JP7428591B2 - car body structure - Google Patents

Description

The present invention relates to a vehicle body structure for a vehicle such as an automobile.

For example, Patent Document 1 discloses a vehicle body structure in which a component mounting frame is attached from below to a vehicle body side bracket provided on a side member. A control unit is mounted above the component mounting frame, and a motor unit is temporarily fixed below the component mounting frame.

In the vehicle body structure disclosed in Patent Document 1, the motor unit is elastically supported via side motor mounts attached to a frame side mount bracket and a vehicle body side mount bracket, respectively. Further, the motor unit is elastically supported via front and rear motor mounts provided on the center member.

Furthermore, after fixing the frame-side mount bracket and center member, the motor unit can be separated from the component mounting frame and control unit when the vehicle is running by removing the bolts temporarily fixed to the component mounting frame. .

Japanese Patent Application Publication No. 8-310252

By the way, a so-called hanging engine mount structure (pendulum engine mount structure) is sometimes adopted in small automobiles. This suspended engine mount structure suspends the engine (internal combustion engine) using elastic mounts provided on both the left and right sides of the engine compartment, and connects a torque rod that extends from the bottom of the engine in the longitudinal direction of the vehicle to the bottom of the engine compartment. (including subframes).

However, since the motor installed in an electric vehicle has smaller vertical dimensions than the engine, it is difficult to share the mount frame on which the motor unit can be mounted with the engine mount of an engine-equipped vehicle. . Note that Patent Document 1 does not disclose or suggest that the mount frame on which the motor unit can be mounted is shared with the engine mount of an engine-equipped vehicle.

Furthermore, in the vehicle body structure disclosed in Patent Document 1, when the vehicle is running, the motor unit is separated from the component mounting frame and the control unit. For this reason, in the vehicle body structure disclosed in Patent Document 1, it is necessary to support a single motor unit with a small mass at short mount intervals, and it is necessary to increase the support capacity of the elastic mount in order to appropriately absorb motor vibration. There is.

The present invention has been made in view of the above points, and an object of the present invention is to provide a vehicle body structure in which a mount frame on which a motor unit etc. can be mounted and an engine mount of an engine-equipped vehicle can be shared. do.

In order to achieve the above object, the present invention provides a vehicle body structure having a mount frame disposed in a power plant room of a vehicle and on which a motor unit and auxiliary equipment are mounted. are each provided with a side elastic mount fixed to a vehicle body side member, and the mount frame includes a main body extending in the vehicle width direction, and a side elastic mount extending from both ends of the main body in the vehicle width direction toward the top of the vehicle. a pair of side wall portions, the motor unit is attached below the vehicle body of the body portion, the auxiliary equipment is attached above the body portion of the vehicle and between the pair of side wall portions, and the Each side wall portion is attached to the side elastic mount, respectively.

According to the present invention, it is possible to obtain a vehicle body structure in which a mount frame on which a motor unit or the like can be mounted and an engine mount of an engine-equipped vehicle can be used in common.

1 is a schematic plan view of a front portion of a vehicle body to which a vehicle body structure according to an embodiment of the present invention is applied; FIG. FIG. 2 is a schematic front view of the front part of the vehicle body shown in FIG. 1 when viewed from the front of the vehicle. FIG. 2 is an exploded perspective view of a mount frame, a side elastic mount, and a lower elastic mount mounted on the front of the vehicle body. It is a top view which shows the state in which the mount frame, the side elastic mount, and the lower elastic mount are arrange|positioned with respect to the left and right side frame.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In each figure, "front and back" indicates the vehicle longitudinal direction, "left and right" indicates the vehicle width direction (left and right direction), and "up and down" indicates the vehicle up and down direction (vertical up and down direction).

As shown in FIG. 1, the front body part 10 of the vehicle includes a pair of left and right side frames (vehicle body side members) 12, 12 located at both ends in the vehicle width direction and extending along the longitudinal direction of the vehicle, and a power plant room 14. Inside, a mount frame 16 is arranged between a pair of left and right side frames 12, 12.

As shown in FIG. 2, an auxiliary device 18, which will be described later, including, for example, a control unit, an air compressor, a heater, etc., is mounted above the vehicle on the mount frame 16. Further, a motor unit 20 is attached to the vehicle lower part of the mount frame 16.

The target vehicle of this embodiment is a hybrid vehicle (HEV) that runs using the motor unit 20 and an engine (not shown) as a driving source, or an electric vehicle that runs using only the motor unit 20 as a driving source. do.

As shown in FIGS. 1 and 2, a pair of left and right side elastic mounts 22, 22 are provided on both sides of the power plant room 14 in the vehicle width direction, respectively. Each side elastic mount 22 includes, for example, a mount bracket 23a fixed to the upper surface of the side frame 12 via a flange portion, an outer cylinder 23b connected to the mount bracket 23a, and an inner diameter side of the outer cylinder 23b. A rubber elastic body (insulator) is interposed between the provided inner cylinder 23c, the outer cylinder 23b, and the inner cylinder 23c, and is vulcanized and bonded to the inner peripheral surface of the outer cylinder 23b and the outer peripheral surface of the inner cylinder 23c, respectively. )23d. The mount frame 16 is elastically supported by a pair of left and right side elastic mounts 22, 22 arranged along the vehicle width direction.

The mount frame 16 has a substantially U-shape when viewed from the front of the vehicle (see FIG. 2), and includes a main body 24 extending in the vehicle width direction, and a main body 24 extending upward from the vehicle width direction from both ends of the main body 24 in the vehicle width direction. It has a pair of side wall portions 26, 26 (see FIG. 3). The mount frame 16 also has a pair of downwardly extending portions 28 that extend from the main body portion 24 toward the rear of the vehicle (one side in the longitudinal direction of the vehicle) and downwardly of the vehicle (see FIG. 3). In addition, in a pair of side wall parts 26, 26, the height dimension of one side wall part 26 in the vehicle vertical direction and the height dimension of the other side wall part 26 in the vehicle vertical direction may be the same, respectively. , or may be different.

As shown in FIG. 3, each downwardly extending portion 28 has a substantially trapezoidal shape when viewed from the side, and the vertical dimension becomes smaller toward the rear end of the vehicle. Attachment holes (through holes) for the mounts 30 are formed at the vehicle rear end portions of each of the downwardly extending portions 28 . Further, as shown in FIG. 4 , the vehicle rear end of the downwardly extending portion 28 projects further toward the vehicle rear than the main body portion 24 .

As shown in FIG. 2, a lower elastic mount 30 is attached to the lower portion of the downwardly extending portion 28 and the rear end of the vehicle. The downwardly extending portion 28 is fixed via a lower elastic mount 30 to, for example, a lower component of the power plant room 14 to which an engine (not shown) is directly fixed, or other vehicle body side members such as a subframe 32. The lower elastic mount 30 is attached to the lower component, the subframe 32, etc. via bolts and nuts (not shown).

Note that in FIGS. 1 and 2, C1, C2, and C3 each indicate the center point of the elastic mount. Further, in FIGS. 1 and 2, G indicates the center of gravity of the frame assembly 33.

The motor unit 20 is attached to the vehicle lower part of the main body 24 (see FIG. 2). The auxiliary machine 18 is attached above the vehicle of the main body 24 and between a pair of side walls 26 , 26 . Each side wall portion 26 is attached to each side elastic mount 22, respectively. Note that although this embodiment employs a structure in which the motor unit 20 and the auxiliary equipment 18 are directly attached to the main body 24, the present invention is not limited to this. For example, the motor unit 20 and the auxiliary equipment 18 may be attached to the main body 24 via a bracket (not shown).

Each side wall portion 26 extends substantially vertically upward from both ends of the main body portion 24 in the vehicle width direction. As shown in FIG. 3, a pair of attachment portions 34, 34 are provided at the upper end of each side wall portion 26 to be attached to the side elastic mount 22. As shown in FIG. Each attachment portion 34 may be constructed of, for example, a stud bolt and a nut. The side elastic mount 22 has a protrusion 36 that protrudes from each side frame 12 toward the center of the power plant room 14 (see FIG. 4). A pair of attachment portions 34 , 34 of each side wall portion 26 is attached to a protrusion 36 of the side elastic mount 22 .

As shown in FIG. 3, ribs 38 are provided between the main body 24 of the mount frame 16 and each side wall 26 to integrally connect (combine) each side wall 26 and the main body 24. ing. This rib 38 has a fixing part 40 to which a part of the auxiliary machine 18 is fixed. Here, "a part of the auxiliary machine 18" includes a harness, a tube, etc. (not shown) extending from the auxiliary machine 18. By providing this fixing portion 40, it can be used as a fixing point for an auxiliary equipment mount, a harness, or a tube, for example.

The vehicle body front section 10 of a vehicle to which the vehicle body structure according to the present embodiment is applied is basically configured as described above, and its effects will be described next.

In this embodiment, the mount frame 16 includes a main body portion 24 extending in the vehicle width direction, and a pair of side wall portions 26, 26 extending upward from the vehicle width direction ends of the main body portion 24 in the vehicle width direction. There is. The motor unit 20 is attached to the vehicle lower part of the main body part 24, and the auxiliary machine 18 is attached to the vehicle upper part of the main body part 24 and between a pair of side wall parts 26, 26. Each side wall portion 26 is attached to a side elastic mount 22 fixed to the side frame 12 (vehicle body side member).

In this embodiment, by adjusting the dimensions of each side wall portion 26 in the vehicle vertical direction, the mount frame 16 on which the motor unit 20 and the auxiliary equipment 18 can be mounted, and the engine mount of the engine-equipped vehicle (or only the mount fixing portion ) can be shared.

The engine mount of an engine-equipped vehicle is, for example, a hanging type engine mount (pendulum type engine mount), and the engine (not shown) is mounted on the vehicle body with the engine suspended from two places, one on the top and one on the left and right sides.

In addition, in this embodiment, the mass of the entire frame assembly including the mount frame 16, motor unit 20, and auxiliary equipment 18 can be supported with the same long mount interval as the engine, so the capacity of the elastic mount alone can be improved. There is no need to increase it excessively.

Furthermore, in this embodiment, the auxiliary equipment 18 can be mounted along the vehicle width direction by utilizing the space between the pair of side walls 26, 26 facing each other, so that the space in the power plant room 14 is reduced. can be used efficiently.

In this embodiment, the mount frame 16 includes a lower extending portion 28 that extends from the main body portion 24 in one direction in the longitudinal direction of the vehicle and downwardly of the vehicle, and a lower elastic mount 30 that is attached to the lower part of the lower extending portion 28. are doing. The downwardly extending portion 28 is fixed to another vehicle body side member via a lower elastic mount 30. This "other vehicle body side member" includes, for example, a structure that is directly fixed to the lower component of the power plant room 14, and a structure that is fixed via the subframe 32 or the like.

In this embodiment, the support point of the frame assembly 33 (the center point C3 of the lower elastic mount 30) can be set by the downward extension portion 28, regardless of the motor unit 20. As a result, in this embodiment, the center of gravity G of the entire frame assembly 33 is set to the center point (C1 , C2, C3).

In this embodiment, each side wall portion 26 extends substantially vertically upward from both ends of the main body portion 24 in the vehicle width direction. A mounting portion 34 for the side elastic mount 22 is provided at the upper end of each side wall portion 26 . Thereby, in this embodiment, the mounting space for the auxiliary equipment 18 located above the vehicle in the main body portion 24 can be secured to the maximum.

Furthermore, in this embodiment, each side wall portion 26 extends in a direction (vehicle vertical direction, vertical vertical direction) that receives the hanging load of the motor unit 20 and the load due to vertical vibration from the motor unit 20. It is possible to prevent a bending load (moment in the vehicle width direction) from being applied to a connection region (connection region) between both end portions of the main body portion 24 in the vehicle width direction and the lower end portion of the side wall portion 26 .

In this embodiment, the side elastic mount 22 has a protrusion 36 that protrudes from each side frame 12 toward the center of the power plant room 14 . The attachment portion 34 of the side elastic mount 22 is attached to the protrusion 36 .

In this embodiment, the frame assembly 33 can be mounted from below the vehicle between the pair of left and right side frames 12, 12. Furthermore, in this embodiment, the space in the vehicle width direction between the pair of left and right side frames 12 can be utilized to the maximum extent as the mounting space for the auxiliary equipment 18.

In this embodiment, a rib 38 is provided that connects each side wall portion 26 and the main body portion 24, and this rib 38 has a fixing portion 40 to which a part of the auxiliary machine 18 is fixed.

Accordingly, in this embodiment, the ribs 38 can support the collapse between each side wall portion 26 and the main body portion 24. Further, in this embodiment, it is not necessary to separately provide a part for fixing a part of the auxiliary machine 18, and the structure of the mount frame 16 can be simplified and manufactured easily.

Although the embodiments of the present invention have been described above, the present invention is not limited to the present embodiments, and can be modified as appropriate without departing from the gist of the present invention. Note that the present invention only needs to have a pair of side walls 26, 26 extending from both ends in the vehicle width direction of the main body 24 toward the top of the vehicle. It does not require that the vehicle or engine-equipped vehicle exist as an actual product.

12 Side frame (body side member)
14 Power plant room 16 Mount frame 18 Auxiliary equipment 20 Motor unit 22 Side elastic mount 24 Main body 26 Side wall 28 Lower extension 30 Lower elastic mount 32 Subframe (other vehicle body side members)
34 Mounting part 36 Projection part 38 Rib 40 Fixed part C1, C2, C3 Center point G Center of gravity

Claims (4)

In a vehicle body structure that is located in the power plant room of a vehicle and has a mount frame on which a motor unit and auxiliary equipment are mounted,
Side elastic mounts fixed to vehicle body side members are provided on both sides of the power plant room in the vehicle width direction, and
The mount frame has a main body portion extending in the vehicle width direction, and a set of side wall portions extending upward from the vehicle width direction end portions of the main body portion,
The motor unit is attached to the vehicle lower part of the main body,
The auxiliary machine is attached above the vehicle of the main body and between the pair of side walls,
The upper end of each of the side walls is attached to the side elastic mount ,
The mount frame has a downwardly extending portion extending downward from the main body portion of the vehicle and extending to the rear of the motor unit, and a lower elastic mount attached to a lower portion of the downwardly extending portion,
The lower extension portion is fixed to another vehicle body side member via the lower elastic mount.
The car body structure is characterized by: The vehicle body structure according to claim 1,
Each of the side wall portions extends substantially vertically upward from both ends in the vehicle width direction of the main body portion,
A vehicle body structure characterized in that an attachment portion for the side elastic mount is provided at an upper end portion of each of the side wall portions. The vehicle body structure according to claim 2,
The vehicle body side member consists of a pair of left and right side frames located at both ends in the vehicle width direction and extending along the vehicle longitudinal direction,
The side elastic mount has a protrusion that protrudes from each side frame toward the center within the power plant room,
The vehicle body structure, wherein the attachment portion is attached to the protrusion. The vehicle body structure according to any one of claims 1 to 3,
A rib is provided that connects each of the side wall portions and the main body portion,
The vehicle body structure is characterized in that the rib has a fixing part to which a part of the auxiliary machine is fixed.

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