JP6236409B2 - Grill shutter - Google Patents

Description

  The present invention relates to a grille shutter.

  In recent years, in order to improve the fuel efficiency of a vehicle, a grill shutter may be provided for a bumper opening provided on the front surface of the vehicle (for example, Patent Document 1). Such a grille shutter is provided with a plurality of flaps and an actuator for rotating these flaps, and adjusts the flow rate of outside air flowing into the engine room from the bumper opening.

  For example, in the grill shutter shown in Patent Document 1, a plurality of flaps are arranged on the left and right sides, and the flaps are connected by a link member arranged between the left and right flaps. In Patent Document 1, one of a plurality of flaps is connected to an actuator, and the other flaps connected via the link member are rotated in synchronization by rotating the flaps.

JP 2013-199178 A

  By the way, in the grill shutter in which the link member is disposed between the left and right flaps as in Patent Document 1, a portion for connecting the link member to the link member side of the flap is required. For example, when the link member has a shaft portion, a protruding piece having a shaft hole into which the shaft portion of the link member is inserted is provided on the link member side of the flap.

  However, it is necessary to provide a portion for connecting to the link member on the opposite side between a flap disposed on the left side in the vehicle width direction (hereinafter, left flap) and a flap disposed on the right side (hereinafter, right flap). is there. That is, when providing the above-mentioned protruding piece, the protruding piece is provided at the right end with respect to the left flap, and the protruding piece is provided at the left end with respect to the right flap. For this reason, the left flap and the right flap have different shapes.

  Thus, when the left flap and the right flap are different in shape, it is necessary to check whether the left flap or the right flap is used when attaching the flap, which causes a reduction in the efficiency of the assembly work. In addition, a mold for forming the left flap and a mold for forming the right flap are required, respectively, resulting in an increase in manufacturing cost and a replacement operation of the mold, leading to deterioration in manufacturing efficiency. In addition, a gauge, which is a jig for checking the dimensional accuracy of the flap, is required for each of the left flap and the right flap, resulting in an increase in manufacturing cost and a deterioration in the efficiency of assembly work.

  The present invention has been made in view of the above-described problems, and in a grille shutter, prevents the left side flap and the right side flap from being different in shape from deteriorating the efficiency of assembly work and increasing the manufacturing cost. With the goal.

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

  1st invention is a grill shutter for vehicles provided with a frame and a plurality of flaps connected to a frame so that rotation is possible, and the left flap arranged as the above-mentioned flap on the left side of the vehicle width direction A configuration is adopted in which a right side flap disposed on the right side in the vehicle width direction is provided, and the left side flap and the right side flap have the same shape.

  According to a second invention, in the first invention, the flap includes a flap body, and an end piece disposed at each end of the flap and connected to an end of the flap body, A configuration is adopted in which the end piece has a shaft hole into which a shaft portion that pivotally supports the flap body is inserted.

  According to a third invention, in the second invention, a link member is provided between the left flap and the right flap and has a plurality of shaft portions protruding sideways, and each of both ends of the flap. Each of the end pieces disposed in the shaft has a shaft hole for a link member into which the shaft portion of the link member can be inserted, and the shaft portion of the link member is disposed at each of both ends of the flap. A configuration is adopted in which one of the end pieces is inserted into one of the link member shaft holes.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the sensor includes a sensor that detects the position of the link member shaft hole in which the shaft portion of the link member is not inserted.

  According to the present invention, the left flap and the right flap have the same shape. For this reason, when attaching a flap, it becomes unnecessary to perform the operation | work which confirms whether it is a left side flap or a right side flap. Further, the left flap and the right flap can be formed by one mold. Furthermore, the dimensional accuracy of the left flap and the right flap can be confirmed with one gauge. Therefore, according to the present invention, in the grill shutter, it is possible to prevent the deterioration of the efficiency of the assembly work and the increase in the manufacturing cost due to the difference between the shapes of the left flap and the right flap.

It is a front view of the vehicle in which the grill shutter of one embodiment of the present invention is installed. It is a front view which shows typically the grill shutter of one Embodiment of this invention. It is a partial exploded perspective view containing the flap of the grill shutter of one embodiment of the present invention. It is the sectional view on the AA line of FIG. It is a perspective view of the flap with which the grille shutter of one embodiment of the present invention is provided, and a link member.

  Hereinafter, an embodiment of a grille shutter 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 front view of a vehicle 100 in which the grill shutter 1 of the present embodiment is installed. As shown in this figure, a bumper opening 101 for taking outside air into the engine room is provided on the front surface of the vehicle 100. The grill shutter 1 of the present embodiment is provided inside such a bumper opening 101.

  FIG. 2 is a front view schematically showing the grill shutter 1 of the present embodiment. FIG. 3 is a partially exploded perspective view of the grille shutter 1 including the flap 5. 4 is a cross-sectional view taken along line AA in FIG. In FIG. 3, a right side wall 2a2 of the frame 2 described later is omitted. As shown in FIG. 2, the grill shutter 1 of the present embodiment includes a frame 2, a detachable block 3, a fastening screw 4, a flap 5, a link member 6, an actuator 7, and a sensor 8. .

  The frame 2 includes an outer edge portion 2a, a support column 2b, an abutting portion 2c, and a stopper 2d, and a detachable block 3, a fastening screw 4, a flap 5, a link member 6, an actuator 7, The sensor 8 is supported directly or indirectly. Such a frame 2 is configured by integrating an outer edge portion 2a, a support column 2b, an abutting portion 2c, and a stopper 2d, and is formed of, for example, resin by injection molding. The outer edge portion 2 a is an annular portion provided along the edge of the bumper opening 101. As shown in FIG. 2, the outer edge portion 2a includes a left side wall 2a1 disposed on the left side, a right side wall 2a2 disposed on the right side, and an upper wall 2a3 disposed on the upper side as viewed from the front side of the vehicle 100. And a lower wall 2a4 disposed on the lower side. Among these, the right side wall 2a2 is formed with a groove 2a5 through which a drive shaft 7a (described later) of the actuator 7 passes through the right side wall 2a2.

  Further, the upper wall 2a3 of the frame 2 is formed with a fitting groove 2a6 into which an upper fitting protrusion 3e described later of the detachable block 3 is fitted. The inner wall surface in the vehicle width direction of the fitting groove 2a6 contacts both side surfaces of the upper fitting protrusion 3e fitted in the fitting groove 2a6, so that the movement of the detachable block 3 in the vehicle width direction is restricted. The Further, the lower wall 2a4 of the frame 2 is formed with a fitting groove 2a7 into which a lower fitting protrusion 3f (described later) of the detachable block 3 is fitted. The inner wall surface in the vehicle width direction of the fitting groove 2a7 abuts on both side surfaces of the lower fitting protrusion 3f fitted in the fitting groove 2a7, whereby movement of the detachable block 3 in the vehicle width direction is restricted. The

  The upper wall 2a3 and the lower wall 2a4 of these frames 2 are portions facing the detachable block 3 from above and below. That is, in the present embodiment, the fitting groove 2a6 and the fitting groove 2a7 are formed in the upper wall 2a3 and the lower wall 2a4 corresponding to the facing portion.

  The column 2b is disposed at the center of the frame 2 in the vehicle width direction, and is provided to extend in the vertical direction so as to connect the upper wall 2a3 and the lower wall 2a4 of the outer edge 2a. This support | pillar 2b has divided | segmented the area | region enclosed by the outer edge part 2a into the left area | region R1 and the right area | region R2. A shaft portion 2b1 having a circular cross section that is inserted into a shaft hole 5c described later of the flap 5 is provided on a side surface (surface facing the vehicle width direction) of the support column 2b. In the present embodiment, two flaps 5 arranged vertically are arranged in each of the left region R1 and the right region R2. That is, a plurality of flaps 5 are arranged. For this reason, two shaft portions 2b1 arranged in the vertical direction are formed on each of the left side surface and the right side surface of the column 2b. In the following description, the flap 5 disposed in the left region R1 is referred to as a left flap 5A, and the flap 5 disposed in the right region R2 is referred to as a right flap 5B.

  The abutting portion 2 c is a plate-like portion that is in contact with the back surface of the detachable block 3 and is provided at both left and right end portions of the frame 2. The abutting portions 2c are arranged with the front and back surfaces facing the front-rear direction of the vehicle 100, and one contact portion 2c is provided in each of the left region R1 and the right region R2. The contact portion 2c provided in the left region R1 is disposed closer to the left side wall 2a1, and the left side edge is integrated with the back side edge of the left side wall 2a1. The contact part 2c provided in the right region R2 is disposed closer to the right side wall 2a2, and the right side edge part is integrated with the back side edge part of the right side wall 2a2.

  As shown in FIG. 3, the contact portion 2c is provided with a screw insertion hole 2c1 and a vertical direction restriction hole 2c2. The screw insertion hole 2 c 1 is a through hole that penetrates the contact portion 2 c in the front-rear direction of the vehicle 100, and a fastening screw 4 for fastening the frame 2 and the detachable block 3 is inserted therethrough. Two screw insertion holes 2c1 are arranged in the vertical direction with respect to each contact portion 2c. The vertical direction restriction hole 2c2 is a through-hole that is shaped so that the width in the vertical direction becomes narrower toward the back side (the rear side of the vehicle 100), and is formed above the screw insertion hole 2c1. The vertical direction restricting hole 2c2 restricts the vertical movement of the detachable block 3 by inserting a vertical restricting projection 3d, which will be described later, of the detachable block 3 into contact with the upper and lower surfaces of the vertical restricting protrusion 3d. .

  3 is provided in the right region R2 of the frame 2. The contact portion 2c shown in FIG. The contact portion 2c is also provided in the left region R1 of the frame 2 as described above, but the contact portion 2c has the same shape as the contact portion 2c shown in FIG. Explanation here is omitted.

  The detachable block 3 is a block-shaped component that is disposed so that the back surface 3a (see FIG. 4) abuts against the abutment portion 2c in each of the left region R1 and the right region R2 of the frame 2. As shown in FIG. 3, the detachable block 3 has a shaft portion 3b protruding in the vehicle width direction. The shaft portion 3b is inserted into and supported by a shaft hole 5c described later of the flap 5. In the present embodiment, the flap 5 disposed on the upper side of the right region R <b> 2 is a drive flap that is directly connected to the actuator 7. For this reason, the detachable block 3 disposed in the right region R2 has the shaft portion 3b so that the drive shaft 7a of the actuator 7 can be inserted into the shaft hole 5c of the flap 5 disposed on the upper side of the right region R2. Instead, a through hole 3g is formed.

  The detachable block 3 includes a screw hole 3c, a vertical direction restricting protrusion 3d, an upper fitting protrusion 3e, and a lower fitting protrusion 3f. Two screw holes 3 c are arranged in the vertical direction with respect to the back surface 3 a of the detachable block 3. These screw holes 3c are formed at positions that communicate with the screw insertion holes 2c1 of the contact portion 2c when the removable block 3 is in contact with the contact portion 2c of the frame 2. The tip end portion of the fastening screw 4 is screwed into the screw hole 3c. The vertical direction restricting projection 3d is provided on the back surface 3a of the detachable block 3 and is disposed above the screw hole 3c. The vertical restriction protrusion 3d is a protrusion whose width in the vertical direction narrows toward the tip, and when the detachable block 3 is in contact with the contact part 2c of the frame 2, the vertical restriction hole in the contact part 2c. 2c2.

  The upper fitting protrusion 3e is a protrusion protruding upward, and when the detachable block 3 is in contact with the contact portion 2c of the frame 2, the fitting groove 2a6 formed in the upper wall 2a3 of the frame 2 Fitted. The upper fitting protrusion 3e has a width in the vehicle width direction that is set to be substantially the same as that of the fitting groove 2a6. When the upper fitting protrusion 3e is fitted into the fitting groove 2a6, both side surfaces are formed on the inner wall surface of the fitting groove 2a6. Abutted. The lower fitting protrusion 3f is a protrusion protruding downward, and when the detachable block 3 is in contact with the contact portion 2c of the frame 2, the fitting groove 2a7 formed in the lower wall 2a4 of the frame 2 Fitted. The width of the lower fitting projection 3f in the vehicle width direction is set to be substantially the same as that of the fitting groove 2a7. When the lower fitting protrusion 3f is fitted into the fitting groove 2a7, both side surfaces are formed on the inner wall surface of the fitting groove 2a7. Abutted.

  The detachable block 3 shown in FIGS. 3 and 4 is provided in the right region R <b> 2 of the frame 2. The detachable block 3 is also provided in the left region R1 of the frame 2 as described above. The detachable block 3 is bilaterally symmetric with the detachable block 3 shown in FIGS. 3 and 4 and has a shaft portion instead of the through hole 3g. Since it is the same shape except 3b is provided, description here is abbreviate | omitted.

  The fastening screw 4 is a component that fastens the detachable block 3 and the contact portion 2 c of the frame 2. The fastening screw 4 passes through the screw insertion hole 2 c 1 of the contact portion 2 c from the rear side in the front-rear direction of the vehicle 100 and is screwed into the screw hole 3 c of the detachable block 3. By being fastened by the fastening screw 4, the detachable block 3 is fixed to the frame 2 with the back surface 3 a in contact with the contact portion 2 c of the frame 2. As a result, movement of the detachable block 3 in the front-rear direction of the vehicle 100 is restricted by the fastening screw 4.

  Further, by removing such a fastening screw 4, the detachable block 3 can be separated to the front side of the vehicle 100. That is, in the present embodiment, the detachable block 3 is detachable from the contact portion 2c of the frame 2 with the front-rear direction of the vehicle 100 as the detachment direction.

  The flap 5 includes a plate-shaped flap body 5a and end pieces 5b that are provided at both ends and project from the flap body 5a in the vehicle width direction. FIG. 5 is a perspective view of the right flap 5B and the link member 6 as viewed from the left side of FIG. As shown in this figure, end pieces 5b projecting toward the rear of the vehicle 100 are formed at both ends of the right flap 5B (ends on the column 2b side shown in FIGS. 2 and 3). The end piece 5b is connected to the end of the flap body 5a, and a shaft hole 5c into which the shaft 2b1 of the frame 2 or the shaft 3b of the detachable block 3 can be inserted, and a shaft described later of the link member 6. 6a has a shaft hole 5d (link member shaft hole) into which it can be inserted. Moreover, although not shown in figure, the edge piece 5b which protrudes toward the back of the vehicle 100 is formed also in the both ends of 5 A of left flaps. Further, the end piece 5b of the left flap 5A is also connected to the end of the flap body 5a, the shaft hole 5c into which the shaft 2b1 of the frame 2 or the shaft 3b of the detachable block 3 can be inserted, and the link member 6. And a shaft hole 5d into which a shaft portion 6a described later can be inserted. That is, in the present embodiment, the left flap 5A and the right flap 5B have the same shape.

  The shaft portion 3b of the detachable block 3 is rotatably inserted in the left shaft hole 5c of the left flap 5A disposed in the left region R1. Further, the shaft portion 2b1 of the frame 2 is rotatably inserted into the right shaft hole 5c of the left flap 5A, and the shaft portion 6a of the link member 6 is rotatably inserted into the shaft hole 5d.

  The drive shaft 7a of the actuator 7 is inserted into the right shaft hole 5c of the right flap 5B (drive flap) disposed on the upper side of the right region R2, and the drive shaft 7a and the right flap 5B are fixed by an adhesive or the like. ing. In addition, the shaft portion 2b1 of the frame 2 is rotatably inserted into the left shaft hole 5c of the right flap 5B (drive flap), and the shaft portion 6a of the link member 6 is rotatably inserted into the shaft hole 5d. ing.

  The shaft portion 3b of the attachment / detachment block 3 is rotatably inserted into the shaft hole 5c on the right side of the right flap 5B disposed on the lower side of the right region R2. The shaft portion 2b1 of the frame 2 is rotatably inserted into the left shaft hole 5c of the right flap 5B, and the shaft portion 6a of the link member 6 is rotatably inserted into the shaft hole 5d.

  As shown in FIGS. 3 and 5, the link member 6 is a member set in a substantially U shape when viewed from the vertical direction, and is formed of a resin material in the same manner as the frame 2. The link member 6 has a shaft portion 6a that protrudes laterally from each of both ends of the U-shape. These shaft portions 6 a are inserted into the shaft holes 5 d of the flap 5. Such a link member 6 connects the drive flap (the flap 5 disposed on the upper side of the right region R <b> 2) and the other flap 5, and transmits the movement of the drive flap to the other flap 5. Thereby, all the flaps 5 are rotationally driven in synchronization.

  The actuator 7 includes a motor and a solenoid that generate power, and a drive shaft 7a that outputs the generated power. The drive shaft 7a of the actuator 7 is detachable from the main body. The tip is inserted into the shaft hole 5d of the drive flap and is fixed to the drive flap.

  The sensor 8 is fixed to the back surface of the contact portion 2c in the right region R2. The sensor 8 is disposed at a position facing the right end piece 5b of the right flap 5B disposed on the lower side in the right region R2. The sensor 8 acquires position information of the shaft hole 5d formed in the opposed end piece 5b and outputs it as a detection result, and is composed of, for example, an image sensor or a laser sensor. The detection result output from the sensor 8 is input to, for example, an engine control unit. For example, the engine control unit determines the posture of the flap 5 based on the input detection result. As described above, the grill shutter 1 of the present embodiment includes the sensor 8 that detects the position of the shaft hole 5d in which the shaft portion 6a of the link member 6 is not inserted.

  When assembling the grill shutter 1 of the present embodiment configured as described above, the flap 5 is first attached to the frame 2 from the oblique front side so that the shaft portion 2b1 of the support column 2b is inserted into the shaft hole 5c of the flap 5. Plug into the enclosed area. The shaft hole 5c is naturally slightly larger in diameter than the shaft portion 2b1 since the shaft portion 2b1 is inserted. For this reason, the flap 5 can be inserted obliquely from the front. The shaft portion 2b1 and the shaft hole 5c may have a barrel shape so that the shaft portion 2b1 of the column 2b can be easily inserted into the shaft hole 5c.

  Subsequently, the detachable block 3 is attached so that the shaft hole 5c of the flap 5 is inserted into the shaft portion 3b of the detachable block 3 (or the drive shaft 7a inserted through the through hole 3g of the detachable block 3). Thereafter, the detachable block 3 is attached to the frame 2 so that the back surface 3 a of the detachable block 3 contacts the contact portion 2 c of the frame 2. At this time, the upper fitting projection 3e of the detachable block 3 is fitted into the fitting groove 2a6 formed on the upper wall 2a3 of the frame 2, and the lower fitting projection 3f is fitted to the lower wall 2a4 of the frame 2. The vertical restricting projection 3d is inserted into the vertical restricting hole 2c2 formed in the contact portion 2c, and the detachable block 3 is positioned with respect to the frame 2 by being fitted into the groove 2a7. Further, the detachable block 3 and the frame 2 are fastened by the fastening screw 4. Furthermore, the assembly of the grille shutter 1 of this embodiment is completed by connecting the main body of the actuator 7 and bending and attaching the link member 6.

  In the grill shutter 1 of this embodiment having such a configuration, the actuator 7 is controlled by an engine control unit (not shown), and the power generated by the actuator 7 is transmitted to the flap 5 so that the flap 5 is opened and closed. Thereby, the supply state of the outside air to the engine room is changed.

  According to the grill shutter 1 of the present embodiment as described above, the left flap 5A and the right flap 5B have the same shape. For this reason, when attaching the flap 5, it becomes unnecessary to perform the operation | work which confirms whether it is the left flap 5A or the right flap 5B. Further, the left flap 5A and the right flap 5B can be formed by one mold. Furthermore, the dimensional accuracy of the left flap 5A and the right flap 5B can be confirmed with one gauge. Therefore, according to the grill shutter 1 of the present embodiment, it is possible to prevent deterioration in efficiency of assembly work and increase in manufacturing cost due to the difference in shape between the left flap and the right flap.

  Further, in the grill shutter 1 of the present embodiment, the flap 5 includes a flap body 5a and end pieces 5b that are disposed at both ends of the flap 5 and connected to the end portions of the flap body 5a. The end piece 5b has a shaft hole 5c into which the shaft portion 3b or the shaft portion 2b1 for pivotally supporting the flap body 5a is inserted. For this reason, the shaft hole 5c into which the shaft portion 2b1 is inserted can be inserted into either the right end or the left end of the flap 5. Therefore, it is possible to adopt a configuration in which the left flap 5A and the right flap 5B have the same shape with a simple shape.

  Further, in the grill shutter 1 of the present embodiment, each of the end pieces 5b arranged at both ends of the flap 5 has a shaft hole 5d into which the shaft portion 6a of the link member 6 can be inserted. For this reason, it becomes possible to connect the link member 6 with respect to the flap 5, and it becomes possible to employ | adopt the structure which drives all the flaps 5 synchronously easily.

  In addition, in the grill shutter 1 of the present embodiment, the grill shutter 1 of the present embodiment includes a sensor 8 that detects the position of the shaft hole 5d in which the shaft portion 6a of the link member 6 is not inserted. For this reason, the shaft hole 5d that is not used in the grill shutter 1 after assembly can be effectively used as a detection target of the sensor 8. A reflective material or the like may be installed in the shaft hole 5d to be detected by the sensor 8 so that detection by the sensor 8 is easy.

  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-described embodiment, the configuration in which two flaps 5 arranged in the upper and lower directions are provided in each of the left region R1 and the right region R2 has been described. However, the present invention is not limited to this, for example, a grille shutter in which only one flap is installed in each of the left region R1 and the right region R2, or each of the left region R1 and the right region R2. It is also possible to apply to a grill shutter in which three or more flaps are arranged.

  Moreover, in the said embodiment, the attachment / detachment block 3 was made detachable with respect to the flame | frame 2, and the structure which the other end of the flap 5 was connected to the flame | frame 2 via the attachment / detachment block 3 was demonstrated. However, the present invention is not limited to this, and a structure in which the flap 5 is directly connected to the frame 2 without providing the detachable block 3 can also be adopted. In such a case, for example, the flap 5 is bent and attached to the frame.

  Moreover, in the said embodiment, the structure which installs the sensor 8 was employ | adopted. However, the present invention is not limited to this, and a configuration in which the sensor 8 is not installed can be employed.

  DESCRIPTION OF SYMBOLS 1 ... Grill shutter, 2 ... Frame, 2a ... Outer edge part, 2a1 ... Left side wall, 2a2 ... Right side wall, 2a3 ... Upper wall, 2a4 ... Bottom wall, 2a5 ... Groove, 2a6 ... Fit Joint groove, 2a7 ... fitting groove, 2b ... support, 2b1 ... shaft part, 2c ... contact part, 2c1 ... screw insertion hole, 2c2 ... vertical restriction hole, 2d ... stopper, 3 ... Detachable block, 3a ... Back, 3b ... Shaft, 3c ... Screw hole, 3d ... Vertical restriction projection, 3e ... Upper fitting projection, 3f ... Lower fitting projection, 3g ... Through hole 4 ... Fastening screw, 5 ... Flap, 5A ... Left flap, 5B ... Right flap, 5a ... Flap body, 5b ... End piece, 5c ... Shaft hole, 5d ... Shaft hole (link) (Shaft hole for member), 6 ... link member, 6a ... shaft, 7 ... actuator, 8 ... sensor, 1 0 ...... vehicle

Claims (3)

A grill shutter for a vehicle that is rotatably connected to the frame and includes a plurality of flaps,
The flap includes a left flap disposed on the left side in the vehicle width direction and a right flap disposed on the right side in the vehicle width direction,
A link member disposed between the left flap and the right flap and having a plurality of shaft portions projecting sideways;
The left flap and the right flap have the same shape ,
The flap has a flap body, and an end piece disposed at each end of the flap and connected to the end of the flap body,
Each of the end pieces has a shaft hole into which a shaft portion that pivotally supports the flap main body is inserted,
Each of the shaft holes has the same hole diameter,
Each of the end pieces has a link member shaft hole into which the shaft portion of the link member can be inserted,
Each of the link member shaft holes has the same hole diameter,
The grille shutter , wherein the shaft portion of the link member is inserted into one of the link member shaft holes of the end pieces disposed at both ends of the flap . Grille shutter according to claim 2, characterized in that said end piece is disposed on each opposing end of said flap. The grille shutter according to claim 1 or 2, further comprising a sensor that detects a position of a link member shaft hole into which the shaft portion of the link member is not inserted.

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