Seat carrier construction

Abstract

The present application makes the joint between a seat bracket supporting a seat and a floor cross member difficult to peel. A seat bracket structure (10) has: a floor cross member (15a, 15b) that links a lower longitudinal member (12a, 12b) of a vehicle and a floor tunnel (13); and a plurality of seat brackets (16a to 16d) that are arranged in the front-rear direction of the vehicle front-rear of the floor cross member (15a, 15b) and link the lower longitudinal member (12a, 12b) or the floor tunnel (13) and the floor cross member (15a, 15b). The seat bracket (16a to 16d) is configured with: a main body portion (16a4, 16b4) that forms a hollow cross section with a floor panel (11) as a bottom surface and is separated from the floor cross member (15a, 15b); and a link portion (16a3, 16b3) that is combined with the floor panel (11) from the main body portion (16a4, 16b4) and extends in the front-rear direction and links with a bracket (15a2) that is a lower end portion of the floor cross member (15a, 15b).

Description

Technical Field

[0001] The present invention relates to a seat bracket structure that is integrated onto the floor panel of a vehicle and serves to mount a seat. Background Technology

[0002] Conventionally, seat bracket structures have a configuration that connects the seat bracket to a floor crossbeam (also called a crossbeam), which supports and mounts a seat for occupants. The crossbeam extends in the vehicle width direction and intersects and engages with a floor passageway extending in the vehicle's longitudinal direction. In Patent Document 1, a seat bracket of a predetermined length engages along a lower longitudinal beam extending in the vehicle's longitudinal direction, and the seat bracket of the predetermined length engages with the side of the floor passageway. The closed-section end of the crossbeam is engaged on both the side of the seat bracket engaging with the lower longitudinal beam and the side of the seat bracket engaging with the floor passageway.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-43155 Summary of the Invention

[0006] However, in the case of a structure where the seat bracket and the closed section end of the crossbeam are joined as described in Patent Document 1, when multiple loads are input to the seat bracket in multiple directions, the joint between the seat bracket and the crossbeam will twist in three dimensions. That is, because the closed section end of the highly rigid crossbeam is joined to the seat bracket in the vertical and horizontal directions, the following situation occurs when multiple loads are input in the vertical and horizontal directions: Specifically, when a load that causes the crossbeam to move upward and the seat bracket to move downward is input, the vertical joint becomes prone to peeling off. When a load that causes the crossbeam and the seat bracket to move in different left and right directions is input, the horizontal joint becomes prone to peeling off.

[0007] The present invention was made in view of this situation, and its purpose is to provide a seat bracket structure that makes it difficult to detach the joint between the seat bracket supporting the seat and the floor beam.

[0008] To achieve the above objectives, the seat bracket structure of the present invention includes: a floor beam connecting a lower longitudinal beam of a vehicle and a floor passage; and a plurality of seat brackets disposed in the front and rear directions of the floor beam in the vehicle longitudinal direction and connecting the lower longitudinal beam or the floor passage to the floor beam. The seat bracket structure is characterized in that the seat bracket has: a main body portion having a floor panel as the bottom surface forming a hollow cross section and being separated from the floor beam; and a connecting portion extending from the main body portion along the upper surface of the floor panel in the front and rear direction and connecting to the lower end of the floor beam.

[0009] Invention Effects

[0010] This invention provides a seat bracket structure that makes it difficult to separate the joint between the seat bracket supporting the seat and the floor beam. Attached Figure Description

[0011] Figure 1 This is a perspective view showing the structure of the seat bracket on the floor panel inside the vehicle according to this embodiment.

[0012] Figure 2 It is a three-dimensional diagram showing the seat bracket structure in front of and behind the crossbeam on the side of the lower longitudinal beam.

[0013] Figure 3 This is a perspective view showing the seat bracket structure in front of and behind the crossbeam between the lower longitudinal beam and the floor passage.

[0014] Figure 4 It is a three-dimensional view showing the connection between the seat bracket on the lower longitudinal beam side and the floor frame and crossbeam.

[0015] Figure 5 yes Figure 4 V-V sectional view.

[0016] Figure 6 It is a three-dimensional view showing the walls of the main body of the seat bracket.

[0017] Figure 7 Based on Figure 6 The side view of the seat bracket obtained from section VII-VII.

[0018] Explanation of reference numerals in the attached figures

[0019] 10 Seat bracket construction

[0020] 11 Floor Panels

[0021] 12a, 12b lower longitudinal beams

[0022] 13 Floor Passage

[0023] 14a, 14b floor frames

[0024] 14a1 Third flange

[0025] 15a, 15b floor beams

[0026] 15a2 Second flange

[0027] 16a~16d seat brackets

[0028] 16a3, 16b3 connecting parts

[0029] 16a4 main body

[0030] 16a5 First flange

[0031] a3a reinforcing rib (reinforcing section)

[0032] A41 Fastener

[0033] A42 top

[0034] A43 Anterior Wall

[0035] A44 Rear Wall

[0036] A45 sidewall Detailed Implementation

[0037] <Structure of the Implementation Method>

[0038] Reference Figures 1 to 7 The embodiments of the present invention will be described in detail below. In this description, the same reference numerals are used to refer to the same elements, and repeated descriptions are omitted. Furthermore, in each figure, "front and back" indicated by arrows represents the front-to-back direction of the vehicle (not shown), "left and right" represents the width direction of the vehicle, and "up and down" represents the vertical direction.

[0039] Figure 1 It is a three-dimensional diagram showing the structure of the seat brackets on the floor panel inside the car.

[0040] Figure 1 The seat bracket structure 10 shown includes a floor panel 11, lower longitudinal beams 12a and 12b, a floor passage 13, and floor frames 14a and 14b (see reference). Figure 4 Floor crossbeams 15a and 15b and multiple seat brackets 16a, 16b, 16c, and 16d. However, each seat bracket 16a to 16d is positioned symmetrically on the left and right sides of the floor passageway 13, therefore only the left side in the vehicle width direction is marked with the attached diagram for illustrative purposes.

[0041] The lower longitudinal beams 12a and 12b extend in the vehicle's longitudinal direction (also known as the front-rear direction) and engage with the outer edge of the floor panel 11 in the vehicle width direction. The floor passage 13 extends in the front-rear direction between the lower longitudinal beams 12a and 12b on both sides of the vehicle. Moreover, the floor passage 13 engages with the inner edge of the floor panel 11 in the vehicle width direction with the passage opening towards the lower exterior side (outdoor side) of the vehicle.

[0042] Floor beams (also called crossbeams) 15a and 15b extend along the vehicle width direction, connecting the lower longitudinal beams 12a and 12b and the floor passage 13 respectively. For example... Figure 2As shown, the left-side crossbeam 15a forms a hollow section (closed section) with the floor panel 11 as its bottom surface. Longitudinal flanges 15a1, 15a1, which are bent to the left and right (corresponding to the front and rear of the vehicle) at the ends of the closed section of the crossbeam 15a, are joined to the inner side of the lower longitudinal beam 12a by welding or the like. Figure 4 On the other end of the crossbeam 15a shown, the longitudinal flange at the closed section end also engages with the outer side in the vehicle width direction facing the floor passage 13. The right-side crossbeam 15b has the same construction as the left-side crossbeam 15a, so its description is omitted.

[0043] like Figure 1 As shown, seat brackets 16a to 16d are components that mount and support seats (not shown) for occupants, and are located on the front and rear sides of crossbeams 15a and 15b in the vehicle's longitudinal direction. Each seat bracket 16a to 16d is connected to the lower longitudinal beam 12a or the floor channel 13, and is also connected to the crossbeam 15a.

[0044] Figure 2 The seat brackets 16a and 16b on the side of the lower longitudinal beam 12a shown have main body portions 16a4 and 16b4 that form a hollow cross section with the floor panel 11 as the bottom surface and extend from the crossbeam 15a in the front-rear direction. Furthermore, the seat brackets 16a and 16b have connecting portions 16a3 and 16b3 that extend from the lower end of the main body portions 16a4 and 16b4 along the upper surface of the floor panel 11 in the front-rear direction. The connecting portions 16a3 and 16b3 are lower in height and flatter in shape than the main body portions 16a4 and 16b4. The connecting portions 16a3 and 16b3 are connected to flanges 15a2 and 15b2 that extend from the lower end of the crossbeam 15a along the upper surface of the floor panel 11 in the front-rear direction. Moreover, the seat brackets 16a and 16b have longitudinal flanges 16a1 and 16b1 that bend to the left and right (front and rear of the vehicle) from the closed cross section ends of the main body portions 16a4 and 16b4. Longitudinal flanges 16a1 and 16b1 engage with the side of the lower longitudinal beam 12a in the vehicle width direction. Furthermore, flanges 16a2 and 16b2, extending along the vehicle width direction from the upper part of the closed section end of the main body portions 16a4 and 16b4, engage with the upper surface of the lower longitudinal beam 12a. Similarly, the seat brackets 16c and 16d on the floor passage 13 side also have a main body and a connecting portion.

[0045] by Figure 2 The seat bracket 16a shown is used as an example for explanation. The connecting portion 16a3 of the seat bracket 16a extends rearward from the lower end of the main body 16a4 along the upper surface of the floor panel 11, forming a first flange 16a5 that overlaps with the second flange 15a2 of the crossbeam 15a. Thus, the floor panel 11, the first flange 16a5 of the seat bracket 16a (which serves as the connecting portion 16a3), and the second flange 15a2 of the crossbeam 15a are welded together.

[0046] In addition, besides the flange extending rearward from the main body 16a4 (towards the crossbeam 15a) as described above, the first flange 16a5 also has a first flange extending forward and a first flange 16a5 extending from the main body 16a4 in the vehicle width direction towards the vehicle interior.

[0047] The first flange 16a5 (or connecting portion 16a3) of the seat bracket 16a has a plurality of reinforcing ribs a3a extending in the vehicle longitudinal direction and arranged at predetermined intervals in the vehicle width direction. The reinforcing ribs a3a constitute the reinforcing portion in the technical solution. The arrangement of a plurality of reinforcing ribs a3a in the first flange 16a5 can also be described as the arrangement of a plurality of reinforcing ribs a3a in the connecting portion 16a3.

[0048] For example, suppose an excessive load is applied to the connection 16a3 without reinforcing rib a3a. In this case, if the end of the weld between the connection 16a3 and the floor panel 11 begins to peel off, other welded parts will also peel off, causing the entire connection 16a3 to peel off.

[0049] However, as in this embodiment, when multiple reinforcing ribs a3a are formed at intervals in the connecting portion 16a3, the reinforcing ribs a3a exist between the multiple welded portions. Therefore, even if one welded portion of the connecting portion 16a3 peels off, energy is absorbed through the extension of the reinforcing ribs a3a in the peeling direction. Through this absorption, a chain reaction of peeling of the connecting portion 16a3 does not occur, and the peeling stops midway, thus suppressing the chain reaction of peeling of the welded portions.

[0050] All the first flanges 16a5 of the seat bracket 16a are welded to the floor panel 11 using an adhesive spot welding method. The connecting portion 16a3 and the second flange 15a2 of the crossbeam 15a are spot welded together in the portion excluding the reinforcing rib a3a. Adhesive spot welding refers to a method of applying adhesive at predetermined intervals along the long side of the first flange 16a5 and spot welding the portions not coated with this adhesive. By joining the first flanges 16a5 of the seat bracket 16a to the floor panel 11 using this adhesive spot welding method, the joint strength is improved.

[0051] like Figure 4As shown, on the lower outer side of the floor panel 11 between the seat brackets 16a and 16b on the lower longitudinal beam 12a side and the seat brackets 16c and 16d on the floor passage 13 side, there are two floor frames 14a extending parallel to each other in the vehicle's longitudinal direction. In other words, the floor frames 14a are disposed below the floor panel 11 between the seat brackets 16a and 16b and the seat brackets 16c and 16d, which are separately arranged in the vehicle width direction. In addition, the floor frames 14a have third flanges 14a1 on both sides (left and right sides) in the vehicle width direction (see reference). Figure 5 ).

[0052] by Figure 4 V-V sectional view, i.e. Figure 5 The seat bracket 16a will be used as an example for explanation. Figure 5 The first flange 16a5 of the seat bracket 16a, extending inward in the vehicle width direction, clamps the floor panel 11 and welds it to the third flange 14a1 of the floor frame 14a. Additionally, towards... Figure 4 The first flange 16a5 extending from the rear side of the seat bracket 16a shown engages with the second flange 15a2 of the crossbeam 15a.

[0053] In this way, the two first flanges 16a5 of the seat bracket 16a sandwich the third flange 14a1 of the floor panel 11 and the floor frame 14a. Figure 5 It is joined to the second flange 15a2 of the crossbeam 15a, thereby serving the following purpose.

[0054] Figure 4 As shown by arrow Y4, the load transmitted along the rear side of the lower longitudinal beam 12a is transmitted via arrow Y5 to the first flange 16a5 in the vehicle width direction through the main body 16a4 of the seat bracket 16a, and then to the rearward first flange 16a5 (connecting part 16a3) as shown by arrow Y7. The load transmitted to the first flange 16a5 in the vehicle width direction is transmitted to the crossbeam 15a via the floor frame 14a as shown by arrow Y6. The load transmitted to the rearward first flange 16a5 is transmitted to the crossbeam 15a via the floor frame 14a as shown by arrow Y7. That is, the load input to the seat bracket 16a can be distributed to the floor frame 14a as shown by arrow Y6 and the crossbeam 15a as shown by arrow Y7.

[0055] The various loads transmitted to the crossbeam 15a are transmitted to the inside of the vehicle in the vehicle width direction (long side direction) of the crossbeam 15a as shown by arrow Y8.

[0056] like Figure 6As shown, the third flanges 14a1 on both sides of the floor frame 14a in the vehicle width direction and the second flanges 15a2 on the front and rear sides of the crossbeam 15a are joined (welded) to the floor panel 11. By welding the floor frame 14a and the crossbeam 15a in this way, the load input to the floor frame 14a can be transferred to the crossbeam 15a.

[0057] like Figure 6 As shown, the main body 16a4 of the front seat bracket 16a includes: a top a42 having a seat fastening part a41 (not shown); a front wall a43 extending downward from the top a42 toward the front of the vehicle; a rear wall a44 toward the rear; and a side wall a45 toward the interior of the vehicle in the vehicle width direction. Similarly, the rear seat bracket 16b also includes a top b42, a front wall b43, a rear wall b44, and a side wall b45, all having fastening parts b41.

[0058] Figure 7 This is a side view taken from the side of the lower longitudinal beam 12a facing the seat brackets 16a and 16b. The front wall a43 and rear wall a44 of the front seat bracket 16a are inclined in a manner that extends downwards from top to bottom (in a V-shape). The front wall b43 and rear wall b44 of the rear seat bracket 16b are in the same manner.

[0059] Here, if we assume that the front wall a43 and rear wall a44 of the seat bracket 16a are vertically erected relative to the floor panel 11, the seat is prone to tipping over when a load is applied in the longitudinal direction of the vehicle. As in this embodiment, when the front wall a43 and rear wall a44 of the seat bracket 16a are tilted in a V-shape, they can resist and absorb the load in the longitudinal direction, thus making it difficult for the seat to tip over.

[0060] <Effects of the Implementation Method>

[0061] Next, the features and effects of the seat bracket structure of this embodiment described above will be explained.

[0062] The seat bracket structure 10 includes: floor beams 15a and 15b that connect the lower longitudinal beams 12a and 12b of the vehicle to the floor passage 13; and multiple seat brackets 16a to 16d that are arranged in the front and rear directions of the floor beams 15a and 15b in the vehicle's longitudinal direction and connect the lower longitudinal beams 12a and 12b or the floor passage 13 to the floor beams 15a and 15b.

[0063] (1) The seat brackets 16a to 16d are configured to have: a main body 16a4 and 16b4 that form a hollow cross section with the floor panel 11 as the bottom surface and are separated from the floor beams 15a and 15b; and a connecting part 16a3 and 16b3 that are connected to the floor panel 11 from the main body 16a4 and 16b4, extend in the front-rear direction, and are connected to the bracket 15a2 as the lower end of the floor beams 15a and 15b.

[0064] According to this configuration, the seat brackets 16a-16d are connected to the lower end of the crossbeam 15a via connecting portions 16a3 and 16b3, thereby allowing the height of the connecting portions 16a3 and 16b3 to be set low in a generally planar manner. By setting the connecting portions 16a3 and 16b3 low, when three-dimensional loads are input from multiple directions, such as side impacts or torsion of the vehicle body, the connecting portions 16a3 and 16b3 can suppress torsion. This suppression can prevent breakage and peeling of the connection between the seat brackets 16a-16d and the crossbeam 15a. Therefore, the transmission path of the input load to the crossbeam 15a can be maintained.

[0065] For example, Figure 3 As shown by arrow Y1, the load transmitted from the lower longitudinal beam 12a toward the rear of the vehicle is transmitted from the main body 16a4 of the seat bracket 16a to the crossbeam 15a via the connecting portion 16a3, as shown by arrow Y2, and is transmitted along the long side of the crossbeam 15a, as shown by arrow Y3. The input load indicated by arrow Y2 is resisted by the torsion of the generally planar connecting portion 16a3 welded to the floor panel 11, and thus the torsion is absorbed and suppressed. That is, the connecting portion 16a3 allows for the absorption of deformation caused by torsion, thus suppressing the peeling of the welded portion between the seat bracket 16a and the crossbeam 15a. In other words, the joint between the seat brackets 16a-16d supporting the seat and the crossbeam 15a becomes difficult to peel off.

[0066] (2) The seat bracket (e.g., seat bracket 16a) has a first flange 16a5 extending from the lower end of the main body 16a4 along the upper surface of the floor panel 11 toward the crossbeam 15a. The connecting portion 16a3 is formed by extending the first flange 16a5 to the lower end of the crossbeam 15a, i.e., the second flange 15a2.

[0067] According to this configuration, the first flange 16a5, which is connected to the floor panel 11 of the seat bracket 16a, extends to the second flange 15a2 of the crossbeam 15a, thereby forming a connecting portion 16a3. This configuration allows the height of the connecting portion 16a3 to be set low in a generally planar shape. When a three-dimensional load is applied to the vehicle body, the generally planar connecting portion 16a3 can resist torsion and suppress twisting, thus preventing breakage and separation of the connection between the seat bracket 16a and the crossbeam 15a.

[0068] (3) The first flange 16a5 has a plurality of reinforcing ribs a3a that extend in the front-rear direction and are provided at predetermined intervals in the vehicle width direction as reinforcing parts.

[0069] According to this configuration, the first flange 16a5 has multiple reinforcing ribs a3a, so that even if one welded part of the connecting portion 16a3 peels off, energy is absorbed through the extension of the reinforcing ribs a3a. Therefore, a chain reaction of peeling of the first flange 16a5 does not occur, and peeling stops midway, thus suppressing the chain reaction of peeling of the welded parts. Therefore, even for a configuration in which the height of the connecting portion 16a3 formed by the first flange 16a5 is reduced in a generally planar shape, the rigidity of the connecting portion 16a3 can be ensured, thus enabling the transfer of the load input to the seat bracket 16a to the crossbeam 15a.

[0070] (4) The first flange 16a5 of the seat bracket 16a is welded with adhesive between it and the floor panel 11, and the connecting part 16a3 and the second flange 15a2 of the crossbeam 15a are joined by spot welding.

[0071] According to this configuration, the first flange 16a5 of the seat bracket 16a and the floor panel 11 are joined by adhesive spot welding, and the connecting portion 16a3 is joined to the crossbeam 15a by spot welding. Therefore, the rigidity of the seat bracket body 16a4 is improved, and the load input to the seat bracket 16a can be efficiently transferred from the connecting portion 16a3 to the crossbeam 15a.

[0072] (5) The floor frame 14a extends along the vehicle's longitudinal direction on the lower outdoor side of the floor panel 11, and has a third flange 14a1 in the vehicle width direction. The floor frame 14a is disposed between seat brackets 16a and 16c, which are separately arranged in the vehicle width direction. The first flange 16a5 of the seat brackets 16a and 16c clamps the floor panel 11 and is welded to the third flange 14a1 of the floor frame 14a and 14b.

[0073] Based on this structure, it is possible to... Figure 4 As indicated by arrows Y4 and Y5, the load on the input seat bracket 16a is distributed to the floor frame 14a and crossbeam 15a via the floor panel 11, as indicated by arrows Y6 and Y7. This prevents the seat bracket 16a from detaching from the floor panel 11.

[0074] (6) The floor frame 14a1 and the second flange 15a2 of the crossbeam 15a are joined together with the floor panel 11.

[0075] According to this configuration, the floor frame 14a and the crossbeam 15a are welded together, thereby enabling the transfer of loads input to the floor frame 14a to the crossbeam 15a. This allows loads to be transferred from the seat bracket 16a to the crossbeam 15a via the floor frame 14a, thus preventing the seat bracket 16a from peeling off.

[0076] (7) The seat bracket 16a's main body 16a4 comprises: a top a42 having a seat fastening part a41; a front wall a43 extending downward from the top a42 toward the front of the vehicle; a rear wall a44 toward the rear; and a side wall a45 toward the vehicle width direction. The front wall a43 and the rear wall a44 of the seat bracket 16a are inclined in a manner that extends downward from top to bottom (in a V-shape).

[0077] With this configuration, the front wall a43 and rear wall a44 of the seat bracket 16a are inclined in a V-shape, thus resisting and absorbing loads in the front-to-back direction, making it difficult for the seat to tip over. In other words, the inclination of the front wall a43 and rear wall a44 ensures rigidity for the seat bracket 16a when tilting in and for loads input from the seat. Furthermore, the V-shape allows for a shorter distance from the main body 16a4 of the seat bracket 16a to the crossbeam 15a, thereby shortening the length of the connecting portion 16a3 and enabling efficient load transfer from the seat bracket 16a to the crossbeam 15a.

[0078] The above describes the vehicle body structure of this embodiment, but the present invention is not limited thereto and can be appropriately modified within the scope of the present invention without departing from the spirit of the present invention.

Claims

1. A seat bracket structure, comprising: The floor crossbeam connecting the vehicle's lower longitudinal beam and the floor passage; and A plurality of seat brackets are configured in the fore-and-aft direction of the floor crossbeam and connect the lower longitudinal beam or the floor passage to the floor crossbeam, wherein the seat brackets are characterized in that... The seat bracket has: The main body, consisting of a floor panel forming a hollow cross-section as its bottom surface and separated from the floor beams; and A connecting portion extending from the main body along the upper surface of the floor panel in the front-rear direction and connecting to the lower end of the floor beam. The seat bracket has a first flange extending from the lower end of the main body along the upper surface of the floor panel toward the floor beam side. The connecting portion is formed by the first flange extending to the lower end of the floor beam, namely the second flange.

2. The seat bracket structure according to claim 1, characterized in that, The first flange has a plurality of reinforcing portions extending in the longitudinal direction of the vehicle and arranged at predetermined intervals in the width direction of the vehicle.

3. The seat bracket structure according to claim 2, characterized in that, The first flange of the seat bracket is welded to the floor panel by interlocking adhesive. The connecting part is spot welded to the second flange of the floor beam.

4. The seat bracket structure according to claim 3, characterized in that, The floor panel has a floor frame extending along the vehicle's longitudinal direction on the lower outdoor side, and the floor frame has a third flange in the vehicle width direction. The floor frame is disposed between seat brackets that are separately configured in the vehicle width direction. The first flange of the seat bracket clamps the floor panel and is welded to the third flange of the floor frame.

5. The seat bracket structure according to claim 4, characterized in that, The third flange of the floor frame and the second flange of the floor beam clamp the floor panel together.

6. The seat bracket structure according to claim 1, characterized in that, The main body of the seat bracket includes: a top having a seat fastening part; and a front wall extending downward from the top and facing the front of the vehicle. The rear wall, which faces the rearward direction; and the side walls, which face the width of the vehicle. The front wall and the rear wall are inclined in a manner that expands from top to bottom.

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