KR100368924B1 - Device for assembling bushes into a pivot housing of wiper - Google Patents

Abstract

The present invention relates to a bush assembling apparatus of a wiper pivot housing that can simply combine the sintered bush in the pivot housing in one step by using a press-fit jig having a bottom-extension pressurizing piece. A pressure rod having a recess, a first pusher installed on the upper outer circumferential surface of the pressure rod and pressurizing the first bush while the lower end thereof expands when inserted into the pivot housing; and a lower side of the first pusher through the first bush. And a second pusher which presses the second bush while the lower end thereof expands upon insertion into the pivot housing.

Description

Bush assembly device for wiper pivot housing {DEVICE FOR ASSEMBLING BUSHES INTO A PIVOT HOUSING OF WIPER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device for an automobile, and more particularly, a bush of a wiping pivot housing that can simply couple a sintered bush into the pivot housing in one step by using a press-fit jig having a bottom-extension pressing piece. It relates to an assembly apparatus.

Windshields are fitted on the front of the car to prevent wind from entering 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.

1 is an exploded perspective view of a conventional wiper device, the overall configuration of which includes a wiper motor 1, a drive link 2 operated by the wiper motor 1, and a connecting link 10. A pivot shaft 4 operatively connected to the drive link 2, a wiper arm 5 coupled to the upper threaded portion of the pivot shaft 4, and a central portion of which is fixed to the end of the wiper arm 5. When the wiper arm 5 is moved in a state, the wiper blade 6 is removed by wiping the windshield surface while moving within a range of angles along the surface of the windshield, thereby removing various dusts and foreign matter from the surface. consist of. When assembling the wiper arm 5, the hole 5a formed at one end thereof is fitted to the threaded portion of the pivot shaft 4, and then the nut 8 and the cover 9 are covered to block the inflow of foreign substances.

Next, FIG. 2 is a cross-sectional view for explaining a process of inserting a bush into a pivot housing in which a pivot shaft is rotatably mounted. In the conventional bush assembly process, first, the first bushing 10 is inserted into the upper portion of the pivot housing 4 by pressing with the press tool 14. Next, the second bushing 12 is also inserted into the lower portion of the pivot housing by pressing with the press-fit tool 16. Next, an evening step is performed to make the nonuniform inner diameter of the sintered bush constant.

According to the conventional bush assembly method of the wiper pivot housing having such a configuration, the bush is assembled in a number of steps such as inserting the bush at the upper part and inserting the bush at the lower part, pressurizing with the pressing tool, and finishing the inner diameter. As a result, the number of manufacturing processes is high, the assembly time is long, and the production cost is increased.

The present invention for solving the above problems can be fixed by inserting the bush in one step by using the press-fit jig having an extended pusher to reduce the number of manufacturing processes and to reduce the assembly time to reduce the production cost of the product It is an object of the present invention to provide a bush assembly of a wiping pivot housing.

1 is an exploded perspective view showing the configuration of a general wiper device

2 is a cross-sectional view for explaining a conventional bush assembly process,

3 is a cross-sectional view showing the configuration of the press-fit jig and pivot housing according to the present invention;

4 is a cross-sectional view showing a process of installing a bush in the pivot housing using the press-fit jig of the present invention,

Figure 5 is a cross-sectional view showing a process of removing the jig after the assembly of the bush.

♣ Explanation of symbols for main part of drawing ♣

4: pivot housing 10, 12: first, second bushing

20: Pressure rod 22, 24: Groove

30, 32: 1st, 2 pusher 30a, 32a: stopper

Bushing assembly of the wiper pivot housing of the present invention for achieving the above object is a first rod is installed on the upper outer peripheral surface of the pressing rod having a plurality of grooves, the lower end when inserted into the pivot housing when the first bushing And a first pusher for pressing the second pusher and a second pusher disposed below the first pusher via the first bushing and pressurizing the second bushing while the lower end thereof is extended when inserted into the pivot housing.

Hereinafter, with reference to the accompanying Figures 3 to 5 will be described in detail the bush assembly of the wiper pivot housing according to a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view showing the configuration of the press-fit jig and pivot housing according to the present invention, Figure 4 is a cross-sectional view showing a process of installing the bush in the pivot housing using the press-fit jig of the present invention, Figure 5 is after the assembly of the bush This is a cross section showing the process of removing the jig.

In the automotive wiper device, in view of the overall configuration of the bush assembling device of the present invention for inserting the bush into the pivot housing which pivotally supports the pivot shaft, a pressure rod having a plurality of grooves 22 and 24 is formed. (20) and the first and second pushers (30) and (32) coupled to the outer circumferential surface of the pressure rod (20). In assembling the bush, an upper first bush 10 is arranged between the first pusher 30 and the second pusher 32 as shown by a virtual line in FIG. 3. In addition, a lower second bush 12 is disposed below the second pusher 32 as shown in FIG.

At this time, the stopper 30a protruding from the inner side of the first pusher 30 is inserted into the groove 22 formed in the upper portion of the pressure rod 20, and the second pusher 32 is inserted into the groove 24a formed in the lower portion of the groove 22. The stopper 32a which protrudes in the inner side of the is inserted. In addition, the upper end of the first pusher 30 and the second pusher 32 of the present invention is fixed integrally, while the lower end is separated from each other, and formed elastically deformable, so that the stoppers 30a, 32a When it comes out of the grooves 22 and 24 and comes into close contact with the outer circumferential surface of the pressure rod 20, the first bushing 10 below the first pusher 30 and the second pusher 32 is opened. ) And the second bush 12 are pressed.

That is, when the pressing jig of the present invention is inserted into the pivot housing 4 in the direction of the arrow in a state where the first bushing 10 and the second bushing 12 are inserted in the state shown in FIG. The second bushing 12 is inserted into the upper portion of the pivot housing 4 and provides a repulsive force to the upper second pusher 32 by the frictional force with the inner surface of the housing so that the external first and second pushers 30, ( 32) restrain from falling. When the force is further applied to the pressure rod 20 in this state, the pressure rod 20 is pressed downward along the arrow direction P, and at the same time, the stopper of the second pusher 32 inserted into the recess 24 is formed. 32a) comes out of the groove 24 to be in close contact with the outer circumferential surface of the pressure rod 20, the lower end is expanded. At this time, the upper end is contracted while being in close contact with the outer circumferential surface of the pressure rod 20, and is supported by the first bushing 10 and the first pusher 30 so that the upper end is not raised. Although not shown in the upper portion of the first pusher 30, another second bush is continuously disposed and restrained from being raised.

When the pressure rod 20 is further lowered in this state, the second bush 12 is inserted while sliding downward along the inner wall of the pivot housing 4. Next, at the moment when the first bushing 10 is inserted into the upper end of the pivot housing 4, the lower end of the first pusher 30 is pressurized while being pushed in accordance with the principle as described above. When lowering further), the first bushing 10 and the second bushing 12 are moved downward together to the assembly position. In this process, the first bushing 10 and the second bushing 12 may be evenly trimmed while being in close contact with the outer circumferential surface of the pressure rod 20, so that the conventional inner diameter smoothing finishing operation may be omitted. In addition, by assembling the upper and lower bushes at the same time, the straightness can be optimized to improve the quality.

After the assembly of the first bushing 10 and the second bushing 12 is completed, when the pressure rod 20 is raised, the stoppers 30a and 32a of the first pusher 30 and the second pusher 32 are raised. Are respectively inserted into the grooves 22 and 24 of the pressure rod 20, and are positioned as shown in FIG. 4 so that the second pusher 32 can be removed from the inside of the first bushing 10. As shown in FIG.

According to the present invention described above, by using the press-fit jig having an extended pusher to be able to insert and fix the upper and lower bushes at the same time in one step to reduce the number of manufacturing processes and optimize the straightness to shorten the assembly time of the product In addition to quality improvements, production costs can be reduced.

Claims (2)

A pressurizing rod having a plurality of grooves, A first pusher installed on the upper outer circumferential surface of the pressure rod and pressurizing the first bush while the lower end thereof expands when inserted into the pivot housing; A bush assembly of the wiper pivot housing, characterized in that the second pusher is disposed below the first pusher via the first bushing and presses the second bush while the lower end thereof expands when inserted into the pivot housing. The method of claim 1, Bushing device of the wiper pivot housing, characterized in that the stopper is protruded in each of the first pusher and the first pusher.