JP6003804B2 - Vehicle panels, back doors and vehicles - Google Patents

Description

  The present invention relates to a vehicle panel, a back door including the vehicle panel, and a vehicle, and more particularly, to a structure of a portion that fastens a part in a hole provided in the vehicle panel.

  Conventional techniques for regulating the position of the nut are disclosed in Japanese Utility Model Laid-Open No. 05-064523, Japanese Patent Application Laid-Open No. 2002-122122, and Japanese Patent Application Laid-Open No. 2002-310125.

  In the prior art for regulating the position of the nut, a position regulating bead is provided on the washer. These washers are provided with corners that bite a soft and thick material such as wood on the opposite side of the surface that contacts the nut. By using a washer with such a structure, it is possible to prevent the nut from slipping without attaching a tool for fixing the nut, and it is possible to perform the fastening operation only with a tool such as a spanner for rotating the bolt head. it can.

Japanese Utility Model Publication No. 05-066453 JP 2002-122122 A JP 2002-310125 A

  Fastening members such as nuts and bolts are often used to fasten parts to vehicle panels. However, since the vehicle panel is a sheet metal with a thin plate thickness, it is used for the above-described conventional washer, that is, wood, etc., and it is the panel that uses a washer that bites into a thick base material. Risk of damage.

  Also, when fastening heavy parts to the panel, if the corners of the nuts and washers are in a bad position, stress due to vibrations, etc. may be concentrated on the corners after fastening and the sheet metal may be damaged. In addition, there is a problem that the thickness of the sheet metal must be increased. In the above prior art, it has not been considered to restrict the positions of the corners of the nut and the washer with respect to the plate to be fastened.

  An object of the present invention is to provide a vehicle panel in which a position of a fastening member such as a nut having a corner on a fastening surface with respect to a plate body is fixed and stress concentration hardly occurs, a back door including the vehicle panel, and a vehicle.

  In summary, the present invention provides a vehicle panel having a plate member provided with a hole and a plate member arranged so that the screw hole coincides with the hole, and having at least one corner on an outer surface of the surface in contact with the plate member. The nut for fixing the weight for the dynamic damper, and the position of the corner in the rotation direction of the nut about the central axis of the screw hole provided on the surface where the nut is arranged around the hole in the plate And a position restricting section for restricting the position.

  Preferably, the nut is welded to the plate material, and the outer shape of the weld surface welded to the plate material of the nut is a quadrangle.

  Preferably, due to the restriction by the position restricting portion, the corner of the outer shape of the nut is a surface that is perpendicular to the arrangement surface of the plate material on which the nut is arranged and includes a line that connects the center of the hole of the plate material and the center of gravity of the weight It is in a position avoiding.

Preferably, the position restricting portion is formed by plastic deformation of a part of the plate material.
Preferably, a support member for supporting the weight and a bolt for fastening the support member to the nut are further provided.

More preferably, the plate material is thinner than the support material.
In another aspect, the present invention provides a back door including any one of the above-described vehicle panels, an interior panel attached to a vehicle compartment side of the vehicle panel, and an exterior panel attached to the vehicle exterior of the vehicle panel. is there.

  In another aspect, the present invention is a vehicle including any one of the vehicle panels described above.

  According to the present invention, the corner position of a fastening member such as a nut is restricted to a position where stress concentration is unlikely to occur, so that the thickness of the vehicle panel can be reduced and the cost of the vehicle can be reduced. it can.

It is a figure for demonstrating the back door panel of a vehicle. It is longitudinal direction sectional drawing of the center part of a back door panel. It is the perspective view which looked at the vehicle panel which removed the exterior panel and the interior panel from the vehicle compartment outer side. It is the perspective view which looked at the vehicle panel which removed the exterior panel and the interior panel from the vehicle interior side. It is a perspective view of the weld nut welded to the vehicle panel. It is an enlarged view of the weld nut welded part after being welded to the vehicle panel. It is a top view of the weld nut welded part after being welded to the vehicle panel. It is the figure which showed the VIII-VIII cross section in the state in which the bracket and the volt | bolt were assembled | attached to the weld nut of FIG. It is the figure which showed the comparative example by which the position of the corner of a weld nut was changed. It is a figure for demonstrating the dimension of the top view of a weld nut. It is a figure for demonstrating the magnitude relationship of the dimension of the side view of the hole of a board | plate material, a control protrusion, and a weld nut. It is the figure which showed the 1st modification of the position control part provided in a board | plate material. It is the figure which showed the 2nd modification of the position control part provided in a board | plate material. It is the figure which showed the 3rd modification of the position control part provided in a board | plate material. It is the figure which showed the 4th modification of the position control part provided in a board | plate material. It is the figure which showed the modification of the bracket to which the weight for dynamic dampers is attached.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding elements are denoted by the same reference numerals, and description thereof will not be repeated.

  FIG. 1 is a diagram for explaining a back door panel of a vehicle. Referring to FIG. 1, vehicle 1 includes a back door panel 10 at the rear of the vehicle. Although the back door panel 10 shown in FIG. 1 opens in the upward direction of the vehicle, the back door panel 10 may open in the left-right direction. The back door panel 10 constitutes a part of a wall at the rear part of the passenger compartment.

  When the vehicle travels, vibration is generated, but at a specific frequency, the vibration of the wall of the passenger compartment increases, and a muffled sound is generated in the passenger compartment. In order to suppress the vibration that causes the booming noise, a dynamic damper may be attached to the wall of the passenger compartment.

  Specifically, if the weight constituting the dynamic damper is attached to the back door in order to shift the frequency band of the sound that can be heard by the mass damper with the mass damper, the quietness in the vehicle interior is improved.

  FIG. 2 is a longitudinal sectional view of a central portion of the back door panel. FIG. 3 is a perspective view of the vehicle panel with the exterior panel and the interior panel removed, as viewed from the outside of the passenger compartment. FIG. 4 is a perspective view of the vehicle panel with the exterior panel and the interior panel removed as viewed from the vehicle interior side.

  2 to 4, the back door panel 10 includes a panel 14 that is a metal sheet metal, and includes an exterior panel 12, an interior panel (not shown), and a window glass. An opening is provided at the center of the panel 14 to accommodate the weight 30 for the dynamic damper. A dynamic damper weight 30 is attached to the panel 14 by a bracket 16.

  A weight 30 is attached to the bracket 16 with two bolts. Nuts 18 are welded at three locations around the opening for accommodating the weight 30 of the panel 14, and the bracket 16 is fastened to the panel 14 by these nuts 18 and bolts (not shown).

  FIG. 5 is a perspective view of a weld nut welded to the vehicle panel. FIG. 6 is an enlarged view of a weld nut welded portion after being welded to the vehicle panel.

  The nut 18 has a quadrangular outer shape on the contact surface with the panel 14 when viewed from above. The nut 18 and the panel 14 are welded by a projection welding method. The nut 18 is provided with protrusions at the four corners of the contact surface before welding. The nut 18 disposed on the panel 14 is pressed against the panel 14 with the electrode pressed against the upper surface. In this state, when current flows from the electrode to the panel 14 via the nut 18, current concentrates on the protrusions at the four corners, the protrusions melt, and the nut 18 is welded to the panel 14.

  Such a nut 18 whose outer shape of the contact surface to the panel is a quadrangle has a low manufacturing cost and is relatively frequently used. And there is also an existing equipment for automatic conveyance for automatically welding nuts of such shape, and changing the shape of the nut requires a new change to the equipment for automatic conveyance, so the shape of the nut is changed. That is not preferable.

  As shown in FIG. 6, position restricting portions 22 and 24 for restricting the position of the nut at the time of welding are provided around the nut 18. The position restricting portions 22 and 24 may be formed by any method as long as the protrusions protrude from the mounting surface of the nut 18. Preferably, when the press die is made so that the position restricting portions 22 and 24 are formed at the same time when the panel 14 is molded by press working, it can be realized at low cost.

  FIG. 7 is a top view of the weld nut welded portion after being welded to the vehicle panel. FIG. 8 is a view showing a section VIII-VIII in a state where a bracket and a bolt are assembled to the weld nut of FIG. The section VIII-VIII is a plane that is perpendicular to the arrangement plane of the panel 14 on which the nut 18 is arranged and includes a line that connects the center of the hole of the plate material and the center of gravity of the weight 30.

  With reference to FIGS. 7 and 8, position restricting portions 22 and 24 for restricting the position of the nut 18 are provided on both sides of the nut 18. The panel 14 and the bracket 16 are fastened by the nut 18 and the bolt 19. The bracket 16 is thicker than the panel 14.

  The nut 18 is welded to the panel 14, and a washer 20 is disposed between the bolt 19 and the bracket 16. Note that the nut 18 is not necessarily welded to the panel 14.

  A weight 30 shown in FIGS. 2 to 4 is attached to the bracket 16. The weight of the weight 30 is several kg to several tens kg. When an object having such a weight is attached to the panel 14, the weight 30 hangs on the panel 14 in the direction indicated by the arrow D1. When the vehicle vibrates, bending stress is applied to the panel 14 in the direction indicated by the arrow F shown by the broken line in FIG. Since the outer shape of the contact surface of the panel 14 of the nut 18 has a corner, if the orientation of the nut 18 is bad, stress may concentrate on the corner. There is a relationship of σ = F / A among the stress σ, the load F, and the area A of the surface on which the load is applied.

  FIG. 9 is a view showing a comparative example in which the position of the corner of the weld nut is changed. When comparing the broken line portions where stress is concentrated shown in FIGS. 7 and 9, the areas of the portions S3 and S4 surrounded by the broken lines in FIG. 9 are smaller than the portions S1 and S2 surrounded by the broken lines in FIG. . In the above equation, even if the load F is the same, the area A is small, so the stress σ generated in the portions S3 and S4 is large. Therefore, the nut 18A arranged in the direction of FIG. 9 generates a larger stress on the panel 14 than the nut 18 arranged in the direction of FIG.

  For example, it is also possible to automatically weld the nut without matching the position of the nut but only to the corner of the nut. For example, the head of a welding electrode for general blow welding is circular and flat, and does not regulate the direction of the nut. However, when such a method is adopted, it is not known what the position of the corner in the rotational direction of the nut will be.

  In order to allow attachment of nuts oriented in the direction shown in FIG. 9, it is necessary to increase the thickness of the panel 14 in order to withstand a large stress. In the present embodiment, the position restricting portions 22 and 24 are formed on the panel 14 to prevent the direction of the nut 18 from becoming like the nut 18A of FIG. In other words, the positioning is performed so that the corner portion of the nut 18 comes to a position avoiding the section VIII-VIII in FIG. Therefore, since stress concentration can be avoided, the thickness of the panel 14 can be reduced. For this reason, the weight and cost of the vehicle can be reduced.

Next, the positional relationship between the position restricting portion and the nut will be described in a little more detail.
FIG. 10 is a view for explaining the dimensions of the weld nut in a top view. FIG. 11 is a diagram for explaining the size relationship between the hole of the plate member and the restricting protrusion and the dimension of the weld nut in a side view.

  Referring to FIGS. 10 and 11, the length of one side of the rectangular bottom surface of nut 18 is indicated by W1. Further, the length of the diagonal line of the bottom surface of the quadrangle of the nut 18 is indicated by W2. On the other hand, the inner dimension of the portion where the position restricting portions 22 and 24 rise from the panel 14 is indicated by W3. When position restricting portions are formed on both sides of the hole, the position restricting portions 22 and 24 are formed on the panel 14 so as to satisfy the relationship of W1 <W3 <W2.

  Note that the position restricting portions are not necessarily formed on both sides of the nut. In this case, if the dimension from the center O of the hole of the panel 14 and the screw hole of the nut 18 to the rising part of the position restricting portion 22 or 24 is (1/2) W3, the dimensions of the one side and the diagonal line of the nut are respectively If 1/2, (1/2) W1 <(1/2) W3 <(1/2) W2 may be satisfied.

12-15 is the figure which showed the modification of the position control part provided in a board | plate material.
FIG. 12 shows an example in which the position restricting portions 22, 24, 26, and 28 are provided on the four sides of the nut 18. FIG. 13 shows an example in which the position restricting portions 26 and 28 are provided on both sides of the nut 18 at positions different from those in FIG. FIG. 14 shows an example in which the position restricting portions 22, 26, and 28 are provided on three sides of the nut 18. FIG. 15 shows an example in which position restricting portions 26A and 28A having different shapes from those in FIGS. 7 and 13 are provided on both sides of the nut 18. All of these are provided with a position restricting portion so as to protrude toward the surface on which the nut 18 is disposed. These position restricting portions can be simultaneously formed by pressing when a hole whose center coincides with the screw hole of the nut 18 is formed in the panel 14.

  FIG. 16 is a view showing a modification of the bracket to which the dynamic damper weight 30B is attached. 3 and 4 show an example in which the bracket 16 is fastened to the panel 14 at three points by bolts and nuts. However, as shown in FIG. 16, the present invention can be applied by providing the position restricting portions 22B and 24B for restricting the position of the nut 18B even when fastened at two points, and fastened at four or more points. Even in this case, the present invention is applicable.

  Finally, this embodiment will be summarized with reference to the drawings again. As shown in FIG. 4, the vehicle panel according to the present embodiment includes a panel 14 that is a plate material provided with holes, and a surface that is disposed on the panel 14 so that the screw holes coincide with the holes and is in contact with the panel 14. A nut 18 for fixing the weight 30 for the dynamic damper having at least one corner in the outer shape, and projecting on a surface where the nut 18 is arranged around the hole of the panel 14, and the center of the screw hole Position restricting portions 22 and 24 for restricting the position of the corner of the nut in the rotational direction about the shaft are provided.

  Preferably, the nut 18 is welded to the panel 14 and, as shown in FIG. 10, the outer shape of the welded surface welded to the plate of the nut 18 is a quadrangle.

  Preferably, as shown in FIG. 7, due to the restriction by the position restriction portions 22 and 24, the corner of the outer shape of the nut 18 is a surface perpendicular to the arrangement surface of the panel 14 on which the nut 18 is arranged, and It is in a position that avoids a plane (cross section shown in FIG. 8) including a line connecting the center of the hole for attaching the nut and the center of gravity of the weight 30.

  Preferably, as shown in FIG. 11, the position restricting portions 22 and 24 are formed by plastically deforming a part of the panel 14 by, for example, pressing.

  Preferably, the vehicle panel further includes a weight 30, a bracket 16 that is a support material that supports the weight 30, and a bolt 19 that fastens the support material to the nut 18.

  More preferably, as shown in FIG. 8, the panel 14 is thinner than the bracket 16 which is a support material.

  In this embodiment, an example in which a protrusion as a position restricting portion is formed by pressing on the panel is shown. Instead, the protrusion is bonded to the panel as a position restricting portion or guided by a method different from the panel press. A bead may be formed.

  In this embodiment, the nut 18 is welded to the panel. However, even if the nut 18 is not welded, the same effect can be obtained by positioning the corners of the nut by the same method.

  Furthermore, in the present embodiment, an example in which a weight for a dynamic damper is attached to the back door panel has been shown. However, the present invention is similarly applied when attaching a weight to another wall (for example, a roof of a driver's seat). Can also be applied.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  DESCRIPTION OF SYMBOLS 1 Vehicle, 10 Back door panel, 12 Exterior panel, 14 Panel, 16 Bracket, 18, 18A Nut, 19 bolt, 20 Washer, 22, 24, 26, 28, 26A, 28A, 22B, 24B Position control part, 30, 30B weight.

Claims (7)

A plate with holes,
A nut that is disposed on the plate material such that the screw hole coincides with the hole, has at least one corner on the outer shape of the surface in contact with the plate material, and fixes a weight for a dynamic damper;
A position restricting portion provided around the hole of the plate material so as to protrude on a surface on which the nut is disposed and restricting the position of the corner in the rotation direction of the nut around the central axis of the screw hole; Prepared ,
Due to the restriction by the position restricting portion, the corner of the outer shape of the nut is a surface perpendicular to the surface of the plate member on which the nut is disposed, and connects the center of the hole of the plate member and the center of gravity of the weight. A vehicle panel in a position that avoids surfaces that contain lines . The nut is welded to the plate;
The vehicle panel according to claim 1, wherein an outer shape of a welding surface welded to the plate member of the nut is a quadrangle.   The vehicle panel according to claim 1, wherein the position restricting portion is formed by plastic deformation of a part of the plate material. A support material for supporting the weight;
The vehicle panel according to claim 1, further comprising a bolt that fastens the support member to the nut.   The vehicle panel according to claim 4, wherein the plate material is thinner than the support material. A vehicle panel according to claim 1;
An interior panel attached to a vehicle compartment side of the vehicle panel;
A back door comprising an exterior panel attached to the vehicle exterior side of the vehicle panel.   A vehicle comprising the vehicle panel according to claim 1.

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