U.S. patent application number 17/451923 was filed with the patent office on 2022-08-11 for insert of bed plate of vehicle.
The applicant listed for this patent is Hyundai Motor Company, Kia Corporation, Korea Sintered Metal Co., Ltd.. Invention is credited to Dong Kuk Jeong, Haksoo Kim, SeokJun Kim, Jin Wuk Lee, Jung Kil Suk.
Application Number | 20220252020 17/451923 |
Document ID | / |
Family ID | |
Filed Date | 2022-08-11 |
United States Patent
Application |
20220252020 |
Kind Code |
A1 |
Kim; Haksoo ; et
al. |
August 11, 2022 |
Insert of Bed Plate of Vehicle
Abstract
An insert for a bed plate according to an embodiment of the
present disclosure is coupled to a lower portion of an engine
block. The insert of the bed plate includes a crankshaft seating
portion disposed at a center and where a crankshaft is mounted. The
insert of the bed plate also includes a ladder frame fixing
portions that are disposed at opposite ends of the insert to
facilitate coupling to a ladder frame. The insert of the bed plate
also includes a plurality of protrusion portions that are formed on
both surfaces of the insert and contact the ladder frame.
Inventors: |
Kim; Haksoo; (Seoul, KR)
; Kim; SeokJun; (Seoul, KR) ; Suk; Jung Kil;
(Daegu, KR) ; Jeong; Dong Kuk; (Daegu, KR)
; Lee; Jin Wuk; (Daegu, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hyundai Motor Company
Kia Corporation
Korea Sintered Metal Co., Ltd. |
Seoul
Seoul
Daegu |
|
KR
KR
KR |
|
|
Appl. No.: |
17/451923 |
Filed: |
October 22, 2021 |
International
Class: |
F02F 7/00 20060101
F02F007/00; F16C 35/02 20060101 F16C035/02 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 9, 2021 |
KR |
10-2021-0018033 |
Claims
1. An insert for a bed plate, coupled to a lower portion of an
engine block, comprising: a crankshaft seating portion disposed at
a center and where a crankshaft is mounted; ladder frame fixing
portions that are disposed at opposite ends of the insert to
facilitate coupling to a ladder frame; and a plurality of
protrusion portions that are formed on both surfaces of the insert
and contact the ladder frame.
2. The insert for the bed plate of claim 1, wherein each of the
plurality of protrusion portions comprises a groove that is formed
to retreat toward an inside of the insert by a certain distance
from a surface of the insert, and a protrusion that is formed to
protrude toward an outside of the insert by a certain distance in
the groove.
3. The insert for the bed plate of claim 2, wherein the groove is
formed in a trapezoid shape in which a width in an inner side of
the insert is smaller than a width in an outer side of the insert
on a cross-section of the insert, and the protrusion is formed in a
trapezoid shape in which a width in an inner side of an insert is
larger than a width in an outer side of the insert on a
cross-section of the insert.
4. The insert of the bed plate of claim 3, wherein the groove and
the protrusion are formed in the shape of a circle on a plane of
the insert.
5. The insert of the bed plate of claim 3, wherein a width of the
groove in an inner side of the insert is larger than a width of the
protrusion in an outer side of the insert.
6. The insert of the bed plate of claim 3, wherein a depth of the
groove is lower than a height of the protrusion.
7. The insert of the bed plate of claim 2, wherein corners of the
groove and the protrusion are rounded on a cross-section of the
insert.
8. The insert of the bed plate of claim 1, wherein the insert is
formed of any one of cast iron, a sintered material, and a forging
material.
9. The insert of the bed plate of claim 1, wherein the plurality of
protrusion portions are formed in a surface space between the
ladder frame fixing portions at the opposite ends of the insert and
the crankshaft seating portion.
10. The insert of the bed plate of claim 9, wherein the plurality
of protrusion portions are disposed side by side in a rounded shape
so as to correspond to an edge shape of the crankshaft seating
portion.
11. The insert of the bed plate of claim 10, wherein the plurality
of protrusion portions are disposed closer to the end face side of
the insert than the outer edge of the crankshaft seating portion.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to and the benefit of
Korean Patent Application No. 10-2021-0018033 filed in the Korean
Intellectual Property Office on Feb. 9, 2021, the entire contents
of which are incorporated herein by reference.
TECHNICAL FIELD
[0002] The present disclosure relates to an insert of a bed plate
of a vehicle. More particularly, the present disclosure relates to
an insert for a bed plate of a vehicle, of which protrusions are
formed in the surface of the insert.
BACKGROUND
[0003] In general, as shown in FIG. 1 and FIG. 2, a coupling
structure of an engine block of an internal combustion engine is
provided by coupling a bed plate 30 to a lower portion of an engine
block 10. The bed plate 30 includes a ladder frame 20 and an insert
(bearing cap, 100), and the insert 100 is mounted to the ladder
frame 20. The ladder frame 20 of the bed plate 30 is mainly made of
aluminum for weight reduction, and the insert 100, which is the
main stress part, is integrally formed to this ladder frame 20. The
insert 100 is manufactured by casting from cast iron or by
inserting cast iron inserts into an aluminum die casting mold. Such
a structure constitutes a strength structure that is advantageous
for high rotation, and the vehicle's noise, vibration, and
harshness (NVH) characteristics become excellent.
[0004] However, it is important to secure the volume of the insert
100 so that it has sufficient strength in order for the insert 100
to support the crankshaft's behavior, but the thickness of the
aluminum casting portion (ladder frame) 20 is inevitably reduced in
the layout. In order to make the aluminum casting portion 20 thick
enough, the volume of the insert 100 must be reduced, but there is
a problem of lowering the strength.
[0005] Therefore, the mechanical adhesion between the insert 100
and the aluminum casting portion 20 needs to be increased to
prevent the thin aluminum casting portion 20 from cracking due to
vibration, so an aluminum thermal spray coating treatment is
carried out to improve durability, but there is a problem that this
requires a high cost. As another alternative, a structure in which
a protrusion is formed on the surface of the insert 100 can be
applied, but when applying a general protrusion, the protrusion in
a narrow path between a mold and the insert 100 interferes with the
flow of an aluminum molten metal, causing a difficulty in the
casting of the ladder frame 20.
[0006] The above information disclosed in this Background section
is only for enhancement of understanding of the background of the
present disclosure, and therefore it may contain information that
does not form the prior art that is already known in this country
to a person of ordinary skill in the art.
SUMMARY
[0007] The present disclosure is intended to solve the above
problem, and the purpose of the present disclosure is to form a
protrusion portion including a groove and a protrude portion formed
in the groove on a surface of an insert for a bed plate of a
vehicle, thereby improving flow of molten aluminum and
simultaneously improving adhesion an aluminum casting layer.
[0008] An insert for a bed plate according to an embodiment of the
present disclosure is coupled to a lower portion of an engine
block, and includes: a crankshaft seating portion disposed at a
center and where a crankshaft is mounted; ladder frame fixing
portions that are disposed at opposite ends of the insert to
facilitate coupling to a ladder frame; and a plurality of
protrusion portions that are formed on a surface of the insert and
contact the ladder frame.
[0009] Each of the plurality of protrusion portions may include a
groove that is formed to retreat toward the inside of the insert by
a certain distance from the surface of the insert, and a protrusion
that is formed to protrude toward the outside of the insert by a
certain distance in the groove.
[0010] The groove may be formed in a trapezoid shape in which a
width in an inner side of the insert is smaller than a width in an
outer side of the insert on a cross-section of the insert, and the
protrusion may be formed in a trapezoid shape in which a width in
an inner side of an insert is larger than a width in an outer side
of the insert on a cross-section of the insert.
[0011] The groove and the protrusion may be formed in the shape of
a circle on a plane of the insert.
[0012] A width of the groove in an inner side of the insert may be
larger than a width of the protrusion in an outer side of the
insert.
[0013] A depth of the groove may be lower than a height of the
protrusion.
[0014] Corners of the groove and the protrusion may be rounded on a
cross-section of the insert.
[0015] The insert may be formed of any one of cast iron, a sintered
material, and a forging material.
[0016] The plurality of protrusion portions may be formed in a
surface space between the ladder frame fixing portions at the
opposite ends of the insert and the crankshaft seating portion.
[0017] The plurality of protrusion portions may be disposed side by
side in a rounded shape so as to correspond to an edge shape of the
crankshaft seating portion.
[0018] The plurality of protrusion portions may be disposed closer
to the end face side of the insert than the outer edge of the
crankshaft seating portion.
[0019] According to the embodiment of the present disclosure, a
protrusion portion including a groove and a protrude portion is
formed in the groove on a surface of an insert for a bed plate of a
vehicle, and thus flow of molten aluminum can be improved and
adhesion an aluminum casting layer can be improved.
[0020] In addition, the protrusion portion of the insert serves to
fix the aluminum ladder frame when an external force is applied,
thereby reducing deformation of the aluminum ladder frame due to
over-vibration.
[0021] In addition, the cost can be reduced by eliminating the
expensive aluminum spray coating.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 schematically illustrates a coupling structure of an
internal combustion engine block according to an embodiment of the
present disclosure.
[0023] FIG. 2 schematically illustrates a bed plate according to
the embodiment of the present disclosure.
[0024] FIG. 3 is a schematic perspective view of an insert for the
bed plate according to the embodiment of the present
disclosure.
[0025] FIG. 4 is a schematic cross-sectional view of the insert for
the bed plate according to the embodiment of the present
disclosure.
[0026] FIG. 5 is a schematic cross-sectional view of a protrusion
portion according to the embodiment of the present disclosure.
[0027] FIG. 6 is a schematic perspective view of an insert of a bed
plate according to another embodiment of the present
disclosure.
[0028] FIG. 7 is a schematic perspective view of an insert of a bed
plate according to another embodiment of the present
disclosure.
[0029] FIG. 8 is a schematic cross-sectional view of the insert of
the bed plate according to the other embodiment of the present
disclosure.
[0030] FIG. 9 is a schematic cross-sectional view of a protrusion
portion according to another embodiment of the present
disclosure.
[0031] FIG. 10 is a cross-sectional view provided for description
of a dimensional relationship of a protrusion portion according to
an embodiment of the present disclosure.
DETAILED DESCRIPTION
[0032] In the following detailed description, only certain
exemplary embodiments of the present disclosure have been shown and
described, simply by way of illustration. The present disclosure
may be implemented in various different forms and is not limited to
the embodiments described herein.
[0033] In addition, in various embodiments, constituent elements
having the same configuration are representatively described in an
embodiment using the same reference numerals, and in other
embodiments, only configurations different from the embodiment will
be described.
[0034] Note that the drawings are schematic and are not drawn to
scale. Relative dimensions and ratios of portions in the drawing
are shown exaggerated or reduced in size for clarity and
convenience in the drawing, and arbitrary dimensions are merely
examples and are not limiting. In addition, the same reference
numerals are used to indicate similar features for the same
structure, element, or part shown in the drawings of two or more.
When a part is referred to as being "above" or "on" another part,
it may be directly on top of another part, or another part may be
in between.
[0035] An embodiment of the present disclosure specifically
represents an embodiment of the present disclosure. As a result,
numerous variations of the diagram are expected. Accordingly, the
embodiment is not limited to a specific form in the illustrated
area, and includes, for example, a modification of the form by
manufacturing.
[0036] Hereinafter, an insert structure for a bed plate of a
vehicle according to an embodiment of the present disclosure will
be described with reference to the accompanying drawings.
[0037] FIG. 3 is a schematic perspective view of an insert for a
bed plate according to an embodiment of the present disclosure,
FIG. 4 is a schematic cross-sectional view of the insert for the
bed plate according to the embodiment of the present disclosure,
and FIG. 5 is a schematic cross-sectional view of a protrusion
portion according to the embodiment of the present disclosure.
[0038] An insert 100 for a bed plate according to an embodiment of
the present disclosure is a constituent element of a bed plate 30
coupled to a lower portion of an engine block 10 of a vehicle, and
as shown in FIG. 1 and FIG. 2, the bed plate 30 includes a ladder
frame 20 and a plurality of inserts 100, and has a structure in
which the plurality of inserts 100 are mounted to a center of the
ladder frame 20.
[0039] The plurality of inserts 100 are mounted in a row along the
center of the ladder frame 20, a crankshaft (not shown) is seated
over the plurality of inserts 100, and the crankshaft is inserted
into a circular passage formed by combining the engine block 10
with the bed plate 30. A piston is coupled to the crankshaft in a
vertical direction, and the piston moves reciprocally in the
vertical direction according to the rotation of the crankshaft.
[0040] As shown in FIG. 3, the insert 100 includes a crankshaft
seating portion 140, a ladder frame fixing portion 160, and a
plurality of protrusion portions 150. The crankshaft seating
portion 140 is disposed at a central portion of the insert 100, and
is formed in a semicircular shape such that the crankshaft can be
seated. In addition, the ladder frame fixing portion 160 is
disposed at opposite ends of the insert 100 such that both ends of
the insert 100 can be fitted into the ladder frame 20. In addition,
the insert 100 is fitted to the ladder frame 20, and the insert 100
is bolted to the ladder frame 20 through a bolt fixing portion 120
formed through the insert 100 at both ends of the insert 100 such
that the insert 100 can be more rigidly fixed in the ladder frame
20.
[0041] Meanwhile, the insert 100 may be formed of any one of cast
iron, a sintered material, and a forging material.
[0042] A plurality of protrusion portions 150 may be formed at the
both surfaces of the insert 100. The plurality of protrusion
portions 150 may be formed in a surface space between the ladder
frame fixing portions 160 at opposite ends of the insert 100 and
the crankshaft seating portion 140.
[0043] The protrusion portion 150 may have a structure including a
groove 154 and a protrusion 152 formed inside the groove 154. The
groove 154 may be formed to retreat toward the inside of the insert
100 by a certain distance from the surface of the insert 100, that
is, a reference plane, and the protrusion 152 protrudes toward the
outside of the insert 100 by a predetermined distance from the
surface of the insert 100 within the groove 154.
[0044] As a height of the protrusion 152 is higher, adhesion with
the aluminum casting portion (aluminum ladder frame) is improved,
but flowability of the aluminum molten metal between the protrusion
152 and a mold 180 deteriorates when the aluminum casting portion
is manufactured. Meanwhile, as a depth of the groove 154 is thin,
the flowability of the aluminum molten metal is improved, but the
adhesion with the aluminum ladder frame is deteriorated. Thus, it
is necessary to apply a protrusion portion structure to improve the
adhesion between the insert 100 and the aluminum casting portion
while also improving the flowability of the aluminum molten
metal.
[0045] For this, the protrusion portion 150 according to the
embodiment of the present disclosure is provided in a form that
includes the protrusion 152 protruding toward the outside of the
insert 100 in the groove 154 that is formed to be retreated toward
the inside the insert 100.
[0046] That is, as shown in FIG. 5, in the reference plane, which
is the surface of the insert 100, the groove 154 is formed in a
retracted shape toward the inside of the insert 100, and the
protrusion 152 is formed in a shape protruded toward the outside of
the insert 100. In this case, the groove 154 and the protrusion 152
may be formed in a trapezoid shape on the cross-section of the
insert 100. In addition, the groove 154 and the protrusion 152 may
be formed in a circular shape on the plane of the insert 100.
[0047] Since the protrusion 152 is formed in a trapezoid conical
shape with such low complexity, it is possible to prevent the
fatigue characteristic of the aluminum casting from being reduced,
while simultaneously improving the adhesion with the aluminum
casting.
[0048] FIG. 6 and FIG. 7 are schematic perspective views of an
insert of a bed plate according to another embodiment of the
present disclosure, and FIG. 8 is a schematic cross-sectional view
of the insert of the bed plate according to the other embodiment of
the present disclosure.
[0049] As shown in FIG. 6 and FIG. 7, a plurality of protrusion
portions 250 of an insert 200 according to another embodiment of
the present disclosure may be formed in a space between ladder
frame fixing portions 260 at opposite ends of the insert 200 and a
crankshaft seating portion 240, and may be disposed side by side in
a rounded shape so as to correspond to an edge shape of the
crankshaft seating portion 240.
[0050] In addition, the plurality of protrusion portions 250 may be
disposed closer to the end face side of the insert 200 than the
outer edge of the crankshaft seating portion 240.
[0051] In addition, as shown in FIG. 8, a groove 254 of the
protrusion portion 250 may be formed to retreat toward the inside
of the insert 100 by a certain distance from a reference plane of
the insert 100, and a protrusion 152 protrudes toward the outside
of the insert 100 by a predetermined distance from the reference
plane of the insert 100 within the groove 154.
[0052] As in the embodiment of FIG. 1 to FIG. 5, the insert 200
according to the other embodiment of the present disclosure
includes the crankshaft seating portion 240 and the ladder frame
fixing portion 260, both ends of the insert 100 can be fitted into
the ladder frame 20 by the ladder frame fixing portion 260, and the
insert 200 is bolted to the ladder frame 20 through a bolt fixing
portion 120, and thus no further detailed description will be
provided.
[0053] FIG. 9 is a schematic cross-sectional view of a protrusion
portion according to another embodiment of the present
disclosure.
[0054] As shown in FIG. 9, edges of a protrusion portion 172 and a
groove 174 of the protrusion portion 170 may be formed in a rounded
shape in the cross-section of an insert 100. That is, due to the
dimple effect generated by forming the streamlined groove 174,
resistance to the protrusion portion 170 when the aluminum molten
metal flows is reduced, and thus flowability of the molten metal
may be improved. In addition, an edge of the end of the protrusion
portion 172 to be rounded, and thus is possible to further improve
the flowability of the aluminum molten metal. The shape of
protrusion portion shown in FIG. 9 may be applied to the insert for
the bed plate according to the embodiment of the present
disclosure, described with reference to FIG. 3 to FIG. 5 and may be
applied to the insert for the bed plate according to the other
embodiment of the present disclosure, described with reference to
FIG. 6 to FIG. 8.
[0055] FIG. 10 is a cross-sectional view provided for description
of a dimensional relationship of a protrusion portion according to
an embodiment of the present disclosure.
[0056] Referring to FIG. 10, a groove 154 of a protrusion portion
150 may be formed in a trapezoid shape in which a width a in an
inner side of an insert 100 is smaller than a width e in an outer
side of the insert 100 on a cross-section. In addition, the
protrusion portion 150 may be formed in a trapezoid shape in which
a width b in the inner side of the insert 100 is greater than a
width fin the outer side of the insert 100 on a cross-section.
[0057] In addition, the width a of the groove 154 in the inner side
of the insert 100 may be larger than the width b of the protrusion
152 in the inner side of the insert 100, and a depth c of the
groove 154 may be smaller than a height d of the protrusion
152.
[0058] Due to the structure in which the protrusion 152 is formed
in the groove 154 of the insert 100 as described above, the depth
of the groove 154 can be made shallow such that the flowability of
the aluminum molten metal can be improved when manufacturing the
aluminum casting portion, and at the same time, the height of the
protrusion 152 can be increased, thereby improving adhesion with
the aluminum casting portion.
[0059] The dimensional relationship of the protrusion has been
exemplarily described with the shape of the protrusion portion 150
according to the embodiment of the present disclosure, but it may
be equally applied to the shape of the protrusion portion 170 of
FIG. 9.
[0060] As described above, according to the embodiment of the
present disclosure, a protrusion portion including a groove and a
protrusion formed in the groove is formed on the insert surface, so
the flow of molten metal becomes smooth during casting of the
aluminum ladder frame, and adhesion with the completed aluminum
ladder frame can be improved.
[0061] In addition, the protrusion portion of the insert serves to
fix the aluminum ladder frame when external force is applied,
thereby reducing easy deformation of the aluminum ladder frame due
to over-vibration.
[0062] In addition, cost can be reduced by eliminating the
expensive aluminum spray coating.
[0063] While the present disclosure has been described in
connection with what is presently considered to be practical
embodiments, it is to be understood that the present disclosure is
not limited to the disclosed embodiments. On the contrary, it is
intended to cover various modifications and equivalent arrangements
included within the spirit and scope of the appended claims.
* * * * *