An electric vehicle frame chassis structure

Abstract

The utility model discloses a chassis structure of an electric vehicle frame, belonging to the technical field of electric vehicles. It includes longitudinal beams on both sides and multiple cross beams fixed between the two longitudinal beams; the longitudinal beams are integrally formed by stamping, and the middle part of the longitudinal beams has a "mouth" - shaped strengthening part; the multiple cross beams include two rear cross beams fixed at the rear ends of the longitudinal beams and middle cross beams fixed at the positions of the strengthening parts of the longitudinal beams; wherein, two leaf spring supports corresponding to the ends of the rear cross beams are further arranged at the rear end of each longitudinal beam, and the leaf spring supports are fixed integrally with the ends of the rear cross beams and the longitudinal beams. The end of the rear cross beam of the utility model is mutually fixed with the longitudinal beam and the leaf spring support through a connecting block, forming an integrated fixing structure. Through multiple connection methods of welding and riveting, the connection between the rear cross beam and the longitudinal beam, as well as between the leaf spring and the rear wheel assembly, is made more firm, improving the overall stability of the chassis structure.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and particularly relates to a chassis structure of an electric vehicle frame. Background Technique

[0002] As a green and environment-friendly means of transportation, electric vehicles have developed rapidly in recent years. As the core bearing component of an electric vehicle, the performance of the chassis structure directly affects the safety, stability and comfort of the electric vehicle.

[0003] In the existing chassis structure of an electric vehicle frame, the longitudinal beam and the cross beam are generally fixed by welding; the longitudinal beam is generally divided into two parts, the front and the rear, and a strengthening connection structure is arranged in the middle; the disadvantages of this structure are as follows:

[0004] During the long-term driving of the vehicle, under the action of various forces generated by complex road conditions, the connection parts are prone to looseness or even deformation; especially the connection parts between the longitudinal beam and the leaf spring and the rear wheel assembly are the most likely to loosen;

[0005] The longitudinal beam is formed by segmented welding, and stress concentration is easy to occur at the welding joints, resulting in excessive local stress in the longitudinal beam when it is stressed, and accelerating the fatigue damage of the material. Content of the Utility Model

[0006] The purpose of the utility model is to provide a chassis structure of an electric vehicle frame, which uses an integrated longitudinal beam and an integrated fixed connection structure to improve the strength of the chassis.

[0007] The utility model adopts the following technical scheme: a chassis structure of an electric vehicle frame, including longitudinal beams on both sides and a plurality of cross beams fixed between the two longitudinal beams;

[0008] The longitudinal beam is integrally formed by stamping, and the middle part of the longitudinal beam has a "mouth" - shaped strengthening part;

[0009] The plurality of cross beams include two rear cross beams fixed at the rear ends of the longitudinal beams and a middle cross beam fixed at the position of the strengthening part of the longitudinal beam;

[0010] Wherein, at the rear end of each longitudinal beam, two leaf spring supports corresponding to the ends of the rear cross beam are further arranged, and the leaf spring supports are fixed integrally with the ends of the rear cross beam and the longitudinal beam.

[0011] Preferably: the cross section of the longitudinal beam is "U" - shaped, and the "U" - shaped openings of the two longitudinal beams face each other.

[0012] Preferably: a connection block is fixed at the end of the rear cross beam, the connection block is embedded in the "U" - shaped opening of the longitudinal beam, and the leaf spring support is fixed integrally with the connection block and the longitudinal beam.

[0013] Preferably, the upper and lower ends of the connecting block are in contact with the inner walls of the upper and lower sides of the longitudinal beam;

[0014] The leaf spring support abuts against the lower side of the longitudinal beam and is vertically opposite to the connecting block; a reinforcing plate is provided on the outer side of the leaf spring support and is fitted to the outer side of the longitudinal beam.

[0015] Preferably, the upper side of the connecting block is riveted and fixed to the upper side of the longitudinal beam, and the lower side of the connecting block, the lower side of the longitudinal beam and the leaf spring support are riveted and fixed together.

[0016] Preferably, the reinforcing plate of the leaf spring support is riveted and fixed to the outer side of the longitudinal beam.

[0017] Preferably, the rear cross beam is of a cylindrical structure, the end of the rear cross beam passes through the outer sides of the connecting block and the longitudinal beam, and the rear cross beam is welded and fixed to the outer sides of the connecting block and the longitudinal beam respectively;

[0018] A bayonet is provided on the reinforcing plate of the leaf spring support, and the end of the rear cross beam is inserted into the bayonet of the reinforcing plate.

[0019] Preferably, the plurality of cross beams further include two front cross beams fixed to the front end of the longitudinal beam.

[0020] Preferably, the longitudinal beam includes a front longitudinal beam connected to the front side of the reinforcing part and a rear longitudinal beam connected to the rear side of the reinforcing part; the front longitudinal beam is flush with the lower side edge of the reinforcing part, and the rear longitudinal beam is flush with the upper side edge of the reinforcing part.

[0021] Preferably, two middle cross beams are provided, and the two middle cross beams are respectively connected to the upper and lower side edges of the reinforcing part and are vertically opposite to each other.

[0022] The beneficial effects of the present utility model are as follows:

[0023] The end of the rear cross beam is mutually fixed to the longitudinal beam and the leaf spring support through the connecting block, forming an integrated fixing structure. Through multiple connection methods of welding and riveting, the connection between the rear cross beam and the longitudinal beam, as well as between the leaf spring and the rear wheel assembly, is made more firm, effectively bearing various forces generated during vehicle driving, reducing the risk of loosening and deformation at the connection part, and improving the overall stability of the chassis structure;

[0024] The longitudinal beam is integrally formed by stamping, ensuring the integrity and consistency of the longitudinal beam, reducing stress concentration and structural defects that may be brought by connection processes such as welding; there is a "mouth" - shaped reinforcing part in the middle of the longitudinal beam, improving the bending and torsional strength of the longitudinal beam, and the reinforcing part adopts an arc transition at the corner, avoiding stress concentration, and improving the fatigue life and reliability of the longitudinal beam. Brief Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a perspective view of an electric vehicle frame chassis structure provided in an embodiment of the present utility model.

[0027] Figure 2 This is a front view of an electric vehicle frame chassis structure provided in an embodiment of the present utility model.

[0028] Figure 3 This is a top view of an electric vehicle frame chassis structure provided in an embodiment of the present utility model.

[0029] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0030] Figure 5 for Figure 4 Exploded view of the connection between the middle and rear crossbeams, longitudinal beams, and leaf spring supports.

[0031] Figure 6 for Figure 1 Enlarged view of point B in the middle.

[0032] Explanation of reference numerals in the attached drawings: 1. Longitudinal beam; 11. Front longitudinal beam; 12. Reinforcing section; 13. Rear longitudinal beam; 2. Rear crossbeam; 21. Connecting block; 3. Middle crossbeam; 4. Front crossbeam; 5. Leaf spring support; 51. Reinforcing plate; 6. Rivet. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Embodiment 1:

[0036] As Figures 1 to 3 shown, the present utility model provides an electric vehicle frame chassis structure. An electric vehicle frame chassis structure includes two parallel longitudinal beams 1, and a plurality of cross beams are fixedly connected between the two longitudinal beams 1. Among them, two rear cross beams 2 are fixed at the rear ends of the two longitudinal beams 1, and leaf spring supports 5 are arranged at positions on the longitudinal beams opposite to the ends of the rear cross beams 2. The leaf spring supports 5 are used for installing leaf springs and rear wheel assemblies.

[0037] Combined with Figure 4 and Figure 5 shown, in this embodiment, the longitudinal beam 1 has an upper side surface, an outer side surface and a lower side surface. The cross section of the longitudinal beam 1 is in a "U" shape, and the "U" - shaped openings of the two longitudinal beams are opposite to each other. A connecting block 21 is fixed at the end of the rear cross beam 2, and the connecting block 21 is also in a "U" shape. The connecting block 21 is embedded in the "U" - shaped opening of the longitudinal beam, so that the upper and lower side surfaces of the connecting block 21 contact the inner walls of the upper and lower side surfaces of the longitudinal beam, and the "U" - shaped opening of the connecting block 21 is opposite to the "U" - shaped opening of the longitudinal beam.

[0038] The rear cross beam 2 is of a cylindrical structure. The end of the rear cross beam 2 passes through the connecting block 21 and the outer side surface of the longitudinal beam. The end of the rear cross beam 2 protrudes from the outer side surface of the longitudinal beam, and the rear cross beam 2 is fixedly welded to the connecting block 21 and the outer side surface of the longitudinal beam respectively.

[0039] The upper end of the leaf spring support 5 abuts against the lower side surface of the longitudinal beam and is vertically opposite to the connecting block 21. The outer side of the leaf spring support 5 has a reinforcing plate 51, and a triangular rib is also welded between the reinforcing plate 51 and the leaf spring support 5. The reinforcing plate 51 is fitted on the outer side surface of the longitudinal beam, and a bayonet is formed at the upper side of the reinforcing plate 51. The protruding part of the end of the rear cross beam 2 is inserted into the bayonet of the reinforcing plate 51.

[0040] In this embodiment, the upper side surface of the connecting block 21 and the upper side surface of the longitudinal beam are riveted and fixed by a rivet 6. The lower side surface of the connecting block 21, the lower side surface of the longitudinal beam and the leaf spring support 5 are riveted together by a rivet 6, and the reinforcing plate 51 of the leaf spring support 5 and the outer side surface of the longitudinal beam are riveted and fixed by a rivet 6. Avoidance grooves are formed at both ends of the connecting block 21 to facilitate the installation of the rivet 6.

[0041] Embodiment 2:

[0042] Based on the above Embodiment 1, combined with Figures 1 to 3 , and Figure 6 shown, in this embodiment, the longitudinal beam is integrally formed by stamping. The middle part of the longitudinal beam has a "mouth" - shaped reinforcing part 12, and the corners of the reinforcing part 12 are transitioned by arcs. The front part of the reinforcing part 12 of the longitudinal beam is a front longitudinal beam 11, and the rear part is a rear longitudinal beam 13. The front longitudinal beam 11 is flush with the lower side of the reinforcing part 12, and the rear longitudinal beam 13 is flush with the upper side of the reinforcing part 12.

[0043] Two central crossbeams 3 are provided between the two reinforcements on both sides, and the two central crossbeams 3 are respectively connected to the upper and lower sides of the reinforcement 12. As described in Embodiment 1, the ends of the central crossbeams 3 are also fixedly connected to the longitudinal beams through connecting blocks 21, the difference being that the ends of the central crossbeams 3 are not provided with leaf spring supports 5.

[0044] Example 3:

[0045] Based on the above embodiment one, combined with Figures 1 to 3 As shown, two front crossbeams 4 are fixed to the front end of the front longitudinal beam 11. The front crossbeams 4 are used to connect the front fork and the front wheel assembly.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An electric vehicle frame chassis structure, including longitudinal beams (1) on both sides and multiple cross beams fixed between the two longitudinal beams (1); It is characterized in that: The longitudinal beam (1) is integrally formed by stamping, and the middle part of the longitudinal beam (1) has a "mouth" - shaped strengthening part (12); The multiple cross beams include two rear cross beams (2) fixed at the rear end of the longitudinal beam (1), and middle cross beams (3) fixed at the position of the strengthening part (12) of the longitudinal beam (1); Among them, at the rear end of each longitudinal beam (1), two leaf spring supports (5) corresponding to the ends of the rear cross beam (2) are further provided, and the leaf spring supports (5) are fixed integrally with the ends of the rear cross beam (2) and the longitudinal beam (1).

2. The electric vehicle frame chassis structure according to claim 1, characterized in that: The cross - section of the longitudinal beam (1) is in a "U" shape, and the "U" - shaped openings of the two longitudinal beams (1) face each other.

3. The electric vehicle frame chassis structure according to claim 2, characterized in that: A connecting block (21) is fixed at the end of the rear cross beam (2), the connecting block (21) is embedded in the "U" - shaped opening of the longitudinal beam (1), and the leaf spring support (5) is fixed integrally with the connecting block (21) and the longitudinal beam (1).

4. The electric vehicle frame chassis structure according to claim 3, characterized in that: The upper and lower ends of the connecting block (21) contact the inner walls of the upper and lower sides of the longitudinal beam (1); The leaf spring support (5) abuts against the lower side of the longitudinal beam (1) and is vertically opposite to the connecting block (21); a strengthening plate (51) is provided on the outer side of the leaf spring support (5) and fits on the outer side of the longitudinal beam (1).

5. The electric vehicle frame chassis structure according to claim 4, characterized in that: The upper side of the connecting block (21) is riveted and fixed to the upper side of the longitudinal beam (1), and the lower side of the connecting block (21), the lower side of the longitudinal beam (1) and the leaf spring support (5) are riveted and fixed together.

6. The electric vehicle frame chassis structure according to claim 4, characterized in that: The strengthening plate (51) of the leaf spring support (5) is riveted and fixed to the outer side of the longitudinal beam (1).

7. The electric vehicle frame chassis structure according to claim 4, characterized in that: The rear cross beam (2) is of a cylindrical structure, the end of the rear cross beam (2) passes through the connecting block (21) and the outer side of the longitudinal beam (1), and the rear cross beam (2) is respectively welded and fixed to the connecting block (21) and the outer side of the longitudinal beam (1); A bayonet is provided on the strengthening plate (51) of the leaf spring support (5), and the end of the rear cross beam (2) is inserted into the bayonet of the strengthening plate (51).

8. The electric vehicle frame chassis structure according to claim 1, characterized in that: The multiple cross beams further include two front cross beams (4) fixed at the front end of the longitudinal beam (1).

9. The electric vehicle frame chassis structure according to claim 1, characterized in that: The longitudinal beam (1) includes a front longitudinal beam (11) connected to the front side of the strengthening part (12) and a rear longitudinal beam (13) connected to the rear side of the strengthening part (12); the front longitudinal beam (11) is flush with the lower side edge of the strengthening part (12), and the rear longitudinal beam (13) is flush with the upper side edge of the strengthening part (12).

10. The electric vehicle frame chassis structure according to claim 9, characterized in that: There are two middle cross beams (3), and the two middle cross beams (3) are respectively connected to the upper and lower side edges of the strengthening part (12) and are vertically opposite to each other.

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