JPH0132599Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is applied to a link connecting rod of a wiper device that allows the wiper arm and wiper blade to be swung by the wiper motor to wipe away raindrops etc. attached to the glass surface of a car. The present invention relates to an improvement in a link rod of a wiper device suitable for use.

(Prior Art) Link connecting rods used in conventional wiper devices have structures such as those shown in FIGS. 4 to 7, for example.

Figure 4 is a cross-sectional explanatory view of the main parts showing the positional relationship between the wiper motor and pivot provided on the cowl top panel, and Figure 5 is a cross-sectional view of the cowl top panel showing the state in which the wiper motor and pivot shown in Figure 4 are connected by a link connecting rod. Explanatory drawings viewed from the top of the panel, Figures 6A, B, and C are the A-A cross section and B-B cross section shown in Figure 5, respectively.
FIGS. 7A and 7B are explanatory views showing the cross-sectional shapes of the B section and the C-C cross section, and FIGS. 7A and 7B are explanatory views showing the shape of the link connecting rod.

In the figure, 1 is the cowl top panel;
The cowl top panel 1 consists of a horizontal wall surface 2 and a vertical wall surface 3, and a pivot 4 is provided on the horizontal wall surface 2 of the cowl top panel 1. This pivot 4
is composed of a pivot bearing 5, a pivot shaft 6, and a pivot arm 7, and the pivot bearing 5 rotatably supports the pivot shaft 6. The pivot shaft 6 has a threaded portion 8 on its upper part to which a wiper arm (not shown) is attached, and the pivot arm 7 is fixed on its lower part, and a ball joint 9 is provided on the upper surface of the pivot arm 7. .

A wiper motor 10 is provided on the vertical wall surface 3, and the wiper motor 10 is composed of a motor section 11, a reduction mechanism 12, an output shaft 13, and a motor arm 14, and the motor arm 14 is attached to the output shaft 13. and the motor arm 14
A ball joint 15 is provided on one side.

In the figure, reference numeral 16 denotes a link connecting rod, and this link connecting rod 16 is press-molded from a metal strip cut to a predetermined length.Both ends of the link connecting rod 16 are provided with flat portions 17 that are twisted with each other. Each flat portion 17 has a mounting hole 19 at the center thereof, into which a ball retainer 18 is mounted. Then, each flat portion 1 of the link connecting rod 16
A flange portion 20 is provided in the longitudinal direction of the link connecting rod 16, leaving the connecting rod 7, and this flange portion 20 has an opening portion 21 that changes to a substantially constant shape. .

In addition, 22 in the figure is an axis line, and this axis line 22 connects the intersection of the axial center line of each ball joint 19, 15 attached to the ball retainers 18, 18, respectively, and the plate thickness center of each plane part 17 to the pivot arm 7 side. This is a straight line connecting the motor arm 14 and the motor arm 14 side.

Next, how to install and operate the wiper device having the above configuration will be explained.

First, each mounting hole 1 of the link connecting rod 16
9 and 19 respectively, the ball retainer 18 at one end of the link connecting rod 16 is fitted into the ball joint 9 of the pivot arm 7, and the ball retainer 18 is attached to the other end of the motor arm 14. It fits into the ball joint 15 of. At this time, as shown in FIG. 4, the surface of the pivot arm 7 and the surface of the motor arm 14 are not parallel to each other, but the link connecting rod 16 is installed in a twisted position.

Then, when a wiper switch (not shown) is turned on, the motor section 11 of the wiper motor 10 is driven, and the output shaft 13 is rotated via the deceleration mechanism 12, causing the motor arm 14 to rotate. A link connecting rod 16 connected to the motor arm 14 via a ball joint 15 and a ball retainer 18 converts the rotational motion of the motor section 11 into a linear motion, and a ball retainer 18 at the other end of the link connecting rod 16 converts the rotational motion of the motor section 11 into linear motion.
The pivot arm 7 is reciprocally rotated via the ball joint 9, and at the same time, the wiper blade is swung via the pivot shaft 6 fixed to the pivot arm 7.

However, in the link connecting rod 16 of the conventional wiper device described above, when it is installed between the pivot arm 7 and the motor arm 14,
As shown in Fig. 6, the opening 21 of the link connecting rod 16 faces upward no matter what cross-sectional shape it has, so water from rain or car washing may accumulate in the opening 21, causing rust, etc. There is a problem that the durability of the link connecting rod 16 is significantly reduced, and since the axis 22 is located at the center of the plate thickness of the link connecting rod 16 no matter what cross-sectional shape it takes, as shown in FIG. There is a problem in that when stress is applied from both ends of the tube 16, the flat portion 17 receives a bending moment and is easily bent.

(Purpose of the invention) This invention was made by focusing on the problems of the conventional methods mentioned above. To provide a strong and highly durable link connecting rod for a wiper device, which does not allow water to accumulate or is easily bent even when an external force is applied from both ends of the link connecting rod.

(Structure of the invention) The structure of the link connecting rod of the wiper device according to this invention is such that a wiper motor is provided on the vertical wall surface of a cowl top panel having a vertical wall surface and a horizontal wall surface, and a pivot is provided on the horizontal wall surface. In the wiper device configured to connect the wiper motor with a link connecting rod to transmit the rotation of the wiper motor to the pivot, the link connecting rod has a cross-sectional shape at an arbitrary position in the longitudinal direction extending in the longitudinal direction of the link connecting rod. The link connecting rod has a shape formed around an axis, and is characterized in that the opening of the link connecting rod always faces sideways or downward with respect to the vertical direction of the vehicle body.

(Embodiment) FIGS. 1 to 3 are diagrams showing an embodiment of this invention.

Figure 1 is an explanatory diagram of the wiper device shown in Figure 4, with the wiper motor and pivot connected by a link connecting rod, viewed from the top of the cowl top panel. Each D-D
FIG. 3 is an explanatory diagram showing the shape of the link connecting rod.

In the figure, 31 is a link controller;
This link connecting rod 31 is press-formed in the same manner as before, and has planar portions 32 that are twisted with each other at both ends of the link connecting rod 31, and a ball retainer 33 is attached to the center of each of the planar portions 32. It has a mounting hole 34 for mounting. A tapered portion 35 is formed on the rod side of each plane portion 32 of the link connecting rod 31, and a flange portion is provided between each tapered portion 35 to provide strength and rigidity in the longitudinal direction of the link connecting rod. 36 is provided, and this flange portion 36 has an opening 37 that changes to a substantially constant shape. That is, in this link connecting rod, the flat portion 32,
The direction of the bottom part 38 gradually changes so that the part 32 is twisted, but the flange part 36 and the opening part 37 are always in the same direction.
It can be molded in one press process. In addition, 39 in the figure is an axis line, and FIG.
As shown in E and F, no matter which cross-sectional position the axis 39 is located inside the cross-sectional shape, the opening 37 always faces horizontally with respect to the vertical direction of the vehicle body.

The mounting and operating procedures of the link connecting rod of this embodiment are the same as those of the conventional one, and the pivot 4 of the cowl top panel 1 and the wiper motor 1 shown in FIG.
0 and transmits the rotation of the wiper motor 10 to the pivot 4.

(Effects of the invention) As explained above, according to this invention, a wiper motor is provided on the vertical wall surface of a cowl top panel having a vertical wall surface and a horizontal wall surface, and a pivot is provided on the horizontal wall surface, and the wiper motor and the pivot In a wiper device configured to connect the wiper motor with a link connecting rod to transmit the rotation of the wiper motor to the pivot, the link connecting rod has a cross-sectional shape at an arbitrary position in the longitudinal direction of the wiper connecting rod, which has an axis extending in the longitudinal direction of the link connecting rod. The opening of the link connecting rod always faces sideways or downwards with respect to the vertical direction of the vehicle body, so that rain or water from washing the car travels through the cowl top panel. Excellent effects such as improved durability and improved strength and rigidity of the link connecting rod are achieved by preventing rust from flowing or accumulating within the opening of the connecting rod.

[Brief explanation of drawings]

Fig. 1 is an explanatory view showing the state in which the link connecting rods of a wiper device according to an embodiment of this invention are connected, viewed from the top of the cowl top panel, Fig. 2 D, E,
F is line D-D, line E-E and F- in FIG.
Explanatory diagram showing each cross-sectional shape at line F, Figure 3 a, b
4 is an explanatory front view and a side view showing the shape of the link connecting rod, FIG. 4 is a sectional explanatory view of the main part showing how the wiper device is attached to the cowl top panel, and FIG. 5 is a diagram showing the connection of a conventional link connecting rod. An explanatory diagram showing the condition from the top of the cowl top panel,
Figures 6A, B, and C are explanatory diagrams showing the cross-sectional shapes taken along lines A-A, B-B, and C-C in Figure 5, and Figures 7a and b show the shape of the link connecting rod. FIG. 2 is a side explanatory view and a front explanatory view. 1...Cowl top panel, 2...Side wall surface, 3
... Vertical wall surface, 4 ... Pivot, 10 ... Wiper motor, 31 ... Link connecting rod, 35 ... Tapered portion, 37 ... Opening, 39 ... Axis line.

Claims (1)

[Scope of utility model registration request] A wiper motor is provided on the vertical wall surface of a cowl top panel having a vertical wall surface and a horizontal wall surface, and a pivot is provided on the horizontal wall surface, and the wiper motor and the pivot are connected by a link connecting rod to transmit the rotation of the wiper motor to the pivot. In the wiper device, the link connecting rod has a cross-sectional shape at any position in the longitudinal direction formed around an axis extending in the longitudinal direction of the link connecting rod, and an opening of the link connecting rod A link connecting rod for a wiper device, characterized in that a portion always faces sideways or downwards with respect to the vertical direction of a vehicle body.