JP7062428B2 - Vehicle subframe - Google Patents

Description

The present invention relates to a vehicle subframe, and more particularly to a vehicle subframe that supports a suspension arm or the like and is mounted on a vehicle such as an automobile.

In recent years, various external force application parts such as suspension-related parts such as suspension arms and stabilizers, steering-related parts such as steering gearboxes, and mount-related parts of engine / transmission systems are mounted on subframes mounted on vehicles such as automobiles. It is supposed to be done.

Therefore, it is required that such a subframe be mounted on the vehicle body in a manner in which its strength and rigidity are further increased while improving its productivity and the like.

Also, for such a subframe, it is deformed in the desired deformation mode to absorb some of the kinetic energy that the vehicle receives during the collision, typically in the event of a frontal collision of the vehicle on which it is mounted. In other words, it is required to exhibit the required collision performance.

Under such circumstances, Patent Document 1 extends in the front-rear direction of the vehicle, and has a side member 11 whose front end and rear end are connected to the vehicle body frame, and which is overlapped with the side member 11 to connect the side member 11. The rear cross member 12 extending in the vehicle width direction, the extending portion 13 extending forward from the overlapping portion T of the side member 11 and the rear cross member 12 to the front of the vehicle, and the extending portion 13 integrally formed with the rear cross member 12, and the overlapping portion. Disclosed is a subframe structure 1 provided with a mounting stay 15 for a vehicle body frame provided at a rear end portion of the T.

Japanese Unexamined Patent Publication No. 2016-060311

However, according to the study of the present inventor, in the configuration of Patent Document 1, a press-molded product such as an aluminum alloy is used for the lower side member 11a and the upper side member 11b, and the rear cross member 12 and the stretched portion are used. Since it is premised that a cast product such as an aluminum alloy is used for the integrally molded product and the mounting stay 15 with 13, the press-molded product and the cast product are mixed and the configuration is complicated, and they are complicated. There is room for improvement as there is a tendency for various types of welding to be used.

Further, Patent Document 1 describes a specific configuration in which, when the main constituent material of the subframe is unified into a press-molded product, it exhibits high strength and rigidity equal to or higher than the configuration and exhibits the required collision performance. It does not disclose or suggest anything.

The present invention has been made through the above studies, and is a vehicle capable of increasing strength and rigidity and exhibiting required collision performance while uniformly applying press-molded products to the main constituent materials. The purpose is to provide a subframe for.

In order to achieve the above object, the first aspect of the present invention is a vehicle subframe mounted on a vehicle body, which extends in the front-rear direction of the vehicle body and faces each other in the width direction of the vehicle body. The first side member and the second side member, each of which is composed of a plate member, are arranged so as to extend in the width direction, and the first side member and the second side are arranged. A cross member made of a plate member, which connects members and projects upward from the first side member and the cross member on one side in the width direction, and is made of a plate member. A vehicle body mounting member of 1 and a second vehicle body mounting member formed of a plate member, which projects upward from the second side member and the cross member on the other side in the width direction. The first side member has a first front vehicle body mounting portion on the front side in the front-rear direction and a first rear vehicle body mounting portion on the rear side in the front-rear direction. The side member has a second front vehicle body mounting portion on the front side and a second rear vehicle body mounting portion on the rear side, and the first side member and the second side member are The first vehicle body mounting member is the first front vehicle body mounting portion and the first rear vehicle body mounting portion. It has a first middle body mounting portion located between them, and has a configuration welded to the first side member and the cross member in a manner of contacting the first side member and the cross member. The second vehicle body mounting member has a second middle vehicle body mounting portion located between the second front vehicle body mounting portion and the second rear vehicle body mounting portion, and has the second side surface. It has a configuration welded to the second side member and the cross member in a manner of contacting the member and the cross member, and is arranged on the rear side of the cross member in the front-rear direction. The first side member, the first side member, the cross member, the first vehicle body mounting member, and the second vehicle body mounting member in contact with each of the first side member, the second side member, the cross member, and the second vehicle body mounting member. A vehicle subframe having a structure welded to each of a second side member, the cross member, the first vehicle body mounting member, and the second vehicle body mounting member, and further including a rear member made of a plate member . be.

Further, in the present invention, in addition to the first aspect, in the cross member, the first end portion and the second end portion, which are both ends of the cross member in the width direction, are the first side member and the first side member. The first end portion and the second end portion are in contact with the first side member and the second side member on the upward side of the second side member. Has a structure welded corresponding to the first side member and the second side member, and the first vehicle body mounting member is said to be on the upward side of the first side member. The first end is welded corresponding to the first side member in the manner of contacting the first side member, and on the upward side of the first end of the cross member. The second vehicle body mounting member has a structure welded to the cross member in a manner in contact with the portion, and the second vehicle body mounting member is attached to the second side member on the upward side of the second side member. In the abutted mode, the second side member is welded and the cross member is in contact with the second end on the upward side of the second end of the cross member. The second aspect is to have a structure welded to the cross member.

Further, in addition to the second aspect, the present invention provides a first open end portion defined by the first vehicle body mounting member and the cross member in cooperation with each other on the side of the first end portion. Further, the first open end is configured with a first support for supporting the corresponding one of the plurality of suspension arms, and the second vehicle body is mounted on the side of the second end. A second support that further has a second open end defined in collaboration with the member and the cross member, and supports the corresponding one of the plurality of suspension arms at the second open end. A portion is configured and disposed on the rearward side of the first support portion, and the first side member and the rear member cooperate with each other to correspond to the plurality of suspension arms. A third support portion is configured to support the suspension, which is arranged on the rearward side of the second support portion, and the second side member and the rear member cooperate with each other to form the plurality of suspensions. The third aspect is that a fourth support portion for supporting the corresponding one in the arm is configured.

Further, in addition to the third aspect, the present invention comprises a straight line connecting the first support portion and the fourth support portion and a straight line connecting the second support portion and the third support portion. A plurality of regions are defined for the rear member in a plan view, and the plurality of regions are a first region extending from an intersection formed by the straight lines toward the one side in the width direction, and a first region extending from the intersection to the width direction. It has a second region extending toward the other side, a third region extending from the intersection toward the front side, and a fourth region extending from the intersection toward the rear side. The fourth station , however, has the rear member correspondingly having a first hole portion, a second hole portion, and a third hole portion in the first region, the second region, and the fourth region. Make it a face.

Further, in the present invention, in addition to the fourth aspect, the rear member has a width in the width direction between the end portions of the first hole portion and the third hole portion adjacent to each other in the width direction. Has a first surface portion extending in the front-rear direction, and has a width in the width direction between the end portions of the second hole portion and the third hole portion adjacent to each other in the width direction. The second surface portion has a second surface portion extending in the front-rear direction, and is between the adjacent ends of the first hole portion and the third hole portion in the front-rear direction. A fifth station having a third surface portion having a width in the front-rear direction and extending in the width direction between the hole portion and the end portions of the third hole portion adjacent to each other in the front-rear direction. Make a face.

According to the configuration in the first aspect of the present invention, the vehicle subframe includes a first side member, a second side member, a cross member, a first vehicle body mounting member, and a second vehicle body mounting member. The first side member has a first front vehicle body mounting portion on the front side in the front-rear direction and a first rear vehicle body mounting portion on the rear side in the front-rear direction, and has a second side. The member has a second front vehicle body mounting portion on the front side and a second rear vehicle body mounting portion on the rear side, and the first side member and the second side member abut on the cross member. In this embodiment, the first middle vehicle body mounting member has a structure welded to the cross member, and the first vehicle body mounting member is located between the first front vehicle body mounting portion and the first rear vehicle body mounting portion. It has a portion and has a configuration welded to the first side member and the cross member in a manner of contacting the first side member and the cross member, and the second vehicle body mounting member is a second front vehicle body. It has a second middle body mounting part located between the mounting part and the second rear body mounting part, and also has a second side member and a cross member in contact with the second side member and the cross member. Since it has a structure welded to, the cross member is applied to the first side member and the second side member in a manner in which the main constituent material of the vehicle subframe is uniformly applied to the press-molded product. , The first vehicle body mounting member and the second vehicle body mounting member are correspondingly directly welded and integrated, thereby increasing the strength and rigidity of the vehicle subframe and typically. Reliably distributes and transmits the impact force applied at the time of a frontal collision of the vehicle from the first side member and the second side member to the cross member, the first vehicle body mounting member, and the second vehicle body mounting member. By doing so, it is possible to suppress the occurrence of unnecessary deformation and crushing of the vehicle subframe and to exhibit the required collision performance. Further, according to the configuration in the first aspect of the present invention, the cross member is arranged on the rear side in the front-rear direction, and the first side member, the second side member, the cross member, and the first side member are arranged. Each of the first side member, the second side member, the cross member, the first vehicle body mounting member, and the second vehicle body mounting member is in contact with each of the vehicle body mounting member and the second vehicle body mounting member. Since it has a welded structure and further includes a rear member made of a plate member, the support strength and rigidity of the steering gear box and stabilizer in the vehicle subframe and the mounting strength and rigidity of the vehicle subframe to the vehicle body can be determined. Can be increased.

Further, according to the configuration in the second aspect of the present invention, the cross member has the first end portion and the second end portion which are both ends in the width direction of the cross member, and the first side member and the second end portion. On the upward side of the side member, the first end and the second end are the first side member and the second in a manner corresponding to the first side member and the second side member. The first vehicle body mounting member has a structure welded corresponding to the side member of the first side member, and the first vehicle body mounting member abuts on the first side member on the upward side of the first side member. It has a configuration in which it is welded to the cross member and is welded to the cross member in such a manner that it is welded corresponding to the side member and is in contact with the first end on the upward side of the first end of the cross member. The vehicle body mounting member of 2 is welded corresponding to the second side member in a manner in which the vehicle body mounting member of 2 is in contact with the second side member on the upward side of the second side member, and the second side member of the cross member is second. Since it has a structure welded to the cross member in a manner of contacting the second end on the upward side of the end of the vehicle, the collision performance of the vehicle subframe is enhanced and the vehicle sub is used. It is possible to increase the supporting strength and rigidity of the suspension arm and the engine mount in the frame, and the mounting strength and rigidity of the vehicle subframe to the vehicle body.

Further, according to the configuration in the third aspect of the present invention, the first open end portion defined by the first vehicle body mounting member and the cross member in cooperation with each other on the side of the first end portion of the cross member. A first support portion for supporting the corresponding one of the plurality of suspension arms is configured at the first open end portion, and a second vehicle body is formed on the side of the second end portion of the cross member. It further has a second open end defined by the mounting member and the cross member working together, and the second open end has a second support that supports the corresponding of the plurality of suspension arms. A third support configured and disposed on the posterior side of the first support, with the first side member and rear member working together to support the corresponding of the plurality of suspension arms. A fourth in which the portions are configured and disposed on the rear side of the second support and the second side and rear members work together to support the corresponding of the plurality of suspension arms. Since the support portion is configured, the support strength and rigidity of the suspension arm in the vehicle subframe can be further increased.

Further, according to the configuration in the fourth aspect of the present invention, a straight line connecting the first support portion and the fourth support portion and a straight line connecting the second support portion and the third support portion are used in a plan view. In the rear member, a plurality of regions are defined, and the plurality of regions are a first region extending from the intersection formed by the straight lines toward one side in the width direction and a second region extending from the intersection toward the other side in the width direction. It has a region, a third region extending from the intersection toward the front side, and a fourth region extending from the intersection toward the rear side, and the rear members are the first region, the second region, and the fourth region. In the region, since the first hole portion, the second hole portion, and the third hole portion are correspondingly provided, the strength, rigidity, and collision performance of the vehicle subframe are further enhanced. It is also possible to reduce the weight.

Further, according to the configuration in the fifth aspect of the present invention, between the end portions adjacent to each other in the width direction of the first hole portion and the third hole portion, the width is exhibited in the width direction and the width is extended in the front-rear direction. A second having a first surface portion existing, and having a width in the width direction and extending in the front-rear direction between the end portions adjacent to each other in the width direction of the second hole portion and the third hole portion. Ends that have a surface and are adjacent to each other in the front-rear direction of the first hole and the third hole, and are adjacent to each other in the front-back direction of the second hole and the third hole. Since the rear member has a third surface portion having a width in the front-rear direction and extending in the width direction, the first surface portion and the second surface portion are formed in the first hole portion and the second surface portion in the rear member. In addition to being able to connect to a high-rigidity portion other than the hole portion and the third hole portion, the first surface portion and the second surface portion can be connected by the third surface portion, so that the vehicle subframe can be used. , It is possible to reduce the weight without impairing its increased strength, rigidity and collision performance.

FIG. 1 is a plan view showing a configuration of a vehicle subframe according to an embodiment of the present invention. FIG. 2 is a bottom view showing the configuration of the vehicle subframe in the present embodiment. FIG. 3 is a left side view showing the configuration of the vehicle subframe in the present embodiment. FIG. 4 is a partial perspective view showing the configuration of the cross member and the vehicle body mounting member of the vehicle subframe in the present embodiment. FIG. 5 is a cross-sectional view taken along the line AA of FIG. FIG. 6 is a cross-sectional view taken along the line BB of FIG. FIG. 7 is a schematic plan view corresponding to FIG. 1 for showing the arrangement of a plurality of through holes of the rear members of the vehicle subframe in the present embodiment.

Hereinafter, the vehicle subframe according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7 as appropriate. In the figure, the x-axis, y-axis, and z-axis form a three-axis Cartesian coordinate system. Further, the positive direction of the x-axis is the left direction of the vehicle body, the positive direction of the y-axis is the front direction of the vehicle body, and the positive direction of the z-axis is the upward direction of the vehicle body. Further, the direction of the x-axis may be referred to as a width direction or a lateral direction, the direction of the y-axis may be referred to as a front-back direction, and the direction of the z-axis may be referred to as a vertical direction.

1 to 3 are a plan view, a bottom view, and a left side view showing the configuration of the vehicle subframe in the present embodiment, respectively. FIG. 4 is a partial perspective view showing the configuration of the cross member and the vehicle body mounting member of the vehicle subframe in the present embodiment. 5 and 6 are a cross-sectional view taken along the line AA and a cross-sectional view taken along the line BB of FIG. 1, both of which are vertical cross-sectional views taken along a plane parallel to the yz plane formed by the y-axis and the z-axis. Further, FIG. 7 is a schematic plan view corresponding to FIG. 1 for showing the arrangement of a plurality of through holes of the rear members of the vehicle subframe in the present embodiment. In addition, in FIGS. 3 to 6, for convenience of explanation, a part of the right component of the vehicle subframe is shown in parentheses, if necessary, together with the code of the right component.

As shown in FIGS. 1 to 7, the subframe 1 is not shown, but the suspension arm and the like are mounted on the vehicle body such as the front side frame defining the front engine bay of the vehicle such as an automobile. I support it. The subframe 1 is typically a plane parallel to the yz plane and has a shape symmetrical (plane symmetric) with respect to a plane passing through a center line running in the front-rear direction in the center of the width direction of the vehicle body. Have.

Although the details of the subframe 1 will be described later, the parts to be mounted on the vehicle body include the first vehicle body mounting portion A1, the second vehicle body mounting portion A2, the third vehicle body mounting portion A3, and the fourth vehicle body mounting portion A4. Six locations, a fifth vehicle body mounting portion A5 and a sixth vehicle body mounting portion A6, are set, and the first support portion S1, the second support portion S2, the third support portion S3, and the fourth support portion are set as parts for supporting the suspension arm. Four places of S4 are set.

Further, in the subframe 1, mounting portions for mounting various external force applying parts are set, and the details of the various mounting portions are described later, but the steering gear box left mounting portion A7 and the steering are used. Examples thereof include a gearbox right mounting portion A8, a torque rod mounting portion A9, a stabilizer left mounting portion A10, and a stabilizer right mounting portion A11.

Specifically, the subframe 1 mainly includes a cross member 10 extending in the width direction and a left mounting member 60 connected to the cross member 10 and arranged on the left end side thereof. , Connected to the right mounting member 80 connected to the cross member 10 and arranged on the right end side thereof, and connected to the cross member 10, the left mounting member 60 and the right mounting member 80, and extending in the front-rear direction. A pair of side members arranged opposite each other in the width direction, the left side member 110 and the right side member 130, the cross member 10, the left mounting member 60 and the right mounting member 80, and the left side member 110 and the right side member. After being connected to 130 and arranged on the rear side of the cross member 10, the rear upper member 150, which is a constituent member on the upward side of the rear member, and the cross member 10, the left side member 110, and the right side member 130 are lined up. It is connected to the upper member 150 and is disposed on the lower side of the rear upper member 150 facing the rear upper member 150, and includes a rear lower member 180 which is a constituent member on the lower side of the rear member. Each of these members is typically obtained by press-molding a single flat plate member such as a steel plate, and is in a state where the overlapped portion or the abutted portion of each is correspondingly abutted. The subframe 1 basically has a closed cross-sectional shape by being welded and integrated by plug welding, arc welding, or the like. Representative examples of welded portions of these members are shown by reference numerals WE in FIGS. 1 to 4, and although not shown in FIGS. 5 and 6, the welded portion corresponds to a portion where the members overlap each other. It is set, and in FIG. 7, the welded portion is the same as that in FIG. 1, although not shown. Further, both the rear upper member 150 and the rear lower member 180, or the rear lower member 180 may be omitted if it is not required in terms of component layout, strength, or the like.

The cross member 10 is arranged so as to extend in the width direction while facing the lateral upper member 12 extending in the width direction and facing the lateral upper member 12 on the lower side of the lateral upper member 12, and is typically the lateral upper member 12. In particular, the lateral lower member 32 integrated by being welded by arc welding or the like is provided. Further, the cross member 10 basically exhibits a convex shape that is convex in the forward direction in a cross section (longitudinal cross section) in a plane parallel to the yz plane by the lateral upper member 12 and the lateral lower member 32 that are integrated with each other. ing. Although the formability becomes complicated, if necessary, the horizontal upper member 12 and the horizontal lower member 32 are not plate members such as two separate steel plates but a single plate member such as a steel plate. It may be molded from.

Specifically, the horizontal upper member 12 is a plate member that closes the upward and forward sides of the cross member 10, and has an upper wall portion 14 and a front vertical wall portion 16. The upper wall portion 14 is provided over the entire length of the lateral upper member 12 in the width direction, but the front vertical wall portion 16 has a portion substantially disappearing at both left and right ends of the lateral upper member 12 in the width direction. It may be done.

The upper wall portion 14 has an overhanging portion 18 projecting in the rearward direction in an intermediate portion in the width direction thereof. A through hole 20 is formed in the upper wall portion 14 at the portion in the width direction corresponding to the overhanging portion 18.

A mount bracket 22 for mounting a mounting member such as a torque rod, which is not shown, is provided so as to cover the portion of the upper wall portion 14 corresponding to the overhanging portion 18 on the upward side thereof. To torque. The mount bracket 22 is typically obtained by press-molding a single flat plate member such as a steel plate, and basically exhibits an upwardly convex convex shape. A through hole 25 penetrating the top 24 is formed in the flat top 24 of the mount bracket 22 corresponding to the through hole 20 of the upper wall portion 14, and the through hole 25 is upward from the top 24. The nut 26 is fixed so as to stand upright toward the surface. Further, the hem portion 28 provided so as to surround the periphery of the top portion 24 of the mount bracket 22 is welded to the upper wall portion 14 in response to the upper wall portion 14, typically by arc welding or the like, whereby the mount bracket 22 is welded. Is connected to and integrated with the cross member 10.

The horizontal lower member 32 is a plate member that closes the lower side and the front side of the cross member 10, and has a bottom wall portion 34 and a front vertical wall portion 36. The bottom wall portion 34 and the front vertical wall portion 36 are provided over the entire length of the lateral lower member 32 in the width direction.

The bottom wall portion 34 has an overhanging portion 38 that protrudes in the rearward direction corresponding to the overhanging portion 18 of the lateral upper member 12 in the intermediate portion in the width direction thereof. In the bottom wall portion 34 in the portion in the width direction corresponding to the overhanging portion 38, a through hole (not shown) penetrating the bottom wall portion 34 is formed corresponding to the through hole 20 of the lateral upper member 12.

Here, a left opening end 40 for mounting a left suspension member (not shown) is provided at the left end of the cross member 10, and a right suspension member (not shown) is provided at the right end of the cross member 10. A right opening end 50 for mounting is provided. That is, the left open end 40 and the right open end 50 are set at both ends of the cross member 10 in the width direction.

At the left end of the cross member 10, the front vertical wall portion 16 of the horizontal upper member 12 has substantially disappeared, so that the upper wall portion 14 of the horizontal upper member 12 and the bottom wall portion 34 and the front vertical wall of the horizontal lower member 32 are substantially eliminated. The left opening end 40 is defined as a rectangular opening end in the left side view surrounded by the portion 36 and the left front member 64 of the left mounting member 60. At the left open end 40, the front vertical wall portion 36 of the horizontal lower member 32 and the left front member 64 of the left mounting member 60 both face each other at the flat plate portion, and the front vertical wall portion 36 facing the left opening member 32 in this way has a front vertical wall portion 36. A through hole 41 penetrating the through hole 41 is formed, and the nut 42 is fixed to the through hole 41 so as to stand upright from the front vertical wall portion 36 in the forward direction. In the portion of the left front member 64 of the left mounting member 60 facing the front vertical wall portion 36, a through hole 43 penetrating the left front member 64 is formed corresponding to the through hole 41 of the front vertical wall portion 36.

The configuration related to the right opening end portion 50 defined at the right end portion of the cross member 10 is a plane parallel to the yz plane with respect to the configuration related to the left opening end portion 40 and is in the width direction of the vehicle body. Since it is symmetrical with respect to the plane passing through the center line running in the front-rear direction in the center of the above, a detailed description thereof will be omitted, but the right opening end portion 50 is the upper wall portion 14 of the lateral upper member 12. , The bottom wall portion 34 and the front vertical wall portion 36 of the horizontal lower member 32, and the right front member 84 of the right mounting member 80, and correspond to the through hole 41, the nut 42, and the through hole 43 in the left opening end portion 40. It is an open end portion having a through hole 51, a nut 52, and a through hole 53 and having a rectangular shape when viewed from the right side.

Further, on the left and right ends of the cross member 10 in the width direction, there is a pair of mounting members for mounting the subframe 1 to the vehicle body in a manner corresponding to the left opening end 40 and the right opening end 50. The left mounting member 60 and the right mounting member 80 are arranged correspondingly.

The left mounting member 60 is basically a left rear member 62 arranged on the left end side of the cross member 10 while projecting upward, and a front side and a left side of the left rear member 62. A left front member 64 arranged on the front side with respect to the left rear member 62 and a left bracket arranged on the left end of the left rear member 62 and the left front member 64 so as to cover a part of the open portion. A 74 and a left fixing member 76 fixed to the left rear member 62 and the left front member 64 via the left bracket 74 are provided. Each of these members is typically obtained by press-molding a single flat plate member such as a steel plate. The left rear member 62, the left front member 64, and the left bracket 74 are typically welded and integrated by arc welding or the like. The left fixing member 76 is fastened and fixed to the left rear member 62 and the left front member 64 via the left bracket 74 by using bolts 77, and the left fixing member 76 is fixed to the vehicle body mounting bolt (not shown). A through hole 78 is formed through which the bolt is inserted. Although the formability becomes complicated, if necessary, the left rear member 62 and the left front member 64 are made of a single plate member such as a steel plate instead of a separate plate member such as two steel plates. It may be molded.

Specifically, the bottom wall portion 65, which is the downward side portion of the left front member 64, is on the upward side of the bottom wall portion 34 of the lateral lower member 32 of the cross member 10, and the overlapping portion abuts on the bottom wall portion 34. It is welded by plug welding or arc welding. The portion of the left front member 64 provided with the through hole 43 is a vertical wall portion as a flat plate portion facing the flat plate portion provided with the through hole 47 in the front vertical wall portion 36 of the lateral lower member 32 of the cross member 10. 66. The lower lower end portion 63 of the left rear member 62 is welded to the upper end side of the bottom wall portion 34 of the lateral lower member 32 of the cross member 10 via the reinforcing plate ML by arc welding or the like. .. The left rear member 62 is complicated in formability, but if necessary, the reinforcing plate ML is omitted and the cross member 10 is directly welded to the bottom wall portion 34 of the lateral lower member 32 by arc welding or the like. It may have a shape to be welded.

The configuration related to the right mounting member 80 disposed on the right end side of the cross member 10 is a plane parallel to the yz plane with respect to the configuration related to the left mounting member 60 and is in the width direction of the vehicle body. Since it is symmetrical with respect to the plane passing through the center line running in the front-rear direction in the center of the right mounting member 80, the detailed description thereof will be omitted, but the right mounting member 80 is the left rear member 62 and the lower end of the left mounting member 60. The right rear member 82, the lower end 83, corresponding to the portion 63, the reinforcing plate ML, the left front member 64, the bottom wall portion 65, the vertical wall portion 66, the left bracket 74, the left fixing member 76, the bolt 77 and the through hole 78, It has a reinforcing plate MR, a right front member 84, a bottom wall portion 85, a vertical wall portion 86, a right bracket 94, a right fixing member 96, a bolt 97, and a through hole 98.

The left side member 110 is arranged with the upper left member 112, which is a plate member extending in the front-rear direction on the left side while basically exhibiting an upwardly convex convex shape, and the upper left member 112 facing the upper left member 112 on the lower side. It is provided with a lower left member 118, which is a plate member that is provided and basically has a convex shape that is convex downward and extends in the front-rear direction. These members are typically welded together by corresponding welding such as arc welding. In the left side member 110, the formability becomes complicated, but if necessary, the upper left member 112 and the lower left member 118 are not two separate plate members such as steel plates, but a single one. It may be formed from a plate member such as a steel plate or a tubular member.

Specifically, the upper left member 112 has a through hole 113 at its front end and a connecting portion 114 at its rear end. The connection portion 114 is welded to the front vertical wall portion 36 of the lateral lower member 32 of the cross member 10 from the front side, typically by arc welding or the like, so that the upper left member 112 is a cross member. It is integrated with 10. Further, the upper left member 112 has a recess 116 whose upper surface is recessed downward on the front side adjacent to the connecting portion 114.

The lower left member 118 has a front end portion facing the front end portion of the upper left member 112 on the downward side and a rear end portion facing the rear end portion of the rear upper member 150 on the downward side, and has a lateral lower portion of the cross member 10. It extends in the front-rear direction while being in contact with the bottom wall portion 34 of the member 32 on the downward side thereof. The lower left member 118 has a through hole 119 at its front end, and has through holes 121, 122, 123, and 124 in order from the through hole 119 in the rear direction. The through hole 119 faces the lower side of the through hole 113 of the upper left member 112, and corresponds to the through hole 113 and the through hole 119, and is typically a metal cylinder inside the left side member 110. A collar member, which is a member and is not shown, is fixedly attached. The lower left member 118 is integrated with the cross member 10 by being welded to the lower side of the bottom wall portion 34 of the lateral lower member 32 of the cross member 10 by plug welding, arc welding, or the like. .. Further, the lower left member 118 is welded by arc welding or the like with the portion of the left rear member 62 and the left front member 64 of the left mounting member 60 that protrudes from the lateral lower member 32 of the cross member 10 without overlapping. As a result, the cross member 10 is integrated with the left mounting member 60. The recess 116 of the upper left member 112 and the corresponding lower left member 118 cooperate to form a fragile portion, which is typically vulnerable due to the impact force applied to the left side member 110 during a frontal collision of the vehicle. The portion can be deformed in a required deformation mode such that the portion is crushed in the front-rear direction and bends downward. The lower left member 118 is composed of a single plate member such as a steel plate, but may be configured by connecting a plurality of plate members such as steel plates divided in the middle of the front-rear direction, if necessary. .. Further, the plurality of plate members may have different plate thicknesses.

The configuration related to the right side member 130 arranged on the right side of the left side member 110 so as to face it in the width direction is a plane parallel to the yz plane with respect to the configuration related to the left side member 110. Since it is symmetrical with respect to the plane passing through the center line running in the front-rear direction in the center of the width direction of the vehicle body, detailed description thereof will be omitted, but the upper left member 112 and the through hole 113 of the left side member 110 will be omitted. , Connection portion 114, recess 116, lower left member 118, through hole 119, 121, 122, 123 and 124, upper right member 132, through hole 133, connection portion 134, recess 136, lower right member 138, through hole. It has 139, 141, 142, 143 and 144.

In the rear upper member 150, the intermediate portion of the front end extending in the width direction overlaps the rear end portion of the upper wall portion 14 of the lateral upper member 12 of the cross member 10 from the upward side thereof, and the left end portion thereof is the left mounting member. The left rear member 62 and the left front member 64 of 60 are overlapped with each other from the upward side, and the right end thereof is overlapped with the right rear member 82 and the right front member 84 of the right mounting member 80 from the upward side. In addition, the left and right ends extending in the front-rear direction are plate members that overlap with the upper left end of the lower left member 118 of the left side member 110 and the upper right end of the lower right member 138 of the right side member 130. be. In this way, the overlapping portion of the rear upper member 150 is typically welded correspondingly by arc welding or the like, so that the rear upper member 150 has a cross member 10, a left mounting member 60, a right mounting member 80, and a left side member 110. And is integrated with the right side member 130. Further, in the rear upper member 150, the rear end portion extending in the width direction is welded to the rear lower member 180, typically by arc welding or the like.

Specifically, the rear upper member 150 has a front beam-shaped portion 152 that exhibits an upwardly convex convex shape at its front end extending in the width direction, and is convex upward at its rear end extending in the width direction. It has a rear beam-shaped portion 154 that exhibits a convex shape of. The front beam shape portion 152 and the rear beam shape portion 154 are each a shape portion extending in the width direction while exhibiting a convex shape that is basically convex in the upward direction. Nuts 67 and 87 that stand up upward are fixedly attached to the sides of both ends of the front beam shape portion 152 in the width direction. The nuts 67 and 87 are for mounting one of a plurality of fixing portions of the steering gear box (not shown) correspondingly, and the front beam shape portion 152 corresponds to the nuts 67 and 87. , Through holes 155 and 156 are provided. The left rear member 62 and the left front member 64 of the left mounting member 60, and the right rear member 82 and the right front member 84 of the right mounting member 80 are typically welded to the front beam shape portion 152 by arc welding or the like. As a result, the left mounting member 60 and the right mounting member 80 are also integrated with the rear upper member 150. The overhanging portion 18 of the lateral upper member 12 in the cross member 10 is welded to the front beam shape portion 152, typically by arc welding or the like, so that the cross member 10 is also integrated with the rear upper member 150. There is. Further, the rear portion of the hem portion 28 of the mount bracket 22 is typically welded to the front beam shape portion 152 by arc welding or the like, so that the mount bracket 22 is also integrated with the rear upper member 150. ing.

The rear upper member 150 further has through holes 157 and 158 at the left and right ends of the front beam shape portion 152, and through holes 159 and 160 corresponding to the rear side of the through holes 157 and 158. prepare. Between the through holes 157 and 159, and between the through holes 158 and 160, a stabilizer bar (not shown) is freely inserted in the width direction while being formed by retracting a part of the rear upper member 150 in the downward direction. Grooves 162 and 164 are provided correspondingly. The rear upper member 150 further has through holes 165 and 166 on the rear side of the through hole 159 and through holes 167 and 168 on the rear side of the through hole 160. Left through holes 157, 159, 165 and 166 are provided corresponding to through holes 121, 122, 123 and 124 of the lower left member 118 of the left side member 110 and typically correspond to these through holes. Is a metal tubular member to which a collar member is arranged, but illustration is omitted except for the collar member 169 arranged for the through hole 166. Similarly, the right through holes 158, 160, 167 and 168 are provided corresponding to the through holes 141, 142, 143 and 144 of the lower right member 138 of the right side member 130, and correspond to these through holes. Typically, it is a metal tubular member and a collar member is arranged, but illustration is omitted except for the collar member 170 arranged for the through hole 168. Further, the through hole 166 and the collar member 169, and the through hole 168 and the collar member 170 are arranged so as to correspond to the left and right end portions of the rear beam shape portion 154.

The rear lower member 180 facing the rear upper member 150 on the downward side has its front end extending in the width direction overlapping the lower rear end of the cross member 10 in the vertical direction, and its left and right extending in the front-rear direction. Is a plate member whose end portions are vertically overlapped with each other corresponding to the lower right end portion of the left side member 110 and the lower left end portion of the right side member 130. In this way, the overlapping portion of the rear lower member 180 is typically welded correspondingly by arc welding or the like, so that the rear lower member 180 is integrated with the cross member 10, the left side member 110, and the right side member 130. ing. Further, in the rear lower member 180, the rear end extending in the width direction is typically welded to the rear end of the rear upper member 150 by arc welding or the like, whereby the rear lower member 180 becomes the rear upper member 150. It is integrated. Further, in the portion surrounded by the cross member 10, the lower left member 118 of the left side member 110, the lower right member 138 of the right side member 130, the rear upper member 150 and the rear lower member 180, holes and the like are formed, but they are practical. A closed cross section will be defined.

Here, in the subframe 1, the straight line L1 connecting the first support portion S1 and the fourth support portion S4 and the straight line L2 connecting the second support portion S2 and the third support portion S3 intersect at the intersection P1 and also. It defines the first region R1, the second region R2, the third region R3, and the fourth region R4 in a plan view. Here, the intersection P1 is a plane parallel to the xz plane and exists on the center line running in the longitudinal direction at the center in the width direction of the vehicle body. Further, in a plan view, the rear upper member 150 and the rear lower member 180 are formed by a straight line L1 connecting the first support portion S1 and the fourth support portion S4 and a straight line L2 connecting the second support portion S2 and the third support portion S3. The first region R1 extending to the left from the intersection P1 formed by the straight line L1 and the straight line L2, the second region R2 extending to the right from the intersection P1, and the third region R3 extending from the intersection P1 to the front side. It is assumed that the fourth region R4 extending from P1 toward the rear side is defined.

The rear upper member 150 and the rear lower member 180 have a first region R1 and a second region so as to leave a skeleton portion having a vertical cross section exhibiting a required height in the vertical direction on the subframe 1 along the straight lines L1 and L2. It has through holes HL, HR and HC that are narrowed so as to penetrate in the vertical direction corresponding to R2 and the fourth region R4. That is, the through hole HL is arranged in the first region R1, the through hole HR is arranged in the second region R2, and the through hole HC is arranged in the fourth region R4. Further, the rear upper member 150 has a surface portion SP1 having a predetermined width W1 in the width direction and extending in the front-rear direction between the end portions adjacent to each other in the width direction of the through hole HL and the through hole HC, and has a through hole. Between the adjacent ends of the HR and the through hole HC in the width direction, there is a surface portion SP2 having a predetermined width W1 in the width direction and extending in the front-rear direction, and in the front-back direction of the through hole HL and the through hole HC. It has a surface portion SP3 having a predetermined width W2 in the front-rear direction and extending in the width direction between adjacent ends thereof and between the end portions adjacent to each other in the front-rear direction of the through-hole HR and the through-hole HC. The surface portions SP1 and SP2 connect the front beam shape portion 152 and the rear beam shape portion 154 to each other, and the surface portion SP3 connects the surface portions SP1 and SP2 to each other. Further, from the viewpoint of balancing the stress at the peripheral ends of the through holes HL, HR and HC and suppressing unnecessary stress concentration in the rear upper member 150 and the rear lower member 180, the through holes HL and HR are described. The length of the peripheral end portion on the front side close to the front beam shape portion 152 in the vehicle width direction is set longer than the length of the peripheral end portion in the vehicle width direction on the rear side. It is preferable to set the length of the peripheral end portion on the rear side close to the beam shape portion 154 in the vehicle width direction to be longer than the length of the peripheral end portion in the vehicle width direction on the front side. When the rear lower member 180 is omitted, only the rear upper member 150 may be constricted to provide through holes HL, HR, and HC.

In the above configuration, among the various parts where the subframe 1 is mounted on the vehicle body, the left front first vehicle body mounting portion A1 includes a through hole 113 provided in the upper left member 112 of the left side member 110 and a left side member 110. The through hole 119 provided in the lower left member 118 of the above and the collar member provided corresponding to these and omitted from the illustration correspond to the second vehicle body mounting portion A2 in the front right of the right side member 130 in the upper right member 132. The through hole 133 provided, the through hole 139 provided in the lower right member 138 of the right side member 130, and the corresponding collar member (not shown) correspond to the third vehicle body mounting portion in the left. The A3 corresponds to the through hole 78 provided in the left fixing member 76 of the left mounting member 60, and the fourth vehicle body mounting portion A4 in the right corresponds to the penetration provided in the right fixing member 96 of the right mounting member 80. The hole 98 corresponds to the fifth vehicle body mounting portion A5 on the left rear side, which includes a through hole 124 provided in the lower left member 118 of the left side member 110, a through hole 166 provided in the rear upper member 150, and corresponding to these. The provided collar member 169 corresponds to this, and as the sixth vehicle body mounting portion A6 on the right rear side, the through hole 144 provided in the lower right member 138 of the right side member 130 and the through hole 168 provided in the rear upper member 150. And the color member 170 provided corresponding to these corresponds. The third vehicle body mounting portion A3 and the fourth vehicle body mounting portion A4 are connected in the width direction via the front beam shape portion 152 of the rear upper member 150, and the fifth vehicle body mounting portion A5 and the sixth vehicle body mounting portion A6 are rear upper members. It is connected in the width direction via the rear beam shape portion 154 of 150. All of these parts are typically parts for fastening using a fastening member such as a bolt. Further, as these parts, an example in which a rigid structure in which the subframe mount member is interposed is assumed is assumed, but a floating structure in which the subframe mount member is interposed may be adopted.

Further, among various parts in which the subframe 1 supports the inner pivot portion of the suspension arm, the left front first support portion S1 is a left opening end having a through hole 41, a nut 42, and a through hole 43 in the cross member 10. The portion 40 corresponds to (in FIG. 7, it is shown as the midpoint of the axis connecting the through holes 41 and 43), and the second support portion S2 on the front right is the through hole 51, the nut 52, and the through hole in the cross member 10. The right open end 50 having 53 corresponds to it (in FIG. 7, it is shown as the midpoint of the axis connecting the through holes 51 and 53), and the third support S3 on the left rear is the lower left of the left side member 110. The through hole 123 provided in the member 118, the through hole 165 provided in the rear upper member 150, and the color member provided corresponding to these and omitted from the illustration correspond to the through hole 165 (in FIG. 7, the plan view of the through hole 165). As the fourth support portion S4 on the right rear side, the through hole 143 provided in the lower right member 138 of the right side member 130, the through hole 167 provided in the rear upper member 150, and these. Correspondingly, a collar member (not shown) is provided (in FIG. 7, it is shown as a center point of the through hole 167 in a plan view). The first support portion S1 and the second support portion S2 are connected in the width direction via the front beam shape portion 152 of the rear upper member 150, and the third support portion S3 and the fourth support portion S4 are connected to the rear beam of the rear upper member 150. It is connected in the width direction via the shape portion 154 and the third surface portion SP3. All of these parts are typically parts for fastening using a fastening member such as a bolt. Further, although an example in which an L-type lower arm is adopted as the suspension arm applied to these parts is assumed, an A-type lower arm or two I-type lower arms may be adopted. Further, assuming an example in which the inner cylinders of the insulator bush members (not shown) are fastened to the first support portion S1 on the left front and the second support portion S2 on the right front, the third support portion S3 on the left rear and the right rear are assumed. Although not shown in the fourth support portion S4 of the above, it is assumed that the brackets are fastened to each other and the insulator bush member is attached to the brackets.

Further, among the various mounting portions on which the subframe 1 mounts various external force applying parts, the nut 67 and the through hole 155 provided in the rear upper member 150 correspond to the steering gear box left mounting portion A7, and the steering gear box. The right mounting portion A8 corresponds to the nut 87 and the through hole 156 provided in the rear upper member 150, and the torque rod mounting portion A9 corresponds to the overhanging portion 18 and the penetrating portion provided in the lateral upper member 12 of the cross member 10. The hole 20, the overhanging portion 38 provided in the lateral lower member 32 of the cross member 10, the through hole (not shown), and the through hole 25 and the nut 26 provided in the mount bracket 22 correspond to the stabilizer left mounting portion A10. The through holes 121 and 122 provided in the lower left member 118 of the left side member 110, the through holes 157 and 159 provided in the rear upper member 150, and the color members provided corresponding to these and not shown are omitted. Correspondingly, the stabilizer right mounting portion A11 is provided with through holes 141 and 142 provided in the lower right member 138 of the right side member 130, through holes 158 and 160 provided in the rear upper member 150, and corresponding to these. Corresponding to a color member which is omitted from the illustration. All of these parts are typically parts for fastening using a fastening member such as a bolt. Further, assuming an example in which the left and right mounting seats of the steering gear box body are correspondingly fastened in the steering gear box left mounting portion A7 and the steering gear box right mounting portion A8, in the torque rod mounting portion A9, the engine transmission is assumed. Assuming an example in which the inner cylinder of the mount member of the system is fastened, and in the stabilizer left mounting portion A10 and the stabilizer right mounting portion A11, although not shown, the brackets are fastened to the bracket and the bush member. It is assumed that the stabilizer bar is attached via the above.

In the subframe 1 of the present embodiment described above, the vehicle subframe 1 is the first side member 110, the second side member 130, the cross member 10, the first vehicle body mounting member 60, and the second. A vehicle body mounting member 80 is provided, and the first side member 110 is a first front vehicle body mounting portion A1 on the front side in the front-rear direction and a first rear vehicle body mounting portion A5 on the rear side in the front-rear direction. The second side member 130 has a second front vehicle body mounting portion A2 on the front side and a second rear vehicle body mounting portion A6 on the rear side, and the first side member 110 and The second side member 130 has a configuration in which the second side member 130 is in contact with the cross member 10 and is welded to the cross member 10, and the first vehicle body mounting member 60 is a first front vehicle body mounting portion A1 and a first. The first side member 110 and the cross member have a first middle body mounting portion A3 located between the rear vehicle body mounting portions A5 and are in contact with the first side member 110 and the cross member 10. A second middle vehicle body mounting portion A4 having a configuration welded to 10 and having a second vehicle body mounting member 80 located between the second front vehicle body mounting portion A2 and the second rear vehicle body mounting portion A6. The main of the vehicle subframe 1 because it has a configuration in which the second side member 130 and the cross member 10 are welded to the second side member 130 and the cross member 10 in a manner of being in contact with the second side member 130 and the cross member 10. In an embodiment in which the constituent materials are uniformly applied to the press-molded product, the cross member 10, the first vehicle body mounting member 60, and the second vehicle body mounting member are attached to the first side member 110 and the second side member 130. Since the 80s are correspondingly directly welded and integrated, the strength and rigidity of the vehicle subframe 1 can be increased, and the impact force typically applied at the time of a frontal collision of the vehicle can be increased. Vehicle subs are reliably distributed and transmitted from the first side member 110 and the second side member 130 to the cross member 10, the first vehicle body mounting member 60, and the second vehicle body mounting member 80. The collision performance of the frame 1 can be improved.

Further, in the subframe 1 of the present embodiment, the cross member 10 has a first end portion and a second end portion which are both ends in the width direction of the cross member 10, and the first side member 110 and the second end portion. On the upward side of the side member 130, the first end and the second end are the first side member in a manner corresponding to the first side member 110 and the second side member 130. It has a structure welded corresponding to the 110 and the second side member 130, and the first vehicle body mounting member 60 hits the first side member 110 on the upward side of the first side member 110. The cross member is welded in contact with the first side member 110 and in contact with the first end on the upward side of the first end of the cross member 10. The second side member has a configuration welded to 10 and the second vehicle body mounting member 80 abuts on the second side member 130 on the upward side of the second side member 130. It is welded corresponding to 130 and has a configuration welded to the cross member 10 in such a manner that it is in contact with the second end on the upward side of the second end of the cross member 10. Therefore, the collision performance of the vehicle subframe 1 can be enhanced, and the support strength and rigidity of the suspension arm and the engine mount in the vehicle subframe 1 and the mounting strength and rigidity of the vehicle subframe to the vehicle body can be increased. ..

Further, in the subframe 1 of the present embodiment, the cross member 10 is arranged on the rear side in the front-rear direction, and the first side member 110, the second side member 130, the cross member 10, and the first side member 10. The first side member 110, the second side member 130, the cross member 10, the first vehicle body mounting member 60, and the second vehicle body mounting member 80 are in contact with each of the vehicle body mounting member 60 and the second vehicle body mounting member 80. Since it has a structure welded to each of the vehicle body mounting members 80 and further includes rear members 150 and 180 made of plate members, the support strength, rigidity, and vehicle support of the steering gear box and stabilizer in the vehicle subframe 1 It is possible to increase the mounting strength and rigidity of the subframe 1 to the vehicle body.

Further, in the subframe 1 of the present embodiment, the first open end portion defined by the first vehicle body mounting member 60 and the cross member 10 in cooperation with each other on the side of the first end portion of the cross member 10. On the side of the second end of the cross member 10, a first support S1 is configured which further comprises 40 and supports the corresponding one of the plurality of suspension arms in the first open end 40. The second vehicle body mounting member 80 and the cross member 10 further have a second opening end portion 50 defined in cooperation with each other, and the second opening end portion 50 is provided with a corresponding one among a plurality of suspension arms. A second support portion S2 to be supported is configured, is arranged on the rear side of the first support portion S1, and the first side member 110 and the rear members 150, 180 cooperate with each other to provide a plurality of suspensions. A third support portion S3 that supports the corresponding one in the arm is configured, disposed on the rear side of the second support portion S2, and the second side members 130 and rear members 150, 180 are provided. Since the fourth support portion S4 that supports the corresponding one of the plurality of suspension arms is configured in cooperation with each other, the support strength and rigidity of the suspension arm in the vehicle subframe 1 are further increased. be able to.

Further, in the subframe 1 in the present embodiment, a straight line L1 connecting the first support portion S1 and the fourth support portion S4 and a straight line L2 connecting the second support portion S2 and the third support portion S3 are used. A plurality of regions R1 to R4 are defined in the rear members 150 and 180 in a plan view, and the plurality of regions R1 to R4 are first regions extending from the intersection P1 formed by the straight lines L1 and L2 toward one side in the width direction. R1, a second region R2 extending from the intersection P1 toward the other side in the width direction, a third region R3 extending from the intersection P1 toward the front side, and extending from the intersection P1 toward the rear side. The rear members 150 and 180 have a fourth region R4, and the rear members 150 and 180 have a first hole HL, a second hole HR, and a third hole in the first region R1, the second region R2, and the fourth region R4. Since the subframe 1 for a vehicle has a portion HC correspondingly, the weight can be further reduced in an aspect in which the strength, rigidity and collision performance of the subframe 1 for a vehicle are enhanced.

Further, in the subframe 1 of the present embodiment, the width W1 is exhibited in the width direction and extends in the front-rear direction between the adjacent ends of the first hole HL and the third hole HC in the width direction. It has a first surface portion SP1 that exists, and exhibits a width W1 in the width direction and extends in the front-rear direction between adjacent ends of the second hole portion HR and the third hole portion HC in the width direction. It has a second surface portion SP2, and is between the adjacent ends of the first hole portion HL and the third hole portion HC in the front-rear direction, and is between the second hole portion HL and the third hole portion HC. Since the rear members 150 and 180 have a third surface portion SP3 that exhibits a width W2 in the front-rear direction and extends in the width direction between the end portions adjacent to each other in the front-rear direction, the first surface portion SP1 is provided. And the second surface portion SP2 can be connected to the high-rigidity portions 152 and 154 other than the first hole portion HL, the second hole portion HR and the third hole portion HC, and the first surface portion SP1. Since the second surface portion SP2 can be connected by the third surface portion SP3, the weight of the vehicle subframe 1 can be reduced without impairing its increased strength, rigidity, and collision performance.

It should be noted that the present invention is not limited to the above-described embodiment in terms of the type, shape, arrangement, number, etc. of the members, and the gist of the invention is described by appropriately substituting the constituent elements with those having the same effect. Of course, it can be changed as appropriate without deviation.

As described above, in the present invention, the vehicle subframe capable of increasing the strength and rigidity and exhibiting the required collision performance while uniformly applying the press-molded product to the main constituent material is provided. Since it can be provided, it is expected that it can be widely applied to the field of subframes of moving objects such as vehicles due to its general-purpose universal character.

1 ... Subframe 10 ... Cross member 12 ... Horizontal upper member 14 ... Upper wall part 16 ... Front vertical wall part 18 ... Overhanging part 20 ... Through hole 22 ... Mount bracket 24 ... Top 25 ... Through hole 26 ... Nut 28 ... Hem Part 32 ... Horizontal lower member 34 ... Bottom wall part 36 ... Front vertical wall part 38 ... Overhanging part 40 ... Left opening end 41 ... Through hole 42 ... Nut 43 ... Through hole 50 ... Right opening end 51 ... Through hole 52 ... Nut 53 ... Through hole 60 ... Left mounting member 62 ... Left rear member 63 ... Lower end 64 ... Left front member 65 ... Bottom wall 66 ... Vertical wall 67 ... Nut 74 ... Left bracket 76 ... Left fixing member 77 ... Bolt 78 ... Through hole 80 ... Right mounting member 82 ... Right rear member 83 ... Lower end 84 ... Right outer member 85 ... Bottom wall 86 ... Vertical wall 87 ... Nut 94 ... Right bracket 96 ... Right fixing member 97 ... Bolt 98 ... Penetration Hole 110 ... Left side member 112 ... Upper left member 113 ... Through hole 114 ... Connection part 116 ... Recessed portion 118 ... Lower left member 119 ... Through hole 121, 122, 123, 124 ... Through hole 130 ... Right side member 132 ... Upper right member 133 ... Through hole 134 ... Connection portion 136 ... Recessed portion 138 ... Lower right member 139 ... Through hole 141, 142, 143, 144 ... Through hole 150 ... Rear upper member 152 ... Front beam shape portion 154 ... Rear beam shape portion 155, 156, 157, 158, 159, 160 ... Through holes 162, 164 ... Grooves 165, 166, 167, 168 ... Through holes 169, 170 ... Color members,
180 ... Rear lower members 181, 182 ... Through holes HL, HR, HC ... Through holes SP1, SP2, SP3 ... Surface portion A1 ... First vehicle body mounting portion A2 ... Second vehicle body mounting portion A3 ... Third vehicle body mounting portion A4 ... Fourth Body mounting part A5 ... 5th body mounting part A6 ... 6th body mounting part A7 ... Steering gear box left mounting part A8 ... Steering gear box right mounting part A9 ... Torque rod mounting part A10 ... Stabilizer left mounting part A11 ... Stabilizer right mounting Part S1 ... First support part S2 ... Second support part S3 ... Third support part S4 ... Fourth support part

Claims (5)

A vehicle subframe that is mounted on the vehicle body.
A first side member and a second side member, each of which is arranged so as to face each other in the width direction of the vehicle body while extending in the front-rear direction of the vehicle body, and each of them is composed of a plate member.
A cross member made of a plate member, which is arranged so as to extend in the width direction and connects the first side member and the second side member,
On one side in the width direction, a first vehicle body mounting member formed of a plate member, which projects upward from the vehicle body with respect to the first side member and the cross member,
On the other side in the width direction, a second vehicle body mounting member formed of a plate member, which projects upward from the second side member and the cross member,
Equipped with
The first side member has a first front vehicle body mounting portion on the front side in the front-rear direction and a first rear vehicle body mounting portion on the rear side in the front-rear direction.
The second side member has a second front vehicle body mounting portion on the front side and a second rear vehicle body mounting portion on the rear side.
The first side member and the second side member have a structure welded to the cross member in a manner of contacting the cross member.
The first vehicle body mounting member has a first middle vehicle body mounting portion located between the first front vehicle body mounting portion and the first rear vehicle body mounting portion, and also has the first side member and the first vehicle body mounting portion. It has a configuration welded to the first side member and the cross member in a manner of contacting the cross member.
The second vehicle body mounting member has a second middle vehicle body mounting portion located between the second front vehicle body mounting portion and the second rear vehicle body mounting portion, and also has the second side member and the second vehicle body mounting portion. It has a configuration welded to the second side member and the cross member in a manner of contacting the cross member.
The cross member is arranged on the rear side in the front-rear direction, and the first side member, the second side member, the cross member, the first vehicle body mounting member, and the second vehicle body are arranged. Welded to each of the first side member, the second side member, the cross member, the first vehicle body mounting member, and the second vehicle body mounting member in a manner of contacting each of the mounting members. A vehicle subframe that has a configuration and further includes a rear member made of a plate member . The cross member has a first end portion and a second end portion which are both ends of the cross member in the width direction on the upward side of the first side member and the second side member. In an embodiment in which the first side member and the second side member are in contact with each other, the first end portion and the second end portion are the first side member and the second side member. Has a welded configuration corresponding to
The first vehicle body mounting member is welded corresponding to the first side member in a manner of contacting the first side member on the upward side of the first side member. The cross member has a structure welded to the cross member in a manner of contacting the first end on the upward side of the first end of the cross member.
The second vehicle body mounting member is welded corresponding to the second side member in a manner of contacting the second side member on the upward side of the second side member. The vehicle according to claim 1, wherein the cross member has a structure welded to the cross member in a manner of contacting the second end on the upward side of the second end. Sub-frame. On the side of the first end portion, the first opening end portion defined by the first vehicle body mounting member and the cross member in cooperation with each other is further provided, and a plurality of portions are provided at the first opening end portion. A first support is configured to support the corresponding of the suspension arms.
On the side of the second end portion, the second vehicle body mounting member and the cross member cooperate to define a second open end portion, and the second open end portion has the plurality of portions. A second support is configured to support the corresponding of the suspension arms of the.
A third side member and a rear member that are arranged on the rear side of the first support portion and cooperate with each other to support a corresponding one of the plurality of suspension arms. Support is configured,
A fourth side member and a rear member that are arranged on the rear side of the second support portion and cooperate with each other to support a corresponding one of the plurality of suspension arms. The vehicle subframe according to claim 2 , wherein the support portion is configured. A plurality of regions are defined for the rear member in a plan view by a straight line connecting the first support portion and the fourth support portion and a straight line connecting the second support portion and the third support portion.
The plurality of regions include a first region extending from an intersection formed by the straight lines toward the one side in the width direction, and a second region extending from the intersection toward the other side in the width direction. It has a third region extending from the intersection toward the front side, and a fourth region extending from the intersection toward the rear side.
The vehicle according to claim 3 , wherein the rear member has a first hole, a second hole, and a third hole corresponding to each other in the first region, the second region, and the fourth region. Sub-frame. The rear member has a width in the width direction and extends in the front-rear direction between the end portions of the first hole portion and the third hole portion adjacent to each other in the width direction. A second surface portion having a width in the width direction and extending in the front-rear direction between the end portions of the second hole portion and the third hole portion adjacent to each other in the width direction. In the anteroposterior direction of the second hole and the third hole between the adjacent ends of the first hole and the third hole in the anteroposterior direction. The vehicle subframe according to claim 4 , wherein a third surface portion having a width in the front-rear direction and extending in the width direction is provided between adjacent ends.

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