New energy vehicle rear auxiliary frame combined with inner reinforcing ribs

Abstract

The utility model relates to the field of electric vehicle manufacturing and design, in particular to a new energy vehicle rear auxiliary frame combined with inner reinforcing ribs. In order to overcome the technical prejudice in the prior art and adapt to small and wide vehicle models, the stress transmission is fast and stable, and the transmission path is fast and accurate. Comprising an upper cross beam, a lower cross beam and a side beam, the upper cross beam and the lower cross beam are transversely arranged in parallel, the side beam is vertically connected with the upper cross beam and the lower cross beam, the upper cross beam, the lower cross beam and the side beam are all of a hollow pipe body structure, the lower cross beam is provided with a rear suspension lining, and a rear swing arm mounting seat is arranged at the tail end of the side beam and comprises a front piece and a rear piece. The front piece and the rear suspension lining are connected through an upper combined rib arranged on the surface of the top of the lower cross beam, the head end and the tail end of the lower cross beam are provided with rear vehicle body linings, and the rear vehicle body linings and the rear suspension lining are connected through a lower combined rib arranged in the inner wall of the lower cross beam. The defects that in the prior art, a lower beam is insufficient in rigidity, and a reinforcing structure is not combined are overcome.

Description

Technical Field

[0001] The utility model relates to the field of electric vehicle manufacturing and design, in particular to a rear subframe of a new energy vehicle combined with internal reinforcing ribs. Background Art

[0002] In the field of electric vehicles, the subframe, like ordinary cars, is the skeleton of the front and rear axles and an important part of the front and rear axles. Its function is to support the chassis components, improve the isolation of road vibration and noise, and improve the connection stiffness of the suspension. It includes a front subframe and a rear subframe. The rear subframe of the car refers to the subframe installed at the rear of the car, which is usually used to support and fix the rear suspension system, wheels and trunk of the vehicle. The difference is that in the field of electric vehicles, that is, new energy vehicles, the endurance is generally emphasized, that is, the lightweight technology of the existing rear subframe is further emphasized. In order to reduce the weight, the rear subframe of the existing electric vehicle generally chooses an aluminum rear subframe, and is integrated to minimize accessories and reduce the thickness of its own tube wall, such as the rear subframe and car with patent number CN219115556U, wherein the rear subframe is used for a car, and the car includes a rear body and a longitudinal beam installed on the rear body. The two opposite ends of the front part of the rear sub-frame body are provided with mounting grooves, the mounting grooves have a first opening facing the longitudinal beam, the end of the longitudinal beam close to the rear sub-frame body is inserted through the first opening to at least partially cover the end of the longitudinal beam, and the first fastener passes through the groove wall of the mounting groove and the longitudinal beam in sequence, and is fastened to the rear body. The technical solution of the utility model improves the structural integration of the rear sub-frame and the rear body, and reduces performance redundancy;

[0003] This type of rear subframe generally tries to reduce the weight of the main body as much as possible, and adds reinforcement structures in the places where the rigidity is weak. These reinforcement structures are basically not combinable and do not have the active weight reduction feature, which will only cause excess performance. Therefore, there is a need for a rear subframe with reinforcement structures that can be combined with each other and have high combinability and is suitable for the performance requirements of new energy vehicles. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the technical bias of the prior art, to adapt to small and wide vehicle models, to adapt to such vehicle models to transmit stress quickly and stably, and to transmit stress quickly and accurately, and to provide a rear subframe of a new energy vehicle with internal reinforcement ribs.

[0005] The utility model solves the above-mentioned technical problems through the following technical solutions: a rear subframe of a new energy vehicle combined with internal reinforcing ribs, comprising an upper crossbeam and a lower crossbeam arranged in parallel in a transverse direction, and a side beam vertically connecting the upper crossbeam and the lower crossbeam, wherein: the upper crossbeam, the lower crossbeam and the side beam are all hollow tube structures, the lower crossbeam is provided with a rear suspension bushing, only 1 / 3~1 / 2 of the rear suspension bushing is buried in the lower crossbeam, and 2 / 3~1 / 2 is protruding on the surface of the lower crossbeam, a rear swing arm mounting seat is provided at the tail end of the side beam, the rear swing arm mounting seat comprises a front plate and a rear plate, an upper combined rib is arranged on the top surface of the lower crossbeam to connect the front plate and the rear suspension bushing, a rear body bushing is arranged at the head end and the tail end of the lower crossbeam, and a lower combined rib is arranged in the inner wall of the lower crossbeam to connect the rear body bushing and the rear suspension bushing.

[0006] After the above structure is set, the ring structure of the rear subframe at the rear suspension bushing will be connected to the rear swing arm mounting seat, the rear suspension bushing and the rear body bushing are connected by the middle and lower combined ribs on the inner wall of the lower cross beam, and the rear swing arm mounting seat and the rear body bushing are connected by an upper combined rib on the top surface of the lower cross beam. Therefore, there is a reinforcing rib structure for stress transmission internally and mutually among the rear suspension bushing, the rear swing arm mounting seat and the rear body bushing, and the reinforcing rib structure is distributed on the surface and inside of the lower cross beam, which not only strengthens the surface stiffness and stress transmission, but also takes into account the internal stiffness and stress transmission. The three form a stable triangular structure under the setting of the upper combined ribs and the lower combined ribs. The triangular structure is the shortest between each other, which is suitable for this type of vehicle to transmit stress quickly and stably, and the transmission path is fast and accurate to strengthen the load-bearing strength of the lower cross beam.

[0007] Preferably, the side beam comprises a left beam and a right beam, a middle beam is arranged between the left beam and the right beam, and the middle beam and the lower cross beam are arranged adjacent to each other. The middle beam can help the lower cross beam to further bear the weight of the motor or engine, especially the motor or engine with weight concentrated on the lower side.

[0008] Preferably, the head end and the tail end of the middle beam are provided with a central bushing, the central bushing is connected to the bottom or inner side of the side beam, and the central bushing is provided with a middle reinforcement rib, which extends from the central bushing to the middle beam. The adoption of this structure can not only make the central bushing originally provided at the middle section of the side beam and the middle beam into an integrated structure, save the setting space, and do not affect the rigidity of the side beam, but also can greatly reduce the thickness and size of the middle beam when only the middle reinforcement rib is provided, so as to achieve the performance without excess and proper design.

[0009] Preferably, the surface of the lower cross beam is further provided with side composite ribs between the rear suspension bushing and the rear swing arm mounting seat, the side composite ribs are connected to the rear plate, and the side composite ribs and the upper composite ribs are not arranged in parallel. The side composite ribs and the upper composite ribs are also a combined reinforcing rib structure, which can transfer the stress of the rear swing arm mounting seat and the tail end of the side beam to the rear body bushing instead of directly transferring most of it to the rear body bushing as in the prior art, but can transfer a part of it through the upper end surface through the side composite ribs and the upper composite ribs to guide it to the lower cross beam that can withstand greater stress, and further guide it to be transmitted to a large area of ​​the beam body by the rear suspension bushing. On the other hand, after the rear suspension bushing is installed with the motor, the sinking weight caused by the load bearing will also be pulled by the side composite ribs and the upper composite ribs, thereby strengthening the stiffness of the rear suspension bushing to the head and tail ends of the lower cross beam.

[0010] Preferably, the bottom of the middle beam is provided with a plurality of triangular weight-reducing grooves, which can adjust the weight of the middle beam when the thickness of the middle beam is designed, and the triangular structure forms edge ribs, which can enhance the rigidity.

[0011] Preferably, a pair of front motor fixing brackets are arranged on the upper cross beam, and the upper cross beam is provided with U-shaped or O-shaped internal reinforcement ribs in the inner wall of the front motor fixing bracket. The front motor fixing bracket has to bear the weight of the motor head end, and the relative rigidity will be much smaller if it is not integrally formed inside the recessed upper cross beam structure designed according to the common prior art, so it is necessary to improve the rigidity of the front motor fixing bracket, and the internal reinforcement ribs are similar to the pier structure, which improves the internal rigidity and greatly increases the ability of the stress at the bottom of the front motor fixing bracket to diffuse around the upper cross beam body.

[0012] Preferably, the ring structure of the rear suspension bushing is hollowed out, and a sand core positioning opening is hollowed out inside the beam body of the lower cross beam, which can help the rear suspension bracket to be positioned.

[0013] In addition, a new energy vehicle is provided, comprising a new energy vehicle rear subframe provided on the new energy vehicle and combined with internal reinforcement ribs.

[0014] Compared with the prior art, the beneficial effects of the implementation of the utility model are as follows: the defects of the prior art, that is, the lower cross beam has insufficient rigidity and the reinforcement structure has no combination, and the improved lower cross beam, whether its central structure or the load-bearing capacity at both ends of the head and tail, focuses on the rear suspension bushing and the rear body bushing as the center, and under the combined reinforcement of the upper combined ribs and the lower combined ribs, the rigidity and stress transfer capacity are improved to a certain extent, so that the overall rear subframe is light and small but can adapt to wide and heavy motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a top view of the overall structure;

[0016] Figure 2It is the overall side view structure diagram;

[0017] Figure 3 It is a three-dimensional structure diagram;

[0018] Figure 4 It is the overall back three-dimensional structure diagram;

[0019] Figure 5 This is the internal structure diagram of the upper cross beam;

[0020] Figure 6 This is the structural diagram of the inner cavity of the lower cross beam;

[0021] Figure 7 This is a structural diagram of Example 2;

[0022] In the figure: upper cross beam 1, lower cross beam 2, side beam 3, rear suspension bushing 4, rear swing arm mounting seat 5, front plate 6, rear plate 7, upper combined rib 8, rear body bushing 9, lower combined rib 10, left beam 11, right beam 12, middle beam 13, central bushing 14, middle reinforcement rib 15, side combined rib 16, weight reduction groove 17, front motor fixing bracket 18, internal reinforcement rib 19, ring structure 20, sand core positioning opening 21. Implementation

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0024] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.Preferred embodiments of the present invention will now be described in detail, examples of which are shown in the accompanying drawings.Where possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.

[0025] In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the specification of the present invention may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article.

[0026] Furthermore, it is required that the present invention be understood not only by the actual terms used but also by the meanings contained in each term.

[0027] like Figure 1-2 As shown, a rear subframe of a new energy vehicle combined with internal reinforcement ribs comprises an upper crossbeam 1 and a lower crossbeam 2 arranged in parallel in a transverse direction, and a side beam 3 vertically connecting the upper crossbeam 1 and the lower crossbeam 2, and a frame structure is formed under low-pressure hollow integrated aluminum casting; wherein: the upper crossbeam 1, the lower crossbeam 2 and the side beam 3 are all hollow tube structures;

[0028] like Figure 3As shown, the lower cross beam 2 is provided with a rear suspension bushing 4, 1 / 2 of which is buried in the lower cross beam 2, and the remaining 1 / 2 is protruded and arranged on the surface of the lower cross beam 2. The rear suspension bushing 4 is a structure half-surrounded by the beam body, and the advantage is that the rear suspension bushing can integrate its own rigidity requirements into the beam body;

[0029] Continue as Figure 1 , 3 As shown, a rear swing arm mounting seat 5 is provided at the rear end of the side beam 3, and the rear swing arm mounting seat 5 includes a front plate 6 and a rear plate 7, an upper composite rib 8 is provided on the top surface of the lower cross beam 2 to connect the front plate 6 and the rear suspension bushing 4, a rear body bushing 9 is provided at the head end and the tail end of the lower cross beam 2, and a lower composite rib 10 is provided in the inner wall of the lower cross beam 2 to connect the rear body bushing 9 and the rear suspension bushing 4.

[0030] After the above structure is set, the annular structure of the rear subframe at the rear suspension bushing 4 will be connected to the rear swing arm mounting seat 5, the rear suspension bushing 4 and the rear body bushing 9 are connected by the lower combined rib 10 in the inner wall of the lower cross beam 2, and the upper combined rib 8 is set on the top surface of the lower cross beam 2 to connect the rear swing arm mounting seat 5 and the rear body bushing 9. Therefore, there is a reinforcing rib structure for stress transmission inside and between the rear suspension bushing 4, the rear swing arm mounting seat 5, and the rear body bushing 9, and the reinforcing rib structure is distributed on the surface and inside of the lower cross beam, which not only strengthens the surface stiffness and stress transmission, but also takes into account the internal stiffness and stress transmission. The three form a stable triangular structure under the setting of the upper combined rib 8 and the lower combined rib 10. The triangular structure is the shortest between each other, which is suitable for this type of vehicle to transmit stress quickly and stably, and the transmission path is fast and accurate to strengthen the load-bearing strength of the lower cross beam.

[0031] like Figure 1 , 4 As shown, the side beam 3 includes a left beam 11 and a right beam 12, a middle beam 13 is arranged between the left beam 11 and the right beam 12, and the middle beam 13 and the lower cross beam 2 are arranged adjacent to each other. The middle beam can help the lower cross beam to further bear the weight of the motor or engine, especially the motor or engine with weight concentrated on the lower side.

[0032] The head end and the tail end of the middle beam 13 are provided with a central bushing 14, the central bushing 14 is connected to the bottom or inner side of the side beam, and the central bushing 14 is provided with a middle reinforcing rib 15, and the middle reinforcing rib 15 is extended from the central bushing 14 to the middle beam 13. The adoption of this structure can not only make the central bushing 14 and the middle beam 13 originally arranged at the middle section of the side beam into an integrated structure, save the setting space, and do not affect the rigidity of the side beam, but also can greatly reduce the thickness and size of the middle beam when only the middle reinforcing rib 15 is arranged, so as to achieve no excess performance and proper design.

[0033] like Figure 4As shown, the bottom of the middle beam 13 is provided with a plurality of triangular weight-reducing grooves 17. The weight-reducing grooves can adjust the weight of the middle beam again when the thickness of the middle beam is designed by the middle beam, and the triangular structure will form edge ribs, which can enhance the rigidity.

[0034] like Figure 5 As shown, a pair of front motor fixing brackets 18 are arranged on the upper cross beam 1, and a U-shaped or O-shaped internal reinforcement rib 19 is arranged in the inner wall of the front motor fixing bracket 18. The front motor fixing bracket has to bear the weight of the motor head end, and the relative rigidity will be much smaller if it is not integrally molded inside the concave upper cross beam structure designed according to the common prior art, so it is necessary to improve the rigidity of the front motor fixing bracket, and the internal reinforcement rib is similar to the pier structure, which improves the internal rigidity and greatly increases the ability of the stress at the bottom of the front motor fixing bracket to diffuse around the upper cross beam body.

[0035] like Figure 3 As shown, the ring structure 20 of the rear suspension bushing 4 is hollowed out, and a sand core positioning opening 21 is hollowed out inside the beam body of the lower cross beam 2. This can help the rear suspension bracket to be positioned.

[0036] Example 2: Figure 7 As shown, on the basis of Example 1, the surface of the lower cross beam 2 is further provided with a side composite rib 16 between the rear suspension bushing 4 and the rear swing arm mounting seat 5, and the side composite rib 16 is connected to the rear plate 7, and the side composite rib 16 and the upper composite rib 8 are not arranged in parallel. The side composite rib 16 and the upper composite rib 8 are also a composite reinforcement rib structure, which can transfer the stress of the rear swing arm mounting seat and the rear end of the side beam to the rear body bushing instead of directly transferring most of it to the rear body bushing as in the prior art, but can transfer a part of it to the lower cross beam 2 that can withstand greater stress through the side composite rib 16 and the upper composite rib 8 on the upper end surface, and further guide it to be transmitted to a large area of ​​the beam body by the rear suspension bushing 4. On the contrary, after the rear suspension bushing 4 is installed with the motor, the sinking weight brought by the load bearing will also be pulled by the side composite rib 16 and the upper composite rib 8, thereby strengthening the stiffness of the rear suspension bushing 4 to the head and tail ends of the lower cross beam 2.

[0037] Finally, the rear subframe of the new energy vehicle combined with the internal reinforcement ribs of Example 1 and Example 2 is set on the new energy vehicle, and is combined into a new energy vehicle including the rear subframe of the new energy vehicle combined with the internal reinforcement ribs.

[0038] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A rear subframe of a new energy vehicle combined with internal reinforcement ribs, comprising an upper crossbeam and a lower crossbeam arranged in parallel in a transverse direction, and a side beam vertically connecting the upper crossbeam and the lower crossbeam, characterized in that: The upper cross beam, lower cross beam and side beam are all hollow tube structures. The lower cross beam is provided with a rear suspension bushing, only 1 / 3 to 1 / 2 of the rear suspension bushing is buried in the lower cross beam, and 2 / 3 to 1 / 2 is protruded on the surface of the lower cross beam; a rear swing arm mounting seat is provided at the tail end of the side beam, and the rear swing arm mounting seat includes a front plate and a rear plate, and an upper combined rib is arranged on the top surface of the lower cross beam to connect the front plate and the rear suspension bushing, and a rear body bushing is arranged at the head end and the tail end of the lower cross beam, and a lower combined rib is arranged in the inner wall of the lower cross beam to connect the rear body bushing and the rear suspension bushing.

2. According to claim 1, the rear subframe of a new energy vehicle combined with internal reinforcement ribs is characterized by: The side beam comprises a left side beam and a right side beam, a middle beam is arranged between the left side beam and the right side beam, and the middle beam and the lower cross beam are arranged adjacent to each other.

3. According to claim 2, the rear subframe of a new energy vehicle combined with internal reinforcement ribs is characterized by: The head end and the tail end of the middle beam are provided with a central bushing connected to the bottom or inner side of the side beam, and the central bushing is provided with a middle reinforcement rib extending from the central bushing to the middle beam.

4. The rear subframe of a new energy vehicle combined with internal reinforcement ribs according to claim 1 is characterized in that: The surface of the lower cross beam is also provided with side composite ribs between the rear suspension bushing and the rear swing arm mounting seat, the rear plate is connected with the side composite ribs, and the side composite ribs and the upper composite ribs are not arranged in parallel.

5. The rear subframe of a new energy vehicle combined with internal reinforcement ribs according to claim 2 is characterized in that: A plurality of weight-reducing grooves with triangular structures are arranged at the bottom of the middle beam.

6. The rear subframe of a new energy vehicle combined with internal reinforcement ribs according to claim 1 is characterized in that: A pair of front motor fixing frames are arranged on the upper cross beam, and a U-shaped or O-shaped inner reinforcement rib is arranged in the inner wall of the front motor fixing frame of the upper cross beam.

7. The rear subframe of a new energy vehicle combined with internal reinforcement ribs according to claim 1 is characterized in that: The ring structure of the rear suspension bushing is hollowed out, and the interior of the beam body of the lower cross beam is hollowed out to provide a sand core positioning opening.

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