JP6172062B2 - Vehicle mounting structure - Google Patents

Description

  The present invention relates to a vehicle mount structure.

  In a vehicle mounting structure in which a cabin side mounting bracket disposed at a lower portion of a dash panel is fastened with bolts and nuts to a frame side mounting bracket disposed at a predetermined position of the vehicle frame, the cabin side mounting bracket A mount retainer to which the nut is fixed is disposed on the upper side surface. Then, the cabin is mounted on the frame by tightening the bolt to the nut of the mount retainer through the frame side mounting bracket and the cabin side mounting bracket. Moreover, as a vehicle body front part structure which absorbs the energy at the time of a front collision, it is disclosed by patent document 1, for example.

JP 2002-356179 A

  By the way, in the vehicle mounting structure in which the cabin side mounting bracket disposed at the lower part of the dash panel is fastened to the frame side mounting bracket by bolts and nuts, the front wheel is located at the lower part of the dash panel at the time of the vehicle front collision. The dash panel and the floor panel connected to the lower end of the dash panel may be greatly deformed rearward of the vehicle due to collision. In order to suppress such deformation, the reinforcing panel (rocker extension panel or tunnel extension panel) extending in the front-rear direction is disposed on the cabin-side mount bracket to increase the strength in the front-rear direction of the mount part and its vicinity. Can be considered. However, when a reinforcing panel extending in the front-rear direction is provided for the cabin-side mounting bracket, there is a difference in rigidity between the portion where the reinforcing panel is provided (fixed) and the portion without the reinforcing panel. Will occur. That is, the portion where the reinforcing panel is disposed (adhered) has higher rigidity than the portion without the reinforcing panel, and stress concentrates on the portion without the reinforcing panel, which may cause a decrease in durability.

  In view of the above problems, an object of the present invention is to provide a vehicle mount structure capable of efficiently increasing the strength of the vehicle mount and the vicinity thereof.

  In order to solve the above-mentioned problems, a vehicle mounting structure according to a first aspect of the present invention is configured such that a cabin side disposed at a lower portion of a dash panel with respect to a frame side mounting bracket disposed at a predetermined position of a frame. A mounting structure for a vehicle in which a mounting bracket is fastened with bolts and nuts, and a mount retainer to which the nut is fixed is disposed on an upper side surface of the cabin side mounting bracket, and the nut is mounted on the mount retainer. A laterally extending portion extending from the nut arrangement region portion to be fixed to the vicinity of the vehicle inner end portion of the cabin side mount bracket is integrally formed, and a lower side surface of the cabin side mount bracket is provided with a mount retainer. Brackets that are overlapped with the cabin-side mounting bracket between the laterally extending portions A tunnel reinforcement panel that integrally has a joint part and a tunnel joint part that extends from the bracket joint part to the tunnel part of the dash panel and is joined thereto, and the tunnel reinforcement panel includes Further, an extended reinforcing portion extending rearward from the rear end portion of the tunnel junction portion is provided.

  According to the first aspect of the present invention, the difference in rigidity generated in the cabin-side mount bracket can be kept small by the laterally extending portion that extends from the nut arrangement region of the mount retainer to the vicinity of the cabin inner end of the cabin-side mount bracket. it can. Then, the bracket joint portion of the tunnel reinforcement panel is joined to the laterally extending portion of the mount retainer with the cabin side mount bracket sandwiched therebetween. Furthermore, by providing an extended reinforcing portion extending rearward from the rear end portion of the tunnel joint portion of the tunnel reinforcement panel, the strength of the vehicle mount portion and its vicinity can be efficiently increased. As a result, it is possible to satisfactorily improve the durability performance of the mount portion and the front collision performance (for example, ODB front collision performance) of the vehicle.

  A vehicle mounting structure according to a second aspect of the present invention is the vehicle mounting structure of the first aspect of the present invention, wherein the cabin is mounted on the lower side surface of the cabin side mounting bracket with respect to the nut arrangement region portion of the mount retainer. A rocker extension panel integrally including a bracket joint portion that is overlapped with the side mount bracket interposed therebetween and an extension reinforcing portion that extends rearward from the bracket joint portion is provided.

  According to the second invention, the rocker extension panel disposed on the lower side surface of the cabin-side mount bracket can further increase the strength of the mount portion of the vehicle and the vicinity thereof. Greatly effective in improving the impact performance (for example, ODB pre-impact performance).

  A vehicle mounting structure according to a third aspect of the invention is the vehicle mounting structure of the first or second aspect of the invention, wherein the cabin-side mounting bracket has a plate thickness dimension of the dash panel, the tunnel reinforcement panel, It is characterized by being set smaller than the plate thickness dimension of the mount retainer.

  According to the third invention, when the plurality of panels of the dash panel, the tunnel reinforcement panel, and the mount retainer are joined to the cabin side mounting bracket by spot welding, the plate thickness of the cabin side mounting bracket By setting the dimensions small, a plurality of panels can be favorably joined to the cabin side mounting bracket by spot welding without causing poor welding. In addition, if the plate thickness dimension of the cabin side mounting bracket is set small, the rigidity of the cabin side mounting bracket is reduced. The rigidity of the cabin side mounting bracket is reduced from the nut installation area of the mount retainer to the cabin. It can suppress by the lateral direction extension part extended to the vehicle inside edge part vicinity of the side mount bracket.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a skeleton portion of a vehicle in which a vehicle mount structure according to Embodiment 1 of the present invention is employed, from the front lower side. It is a perspective view which expands and shows the frame part of vehicles from the front lower part. It is a side view which shows a side part of a vehicle with a part broken away. It is a side cross section which expands and shows a principal part. It is sectional drawing which follows the VV line of FIG. It is a perspective view which shows the arrangement | positioning state of the cabin side mounting bracket, rocker extension panel, tunnel reinforcement panel, and tunnel extension panel which are arrange | positioned at the lower part of a cabin dash panel from back lower part. It is a disassembled perspective view which shows the state which isolate | separated the cabin side mounting bracket, the rocker extension panel, the tunnel reinforcement panel, and the tunnel extension panel.

  A mode for carrying out the present invention will be described in accordance with an embodiment.

  A first embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the frame 10 includes left and right side frame portions 11 that are spaced apart from each other in the vehicle width direction, and a plurality of front and rear cross members 12 that connect the both side frame portions 11 at a plurality of front and rear portions. The frame is constructed in one piece. Mounts are disposed at a plurality of front and rear portions of both side frame portions 11, and the cabin 20 is supported by these mounts.

  The vehicle mount structure 1 according to the first embodiment is configured in a portion corresponding to the lower portion of the dash panel 25 of the cabin 20, as shown in FIGS. That is, a frame-side mount bracket 13 projecting in the vehicle width direction is disposed at a portion of the side frame portion 11 corresponding to the lower portion of the dash panel 25 of the cabin 20. As shown in FIGS. 4 and 5, a bolt hole 15 through which a mounting fastening bolt 16 is inserted from below is provided in the fastening portion 14 formed at the projecting end portion of the frame side mounting bracket 13. Has been.

  As shown in FIGS. 4 to 7, with respect to the frame side mounting bracket 13, a cabin side mounting bracket 30 is disposed on a downwardly inclined bracket mounting portion 27 formed at the lower portion of the dash panel 25. As shown in FIG. 7, the cabin side mounting bracket 30 includes a bottom wall portion 31, a front wall portion 32, left and right side wall portions 33 that block both ends of the bottom wall portion 31 and the front wall portion 32, and each of these wall portions. And a joining flange portion 34 that protrudes from the tip of the base plate and forms a square ring shape. Further, a bolt hole 35 is provided in a portion closer to the vehicle side of the bottom wall portion 31 of the cabin side mounting bracket 30. The cabin side mounting bracket 30 is fixed to the lower bracket mounting portion 27 of the dash panel 25 by spot welding at the joint flange portion 34.

  As shown in FIGS. 4 to 7, a mount retainer 40 is disposed on the upper side surface (inner side surface) of the cabin side mounting bracket 30. The mount retainer 40 is fixed by spot welding along the bottom wall portion 31 of the cabin side mounting bracket 30 by spot welding, and along the front wall portion 32 of the cabin side mounting bracket 30 by spot welding. The front wall portion 42 and the bottom wall portion 41 and the side wall portion 43 that closes both ends of the front wall portion 42 are integrally provided. A bolt hole 45 is provided in the bottom wall portion 41 at a position corresponding to the bolt hole 35 of the cabin side mounting bracket 30, and a nut 44 is welded to the upper surface of the bottom wall portion 41 so as to face the bolt hole 45. It is fixed by.

  Further, as shown in FIG. 5, the mount retainer 40 has a laterally extending portion 47 that extends from the nut arrangement region portion 46 to which the nut 44 is fixed to the vicinity of the vehicle inner end portion of the cabin side mounting bracket 30. It is integrally formed.

  As shown in FIGS. 4 to 7, a tunnel reinforcement panel 51 is disposed on the lower side surface (outer surface) of the cabin side mounting bracket 30 in a state of being fixed by spot welding. The tunnel reinforcement panel 51 includes a bracket joint 52 that is overlapped with the laterally extending portion 47 of the mount retainer 40 with the cabin side mounting bracket 30 interposed therebetween, and the bracket joint 52 to the dash panel 25. It integrally has a tunnel junction 53 that extends to the tunnel portion 26 and is joined thereto.

  Further, as shown in FIGS. 6 and 7, the tunnel reinforcement panel 51 is provided with a tunnel extension panel 55 as an extension reinforcing portion extending rearward from the rear end portion of the tunnel junction portion 53. The tunnel extension panel 55 is overlapped on the lower surface of the tunnel junction 53 of the tunnel reinforcement panel 51 and fixed by spot welding, and extends rearward from the tunnel junction 56 and extends to the floor panel 21. And a floor panel joint 57 that is fixedly attached to the lower surface of the steel plate by spot welding.

  In the first embodiment, as shown in FIGS. 5 to 7, a rocker extension panel 60 extending in the front-rear direction is disposed on the lower side surface of the cabin side mounting bracket 30 near the vehicle outer side. The rocker extension panel 60 includes a bracket joint portion 61 that is overlapped with the nut arrangement region portion 46 of the cabin side mount bracket 30 with the cabin side mount bracket 30 interposed therebetween and fixed by spot welding, and the bracket joint portion. It integrally has a floor panel joint portion 62 as an extension reinforcing portion that extends rearward from the portion 61 and is fixed to the lower surface of the floor panel 21 by spot welding.

  The bracket joint 61 of the rocker extension panel 60 is provided with a bolt hole 63 at a position corresponding to the bolt hole 35 of the cabin side mounting bracket 30. 4 and 5, a mounting fastening bolt 16 is inserted from below the bolt hole 15 of the fastening portion 14 of the frame side mounting bracket 13, and a rubber bush or the like is inserted into the male screw portion of the fastening bolt 16. With the elastic body 70 inserted, the male screw portion of the fastening bolt 16 is mounted through the bolt hole 63 of the rocker extension panel 60, the bolt hole of the cabin side mounting bracket 30, and the bolt hole 45 of the mount retainer 40, respectively. By tightening the nut 44 of the retainer 40, the cabin 20 is mounted on the frame 10.

  In the first embodiment, the plate thickness dimension of the cabin side mounting bracket 30 is set to be smaller than the plate thickness dimensions of the dash panel 25, the tunnel reinforcement panel 51, and the mount retainer 40.

  The vehicle mount structure according to the first embodiment is configured as described above. Accordingly, as shown in FIG. 5, the mount retainer 40 is formed with a laterally extending portion 47 extending from the nut disposition region portion 46 to the vicinity of the cabin side mount bracket 30 and the vehicle inner end portion. Compared with the case where the extension portion 47 is not provided, a difference in rigidity generated in the cabin side mounting bracket 30 can be suppressed to be small. Then, the bracket joint portion 52 of the tunnel reinforcement panel 51 is joined to the laterally extending portion 47 of the mount retainer 40 with the cabin side mount bracket 30 being sandwiched therebetween, and the tunnel reinforcement panel 51 A tunnel junction portion 56 of the tunnel extension panel 55 as an extension reinforcement portion extending rearward from the rear end portion of the tunnel junction portion 53 is joined. As a result, the strength of the vehicle mount and its vicinity can be efficiently increased. As a result, it is possible to satisfactorily improve the durability performance of the mount portion and the front collision performance (for example, ODB front collision performance) of the vehicle.

  In the first embodiment, on the lower side surface of the cabin-side mount bracket 30, a bracket joint portion 61 that is overlapped with the nut-mounted region portion 46 of the mount retainer 40 with the cabin-side mount bracket 30 interposed therebetween. A rocker extension panel 60 having a floor panel joint 62 extending rearward from the bracket joint 61 is provided. The rocker extension panel 60 can further increase the strength of the mount portion of the vehicle and the vicinity thereof, and is highly effective in improving the durability performance of the mount portion and the front impact performance (for example, ODB front impact performance) of the vehicle. .

  In the first embodiment, the plate thickness dimension of the cabin side mounting bracket 30 is set to be smaller than the plate thickness dimensions of the dash panel 25, the tunnel reinforcement panel 51, and the mount retainer 40. As a result, a plurality of panels can be satisfactorily joined to the cabin side mount bracket 30 without causing poor welding by spot welding.

  For example, when the plate thickness dimension of the dash panel 25, the tunnel reinforcement panel 51, and the mount retainer 40 is 2 mm, the plate thickness dimension of the cabin side mounting bracket 30 is set to 1.6 mm. 4 and 5, when a plurality of panels of the cabin side mounting bracket 30, the dash panel 25, and the rocker extension panel 60 are overlapped and spot welded, the total plate of these panels is used. By suppressing the thickness dimension to 5.6 mm, spot welding can be favorably performed without poor welding. That is, when the cabin-side mount bracket 30 has a plate thickness of 2 mm, and the total plate thickness of the cabin-side mount bracket 30, the dash panel 25, and the rocker extension panel 60 is 6 mm, each of these panels. It is difficult to perform spot welding by overlaying, and it is assumed that poor welding will occur. However, as described above, by suppressing the total thickness of each panel to 5.6 mm, it is possible to achieve good welding without defects. Spot welding is possible.

  Further, when the plate thickness dimension of the cabin side mounting bracket 30 is set to be small, the rigidity of the cabin side mounting bracket 30 is lowered. It can be suppressed by a laterally extending portion 47 that extends from the region portion 46 to the vicinity of the vehicle inner end portion of the cabin side mounting bracket 30. By the way, as a result of experiment and comparison of the collision performance and durability strength performance of the vehicle adopting the mount structure of the first embodiment and the vehicle adopting the conventional mount structure, the result at the time of 64 Km / h right ODB front collision is shown. The intrusion amount at the passenger's feet was improved by 70%, and the landing point displacement at the time of 2Mt push-up input was improved by 41% in the height direction.

  In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can implement with a various form. For example, in the first embodiment, a tunnel extension panel in which the extension reinforcing portion extending rearward from the rear end portion of the tunnel joint portion 53 of the tunnel reinforcement panel 51 is made of a panel material separate from the tunnel reinforcement panel 51. However, it is also possible to integrally form an extension reinforcing portion that extends rearward from the rear end portion of the tunnel joint portion 53 of the tunnel reinforcement panel 51. In this case, the number of parts can be reduced.

DESCRIPTION OF SYMBOLS 10 Frame 13 Frame side mounting bracket 16 Fastening bolt 20 Cabin 21 Floor panel 25 Dash panel 30 Cabin side mounting bracket 40 Mount retainer 44 Nut 46 Nut arrangement | positioning area part 47 Lateral extension part 51 Tunnel reinforcement panel 55 Tunnel extension panel (Extension reinforcement part)
60 Rocker extension panel

Claims (3)

A vehicle mounting structure in which a cabin side mounting bracket disposed at a lower portion of a dash panel is fastened with bolts and nuts to a frame side mounting bracket disposed at a predetermined position of the frame,
A mount retainer to which the nut is fixed is disposed on the upper side surface of the cabin side mounting bracket,
The mount retainer is integrally formed with a laterally extending portion that extends from the nut arrangement region portion to which the nut is fixed to the vicinity of the vehicle inner end portion of the cabin side mounting bracket,
On the lower side surface of the cabin-side mount bracket, a bracket joint that is overlapped with the cabin-side mount bracket sandwiched between laterally extending portions of the mount retainer, and the dash panel tunnel from the bracket joint A tunnel reinforcement panel that integrally has a tunnel joint part that is extended to the part and joined;
2. The vehicle mount structure according to claim 1, wherein the tunnel reinforcement panel is provided with an extended reinforcing portion extending rearward from a rear end portion of the tunnel joint portion. The vehicle mounting structure according to claim 1,
On the lower side surface of the cabin-side mounting bracket, a bracket joint portion that is overlapped with the cabin-side mount bracket sandwiched between the nut mounting region portion of the mount retainer, and an extension extending rearward from the bracket joint portion A mount structure for a vehicle, wherein a rocker extension panel integrally including a reinforcing portion is disposed. The vehicle mounting structure according to claim 1 or 2,
The vehicle mounting structure, wherein a thickness of the cabin side mounting bracket is set to be smaller than a thickness of the dash panel, the tunnel reinforcement panel, and the mount retainer.

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