Vehicle rear windshield wiper device

Wednesday, 24 July 2013

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Vehicle rear windshield wiper device

 

Abstract
A wiper blade is pivotally coupled to a main gear rotatably mounted via a wiper arm and abuts the rear window of a vehicle. Rods first and second gear are provided in spaced parallel coplanar flanking the main landing gear. The first and second worm gears are fixed to first ends of the first and second screw rods, respectively, each on a side of the master gear. A supporting device pivotally mounted support rod gear with the first and second worm gears on diametrically opposite sides of the main gear. An actuator is coupled to the transmission rods for rotating the first and second worm gears. An electromagnetic control device is coupled to the support device for reciprocating the first and second worm gears in mating relationship with the main gear thereby rotating the main gear alternately clockwise and counter-clockwise and move the sheet wiper in a wide arc.

DescriptionBackground of the InventionThe present invention relates to a windscreen wiper device of the vehicle. More particularly, the invention relates to a vehicle rear-window wiper device for a vehicle having a rear window.Objects of the invention are to provide a device of the vehicle rear wiper simple structure, which is inexpensive in manufacture, easily installable in new and existing vehicles, and functions efficiently, effectively and reliably to provide ample windshield washer function arc to the rear window of a vehicle.BRIEF DESCRIPTION OF THE DRAWINGSIn order that the present invention may be readily carried into effect, will now be described with reference to the accompanying drawings, in which:. Figure 1 is a view of a rear window of a vehicle that uses the wiper device of the invention;. Figure 2 is a perspective view of an embodiment of the rear windscreen wiper device of the vehicle of the invention;. Figure 3 is a circuit diagram of the rear windscreen wiper device of the vehicle of the invention;. Figure 4 is a top view of the embodiment of FIG. 2, and. Figure 5 is a schematic diagram explaining the operation of the embodiment of FIG. Two.DETAILED DESCRIPTION OF THE INVENTIONThe rear windscreen wiper device for vehicles of the invention is for a vehicle 1 having a rear window 2 (Figs. 1 and 2).Wiper device of the invention comprises a main gear rotatably mounted 3 (Figures 2, 4 and 5).A wiper blade 4 is pivotally coupled to the main gear 3 via a wiper arm 5 (Figs. 1 and 2) and abuts the rear window 2 of the vehicle 1. First and second gear rods 6 and 7 (Figure 2) are provided in a parallel spaced relation flanking substantially coplanar with the main gear 3.The first and second worm gears 8 and 9 (Figs. 2, 4 and 5) are attached to first ends of the first and second gear rods 6 and 7, respectively, each on a corresponding side of the main gear 3.A support member pivotally mounted crank or 10 (Figures 2, 4 and 5) supports the gear rods 6 and 7 with the first and second worm gears 8 and 9 on diametrically opposite sides of the main gear three.An actuator is coupled to the gear rack 6 and 7 for rotating the first and second worm gears 8 and 9 in the same direction around the axes of said gear rods. The actuating device comprises a motor 11 (Figs. 2 and 3). A drive gear 12 (Figures 2, 4 and 5) is coupled to and driven by the motor 11. A first planetary gear 13 is fixed to a second end of the first rod 6 and gear coupled to and driven by the drive gear 12, as shown in FIGS. 2, 4 and 5. A second planetary gear 14 is secured to a second end of the second rod 7 and gear coupled to and driven by the drive gear 12, as shown in FIGS. 2, 4 and 5.An electromagnetic control device is coupled to the support member or bell crank 10 to reciprocate the first and second worm gears 8 and 9 in mating relationship with three main gear thereby rotating the main gear alternately clockwise and to the left and move the wiper blade 4 in a wide arc as shown in Fig. 1. The electromagnetic control device comprises a control link 15 (Figures 2, 4 and 5) attached to the bell crank 10 at its center and having first and second opposite ends 16 and 17 (Figure 2). A first solenoid device 18 is provided in operative proximity with the first end 16 of the control connection 15 (Figures 2, 4 and 5). A second solenoid device 19 is provided in operative proximity with the second end 17 of the control connection 15 (Figures 2, 4 and 5). The first and second solenoids 18 and 19 are shown in Fig. Three. As shown in the figures. 2 and 3, a pair of switching devices 20 and 21 are operated by the wiper arm 5 for alternately activating the first and second solenoid devices 18 and 19, respectively. An on-off switch 22 controls energization of the motor 11 from an electrical source 23 which may comprise the battery of the vehicle 1.In operation, when the wiper arm 5 is at one end of its arc and the contacts of the switching device 20, the first worm gear 8 is moved into engagement with the main coupling 3 first solenoid activation 18, and the wiper arm is rotated by said main gear in a clockwise direction until it reaches the other end of its arc and contacts the second switching device 21. When the wiper arm 5 in contact with the second switching device 21, the second worm gear 9 is moved to mating engagement with the main gear 3 by activation of the second solenoid 19 and said main gear arm moves the blade in a counterclockwise direction until it returns to the end of the arc adjacent to the first switching device 20. The cycle then repeats.While the invention has been described by a specific example and in a specific embodiment, not to be limited thereto, for obvious modifications will occur to those skilled in the art without departing from the spirit and scope of the invention.