KR200238756Y1 - Wiper linkage for an automobile - Google Patents

Abstract

The present invention forms a plurality of grooves in the retainer mounting hole to increase the contact area between the wiper ring cage of the steel material and the retainer of the plastic material in the molding process, thereby minimizing the micro clearances caused by the shrinkage caused by the solidification after injection, The present invention relates to a wiper link cage for a vehicle, which can prevent a gap and reduce noise. A retainer mounting hole (42) is formed in a coupling end portion (40a) of a ring cage body to which a ball pin is coupled through a retainer. The retainer mounting hole 42 is provided with a plurality of grooves 44 for increasing the contact area with the retainer.

Description

Car Wiper Link Cage {WIPER LINKAGE FOR AN AUTOMOBILE}

The present invention relates to a wiper ring cage for a vehicle, and more particularly, by forming a plurality of grooves in the retainer mounting hole, the contact area between the wiper ring cage of the steel material and the retainer of the plastic material is increased during the molding process, which is generated by solidification after injection. By minimizing the micro clearance by the contraction portion, and prevents the occurrence of gaps due to wear relates to a vehicle wiper ring cage that can reduce the noise.

Usually, a windshield for preventing the inflow of wind or rain from the front while driving is fitted in the front of the vehicle. 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 to remove dust and rain water on the surface of the windshield.

1 is a front view showing the configuration of a general wiper system. As shown here, in the overall configuration of the vehicle wiper device, the wiper motor 14 is fixed and pivots the operating force of the mounting plate 10 and the wiper motor 14 fixed to the vehicle body through a plurality of bushes. Wiper linkages 22 and 24 to be transmitted to the shaft 32, the pivot housing 30 to pivotally support the pivot shaft 32, and the mounting plate 10 is coupled to the intermediate portion and both ends It consists of a fixed pipe 20 to which the pivot housing 30 is coupled.

A motor shaft 16 protrudes from a lower portion of the mounting plate 10, and a drive link 18 is connected to the motor shaft 16. Here, one end of the drive link 18 is connected to the lower end of the motor shaft 16 by a nut, and the other end is connected to one end of the wiper ring cage 22 by a ball pin coupled through a retainer 21. It is. Therefore, when the motor shaft 16 starts to rotate by the wiper motor 14, the drive link 18 is rotated in accordance with the rotation of the motor shaft 16 to operate the wiper ring cage 22.

On the other hand, the other end of the wiper link cage 22 is coupled to the pivot plate 28 by a ball pin coupled via a retainer 26. In addition, one end of the other wiper link cage 24 is connected to the pivot plate 28 by a ball pin 27. The other end of the wiper ring cage 24 is connected to the opposite pivot plate 28, and the lower end of the pivot shaft 32 is press-fitted to the other end of the pivot plate 28.

Although not shown at the top of the pivot shaft 32, a wiper arm for operating the wiper blade is engaged. In addition, the pivot shaft 32 is rotatably mounted in the pivot housing 30. Mounting extension 36 is integrally formed in pivot housing 30. This mounting extension is firmly fixed to the vehicle body via the bush.

In the vehicle wiper system having such a configuration, when electricity is supplied to the wiper motor 14 according to the operation of the wiper switch, the drive link 18 starts to operate while the motor shaft 16 of the wiper motor 14 is rotated. do. As the wiper link cage 22 moves by the operation of the drive link 18, the wiper link cage 24 and the pivot plate 28 to which the wiper link cage 22 is coupled start to interlock.

Accordingly, the pivot shaft 32 on the right side of the drawing starts to rotate by the operation of the pivot plate 28, and the pivot shaft 32 on the left side of the drawing rotates by the operation of the wiper link cage 24. The wiper arm, which is coupled to the top of 32, is actuated to allow the wiper blade to rotate along the windshield surface.

2 and 3 are a front view and a plan view partially showing the engagement state of a conventional wiper link cage. As shown here, a retainer mounting hole 24 is formed in the coupling end portion 22a of the wiper ring cage 22, and the retainer mounting hole 24 is mounted with a retainer 21 made of plastic. The ball pin is coupled to the retainer mounting hole 24 via the retainer 21 at the time of assembly. That is, as the retainer is injected during the insert injection molding, the wiper ring cage is inserted and formed.

In the conventional vehicle wiper link cage having such a configuration, when a wiper is operated, a large load is transmitted to the wiper arm through the wiper link cage, and the play is gradually generated at the ball joint portion, resulting in deterioration of durability and severe noise. There is a problem.

The present invention for solving the above problems by increasing the contact area between the plastic retainer and the steel wiper link cage to suppress the occurrence of gap, the vehicle wiper link cage can reduce noise and improve durability during the wiper operation The purpose is to provide.

1 is a front view showing the configuration of a general vehicle wiper system,

Figure 2 is a front view showing a part of a state of engagement of a conventional wiper link cage,

3 is a plan view partially showing a conventional wiper link cage,

4 is a plan view partially showing a wiper link cage according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

21: Retainer 40: Wiper Link Cage

42: retainer mounting hole 44: groove

In the vehicular wiper ring cage of the present invention for achieving the above object, in the vehicular wiper ring cage for rotating the wiper blade by transmitting the operating force of the wiper motor to the wiper arm, the coupling of the ring cage body is coupled to the ball pin via the retainer A retainer mounting hole is formed at the end, and the retainer mounting hole is provided with a plurality of grooves for increasing the contact area with the retainer.

Hereinafter, a vehicle wiper ring cage according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying FIG. 4, and the same components as those of the conventional structure described with reference to FIG. 1 are denoted by the same reference numerals.

4 is a plan view partially showing the wiper link cage according to the present invention.

As described above, in the wiper system, power generated in the wiper motor is transmitted to the wiper arm through the wiper ring cage. The wiper arm rotates the wiper blade mounted at one end within a predetermined angle range according to the link motion of the wiper link cage. This allows the wiper blades to move along the windshield surface to remove snow or rain, or to remove dirt and dust.

In the vehicle wiper link cage of such a configuration, when the wiper is operated for a long time to prevent abrasion during the friction contact between the plastic retainer and the steel wiper ring cage, in the preferred embodiment of the present invention the retainer and the wiper The structure for increasing the contact area between the linkages is illustrated.

To this end, as shown in FIG. 4, a retainer mounting hole 42 is formed in the coupling end portion 40a of the wiper ring cage 40 to which the ball pin is coupled via the retainer, and the retainer mounting hole 42 is formed. In this case, a structure in which a plurality of grooves 44 (four in this embodiment) are formed for increasing the contact area with the retainer is employed.

Here, the grooves 44 formed in the retainer mounting holes 42 are equally arranged vertically and horizontally. In this way, since the grooves 44 are formed evenly on the upper, lower, left and right circumferential surfaces of the retainer mounting hole 42, the retainer mounting holes 42 of the wiper ring cage 40 have the same size as the grooves 44. The contact area of is increased. Therefore, by maximizing the area of the contact portion of the wiper ring cage 40 and the plastic injection portion of the steel material during the injection molding molding, the micro-gauge by the shrinkage that occurs during solidification after injection to minimize the retainer and the wiper link cage ( It is possible to fundamentally block the occurrence of gaps between them.

According to the present invention described above, by forming a plurality of grooves in the retainer mounting hole to increase the contact area between the wiper ring cage of the steel material and the retainer of the plastic material in the molding process to minimize the micro-gap caused by the shrinkage caused by the solidification after injection By doing so, there is an advantage that can reduce the noise by preventing the occurrence of gap due to wear.

Claims (2)

In the vehicle wiper ring cage for transmitting the operating force of the wiper motor to the wiper arm to rotate the wiper blade, A retainer mounting hole 42 is formed in the coupling end portion 40a of the ring cage body to which the ball pin is coupled via the retainer, and the retainer mounting hole 42 includes a plurality of grooves for increasing the contact area with the retainer. Vehicle wiper link cage, characterized in that 44). The method of claim 1, The groove 44 is a vehicle wiper ring cage, characterized in that evenly arranged up and down and left and right.