JP4878542B2 - Vehicle wiper device - Google Patents

Description

  The present invention relates to a vehicle wiper device that is provided in a vehicle such as an automobile and wipes the window glass of the vehicle.

  The wiper device for a vehicle wipes off deposits such as rain, fog, snow, and splashes from the front vehicle on the windshield of the vehicle, and includes a wiper blade that comes into contact with the windshield and a wiper arm to which the wiper blade is attached. I have. The wiper device is provided with a drive unit for swinging and driving the wiper arm. The drive unit is pivotally supported by a pivot holder fixed to the vehicle body and a pivot shaft (wiper shaft) and a four-bar linkage mechanism. A wiper motor connected to the pivot shaft, and the wiper arm is attached to the tip of the pivot shaft. When the wiper motor is activated, the rotation of the output shaft is converted into a swinging motion by the four-bar linkage mechanism and transmitted to the pivot shaft, so that the wiper arm swings.

  A wiper device provided in an automobile is usually provided with two wiper arms on the driver's seat side and the passenger seat side. As a wiping pattern for such a wiper device, two wiper blades swing in the same direction. And a counter wiping mold in which the wiper arm swing centers are arranged on both the left and right sides of the vehicle body, and each wiper blade swings between the upper inverted position of the left and right sides of the wind glass and the lower inverted position of the central portion. The counter wiping type is also called an overlap type because two wiper blades overlap each other in the lower inverted position.

  In a wiper device in which two wiper arms are driven by a single drive unit, a pair of pivot shafts to which each wiper arm is fixed are connected by a four-bar linkage mechanism and interlocked with each other. This is connected to the wiper motor via a four-bar linkage mechanism. Thereby, the power of one wiper motor is transmitted to both pivot shafts via each link mechanism, and each wiper arm is driven to swing. However, in recent years, a four-bar linkage mechanism has been incorporated in the dash upper to link each wiper arm by increasing the wiping area associated with the increase in the size of the window glass and increasing the curvature to improve the lateral visibility. May be difficult.

Thus, for example, in the wiper device disclosed in Patent Document 1, a pair of drive units each having a wiper motor is mounted on the vehicle body, and the wiper arms on the driver side and the passenger side are driven by separate drive units. Even in this case, the output shaft and the pivot shaft of the wiper motor are connected by the four-bar linkage mechanism, and when the wiper motor operates and the output shaft rotates, the rotation is transmitted to the pivot shaft via the four-bar linkage mechanism and the wiper arm Oscillates.
German Patent Application No. 3512941

  However, in the conventional wiper device, the output shaft of the wiper motor and the pivot shaft are connected by a four-bar linkage mechanism including a crank arm and a drive lever so that the driving force of the wiper motor is transmitted from the output shaft to the pivot shaft. Therefore, it is necessary to ensure the swing range of the crank arm and the drive lever that constitute the four-bar linkage mechanism. For this reason, there is a problem that the mounting space of the vehicle body to which the wiper device is attached becomes large.

  Further, in the conventional wiper device, the operation of the pivot shaft with respect to the output shaft is deviated due to deformation of each arm or lever interposed between the output shaft and the pivot shaft, connection backlash, etc. There is a possibility that an error may occur in the interlocking. Therefore, in particular, in a wiper device in which the wiper arm is driven to swing by swinging the output shaft of the wiper motor within a predetermined angular range (forward and reverse rotation), an error in interlocking between the output shaft and the pivot shaft is taken into consideration. Therefore, it is necessary to control the operation of the wiper motor, and there is a problem that the control content of the wiper motor becomes complicated.

  An object of the present invention is to reduce a mounting space of a vehicle body to which a vehicle wiper device is mounted.

  Another object of the present invention is to increase the rigidity of the power transmission structure between the output shaft and the pivot shaft to facilitate the operation control of the wiper motor.

A vehicle wiper device according to the present invention is a vehicle wiper device that includes a wiper arm to which a wiper blade is attached and a drive unit that drives the wiper arm to swing. The drive unit includes a pivot shaft to which the wiper arm is attached; A pivot holder fixed to the vehicle body and rotatably supporting the pivot shaft; and a wiper motor having an output shaft that swings within a predetermined angle range about the shaft center and coupled to the pivot holder by a coupling member; , coupled to said pivot shaft and said output shaft, have a rocking vibration transmitting portion which transmits the rocking motion of said output shaft to said pivot axis, the swing motion transmitting portion with respect to the pivot axis The swinging motion transmitting section is tilted by a predetermined angle with respect to the output shaft, and the swinging motion of the output shaft is When the pivot shaft is used as the pivot shaft via the swing motion transmitting portion, a predetermined inclination angle is maintained between the output shaft and the swing motion transmitting portion, and the pivot shaft and the swing motion transmission are maintained. It is configured so that power transmission can be performed while maintaining a predetermined inclination angle with the unit.

A vehicle wiper device according to the present invention is a vehicle wiper device that includes a wiper arm to which a wiper blade is attached and a drive unit that drives the wiper arm to swing. The drive unit includes a pivot shaft to which the wiper arm is attached; A pivot holder fixed to the vehicle body and rotatably supporting the pivot shaft; a motor bracket connected to the pivot holder by a connecting member and fixed to the vehicle body; and a predetermined angular range about the axis. A wiper motor having a swinging output shaft, fixed to the motor bracket, connected to the pivot shaft and the output shaft, and a swinging motion transmitting portion for transmitting the swinging motion of the output shaft to the pivot shaft; have a, the swing motion transmitting portion is inclined at a predetermined angle with respect to the pivot axis, wherein the oscillating motion transmission Is inclined with respect to the output shaft by a predetermined angle, and when the swing motion of the output shaft is changed to the pivot shaft via the swing motion transmitting portion, the output shaft and the swing motion are transmitted. A predetermined inclination angle between the pivot shaft and the swinging motion transmission section, and a power transmission can be performed while the predetermined inclination angle is maintained between the pivot shaft and the swinging motion transmission section. It is characterized by.

The vehicle wiper device according to the present invention is characterized in that the output shaft and the swing motion transmitting portion are connected by a universal joint, and the swing motion transmitting portion is inclined at a predetermined angle with respect to the output shaft. To do.

The vehicle wiper device according to the present invention is characterized in that the pivot shaft and the swing motion transmitting portion are connected by a universal joint, and the swing motion transmitting portion is inclined at a predetermined angle with respect to the pivot shaft. To do.

  The vehicle wiper device according to the present invention is characterized in that the oscillating motion transmitting portion is formed of a flexible shaft.

  The wiper device for a vehicle according to the present invention includes a drive unit on the driver's seat that swings and drives a wiper arm on the driver's seat to which the wiper blade on the driver's seat is attached, and a wiper arm on the passenger's seat that has the wiper blade on the passenger's seat And a driving unit on the passenger seat side that swings and drives the vehicle.

According to the present invention, the output shaft of the pivot shaft and a wiper motor wiper arm is attached to connecting the oscillating motion transmission unit, maintaining a predetermined tilt angle between the output shaft and the swinging motion transmitting portion, Since the swinging motion of the output shaft is transmitted to the pivot shaft while maintaining a predetermined inclination angle between the pivot shaft and the swinging motion transmission part, the space required for the power transmission structure is reduced. Thus, the mounting space of the vehicle body to which the vehicle wiper device is mounted can be reduced. Further, the output shaft is kept in a state where a predetermined inclination angle is maintained between the output shaft and the oscillating motion transmitting portion and a predetermined inclination angle is maintained between the pivot shaft and the oscillating motion transmitting portion. Since the oscillating motion is transmitted to the pivot shaft, the rigidity of the power transmission structure can be increased, and the error in interlocking between the output shaft and the pivot shaft can be reduced. As a result, it is possible to facilitate the operation control of the wiper motor without considering the error of the linkage between the output shaft and the pivot shaft. Further, in the present invention, the swinging motion transmitting portion and the output shaft can be connected by a universal joint, and the swinging motion transmitting portion and the pivot shaft can be connected by a universal joint.

According to the present invention, the oscillating motion transmitting portion that connects the output shaft and the pivot shaft is formed by the flexible shaft, so that the structure for connecting the oscillating motion transmitting portion and the output shaft, the oscillating motion transmitting portion , The connection structure with the pivot shaft can be simplified, and thereby the cost of the vehicle wiper device can be reduced.

  According to the present invention, since the wiper arm on the driver's seat side and the wiper arm on the passenger seat side are driven to swing by the separate drive units, the layout of each drive unit on the vehicle body can be improved.

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

  FIG. 1 is an explanatory view showing a part of a vehicle provided with a vehicle wiper device according to an embodiment of the present invention. The vehicle 11 wipes rainwater adhering to a windshield glass (front glass) 12. In order to secure the driver's field of view, a vehicle wiper device 13 (hereinafter referred to as a wiper device 13) is provided. The wiper device 13 includes a DR-side wiper arm 15a to which a driver-side or DR-side wiper blade 14a is attached, and an AS-side wiper arm 15b to which a passenger-side or AS-side wiper blade 14b is attached. Each wiper arm 15a, 15b is equipped with an unillustrated ammunition, and each wiper blade 14a, 14b is urged by the ammunition to come into elastic contact with the windshield glass 12.

  The wiper device 13 is provided with a DR side drive unit 21a for swinging and driving the DR side wiper arm 15a, and the AS side drive unit 21b is provided for the wiper device 13 to swing and drive the AS side wiper arm 15b. Is provided. That is, in the wiper device 13, the wiper arms 15a and 15b are driven to swing by the separate drive units 21a and 21b.

  The DR-side drive unit 21a includes a DR-side pivot holder 22a fixed to the vehicle body 11a of the vehicle 11, and a DR-side pivot shaft 23a is rotatably supported by the pivot holder 22a. A DR-side wiper arm 15a is attached to the distal end portion of the DR-side pivot shaft 23a at the base end thereof, so that the DR-side wiper arm 15a is centered on the axis of the pivot shaft 23a together with the DR-side pivot shaft 23a. As shown in FIG. Similarly, the AS-side drive unit 21b includes an AS-side pivot holder 22b fixed to the vehicle body 11a, and an AS-side pivot shaft 23b is rotatably supported by the pivot holder 22b. The AS-side wiper arm 15b is attached to the distal end portion of the AS-side pivot shaft 23b at the base end thereof, whereby the AS-side wiper arm 15b is centered on the axis of the pivot shaft 23b together with the AS-side pivot shaft 23b. As shown in FIG.

  In the present embodiment, the respective pivot shafts 23a, 23b are arranged on both the left and right sides of the vehicle body 11a, and the respective wiper blades 14a, 14b are located on the left and right sides of the windshield glass 12 and on the center. It swings in the wiping range between the positions. That is, the wiping pattern of the wiper device 13 is an opposing wiping type (overlap type). In the counter-wiping type wiping pattern, the wiper blades 14a and 14b overlap each other at the lower inverted position, but at that position, the DR-side wiper blade 14a is in contact with the AS-side wiper blade 14b. The upper side is polymerized. This is because when each wiper blade 14a, 14b wipes toward the lower inverted position, the arc-shaped wiping trace 12b in the DR-side visual field area formed by wiping the AS-side wiper blade 14b at the superposition site is Is set for wiping with the wiper blade 14a on the DR side following. Then, when each wiper blade 14a, 14b reaches the lower inversion position, the wiping trace 12a by the DR-side wiper blade 14a is finally located in the AS-side viewing area, and the DR-side viewing area is effective. Will be secured.

  The DR side drive unit 21a is provided with a DR side wiper motor 24a as its drive source, and the AS side drive unit 21b is provided with an AS side wiper motor 24b as its drive source.

  Next, the details of each of the drive units 21a and 21b will be described. In the present embodiment, the DR side drive unit 21a and the AS side drive unit 21b have basically the same structure. Hereinafter, only the driving unit 21a on the DR side will be described, and in the description, an additional note on the DR side will be omitted.

  2 is a perspective view showing details of the drive unit shown in FIG. 1, FIG. 3 is a perspective view showing details of the pivot holder shown in FIG. 2, and FIG. 4 is a perspective view showing details of the motor bracket shown in FIG. is there.

  The pivot holder 22a is made of aluminum die cast. As shown in FIG. 3, the pivot holder 22a includes a cylindrical support portion 25 that rotatably supports the pivot shaft 23a, and an attachment portion 26 that is formed integrally with the support portion 25. Have. A ring-shaped mount rubber 27 is attached to the mounting portion 26, and the pivot holder 22a is fixed to the vehicle body 11a by a fastening member such as a bolt (not shown) inserted through the mount rubber 27. The distal end portion of the pivot shaft 23a projects from one end side (vehicle outer side) of the support portion 25, the proximal end portion projects from the other end side (vehicle inner side) of the support portion 25, and the distal end portion of the pivot shaft 23a A screw portion 28 to which a nut for fixing the wiper arm 15a is screwed is provided.

  As shown in FIG. 4, the drive unit 21a is provided with a motor bracket 31 for fixing the wiper motor 24a to the vehicle body 11a. The motor bracket 31 is made of metal and is formed in a plate shape facing the bottom wall of the wiper motor 24a. Further, the motor bracket 31 is provided with two mounting portions 32, and ring-shaped mount rubbers 33 are mounted on these mounting portions 32, and the motor bracket 31 is inserted through these mount rubbers 33 (not shown). It is fixed to the vehicle body 11a by a fastening member such as a bolt.

  The wiper motor 24 a is fixed to the motor bracket 31 by three bolts 34, whereby the wiper motor 24 a is fixed to the vehicle body 11 a via the motor bracket 31. A through hole 31a is formed in the motor bracket 31, and the output shaft 35 of the wiper motor 24a fixed to the motor bracket 31 protrudes outside the motor bracket 31 through the through hole 31a. When the wiper motor 24a is fixed to the vehicle body 11a via the motor bracket 31, as shown in FIG. 2, the output shaft 35 of the wiper motor 24a is inclined by a predetermined angle α with respect to the pivot shaft 23a. .

  As shown in FIG. 3, the pivot holder 22a is integrally provided with a cylindrical holder-side connecting boss portion 36 protruding in a direction inclined with respect to the pivot shaft 23a. On the other hand, as shown in FIG. 4, the motor bracket 31 is provided with a cylindrical bracket-side connecting boss portion 37 that protrudes in a direction inclined with respect to the output shaft 35, integrally with the motor bracket 31. As shown in FIG. 2, the pivot holder 22 a and the motor bracket 31 are connected to each other by a connecting frame 38 as a connecting member fixed to these connecting boss portions 36 and 37. In the illustrated case, the connecting frame 38 is formed by cutting a straight iron pipe into a predetermined length, and one end of the connecting frame 38 is fitted into the holder-side connecting boss portion 36 and a bolt or the like not shown. The other end of the connecting frame 38 is fitted in the bracket side connecting boss portion 37 and fixed to the bracket side connecting boss portion 37 by a fastening member such as a bolt (not shown). . As described above, in the wiper device 13, the drive unit 21a is configured as one unit including the pivot shaft 23a, the wiper motor 24a, and the like by connecting the pivot holder 22a and the motor bracket 31 by the connection frame 38. The positional relationship between the pivot holder 22a and the motor bracket 31, that is, the positional relationship between the pivot shaft 23a and the output shaft 35 of the wiper motor 24a is ensured with high accuracy.

  In the present embodiment, the connecting member is a pipe-shaped connecting frame 38 having a circular cross section, but is not limited thereto, and other shapes such as a solid bar or a pipe material having a rectangular cross section, for example. These members may be used. Further, a connecting boss portion for fixing the mounting leg to the vehicle body and the connecting frame 38 is integrally formed on the gear case 48 of the wiper motor 24a, and the wiper motor 24a is connected to the pivot holder 22a by the connecting frame 38 without using the motor bracket 31. You may make it connect.

  FIG. 5 is a cross-sectional view showing the details of the wiper motor shown in FIG. 2. The wiper motor 24 a is an electric motor with a speed reduction mechanism, and includes a motor body 41 and a speed reducer 42.

  The motor main body 41 is a so-called brushed DC motor, and has a motor yoke 43 formed in a bottomed cylindrical shape. The armature 44 having an armature shaft 44a is rotatably accommodated in the motor yoke 43. Has been. A commutator 45 is fixed to the armature shaft 44a, and a pair of brushes 47 (only one is shown in the figure) are in sliding contact with the commutator 45. When a drive current is supplied to the armature 44 via the brush 47, the armature shaft 44a rotates in the forward or reverse direction according to the direction of the drive current.

  On the other hand, the speed reducer 42 has a gear case 48. The gear case 48 includes a metal case main body 48a formed in a bathtub shape and a resin cover 48b for closing the case main body 48a. It is fixed to the motor yoke 43 of the motor body 41. A reduction mechanism 51 is housed inside the gear case 48, and the rotation of the armature shaft 44a is reduced to a predetermined rotational speed by the reduction mechanism 51 and output from the output shaft 35. The speed reduction mechanism 51 is a worm gear mechanism. A worm 51a constituting the speed reduction mechanism 51 is integrally formed on an outer peripheral surface of an armature shaft 44a protruding into the case main body 48a, and a worm wheel 51b engaged with the worm 51a is formed on the case main body 48a. It is fixed to the base end portion of the output shaft 35 protruding inside. The case body 48a is provided with a boss portion 48c, and the output shaft 35 is rotatably supported by the boss portion 48c. A tip portion of the output shaft 35 protrudes outside the gear case 48 and protrudes from the through hole 31a of the motor bracket 31. Yes.

  In order to control the operation of the motor body 41, the wiper motor 24a is provided with a control device 52. In the illustrated case, the control device 52 has a plurality of electrical components 52b (one in the figure shown in the figure) such as a control element such as a CPU and a memory, and a power element such as an FET on a substrate 52a provided with wiring. Is shown, and is housed inside the gear case 48 in a state of being fixed inside the cover 48b. Further, as shown in FIG. 1, the control device 52 is connected to a battery (power source) 54 mounted on the vehicle 11 via a wiper switch 53 provided in the driver's seat, and when the wiper switch 53 is turned on, the battery A drive current is supplied from 54.

  In the present embodiment, the control device 52 is a control board provided in the gear case 48. However, the control device 52 is not limited to this and is provided as a unit separate from the wiper motor 24a. It may have a structure to be connected.

  The wiper motor 24a is provided with a rotation sensor 55 for detecting the rotation of the amateur shaft 44a. The rotation sensor 55 includes a multi-pole magnetized magnet 55a fixed to the amateur shaft 44a and a pair of hall sensors 55b disposed to face the magnet 55a. When the amateur shaft 44a rotates, each hall sensor 55b A pulse signal corresponding to the rotation of the amateur shaft 44a is output. These Hall sensors 55b are connected to the control device 52, and the control device 52 recognizes the rotation direction of the armature shaft 44a based on the order of appearance of the pulse signals input from each Hall sensor 55b, and determines the period of each pulse signal. The rotation speed of the armature shaft 44a is recognized based on the output shaft 35, that is, the wiper arm based on the integrated value (count value) with each pulse signal as a reference relative to the reference position (for example, the position corresponding to the lower inversion position of the wiper arm 15a). The position of 15a is recognized. Then, the control device 52 controls the operation of the motor body 41 so that the output shaft 35 is swung within a predetermined angle range around the axis center based on the recognition information. That is, the wiper motor 24a used in the wiper device 13 is a forward / reverse rotation type (reverse type) that swings and drives the wiper arm 15a by swinging the output shaft 35 within a predetermined angle range about the axis. ing.

  As shown in FIG. 1, the control device 52 of the DR-side wiper motor 24a and the control device 52 of the AS-side wiper motor 24b are connected to each other by a communication line 56, and the recognition information of each wiper motor 24a, 24b is the other wiper motor 24a, 24b. It is transmitted to the control device 52 via the communication line 56. The wiper motors 24a and 24b are controlled by the control devices 52 so that the wiper arms 15a and 15b do not interfere with each other.

  In the present embodiment, the motor main body 41 is a motor with a brush, but is not limited thereto, and may be another type of electric motor such as a brushless motor. Further, although the worm gear mechanism is used as the speed reduction mechanism 51, the present invention is not limited to this, and another speed reduction mechanism 51 may be used.

  As shown in FIG. 2, in order to transmit the swing motion of the output shaft 35 output from the wiper motor 24a to the pivot shaft 23a, the drive unit 21a is provided with a drive shaft 61 as a swing motion transmitting portion. The drive shaft 61 is formed of a steel material in a straight bar shape, and the pivot shaft 23 a is connected to the output shaft 35 via the drive shaft 61.

  In the present embodiment, the drive shaft 61 is formed in a rod shape with a circular cross section. However, the present invention is not limited to this, and other shape members such as a pipe material may be used.

  FIG. 6A is a side view showing details of the connecting portion between the pivot shaft and the drive shaft, and FIG. 6B is a side view showing details of the connecting portion between the output shaft of the wiper motor and the drive shaft.

  As shown in FIG. 6A, the drive shaft 61 is inclined with respect to the pivot shaft 23a by a predetermined angle β, and at one end thereof, a universal joint (universal joint) 62 is attached to the proximal end portion of the pivot shaft 23a. It is connected coaxially with the pivot shaft 23a. Further, as shown in FIG. 6B, the drive shaft 61 is inclined by a predetermined angle γ with respect to the output shaft 35 of the wiper motor 24a, and the universal shaft 63 of the output shaft 35 is connected at the other end. The tip is connected to the output shaft 35 coaxially. Here, the term “coaxial” means that the axial direction of the drive shaft 61 intersects with the axial direction of the pivot shaft 23a and the output shaft 35 at a predetermined angle, and these members rotate in the axial direction even if these members rotate around the axis. This means the positional relationship where the crossing position of s does not change.

  As shown in FIG. 3, the universal joint 62 includes a cross piece 62a integrally formed so that the two support shafts are orthogonal to each other at the midpoint. As shown in FIG. 6A, one of the cross pieces 62a is provided. The base end of the pivot shaft 23a is rotatably supported by the support shaft, and one end of the drive shaft 61 is rotatably supported by the other support shaft. In other words, the universal joint 62 is a hook type applying a spherical crank mechanism, and the universal joint 62 holds the angle β between the pivot shaft 23a and the drive shaft 61 inclined with respect to each other at a predetermined angle. Power can be transmitted in the state. Similarly, as shown in FIGS. 4 and 5, the universal joint 63 includes a cross piece 63 a integrally formed so that two support shafts are orthogonal to each other at the midpoint, and as shown in FIG. The tip of the output shaft 35 is rotatably supported by one support shaft of the cross piece 63a, and the other end of the drive shaft 61 is rotatably supported by the other support shaft. That is, the universal joint 63 is a hook type that applies a spherical crank mechanism, and the universal joint 63 holds the angle γ between the output shaft 35 and the drive shaft 61 inclined at a predetermined angle. Power can be transmitted in the state. Further, in the case of the cross piece in which the two support shafts of the universal joint 63 are separated and orthogonal to each other, the crossing position in the axial direction changes even if the cross piece rotates.

  That is, the pivot shaft 23a and the output shaft 35 of the wiper motor 24a inclined at a predetermined angle with respect to the pivot shaft 23a are connected via the universal joints 62 and 63 by the drive shaft 61 inclined with respect to them. . When the wiper motor 24 a is operated and the output shaft 35 swings, the swing motion is transmitted to the pivot shaft 23 a via the drive shaft 61.

As described above, in the wiper device 13, the pivot shaft 23 a to which the wiper arm 15 a is attached and the output shaft 35 of the wiper motor 24 a are connected by the drive shaft 61 via the universal joints 62 and 63, and the output shaft 35 is connected by the drive shaft 61. Is transferred to the pivot shaft 23a . Therefore, power transmission can be performed while maintaining the angle β between the pivot shaft 23a and the drive shaft 61 inclined with respect to each other at a predetermined angle, and the output shaft 35 inclined with respect to each other at a predetermined angle. Power can be transmitted to the drive shaft 61 while maintaining the angle γ. Therefore , the motion range of the power transmission structure that transmits power from the output shaft 35 to the pivot shaft 23a, that is, the required space can be reduced. Therefore, the mounting space of the vehicle body 11a to which the wiper device 13 is mounted can be reduced.

The wiper device 13 can transmit power while maintaining the angle β between the pivot shaft 23a and the drive shaft 61 that are inclined with respect to each other at a predetermined angle, and can also be inclined with respect to each other at a predetermined angle. Since power transmission can be performed while maintaining the angle γ between the output shaft 35 and the drive shaft 61, the rigidity of the power transmission structure that transmits power from the output shaft 35 to the pivot shaft 23a is increased. Further, it is possible to reduce an error in interlocking between the pivot shaft 23a and the output shaft 35. Accordingly, it is possible to facilitate the operation control of the wiper motor 24a by simplifying the control program of the control device 52 without considering the error of the interlocking between the output shaft 35 and the pivot shaft 23a.

  Further, in the wiper device 13, the DR-side wiper arm 15a and the AS-side wiper arm 15b are driven to swing by the separate drive units 21a and 21b, so that the layout of the drive units 21a and 21b on the vehicle body 11a is achieved. Can be increased.

  FIG. 7A is a side view showing a modification of the drive unit shown in FIG. 2, and the drive shaft is inclined only with respect to the output shaft. FIG. 7B is a view of the drive unit shown in FIG. It is a side view which shows the case where it is a modification and a drive shaft inclines only with respect to a pivot axis.

  In the case illustrated in FIG. 2, the drive shaft 61 is disposed to be inclined with respect to both the pivot shaft 23 a and the output shaft 35. However, the present invention is not limited to this, and as illustrated in FIG. May be inclined only with respect to the output shaft 35, or as shown in FIG. 7B, the drive shaft 61 may be inclined only with respect to the pivot shaft 23a. When the drive shaft 61 is inclined only with respect to the output shaft 35, as shown in FIG. 7A, the universal joint 63 is used only for connecting the output shaft 35 and the drive shaft 61, and the pivot shaft 23a is simple. It is connected to the drive shaft 61 by a joint. On the other hand, when the drive shaft 61 is inclined only with respect to the pivot shaft 23a, the universal joint 62 is used only for connecting the pivot shaft 23a and the drive shaft 61 as shown in FIG. Is connected to the drive shaft 61 by a simple joint.

  FIG. 8 is a perspective view showing a modification of the drive unit shown in FIG.

  In the case shown in FIG. 2, the drive shaft 61 is formed in a straight rod shape with a steel material, and both ends of the drive shaft 61 are connected to the pivot shaft 23 a and the output shaft 35 via universal joints 62 and 63. Yes. In this case, the drive shaft 61 has a predetermined rigidity in the bending direction and does not bend during operation. On the other hand, in the case shown in FIG. 8, the drive shaft 71 is formed by a flexible shaft (flexible shaft). Here, the flexible shaft is a flexible shaft that can transmit rotational power and can freely change its axial direction.

  Therefore, even if the output shaft 35 is inclined with respect to the pivot shaft 23a, one end of the drive shaft 71 is connected to the pivot shaft 23a without using the universal joint 62 as shown in FIG. The end can be connected to the output shaft 35 without using the universal joint 63, and the swinging motion of the output shaft 35 can be transmitted to the pivot shaft 23a by the drive shaft 71.

  As described above, in the wiper device 13, the drive shaft 71 that connects the output shaft 35 and the pivot shaft 23 a is formed by the flexible shaft. Therefore, the connection structure of the drive shaft 71 and the output shaft 35, and the drive shaft 71. And the pivot shaft 23a can be simplified, whereby the cost of the wiper device 13 can be reduced.

  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 present embodiment, the universal joints 62 and 63 are hook-type ones having cross pieces 62a and 63a. However, the present invention is not limited to this, and for example, a ball joint having a ball joint is used. Other types of universal joints may be used as long as they are universal joints capable of transmitting power between mutually inclined shafts.

  In the present embodiment, the wiper device 13 includes a pair of drive units 21a and 21b. However, the present invention is not limited to this, and the present invention may be applied to a wiper device including only one drive unit. .

  Further, even if the output shaft 35 of the wiper motor 24a is not inclined by the predetermined angle α with respect to the pivot shaft 23a, the output shaft 35 and the pivot shaft 23a are arranged in parallel and connected by a flexible joint or the like. May be.

  Further, in the present embodiment, the wiping pattern of the wiper device 13 is a counter wiping type, but is not limited thereto, and may be a tandem type.

It is explanatory drawing which shows a part of vehicle provided with the wiper apparatus for vehicles which is one embodiment of this invention. It is a perspective view which shows the detail of the drive unit shown in FIG. It is a perspective view which shows the detail of the pivot holder shown in FIG. It is a perspective view which shows the detail of the motor bracket shown in FIG. It is sectional drawing which shows the detail of the wiper motor shown in FIG. (A) is a side view which shows the detail of the connection part of a pivot axis | shaft and a drive shaft, (b) is a side view which shows the detail of the connection part of the output shaft of a wiper motor, and a drive shaft. (A) is a modified example of the drive unit shown in FIG. 2, and is a side view showing a case where the drive shaft is inclined only with respect to the output shaft, and (b) is a modified example of the drive unit shown in FIG. FIG. 6 is a side view showing a case where the drive shaft is inclined only with respect to the pivot axis. It is a perspective view which shows the modification of the drive unit shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Vehicle 11a Car body 12 Windshield glass 12a, 12b Wipe trace 13 Vehicle wiper device 14a DR side wiper blade 14b AS side wiper blade 15a DR side wiper arm 15b AS side wiper arm 21a DR side drive unit 21b AS side Drive unit 22a DR side pivot holder 22b AS side pivot holder 23a DR side pivot shaft 23b AS side pivot shaft 24a DR side wiper motor 24b AS side wiper motor 25 Support portion 26 Mounting portion 27 Mount rubber 28 Screw portion 31 Motor Bracket 31a Through hole 32 Mounting portion 33 Mount rubber 34 Bolt 35 Output shaft 36 Holder side connection boss portion 37 Bracket side connection boss portion 38 Connection frame (connection member)
41 Motor body 42 Reducer 43 Motor yoke 44 Amateur 44a Amateur shaft 45 Commutator 46 Brush holder 47 Brush 48 Gear case 48a Case body 48b Cover 48c Boss part 51 Deceleration mechanism 51a Warm 51b Warm wheel 52 Controller 52a Board 52b Electrical component 53 Wiper switch 54 battery 55 rotation sensor 55a multipolar magnet 55b hall sensor 56 communication line 61 drive shaft 62, 63 universal joint 62a, 63a cross piece 71 drive shaft α, β, γ angle

Claims (6)

A vehicle wiper device comprising a wiper arm to which a wiper blade is attached, and a drive unit for swinging and driving the wiper arm,
The drive unit is
A pivot shaft to which the wiper arm is attached;
A pivot holder fixed to the vehicle body and rotatably supporting the pivot shaft;
A wiper motor having an output shaft that swings in a predetermined angle range about an axis, and connected to the pivot holder by a connecting member;
Coupled to said pivot shaft and said output shaft, have a rocking vibration transmitting portion which transmits the rocking motion of said output shaft to said pivot axis, the swing motion transmitting section given to the pivot axis And the oscillating motion transmitting portion is inclined by a predetermined angle with respect to the output shaft,
When the swing motion of the output shaft is changed to the pivot shaft via the swing motion transmitting portion, a predetermined inclination angle is maintained between the output shaft and the swing motion transmitting portion, and A vehicle wiper device configured to perform power transmission while maintaining a predetermined inclination angle between a pivot shaft and the oscillating motion transmission unit . A vehicle wiper device comprising a wiper arm to which a wiper blade is attached, and a drive unit for swinging and driving the wiper arm,
The drive unit is
A pivot shaft to which the wiper arm is attached;
A pivot holder fixed to the vehicle body and rotatably supporting the pivot shaft;
A motor bracket connected to the pivot holder by a connecting member and fixed to the vehicle body;
A wiper motor having an output shaft that swings within a predetermined angle range about an axis, and fixed to the motor bracket;
Coupled to said pivot shaft and said output shaft, have a rocking vibration transmitting portion which transmits the rocking motion of said output shaft to said pivot axis, the swing motion transmitting section given to the pivot axis And the oscillating motion transmitting portion is inclined by a predetermined angle with respect to the output shaft,
When the swing motion of the output shaft is changed to the pivot shaft via the swing motion transmitting portion, a predetermined inclination angle is maintained between the output shaft and the swing motion transmitting portion, and A vehicle wiper device configured to perform power transmission while maintaining a predetermined inclination angle between a pivot shaft and the oscillating motion transmission unit . 3. The vehicle wiper device according to claim 1, wherein the output shaft and the swing motion transmitting portion are connected by a universal joint, and the swing motion transmitting portion is inclined at a predetermined angle with respect to the output shaft. A vehicle wiper device. The wiper device for a vehicle according to any one of claims 1 to 3, wherein the pivot shaft and the swing motion transmitting portion are connected by a universal joint, and the swing motion transmitting portion is connected to the pivot shaft. A vehicle wiper device characterized by being inclined at a predetermined angle .   3. The vehicle wiper device according to claim 1 or 2, wherein the swinging motion transmitting portion is formed of a flexible shaft.   6. The vehicle wiper device according to claim 1, wherein the driver seat side drive unit swingably drives the driver seat side wiper arm to which the driver seat side wiper blade is attached, and the passenger seat. And a passenger-side drive unit that swingably drives a passenger-side wiper arm to which a side wiper blade is attached.

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