Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
  • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
  • B60R19/24—Arrangements for mounting bumpers on vehicles
  • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
  • B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
  • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
  • B60R19/24—Arrangements for mounting bumpers on vehicles
  • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
  • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
  • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
  • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
  • B62D21/152—Front or rear frames
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
  • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
  • B60R19/24—Arrangements for mounting bumpers on vehicles
  • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
  • B60R2019/262—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means with means to adjust or regulate the amount of energy to be absorbed

Definitions

• the present invention relates to a crash box for a vehicle, which may be prevented from being deformed in the expansion direction in case of collision and reduce deformation against shock, thereby improving not only the durability of a bumper but also the safety of the entire vehicle.
• bumpers are mounted at front and rear parts of a vehicle for absorbing shock energy applied to a body part of the vehicle in the case of collision, thereby promoting the safety of passengers.
• a bumper includes a bumper stay coupled with a vehicle body by bolts, a bumper beam coupled with an end of the bumper stay by welding, an absorber attached to an outer surface of the bumper beam to absorb shock energy applied to the vehicle body, and a bumper cover mounted to the vehicle body to surround the absorber and exposed to the outside of the vehicle.
• a crash box is mounted between the bumper and a frame of the vehicle body to absorb shock in the case of a low speed collision, thereby minimizing damage of the vehicle.
• a prior art crash box is formed in the shape of a hollow corrugation pipe to be retracted in the case of collision to absorb shock of the collision.
• the prior art crash box as above is formed in the shape of a hollow corrugation pipe so that the shock energy is absorbed at once in the case of collision. Therefore, the crash box is apt to be crashed or generate large repulsive force, so that the vehicle may be damaged easily.
• shock-absorbing effect is weak so that a side member may be depressed or the corrugation pipe may be deformed, for example, expanded. Therefore, the durability of the entire vehicle body and the safety of passengers become weakened. Disclosure of Invention
• the present invention is derived to resolve the above and any other disadvantages of the prior art. [9] According to the present invention, there is an object to provide a crash box for a vehicle, in which a deformation-pre venting element is mounted in the crash box to prevent deformation of the crash box in the expansion direction for dispersing and reducing shock energy more effectively in the case of collision.
• a crash box for a vehicle includes a crash box element mounted between a back beam and a side member for absorbing shock in the case of collision and formed in the shape of a hollow corrugation pipe with repeated peaks and valleys; and an expansion-preventing reinforcement corrugation pipe fitted in the crash box element and formed in the shape of a corrugation pipe with peaks and valleys symmetrically with the crash box element, so that the valleys and peaks are fixedly joined with each other.
• the expansion-preventing reinforcement corrugation pipe in the symmetrical shape with the crash box element is joined between the valleys in the crash box element, so that the crash box element may be prevented from being deformed and damaged in the expansion direction in the case of impact.
• the collision energy applied to the crash box element is dispersed and relieved by the expansion-preventing reinforcement corrugation pipe together with the crash box element, so that the entire durability and the safety of the vehicle may be improved.
• the crash box not onl y absorbs the shock energy applied to the crash box but also is prevented from being deformed largely in the expansion direction via the relatively simple structure.
• a plate is mounted between the side member and the crash box element for preventing the deformation of the side member.
• FIG. 1 is an exploded perspective view showing a structure of a vehicle in which a crash box according to the present invention is mounted;
• FIG. 2 is a perspective view showing a structure of the crash box for a vehicle according to the present invention, in which an expansion-preventing reinforcement corrugation pipe is mounted in a crash box element;
• FIG. 3 is a perspective view showing the crash box for a vehicle according to the present invention, in which tapered parts are formed at corners of the crash box element;
• FIG. 4 is an expanded sectional view showing principal parts of the crash box for a vehicle according to the present invention, in which the expansion-preventing reinforcement corrugation pipe is mounted between valleys of the crash box element in the crash box element and a plate is mounted at a rear part of the crash box element;
• FIG. 5 is an expanded sectional view showing principal parts of the crash box for a vehicle according to the present invention, in which an auxiliary expansion-preventing corrugation pipe is mounted in the expansion-preventing reinforcement corrugation pipe, which is mounted in the crash box element;
• FIG. 6 is an expanded sectional view showing principal parts of a prior art crash box
• FIG. 7 shows numerical graphs respectively indicating impact change in a collision test carried out for the crash box of the present invention and the prior art crash box;
• FIG. 8 shows numerical graphs respectively indicating load change curves in the collision test carried out for the crash box of the present invention and the prior art crash box.
• FIG. 1 is an exploded perspective view showing a structure of a vehicle employing a crash box according to a preferred embodiment of the present invention.
• FIG. 2 is a perspective view showing a structure of the crash box for a vehicle according the present invention, in which an expansion-preventing reinforcement corrugation pipe is mounted between valleys of a crash box element in the crash box element, wherein the expansion-preventing reinforcement corrugation pipe is in the symmetrical shape with the crash box element.
• FIG. 3 is a perspective view showing the crash box for a vehicle, in which tapered parts are formed at corners of the crash box element.
• Fig. 4 is an expanded sectional view showing principal parts of the crash box for a vehicle according to the present invention, in which the expansion-preventing reinforcement corrugation pipe is mounted between valleys of the crash box element in the crash box element and the expansion-preventing reinforcement corrugation pipe is in the same shape with the crash box element.
• FIG. 5 is an expanded sectional view showing principal parts of the crash box for a vehicle according to the present invention, in which an auxiliary expansion-preventing corrugation pipe is mounted in expansion-preventing reinforcement corrugation pipe, which is mounted in the crash box element.
• Fig. 6 is an expanded sectional view showing principal parts of a prior art crash box.
• Fig. 7 and Fig. 8 show numerical graphs respectively indicating impact change amounts and load change curves of the crash box of the present invention and a prior art crash box in collision tests;
• a crash box element 20 is mounted with an expansion-preventing reinforcement corrugation pipe 50 inside so that the crash box element 20 is prevented from being deformed and damaged in the expansion direction in the case of collision, wherein the expansion-preventing reinforcement corrugation pipe 50 is formed in the symmetrical shape with the crash box element 20 with the same pitch between valleys 22 of the crash box element 20. Further, the expansion-preventing reinforcement corrugation pipe 50 may relieve and absorb the collision energy.
• the crash box element 20 is formed of steel in the shape of a hollow corrugation pipe with peaks 21 and valleys 22 repeated by a uniform pitch, and mounted between a back beam and a side member.
• the crash box element 20 is mounted with the expansion-preventing reinforcement corrugation pipe 50 inside, wherein the expansion-preventing reinforcement corrugation pipe 50 is formed symmetrically with the crash box element 20 and has repeatedly formed valleys 52 and peaks 51, which are respectively joined between valleys 22 of the crash box element 20.
• the expansion-preventing reinforcement corrugation pipe 50 is formed of engineer plastic and nylon resin materials having high strength, wherein the peaks 51 and the valleys 52 are formed repeatedly in the symmetric direction with those of the crash box element 20.
• a pitch between the peaks 21 and the valleys 22 of the crash box element 20 and a pitch between the peaks 51 and the valleys 52 of the expansion- preventing reinforcement corrugation pipe 50 are formed equally and the peaks 51 of the expansion-preventing reinforcement corrugation pipe 50 contact the valleys 22 of the crash box element 20, so that an adhesive agent is filled between the peaks 51 and the valleys 22 to adhere them together.
• the expansion-preventing reinforcement corrugation pipe 50 prevents the crash box element 20 from being cracked and spread in the expansion direction when the crash box element 20 is deformed in the corrugation direction by collision. Further, the expansion-preventing reinforcement corrugation pipe 50 absorbs the shock energy together with the crash box element 20 to increase shock-absorbing effect.
• Fig. 7 shows graphs respectively indicating the change of impact. Referring to Fig.
• curve A shows the change of impact when the expansion-preventing reinforcement corrugation pipe 50 is mounted in the crash box element 20 and curve B shows the change of impact when the expansion-preventing reinforcement corrugation pipe 50 is not mounted in the crash box element 20, wherein curve A shows that the shock is noticeably reduced and stabilized rather than curve B.
• Fig. 8 shows load change curves. Referring to Fig. 8, curve A shows that the load change curve when the expansion-preventing reinforcement corrugation pipe 50 is mounted in the crash box element 20 and curve B shows the load change curve when the expansion-preventing reinforcement corrugation pipe 50 is not mounted in the crash box element 20, wherein curve A shows that the change of load is noticeably reduced and stabilized rather than curve B.
• the crash box element 20 is formed with tapered parts 23 at corners for improving machining properties thereof.
• an auxiliary expansion-preventing corrugation pipe 55 may be further mounted in the expansion-preventing reinforcement corrugation pipe 50, which is mounted in the crash box element 20.
• the auxiliary expansion-preventing corrugation pipe 55 is formed in the symmetrical sectional shape with the expansion-preventing reinforcement corrugation pipe 50 and adhered to the expansion-preventing reinforcement corrugation pipe 50 by using the adhesive agent as described above while peaks of the auxiliary expansion- preventing corrugation pipe 55 contact the valleys 52 of the expansion-preventing reinforcement corrugation pipe 50.
• the auxiliary expansion-preventing corrugation pipe 55 restrains the large deformation of the crash box element 20 in the expansion direction more stably in the case of collision, thereby further improving the shock absorbing performance.
• the crash box element 20 in the triple structure with the expansion- preventing reinforcement corrugation pipe 50 and the auxiliary expansion-preventing corrugation pipe 55 mounted in the crash box element 20 prevents the deformation in the expansion direction and maximizes the shock absorbing performance.
• a reinforcement plate 40 is further mounted between the crash box element 20 and the side member 12 as shown in Fig. 4 and Fig. 5, so that a distal end of the crash box element 20 and a front end of the side member 12 may be prevented from being deformed in the expansion direction.
• the reinforcement plate 40 is positioned between the crash box element 20 and the side member 12 and coupled with them by means of bolts and nuts.
• the crash box element 20 according to the present invention as described hereinabove may prevent the deformation of peripheral parts and improve the durability and the safety of not only the crash box element 20 itself but also the entire vehicle body.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Vibration Dampers (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=39410587

Family Applications (1)

Country Status (2)

Families Citing this family (4)

Citations (3)

Family Cites Families (2)

• 2007
  • 2007-03-07 KR KR1020070022610A patent/KR100813158B1/ko not_active IP Right Cessation
• 2008
  • 2008-03-07 WO PCT/KR2008/001302 patent/WO2008108597A1/en active Application Filing

Patent Citations (3)

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