JPS5914377B2 - Windshield wiper device for hatchback type rear gate door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a windshield wiper device, and particularly to a windshield wiper device applied to a batch-back type rear gate door.

In recent years, automobiles equipped with batch-back type rear gate doors have been equipped with windshield wiper devices for the rear gate door, but since these wiper devices are assembled into the frame of the rear gate door, the weight of the rear gate door has increased. Therefore, the rigidity and strength of the door hinge must be increased, which further increases the weight of the door and requires a larger input when opening and closing the door.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and an object of the present invention is to provide a windshield wiper device that minimizes the increase in weight of a rear gate door.

The windshield wiper device for a batch-back rear gate door according to the present invention includes a motor, a worm gear and a worm wheel rotated by the motor, and is connected to the worm wheel via a crank lock so as to swing according to the rotation of the worm wheel. a swinging shaft supported by a door frame and having an end face facing the passenger compartment facing the swinging member; and a wiper arm supported by the swinging shaft. , a wiper blade supported by the wiper arm is provided on the rear gate door side, and a protrusion for positioning and a protrusion for power transmission are provided on each opposing end surface of the swing member and the swing shaft on either side of the blade. and a fitting hole into which these protrusions fit is formed on the other side, and when the rear gate door is closed, the swinging member and the swinging shaft are brought close to each other so that the positioning protrusion and the power transmission When the protrusion for the purpose is aligned with the corresponding fitting hole, the protrusion and the fitting hole are engaged to establish a connection between the swinging member and the swinging shaft. Only the wiper arm is provided on the door side, which minimizes the increase in the weight of the door.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the rear part of an automobile 2 incorporating a wiper device 1 of the present invention.

As shown in the figure, a wiper arm 6 of a wiper device 1 is swingable about a swing shaft 7 at the center of the lower part of a door frame 5 that supports a windshield glass 4 in a hatchback type rear gate door 3 of an automobile 2. is supported by

FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG. The plate 10 to be merged is coaxially and integrally supported at the protruding end.

This engaged plate 10 has dog teeth 11 arranged at a constant angle position on the end surface Kg on the side of the vehicle compartment 9,
This dog tooth 11 is used when the door 3 is closed as shown in FIG. 3 from the open state as shown in FIG.
Fitting hole 14 of retaining plate 13 provided on vehicle body 12 side
The engaged play HOg and the engagement plate 13
are connected in the rotational direction.

The engagement plate 13 is rotatably supported by a shaft 16 attached to the inside of the vehicle body 12 and fixed to a fixed housing 15.

Further, the locking plate 13 is provided so as to be slidable in the axial direction with respect to the shaft 16, and is biased outward (towards the locked plate 10) by a spring 17.

A gear portion 18 is formed on the outer periphery of the engagement plate 13, and this gear portion 18 is connected to the rocking gear 1 as shown in FIG.
It meshes with 9.

This swing gear 19 is connected to a worm wheel 21 via a crank rod 20, and the rotation radius of the connection point between the crank rod 20 and the worm wheel 21 is larger than the rotation radius of the connection point between the crank rod 20 and the swing gear 19. Due to its small size, it swings as the worm wheel rotates.

The worm wheel 21 is engaged with a worm gear 24 connected to a rotating shaft 23 of a motor 22, and is driven to be decelerated by the motor 22.

Reference numeral 21A indicates a support shaft of the worm wheel.

The dog teeth 11 of the plate 10 to be secured and the fitting holes 14 of the retaining plate 13 are arranged at certain angular spacing positions as shown in FIG. 5 so that the angular positions at which they engage are -. It is located.

If n fitting holes are provided at equal angular intervals, n must be limited to n (36 or more/θ) for the entire operating angle θ of the wiper arm.

This is a requirement to prevent the dog teeth from fitting into other fitting holes that do not correspond to the wiper arm, even if the wiper arm is stopped at any position within its entire operating angle range.

Since it is L, if it is provided at positions with unequal angular intervals, n will not be limited by the above inequality.

In the figure, reference numeral 26 indicates a seal/cushion member provided around the opening 21 of the vehicle body 12, and 28 indicates a rubber member provided between the door frame 5 and the shield glass 4.

Next, the operation of the above-mentioned beautiful device will be explained.

As shown in FIG. 2 (when the door 3 is closed, the dog teeth 11 of the bonded plate 10
comes into contact with.

At this time, if the dog teeth 11 and the fitting hole 14 are at the same angular position around the axis, they will fit together immediately, but if they are misaligned, the dog teeth 11 will cause the retaining plate 13 to resist the spring 11. For example, it is pushed into the position shown by the two-dot chain line 13A in FIG.

When the motor 22 is driven in this state, the worm gear 24,
The worm wheel 21 is rotated, and the swing gear 19 connected to the worm wheel 21 via the crank rod 20 begins a swing motion.

When the swing gear 19 swings, the engagement plate 13 connected to it via the gear portion 18 also swings, and when rotated to an appropriate position, the fitting hole 14 of the engagement plate 13 is connected to the engaged plate 10. It fits into the dog teeth 11 of.

Therefore, the retaining plate 13 is pushed back by the spring 11 to the position shown in FIG.

Therefore, even if the wiper arm 6 moves and the dog tooth 11 is moved to a position where it does not fit into the fitting hole 14 while the door 3 is open, the two are easily connected by the clutch action of the retaining plates 10H and 13. This allows the wiper arm 6 to be swung regardless of its initial position.

Further, the shock when the door 3 is closed can be absorbed by the spring 17.

Next, a second embodiment of the invention shown in FIG. 6 will be described.

FIG. 6 is an exploded sectional view showing the clutch portion of the wiper device.

In this embodiment, the oscillating motion is transmitted to the oscillating shaft 7 by a cone clutch.

That is, a tapered cone 30 is coaxially and integrally provided at the tip of the swing shaft 7, and a tapered hole 31 into which the cone 30 fits is formed in the secured plate 10.

Further, dog teeth 32 are provided on the outside of the cone 30, and fitting holes 33 are provided on the surface facing the cone 30 outside the tapered hole 31.
are formed respectively.

In this embodiment, the dog teeth 32 and the fitting hole 3
3 regulates the locking position of the swing shaft 7 and the engagement plate 13, and the transmission of the swing motion is performed between the cone 30 and the tapered hole 3.
Transmitted by the fitting of 1.

The other configurations and operations are the same as those of the embodiment shown in FIGS. 2 to 5, so their explanation will be omitted.

Next, a third embodiment of the present invention shown in FIG. 7 will be described.

In this third embodiment, the engaged plate 10 and the merging plate 13 are engaged with each other using electric knives.

That is, the fixed plate 10 is formed of a magnetic material, and a foundation coil 35 is provided on the fixed plate 13 side.

This electromagnetic coil 35 is connected to the drive switch (
Electricity is supplied from a power supply circuit (not shown) that conducts electricity to a power supply circuit (not shown) and turns it on and off.

In the figure, reference numeral 36 indicates positioning dog teeth provided on the secured plate 10, and 37 indicates a fitting hole provided on the secured plate 13, respectively.

Further, reference numeral 38 indicates a cord to the electromagnetic coil 35, and this cord 38 is formed so as to be able to withstand the swinging motion of the merged blade 13 within a certain range.

In this embodiment, the motor 22 is driven, and the foundation coil 35 is excited by energization, whereby the plate 10 to be secured is attracted to the securing blade 13, and the engaging plate 1
3 of the rocking movements can be transmitted to the merged plate 10.

In this case, positioning of both is performed by fitting the dog teeth 36 and the fitting holes 37.

In the embodiment shown in FIG. 7, the swing motion is transmitted by the action of the electromagnetic coil 35.
A permanent magnet may be used instead of 5.

In each of the above embodiments 2, the rotational motion from the motor 22 is converted into a rocking motion by the crank rod 20 provided between the worm wheel 21 and the rocking gear 19, and this is transmitted to the retaining plate 13. However, the conversion to rocking motion may be achieved by connecting the worm wheel 21 and the retaining plate 13 with a crank rod 39, as shown in FIG.

In this case, in order to avoid interference between the crank rod 39 and the engaged plate 10, it is preferable that the operating angle of the coupled plate 10, the swing shaft 1 integral therewith, and the wiper arm 6 be 180 degrees or less.

Further, in each of the above embodiments, the engaged plate 10 and the retaining plate 13 are configured to be positioned or to transmit power through dog teeth and fitting holes formed on their opposing surfaces. As shown in FIG.
A fitting hole 41 that fits into the hole 0 at a fixed position may be provided.

In this case, the dog teeth 40 become resistant to wear and the like.

Further, in each of the above embodiments, the swing axis of the wiper arm is supported by the frame of the rear gate door, but in the case of a rear gate door made only of glass or synthetic resin plate without a frame in sports type cars, light cars, etc. As shown in FIG. 10, the bearing 8 of the swing shaft 7 may be supported via a rubber bush 42.

Furthermore, in each of the above embodiments, since the wiper mechanism on the door side is very small, the swing axis of the wiper arm can be provided on the glass, and therefore it can be applied to a rear gate door without a door frame.

As described above, the present invention provides a windshield wiper device for a batchback type rear gate door including a motor,
A worm gear and a worm wheel rotated by the motor, and a rocking member connected to the worm wheel via a crank rod and configured to rock according to the rotation of the worm wheel are provided on the vehicle body side, respectively, and a door frame is provided on the vehicle body side. a swing shaft supported by the swing shaft and having an end face facing the vehicle interior facing the swing member, a wiper arm supported by the swing shaft, and a wiper blade supported by the wiper arm, each provided on the rear gate door side; Further, each opposing end surface of the swinging member and the swinging shaft is provided with a protrusion for positioning and a protrusion for power transmission on either side of the blade, and a fitting hole into which these protrusions are fitted on the other side. is formed,
When the rear gate door is closed, the swing member and the swing shaft approach each other and the positioning protrusion and the power transmission protrusion align with correspondingly provided fitting holes. Since these protrusions and the fitting hole are engaged to establish a connection between the swinging member and the swinging shaft, only the wiper arm is provided on the door side, which increases the weight of the door. This has the excellent effect of minimizing the amount of noise and ensuring reliable opening/closing of the rear gate door.

In addition, since the rocking member and the rocking shaft are connected to each other by using a protrusion and a fitting hole on their opposing surfaces, for example,
Compared to the driven gear and drive rack connection structure disclosed in Japanese Patent No. 4929, this structure not only ensures reliable power transmission but also has a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the rear part of an automobile in which a wiper device according to the present invention is implemented, Fig. 2 is an enlarged sectional view of the main part along line ■-If in Fig. 1, and Fig. 3 is a door of the same embodiment. 4 is a cross-sectional view showing the closed state of the clutch, FIG. 4 is a view taken along the line ■-■ in FIG. 2, FIG. 5 is a plan view showing the dog teeth portion, and FIG. FIG. 1 is an exploded sectional view showing the clutch part of the third embodiment of the present invention;
FIG. 8 is a sectional view showing a modified example of the rocking motion conversion mechanism of the invention, FIG. 9 is an exploded perspective view showing another embodiment of the clutch mechanism, and FIG. 10 is a cross-sectional view showing another embodiment of the clutch mechanism. It is a sectional view showing a part. 1... Wiper device, 2... Driving vehicle, 3... Rear gate door, 4... Windshield glass, 6...
Wiper arm, 1... Swing shaft, 10... Engaged plate, 11... Dog teeth, 12... Vehicle body, 1
3... Retention plate, 14... Fitting hole, 17...
Spring, 19... Rocking gear, 20... Crank rod, 22... Motor, 32... Dock teeth, 33
...Fitting hole, 36...Dock teeth, 31.41
...Mating hole.

Claims (1)

[Claims] 1. A motor, a worm gear and a worm wheel rotated by the motor, and a swing member connected to the worm wheel via a crank ring and configured to swing according to the rotation of the worm wheel are each provided on the vehicle body side. , on the other hand, a swing shaft supported by a door frame and having an end face facing the vehicle interior facing the swing member, a wiper arm supported by the swing shaft, and a wiper blade supported by the wiper arm are respectively connected to a rear gate door. A protrusion for positioning and a protrusion for power transmission are provided on either side of the blade and on each opposing end surface of the swing member and the swing shaft, and these protrusions are fitted on the other side. When the rear gate door is closed, the swing member and the swing shaft approach each other, and the positioning protrusion and the power transmission protrusion are provided correspondingly. A batch-back type rear gate door characterized in that, when aligned with the fitting hole, these protrusions and the fitting hole are engaged to establish a connection between the swinging member and the swinging shaft. Windshield wiper device.