JPS642849Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rear wiper used in an automobile.

In recent years, many types of automobiles, such as passenger cars and van-type trucks, are equipped with rear wipers, and are designed to improve visibility through the rear glass when driving in the rain.

Furthermore, in pick-up vehicles where the rear body, or so-called cover top, is located behind the cab, it is desirable to have such a rear wiper in order to improve visibility through the rear glass when driving in the rain. It is becoming rarer.

However, for cars whose rear glass can be raised and lowered, due to the car body structure, the rear glass
The mounting position of the wiper motor tends to be restricted.

That is, if the pivot shaft of the rear wiper is located on the lower side of the rear glass, the wiper motor will has to be placed between the rear window and the outer panel of the tailgate, resulting in the width of the tailgate being extremely thick and thus allowing the wiper motor to Placing it at the gate was not desirable due to the structure of the vehicle body.

In addition, the pivot shaft of the rear wiper is placed above the rear glass, that is, near the roof panel, and the wiper motor is placed near the pivot shaft. When the crank arm of a motor is connected to its pivot shaft via a link, the interior space of the rear body tends to be narrowed due to the wiper motor, link, etc. If you place the wiper motor and its pivot shaft close together and make the length of the link extremely short, the rotation angle of the pivot shaft will become smaller, and as a result, the wiper blade will There was a tendency for the range to be wiped out to be narrower.

Furthermore, the conventional rear wiper
The motor and pivot shaft are independent, i.e. when installing the rear wiper,
The wiper motor and pivot shaft are each installed independently on the vehicle body side of the vehicle, and then the wiper motor's crank arm and its pivot shaft are connected with a link.・Wiper installation work tended to become extremely complicated.

The purpose of this invention was to miniaturize the wiper drive system, alleviate restrictions on the installation position of the wiper drive system, and obtain a sufficient wiping angle to improve visibility on the rear glass when driving in the rain. To,
Suitable for pickup trucks and van-type trucks with a rear body.
Rear wiper used in automobiles that minimizes the narrowing of the rear body cabin space due to the installation of the wiper drive system even when the wiper drive system is placed near the panel. It is provided by.

With these issues in mind, the wiper used in automobiles of this invention has a wiper motor located near the pivot shaft, and a crank arm attached to the crank shaft of the wiper motor is connected to the pivot shaft via a link. The bracket supports the wiper motor and pivot shaft, respectively, and the distance between the shafts of the crankshaft and the pivot shaft is
The configuration is set to 6 to 10 times the effective length of the arm.

Hereinafter, preferred specific examples of the rear wiper used in an automobile according to this invention will be described with reference to the drawings.

1 to 11 show a pick-up 10 to which a rear wiper 28 of this invention is applied for use in an automobile.

The rear wiper 28 applied to the pick-up 10 has a wiper motor 31 disposed near the pivot shaft 30.
A crank arm (not shown) attached to the crankshaft (not shown) of the reduction gear 32 of No. 1 is connected to its pivot shaft 30 via a link rod 35, and the bracket 36 is The wiper motor 31 and the pivot shaft 30 are each supported, and the distance between the shafts of the crankshaft and the pivot shaft 30 is equal to or greater than 6 of the effective length of the crank arm.
In this way, the drive system of the rear wiper 28 is made into a unit, and the drive unit 29 is attached to the rear body 14 of the pickup 10.

The pick up 10 is the rear body 14
Continuing behind the cab 11, the loading platform 1
2, and its rear body 14 is also
Roof panel 15, pair of side panels 1
6, 17, a rear panel 18 with a rear window frame 45, and hollow side and rear roof rails 19, 20 and 21, which are also raised and lowered along the rear window frame 45. As shown in FIG. Pivot shaft 3
The wiper motor cover 27 is formed on the inner surface of the rear roof rail 21 near 0, and the wiper motor cover 27 cooperates with a part of the space inside the rear roof rail 21 opened by the box opening 25. a rear wiper motor box 26, and a drive unit 29 of the rear wiper 28 is arranged in the wiper motor box 26. I have to.

Also, the rear glass 22 has its wiper
During operation of the motor 31, the pick-up 10 is wiped by the wiper blade 60, and in addition, the pick-up 10 is wiped by the lift-up disposed on the outer side of the rear roof rail 21 in the rear body 14.・The guide 62 and its lift-up guide 6 when the wiper 28 is not in use.
2 on the cam surface 63 of the wiper blade 60 to separate the wiper blade 60 from the rear glass 22.
A slider 72 is provided on the side of the wiper blade 60, and the wiper blade 60 is configured not to interfere with the elevation of the rear glass 22 when the wiper 28 is not in use.

That is, the pick-up 10 forms a box opening 25 on the inner surface of the rear roof rail 21, and the wiper motor 31 is inserted into the rear roof rail 21 from the box opening 25.
The wiper motor 3 is partially contained in the wiper motor 3.
By covering the wiper motor 1 with the wiper motor cover 27, the wiper motor 31 can protect the rear
The amount of inward protrusion of the body 14 is minimized, and the above-mentioned lift-up guide 62 and slider 72 ensure that the wiper blade 60 is retracted when the wiper 28 is not in use. The rear glass 22 is configured to move up and down smoothly.

The rear body 14 is made of synthetic resin,
Roof panel 15, pair of side panels 1
6, 17, and a rear panel 18. Those panels 15, 16, 17, 18
are assembled and glued together, and the roof panel 15 and the pair of side panels 1
Hollow side roof rails 19 and 20 are connected to the roof panels 1 and 17.
Similarly, hollow rear roof rails 21 are formed at the connecting portions between the rear roof rails 5 and the rear panel 18, respectively.

That is, when assembling a pair of side panels 16, 17 on both sides of the roof panel 15, the upper edges of the pair of side panels 16, 17 are attached to the inner surface of the roof panel 15. By adhering the edges on both sides of the panel 15 to the outer surfaces of the side panels 16 and 17, side roof rails 19, 20 are formed respectively.

In addition, there is a rear panel behind the roof panel 15.
When assembling the panel 18, the upper edge of the rear panel 18 is glued to the inner surface of the roof panel 15, and the rear edge of the roof panel 15 is glued to the outer surface of the rear panel 18. As a result, a rear roof rail 21 is formed at the connection portion between the roof panel 15 and the rear panel 18. In this case, the edges on both sides of the rear panel 18 are connected to the side panels 16,1.
7, and also its side panels 16,
The rear edges of the panels 17 are respectively adhered to the outer surfaces of the rear panel 18, and hollow supports (not shown) are formed at the connecting portions between the rear panel 18 and the side panels 16 and 17, respectively. ing.

Therefore, when the rear body 14 is assembled with the roof panel 15, the pair of side panels 16, 17, and the rear panel 18 as described above, the hollow side roof rails 19 , 20, a rear roof rail 21, and a pillar, respectively, so that sufficient strength is obtained and the loading platform 1 of the pick-up 10 is
2, which is suitable as a so-called cover top.

Of course, at approximately the center position of the pair of side panels 16 and 17 on the rear body 14,
As shown in FIG. 1, side window glasses 23 and 24 are installed, respectively.

Further, the rear panel 18 of the rear body 14 is attached to the tail of the pick-up 10.
A rear window frame 45 is formed for the rear glass 22 which is arranged to be movable up and down on the gate 13, and the rear window frame 45 includes:
A channel frame 47 with a glass run 46 fitted inside is attached.

The box opening 25 is formed at approximately the center of the inner surface of the rear roof rail 21 in the rear body 14, and is located near the pivot shaft 30 of the rear wiper 28 and the wiper motor 3.
1 and the link mechanism 33 are partially housed within the rear roof rail 21 through the box opening 25. That is, the box opening 25 serves as the drive unit 29 in the rear wiper 28, and the pivot shaft 30 and the wiper motor 31 are integrated by the bracket 36, and the pivot shaft 30 and the wiper motor 31 are integrated with each other by the bracket 36. The connecting link mechanism 33 can be easily accommodated in the rear roof rail 21 through the box opening 25.

Of course, a through hole 41 for passing the pivot shaft 30 therethrough is formed at approximately the center of the outer surface of the rear roof rail 21 (see FIGS. 2 and 5).

The wiper motor cover 27 has its rear roof opening opened by its box opening 25.
It is arranged on the inner side of the rear roof rail 21 so as to cooperate with a part of the space in the rail 21 to form a wiper motor box 26 (see FIGS. 2 and 3). ).

In other words, the wiper motor cover 27 covers the drive unit 29 partially protruding slightly from the box opening 25 on the inner side of the rear roof rail 21. It is arranged on the inner side of the rear roof rail 21.

The drive unit 29 housed within the wiper motor box 26 includes a pivot shaft 30, a wiper motor 31, and the pivot shaft 3, as can be seen from FIGS.
0 and its wiper motor 31, and a bracket 36 that integrally supports its pivot shaft 30 and wiper motor 31.

That is, in the bracket 36, the pivot shaft 30 is rotatably supported on one side, the wiper motor 31 is fixed on the other side, and the wiper motor 31 and the pivot shaft 30 are connected by a link mechanism 33. It is connected with.

The wiper motor 31 is configured substantially the same as a wiper motor with a rise mechanism used in existing fully concealed wipers, and is designed to obtain a predetermined wiping angle during normal operation. In addition to rotating the pivot shaft 30, when the wiper is not in use, the pivot shaft 30 is configured to stop the wiper blade 60, which will be described later, at a position beyond the normal wiping folding position. This makes it possible to change the rotation angle of the

The wiper motor 31 is also connected to its bracket 36, as seen in FIGS. 3 and 4.
When the drive unit 29 is installed in the rear roof rail 21 through the box opening 25, the amount of protrusion from the inner surface of the rear roof rail 21 is reduced. I have to.

The link mechanism 33 is connected to the wiper motor 3
1, a crank arm (not shown) attached to the shaft of the reducer 32, a pivot shaft side link 34 attached to the pivot shaft 30, and the crank arm and the pivot shaft side link 34. It is composed of a connecting link rod 35. A cross link is used for the pivot shaft side link 34, and the rotation angle of the pivot shaft 30 driven by the wiper motor 31 is increased to obtain a sufficient wiping angle.

Further, in the link mechanism 33, the distance between the shaft of the reducer 32 of the wiper motor 31 and the pivot shaft 30 is set to 6 to 10 times the effective length of the crank arm, in other words. If so, the length of the link rod 35 is set to 5 to 9 times the effective length of the crank arm, and the drive unit 29 is made compact and configured to provide a sufficient wiping angle. has been done.

In such a drive unit 29, the shaft of the reducer 32 of the wiper motor 31 is projected outside the bracket 36 and the crank arm is attached to the shaft, and
Since the pivot shaft side link 34 attached to the pivot shaft 30 is located inside the bracket 36, an opening 37 is formed at approximately the center of the bracket 36, and the opening 37 is connected to the crank arm. A link rod 35 connecting the pivot shaft side link 34 is passed through the opening 37.

The drive unit 29 configured as described above is
The pivot shaft 30 is connected to a through hole 41 formed on the outer surface of the rear roof rail 21.
It is housed in the rear roof rail 21 through the box opening 25 so as to pass through the rear roof rail 21.

In this case, in the drive unit 29, the wiper motor 31 and the pivot shaft 3
The bracket 36 supporting the
It is bolted to the inner surface of the roof rail 21.

Of course, when bolting the bracket 36 to the inner surface of the rear roof rail 21,
A metal clip 44 is attached to the portion of the rear roof rail 21 that is tightened on the inner surface to prevent damage to the rear roof rail 21 due to bolt tightening.

Such bolting shall be performed on the bracket 36.
Flanges 38, 39, 4 on both sides and on the upper side of
is done in each part of 0.

Also, when bolting the upper flange 40 to the inner surface of the rear roof rail 21, the stay 42 for the wiper motor cover 27 is also fixed to the rear roof rail 21 at the same time. There is.

The upper part of the wiper motor cover 27 is attached to the stay 42 using fasteners 48 at the pivot shaft 30 side, as shown in FIG. As shown in FIG. 3, the side part is attached to the stay 43 fixed to the reducer 32 of the wiper motor 31 using a fastener 49, and the lower part of the cover 27 is attached to the bracket 36. It is installed.

Of course, the wiper motor cover 27 is attached to cover the drive unit 29.
, the edge of the cover 27 is slightly spaced from the inner surface of the rear roof rail 21.

Therefore, the wiper motor cover 27 is
Since it is not directly attached to the rear roof rail 21 side but directly attached to the drive unit 29 side, when the drive unit 29 is vibrated by the drive of the wiper motor 31, The wiper motor cover 27 also vibrates integrally with the drive unit 29, and even if the gap between the drive unit 29, especially the wiper motor 31, and the wiper motor cover 27 is extremely small, the Wiper motor cover 27
interference with its drive unit 29 is avoided.

In other words, if the wiper motor cover 27 is attached directly to the rear roof rail 21, the wiper motor 3
1 vibration, it is not necessary to separate the wiper motor cover 27 from the wiper motor 31 by a predetermined distance;
The cover 27 can be placed close to its wiper motor 31, and in extreme cases it can even be brought into contact with its wiper motor 31, and its rear body 1
By arranging the drive unit 29, it is possible to reduce the amount of inward protrusion of the rear body 14 without reducing the decorative effect within the rear body 14.

Further, the pivot shaft 30 in the drive unit 29 described above is connected to the rear roof rail 2.
A sliding pivot holder 50 is disposed between the pivot shaft 30 and the through hole 41 on the outer surface of the pivot shaft 30 (see FIG. 5).

The pivot holder 50
The basic configuration includes a sleeve 51 that is fitted around the shaft 30 and is passed through the through hole 41 and has a flange 52 at the inner end, and a nut 53 that is screwed into the outer end of the sleeve 51. , furthermore, the flange 52
and a pair of washers 54, 55 and a pair of packings 56, 57 arranged between the nut 53 and the nut 53.

Further, an O-ring groove 78 is formed on the outer periphery of the pivot shaft 30 near the tip, and an O-ring 79 is fitted into the O-ring groove 78.

Furthermore, the flange 52 of the sleeve 51 is
It is desirable to provide an extended stopper bar 80 on the side of the bracket 36;
The bar 80 is fitted into a guide hole 81 formed in the bracket 36 so as to be able to slide back and forth, allowing the sleeve 51 to slide in the axial direction and restricting its rotation.

With the pivot holder 50 so configured, the pivot shaft 30 can be attached to the rear roof.
To rotatably support the outer surface of the rail 21,
The sleeve 51 through which the washer 54 and packing 56 have been passed is passed through the pivot shaft 30 in advance, and when the drive unit 29 is installed,
Connect the sleeve 51 to the rear roof rail 2.
1 through the through hole 41. Next, the packing 57 and the washer 55 are passed through the sleeve 51 from the outside of the rear roof rail 21, and further,
A nut 53 is tightened on the end of the sleeve 51.

When the nut 53 is tightened, since the rear roof rail 21 is on the fixed side, the flange 52 of the sleeve 51 is drawn toward the nut 53, and the flange 52 and the nut 53 are tightened.
It is clamped to the rear roof rail 21 by. At that time, the sealing property between the through hole 41 and the sleeve 51 is determined by the packing 56,
57 and its sleeve 51
The seal between the pivot shaft 30 and the pivot shaft 30 is maintained by the O-ring 79.

Therefore, the above-mentioned drive unit 29 is
The sliding pivot holder 50 ensures that the pivot holder 50 remains stable even if the distance between the drive unit 29 and the outer surface of the rear roof rail 21 changes during installation on the roof rail 21 due to variations in the distance between the drive unit 29 and the outer surface of the rear roof rail 21. - The shaft 30 is rotatably and securely supported on the outer surface of the rear roof rail 21, and the pivot shaft 30
Maintains high sealing performance around the area.

A wiper arm 58 having an arm piece 59 at its tip is attached to the pivot shaft 30, and a wiper blade 60 is attached to the end of the arm piece 59.

Further, the above-mentioned pick-up 10 separates the wiper blade 60 from the rear glass 22 when the rear wiper 28 is not in use, and
A lift-up guide 62 and a slider 72 are provided as means for storing the wiper blade 60 on the outer side of the rear roof rail 21.

The lift-up guide 62 is made of synthetic rubber and includes a cam surface 63 having a lift-up surface 64 and a flat surface 65 continuous with the lift-up surface 64.

Also, on the flat surface 65, the lift
An inverted U-shaped protrusion 66 is integrally formed around the periphery except for the part on the up surface 64 side, and the lift and
Stopper surfaces 67 and 68 are formed on both edges of the protruding portion 66 on the up surface 64 side, respectively.

Furthermore, bolt holes 69 are formed in the flat surface 65. Of course, the lift-up guide 62 is molded from synthetic rubber, so a hard synthetic resin or metal washer 71 is fitted into the bolt hole 69 to protect the area around the bolt hole 69 when tightening the bolt. It is desirable to avoid extreme deformation and cracking.

The lift-up guide 62 configured as described above is bolted to a predetermined position on the outer surface of the rear roof rail 21.

Of course, the lift-up guide 62 has a positioning protrusion 70 on the lower surface, and also has a rear
Positioning holes (not shown) are formed in advance at predetermined positions on the outer surface of the roof rail 21, and the protrusions 7
0 into the hole, the lift/
The lift-up guide 62 is easily installed, and the proper orientation of the lift-up guide 62 is maintained.

The slider 72 has a lift-up surface 64 and a flat surface 6 of the lift-up guide 62.
5, and a flange 75 integrally formed at the rear end of the slider body 73 and having an L-shaped cross section and having screw holes 76 and 77. There is.

The slider 72 connects the end of the arm piece 59 fixed to the wiper arm 58 and the clip 6 of the wiper blade 60, as shown in FIG.
It is screwed to the connecting part with 1.

Of course, as mentioned above, the slider 72 is screwed to the connecting part between the end of the arm piece 59 and the clip 61, so new holes must be drilled on the wiper arm 58 and arm piece 59 side. It can be easily attached without reducing the strength of the wiper arm 58 or arm piece 59 without performing any welding or welding.

Also, when the rear wiper 28 is not in use, the slider 72 moves toward the lift-up guide 62.
As a result, the wiper blade 60 is separated from the rear glass 22, and the wiper blade 60 is retracted on the outer side of the rear roof rail 21. The lift-up guide 62 and slider 72 have a 3 to 10
The sliders 72 are associated with each other such that the slider 72 rests on the cam surface 63 of the lift-up guide 62 to initiate lift of the wiper blade 60.

With such a configuration, even if the original wiping angle range is slightly changed due to variations in the installation of the drive unit 29 described above, the slider 72 will maintain its lift angle during normal wiping.
This prevents the wiper blade 60 from coming into contact with the up guide 62 or lifting the wiper blade 60, allowing proper wiping by the wiper blade 60 and secure storage of the wiper blade 60. Become.

Of course, the wiper motor 31 in the drive unit 29 described above is electrically connected to a rear wiper switch (not shown).

Next, the operation of the rear wiper 28 in the above-mentioned pick-up 10 will be explained. First, when the rear wiper switch is de-energized, the slider 72 moves toward the cam of the lift-up guide 62. The wiper blade 60 is placed on a surface 63 and placed in a lifted up position.

If the rear wiper switch is energized, the wiper motor 31 is driven and the wiper
The blade 60 is moved into contact with the rear glass 22 and then performs a normal wiping operation.

Of course, such a wiping operation is performed within a predetermined wiping angle range.

If the rear wiper switch is then de-energized, the wiper blade 60 finishes wiping and the slider 72 adjusts its lift up angle by 3 to 10 degrees beyond the normal wiping angle. The lift-up surface 64 of the guide 62 is contacted (see FIG. 7), and the lift-up of the blade 60 begins.

The slider 72 is connected to the lift-up surface 64.
and then placed on the flat surface 65, the lift of the blade 60 is stopped and the blade 60 is lifted until the flange 75 of the slider 72 hits the stop surfaces 67, 68 of the lift-up guide 62. 60 rotates.

When the flange 75 of the slider 72 comes into contact with the stopper surfaces 67 and 68, the retraction of the blade 60 is completed, and in such a state, the tip of the blade 60 touches the lift-up surface 64 of the lift-up guide 62. It is lightly garnished.

Therefore, when the rear wiper 28 is not in use, the wiper blade 60 is lifted up and separated from the rear glass 22 and stored on the outer side of the rear roof rail 21.
The rear glass 22 can be raised and lowered freely, and when the rear glass 22 is opened to take out and take out luggage, the wiper blade 60 does not interfere with the loading and unloading of the luggage, improving work efficiency. do.

According to this invention, a wiper motor is placed near a pivot shaft, and a crank arm attached to the crankshaft of the wiper motor is connected to the pivot shaft via a link. Since the bracket supports the wiper motor and pivot shaft, and the drive system for the rear wiper is unified, installation on the car body side is extremely easy, and the crankshaft and pivot shaft are supported by the bracket. Even though the distance between the shaft and the shaft is set to 6 to 10 times the effective length of the crank arm, placing the wiper motor and the pivot shaft in relatively close proximity, the pivot Since the rotation angle of the shaft is kept from becoming small, it is possible to downsize the wiper drive system, easing restrictions on the installation position of the drive system, and providing a sufficient wiping angle, making it possible to drive in the rain. This improves visibility through the rear glass when driving, making it particularly suitable for pickups and van-type trucks with a rear body, and the drive system is located near the roof panel of the rear body. Even when the drive system is installed, the rear body cabin space is less narrowed due to the installation of the drive system, making it extremely practical.

As mentioned above, from the specific examples of this invention explained with reference to the drawings, for those who have ordinary knowledge in the technical field to which this invention pertains,
Various design modifications and changes can easily be made, and furthermore, the structure of this invention satisfies essentially the same tasks and achieves the same effects as that invention. The invention could easily be replaced by an essentially identical embodiment.

[Brief explanation of the drawing]

Figure 1 shows the rear view of the car used in this invention.
A perspective view from the rear of the pick-up with the rear body to which the wiper is applied; FIG. 2 is a partial vertical cross-section of the pick-up shown in FIG. 1 taken along line 2-2; Figure 3 is a partial vertical sectional view of the rear roof rail in the vicinity of the wiper motor, Figure 4 is a perspective view showing the wiper motor, link rod, and bracket in the rear wiper drive unit, and Figure 5 is a partial longitudinal sectional view of the rear roof rail near the wiper motor. 6 is a vertical cross-sectional view showing the sliding pivot holder in the pivot shaft, FIG. 6 is a perspective view showing the wiper blade lifted up by the lift-up guide and slider, and FIG. 7 is the lift-up guide and slider.
A vertical cross-sectional view showing a state in which the lift-up guide and the slider start lifting up the wiper blade, FIG. 8 is a front view of the lift-up guide, and FIG. 9 is a diagram showing the lift-up shown in FIG. 8. A vertical cross-sectional view taken along line 9-9 of the up guide;
FIG. 10 is a front view of the slider, and FIG. 11 is a longitudinal sectional view of the slider shown in FIG. 10, taken along line 11--11. 10... Pick up, 11... Cab, 1
2...Cargo platform, 14...Rear body, 15...Roof panel, 18...Rear panel, 21...
Rear roof rail, 22...Rear glass,
25... Box opening, 26... Wiper motor box, 27... Wiper motor cover, 28... Rear wiper, 30... Pivot.
Shaft, 31... wiper motor, 33... link mechanism, 36... bracket.

Claims (1)

[Scope of Claim for Utility Model Registration] A wiper motor is disposed near a pivot shaft, and a crank arm attached to the crankshaft of the wiper motor is connected to the pivot shaft via a link. , a bracket supports the wiper motor and the pivot shaft, respectively, and the interaxial distance between the crankshaft and the pivot shaft is set to 6 to 10 times the effective length of the crank arm. A rear wiper used in an automobile, which is characterized by: