KR20020040323A - Pillow ball bush for vehicle - Google Patents

Abstract

PURPOSE: A pillow ball bush of a vehicle is provided to prevent foreign material from letting in a gap between a stud member and a dust cover member and to reduce actuating noise. CONSTITUTION: A pillow ball bush for a vehicle comprises a through hole(11a) penetrating both sides of a pillow ball bush(10) by being mounted on a stud unit(11); a circular protrusion unit(11b) formed on the stud member; a bearing member(12) surrounding an outer circumference of the circular protrusion unit; a dust cover member(13) connecting the bearing member and the stud member by covering end portions of the stud member; a grease(14) filled with the gap between the bearing member and the dust cover member; an inner case member(15) surrounding an outer circumference of the bearing member; a seat member(16) inserted to the gap between the dust cover member and the inner case member; an impact absorbing member(17) covering an outer circumference of the inner case member; and an outer pipe member(18) protecting an outer circumference of the impact absorbing member.

Description

Pillow Ball Bush for Automotive {PILLOW BALL BUSH FOR VEHICLE}

The present invention relates to a pillow ball bush for automobiles, and more particularly, to a pillow ball bush for automobiles to prevent overall foreign matter from entering between the stud member and the dust cover member to improve the overall durability while reducing operating noise.

In general, a pillow ball bush is a joint provided at the end or one side of arms and links that constitute a suspension system or steering system and interconnects a sub frame of a vehicle. As shown in FIG. 1, the pillow ball bush 10 has a stud member 11 having a through hole 11a penetrating both sides thereof, and an outer circumferential surface of the circular protrusion 11b provided in the stud member 11. A bearing member 12 installed to surround the dust cover, a dust cover member 13 configured to wrap and protect both ends of the stud member 11 while connecting the bearing member 12 and the stud member 11, and the The grease 14 of the magneto-rheological (MR) fluid component filled in the gap between the stud member 11 and the bearing member 12 and the dust cover member 13, and the outer peripheral surface of the bearing member 12 The inner case member 15 is installed so as to protect the wrapped, the dust A sheet member 16 fitted into a gap between the cover member 13 and the inner case member 15, and an impact absorbing member 17 made of rubber material to surround and protect the outer circumferential surface of the inner case member 15; The outer pipe member 18 is formed to surround and protect the outer circumferential surface of the shock absorbing member 17.

Here, the magneto-rheological (MR) fluid is a fluid whose viscosity (yield stress) changes according to the change of the magnetic field, and is a fluid having a property that the viscosity increases as the strength of the magnetic field increases.

Accordingly, the arm and the link member are inserted into the through hole 11a of the stud member 11 to be coupled to each other. The stud member 11 is shown in FIG. 1 according to the characteristics of the arm and the link member. It has a spring characteristic that is rotated in the circumferential direction of the axis as shown by arrow Q1 and a spring characteristic that flows in the up and down direction of the axis as shown by arrow Q2.

However, according to the conventional pillow ball bush 10 as described above, the foreign matter is introduced into the small gap (13a) formed in the portion where the stud member 11 and the dust cover member 13 in contact with each other, the pillow Not only is the noise generated when the ball bush is operated seriously, but as a result, the overall durability is reduced, and there is a problem in that it is easily broken and causes consumer dissatisfaction.

Accordingly, the present invention has been made to solve the above problems, by blocking the inflow of foreign substances from the outside by interposing an oil seal (site) in the place where the stud member and the dust cover member contact each other, It is an object of the present invention to provide a pillow ball bush for automobiles that can significantly reduce operating noise during operation of the pillow ball bush, as well as improve overall service life.

The present invention for achieving the above object, a pair of dust cover member for preventing the leakage of grease filled between the stud member and the bearing member is coupled so that one end is connected to the outer peripheral surface of both ends of the stud member and the other end is In the pillow ball bush for automobiles coupled to be connected to the bearing member, the stud member and the dust cover member is in contact with each other, characterized in that the oil chamber for blocking the inflow of foreign matter from the outside is installed.

1 is a schematic partial longitudinal cross-sectional view illustrating a conventional pillow ball bush generally used;

Figure 2 is a schematic partial longitudinal cross-sectional view illustrating a pillow ball bush with an oil seal according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10-pillow ball bush 11-stud member

11a-through hole 11b-circular projection

12-bearing member 12a-groove

13-dust cover member 14-grease

15-inner case member 16-sheet member

17-shock absorbing member 18-outer pipe member

19-oil seal

DETAILED DESCRIPTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic partial longitudinal sectional view for explaining a pillow ball bush with an oil seal according to the present invention, will be described with the same reference numerals to the same parts as the conventional structure.

As shown in FIG. 2, the pillow ball bush 10 according to the present invention includes a stud member 11 having a through hole 11a penetrating both sides, and a circular protrusion part provided in the stud member 11. The bearing member 12 installed to surround the outer circumferential surface of 11b), and the dust cover member 13, which is formed to surround and protect both ends of the stud member 11 while connecting the bearing member 12 and the stud member 11 to each other. ), Grease (M) of magneto-rheological (MR) fluid component filled with a gap between the stud member 11 and the bearing member 12 and the dust cover member 13, and the bearing member 12. An inner case member 15 installed to surround and protect the outer circumferential surface of the cover member), a sheet member 16 fitted into a gap between the dust cover member 13 and the inner case member 15, and the inner case member ( A shock absorbing member (17) made of rubber material to surround and protect the outer circumferential surface of It consists of an outer pipe member 18 so as to surround the outer circumferential surface of the protection member 17.

In this case, the stud member 11 and the dust cover member 14 are in contact with each other to prevent foreign substances from flowing in from the outside to significantly reduce the operating noise during the operation of the pillow ball bush 10 while reducing the overall durability Oil chambers 19 for promotion are respectively provided.

On the other hand, the MR (Magneto-rheological) fluid is a fluid whose viscosity (yield stress) changes in accordance with the change of the magnetic field, the fluid having a property that the viscosity increases as the strength of the magnetic field increases.

Therefore, when the pair of oil chambers 19 are interposed between the stud member 11 and the dust cover member 14 according to the present invention, the stud member 11 and the dust cover member are installed. Since foreign matters are prevented from being completely introduced into the gap between the fourteen parts, the pillow ball bush 10 flows in the circumferential direction of the shaft by the spring characteristics Q1 and Q2 or in the vertical direction of the shaft. When not only the operation noise is significantly reduced, but also the overall durability of the pillow ball bush 10 is improved.

As described above, according to the present invention, a pair of oil chambers are respectively provided between the stud member and the dust cover member, and the foreign material is completely blocked from flowing into the gap between the stud member and the dust cover member. Not only is the operation noise of the ball bush significantly reduced, and as a result, the overall durability of the pillow ball bush is improved, thereby improving the commercial property.

Claims (1)

A pair of dust cover members 13 for preventing leakage of grease 14 filled between the stud member 11 and the bearing member 12 are coupled so that one end is connected to both outer peripheral surfaces of the stud member 11. In the pillow ball bush for automobile coupled to the bearing member 14, The pillow ball bush for automobiles, characterized in that the oil chamber (19) for blocking the foreign matter from being introduced from the outside is installed in the area where the stud member (11) and the dust cover member (14) contact each other.