KR100368920B1 - Four link type wiper arm for an automobile - Google Patents

Abstract

The present invention relates to a four-section wiper arm for automobiles that can extend its life by increasing the durability by fixing the arm head to the link using a plastic bush, the first arm head 20 coupled to the wiper link and A connecting link fluidly coupled to the first arm head 20 and the second arm head 30 by a second arm head 30 and first and second hinge pins 22, 32; 10), the retainer 12 is coupled to the link link 10 and the other end is coupled to the wiper blade 40 via the arm piece 18, and provides a pressing pressure to the retainer to provide the wiper blade 40 In the four-section wiper arm consisting of an arm spring to maintain the state in close contact with the surface of the windshield, the outer link surface of the first and second hinge pins, the plastic is connected to the connecting link 10 by a first projection Bush 40 is fitted, the plastic A cap 44 is disposed on the inner side of the upper protrusion 44 of the tick bush 40 to prevent the inflow of foreign substances, and a lower portion of the cap 44 presses the washer 54 and the washer 54. 56) has a structure in which it is arranged.

Description

Section 4 wiper arm for car {FOUR LINK TYPE WIPER ARM FOR AN AUTOMOBILE}

The present invention relates to a four-section wiper arm for automobiles, and more particularly, to a four-section wiper arm for automobiles that can increase its durability and extend its life by fixing an arm head to a connection link using a plastic bush. will be.

In general, a windshield is fitted to the front of the vehicle to prevent inflow of wind or rainwater from the front while driving. When dust or dirt accumulates on the surface of the windshield, it is difficult to secure the view in front of the windshield. In particular, when driving in snow or rainy areas, it is necessary to remove the moisture on the surface of the windshield quickly. Can be. To this end, the vehicle is provided with a wiper device, which can remove dust and rain water on the surface of the windshield.

In the general configuration of the wiper system, the wiper motor, the wiper link operated by the wiper motor, the wiper arm rotated by the wiper link within a range of an angle, and the center part are fixed to the end of the wiper arm. When the wiper arm is moved, the wiper blade is wiped by wiping the surface of the windshield while moving within a range of angles along the surface of the windshield, thereby removing various dusts and foreign matters on the surface.

There is also a four-section wiper arm developed to widen the wiping area on the windshield. Section 4 wiper arm connects the two arm heads in a rotatable link, and then, when the wiper blade is positioned at the corner of the windshield, ensures that the wiper arm is stretched as far as possible to remove dust in a wider area. B. It has a structure to remove foreign substances.

That is, as shown in FIG. 1, the first arm head 20 and the second arm head 30 and the first arm head 20 and the second arm head 30 are operatively coupled to each other. It consists of a link link 10, a retainer 12 coupled to one end of the link link 10, and an arm piece 18 fixed to the tip of the retainer 12, the tip of the arm piece 18 The wiper blade 40 is rotatably fitted.

In addition, a first fastening hole 24 coupled to the wiper link is formed at the lower end of the first arm head 20, and a second fastening hole 34 coupled to the wiper link at the lower end of the second arm head 30. ) Is formed. These first arm head 20 and the second arm head 30 are movably coupled to the connecting link 10 by first and second hinge pins 22, 32. Although not shown, the bottom surface of the wiper arm is further provided with an arm spring for providing a pressing pressure to the retainer to maintain the wiper blade in close contact with the surface of the windshield.

The conventional four-section wiper arm having such a configuration has a weak coupling portion between the arm head and the connection link and has low durability, and causes a noise and a malfunction due to wear over a long period of time.

The present invention for solving this problem improves durability by inserting a plastic bush to the hinge pin for rotatably coupling the arm head and the connecting link, and at the same time can minimize the noise due to wear even long-term use The aim is to provide a four-section wiper arm for an automobile.

1 is a plan view showing the configuration of a typical four-section wiper arm,

Figure 2 is a cross-sectional view showing the assembly structure of the four-section wiper arm according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

10: link 20: arm head

22: hinge pin 40: bush

42, 44: protrusion 46: extension

50: O-ring 52: Tap

54: washer 56: spring

Section 4 wiper arm for automobiles of the present invention for achieving the above object is the first arm head and the second arm head coupled to the wiper link, the first arm head and the second by the first and second hinge pins A linker that is fluidly coupled to the arm head, a retainer that is coupled to the linking link at one end and coupled to the wiper blade via the arm piece, and provides a pressing pressure to the retainer so that the wiper blade adheres to the surface of the windshield In the four-section wiper arm consisting of an arm spring to maintain the closed state, the outer surface of the first and second hinge pins is fitted with a plastic bush to which the connecting link is coupled by a first projection, the upper portion of the plastic bush The inside of the projection is capped to prevent the inflow of foreign matter, the lower portion of the cap washer and the spring for pressing the washer is It is characterized in that the arrangement.

Hereinafter, a four-section wiper arm for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying FIG. 2.

Figure 2 is a cross-sectional view showing the assembly structure of the four-section wiper arm according to the present invention, the same parts as the structure described in Figure 1 will be described with the same reference numerals.

As also described in FIG. 1, the configuration of the four-section wiper arm for a vehicle includes a first arm head 20 and a second arm head 30 coupled to a wiper link, first and second hinge pins 22, A connecting link 10 movably coupled to the first arm head 20 and the second arm head 30 by one end 32, and one end coupled to the connecting link 10, and the other end of the arm piece 18. Retainer 12 is coupled to the wiper blade 40 via a), and the arm spring to provide a pressing pressure to the retainer to keep the wiper blade 40 in close contact with the surface of the windshield.

In the four-section wiper arm of such a configuration, to increase the coupling strength of the link link 10 is coupled to the first arm head 20 and the second arm head 30 and to improve the durability, of the present invention In the preferred embodiment, the plastic bush 40 is inserted into these coupling portions.

That is, when the center of the first hinge pin 22 shown in Figure 2 will be described, the outer surface of the first hinge pin 22 is inserted into the plastic bush 40 for coupling the connection link 10, this The upper portion of the plastic bush 40 is cap 52 to prevent the inflow of foreign matter. The lower knurled end 22 ′ of the first hinge pin 22 is injection molded integrally with the first arm head 20 and is firmly fixed.

Here, the groove 22b is formed at an intermediate point of the first hinge pin 22, and the horizontal protrusion 40a of the plastic bush 40 is inserted and fixed in the groove 22b. In addition, the O-ring 50 is inserted in the vicinity of the lower flange of the first hinge pin 22, the projection 48 to prevent the separation of the O-ring 50 in the plastic bush 40 is downward. It protrudes.

In addition, the outer periphery of the plastic bush 40 is formed with a first protrusion 42 extending inwardly vertically, thereby maintaining a coupling state with the connection link 10. Moreover, the 2nd protrusion 44 extended vertically upwards and opposing this 1st protrusion 42 is further formed. The cap 52 is inserted and fixed in these 2nd protrusions 44.

A washer 54 and a spring 56 for pressing the washer 54 are further installed below the cap 40 to block the inflow of foreign substances from the outside. Here, the washer 54 is arranged in the second projection 44 of the plastic bush 40.

In the hinge pin coupling structure of this structure, the vertical movement of the plastic bush 40 is restricted by the horizontal protrusion 40a of the plastic bush 40 inserted in the recess 22b of the first hinge pin 22. The horizontal movement of the plastic bush 40 is restricted by the first protrusion 42 inserted into the connection link 10. In addition, the plastic bush 40 is formed with an extended end 46 extending horizontally to increase the coupling force with the connection link (10).

In this way, the first arm head 20 is integrally injection molded by the lower knurled end 22 ′ of the first hinge pin 22, and the connecting link 10 is formed through the plastic bush 40. Since it is fixedly coupled to the one hinge pin 22, the plastic bush 40 operates smoothly and at the same time reduces friction to prevent wear.

According to the present invention described above, the plastic bush is fitted to the hinge pin for rotatably coupling the arm head and the connecting link to improve durability, and at the same time to minimize the noise due to wear even if used for a long time have.

Claims (1)

A first arm head and a second arm head coupled to the wiper link, a connecting link movably coupled to the first arm head and the second arm head by first and second hinge pins, and one end of the connecting link and In the four-section wiper arm consisting of a retainer coupled and the other end coupled to the wiper blade via the arm piece, and an arm spring providing a pressing pressure to the retainer to keep the wiper blade in close contact with the surface of the windshield. The outer circumferential surface of the first hinge pin 22 is fitted with a plastic bush 40 to which the connection link 10 is coupled by a first projection, Car cap 4 characterized in that the cap 52 is supported by the plastic bush 40, the spring 56 is pressed against the washer 54 to allow the first hinge pin 22 is pivotally supported. Section wiper arm.