Full-frame type auxiliary frame and auxiliary frame assembly

Abstract

The full-frame type auxiliary frame comprises a cross beam, a left longitudinal beam and a right longitudinal beam, the cross beam is connected between the left longitudinal beam and the right longitudinal beam, the cross beam comprises an integrated cross beam lower piece and two cross beam upper pieces, the two cross beam upper pieces are connected to the upper wall face of the cross beam lower piece, the two cross beam upper pieces are arranged in the extending direction of the longitudinal beams, and the two cross beam lower pieces are connected to the upper wall face of the cross beam lower piece. A protruding part protruding upwards is arranged at the position, close to the middle, of the lower beam piece, and a sunken structure extending downwards is arranged at the position, close to the middle, of the protruding part. According to the full-frame type auxiliary frame, the square-shaped structure of a traditional full-frame type auxiliary frame is changed, the cross beam is of an integral structure, the structural stability of the auxiliary frame is improved, and the structural performance parameters such as the dynamic rigidity, the static rigidity and the strength durability of the auxiliary frame are improved; meanwhile, the mode of the full-frame type auxiliary frame can be improved through the structural design form of the cross beam lower piece, the NVH performance of the whole vehicle is improved, and the full-frame type auxiliary frame has more excellent structural performance and can meet the multi-configuration requirement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a full-frame auxiliary frame and an auxiliary frame assembly. BACKGROUND

[0002] With the increasing market demand and user differentiation demand, the vehicle auxiliary frame needs to meet the multi-configuration demand, but the full-frame auxiliary frame in the prior art includes two cross beams and two longitudinal beams, and the two cross beams and the two longitudinal beams form a mouth-shaped structure, which limits the improvement of the structural performance of the auxiliary frame, such as dynamic stiffness, static stiffness, modal and strength durability, etc., so that it cannot meet the demand of higher configuration.

[0003] Therefore, how to provide a full-frame auxiliary frame to improve its structural performance and meet the multi-configuration demand is a technical problem that technicians in the field need to solve urgently. SUMMARY

[0004] The purpose of the present application is to provide a full-frame auxiliary frame and an auxiliary frame assembly to improve its structural performance and meet the multi-configuration demand.

[0005] To solve the above technical problems, the present application provides a full-frame auxiliary frame, which comprises a cross beam, a left longitudinal beam and a right longitudinal beam, the cross beam is connected between the left longitudinal beam and the right longitudinal beam, the cross beam comprises an integral cross beam lower sheet and two cross beam upper sheets, the two cross beam upper sheets are connected to the upper wall surface of the cross beam lower sheet and are located on both sides of the width direction of the cross beam lower sheet, the cross beam lower sheet is provided with a protruding portion protruding upward at a position close to the middle portion, and the protruding portion is provided with a recess structure extending downward at a position close to the middle portion.

[0006] The full-frame auxiliary frame of the present application changes the mouth-shaped structure of the traditional full-frame auxiliary frame, the cross beam comprises an integral cross beam lower sheet and two cross beam upper sheets connected to the upper wall surface of the cross beam lower sheet, that is, the cross beam adopts an integral structure, increases the transverse size of the cross beam, increases the connection area of the cross beam and the longitudinal beam, improves the structural stability of the full-frame auxiliary frame of the present application, and further improves the structural performance parameters such as dynamic stiffness, static stiffness and strength durability of the full-frame auxiliary frame of the present application; at the same time, the structure of the cross beam lower sheet is not a whole plane, which meets the steering machine assembly space and the stamping process, and a protruding portion protruding upward is arranged at a position close to the middle portion of the cross beam lower sheet, and a recess structure extending downward is arranged at a position close to the middle portion of the protruding portion, the recess structure forms a steering machine mounting space for mounting the steering machine, and it has been verified that this structure design form can improve the modal of the full-frame auxiliary frame, and is more conducive to improving the vehicle NVH performance.

[0007] Compared with the traditional full-frame auxiliary frame with the structure of the oral font, the full-frame auxiliary frame has more excellent structural performance, can meet the configuration requirements of multiple configurations, such as four-wheel drive vehicle configuration requirements, two-wheel drive vehicle configuration requirements, and has high generalization degree and cost performance.

[0008] Optionally, the left longitudinal beam and the right longitudinal beam each comprise a longitudinal beam lower sheet, a front longitudinal beam upper sheet and a rear longitudinal beam upper sheet, the front longitudinal beam upper sheet is connected to the upper wall surface of the longitudinal beam lower sheet and is close to the front end of the longitudinal beam lower sheet, and the rear longitudinal beam upper sheet is connected to the upper wall surface of the longitudinal beam lower sheet and is close to the rear end of the longitudinal beam lower sheet.

[0009] A connecting space is formed between the front longitudinal beam upper sheet and the longitudinal beam lower sheet, the outer side of the connecting space is an open side, the connecting space is used for connecting a front lower control arm, and the rear longitudinal beam upper sheet and the longitudinal beam lower sheet form a closed structure in the circumferential direction.

[0010] Optionally, the corresponding regions of the rear longitudinal beam upper sheet and the longitudinal beam lower sheet jointly form a longitudinal beam rear end, the full-frame auxiliary frame further comprises a first stabilizer bar connecting piece, the first stabilizer bar connecting piece is arranged at the longitudinal beam rear end, and the first stabilizer bar connecting piece is used for connecting a stabilizer bar.

[0011] Optionally, the first stabilizer bar connecting piece comprises two stabilizer bar connecting sleeves and a connecting support, the stabilizer bar connecting sleeves are installed between the front longitudinal beam upper sheet and the longitudinal beam lower sheet, the two stabilizer bar connecting sleeves are distributed in the longitudinal direction, the axial two ends of the connecting support and the corresponding stabilizer bar connecting sleeves are fixed through connecting pieces, the middle part of the connecting support is protruded in a direction away from the front longitudinal beam upper sheet, and a clamping hole is formed between the connecting support and the front longitudinal beam upper sheet.

[0012] Optionally, the longitudinal beam lower sheet is provided with a front control arm connecting hole and a rear control arm connecting hole at a position region surrounding the connecting space, and the longitudinal beam further comprises a reinforcing plate, the reinforcing plate is connected to the corresponding position of the front control arm connecting hole of the longitudinal beam lower sheet, the reinforcing plate has a connecting hole, and the connecting hole and the rear control arm connecting hole are through.

[0013] Optionally, the rear longitudinal beam upper sheet is provided with a bending structure which is concave downward or protrudes upward, and the bending structure extends in the transverse direction.

[0014] Optionally, two first middle tower structures are further included, one of the first middle tower structures is connected at the joint of the cross beam and the left longitudinal beam, and the other of the first middle tower structures is connected at the joint of the cross beam and the right longitudinal beam, the first middle tower structure extends upward, the first middle tower structure is connected with a front vehicle body connecting piece, a second stabilizer connecting piece and a front suspension cross beam connecting piece, the front vehicle body connecting piece is used for connecting with a vehicle body, the second stabilizer connecting piece is used for connecting a stabilizer, and the front suspension cross beam connecting piece is used for connecting a front suspension cross beam.

[0015] Optionally, the front vehicle body connecting piece is a circumferentially broken tubular structure, an outer diameter of the front vehicle body connecting piece includes a large diameter section and a small diameter section, an end wall of the large diameter section is provided with a hobbing structure, the front vehicle body connecting piece extends in a vertical direction when connected to the first middle tower structure, and the large diameter section is closer to an upper end than the small diameter section.

[0016] Optionally, two second middle tower structures are further included, one of the second middle tower structures is connected at the joint of the cross beam and the left longitudinal beam, and the other of the second middle tower structures is connected at the joint of the cross beam and the right longitudinal beam, the second middle tower structure extends upward, and the second middle tower structure is connected with a front vehicle body connecting piece, the front vehicle body connecting piece is used for connecting with a vehicle body.

[0017] Optionally, rear ends of the left longitudinal beam and the right longitudinal beam are further connected with a rear vehicle body connecting piece, and the rear vehicle body connecting piece is used for connecting with a vehicle body.

[0018] Optionally, the rear vehicle body connecting piece includes a first vehicle body connecting piece and a second vehicle body connecting piece, the first vehicle body connecting piece is a tubular structure, an outer diameter of the first vehicle body connecting piece includes a large diameter section and a small diameter section, an end wall of the large diameter section is provided with a hobbing structure, a step wall is formed between the large diameter section and the small diameter section, the second vehicle body connecting piece has an axial through hole, a first end wall of the second vehicle body connecting piece is provided with the hobbing structure,

[0019] In a mounted state, the small diameter section passes through the left longitudinal beam or the right longitudinal beam in a vertical direction, the step wall abuts against a lower wall surface or an upper wall surface of the left longitudinal beam, or the step wall abuts against a lower wall surface or an upper wall surface of the right longitudinal beam, a second end wall of the second vehicle body connecting piece abuts against the upper wall surface or the lower wall surface of the left longitudinal beam, or the second end wall of the second vehicle body connecting piece abuts against the upper wall surface or the lower wall surface of the right longitudinal beam, the second end wall of the second vehicle body connecting piece is fixedly connected with the small diameter section, and the axial through hole of the second vehicle body connecting piece and the inner hole of the first vehicle body connecting piece are through.

[0020] Optionally, front ends of the left longitudinal beam and the right longitudinal beam are further provided with an energy absorption box connecting plate, and the energy absorption box connecting plate is used for connecting an energy absorption box.

[0021] The application also provides a subframe assembly, comprising the full-frame subframe mentioned above, and a battery protection crossbeam extending in the transverse direction, two ends of the battery protection crossbeam being connected to the lower side walls of the lower pieces of the longitudinal beams of the full-frame subframe.

[0022] The subframe assembly of the application comprises the full-frame subframe mentioned above, and thus has the same technical effects as the full-frame subframe mentioned above, which will not be described here again.

[0023] Optionally, the subframe assembly further comprises a front suspension crossbeam extending in the transverse direction, two ends of the front suspension crossbeam being connected to the corresponding first center tower structures, the front suspension crossbeam being configured to connect a motor.

[0024] Optionally, the subframe assembly further comprises a stabilizer extending in the transverse direction, two ends of the stabilizer being connected to the corresponding first center tower structures.

[0025] Optionally, the front suspension crossbeam comprises a crossbeam body provided with two upper-end-opened connecting grooves distributed in the axial direction of the crossbeam body,

[0026] the front suspension crossbeam further comprises two mounting sleeves and two connecting bushings, the connecting bushings being mounted in the corresponding mounting sleeves, the mounting sleeves being mounted in the corresponding connecting grooves, the connecting bushings being configured to connect a motor.

[0027] Optionally, the front suspension crossbeam further comprises two or more compressor supports connected to the upper side of the crossbeam body, the two or more compressor supports being distributed in the axial direction of the crossbeam body, the compressor supports being configured to connect a compressor.

[0028] Optionally, the front suspension crossbeam further comprises a PTC support connected to the upper side of the crossbeam body, the PTC support being configured to connect a PTC element.

[0029] Optionally, the subframe assembly further comprises a stabilizer extending in the transverse direction, the stabilizer being connected to the rear ends of the longitudinal beams of the full-frame subframe.

[0030] Optionally, the subframe assembly further comprises two front lower control arms located outside the corresponding longitudinal beams of the full-frame subframe, connecting ends of the front lower control arms being at least partially connected in the corresponding connecting spaces.

[0031] Optionally, the subframe assembly further comprises two energy absorption boxes connected to the front ends of the corresponding longitudinal beams of the full-frame subframe through energy absorption box connecting plates. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1Structure diagram of a first embodiment of the full-frame auxiliary frame provided by the present application;

[0033] Figure 2 Structure diagram of a second embodiment of the full-frame auxiliary frame provided by the present application;

[0034] Figure 3 For Figure 2 Split view of the full-frame auxiliary frame;

[0035] Figure 4 For Figure 1 And Figure 2 Split view of the cross beam in the full-frame auxiliary frame;

[0036] Figure 5 For Figure 4 Longitudinal sectional view of the cross beam;

[0037] Figure 6 Structure diagram of a first embodiment of the auxiliary frame assembly provided by the present application;

[0038] Figure 7A For Figure 6 Structure diagram of the auxiliary frame assembly with the front suspension cross beam removed;

[0039] Figure 7B For Figure 6 Structure diagram of the auxiliary frame assembly with the steering engine and the stabilizer removed;

[0040] Figure 8 For Figure 7A Structure diagram of a second angle;

[0041] Figure 9 Structure diagram of a second embodiment of the auxiliary frame assembly provided by the present application;

[0042] Figure 10 For Figure 1 Split view of the longitudinal beam in the full-frame auxiliary frame;

[0043] Figure 11 For Figure 9 Local enlarged view of the longitudinal beam in the auxiliary frame assembly at the stabilizer fixing position;

[0044] Figure 12 For Figure 1 And Figure 2 Longitudinal sectional view of the longitudinal beam in the full-frame auxiliary frame;

[0045] Figure 13 For Figure 1 Diagram of the first tower structure in the full-frame auxiliary frame;

[0046] Figure 14 For Figure 13The first middle tower structure in the stable rod fixed state structure diagram;

[0047] Figure 15 For Figure 1 And Figure 2 Full frame type auxiliary frame in the middle of the front body connecting piece structure diagram;

[0048] Figure 16 For Figure 15 Front body connecting piece and the body connecting process in a state diagram;

[0049] Figure 17 For Figure 2 Full frame type auxiliary frame in the second middle tower structure structure diagram;

[0050] Figure 18 For Figure 1 And Figure 2 Full frame type auxiliary frame in the rear body connecting piece structure diagram;

[0051] Figure 19 For Figure 18 Rear body connecting piece in the first body connecting piece structure diagram;

[0052] Figure 20 For Figure 18 Rear body connecting piece in the second body connecting piece structure diagram;

[0053] Figure 21 For Figure 6 And Figure 9 Auxiliary frame assembly in the energy absorption box structure diagram;

[0054] Figure 22 For Figure 8 Auxiliary frame assembly in the front suspension beam structure diagram;

[0055] Figure 23 For Figure 22 Front suspension beam second angle structure diagram;

[0056] Figure 24 For Figure 22 Front suspension beam third angle structure diagram;

[0057] Figure 25 For Figure 22 Front suspension beam body diagram;

[0058] Figure 26 For Figure 6 And Figure 9 Auxiliary frame assembly in the front lower control arm first embodiment structure diagram;

[0059] Figure 27 For Figure 6 AndFigure 9 Structure diagram of the second embodiment of the front lower control arm in the sub-frame assembly;

[0060] Wherein, Figures 1-27 The reference signs in the drawings are explained as follows:

[0061] 1-full frame sub-frame;

[0062] 11-cross beam; 111-cross beam lower piece; 111a-protruding part; 111b-recess structure; 112-cross beam upper piece; 113-riveted nut; 114-projection welded nut; 115-steering gear mounting sleeve;

[0063] 12-left side rail; 12'-right side rail; 121-side rail lower piece; 121a-front control arm connecting hole; 121b-rear control arm connecting hole; 122-front side rail upper piece; 122a-notch; 123-rear side rail upper piece; 123a-bent structure; 12a-connecting space; 124-stiffening plate;

[0064] 13-first stabilizer bar connecting piece; 131-stabilizer bar connecting sleeve; 132-connecting bracket;

[0065] 14-first middle tower structure; 141-upper wall; 14a-through hole;

[0066] 15-front vehicle body connecting piece; 151-large diameter section; a-hobbing structure; 152-small diameter section;

[0067] 16-second stabilizer bar connecting piece;

[0068] 17-front suspension cross beam connecting piece;

[0069] 18-second middle tower structure; 181-middle tower front piece; 182-middle tower rear piece;

[0070] 19-rear vehicle body connecting piece; 191-first vehicle body connecting piece; 191a-step wall; 192-second vehicle body connecting piece; 192a-axial through hole;

[0071] 101-energy absorption box connecting plate;

[0072] 2-front suspension cross beam; 21-cross beam body; 21a-mounting groove; 22-mounting sleeve; 23-connecting bushing; 24-compressor support; 25-PTC support;

[0073] 3-stabilizer bar;

[0074] 4-front lower control arm;

[0075] 5-energy absorption box;

[0076] 6-battery protection cross beam;

[0077] 7-steering machine;

[0078] 01-body;

[0079] A-body connecting member. DETAILED DESCRIPTION

[0080] In order to make the skilled in the art better understand the technical solutions of the present application, the present application is further described in detail below in combination with the drawings and specific embodiments.

[0081] The "multiple" described herein is generally two or more; and when the "multiple" is used to represent the number of several components, it does not represent the mutual relationship in the number of the components.

[0082] In the present application, when the full-frame subframe 1 is installed on the vehicle body, the end close to the front of the vehicle is the "front end", the end close to the rear of the vehicle is the "rear end", the direction close to the roof of the vehicle is the "upper end", and the direction close to the bottom of the vehicle is the "lower end".

[0083] In this paper, the extension direction of the left side rail 12 and the right side rail 12' is "longitudinal"; the extension direction of the cross beam 11 is "transverse"; the side of the left side rail 12 and the right side rail 12' close to the cross beam 11 is "inner side"; the side of the left side rail 12 and the right side rail 12' away from the cross beam 11 is "outer side".

[0084] Please refer to Figures 1-5 , Figure 1 The structure diagram of the first specific embodiment of the full-frame subframe provided by the present application; Figure 2 The structure diagram of the second specific embodiment of the full-frame subframe provided by the present application; Figure 3 The structure diagram of the full-frame subframe; Figure 2 The structure diagram of the full-frame subframe; Figure 4 The sectional view of the cross beam in the full-frame subframe; Figure 1 And Figure 2 The sectional view of the cross beam in the full-frame subframe; Figure 5 The longitudinal sectional view of the cross beam; Figure 4 The longitudinal sectional view of the cross beam;

[0085] The present application provides a full-frame subframe 1, which comprises a cross beam 11, a left side rail 12 and a right side rail 12', the cross beam 11 is connected between the left side rail 12 and the right side rail 12', the cross beam 11 comprises an integral cross beam lower piece 111, and two cross beam upper pieces 112, the two cross beam upper pieces 112 are connected to the upper wall surface of the cross beam lower piece 111 and close to the two ends of the cross beam lower piece 111 in the width direction, the cross beam lower piece 111 is provided with a protruding portion 111a protruding upward at a position close to the middle, the protruding portion 111a is provided with a recess structure 111b extending downward at a position close to the middle, and the recess structure 111b can be used for installing a steering machine.

[0086] The full-frame auxiliary frame 1 changes the mouth-shaped structure of the traditional full-frame auxiliary frame, the cross beam 11 includes an integral cross beam lower sheet 111 and two cross beam upper sheets 112 connected to the upper wall surface of the cross beam lower sheet 111, that is, the cross beam 11 adopts an integral structure, the transverse size of the cross beam 11 is increased, the connecting area of the cross beam 11 and the two longitudinal beams is increased, the structural stability of the full-frame auxiliary frame 1 is improved, and then the dynamic stiffness, static stiffness and strength durability and other structural performance parameters of the full-frame auxiliary frame 1 are improved; at the same time, the structure of the cross beam lower sheet 111 is not a whole plane, a protruding portion 111a protruding upward is arranged at a position close to the middle of the cross beam lower sheet 111, a recess structure 111b extending downward is arranged at a position close to the middle of the protruding portion 111a, and it has been verified that this structure design form can improve the modal of the full-frame auxiliary frame 1 and is more beneficial to the improvement of the vehicle NVH performance.

[0087] Therefore, compared with the traditional full-frame auxiliary frame with a mouth-shaped structure, the full-frame auxiliary frame 1 has more excellent structural performance, can meet the configuration requirements of multiple configurations such as four-wheel drive vehicle configuration requirements, two-wheel drive vehicle configuration requirements, has a high degree of generalization, and has a higher cost performance. Among them, Figure 1 The full-frame auxiliary frame 1 shown in the first specific embodiment can meet the four-wheel drive vehicle configuration requirements, Figure 2 The full-frame auxiliary frame 1 shown in the second specific embodiment can meet the two-wheel drive vehicle configuration requirements.

[0088] As described above, the two cross beam upper sheets 112 are connected to the upper wall surface of the cross beam lower sheet 111. In practice, the cross beam upper sheet 112 and the cross beam lower sheet 111 can be fixed by welding.

[0089] As shown in Figure 4 The full-frame auxiliary frame 1 further includes a riveted nut 113, the riveted nut 113 is installed on the cross beam upper sheet 112 close to the front end, and is used to provide a mounting point for the wire harness pipeline of the vehicle.

[0090] In practice, the lower side wall of the full-frame auxiliary frame 1 is further connected with a protective plate (not shown in the figure), which plays a role in dustproof and waterproof. In order to install the protective plate, as shown in Figure 4 The full-frame auxiliary frame 1 further includes a riveted nut 114, the riveted nut 114 is installed on the cross beam lower sheet 111, and is used to provide a mounting point for the protective plate.

[0091] As described above, the recess structure 111b inside the cross beam 11 can be used to install a steering machine. Therefore, as shown in Figure 3As shown, the cross beam 11 further comprises a steering engine mounting sleeve 115 arranged on the lower piece 111 of the cross beam, which is used to fix the steering engine, and can be fixed in various ways. For example, the steering engine mounting sleeve 115 can be a threaded sleeve with internal threads, the steering engine has a connecting plate provided with a connecting hole, when the steering engine is placed in a predetermined mounting position, the connecting hole arranged on the connecting plate and the internal hole of the steering engine mounting sleeve 115 are through, and a threaded connecting piece passes through the connecting hole of the connecting plate from top to bottom and is screwed with the steering engine mounting sleeve 115 to realize the fixed installation of the steering engine. Alternatively, the steering engine mounting sleeve 115 is a common tubular structure, at this time, the threaded connecting piece passes through the connecting hole of the connecting plate and the internal hole of the steering engine mounting sleeve 115 in turn, and is fixed with a nut to realize the fixed installation of the steering engine.

[0092] Please refer to Figures 6-9 , Figure 6 for the structure schematic view of the first specific embodiment of the subframe assembly provided by the present application; Figure 7A for Figure 6 the structure schematic view of the subframe assembly without the front suspension cross beam; Figure 7B for Figure 6 the structure schematic view of the subframe assembly without the steering engine and the stabilizer bar; Figure 8 for Figure 7A the structure schematic view of the second angle; Figure 9 for the structure schematic view of the second specific embodiment of the subframe assembly provided by the present application.

[0093] It should be noted that, in order to make the drawing clearer, Figure 7A the front suspension cross beam 2 is omitted in the figure, Figure 7B the stabilizer bar 3 and the steering engine 7 are omitted in the figure, and the structure of the first embodiment of the subframe assembly can be completely understood in combination with Figure 7A and Figure 7B .

[0094] As shown in the figure, Figures 6-8 the first embodiment of the subframe assembly meets the configuration requirements of four-wheel drive vehicles, the full-frame subframe 1 serves as the main structure of the subframe assembly, and needs to integrate the front suspension cross beam 2, the steering engine 7 and the stabilizer bar 3, and the stabilizer bar 3 is installed in front, and the front suspension cross beam 2 and the stabilizer bar 3 are both installed on the center tower structure, and the center tower structure simultaneously realizes the connection between the subframe assembly and the vehicle body.

[0095] As shown in the figure, Figure 9 the second embodiment of the subframe assembly meets the configuration requirements of two-wheel drive vehicles, and the front suspension cross beam 2 is cancelled, the full-frame subframe 1 serves as the main structure of the subframe assembly, and needs to integrate the stabilizer bar 3 and the steering engine 7, and the stabilizer bar 3 is installed on the left longitudinal beam 12 and the right longitudinal beam 12', that is, the stabilizer bar 3 is installed in rear, and the center tower structure only realizes the connection between the subframe assembly and the vehicle body.

[0096] Therefore, in the four-wheel drive vehicle configuration and the two-wheel drive vehicle configuration, the structures of the longitudinal beams and the center tower of the full-frame auxiliary frame 1 are slightly different. Next, the structure and differences of the full-frame auxiliary frame 1 will be described in detail for the four-wheel drive vehicle configuration and the two-wheel drive vehicle configuration.

[0097] Please refer to Figure 1 , Figure 7A and Figure 10 , Figure 10 for Figure 1 the split view of the middle longitudinal beam of the full-frame auxiliary frame.

[0098] In the present application, the left longitudinal beam 12 and the right longitudinal beam 12' each include a longitudinal beam lower sheet 121, a front longitudinal beam upper sheet 122, and a rear longitudinal beam upper sheet 123. The front longitudinal beam upper sheet 122 is connected to the upper wall surface of the longitudinal beam lower sheet 121 and is close to the front end of the longitudinal beam lower sheet 121. The rear longitudinal beam upper sheet 123 is connected to the upper wall surface of the longitudinal beam lower sheet 121 and is close to the rear end of the longitudinal beam lower sheet 121. A connection space 12a is formed between the front longitudinal beam upper sheet 122 and the longitudinal beam lower sheet 121. The outer side of the connection space 12a is an open side, and the connection space 12a is used to connect the front lower control arm 4. The rear longitudinal beam upper sheet 123 and the longitudinal beam lower sheet 121 form a closed structure that is closed in the circumferential direction.

[0099] As described above, in the present application, the longitudinal beam upper sheet is provided as a split structure of the front longitudinal beam upper sheet 122 and the rear longitudinal beam upper sheet 123. The front longitudinal beam upper sheet 122 and the rear longitudinal beam upper sheet 123 are separately formed, which is convenient for processing. At the same time, in order to facilitate the installation of the front lower control arm 4, the outer side of the circumferential wall of the front longitudinal beam upper sheet 122 is provided with a notch 122a. When connected, at least part of the circumferential wall of the front longitudinal beam upper sheet 122 is connected to the longitudinal beam lower sheet 121, thereby realizing the relative fixation of the front longitudinal beam upper sheet 122 and the longitudinal beam lower sheet 121. A connection space 12a is formed between the front longitudinal beam upper sheet 122 and the longitudinal beam lower sheet 121. The notch position of the front longitudinal beam upper sheet 122 forms the outer side opening of the connection space 12a. The connection end of the front lower control arm 4 at least partially passes through the opening, is inserted into the connection space 12a, and is fixed with the longitudinal beam lower sheet 121 and / or the front longitudinal beam upper sheet 122. The rear longitudinal beam upper sheet 123 and the longitudinal beam lower sheet 121 form a closed structure that is closed in the circumferential direction, which is conducive to improving the connection stability of the rear longitudinal beam upper sheet 123 and the longitudinal beam lower sheet 121.

[0100] In practice, the front longitudinal beam upper sheet 122 and the longitudinal beam lower sheet 121 can be fixed by welding, and the rear longitudinal beam upper sheet 123 and the longitudinal beam lower sheet 121 can also be fixed by welding.

[0101] As shown in Figure 9 , in the two-wheel drive vehicle configuration, the stabilizer bar 3 is installed on the left longitudinal beam 12 and the right longitudinal beam 12'. Based on this, please refer to Figure 3 , Figure 9 andFigure 11 , Figure 11 For Figure 9 Partial enlarged view of the local position of the longitudinal beam in the subframe assembly at the fixing position of the stabilizer bar.

[0102] In this embodiment, the corresponding regions of the rear longitudinal beam upper plate 123 and the longitudinal beam lower plate 121 jointly form the rear end of the longitudinal beam, and the full-frame subframe 1 further comprises a first stabilizer bar connecting piece 13 arranged at the rear end of the longitudinal beam, which is used to connect the stabilizer bar 3 to achieve the rear installation of the stabilizer bar 3.

[0103] The first stabilizer bar connecting piece 13 comprises two stabilizer bar connecting sleeves 131 and a connecting bracket 132, the stabilizer bar connecting sleeves 131 are installed between the front longitudinal beam upper plate 122 and the longitudinal beam lower plate 121, the two stabilizer bar connecting sleeves 131 are distributed along the longitudinal direction, the axial two ends of the connecting bracket 132 and the corresponding stabilizer bar connecting sleeves 131 are fixed through connecting pieces, the middle part of the connecting bracket 132 protrudes away from the front longitudinal beam upper plate 122, and the connecting bracket 132 and the front longitudinal beam upper plate 122 form a clamping hole.

[0104] As arranged above, when installing the stabilizer bar 3, the connecting bracket 132 can be first detached, and the stabilizer bar 3 is placed at the preset installation position on the upper side of the front longitudinal beam upper plate 122, then the axial two ends of the connecting bracket 132 and the corresponding stabilizer bar connecting sleeves 131 are connected through connecting pieces, at this time, the stabilizer bar 3 is located inside the clamping hole formed between the connecting bracket 132 and the front longitudinal beam upper plate 122, and the fixed installation of the stabilizer bar 3 is realized. It can be seen that the structure of the first stabilizer bar connecting piece 13 in this embodiment can realize the reliable installation of the stabilizer bar 3, and has the advantages of simple structure, convenient installation and easy disassembly.

[0105] The stabilizer bar connecting sleeve 131 can be a threaded sleeve, that is, the inner wall of the stabilizer bar connecting sleeve 131 is provided with internal threads, the connecting piece can be a threaded connecting piece such as a screw, the axial two ends of the connecting bracket 132 are correspondingly provided with connecting holes, and the front longitudinal beam upper plate 122 is provided with a through hole at the corresponding position of the stabilizer bar connecting sleeve 131, the through hole and the inner hole of the stabilizer bar connecting sleeve 131 are through, during installation, the connecting holes of the connecting bracket 132 and the corresponding through holes of the front longitudinal beam upper plate 122 are through, the threaded connecting piece is sequentially threaded through the connecting holes of the connecting bracket 132 and the corresponding through holes of the front longitudinal beam upper plate 122, and is screwed with the threaded sleeve to realize the fixation of the connecting bracket 132 and the front longitudinal beam upper plate 122.

[0106] Of course, in practice, the stabilizer connecting sleeve 131 can also be a common tubular structure, that is, its inner wall is not provided with internal threads, the connecting piece includes a connecting bolt and a fixing nut, the connecting bracket 132 is provided with connecting holes at both axial ends thereof, the front upper longitudinal beam piece 122 and the lower longitudinal beam piece 121 are provided with through holes at corresponding positions of the stabilizer connecting sleeve 131, the through hole provided on the front upper longitudinal beam piece 122 is defined as a first through hole, and the through hole provided on the lower longitudinal beam piece 121 is defined as a second through hole, the first through hole and the second through hole are in communication with the inner hole of the stabilizer connecting sleeve 131, during installation, the connecting holes of the connecting bracket 132 and the first through hole are in communication, the connecting bolt is sequentially inserted into the first through hole, the stabilizer connecting sleeve 131 and the second through hole from top to bottom, and is threadedly connected with the fixing nut, so as to fix the connecting bracket 132 and the front upper longitudinal beam piece 122. Alternatively, the connecting bolt can be sequentially inserted into the second through hole, the stabilizer connecting sleeve 131 and the first through hole from bottom to top, and is threadedly connected with the fixing nut, so as to fix the connecting bracket 132 and the front upper longitudinal beam piece 122.

[0107] Please continue to refer to Figure 3 In the present application, the lower longitudinal beam piece 121 is provided with a front control arm connecting hole 121a and a rear control arm connecting hole 121b at a position region surrounding the connecting space 12a, and the left longitudinal beam 12 and the right longitudinal beam 12' further include a reinforcing plate 124, the reinforcing plate 124 is connected to a corresponding position of the rear control arm connecting hole 121b of the lower longitudinal beam piece 121, and the reinforcing plate 124 has a connecting hole in communication with the rear control arm connecting hole 121b.

[0108] In engineering practice, it is found that the front lower control arm 4 and the corresponding left longitudinal beam 12 or right longitudinal beam 12' have higher requirements for structural strength at the position of the rear control arm connecting hole 121b, therefore, the present application adds the reinforcing plate 124 at the corresponding position of the rear control arm connecting hole 121b, so as to improve the structural strength of the left longitudinal beam 12 and the right longitudinal beam 12', and ensure the reliable connection of the front lower control arm 4 and the left longitudinal beam 12 or the right longitudinal beam 12'.

[0109] In practice, the reinforcing plate 124 can be connected to the lower wall surface of the lower longitudinal beam piece 121, or can be connected to the upper wall surface of the lower longitudinal beam piece 121, of course, the reinforcing plate 124 connected to the lower wall surface of the lower longitudinal beam piece 121 does not occupy the installation space of the front lower control arm 4, which is a more preferred technical solution.

[0110] In practice, the reinforcing plate 124 and the lower longitudinal beam piece 121 can be fixed by welding.

[0111] It can be understood that, in Figure 1 As shown in the full-frame auxiliary frame 1 meeting the configuration requirements of the four-wheel drive vehicle, the left longitudinal beam 12 and the right longitudinal beam 12' also include the aforementioned reinforcing plate 124.

[0112] Please refer to Figure 12, Figure 12 For Figure 1 And Figure 2 Longitudinal section view of the longitudinal beam in the full-frame subframe.

[0113] In the full-frame subframe 1 of the present application, the rear longitudinal beam upper piece 123 is provided with a downwardly recessed bending structure 123a, which extends in the transverse direction, i.e., in the width direction of the rear longitudinal beam upper piece 123.

[0114] In practice, when the full-frame subframe 1 is installed on the whole vehicle, the battery pack is located at the rear end of the left longitudinal beam 12 and the right longitudinal beam 12', in order to prevent the whole vehicle from being directly impacted by a large force when the whole vehicle is subjected to a large force impact, and the force is directly transmitted to the battery pack through the left longitudinal beam 12 and the right longitudinal beam 12', causing damage to the battery pack and even explosion. In this embodiment, the rear longitudinal beam upper piece 123 is provided with a downwardly recessed bending structure 123a, and the bending structure 123a extends in the transverse direction. In this way, the rear longitudinal beam upper piece 123 is prone to deformation at the bending structure 123a, i.e., the structural strength of the rear longitudinal beam upper piece 123 is weakened, and the structural strength of the whole rear end of the longitudinal beam is further weakened. When the whole vehicle is subjected to a large force impact, the rear end of the longitudinal beam can deform to absorb part of the impact energy, thereby playing a protective role for the battery pack.

[0115] In this embodiment, the bending structure 123a provided on the rear longitudinal beam upper piece 123 is downwardly recessed. In practice, the bending structure 123a can also be upwardly protruding, which can also achieve the technical effect of weakening the structural strength of the rear longitudinal beam upper piece 123.

[0116] In addition, in practice, the overall modeling trend of the rear end of the longitudinal beam should be in line with the shape of the vehicle body, and the force can be better transmitted downward when subjected to stress.

[0117] As mentioned above, in the four-wheel drive vehicle configuration, the full-frame subframe 1 serves as the main structure of the subframe assembly, and needs to integrate the front suspension beam 2 and the stabilizer bar 3, and the stabilizer bar 3 is installed in front. Based on this, the full-frame subframe 1 further includes two first middle tower structures 14, which play a role in connecting the vehicle body, the front suspension beam 2 and the stabilizer bar 3.

[0118] Please refer to Figure 1 , Figures 13-14 , Figure 13 For Figure 1 Schematic view of the first middle tower structure in the full-frame subframe; Figure 14 Figure 13 Schematic view of the first middle tower structure in the fixed state of the stabilizer bar.

[0119] ​In the present application, the number of the first middle tower structures 14 is two, one of which is connected at the joint of the cross beam 11 and the left longitudinal beam 12, and the other is connected at the joint of the cross beam 11 and the right longitudinal beam 12', and the first middle tower structure 14 extends upward, and the first middle tower structure 14 is connected with the front vehicle body connecting piece 15, the second stabilizer connecting piece 16 and the front suspension cross beam connecting piece 17, the front vehicle body connecting piece 15 is used to connect with the vehicle body, the second stabilizer connecting piece 16 is used to connect the stabilizer 3, and the front suspension cross beam connecting piece 17 is used to connect the front suspension cross beam 2.

[0120] As arranged above, the full-frame auxiliary frame 1 has two first middle tower structures 14, which play a role in connecting the vehicle body, the front suspension cross beam 2 and the stabilizer 3, and meet the configuration requirements of four-wheel drive vehicles.

[0121] Please refer to Figures 15-16 , Figure 15 for Figure 1 and Figure 2 the structure diagram of the front vehicle body connecting piece in the full-frame auxiliary frame; Figure 16 for Figure 15 a certain state diagram of the front vehicle body connecting piece in the process of connecting with the vehicle body.

[0122] In the present embodiment, the front vehicle body connecting piece 15 is a tubular structure broken in the circumferential direction, the outer diameter of the front vehicle body connecting piece 15 includes a large-diameter section 151 and a small-diameter section 152, the end wall of the large-diameter section 151 is provided with a hobbing structure a, the front vehicle body connecting piece 15 extends in the vertical direction when connected to the first middle tower structure 14, and the large-diameter section 151 is closer to the upper end than the small-diameter section 152.

[0123] As arranged above, when the full-frame auxiliary frame 1 is connected to the vehicle body 01, the vehicle body connecting piece A passes through the inside of the front vehicle body connecting piece 15 from bottom to top and is connected to the corresponding connecting part of the vehicle body 01, thereby realizing the relative fixation of the full-frame auxiliary frame 1 and the vehicle body 01.

[0124] In addition, the front vehicle body connecting piece 15 is arranged as a tubular structure broken in the circumferential direction, which can reduce the structural strength of the front vehicle body connecting piece 15 and make it more likely to deform from the broken part, so that when the whole vehicle is subjected to a larger force collision, the front vehicle body connecting piece 15 can absorb the collision energy through deformation, so that less collision energy is transmitted to the full-frame auxiliary frame 1, thereby playing a role in protecting the rear battery pack and improving the crash performance of the whole vehicle; at the same time, when the front vehicle body connecting piece 15 is connected to the first middle tower structure 14, the large-diameter section 151 is closer to the upper end than the small-diameter section 152, and when the full-frame auxiliary frame 1 is connected to the vehicle body 01, the end wall of the large-diameter section 151 abuts against the corresponding end wall of the vehicle body 01, which can increase the contact area of the front vehicle body connecting piece 15 and the vehicle body 01, and increase the friction coefficient of the installation surface through the hobbing structure a arranged on the end wall of the large-diameter section 151, thereby ensuring the stable connection of the full-frame auxiliary frame 1.

[0125] The specific structure of the second stabilizer bar connecting piece 16 is similar to that of the first stabilizer bar connecting piece 13, and will not be described here.

[0126] Please continue to refer to Figure 13 , the front suspension cross beam connecting piece 17 includes a projection welding nut 114 arranged on the upper wall 141 of the first middle tower structure 14, the front suspension cross beam 2 has a first connecting part and a second connecting part, the first connecting part has a through hole, and when connected, the first connecting part is supported on the upper wall 141 of the first middle tower structure 14, the through hole of the first connecting part and the inner hole of the projection welding nut 114 are through, and the front suspension cross beam connecting piece 17 further includes a threaded connecting piece, which is threaded from bottom to top through the through hole of the first connecting part and is threaded with the projection welding nut 114, thereby realizing the relative fixation of the first middle tower structure 14 and the first connecting part of the front suspension cross beam 2.

[0127] Further, the first middle tower structure 14 is further provided with a through hole 14a extending through front and back, the second connecting part of the front suspension cross beam 2 has a through hole, when connected, the second connecting part is attached to the front wall of the front suspension cross beam 2, the through hole of the second connecting part and the through hole 14a of the first middle tower structure 14 are through, and the front suspension cross beam connecting piece 17 further includes a connecting bolt and a fixing nut, the connecting bolt is sequentially threaded through the through hole of the second connecting part and the through hole 14a of the first middle tower structure 14 from front to back, and is threaded with the fixing nut, thereby realizing the relative fixation of the first middle tower structure 14 and the second connecting part of the front suspension cross beam 2. Alternatively, the connecting bolt is sequentially threaded through the through hole 14a of the first middle tower structure 14 and the through hole of the second connecting part from back to front, and is threaded with the fixing nut, thereby realizing the relative fixation of the first middle tower structure 14 and the second connecting part of the front suspension cross beam 2.

[0128] As described above, in the two-drive vehicle configuration, the front suspension cross beam 2 is cancelled, the full-frame auxiliary frame 1 serves as the main structure of the auxiliary frame assembly, needs to integrate the stabilizer bar 3, and the stabilizer bar 3 is installed in a rear position. Based on this, the full-frame auxiliary frame 1 further includes two second middle tower structures 18, which only serve to connect the vehicle body.

[0129] Please refer to Figure 17 , Figure 17 To Figure 2 Schematic view of the second middle tower structure in the full-frame auxiliary frame.

[0130] In the present application, the number of the second middle tower structures 18 is two, one of which is connected at the connection between the cross beam 11 and the left longitudinal beam 12, and the other of which is connected at the connection between the cross beam 11 and the right longitudinal beam 12'. The second middle tower structures 18 extend upward, the two second middle tower structures 18 are distributed along the transverse direction, the second middle tower structures 18 are connected with front vehicle body connecting pieces 15, and the front vehicle body connecting pieces 15 are used to connect with the vehicle body.

[0131] As set forth above, the full-frame auxiliary frame 1 has two second center pillar structures 18, which play a role of connecting the vehicle body, meet the configuration requirements of two-wheel drive vehicle models, and cancel the front suspension beam mounting point, thereby reducing the height of the vehicle body mounting point and achieving the lightweight requirement of the overall weight of the auxiliary frame and the vehicle body.

[0132] The specific structure of the front vehicle body connecting piece 15 is as previously described and will not be repeated here.

[0133] As shown in Figure 3 , in the embodiment, the second center pillar structure 18 includes a center pillar front piece 181 and a center pillar rear piece 182, which are arranged along the front-rear direction and are fixed by welding to form at least part of the structure of the second center pillar structure 18.

[0134] It can be understood that, in practice, the first center pillar structure 14 also includes a center pillar front piece and a center pillar rear piece, which are fixed by welding to form at least part of the structure of the first center pillar structure 14.

[0135] Please continue to refer to Figures 18-20 , Figure 18 for Figure 1 and Figure 2 the structure of the rear vehicle body connecting piece in the full-frame auxiliary frame; Figure 19 for Figure 18 the structure of the first vehicle body connecting piece in the rear vehicle body connecting piece; Figure 20 for Figure 18 the structure of the second vehicle body connecting piece in the rear vehicle body connecting piece.

[0136] In the present application, the full-frame auxiliary frame 1 is further connected with a rear vehicle body connecting piece 19 at the rear end of the left and right longitudinal beams 12 and 12', and the rear vehicle body connecting piece 19 is used to connect with the vehicle body.

[0137] The rear vehicle body connecting piece 19 includes a first vehicle body connecting piece 191 and a second vehicle body connecting piece 192, the first vehicle body connecting piece 191 is of a tubular structure, the outer diameter of the first vehicle body connecting piece 191 includes a large-diameter section and a small-diameter section, the end wall of the large-diameter section is provided with a hobbing structure a, and a step wall 191a is formed between the large-diameter section and the small-diameter section, the second vehicle body connecting piece 192 has an axially-through hole 192a, and the first end wall of the second vehicle body connecting piece 192 is provided with a hobbing structure a;

[0138] In the mounted state, the small-diameter section passes through the left longitudinal beam 12 or the right longitudinal beam 12' in the vertical direction, the stepped wall 191a abuts against the lower wall surface or the upper wall surface of the left longitudinal beam 12, or the stepped wall 191a abuts against the lower wall surface or the upper wall surface of the right longitudinal beam 12', the second end wall of the second vehicle body connecting piece 192 abuts against the upper wall surface or the lower wall surface of the left longitudinal beam 12, or the second end wall of the second vehicle body connecting piece 192 abuts against the upper wall surface or the lower wall surface of the right longitudinal beam 12', the second end wall of the second vehicle body connecting piece 192 is fixedly connected with the small-diameter section of the first vehicle body connecting piece 191, and the axial through hole 192a of the second vehicle body connecting piece 192 penetrates the inner hole of the first vehicle body connecting piece 191.

[0139] It can be understood that, before the rear vehicle body connecting piece 19 is mounted on the left longitudinal beam 12 or the right longitudinal beam 12', the first vehicle body connecting piece 191 and the second vehicle body connecting piece 192 are in a split structure, and when mounted, the first vehicle body connecting piece 191 can be mounted from bottom to top or from top to bottom, specifically:

[0140] When the first vehicle body connecting piece 191 is mounted from bottom to top, the stepped wall 191a abuts against the lower wall surface of the left longitudinal beam 12 or the right longitudinal beam 12', the second end wall of the second vehicle body connecting piece 192 abuts against the upper wall surface of the left longitudinal beam 12 or the right longitudinal beam 12', and after the second end wall of the second vehicle body connecting piece 192 is fixedly connected with the small-diameter section of the first vehicle body connecting piece 191, the connection of the rear vehicle body connecting piece 19 with the left longitudinal beam 12 or the right longitudinal beam 12' is completed.

[0141] When the full-frame auxiliary frame 1 is connected to the vehicle body, the first end wall of the second vehicle body connecting piece 192 abuts against the corresponding end wall of the vehicle body, the gear rolling structure a arranged on the first end wall of the second vehicle body connecting piece 192 can increase the friction coefficient of the mounting surface, thereby ensuring the stable connection of the full-frame auxiliary frame 1, the connecting piece penetrates from bottom to top from the inside of the rear vehicle body connecting piece 19 and is connected to the vehicle body, the head of the connecting piece abuts against the end wall of the large-diameter section, and the gear rolling structure a arranged on the end wall of the large-diameter section can increase the friction coefficient of the abutting surface, thereby further improving the connection stability of the full-frame auxiliary frame 1.

[0142] When the first vehicle body connecting piece 191 is mounted from top to bottom, the stepped wall 191a abuts against the upper wall surface of the left longitudinal beam 12 or the right longitudinal beam 12', the second end wall of the second vehicle body connecting piece 192 abuts against the lower wall surface of the left longitudinal beam 12 or the right longitudinal beam 12', and after the second end wall of the second vehicle body connecting piece 192 is fixedly connected with the small-diameter section of the first vehicle body connecting piece 191, the connection of the rear vehicle body connecting piece 19 with the left longitudinal beam 12 or the right longitudinal beam 12' is completed.

[0143] When the full-frame auxiliary frame 1 is connected to the vehicle body, the end wall of the large-diameter section and the corresponding end wall of the vehicle body abut, the hobbing structure a arranged on the end wall of the large-diameter section can increase the friction coefficient of the mounting surface, ensure the stable connection of the full-frame auxiliary frame 1, the connecting piece passes through from bottom to top from the inside of the rear vehicle body connecting piece 19, and is connected with the vehicle body, the head of the connecting piece abuts against the first end wall of the second vehicle body connecting piece 192, and the hobbing structure a arranged on the first end wall of the second vehicle body connecting piece 192 can increase the friction coefficient of the abutting surface, and further improve the connection stability of the full-frame auxiliary frame 1.

[0144] In practice, the second end wall of the second vehicle body connecting piece 192 and the small-diameter section can be fixed by welding, and the connection is reliable.

[0145] Please continue to refer to Figure 21 , Figure 21 To Figure 6 and Figure 9 The structure diagram of the energy absorption box in the auxiliary frame assembly.

[0146] In the present application, the front end of the left longitudinal beam 12 and the right longitudinal beam 12' of the full-frame auxiliary frame 1 is further provided with an energy absorption box connecting plate 101, and the energy absorption box connecting plate 101 is used to connect the energy absorption box 5.

[0147] In the present application, the front end of the full-frame auxiliary frame 1 is provided with an energy absorption box connecting plate 101, and the energy absorption box 5 can be connected to the front end of the two longitudinal beams through the energy absorption box connecting plate 101, and under the action of the collision load, the energy absorption box 5 can play a role in collision deformation and energy absorption, so that the collision energy is less transmitted to the full-frame auxiliary frame 1, thereby playing a role in protecting the rear-end battery pack and improving the crash performance of the whole vehicle.

[0148] In practice, the energy absorption box 5 is provided with a connecting plate for connecting with the energy absorption box connecting plate 101, and in the connected state, the connecting plate and the energy absorption box connecting plate 101 are attached and fixed by a connecting piece or welded.

[0149] In practice, the main structure of the full-frame auxiliary frame 1, such as the cross beam 11, the left longitudinal beam 12, the right longitudinal beam 12' and other stamping parts, adopts stamping forming, and other sleeve structures such as the mounting sleeve adopt cold heading process.

[0150] In summary, the present application provides two different embodiments of the full-frame auxiliary frame 1, one of which can meet the configuration requirements of four-wheel drive vehicles, and the other of which can meet the configuration requirements of two-wheel drive vehicles, specifically:

[0151] In the full-frame auxiliary frame 1 meeting the configuration requirements of four-wheel drive vehicles, the full-frame auxiliary frame 1 comprises a first center tower structure 14, which plays a role in connecting the vehicle body, the front suspension cross beam 2 and the stabilizer bar 3, and realizes the front installation of the stabilizer bar 3.

[0152] In the full-frame auxiliary frame 1 meeting the configuration requirements of the two-wheel drive vehicle, the full-frame auxiliary frame 1 comprises a second center tower structure 18, the front suspension beam connecting member and the stabilizer bar connecting member are cancelled, the second center tower structure 18 only plays a role of connecting the vehicle body, the left longitudinal beam 12 and the right longitudinal beam 12' are provided with the first stabilizer bar connecting member 13, and rear installation of the stabilizer bar 3 is realized.

[0153] Please continue to refer to Figure 6 and Figure 9 , the application also provides an auxiliary frame assembly, comprising the full-frame auxiliary frame 1 and the battery protection beam 6, the battery protection beam 6 extends in the transverse direction, and two ends of the battery protection beam 6 are connected to the lower side wall of the longitudinal beam lower piece 121 of the full-frame auxiliary frame 1.

[0154] The auxiliary frame assembly comprises the full-frame auxiliary frame 1, and therefore has the same technical effects as the full-frame auxiliary frame 1, which will not be repeated here. Meanwhile, the battery protection beam 6 can prevent damage to the battery pack caused by foreign matters at the bottom.

[0155] As described above, the full-frame auxiliary frame 1 has two different structural forms, which can meet the configuration requirements of the four-wheel drive vehicle and the two-wheel drive vehicle respectively. Therefore, the auxiliary frame assembly also has two different structural forms. Next, the auxiliary frame assemblies with the two different structural forms will be described in detail.

[0156] As shown in Figure 6 , in the auxiliary frame assembly configured for the four-wheel drive vehicle, the auxiliary frame assembly further comprises the front suspension beam 2, the front suspension beam 2 extends in the transverse direction, and two ends of the front suspension beam 2 are connected to the corresponding first center tower structure 14. The front suspension beam 2 is configured to connect the motor.

[0157] Specifically, please refer to Figures 22-25 , Figure 22 for Figure 8 the structural schematic view of the front suspension beam in the auxiliary frame assembly; Figure 23 for Figure 22 the structural schematic view of the front suspension beam at a second angle; Figure 24 for Figure 22 the structural schematic view of the front suspension beam at a third angle; Figure 25 for Figure 22 the exploded view of the front suspension beam.

[0158] In this embodiment, the front suspension cross beam 2 specifically comprises a cross beam body 21, the cross beam body 21 is provided with two upper-end-opened mounting grooves 21a, the two mounting grooves 21a are distributed along the axial direction of the cross beam body 21, the front suspension cross beam 2 further comprises two mounting sleeves 22 and two connecting bushings 23, the connecting bushing 23 is installed inside the corresponding mounting sleeve 22, the mounting sleeve 22 is installed inside the corresponding mounting groove 21a, the connecting bushing 23 is used for connecting with the motor, so as to realize the stable installation of the motor.

[0159] Wherein, the mounting sleeve 22 and the cross beam body 21 can be fixed by welding, the connecting bushing 23 and the corresponding mounting sleeve 22 can be fixed by interference fit.

[0160] As shown in Figure 22 and Figure 25 , the front suspension cross beam 2 further comprises two compressor supports 24, the two compressor supports 24 are connected to the upper side of the cross beam body 21, the two compressor supports 24 are distributed along the axial direction of the cross beam body 21, the compressor support 24 is used for connecting the compressor.

[0161] Of course, in practice, the number of compressor supports 24 is not limited, in order to ensure the installation stability of the compressor, the number of compressor supports 24 can be more than two.

[0162] Further, the front suspension cross beam 2 further comprises a PTC (Positive Temperature Coefficient) support 25, the PTC support 25 is connected to the upper side of the cross beam body 21, the PTC support 25 is used for connecting the PTC element.

[0163] As shown in Figure 25 , the PTC support 25 has two legs, one of which is connected to the upper side wall of the cross beam body 21, and the other is connected to the mounting sleeve 22.

[0164] As shown in Figure 6 , the subframe assembly further comprises a stabilizer bar 3, in the subframe assembly configured for the four-wheel drive vehicle, the stabilizer bar 3 extends in the transverse direction, the two ends of the stabilizer bar 3 are connected to the corresponding first center tower structure 14, specifically, the two ends of the stabilizer bar 3 are connected to the corresponding first center tower structure 14 through the second stabilizer bar connecting piece 16, the foregoing has been described in detail, and will not be repeated here.

[0165] As shown in Figure 9 , in the subframe assembly configured for the two-wheel drive vehicle, the stabilizer bar 3 extends in the transverse direction, the two ends of the stabilizer bar 3 are connected to the longitudinal beam rear end of the full-frame subframe 1 through the first stabilizer bar connecting piece 13, the foregoing has been described in detail, and will not be repeated here.

[0166] Further, as shown in Figure 7A andFigure 9 As shown in the drawings, the subframe assembly of the present application further comprises two front lower control arms 4, one of which is located outside the left longitudinal beam 12 in the full-frame subframe 1, and the other is located outside the right longitudinal beam 12' in the full-frame subframe 1, and the connecting end of the front lower control arm 4 is at least partially connected in the corresponding connecting space 12a, and the front lower control arm 4 is used to realize the connection between the subframe assembly and the wheel.

[0167] Please refer to Figures 26-27 , Figure 26 For Figure 6 and Figure 9 The structure diagram of the first embodiment of the front lower control arm in the subframe assembly; Figure 27 For Figure 6 and Figure 9 The structure diagram of the second embodiment of the front lower control arm in the subframe assembly.

[0168] The present application provides two different materials of the front lower control arm 4, such as Figure 26 The material of the front lower control arm 4 is steel material, which saves cost on the basis of meeting the structural strength; such as Figure 27 The material of the front lower control arm 4 is aluminum material, which realizes lightweight on the basis of meeting the structural strength.

[0169] As can be seen, the full-frame subframe 1 of the present application can adapt to the front lower control arm 4 of different materials, and has stronger universality.

[0170] In addition, as shown in the drawings, Figure 21 The subframe assembly of the present application further comprises two energy absorption boxes 5, which are connected to the front ends of the left longitudinal beam 12 and the right longitudinal beam 12' through the energy absorption box connecting plate 101, and can deform and absorb energy in the collision, thereby playing the role of the front end barrier in the collision.

[0171] In practice, the subframe assembly of the present application is applicable to different suspension structures, such as the MacPherson suspension.

[0172] The full-frame subframe and the subframe assembly provided by the present application are described in detail above, and the principles and implementation modes of the present application are described by applying specific examples in this paper. The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A full-frame subframe, characterized by, The cross beam, the left side beam and the right side beam are provided, the cross beam is connected between the left side beam and the right side beam, the cross beam comprises an integral cross beam lower sheet and two cross beam upper sheets, the two cross beam upper sheets are connected to the upper wall surface of the cross beam lower sheet and are located on both sides of the cross beam lower sheet in the width direction, the cross beam lower sheet is provided with a protruding portion protruding upward at a position close to the middle portion, and the protruding portion is provided with a recess structure extending downward at a position close to the middle portion.

2. The full-frame subframe according to claim 1, characterized in that, The left side beam and the right side beam each comprise a side beam lower sheet, a front side beam upper sheet and a rear side beam upper sheet, the front side beam upper sheet is connected to the upper wall surface of the side beam lower sheet and is close to the front end of the side beam lower sheet, and the rear side beam upper sheet is connected to the upper wall surface of the side beam lower sheet and is close to the rear end of the side beam lower sheet, A connecting space is formed between the front side beam upper sheet and the side beam lower sheet, the outer side of the connecting space is an open side, the connecting space is used for connecting a front lower control arm, and the rear side beam upper sheet and the side beam lower sheet form a closed structure in the circumferential direction.

3. The full-frame subframe according to claim 2, characterized in that Corresponding regions of the rear side beam upper sheet and the side beam lower sheet jointly form a rear end of the side beam, the full-frame auxiliary frame further comprises a first stabilizer bar connecting piece, the first stabilizer bar connecting piece is arranged at the rear end of the side beam, and the first stabilizer bar connecting piece is used for connecting a stabilizer bar.

4. The full-frame subframe according to claim 3, characterized in that, The first stabilizer bar connecting piece comprises two stabilizer bar connecting sleeves and a connecting support, the stabilizer bar connecting sleeves are installed between the front side beam upper sheet and the side beam lower sheet, the two stabilizer bar connecting sleeves are distributed in the longitudinal direction, the axial two ends of the connecting support and the corresponding stabilizer bar connecting sleeves are fixed through a connecting piece, the middle portion of the connecting support protrudes away from the front side beam upper sheet, and a clamping hole is formed between the connecting support and the front side beam upper sheet.

5. The full-frame subframe according to claim 2 or 3, characterized in that, The side beam lower sheet is provided with a front control arm connecting hole and a rear control arm connecting hole at a position region surrounding the connecting space, and the side beam further comprises a reinforcing plate, the reinforcing plate is connected to a corresponding position of the rear control arm connecting hole of the side beam lower sheet, the reinforcing plate has a connecting hole, and the connecting hole and the rear control arm connecting hole are through holes.

6. The full-frame subframe according to claim 2 or 3, characterized in that, The rear side beam upper sheet is provided with a bending structure protruding downward or protruding upward, and the bending structure extends in the transverse direction.

7. The full-frame subframe of claim 2, wherein, The full-frame auxiliary frame further comprises two first middle tower structures, one first middle tower structure is connected at the connection between the cross beam and the left side beam, and the other first middle tower structure is connected at the connection between the cross beam and the right side beam, the first middle tower structure extends upward, and the first middle tower structure is connected with a front vehicle body connecting piece, a second stabilizer bar connecting piece and a front suspension cross beam connecting piece, the front vehicle body connecting piece is used for connecting a vehicle body, the second stabilizer bar connecting piece is used for connecting a stabilizer bar, and the front suspension cross beam connecting piece is used for connecting a front suspension cross beam.

8. The full-frame subframe according to claim 7, characterized in that The front vehicle body connecting piece is a tubular structure which is disconnected in the circumferential direction, the outer diameter of the front vehicle body connecting piece comprises a large-diameter section and a small-diameter section, the end wall of the large-diameter section is provided with a hobbing structure, the front vehicle body connecting piece extends in the vertical direction when the front vehicle body connecting piece is connected to the first middle tower structure, and the large-diameter section is closer to the upper end than the small-diameter section.

9. The full-frame subframe according to claim 3 or 4, characterized in that Two second middle tower structures are further included, one of the second middle tower structures is connected at the joint of the cross beam and the left longitudinal beam, and the other of the second middle tower structures is connected at the joint of the cross beam and the right longitudinal beam, the second middle tower structures extend upward, and front vehicle body connecting members are connected to the second middle tower structures, and the front vehicle body connecting members are used for connecting with a vehicle body.

10. The full-frame subframe according to any one of claims 1-4, characterized in that The rear ends of the left longitudinal beam and the right longitudinal beam are further connected with rear vehicle body connecting members, and the rear vehicle body connecting members are used for connecting with the vehicle body.

11. The full-frame subframe according to claim 10, characterized in that The rear vehicle body connecting members include first vehicle body connecting members and second vehicle body connecting members, the first vehicle body connecting members are tubular structures, the outer diameters of the first vehicle body connecting members include large-diameter sections and small-diameter sections, the end walls of the large-diameter sections are provided with hobbing structures, step walls are formed between the large-diameter sections and the small-diameter sections, the second vehicle body connecting members have axial through holes, and the first end walls of the second vehicle body connecting members are provided with the hobbing structures, In the mounted state, the small-diameter sections pass through the left longitudinal beam or the right longitudinal beam in the vertical direction, the step walls abut against the lower walls or the upper walls of the left longitudinal beam or the right longitudinal beam, the second end walls of the second vehicle body connecting members abut against the upper walls or the lower walls of the left longitudinal beam or the right longitudinal beam, the second end walls of the second vehicle body connecting members are fixedly connected with the small-diameter sections, and the axial through holes of the second vehicle body connecting members and the inner holes of the first vehicle body connecting members are through.

12. The full-frame subframe of any of claims 1-4, wherein, The front ends of the left longitudinal beam and the right longitudinal beam are further provided with energy-absorbing box connecting plates, and the energy-absorbing box connecting plates are used for connecting energy-absorbing boxes.

13. A subframe assembly characterized by, The full-frame auxiliary frame includes the full-frame auxiliary frame according to any one of claims 1-12, and a battery protection cross beam, the battery protection cross beam extends in the transverse direction, and two ends of the battery protection cross beam are connected to the lower side walls of the lower pieces of the longitudinal beams of the full-frame auxiliary frame.

14. The subframe assembly of claim 13, wherein, The full-frame auxiliary frame further includes a front suspension cross beam, the front suspension cross beam extends in the transverse direction, and two ends of the front suspension cross beam are connected to corresponding first middle tower structures, and the front suspension cross beam is configured to connect an electric machine. The full-frame auxiliary frame further includes a stabilizer, the stabilizer extends in the transverse direction, and two ends of the stabilizer are connected to corresponding first middle tower structures.

15. The subframe assembly of claim 14, wherein, The front suspension cross beam includes a cross beam body, the cross beam body is provided with two upper-end-opened connecting grooves, and the two connecting grooves are distributed in the axial direction of the cross beam body, The front suspension cross beam further includes two mounting sleeves and two connecting bushings, the connecting bushings are mounted in the mounting sleeves, the mounting sleeves are mounted in the connecting grooves, and the connecting bushings are used for connecting an electric machine.

16. The subframe assembly of claim 15, wherein The front suspension cross beam further includes two or more compressor supports, the compressor supports are connected to the upper side of the cross beam body, the two or more compressor supports are distributed in the axial direction of the cross beam body, and the compressor supports are used for connecting compressors. The front suspension cross beam further includes a PTC support, the PTC support is connected to the upper side of the cross beam body, and the PTC support is used for connecting a PTC element.

17. The subframe assembly of claim 13, wherein Further comprising a stabilizer bar extending in the transverse direction, the stabilizer bar being connected to the rear end of the longitudinal beam of the full-frame subframe.

18. The subframe assembly of any of claims 13-17, wherein, Further comprising two front lower control arms located outside the corresponding longitudinal beam of the full-frame subframe, the connecting end of the front lower control arm being at least partially connected in the corresponding connecting space.

19. The subframe assembly of any of claims 13-17, wherein, Further comprising two energy absorption boxes connected to the front end of the corresponding longitudinal beam of the full-frame subframe through an energy absorption box connecting plate.

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