JP2010260509A - Wiper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To downsize a fastening structure of a wiper motor suppressed in a crush of a frame member. <P>SOLUTION: A fixing hole 40 and a through-hole 41 paired with a motor fixing part 26a are formed coaxially with each other. An abutting part 42 press-worked to have a flat surface is provided at the outer periphery of the fixing hole 40. A projecting part 44 projecting toward the motor fixing part 26a is formed on a motor bracket 30b. The projecting part 44 has a substantially cylindrical shape inserted into the through-hole 41 and forms a female screw 44a inside. The end surface 44b of the projecting part 44 is opposed to the inner surface 42a of the abutting part 42 with a predetermined gap D. The motor fixing part 26a and the motor bracket 30b are fixed by pushing the motor fixing part 26a toward the motor bracket 30b with a bolt 32 fixed to the projecting part 44 through the fixing hole 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wiper device that wipes a wiping surface by swinging a wiper member by a wiper motor.

  A vehicle such as an automobile is equipped with a wiper device for wiping off deposits such as rainwater adhering to the windshield to ensure the driver's view. The wiper device includes a wiper motor as a drive source, a pivot shaft to which the wiper member is attached, and a link mechanism (power transmission member) that converts the rotational motion of the wiper motor into the swing motion of the pivot shaft. In this wiper device, the wiper motor swings and drives the pivot shaft via a link mechanism, so that the wiper member slides on the windshield and wipes off deposits attached to the windshield.

  The pivot shaft of the wiper device mounted in the cowl formed on the front side of the vehicle is swingably supported by a pivot holder fixed in the cowl with the tip side protruding outside the vehicle. As such a wiper device, there is a so-called modular type wiper device in which a pivot holder on the driver's seat side and the passenger seat side are connected by a frame member (see, for example, Patent Document 1). In this wiper device, the wiper motor and the pivot holder are unitized by fastening the wiper motor bracket and the frame member with a fixing member such as a bolt.

  A hollow cylindrical pipe is used for the frame member in order to reduce the weight of the wiper device. Therefore, it is necessary to have a wiper motor fastening structure that prevents the frame member from being crushed by the fastening thrust of the fixing member when fastening the bracket and the frame member of the wiper motor. For example, in the wiper device described in Patent Document 1, a frame support portion that covers substantially the lower half of the outer periphery of the frame member is provided on the bracket of the wiper motor, and between the frame member and the fixing member, substantially above the outer periphery of the frame member. A frame cover (patch) covering the half is interposed. Thereby, even if a crushing load is applied to the frame member due to the fastening thrust of the fixing member, almost the entire outer periphery of the frame member is covered, so that the crushing of the frame member can be suppressed.

JP 11-278219 A

  By the way, since the inside of the cowl in which the wiper device is mounted is a limited space, it is preferable to downsize the wiper device. However, in the wiper device described in Patent Document 1, a protrusion that protrudes on the opposite side to the frame member side is provided on the bracket of the wiper motor, and a bolt (fixing member) is fastened at the female screw portion formed on the protrusion. Thus, the wiper motor fastening structure is increased in size. Further, since the frame member is prevented from being crushed by interposing the frame cover between the frame member and the fixing member, the number of parts increases, leading to an increase in the size and cost of the wiper motor.

  An object of the present invention is to reduce the size of a wiper motor fastening structure that prevents the frame member from being crushed.

  The wiper device of the present invention is formed to extend in the longitudinal direction, a wiper motor including a motor main body, a speed reduction mechanism that transmits the rotation of the motor main body to an output shaft, and a gear case that houses the speed reduction mechanism. A hollow frame member to which the provided motor bracket is attached; a pivot holder fixed to the frame member; and a pivot shaft that is swingably supported by the pivot holder and to which a wiper member for wiping the wiping surface is attached. A wiper device having a power transmission member for converting the rotational movement of the output shaft into the swinging movement of the pivot shaft, the insertion member being provided in the frame member and opening to the motor bracket side; A motor fixing portion including a fixing hole formed to have a smaller diameter than the hole, and a contact portion formed on an outer peripheral portion of the fixing hole; A protrusion provided on the motor bracket, inserted through the insertion hole and having a tip end surface in contact with the inner surface of the contact portion or facing through a predetermined gap, and connected to the protrusion portion through the fixing hole And a fixing member that presses the motor fixing portion toward the motor bracket at the contact portion.

  The wiper device according to the present invention is characterized in that the fixing member is a screw member fastened to a female screw portion formed in the protruding portion.

  The wiper device according to the present invention is characterized in that the fixing member is a caulking portion formed integrally with a tip end portion of the protruding portion.

  The wiper device of the present invention is characterized in that the outer surface of the contact portion is flat.

  The wiper device according to the present invention is characterized in that a plurality of pairs of the insertion holes and the fixing holes forming a pair are formed in the motor fixing portion in the longitudinal direction of the frame body.

  According to the present invention, the motor bracket is provided with the protruding portion that is inserted through the insertion hole and has the tip surface abutting against the inner surface of the abutting portion or facing the inner surface of the abutting portion. By abutting the front end surface of the motor, it is possible to suppress the crushing of the motor fixing portion due to the fastening thrust of the fixing member. As a result, it is not necessary to provide a frame cover for preventing the frame fixing portion from being crushed, so that the number of components in the wiper motor fastening structure can be reduced. Therefore, it is possible to reduce the size of the wiper motor fastening structure, reduce the cost of the wiper device, and improve workability when fixing the fixing member. Further, since the fixing member is connected to the protruding portion inserted into the motor fixing portion, the fastening structure of the wiper motor can be reduced while maintaining the fastening strength between the motor fixing portion and the motor bracket.

  According to the present invention, since the outer surface of the abutting portion is flat, the strength of the abutting portion can be improved and the fastening between the fixing member and the outer surface of the abutting portion can be stably and not easily loosened. .

It is explanatory drawing which shows the front side of the vehicle carrying the wiper apparatus which is one embodiment of this invention. It is a perspective view which shows the wiper apparatus of FIG. It is a perspective view which shows the wiper apparatus of FIG. 2 from the back side. It is a perspective view which expands and shows the fastening structure of a wiper motor. FIG. 5 is an exploded perspective view of FIG. 4. It is sectional drawing which follows the AA line in FIG. It is sectional drawing which shows the fastening structure of the wiper motor in the wiper apparatus which is other embodiment of this invention.

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

  As shown in FIG. 1, on the windshield (wind shield) 11 provided on the front side of the vehicle 10, a wiper on the DR side (driver's seat side) that wipes out deposits such as rainwater attached to the windshield 11. A member 12 and a wiper member 13 on the AS side (passenger seat side) are provided. The wiper members 12 and 13 include wiper blades 12a and 13a that slide on the windshield 11 as wiping surfaces, and wiper arms 12b and 13b that swing the wiper blades 12a and 13a. The wiper blades 12a and 13a are rotatably attached to the tips of the wiper arms 12b and 13b, and elastically contact the windshield 11 by coil springs (tensile springs) (not shown) provided inside the wiper arms 12b and 13b. It is like that.

  The wiper blades 12a and 13a are swung between the lower inversion position LRP and the upper inversion position URP on the windshield 11 together with the wiper arms 12b and 13b. Accordingly, the wiper blades 12a and 13a perform wiping operations in the same direction in synchronization with the wiping ranges 11a and 11b formed between the lower inversion position LRP and the upper inversion position URP. That is, the wiping pattern of the wiper blades 12a and 13a is a tandem type.

  On the front end side of the windshield 11 in the vehicle 10, a wiper device 14 for wiping the windshield 11 by driving the wiper members 12 and 13 to swing is mounted. The wiper device 14 is disposed in a cowl 15 formed on the front side of the vehicle 10 and is covered with a cowl top panel 16 that closes the opening side (front side in the drawing) of the cowl 15. The cowl top panel 16 has a DR side through hole 16a and an AS side through hole 16b. From the through holes 16 a and 16 b, the distal end sides of the DR-side pivot shaft 17 a and the AS-side pivot shaft 17 b constituting the wiper device 14 extend toward the outside of the vehicle 10. The wiper members 12 and 13 are fixed to the distal ends of the pivot shafts 17a and 17b at the base ends of the wiper arms 12b and 13b, and are driven to swing by the pivot shafts 17a and 17b.

  2 is a perspective view showing the wiper device of FIG. 1, and FIG. 3 is a perspective view showing the wiper device of FIG. 2 from the back side.

  As shown in FIGS. 2 and 3, the wiper device 14 has a DR side pivot holder 20a and an AS side pivot holder 20b for supporting the pivot shafts 17a and 17b. The pivot shafts 17a and 17b are inserted into the cylindrical support portions 21a and 21b of the pivot holders 20a and 20b on the base end sides thereof, and via pivot bearings (not shown) mounted inside the cylindrical support portions 21a and 21b. , 20b is swingably supported.

  The pivot holders 20a and 20b are provided with mounting legs 23a and 23b for fixing the pivot holders 20a and 20b in the cowl 15. A rubber bush 24 is attached to a bolt insertion hole formed in the attachment legs 23a and 23b. The pivot holders 20a and 20b are fixed in the cowl 15 by fastening fastening bolts (not shown) inserted through the bushes 24 to the vehicle body panel in the cowl 15. Further, the pivot holders 20a and 20b are provided with connecting portions 25a and 25b extending on the opposite sides of the pivot holders 20a and 20b. Both ends of the frame member 26 are fitted and fixed to the connecting portions 25a and 25b, respectively, so that the DR side pivot holder 20a and the AS side pivot holder 20b are connected by the frame member 26.

  A hollow cylindrical pipe is used for the frame member 26 in order to reduce the weight of the wiper device 14. The frame member 26 is formed to extend in the longitudinal direction of the frame member 26 (the vehicle width direction of the vehicle 10) so that the pivot holders 20a and 20b connected to both ends thereof are in a predetermined relative position. Therefore, by preparing the frame members 26 having different lengths, it is possible to deal with various vehicles having different dimensions in the vehicle width direction. A motor fixing portion 26a to which a wiper motor 27 as a drive source is attached is formed on the DR side pivot holder 20a side of the frame member 26.

  The wiper motor 27 is a motor with a speed reduction mechanism that includes a motor main body 28 and a speed reduction mechanism (not shown) that transmits the rotation to the output shaft 29 by reducing the rotation of the motor main body 28. The motor main body 28 is attached to a gear case 30 that houses a speed reduction mechanism, and the rotation of the motor main body 28 is transmitted to the output shaft 29 via the speed reduction mechanism. The output shaft 29 is rotatably supported by the gear case 30 with the tip portion protruding from the gear case 30. Note that various types of electric motors such as a brushed electric motor and a brushless electric motor can be used as the motor body 11.

  The gear case 30 is integrally provided with an attachment leg 30a for fixing the wiper motor 27 in the cowl 15. A rubber bush 31 is attached to an insertion hole for inserting a bolt formed in the attachment leg 30a. The wiper motor 27 is fixed in the cowl 15 by fastening a fastening bolt (not shown) inserted through the bush 31 to the vehicle body panel in the cowl 15. Further, the gear case 30 is integrally provided with a motor bracket 30b that protrudes toward the motor fixing portion 26a side of the frame member 26. In the motor bracket 30 b, the wiper motor 27 is attached to the motor fixing portion 26 a of the frame member 26 with bolts (fixing members) 32. That is, the wiper device 14 is a frame-integrated modular wiper device in which the pivot holders 20a and 20b and the wiper motor 27 are connected by the frame member 26.

  One end of a link plate 33 bent to have a stepped shape is fixed to the tip of the output shaft 29 of the wiper motor 27. One end of a plate-shaped drive lever 34 is fixed to the base end of the AS-side pivot shaft 17b. The other end of the link plate 33 and the other end of the drive lever 34 are connected to the other end of the link plate 33 and the drive lever 34 via a ball joint so that both ends of the connection rod 35 can rotate. The parts are connected by a connecting rod 35. Thus, the AS-side pivot shaft 17b is swung by rotating the output shaft 29. On the other hand, one end portion of a plate-shaped drive lever 36 is fixed to the base end portion of the DR side pivot shaft 17a, and both end portions of the connecting rod 37 are connected to the other end portions of the drive levers 34, 36 via ball joints. Are connected to each other so that the other end of the drive lever 34 and the other end of the drive lever 36 are connected by a connecting rod 37. Thus, the DR-side pivot shaft 17a is swung in the same direction in synchronization with the swinging motion of the AS-side pivot shaft 17b.

  The link plate 33, the connecting rods 35 and 37, and the drive levers 34 and 36 constitute a link mechanism as a power transmission member. By this link mechanism, the rotational motion of the output shaft 29 is converted into the swing motion of the pivot shafts 17a and 17b. That is, when the wiper motor 27 is driven by operating an operation switch provided in the vehicle interior, the rotational movement of the output shaft 29 is transmitted to the pivot shafts 17a and 17b via the link mechanism, and the wiper members 12 and 13 are swung. It is designed to be driven dynamically.

  Next, a fastening structure of the wiper motor 27 for attaching the wiper motor 27 to the frame member 26 will be described in detail. 4 is an enlarged perspective view showing the fastening structure of the wiper motor, FIG. 5 is an exploded perspective view of FIG. 4, and FIG. 6 is a cross-sectional view taken along line AA in FIG.

  As shown in FIGS. 4 to 6, the wiper motor 27 is fixed to the motor fixing portion 26 a of the frame member 26 by bolts 32 in a motor bracket 30 b provided integrally with the gear case 30. Two pairs of fixing holes 40 and insertion holes 41 forming a pair are formed in the motor fixing portion 26 a at a predetermined interval in the longitudinal direction of the frame member 26. The fixing hole 40 is a circular hole that is formed to have a diameter slightly larger than the diameter of the male screw portion 32a of the bolt 32 and opens on the opposite side (left side in FIG. 6) to the motor bracket 30b side. The insertion hole 41 is a circular hole that is formed to have a diameter larger than the diameter of the fixed hole 40 and opens to the motor bracket 30b side (right side in FIG. 6). The fixing hole 40 and the insertion hole 41 are formed so as to be coaxially opened in a direction orthogonal to the longitudinal direction of the frame member 26.

  A contact portion (emboss flat surface portion) 42 is provided on the outer peripheral portion of the fixing hole 40 in the motor fixing portion 26a so as to protrude on the opposite side to the motor bracket 30b side. The abutting portion 42 is pressed by a convex mold that is inserted from the insertion hole 41 and abuts against the inner surface 42a of the abutting portion 42, and a concave mold that abuts against the outer surface 42b of the abutting portion 42 (see FIG. By embossing, the outer surface 42b is formed in a planar shape orthogonal to the opening direction of the fixing hole 40. That is, the contact portion 42 is formed in a substantially circular shape having substantially the same diameter as the diameter of the insertion hole 41.

  On the other hand, a semicircular frame support portion 43 that is open to the motor fixing portion 26a is integrally provided on the motor bracket 30b that protrudes from the gear case 30 to the motor fixing portion 26a. On the inner surface of the frame support portion 43, a frame pressure-bonding surface 43a is formed that is formed to have substantially the same diameter as the outer diameter of the motor fixing portion 26a.

  The frame support portion 43 is integrally provided with two projecting portions 44 at a predetermined interval in the longitudinal direction of the frame member 26 so as to correspond to the insertion hole 41 formed in the motor fixing portion 26a. The protruding portion 44 is formed in a substantially cylindrical shape that protrudes from the center portion of the frame crimping surface 43a to the side opposite to the motor bracket 30b side (motor fixing portion 26a side). Further, the protruding portion 44 has an outer diameter that is larger than the diameter of the fixed hole 40 and slightly smaller than the diameter of the insertion hole 41, and has an inner diameter that is substantially the same as the diameter of the male screw portion 32 a of the bolt 32. A female threaded portion 44a that engages with the male threaded portion 32a of the bolt 32 is formed on the inner surface of the protruding portion 44 that opens to the side opposite to the motor bracket 30b side.

  As shown in FIG. 6, the motor fixing portion 26 a and the motor bracket 30 b are connected to the female screw portion 44 a of the protruding portion 44 and the male screw of the bolt 32 inserted into the fixing hole 40 with the protruding portion 44 inserted into the insertion hole 41. It is fixed by fastening the part 32a. In a state where the protrusion 44 is inserted into the insertion hole 41 and the motor fixing portion 26a and the motor bracket 30b are assembled, the tip end surface 44b of the protrusion 44 inserted through the insertion hole 41 and extending toward the fixing hole 40 is It faces the inner surface 42a of the contact portion 42 with a predetermined gap D therebetween. Further, in the motor fixing portion 26a, the outer surface of the supported portion 26b formed in the almost half on the motor bracket 30b side is brought into contact with the frame crimping surface 43a of the frame supporting portion 43, and the supported portion 26b becomes the frame supporting portion 43. Covered by. Therefore, the protrusion 44 is inserted into the insertion hole 41 and the motor fixing portion 26a is supported by the frame support portion 43 so that the opening of the protrusion 44 is opposite to the motor bracket 30b side through the fixing hole 40. The motor fixing portion 26a and the motor bracket 30b are positioned so as to open to the side.

  Then, with the motor fixing portion 26a and the motor bracket 30b positioned, the bolt 32 is inserted into the fixing hole 40, and the male screw portion 32a of the bolt 32 and the female screw portion 44a of the protruding portion 44 are fixed. In the bolt 32, the head portion 32 b comes into contact with the outer surface 42 b of the contact portion 42 when the male screw portion 32 a is screwed into the female screw portion 44 a of the protruding portion 44. The motor fixing portion 26a is pressed against the motor bracket 30b side by the fastening thrust of the bolt 32 applied to the motor fixing portion 26a at the contact portion 42. That is, the motor fixing portion 26a and the motor bracket 30b are fixed by pressing the outer surface of the supported portion 26b of the motor fixing portion 26a to the frame pressing surface 43a of the frame supporting portion 43.

  At this time, even if a crushing load that crushes the motor fixing portion 26a toward the motor bracket 30b in the contact portion 42 by the fastening thrust of the bolt 32 is applied, the supported portion 26b of the motor fixing portion 26a is supported by the frame support portion 43. Therefore, the supported portion 26b is crushed and the supported portion 26b is prevented from spreading in the vertical direction in FIG. As a result, a reaction force against the crushing load acts on the bolt 32 from the frame support portion 43 to the head portion 32b via the motor fixing portion 26a, thereby preventing the bolt 32 from being loosened. Thus, the motor fixing portion 26a and the motor bracket 30b are firmly fixed.

  Further, when the motor fixing portion 26a is crushed to some extent (by a predetermined gap D) due to the crushing load applied to the motor fixing portion 26a by the fastening thrust of the bolt 32, the inner surface 42a of the contact portion 42 is a protruding portion. 44, the motor fixing portion 26a is prevented from being further crushed. Here, it is preferable that the predetermined gap D is set to a degree that does not lead to damage to the motor fixing part 26a, deterioration in design, or the like even if the motor fixing part 26a is crushed by the predetermined gap D. When the motor fixing portion 26a and the motor bracket 30b are fastened, the motor fixing portion 26a is intentionally crushed by the fastening thrust of the bolt 32, and the inner surface 42a of the contact portion 42 is crimped to the tip end surface 44b of the protruding portion 44. Thus, a reaction force against the crushing load is applied to the bolt 32 from the protruding portion 44 to the head portion 32b via the abutting portion 42, and the bolt 32 is prevented from being loosened. You may make it fix the fixing | fixed part 26a and the motor bracket 30b more firmly.

  As described above, since the projecting portion 44 that is inserted through the insertion hole 41 and the front end surface 44b faces the inner surface 42a of the contact portion 42 via the predetermined gap D is provided on the motor bracket 30b, the inner surface of the contact portion 42 is provided. Since 42a contacts the front end surface 44b of the projecting portion 44, it is possible to prevent the motor fixing portion 26a from being crushed by the fastening thrust of the bolt 32. This eliminates the need for a frame cover for suppressing the collapse of the frame fixing portion 26a as in the prior art between the head portion 32b of the bolt 32 and the motor fixing portion 26a. The score can be reduced. Therefore, the size of the fastening structure of the wiper motor 27 can be reduced, the cost of the wiper device 14 can be reduced, and the workability when fastening the bolts 32 can be improved because the frame cover is not interposed.

  Further, since the female screw portion 44a that engages with the male screw portion 32a of the bolt 32 is formed in the protruding portion 44 that protrudes into the motor fixing portion 26a, the motor fixing portion from the frame support portion 43 as in the prior art. Since it is not necessary to form the female thread portion in the protruding portion that protrudes on the opposite side to the 26a side, the protruding length L from the gear case 30 to the frame support portion 43 can be formed short. Therefore, the fastening structure of the wiper motor 27 can be reduced in size while maintaining the fastening strength between the motor fixing portion 26a and the motor bracket 30b. In addition, since the female screw portion 44a of the projecting portion 44 can be fastened over almost the entire length of the male screw portion 32a of the bolt 32, the motor fixing portion 26a and the motor bracket 30b can be more firmly fixed.

  Further, by inserting the protruding portion 44 into the insertion hole 41, the motor fixing portion 26a and the motor bracket 30b are arranged such that the opening of the protruding portion 44 opens to the opposite side of the motor bracket 30b via the fixing hole 40. Therefore, the workability at the time of fastening the bolt 32 is improved.

  Furthermore, by forming the insertion hole 41 with a diameter larger than the diameter of the fixed hole 40, it becomes possible to insert the convex mold that is abutted against the inner surface 42a of the abutting portion 42 from the insertion hole 41. The contact portion 42 can be pressed so that the outer surface 42b of the contact portion 42 with which the head portion 32b of the bolt 32 abuts is flat without providing a separate member such as a frame cover. Therefore, by making the outer surface 42b of the contact portion 42 flat, the strength of the contact portion 42 can be improved, and the contact between the head portion 32b of the bolt 32 and the outer surface 42b of the contact portion 42 is stably loosened. A difficult fastening is possible.

  In the above-described embodiment, the length of the protruding portion 44 in the longitudinal direction is set so that the front end surface 44b of the protruding portion 44 faces the inner surface 42a of the contact portion 42 with a predetermined gap D therebetween. Although the motor fixing portion 26a is allowed to be crushed to some extent, the length of the protruding portion 44 is set so that the tip end surface 44b of the protruding portion 44 is disposed in contact with the inner surface 42a of the contacting portion 42. By setting the direction length, it may be possible to further suppress the crushing of the motor fixing portion 26a.

  As described above, in the above-described embodiment, the motor fixing portion 26a and the motor bracket 30b are fixed by connecting the bolt 32 as a fixing member to the protruding portion 44 through the fixing hole 40. Of course, the fixing member is not limited to the bolt 32. For example, a male screw portion that protrudes to the outside of the motor fixing portion 26a through the fixing hole 40 is integrally provided at the distal end portion of the protruding portion 40, and the male screw portion and a nut as a fixing member are fastened, that is, the fixing hole 40. The motor fixing portion 26a and the motor bracket 30b may be fixed by connecting the nut and the projecting portion 44 via the pin. Further, the motor fixing portion 26a and the motor bracket 30b may be fixed by a caulking portion (fixing member) integrally formed at the distal end portion of the protruding portion. FIG. 7 is a cross-sectional view showing a fastening structure of a wiper motor in a wiper device according to another embodiment of the present invention. In FIG. 7, members similar to those shown in FIG. 6 are given the same reference numerals, and descriptions thereof are omitted.

  As shown in FIG. 7, the protrusion 50 provided integrally with the frame support 43 has a substantially cylindrical shape protruding from the center of the frame crimping surface 43 a of the frame support 43 to the side opposite to the motor bracket 30 b side. Is formed. The protruding portion 50 has an outer diameter that is larger than the diameter of the fixed hole 40 and slightly smaller than the diameter of the insertion hole 41. A caulking portion 50b that protrudes from the distal end surface 50a to the side opposite to the motor bracket 30b side is integrally formed at the distal end portion of the protruding portion 50. The caulking portion 50 b is formed in a diameter smaller than the diameter of the fixing hole 40 and has a substantially cylindrical shape that can be inserted into the fixing hole 40.

  The motor fixing part 26a and the motor bracket 30b are fixed by caulking of the caulking part 50b inserted into the fixing hole 40 in a state where the protruding part 50 is inserted into the insertion hole 41. In a state in which the protrusion 50 is inserted into the insertion hole 41 and the motor fixing portion 26a and the motor bracket 30b are assembled, the distal end surface 50a of the protrusion 50 inserted through the insertion hole 41 and extending toward the fixing hole 40 is It abuts against the inner surface 42 a of the abutting portion 42. Further, the caulking portion 50 b protrudes outside the frame fixing portion 26 a through the fixing hole 40. Due to the caulking of the caulking portion 50b, the caulking portion 50b is brought into contact with the outer surface 42b of the abutting portion 42, and the pressing force by caulking applied to the motor fixing portion 26a at the abutting portion 42 causes the motor fixing portion 26a to move to the motor bracket 30b. Pressed to the side. That is, the motor fixing portion 26a and the motor bracket 30b are fixed by pressing the outer surface of the supported portion 26b of the motor fixing portion 26a to the frame pressing surface 43a of the frame supporting portion 43.

  At this time, even if a crushing load is applied to the abutting portion 42 to crush the motor fixing portion 26a toward the motor bracket 30b due to the pressing force by caulking, the tip end surface 50a of the protruding portion 50 is the inner surface 42a of the abutting portion 42 Therefore, the crushing of the motor fixing portion 26a is suppressed. As a result, a reaction force against the crushing load acts on the abutting portion 42 from the protruding portion 44 toward the caulking portion 50b side (the opposite side to the motor bracket 30b side). Occurrence of loosening between the contact portion 42 and the motor fixing portion 26a and the motor bracket 30b is firmly fixed.

  Thus, since the motor fixing portion 26a and the motor bracket 30b are fixed by integrally connecting the caulking portion 50b and the protruding portion 50 via the fixing hole 40, components in the fastening structure of the wiper motor 27 are provided. The score can be further reduced. Therefore, the cost of the wiper device 14 can be further 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 above embodiment, the motor bracket 30b is provided integrally with the gear case 30, but the motor bracket 30b may be provided as a separate member from the gear case 30.

  Moreover, in the said embodiment, although the frame member 26 was made into the hollow cylindrical shape, you may use the hollow member of other shapes, such as a cross-sectional shape, for example, a hexagon.

  Furthermore, in the above-described embodiment, the two pairs of fixing holes 40 and the insertion holes 41 are formed in the motor fixing portion 26a, and the two protrusions 44 are provided in the motor bracket 30b. The numbers of the insertion holes 41 and the protrusions 44 are arbitrary.

10 Vehicle 11 Windshield (wiping surface)
11a, 11b Wiping range 12, 13 Wiper member 12a, 13a Wiper blade 12b, 13b Wiper arm 14 Wiper device 15 Cowl 16 Cowl top panel 16a, 16b Through-holes 17a, 17b Pivot shaft 20a, 20b Pivot holder 21a, 21b Cylindrical support portion 23a , 23b Mounting leg 24 Bushing 25a, 25b Connecting part 26 Frame member 26a Motor fixing part 26b Supported part 27 Wiper motor 28 Motor body 29 Output shaft 30 Gear case 30a Mounting leg part 30b Motor bracket 31 Bushing 32 Bolt (fixing member)
32a Male thread portion 32b Head portion 33 Link plate 34 Drive lever 35 Connection rod 36 Drive lever 37 Connection rod 40 Fixing hole 41 Insertion hole 42 Abutting portion 42a Inner surface 42b Outer surface 43 Frame support portion 43a Frame pressing surface 44 Projection portion 44a Female screw portion 44b Tip surface 50 Projection 50a Tip surface 50b Caulking part

Claims (5)

A wiper motor comprising a motor body, a speed reduction mechanism that transmits rotation of the motor body to an output shaft, and a gear case that houses the speed reduction mechanism;
A hollow frame member formed extending in the longitudinal direction and to which a motor bracket provided on the gear case is attached;
A pivot holder fixed to the frame member;
A pivot shaft to which a wiper member that is swingably supported by the pivot holder and wipes the wiping surface is attached;
A wiper device having a power transmission member that converts a rotational motion of the output shaft into a swing motion of the pivot shaft,
Motor fixing provided with an insertion hole provided in the frame member and opening to the motor bracket side, a fixing hole formed with a smaller diameter than the insertion hole, and an abutting part formed on an outer peripheral part of the fixing hole And
A protrusion provided on the motor bracket, inserted through the insertion hole, and having a tip end surface in contact with an inner surface of the contact portion or facing a predetermined gap;
A wiper device comprising: a fixing member connected to the projecting portion through the fixing hole, and pressing the motor fixing portion toward the motor bracket at the contact portion.   The wiper device according to claim 1, wherein the fixing member is a screw member fastened to a female screw portion formed in the protruding portion.   The wiper device according to claim 1, wherein the fixing member is a caulking portion integrally formed at a distal end portion of the protruding portion.   4. The wiper device according to claim 1, wherein an outer surface of the contact portion is flat.   5. The wiper device according to claim 1, wherein a plurality of pairs of the insertion holes and the fixing holes that form a pair are formed in the motor fixing portion in a longitudinal direction of the frame body. A wiper device characterized.

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