Automobile undercarriage component
First Claim
Patent Images
1. An automobile undercarriage component comprising:
- an elongated arm comprising a web; and
a rib connected to the web in a direction parallel to the plane of the web and transverse to the direction of elongation of the web, the rib having an inner wall surface extending from the rib to terminate at a leading end which is the end of the rib farthest from the web in a direction perpendicular to the plane of the web;
wherein the rib includes a first section and a second section which are respectively arranged along the direction of elongation of the arm, wherein the second section is located adjacent a distal end of the arm in the direction of elongation and is arranged closer to the distal end than is the first section, a leading end of the second section having a width in the direction parallel to the plane of the web and transverse to the direction of elongation of the arm which is narrower than the width of a leading end of the first section, as an inner wall surface is disposed closer to an opposing outer wall surface in the second section as compared to the first section;
wherein the first section includes a first inner wall surface formed and a first outer wall surface opposing the first inner wall surface, the first inner wall surface having an inclination angle θ
of θ
a (°
), an angular portion formed on the leading end of the first inner wall surface having a curvature radius R of Ra (mm), the first outer wall surface having an inclination angle θ
of θ
b (°
), an angular portion formed on the leading end of the first outer wall surface having a curvature radius R of Rb (mm), and a planar portion formed between the two angular portions having a width of ws (mm);
wherein the second section includes a second inner wall surface and a second outer wall surface, the second inner wall surface having an inclination angle θ
of θ
a′
(°
), an angular portion formed on the leading end of the second inner wall surface having a curvature radius R of Ra′
(mm), the second outer wall surface having an inclination angle θ
of θ
b′
(°
), an angular portion formed on the leading end of the second outer wall surface having a curvature radius R of Rb′
(mm), and a planar portion formed between the two angular portions having a width of ws′
(mm); and
wherein, when wa, wb, wa′
, and wb′
are defined to satisfy the equations wa=Ra×
cos θ
a−
(Ra−
Ra×
sin θ
a)×
tan θ
a, wb=Rb×
cos θ
b−
(Rb−
Rb×
sin θ
b)×
tan θ
b, wa′
=Ra′
×
cos θ
a′
−
(Ra′
−
Ra′
×
sin θ
a′
)×
tan θ
a′
, and wb′
=Rb′
×
cos θ
b′
−
(Rb′
−
Rb′
×
sin θ
b′
)×
tan θ
b′
, the difference L (mm) in width between the first section and the second section is expressed by the equation L={(wa−
wa′
)+(wb−
wb′
)+(ws−
ws′
)} and L>
0.
1 Assignment
0 Petitions
Accused Products
Abstract
An automobile undercarriage component is provided with a web and a rib. The rib is configured so as to comprise a first section that is a section having the widest width and a second section that has a narrower width than the first section, and the second section having a narrower rib width than the first section as a result of an inner wall surface of the second section that is continuously formed from the web being provided so as to be adjacent to a facing outer surface wall.
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Citations
10 Claims
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1. An automobile undercarriage component comprising:
-
an elongated arm comprising a web; and a rib connected to the web in a direction parallel to the plane of the web and transverse to the direction of elongation of the web, the rib having an inner wall surface extending from the rib to terminate at a leading end which is the end of the rib farthest from the web in a direction perpendicular to the plane of the web; wherein the rib includes a first section and a second section which are respectively arranged along the direction of elongation of the arm, wherein the second section is located adjacent a distal end of the arm in the direction of elongation and is arranged closer to the distal end than is the first section, a leading end of the second section having a width in the direction parallel to the plane of the web and transverse to the direction of elongation of the arm which is narrower than the width of a leading end of the first section, as an inner wall surface is disposed closer to an opposing outer wall surface in the second section as compared to the first section; wherein the first section includes a first inner wall surface formed and a first outer wall surface opposing the first inner wall surface, the first inner wall surface having an inclination angle θ
of θ
a (°
), an angular portion formed on the leading end of the first inner wall surface having a curvature radius R of Ra (mm), the first outer wall surface having an inclination angle θ
of θ
b (°
), an angular portion formed on the leading end of the first outer wall surface having a curvature radius R of Rb (mm), and a planar portion formed between the two angular portions having a width of ws (mm);wherein the second section includes a second inner wall surface and a second outer wall surface, the second inner wall surface having an inclination angle θ
of θ
a′
(°
), an angular portion formed on the leading end of the second inner wall surface having a curvature radius R of Ra′
(mm), the second outer wall surface having an inclination angle θ
of θ
b′
(°
), an angular portion formed on the leading end of the second outer wall surface having a curvature radius R of Rb′
(mm), and a planar portion formed between the two angular portions having a width of ws′
(mm); andwherein, when wa, wb, wa′
, and wb′
are defined to satisfy the equations wa=Ra×
cos θ
a−
(Ra−
Ra×
sin θ
a)×
tan θ
a, wb=Rb×
cos θ
b−
(Rb−
Rb×
sin θ
b)×
tan θ
b, wa′
=Ra′
×
cos θ
a′
−
(Ra′
−
Ra′
×
sin θ
a′
)×
tan θ
a′
, and wb′
=Rb′
×
cos θ
b′
−
(Rb′
−
Rb′
×
sin θ
b′
)×
tan θ
b′
, the difference L (mm) in width between the first section and the second section is expressed by the equation L={(wa−
wa′
)+(wb−
wb′
)+(ws−
ws′
)} and L>
0. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification
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Current AssigneeKlaus Schmidt
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Original AssigneeKobe Steel Limited
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InventorsWatanabe, Hiroaki, Okada, Keita, Hosoi, Hiroaki
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Primary Examiner(s)Verley, Nicole T
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Application NumberUS15/106,034Publication NumberTime in Patent Office1,155 DaysField of SearchUS Class CurrentCPC Class CodesB21J 5/02 Die forging; Trimming by ma...B21K 1/26 housings or supporting part...B60G 2200/1424 the lateral arm having an L...B60G 2206/014 with reinforcing nerves or ...B60G 2206/016 allowing controlled deforma...B60G 2206/12 with two attachment points ...B60G 2206/122 the arm having L-shapeB60G 2206/7102 Aluminium alloysB60G 2206/8101 by castingB60G 2206/81022 by forgingB60G 3/04 the arm being essentially t...B60G 7/001 Suspension arms, e.g. const...
