Driving motor rear suspension and suspension system

Abstract

The invention relates to a drive motor rear suspension and suspension system, and the suspension system comprises a suspension skeleton which comprises an outer sleeve and a connecting steel plate, the connecting steel plate is provided with an arc groove matched with the outer wall surface of the outer sleeve, and a metal pipe used for being connected with a motor assembly is fixed to the end, away from the arc groove, of the connecting steel plate; and the suspension cushion is pressed in the outer sleeve in an interference manner and comprises an inner limiting pipe and a damping rubber body located in the inner limiting pipe, an inner limiting framework is connected in the damping rubber body, and an inner sleeve is embedded in the inner limiting framework. The suspension framework is formed by connecting the outer sleeve, the connecting steel plate and the metal pipe into a whole, the structure is simplified, the structural strength is high, light weight is achieved, and the modal and strength requirements of the suspension framework are met. And the assembly manufacturability is improved, and the spatial arrangement requirement is met. An inner limiting pipe and an inner limiting framework are arranged outside and inside a damping rubber body of the suspension cushion respectively, the deformation displacement of the damping rubber body is limited, and the requirements for reliability and durability of the suspension cushion are met.

Description

Technical Field

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

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

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

[0004] Based on the above-mentioned technical characteristics of the electric vehicle suspension system, if the suspension system is improperly designed, faults such as damage to the suspension pad or breakage of the suspension bracket will often occur, affecting the durability and reliability of the suspension system, and thus affecting the durability and reliability of the entire vehicle.

[0005] In order to obtain higher mode and strength, the rear suspension of the drive motor in the suspension system is difficult to design with sheet metal welded parts due to space limitations and assembly process requirements. It occupies a large space, is difficult to process, and is prone to breakage. The stiffness of the soft pad of the rear suspension of the drive motor is too low and there is no effective limit, which will cause excessive displacement and will be torn and damaged under long-term operation, affecting the reliability of the suspension system. Summary of the invention

[0006] The embodiment of the present application provides a drive motor rear suspension and suspension system to solve the problem in the related art that the design structure of the rear suspension frame using sheet metal welded parts is difficult, occupies a large space, is difficult to process, and is easy to break.

[0007] A first aspect of an embodiment of the present application provides a drive motor rear suspension, comprising:

[0008] A suspension frame, the suspension frame comprising an outer sleeve and a connecting steel plate fixedly connected to the outer sleeve, the connecting steel plate being provided with an arc groove adapted to the outer wall surface of the outer sleeve, and a metal pipe for connecting to the motor assembly being fixed at one end of the connecting steel plate away from the arc groove;

[0009] A suspension cushion is interference-pressed in the outer sleeve, comprising an inner limiting tube, a shock-absorbing colloid in the inner limiting tube, an inner limiting frame connected to the shock-absorbing colloid, and an inner sleeve embedded in the inner limiting frame with both ends exposed outside the inner limiting frame.

[0010] In some implementations: the connecting steel plate is vertically connected to the outer wall of the outer sleeve and is located in the middle of the outer sleeve, a plurality of the metal tubes are provided, the plurality of the metal tubes are connected to the connecting steel plate through and are spaced apart from each other, and the plurality of the metal tubes are welded to the connecting steel plate or integrally cast into a structure.

[0011] In some implementations: the wall thickness of the metal tube and the wall thickness of the connecting steel plate are both 6-10 mm, the outer sleeve is formed by seamless steel tube, the wall thickness of the outer sleeve is 4-6 mm, multiple metal tubes are located on the same arc line on the connecting steel plate, the axes of the multiple metal tubes are parallel to the axis of the outer sleeve, and the arc angle of the arc groove is greater than or equal to 180°.

[0012] In some implementations: the shock-absorbing colloid includes an outer envelope body in an annular structure and an inner envelope body in an annular structure, the inner envelope body is located inside the outer envelope body and is coaxially arranged with each other, and a plurality of shock-absorbing main ribs arranged at circumferential intervals are connected between the outer envelope body and the inner envelope body;

[0013] The outer envelope is connected to the plurality of shock-absorbing main ribs as a whole and is vulcanized into one with the inner limit tube, and the inner envelope is wrapped around the outer periphery of the inner limit skeleton and is connected to the plurality of shock-absorbing main ribs as a whole.

[0014] In some implementations: the shock-absorbing colloid further includes two main anti-collision blocks respectively connected to the outer envelope and arranged in a central symmetrical manner, and the main anti-collision blocks are located in the gap between two adjacent shock-absorbing main ribs;

[0015] The shock-absorbing colloid further comprises two auxiliary anti-collision blocks which are respectively connected to the outer envelope and are centrally symmetrically arranged. The auxiliary anti-collision blocks are located in the gap between two adjacent shock-absorbing main ribs.

[0016] In some implementations: two symmetrically arranged first protrusions and two symmetrically arranged second protrusions are provided on the side wall of the inner limit frame, the end area of ​​the first protrusion is greater than or equal to the end area of ​​the second protrusion, and the protruding height of the second protrusion is greater than or equal to the protruding height of the first protrusion;

[0017] The first protrusion is located in the gap between two adjacent shock-absorbing main ribs and is opposite to the main anti-collision block, and the second protrusion is located in the gap between two adjacent shock-absorbing main ribs and is opposite to the auxiliary anti-collision block.

[0018] In some implementations: the gap between the main anti-collision block and the inner envelope is greater than or equal to the gap between the secondary anti-collision block and the inner envelope, and the contact area between the main anti-collision block and the inner envelope is greater than or equal to the contact area between the secondary anti-collision block and the inner envelope.

[0019] In some implementations: two anti-collision bosses are centrally symmetrically arranged on the inner wall of the inner limit tube, the inner limit tube and the anti-collision bosses are an integrally processed and molded structure of aluminum alloy material, and the anti-collision bosses are used to radially support the main anti-collision block.

[0020] In some implementations: the inner limit frame is made of nylon, the inner sleeve is an aluminum alloy tube structure, the inner sleeve and the inner limit frame are connected as one by injection molding, and the outer wall of the inner sleeve is provided with a plurality of tooth grooves embedded in the inner limit frame;

[0021] A positioning hole is provided at one end of the inner limit frame, and an inner hole penetrating through both ends of the inner sleeve is provided in the inner sleeve, and the axes of the positioning hole and the inner hole are parallel.

[0022] A second aspect of an embodiment of the present application provides a suspension system, including:

[0023] 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;

[0024] 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;

[0025] A suspension unit, the suspension unit comprising a left bracket connected to the left longitudinal beam assembly and a right bracket connected to the right longitudinal beam assembly;

[0026] A left elastic bracket assembly connected to the left bracket, and a right elastic bracket assembly connected to the right bracket;

[0027] 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;

[0028] A rear suspension bracket connected to the subframe assembly, and a drive motor rear suspension as described in any of the above embodiments connected between the rear suspension bracket and the motor assembly.

[0029] The beneficial effects of the technical solution provided by this application include:

[0030] The embodiment of the present application provides a drive motor rear suspension and suspension system. Since the drive motor rear suspension of the present application is provided with a suspension frame, the suspension frame includes an outer sleeve and a connecting steel plate fixedly connected to the outer sleeve, the connecting steel plate is provided with an arc groove adapted to the outer wall surface of the outer sleeve, and a metal tube for connecting the motor assembly is fixed to the end of the connecting steel plate away from the arc groove; a suspension cushion is interference-pressed in the outer sleeve, including an inner limit tube, a shock-absorbing colloid located in the inner limit tube, the shock-absorbing colloid is connected to the inner limit frame, and the inner sleeve is embedded in the inner limit frame with both ends exposed to the outside of the inner limit frame.

[0031] Therefore, the suspension frame of the rear suspension of the driving motor of the present application is connected as a whole by an outer sleeve, a connecting steel plate and a metal tube. The connecting steel plate and the metal tube can be welded or cast into one, which has a simplified structure and high structural strength, and can achieve lightweight and meet the modal and strength requirements of the suspension frame. It also improves the assembly processability and meets the space layout requirements. An arc groove that matches the outer wall surface of the outer sleeve is opened on the connecting steel plate. The outer sleeve is located in the arc groove and is welded to the connecting steel plate, so that the structure of the suspension frame is simple, reliable, low-cost, easy to manufacture, and easy to assemble. The outside and inside of the shock-absorbing colloid of the suspension cushion are respectively provided with an internal limit tube and an internal limit frame. When the motor assembly is in the maximum torque condition, the deformation displacement of the shock-absorbing colloid is limited to meet the reliability and durability requirements of the suspension cushion. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 This is a schematic diagram of the structure of the rear suspension of the driving motor according to an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the structure of a suspension frame according to an embodiment of the present application;

[0035] Figure 3 This is a schematic diagram of the structure of the suspended cushion of an embodiment of the present application;

[0036] Figure 4 This is a schematic diagram of the structure of the inner limit tube of an embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the structure of the shock-absorbing colloid of an embodiment of the present application;

[0038] Figure 6 This is a schematic diagram of the structure of the inner limit frame of an embodiment of the present application;

[0039] Figure 7 This is a schematic diagram of the structure of a metal tube according to an embodiment of the present application;

[0040] Figure 8 This is a structural front view of the rear suspension of the driving motor according to an embodiment of the present application;

[0041] Fig. 9 This is a schematic diagram of the structure of the connection between the rear suspension of the driving motor and the motor assembly in an embodiment of the present application;

[0042] Fig.10 Schematic diagram of the structure of the suspension system of the embodiment of the present application.

[0043] Reference numerals:

[0044] 1. Motor assembly; 2. Left bracket; 3. Left elastic bracket assembly; 4. Left bracket; 5. Right bracket; 6. Right elastic bracket assembly; 7. Right bracket; 8. Drive motor rear suspension; 9. Rear suspension bracket; 10. Left longitudinal beam assembly; 11. Right longitudinal beam assembly; 12. Subframe assembly;

[0045] 81. Suspension frame; 82. Suspension cushion; 811. Metal pipe; 812. Connecting steel plate; 813. Outer sleeve; 821. Inner limit pipe; 822. Shock-absorbing colloid; 823. Inner limit frame; 824. Inner sleeve; 8211. Anti-collision boss;

[0046] 8221, shock-absorbing main rib; 8222, main anti-collision block; 8223, auxiliary anti-collision block; 8224, outer envelope; 8225, inner envelope; 8231, positioning hole; 8232, first protrusion; 8233, second protrusion; 8241, inner hole; 8242, tooth groove. DETAILED DESCRIPTION

[0047] 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.

[0048] The embodiment of the present application provides a drive motor rear suspension and suspension system, which can solve the problem in the related art that the design structure of the rear suspension frame using sheet metal welded parts is difficult, occupies a large space, is difficult to process, and is easy to break.

[0049] See also Figures 1 to 3 As shown, the first aspect of the embodiment of the present application provides a drive motor rear suspension, including:

[0050] The suspension frame 81 includes an outer sleeve 813 and a connecting steel plate 812 fixedly connected to the outer sleeve 813. The connecting steel plate 812 is provided with an arc groove adapted to the outer wall surface of the outer sleeve 813. The end of the connecting steel plate 812 away from the arc groove is fixed with a metal pipe 811 for connecting the motor assembly 1. The metal pipe 811 and the outer sleeve 813 are both connected to the connecting steel plate 812 as a whole. The connecting steel plate 812 is perpendicular to the axis of the metal pipe 811, and the connecting steel plate 812 is parallel to the longitudinal plane ZOX of the whole vehicle. The connecting steel plate 812 is arranged at an axially symmetrical position of the outer sleeve 813.

[0051] The suspension cushion 82 is press-fitted into the outer sleeve 813 by interference fit, and the suspension cushion 82 includes an inner limit tube 821, a shock-absorbing colloid 822 located in the inner limit tube 821, an inner limit frame 823 connected to the shock-absorbing colloid 822, and an inner sleeve 824 with both ends exposed outside the inner limit frame 823 embedded in the inner limit frame 823. The suspension cushion 82 is vulcanized into a whole and then installed into the outer sleeve 813 of the suspension frame 81 by press-fitting; the beneficial effects of such a process are that the shock-absorbing colloid 822 of the suspension cushion 82 is avoided from being damaged when the suspension frame 81 is welded; the suspension cushion 82 only needs to be vulcanized separately, which reduces the volume of the vulcanization mold; the suspension frame 81 and the suspension cushion 82 are produced separately and then assembled together, which can also improve production efficiency.

[0052] The suspension frame 81 of the rear suspension 8 of the driving motor of the embodiment of the present application is connected as a whole by an outer sleeve 813, a connecting steel plate 812 and a metal tube 811. The connecting steel plate 812 and the metal tube 811 can be welded or cast as a whole, which has a simplified structure, high structural strength, lightweight and meets the modal and strength requirements of the suspension frame. An arc groove matching the outer wall surface of the outer sleeve 813 is provided on the connecting steel plate 812. The outer sleeve 813 is located in the arc groove and is welded to the connecting steel plate 812, so that the structure of the suspension frame 81 is simple, reliable, low cost, easy to manufacture, and easy to assemble.

[0053] The shock-absorbing colloid 822 of the suspension cushion 82 is provided with an inner limit tube 821 and an inner limit frame 823 on the outside and inside respectively. When the motor assembly 1 is in the maximum torque condition, the inner limit tube 821 and the inner limit frame 823 limit the deformation displacement of the shock-absorbing colloid 822, so as to meet the reliability and durability requirements of the suspension cushion 82. The shock-absorbing colloid 822 is made of rubber NR material, and is used to buffer the vibration impact force generated by the motor assembly 1.

[0054] In some optional implementations: See Figure 1 and Figure 2As shown, the embodiment of the present application provides a drive motor rear suspension, wherein the connecting steel plate 812 of the drive motor rear suspension 8 is vertically connected to the outer wall surface of the outer sleeve 813 and is located in the middle of the outer sleeve 813. Three metal tubes 811 are provided, and the three metal tubes 811 are all connected to the connecting steel plate 812 and are arranged at intervals from each other. The three metal tubes 811 are welded to the connecting steel plate 812 or are integrally cast.

[0055] The wall thickness of the metal tube 811 and the wall thickness of the connecting steel plate 812 are both 6-10 mm, preferably 8 mm, the outer sleeve 813 is formed by processing a seamless steel tube, the wall thickness of the outer sleeve 813 is 4-6 mm, preferably 5 mm, and the three metal tubes 811 are located on the same arc line on the connecting steel plate 812. The axes of the three metal tubes 811 are all parallel to the axis of the outer sleeve 813, and the arc angle of the arc groove is greater than or equal to 180°, preferably 270°, so that the outer sleeve 813 can be positioned in the arc groove in the X direction and the Z direction, thereby improving the connection strength and stability between the outer sleeve 813 and the connecting steel plate 812.

[0056] Since the distance between the motor assembly 1 and the subframe assembly 12 in the X direction of the vehicle is very small, and in order to improve the assembly processability of the suspension system, the axis of the inner limit tube 821 of the drive motor rear suspension 8 is parallel to the Y direction of the vehicle; therefore, it is difficult to design the suspension frame 81 of the drive motor rear suspension 8 as a sheet metal welding structure; in order to overcome the above technical difficulties, the suspension frame 81 is designed as a structure of a metal tube 811 and a connecting steel plate 812, which is simpler in structure and lightweight.

[0057] The wall thickness of the metal tube 811 and the wall thickness of the connecting steel plate 812 are both 6-10mm, preferably 8mm; at the same time, in order to leave a sufficient safety distance between the drive motor rear suspension 8 and the sub-frame assembly 12, the safety distance is ≥20mm, an arc groove adapted to the outer wall surface of the outer sleeve 813 is opened on the connecting steel plate 812, and the outer sleeve 813 adopts a seamless steel pipe with a wall thickness of 4-5mm, which can increase the gap between the drive motor rear suspension 8 and the sub-frame assembly 12 in the X-axis direction.

[0058] In some optional implementations: See Figure 3 and Figure 5 As shown, the embodiment of the present application provides a drive motor rear suspension, wherein the damping colloid 822 of the drive motor rear suspension 8 includes an outer envelope 8224 in an annular structure and an inner envelope 8225 in an annular structure. The inner envelope 8225 is located inside the outer envelope 8224 and is coaxially arranged with each other, and four circumferentially spaced damping main ribs 8221 are connected between the outer envelope 8224 and the inner envelope 8225.

[0059] The outer envelope 8224 is connected to the four shock-absorbing main ribs 8221 as a whole and is vulcanized into one with the inner limit tube 821. The inner envelope 8225 is wrapped around the outer periphery of the inner limit frame 823 and is connected to the four shock-absorbing main ribs 8221 as a whole. The four shock-absorbing main ribs 8221 are radially arranged in the annular space formed by the outer envelope 8224 and the inner envelope 8225, and a gap is formed between two adjacent shock-absorbing main ribs 8221. The axes of the four shock-absorbing main ribs 8221 form a "cross" structure.

[0060] In some optional implementations: See Figures 3 to 9 As shown, the embodiment of the present application provides a drive motor rear suspension, and the damping colloid 822 of the drive motor rear suspension 8 also includes two main anti-collision blocks 8222 respectively connected to the outer envelope 8224 and arranged in a central symmetric manner, and the main anti-collision block 8222 is located in the gap between two adjacent damping main ribs 8221. The damping colloid 822 also includes two auxiliary anti-collision blocks 8223 respectively connected to the outer envelope 8224 and arranged in a central symmetric manner, and the auxiliary anti-collision block 8223 is located in the gap between two adjacent damping main ribs 8221.

[0061] Two symmetrically arranged first protrusions 8232 and two symmetrically arranged second protrusions 8233 are arranged on the side wall of the inner limit frame 823. The end area of ​​the first protrusion 8232 is greater than or equal to the end area of ​​the second protrusion 8233, and the protruding height of the second protrusion 8233 is greater than or equal to the protruding height of the first protrusion 8232. The first protrusion 8232 is located in the gap between two adjacent shock-absorbing main ribs 8221 and is opposite to the main anti-collision block 8222 and is arranged at a distance from each other.

[0062] The main anti-collision block 8222 cooperates with the first protrusion 8232 to limit the deformation displacement of the shock-absorbing main rib 8221. The second protrusion 8233 is located in the gap between two adjacent shock-absorbing main ribs 8221 and is opposite to the auxiliary anti-collision block 8223 and is spaced apart from each other. The auxiliary anti-collision block 8223 cooperates with the second protrusion 8233 to limit the deformation displacement of the shock-absorbing main rib 8221.

[0063] See also Figure 8 As shown, the gap between the main anti-collision block 8222 and the inner envelope 8225 is greater than or equal to the gap between the secondary anti-collision block 8223 and the inner envelope 8225, so that when the main anti-collision block 8222 and the secondary anti-collision block 8223 are subjected to the same impact force, the secondary anti-collision block 8223 contacts the inner envelope 8225 before the main anti-collision block 8222, so that the shock-absorbing main rib 8221 preferentially buffers the torsional moment applied by the motor assembly 1. The gap between the main anti-collision block 8222 and the inner envelope 8225 is the main working stroke of the shock-absorbing colloid 822, and the gap between the secondary anti-collision block 8223 and the inner envelope 8225 is the secondary working stroke of the shock-absorbing colloid 822.

[0064] The contact area between the main anti-collision block 8222 and the inner envelope 8225 is greater than or equal to the contact area between the secondary anti-collision block 8223 and the inner envelope 8225, thereby enabling the main anti-collision block 8222 to withstand a greater impact force than the secondary anti-collision block 8223. The main anti-collision block 8222 is used to resist the torsional moment applied by the motor assembly 1 to the rear suspension 8 of the drive motor, and the secondary anti-collision block 8223 is used to resist the X-direction impact force applied by the motor assembly 1 to the rear suspension 8 of the drive motor.

[0065] See also Figure 8 As shown, the gap between the main anti-collision block 8222 located at the top and the inner envelope 8225 is C, and the gap between the main anti-collision block 8222 located at the bottom and the inner envelope 8225 is D, the purpose of which is to limit the deformation displacement of the four shock-absorbing main ribs 8221 when the motor assembly 1 is under the maximum torque condition, so as to meet the reliability and durability requirements of the suspension cushion 82. The gap between the auxiliary anti-collision block 8223 and the inner envelope 8225 is E, the purpose of which is to limit the deformation displacement of the four shock-absorbing main ribs 8221 when the motor assembly 1 is under the maximum impact condition, so as to meet the reliability and durability requirements of the suspension cushion 82.

[0066] Among them, the gap C between the main anti-collision block 8222 located at the top and the inner envelope 8225 is greater than the gap D between the main anti-collision block 8222 located at the bottom and the inner envelope 8225. When the motor assembly 1 is installed on the drive motor rear suspension 8, the drive motor rear suspension 8 is not only used to buffer the torsional moment and impact force of the motor assembly 1, but also needs to bear the gravity of the motor assembly 1. Under the action of the gravity of the motor assembly 1 carried by the drive motor rear suspension 8, the gap C between the main anti-collision block 8222 located at the top and the inner envelope 8225 will be reduced to be equal to the gap D between the main anti-collision block 8222 located at the bottom and the inner envelope 8225.

[0067] Two anti-collision bosses 8211 are arranged symmetrically on the inner wall of the inner limit tube 821. The inner limit tube 821 and the anti-collision bosses 8211 are integrally formed structures of aluminum alloy materials. The anti-collision bosses 8211 are used to radially support the main anti-collision block 8222. The anti-collision bosses 8211 are used to radially support the main anti-collision block 8222 to enhance the structural stability and anti-deformation ability of the main anti-collision block 8222.

[0068] like Fig. 9As shown, the three-way dynamic stiffness of the drive motor rear suspension 8 is 550N.m, 210N.m and 550N.m in the W3 direction, U3 direction and V3 direction respectively; when arranging the drive motor rear suspension 8, the W3 direction is coincident with the line connecting the output shaft point O of the motor assembly 1 and the center point of the suspension cushion 82, the V3 direction is perpendicular to the line, and the U3 direction (not shown in the figure) is the same as the Y direction of the whole vehicle; in this way, the maximum stiffness direction of the suspension cushion 82 can be consistent with the direction of the maximum torque M of the motor assembly 1, so that the maximum stiffness performance of the drive motor rear suspension 8 can be brought into play.

[0069] In some optional implementations: See Figures 5 to 7 As shown, the embodiment of the present application provides a rear suspension of a driving motor, wherein the inner limit frame 823 of the rear suspension of the driving motor 8 is made of nylon, and the inner sleeve 824 is an aluminum alloy tube structure, which can reduce its own weight. The inner sleeve 824 is connected to the inner limit frame 823 by injection molding, and the outer wall of the inner sleeve 824 is provided with a plurality of tooth grooves 8242 embedded in the inner limit frame 823, and the tooth grooves 8242 can increase the surface area of ​​the outer ring of the inner sleeve 824, thereby increasing the contact area between the inner sleeve 824 and the inner limit frame 823, thereby increasing the bonding force between the inner sleeve 824 and the inner limit frame 823, and improving the durability and reliability of the suspension cushion 82.

[0070] A positioning hole 8231 is provided at one end of the inner limit frame 823, and an inner hole 8241 is provided in the inner sleeve 824 and passes through both ends of the inner sleeve 824, and the axes of the positioning hole 8231 and the inner hole 8241 are parallel. The positioning hole 8231 provided on the inner limit frame 823 and the inner hole 8241 of the inner sleeve 824 play a positioning role together when the shock-absorbing colloid 822 is vulcanized.

[0071] See also Fig.10 As shown, the second aspect of the embodiment of the present application provides a suspension system, including:

[0072] The vehicle frame includes 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. The motor assembly 1 is located at the front side of the sub-frame assembly 12 and between the left longitudinal beam assembly 10 and the right longitudinal beam assembly 11.

[0073] A suspension unit, the suspension unit includes a left bracket 2 connected to a left longitudinal beam assembly 10, a right bracket 5 connected to a right longitudinal beam assembly 11; a left elastic bracket assembly 3 connected to the left bracket 2, a right bracket 5 connected to the right longitudinal beam assembly 11, and a right elastic bracket assembly 6 connected to the right bracket 5; a left bracket 4 connected between the left elastic bracket assembly 3 and the motor assembly 1, 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 subframe assembly 12, and a drive motor rear suspension 8 described in any of the above embodiments connected between the rear suspension bracket 9 and the motor assembly 1.

[0074] The left bracket 2 of the embodiment of the present application is mounted on the left longitudinal beam assembly 10 by bolts; the left elastic bracket assembly 3 is mounted on the left bracket 2 by bolts and nuts; the left bracket 4 is mounted on the motor assembly 1 by bolts and connected to the left elastic bracket assembly 3. The right bracket 5 is mounted on the right longitudinal beam assembly 11 by bolts; the right elastic bracket assembly 6 is mounted on the right bracket 5 by bolts and nuts; the right bracket 7 is mounted on the motor assembly 1 by bolts and connected to the right elastic bracket assembly 6; the drive motor rear suspension 8 is mounted on the motor assembly 1 by bolts and connected to the rear suspension bracket 9.

[0075] The left bracket 4, the right bracket 7, and the rear suspension 8 of the driving motor jointly support the motor assembly 1; the left bracket 2, the right bracket 5, and the rear suspension bracket 9 jointly connect the motor assembly 1 to the subframe assembly 12; the left elastic bracket assembly 3, the right elastic bracket assembly 6, and the rear suspension 8 of the driving motor play the role of connection, shock absorption, and vibration isolation. As mentioned above, the rear suspension 8 of the driving motor plays the role of supporting the motor assembly 1, and also plays the role of connection, shock absorption, and vibration isolation. That is, the rear suspension 8 of the driving motor connects the motor assembly 1 and the rear suspension bracket 9; attenuates and isolates the vibration and torsional force transmitted from the motor assembly 1 to the rear suspension bracket 9.

[0076] 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.

[0077] 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.

[0078] 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 drive motor rear suspension, characterized in that: include: A suspension frame (81), the suspension frame (81) comprising an outer sleeve (813) and a connecting steel plate (812) fixedly connected to the outer sleeve (813), the connecting steel plate (812) being provided with an arc groove matched with the outer wall surface of the outer sleeve (813), and a metal pipe (811) for connecting to the motor assembly (1) being fixed at one end of the connecting steel plate (812) away from the arc groove; A suspension cushion (82) is press-fitted into the outer sleeve (813) and comprises an inner limit tube (821), a shock-absorbing colloid (822) located in the inner limit tube (821), an inner limit frame (823) connected to the shock-absorbing colloid (822), and an inner sleeve (824) with both ends exposed outside the inner limit frame (823) embedded in the inner limit frame (823).

2. A drive motor rear suspension as claimed in claim 1, characterized in that: The connecting steel plate (812) is vertically connected to the outer wall of the outer sleeve (813) and is located in the middle of the outer sleeve (813). There are multiple metal tubes (811), and the multiple metal tubes (811) are all connected to the connecting steel plate (812) and are arranged at intervals from each other. The multiple metal tubes (811) are welded to the connecting steel plate (812) or are integrally cast into a structure.

3. A drive motor rear suspension as claimed in claim 2, characterized in that: The wall thickness of the metal tube (811) and the wall thickness of the connecting steel plate (812) are both 6-10 mm. The outer sleeve (813) is formed by processing a seamless steel tube. The wall thickness of the outer sleeve (813) is 4-6 mm. Multiple metal tubes (811) are located on the same arc line on the connecting steel plate (812). The axes of the multiple metal tubes (811) are parallel to the axis of the outer sleeve (813), and the arc angle of the arc groove is greater than or equal to 180°.

4. The rear suspension of a driving motor according to claim 1, characterized in that: The shock-absorbing colloid (822) comprises an outer envelope (8224) in an annular structure and an inner envelope (8225) in an annular structure, wherein the inner envelope (8225) is located inside the outer envelope (8224) and is coaxially arranged with each other, and a plurality of shock-absorbing main ribs (8221) arranged at circumferential intervals are connected between the outer envelope (8224) and the inner envelope (8225); The outer envelope (8224) is connected to the plurality of shock-absorbing main ribs (8221) as a whole and is vulcanized into one with the inner limiting tube (821), and the inner envelope (8225) is wrapped around the outer periphery of the inner limiting skeleton (823) and is connected to the plurality of shock-absorbing main ribs (8221) as a whole.

5. A drive motor rear suspension as claimed in claim 4, characterized in that: The shock-absorbing colloid (822) further comprises two main anti-collision blocks (8222) respectively connected to the outer envelope (8224) and arranged in a central symmetrical manner, wherein the main anti-collision blocks (8222) are located in the gap between two adjacent shock-absorbing main ribs (8221); The shock-absorbing colloid (822) further comprises two auxiliary anti-collision blocks (8223) respectively connected to the outer envelope (8224) and arranged in a centrally symmetrical manner, wherein the auxiliary anti-collision blocks (8223) are located in the gap between two adjacent shock-absorbing main ribs (8221).

6. A drive motor rear suspension as claimed in claim 5, characterized in that: The side wall of the inner limit frame (823) is provided with two symmetrically arranged first protrusions (8232) and two symmetrically arranged second protrusions (8233), the end area of ​​the first protrusion (8232) is greater than or equal to the end area of ​​the second protrusion (8233), and the protruding height of the second protrusion (8233) is greater than or equal to the protruding height of the first protrusion (8232); The first protrusion (8232) is located in the gap between two adjacent shock-absorbing main ribs (8221) and is opposite to the main anti-collision block (8222), and the second protrusion (8233) is located in the gap between two adjacent shock-absorbing main ribs (8221) and is opposite to the auxiliary anti-collision block (8223).

7. A drive motor rear suspension as claimed in claim 4 or 5, characterized in that: The gap between the main anti-collision block (8222) and the inner envelope (8225) is greater than or equal to the gap between the secondary anti-collision block (8223) and the inner envelope (8225), and the contact area between the main anti-collision block (8222) and the inner envelope (8225) is greater than or equal to the contact area between the secondary anti-collision block (8223) and the inner envelope (8225).

8. A drive motor rear suspension as claimed in claim 4 or 5, characterized in that: The inner wall of the inner limit tube (821) is provided with two anti-collision bosses (8211) which are arranged symmetrically with respect to the center. The inner limit tube (821) and the anti-collision bosses (8211) are integrally formed structures made of aluminum alloy. The anti-collision bosses (8211) are used to radially support the main anti-collision block (8222).

9. A drive motor rear suspension as claimed in claim 1 or 4, characterized in that: The inner limit frame (823) is made of nylon, the inner sleeve (824) is an aluminum alloy tube structure, the inner sleeve (824) and the inner limit frame (823) are connected as one by injection molding, and the outer wall of the inner sleeve (824) is provided with a plurality of tooth grooves (8242) embedded in the inner limit frame (823); A positioning hole (8231) is provided at one end of the inner limiting frame (823), and an inner hole (8241) penetrating through both ends of the inner sleeve (824) is provided in the inner sleeve (824), and the axes of the positioning hole (8231) and the inner hole (8241) are parallel.

10. 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) connected to the left longitudinal beam assembly (10), and a right bracket (5) connected to the right longitudinal beam assembly (11); A left elastic bracket assembly (3) connected to the left bracket (2), and a right elastic bracket assembly (6) connected to the right bracket (5); A left bracket (4) connected between the left elastic bracket assembly (3) and the motor assembly (1), and a right bracket (7) connected between the right elastic bracket assembly (6) and the motor assembly (1); A rear suspension bracket (9) connected to a subframe assembly (12), and a drive motor rear suspension (8) as claimed in any one of claims 1 to 9 connected between the rear suspension bracket (9) and the motor assembly (1).

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