JPS6268160A - Wiper device for vehicle - Google Patents

Abstract

PURPOSE:To facilitate varying of wiping angle of a wiper arm, in a wiper device where the wiper arm is rotated through a link mechanism through recipro cation of a rocking link, by providing a variable rotary shaft driving means in the link mechanism. CONSTITUTION:The wiper device comprises a rocking link 2 to be reciprocated through function of a drive motor and a link mechanism 3A couplecd with said link 2 to rotate a wiper arm 4A. In the link mechanism 3A, one end of an auxiilary link 31 having the other end pivoted to a body panel P is pivoted to the rocking link 2 while a pin 313 provided at same end section is fitted in an elongated hole 32a of the auxiliary link 32. The other end of the auxiliary link 32 is secured to a shaft 321 to which one end of a drive link 33 is securd. The coupling shaft 331 at the other end of the drive link 33 and a rotary shaft 341 coupled with the base section of the wiper arm 4A and one end of a driven link 35 are coupled through a rotary shaft driving means 5 comprising a gear train 51-53.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wiper device for a vehicle, and more particularly to a wiper device in which the rotation axis of the wiper arm is moved to expand the wiping range.

1. Prior Art] In recent years, there has been a tendency for vehicle windows to be made into puppets in order to improve the sense of openness in the passenger compartment. Wiper devices often have a problem in that a relatively wide area that cannot be wiped is created at the top of the windshield, which has a large effect on visibility from inside the vehicle.

Therefore, with the purpose of solving this problem, I created a link (jH?
A device has been proposed in which the rotating shaft of the wiper arm is moved above the windshield as the wiper operates by combining it with gears (Utility Model Act 52-5 of 1973).
No. 377, Utility Model Publication No. 59-151760>.

[Problems to be Solved by the Invention] By the way, in the device cited above, the locus of movement of the rotary shaft and its rotation angle are directly related to each other, and therefore, when applied to different vehicle types, they are linked. All components such as mechanisms and gears had to be reviewed.

SUMMARY OF THE INVENTION In view of these problems, it is an object of the present invention to provide a wiper device for a vehicle that can be easily applied to different vehicle types by changing the minimum number of components.

[Means for Solving the Problems] A detailed explanation of the present invention will be given with reference to FIGS. 1 and 2.
In the figure, wiper arms 4A and 4B are rotated by link mechanisms 3A and 3B, respectively.

As shown in FIG. 1, the link mechanisms 3A and 3B include a drive link 33 that is reciprocated by the drive motor 1 around a support shaft 321 fixed to the podium, and an intermediate link that has one end connected to the tip of the drive link 33. 34 and the above-mentioned support shaft 321
It is constituted by a driven link 35 which is rotatably supported by a support shaft 351 fixed to a different body and whose tip is connected to the (I!2 end) of the intermediate link 34.

The rotation shaft 341 of the wiper arm 4A is provided on the intermediate link 34, and the link 34 is connected to the drive link 3.
A rotary shaft driving means 5 is provided for rotating the rotary shaft 341 in accordance with the relative rotation of the rotary shaft 341.

[Operations and Effects] When the drive link 33 rotates around the support shaft 321, the rotating shaft 341 provided on the intermediate link 34 moves as shown in FIGS. 5 and 6. During this movement, intermediate link 34
The relative rotation of the drive link 33 causes the rotating shaft 341 to rotate accordingly. As a result, the wiper arm 4A largely protrudes above the front window W to wipe the windshield, as shown in FIGS. 7 and 8.

According to the wiper device of the present invention, by changing the rotary shaft drive means, it is possible to change only the wiping angle of the wiper arm regardless of the locus of movement of the rotary shaft, and by changing the link mechanism, the wiper arm It is possible to change only the locus of movement of the rotating shaft, regardless of the wiping angle. Therefore, it is extremely easy to apply the present invention to vehicle models with different window sizes.

[Embodiment] In Fig. 2, a wiper device is provided in a pod along the lower side of a front window W of a vehicle, and the wiper device is connected to a drive motor 1 and reciprocated in the left-right direction in the figure A swinging link 2 that moves is provided at two places on the left and right and is connected to the swinging link 2, and wiper arms 4A and 4 are connected to the swinging link 2, respectively.
It is composed of link mechanisms 3A and 3B that rotate B.

The link mechanisms 3A and 3B have the same structure, and are composed of auxiliary links 31, 32, drive links 33, intermediate links 34, and driven links 35, as shown in FIG. One end of the auxiliary link 31 is rotatably supported by a support shaft 311 provided on the podium panel P (FIG. 3). At the other end of the auxiliary link 31 there are pins 312 and 31 on both sides, respectively.
The pin 312 is relatively rotatably connected to the swing link 2, and the pin 313 is connected to the auxiliary link 3.
It is inserted into an elongated hole 32a provided in 2.

The auxiliary link 32 is rotatably fixed at one end to a support shaft 321 provided through the body panel P@. These auxiliary links 31 and 32 constitute angle-doubling links, and as will be described later, in accordance with the rotation angle of the auxiliary link 31, the auxiliary link 32 moves by a rotation angle twice that.

One end of a drive link 33 is fixed to the support shaft 321, and a connecting shaft 331 is fixed and erected at the tip of the link 33. The intermediate link 34 is a case body, and the connecting shaft 331 passes through the case wall, thereby connecting the drive link 33 and the intermediate link 34 so as to be relatively rotatable. A rotary shaft drive means 5 is provided in the intermediate link 34, which comprises three gear trains 51, 52, 53 meshing with each other.
It is composed of Then, the gear 51 is connected to the connecting shaft 3.
Must be fixed to 31.

The gear 52 is supported by the case wall and is rotatable, and the gear 53 is fixed to a rotating shaft 341 passing through the case and is rotatable. The base of the wiper arm 4A is fixedly supported at the end of the rotary shaft 341 that protrudes toward the front of the case.
Further, one end of the driven link 35 is rotatably connected to the end of the rotating shaft 341 that projects toward the rear of the case. The other end of the driven link 35 is connected to a support shaft 351 (
(Fig. 4) is rotatably supported. The support shaft 321, the connection shaft 331, and the rotation shaft 341 are arranged to form a right-angled isosceles triangle with the long side between the connection shaft 331 and the rotation shaft 341.

In the wiper device having the above structure, when the swing link 2 starts reciprocating motion, each of the links 31 to 3
5 rotates around support shafts 311, 321, and 351 whose positions are fixed. This is shown in FIGS. 5 and 6. That is,
The auxiliary link 31 rotates 90 degrees around the support shaft 311 during the forward movement of the swing link 2, and accordingly, the auxiliary link 32 and the drive link 33 rotate 18 degrees around the support shaft 321.
Rotate 0 degrees. Due to the operation of such a link, the rotating shaft 34
1 moves upward from the original position in Fig. 1 (Fig. 5) and returns to the original position again (Fig. 6).

During the above operation, the intermediate link 34 rotates 270 degrees relative to the drive link 33. This rotation is then transmitted to the gear 53 from the gear 51 fixed to the connecting shaft 331 via the gear 52, and the rotation is transmitted to the rotating shaft 341 to which the gear 53 is fixed.
is rotated to operate the wiper arm 4A. Since the gear ratio of the gear 51 and gear 53 is assumed to be 1.5,
The rotation shaft 341 rotates 180 degrees relative to the intermediate link 34 during its movement.

Thus, depending on the state of the link mechanism shown in FIGS. 5 and 6, the wiper arm 4A wipes the glass surface of the front window W as shown in FIGS. 7 and 8.

According to the wiper device of the present invention, since the rotating shaft 341 of the wiper arm 4A is moved upward during the wiping operation, even the upper side of the window W can be wiped well. If this is compared with the conventional fixed rotary shaft type wiper device shown by the thin line in FIG. 2, the effect will be clear.

According to the device of the present invention, the rotation angle (that is, the wiping angle) of the wiper arm 4A can be easily changed regardless of its movement trajectory by changing the gear ratio of the gears 51, 53. Further, the movement locus of the rotation angle can be changed independently of the rotation angle by changing the lengths of the intermediate link 34 and, accordingly, the auxiliary link 33 and the driven link 35. In this way, it is possible to quickly adapt to other vehicle models with different shapes of front windows W without requiring major design changes, and the wiping area after the change can be easily predicted without making multiple drawings.

FIGS. 9 to 11 show further embodiments of the present invention.

In the figure, the intermediate link 34 is a flat plate, one end of which is connected to the drive link 33 by a pin 332, and a connecting shaft 331 fixedly erected at the other end. Driven link 35
A case body 35a is provided in the upper half of the case body 35a, and the link 35 is relatively rotatably connected to the intermediate link 34 by the connection shaft 331 passing through the case wall.

Gears 51.5 that mesh with each other are provided in the case body 35a.
3, the gear 51 is fixed to the connecting shaft 331, and the gear 53 is fixed to a rotating shaft 341 rotatably supported on the case wall.

The base of the wiper arm 4A is fixed to the rotating shaft 341 that protrudes from the entire surface of the case.

The other structure is the same as the above embodiment.

The link mechanism having such a structure rotates around each of the supporting shafts 311, 321, and 351 whose positions are fixed during the forward movement of the swing link 2, as shown in FIGS. 12 and 13.

Due to this rotation, the rotating shaft 341 moves upward from the original position in FIG. 9 (FIG. 12) and returns to the original position again (FIG. 13). During this period, the relative rotation between the intermediate arm 34 and the driven arm 35 is transmitted to the rotating shaft 341 by the gears 51 and 53, thereby rotating the wiper arm 4A.

Such an fs structure also provides the same effects as the above embodiment.

Various means can be used to transmit rotation to the rotating shaft 341. For example, as shown in FIG.
3 and a chain 54.

[Brief explanation of drawings]

1 to 8 show an embodiment of the present invention, in which FIG. 1 is a partially sectional front view of the main parts of the device, FIG. 2 is a front perspective view of a vehicle window equipped with the device, and FIG. 3 is a front perspective view of a vehicle window equipped with the device. 4 is a partially sectional side view of the main part of the device, FIG. 4 is a partially sectional plan view of the main part of the device seen from below, FIGS. 5 and 6 are front views in partial section of the main part showing the operation of the device, FIG. FIG. 8 is a front perspective view of a vehicle window, and FIGS. 9 to 13 show other embodiments of the present invention.
The figure is a partially sectional front view of the main part of the device, FIG. 10 is a partially sectional side view of the main part of the device, FIG. 11 is a partially sectional plan view of the main part of the device seen from below, and FIGS. 12 and 13 are the installation Fig. 14 is a partially sectional front view of the main part of the apparatus showing roughly another embodiment of the present invention. W...Front window P...Body panel...Drive motors 3A, 3B...Link mechanism 33...-Drive link 34... - Intermediate link 35... Driven link 321.351... Support shaft 341... Rotating shaft 4A, 4B... Wiper arm 5... Rotation Shaft drive means 51, 52, 53...Gear 54...Chain Fig. 4

Claims (5)

[Claims] (1) Wiper arm (4A), (4B) rotation axis (34
1) is moved by link mechanisms (3A) and (3B), the link mechanisms (3A) and (3B) are moved by a support fixed to the body by a drive motor (1). A drive link (33) that is reciprocated about a shaft (321), an intermediate link (34) whose one end is connected to the tip of the drive link (33), and the support shaft (32).
1) and a driven link (35) rotatably supported by a supporting shaft (351) fixed to a different body and having its tip connected to the other end of the intermediate link (34),
341) to each of the above links (33), (34), (35)
It corresponds to the relative rotation of the links (33), (34), (35) provided with the rotating shaft (341) and the links (33), (34), (35) connected thereto. A wiper device for a vehicle, characterized in that a rotary shaft driving means (5) for rotating the rotary shaft (341) is provided. (2) A connecting shaft is fixedly erected at the tip of the driving link, and the intermediate link is connected to the connecting shaft, and the rotating shaft is provided on the intermediate link, and the rotating shaft driving means is configured by a plurality of gears. A wiper device for a vehicle according to claim 1, wherein the connecting shaft and the rotating shaft are connected by these gears. (3) A wiper device for a vehicle according to claim 2, wherein the rotating shaft is provided at the other end of the intermediate link, and the driven link is connected to the rotating shaft so as to be relatively rotatable. (4) A connecting shaft is fixedly erected at the other end of the intermediate link, and the driven link is connected to this, and the driven link is provided with the rotating shaft, and the rotating shaft driving means is connected to a plurality of gears. A wiper device for a vehicle according to claim 1, wherein the connecting shaft and the rotating shaft are connected by these gears. (5) A wiper device for a vehicle according to claim 2 or 4, wherein the rotary shaft driving means includes a chain installed between the gears.