JPS62149540A - Wiper device for vehicle - Google Patents

Abstract

PURPOSE:To widen the wiping range by securing the base end of a wiper arm to a rotary shaft arranged at the tip of an auxiliary arm and stopping the rotary driving of the shaft of the auxiliary arm within predetermined angular range of the rotary shaft. CONSTITUTION:A rotary shaft 42 is arranged at the tip of an auxiliary arm 4 and the base end of a wiper arm 5 is secured to said shaft 42 while the auxiliary arm 4 is supported rotatably on a body P through a shaft 41. Consequently, when said shaft 41 will rotate, the rotary shaft 42 of the wiper arm 5 will move over a window W. Within predetermined angular range of the rotary shaft 42, rotary driving of the shaft 41 is stopped and the rotary motion of the wiper arm 5 is performed under such condition as the rotary shaft 42 is at an upper position, thereby the wiper arm 5 describes a long locus along the upper side of the window W. Consequently, a wide wiping range upto the upper section of the window W can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wiper device for a vehicle, and more particularly to a wiper device whose wiping range is expanded by moving the axis of rotation of an arm.

° [Prior Art] In recent years, vehicle windows have tended to become larger in order to improve the sense of openness in the passenger compartment. Conventional 1
The problem with the Noipa device is that a relatively wide area that cannot be wiped is created at the top of the windshield, which greatly affects visibility from inside the vehicle.

To solve this problem, various proposals have been made to move the rotation axis of the wiper arm upward (
For example, Utility Model Publication No. 58-5377, Utility Model Application No. 59-1517
No. 60).

An object of the present invention is to provide a wiper device that has a wider wiping range than the conventional wiper device by further improving the movement mechanism of the rotating shaft of the wiper arm.

[Means for Solving the Problems] The wiper device of the present invention has an auxiliary arm 4, as shown in FIG.
The base end of the wiper arm 5 is fixed to the I42. The wiper device also includes rotary shaft drive means 31.43.44.45 for rotationally driving the rotary shaft 42;
A spindle drive means 32.33.35.36 (FIG. 4) that rotationally drives the spindle 41 and stops the rotation of the spindle 41 within a predetermined angular range of the rotating shaft 42;
It is equipped with 37.

[Operations and Effects] As shown in FIG.
(If you pull it, you can rotate the support shaft 41 of the auxiliary arm 4.
Wiper arm 5 provided on auxiliary arm 4 by tightening
The zero rotation shaft 42 is moved above the window W, and the rotational drive of the support shaft 41 is stopped within a predetermined angular range of the rotation shaft 42, so that the wiper arm 5 is rotated with the rotation shaft 42 in the upper position. This causes the wiper arm 5 to draw a long trajectory along the upper side of the window W.

As a result, a wide wiping range reaching the upper part of the window W can be obtained, as shown by diagonal lines in the figure.

[Embodiment] In FIG. 2, a wiper device is provided in the center of the body along the lower side of the front window W of the vehicle, and the wiper device includes a drive motor 1 and a known link mechanism 2 connected to the motor 1. The wiper arm 5 is composed of a gear box 3 connected through a gear box 3, an auxiliary arm 4 rotatably supported at one end by the gear box 3, and a wiper arm 5 rotatably supported at the other end of the auxiliary arm 4. There is.

As shown in FIGS. 3 and 4, the gear box 3 must be fixed to the body panel P with screws, and the drive box 3 must pass through this and protrude to the front of the panel P. It is necessary to provide l1lli31. The link machine @2 is connected to the rear end of the drive shaft 31, and as the motor 1 rotates, the drive shaft 31 is rotated back and forth in forward and reverse directions.

The auxiliary arm 4 is required in the case body, and the panel 1 is attached to one end of the auxiliary arm 4.
A cylindrical support shaft 41 that protrudes toward the surface is formed. The drive shaft 31 is inserted through the support shaft 41, and the support shaft 41 is spline-coupled to a Geneva gear 32 that is relatively rotatably provided on the outer periphery of the gear box 3 penetration portion of the drive l1ilh31. At the other end of the auxiliary arm 4, a rotary shaft 42 is rotatably attached.
The base of the wiper arm 5 is fixed to the rotating 'rII 142. The rotating shaft 42 and the drive III 31 are connected by gears 43.44 provided on each shaft 42.31 and an intermediate tooth type 45 provided between these gears 43.44, and rotate together. The auxiliary arm 4 has a washer 46 at the tip of the drive shaft 31 that passes through it.
The movement in the axial direction is regulated by the nuts 1 to 47 screwed together through.

Inside the gear box 3, a gear 33 fixed to the outside of the drive shaft 31 is installed along the bottom wall (Fig. 5). 3
The intermediate gear 34 is connected to a gear 35 supported by the intermediate gear 34 . A central shaft 36 of the gear 35 extends into the box 3, and its tip 361 is formed into a disk shape, as shown in FIG. A semicircular cam portion 362 is formed protruding from the center of the disk 361, and a pin 37 is erected on the outer periphery.

Geneva gear 3 installed on the outer periphery of drive irl+ 31
As shown in the figure, cuts 321 and 322 toward the center are formed at two locations in the circumferential direction, and these cuts 3
An arcuate recess 323 having the same radius of curvature as the cam portion 362 is formed on the outer periphery of the gear between 21 and 322. In the illustrated state, the pin 37 provided on the disk 361 is inserted into the notch 3.
It is fitted into 22.

When the drive motor 1 operates, the drive shaft 31 is rotated via the link mechanism 2, and this rotational force is transmitted to the rotating shaft 42 via the gears 43 to 45 in the auxiliary arm 4, and also to the gears 33 to 35. The signal is transmitted to the disk 361 via the . That is, when the drive shaft 31 is rotated in the direction of the arrow in FIG. 5, the rotating shaft 42 and the disk 361 are rotated in the counterclockwise direction as shown by the arrow in FIG. And the disk 361
J: Revine gear 32 rotates clockwise, and in conjunction with this, auxiliary arm 4 rotates clockwise around drive @II 31.

Therefore, the drive shaft 31 continues to rotate [and the auxiliary arm 4
continues to rotate clockwise, passing through FIG. 6 and rotating to the upright position as shown in FIG. 7. During this time, the rotating shaft 12 continues to rotate counterclockwise.

When the auxiliary arm 4 reaches the upright state, the Geneva gear 3
The engagement between the notch 322 of No. 2 and the pin 37 on the disk 361 is released (FIG. 7), and at this time, the recess 323 of the tooth width 32 and the cam portion 362 are fitted. As a result, disk 3
Even if 61 rotates, the auxiliary arm 4 is held upright,
On the other hand, the rotational force of the drive lll1l131 is transmitted to the rotating shaft 42 during this time, so that only the wiper arm 5 continues to rotate in the opposite direction as shown by the arrow in the figure.

When the disk 361 further rotates, the pin 37 then fits into the cutout 321 of the tooth width 32 and engages with it to rotate the gear 32 in the direction of time δ1, and accordingly, the auxiliary arm 4 is also rotated clockwise from the upright position as shown in FIG.

Through the above process, the rotation axis 42 of the wiper arm 5 has four arcuate points passing through the x, y, and z points in FIG. 9 (these points correspond to the above-mentioned FIGS. 1, 7, and 8). (The wiper arm 5 moves upward while leaving no trace, and the wiper arm 5 rotates around the rotating shaft 42. In particular, in the wiper device of the present invention, the auxiliary arm 4 rotates at point y in the figure when it is in the upright position. Since the rotation of the auxiliary arm 4 is stopped during the predetermined angle range O of the lTllI42, the tip of the wiper arm 5 draws a long trajectory at the upper side of the window W as shown by the line in the figure. As a result, as shown by the hatched area in FIG. 2, a wide wiping area covering almost the entire area of the r-noin W is realized.

FIG. 10 shows a second embodiment of the invention. In the figure, the notches 321 and 322 of the spring gear 32 are curved in an arc toward the center, and the repin 37 can be smoothly fitted into the notches 321 and 322.

By appropriately changing the shape of the cuts 321 and 322, the rotation angle and rotation speed of the auxiliary arm 4 can be changed.

FIG. 11 shows a third embodiment of the present invention. In the figure, elastic t1'A302 is provided at the opening edges of the notches 321 and 322 of the Geneva gear 32, and the gear box 3
An elastic material 301 is provided on the inner wall of the Geneva gear 32.
The rotating ends of the two abut against each other. This structure reduces noise when the pin 37 fits into the notches 321, 322 and noise when the lever gear 32 operates.

A fourth embodiment of the present invention is shown in FIGS. 12 to 14. In FIGS. 12 and 13, the Geneva gear 32 is an elongated disk whose outer end has a large diameter, and a horseshoe-shaped elongated hole 324 is formed along the outer periphery of the end at the large diameter end. The pin 37 is inserted through this (FIG. 14). Both ends of the elongated hole 324 are connected to the notches 32 in each of the above embodiments.
It is formed in the same shape as 1.322, and the peripheral part connecting both ends is the movement of the pin 37'! '/ is required as an arc along the trace.

As the disc 361 rotates, the pin 37 moves and the Geneva gear 32 and the auxiliary arm 4 rotate.

This rotation causes the auxiliary arm 4 to become upright and pin 37
It stops while moving around the circumference of the elongated hole 324 (FIG. 13).

According to this structure, the U gear 32 is always positioned by the pin 37 near both ends of the elongated hole 324, and clj
The process in which the pin 37 moves to the circumference of the elongated hole 324 and the process in which the cam part 362 fits into the recess 323 are carried out smoothly and continuously.

A fifth embodiment of the present invention is shown in FIGS. 15 to 17. 15 and 16, the recess 3 of each of the above embodiments is located between the notches 321 and 322 of the Geneva gear 32.
23, an arcuate groove 325 is formed on the lower surface (FIG. 17). On the other hand, the cam portion 362 on the disc 361 has an arc shape along the circumference, and the cam portion 362 on the disk 361 is in an arc shape along the circumference.
In the figure), a cam portion 362 fits into the groove 325 to hold the arm 4 in an upright position.

According to this structure, the detachment of the pin 37 from the notches 321 and 322 and the engagement of the cam portion 362 and the groove 325 are continuously and smoothly performed.

A sixth embodiment of the present invention is shown in FIGS. 18 to 20. In the figure, a″3 shows the Geneva gear 32 and the disc 361.
A lever 61 is disposed below the lever 61, and the base end of the lever 61 is rotatably supported on the wall of the gear case 3.
Due to the spring force of a coil spring 62 stretched between this and the case wall, it is brought into contact with the outer periphery of the cam portion 363 on the lower surface of the disk 361.

The cam portion 363 has a half circumference along the outer circumference of the disk 361, and the remaining half circumference is a circumferential surface recessed inward. A convex portion 611 is formed on the side surface of the lever 61, and a concave portion 326 is formed at one location on the outer periphery of the central axis of the Geneva gear 32.

When the pin 37 is inserted into the notch 32L 322 (FIG. 18), the lever 61 is in contact with the remaining half circumference of the cam portion 363, and the convex portion 611 is separated from the central axis of the Geneva gear 32. ing. In this state, the disk 36
1 rotates and the auxiliary arm 4 is in the upright position (19th
), the lever 61 comes into contact with the half circumference of the cam portion 363 and moves in the direction of the central axis of the U spring gear 32, and the convex portion 6
11 fits into the recess 326 of the Geneva gear 32 and the lever 6
Keep 1 upright.

In FIGS. 21 to 24, an electromagnetic clutch is used in place of the Geneva gear 32 in each of the above embodiments. A seventh embodiment of the present invention is shown.

In FIGS. 21 and 22, a rotation sensor 6 is provided at the #T, drive Ir1II31, ff2, and D'A portions, and the angle output signal of the sensor 6 is input to a control device (not shown).

A spur gear 38 is mounted on the outer periphery of the drive shaft 31 passing through the gear box 3, and the central cylindrical portion of the spur gear 38 is spline-coupled to the cylindrical portion 11114.1 of the auxiliary arm 4. ing. The gear 38 meshes with one of the gears 71 and 72 of the same diameter stacked above and below, d3 (Fig. 23),
The other of the gears 71 and 72 is located at the center of the float 35.
It meshes with a gear 39 fixed to 136.

As shown in FIG. 24, the gears 71 and 72 are equipped with electromagnetic clutches 73 and 74 having f4. In the figure, the electromagnetic clutch 73 is disposed between the center 'll1h 711 of the gearwheel 71 and the fixed 'I4175 fixed to the Gihefhox wall, and the electromagnetic clutch 74 is arranged between the center axis 711.721 of each gearwheel 71.72. It must be placed in

The other structure is the same as the first embodiment.

When the electromagnetic clutch 74 is activated by a control device (not shown) to connect the central shaft 711.721, the rotation of the drive shaft 31 is transmitted from the gear 33 to the auxiliary arm 4 via the gear 35.39.72.7L38. This can be rotated. When the electromagnetic clutch 73 is operated instead of the electromagnetic clutch 74, the connection between the center shafts 711 and 721 is released, and the center l1ill1711 is connected to the fixed shaft 75.
connected to. Therefore, the rotation of the drive shaft 31 is not transmitted to the auxiliary arm 4, and the auxiliary arm 4 is held at a predetermined rotational position by locking the central shaft 711 of the gear 71.

If the control device selectively operates the electromagnetic clutches 73 and 74 within a predetermined angle range detected by the rotation sensor 6, the same effects as in the embodiment described above can be obtained.

25 and 26 show an eighth embodiment of the present invention in which a non-circular planetary gear is used in place of the Geneva gear 32.

In FIG. 25, seven flange portions 311 are formed on the outer periphery of the gear box penetrating portion of the drive shaft 31, and the flange portions 31
1 is provided with a circular oscillating gear 91 and a non-circular planetary gear 92 at radially symmetrical positions. These gears 91.
92 are opposed to each other with the seven flange portions 311 interposed therebetween, and are supported by the reflange portion 311 on a common rotating shaft. The gear 91 meshes with the toothed portion 3a formed on the outer periphery of the circular protruding wall around the drive shaft 31, while the gear 92 meshes with the toothed portion 3a formed on the outer periphery of the circular protruding wall around the drive shaft
It meshes with a non-circular center tooth width 93 that is relatively rotatably inserted into the tooth. The gear 93 is spline-coupled to the support shaft 41 of the auxiliary arm 4.

As shown in FIG. 26, the non-circular gear 92 has a non-circular portion 92a and a circular portion 92b that approximately bisect the outer periphery, and the pitch circle of the non-circular portion 92a is larger than that of the circular portion 92b. Further, the non-circular gear 93 has an outer circumference divided into approximately six equal parts, and has non-circular parts 93a, 93G and a circular part 93b, and the pitch circle of each non-circular part 93a, 93G is smaller than that of the circular part 93b. It is.

When the drive shaft 31 rotates, the gear 92 rotates and revolves around the gear 93 (indicated by arrows in the figure).

Therefore, the non-circular parts 92a and 93a of both gears 92 and 93
, 93G, are in mesh with each other (Fig. 26 (
1), (3)), the rotational force is transmitted to the gear 93, causing it to rotate in the opposite direction to the -[distribution rotation direction. On the other hand, when the circular portions 92b and 9.3b of both gears 92.93 mesh with each other (Fig. 26 (2)), no rotational force is transmitted to the gear 93.
stops. As a result, the auxiliary arm 4 is temporarily stopped and held in an upright position during the rotation stroke of the wiper arm 5.

FIG. 27 shows a ninth embodiment of the present invention, in which the base end of the wiper plate holding fitting 51 is extended to just below the wiper arm rotation 11jIII42. According to this structure, the non-widable area at the center of the lower side of the window W as shown in FIG. 2 is eliminated.

[Brief explanation of drawings]

1 to 9 show a first embodiment of the present invention, in which FIG. 1 is a front sectional view of main parts of a wiper device, FIG. 2 is a front perspective view of a vehicle window equipped with a wiper device, and FIG. Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 1, and Figure 4 is a cross-sectional view along line IV-I in Figure 1.
5 is a sectional view taken along line V in FIG. 4, FIGS. 6 to 8 are front sectional views of main parts showing the operation of the device, and FIG. 9 is a sectional view showing the operation of the wiper arm. FIG. 10 is a schematic front view of a vehicle window showing the range, and FIG. 10 is a front sectional view of the main part of the wiper device without showing the second embodiment of the present invention. FIG. Front sectional views of main parts of the device, FIGS. 12 to 14 show a fourth embodiment of the present invention,
12 and 13 are front sectional views of main parts of the wiper device, FIG. 14 is a sectional view taken along line XIV-XIV in FIG. For example, FIGS. 15 and 16 are front sectional views of main parts of the wiper device, FIG. 17 is a sectional view taken along the line xvn-xvn in FIG. 16, and FIGS. 18 and 19 are front sectional views of main parts of the wiper device, FIG. 20 is a sectional view taken along the line xx-xX of FIG. 19, and FIGS. A seventh embodiment of the invention is shown,
Fig. 21 is a side sectional view of the main part of the wiper device, Fig. 22 is a sectional view taken along line xxn-xxrt in Fig. 21, Fig. 23 is a sectional view taken along line xxm-xxm in Fig. 22, and Fig. 24. is a cross-sectional view of a gear equipped with an electromagnetic clutch, Fig. 25, Fig. 2
FIG. 6 shows an eighth embodiment of the present invention, FIG. 25 is a side sectional view of the main part of the wiper device, FIG. 26 is a front view of the planetary gear mechanism, and FIG. 27 is a ninth embodiment of the present invention. FIG. 3 is a schematic front view of the vehicle window showing the operating range of the wiper arm in the vehicle window. W...Front window P...Body panel...Drive motor (drive source) 3...Gear box 31...Drive shaft 32... ... Vigner gear 321.322 ... Notch 323 ... Arc-shaped recess 324 ... (Friend hole 325 ... Arc-shaped groove 326 ... ...Recessed portion 361...Disk 362...Cam section 37...Pin 4...Auxiliary arm 41...Supporting arm 42. ...Time 11 43.44.45...Gear 5...Gear/wiper arm 61...Lever 611...Protrusion 71.72... ...Gear 73,74......Electromagnetic clutch 92...Planetary gear 93...Central gear 9th W 11th Fig. 12 Fig. 15 Fig. s18 Fig. Figure 25 Figure 26: jtD 2'7th

Claims (10)

[Claims] (1) A support shaft (41) is provided protruding from one end, and the support shaft (41) is rotatably supported by the vehicle body (P),
At the other end is a rotating shaft (
42) rotatably provided thereon, and rotating shaft drive means (31), (43), (44), (45) for rotationally driving the rotating shaft (42) of the wiper arm (5). and a support shaft driving means (32) for rotationally driving the support shaft (41) of the auxiliary arm (4) and stopping the rotational drive of the support shaft (41) within a predetermined angular range of the rotation shaft (42);
A wiper device for a vehicle comprising (33), (35), (36), and 37). (2) The rotating shaft driving means and the supporting shaft driving means are connected to a common drive source, and the supporting shaft driving means has a clutch means for disconnecting the supporting shaft and the driving source within a predetermined angular range of the rotating shaft. A wiper device for a vehicle according to claim 1, comprising: (3) The support shaft of the auxiliary arm is formed into a cylinder, and the drive shaft constituting the rotary shaft drive means is inserted into the cylinder, and one end of the drive shaft located on the side of the auxiliary arm is connected to the rotation transmission mechanism. The wiper device for a vehicle according to claim 2, wherein the wiper device is connected to the rotating shaft of the wiper arm and the other end of the drive shaft located on the body side is connected to the drive source. (4) The clutch means is composed of a Geneva gear fixed to the support shaft and a pin eccentrically provided on a rotating disk connected to the drive source, and A wiper device for a vehicle according to claim 2, wherein the Geneva gear and the pin are disengaged from each other. (5) The Geneva gear is provided with notches extending toward the center at two locations in the circumferential direction so that the pin fits into one of the notches outside the predetermined angle range, and there is a groove between the two notches. An arcuate recess is provided that curves backward toward the center, and a semicircular cam portion is provided at the center of the disk with a circumferential surface facing the back side of the pin, and the pin is engaged with each notch. 5. The wiper device for a vehicle according to claim 4, wherein the circumferential surface of the cam portion slides into the recess in the predetermined angular range in which the misalignment is resolved. (6) The Geneva gear is formed into an oval shape, the inner end thereof is fixed to the support shaft, and the outer end is formed with a horseshoe-shaped hole with both ends facing toward the center and into which the pin is inserted;
An arcuate recess curved toward the center is provided between the two ends, and a semicircular cam portion is protruded from the center of the disk with the back side facing the pin as the circumferential surface. is located at and engaged with one end of the punched hole outside the predetermined angular range, and within the predetermined angle, the pin moves within the circumferential portion of the punched hole without resistance and enters the recess. 5. A wiper device for a vehicle according to claim 4, wherein the peripheral surface of the cam portion is slidably inserted into the cam portion. (7) The Geneva gear is provided with notches extending toward the center at two locations in the circumferential direction so that the pin fits into one of the notches outside the predetermined angle range, and there is a groove between the two notches. An arcuate groove curved toward the center is provided, and an arcuate cam portion is protruded from the circumferential surface of the disc at a position symmetrical to the pin, and the predetermined angular range within which the engagement between the pin and each notch is released. A wiper device for a vehicle according to claim 4, wherein the cam portion is slidably fitted into the groove. (8) The Geneva gear is provided with notches extending toward the center at two locations in the circumferential direction so that the pin fits into one of the notches outside the predetermined angular range, and
The support shaft for fixing the Geneva gear is provided with a recess at one location in the circumferential direction, and a swingable lever is provided between the disc and the support shaft, and one side of the lever is provided in the disc. In the predetermined angle range in which the engagement between the pin and each notch is released, the lever is pushed toward the spindle by the cam part, and the lever is protruded from the other side of the lever. A wiper device for a vehicle according to claim 4, wherein the convex portion is fitted into the concave portion. (9) A wiper device for a vehicle according to claim 2, wherein the clutch means is an electromagnetic clutch that is de-energized within a predetermined angular range of the rotating shaft. (10) A wiper device for a vehicle according to claim 2, wherein the clutch means is constituted by a planetary gear mechanism that stops power transmission within a predetermined angular range of the rotating shaft.