CN201224371Y - Energy-absorbing type vehicle bumper - Google Patents

Abstract

The utility model discloses an energy-absorbing vehicle bumper used on a running vehicle, which consists of a bumper panel (1), a guide support device (2), a buffer energy absorber assembly (8) and a bumper beam ( 12) constitutes; the guide support device (2), one end of which is connected to the bumper beam (12) through bolts, and the other end is connected to the frame longitudinal beam (4) through bolts; the buffer energy absorber assembly (8), whose One end links to each other with bumper crossbeam (12) with bolt by bumper connecting plate, and its other end is connected with vehicle frame longitudinal beam (4) with bolts through angle steel longitudinal beam connecting plate (7). The utility model has the advantages of compact structure, small structure size, safety and reliability, buffers and absorbs energy through gas and hydraulic oil, and has high energy absorption efficiency; changing the initial state of the gas can change the dynamic stiffness of the buffer energy absorber assembly (8) ; During the buffering process, the flow area changes with the buffering process, and a relatively satisfactory buffering energy absorption effect can be obtained.

Description

Energy-absorbing vehicle bumper

technical field

The utility model relates to an energy-absorbing vehicle bumper used on a running vehicle, which plays a buffering role and is mainly used for vehicle frontal collisions.

Background technique

Automobiles are currently the main means of transportation on land, and the death toll caused by automobile traffic accidents accounts for the first place in the death toll of various accidents. Therefore, the problem of automobile collision safety has attracted more and more attention, and in the course of automobile collision, the most likely occurrence is the collision of the front of the automobile, which at first involves the collision of the front bumper. As a safety protection device, the bumper is an important part of the modern automobile structure, which can effectively reduce the degree of casualties and the degree of damage to the car. But at present, most of the bumpers equipped in many domestic cars are ordinary energy-absorbing types. Their common disadvantage is that they can only be used in low-speed driving conditions, and their energy-absorbing performance is poor. Therefore, the equipment on the car has good energy-absorbing characteristics. The bumper, so that the car can fully absorb the collision energy in the event of a collision, reduce the damage to the car and the injury to the people in the car, which is of great significance for improving the safety of the car's collision.

Contents of the invention

The technical problem to be solved by the utility model is: to provide a new type of energy-absorbing vehicle bumper, which can fully absorb the collision energy of the vehicle when the vehicle collides, thereby effectively reducing the degree of damage to the vehicle and the degree of casualties.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: it is composed of a bumper panel, a guide support device, a buffer energy absorber assembly and a bumper beam, wherein one end of the guide support device is connected with the bumper beam through a bolt, and the buffer One end of the energy absorber assembly is connected to the bumper beam with bolts through the bumper connecting plate, the other end of the guide support device is connected to the longitudinal beam of the frame through bolts, and the other end of the energy absorber assembly is connected through the angle steel longitudinal beam The plates are bolted to the longitudinal beams of the frame.

Compared with the prior art, the energy-absorbing vehicle bumper provided by the utility model has the following main advantages:

The structure is compact, safe and reliable, and two-stage throttle holes are designed on the throttle mandrel of the buffer energy absorber. The gas and hydraulic oil in the buffer energy absorber assembly of the bumper buffer and absorb energy, and the energy absorption efficiency is high. The structure makes full use of the compressibility of the gas medium as the return spring. Due to the nonlinearity of the gas spring, the buffer energy absorber rebounds smoothly. Since the energy storage capacity per unit volume of gas is much greater than that of mechanical springs, its structural size is smaller than that of metal springs. In addition, changing the initial state of the gas can change the dynamic stiffness of the buffer. This design of the orifice can realize variable throttling. During the buffering process, the flow area changes with the buffering process. The buffering pressure in the buffering chamber Maintaining uniformity or changing according to a certain rule can achieve a satisfactory buffering and energy-absorbing effect.

Description of drawings

Fig. 1 is the structure of the present utility model and the schematic diagram that is contained on the vehicle frame longitudinal beam 4.

Fig. 2 is a view along the direction A of Fig. 1 .

Fig. 3 is a C-C arrow view of Fig. 1 .

Fig. 4 is a view taken along direction B of Fig. 1 .

FIG. 5 is a schematic structural view of the energy absorber assembly 8 .

FIG. 6 is a schematic structural view of the guide support device 2 .

In the figure: 1. Bumper panel; 2. Guide support device; 3. Welding parts; 4. Frame longitudinal beam; 5. Bolts; Assembly; 9. Connecting bolts; 10. Bumper connecting plate; 11. Snap fasteners; 12. Bumper beam; 13. Hydraulic oil; 14. Floating piston; 15. Nitrogen; 16. Piston rod; 17. Tightening 18. Hydraulic cylinder; 19. Seal ring; 20. Throttle mandrel; 21. Primary throttle hole; 22. Secondary throttle hole; 23. Screw hole; 24. Sliding groove.

Detailed ways

Below in conjunction with example and accompanying drawing, the utility model is further described.

The structure of the energy-absorbing vehicle bumper provided by the utility model is shown in FIGS. Since the mass of the bumper beam 12 is relatively large, the guide support device 2 and the energy absorber assembly 8 are used for joint support, and the guide support device 2 and the energy absorber assembly 8 can be jointly supported when the vehicle collides. function to absorb the energy of impact. Wherein: one end of the guide support device 2 is connected with the bumper beam 12 through a bolt, and the other end of the guide support device 2 is connected with the vehicle frame longitudinal beam 4 through a connecting bolt 9 . One end of the energy absorber assembly 8 is connected to the bumper beam 12 through the bumper connecting plate with bolts, and the other end of the energy absorber assembly 8 is connected to the frame longitudinal beam 4 through the angle steel longitudinal beam connecting plate 7 with bolts 5 . The angle steel longitudinal beam connecting plate 7 is provided with reinforcing ribs 6 to enhance the rigidity of the angle steel longitudinal beam connecting plate 7 .

The guide support device 2 is a channel-shaped steel structure similar to a vehicle frame, and a sliding groove 24 for installing the connecting bolt 9 is opened in the middle of the connecting part of the guide support device 2 and the vehicle frame longitudinal beam 4. The guide support device 2 It is connected with the vehicle frame longitudinal beam 12 through screw holes 23 . When a collision occurs, the guide support device 2 can slide relative to the frame longitudinal beam 4 along the connecting bolts 9 (see FIG. 6 ), buffering and absorbing part of the energy.

Described buffer energy absorber assembly 8, its structure as shown in Figure 5: be provided with piston rod 16, this piston rod is hollow structure, its front end is connected with bumper beam 12 by bolt and bumper connector 10 (see Fig. 3); Be provided with floating piston 14 and throttling mandrel 20, floating piston 14 is positioned at the inner cavity of piston rod 16, and this piston separates the inner cavity of piston rod 16 into left and right two cavities, and is contained in floating The sealing ring 19 on the piston 14 is sealed, the left cavity is filled with nitrogen gas 15 , and the right cavity is filled with hydraulic oil 13 ; the throttle mandrel 20 is located in the inner cavity of the hydraulic cylinder 18 . The outer cylindrical surface of the piston rod 16 is slidingly matched with the inner cylindrical surface of the hydraulic cylinder 18 . The hydraulic cylinder 18 is connected with the weldment 3 of the vehicle frame longitudinal beam 4 through fastening bolts 17 (see FIG. 1 ).

The throttling mandrel 20 is provided with two stages of throttling holes, that is, a primary throttling hole 21 and a secondary throttling hole 22 (see FIG. 5 ). The hydraulic oil in the hydraulic cylinder 18 communicates with the right cavity of the piston rod 16 through the primary orifice 21 and the secondary orifice 22, forming a channel for hydraulic oil.

The design forms of the first-stage orifice 21 and the second-stage orifice 22 can realize variable throttling. During the buffering process, the flow area changes with the buffering process, and the buffering pressure in the buffering chamber remains uniform or at a certain level. changes in the law. The initial state of the gas can be changed, so as to change the dynamic stiffness of the energy absorber assembly 8 .

The buffer energy absorber assembly 8 can be arranged according to the position of the vehicle frame longitudinal beam 4 .

The cross-section of the bumper beam 12 is groove-shaped, and the bumper panel 1 is embedded in the groove of the bumper beam 12 and connected by snap fasteners 11 (see FIGS. 2 and 4 ).

Briefly describe the working principle of the present utility model below (with reference to Fig. 5):

Impact process: When the car collides with an obstacle, the impact force on the bumper is first transmitted to the piston rod 16, and the end of the piston rod moves to the right to squeeze the hydraulic oil 13. At this time, the oil in the oil chamber of the hydraulic cylinder The pressure rises sharply under the action of the external force of the piston rod, and the hydraulic oil flows to the inner cavity of the piston rod 16 through the primary orifice 21 and the secondary orifice 22, pushing the floating piston 14 to move to the left, and making the nitrogen gas 15 Compression, at this time the gas also plays a role in buffering the impact energy. The impact load is quickly reduced under the action of the buffer energy absorber assembly 8, so that the energy of the impact is absorbed by the viscous resistance and gas compression when the hydraulic oil passes through the orifice. Due to the throttling effect of the oil, most of the kinetic energy of the impactor is converted into the heat energy of the oil, which is dissipated by the air.

Rebound process: the energy-absorbing buffer assembly 8 can move relative to the vehicle frame along the guide support device 2 during the collision, so as to further relieve the energy of the collision. After the impact, the nitrogen in the piston rod 16 cavity generates restoring power, and the floating piston 14 is pushed to the right to reset the bumper.

Claims (6)

1. endergonic vehicle bumper, by bumper fascia (1), guiding support device (2), buffering energy-absorbing device assembly (8) and bumper beam (12) constitute, an end that it is characterized in that guiding support device (2) links to each other with bumper beam (12) by bolt, one end of buffering energy-absorbing device assembly (8) links to each other with bumper beam (12) with bolt by bumper/spoiler connecting panel (10), the other end of guiding support device (2) is connected with chassis side rail (4) by bolt, and the other end of buffering energy-absorbing device assembly (8) is connected with chassis side rail (4) with bolt by angle steel longeron connecting panel (7).

2. endergonic vehicle bumper as claimed in claim 1 is characterized in that: at be connected with chassis side rail (4) middle part of part of guiding support device (2), have a sliding tray (24) that tie bolt (9) is installed.

3. endergonic vehicle bumper as claimed in claim 1, the structure that it is characterized in that buffering energy-absorbing device assembly (8) is: be provided with piston rod (16), this piston rod is a hollow structure, and its front end is connected with bumper beam (12) with bumper/spoiler connecting panel (10) by bolt; Be provided with floating piston (14) and throttling plug (20), floating piston (14) is arranged in the inner chamber of piston rod (16), and throttling plug (20) is hollow structure and the inner chamber that is arranged in hydraulic actuating cylinder (18); Piston rod (16) external cylindrical surface and hydraulic actuating cylinder (18) inner cylinder face bearing fit.

4. endergonic vehicle bumper as claimed in claim 3 is characterized in that throttling plug (20) is provided with one-level cutoff port (21) and two-step throttle hole (22).

5. as claim 3 or 4 described endergonic vehicle bumpers, it is characterized in that floating piston (14) is divided into left and right two chambeies with the inner chamber of piston rod (16), left chamber is full of nitrogen (15), and right chamber is full of hydraulic oil (13); Hydraulic oil (13) in the hydraulic actuating cylinder (18) communicates with the right chamber of piston rod (16) by one-level cutoff port (21) and two-step throttle hole (22).

6. endergonic vehicle bumper as claimed in claim 1, the cross section that it is characterized in that bumper beam (12) is a grooved.

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