TWI607904B - Collision collapsing energy-absorbing structure applied to vehicles - Google Patents

Description

Impact collapse energy absorption structure applied to vehicles

The present invention relates to a collision and collapse energy absorbing structure applied to a vehicle, and more particularly to a deformation direction guiding shaft disposed in an energy absorbing structure to guide a deformation direction of the energy absorbing structure, so as to cause collision and collapse energy absorption. The structure exerts the maximum energy absorption effect.

The bumper system of the vehicle is mainly used to absorb the impact force in the event of a collision and to protect the vehicle body in the event of a low speed impact on the structural damage. In addition, the bumper is also useful for protecting the walker when it collides with a motor vehicle. The bumper typically includes a rigid bumper beam that is mounted across the front and rear of the vehicle and connected to the left and right side rails, respectively, by a crash box structure. The energy generated during the impact event enters the crash box through the bumper beam and is converted into deformation work, so that the damage and damage can be significantly reduced.

Please refer to Figure 1 and Figure 2. U.S. Patent No. 20110291431 discloses a crash box 10 mounted between a bumper beam and a side rail of a vehicle, the overall energy absorbing structure being composed of two U-shaped walls (11, 12) with their pins (111, 121) overlaps and joins into a pyramid-shaped case. However, as shown in FIG. 2, when the above-mentioned collision energy absorbing structure fails to ensure the impact force P from the opposite side, the energy absorbing structure can maintain the collapse in the axial direction to maintain a better suction. Can work. When the collision energy absorbing box is subjected to a large lateral component, when the entire collision energy absorbing box is formed into a curved state, the designed deformation energy absorption protection body capability is greatly reduced.

The object of the present invention is to provide a built-in collapse direction in a collapse energy absorbing structure. The guiding shaft applies the multi-stage collapse characteristic of the crushing direction guiding shaft, and guides the crushing direction of the collapsed energy absorbing tube body back to the collision and collapse energy absorbing structure of the central axis of the pipe body.

In order to achieve the above-mentioned collision and collapse energy absorbing structure, the present invention discloses a collision and collapse energy absorbing structure connected between a force receiving member and a pedestal, and the structure thereof comprises: a tube body and a crushing direction guiding shaft. The tube body has a first end portion and a second end portion, the first end portion is connected to the force receiving member, and the second end is connected to the base, and the tube near the first end portion The rigidity of the body is smaller than the rigidity of the pipe body near the second end portion; the crushing direction guide shaft is axially disposed in the pipe body, and has a plurality of shafts of different outer diameters in order from small to large The rods are assembled with each other, each shaft is inserted into the concentric inner diameter of the adjacent larger shaft, and the shaft with the smallest outer diameter is connected to the shaft with the largest outer diameter. Attached to the base, the adjacent shafts have a joint rigidity between them to maintain the assembled state of the tension between the two shafts, the joint rigidity being greater than the rigidity of the pipe body on the same cross section.

In an embodiment, the crushing direction guiding shaft is axially disposed on a central axis of the tubular body.

In an embodiment, the joint rigidity between each set of shafts of the crushing direction guiding shaft is sequentially increased from the outer diameter of the smaller shaft to the outer diameter of the larger shaft, and the rigidity of the tube is determined by the The first end to the second end are sequentially incremented.

As described above, the features of the present invention include: the surface tube body of the collision collapse energy absorbing structure of the present invention and the central axis position thereof are further provided with a rigidity which is relatively rigid and can be controlled from small to large, and the direction of the collapse is guided. Guide the shaft to the axial crushing direction to ensure that the collision collapse energy absorbing box can maintain the deformation in the axial direction, so as to facilitate the performance of the original collapse energy absorbing structure, while maintaining a large absorption force. The role.

10‧‧‧ Collision energy box

11,12‧‧‧ wall

111,121‧‧‧ pins

20,20’‧‧‧ Collision collapse energy absorption structure

21,21’‧‧‧ body

211‧‧‧ first end

212‧‧‧second end

213‧‧‧ center axis

22‧‧‧crush direction guide shaft

221, 221a, 221b, 221c‧‧‧ shaft

222,223‧‧‧ end face

A‧‧‧ force parts

B‧‧‧Base

F, P‧‧‧ biased side impact force

1 is a perspective view of a crash box structure of a prior art; FIG. 2 is a schematic view of a structure of a prior art crash box structure subjected to a biased side impact force; FIG. 3 is a perspective view of a collision collapse energy absorbing structure applied to a vehicle of the present invention; 4 is a perspective view of an embodiment of a collision and collapse energy absorbing structure applied to a vehicle of the present invention applied to a bumper; FIG. 5 is a schematic structural view of a collision and collapse energy absorbing structure applied to a vehicle before compression according to the present invention; FIG. 6 is a structural schematic view of the impact collapse energy absorbing structure applied to the vehicle after the biased side impact force of the vehicle is pressed and pressed.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, in which FIG. The components shown are not drawn in the number, shape, size ratio, etc. at the time of implementation, and the actual size of the implementation is a selective design, and the component layout form may be more complicated.

First, please refer to Figure 3. The collision and collapse energy absorbing structure 20 of the present embodiment is mainly applied to the structure for absorbing the impact force after the collision of the vehicle, and is disposed between the force receiving member A and a base B, and the structure thereof comprises: the tube body 21 and the collapse The direction guiding shaft 22; the tube body 21 (the tube body may be in the shape of a round tube, a square tube or a cone tube), and has a first end portion 211 and a second end portion 212, the first end portion 211 is Connected to the force receiving member A, the second end portion 212 is connected to the base B, and the rigidity of the tubular body 21 near the first end portion 211 is smaller than the rigidity of the tubular body 21 near the second end portion 212 (further In an embodiment, the rigidity of the tubular body 21 may be sequentially increased from the first end portion 211 to the second end portion 212, but not limited thereto; the crushing direction guiding shaft 22 The shaft body is axially disposed in the tubular body 21, and has a plurality of shafts 221 of different outer diameters which are sequentially small and large, and are assembled with each other (for example, 221a, 221b, 221c of the embodiment), each shaft The rod 221 is inserted into the adjacent larger shaft 221 The end surface 222 of the shaft 221a having the smallest outer diameter is connected to the force receiving member A, and the end surface 223 of the shaft 221c having the largest outer diameter is connected to the base B, and the adjacent shafts The rods have a joint rigidity between them to maintain an assembled state between the two shafts 221 (such as between the shaft 221a and the shaft 221b, the shaft 221b and the shaft 221c), and the joint rigidity is greater than the same section The rigidity of the tubular body 21.

In the above embodiment, the force receiving member A is one end that generates displacement and applies a collision force or pressure to the tube body 21, and the base B is a fixed end.

In an embodiment, the crushing direction guiding shaft 22 may be one or more, and at least one crushing direction guiding shaft 22 is axially disposed on the central axis 213 of the tubular body 21.

In one embodiment, the length of each of the shafts 221 of the crush direction guide shaft 22 is the same; and the assembly structure between each set of shafts 221 includes welding or gluing; the joint rigidity between each set of shafts 221 It can be set to be substantially the same, and the joint rigidity between each set of shafts 221 can also be set from the outer diameter of the smaller shaft 221 to the outer diameter of the larger shaft 221 in order.

In addition, the force receiving member A is fixed on the bumper, and the base B is fixed on the vehicle beam, or please refer to FIG. 4 again. In the embodiment of FIG. 4, the collision collapse energy absorbing structure 20' The tubular body 21' is a square tube, the force receiving member A is a bumper, and the base B is a vehicle beam.

As shown in FIG. 5 and FIG. 6, it is a schematic structural view of the collision collapse energy absorbing structure 20 of the present invention before and after compression. According to the collision collapse energy absorbing structure 20 of the present invention, when the force receiving member A receives a biasing side impact force F, the less rigid tubular body 21 adjacent to the force receiving member A is deflected from the central axis 213. Deformation (as shown in FIG. 6), at this time, the shaft 211a of the central body 213 of the tubular body 21 which is more rigid than the tubular body 21 simultaneously receives the deflecting side impact force F, and when the deflecting side impact force F is greater than the shaft After the joint rigidity between the 211a and the shaft 211b is reached, the shaft 211a is crushed with the force receiving member A toward the inner diameter of the shaft of the shaft 211b, so as to guide the crushing direction of the tubular body 21 back to it as much as possible. The axial direction of the tubular body 21, if the biasing side impact force F has not been eliminated and continues to be utilized The tubular body 21 of the segment, and the shaft 211b of the second stage and the shaft 211c operate on the same principle, so that the collapse direction of the collision collapse energy absorbing structure 20 is kept parallel to the central axis 213, or as small as possible. In order to make the collision collapse energy absorbing structure 20 exhibit the maximum absorption impact capability expected from the design.

In summary, the embodiments or examples of the technical means employed in the foregoing are not intended to limit the scope of the invention. That is, the equivalent changes and modifications made in accordance with the scope of the patent application of the present invention or the scope of the invention are covered by the scope of the invention.

20‧‧‧ Collision collapse energy absorption structure

21‧‧‧ tube body

211‧‧‧ first end

212‧‧‧second end

213‧‧‧ center axis

22‧‧‧crush direction guide shaft

221, 221a, 221b, 221c‧‧‧ shaft

222,223‧‧‧ end face

A‧‧‧ force parts

B‧‧‧Base

Claims (10)

A collapsing and absorbing structure for a vehicle is connected between a force receiving member and a base, and the structure comprises: a tube body having a first end portion and a second end portion, the first portion One end is connected to the force receiving member, the second end portion is connected to the base, the rigidity of the pipe body near the first end portion is smaller than the rigidity of the pipe body near the second end portion; and at least one collapse a retracting guide shaft, which is axially disposed in the tube body, and has a plurality of shaft rods of different outer diameters which are sequentially small and large, and each shaft rod is inserted and adjacent to each other. The shaft having the smallest outer diameter is connected to the force receiving member, and the shaft having the largest outer diameter is connected to the base, and the adjacent shaft has a The joint rigidity is maintained to maintain the assembled state of the stretching between the two shafts, which is greater than the rigidity of the tubular body on the same cross section. The impact collapse energy absorbing structure applied to the vehicle according to claim 1, wherein at least one crushing direction guiding shaft is axially disposed on a central axis of the tubular body. The collision-crushing energy absorbing structure applied to a vehicle according to claim 1, wherein the length of each of the shafts of the crushing direction guide shaft is the same. The impact collapse energy absorbing structure applied to the vehicle according to claim 1, wherein the joint rigidity between each set of the shafts of the crush direction guide shaft is substantially the same. The impact collapse energy absorbing structure applied to a vehicle according to claim 4, wherein the assembly structure between each set of shafts comprises welding or gluing. The impact collapse energy absorbing structure applied to the vehicle according to claim 1, wherein the joint rigidity between each set of the shafts of the crush direction guide shaft is from the outer diameter of the smaller shaft to the larger The outer diameter of the shaft is sequentially increased. The impact collapse energy absorbing structure applied to the vehicle according to claim 1, wherein the rigidity of the pipe body is sequentially increased from the first end portion to the second end portion. The impact collapse energy absorbing structure applied to a vehicle according to claim 1, wherein the pipe body is a round pipe, a square pipe or a tapered pipe. The collision-crushing energy absorbing structure applied to a vehicle according to the first aspect of the invention, wherein the force-receiving member is fixed to the bumper or the force-receiving member is a bumper. The crash-crushing energy absorbing structure applied to a vehicle according to the first or seventh aspect of the invention, wherein the base is fixed to the vehicle beam or the base is a vehicle beam.