KR20170042926A - A ball-joint with sealing structure - Google Patents

A ball-joint with sealing structure Download PDF

Info

Publication number
KR20170042926A
KR20170042926A KR1020150142146A KR20150142146A KR20170042926A KR 20170042926 A KR20170042926 A KR 20170042926A KR 1020150142146 A KR1020150142146 A KR 1020150142146A KR 20150142146 A KR20150142146 A KR 20150142146A KR 20170042926 A KR20170042926 A KR 20170042926A
Authority
KR
South Korea
Prior art keywords
case
opening
bearing
ball
dust cover
Prior art date
Application number
KR1020150142146A
Other languages
Korean (ko)
Inventor
박준성
Original Assignee
현대위아 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대위아 주식회사 filed Critical 현대위아 주식회사
Priority to KR1020150142146A priority Critical patent/KR20170042926A/en
Publication of KR20170042926A publication Critical patent/KR20170042926A/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/005—Ball joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0666—Sealing means between the socket and the inner member shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/416—Ball or spherical joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/418—Bearings, e.g. ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Sealing Devices (AREA)

Abstract

The present invention provides a ball joint with a sealing structure, including: a ball stud having a spherical head portion; a hollow case having a first opening for accommodating the head portion and a second opening at a position facing the first opening; a bearing interposed between the head part and the case; a case cover disposed at the second opening of the case and fixing the ball stud and the bearing inside the case; a dust cover including a first engaging portion for engaging with the ball stud and a second engaging portion for engaging with the case; and an O-ring inserted between the case, the bearing, and the case cover. As such, the present invention is able to prevent insertion of foreign substances entering from outside, and improve performance of safety by forming a structure of being able to discharge the foreign substances previously inserted, and also to prevent damage to a lubricant inside a case, thus lengthening the lifespan of a ball joint thereof.

Description

[0001] The present invention relates to a ball joint having a sealing structure,

The present invention relates to a ball joint for a vehicle, and more particularly to a ball joint for a vehicle having a sealing structure.

In general, a ball joint is a mechanical element that rotatably connects a part and a part in a three-dimensional relative rotatable manner. Such a ball joint is a part of the upper end of the upper arm or the lower arm, And the tip of the knuckle to smooth the relative motion between the components during running of the vehicle.

FIG. 1 is a sectional view for explaining an internal structure of a conventional ball joint, and FIG. 2 is a sectional view of components for explaining a dust cover of the ball joint of FIG. The structure of a conventional ball joint will be described with reference to this.

The conventional ball joint 1 comprises a ball stud 10, a bearing 30, a case 20 and a dust cover 60. The ball stud 10 is composed of a ball-shaped head 11 and a stud 12 for engaging with the knuckle arm. The head 11 of the ball stud is mounted in the bearing 30. A case 20 for coupling with a lower arm or an upper arm is coupled to the outer side of the bearing 30, and the lower end of the case is pressed by caulking.

The dust cover 60 is installed to prevent foreign matter from entering between the ball stud 10 and the case 20 and has a hollow shape with open ends at both ends, , And the other end is installed in the case 20. 2, grooves 61 and 62 are formed on a portion of the dust cover 60 that is coupled to the stud portion and a portion of the inner surface of the portion of the dust cover 60 that is coupled to the case, and a non-helical structure .

However, as described above, there is a possibility that the inflow of external foreign matter may not be completely blocked and only a small amount of foreign matter may be introduced by simply sealing the lower end of the case through the caulking operation or engaging the dust cover.

In addition, there is a structural limitation that there is no solution for the foreign matter that has once been introduced even though the foreign matter can be prevented from being introduced from the outside.

Accordingly, the lubricating oil inside the ball stud and the case is damaged by the foreign matter introduced into the joint, resulting in a significant reduction in the service life of the product, wear, noise, and safety performance.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a structure capable of preventing foreign matter from entering from outside, The present invention relates to a ball joint.

According to an aspect of the present invention for achieving the above object, there is provided a ball stud having a ball stud having a spherical head portion, a hollow portion having a first opening portion for accommodating the head portion therein and a second opening portion at a position facing the first opening portion. A case cover disposed in the second opening of the case for fixing the ball stud and the bearing to the inside of the case; There is provided a ball joint having a sealing structure including a dust cover including a first coupling portion and a second coupling portion for coupling with the case, and an O-ring inserted between the case and the bearing and the case cover.

The second opening may include a caulking portion, and the caulking portion may support the bottom surface of the case cover.

In addition, an O-ring insertion groove may be formed in the bearing and / or the case so that the O-ring can be inserted into the bearing.

Further, the inner surface of the second engagement portion of the dust cover coupled with the case is formed as a spiral groove.

The dust cover may further include a fixing ring disposed along an outer circumferential direction of the second engaging portion of the dust cover and fixing the second engaging portion to the case.

In the ball joint having the sealing structure according to the present invention as described above, since the O-ring is inserted between the case, the bearing and the case cover, moisture, foreign matter and the like are introduced into the gap between the case and the case cover It can be prevented.

Particularly, there is an effect that the caulking portion of the second opening is caulked inward so as to support the bottom surface of the case cover, so that the O-ring is more firmly fixed to the O-ring insertion hole and the possibility that the ball stud is released also becomes low.

Further, since the O-ring insertion groove is formed in each of the bearings and the case or both of them, the O-ring is more firmly fixed and the possibility of disengagement is lowered.

In addition, since the inner surface of the second engagement portion of the dust cover coupled with the case is formed as a spiral groove, foreign matter such as moisture already introduced into the dust cover can be discharged to the outside along the spiral groove.

Further, by including the retaining ring in the outer circumferential direction of the second engagement portion of the dust cover, there is an effect that the second engagement portion can be tightly fixed to the case.

1 is a cross-sectional view for explaining an internal structure of a conventional ball joint.
Fig. 2 is a sectional view of the components for explaining the dust cover of the ball joint of Fig. 1;
3 is a cross-sectional view illustrating an internal structure of a ball joint according to a first embodiment of the present invention.
Fig. 4 is a cross-sectional view of the components for explaining the dust cover of the ball joint of Fig. 3;
5 is a cross-sectional view illustrating an internal structure of a ball joint according to a second embodiment of the present invention.

Hereinafter, a preferred embodiment of a ball joint having a sealing structure of the present invention will be described with reference to Figs. 3 to 5 attached hereto.

It is to be understood that both the foregoing description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention, and are not intended to limit the scope of the invention. But are merely illustrative of the elements recited in the claims.

FIG. 3 is a sectional view for explaining the internal structure of the ball joint according to the first embodiment of the present invention, and FIG. 4 is a sectional view of the components for explaining the dust cover of the ball joint of FIG. The ball joint according to the first embodiment of the present invention will be described with reference to this.

The ball stud 100 includes a spherical head portion 110 and a cylindrical stud portion 120 connected to the head portion. The ball stud 100 may be formed of a metal material. The stud part 120 is coupled with a knuckle arm (not shown) and can be press-fitted or bolted. When the stud part 120 and the knuckle arm are bolted to each other, a bolt for bolt connection may be formed on the stud part. The stud part is inserted through the fastener hole formed in the knuckle arm, Respectively.

A flange portion 122 is formed on the stud portion 120 so that the dust cover 600 can be fixedly coupled. The flange portion 122 is configured in a shape having a larger diameter than the diameter of the cylinder of the stud portion 120.

The case 200 accommodates the head portion 110 of the ball stud and is coupled to the lower arm or the upper arm (not shown). In the present embodiment, the lower arm will be described with reference to the lower arm. The case 200 may be integrally formed with the lower arm and may be press-fitted or bolted. When the case 200 is bolted to the lower arm, a bolt for bolt connection may be formed on the outer side of the case.

The case 200 has a hollow shape with upper and lower sides opened. The first opening 210 opened at one end is for inserting the ball stud, and the first opening 210, which is opposed to the first opening 210, 2 opening 220 is a place where the case cover 400 is inserted to fix the ball stud 100 and the bearing 300 inside the case 200. [

The first opening 210 is larger than the diameter of the stud part 120 of the ball stud and smaller than the maximum diameter of the head part 110 so that the head part 110 can be received in the case 200. [ Lt; / RTI > In addition, a case groove 230 is formed in the outer circumferential surface of the first opening 210 to allow the dust cover 600 to be engaged and fixed.

The second opening 220 is larger than the maximum diameter of the head portion 110 of the ball stud and has a diameter larger than a hollow diameter of the case 200. However, the second opening 220 may have a diameter equal to or smaller than the hollow diameter of the case 200. In addition, the second opening 220 includes a caulking portion 222 extending along the rim of the opening.

The bearing 300 is interposed between the head portion 110 of the ball stud and the case 200 and may be formed of a rubber material. The bearing 300 allows the ball stud 100 to smoothly move in the case 200.

The case cover 400 is inserted into the second opening 220 and the caulking portion 222 of the second opening is folded toward the bottom of the case cover 400, It is supported. The case cover 400 serves to fix the ball stud 100 disposed inside the case 200 and the bearing 300 in a tight contact manner with the inside of the case.

An O-ring (500) is inserted between the case (200), the bearing (300) and the case cover (400). In the present embodiment, an O-ring insertion hole 510a through which the O-ring 500 can be inserted is formed along the edge of the bottom surface of the bearing 300, and an O-ring is inserted into the O-ring insertion hole 510a. The O-ring 500 is brought into contact with both the bearing 300, the case 200 and the case cover 400, and the gap between the case cover 400 and the second opening 220 So that foreign substances such as moisture can be prevented from flowing into the case 200.

In addition, the o-ring 500 is closely fixed to the O-ring insertion hole 510a by the caulking operation, thereby reducing the possibility that the O-ring 500 is released during the flow of the ball stud 100.

The dust cover 600 is formed of a rubber material that can change its shape and has a hollow shape with both open sides and has a first engaging portion 610 for engaging with the flange portion 122 of the stud portion, And a second engaging portion 620 for engaging with the engaging portion 230. The dust cover between the first engaging portion 610 and the second engaging portion 620 has a curved shape so as to be elongated and reduced due to the flow motion of the ball stud 100. Accordingly, the dust cover 600 functions to seal moisture, foreign matter, and the like into the case 200.

4, the inner circumferential surface of the first engaging portion 610 has a non-helical groove 612 parallel to the transverse axis, but the inner circumferential surface of the second engaging portion 620 has a helical shape A groove 622 is formed. Since the inner circumferential surface of the second engaging portion 620 is formed as a spiral groove 622 so that even foreign substances such as moisture that have already flowed into the dust cover 600 due to the swinging motion of the ball stud 100, And can be discharged to the outside again along the groove 622 of the helical structure. Especially, it is possible to discharge naturally by the force of gravity.

The stationary ring 700 is disposed in the outer circumferential direction of the second engaging portion 620 and serves to closely fix the second engaging portion 620 of the dust cover to the case 200.

5 is a cross-sectional view illustrating an internal structure of a ball joint according to a second embodiment of the present invention. The ball joint according to the second embodiment of the present invention will be described with reference to this.

The ball joint according to the second embodiment differs only in the position where the ball joint and the O-ring insertion hole are formed according to the first embodiment, and the remaining components are the same. Therefore, only the different parts are described and the rest are omitted.

The O-ring 500 is inserted between the case 200, the bearing 300 and the case cover 400. In the second embodiment, an O-ring insertion hole 510b is formed at an edge of a bottom surface of the bearing 300 and an edge of the case 200 opposite to the O-ring insertion hole 510b, An O-ring is inserted into the hole 510b. The O-ring 500 is brought into contact with both the bearing 300, the case 200 and the case cover 400, and the gap between the case cover 400 and the second opening 220 So that foreign matter such as moisture can be prevented from flowing into the case.

Also, the o-ring 500 is closely fixed to the o-ring insertion hole 510b by the caulking operation, thereby reducing the possibility of separation of the ball stud 100 during the movement of the ball stud 100.

Next, the operation process of the ball joint of the present invention will be described.

The ball stud 100 swings in the case 200 by the relative movement of the knuckle arm (not shown) and the lower arm (not shown) connected to the ball joint 2. At this time, since the dust cover 600 is made of a flexible material, one side of the dust cover 100 is reduced and increased as the ball stud 100 moves.

When the ball stud 100 swings, the dust cover 600 is pulled in a direction in which the ball stud is moved, so that clearance between the dust cover and the case on the extending side may occur. As a result, moisture and foreign matter may flow into the case 200 or the bearing 300, causing bearing wear and noise.

Conventionally, when moisture, foreign matter, or the like has flowed into the dust cover 600 as described above, there is no method for discharging the dust cover 600 again, and therefore it has been forced to stay inside. However, since the inner surface of the second engagement portion 620 of the dust cover has the spiral groove 622, the dust cover can be discharged to the outside again along the spiral groove.

Even if the case cover 400 is inserted into the second opening 220 of the case to perform a caulking operation, a gap is formed between the case 200 and the case cover 400, There was a possibility of influx. However, by inserting the O-ring 500 between the case 200, the bearing 300 and the case cover 400, the gap between the case and the case cover is sealed, It is possible to prevent foreign matter from entering.

2: Ball joint 100: Ball stud
110: head part 120: stud part
122: flange portion 200: case
210: first opening 220: second opening
222: caulking portion 230: case groove
300: Bearing 400: Case cover
500: O-ring 510: O-ring insertion hole
600: dust cover 610: first engaging portion
620: second coupling portion 700: fixed ring

Claims (5)

A ball stud having a spherical head;
A hollow case having a first opening for accommodating the head portion therein and a second opening at a position opposite to the first opening;
A bearing interposed between the head part and the case;
A case cover which is disposed at a second opening of the case and fixes the ball stud and the bearing inside the case;
A dust cover including a first engaging portion for engaging with the ball stud and a second engaging portion for engaging with the case;
An O-ring inserted between the case and the bearing and the case cover;
The ball joint having a sealing structure. The method according to claim 1,
Wherein the second opening portion includes a caulking portion, and the caulking portion supports the bottom surface of the case cover. 3. The method of claim 2,
Wherein an O-ring insertion groove is formed in each of the bearing and the case so that the O-ring can be inserted into the bearing. The method of claim 3,
And the inner surface of the second engagement portion of the dust cover coupled with the case is formed as a spiral groove. 5. The method of claim 4,
A retaining ring disposed along an outer circumferential direction of the second engaging portion of the dust cover and fixing the second engaging portion to the case;
Wherein the ball joint has a sealing structure.
KR1020150142146A 2015-10-12 2015-10-12 A ball-joint with sealing structure KR20170042926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150142146A KR20170042926A (en) 2015-10-12 2015-10-12 A ball-joint with sealing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150142146A KR20170042926A (en) 2015-10-12 2015-10-12 A ball-joint with sealing structure

Publications (1)

Publication Number Publication Date
KR20170042926A true KR20170042926A (en) 2017-04-20

Family

ID=58705834

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150142146A KR20170042926A (en) 2015-10-12 2015-10-12 A ball-joint with sealing structure

Country Status (1)

Country Link
KR (1) KR20170042926A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240021366A (en) * 2022-08-09 2024-02-19 서진산업 주식회사 Fixing structure of Ball joint having screw combining type and Fixing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240021366A (en) * 2022-08-09 2024-02-19 서진산업 주식회사 Fixing structure of Ball joint having screw combining type and Fixing method thereof

Similar Documents

Publication Publication Date Title
CA2967434C (en) Ball joint assembly
JP6607920B2 (en) Dust boots for movable joints
US6773196B2 (en) Ball joint
EP3464915B1 (en) Socket assembly and method of making a socket assembly
EP3469221B1 (en) Socket assembly and method of making a socket assembly
US9765811B2 (en) Ball socket assembly
CN109072968B (en) Shroud for a socket assembly
US20170268564A1 (en) Socket Assembly And Method Of Making A Socket Assembly
JP6376426B2 (en) Ball joint
CN111133208A (en) Sliding bearing
KR20170042926A (en) A ball-joint with sealing structure
KR940000442B1 (en) Self-adjusting pivot joint with axial play for motors
US20050051974A1 (en) Ball socket ring seal
CN111868396B (en) Improved socket assembly and method of making same
EP3686447A1 (en) Ball joint and dust cover
KR20180054342A (en) Ball joint
JP2020125816A (en) Ball joint
CN109139686A (en) Low noise is anti-to invade type cleaner pivoting support
JP2019124291A (en) Slide bearing
KR20180054311A (en) Cross axis ball joint
KR20090029878A (en) Ball joint having the same shape of the axis of a ball stud as the lip portion of a dust cover