JP2006264452A - Wiper pivot device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper pivot device capable of surely preventing water from flowing into a fixing part of a base end part of a pivot shaft and one end part of a pivot arm. <P>SOLUTION: The wiper pivot device 10 is equipped with a pivot holder 11 having a drain guide 12, a pivot shaft 15 which is turnably supported on a shaft support part 11a of the pivot holder 11, and has a tip end part 15a projecting from an opening 9a of a vehicle body exterior panel 9 toward the outside, a shaft seal body 20 which seals between the pivot shaft 15 and the pivot holder 11, and between the opening 9a of the vehicle body exterior panel 9 and the pivot holder 11, and a pivot arm 16 where one end part 16a is fixed to the base end part 15b of the pivot shaft 15. The water shutoff ribs 11j, 11k extending to the lower end part 11c of the shaft support part 11a of the pivot holder 11 are projectingly provided on a bottom surface 11i of the pivot holder 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is provided with a drain guide for guiding water flowing from the opening of the vehicle body exterior panel to the drain outlet side in a pivot holder that rotatably supports the pivot shaft, and between the opening of the vehicle body exterior panel and the pivot holder, The present invention relates to a wiper pivot device that seals between pivot holders with a shaft seal body.

  An example of this type of wiper pivot device is shown in FIG. 6 (see, for example, Patent Document 1).

  As shown in FIG. 6, the wiper pivot device 1 is attached to a vehicle body interior panel 8 and is a drain guide that guides water flowing from an opening 9a provided in a cowl top cover 9 that is a vehicle body exterior panel to a drain outlet side. A pivot holder 2 having 2a, and a pivot shaft 3 rotatably supported by a cylindrical shaft support portion 2b of the pivot holder 2 and having a tip portion 3a protruding outward from an opening 9a of the cowl top cover 9. These are inserted into the pivot shaft 3 and attached to the upper end 2c of the pivot holder 2, and are disc-shaped to seal between the pivot shaft 3 and the pivot holder 2 and between the opening 9a of the cowl top cover 9 and the pivot holder 2, respectively. A shaft seal body 4 and a pivot arm 5 having one end 5 a fixed to the base end 3 b of the pivot shaft 3. , And a link end via a ball joint to the other end of the pivot arm 5 is connected the connecting rod (all not shown).

  A cylindrical frame crimping portion 2d is formed on one side of the pivot holder 2. A pipe-like frame 6 is caulked and fixed in the cylindrical frame caulking portion 2d. The other end of the link connecting rod is connected to the output shaft of the wiper motor via a link mechanism. Further, the ball joint portion is a resin which is fitted into a metal ball pin fixed to the other end portion of the pivot arm 5 and a mounting hole provided in one end portion of the link connecting rod and is connected to the ball pin by a spherical pair. It consists of a ball retainer made of steel.

  When the wiper motor is operated, the rotational motion of the output shaft of the wiper motor is converted into the reciprocating rotational motion of the pivot arm 5 by the link mechanism including the link connecting rod, and the pivot shaft 3 is reciprocally rotated, whereby the cowl top cover. The wiper blade attached to the other end of the wiper arm 7 having one end fixed to the tip 3a of the pivot shaft 3 protruding outward from the opening 9a of the windshield 9 wipes rainwater etc. on the wiping surface of the windshield glass. Yes.

JP 2003-226229 A

JP 2004-17894 A

  However, in the conventional wiper pivot device 1, water that has entered from the gap between the opening 9 a of the cowl top cover 9 and the shaft seal body 4 travels through the cylindrical shaft support portion 2 b of the pivot holder 2 when traveling in the rain. By flowing into the lower end portion (base end portion) of the shaft support portion 2b protruding from the bottom surface 2e of the pivot holder 2, it is transmitted to the fastening and fixing portion between the base end portion 3b of the pivot shaft 3 and the one end portion 5a of the pivot arm 5. The fastening and fixing portion is wetted, and the wetted shaft causes rusting on the pivot shaft 3, and as a result, the sliding surfaces in the cylindrical shaft support portion 2 b of the pivot shaft 3 and the pivot holder 2 are abnormally worn. As a result, the pivot shaft 3 becomes unrotatable and the wiper wiping function may be impaired.

  Accordingly, the present invention has been made to solve the above-described problems, and water that has entered from the gap between the vehicle body exterior panel and the shaft seal body during rainy weather travels and the like, and the pivot shaft base end and the pivot arm end. It is an object of the present invention to provide a wiper pivot device that can reliably prevent the fixed portion from flowing into the fixed portion.

  According to the first aspect of the present invention, a pivot holder attached to the vehicle interior panel and having a drain guide for guiding water flowing from the opening of the vehicle body exterior panel to the drain outlet side, and a shaft support portion of the pivot holder are rotatable. And a pivot shaft whose front end protrudes outwardly from the opening of the vehicle body exterior panel, and is inserted into the pivot shaft and attached to the upper end portion of the pivot holder, between the pivot shaft and the pivot holder, and the vehicle body A shaft seal body that seals between the opening of the exterior panel and the pivot holder, a pivot arm having one end fixed to the proximal end portion of the pivot shaft, and a ball joint portion at the other end of the pivot arm A wiper pivot device comprising: a link connecting rod to be coupled; Wherein the the bottom surface of Tohoruda projecting from the water barrier rib extending to a lower end of the shaft supporting portion of the pivot holder.

  As described above, according to the first aspect of the present invention, since the water-impervious rib extending to the lower end of the shaft support portion of the pivot holder projects from the bottom surface of the pivot holder, Water that enters the gap between the shaft seal body and the shaft support portion of the pivot holder to the bottom surface of the pivot holder can be blocked by the water shielding rib. As a result, water can be prevented from flowing into the base end of the pivot shaft and the fixed part of one end of the pivot arm, and the wiping function of the wiper can be improved over time by preventing the pivot shaft from being rusted by water. Can be maintained in a stable state.

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

  1 is a front view showing a wiper pivot device according to an embodiment of the present invention, FIG. 2 is a bottom view of the wiper pivot device, FIG. 3 is a front view of a pivot holder used in the wiper pivot device, and FIG. FIG. 5 is a bottom view of the pivot holder.

  As shown in FIGS. 1 and 2, the wiper pivot device 10 includes a synthetic resin pivot holder 11 attached to a vehicle interior panel 8 and a pivot support 11 rotatably supported by the pivot holder 11. A metal pivot shaft 15 whose front end portion 15a projects outward from the opening 9a of the exterior panel) 9, and is inserted into the pivot shaft 15 and fitted into the upper end portion 11b of the shaft support portion 11a of the pivot holder 11. One end portion 16a is fixed to a shaft seal body 20 made of vinyl chloride that seals between the pivot shaft 15 and the pivot holder 11 and between the opening 9a of the cowl top cover 9 and the pivot holder 11, and a base end portion 15b of the pivot shaft 15. The pivot arm 16 and the other end 16b of the pivot arm 16 And a link connecting rod 18 which is connected via a Yointo portion 17.

  As shown in FIGS. 4 and 5, the shaft support portion 11a of the pivot holder 11 is formed in a cylindrical shape, and a shaft hole 11d for rotatably supporting the metal pivot shaft 15 is inserted into the shaft support portion 11a. It is formed. A vehicle body attachment portion 11 f that is screwed to the vehicle body interior panel 8 is integrally formed on one side portion 11 e of the pivot holder 11. Further, as shown in FIGS. 1 to 5, the other side portion 11 e ′ of the pivot holder 11 is integrally formed with a cylindrical frame crimping portion 11 g so as to extend laterally. A pipe-shaped frame 19 connected to a gear case that houses a reduction gear driven by a wiper motor (not shown) is caulked and fixed to the frame caulking portion 11g.

  As shown in FIGS. 1, 3 and 4, the upper surface 11h of the pivot holder 11 is provided with a dish-shaped drain guide 12 for guiding water flowing from the opening 9a of the cowl top cover 9 to a drain outlet (not shown). Integrally protruding. Further, as shown in FIG. 2, the ball joint portion 17 has a metal ball pin 17 a fixed to the other end portion 16 b of the pivot arm 16 and an attachment hole 18 b provided in the one end portion 18 a of the link connecting rod 18. A resin ball retainer (not shown) that is fitted and connected to the ball pin 17a by a spherical pair is configured. Further, the shaft seal body 20 is formed in a disc shape, and the center portion thereof is fitted into the distal end portion 15a of the pivot shaft 15 and the upper end portion 11b of the shaft support portion 11a of the pivot holder 11 without any gap by press-fitting.

  Further, as shown in FIGS. 1, 2 and 5, the front and rear edges of the bottom surface 11i of the pivot holder 11 substantially surround the shaft support portion 11a of the pivot holder 11 and extend to the lower end portion 11c of the shaft support portion 11a. A pair of front and rear water-impervious ribs 11j and 11k that extend is integrally formed. The front-side water-impervious rib 11j is positioned below the shaft seal body 20 and has a rectangular plate-like portion formed continuously on both sides of the curved portion. Further, the rear water-impervious rib 11k is located below the drain guide 12 and is formed in a rectangular plate shape.

  As shown in FIG. 1, the wiper arm 30 is fitted to the serration portion 15c of the distal end portion 15a of the pivot shaft 15 and is fixed via a nut 31 screwed to the male screw portion 15d. At the same time, one end 16a of the pivot arm 16 constituting a part of a link mechanism for converting the rotational motion of a wiper motor (not shown) into the swing motion of the pivot shaft 15 is fixed to the base end portion 15b of the pivot shaft 15 by caulking. Has been. In addition, the ball joint portion 17 positioned on the upper side of the other end portion 16b of the pivot arm 16 in the drawing is connected to the pivot arm of another wiper pivot device (not shown) via a link connecting rod 18.

  According to the wiper pivot device 10 of the above embodiment, when a wiper motor (not shown) is operated, the rotational motion of the output shaft of the wiper motor is converted into the reciprocating rotational motion of the pivot arm 16 by the link mechanism including the link connecting rod 18. By reciprocatingly rotating 15, a winder blade (not shown) is attached to the other end of the wiper arm 30 having one end fixed to the distal end portion 15 a of the pivot shaft 15 protruding outward from the opening 9 a of the cowl top cover 9. Wipe away the rainwater etc. on the wiping surface of the shield glass.

  The water that enters the gap between the cowl top cover 9 and the shaft seal body 20 and travels from the cylindrical shaft support portion 11a of the pivot holder 11 to the bottom surface 11i of the pivot holder 11 when traveling in the rain, etc. The pair of front and rear water shielding ribs 11j and 11k that substantially surround the shaft support portion 11a of the pivot holder 11 and extend to the lower end portion 11c of the shaft support portion 11a do not flow down and are transmitted to the bottom surface 11i of the pivot holder 11.

  That is, the water that enters the gap between the cowl top cover 9 and the shaft seal body 20 and is transmitted from the cylindrical shaft support portion 11a of the pivot holder 11 to the bottom surface 11i of the pivot holder 11 is a pair of front and rear impermeable ribs 11j, The water is surely shielded by 11k. Accordingly, it is possible to prevent water from flowing into the fastening and fixing portion of the base end portion 15b of the pivot shaft 15 and the one end portion 16a of the pivot arm 16, and it is possible to prevent rusting of the pivot shaft 15 due to water. . As a result, the shaft hole 11d of the cylindrical shaft support portion 11a of the pivot shaft 15 and the pivot holder 11 does not wear abnormally, and the wiper wiping function can be maintained in a good state over time.

  Similarly, it is possible to prevent water from flowing into the ball joint portion 17 and to prevent the ball joint portion 17 from being damaged by water, so that the wiping function of the wiper can be maintained in a good state over time.

  Furthermore, a pair of front and rear water shielding ribs 11j and 11k that substantially surround the shaft support portion 11a of the pivot holder 11 and extend to the lower end portion 11c of the shaft support portion 11a are integrally formed at the front and rear edge portions of the bottom surface 11i of the pivot holder 11. Therefore, since it is possible to reliably prevent the water from flowing into the fastening and fixing portion of the base end portion 15b of the pivot shaft 15 and the one end portion 16a of the pivot arm 16, no additional parts are required. Cost reduction can be achieved.

  According to the embodiment, the pair of front and rear water shielding ribs 11j that substantially surround the shaft support portion 11a of the pivot holder 11 at the front and rear edges of the bottom surface 11i of the pivot holder 11 and extend to the lower end portion 11c of the shaft support portion 11a. , 11k are integrally formed to project, but an annular water blocking rib may be integrally formed on the bottom surface 11i of the pivot holder 11 so as to completely cover the periphery of the shaft support portion 11a.

It is a front view which shows the wiper pivot apparatus of one Embodiment of this invention. It is a bottom view of the wiper pivot device. It is a front view of the pivot holder used for the said wiper pivot apparatus. It is a top view of the said pivot holder. It is a bottom view of the pivot holder. It is a front view of the conventional wiper pivot apparatus.

Explanation of symbols

8 Car body interior panel 9 Cowl top cover (car body exterior panel)
9a opening 10 wiper pivot device 11 pivot holder 11a shaft support 11b upper end 11c lower end 11i bottom 11j, 11k water blocking rib 12 drain guide 15 pivot shaft 15a distal end 15b base end 16 pivot arm 16a one end 16b other end 17 Ball joint 18 Link connecting rod 20 Shaft seal body

Claims (1)

A pivot holder attached to the vehicle interior panel and having a drain guide for guiding the water flowing in from the opening of the vehicle exterior panel to the drain outlet side, and is pivotally supported by the shaft support portion of the pivot holder, the vehicle exterior A pivot shaft whose front end projects outwardly from the opening of the panel, and is inserted into the pivot shaft and attached to the upper end of the pivot holder. Between the pivot shaft and the pivot holder and between the opening of the vehicle body exterior panel and the pivot A shaft seal body that seals between the holders, a pivot arm having one end fixed to the base end of the pivot shaft, and a link connecting rod connected to the other end of the pivot arm via a ball joint; In a wiper pivot device with
A wiper pivot device characterized in that a water-impervious rib extending to the lower end portion of the shaft support portion of the pivot holder projects from the bottom surface of the pivot holder.

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