Driving motor right bracket, suspension system and design method

Abstract

The invention relates to a driving motor right bracket, a suspension system and a design method, and belongs to the technical field of electric automobile suspension systems, the driving motor right bracket comprises a step plate, the step plate is integrally formed and is in a Z shape, and the step plate is provided with a plurality of mounting holes located in all plate blocks of the step plate; the two ends of the box-shaped reinforcing piece are fixedly connected with the two adjacent plate blocks of the step plate respectively, and the box-shaped reinforcing piece is located in an area defined by the multiple installation holes. Therefore, the step plate can be conveniently attached to the top wall and the side wall of the right longitudinal beam of the vehicle body, the welding amount is reduced due to the integrated structure, meanwhile, the box-shaped reinforcing piece can reinforce the structure of the step plate, the modality of the step plate is increased, force can be transmitted to the positions of the mounting holes around, and the right bracket of the driving motor has the advantages of being stable in structure, good in reliability, convenient to install and the like. The bearing capacity is strong, the weight is light, the cost is low, and the assembly is easy.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicle suspension systems, and in particular to a right bracket of a drive motor, a suspension system and a design method. 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] In the prior art, a bracket in an electric vehicle suspension system is often designed in a building block manner. If the structural design is too complex, the manufacturing cost of the bracket will be high. If the structural design is too simple, the bracket will break.

[0004] In particular, the right bracket of the drive motor is designed to be relatively bulky and has many sheet metal joints, which can easily cause parts failure due to welding quality problems. In addition, the cost of the parts is high and the root strength of the parts is difficult to guarantee. Summary of the invention

[0005] In response to the deficiencies or one of the deficiencies raised by the above-mentioned background technology, the embodiments of the present application provide a right bracket of a drive motor, a suspension system and a design method. While adapting to the technical characteristics of the suspension system of an electric vehicle, the structure of the right bracket of the drive motor is optimized, and the iterative optimization design is performed using the CAE simulation analysis method, which can achieve lightweight design, reduce the number of welds, and improve the safety of parts.

[0006] In a first aspect, an embodiment of the present application provides a right bracket of a driving motor, comprising:

[0007] A step plate, the step plate is integrally formed and in a "Z" shape, and the step plate is provided with a plurality of mounting holes located on each plate of the step plate;

[0008] A box-shaped reinforcement, both ends of which are fixedly connected to two adjacent plates of the step plate, and the box-shaped reinforcement is located in the area surrounded by the plurality of mounting holes.

[0009] In the first aspect, in some embodiments, the step plate includes a top plate, a side plate and a bottom plate that are integrally connected, and two ends of the box-shaped reinforcement are fixedly connected to the side plate and the bottom plate respectively.

[0010] In the first aspect, in some embodiments, the bottom plate extends along the Y-axis direction of the vehicle, and the size of the cross-section of the box-shaped reinforcement gradually increases in the direction from the top plate to the bottom plate.

[0011] On the first aspect, in some embodiments, the box-shaped reinforcement includes a U-shaped plate fixedly connected to the side plate and the bottom plate, and a flat plate fixedly connected to the side plate and the U-shaped plate, and the U-shaped plate, the flat plate, the side plate and the bottom plate together form a closed box structure.

[0012] In the first aspect, in some embodiments, the mounting holes include a first mounting hole, a second mounting hole and a third mounting hole located on the top plate, and the first mounting hole, the second mounting hole and the third mounting hole are spaced apart along the X-axis direction of the vehicle;

[0013] Three reinforcing ring pieces are fixedly connected to the top surface of the top plate and are coaxial with the first mounting hole, the second mounting hole and the third mounting hole respectively.

[0014] In the first aspect, in some embodiments, the mounting holes further include a fourth mounting hole, a fifth mounting hole, a sixth mounting hole and a seventh mounting hole located on the side plate;

[0015] The fourth mounting hole and the sixth mounting hole are distributed along the Z-axis direction of the vehicle and are located at the front side of the box-shaped reinforcement, and the fifth mounting hole and the seventh mounting hole are distributed along the Z-axis direction of the vehicle and are located at the rear side of the box-shaped reinforcement;

[0016] The distance between the fourth mounting hole and the box-shaped reinforcement is greater than the distance between the fifth mounting hole and the box-shaped reinforcement.

[0017] In the first aspect, in some embodiments, the mounting holes further include a first assembly hole, a second assembly hole, a third assembly hole and a fourth assembly hole located on the bottom plate;

[0018] The box-shaped reinforcement member falls on the bottom plate and is away from the two corners of the side plate, and the connecting line of the two corners of the bottom plate away from the side plate forms an "eight" shape;

[0019] The first assembly hole and the second assembly hole are located on the connecting line on one side, and the third assembly hole and the fourth assembly hole are located on the connecting line on the other side.

[0020] In the first aspect, in some embodiments, the mounting hole further comprises a first positioning hole and a second positioning hole located on the bottom plate, and the first positioning hole and the second positioning hole are located on opposite sides of the connecting lines on both sides;

[0021] The first positioning hole, the first assembly hole and the second assembly hole are distributed in a triangle, and the second positioning hole, the third assembly hole and the fourth assembly hole are distributed in a triangle.

[0022] In the first aspect, in some embodiments, the side plate is provided with a first weight-reducing hole, the bottom plate is provided with a second weight-reducing hole, the first weight-reducing hole and the second weight-reducing hole intersect and are both connected to the interior of the box-shaped reinforcement;

[0023] The step plate extends along the X-axis direction of the vehicle, a first weight-reducing groove is arranged on the front side of the bottom plate, a second weight-reducing groove is arranged on the rear side, and a third weight-reducing groove intersecting with the second weight-reducing groove is arranged on the rear side of the side plate.

[0024] In a second aspect, an embodiment of the present application provides a suspension system, including:

[0025] A vehicle frame, the vehicle frame comprising a left longitudinal beam assembly and a right longitudinal beam assembly which are spaced apart from each other, and a sub-frame assembly which is fixedly connected between the left longitudinal beam assembly and the right longitudinal beam assembly;

[0026] A motor assembly, the motor assembly being located at the front side of the subframe assembly and between the left longitudinal beam assembly and the right longitudinal beam assembly;

[0027] A suspension unit, the suspension unit comprising a left bracket of a driving motor connected to the left longitudinal beam assembly, and a right bracket of the driving motor described in any one of the above items connected to the right longitudinal beam assembly;

[0028] A left elastic bracket assembly connected to the left bracket of the drive motor, and a right elastic bracket assembly connected to the right bracket of the drive motor;

[0029] 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;

[0030] A rear suspension bracket connected to the subframe assembly, and a rear suspension assembly connected between the rear suspension bracket and the motor assembly.

[0031] In a third aspect, an embodiment of the present application provides a method for designing a suspension system, the method comprising:

[0032] Step S1, obtaining simulation parameters of the suspension system, and using the simulation parameters to construct a simulation model, and performing modal and stress simulation analysis on the simulation model to obtain simulation results;

[0033] Step S2, in the simulation model, obtaining the size parameters of the box-shaped reinforcement on the right bracket of the driving motor and the position parameters of the mounting holes around the box-shaped reinforcement, and defining the change range of each parameter;

[0034] Step S3, perform simulation iterative optimization on the above parameters. When the right bracket of the drive motor satisfies the preset mode and stress values ​​at the same time, it is considered that the optimization result reaches an acceptable optimal solution. The optimization is terminated and the optimal solution is output to obtain a right bracket structure of the drive motor that meets the design requirements.

[0035] The beneficial effects of the technical solution provided by this application include:

[0036] An embodiment of the present application provides a right bracket of a driving motor, a suspension system and a design method, including a step plate and a box-shaped reinforcement. Since the step plate is integrally formed and in a "Z" shape, the step plate is provided with a plurality of mounting holes located on each plate of the step plate. The two ends of the box-shaped reinforcement are respectively fixedly connected to two adjacent plates of the step plate, and the box-shaped reinforcement is located in the area surrounded by the plurality of mounting holes.

[0037] Therefore, the step plate can be conveniently installed in conjunction with the top wall and side wall of the right longitudinal beam of the vehicle body, and its integrated structure reduces the amount of welding. At the same time, the box-shaped reinforcement provided can strengthen the structure of the step plate and increase the modal, which is beneficial for transmitting force to the positions of multiple surrounding mounting holes. At the same time, the simulation analysis method is used for iterative optimization design to obtain the optimal position of each mounting hole, thereby improving the structural reliability, so that the right bracket of the drive motor has the advantages of stable structure, good reliability, strong load-bearing capacity, lightweight, low cost and easy assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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.

[0039] Figure 1 This is a schematic structural diagram of the right bracket of the driving motor according to an embodiment of the present application;

[0040] Figure 2 This is a schematic diagram of the structure of the step plate of an embodiment of the present application;

[0041] Figure 3 A schematic top view of a box-shaped reinforcement member according to an embodiment of the present application;

[0042] Figure 4 A schematic side view of a box-shaped reinforcement member according to an embodiment of the present application;

[0043] Figure 5 A schematic diagram of the force on the right bracket of the driving motor according to an embodiment of the present application;

[0044] Figure 6 Schematic diagram of the structure of the suspension system of the embodiment of the present application.

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] 1. Motor assembly; 2. Drive motor left bracket; 3. Left elastic bracket assembly; 4. Left bracket; 5. Drive motor right bracket; 6. Right elastic bracket assembly; 7. Right bracket; 8. Rear suspension assembly; 9. Rear suspension bracket; 10. Left longitudinal beam assembly; 11. Right longitudinal beam assembly; 12. Subframe assembly;

[0047] 51, step plate; 52, box-shaped reinforcement member; 53, reinforcement ring plate; 511, bottom plate; 512, top plate; 513, side plate; 521, U-shaped plate; 522, flat plate; 5111, first assembly hole; 5112, second assembly hole; 5113, third assembly hole; 5114, fourth assembly hole; 5115, first weight reduction groove; 5116, second weight reduction groove; 5117, second weight reduction hole; 5118, first positioning hole; 5119, second positioning hole;

[0048] 5121, first mounting hole; 5122, second mounting hole; 5123, third mounting hole; 5131, fourth mounting hole; 5132, fifth mounting hole; 5133, sixth mounting hole; 5134, seventh mounting hole; 5135, first weight-reducing hole; 5136, third weight-reducing groove. DETAILED DESCRIPTION

[0049] 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.

[0050] In response to the deficiencies or one of the deficiencies raised by the above-mentioned background technology, the embodiments of the present application provide a right bracket of a drive motor, a suspension system and a design method. While adapting to the technical characteristics of the suspension system of an electric vehicle, the structure of the right bracket of the drive motor is optimized, and the iterative optimization design is performed using the CAE simulation analysis method, which can achieve lightweight design, reduce the number of welds, and improve the safety of parts.

[0051] See also Figures 1 to 5 As shown, the first aspect of the embodiment of the present application provides a right bracket of a driving motor, comprising:

[0052] The step plate 51 is integrally formed and is in a "Z" shape, and the step plate 51 is provided with a plurality of mounting holes located on each plate of the step plate 51;

[0053] The box-shaped reinforcement member 52 has two ends fixedly connected to two adjacent plates of the step plate 51 , and the box-shaped reinforcement member 52 is located in the area surrounded by the multiple mounting holes.

[0054] The right bracket of the driving motor of the embodiment of the present application includes a step plate 51 and a box-shaped reinforcement 52. The step plate 51 is integrally formed and has a "Z" shape, and a plurality of mounting holes located on each plate of the step plate 51 are opened on the step plate 51, so that the step plate 51 can be conveniently installed with the top wall and side wall of the right longitudinal beam of the vehicle body at the same time.

[0055] The two ends of the box-shaped reinforcement 52 are respectively welded and fixed to the two adjacent plates of the step plate 51, and the box-shaped reinforcement 52 is located in the area surrounded by multiple mounting holes. The box-shaped reinforcement 52 has a good reinforcement effect, which can strengthen the structure of the step plate 51 and increase the mode, and at the same time it is beneficial to transfer force to the positions of multiple surrounding mounting holes.

[0056] Exemplarily, the step plate 51 of the present embodiment is formed by integrally stamping a steel plate of suitable strength; the box-shaped reinforcement 52 is prefabricated by welding a steel plate of suitable strength in advance, and is fixed to the step plate 51 by welding; the positions of the mounting holes on the step plate 51 can be iteratively optimized and designed through CAE simulation analysis.

[0057] Thus, the right bracket 5 of the driving motor can reach the required modal and stress values; for example, the modal of the right bracket 5 of the driving motor is greater than 600 Hz, and the stress is less than the allowable and tensile stress of the bracket material. The right bracket 5 of the driving motor has the advantages of simple structure, ingenious design, stable structure, good reliability, strong bearing capacity, light weight, low cost and easy assembly.

[0058] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a right bracket of a driving motor, wherein the step plate 51 of the right bracket 5 of the driving motor includes a top plate 512, a side plate 513 and a bottom plate 511 that are integrally connected, and the two ends of the box-shaped reinforcement 52 are fixedly connected to the side plate 513 and the bottom plate 511 respectively.

[0059] The step plate 51 of the embodiment of the present application includes a top plate 512, a side plate 513 and a bottom plate 511 which are integrally connected. The top plate 512, the side plate 513 and the bottom plate 511 are formed by integral stamping, which can avoid unnecessary welding caused by splicing and failure of parts breakage due to poor welding; the bottom plate 511 is parallel to the XOY plane of the vehicle, which is convenient for overlapping and installing the right elastic bracket assembly 6.

[0060] The side plate 513 and the bottom plate 511 are perpendicular to each other, and the side plate 513 is parallel to the XOZ plane of the vehicle, so as to facilitate installation on the side wall of the right longitudinal beam of the vehicle body. Figure 1 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.

[0061] The two ends of the box-shaped reinforcement 52 are respectively welded and fixed to the side panel 513 and the bottom panel 511, which can effectively strengthen the cantilever structure formed by the step plate 51. The support reaction force on the bottom panel 511 can be directly transmitted to the right longitudinal beam of the vehicle body connected to the side panel 513 through the box-shaped reinforcement 52, so that the overall mode of the bracket structure is increased and the strength is strengthened.

[0062] It should be noted that the right bracket 5 of the drive motor of the present application is a welded structure, and its outstanding advantage lies in the arrangement of the mounting holes and the box-shaped reinforcement 52 on the step plate 51, which can effectively guide the transmission of force; the box-packed structure composed of the box-shaped reinforcement 52 and the step plate 51 plays a role in structural reinforcement and modal increase, which is beneficial to the transmission of force to the root (the position of the mounting holes on the side plate 513); the right bracket 5 of the drive motor adopts a sheet metal structure formed by sheet metal stamping and welding instead of a cast structure, which is suitable for vehicle products with small dimensions and reduces the cost of parts.

[0063] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a right bracket of a driving motor, wherein the bottom plate 511 of the right bracket 5 of the driving motor extends along the Y-axis direction of the vehicle, and the cross-sectional size of the box-shaped reinforcement 52 gradually increases from the top plate 512 to the bottom plate 511.

[0064] The bottom plate 511 of the embodiment of the present application extends along the Y-axis direction of the vehicle. To ensure that the bottom plate 511 can be effectively strengthened, the cross-sectional size of the box-shaped reinforcement 52 gradually increases in the direction from the top plate 512 to the bottom plate 511, thereby effectively strengthening the bottom plate 511, ensuring the load-bearing capacity of the right bracket 5 of the drive motor and improving the structural reliability.

[0065] Exemplarily, in this embodiment, the box-shaped reinforcement member 52 is in the form of a right-angled trapezoid, the inclined surface of the right-angled trapezoid is arranged away from the side plate 513, and at the same time, the bottom large surface of the right-angled trapezoid is welded and fixed to the bottom plate 511, and the side walls perpendicular to the bottom large surface are welded and fixed to the side plates 513, thereby effectively strengthening the bottom plate 511 and further improving the reliability of the overall bracket structure.

[0066] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a right bracket of a driving motor, wherein the box-shaped reinforcement 52 of the right bracket 5 of the driving motor includes a U-shaped plate 521 fixedly connected to both the side plate 513 and the bottom plate 511, and a flat plate 522 fixedly connected to both the side plate 513 and the U-shaped plate 521, and the U-shaped plate 521, the flat plate 522, the side plate 513 and the bottom plate 511 together form a closed box structure.

[0067] The box-shaped reinforcement 52 of the embodiment of the present application includes a U-shaped plate 521 and a flat plate 522. The U-shaped plate 521 is stamped and formed as a whole by a steel plate of suitable strength. The U-shaped plate 521 includes mutually parallel right-angled trapezoidal plates, and a rectangular plate connecting the oblique sides of the two right-angled trapezoidal plates; the flat plate 522 is welded and fixed to the top edges of the two right-angled trapezoidal plates, and the rectangular plate is welded and fixed to the flat plate 522.

[0068] When the box-shaped reinforcement 52 is installed, the bottom edges of the two right-angled trapezoidal plates and the bottom edges of the rectangular plate are welded and fixed to the bottom plate 511, and the side edges of the two right-angled trapezoidal plates and the side edges of the rectangular plate are welded and fixed to the side plates 513, thereby forming a closed box structure, thereby ensuring the reinforcement effect of the box-shaped reinforcement 52.

[0069] In some optional embodiments, see Figures 1 to 5 As shown, the embodiment of the present application provides a right bracket of a driving motor, and the mounting holes of the right bracket 5 of the driving motor include a first mounting hole 5121, a second mounting hole 5122 and a third mounting hole 5123 located on a top plate 512, and the first mounting hole 5121, the second mounting hole 5122 and the third mounting hole 5123 are spaced apart along the X-axis direction of the vehicle;

[0070] Three reinforcing ring pieces 53 are fixedly connected to the top surface of the top plate 512 , which are coaxial with the first mounting hole 5121 , the second mounting hole 5122 , and the third mounting hole 5123 , respectively.

[0071] The top plate 512 of the embodiment of the present application is provided with a first mounting hole 5121, a second mounting hole 5122 and a third mounting hole 5123 which are spaced apart along the X-axis direction of the vehicle. The first mounting hole 5121, the second mounting hole 5122 and the third mounting hole 5123 are used for installing bolts to connect the right longitudinal beam of the vehicle body.

[0072] Three reinforcing ring pieces 53 coaxial with the first mounting hole 5121 , the second mounting hole 5122 and the third mounting hole 5123 are welded and fixed on the top surface of the top plate 512 . The reinforcing ring pieces 53 can enhance the strength around the mounting holes and reduce stress.

[0073] In some optional embodiments, see Figures 1 to 5 As shown, the embodiment of the present application provides a right bracket of a driving motor, and the mounting holes of the right bracket 5 of the driving motor further include a fourth mounting hole 5131, a fifth mounting hole 5132, a sixth mounting hole 5133 and a seventh mounting hole 5134 located on the side plate 513;

[0074] The fourth mounting hole 5131 and the sixth mounting hole 5133 are distributed along the Z-axis direction of the vehicle and are located at the front side of the box-shaped reinforcement 52, and the fifth mounting hole 5132 and the seventh mounting hole 5134 are distributed along the Z-axis direction of the vehicle and are located at the rear side of the box-shaped reinforcement 52;

[0075] The distance between the fourth mounting hole 5131 and the box-shaped reinforcement member 52 is greater than the distance between the fifth mounting hole 5132 and the box-shaped reinforcement member 52 .

[0076] The side panel 513 of the embodiment of the present application is provided with a fourth mounting hole 5131 and a sixth mounting hole 5133 located on the front side of the box-shaped reinforcement 52, as well as a fifth mounting hole 5132 and a seventh mounting hole 5134 located on the rear side of the box-shaped reinforcement 52, for convenient installation of bolts to connect the side wall of the right longitudinal beam of the vehicle body.

[0077] During installation and use, the load on the right bracket 5 of the driving motor mainly comes from the motor assembly 1, and the center of gravity of the motor assembly 1 after installation is located on the rear side of the right bracket 5 of the driving motor. Therefore, the peripheral strength of the fifth mounting hole 5132 and the seventh mounting hole 5134 on the rear side of the box-shaped reinforcement 52 needs to be ensured. Therefore, the fifth mounting hole 5132 and the seventh mounting hole 5134 are arranged closer to the box-shaped reinforcement 52 to meet the modal and stress requirements.

[0078] In some optional embodiments, see Figures 1 to 5 As shown, the embodiment of the present application provides a right bracket of a driving motor, and the mounting holes of the right bracket 5 of the driving motor further include a first assembly hole 5111, a second assembly hole 5112, a third assembly hole 5113 and a fourth assembly hole 5114 located on the bottom plate 511;

[0079] The box-shaped reinforcement member 52 falls on the bottom plate 511 and is away from the two corners of the side plate 513 and the connecting line of the two corners of the bottom plate 511 away from the side plate 513 forms an "eight" shape;

[0080] The first assembly hole 5111 and the second assembly hole 5112 are located on one side of the connecting line, and the third assembly hole 5113 and the fourth assembly hole 5114 are located on the other side of the connecting line.

[0081] The bottom plate 511 of the embodiment of the present application is provided with a first assembly hole 5111, a second assembly hole 5112, a third assembly hole 5113 and a fourth assembly hole 5114, which are used to install bolts to fix the right elastic bracket assembly 6. In order to ensure that the force applied to the bottom plate 511 can be stably transmitted to the positions of the mounting holes of the side plate 513 through the box-shaped reinforcement 52, the first assembly hole 5111, the second assembly hole 5112, the third assembly hole 5113 and the fourth assembly hole 5114 are distributed on the angle connection line formed by the box-shaped reinforcement 52 and the bottom plate 511.

[0082] Specifically, the box-shaped reinforcement 52 falls on the bottom plate 511 and forms an "eight" shape with the connecting line between the two corners away from the side plate 513 and the bottom plate 511 and the two corners away from the side plate 513. The first assembly hole 5111 and the second assembly hole 5112 are located on one side of the connecting line, and the third assembly hole 5113 and the fourth assembly hole 5114 are located on the other side of the connecting line, so that the force transmission path of the right bracket 5 of the drive motor is reasonable, thereby ensuring the structural reliability and load-bearing capacity of the right bracket 5 of the drive motor.

[0083] It should be noted that see Figures 1 to 5 As shown, the technical principle of the present invention is that the right bracket 5 of the driving motor is subjected to the support reaction forces Q1, Q2, Q3, and Q4. The support reaction forces Q1 and Q2 act on the first assembly hole 5111 and the second assembly hole 5112, and the support reaction forces Q3 and Q4 act on the third assembly hole 5113 and the fourth assembly hole 5114; the fixing holes of the right bracket 5 of the driving motor are the first mounting hole 5121, the second mounting hole 5122, the third mounting hole 5123, the fourth mounting hole 5131, the fifth mounting hole 5132, the sixth mounting hole 5133, and the seventh mounting hole 5134.

[0084] That is, the mechanical model of the right bracket 5 of the driving motor is a cantilever structure, and the cantilever lengths are L and M respectively, and the part of the right bracket 5 of the driving motor close to the fixing holes (the first mounting hole 5121, the second mounting hole 5122, the third mounting hole 5123, the fourth mounting hole 5131, the fifth mounting hole 5132, the sixth mounting hole 5133, and the seventh mounting hole 5134) is the root area of ​​the right bracket 5 of the driving motor. In order to obtain a higher modality and higher strength of the right bracket 5 of the driving motor as a whole, the present invention adopts the following technical measures:

[0085] According to the CAE simulation analysis results, the modal enhancement holes (the third assembly hole 5113 and the fourth assembly hole 5114) can enhance the overall modal of the right bracket 5 of the driving motor by about 25%.

[0086] As mentioned above, the box-shaped reinforcement member 52 is composed of a U-shaped plate 521 and a flat plate 522; the U-shaped plate 521 is formed by stamping and welded to the bottom plate 511 and the side plate 513; the flat plate 522 is placed flat on the U-shaped plate 521 and welded to the U-shaped plate 521 and the side plate 513;

[0087] As mentioned above, the box-shaped reinforcement 52, a part of the bottom plate 511, and a part of the side plate 513 form a welded structure, which plays a role in structural reinforcement and modal increase, and is beneficial for transmitting force to the fixing holes (the first mounting hole 5121, the second mounting hole 5122, the third mounting hole 5123, the fourth mounting hole 5131, the fifth mounting hole 5132, the sixth mounting hole 5133, and the seventh mounting hole 5134) of the right bracket 5 of the drive motor.

[0088] In some optional embodiments, see Figures 1 to 5 As shown, the embodiment of the present application provides a right bracket of a driving motor, and the mounting hole of the right bracket 5 of the driving motor further includes a first positioning hole 5118 and a second positioning hole 5119 located on the bottom plate 511, and the first positioning hole 5118 and the second positioning hole 5119 are located on opposite sides of the connecting lines on both sides;

[0089] The first positioning holes 5118 , the first assembly holes 5111 , and the second assembly holes 5112 are distributed in a triangle, and the second positioning holes 5119 , the third assembly holes 5113 , and the fourth assembly holes 5114 are distributed in a triangle.

[0090] The base plate 511 of the embodiment of the present application is also provided with a first positioning hole 5118 and a second positioning hole 5119. After the first positioning hole 5118 and the second positioning hole 5119 are aligned, it can be ensured that the base plate 511 is in the correct installation position, so that the first assembly hole 5111, the second assembly hole 5112, the third assembly hole 5113 and the fourth assembly hole 5114 are convenient for installing bolts to connect the right elastic bracket assembly 6.

[0091] In some optional embodiments, see Figures 1 to 5 As shown, the embodiment of the present application provides a right bracket of a driving motor, wherein a first weight-reducing hole 5135 is provided on the side plate 513 of the right bracket 5 of the driving motor, and a second weight-reducing hole 5117 is provided on the bottom plate 511, and the first weight-reducing hole 5135 and the second weight-reducing hole 5117 intersect and are both connected to the inside of the box-shaped reinforcement 52;

[0092] The step plate 51 extends along the X-axis direction of the vehicle, a first weight-reducing groove 5115 is arranged on the front side of the bottom plate 511, a second weight-reducing groove 5116 is arranged on the rear side, and a third weight-reducing groove 5136 intersecting with the second weight-reducing groove 5116 is arranged on the rear side of the side plate 513.

[0093] The technical principle of setting weight-reducing grooves and weight-reducing holes in the embodiment of the present application is to remove materials in areas with lower stress based on the stress cloud map analyzed by CAE simulation, so as to reduce the weight of parts and achieve the purpose of lightweighting.

[0094] The areas where the first weight reducing hole 5135, the second weight reducing hole 5117, the first weight reducing groove 5115, the second weight reducing groove 5116, and the third weight reducing groove 5136 are located are areas with relatively small stress. The second weight reducing groove 5116 and the third weight reducing groove 5136 are connected together, and the first weight reducing hole 5135 and the second weight reducing hole 5117 are connected together, which can reduce the weight of the right bracket 5 of the drive motor by about 9%.

[0095] Exemplarily, the layout parameters and technical features of the box-shaped reinforcement member 52 of the present application are as follows:

[0096] The width H of the box-shaped reinforcement member 52 is about 80 mm, the length of the upper side F is about 70 mm, the length of the lower side G is about 150 mm, and the angle a between the upper side and the hypotenuse is about 120 degrees; the distance C of the box-shaped reinforcement member 52 to the edge of the bottom plate 511 is about 70 mm, and the distance K to the third assembly hole 5113 is about 30 mm;

[0097] The distance A from the box-shaped reinforcement 52 to the first weight-reducing groove 5115 is approximately 50 mm, and the distance B from the box-shaped reinforcement 52 to the second weight-reducing groove 5116 is approximately 40 mm; the distance D from the box-shaped reinforcement 52 to the fourth mounting hole 5131 and the sixth mounting hole 5133 is approximately 45 mm; the distance E from the box-shaped reinforcement 52 to the fifth mounting hole 5132 and the seventh mounting hole 5134 is approximately 15 mm.

[0098] The preliminary method is to arrange the box-shaped reinforcement member 52 in the middle of the entire step plate 51, and multiple mounting holes on the step plate 51 are arranged around the box-shaped reinforcement member 52. This arrangement can well bear the support reaction force;

[0099] Then, through multiple iterations of CAE simulation analysis, the optimal solution of the above-mentioned layout parameters H, F, G, a, C, K, A, B, D, and E is obtained, which meets the values ​​of the design requirements, thereby obtaining the modal and stress values ​​required for the right bracket 5 of the drive motor; in this application, the mode of the right bracket 5 of the drive motor is greater than 600Hz, and the stress is less than the allowable and tensile stress of the bracket material.

[0100] See also Figure 6 As shown, the second aspect of the embodiment of the present application provides a suspension system, including:

[0101] A vehicle frame, the vehicle frame comprising a left longitudinal beam assembly 10 and a right longitudinal beam assembly 11 which are spaced apart from each other, and a sub-frame assembly 12 which is fixedly connected between the left longitudinal beam assembly 10 and the right longitudinal beam assembly 11;

[0102] The motor assembly 1 is located at the front side of the subframe assembly 12 and between the left longitudinal beam assembly 10 and the right longitudinal beam assembly 11;

[0103] A suspension unit, the suspension unit comprising a left bracket 2 of a driving motor connected to a left longitudinal beam assembly 10, and a right bracket 5 of a driving motor of any of the above embodiments connected to a right longitudinal beam assembly 11;

[0104] A left elastic bracket assembly 3 connected to the left bracket 2 of the driving motor, and a right elastic bracket assembly 6 connected to the right bracket 5 of the driving motor;

[0105] 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;

[0106] A rear suspension bracket 9 connected to the subframe assembly 12 , and a rear suspension assembly 8 connected between the rear suspension bracket 9 and the motor assembly 1 .

[0107] The suspension system of the embodiment of the present application is composed of a motor assembly 1, a left bracket 2 of a driving motor, a left elastic bracket assembly 3, a left bracket 4, a right bracket 5 of a driving motor, a right elastic bracket assembly 6, a right bracket 7, a rear suspension assembly 8, a rear suspension bracket 9, a left longitudinal beam assembly 10, a right longitudinal beam assembly 11, and a subframe assembly 12.

[0108] The left bracket 2 of the driving motor is installed on the left longitudinal beam assembly 10 by bolts; the left elastic bracket assembly 3 is installed on the left bracket 2 of the driving motor by bolts and nuts; the left bracket 4 is installed on the motor assembly 1 by bolts and is connected to the left elastic bracket assembly 3.

[0109] The right bracket 5 of the driving motor is installed on the right longitudinal beam assembly 11 by bolts; the right elastic bracket assembly 6 is installed on the right bracket 5 of the driving motor 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 9.

[0110] The left bracket 4, the right bracket 7, and the rear suspension assembly 8 jointly support the motor assembly 1; the left drive motor bracket 2, the right drive motor bracket 5, and the rear suspension bracket 9 jointly connect the motor assembly 1 to the vehicle body and the subframe; 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.

[0111] The above-mentioned rear suspension assembly 8 not only supports the motor assembly 1, but 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 9, and plays the role of attenuating and isolating the vibration and force transmitted from the motor assembly 1 to the rear suspension bracket 9.

[0112] Among them, the suspension system adopts the right bracket 5 of the drive motor of any of the above-mentioned embodiments. The right bracket 5 of the drive motor has the advantages of simple structure, ingenious design, stable structure, good reliability, strong bearing capacity, light weight, low cost, and easy assembly. The structural strength and modality meet the design requirements, which is conducive to transmitting force to the root and reducing the cost of parts.

[0113] A third aspect of the embodiments of the present application provides a method for designing a suspension system, the method comprising:

[0114] Step S1, obtaining simulation parameters of the suspension system, and using the simulation parameters to construct a simulation model, and performing modal and stress simulation analysis on the simulation model to obtain simulation results;

[0115] Step S2, in the simulation model, obtaining the size parameters of the box-shaped reinforcement member 52 on the right bracket 5 of the driving motor and the position parameters of the mounting holes around the box-shaped reinforcement member 52, and defining the change range of each parameter;

[0116] Step S3, perform simulation iterative optimization on the above parameters. When the right bracket 5 of the drive motor satisfies the preset mode and stress values ​​at the same time, it is considered that the optimization result reaches an acceptable optimal solution. The optimization is ended and the optimal solution is output to obtain the right bracket 5 structure of the drive motor that meets the design requirements.

[0117] In the embodiment of the present application, the box-shaped reinforcement 52 on the right bracket 5 of the driving motor is used as a reference to obtain the position parameters of the mounting holes around the box-shaped reinforcement 52. Specifically, the width H of the box-shaped reinforcement 52 is about 80 mm, the length of the upper side F is about 70 mm, the length of the lower side G is about 150 mm, and the angle a between the upper side and the hypotenuse is about 120 degrees; the distance C from the box-shaped reinforcement 52 to the edge of the bottom plate 511 is about 70 mm, and the distance K to the third assembly hole 5113 is about 30 mm;

[0118] The distance A from the box-shaped reinforcement 52 to the first weight-reducing groove 5115 is approximately 50 mm, and the distance B from the box-shaped reinforcement 52 to the second weight-reducing groove 5116 is approximately 40 mm; the distance D from the box-shaped reinforcement 52 to the fourth mounting hole 5131 and the sixth mounting hole 5133 is approximately 45 mm; the distance E from the box-shaped reinforcement 52 to the fifth mounting hole 5132 and the seventh mounting hole 5134 is approximately 15 mm.

[0119] The preliminary method is to arrange the box-shaped reinforcement member 52 in the middle of the entire step plate 51, and the box-shaped reinforcement member 52 is arranged at the symmetric center of the first mounting hole 5121 and the third mounting hole 5123; the box-shaped reinforcement member 52 is also approximately arranged at the symmetric center of the fourth mounting hole 5131 and the fifth mounting hole 5132; the box-shaped reinforcement member 52 is also approximately arranged at the symmetric center of the first assembly hole 5111 and the third mounting hole 5123; the box-shaped reinforcement member 52 is arranged in this way, so that it can well bear the received support reaction force;

[0120] Then, through multiple iterations of CAE simulation analysis, the optimal solution of the above-mentioned layout parameters H, F, G, a, C, K, A, B, D, and E is obtained, which meets the values ​​required by the design, so that the right bracket 5 of the drive motor meets the modal and stress values ​​required by the design, and thus a right bracket structure that meets the design requirements can be obtained; in this application, the mode of the right bracket 5 of the drive motor is greater than 600Hz, and the stress is less than the allowable and tensile stress of the bracket material.

[0121] 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.

[0122] 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.

[0123] 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 right bracket of a driving motor, characterized in that: include: A step plate (51), the step plate (51) being integrally formed and in a "Z" shape, and the step plate (51) being provided with a plurality of mounting holes located on each plate of the step plate (51); A box-shaped reinforcement member (52), the two ends of which are respectively fixedly connected to two adjacent plates of the step plate (51), and the box-shaped reinforcement member (52) is located in an area surrounded by the plurality of mounting holes.

2. The right bracket of the driving motor according to claim 1, characterized in that: The step plate (51) comprises a top plate (512), a side plate (513) and a bottom plate (511) which are integrally connected, and two ends of the box-shaped reinforcement member (52) are fixedly connected to the side plate (513) and the bottom plate (511) respectively.

3. The right bracket of the driving motor according to claim 2, characterized in that: The bottom plate (511) extends along the Y-axis direction of the vehicle, and the size of the cross section of the box-shaped reinforcement (52) gradually increases in the direction from the top plate (512) to the bottom plate (511); The box-shaped reinforcement member (52) comprises a U-shaped plate (521) fixedly connected to the side plate (513) and the bottom plate (511), and a flat plate (522) fixedly connected to the side plate (513) and the U-shaped plate (521); the U-shaped plate (521), the flat plate (522), the side plate (513) and the bottom plate (511) together form a closed box structure.

4. The right bracket of the driving motor according to claim 2, characterized in that: The mounting holes include a first mounting hole (5121), a second mounting hole (5122) and a third mounting hole (5123) located on the top plate (512), and the first mounting hole (5121), the second mounting hole (5122) and the third mounting hole (5123) are spaced apart along the X-axis direction of the vehicle; Three reinforcing ring plates (53) are fixedly connected to the top surface of the top plate (512) and are coaxial with the first mounting hole (5121), the second mounting hole (5122) and the third mounting hole (5123), respectively.

5. The right bracket of the driving motor according to claim 1, characterized in that: The mounting holes further include a fourth mounting hole (5131), a fifth mounting hole (5132), a sixth mounting hole (5133) and a seventh mounting hole (5134) located on the side plate (513); The fourth mounting hole (5131) and the sixth mounting hole (5133) are distributed along the Z-axis direction of the vehicle and are located on the front side of the box-shaped reinforcement (52); the fifth mounting hole (5132) and the seventh mounting hole (5134) are distributed along the Z-axis direction of the vehicle and are located on the rear side of the box-shaped reinforcement (52); The distance between the fourth mounting hole (5131) and the box-shaped reinforcement (52) is greater than the distance between the fifth mounting hole (5132) and the box-shaped reinforcement (52).

6. The right bracket of the driving motor according to claim 1, characterized in that: The mounting holes further include a first assembly hole (5111), a second assembly hole (5112), a third assembly hole (5113) and a fourth assembly hole (5114) located on the bottom plate (511); The box-shaped reinforcement member (52) falls on the bottom plate (511) and is away from the two corners of the side plate (513), and the connecting line of the two corners of the bottom plate (511) away from the two corners of the side plate (513) forms an "eight" shape; The first assembly hole (5111) and the second assembly hole (5112) are located on the connection line on one side, and the third assembly hole (5113) and the fourth assembly hole (5114) are located on the connection line on the other side.

7. The right bracket of the driving motor according to claim 6, characterized in that: The mounting holes further include a first positioning hole (5118) and a second positioning hole (5119) located on the bottom plate (511), wherein the first positioning hole (5118) and the second positioning hole (5119) are located on opposite sides of the connecting lines at both sides; The first positioning hole (5118), the first assembly hole (5111) and the second assembly hole (5112) are distributed in a triangular shape, and the second positioning hole (5119), the third assembly hole (5113) and the fourth assembly hole (5114) are distributed in a triangular shape.

8. The right bracket of the driving motor according to claim 2, characterized in that: The side plate (513) is provided with a first weight-reducing hole (5135), and the bottom plate (511) is provided with a second weight-reducing hole (5117), wherein the first weight-reducing hole (5135) and the second weight-reducing hole (5117) intersect and are both connected to the interior of the box-shaped reinforcement member (52); The step plate (51) extends along the X-axis direction of the vehicle, a first weight-reducing groove (5115) is arranged on the front side of the base plate (511), a second weight-reducing groove (5116) is arranged on the rear side, and a third weight-reducing groove (5136) intersecting with the second weight-reducing groove (5116) is arranged on the rear side of the side plate (513).

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

10. A method for designing a suspension system, characterized in that: Methods include: Acquire simulation parameters of the suspension system according to claim 9, and use the simulation parameters to construct a simulation model, and perform modal and stress simulation analysis on the simulation model to obtain simulation results; In the simulation model, the size parameters of the box-shaped reinforcement member (52) on the right bracket (5) of the driving motor and the position parameters of the mounting holes around the box-shaped reinforcement member (52) are obtained, and the change range of each parameter is defined; The above parameters are simulated and iteratively optimized. When the right bracket (5) of the drive motor satisfies the preset mode and stress values ​​at the same time, it is considered that the optimization result reaches an acceptable optimal solution. The optimization is terminated and the optimal solution is output to obtain a right bracket (5) structure of the drive motor that meets the design requirements.

Images