Driving motor rear bracket and suspension system

Abstract

The invention relates to a rear bracket and suspension system for a driving motor, and the system comprises a front auxiliary frame which is a metal plate welding part and comprises an auxiliary frame body, and the left end of the auxiliary frame body is fixedly provided with a left front supporting arm and a left rear supporting arm which are used for connecting a left longitudinal beam assembly; a right front supporting arm and a right rear supporting arm which are used for being connected with a right longitudinal beam assembly are fixedly arranged at the right end of the auxiliary frame body. The rear suspension support is a sheet metal part which is integrally punched and formed and is welded in the middle of the front end of the auxiliary frame body, the rear suspension support comprises a left mounting plate, a right mounting plate and a connecting plate, the left mounting plate and the right mounting plate are parallel to each other and arranged at an interval, the connecting plate is connected between the left mounting plate and the right mounting plate, and flanges are arranged on the outer edges of the left mounting plate and the right mounting plate. According to the front auxiliary frame, a stamped and tailor-welded metal plate structure is adopted, functions are integrated, and the structure is light. The rear suspension support is a sheet metal part which is integrally punched and formed and is welded in the middle of the front end of the auxiliary frame body, and the structural design of the rear suspension support meets the modal and strength requirements of the suspension support.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicle suspension systems, and in particular to a rear bracket and suspension system for a drive motor. Background Art

[0002] The suspension system of an electric vehicle has the functions of isolating vibration, supporting and positioning the drive motor, protecting the drive motor, and overcoming the reaction force generated by the motor torque output; this requires that the components of the suspension system must have sufficient stiffness, strength, mode and reliability.

[0003] When an electric vehicle starts and accelerates, the motor torque changes greatly and reaches the maximum torque quickly, which will put a large impact load on the motor suspension system; when an electric drive vehicle encounters bad road conditions such as bumps and potholes, the motor suspension system will also be subjected to a large impact load; based on these characteristics, the suspension design of electric vehicles is quite different from that of fuel vehicles, requiring the suspension system to have not only sufficient rigidity and strength, but also effective limiting capabilities.

[0004] The unbalanced order frequency of the motor rotation is between 100 and 600 Hz, so the suspension bracket is required to have a higher mode to avoid resonance; and avoid the first and second order modes of the electric drive assembly, and avoid the modes of other systems in the vehicle.

[0005] Based on the above-mentioned technical characteristics of the electric vehicle suspension system, if the suspension system is improperly designed, faults such as damage to the suspension pad or breakage of the suspension bracket will often occur, affecting the durability and reliability of the suspension system, and thus affecting the durability and reliability of the entire vehicle.

[0006] In order to obtain higher modalities and strength, the suspension bracket and subframe usually adopt the design structure of castings, but the manufacturing cost of castings is high. It is difficult to design a structure with higher modalities and strength for sheet metal welded parts, so the requirements of modalities and strength cannot be met, which affects the reliability of the suspension system. Summary of the invention

[0007] The embodiment of the present application provides a drive motor rear bracket and suspension system to solve the problem in the related art that the suspension bracket and the subframe usually adopt a casting design structure in order to obtain a higher mode and strength, but the casting manufacturing cost is high.

[0008] A first aspect of an embodiment of the present application provides a rear bracket for a driving motor, comprising:

[0009] A front subframe, the front subframe is a sheet metal welded part, including a subframe body, a left front support arm and a left rear support arm for connecting the left longitudinal beam assembly are fixedly provided at the left end of the subframe body, and a right front support arm and a right rear support arm for connecting the right longitudinal beam assembly are fixedly provided at the right end of the subframe body;

[0010] A rear suspension bracket, which is an integrally stamped sheet metal part and is welded to the middle part of the front end of the sub-frame body. The rear suspension bracket includes a left mounting plate and a right mounting plate that are parallel to each other and spaced apart, and a connecting plate connected between the left mounting plate and the right mounting plate. The outer edges of the left mounting plate and the right mounting plate are both provided with flanges.

[0011] In some embodiments: a first mounting hole is formed on the left mounting plate, and a second mounting hole is formed on the right mounting plate. The first mounting hole and the second mounting hole have the same diameter and their centers are located on the same axis.

[0012] The flange on the left mounting plate is a left flange, and the flange on the right mounting plate is a right flange. The left flange is bent on the left mounting plate in a direction away from the right mounting plate, and the right flange is bent on the right mounting plate in a direction away from the left mounting plate.

[0013] In some embodiments: the right flange includes a first flange, a second flange, a third flange and a fourth flange located at the top of the right mounting plate and arranged sequentially from back to front, and a fifth flange, a sixth flange and a seventh flange located at the bottom of the right mounting plate and arranged sequentially from front to back;

[0014] The first flange, the second flange, the third flange, the fourth flange, the fifth flange, the sixth flange and the seventh flange are sequentially connected to form a "C"-shaped structure, and the left flange has the same structure as the right flange;

[0015] The widths of the first flange, the second flange, the third flange and the fourth flange gradually decrease in sequence, the widths of the fourth flange, the fifth flange, the sixth flange and the seventh flange gradually increase in sequence, and the seventh flange is in contact with the bottom surface of the sub-frame body and is welded to each other.

[0016] In some embodiments: the connecting plate is provided with two mutually spaced positioning holes, one end of the connecting plate away from the left mounting plate and the right mounting plate is connected with a lap plate, and the lap plate is in contact with the top surface of the sub-frame body;

[0017] A left notch is formed at the connection between the left end of the lap plate and the connecting plate, and a right notch is formed at the connection between the right end of the lap plate and the connecting plate. The left end surface, the right end surface and the rear end surface of the lap plate are all welded to the auxiliary frame body.

[0018] The left mounting plate and the right mounting plate are both provided with overlapping contour grooves matching the front end contour of the auxiliary frame body at one end close to the auxiliary frame body, and the overlapping contour grooves are welded to the auxiliary frame body.

[0019] In some embodiments: the sub-frame body comprises an upper welding plate assembly and a lower welding plate assembly formed by integral stamping, wherein the upper welding plate assembly and the lower welding plate assembly are welded to each other to form the sub-frame body with a hollow interior;

[0020] The subframe body also includes a suspension swing arm mounting frame located between the upper welding plate assembly and the lower welding plate assembly. The suspension swing arm mounting frame is located at the left and right ends of the upper welding plate assembly and the lower welding plate assembly and is welded to each other.

[0021] In some embodiments: a first concave rib recessed toward the inside of the sub-frame body is formed by stamping the middle of the upper welding plate assembly, and a second concave rib and a third concave rib recessed toward the inside of the sub-frame body are respectively stamped on both sides of the front end of the upper welding plate assembly;

[0022] The middle part of the lower welding plate assembly is stamped with a fourth concave rib and a fifth concave rib which are spaced front and rear and recessed into the sub-frame body, and the two sides of the front end of the lower welding plate assembly are respectively stamped with a sixth concave rib and a seventh concave rib which are recessed into the sub-frame body.

[0023] In some embodiments: a first sleeve is vertically disposed in the subframe body and is used to fix the upper welding plate assembly and the lower welding plate assembly, the top end of the first sleeve passes through the upper welding plate assembly, and the bottom end of the first sleeve passes through the lower welding plate assembly;

[0024] The sixth concave rib and the seventh concave rib are both connected with a plurality of the first sleeves, and the plurality of the first sleeves located on the sixth concave rib and the seventh concave rib are used to connect the steering gear by inserting bolts.

[0025] In some embodiments: the left front support arm and the right front support arm are symmetrically welded to the top of the sub-frame body, and the left front support arm and the right front support arm each include a first support bent plate and a second support bent plate;

[0026] The first support bent plate and the second support bent plate are welded to each other to form the left front support arm and the right front support arm which are hollow inside and bent upward, and a second sleeve is connected between the tops of the first support bent plate and the second support bent plate.

[0027] In some embodiments: the left rear support arm and the right rear support arm are symmetrically welded to the top of the sub-frame body, and the left rear support arm and the right rear support arm each include a lower bent plate and an upper bent plate;

[0028] The lower bent plate is located inside the upper bent plate and is welded to each other to form the left rear support arm and the right rear support arm which are hollow inside and bent upward. Two spaced third sleeves are connected between the tops of the lower bent plate and the upper bent plate, as well as a positioning pin located between the two third sleeves.

[0029] A second aspect of an embodiment of the present application provides a suspension system, including:

[0030] A vehicle frame, the vehicle frame comprising a left longitudinal beam assembly and a right longitudinal beam assembly spaced apart from each other, and a rear bracket of the driving motor described in any one of the above embodiments fixedly connected between the left longitudinal beam assembly and the right longitudinal beam assembly;

[0031] A motor assembly, the motor assembly being located at the front side of the rear bracket of the driving motor and between the left longitudinal beam assembly and the right longitudinal beam assembly;

[0032] A suspension unit, the suspension unit comprising a left bracket connected to the left longitudinal beam assembly and a right bracket connected to the right longitudinal beam assembly;

[0033] A left elastic bracket assembly connected to the left bracket, and a right elastic bracket assembly connected to the right bracket;

[0034] A left bracket connected between the left elastic bracket assembly and the motor assembly, and a right bracket connected between the right elastic bracket assembly and the motor assembly;

[0035] A rear suspension assembly connected to the motor assembly via a rear suspension bracket on the rear bracket of the drive motor.

[0036] The beneficial effects of the technical solution provided by this application include:

[0037] The embodiment of the present application provides a rear bracket and suspension system for a driving motor. Since the rear bracket of the driving motor of the present application is provided with a front sub-frame, the front sub-frame is a sheet metal welded part, including a sub-frame body, a left front support arm and a left rear support arm for connecting the left longitudinal beam assembly are fixedly provided at the left end of the sub-frame body, and a right front support arm and a right rear support arm for connecting the right longitudinal beam assembly are fixedly provided at the right end of the sub-frame body; a rear suspension bracket, which is an integrally stamped sheet metal part and is welded to the middle part of the front end of the sub-frame body, and the rear suspension bracket includes a left mounting plate and a right mounting plate which are parallel to each other and spaced apart, and a connecting plate connected between the left mounting plate and the right mounting plate, and the outer edges of the left mounting plate and the right mounting plate are both provided with flanges.

[0038] Therefore, the front subframe of the rear bracket of the driving motor of the present application adopts a stamped and welded sheet metal structure with integrated functions and lightweight structure, and provides support for the installation of parts of the suspension system, steering system, and suspension system. The front subframe is connected to the left longitudinal beam assembly through the left front support arm and the left rear support arm, and the front subframe is connected to the right longitudinal beam assembly through the right front support arm and the right rear support arm. The connection is reliable and the assembly process is good. The rear suspension bracket is an integrated stamped sheet metal part and is welded to the middle of the front end of the subframe body, achieving a lightweight design, and the structural design of the rear suspension bracket meets the modal and strength requirements of the suspension bracket. The present application has the advantages of simple structure, ingenious design, stable structure, good reliability, strong load-bearing capacity, lightweight, low cost, and easy assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A bottom view of the structure in which the rear bracket of the driving motor is connected to the left longitudinal beam assembly and the right longitudinal beam assembly according to an embodiment of the present application;

[0041] Figure 2 This is a schematic structural diagram of a rear suspension bracket from a first perspective of an embodiment of the present application;

[0042] Figure 3 This is a schematic structural diagram of a rear suspension bracket from a second viewing angle according to an embodiment of the present application;

[0043] Figure 4 This is a schematic structural diagram of a rear bracket of a driving motor according to an embodiment of the present application;

[0044] Figure 5 This is a schematic structural diagram of a left front support arm according to an embodiment of the present application;

[0045] Figure 6 This is a schematic structural diagram of a left rear support arm according to an embodiment of the present application;

[0046] Figure 7 Schematic diagram of the structure of the suspension system of the embodiment of the present application.

[0047] Reference numerals:

[0048] 1. Motor assembly; 2. Left bracket; 3. Left elastic bracket assembly; 4. Left bracket; 5. Right bracket; 6. Right elastic bracket assembly; 7. Right bracket; 8. Rear suspension assembly; 10. Drive motor rear bracket; 11. Right longitudinal beam assembly; 12. Left longitudinal beam assembly;

[0049] 101, rear suspension bracket; 102, front subframe; 1011, right mounting plate; 1012, right flange; 1013, connecting plate; 1014, left mounting plate; 1015, left flange; 1021, left front support arm; 1022, right front support arm; 1023, left rear support arm; 1024, right rear support arm; 1025, subframe body; 1026, suspension swing arm mounting frame;

[0050] 10111, second mounting hole; 10112, overlapping contour groove; 10113, transition groove; 10121, first flange; 10122, second flange; 10123, third flange; 10124, fourth flange; 10125, fifth flange; 10126, sixth flange; 10127, seventh flange;

[0051] 10131, positioning hole; 10132, lap plate; 10133, left notch; 10134, right notch; 10135, right end surface; 10136, rear end surface; 10137, left end surface; 10141, first mounting hole;

[0052] 10211, first supporting bent plate; 10212, second supporting bent plate; 10213, second sleeve; 10231, upper bent plate; 10232, lower bent plate; 10233, third sleeve; 10234, positioning pin;

[0053] 10251, upper welding plate assembly; 10252, lower welding plate assembly; 10253, first sleeve; 102511, first concave rib; 102512, second concave rib; 102513, third concave rib; 102521, fourth concave rib; 102522, sixth concave rib; 102523, seventh concave rib; 102524, fifth concave rib. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0055] The embodiment of the present application provides a drive motor rear bracket and suspension system, which can solve the problem in the related art that the suspension bracket and the subframe usually adopt a casting design structure in order to obtain higher mode and strength, but the casting manufacturing cost is high.

[0056] See also Figures 1 to 4As shown, the first aspect of the embodiment of the present application provides a drive motor rear bracket, and the drive motor rear bracket 10 includes:

[0057] The front subframe 102 is a sheet metal welded part, including a subframe body 1025, the cross-section of the subframe body 1025 is a flat hollow rectangular structure, a left front support arm 1021 and a left rear support arm 1023 for connecting the left longitudinal beam assembly 12 are fixedly provided at the left end of the subframe body 1025, and a right front support arm 1022 and a right rear support arm 1024 for connecting the right longitudinal beam assembly 11 are fixedly provided at the right end of the subframe body 1025, and the left front support arm 1021, the left rear support arm 1023, the right front support arm 1022 and the right rear support arm 1024 fix the subframe body 1025 to the bottom of the left longitudinal beam assembly 12 and the right longitudinal beam assembly 11.

[0058] The rear suspension bracket 101 is a sheet metal part formed by integral stamping and welded to the middle of the front end of the sub-frame body 1025. The rear suspension bracket 101 includes a left mounting plate 1014 and a right mounting plate 1011 which are parallel to each other and spaced apart, and a connecting plate 1013 connected between the left mounting plate 1014 and the right mounting plate 1011. The outer edges of the left mounting plate 1014 and the right mounting plate 1011 are both provided with flanges. The left mounting plate 1014 and the right mounting plate 1011 are spaced apart from each other and are parallel to the ZOX plane of the whole vehicle. Figure 1 and Figure 2 The X-axis direction is the length (front and back) direction of the vehicle, the Y-axis direction is the width (left and right) direction of the vehicle, and the Z-axis direction is the height (up and down) direction of the vehicle.

[0059] The front subframe 102 of the rear bracket of the driving motor of the embodiment of the present application adopts a stamped and welded sheet metal structure, with integrated functions and lightweight structure, and provides support for the installation of parts of the suspension system, steering system, and suspension system. The front subframe 102 is connected to the left longitudinal beam assembly 12 through the left front support arm 1021 and the left rear support arm 1023, and the front subframe 102 is connected to the right longitudinal beam assembly 11 through the right front support arm 1022 and the right rear support arm 1024, with reliable connection and good assembly processability.

[0060] The rear suspension bracket 101 is an integrally stamped sheet metal part and is welded to the middle of the front end of the sub-frame body 1025. The left mounting plate 1014 and the right mounting plate 1011 of the rear suspension bracket 101 are both welded to the sub-frame body 1025, and the outer edges of the left mounting plate 1014 and the right mounting plate 1011 are both provided with a flange structure design to meet the modal and strength requirements of the rear suspension bracket 101. The present application has the advantages of simple structure, ingenious design, stable structure, good reliability, strong load-bearing capacity, light weight, low cost, and easy assembly.

[0061] In some alternative embodiments: See Figure 2 and Figure 3 As shown, the embodiment of the present application provides a rear bracket of a driving motor, wherein a first mounting hole 10141 is provided on the left mounting plate 1014 of the rear bracket 10 of the driving motor, and a second mounting hole 10111 is provided on the right mounting plate 1011. The first mounting hole 10141 and the second mounting hole 10111 have the same diameter and the centers of the circles are located on the same axis. The first mounting hole 10141 and the second mounting hole 10111 are used to install rear suspension mounting bolts.

[0062] The flange on the left mounting plate 1014 is the left flange 1015, and the flange on the right mounting plate 1011 is the right flange 1012. The left flange 1015 is bent on the left mounting plate 1014 in a direction away from the right mounting plate 1011, and the right flange 1012 is bent on the right mounting plate 1011 in a direction away from the left mounting plate 1014. The left flange 1015 is integrally stamped and formed with the left mounting plate 1014 to enhance the bending strength of the left mounting plate 1014, and the right flange 1012 is integrally stamped and formed with the right mounting plate 1011 to enhance the bending strength of the right mounting plate 1011.

[0063] Specifically, the left flange 1015 and the right flange 1012 each include a first flange 10121, a second flange 10122, a third flange 10123, and a fourth flange 10124 located at the top of the left mounting plate 1014 and the right mounting plate 1011 and arranged sequentially from back to front, and a fifth flange 10125, a sixth flange 10126, and a seventh flange 10127 located at the bottom of the left mounting plate 1014 and the right mounting plate 1011 and arranged sequentially from front to back. The first flange 10121, the second flange 10122, the third flange 10123, the fourth flange 10124, the fifth flange 10125, the sixth flange 10126, and the seventh flange 10127 are sequentially connected to form a "C"-shaped structure.

[0064] The right flange 1012 has the same structure as the left flange 1015. The widths of the first flange 10121, the second flange 10122, the third flange 10123 and the fourth flange 10124 gradually decrease, and the widths of the fourth flange 10124, the fifth flange 10125, the sixth flange 10126 and the seventh flange 10127 gradually increase. This width variation design is designed based on CAE strength, modal analysis results and mold simulation analysis results, and the seventh flange 10127 is in contact with the bottom surface of the sub-frame body 1025 and is welded to each other.

[0065] In some alternative embodiments: See Figure 2 and Figure 3As shown, the embodiment of the present application provides a rear bracket for a driving motor, and two mutually spaced positioning holes 10131 are provided on the connecting plate 1013 of the rear bracket 10 for the driving motor, and the positioning holes 10131 are used to accurately position the rear suspension bracket 101 and the sub-frame body 1025 before welding. A lap plate 10132 is connected to one end of the connecting plate 1013 away from the left mounting plate 1014 and the right mounting plate 1011, and the lap plate 10132 and the top surface of the sub-frame body 1025 are mutually attached.

[0066] The angle between the lap plate 10132 and the connecting plate 1013 is an obtuse angle, a left notch 10133 is provided at the connection between the left end of the lap plate 10132 and the connecting plate 1013, and a right notch 10134 is provided at the connection between the right end of the lap plate 10132 and the connecting plate 1013, and the left notch 10133 and the right notch 10134 are conducive to stamping. The left end face 10137, the right end face 10135 and the rear end face 10136 of the lap plate 10132 are all welded to the auxiliary frame body 1025.

[0067] The left mounting plate 1014 and the right mounting plate 1011 are provided with a lap profile groove 10112 matching the front end profile of the sub-frame body 1025 at one end thereof near the sub-frame body 1025. The lap profile groove 10112 fits the front end of the sub-frame body 1025. After the lap profile groove 10112 and the sub-frame body 1025 are butt-jointed and positioned, they are connected by welding. The left mounting plate 1014 and the right mounting plate 1011 are provided with a transition groove 10113 near the top of the connecting plate 1013. The transition groove 10113 is conducive to stamping.

[0068] In some alternative embodiments: See Figure 1 and Figure 4 As shown, the embodiment of the present application provides a drive motor rear bracket, and the sub-frame body 1025 of the drive motor rear bracket 10 includes an integrally stamped upper welding plate assembly 10251 and an integrally stamped lower welding plate assembly 10252. The upper welding plate assembly 10251 and the lower welding plate assembly 10252 are welded to each other to form the sub-frame body 1025 with a hollow interior.

[0069] The upper welding plate assembly 10251 is a sheet metal shell with a hollow interior and an opening facing downward, and the lower welding plate assembly 10252 is a sheet metal shell with a hollow interior and an opening facing upward. The openings of the upper welding plate assembly 10251 and the lower welding plate assembly 10252 are welded relative to each other. The subframe body 1025 also includes a suspension swing arm mounting frame 1026 located between the upper welding plate assembly 10251 and the lower welding plate assembly 10252. The suspension swing arm mounting frame 1026 is located at the left and right ends of the upper welding plate assembly 10251 and the lower welding plate assembly 10252 and is welded to each other. The suspension swing arm mounting frame 1026 is used to install the suspension lower swing arm.

[0070] In some alternative embodiments: See Figure 1 and Figure 4 As shown, the embodiment of the present application provides a rear bracket of a driving motor, wherein the middle portion of the upper welding plate assembly 10251 of the rear bracket of the driving motor is stamped with a first concave rib 102511 that is concave toward the inside of the sub-frame body 1025, and the two sides of the front end of the upper welding plate assembly 10251 are respectively stamped with a second concave rib 102512 and a third concave rib 102513 that are concave toward the inside of the sub-frame body 1025. The first concave rib 102511, the second concave rib 102512, and the third concave rib 102513 are all used to enhance the structural strength of the upper welding plate assembly 10251.

[0071] The lower welding plate assembly 10252 is stamped with a fourth concave rib 102521 and a fifth concave rib 102524 that are spaced apart from each other and are recessed into the sub-frame body 1025, and the front and rear sides of the lower welding plate assembly 10252 are respectively stamped with a sixth concave rib 102522 and a seventh concave rib 102523 that are recessed into the sub-frame body 1025. The fourth concave rib 102521, the fifth concave rib 102524, the sixth concave rib 102522, and the seventh concave rib 102523 are all used to enhance the structural strength of the lower welding plate assembly 10252.

[0072] A first sleeve 10253 is vertically arranged in the sub-frame body 1025 and is used to fix the upper welding plate assembly 10251 and the lower welding plate assembly 10252. The top end of the first sleeve 10253 penetrates the upper welding plate assembly 10251, and the bottom end of the first sleeve 10253 penetrates the lower welding plate assembly 10252. Multiple first sleeves 10253 are connected to the sixth concave rib 102522 and the seventh concave rib 102523. The multiple first sleeves 10253 located on the sixth concave rib 102522 and the seventh concave rib 102523 are used to connect the steering gear by inserting bolts.

[0073] A plurality of first sleeves 10253 are located within the subframe body 1025. They are not only used for vertically connecting the upper welding plate assembly 10251 and the lower welding plate assembly 10252 to enhance the structural strength between the upper welding plate assembly 10251 and the lower welding plate assembly 10252, but also a plurality of first sleeves 10253 located on the sixth concave rib 102522 and the seventh concave rib 102523 are also used to connect the steering gear by inserting bolts, providing a structurally stable installation point for installing the steering gear on the front subframe 102.

[0074] In some alternative embodiments: Refer to Figure 5 As shown, the embodiment of the present application provides a rear bracket for a drive motor. The left front support arm 1021 and the right front support arm 1022 of the rear bracket 10 for the drive motor are symmetrically welded to the top of the subframe body 1025. The left front support arm 1021 and the right front support arm 1022 both include a first support bent plate 10211 and a second support bent plate 10212. The first support bent plate 10211 and the second support bent plate 10212 are both sheet metal stamping formed structures, and the cross-sections of the first support bent plate 10211 and the second support bent plate 10212 are in an "L" shape.

[0075] The first support bent plate 10211 and the second support bent plate 10212 are welded to each other to form the left front support arm 1021 and the right front support arm 1022 that are internally hollow and bent upward. A second sleeve 10213 is connected between the tops of the first support bent plate 10211 and the second support bent plate 10212. The second sleeve 10213 is vertically arranged and penetrates through the first support bent plate 10211 and the second support bent plate 10212. The first support bent plate 10211 and the second support bent plate 10212 are respectively connected to the left longitudinal beam assembly 12 and the right longitudinal beam assembly 11 by inserting bolts into the second sleeve 10213.

[0076] In some alternative embodiments: Refer to Figure 6 As shown, the embodiment of the present application provides a rear bracket for a drive motor. The left rear support arm 1023 and the right rear support arm 1024 of the rear bracket 10 for the drive motor are symmetrically welded to the top of the subframe body 1025. The left rear support arm 1023 and the right rear support arm 1024 both include a lower layer bent plate 10232 and an upper layer bent plate 10231. The lower layer bent plate 10232 and the upper layer bent plate 10231 are both sheet metal stamping formed structures, and the cross-sections of the lower layer bent plate 10232 and the upper layer bent plate 10231 are in a "匚" shape.

[0077] The lower curved plate 10232 is located inside the upper curved plate 10231 and is welded to each other to form a left rear support arm 1023 and a right rear support arm 1024 that are hollow inside and bent upward. Two spaced third sleeves 10233 are connected between the tops of the lower curved plate 10232 and the upper curved plate 10231, and a positioning pin 10234 is located between the two third sleeves 10233. The third sleeve 10233 is vertically arranged and penetrates the lower curved plate 10232 and the upper curved plate 10231. The lower curved plate 10232 and the upper curved plate 10231 are respectively connected to the left longitudinal beam assembly 12 and the right longitudinal beam assembly 11 by inserting bolts into the third sleeve 10233. When the front subframe 102 is installed, the positioning pin 10234 plays a positioning role to improve the installation accuracy and assembly processability.

[0078] See also Figure 7 As shown, the second aspect of the embodiment of the present application provides a suspension system, including:

[0079] A vehicle frame, the vehicle frame comprising a left longitudinal beam assembly 12 and a right longitudinal beam assembly 11 which are spaced apart from each other, and a drive motor rear bracket 10 according to any of the above embodiments fixedly connected between the left longitudinal beam assembly 12 and the right longitudinal beam assembly 11. A motor assembly 1, the motor assembly 1 being located at the front side of the drive motor rear bracket 10 and between the left longitudinal beam assembly 12 and the right longitudinal beam assembly 11.

[0080] The suspension unit includes a left bracket 2 connected to the left longitudinal beam assembly 12, a right bracket 5 connected to the right longitudinal beam assembly 11; a left elastic bracket assembly 3 connected to the left bracket 2, a right elastic bracket assembly 6 connected to the right bracket 5; a left bracket 4 connected between the left elastic bracket assembly 3 and the motor assembly 1, and a right bracket 7 connected between the right elastic bracket assembly 6 and the motor assembly 1; and a rear suspension assembly 8 connected to the motor assembly 1 through a rear suspension bracket 101 on the rear bracket 10 of the driving motor.

[0081] The left bracket 2 of the embodiment of the present application is installed on the left longitudinal beam assembly 12 by bolts; the left elastic bracket assembly 3 is installed on the left bracket 2 by bolts and nuts; the left bracket 4 is installed on the motor assembly 1 by bolts and connected to the left elastic bracket assembly 3. The right bracket 5 is installed on the right longitudinal beam assembly 11 by bolts; the right elastic bracket assembly 6 is installed on the right bracket 5 by bolts and nuts; the right bracket 7 is installed on the motor assembly 1 by bolts and connected to the right elastic bracket assembly 6; the rear suspension assembly 8 is installed on the motor assembly 1 by bolts and connected to the rear suspension bracket 101.

[0082] The left bracket 4, the right bracket 7, and the rear suspension assembly 8 jointly support the motor assembly 1; the left bracket 2, the right bracket 5, and the rear suspension bracket 101 jointly connect the motor assembly 1 to the rear bracket 10 of the driving motor; the left elastic bracket assembly 3, the right elastic bracket assembly 6, and the rear suspension assembly 8 play the role of connection, shock absorption, and vibration isolation. As mentioned above, the rear suspension assembly 8 plays the role of supporting the motor assembly 1, and also plays the role of connection, shock absorption, and vibration isolation. The rear suspension assembly 8 connects the motor assembly 1 and the rear suspension bracket 101, and is used to attenuate and isolate the vibration and force transmitted from the motor assembly 1 to the rear suspension bracket 101.

[0083] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0084] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0085] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A rear bracket of a driving motor, characterized in that: include: A front sub-frame (102), the front sub-frame (102) being a sheet metal welded part, comprising a sub-frame body (1025), a left front support arm (1021) and a left rear support arm (1023) for connecting a left longitudinal beam assembly (12) being fixedly disposed at the left end of the sub-frame body (1025), and a right front support arm (1022) and a right rear support arm (1024) for connecting a right longitudinal beam assembly (11) being fixedly disposed at the right end of the sub-frame body (1025); A rear suspension bracket (101), the rear suspension bracket (101) is an integrally stamped sheet metal part and is welded to the middle of the front end of the sub-frame body (1025), the rear suspension bracket (101) comprises a left mounting plate (1014) and a right mounting plate (1011) which are parallel to each other and spaced apart, and a connecting plate (1013) connected between the left mounting plate (1014) and the right mounting plate (1011), and the outer edges of the left mounting plate (1014) and the right mounting plate (1011) are both provided with flanges.

2. A drive motor rear bracket as claimed in claim 1, characterized in that: The left mounting plate (1014) is provided with a first mounting hole (10141), and the right mounting plate (1011) is provided with a second mounting hole (10111), wherein the first mounting hole (10141) and the second mounting hole (10111) have the same diameter and their centers are located on the same axis; The flange on the left mounting plate (1014) is a left flange (1015), and the flange on the right mounting plate (1011) is a right flange (1012); the left flange (1015) is bent on the left mounting plate (1014) in a direction away from the right mounting plate (1011), and the right flange (1012) is bent on the right mounting plate (1011) in a direction away from the left mounting plate (1014).

3. A drive motor rear bracket as claimed in claim 2, characterized in that: The right flange (1012) comprises a first flange (10121), a second flange (10122), a third flange (10123) and a fourth flange (10124) which are located at the top of the right mounting plate (1011) and arranged in sequence from back to front, and a fifth flange (10125), a sixth flange (10126) and a seventh flange (10127) which are located at the bottom of the right mounting plate (1011) and arranged in sequence from front to back; The first flange (10121), the second flange (10122), the third flange (10123), the fourth flange (10124), the fifth flange (10125), the sixth flange (10126) and the seventh flange (10127) are sequentially connected to form a "C"-shaped structure, and the left flange (1015) has the same structure as the right flange (1012); The widths of the first flange (10121), the second flange (10122), the third flange (10123) and the fourth flange (10124) are gradually reduced in sequence, and the widths of the fourth flange (10124), the fifth flange (10125), the sixth flange (10126) and the seventh flange (10127) are gradually increased in sequence, and the seventh flange (10127) is in contact with the bottom surface of the sub-frame body (1025) and is welded to each other.

4. A drive motor rear bracket according to any one of claims 1 to 3, characterized in that: The connecting plate (1013) is provided with two positioning holes (10131) spaced apart from each other, and one end of the connecting plate (1013) away from the left mounting plate (1014) and the right mounting plate (1011) is connected with a lap plate (10132), and the lap plate (10132) and the top surface of the auxiliary frame body (1025) are mutually fitted; A left notch (10133) is provided at the connection between the left end of the lap plate (10132) and the connecting plate (1031), a right notch (10134) is provided at the connection between the right end of the lap plate (10132) and the connecting plate (1013), and a left end face (10137), a right end face (10135) and a rear end face (10136) of the lap plate (10132) are all welded to the auxiliary frame body (1025); The left mounting plate (1014) and the right mounting plate (1011) are both provided with an overlap contour groove (10112) adapted to the front end contour of the sub-frame body (1025) at one end close to the sub-frame body (1025), and the overlap contour groove (10112) is welded to the sub-frame body (1025).

5. The rear bracket of a driving motor according to claim 1, characterized in that: The sub-frame body (1025) comprises an upper welding plate assembly (10251) formed by integral stamping and an lower welding plate assembly (10252) formed by integral stamping, wherein the upper welding plate assembly (10251) and the lower welding plate assembly (10252) are mutually welded and connected to form the sub-frame body (1025) which is hollow inside. The sub-frame body (1025) further comprises a suspension swing arm mounting frame (1026) located between the upper welding plate assembly (10251) and the lower welding plate assembly (10252); the suspension swing arm mounting frame (1026) is located at the left and right ends of the upper welding plate assembly (10251) and the lower welding plate assembly (10252) and is welded to each other.

6. A rear bracket for a driving motor as claimed in claim 5, characterized in that: A first concave rib (102511) is punched out in the middle of the upper welding plate assembly (10251) and is recessed into the interior of the sub-frame body (1025); and a second concave rib (102512) and a third concave rib (102513) are punched out on both sides of the front end of the upper welding plate assembly (10251) and are recessed into the interior of the sub-frame body (1025); The middle part of the lower welding plate assembly (10252) is stamped with a fourth concave rib (102521) and a fifth concave rib (102524) which are arranged at a front-to-rear interval and are recessed into the sub-frame body (1025), and the two sides of the front end of the lower welding plate assembly (10252) are respectively stamped with a sixth concave rib (102522) and a seventh concave rib (102523) which are recessed into the sub-frame body (1025).

7. A rear bracket for a driving motor as claimed in claim 6, characterized in that: A first sleeve (10253) is provided in the sub-frame body (1025) and is vertically arranged and used to fixedly connect the upper welding plate assembly (10251) and the lower welding plate assembly (10252); the top end of the first sleeve (10253) passes through the upper welding plate assembly (10251), and the bottom end of the first sleeve (10253) passes through the lower welding plate assembly (10252); The sixth concave rib (102522) and the seventh concave rib (102523) are both connected to a plurality of the first sleeves (10253), and the plurality of the first sleeves (10253) located on the sixth concave rib (102522) and the seventh concave rib (102523) are used to connect the steering gear by inserting bolts.

8. A drive motor rear bracket as claimed in claim 1 or 5, characterized in that: The left front support arm (1021) and the right front support arm (1022) are symmetrically welded to the top of the sub-frame body (1025), and the left front support arm (1021) and the right front support arm (1022) both include a first support bent plate (10211) and a second support bent plate (10212); The first support bent plate (10211) and the second support bent plate (10212) are welded to each other to form the left front support arm (1021) and the right front support arm (1022) which are hollow inside and bent upward, and a second sleeve (10213) is connected between the tops of the first support bent plate (10211) and the second support bent plate (10212).

9. A rear bracket for a driving motor as claimed in claim 1 or 5, characterized in that: The left rear support arm (1023) and the right rear support arm (1024) are symmetrically welded to the top of the sub-frame body (1025), and the left rear support arm (1023) and the right rear support arm (1024) both include a lower bent plate (10232) and an upper bent plate (10231); The lower bent plate (10232) is located inside the upper bent plate (10231) and is welded to each other to form the left rear support arm (1023) and the right rear support arm (1024) which are hollow inside and bent upward. Two spaced third sleeves (10233) are connected between the tops of the lower bent plate (10232) and the upper bent plate (10231), as well as a positioning pin (10234) located between the two third sleeves (10233).

10. A suspension system, characterized in that: include: A vehicle frame, the vehicle frame comprising a left longitudinal beam assembly (12) and a right longitudinal beam assembly (11) which are spaced apart from each other, and a drive motor rear bracket (10) according to any one of claims 1 to 9 which is fixedly connected between the left longitudinal beam assembly (12) and the right longitudinal beam assembly (11); A motor assembly (1), the motor assembly (1) being located at the front side of the rear bracket (10) of the driving motor and between the left longitudinal beam assembly (12) and the right longitudinal beam assembly (11); A suspension unit, the suspension unit comprising a left bracket (2) connected to the left longitudinal beam assembly (12), and a right bracket (5) connected to the right longitudinal beam assembly (11); A left elastic bracket assembly (3) connected to the left bracket (2), and a right elastic bracket assembly (6) connected to the right bracket (5); A left bracket (4) connected between the left elastic bracket assembly (3) and the motor assembly (1), and a right bracket (7) connected between the right elastic bracket assembly (6) and the motor assembly (1); A rear suspension assembly (8) connected to the motor assembly (1) via a rear suspension bracket (101) on a rear bracket (10) of a driving motor.

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