JP2006297969A - Wiper pivot - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper pivot which can prevent or effectively reduce a connection section between a pivot lever and a link mechanism from being flooded with water, and in addition, can prevent or effectively reduce foreign matter from entering a pivot hole. <P>SOLUTION: In this wiper pivot 10, when a foreign subject such as a dead leaf is about to drop from the pivot hole 38, a radial rib 68 which is extended from the outer peripheral section of the holder body 32 of a pivot holder 14 interferes with the foreign subject from the lower side, and supports the foreign matter from the lower side. Thus, the dropping of foreign matter from the pivot hole 38 can be prevented or effectively suppressed from occurring. In addition, the radial rib 68 is formed on the holder body 32, i.e., the pivot holder 14, and the number of parts is not increased, and the assembling manhours for the parts are not increased as well. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiper pivot constituting a wiper device for wiping a windshield glass or the like of a vehicle.

  A wiper device mounted on a vehicle is pivotally supported by a pivot holder that constitutes a wiper pivot, and is wiped through a wiper arm on a distal end side that penetrates a pivot hole formed in a cowl top panel of the vehicle. The blades are mechanically connected.

  When the driving force of the motor is transmitted to the pivot shaft, when the pivot shaft reciprocates around its own axis, the blade rubber provided on the wiper blade reciprocates on the surface to be wiped such as the windshield glass of the vehicle. And wipe the surface to be wiped.

  On the other hand, foreign matter such as dead leaves may enter from the pivot hole, and foreign matter that has entered from the pivot hole may rot on the cowl panel. In the vicinity of the cowl panel, an air inlet of the vehicle air conditioner is provided, and when a foreign object rots in the vicinity of the air intake as described above, a strange odor is taken into the vehicle interior and the vehicle occupant May be uncomfortable.

Therefore, in the technique disclosed in Patent Document 1 below, the pivot holder is provided with a waterproof cap for preventing rainwater or the like from entering between the pivot holder and the pivot shaft, and the pivot cap is pivoted on the pivot hole side of the waterproof cap. A plate for preventing entry of foreign matter is provided on the shaft.
JP-A-11-301419

  However, in addition to the waterproof cap as disclosed in Patent Document 1, by attaching a foreign object intrusion prevention plate as a separate part, the number of parts increases, the part cost increases, and the assembly process of parts There is a problem that increases.

  An object of the present invention is to obtain a wiper pivot that can prevent or effectively reduce the intrusion of foreign matter from a pivot hole without increasing the number of parts in consideration of the above facts.

  In the wiper pivot according to the first aspect of the present invention, a wiper arm is fixed to a distal end side that penetrates a pivot hole formed in a panel member constituting the vehicle body from the inside of the vehicle body and protrudes to the front side of the panel member. A pivot shaft, and a cylindrical holder body rotatably supporting the pivot shaft, a pivot holder fixed to the vehicle body, one end fixed to the pivot shaft, and a drive means A connecting portion of a link member that swings in response to a driving force is connected to the other end to transmit the swing of the link member to the pivot shaft, and close to the pivot hole on the back side of the panel member A plurality of radial ribs arranged and radially extending from the outer peripheral portion of the holder main body.

  According to the wiper pivot according to the first aspect of the present invention, foreign matter such as dead leaves that fall on the surface of the panel member may enter from the pivot hole. However, in the wiper pivot according to the present invention, the panel member is arranged in close proximity to the pivot hole on the back side of the panel member, and radial ribs extend radially from the outer peripheral portion of the holder body. For this reason, the foreign matter about to fall from the pivot hole interferes with the upper end portion of the radial rib (that is, the end portion of the radial rib on the pivot hole side), and the foreign matter is prevented from entering the pivot hole.

  Thereby, it can prevent or suppress effectively that the foreign material which fell from the pivot hole accumulates in the back surface side of a panel member, ie, the inside of a vehicle body.

  In addition, in the wiper pivot according to the present invention, the structure for preventing or suppressing the fall of the foreign matter from the pivot hole, that is, the radial ribs are formed in the holder body of the pivot holder. The number of parts and the number of assembling steps can be reduced as compared with the case where the structure for preventing foreign material intrusion is configured as a part separate from the pivot holder. Moreover, since the position of the radial rib with respect to the pivot hole is determined by fixing the pivot holder to the vehicle body, it can be positioned very close to the pivot hole.

  A wiper pivot according to a second aspect of the present invention is the wiper pivot according to the first aspect of the present invention, wherein the distal end portion of the radial rib has a larger outer diameter than the inner diameter of the pivot hole. It is characterized by that.

  In the wiper pivot according to the second aspect of the present invention, the pivot hole side tip portion of the radial rib has an outer diameter dimension larger than the inner diameter dimension of the pivot hole. Radial ribs exist on the entire radial direction of the hole, and the radial ribs more reliably interfere with foreign matter to prevent intrusion.

  A wiper pivot according to a third aspect of the present invention is the wiper pivot according to the first or second aspect, wherein the upper end side in the axial direction of the holder body passes through the pivot hole and is on the surface side of the panel member. The holder main body is protruded.

  In the wiper pivot according to the third aspect of the present invention, since the upper end side in the axial direction of the holder body passes through the pivot hole, the end portion on the pivot hole side of the radial rib extending from the outer peripheral portion of the holder body is the pivot hole. Can be approached.

  As described above, the radial rib is provided close to the pivot hole, so that the radial rib immediately interferes with a foreign substance that is about to fall from the pivot hole. In addition, the gap between the pivot hole and the holder main body is reduced, and the possibility of foreign matter entering from this gap is also reduced.

  A wiper pivot according to a fourth aspect of the present invention is the wiper pivot according to any one of the first to third aspects, wherein the central axes of the holder body and the pivot shaft are inclined with respect to the vertical direction. In addition, a plurality of the radial ribs are formed on the lower side in the inclination direction of the central axis.

  In the wiper pivot according to the fourth aspect of the present invention, the central axes of the holder body and the pivot shaft are inclined with respect to the vertical direction.

  Here, in the wiper pivot according to the present invention, the plurality of radial ribs are formed on the lower side in the inclination direction of the central axis. For this reason, rainwater that has passed through the pivot hole is drained without collecting between the radial ribs adjacent to each other around the central axis.

  A wiper pivot according to a fifth aspect of the present invention is the wiper pivot according to any one of the first to fourth aspects, wherein the wiper pivot is below the radial rib along the central axis of the holder body. A plate-like collar portion is extended in the radial direction from the outer peripheral portion of the holder main body.

  According to the wiper pivot according to the fifth aspect of the present invention, the plate-shaped flange portion extends radially from the outer peripheral portion of the holder main body on the lower side of the radial rib along the central axis of the holder main body. . For this reason, when the rainwater flowing down through the radial ribs reaches the heel part, it further flows on the heel part and falls from a predetermined outer peripheral part of the heel part. Thereby, rainwater can be kept away with respect to the electrical component etc. which are arrange | positioned rather than the collar part.

  A wiper pivot according to a sixth aspect of the present invention is the wiper pivot according to the fifth aspect of the present invention, wherein the wiper pivot is directed outwardly in the axial direction of the holder body outside the radial rib along the radial direction of the holder body. In addition, a peripheral wall is erected from the flange portion, and a drainage portion is formed on the peripheral wall that allows water flowing down inside the peripheral wall of the flange portion to pass to the outside of the peripheral wall.

  According to the wiper pivot according to the sixth aspect of the present invention, the peripheral wall is erected on the flange portion outside the radiation rib along the radial direction of the holder body. For this reason, rainwater flows inside the peripheral wall of the collar, and is drained from the drainage part formed on the peripheral wall to the outside of the peripheral wall.

  Thus, in the wiper pivot according to the present invention, rainwater can be drained only from a specific drainage portion, and water exposure to other parts around the pivot holder can be prevented or effectively suppressed.

<Configuration of the present embodiment>
FIG. 1 is a cross-sectional view showing a configuration of a main part of a vehicle 12 to which a wiper pivot 10 according to an embodiment of the present invention is applied.

  In FIG. 1, the arrow UP direction indicates the vehicle upper side (vertically upward) when the vehicle 12 is placed on the horizontal plane, and the arrow DW direction indicates the vehicle lower side (vertically downward) when the vehicle 12 is placed on the horizontal plane. Show. An arrow LE direction indicates a horizontal direction when the vehicle 12 is placed on a horizontal plane.

  As shown in FIG. 1, the wiper pivot 10 includes a pivot holder 14. The pivot holder 14 is formed by die-casting a zinc alloy or a magnesium alloy as a whole.

  As shown in FIGS. 2 and 3, the pivot holder 14 includes a fixed piece 16. The fixed piece 16 is disposed between a vehicle panel 18 constituting the vehicle body on the surface side of the vehicle 12 and a cowl panel 20 constituting the vehicle body below the vehicle panel 18. As shown in FIG. 3, the fixing piece 16 is bent at a substantially right angle around an axis whose axial direction is the thickness direction at an intermediate portion in the longitudinal direction, and is bent at a plurality of predetermined locations in the longitudinal direction. ing.

  A through hole 22 is formed on the distal end side of the fixed piece 16 in the longitudinal direction, and a notch 24 opened at the outer peripheral portion is formed in the middle portion in the longitudinal direction. A fixing tool 28 that penetrates the through holes 22 and the notches 24 in the thickness direction of the fixing piece 16 is fixed through the through holes (not shown) formed in the cowl panel 20 so that the fixing piece 16 is attached to the cowl panel. 20 is fixed. A holder main body 32 of the pivot holder 14 is formed at the other end of the fixed piece 16.

  The holder main body 32 is formed in a substantially cylindrical shape, and its axial direction (the direction along the one-dot chain line L in FIG. 1) is the vehicle in the vertical direction of the vehicle 12 (the arrow UP direction and the arrow DW direction in FIG. Is inclined by a predetermined angle θ. The pivot holder 14 has an upper end in the axial direction passing through a pivot hole 38 formed in the vehicle panel 18 and projecting toward the surface of the vehicle panel 18.

  A pivot shaft 36 is inserted through the holder body 32, and the pivot shaft 36 is rotatably supported by the holder body 32 around the central axis of the holder body 32.

  The pivot shaft 36 has a distal end projecting from the upper end of the holder body 32. The longitudinal base end side of the wiper arm 40 is fixed to the distal end of the pivot shaft 36 protruding from the upper end of the holder body 32.

  A wiper blade (both not shown) is mechanically connected to the distal end side of the wiper arm 40. When the wiper arm 40 rotates together with the pivot shaft 36, a blade rubber provided on the wiper blade serves as a surface to be wiped. It rotates on the glass surface of the windshield glass 44 and wipes the glass surface of the windshield glass 44.

  On the other hand, the lower end portion of the pivot shaft 36 protrudes from the lower end portion of the holder body 32, and one end of a pivot lever 46 is integrally fixed to the lower end portion of the pivot shaft 36.

  A connecting pin 48 constituting a connecting portion is provided on one surface (lower surface) in the thickness direction of the pivot lever 46 on the other end side of the pivot lever 46. A ball bearing 50 is rotatably mounted on the connecting pin 48. One end of a link member 51 constituting a wiper device is connected to the ball bearing 50 together with the wiper pivot 10.

  Further, a connecting pin 52 constituting a connecting portion is provided on the other surface (upper surface) in the thickness direction of the pivot lever 46 on the distal end side of the pivot lever 46. A ball bearing 54 is rotatably mounted on the connecting pin 52. One end of a link member 55 constituting the wiper device is connected to the ball bearing 54 together with the wiper pivot 10.

  Either one of the link members 51 and 55 is mechanically coupled directly or indirectly to a wiper motor (not shown) as a driving means, and any one of the link members 51 and 55 is swung by the driving force of the wiper motor. Then, this swing is transmitted to the distal end side of the pivot lever 46, the pivot lever 46 swings around the axis of the pivot shaft 36, and the pivot shaft 36 reciprocates.

  On the other hand, a flange portion 60 extends from the outer peripheral portion in the axially intermediate portion of the holder main body 32 toward the radially outer side of the holder main body 32. The flange portion 60 has a thickness direction substantially along the axial direction of the holder main body 32, and a peripheral wall 62 is erected from the outer peripheral edge toward the upper end side in the axial direction of the holder main body 32.

  The peripheral wall 62 is formed in an annular shape. A drainage gate 64 as a drainage part is formed at a predetermined position of the peripheral wall 62. The drain gate 64 is located at a position different from the extending direction of the pivot lever 46 from the pivot shaft 36 in the radial direction centered on the axis L of the holder body 32 and out of the outer peripheral edge of the inclined flange portion 60. It is provided at the lowest position (arrow DW direction side in FIG. 1). In the portion where the drain gate 64 is formed, the peripheral wall 62 is not continuous, and the inside and outside of the peripheral wall 62 communicate with each other through the drain gate 64.

  Further, an arc-shaped rib 66 is erected from the flange portion 60 on the opposite side of the drainage gate 64 through the central axis L of the holder body 32 inside the peripheral wall 62. The arc-shaped rib 66 is curved toward the holder body 32 with the center axis L of the holder body 32 as the center of curvature, and the upper end of the arc-shaped rib 66 reaches the vicinity of the back surface of the vehicle panel 18.

  On the other hand, on the side opposite to the arc-shaped rib 66 (that is, the drainage gate 64 side) via the central axis L of the holder main body 32, a predetermined angle around the central axis L of the holder main body 32 (this embodiment). (In this embodiment, a plurality of radial ribs 68) are erected from the flange 60, and the upper ends of these radial ribs 68 are close to the back surface of the vehicle panel 18. . These radial ribs 68 are formed so as to extend from the outer peripheral portion of the holder body 32 toward the outer side in the radial direction of the holder body 32 around the central axis L of the holder body 32.

  The outer ends of the radial ribs 68 along the radial direction of the holder main body 32 are arranged on the concentric circles S1 such that the outer diameter D2 is larger than the inner diameter D1 of the pivot hole 38. Is formed. For this reason, the outer side of the intermediate portion of each radial rib 68 along the radial direction of the holder main body 32 is located on the outer side of the pivot hole 38 in the radial direction.

<Operation and effect of the present embodiment>
Next, the operation and effect of the present embodiment will be described.

  For example, when the wiper motor is operated in rainy weather or the like, as described above, of the link members 51 and 55 connected to the ball bearings 50 and 54, the one connected to the wiper motor swings. When the swing of one of the link members 51 and 55 is transmitted to the distal end side of the pivot lever 46, the pivot lever 46 swings around the axis of the pivot shaft 36, and the pivot shaft 36 reciprocates.

  As the pivot shaft 36 reciprocates, the wiper arm 40 connected to the tip of the pivot shaft 36 reciprocates, and the wiper blade connected to the wiper arm 40 reciprocates on the glass surface of the windshield glass 44. Move.

  As described above, the wiper blade reciprocally rotates on the glass surface of the windshield glass 44, so that the glass of the windshield glass 44 is provided by the blade rubber provided on the wiper blade and pressed against the glass surface of the windshield glass 44. The surface is wiped away.

  On the other hand, not only rain water but also foreign matter such as dead leaves may fall on the vehicle panel 18, and thus the foreign matter on the vehicle panel 18 moves over the vehicle panel 18 as indicated by an arrow A in FIG. When it slides down, it reaches the pivot hole 38. When the foreign matter that has reached the pivot hole 38 attempts to fall through the pivot hole 38, the foreign matter interferes with the upper end of the radial rib 68 from below, and the foreign matter is prevented from entering the pivot hole 36. Thereby, it can prevent or reduce very effectively that a foreign material falls to the back surface side of the vehicle panel 18. FIG.

  Further, as described above, rainwater falls from the pivot hole 38 during rainy weather. The fallen rainwater passes between the radial ribs 68 or descends through the radial ribs 68 and the outer peripheral portion of the holder main body 32, and further through the arc-shaped ribs 66, and reaches the collar 60. It flows down on the buttocks 60.

  Here, the drain gate 64 is the lowermost (outside edge) of the outer peripheral edge of the flange portion 60 inclined to the front side of the vehicle with respect to the vertical direction of the vehicle 12 (the arrow UP direction and the arrow DW direction in FIG. 1). It is provided at a position on the arrow DW direction side in FIG. For this reason, the rainwater flowing down on the heel part 60 goes to the drainage gate 64, passes through the drainage gate 64, and is drained to the outside of the heel part 60.

  Further, here, the drain gate 64 is formed at a position different from the extending direction of the pivot lever 46. For this reason, it is possible to prevent rainwater flowing out from the drainage gate 64 from being wetted by the connecting pins 48 and 52 which are connecting portions between the pivot lever 46 and the link members 51 and 55. For this reason, when the connecting pins 48 and 52 are exposed to rain water, the lubricating oil applied around the connecting pins 48 and 52 flows out, and the connecting portions with the link members 51 and 55 wear out. Is prevented.

  Here, in the present embodiment, the structure for preventing the intrusion of foreign matter from the pivot hole 38 as described above, and the structure for preventing rainwater from getting wet on the connecting pins 48 and 52 are as described above. It is formed integrally with the holder main body 32. Therefore, such a structure for preventing foreign matter from entering from the pivot hole 38 and a structure for preventing rainwater from getting wet on the connecting pins 48 and 52 are used when the pivot holder 14 is formed. And the fixed piece 16.

  As a result, the structure for preventing the entry of foreign matter from the pivot hole 38 and the structure for preventing rainwater from getting wet on the connecting pins 48 and 52 are compared with the case where the structure is separate from the pivot holder 14. The number of parts can be reduced, and the parts cost and assembly man-hours can be greatly reduced.

  Further, since the radial ribs 68 are continuous with both the outer peripheral portion of the holder main body 32 and the upper surface of the flange portion 60, the mechanical strength of the holder main body 32 can be improved by providing the radial ribs 68.

  In the present embodiment, the radial ribs 68 are formed on the drain gate 64 side of the center axis L of the holder body 32. However, for example, as shown in FIG. Thus, the radial ribs 68 may be formed on the entire circumference of the holder main body 32.

  Further, in the present embodiment, the radial rib 68 is erected by connecting on the flange portion 60. For example, as shown in FIG. It is good also as a structure which extends and provides the clearance gap D3 between the collar part 60 and the radial rib 68. FIG. In this way, by providing the gap D3 between the flange 60 and the radial rib 68, the rain water flowing down on the flange 60 flows smoothly without being dammed by the radial rib 68 and is drained from the drain gate 64. .

  Furthermore, in the present embodiment, the five radial ribs 68 are formed every 30 degrees around the central axis L of the holder main body 32. However, the number of the radial ribs 68 is not limited to five, but five. It may be less than 5 or more than 5 sheets. However, in principle, it is preferable that the number of the radial ribs 68 is large and the interval between the radial ribs 68 adjacent to each other around the central axis L of the holder body 32 is narrow from the viewpoint of preventing entry of foreign matter.

It is sectional drawing of the principal part of the vehicle to which the wiper pivot which concerns on one embodiment of this invention is applied. It is a top view of the wiper pivot which concerns on one embodiment of this invention. It is a perspective view of the pivot holder of the wiper pivot which concerns on one embodiment of this invention. It is a top view corresponding to Drawing 2 showing the modification of the wiper pivot concerning one embodiment of the present invention. It is sectional drawing corresponding to FIG. 1 which shows the other modification of the wiper pivot which concerns on one embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Wiper pivot, 12 ... Vehicle, 14 ... Pivot holder, 18 ... Vehicle panel (panel member), 32 ... Holder main body, 36 ... Pivot shaft, 38 ... Pivot Hole, 46 ... Pivot lever, 51 ... Link member, 55 ... Link member, 60 ... Gutter, 62 ... Peripheral wall, 64 ... Drain gate (drainage), 68 ...・ Radial ribs

Claims (6)

A pivot shaft that penetrates a pivot hole formed in a panel member constituting the vehicle body from the inside of the vehicle body, and a wiper arm is fixed to a front end side protruding to the front side of the panel member;
A holder body formed in a cylindrical shape rotatably supports the pivot shaft, and a pivot holder fixed to the vehicle body;
A pivot lever having one end fixed to the pivot shaft and a connecting portion of a link member that swings in response to a driving force of a driving means is connected to the other end to transmit the swing of the link member to the pivot shaft;
A plurality of radial ribs arranged close to the pivot hole on the back side of the panel member and radially extending from the outer periphery of the holder body;
Wiper pivot with The distal end portion of the radial rib on the pivot hole side has an outer diameter dimension larger than an inner diameter dimension of the pivot hole.
The wiper pivot according to claim 1. The axial upper end side of the holder main body penetrates the pivot hole, and the holder main body protrudes on the surface side of the panel member.
The wiper pivot according to claim 1 or 2, wherein the wiper pivot is provided. The central axis of the holder body and the pivot shaft is inclined with respect to the vertical direction, and a plurality of the radial ribs are formed on the lower side in the inclination direction of the central axis.
The wiper pivot according to any one of claims 1 to 3, wherein the wiper pivot is provided. A plate-like collar portion is extended in the radial direction from the outer peripheral portion of the holder body on the lower side of the radial rib along the center axis of the holder body.
The wiper pivot according to any one of claims 1 to 4, wherein the wiper pivot is provided. A peripheral wall is erected from the flange portion outwardly from the radial rib along the radial direction of the holder main body and axially upward of the holder main body, and water flowing down the inner peripheral wall of the flange portion is A drainage portion that can pass to the outside of the peripheral wall is formed on the peripheral wall.
The wiper pivot according to claim 5.

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