CN118056741A - Vehicle body rear frame and vehicle - Google Patents

Abstract

The utility model relates to a rear of body frame and vehicle, this rear of body frame includes first crossbeam, along the horizontal interval arrangement of automobile body a pair of tie-beam and along the horizontal interval arrangement of automobile body a pair of first longeron, and the front end of a pair of first longeron is used for linking to each other with the rear end of the roof side rail of the corresponding side of automobile body respectively, and the rear end of a pair of first longeron links to each other with the both ends of first crossbeam through corresponding first tie-beam respectively, and wherein, first crossbeam is for being used for prescribing a limit to the open-ended bottom end beam of trunk. The first connecting beam, the first cross beam and the first longitudinal beam are connected with the upper edge beam of the vehicle body, the rear part of the vehicle body and the front part of the vehicle body can be connected into a whole, the left side and the right side of the rear part of the vehicle body are connected into a whole, the rigidity and the structural strength of the rear part of the whole vehicle body can be improved, and the problems of more local modes, abnormal sound, easy vibration, rear passenger ear pressure, high noise and other NVH related problems caused by the poor rigidity and the structural strength of the rear part of the vehicle body are solved.

Description

Vehicle body rear frame and vehicle

Technical Field

The disclosure relates to the technical field of vehicles, in particular to a vehicle body rear frame and a vehicle.

Background

With the continuous development of the automobile industry and the increasing popularization of passenger cars, the requirements of masses on the automobile quality are higher and higher. The new energy automobile becomes an important direction of green development and transformation upgrading of the global automobile industry, how to iteratively upgrade to the new energy direction in the technical field of vehicles, how to quickly adapt the development of the new energy technology to the automobile body structure, and the development of competitive development of the automobile industry. In the prior art, the rear part of the vehicle (such as a car) is provided with a cross beam and a longitudinal beam, but the rigidity, the structural strength and the like of the rear part of the vehicle are still insufficient, more local modes are easy to generate, the rigidity of the whole structure is poor, and the problems of delayed response of the rear part, frequent occurrence of abnormal sound of the rear part, high external noise and the like are caused when the vehicle turns, so that the vehicle is difficult to adapt to the requirements of new energy vehicle types on the vehicle body structure.

Disclosure of Invention

An object of the present disclosure is to provide a vehicle body rear frame and a vehicle to solve the problems in the related art.

In order to achieve the above-mentioned purpose, the present disclosure provides a vehicle body rear frame, including first crossbeam, along the horizontal interval arrangement of automobile body a pair of tie-beam and along the horizontal interval arrangement of automobile body a pair of first longeron, the front end of a pair of first longeron is used for linking to each other with the rear end of the roof side rail of the corresponding side of automobile body respectively, the rear end of a pair of first longeron link to each other with the both ends of first crossbeam through corresponding first tie-beam respectively, wherein, first crossbeam is for being used for prescribing a limit to the open-ended lower cross beam of trunk.

Optionally, the frame at the rear part of the vehicle body further comprises a second cross beam, two ends of the second cross beam are respectively connected with the upper ends of the pair of first connecting beams, and the first cross beam, the second cross beam and the pair of first connecting beams are connected to form an annular structure.

Optionally, two ends of the second cross beam are respectively connected with the pair of first longitudinal beams.

Optionally, the vehicle body rear part frame further comprises a third beam, the third beam is located in front of the second beam, two ends of the third beam are respectively connected with the pair of first longitudinal beams, and the second beam, the third beam and the pair of first longitudinal beams are located between the second beam and the third beam and are connected to form a ring structure.

Optionally, the vehicle body rear frame further includes a fourth cross beam, the fourth cross beam is located in front of the third cross beam, two ends of the fourth cross beam are respectively connected with the pair of first longitudinal beams, and the third cross beam, the fourth cross beam, and a portion of the pair of first longitudinal beams located between the third cross beam and the fourth cross beam are connected to form a ring structure.

Optionally, the vehicle body rear part frame further comprises a pair of second longitudinal beams which are arranged at intervals along the transverse direction of the vehicle body, the front ends of the pair of second longitudinal beams are respectively used for being connected with the rear ends of the lower edge beams on the corresponding sides of the vehicle body, and the rear ends of the pair of second longitudinal beams are respectively connected with the two ends of the first cross beam and/or the lower ends of the corresponding first connecting beams.

Optionally, the vehicle body rear frame further includes a pair of second connecting beams arranged at intervals in the transverse direction of the vehicle body, the upper ends of the pair of second connecting beams are respectively connected with the first longitudinal beams of the corresponding sides, and the lower ends of the pair of second connecting beams are respectively connected with the second longitudinal beams of the corresponding sides; the first connecting beam, the second connecting beam, the part of the first longitudinal beam between the first connecting beam and the second connecting beam and the part of the second longitudinal beam between the first connecting beam and the second connecting beam are connected to form an annular structure.

Optionally, the vehicle body rear frame further comprises a third cross beam and a fifth cross beam, wherein the fifth cross beam is positioned in front of the first cross beam, and two ends of the fifth cross beam are respectively connected with the pair of second longitudinal beams; the third cross beam is located above the fifth cross beam, two ends of the third cross beam are respectively connected with the pair of first longitudinal beams, and the third cross beam, the fifth cross beam, the pair of second connecting beams, corresponding parts on the first longitudinal beams and corresponding parts on the second longitudinal beams are connected to form an annular structure.

Optionally, the vehicle body rear frame further comprises a pair of third connecting beams, the pair of third connecting beams are located in front of the pair of second connecting beams, the upper ends of the pair of third connecting beams are respectively connected with the corresponding first longitudinal beams, and the lower ends of the pair of third connecting beams are respectively connected with the corresponding second longitudinal beams; and/or the vehicle body rear part frame further comprises a fourth connecting beam positioned at one side in the transverse direction of the vehicle body, the fourth connecting beam is positioned behind the second connecting beam, the upper end of the fourth connecting beam is connected with the first connecting beam, the lower end of the fourth connecting beam is connected with the second longitudinal beam, and the fourth connecting beam is configured to be capable of being used as a charging port bracket.

Optionally, the vehicle body rear part frame further comprises a fifth connecting beam positioned at the other side of the vehicle body transverse direction, the fifth connecting beam is positioned at the rear of the second connecting beam, the upper end of the fifth connecting beam is connected with the corresponding first connecting beam, and the lower end of the fifth connecting beam is connected with the corresponding second longitudinal beam.

Optionally, the vehicle body rear frame further includes a first joint, the lower end of the second connecting beam is connected with the second longitudinal beam through the first joint, the upper end of the first joint is provided with a first connecting arm and a second connecting arm, the second connecting beam has a first wall and a second wall, the first connecting arm is connected with the first wall, and the second connecting arm is connected with the second wall.

Optionally, the first joint is a connection made of steel-aluminum alloy.

Optionally, the first longitudinal beam is configured to have a cavity at least at a portion connected to the second connecting beam or the third cross beam, and a reinforcing rib is provided in the cavity.

Optionally, the second longitudinal beam is used for being integrally formed with the floor at the corresponding position of the vehicle body.

According to another aspect of the present disclosure, there is provided a vehicle including the above-described vehicle body rear frame.

In the vehicle body rear part frame provided by the disclosure, the corresponding first connecting beams and the first longitudinal beams are connected with the upper edge beams on the corresponding sides of the vehicle body at two sides in the transverse direction of the vehicle body, and the vehicle body rear part and the vehicle body front part are connected into a whole, so that the rigidity and the structural strength of the vehicle body rear part can be improved. Moreover, since the pair of first connecting beams are respectively connected to both ends of the first cross member, the first cross member connects the beams on both sides in the lateral direction of the vehicle body as one body, and thus, the rigidity and structural strength of the rear portion of the vehicle body can be further improved. Compared with the scheme that a connecting plate positioned at the bottom side of an opening of a trunk is connected with a roof side rail of a vehicle body by adopting a thin plate in the related art, the scheme that the vehicle body rear frame is connected with the roof side rail of the vehicle body by adopting the first connecting beam, the first cross beam and the first longitudinal beam can integrate the rear part of the vehicle body with the front part of the vehicle body and integrate the left side and the right side of the rear part of the vehicle body, the rigidity and the structural strength of the rear part of the whole vehicle body can be improved, the local mode of the rear part of the vehicle body is reduced or avoided, the lowest-order mode of the rear part of the vehicle body is improved, and the problems of more local modes, abnormal sound, easy vibration, large noise and the like caused by the rigidity and the structural strength difference of the rear part of the vehicle body are solved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a partial structural side view schematic of a vehicle showing a rear body frame and roof side rails, roof side rails of the vehicle body;

FIG. 2 is a schematic side view from another perspective of a partial structure of a vehicle showing a rear body frame and roof side rails of the vehicle body;

Fig. 3 is a schematic diagram showing the connection relationship of part of the vehicle body rear frame, in which only the partial structure of each relevant part is shown, for example, only part of the inner wall is shown for the second side member;

FIG. 4 is a schematic view showing the connection relationship of parts of a vehicle body rear frame, in which only the partial structure of each relevant part is shown;

fig. 5 is a schematic diagram showing the connection relationship of part of the vehicle body rear frame, in which only the partial structure of each relevant part is shown.

Description of the reference numerals

1-A vehicle; 10-a vehicle body rear frame; 11-a first cross beam; 12-a second cross beam; 13-a third cross beam; 14-fourth cross beam; 15-a fifth cross beam; 21-a first connection beam; 22-a second connection beam; 23-a third connection beam; 24-fourth connection beams; 25-fifth connection beams; 31-a first stringer; 311-reinforcing ribs; 32-a second stringer; 41-a first joint; 411-first connecting arm; 412-a second connecting arm; 42-a second linker; 51-rear bumper beams; 20-upper side beams; 30-lower side beam.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise stated, terms such as "up, down, left, right, front, and rear" are generally consistent with up, down, left, right, front, and rear in a normal running state of a vehicle, and specifically refer to fig. 1 and 2, the direction toward the head of the vehicle 1 is the front, the direction toward the tail of the vehicle 1 is the rear, the front-rear direction is the longitudinal direction of the vehicle body, that is, the longitudinal direction of the vehicle 1, the upper direction is the direction away from the road surface, the lower direction is the direction toward the road surface, the up-down direction is the height direction of the vehicle body, the left-right direction is the lateral direction of the vehicle body, that is, the width direction of the vehicle 1. "inner and outer" refer to the inner and outer of the relevant parts.

In addition, in the following description, when referring to the drawings, the same reference numerals in different drawings denote the same or similar elements unless otherwise explained. The foregoing definitions are provided for the purpose of illustrating and explaining the present disclosure and should not be construed as limiting the present disclosure. Furthermore, the use of the terms first, second, etc. are used solely to distinguish one from another and should not be construed as indicating or implying a relative importance.

It has been found that, although a plurality of cross members and stringers are provided in the rear portion of the vehicle body in the related art, the plurality of cross members and stringers are relatively independent in the rear portion of the vehicle body, and an effective loop support structure is not formed, which is insufficient for supporting the entire rear structural system of the vehicle body. In some vehicles 1 of the related art, even if there is a ring structure, there is only a single ring structure, and the ring structure is near the vehicle body middle or front portion, and does not exert an effect of improving the rigidity of the vehicle body rear portion. Therefore, the problems of more local modes, poor rigidity of the whole structure, delayed response of the rear part, frequent occurrence of abnormal sound of the rear part, obvious tinnitus perception of rear passengers, large external noise and the like are caused at the rear part of the automobile body, and the automobile body structure requirements of new energy automobile types are difficult to adapt.

Specifically, since the rigidity and strength of the rear part of the vehicle body are low, the lowest-order mode is low, the influence of external excitation is easy, and the sheet metal on the vehicle body and the hanging piece easily generate large vibration and even resonance. And due to small modal interval, various vibration modes in different forms are coupled together to generate various complex vibrations, and even obvious ear pressure perception is generated in the vehicle. Moreover, because the rigidity of the rear part of the vehicle body is lower, the metal plate generates mutual friction to generate abnormal sound between the metal plate and the hanging parts, and the hanging parts are worn or even fall off. The vehicle tail response is delayed during turning, the deformation of the vehicle body of the twisted pavement is large, and durable cracking is easy to generate. The environment in the car has large response to external excitation, various noises are easy to be perceived, and driving experience is poor.

In view of this, as shown in fig. 1 to 5, according to an aspect of the present disclosure, there is provided a vehicle body rear frame 10 and a vehicle 1 including the vehicle body rear frame 10. The vehicle 1 may be a conventional fuel vehicle and a new energy vehicle, which is not limited by the present disclosure. For example, the vehicle 1 may be a hybrid vehicle, a pure electric vehicle, or a fuel cell electric vehicle. The present disclosure is also not limited to the model of the vehicle 1, and for example, it may be a three-compartment model.

As shown in fig. 1 and 2, the vehicle body rear frame 10 provided by the present disclosure includes a first cross member 11, a pair of first connecting beams 21 arranged at intervals in the lateral direction of the vehicle body, and a pair of first side members 31 arranged at intervals in the lateral direction of the vehicle body, the front ends of the pair of first side members 31 being respectively for connection with the rear ends of the roof side rails 20 on the corresponding sides of the vehicle body, that is, the front ends of the first side members 31 on the left side of the vehicle body in the pair of first side members 31 being for connection with the rear ends of the roof side rails 20 on the left side of the vehicle body, and the front ends of the first side members 31 on the right side of the vehicle body being for connection with the rear ends of the roof side rails 20 on the right side of the vehicle body. The rear ends of the pair of first stringers 31 are connected to both ends of the first cross member 11 through the corresponding first connection beams 21, respectively, that is, the rear ends of the first stringers 31 of the pair of first stringers 31 located on the left side are connected to one end of the first cross member 11 located on the left side through the first connection beams 21 located on the left side of the vehicle body, and the rear ends of the first stringers 31 located on the right side are connected to one end of the first cross member 11 located on the right side through the first connection beams 21 located on the right side of the vehicle body, wherein the first cross member 11 is a lower cross member serving as a trunk opening. In the vehicle 1 provided by the present disclosure, the trunk opening of the vehicle 1 may be formed by connecting several beams that surround in an annular structure, and the first cross beam 11 may function as a lower cross beam, whose position is, referring to fig. 1, may be located approximately at the rear of the trunk of the vehicle 1, above the rear impact beam 51.

In the vehicle body rear part frame 10 provided by the present disclosure, the corresponding first connecting beams 21, 31 are connected to the roof side rails 20 on the corresponding sides of the vehicle body on the two sides in the vehicle transverse direction, and the vehicle body rear part and the vehicle body front part are connected as a whole, so that the rigidity and the structural strength of the vehicle body rear part can be improved. Further, since the pair of first connecting beams 21 are connected to both ends of the first cross member 11, respectively, so that the first cross member 11 connects the beams on both sides in the lateral direction of the vehicle body as one body, it is possible to further improve the rigidity and structural strength of the rear portion of the vehicle body. Compared with the scheme that a connecting plate positioned at the bottom side of an opening of a trunk is connected with a roof side rail of a vehicle body by adopting a thin plate in the related art, the scheme that the first connecting beam 21, the first cross beam 11 and the first longitudinal beam 31 are connected with the roof side rail 20 of the vehicle body is adopted in the present disclosure, the rear part of the vehicle body and the front part of the vehicle body can be connected into a whole, the left side and the right side of the rear part of the vehicle body are connected into a whole, the rigidity and the structural strength of the whole rear part of the vehicle body can be improved, the local mode of the rear part of the vehicle body is reduced or avoided, and the lowest-order mode of the rear part of the vehicle body is improved, so that the problems related to NVH (noise, vibration, rear passenger ear pressure) and high noise and the like caused by the difference of the rigidity and the structural strength of the rear part of the vehicle body are solved.

In which, referring to fig. 1, the first connecting beam 21 extends in both the longitudinal direction of the vehicle body and the up-down direction of the vehicle body, the front end (i.e., upper end) of the first connecting beam 21 is connected to the rear end of the first side member 31, and the rear end (i.e., lower end) of the first connecting beam 21 is connected to the first cross member 11, i.e., the first connecting beam 21 is obliquely arranged.

As shown in fig. 1, the vehicle body rear frame 10 may further include a second cross member 12, both ends of the second cross member 12 being connected to upper ends (i.e., front ends) of the pair of first connecting beams 21, respectively, that is, one end of the second cross member 12 located on the left side of the vehicle body is connected to upper ends (i.e., front ends) of the pair of first connecting beams 21 located on the left side of the vehicle body, and one end of the second cross member 12 located on the right side of the vehicle body is connected to upper ends (i.e., front ends) of the pair of first connecting beams 21 located on the right side of the vehicle body, and the first cross member 11, the second cross member 12, and the pair of first connecting beams 21 are connected in a ring-shaped structure. Based on the structure, the rigidity and the structural strength of the rear part of the vehicle body can be improved, and the NVH related problems such as more local modes, abnormal sound problems, easy vibration, ear pressure problems of rear passengers, high noise and the like can be further improved.

Referring to fig. 1, a trunk opening may be defined around the first cross member 11, the second cross member 12, and a pair of first connecting beams 21.

As shown in fig. 1, the two ends of the second cross member 12 are also connected to a pair of first stringers 31, respectively, that is, one end of the second cross member 12 on the left side of the vehicle body is connected to a first stringer 31 on the left side of the vehicle body of the pair of first stringers 31, and one end of the second cross member 12 on the right side of the vehicle body is connected to a first stringer 31 on the right side of the vehicle body. In other words, in the present embodiment, both ends of the second cross member 12 are connected not only to the corresponding first connecting beam 21 but also to the corresponding first side member 31. In this way, the second cross member 12 not only plays a role in the lateral connection to the pair of first connecting beams 21 but also plays a role in the lateral connection to the pair of first longitudinal members 31, and can further improve the rigidity and structural strength of the rear portion of the vehicle body.

As shown in fig. 1, the vehicle body rear frame 10 may further include a third cross member 13, the third cross member 13 being located in front of the second cross member 12, both ends of the third cross member 13 being connected to the pair of first stringers 31, respectively, that is, one end of the third cross member 13 located on the left side of the vehicle body is connected to the first stringers 31 located on the left side of the vehicle body of the pair of first stringers 31, one end of the third cross member 13 located on the right side of the vehicle body is connected to the first stringers 31 located on the right side of the vehicle body, and the second cross member 12, the third cross member 13, and the pair of first stringers 31 being connected in a loop structure at a portion located between the second cross member 12 and the third cross member 13. Referring to fig. 1 and 5, the annular structure is an annular structure that is arranged in a substantially horizontal direction, and that extends in a lateral direction of the vehicle body, so that the rigidity and structural strength of the rear portion of the vehicle body, in particular, the rigidity and structural strength of the rear portion of the vehicle body in the lateral direction can be improved.

Referring to fig. 5, the second cross member 12, the third cross member 13, and the pair of first side members 31 may be directly connected in a continuous loop structure at a portion between the second cross member 12 and the third cross member 13 to enhance the rigidity and structural strength of the rear portion of the vehicle body as much as possible.

As shown in fig. 1, the vehicle body rear frame 10 may further include a fourth cross member 14, the fourth cross member 14 being located in front of the third cross member 13, both ends of the fourth cross member 14 being connected to a pair of first side members 31, respectively, and the third cross member 13, the fourth cross member 14, and a pair of first side members 31 being connected in a loop structure at portions located between the third cross member 13 and the fourth cross member 14. The annular structure extends along the transverse direction of the vehicle body, so that the rigidity and the structural strength of the rear part of the vehicle body can be improved, and particularly the rigidity and the structural strength of the rear part of the vehicle body in the transverse direction can be improved.

As shown in fig. 1, the vehicle body rear frame 10 may further include a pair of second stringers 32 arranged at intervals in the vehicle body transverse direction (width direction), the front ends of the pair of second stringers 32 being respectively for connection with the rear ends of the rocker 30 on the corresponding side of the vehicle body, i.e., the front ends of the second stringers 32 on the left side of the vehicle body in the pair of second stringers 32 being for connection with the rear ends of the rocker 30 on the left side of the vehicle body, the front ends of the second stringers 32 on the right side of the vehicle body being for connection with the rear ends of the rocker 30 on the right side of the vehicle body. The rear ends of the pair of second stringers 32 are connected to both ends of the first cross member 11 and/or the lower ends of the corresponding first connecting beams 21, that is, the rear ends of the pair of second stringers 32 located on the left side of the vehicle body are connected to one end of the first cross member 11 located on the left side of the vehicle body, or the rear ends of the pair of second stringers 32 located on the left side of the vehicle body are connected to the lower ends of the first connecting beams 21 located on the left side of the vehicle body, or are connected to one end of the first cross member 11 located on the left side of the vehicle body and the lower ends of the first connecting beams 21 located on the left side of the vehicle body at the same time. The rear ends of the second stringers 32 of the pair of second stringers 32 located on the right side of the vehicle body are connected to one end of the first cross member 11 located on the right side of the vehicle body, or the rear ends of the second stringers 32 of the pair of second stringers 32 located on the right side of the vehicle body are connected to the lower ends of the first connecting beams 21 located on the right side of the vehicle body, or both the end of the first cross member 11 located on the right side of the vehicle body and the lower ends of the first connecting beams 21 located on the right side of the vehicle body. Here, the second side member 32 may also be referred to as a rear side sill of the vehicle body.

In the present embodiment, the corresponding first connecting beam 21 and second longitudinal beam 32 are connected to the rocker 30 on the corresponding side of the vehicle body, and the rear portion of the vehicle body is connected to the front portion of the vehicle body as a single unit, while the upper portion and lower portion of the rear portion of the vehicle body are connected to the single unit, so that the overall rigidity and structural strength of the rear portion of the vehicle body can be improved.

Moreover, in the embodiment in which the front end of the second side member 32 is connected to the first cross member 11, the first cross member 11 integrally connects the beams on the left and right sides of the vehicle body, so that the rigidity and structural strength of the rear portion of the vehicle body can be further improved. In particular, the rigidity and the structural strength of the lower position of the rear part of the vehicle body are improved.

As mentioned above, the front end of the second longitudinal beam 32 may be connected to the lower end of the first longitudinal beam 31 alone, or to the first cross member 11 alone, or to both the first longitudinal beam 31 and the first cross member 11 at the same time, so as to enhance the rigidity and structural strength of the rear portion of the vehicle body as much as possible.

As shown in fig. 1, the vehicle body rear frame 10 may further include a pair of second connecting beams 22 arranged at intervals in the lateral direction of the vehicle body, upper ends of the pair of second connecting beams 22 being connected to the first side members 31 of the corresponding side, respectively, lower ends of the pair of second connecting beams 22 being connected to the second side members 32 of the corresponding side, respectively, that is, upper ends of the second connecting beams 22 of the pair of second connecting beams 22 located on the left side of the vehicle body being connected to the first side members 31 located on the left side of the vehicle body, and upper ends of the second connecting beams 22 located on the right side of the vehicle body being connected to the first side members 31 located on the right side of the vehicle body. The lower ends of the second connecting beams 22 on the left side of the vehicle body of the pair of second connecting beams 22 are connected to the second side members 32 on the left side of the vehicle body, and the lower ends of the second connecting beams 22 on the right side of the vehicle body are connected to the second side members 32 on the right side of the vehicle body. The first connecting beam 21, the second connecting beam 22, the portion of the first longitudinal beam 31 between the first connecting beam 21 and the second connecting beam 22, and the portion of the second longitudinal beam 32 between the first connecting beam 21 and the second connecting beam 22 are connected in a ring-shaped structure. Referring to fig. 1, the ring structure is a vertically arranged ring structure, and the ring structure is arranged in the longitudinal direction of the vehicle body, so that the rigidity and structural strength of the rear part of the vehicle body, in particular, the rigidity and structural strength of the rear part of the vehicle body in the longitudinal direction can be improved.

As shown in fig. 1 and 3, in one embodiment of the present disclosure, the vehicle body rear frame 10 may further include a third cross member 13 and a fifth cross member 15. The fifth cross member 15 is located in front of the first cross member 11 and may be used as a floor cross member, and two ends of the fifth cross member 15 are connected to a pair of second stringers 32, respectively. The third cross beam 13 is located above the fifth cross beam 15, two ends of the third cross beam 13 are respectively connected with a pair of first longitudinal beams 31, and the third cross beam 13, the fifth cross beam 15, a pair of second connecting beams 22 and a pair of second longitudinal beams 32 are connected to form an annular structure. Referring to fig. 1 and 3, the ring structure is a vertically arranged ring structure and extends in the transverse direction of the vehicle body, so that the overall rigidity and structural strength of the rear part of the vehicle body can be improved, and in particular, the rigidity and structural strength of the rear part of the vehicle body in the transverse direction can be improved.

As shown in fig. 1 and 2, the vehicle body rear frame 10 may further include a pair of third connecting beams 23, the pair of third connecting beams 23 being positioned in front of the second connecting beams 22, upper ends of the pair of third connecting beams 23 being respectively connected to the corresponding first longitudinal beams 31, and lower ends of the pair of third connecting beams 23 being respectively connected to the corresponding second longitudinal beams 32. By providing the third connecting beam 23 to connect the first side member 31 and the second side member 32 arranged in the up-down direction, the overall rigidity and structural strength of the rear portion of the vehicle body can be improved, and in particular, the rigidity and structural strength of the rear portion of the vehicle body in the height direction can be improved.

As shown in fig. 1, the vehicle body rear frame 10 may further include a fourth connecting beam 24, the fourth connecting beam 24 being located at one side in the vehicle body transverse direction, the fourth connecting beam 24 being located rearward of the second connecting beam 22, an upper end of the fourth connecting beam 24 being connected to the first connecting beam 21, a lower end of the fourth connecting beam 24 being connected to the second longitudinal beam 32, the fourth connecting beam 24 being configured to be able to function as a charging port bracket. The fourth connecting beam 24, in addition to serving as a charging port bracket, can enhance the overall rigidity and structural strength of the rear portion of the vehicle body, and particularly can enhance the rigidity and structural strength of the rear portion of the vehicle body in the height direction, by providing the fourth connecting beam 24 to connect the first connecting beam 21 and the second longitudinal beam 32 arranged in the up-down direction.

In the present disclosure, the second side member 32 may be manufactured alone or may be integrally formed with a floor (trunk floor) at a position corresponding to the vehicle body, to simplify the manufacturing process. For example, the second stringers 32 may be integrally die cast with the pair of trunk floors. Alternatively, the second stringers 32 may be made of an aluminum material.

Alternatively, as shown in fig. 1, the vehicle body rear frame 10 may further include a fifth connecting beam 25, the fifth connecting beam 25 being located at the other side in the vehicle body transverse direction, that is, at the opposite side from the fourth connecting beam 24, the fifth connecting beam may be located at the rear of the second connecting beam 22, the upper end of the fifth connecting beam 25 being connected to the corresponding first connecting beam 21 (the first connecting beam 21 located at the right side of the vehicle body), and the lower end of the fifth connecting beam 25 being connected to the corresponding second side member 32 (the second side member 32 located at the right side of the vehicle body). By providing the fifth connecting beam 25 to connect the first connecting beam 21 and the second longitudinal beam 32, the overall rigidity and structural strength of the rear portion of the vehicle body can be improved, and in particular, the rigidity and structural strength of the rear portion of the vehicle body in the height direction can be improved.

Furthermore, referring to fig. 1, by providing the fourth connecting beam 24 to connect the first connecting beam 21 and the second longitudinal beam 32 arranged in the up-down direction, and providing the fifth connecting beam 25 to connect the first connecting beam 21 and the second longitudinal beam 32, the annular structure formed by the first cross beam 11, the second cross beam 12 and the pair of first connecting beams 21 can be supported and reinforced, thereby facilitating the improvement of the stability, rigidity and structural strength of the annular structure, and further facilitating the improvement of the overall rigidity and structural strength of the rear portion of the vehicle body.

In the present disclosure, each longitudinal beam, each transverse beam, and each connecting beam having a connection relationship may be directly connected or may be connected by another connecting member, which is not limited in the present disclosure.

Taking the connection structure between the second connecting beam 22 and the second side member 32 as an example, as shown in fig. 3, in one embodiment of the present disclosure, the vehicle body rear frame 10 further includes a first joint 41, the lower end of the second connecting beam 22 is connected to the second side member 32 through the first joint 41, the upper end of the first joint 41 is provided with a first connecting arm 411 and a second connecting arm 412, the second connecting beam 22 has a first wall and a second wall, the first connecting arm 411 is connected to the first wall, and the second connecting arm 412 is used for the second wall connection. Based on this, through setting up first linking arm 411 and second linking arm 412 respectively with two lateral walls of second tie beam 22 link to each other, be favorable to promoting both joint strength and reliability to, can increase the power transmission route of force when passing power, avoid the concentration of force, be favorable to promoting the reliability that first joint 41 connects second tie beam 22 and second longeron 32.

The present disclosure is not limited to the specific structure of the first joint 41, and alternatively, the first joint 41 is a connection member made of steel aluminum alloy. The steel-aluminum alloy has the advantage of light weight while ensuring the strength requirement.

As shown in fig. 4, in one embodiment of the present disclosure, the first side member 31 is configured to have a cavity at least at a portion connected with the second connecting beam 22, and a reinforcing rib 311 is provided in the cavity. The first longitudinal beam 31 is provided with the cavity, so that the weight reduction is facilitated, and the reinforcing rib 311 is beneficial to ensuring that the rigidity and the structural strength of the first longitudinal beam 31 at the part connected with the second connecting beam 22 meet the requirements.

In the embodiment shown in fig. 4, the positions of the first longitudinal beam 31 and the second connecting beam 22 and the positions of the first longitudinal beam 31 and the third cross beam 13 are substantially coincident in the longitudinal direction of the vehicle body, so that the provision of the reinforcing rib 311 is also beneficial to ensuring that the rigidity and the structural strength of the first longitudinal beam 31 at the position of connection with the third cross beam 13 meet the requirements.

It will be appreciated that other parts of the first stringers 31 may also be provided with cavities and corresponding support structures, for example reinforcing ribs, at the location of the cavities.

In addition, in addition to the first side member 31, the second side member 32, the first cross member 11, the second cross member 12, the third cross member 13, the fourth cross member 14, the fifth cross member 15, the first connecting beam 21, the second connecting beam 22, the third connecting beam 23, the fourth connecting beam 24, the fifth connecting beam 25, and the like may have cavities in which supporting structures may be correspondingly arranged to ensure structural strength while facilitating weight reduction.

In summary, the vehicle body rear frame 10 of the present disclosure forms a multi-loop cage frame structure with a rear cavity continuously closed at the rear of the vehicle body through a plurality of longitudinal beams, a plurality of cross beams and a plurality of connecting beams, and can improve the rigidity and structural strength of the rear of the vehicle body. The automobile body rear part rigidity and structural strength are poor, and the automobile body rear part rigidity and structural strength are beneficial to solving the NVH related problems of more local modes, abnormal sound, easy vibration, rear-row passenger ear pressure, high noise and the like.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure. In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (15)

1. A vehicle body rear frame comprising a first cross member, a pair of first connecting beams arranged at intervals in a lateral direction of a vehicle body, and a pair of first side members arranged at intervals in the lateral direction of the vehicle body;

The front ends of the pair of first longitudinal beams are respectively connected with the rear ends of the upper edge beams on the corresponding sides of the vehicle body, and the rear ends of the pair of first longitudinal beams are respectively connected with the two ends of the first cross beam through corresponding first connecting beams;

The first cross beam is a lower cross beam used for limiting an opening of the trunk of the vehicle body.

2. The vehicle body rear frame of claim 1, further comprising a second cross member;

two ends of the second cross beam are respectively connected with the upper ends of the pair of first connecting beams;

the first cross beam, the second cross beam and the pair of first connecting beams are connected to form an annular structure.

3. The vehicle body rear frame according to claim 2, wherein both ends of the second cross member are further connected to the pair of first side members, respectively.

4. The vehicle body rear frame according to claim 2, characterized in that the vehicle body rear frame further comprises a third cross member;

the third cross beam is positioned in front of the second cross beam, and two ends of the third cross beam are respectively connected with the pair of first longitudinal beams;

The second cross beam, the third cross beam and the parts of the pair of first longitudinal beams, which are positioned between the second cross beam and the third cross beam, are connected to form an annular structure.

5. The vehicle body rear frame of claim 4, further comprising a fourth cross member;

The fourth cross beam is positioned in front of the third cross beam, and two ends of the fourth cross beam are respectively connected with the pair of first longitudinal beams;

The third cross beam, the fourth cross beam and the parts of the pair of first longitudinal beams, which are positioned between the third cross beam and the fourth cross beam, are connected to form an annular structure.

6. The vehicle rear body frame according to any one of claims 1 to 5, further comprising a pair of second stringers arranged at intervals in a vehicle transverse direction;

The front ends of the pair of second longitudinal beams are respectively connected with the rear ends of the lower edge beams on the corresponding sides of the vehicle body, and the rear ends of the pair of second longitudinal beams are respectively connected with the two ends of the first cross beam and/or the lower ends of the corresponding first connecting beams.

7. The vehicle body rear frame according to claim 6, further comprising a pair of second connection beams arranged at intervals in a lateral direction of the vehicle body;

The upper ends of the pair of second connecting beams are respectively connected with the first longitudinal beams on the corresponding sides, and the lower ends of the pair of second connecting beams are respectively connected with the second longitudinal beams on the corresponding sides;

The first connecting beam, the second connecting beam, the part of the first longitudinal beam between the first connecting beam and the second connecting beam and the part of the second longitudinal beam between the first connecting beam and the second connecting beam are connected to form an annular structure.

8. The vehicle body rear frame of claim 7, further comprising a third cross member and a fifth cross member;

The fifth cross beam is positioned in front of the first cross beam, and two ends of the fifth cross beam are respectively connected with the pair of second longitudinal beams;

The third cross beam is positioned above the fifth cross beam, and two ends of the third cross beam are respectively connected with the pair of first longitudinal beams;

the third cross beam, the fifth cross beam, the pair of second connecting beams, the corresponding parts on the first longitudinal beam and the corresponding parts on the second longitudinal beam are connected to form an annular structure.

9. The vehicle body rear frame according to claim 7, further comprising a pair of third connecting beams, the pair of third connecting beams being located in front of the pair of second connecting beams, upper ends of the pair of third connecting beams being connected to the corresponding first side members, respectively, and lower ends of the pair of third connecting beams being connected to the corresponding second side members, respectively; and/or the number of the groups of groups,

The vehicle body rear portion frame further includes a fourth connection beam located at one side in a vehicle body lateral direction, the fourth connection beam being located at a rear of the second connection beam, an upper end of the fourth connection beam being connected to the first connection beam, a lower end of the fourth connection beam being connected to the second longitudinal beam, the fourth connection beam being configured to be able to serve as a charging port bracket.

10. The vehicle body rear frame according to claim 9, further comprising a fifth connecting beam located on the other side in the vehicle body transverse direction, the fifth connecting beam being located rearward of the second connecting beam, an upper end of the fifth connecting beam being connected to the corresponding first connecting beam, and a lower end of the fifth connecting beam being connected to the corresponding second longitudinal beam.

11. The vehicle body rear frame according to claim 7, further comprising a first joint through which a lower end of the second connecting beam is connected to the second side member;

The upper end of the first joint is provided with a first connecting arm and a second connecting arm, the second connecting beam is provided with a first wall and a second wall, the first connecting arm is connected with the first wall, and the second connecting arm is connected with the second wall.

12. The vehicle body rear frame of claim 11, wherein the first joint is a connection member made of steel aluminum alloy.

13. The vehicle body rear frame according to claim 5, wherein the first side member is configured to have a cavity in which a reinforcing rib is provided at least at a portion connected to the second connecting beam or the third cross member of the vehicle body rear frame.

14. The vehicle body rear frame of claim 6, wherein the second side member is integrally formed with a floor panel at a position corresponding to the vehicle body.

15. A vehicle characterized by comprising a vehicle body rear frame according to any one of claims 1-14.