JP2016120855A - Grille shutter for vehicle, flap member for vehicle, and actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit a shaft part from vibrating relative to a fitting hole to inhibit occurrence of abnormal noise etc. and accurately transmit a driving force of an actuator to a flap member for a vehicle in a grille shutter for a vehicle in which the shaft part fits in the fitting hole to cause the flap member and the actuator to connect with each other.SOLUTION: A grille shutter for a vehicle has: a shaft part 31b provided at one of an actuator and a flap member; and a fitting hole 4c provided at the other of the actuator and the flap member and having a fitting hole 4c in which the shaft part 31b is fitted. Vibration prevention ribs 31e are inserted into a space between the shaft part 31b and an inner wall surface of the fitting hole 4c.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a vehicle grill shutter, a vehicle flap member, and an actuator.

  In recent years, in order to improve the fuel efficiency of a vehicle, a vehicle grill shutter may be provided for the grill opening. For example, as shown in Patent Document 1, the vehicle grill shutter includes an actuator, a plurality of flap members, and a link member that connects the flap members to each other, and rotates any of the flap members by the actuator. As a result, all the flap members are interlocked.

JP 2013-199178 A

  By the way, the connection between the actuator and the flap member is usually performed by fitting a shaft portion provided on one of the actuator and the flap member into a fitting hole provided on the other. However, if there is a slight gap between the shaft portion and the inner wall surface of the fitting hole, the shaft portion vibrates with respect to the inner wall surface of the fitting hole due to vibrations when the posture of the flap member is changed or the vehicle travels. In addition, the flap members adjacent to each other flutter, causing abnormal noise or the like. Further, when the flap member rotates, the contact range between the shaft portion and the fitting hole becomes small, and the driving force of the actuator may not be accurately transmitted to the flap member.

  The present invention has been made in view of the above-described problems. In a vehicle grill shutter in which a flap member and an actuator are connected by fitting a shaft portion into a fitting hole, the shaft portion with respect to the fitting hole is provided. An object of the present invention is to suppress the generation of abnormal noise and the like by suppressing vibrations and to accurately transmit the driving force of an actuator to a flap member.

  The present invention adopts the following configuration as means for solving the above-described problems.

  1st invention is provided with the actuator and the flap member by which the attitude | position change is made into a closed attitude | position and an open attitude | position by the said actuator, The axial part provided in one side of the said actuator and said flap member, The said actuator, and said flap member A grill shutter for a vehicle having a fitting hole into which the shaft portion is fitted, and an insertion portion interposed between the shaft portion and an inner wall surface of the fitting hole. The structure of having is adopted.

  According to a second invention, in the first invention, the shaft portion has a gear shape having a plurality of teeth arranged in a circumferential direction, and the insertion portion is in the circumferential direction of the shaft portion of the teeth. The structure which consists of the protrusion part provided integrally with the said tooth | gear on both sides is employ | adopted.

  3rd invention has the notch part formed by notching any one among the said several teeth in said 2nd invention, The said protrusion part is provided with respect to each of the said tooth | gear. The configuration is adopted.

  According to a fourth invention, in the second or third invention, the projecting portion extends in a direction along the axis of the shaft portion, and the height from the tooth surface toward the tip of the shaft portion is increased. A configuration is adopted in which the shape is set so as to be reduced.

  5th invention employ | adopts the structure that the top part which the said protrusion contact | abuts with respect to the inner wall face of the said fitting hole is planarized in the said invention in any one of the said 2nd-4th invention.

  A sixth invention is a flap member for a vehicle whose posture is changed between a closed posture and an open posture by an actuator, and a shaft portion fitted in a fitting hole provided in the actuator, or provided in the actuator A configuration is adopted in which a fitting hole into which the shaft portion fitted is fitted and an insertion portion inserted between the shaft portion and the fitting hole are employed.

  7th invention is an actuator which changes the attitude | position of a flap member for vehicles into a closed attitude | position and an open attitude | position, Comprising: The axial part fitted to the fitting hole provided in the said flap member for vehicles, or the said vehicle The structure which has the fitting hole by which the axial part provided in the flap member for fitting is fitted, and the insertion part inserted between the said axial part and the said fitting hole is employ | adopted.

  According to this invention, it has the insertion part inserted between the axial part provided in one of an actuator and a flap member, and the inner wall face of the fitting hole provided in the other of an actuator and a flap member. By inserting such an insertion portion between the shaft portion and the inner wall surface of the fitting hole, vibration of the shaft portion with respect to the fitting hole can be suppressed. Therefore, according to the present invention, in the vehicle grill shutter in which the flap member and the actuator are connected by fitting the shaft portion into the fitting hole, vibration of the shaft portion with respect to the fitting hole is suppressed, abnormal noise, etc. Can be suppressed. Further, the driving force of the actuator can be accurately transmitted to the flap member through the insertion portion.

It is a perspective view of the vehicle front part including the exploded perspective view of the grill shutter for vehicles in one embodiment of the present invention. It is the perspective view which looked at the drive flap member and actuator with which the grill shutter for vehicles in one embodiment of the present invention is provided from the engine room side, (a) is the perspective view which shows the state where it decomposed, (b) It is a perspective view which shows the state connected. It is an expansion perspective view containing the axial part of the drive flap member with which the grill shutter for vehicles in one embodiment of the present invention is provided. It is sectional drawing of the vibration prevention rib with which the grill shutter for vehicles in one Embodiment of this invention is provided. It is a principal part enlarged view of the actuator with which the grill shutter for vehicles in one Embodiment of this invention is provided. It is a schematic diagram containing the axial part and vibration prevention rib with which the grill shutter for vehicles in one Embodiment of this invention is provided. It is a schematic diagram containing the axial part and vibration prevention rib with which the modification of the grill shutter for vehicles in one Embodiment of this invention is provided.

  Hereinafter, an embodiment of a vehicle grill shutter, a vehicle flap member, and an actuator according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.

  FIG. 1 is a perspective view of the front portion of the vehicle including an exploded perspective view of the vehicle grill shutter 1 of the present embodiment. As shown in this figure, the vehicle 100 is provided with a front bumper 101 along the vehicle width direction on the front side. A grill opening 102 communicating with the engine room is formed on the lower side of the front bumper 101. The vehicle grill shutter 1 of the present embodiment is fixed to the vehicle body so as to be disposed in the grill opening 102 as shown in FIG.

  As shown in FIG. 1, the vehicle grill shutter 1 of this embodiment includes a frame 2, a flap member 3 (a vehicle flap member), an actuator 4, and a link member 5. The frame 2 includes an outer edge 2a that is substantially rectangular when viewed from the front of the vehicle 100, and a support 2b that extends in the vertical direction and is attached to the center of the outer edge 2a. In such a frame 2, a region surrounded by a substantially rectangular outer edge portion 2a is divided in the horizontal direction by a support column 2b. The frame 2 is formed of a composite material including, for example, polypropylene resin and glass fiber.

  In the region surrounded by the outer edge 2a of the frame 2, three flap members 3 are arranged in each region divided by the support column 2b. In order to rotatably support such a flap member 3, the frame 2 includes a plurality of shaft holes 2c provided on the side of the support column 2b and a shaft hole 2d provided on the outer edge portion 2a. The shaft hole 2c and the shaft hole 2d are provided one by one with respect to one flap member 3, and the shaft hole 2c and the shaft hole 2d that support the same flap member 3 face each other in the horizontal direction. It is provided as follows.

  Three flap members 3 are arranged in the vertical direction with respect to the left and right sides of the column 2b, and a total of six flap members 3 are provided in this embodiment. One of the flap members 3 is a drive flap member 31 directly connected to the actuator 4, and the remaining five are driven flap members 32 connected to the drive flap member 31 by the link member 5. These flap members 3 are rotatably supported at one end in the horizontal direction by a shaft hole 2c provided in the column 2b, and the other end is rotated by a shaft hole 2d provided at the outer edge 2a. It is supported movably. In addition, these flap members 3 have substantially the same shape, and when viewed from the front side of the vehicle 100, between the closed posture where the projected area is maximum in the movable range and the open posture where the projected area is minimum. Is rotated. Note that these flap members 3 are provided so as to partially overlap in the vertical direction when viewed from the front side of the vehicle 100 when the vehicle is in the closed posture, and the outside air passes through the outer edge portion 2a of the frame 2 by the closed posture. To prevent. Similar to the frame 2, such a flap member 3 is formed of a composite material including, for example, polypropylene resin and glass fiber.

  The drive flap member 31 is disposed at the center of the three flap members 3 arranged in the vertical direction on one side of the support column 2b, and the left and right ends are pivotally supported by the transmission of power from the actuator 4. Is rotated. As a result, the drive flap member 31 is changed between a closed posture and an open posture. The actuator 4 includes a servo motor, a solenoid, or the like as a drive source, and generates power for rotating the flap member 3 under the control of the engine control unit. The mounting structure between the drive flap member 31 and the actuator 4 will be described in detail later. The link member 5 connects the drive flap member 31 and the driven flap member 32, and drives the driven flap member 32 by transmitting the power transmitted from the actuator 4 to the drive flap member 31 to the driven flap member 32. The flap member 31 is rotated synchronously.

  In the vehicle grill shutter 1 of this embodiment, the flap member 3 is closed by the actuator 4 to prevent outside air from flowing into the grill opening 102. In addition, by opening the flap member 3 with the actuator 4, the outside air can be taken into the grill opening 102. The posture of the flap member 3 can be arbitrarily set between the closed posture and the open posture. In such a case, it becomes possible to take outside air having a flow rate according to the posture (that is, the opening degree) of the flap member 3 into the grill opening 102.

  Subsequently, a mounting structure of the drive flap member 31 and the actuator 4 will be described. FIG. 2 is a perspective view of the drive flap member 31 and the actuator 4 as viewed from the engine room side. FIG. 2A is a perspective view showing a disassembled state, and FIG. 2B is a perspective view showing a connected state. FIG. FIG. 3 is an enlarged perspective view of a shaft portion 31b described later included in the drive flap member 31.

  As shown in FIG. 2, the drive flap member 31 includes a flap body 31a, a shaft portion 31b, a support shaft 31c, and a link attachment plate 31d. As shown in FIG. 3, the drive flap member 31 includes vibration preventing ribs 31 e (insertion portions).

  The flap body 31a is a partially bent plate member, and is a part that functions as a shielding plate that shields outside air. The shaft portion 31 b is provided so as to protrude from the flap body 31 a toward the actuator 4, and is a portion that is fitted into a fitting hole 4 c described later of the actuator 4. As shown in FIG. 3, the shaft portion 31 b has a shape having a plurality of teeth 10 and cutout portions 11 in the circumferential direction when viewed from the mounting direction with respect to the actuator 4 (that is, the actuator 4 side). More specifically, when the shaft 31b is viewed from the direction of attachment to the actuator 4, the two squares having the same shape are overlapped by shifting the phase by 45 °, and the top of each square becomes the tooth 10, Furthermore, it has the shape which became the notch part 11 by cutting off one of the top parts. Such a shaft part 31b has a plurality of teeth 10 arranged at equal intervals in the circumferential direction, and a notch part 11 formed by notching one of the plurality of teeth 10.

  Each tooth 10 has a right isosceles triangular shape formed by connecting two sides at a right angle when viewed from the direction of attachment to the actuator 4. These teeth 10 mesh with teeth 20 provided in a fitting hole 4 c described later of the actuator 4, and transmit rotational power generated by the actuator 4 to the drive flap member 31.

  The notch portion 11 is for making the shape of the shaft portion 31b viewed from the direction of attachment to the actuator 4 rotationally asymmetric. This notch portion 11 is arranged at a position overlapping the embedded portion 21 provided in the fitting hole 4c when the shaft portion 31b is fitted in a fitting hole 4c described later of the actuator 4 in a normal posture. . In the present embodiment, such a notch portion 11 is provided at a position directly below when the drive flap member 31 is in the closed posture, as shown in FIG.

  Returning to FIG. 2, the support shaft 31c and the link mounting plate 31d are provided at the end of the flap body 31a opposite to the shaft portion 31b. The support shaft 31c is a pin-shaped portion that protrudes laterally from the flap body 31a, and is inserted into the shaft hole 2c of the column 2b. The link attachment plate 31d is a plate member that protrudes from the flap body 31a toward the engine room, and is provided with an attachment hole 31d1 for attaching the link member 5.

  As shown in FIG. 3, the vibration preventing rib 31 e is provided integrally with the tooth 10 of the shaft portion 31 b having a gear shape having a plurality of teeth 10 in the circumferential direction, and the diameter of the shaft portion 31 b from the surface of the tooth 10. It consists of a protrusion that protrudes outward in the direction. As shown in FIG. 3, the vibration preventing rib 31e has a substantially semicircular cross section, extends in a direction along the axis of the shaft portion 31b, and has a tip portion on the tip side (that is, the shaft portion 31b). It has a sharp shape toward the actuator 4 side. That is, the shape of the vibration preventing rib 31e is set so that the protruding amount (height) of the tip portion from the tooth 10 decreases toward the tip. FIG. 4 is a cross-sectional view of a region that is not the tip of the vibration preventing rib 31e. As shown in this figure, the vibration preventing rib 31e is flattened by increasing the radius of curvature of the top portion 31e1 relative to the rising portion 31e2. The vibration preventing rib 31e makes the top portion 31e1 contact the inner wall surface of the fitting hole 4c. Note that the radius of curvature of the top portion 31e1 may be set to infinity so that the top portion 31e1 is a flat surface.

  Such vibration preventing ribs 31e are provided for each of the teeth 10. Further, the vibration preventing ribs 31e are provided on both sides of the tooth 10 in the circumferential direction of the shaft portion 31b (see FIG. 6).

  These vibration preventing ribs 31e are inserted between the shaft portion 31b and the inner wall surface of the fitting hole 4c when the shaft portion 31b is fitted into the fitting hole 4c of the actuator 4. That is, the vibration preventing rib 31e fills a gap formed between the shaft portion 31b and the inner wall surface of the fitting hole 4c when the shaft portion 31b is fitted into the fitting hole 4c of the actuator 4. The variation of the shaft portion 31b with respect to the joint hole 4c is suppressed.

  FIG. 5 is an enlarged view of a main part of the actuator 4. The actuator 4 has a bearing 4a (see FIG. 2) and a mounting portion 4b. The bearing 4a supports the attachment part 4b so that rotation is possible. The attachment portion 4b has a fitting hole 4c into which the shaft portion 31b of the drive flap member 31 is fitted. The fitting hole 4c has a shape having a plurality of teeth 20 and an embedded portion 21 in the circumferential direction when viewed from the mounting direction (the drive flap member 31 side). More specifically, the fitting hole 4c has a shape viewed from the mounting direction with respect to the actuator 4 when the two squares having the same shape as the shaft portion 31b are overlapped with a phase shifted by 45 °. The top part of the tooth becomes a tooth gap, and further, one of the top parts is buried to form a buried part 21. Such a fitting hole 4c has a plurality of teeth 20 arranged at equal intervals in the circumferential direction, and an embedded portion 21 formed by embedding one of the tooth grooves. In such a fitting hole 4c, the shape formed by the inner wall surface when viewed from the insertion direction of the shaft portion 31b is slightly smaller than the outer shape viewed from the insertion direction of the shaft portion 31b so that the shaft portion 31b can be inserted. It has a large shape.

  Each tooth 20 has a right isosceles triangular shape formed by connecting two sides at a right angle when viewed from the direction in which the drive flap member 31 is attached. These teeth 20 mesh with the teeth 10 of the shaft portion 31 b and transmit the rotational power generated by the actuator 4 to the drive flap member 31. The embedded part 21 is a part facing the notch part 11 of the shaft part 31b. Such an embedded portion 21 has a shaft portion when the drive flap member 31 is attached to the fitting hole 4c, and when the posture of the drive flap member 31 is not a normal posture (that is, when the cutout portion 11 is not directly below). Interference with the teeth 10 of 31b prevents the shaft portion 31b from entering the fitting hole 4c. In the present embodiment, the embedded portion 21 is provided at a position where the posture of the mounting portion 4b is directly below when the drive flap member 31 is in the closed posture.

  When the drive flap member 31 is attached to the actuator 4 at the time of assembling the vehicle grill shutter 1 of this embodiment, first, the posture of the attachment portion 4b of the actuator 4 is matched. Here, the posture of the mounting portion 4b is adjusted so that the embedded portion 21 faces directly below. As a result, the normal posture of the drive flap member 31 with respect to the actuator 4 is a posture in which the cutout portion 11 is disposed directly below, that is, a closed posture.

  Subsequently, the shaft portion 31 b of the drive flap member 31 is inserted into the fitting hole 4 c of the mounting portion 4 b of the actuator 4. At this time, since the attachment portion 4b is set so that the embedded portion 21 is directly below, the drive flap member 31 cannot be attached to the actuator 4 unless the drive flap member 31 is in the closed posture. Therefore, the operator uses the notch 11 of the shaft 31b as a mark, and inserts the shaft 31b into the fitting hole 4c so that the notch 11 is directly below. Thus, according to the vehicle grill shutter 1 of the present embodiment, the drive flap member 31 can be attached to the actuator 4 only in a normal posture with respect to the actuator 4. For this reason, it is possible to prevent an operator from mistakenly attaching the drive flap member 31 to the actuator 4, and to prevent erroneous assembly of the drive flap member 31 to the actuator 4.

  FIG. 6 is a schematic view including the shaft portion 31b and the vibration preventing rib 31e. As shown in this figure, as described above, when the shaft portion 31b of the drive flap member 31 is fitted into the fitting hole 4c, the vibration preventing rib 31e is formed between the shaft portion 31b and the inner wall surface of the fitting hole 4c. It is inserted between. For this reason, the clearance gap formed between the axial part 31b and the inner wall face of the fitting hole 4c is filled with the vibration prevention rib 31e, and the fluctuation | variation of the axial part 31b with respect to the fitting hole 4c is suppressed. Therefore, according to the vehicle grill shutter 1 of the present embodiment, it is possible to suppress the vibration of the shaft portion 31b with respect to the fitting hole 4c and suppress the generation of abnormal noise or the like. Further, the driving force of the actuator 4 can be accurately transmitted to the driving flap member 31 through the vibration preventing rib 31e.

  Further, in the vehicle grill shutter 1 of the present embodiment, the shaft portion 31 b has a gear shape having a plurality of teeth 10 arranged in the circumferential direction, and vibration preventing ribs 31 e are provided on both sides of the teeth 10. For this reason, even if it is a case where the axial part 31b is rotated to which direction of the circumferential direction, the vibration prevention rib 31e can be reliably made to contact | abut to the inner wall face of the fitting hole 4c. For example, when the shaft portion 31b is rotated clockwise, the vibration preventing rib 31e disposed on the right side of the tooth 10 is strongly pressed against the inner wall surface of the fitting hole 4c. When the shaft portion 31b is rotated counterclockwise, the vibration preventing rib 31e disposed on the left side of the tooth 10 is strongly pressed against the inner wall surface of the fitting hole 4c. For this reason, even if it is a case where the axial part 31b is rotated to the any side of the circumferential direction, it becomes possible to suppress the vibration of the axial part 31b and to suppress generation | occurrence | production of abnormal noise. Further, the driving force of the actuator 4 can be accurately transmitted to the driving flap member 31 through the vibration preventing rib 31e.

  Further, in the vehicle grill shutter 1 according to the present embodiment, the vibration preventing rib 31e is formed of a protruding portion provided integrally with the tooth 10 of the shaft portion 31b. For this reason, it is not necessary to make the vibration preventing rib 31e an independent component, and the number of parts of the vehicle grill shutter 1 can be reduced as compared with the case where the vibration preventing rib 31e is made an independent component.

  Further, in the vehicle grill shutter 1 of the present embodiment, vibration preventing ribs 31 e are provided for each of the teeth 10. In the vehicle grill shutter 1 according to the present embodiment, the notch 11 formed by notching one of the plurality of teeth 10 is provided, so that a load that should act on the notched tooth 10 is notched. It acts on the tooth 10 adjacent to the part 11. For this reason, a load becomes large with respect to the tooth | gear 10 different from the tooth | gear 10 adjacent to the notch part 11. FIG. By providing the vibration preventing rib 31e for each tooth 10, the load received from the fitting hole 4c can be distributed and received by the vibration preventing rib 31e provided for each tooth 10. As a result, it is possible to prevent a large stress from acting locally on the teeth 10 adjacent to the notch 11, and as a result, the life of the drive flap member 31 can be prolonged.

  In the vehicle grill shutter 1 of the present embodiment, the tip of the vibration preventing rib 31e has a pointed shape in which the height from the surface of the tooth 10 gradually decreases toward the tip of the shaft portion 31b. Yes. Therefore, when the shaft portion 31b is inserted into the fitting hole 4c, the vibration preventing rib 31e can be prevented from being caught by the edge of the fitting hole 4c, and the assembling work can be easily performed.

  In the vehicle grill shutter 1 of the present embodiment, the vibration preventing rib 31e includes a top portion 31e1 that abuts against the inner wall surface of the fitting hole 4c, and the top portion 31e1 is flattened. For example, as shown by the phantom line in FIG. 4, when the top part 31e1 is formed with the same curvature radius as the rising part 31e2, the contact range of the vibration preventing rib 31e with the inner wall surface of the fitting hole 4c is extremely high. Get smaller. On the other hand, according to the vehicle grill shutter 1 of the present embodiment, since the top portion 31e1 of the vibration preventing rib 31e is flattened, the contact range of the vibration preventing rib 31e with the inner wall surface of the fitting hole 4c becomes extremely large. . Accordingly, the driving force of the actuator 4 can be accurately transmitted to the driving flap member 31 through the vibration preventing rib 31e.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the spirit of the present invention.

  For example, in the above embodiment, the configuration using the vibration preventing rib 31e as the insertion portion of the present invention has been described. However, the present invention is not limited to this, and it is possible to employ an insertion portion having a shape different from that of the vibration preventing rib 31e. For example, a hemispherical protrusion or the like can be used as the insertion part. Further, the insertion part may be a separate part from the shaft part 31b, and for example, an annular insertion part may be attached around the shaft part 31b.

  Moreover, in the said embodiment, the structure in which the vibration prevention rib 31e was provided integrally with the axial part 31b was demonstrated. However, the present invention is not limited to this, and for example, as shown in FIG. 7, it is also possible to employ a configuration in which vibration preventing ribs 4d (insertions) are provided on the inner wall surface of the fitting hole 4c. Is possible. By using the actuator 4 having such a vibration preventing rib 4d, it is not necessary to provide the vibration preventing rib 31e on the shaft portion 31b.

  Moreover, in the said embodiment, the structure by which only the front-end | tip part of the vibration prevention rib 31e was made into the sharp shape was employ | adopted. However, the present invention is not limited to this, and the shape of the vibration preventing rib 31e can be a shape in which the height gradually decreases toward the tip in the entire area in the axial direction of the shaft portion 31b. is there.

  Moreover, in the said embodiment, the structure which provided the axial part 31b in the drive flap member 31, and provided the fitting hole 4c in the actuator 4 was employ | adopted. However, the present invention is not limited to this, and it is also possible to adopt a configuration in which a fitting hole is provided in the drive flap member and a shaft portion is provided in the actuator.

  DESCRIPTION OF SYMBOLS 1 ... Grill shutter for vehicles, 3 ... Flap member, 4 ... Actuator, 4c ... Fitting hole, 4d ... Vibration prevention rib, 10 ... Tooth, 11 ... Notch part, 31 ... Drive flap member (Flap member for vehicle), 31b .. Shaft portion, 31e .. Vibration prevention rib (insertion portion), 31e1 .. Top portion

Claims (7)

An actuator, and a flap member whose posture is changed between a closed posture and an open posture by the actuator, a shaft portion provided in one of the actuator and the flap member, and provided on the other of the actuator and the flap member. A vehicular grill shutter having a fitting hole into which the shaft portion is fitted,
A vehicular grill shutter comprising an insertion portion interposed between the shaft portion and an inner wall surface of the fitting hole. The shaft portion has a gear shape having a plurality of teeth arranged in the circumferential direction,
The vehicular grill shutter according to claim 1, wherein the insertion portion includes projecting portions provided integrally with the teeth on both sides in the circumferential direction of the shaft portion of the teeth. Having a notch formed by notching any of the plurality of teeth;
The vehicle grill shutter according to claim 2, wherein the protrusion is provided for each of the teeth.   The projecting portion extends in a direction along the axis of the shaft portion, and is shaped so that a height from the surface of the tooth decreases toward the tip of the shaft portion. Item 4. The vehicle grill shutter according to Item 2 or 3.   The vehicular grill shutter according to any one of claims 2 to 4, wherein a top portion of the protruding portion that abuts against an inner wall surface of the fitting hole is flattened. A vehicle flap member whose posture is changed between a closed posture and an open posture by an actuator,
A shaft portion fitted in a fitting hole provided in the actuator, or a fitting hole in which a shaft portion provided in the actuator is fitted;
A vehicle flap member, comprising: an insertion portion interposed between the shaft portion and the fitting hole. An actuator for changing the posture of a vehicle flap member between a closed posture and an open posture,
A shaft portion fitted into a fitting hole provided in the vehicle flap member, or a fitting hole into which a shaft portion provided in the vehicle flap member is fitted;
An actuator having an insertion portion interposed between the shaft portion and the fitting hole.

Images