JP2004330942A - Engine mount structure for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine mount structure for an automobile capable of practically and sufficiently improving strength and rigidity without causing an increase in weight or manufacturing costs, and is excellent in energy absorbing efficiency according to loads from the front of the vehicle body. <P>SOLUTION: In the mount structure, a second mount bracket 19 attached to the vehicle side is joined to mount a power unit in the vehicle body. The second mount bracket 19 is provided with a pair of skeleton members 20, 21 arranged at a interval in the longitudinal direction of the vehicle body, and a connection member 22 arranged to connect the skeleton members 20, 21 and joined with the first mount bracket 27, and spread between a hood ridge panel 11 arranged as a side wall on right and left sides in the front of the vehicle body and a front side member 17 extended in the longitudinal direction of the vehicle body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an engine mount structure for an automobile having an engine-side mount bracket attached to an engine and a vehicle-body-side mount bracket attached to a vehicle body.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as an engine mount structure of an automobile, for example, as shown in Patent Document 1, an engine-side mount bracket (engine mount) as a first mount bracket attached to a power unit having an engine and a transmission, and a vehicle body The vehicle is mounted on the vehicle body by connecting the vehicle-side mount bracket (engine mount bracket) as a second mount bracket attached to the vehicle side via an insulator rubber (mount bush) made of an elastic member or the like. It has been known.
[0003]
Normally, an engine room of an automobile includes a hood ridge panel disposed as a left and right side wall in front of a vehicle body, a radiator core support erected on the front side of the vehicle body between the hood ridge panels, and a vehicle rear side between the hood ridge panels. It is partitioned by a dash panel erected on the side.
[0004]
The vehicle body-side mount bracket is attached to a front side member extending in the vehicle body front-rear direction in front of a strut housing for storing and supporting a shock absorber fixed to the hood ridge panel.
[0005]
[Patent Document 1]
JP-A-5-155255 (FIGS. 1, 3 and 4)
[0006]
[Problems to be solved by the invention]
By the way, as such a vehicle-body-side mount bracket, generally, a thin plate-shaped panel component is widely used. However, in this case, the strength and rigidity required for the mount bracket must be dealt with by increasing the mass, such as increasing the thickness of the panel component, and thus there is a problem that the weight and production cost increase. .
[0007]
When the weight of the panel component is increased in order to improve the strength and rigidity of the mount bracket as described above, the energy corresponding to the load should be absorbed by being crushed when a load is applied from the front of the vehicle body. The stroke of the front side member and the hood ridge panel may be sacrificed.
[0008]
Therefore, the present invention has been made in view of such a conventional problem, and it is possible to sufficiently improve the strength and rigidity practically without increasing the weight and production cost, and to respond to a load from the front of the vehicle body. It is an object of the present invention to provide an automobile engine mount structure having excellent energy absorption efficiency.
[0009]
[Means for Solving the Problems]
According to the present invention, the power unit is mounted on the vehicle body by joining the first mount bracket mounted on the power unit side having the engine and the transmission and the second mount bracket mounted on the vehicle body side. In an engine mount structure for an automobile, a second mount bracket is provided so as to connect a pair of skeletal members spaced at a predetermined distance in the vehicle front-rear direction and between the pair of skeletal members, and is connected to the first mount bracket. And a hood ridge panel provided as left and right side walls in front of the vehicle body and a front side member extending in the vehicle front-rear direction.
[0010]
【The invention's effect】
According to the present invention, the second mount bracket includes a pair of skeletal members having a predetermined interval in the vehicle longitudinal direction, and a connecting member provided to connect the pair of skeletal members. By mounting the member between the hood ridge panel and the front side member, the strength and rigidity required for the engine mount are practical while avoiding an increase in weight and the accompanying increase in production costs. Can be sufficiently improved.
[0011]
In addition, since the second mount bracket is constituted by a pair of skeletal members having a predetermined interval in the longitudinal direction of the vehicle body, when a load is applied from the front of the vehicle body, the skeletal members can function as a crush stroke. Therefore, the energy absorption efficiency according to the load can be significantly improved.
[0012]
Thus, it is possible to provide an engine mount structure for an automobile that can sufficiently improve strength and rigidity without causing an increase in weight and production cost and that is excellent in energy absorption efficiency according to a load from the front of the vehicle body. Can be.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0014]
1 and 2 show a first embodiment of an engine mount structure for an automobile according to the present invention, FIG. 1 is a perspective view showing a schematic configuration of an engine mount structure according to the present embodiment, and FIG. 2 is a main part in FIG. It is a perspective view which expands and shows. Although FIG. 2 shows only the left side of the vehicle body in FIG. 1 in an enlarged manner, it goes without saying that the right side of the vehicle body is similarly configured.
[0015]
In FIG. 1, reference numeral 10 denotes a vehicle body, and hood ridge panels 11 and 12 as left and right side walls in the front thereof, a radiator core support 13 erected on the vehicle body front side between the hood ridge panels 11 and 12, and a hood. An engine room 15 is defined by a dash panel 14 installed on the rear side of the vehicle body between the ridge panels 11 and 12.
[0016]
Further, strut housings 16, 16 in which shock absorbers (not shown) are stored and supported, and lower edges of the hood ridge panels 11, 12 are disposed in portions of the hood ridge panels 11, 12 facing the engine room 15. Further, a front side member 17 constituting a front-rear skeletal portion of a front portion of the vehicle body is provided integrally with a wheel house portion 18 formed on the hood ridge panels 11, 12, and a strut housing of the front side member 17 is provided. A vehicle body-side mount bracket 19 as a second mount bracket is fixed to the front of the vehicle body from the vehicle body 16 over the hood ridge panels 11 and 12.
[0017]
More specifically, as shown in FIG. 2, the vehicle body-side mount bracket 19 includes a pair of prismatic frame members 20 and 21 erected at predetermined intervals in the vehicle body front-rear direction. One end 20a, 21a of these frame members are connected to the hood ridge panel 11 and the other end 20b, 21b are connected to the front side member 17 using bolts 23 which are connection members. On the opposing surfaces 20c, 21c, there is provided a connecting portion 22 as a connecting member including a bottom portion 22a extending in the vehicle longitudinal direction and a back portion 22b extending in the vehicle vertical direction.
[0018]
Further, the vehicle-body-side mount bracket 19 has a mount member 24 formed of a pedestal 26 to which an insulator rubber 25 is fixed, and a bolt hole for attaching the pedestal 26 is provided on a bottom surface 22 a of the connecting portion 22. 22c is drilled. In addition, in the case of this embodiment, since the vehicle body-side mount bracket 19 has an H shape in a front view, the rear portion 22b of the connecting portion 22 is formed to be long in the vehicle body vertical direction in order to improve rigidity. ing. As a result, the rear portion 22b is provided with an opening 22c for preventing the insulator rubber 25 from abutting when the pedestal 26 is attached to the bottom portion 22a. The mount member 24 is configured to fasten the pedestal 26 to the bottom surface 22 a of the connecting portion 22 with a bolt 28.
[0019]
Then, an engine-side mount bracket 27 as a first mount bracket attached to a power unit having an engine and a transmission (not shown) is joined to the vehicle-body-side mount bracket 19 via an insulator rubber 24, thereby connecting the power unit. It is designed to be mounted on the body.
[0020]
As described above, in the engine mount structure of the present embodiment, the vehicle body-side mount bracket 19 is configured by the skeleton members 20 and 21 and the connecting portion 22, and the skeleton members 20 and 21 are connected to the hood ridge panel 11 and the front side member 17. In this way, it is possible to avoid an increase in weight due to an increase in plate thickness, etc., and an increase in production costs due to this, compared to the case where the body-side mount bracket is composed of panel components. At the same time, the strength and rigidity required for the engine mount can be sufficiently improved for practical use.
[0021]
Moreover, since the body mount bracket 19 is composed of the skeletal members 20 and 21, when a load is applied from the front of the vehicle body, the skeletal members 20 and 21 can function as a crushing stroke. The corresponding energy absorption efficiency can be significantly improved.
[0022]
Further, since the vehicle body side mount bracket 19 is disposed near the strut housing 16 in the front side member 17 (in this case, the vehicle body front side with respect to the strut housing 16), it can contribute to the strength and rigidity of the vehicle body 10.
[0023]
Further, since the vehicle body-side mount bracket 19 is provided between the hood ridge panel 11 and the front side member 17 by bolts 23 (so-called trim mounting), the engine mount position and the like are set to the vehicle body, the engine, and the like. Even if the position is set to a different position according to the variation, it is possible to cope with the simple operation of changing only the shape of the vehicle body-side mount bracket 19 without changing the shape of the vehicle body 10.
[0024]
This makes it possible to set the engine mount position etc. to different positions according to variations of the vehicle body, engine, etc., when the vehicle body side mount bracket is composed of panel parts joined by the conventional method such as spot welding etc. Various components provided around the panel component (vehicle-side mount bracket), which may be caused by the operation, have been changed, and the types of the vehicle body assembly accompanying the variations have been increased, that is, components constituting the vehicle body. An increase in points can be avoided.
[0025]
Next, a second embodiment of the engine mount structure for an automobile according to the present invention will be described in detail with reference to the drawings.
[0026]
FIG. 3 in which parts corresponding to those in FIG. 2 are assigned the same reference numerals is a perspective view showing a schematic configuration of an engine mount structure according to a second embodiment of the present invention. Instead, the configuration is substantially the same as the engine mount structure of the automobile in the first embodiment described above, except that the vehicle body side mount bracket 30 is provided. Note that FIG. 3 shows only the left side of the vehicle body in FIG. 1 in an enlarged manner, similarly to FIG. 2, but, of course, the right side of the vehicle body is similarly configured.
[0027]
Specifically, as shown in FIG. 3, the vehicle body side mount bracket 30 has two skeletal members 30a and 30b each having a shape of a prism and are erected at predetermined intervals in the longitudinal direction of the vehicle body. Between the surfaces, that is, on the opposing surfaces 30c and 30d of the skeletal members 30a and 30b, there is provided a connecting portion 31 as a connecting member for connecting them.
[0028]
The skeletal members 30a and 30b are integrally connected at one end 30e, which is one end, and the one end 30e is connected to the hood ridge panel 11 by bolts 23 (see FIG. 2). The other end sides 30f, 30g of these frame members 30a, 30b are connected to the front side member 17 by bolts 23 (see FIG. 2). In this way, the vehicle body-side mount bracket 30 is provided between the hood ridge panel 11 and the front side member 17.
[0029]
Further, the connecting portion 31 is provided with a bolt hole 31c for mounting a mount member 24 (see FIG. 2) having a pedestal 26 (see FIG. 2) to which an insulator rubber 25 (see FIG. 2) is fixed. Is established.
[0030]
In addition, in the case of this embodiment, since the vehicle body side mount bracket 30 has an A-shaped shape when viewed from the front, the rigidity is improved as compared with the vehicle body side mount bracket 19 in the first embodiment described above. The rear portion 31b of the connecting portion 31 can be formed shorter in the vehicle up-down direction. Therefore, when the pedestal 26 (see FIG. 2) is attached to the bottom surface 31a, the insulator rubber 25 (see FIG. 2) is prevented from abutting against the back surface 31b. It is not necessary to provide an opening for the opening.
[0031]
As described above, in the engine mount structure of the present embodiment, the vehicle body-side mount bracket 30 is configured to have the A-shape when viewed from the front by the skeleton members 30a and 30b and the connecting portion 31, and the skeleton members 30a and 30b are connected to the hood ridge. By being provided between the panel 11 and the front side member 17, in addition to the effect of the engine mount structure of the first embodiment described above, the rigidity of the vehicle body side mount bracket 30 is further improved. can do.
[0032]
Moreover, when the pedestal 26 (see FIG. 2) of the mounting member 24 (see FIG. 2) is attached to the back surface 31b of the connecting portion 31 and the bottom surface 31a, the insulator rubber 25 (see FIG. 2) contacts the back surface 31b. Since there is no need to provide an opening for avoiding contact, the connecting portion 31 can be easily formed.
[0033]
Although the engine mount structure of the vehicle according to the present invention has been described by taking the first and second embodiments as examples, the present invention is not limited to this, and various implementations are possible without departing from the gist of the present invention. A form can be adopted.
[0034]
For example, in the above-described embodiment, a case has been described in which prismatic skeletal members 20, 21, 30a, and 30b are used as components of the vehicle body-side mount brackets 19 and 30, which are the second mount brackets. The shape of the skeletal members 20, 21, 30a, and 30b is not limited to this, and for example, a columnar shape and other various shapes can be widely applied.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of an engine mount structure of an automobile according to a first embodiment of the present invention.
FIG. 2 is an enlarged perspective view showing a main part of the vehicle body in FIG. 1;
FIG. 3 is an enlarged perspective view showing a main part of an engine mount structure of an automobile according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Body 11 ... Hood ridge panel 16 ... Strut housing 17 ... Front side member 19, 30 ... Car body side mounting bracket (2nd mounting bracket)
20, 21, 30a, 30b ... Frame members 20a, 21a, 30e ... One end side 20b, 21b, 30f, 30g ... Other end side 22, 31, ... Connection part (connection member)
22a, 31a: bottom portion 22b, 31b: back portion 23: bolt (joining member)
Reference numeral 24: mounting member 25: insulator rubber 26: pedestal 27: engine side mounting bracket (first mounting bracket)

Claims (3)

In an engine mounting structure for an automobile, the power unit is mounted on a vehicle body by joining a first mount bracket mounted on a power unit side having an engine and a transmission and a second mount bracket mounted on a vehicle body side. ,
The second mounting bracket is
A pair of skeletal members having a predetermined interval in the vehicle longitudinal direction,
A connection member provided so as to connect between the pair of skeletal members, and connected to the first mount bracket;
An engine mount structure for an automobile, wherein the engine mount structure is provided between a hood ridge panel provided as left and right side walls in front of a vehicle body and a front side member extending in the vehicle front-rear direction. 2. The vehicle according to claim 1, wherein the second mount bracket is formed by connecting one end and the other end of the skeletal member to the hood ridge panel and the front side member, respectively, by a connecting member. 3. Engine mount structure. The skeletal member of the second mount bracket,
3. The engine mount structure for an automobile according to claim 1, wherein the one end is integrally connected.

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