JPS6246744A - Wiper motor - Google Patents

Abstract

PURPOSE:To make it possible to cope with the difference in both attachment positions and attachment methods to the motor vehicle by forming a space having an opening for communicating with the outside air and located between a housing and a motor fitting base thereby forming a breather for communicating the outside and inside of the housing with each other. CONSTITUTION:Within a housing 2 of a wiper motor 1 is arranged a motor 5 the torque of which is transmitted from a rotary shaft 6 via gear transmission means 7-9, an arm 10 and a bell-crank to a drive shaft 4 projecting through a cover 3 to the outside. In a constitution described above, a space 2b is arranged outside a motor fixing base 2a of the housing 2 and the bottom 2c of the housing 2 is provided with an opening 2d communicating with the inside of the housing 2, with the opening 2d equipped on its outside with an arc-like protuberance. A breather is formed with a fixing base 11a and a breathing duct 11b both to be inserted into the opening 2d.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Field of Industrial Application) This invention relates to a wiper motor used in a headtemp wiper device for removing dirt from, for example, a headlamp of an automobile.

(Prior art) Conventionally, in headlamp wiper devices that wipe the surface of automobile headlamps to remove dirt, wiper motors are fixed at symmetrical positions on or near the sides of each left and right headlamp. However, there has been a device in which the wiper motor rotates a wiper blade via a link, and the blade of the wiper blade wipes the surface of the headlamp to remove dirt from the headlamp.

The wiper motor used in the headlamp wiper device is shown in FIG. 6. FIG. 6 is a perspective view of the wiper motor 100, and FIG.
FIG.

In the figure, a wiper motor 100 has a rectangular parallelepiped housing 101 covered with a cover 102 to seal it, and a protruding drive shaft 103 is attached to the cover 1.
02 and is provided therethrough.

A motor 104 is provided in the housing 101, and a worm gear 10 is connected to an electric T-shaft 105 of the motor 104.
6 is press-fitted. This worm gear 106 is in mesh with the large diameter gear portion 107a of the two-stage intermediate gear 107, and the small-diameter gear portion 107b of the two-stage intermediate gear 107.
is in mesh with the large gear 108. A crank pin 108a is provided on a part of the circumference of the large gear 108, and is pivotally connected to the - end of the arm 109.

The other end of the arm 109 is pivotally connected to a bell crank (not shown) provided on the drive shaft 103 on the inner surface of the cover 102.

Therefore, the rotation of the motor 104 is caused by the rotation of the worm gear 10
The transmission is transmitted through the large diameter gear portion 107a, the small diameter gear portion 107b, and the large gear 108 of the intermediate gear 107 of the 6th and 2nd stage, and is converted into a rotational motion of the drive shaft 103 via the bell crank. The wiper blade is configured to rotate via a link (not shown) provided at 103.

Further, the housing 101 and the cover 102 of the wiper motor 100 are closely attached as described above, and the motor 1
04 and gears 106, 107, and 108, a breather 120 is provided so that breathing can be performed without absorbing water when the temperature rises. (Jitsukai 57-15
(Refer to Publication No. 5603) This breather 120 has a cover 1
A duct 110 that is a part of 02 and projects outside the wiper motor 100 and communicates between the inside and outside of the wiper motor 100.
It is formed by attaching a tube 111 to the tube 111.

The wiper motor 100 is configured as described above, and is fixed to the sides of the left and right headlamps or a nearby panel (generally a radiator core support or headlamp panel) via a bracket 112, and a breather 120 is attached to the duct 110. The tube 111 hanging downwardly connects the inside and outside of the wiper motor 100.

(Problem to be Solved by the Invention) However, in the above-described wiper motor 100, the mounting location is on the side or near the steering lamp, which is a very important location in the design of the vehicle. There are often space constraints due to the
tact 110 and tube 111 to wiper motor 1
In some cases, it was not possible to obtain enough space to protrude outward from 00, resulting in a low degree of freedom in terms of layout. It is also conceivable to form the breather 120 by providing the duct 110 on the side wall of the housing 101, but when installing the wiper motor 100 symmetrically, the installation of the tact 110 depends on the position of the left and right parts, which may require separate production and parts assembly. There are various problems such as an increase in the number of variations, which can lead to problems such as incorrect installation.
Development of new technology was desired.

The purpose of this invention was to solve the various problems of the conventional wiper motor described above, and to provide a wiper motor that is inexpensive and has a structure that can be adapted to the position and method of mounting on an automobile. Our goal is to provide the following.

[Structure of the Invention] (Means for Solving the Problems) A wiper motor according to the present invention includes a motor and a gear in a housing, and a breather that communicates the inside of the housing with outside air. 5. A space having a notch that communicates with the outside air is formed between the housing and the motor fixed pace, and a breather is formed on the space forming surface of the housing.

(Embodiment) FIGS. 1 to 4 are diagrams for explaining an embodiment of a wiper motor according to the present invention, and FIG. 1 is a cutaway front view of the wiper motor.

The wiper motor 1 is constructed by covering a rectangular parallelepiped housing 2 with a cover 3 and closing it completely, and includes a protruding drive shaft 4 passing through the cover 3.

A motor 5 is provided in the housing 2, and the motor 5
A worm gear 7 is attached to the electric machine r/shaft 6 in the correct size.

This worm gear 7 is a large diameter gear portion 8 of a two-stage intermediate gear 8.
The small diameter gear portion 8b of the two-stage intermediate gear 8 is in mesh with the large gear 9. A crank pin 9a is provided on the circumference of the large gear 9, and is pivotally connected to one end of the arm 10. The other end of the arm 10 is pivotally connected to a bell crank (not shown) provided on the drive shaft 4 on the inner surface of the cover 3.

As described in L, the wiper motor 1 is configured, and the rotation of the motor 5 is transmitted via the worm gear 7, the large diameter gear part 8a of the two-stage intermediate gear 8, the small diameter gear part 8b, and the large gear 9, and then the bell crank is transmitted. This is converted into a rotational movement of the drive shaft 4 through a link (not shown) provided on the drive shaft 4, which rotates a wiper blade that wipes away the hendrap 1-.

Also, the housing 2 and cover 3 of the wiper motor 1
As mentioned above, the wiper motor 1 is in close contact with each other and is isolated from the outside.However, when the temperature rises due to the wiper motor 1's operation, the housing 2 is designed to absorb water without absorbing it. A space 2b is provided in a part of the outer part of the motor fixing base 2a, and the bottom surface 2C of the space 2b is
is provided with an opening 2d that communicates with the inside of the housing 2, and an arc-shaped surrounding protrusion 2 is provided on the outside of the opening 2d.
a fixed base lla provided with f and inserted into the opening 2d;
A breather 11 is formed by the breather 11 and the breathing duct) llb.

Hereinafter, the breather 11 will be explained in more detail based on FIGS. 2 to 4.

In the figure, a part of the outer part of the motor fixing base 2a of the housing 2 has a notch 2f having the same surface as the bottom surface 2C.
A space portion 2b is provided. An opening 2d that communicates with the inside of the housing 2 is provided at the - section on the bottom surface 2C of the space 2b, and an arc-shaped opening in the direction of the notch 2f is provided on the outside of the opening 2d. A surrounding protrusion 2e is provided. The breather 11 is provided inside this surrounding projection 2e, and as shown in FIGS. 3 and 4,
1 → part 11C, where the opening diameter of the opening 2d provided on the bottom surface of the housing 2 and the outside diameter are approximately the same, and 1 on the bottom surface.
A fixing part 11 that is fixed to the hinge and has a larger opening diameter than the above-mentioned opening diameter.
A fixed base 11a with d and lle is inserted into the insertion hole 11f of this fixed base 11a, and -1- is fitted with the fixed base lla at the lower fixed part 11g and llh, and a lip is attached to a part of the fixed base 11a. The breather 11 is formed by the breathing duct 11b provided with the lli.

In this embodiment, the bracket 12 is used to connect the motor fixing base 2a of the wiper motor 1 and the space 2b.
with the bracket 12 covered and fixed with screws etc.
With the mounting bolt shade provided in [1 (F stage for mounting on the body side), it is also possible to directly fix to the vehicle body so as to close off the space 2b without using the bracket 12 as the first stage of mounting. It is.

With the above configuration, when the temperature rises due to the operation of the wiper motor 1, it is possible to smoothly breathe with the outside air via the breather 11, and the space 2b is blocked by the bracket 12 or the vehicle body, etc. except for the small notch 2e. Surrounding protrusion 2e
By providing this, it is possible to prevent water, etc. from directly entering from the outside.

FIG. 5 is a diagram showing another embodiment of the wiper motor according to the present invention.

On this real flow side, the notch 2 of the refracted space 2b
This figure shows a case in which the arrow f is provided at a position opposite to that of the embodiment shown in FIG. 2, and an arcuate surrounding protrusion 2e is provided opening in the direction of the notch 2f.

As mentioned above, the wiper motor 1 is installed on the side of or near the left and right headlamps, so the opening directions of the notch 2f and surrounding protrusion 2e are adjusted at the resin molding stage in order to accommodate the difference in the left and right mounting positions. By distinguishing between the positions shown in FIG. 2 and the positions shown in FIG. 5, various mounting methods can be accommodated.

[Effects of the Invention] As explained above, the wiper motor according to the present invention includes a motor and a gear in the housing,
In the wiper motor including a breather that communicates between the inside of the housing and the outside air, a space having a notch that communicates with the outside air is formed between the housing and the motor fixing base, and a space forming surface of the housing is provided with a space forming a space. Since the structure includes a breather, it is possible to deal with differences in the mounting position and mounting method on the automobile, and it is also possible to reduce the number of parts and cost. In addition, it is possible to prevent the tube from coming off or being crushed when transporting parts, thereby improving and stabilizing the quality.

The tube is assembled in a process, and there is no need to determine the position or direction of the tube, which has the advantage of simplifying the process and preventing incorrect assembly.

[Brief explanation of drawings]

1 is a cutaway front view of one embodiment of the wiper motor according to the present invention, FIG. 2 is a perspective view illustrating a breather portion of the wiper motor shown in FIG. 1, and FIG. 3 is a breather portion of the wiper motor shown in FIG. 1. 4 is a sectional view of the wiper motor shown in FIG. 1, and FIG.
6 is a perspective view illustrating a breather portion of another embodiment of a wiper motor according to the present invention, FIG. 6 is a perspective view illustrating a conventional wiper motor, and FIG. 7 is a cutaway front view of FIG. 6. DESCRIPTION OF SYMBOLS 1... Wiper motor, 2... Housing, 2a... Motor fixing base, 2b... Space, 2f... Notch, 5... Motor, 7.8.8a, 8b, 9. - Gear, 11... Breather. Patent Applicant: Nissan Motor Co., Ltd. Applicant: Automobile Tram Industry Co., Ltd., Attorney-at-Law
Small Salt Fyo Fig. 2 1, / 11d 11C11e 111 11h Fig. 5

Claims (1)

[Claims] (1) In a wiper motor that includes a motor and gears in a housing and a breather that communicates between the inside of the housing and the outside air, a space that has a notch that communicates with the outside air between the housing and the motor fixing base. A wiper motor characterized in that a breather is formed on a space forming surface of the housing.