TWI694935B - Bumper buffer device and vehicle - Google Patents

Abstract

A bumper buffer device is adapted to assemble on a vehicle beam including an upper end and a lower end. The bumper buffer device includes a fixed frame fixed to the upper end. The bumper assembly includes a bumper body, a rotary shaft connected with the bumper body, a connecting member for temporarily fixing the rotating shaft to the fixed frame and an elastic member whose one end is connected to the bumper body and the other end is connected to the lower end of the beam assembly. When the bumper body is crashed, the connecting member is broken so as to release the fixed relationship between the rotating shaft and the fixing frame, and the bumper assembly rotates relative to fixed frame along the rotating shaft, and the elastic element is pressed by the bumper body to accumulate elastic potential energy. The elastic element is adapted to release the elastic potential energy so that the bumper is back to original positon. A vehicle having the bumper buffer device is provided.

Description

Bumper buffer device and vehicle

The invention relates to a buffer device and a vehicle, and particularly relates to a bumper buffer device and a vehicle.

Generally speaking, according to statistics, when a traffic accident occurs, the probability of being hit in front of the vehicle is relatively high. In consideration of safety, a generally commercially available vehicle will be provided with a bumper on the beam (front longitudinal beam) in front of the vehicle body, and an energy absorbing box is provided between the bumper and the front longitudinal beam. The bumper is usually set at the outermost side to bear the initial slight collision, and for a large impact, the energy absorption box will absorb the collision energy. That is to say, the current vehicle uses the bumper and the energy-absorbing box to reduce the probability of the cockpit deforming when impacted, so as to ensure the living space of the people in the vehicle. However, this design will increase the weight of the car body. On the other hand, in the event of a collision, the bumper and the energy absorption box will be damaged, so it is usually necessary to replace the entire set of bumper and energy absorption box during maintenance.

With the rising awareness of environmental protection, metropolitan electric vehicles are currently a global development trend. For the performance of general electric vehicles, the structure of the car body tends to be simple and light. The above energy-absorbing box has the disadvantage of heavy weight, and is not suitable for use in simple and lightweight car models such as golf carts, amusement park cars, and miniature electric cars. But this type of car Often there is only a short body, and it is not possible to set up an energy absorption box like a car to absorb impact energy or to protect it with a hard steel plate. Therefore, there is a lack of a buffer structure when an impact accident occurs, and the safety of drivers and passengers is obviously insufficient. In addition, there are currently no strict requirements for collision safety of electric vehicle structures in the world. According to the conventional electric vehicle body structure, when an impact accident occurs, the collision safety of a simple and lightweight small electric vehicle is obviously insufficient.

The invention provides a bumper buffer device, which has the functions of absorbing and buffering impact energy and recoverable characteristics, and can be applied to general vehicles and electric vehicles.

The present invention provides a vehicle having the bumper buffer device described above.

The bumper buffer device of the present invention is suitable for being arranged on a beam assembly of a vehicle, wherein the beam assembly includes opposite upper ends and lower ends. The bumper buffer device includes a fixed frame, a bumper assembly, an engaging member and an elastic member. The fixing frame is adapted to be fixed to the upper end of the girder assembly. The bumper assembly includes a bumper body and a rotating shaft connected to the bumper body. The rotating shaft is pivotally connected to the fixed frame, the joint is connected to the rotating shaft and the fixed frame, and the rotating shaft is temporarily fixed to the fixed frame. One end of the elastic member is connected to the bumper body and the other end is adapted to be connected to the lower end of the beam assembly. When the bumper body is impacted, the joint will be destroyed and the fixed relationship between the rotating shaft and the fixed frame will be released. At this time, the bumper assembly is adapted to use the rotating shaft as the axis and rotate relative to the fixed frame. The elastic piece accumulates an elastic potential energy due to being pressed by the body of the bumper.

In an embodiment of the invention, the above bumper assembly further includes two connecting rods. The safety rod and the rotating shaft are parallel and connected by two connecting rods, and form a line-shaped structure together.

In an embodiment of the present invention, the above-mentioned joint includes solder, and is disposed at a partial boundary between the rotating shaft and the fixed frame.

In an embodiment of the present invention, the above-mentioned elastic member includes an arc-shaped elastic arm, a spring, and a torsion spring.

A vehicle of the present invention includes a large beam assembly and at least one bumper buffer device. The girder assembly includes an opposite upper end and a lower end. The bumper buffer device includes a fixed frame, a bumper assembly, an engaging member and an elastic member. The fixing frame is adapted to be fixed to the upper end of the girder assembly. The bumper assembly includes a bumper body and a rotating shaft connected to the bumper body. The rotating shaft is pivotally connected to the fixed frame, the joint is connected to the rotating shaft and the fixed frame, and the rotating shaft is temporarily fixed to the fixed frame. One end of the elastic member is connected to the bumper body and the other end is adapted to be connected to the lower end of the beam assembly. When the bumper body is impacted, the joint will be destroyed and the fixed relationship between the rotating shaft and the fixed frame will be released. At this time, the bumper assembly is adapted to use the rotating shaft as the axis and rotate relative to the fixed frame. The elastic piece accumulates an elastic potential energy due to being pressed by the body of the bumper.

In an embodiment of the present invention, the above-mentioned beam assembly has opposite front and rear sections, at least one bumper device is one, and bumper buffer devices are arranged in the front section and the rear section One of the segments.

Based on the above, the bumper buffer device of the vehicle of the present invention is configured with a bumper assembly having a rotating shaft, and the rotating shaft is temporarily fixed to the fixed frame through the joint member, so that the bumper body can maintain its position when it has not been hit. The bumper body is connected to the beam assembly through an elastic piece. When the bumper body is impacted, the joint will be destroyed and the fixed relationship between the rotating shaft and the fixed frame will be released. At this time, the bumper assembly is adapted to use the rotating shaft as the axis and rotate relative to the fixed frame. The elastic piece is compressed by the body of the bumper to accumulate an elastic potential energy. After the impact occurs, the elastic piece is suitable for releasing the elastic potential energy to restore the body of the bumper to its original position. In other words, the bumper buffer device of the vehicle of the present invention uses the physical characteristics of the elastic member to convert the impact energy into elastic potential energy, as long as the impact force does not exceed the strength that will permanently destroy the structure of the elastic member. All the pieces can release the elastic potential energy and recover after the impact, and the body of the bumper can be restored to the original position correspondingly. In this way, when repairing the bumper assembly, it is only necessary to reconfigure the engaging member to temporarily fix the rotating shaft to the fixed frame, and there is no need to replace the entire set of bumper assemblies, which reduces the maintenance cost and improves the convenience of maintenance.

F: impact force

100, 100’: Vehicle

110: beam assembly

112: Upper beam

114: lower beam

116: connecting beam

200: bumper buffer

210: fixed frame

212: Joint

220: elastic piece

230: bumper assembly

232: bumper body

234: shaft

236: connecting rod

FIG. 1 is a schematic side view of a vehicle according to an embodiment of the invention.

Fig. 2 is a bottom view of the vehicle of Fig. 1.

3 is a partial schematic view of the bumper buffer device of the vehicle of FIG. 1.

4 is a schematic view of another bumper buffer device of FIG. 3 from another perspective.

5 is a partial enlarged view of the rotating shaft and the fixed frame of the bumper buffer device of FIG. 3.

6 is a schematic partial side view of the vehicle of FIG. 1 before being impacted.

7 is a schematic partial side view of the vehicle of FIG. 1 after being impacted.

8 is a schematic top view of a vehicle according to another embodiment of the invention.

FIG. 1 is a schematic side view of a vehicle according to an embodiment of the invention. Fig. 2 is a bottom view of the vehicle of Fig. 1. It should be noted that, in FIGS. 1 and 2, in order to clearly show the relative position between the bumper buffer device and the vehicle frame, only the vehicle frame and the bumper buffer device are only schematically shown, and the remaining structure is hidden.

Please refer to FIGS. 1 and 2. In this embodiment, the vehicle 100 includes a large beam assembly 110 and a bumper buffer device 200 disposed on the large beam assembly 110. The beam assembly 110 is the main frame of the vehicle 100. In this embodiment, the bumper cushioning device 200 is disposed in the front section of the beam assembly 110 to protect the front side of the vehicle 100. The detailed structure of the bumper buffer device 200 will be described below.

3 is a partial schematic view of the bumper buffer device of the vehicle of FIG. 1. FIG. 4 is a schematic view of the bumper buffer device of FIG. 3 from another perspective. Please refer to FIGS. 3 and 4. In this embodiment, the beam assembly 110 is a combination of multiple beams. In detail, the beam assembly 110 includes an upper beam 112, a lower beam 114, and a connecting beam 116 connecting the upper beam 112 and the lower beam 114 in the front section. Of course, in other embodiments, the beam assembly 110 may also be a single beam structure that integrates the upper beam 112 and the lower beam 114 together. The form of the beam assembly 110 is not limited thereto.

The bumper buffer device 200 includes a fixed frame 210 and a bumper assembly 230. An engaging member 212 and an elastic member 220. The fixing frame 210 may be fixed to the upper end of the beam assembly 110. In this embodiment, the upper end of the girder assembly 110 refers to the upper beam 112. Of course, in a single beam structure in which the upper beam 112 and the lower beam 114 are integrated, the upper end of the beam assembly may also be a portion near the upper end in the single beam structure. In this embodiment, the fixing frame 210 is fixed to the upper end of the beam assembly 110 by, for example, locking or riveting. Of course, the manner in which the fixing frame 210 is fixed to the upper end of the beam assembly 110 is not limited thereto.

In this embodiment, the bumper assembly 230 includes a bumper body 232, a rotating shaft 234 and two connecting rods 236, the bumper body 232 is parallel to the rotating shaft 234, and the bumper body 232 is connected to the rotating shaft 234 through the two connecting rods 236 , To present a glyph plane together. In this embodiment, the fixed frame 210 includes a perforation for accommodating the rotating shaft 234. The size of the perforation is slightly larger than the cross-sectional size of the rotating shaft 234, so that the rotating shaft 234 can rotate relative to the fixed frame 210 and pivotally connect to the fixed frame 210. In other words, the fixed frame 210 can be used as a bush for the rotating shaft 234. In this embodiment, the bumper assembly 230 is rotatably connected to the fixed frame 210 with a rotating shaft 234. In this embodiment, the bumper assembly 230 can select an appropriate material according to the vehicle type, such as steel, carbon fiber, PP material, glass fiber, etc., but it is not limited thereto.

5 is a partial enlarged view of the rotating shaft and the fixed frame of the bumper buffer device of FIG. 3. See Figure 5. In this embodiment, the bonding member 212 is, for example, solder, and is arranged at the connection between the fixed frame 210 and the rotating shaft 234 by spot welding to be connected to the rotating shaft 234 and the fixed frame 210, and the rotating shaft 234 is temporarily fixed to the fixed Box 210. in In the vehicle 100 of this embodiment, the rotating shaft 234 of the bumper assembly 230 is temporarily fixed to the fixed frame 210. Under normal driving conditions, the bumper assembly 230 can be stably fixed on the fixed frame 210 without relative movement, and is similar to a general bumper. It should be noted that the type and arrangement of the joint 212 are not limited thereto. In other embodiments, the engaging member 212 may also be a strong adhesive or the like, as long as the rotating shaft 234 can be temporarily fixed to the fixing frame 210.

Please return to FIG. 3 in this embodiment. The elastic member 220 is exemplified by an arc-shaped elastic arm. One end of the elastic member 220 is connected to the bumper body 232, and the other end of the elastic member 220 is connected to the lower end of the beam assembly 110, that is, the lower beam 114 of the beam assembly 110. The elastic member 220 is located between the beam assembly 110 and the bumper body 232 to serve as a buffer between the bumper body 232 and the beam assembly 110. Of course, in other embodiments, the elastic member 220 may also be a spring or a torsion spring, and the type of the elastic member 220 is not limited thereto. Designers can choose elastic members 220 with different elastic coefficients, sizes and materials according to different vehicle types and road conditions to provide the required cushioning.

In this embodiment, when the vehicle 100 is in a normal driving state, the rotating shaft 234 of the bumper assembly 230 is temporarily and stably fixed to the fixed frame 210, and is close to a general bumper, and the bumper assembly 230 is in travel It won't shake, shake, make abnormal sound, or scratch the car shell.

When the front of the vehicle 100 is impacted, the bumper body 232 will withstand a certain strength of impact force. At this time, the engaging member 212 may split and the fixed relationship between the rotating shaft 234 and the fixing frame 210 is destroyed, and the rotating shaft 234 will be restored to Rotatable state. The bumper assembly 230 rotates around the rotating shaft 234 to press the elastic member 220, and the elastic member 220 absorbs impact and deforms, thereby achieving the effect of buffering the impact.

More specifically, FIG. 6 is a schematic partial side view of the vehicle of FIG. 1 before being impacted. 7 is a schematic partial side view of the vehicle of FIG. 1 after being impacted. Please refer to Figure 3, Figure 5, Figure 6 and Figure 7. In this embodiment, for example, when an impact occurs in front of the vehicle 100, the front of the bumper body 232 will be pushed by an impact force F. If the impact force F strength is greater than the structural strength of the joint 212 (that is, the fixed frame 210 and the rotating shaft 234 Between the fixed strength), the engaging member 212 will be destroyed by the impact force F, and therefore, the fixed relationship between the fixed frame 210 and the rotating shaft 234 will be released. Once the fixed relationship between the fixed frame 210 and the rotating shaft 234 is released, the bumper assembly 230 will rotate relative to the fixed frame 210 with the rotating shaft 234 as the axis along the direction of the impact force F due to the force in front of the bumper body 232.

As shown in FIG. 7, at this time, the elastic member 220 will be deformed by the bumper body 232 and accumulate elastic potential energy. In other words, the impact energy received by the vehicle 100 is converted into the elastic potential energy of the elastic member 220. The elastic member 220 can function to absorb the impact force F. It is worth mentioning that this design can also extend the time of the single impact force F at the moment of an impact accident. According to the definition of impulse, prolonging the time when the vehicle 100 is subjected to an impact can reduce the size of the impact force, so that the cockpit 102 can be fully cushioned, and reduce the damage caused by the impact, to avoid serious injury to the driver and passengers.

It is worth mentioning that in traffic accidents, secondary collisions often occur. The conventional vehicle anti-collision device often fails to restore the function immediately after absorbing the impact force F. Therefore, in a car accident, the secondary impact often causes serious damage to the beam assembly (front longitudinal beam), the cockpit, and even the personnel in the car. Injury, so that the vehicle 100 scrapped or caused casualties. The bumper buffer device 200 of this embodiment is provided with an elastic member 220 that can instantly recover its shape. After the impact, the elastic member 220 can be restored immediately. If a secondary impact occurs, the bumper buffer device 200 of this embodiment can be reset in a short time and exert the effect of absorbing and buffering the secondary impact force F, providing immediate protection to the vehicle body and the driver. Therefore, the bumper cushioning device 200 of this embodiment has a better cushioning effect than the conventional bumper structure of a vehicle when facing a secondary impact. Obviously improved the conventional vehicle anti-collision structure can not effectively resist the lack of secondary impact force F.

In addition, the elastic member 220 accumulates elastic potential energy during the deformation process. As long as the impact force F is not greater than the strength that permanently deforms the elastic member 220. The elastic member 220 will release the elastic potential energy and return to its original state, and the bumper assembly 230 will be supported by the elastic member 220 again and return to the original position as shown in FIG. 6. In this way, when the bumper assembly 230 is repaired, it is only necessary to reconfigure the engaging member 212 to temporarily fix the rotating shaft 234 to the fixed frame 210, and there is no need to replace the entire set of bumper assemblies 230, which reduces the maintenance cost and improves the maintenance Convenience. The conventional vehicle anti-collision device usually needs to replace the entire set of bumpers during maintenance. The bumper buffer device 200 in this embodiment has the advantages of convenient maintenance, fast speed and low cost compared to the conventional vehicle anti-collision device.

In this embodiment, the bumper buffer device 200 is stored by the elastic member 220 The accumulated elastic potential energy method absorbs and cushions the impact force F, and the structure of the energy absorption box is omitted. Therefore, when manufacturing the bumper buffer device 200, a material with a light weight and a structural strength and safety can be selected, which is very suitable for a vehicle that requires a lightweight structure. Therefore, the bumper buffer device 200 of this embodiment can be installed on an electric vehicle to effectively improve safety. Of course, the bumper buffer device 200 of this embodiment can also be installed on a general vehicle, and the type of application is not limited thereto.

It should be noted that the position where the bumper buffer device 200 is arranged on the vehicle 100 is not limited to the above-mentioned arrangement form. It must be noted here that in the following embodiments, the element numbers and partial contents of the foregoing embodiments are used, wherein the same reference numbers are used to indicate the same or similar elements. Moreover, only the main differences are explained between different embodiments, and the description of related technical contents is omitted. For the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

8 is a schematic top view of a vehicle according to another embodiment of the invention. Referring to FIG. 8, the main difference between the vehicle 100' of this embodiment and the vehicle 100 of FIG. 2 is that, in FIG. 2, the bumper buffer device 200 is disposed in the front section of the vehicle 100. In FIG. 8, the vehicle 100 ′ has two sets of bumper buffer devices 200. The two sets of bumper buffer devices 200 are respectively disposed in the front section and the rear section of the vehicle 100 ′ to protect the front side and the rear of the vehicle 100 ′ side.

In summary, the bumper buffer device of the vehicle of the present invention is configured with a bumper structure having a rotating shaft and an elastic member. When the bumper body is collided, the impact force is transferred to the elastic member. Because the elastic element is suitable for converting the impact energy into a bomb Sexual potential energy, and can be restored to its original state after deformation. Therefore, after the bumper buffer device is impacted, there is no need to replace the entire set of bumper components, as long as the rotating shaft is fixed on the fixed frame by the joint, it not only reduces the cost, but also saves time and increases maintenance. Convenience.

In addition, the elastic member of the present invention can return to position immediately after being pressed, so the vehicle equipped with the bumper buffer device of the present invention has a better cushioning effect than the conventional vehicle anti-collision structure when facing the second impact . Therefore, in the face of a secondary impact, the bumper buffer device of the present invention can still exert the effect of absorbing and buffering the force of the secondary impact, to achieve the effect of protecting the vehicle, and reducing the damage of the main components of the vehicle and the personnel in the vehicle during the secondary impact degree.

In addition, the bumper buffer device of the present invention also replaces the energy-absorbing box structure in the conventional vehicle impact buffer structure, which not only saves the space for installing the energy-absorbing box but also reduces the weight of the vehicle body. However, conventional light-weight vehicles such as slow-speed electric vehicles cannot be equipped with a heavy-weight energy-absorbing box structure due to the demand for light-weight, and these types of vehicles usually lack a buffer structure during impact due to the short body. The invention can greatly improve the safety problem of this type of car by selecting light-weight materials and combining it with this type of car. Of course, the present invention can also be adapted to different car models by selecting different bumper materials, and the installation position is not limited, which can meet the needs of different car models, and the elimination of the energy-absorbing box structure also allows people in the art to Space can be used more freely when designing vehicles.

Although the present invention has been disclosed as above with examples, it is not intended to limit the Inventions, any person with ordinary knowledge in the technical field to which they belong, can make some changes and modifications without departing from the spirit and scope of the present invention. quasi.

110: beam assembly

112: Upper beam

114: lower beam

116: connecting beam

200: bumper buffer

210: fixed frame

212: Joint

220: elastic piece

230: bumper assembly

232: bumper body

234: shaft

236: connecting rod

Claims (10)

A bumper buffer device is suitable for being configured on a large beam assembly of a vehicle, wherein the beam assembly includes an upper end and a lower end, and the bumper buffer apparatus includes: a fixing frame suitable for being fixed to the beam assembly The upper end; a bumper assembly, including a bumper body and a rotating shaft connected to the bumper body, wherein the rotating shaft is pivotally connected to the fixed frame; an engaging member is connected to the rotating shaft and the fixed frame to connect The rotating shaft is temporarily fixed to the fixing frame; and an elastic member, one end of which is connected to the bumper body and the other end is adapted to be connected to the lower end of the beam assembly, wherein when the bumper body is impacted, the engaging member It is destroyed to release the fixed relationship between the rotating shaft and the fixed frame. The bumper assembly is adapted to rotate relative to the fixed frame around the rotating shaft. The elastic member is pressed by the bumper body to accumulate an elastic potential energy . The bumper buffer device as described in item 1 of the patent application scope, wherein the bumper assembly further includes two connecting rods, the bumper and the rotating shaft are parallel and connected through the two connecting rods, and jointly exhibit a zigzag structure. The bumper buffer device as described in item 1 of the patent application range, wherein the joint member includes solder, and is disposed at a partial junction of the rotating shaft and the fixed frame. The bumper buffer device as described in item 1 of the patent application range, wherein the elastic member comprises an arc spring, a spring or a torsion spring. A vehicle, including: a large beam assembly, including an upper end and a lower end; and at least one bumper buffer device, each bumper buffer device includes: a fixed frame, fixed to the upper end of the beam assembly; a safety The lever assembly includes a bumper body and a rotating shaft connected to the bumper body, wherein the rotating shaft is pivotally connected to the fixing frame; an engaging member is connected to the rotating shaft and the fixing frame to temporarily fix the rotating shaft To the fixing frame; and an elastic member, one end is connected to the bumper body and the other end is connected to the lower end of the beam assembly, wherein when the bumper body is hit, the engaging member is destroyed to release the rotating shaft and the In the fixed relationship between the fixed frames, the bumper assembly rotates relative to the fixed frame about the rotating shaft, and the elastic member is pressed by the bumper body to accumulate an elastic potential energy. The vehicle according to item 5 of the patent application scope, wherein the beam assembly has a front section and a rear section opposite to each other, the number of the at least one bumper buffer device is one, and the bumper buffer device is disposed at One of the front section and the rear section. The vehicle according to item 5 of the patent application scope, wherein the beam assembly has a front section and a rear section opposite to each other, and the at least one bumper buffer device includes two bumper buffer devices, which are respectively disposed in the front side region Segment and the rear section. The vehicle as described in item 5 of the patent application, wherein the bumper assembly further includes two connecting rods, the bumper and the rotating shaft are parallel and connected through the two connecting rods, and jointly exhibit a zigzag structure. The vehicle as described in item 5 of the patent application range, wherein the joint member includes solder and is disposed at a partial boundary between the rotating shaft and the fixed frame. The vehicle as described in item 5 of the patent application, wherein the elastic member includes an arc spring, a spring or a torsion spring.

Images