JP5777729B2 - Window glass wiper device - Google Patents

Description

  The present invention is a window glass wiper device particularly for a rear window glass wiper of an automobile, and includes a wiper motor, and the wiper motor operates an output for operating a wiper lever via a transmission unit housed in a transmission unit casing. The shaft unit is driven, and the transmission unit has a transmission unit for converting the rotational movement of the wiper motor into a swinging rotational movement of the output shaft, and the transmission unit includes the transmission unit. The present invention relates to a window glass wiper device that is supported in a device casing via a plurality of support locations.

Such window glass wiper devices are generally known. In particular, in the rear window glass wiper motor, the support location of the transmission is realized in the transmission casing by a screwed support pin and a through-opening having a press-fitted round bearing. Therefore, the structure of such a transmission casing is very complicated. Furthermore, in order to manufacture the transmission casing, it is necessary to manufacture a plurality of tools specialized for a wide variety of transmission types.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a window glass wiper device in which a transmission casing can be manufactured more easily and inexpensively and can be used more flexibly, that is, flexibly.

DISCLOSURE OF THE INVENTION This object is based on the present invention, wherein the support location is formed on a support plate inserted in or insertable into the transmission casing, position fixed in the transmission casing or position fixable. It is solved by being.

Advantages of the Invention In other words, by providing separate bearing plates, it is achieved that the transmission casing may have one and the same basic structure for different transmission types. The bearing plate can be adapted to various transmission types to be inserted without changing the outer dimensions by forming a plurality of bearing points individually. Thereby, an injection molding tool (mold) for the transmission device casing can be manufactured remarkably easily, and the transmission device casing is based on means for obtaining the internal structure of the transmission device casing by changing the support plate. Is required only one injection-molding tool having a significantly simpler structure than the prior art.

  Advantageously, the bearing plate is inserted into the transmission casing such that at least one wall portion of the transmission casing forms an abutment surface for positioning and / or locking the bearing plate within the transmission casing. May be. As a result, it is no longer necessary to provide a positioning nose for inserting the support plate in the transmission casing, so that the variety of parts is reduced. On the other hand, on the basis of the contact surface, the force action brought about by the transmission device on the support plate during the operation of the wiper motor is absorbed through the contact surface of the wall portion of the transmission device casing. This contributes to avoiding damage to the support location of the support plate based on the possibility of the force deviating.

  As an alternative or in addition, at least one positioning nose may be provided in the transmission casing for positioning the bearing plate.

  A particularly accurate positioning can be achieved by the support plate being formed so as to follow the contour of the inner wall on the side of the transmission casing. In the sense of the present invention, “along the contour” means that the outer surface of the bearing plate substantially matches the inner contour of the transmission casing. This can be realized very simply, for example, by injection molding so as to surround the periphery of the support plate, whereby the support plate is fixed in position in the transmission casing.

  The support location that replaces the support pin provided in the transmission casing may be formed by a plurality of support pins provided on the support plate, for example.

  One means of providing these support pins on the support plate is obtained by forming the support pins on the support plate by deep drawing. Of course, it is also possible to screw the bearing pin into the bearing plate, glue it to the bearing plate, or select another position fixing type known in the prior art, for example brazing, welding and similar types.

  In another configuration, the support plate is provided with a cutout portion into which a sintered bearing for supporting the output shaft can be inserted.

  Sintered bearings can be constructed as stably as possible to prevent the round bearings from loosening or coming off from the support plate, and to ensure high precision between the support points even under high load. In order to be able to do so, it is advantageous to select the stiffness of the plate so that it can absorb the forces generated. This can be achieved, for example, by a plate with sufficient wall thickness and a suitable material.

  In another configuration, the transmission is a conversion transmission, the conversion transmission having a connecting rod, a web pivotally coupled to the connecting rod, and a worm gear driven via a wiper motor. The web has a tooth segment formed integrally with the web at an equal interval (that is, meshing is maintained) with respect to a pinion coupled to the output shaft so as not to rotate relative to the output shaft. The worm gear and the tooth segment are accommodated in the transmission casing via bearing pins formed on the bearing plate, respectively.

In order to produce a window glass wiper device according to the present invention, the present invention proposes a method having the following method steps:
-Punch out the support plate to form a cutout for the output shaft support location,
-In order to install the transmission device, a plurality of support pins are formed on the support plate by deep drawing.
-Injection molding so as to surround the periphery of the support plate to form a transmission casing;
-Insert the transmission into the transmission casing.

  In order to form a particularly stable bearing point for the sintered bearing, the bearing plate is provided with a cut-out part that can be press-fitted with a perfect circle bearing for the output shaft. Can be inserted into the support location of the support plate. The perfect circular bearing may be a sintered bearing, for example.

  For further advantageous configurations of the invention, reference is made to the description of the attached drawings and to the dependent claims.

1 is a partial perspective view of a conventional window glass wiper device. 1 is a partial perspective view of a conventional window glass wiper device. It is the figure which looked at the support plate by this invention provided with two support locations from the top. FIG. 4 is a cross-sectional view taken along a cross-sectional line AA of the support plate shown in FIG. 3.

Embodiments Embodiments of the invention are described in detail below with reference to the drawings.

  1 and 2 show a partial perspective view of a window glass wiper device 1 for a rear window glass wiper of an automobile based on the prior art.

  The window glass wiper device 1 has a wiper motor 2. The wiper motor 2 drives an output shaft 4 through a transmission device unit housed in a transmission device casing 3, and the wiper lever is driven through the output shaft 4. (Not shown) can reciprocate on the windshield of the automobile.

  In order to convert the rotational movement of the wiper motor 2 into the swinging rotational movement of the output shaft 4, the transmission device unit has a conversion transmission device 5 in the illustrated embodiment. The conversion transmission device 5 includes a connecting rod 6 and a tooth segment 8 that is connected to the connecting rod 6 via a support pin 7 in a pivotal manner. The tooth segment 8 is arranged at a distance from the rotational axis of the output shaft 4, is rotatably supported in a stationary manner in the transmission casing 3 via a removable bearing pin 9, and the connecting rod 6. It is connected with the worm gear 10 via the pivot. The tooth segment 8 meshes with a pinion attached to the output shaft 4 so as not to rotate relative to the output shaft 4.

  A force acting on the worm gear 10 or the tooth segment 8, such as a lateral force or a force acting on the output shaft 4, mainly includes a plurality of support pins 9, 9 provided on the transmission device casing 3 or a perfect circular bearing 11. Is absorbed by. This may lead to the bearing pins 9 moving relative to each other, or the perfect circular bearing 11 coming off the transmission casing 3.

  In order to prevent this, the present invention proposes to insert the support plate 12, which is shown in more detail in FIGS. 3 and 4, which is substantially triangular in this embodiment, into the transmission casing 3. To do. In this embodiment, the support plate 12 is manufactured from a steel plate, and has a material thickness corresponding to the generated force. Accordingly, a plurality of support locations 13 formed on the support plate 12 are extremely accurate. Sufficient rigidity of the support plate 12 is obtained to ensure the relative position, in particular under load. The support plate 12 has a wall section rounded in the corner area thereof, and is correspondingly formed so as to follow the contour of the inner wall on the side of the transmission casing 3. The shape of the support plate 12 that conforms to the above-mentioned contour can be completely formed by forming the transmission device casing 3 by injection molding so as to surround the support plate 12 after the support plate 12 is manufactured. Can be expected. In the present embodiment, the support plate 12 is provided with two support locations 13 by deep drawing. Further, the support plate 12 has a cutout portion 14 into which a perfect circular bearing for supporting the output shaft 4, particularly a sintered bearing, can be inserted.

  That is, in order to manufacture the window glass wiper device 1 according to the present invention, first, the support plate 12 is punched to form the cutout portion 14 as a support location for the output shaft 4. Next, a plurality of support pins 13 are formed on the support plate 12 by deep drawing, and the support pins 13 are connected to the transmission device (in this embodiment, the worm gear 10 and the tooth segment of the conversion transmission device in the transmission device casing 3). 8) will be attached. Next, the transmission device casing material is injection-molded so as to surround the periphery of the support plate 12 to form the transmission device casing 3, and the constituent members of the conversion transmission device 5 are incorporated into the transmission device casing 3. Thereafter, a perfect circle bearing for the output shaft 4 is inserted into the cutout portion 14 provided in the support plate 12 for this purpose, and finally, the output shaft 4 is inserted into the perfect circle bearing via the cutout portion 14.

Claims (11)

A window glass wiper device (1) comprising a wiper motor (2), the wiper motor (2) being an output shaft for operating a wiper lever via a transmission device unit housed in a transmission device casing (3) (4) is driven, and the transmission device unit has a transmission device for converting the rotational motion of the wiper motor (2) into the swinging rotational motion of the output shaft (4). In the window glass wiper device (1), the transmission device is supported in the transmission device casing (3) via a plurality of support locations.
The bearing point, the inserted into the drive housing (3), or insertable, is formed in the drive housing (3) Position fixable support plate in (12),
The window glass wiper device , wherein the support plate (12) is formed so as to follow a contour of an inner wall on the side of the transmission device casing (3) .   The bearing plate (3) such that at least one wall portion of the transmission casing (3) forms an abutment surface for positioning and / or fixing the bearing plate (12) within the transmission casing. 12. The window glass wiper device according to claim 1, wherein 12) is inserted into or can be inserted into the transmission casing (3).   The window glass wiper device according to claim 1 or 2, wherein at least one positioning nose for positioning the support plate (12) is provided in the transmission casing (3). Said support plate (12), said supporting Uketamawaita by injection molding be subjected to surround (12), the drive housing (3) is positionally fixed in, any one of the claims 1 to 3 1 Window glass wiper device according to item. The window glass wiper device according to any one of claims 1 to 4 , wherein the support plate (12) has a plurality of support pins (13) that form support positions of the transmission unit. The window glass wiper device according to claim 5 , wherein the support pin (13) is formed on the support plate (12) by deep drawing. The window according to any one of claims 1 to 6 , wherein the support plate (12) is provided with a cutout (14) into which a sintered bearing for supporting the output shaft (4) can be inserted. Glass wiper device. The transmission includes a connecting rod (6), a tooth segment (8) pivotally coupled to the connecting rod (6), and a worm gear (10) driven via the wiper motor (2). The tooth segment (8) is coupled to the output shaft (4) so as not to rotate relative to the pinion (11) engaged with the tooth segment (8), etc. The worm gear (10) and the tooth segment (8) are arranged at a distance from each other through the two bearing pins (13) formed on the bearing plate (12). The window glass wiper device according to any one of claims 1 to 7 , which is housed in 3). The window glass wiper device (1) according to any one of claims 1 to 8 , wherein the window glass wiper device (1) is for a rear window glass wiper of an automobile. The method of manufacturing a window glass wiper device according to any one of claims 1 to 9 (1),
-Punching the bearing plate (12) to form at least one bearing point (14) for the output shaft (4);
A plurality of support pins (13) are formed on the support plate (12) by deep drawing to attach the transmission device (5);
-Injection molding so as to surround the support plate (12) to form a transmission casing (3);
A method for manufacturing a window glass wiper device (1), characterized in that the transmission device (5) is incorporated into the transmission device casing (3); Furthermore,
-Press-fitting a perfect circle bearing for the output shaft (4);
The method for manufacturing a window glass wiper device (1) according to claim 10 , wherein the output shaft (4) is inserted into the support location (14) of the support plate (12).

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