CN209700788U - New energy vehicle head-on crash reinforced structure - Google Patents

Abstract

The utility model discloses a frontal collision strengthening structure of a multi-layer new energy vehicle, which comprises a sub-frame and a front wall beam extending along the left and right directions, and also includes at least one rear support beam; the front end of the rear support beam and the rear end of the sub-frame Fixed, the rear end of the rear support beam is fixed with the middle part of the dash beam. The beneficial effects of the utility model are: the force on the front of the vehicle can be effectively transmitted to the rear of the vehicle, the intrusion of the front wall can be significantly reduced, and the driver and passengers and the vehicle can be protected.

Description

Frontal collision strengthening structure of new energy vehicles

technical field

The utility model belongs to the field of automobile manufacturing, in particular to a frontal collision strengthening structure of a new energy vehicle.

Background technique

On a traditional fuel vehicle, a longitudinal beam is designed on the body chassis, and the longitudinal beam runs through the front and rear directions of the body chassis. When the front of the car collides, the longitudinal beam can transmit the force of the front of the car to the rear of the car to the greatest extent, avoiding severe collapse of the front of the car, and maintaining the integrity of the engine room and cockpit to a certain extent, which is an important safety component. Chinese patent document CN206704299U disclosed "subframe and electric vehicle using the subframe" on December 5, 2017. The subframe includes a frame main body (101) and a motor suspension structure (105). The motor suspension structure Formed on the main body of the vehicle frame, it includes a first shell (107) and a second shell (108) that are fastened to each other; wherein, a gap for accommodating the motor is formed between the first shell and the second shell. The cavity (B) of the tie rod bushing, the first housing and the second housing are formed with a through hole allowing the connecting piece to pass through the cavity (B) for fixed connection with the bushing. The applicant claims that the subframe of the utility model is easy to change the suspension point of the motor, which improves the versatility. In new energy vehicles that use batteries as energy storage, the battery pack is arranged in the space under the floor. In order to ensure the gap between the floor and the battery pack, most new energy vehicles cannot be designed vertically under the floor like traditional fuel vehicles. The beam structure leads to hidden dangers in safety. For example, as in the aforementioned prior art solution, the force transmission of the longitudinal beam is lacking, resulting in a large amount of intrusion of the front wall of the vehicle during a frontal collision, and serious injuries to the occupants in the cockpit.

Contents of the invention

Based on the above problems, the utility model provides a frontal collision strengthening structure of a new energy vehicle, which can effectively transmit the force on the front of the vehicle to the rear of the vehicle, significantly reduce the intrusion of the front wall, and protect the driver and the vehicle.

In order to achieve the purpose of the invention, the utility model adopts the following technical solutions: a frontal collision strengthening structure of a multi-layer new energy vehicle, including a sub-frame and a front wall beam extending along the left and right directions, and at least one rear support beam; the rear support beam The front end of the frame is fixed to the rear end of the subframe, and the rear end of the rear support beam is fixed to the middle part of the dash cross member.

The multi-layer new energy vehicle frontal collision strengthening structure designed in this scheme includes sub-frame and front wall beam. The front wall is a horizontal baffle separating the engine room and the cockpit. The front wall beam is located under the front wall and extends along the left and right directions of the vehicle body. The cowl cross member has high strength properties. This scheme forms an integral structure by rigidly connecting the front subframe with the front wall beam through the rear support beam, which can well improve the structural force. After this design, the space under the body floor can be vacated for the layout of the battery pack, and the force transmission effect in the front and rear directions of the body can be ensured to ensure that the safety of the vehicle will not be reduced, which is conducive to the body layout of new energy vehicles. and marketing. In order to improve rigidity, those skilled in the art can design reinforcements at appropriate positions of the door sill strips as required. The number of rear support beams can be one or more, and can be selected by those skilled in the art as required.

Preferably, the length direction of the rear support beam is the front and rear direction of the vehicle body, the front end of the rear support beam is fixed to the middle part of the rear end of the sub-frame, and the rear end of the rear support beam is fixed to the middle part of the dash cross member. This design makes the connection shape of the subframe, rear support beam and front wall beam form an I-shape, and the I-shape has a strong force-bearing effect in the mechanical structure, so this scheme can significantly improve the structural strength. The force effect is comparable to the longitudinal beam structure of traditional fuel vehicles.

Preferably, the rear support beam is a straight pipe. Straight pipe has the best axial force strength.

Preferably, the rear support beam is a hollow straight pipe. Under the premise of ensuring strength, the rear support beam is hollow, which contributes to the weight reduction of the vehicle body.

Preferably, reinforcing ribs are arranged inside the rear supporting beam, and the reinforcing ribs extend along the length direction of the rear supporting beam. Ribs further strengthen the rear support beam in the axial direction.

Preferably, the cross-sectional shape of the rear support beam is rectangular; the lower mating surface of the rear end of the subframe is a horizontal plane, and the upper end surface of the front end of the rear support beam is fixed to the mating surface of the rear end of the subframe; The surface is a horizontal plane, and the lower end surface of the rear end of the rear support beam is fixed to the mating surface of the front end of the dash beam. Through the design of the cross-sectional shape of the rear support beam, the mating surface of the rear end of the subframe, and the mating surface of the front wall beam, the combination of two connecting parts can be made more tightly.

Preferably, a riveting hole is provided on the upper end surface of the front end of the rear support beam, and a riveting hole is provided at a corresponding position on the lower mating surface of the rear end of the sub-frame, and the rivet simultaneously passes through the riveting connection between the front end of the rear support beam and the sub-frame. After the holes are riveted, the front end of the rear support beam, the rivets and the sub-frame are fixed by welding after the riveting; the lower end surface of the rear end of the rear support beam is provided with riveting holes, and the corresponding position on the upper mating surface of the front wall beam is provided with The riveted through hole, the rivet passes through the rear end of the rear support beam and the riveted through hole on the front wall beam at the same time and then is riveted. After riveting, the rear end of the rear support beam, the rivet and the front wall beam are fixed by welding. The scheme is designed to be fixed by riveting and welding, which can ensure the connection strength.

Preferably, there are no less than two riveting through holes at the front end and the rear end of the rear support beam. Such a design can improve the connection strength as much as possible.

To sum up, the beneficial effect of the utility model is that it can effectively transmit the force on the front of the vehicle to the rear of the vehicle, significantly reduce the intrusion of the front wall, and protect the drivers and passengers as well as the vehicle.

Description of drawings

Fig. 1 is a perspective view of the utility model.

Fig. 2 is a top view of the utility model.

Fig. 3 is a front view of Fig. 2 .

Figure 4 is a perspective view of the rear support beam.

Among them: 1 auxiliary frame, 2 front wall beam, 3 rear support beam, 4 reinforcement rib, 5 riveted through hole.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

The embodiment shown in Fig. 1, Fig. 2 and Fig. 3 is a frontal collision strengthening structure of a new energy vehicle, which is installed on a certain type of new energy vehicle.

The structure includes a subframe 1 located in front of the vehicle body, a front wall beam 2 located below the front wall of the vehicle body, and a rear support beam 3, and the number of the rear support beam in this example is one. As shown in FIG. 4 , the rear support beam is a hollow straight pipe made of steel pipe, and reinforcing ribs 4 are provided inside the pipe extending along the length direction of the rear support beam. The cross-sectional shape of the rear support beam is rectangular, and two riveting through holes 5 are arranged at the front end and the rear end of the rear support beam, and the riveting through holes run through the cross-sectional shape of the rear support beam in the vertical direction.

The front end of the rear support beam is fixed to the middle part of the rear end of the subframe, and the rear end of the rear support beam is fixed to the middle part of the cowl beam. The three form a typical I-shaped structure. A mating surface is arranged under the rear end of the auxiliary frame, and the mating surface is a horizontal plane, and two riveting holes are correspondingly designed on the mating surface. The cowl beam is also provided with a mating surface, which is also a horizontal plane extension, and is also provided with two riveting holes correspondingly. The front end of the rear support beam is fixed to the middle part of the rear end of the subframe, and the rear end is fixed to the middle part of the cowl beam. The fixing method is rivet welding, that is, the rivets are riveted through the front end of the rear support beam and the riveting holes on the subframe at the same time, and then the front end of the rear support beam, the rivets and the subframe are fixed by welding after riveting. Similarly, riveting is carried out after the rivets are penetrated through the riveting holes on the rear end of the rear support beam and the riveting hole on the front wall beam at the same time, and the rear end of the rear support beam, the rivets, and the front wall beam are fixed by welding after riveting.

The frontal collision strengthening structure of the new energy vehicle in this example, the front sub-frame, the rear support beam, and the front wall beam are firmly fixed as one, leaving an effective space in the middle under the floor for the layout of the battery pack. The impact force from the front end of the vehicle body can be effectively transmitted to the rear of the vehicle body after being transmitted by the subframe, rear support beam, and front wall beam, thereby reducing the amount of front wall intrusion and reducing the deformation of the battery pack during the collision , which greatly improves the safety performance of the car. According to the crash simulation test conducted by the inventor with a computer program, the safe stress strength of the scheme of this embodiment in the front and rear directions of the vehicle body is comparable to other longitudinal beam structures of fuel vehicles with the same conditions.

Claims (8)

1. a kind of new energy vehicle head-on crash reinforced structure, the front wall crossbeam that extends including subframe (1) and in left-right direction (2), characterized in that further include at least one rear support beam (3)；The front end of rear support beam is fixed with subframe rear end, rear support The rear end of beam and the middle part of front wall crossbeam are fixed.

2. a kind of new energy vehicle head-on crash reinforced structure according to claim 1, characterized in that the length of rear support beam Direction is vehicle body front-rear direction, and the middle part of the rear end of the front end and subframe of rear support beam is fixed, and the rear end of rear support beam is with before The middle part for enclosing crossbeam is fixed.

3. a kind of new energy vehicle head-on crash reinforced structure according to claim 1 or 2, characterized in that rear support beam is Straight tube.

4. a kind of new energy vehicle head-on crash reinforced structure according to claim 3, characterized in that rear support beam is hollow Straight tube.

5. a kind of new energy vehicle head-on crash reinforced structure according to claim 1 or 2, characterized in that in rear support beam Equipped with muscle (4) are strengthened, the length direction for strengthening muscle along rear support beam extends.

6. a kind of new energy vehicle head-on crash reinforced structure according to claim 3, characterized in that the rear support beam Cross sectional shape is rectangle；The lower mating surface of subframe is horizontal plane, the upper surface of rear support beam front end and matching for subframe rear end Conjunction face is fixed；The upper mating surface of front wall crossbeam is horizontal plane, and the lower end surface of rear support beam rear end and the mating surface of front wall crossbeam are solid It is fixed.

7. a kind of new energy vehicle head-on crash reinforced structure according to claim 6, characterized in that rear support beam front end Upper surface is equipped with riveting through holes (5), and corresponding position is equipped with riveting through holes in mating surface under the rear end of subframe, and rivet passes through simultaneously Riveted after riveting through holes on logical rear support beam front end and subframe, after riveting by welding by rear support beam front end, Rivet, subframe three fix；The lower end surface of rear support beam rear end is equipped with riveting through holes, right in the upper mating surface of front wall crossbeam It answers position to be equipped with riveting through holes, is riveted after the riveting through holes that rivet penetrates through on rear support beam rear end and front wall crossbeam simultaneously, Rear support beam rear end, rivet, front wall crossbeam three are fixed by welding after riveting.

8. a kind of new energy vehicle head-on crash reinforced structure according to claim 7, characterized in that rear support beam front end and The riveting through holes of rear end are no less than 2.