JPH0451079Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a support device for a wiper shaft.
In particular, the present invention relates to an improvement in the seal structure, which is effective when used, for example, to securely attach a wiper shaft near a window glass of an automobile.

[Conventional technology]

The wiper shaft is fixedly attached near the windshield of a car. As a supporting device for the wiper shaft, the wiper shaft is rotatably fitted into a bearing bushing, and this bushing is inserted into a mounting hole made near the windshield of a car body panel. At the same time, after a locking ring as a sealing member is fitted to the protruding end, a nut is screwed onto the bearing bushing and a wiper shaft is attached to the panel, and the annular lip of the locking ring is secured by the nut. Some panels are configured to create a sealed state by being crimped onto the panel (for example,
(See Publication No. 20861).

[Problem that the invention attempts to solve]

In such a wiper shaft support device, there is a problem that the sealing state cannot be maintained sufficiently.

An object of the present invention is to provide a wiper shaft support device that can obtain a sufficient sealing condition.

[Means for solving problems]

The wiper shaft support device according to the present invention includes a collar interposed between the seal member and the nut, and the seal member includes a ring-shaped portion that fits tightly into the sleeve, and a ring-shaped portion that protrudes from the inner peripheral surface of the ring-shaped portion. a first seal ring portion that presses against the outer peripheral surface of the sleeve; a second seal ring portion that presses against the end surface of the collar; a flange portion that presses against the end surface of the flange portion of the collar; and a projecting portion on the end surface of the flange portion. The present invention is characterized in that a third seal ring that is pressed against the end face of the flange portion of the collar and a plurality of skirt portions that project from the flange portion and are pressed against the panel, respectively, are integrally formed.

[Effect]

Since the sealing member is pressed by the nut through the collar, it is evenly pressed over a wide area. Further, since the seal member is pressed against the collar and the sleeve at each seal ring portion, a high sealing condition is created.

〔Example〕

FIG. 1 is a longitudinal sectional view showing a wiper shaft support device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the main parts thereof.

In this embodiment, the wiper shaft support device 4
is located near the lower edge of a windshield (not shown) in an automobile and is configured to be attached to a triple-structured vehicle body having three panels 1, 2, and 3, and is used to support a wiper shaft 5. It is equipped with a sleeve 6. The sleeve 6 is formed into an elongated cylindrical shape, and the wiper shaft 5 is rotatably fitted into the hollow portion of the sleeve 6 via a bearing metal 7. A mounting plate 8 formed in the shape of a substantially rectangular panel is disposed on the outer periphery of the rear end of the sleeve 6 and is fitted thereinto, and the sleeve 6 is the innermost panel 3 (hereinafter referred to as the third panel).
The third panel 3 is inserted through each of the panels 3, 2, and 1 from the inside to the outside, and the mounting plate 8 is fixed to the third panel 3 by screwing. A crank 9 is fitted to the rear end of the wiper shaft 5 supported by the sleeve 6 and is arranged perpendicular to the axis, and the crank 9 drives the wiper through a connecting rod (not shown). By being linked to the device, the wiper shaft 5 is rotated back and forth. Also, wiper shaft 5
The front end of is configured to be fastened to the lower end of a wiper arm (not shown) for wiping the window glass.

A sealing member 10 integrally formed in the shape shown in FIG. 2 using an elastic material such as rubber is attached to the outermost first panel 1 of the sleeve 6.
It is fitted from the outside until it hits the second panel 2 in the center. The sealing member 10 includes a main body portion 11 formed in a thin, substantially cylindrical shape, and a ring-shaped portion 12 is integrally connected to the rear end opening of the main body portion 11 . The ring-shaped portion 12 is formed so that its rear end surface is inclined with respect to a plane perpendicular to the axis, and the window glass side (hereinafter referred to as the upper side) is thin and the lower portion is thick. The inner diameter of the ring-shaped portion 12 is set to be approximately equal to the outer diameter of the sleeve 7, and a seal ring portion 13 having a chevron-shaped cross section is annularly protruded from the inner circumferential surface of the ring-shaped portion 12. When the ring-shaped portion 12 is fitted into the sleeve 7, the seal ring portion 13 is compressively deformed and pressed against the outer circumferential surface of the sleeve 7.
It is designed to create a high seal condition. For convenience, the seal ring portion 13 is shown as protruding in FIG. 1, but in reality it is compressed and crushed. The same applies to the second seal ring portion 14, which will be described later. On the front end surface of the ring-shaped portion 12, second seal ring portions 14 having a mountain-shaped cross section are arranged concentrically and protrude into a circular ring shape. A positioning part 15 is disposed at the top of the rear end surface of the ring-shaped part 12 and protrudes rearward in parallel with the axis. , for positioning the seal member 10.

Further, a circular ring-shaped flange portion 16 is arranged concentrically and integrally protrudes from the outer periphery of the front end of the main body portion 11, and the rear end surface of the flange portion 16 is inclined with respect to a plane perpendicular to the axis. The upper part is thinner and the lower part is thicker. Flange part 1
On the front end surface of the collar 6, a third seal ring portion 17 having a mountain-shaped cross section is arranged concentrically and protrudes in a circular ring shape at a position inside a rear end surface rising portion 24 of the collar 20, which will be described later. On the rear end surface of the flange portion 16, a pair of skirt portions 18 and 19, each formed in a substantially trapezoidal conical cylinder shape, are arranged concentrically and protrude rearwardly. The height is low at the top and high at the bottom so that the end sides are inclined with respect to a plane perpendicular to the axis. Both skirt portions 18 and 19 are pressed against the front surface of the first panel 1 as shown in FIG. 1 when the sealing member 10 is pushed into the sleeve 6 until it hits the second panel 2. It is designed to create a double seal condition. A protrusion 19a is provided on the inner peripheral surface of the rear end of the outer skirt portion 19.
However, the inner skirt portion 18 causes the outer skirt portion 1 to
9 is provided in a protruding manner to prevent it from being pushed away from the first panel 1.

The seal member 10 fitted onto the sleeve 6 includes:
A collar 20 integrally molded using resin into the shape shown in FIG. . The collar 20 includes a main body portion 21 formed in a thick, substantially cylindrical shape, and when the collar 20 is pushed into the sealing member 10, the rear end surface of the main body portion 21 touches the ring-shaped portion 13 of the sealing member 10. By crushing the protruding second seal ring portion 14, a highly sealed state is created.
A circular ring-shaped flange portion 22 is arranged concentrically and integrally protrudes from the outer periphery of the front end of the main body portion 21, and rising portions 23 and 24 are formed at a constant height on the outer periphery of the front and rear end surfaces of the flange portion 22. They are each protruded in a ring shape. And color 2
0 is pushed into the seal member 10, the rear end surface of the flange portion 22 crushes the third seal ring portion 17 protruding from the flange portion 16 of the seal member 10, thereby creating a high sealing state. become. Further, the rising portion 24 protruding from the outer peripheral edge of the rear end surface of the flange portion 22 presses against the outer peripheral edge of the front end surface of the flange portion 16 of the sealing member 10 .

Here, the sealing member 10 can be inserted into the sleeve 6 with enough force to bend the first sealing ring 13, and the first sealing ring 13 allows the sealing member 10 to be inserted into the sleeve 6 concentrically with the main body 11. Since the collar 20 is attached to the seal member body 11, alignment of the collar 20 to the seal member body 11 is facilitated, and the collar 2
Inserting 0 is easy to perform.

A nut 25 is screwed into the sleeve 6 into which the sealing member 10 and the collar 20 are fitted, into a male threaded portion 6a carved on the outer periphery of the front end, and when the nut 25 is properly screwed in, the sleeve 6 is fitted with the collar 20. The sealing state is maintained by pressing the sealing member 20 strongly and uniformly on the entire sealing member 10.

The collar 20 and nut 25 fitted into the sleeve 6 are fitted with a cap 2 which is integrally molded with resin into the shape shown in FIG.
6 is covered. The cap 26 includes a fitting part 27 formed in a cylindrical shape having an inner diameter equal to the outer diameter of the wiper shaft 5.
7 is supported by being fitted onto the front end of the wiper shaft 5 protruding from the sleeve 6.
On the outer periphery of the fitting part 27, a front cover part 28 formed in a substantially circular ring shape is arranged concentrically and integrally protrudes. A covering portion 29 is provided to protrude rearward so as to surround the outer periphery of the flange portion 22 of the collar 20. Further, on the rear end surface of the front surface covering section 28, an inner covering section 30 formed in a short substantially cylindrical shape having an inner diameter larger than that of the nut 25 is disposed concentrically inside the side surface covering section 29 and protrudes. It is set up. The cap 26 covers these covering parts 28, 2.
By covering the externally threaded portion 6a of the sleeve 6, the nut 25, and the collar 20 with the sleeves 9 and 30, rainwater is prevented from directly splashing onto these.

In the wiper shaft support device according to the above configuration, the wiper shaft support device enters the inside of the cap 26 and enters the hollow portion of the collar 20 through the threaded portion between the male threaded portion 6a of the sleeve 6 and the nut 25, and the mating surface between the nut 25 and the collar 20. Since the accumulated water is sealed by the outer circumferential surface of the sleeve 6 and the first seal ring portion 13 of the seal member 10, it is reliably prevented from entering the vehicle body.

Flange portion 16 and collar 20 of seal member 10
Water intrusion into the hollow part of the seal member main body part 11 from the mating surface with the flange part 22 of the collar 20 and the third seal ring 17 of the seal member
sealed by. Furthermore, entry of the hollow portion of the collar 20 from the hollow portion of the seal member main body portion 11 is sealed by the second seal ring portion 14 . In other words, water intrusion into the inside of the collar 20 from the mating surface of the sealing member 10 and the collar 20 is completely prevented because the sealing is performed in two stages.

Water that tries to enter along the front surface of the first panel 1 is removed from the double-structured skirt portions 18 and 19.
sealed by. In addition, the skirt portion 18,
19 into the rear space of the second panel 2 is sealed by pressing the rear end surface of the ring-shaped portion 12 of the seal member 10 against the front surface of the second panel 2. In other words, from the first panel 1 to the second panel 2
Water intrusion into the interior is completely prevented because it is sealed in two stages.

In this way, it is possible to reliably prevent water from entering the inside of the second panel 2, thereby increasing the durability of the vehicle body and the wiper drive device.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified without departing from the gist thereof.
It goes without saying that various changes can be made.

For example, the number of threads of each seal ring portion and the number of skirt portions in the seal member may be increased.

[Effects of the Invention] As explained above, according to the present invention, the sealing performance of the wiper shaft support device can be improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a wiper shaft support device according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the main parts thereof. 1, 2, 3... Vehicle body panel, 4... Wiper shaft support device, 5... Wiper shaft, 6... Sleeve, 7... Bearing metal, 8... Mounting plate, 9...
... Crank, 10 ... Seal member, 11 ... Main body part, 12 ... Ring-shaped part, 13 ... First seal ring part, 14 ... Second seal ring part, 15 ...
...Positioning part, 16...Flange part, 17...Third seal ring part, 18, 19...Skirt part,
20... Collar, 21... Main body part, 22... Flange part, 23, 27... Rising part, 25...
Nut, 26... Cap, 28... Front covering part, 29... Side covering part, 30... Inner covering part.

Claims (1)

[Scope of utility model registration request] A wiper shaft that includes a sleeve for rotatably supporting the wiper shaft, a sealing member that is fitted onto the sleeve and a part of which is pressed against a panel, and a nut that is screwed into the sleeve and presses the sealing member. In the supporting device, a collar is interposed between the seal member and the nut, and the seal member includes a ring-shaped portion that fits into the sleeve, and a collar that protrudes from the inner peripheral surface of the ring-shaped portion. a first seal ring portion that presses against the outer peripheral surface of the sleeve; a second seal ring portion that presses against the end surface of the collar; a flange portion that is pressed by the end surface of the flange portion of the collar; A third seal ring that protrudes and presses against the end face of the flange portion of the collar, and a plurality of skirt portions that protrude from the flange portion and press against the panel are integrally formed. Wiper shaft support device.