JP2009184651A - Hood hinge mounting structure for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide hood hinge mounting structure for an automobile capable of improving hood hinge mounting workability by eliminating a dedicated tool and the like for mounting and eliminating alignment of bolt holes, and enhancing safety by lowering an injury value in collision of a pedestrian with a hood despite a lower manufacturing cost. <P>SOLUTION: In the hood hinge mounting structure 1 for an automobile, a hood hinge 3 is mounted to a hood 2 by fixing bolts 5 to a hinge retainer 4 so as to face downward beforehand, fixing it to a hood inner panel 2a, integrating the hood inner panel 2a and the bolts 5 beforehand, projectingly arranging thread parts 5c of the bolts 5 from the lower face of the hood inner panel 2a, and attaching and tightening by nuts 6 the hood hinge 3 to the thread parts 5c. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mounting structure of a hood that is rotatably mounted on an engine room via a hood hinge, and more particularly to a mounting structure of a bolt used for mounting the hood, and an injury value when a pedestrian collides with the hood. It is related with the hood hinge attachment structure of the motor vehicle which can reduce.

Conventionally, as shown in FIG. 4, in a vehicle having an engine room E <b> 1 in an automobile front part C <b> 1, a hood 102 that covers the engine room E <b> 1 is rotatably attached to the engine room E <b> 1 via a hood hinge 103. Yes.
The hood 102 includes a hood inner panel 102a and a hood outer panel 102b. As shown in FIG. 5, a conventional mounting structure 101 of the hood hinge 103 to the hood 102, that is, a conventional hood hinge mounting structure 101 of an automobile is a plate-like hinge retainer 104 having a L-shaped cross section in the vehicle width direction. A hood hinge 103 is laminated on the lower side of the hood inner panel 102a, and the bolts 105 are inserted upward from below into bolt holes that have been previously drilled in the hood inner panels 102a. It is formed by joining together.

At the time of this attachment, as shown in FIG. 5, third bolt holes 104a and 104b for inserting the bolt 105 are formed in the hinge retainer 104 in advance, and the third bolt hole 104a. , 104b, and the nut 106 is welded and fixed.
Further, the hinge retainer 104 to which the nut 106 is fixed is laminated on the hood inner panel 102a, and the positions of the third bolt holes 104a and 104b are aligned with the second bolt holes 102c and 102d that have been previously penetrated through the hood inner panel 102a. In this way, the hinge retainer 104 and the hood inner panel 102a are welded and integrated with each other.

  Thereafter, as shown in FIG. 5, the hood hinge 103 having the first bolt hole 103a (103b) penetrated is overlapped with the hood inner panel 102a by aligning the bolt holes with each other from the lower surface side. The first bolt hole 103a (103b), the second bolt hole 102c (102d), and the third bolt hole 104a (104b) are inserted in this order from the lower side of the bolt 105 and fixed to the top. The nut 106 is screwed and fastened.

  However, in the conventional mounting structure of the hood hinge 103, the bolt holes drilled in the hinge retainer 104, the hood inner panel 102a, and the hood hinge 103 must be aligned with each other. In particular, the positioning when the nut 106 is fixed to the upper surface of the hinge retainer 104 is a difficult operation, and has been a factor that significantly reduces the workability.

  In addition, a dedicated positioning jig is used for positioning the conventional nut 106 and the third bolt holes 104a and 104b penetrating the hinge retainer 104 and positioning the hinge retainer 104 and the hood inner panel 102a. Necessary, and it was also necessary to produce a dedicated jig for each vehicle type.

  Further, since the bolt 105 in the conventional hood hinge mounting structure 101 is inserted upward from the hood hinge 103 side, that is, from the lower side, the tip of the bolt 105 projects upward together with the nut 106 directly below the hood outer panel 102b. ing. For this reason, when a falling object collides violently with the hood 102, the rod portion 105b or the nut 106 of the bolt 105 may protrude through the hood outer panel 102b. In order to prevent such a situation, conventionally, the hinge retainer 104 is provided with a flange portion 104b higher than the rod portion 105b of the bolt 105 and has an L-shaped cross section as described above, thereby reducing the injury value when a pedestrian collides. The aspect which reduces is taken. Therefore, a certain amount of clearance is required between the hood inner panel 102a and the hood outer panel 102b, that is, the hood 102 requires a certain height, which is a design limitation.

  The present invention was created in view of the above problems, and eliminates the need for positioning of the bolt holes while eliminating the need for dedicated jigs for mounting, thereby improving the mounting workability of the hood hinge. An object of the present invention is to provide an automobile hood hinge mounting structure that can improve safety by reducing the injury value when a pedestrian collides with the hood while improving the manufacturing cost.

  In order to achieve the above object, the present invention provides a hood mounting structure that is rotatably mounted on an engine room via a hood hinge, the hood comprising a hood outer panel and a hood inner panel, and a lower surface of the hood inner panel. A hood hinge fastened to the vehicle body, a hinge retainer attached to a surface of the hood inner panel facing the hood hinge, a bolt that penetrates the hinge retainer, the hood, and the hood hinge downward and fastens; A bolt comprising a head and a rod portion standing upright in the center of one side of the head, the rod portion being substantially the same as the diameter of a third bolt hole penetrating through the hood hinge A base end portion having an outer diameter of 5 mm and a threaded portion having an outer diameter smaller than the base end portion, and the length of the base end portion is determined between the hinge retainer and the hood inner panel. Longer than the thickness of the gauge, it is characterized in shorter than the total thickness of the hinge retainer and the hood inner panel and a hood hinge.

  The bolt is preferably fixed to the hinge retainer by welding.

  The hinge retainer is preferably fixed to the hood inner panel by welding.

  The first bolt hole penetrated in the hinge retainer and the second bolt hole penetrated in the hood inner panel may have an outer diameter substantially equal to the diameter of the third bolt hole penetrated in the hood hinge. desirable.

  The rod portion erected at the center of one side of the bolt head is composed of a relatively large diameter proximal end portion and a relatively small diameter threaded portion, and the length of the proximal end portion is determined by a hinge retainer and a hood inner panel. Is longer than the total thickness of the hinge retainer, the hood inner panel, and the hood hinge, and the diameter of the bolt hole drilled in the hood hinge is set to the outer diameter of the base end. This bolt is fixed by welding in advance while inserting the bolt downward into the bolt hole of the hinge retainer, and the hood inner panel and the hood hinge are inserted through the rod portion of the bolt protruding downward from the lower surface of the hinge retainer as appropriate. Finally, since the nut is screwed into the screwed portion of the bolt protruding from the lower surface side of the hood hinge, it is not necessary to align the bolt holes in advance. Without the need for a positioning jig, the bolt holes can be aligned by simply inserting the bolt holes of the hinge retainer, the bolt holes of the hood inner panel, and the bolt holes of the hood hinge in order into the bolt rod. As a result, it is possible to obtain a strong insertion state equivalent to or higher than that of the above-mentioned one, to significantly shorten the work time for mounting and to improve workability.

  Further, according to the present invention, since the bolt is attached downward, when the pedestrian collides with the hood, the rod portion of the bolt does not break through the hood outer panel and give an injury value to the pedestrian.

  Furthermore, since the head portion of the bolt is fixed to the hinge retainer by welding, it may be configured to have a thickness, size, or strength that can be fixed by welding. Therefore, it is not necessary to be able to pinch the bolt head with a screwing tool such as a wrench like a conventional bolt, and there is no need for a corner or thickness, and a thin plate-like head Can be set to As a result, the hinge retainer does not require an L-shaped structure for preventing the hood outer panel from being pierced by a bolt rod portion or a nut as in the prior art, and can be formed into a flat plate shape.

  If the hole diameters of the bolt holes drilled in the hinge retainer and hood inner panel are configured to be the same as the outer diameter of the bolt hole holes drilled in the hood hinge, these hole diameters are the same as the outer diameter of the base end. Therefore, it can be easily aligned with the bolt hole of the hinge retainer and the bolt hole of the hood inner panel.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3. In the present embodiment, the vehicle hood hinge mounting structure 1 of the present invention will be described by taking a vehicle of the type having an engine room E at the front portion C of the vehicle as an example.

The automobile of this embodiment has an engine room E in the front part of the vehicle. The engine room E is a space in which an upper part for storing an engine (not shown) and the like that are defined by a dash panel (not shown) in front of a vehicle compartment (not shown) separated from the vehicle compartment.
The hood hinge mounting structure 1 of this embodiment includes a hood 2 that closes an opening at the top of the engine room E, and a hood hinge 3 that rotatably connects the hood 2 to a vehicle body. Note that Up and Fr in the figure represent the upper and front sides, respectively.

  The hood 2 is located directly above the engine room E and has a substantially plate shape as a whole. The hood 2 covers the entire opening at the top of the engine room E and closes like a canopy, and is positioned above the hood inner panel 2a And the hood outer panel 2b exposed to the outside, and these are stacked and integrated with each other. The other end of the hood hinge 3 whose one end is fixed to a predetermined position at the rear upper part of the engine room E is fixed to a predetermined portion of the rear end portion of the hood 2, and the hood 2 is attached to the vehicle body via the hood hinge 3. Attached to be rotatable.

  As shown in FIG. 1, the hood 2 and the hood hinge 3 are attached to a hood inner panel 2a, a hinge retainer 4 fixed to the upper surface in advance, and a hood attached in contact with the lower surface of the hood inner panel 2a. The hinge 3 is provided with bolts 5 and 5 and nuts 6 and 6 for fastening these members.

The hinge retainer 4 is a substantially flat plate member made of a steel material, and is a member for reinforcing a portion of the hood inner panel 2a to which the hood hinge 3 is attached. The hinge retainer 4 is provided with first bolt holes 4a and 4b penetrating front and back at appropriate portions. In the present embodiment, first bolt holes 4a and 4b are formed at two front and rear positions in the vicinity of the rear portion of the hinge retainer 4. Here, the hinge retainer 4 has a flat plate shape. However, the hinge retainer 4 is not limited to a flat plate shape, and may be formed in an L-shaped cross section like a conventional hinge retainer, for example.
Before the hinge retainer 4 is attached to the upper surface of the hood inner panel 2a, the bolts 5 and 5 are inserted downward into the first bolt holes 4a and 4b, and the bolts 5 and 5 are fixed to the hinge retainer 4 by welding. The

  As shown in FIG. 2, the bolt 5 includes a head portion 5a and a rod portion 5b erected at the center of one surface of the head portion 5a. The head 5a has a thin disk shape with sufficient strength and area. The rod portion 5b is formed in a columnar base end portion 5c having a predetermined outer diameter and a predetermined length, a bent portion 5d formed at the tip thereof, and an outer diameter smaller than that of the base end portion 5c. The threaded portion 5e is threaded.

  The outer diameter of the base end portion 5c is penetrated through the first bolt holes 4a and 4b penetrated through the hinge retainer 4, the second bolt holes 2c and 2d penetrated through the hood inner panel 2a, and the hood hinge arm 3a. It is set substantially equal to the hole diameter of the third bolt holes 3b, 3c. The length of the base end portion 5c is set to be longer than the total thickness of the hinge retainer 4 and the hood inner panel 2a and shorter than the total thickness of the hinge retainer 4, the hood inner panel 2a and the hood hinge arm 3a. ing.

  At the distal end of the base end portion 5c, a bend portion 5d whose outer diameter is slightly tapered toward the distal end is formed. A screwing portion 5e having a spiral groove formed on the outer peripheral surface is provided at the tip of the bent portion 5d. The nut 6 is finally screwed into the screwing portion 5e.

  The nut 6 is screwed into a screwing portion 5e formed at the tip of the bolt 5, and the outer shape is a substantially regular hexagonal column shape, and the inside is hollowed out into a substantially cylindrical shape and spiraled around its inner peripheral surface. A groove is formed, and a hook-like portion 6a is formed on one end surface in the cylindrical direction.

  In the vicinity of the rear end of the hood inner panel 2a, second bolt holes 2c and 2d are drilled at two front and rear positions corresponding to the first bolt holes 4a and 4b drilled in the hinge retainer 4. As described above, the second bolt holes 2c and 2d are set to have a hole diameter substantially equal to the outer diameter of the base end portion 5c of the bolt 5.

  As shown in FIG. 3, the hood hinge 3 includes a hood hinge arm 3 a formed by bending a substantially plate-like member fixed to the hood 2 side into an appropriate shape, and a hinge plate 3 d fixed to the vehicle body side. Are combined in a hinge shape. In the vicinity of the tip of the hood hinge arm 3a, third bolt holes 3b, 3c are drilled at two front and rear positions corresponding to the second bolt holes 2c, 2d drilled in the hood inner panel 2a.

  First, the bolts 5 and 5 are inserted through the first bolt holes 4a and 4b drilled in the hinge retainer 4 and fixed to each other by welding. Next, the lower surface of the hinge retainer 4 and the upper surface of the hood inner panel 2a are brought into contact with the second bolt holes 2c and 2d formed in the hood inner panel 2a while the tips of the bolts 5 and 5 are inserted downward. The hinge retainer 4 and the hood inner panel 2a are fixed to each other by welding. In this way, the third hood hinge arm 3a of the hood hinge 3 is drilled at the tip of the bolts 5 and 5 protruding downward from the second bolt holes 2c and 2d from the lower surface side of the hood inner panel 2a. While inserting the bolt holes 3b and 3c, the lower surface of the hood hinge arm 3a and the upper surface of the hood inner panel 2a are brought into contact with each other, and the nut 6 is screwed from the tip of the bolt 5 and fastened from the hook-shaped portion 6a side. To do.

  As described above, in the automobile hood hinge mounting structure 1 of the present invention, the bolt 5 is fixed to the hinge retainer 4 downward in advance, and this is fixed to the hood inner panel 2a, and the hood inner panel 2a and the bolt 5 are fixed. Are integrated in advance, and a screwed portion 5c of a bolt 5 is projected from the lower surface of the hood inner panel 2a. The hood hinge 3 is attached to the screwed portion 5c, and then tightened with a nut 6. Thus, the hood hinge 3 is attached to the hood 2 and can be implemented in various forms without departing from the gist thereof. For example, in the present embodiment, arc welding, spot welding, friction stir welding, rivet welding, or the like can be selected depending on the situation.

In this embodiment, it is sectional drawing of the principal part which shows the structure of the hood hinge attachment structure of a motor vehicle. It is sectional drawing along the AA in FIG. It is a top view of a hood hinge. It is sectional drawing of the principal part which shows the hood hinge attachment structure of the conventional motor vehicle. It is sectional drawing along the BB line in FIG.

Explanation of symbols

1 Automotive Hood Hinge Mounting Structure 2 Hood 2a Hood Inner Panel 2b Hood Outer Panel 2c, 2d Second Bolt Hole 3 Hood Hinge 3a Hood Hinge Arm 3b, 3c Third Bolt Hole 3d Hinge Plate 4 Hinge Retainer 4a, 4b First Bolt 5 Bolt 5a Head 5b Rod 5c Base end 5d Bending portion 5e Screwed portion 6 Nut 6a Wedge C Car front part E Engine room C1 Car front part E1 Engine room

Claims (4)

A hood mounting structure that is rotatably mounted on the engine room via a hood hinge,
A hood comprising a hood outer panel and a hood inner panel, a hood hinge fastened to the lower surface of the hood inner panel and connecting the hood to the vehicle body, and a hinge retainer attached to a surface of the hood inner panel facing the hood hinge And a bolt and a nut that pass through and fasten the hinge retainer, the hood, and the hood hinge downward,
The bolt is composed of a head and a bar portion erected at the center of one side of the head,
The rod portion has a base end portion having an outer diameter substantially equal to the hole diameter of the third bolt hole penetrating the hood hinge, and a screwing portion having an outer diameter smaller than the base end portion,
The length of the base end is longer than the total thickness of the hinge retainer and the hood inner panel, and shorter than the total thickness of the hinge retainer, the hood inner panel, and the hood hinge. Car hood hinge mounting structure.   The hood hinge mounting structure for an automobile according to claim 1, wherein the bolt is fixed to the hinge retainer by welding.   The hood hinge mounting structure for an automobile according to claim 1 or 2, wherein the hinge retainer is fixed to the hood inner panel by welding.   The first bolt hole penetrating through the hinge retainer and the second bolt hole penetrating through the hood inner panel have an outer diameter substantially equal to the diameter of the third bolt hole penetrating through the hood hinge. The hood hinge mounting structure for an automobile according to any one of claims 1 to 3, further comprising: