JP3516046B2 - Vehicle wiper pivot device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wiper pivot device having a wiper frame rotatably supporting a pivot shaft for performing a wiper operation and fixed to a vehicle body panel.

[0002]

2. Description of the Related Art As a pivot device for a vehicle wiper of this type, both ends of a metal frame of a wiper frame are provided.
It is known that a resin-made pivot holder made separately from this frame is fixed. Since this pivot holder has a shaft hole, the pivot shaft is inserted and supported in the shaft hole, and is screwed to the vehicle body panel by means of a vehicle body panel fixing means such as a stud bolt also provided in the pivot holder. The pivot shaft is rotatably supported, and the pivot shaft is reciprocally rotated by the rotational power of the wiper motor connected to the link via one end of the pivot shaft. Therefore, the other end of the pivot shaft is rotated. The wiper arm coupled to the side swings reciprocally on the wiping surface, and the wiper blade coupled to this wiper arm rotates reciprocally while being in pressure contact with the wiping surface by the arm spring built into the wiper arm.
Wipe the wiping surface back and forth with the wiper blade.

Further, as a structure different from the above structure,
There has been one in which the frame and the pivot holder of the wiper frame are integrally formed of metal, and one in which the frame and the pivot holder are integrally formed of resin.

[0004]

In the above-described vehicle wiper pivot device, in the case where the resin pivot holders are fixed to both ends of the pipe-shaped frame of the wiper frame, the strength of the joint portion is ensured. In order to prevent loosening of the frame and the pivot holder, it is necessary to rivet-fasten and crimp-fasten, respectively, which requires a lot of man-hours for rivet-fastening and crimp-fastening, which makes mass production difficult. .

Further, in a vehicle wiper pivot device in which the frame of the wiper frame and the pivot holder are integrally formed of metal, the overall weight can be large, which is against the weight reduction of the vehicle and is not practical. ,
In the vehicle wiper pivot device in which the frame of the wiper frame and the pivot holder are integrally molded of resin,
Even if a filler is added, it is difficult to secure the strength, and the frame becomes larger, such as the frame becoming larger,
This too lacked practicality.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle wiper pivot device which is light in weight, has a simple structure, and can reduce the number of steps.

[0007]

[Constitution of the invention]

[0008]

According to a first aspect of the present invention, there is provided a vehicle wiper pivot device which is made of a metal material.
Ri, a frame having a cylindrical portion formed in a cylindrical shape, is fixed to an end portion of the frame, and Pibottohoru da fixed to a vehicle body panel of a vehicle, rotatably supported by the pivot holder, the driving of the wiper motor According to the predetermined range
In a pivot device for a vehicle wiper having a pivot shaft that reciprocally rotates around an enclosure , the frame includes a tubular portion
With a crushed part formed in a plate shape by crushing the end
And, this is the潰部has a large shaft guide hole is provided than the outer diameter of said pivot shaft, said pivot holder has a shaft support portion for supporting the pivot shaft rotatably fixed to the vehicle body panel The body-side fixed part to be mounted and a part of the tubular part of the frame and a crushed part covering the crushed part.
The frame is formed integrally with the rudder body by resin.
Is coupled to, it is characterized in that it has a structure in which the bearing of the shaft supporting portion inserted through the shaft guide hole formed in the潰部is formed.

[0009] In the pivot device for a vehicle wiper according to claim 2 of the present invention, in addition to the configuration of claim 1, wherein the vehicle
Body side fixing part is formed by protruding from the holder body in a bifurcated shape
The feature is that it is configured as described above.

According to a third aspect of the present invention, there is provided a wiper pivot device for a vehicle, comprising a frame to which a wiper motor is attached and a pivot holder fixed to an end portion of the frame and fixed to a vehicle body panel of the vehicle. In a pivot device for a vehicle wiper, which includes a frame and a pivot shaft that is rotatably supported by the pivot holder and that is reciprocally rotated in a predetermined range by a drive of the wiper motor through a link mechanism, , a cylindrical shape, a cylindrical portion which the wiper motor is fixed, the end of the cylindrical portion is made of a metal pipe having a潰部formed is crushed in a plate shape, wherein the潰部of the frame and large shaft guide hole is provided than the outer diameter of the pivot shaft, said pivot holder, the rotary self said pivot shaft A shaft supporting portion for supporting the front
The body side fixing part fixed to the body panel and the frame
The holder body that covers a part of the cylinder and the crushed part is made of resin.
Is integrally formed and joined to the frame,
The shaft of the shaft support part is inserted through the shaft guide hole.
It is characterized by having a structure in which a bridge is formed .

[0011] In the pivot device for a vehicle wiper according to claim 4 of the present invention, in addition to the configuration of claim 3, wherein the vehicle
Body side fixing part is formed by protruding from the holder body in a bifurcated shape
The feature is that it is configured as described above.

[0012]

In the pivot device for a wiper for a vehicle according to the present invention, the frame made of a metal material has a cylindrical tubular portion to which the wiper motor is fixed, and a plate-like member formed at the end of the tubular portion. And a crushed part. Then,潰部large shaft guide hole than the outer diameter of the pivot shaft is provided in, the pivot holder has a shaft support portion for supporting the pivot shaft rotatably, the vehicle body side fixing portion fixed to the vehicle body panel , Part of the tubular part of the frame
And the holder body that covers the pickled part are integrally molded with resin.
Is coupled to the frame and is inserted through the shaft guide hole formed in the crushed portion to form the bearing of the shaft support portion. Therefore, the frame and the pair of pivot holders can be coupled without loosening without the need for rivet fixing or caulking, and the weight does not become large.

[0013]

1 to 4 show an embodiment of a vehicle wiper pivot device according to the present invention.

The pivot device 2 of the vehicle wiper shown in the figure
Reference numeral 0 includes a frame 2 to which a wiper motor 12 serving as a drive source can be attached via a motor bracket 5, and a pair of pivot holders 3 and 4 which are fixed to both ends of the frame 2 and can be fixed to a vehicle body panel of a vehicle (not shown). The wiper frame 1 and the pivot shafts 7 and 8 which are rotatably supported by the pair of pivot holders 3 and 4 and which are reciprocally rotated in a predetermined range by a wiper motor 12 through a link mechanism described later. Have. Pivot shaft 7, 8
A wiper arm (not shown) is fixed to one end of the wiper arm, and a wiper blade (not shown) is attached to the other end of the wiper arm.

The wiper motor 12 includes a motor bracket 5
Fixed to. One end of a motor arm 13 is connected to the output shaft 12a of the wiper motor 12.

Of the pair of pivot holders 3 and 4, the first pivot holder 3 rotatably supports the first pivot shaft 7, and the second pivot shaft 4 includes the second pivot shaft 8. Support rotatably.

One ends of the first and second pivot arms 9 and 10 are connected to the first and second pivot shafts 7 and 8, respectively, and the other ends of both the pivot arms 9 and 10 are first.
The link connecting rod 11 is rotatably connected to both ends.

The other end of the motor arm 13 and the other end of the first pivot arm 9 are rotatably connected to both ends of the second link connecting rod 14, respectively.

The second link connecting rod 14, the first pivot arm 9, the first link connecting rod 11, and the second pivot arm 10 form a link mechanism.

The frame 2 is a metal pipe made of a metal material, and has a cylindrical portion 2a having a cylindrical shape from one end to the other end.
The other end side is slightly bent into a dogleg shape, and is formed, the first crushed portion 2b is formed at one end, and the second crushed portion 2c is formed at the other end.

Since the first and second crushed portions 2b and 2c have the same shape, here, the first crushed portion 2b shown in FIG. 4 is used.
Will be described only.

The first crushed portion 2b has a first joining flat surface 2b which is flat by crushing the end portion of the tubular portion 2a.
It is formed in a plate shape having the first and second joint planes 2b2 at opposite positions.

Further, in the substantially central portion of the first crushed portion 2b,
A round hole-shaped shaft guide hole 2b3 communicating with the first and second joint planes 2b1 and 2b2 is bored, and the shaft guide hole 2b3 is a shaft support portion provided in a first pivot holder 3 described later. 3a is arranged concentrically with the shaft support portion 3a, and has an inner diameter larger than the inner diameter of the bearing 3b formed on the shaft support portion 3a. The inner diameter of the bearing 3b is slightly larger than the outer diameter of the first pivot shaft 7.

Further, outside the shaft guide hole 2b3 of the first crushed portion 2b, molding die positioning portions 2b4, 2b5 are formed at two locations near the end of the first crushed portion 2b. These molding die positioning portions 2b4 and 2b5 are
It is used for positioning with respect to the molding die when the first pivot holder 3 described later is molded by resin. In this case, the molding die positioning portions 2b4, 2b5 are formed at two positions outside the shaft guide hole 2b3, but the number is not limited to two, and the number is not limited to one or three.

In the second crushed portion 2c, similarly to the first crushed portion 2b, the first joint plane 2c1 and the second joint plane 2c are formed.
2, shaft guide hole 2c3, mold positioning part 2c
4, having a mold positioning portion 2c5.

Since the frame 2 has a hollow cylindrical portion 2a, the frame 2 itself has strength against bending, but the thickness of the first crushed portion 2b and the second crushed portion 2c is the thickness of the cylindrical portion 2a. Since the thickness is greater than the thickness, the first crushed portion 2b and the second crushed portion 2c have increased rigidity and higher bending strength.

A first pivot holder 3 is integrally molded with the first crushed portion 2b of the frame 2 by resin molding, and
A second pivot holder 4 is integrally molded with the crushed portion 2c.

Since the first pivot holder 3 and the second pivot holder 4 have the same shape, here, FIG.
Only the first pivot holder 3 shown in will be described.

The first pivot holder 3 includes a frame 2
Holder body 3c formed in a substantially cross shape so as to cover the first crushed portion 2b and the end portion of the tubular portion 2a of the frame 2.
Almost inward of the first crushed portion 2b of the frame 2, the first and second joint surfaces 2b1 and 2b2, and the joint surface 3c1 on the side of the pivot holder, which is joined to the ends of the tubular portion 2a of the frame 2. And a bearing 3 having a round hole inside the shaft guide hole 2b3 formed in the first crushed portion 2b of the frame 2.
b is formed. The bearing 3b has a first crushed portion 2b.
Of the shaft guide hole 2b3 of the first pivot holder 3 and the cylindrical shaft support portion 3a formed integrally with the first pivot holder 3 are arranged concentrically. The inner diameter of the bearing 3b is the shaft guide of the first crushed portion 2b. Since it is smaller than the inner diameter of the hole 2b3, the bearing 3b has a predetermined thickness dimension toward the inner circumference of the shaft guide hole 2b3.

In the first pivot holder 3, a vehicle body side fixing portion 3c2 is integrally formed near the end of the holder body 3c. The vehicle body side fixing portion 3c2 is provided on the holder body 3
At the end of c, it projects in a bifurcated shape, and as shown in FIG. 1, a rubber damper 6 is fitted in the center, and a bolt (not shown) is screwed to the vehicle body panel side of the vehicle through this damper 6. .

The first pivot holder 3 is arranged below the first crushing portion 2b and one molding die (not shown) arranged above the first crushing portion 2b of the frame 2 shown in FIG. It is resin-molded by a pair of molding dies of the other molding dies not shown.

At this time, the positioning pin of the other mold is inserted into the molding die positioning portions 2b4, 2b5 provided in the first crushed portion 2b of the frame 2 so that the first crushed portion 2b is molded in the other molding portion. A shaft guide hole 2 which is positioned with respect to the mold and is formed in the first collapsing portion 2b of the frame 2.
The bearing forming convex portion of the other molding die is disposed inside the b3, and from this state, one molding die has the first crushed portion 2b.
Is placed above, and the molds on the other hand are combined,
A resin material is injected inside. After that, the one mold is separated from the other mold, so that the bearing 3b having a predetermined wall thickness dimension toward the inner circumference of the shaft guide hole 2b3 formed in the first crushed portion 2b of the frame 2 is formed. Is formed.

The bearing 3b has an inner diameter dimension and the bearing 3b.
Since a predetermined rotation gap is formed between the first pivot shaft 7 and the outer diameter of the first pivot shaft 7 inserted in b, it is not necessary to dispose a separate component such as metal, and the first pivot shaft 7 is rotated. Can be supported freely.

The bearing 3b of the first pivot holder 3 includes:
As shown in FIG. 3, the first pivot shaft 7 is inserted. One end of the first pivot arm 9 is coupled to the base end of the first pivot shaft 7, and the tip end of the first pivot shaft 7 projects a wiper blade to the outside of a vehicle body panel (not shown). The base end of the wiper arm attached to the tip is screwed.

A spherical ball pin (not shown) is attached to the other end of the first pivot arm 9, and the ball pin is provided at one end of the first link connecting rod 11 (not shown). It is coupled to the ball retainer via a spherical pair. First link connecting rod 11
Has a ball retainer on the other end,
The ball retainer is connected to a ball pin (not shown) attached to the other end of the second pivot arm 10 via a spherical pair.

Similar to the first pivot holder 3, the second pivot holder 4 is also integrated with the shaft support portion 4a, the holder body 4c, the holder side joint surface 4c1, the bearing 4b, and the vehicle body side fixing portion 4c2. Have.

On the other hand, in the motor bracket 5, the frame mounting piece 5 is attached to the plate body 5a having a substantially rectangular plate shape.
Since b, 5c, and 5d are respectively formed to project, these frame attachment pieces 5b, 5c, and 5d are fixed to the tubular portion 2a of the frame 2 by welding.

Bracket body 5a of the motor bracket 5
A wiper motor 12 is attached by screwing a screw 15 substantially at the center. The wiper motor 12 is
Since the output shaft 12a projects from the output shaft insertion hole 5a1 provided in the bracket body 5a, the output shaft 12a
The base end portion of the motor arm 13 is coupled to. A spherical ball pin (not shown) is attached to the tip of the motor arm 13, and the ball pin is attached to a ball retainer (not shown) provided at one end of the second link connecting rod 14 via a spherical pair. Are combined. The second link connecting rod 14 is also provided with a ball retainer at the other end, and this ball retainer is coupled to a ball pin (not shown) provided on the first pivot arm 9 via a spherical pair.

The vehicle wiper pivot device 20 having such a structure has the first wiper frame 1 at both ends thereof.
The vehicle body side fixing portion 3c2 provided in the pivot holder 3 and the vehicle body side fixing portion 4c2 provided in the second pivot holder 4 are fixed to the vehicle body panel below the wiping surface and project from the vehicle body panel. On the pivot shafts 7 and 8 of
The wiper arm equipped with the wiper blade is screwed.

Since the external wiring (not shown) of the wiper motor 12 is electrically connected to the power source through the wiper switch, when the armature built in the wiper motor 12 is energized by turning on the wiper switch, this armature is turned on. Starts rotating, the output shaft 12a rotates by the rotation of the armature. When the output shaft 12a of the wiper motor 12 rotates, the motor arm 13 also rotates, so that the second link connecting rod 14
By rotation of the motor arm 13 via the, the four-bar rotation chain mechanism composed of the first pivot arm 9, the first link connecting rod 11, and the second pivot arm 10 operates, and the first and second The pivot arms 9 and 10 reciprocally rotate within a predetermined range, the first and second pivot shafts 7 and 8 reciprocally rotate, and the first and second pivot shafts 7 and 8 are attached to the outside of the vehicle body panel. Since the wiper arm screwed by is swung on the wiping surface, the wiping surface is wiped while the wiper blade is pressed against the wiping surface by the arm spring built in the wiper arm.

While the wiper motor 12 is energized, the wiper blade wipes the surface to be wiped.
The wiper frame 1 in which the pivot holders 3 and 4 are integrally molded with resin is joined to the frame 2 without looseness by the first and second pivot holders 3 and 4, and the first and second pivot shafts 7 and 8 are formed. To be supported by the vehicle body panel side.

[0042]

As described above, according to the pivot device for a vehicle wiper of the present invention, the frame made of a metal material has a cylindrical tubular portion to which the wiper motor is fixed, and the tubular portion of the tubular portion. A crushed portion formed in a plate shape is provided at the end portion. The crushed portion is provided with a shaft guide hole larger than the outer diameter of the pivot shaft, and the pivot holder has a shaft support portion for rotatably supporting the pivot shaft and a vehicle body side fixed portion fixed to the vehicle body panel. ,
A holder body for covering a part of the tubular portion of the frame and the pickled portion;
Is integrally molded with resin and coupled to the frame, and the shaft guide hole formed in the crushed portion is inserted to form the bearing of the shaft support portion. Therefore, the frame and the pair of pivot holders can be joined without loosening without the need for rivets or caulking, and the weight does not become large. Therefore, it has an excellent effect that it is lightweight and has a simple structure, and the number of steps can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a vehicle wiper pivot device according to the present invention.

FIG. 2 is a rear view of the wiper frame used in the vehicle wiper pivot device shown in FIG.

3 is a partially cutaway plan view of a pivot holder portion of the vehicle wiper pivot device shown in FIG. 1. FIG.

FIG. 4 is an external perspective explanatory view of a frame in the vehicle wiper pivot device shown in FIG. 1.

[Explanation of symbols]

1 wiper frame 2 frames 2a tube 2b (collapsed portion) First crushed portion 2b3 Shaft guide hole 2b4 Mold positioning part 2b5 Mold positioning part 2c (crushed part) second crushed part 2c3 shaft guide hole 2c4 Mold positioning part 2c5 Mold positioning part 3 (Pivot holder) First pivot holder 3a Shaft support 3b bearing 3c2 Body side fixed part 4 (Pivot holder) Second pivot holder 4a Shaft support 4b bearing 4c2 Body side fixed part 7 (Pivot shaft) 1st pivot shaft 8 (Pivot shaft) Second pivot shaft 9 (Link mechanism) 1st pivot arm 10 (Link mechanism) Second pivot arm 11 (Link mechanism) First link connecting rod 12 Wiper motor 13 motor arm 14 (Link mechanism) Second link connecting rod 20 Vehicle wiper pivot device

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takahiro Furuya 1760, Higashimatano-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture Automotive Electric Industry Co., Ltd. (56) Bibliographical reference 4-19357 (JP, U) Flat 2-64461 (JP, U) Actual development Sho 63-162126 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60S 1/00-1/68

Claims (4)

(57) [Claims] 1. A tubular portion made of a metallic material and formed into a tubular shape.
With a frame, and fixed to the end of this frame,
And Pibottohoru Da fixed to a vehicle body panel of a vehicle, the rotatably supported on the pivot holder, the pivoting device of the wiper for a vehicle having a pivot shaft for reciprocating rotation of the predetermined range by the drive of the wiper motor, The frame is formed by crushing the end portion of the tubular portion.
It has a plate-shaped crushed part, and the crushed part is provided with a shaft guide hole larger than the outer diameter of the pivot shaft.
Is and, the pivot holder has a shaft support portion for supporting the pivot shaft rotatably, and the vehicle body side fixing portion fixed to the vehicle body panel, the cylinder of the frame
Part of the part and the holder body that covers the crushed part are integrated with resin
Being coupled to the frame are formed in the pivot device for a vehicle wiper, characterized in that the bearing of the shaft supporting portion inserted through the shaft guide hole formed in the潰部is formed. 2. The vehicle body side fixing portion is provided so as to extend from the holder body.
The pivot device for a vehicle wiper according to claim 1, wherein the pivot device is formed so as to project in a shape . 3. A frame to which a wiper motor is attached,
A wiper frame having a pivot holder fixed to the end of the frame and fixed to a vehicle body panel of the vehicle,
In a pivot device for a vehicle wiper, which is rotatably supported by the pivot holder and has a pivot shaft that is reciprocally rotated within a predetermined range by a drive of the wiper motor through a link mechanism, the frame is tubular. And a tubular portion to which the wiper motor is fixed and a metal pipe having a crushed portion formed by crushing an end portion of the tubular portion into a plate shape, and the crushed portion of the frame includes the pivot shaft of the pivot shaft. the outer diameter is provided with a large shaft guide hole than said pivot holder has a shaft support portion for supporting the pivot shaft rotatably, and the vehicle body side fixing portion fixed to the vehicle body panel, the frame Tube
Of the holder body that covers a part of the
Is formed and joined to the frame, the shuffling
Through the guide hole to form the bearing of the shaft support
A wiper pivot device for a vehicle, which is characterized in that 4. The vehicle-body-side fixing portion is provided so as to extend from the holder body.
The pivot device for a vehicle wiper according to claim 3, wherein the pivot device is formed so as to project in a shape .