Vehicle fastening structure

Abstract

The present invention obtains a vehicle fastening structure capable of satisfactorily maintaining a fastened state in a vehicle fastening structure in which mechanical fastening by a bolt and joining by an adhesive material are combined. The vehicle fastening structure is provided with: a bolt hole (36) which is opened in an opposing surface (20A) of a member (20) to be fastened, the opposing surface (20A) facing the member to be fastened, and into which a bolt can be screwed; a step section (38) for a bolt, which protrudes from the facing surface (20A) toward the member to be fastened, surrounds the hole edge of the bolt hole (36), and is in contact with the member to be fastened; and a step section (40) for an adhesive material, which protrudes from the facing surface (20A) toward the member to be fastened and in which the adhesive material is disposed, the step section (40) for the adhesive material being disposed so as to be divided into a plurality of sections at the periphery of the step section (38) for the bolt with a gap therebetween from the step section (38) for the bolt.

Description

Technical Field

[0001] This invention relates to a vehicle fastening structure. Background Technology

[0002] Patent Document 1 discloses a fastening structure for the cylinder block and oil pan in a vehicle engine. Specifically, in a structure that uses bolts and nuts to secure the oil pan and cylinder block, an adhesive coating surface coated with a sealing adhesive is provided on the flange of the cylinder block. Furthermore, in Patent Document 1, a groove for a release agent to pass through is formed between the adhesive coating surface and the fastening hole.

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2004-316574 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in the structure of the aforementioned Patent Document 1, since the adhesive coating surface is continuously arranged along the flange and spans the circumference, it is possible that the adhesive will diffuse into the fastening hole during bonding, thus failing to maintain the tightness of the bolt fastening.

[0008] The object of the present invention is to obtain a vehicle fastening structure that can maintain a fastened state well, in a vehicle fastening structure that combines bolt-based mechanical fastening and adhesive-based bonding.

[0009] Methods for solving problems

[0010] The vehicle fastening structure involved in technical solution 1 includes: a bolt hole, which is opened on the opposing surface of the fastened member and is capable of being screwed on; a bolt elevation difference portion, which protrudes from the opposing surface toward the fastened member and surrounds the edge of the bolt hole, and is in contact with the fastened member; and an adhesive material elevation difference portion, which protrudes from the opposing surface and is provided with adhesive material, the adhesive material elevation difference portion being arranged in a manner that is spaced apart from the bolt elevation difference portion around it and divided into multiple portions.

[0011] In the vehicle fastening structure of technical solution 1, the bolt hole is opened on the opposing surface of the fastening member, opposite to the fastened member, allowing the bolt to engage with the bolt hole. Furthermore, a bolt elevation difference portion protrudes from the opposing surface of the fastening member toward the fastened member, surrounding the edge of the bolt hole and contacting the fastened member. Further, an adhesive material elevation difference portion protrudes from the opposing surface of the fastening member toward the fastened member, and adhesive material is disposed on this portion. In this manner, since both the bolt elevation difference portion and the adhesive material elevation difference portion protrude from the opposing surface, the diffusion of adhesive material around the bolt hole can be suppressed.

[0012] Furthermore, the adhesive material level difference portions are arranged in a manner that separates and divides the bolt level difference portions around them. This allows the adhesive material to enter the gaps between adjacent adhesive material level difference portions, preventing it from spreading to unintended areas and thus effectively maintaining the tightness of the fastened components.

[0013] The vehicle fastening structure involved in technical solution 2 is as follows: In technical solution 1, the opposing surface is configured to include a first opposing surface opposing the fastened member in the vehicle width direction and a second opposing surface opposing the fastened member in the vehicle vertical direction.

[0014] In the vehicle fastening structure involved in technical solution 2, since the fastening object component is fixed to the fastened part through the first opposing surface and the second opposing surface, the fastening object component can be installed in the vehicle width direction and the vehicle vertical direction.

[0015] The vehicle fastening structure involved in technical solution 3 is as follows: In technical solution 2, the first opposing surface is provided with the height difference portion for the bolt and the height difference portion for the adhesive material, and the second opposing surface is provided with at least the height difference portion for the adhesive material.

[0016] In the vehicle fastening structure of technical solution 3, since the first opposing surface of the fastening target member, which faces the fastened member in the vehicle width direction, is provided with a bolt height difference portion and an adhesive material height difference portion, the first opposing surface can be fixed by bolts and adhesive material. Furthermore, since the second opposing surface of the fastening target member, which faces the fastened member in the vehicle vertical direction, is provided with at least an adhesive material height difference portion, the second opposing surface can be fixed by at least adhesive material.

[0017] The vehicle fastening structure involved in technical solution 4 is as follows: In technical solution 1, multiple bolt holes are formed along the front-rear direction of the vehicle, and adjacent bolt holes are formed in staggered positions in a manner that is offset from each other in the vertical direction of the vehicle.

[0018] In the vehicle fastening structure involved in technical solution 4, since the adjacent bolt holes are formed in staggered positions with offset from each other in the vertical direction of the vehicle, compared with the case where the bolt holes are arranged in a straight line, the fastening state can be well maintained relative to the external forces input in both the vertical and longitudinal directions of the vehicle.

[0019] The vehicle fastening structure involved in technical solution 5 is, in any one of technical solutions 1 to 4, the fastening object component is a vehicle frame component formed by die casting and constituting the vehicle frame.

[0020] In the vehicle fastening structure described in technical solution 5, since the fastening target component is a vehicle frame component formed by die casting, it is difficult to join it by welding or the like. Even so, the vehicle frame component can be firmly fixed to the fastened component by bolts and adhesive materials.

[0021] Invention Effects

[0022] As described above, the vehicle fastening structure according to the present invention can maintain a good fastening state in a vehicle fastening structure that combines bolt-based mechanical fastening and adhesive-based bonding. Attached Figure Description

[0023] Figure 1 This is a perspective view of the front of a vehicle that employs the vehicle fastening structure described in the embodiment.

[0024] Figure 2 This is a perspective view showing the vehicle fastening structure involved in the embodiment.

[0025] Figure 3 This is a perspective view showing the fastening object component in the embodiment. Detailed Implementation

[0026] The vehicle fastening structure involved in the implementation method will be described with reference to the accompanying drawings.

[0027] Figure 1 This is a perspective view of the front of a vehicle that employs the vehicle fastening structure described in the embodiment. Additionally, Figure 1The arrow markings FR, UP, and RH respectively indicate the forward, upward, and rightward directions of the vehicle 10 with the vehicle fastening structure applied. In the following description, unless otherwise specified, the directions front-back, up-down, and left-right are used to represent front-back in the front-back direction, up-down in the up-down direction, and left-right in the left-right direction (width direction).

[0028] like Figure 1 As shown, the vehicle 10 using the vehicle fastening structure of this embodiment has a pair of lower side beams 12 on the left and right sides. The lower side beams 12 are provided on both sides in the vehicle width direction and are vehicle frame members extending in the vehicle front-rear direction, respectively. In addition, the lower side beams 12 correspond to the fastened members of the present invention.

[0029] The left and right lower side beams 12 are connected together in the vehicle width direction by transverse members 14 and 16. The transverse member 14 is a long strip-shaped member with a closed cross-section extending in the vehicle width direction, with one end fixed to the right lower side beam 12 and the other end fixed to the left lower side beam 12. Furthermore, a vehicle seat (not shown) is mounted on the transverse member 14.

[0030] The transverse member 16 is a long strip-shaped member that is positioned behind the transverse member 14, has a closed cross-section, and extends in the vehicle width direction. Furthermore, one end of the transverse member 16 is fixed to the lower side beam 12 on the right side, and the other end is fixed to the lower side beam 12 on the left side.

[0031] A front module 18, serving as a fastening component, is connected to the front end of the lower side beam 12. The front module 18 is a vehicle frame component formed by die casting and constitutes the vehicle skeleton, forming the frame of the front part of the vehicle. The front module 18 is configured to include a lower pillar portion 20, a front wall portion 22 of the passenger compartment, a front longitudinal beam portion 24, and a suspension tower portion 26.

[0032] The lower support column 20 is positioned at the rear of the front module 18 and is arranged as a pair, extending vertically in the vehicle direction. Furthermore, a lower side beam 12, serving as a connecting member, is installed at the lower support column 20. Further, an upper support column (not shown) is installed at the upper end of the lower support column 20.

[0033] The front wall section 22 of the passenger compartment connects the lower parts 20 of the left and right pillars in the vehicle width direction and divides the passenger compartment and the passenger compartment. A pair of front longitudinal beams 24 are provided on the left and right sides, each extending from the front wall section 22 towards the front of the vehicle. Furthermore, a bumper reinforcement (not shown) is installed at the front end of the front longitudinal beams 24.

[0034] The suspension tower 26 is formed as a generally box-shaped structure with an open lower side of the vehicle and a circular hole (not shown) formed on its upper surface, and is configured to support a shock absorber (not shown).

[0035] Figure 2 The diagram shows a perspective view of the vehicle fastening structure according to the embodiment, and illustrates the fastening portions of the lower support 20 and the lower side beam 12. Figure 2 As shown, the lower beam 12 is configured to include an upper surface 12A facing above the vehicle, a lower surface 12C facing below the vehicle, and a side surface 12B connecting the upper surface 12A and the lower surface 12C.

[0036] On the side surface 12B, inside the vehicle width direction at the front end of the lower side beam 12, a plurality of through holes 12D are formed. In this embodiment, four through holes 12D are formed as an example. The four through holes 12D are circular holes that penetrate the side surface 12B in the plate thickness direction, and are formed alternately vertically along the vehicle front-rear direction. Bolts 100 are inserted into these through holes 12D.

[0037] Since the lower part 20 of the support column is shaped to connect with the upper surface 12A of the lower side beam 12 and the side surface 12B on the outer side in the vehicle width direction, the lower end of the lower part 20 of the support column is formed into an approximately L-shape when viewed from the front and rear directions of the vehicle.

[0038] Figure 3 This is a perspective view of the lower part 20 of the support column, which is the fastening target component in the embodiment. Figure 3 As shown, the lower part 20 of the support column has a first opposing surface 20A that faces the side surface 12B of the lower side beam 12 in the vehicle width direction, and a second opposing surface 20B that faces the upper surface 12A of the lower side beam in the vehicle vertical direction. In addition, a plurality of ribs 21 extend from the second opposing surface 20B upward and forward of the vehicle on the lower part 20 of the support column.

[0039] Here, on the first opposing surface 20A of the lower part 20 of the support column, a plurality of bolt holes 36 are provided. In this embodiment, four bolt holes 36 are provided as an example. The bolt holes 36 are respectively formed at positions opposite to the through holes 12D formed on the lower side beam 12. Specifically, the bolt holes 36 are formed along the longitudinal direction of the vehicle, and adjacent bolt holes 36 are formed in staggered positions in a manner offset from each other in the vertical direction of the vehicle. Furthermore, these bolt holes 36 have threaded grooves for bolts 100 to engage.

[0040] Here, the lower part 20 of the support column has a protrusion 32 on the outer side in the vehicle width direction compared to the first opposing surface 20A, and a cylindrical connecting part 34 is formed between the protrusion 32 and the first opposing surface 20A. The cylindrical connecting part 34 connects the protrusion 32 and the first opposing surface 20A at the position of the bolt hole 36, and a threaded groove is formed on the inner wall of the cylindrical connecting part 34. That is, the protrusion 32 is provided for bolting the lower part 20 of the support column to the lower side beam 12.

[0041] On the first opposing surface 20A, a bolt height difference portion 38 and an adhesive material height difference portion 40 are provided. The bolt height difference portion 38 is an annular portion that protrudes from the first opposing surface 20A in the vehicle width direction (towards the lower side beam 12), surrounds the edge of the bolt hole 36, and connects to the side surface 12B of the lower side beam 12. In this embodiment, bolt height difference portions 38 are provided on the edges of the four bolt holes 36 respectively.

[0042] The four bolts with height differences 38 are configured such that the protrusion heights from the first opposing surface 20A are approximately the same, and the surfaces that contact the lower side beam 12 are formed to be approximately flat. Therefore, with the lower support 20 and the lower side beam 12 assembled, the four bolts with height differences 38 are configured to contact the side surface 12B of the lower side beam 12.

[0043] The adhesive material level difference portion 40 is configured such that it protrudes inward in the vehicle width direction (towards the lower side beam 12) from the first opposing surface 20A and is provided with adhesive material (not shown). Furthermore, in this embodiment, the adhesive material level difference portion 40 is arranged in a manner that it is divided into multiple portions around the bolt level difference portion 38, spaced apart by a predetermined gap from the bolt level difference portion 38. The adhesive material disposed on the adhesive material level difference portion 40 is not limited to a liquid adhesive that cures under predetermined conditions; double-sided tape and thermosetting resins can be widely used.

[0044] In this embodiment, as an example, six adhesive material height difference portions 40 are arranged on the first opposing surface 20A along the vehicle's longitudinal direction, and a predetermined gap is provided between adjacent adhesive material height difference portions 40. For the six adhesive material height difference portions 40, the protrusion height from the first opposing surface 20A is set to be approximately the same, and is formed to be slightly lower than the bolt height difference portion 38.

[0045] The adhesive material height difference portion 40 located at the rear is formed into a generally rectangular shape. The second adhesive material height difference portion 40 adjacent to the front of this adhesive material height difference portion 40 is adjacent to the rear of the bolt height difference portion 38 at the rear, and the front and lower corners are curved into a generally arc shape along the shape of the bolt height difference portion 38.

[0046] The third adhesive material height difference portion 40, adjacent to the front of the first adhesive material height difference portion 40, is adjacent to the front of the last bolt height difference portion 38, and its rear and lower corners are bent into a generally rounded shape along the shape of the bolt height difference portion 38. Furthermore, this adhesive material height difference portion 40 is also adjacent to the rear of the second bolt height difference portion 38 from the rear, and its front and upper corners are bent into a generally rounded shape along the shape of the bolt height difference portion 38.

[0047] The fourth adhesive material height difference portion 40, which is adjacent to the front of the first adhesive material height difference portion 40, is adjacent to the front of the second bolt height difference portion 38 from the rear, and the rear and upper corners are bent into a generally rounded shape along the shape of the bolt height difference portion 38. Furthermore, this adhesive material height difference portion 40 is also adjacent to the rear of the third bolt height difference portion 38 from the rear, and the front and lower corners are bent into a generally rounded shape along the shape of the bolt height difference portion 38.

[0048] The fifth adhesive material height difference portion 40, which is adjacent to the front of the third bolt height difference portion 38 from the rear, is adjacent to the front of the third bolt height difference portion 38, and the rear and lower corners are bent into a generally rounded shape along the shape of the bolt height difference portion 38. Furthermore, this adhesive material height difference portion 40 is also adjacent to the rear of the fourth bolt height difference portion 38 from the rear, and the front and upper corners are bent into a generally rounded shape along the shape of the bolt height difference portion 38.

[0049] The sixth adhesive material height difference portion 40, which is adjacent to the front of the adhesive material height difference portion 40, is adjacent to the front of the fourth bolt height difference portion 38 from the rear, and the rear and upper corners are bent into a generally arc shape along the shape of the bolt height difference portion 38.

[0050] Furthermore, two recesses 50 are formed on the first opposing surface 20A. One recess 50 is formed at a position adjacent to the bolt height difference portion 38 at the rear, and the other recess 50 is formed at a position adjacent to the third bolt height difference portion 38 from the rear.

[0051] On the other hand, on the second opposing surface 20B of the lower part 20 of the support column, a plurality of bolt height difference portions 44 and a plurality of adhesive material height difference portions 42 are provided. The bolt height difference portions 44 and the adhesive material height difference portions 42 are configured to protrude from the second opposing surface 20B toward the vehicle's lower side (lower side beam 12 side) and are provided with adhesive material (not shown).

[0052] Bolt height difference portions 44 are provided on the front and rear portions of the second opposing surface 20B, and are respectively formed into approximately rectangular shapes. In addition, bolt height difference portions 44 are respectively formed to surround the edge of the bolt hole 52.

[0053] In this embodiment, five adhesive material height difference portions 42 are provided along the front-rear direction of the vehicle, and a predetermined gap is provided between adjacent adhesive material height difference portions 42. For the five adhesive material height difference portions 42, the protrusion height from the second opposing surface 20B is set to be approximately the same, and is formed to be slightly lower than the bolt height difference portion 44.

[0054] The five adhesive material height difference portions 42 are formed into approximately the same shape and are set to approximately rectangular shape. In addition, a bolt height difference portion 44 is provided between the last adhesive material height difference portion 42 and the second adhesive material height difference portion 42 from the last part.

[0055] (effect)

[0056] Next, the function of the vehicle fastening structure involved in this embodiment will be explained.

[0057] In the vehicle fastening structure of this embodiment, bolt holes 36 are opened on the first opposing surface 20A of the lower support 20, which is opposite to the lower side beam 12, and bolts 100 (see reference) Figure 2 It can be screwed into the bolt hole 36. In addition, a bolt height difference portion 38 protrudes from the first opposing surface 20A of the lower part 20 of the support column to the side beam 12. The bolt height difference portion 38 surrounds the edge of the bolt hole 36 and is connected to the lower side beam 12.

[0058] Furthermore, an adhesive material level difference portion 40 protrudes from the first opposing surface 20A of the lower support portion 20 towards the lower side beam 12, and adhesive material is disposed on the adhesive material level difference portion 40. In this way, since the bolt level difference portion 38 and the adhesive material level difference portion 40 both protrude from the first opposing surface 20A, the diffusion of adhesive material around the bolt holes 36 can be suppressed when assembling the lower support portion 20 and the lower side beam 12.

[0059] Furthermore, the adhesive material level difference portion 40 is arranged in a manner that separates it from the bolt level difference portion 38 and divides it into multiple portions around the bolt level difference portion 38. Thus, by allowing the adhesive material to enter between adjacent adhesive material level difference portions 40, the adhesive material is prevented from spreading to unintended areas, thereby effectively maintaining the tightness of the lower support portion 20 and the lower beam 12.

[0060] In particular, in this embodiment, since the lower support column 20 is fastened to the lower side beam 12 via the first opposing surface 20A and the second opposing surface 20B, the lower support column 20 can be installed in both the vehicle width direction and the vehicle vertical direction. Furthermore, since the first opposing surface 20A is provided with a bolt height difference portion 38 and an adhesive material height difference portion 40, the first opposing surface 20A can be fixed by bolts 100 and adhesive material.

[0061] Furthermore, since the second opposing surface 20A is also provided with a bolt height difference portion 44 and an adhesive material height difference portion 42, it is possible to fix it on both the first opposing surface 20A and the second opposing surface 20B by bolts and adhesive material.

[0062] Furthermore, in this embodiment, since the adjacent bolt holes 36 are formed in staggered positions in a manner that is offset from each other in the vertical direction of the vehicle, compared with the case where the bolt holes 36 are arranged in a straight line, the fastening state can be well maintained relative to the external forces input in both the vertical and longitudinal directions of the vehicle.

[0063] Furthermore, in this embodiment, since the front module 18, including the lower part 20 of the support column, is a vehicle frame component formed by die casting, it is difficult to join it by welding or the like. Even so, the vehicle frame component can be firmly fixed to the fastened component by bolts and adhesive materials. In this way, in the vehicle fastening structure according to this embodiment, a good fastening state can be maintained in a vehicle fastening structure that combines bolt-based mechanical fastening and adhesive-based joining.

[0064] Although the vehicle fastening structure involved in the embodiments has been described above, it is obvious that it can be implemented in various ways without departing from the spirit of the invention. For example, although four bolt holes 36 are formed on the first opposing surface 20A in the above embodiments, the number of bolt holes 36 is not limited thereto.

[0065] Furthermore, although six segmented height difference portions 40 for adhesive material are provided on the first opposing surface 20A in the above embodiment, this is not a limitation. For example, the number of height difference portions 40 for adhesive material can be five or less, or seven or more. Further, although two bolt height difference portions 44 and five adhesive material height difference portions 42 are provided on the second opposing surface 20A in the above embodiment, this is not a limitation, and the number of bolt height difference portions 44 and adhesive material height difference portions 42 can be appropriately varied. Additionally, a structure can be provided in which only the adhesive material height difference portions 42 are provided, without the bolt height difference portions 44.

[0066] Furthermore, in the above embodiments, the shapes of the bolt height difference portions 38 and 40 and the adhesive material height difference portions 40 and 42 are not particularly limited, and other shapes may also be used. Furthermore, although the fastening target member is set as the lower part 20 of the support column of the front module 18 in the above embodiments, it is not limited to this and can be applied to other parts. For example, the fastening member may also be set as a vehicle frame member constituting the rear of the vehicle. In this case, the present invention is applied to the fastening structure of the rear end of the lower side beam and the rear module.

[0067] Regarding the above-described embodiments, the following notes are disclosed.

[0068] (Postscript 1)

[0069] A vehicle fastening structure having:

[0070] A bolt hole is an opening on the opposing surface of the fastened component, which is opposite to the component being fastened, and is used for bolt engagement.

[0071] The bolt has a height difference portion that protrudes from the opposing surface toward the fastened member and surrounds the edge of the bolt hole, and is in contact with the fastened member;

[0072] The adhesive material is disposed on a section with a height difference, which protrudes from the opposing surface toward the fastened member and is covered with adhesive material.

[0073] The adhesive material is configured in such a way that the height difference portion is spaced apart and divided into multiple portions around the height difference portion of the bolt relative to the height difference portion of the bolt.

[0074] (Postscript 2)

[0075] The vehicle fastening structure as described in Appendix 1, wherein...

[0076] The opposing surfaces are configured to include a first opposing surface opposite the fastened member in the vehicle width direction and a second opposing surface opposite the fastened member in the vehicle vertical direction.

[0077] (Note 3)

[0078] The vehicle fastening structure as described in Appendix 2, wherein...

[0079] On the first opposing surface, there are height difference portions for the bolt and height difference portions for the adhesive material.

[0080] At least one height difference portion for the adhesive material is provided on the second opposing surface.

[0081] (Postscript 4)

[0082] The vehicle fastening structure as described in any one of Notes 1 to 3, wherein...

[0083] The bolt holes are formed in a plurality of them along the longitudinal direction of the vehicle, and adjacent bolt holes are formed in staggered positions in a manner offset from each other in the vertical direction of the vehicle.

[0084] (Note 5)

[0085] The vehicle fastening structure as described in any one of Appendices 1 to 4, wherein...

[0086] The fastening object component is a vehicle frame component formed by die casting and constituting the vehicle frame.

[0087] Symbol Explanation

[0088] 12. Lower beam (the fastened component);

[0089] 18. Front module (fastening object component, vehicle frame component);

[0090] 20A, First Opposite Plane;

[0091] 20B, Second Opposite Plane;

[0092] 36. Bolt holes;

[0093] 38, 44, Bolts with varying heights;

[0094] 40, 42, Adhesive materials for areas with height differences;

[0095] 100. Bolts.

Claims

1. A vehicle fastening structure, comprising: A bolt hole is an opening on the opposing surface of the fastened component, which is opposite to the component being fastened, and is used for bolt engagement. The bolt has a height difference portion that protrudes from the opposing surface toward the fastened member and surrounds the edge of the bolt hole, and is in contact with the fastened member; The adhesive material is disposed on a section with a height difference, which protrudes from the opposing surface toward the fastened member and is covered with adhesive material. The adhesive material is configured in such a way that the height difference portion is spaced apart and divided into multiple portions around the height difference portion of the bolt relative to the height difference portion of the bolt.

2. The vehicle fastening structure as described in claim 1, wherein, The opposing surfaces are configured to include a first opposing surface opposite the fastened member in the vehicle width direction and a second opposing surface opposite the fastened member in the vehicle vertical direction.

3. The vehicle fastening structure as described in claim 2, wherein, On the first opposing surface, there are height difference portions for the bolt and height difference portions for the adhesive material. At least one height difference portion for the adhesive material is provided on the second opposing surface.

4. The vehicle fastening structure as described in claim 1, wherein, The bolt holes are formed in a plurality of them along the longitudinal direction of the vehicle, and adjacent bolt holes are formed in staggered positions in a manner offset from each other in the vertical direction of the vehicle.

5. The vehicle fastening structure as described in any one of claims 1 to 4, wherein, The fastening object component is a vehicle frame component formed by die casting and constituting the vehicle frame.

Images