JP2009194995A - Electric motor unit and wiper system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise and vibration sufficiently by utilizing in the wiper motor unit or the wiper system of an automobile. <P>SOLUTION: In a wiper motor comprising a motor section, a transmitter for transmitting the rotation of the motor section while decelerating, a bracket 14 fixed to the transmitter, three fixing portions 15 provided on the bracket 14, and a cylindrical rubber mount 20 provided at each fixing portion 15, a plurality of protrusions 25 are arranged in the shape of a lattice on the surface 24 of the rubber mount 20 touching a rear panel 30. Not only noise and vibration are not transmitted easily, but also stability of the rubber mount is enhanced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an electric motor device and a wiper device. In detail, it is related with the attachment structure of an electric motor apparatus and a wiper apparatus.
For example, the present invention relates to a technique that is effective when used in a wiper motor device or a wiper device of an automobile.

In general, when an electric motor device is installed on a fixed body, a bracket in which the electric motor is assembled is sandwiched between intermediate portions of a rubber mount, and the rubber mount is screwed to the fixed body.
That is, it is devised to reduce the noise and vibration by absorbing the noise and vibration generated when the electric motor is operated by the rubber mount. For example, see Patent Document 1.
JP-A-11-332168

  However, the conventional electric motor mounting structure has a problem in that noise and vibration cannot be sufficiently reduced because the contact area between the rubber mount fixed body and the bracket is large.

  An object of the present invention is to provide an electric motor device and a wiper device that can sufficiently reduce noise and vibration.

Typical means for solving the above-described problems are as follows.
(1) a motor;
A bracket for fixing the motor to a fixed body;
A rubber mount attached to the bracket;
In the electric motor device that fixes the rubber mount in contact with one surface of the rubber mount,
The rubber mount includes a plurality of convex portions on a contact surface to be fixed to the fixed body.
(2) The electric motor device according to (1), wherein the plurality of convex portions are arranged at regular intervals on the mounting surface of the rubber mount.
(3) The electric motor device according to (1) or (2), wherein the rubber mount includes the plurality of convex portions on a pair of end surfaces.
(4) a pivot shaft to which a wiper arm is connected at one end;
A pivot holder that houses the pivot shaft and is fixed to the vehicle body;
A link coupled to the other end of the pivot shaft;
A rod connected to the link;
An electric motor connected to the rod and transmitting a rotational force to the wiper arm;
In a wiper device having
The wiper device, wherein the rubber mount attached to the pivot holder has a plurality of convex portions on a contact surface on the vehicle body fixed side.
(5) The wiper device according to (4), wherein the rubber mount has the plurality of convex portions arranged at regular intervals.
(6) The wiper device according to (4) or (5), wherein the rubber mount includes the plurality of convex portions on a pair of end surfaces.

According to (1), since the rubber mount has a plurality of convex portions, the area of the contact surface with the fixed body is reduced, so that it is difficult to transmit noise and vibration.
According to the above (2), by arranging a plurality of convex portions at regular intervals, the convex portions are evenly pressed when contacting the rubber mount and the fixed body, and the pressing load becomes uniform. Not only makes it difficult to communicate, but also improves the stability of the rubber mount.
According to the above (3), by providing the plurality of convex portions on the pair of end surfaces, the directionality for mounting the rubber mount is not specified, and the rubber mount can have versatility.
According to (4), since the rubber mount has a plurality of convex portions on the contact surface on the vehicle body fixed side, the area of the contact surface with the fixed body is reduced, so that it is difficult to transmit noise and vibration.
According to the above (5), by arranging a plurality of convex portions at regular intervals, the convex portions are evenly pressed when contacting the rubber mount and the vehicle body, and the pressing load becomes uniform. Not only will it be difficult to convey, it will also improve the stability of the rubber mount.
According to the above (6), the rubber mount is provided with a plurality of convex portions on the pair of end surfaces, so that the direction of mounting the rubber mount is not specified, and the rubber mount can have versatility. .

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 to 3 show a wiper motor according to a first embodiment of the present invention.
In this embodiment, the electric motor device according to the present invention is configured as a wiper motor. As shown in FIG. 1, the wiper motor 10 includes a motor unit 11, a transmission device 13 that decelerates the rotation of the motor unit 11, converts it into a swing motion, and transmits it to a wiper shaft 12 as an output shaft, and a transmission device 13 and a bracket 14 attached to 13.
The transmission device 13 includes a transmission mechanism unit that transmits the rotational force of the motor unit to the output shaft, and a bottomed transmission mechanism housing unit that is connected to the motor unit 11 and houses the transmission mechanism unit.
The protruding end portion of the wiper shaft 12 from the transmission device 13 is configured to support the base end portion of the wiper arm in a fixed manner, and a wiper blade for wiping the rear windshield glass is provided at the free end portion of the wiper arm. It can be attached.

As shown in FIG. 1, the bracket 14 is formed in a shallow dish shape having a substantially triangular shape in plan view, and the motor unit 11 and the transmission device 13 are installed on the bracket 14.
Here, the bracket 14 is configured to cover the opening portion of the transmission mechanism housing portion.
As shown in FIG. 1, three attachment portions 15, 15, 15 are respectively provided at three corners of the triangle of the bracket 14 so as to project at right angles to the bottom, and the three attachment portions 15 are provided. , 15 and 15 are arranged in substantially the same plane.

  Since the three attachment portions 15, 15, and 15 are configured substantially the same, the configuration will be described with reference to FIG.

As shown in FIG. 2, the attachment portion 15 includes an attachment hole 16 having a slit formed by pressing.
A rubber mount 20 formed in a substantially cylindrical shape is fitted into the mounting hole 16 from a slit, and the rubber mount 20 is made of rubber or resin which is a molding material having elasticity.
A collar 19 is inserted into the inner peripheral surface of the rubber mount 20, and the collar 19 is made of a material having high mechanical strength such as metal and is formed in a cylindrical shape having a smaller diameter than the outer diameter of the rubber mount 20. Yes.
The bolt 17 is inserted through the washer 18 into the insertion hole 21 of the rubber mount 20 and the insertion hole of the collar 19.
By adopting such a configuration, the collar 19 maintains vibration between the bracket 14 and the counterpart mounting portion (for example, the rear panel) of the mounting portion 15, and the vibration generated by the operation of the wiper motor 10 is caused by the counterpart mounting portion (rear panel). It can be suppressed by the rubber mount 20.

As shown in FIGS. 2 and 3, the rubber mount 20 is provided with a holding portion 22 that holds the bolt 17 on the inner peripheral surface of the insertion hole 21 so as to protrude inward in the inner diameter direction.
The cross-sectional shape of the holding portion 22 is formed in a trapezoidal shape that becomes narrower as it goes inward, and the tip end portion is set so as to contact the outer periphery of the bolt 17.
As shown in FIG. 3, the holding portion 22 is formed in a trapezoidal plate shape concentrically bent with the rubber mount 20 in plan view, and the three holding portions 22 are intermittently spaced in the circumferential direction. Are arranged.

As shown in FIG. 2, with the bolt 17 inserted in the insertion hole 21 of the rubber mount 20, the end of the holding portion 22 is in the groove (between the valley and the valley) in the male screw portion of the bolt 17. Since the holding portion 22 can hold the bolt 17 by abutting against the pin 17a, the bolt 17 can be reliably held in a state of being prevented from coming off.
Incidentally, the wiper motor 10 is supplied from the wiper motor manufacturer to the automobile manufacturer with the bolt 17 held by the holding portion 22.
Then, in the automobile manufacturer, the wiper motor 10 is disposed at a predetermined portion of the rear panel near the rear windshield glass, and the bolts 17 at the three attachment portions 15 of the bracket 14 are referred to by imaginary lines in FIG. As described above, the nut 31 is fixed to the rear panel 30 in advance.

  As shown in FIGS. 2 and 3, the rubber mount 20 includes a plurality of convex portions 25 on the contact surface 24 with the rear panel 30 as a fixed body. The plurality of convex portions 25 are arranged at regular intervals. That is, the plurality of convex portions 25 are arranged in a lattice shape vertically and horizontally.

  In the wiper motor 10 configured as described above, the wiper motor 10 is disposed at a predetermined portion of the rear panel in the vicinity of the rear windshield glass, and the bolts 17 at the three attachment portions 15 of the bracket 14 are imaginary lines in FIG. , The nut 31 is fixed to the rear panel 30 in advance.

  In the wiper motor 10 in which the three mounting portions 15 of the bracket 14 are interposed by the rubber mount 20 and fastened by the bolts 17 and the nuts 31, vibration generated by the operation of the motor portion 11 is transmitted to the rear panel 30 side. Since the three rubber mounts 20 prevent the phenomenon, noise generation can be suppressed.

By the way, the rubber mount becomes easier to transmit vibration to the fixed body as the area of the contact surface with the fixed body (vehicle body or rear panel) becomes larger, and it becomes difficult to transmit the vibration as the area of the contact surface becomes smaller.
Therefore, it is conceivable to make it difficult to transmit vibration by forming the rubber mount in a truncated cone shape and reducing the area of the contact surface with the fixed body of the rubber mount.
However, with this means, since the rubber mount is deformed, the outer peripheral region of the frustoconical portion is not evenly contacted with the fixed body. It becomes unstable.

In the present embodiment, since the rubber mount 20 includes the plurality of convex portions 25, the area of the contact surface with the rear panel 30 is reduced, so that it is difficult to transmit noise and vibration.
Moreover, in the present embodiment, by arranging the plurality of convex portions 25 in a lattice shape at regular intervals, the convex portions 25 are evenly pressed when the rubber mount 20 and the rear panel 30 are in contact with each other, and the pressing load is uniform. Therefore, the rubber mount 20 can be prevented from tilting.
That is, according to the present embodiment, not only is it difficult to transmit noise and vibration, but also the stability of the rubber mount 20 can be improved.
Moreover, the rubber hardness (elastic force) in the contact surface with the rear panel 30 of the rubber mount 20 can be adjusted by increasing / decreasing the size (length / width / depth and depth) and the number of the plurality of convex portions 25.

4 and 5 show a wiper device according to another embodiment of the present invention.
In the present embodiment, the wiper device according to the present invention is configured as a pipe-type module wiper device.
As shown in FIG. 4, the pipe-type module wiper device 40 includes a pair of pivot holders 41 and 41 on the left and right. The left and right pivot holders 41 and 41 rotatably support a pair of pivot shafts 42 and 42 to which left and right wiper arms (not shown) are attached, respectively. 43 and 43 are fixed, respectively.
The left and right pivot holders 41, 41 are provided with a pair of left and right brackets 44, 44 projecting outward from each other, and the left and right brackets 44, 44 are provided with left and right mounting holes 45, 45, respectively. Yes. Rubber mounts 50 and 50 are mounted in the left and right mounting holes 45 and 45, respectively.
A connecting rod 46 is rotatably mounted between the free ends of the left and right pivot levers 43, 43. A connecting rod 47 is also provided between one pivot lever 43 and an output shaft (not shown) of the wiper motor 10. Is installed rotatably.
Accordingly, the wiper motor 10 constitutes a drive source that performs a rotational motion, and the pivot lever 43 and the connecting rods 46 and 47 constitute a link that converts the rotational motion of the drive source into a swing motion. The pivot shaft 42 constitutes a shaft that is swingably connected to the link.

This embodiment is different from the above embodiment in that the rubber mount 50 is attached to the bracket 44 of the pivot holder 41. That is, as shown in FIG. 5, the rubber mount 50 is attached to the bracket 44 of the pivot holder 41 with the annular groove 56 formed in the central portion of the outer periphery being fitted into the mounting hole 45.
In the rubber mount 50, a holding portion 52 that holds the bolt 17 is provided on the inner peripheral surface of the insertion hole 51 so as to protrude inward in the inner diameter direction. The front end portion of the holding portion 52 is in contact with the groove 17 (between the valleys) 17 a in the male screw portion of the bolt 17.

  The pipe-type module wiper device 40 configured as described above is disposed at a predetermined portion of the cowl near the front windshield glass, and the bolts 17 in each bracket 44 are referred to by imaginary lines in FIG. And screwed into a nut 31 fixed in advance to the cowl 30A.

  In the pipe-type module wiper device 40 in which the bracket 44 is interposed by the rubber mount 50 and fastened by the bolt 17 and the nut 31, the phenomenon that the vibration generated by the operation of the wiper motor 10 is transmitted to the cowl 30A side is mounted on the rubber mount. 50 can prevent noise generation.

Also in this embodiment, since the rubber mount 50 includes a plurality of convex portions 55 arranged in a lattice shape in the vertical and horizontal directions on the contact surface 54 with the vehicle body, the following operational effects similar to those of the above-described embodiment are obtained.
(1) Since the rubber mount has a plurality of convex portions, the area of the contact surface with the rear panel becomes small, so that it is difficult to transmit noise and vibration.
(2) By arranging a plurality of convex portions in a grid pattern at regular intervals, the convex portions are pressed evenly when the rubber mount and the rear panel are in contact with each other, and the pressing load becomes uniform. Can be prevented.
(3) Not only is it difficult to transmit noise and vibration, but also the stability of the rubber mount can be improved.
(4) The rubber hardness (elastic force) at the contact surface of the rubber mount with the vehicle body (cowl, rear panel) can be adjusted by increasing / decreasing the size (vertical / horizontal and depth) and the number of the plurality of convex portions.

  Needless to say, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

For example, the plurality of convex portions are not limited to being provided on one of the pair of end surfaces of the rubber mount, and may be provided on both of the pair of end surfaces.
By providing a plurality of convex portions on the pair of end faces of the rubber mount, the directionality when the rubber mount is attached is not specified, so that the rubber mount can have versatility.

  The plurality of convex portions are not limited to be arranged in a lattice shape vertically and horizontally on the end surface of the rubber mount, but may be arranged concentrically.

The convex portion is not limited to a quadrangular shape in plan view, but may be formed in a polygonal shape such as a triangle, pentagon, and hexagon, or a circular shape.
The convex portion is not limited to a prismatic shape, and may be formed in a cylindrical shape, a truncated cone shape, a truncated pyramid shape, or the like.

  The collar is not limited to being inserted into the rubber mount, but may be insert molding, or may be formed integrally with the fixed body or the vehicle body.

Although the wiper motor has been described in the first embodiment, the present invention can be applied to all electric motors.
In the second embodiment, the pipe-type module wiper device has been described. However, the present invention can be applied to all wiper devices.

It is a perspective view which shows the wiper motor which is one embodiment of this invention. It is sectional drawing which follows the II-II line | wire of FIG. 1 which shows the detail of an attaching part. The rubber mount is shown, (a) is a perspective view, (b) is a front view, (c) is a plan view, and (d) is a bottom view. It is a perspective view which shows the wiper apparatus which is other embodiment of this invention. It is sectional drawing which follows the VV line | wire of FIG. 4 which shows the detail of an attaching part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Wiper motor (electric motor), 11 ... Motor part, 12 ... Wiper shaft, 13 ... Transmission apparatus,
14 ... Bracket, 15 ... Mounting part,
16 ... mounting hole, 17 ... bolt, 18 ... washer, 19 ... collar,
20 ... rubber mount, 21 ... insertion hole, 22 ... holding part, 24 ... contact surface, 25 ... convex part,
30 ... Rear panel, 31 ... Nut,
DESCRIPTION OF SYMBOLS 40 ... Pipe type module wiper apparatus (wiper apparatus), 41 ... Pivot holder, 42 ... Pivot shaft (shaft), 43 ... Pivot lever, 44 ... Bracket, 45 ... Mounting hole, 46, 47 ... Connecting rod (link),
DESCRIPTION OF SYMBOLS 50 ... Rubber mount, 51 ... Insertion hole, 52 ... Holding part, 54 ... Contact surface, 55 ... Convex part, 56 ... Circular groove.

Claims (6)

A motor,
A bracket for fixing the motor to a fixed body;
A rubber mount attached to the bracket;
In the electric motor device for fixing one surface of the rubber mount in contact with the mounting surface of the fixed body,
The rubber mount includes a plurality of convex portions on a contact surface to be fixed to the fixed body.   The electric motor device according to claim 1, wherein the plurality of convex portions are arranged at regular intervals on a mounting surface of the rubber mount.   The electric motor device according to claim 1, wherein the rubber mount includes the plurality of convex portions on a pair of end surfaces. A pivot shaft to which a wiper arm is connected at one end;
A pivot holder that houses the pivot shaft and is fixed to the vehicle body;
A link coupled to the other end of the pivot shaft;
A rod connected to the link;
An electric motor connected to the rod and transmitting a rotational force to the wiper arm;
In a wiper device having
The wiper device, wherein the rubber mount attached to the pivot holder has a plurality of convex portions on a contact surface on the vehicle body fixed side.   The wiper device according to claim 4, wherein the plurality of convex portions are arranged at regular intervals on a mounting surface of the rubber mount.   The wiper device according to claim 4, wherein the rubber mount includes the plurality of convex portions on a pair of end surfaces.

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