JPH09301133A - Waterproof structure of pivot shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-priced waterproof structure of a pivot shaft which can decrease the number of components and ensure waterproof performance to keep the amenity in the vehicle compartment, and which is so rich in flexibility that the structure can be used in common even when the angle setting of the pivot shaft and the height of the pivot shaft are different. SOLUTION: In a waterproof structure for waterproofing a pivot shaft 1 by a waterproof member 10, the waterproof member 10 comprises a hollow cylindrical shaft guard part 12, a lip part 11 formed at least on the upper inside of the shaft guard part 12, a fitting part 13 to an outside plate 4 of the vehicle, a connecting part 14 for connecting the fitting part 13 and the lower position of the shaft guard part 12 to each other with flexibility and play, and a skirt part 15 formed on the lower side of the fitting part 13, wherein a disposition hole 4a in the outside plate 4 of the vehicle and the fitting part 13 of the waterproof member 10 are engaged with each other, the skirt part 15 is pressed to the inside plate 5 of the vehicle, and the pivot shaft 1 is inserted in the shaft guard part 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a pivot shaft of a vehicle wiper.

[0002]

2. Description of the Related Art Generally, in a pivot shaft of a vehicle wiper device, a wiper arm is fixed to a tip end side extending from a vehicle body side to the outside, and a base end side is connected to a link arm or an output shaft of a wiper motor. . Then, the wiper motor is driven to rotate the pivot shaft, and this rotation causes the wiper arm to reciprocally swing to wipe the glass surface.

For this reason, waterproof measures have been taken between the vehicle body side and the pivot shaft, but conventionally, various techniques have been proposed for the waterproof structure of the pivot shaft. For example, FIG.
As shown in FIG.
11 c is a panel seal member 118 made of an elastic material that integrally has an annular lip portion 118 b that is in pressure contact with the outer panel 116, and that closes the opening 116 a formed in the outer panel 116 by being in pressure contact with the annular lip portion 118 b. Technology (see, for example, Japanese Utility Model Laid-Open No. 62-156570),
Alternatively, a collar is provided between the seal member and the nut,
When the seal member is pushed by the nut through the collar, the seal member is evenly pressed in a wide area in the vehicle body panel, and the seal member is pressed against the collar and the sleeve at each seal ring portion to seal the seal. Technology for creating a state (for example, Shoukai 62-16216
No. 0), etc. are known.

[0004]

In the technique using the panel seal member (the technique described above), the annular lip portion 118 is used.
The reference symbol b closes the opening 116a in the outer panel 116, and has a waterproof structure in the outer panel 116. However, when water enters between the outer panel 116 and the inner panel 115, it does not have a waterproof structure from the opening 115a of the inner panel 115 into the vehicle interior.

Further, in order to press the annular lip portion 118b and the outer panel 116 against each other, it is necessary to form the annular lip portion 118b according to the length of the pivot shaft.

Further, even in the technique for waterproofing by providing a collar between the seal member and the nut (the above technique), there is no waterproof structure from the inner panel to the vehicle compartment as in the above conventional technique. . Further, since the nut, the collar and the seal member are pressed against each other, it is necessary to form the collar and the seal member according to the length of the pivot shaft.

As described above, in the prior art, the outer panel can be waterproofed, but since the inner panel does not have a waterproof structure, water invades between the outer panel and the inner panel. Sometimes it is not possible to waterproof the vehicle interior. Further, not only waterproofing but also dustproofing and deodorizing cannot be carried out in the vehicle interior, so that there is a problem that dust and odor enter the vehicle interior.

Further, it is necessary to provide a waterproof member adapted to the length of each pivot shaft. For example, in order to dispose the waterproof member on a long pivot shaft, a waterproof member such as a seal member is set to the length of the pivot shaft. Set it together or set it so that only the shaft is extended, so if the shaft gets wet,
The waterproof member is abraded due to the generation of rust due to exposure to water, which causes a problem in waterproofness.

The object of the present invention is to reduce the number of constituent parts, to ensure the waterproof performance, to maintain the comfort in the vehicle compartment, and to be commonly used even when the pivot shaft angle setting and the pivot shaft height are different. It is to provide an inexpensive waterproof structure of a pivot shaft that is highly versatile.

[0010]

In the waterproof structure for a pivot shaft according to the present invention, the pivot shaft extends from a mounting hole of the pivot shaft formed in a vehicle outer plate and a vehicle inner plate and is connected to the wiper arm side. In a waterproof structure for waterproofing a pivot shaft with a waterproof member, the waterproof member is a hollow cylindrical shaft guard portion, a lip portion formed at least inside the upper portion of the shaft guard portion, and a mounting portion to a vehicle outer plate, In the vehicle outer panel, there is provided a connecting portion that connects the mounting portion and a lower position of the shaft guard portion with flexibility and has a play, and a skirt portion formed below the mounting portion. The mounting hole and a mounting portion of the waterproof member are engaged with each other, the skirt portion is brought into pressure contact with the vehicle inner plate, and the pivot shaft is inserted into the shaft guard portion.

Further, it is preferable that the connecting portion is formed in a bellows shape.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a pivot shaft 1 extends from mounting holes 4a and 5a formed in a vehicle outer plate 4 and a vehicle inner plate 5, respectively. The waterproof structure of the pivot shaft in the present invention is a waterproof structure in which the side of the pivot shaft 1 connected to the wiper arm 6 is waterproofed by the waterproof member 10. The waterproof member 10 includes a hollow cylindrical shaft guard portion 12, a lip portion 11 formed inside at least an upper portion of the shaft guard portion 12, a mounting portion 13 to a vehicle outer plate 4, the mounting portion 13 and the shaft guard. A connecting portion 14 for connecting the lower position of the portion 12 with flexibility and having play, and a mounting portion 13.
And a skirt portion 15 formed below.
Then, the mounting hole 4a in the vehicle outer plate 4 and the waterproof member 10
The skirt portion 15 is brought into pressure contact with the vehicle inner plate 5 and the pivot shaft 1 is inserted into the shaft guard portion 12 while engaging with the mounting portion 13 of.

According to the above-described embodiment, the waterproof member 10 includes a hollow cylindrical shaft guard portion 12 and a lip portion 11 formed at least inside the upper portion of the shaft guard portion 12.
And a connecting portion 14 for connecting the mounting portion 13 to the vehicle outer plate 4, the mounting portion 13 and the lower position of the shaft guard portion 12 with flexibility and play, and below the mounting portion 13. The skirt portion 15 to be formed is provided, and the mounting hole 4a in the vehicle outer plate 4 and the mounting portion 13 of the waterproof member 10 are engaged with each other, and the skirt portion 15 is pressed against the vehicle inner plate 5. Since the pivot shaft 1 is inserted into the shaft guard portion 12, the pivot shaft 1 and the vehicle outer plate 4 are waterproofed by the mounting portion 13, and the vehicle outer plate 4 and the vehicle inner plate 5 are waterproofed. Made by the skirt 15 and also pivot axis 1
The shaft guard portion 12 can be used for waterproofing.

Further, due to the connecting portion 14 which is flexible and has a play, the waterproof member 10 has versatility so that it can be commonly used depending on the length and inclination of the pivot shaft 1. .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the members, arrangements, and the like described below do not limit the present invention and can be variously modified within the scope of the gist of the present invention. 1 shows a first embodiment of the present invention. FIG. 1 is a sectional view of a main part showing an example in which the pivot shaft has a short length, and FIG. 2 shows an example in which the pivot shaft has a long length. It is a similar principal part sectional view.

Generally, in a vehicle wiper device, the pivot shaft 1 is disposed in a pivot shaft holder 2, and the tip end side of the pivot shaft 1 extends from the pivot shaft holder 2 to the outside. The pivot shaft 1 extends from the vehicle body side, and an arm head 3 forming a wiper arm 6 is disposed on the tip end side of the pivot shaft 1. The arm head 3 is provided with a recess 3a having a concave cross section and a through hole 3b through which the tip of the pivot shaft 1 penetrates. The base end side of the pivot shaft 1 is connected to a link arm or an output shaft (not shown) of a wiper motor. Further, in FIG. 1, reference numeral 7 is an arm head cover, and reference numeral 8 is an arm spring.

The waterproof structure of the pivot shaft 1 in this example is as follows.
As shown in FIG. 1, a pivot shaft provided with a pivot shaft holder 2 through a disposition hole 4a of a pivot shaft 1 formed in a vehicle outer plate 4 and a disposition hole 5a of a pivot shaft 1 formed in a vehicle inner plate 5. 1 extends, and the pivot shaft 1, the vehicle outer plate 4, and the vehicle inner plate 5 are waterproofed by a waterproof member 10.

The waterproof member 10 of this embodiment has a cap structure composed of an elastic member such as rubber, and has a hollow cylindrical shaft guard portion 12 and a lip formed inside the upper portion of the shaft guard portion 12. Portion 11, mounting portion 13 to the vehicle outer plate 4, the mounting portion 13 and the shaft guard portion 12
A connecting portion 14 for connecting and having a play with flexibility.
And a skirt portion 15 formed below the mounting portion 13.
And

The hollow cylindrical shaft guard portion 12 of the present example has a folded-back portion 12 a formed at an upper end portion thereof, and a plurality of lip portions 11 are provided inside the shaft guard portion 12.
Are formed at three locations. The shaft guard portion 12 of this example has a thick wall as a whole, and is a rigid body that holds the lip portion 11. Then, the lip portion 11 comes into close contact with the pivot shaft 1 and slides.

Further, a contact portion 16 is formed at the inner end position of the shaft guard portion 12 of this example.
Touches the upper end surface of the pivot shaft holder 2 and pushes up the shaft guard portion 12 and the lip portion 11. Further, in this example, at the lower outer position of the shaft guard portion 12,
A connecting portion 14 to be described later is integrally formed.

The mounting portion 13 of this embodiment has a fitting groove portion 13 which is fitted to the edge of the mounting hole 4a in the vehicle outer plate 4 at the outer peripheral position.
a is formed, and a cylindrical hollow portion 13b is formed inside. The diameter of the inner cylindrical hollow portion 13b is formed to be larger than the diameter of the shaft guard portion 12.

Further, the skirt portion 15 of the present example is formed so as to project from below the mounting portion 13. The skirt portion 15 has flexibility and is located between the vehicle outer plate 4 and the vehicle inner plate 5. The skirt portion 15 is formed so as to be in pressure contact with the vehicle inner plate 5 so as to be spread rearward.

The connecting portion 14 of this embodiment connects the shaft guard portion 12 and the mounting portion 13 with a play having flexibility. That is, the connecting portion 14 of this example is thin and has flexibility as a whole, and connects the small-diameter shaft guard portion 12 and the large-diameter mounting portion 13.

Next, the mounting of the waterproof member 10 having the above structure will be described. First, the installation hole 4a of the vehicle outer plate 4
Fit the fitting groove 13a of the mounting portion 13 to the edge of
The vehicle outer plate 4 and the mounting portion 13 are engaged with each other. At this time, the skirt portion 15 is located between the vehicle outer plate 4 and the vehicle inner plate 5 and presses the upper surface 5b of the vehicle inner plate 5. Next, the pivot shaft 1 is inserted into the shaft guard portion 12.

As a result, the pivot shaft 1 and the vehicle outer plate 4 are waterproofed by the mounting portion 13, the vehicle outer plate 4 and the vehicle inner plate 5 are waterproofed by the skirt portion 15, and the pivot shaft 1 is waterproofed. This can be performed by the shaft guard portion 12.

The skirt portion 15 for waterproofing the vehicle outer plate 4 and the vehicle inner plate 5 not only waterproofs but also simultaneously protects the vehicle interior from dust and odor to keep the vehicle interior comfortable. it can.

Further, the waterproof member 10 has versatility so that it can be commonly used depending on the length and the tilted state of the pivot shaft 1. That is, when the vehicle body outer plate 5 is inclined at an angle different from that of this example, or when the pivot shaft 1 is inclined due to the positional relationship of the wiper device, the hollow shaft guard portion 1
By inserting the pivot shaft 1 into the inside of the shaft 2, the lip part 11 and the shaft guard part 12 of the waterproof member 10 are tilted according to the tilt of the pivot shaft 1, but this tilt is flexible and free of play. With the connecting portion 14 that has and connects, the mounting portion 13 can be dealt with without affecting.

Since the reaction force generated from the connecting portion 14 holds the connecting portion 14 at the lower position of the shaft guard portion 12, it does not reach the lip portion 11 and the lip portion 11 makes uniform contact. The pressure remains and the lip 11
Uneven wear does not occur, and a reliable waterproofing effect can be obtained.

Further, with respect to the pivot shafts 1 having different lengths (heights) extending to the outside, when the pivot shaft 1 extends to the outside as shown in FIG. 2, for example, the waterproof member 10 is provided.
The pivot shaft 1 is inserted into the shaft guard portion 12 of the shaft guard portion 12, and the upper end portion of the pivot shaft holder 2 is brought into contact with the contact portion 16 formed at the lower end portion of the shaft guard portion 12.
Since the play of the connecting portion 14 is extended by pushing up, the waterproof member 1 can be connected to the connecting portion 14 even if the height of the pivot shaft 1 changes.
0 expands and contracts, and the optimum clearance between the arm head 3 and the waterproof member 10 can always be secured.

On the other hand, as shown in FIG. 1, when the pivot shaft 1 is shortly extended to the outside, the connecting portion 14 is mounted with play.

In this example, the lip portion 11 is formed at three places, but the number is not limited to three, and any number of places may be provided.

FIG. 3 is an explanatory view showing another embodiment of the present invention. In this embodiment, the same members as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this example, the lip portion 11 is formed inside the upper end of the shaft guard portion 12, and the fixing portion 21 is extended to the lower end portion of the shaft guard portion 12 so as to fit the outer diameter of the pivot shaft holder 2. The fixing portion 21 is a rigid body, and a shoulder pad portion 22 is formed inside the fixing portion 21 at a position on the lip portion 11 side.

The fixing portion 21 of this embodiment is for adjusting the lip portion 11 to the inclination of the pivot shaft 1, and the shoulder rest portion 22 of this embodiment is for pushing up the shaft guard portion 12 (that is, the lip 11). .

In this example, the connecting portion 14 is formed into a thin bellows shape, and is connected at a substantially intermediate position of the shaft guard portion 12. The connecting portion 14 expands and contracts according to the inclination and height of the shaft guard portion 12 and is flexible to one side.

According to this example, the pivot shaft 1 is attached to the fixed portion 21 formed as a rigid body against the inclination of the pivot shaft 1.
By inserting, to match the tilt of the pivot shaft 1,
The lip portion 11 of the holding member 10, the shaft guard portion 12,
The fixing portion 21 and the shoulder rest portion 22 are inclined, and the inclination does not affect the mounting portion 13 due to the bellows-shaped connecting portion 14.

The reaction force generated from the bellows-shaped connecting portion 14 does not reach the lip portion 11 because the pivot shaft 1 and the pivot shaft holder 2 are engaged and held by the fixing portion 21 of the holding member 10. Since the contact pressure remains uniform, uneven wear of the lip portion 11 does not occur, and waterproofing can be reliably performed. The bellows-shaped connecting portion 14 expands and contracts to cope with different heights of the pivot shaft 1.

[0038]

As described above, according to the present invention, the pivot shaft can be waterproofed by a single component, and the pivot shaft and the vehicle outer plate can be waterproofed, the vehicle outer plate and the vehicle inner plate can be waterproofed, and the pivot can be pivoted. The axis can be waterproofed. In particular, in the waterproof structure of the vehicle outer plate and the vehicle inner plate, it is possible to simultaneously prevent dust and odor and keep the vehicle interior comfortable.

Further, the waterproof member can be made versatile so that it can be commonly used regardless of the length of the pivot shaft, and even if the pivot shaft is tilted, the connecting portion having play affects the mounting portion. It is possible to follow the tilt of the pivot axis without any. Then, even if the tilt of the pivot axis and the height are different at the same time, it is possible to sufficiently cope with it.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 3 is a sectional view of a main part showing another embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 1 Pivot Shaft 2 Pivot Shaft Holder 3 Arm Head 3a Recess 3b Through Hole 4 Vehicle Outer Plate 4a Arrangement Hole 5 Vehicle Inner Plate 5a Arrangement Hole 6 Wiper Arm 7 Arm Head Cover 8 Arm Spring 10 Waterproof Member 11 Lip Part 12 Shaft Guard 13 Mounting part 14 Connecting part 15 Skirt part 16 Abutting part

Claims (2)

[Claims] 1. A waterproof structure in which a pivot shaft extends from a mounting hole of a pivot shaft formed in a vehicle outer plate and a vehicle inner plate, and a pivot shaft connected to a wiper arm side is waterproofed by a waterproof member. Is a hollow tubular shaft guard portion, a lip portion formed inside at least an upper portion of the shaft guard portion, a mounting portion to a vehicle outer plate, and a lower position of the mounting portion and the shaft guard portion are flexible. And a skirt portion formed below the attachment portion, the engagement hole engaging the attachment hole of the waterproof member and the attachment hole of the vehicle outer plate. At the same time, the waterproof structure of the pivot shaft is characterized in that the skirt part is pressed against the vehicle inner plate and the pivot shaft is inserted into the shaft guard part. 2. The waterproof structure for a pivot shaft according to claim 1, wherein the connecting portion is formed in a bellows shape.