CN110978976A - Suspension system of electric automobile - Google Patents
Suspension system of electric automobile Download PDFInfo
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- CN110978976A CN110978976A CN201911353218.4A CN201911353218A CN110978976A CN 110978976 A CN110978976 A CN 110978976A CN 201911353218 A CN201911353218 A CN 201911353218A CN 110978976 A CN110978976 A CN 110978976A
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- cushion assembly
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- left suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
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- Mechanical Engineering (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention relates to the field of new energy automobiles, in particular to an electric automobile suspension system, which is characterized in that a left suspension framework is connected with a front auxiliary frame, and a left suspension bracket is connected with a speed reducer through a left suspension bracket; the right suspension framework is connected with the front auxiliary frame, and the right suspension bracket is connected with the motor shell; the rear suspension cushion assembly is connected with the shell of the speed reducer and is connected with the front auxiliary frame through a rear suspension bracket; the speed reducer and the motor form a power assembly; rubber bushings are arranged at the joint of the left suspension framework and the left suspension bracket arm and the joint of the right suspension framework and the right suspension bracket arm; the rear suspension cushion assembly is provided with a rubber bushing and is connected with the rear suspension bracket through the rubber bushing; the center points of the three rubber bushings form a triangle, and the centroid of the triangle is coincided with the centroid of the power assembly. The centroid of a triangle formed by the central points of the three rubber bushings is coincident with the centroid of the power assembly, so that the power assembly is effectively limited to rotate under the working condition of the limit torque, and the torsion resistance effect is good.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to an electric automobile suspension system.
Background
The pistons in the cylinder of the power assembly of the engine of the traditional fuel vehicle reciprocate to drive the crankshaft to rotate to output power outwards, so that the self vibration excitation of the power assembly of the engine is large, and the suspension system plays an important role in vibration isolation and support as a structure for bearing the power assembly. The front-wheel drive engine power assembly of the traditional fuel vehicle is generally arranged based on a torque Axis (TRA), and a suspension system carries the engine power assembly in a three-point or four-point arrangement mode according to the torque Axis (TRA), as shown in fig. 1 and 2, wherein the torque Axis (TRA) is an inherent attribute Axis of the power assembly and penetrates through the center of mass of the power assembly, and a position parameter can be calculated according to the weight, the center of mass and a rotational inertia parameter of the power assembly.
The three-point suspension torque shaft (TRA) arrangement of a traditional engine is characterized in that as shown in fig. 1, a Left suspension cushion assembly (LM, Left Mount) is connected with a transmission end, a Right suspension cushion assembly (RM, Right Mount) is connected with an engine end, a rear suspension cushion assembly (BM, Behind Mount) is connected with an engine power assembly through a transition support, and the rear suspension cushion assembly plays a role in limiting the rotation of the engine power assembly; the arrangement requires that the connecting line of the left suspension cushion assembly (LM) and the right suspension cushion assembly (RM) is consistent with the torque axis (TRA) as much as possible, and the included angle is less than or equal to 5 degrees. Similarly, the four-point suspension torque axis (TRA) of the traditional fuel vehicle is arranged as shown in fig. 2, and the connecting line of the left suspension cushion assembly and the right suspension cushion assembly is required to be consistent with the torque axis (TRA) as much as possible, and the included angle is less than or equal to 5 degrees; the Front suspension cushion assembly (FM) and the rear suspension cushion assembly (BM) limit the rotation of the engine power assembly.
For a front-drive electric automobile, a motor and a speed reducer form a power assembly, vibration excitation of the motor is much smaller than that of a traditional engine, but torque characteristic change of the motor is violent than that of the traditional engine, the torque of the motor is suddenly changed to be the maximum torque near zero rotating speed, and the motor torque suddenly changes under the working conditions of sudden acceleration and sudden deceleration, so that the power assembly is interfered with peripheral parts due to overlarge angles in three translation displacements and three rotation directions in space. Therefore, the three-point suspension torque shaft arrangement of the traditional generator and the four-point suspension torque shaft arrangement of the traditional fuel vehicle cannot be applied to the front-engine-driven electric vehicle.
Disclosure of Invention
The invention aims to solve the problem that the three-point suspension torque shaft arrangement of a traditional generator and the four-point suspension torque shaft arrangement of a traditional fuel vehicle cannot be suitable for a front-mounted forerunner electric vehicle, and provides an electric vehicle suspension system.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an electric automobile suspension system comprises a left suspension cushion assembly, a left suspension bracket, a right suspension cushion assembly, a rear suspension cushion assembly and a rear suspension bracket; the left suspension cushion assembly comprises a left suspension framework and a left suspension bracket arm which are connected with each other, the left suspension framework is connected with the front auxiliary frame, and the left suspension bracket arm is connected with the speed reducer shell through a left suspension bracket; the right suspension cushion assembly comprises a right suspension framework and a right suspension bracket arm which are connected with each other, the right suspension framework is connected with the front auxiliary frame, and the right suspension bracket arm is connected with the motor shell; the rear suspension cushion assembly is connected with the shell of the speed reducer and is connected with the front auxiliary frame through a rear suspension bracket; the speed reducer and the motor form a power assembly; the left suspension cushion assembly, the right suspension cushion assembly and the rear suspension cushion assembly are all provided with rubber bushings; the rubber bushing of the left suspension cushion assembly is arranged at the joint of the left suspension framework and the left suspension bracket arm, the rubber bushing of the right suspension cushion assembly is arranged at the joint of the right suspension framework and the right suspension bracket arm, and the rubber bushing of the rear suspension cushion assembly is arranged at the joint of the rear suspension cushion assembly and the rear suspension bracket; the center points of the three rubber bushings form a triangle, and the centroid of the triangle is coincided with the centroid of the power assembly.
Furthermore, the bottom of the left suspension framework is connected with the front auxiliary frame, and the top of the left suspension framework is provided with a first groove; a first outer pipe and an inner pipe are arranged in the first groove; a baffle is welded at one end of the inner pipe, and the rubber bushing and the first outer pipe are sleeved outside the inner pipe in sequence; the first outer pipe is in interference fit with the first groove.
Furthermore, one end of the left suspension bracket arm inserted into the inner tube is of a hollow structure in interference fit with the inner tube, and the other end of the left suspension bracket arm is provided with three first mounting through holes connected with the left suspension bracket; the casing of left side suspension trailing arm is hollow out construction, is equipped with several strengthening ribs in the hollow out construction, and three first installation through-hole all is located the crosspoint of strengthening rib.
Furthermore, one end of the left suspension bracket is provided with three bosses which correspond to the first mounting through holes one by one, and threaded holes are formed in the bosses; the other end of the left suspension bracket is provided with three positioning points which are in one-to-one correspondence with threaded holes on the speed reducer shell; the left suspension support is provided with a plurality of reinforcing ribs, and the bosses and the positioning points are located at the cross points of the reinforcing ribs.
Further, the structure of the right suspension framework is the same as that of the left suspension framework; the bottom and the preceding sub vehicle frame of right suspension skeleton are connected, and the one end of right suspension trailing arm inserts corresponding inner tube and with this inner tube interference fit, and the other end is equipped with the three second installation through-hole of being connected with motor casing.
Furthermore, the insertion end of the right suspension bracket arm is of a hollow structure; the casing of right side suspension trailing arm is hollow out construction, is equipped with several strengthening ribs in the hollow out construction, and three second installation through-hole all is located the crosspoint of strengthening rib.
Furthermore, the rear suspension cushion assembly comprises a rear suspension framework, the rear suspension framework is provided with a first opening, a second outer pipe and a core pipe are arranged in the first opening, and the rubber bushing and the second outer pipe are sequentially sleeved outside the core pipe; the second outer tube is in interference fit with the first opening.
Furthermore, the rear suspension bracket comprises a bottom plate, and the bottom plate is provided with a plurality of third mounting through holes connected with the front auxiliary frame; the bottom plate is also provided with a first vertical plate and a second vertical plate which are parallel to each other, the first vertical plate and the second vertical plate are both provided with fourth mounting through holes, and the core pipe is positioned between the two fourth mounting through holes; the bolt penetrates through the two fourth mounting through holes and the core pipe.
Furthermore, weight reduction grooves are formed in the outer surfaces of the two sides of the rear suspension framework shell; the rear suspension framework is also provided with a second opening connected with the reducer shell.
Furthermore, the left suspension framework, the left suspension bracket arm, the left suspension support, the right suspension framework, the right suspension bracket arm, the rear suspension support and the rear suspension framework are all made of A380 aluminum alloy.
Compared with the prior art, the invention has the beneficial effects that:
(1) the left suspension cushion assembly, the right suspension cushion assembly and the rear suspension cushion assembly are respectively provided with the rubber bushings, the centroid of a triangle formed by the central points of the three rubber bushings is superposed with the centroid of the power assembly, namely the centroid formed by the central points of the three rubber bushings (13) forms centroid arrangement, so that the power assembly is effectively limited to rotate under the working condition of ultimate torque, and the torsion resistant effect is good;
(2) the three rubber bushings attenuate vibration excitation generated by the power assembly to play a role in vibration isolation, and three translational displacements and three rotation direction angles generated by the power assembly on various bumpy roads and under emergency starting and braking conditions are limited within a specified range through flexible connection formed by the rubber bushings, so that collision with peripheral parts is prevented, and the NVH performance of the whole vehicle is improved;
(3) the left suspension framework and the right suspension framework have the same structure and can be shared, so that the development cost of the die is reduced;
(4) the left suspension bracket arm, the left suspension bracket and the right suspension bracket arm are designed in a light weight manner, and the weight can be reduced while the bearing performance is ensured by optimizing the arrangement mode of the reinforcing ribs;
(5) the left suspension bracket effectively converts the connection of the mounting points distributed in the Z direction on the speed reducer into the connection distributed in the X direction of the left suspension cushion assembly;
(6) the rear suspension bracket is directly arranged on the front auxiliary frame, and is convenient to assemble with the rear suspension cushion assembly, so that the assembly efficiency is improved;
(7) and the left suspension framework, the left suspension bracket arm, the left suspension support, the right suspension framework, the right suspension bracket arm, the rear suspension support and the rear suspension framework are made of A380 aluminum alloy materials, so that the weight of parts is reduced, and the economy of the whole vehicle is improved.
Drawings
FIG. 1 is a three point mount torque axis (TRA) arrangement of a conventional engine;
FIG. 2 is a four-point suspended torque axle (TRA) arrangement of a conventional fuel vehicle;
FIG. 3 is a diagram illustrating a connection structure of a suspension system, a reducer and a motor of an electric vehicle according to an embodiment of the present invention;
FIG. 4 is a structural diagram of a suspension system of an electric vehicle according to an embodiment;
FIG. 5 is an overall view of the left suspension cushion assembly;
FIG. 6 is an overall view of the right suspension cushion assembly;
FIG. 7 is a schematic view of the connection of the rear suspension cushion assembly to the rear suspension bracket;
FIG. 8 is an exploded view of the left suspension armature;
FIG. 9 is a front view of the left suspension bracket;
FIG. 10 is a rear view of the left suspension bracket;
FIG. 11 is a left suspension bracket configuration view;
FIG. 12 is a front view of the right suspension bracket;
FIG. 13 is a rear view of the right suspension bracket;
FIG. 14 is an exploded view of the rear suspension backbone;
fig. 15 is a view showing the structure of the rear suspension bracket.
In the figure, 1 a left suspension cushion assembly, 2 a left suspension support, 3 a speed reducer, 4 a motor, 5 a front auxiliary frame, 6 a right suspension cushion assembly, 7 a rear suspension cushion assembly, 8 a rear suspension support, 9 a left suspension framework, 10 a left suspension bracket arm, 11 a right suspension framework, 12 a right suspension bracket arm, 13 a rubber bushing, 14 a first groove, 15 a first outer pipe, 16 an inner pipe, 17 a baffle plate, 18 a first mounting through hole, 19 a boss, 20 a positioning point, 21 a second mounting through hole, 22 a first opening, 23 a second outer pipe, 24 a core pipe, 25 a weight reduction groove, 26 a second opening, 27 a bottom plate, 28 a third mounting through hole, 29 a first vertical plate, 30 a second vertical plate and 31 a fourth mounting through hole.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
As shown in fig. 3 to 15, the suspension system of the electric vehicle of the present embodiment includes a left suspension pad assembly 1, a left suspension bracket 2, a right suspension pad assembly 6, a rear suspension pad assembly 7, and a rear suspension bracket 8. The left suspension cushion assembly 1 comprises a left suspension framework 9 and a left suspension supporting arm 10 which are connected with each other, the left suspension framework 9 is connected with the front auxiliary frame 5, and the left suspension supporting arm 10 is connected with the shell of the speed reducer 3 through the left suspension support 2. The right suspension cushion assembly 6 comprises a right suspension framework 11 and a right suspension supporting arm 12 which are connected with each other, the right suspension framework 11 is connected with the front auxiliary frame 5, and the right suspension supporting arm 12 is connected with the shell of the motor 4. The rear suspension cushion assembly 7 is connected with the shell of the speed reducer 3 and is connected with the front auxiliary frame 5 through a rear suspension bracket 8. The speed reducer 3 and the motor 4 form a power assembly. For promoting whole car NVH performance, left suspension cushion assembly 1, right suspension cushion assembly 6 and back suspension cushion assembly 7 all are equipped with rubber bush 13, all constitute the flexible coupling mode through rubber bush 13. The three rubber bushings 13 can attenuate the vibration excitation generated by the power assembly to play a role of vibration isolation, and the three translational displacements and the three rotation direction angles generated by the power assembly on various bumpy roads and under the working conditions of emergency starting and braking are limited within a specified range through the flexible connection formed by the rubber bushings 13 to prevent collision with peripheral parts.
The rubber bushing 13 of the left suspension cushion assembly 1 is arranged at the joint of the left suspension framework 9 and the left suspension support arm 10, and the rubber bushing 13 of the right suspension cushion assembly 6 is arranged at the joint of the right suspension framework 11 and the right suspension support arm 12. The rubber bushing 13 of the rear suspension cushion assembly 7 is arranged at the joint of the rear suspension cushion assembly 7 and the rear suspension bracket 8. The central points of the three rubber bushings 13 form a triangle, and the centroid of the triangle coincides with the centroid of the power assembly, that is, the centroid formed by the central points of the three rubber bushings 13 forms a centroid layout. Compared with the traditional engine torque shaft (TRA) arrangement mode and the traditional fuel vehicle torque shaft arrangement mode, the suspension system of the embodiment has the advantages that the distance between the central point of the rubber bushing 13 of the left suspension cushion assembly 1, the central point of the rubber bushing 13 of the right suspension cushion assembly 6 and the center of mass of the power assembly in the X direction of the whole vehicle is large, the rotation of the power assembly under the working condition of the limit torque can be effectively limited, and the torsion resistant effect is good.
The left suspension frame 9 is claw-shaped as a whole. The bottom of the left suspension framework 9 is connected with the front auxiliary frame 5 and is provided with a mounting through hole connected with the front auxiliary frame 5. The top of the left suspension framework 9 is provided with a first groove 14, and a first outer tube 15 and an inner tube 16 are arranged in the first groove 14. A baffle 17 is welded at one end of the inner pipe 16, and the rubber bushing 13 and the first outer pipe 15 are sleeved outside the inner pipe 16 in sequence. After the inner pipe 16 and the baffle 17 are welded together, the inner pipe is fixed on the hollow inner surface of the rubber bushing 13 through a vulcanization process, and the rubber bushing 13 is fixed on the hollow inner surface of the first outer pipe 15 through a vulcanization process. The first outer tube 15 is in interference fit with the first groove 14. The final inner tube 16 is flexibly connected with the left suspension bracket arm 10. One end of the left suspension bracket 10 inserted into the inner tube 16 is a hollow structure in interference fit with the inner tube 16, and the hollow structure is a polygonal hollow tube. The other end of the left suspension bracket arm 10 is provided with three first mounting through holes 18 connected with the left suspension bracket 2. The shell of the left suspension bracket arm 10 is of a hollow structure, the edge of the other end of the left suspension bracket arm 10 extending from the outer wall of the hollow pipe forms the shell of the left suspension bracket arm 10, the interior of the shell is of the hollow structure, and the first mounting through hole 18 is formed in the shell of the left suspension bracket arm 10. A plurality of reinforcing ribs are arranged in the shell of the left suspension bracket arm 10, and the three first mounting through holes 18 are all located at the cross points of the reinforcing ribs. In the embodiment, the left suspension bracket arm 10 is subjected to topology optimization lightweight design, the content of the topology optimization lightweight design is that reinforcing ribs are optimally arranged on the left suspension bracket arm 10, and the reinforcing ribs are arranged in the direction to connect the three first mounting through holes 18 so as to enhance the strength in the X direction and the Z direction. The content of the topological optimization lightweight design also comprises removing materials for the region with small structural stress on the left suspension bracket arm 10, specifically, designing one end of the left suspension bracket arm 10 into a hollow pipe and designing the shell of the left suspension bracket arm 10 into a hollow structure, so that the left suspension bracket arm 10 integrally reduces the weight by 10%, and the X-direction and Z-direction reinforcing ribs can effectively bear the X-direction and Z-direction loads of the power assembly, thereby meeting the strength requirement and reducing the cost. The content of the topological optimization lightweight design also comprises that the left suspension bracket arm 10 is made of lightweight A380 aluminum alloy material. The left suspension bracket 10 is manufactured and molded by a high-pressure casting process, the production efficiency of the process is high, the requirement for mass production can be met, the weight of parts is small, and the cost is reduced.
The left suspension cushion assembly 1 is connected to the shell of the speed reducer 3 through the left suspension support 2 in a transition mode, the modal frequency of the left suspension cushion assembly 1 is improved, and coupling resonance caused by low modal frequency and random excitation of a road surface is avoided. If the left suspension cushion assembly 1 is directly connected with the shell of the speed reducer 3, the Y-direction span of the left suspension cushion assembly is large, a long-sized transition support structure appears, and the inherent property of the long-sized support structure with low modal frequency can resonate with the road surface low-frequency random excitation to influence the NVH effect. One end of the left suspension bracket 2 is provided with three bosses 19 which are in one-to-one correspondence with the first mounting through holes 18, threaded holes are formed in the bosses 19, and the three threaded holes are distributed in the X direction of the whole vehicle relatively. The left suspension bracket 2 is connected with the left suspension bracket arm 10 through threaded holes in three bosses 19, and bolts sequentially pass through the first mounting through holes 18 and the threaded holes in the bosses 19. The other end of the left suspension bracket 2 is provided with three positioning points 20 which are in one-to-one correspondence with the threaded holes on the shell of the speed reducer 3. The threaded holes on the shell of the speed reducer 3 are distributed relative to the Z direction. The left suspension bracket 2 is provided with a plurality of reinforcing ribs, and the boss 19 and the positioning points 20 are located at the cross points of the reinforcing ribs.
In order to consider light weight, the topological optimization light weight design is carried out on the left suspension bracket 2 in the embodiment, the content of the topological optimization light weight design is that reinforcing ribs are optimally arranged on the left suspension bracket 2, and the reinforcing ribs are connected with the distribution walking direction of each mounting hole to strengthen the strength in the X direction and the Z direction. The left suspension bracket 2 effectively converts the connection of the mounting points distributed in the Z direction on the speed reducer 3 into the connection distributed in the 1X direction of the left suspension cushion assembly. The content of the topological optimization lightweight design also comprises that the left suspension bracket 2 is made of lightweight A380 aluminum alloy material, and the overall weight is reduced by about 15%.
The right suspension cushion assembly 6 is the lightweight design of integrated form, compares the left side according to spatial arrangement and arranges the right suspension support of having cancelled corresponding with left suspension support 2, and the right side is through right suspension cushion assembly 6 lug connection to motor 4 on, reduces part quantity, reduce cost. The structure of the right suspension framework 11 in the right suspension cushion assembly 6 is the same as that of the left suspension framework 9, and the right suspension framework can be shared, so that the development cost of the die is reduced by 20%. The inner pipe 16 of the right suspension framework 11 is flexibly connected with the right suspension bracket arm 12. The bottom of the right suspension framework 11 is connected with the front auxiliary frame 5, one end of the right suspension bracket 12 is inserted into the corresponding inner tube 16 and is in interference fit with the inner tube 16, and the other end of the right suspension bracket is provided with three second mounting through holes 21 connected with the shell of the motor 4. The end of the right suspension bracket 12 inserted into the inner tube 16 is a hollow structure, the hollow structure is a polygonal hollow tube, the edge of the other end of the right suspension bracket 12 extends from the outer wall of the hollow tube to form a right suspension bracket 12 shell with a hollow structure inside, and the second mounting through hole 21 is formed in the right suspension bracket 12 shell. A plurality of reinforcing ribs are arranged in the shell of the right suspension bracket 12, and the three second mounting through holes 21 are all located at the cross points of the reinforcing ribs.
In the embodiment, the right suspension bracket arm 12 is subjected to topology optimization lightweight design, the content of the topology optimization lightweight design is that reinforcing ribs are optimally arranged on the right suspension bracket arm 12, and the reinforcing ribs are arranged in the direction to be connected with the three second mounting through holes 21 so as to enhance the strength in the X direction and the strength in the Z direction. The content of the topological optimization lightweight design also comprises material removal for an area with low structural stress on the right suspension bracket arm 12, specifically, one end of the right suspension bracket arm 12 is designed into a hollow pipe, and the shell of the right suspension bracket arm 12 is designed into a hollow structure, so that the weight of the whole right suspension bracket arm 12 is reduced by 10%, and the X-direction and Z-direction reinforcing ribs can effectively bear the X-direction and Z-direction loads of the power assembly, thereby meeting the strength requirement and reducing the cost. The content of the topological optimization lightweight design also comprises that the right suspension bracket arm 12 is made of lightweight A380 aluminum alloy material and is manufactured and molded into a high-pressure casting process, the process has high production efficiency, can meet the requirement of mass production, and has light part weight and reduced cost.
Rear suspension cushion assembly 7 includes rear suspension skeleton, and rear suspension skeleton is equipped with first trompil 22, is equipped with second outer tube 23 and core pipe 24 in the first trompil 22, and core pipe 24 overlaps in proper order outward and establishes rubber bush 13 the second outer tube 23. The core tube 24 is vulcanized on the hollow inner surface of the rubber bushing 13, the rubber bushing 13 is vulcanized on the hollow inner surface of the second outer tube 23, and the second outer tube 23 is in interference fit with the first opening 22. Finally, the core tube 24 is flexibly connected with the rear suspension bracket 8. In the embodiment, the rear suspension framework is designed in a topology optimization lightweight manner, and the specific content of the topology optimization lightweight design is that the outer surfaces of two sides of the shell of the rear suspension framework are respectively provided with the weight reduction grooves 25. The rear suspension skeleton is also provided with a second opening 26 connected with the shell of the speed reducer 3, the rear suspension cushion assembly 7 is connected with the shell of the speed reducer 3 through the three second openings 26, the installation is convenient and quick, the traditional installation mode that the rear suspension cushion assembly 7 is inserted into the front auxiliary frame 5 is high in assembly efficiency, the assembly time is saved, and the assembly efficiency is improved by the aid of the rear suspension cushion assembly 7.
The rear suspension bracket 8 comprises a bottom plate 27, the bottom plate 27 is provided with a plurality of third mounting through holes 28 connected with the front subframe 5, and the rear suspension bracket 8 is directly mounted on the front subframe 5 through the three third mounting through holes 28. The bottom plate 27 is further provided with a first vertical plate 29 and a second vertical plate 30 which are parallel to each other, the first vertical plate 29 and the second vertical plate 30 are both provided with fourth installation through holes 31, and the core tube 24 is located between the two fourth installation through holes 31. The bolts penetrate through the two fourth mounting through holes 31 and the core pipe 24 to connect the rear suspension bracket 8 and the rear suspension cushion assembly 7. The rear suspension support 8 and the rear suspension framework are made of light A380 aluminum alloy materials, and the overall weight is reduced by 10%.
The suspension system of the electric vehicle adopts a three-point centroid arrangement mode, namely a triangular centroid formed by the central points of the rubber bushings 13 of the left suspension cushion assembly 1, the right suspension cushion assembly 6 and the rear suspension cushion assembly 7 is superposed with the centroid of the power assembly, the suspension system can better control the rotation of the power assembly under the working conditions of large torque sudden change and the like, and the torsion resistance effect is good; the left suspension framework 9 of the left suspension cushion assembly 1 and the right suspension framework 11 of the right suspension cushion assembly 6 can be shared, so that the development cost of the die is reduced by 20%; the left and right suspension cushion assemblies 6 are designed in a light weight mode, and the arrangement mode of the reinforcing ribs is optimized, so that the weight can be reduced while the bearing performance is ensured, and the part cost is reduced; the structure of the left suspension bracket 2 effectively converts the connection of mounting points distributed in the Z direction on the speed reducer 3 into the connection distributed in the X direction of the left suspension cushion assembly 1, and the structure is designed in a light weight manner; the rear suspension support 8 is directly arranged on the front auxiliary frame 5, is convenient to assemble with the rear suspension cushion assembly 7, improves the assembly efficiency, and reduces the weight of the rear suspension framework and the rear suspension support 8 by a light weight design, thereby reducing the cost of the whole vehicle.
While the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that variations may be made in the embodiments without departing from the spirit of the invention, and such variations are to be considered within the scope of the invention.
Claims (10)
1. An electric vehicle suspension system characterized by:
comprises a left suspension cushion assembly (1), a left suspension bracket (2), a right suspension cushion assembly (6), a rear suspension cushion assembly (7) and a rear suspension bracket (8);
the left suspension cushion assembly (1) comprises a left suspension framework (9) and a left suspension supporting arm (10) which are connected with each other, the left suspension framework (9) is connected with the front auxiliary frame (5), and the left suspension supporting arm (10) is connected with the shell of the speed reducer (3) through a left suspension bracket (2); the right suspension cushion assembly (6) comprises a right suspension framework (11) and a right suspension supporting arm (12) which are connected with each other, the right suspension framework (11) is connected with the front auxiliary frame (5), and the right suspension supporting arm (12) is connected with the shell of the motor (4); the rear suspension cushion assembly (7) is connected with the shell of the speed reducer (3) and is connected with the front auxiliary frame (5) through a rear suspension bracket (8);
the speed reducer (3) and the motor (4) form a power assembly; the left suspension cushion assembly (1), the right suspension cushion assembly (6) and the rear suspension cushion assembly (7) are all provided with rubber bushings (13); a rubber bushing (13) of the left suspension cushion assembly (1) is arranged at the joint of the left suspension framework (9) and the left suspension bracket arm (10), a rubber bushing (13) of the right suspension cushion assembly (6) is arranged at the joint of the right suspension framework (11) and the right suspension bracket arm (12), and a rubber bushing (13) of the rear suspension cushion assembly (7) is arranged at the joint of the rear suspension cushion assembly (7) and the rear suspension bracket (8); the central points of the three rubber bushings (13) form a triangle, and the centroid of the triangle is coincided with the centroid of the power assembly.
2. The electric vehicle suspension system of claim 1, wherein:
the bottom of the left suspension framework (9) is connected with the front auxiliary frame (5), and the top of the left suspension framework is provided with a first groove (14); a first outer pipe (15) and an inner pipe (16) are arranged in the first groove (14); a baffle plate (17) is welded at one end of the inner pipe (16), and the rubber bushing (13) and the first outer pipe (15) are sequentially sleeved outside the inner pipe (16); the first outer pipe (15) is in interference fit with the first groove (14).
3. The electric vehicle suspension system of claim 2, wherein:
one end of the left suspension bracket arm (10) inserted into the inner tube (16) is of a hollow structure in interference fit with the inner tube (16), and the other end of the left suspension bracket arm is provided with three first mounting through holes (18) connected with the left suspension bracket (2); the shell of the left suspension bracket arm (10) is of a hollow structure, a plurality of reinforcing ribs are arranged in the hollow structure, and the three first mounting through holes (18) are located at cross points of the reinforcing ribs.
4. The electric vehicle suspension system of claim 3, wherein: one end of the left suspension bracket (2) is provided with three bosses (19) which correspond to the first mounting through holes (18) one by one, and threaded holes are formed in the bosses (19); the other end of the left suspension bracket (2) is provided with three positioning points (20) which correspond to the threaded holes on the shell of the speed reducer (3) one by one; the left suspension bracket (2) is provided with a plurality of reinforcing ribs, and the bosses (19) and the positioning points (20) are all positioned at the cross points of the reinforcing ribs.
5. The electric vehicle suspension system of claim 4, wherein:
the structure of the right suspension framework (11) is the same as that of the left suspension framework (9); the bottom of the right suspension framework (11) is connected with the front auxiliary frame (5), one end of the right suspension supporting arm (12) is inserted into the corresponding inner pipe (16) and is in interference fit with the inner pipe (16), and the other end of the right suspension supporting arm is provided with three second mounting through holes (21) connected with a shell of the motor (4).
6. The electric vehicle suspension system of claim 5, wherein: one end of the right suspension bracket arm (12) inserted into the inner pipe (16) is of a hollow structure; the casing of right side suspension trailing arm (12) is hollow out construction, is equipped with several strengthening ribs in the hollow out construction, and three second installation through-hole (21) all are located the intersect of strengthening rib.
7. The electric vehicle suspension system of claim 1, wherein: the rear suspension cushion assembly (7) comprises a rear suspension framework, the rear suspension framework is provided with a first opening (22), a second outer pipe (23) and a core pipe (24) are arranged in the first opening (22), and the rubber bushing (13) and the second outer pipe (23) are sequentially sleeved outside the core pipe (24); the second outer pipe (23) is in interference fit with the first opening (22).
8. The electric vehicle suspension system of claim 7, wherein: the rear suspension bracket (8) comprises a bottom plate (27), and the bottom plate (27) is provided with a plurality of third mounting through holes (28) connected with the front auxiliary frame (5); the bottom plate (27) is further provided with a first vertical plate (29) and a second vertical plate (30) which are parallel to each other, the first vertical plate (29) and the second vertical plate (30) are both provided with fourth mounting through holes (31), and the core pipe (24) is positioned between the two fourth mounting through holes (31); the bolt penetrates through the two fourth mounting through holes (31) and the core pipe (24).
9. The electric vehicle suspension system of claim 8, wherein: the outer surfaces of two sides of the rear suspension framework shell are provided with weight reduction grooves (25); the rear suspension framework is also provided with a second opening (26) connected with the shell of the speed reducer (3).
10. The electric vehicle suspension system of claim 9, wherein: the left suspension framework (9), the left suspension bracket arm (10), the left suspension bracket (2), the right suspension framework (11), the right suspension bracket arm (12), the rear suspension bracket (8) and the rear suspension framework are all made of A380 aluminum alloy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911353218.4A CN110978976A (en) | 2019-12-25 | 2019-12-25 | Suspension system of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911353218.4A CN110978976A (en) | 2019-12-25 | 2019-12-25 | Suspension system of electric automobile |
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| CN110978976A true CN110978976A (en) | 2020-04-10 |
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| CN201911353218.4A Pending CN110978976A (en) | 2019-12-25 | 2019-12-25 | Suspension system of electric automobile |
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Application publication date: 20200410 |