CN108688421B - Trailing arm for rear suspension - Google Patents
Trailing arm for rear suspension Download PDFInfo
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- CN108688421B CN108688421B CN201810223114.0A CN201810223114A CN108688421B CN 108688421 B CN108688421 B CN 108688421B CN 201810223114 A CN201810223114 A CN 201810223114A CN 108688421 B CN108688421 B CN 108688421B
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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
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Abstract
The invention provides a trailing arm for a rear suspension, wherein in an end plate (100) of a trailing arm (1) for a rear suspension, a mounting portion (130) comprises: a mounting surface (132) which is configured such that the entire mounting surface is a flat surface at an end portion on the outer side of the mounting portion (130); and 3 or more holes (150) that penetrate the attachment surface (132) in the width direction, extend within the end plate (100), and are arranged on the circumference of the Same Circle (SC) on the attachment surface (132), wherein the 2 nd contour (133) is the outer contour of the attachment surface (132), the 1 st contour (161) is the outer contour of a boundary portion (160) that forms the boundary between the insertion portion (110) and the attachment portion (130), the attachment surface (132) has a plurality of bulging portions (134) in which the 2 nd contour (133) bulges in the radial direction of the circle (SC) than the 1 st contour (161), and 1 of the holes (150) is arranged in correspondence with each of the plurality of bulging portions (134).
Description
Technical Field
The present invention relates to a trailing arm for a rear suspension, and more particularly to a trailing arm for a rear suspension used in a vehicle such as a four-wheel automobile.
Background
In recent years, in vehicles such as four-wheeled automobiles, the following situations are increasing: even for the same vehicle type, various layout conditions are set due to subtle differences in specifications thereof depending on different venues, different grades, and the like, and it is required to realize a structure suitable for various layout conditions for structural components of a suspension system of a vehicle. At the same time, even when various layout conditions are set in this way, the structure itself of the relevant components is required to be as versatile as possible.
Under the above circumstances, japanese patent application laid-open No. 2011-225114 relates to a suspension and discloses the following structure: the shape of the connecting portion of the wheel mounting member to the end portion of the axle member is set to a curved surface having a curvature larger than the diameter of the end portion of the axle member, so that even when one of the axle member and the wheel mounting member is different due to a difference in vehicle type or the like, the other is connected to the same member.
Disclosure of Invention
However, according to the studies of the present inventors, in the structure disclosed in japanese patent application laid-open No. 2011-225114, even when one of the axle member and the wheel mounting member is different, the other is connected to the same member, but this is only applicable to a difference in the inclination angle of the spindle that affects the toe-in and camber angles of the wheel, and in the case where the mounting dimensions are different, such as the mounting position of the wheel side member with respect to the coordinate system of the vehicle body, the structure that can be adapted to various mounting dimensions while making the main part of the structural member common is not disclosed, and there is no suggestion about the disclosure.
Further, according to the studies of the present inventors, in the mounting structure of the wheel-side member, since a plurality of fastening points are generally set, positions of the plurality of fastening points of the wheel-side member are different when the mounting dimension of the wheel-side member is different. Therefore, according to the studies of the present inventors, it is important to construct a novel structure that can be adapted to various mounting sizes while generalizing a main part of the structural member, particularly, also in consideration of the case where the positions of the plurality of fastening points of the wheel-side member are different.
That is, in the suspension system of a vehicle such as a four-wheel automobile, the following situation is present: it is desirable to achieve a novel structure capable of being adapted to a wide range of mounting sizes including a wide range of mounting points while generalizing the main portion of its structural components, which is also applicable to a trailing arm in a rear suspension.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a trailing arm for a rear suspension that can be adapted to vehicles having a plurality of specifications while allowing the main components of the trailing arm to be used in a common manner without unnecessarily increasing the size of an end plate.
In order to achieve the above object, a trailing arm for a rear suspension according to claim 1 of the present invention includes: a main body portion extending in a front-rear direction of a vehicle body; a vehicle body side support portion that is disposed in connection with the main body portion on one end side that is a front side of the vehicle body; and an insertion receiver connected to the body at the other end side, which is the rear side of the vehicle body, and opened outward in the width direction of the vehicle body, the end plate having: an insertion portion inserted into the insertion receiving portion; and a mounting portion that is disposed so as to be connected to the insertion portion on the outer side of the insertion portion, to which a wheel-side member is mounted, a boundary portion that constitutes a boundary between the insertion portion and the mounting portion being located at a position that coincides with a position of an outer receiving end portion that is an end portion of the insertion receiving portion on the outer side in the width direction, the mounting portion including: a mounting surface formed by forming an entire end portion of the mounting portion as a flat surface at the outer end portion; and 3 or more holes that penetrate the attachment surface in the width direction, extend in the end plate, and are arranged on the circumference of the same circle on the attachment surface, wherein an outer contour of the boundary portion is a 1 st contour, an outer contour of the attachment surface is a 2 nd contour, the attachment surface has a plurality of bulging portions that bulge out in the radial direction of the circle from the 2 nd contour than from the 1 st contour, and each 1 of the plurality of holes is arranged in correspondence with each 1 of the plurality of bulging portions.
In the trailing arm for a rear suspension according to claim 2 of the present invention, in addition to the configuration of claim 1, the main body portion includes a 1 st main body portion disposed on the outer side and a 2 nd main body portion disposed on the inner side in the width direction, and the 1 st main body portion and the 2 nd main body portion are connected to each other so as to form a closed cross section on a longitudinal section cut by a plane defined by the vertical direction and the width direction of the vehicle body, and the 1 st main body portion includes: a 1 st vertical wall portion; a 1 st upper wall portion connected to a portion of the 1 st vertical wall portion on an upper side of the vehicle body; and a 1 st lower wall portion connected to a portion of the 1 st vertical wall portion on a lower side of the vehicle body and facing the 1 st upper wall portion on the lower side, wherein the 2 nd main body portion includes: a 2 nd vertical wall portion that is opposed to the 1 st vertical wall portion in the width direction; a 2 nd upper wall portion connected to the upper portion of the 2 nd vertical wall portion; and a 2 nd lower wall portion connected to the lower portion of the 2 nd vertical wall portion and facing the 2 nd upper wall portion on the lower side, wherein the 1 st upper wall portion and the 2 nd upper wall portion are connected to each other to form a 1 st link portion, the 1 st lower wall portion and the 2 nd lower wall portion are connected to each other to form a 2 nd link portion, the insertion receiving portion has a 1 st bend portion and a 2 nd bend portion formed by bending the 1 st body portion and the 2 nd body portion outward, respectively, the 1 st body portion and the 2 nd body portion are integrally formed, and the 2 nd link portion is set on the rear side of the 1 st link portion in the insertion receiving portion.
In the trailing arm for a rear suspension according to claim 3 of the present invention, in addition to the configuration according to claim 2, the 1 st connecting portion is a welded portion at a portion where the 1 st upper wall portion and the 2 nd upper wall portion overlap each other, and the 2 nd connecting portion is a welded portion at a portion where the 1 st lower wall portion and the 2 nd lower wall portion overlap each other.
In the trailing arm for a rear suspension according to claim 4 of the present invention, in addition to the configuration according to claim 2 or 3, the 2 nd bent portion has a recessed portion provided in parallel with a deepest portion of the insertion receiving portion on an inner side of the vehicle body.
In the trailing arm for a rear suspension according to claim 5 of the present invention, in addition to the configuration according to any one of claims 1 to 4, the attachment surface is set to be an inclined surface inclined with respect to a plane defined by the front-rear direction and a vertical direction of the vehicle body.
According to the structure in the 1 st aspect of the present invention, on the end plate, the mounting portion has: a mounting surface formed by forming an entire end portion of the mounting portion as a flat surface at an outer end portion thereof; and 3 or more holes extending through the mounting surface in the width direction and extending in the end plate, and arranged on the circumference of the same circle on the mounting surface, the outer contour of the boundary portion constituting the boundary between the insertion portion and the mounting portion is the 1 st contour, the outer contour of the mounting surface is the 2 nd contour, the mounting surface has a plurality of bulging portions bulging in a radial direction of the circle in a 2 nd contour than in a 1 st contour, each 1 of the plurality of holes being provided corresponding to each 1 of the plurality of bulging portions, therefore, for a vehicle having a plurality of specifications different in tread width and the like, the specification difference can be supplemented with the structure of the end plate without unnecessarily increasing the size of the end plate, and therefore, a trailing arm for a rear suspension can be realized, the main components of the trailing arm can be easily made universal, and the amount of tightening around the tightening point for the wheel-side components can be ensured.
Further, according to the configuration of the 2 nd aspect of the present invention, in the body portion of the trailing arm, the 1 st upper wall portion and the 2 nd upper wall portion are connected to each other to form the 1 st link portion, the 1 st lower wall portion and the 2 nd lower wall portion are connected to each other to form the 2 nd link portion, the insertion receiving portion has the 1 st bent portion and the 2 nd bent portion formed by bending the 1 st body portion and the 2 nd body portion outward, respectively, the 1 st body portion and the 2 nd body portion are integrally formed, and the 2 nd link portion is set at a position on the rear side of the 1 st link portion in the insertion receiving portion, so that it is possible to improve the resistance against the external force applied to the body portion via the end plate or the like.
Further, according to the configuration of the 3 rd aspect of the present invention, the 1 st joint is a welded portion at a portion where the 1 st upper wall portion and the 2 nd upper wall portion overlap each other, and the 2 nd joint is a welded portion at a portion where the 1 st lower wall portion and the 2 nd lower wall portion overlap each other, so that the reliability of the connection using welding of each of the 1 st joint and the 2 nd joint can be improved.
Further, according to the configuration of the 4 th aspect of the present invention, since the 2 nd bent portion has the recessed portion provided in parallel with the deepest portion of the inside of the vehicle body in the insertion receiving portion, it is possible to improve the degree of freedom in arrangement of the peripheral members and to improve the resistance against the external force applied to the main body portion via the end plate or the like.
Also, according to the structure of the 5 th aspect of the invention, the mounting surface is set to an inclined surface inclined with respect to a plane defined by the front-rear direction and the up-down direction, and therefore, the degree of freedom in arrangement of peripheral components can be enhanced, and geometric characteristics exhibiting desired toe-in angle and camber angle can be statically applied to the rear suspension.
Drawings
Fig. 1 is a plan view showing the structure of a trailing arm in an embodiment of the present invention.
Fig. 2 is a side view showing the structure of the trailing arm in the present embodiment.
Fig. 3 is a rear view showing the structure of the trailing arm in the present embodiment.
Fig. 4A is a sectional view taken along line a-a in fig. 1.
Fig. 4B is a sectional view taken along line B-B in fig. 1.
Fig. 4C is a sectional view taken along line C-C in fig. 1.
Fig. 5A is a side view showing only the end plate of the trailing arm in the present embodiment.
Fig. 5B is a plan view showing only the end plate of the trailing arm in the present embodiment.
Fig. 5C is a rear view showing only the end plate of the trailing arm in the present embodiment.
Description of the reference symbols
1: a trailing arm; 10: a main body portion; 12: a vehicle body side support portion; 14: inserting the bearing part; 16: an opening part; 24: a 1 st connecting part; 26: a 2 nd connecting part; 30: 1 st main body part; 32: a 1 st vertical wall portion; 34: 1 st upper wall part; 36: 1 st lower wall part; 44. 46: an end portion; 45. 47: a cut-out portion; 50: a 2 nd main body part; 52: a 2 nd vertical wall portion; 54: the 2 nd upper wall part; 56: a 2 nd lower wall portion; 70: 1 st bending part; 80: a 2 nd bent portion; 82: a recess; 100: an end plate; 110: an insertion portion; 130: an installation part; 132: a mounting surface; 133: a 2 nd outer contour; 134: a bulging portion; 136: a middle portion; 150: a fastening hole; 160: a boundary portion (boundary line); 161: 1 st outer contour; 200: a collar member; SC: a circle; c1: a center; AP: a vertex; d: a vector; h: a central bore.
Detailed Description
Hereinafter, a trailing arm for a rear suspension according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the figure, the x-axis, y-axis, and z-axis constitute a 3-axis orthogonal coordinate system. For convenience of description, the x-axis direction corresponds to the front-rear direction of the vehicle body, the y-axis direction corresponds to the width direction of the vehicle body, and the z-axis direction corresponds to the vertical direction of the vehicle body.
Fig. 1 is a plan view showing the structure of a trailing arm in the present embodiment, fig. 2 is a side view showing the structure of a trailing arm in the present embodiment, and fig. 3 is a rear view showing the structure of a trailing arm in the present embodiment. Fig. 4A is a sectional view taken along line a-a in fig. 1, fig. 4B is a sectional view taken along line B-B in fig. 1, and fig. 4C is a sectional view taken along line C-C in fig. 1. Fig. 5A is a side view showing only the end plate of the trailing arm in the present embodiment, fig. 5B is a plan view showing only the end plate of the trailing arm in the present embodiment, and fig. 5C is a rear view showing only the end plate of the trailing arm in the present embodiment.
As shown in fig. 1 to 5C, the trailing arm 1 is a structural body of a suspension system on the rear side of the vehicle, and has a main body 10 extending in the front-rear direction and an end plate 100 attached to the main body 10. In the figure, the trailing arm 1 is shown as being disposed on the left side of the vehicle body, but a trailing arm having a structure in which the structure of the trailing arm 1 is reversed right and left is also disposed on the right side of the vehicle body.
Specifically, the main body portion 10 is typically a cylindrical structure in which a plurality of plate materials formed of a metal product such as an iron plate are combined into one body so as to form a closed cross-sectional structure, a vehicle body side support portion 12 is formed on one end side of the main body portion 10 on the front side, a collar member 200 is fixed to the vehicle body side support portion 12, a bush member, not shown, attached to a vehicle body is attached to the collar member 200, an insertion receiving portion 14 is formed on the other end side of the main body portion 10 on the rear side, the insertion receiving portion 14 opens outward, and the end plate 100 is inserted.
In detail, the body part 10 has a 1 st body part 30 disposed mainly on the outer side and a 2 nd body part 50 disposed mainly on the inner side, and the 1 st body part 30 and the 2 nd body part 50 are connected to each other so that a closed cross section is drawn on a longitudinal section cut by a plane defined by the up-down direction and the width direction.
The 1 st body 30 includes: the 1 st vertical wall portion 32; a 1 st upper wall portion 34 connected to an upper portion of the 1 st vertical wall portion 32; and a 1 st lower wall portion 36 connected to a lower side portion of the 1 st vertical wall portion 32 and facing the 1 st upper wall portion 34 on the lower side. The 2 nd main body 50 includes: a 2 nd vertical wall portion 52 that faces the 1 st vertical wall portion 32 in the width direction; a 2 nd upper wall portion 54 connected to an upper portion of the 2 nd vertical wall portion 52; and a 2 nd lower wall portion 56 connected to a lower portion of the 2 nd vertical wall portion 52 and facing the 2 nd upper wall portion 54 on the lower side.
Here, the 1 st upper wall portion 34 and the 2 nd upper wall portion 54 are connected to each other by welding such as arc welding to constitute the 1 st connecting portion 24, and the 1 st lower wall portion 36 and the 2 nd lower wall portion 56 are connected to each other by welding such as arc welding to constitute the 2 nd connecting portion 26. From the viewpoint of improving the reliability of the connection of the 1 st upper wall portion 34 and the 2 nd upper wall portion 54, it is preferable that the connection portions 24 and 26 are welds at portions where the 1 st upper wall portion 34 and the 2 nd upper wall portion 54 overlap each other. Likewise, from the viewpoint of improving the reliability of the connection of the 1 st lower wall portion 36 and the 2 nd lower wall portion 56, it is preferable that the connection portions 24 and 26 are welds at portions where the 1 st lower wall portion 36 and the 2 nd lower wall portion 56 overlap each other. Also, from the viewpoint of improving the resistance against an external force applied to the main body portion 10 via the end plate 100 or the like, the connecting portions 24 and 26 preferably have a structure in which: the 2 nd upper wall portion 54 is overlapped on the 1 st upper wall portion 34, and the 2 nd lower wall portion 56 is overlapped under the 1 st lower wall portion 36. Typically, the connecting portions 24 and 26 are vertically overlapped with each other in the main body 10.
The insertion receiving portion 14 includes a 1 st curved portion 70 and a 2 nd curved portion 80 that are formed by outwardly curving the 1 st body portion 30 and the 2 nd body portion 50, respectively, and extend in the width direction, and the 1 st body portion 30 and the 2 nd body portion 50 are integrally formed. The size of the vertical cross section of the insertion receiving portion 14 cut by the plane defined by the vertical direction and the front-rear direction may be set to be equal to the size of the opening portion 16 opened at the outer end portion (outer receiving end portion) thereof in the entire width direction, or may be gradually larger than the size of the opening portion 16 as going from the opening portion 16 to the inside. In order to improve the resistance to external force applied to the body 10 via the end plate 100 and the like, it is preferable that the 2 nd connecting portion 26, which is a connecting portion between the 1 st lower wall portion 36 and the 2 nd lower wall portion 56, is set in the insertion receiving portion 14 at a position rearward of the 1 st connecting portion 24, which is a connecting portion between the 1 st upper wall portion 34 and the 2 nd upper wall portion 54. Further, typically, from the viewpoint of improving the degree of freedom in the arrangement of brake related components such as a brake drum, or a brake rotor and a caliper, and improving the resistance to external force applied to the main body portion 10 via the end plate 100 and the like, it is preferable that the 2 nd bent portion 80 has a recessed portion 82, and the recessed portion 82 is a portion in which the 2 nd bent portion 80 is recessed so as to be connected to the insertion receiving portion 14 at a position juxtaposed with respect to the innermost portion inside the insertion receiving portion 14. Further, from the viewpoint of further facilitating positioning of the end plate 100 with respect to the body portion 10 and improving the spreading ability of the paint, it is preferable that the end portions 44 and 46 on the opening portion 16 side at the 1 st connection portion 24 and the 2 nd connection portion 26 have cutout portions 45 and 47 in which a part of them is cut out.
The end plate 100 is typically a plate-shaped structure formed by molding a metal plate such as an iron plate, and the end plate 100 includes: an insertion portion 110 inserted into the insertion receiver 14 and located inside the insertion receiver 14; a mounting portion 130 that is connected to the insertion portion 110 outside the insertion portion 110 and is located outside the insertion receiving portion 14, and to which mounting portion 130 a wheel-side component such as a bearing assembly is mounted; and a plurality of fastening holes 150 opened on an end surface of the outer side of the mounting part 130 and extending toward the inner side of the mounting part 130. The position of the boundary 160 constituting the boundary between the insertion portion 110 and the mounting portion 130 is set to coincide with the position of the opening 16 as the outer receiving end portion of the insertion receiving portion 14, and the end plate 100 is fixed to the insertion receiving portion 14 along the boundary 160 by welding such as arc welding. Also, from the functional viewpoint of the end plate 100, the boundary portion 160 does not need to be understood as a portion having a length in the width direction, but a boundary line that distinguishes the insertion portion 110 and the mounting portion 130 connected to each other.
The length of the insertion portion 110 in the width direction is set to a predetermined length so that a required insertion amount with respect to the insertion receiving portion 14 can be obtained. The dimension of the longitudinal section of the insertion portion 110 cut by the plane defined by the vertical direction and the front-rear direction is preferably set to be equal to the dimension of the opening portion 16 of the insertion receiving portion 14 in the entire width direction from the viewpoint of easily forming the insertion portion, but may be set to be gradually smaller from the outside toward the inside from the viewpoint of improving the insertion property with respect to the insertion receiving portion 14.
The mounting portion 130 has a mounting surface 132 at an end portion on an outer side thereof, the mounting surface 132 being formed by forming an entirety of the end portion in parallel with a plane defined by the up-down direction and the front-rear direction. A wheel-side member such as a bearing assembly is attached to the attachment surface 132 by fastening a fastening member such as a bolt, not shown, to the plurality of fastening holes 150. In consideration of geometrical characteristics such as a toe angle and a camber angle of the rear suspension to which the trailing arm 1 is applied, the mounting surface 132 may be an inclined surface inclined with respect to a plane defined by the up-down direction and the front-rear direction.
Although the figure shows an example in which 4 fastening holes 150 are provided for the plurality of fastening holes 150, typically, 3 or more fastening holes 150 need to be provided in order to improve the reliability of the fastening state of the wheel-side member such as the bearing assembly. When 3 fastening holes 150 are provided in the end plate 100, they are arranged such that their centers CA, CB, and CC are on the same circle SC on the mounting surface 132, and therefore, it is sufficient to provide 3 fastening holes 150 as follows: the circle SC is defined on the mounting surface 132 while a contact area required for the head of the fastening member such as a bolt with respect to the mounting surface 132 is secured, and a required span between the centers of the fastening holes 150 adjacent to each other on the circle SC (between the center CA and the center CB, and between the center CB and the center CC) is secured. The centers of the fastening holes 150 of the 4 th and subsequent fastening holes 150 do not necessarily have to be arranged on the circle SC, and the fastening holes 150 of the 4 th and subsequent fastening holes 150 may be arranged as follows: a desired span is secured between their centers and the centers of the fastening holes 150 adjacent to them. For example, in the illustrated example, the 4 th fastening hole 150 may be provided as follows: the required span is secured between the center CD of the 4 th fastening hole 150 and the centers of the fastening holes 150 adjacent thereto (between the center CD and the center CA, between the center CD and the center CC). The plurality of fastening holes 150 may have a length that can secure a necessary fastening length, and may extend in the width direction in the mounting portion 130, for example, or may be a plurality of through holes that penetrate the insertion portion 110 and the mounting portion 130 in the width direction, in order to further improve workability thereof and increase the fastening length thereof.
Here, in the case where the offset between the arrangement position of the wheel-side member such as the bearing assembly and the arrangement position of the insertion receiver 14 on the x-z plane is large relative to the size of the mounting surface 132 in the arrangement of the component parts corresponding to the specifications of the vehicle and the like, and the configuration of the main body 10 is to be avoided from being changed, it is considered that: if the insertion portion is extended directly outward to form the mounting portion 130, the mounting portion 130 and the like are not provided with the plurality of fastening holes 150 in an adequate amount, and the plurality of fastening holes 150 cannot be provided appropriately. Therefore, in order to secure an arrangement amount necessary for arranging the plurality of fastening holes 150 without changing the structure of the body 10, in the end plate 100, the shape itself of the outer contour (2 nd outer contour) 133 of the mounting surface 132 is the same as the shape of the 1 st outer contour 161 from the viewpoint of improving the formability of the end plate 100 with respect to the outer contour (1 st outer contour) 161 of the boundary portion 160 constituting the boundary between the insertion portion 110 and the mounting portion 130, that is, typically, the 1 st outer contour 161 which is a contour appearing as the boundary portion 160, and is set to a positional relationship in which the 2 nd outer contour 133 is displaced on the x-z plane with respect to the 1 st outer contour 161. That is, the mounting surface 132 is set to have a positional relationship in which the 2 nd outer contour 133 is offset in the x-z plane with respect to the 1 st outer contour 161 by typically rotating the 2 nd outer contour 133 with respect to the 1 st outer contour 161 so as to have a plurality of bulging portions 134 bulging in the radial direction of the circle SC with respect to the 1 st outer contour 133. In this case, for convenience in molding, it is preferable that the 2 nd outer contour 133 be offset by being rotated relative to the 1 st outer contour 161 in the x-z plane in a state where the centers of the figures are aligned, thereby forming the plurality of expanded portions 134. Although the circle SC is defined in the 2 nd outer contour 133, the required span and the required contact area for the 3 fastening holes 150 each having the center on the circle SC are secured at the time of defining the circle SC, and the 4 th and subsequent fastening holes 150 are also arranged as necessary so as to satisfy their required arrangement conditions. Meanwhile, each 1 of the plurality of fastening holes 150 is disposed corresponding to each 1 of the plurality of swelling portions 134. Specifically, first, with respect to the absolute value of the vector d starting from the center C1 of the circle SC and ending at the 2 nd outer contour 133, the absolute value takes the minimum value dmm when the position of the 2 nd outer contour 133 between the adjacent bulged parts 134 comes to an end point, and the absolute value takes the maximum value dma when the position of the 2 nd outer contour 133 of the bulged part 134 projecting to the outermost side in the radial direction of the circle SC comes to an end point, but the position of the 2 nd outer contour 133 of the bulged part 134 forming the maximum value dma is taken as the apex AP of the bulged part 134. At this time, the arrangement of each of the plurality of fastening holes 150 corresponding to each of the plurality of bulging portions 134 means that the center of the fastening hole 150 is positioned on or outside the circle SC, that is, for example, the centers CA, CB, and CC of the fastening holes 150 are positioned on the circle SC, the center CD of the fastening hole 150 is positioned outside the circle SC, and typically, all of the fastening holes 150 having a circular shape fall within the range of the inner side of the 2 nd outer contour 133, and further, all of the vectors d (dma) starting from the center C1 of the circle SC and ending at the apex AP correspondingly pass through the typically circular fastening hole 150. In addition, in the mounting portion 130, the shape of the intermediate portion 136 connecting the 1 st outer contour 161 and the 2 nd outer contour 133 is specified so that the plurality of fastening holes 150 securing a required fastening length are not exposed. Further, it is preferable that the intermediate portion 136 have a shape smoothly connecting the 1 st outer contour 161 and the 2 nd outer contour 133 to avoid unnecessary concentration of stress due to an external force applied to the end plate 100. The end plate 100 may be provided with a hole H that penetrates the insertion portion 110 and the attachment portion 130 in the width direction, with an axis that passes through the center C1 of the circle SC and extends in the width direction as a central axis.
According to the above configuration of the present embodiment, the end plate 100 includes the mounting portion 130 having: a mounting surface 132 formed by flattening the entire outer end of the mounting portion 130; and 3 or more holes 150, the holes 150 penetrating the attachment surface 132 in the width direction, extending in the end plate 100, and being arranged on the circumference of the same circle SC on the attachment surface 132, the outer contour of the attachment surface 132 being the 2 nd contour 133, the outer contour of the boundary 160 constituting the boundary between the insertion portion 110 and the attachment portion 130 being the 1 st contour 161, the attachment surface 132 having a plurality of bulging portions 134 in the radial direction of the circle SC in which the 2 nd contour 133 bulges out than the 1 st contour 161, each 1 of the plurality of fastening holes 150 being arranged corresponding to each 1 of the plurality of bulging portions 134, so that the trailing arm 1 for a rear suspension can be realized: the present invention provides a trailing arm for vehicles having a plurality of specifications, which can be adapted to various mounting sizes including various fastening points while allowing the main portion of the trailing arm to be made common without unnecessarily increasing the size of the end plate.
It is to be understood that the shape, arrangement, number, and the like of the components of the present invention are not limited to the above-described embodiments, and that the components may be appropriately modified without departing from the spirit of the present invention, such as by appropriately replacing the components with components having equivalent functions and effects.
Industrial applicability
As described above, according to the present invention, it is possible to provide a trailing arm for a rear suspension that has a simple structure, can be adapted to vehicles having a plurality of specifications while making the main components of the trailing arm common without unnecessarily increasing the size of the end plates, and therefore, is expected to be widely applicable to the field of trailing arms for rear suspensions of vehicles such as four-wheel automobiles due to its common general nature.
Claims (5)
1. A trailing arm for a rear suspension has trailing arm members and end plates,
the trailing arm component has: a main body portion extending in a front-rear direction of a vehicle body; a vehicle body side support portion that is disposed in connection with the main body portion on one end side that is a front side of the vehicle body; and an insertion receiving portion that is disposed to be connected to the body portion on the other end side that is the rear side of the vehicle body and that opens outward in the width direction of the vehicle body,
the end plate has: an insertion portion that is located inside the insertion receiver in a state of being inserted into the insertion receiver; and a mounting portion that is disposed in connection with the insertion portion on the outer side of the insertion portion and to which the wheel-side member is mounted,
a boundary portion constituting a boundary between the insertion portion and the mounting portion is located at a position coinciding, in the width direction, with a position of an outer receiving end portion of the insertion receiving portion, which is the outer end portion, and the end plate is fixedly provided to the insertion receiving portion along the boundary portion by welding,
the mounting portion has: a mounting surface formed by forming an entire end portion of the mounting portion as a flat surface at the outer end portion; and 3 or more holes that penetrate the mounting surface in the width direction, extend in the end plate, and are arranged on the circumference of the same circle on the mounting surface,
the outer contour of the boundary portion is a 1 st contour, the outer contour of the mounting surface is a 2 nd contour, the mounting surface has a plurality of bulging portions bulging in the radial direction of the circle compared with the 2 nd contour, and each 1 of the plurality of holes is arranged corresponding to each 1 of the plurality of bulging portions.
2. The trailing arm for a rear suspension according to claim 1,
the body portion has a 1 st body portion arranged on the outer side and a 2 nd body portion arranged on the inner side in the width direction, and the 1 st body portion and the 2 nd body portion are connected to each other so as to constitute a closed cross section on a longitudinal section cut by a plane defined by the vertical direction and the width direction of the vehicle body,
the 1 st body portion includes: a 1 st vertical wall portion; a 1 st upper wall portion connected to a portion of the 1 st vertical wall portion on an upper side of the vehicle body; and a 1 st lower wall portion connected to a portion of the 1 st vertical wall portion on a lower side of the vehicle body, and facing the 1 st upper wall portion on the lower side, wherein the 2 nd main body portion includes: a 2 nd vertical wall portion that is opposed to the 1 st vertical wall portion in the width direction; a 2 nd upper wall portion connected to the upper portion of the 2 nd vertical wall portion; and a 2 nd lower wall portion connected to the lower side portion of the 2 nd vertical wall portion and opposed to the 2 nd upper wall portion on the lower side,
the 1 st upper wall portion and the 2 nd upper wall portion are connected to each other to form a 1 st joint portion, and the 1 st lower wall portion and the 2 nd lower wall portion are connected to each other to form a 2 nd joint portion,
the insertion receiving portion has a 1 st curved portion and a 2 nd curved portion formed by curving the 1 st body portion and the 2 nd body portion outward, respectively, the 1 st body portion and the 2 nd body portion are integrally formed,
the 2 nd connecting part is set at the insertion receiving part at a position closer to the rear side than the 1 st connecting part.
3. The trailing arm for a rear suspension according to claim 2,
the 1 st connecting portion is a welded portion at a portion where the 1 st upper wall portion and the 2 nd upper wall portion overlap each other, and the 2 nd connecting portion is a welded portion at a portion where the 1 st lower wall portion and the 2 nd lower wall portion overlap each other.
4. Trailing arm for rear suspensions according to claim 2 or 3,
the 2 nd bent portion has a recessed portion provided in parallel with a deepest portion of the insertion receiving portion on the inner side of the vehicle body.
5. Trailing arm for a rear suspension according to any one of claims 1 to 3,
the mounting surface is set to an inclined surface inclined with respect to a plane defined by the front-rear direction and a vertical direction of the vehicle body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-074506 | 2017-04-04 | ||
| JP2017074506A JP6849510B2 (en) | 2017-04-04 | 2017-04-04 | Trailing arm for rear suspension |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108688421A CN108688421A (en) | 2018-10-23 |
| CN108688421B true CN108688421B (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810223114.0A Active CN108688421B (en) | 2017-04-04 | 2018-03-19 | Trailing arm for rear suspension |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6849510B2 (en) |
| CN (1) | CN108688421B (en) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4093548B2 (en) * | 2002-07-09 | 2008-06-04 | 株式会社エフテック | Torsion beam suspension |
| KR20060037647A (en) * | 2004-10-28 | 2006-05-03 | (주) 동희산업 | A torsion beam type suspension system in automobile and method manufacturing said system |
| JP2006232180A (en) * | 2005-02-25 | 2006-09-07 | F Tech:Kk | Torsion beam type suspension |
| JP2007153254A (en) * | 2005-12-08 | 2007-06-21 | Toyota Motor Corp | Trailing arm type suspension structure |
| JP2008195155A (en) * | 2007-02-09 | 2008-08-28 | Futaba Industrial Co Ltd | Torsion beam suspension |
| JP4301307B2 (en) * | 2007-03-01 | 2009-07-22 | トヨタ自動車株式会社 | Torsion beam suspension |
| JP5111121B2 (en) * | 2008-01-10 | 2012-12-26 | 本田技研工業株式会社 | Suspension structure |
| DE102009010098B4 (en) * | 2009-02-24 | 2013-09-05 | Benteler Automobiltechnik Gmbh | Twist-beam axle and method for its production |
| EP2327573B1 (en) * | 2009-11-18 | 2012-10-17 | Fiat Group Automobiles S.p.A. | Modular monolithic packet-shaped trailing arm for rear twist-beam axle with applications on front-wheel or rear-wheel drives |
| CN202413328U (en) * | 2011-12-14 | 2012-09-05 | 上海汇众汽车制造有限公司 | Back dragging arm with punching and welding composite structure |
| EP2727753A1 (en) * | 2012-10-31 | 2014-05-07 | Jose Ramon Mosteiro Goyoaga | Suspension for an automotive vehicle |
| JP6046557B2 (en) * | 2013-05-15 | 2016-12-14 | フタバ産業株式会社 | Torsion beam suspension |
| JP6347990B2 (en) * | 2014-05-30 | 2018-06-27 | 三菱自動車工業株式会社 | Torsion beam suspension |
| CN205930086U (en) * | 2016-08-05 | 2017-02-08 | 浙江天瑞汽车零部件有限公司 | Torsion beam behind car |
-
2017
- 2017-04-04 JP JP2017074506A patent/JP6849510B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6849510B2 (en) | 2021-03-24 |
| CN108688421A (en) | 2018-10-23 |
| JP2018176816A (en) | 2018-11-15 |
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