JP3572374B2 - Wiper installation structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mounting structure of a wiper device supported and fixed to a window glass of a vehicle.
[0002]
[Prior art]
Conventionally, as a mounting structure of this type of wiper device, there is a structure described in FIG. 6 and Japanese Utility Model Laid-Open No. 4-31653.
In these mounting structures, as shown in FIG. 6, a rear wiper device 51 is mounted on a mounting opening 60a provided in a rear window glass 60 of a back door. The vehicle includes a rear wiper drive unit 52 including a rear wiper motor disposed inside the vehicle, and a rear wiper arm (not shown) including a wiper blade disposed outside the rear window glass 60 on the vehicle side.
[0003]
The motor shaft 52a of the rear wiper driving unit 52 passes through the through hole 50a of the seal member 50 fitted in the mounting opening 60a of the rear window glass 60, and the motor shaft 52a has a screw portion 52b formed on the vehicle outside of the motor shaft 52a. Is screwed with a nut 56. The inside of the motor shaft 52a is inserted through an insertion opening 54a of a support bracket 54 on which the rear wiper driving unit 52 is supported, and a protrusion 54b around the insertion opening 54a of the support bracket 54, the nut 56, Presses the inside and outside of the seal member 50, whereby the rear wiper device 51 is attached to the rear window glass 60.
[0004]
Reference numeral 58 denotes a cover member made of a synthetic resin, which surrounds the rear wiper driving section 52 and the support bracket 54 to improve the appearance through the rear window glass 60.
The mounting position of this conventional rear wiper device 51 is set as close to the peripheral edge of the rear window glass as possible in order to increase the wiper wiping range.
[0005]
[Problems to be solved by the invention]
By the way, the window glass has a problem in that vibrations are generated in the out-of-plane direction during traveling and noise is generated.
However, conventionally, since the wiper device is attached regardless of the vibration of the window glass, the structure has not been actively suppressed.
[0006]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a mounting structure of a wiper device capable of effectively suppressing vibration of a window glass. I do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a mounting structure of a wiper device according to the present invention according to claim 1 of the present invention is a mounting structure of a wiper device that supports and fixes the wiper device near one side peripheral portion of a window glass.
The window glass is along a virtual line passing through a first position where the wiper device is attached, and a second position opposite to the first position near the other side edge portion facing the one side edge portion. In the cross-sectional shape seen, a bent portion is provided near the first position near the one side peripheral portion where the wiper device is attached, and the curvature of the bent portion is the second side near the other side peripheral portion of the window glass. Is formed to be larger than the curvature at the position .
[0008]
According to a second aspect of the present invention, in the first aspect, the window glass has a first position at which a wiper device is mounted and a second position near the other side peripheral portion facing the one side peripheral portion. In a cross-sectional shape viewed along an imaginary line passing through a second position corresponding to one position, a portion formed with a substantially constant curvature from the other side peripheral portion to the vicinity of the first position, a first position And a portion formed with a substantially constant curvature from the first peripheral edge portion to the one side peripheral portion is characterized by being formed in a substantially V-shape via a bent portion formed with a maximum curvature near the first position. .
[0009]
According to a third aspect of the present invention, in the first or second aspect, the wiper device includes a wiper driving unit disposed inside the window glass on the vehicle interior. A metal plate that covers at least a part of the wiper driving unit is coupled to the vehicle interior side.
According to a fourth aspect of the present invention, in the device according to any one of the first to third aspects, the mounting position of the wiper device is substantially equal to a substantially central position of the window glass when viewed in a direction substantially perpendicular to the imaginary line. It is characterized by being attached to a window glass.
[0010]
【The invention's effect】
According to the first aspect of the present invention, the window glass has the first position where the wiper device is attached, and the second position opposite to the first position near the other side peripheral portion facing the one side peripheral portion. In the cross-sectional shape viewed along the imaginary line passing through , a bend is provided in the vicinity of a first position near one peripheral edge to which the wiper device is attached, and the curvature of the bend is the other of the window glass. By being formed to be larger than the curvature of the second position near the side peripheral portion , the wiper device plays a role of a mass damper, effectively suppresses out-of-plane vibration of the window glass, and suppresses noise. be able to.
[0011]
Here, if the window glass is formed with a uniform curvature, the vibration energy becomes the largest at the central portion away from the peripheral portion of the window glass, so that it is most effective to attach a mass damper to this portion. become. On the other hand, when the curvature of at least a part of the window glass near the one side peripheral portion is formed larger than the curvature of the window glass near the other side peripheral portion, the bending rigidity in the bending direction of the portion having the large curvature is larger than that of the periphery. Therefore, the vibration in this vicinity is larger than that in the window glass having a uniform curvature, and the vibration energy distribution is shifted toward the one side edge of the window glass. Therefore, by supporting and fixing the wiper device at the first position near the one-side peripheral portion, the vibration energy biased toward the one-side peripheral portion by the mass damper action of the wiper device can be effectively absorbed. In other words, by adopting the structure of the window glass as described above, a region where large vibration is generated on the surface of the window glass is biased toward one side peripheral portion of the window glass, and the vibration is suppressed by a wiper as a mass damper in this portion. With such a structure, the vibration energy can be more efficiently absorbed than when the wiper device is simply mounted near the one peripheral edge of the window glass, and a large vibration reduction effect can be obtained.
[0012]
Further, with the above-described configuration, it is possible to sufficiently reduce the sound vibration even without mounting the wiper device near the central portion of the window glass, and the wiping performance of the rear wiper device is not hindered.
According to the second aspect of the present invention, in addition to the operation and effect according to the first aspect, a portion formed with a substantially constant curvature from the other side peripheral portion to the vicinity of the first position, A portion formed with a substantially constant curvature from the position to the one side peripheral portion is substantially connected to the first position through a bent portion formed with a maximum curvature near the first position, so that the portion is formed substantially in a V-shape. The wiper device, which is supported and fixed in the vicinity of the bent portion bent in a V-shape, more effectively suppresses the bending deformation of the window glass, which becomes particularly large at the bent portion, by its mass damper effect, and obtains a greater vibration reduction effect. be able to.
[0013]
According to the third aspect of the invention, in addition to the operation and effect according to the first or second aspect, by connecting a metal plate to the wiper driving unit, compared with the conventional wiper device, The weight of the mass damper can be increased, and the vibration of the window glass can be suppressed. Further, by coupling the metal plate to the wiper driving unit, the metal plate also functions as a mass damper against the vibration of the wiper driving unit itself, and the vibration can be suppressed. Further, by connecting a metal plate to the inside of the wiper drive unit so as to cover at least a part of the wiper drive unit, the plate can perform a sound insulation function of the wiper drive unit with respect to the inside of the vehicle compartment.
[0014]
According to the fourth aspect of the invention, in addition to the functions and effects according to any one of the first to third aspects, the mounting position of the wiper device is substantially at the center of the window glass when viewed in a direction substantially perpendicular to the imaginary line. Since the wiper device is attached to the window glass so as to be located at the position, the wiper device is attached to a substantially central position where the vibration energy is considered to be the largest with respect to a cross section viewed in a direction perpendicular to the imaginary line, Vibration of the window glass can be effectively suppressed. Further, the wiping range of the wiper can be made symmetrical with respect to the central portion.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view (a cross-sectional view taken along line 1-1 of FIG. 3) illustrating an embodiment of a mounting structure of a wiper device of the present invention, FIG. 2 is an exploded perspective view of the mounting structure of the present invention, 3 is a rear view of the window glass, and FIG. 4 is a sectional view taken along line 4-4 in FIG.
[0016]
As shown in FIG. 3, reference numeral 10 denotes a rear window glass (window glass) of the back door 12, and a rear wiper device 13 as a wiper device is supported and fixed to the rear window glass 10. The rear wiper device 13 includes a rear wiper arm 14 having a wiper blade disposed outside the rear window glass 10 and a rear wiper driving the rear wiper arm 14 disposed inside the rear window glass 10. The rear wiper drive unit 26 is surrounded by a cover member 18 made of synthetic resin.
[0017]
As shown in FIG. 1, the cover member 18 includes an outer cover 19 and an inner cover 20 that is integrally connected to the outer cover 19 and the screw 21. The metal support bracket 22 is connected to the outer cover 19 by screwing screws 23 (see FIG. 2) penetrating the three mounting holes 22a of the support bracket 22.
[0018]
Further, as shown in FIG. 2, a rear wiper driving unit 26 and a metal plate 25 are fixed to the support bracket 22. That is, the support bracket 22 is provided with three mounting holes 22b, and the mounting cylinder portions 26a, 26b, 26c and the mounting cylindrical portions are provided in the rear wiper driving portion 26 and the metal plate 25 corresponding to the mounting holes 22b. Holes 25a, 25b, and 25c are provided, and a nut 27 is screwed into a long screw 24 that passes through the mounting holes 22b, the mounting cylinders (26a, 26b, 26c), and the mounting holes (25a, 25b, 25c). By doing so, the rear wiper driving section 26 and the metal plate 25 are fixed to the support bracket 22. The metal plate 25 is connected to the inside of the rear wiper drive unit 26 and covers a part of the rear wiper drive unit 26 from the inside of the vehicle.
[0019]
The rear wiper driving section 26 has a rear wiper motor 28 with a speed reducer, and the rotation generated by the rear wiper motor 28 passes through a motor shaft 29 via a reduction gear (not shown) and projects outside the vehicle. It is transmitted to the output shaft 30.
In the drawing, reference numeral 16 denotes a back door panel, and 17 denotes a weather strip.
The cover member 18, the support bracket 22, the rear wiper driving unit 26, and the metal plate 25 are attached to the rear window glass 10 at the mounting holes 10 a and 10 b formed in the rear window glass 10. , Are mounted as follows.
[0020]
As shown in FIG. 1, the mounting opening 10 a of the rear window glass 10 has a cross section that is in close contact with the outer side surface and the inner side surface of the rear window glass 10 and has a thickness that varies according to the inclined surface of the rear window glass 10. A substantially E-shaped seal member 32 is fitted therein, and the motor shaft 29 passes through a through hole 32 a provided in the center of the seal member 32.
[0021]
The motor shaft 29 includes a small-diameter portion 29a penetrating through the through hole 32a of the seal member 32, a large-diameter portion 29b connected to the motor shaft 29 base end side of the small-diameter portion 29a, a small-diameter portion 29a and a large-diameter portion 29b. And a screw portion 29d formed on the tip side of the small-diameter portion 29a and having a surface perpendicular to the axial direction of the motor shaft 29. The large-diameter portion 29b passes through the insertion openings 22c and 19a provided in the support bracket 22 and the outer cover 19, respectively, and the step portion 29c presses the inside of the seal member 32 with the flat washer 34 therebetween. A nut 36 is fastened to the screw portion 29d located on the vehicle exterior side of the seal member 32, and presses the vehicle exterior side of the seal member 32 with the washer 38 interposed therebetween. Thus, the stepped portion 29c and the nut 36 sandwich the flat washer 34 and the washer 38, respectively, and press the seal member 32 from both sides of the inside and the inside of the seal member 32, so that the motor shaft 29 is attached to the rear window glass 10. Can be
[0022]
As shown in FIG. 4, the other mounting opening 10 b of the rear window glass 10 is in close contact with the outer side surface and the inner side surface of the rear window glass 10, and changes according to the inclined surface of the rear window glass 10. A sealing member 40 having a substantially E-shaped cross section having a thickness is fitted therein, and a bolt 42 penetrates a through hole 40 a provided at a center portion of the sealing member 40, and is fastened from the vehicle window side of the rear window glass 10. The nut 42 fixes the bolt 42 to the rear window glass 10. The bolt 42 penetrates through the second insertion openings 19 d and 22 d of the outer cover 19 and the support bracket 22, and a nut 46 is fastened to the bolt 42 from inside the vehicle of the support bracket 22, so that the support bracket 22 is Are supported and fixed to the rear window glass 10. A mount rubber 48 (elastic body) inserted between the nut 44 and the support bracket 22 and elastically contacting the two is disposed around the axis of the bolt 42.
[0023]
As shown in FIG. 3, the rear wiper device 13 supported and fixed to the rear window glass 10 has one of the peripheral edges of the rear window glass 10 so as not to hinder its wiping performance. That is, in this example, it is attached to the lower side. The mounting position of the rear wiper device 13 along the lower side, that is, along the vehicle width direction is set so as to be substantially the center of the lower side together with the handle 12a of the back door 12.
[0024]
It passes through a mounting position (first position) A at which the rear wiper device 13 is mounted, and a relative position (second position) B, which is closer to the mounting position A and closer to the upper side as the other side edge. FIG. 5 is a cross-sectional view taken along the imaginary line AB.
The cross-sectional shape of the rear window glass 10 shown in FIG. 5 is not uniform, but has an upper portion 10c having a uniform curvature which is inclined so as to gradually swell backward from above to below. The lower part 10d is bent in the lower direction and has a uniform curvature below the lower part 10d. The boundary between the two parts is a bent part 10e having the largest curvature and bent in the shape of a substantially square. The bent portion 10e has a curvature larger than that of a portion near the upper side of the rear window glass 10, and is provided near a mounting position (first position) point A where the rear wiper device 13 is mounted. The weight of the rear wiper device 13 is applied near the bent portion 10e. In this manner, the rear wiper device 13 functions as a mass damper for the rear window glass 10 and also has a role of suppressing out-of-plane vibration of the rear window glass 10 during traveling.
[0025]
When the vibration energy distribution of the rear window glass 10 is viewed along the cross section in FIG. 5, the presence of the bent portion 10 e causes the rear window glass 10 to be closer to the bent portion 10 e than in the case where the rear window glass 10 has a uniform radius of curvature. That is, the vibration energy distribution is shifted toward the lower side of the rear window glass 10. Therefore, by supporting and fixing the rear wiper device 13 near point A near the lower side of the rear window glass 10, vibration energy can be efficiently absorbed by the mass damper of the rear wiper device 13, and a large vibration suppression effect. Can be obtained.
[0026]
Further, since the rear wiper device 13 is supported and fixed in the vicinity of the bent portion 10e, the bending deformation of the rear window glass 10, which is particularly large at the bent portion 10e, is more effectively suppressed by the mass damper effect of the rear wiper device 13, and A large vibration reduction effect can be obtained.
FIGS. 7 and 8 are graphs showing the noise level when the rear wiper device 13 is attached to the bent portion 10e and when it is not attached. The horizontal axis represents the frequency and the vertical axis represents the noise level. I have. It can be seen that when the rear wiper device 13 is attached to the bent portion 10e, the noise is remarkably reduced especially at around 1 kHz.
[0027]
The rear wiper drive unit 26 has a rear wiper motor 28 with a speed reducer and the metal support bracket 22 that supports the rear wiper drive unit 26 alone has a weight to function as a mass damper. In addition, by connecting the metal plate 25 to the inside of the rear wiper drive unit 26 to increase the weight, the function as a mass damper can be further enhanced.
[0028]
Further, as shown in FIG. 3, in the vehicle width direction which is a direction substantially perpendicular to the imaginary line connecting the points A and B, the position where the amplitude energy of the rear window glass 10 becomes the largest, that is, the substantially center position. Since the rear wiper device 13 is attached to the site, the vibration of the rear window glass 10 can be effectively suppressed. Since the handle 12a is similarly provided at the center portion in the vehicle width direction, the handle 12a is shifted from the center within a range that does not cause a problem as shown in FIG. It is good to be able to be attached.
[0029]
Further, the metal plate 25 can also function as a mass damper against the vibration of the rear wiper motor 28 itself, and the vibration of the rear wiper motor 28 can be suppressed. In particular, since the rear wiper driving section 26 is sandwiched between the metal plate 25 and the metal support plate 22, vibration of the rear wiper motor 28 can be further suppressed.
[0030]
In addition, since the metal plate 25 covers a part of the rear wiper drive unit 26 from the vehicle interior side, the rear wiper drive unit 26 has a sound insulation function with respect to the vehicle interior side. In the present embodiment, the metal plate 25 covers the interior side of the rear wiper drive unit 26 excluding the rear wiper motor main body. It is also possible to enhance the sound insulation effect by covering the whole.
[0031]
Further, the present embodiment relates to a rear wiper device provided on hatch glass, but it goes without saying that the present invention may be applied to a window glass provided at another position of a vehicle.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view (a cross-sectional view taken along line 1-1 in FIG. 3) illustrating an embodiment of a mounting structure of a rear wiper device of the present invention.
FIG. 2 is an exploded perspective view of the mounting structure of the present invention.
FIG. 3 is a rear view of the mounting structure of the present invention viewed through a rear window glass.
4 is a cross-sectional view (a cross-sectional view taken along line 4-4 in FIG. 3) illustrating an embodiment of the mounting structure of the rear wiper device of the present invention.
5 is a cross-sectional view (a cross-sectional view taken along the line AB in FIG. 3) illustrating an embodiment of the mounting structure of the rear wiper device of the present invention.
FIG. 6 is a cross-sectional view (corresponding to FIG. 1) showing an embodiment of a mounting structure of a conventional rear wiper device.
FIG. 7 is a graph showing a noise level when a rear wiper device is attached to a bent portion.
FIG. 8 is a graph showing a noise level when a rear wiper device is not attached.
[Explanation of symbols]
Reference Signs List 10 rear window glass 10e bent portion 13 rear wiper device 25 metal plate 26 rear wiper drive unit

Claims (4)

In the mounting structure of the wiper device for supporting and fixing the wiper device near one side peripheral portion of the window glass,
The window glass is along a virtual line passing through a first position where the wiper device is attached, and a second position opposite to the first position near the other side edge portion facing the one side edge portion. In the cross-sectional shape seen, a bent portion is provided in the vicinity of a first position near one side peripheral portion where the wiper device is attached, and the curvature of the bent portion is the second side near the other side peripheral portion of the window glass. The wiper device mounting structure is formed so as to be larger than the curvature at the position . The window glass is along a virtual line passing through a first position to which the wiper device is attached, and a second position opposite to the first position near the other side edge portion facing the one side edge portion. In the cross-sectional shape seen, a portion formed with a substantially constant curvature from the other peripheral portion to the vicinity of the first position, and a portion formed with a substantially constant curvature from the first position to the one peripheral portion are the third. 2. The mounting structure for a wiper device according to claim 1, wherein the connection structure is formed in a substantially rectangular shape through a bent portion having a maximum curvature near one position. The wiper device has a wiper drive unit disposed inside the window glass, and a metal plate that covers at least a part of the wiper drive unit is coupled to the wiper drive unit on the vehicle interior side. 3. The mounting structure for a wiper device according to claim 1, wherein 4. The wiper device according to claim 1, wherein the wiper device is attached to the window glass such that the attachment position is substantially a center position of the window glass when viewed in a direction substantially perpendicular to the virtual line. Wiper device mounting structure.

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