WO2013094580A1 - サスペンションアーム取付構造 - Google Patents
サスペンションアーム取付構造 Download PDFInfo
- Publication number
- WO2013094580A1 WO2013094580A1 PCT/JP2012/082736 JP2012082736W WO2013094580A1 WO 2013094580 A1 WO2013094580 A1 WO 2013094580A1 JP 2012082736 W JP2012082736 W JP 2012082736W WO 2013094580 A1 WO2013094580 A1 WO 2013094580A1
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- WO
- WIPO (PCT)
- Prior art keywords
- plate
- vehicle
- main body
- arm
- shaft portion
- Prior art date
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/001—Suspension arms, e.g. constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/005—Ball joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/14—Mounting of suspension arms
- B60G2204/143—Mounting of suspension arms on the vehicle body or chassis
- B60G2204/1431—Mounting of suspension arms on the vehicle body or chassis of an L-shaped arm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/41—Elastic mounts, e.g. bushings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/416—Ball or spherical joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/012—Hollow or tubular elements
- B60G2206/0122—Hollow or tubular elements having a U profile with plate closing the profile in the total or partial length of the element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/10—Constructional features of arms
- B60G2206/122—Constructional features of arms the arm having L-shape
Definitions
- the present invention relates to a suspension arm mounting structure for mounting a suspension arm that swingably supports a wheel side with respect to a vehicle body side.
- Patent Document 1 discloses a plurality of support portions in a control arm 1 having a main body portion 2 and a plurality of support portions 3 as shown in FIG.
- a bearing journal 4 is disclosed in which one of the three is integrally formed with the main body 2 and formed by bending a metal plate.
- the bearing journal 4 extends from the main body 2 having a substantially U-shaped cross section, and is a funnel-shaped transition portion that gradually tapers between the main body 2 and the bearing journal 4 toward the bearing journal 4. By providing 5, the bearing journal 4 is bent into a substantially cylindrical shape.
- the rigidity of the bearing journal 4 is increased by bonding or welding the end surfaces 7 and 7 of the leg portions 6 and 6 constituting the bearing journal 4. Is disclosed.
- a bonding operation such as adhesion or welding is further added, which may increase the number of manufacturing steps and deteriorate the production efficiency.
- a columnar support member 8 (see FIG. 12C) is disposed inside the bearing journal 4. Is disclosed. In this case, the provision of the support member 8 causes a problem that the manufacturing cost increases and the weight of the entire suspension arm increases.
- a general object of the present invention is to provide a suspension arm mounting structure capable of reducing the manufacturing cost by simplifying the manufacturing process and achieving weight reduction.
- a main object of the present invention is to provide a suspension arm mounting structure capable of ensuring predetermined rigidity and strength.
- the present invention provides a suspension arm mounting structure for mounting a suspension arm that swingably supports a wheel side with respect to a vehicle body side, and is disposed between the wheel side and the vehicle body side.
- An arm main body composed of a plate-shaped member, an elastic member provided between the arm main body and the vehicle body, and extends from the arm main body toward the vehicle front-rear direction or the vehicle width direction,
- a cylindrical or closed cross-sectionally shaped shaft portion that is press-fitted or fitted to the inner peripheral side of the elastic member, and the shaft portion has both end portions of the plate-like member facing each other, and the opposite ends It has the biasing part which urges
- the both end portions of the plate-like member constituting the cylindrical portion or the closed cross-section-shaped shaft portion have the urging portions that urge and abut so as to press each other.
- attaches or welds a part becomes unnecessary, and the rigidity of a shaft part can be improved.
- both end portions are in contact with each other while being biased to each other, so that it is possible to prevent the contact portions of both end portions from being displaced.
- the manufacturing process can be simplified to reduce the manufacturing cost, and the weight can be reduced.
- predetermined rigidity and strength can be ensured, and these manufacturing costs, weight reduction, simplification of workability, and various elements of rigidity and strength can be harmonized and compatible. .
- the present invention provides a horizontal portion in which the arm main body portion extends in a substantially horizontal direction when attached to a vehicle body, a vertical portion in which a peripheral edge of the horizontal portion is bent downward, and a lower edge of the vertical portion.
- a reverse flange portion bent inward, and both end portions of the plate-like member constituting the shaft portion are constituted by opposing end portions of the reverse flange portion.
- a closed cross section can be continuously formed from the arm main body portion to the shaft portion. Rigidity between the main body portion and the shaft portion (transition portion) can be ensured.
- the reverse flange portion has end faces opposed to each other, and the end face of the reverse flange portion gradually approaches from the arm main body portion toward the shaft portion and comes into contact with the shaft portion. It is characterized by being provided so that it may mutually bias.
- the end face of the reverse flange portion gradually approaches as it moves from the arm main body portion toward the shaft portion, abuts on the shaft portion, and urges each other, so that the arm body portion and the shaft portion are urged to each other. Abrupt stress concentration can be avoided and rigidity and strength can be improved.
- the present invention provides a concave portion formed at one end portion of the plate-like member that is brought into contact with and brought into contact with the opposite opposite end portions, and a convex portion is provided at the other end portion of the plate-like member, The convex portions are fitted to each other, and a clearance is provided between the concave portions and the convex portions.
- the both ends of the plate-like member constituting the shaft portion are in contact with each other, and the recess and the projection are fitted with each other through the clearance provided between the recess and the projection. .
- the protruding dimension of the convex part becomes longer than a predetermined length.
- the recess size of the concave portion becomes shallow, it is possible to prevent the both end portions of the plate-like member constituting the shaft portion from being in a non-contact state, and to improve the processing accuracy.
- by fitting the concave portion and the convex portion it is possible to reliably prevent the both end portions from being displaced in the axial direction when force is input from the wheel.
- a suspension arm mounting structure that simplifies the manufacturing process, reduces manufacturing costs, achieves weight reduction, and can secure predetermined rigidity and strength is obtained.
- FIG. 1 is a perspective view of a lower arm to which a suspension arm mounting structure according to an embodiment of the present invention is applied.
- A is a perspective view of an arm main body constituting the lower arm of FIG. 1
- (b) is a longitudinal sectional view taken along line BB of (a)
- (c) is a cross-sectional view of C-
- FIG. 4D is a longitudinal sectional view taken along line C in FIG. 3D
- FIG. 4D is a longitudinal sectional view taken along line DD in FIG. It is a top view of the arm main-body part shown to Fig.2 (a).
- FIG. 4C is a longitudinal sectional view taken along line EE in FIG. It is a perspective view which shows the state by which a shaft part is press-fit or fitted with respect to the rubber elastic body of a back bush.
- (A) is a perspective view which shows the urging
- (b) is a recessed part and a convex part in the state by which the recessed part and the convex part were fitted together It is a partial expansion perspective view which shows the clearance formed between these.
- (A), (b) is a schematic diagram which shows the 1st example which forms an urging
- (A), (b) is a schematic diagram which shows the 2nd example which forms an urging
- FIG. 5 is a partially omitted perspective view of a lower arm according to another embodiment of the present invention.
- A) is a perspective view of a control arm according to the prior art
- (b) is a longitudinal sectional view taken along line FF in (a)
- (c) is a perspective view of a support member.
- FIG. 1 is a perspective view of a lower arm to which a suspension arm mounting structure according to an embodiment of the present invention is applied
- FIG. 2A is a perspective view of an arm main body part constituting the lower arm of FIG. 1
- FIG. 2 (c) is a longitudinal sectional view taken along line CC in FIG. 2 (a)
- FIG. FIG. 2A is a longitudinal sectional view taken along the line DD in FIG. 2A
- FIG. 3 is a plan view of the arm main body shown in FIG.
- front and rear indicated by arrows in each figure indicates the front and rear direction of the vehicle
- up and down indicates the vertical direction of the vehicle (vertical direction)
- left and right indicates the left and right as viewed from the driver's seat.
- the direction (vehicle width direction) is shown.
- the suspension 10 that supports the wheel side so as to be swingable with respect to the vehicle body side of the vehicle includes a lower arm 12 that functions as a suspension arm and is formed in a substantially L shape in plan view.
- a substantially L-shaped lower arm 12 is mentioned as the example, it is not limited to this, For example, it applies with respect to the lower arm of other shapes, such as a substantially A shape. It is also possible.
- the lower arm 12 is disposed between the wheel side and the vehicle body side, and is a single plate-like member 59 (FIGS. 7A, 7B to 10A to 10 described later).
- the arm main body 14 is formed by bending (see (d)).
- a rectangular tube-shaped shaft portion 16 having an axis in the vehicle front-rear direction is provided at the rear end portion of the arm main body portion 14 in the vehicle front-rear direction.
- the shaft portion 16 also functions as a shaft portion having a closed cross section that extends in the vehicle front-rear direction and has a closed cross section (see FIG. 2B) whose longitudinal cross section orthogonal to the axial direction is substantially rectangular. .
- the longitudinal section orthogonal to the axial direction of the cylindrical portion 16 is formed in a rectangular shape as shown in FIG. 2B as an example, but is not limited to this, for example, It is good to form in the polygonal shape which has a some corner
- the arm main body 14 is provided on the upper surface in a state of being attached to the vehicle body, and has a horizontal portion 14a having a plurality of flat surfaces extending in a substantially horizontal direction.
- the vertical portion 14b is formed by bending the peripheral edge of the horizontal portion 14a downward
- the reverse flange portion 14c is formed by bending the lower edge of the vertical portion 14b inward.
- the end face (end part) of the reverse flange part 14c constitutes both end faces 50a, 50b of the plate-like member 59 constituting the shaft part 16, as will be described later.
- the arm main body portion 14 is attached to the vehicle body on the front side of the vehicle, and located on the vehicle rear side with respect to the front attachment portion 18. And a rear mounting portion 20 attached to the body.
- the case where the axial part 16 is provided in the back attachment part 20 is illustrated.
- FIG. 1 schematically shows a state in which the lower arm 12 is disposed between a left front wheel FL of a vehicle (not shown) and a vehicle body (not shown).
- an axis L connecting the front mounting portion 18 and the rear mounting portion 20 is indicated by a one-dot chain line, and the lower arm 12 swings with respect to the vehicle body with the axis L as a swing center (swing shaft). Supported as possible.
- the front mounting portion 18 is provided with an outer peripheral support portion 22 extending from the right end portion of the arm main body portion 14 in the vehicle width direction toward the vehicle body side.
- a front bush 24 that supports a shaft (not shown) fixed to the vehicle body side is attached to the outer periphery support portion 22.
- the outer peripheral support portion 22 is provided with a pair of support pieces 28 having support holes 26 that branch from the arm main body portion 14 and face each other and pass through in a substantially circular shape.
- the pair of support pieces 28 are provided with annular flange portions 30 that protrude from the peripheral edge portions of the support holes 26 facing each other toward the support hole 26 on the other side.
- the annular flange portion 30 is formed by, for example, a well-known burring process.
- FIG. 4A is a partially enlarged plan view showing a front bush and a rear bush arranged along the vehicle front-rear direction on the arm body
- FIG. 4B is a view from the direction of arrow X in FIG.
- FIG. 4C is a longitudinal sectional view taken along the line EE of FIG. 4A.
- the front bush 24 is a metal outer cylinder 32 that is fitted and held in the support holes 26 of the pair of support pieces 28, and a holding that is fitted in the outer cylinder 32.
- a member 34 and a substantially cylindrical rubber elastic body 38 having a through hole 36 for supporting a shaft by press-fitting a shaft (not shown) fixed to the vehicle body side are provided.
- an enlarged diameter portion 32 a that functions as a stopper portion when the front bush 24 is press-fitted into the support hole 26 is provided.
- the rear mounting portion 20 is provided with a rear bush 42 via a bracket 40 attached and fixed to the vehicle body side.
- the rear bush 42 includes a metal outer cylinder 44 that is fixed or press-fitted into the cylindrical portion 40a of the bracket 40, and a substantially cylindrical rubber elastic body 46 that is held in the outer cylinder 44 and has an axis in the vehicle front-rear direction. Is provided.
- the rubber elastic body 46 functions as “an elastic member provided between the arm main body and the vehicle body”.
- FIG. 5 is a perspective view showing a state in which the shaft portion is press-fitted or fitted to the rubber elastic body of the rear bush, and FIG. 6A is formed by abutting the both end faces of the plate-like member by bending.
- FIG. 6B is a perspective view showing the urging portion formed between the concave portion and the convex portion in a state where the concave portion and the convex portion formed on both end faces of the plate-like member are fitted together. It is a partial expansion perspective view which shows clearance.
- a through-hole 48 is formed which penetrates along the axial direction and has a substantially rectangular shape when viewed from the side.
- the longitudinal section perpendicular to the axial direction of the through hole 48 is formed in a shape corresponding to a polygonal shape having a plurality of corners of the shaft portion 16 provided at the rear end portion of the arm main body portion 14. 16 is press-fitted or fitted into the substantially rectangular through hole 48 of the rubber elastic body 46.
- the shaft portion 16 has both end surfaces 50a, 50b of a single plate-like member constituting the arm main body portion 14 opposed to each other, and the opposite end surfaces 50a, 50b are mutually opposite.
- An urging portion 52 that is abutted and brought into contact with each other by bending is provided.
- the urging portion 52 is provided on a surface in the vehicle vertical downward direction (a lower surface along the vehicle vertical direction) among the four surfaces of the shaft portion 16 formed in a rectangular cross section. A method for manufacturing the urging unit 52 will be described later.
- the one end surface 50a of the plate-like member constituting the urging portion 52 is provided with a recess 54 that is recessed along the left-right direction (vehicle width direction), and the plate-like member that contacts the one end surface 50a is provided.
- the other end surface 50 b is provided with a convex portion 56 that protrudes in correspondence with the concave shape of the concave portion 54.
- the one end surface 50 a and the other end surface are abutted with each other by fitting the concave portion 54 and the convex portion 56 to each other. 50b can be prevented from moving and shifting in the axial direction, and the rigidity and strength of the shaft portion 16 can be improved.
- the lower arm 12 to which the suspension arm mounting structure according to the present embodiment is applied is basically configured as described above. Next, the function and effect will be described.
- the urging portion 52 can be provided for the shaft portion 16.
- the spring back is slightly deformed when the jig (tool) is separated from the material. The phenomenon that returns.
- FIGS. 7A and 7B are schematic views showing a first example for forming an urging portion.
- FIG. 7A after the plate-like member 59 is formed into a substantially rectangular cross section by bending, the outside of the vertical portions 14b facing each other is separated from each other by a jig or the like. A pressure is applied in the direction (arrow direction), and the both ends of the plate-like member 59 are deformed so as to spread. Subsequently, when the jig is removed from the state of FIG. 7A and the application of the applied pressure to the lower portion of the vertical portion 14b is released, both end surfaces 50a, as shown in FIG.
- a biasing force (see an arrow) that biases 50b in the direction of closing each other is generated to form a biasing portion 52.
- an urging force generating portion 53 is provided at a base portion on the upper side of the vertical portion 14b facing each other, and the urging force generating portion 53 is a portion that presses both end surfaces 50a and 50b to generate an urging force against the urging portion 52. It is done.
- FIGS. 8A and 8B are schematic views showing a second example for forming an urging portion.
- the substantially central portions of the vertical portions 14b facing each other are brought close to each other with a jig or the like. Pressing inward (in the direction of the arrow), the vertical portion 14b is deformed so as to be bent inward with the substantially central portion as a base point. Subsequently, when the jig is removed from the state of FIG. 8 (a) and the application of the pressing force to the substantially central portion of the vertical portion 14b is released, the vertical movement is caused by the action of the spring back as shown in FIG. 8 (b).
- the central portion of the portion 14b returns slightly outward, and a biasing force (see arrow) that biases both end surfaces 50a and 50b in the direction of closing each other is generated to form the biasing portion 52.
- An urging force generating portion 53 that is a portion that presses both end surfaces 50a and 50b to generate an urging force against the urging portion 52 is provided at a substantially central portion of the vertical portion 14b facing each other.
- the plate-like member 59 is deformed by applying a lateral pressure (arrow direction) to the plate-like member 59.
- the present invention is not limited to this.
- the plate member 59 is deformed by applying a pressing force in the vertical direction (vertical direction, a direction perpendicular to the arrow) to the plate member 59, as shown in FIGS. 7B and 8B.
- the urging portion 52 to be formed may be formed. This also applies to the specific examples shown below.
- FIGS. 9A and 9B are schematic views showing the necessary conditions for forming the urging portion with respect to the shaft portion using the flange portion provided by bending the plate-like member.
- the shaft member 16 having a closed cross section is formed by bending the plate member 59, for example, as shown in FIG. 9A, the base portion 62 of the plate member 59 is bent at a predetermined angle.
- Flange portions 60a and 60b that are inclined to face each other are formed. In this case, as shown in FIG.
- FIG. 10A is a schematic diagram of a shaft portion having a closed section with a substantially trapezoidal cross section
- FIG. 10B is a shaft portion having a closed section with a substantially constant lateral width between the upper side and the lower side
- FIGS. 10C and 10D are schematic views of a shaft part having a closed cross section of a curved surface part.
- an urging force generating portion 53 is provided on the lower end side of the side portions 64 facing each other, and the urging force generating portion 53 applies an urging force.
- a biasing portion 52 is provided in which both end faces 50a and 50b are pressed against each other by a force.
- the urging force generating portion 53 is provided at a substantially central portion of the side portions 64 facing each other.
- both end surfaces 50a and 50b which are abutted against each other and are in contact with each other are formed so as to be in surface contact with each other.
- the urging force generating portion 53 is provided at the base portion 62 that is a boundary portion between the side portion 64 and the curved surface portion 66 that face each other.
- the curved surface portion 66 provided on the upper side includes a substantially semicircular shape or a curved shape.
- the shaft portion 16 extending from the arm main body portion 14 toward the vehicle front-rear direction that is, the shaft portion 16 having a cylindrical or closed cross-sectional shape is formed by bending as described above.
- a front bush 24 disposed between the arm main body 14 and the vehicle body side and having an axis in the vehicle front-rear direction is mounted in the support holes 26 of the pair of support pieces 28 provided in the arm main body 14.
- the shaft portion 16 is press-fitted or fitted into a through-hole 48 having a rectangular cross section of the rubber elastic body 46 of the rear bushing 42 disposed between the arm main body portion 14 and the vehicle body side and having a shaft in the vehicle longitudinal direction. (See FIG. 5).
- the rear bushing 42 can be easily positioned using the separation distance R from the end surface of the front bushing 24 (rubber elastic body 38) shown in FIG. Note that the rear bush 42 may be mounted before the front bush 24.
- the manufacturing cost can be reduced, the weight can be reduced, and good bush performance can be obtained.
- the operation of the lower arm 12 will be described.
- vibration from the road surface, a thrust load, or a force in the vehicle front-rear direction acts on the wheel.
- a force in the vehicle front-rear direction acts on the wheel.
- the lower arm 12 is rotated about the axis L (see FIG. 1) by the vibration, push-up load and force in the vehicle front-rear direction, the wheel swings up and down with respect to the vehicle body, and the wheel moves in the vehicle front-rear direction. Displace.
- the lower arm 12 rotates about the axis L by a roll or the like during cornering of the vehicle.
- the vibration, push-up load, and vehicle longitudinal force transmitted to the lower arm 12 in this way are disposed in the front bush 24 and the rear mounting portion 20 disposed in the front mounting portion 18 of the arm main body portion 14. It acts on the rear bush 42.
- the rubber elastic body 38 is elastically deformed by a shaft (not shown) fixed to the vehicle body side, so that vibration, push-up load and force in the vehicle front-rear direction are absorbed (buffered).
- the rear bush 42 elastically deforms the rubber elastic body 46 into which the shaft portion 16 provided at the rear end portion in the vehicle front-rear direction of the arm main body portion 14 is press-fitted or fitted, thereby vibrating, pushing-up load, and the front-rear direction. Force is absorbed (buffered).
- the elastic elastic body 38 of the front bush 24 and the elastic rubber body 46 of the rear bush 42 are elastically deformed, so that vibration, thrust load, and force energy in the vehicle front-rear direction are absorbed.
- vibration, push-up load, and vehicle longitudinal force are buffered, and the riding comfort of the vehicle is improved.
- both end surfaces 50a and 50b of the plate-like member 59 constituting the shaft portion 16 having a cylindrical or closed cross-section have a biasing portion 52 that biases and abuts so as to press each other.
- the work of bonding or welding the both end faces 50a, 50b is not required, and the rigidity of the shaft portion 16 can be increased.
- both end surfaces 50a and 50b are in contact with each other while being biased to each other, so that the contact portions of both end surfaces 50a and 50b can be prevented from shifting.
- the manufacturing process can be simplified to reduce the manufacturing cost, and the weight can be reduced.
- predetermined rigidity and strength can be ensured, and these manufacturing costs, weight reduction, simplification of workability, and various elements of rigidity and strength can be harmonized and compatible.
- the shaft portion 16 is configured by using the reverse flange portion 14 c that contributes to the rigidity improvement of the arm main body portion 14, so that the shaft from the arm main body portion 14 is A closed cross section can be formed continuously up to the portion 16, and rigidity between the arm main body portion 14 and the shaft portion 16 (transition portion) can be ensured.
- the end surfaces 50a and 50b of the reverse flange portion 14c gradually approach and abut on the shaft portion 16 from the arm main body portion 14 toward the shaft portion 16.
- the both end surfaces 50 a and 50 b of the plate-like member 59 constituting the shaft portion 16 are in contact with each other between the concave portion 54 and the convex portion 56.
- the concave portion 54 and the convex portion 56 are fitted with each other through the provided clearance 58.
- both end surfaces 50a are axially provided. , 50b can be reliably prevented from shifting.
- the rubber elastic body (elastic member) 46 of the rear bush 42 is directly formed by the shaft portion 16 of the arm main body portion 14 constituted by the plate-like member 59, that is, the shaft portion 16 having a closed cross section. Can be elastically supported. For this reason, the shaft direction which supports an elastic member becomes unnecessary by arrange
- the shaft portion 16 is press-fitted or fitted into the through hole 48 of the rubber elastic body 46 so that the shaft portion 16 is used in a twisting direction with respect to the rubber elastic body 46 (FIG. 4B).
- the rubber bushing is not deformed in the twisting direction, and good bushing characteristics can be obtained.
- the urging portion 52 is provided on the surface of the shaft portion 16 formed in a rectangular cross section in the vehicle vertical downward direction (the lower surface along the vehicle vertical direction) (FIG. 6A). )reference). For this reason, in the present embodiment, for example, even when a force (lateral force) in the vehicle width direction is input from the wheel side, only the force for closing the urging unit 52 is input. It is possible to prevent the biasing portion 52 from opening or shifting in the axial direction. As a result, in the present embodiment, the strength and rigidity of the shaft portion 16 can be improved, and the two end surfaces 50a and 50b of the plate-like member 59 that are in contact with each other are prevented from contacting each other and generating abnormal noise. be able to.
- the cross section perpendicular to the axial direction of the shaft portion 16 is a rectangular shape having four corner portions, Further, by making the cross section orthogonal to the axial direction of the through hole 48 of the rubber elastic body 46 into a shape corresponding to the rectangular shape of the shaft portion 16, for example, processing is easier compared to the case where the cross sectional shape is circular. Thus, the processing cost can be reduced.
- both the front attachment portion 18 and the rear attachment portion 20 attached to the vehicle body side can be provided integrally with the arm main body portion 14, for example, a rubber elastic body with respect to the shaft portion 16.
- the member for attachment becomes unnecessary separately, and it can reduce a number of parts and can reduce manufacturing cost. Further, it is not necessary to weld a mounting member or the like, so that the welding allowance can be reduced, and the weight of the entire lower arm 12 can be reduced. Furthermore, since welding is not required and the manufacturing process is simplified, the processing cost can be reduced.
- the lower arm 12a according to another embodiment shown in FIG.
- a shaft portion 16d extending from the arm main body portion 14 toward the vehicle body in the vehicle width direction may be provided.
- a rubber elastic body 46 is press-fitted or fitted into the shaft portion 16d.
- illustration of a bracket that is externally fitted to the rubber elastic body 46 and attached to the vehicle body side is omitted.
Abstract
Description
本発明の主たる目的は、所定の剛性・強度を確保することが可能なサスペンションアーム取付構造を提供することにある。
また、凹部と凸部とを嵌め合い状態とすることで、車輪から力が入力されたとき、軸方向に両端部がずれるのを確実に防止することができる。
図1は、本発明の実施形態に係るサスペンションアーム取付構造が適用されたロアアームの斜視図、図2(a)は、図1のロアアームを構成するアーム本体部の斜視図、図2(b)は、図2(a)のB-B線に沿った縦断面図、図2(c)は、図2(a)のC-C線に沿った縦断面図、図2(d)は、図2(a)のD-D線に沿った縦断面図、図3は、図2(a)に示すアーム本体部の平面図である。なお、各図中に矢印で示される、「前後」は、車両の前後方向を示し、「上下」は、車両の上下方向(鉛直方向)を示し、「左右」は、運転席から見た左右方向(車幅方向)を示している。
図7(a)、(b)は、付勢部を形成する第1例を示す模式図である。
図7(a)に示されるように、板状部材59が曲げ加工によって断面略矩形状に形成された後、相互に対向する鉛直部14bの下部に対し、治具等で相互に離間する外方向(矢印方向)に加圧力を付与し、板状部材59の両端面を広げるように変形させる。続いて、図7(a)の状態から治具を外して鉛直部14bの下部に対する加圧力の付与を解除すると、図7(b)に示されるように、スプリングバックの作用により両端面50a、50bを相互に閉じる方向に付勢する付勢力(矢印参照)が発生して付勢部52が形成される。なお、相互に対向する鉛直部14bの上部側の付け根部位には、両端面50a、50bを相互に押圧し付勢部52に対して付勢力を発生させる箇所である付勢力発生部53が設けられる。
図8(a)に示されるように、板状部材59が曲げ加工によって断面略矩形状に形成された後、相互に対向する鉛直部14bの略中央部を、治具等で相互に接近する内方向(矢印方向)に押圧し、略中央部を基点として内側に向かって屈曲するように鉛直部14bを変形させる。続いて、図8(a)の状態から治具を外して鉛直部14bの略中央部に対する押圧力の付与を解除すると、図8(b)に示されるように、スプリングバックの作用により、鉛直部14bの略中央部が外方向に向かって少しだけ戻ると共に、両端面50a、50bを相互に閉じる方向に付勢する付勢力(矢印参照)が発生して付勢部52が形成される。なお、相互に対向する鉛直部14bの略中央部には、両端面50a、50bを相互に押圧し付勢部52に対して付勢力を発生させる箇所である付勢力発生部53が設けられる。第1例及び第2例に示す具体例では、板状部材59に対し横方向の加圧力(矢印方向)を付与して板状部材59を変形させているが、これに限定されるものではなく、例えば、板状部材59に対し縦方向(上下方向、矢印と直交する方向)の加圧力を付与して板状部材59を変形させ、図7(b)及び図8(b)に示される付勢部52を形成するようにしてもよい。この点は、以下に示す具体例においても同様である。
板状部材59に対して曲げ加工を施して閉断面を有する軸部16を形成する際、例えば、図9(a)に示されるように、板状部材59の付け根部62を所定角度折り曲げて相互に傾斜して対向するフランジ部60a、60bを形成する。この場合、図9(b)に示されるように、板状部材59の付け根部62から両端面50a、50bまでの長さをフランジ部60a、60bの長さ(S1、S2)とした場合、二つのフランジ部60a、60bの長さの合計(S1+S2)が、両フランジ部60a、60bの付け根部62間の横幅(X1)よりも大きくなるように設定する((S1+S2)>X1)。なお、両フランジ部60a、60bの長さ(S1、S2)は、S1=S2の関係であってもよいし、又は、S1≠S2の関係であってもよい。
先ず、上記したような曲げ加工によって、アーム本体部14から車両前後方向に向かって延出する軸部16、すなわち筒状又は閉断面状の軸部16を形成する。続いて、アーム本体部14と車体側との間に配置され車両前後方向に軸を有する前方ブッシュ24を、アーム本体部14に設けられた一対の支持片28の支持孔26内に装着する。
例えば、車両の車輪が凹凸を有する路面を走行したり、段差部に乗り上げたりした場合、路面からの振動、突き上げ荷重や、車両前後方向の力が車輪に作用する。また、車両の減速時に車輪が制動力を受けるため、車両前後方向の力が車輪に作用する。この振動、突き上げ荷重や車両前後方向の力によって、ロアアーム12が軸線L(図1参照)を中心として回動し、車輪が車体に対して上下方向に揺動すると共に、車輪が車両前後方向に変位する。さらに、車両のコーナリング時のロール等によって、ロアアーム12が軸線Lを中心として回動する。
12、12a ロアアーム(サスペンションアーム)
14 アーム本体部
14a 水平部
14b 鉛直部
14c リバースフランジ部
16、16a~16d 軸部
46 ゴム弾性体(弾性部材)
50a、50b 両端面(両端部)
52 付勢部
54 凹部
56 凸部
58 クリアランス
59 板状部材
L 軸線(揺動軸)
Claims (4)
- 車体側に対して車輪側を揺動自在に支持するサスペンションアームを取り付けるサスペンションアーム取付構造において、
前記車輪側と前記車体側との間に配置され、板状部材で構成されるアーム本体部と、
前記アーム本体部と前記車体側との間に設けられる弾性部材と、
前記アーム本体部から車両前後方向又は車幅方向に向かって延出され、前記弾性部材の内周側に圧入又は嵌合される筒状又は閉断面状の軸部と、
を備え、
前記軸部は、前記板状部材の両端部を相互に対向させ、前記対向する両端部が相互に押圧するように付勢して当接させる付勢部を有することを特徴とするサスペンションアーム取付構造。 - 前記アーム本体部は、車体へ取り付けた状態において略水平方向に延在する水平部と、
前記水平部の周縁を下向きに折り曲げた鉛直部と、
前記鉛直部の下縁を内向きに折り曲げたリバースフランジ部と、を備え、
前記軸部を構成する前記板状部材の両端部は、前記リバースフランジ部の対向する端部により構成されることを特徴とする請求項1に記載のサスペンションアーム取付構造。 - 前記リバースフランジ部は、相互に対向する端面を有し、
前記リバースフランジ部の端面は、前記アーム本体部から前記軸部に向かうにつれて徐々に接近し前記軸部で当接して相互に付勢するように設けられることを特徴とする請求項2に記載のサスペンションアーム取付構造。 - 前記対向する両端部を突き合わせて当接させた前記板状部材の一端部には凹部が形成され、前記板状部材の他端部には凸部が設けられ、
前記凹部と前記凸部とが相互に嵌め合わされていると共に、
前記凹部と前記凸部との間には、クリアランスが設けられることを特徴とする請求項1乃至3のいずれか1項に記載のサスペンションアーム取付構造。
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DE201211005385 DE112012005385T8 (de) | 2011-12-21 | 2012-12-18 | Aufhängungsarm-Montagestruktur |
US14/367,970 US9278595B2 (en) | 2011-12-21 | 2012-12-18 | Suspension arm mounting structure |
BR112014015255-1A BR112014015255B1 (pt) | 2011-12-21 | 2012-12-18 | Estrutura de montagem de braço de suspensão |
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CN104066602B (zh) | 2016-08-24 |
US9278595B2 (en) | 2016-03-08 |
BR112014015255A2 (pt) | 2021-05-25 |
DE112012005385T8 (de) | 2014-10-02 |
US20140361508A1 (en) | 2014-12-11 |
BR112014015255A8 (pt) | 2017-06-13 |
JP5905490B2 (ja) | 2016-04-20 |
DE112012005385T5 (de) | 2014-09-11 |
BR112014015255B1 (pt) | 2022-02-01 |
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