KR102209407B1 - Vechile frame - Google Patents

Abstract

The present invention is a pair of side member portions spaced apart; And a pair of cross member portions connected to the pair of side member portions and disposed to be spaced apart from each other, wherein an end portion of the cross member portion is inserted into the side member portion, and a cross-section is constant in the longitudinal direction. It provides a vehicle frame.

Description

Vehicle frame {VECHILE FRAME}

The present invention relates to a lightweight vehicle frame.

It should be noted that the contents described in this section merely provide background information on the present invention and do not constitute prior art.

Recently, in order to cope with the reinforced environmental regulations caused by global warming, the development of eco-friendly vehicles has been intensively conducted, and in particular, interest in pure electric vehicles driven only by batteries and motors is increasing.

On the other hand, as the price of batteries continues to decrease and interest in high-power electric vehicles grows, high-end electric vehicles are showing a trend to improve performance by attaching a front motor to a suspension, especially a front wheel cradle.

In such an environment, the demand for weight reduction is also increasing in order to increase the mileage possible with a single charge of the battery, and for this demand, technology development for reducing weight not only in the vehicle body but also in the suspension is in progress.

In terms of materials, the trend to apply aluminum to reduce the weight of the front wheel cradle is intensifying, but this increases the burden of automobile companies compared to the existing steel cradle in terms of cost. Accordingly, it is necessary to develop a cradle capable of reducing weight using steel.

On the other hand, the front wheel cradle must maintain sufficient rigidity.

The stiffness of the front wheel cradle properly responds to the load applied from the outside when the vehicle is driving, thereby providing the riding comfort and driving performance of the vehicle.

In addition, since the cradle is continuously applied with an external load on the road surface, it is necessary to ensure a sufficient durability so that there is no deterioration of its function during the driving period of the vehicle.

That is, the requirements for rigidity and durability must be satisfied at the same time.

Therefore, there is a need to propose an improved model of the front wheel cradle that can meet the rigidity and durability.

KR 20-1998-0045233 U

In one aspect, the present invention is to provide a vehicle frame capable of improving durability and reducing weight while increasing rigidity.

As an aspect for achieving the above object, the present invention is a pair of side member portions spaced apart; And, a pair of cross member portions connected to the pair of side member portions and disposed to be spaced apart from each other, wherein the cross member portion has an end portion inserted into the side member portion, and has a constant cross-section in the longitudinal direction. , The side member portion is formed by welding the split-type side member over the entire length direction to form a closed cross-section, and an open-type insertion point into which the cross member portion is inserted is formed, and the side member portion includes an upper portion of the side member portion. An upper side forming a cross section of the region; And a low side forming a cross section of a lower region of the side member part and forming a closed cross section together with the upper side, wherein the upper side includes: a first upper side member disposed in front; And a second upper side member that is bonded to the rear of the first upper side member and made of a material that is relatively thicker than that of the first upper side member, wherein the side member portion is 980 MPa or more and 1180 MPa or less. Consisting of a high-strength steel having a tensile strength, the cross member portion is composed of a high-strength steel having a tensile strength of more than 1180 MPa and less than 1300 MPa, the side member portion is composed of a high-strength steel having an elongation of 14% or more, and the cross member portion , A first cross member disposed in front of the vehicle based on the front-rear direction; And, a second cross member spaced apart from the first cross member and disposed at the rear thereof, wherein the first cross member has a length relatively longer than that of the second cross member, and is compared with the second cross member. It provides a vehicle frame, characterized in that the cross-section is configured to be relatively small.

Preferably, the cross member portion is disposed in the left and right directions of the vehicle, and may be formed of a rectangular linear member.

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Preferably, a first connection line is formed between the side member portion and the first cross member of the cross member portion, and a second connection line is formed between the side member portion and the second cross member of the cross member portion. Is formed, and the second connection line may be disposed in a central region relative to the left and right directions of the vehicle compared to the first connection line.

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Preferably, the side member portion may have a connection reinforcing portion whose cross-section increases from an insertion point where the cross member portion is inserted into the side member portion in a direction in which the cross member portion is inserted.

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Preferably, the cross member unit includes: a first cross member disposed in front of the vehicle in the front-rear direction; And, a second cross member spaced apart from the first cross member and disposed at the rear thereof, wherein a first left motor bracket and a first right motor bracket to which a front motor are respectively coupled are installed in the first cross member, A second motor bracket to which the front motor is coupled may be installed on the second cross member.

As another aspect for achieving the above object, the present invention is a pair of side member portions spaced apart; And, a pair of cross member portions connected to the pair of side member portions and arranged to be spaced apart from each other, wherein the side member portion is welded to form a closed cross-section by welding the divided side members over the entire length direction. And an open-type insertion point into which the cross member portion is inserted, and the side member portion comprises: an upper side forming a cross section of an upper region of the side member portion; And a low side forming a cross section of a lower region of the side member part and forming a closed cross section together with the upper side, wherein the upper side includes: a first upper side member disposed in front; And a second upper side member that is bonded to the rear of the first upper side member and made of a material that is relatively thicker than that of the first upper side member, wherein the side member portion is 980 MPa or more and 1180 MPa or less. It is composed of high-strength steel having tensile strength, and the cross member portion is composed of high-strength steel having a tensile strength of more than 1180 MPa and less than 1300 MPa, and the side member portion is composed of high-strength steel having an elongation of 14% or more, and the front and rear directions of the vehicle A first cross member disposed in front of the reference; And, a second cross member spaced apart from the first cross member and disposed at the rear thereof, wherein the first cross member has a length relatively longer than that of the second cross member, and It provides a vehicle frame, characterized in that the width in the direction is the same, the height in the vertical direction is relatively lower than that of the second cross member, and the cross section is relatively small compared to the second cross member.

According to an embodiment of the present invention, there is an effect of increasing the rigidity of a vehicle frame to improve durability and reduce weight.

1 is a perspective view of a vehicle frame according to an embodiment of the present invention.
2 is a perspective view of an exploded state of a vehicle frame according to an embodiment of the present invention.
3 is a plan view of a vehicle frame according to an embodiment of the present invention.
4 is a bottom view of a vehicle frame according to an embodiment of the present invention.
5 is a side view of a vehicle frame according to an embodiment of the present invention.
6 is a perspective view of a vehicle frame cut in a horizontal direction according to an embodiment of the present invention.
7 is a perspective view of a vehicle frame cut in a vertical direction according to an exemplary embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, embodiments of the present invention are provided in order to more completely explain the present invention to those with average knowledge in the art. In the drawings, the shapes and sizes of elements may be exaggerated for clearer explanation.

Hereinafter, a vehicle frame 10 according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 7, a vehicle frame 10 according to an embodiment of the present invention may include a side member portion and a cross member portion.

1 and 2, the vehicle frame 10 includes a pair of side member portions spaced apart and a pair of side member portions connected to each other, and a pair of cross member portions spaced apart from each other, and the cross The member portion may have an end portion inserted into the side member portion and have a constant cross-section in the longitudinal direction.

1 and 2, a pair of side member portions may be spaced apart from each other in the left-right direction D1 of the vehicle and extend in the front-rear direction D2 of the vehicle.

The side member portion is formed to extend in the longitudinal direction and may have a constant cross section in the width direction crossing the longitudinal direction.

The side member portion is formed to extend in the longitudinal direction D2 of the vehicle, and a pair of cross member portions may be connected.

A pair of side member portions may include a first side member 100 and a second side member 200.

Referring to FIG. 1, the first side member 100 and the second side member 200 are disposed to be spaced apart from each other in a left-right direction D1 of the vehicle, and may extend in the front-rear direction D2 of the vehicle.

1 and 2, the first lower arm bracket 110 to which the lower arm (not shown) on the left is fixed to the first side member 100, is located in front of the first side member 100, and The first front mounting member 130 and the first side member 100 to which the left front of the vehicle is fixed, and a first rear mounting member 150 to which the left rear of the vehicle body is fixed may be formed.

The second side member 200 has a second lower arm bracket 210 to which the right lower arm (not shown) is fixed, a second front mounting member 230 to which the right front of the vehicle body is fixed, and the right side of the vehicle body The second rear mounting member 250 to be fixed may be formed.

The lower arm (not shown) may be installed on the first side member 100 and the second side member 200, respectively.

A first lower arm coupling hole 111 may be formed through the rear of the first side member 100, and the first lower arm (not shown) on the left side is the first lower arm bracket 110 and the first lower arm. It is fixed over the coupling hole 111 and may be installed extending in the left direction of the first side member 100.

The second lower arm (not shown) installed on the second side member 200 via the second lower arm bracket 210 may be installed extending from the outer side of the second side member 200 to the right, which is an outer direction. have.

A second lower arm coupling hole 211 may be formed through the rear of the second side member 200, and the second lower arm (not shown) on the right side is the second lower arm bracket 210 and the second lower arm. It is fixed over the coupling hole 211 and may be installed extending in the right direction of the second side member 200.

Referring to FIGS. 1 and 2, the cross member portions may be disposed to be spaced apart in the front-rear direction D2 of the vehicle.

The cross member portion is formed to extend in the longitudinal direction and may have a constant cross section in the width direction crossing the longitudinal direction.

The cross member portion is formed to extend in the left and right direction D1 of the vehicle in the longitudinal direction and may connect a pair of side member portions.

For example, the cross-section of the cross member may be formed in a rectangular shape.

The end of the cross member part may be welded while being inserted into the side member part.

At this time, the cross member portion is inserted through an insertion point formed on the side of the side member portion, and a part of the end region of the cross member portion is disposed inside the closed end face (F) of the side member portion, and the cross member portion and the side member portion are welded together. Can be.

The first cross member 300 and the second cross member 400 are welded with one end inserted into the first side member 100 disposed on one side, and the second side disposed on the other side. It may be welded while being inserted into the member 200.

The first cross member 300 may be disposed in the front based on the front-rear direction D2 of the vehicle, and the second cross member 400 may be spaced apart from the first cross member 300 and disposed in the rear.

For example, the vehicle frame 10 of the present invention may be composed of a front wheel cradle installed in the front of the vehicle.

A first left motor bracket 310 and a first right motor bracket 320 to which a front motor (not shown) are respectively coupled may be installed on the first cross member 300.

A second motor bracket 410 to which a front motor (not shown) is coupled may be installed on the second cross member 400.

The side member portion and the cross member portion may be formed of a steel material such as a steel material.

In the vehicle frame 10 of the present invention, a pair of side member portions and a pair of cross member portions are mutually coupled, so that a compression force acting in the front and rear directions (D2) and the left and right directions (D1) of the vehicle frame 10 and, It can resist loads such as torsion.

Referring to FIGS. 1 and 2, the cross member portion may be formed of a linear member that is disposed in the left and right direction D1 of the vehicle, and has a rectangular shape and a constant cross section.

The cross member is formed extending in the left and right direction D1 of the vehicle, and may be formed of a tubular member having a constant cross section and hollow inside.

As an example, the cross member portion may be configured as a tubular member having a rectangular cross section with a hollow inside.

The cross member portion may have a straight member having a rectangular cross-section extending in the longitudinal direction.

For example, the cross member portion may be formed of a tubular member in which a metal plate is folded in multiple stages by a roll forming method, and both side ends folded in multiple stages are welded together to form a closed section (F).

The first cross member 300 and the second cross member 400 may be formed of a linear member with no height difference between the central region and both end regions.

Referring to FIGS. 1 and 2, the cross member part includes a first cross member 300 disposed in front of the vehicle in the front-rear direction D2, and spaced apart from the first cross member 300 and disposed in the rear. A second cross member 400 is provided, and the first cross member 300 has a relatively long length compared to the second cross member 400, and has a cross-section compared to the second cross member 400. It can be relatively small.

Referring to FIG. 7, the first cross-sectional area E1 of the first cross member 300 may be relatively smaller than the second cross-sectional area E2 of the second cross member 400. .

Specifically, the first cross member 300 may have the same width as the second cross member 400 in the horizontal direction, and may have a relatively lower height in the vertical direction than the second cross member 400.

Both ends of the cross member portion may be respectively inserted into insertion points of a pair of side member portions disposed to face each other.

At this time, the cross member portion is inserted through the insertion point of the side member portion, and a part of the end region of the cross member portion is disposed inside the closed end face F of the side member portion, and the cross member portion and the side member portion may be welded together. .

The side member portion has a first insertion point H1, which is an open portion into which the first cross member 300 is inserted, and a second insertion point H2, which is an open portion into which the second cross member 400 is inserted. I can.

3 and 4, a first connection line G1 as a connection part is formed between the side member part and the first cross member 300 of the cross member part, and the side member part and the cross member part 2 A second connection line G2, which is a connection part, is formed between the crossmembers 400, and the second connection line G2 is in the left-right direction D1 of the vehicle relative to the first connection line G1. It can be arranged in the central area based on.

The second connection line G2, which is a connection part between the side member part and the second cross member 400, is relative to the first connection line G1, which is a connection part between the side member part and the first cross member 300. As a result, it may be disposed in the center area relative to the left-right direction D1 of the vehicle.

The first cross member 300 is welded while being inserted into the first side member 100 and the second side member 200 respectively, and the first cross member 300 includes a pair of first connection lines ( G1) can be formed.

The second cross member 400 is welded while being inserted into the first side member 100 and the second side member 200 respectively, and the second cross member 400 includes a pair of second connection lines ( G2) can be formed.

The distance between the pair of second connection lines G2 may be formed relatively short compared to the distance between the pair of first connection lines G1.

1 and 2, the side member portion includes a first insertion point H1 into which the end of the first cross member 300 is inserted, and a second insertion point into which the second cross member 400 is inserted. A point H2 is formed, and the second insertion point H2 may be disposed in a central region compared to the first insertion point H1 based on the left and right direction D1 of the vehicle.

The end of the first cross member 300 is inserted into the side member part through the first insertion point H1, and the end of the second cross member 400 is inside the side member part through the second insertion point H2. Can be inserted into

The first separation distance between the pair of first insertion points H1 may have a relatively larger separation distance than the second separation distance between the pair of second insertion points H2.

Referring to FIGS. 2 and 4, the side member portion may be formed by welding a split side member to form a closed cross-section (F), and an open-type insertion point into which the cross member portion is inserted.

If the side member is not divided into a divided type but is composed of a tubular member, the formability may be deteriorated, and even if the side member is formed by a hydroforming method, there is a problem that the rigidity may decrease in the stretched area for forming. have.

Therefore, the vehicle frame 10 of the present invention can improve the formability of the side member portion by configuring the side member portion in a divided type, and increase the rigidity by forming a closed section F by welding the divided side members. have.

The divided side member may be divided over the entire length direction of the side member portion.

Referring to FIG. 5, as an example, the divided side member may have a'C' shape or a'U' shape in which one side is open.

A closed cross-section (F) may be formed by welding and joining two split side members having a'C'-shaped or'U'-shaped cross-section.

In this case, some of the split side members may be welded together in an overlapping state.

Specifically, a part of the end region of the'C'-shaped or'U'-shaped cross section of the side member disposed on the lower side is the inner surface of the end region of the'c'-shaped or'U'-shaped cross-section of the side member disposed on the upper side It can be welded in a superimposed state.

The split side member may be composed of an upper side S1 and a low side S2 divided in the height direction.

The side member portion may be required to have a more complex shape than the cross member portion.

The side member portion is a portion in which various components are combined, and a complicated shape may be required in relation to the component to be combined in the shape of the side member portion.

If the side member is not divided and processed, shape processing may be difficult.

Accordingly, in the vehicle frame 10 of the present invention, the side members of the split type are welded to form a closed cross-section F, thereby improving the formability of the side member portion.

Referring to FIGS. 1 and 2, both ends of the cross member portion may be respectively inserted into insertion points of a pair of side member portions disposed to face each other.

Referring to FIG. 2, the side member portion includes an open first insertion point H1 into which the first cross member 300 is inserted and an open second insertion point H2 into which the second cross member 400 is inserted. Can be formed.

Referring to FIG. 6, a part of the end region of the cross member part may be welded to the side member part while being disposed inside the closed end face F of the side member part through the insertion point.

1 and 2, a side member portion includes an upper side (S1) forming a cross section of an upper region of the side member portion, and a cross section of a lower region of the side member portion, and the upper side (S1) and It may be provided with a low side (S2) forming a closed cross-section (F) together.

For example, the low side (S2) and the upper side (S1) can process a metal plate cut into a predetermined shape into a shape designed by a processing method such as press processing or roll forming processing.

Referring to FIG. 5, the side member portion may be formed by welding and joining the processed end of the low side S2 and the end of the upper side S1 to overlap each other to form a closed cross-section F.

In a state in which the lower end of the upper side S1 is overlapped on the outside of the upper end of the lower side S2, the upper end of the low side S2 and the lower end of the upper side S1 may be welded together.

As an example, the side member part is processed into a shape in which one metal plate is designed in the low side (S2), and the upper side (S1) is processed into a shape in which two metal plates having different thicknesses are designed, and the front and rear sides of the two metal plates It can be welded while the directional ends are overlapped.

The upper side S1 may be made of a material whose rear is relatively thicker than the front side based on the front-rear direction D2 of the vehicle.

Referring to FIGS. 1 and 2, the upper side S1 may be welded in a state in which two metal plates having different thicknesses are processed into a designed shape, and the front and rear ends of the two metal plates are overlapped.

The low side S2 may be composed of one processed metal plate, and the upper side S1 may be composed of two processed metal plates.

The low side S2 is composed of one metal plate processed into a designed shape, and may form a cross section of the upper region of the side member portion.

The upper side S1 may be processed into a shape in which two metal plates having different thicknesses are designed. In this case, the thick metal plate may be welded in a state where the ends of the two metal plates are overlapped while the thick metal plate is disposed at the rear.

The upper side S1 may form a cross-section of the lower region of the side member portion while being welded while the ends of the two metal plates overlap each other in the front-rear direction D2.

In this case, a relatively thick metal plate among the two metal plates constituting the upper side S1 may be disposed at the rear.

1 and 2, the upper side (S1) is bonded to the rear of the first upper side member (S1-1) and the first upper side member (S1-1) disposed in the front, the A second upper side member S1-2 made of a material that is relatively thicker than the first upper side member S1-1 may be provided.

The first upper side member S1-1 and the second upper side member S1-2 may be welded together in a state where the ends in the front-rear direction D2 overlap.

For example, the first upper side member S1-1 may be welded while the inner surface of the end side of the second upper side member S1-2 overlaps the outer surface of the first upper side member S1-1.

3 and 4, the side member portion may be formed with a connection reinforcing portion (T) whose cross-section increases toward the cross member portion from an insertion point where the cross member portion is inserted into the side member portion. .

For example, the connection reinforcing portion T may be formed in a region into which the second cross member 400 is inserted as a side member portion.

Referring to FIGS. 3 and 4, the connection reinforcing portion T may form a trapezoidal region on the top and bottom views of the vehicle frame 10 of the present invention.

The connection reinforcing portion T may reinforce the stiffness in the coupling region coupled with the cross member portion as its cross-section increases in a direction away from the end of the cross member portion, which is a direction in which the cross member portion is inserted.

By forming the connection reinforcing portion T at the junction portion connected to the cross member portion, the side member portion has the effect of sufficiently securing a cross-sectional area of the junction portion of the side member portion and the cross member portion requiring relatively high rigidity.

The side member portion and the cross member portion may be formed of high-strength steel having a tensile strength of 980 MPa or more.

The present invention has an effect of improving the shape of the side member portion and the cross member portion and achieving weight reduction by applying a thin-thick high-strength steel and satisfying durability.

The cross member portion may be formed of a high-strength steel material having a relatively higher tensile strength than the side member portion, and the side member portion may be formed of a high-strength steel material having an elongation of 14% or more.

When the initial length is'A' and the extended length is'B', the elongation can be derived by the following equation (1).

Elongation (%) = [(B-A)/A] * 100 ... Equation (1)

As the tensile strength of the high-strength steel increases, the structural rigidity increases, but there is a problem in that the formability decreases.

The side member part is a part where various components are combined, and a complicated shape is required in relation to the component to be combined in the shape of the side member part.If a high-strength steel material with excessive tensile strength is used in the side member part, the elongation decreases and the side member There may be a problem that the part cannot be processed into a desired shape.

For example, the side member portion may be composed of a high-strength steel material having a tensile strength of 1180 MPa, and the cross member portion may be composed of a high-strength steel material having a tensile strength of 1300 MPa.

More preferably, the side member part may be composed of a high-strength steel material having a tensile strength of 980 MPa or more and 1180 MPa or less, and the cross member part may be composed of a high-strength steel material having a tensile strength of more than 1180 MPa and 1300 MPa or less.

For example, by configuring the side member portion of a high-strength steel material having a tensile strength of 1180 MPa or less, an elongation rate of 14% or more can be secured.

This is because when a steel material having a tensile strength exceeding 1180 MPa is applied to the side member, the elongation may be lower than 14%, making it difficult to form the side member.

Specifically, the side member portion may be composed of a high-strength steel material having a tensile strength of 1180 MPa, and the cross member portion may be composed of a high-strength steel material having a tensile strength of 1300 MPa.

Referring to FIGS. 1 and 2, the cross member part includes a first cross member 300 disposed in front of the vehicle in the front-rear direction D2, and spaced apart from the first cross member 300 and disposed in the rear. A second cross member 400 is provided, and a first left motor bracket 310 and a first right motor bracket 320 to which the front motors are respectively coupled are installed on the first cross member 300, and the first cross member 300 2 A second motor bracket 410 to which the front motor is coupled may be installed on the cross member 400.

Next, a vehicle frame 10 according to another embodiment of the present invention will be described in detail with reference to the drawings.

Vehicle frame 10 includes a pair of the side member part and the upper part of the side members said side members unit, comprising: a cross member unit of the connected parts of the side members of the pair, and spaced by a pair member which is disposed spaced And an upper side (S1) forming a cross-section of the region, and a low side (S2) forming a cross-section of a lower region of the side member portion and forming a closed cross-section (F) together with the upper side (S1), The upper side S1 may be made of a material having a relatively thick rear side compared to the front side based on the front-rear direction D2 of the vehicle.

In addition, it goes without saying that configurations of various side member portions and cross member portions of the vehicle frame 10 having various embodiments described above may be applied.

Accordingly, the configuration of the side member portion and the cross member portion of the vehicle frame 10 has already been described, and a detailed description thereof will be omitted to avoid redundancy.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and variations are possible without departing from the technical spirit of the present invention described in the claims. It will be obvious to those of ordinary skill in the field.

10: vehicle frame 100: first side member
110: first lower arm bracket 111: first lower arm coupling hole
130: first front mounting member 150: first rear mounting member
200: second side member 210: second lower arm bracket
211: second lower arm coupling hole 230: second front mounting member
250: second rear mounting member 300: first cross member
310: first left motor bracket 320: first right motor bracket
400: second cross member 410: second motor bracket
D1: left and right D2: forward and backward
E1: first cross section E2: second cross section
F: Closed section G1: 1st connection line
G2: second connection line H1: first insertion point
H2: 2nd insertion point S1: Upper side
S1-1: first upper side member S1-2: second upper side member
S2: Low side T: Connection reinforcement part

Claims (14)

A pair of side member portions spaced apart from each other; And,
Includes; a pair of cross member portions connected to the pair of side member portions and arranged to be spaced apart,
The cross member part,
The end is inserted into the side member part, the cross section is constant in the longitudinal direction,
The side member part,
Split-type side members are welded to form a closed cross-section over the entire length direction, and an open-type insertion point into which the cross member is inserted is formed,
The side member part,
An upper side forming a cross section of an upper region of the side member portion; And,
Including; a low side forming a cross section of the lower region of the side member part and forming a closed cross section together with the upper side,
The upper side,
A first upper side member disposed in front; And,
A second upper side member joined to the rear of the first upper side member and made of a material relatively thicker than the first upper side member; and
The side member portion is composed of a high-strength steel material having a tensile strength of 980 MPa or more and 1180 MPa or less, and the cross member portion is composed of a high-strength steel material having a tensile strength of more than 1180 MPa and 1300 MPa or less,
The side member portion is composed of a high-strength steel material having an elongation of 14% or more,
The cross member part,
A first cross member disposed in front of the vehicle in the front-rear direction; And,
Including; a second cross member spaced apart from the first cross member and disposed at the rear,
The first cross member,
A vehicle frame, characterized in that the length is relatively longer than that of the second cross member and the cross section is relatively smaller than that of the second cross member.
The method of claim 1, wherein the cross member part,
A vehicle frame, characterized in that it is arranged in the left and right directions of the vehicle and is formed of a rectangular linear member.
delete The method of claim 1,
A first connection line, which is a connection part, is formed between the side member part and the first cross member of the cross member part,
A second connection line, which is a connection part, is formed between the side member part and the second cross member of the cross member part,
The second connection line is a vehicle frame, characterized in that arranged in a central area relative to the left and right direction of the vehicle compared to the first connection line.
delete delete delete delete delete The method of claim 1, wherein the side member part,
A vehicle frame, characterized in that a connection reinforcing portion having a cross-section increasing in a direction in which the cross member is inserted is formed at an insertion point where the cross member is inserted into the side member.
delete delete The method of claim 1, wherein the cross member part,
A first cross member disposed in front of the vehicle in the front-rear direction; And,
Including; a second cross member spaced apart from the first cross member and disposed at the rear,
The first cross member is provided with a first left motor bracket and a first right motor bracket to which a front motor is respectively coupled,
A vehicle frame, wherein a second motor bracket to which the front motor is coupled is installed on the second cross member.
A pair of side member portions spaced apart from each other; And,
Includes; a pair of cross member portions connected to the pair of side member portions and arranged to be spaced apart,
The side member part,
Split-type side members are welded to form a closed cross-section over the entire length direction, and an open-type insertion point into which the cross member is inserted is formed,
The side member part,
An upper side forming a cross section of an upper region of the side member portion; And,
Including; a low side forming a cross section of the lower region of the side member part and forming a closed cross section together with the upper side,
The upper side,
A first upper side member disposed in front; And,
A second upper side member joined to the rear of the first upper side member and made of a material relatively thicker than the first upper side member; and
The side member part is composed of a high-strength steel material having a tensile strength of 980 MPa or more and 1180 MPa or less, and the cross member part is composed of a high-strength steel material having a tensile strength of more than 1180 MPa and 1300 MPa or less,
The side member portion is composed of a high-strength steel material having an elongation of 14% or more,
A first cross member disposed in front of the vehicle in the front-rear direction; And,
Including; a second cross member spaced apart from the first cross member and disposed at the rear,
The first cross member,
Compared to the second cross member, the length is relatively long, the width in the horizontal direction is the same as that of the second cross member, and the height in the vertical direction is relatively lower than that of the second cross member. Vehicle frame, characterized in that the configuration is relatively small.

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