JP3200128B2 - Car front body structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front vehicle body structure of a motor vehicle which is constructed by assembling a vehicle body front unit with a vehicle body side unit which forms a front portion of a vehicle body body in a motor vehicle.

[0002]

2. Description of the Related Art In an automobile, various types of vehicle bodies are adopted according to the use thereof. In many cases, a front portion of the vehicle body forms an engine room. The front part of the vehicle body forming such an engine room,
Usually, it is configured by combining a plurality of member units,
For example, as disclosed in Japanese Utility Model Laid-Open Publication No. 3-15278, it includes a pair of left and right front side frame members each extending in the front-rear direction of the vehicle body, and a front cross member connecting the front ends thereof on the lower side. The configured vehicle body main unit includes a vehicle body front unit including a front shroud upper member extending in the vehicle width direction, a stay member extending in the vehicle vertical direction and having an upper end coupled to the front shroud upper member, Both ends of the front shroud upper member are connected to a pair of left and right front side frame members, respectively, and the lower end of the stay member is connected to the front cross member so as to be assembled.

[0003] In the engine room formed by the front portion of the vehicle body obtained in this way, in addition to the engine body, various accessories such as a radiator, intake supercharging equipment, air conditioning equipment and the like. Will be accommodated,
Therefore, various devices have been devised for effectively utilizing the space in the engine room in order to accommodate various accessories and various devices in a good manner. A pair of left and right front fender panels, a front grill unit, a front bumper unit, and the like are mounted on the outer side of a front portion of the vehicle body forming the engine room, and an engine room / hood for closing the front fender panel from above. Is assembled, whereby a front portion of the vehicle body is formed.

[0004]

Under such circumstances, especially in a passenger car, the height of the front portion of the vehicle body should be reduced as much as possible for the purpose of reducing air resistance during traveling, etc. Furthermore, for the purpose of improving maneuverability,
There is a tendency that it is desired to reduce the length of the front side portion of the vehicle body in the vehicle longitudinal direction as much as possible. However, in response to such a demand, when the height of the front side portion of the vehicle body in which the engine room is formed is reduced and the length in the vehicle front-rear direction is reduced, the volume of the engine room is reduced. Work space for inspection or maintenance of each of the engine body, various accessories, and various devices such as an air-intake supercharging device and an air-conditioning device which are limited and are limited. The inconvenience that it is done is generated.

[0005] In view of the above, the present invention has been described as constituting a front portion of a vehicle body of an automobile.
When an engine room is formed inside the engine room, the height of the front side portion of the vehicle body and the length of the vehicle body in the longitudinal direction of the vehicle body are reduced, An object of the present invention is to provide a front vehicle body structure of an automobile, which can secure a working space for inspection or maintenance of various accessories and various devices.

[0006]

In order to achieve the above-mentioned object, a vehicle front body structure according to the present invention is provided with a pair of vehicles located at the front of a vehicle body and extending in the front-rear direction of the vehicle body. A body member side unit including a side frame member and a cross member for connecting front end portions of the pair of side frame members from below, and a member connecting portion provided, and a first engaging portion. A pair of second engaging portions are provided, the first engaging portion is engaged with the member connecting portion, and the pair of second engaging portions are respectively engaged with the pair of side frame members. And a vehicle body front unit to be assembled to the vehicle body main unit, and an engagement hole is provided in each of the pair of side frame members in the vehicle body main unit. Engaging projection portion is provided on the people each of the second engagement portions of the pair of vehicle body side unit to be brought into engagement with the pair of side frame members, the vehicle body-side unit and the vehicle body front unit, the engaging protrusion An engine room formation state in which the first engagement portion of the vehicle body front unit is engaged with the member connection portion of the vehicle body main body unit while being inserted into the engagement hole portion, and the engagement protrusion portion is partially related. An engine room expansion state in which the first engagement portion of the vehicle body front unit is displaced from the member connection portion of the vehicle body main unit in a direction in which the first engagement portion is separated from the member connection portion of the vehicle body main unit when inserted into the hole. It is made to be made.

[0007]

In the vehicle front body structure according to the present invention constructed as described above, the front end portions of the pair of side frame members in the vehicle body main unit are connected to each other by cross members to fix their mutual positions. And thereby
The front body unit is easily assembled to the vehicle body side unit, and the engagement holes are provided in each of the pair of side frame members, and the engagement protrusions are respectively engaged with the pair of side frame members. in Moto provided s husband second engagement portions of the pair of front body unit to be brought, the front body unit relative to the vehicle body side unit,
The engagement projection is inserted into the engagement hole, and the engine room is formed in a state where the first engagement portion of the vehicle body front unit is engaged with the member connection portion of the vehicle body side unit, and the vehicle body is assembled. Thereby, the front part of the vehicle body forming the engine room is formed inside. Then, from the state where the vehicle body front unit is assembled to the vehicle body main body side unit, the first engagement portion of the vehicle body front unit is formed under the condition that the engagement protrusion is partially inserted into the engagement hole. Is displaced in a direction away from the member connecting portion of the vehicle body main body side unit, so that the engagement state between the engagement protrusion and the engagement hole is maintained. The unit is separated from the vehicle body-side unit in the front-rear direction of the vehicle body, whereby the engine room formed inside the front part of the vehicle body is temporarily expanded.

Accordingly, even in Moto length in height reduction and the longitudinal direction of the vehicle body for the front portion of the vehicle body which constitutes the front portion of the vehicle body reduction is achieved, the engaging projection and the engaging With the engagement with the hole maintained, the front body unit is separated from the vehicle body side unit in the front-rear direction of the vehicle body, and the engine room is temporarily expanded, whereby the engine is expanded. A work space for inspection or maintenance of the engine body, various accessories, various devices, and the like housed in the room is secured.

[0009]

2 and 3 show an example of a front body structure of an automobile according to the present invention, together with other members of the automobile to which it is applied. 2 and 3 show a front shroud upper member 11 extending in the vehicle width direction and a front shroud upper member 11 extending in the vehicle body vertical direction at a front end portion of a vehicle body side unit 10 forming a front portion of a vehicle body in an automobile. A vehicle body front unit 15 formed by including a center stay member 12C and a pair of side stay members 12L and 12R whose upper end portions are coupled to the front shroud upper member 11 is assembled.
A radiator 17 and a radiator 17 having a pair of cooling fans 16L and 16R arranged side by side in the vehicle width direction on the rear side
Are supported in a state in which the front shroud upper member 11 is located behind the radiator 17. In this manner, the front portion of the vehicle body is formed by assembling the vehicle body front unit 15 to the front end portion of the vehicle body side unit 10, and an engine room is formed inside the front portion.

The vehicle body side unit 10 includes a pair of left and right front side frame members 20L extending in the vehicle longitudinal direction.
And 20R, and a front cross member 22 that couples and connects the front end portions of the front side frame members 20L and 20R from below to each other. Each of the end surfaces of the front side frame members 20L and 20R has an engagement hole 21L and 2L.
1R are respectively opened, the engaging holes 21L extend along the front side frame member 20L, and the engaging holes 21R are connected to the front side frame member 20L.
It extends along R. Further, member connecting portions 23L and 23R are provided at upper end portions of the front side frame members 20L and 20R, respectively. Member connecting portions 24L, 24R, and 24C are also provided on the upper surfaces of the left and right end portions and the central portion of the front cross member 22, respectively.

In the front unit 15 of the vehicle body, engaging portions 2 are provided at both ends of the front shroud upper member 11.
5L and 25R are formed. The side stay members 12L and 12R are provided with bracket members 13L, respectively.
And 13R are fixed, and the engagement protrusions 14L and 14R protrude from the bracket members 13L and 13R toward the rear side of the vehicle body, that is, toward the vehicle body side unit 10. When the vehicle body front unit 15 is assembled to the front end portion of the vehicle body main unit 10, the engagement protrusions 14L and 14R are opened at respective end surfaces of the front side frame members 20L and 20R in the vehicle body main unit 10. It takes positions corresponding to the engaging holes 21L and 21R, respectively.

An engaging portion 26C is formed at a lower end portion of the center stay member 12C in the vehicle body front unit 15, and engaging portions 26L and 26R are formed at lower end portions of the side stay members 12L and 12R. The lower support members 27C, 27L, and 27R extend forward from the engagement portions 26C, 26L, and 26R, respectively. Further, the vehicle body front unit 15 includes a pair of left and right upper support members 29L and 29L that protrude forward from the front shroud upper member 11.
R, and a connecting plate member 28 for connecting the engaging portions 26C, 26L and 26R respectively formed at the lower end portions of the center stay member 12C and the pair of side stay members 12L and 12R. .

When the vehicle body front unit 15 is assembled to the front end portion of the vehicle body side unit 10, as shown in FIG. 3, the rear side is moved from the bracket members 13L and 13R fixed to the side stay members 12L and 12R. The engagement projections 14L and 14R projecting from the front side frame members 20L and 20R are respectively entirely inserted into and engaged with the engagement holes 21L and 21R that are open at the end face portions of the front side frame members 20L and 20R. As shown in FIG. 4, engaging portions 25L and 25R formed at both end portions of the front shroud upper member 11 are connected to member connecting portions 23L and 23R provided on the upper surface of each of the front side frame members 20L and 20R. The center stay member 12C and the pair of side stay members are engaged with each other. 2L and 12R of each of the lower end portion which is formed in the engaging portion 26C, 26L and 26R is, the central portion and left and right end portions of the upper surface member connecting portion 24C provided in the front cross member 22, 24L and 24R
Then, they are engaged with the connecting plate member 28 therebetween.

The engaging portions 25L and 25R abutted and engaged with the member connecting portions 23L and 23R, respectively, are fastened by bolts and nuts, for example.
And 23R, and the member connecting portions 24C, 24
L and 24R are engaged with engaging portions 26C and 26, respectively.
The 6L and 26R are fixed to the member connecting portions 24C, 24L and 24R, for example, by fastening with bolts and nuts.

Further, as shown in FIGS. 2 and 4, the radiator 17 has engagement pins 31 and 32 projecting from the upper end face and the lower end face, respectively. Engagement pins 33 and 34 project from the upper and lower end surfaces, respectively. The radiator 17 and the air conditioning condenser 18
The pair of left and right upper support members 29L projecting forward from the front shroud upper member 11 of the vehicle body front unit 15 under the condition that the air conditioning condenser 18 is positioned in front of the radiator 17 and 29R and lower support members 27C, 27L and 27R extending forward from engagement portions 26C, 26L and 26R formed at the lower end portions of the center stay member 12C and the pair of side stay members 12L and 12R.
And the radiator 17 is provided with its engaging pin 3
1 is engaged with the through holes provided in the upper support members 29L and 29R, and the engagement pins 32 are engaged with the through holes provided in the lower support members 27C, 27L and 27R. Support members 29L and 2
9R and the lower support members 27C, 27L, and 27R, and the air-conditioning condenser 18 engages the engagement pins 33 with through holes provided in the upper support members 29L and 29R. The pin 34 is to be engaged with a through hole provided in the lower support members 27C, 27L and 27R, and the upper support member 29L
And 29R and lower support members 27C, 27L and 27R
And are supported by

Radiator 17 and air conditioning condenser 18
Is supported by the upper support members 29L and 29R and the lower support members 27C, 27L and 27R, and is fixed to the front side of the vehicle body front unit 15.
The front shroud upper member 11 constituting the vehicle body front unit 15 is located behind the radiator 17 and the front shroud upper member 1
1 and a center stay member 12C connecting the front cross member 22 constituting the vehicle body side unit 10,
A pair of cooling fans 1 projecting rearward from the radiator 17 and juxtaposed at a predetermined interval in the vehicle width direction.
It is located in a space 35 formed between 6L and 16R. Thus, the position of the radiator 17 can be made closer to the front shroud upper member 11 arranged behind the radiator 17.

In this manner, the vehicle body front unit 15 is assembled to the front end portion of the vehicle body side unit 10 to form the front portion of the vehicle body, and after the engine room is formed inside the front portion, the front side frame member 20L is formed. And a pair of left and right front fender panels 41 outside the 20R
L and 41R are attached, respectively, and the front bumper unit 42 is attached to the bracket members 13L and 13R fixed to the side stay members 12L and 12R of the vehicle body front unit 15 in a state of covering the radiator 17 and the air conditioning condenser 18, respectively. The engine room hood 43, which is connected and mounted, and further closes the engine room from above, is assembled to form a front portion of the vehicle body. In the engine room, the engine body 45 is mounted and accommodated at a position behind the radiator 17, and further, various accessories and various devices are accommodated.

As described above, the vehicle body side unit 1
The vehicle body front unit 15 is assembled to the front end of the
When the radiator 17 and the air conditioning condenser 18 are supported by the vehicle body front unit 15, the front shroud upper member 11 constituting the vehicle body front unit 15 is arranged behind the radiator 17. As a result, the space above the radiator 17 and the air conditioning condenser 18 can be reduced, thereby reducing the height of the front portion of the vehicle body.

When the radiator 17 and the air-conditioning condenser 18 are supported by the vehicle body front unit 15, a center stay member 12C connecting the front shroud upper member 11 and the front cross member 22 is provided with a radiator 17. The radiator 17 is located in the space 35 formed between the pair of cooling fans 16L and 16R arranged side by side on the rear side, and the position of the radiator 17 is brought close to the front shroud upper member 11 arranged behind the radiator 17. Accordingly, the position of the air-conditioning condenser 18 disposed in front of the radiator 17 is also brought closer to the front shroud upper member 11, and as a result, the length of the front side portion of the vehicle body in the vehicle longitudinal direction is reduced. The reduction will be achieved.

For example, when inspection / maintenance work is performed on the engine body 45 housed in the engine room, various accessories, various devices, etc., first, if necessary, the vehicle body The member connecting portions 23L and 23R provided on the front side frame members 20L and 20R of the main body side unit 10, respectively, and the members provided on the front shroud upper member 11 of the vehicle body front unit 15 which are brought into abutting engagement therewith. The fastening of the bolts and nuts to the joint portions 25L and 25R is released, and the member connecting portions 24C, 24L and 24R provided on the front cross member 22 of the vehicle body-side unit 10 and the vehicle body engaged with them respectively. Center stay member 12C and sides in front unit 15 Fastening by a bolt and nut for the over member 12L and 12R is released. continue,
As shown in FIG. 1, engaging projections 14L and 14R protruding rearward from bracket members 13L and 13R fixed to side stay members 12L and 12R of the vehicle body front unit 15 are attached to the front of the vehicle body main unit 10. Engagement holes 21L and 21R opened at the respective end surfaces of side frame members 20L and 20R.
The engagement portion 25 is partially inserted and engaged.
L and 25R are displaced forward so as to be separated from the member connecting portions 23L and 23R, respectively, and the engaging portions 26C, 26L and 26R are respectively displaced from the member connecting portions 24L and 23R.
The vehicle body front unit 15 is separated from the vehicle body main unit 10 to the front side so as to be displaced to the front side in the direction away from the C, 24L and 24R.

That is, in the vehicle body front unit 15, the engaging projections 14L and 14R are entirely inserted into and engaged with the engaging holes 21L and 21R, respectively, and the engaging portions 25L and 25R are respectively connected to the members. The engagement portions 26C, 26L and 26R are brought into contact with and engaged with the portions 23L and 23R.
However, each of the member connecting portions 24 is
C, 24L and 24R, the engagement with the vehicle body side unit 10, the engagement projections 14L and 14R are partially inserted and engaged with the engagement holes 21L and 21R, respectively. Is maintained, the engaging portions 25L and 25R are displaced in directions away from the member connecting portions 23L and 23R, respectively, and
6C, 26L and 26R are member connecting portions 24C and 24, respectively.
L and 24R are separated from each other, and can be selectively separated from the vehicle body-side unit 10 toward the front side thereof.

As described above, the engagement protrusions 14L and 14R
The front body unit 15 is separated from the vehicle body side unit 10 to the front side thereof while maintaining a state in which the vehicle body is partially inserted and engaged in the engagement holes 21L and 21R, respectively. The engine room formed inside the front part of the vehicle body formed by the side unit 10 and the vehicle body front unit 15 is temporarily expanded, whereby the engine body 45 accommodated in the engine room, A work space for inspection or maintenance of the auxiliary equipment and various devices is secured.

Thereafter, when the work for inspection and maintenance of the engine body 45, various accessories and various devices housed in the engine room is completed, the engagement projections 14L and 14R are again turned on, respectively. Engagement holes 21L and 2
1R and is entirely inserted into and engaged with the
L and 25R are brought into contact with the member connecting portions 23L and 23R, respectively, and the engaging portions 26C, 26L and 2
6R are engaged with the member connecting portions 24C, 24L, and 24R, respectively, with the connecting plate member 28 interposed therebetween, and are engaged with the engaging portions 25L, 25R that are brought into abutting engagement with the member connecting portions 23L, 23R, respectively. Are fastened by bolts and nuts, and are engaged with the member connecting portions 24C, 24L, and 24R, respectively.
R is fastened by bolts and nuts, and the front vehicle unit 15 is assembled to the vehicle body unit 10.

[0024]

As is apparent from the above description, in the vehicle front body structure according to the present invention, the front end portions of the pair of side frame members in the vehicle body main body side unit are connected by a cross member. Fixed relative to each other,
This facilitates the assembly of the vehicle body front unit to the vehicle body main body side unit, and the engagement holes are provided on each of the pair of side frame members, and the engagement protrusions are formed on the pair of side frame members. in Moto provided s husband second engagement portions of the pair of front body unit is caused to respectively engage the front body unit relative to the vehicle body side unit, the insertion engaging protrusions the engaging hole portion An engine room is formed in a state in which the first engagement portion of the vehicle body front unit is engaged with the member connecting portion of the vehicle body main unit, and the engine room is formed inside by being assembled. The front portion of the vehicle body is configured, and the engagement protrusion is partially formed from the state where the vehicle body front unit is assembled to the vehicle body main unit. With the engine room expanded state in which the first engaging portion of the vehicle body front unit is displaced in a direction away from the member connecting portion of the vehicle body main body side unit while being inserted into the hole, the engagement is established. With the engagement between the projection and the engagement hole maintained, the front vehicle body unit is separated from the vehicle body side unit in the front-rear direction of the vehicle body, so that the front part of the vehicle body is The engine room formed inside is temporarily expanded.

[0025] Therefore, even in Moto length in height reduction and the longitudinal direction of the vehicle body for the front portion of the vehicle body which constitutes the front portion of the vehicle body reduction is achieved, the engaging projection and the engaging By maintaining the engagement state with the holes, the front body unit is separated from the vehicle body side unit in the front-rear direction of the vehicle body, and the engine room is temporarily expanded, so that the engine room is expanded. It is possible to secure a working space for inspection or maintenance of the engine body, various accessories, various devices, and the like housed in the vehicle.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a front vehicle body structure of an automobile according to the present invention, together with other members of the automobile to which it is applied.

FIG. 2 is an exploded perspective view showing an example of a front vehicle body structure of an automobile according to the present invention, together with other members of the automobile to which it is applied.

FIG. 3 is a plan view showing an example of a front vehicle body structure of an automobile according to the present invention, together with other members of the automobile to which it is applied.

FIG. 4 is a side view partially including a cross section showing an example of a front body structure of the automobile according to the present invention together with other members of the automobile to which the front body structure is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Body-body-side unit 11 Front shroud upper member 12C Center stay member 12L, 12R Side stay member 13L, 13R Bracket member 14L, 14R Engagement projection 15 Body front unit 17 Radiator 18 Air conditioning condenser 20L, 20R Front side frame member 21L, 21R Engagement hole 22 Front cross member 23L, 23R, 24C, 24L, 24R Member connection 25L, 25R, 26C, 26L, 26R Engagement

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Tadayuki Shigeoka 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (56) References JP-A-2-249772 (JP, A) JP-A-3 -208780 (JP, A) JP-A-63-312279 (JP, A) JP-A-2-61784 (JP, U) JP-A-56-167878 (JP, U) (58) Fields investigated (Int. . ^7, DB name) B62D 25/08

Claims (1)

(57) [Claims] 1. A front portion of a body of an automobile is formed,
A vehicle body including a pair of side frame members each extending in the front-rear direction of the vehicle body and a cross member connecting front end portions of the pair of side frame members from below, and provided with a member connecting portion; A main body side unit, a first engaging portion and a pair of second engaging portions are provided, and the first engaging portion is engaged with the member connecting portion, and the pair of second An engagement portion is engaged with each of the pair of side frame members, and includes a vehicle body front unit that is assembled to the vehicle body main unit. An engagement hole portion is formed in each of the pair of side frame members. together provided, the engaging projection is provided on each of the pair of side frame members a second engaging portion of the pair induced to engage in, the vehicle body-side unit and the body front In the knit, an engine room forming state in which the engagement protrusion is inserted into the engagement hole, and the first engagement portion is engaged with the member connecting portion, and the engagement protrusion is partially An engine room expansion state in which the first engagement portion is displaced in a direction away from the member connection portion under the condition that the first engagement portion is inserted into the engagement hole portion. The front body structure of an automobile characterized by the following.