Vehicle body mounting system, its design method, and vehicle

Abstract

The present invention discloses a vehicle body mounting system, its design method, and a vehicle, belonging to the technical field of vehicles. The system includes: multiple sets of mounting connection parts provided on a vehicle body cross beam, and multiple sets of mounting brackets provided on a vehicle frame and corresponding to the multiple sets of mounting connection parts one by one. A set of vehicle body mounts is connected between each set of mounting brackets and the corresponding mounting connection parts; the system further includes a plurality of vehicle body mount heat shields fixedly provided on the vehicle frame, and each mounting bracket is covered with a vehicle body mount heat shield. The system isolates the heat radiation received by the vehicle body mounts through the vehicle body mount heat shields, ensuring their durability. At the same time, the layout design of the vehicle body mounts, connection parts, and mounting brackets in the system is more conducive to the stable connection between the vehicle body and the vehicle frame, enabling the vehicle to be more comfortable and stable during driving.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a body mounting system, a design method thereof, and a vehicle. Background Art

[0002] With the popularization of electric vehicles and the gradual acceptance by consumers, more and more electric vehicles have appeared on the streets, and at the same time, multiple markets around the world have successively announced the schedule for phasing out fuel vehicles. In addition to traditional sedan, SUV (sport utility vehicle), and MPV (multi-Purpose Vehicles) models gradually adopting electric drive solutions, electric off-road vehicle models have also successively emerged in people's vision.

[0003] For a hybrid off-road vehicle, the exhaust pipe is arranged below the two longitudinal beams of the frame, and the heat radiated by the exhaust pipe will thermally radiate the body mounts around the exhaust pipe, accelerating the aging of the body mounts, affecting their durability and vehicle stability, and thus affecting the riding experience of passengers. Therefore, it is necessary to design a new body mounting system to solve the problems of poor durability of the body mounts and poor vehicle stability. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed to provide a body mounting system, a design method thereof, and a vehicle that overcome the above problems or at least partially solve the above problems. Through the corresponding design of the body mounts, mount connection parts, and mount mounting brackets, the vehicle stability can be improved, the vibration isolation effect of the body mounts can be fully exerted, making the vehicle more comfortable and stable during driving, thereby improving the riding comfort of passengers. At the same time, by providing a body mount heat shield, the thermal radiation received by the body mounts can be isolated, the service life of the body mounts can be extended, and their durability can be ensured.

[0005] In a first aspect, the present invention provides a body mounting system, including a body, a frame, and multiple groups of body mounts for connecting the body and the frame, wherein the body includes multiple cross beams;

[0006] Multiple groups of mount connection parts for connecting with the body mounts are provided on the body, and one group of mount connection parts is provided on each cross beam. Multiple groups of mount mounting brackets corresponding to the multiple groups of mount connection parts are provided on the frame, and one group of body mounts is connected between each group of mount mounting brackets and the corresponding mount connection part;

[0007] The body mounting system further includes multiple body mount heat shields fixedly arranged on the frame, and one body mount heat shield is provided outside each mount mounting bracket.

[0008] Optionally, each set of the suspension connection parts includes two such suspension connection parts, and the two suspension connection parts are symmetrically arranged at both ends of the cross beam with respect to the Y0 plane of the vehicle.

[0009] Each set of the suspension mounting brackets includes two such suspension mounting brackets, and the two suspension mounting brackets are symmetrically arranged on both sides of the vehicle frame with respect to the Y0 plane of the vehicle.

[0010] Each set of the body suspensions includes two such body suspensions, and the radial direction of each body suspension is parallel to the Z direction of the vehicle.

[0011] Optionally, the body includes five cross beams, and the five cross beams respectively include a radiator cross beam, a floor cross beam in the A-pillar area, a floor cross beam in the B-pillar area, a floor cross beam in the C-pillar area, and a floor cross beam in the D-pillar area, which are arranged in sequence from the front of the vehicle to the rear.

[0012] Five sets of such suspension connection parts are respectively provided on the body corresponding to the five cross beams, five sets of such suspension mounting brackets corresponding to the five sets of suspension connection parts are provided on the vehicle frame, and the body suspension system includes five sets of body suspensions corresponding to the five sets of suspension connection parts one by one.

[0013] Optionally, the five sets of body suspensions include a first set of body suspensions, a second set of body suspensions, a third set of body suspensions, a fourth set of body suspensions, and a fifth set of body suspensions.

[0014] The first set of body suspensions corresponds to the suspension connection parts on the radiator cross beam, the second set of body suspensions corresponds to the suspension connection parts on the floor cross beam in the A-pillar area, the third set of body suspensions corresponds to the suspension connection parts on the floor cross beam in the B-pillar area, the fourth set of body suspensions corresponds to the suspension connection parts on the floor cross beam in the C-pillar area, and the fifth set of body suspensions corresponds to the suspension connection parts on the floor cross beam in the D-pillar area.

[0015] Among them, the first set of body suspensions, the third set of body suspensions, and the fourth set of body suspensions are compression-type body suspensions; the second set of body suspensions and the fifth set of body suspensions are shear-type body suspensions.

[0016] Optionally, through holes for draining water and mud are provided on the body suspension heat shield.

[0017] Optionally, a measuring hole for a vernier caliper to pass through is provided on the suspension mounting bracket.

[0018] Optionally, the body includes a sill beam, and the inner panel of the sill beam has an inclined surface inclined towards the outer panel of the sill beam.

[0019] Optionally, the body mount is connected to the corresponding mount installation bracket and the mount connection portion through a connecting bolt, and the head of the connecting bolt is provided with anti-loosening glue.

[0020] In a second aspect, the present invention provides a design method for a body mount system, which is applicable to the above body mount system, and the design method includes:

[0021] Obtain the mass matrix of the vehicle body, the installation angles and installation position coordinates of each body mount;

[0022] Set the initial dynamic stiffness values of each body mount;

[0023] Determine the stiffness matrix of the body mount according to the installation angle, the installation position coordinates and the initial stiffness value;

[0024] Determine the characteristic matrix of the body mount system according to the stiffness matrix and the mass matrix;

[0025] Determine the decoupling rate of the body mount system according to the characteristic matrix;

[0026] Obtain a preset target decoupling rate;

[0027] Adjust the installation angles, the initial stiffness values and the installation position coordinates of each body mount according to the target decoupling rate to optimize the decoupling rate so that the decoupling rate is equal to the target decoupling rate.

[0028] In a third aspect, the present invention provides a vehicle, which includes the above body mount system.

[0029] The technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:

[0030] A body mount system, its design method and a vehicle provided in the embodiments of the present invention, by arranging multiple groups of mount connection portions on each cross beam of the vehicle body and arranging multiple groups of mount installation brackets corresponding to the multiple groups of mount connection portions on the vehicle frame, so that multiple groups of body mounts can be respectively connected to the corresponding groups of mount installation brackets and mount connection portions, realizing the connection between the vehicle body and the vehicle frame. Since the cross beam is the strongest part of the vehicle body structure, therefore, arranging the body mount at this place can make the connection between the vehicle body and the vehicle frame more stable, and the vehicle is more comfortable and stable when driving, thereby improving the comfort of passengers when riding. At the same time, the body mount system further includes a plurality of body mount heat shields fixedly arranged on the vehicle frame, and each mount installation bracket is covered with a body mount heat shield. After the body mount is installed in the mount installation bracket, the body mount heat shield can isolate the heat radiation received by the body mount, extend the service life of the body mount and ensure its durability.

[0031] The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the following specifically illustrates the specific embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0033] Figure 1 is a schematic side view explosion structure diagram of a body mount system provided by an embodiment of the present invention;

[0034] Figure 2 is a schematic rear view structure diagram of a body assembly provided by an embodiment of the present invention;

[0035] Figure 3 is a schematic top view structure diagram of a frame assembly provided by an embodiment of the present invention;

[0036] Figure 4 is a schematic installation structure diagram of a body mount heat shield provided by an embodiment of the present invention;

[0037] Figure 5 is a schematic installation structure diagram of a compression type body mount provided by an embodiment of the present invention;

[0038] Figure 6 is a schematic installation structure diagram of a shear type body mount provided by an embodiment of the present invention;

[0039] Figure 7 is a schematic cross-sectional view of an inner panel of a sill beam provided by an embodiment of the present invention;

[0040] Figure 8 is a flowchart of a design method for a body mount system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] To make the objectives, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the drawings.

[0042] Now, the body mount system provided by the embodiment of the present invention will be introduced in detail with reference to the drawings.

[0043] The vehicle body of the vehicle body mounting system includes the whole vehicle body such as the body-in-white, opening parts, interior and exterior trims, mechanism parts, air conditioners, etc. The body-in-white includes the upper vehicle body and the lower vehicle body. However, considering that only the lower vehicle body of the vehicle body contains the mounting structure of the vehicle body mounts, in order to introduce the vehicle body mounting system more clearly and in detail, the attached drawings in this embodiment only show the lower vehicle body part of the vehicle body.

[0044] Figure 1 It is a schematic side view exploded structure diagram of a vehicle body mounting system provided by an embodiment of the present invention. As Figure 1 shown, the system includes a vehicle body 100, a vehicle frame 200, and multiple groups of vehicle body mounts 300 for connecting the vehicle body 100 and the vehicle frame 200.

[0045] Figure 2 It is a schematic rear view structure diagram of a vehicle body assembly provided by an embodiment of the present invention. As Figure 2 shown, the vehicle body 100 includes multiple cross beams 110. Multiple groups of mount connection parts 120 for connecting with the vehicle body mounts 300 are provided on the vehicle body 100, and one group of mount connection parts 120 is provided on each cross beam 110. Figure 3 It is a schematic top view structure diagram of a vehicle frame assembly provided by an embodiment of the present invention. As Figure 3 shown, multiple groups of mount mounting brackets 210 corresponding one-to-one to the multiple groups of mount connection parts 120 are provided on the vehicle frame 200. One group of vehicle body mounts 300 is connected between each group of mount mounting brackets 210 and the corresponding mount connection part 120.

[0046] The vehicle body mounting system further includes multiple vehicle body mount heat shields 220 fixedly arranged on the vehicle frame 200 ( Figures 1 to 3 not shown in the figure, see Figure 4 ), and one vehicle body mount heat shield 220 is covered outside each mount mounting bracket 210.

[0047] Figure 4 It is a schematic installation structure diagram of a vehicle body mount heat shield provided by an embodiment of the present invention. As Figure 4 shown, the vehicle body mount heat shield 220 is fixedly installed on the vehicle frame 200 through installation bolts 221. A cavity for accommodating the mount mounting bracket 210 is formed between the vehicle body mount heat shield 220 and the vehicle frame 200, and the mount mounting bracket 210 is located in this cavity, so that the vehicle body mount heat shield 220 can play a heat insulation and protection role for the mount mounting bracket 210. When the vehicle body mounts 300 are installed in the mount mounting brackets 210, the vehicle body mount heat shield 220 can block the heat radiation of the exhaust pipe on the vehicle body mounts 300, and improve the service life of the vehicle body mounts 300.

[0048] Exemplarily, the vehicle body mount heat shield 220 can be made of honeycomb aluminum plate material, which has good corrosion resistance, light weight, and good heat insulation effect.

[0049] Optionally, through holes 220a for draining water and mud are provided on the body mount heat shield 220. The through holes 220a may specifically be located at the bottom of the body mount heat shield 220 to prevent water or mud from accumulating inside the body mount heat shield 220 and affecting the use of the body mount 300.

[0050] Optionally, as Figure 2 shown, each set of mount connection parts 120 includes two mount connection parts, and the two mount connection parts are symmetrically arranged at both ends of the cross beam 110 with respect to the Y0 plane of the vehicle. As Figure 3 shown, each set of mount mounting brackets 210 includes two mount mounting brackets, and the two mount mounting brackets are symmetrically arranged on both sides of the vehicle frame 200 with respect to the Y0 plane of the vehicle.

[0051] Correspondingly, each set of body mounts 300 includes two body mounts (not shown in the figure), and the radial direction of each body mount 300 is parallel to the Z direction of the vehicle.

[0052] In the above implementation, multiple sets of body mounts 300 can be divided into multiple points and respectively arranged between the body and the vehicle frame, which is beneficial to the stable connection between the body and the vehicle frame.

[0053] In this embodiment, the Z direction of the vehicle is the height direction of the vehicle, the X direction is the length direction of the vehicle, the Y direction is the width direction of the vehicle, and the Y0 plane is the left-right central symmetry plane of the whole vehicle. This is a conventional way to establish the vehicle coordinate system in the art and will not be elaborated here.

[0054] Optionally, as Figure 2 shown, the body 100 includes five cross beams 110, and the five cross beams 110 respectively include a radiator cross beam 110a, an A-pillar area floor cross beam 110b, a B-pillar area floor cross beam 110c, a C-pillar area floor cross beam 110d, and a D-pillar area floor cross beam 110e arranged in sequence from the front of the vehicle to the rear of the vehicle.

[0055] Five sets of mount connection parts 120 are respectively provided on the body 100 corresponding to the five cross beams 110. Among them, the five sets of mount connection parts 120 include: a first set of mount connection parts 120a provided on the radiator cross beam 110a, a second set of mount connection parts 120b provided on the A-pillar area floor cross beam 110b, a third set of mount connection parts 120c provided on the B-pillar area floor cross beam 110c, a fourth set of mount connection parts 120d provided on the C-pillar area floor cross beam 110d, and a fifth set of mount connection parts 120e provided on the D-pillar area floor cross beam 110e.

[0056] As Figure 3As shown in the figure, there are five sets of mount installation brackets 210 on the vehicle frame 200 that correspond one-to-one with the five sets of mount connection parts 120. Among them, the five sets of mount installation brackets 210 include: the first set of mount installation brackets 210a corresponding to the first set of mount connection parts 120a, the second set of mount installation brackets 210b corresponding to the second set of mount connection parts 120b, the third set of mount installation brackets 210c corresponding to the third set of mount connection parts 120c, the fourth set of mount installation brackets 210d corresponding to the fourth set of mount connection parts 120d, and the fifth set of mount installation brackets 210e corresponding to the fifth set of mount connection parts 120e.

[0057] As Figure 1 shown, the body mount system 300 includes five sets of body mounts 300 that correspond one-to-one with the five sets of mount connection parts 210. Among them, the five sets of body mounts 300 include: the first set of body mounts 310, the second set of body mounts 320, the third set of body mounts 330, the fourth set of body mounts 340, and the fifth set of body mounts 350.

[0058] The first set of body mounts 310 corresponds to the first set of mount connection parts 120a on the radiator crossmember 110a of the body, the second set of body mounts 320 corresponds to the second set of mount connection parts 120b on the floor crossmember 110b in the A-pillar area, the third set of body mounts 330 corresponds to the third set of mount connection parts 120c on the floor crossmember 110c in the B-pillar area, the fourth set of body mounts 340 corresponds to the fourth set of mount connection parts 120d on the floor crossmember 110d in the C-pillar area, and the fifth set of body mounts 350 corresponds to the fifth set of mount connection parts 120e on the floor crossmember 110e in the D-pillar area.

[0059] Since the radiator crossmember, the floor crossmember in the A-pillar area, the floor crossmember in the B-pillar area, the floor crossmember in the C-pillar area, and the floor crossmember in the D-pillar area of the body belong to the areas with relatively strong structural strength of the body, therefore, setting body mounts in these areas is more conducive to the stable connection between the body and the vehicle frame.

[0060] In this embodiment, since the loads at the first group of body mounts 310, the third group of body mounts 330, and the fourth group of body mounts 340 are relatively large, the first group of body mounts 310, the third group of body mounts 330, and the fourth group of body mounts 340 can adopt compression-type body mounts. The static stiffness characteristic of the compression-type body mount is that the axial stiffness is more than twice the radial stiffness; its limiting characteristic is that it plays a hard limiting role in the ultimate movement of the vehicle body in the X and Y directions. While the loads at the second group of body mounts 320 and the fifth group of body mounts 350 are relatively small, therefore, the second group of body mounts 320 and the fifth group of body mounts 350 can adopt shear-type body mounts. The static stiffness characteristic of the shear-type body mount is that the axial stiffness is equivalent to the radial stiffness; its limiting characteristic is that it plays a hard limiting role in the ultimate movement of the vehicle body in the Z direction. This design can improve the shock absorption effect and stability of the vehicle, making the vehicle more comfortable and stable when driving.

[0061] Figure 5 is a schematic diagram of the installation structure of a compression-type body mount provided by an embodiment of the present invention. As Figure 5 shown, taking the first group of body mounts 310 as an example, the first group of body mounts 310 is a compression-type body mount at this time. The first group of body mounts 310 is connected to the corresponding first group of mount connection parts 120a and the first group of mount mounting brackets 210a through connection bolts 400.

[0062] Figure 6 is a schematic diagram of the installation structure of a shear-type body mount provided by an embodiment of the present invention. As Figure 6 shown, taking the second group of body mounts 320 as an example, the second group of body mounts 320 is a shear-type body mount at this time. The second group of body mounts 320 is connected to the corresponding second group of mount connection parts 120b and the second group of mount mounting brackets 210b through connection bolts 400.

[0063] In this embodiment, each group of body mounts 300 is connected to the corresponding mount mounting bracket 210 and mount connection part 120 through connection bolts 400, and anti-loosening glue is provided at the head of each connection bolt 400. Since the forces at each body mount are relatively large, setting anti-loosening glue at the head of each connection bolt 400 can effectively prevent the bolts from loosening during the durability of the vehicle.

[0064] Optionally, each mount mounting bracket 210 is provided with a measurement hole for a vernier caliper to pass through. For example, as Figure 5 shown, a measurement hole K is correspondingly provided on the first group of mount mounting brackets 210a. The bottom plane of the first group of mount connection parts 120a is directly above the measurement hole K, so that the vernier caliper can pass through the measurement hole K and abut against the bottom plane of the first group of mount connection parts 120a for measurement.

[0065] Due to the increasing requirements for riding comfort, the design of the body mount system needs to consider the accurate measurement of the compression amount of each body mount in the body mount system during the actual vehicle stage, so as to achieve the purpose of comparing and analyzing the actual vehicle state with the design state. However, after analyzing the current off-road vehicle models on the market, it is found that this requirement is not considered in the design of the body mount system, which directly affects all analyses related to stiffness during the actual vehicle stage. Therefore, in this embodiment, by setting measurement holes, it is possible to conveniently measure the compression amount of each body mount with a vernier caliper, solving the problem that the measurement of the body mount compression amount of off-road vehicle models on the current market is inaccurate and affecting the analysis related to stiffness during the actual vehicle stage, thus facilitating meeting the requirements for user riding comfort during actual vehicle design.

[0066] Optionally, as Figure 1 shown, the vehicle body 100 further includes a sill beam 130. Figure 7 FIG. is a schematic cross-section of an inner panel of a sill beam provided by an embodiment of the present invention. As Figure 7 shown, the inner panel of the sill beam 130 has an inclined surface 131 that inclines towards the outer panel side of the sill beam 130. After the body mount 300 is connected to the mount connection portion 120 on the vehicle body 100, the inclined surface 131 that inclines towards the outer panel side of the sill beam 130 can form an avoidance space to avoid the body mount 300.

[0067] Since an electric vehicle relies on a battery pack to provide power, the battery pack will be arranged between the vehicle frames. If one wants to improve the vehicle's endurance, more battery cells need to be added, and then the battery pack will occupy a relatively large chassis space. However, this will cause the layout space of the body mount system, which connects the two components of the vehicle frame and the vehicle body of a frame-connected off-road vehicle, to be compressed, thus directly affecting the overall vehicle vibration level and the human vibration comfort feeling. Therefore, in this embodiment, by providing an inclined surface on the inner panel of the sill beam and designing the inclined surface away from the body mount direction, it not only has the function of avoiding the body mount but also can increase the chassis space, thereby reducing the occupancy rate of the chassis space in the Y0 direction by the body mount system, facilitating the arrangement of the battery pack, and improving the utilization rate of the chassis space.

[0068] In an off-road vehicle model, the entire vehicle body is completely supported by the body mount system, and the decoupling rate of the body mount system directly affects the low-frequency vibration state of the vehicle body; especially in an electrified vehicle, without the vibration of the engine, people have higher requirements for riding comfort. Therefore, a design method for a body mount system that takes into account the decoupling rate is needed.

[0069] Therefore, based on the same inventive concept, an embodiment of the present invention further provides a design method for a body mount system, and this method is applicable to the body mount system described in the above embodiment.

[0070] Figure 8It is a flowchart of a design method for a vehicle body mounting system provided by an embodiment of the present invention. The design method includes:

[0071] Step S801: Obtain the mass matrix of the vehicle body, the installation angles and installation position coordinates of each vehicle body mount.

[0072] Among them, the method for obtaining the mass matrix of the vehicle body is a conventional technical means in the art. For example, the finite element method for vehicle body modal calculation and analysis can be used to divide the continuous vehicle body structure into finite discrete units through mesh division, and then the mass matrix is integrated and established in the software. This embodiment will not elaborate here.

[0073] In this embodiment, a vehicle coordinate system is first established. The Z direction of the vehicle is the height direction of the vehicle, the X direction is the length direction of the vehicle, the Y direction is the width direction of the vehicle, and the Y0 plane is the left-right central symmetry plane of the whole vehicle. This is a conventional way to establish a vehicle coordinate system in the art and will not be elaborated here.

[0074] In this embodiment, according to the arrangement method of each vehicle body mount in the vehicle body mounting system, the angles between the three elastic axes U, V, and W of each vehicle body mount and the X direction, Y direction, and Z direction can be determined, so as to obtain the installation angles of each vehicle body mount; the installation position coordinates of each vehicle body mount in the vehicle coordinate system can also be obtained according to the specific arrangement positions of each vehicle body mount.

[0075] In this embodiment, the vehicle body mounting system described in the above embodiment includes five groups of vehicle body mounts, and each group of vehicle body mounts includes 2 vehicle body mounts, that is, a total of 10 vehicle body mounts. Table 1 is a record table of the installation angles of a vehicle body mount provided by an embodiment of the present invention. As shown in Table 1, the installation angles of the 10 vehicle body mounts in this embodiment are as follows:

[0076] Table 1

[0077]

[0078] Table 2 is a record table of the installation position coordinates of a vehicle body mount provided by an embodiment of the present invention. As shown in Table 2, the installation position coordinates of the 10 mounts in this embodiment are as follows:

[0079] Table 2

[0080]

[0081] Step S802: Set the initial dynamic stiffness values of each vehicle body mount.

[0082] In this embodiment, the dynamic stiffness values of each body mount under a set load W under low-frequency vibration are initially defined, that is, the initial dynamic stiffness values of each body mount. Among them, the value of the set load W can be set according to the actual situation, and the present invention does not limit this.

[0083] Table 3 is a record table of the initial dynamic stiffness values of a body mount provided in an embodiment of the present discovery. As shown in Table 3, the initial dynamic stiffness values of the 10 body mounts in this embodiment are as follows:

[0084] Table 3

[0085] U V W First suspension 330 330 578 Second suspension 1722 1722 1596 Third suspension 647 647 878 Fourth suspension 340 340 1184 Fifth suspension 1710 1710 1592 Sixth suspension 330 330 578 Seventh suspension 1722 1722 1596 Eighth suspension 647 647 878 Ninth suspension 340 340 1184 Tenth suspension 1710 1710 1592

[0086] Step S803: Determine the stiffness matrix of the body mount according to the installation angle, installation position coordinates, and initial stiffness value.

[0087] In this embodiment, the stiffness matrix of the body mount can be calculated according to Formula (1), Formula (2), and Formula (3).

[0088] Among them, Formula (1) is:

[0089]

[0090] Formula (2) is:

[0091]

[0092] Formula (3) is:

[0093]

[0094] Among them, K is the stiffness matrix of the body mount, and k i is the stiffness value of the i-th body mount when vibrating at a certain low frequency, and B i is the position transfer matrix of the i-th body mount, is the transpose matrix of B i T i is the direction cosine matrix of the i-th body mount, is the transpose matrix of T i x i y i z i are the installation point coordinates of the i-th body mount.

[0095] Step S804: Determine the characteristic matrix of the body mount system according to the stiffness matrix and the mass matrix.

[0096] In this embodiment, the characteristic matrix of the body mount system can be calculated according to Formula (4). Among them, Formula (4) is:

[0097] A = ω 2 = M ―1 K; (4)

[0098] Wherein, A is the characteristic matrix of the vehicle body mounting system, ω is the system mode of the vehicle body mounting system, M is the mass matrix of the vehicle body mounting, and K is the stiffness matrix of the vehicle body mounting.

[0099] Table 4 shows the characteristic matrix of a vehicle body mounting system provided by an embodiment of the present invention, and the characteristic matrix is as follows:

[0100] Table 4

[0101] 7915 9.69705E-13 1.08E-12 4.882E-13 -4026.712202 37.59625 9.697E-13 7915 1.08E-12 4026.7122 -4.70064E-13 78.731333 1.08E-12 1.07987E-12 9713.3333 -46.13833 458.5706667 -1.81E-14 -134.3215 11412.07428 -114.8967 19970.883 687.7868547 -516.565 -4264.19 1385709445 484.0365 239.7101 21440.87936 -17.69182 26.719298 511.0906623 -4.236043 -91.86836 18.25650804 18105.818

[0102] Step S805: Calculate the decoupling rate of the vehicle body mounting system according to the characteristic matrix.

[0103] In this embodiment, first calculate the eigenvalues and eigenvectors V of the characteristic matrix A, and calculate the value of ω. Then, according to formula (5), calculate the six-degree-of-freedom decoupling rate of the vehicle body mounting system. Among them, formula (5) is:

[0104]

[0105] Where j, k, l = 1, 2, 3, 4, 5, 6, and P is the energy distribution matrix.

[0106] Table 5 shows the six-degree-of-freedom decoupling rate of a vehicle body mounting system provided by an embodiment of the present invention, as shown in Table 5:

[0107] Table 5

[0108]

[0109] Step S806: Obtain a preset target decoupling rate.

[0110] In this embodiment, the target decoupling rate can be determined according to the relevant requirements of each vehicle factory for the decoupling rate, and the specific value of the target decoupling rate is not limited in this embodiment.

[0111] Step S807: Adjust the installation angle, initial stiffness value, and installation position coordinates of each vehicle body mounting according to the target decoupling rate to optimize the decoupling rate so that the decoupling rate is equal to the target decoupling rate.

[0112] In this embodiment, arrange the vehicle body mountings in the vehicle body mounting system according to the adjusted installation angle, initial stiffness value, and installation position coordinates of the vehicle body mountings, so that the decoupling level of the whole vehicle meets the requirements.

[0113] An embodiment of the present invention further provides a vehicle, including the body mounting system described in the above embodiment. For the specific structure of the body mounting system, reference may be made to the relevant description of the above embodiment, which will not be elaborated herein.

[0114] The technical solutions in the above embodiments of the present application at least have the following technical effects or advantages:

[0115] A body mounting system, its design method, and a vehicle provided by an embodiment of the present invention connect multiple groups of mounting connection parts on each cross beam of the body, and set multiple groups of mounting brackets on the vehicle frame corresponding to the multiple groups of mounting connection parts one by one, so that multiple groups of body mountings can be respectively connected to the corresponding groups of mounting brackets and mounting connection parts to realize the connection between the body and the vehicle frame. Since the cross beam is the strongest part of the body structure, setting the body mounting at this position can make the connection between the body and the vehicle frame more stable, and the vehicle is more comfortable and stable during driving, thereby improving the comfort of passengers. At the same time, the body mounting system further includes a plurality of body mounting heat shields fixedly arranged on the vehicle frame, and each mounting bracket is covered with a body mounting heat shield. After the body mounting is installed in the mounting bracket, the body mounting heat shield can isolate the heat radiation received by the body mounting, extend the service life of the body mounting, and ensure its durability.

[0116] In the specification provided herein, a large number of specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure the understanding of this description.

[0117] Similarly, it should be understood that, in order to simplify the present disclosure and assist in understanding one or more of the various inventive aspects, in the foregoing description of the exemplary embodiments of the invention, the various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that: the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all the features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0118] It should be noted that the above embodiments are illustrative of the present invention and not restrictive thereof, and alternative embodiments can be designed by those skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim listing several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

Claims

1. A body mounting system, comprising a vehicle body, a vehicle frame, and multiple groups of body mounts for connecting the vehicle body and the vehicle frame, wherein the vehicle body includes multiple cross beams, and is characterized in that, multiple groups of mount connection parts for connecting with the body mounts are provided on the vehicle body, one group of mount connection parts is provided on each cross beam, multiple groups of mount mounting brackets corresponding to the multiple groups of mount connection parts are provided on the vehicle frame, and one group of body mounts is connected between each group of mount mounting brackets and the corresponding mount connection part; the body mounting system further includes multiple body mount heat shields fixedly arranged on the vehicle frame, and each mount mounting bracket is covered with a body mount heat shield; the vehicle body includes five cross beams, and the five cross beams respectively include a radiator cross beam, a floor cross beam in the A-pillar area, a floor cross beam in the B-pillar area, a floor cross beam in the C-pillar area, and a floor cross beam in the D-pillar area, which are arranged in sequence from the vehicle head to the vehicle tail; five groups of mount connection parts corresponding to the five cross beams are respectively provided on the vehicle body, five groups of mount mounting brackets corresponding to the five groups of mount connection parts are provided on the vehicle frame, and the body mounting system includes five groups of body mounts corresponding to the five groups of mount connection parts; the five groups of body mounts include a first group of body mounts, a second group of body mounts, a third group of body mounts, a fourth group of body mounts, and a fifth group of body mounts; the first group of body mounts corresponds to the mount connection part on the radiator cross beam, the second group of body mounts corresponds to the mount connection part on the floor cross beam in the A-pillar area, the third group of body mounts corresponds to the mount connection part on the floor cross beam in the B-pillar area, the fourth group of body mounts corresponds to the mount connection part on the floor cross beam in the C-pillar area, and the fifth group of body mounts corresponds to the mount connection part on the floor cross beam in the D-pillar area; wherein, the first group of body mounts, the third group of body mounts, and the fourth group of body mounts are compression-type body mounts; the second group of body mounts and the fifth group of body mounts are shear-type body mounts; through holes for draining water and mud are provided on the body mount heat shield.

2. The system according to claim 1, wherein Each group of mount connection parts includes two mount connection parts, and the two mount connection parts are symmetrically arranged at both ends of the cross beam with respect to the Y0 plane of the vehicle; Each group of mount mounting brackets includes two mount mounting brackets, and the two mount mounting brackets are symmetrically arranged on both sides of the vehicle frame with respect to the Y0 plane of the vehicle; Each group of body mounts includes two body mounts, and the radial direction of each body mount is parallel to the Z direction of the vehicle.

3. The system according to claim 1, characterized in that, A measurement hole for a vernier caliper to pass through is provided on the mount mounting bracket.

4. The system according to claim 1, wherein The vehicle body includes a sill beam, and the inner panel of the sill beam has an inclined surface inclined towards the outer panel of the sill beam.

5. The system according to claim 1, wherein The body mount is connected to the corresponding mount mounting bracket and mount connection part through a connection bolt, and anti-loosening glue is provided on the head of the connection bolt.

6. A design method for a vehicle body mounting system, characterized in that The design method is applicable to the body mounting system according to any one of claims 1-5, and the design method includes: Obtain the mass matrix of the vehicle body, the installation angles and the installation position coordinates of each vehicle body mount; Set the initial dynamic stiffness values of each vehicle body mount; Determine the stiffness matrix of the vehicle body mount according to the installation angle, the installation position coordinates and the initial stiffness value; Determine the characteristic matrix of the vehicle body mount system according to the stiffness matrix and the mass matrix; Determine the decoupling rate of the vehicle body mount system according to the characteristic matrix; Obtain a preset target decoupling rate; Adjust the installation angle, the initial stiffness value and the installation position coordinates of each vehicle body mount according to the target decoupling rate to optimize the decoupling rate so that the decoupling rate is equal to the target decoupling rate.

7. A vehicle, characterized in that, The vehicle includes the vehicle body mount system according to any one of claims 1-5.

Images