WO2025009114A1 - サスペンションアーム支持構造 - Google Patents

サスペンションアーム支持構造 Download PDF

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Publication number
WO2025009114A1
WO2025009114A1 PCT/JP2023/024980 JP2023024980W WO2025009114A1 WO 2025009114 A1 WO2025009114 A1 WO 2025009114A1 JP 2023024980 W JP2023024980 W JP 2023024980W WO 2025009114 A1 WO2025009114 A1 WO 2025009114A1
Authority
WO
WIPO (PCT)
Prior art keywords
cross member
vehicle
pair
connecting portion
support structure
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.)
Pending
Application number
PCT/JP2023/024980
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
誠 秋場
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to PCT/JP2023/024980 priority Critical patent/WO2025009114A1/ja
Priority to JP2025530899A priority patent/JPWO2025009114A1/ja
Publication of WO2025009114A1 publication Critical patent/WO2025009114A1/ja
Anticipated expiration legal-status Critical
Pending 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
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units

Definitions

  • the present invention relates to a suspension support structure that supports a suspension arm.
  • the vehicle body side end of the suspension arm is connected to a side frame that extends in the fore-aft direction of the vehicle.
  • An object of the present invention is to provide a suspension arm support structure that can ensure the strength of the side frame and the support rigidity of the suspension.
  • One aspect of the present invention is a vehicle comprising a pair of left and right side frames extending in the fore-and-aft direction of the vehicle, a pair of left and right brackets having front and rear connecting parts that connect arms that support the vehicle wheels, and a cross member that is installed between the pair of side frames, the cross member being disposed between the front and rear connecting parts, the brackets being connected to the side frames and also to the cross member below the side frames, and the front and rear connecting parts being located inward in the vehicle width direction from the side frames.
  • the strength of the side frame can be ensured, and the support rigidity of the bracket supporting the suspension can be ensured.
  • FIG. 1 is a perspective view showing an embodiment of a suspension arm support structure.
  • FIG. FIG. 2 is a three-view diagram of the bracket, the side frame, and the cross member of FIG. 1 . 2 is an explanatory diagram of an example of the configuration of an arm in the suspension arm support structure of FIG. 1 .
  • FIG. 2 is a bottom view of the suspension arm support structure of FIG. 1 .
  • FIG. 2 is a rear view of the suspension arm support structure of FIG. 1 .
  • the suspension arm support structure of the embodiment shown in FIG. 1 is applied to the rear wheel suspension of a vehicle, as an example.
  • a pair of left and right side frames 1 extending in the front-rear direction of the vehicle are arranged on both sides of the vehicle in the width direction.
  • the portions of the side frames 1 to which the rear wheel suspension is attached are all slightly curved inward in the vehicle width direction.
  • a cross member 2 is installed on the pair of left and right side frames 1 so as to connect the curved parts of the side frames 1 on the inside in the vehicle width direction. Both ends of the cross member 2 in the vehicle width direction are mainly connected and fixed to the inner side surface and the underside surface of the side frame 1 in the vehicle width direction.
  • a frame cross member 9 is installed on the pair of side frames 1 at the rear of the cross member 2, and is connected and fixed to the inner side surface and outer side surface and the underside surface of the side frame 1 in the vehicle width direction.
  • the side frames 1, cross members 2, and frame cross members 9 are strength members that make up the so-called chassis.
  • a pair of front brackets 3F and rear brackets 3R for connecting the arms 4U and 4L of the rear suspension are arranged at the connecting and fixing portion of the cross member 2 to the side frame 1.
  • the front brackets 3F and rear brackets 3R may be integral with each other on the left and right sides of the vehicle, but in this example, they are arranged at the front and rear of the cross member 2.
  • the front and rear brackets 3F, 3R are each connected and fixed to the side frame 1, and are also connected and fixed to the cross member 2 below the side frame 1.
  • Figure 2 is a side view and a bottom view showing the arm connecting portion 6 of the front bracket 3F and rear bracket 3R in particular.
  • the cylindrical (cylinder) shaped portion shown in the figure indicates the connecting portion 6 (bush) to which the vehicle body side ends of the arms 4U and 4L are connected.
  • the front bracket 3F supporting the rear left wheel suspension shown in FIG. 2 is provided with a front upper connecting part 6FU and a front lower connecting part 6FL
  • the rear bracket 3R is provided with a rear upper connecting part 6RU and a rear lower connecting part 6RL.
  • the front and rear vehicle body side ends of the upper A arm 4U are connected to the front upper connecting part 6FU and the rear upper connecting part 6RU of the front and rear brackets 3F and 3R, and the front and rear vehicle body side ends of the lower A arm 4L are connected to the front lower connecting part 6FL and the rear lower connecting part 6RL. All of these arm connecting parts 6 need to have their shafts for connecting the vehicle body side ends of the suspension arms located inside the side frame 1 in the vehicle width direction.
  • the arm connection parts 6 of these front and rear brackets 3F, 3R are provided further inward in the vehicle width direction than the side frame 1. Therefore, compared to a suspension arm support structure in which the vehicle body side end of the arm is connected to the side frame 1, the length of the arms 4U, 4L can be made larger, which makes it possible to reduce changes in the camber angle of the wheel when the wheel bounces, for example, and ensure vehicle stability.
  • the suspension of the left rear wheel in FIG. 1 is a traditional double wishbone type suspension with A arms 4U and 4L arranged above and below as shown in FIG.
  • the front and rear brackets 3F, 3R are each connected and fixed to the side frame 1 and to the cross member 2 below the side frame 1. That is, since each bracket 3F, 3R is connected and fixed to both the side frame 1 and the cross member 2 at their connection points, the front and rear brackets 3F, 3R have excellent support rigidity against input from the wheels.
  • the front upper connecting part 6FU and the rear upper connecting part 6RU of the front and rear brackets 3F, 3R are disposed in front and behind the cross member 2, and in this embodiment, the vehicle body side end of the upper A arm 4U is connected to the front upper connecting part 6FU and the rear upper connecting part 6RU by a through bolt that passes through the cross member 2.
  • the lower end (lower surface) of the cross member 2 is located between the front upper connecting part 6FU and the rear upper connecting part 6RU and the front lower connecting part 6FL and the rear lower connecting part 6RL. Therefore, rigidity against the upper input from the upper A arm 4U and the lower input from the lower A arm 4L is ensured. Note that due to the positioning of the rear lower connector 6RL, the lower end of the rear bracket 3R is located lower than the lower end of the front bracket 3F.
  • the lower end of the shock absorber 5 is connected to the lower A arm 4L, and the upper end is directly connected to the upper part of the side frame 1 via the mounting bracket 1a.
  • the front and rear brackets 3F, 3R are connected and fixed to the side frame 1 mainly on the inside in the vehicle width direction.
  • the upper end of the shock absorber 5 is often connected to the vehicle body rather than the chassis.
  • a ring structure is formed by the shock absorber 5, lower A arm 4L, front and rear brackets 3F, 3R, and side frame 1. Therefore, the side frame 1, which is a strength member, can receive the input, particularly with respect to the upward input from the lower A arm 4L, and rigidity against the upward input from the wheel is ensured.
  • the lower ends of the pair of left and right rear brackets 3R are connected by a connecting reinforcement part 7 that extends in the vehicle width direction, and therefore the connecting reinforcement part 7 is installed on the rear lower connecting part 6RL of the pair of left and right rear brackets 3R. That is, as shown in the side view of FIG. 2, the positions of the rear lower connecting part 6RL and the connecting reinforcement part 7 are almost the same when viewed from the side of the vehicle. This ensures the rigidity to support the suspension from the rear against input from the front acting on the wheel when the vehicle is traveling forward. Also, as is clear from the rear view of FIG.
  • a pair of left and right member members 8 extending toward the rear of the vehicle are connected and fixed to the connecting reinforcement 7 at a position toward the center of the vehicle width, and the rear ends of these member members 8 are connected and fixed to a frame cross member 9.
  • the pair of left and right member members 8 are each disposed at equal intervals from the center of the vehicle width between both ends of the connecting reinforcement 7 in the vehicle width direction and the center of the vehicle width direction.
  • This structure connects the rear wheel suspension arm support structure including the annular structure of the connecting reinforcement 7 to the frame cross member 9 and supports it from the rear of the vehicle, and can further improve the suspension support rigidity against inputs from the front of the vehicle acting on the rear wheels.
  • the bracket is divided into a front bracket 3F and a rear bracket 3R, but as described above, these brackets 3F, 3R may be integrated at the front and rear.
  • the front bracket 3F is provided with a front upper connecting portion 6FU and a front lower connecting portion 6FL
  • the rear bracket 3R is provided with a rear upper connecting portion 6RU and a rear lower connecting portion 6RL
  • only the front lower connecting portion 6FL that connects the vehicle body side end of the lower arm 4L to the front bracket 3F may be provided as the front connecting portion 6F
  • only the rear lower connecting portion 6RL may be provided as the rear connecting portion 6R on the rear bracket 3R.
  • the suspension arm support structure of this embodiment comprises a pair of left and right side frames 1 extending in the fore-and-aft direction of the vehicle, a pair of left and right front and rear brackets 3F, 3R having a front connecting portion 6F and a rear connecting portion 6R connecting the suspension arms 4U, 4L, and a cross member 2 mounted on the pair of side frames 1, with the cross member 2 being disposed between the front bracket 3F (front connecting portion 6F) and the rear bracket 3R (rear connecting portion 6R), the front and rear brackets 3F, 3R being connected and fixed to the side frame 1 and also connected and fixed to the cross member 2 below the side frame 1, with the front connecting portion 6F and rear connecting portion 6R being located further inward in the vehicle width direction than the side frame 1.
  • the front bracket 3F has a front upper connecting portion 6FU and a front lower connecting portion 6FL
  • the rear bracket 3R has a rear upper connecting portion 6RU and a rear lower connecting portion 6RL. Therefore, even if the suspension has an upper arm 4U and a lower arm 4L, the vehicle body side ends of those arms 4U, 4L can be connected to the respective connecting portions 6 so that the suspension is supported by the front and rear brackets 3F, 3R.
  • the lower end of the cross member 2 is located between the front upper connecting portion 6FU and the rear upper connecting portion 6RU and the front lower connecting portion 6FL and the rear lower connecting portion 6RL, thereby ensuring rigidity against upper inputs from the upper arm 4U and lower inputs from the lower arm 4L.
  • the shock absorber 5 when viewed from the side of the vehicle, is attached to the side frame 1 between the front connecting part 6F and the rear connecting part 6R, so that the upward input acting from the wheels can be received by the side frame 1, which is a strength member, thereby ensuring rigidity against the upward input from the wheels.
  • the side frame 1 which is a strength member, thereby ensuring rigidity against the upward input from the wheels.
  • it has a connecting reinforcement part 7 that connects the rear brackets 3R, and the connecting reinforcement part 7 is arranged to span the left and right rear connecting parts 6R when viewed from the rear of the vehicle, thereby ensuring the rigidity to support the suspension from the rear against inputs from the front acting on the wheels when the vehicle is traveling forward.
  • the connecting reinforcement portion 7 is positioned below and away from the cross member 2, and when viewed from the rear of the vehicle, a ring-shaped structure is formed by the cross member 2, the left and right rear brackets 3R, and the connecting reinforcement portion 7, thereby ensuring the rigidity to support the suspension from the inside in the vehicle width direction against inputs acting on the wheels from the side of the vehicle.
  • the connecting reinforcement 7 has a pair of left and right member members 8 that extend rearward of the vehicle and are connected to the frame cross member 9, and the member members 8 are positioned between both ends of the connecting reinforcement 7 in the vehicle width direction and the center in the vehicle width direction. This further improves the suspension support rigidity against inputs acting on the wheels from the front of the vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Body Structure For Vehicles (AREA)
PCT/JP2023/024980 2023-07-05 2023-07-05 サスペンションアーム支持構造 Pending WO2025009114A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2023/024980 WO2025009114A1 (ja) 2023-07-05 2023-07-05 サスペンションアーム支持構造
JP2025530899A JPWO2025009114A1 (https=) 2023-07-05 2023-07-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/024980 WO2025009114A1 (ja) 2023-07-05 2023-07-05 サスペンションアーム支持構造

Publications (1)

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WO2025009114A1 true WO2025009114A1 (ja) 2025-01-09

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PCT/JP2023/024980 Pending WO2025009114A1 (ja) 2023-07-05 2023-07-05 サスペンションアーム支持構造

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JP (1) JPWO2025009114A1 (https=)
WO (1) WO2025009114A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5931504U (ja) * 1982-08-24 1984-02-27 三菱自動車工業株式会社 フロントサスペンシヨンのクロスメンバ締結構造
JPH02136777U (https=) * 1989-04-20 1990-11-14
US6105984A (en) * 1993-04-14 2000-08-22 Oshkosh Truck Corporation Independent coil spring suspension for driven wheels
US6113144A (en) * 1999-10-21 2000-09-05 Dana Corporation Two-piece upper control arm and spring mounting bracket
US20120169023A1 (en) * 2011-01-05 2012-07-05 Tesla Motors, Inc. Vehicle Front Shock Tower

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5931504U (ja) * 1982-08-24 1984-02-27 三菱自動車工業株式会社 フロントサスペンシヨンのクロスメンバ締結構造
JPH02136777U (https=) * 1989-04-20 1990-11-14
US6105984A (en) * 1993-04-14 2000-08-22 Oshkosh Truck Corporation Independent coil spring suspension for driven wheels
US6113144A (en) * 1999-10-21 2000-09-05 Dana Corporation Two-piece upper control arm and spring mounting bracket
US20120169023A1 (en) * 2011-01-05 2012-07-05 Tesla Motors, Inc. Vehicle Front Shock Tower

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