JP2018083448A - Grill shutter mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flap rotation type grille shutter mechanism which can achieve an opening state having a large opening area with no obstacle when a flap is turned into an open state.SOLUTION: A grill shutter mechanism is formed having: a frame 11 having an opening 12; a rotary shaft 13 arranged parallel to an opening surface of the opening 12; a flap 14 which rotates around the rotary shaft and opens or closes the opening 12; and a moving member 15 which supports the rotary shaft 13 and moves parallel to the opening surface. The grill shutter mechanism is formed so as to be provided with a guide 16 which rotates the flap 14 around the rotary shaft 13 when the moving member 15 is moved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grill shutter mechanism that can be arranged in a narrow space in a vehicle.

  Some vehicle cooling systems have a grill shutter device mounted on the front side of a radiator disposed at the front of the vehicle. This grill shutter device is provided with an opening for introducing running wind to the front of the radiator during normal running, but when you do not want to give running wind to the radiator or engine when the engine is warming up, or during high-speed running In order to maintain the cooling effect of the radiator on the engine coolant within an appropriate range, and to prevent excessive air from being sucked into the engine room and increasing the air resistance, the opening should be closed. It has become.

  As this grille shutter device, for example, a rotating mechanism that switches a shielding plate (flap) between an open state and a shielding state around a rotation axis, and a shielding plate that is different from this rotating mechanism when the rotating mechanism does not operate There has been proposed a grill shutter provided with a moving mechanism that opens the opening by moving the (flap) by a method other than rotation (see, for example, Patent Document 1).

JP2015-104974A

  By the way, in the grill shutter described above, the rotating shaft of the shielding plate (flap) is supported by a rectangular frame, and is switched between the open state and the shielding state by the rotation of the shielding plate (flap) by about 90 degrees. In the state, the shielding plates (flaps) remain in the frame in a substantially horizontal state, but when viewed from the front of the vehicle, several shielding plates (flaps) are arranged in the vertical direction. In this state, an opening exists. For example, in the case of two shielding plates (flaps), the upper shielding plate (flaps), the upper and lower shielding plates (flaps), and the lower shielding plate (flaps) under three An opening will occur.

  In such an opening, the opening area is reduced by the shielding plate (flap) and the air flow is vortexed by the shielding plate (flap), the air flow is disturbed, and the inflow resistance of the air is reduced. There is a problem of increasing.

  An object of the present invention is to provide a grill shutter mechanism that can obtain an open state with a large opening area free from obstructions when the flap is opened in a flap rotary grill shutter mechanism. .

  In order to achieve the above object, a grille shutter mechanism according to the present invention includes a frame having an opening, a rotating shaft parallel to the opening surface of the opening, in the grille shutter mechanism disposed on the front side of a radiator of a vehicle. And a flap that rotates around the rotation shaft to open and close the opening, and a moving member that supports the rotation shaft and moves parallel to the opening surface, and moves the moving member. A guide is provided for rotating the flap around the rotation axis when the flap is moved.

  According to the grill shutter mechanism of the present invention, in the flap rotary grill shutter mechanism, when the flap is in the open state, the flap itself can be moved together with the rotation shaft from the center side of the opening to the frame side of the frame. It is possible to obtain an open state with a large opening area that does not obstruct the entry and exit of the wind.

It is the figure seen from the vehicle back which shows the composition of the grill shutter mechanism of an embodiment concerning the present invention, and is a figure showing the state where the opening part is open. It is the figure seen from the vehicle rear which shows the structure of the grill shutter mechanism of FIG. 1, and is a figure which shows the state which the opening part has closed. It is an enlarged view which shows the guide of the grill shutter mechanism of FIG. It is a schematic diagram which shows the relationship between the position of the rotating shaft of an open state, and the rotation angle of a flap. It is a schematic diagram which shows the relationship between the position of the rotating shaft of an intermediate state, and the rotation angle of a flap. It is a schematic diagram which shows the relationship between the position of the rotating shaft of a closed state, and the rotation angle of a flap.

  Hereinafter, a grill shutter mechanism according to an embodiment of the present invention will be described with reference to the drawings. The grill shutter mechanism according to the embodiment of the present invention is disposed on the front side of a radiator that is a part of a cooling system for an engine of a vehicle such as a truck, and the amount of air introduced into the radiator through the front grill It is a mechanism that adjusts.

  In the grill shutter mechanism 10 according to the embodiment shown in FIGS. 1 to 3, the grill shutter mechanism 10 includes a frame 11 having an opening 12, a rotating shaft 13 parallel to the opening surface of the opening 12, and the rotating shaft. A flap (shutter member) 14 that rotates around the opening 13 to open and close the opening 12 and a moving member 15 that supports the rotating shaft 13 and moves parallel to the opening surface are configured. Further, a guide 16 is provided for rotating the flap 14 around the rotation shaft 13 when the moving member 15 is moved. In addition, the fixed shielding member 17 is provided in the frame 11, and the place which cannot be obstruct | occluded even when the flap 14 becomes a closed state is obstruct | occluded.

  A drive motor 30 that generates a driving force for moving the moving member 15 is provided. By engaging the pinion 31 provided on the rotation shaft 30a of the drive motor (rotary drive body) 30 with the rack 15a provided on the moving member 15 side and rotating the driving motor 30, the moving member 15 is brought into the opening surface. Move in parallel. The moving member 15 is configured to be movable without being separated from the frame 11 by providing a guide mechanism (not shown) such as a groove in the frame 11 so that the moving member 15 can move smoothly with respect to the frame 11. The guide may not be provided on the frame 11 side, but may be provided on an external member provided at a place where the frame 11 is installed, for example, a member that supports the frame 11 in a fixed manner.

  The axial direction of the rotary shaft 13 of the flap 14 is normally the left-right direction (Y direction) of the vehicle on which the grill shutter mechanism 10 is mounted. However, the direction of movement is not limited to this direction. You may make it the up-down direction (Z direction) of a vehicle. The moving direction of the rotating shaft 13 is a direction orthogonal to the axial direction of the rotating shaft 13.

  Further, two moving opening / closing mechanisms comprising the rotating shaft 13, the flap 14, the moving member 15 and the guide 16 are provided for one frame 11, and the rack 15a provided on the moving member 15 is opposed to the pinion 31 therebetween. The moving direction of each moving member 15 is reversed. The pinion 31 and the two rotary shafts 13 are arranged on one straight line, and the rotary shaft 13 side of the moving member 15 is bent inward so that the two rotary shafts 13 move along the straight line. If it forms in a shape, in other words, J shape, and the rotating shaft 13 is arrange | positioned in this inner part, the depth of the grill shutter mechanism 10 in the vehicle front-back direction (X direction) can be narrowed.

  Further, as shown in FIGS. 4 to 6, the shape of the guide 16 provided in the frame 11 is such that the flap 14 is moved in accordance with the movement of the rotary shaft 13 in the vertical direction (Z direction) while pressing the rear end of the flap 14. Any shape may be used as long as the rear end is pressed to smoothly rotate the flap 14 around the rotation shaft 13. For example, the shape of the guide 16 is formed in a smooth curved shape such as an arc shape, an elliptical shape, or a parabolic shape. The guide 16 is disposed at a position where the rear end portion of the flap 14 can be pressed. The relationship between the guide 16 and the flap 14 is shown in FIGS.

  Further, the rack 15a of the moving member 15 can be easily formed by providing a concave portion or a convex portion on the pinion 31 side of the moving member 15. In particular, if the concave portion is constituted by a groove or a hole, the thickness of the moving member 15 in the vehicle front-rear direction does not increase even if the rack 15a is provided. Therefore, the installation space in the vehicle front-rear direction of the grill shutter mechanism 10 can be further reduced. it can.

  Further, when the pinion 31 is attached to the rotation shaft of the drive motor 30 and the pinion 31 is engaged with the rack 15a, the moving speed of the moving member 15 increases as the diameter of the pinion 31 increases, and the flap 14 opens and closes. Although the time is shortened, the space occupied by the pinion 31 is increased, and it is difficult to arrange the grill shutter mechanism 10 in a narrow space such as an engine room. On the other hand, when the diameter of the pinion 31 is reduced, the space occupied by the pinion 31 is reduced, but the moving speed of the moving member 15 is reduced and the opening / closing time of the flap 14 is also extended.

  Further, regarding the arrangement of the drive motor 30, when the diameter of the drive motor 30 is relatively large, the depth of the grille shutter mechanism 10 (the length in the vehicle front-rear direction) becomes large. At least a part of the drive motor 30 is disposed outside the frame 11. As a result, the drive motor 30 can be disposed at a position that does not interfere with the radiator (not shown) and other members (not shown) disposed on the rear side of the grill shutter mechanism 10. Furthermore, it is preferable to arrange the drive motor 30 so that a part of the drive motor 30 overlaps the frame 11 when viewed from the left-right direction of the vehicle, thereby further reducing the installation space in the front-rear direction.

  When the rotating shaft 30a or the pinion 31 of the drive motor 30 is disposed outside the frame 11 when viewed from the front side of the vehicle, the rack 15a is extended outside the frame 11 and the pinion 31 is outside the frame 11. Alternatively, this extended rack 15a may be engaged. Thereby, the freedom degree of the arrangement position of the drive motor 30 increases remarkably.

  Although not particularly illustrated, an intermediate gear may be provided on the rotating shaft 30a of the drive motor 30, and the pinion 31 may be engaged with the intermediate gear. That is, the intermediate gear is interposed between the pinion 31 and the drive motor 30. If the number of teeth of the pinion 31 is smaller than the number of teeth of the intermediate gear, the rotational speed of the pinion 31 can be made larger than the rotational speed of the drive motor 30 due to the relationship between the number of teeth of the intermediate gear and the number of teeth of the pinion 31. Therefore, the moving speed of the moving member 15 can be increased, and thereby the opening / closing time of the opening 12 can be shortened. Furthermore, since the degree of freedom of the positional relationship between the rack 15a and the drive motor 30 is increased by the amount of the intermediate gear, the degree of freedom of the arrangement position of the drive motor 30 can be increased. For example, it is relatively easy to dispose the rotational shaft 30a of the drive motor 30 outside the frame 11 when viewed from the front of the vehicle.

  Furthermore, in the grill shutter mechanism 10 of the above-described embodiment, the opening 12 is provided in one place, but there are a plurality of openings 12 in the moving direction of the moving member 15 or in a direction perpendicular to or intersecting with the moving direction. In addition, some frames 11 that open and close each of the openings 12 may be provided. In this case, since several openings can be provided in accordance with the design of the front of the vehicle, a plurality of openings can be provided instead of providing a large opening. Can be avoided.

  Further, when the rotation of the drive motor 30 is stopped, the torque for stopping the rotation is small, and the flap 14 receives the traveling wind, so that the flap 14 is rotated, and the rotary shaft 13 moves as the flap 14 rotates, and the grille is rotated. When there is a possibility that the shutter mechanism 10 is in an open state, the rotational torque of the flap 14 or the moving force of the rotary shaft 13 due to the traveling wind may be canceled by introducing a spring or the like. In other words, when it is difficult to adjust the angle of the flap 14 due to traveling wind, a configuration may be added in which an auxiliary force such as a spring is returned to the position based on the introduction.

  As described above, according to the grill shutter mechanism 10 of this embodiment, in the flap rotary grill shutter mechanism 10, when the flap 14 is in the open state, the flap 14 itself is rotated together with the rotary shaft 13 and the opening portion. 12 can be brought closer to the frame side of the frame 11, and an open state having a large opening area that does not obstruct the entry and exit of the wind can be obtained. Further, the installation space in the front-rear direction of the vehicle can be relatively small.

DESCRIPTION OF SYMBOLS 10 Grill shutter mechanism 11 Frame 12 Opening part 13 Rotating shaft 14 Flap 15 Moving member 15a Rack 16 Guide 17 Fixed shielding member 30 Drive motor 30a Rotating shaft 31 Pinion

Claims (4)

In the grill shutter mechanism arranged on the front side of the radiator of the vehicle,
A frame having an opening, a rotation axis parallel to the opening surface of the opening, a flap that rotates around the rotation axis to open and close the opening, and supports the rotation axis and is parallel to the opening surface And a moving member that moves to
A grill shutter mechanism comprising a guide for rotating the flap around the rotation shaft when the moving member is moved.   2. The grill shutter according to claim 1, wherein the moving member is moved by engaging a pinion provided on the rotation driving body side with a rack provided on the moving member side and rotating the rotation driving body. mechanism.   Two movement opening / closing mechanisms comprising the flap, the rotation shaft, the moving member, and the guide are provided for one frame, and the rack provided on the moving member is opposed to the pinion. The grill shutter mechanism according to claim 1, wherein the grill shutter mechanism is disposed and the moving direction of each of the moving members is reversed.   The grille shutter mechanism according to claim 1, wherein the guide is provided on the frame.

Images