JPS61247543A - Hydraulic coupling attached to wiper arm operating shaft bolt with window detergent solution spouting mechanism - Google Patents

Abstract

PURPOSE:To make leakless detergent solution feeding performable, by connecting a detergent solution feed pipe to an inner side end of a wiper arm operating shaft bolt via a hydraulic coupling consisting of a ceramic molded rotary passage part and a fixed passage part. CONSTITUTION:In case of a device which attaches a wiper arm part 28 to a tip end of a wiper arm operating shaft bolt 30 rotatably supported on a body part 31 via a bearing 24 and installs a detergent solution spouting nozzle 29 in a tip end face of the bolt 30, a detergent feed pipe 18 is connected to the other end of the bolt 30 via a hydraulic coupling consisting of a rotary passage part A and a fixed passage part B made of ceramic moldings each. The rotary passage part A is made up of installing a convex setting part 15 to be fitted in the setting part 15 concavely installed in an end face of the bolt 30 and a concave part 1 to be fitted in a convex part 2 of the fixed passage part B. Likewise, the fixed passage part B is made up of installing the convex part 2, a rotational guide concavity 6 and a pipe inserting part 8, and locked to a body part 14 by means of a flat-platelike spring C.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a fluid coupling installed in an internal flow path of a wiper arm operating shaft bolt having a window cleaning liquid ejection mechanism in an automobile or the like.

(b) Conventional technology In conventional automobiles, etc., in order to install a windshield cleaning liquid ejection mechanism on the wiper arm actuating shaft bolt, an efficient fluid coupling was required to connect the fixed flow path and the rotating flow path because the actuating shaft bolt rotates. Nakatsuta.

(c) Problems to be Solved by the Invention Therefore, the present invention provides a method to prevent the windshield cleaning liquid from leaking from the flow path fixed to the internal flow path of the rotating wiper arm actuating shaft bolt. The purpose is to obtain a joint.

(d) Means for solving the problem A rotary flow path part (A) made of cylindrical ceramic molding and a fixing part ( B), a fluid coupling made of a flat spring material (C) is installed, and the cleaning liquid is transferred onto the rotating operating shaft bolt through a pipe from the pump chamber.

(E) Function: With the above-described construction, the cleaning liquid from the fixed flow path can be transferred to the flow path inscribed in the rotating wiper arm operating shaft bolt.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings.The rotating flow path section A and the fixed section B are molded from ceramic. This takes full advantage of ceramic's ability to withstand wear, heat, and corrosion.

The flow pipe joint convex portion 2 of the fixed part B is inserted into the flow pipe joint concave portion of the rotating flow path portion A, and the flow pipe grooves 3 and 4 are connected to move the fluid.

As a result, the rotation guide convex 5 enters the rotation guide recess 6 and coats the oil groove 7 with semi-solid lubricating oil, allowing the rotation passage section A and the fixed section B to rotate freely and preventing fluid leakage. Drill a hole 9 in the flat spring material C in the same shape as the pipe insertion part 8, fit the rotation stop protrusion 11 into the rotation stop recess 10, screw it to the appropriate vehicle body part 14 through the mounting holes 12 and 13, and fix the fixing part B. Stop the rotation and press lightly in the direction of the rotating flow path section A to bring the concave and convex portions of the flow pipe fitting into close contact, prevent frictional heat, prevent the fixing part B from coming off, and facilitate attachment and detachment of the rotating flow path section A. Insert the shaft bolt mounting portion 15 into the fluid coupling mounting portion 16 by inserting the gasket 17.

Connect the fixed part B to the pipe insertion part 8 and the pipe 18 from the pump chamber.
19, thereby making it possible to guide the cleaning liquid to the flow pipe 20 inside the actuating shaft bolt without force and without leaking the cleaning liquid.

(g) Effects As described above, the present invention makes full use of the characteristics of ceramic through the above-described structural action to move the fluid coupling without leaking the cleaning fluid, thereby reducing cost and increasing the service life. This is an epoch-making effect in that the window cleaning jetting mechanism can be incorporated into the wiper device body.

[Brief explanation of drawings]

The figure shows an embodiment of the fluid coupling of the present invention, and FIG. 1 is an exploded sectional view of the fluid coupling main body. FIG. 2 is a longitudinal sectional view showing a fluid coupling attached to the wiper arm operating shaft bolt. A, Rotating channel section, B, Fixed part, C, Flat spring 1, Flow pipe joint concave, 2, Flow pipe joint convex, 3, 4 Flow pipe, 5, Rotation guide convex, 6, Rotation guide concave, 7 Oil groove, 8, pipe insertion part, 9,
Mounting hole, 10, rotation stop concave, 11 rotation stop convex, 12, 1
3, mounting hole, 14, vehicle body part, 15, operating shaft bolt mounting part, 16, fluid coupling mounting part, 17, packing, 18,
Pipe 19, pipe attachment part, 20, flow tube, 21, drive rod part 22, bearing fixing part, 23, oil groove, 24, bearing, 2
5, Ring pin, 26, Anti-slip groove, 27, Arm locking nut 28, Arm part, 29, Spout port, 30, Wiper arm operating shaft bolt, 31, Vehicle body part

Claims (1)

[Claims] The operating shaft bolt has a window cleaning liquid ejection mechanism on the wiper arm operating shaft bolt.The operating shaft bolt has a rotary flow channel part (A) made of cylindrical ceramic molding, a fixed part (B), and a flat spring material (
C) A fluid coupling characterized in that the fluid coupling consisting of: is attached and the cleaning liquid is transferred onto the rotating operating shaft bolt by a pipe from the pump chamber.