on the outer periphery of the worm wheel 54, and the worm wheel 54 rotates with the rotation of the amateur shaft 44.

  At the rotation center of the worm wheel 54, the base end side of the output shaft 55 made of steel is fixed by serration fitting or the like, and the output shaft 55 rotates integrally with the worm wheel 54. The distal end side of the output shaft 55 extends outside the gear case 52 and penetrates the motor bracket 27. The rotation of the armature shaft 44 is decelerated by the worm 44a and the worm wheel 54 (deceleration mechanism 51) and transmitted with a high torque to the output shaft 55.

  An annular sensor magnet 56 is fixed to one side surface 54 b of the worm wheel 54. The sensor magnet 56 constitutes a position detection sensor that detects the angular position of the worm wheel 54, and a pair of magnetic poles are magnetized along the circumferential direction.

  The gear cover 53 is formed in a bottomed shape from a resin material such as plastic, and has an outer shape substantially similar to the opening portion of the gear case 52. The gear cover 53 closes the opening of the gear case 52, and a seal member (not shown) is provided between the gear cover 53 and the gear case 52. This prevents rainwater, dust, and the like from entering the inside of the gear case 52.

  The gear cover 53 is integrally provided with a connector connecting portion 53a to which an external connector 57 provided on the vehicle body 10 is connected. A plurality of terminals (not shown) are insert-molded in the connector connecting portion 53a, and the plurality of terminals include a drive current terminal and a rotation detection sensor / position detection sensor terminal. One end of each terminal is electrically connected to a terminal (not shown) on the external connector 57 side, and the other end of each terminal is electrically connected to a control board 58.

  A control board 58 is provided inside the gear cover 53, and the control board 58 is fixed to the gear cover 53 by a plurality of fixing screws 59. The control board 58 faces the one side surface 54b of the worm wheel 54 in a state where the gear case 52 and the gear cover 53 are assembled.

  A Hall IC 60 is provided on a portion of the control board 58 facing the sensor magnet 56, and the Hall IC 60 constitutes a position detection sensor together with the sensor magnet 56. The Hall IC 60 is turned on / off by the change of the magnetic pole accompanying the rotation of the sensor magnet 56, and sends a rectangular wave signal generated during the on / off drive to a calculation unit (not shown) of the control board 58. ing. And the calculating part of the control board 58 monitors the appearance timing and frequency | count of appearance of the rectangular wave signal from Hall IC60, and calculates the angular position of the worm wheel 54 based on this. In the present embodiment, an MR sensor (magnetoresistive element) can be used instead of the Hall IC 60.

  A portion of the control board 58 facing the sensor magnet 49 is provided with a pair of Hall ICs 61, and each Hall IC 61 constitutes a rotation detection sensor together with the sensor magnet 49. Each Hall IC 61 is turned on / off by the change of the magnetic pole accompanying the rotation of the sensor magnet 49, and sends a rectangular wave signal generated in the on / off drive to the calculation unit of the control board 58. And the calculating part of the control board 58 monitors the appearance timing and the frequency | count of appearance of the rectangular wave signal from each Hall IC61, and calculates the rotation direction, rotation speed, etc. of the amateur shaft 44 based on this. Yes.

  One end side of the pair of brush side terminals 62 is electrically connected to the control board 58, and the other end side of each brush side terminal 62 is electrically connected to each brush 46 and connected to each brush 46. A drive current is supplied.

  As shown in FIGS. 6 and 7, the link mechanism 14 includes a DR side drive lever 63 (first link member), an AS side drive lever 64 (second link member), a motor crank 65 (third link member), and a drive. It is composed of a rod 66 (first drive rod) and a connecting rod 67 (second drive rod).

  The DR side drive lever 63 is formed in a substantially L shape by pressing a steel plate, and one end side of the DR side drive lever 63 is attached to the DR side pivot shaft 15 so as to be integrally rotatable. A ball joint 63a is provided on the other end side of the DR side drive lever 63, and one end side of a connecting rod 67 is rotatably connected to the ball joint 63a.

  The AS side drive lever 64 is formed in a substantially I shape by pressing a steel plate, and one end side of the AS side drive lever 64 is attached to the AS side pivot shaft 16 so as to be integrally rotatable. A ball joint 64a is provided on the other end side of the AS side drive lever 64, and the other end side of the connecting rod 67 is rotatably connected to the ball joint 64a.

  The DR side drive lever 63 and the AS side drive lever 64 are front windshields about the pivot shafts 15 and 16 when the wiper motor 13 is rotationally driven in the forward and reverse directions as indicated by broken arrows DP and AP in the figure. 11 is swung at an angle corresponding to each wiping range 11a, 11b (see FIG. 1).

  The motor crank 65 is formed in a substantially I shape by pressing a steel plate in the same manner as the AS-side drive lever 64, and one end side of the motor crank 65 is attached to the output shaft 55 so as to be integrally rotatable. Yes. A ball joint 65a is provided on the other end side of the motor crank 65, and one end side of the drive rod 66 is rotatably connected to the ball joint 65a.

  The motor crank 65 swings at a predetermined angle about the output shaft 55 when the wiper motor 13 is rotationally driven in the forward and reverse directions as indicated by a broken line arrow OS in the figure. Further, the length dimension along the longitudinal direction of the motor crank 65 is set to be sufficiently shorter than the distance between the output shaft 55 and the DR side pivot shaft 15, and the swing space of the motor crank 65 is set to each pivot shaft 15. , 16 are provided.

  The drive rod 66 is formed into a rod shape by pressing a steel plate that is thinner than the drive levers 63 and 64 and the motor crank 65, and has a substantially U-shaped cross section. Thereby, the predetermined strength is ensured and the weight is reduced. The other end of the drive rod 66 is rotatably connected to a ball joint 63b provided near the ball joint 63a of the DR side drive lever 63. Thus, the drive rod 66 is provided between the motor crank 65 and the DR side drive lever 63 so as to transmit the swinging motion of the motor crank 65 to the DR side drive lever 63.

  As with the drive rod 66, the connecting rod 67 is formed into a rod shape by pressing a thin steel plate, and its cross-sectional shape is substantially U-shaped. As a result, similar to the drive rod 66, a predetermined strength is ensured and the weight is reduced. The connecting rod 67 is provided between the DR side drive lever 63 and the AS side drive lever 64 and transmits the swinging motion of the DR side drive lever 63 to the AS side drive lever 64.

  Next, a method of attaching the wiper device 12 configured as described above to the vehicle body 10 (attachment procedure) will be described in detail with reference to the drawings.

  8A and 8B are explanatory views for explaining the procedure (1) for attaching the wiper device to the vehicle body, and FIGS. 9A and 9B show the procedure (2) for attaching the wiper device to the vehicle body. FIGS. 10A and 10B are explanatory diagrams for explaining the procedure (3) for attaching the wiper device to the vehicle body.

  The wiper device 12 is embedded in the front end side of the front windshield 11 in order to secure a larger crushable zone CZ on the front side of the vehicle body 10 (see FIG. 1). Therefore, it is necessary to devise a method for attaching the wiper device 12 to the vehicle body 10, and the wiper device 12 is attached to the vehicle body 10 according to the following attachment procedures (1) to (3).

[Installation procedure (1)]
First, the assembled wiper device 12 (see FIGS. 2 and 3) is prepared. Next, as shown in FIG. 8A, the attachment protrusion 20 a of the AS side pivot holder 20 is made to face the cushion member 26 attached to the second fixing portion 25 of the vehicle body 10. Then, as shown by a broken line arrow (1) in the figure, the attachment protrusion 20a is inserted into the attachment hole 25a via the cushion member 26.

  Thereafter, by inserting a predetermined amount of the mounting protrusion 20a into the mounting hole 25a, the insertion and fixing of the wiper device 12 to the vehicle body 10 on the AS side pivot holder 20 side is completed as shown in FIG. 8B. Here, since the tip end side of the attachment protrusion 20a is formed in a hemispherical shape, the insertion work into the cushion member 26 (attachment hole 25a) can be easily performed. As described above, the AS-side pivot holder 20 arranged at the substantially central portion of the vehicle body 10 is inserted and fixed to the vehicle body 10, so that, for example, it is not necessary for the operator to cover the vehicle body 10 and fix the screws. Can be simplified.

[Installation procedure (2)]
Next, under the state where the mounting protrusion 20a is inserted and fixed in the mounting hole 25a, the mounting arm 27a of the motor bracket 27 is attached to the mounting hole in the third fixing portion 29 of the vehicle body 10 as shown in FIG. Let us face 29a. Then, as shown by a broken line arrow (2) in the figure, the attachment arm 27a is inserted into the attachment hole 29a via the cushion member 30.

  Thereafter, by inserting the attachment arm 27a into the attachment hole 29a by a predetermined amount, the insertion and fixing of the wiper device 12 at the location of the motor bracket 27 to the vehicle body 10 is completed as shown in FIG. 9B. Since the attachment projection 20a is elastically supported by the cushion member 26, the wiper device 12 is allowed to tilt when the attachment arm 27a is inserted into the attachment hole 29a.

[Installation procedure (3)]
Next, with the mounting protrusion 20a inserted into the mounting hole 25a and the mounting arm 27a inserted into the mounting hole 29a, the DR side pivot holder as shown by the broken arrow (3) in FIG. The 19 mounting legs 19 a are placed on the first fixing portion 24 of the vehicle body 10. Thereafter, as indicated by a broken line arrow (4) in the figure, the fixing bolt 23 is inserted into the cushion member 22, and the fixing bolt 23 is screwed to the first fixing portion 24 with a predetermined tightening torque. As a result, as shown in FIG. 10B, screw fixing to the vehicle body 10 on the DR side pivot holder 19 side of the wiper device 12 is completed.

  In this way, the wiper device 12 is supported at three points on the vehicle body 10, and only the DR side pivot holder 19 side where the wiper motor 13 is close is screwed. Therefore, the vibration generating source side (wiper motor 13 side) of the wiper device 12 is firmly fixed to the vehicle body 10, and rattling and abnormal noise generation with respect to the vehicle body 10 of the wiper device 12 are effectively suppressed.

  As described above in detail, according to the wiper device 12 according to the present embodiment, the wiper motor in which the output shaft 55 is disposed near the DR side pivot shaft 15 between the DR side pivot shaft 15 and the AS side pivot shaft 16. 13 and the motor crank 65 is provided so as to swing between the DR side pivot shaft 15 and the AS side pivot shaft 16, so that the motor crank 65 is connected to the DR side pivot shaft 15 and the AS side pivot shaft 16. Does not swing at a position that is out of the way. Therefore, the wiper device 12 including the swinging space of the motor crank 65 can be reduced in size, and a larger crushable zone CZ can be secured. Further, since the output shaft 55 of the wiper motor 13 is disposed closer to the DR side pivot shaft 15, the motor crank 65 and the drive rod 66 can be shortened, and the wiper device 12 can be reduced in weight and the manufacturing cost can be reduced. .

  Further, according to the wiper device 12 according to the present embodiment, since the DR side pivot shaft 15 is disposed close to the side portion 10a of the vehicle body 10, a dead space formed close to the side portion 10a of the vehicle body 10 is provided. A wiper motor 13 can be disposed in the DS. Therefore, the dead space DS of the vehicle body 10 can be used effectively, and a larger crushable zone CZ can be secured in the substantially central portion of the vehicle body 10.

  Furthermore, according to the wiper device 12 according to the present embodiment, the mounting protrusion 20a of the AS side pivot holder 20 and the mounting arm 27a of the motor bracket 27 are respectively inserted and fixed in the mounting holes 25a and 29a of the vehicle body 10, and the DR side Since the mounting leg 19a of the pivot holder 19 is fixed to the vehicle body 10 by screws, the mounting operation of the wiper device 12 to the vehicle body 10 can be simplified. Further, the side on which the wiper motor 13 serving as the vibration generation source of the wiper device 12 is disposed can be firmly fixed by fixing the screw of the mounting leg 19a, and thus, the rattling and abnormal noise generation of the wiper device 12 can be suppressed. .

  Further, according to the wiper device 12 according to the present embodiment, both the attachment protrusion 20a and the attachment arm 27a are inserted and fixed to the attachment holes 25a and 29a via the cushion members 26 and 30, respectively. Transmission of vibration to the vehicle body 10 can be suppressed.

  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, both the mounting protrusion 20a and the mounting arm 27a are inserted and fixed to the mounting holes 25a and 29a via the cushion members 26 and 30, respectively, but the present invention is not limited to this. It is also possible to omit the cushion member 26 on the side away from the wiper motor 13 (vibration generation source).

  In the above embodiment, the wiper device 12 mounted on the front side of the vehicle body 10 is shown. However, the present invention is not limited to this, and the present invention is not limited to this. It can also be installed.

  Furthermore, in the above-described embodiment, the motor body 40 has four poles (two pairs) of magnets 42 arranged opposite to each other. It is also possible to use a motor body in which (three pairs) or more magnets are arranged to face each other.

  Moreover, in the said embodiment, although what used the motor with a brush which has the commutator 45 and the brush 46 as the motor main body 40 was shown, this invention is not limited to this, Motors of other types, such as a brushless motor, are shown. Can also be used.

DESCRIPTION OF SYMBOLS 10 Car body 10a, 10b Side part 11 Front windshield 11a, 11b Wiping range 12 Wiper apparatus 13 Wiper motor (reversible rotation motor)
14 Link mechanism 15 DR side pivot shaft (first pivot shaft)
16 AS pivot shaft (second pivot shaft)
17 DR wiper arm (first wiper arm)
17a DR side wiper blade 18 AS side wiper arm (second wiper arm)
18a AS side wiper blade 19 DR side pivot holder (first pivot holder)
19a Mounting leg (first mounting part)
20 AS side pivot holder (second pivot holder)
20a Mounting protrusion (second mounting part)
21 Frame 22 Cushion member 23 Fixing bolt (screw)
24 First fixing part (vehicle body)
25 Second fixing part (vehicle body)
25a Mounting hole 26 Cushion member (elastic member)
27 Motor bracket (bracket)
27a Mounting arm (third mounting part)
28 Fixing screw 29 Third fixing part (vehicle body)
29a Mounting hole 30 Cushion member (elastic member)
31 Control Device 32 Wiper Switch 33 Power Supply 40 Motor Body (Wiper Motor)
41 Yoke 42 Magnet 43 Amateur 44 Amateur shaft 44a Worm (deceleration mechanism)
45 Commutator 46 Brush 47 Brush holder 48 Spring member 49 Sensor magnet 50 Gear part (wiper motor)
51 Reduction Mechanism 52 Gear Case 52a Fixed Leg 53 Gear Cover 53a Connector Connection 54 Warm Wheel (Reduction Mechanism)
54a Gear teeth 54b One side surface 55 Output shaft 56 Sensor magnet 57 External connector 58 Control board 59 Fixing screw 60, 61 Hall IC
62 Brush side terminal 63 DR side drive lever (first link member, link mechanism)
63a, 63b Ball joint 64 AS side drive lever (second link member, link mechanism)
64a Ball joint 65 Motor crank (third link member, link mechanism)
65a Ball joint 66 Drive rod (first drive rod, link mechanism)
67 Connecting rod (second drive rod, link mechanism)
DS Dead Space CZ Crashable Zone

Claims (4)

A wiper device that swings and drives the first wiper arm and the second wiper arm to wipe the wiping surface,
A first pivot shaft to which a proximal end side of the first wiper arm is attached;
A second pivot shaft to which a proximal end side of the second wiper arm is attached;
A first link member attached to the first pivot shaft;
A second link member attached to the second pivot shaft;
A reversible rotation motor in which an output shaft is disposed near the first pivot shaft between the first pivot shaft and the second pivot shaft;
A third link member attached to the output shaft and oscillating between the first pivot shaft and the second pivot shaft;
A first drive rod that is provided between the third link member and the first link member and transmits a swinging motion of the third link member to the first link member;
A wiper device comprising a second drive rod provided between the first link member and the second link member and transmitting a swinging motion of the first link member to the second link member. .   2. The wiper device according to claim 1, wherein the first pivot shaft is disposed close to a side portion of a vehicle body.   3. The wiper device according to claim 1, wherein the first pivot shaft is rotatably supported, the first pivot holder having a first attachment portion, the second pivot shaft is rotatably supported, and the second attachment is performed. A second pivot holder having a portion, a frame provided between the first pivot holder and the second pivot holder, a bracket fixed to the frame to support the reversible rotation motor, and a third attachment portion A wiper device, wherein the second attachment portion and the third attachment portion are inserted and fixed in an attachment hole of a vehicle body, and the first attachment portion is fixed to the vehicle body by screws.   The wiper device according to claim 3, wherein at least one of the second attachment portion and the third attachment portion is inserted and fixed into the attachment hole via an elastic member.

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