JP3998068B2 - Wiper pivot device - Google Patents

Description

  The present invention relates to a wiper pivot device that wipes a wiper by the power of a wiper motor, and in particular, a wiper that is provided with a bowl-shaped seal body that seals between an opening formed in an exterior panel of a vehicle body and a pivot holder. The present invention relates to a wiper pivot device that includes a seal body in a pivot device and can effectively prevent deformation due to a high water pressure load such as a shower test.

  2. Description of the Related Art Conventionally, a wiper pivot device that wipes and wipes a wiper by the power of a wiper motor has a pivot holder screwed to an interior panel of a vehicle body, and a pivot shaft is inserted into a shaft hole formed in the pivot holder. One end portion of a pivot arm constituting a wiper link is connected to a base end portion of the pivot shaft located below. The pivot shaft is attached so as to protrude from the peripheral edge of the opening formed in the cowl top cover, which is an exterior panel of the vehicle body, and one end portion of the wiper arm is fixed to the tip portion of the pivot shaft. Also, a pivot arm is connected to the base end portion of the pivot shaft, a link joint portion is formed at the other end of the pivot arm, and one end portion of the link connecting rod is rotatably connected to the link joint portion. A motor arm coupled to the output shaft of the wiper motor is rotatably connected to the other end of the link connecting rod.

  In the conventional wiper pivot device configured as described above, a seal body that elastically contacts the peripheral edge of the opening formed in the cowl top cover is fixed to the upper portion of the holder body of the pivot holder, and flows from the opening. There is also known a configuration configured to prevent rainwater, washing water, and the like from flowing into the air intake portion.

Japanese Utility Model Publication No. 4-24860

  However, the conventional wiper pivot device to which the seal body is mounted has a structure in which the seal body is simply fixed to the pivot holder main body. For example, heavy rain or high pressure is applied to the seal body. When a high water pressure is applied, such as during a car wash or shower test, the seal body is deformed and a large amount of water flows into the air intake side, and this flowing water may be sucked into the air conditioner. The water that has flowed in has a problem that it is scattered in the wiper direction.

  The present invention was devised in view of the current situation, and the object of the invention is to supply water to the air conditioner even under heavy rain, high pressure car wash or high pressure water such as shower test. It is an object of the present invention to provide a wiper pivot device that can reduce or prevent suction and water splash on the wiper with a simple configuration without increasing the number of parts.

The invention of claim 1 includes a pivot holder mount piece interior panels of the car body is fixed, and the pivot shaft is rotatably supported by the pivot holder, one end portion to the proximal end of the pivot shaft fixed, and the pivot arm the other end is connected to the wiper motor via a link mechanism, wherein mounted on the upper end of the pivot shaft supporting the body of the pivot holder, elastic contact with the peripheral edge of the opening of the outer panel of the vehicle body A wiper pivot device comprising a flange-shaped seal body made of an elastic material that seals between an upper end portion of the pivot shaft support body and an opening of the exterior panel of the vehicle body, wherein the collar-shaped seal body is the pivot projecting from the shaft is supported by a plurality of sealing body support projections underpinning the seal body, the impact setting positions of the seal body support protrusions, the vehicle body exterior Pas Characterized in that it is arranged between the opening and the pivot shaft support barrel Le.

One end of the invention of claim 2, the pivot holder mount piece interior panels of the car body is fixed, and the pivot shaft is rotatably supported by the pivot holder, the proximal end portion of the pivot shaft parts are fixed, a pivot arm the other end is connected to the wiper motor via a link mechanism, wherein mounted on the upper end of the pivot shaft supporting the body of the pivot holder, the peripheral edge of the opening of the vehicle body outer panel A flange-shaped sealing body made of an elastic material that elastically seals between the upper end of the pivot shaft support body and the opening of the exterior panel of the vehicle body, and a drain guide integrally formed with the pivot holder. in the wiper pivot device, a plurality of the seal member support protrusion that protrudes toward the direction of the flange-like seal member is formed integrally with the pivot holder The flange-like seal member is characterized by being supported by the plurality of sealing body support protrusions.

Further, the invention according to claim 3 is the wiper pivot device according to claim 1 or 2 , wherein a boss portion is integrally formed at a central portion of the bowl-shaped seal body , and a lower surface of the seal body. to, characterized in that a plurality of reinforcing ribs projecting radially radially over the collar-shaped peripheral portion from the outer peripheral edge abuts each of the the upper surface of the seal body support projection of the boss portion is formed And

  As described above, in the wiper pivot device according to the present invention, even when heavy rain, high-pressure car washing or high water pressure such as a shower test is applied, water is sucked into the air conditioner or water is poured onto the wiper. It is possible to relieve or prevent the problem with a simple configuration without increasing the number of parts.

  Hereinafter, the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

  1 to 4 show a wiper pivot device A according to an embodiment of the present invention. The wiper pivot device A includes a pivot holder 1 fixed to an interior panel of a vehicle body (not shown), A pivot shaft 2 rotatably supported by the pivot holder 1 and a pivot arm having one end fixed to the base end of the pivot shaft 2 and the other end connected to a wiper motor via a link mechanism (not shown) 3.

  A hook-like seal body 6 that elastically contacts the peripheral edge of the opening 5 formed in the cowl top cover 4 that is an exterior panel of the vehicle body is mounted on the upper portion of the pivot shaft support body 1A of the pivot holder 1. Has been.

  The seal body 6 is made of an elastic material such as a soft synthetic resin material or a rubber material, and is formed in a disk shape. The diameter L1 of the seal body 6 is the diameter of the opening 5 as shown in FIG. It is formed larger than the dimension L2.

  A boss portion 6B extending outward from the upper surface and the lower surface is integrally formed at the center portion of the disc-shaped seal body 6. The boss portion 6B is fitted to a first insertion hole (not shown) through which the pivot shaft 2 is inserted and an outer periphery of the upper end portion of the pivot shaft support body portion 1A having a larger inner diameter than the first insertion hole. A second insertion hole (not shown) is provided in a stepwise manner in the vertical direction of the boss portion 6B. The inner diameter dimension of the second insertion hole is set to be smaller than the outer diameter dimension of the pivot shaft support body portion 1A, and the upper end of the pivot shaft support body portion 1A is elastically deformed by elastically deforming the boss portion 6B having elasticity. The seal body 6 is attached to the pivot holder by press-fitting the second insertion hole into the outer periphery of the part. Here, since the inner diameter dimension of the first insertion hole is set slightly smaller than the outer diameter dimension of the pivot shaft 2, the outer peripheral surface of the pivot shaft 2 and the peripheral surface of the first insertion hole are rotated. Is in a close fitting state, and the space between the pivot shaft 2 and the pivot shaft support body 1A is sealed. Even if the pivot shaft 2 rotates and sliding friction occurs between the pivot shaft 2 and the first insertion hole, the second insertion hole is press-fitted into the pivot shaft support body 1A. No relative movement in the circumferential direction between the portion 1A and the seal body 6 occurs. Further, reinforcing ribs 6A projecting radially from the outer peripheral edge of the boss 6B to the flange-shaped peripheral edge in the radial direction are provided on the lower surface of the flange-shaped sealing body 6 at a predetermined interval in the circumferential direction. A plurality (four in the illustrated embodiment) are integrally formed.

  The pivot holder 1 has a plurality of (four in the illustrated embodiment) seal body supporting projections 7, 7, 7, 7 that support the seal body 6 in the direction of the seal body 6. The plurality of reinforcing ribs 6A, 6A, 6A, 6A are integrally projected at required intervals along the circumferential direction so as to face each other.

  As is apparent from FIGS. 3 and 4, the projecting positions of the seal body support protrusions 7, 7, 7, 7 are set between the opening 5 and the pivot shaft support body 1 </ b> A of the pivot holder 1. Thus, even if a high water pressure acts on the seal body 6, the peripheral edge of the seal body 6 is prevented from being deformed to the minimum.

  Here, the seal body 6 is attached to the pivot holder 1 by press-fitting a second insertion hole formed in the boss portion 6B of the seal body 6 on the outer periphery of the upper end portion of the pivot shaft support body 1A. Made. At this time, press-fitting is performed by determining the circumferential position of the seal body 6 so that the reinforcing ribs 6A of the seal body 6 are in contact with the upper surfaces of the seal body support protrusions 7, respectively.

  In FIG. 1 to FIG. 3, reference numeral 15 denotes an attachment piece extending to the side of the pivot holder 1, and the attachment piece 15 is fixed to an interior panel of a vehicle body (not shown). At this time, the serration forming portion 13 and the wiper arm mounting portion 10 which are the distal end portion of the pivot shaft 2, the upper end portion of the pivot shaft support body portion 1A of the pivot holder 1 and the upper end portion of the pivot shaft support body portion 1A are press-fitted and fitted. Each dimension is determined so that the upper end portion of the boss portion 6B of the seal body 6 protrudes upward through the opening 5 of the cowl top cover (exterior panel) 4 of the vehicle body. Further, when the mounting piece 15 is fixed to the interior panel of the vehicle body, the peripheral edge of the upper surface of the seal body 6 is in elastic contact with the lower surface of the peripheral edge of the opening 5 of the cowl top cover 4, and each reinforcing rib 6A is The vertical dimension of each seal body support protrusion 7 is determined so as to elastically contact the upper surface of the seal body support protrusion 7. Further, a drain guide 16 is formed integrally with the pivot holder 1.

  By the way, the pivot shaft 2 is formed at a round rod-shaped pivot shaft main body 8, a pivot arm coupling portion 9 formed at the base end portion of the pivot shaft main body 8, and a distal end portion of the pivot shaft main body 8. And a wiper arm mounting portion 10. The pivot arm coupling portion 9 is fixed with a pivot shaft coupling portion 12 formed at the base end portion of the pivot arm 3 by caulking. In the figure, reference numeral 13 denotes a serration forming unit. Although not shown, the wiper arm mounting portion 10 is inserted with the arm head of the wiper arm, the serration forming portion 13 is secured to the arm head, and a nut is screwed into the male screw formed on the wiper arm mounting portion 10. Thus, the arm head is fixed to the pivot shaft 2.

  Further, the tip of the pivot arm 3 is connected to one end of a link mechanism (not shown), and a wiper motor serving as a drive source is connected to the other end of the link mechanism. Therefore, when the wiper motor rotates, the pivot arm 3 is configured to reciprocate through the link mechanism.

  Therefore, in the wiper pivot device A according to this embodiment, the upper peripheral edge portion of the seal body 6 is located on the lower peripheral edge surface of the opening 5 of the cowl top cover 4 in a state where no water pressure acts on the seal body 6. Since it is elastically contacted, the opening 5 is concealed, the appearance quality around the cowl top cover 4 is good, and the sealing body 6 does not deform so much even if normal water pressure acts, so that the waterproof performance is maintained. can do.

  Further, in the wiper pivot device A according to this embodiment, when high water pressure is applied to the seal body 6 from the cowl top cover 4 side during heavy rain, high pressure car wash or shower test, the above seal body Since the 6D range portion of the outer peripheral edge portion 6 is only elastically deformed with the seal body support protrusions 7, 7, 7, 7 as fulcrums, it causes water to be sucked into the air conditioner and water to the wiper. It is possible to effectively prevent water from flowing in.

  Furthermore, in the wiper pivot device A according to this embodiment, the seal body supporting projections 7, 7, 7, 7 for supporting the seal body 6 are configured to project integrally with the pivot holder 1, It is not necessary to prepare a separate component for supporting the seal body 6, and as a result, the above-described operation / effect can be obtained without increasing the number of components.

1 is a perspective view showing a configuration of a wiper pivot device according to an embodiment of the present invention. It is a top view of the wiper pivot device. It is a front view of the wiper pivot device. It is sectional drawing of the wiper pivot apparatus. It is a top view of the pivot holder.

Explanation of symbols

A Wiper pivot device 1 Pivot holder 1A Pivot shaft support body 2 Pivot shaft 3 Pivot arm 4 Cowl top cover (car body exterior panel)
5 Opening 6 Sealing Body 6A Reinforcing Rib 6B Boss 7 Sealing Body Supporting Projection 15 Mounting Piece 16 Drain Guide

Claims (3)

A pivot holder mounting piece portion is fixed to the interior panel of the vehicle body,
A pivot shaft rotatably supported by the pivot holder;
A pivot arm having one end fixed to the base end of the pivot shaft and the other end connected to a wiper motor via a link mechanism;
Wherein mounted on the upper end of the pivot shaft supporting the body of the pivot holder, elastic contact with the peripheral edge of the opening of the outer panel of the vehicle body seal between the opening of the outer panel of the vehicle body and the upper end portion of the pivot shaft supporting the barrel In a wiper pivot device provided with a bowl-shaped seal body made of an elastic material that
The flange-like seal body, said protruding from the pivot shaft is supported by a plurality of sealing body support projections underpinning the seal body, the impact setting positions of the seal body support protrusions, the vehicle body outer panel The wiper pivot device is disposed between the opening of the pivot shaft and the pivot shaft support body. A pivot holder mounting piece portion is fixed to the interior panel of the vehicle body,
A pivot shaft rotatably supported by the pivot holder;
A pivot arm having one end fixed to the base end of the pivot shaft and the other end connected to a wiper motor via a link mechanism;
Mounted on the upper end of the pivot shaft support body of the pivot holder and elastically contacts the peripheral edge of the opening of the exterior panel of the vehicle body to seal between the upper end of the pivot shaft support body and the opening of the exterior panel of the vehicle body A bowl-shaped sealing body made of elastic material,
In a wiper pivot device comprising a drain guide formed integrally with the pivot holder,
A plurality of seal body support protrusions projecting in the direction of the bowl-shaped seal body are formed integrally with the pivot holder,
The wiper pivot device according to claim 1, wherein the flange-shaped seal body is supported by the plurality of seal body support protrusions. A boss part is integrally formed at the center of the bowl-shaped seal body , and the bottom surface of the seal body projects radially from the outer peripheral edge of the boss part to the flange-like peripheral part. wiper pivot unit according to claim 1 or claim 2, characterized in that a plurality of reinforcing ribs is in contact respectively the the upper surface of the sealing member support protrusion is formed.

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