JP2003146186A - Wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a wiper motor on a pipe frame without using a bolt. SOLUTION: Two-way taking faces 23 are formed on a fixed part 22 of the pipe frame 20 of an integral type wiper device by squeezing a middle part of a round pipe 21, and a columnar holding hole 45 having the same radius as the round pipe 21 and a part of a side surface of which is cut out is formed on a fixed part of the wiper motor. The fixed part 22 of the pipe frame fitted into the holding hole 45 as cut-out parts on the side surfaces of the two-way taking faces 23 are crept into it, and a calked part 24 for whirl-stop and a calked part 25 for cross direction stop to be respectively engaged with a part of a fixed part 37 of the wiper motor are formed on this fixed part 22. It is possible to eliminate fastening of the bolt and to reduce cost of the integral type wiper device as the wiper motor is fixed on the pipe frame by the holding hole into which the fixed part of the pipe frame is fitted and the calked part for whirl-stop and the calked part for cross direction stop.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device mounted on an automobile, and more particularly to a technique for fixing a wiper motor to a pipe frame, for example, a set of wiper motor, wiper arm, pivot shaft, pivot lever, connecting rod and the like. Relates to a technique effectively used for an integrated wiper device integrated (modularized) with a pipe frame.

[0002]

2. Description of the Related Art As a wiper device for an automobile, there is an integrated wiper device in which a set of a wiper motor, a wiper arm, a pivot shaft, a pivot lever and a connecting rod is integrated with a pipe frame. For example,
JP-A-11-278219 and JP-A-2000-
As disclosed in Japanese Patent No. 253611, in the conventional integrated wiper device, the fixed portion of the wiper motor is fastened to the fixed portion of the pipe frame by bolts.

[0003]

However, in the integrated wiper device in which the fixed portion of the wiper motor is fastened to the fixed portion of the pipe frame by bolts, it is difficult to reduce the cost because the number of parts and the number of assembling steps increase. There is a problem that is.

An object of the present invention is to provide a wiper device capable of fixing the fixed portion of the wiper motor to the fixed portion of the pipe frame without using bolts.

[0005]

A wiper device according to the present invention is a wiper device in which a fixed portion of a wiper motor is fixed to a fixed portion of a pipe frame, and the fixed portion of the pipe frame has a two-sided chamfered surface. A middle portion of the pipe is formed by being crushed, and a cylindrical holding hole having a radius substantially equal to that of the round pipe of the pipe frame and a part of a side surface thereof is cut out is formed in a fixed portion of the wiper motor. The fixing portion of the pipe frame is fitted into the holding hole on the two-sided chamfer with the cutout portion hidden therein.

According to the above-mentioned means, since the fixed portion of the wiper motor is fixed by the holding hole in which the fixed portion of the pipe frame is fitted in the fixed portion of the pipe frame, the fastening by the bolt can be omitted.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

In the present embodiment, the wiper device according to the present invention is constructed as an integrated wiper device. That is, as shown in FIG. 1, the integrated wiper device 10 according to the present embodiment has a pair of left and right pivot holders 1.
1 and 11, and left and right pivot holders 11 and 1
1 rotatably supports a pair of pivot shafts 12, 12 to which left and right wiper arms (not shown) are attached, and left and right pivot levers 13, 13 are fixed to the lower ends of both pivot shafts 12, 12, respectively. Has been done. A pair of left and right brackets 14 and 14 are provided on the left and right pivot holders 11 and 11 so as to project outward from each other, and left and right brackets 14 and 14 are provided with left and right mounting holes 15 and 15, respectively. . The wiper device 10 is fixed to the vehicle body by mounting bolts (not shown) inserted through the left and right mounting holes 15, 15. The left and right pivot holders 11, 11 are provided with left and right connecting portions 16, 16 projecting inwardly from each other on the opposite side of the brackets 14, 14, and the left and right connecting portions 16, 16 are respectively connected to a pipe frame 20 described later. It is fitted and fixed to both left and right ends of the. Left and right pivot levers 1
A connecting rod 17 is rotatably installed between the free ends of the pivot levers 3 and 13.
The connecting rod 18 is also rotatably installed between and the output shaft (not shown) of the wiper motor 30.

The pipe frame 20 is provided with a round pipe 21 as a main body, and a fixing portion 22 is formed at an intermediate portion in the longitudinal direction of the round pipe 21. 2 (a), (b)
As shown in FIG. 2, the fixing portion 22 includes two-sided chamfered surfaces 23 and 23 formed by crushing an intermediate portion of the round pipe 21 into an oval-shaped cross section.
Are a pair of flat bearing surfaces facing each other. The wiper motor 3 is attached to the fixing portion 22 of the pipe frame 20.
0 is attached.

The wiper motor 30 is a motor unit 31 as a prime mover unit, and a worm gear speed reducer unit (hereinafter referred to as a speed reducer unit) 3 for reducing the rotation of the rotation shaft of the motor unit 31.
2 and the motor unit 31 and the speed reducer unit 32 are integrally assembled. The reduction gear unit 32 includes a resin-molded cover 33 and a gear frame 34 formed into a bottomed tubular shape by an aluminum die casting method. The cover 33 covers the opening of the gear frame 34 to reduce the speed. A gear box of the device unit 32 is formed. A bracket 35 is formed on the gear frame 34 so as to project therefrom, and a mounting hole 36 is provided at the tip of the bracket 35. The bracket 35 is attached to the brackets 1 of the left and right pivot holders 11 and 11 by a mounting bolt (not shown) inserted through the mounting hole 36.
It is designed to be fastened to the vehicle body together with Nos. 4 and 14.

A fixing portion 37 is integrally formed on the side of the gear frame 34 opposite to the bracket 35 so as to project therefrom. As shown in FIGS. 2 (c) and 2 (d), the fixing portion 37 is left and right. It is formed in a substantially rectangular parallelepiped shape that is long in the direction. A holding groove 38 having a semicircular cross section is recessed in the side surface of the fixed portion 37 opposite to the gear frame 34 so as to extend horizontally in the left-right direction. It is set to be substantially equal to the radius of the round pipe 21. A pair of upper holding part pieces 39, 39 on the left and right sides is provided on one side (hereinafter, referred to as the upper side) of the holding groove 38 at the left and right ends.
The upper holding part pieces 39 are provided so as to project in a direction (hereinafter, referred to as a front direction) at right angles to a plane including the center line of 8.
Upper holding claws 40, 40 project downward from the tip of 39, respectively. The upper holding surface 4 is provided on the holding groove 38 side of the upper holding pieces 39, 39 and the upper holding claws 40, 40.
1 and 41 are respectively formed, and the left and right upper holding surfaces 41 and 41 respectively form extended curved surfaces of the semicircular curved surface of the holding groove 38. A lower holding piece 42 is provided on the lower edge of the central portion of the holding groove 38 so as to project in the front direction of the holding groove 38, and a lower holding claw 43 is provided at the tip of the lower holding piece 42. Is projected upward. A lower holding surface 44 is formed on the holding groove 38 side of the lower holding piece 42 and the lower holding claw 43, and the lower holding surface 44 constitutes an extended curved surface of the semicircular curved surface of the holding groove 38. There is. That is, in the front portion of the fixed portion 37, the holding groove 38, the left and right upper holding surfaces 41, 41, and the lower holding surface 44 form a cylindrical through hole in which a part of the front side surface is cut out. A holding hole 45 that extends horizontally in the left-right direction is formed.

Here, the left and right upper holding part pieces 39, 39 and the central lower holding part piece 42 are set so as not to overlap each other on the plane projection plane. Therefore, in the aluminum die-casting method of the gear frame 34, the die-cutting structure can be prevented from being complicated by the existence of the left and right upper holding pieces 39, 39 and the central lower holding piece 42.

Next, the assembling work of the wiper motor to the pipe frame and its function and effect will be described with reference to FIGS.

First, as shown in FIG. 3, the fixing portion 22 of the pipe frame 20 is inserted into the holding hole 45 of the fixing portion 37 of the wiper motor 30 from the front. During this insertion work, the pipe frame 20 is rotated 90 degrees in advance with respect to the wiper motor 30 so that the fixing portion 22 of the pipe frame 20 can be inserted into the holding hole 45 of the fixing portion 37 of the wiper motor 30. To be done. That is, between the crushed and thinned two-sided chamfers 23 of the fixing portion 22 of the pipe frame 20, the left and right upper holding claws 40 in the holding hole 45 of the fixing portion 37 of the wiper motor 30 are provided.
The narrowed gap is hidden by 40 and the lower holding claw 43.

Next, as shown in FIG. 4, the pipe frame 20 is moved relative to the wiper motor 30 by 9 degrees.
By being rotated by 0 degree, the two-sided chamfered surfaces 23, 23 of the fixed portion 22 of the pipe frame 20 are returned to the vertically extending direction. At this time, since the radius of the inner diameter of the holding hole 45 is set to be substantially equal to the radius of the outer diameter of the round pipe 21 of the pipe frame 20, the pipe frame 20 and the wiper motor 3 are arranged.
It can smoothly rotate relative to 0. This 90
In the state after being rotated once, the narrowed portions of the left and right upper holding claws 40, 40 and the lower holding claw 43 in the fixing portion 37 of the wiper motor 30 are on the outer peripheral surface of the round pipe 21 of the pipe frame 20. Since the upper and lower parts are engaged with each other, the fixing portion 22 of the pipe frame 20 is prevented from coming out forward from the holding hole 45 of the fixing portion 37 of the wiper motor 30.

Subsequently, as shown in FIG. 5, the detent caulking portion 24 as an engaging portion has left and right upper holding claws 40, 40 on the front two-sided take-up surface 23 of the pipe frame 20 and. It is formed at each of three locations facing the lower holding claw 43. The reaction force at the time of caulking these three detent caulking portions 24, 24, 24 is such that the caulking portion 24 of the upper holding claw 40 and the lower holding claw 43 located in opposite directions are crimped. Required for the parts 24. These three swaged parts for detent 2
The fixing portions 22 of the pipe frame 20 and the fixing portion 37 of the wiper motor 30 are prevented from moving (rotating) in the circumferential direction by 4, 24 and 24.

Further, as shown in FIG. 5, a lateral stopping caulking portion 25 serving as an engaging portion is opposed to the right end of the left upper holding claw 40 in the fixing portion 22 of the pipe frame 20. , And a portion facing the left end of the right upper holding claw 40, respectively. The reaction force of the left and right lateral-direction crimping portions 25, 25 during the crimping is required for the left and right crimping portions 25, 25. These left and right lateral caulking portions 25, 25
As a result, the fixed portion 22 of the pipe frame 20 and the fixed portion 37 of the wiper motor 30 are in a state of being prevented from moving (rotating) in the lateral direction.

As described above, according to the present embodiment, the fixed portion 37 of the wiper motor 30 is fixed to the pipe frame 2.
Holding hole 45 in which the fixed portion 22 of the pipe frame 20 is fitted into the fixed portion 22 of 0, and the upper portion of the fixed portion 37 of the wiper motor 30 is held in the fixed portion 22 of the pipe frame 20 fitted in the holding hole 45. Rotation preventing caulking portion 24 formed so as to engage with the claws 40, 40 and the lower holding claw 43, respectively, and the left and right upper holding part pieces 39, 39.
Since they can be fixed to each other by the lateral direction caulking portions 25, 25 formed so as to engage with each other from both sides in the left-right direction, fastening by bolts can be omitted. That is, since the fixed portion of the wiper motor can be fixed to the fixed portion of the pipe frame without using bolts, it is possible to reduce the number of parts and the number of work steps.
The cost of the integrated wiper device and thus of the vehicle can be reduced.

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

For example, depending on the conditions of the die of the aluminum die casting method, the upper holding piece and the lower holding piece, which are respectively provided on the upper and lower side edges of the holding groove, respectively, are the left and right holding pieces. It is not limited to the structure in which the plane projection plane does not overlap with the central holding piece, but may be formed vertically symmetrical.

[0021]

As described above, according to the present invention,
Since the fixing portion of the wiper motor can be fixed to the fixing portion of the pipe frame without using bolts, the manufacturing cost of the wiper device and thus the automobile can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a wiper device according to an embodiment of the present invention.

2A is a front view showing a fixed portion of a pipe frame, FIG. 2B is a side sectional view taken along line bb of FIG.
(C) is a front view showing a fixed portion of the wiper motor, and (d) is a side sectional view taken along line d-d.

3A and 3B show an assembling work of the wiper motor to the pipe frame, FIG. 3A is a front view showing the fixed portion of the pipe frame after being inserted into the fixed portion of the wiper motor, and FIG. It is a side surface sectional view which meets the -b line.

FIG. 4A is a front view showing the fixed portion of the pipe frame after being rotated by the fixed portion of the wiper motor, and FIG. 4B is a side sectional view taken along the line bb of FIG.

FIG. 5 (a) is a front view showing the fixed portion of the pipe frame after being caulked to the fixed portion of the wiper motor;
(B) is a side sectional view taken along the line bb of (a), and (c) is a plan sectional view taken along the line cc of (a).

[Explanation of symbols]

10 ... Integrated wiper device (wiper device), 11 ... Pivot holder, 12 ... Pivot shaft, 13 ... Pivot lever, 14 ... Bracket, 15 ... Mounting hole, 16 ... Connection part, 17 ... Connecting rod, 18 ... Connecting rod, 20 ... Pipe frame, 21 ... Round pipe, 2
2 ... Fixing part, 23 ... Two-way chamfer, 24 ... Rotating swaged caulking part (engaging part), 25 ... Lateral direction swaging caulking part (engaging part), 30 ... Wiper motor, 31 ... Motor part, Three
2 ... Worm gear reduction gear unit, 33 ... Cover, 34 ... Gear frame, 35 ... Bracket, 36 ... Mounting hole, 37 ...
Fixed part, 38 ... Holding groove, 39 ... Upper holding piece, 40 ... Upper holding claw, 41 ... Upper holding surface, 42 ... Lower holding piece, 4
3 ... Lower holding claw, 44 ... Lower holding surface, 45 ... Holding hole.

Claims (4)

[Claims] 1. A wiper device in which a fixed part of a wiper motor is fixed to a fixed part of a pipe frame, and a two-sided chamfer is formed on the fixed part of the pipe frame by crushing an intermediate part of a round pipe. In the fixing portion of the wiper motor, there is formed a cylindrical holding hole having a radius substantially equal to that of the round pipe of the pipe frame and a side surface of which is cut out, and the fixing portion of the pipe frame is A wiper device, wherein a two-sided chamfer is fitted in the holding hole with the cutout part hidden therein. 2. The holding hole has a holding groove having a semicircular cross section, which is formed on one side surface of a fixed portion of the gear frame, and has a semicircular cross section substantially the same as that of the round pipe. Holding pieces on both sides, holding claws projecting in directions opposite to the tips of the holding pieces on both sides, and a half circle of the holding groove on the holding groove side of these holding pieces and holding claws. The wiper device according to claim 1, wherein the wiper device comprises a holding surface formed so as to form an extended curved surface of the curved surface. 3. The wiper device according to claim 2, wherein the holding pieces on both sides are set so as not to overlap each other on a projection surface. 4. The fixing part of the fitted pipe frame is formed with an engaging part that engages with a part of the fixing part of the wiper motor. Wiper device.