Front auxiliary frame

Abstract

The utility model relates to a front auxiliary frame which comprises a frame body and extension beams arranged on the left side and the right side of the front end of the frame body respectively, the extension beams extend front and back respectively, the left side and the right side of the front end of the frame body are provided with installation bases corresponding to the extension beams one to one respectively, and the installation bases are insertion grooves which extend front and back and are provided with forward openings. In a state that each extension beam is inserted into the corresponding mounting seat, along the length direction of each extension beam, the part from the rear end to the middle part of each extension beam is inclined outwards relative to the frame body, and the part from the middle part to the front end of each extension beam is inclined inwards; the inner side of the rear end of each extension beam abuts against the inner side wall of the corresponding installation base inside and outside, and the extension beams are fixed to the corresponding installation bases through fasteners. When the extension beam is damaged due to collision of a vehicle, only the extension beam needs to be replaced, the whole auxiliary frame does not need to be replaced, and the maintenance cost of the vehicle is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile chassis parts, especially to a front subframe. BACKGROUND

[0002] From the whole vehicle structure, the front subframe is an important automobile chassis part, which can provide installation supports and spaces required for installation for suspension parts, steering parts, engine suspension parts, etc., so there are various requirements for the performance of the front subframe, such as strength, modal, stiffness, fatigue, and collision safety. For example, the Chinese invention patent "Front subframe and vehicle" with the application number CN202411346511.9 (publication number CN119037548A) and the Chinese invention patent "Front subframe and vehicle" with the application number CN202411212427.8 (publication number CN118850186A) and the like. Further, the left and right sides of the rear end of the front subframe are respectively connected with front and rear extending extension beams, which can transmit relevant energy to the front subframe when the vehicle collides, and then the front subframe transmits the energy to the floor longitudinal beam of the vehicle body.

[0003] However, the extension beam and the front subframe in the prior art are generally integrally formed, so when the extension beam is damaged due to the collision of the vehicle, the whole front subframe needs to be replaced, greatly increasing the maintenance cost of the vehicle. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a front subframe which does not need to be replaced as a whole when the extension beam on it is damaged.

[0005] The utility model adopts the technical scheme for solving the above technical problem: a front subframe, which comprises a frame body and extension beams respectively arranged on the left and right sides of the front end of the frame body, each extension beam extends front and rear, characterized in that the left and right sides of the front end of the frame body are respectively provided with mounting seats corresponding to the above-mentioned extension beams one by one, each mounting seat is a front and rear extending and front opening slot, and the rear end of the corresponding extension beam is respectively inserted into each mounting seat,

[0006] Furthermore, in the state that each extension beam is inserted into the corresponding mounting seat, along the length direction of each extension beam, the rear end to the middle part of each extension beam respectively inclines outward relative to the frame body, and the middle part to the front end inclines inward, and the inner side of the rear end part of each extension beam respectively abuts against the inner side wall of the mounting seat, and is fixed to the corresponding mounting seat through a fastener.

[0007] Further, the outer side wall of each mounting seat is hollow and respectively communicates with the slot on the front side thereof, so that the front end part of each extension beam is inserted into the corresponding mounting seat from the outside to the inside relative to the frame body, thereby facilitating the disassembly and assembly of each extension beam and the frame body.

[0008] Further, the frame body comprises an upper plate and a lower plate arranged along horizontal direction respectively, and is formed by welding the upper plate and the lower plate together,

[0009] Each mounting seat comprises an upper mounting plate and a lower mounting plate arranged along horizontal direction, wherein the rear end of the upper mounting plate is fixedly welded with the upper plate, the rear end of the lower mounting plate is fixedly welded with the lower plate, the inner side of the front end of the upper mounting plate has an upper extension plate extending vertically, the inner side of the front end of the lower mounting plate has a lower extension plate extending vertically, and the upper end of the lower extension plate is overlapped with the lower end of the upper extension plate and fixedly welded to form the inner side wall of the mounting seat. On the one hand, each mounting seat is firmly fixed on the frame body, and on the other hand, the internal structure of each mounting seat is firm, which is beneficial to firmly install each extension beam on the frame body through the corresponding mounting seat.

[0010] Further, the left and right sides of the front end of the upper plate are respectively vertically flanged downward along the length direction to form upper welding vertical edges, the rear end of each upper mounting plate is respectively raised upward along the left and right direction, and the inner side of each upper mounting plate is respectively vertically flanged downward along the length direction, and the outer side of each upper mounting plate is respectively flanged upward along the length direction,

[0011] Further, the left and right sides of the front end of the upper plate are respectively vertically flanged downward along the length direction to form upper welding vertical edges, the rear end of each upper mounting plate is respectively raised upward along the left and right direction, and the inner side of each upper mounting plate is respectively vertically flanged downward along the length direction, and the outer side of each upper mounting plate is respectively flanged upward along the length direction,

[0012] Further, the left and right sides of the front end of the lower plate are respectively vertically flanged upward along the length direction to form lower welding vertical edges, and each lower welding vertical edge is fixedly welded with the upper welding vertical edge of the corresponding side along the length direction,

[0013] Further, the left and right sides of the front end of the lower plate are respectively vertically flanged upward along the length direction to form lower welding vertical edges, and each lower welding vertical edge is fixedly welded with the upper welding vertical edge of the corresponding side along the length direction,

[0014] Further, the top wall of each mounting seat is provided with a first mounting hole, and the bottom wall of each mounting seat is provided with a second mounting hole, and the second mounting hole is vertically opposite to the first mounting hole in the mounting seat,

[0015] And the front end of the top wall of each extension beam is provided with a third mounting hole corresponding to the first mounting hole, and the front end of the bottom wall is provided with a fourth mounting hole corresponding to the second mounting hole and vertically opposite to the third mounting hole. Each extension beam is a hollow structure, and a first sleeve for the rod of a fastener to pass through is fixed in the front end of each extension beam along the spacing direction of the third mounting hole and the fourth mounting hole. The first sleeve supports the fastener, so that the front end of each extension beam and the corresponding mounting seat form a firm connection.

[0016] Further, the top wall of each mounting seat has an upwardly protruding upper boss, and the bottom wall has a downwardly protruding lower boss. Each first mounting hole is provided on the upper boss of the corresponding mounting seat, and each second mounting hole is provided on the lower boss of the corresponding mounting seat. This can increase the strength of the connection between each mounting seat and the corresponding extension beam, forming a more secure connection between the two.

[0017] Further, each extension beam is a hollow structure, and an upper groove is recessed on the top wall of the middle part of each extension beam along the length direction, and a lower groove is recessed on the bottom wall along the length direction, which is vertically opposite to the upper groove. By providing an upper groove and a lower groove on each extension beam, the effect of actively guiding the collapse can be achieved, forming a more reasonable energy-absorbing deformation and achieving the effect of rigidity and flexibility.

[0018] Further, the rear end of each extension beam is provided with a connection site for connecting with the crash beam. Each connection site includes a first connection hole provided on the top wall of the rear end of the extension beam and a second connection hole provided on the bottom wall of the rear end, which is vertically opposite to the first connection hole. Each extension beam is a hollow structure, and a second sleeve for the rod of a fastener to pass through is fixed in the rear end of each extension beam along the spacing direction of the first connection hole and the second connection hole. The rear end of each extension beam is used to connect with the crash beam, and the above design can form a firm connection between each extension beam and the crash beam.

[0019] Further, each extension beam includes an upper beam plate and a lower beam plate extending along the length direction, and is formed by vertically splicing and welding the upper beam plate and the lower beam plate. The left and right sides of the upper beam plate are respectively vertically downwardly flanged along the length direction to form upper welding edges, and the left and right sides of the lower beam plate are respectively vertically upwardly flanged along the length direction to form lower welding edges. Each upper welding edge overlaps and is fixed with the corresponding lower welding edge vertically, and the front side edge of each lower beam plate vertically extends upwardly to shield the rear end of the extension beam. This is conducive to enhancing the overall rigidity of each extension beam and reducing the risk of damage due to vehicle collision.

[0020] Compared with the prior art, the utility model discloses the advantages lie in: the left and right sides of the front end of the frame body are provided with the mounting seat respectively, each mounting seat is the slot of forwardly open and extends forward, and the rear end of corresponding extension beam is inserted respectively, the rear end of each extension beam is respectively with the inside wall of the installation seat in the state of being inserted in the corresponding mounting seat and is fixed with the corresponding mounting seat through the fastener respectively, so that each extension beam and the frame body form the stable detachable connection, not only can guarantee the reliability of each extension beam and the frame body connecting structure, and when the extension beam is damaged due to the collision of the vehicle, only needs to replace the extension beam, does not need to replace the whole auxiliary frame, greatly reduces the maintenance cost of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structural schematic diagram of the front auxiliary frame in the utility model embodiment;

[0022] Figure 2 It is the structural schematic diagram of the front auxiliary frame in the utility model embodiment; Figure 1 It is the structural schematic diagram in another direction.

[0023] Figure 3 It is the structural schematic diagram of the front auxiliary frame in the utility model embodiment; Figure 2 It is the enlarged view of part A;

[0024] Figure 4 It is the structural schematic diagram of the extension beam in the utility model embodiment;

[0025] Figure 5 It is the structural exploded view of the extension beam in the utility model embodiment;

[0026] Figure 6 It is the partial structural schematic diagram of the front auxiliary frame in the utility model embodiment (in the state of hiding one side extension beam);

[0027] Figure 7 It is the structural schematic diagram in another direction. Figure 6 DETAILED DESCRIPTION

[0028] The utility model will be described further in detail below in combination with the embodiment of the accompanying drawings.

[0029] ​In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0030] like Figures 1 to 7 As shown, a front subframe includes a frame body 1 and extension beams 2 respectively disposed on the left and right sides of the front end of the frame body 1, with each extension beam 2 extending forward and backward. Mounting seats 3 are respectively disposed on the left and right sides of the front end of the frame body 1, corresponding to the extension beams 2 one-to-one. Each mounting seat 3 is a slot extending forward and backward with an opening facing forward, and is used for inserting the rear end of the corresponding extension beam 2. Furthermore, when each extension beam 2 is inserted into its corresponding mounting seat 3, along the length direction of each extension beam 2, the rear end to its middle portion is inclined outward relative to the frame body 1, while the middle portion to its front end is inclined inward. The inner side of the rear end portion of each extension beam 2 abuts against the inner sidewall of its respective mounting seat 3, and is fixed to the corresponding mounting seat 3 by fasteners (specifically bolts in this embodiment).

[0031] As can be seen from the above, in this utility model, mounting seats 3 are respectively provided on the left and right sides of the front end of the frame 1. Each mounting seat 3 is a slot that extends forward and backward and opens forward, and is used for the insertion of the rear end of the corresponding extension beam 2. When each extension beam 2 is inserted into the corresponding mounting seat 3, the inner side of the rear end of each extension beam 2 abuts against the inner side wall of the mounting seat 3, and is fixed to the corresponding mounting seat 3 by fasteners. This allows each extension beam 2 to form a stable and detachable connection with the frame 1, which not only ensures the reliability of the connection structure between each extension beam 2 and the frame 1, but also, if the extension beam 2 is damaged due to a vehicle collision, it can be removed from the frame 1 and replaced, without replacing the entire subframe, greatly reducing vehicle maintenance costs. Furthermore, with each extension beam 2 inserted into its corresponding mounting base 3, along the length direction of each extension beam 2, the rear end to the middle part of each extension beam 2 is inclined outward relative to the frame 1, while the middle part to the front end is inclined inward, thereby enabling each extension beam 2 to better transfer energy to the front subframe.

[0032] Preferably, as shown in Figure 1 and Figure 2 , the outer side wall of each mounting seat 3 is hollowed out and communicates with the notch in front of it, so that the front end of each extension beam 2 is inserted into the corresponding mounting seat 3 from the outside to the inside relative to the frame 1, thereby facilitating the disassembly and assembly of each extension beam 2 and the frame 1.

[0033] In this embodiment, specifically, the frame 1 includes an upper plate 11 and a lower plate 12 arranged in the horizontal direction, and is formed by welding the upper plate 11 and the lower plate 12 together. Each mounting seat 3 includes an upper mounting plate 31 and a lower mounting plate 32 arranged in the horizontal direction, wherein the rear end of the upper mounting plate 31 is welded and fixed to the upper plate 11, and the rear end of the lower mounting plate 32 is welded and fixed to the lower plate 12. The inner side of the front end of the upper mounting plate 31 has a vertically extending upper extension plate 311, and the inner side of the front end of the lower mounting plate 32 has a vertically extending lower extension plate 321. The upper end of the lower extension plate 321 is overlapped with the lower end of the upper extension plate 311 and is welded and fixed to form the inner side wall of the corresponding mounting seat 3, as shown in Figure 6 and Figure 7 . On the one hand, each mounting seat 3 is firmly fixed to the frame 1, and on the other hand, the internal structure of each mounting seat 3 is firm, which facilitates the firm installation of each extension beam 2 to the frame 1 through the corresponding mounting seat 3.

[0034] Further, specifically, the left and right sides of the front end of the upper plate 11 are vertically folded downward along the length direction to form upper welding vertical edges 111, the rear end of each upper mounting plate 31 is raised upward along the left and right directions, and the inner side is vertically folded downward along the length direction, and the outer side is folded upward along the length direction. Moreover, the rear end of each upper mounting plate 31 is covered on the corresponding side of the front end of the upper plate 11, and the rear end of each upper mounting plate 31 is inclined backward relative to the frame 1 from the inside to the outside, as shown in Figure 6 . Thus, a firm connection is formed between each upper mounting plate 31 and the frame 1, which facilitates the mounting seat 3 to be more firmly fixed to the front end of the frame 1, and can avoid cracking at the connection between the mounting seat 3 and the frame 1 when subjected to bending load.

[0035] Further, specifically, the left and right sides of the front end of the upper plate 11 are vertically folded downward along the length direction to form upper welding vertical edges 111, the rear end of each upper mounting plate 31 is raised upward along the left and right directions, and the inner side is vertically folded downward along the length direction, and the outer side is folded upward along the length direction. Moreover, the rear end of each upper mounting plate 31 is covered on the corresponding side of the front end of the upper plate 11, and the rear end of each upper mounting plate 31 is inclined backward relative to the frame 1 from the inside to the outside, as shown in Figure 7The first mounting hole 33 and the second mounting hole 34 are arranged on the top wall and the bottom wall of the mounting seat 3 respectively, and the second mounting hole 34 is vertically opposite to the first mounting hole 33. The third mounting hole 23 and the fourth mounting hole 24 are arranged on the top wall and the bottom wall of the extension beam 2 respectively, and the fourth mounting hole 24 is vertically opposite to the third mounting hole 23. The first sleeve 4 is arranged on the front end of the extension beam 2, and the rod of the fastener is arranged in the first sleeve 4. The first sleeve 4 supports the fastener, so that the front end of the extension beam 2 and the corresponding mounting seat 3 are firmly connected.

[0036] Further, the top wall of each mounting seat 3 is provided with a first mounting hole 33, and the bottom wall is provided with a second mounting hole 34 vertically opposite to the first mounting hole 33. The top wall of the front end of each extension beam 2 is provided with a third mounting hole 23 corresponding to the first mounting hole 33, and the bottom wall of the front end is provided with a fourth mounting hole 24 corresponding to the second mounting hole 34 and vertically opposite to the third mounting hole 23. Each extension beam 2 is a hollow structure, and the front end of each extension beam 2 is fixed with a first sleeve 4 for the rod of the fastener in the direction of the distance between the third mounting hole 23 and the fourth mounting hole 24. The first sleeve 4 supports the fastener, so that the front end of the extension beam 2 and the corresponding mounting seat 3 are firmly connected.

[0037] Preferably, the top wall of each mounting seat 3 has an upwardly protruding upper boss 3a, and the bottom wall has a downwardly protruding lower boss 3b. Each first mounting hole 33 is arranged on the upper boss 3a of the corresponding mounting seat 3, and each second mounting hole 34 is arranged on the lower boss 3b of the corresponding mounting seat 3. Thus, the strength of the connection between the mounting seat 3 and the corresponding extension beam 2 is increased, so that the two are more firmly connected.

[0038] Further, each extension beam 2 is a hollow structure, and the top wall of the middle part of each extension beam 2 is recessed with an upper groove 27 in the length direction, and the bottom wall is recessed with a lower groove 28 vertically opposite to the upper groove 27. By arranging the upper groove 27 and the lower groove 28 on each extension beam 2, the effect of actively guiding the collapse is achieved, so that the energy-absorbing deformation is more reasonable, and the effect of rigidity and flexibility is achieved.

[0039] Further, the rear end of each extension beam 2 is provided with a connection point 5 for connecting with a crash beam. Each connection point 5 includes a first connection hole 25 arranged on the top wall of the rear end of the extension beam 2 and a second connection hole 26 arranged on the bottom wall of the rear end. The second connection hole 26 is vertically opposite to the first connection hole 25. Each extension beam 2 is a hollow structure, and the rear end of each extension beam 2 is fixed with a second sleeve 6 for the rod of the fastener in the direction of the distance between the first connection hole 25 and the second connection hole 26. The rear end of each extension beam 2 is used to connect with the crash beam, and the connection between the extension beam 2 and the crash beam is firm through the above design.

[0040] Further, each of the above-mentioned extension beams 2 comprises an upper beam plate 21 and a lower beam plate 22 extending along the length direction thereof, and is formed by vertically splicing and welding the upper beam plate 21 and the lower beam plate 22. Moreover, the left and right sides of the upper beam plate 21 are respectively vertically downwardly flanged along the length direction to form upper welding edges 211, and the left and right sides of the lower beam plate 22 are respectively vertically upwardly flanged along the length direction to form lower welding edges 221, each of the upper welding edges 211 and the corresponding lower welding edge 221 are vertically overlapped and welded, and the front side edges of each of the lower beam plates 22 are respectively vertically upwardly extended to shield the rear end opening of the extension beam 2. This is advantageous to enhance the overall rigidity of each of the extension beams 2 and reduce the risk of damage due to vehicle collision.

Claims

1. A front subframe comprising a frame body (1) and left and right extension beams (2) provided at the left and right sides of the front end of the frame body (1), respectively, each of the extension beams (2) extending in the front-rear direction, characterized in that, The left and right sides of the front end of the frame body (1) are respectively provided with a mounting seat (3) corresponding to the above-mentioned extension beam (2), each mounting seat (3) is a slot extending forward and opening forward, and is respectively provided for the rear end of the corresponding extension beam (2), And in the state that each extension beam (2) is inserted into the corresponding mounting seat (3), the rear end of each extension beam (2) is inclined outward relative to the frame body (1) and the middle part to the front end is inclined inward along the length direction of each extension beam (2), and the inner side of the rear end of each extension beam (2) is respectively abutted with the inner side wall of the mounting seat (3) and is fixed with the corresponding mounting seat (3) by fasteners.

2. The front subframe according to claim 1, characterized by The outer side wall of each mounting seat (3) is hollow and communicates with the slot on the front side, so that the front end of each extension beam (2) is inserted into the corresponding mounting seat (3) from the outside to the inside relative to the frame body (1).

3. The front subframe of claim 1, wherein The frame body (1) comprises an upper plate (11) and a lower plate (12) arranged in the horizontal direction, and is welded after being spliced together by the upper plate (11) and the lower plate (12), Each mounting seat (3) comprises an upper mounting plate (31) and a lower mounting plate (32) arranged in the horizontal direction, wherein the rear end of the upper mounting plate (31) is welded and fixed with the upper plate (11), the rear end of the lower mounting plate (32) is welded and fixed with the lower plate (12), the inner side of the front end of the upper mounting plate (31) has a vertically extending upper extension plate (311), and the inner side of the front end of the lower mounting plate (32) has a vertically extending lower extension plate (321), the upper end of the lower extension plate (321) is overlapped with the lower end of the upper extension plate (311) and is welded and fixed to form the inner side wall of the corresponding mounting seat (3).

4. The front subframe of claim 3, wherein The left and right sides of the front end of the frame body (1) are respectively provided with a mounting seat (3) corresponding to the above-mentioned extension beam (2), each mounting seat (3) is a slot extending forward and opening forward, and is respectively provided for the rear end of the corresponding extension beam (2), And in the state that each extension beam (2) is inserted into the corresponding mounting seat (3), the rear end of each extension beam (2) is inclined outward relative to the frame body (1) and the middle part to the front end is inclined inward along the length direction of each extension beam (2), and the inner side of the rear end of each extension beam (2) is respectively abutted with the inner side wall of the mounting seat (3) and is fixed with the corresponding mounting seat (3) by fasteners.

5. The front subframe of claim 4, wherein The left and right sides of the front end of the frame body (1) are respectively provided with a mounting seat (3) corresponding to the above-mentioned extension beam (2), each mounting seat (3) is a slot extending forward and opening forward, and is respectively provided for the rear end of the corresponding extension beam (2), The left and right sides of the front end of the frame body (1) are respectively provided with a mounting seat (3) corresponding to the above-mentioned extension beam (2), each mounting seat (3) is a slot extending forward and opening forward, and is respectively provided for the rear end of the corresponding extension beam (2), 6. The front subframe according to any one of claims 1 to 5, characterized in that, The top wall of each mounting seat (3) is respectively provided with a first mounting hole (33), and the bottom wall is respectively provided with a second mounting hole (34), the second mounting hole (34) is vertically opposite to the first mounting hole (33) on the mounting seat (3), The top wall of each extension beam (2) is provided with a third mounting hole (23) corresponding to the first mounting hole (33), and the bottom wall is provided with a fourth mounting hole (24) corresponding to the second mounting hole (34) and vertically opposite to the third mounting hole (23). Each extension beam (2) is a hollow structure, and a first sleeve (4) for the rod of a fastener is fixed in the front end of each extension beam (2) along the spacing direction of the third mounting hole (23) and the fourth mounting hole (24).

7. The front subframe of claim 6, wherein The top wall of each mounting seat (3) has an upwardly protruding upper boss (3a), and the bottom wall has a downwardly protruding lower boss (3b). Each first mounting hole (33) is provided on the upper boss (3a) of the mounting seat (3), and each second mounting hole (34) is provided on the lower boss (3b) of the mounting seat (3).

8. The subframe according to any one of claims 1 to 5, characterized in that Each extension beam (2) is a hollow structure, and the top wall of the middle part of each extension beam (2) is recessed in the length direction to form an upper groove (27), and the bottom wall is recessed in the length direction to form a lower groove (28) vertically opposite to the upper groove (27).

9. The subframe according to any one of claims 1 to 5, characterized in that The rear end of each extension beam (2) is provided with a connection site (5) for connecting with a crash beam. Each connection site (5) includes a first connection hole (25) provided in the top wall of the rear end of the extension beam (2) and a second connection hole (26) provided in the bottom wall of the rear end. The second connection hole (26) is vertically opposite to the first connection hole (25). Each extension beam (2) is a hollow structure, and a second sleeve (6) for the rod of a fastener is fixed in the rear end of each extension beam (2) along the spacing direction of the first connection hole (25) and the second connection hole (26).

10. The subframe according to any one of claims 1 to 5, characterized in that Each extension beam (2) includes an upper beam plate (21) and a lower beam plate (22) extending in the length direction, and is formed by vertically welding the upper beam plate (21) and the lower beam plate (22) together. The left and right sides of the upper beam plate (21) are respectively vertically downwardly flanged in the length direction to form upper welding edges (211), and the left and right sides of the lower beam plate (22) are respectively vertically upwardly flanged in the length direction to form lower welding edges (221). Each upper welding edge (211) and the corresponding lower welding edge (221) are vertically overlapped and welded. The front side edge of each lower beam plate (22) is vertically upwardly extended to cover the rear end of the extension beam (2).

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