JP2011005990A - Hood structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which hardly causes stress concentration at a spot welded position when mounting a striker base of an engine hood and to enable use of the striker base as a common part.SOLUTION: The hood structure for the vehicle includes an inner panel fixed to a lower side of an outer panel, a striker reinforcement 8 fixed to the inner panel, the striker base 7 fixed by spot welding and the striker 6 fixed to the striker base 7 so as to protrude to an engine room side. A rear end side vertical wall part 82 and a front side vertical wall part 83 are respectively arranged at a front end part and a rear end side of the striker reinforcement 8 and a beat part 84 is formed to continue between both the vertical wall parts 82, 83. An upper face of this beat part 84 forms a beat seat face 85 and the striker base 7 is loaded on the beat seat face 85 and fixed by spot welding.

Description

  The present invention relates to a structure of a vehicle hood configured to include an outer panel and an inner panel.

  A vehicle hood generally has a structure in which an outer panel and an inner panel are combined. A striker is provided between the outer panel and the inner panel so as to protrude downward in the vehicle.

  FIG. 6 shows a conventional vehicle hood structure.

  In the conventional vehicle hood structure, as shown in FIG. 6, the vehicle hood F is formed by fixing the inner panel 101 to the vehicle lower side of the outer panel 100. In the figure, the arrow FR indicates the front side of the vehicle, and the arrow UP indicates the upper side of the vehicle.

  On the front side of the vehicle hood F, a striker 102 is protruded and fixed downward. The striker 102 fixes the vehicle body and the vehicle hood F. A plate-like striker reinforcement 103 is fixed to the inner panel 101 on the outer panel 100 side, and a striker base 104 for fixing the striker 102 is fixed to the outer panel 100 side of the striker reinforcement 103. It is. The striker 102 is fixed to the striker base 104.

  FIG. 7 is an exploded perspective view of the vehicle hood F viewed obliquely from above with the outer panel 100 removed. The inner panel 101 has a structure in which the front side of the vehicle protrudes toward the vehicle lower side and includes a protruding portion 101a, and the rear side of the protruding portion 101a includes a wall portion 101b that extends upward in the vehicle.

  In the vehicle hood F, as shown in FIG. 7, the striker reinforcement 103 is fixed to the upper surface (side surface of the outer panel 100) of the protrusion 101a by spot welding or the like. Further, the striker base 104 is fixed to the upper surface (side surface of the outer panel 100) of the striker reinforcement 103. The striker 102 is fixed to the striker base 104 so as to pass through the striker reinforcement 103 and the inner panel 101 and protrude downward in the vehicle.

  And the inner panel 101 and striker reinforcement 103 fix a predetermined location by spot welding. Similarly, the striker reinforcement 103 and the striker base 104 are fixed at predetermined locations by spot welding.

  In spot welding of the striker base 104 to the striker reinforcement 103, as shown in FIG. 8, a spot weld surface 105 is formed, and the spot weld surface 105 is welded by an automatic welding robot or the like as a spot weld location.

  The spot welding surface 105 is formed so as to protrude in a convex shape toward the striker base 104 (upper side) when the striker reinforcement 103 is pressed.

  In assembling the vehicle hood F, the striker base 104 is placed on the striker reinforcement 103, the spot welded surface 105 formed by projecting as described above is spot welded, and the striker reinforcement 103 and The striker base 104 was fixed. FIG. 9 shows a state in which the striker reinforcement 103 and the striker base 104 are fixed, and a spot welded portion is indicated by B in the figure. FIG. 10 is a cross-sectional explanatory view in which the vehicle hood F is assembled and is cut out in the left-right direction of the vehicle. FIG. 10A shows a normal time after the vehicle hood F is closed, and FIG. Indicates the state of stress generation at the moment when inertia is applied to the vehicle hood F at the moment when the vehicle hood F is closed.

  When the vehicle hood F shown in FIG. 10A is normally stationary, the striker 102 is locked with the vehicle body, and the spot welded portion B of the striker reinforcement 103 and the striker base 104 is pulled downward. It remains stationary.

  However, in order to bring the vehicle hood F into the closed state, the vehicle hood F is normally closed from the position where the vehicle hood F is moved upward toward the automobile body with the vehicle rear side as the center of rotation. The closed state is shown in FIG. 10B. At the instant when the closed state is reached, the striker 102 abuts against the vehicle body side and the movement is restricted. The inner panel 101, the striker reinforcement 103, etc. try to move downward due to inertia, and the striker base 104 has a portion other than the substantially center where the striker 102 is fixed at the welded portion B with the striker reinforcement 103. It tries to move further downward as it is pulled. Then, a stress is generated at the welded portion B so as to be pulled downward in the vehicle, and a stress concentration is generated around the welded portion B. This is considered to be due to the fact that the portion other than the spot welded surface 105 formed by protruding the striker reinforcement 103 is a flat plate-like body and does not have a resistance against bending deflection. .

  In addition, conventionally, since the spot welded surface 105 is processed at a plurality of locations when the striker reinforcement 103 is pressed, there is a problem in that the height of each spot welded surface 105 varies at the end of pressing. . Then, spot welding is performed by combining the spot welding surface 105 and the striker base 104 with a variation in height. Then, since the spot welded surface 105 and the striker base 104 that have floated with the striker base 104 placed on the spot welded surface 105 are spot welded at the spot welded surface 105, the striker reinforcement 103 and the striker There is a problem in that stress concentration occurs because spot welding is performed by applying a force to the base 104 to bend. As a result, the striker reinforcement 103 and the striker base 104 have problems such as cracks.

  FIG. 11 shows the stress concentration state in the periphery of the welded portion B, and shows that the stress is concentrated in the portion where the color is darker in the drawing.

  Further, in order to cope with the occurrence of the trouble due to such stress concentration, as shown in FIG. 12, a device for further increasing the number of spot welds has been devised. However, since it is necessary to increase the thickness of the striker reinforcement 103 itself, there is a problem that the manufacturing cost increases and the vehicle weight increases.

  Conventionally, since the shape of the inner panel 101 is different for each vehicle type, the shape of the striker reinforcement 103 is also different for each vehicle type. Therefore, the striker base 104 must be prepared for each vehicle type. There was a problem that it could not be used in common.

  Therefore, in view of the above problems, the present invention provides a vehicle hood structure that does not increase the manufacturing cost and the vehicle weight, and disperses the stress so that the stress is not concentrated on the welded portion of the striker reinforcement.

  In order to solve the above-described problems, the structure of a vehicle hood provided by the present invention includes an outer panel that is an outer plate of an engine hood that rotates around one end side and covers an engine room so as to be openable and closable. An inner panel which is an inner plate of the hood and is fixed to the lower side of the outer panel; and the inner panel disposed on the outer panel side of the inner panel and on the side opposite to the rotating shaft side of the inner panel; A striker reinforcement that is provided with a plurality of convex beat portions that are fixed in the front-rear direction so that the upper surface is the beat seating surface with appropriate spacing, and a striker that is secured to the beat seating surface of the striker reinforcement. A base, and a striker fixed to the striker base and projecting downward in the engine hood.

Furthermore, in this invention,
The inner panel fixed to the lower side of the outer panel and the striker reinforcement are erected on the outer panel side on the side opposite to the rotating shaft end side and / or the rotating shaft end side of the inner panel. Provided is a vehicle hood structure provided with a vertical wall portion, wherein the beat portion is provided up to the side of the inner panel opposite to the rotation shaft end side and / or the vertical wall portion on the rotation shaft end side.

  As described above, the striker reinforcement is provided with a convex beat section that is continuous in the longitudinal direction of the vehicle, so that the rigidity of the striker reinforcement can be increased, so the engine hood closes the engine room from the open state. By restricting the striker movement at the moment when it is in a state, it is possible to disperse the stress concentration that occurs between the striker base and striker reinforcement due to inertia, and around the joint between the striker base and striker reinforcement It is possible to prevent a problem that a crack is generated in the like.

  In addition, since the beat bearing surface formed in the beat section is continuous, there is no deviation in the position where spot welding is performed when welding the striker base, enabling good welding work, leading to improved product quality. It has the effect.

  Further, since the beat portion formed in the striker reinforcement hardly causes an error during press working, the striker base can be made a common component.

Explanatory drawing showing the front of the car Longitudinal cross-sectional explanatory view showing a state where the engine hood of the embodiment is cut so that the front-rear direction appears Partially enlarged perspective explanatory view showing the assembled state of the embodiment Explanatory drawing showing the state of stress distribution Partially enlarged perspective explanatory view showing the embodiment Longitudinal cross-sectional explanatory view showing a state where a conventional engine hood is cut so that the front-rear direction appears Exploded perspective view showing a conventional example viewed obliquely from above Partially enlarged perspective view showing the assembled state of the conventional example Partially enlarged perspective explanatory view showing a conventional example Cross-sectional explanatory drawing showing a conventional example Explanatory drawing showing the conventional stress distribution state Partially enlarged perspective view showing the assembled state of the conventional example

  Reference numeral 1 denotes a vehicle. In this embodiment, the automobile 1 will be described as an example. FIG. 1 is an explanatory view showing a front portion of the automobile 1. In the directions indicated by arrows in FIG. 1, the arrow F is the front side, and the arrow R is the rear side. Similarly, the arrow UP is the upper side, the arrow DW is the lower side, the arrow R is the right side, and the arrow L is the left side.

  The automobile 1 includes an engine room 2 in front, and the engine hood 3 covers the upper surface of the engine room 2 so that the engine room 2 can be opened and closed. The engine hood 3 can be opened and closed with the rear side as a rotation axis and the front side as a free end.

  The structure of the engine hood 3 is the same as that of a conventional automobile.

  As shown in FIG. 2, the engine hood 3 is formed by an outer panel 4 that is an outer plate portion of the engine hood 3 and an inner panel 5 that is fixed to the outer panel 4 inside the outer panel 4.

  The outer panel 4 is press-molded using a thin steel plate so as to cover the engine room 2.

  The inner panel 5 is joined by welding or the like at the periphery or the like so as to be positioned on the lower surface of the outer panel 4. The inner panel 5 is also press-formed using a thin steel plate. Since the engine hood 3 maintains rigidity by the outer panel 4 and the inner panel 5, the inner panel 5 is provided with a reinforcement portion (not shown) in consideration of torsional rigidity and the like, and the engine hood 3 is lightweight. In order to make it easier, unnecessary portions are removed.

  The engine hood 3 is provided with a striker 6 as a lock mechanism for fixing to the front end portion of the automobile 1 when the engine room 2 is covered. In this embodiment, the striker 6 that is normally used is disposed below the engine hood 3. It is fixed by protruding. Accordingly, a through hole (not shown) for projecting the striker 6 is formed on the front end side of the inner panel 5.

  Each of the outer panel 4, the inner panel 5, and the striker 6 has a structure that is not different from a conventional product.

  The striker 6 has a quadrangular shape penetrating the center, and is usually used by bending a rod-shaped body. Similar to the inner panel 5, the striker 6 has an upper end fixed to a striker base 7 made of a thin steel plate by arc welding or the like.

  The striker base 7 is fixed to the inner panel 5 via a striker reinforcement 8 formed by pressing a thin steel plate.

  Next, the structure of the striker reinforcement 8 and the fixing of the striker base 7 to the striker reinforcement 8 will be described.

  As shown in FIG. 3, the striker reinforcement 8 includes a base portion 81 that can be fixed on the inner panel 5, and includes a rear end side vertical wall portion 82 that is bent upward at the rear side of the base portion 81. Similarly, the front side of the base portion 81 is also bent upward and includes a front end side vertical wall portion 83.

  Then, a beat portion 84 is projected from the rear end side vertical wall portion 82 to the front end side vertical wall portion 83. When the striker reinforcement 8 is press-molded, the beat part 84 is press-molded at the same time, and protrudes upward from the rear end side vertical wall part 82 to the front end side vertical wall part 83. The beat portion 84 increases the rigidity of the striker reinforcement 8.

  The beat portion 84 is press-molded so that the upper surface is flat, the upper surface is a beat seat surface 85, and the side surface is a rigid wall portion 86 for increasing rigidity. Further, by providing the beat portion 84 from the rear end side vertical wall portion 82 to the front end side vertical wall portion 83, the rear end side vertical wall portion 82, the front end side vertical wall portion 83, and the beat portion 84 serve as striker reinforcement 8. Therefore, the physical rigidity is increased. The beat portion 84 may be formed up to any one of the vertical wall portions 82 and 83, and the rear end side vertical wall portion 82 and the front end side vertical wall portion 83 are not necessarily provided. It is sufficient to provide reinforcement 8 so as to ensure physical rigidity.

  Further, in this embodiment, the beat portions 84 are provided approximately in parallel at two locations in the left-right direction. The interval between the beat portions 84 is set to an appropriate interval at which the striker base 7 can be laid across the beat seat surfaces 85 of both the beat portions 84. In this embodiment, as shown in FIGS. 3 and 4, the beat portion 84 is provided so as to be slightly inclined in the left-right direction from the front end side vertical wall portion 83 to the rear end side vertical wall portion 82. However, it may be provided straight from the front end side vertical wall portion 83 to the rear end side vertical wall portion 82 without shifting from side to side, and may be provided as appropriate in consideration of the force applied to the engine hood 3.

  Further, the striker reinforcement 8 is provided with a through hole 87 between the two beat portions 84 of the base portion 81 so that the striker 6 protrudes downward. The through hole 87 is opposed to a through hole (not shown) drilled in the inner panel 5, and the striker 6 protrudes downward through the through holes.

  As shown in FIG. 5, the striker base 7 and the striker reinforcement 103 are placed on the beat seating surface 85 of the striker reinforcement 8 to the predetermined spot welding position indicated by B in the figure. Fix by spot welding. Of course, both the inner panel 5 and the striker reinforcement 8 are subjected to a predetermined fixing operation such as spot welding at a predetermined location.

  In this way, when the striker reinforcement 8 is made into a structure in which the beat part 84 is continuous with the rear end side vertical wall part 82 and the front end side vertical wall part 83, when the striker reinforcement 8 is pressed, The press working position of the beat seating surface 85 of the beat portion 84 is stable and error is hardly generated, and the processing accuracy of the striker reinforcement 8 is improved.

  Therefore, as is apparent from the stress distribution diagram around the beat portion 84 shown in FIG. 4, even when the striker base 7 is placed on the striker reinforcement 8 and spot welding is performed, the striker base 7 is not beaten. Therefore, stress can be prevented from being concentrated around the spot weld after spot welding. Note that the stress distribution diagram shown in FIG. 4 indicates that the stress is concentrated as the stripes are concentrated and darker, and when compared with FIG. 11 which is the stress distribution diagram shown in the conventional example, The difference is clear.

  The present invention can be used for a hood that opens and closes an engine room and a trunk room of a passenger car.

DESCRIPTION OF SYMBOLS 1 Car 2 Engine room 3 Engine hood 4 Outer panel 5 Inner panel 6 Striker 7 Striker base 8 Striker reinforcement 81 Base part 82 Rear end side vertical wall part 83 Front end side vertical wall part 84 Beat part 85 Beat seat surface 86 Rigid wall Part 87 Through hole

Claims (2)

An outer panel that is an outer plate of an engine hood that rotates about one end side as a rotation axis and covers the engine room so that it can be opened and closed;
An inner panel that is an inner plate of the engine hood and is fixed to a lower side of the outer panel;
A convex beat which is arranged on the outer panel side of the inner panel and on the side opposite to the rotation axis side of the inner panel and is fixed to the inner panel, and is continuous in the front-rear direction so that the upper surface becomes a beat seat surface. A striker reinforcement that provides a plurality of parts at appropriate intervals; and
A striker base fixed to the beat bearing surface of the striker reinforcement;
A vehicle hood structure comprising: a striker fixed to the striker base and projecting downward from the engine hood. An inner panel fixed to the lower side of the outer panel;
The striker reinforcement includes a vertical wall portion erected on the outer panel side on the side opposite to the rotation shaft end side and / or the rotation shaft end side of the inner panel, and the beat portion of the inner panel The hood structure for a vehicle according to claim 1, wherein the vehicle hood structure is provided up to a vertical wall portion on the side opposite to the rotating shaft end side and / or on the rotating shaft end side.

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