JPS63215450A - Wiper device for vehicle - Google Patents

Abstract

PURPOSE:To effectively clean a wide region including the corner parts of a window glass by changing the position of the second turning shaft installed at the top edge of the second auxiliary arm by the relative turn between the first and second auxiliary arms and turning a wiper arm around the second turning shaft. CONSTITUTION:When the first rotary shaft 131 is turned by a driving means, the first auxiliary arm 130 turns, and the second auxiliary arm 120 relatively turns for the first auxiliary arm 130. The position of the second turning shaft 125 as the rotary shaft of a wiper arm 110 installed at the top edge of the second auxiliary arm 120 is changed by the relative turn of the first and second auxiliary arms 130 and 120, and the wiper arm 110 is turned around the shifting second turning shaft 125, and the cleaning region is spread. Therefore, if the wiper is installed onto a body panel set along the underside of a car window, a broad region to the upper side corner part of the window can be effectively cleaned.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wiper device for a vehicle, and in particular to a wiper device that moves the rotation axis of a single wiper arm to expand the wiping range and wipe the entire surface of the vehicle window. Regarding equipment.

[Prior Art] In recent years, vehicle windows have tended to become longer in the vertical direction due to the increase in slope with the aim of improving the openness of the passenger compartment or improving aerodynamic characteristics. A wiper device that is rotatably supported by a rotary shaft whose position is fixed has a problem in that a relatively wide area that cannot be wiped is formed on the upper side of the windshield, which has a large effect on visibility from inside the vehicle.

To solve this problem, various wiper devices have been proposed that move the rotation axis of the wiper arm upward when the wiper arm is activated (for example, Japanese Patent Publication No. 47-46-368, Japanese Patent Publication No. 47-47-
No. 49739, Japanese Unexamined Patent Application Publication No. 1983-49739, No. 4 i-928,
(Japanese Patent Publication No. 58-8445).

[Problems to be Solved by the Invention] However, the conventional wiper device described above still has a problem in that the wiping area is not sufficient, and a relatively large area that cannot be wiped remains, especially at the upper corner of the window glass.

The present invention aims to solve such problems, and aims to provide a wiper device for a vehicle that can effectively wipe a wide area including the corners of a windshield.

[Means for Solving the Problems] The configuration of the present invention will be explained with reference to FIGS. 1 to 4. The wiper device 100 includes a first wiper device provided on a body panel 1a along a vehicle window 2 (FIG. 4). A first auxiliary arm 130 whose base end is supported by a rotating shaft 131; and a second auxiliary arm whose base end is supported by a second rotating shaft 135 provided at the tip of the first auxiliary arm 130. 120, a wiper arm 1]-0 whose base end is supported by a third rotating shaft 125 provided at the tip of the second auxiliary arm 120, and which rotates and wipes the windshield surface with the held blade 11]; a first rotation transmitting means for transmitting the relative rotation of the first auxiliary arm 130 with respect to the body panel 1a to the second rotation shaft 135 to rotate the second auxiliary arm 120; a second rotation transmitting means for transmitting the relative rotation of the second auxiliary arm 120 to the auxiliary arm 130 to the third rotation shaft 125 to rotate the wiper arm 110 ]-23; A drive means 150 (FIG. 3) for rotationally driving the shaft 31 is provided.

[Operations and Effects] In the wiper device having the above configuration, when the first rotating shaft 13 is rotated by the driving means 150, the first auxiliary arm 30 is rotated and the second auxiliary arm is rotated. 120 rotates relative to the first auxiliary arm 130, and the wiper arm 111 rotates relative to the second auxiliary arm 120.

In the above operation, the position of the second rotating shaft 125 as a wiper arm rotating shaft provided at the tip of the second auxiliary arm 120 changes due to the relative rotation of the first and second auxiliary arms 130 and 120, The wiper arm 110 rotates around this moving second rotating shaft 125 to expand the wiping area.

Therefore, if the wiper device of the present invention is provided, for example, on a body panel along the lower side of a vehicle window, a wide area up to the upper corner of the window can be effectively wiped.

[Embodiment] FIG. 4 shows how the wiper device according to the present invention is installed on a vehicle. The wiper device 100, which is not attached below the front window 2 of the vehicle 1, includes a wiper arm 110 that holds a blade 111, a second auxiliary arm 120 that pivots at one end of the wiper arm 110, and a second auxiliary arm 120 that pivots at one end. and a first auxiliary arm 130 whose other end is pivoted to the body panel 1a of the vehicle;
a drive motor 150 bolted to the motor 15;
A drive link 14 that converts and transmits the rotational motion of 0 into a swinging motion.
Consists of 0. Further, a solid line A1 drawn on the front windshield 2 indicates the trajectory of the tip of the blade 1.11 of the present wiper device 100, and it can be seen that the present wiper device 100 wipes almost the entire surface of the front window 2. The configuration will be explained in more detail below using FIGS. 1 to 3.

Figure 1 is a cross-sectional view of the device taken along line I-I in Figure 2;
FIG. 2 is a cutaway plan view of the device, and FIG. 3 is an exploded perspective view of the device.

The drive link 140 includes a crank lever 141 whose one end is fixed to the output shaft 151 of the motor ]-50, and a connecting lever 142 which is pivotally supported on the rotating outer peripheral end of the crank lever 141.
and a swinging lever connected to the lower end of the rotating shaft 1-31 by a nut 143 and having its other end pivoted to a connecting lever 142], 44.

The rotating shaft 131 is rotatably supported by the support cylinder 10 fixed to the body panel ]-a. Also, the rotating shaft 131
is a flange 131 for preventing upward removal from the support tube 10.
It has a.

The first auxiliary arm 130 includes an upper cover 132, a lower cover 133, a center gear 134, a planetary gear 1°35a, etc. The shaft portion 134a of the center gear 134 is attached to the lower cover 1.
Hole 33] is pivotally supported by the hole 33a and is housed in the recess 10a of the support tube 10.

The center gear 134 is fixed to the support tube 10 by a pin 136.

On the other hand, the hollow shaft portion 132a of the upper cover 132, which is connected to the lower cover 133 by a screw 137, is pivoted within the shaft portion 134a of the center gear 134, and the shaft portion 1.3
2a, the rotating shaft 131 passes through it. Rotating axis 1
31 is fixed to the hollow shaft portion 132a by a nut 138. In this way, the upper cover 132 is integrally combined.
The lower cover 133 is rotatable relative to the center gear 134.

rotating shaft], 35 is an upper cover 132 and a lower cover 13
A planetary gear 135a formed at the lower end of the rotating shaft 134 meshes with the center gear 134. Therefore, the upper cover 132 and
As the lower cover 133 rotates around the center gear 134, the rotating shaft 135 rotates while revolving around the rotating shaft 131.

The second auxiliary arm 120 includes an upper cover 121, a lower cover 122, a center gear 123, an intermediate gear 124, a planetary gear] 25a, and the like.

A shaft portion 123a of the center gear 123 is pivotally supported in a hole 122a (FIG. 3) of the lower cover 122. Furthermore, the center gear 123 is connected to the upper cover 13 of the first auxiliary arm 1.30.
2 by a pin 126.

The hollow shaft portion 121a of the upper cover 121, which is connected to the lower cover 122 by a screw 127, is connected to the center gear 12.
No. 3 shaft part: pivoted on +-23a, and the above shaft part 121
A rotating shaft], 35 is provided through the inside of the rotary shaft. Rotating shaft 135
is fixed to the shaft portion 121a by a nut 128.

The intermediate gear 124 is supported between the upper cover 121 and the lower cover 1.degree. 22, and meshes with the center gear 123.

The rotating shaft 125 is connected to the upper cover 121 and the lower cover 1.
A planetary gear 125a, which is rotatably supported between the gears 22 and formed at the lower end thereof, meshes with the intermediate gear 124. Therefore, as the upper cover 121 and the lower cover 122 rotate around the central gear 123,
The rotating shaft 125 rotates while revolving around the rotating shaft 135.

The wiper arm 110 is connected to a rotating shaft 125 by a nut 112.
is fixed.

When power is applied to the motor 150, the crank lever 14
1 rotates, and this rotational force is transmitted via the connecting lever 142,
Swing the swing lever 144.

The swing lever 144 is connected to the rotating shaft 1.31, and the rotating shaft 131 is connected to the upper cover 132 of the first auxiliary arm 130, so that the upper cover 132 and lower cover 133 of the first auxiliary arm 130 swing. . center gear 1
34 is fixed to the body panel 1a, so the first
When the auxiliary arm 130 swings, the rotating shaft ]-35 revolves around the rotating shaft 131 and rotates on its own axis according to the amount of swing.

Since the rotating shaft 1.35 is connected to the upper cover 121 of the second auxiliary arm 120, the second auxiliary arm 120 revolves and rotates around the rotating shaft 131 together with the rotating shaft 135.

When the second auxiliary arm ] 20 rotates, the center gear 1.23
is fixed to the first auxiliary arm 120 and the second auxiliary arm 13.
It revolves around the center gear 123 and rotates depending on the relative rotation amount of 0.

The wiper arm 110 is the rotation axis 1 of the second auxiliary arm] 20
25, the wiper arm]-10 rotates integrally with the rotating shaft 125. Due to the above operations, the tip of the wiper arm 110 traces a trajectory as shown in FIG. 4.

An example of each specification of the wiper device is shown below.

Swing angle of swing lever 144...97° Center gear]-34 Number of teeth...]02 teeth Planetary gear 1-35
Number of teeth of a...20 teeth Interaxial pressure separation between center gear 134 and planetary gear]-35a...122 mm Number of teeth of center gear 123...23 teeth of intermediate gear 124 Number of teeth: 16 teeth planetary gear 12
Number of teeth of 5a... 1-5 teeth Distance between the shafts of the center gear 123 and the planetary gear 125a...70 mm Distance from the support center of the wiper arm 110 to the tip of the blade] 11... ...885mm Length of the blade 111...585mm Distance between the lower side of the front window 2 and the rotating shaft 131...100mm Length of the lower side of the front window 2...mark 1475mm Front window 2 Upper side length: 1200mm Vertical length of front window 2: 850mm or more When determining the specifications, the operating angle of each arm is: 2nd sub arm operating angle: 97゜First sub-arm operating angle...97 + 97 x 102 = 5
91.70° Main arm operating angle = -166,84'.

Therefore, by allocating each operation symmetrically, in Fig. 5 (1), θ1-(180-97>/2=41..50'θ2-(
591,7-540>/2=25.85° θ3-(180-166,84>/2=6.58°.

Wiper arm 1]0 in Fig. 5 (1) to Fig. 5 (9)
This shows the operation from the left reversed position to the right reversed position.

In the figure, LMAI is the movement trajectory of the tip of blade 1-11, L
MA2 indicates the movement trajectory of the inner end of the blade] 11, LSAI indicates the movement trajectory of the rotation shaft 1-25 that supports the wiper arm 110, and LSA2 indicates the movement trajectory of the rotation shaft 135 that supports the second auxiliary arm 120.

As is known from FIG. 5, when the tip of the wiper arm 110 is at the lower side of the vehicle window, the distance from the rotating shaft 131 is the shortest, while when it is at both corners of the upper side of the vehicle window, the distance from the rotating shaft 131 is the shortest. is the longest. At the center of the upper side of the vehicle window, the above-mentioned tip and the rotating shaft 13
The distance to 1 is between the longest and shortest.

Thus, according to the wiper device of the present invention, a wide area can be wiped along the upper side of the vehicle window, which is enlarged in the vertical direction.

FIG. 9 shows how a wiper device according to a second embodiment of the present invention is installed on a vehicle. The wiper device 200 attached below the front window 2 of the vehicle 1- includes a wiper arm 210 that holds a blade 211, a second auxiliary arm 220 that pivotally supports the wiper arm 210 at one end, and a second
A first auxiliary arm 23 pivotally supports the auxiliary arm 220 at one end, and the other end is pivotally supported on the vehicle body panel 1a.
0, drive motor 250. It is comprised of a drive link 240 that converts and transmits the rotational motion of the motor 250 into a swinging motion. Further, a solid line A2 drawn on the front window 2 indicates the trajectory of the tip of the blade 211 of the wiper device 200, and it can be seen that the wiper device 200 wipes almost the entire surface of the front window 2. The configuration will be explained in more detail below using FIGS. 6 to 8.

Figure 6 is a cross-sectional view of the device, taken along the line ■-■ in Figure 7;
FIG. 7 is a plan view of the device with each upper cover removed;
FIG. 8 is an exploded perspective view of the device.

In the figure, a motor 250 is attached to the body panel 1a with bolts or the like (not shown).

The drive link 240 includes a crank lever 241 that has one end fixed to the output shaft 251 of the motor 250, a connecting lever 242 that is pivotally supported on the rotating outer peripheral end of the crank lever 241, and a nut 243 that is attached to the lower end of the rotating shaft 261-. It is composed of a swinging lever 244 that is coupled to each other, and second coupling levers 245 and 246 that have one end pivoted to both ends of the swinging lever 244 and the other end pivoted to the coupling lever 242.

A speed increasing mechanism 260 is provided, which has the function of further speeding up the swinging force of the drive link 240 and transmitting it to the first auxiliary arm 230, and includes a rotating shaft 261, an upper cover 262,
Lower cover 263, upper plate 264, internal gear 2
65, a planetary gear 266, a center gear 267a, etc.

The rotating shaft 261 is pivotally supported in a hole 263a of the lower cover 263. The flange portion 261a of the rotating shaft 261 is connected to the upper plate 264 by a stud pin 268.

The planetary gear 266 has a shaft portion inserted into the hole 2 of the upper plate 264.
64a and the hole 26 in the flange portion 261b of the rotating shaft 261.
It is pivoted to 1c.

The internal gear 265 that meshes with the planetary gear 266 is connected to the pin 26
9, it is fixed to the upper cover 262 and the lower cover 263.

Shaft portion 26 of center gear 267a meshing with planetary gear 266
7 are pivotally supported in the top recesses of the upper cover 262 and the rotating shaft 261, respectively. The upper cover 262 and the lower cover 263 are connected to each other by screws 262a, and are fixed to the body panel 1a by screws 263b.

The first auxiliary arm 230 includes an upper cover 231, a lower cover 232, a center gear 233, an intermediate gear 234, a planetary gear 235a, and the like.

A shaft portion 233a of the center gear 233 is pivotally supported in a hole 232a of the lower cover 232. Further, the center gear 233 is fixed to the upper cover 262 by a pin 236.

On the other hand, the hollow shaft portion 231a of the upper cover 231 connected to the lower cover 232 by the screw 237 is connected to the center gear 2.
33, and a shaft 267 of a center gear 267a extends through the shaft 231a. The shaft portion 267 is fixed to the shaft portion 231a with a nut 238.

The intermediate gear 234 is connected to the upper cover 231 and the lower cover 23
2, and is meshed with the center gear 233. Planetary gear 23 formed at the lower end of rotating shaft 235
5a is pivotally supported by the upper cover 231 and the lower cover 232 and meshes with the intermediate gear 234.

Therefore, when the upper cover 231 and the lower cover 232 rotate around the center gear 233, the rotating shaft 235 rotates while revolving around the shaft portion 267 according to the amount of rotation.

The second auxiliary arm 220 includes an upper cover 221, a lower cover 222, a center gear 223, and intermediate gears 224a and 22.
4b, a planetary gear 225a, etc.

A shaft portion 223a of the center gear 223 is pivotally supported in a hole 222a of the lower cover 222. The center gear 223 is fixed to the upper cover 231 by a pin 226.

On the other hand, the hollow shaft part 22]-a of the upper cover 221, which is connected to the lower cover 222 by a screw 227, is pivotally supported by the shaft part 223a of the center gear 223, and inside the shaft part 22]-a is a rotating shaft. 235 is a through-hole. The rotating shaft 235 is fixed to the shaft portion 221a by a nut 228.

The intermediate gear 224a is connected to the upper cover 221 and the lower cover 2.
22 and meshes with the center gear 223.

The intermediate gear 224b is connected to the upper cover 221 and the lower cover 2.
22 and meshes with the intermediate gear 224a.

The planetary gear 225 formed at the lower end of the rotating shaft 225
A is supported between the upper cover 221 and the lower cover 222 and meshes with the intermediate gear 224b.

Thereby, when the upper cover 221 and the lower cover 222 rotate around the center gear 223, the rotating shaft 225 rotates while revolving around the rotating shaft 235 according to the amount of relative rotation thereof.

Wiper arm 2] 0 is connected to the rotating shaft 225 by nuts 2
is fixed.

When power is applied to the motor 250, the crank lever 241
- rotates, and this rotational force causes the swinging lever 244 to swing via the connecting lever 242 and the second connecting lever 245 and 246. The swing lever 244 is connected to a rotating shaft 261-, and the rotating shaft 26 rotates the planetary gear 266. Since the internal gear 265 is fixed, the rotation angle of the rotating shaft 267=the rotation angle X of the planetary gear 266 (□1 number of teeth of the internal gear 265) is the number of teeth of the center gear 267a.

The rotation shaft 267 is connected to the upper cover 2 of the first auxiliary arm 230.
31, the first auxiliary arm 230 rotates. The center gear 233 is connected to the cover 262 of the speed increasing mechanism.
Since it is fixed to the body panel 1a via 263, when the first auxiliary arm 230 rotates, the rotating shaft 235 revolves around the rotating shaft 267 and rotates on its own axis in accordance with the amount of rotation.

The rotation shaft 235 is connected to the upper cover 2 of the second auxiliary arm 220.
21, the second auxiliary arm 220 rotates around the central gear 233.

When the second auxiliary arm rotates, since the center gear 223 is fixed to the first auxiliary arm 230, the rotating shaft 225 revolves around the rotating shaft 235 and rotates on its own axis.

Since the main arm 210 is fixed to the rotation shaft 235, it rotates around the rotation shaft 235.

Through the above operations, the tip of the wiper arm 210 traces a trajectory as shown in FIG. 9.

An example of each device specification in this case is shown below.

Swing angle of swing lever 244: 145° Number of teeth of internal gear 265: 79 teeth Number of teeth of planetary gear 266: 25 teeth Teeth of central gear 267a number····
...29 teeth Number of teeth of central gear 233 ...18 teeth Number of teeth of intermediate gear 234 ...15 teeth Planetary gear 235
Number of teeth of a: 27 teeth Interaxial pressure between center gear 233 and planetary gear 235a: 75.6 mm Number of teeth of center gear 223: 18 teeth Intermediate gear 22
Number of teeth of 4a and 224b: 14 teeth planetary gear 22
Number of teeth of 5a: 32 teeth Distance between the center gear 223 and planetary gear 225a: l10 mm Distance from the support center of the wiper arm 210 to the tip of the blade 211:・925m1Tl blade 21
Length of 1: 630 mm Distance between the lower end of front window 2 and rotating shaft 261: 115.6 m
m Front window shape: Same as in Example 1 When each specification is determined as above, the operating angle of each part is: Operating angle of rotating shaft 261: 145° Center gear 2
67 operating angle...145X<1+") = 540° Therefore, the first auxiliary arm operating angle...540° and the second auxiliary arm operating angle...540-540X. =180° Wiper arm operating angle...540-(540-540X) -540x Ridria 32 -157.5°.

Therefore, if we allocate each operating angle symmetrically, we get Figure 10 (1
), θ1-(18'O157°5)/2=1.
It becomes 1.25°.

Wiper arm 21 is shown in Figure 10 (1) to Figure 1-0 (9).
The state of the operation from the left reversal position of 0 to the right reversal position is shown. In the figure, LMA1 is the movement trajectory of the tip of the blade 211, LM
A2 is the movement trajectory of the inner end of the blade 211, LSAI is the movement trajectory of the rotating shaft 225 that supports the wiper arm 21-0,
LSA2 is a rotating shaft 23 that supports a second auxiliary arm 220.
5 shows the movement trajectory of No. 5.

This embodiment also has the same effects as the first embodiment.

In the first and second embodiments described above, each specification is shown as an example, but it is clear that the locus can be changed to an arbitrary trajectory by adopting different specifications.

In each of the embodiments described above, a gear train is used for power transmission, but it is obvious that a chain or a toothed belt transmission method may also be used.

In the second embodiment, a planetary gear train is used as the speed increasing mechanism, but other speed increasing mechanisms using a spur gear train or the like may be used.

[Brief explanation of the drawing]

1-5 show a first embodiment of the present invention,
Figure 1 is an overall sectional view of the device, a sectional view taken along the line ■-■ in Figure 2, Figure 2 is a cutaway plan view of the device, Figure 3 is an exploded perspective view of the device, and Figure 4 is a wiper device installed. FIG. 5 is a front view of the front window showing the operating state of the device, FIGS. 6 to 10 show a second embodiment of the present invention, and FIG. 6 shows the entire device. 7 is a cross-sectional view taken along line VI-Vl in FIG. 7, FIG. 7 is a plan view of the device with the upper cover removed, FIG. 8 is an exploded perspective view of the device, and FIG. 9 is a front view of the vehicle equipped with the wiper device. FIG. 10 is a front view of the front window showing the operating state of the device. ]-...Vehicle 1a...Body panel 2...Front window (vehicle window) 10
0.200... Wiper device 110.210...
... wiper arm], 11. ,211...
Blade 130.230...First auxiliary arm 120.220...Second auxiliary arm 131.
261...First rotating shaft 135.235...
...Second rotating shaft 125.225...Third rotating shaft 134.135a, 233.234.235a.
...Gear (first rotation transmission means) 123.124
．． 125.223.224a, 224b, 225a...
...Gear (second rotation transmission means)

Claims (1)

[Claims] a first auxiliary arm whose base end is supported by a first rotation shaft provided on a body panel along the vehicle window; and a base end supported by a second rotation shaft provided at the tip of the first auxiliary arm. a second auxiliary arm, a wiper arm whose base end is supported by a third rotating shaft provided at the tip of the second auxiliary arm, and which rotates and wipes the surface of the window glass with a held blade; and the body panel. a first rotation transmitting means for transmitting relative rotation of the first auxiliary arm to the second rotation shaft to rotate the second auxiliary arm;
a second rotation transmitting means for transmitting relative rotation of the second auxiliary arm with respect to the first auxiliary arm to the third rotation shaft to rotate the wiper arm; and a second rotation transmission means for rotationally driving the first rotation shaft. A wiper device for a vehicle, comprising: a drive means for driving the vehicle;