JP2018165106A - Side sill structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side sill structure including rigidity and impact absorption property.SOLUTION: A side sill structure includes: a side sill body part installed along a vehicle longitudinal direction in a lower part of a vehicle side door opening part; a tube body installed along a longitudinal direction of the side sill body part inside the side sill body part; and an expanded tube member installed in a longitudinal end of the tube body to deform the tube body in a diameter expanding direction when being subject to load toward a longitudinal center part of the tube body.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a side sill structure of a vehicle.

  The side sill is provided in the lower part of the opening part of the side door of a vehicle. The side sill is formed in a closed cross-sectional shape combining sheet metal members, and is disposed along the front-rear direction of the vehicle.

  There is a known accident where only the outer part of the vehicle collides with a collision object, which is called a small offset collision. In a small offset collision, a large amount of collision energy may be applied to the side sill located outside the vehicle. For example, an example in which a reinforcing member or the like is provided inside the side sill to improve rigidity is known.

  In general, in order to reduce human damage at the time of an accident, it is necessary to have the rigidity to secure a safe passenger compartment space even after a collision and the ease of crushing to absorb the energy of the collision and reduce the impact.

JP 2011-39347 A

  Side sill realizes a structure that satisfies both of these requirements, which is contradictory to the fragility that absorbs shock by deforming at the time of collision and the rigidity that suppresses deformation of the vehicle body due to collision and maintains a safe space in the passenger compartment. It was not easy.

  It is an object of the present invention to provide a side sill structure having a fragility that absorbs energy caused by a collision and relaxes an impact, and a rigidity that suppresses deformation during the collision and secures a safe space in the vehicle. .

  In order to solve the above-described problems, the present invention has a vehicle side sill structure configured as follows. The side sill structure includes a side sill main body provided along the longitudinal direction of the vehicle at a lower portion of the side door opening of the vehicle, a tube provided along the longitudinal direction of the side sill main body within the side sill main body, A tube expansion member that is provided at a longitudinal end portion of the tubular body and deforms the tubular body in the diameter expansion direction when a load is applied toward the longitudinal central portion of the tubular body.

  The vehicle side sill structure according to the present invention has the following effects. When the front wheel or the collision object collides with the side sill of the vehicle due to the small offset collision, and the side sill is deformed, the pipe expanding member is pushed into the tube body. When the tube expansion member is pushed into the tube body, the tube body is pushed outward and deformed, and the tube body is broken.

  Thus, the energy at the time of a collision is absorbed when a tubular body deform | transforms or it fractures | ruptures. Accordingly, damage to the occupant due to the small offset collision is reduced. When the energy at the time of collision is absorbed and the progress of the tube expansion member is stopped, the deformation of the vehicle is suppressed, and a safe space is secured in the vehicle interior.

The perspective view which shows the vehicle provided with the side sill structure of one Embodiment concerning this invention. The perspective view which shows the same side sill structure. The perspective view which shows a pipe expansion member. The partial side view which shows a part of the side sill structure. The partial side view which shows a part of the side sill structure. The partial side view which shows a part of the side sill structure. The perspective view which shows the pipe body and pipe expansion member of another example.

  A side sill structure according to an embodiment of the present invention will be described. FIG. 1 shows a vehicle 10. The vehicle 10 includes a hood 12, a front windshield glass 14, a roof 16, a front door 18, a rear door 20, a front fender panel 22, a side sill 24, a front wheel 26, a rear wheel 28, and a floor 30. It has. The side sill structure of the present invention is applied to the side sill 24.

  Hereinafter, in the description of the side sill structure, the forward direction of the vehicle 10 is defined as the front, the opposite is defined as the rear, and the left and right are defined along the width direction of the vehicle 10 with respect to the front direction. Further, the direction of gravity when the vehicle 10 is placed horizontally is defined as a downward direction, and vice versa.

  The vehicle 10 has a vehicle compartment 40 on the inner side defined by the front windshield glass 14, the roof 16, the front door 18, the rear door 20, and the floor 30. The vehicle 10 includes a front pillar 32, a center pillar 34, a rear pillar 36, a roof rail 38, and a side sill 24. Thus, a front door opening 42 and a rear door opening 44 are formed in the vehicle 10 on the side of the vehicle 10. The front door 18 is assembled to the front door opening 42, and the rear door 20 is assembled to the rear door opening 44 so as to be freely opened and closed.

  The floor 30 is provided at the bottom of the vehicle 10. Side sills 24 are provided on the left and right sides of the floor 30. The side sill 24 is provided between the base of the front pillar 32 and the base of the rear pillar 36 along the longitudinal direction of the vehicle 10. A side member 46 is also provided on the floor 30 inside the side sill 24 and substantially parallel to the side sill 24.

  The side sill 24 is shown in FIG. As shown in FIG. 2, the side sill 24 includes a side sill body portion 54 and a reinforcing portion 56. The side sill main body 54 includes a side sill outer plate 50 positioned outside the side sill 24 and a side sill inner plate 52 positioned inside the side sill 24.

  The side sill outer plate 50 is provided outside the vehicle 10. The side sill outer plate 50 is indicated by a two-dot chain line. The side sill inner plate 52 is provided on the vehicle interior side of the vehicle 10. The side sill outer plate 50 and the side sill inner plate 52 are welded in combination to form a side sill body 54 having a closed cross section. The side sill body 54 has a space inside. A reinforcing portion 56 is provided in the internal space of the side sill body portion 54.

  Next, the reinforcement part 56 is demonstrated. The reinforcing portion 56 includes a tubular body 60, a pipe expanding member 62, and a fixing portion 64. The tubular body 60 is a cylindrical member, and is formed of a metal such as iron, for example. The tubular body 60 has an outer diameter D1 and an inner diameter D2 (see FIG. 4), and has a predetermined strength. The tubular body 60 is basically a straight pipe and has an overall length L. The front end E1 of the tube body 60 is located at the front end of the side sill body 54, and the rear end E2 is located at the rear end of the side sill body 54. The tubular body 60 is fixed to the side sill main body 54 by a plurality of fixing portions 64.

  The fixing portion 64 includes a first fixing portion 64a, a second fixing portion 64b, a third fixing portion 64c, and a fourth fixing portion 64d in order from the front. The first fixing portion 64a is provided at the base of the front pillar 32, in the present embodiment, at the rear of the base of the front pillar 32. The second fixing portion 64 b and the third fixing portion 64 c are provided at the base portion of the center pillar 34. The fourth fixing portion 64d is provided at the base portion of the rear pillar 36.

  Each fixing portion 64 is formed in a substantially rectangular parallelepiped shape from a metal plate material. Each fixing portion 64 has a mounting piece 65 inside. Each fixing portion 64 is fixed to the side sill body 54 by welding each attachment piece 65 to the side sill inner plate 52. Each fixing portion 64 is formed with mounting holes 68 on two front and rear surfaces which are provided to face each other. The mounting hole 68 has an inner diameter that is substantially the same as the outer diameter D1 of the tube body 60.

  The tube body 60 penetrates the attachment hole 68 of each fixing portion 64 and is welded to the inner peripheral edge of the attachment hole 68. The front end E1 of the tubular body 60 protrudes from the first fixed portion 64a to the front by a length L2. A tube expansion member 62 is attached to the front end E1 of the tube body 60.

  The tubular body 60 is basically a straight pipe, but when the side sill body 54 is curved, it may be appropriately curved according to the side sill body 54. The cross section of the tube body 60 is a perfect circle, but may be an ellipse or other shapes.

  The pipe expansion member 62 is shown in FIG. The pipe expanding member 62 has a truncated cone shape. The pipe expanding member 62 is basically formed of a material having a hardness equal to or higher than that of the pipe body 60. For example, the pipe expansion member 62 is formed of a steel material with respect to the iron material of the pipe body 60.

  The expanded member 62 is formed such that the diameter D3 on one end F1 side is thinner than the inner diameter D2 of the tube body 60 and the diameter D4 on the other end F2 side is thicker than the inner diameter D2 of the tube body 60. The one end F1 side corresponds to a tip portion in the claims, and the other end F2 side corresponds to an enlarged portion. The diameter D4 on the other end F2 side is formed thicker than the mounting hole 68 of each fixing portion 64.

  The outer peripheral surface 70 of the pipe expansion member 62 basically has a linearly expanding diameter from one end F1 to the other end F2. The outer peripheral surface 70 is a side wall portion referred to in the claims. In addition, the outer peripheral surface 70 of the pipe expansion member 62 should just be changing continuously, for example, may curve so that it may swell outward or may be curved so that it may be dented inside. A protruding portion 67 is formed on the outer peripheral surface 70 of the pipe expanding member 62.

  The protruding portion 67 protrudes outward at a predetermined height from the one end F1 side to the other end F2 side so that the distal end has an acute angle from the outer peripheral surface 70 of the tube expansion member 62. The protruding portion 67 is continuously provided on the outer peripheral surface 70 of the pipe expanding member 62. The protrusions 67 are formed on the outer peripheral surface 70 of the pipe expanding member 62 in a plurality of lines and spirals at equal intervals in the circumferential direction of the outer peripheral surface 70 of the pipe expanding member 62.

  When the tube expansion member 62 is pushed into the tube body 60, the outer peripheral surface 70 of the tube expansion member 62 expands and deforms the tube body 60 in the radial direction, and the protrusions 67 bite into the inner surface of the tube body 60 to form a spiral shape. Grooves are formed in Further, the protrusion 67 breaks the tubular body 60 along the longitudinal direction when the pipe expanding member 62 is pushed into the tubular body 60.

  In addition, the protrusion part 67 does not need to be formed in the helical form. For example, the ridge 67 may be formed linearly in the direction along the generatrix of the outer peripheral surface 70 of the pipe expanding member 62 or may be a single piece. Basically, the protrusions 67 are preferably provided uniformly along the circumferential direction of the outer peripheral surface 70 of the pipe expanding member 62. Further, as shown in FIGS. 2 and 3, etc., the tube body 60, the tube expansion member 62, and the fixing portion 64 may be appropriately provided with holes for passing the electrodeposition liquid and reducing the weight.

  Next, the effect of the vehicle 10 provided with the side sill structure will be described. The side sill 24 of the vehicle 10 is provided below the front door opening 42 and the rear door opening 44. The side sill 24 includes a side sill body 54 and a reinforcing portion 56 provided inside the side sill body 54. The side sill body 54 is formed by assembling a side sill outer plate 50 and a side sill inner plate 52.

  The side sill 24 has a predetermined rigidity in the front-rear direction and the left-right direction, including the side sill body portion 54 and the reinforcing portion 56. Such a side sill structure is basically provided on the left and right sides of the vehicle 10 in the same manner. In addition, when the collision energy at the time of the small offset collision is dispersed due to other structural requirements of the vehicle 10 and the rigidity of the side sill 24 can be maintained, the side sill structure of the present embodiment is provided only on the left and right sides of the vehicle 10. It may be done.

  The pipe expansion member 62 is attached to the front end E1 on the front side of the pipe body 60. Assume that the vehicle 10 collides with a small offset. The small offset collision is an accident in which only one of the left and right sides of the vehicle 10 collides with the collision object 80 from the front. For example, the small offset collision collides only with a portion of about ¼ or less of the front surface of the vehicle 10. In the small offset collision, the collision object 80 basically does not directly contact the side member 46 of the vehicle 10 but collides with the side sill 24.

  When the colliding object 80 collides with the vehicle 10 due to the small offset collision, the front wheel 26 is dropped through the front wheel 26 or the front pillar 32 is pressed from the front. When the front pillar 32 is deformed rearward and the front wheel 26 or the colliding object 80 hits the pipe expansion member 62, the pipe expansion member 62 is pressed rearward, that is, toward the longitudinal center as defined in the claims.

  Since the pipe expansion member 62 is inserted into the pipe body 60, when the pipe expansion member 62 is pressed rearward, the pipe expansion member 62 advances inside the pipe body 60, and as shown in FIG. Push the inner surface radially. Further, the protrusion 67 of the pipe expanding member 62 forms a groove on the inner surface of the pipe body 60.

  When the pipe expanding member 62 is further pushed into the pipe body 60, the pipe body 60 is broken along the groove formed by the protrusion 67 on the inner surface of the pipe body 60, and a cut 69 is formed in the longitudinal direction. Further, since the protruding portion 67 is formed in a spiral shape on the outer peripheral surface 70 of the pipe expanding member 62, a groove formed on the inner surface of the tube body 60 or a cut 69 formed in the tube body 60 is formed on the tube body. It is formed in a spiral shape with respect to the center of 60.

  When the pipe expanding member 62 pushes the inside of the pipe body 60 or the protrusion 67 forms a groove on the inner surface of the pipe body 60, energy generated by the collision is consumed and absorbed. Further, the collision energy is further absorbed by the tube body 60 being broken by the tube expansion member 62 in the longitudinal direction of the tube body 60. At this time, since the groove or cut 69 formed in the tubular body 60 is spiral, the length of the formed groove or cut 69 is increased and the groove or cut 69 is formed. Since the resistance can be increased, the energy consumed and absorbed can be increased. Further, since the plurality of protrusions 67 are provided at equal intervals in the circumferential direction of the outer peripheral surface 70 of the pipe expanding member 62, the pipe expanding member 62 advances straight and stably.

  And when the pipe expansion member 62 reaches the position of the 1st fixing | fixed part 64a, the diameter D4 by the side of the other end F2 of the pipe expansion member 62 is formed thicker than the attachment hole 68 of each fixing | fixed part 64, Therefore The deformation is suppressed by fixing the first fixing portion 64a, and the progress of the tube expansion member 62 is stopped. Such a state is shown in FIG.

  Thus, when the vehicle 10 collides with the small offset, the energy applied to the side sill 24 is absorbed by the deformation of the reinforcing portion 56. Thereby, the impact applied to a passenger | crew by a small offset collision is eased, and a passenger | crew's human damage is reduced.

  Furthermore, when the pipe expansion member 62 reaches the position of the fixing portion 64, the movement of the pipe expansion member 62 is stopped, and the deformation of the tube body 60 by the pipe expansion member 62 is suppressed. Thereby, the deformation of the side sill 24 due to the small offset collision, that is, the deformation of the vehicle 10 is suppressed, and a safe space is secured in the vehicle 10. Thereby, human damage can be reduced. Since the fixing portion 64 is provided at the base portion of the front pillar 32, the deformation of the vehicle 10 on the vehicle rear side from the front pillar 32 is suppressed, the interior space of the vehicle 10 is maintained, and the occupant is protected.

  Moreover, according to the said embodiment, since the pipe body 60 is provided in the side sill 24, the rigidity of the side sill 24 with respect to a side collision can be improved.

  In addition, this invention is not restricted to the said embodiment, It can change suitably. For example, the tube body 60 may not be made of metal. Further, the cross section of the tube body 60 is not limited to a circular shape. The pipe expansion member 62 may be provided not only at the front of the vehicle 10 but also at the rear rear end E2.

  Furthermore, instead of forming a groove or a cut in the pipe body 60 by the pipe expanding member 62, a cut 71 or a groove may be formed in the pipe body 61 in advance as in the pipe body 61 shown in FIG. . The cut 71 and the groove are formed from the end of the tube body 61 along the longitudinal direction. The cut 71 or the like may be formed in a spiral.

  Even in the case where the cut line 71 and the groove are formed in the tube body 61, the tube body 61 is moved along the cut line 71 formed in the tube body 61 by the advancement of the tube expanding member 62 in the tube body 61 as in the above-described example. When the tube body 61 is deformed or broken along the groove and deformed, the collision energy is consumed and absorbed. When the cut line 71 and the groove are formed in the tube body 61, the pipe expanding member 72 does not have to have a protrusion on the outer peripheral surface 70 as shown in FIG.

  The tube expansion member is not limited to the truncated cone shape, and may have other shapes. For example, a cylindrical tubular member 73 having a diameter smaller than the diameter D4 may be provided on the side of the other end F2 of the truncated cone shape as in the tube expansion member 72 shown in FIG. Conversely, a plate-like member wider than the diameter D4 may be provided on the other end F2 side so that pressure can be received over a wide area.

  In addition, according to the present invention, the degree of impact absorption can be easily changed by changing the material, strength, plate thickness, and the like of the tube body 60. By changing the fixing position of the first fixing portion 64a, that is, the length L2, it is possible to select a position that suppresses deformation due to the small offset collision.

  By changing the taper angle of the pipe expansion member 62, the deformation of the pipe body 60 can be changed, and the degree of shock absorption can be arbitrarily set. By appropriately adjusting the total length L of the tube body 60, it can be easily applied to other vehicle types having different total lengths. Since the structure is shared, design studies, collision safety tests, etc. can be shortened. Since parts are shared, costs can be reduced.

  The present invention can be used for a side sill structure of a vehicle.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 12 ... Hood, 14 ... Front windshield glass, 16 ... Roof, 18 ... Front door, 20 ... Rear door, 22 ... Front fender panel, 24 ... Side sill, 26 ... Front wheel, 28 ... Rear wheel, 30 ... Floor , 32 ... Front pillar, 34 ... Center pillar, 36 ... Rear pillar, 38 ... Roof rail, 40 ... Car compartment, 42 ... Front door opening, 44 ... Rear door opening, 46 ... Side member, 50 ... Side sill skin, 52 ... side sill inner plate, 54 ... side sill main body part, 56 ... reinforcing part, 60, 61 ... pipe body, 62, 72 ... tube expansion member, 64 ... fixing part, 64a ... first fixing part, 64b ... second fixing part, 64c ... 3rd fixing part, 64d ... 4th fixing part, 65 ... mounting piece, 67 ... projection part, 68 ... mounting hole, 69 ... cut, 70 ... outer peripheral surface, 73 ... cylindrical member, E1 ... front end, 2 ... rear end.

Claims (8)

Side sill main body provided along the front-rear direction of the vehicle at the lower part of the side door opening of the vehicle,
Inside the side sill body part, a tube provided along the longitudinal direction of the side sill body part,
A tube expansion member provided at a longitudinal end portion of the tubular body, and deformed in the diameter expansion direction when receiving a load toward a longitudinal central portion of the tubular body. Characteristic side sill structure. The tube has an opening that opens at a longitudinal end,
The tube expansion member is provided on one end side, has an outer diameter smaller than the inner diameter of the tube body, is provided on a tip end portion inserted into the opening and the other end side, and has a diameter larger than the inner diameter of the tube body. And a side wall portion that connects the distal end portion and the enlarged portion so that the diameter gradually increases from one end side to the other end side. Side sill structure as described.   The tube expansion member protrudes radially outward from the side wall portion, and forms a groove or a cut along the longitudinal direction in the tubular body when receiving a load toward the longitudinal central portion of the tubular body. The side sill structure according to claim 2, further comprising a protrusion.   The side sill structure according to claim 3, wherein the protruding portion is formed in a spiral shape from the tip portion toward the enlarged portion.   The side sill structure according to claim 3 or 4, wherein a plurality of the protrusions are provided at equal intervals in the circumferential direction of the side wall. A fixing portion for fixing the tubular body to the side sill body portion;
The fixing portion has a mounting hole through which the tubular body is inserted,
The inner diameter of the mounting hole is smaller than the outer diameter of the enlarged portion,
The said fixing | fixed part is provided in the position which left | separated predetermined distance from the longitudinal direction edge part of the said tubular body in which the said pipe expansion member is inserted to the longitudinal direction center part side of the said tubular body. The side sill structure according to 3 or 4.   The side sill structure according to claim 6, wherein the pipe expanding member is provided at a front side end portion of the tubular body, and the fixing portion is located at a base portion of a front pillar.   The side sill structure according to claim 1 or 2, wherein a groove or a cut is formed along the longitudinal direction of the tubular body at an end portion of the tubular body where the tube expansion member is provided.

Images