WO2017126718A1 - Appareil à bras inférieur avant - Google Patents

Appareil à bras inférieur avant Download PDF

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Publication number
WO2017126718A1
WO2017126718A1 PCT/KR2016/000608 KR2016000608W WO2017126718A1 WO 2017126718 A1 WO2017126718 A1 WO 2017126718A1 KR 2016000608 W KR2016000608 W KR 2016000608W WO 2017126718 A1 WO2017126718 A1 WO 2017126718A1
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WO
WIPO (PCT)
Prior art keywords
lower arm
bracket
point
flange portion
flange
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2016/000608
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English (en)
Korean (ko)
Inventor
박종규
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hwashin Co Ltd
Original Assignee
Hwashin Co Ltd
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 Hwashin Co Ltd filed Critical Hwashin Co Ltd
Publication of WO2017126718A1 publication Critical patent/WO2017126718A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/02—Attaching arms to sprung part of vehicle

Definitions

  • the present invention relates to a front lower arm device, and more particularly, to a front lower arm device capable of improving moldability and preventing coating failure.
  • the suspension system includes a front lower arm and a front upper arm connecting the body and the wheel.
  • a ball joint is coupled to one side of the front lower arm
  • a G point bush is coupled to the other side of the front lower arm
  • an A point bush is installed near the center of the front lower arm.
  • the front lower arm is manufactured by press molding.
  • the A point bush pipe is conventionally formed by press molding on the front lower arm, the press forming process is complicated by the difficulty of forming the A point bush pipe.
  • An object of the present invention is to provide a front lower arm device capable of improving moldability and preventing coating failure.
  • the front lower arm device includes: a lower arm body having a G point coupling portion formed to be connected to a subframe, and a B point coupling portion formed to be connected to a knuckle portion; And an A point bracket which is coupled between the G point coupling portion and the B point coupling portion in the lower arm body, and the A point coupling portion is formed to be connected to the subframe.
  • the A point bracket may be welded to the lower arm body.
  • the lower arm body includes: a lower arm plate portion at which both the G point coupling portion and the B point coupling portion are formed; A first lower arm flange portion formed along one longitudinal direction of the lower arm plate portion in a width direction of the lower arm plate portion; And a second lower arm flange portion formed along the length direction of the lower arm plate portion at the other side in the width direction of the lower arm plate portion.
  • the A point bracket may include a bracket plate part welded to one surface of the lower arm plate part; A first bracket flange portion formed at the B point coupling portion side of the bracket plate portion and welded to the first lower arm flange portion; And a second bracket flange part formed at the G point coupling part side of the bracket plate part and welded to the first lower arm flange part.
  • the first bracket flange portion may be in contact with the first lower arm flange portion, and an end portion of the first bracket flange portion may be welded to the first lower arm flange portion.
  • An end portion of the second bracket flange portion may be welded to the first lower arm flange portion.
  • a noise reduction part having a height lower than that of the first lower arm flange part may be formed in a section between the first bracket flange part and the second bracket flange part in the first lower arm flange part.
  • a coating liquid discharge part may be formed in which some sections of the lower arm body and the contact portion of the A point bracket are spaced apart from each other so that the coating liquid inside the A point bracket is discharged to the outside of the A point bracket.
  • the coating liquid discharge part may be formed by spaced apart from a first connection part to which the bracket plate part and the first bracket flange part are connected, and a first round part to which the lower arm plate part and the first lower arm flange part are connected.
  • the coating liquid discharge part may be formed by spaced apart from a second connection part connecting the bracket plate part and the second bracket flange part, and a second round part connecting the lower arm plate part and the second lower arm flange part.
  • the formability of the lower arm body can be improved.
  • the first bracket flange portion of the A point bracket is welded to the first lower arm flange portion, and the second bracket flange portion is welded to the second lower arm flange portion, the first lower arm flange portion to the first The rigidity of the curved portion can be increased. Therefore, even when a bending moment is applied to the lower arm body due to stress or impact on the G point coupling portion and the B point coupling portion, it is possible to prevent the buckling from occurring at the second curved portion of the second lower arm flange portion.
  • the noise reduction portion is formed lower than the first lower arm flange portion, the noise frequency inside the lower arm body can be emitted to the A point bracket side through the noise reduction portion. Therefore, it is possible to prevent the noise from increasing inside the front lower arm device.
  • the noise reduction portion constitutes a part of the first lower arm flange portion, the rigidity of the first curved portion can be further reinforced.
  • the coating liquid discharge part discharges the coating liquid from the inside of the A-point bracket, it is possible to prevent the coating failure from occurring in the coupling portion of the lower arm body and the A-point bracket.
  • FIG. 1 is a perspective view showing a front lower arm device according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view illustrating a state in which a lower arm body and an A point bracket are separated in a front lower arm device according to an embodiment of the present invention.
  • FIG 3 is an exploded perspective view showing a lower portion of the front lower arm device according to an embodiment of the present invention.
  • FIG. 4 is a perspective view showing a lower portion of the front lower arm device according to an embodiment of the present invention.
  • FIG 5 is an enlarged perspective view illustrating a state in which a point A bracket is coupled to a lower arm body in the front lower arm device according to the exemplary embodiment of the present invention.
  • FIG. 6 is an enlarged perspective view illustrating a welded portion of a lower arm body and an A point bracket in a front lower arm device according to an embodiment of the present invention.
  • FIG. 7 is an enlarged perspective view illustrating a coating liquid discharge part formed between the lower arm body and the A-point bracket in the front lower arm device according to the embodiment of the present invention.
  • FIG. 1 is a perspective view showing a front lower arm device according to an embodiment of the present invention
  • Figure 2 shows a state in which the lower arm body and the A point bracket is separated in the front lower arm device according to an embodiment of the present invention
  • 3 is an exploded perspective view illustrating a lower part of the front lower arm device according to an embodiment of the present invention
  • FIG. 4 is a perspective view showing a lower part of the front lower arm device according to an embodiment of the present invention. to be.
  • the front lower arm device includes a lower arm body 110 and an A point bracket 120.
  • the lower arm body 110 is formed with a G-point coupling portion 111 to be connected to a subframe (not shown), and a B-point coupling portion 113 is formed to be connected to a knuckle portion (not shown).
  • G point coupling portion 111 is burring (burring) in the form of a flange.
  • the lower arm body 110 includes a lower arm plate portion 114 having a G point coupling portion 111 and a B point coupling portion 113 formed at both ends, and a lower arm at one side in a width direction of the lower arm plate portion 114.
  • the lower arm body 110 is formed in a curved shape round the center.
  • a first curved portion 115a is formed at the center of the first lower arm flange portion 115
  • a second curved portion 117a is formed at the center of the second lower arm flange portion 117. Since the lower arm body 110 is formed to be bent in a rounded shape, when a stress or an impact is applied to the G-point coupling part 111 and the B-point coupling part 113, the lower arm body 110 may be evenly distributed throughout the lower arm body 110. have. Therefore, even if a bending moment is applied to the lower arm body 110, it is possible to prevent the buckling from occurring in the lower arm body 110.
  • the lower arm body portion 110 is connected to the lower arm plate portion 114 and the first lower arm flange portion 115 is called the first round portion 115b, and the lower arm plate portion 110 in the lower arm body 110 A portion to which the 114 and the second lower arm flange portion 117 are connected is defined as a second round portion 117b.
  • the A point bracket 120 is manufactured separately from the lower arm body 110 to be coupled between the G point coupling part 111 and the B point coupling part 113 in the lower arm body 110.
  • An A point coupling part 126 is formed in the A point bracket 120 to be connected to the subframe. Since the A point bracket 120 is manufactured separately from the lower arm body 110, the formability can be improved when the front lower arm device is press-molded. Therefore, productivity of a front lower arm apparatus can be improved.
  • a point bracket 120 is coupled to the lower arm body 110 by welding. Since the A point bracket 120 is manufactured separately from the lower arm body 110 and welded, the formability of the front lower arm device can be improved.
  • a point coupling portion 126 is formed in a ring shape so that the A point bush is pressed into the center. Since the A point coupling portion is formed in a ring shape, the vibration transmitted to the A point bush can be buffered.
  • the A point bracket 120 is formed on the bracket plate portion 121 welded to one surface of the lower arm plate portion 114 and the B point coupling portion 113 side of the bracket plate portion 121, and the first lower arm.
  • a first bracket flange portion 123 welded to the flange portion 115 and a G-point engaging portion 111 side of the bracket plate portion 121 and welded to the first lower arm flange portion 115; 2 bracket flange portion (125).
  • bracket plate portion 121 is in contact with one surface of the lower arm plate 114 and the first bracket flange portion 123 and the second bracket flange portion 125 are welded to the first lower arm flange portion 115,
  • the rigidity of the vicinity of the center portion and the first curved portion 115a may be reinforced. Since the rigidity of the first curved portion 115a near the center of the lower arm body 110 is reinforced by the A-point bracket 120, stress or impact is applied to the G-point coupling portion 111 and the B-point coupling portion 113.
  • bracket plate portion 121 is in surface contact with one surface of the lower arm plate 114, and the first bracket flange portion 123 and the second bracket flange portion 125 are connected to the first lower arm flange portion 115.
  • bracket plate portion 121 is in linear contact with one surface of the lower arm plate 114, and the first bracket flange portion 123 and the second bracket flange portion 125 are connected to the first lower arm flange portion 115. Can be welded. Therefore, since the bearing force of the end of the bracket plate portion 121 acts centrally on the lower arm plate 114, the rigidity of the first curved portion 115a can be reinforced.
  • the first bracket flange portion 123 is in contact with the first lower arm flange portion 115, and the end of the first bracket flange portion 123 is welded to the first lower arm flange portion 115. Since the first bracket flange portion 123 contacts the first lower arm flange portion 115, the rigidity of the first curved portion 115a positioned at the center of the first lower arm flange portion 115 may be further reinforced. . Therefore, even if a bending moment (arrow direction in FIG. 4) is applied to the lower arm body 110 as a stress or an impact is applied to the G-point engaging portion 111 and the B-point engaging portion 113, the second lower arm flange portion Buckling can be prevented from occurring in the second curved portion 117a of 117.
  • first bracket flange portion 123 is in surface contact with the first lower arm flange portion 115, and the end of the first bracket flange portion 123 is welded to the first lower arm flange portion 115. Since the first bracket flange portion 123 is in surface contact with the first lower arm flange portion 115, the rigidity of the first curved portion 115a positioned at the center of the first lower arm flange portion 115 may be further reinforced. have.
  • first bracket flange portion 123 is in line contact with the first lower arm flange portion 115, and the end of the first bracket flange portion 123 is welded to the first lower arm flange portion 115. Since the first bracket flange portion 123 is in linear contact with the first lower arm flange portion 115, the bearing force of the end of the first bracket flange portion 123 is intensively applied to the first curved portion 115a. Deformation of the curved portion 115a can be suppressed.
  • An end portion of the first bracket flange portion 123 is formed to be inclined so that the width thereof becomes narrower toward the G point coupling portion 111. Since the end portion of the first bracket flange portion 123 is formed to be inclined, the weld portion W of the first bracket flange portion 123 and the first lower arm flange portion 115 is formed to be inclined. Since the weld portion W of the first bracket flange portion 123 is formed to be inclined, the weld strength may increase as the length of the weld portion W becomes longer.
  • the second bracket flange portion 125 is welded to the first lower arm flange portion 115. At this time, the end of the second bracket flange portion 125 abuts against the first lower arm flange portion 115 and then the end of the second bracket flange portion 125 and the first lower arm flange portion 115 are welded. Since the end portion of the second bracket flange portion 125 is welded to the first lower arm flange portion 115, the second bracket flange portion 125 is formed together with the first bracket flange portion 123 of the first curved portion 115a. It can support both sides. Therefore, the rigidity of the first curved portion 115a can be increased.
  • first bracket flange portion 123 and the second bracket flange portion 125 are welded to the first lower arm flange portion 115, the welding of the first bracket flange portion 123 and the second bracket flange portion 125 is performed.
  • the site is located in the plane of the first lower arm flange portion 115 so that a welding torch (not shown) can easily access the weld site. Therefore, the A point bracket 120 is easily welded to the lower arm body 110, and the welding time can be shortened.
  • the A point bracket 120 is connected to the lower arm body 110 by welding, the contact area between the lower arm body 110 and the A point bracket 120 is increased. Therefore, since the load acting on the lower arm body 110 and the A-point bracket 120 can be evenly distributed, buckling of the lower arm body 110 can be prevented.
  • FIG 5 is an enlarged perspective view illustrating a state in which a point A bracket is coupled to a lower arm body in the front lower arm device according to the exemplary embodiment of the present invention.
  • the noise is lower than that of the first lower arm flange portion 115.
  • Reduction portion 116 is formed. Since the noise reduction unit 116 is formed to have a height lower than that of the first lower arm flange portion 115, the noise frequency is blocked by the first lower arm flange portion 115 and the second lower arm flange portion 117. It can be prevented from hovering inside the body 110. In other words, the noise frequency inside the lower arm body 110 may be emitted to the A point bracket 120 through the noise reduction unit 116. Therefore, it is possible to prevent the noise from increasing inside the front lower arm device.
  • the noise reduction unit 116 is formed lower than the height of the first lower arm flange portion 115 but higher than the lower arm plate portion 114 of the lower arm body 110, the rigidity of the first curved portion 115a is increased. This can be reinforced. Since the rigidity is reinforced at the first curved portion 115a of the first lower arm flange portion 115, the buckling occurs at the second curved portion 117a of the second lower arm flange portion 117 opposite to the first curved portion 115a. Can be prevented from occurring.
  • FIG. 6 is an enlarged perspective view illustrating a welded portion of a lower arm body and an A-point bracket in a front lower arm device according to an embodiment of the present invention
  • FIG. 7 is a lower arm in a front lower arm device according to an embodiment of the present invention.
  • the coating liquid discharge part 130 is spaced apart from the interval is formed. Since the coating liquid discharge part 130 discharges the coating liquid from the inside of the A-point bracket 120, it is possible to prevent the coating failure from occurring between the lower arm body 110 and the A-point bracket 120. Therefore, corrosion can be prevented from occurring at the contact portion between the A-point bracket 10 and the lower arm body 110.
  • the coating liquid discharge part 130 includes a first connection part 123b to which the bracket plate part 121 and the first bracket flange part 123 are connected, and the lower arm plate part 114 and the first lower arm flange part 115. ) Is formed as the first round part 115b to which is connected is spaced apart. In this case, as the radius of curvature of the first connecting portion 123b is smaller than the radius of curvature of the first round portion 115b, the first connecting portion 123b and the first round portion 115b may be spaced apart from each other. Since the coating liquid discharge part 130 is formed between the first round part 115b and the first connection part 123b, the coating liquid discharge part 130 is disposed on the lower arm body 110 or the A-point bracket 120. There is no need to form a separate structure. Therefore, the shape of the front lower arm device can be prevented from being complicated.
  • first connecting portion 123b and the first round portion 115b may be spaced apart from each other.
  • the coating liquid discharge part 130 includes a second connection part 125b to which the bracket plate part 121 and the second bracket flange part 125 are connected, and a lower arm plate part 114 and a second lower arm flange part 117. ) Is formed as the second round portions 117b to which they are connected are spaced apart. In this case, as the radius of curvature of the second connecting portion 125b is smaller than the radius of curvature of the second round portion 117b, the second connecting portion 125b and the second round portion 117b may be spaced apart from each other. Since the coating liquid discharge part 130 is formed between the second round part 117b and the second connection part 125b, the coating liquid discharge part 130 is disposed on the lower arm body 110 or the A-point bracket 120. There is no need to form a separate structure. Therefore, the shape of the front lower arm device can be prevented from being complicated.
  • the second connecting portion 125b and the second round portion 117b may be spaced apart from each other.
  • the outer surface of the lower arm body 110 and the end of the A point bracket 120 is welded.
  • the welding portion (W) is formed at a portion of the end of the A-point bracket 120 except for the portion where the coating liquid discharge portions 130 and 131 are formed. That is, since the weld part W is formed except portions corresponding to the first round part 115b, the first connection part 123b, and the second connection part 125, the weld part W may be formed intermittently. Therefore, it is possible to prevent the coating liquid discharge parts 130 and 131 from being blocked by the welding part W.
  • the weld part W is formed to avoid the first round part 115b, the first connection part 123b, and the second connection part 125, which are the parts where the stress is concentrated, the endurance life and the joint strength of the weld part W. Can improve.
  • the moldability of the lower arm body 110 may be improved.
  • first bracket flange portion 123 of the A point bracket 120 is welded to the first lower arm flange portion 115
  • the second bracket flange portion 125 of the A point bracket 120 is the second lower Since it is welded to the arm flange part 117, the rigidity of the 1st curved part 115a in the 1st lower arm flange part 115 can be increased. Therefore, even if a bending moment is applied to the lower arm body 110 as a stress or an impact acts on the G-point engaging portion 111 and the B-point engaging portion 113, the second lower arm flange portion 117 is formed. Buckling can be prevented from occurring in the two curved portions 117a.
  • the noise reduction unit 116 is formed to have a lower height than the first lower arm flange portion 115, the noise frequency inside the lower arm body 110 is the point A bracket 120 through the noise reduction unit 116. Can be released to the side. Therefore, it is possible to prevent the noise from increasing inside the front lower arm device.
  • the noise reduction unit 116 constitutes a part of the first lower arm flange portion 115, the stiffness of the first curved portion 115a may be further reinforced.
  • coating liquid discharge part 130 discharges the coating liquid between the lower arm body 110 and the A-point bracket 120, coating failure occurs between the lower arm body 110 and the A-point bracket 120. Can be prevented.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

La présente invention concerne un appareil à bras inférieur avant. L'appareil à bras inférieur avant de l'invention comprend : un corps de bras inférieur comprenant une partie de couplage en un point G formée pour permettre au corps de bras inférieur d'être raccordé à un châssis secondaire et une partie de couplage en un point B formée pour permettre au corps de bras inférieur d'être raccordé à une partie d'articulation ; et une attache en un point A couplée à une partie située entre la partie de couplage en un point G et la partie de couplage en un point B dans le corps de bras inférieur et ayant une partie de couplage en un point A formée pour permettre à l'attache d'être raccordée au châssis secondaire.
PCT/KR2016/000608 2016-01-20 2016-01-20 Appareil à bras inférieur avant Ceased WO2017126718A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0007012 2016-01-20
KR1020160007012A KR20170087266A (ko) 2016-01-20 2016-01-20 프론트 로어암 장치

Publications (1)

Publication Number Publication Date
WO2017126718A1 true WO2017126718A1 (fr) 2017-07-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/000608 Ceased WO2017126718A1 (fr) 2016-01-20 2016-01-20 Appareil à bras inférieur avant

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KR (1) KR20170087266A (fr)
WO (1) WO2017126718A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022070248A1 (fr) * 2020-09-29 2022-04-07 株式会社ヨロズ Structure de suspension de véhicule et son procédé de fabrication

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108162708B (zh) * 2017-12-26 2019-08-30 清华大学苏州汽车研究院（吴江） 一种用于骡车阶段的下摆臂
US11772443B1 (en) * 2022-05-02 2023-10-03 Jason Weller Upper shock mount brace
KR102915398B1 (ko) * 2023-10-23 2026-01-20 (주)화신 차량용 로어암 조립장치

Citations (5)

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Publication number Priority date Publication date Assignee Title
KR200237455Y1 (ko) * 1997-12-19 2001-10-25 이계안 승용차 프론트 로어암 구조
KR20020090498A (ko) * 2001-05-28 2002-12-05 현대자동차주식회사 로어아암의 저더 저감장치
KR101509977B1 (ko) * 2013-11-20 2015-04-07 현대자동차주식회사 표준형 크로스맴버
KR20150066110A (ko) * 2013-12-06 2015-06-16 현대자동차주식회사 트레일링암의 구조
KR101553811B1 (ko) * 2014-05-30 2015-09-18 주식회사화신 프론트 로워암장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200237455Y1 (ko) * 1997-12-19 2001-10-25 이계안 승용차 프론트 로어암 구조
KR20020090498A (ko) * 2001-05-28 2002-12-05 현대자동차주식회사 로어아암의 저더 저감장치
KR101509977B1 (ko) * 2013-11-20 2015-04-07 현대자동차주식회사 표준형 크로스맴버
KR20150066110A (ko) * 2013-12-06 2015-06-16 현대자동차주식회사 트레일링암의 구조
KR101553811B1 (ko) * 2014-05-30 2015-09-18 주식회사화신 프론트 로워암장치

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022070248A1 (fr) * 2020-09-29 2022-04-07 株式会社ヨロズ Structure de suspension de véhicule et son procédé de fabrication
JPWO2022070248A1 (fr) * 2020-09-29 2022-04-07
US12097743B2 (en) 2020-09-29 2024-09-24 Yorozu Corporation Suspension structure for vehicle and method of manufacturing the same
JP7615159B2 (ja) 2020-09-29 2025-01-16 株式会社ヨロズ 車両サスペンション用構造体およびその製造方法

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