WO2022149948A1 - Ball joint and method of manufacturing same - Google Patents

Ball joint and method of manufacturing same Download PDF

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Publication number
WO2022149948A1
WO2022149948A1 PCT/KR2022/000446 KR2022000446W WO2022149948A1 WO 2022149948 A1 WO2022149948 A1 WO 2022149948A1 KR 2022000446 W KR2022000446 W KR 2022000446W WO 2022149948 A1 WO2022149948 A1 WO 2022149948A1
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WO
WIPO (PCT)
Prior art keywords
bearing
housing
ball joint
ball
preparation step
Prior art date
Application number
PCT/KR2022/000446
Other languages
French (fr)
Korean (ko)
Inventor
황보성신
김현우
황효상
박인희
박성국
박민국
권순찬
남승현
강무창
김세환
Original Assignee
주식회사 일진
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 주식회사 일진 filed Critical 주식회사 일진
Publication of WO2022149948A1 publication Critical patent/WO2022149948A1/en

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    • 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
    • F16C11/0685—Manufacture of ball-joints and parts thereof, e.g. assembly of 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
    • 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
    • F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
    • F16C11/0623—Construction or details of the socket member
    • F16C11/0657—Construction or details of the socket member the socket member being mainly made of plastics
    • 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
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding

Definitions

  • the present invention relates to a ball joint that can be mounted and used in a vehicle suspension device, and a method for manufacturing the same, and more particularly, to a cup-type ball joint having an improved structure to improve injection moldability of an insert molding part, and It relates to a manufacturing method thereof.
  • a ball joint is a spherical bearing device that realizes relative motion between parts by inserting a spherical ball member into the housing and combining them.
  • the ball joint is configured such that the ball member provided at one end of the ball stud is inserted and coupled into the receiving space provided in the housing, and a bearing (ball seat) is mounted on the outer circumferential surface of the ball member to ensure smooth rotation of the ball member. It is configured to assist, and an insert molding part is injected between the bearing and the housing to fix the bearing to the housing.
  • the insert molding part may be formed by injection molding by injecting an insert resin into the space between the bearing and the housing in a state where the housing is placed in the mold, and then the ball member with the bearing is inserted into the receiving space of the housing. .
  • An object of the present invention is to solve the above problems, and to provide a cup-type ball joint having an improved structure to improve injection moldability of an insert molding part, and a method for manufacturing the same.
  • a representative configuration of the present invention for achieving the above object is as follows.
  • a ball joint that can be used in a vehicle suspension or steering system.
  • a ball joint according to an embodiment of the present invention includes a ball stud having a ball member and a rod member formed to extend to one side from the ball member; a housing having an accommodating space in which the ball member is accommodated; a bearing coupled to the outer circumferential surface of the ball member; It may include an insert molding for fixing the bearing to the housing.
  • the housing and the bearing may be formed in a cup-shaped structure with an open upper part and a closed lower part, and the insert molding unit lowers the insert resin from the upper part of the bearing toward the space between the housing and the bearing. It may be configured to be injection-molded by injection into
  • one or more partition walls protruding outward in the radial direction may be provided on the upper portion of the bearing, and the partition walls may be formed to extend in the vertical direction.
  • a plurality of partition walls may be provided while being spaced apart along the circumferential direction.
  • the upper end of the partition wall may be formed to protrude upward compared to the upper end of the bearing.
  • a support portion formed to protrude in a radial direction may be provided on an inner circumferential surface of the housing, and a radially outer surface of the partition wall may be configured to be supported in contact with a radially inner surface of the support portion.
  • the support portion of the housing may be configured to contact the radially outer surface of the bulkhead at a position above the upper end of the bearing.
  • the lower end of the bearing may be configured to contact the lower end of the housing.
  • the bearing has a protrusion formed to protrude downwardly on the outer surface of the lower end
  • the housing has a receiving groove formed by being depressed downwardly on the inner surface of the lower end, and the protrusion is inserted into the receiving groove It may be configured to contact the receiving groove.
  • a method of manufacturing a ball joint that can be used in a vehicle suspension or steering system.
  • a method of manufacturing a ball joint according to an embodiment of the present invention prepares a ball stud having a ball member and a rod member, a housing having an accommodating space in which the ball member is accommodated, and a bearing coupled to the outer circumferential surface of the ball member parts preparation step; an injection molding preparation step of arranging the housing in a mold, and inserting and positioning the ball member to which the bearing is coupled into the receiving space of the housing; It may include an injection molding step of injecting an insert resin into the space between the housing and the bearing to form an insert molding part.
  • the housing and the bearing prepared in the component preparation step may be formed in a cup-shaped structure with an open upper portion and a closed lower portion.
  • the insert resin in the injection molding step, may be injected downwardly from the upper portion of the bearing toward the space between the housing and the bearing, and may be configured to injection mold the insert molding part.
  • one or more bulkheads protruding radially outward and extending in the vertical direction may be provided on the upper portion of the bearing prepared in the component preparation step.
  • a plurality of partition walls may be provided in the upper part of the bearing prepared in the component preparation step spaced apart in the circumferential direction, and in the injection molding step, the insert resin is injected through the space between the adjacent partition walls. It can be configured to be
  • the bearing prepared in the component preparation step may be formed such that the upper end of the bulkhead protrudes upward compared to the upper end of the bearing.
  • the inner circumferential surface of the housing prepared in the component preparation step may be provided with a support portion protruding radially inwardly, and in the injection molding preparation step, the radially outer surface of the partition wall is within the radial direction of the support portion. It may be configured to be supported in contact with the side surface.
  • the support portion of the housing may be configured to contact the radially outer surface of the partition wall at an upper position relative to the upper end portion of the bearing.
  • the lower end of the bearing may be configured to contact the lower end of the housing in the injection molding preparation step.
  • the bearing prepared in the component preparation step is provided with a protrusion formed to protrude downward from the outer surface of the lower end, and the housing prepared in the component preparation step is depressed downwardly on the inner surface of the lower end.
  • a receiving groove may be provided, and in the injection molding preparation step, the protrusion may be inserted into the receiving groove and configured to contact the receiving groove.
  • the ball joint and the manufacturing method thereof according to the present invention may further include other additional configurations within the scope of not impairing the technical spirit of the present invention.
  • the ball joint according to an embodiment of the present invention is formed to protrude outward in the radial direction from the upper part of the bearing (ball seat) and has a partition wall extending in the vertical direction. As the flow is guided and filled in the axial direction by the flow, the final filling can be made at the upper end located on the opposite side of the injection unit.
  • the insert molding part can be stably formed in the entire space between the housing and the bearing while being easily discharged to the outside through the upper gap (eg, the upper gap positioned on the opposite side of the injection part).
  • the ball joint according to an embodiment of the present invention is configured so that the lower end of the bearing is coupled to the lower end of the housing in contact with the lower end of the housing. can be stably guided, and thereby the injection moldability of the above-described insert molding part can be further improved.
  • the ball joint according to an embodiment of the present invention is configured such that the outer surface of the partition is supported in contact with the inner surface of the support portion by providing a support portion protruding radially inwardly from the inner circumferential surface of the housing and/or the lower end of the bearing is configured to contact and couple to the lower end of the housing, so that when the insert resin is injected into the space between the housing and the bearing for injection molding, the bearing is unintentionally rotated by the injection pressure to prevent incomplete molding from occurring. do.
  • FIG. 1 exemplarily shows the overall structure of a ball joint according to an embodiment of the present invention.
  • FIG. 2 exemplarily shows an exploded perspective view of a ball joint according to an embodiment of the present invention.
  • FIG. 3 exemplarily shows a cross-sectional structure of a ball joint according to an embodiment of the present invention.
  • FIG. 4 exemplarily shows a bearing (ball seat) that can be used in a ball joint according to an embodiment of the present invention.
  • FIG. 5 exemplarily shows a view from the top of a bearing that can be used in a ball joint according to an embodiment of the present invention.
  • FIG. 6 exemplarily shows another embodiment of a bearing in which the present invention may be used in a ball joint according to an embodiment.
  • FIG. 7 exemplarily shows a state in which a ball member coupled with a bearing is inserted into the housing in order to inject the insert resin in the ball joint according to an embodiment of the present invention.
  • FIG. 8 exemplarily illustrates a state in which an insert resin is filled in the outer surface of the bearing in the process of injection molding the insert molding part in the ball joint according to an embodiment of the present invention.
  • FIG. 9 exemplarily shows a process flow diagram of a method for manufacturing a ball joint according to an embodiment of the present invention.
  • axial direction refers to a direction along the central axis of the ball studs, bearings, and housings constituting the ball joint
  • circumferential direction refers to a circumferential direction that rotates with respect to the central axis.
  • direction indicators such as “upper” and “upper” mean the direction in which the rod member is positioned with respect to the ball member of the ball stud in the structure shown in the drawings, and direction indicators such as “lower” and “downward” are the means in the opposite direction.
  • a direction indicator such as “inside” means a direction toward the central axis
  • a direction indicator such as “outside” means a direction opposite thereto.
  • a component when referred to as being “located” or “formed” on one side of another component, it means that a component is positioned or formed in direct contact with one side of the other component, Or it should be understood that it may be positioned or formed with other new components interposed therebetween.
  • the overall structure of the ball joint 100 according to an embodiment of the present invention is illustrated by way of example.
  • the ball joint 100 according to an embodiment of the present invention may be formed in a structure similar to a general ball joint as a whole, and is provided in a vehicle suspension device or a steering device, etc. and interconnected parts It can perform the function of implementing various relative motions between them.
  • the ball joint 100 includes a ball stud 200 including a spherical ball member; a housing 300 into which the ball member of the ball stud is inserted and accommodated; a bearing 400 coupled to the ball member 210 of the ball stud 200; It is provided between the housing 300 and the bearing 400 and may include an insert molding unit 500 for fixing the bearing 400 to the housing 300 .
  • the ball stud 200 may be configured to include a spherical ball member 210 and a rod member 220 formed to extend along one direction from the ball member 210, , the ball member 210 is inserted into the housing 300 to perform a function of relatively moving the parts coupled to the rod member 220 in various directions with respect to the housing 300 .
  • the housing 300 is a part forming the body of the ball joint 100 , and has an accommodating space 310 therein so that the ball member 210 of the ball stud 200 is inserted. and may be configured to be accommodated.
  • the housing 300 may be configured such that an opening is provided at the upper end so that the rod member 220 of the ball stud 200 extends to the outside of the housing 300 through the opening,
  • the lower end of the 300 may be formed in a closed structure. That is, according to an embodiment of the present invention, the housing 300 may be formed in a cup-shaped structure in which the upper part is open and the lower part is closed.
  • a support portion 320 formed to protrude inward in a radial direction is provided on the inner circumferential surface of the housing 300, and the support portion 320 is in contact with the partition wall 430 of the bearing 400 to be described later. It may be configured to support the bearing 400 .
  • the support part 320 may be continuously formed to extend along the entire circumferential direction of the housing 300 , or partially extend along the circumferential direction of the housing 300 to provide the housing 300 . It may be configured to be provided with one or more on the inner peripheral surface of the.
  • the bearing 400 surrounds the outer circumferential surface of the ball member 210 to assist the spherical rotation of the ball member 210, as shown in FIGS. 4 and 5 .
  • a plurality of members eg, the upper bearing 400a and the lower bearing 400b may be formed by being coupled or may be formed as one integral single member as shown in FIG. 6 .
  • the bearing 400 may be formed of a synthetic resin material having excellent wear resistance and high modulus of elasticity, and the inner circumferential surface of the bearing 400 has a raceway portion in contact with the outer circumferential surface of the ball member 210 . It may be configured to be provided.
  • the bearing 400 has an accommodating space 410 therein, and the ball member 210 of the ball stud 200 is inserted into the accommodating space 410 to be coupled thereto. .
  • an opening is provided at the upper end of the bearing 400 so that the rod member 220 of the ball stud 200 may be configured to extend to the outside of the bearing 400 through the opening 420 .
  • the lower end of the bearing 400 may be formed in a closed structure. That is, according to an embodiment of the present invention, the bearing 400 may be formed in a cup-shaped structure in which the upper part is open and the lower part is closed.
  • one or more recesses 420 are provided on the inner circumferential surface of the bearing 400 to assist the relative rotation between the ball member 210 and the bearing 400 in the recess 420 . It may be configured to be filled with grease.
  • the recess 420 provided on the inner circumferential surface of the bearing 400 may be formed to be recessed from the inner circumferential surface, and may be configured to extend in one or more directions.
  • first recesses 422 extending along the axial direction and second recesses 424 extending along the circumferential direction are provided on the inner circumferential surface of the bearing 400 . Consists of.
  • the upper portion of the bearing 400 may be configured to include one or more partition walls 430 formed to protrude outward in the radial direction.
  • the partition wall 430 may be configured to extend in the vertical direction along the axial direction, and may be configured to be provided in plurality at a predetermined interval along the circumferential direction.
  • the radially outer surface 440 of the partition wall 430 is supported in contact with the radially inner surface 330 of the support portion 320 , and the injection molding portion 500 to be described later is injected. It may be configured to prevent rotation of the bearing 400 by injection pressure during molding.
  • the radially outer surface 440 of the partition wall 430 and the radially inner surface 330 of the support 320 are configured to include a plane extending vertically along the axial direction, They may be configured to contact each other through axially extending planes.
  • the radially inner portion of the partition wall 430 may be configured to have an inclined surface 450 formed to be farther from the central axis toward the upper portion as shown in FIG. 4 .
  • the circumferential side surface 460 of the partition wall 430 may be configured to include a plane extending along the axial direction.
  • both sides 460 in the circumferential direction of the partition wall 430 may be configured to be formed as a plane extending along the axial direction as a whole.
  • the ball joint 100 is configured to include a partition wall 430 protruding from the outer circumferential surface to the upper portion of the bearing 400 and extending vertically, the housing 300 and the bearing
  • the insert resin is injected into the space between 400 and the insert molding part 500 is formed, the flow of the insert resin is induced in the axial direction by the partition wall 430 and finished at the upper end of the bearing 400 located on the opposite side It may be configured to be filled (End Filling), whereby the injection gas is stably discharged to the outside through the upper end of the bearing, and the injection moldability of the insert molding unit 500 can be improved.
  • the partition wall 430 is the upper end [480;
  • the upper end 480 of the bearing 400 may be configured to protrude upward compared to the upper end of the portion where the partition wall 430 is not formed.
  • the support portion 320 of the above-described housing 300 is in contact with the radially outer surface 440 of the partition wall 430 at a position higher than the upper end 480 of the bearing 400 . can be configured.
  • the plurality of partition walls 430 provided to be spaced apart along the circumferential direction in the upper portion of the bearing 400 may be all formed in the same shape as shown in FIGS. 4 and 5 , , may be formed to have a plurality of different shapes as shown in FIG. 6 .
  • the bearing 400 may be configured to be inserted into and coupled to the receiving space 310 of the housing 300 while the lower end thereof is in contact with the lower end of the housing 300 .
  • the lower end of the bearing 400 is provided with a protrusion 490 formed to protrude downward, and the protrusion 490 is inserted into the receiving groove 340 formed at the lower end of the housing 300 . It may be configured to contact the receiving groove 340 .
  • the bearing 400 when the lower end of the bearing 400 is configured to be mounted in contact with the lower end of the housing 300 , the bearing 400 is placed in the housing 300 by the contact of the lower end during injection molding of the insert molding unit 500 .
  • rotation of the bearing 400 can be prevented during insert injection molding, and the flow of the insert resin is guided during injection molding, so that the injection moldability of the insert molding part can be further improved.
  • the insert molding part 500 may be formed between the housing 300 and the bearing 400 to perform a function of fixing the bearing 400 to the housing 300 .
  • the insert molding unit 500 may be configured to be formed by injection molding by injecting the molten insert resin into the space between the housing 300 and the bearing 400 .
  • the insert molding part 500 is between the housing 300 and the bearing 400 in the upper part of one side (the part indicated by A in FIG. 7 ) of the bearing 400 as shown in FIG. 7 . It may be configured to be formed by injecting the insert resin downward into the gap of the .
  • the ball joint 100 is provided with a partition wall 430 extending in the vertical direction on the upper portion of the bearing 400, and the circumferential side surface of the partition wall 430 ( Since the 460 is formed in a planar structure extending along the axial direction, the insert resin injected when the insert resin is injected downward from the upper portion of the bearing 400 toward the space between the housing 300 and the bearing 400 . As the flow is guided in the axial direction by the bulkhead 430 , it is possible to stably fill the space between the housing 300 and the bearing 400 .
  • the insert resin injected downward toward the space between the housing 300 and the bearing 400 is guided by the partition wall 430 to fill the space between the housing 300 and the bearing 400 and then injected. It can be configured so that the finish filling takes place in the upper part opposite to the part (indicated by B in FIG. 7 ).
  • the insert molding part 500 when the insert molding part 500 is injection molded, the injection gas can be easily discharged to the outside through the upper end located on the opposite side of the injection part (refer to the part indicated by B in FIG. 7 ), which results in an unmolded part or an incomplete part
  • the insert molding part 500 can be stably formed between the housing 300 and the bearing 400 without the formation of the molding part. [Refer to the filling process of the insert molding part 500 shown in FIG. 8]
  • the insert molding part 500 may be configured to be stably coupled to the bearing 400 by filling the space between the partition walls 430 , and the support part 320 formed in the housing 300 . It is formed to cover the upper end of the housing 300 and may be configured to be coupled stably.
  • the dust cover 600 is mounted around the opening provided at the upper end of the housing 300 and the bearing 400 , and the dust cover 600 is installed through the opening of the housing 300 and the bearing 400 . It may be configured to prevent foreign substances from being introduced.
  • one end of the dust cover 600 is coupled to a mounting groove 230 provided in the rod member 200 of the ball stud 200 and the other end is a mounting groove provided in the housing 300 , etc. may be configured to couple to 350 .
  • FIG. 9 a flowchart of a process for manufacturing a ball joint according to an embodiment of the present invention is exemplarily arranged.
  • the method of manufacturing a ball joint includes a ball stud 200 having a ball member 210 and a rod member 220, and a ball member 210 therein.
  • a finishing process (S400) such as separating the ball joint from the mold, performing finishing processing as necessary, and mounting a dust cover may be performed.
  • the parts eg, ball stud 200, housing 300, bearing 400, etc.
  • the parts preparation step (S100) are in one embodiment of the present invention described above. It may be formed substantially the same as the ball joint 100 according to the embodiment.
  • the housing 300 and the bearing 400 prepared in the component preparation step (S100) may be formed in a cup-shaped structure with an open upper portion and a closed lower portion, and the housing
  • the inner circumferential surface of the 300 may be provided with a support portion 320 formed to protrude inward in the radial direction
  • the upper portion of the bearing 400 may include one or more partition walls 430 formed to protrude outward in the radial direction and extend in the vertical direction. It may be configured to be provided (preferably, a plurality of spaced apart in the circumferential direction), and the upper end 470 of the partition wall 430 may be formed to protrude upward compared to the upper end 480 of the bearing 400 . .
  • the bearing 400 in the injection molding preparation step (S200), is coupled to the outer peripheral surface of the ball member 210, and the radially outer surface 440 of the partition wall 430 is supported by the support part 320 . It may be configured to be inserted into the receiving space 310 of the housing 300 so as to be in contact with the radial inner surface 330 of the .
  • the support portion 320 of the housing 300 is in contact with the radially outer surface 440 of the partition wall 430 at a position higher than the upper end 480 of the bearing 400 . can be configured to
  • the bearing 400 in the forming preparation step (S200), has a lower end in contact with the lower end of the housing, for example, a protrusion ( 490 may be inserted into the receiving groove 340 provided at the lower end of the housing 300 to be in contact with the receiving groove 340 .
  • the insert resin in the injection molding step (S300), may be configured to be injected downwardly from the upper portion of the bearing 400 toward the space between the housing 300 and the bearing 400, and the insert The resin may be configured to be injected through the space between the adjacent partition walls 430 .
  • the insert resin in the injection molding step ( S300 ), is also filled in the space between the partition walls 430 to form the insert molding part 500 , and the housing 300 is It may also be injected into the upper end of the support part 320 to form the insert molding part 500 .

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

Abstract

According to one embodiment of the present invention, provided is a ball joint which may be used in a suspension system, a steering system of a vehicle, and the like. The ball joint according to one embodiment of the present invention may comprise: a ball stud provided with a ball member and a rod member extending in one side from the ball member; a housing having an accommodating space within which the ball member is accommodated; a bearing coupled to an outer circumferential surface of the ball member; and an insert molding part fixing the bearing to the housing. According to one embodiment of the present invention, the housing and the bearing may be formed in a cup-shaped structure with an open top and a closed bottom, and the insert molding part may be formed through injection molding by injecting an insert resin down toward a space between the housing and the bearing from the top of the bearing.

Description

볼조인트 및 이의 제조방법Ball joint and manufacturing method thereof
본 발명은 차량의 현가장치 등에 장착되어 이용될 수 있는 볼조인트 및 이의 제조방법에 관한 것으로, 보다 상세하게는 인서트 몰딩부의 사출 성형성을 향상시킬 수 있도록 개선된 구조를 갖는 컵 타입의 볼조인트 및 이의 제조방법에 관한 것이다.The present invention relates to a ball joint that can be mounted and used in a vehicle suspension device, and a method for manufacturing the same, and more particularly, to a cup-type ball joint having an improved structure to improve injection moldability of an insert molding part, and It relates to a manufacturing method thereof.
볼조인트는 구형의 볼부재를 하우징에 삽입하여 결합함으로써 부품들 사이의 상대운동을 구현하는 구형의 베어링 장치로, 차량의 현가장치나 조향장치 등에 장착되어 부품들 사이의 상대운동을 구현하는데 이용될 수 있다.A ball joint is a spherical bearing device that realizes relative motion between parts by inserting a spherical ball member into the housing and combining them. can
구체적으로, 볼조인트는 볼스터드의 일단에 구비된 볼부재가 하우징에 구비된 수용공간 내에 삽입되어 결합되도록 구성되며, 볼부재의 외주면에는 베어링(볼 시트)이 장착되어 볼부재의 원활한 회전 운동을 보조하도록 구성되고, 베어링과 하우징 사이에는 인서트 몰딩부가 사출되어 베어링을 하우징에 고정시키도록 구성될 수 있다.Specifically, the ball joint is configured such that the ball member provided at one end of the ball stud is inserted and coupled into the receiving space provided in the housing, and a bearing (ball seat) is mounted on the outer circumferential surface of the ball member to ensure smooth rotation of the ball member. It is configured to assist, and an insert molding part is injected between the bearing and the housing to fix the bearing to the housing.
한편, 인서트 몰딩부는 하우징을 금형에 배치시킨 다음 베어링이 장착된 볼부재를 하우징의 수용공간 내로 삽입하여 배치한 상태에서 베어링과 하우징 사이의 공간으로 인서트 수지 주입해 사출 성형하는 방식으로 형성될 수 있다.On the other hand, the insert molding part may be formed by injection molding by injecting an insert resin into the space between the bearing and the housing in a state where the housing is placed in the mold, and then the ball member with the bearing is inserted into the receiving space of the housing. .
그런데, 이와 같이 베어링과 하우징 사이의 공간에 인서트 몰딩부를 사출 성형해 베어링을 하우징에 고정시키도록 구성된 볼조인트의 경우에는, 인서트 수지를 주입할 때 베어링에 의도치 않은 회전이 발생하여 성형성이 저하되거나, 사출 성형시 발생되는 사출 가스가 외부로 원활히 배출되지 못하고 내부에 잔존하게 되면서 해당 부분에서 불완전 성형이 발생되는 등의 문제가 나타날 수 있다.However, in the case of a ball joint configured to fix the bearing to the housing by injection molding the insert molding in the space between the bearing and the housing, unintentional rotation occurs in the bearing when the insert resin is injected, resulting in lower moldability Alternatively, as the injection gas generated during injection molding is not smoothly discharged to the outside and remains inside, problems such as incomplete molding may occur in the corresponding part.
본 발명은 전술한 문제점을 해소하기 위한 것으로, 인서트 몰딩부의 사출 성형성을 향상시킬 수 있도록 개선된 구조를 갖는 컵 타입의 볼조인트 및 이의 제조방법을 제공하는 것을 목적으로 한다.An object of the present invention is to solve the above problems, and to provide a cup-type ball joint having an improved structure to improve injection moldability of an insert molding part, and a method for manufacturing the same.
전술한 목적을 달성하기 위한 본 발명의 대표적인 구성은 다음과 같다.A representative configuration of the present invention for achieving the above object is as follows.
본 발명의 일 실시예에 따르면, 차량의 현가장치나 조향장치 등에 이용될 수 있는 볼조인트가 제공된다. 본 발명의 일 실시예에 따른 볼조인트는 볼부재와 볼부재로부터 일측으로 연장하여 형성된 로드부재를 구비하는 볼스터드와; 내부에 볼부재가 수용되는 수용공간을 갖는 하우징과; 볼부재의 외주면에 결합되는 베어링과; 베어링을 하우징에 고정시키는 인서트 몰딩부를 포함할 수 있다. 본 발명의 일 실시예에 따르면, 하우징 및 베어링은 상부가 개방되고 하부가 폐쇄된 컵 형상의 구조로 형성될 수 있고, 인서트 몰딩부는 베어링의 상부로부터 하우징과 베어링 사이의 공간을 향해 인서트 수지를 하방으로 주입하여 사출 성형되도록 구성될 수 있다.According to an embodiment of the present invention, there is provided a ball joint that can be used in a vehicle suspension or steering system. A ball joint according to an embodiment of the present invention includes a ball stud having a ball member and a rod member formed to extend to one side from the ball member; a housing having an accommodating space in which the ball member is accommodated; a bearing coupled to the outer circumferential surface of the ball member; It may include an insert molding for fixing the bearing to the housing. According to an embodiment of the present invention, the housing and the bearing may be formed in a cup-shaped structure with an open upper part and a closed lower part, and the insert molding unit lowers the insert resin from the upper part of the bearing toward the space between the housing and the bearing. It may be configured to be injection-molded by injection into
본 발명의 일 실시예에 따르면, 베어링의 상부 부분에는 반경방향 외측으로 돌출되어 형성된 격벽이 하나 이상 구비될 수 있고, 격벽은 상하방향으로 연장하여 형성될 수 있다.According to an embodiment of the present invention, one or more partition walls protruding outward in the radial direction may be provided on the upper portion of the bearing, and the partition walls may be formed to extend in the vertical direction.
본 발명의 일 실시예에 따르면, 격벽은 원주방향을 따라 이격되어 복수로 구비될 수 있다.According to an embodiment of the present invention, a plurality of partition walls may be provided while being spaced apart along the circumferential direction.
본 발명의 일 실시예에 따르면, 격벽의 상단부는 베어링의 상단부에 비해 상부로 돌출되도록 형성될 수 있다.According to an embodiment of the present invention, the upper end of the partition wall may be formed to protrude upward compared to the upper end of the bearing.
본 발명의 일 실시예에 따르면, 하우징의 내주면에는 반경방향 내측으로 돌출되어 형성된 지지부가 구비될 수 있고, 격벽의 반경방향 외측면은 지지부의 반경방향 내측면에 접촉하여 지지되도록 구성될 수 있다.According to an embodiment of the present invention, a support portion formed to protrude in a radial direction may be provided on an inner circumferential surface of the housing, and a radially outer surface of the partition wall may be configured to be supported in contact with a radially inner surface of the support portion.
본 발명의 일 실시예에 따르면, 하우징의 지지부는 베어링의 상단부에 비해 상부의 위치에서 격벽의 반경방향 외측면과 접촉하도록 구성될 수 있다.According to an embodiment of the present invention, the support portion of the housing may be configured to contact the radially outer surface of the bulkhead at a position above the upper end of the bearing.
본 발명의 일 실시예에 따르면, 베어링의 하단부는 하우징의 하단부에 접촉하도록 구성될 수 있다.According to an embodiment of the present invention, the lower end of the bearing may be configured to contact the lower end of the housing.
본 발명의 일 실시예에 따르면, 베어링은 하단부의 외측면에 하방으로 돌출되어 형성된 돌기부를 구비하고, 하우징은 하단부의 내측면에 하방으로 함몰되어 형성된 수용홈을 구비하고, 돌기부는 수용홈 내로 삽입되어 수용홈에 접촉하도록 구성될 수 있다.According to an embodiment of the present invention, the bearing has a protrusion formed to protrude downwardly on the outer surface of the lower end, and the housing has a receiving groove formed by being depressed downwardly on the inner surface of the lower end, and the protrusion is inserted into the receiving groove It may be configured to contact the receiving groove.
본 발명의 일 실시예에 따르면, 차량의 현가장치나 조향장치 등에 이용될 수 있는 볼조인트의 제조방법이 제공된다. 본 발명의 일 실시예에 따른 볼조인트의 제조방법은 볼부재 및 로드부재를 구비하는 볼스터드와, 내부에 볼부재가 수용되는 수용공간을 갖는 하우징과, 볼부재의 외주면에 결합되는 베어링을 준비하는 부품 준비 단계와; 하우징을 금형에 배치하고, 베어링이 결합된 볼부재를 하우징의 수용공간 내로 삽입하여 위치시키는 사출 성형 준비 단계와; 하우징과 베어링 사이의 공간으로 인서트 수지를 주입해 인서트 몰딩부를 형성하는 사출 성형 단계를 포함할 수 있다. 본 발명의 일 실시예에 따르면, 부품 준비 단계에서 준비되는 하우징 및 베어링은 상부가 개방되고 하부가 폐쇄된 컵 형상의 구조로 형성될 수 있다. 본 발명의 일 실시예에 따르면, 사출 성형 단계에서 인서트 수지는 베어링의 상부로부터 하우징과 베어링 사이의 공간을 향해 하방으로 주입되어 인서트 몰딩부를 사출 성형하도록 구성될 수 있다.According to an embodiment of the present invention, there is provided a method of manufacturing a ball joint that can be used in a vehicle suspension or steering system. A method of manufacturing a ball joint according to an embodiment of the present invention prepares a ball stud having a ball member and a rod member, a housing having an accommodating space in which the ball member is accommodated, and a bearing coupled to the outer circumferential surface of the ball member parts preparation step; an injection molding preparation step of arranging the housing in a mold, and inserting and positioning the ball member to which the bearing is coupled into the receiving space of the housing; It may include an injection molding step of injecting an insert resin into the space between the housing and the bearing to form an insert molding part. According to an embodiment of the present invention, the housing and the bearing prepared in the component preparation step may be formed in a cup-shaped structure with an open upper portion and a closed lower portion. According to an embodiment of the present invention, in the injection molding step, the insert resin may be injected downwardly from the upper portion of the bearing toward the space between the housing and the bearing, and may be configured to injection mold the insert molding part.
본 발명의 일 실시예에 따르면, 부품 준비 단계에서 준비되는 베어링의 상부 부분에는 반경방향 외측으로 돌출되며 상하방향으로 연장하여 형성된 격벽이 하나 이상 구비될 수 있다.According to an embodiment of the present invention, one or more bulkheads protruding radially outward and extending in the vertical direction may be provided on the upper portion of the bearing prepared in the component preparation step.
본 발명의 일 실시예에 따르면, 부품 준비 단계에서 준비되는 베어링의 상부 부분에는 격벽이 원주방향을 따라 이격되어 복수로 구비될 수 있고, 사출 성형 단계에서 인서트 수지는 인접한 격벽 사이의 공간을 통해 주입되도록 구성될 수 있다.According to an embodiment of the present invention, a plurality of partition walls may be provided in the upper part of the bearing prepared in the component preparation step spaced apart in the circumferential direction, and in the injection molding step, the insert resin is injected through the space between the adjacent partition walls. It can be configured to be
본 발명의 일 실시예에 따르면, 부품 준비 단계에서 준비되는 베어링은 격벽의 상단부가 베어링의 상단부에 비해 상부로 돌출되도록 형성될 수 있다.According to an embodiment of the present invention, the bearing prepared in the component preparation step may be formed such that the upper end of the bulkhead protrudes upward compared to the upper end of the bearing.
본 발명의 일 실시예에 따르면, 부품 준비 단계에서 준비되는 하우징의 내주면에는 반경방향 내측으로 돌출되어 형성된 지지부가 구비될 수 있고, 사출 성형 준비 단계에서 격벽의 반경방향 외측면은 지지부의 반경방향 내측면에 접촉하여 지지되도록 구성될 수 있다.According to an embodiment of the present invention, the inner circumferential surface of the housing prepared in the component preparation step may be provided with a support portion protruding radially inwardly, and in the injection molding preparation step, the radially outer surface of the partition wall is within the radial direction of the support portion. It may be configured to be supported in contact with the side surface.
본 발명의 일 실시예에 따르면, 사출 성형 준비 단계에서 하우징의 지지부는 베어링의 상단부에 비해 상부의 위치에서 격벽의 반경방향 외측면과 접촉하도록 구성될 수 있다.According to an embodiment of the present invention, in the injection molding preparation step, the support portion of the housing may be configured to contact the radially outer surface of the partition wall at an upper position relative to the upper end portion of the bearing.
본 발명의 일 실시예에 따르면, 사출 성형 준비 단계에서 베어링의 하단부는 하우징의 하단부에 접촉하도록 구성될 수 있다.According to an embodiment of the present invention, the lower end of the bearing may be configured to contact the lower end of the housing in the injection molding preparation step.
본 발명의 일 실시예에 따르면, 부품 준비 단계에서 준비되는 베어링은 하단부의 외측면에 하방으로 돌출되어 형성된 돌기부를 구비하고, 부품 준비 단계에서 준비되는 하우징은 하단부의 내측면에 하방으로 함몰되어 형성된 수용홈을 구비하고, 사출 성형 준비 단계에서 돌기부는 수용홈 내로 삽입되어 수용홈에 접촉되도록 구성될 수 있다.According to an embodiment of the present invention, the bearing prepared in the component preparation step is provided with a protrusion formed to protrude downward from the outer surface of the lower end, and the housing prepared in the component preparation step is depressed downwardly on the inner surface of the lower end. A receiving groove may be provided, and in the injection molding preparation step, the protrusion may be inserted into the receiving groove and configured to contact the receiving groove.
이 외에도, 본 발명에 따른 볼조인트 및 이의 제조방법에는 본 발명의 기술적 사상을 해치지 않는 범위에서 다른 부가적인 구성이 더 포함될 수 있다.In addition to this, the ball joint and the manufacturing method thereof according to the present invention may further include other additional configurations within the scope of not impairing the technical spirit of the present invention.
본 발명의 일 실시예에 따른 볼조인트는 베어링(볼 시트)의 상부 부분에 반경방향 외측으로 돌출되어 형성되며 상하방향으로 연장하는 격벽을 구비하고 있어, 하우징과 베어링 사이로 주입되는 인서트 수지가 격벽에 의해 축방향으로 유동이 안내되어 충진되면서 주입부의 반대측에 위치하는 상단부에서 마무리 충진이 이루어질 수 있게 되고, 이로 인해 컵 형상을 갖는 볼조인트에서 인서트 몰딩부를 사출 성형하는 경우에도 사출 가스가 하우징과 베어링 사이의 상부 간극(예컨대, 주입부의 반대측에 위치하는 상부측 간극)을 통해 외부로 용이하게 배출되면서 하우징과 베어링 사이의 전체 공간에 인서트 몰딩부가 안정적으로 형성될 수 있게 된다.The ball joint according to an embodiment of the present invention is formed to protrude outward in the radial direction from the upper part of the bearing (ball seat) and has a partition wall extending in the vertical direction. As the flow is guided and filled in the axial direction by the flow, the final filling can be made at the upper end located on the opposite side of the injection unit. The insert molding part can be stably formed in the entire space between the housing and the bearing while being easily discharged to the outside through the upper gap (eg, the upper gap positioned on the opposite side of the injection part).
또한, 본 발명의 일 실시예에 따른 볼조인트는 베어링의 하단부가 하우징의 하단부에 접촉하여 결합되도록 구성되어 있어, 하우징과 베어링 사이로 인서트 수지를 주입할 때 주입부의 반대측에서 인서트 수지의 유동이 상부 방향으로 안정적으로 안내될 수 있고, 이로 인해 전술한 인서트 몰딩부의 사출 성형성이 더욱 향상될 수 있게 된다.In addition, the ball joint according to an embodiment of the present invention is configured so that the lower end of the bearing is coupled to the lower end of the housing in contact with the lower end of the housing. can be stably guided, and thereby the injection moldability of the above-described insert molding part can be further improved.
또한, 본 발명의 일 실시예에 따른 볼조인트는 하우징의 내주면에 반경방향 내측으로 돌출되어 형성된 지지부를 구비해 격벽의 외측면이 지지부의 내측면에 접촉되어 지지되도록 구성되고 및/또는 베어링의 하단부가 하우징의 하단부에 접촉하여 결합되도록 구성되어 있어, 하우징과 베어링 사이의 공간으로 인서트 수지를 주입해 사출 성형할 때 사출 압력에 의해 베어링이 의도치 않게 회전되어 불완전 성형이 발생하는 것을 방지할 수 있게 된다.In addition, the ball joint according to an embodiment of the present invention is configured such that the outer surface of the partition is supported in contact with the inner surface of the support portion by providing a support portion protruding radially inwardly from the inner circumferential surface of the housing and/or the lower end of the bearing is configured to contact and couple to the lower end of the housing, so that when the insert resin is injected into the space between the housing and the bearing for injection molding, the bearing is unintentionally rotated by the injection pressure to prevent incomplete molding from occurring. do.
도 1은 본 발명의 일 실시예에 따른 볼조인트의 전체적인 구조를 예시적으로 도시한다.1 exemplarily shows the overall structure of a ball joint according to an embodiment of the present invention.
도 2는 본 발명의 일 실시예에 따른 볼조인트의 분해 사시도를 예시적으로 도시한다.2 exemplarily shows an exploded perspective view of a ball joint according to an embodiment of the present invention.
도 3은 본 발명의 일 실시예에 따른 볼조인트의 단면 구조를 예시적으로 도시한다.3 exemplarily shows a cross-sectional structure of a ball joint according to an embodiment of the present invention.
도 4는 본 발명의 일 실시예에 따른 볼조인트에 이용될 수 있는 베어링(볼 시트)을 예시적으로 도시한다.4 exemplarily shows a bearing (ball seat) that can be used in a ball joint according to an embodiment of the present invention.
도 5는 본 발명의 일 실시예에 따른 볼조인트에 이용될 수 있는 베어링을 상부에서 본 모습을 예시적으로 도시한다.5 exemplarily shows a view from the top of a bearing that can be used in a ball joint according to an embodiment of the present invention.
도 6은 본 발명이 일 실시예에 따른 볼 조인트에 이용될 수 있는 베어링의 다른 실시형태를 예시적으로 도시한다.6 exemplarily shows another embodiment of a bearing in which the present invention may be used in a ball joint according to an embodiment.
도 7은 본 발명의 일 실시예에 따른 볼조인트에서 인서트 수지를 주입하기 위해 하우징 내에 베어링이 결합된 볼부재가 삽입된 모습을 예시적으로 도시한다.7 exemplarily shows a state in which a ball member coupled with a bearing is inserted into the housing in order to inject the insert resin in the ball joint according to an embodiment of the present invention.
도 8은 본 발명의 일 실시예에 따른 볼조인트에서 인서트 몰딩부를 사출 성형하는 과정에서 베어링의 외측면에 인서트 수지가 충진되는 모습을 예시적으로 도시한다.8 exemplarily illustrates a state in which an insert resin is filled in the outer surface of the bearing in the process of injection molding the insert molding part in the ball joint according to an embodiment of the present invention.
도 9는 본 발명의 일 실시예에 따른 볼조인트의 제조방법의 공정 흐름도를 예시적으로 도시한다.9 exemplarily shows a process flow diagram of a method for manufacturing a ball joint according to an embodiment of the present invention.
<부호의 설명><Explanation of code>
100: 볼조인트100: ball joint
200: 볼스터드200: bolstud
210: 볼부재210: ball member
220: 로드부재220: rod member
230: (로드부재에 형성된) 장착홈230: (formed on the rod member) mounting groove
300: 하우징300: housing
310: (하우징의) 수용공간310: accommodating space (of the housing)
320: 지지부320: support
330: (지지부의) 반경방향 내측면330: radially inner surface (of the support part)
340: 수용홈340: receiving home
350: (하우징에 형성된) 장착홈350: (formed in the housing) mounting groove
400: 베어링400: bearing
410: (베어링의) 수용공간410: (bearing) receiving space
420: 리세스420: recess
430: 격벽430: bulkhead
440: (격벽의) 반경방향 외측면440: radially outer surface (of the bulkhead)
450: (격벽의 반경방향 내측부에 구비된) 경사면450: inclined surface (provided on the radially inner side of the partition wall)
460: (격벽의) 원주방향 측면460: (of bulkhead) circumferential side
470: (격벽의) 상단부470: (of the bulkhead) upper part
480: (베어링에서 격벽이 형성되어 있지 않은 부분의) 상단부480: Upper end (of the bearing where no bulkhead is formed)
490: 돌기부490: protrusion
500: 인서트 몰딩500: insert molding
600: 더스트 커버600: dust cover
이하에서 기술되는 실시예들은 본 발명의 기술적 사상을 설명하기 위한 목적으로 예시된 것으로, 본 발명의 권리범위가 이하에 제시되는 실시예들이나 이에 대한 구체적 설명으로 제한되는 것은 아니다.The embodiments described below are exemplified for the purpose of explaining the technical spirit of the present invention, and the scope of the present invention is not limited to the embodiments presented below or specific descriptions thereof.
본 명세서에서 사용되는 모든 기술적 용어들 및 과학적 용어들은 달리 정의되지 않는 한 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 일반적으로 이해되는 의미를 가지며, 본 명세서에서 사용되는 모든 용어들은 본 발명을 더욱 명확히 설명하기 위한 목적으로 선택된 것으로서 본 발명의 권리범위를 제한하기 위해 선택된 것이 아니다.All technical and scientific terms used herein have the meanings commonly understood by those of ordinary skill in the art to which the present invention belongs, unless otherwise defined, and all terms used herein It was selected for the purpose of more clearly explaining the present invention and not to limit the scope of the present invention.
본 명세서에서 사용되는 "포함하는", "구비하는", "갖는" 등과 같은 표현은 해당 표현이 포함되는 어구 또는 문장에서 달리 언급되지 않는 한 다른 실시예를 포함할 가능성을 내포하는 개방형 용어(open-ended terms)로 이해되어야 한다.As used herein, expressions such as "comprising", "including", "having", etc. are open terms connoting the possibility of including other embodiments unless otherwise stated in the phrase or sentence in which the expression is included. -ended terms).
본 명세서에서 "축방향"은 볼조인트를 구성하는 볼스터드, 베어링, 하우징 등의 중심축을 따르는 방향을 의미하며, 원주방향은 이러한 중심축을 기준으로 회전하는 둘레방향을 의미한다. 한편, "상부", "상방" 등의 방향 지시어는 도면에 도시된 구조에서 볼스터드의 볼부재에 대해 로드부재가 위치하는 방향을 의미하고, "하부", "하방" 등의 방향 지시어는 이의 반대방향을 의미한다. 또한, "내측" 등의 방향 지시어는 중심축을 향하는 방향을 의미하고 "외측" 등의 방향 지시어는 이의 반대방향을 의미한다.As used herein, the term “axial direction” refers to a direction along the central axis of the ball studs, bearings, and housings constituting the ball joint, and the circumferential direction refers to a circumferential direction that rotates with respect to the central axis. On the other hand, direction indicators such as "upper" and "upper" mean the direction in which the rod member is positioned with respect to the ball member of the ball stud in the structure shown in the drawings, and direction indicators such as "lower" and "downward" are the means in the opposite direction. In addition, a direction indicator such as “inside” means a direction toward the central axis, and a direction indicator such as “outside” means a direction opposite thereto.
본 명세서에 기재된 단수형의 표현은 달리 언급하지 않는 한 복수형의 의미를 포함할 수 있으며, 이는 청구범위에 기재된 단수형의 표현에도 마찬가지로 적용된다.Expressions in the singular in this specification may include the meaning of the plural unless otherwise stated, and the same applies to expressions in the singular in the claims.
본 명세서에서 어떤 구성요소가 다른 구성요소의 일측에 "위치되어" 있다거나 "형성되어" 있다고 언급되는 경우, 이는 어떤 구성요소가 다른 구성요소의 일측에 직접 접촉된 상태로 위치되거나 형성되는 것으로, 또는 새로운 다른 구성요소를 중간에 개재한 상태로 위치하거나 형성될 수 있는 것으로 이해되어야 한다.In the present specification, when a component is referred to as being “located” or “formed” on one side of another component, it means that a component is positioned or formed in direct contact with one side of the other component, Or it should be understood that it may be positioned or formed with other new components interposed therebetween.
이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 대해 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있을 정도로 상세하게 설명한다. 첨부된 도면에서, 동일하거나 대응하는 구성요소는 동일한 참조부호를 통해 지시되어 있으며, 이하의 실시예들의 설명에 있어서 동일하거나 대응하는 구성요소는 중복하여 기술하는 것이 생략될 수 있다. 다만, 아래의 설명에서 특정 구성요소에 관한 기술이 생략되어 있더라도, 이는 그러한 구성요소가 해당 실시예에 포함되지 않는 것으로 의도되지는 않는다.Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail enough to be easily implemented by a person skilled in the art to which the present invention pertains. In the accompanying drawings, the same or corresponding components are indicated by the same reference numerals, and in the description of the following embodiments, the same or corresponding components may be omitted from overlapping description. However, even if descriptions regarding specific components are omitted from the following description, it is not intended that such components are not included in the corresponding embodiments.
도 1 내지 도 3을 참조하면, 본 발명의 일 실시예에 따른 볼조인트(100)의 전체적인 구조가 예시적으로 도시되어 있다. 도면에 도시된 바와 같이, 본 발명의 일 실시예에 따른 볼조인트(100)는 통상의 볼조인트와 전체적으로 유사한 구조로 형성될 수 있으며, 차량의 현가장치나 조향장치 등에 구비되어 상호 연결되는 부품들 사이에서 다양한 상대운동을 구현하는 기능을 수행할 수 있다.1 to 3, the overall structure of the ball joint 100 according to an embodiment of the present invention is illustrated by way of example. As shown in the drawing, the ball joint 100 according to an embodiment of the present invention may be formed in a structure similar to a general ball joint as a whole, and is provided in a vehicle suspension device or a steering device, etc. and interconnected parts It can perform the function of implementing various relative motions between them.
본 발명의 일 실시예에 따르면, 볼조인트(100)는 구형의 볼부재를 포함하는 볼스터드(200)와; 볼스터드의 볼부재가 삽입되어 수용되는 하우징(300)과; 볼스터드(200)의 볼부재(210)에 결합되는 베어링(400)과; 하우징(300)과 베어링(400) 사이에 구비되어 베어링(400)을 하우징(300)에 고정시키는 인서트 몰딩부(500) 등을 포함하여 구성될 수 있다.According to an embodiment of the present invention, the ball joint 100 includes a ball stud 200 including a spherical ball member; a housing 300 into which the ball member of the ball stud is inserted and accommodated; a bearing 400 coupled to the ball member 210 of the ball stud 200; It is provided between the housing 300 and the bearing 400 and may include an insert molding unit 500 for fixing the bearing 400 to the housing 300 .
본 발명의 일 실시예에 따르면, 볼스터드(200)는 구 형상의 볼부재(210)와 볼부재(210)로부터 일측방향을 따라 연장하여 형성되는 로드부재(220)를 포함하여 구성될 수 있으며, 볼부재(210)가 하우징(300) 내에 삽입되어 로드부재(220)에 결합된 부품을 하우징(300)에 대해 다양한 방향으로 상대이동 시키는 기능을 수행할 수 있다.According to an embodiment of the present invention, the ball stud 200 may be configured to include a spherical ball member 210 and a rod member 220 formed to extend along one direction from the ball member 210, , the ball member 210 is inserted into the housing 300 to perform a function of relatively moving the parts coupled to the rod member 220 in various directions with respect to the housing 300 .
본 발명의 일 실시예에 따르면, 하우징(300)은 볼조인트(100)의 몸체를 형성하는 부분으로, 내부에 수용공간(310)을 구비해 볼스터드(200)의 볼부재(210)가 삽입되어 수용되도록 구성될 수 있다.According to an embodiment of the present invention, the housing 300 is a part forming the body of the ball joint 100 , and has an accommodating space 310 therein so that the ball member 210 of the ball stud 200 is inserted. and may be configured to be accommodated.
본 발명의 일 실시예에 따르면, 하우징(300)은 상단부에 개구부가 구비되어 볼스터드(200)의 로드부재(220)가 개구부를 통해 하우징(300)의 외측으로 연장되도록 구성될 수 있으며, 하우징(300)의 하단부는 폐쇄된 구조로 형성될 수 있다. 즉, 본 발명의 일 실시예에 따르면, 하우징(300)은 상부가 개방되고 하부가 폐쇄된 컵 형상의 구조로 형성될 수 있다.According to an embodiment of the present invention, the housing 300 may be configured such that an opening is provided at the upper end so that the rod member 220 of the ball stud 200 extends to the outside of the housing 300 through the opening, The lower end of the 300 may be formed in a closed structure. That is, according to an embodiment of the present invention, the housing 300 may be formed in a cup-shaped structure in which the upper part is open and the lower part is closed.
본 발명의 일 실시예에 따르면, 하우징(300)의 내주면에는 반경방향 내측으로 돌출되어 형성된 지지부(320)가 구비되어, 지지부(320)가 후술하는 베어링(400)의 격벽(430)과 접촉해 베어링(400)을 지지하도록 구성될 수 있다.According to an embodiment of the present invention, a support portion 320 formed to protrude inward in a radial direction is provided on the inner circumferential surface of the housing 300, and the support portion 320 is in contact with the partition wall 430 of the bearing 400 to be described later. It may be configured to support the bearing 400 .
본 발명의 일 실시예에 따르면, 지지부(320)는 하우징(300)의 전체 원주방향을 따라 연장되어 연속적으로 형성될 수도 있고, 하우징(300)의 원주방향을 따라 부분적으로 연장되어 하우징(300)의 내주면에 하나 이상 구비되도록 구성될 수도 있다.According to an embodiment of the present invention, the support part 320 may be continuously formed to extend along the entire circumferential direction of the housing 300 , or partially extend along the circumferential direction of the housing 300 to provide the housing 300 . It may be configured to be provided with one or more on the inner peripheral surface of the.
본 발명의 일 실시예에 따르면, 베어링(400; 볼 시트)은 볼부재(210)의 외주면을 감싸서 볼부재(210)의 구면 회전을 보조하는 부분으로, 도 4 및 도 5에 도시된 바와 같이 복수의 부재[예컨대, 상부 베어링(400a) 및 하부 베어링(400b)]가 결합되어 형성될 수도 있고 도 6에 도시된 바와 같이 하나의 일체형 단일 부재로 형성될 수도 있다.According to an embodiment of the present invention, the bearing 400 (ball seat) surrounds the outer circumferential surface of the ball member 210 to assist the spherical rotation of the ball member 210, as shown in FIGS. 4 and 5 . A plurality of members (eg, the upper bearing 400a and the lower bearing 400b) may be formed by being coupled or may be formed as one integral single member as shown in FIG. 6 .
본 발명의 일 실시예에 따르면, 베어링(400)은 내마모성이 우수하고 탄성률이 높은 합성 수지재 등으로 형성될 수 있으며, 베어링(400)의 내주면에는 볼부재(210)의 외주면이 접촉하는 궤도부가 구비되도록 구성될 수 있다.According to an embodiment of the present invention, the bearing 400 may be formed of a synthetic resin material having excellent wear resistance and high modulus of elasticity, and the inner circumferential surface of the bearing 400 has a raceway portion in contact with the outer circumferential surface of the ball member 210 . It may be configured to be provided.
본 발명의 일 실시예에 따르면, 베어링(400)은 내부에 수용공간(410)을 구비해 수용공간(410) 내에 볼스터드(200)의 볼부재(210)가 삽입되어 결합되도록 구성될 수 있다.According to an embodiment of the present invention, the bearing 400 has an accommodating space 410 therein, and the ball member 210 of the ball stud 200 is inserted into the accommodating space 410 to be coupled thereto. .
본 발명의 일 실시예에 따르면, 베어링(400)의 상단부에는 개구부가 구비되어 볼스터드(200)의 로드부재(220)가 개구부(420)를 통해 베어링(400)의 외부로 연장되도록 구성될 수 있으며, 베어링(400)의 하단부는 폐쇄된 구조로 형성될 수 있다. 즉, 본 발명의 일 실시예에 따르면, 베어링(400)은 상부가 개방되고 하부가 폐쇄된 컵 형상의 구조로 형성될 수 있다.According to an embodiment of the present invention, an opening is provided at the upper end of the bearing 400 so that the rod member 220 of the ball stud 200 may be configured to extend to the outside of the bearing 400 through the opening 420 . And, the lower end of the bearing 400 may be formed in a closed structure. That is, according to an embodiment of the present invention, the bearing 400 may be formed in a cup-shaped structure in which the upper part is open and the lower part is closed.
본 발명의 일 실시예에 따르면, 베어링(400)의 내주면에는 하나 이상의 리세스(420)가 구비되어, 리세스(420) 내에 볼부재(210)와 베어링(400) 사이의 상대회전을 보조하는 그리스가 충진되도록 구성될 수 있다.According to an embodiment of the present invention, one or more recesses 420 are provided on the inner circumferential surface of the bearing 400 to assist the relative rotation between the ball member 210 and the bearing 400 in the recess 420 . It may be configured to be filled with grease.
본 발명의 일 실시예에 따르면, 베어링(400)의 내주면에 구비되는 리세스(420)는 내주면으로부터 함몰된 구조로 형성될 수 있으며, 하나 이상의 방향으로 연장되어 형성되도록 구성될 수 있다.According to an embodiment of the present invention, the recess 420 provided on the inner circumferential surface of the bearing 400 may be formed to be recessed from the inner circumferential surface, and may be configured to extend in one or more directions.
예컨대, 도면에 도시된 실시형태의 경우에는 베어링(400)의 내주면에 축방향을 따라 연장하는 제1 리세스(422)와 원주방향을 따라 연장하는 제2 리세스(424)가 하나 이상 구비되도록 구성되어 있다.For example, in the case of the embodiment shown in the drawings, one or more first recesses 422 extending along the axial direction and second recesses 424 extending along the circumferential direction are provided on the inner circumferential surface of the bearing 400 . Consists of.
본 발명의 일 실시예에 따르면, 베어링(400)의 상부 부분(예컨대, 베어링의 상부 반부 부분)에는 반경방향 외측으로 돌출되어 형성된 격벽(430)이 하나 이상 구비되도록 구성될 수 있다. 본 발명의 일 실시예에 따르면, 격벽(430)은 축방향을 따라 상하방향으로 연장되어 형성되도록 구성될 수 있으며, 원주방향을 따라 소정의 간격으로 이격되어 복수로 구비되도록 구성될 수 있다.According to an embodiment of the present invention, the upper portion of the bearing 400 (eg, the upper half portion of the bearing) may be configured to include one or more partition walls 430 formed to protrude outward in the radial direction. According to an embodiment of the present invention, the partition wall 430 may be configured to extend in the vertical direction along the axial direction, and may be configured to be provided in plurality at a predetermined interval along the circumferential direction.
본 발명의 일 실시예에 따르면, 격벽(430)의 반경방향 외측면(440)은 지지부(320)의 반경방향 내측면(330)에 접촉하여 지지되어, 후술하는 인서트 몰딩부(500)의 사출 성형시 사출 압력에 의해 베어링(400)의 회전되는 것을 방지하도록 구성될 수 있다.According to an embodiment of the present invention, the radially outer surface 440 of the partition wall 430 is supported in contact with the radially inner surface 330 of the support portion 320 , and the injection molding portion 500 to be described later is injected. It may be configured to prevent rotation of the bearing 400 by injection pressure during molding.
본 발명의 일 실시예에 따르면, 격벽(430)의 반경방향 외측면(440) 및 지지부(320)의 반경방향 내측면(330)은 축방향을 따라 상하로 연장하는 평면을 포함하도록 구성되어, 축방향으로 연장하는 평면을 통해 서로 접촉하도록 구성될 수 있다.According to an embodiment of the present invention, the radially outer surface 440 of the partition wall 430 and the radially inner surface 330 of the support 320 are configured to include a plane extending vertically along the axial direction, They may be configured to contact each other through axially extending planes.
본 발명의 일 실시예에 따르면, 격벽(430)의 반경방향 내측부는 도 4에 도시된 바와 같이 상부로 갈수록 중심축으로부터 멀어지도록 형성된 경사면(450)을 구비하도록 구성될 수 있다.According to an embodiment of the present invention, the radially inner portion of the partition wall 430 may be configured to have an inclined surface 450 formed to be farther from the central axis toward the upper portion as shown in FIG. 4 .
본 발명의 일 실시예에 따르면, 격벽(430)의 원주방향 측면(460)은 축방향을 따라 연장하는 평면을 포함하도록 구성될 수 있다. 예컨대, 격벽(430)의 원주방향 양측 측면(460)은 전체적으로 축방향을 따라 연장하는 평면으로 형성되도록 구성될 수 있다.According to an embodiment of the present invention, the circumferential side surface 460 of the partition wall 430 may be configured to include a plane extending along the axial direction. For example, both sides 460 in the circumferential direction of the partition wall 430 may be configured to be formed as a plane extending along the axial direction as a whole.
이와 같이, 본 발명의 일 실시예에 따른 볼조인트(100)는 베어링(400)의 상부 부분에 외주면으로부터 돌출되어 상하로 연장하는 격벽(430)을 구비도록 구성되어 있어, 하우징(300)과 베어링(400) 사이의 공간으로 인서트 수지를 주입해 인서트 몰딩부(500)를 형성할 때 격벽(430)에 의해 인서트 수지의 유동이 축방향으로 유도되면서 반대측에 위치하는 베어링(400)의 상단부에서 마무리 충진(End Filling)이 이루어지도록 구성될 수 있고, 이로 인해 사출 가스가 베어링의 상단부를 통해 안정적으로 외부로 배출되면서 인서트 몰딩부(500)의 사출 성형성이 향상될 수 있게 된다.As described above, the ball joint 100 according to an embodiment of the present invention is configured to include a partition wall 430 protruding from the outer circumferential surface to the upper portion of the bearing 400 and extending vertically, the housing 300 and the bearing When the insert resin is injected into the space between 400 and the insert molding part 500 is formed, the flow of the insert resin is induced in the axial direction by the partition wall 430 and finished at the upper end of the bearing 400 located on the opposite side It may be configured to be filled (End Filling), whereby the injection gas is stably discharged to the outside through the upper end of the bearing, and the injection moldability of the insert molding unit 500 can be improved.
본 발명의 일 실시예에 따르면, 격벽(430)은 베어링(400)의 상단부[480; 본 명세서에서 베어링(400)의 상단부(480)는 격벽(430)이 형성되어 있지 않은 부분의 상부 단부를 의미함]에 비해 상부로 돌출되어 형성되도록 구성될 수 있다.According to one embodiment of the present invention, the partition wall 430 is the upper end [480; In this specification, the upper end 480 of the bearing 400 may be configured to protrude upward compared to the upper end of the portion where the partition wall 430 is not formed.
본 발명의 일 실시예 따르면, 전술한 하우징(300)의 지지부(320)는 베어링(400)의 상단부(480)에 비해 상부의 위치에서 격벽(430)의 반경방향 외측면(440)에 접촉하도록 구성될 수 있다.According to one embodiment of the present invention, the support portion 320 of the above-described housing 300 is in contact with the radially outer surface 440 of the partition wall 430 at a position higher than the upper end 480 of the bearing 400 . can be configured.
본 발명의 일 실시예에 따르면, 베어링(400)의 상부 부분에 원주방향을 따라 이격되어 구비되는 복수의 격벽(430)은 도 4 및 도 5에 도시된 바와 같이 모두 동일한 형상으로 형성될 수도 있고, 도 6에 도시된 바와 같이 복수의 상이한 형상을 갖도록 형성될 수도 있다.According to an embodiment of the present invention, the plurality of partition walls 430 provided to be spaced apart along the circumferential direction in the upper portion of the bearing 400 may be all formed in the same shape as shown in FIGS. 4 and 5 , , may be formed to have a plurality of different shapes as shown in FIG. 6 .
본 발명의 일 실시예에 따르면, 베어링(400)은 하단부가 하우징(300)의 하단부에 접촉된 상태로 하우징(300)의 수용공간(310) 내에 삽입되어 결합되도록 구성될 수 있다.According to an embodiment of the present invention, the bearing 400 may be configured to be inserted into and coupled to the receiving space 310 of the housing 300 while the lower end thereof is in contact with the lower end of the housing 300 .
본 발명의 일 실시예에 따르면, 베어링(400)의 하단부에는 하방으로 돌출되어 형성된 돌기부(490)가 구비되어, 돌기부(490)가 하우징(300)의 하단부에 형성된 수용홈(340) 내로 삽입되어 수용홈(340)에 접촉하도록 구성될 수 있다.According to one embodiment of the present invention, the lower end of the bearing 400 is provided with a protrusion 490 formed to protrude downward, and the protrusion 490 is inserted into the receiving groove 340 formed at the lower end of the housing 300 . It may be configured to contact the receiving groove 340 .
이와 같이, 베어링(400)의 하단부가 하우징(300)의 하단부에 접촉되어 장착되도록 구성하게 되면, 인서트 몰딩부(500)의 사출 성형시 하단부의 접촉에 의해 베어링(400)이 하우징(300) 내에 안정적으로 지지되어 유지됨으로써 인서트 사출 성형시 베어링(400)이 회전되는 것을 방지할 수 있으며, 사출 성형시 인서트 수지의 유동이 안내되어 인서트 몰딩부의 사출 성형성이 더욱 향상될 수 있게 된다.As such, when the lower end of the bearing 400 is configured to be mounted in contact with the lower end of the housing 300 , the bearing 400 is placed in the housing 300 by the contact of the lower end during injection molding of the insert molding unit 500 . By being stably supported and maintained, rotation of the bearing 400 can be prevented during insert injection molding, and the flow of the insert resin is guided during injection molding, so that the injection moldability of the insert molding part can be further improved.
본 발명의 일 실시예에 따르면, 인서트 몰딩부(500)는 하우징(300)과 베어링(400) 사이에 형성되어 베어링(400)을 하우징(300)에 고정시키는 기능을 수행할 수 있다.According to an embodiment of the present invention, the insert molding part 500 may be formed between the housing 300 and the bearing 400 to perform a function of fixing the bearing 400 to the housing 300 .
본 발명의 일 실시예에 따르면, 인서트 몰딩부(500)는 용융된 상태의 인서트 수지를 하우징(300)과 베어링(400) 사이의 공간으로 주입해 사출 성형하여 형성되도록 구성될 수 있다.According to an embodiment of the present invention, the insert molding unit 500 may be configured to be formed by injection molding by injecting the molten insert resin into the space between the housing 300 and the bearing 400 .
본 발명의 일 실시예에 따르면, 인서트 몰딩부(500)는 도 7에 도시된 바와 같이 베어링(400)의 일측 상부(도 7에 A로 표시된 부분)에서 하우징(300)과 베어링(400) 사이의 간극 내로 인서트 수지를 하방으로 주입하여 형성되도록 구성될 수 있다.According to an embodiment of the present invention, the insert molding part 500 is between the housing 300 and the bearing 400 in the upper part of one side (the part indicated by A in FIG. 7 ) of the bearing 400 as shown in FIG. 7 . It may be configured to be formed by injecting the insert resin downward into the gap of the .
본 발명의 일 실시예에 따른 볼조인트(100)는 전술한 바와 같이 베어링(400)의 상부 부분에 상하방향으로 연장되어 형성된 격벽(430)이 구비되어 있으며, 격벽(430)의 원주방향 측면(460)이 축방향을 따라 연장하는 평면 구조로 형성되어 있기 때문에, 베어링(400)의 상부로부터 하우징(300)과 베어링(400) 사이의 공간을 향해 인서트 수지가 하방으로 주입될 때 주입된 인서트 수지가 격벽(430)에 의해 축방향으로 유동이 안내되면서 하우징(300)과 베어링(400) 사이의 공간을 안정적으로 채울 수 있게 된다.As described above, the ball joint 100 according to an embodiment of the present invention is provided with a partition wall 430 extending in the vertical direction on the upper portion of the bearing 400, and the circumferential side surface of the partition wall 430 ( Since the 460 is formed in a planar structure extending along the axial direction, the insert resin injected when the insert resin is injected downward from the upper portion of the bearing 400 toward the space between the housing 300 and the bearing 400 . As the flow is guided in the axial direction by the bulkhead 430 , it is possible to stably fill the space between the housing 300 and the bearing 400 .
예컨대, 하우징(300)과 베어링(400) 사이의 공간을 향해 하방으로 주입된 인서트 수지는 격벽(430)에 의해 유동이 안내되어 하우징(300)과 베어링(400) 사이의 공간을 모두 채운 다음 주입부의 반대측 상부(도 7에 B로 표시된 부분)에서 마무리 충진이 발생하도록 구성될 수 있게 된다.For example, the insert resin injected downward toward the space between the housing 300 and the bearing 400 is guided by the partition wall 430 to fill the space between the housing 300 and the bearing 400 and then injected. It can be configured so that the finish filling takes place in the upper part opposite to the part (indicated by B in FIG. 7 ).
따라서, 인서트 몰딩부(500)를 사출 성형할 때 사출 가스는 주입부의 반대측에 위치하는 상단부를 통해 외부로 용이하게 배출될 수 있고(도 7에 B로 표시된 부분 참조), 이로 인해 미성형부 또는 불완전 성형부의 발생 없이 하우징(300)과 베어링(400) 사이에 인서트 몰딩부(500)가 안정적으로 형성될 수 있게 된다. [도 8에 도시된 인서트 몰딩부(500)의 충진 과정 참조]Accordingly, when the insert molding part 500 is injection molded, the injection gas can be easily discharged to the outside through the upper end located on the opposite side of the injection part (refer to the part indicated by B in FIG. 7 ), which results in an unmolded part or an incomplete part The insert molding part 500 can be stably formed between the housing 300 and the bearing 400 without the formation of the molding part. [Refer to the filling process of the insert molding part 500 shown in FIG. 8]
본 발명의 일 실시예에 따르면, 인서트 몰딩부(500)는 격벽(430) 사이의 공간에도 충진되어 베어링(400)과 안정적으로 결합되도록 구성될 수 있으며, 하우징(300)에 형성된 지지부(320)의 상단부를 덮도록 형성되어 하우징(300)과도 안정적으로 결합되도록 구성될 수 있다.According to an embodiment of the present invention, the insert molding part 500 may be configured to be stably coupled to the bearing 400 by filling the space between the partition walls 430 , and the support part 320 formed in the housing 300 . It is formed to cover the upper end of the housing 300 and may be configured to be coupled stably.
본 발명의 일 실시예에 따르면, 하우징(300)과 베어링(400)의 상단부에 구비된 개구부 주위에는 더스트 커버(600)가 장착되어, 하우징(300)과 베어링(400)의 개구부를 통해 외부의 이물질이 유입되는 것을 방지하도록 구성될 수 있다.According to an embodiment of the present invention, the dust cover 600 is mounted around the opening provided at the upper end of the housing 300 and the bearing 400 , and the dust cover 600 is installed through the opening of the housing 300 and the bearing 400 . It may be configured to prevent foreign substances from being introduced.
본 발명의 일 실시예에 따르면, 더스트 커버(600)는 일단이 볼스터드(200)의 로드부재(200)에 구비된 장착홈(230)에 결합되고 타단이 하우징(300) 등에 구비된 장착홈(350)에 결합되도록 구성될 수 있다.According to an embodiment of the present invention, one end of the dust cover 600 is coupled to a mounting groove 230 provided in the rod member 200 of the ball stud 200 and the other end is a mounting groove provided in the housing 300 , etc. may be configured to couple to 350 .
한편, 도 9를 참조하면, 본 발명의 일 실시예에 따라 볼조인트를 제조하는 공정 흐름도가 예시적으로 정리되어 있다.Meanwhile, referring to FIG. 9 , a flowchart of a process for manufacturing a ball joint according to an embodiment of the present invention is exemplarily arranged.
이하에서 설명하는 본 발명의 일 실시예에 따른 볼조인트의 제조방법은 복수의 단계들이 순차적인 순서로 설명되어 있으나, 이러한 단계들은 반드시 이하에서 설명된 순서대로 수행되어야만 하는 것은 아니고, 일부 단계들의 순서가 변경되거나 일부의 단계들이 생략/추가되거나 일부의 단계들이 동시에 수행되도록 변형되어 실시될 수도 있다.In the method of manufacturing a ball joint according to an embodiment of the present invention to be described below, a plurality of steps are described in a sequential order, but these steps do not necessarily have to be performed in the order described below, and the order of some steps may be changed or modified such that some steps are omitted/added, or some steps are simultaneously performed.
도 9에 도시된 바와 같이, 본 발명의 일 실시예에 따른 볼조인트의 제조방법은 볼부재(210) 및 로드부재(220)를 구비하는 볼스터드(200)와, 내부에 볼부재(210)가 수용되는 수용공간(310)을 갖는 하우징(300)과, 볼부재(210)의 외주면에 결합되는 베어링(400) 등의 부품을 준비하는 부품 준비 단계(S100)와; 하우징(300)을 금형에 배치하고, 베어링(400)이 결합된 볼부재(210)를 하우징(300)의 수용공간(310) 내로 삽입하여 위치시키는 사출 성형 준비 단계(S200)와; 하우징(300)과 베어링(400) 사이의 공간으로 인서트 수지를 주입해 인서트 몰딩부(500)를 형성하는 사출 성형 단계(S300)를 포함하여 구성될 수 있으며, 인서트 몰딩부(500) 형성 이후에는 볼조인트를 금형으로부터 분리하고 필요에 따라 마무리 가공을 수행하고 더스트 커버를 장착하는 등의 마무리 공정(S400)이 수행될 수 있다.As shown in FIG. 9, the method of manufacturing a ball joint according to an embodiment of the present invention includes a ball stud 200 having a ball member 210 and a rod member 220, and a ball member 210 therein. A component preparation step (S100) of preparing components such as a housing 300 having an accommodation space 310 in which is accommodated, and a bearing 400 coupled to an outer circumferential surface of the ball member 210; An injection molding preparation step (S200) of placing the housing 300 in a mold and inserting the ball member 210 to which the bearing 400 is coupled into the receiving space 310 of the housing 300; It may be configured to include an injection molding step (S300) of injecting an insert resin into the space between the housing 300 and the bearing 400 to form the insert molding part 500, and after the insert molding part 500 is formed, A finishing process (S400) such as separating the ball joint from the mold, performing finishing processing as necessary, and mounting a dust cover may be performed.
본 발명의 일 실시예에 따르면, 부품 준비 단계(S100)에서 준비되는 부품들[예컨대, 볼스터드(200), 하우징(300), 베어링(400) 등]은 앞서 설명한 본 발명의 일 실시예에 따른 볼조인트(100)와 실질적으로 동일하게 형성될 수 있다.According to an embodiment of the present invention, the parts (eg, ball stud 200, housing 300, bearing 400, etc.) prepared in the parts preparation step (S100) are in one embodiment of the present invention described above. It may be formed substantially the same as the ball joint 100 according to the embodiment.
구체적으로, 본 발명의 일 실시예에 따르면, 부품 준비 단계(S100)에서 준비되는 하우징(300) 및 베어링(400)은 상부가 개방되고 하부가 폐쇄된 컵 형상의 구조로 형성될 수 있으며, 하우징(300)의 내주면에는 반경방향 내측으로 돌출되어 형성된 지지부(320)가 구비될 수 있고, 베어링(400)의 상부 부분에는 반경방향 외측으로 돌출되며 상하방향으로 연장되어 형성된 격벽(430)이 하나 이상(바람직하게는, 원주방향을 따라 이격되어 복수로) 구비되도록 구성될 수 있고, 격벽(430)의 상단부(470)는 베어링(400)의 상단부(480)에 비해 상부로 돌출되도록 형성될 수 있다.Specifically, according to an embodiment of the present invention, the housing 300 and the bearing 400 prepared in the component preparation step (S100) may be formed in a cup-shaped structure with an open upper portion and a closed lower portion, and the housing The inner circumferential surface of the 300 may be provided with a support portion 320 formed to protrude inward in the radial direction, and the upper portion of the bearing 400 may include one or more partition walls 430 formed to protrude outward in the radial direction and extend in the vertical direction. It may be configured to be provided (preferably, a plurality of spaced apart in the circumferential direction), and the upper end 470 of the partition wall 430 may be formed to protrude upward compared to the upper end 480 of the bearing 400 . .
본 발명의 일 실시예에 따르면, 사출 성형 준비 단계(S200)에서 베어링(400)은 볼부재(210)의 외주면에 결합되어, 격벽(430)의 반경방향 외측면(440)이 지지부(320)의 반경방향 내측면(330)과 접촉하도록 하우징(300)의 수용공간(310) 내로 삽입되어 장착되도록 구성될 수 있다. 예컨대, 본 발명의 일 실시예에 따르면, 하우징(300)의 지지부(320)는 베어링(400)의 상단부(480)에 비해 상부의 위치에서 격벽(430)의 반경방향 외측면(440)과 접촉하도록 구성될 수 있다.According to an embodiment of the present invention, in the injection molding preparation step (S200), the bearing 400 is coupled to the outer peripheral surface of the ball member 210, and the radially outer surface 440 of the partition wall 430 is supported by the support part 320 . It may be configured to be inserted into the receiving space 310 of the housing 300 so as to be in contact with the radial inner surface 330 of the . For example, according to an embodiment of the present invention, the support portion 320 of the housing 300 is in contact with the radially outer surface 440 of the partition wall 430 at a position higher than the upper end 480 of the bearing 400 . can be configured to
또한, 본 발명의 일 실시예에 따르면, 성형 준비 단계(S200)에서 베어링(400)은 하단부가 하우징의 하단부에 접촉되도록, 예컨대 도면에 도시된 바와 같이 베어링(400)의 하단부에 구비된 돌기부(490)가 하우징(300)의 하단부에 구비된 수용홈(340)에 삽입되어 수용홈(340)과 접촉하도록 구성될 수 있다.In addition, according to an embodiment of the present invention, in the forming preparation step (S200), the bearing 400 has a lower end in contact with the lower end of the housing, for example, a protrusion ( 490 may be inserted into the receiving groove 340 provided at the lower end of the housing 300 to be in contact with the receiving groove 340 .
본 발명의 일 실시예에 따르면, 사출 성형 단계(S300)에서는 인서트 수지가 베어링(400)의 상부로부터 하우징(300)과 베어링(400) 사이의 공간을 향해 하방으로 주입되도록 구성될 수 있으며, 인서트 수지는 인접한 격벽(430) 사이의 공간을 통해 주입되도록 구성될 수 있다.According to one embodiment of the present invention, in the injection molding step (S300), the insert resin may be configured to be injected downwardly from the upper portion of the bearing 400 toward the space between the housing 300 and the bearing 400, and the insert The resin may be configured to be injected through the space between the adjacent partition walls 430 .
또한, 본 발명의 일 실시예에 따르면, 사출 성형 단계(S300)에서 인서트 수지는 격벽(430) 사이의 공간에도 충진되어 인서트 몰딩부(500)를 형성하도록 구성될 수 있으며, 하우징(300)의 지지부(320)의 상단부에도 주입되어 인서트 몰딩부(500)를 형성하도록 구성될 수 있다.In addition, according to an embodiment of the present invention, in the injection molding step ( S300 ), the insert resin is also filled in the space between the partition walls 430 to form the insert molding part 500 , and the housing 300 is It may also be injected into the upper end of the support part 320 to form the insert molding part 500 .
이상 본 발명을 구체적인 구성요소 등과 같은 특정 사항들과 한정된 실시예에 의해 설명하였으나, 이들 실시예들은 본 발명의 보다 전반적인 이해를 돕기 위해서 제공된 것일 뿐, 본 발명이 이에 한정되는 것은 아니며, 본 발명이 속하는 기술분야에서 통상적인 지식을 가진 자라면 이러한 기재로부터 다양한 수정 및 변형을 꾀할 수 있다.The present invention has been described above with specific details such as specific components and limited embodiments, but these embodiments are provided only to help a more general understanding of the present invention, and the present invention is not limited thereto, and the present invention is not limited thereto. Those of ordinary skill in the art can devise various modifications and variations from these descriptions.
따라서, 본 발명의 사상은 앞서 설명된 실시예들에 국한되어 정해져서는 아니 되며, 후술하는 청구범위 뿐만 아니라 이 청구범위에 균등하게 또는 등가적으로 변형된 모든 것들은 본 발명의 사상의 범주에 속한다고 할 것이다.Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and that all equivalently or equivalently modified claims as well as the claims described below belong to the scope of the spirit of the present invention. something to do.

Claims (16)

  1. 볼부재(210)와 상기 볼부재(210)로부터 일측으로 연장하여 형성된 로드부재(220)를 구비하는 볼스터드(200)와;a ball stud 200 having a ball member 210 and a rod member 220 formed to extend to one side from the ball member 210;
    내부에 상기 볼부재(210)가 수용되는 수용공간(310)을 갖는 하우징(300)과;a housing 300 having an accommodating space 310 in which the ball member 210 is accommodated;
    상기 볼부재(210)의 외주면에 결합되는 베어링(400)과;a bearing 400 coupled to the outer circumferential surface of the ball member 210;
    상기 베어링(400)을 상기 하우징(300)에 고정시키는 인서트 몰딩부(500)를 포함하고,and an insert molding part 500 for fixing the bearing 400 to the housing 300,
    상기 하우징(300) 및 상기 베어링(400)은 상부가 개방되고 하부가 폐쇄된 컵 형상의 구조로 형성되고,The housing 300 and the bearing 400 are formed in a cup-shaped structure with an open top and a closed bottom,
    상기 인서트 몰딩부(500)는 상기 베어링(400)의 상부로부터 상기 하우징(300)과 상기 베어링(400) 사이의 공간을 향해 인서트 수지를 하방으로 주입하여 사출 성형되도록 구성되는,The insert molding part 500 is configured to be injection molded by injecting an insert resin downward from the upper part of the bearing 400 toward the space between the housing 300 and the bearing 400,
    볼조인트.ball joint.
  2. 제1항에 있어서,The method of claim 1,
    상기 베어링(400)의 상부 부분에는 반경방향 외측으로 돌출되어 형성된 격벽(430)이 하나 이상 구비되고,At least one partition wall 430 formed to protrude outward in the radial direction is provided on the upper portion of the bearing 400,
    상기 격벽(430)은 상하방향으로 연장되어 형성되는,The partition wall 430 is formed extending in the vertical direction,
    볼조인트.ball joint.
  3. 제2항에 있어서,3. The method of claim 2,
    상기 격벽(430)은 원주방향을 따라 이격되어 복수로 구비되는,The partition wall 430 is provided in plurality and spaced apart along the circumferential direction,
    볼조인트.ball joint.
  4. 제3항 또는 제3항에 있어서,4. The method of claim 3 or 3,
    상기 격벽(430)의 상단부(470)는 상기 베어링(400)의 상단부(480)에 비해 상부로 돌출되도록 형성되는,The upper end 470 of the partition wall 430 is formed to protrude upward compared to the upper end 480 of the bearing 400,
    볼조인트.ball joint.
  5. 제2항 내지 제4항 중 어느 한 항에 있어서,5. The method according to any one of claims 2 to 4,
    상기 하우징(300)의 내주면에는 반경방향 내측으로 돌출되어 형성된 지지부(320)가 구비되고,The inner peripheral surface of the housing 300 is provided with a support portion 320 formed to protrude inward in the radial direction,
    상기 격벽(430)의 반경방향 외측면(440)은 상기 지지부(320)의 반경방향 내측면(330)에 접촉하여 지지되도록 구성되는,The radially outer surface (440) of the partition wall (430) is configured to be supported in contact with the radially inner surface (330) of the support (320).
    볼조인트.ball joint.
  6. 제5항에 있어서,6. The method of claim 5,
    상기 하우징(300)의 지지부(320)는 상기 베어링(400)의 상단부(480)에 비해 상부의 위치에서 상기 격벽(430)의 반경방향 외측면(440)과 접촉하도록 구성되는,The support portion 320 of the housing 300 is configured to contact the radially outer surface 440 of the partition wall 430 in an upper position relative to the upper end 480 of the bearing 400 ,
    볼조인트.ball joint.
  7. 제1항 내지 제6항 중 어느 한 항에 있어서,7. The method according to any one of claims 1 to 6,
    상기 베어링(400)의 하단부는 상기 하우징(300)의 하단부에 접촉하도록 구성되는,The lower end of the bearing 400 is configured to contact the lower end of the housing 300,
    볼조인트.ball joint.
  8. 제7항에 있어서,8. The method of claim 7,
    상기 베어링(400)은 하단부의 외측면에 하방으로 돌출되어 형성된 돌기부(490)를 구비하고,The bearing 400 is provided with a protrusion 490 formed to protrude downward from the outer surface of the lower end,
    상기 하우징(300)은 하단부의 내측면에 하방으로 함몰되어 형성된 수용홈(340)을 구비하고,The housing 300 is provided with a receiving groove 340 formed by being depressed downwardly on the inner surface of the lower end,
    상기 돌기부(490)는 상기 수용홈(340) 내로 삽입되어 상기 수용홈(340)에 접촉하도록 구성되는,The protrusion 490 is inserted into the receiving groove 340 and configured to contact the receiving groove 340 ,
    볼조인트.ball joint.
  9. 볼부재(210) 및 로드부재(220)를 구비하는 볼스터드(200)와, 내부에 볼부재(210)가 수용되는 수용공간(310)을 갖는 하우징(300)과, 볼부재(210)의 외주면에 결합되는 베어링(400)을 준비하는 부품 준비 단계(S100)와;A ball stud 200 having a ball member 210 and a rod member 220, a housing 300 having an accommodating space 310 in which the ball member 210 is accommodated, and the ball member 210 A component preparation step (S100) of preparing the bearing 400 coupled to the outer circumferential surface;
    하우징(300)을 금형에 배치하고, 베어링(400)이 결합된 볼부재(210)를 하우징(300)의 수용공간(310) 내로 삽입하여 위치시키는 사출 성형 준비 단계(S200)와;An injection molding preparation step (S200) of placing the housing 300 in a mold and inserting the ball member 210 to which the bearing 400 is coupled into the receiving space 310 of the housing 300;
    하우징(300)과 베어링(400) 사이의 공간으로 인서트 수지를 주입해 인서트 몰딩부(500)를 형성하는 사출 성형 단계(S300)를 포함하고,and an injection molding step (S300) of injecting an insert resin into the space between the housing 300 and the bearing 400 to form the insert molding part 500,
    상기 부품 준비 단계(S100)에서 준비되는 하우징(300) 및 베어링(400)은 상부가 개방되고 하부가 폐쇄된 컵 형상의 구조로 형성되고,The housing 300 and the bearing 400 prepared in the component preparation step (S100) are formed in a cup-shaped structure with an open top and a closed bottom,
    상기 사출 성형 단계(S300)에서 인서트 수지는 베어링(400)의 상부로부터 하우징(300)과 베어링(400) 사이의 공간을 향해 하방으로 주입되어 인서트 몰딩부(500)를 사출 성형하도록 구성되는,In the injection molding step (S300), the insert resin is injected downwardly from the upper portion of the bearing 400 toward the space between the housing 300 and the bearing 400 to injection-mould the insert molding unit 500,
    볼조인트의 제조방법.A method of manufacturing a ball joint.
  10. 제9항에 있어서,10. The method of claim 9,
    상기 부품 준비 단계(S100)에서 준비되는 베어링(400)의 상부 부분에는 반경방향 외측으로 돌출되며 상하방향으로 연장하여 형성된 격벽(430)이 하나 이상 구비되는,The upper portion of the bearing 400 prepared in the component preparation step (S100) is provided with one or more partition walls 430 that protrude outward in the radial direction and extend in the vertical direction,
    볼조인트의 제조방법.A method of manufacturing a ball joint.
  11. 제10항에 있어서,11. The method of claim 10,
    상기 부품 준비 단계(S100)에서 준비되는 베어링(400)의 상부 부분에는 격벽(430)이 원주방향을 따라 이격되어 복수로 구비되고,In the upper part of the bearing 400 prepared in the component preparation step (S100), a plurality of partition walls 430 are provided with a plurality of spaced apart along the circumferential direction,
    상기 사출 성형 단계(S300)에서 인서트 수지는 인접한 격벽(430) 사이의 공간을 통해 주입되도록 구성되는,In the injection molding step (S300), the insert resin is configured to be injected through the space between the adjacent partition walls 430,
    볼조인트의 제조방법.A method of manufacturing a ball joint.
  12. 제10항 또는 제11항에 있어서,12. The method of claim 10 or 11,
    상기 부품 준비 단계(S100)에서 준비되는 베어링(400)은 격벽(430)의 상단부(470)가 베어링(400)의 상단부(480)에 비해 상부로 돌출되도록 형성되는,The bearing 400 prepared in the component preparation step (S100) is formed so that the upper end 470 of the bulkhead 430 protrudes upward compared to the upper end 480 of the bearing 400,
    볼조인트의 제조방법.A method of manufacturing a ball joint.
  13. 제10항 내지 제12항 중 어느 한 항에 있어서,13. The method according to any one of claims 10 to 12,
    상기 부품 준비 단계(S100)에서 준비되는 하우징(300)의 내주면에는 반경방향 내측으로 돌출되어 형성된 지지부(320)가 구비되고,The inner peripheral surface of the housing 300 prepared in the component preparation step (S100) is provided with a support portion 320 formed to protrude inward in the radial direction,
    상기 사출 성형 준비 단계(S200)에서 격벽(430)의 반경방향 외측면(440)은 지지부(320)의 반경방향 내측면(330)에 접촉하여 지지되도록 구성되는,In the injection molding preparation step (S200), the radially outer surface 440 of the partition wall 430 is configured to contact and support the radially inner surface 330 of the support portion 320,
    볼조인트의 제조방법.A method of manufacturing a ball joint.
  14. 제13항에 있어서,14. The method of claim 13,
    상기 사출 성형 준비 단계(S200)에서 하우징(300)의 지지부(320)는 베어링(400)의 상단부(480)에 비해 상부의 위치에서 상기 격벽(430)의 반경방향 외측면(440)과 접촉하도록 구성되는,In the injection molding preparation step (S200), the support part 320 of the housing 300 is in contact with the radial outer surface 440 of the partition wall 430 at an upper position compared to the upper end 480 of the bearing 400. composed,
    볼조인트의 제조방법.A method of manufacturing a ball joint.
  15. 제9항 내지 제14항 중 어느 한 항에 있어서,15. The method according to any one of claims 9 to 14,
    상기 사출 성형 준비 단계(S200)에서 베어링(400)의 하단부는 하우징(300)의 하단부에 접촉하도록 구성되는,The lower end of the bearing 400 in the injection molding preparation step (S200) is configured to contact the lower end of the housing 300,
    볼조인트의 제조방법.A method of manufacturing a ball joint.
  16. 제15항에 있어서,16. The method of claim 15,
    상기 부품 준비 단계(S100)에서 준비되는 베어링(400)은 하단부의 외측면에 하방으로 돌출되어 형성된 돌기부(490)를 구비하고,The bearing 400 prepared in the component preparation step (S100) is provided with a protrusion 490 formed to protrude downward from the outer surface of the lower end,
    상기 부품 준비 단계(S100)에서 준비되는 하우징(300)은 하단부의 내측면에 하방으로 함몰되어 형성된 수용홈(340)을 구비하고,The housing 300 prepared in the component preparation step (S100) is provided with a receiving groove 340 formed by being depressed downwardly on the inner surface of the lower end,
    상기 사출 성형 준비 단계(S200)에서 돌기부(490)는 수용홈(340) 내로 삽입되어 수용홈(340)에 접촉되도록 구성되는,In the injection molding preparation step (S200), the projection 490 is inserted into the receiving groove 340 and configured to contact the receiving groove 340,
    볼조인트의 제조방법.A method of manufacturing a ball joint.
PCT/KR2022/000446 2021-01-11 2022-01-11 Ball joint and method of manufacturing same WO2022149948A1 (en)

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KR10-2021-0003621 2021-01-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002206518A (en) * 2001-01-11 2002-07-26 Musashi Seimitsu Ind Co Ltd Ball joint
JP2011141020A (en) * 2010-01-11 2011-07-21 Somic Ishikawa Inc Bearing seat for ball joint
JP2015031384A (en) * 2013-08-06 2015-02-16 株式会社ソミック石川 Ball joint and method of manufacturing the same
US20180252259A1 (en) * 2017-03-01 2018-09-06 Federal-Mogul Motorparts Corporation Socket Assembly
KR20190070650A (en) * 2017-12-13 2019-06-21 주식회사 일진 Ball joint assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002206518A (en) * 2001-01-11 2002-07-26 Musashi Seimitsu Ind Co Ltd Ball joint
JP2011141020A (en) * 2010-01-11 2011-07-21 Somic Ishikawa Inc Bearing seat for ball joint
JP2015031384A (en) * 2013-08-06 2015-02-16 株式会社ソミック石川 Ball joint and method of manufacturing the same
US20180252259A1 (en) * 2017-03-01 2018-09-06 Federal-Mogul Motorparts Corporation Socket Assembly
KR20190070650A (en) * 2017-12-13 2019-06-21 주식회사 일진 Ball joint assembly

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