JP2000225925A - Wiper pivot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent connection sections connecting a pivot lever and a link rod from wearing by preventing the water flowing out from a pivot holder from reaching the connection sections in miniaturized, light and simple structure. SOLUTION: In a wiper pivot 1 provided with a pivot shaft 5, which is projected penetrating a vehicle panel 4 from the inside to the outside and at the tip of which a wiper arm 2 is fixed, a pivot holder 6, which is fixed to a car body 41 and rotatably supports the pivot shaft 5, and a pivot lever 7, one end of which is fixed to the lower end of this pivot shaft 5 and which is arranged on the lower side of the vehicle panel 4, the pivot lever 7 is provided with connection sections 70 and 71 on the other side of which a link rod 13 is connected to transmit the swinging motion from a motor 11 to the pivot shaft 5, and a cap member 10, which is secured between these connection sections 70 and 71 and the pivot shaft 5. This cap member 10 has dams which reduce the speed of the water flowing down from the pivot shaft side to the connection sections and a guide sections 52, which are formed in the end sections of the connection sections 70 and 71 and guide the water the flowing speed of which is reduced outside of the connection sides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper pivot of a wiper device for wiping a windshield glass or the like of a vehicle.

[0002]

2. Description of the Related Art Generally, a wiper device for wiping a windshield glass of an automobile has a pivot shaft to which a wiper arm is fixed at a tip. The pivot shaft is rotatably supported by a pivot holder fixed to the vehicle body corresponding to the pivot hole of the vehicle panel, and penetrates through the pivot hole to protrude from the inside of the vehicle body to the outside. One end of a pivot lever is fixed to the rear end of the pivot shaft, and a link rod for converting the rotational motion of the wiper motor into a swinging motion is connected to the other end of the pivot lever. The swinging motion of the link rod is returned to a rotating motion about the pivot axis by the pivot lever, and the rotation of the pivot shaft causes the wiper arm and the wiper blade to reciprocate within a predetermined range, thereby causing raindrops on the windshield glass surface to fall. It is configured to wipe off dust and mud.

However, in the above-mentioned wiper device, water that has entered from the pivot hole during rainfall or vehicle washing flows down the pivot holder and the pivot lever and flows down to the connecting portion between the link rod and the pivot lever. At this time, the connecting portions are connected to each other so as to freely roll using a ball joint or the like, and a lubricating oil such as grease is applied to this connecting portion to prevent abrasion. There was a problem that the connection portion was splashed and the lubricating oil and fat flowed out and was easily worn.

[0004] In order to prevent this, a conventional method has been proposed.
A wiper pivot structure as disclosed in JP-A-121746 and JP-A-62-161071 is known. That is, in the wiper device disclosed in the above publication, as shown in FIG. 4, a pivot holder 106 rotatably supporting a pivot shaft 105 is provided with a pivot hole 112 of a vehicle panel 104 arranged below the glass surface 103. It penetrates and projects outward from the inside of the vehicle body and is fixed. The wiper arm 102 is fixed to the tip of the pivot shaft 105, and one end of the pivot lever 107 is fixed to the rear end. A ball pin 108 is implanted at the other end of the pivot lever 107, and a ball bearing 109 attached to one end of the link rod is rotatably connected. The vehicle panel 104 has a drain hole 111 for preventing water from accumulating for rust prevention. In order to prevent the water flowing down from the drain hole 111 from dropping onto the connecting portion between the ball pin 108 and the ball bearing 109, a guide 110 for guiding the water to a position outside the connecting portion is provided.

[0005] However, since the pivot lever 107 rotates, in order to guide the water to a position outside the connecting portion, the pivot lever 107 extends far from the pivot holder 106 so as to discharge the water outside the range in consideration of the rotation range of the pivot lever 107. The guide 110 must be provided so as to be extended, and the pivot holder 106 on which the guide 110 is formed has been increased in size and weight.

[0006]

SUMMARY OF THE INVENTION The present invention solves such a problem, and the water flowing down from the pivot holder reaches the connecting portion between the pivot lever and the link rod with a simple structure of small size and light weight. It is an object of the present invention to provide a wiper pivot that can prevent the wear of the connecting portion.

[0007]

The present invention employs the following technical means to achieve the above object. However, the reference numerals in parentheses of the following means indicate the correspondence with the specific means described in the embodiment described later, and the present invention is not limited to this.

A wiper pivot (1) according to the first aspect of the present invention comprises a pivot shaft (5) having a vehicle panel (4) protruding from the inside to the outside and having a wiper arm (2) fixed at a tip thereof; A pivot holder (6) fixed to (41) and rotatably supporting the pivot shaft (5).
A wiper pivot (1) comprising: a pivot lever (7) having one end fixed to a lower end of the pivot shaft (5) and disposed below the vehicle panel (4). A connecting portion (70, 71) to which a link rod (13) for transmitting a swinging motion from a motor (11) to the pivot shaft (5) is connected to the other end, and the connecting portion (70, 71). ) And a cap member (10) mounted between the pivot shaft (5), and the cap member (10) reduces the flow speed of water from the pivot shaft side to the connection portion side. Weirs (50, 51, 5)
3) and a guide part (52) formed at the end of the connection part side to guide the water decelerated down to the outside of the connection part.

In the wiper pivot according to the first aspect, a cap member is mounted on the pivot lever between the pivot shaft and the connecting portion where the pivot lever and the link rod are coupled, and the cap member is provided with a weir. Therefore, the water flowing down the pivot holder is reduced in flow speed by the weir, and after the speed reduction, the water is guided out of the connecting portion by the guide portion and discharged. In this way, the guide discharge is performed after the flow velocity is reduced by providing the weir, so that when water flows in vigorously, the water is prevented from overflowing and flying to the connecting portion. Further, since the cap member is mounted on the pivot lever and rotates together with the pivot lever, it is possible to prevent water from splashing on the connecting portion with a small, lightweight and simple configuration without considering the pivot range of the pivot lever.

According to a second aspect of the present invention, in the wiper pivot (1), the weirs (50, 51) are arranged in a plurality of stages from the pivot shaft side of the cap member (10) toward the guide portion (52). It is characterized by being formed separately.

In the wiper pivot according to the second aspect, since the weir is formed in a plurality of stages from the pivot shaft side to the guide part, water flowing down to the guide part formed on the connecting part side is formed by the weir. When the water reaches the guide portion after being dammed by the damper, the flow speed is sufficiently reduced and the guide portion discharges the water without overflowing. This flow rate can adjust the degree of attenuation by forming a plurality of weirs and changing their arrangement and shape.

According to a third aspect of the present invention, in the wiper pivot (1), the cap member (10) covers the vehicle panel side of the pivot lever (7).
4) a skirt portion (61) extending downward from the pivot lever (7) to cover the side surface (7a) of the pivot lever (7), and the weirs (50, 51) are provided on both sides of the pivot lever (7). A first weir (50a, 50b) that is arranged to face the side with an interval therebetween and extends to the skirt portion (61); and the first weir (50a, 50b).
A second weir (51) formed at a position corresponding to the interval
And characterized in that:

In the wiper pivot according to the third aspect, since the cap member extends downward from the covering portion covering the vehicle panel side of the pivot lever and the skirt portion covers the side surface of the pivot lever, the connecting portion is formed. Even if it is provided on the back side of the pivot lever (the side opposite to the vehicle panel), the water that has flowed down the pivot lever drops from the side along the skirt part and wraps around the back side of the pivot lever As a result, it is possible to prevent the lubricating oil and fat in the connecting portion from flowing out. In addition, since the first weir extends to the skirt portion, the water flowing down to the side of the pivot lever can be decelerated and immediately discharged.

According to a fourth aspect of the present invention, in the wiper pivot (1), the guide portion (52) is a wall that is erected continuously from an edge of a connection portion side end of the cap member (10). It is characterized by:

In the wiper pivot according to the fourth aspect, the guide portion is formed by standing the wall continuously from the edge of the connecting portion side end of the cap member without any seam, so that the speed is finally reduced. Guided and drained without leaking water.

According to a fifth aspect of the present invention, in the wiper pivot (1), the cap member (10) is in close contact with the peripheral surface of the pivot shaft (5) to be inserted, and the pivot holder (6) and the It is characterized by having a seal part (60) for sealing between the pivot shaft (5).

In the wiper pivot according to the fifth aspect, a seal portion is provided on the cap member, and when the pivot member is mounted on the pivot member, the pivot shaft projects and closely adheres to the peripheral surface thereof. By covering the part side as well, the cap member has not only a function of preventing water from flowing to the connecting part, but also a sealing function of preventing water from entering between the pivot shaft and the pivot holder.

[0018]

1 and 2 show a first embodiment of the present invention. FIG. 1 shows a wiper pivot 1 according to a first embodiment of the present invention applied to a vehicle, and its overall configuration is shown in a sectional view.

A wiper pivot 1 is disposed at the front lower edge of the windshield of the vehicle, and the glass surface 3 is wiped by a wiper arm 2 and a wiper blade (not shown) fixed to a pivot shaft of the wiper pivot 1. The wiper pivot 1 has a pivot holder 6. The pivot holder 6 is formed by, for example, die-casting an aluminum alloy, and is formed as a part of a wiper frame integrally provided with a pair of wiper pivots arranged in the vehicle width direction. A fixed portion 45 is formed integrally with the pivot holder 6 at an intermediate portion in the axial direction. The fixing portion 45 is provided with a mounting hole 46. The mounting hole 46 is fixed to the vehicle body (cowl panel) 41 by a mounting bolt 44 via a rubber mount 43 and a collar, and the pivot holder 6 is mounted on the vehicle panel 4. It is arranged directly below the formed pivot hole 12. At this time, the pivot shaft 5 is attached so as to be inclined with respect to the top direction.

The pivot shaft 5 is inserted into the inner hole 6a of the pivot holder 6, and a pair of upper and lower bearings (not shown) is provided.
It is rotatably supported via. This pivot shaft 5
Project from the tip of the pivot holder 6 and further penetrate through the pivot hole 12 to project from the inside to the outside of the vehicle body. As shown in FIG. 2, one end of a pivot lever 7 is fixed to an intermediate portion in the axial direction of the pivot shaft 5, that is, to a tip end side of the pivot holder 5.
The C-ring 5a prevents the pivot shaft 5 from coming off in the axial direction. The rear end side of the pivot shaft 5 is also restricted from moving in the axial direction with respect to the pivot holder 6 by a washer and a C-ring. Further, at the tip of the pivot shaft 5, an arm head portion of the wiper arm 2 is provided with a nut 23.
The fastening portion is covered by a blind cap 22.

On the other end of the pivot lever 7, a connecting pin 8 constituting a connecting portion 70 for connecting a link rod 13 for converting the rotational force of the wiper motor 11 into a swinging motion and transmitting the same is connected to the vehicle panel 4 It is planted and fixed to the side by caulking. The connecting pin 8 has a spherical portion 8a having a spherical peripheral surface, and a resin ball bearing 9 constituting a connecting portion 70 formed at one end of the link rod 13 fits into the spherical portion 8a. Are connected so that they can roll freely. In addition, grease (lubricating oils and fats) for preventing wear is applied to the rolling portion between the spherical portion 8a and the ball bearing 9.

On the other hand, on the opposite side (opposite to the vehicle panel 4) of the pivot lever 7 opposite to the side where the connecting pin 8 is planted, a connecting pin 14 constituting the connecting portion 71 is planted similarly to the connecting pin 8. ing. A link rod (not shown) for transmitting a swinging motion to a pivot lever of the other (not shown) of the pair of wiper pivots is connected to the connecting pin 14,
A ball bearing 15 provided at one end is rollably loaded like the ball bearing 9, and is coated with grease.

The cap member 10 includes a covering portion 64 covering the surface of the pivot lever 7 on the vehicle panel 4 side, a sealing portion 60 protruding from the covering portion 64 and through which the pivot shaft 5 is inserted, and a covering portion 64. A skirt portion 61 extending around the periphery except for a part along the side surface 7a of the pivot lever 7 from the peripheral edge of the pivot lever 7 and extending downward, the connecting pin side of the skirt portion 61 is open and stands at the open edge. The provided guide portion 52 described later and the weirs 50 and 51 formed on the surfaces of the covering portion 64 and the skirt portion 61 are made of a resilient material such as rubber material or resin (for example, nitrile rubber). It is molded integrally.

The seal portion 60 has a seal hole 62 which covers the outer periphery of the distal end portion of the pivot holder 6 and slidably adheres to the outer peripheral surface of the pivot shaft 5.
A plurality of lip portions 63 are formed in the axial direction over the entire circumference of the lip portion 63. This prevents water, dust and the like from entering between the pivot shaft 5 and the inner hole 6a of the pivot holder 6.

The skirt portion 61 is covered with the covering portion 64 as described above.
Extend along the side surface 7a of the pivot lever 7 from the peripheral edge of the pivot lever 7 and extend along the side surface 7a of the pivot lever 7.
Is set to be larger than the height dimension (plate thickness dimension of the pivot lever) and to such an extent that the rotation of the pivot lever 7 is not hindered.

The guide portion 52 is provided upright on the open end edge of the cap member 10 on the side of the connecting portions 70 and 71, and is integrally formed as a wall extending outward from the surfaces of the covering portion 64 and the skirt portion 61. . This prevents the water that has entered from the pivot hole 12 from traveling along the wiper arm 2 (arm head) and the pivot lever 7 (surface of the cap member) to the connecting portions 70 and 71, and the water blocked by the guide portion 52. Is guided along the skirt and discharged.

The weir is formed integrally with the first weir 50, which is formed so as to protrude outward from the surface of the covering portion 64 and the skirt portion 61, and is formed so as to protrude integrally (outside the vehicle panel 4) from the surface of the covering portion 64. The second weir 51 comprises a pivot shaft 5
And the guide portion 52. Moreover, a plurality of weirs are formed from the pivot shaft 5 toward the connecting portions 70 and 71, that is, a plurality of weirs are sequentially set up in the water flowing direction. The first weir 50 is made up of divided weirs 50a and 50b that are opposed to each other with an interval in the width direction of the cap member 10. Split weir 50a, 50
“b” has inclined portions 50 c that face each other and are inclined on the interval side (so that the interval is gradually narrowed), and each is formed to protrude outward along the skirt portion 61. 2nd weir 51
Is located at a position farther from the pivot shaft 5 than the first weir.
The second weir is further damped by the second weir to attenuate the flow velocity, which is formed corresponding to the weir interval.

Next, the operation of the first embodiment will be described. In the wiper pivot 1 having the above-described configuration, the cap member 10 is attached to the distal end portion of the pivot holder 6 and the pivot lever 7, and the seal member 60 of the cap member 10 slidably adheres to the outer peripheral surface of the pivot shaft 5. Water and muddy water are prevented from entering from the sliding surface between the pivot shaft 5 and the seal portion 60. This can prevent water, muddy water and the like from entering between the pivot shaft 5 and the inner hole 6a of the pivot holder 6.

Further, since the wiper arm generally rotates along the inclined glass surface 3, the pivot shaft 5 to which the wiper arm is fixed is often arranged to be inclined with respect to the vehicle body. Then, the pivot lever 7 is also fixed to the pivot shaft 5 in an inclined state with the connecting portions 70 and 71 facing downward.
In such a case, the water that has entered from the pivot hole 12 flows down along the tilted pivot lever 7, more specifically, the cap member 10 attached to the pivot lever 7, along the wiper arm or the like. However, the flow-down speed of the flow-down water is sufficiently reduced by the weirs 50, 51 provided on the cap member 10, so that the guide portion 52 having a relatively low height does not overflow. Then, the flow speed is reduced, and the water is guided by the guide portion 52 to the connecting portion 70,
Drained without reaching 71.

The first weir collects the water flowing down by the inclined portions 50c of the divided weirs 50a and 50b which are arranged opposite to each other with an interval therebetween so that the collected water is further blocked by the second weir. It has become.

The guide portion 52 is formed such that the connecting pin side of the cap member 10 is open and a continuous wall is formed upright on the outer edge thereof, so that water does not leak and the guide portion 52 does not leak from the skirt portion 61 side. Even if it goes around, it is dripped from the skirt portion 61 and drained by the guide portion 52 without reaching the connecting portions 70 and 71.

As is apparent from the above description, according to the wiper pivot 1 according to the first embodiment of the present invention, the cap member 10
Is attached and water that has entered through the pivot hole 12
0, 71, so that even if the pivot lever 7 rotates, the pivot lever 7 and the cap member 1
It is necessary to have a large one that rotates integrally with the zero and takes it out of the range in consideration of the moving range in which the connecting part moves, such as when a drainage guide groove is provided on the fixed side of the pivot holder or the vehicle body. There is no.

Next, another embodiment of the present invention will be described.
Since the basic configuration is the same as that of the first embodiment, a detailed description will be omitted.

FIG. 3 schematically shows the shapes and arrangements of the weirs and guides of the cap member 10 of the wiper pivot according to the second to fifth embodiments of the present invention. First, as in the second embodiment shown in FIG. 3A, another weir 50e may be provided between the divided weirs 50a, 50b of the first weir 50 in the first embodiment. Further, the second weir 51 may be divided into divided weirs 51a and 51b.

As in the third embodiment shown in FIG. 3B, the second weir 51 in the first embodiment is divided into divided weirs 5.
1a, 51b, and the length of the divided weir is the first weir 50a,
The interval between 50b may be shorter. Further, the distance M between the first weir and the second weir may be reduced.

As in the fourth embodiment shown in FIG. 3C, the length S of the second weir 51 in the first embodiment is set to be longer than the distance L between the first weirs 50a and 50b. Is also good.

As in the fifth embodiment shown in FIG. 3D, a third weir 53 may be provided on the guide portion 52 side of the second weir 51 in the first embodiment. The third weir can have various shapes and arrangements similarly to the first weir and the second weir. In this example, the divided weirs 53a and 53b are formed only on the covering portion 64, and are formed on the skirt portion 61. It has not been.

As described above, like the wiper pivots according to the second to fifth embodiments, the shapes and arrangements of the weirs and the guide portions are variously changed to adjust the deceleration rate of the flowing speed of the invading water and the discharge point. You can do it.

In the above embodiment, the pivot holders 6 provided in a pair in the vehicle width direction are integrally formed by a wiper frame made of an aluminum alloy.
The pivot holders 6 may be attached to the vehicle body as independent and separate pivot holders. Further, the pair of pivot holders may be connected by a pipe-shaped frame. Furthermore, it is not necessary to use a pair, and one independent pivot may be used.

Further, in the above embodiment, the guide portion 52 of the cap member is formed by the wall erected from the covering portion 64, but may be formed as a groove since the discharge is performed after the flow speed is reduced, and the groove may be formed. And a wall.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an overall configuration in which a wiper pivot according to a first embodiment of the present invention is applied to a vehicle.

FIG. 2 is an exploded perspective view showing a main part of the wiper pivot according to the first embodiment of the present invention.

FIG. 3 is an explanatory view illustrating a cap member of a wiper pivot according to another embodiment of the present invention.

FIG. 4 is an explanatory view showing a conventional wiper pivot.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wiper pivot, 2 ... Wiper arm, 4 ... Vehicle panel, 5 ... Pivot shaft, 6 ... Pivot holder, 7 ... Pivot lever, 10 ... Cap member, 11 ... Motor, 13 ...
Link rods, 70, 71: connecting part, 41: body, 5
0, 51, 53 ... weir, 52 ... guide part, 60 ... seal part,
61: skirt portion, 64: covering portion, WS: wiper switch,

Claims (5)

[Claims] 1. A pivot shaft through which a vehicle panel projects from inside to outside, and a wiper arm is fixed to a tip of the pivot shaft.
A wiper pivot comprising: a pivot holder fixed to a vehicle body and rotatably supporting the pivot shaft; and a pivot lever having one end fixed to a lower end of the pivot shaft and disposed below the vehicle panel. The lever includes, on the other end side, a connecting portion to which a link rod that transmits a swinging motion from a motor to the pivot shaft is connected, and a cap member mounted between the connecting portion and the pivot shaft. The cap member, a weir that reduces the flow rate of water from the pivot shaft side to the connection part side, and a guide part that is formed at the connection part side end and guides the water whose flow rate has been reduced to the outside of the connection part. A wiper pivot. 2. The wiper pivot according to claim 1, wherein the weir is formed in a plurality of stages from the pivot shaft side of the cap member toward the guide portion. 3. The cap member has a skirt portion extending downward from a covering portion covering the vehicle panel side of the pivot lever to cover a side surface of the pivot lever, wherein the weir comprises the pivot member. A first weir, which is arranged on both sides of the lever so as to face each other with a space therebetween and extends to the skirt portion, and a second weir formed at a position corresponding to the space between the first weirs. The wiper pivot according to claim 1 or 2, wherein the wiper pivot is provided. 4. The wiper pivot according to claim 1, wherein the guide portion is a wall that is erected continuously from an edge of an end of the cap member on the connecting portion side. 5. The cap member according to claim 1, wherein the cap member has a seal portion that is in close contact with a peripheral surface of the pivot shaft to be inserted and seals a space between the pivot holder and the pivot shaft. The wiper pivot according to claim 4.