JP2014198508A - Vehicle grill shutter structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle grill shutter structure capable of achieving both layout property and cooling function.SOLUTION: In a grill shutter unit 30 comprising: a shutter unit 31 including a plurality of shutter members 35a to 35e that are provided in a vehicle body forward of a shroud member and that can be opened/closed; and opening/closing drive means that can drive the shutter members 35a to 35e to be opened/closed, the shutter unit 31 is fixed to a lower front wall portion 22c of the shroud member, and the opening/closing drive means deflects upward a guide direction of guiding traveling wind by the shutter member 35d provided downward of a lower end of an opening M of the shroud member rather than a guide direction of guiding the traveling wind by the shutter members 35a to 35c provided upward of the lower end of the opening M of the shroud member when the shutter members 35a to 35e are driven to be opened.

Description

  The present invention relates to a grill shutter structure for a vehicle, and more particularly, to a grill shutter structure for a vehicle including a shutter unit having a plurality of shutter members that can be opened and closed, and an opening / closing drive means that can drive the plurality of shutter members to open and close.

Conventionally, a grille shutter unit capable of adjusting the amount of traveling air introduced into the engine room via a traveling air inlet such as a front grill provided at the front end of the vehicle in order to improve combustion failure due to overcooling of the engine, radiator, etc. It has been known.
The traveling wind introduced into the engine room is a factor that causes air turbulence around the vehicle by flowing backward through the tunnel part of the floor panel when the vehicle is traveling. In order to avoid a decrease in the fuel efficiency of the vehicle, there is a growing tendency to mount a grill shutter unit that can adjust the amount of travel air introduced into the engine room.

The grille shutter unit includes a shutter unit having a plurality of shutter members that can open and close the traveling wind inlet, a drive motor that can open and close the plurality of shutter members, and the like.
The movable grill shutter for a vehicle of Patent Document 1 is integrally installed at the opening portion of the front grill, and is provided with a left first fin (left shutter member) having a first support shaft and a second right side having a second support shaft. A fin (right shutter member), a first output shaft that opens and closes the first fin, a second output shaft that opens and closes the second fin, and an actuator disposed between the first and second fins. The first and second universal joints are provided between the first and second output shafts and the first and second support shafts, respectively.

In addition, to improve the layout of the grill shutter unit and the design freedom in the engine room, the grill shutter unit is mounted on the front wall of the shroud member that supports the radiator, condenser, etc., and formed on the grill shutter unit and the bumper face. Also known is a structure in which a traveling wind inlet such as a front grill is connected by a duct member.
The duct structure at the front part of the vehicle in Patent Document 2 includes a front grill formed on a bumper face and a traveling wind inlet formed on the lower side of the front grill. These front grill, traveling wind inlet and radiator core A duct device (grill shutter unit) attached to the radiator core support is provided between the support and the radiator supported by the shroud member, and this duct device transmits the traveling wind to the radiator from the front grill and the traveling wind inlet. A plurality of duct parts to be supplied and a shutter for passing or blocking the traveling wind in each duct part are provided.

Usually, the shroud member needs to be lightweight while securing the rigidity of the radiator and capacitor, etc. and the strength as a vehicle component, so it is formed in a substantially rectangular frame shape with a hard synthetic resin material containing glass fiber etc. It is assembled to the vehicle body via a mounting bracket provided at the front end portion of the pair of left and right front side frames.
The grill shutter unit is disposed in front of the opening of the shroud member, and when a plurality of shutter members are driven to open, the running wind introduced from the running wind inlet is directly supplied to the radiator, the condenser, and the like. The cooling function is secured.

JP 2012-035829 A JP 2004-299522 A

The grill shutter unit of Patent Literature 2 is superior to the grill shutter unit of Patent Literature 1 in terms of layout and design freedom. In addition, the grill shutter unit of Patent Document 2 is separated from the traveling wind introduction port by a predetermined distance behind the vehicle wind introduction port, so that in the case of a light vehicle collision, the bumper reinforcement and the grill shutter unit It is also possible to avoid damage to the grill shutter unit due to interference.
However, although the grill shutter unit of Patent Document 2 ensures layout in the longitudinal direction of the vehicle body and design freedom, the layout property in the vertical direction of the vehicle body is not sufficient.
When the grill shutter unit is disposed in front of the opening of the shroud member, the position of the grill shutter unit is limited to the opening of the shroud member, and there is a possibility that the lower space of the engine room cannot be used. Depending on the position of the shutter unit, there is a possibility that the position of the traveling air inlet such as the front grill or the bumper grill may be limited.

On the other hand, when the grill shutter unit is disposed at a position partially offset downward from the opening of the shroud member in order to use the lower space of the engine room, when the plurality of shutter members are driven to open, Although the shutter member disposed above the lower end of the opening can directly supply the running air to the radiator, condenser, etc., it is guided to the shutter member disposed below the lower end of the opening of the shroud member. The generated traveling wind is shielded by the lower member (also referred to as shroud drawer) of the shroud member, and there is a problem that it cannot contribute to the cooling function of the grill shutter unit. In addition, the traveling wind shielded by the lower member of the shroud member may form air turbulence around the vehicle as described above.
Although it is conceivable to enlarge the grill shutter unit above the lower end of the opening of the shroud member and increase the shutter member, this increases the size and weight of the grill shutter unit and affects the layout of other members. So it's not realistic.

  An object of the present invention is to provide a grill shutter structure for a vehicle that can achieve both layout properties and a cooling function.

  According to a first aspect of the present invention, there is provided a vehicle grill shutter structure comprising: a shutter unit having a plurality of shutter members disposed in front of the vehicle body and capable of being opened and closed with respect to a shroud member provided at a front portion of the vehicle body; In a grill shutter member structure of a vehicle provided with an opening / closing driving means capable of opening and closing a plurality of shutter members, a lower portion of the shutter unit is fixed to a front wall portion of a lower member of the shroud member, and the opening / closing driving means includes: When the plurality of shutter members are opened, the second shutter member disposed above the lower end of the opening of the shroud member is arranged below the lower end of the opening of the shroud member relative to the guiding direction in which the traveling wind is guided. The first shutter member provided is configured to deflect the guiding direction for guiding the traveling wind upward. There.

  In the vehicle grill shutter member structure, since the lower part of the shutter unit is fixed to the front wall portion of the lower member of the shroud member, the shutter unit can be arranged by effectively utilizing the lower space of the engine room, In addition to the front-and-rear direction of the shutter unit in the vehicle body, layout properties and design freedom in the vehicle body vertical direction can be ensured.

  According to a second aspect of the present invention, in the first aspect of the invention, the opening / closing driving means includes a plurality of pinions fixed to the end portions of the plurality of shutter members, a rack member that meshes with the plurality of pinions, and the rack. And a drive motor capable of driving the member up and down, wherein the first pinion at the end of the first shutter member is formed to have a larger diameter than the second pinion at the end of the second shutter member. .

  The invention of claim 3 is the invention of claim 1 or 2, further comprising a traveling wind guide member extending from the outer peripheral edge portion of the shutter unit toward the front of the vehicle body, and the traveling wind guide member is disposed on the outer peripheral edge portion of the shutter unit. A frame portion to be mounted and a seal portion made of a soft synthetic resin that is connected to the front from the front end of the frame portion and is more flexible than the frame portion are provided.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the vehicle includes a bumper reinforcement provided at a front end of the vehicle body and a leg washer member provided at a lower portion of the front end of the vehicle body, and a lower end portion of the bumper reinforcement is The upper surface of the upper wall portion of the seal portion is formed in a close proximity, and the leg-pasting member is formed in contact with the lower surface of the lower wall portion of the seal portion.

  According to the first aspect of the present invention, when the plurality of shutter members are driven to open, the opening of the shroud member is more than the guiding direction for guiding the traveling wind by the first shutter member disposed above the lower end of the opening of the shroud member. Since the second shutter member disposed below the lower end of the section is configured to deflect the guiding direction for guiding the traveling wind upward, at least a part of the shutter unit is disposed below the lower end of the opening of the shroud member. The traveling wind can be guided to the opening of the shroud member without hindering the progress of the traveling wind introduced from below the lower end of the opening of the shroud member. Therefore, both the layout of the shutter unit and the cooling function can be achieved.

  According to the invention of claim 2, since a plurality of shutter members can be driven to open and close with a single drive motor, the layout of the shutter unit and the cooling function can be compatible while simplifying the structure.

  According to the third aspect of the present invention, the shutter unit can be disposed at a position where it can be easily arranged in the engine room in the engine room because it can be disposed at a predetermined distance from the traveling wind inlet behind the vehicle body. In addition, since the travel wind guide member extending from the outer peripheral edge of the shutter unit to the front of the vehicle body is provided, the travel wind introduced into the engine room can be restricted without passing through the shutter unit, and the travel air volume introduced into the engine room Can be adjusted accurately.

  According to the fourth aspect of the present invention, when the plurality of shutter members are driven to close, the traveling wind pressure blocked by the shutters shields the traveling wind guide member from the traveling wind inlet and flows into the engine room. In order to prevent wind, the fuel efficiency of the vehicle can be maintained in a good state.

It is the perspective view which looked at the vehicle provided with the grille shutter unit concerning Example 1 of the present invention from the front upper part. It is a front view of FIG. It is the III-III sectional view taken on the line of FIG. It is a figure which shows the state which removed the bumper face from FIG. FIG. 5 is a front view of FIG. 4. FIG. 5 is a plan view of FIG. 4. It is the perspective view which looked at the state which removed the bumper rain from Drawing 4 from the front lower part. It is a figure which shows the state which removed the bumper rain from FIG. It is a perspective view of the shroud member which assembled | attached the grill shutter unit. It is a perspective view of a grill shutter unit. FIG. 9 is an exploded perspective view of FIG. 8. It is a principal part longitudinal cross-sectional view when a shutter member drives closed. It is a principal part longitudinal cross-sectional view when a shutter member drives open. It is a principal part perspective view of an opening-and-closing drive means. It is a principal part perspective view of the opening / closing drive means of the grille shutter unit which concerns on Example 2. FIG. It is a principal part perspective view of the modification of an opening / closing drive means.

  Hereinafter, modes for carrying out the present invention will be described based on examples. In the figure, the arrow F direction is described as the front side of the vehicle body, and the arrow L direction is described as the left side of the vehicle body.

Hereinafter, Example 1 of the present invention will be described with reference to FIGS.
The vehicle V to which the present invention is applied includes a pair of left and right front side frames 1 extending in the front-rear direction, a pair of left and right crash cans 2 fixed to the front ends of the pair of left and right front side frames 1, and these A bumper reinforcement 3 (hereinafter abbreviated as a bumper rain 3) connected to the front ends of the left and right crash cans 2 and a rectangular frame-shaped shroud member 20 fixed to the bumper rain 3; A grill shutter unit 30 fixed to the shroud member 20, a bumper face 4 disposed at the front end of the vehicle body, and the like are provided.

First, main body components of the vehicle V will be described.
As shown in FIGS. 1, 3, 4, and 6, the pair of left and right front side frames 1 are disposed at a predetermined distance in the vehicle width direction, and the front ends of the pair of left and right front side frames 1 are arranged. The flanges 1a projecting vertically and horizontally are welded to each other.
The pair of left and right crush cans 2 are formed in a rectangular tube shape, and flanges 2a projecting in the vertical and horizontal directions are welded to the rear ends of the crush cans 2 and are connected to the flanges 1a by a plurality of bolts b1, respectively. These crash cans 2 are sized and shaped to absorb the collision energy by collapsing while being compressed and deformed by a collision load acting from the front via the bumper rain 3 in the event of a vehicle collision, and to achieve the desired energy absorption function. It is configured.

As shown in FIGS. 3 to 6, a bumper rain 3 is connected to the front ends of the pair of left and right crash cans 2, and the bumper rain 3 is configured in a closed cross-sectional shape extending in a convex shape in the left-right direction. Yes. The bumper rain 3 has a base plate 6 having a substantially hat-shaped cross section and a plate-shaped closing plate 7.
The base plate 6 includes a main body portion 6a having a substantially U-shaped cross section, an upper flange portion 6b extending upward from the upper end portion of the main body portion 6a, and an upper horizontal portion extending rearward by bending from the upper end portion of the upper flange portion 6b. The wall portion 6c, a lower flange portion 6d extending downward from the lower end portion of the main body portion 6a, and a lower horizontal wall portion 6e extending backward from the lower end portion of the lower flange portion 6d are provided.
The rear wall portion of the main body portion 6a is connected to the front end portions of the pair of left and right crash cans 2.
As shown in FIGS. 4 and 6 to 8, in order to support the shroud member 20 on the bumper rain 3 at a predetermined distance between the rear side of the bumper rain 3 and between the pair of left and right crash cans 2. A pair of left and right mounting brackets 25 are joined together. The pair of left and right mounting brackets 25 extends rearward from the rear wall portion of the main body 6a, and a pair of upper and lower bolt holes h6 are respectively provided in the side wall portions.

As shown in FIGS. 3, 12, and 13, the closing plate 7 is welded to the upper flange portion 6 b and the lower flange portion 6 d, and forms a closed cross-sectional portion that extends in the vehicle width direction in cooperation with the base plate 6. To do. On the front side of the closing plate 7, an impact absorber 8 formed of a foamed resin molded body such as urethane is disposed. The lower wall portion 8a of the shock absorber 8 is disposed at substantially the same height so as to be substantially flush with the lower horizontal wall portion 6e in the front-rear direction.
The shock absorber 8 absorbs collision energy by compressing and deforming due to a collision load applied from the front via the bumper face 4 and the bumper rain 3 at the time of a vehicle collision, and can achieve an intended energy absorption function. It is configured.

  3 and 4, a pair of left and right front subframes 9 extending in the front-rear direction are provided below the pair of left and right front side frames 1, and the front ends of the pair of left and right front subframes 9 are provided. A front cross member 10 that extends and connects in the vehicle width direction so as to span each other is disposed. The pair of left and right front sub-frames 9 are connected to a pair of left and right extension portions 11 in the form of a rectangular tube extending forward at positions corresponding to the pair of left and right crash cans 2 in plan view, respectively. A leg wiper member 12 extending in the vehicle width direction is attached to the front ends of the pair of extension portions 11.

  The leg displacing member 12 is a mechanism that protects the pedestrian by paying the pedestrian's leg when in contact with the pedestrian, and is a synthetic resin molded body having a substantially front convex curve that moves to the rear side toward the outside in the vehicle width direction. The left end portion and the right end portion that are formed by the above and are extended to the rear side are respectively fixed to the lower ends of the pair of extension portions 11. As shown in FIGS. 3 to 8, the leg member 12 includes a plate portion 12 a formed in a substantially horizontal shape in the vehicle width direction center and the vicinity thereof, and a front side of the plate portion 12 a and the vehicle width direction center portion. Are provided with a V-shaped groove 12b having a substantially V-shaped cross section formed so as to extend in the vehicle width direction, and a plurality of lattice-shaped rib portions 12c formed on the lower surface (rear surface) of the leg fixing member 12.

The leg disposing member 12 is disposed at substantially the same height as the front cross member 10 in a front view, and is formed such that the rear end portion of the plate portion 12a is slightly lower than the front portion. It is arrange | positioned so that the front wall part of the cross member 10 may be opposed.
As shown in FIG. 8, the V-shaped groove 12b collects water that flows down from a plurality of shutter members 35a to 35e, which will be described later, and stays on the plate portion 12a, and has a plurality of drains formed at the bottom. The water collected from the hole 12f is discharged to the outside (below the vehicle body).

  As shown in FIGS. 1 to 3, the bumper face 4 is disposed in front of the bumper rain 3, the shock absorber 8, the leg-pasting member 12, and the like, and is external to the vehicle V by a hard synthetic resin material (for example, PP). A surface is formed, and the bumper rain 3 and the grill shutter unit 30 are covered. The bumper face 4 includes a front grille 4a penetrating front and rear so as to face the shock absorber 8 at a central portion in the vehicle width direction, a front and rear bumper grille 4b provided below the front grille 4a, and left and right 1 A pair of headlight mounting openings 4c and a pair of left and right turn signal mounting openings 4d are provided.

As shown in FIG. 2, the bumper grill 4b is formed in a substantially flat shape having substantially the same vehicle width direction length as the front grill 4a in front view and extending in the vehicle width direction. The lower edge portion of the bumper grill 4 b is set at a height position substantially the same as the front wall portion of the front cross member 10.
In the present embodiment, the lower wall portion 8a and the lower horizontal wall portion 6e correspond to the upper outer peripheral wall surface of the ventilation introduction port of the grill shutter unit 30, and the upper surface of the lower edge portion of the bumper grill 4b and the front portion of the plate portion 12a. This corresponds to the lower outer peripheral wall surface of the ventilation introduction port of the grill shutter unit 30.

Next, the shroud member 20 will be described.
As shown in FIGS. 1 to 9 and 11, the shroud member 20 is arranged in a substantially vertical posture at a rear position of the bumper rain 3, and a radiator 15, a condenser (not shown) and the like are attached. The shroud member 20 is formed of a hard synthetic resin material, and extends in the left-right direction to support the upper portion of the radiator 15, the lower member 22 that extends in the left-right direction to support the lower portion of the radiator 15, and the upper member 21. And a pair of left and right stays for connecting the middle part of the upper member 21 and the middle part of the lower member 22 in the vertical direction. The member 24 is provided and is configured as a substantially rectangular frame-shaped integrally formed body having an opening M in front view.

As shown in FIGS. 1 to 9 and 11, the upper member 21 has a substantially L-shaped cross section, and includes a front wall portion 21 a and an upper wall portion 21 b extending rearward from the upper end of the front wall portion 21 a. ing.
A pair of left and right support openings (not shown) for supporting the upper portion of the radiator 15 are provided at the left end portion and the right end portion of the upper wall portion 21b. As shown in FIGS. 3, 9, and 11 to 13, the lower member 22 is disposed in the vicinity of the front side of the front cross member 10, and rearward from the upper front wall portion 22 a and the lower end of the upper front wall portion 22 a. A middle step portion 22b extending horizontally, a lower front wall portion 22c extending vertically downward from the rear end of the middle step portion 22b, and a lower wall portion 22d extending rearward from the lower end of the lower front wall portion 22c. Yes.

  As shown in FIG. 11, a pair of left and right bolt holes h1 for attaching the grill shutter unit 30 are formed at positions near the left end and right end of the lower front wall portion 22c. The lower wall portion 22d is disposed on the rear end portion of the plate portion 12a formed at a low height, and a pair of left and right support openings for supporting the lower portion of the radiator 15 are provided at the left end portion and the right end portion thereof. 22e are provided.

Each of the pair of left and right side members 23 has a substantially L-shaped cross section, and includes a front wall portion 23a and a lateral wall portion 23b extending rearward from the vehicle width direction outer end of the front wall portion 23a.
Since the pair of left and right side members 23 are symmetrical structures, the left side member 23 will be mainly described.
A pair of upper and lower bolt holes h2 for supporting the shroud member 20 on the bumper rain 3 and a grill shutter unit 30 at a position below the pair of upper and lower bolt holes h2 are attached to the middle step of the front wall portion 23a. A pair of upper and lower bolt holes h3 are formed. A bolt hole h6 (see FIGS. 7 and 8) of the mounting bracket 25 previously joined to the bumper rain 3 and a pair of upper and lower bolt holes h2 (see FIGS. 9 and 11) of the side member 23 are connected to a bolt b4 (FIG. 4). , See FIG. 5), the shroud member 20 is fixed to the bumper rain 3. Thereby, since the shroud member 20 is integrally connected to the bumper rain 3, when the bumper rain 3 moves backward, the shroud member 20 moves backward synchronously with the bumper rain 3.

Next, the grill shutter unit 30 will be described.
The grill shutter unit 30 allows traveling wind flowing into the engine room when the vehicle V is in a predetermined driving state, and travels into the engine room when the vehicle V is in any other state (for example, a state before warm-up). This is a travel air volume adjusting mechanism that restricts wind.
As shown in FIG. 3, the grill shutter unit 30 is disposed so as to overlap a part of the lower portion of the front grill 4a and the bumper grill 4b at a position above the plate portion 12a of the leg disposing member 12 in a front view. Located below the bumper rain 3. As shown in FIG. 11, the grill shutter unit 30 includes a pair of left and right bolt holes h1 formed in the lower front wall portion 22c of the shroud member 20 and an upper and lower portion 1 formed in the pair of left and right front wall portions 23a. It is attached to the pair of bolt holes h3 via bolts b2 and b3.

As shown in FIGS. 3 to 13, the grille shutter unit 30 is configured in a rectangular tube shape with a shutter unit 31 and a traveling wind guide member 32 that can be attached to the outer peripheral edge of the shutter unit 31. .
The shutter unit 31 is integrally formed with a rectangular tube-shaped unit frame portion 33, a plurality of rotation shafts 34a to 34e that are pivotally supported by the unit frame portion 33 and extend in the left-right direction, and the plurality of rotation shafts 34a to 34e. A plurality of shutter members 35a to 35e which are formed and can be opened and closed, and an opening and closing drive means 36 for opening and closing the plurality of shutter members 35a to 35e are provided.
In the present embodiment, a description will be given by taking, as an example, rotating shafts 34a to 34e arranged in the vertical direction and horizontally, and shutter members 35a to 35e integrally formed with the rotating shafts 34a to 34e, respectively.

As shown in FIGS. 8 to 13, the unit frame portion 33 is formed of a hard synthetic resin material (for example, PP), and includes an upper wall portion 41, a lower wall portion 42, a pair of left and right side wall portions 43, and a vehicle. A shaft support portion 44 that can pivotally support a plurality of rotating shafts 34 a to 34 e while connecting the upper wall portion 41 and the lower wall portion 42 at the intermediate position in the width direction is provided.
The lower wall portion 42 is disposed at a lower position than the middle step portion 22b, and is recessed downward from a unit-side concave portion 45 that is recessed downward in the center portion in the vehicle width direction, and a position near the rear end and left and right ends of the lower wall portion 42. A pair of left and right mounting flange portions 46 are provided.

The unit-side recess 45 is set to a length that is approximately half the vehicle width direction length of the lower wall portion 42 so as to correspond to the V-shaped groove 12b in plan view, and is higher than the other left and right side portions. It is formed so that the position is lowered.
Bolt holes h4 for attaching the shutter unit 31 to the shroud member 20 are formed in the pair of left and right mounting flange portions 46 at positions corresponding to the pair of left and right bolt holes h1 formed in the lower front wall portion 22c. Has been.

As shown in FIGS. 8 to 11, the pair of left and right side wall portions 43 includes a pair of left and right mounting flange portions 48 projecting outward from the rear end portion in the vehicle width direction, and a pair of left and right mounting flange portions 48. A pair of upper and lower bolt portions 47 extending forward from the upper and lower portions of the head are provided. The pair of left and right mounting flange portions 48 are formed with a pair of upper and lower bolt holes h5 for mounting the shutter unit 31 to the shroud member 20 at positions corresponding to the upper and lower pair of bolt holes h3.
As shown in FIGS. 11 and 14, a drive motor 73 capable of opening and closing the plurality of shutter members 35 a to 35 e is fixed to the right side wall portion 43.

  As shown in FIGS. 12 to 14, the plurality of rotation shafts 34 a to 34 e are arranged above the upper edge of the upper front wall portion 22 a corresponding to the lower end of the opening M of the shroud member 20. The moving shafts 34a to 34c, a rotating shaft 34d disposed below the upper edge of the upper front wall portion 22a, and a rotating shaft 34e disposed below the rotating shaft 34d. ing.

  The plurality of shutter members 35a to 35e are disposed above the upper edge portion of the upper front wall portion 22a corresponding to the lower end of the opening M so as to correspond to the plurality of rotating shafts 34a to 34e, respectively. The members 35a to 35c, the shutter member 35d disposed below the upper edge of the upper front wall portion 22a, and the shutter member 35e disposed below the shutter member 35d. The shutter member 35d and the shutter member 35e are disposed in front of the upper front wall portion 22a.

  As shown in FIG. 14, the opening / closing drive means 36 includes a plurality of pinions 71 a to 71 e fixed to the right end portions of the rotation shafts 34 a to 34 e, a rack member 72 that can mesh with the pinions 71 a to 71 e, A drive motor 73 capable of moving the rack member 72 up and down in the vertical direction and a motor-side pinion 73a capable of meshing with the rack member 72 are provided.

The plurality of pinions 71a to 71e are configured by pinions 71a to 71c fixed to the rotation shafts 34a to 34c, a pinion 71d fixed to the rotation shaft 34d, and a pinion 71e fixed to the rotation shaft 34e. ing.
The pinions 71a to 71c are each set to a radius r1, the pinion 71d is set to a radius r2 larger than the radius r1, and the pinion 71e is set to a radius r3 larger than r2.

  As shown in FIG. 14, the rack member 72 is formed to be wide in the front-rear direction and can be engaged with pinions 71 a to 71 c, and the front-rear direction width is narrower than the upper rack part 72 a and the pinion A middle rack portion 72b capable of meshing with 71d and a lower rack portion 72c formed with a narrower width in the front-rear direction than the middle rack portion 72b and capable of meshing with the pinion 71e are provided. The rear portion of the rack member 72 is configured to be able to mesh with a motor-side pinion 73 a connected to the drive shaft of the drive motor 73.

  When driving wind 73 is introduced into the engine room, the drive motor 73 rotates the motor-side pinion 73a counterclockwise to lower the rack member 72 in order to drive the shutter members 35a to 35e to open from the closed state. When moving and blocking the running wind flowing into the engine room, the motor-side pinion 73a is rotated clockwise to move the rack member 72 upward in order to drive the shutter members 35a to 35e from the open state to the closed state. Let

  As shown in FIG. 13, for example, the shutter members 35 a to 35 c are arranged so that the traveling wind guided to the shutter members 35 a to 35 e flows to the opening M without any trouble when the plurality of shutter members 35 a to 35 e are opened. The shutter member 35d is driven to open 90 degrees clockwise from the fully closed state, the shutter member 35d is rotated 60 degrees clockwise from the fully closed state, and the shutter member 35e is rotated 30 degrees clockwise from the fully closed state. As a result, the guiding direction for guiding the traveling wind by the shutter members 35d and 35e can be deflected upward from the guiding direction for guiding the traveling wind by the shutter members 35a to 35c. It passes through the opening M without being inhibited by the upper front wall portion 22a, and is supplied to the condenser and the radiator 15.

Next, the traveling wind guide member 32 will be described.
As shown in FIGS. 8 to 13, the traveling wind guide member 32 integrally includes a rectangular tube-shaped guide frame portion 37 and a rectangular tube-shaped seal portion 38 that extends forward from the front end of the guide frame portion 37. I have.
The guide frame portion 37 is formed of a hard synthetic resin material (for example, PP), and the seal portion 38 is formed of a flexible thermoplastic elastomer (TPE: for example, silicon rubber) that has flexibility. .
In this embodiment, a hard synthetic resin material is injected into a primary molding space formed in a pair of molds to form a guide frame portion 37, and a primary structure in which the guide frame portion 37 is continuously arranged. The one-piece running wind guide member 32 is manufactured by a different resin molding method in which a thermoplastic elastomer is injected into a secondary molding space in which the molding space is expanded to mold the seal portion 38.
Thus, the traveling wind guide member 32 made of two types of synthetic resins of different materials is manufactured in a single molding process, and the coupling force between the guide frame portion 37 and the seal portion 38 is increased.

As shown in FIGS. 8 to 13, the guide frame portion 37 is formed so as to be able to be fitted onto the front outer peripheral portion of the unit frame portion 33 by setting the inner peripheral size slightly larger than the unit frame portion 33. A part 51, a lower wall part 52, a pair of left and right side wall parts 53, a plurality of engaging parts 54, two pairs of upper and lower pairs of leg parts 56, and the like are integrally provided.
The upper wall portion 51 is formed in a front convex curved shape so that the front end shape thereof follows the rear end portion of the bumper rain 3 in a plan view, and is disposed on the rear side of the rear end portion of the bumper rain 3.

  The lower wall portion 52 is provided with a guide-side concave portion 55 that is recessed downward in the center portion in the vehicle width direction so as to correspond to the unit-side concave portion 45, and the height position is lower than the other left-side portion and right-side portion. It is formed to become. On the lower surface of the upper wall portion 51 and the upper surface of the lower wall portion 52, a plurality of engaging portions 54 having a substantially L-shaped cross section that can be engaged with the front portion of the unit frame portion 33 from the inside are formed. Thereby, when the traveling wind guide member 32 is assembled to the shutter unit 31 from the front, the rear inner peripheral portion of the guide frame portion 37 is fitted on the front end portion of the outer peripheral portion of the unit frame portion 33, and the plurality of engaging portions 54 are engaged. Engages with the front end portion of the inner peripheral portion of the unit frame portion 33.

  As shown in FIGS. 8 to 11, the pair of left and right side wall portions 53 of the guide frame portion 37 are a pair of upper and lower legs slightly extending rearward from the upper end portion and the lower end portion thereof and projecting outward in the vehicle width direction. Each part 56 is provided. Bolt holes h7 for fixing the traveling wind guide member 32 to the shutter unit 31 are formed in the leg portions 56 at positions corresponding to the respective bolt portions 47 of the unit frame portion 33.

  As shown in FIGS. 8 to 13, the seal portion 38 is integrally formed so as to be continuous forward from the front end of the guide frame portion 37. The seal portion 38 is formed from an upper seal portion 61, a lower seal portion 62 (lower wall portion), a pair of left and right side seal portions 63, and a front end portion of the pair of left and right side seal portions 63. A pair of left and right projecting seal portions 64 projecting outward in the width direction are integrally provided.

The upper seal portion 61 has an upper center seal portion 66 extending to a position near the lower wall portion 8a of the shock absorber 8 in the vehicle width direction center portion, and a left side portion and a right side portion of the upper center seal portion 66 are notched rearward. And a pair of left and right cutouts 67.
The upper center seal portion 66 is formed such that the front portion moves upward rather than the rear portion, and the upper surface of the upper center seal portion 66 is the lower wall portion 8a of the shock absorber 8 during assembly (stopping of the vehicle V). And the lower horizontal wall portion 6e of the bumper rain 3 are arranged close to each other so as to form a gap S (see FIG. 13). When the shutter members 35a to 35e are closed, the upper central seal portion 66 is elastically deformed upward as the pressure in the lower space of the upper central seal portion 66 increases due to traveling wind (arrow) that is blocked from traveling. It is configured to be possible (see FIG. 12).

  As shown in FIGS. 8 to 11, the pair of left and right cutout portions 67 are formed so as to cut out from the front end of the upper seal portion 61 toward the position near the rear end, and the plurality of shutter members 35 a to 35 e are closed. When operated, as shown in FIG. 11, the front end of the upper center seal portion 66 is configured to be pressed in close contact with the lower wall portion 8 a of the shock absorber 8 and the lower horizontal wall portion 6 e of the bumper rain 3. ing.

  As shown in FIGS. 12 and 13, the lower seal portion 62 is formed in an inclined shape so as to move downward toward the front side, and the front end lower surface extends over the entire region in the vehicle width direction. It is comprised so that it may be pressed on the upper surface of 12a in close contact. The lower seal portion 62 is provided with a seal-side recess 65 that is recessed downward in the center portion in the vehicle width direction corresponding to the guide-side recess 55, and is lower in height than the other left and right portions. It is formed to become. The seal-side recess 65 is formed in an inclined shape so as to move downward toward the front side, and a front end of the seal-side recess 65 abuts against the upper surface of the plate portion 12a at a position near the rear upper end of the V-shaped groove 12b.

The pair of left and right side seal portions 63 are formed to be longer in the front-rear length than the upper center seal portion 66 and the seal-side recess 65, and are always pressed in close contact with the back surfaces of the left and right portions of the bumper face 4. It is configured as follows. Overhang seal portions 64 that move outward in the vehicle width direction are formed on the outer sides in the vehicle width direction of the pair of left and right side seal portions 63, respectively.
The pair of left and right side seal portions 63 are provided with a plurality of rib portions 68 that protrude inward in the vehicle width direction and extend in the front-rear direction.

Next, a procedure for assembling the grill shutter unit 30 will be described.
First, as shown in FIG. 11, the shroud member 20 is assembled with the shutter unit 31, the radiator 15, and the like to form a shroud assembly. After overlapping the bolt holes h4 and h5 of the shutter unit 31 with the bolt holes h1 and h3 of the shroud member 20, the bolts b2 and b3 are inserted into the bolt holes h1, h3, h4 and h5 and fastened by a fastening tool (not shown). To do.

In the next step, the shroud assembly is fixed to the bumper rain 3.
A shroud assembly in which the shutter unit 31 is assembled to the shroud member 20 is transported from above the vehicle body with the bumper face 4 not mounted between the pair of left and right front side frames 1 to the rear position of the bumper rain 3 and provided on the bumper rain 3. The bolt hole h6 (see FIGS. 7 and 8) of the mounting bracket 25 and the bolt hole h2 (see FIGS. 9 and 11) of the shroud member 20 are overlapped and the bolt b4 (see FIGS. 4 and 5) is inserted, Fasten with a fastening tool.

In the next step, the traveling wind guide member 32 is assembled to the shutter unit 31.
The traveling wind guide member 32 is conveyed from the front of the vehicle body so as to pass between the lower wall portion 8a of the shock absorber 8 and the lower horizontal wall portion 6e of the bumper rain 3 and the plate portion 12a of the leg wiping member 12, and the traveling wind guide The bolt part 47 of the shutter unit 31 is inserted into the bolt hole h7 of the leg part 56 provided in the member 32 and fastened by the nut n1. At this time, as shown in FIG. 13, the upper surface of the upper center seal portion 66 of the traveling wind guide member 32 is spaced from the lower wall portion 8 a of the shock absorber 8 and the lower horizontal wall portion 6 e of the bumper rain 3. Since they are separated so as to form S, they can be easily assembled.
After the traveling wind guide member 32 is assembled to the shutter unit 31, the bumper face 4 is assembled.

Next, functions and effects of the grill shutter unit 30 of the vehicle V will be described.
According to the grill shutter unit 30 of the vehicle V, when the plurality of shutter members 35a to 35e are driven to open, the traveling wind is guided by the shutter members 35a to 35c disposed above the lower end of the opening M of the shroud member 20. Since the guide direction for guiding the traveling wind is deflected upward by the shutter member 35d disposed below the lower end of the opening M of the shroud member 20 with respect to the guiding direction, the opening M of the shroud member 20 is configured. At least a part of the shutter unit 31 can be disposed below the lower end, and the traveling wind is shrouded without obstructing the traveling wind introduced from below the lower end of the opening M of the shroud member 20. It can be guided to 20 openings M. Therefore, both the layout property and the cooling function of the shutter unit 31 can be achieved.

  The opening / closing drive means 36 includes a plurality of pinions 71a to 71c fixed to end portions of a plurality of rotating shafts 34a to 34e, in which a plurality of shutter members 35a to 35e are integrally formed, and the plurality of pinions 71a to 71c. And a drive motor 73 capable of moving the rack member 72 up and down, and the pinions 71a to 71c at the ends of the shutter members 35a to 35c are larger than the pinion 71d at the end of the shutter member 35d. It is formed in the diameter. Accordingly, since the plurality of shutter members 35a to 35e can be driven to open and close by the single drive motor 73, the layout of the shutter unit 31 and the cooling function can be compatible while simplifying the structure.

  A traveling wind guide member 32 extending forward from the outer peripheral edge of the shutter unit 31 to the front of the vehicle body is provided, and the traveling wind guide member 32 is mounted on the outer peripheral edge of the shutter unit 31. A seal portion 38 made of a soft synthetic resin that is connected forward from the front end and is more flexible than the guide frame portion 37 is provided. Thus, the shutter unit 31 can be installed at a position that is easy to arrange in the layout in the engine room because it can be arranged at a predetermined distance behind the vehicle wind introduction port. Further, since the traveling wind guide member 32 extending from the outer peripheral edge of the shutter unit 31 to the front of the vehicle body is provided, traveling wind introduced into the engine room can be restricted without passing through the shutter unit 31, and introduced into the engine room. The running air volume can be adjusted accurately.

  The vehicle V includes a bumper rain 3 provided at the front end of the vehicle body and a leg wiper member 12 provided at the lower front end of the vehicle body, and the lower horizontal wall portion 6e of the bumper rain 3 is close to the upper surface of the upper seal portion 61 of the seal portion 38. The leg cleaning member 12 is formed in contact with the lower seal portion 62 of the lower wall portion of the seal portion 38. Thus, when the plurality of shutter members 35a to 35e are driven to close, the traveling wind pressure blocked by the shutters 35a to 35e is shielded between the traveling wind guide member 32 and the traveling wind introduction port and flows into the engine room. In order to prevent traveling wind, the fuel consumption performance of the vehicle V can be maintained in a good state.

Next, the grill shutter unit 30A according to the second embodiment will be described with reference to FIG. Only the configuration different from that of the first embodiment will be described, and the same members as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.
In the first embodiment, the opening / closing drive means 36 opens and closes the plurality of shutter members 35a to 35e by the rack and pinion mechanism such as the rack member 72 that can mesh with the plurality of pinions 71a to 71e. 36A drives the shutter members 35a to 35e to open and close by a gear mechanism such as a plurality of gears 75a to 75d that can mesh with the plurality of pinions 71a to 71e.

As shown in FIG. 15, the opening / closing drive means 36A includes a plurality of pinions 71a to 71e fixed to the right end portions of the rotation shafts 34a to 34e, and a plurality of gears 75a to 75a that can mesh with the pinions 71a to 71e. 75d and any one of the plurality of pinions 71a to 71e, for example, a motor-side pinion 73a that can mesh with the pinion 71e, a drive motor 73A that can rotate the motor-side pinion 73a, and the like.
The gear 75a is pivotally supported between the pinions 71a and 71b so as to be able to mesh with both the pinions 71a and 71b, and the gear 75b is pivotally supported between the pinions 71b and 71c so as to be meshable with both the pinions 71b and 71c. Is pivotally supported between the pinions 71c and 71d so as to be able to mesh with both the pinions 71c and 71d, and the gear 75d is pivotally supported between the pinions 71d and 71e so as to be able to mesh with both the pinions 71d and 71e.

  As a result, the driving force for opening and closing the plurality of shutter members 35a to 35e can be transmitted from the driving motor 73A to the pinion 71d via the motor side pinion 73a, the pinion 71e, and the gear 75d, and similarly driven to the pinions 71a to 71c. Power is transmitted. Moreover, the opening degree of the plurality of shutter members 35a to 35e can be arbitrarily set by adjusting the radius ratio between the plurality of gears 75a to 75d and the plurality of pinions 71a to 71e.

Next, a modification in which the above embodiment is partially changed will be described.
1) In the above-described embodiment, the example in which the opening / closing driving means of the plurality of shutter members is configured by the rack and pinion mechanism or the gear mechanism has been described, but it may be configured by a link mechanism.
As shown in FIG. 16, the opening / closing drive means 36B of the grill shutter unit 30B is provided with a plurality of drive shafts 76a to 76e on the plurality of shutter members 35a to 35e, respectively, and the plurality of drive shafts 76a to 76e and motor side drive wheels. A link member 77 for linking to 78 is provided. For convenience of explanation, only the shutter member 35c is shown among the shutter members 35a to 35c.

The link member 77 pivotally supports the right end portions of the drive shafts 76a to 76c of the shutter members 35a to 35c to move on the arc locus, and pivotally supports the right end portions of the drive shafts 76d and 76e of the shutter members 35d and 35e. Thus, the drive shafts 76a to 76c are configured to move on the arc locus in a range narrower than the movement range of the drive shafts 76a to 76c. The link member 77 is formed with a plurality of groove portions 77X for avoiding interference with the rotation shafts 34a to 34e when the link member 77 moves.
Since the right end portion of the drive shaft 76d is held by the eyebrow-shaped shaft support portion 77a, the shutter member 35d opens after the opening of the shutter members 35a to 35c, and closes the shutter members 35a to 35c. It closes with a delay. Since the right end portion of the drive shaft 76e is held by an eyebrow-shaped shaft support portion 77b larger than the shaft support portion 77a, the shutter member 35e opens after the opening operation of the shutter member 35d, and the shutter member 35d closes. Closing operation is delayed. Therefore, when the plurality of shutter members 35a to 35e are opened, the opening of the shutter member 35d is smaller than the opening of the shutter members 35a to 35c, and the opening of the shutter member 35e is smaller than the opening of the shutter member 35d. Can be set.

2] In the above-described embodiment, an example in which a plurality of shutter members are opened and closed by a single drive motor has been described. However, a drive motor may be provided for each shutter member.
It is also possible to group a plurality of shutter members for each angle when fully opened and to provide a drive motor for each group.

3) In addition, those skilled in the art can implement the present invention by adding various modifications to the embodiments without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

  The present invention provides a grill shutter structure for a vehicle including a shutter unit having a plurality of shutter members that can be opened and closed, and an opening / closing drive means that can drive the plurality of shutter members to open and close, above the lower end of the opening of the shroud member. The guiding direction for guiding the traveling wind is deflected upward by the second shutter member disposed below the lower end of the opening of the shroud member than the guiding direction for guiding the traveling wind by the disposed first shutter member. As a result, both layout and cooling function can be achieved.

V Vehicle 3 Bumper rain 12 Leg wiper member 20 Shroud member 22 Lower member 22c Lower front wall portions 30, 30A, 30B Grill shutter unit 31 Shutter unit 32 Traveling wind guide members 35a-35e Shutter members 36, 36A, 36B Opening / closing drive means 37 Guide frame portion 38 Seal portions 71a to 71e Pinion 72 Rack members 73, 73A, 73B Drive motors 75a to 75d Gears

Claims (4)

A shutter unit having a plurality of shutter members disposed in front of the vehicle body and capable of opening and closing relative to a shroud member provided at the front of the vehicle body, and an opening / closing drive provided in the shutter unit and capable of opening and closing the plurality of shutter members A grill shutter structure for a vehicle comprising:
A lower portion of the shutter unit is fixed to a front wall portion of the shroud member;
The opening / closing driving means has a lower end of the opening of the shroud member in a direction in which the traveling wind is guided by the first shutter member disposed above the lower end of the opening of the shroud member when the plurality of shutter members are opened. A vehicle grill shutter structure characterized in that the second shutter member disposed below the second shutter member deflects the guiding direction for guiding the traveling wind upward. The opening / closing drive means includes a plurality of pinions fixed to end portions of a plurality of shutter members, a rack member meshing with the plurality of pinions, and a drive motor capable of driving the rack members up and down,
2. The vehicle grill shutter structure according to claim 1, wherein the first pinion at the end of the first shutter member has a larger diameter than the second pinion at the end of the second shutter member. A traveling wind guide member extending forward from the outer peripheral edge of the shutter unit to the vehicle body;
A frame portion on which the traveling wind guide member is attached to an outer peripheral edge portion of the shutter unit, and a seal portion made of a soft synthetic resin that is continuous forward from the front end of the frame portion and has more flexibility than the frame portion. The grill shutter structure for a vehicle according to claim 1 or 2, further comprising: The vehicle includes a bumper reinforcement provided at a front end of a vehicle body and a leg washer member provided at a lower part of the front end of the vehicle body,
A lower end portion of the bumper reinforcement is formed close to the upper surface of the upper wall portion of the seal portion,
The grill shutter structure for a vehicle according to claim 3, wherein the leg-pasting member is formed in contact with the lower surface of the lower wall portion of the seal portion.