JP5125440B2 - Power unit support structure - Google Patents

Description

  The present invention relates to a power unit support structure in which a sub-frame member supports a power unit such as an engine via a support member disposed below the power unit.

Conventionally, as a power unit support structure in which a subframe member supports a power unit including an engine or the like via a support member disposed below the power unit, for example, a configuration as described in Patent Document 1 There is.
The power unit support structure described in Patent Document 1 includes a subframe member and a support member.

The sub-frame members are arranged side by side in the longitudinal direction of the vehicle body, and both ends of two cross members extending in the vehicle width direction are connected to a pair of left and right side members extending in the longitudinal direction of the vehicle body. Forming.
The support member includes a plurality of mounting brackets provided on the cross member, an engine mounting member extending substantially in the longitudinal direction of the vehicle body, a bolt for fixing the engine mounting member to the mounting bracket, and mounting legs protruding from both sides of the engine. It consists of parts.
Japanese Patent Laid-Open No. 8-164753 (FIG. 4)

However, in the power unit support structure described in Patent Document 1, since the support member is composed of a plurality of parts, there is a possibility that the manufacturing cost of the support member increases.
In addition, since the support member is composed of a plurality of parts, there is a possibility that the support member may be damaged due to damage of a member that couples the parts, and the reliability of the support member is reduced. May occur.
The present invention has been made paying attention to the problems as described above, and a power unit support structure capable of reducing the manufacturing cost of the support member and improving the reliability of the support member. The issue is to provide.

In order to solve the above problems, the present invention supports a power unit disposed above the support member on the subframe member via a support member attached to the upper surface side of the subframe member constituting the vehicle body side member. A power unit support structure,
The support member includes a power unit mounting surface for mounting the power unit, a side wall surface extending below the power unit mounting surface and continuing to the power unit mounting surface, a lower end of the side wall surface, and the sub One or two or more subframe attachment surfaces attached to the frame member are integrally formed,
The subframe mounting surface is disposed on the outer peripheral side of the power unit mounting surface rather than the side wall surface as viewed from above and below,
Inclining the side wall surface away from the power unit mounting surface as it goes from the power unit mounting surface to the subframe mounting surface ,
A power unit mounting portion capable of mounting the power unit is provided at a position different from the position where the support member is disposed on the upper surface side of the subframe member,
The power unit mounting portion is integrally formed with the subframe member,
The position where the support member is arranged on the upper surface side of the sub-frame member is set to a position corresponding to one of a power unit for a two-wheel drive vehicle and a power unit for a four-wheel drive vehicle,
The position where the power unit mounting portion is provided on the upper surface side of the sub-frame member is set to a position corresponding to the other of the power unit for the two-wheel drive vehicle and the power unit for the four-wheel drive vehicle. A power unit support structure is provided.

  According to the present invention, since the shape of the side wall surface becomes wider toward the subframe mounting surface from the power unit mounting surface, the supporting member capable of supporting the load from the power unit with a structure that can be integrally molded. It becomes possible to form.

Hereinafter, an embodiment of the present invention (hereinafter referred to as “the present embodiment”) will be described with reference to the drawings.
(Constitution)
FIG. 1 is a perspective view of the power unit support structure 1 of the present embodiment as viewed from above, and is a diagram showing the configuration of the power unit support structure 1.
As shown in FIG. 1, the power unit support structure 1 of this embodiment includes a subframe member 2 and a support member 4.
First, the configuration of the subframe member 2 will be described.
The subframe member 2 is formed in a cross beam shape as a whole, and includes a first cross member 2a, a second cross member 2b, and two side members 2c and 2d.

The first cross member 2a is a member that is attached to a vehicle body frame (not shown) and extends in the vehicle width direction, and has two protrusions that protrude forward in the vehicle front-rear direction at both ends thereof. . Therefore, the first cross member 2a is formed in a U-shape as a whole when viewed from above and below.
The first cross member 2a is made of metal as a material and constitutes a vehicle body side member. In the present embodiment, the metal forming the first cross member 2a is aluminum.

Two support members 4 are attached to the upper surface side of the first cross member 2a using support member attachment bolts 6. In FIG. 1, of the two support members 4, the support member 4 arranged on the left side in the drawing is described as a support member 4 a, and the support member 4 arranged on the right side in the drawing is It is described as a support member 4b.
In the present embodiment, the position where the support members 4a and 4b are arranged on the upper surface side of the first cross member 2a is located at a position where a power unit (not shown) including an engine or the like is a power unit for a 2WD vehicle. The position corresponding to this power unit is set.

In addition, two power unit attachment portions 8 to which the power unit can be attached are provided at positions different from the positions where the support members 4a and 4b are arranged on the upper surface side of the first cross member 2a. In FIG. 1, of the two power unit mounting portions 8, the power unit mounting portion 8 disposed on the left side in the drawing is referred to as a power unit mounting portion 8 a and the power unit mounting portion disposed on the right side in the drawing. The part 8 is described as a power unit attachment part 8b.
Each power unit attachment portion 8a, 8b is formed integrally with the subframe member 2.

  Moreover, each power unit attachment part 8a, 8b has the sub-frame side power unit attachment hole 10 which penetrates the sub-frame member 2 to an up-down direction, respectively. In FIG. 1, the subframe-side power unit mounting hole 10 included in the power unit mounting portion 8 a is described as a subframe-side power unit mounting hole 10 a. Moreover, in FIG. 1, the sub-frame side power unit attachment hole 10 which the power unit attachment part 8b has is described as the sub-frame side power unit attachment hole 10b.

Each of the sub-frame side power unit mounting holes 10a and 10b is formed in a shape into which a fastening member (not shown) such as a bolt can be inserted. The fastening member is a member used when the power unit is supported on the subframe member 2 without the support member 4 interposed therebetween.
In the present embodiment, on the upper surface side of the sub-frame member 2, the position where the power unit mounting portions 8a and 8b are provided is set to a position corresponding to the power unit for 4WD vehicles. Moreover, in the following description, it describes about the case where the power unit with which the vehicle provided with the power unit support structure 1 is mounted is a power unit for 2WD vehicles.

The second cross member 2b is a columnar member extending in the vehicle width direction, and the side members 2c and 2d are fixed to both ends thereof.
Each side member 2c, 2d is a columnar member extending in the vehicle front-rear direction, and both end portions are fixed to the second cross member 2b, and the other end portion is the first cross member 2a. It is being fixed to the two protrusion parts which have, and is being fixed to the 1st cross member 2a.

Next, the configuration of the support member 4 will be described.
FIG. 2 is a diagram showing the configuration of the support member 4a, and FIG. 2 (a) is a view taken in the direction of the arrow A in FIG. 1, that is, a view of the support member 4a as viewed from above, and FIG. FIG. 2A is a view taken along the arrow B in FIG. 2A, and FIG. 2C is a view taken along the arrow C in FIG. In addition, since the support member 4a and the support member 4b have the same structure, the following description is common about the structure of the support member 4a and the support member 4b.

As shown in FIG. 2, the support member 4 includes a power unit mounting surface 12, a side wall surface 14, a subframe mounting surface 16, and a rib 18.
The power unit mounting surface 12, the side wall surface 14, and the subframe mounting surface 16 are integrally formed by casting. That is, the support member 4 is integrally formed by casting.
The support member 4 is formed using a metal as a material. In the present embodiment, the metal forming the support member 4 is aluminum as in the first cross member 2a. That is, the first cross member 2a and the support member 4 are formed of the same material.

The power unit mounting surface 12 is a surface facing the power unit.
On the upper surface of the power unit mounting surface 12, a support member side power unit mounting hole 20 penetrating the power unit mounting surface 12 is provided.
The support member side power unit mounting hole 20 is formed in a shape into which a fastening member such as a bolt can be inserted, similarly to the subframe side power unit mounting hole 10.

As described above, the power unit mounting surface 12 forms a surface for mounting the power unit among the surfaces constituting the support member 4.
The side wall surface 14 is continuous with the power unit mounting surface 12 and is formed in a shape extending downward from the power unit mounting surface 12.
Specifically, the side wall surface 14 is a surface disposed in front of the power unit mounting surface 12 in the vehicle front-rear direction, a surface disposed in the vehicle front-rear direction rearward of the power unit mounting surface 12, and a vehicle width than the power unit mounting surface 12. It is comprised from the surface arrange | positioned at the center side of a direction.

These surfaces are inclined so as to move away from the power unit mounting surface 12 from the power unit mounting surface 12 toward the subframe mounting surface 16.
As described above, the side wall surface 14 makes the power unit mounting surface 12 and the subframe mounting surface 16 continuous, and is inclined so as to move away from the power unit mounting surface 12 from the power unit mounting surface 12 toward the subframe mounting surface 16. is there.

Therefore, the shape of the side wall surface 14 is a shape that expands toward the subframe mounting surface 16 from the power unit mounting surface 12.
The subframe mounting surface 16 includes a first subframe mounting surface 16a, a second subframe mounting surface 16b, and a third subframe mounting surface 16c.
The first sub-frame mounting surface 16a, the second sub-frame mounting surface 16b, and the third sub-frame mounting surface 16c are respectively arranged on the outer peripheral side of the power unit mounting surface 12 with respect to the side wall surface 14 when viewed in the vertical direction. .

The first subframe attachment surface 16a is disposed in front of the power unit attachment surface 12 in the vehicle front-rear direction, and has a first subframe attachment hole 22a penetrating the first subframe attachment surface 16a. The first sub-frame mounting hole 22a is formed in a shape into which the support member mounting bolt 6 can be inserted.
The second subframe attachment surface 16b is disposed behind the power unit attachment surface 12 in the vehicle front-rear direction and has a second subframe attachment hole 22b that penetrates the second subframe attachment surface 16b. Similar to the first subframe mounting hole 22a, the second subframe mounting hole 22b is formed in a shape into which the support member mounting bolt 6 can be inserted.

The third subframe attachment surface 16c is disposed closer to the center in the vehicle width direction than the power unit attachment surface 12, and has a third subframe attachment hole 22c penetrating the third subframe attachment surface 16c. Similar to the first subframe mounting hole 22a, the third subframe mounting hole 22c is formed in a shape into which the support member mounting bolt 6 can be inserted.
That is, the first sub-frame mounting surface 16a, the second sub-frame mounting surface 16b, and the third sub-frame mounting surface 16c are arranged in different directions with the power unit mounting surface 12 as the center.

As described above, the subframe attachment surface 16 constitutes a surface to be attached to the subframe member 2 among the surfaces constituting the support member 4.
As described above, the power unit support structure 1 has a structure in which the power unit disposed above the support member 4 is supported by the subframe member 2 via the support member 4.
The rib 18 is formed integrally with the power unit mounting surface 12 and the side wall surface 14, and is formed on the surface of the power unit mounting surface 12 and the side wall surface 14 that faces the subframe member 2.

The rib 18 includes a first subframe side rib 18a, a second subframe side rib 18b, a third subframe side rib 18c, and two intermediate ribs 18d and 18e.
The first sub-frame side rib 18a is formed in a portion of the power unit mounting surface 12 and the side wall surface 14 that is continuous with the power unit mounting surface 12 and the first sub-frame mounting surface 16a. Thereby, the first subframe side rib 18a has a shape that suppresses bending deformation of the power unit mounting surface 12, the first subframe mounting surface 16a, and the side wall surface 14.

  The second subframe side rib 18b is formed in the power unit mounting surface 12 and the side wall surface 14 at a portion where the power unit mounting surface 12 and the second subframe mounting surface 16b are continuous. Accordingly, the second subframe side rib 18b has a shape that suppresses bending deformation of the power unit mounting surface 12, the second subframe mounting surface 16b, and the side wall surface 14.

  The third subframe side rib 18c is formed in the power unit mounting surface 12 and the side wall surface 14 in a portion where the power unit mounting surface 12 and the third subframe mounting surface 16c are continuous. Thereby, the third subframe side rib 18c has a shape that suppresses bending deformation of the power unit mounting surface 12, the third subframe mounting surface 16c, and the side wall surface 14.

The intermediate ribs 18d and 18e are portions of the power unit mounting surface 12 and the side wall surface 14 between the first subframe side rib 18a and the third subframe side rib 18c, and the second subframe side rib 18b and the second side rib 18b. It is formed in a portion between the three subframe side ribs 18c. Accordingly, the intermediate ribs 18d and 18e have a shape that suppresses bending deformation of the power unit mounting surface 12 and the side wall surface 14.
As described above, the rib 18 is configured to suppress bending deformation of the power unit mounting surface 12, the side wall surface 14, and the subframe mounting surface 16.

FIG. 3 is a view taken along the line III in FIG.
As shown in FIG. 3, a power unit side opening 24 is provided in a part of the side wall surface 14.
The power unit side opening 24 is disposed between a surface of the side wall surface 14 that is disposed in front of the power unit mounting surface 12 in the vehicle front-rear direction and a surface that is disposed in the vehicle front-rear direction rearward of the power unit mounting surface 12. It is.
The power unit side opening 24 communicates the space 26 in the support member formed by the power unit mounting surface 12, the side wall surface 14, and the subframe member 2 with the outside of the space 26 in the support member.
The opening area of the power unit side opening 24 is an area in which a tool such as a spanner used for attaching the power unit to the power unit attachment surface 12 can be arranged in the space 26 in the support member.

4 is a view taken along the line IV of FIG. 1, and FIG. 5 is a view taken along the line V of FIG.
As shown in FIGS. 4 and 5, the subframe-side opening that communicates between the space 26 in the support member and the outside of the space 26 in the support member between the subframe member 2 and the support member 4. 28 is provided.
The opening area of the sub-frame side opening 28 is an area through which foreign matter such as pebbles that have entered the space 26 in the support member can pass.

(Operation)
Next, the operation of the power unit support structure 1 of the present embodiment will be described with reference to FIGS. 1 to 5 and FIGS. 6 to 8.
6 is a diagram showing the power unit support structure 1 in a state in which the power unit P is supported, and FIG. 7 is an enlarged view of a range surrounded by a circle VII in FIG. FIG. 8 is a diagram illustrating a configuration concept of the power unit support structure 1 and is a diagram illustrating a load applied to the support member 4 in the power unit support structure 1 in a state where the power unit is supported. Moreover, in FIG. 7, illustration of the power unit P and the sub-frame member 2 is abbreviate | omitted for description. In FIG. 8, for the sake of explanation, the third subframe mounting surface 16c is omitted from the first subframe mounting surface 16a, the second subframe mounting surface 16b, and the third subframe mounting surface 16c. ing.

When the power unit P is supported by the power unit support structure 1, first, the support member 4 is attached to the upper surface side of the first cross member 2 a using the support member attachment bolt 6 (FIGS. 1, 4 to 6, 8). reference).
At this time, the space 26 in the support member communicates with the outside of the space 26 in the support member between the subframe member 2 and the support member 4, and the pebbles that have entered the space 26 in the support member A sub-frame side opening 28 having an opening area through which foreign substances such as the like can pass is provided (see FIGS. 4 and 5).

For this reason, even when a foreign object such as a pebbles enters the space 26 in the support member during traveling of the vehicle equipped with the power unit support structure 1, the foreign object enters the support member from the subframe side opening 28. (See FIGS. 4 and 5).
After the support member 4 is attached to the upper surface side of the first cross member 2a, the power unit P is attached to the power unit attachment surface 12 with the insulator 30 disposed between the power unit attachment surface 12 and the power unit P (FIG. 6). 7).

Specifically, after the insulator 30 is attached to the power unit P, the nut 34 disposed in the space 26 in the support member is attached to the power unit attachment bolt 32 inserted into the support member side power unit attachment hole 20 (FIGS. 6 and 7). reference).
At this time, a part of the side wall surface 14 is provided with a power unit side opening 24 having an opening area in which a tool such as a spanner can be disposed in the space 26 in the support member (see FIG. 3).
For this reason, it becomes easy to arrange | position the tool used when attaching a power unit to the power unit attachment surface 12 in the space 26 in a support member, and the attachment operation of the power unit P to the power unit attachment surface 12 becomes easy (FIG. 6 and 7).

  In addition, since the first cross member 2a and the support member 4 are both formed of aluminum, that is, using the same material, it is possible to suppress the occurrence of electrical corrosion at the contact surfaces of both. It has become. Further, by forming the first cross member 2a and the support member 4 using aluminum as a material, weight reduction of both is realized as compared with the case where both materials are made of carbon steel or the like.

When the support member 4 is attached to the upper surface side of the first cross member 2a and the power unit P is attached to the power unit attachment surface 12, the power unit P disposed above the support member 4 is supported by the subframe member 2 via the support member 4. (See FIGS. 6 and 7).
In this state, as shown in FIG. 8, due to the mass of the power unit, the load Lp applied to the power unit mounting surface 12 via the side wall surface 14 causes the first subframe mounting surface 16a, the second subframe mounting surface 16b, and It is transmitted to the third subframe mounting surface 16c.

At this time, the shape of the side wall surface 14 becomes a shape that becomes wider from the power unit mounting surface 12 toward the first subframe mounting surface 16a, the second subframe mounting surface 16b, and the third subframe mounting surface 16c. (See FIG. 2).
Therefore, the load Lp applied to the power unit mounting surface 12 can be distributed to the vertical load Lv and the in-plane load Lh on each of the subframe mounting surfaces 16a to 14c (see FIG. 8).

Further, the first subframe mounting surface 16a, the second subframe mounting surface 16b, and the third subframe mounting surface 16c are respectively arranged on the outer peripheral side of the power unit mounting surface 12 with respect to the side wall surface 14 when viewed in the vertical direction. (See FIG. 2).
For this reason, when the load Lp is applied to the power unit mounting surface 12 due to the mass of the power unit, the load Lc in the compression direction is applied to each of the subframe mounting surfaces 16a to 14c (see FIG. 8).

Further, the support member 4 includes a rib 18 configured to suppress bending deformation of the power unit mounting surface 12, the side wall surface 14, and the subframe mounting surface 16 (see FIG. 2).
For this reason, the bending deformation of the power unit mounting surface 12, the side wall surface 14, and the subframe mounting surface 16 in the state where the load Lp is applied to the power unit mounting surface 12 is suppressed by the mass of the power unit (see FIG. 2).

(effect)
(1) In the power unit support structure of the present embodiment, the side wall surface is inclined so as to move away from the power unit mounting surface as it goes from the power unit mounting surface to each subframe mounting surface.
For this reason, the shape of the side wall surface is a shape that spreads from the power unit mounting surface toward each subframe mounting surface.
As a result, the load applied to the power unit mounting surface can be distributed to the vertical load and the in-plane load on each subframe mounting surface, so that the support rigidity of the support member can be improved. It becomes.

Moreover, each sub-frame attachment surface is arrange | positioned in the outer peripheral side of the power unit attachment surface rather than the side wall surface seeing from the up-down direction.
For this reason, when a load is applied to the power unit mounting surface due to the mass of the power unit, a load in the compression direction is applied to each subframe mounting surface.
As a result, it is possible to suppress the occurrence of cracks in each subframe mounting surface by applying a load in the tensile direction to each subframe mounting surface due to a minute notch or cast nest. The strength and durability of the frame mounting surface can be improved.

As described above, since it becomes possible to improve the support rigidity of the support member and the strength and durability of each subframe mounting surface, the support member is integrally formed with the power unit mounting surface, the subframe mounting surface, and the side wall surface. Can be formed.
Also, by forming the support member integrally, the configuration of the support member does not have a welded portion, so it is possible to reduce the shape elements that become notches against component fatigue. Become.
As a result, the manufacturing cost of the support member can be reduced, and the reliability of the support member can be improved.

(2) Further, in the power unit support structure of the present embodiment, the first subframe mounting surface, the second subframe mounting surface, and the second subframe mounting surface are arranged in different directions with the power unit mounting surface as the center. It consists of three subframe mounting surfaces.
For this reason, when the load applied to the power unit mounting surface is applied as a load in the compression direction to each subframe mounting surface, the load is applied to each subframe mounting surface as a load in a different direction around the power unit mounting surface. Become.

As a result, the load applied to the power unit mounting surface can be efficiently dispersed, and the support rigidity of the support member and the strength and durability of each subframe mounting surface can be improved.
In addition, the sub-frame mounting surface is composed of three surfaces, each arranged in different directions with the power unit mounting surface as the center, so that even if the shape of the sub-frame member is complicated, the mounting of the support member It becomes possible to stabilize the state.

(3) Further, in the power unit support structure of the present embodiment, the support member includes a rib configured to suppress bending deformation of the power unit mounting surface, the subframe mounting surface, and the side wall surface.
For this reason, it is possible to suppress bending deformation of the power unit mounting surface, the subframe mounting surface, and the side wall surface in a state where a load is applied to the power unit mounting surface and a load in the compression direction is applied to each subframe mounting surface.
Further, it is possible to improve the surface rigidity of the power unit mounting surface, and it is possible to improve the coupling rigidity between the power unit mounting surface and the side wall surface, and between the side wall surface and the subframe mounting surface.
As a result, it is possible to improve the support rigidity of the support member.

(4) Moreover, in the power unit support structure of this embodiment, the power unit side opening part which connects the space in a support member and the exterior of the space in a support member is provided in a part of side wall surface.
Further, the opening area of the power unit side opening is set to an area where a tool such as a spanner used for mounting the power unit on the power unit mounting surface can be placed in the space in the support member.
For this reason, it becomes easy to arrange | position the tool used when attaching a power unit to a power unit attachment surface in the space in a supporting member, and the attachment operation | work of the power unit to a power unit attachment surface becomes easy.
As a result, it is possible to improve work efficiency related to the work of attaching the power unit to the power unit attachment surface, and it is possible to improve the production efficiency of the vehicle including the power unit support structure.

(5) In the power unit support structure of the present embodiment, a subframe-side opening that communicates the space in the support member and the outside of the space in the support member is provided between the support member and the subframe member. ing.
In addition, the opening area of the sub-frame side opening is an area through which foreign matter such as pebbles that have entered the space in the support member can pass.
For this reason, when a solid object such as pebbles on the road surface jumps into the space in the support member when the vehicle equipped with the power unit support structure travels, the solid object is It moves outside the space in the support member.

As a result, it is possible to suppress the solid matter that has entered the space in the support member from moving in the space in the support member and colliding with the support member and the subframe member, It becomes possible to suppress damage to the support member and the subframe member.
In addition, when a vehicle equipped with a power unit support structure travels, such as rainwater in a puddle on the road surface enters into the space in the support member, the liquid is supplied from the subframe side opening to the support member. Move outside the interior space.
As a result, the liquid that has entered the space in the support member can be prevented from staying in the space in the support member, and the support member and the subframe member can be prevented from corroding. Become.

(6) Moreover, in the power unit support structure of this embodiment, the support member is integrally formed by casting.
For this reason, it is possible to reduce the number of molds used for molding as compared with the case where the support member is formed by integral molding by press working.
This is because when the support member is formed by press working, the structure becomes deep drawing, so that it is difficult to configure with a single part, and it is necessary to connect multiple parts by welding. It is to become.

In addition, since the support member is integrally formed by casting, the thickness can be optimally distributed, so that the weight of the support member can be reduced and the material cost of the support member can be reduced. .
This is because the plate thickness is constant in press working, and therefore reducing the type of parts is a factor that has a waste of meat, which is an adverse effect of weight reduction.
As a result, it is possible to reduce the manufacturing cost of the support member.

(7) Moreover, in the power unit support structure of this embodiment, the support member and the subframe member are formed of aluminum, that is, the same material.
For this reason, generation | occurrence | production of the electric corrosion in the contact surface of a supporting member and a sub-frame member can be suppressed.
As a result, the strength and reliability of the support member and the subframe member can be improved.

(8) Moreover, in the power unit support structure of this embodiment, the power unit attachment part which can attach a power unit is provided in the position different from the position which arrange | positions a support member among the upper surface sides of a sub-frame member.
Further, the power unit mounting portion is formed integrally with the subframe member.
For this reason, unlike the power unit described above, when supporting a power unit for a 4WD vehicle, as shown in FIG. 9, the power unit for a 4WD vehicle is supported only by removing the support member from the subframe member. Is possible. FIG. 9 is a diagram showing a configuration of a power unit support structure when a power unit for a 4WD vehicle is supported.
As a result, by not attaching the support member to the subframe member without changing the configuration of the subframe member, it is possible to cope with different types of power units, and the manufacturing cost of the power unit support structure can be reduced. It becomes.

(Application examples)
(1) In the power unit support structure of the present embodiment, the subframe mounting surface 16 is composed of three surfaces, but is not limited to this. In other words, the subframe mounting surface 16 may be composed of one surface, two surfaces, or four or more surfaces.
(2) In the power unit support structure of the present embodiment, the first subframe mounting surface 16a, the second subframe mounting surface 16b, and the third subframe mounting surface 16c are different from each other with the power unit mounting surface 12 as the center. It is arranged in the direction. However, the configuration of the first subframe mounting surface 16a, the second subframe mounting surface 16b, and the third subframe mounting surface 16c is not limited to this. That is, at least two of the first subframe mounting surface 16a, the second subframe mounting surface 16b, and the third subframe mounting surface 16c may be arranged in the same direction with the power unit mounting surface 12 as a center. However, as in the present embodiment, the three subframe mounting surfaces 16 are arranged in different directions with the power unit mounting surface 12 as the center, so that the load applied to the power unit mounting surface 12 can be efficiently dispersed. Therefore, it is preferable.

(3) Further, the power unit support structure of the present embodiment includes the ribs 18 configured to suppress bending deformation of the power unit mounting surface 12, the side wall surface 14, and the subframe mounting surface 16, but the present invention is not limited thereto. Instead, the configuration may be such that the rib 18 is not provided. However, as in the present embodiment, the configuration including the ribs 18 is a bending deformation of the power unit mounting surface 12, the side wall surface 14, and the subframe mounting surface 16 in a state where the load Lp is applied to the power unit mounting surface 12. Is preferable.

(4) Further, in the power unit support structure of the present embodiment, the support member 4 includes the sub-frame side rib 18 and the intermediate rib 18. However, the structure of the support member 4 is not limited to this. That is, the support member 4 may be configured to include one of the sub-frame side rib 18 and the intermediate rib 18. However, as in the present embodiment, the support member 4 includes the sub-frame side rib 18 and the intermediate rib 18 so that the power unit mounting surface 12, the side wall surface 14, and the sub-frame mounting surface 16 are bent and deformed. This is preferable because it can be suppressed.

(5) Moreover, in the power unit support structure of this embodiment, although the power unit side opening part 24 was provided in a part of the side wall surface 14, it is not limited to this. That is, the power unit side opening 24 may not be provided in a part of the side wall surface 14, and the power unit mounting surface 12 and the side wall surface 14 may be closed over the entire circumference. However, it is preferable that the power unit side opening 24 is provided as in the present embodiment because the power unit can be easily attached to the power unit attachment surface 12.

(6) Further, in the power unit support structure of the present embodiment, the space 26 in the support member communicates with the outside of the space 26 in the support member between the support member 4 and the subframe member 2. Although the opening 28 is provided, the present invention is not limited to this. That is, the subframe-side opening 28 is not provided between the support member 4 and the subframe member 2, and the support member 4 and the subframe member 2 are closed over the entire circumference. May be. However, as in the present embodiment, the configuration in which the sub-frame-side opening 28 is provided is such that a foreign matter such as solid matter or liquid that has entered the space 26 in the support member is removed from the space 26 in the support member. It is suitable for moving to the outside.

(7) In the power unit support structure of the present embodiment, the support member 4 is formed by integral molding by casting. However, the present invention is not limited to this, and the support member 4 is formed by a method other than casting, such as press molding. May be formed by integral molding. However, as in the present embodiment, it is preferable to form the support member 4 by integral molding by casting because the manufacturing cost of the support member 4 can be reduced.

(8) In the power unit support structure of this embodiment, the subframe member 2 and the support member 4 are formed of the same material. However, the present invention is not limited to this, and the subframe member 2 and the support member are not limited thereto. 4 may be formed of another material. However, as in this embodiment, forming the subframe member 2 and the support member 4 from the same material can suppress the occurrence of electrical corrosion at the contact surface between the support member and the subframe member. Therefore, it is preferable.

(9) In the power unit support structure of the present embodiment, the power unit mounting portion 8 is provided at a position different from the position where the support members 4a and 4b are disposed on the upper surface side of the subframe member 2. It is not limited. That is, it is good also as a structure which does not provide the power unit attaching part 8 in the sub-frame member 2. FIG. However, as in the present embodiment, the configuration in which the power unit mounting portion 8 is provided in the subframe member 2 can correspond to different types of power units without changing the configuration of the subframe member 2. Therefore, it is preferable.

(10) Moreover, in the power unit support structure of this embodiment, the position which arrange | positions support member 4a, 4b among the upper surface sides of the sub-frame member 2 is set to the position corresponding to the power unit for 2WD vehicles. Moreover, the position which provides the power unit attaching part 8 among the upper surface side of the sub-frame member 2 is set to the position corresponding to the power unit for 4WD vehicles. However, these positions are not limited to the above positions, and the positions where the support members 4a and 4b are arranged on the upper surface side of the subframe member 2 are set to positions corresponding to the power units for 4WD vehicles. May be. Moreover, you may set the position which provides the power unit attaching part 8 among the upper surface sides of the sub-frame member 2 in the position corresponding to the power unit for 2WD vehicles.

1 is a diagram illustrating a configuration of a power unit support structure 1. FIG. It is a figure which shows the structure of the supporting member 4a, FIG.2 (a) is A line arrow directional view of FIG. 1, FIG.2 (b) is B line arrow directional view of FIG. 2 (a), FIG. ) Is a view on arrow C of FIG. FIG. 3 is a view taken along line III in FIG. 1. FIG. 4 is a view taken in the direction of arrows IV in FIG. 1. It is a V-line arrow line view of FIG. It is a figure which shows the power unit support structure 1 of the state which supported the power unit P. FIG. FIG. 7 is an enlarged view of a range surrounded by a circle VII in FIG. 6. It is a figure which shows the load added to the supporting member 4 in the power unit support structure 1 of the state which supported the power unit. It is a figure which shows the structure of the power unit support structure in the case of supporting the power unit for 4WD vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power unit support structure 2 Subframe member 4 Support member 8 Power unit attachment part 12 Power unit attachment surface 14 Side wall surface 16 Subframe attachment surface 18 Rib 24 Power unit side opening 26 Space in support member 28 Subframe side opening P Power unit Lp Power unit Load applied to the mounting surface Lv Vertical load Lh In-plane load Lc Compression load

Claims (7)

A subframe member constituting the vehicle body side member, and a support member attached to the upper surface side of the subframe member,
A power unit support structure for supporting a power unit disposed above the support member on the subframe member via the support member,
The support member includes a power unit mounting surface for mounting the power unit, a side wall surface continuous with the power unit mounting surface and extending below the power unit mounting surface, a lower end of the side wall surface, and the sub One or two or more subframe attachment surfaces attached to the frame member are integrally formed,
The sub-frame mounting surface is arranged on the outer peripheral side of the power unit mounting surface rather than the side wall surface when viewed from above and below,
Inclining the side wall surface away from the power unit mounting surface as it goes from the power unit mounting surface to the subframe mounting surface ,
A power unit mounting portion capable of mounting the power unit is provided at a position different from the position where the support member is disposed on the upper surface side of the subframe member,
The power unit mounting portion is integrally formed with the subframe member,
The position where the support member is arranged on the upper surface side of the sub-frame member is set to a position corresponding to one of a power unit for a two-wheel drive vehicle and a power unit for a four-wheel drive vehicle,
The position where the power unit mounting portion is provided on the upper surface side of the sub-frame member is set to a position corresponding to the other of the power unit for the two-wheel drive vehicle and the power unit for the four-wheel drive vehicle. Power unit support structure.   A first subframe mounting surface disposed in front of the power unit mounting surface in the vehicle front-rear direction relative to the power unit mounting surface; a second subframe mounting surface disposed in the vehicle front-rear direction rearward of the power unit mounting surface; The power unit support structure according to claim 1, further comprising a third sub-frame mounting surface disposed closer to the center in the vehicle width direction than the power unit mounting surface.   3. The power unit support structure according to claim 1, further comprising a rib that suppresses bending deformation of at least one of the power unit mounting surface, the subframe mounting surface, and the side wall surface.   4. The power unit according to claim 1, wherein a power unit side opening that communicates the space in the support member and the outside of the support member is provided in a part of the side wall surface. 5. Support structure.   5. The subframe-side opening that communicates the space in the support member with the outside of the support member is provided between the support member and the subframe member. The power unit support structure described in item 1.   The power unit support structure according to any one of claims 1 to 5, wherein the support member is integrally formed by casting.   The power unit support structure according to any one of claims 1 to 6, wherein the support member and the subframe member are formed of the same material.

Images