CN113353176A - Double-cross-arm independent suspension device of rear-drive electric vehicle - Google Patents
Double-cross-arm independent suspension device of rear-drive electric vehicle Download PDFInfo
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- CN113353176A CN113353176A CN202110811239.7A CN202110811239A CN113353176A CN 113353176 A CN113353176 A CN 113353176A CN 202110811239 A CN202110811239 A CN 202110811239A CN 113353176 A CN113353176 A CN 113353176A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
- B62D65/02—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components
- B62D65/12—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components the sub-units or components being suspensions, brakes or wheel units
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Abstract
The invention provides a double-cross-arm independent suspension device of a rear-drive electric vehicle, which comprises two brake part assemblies, two rear wheel hub brackets, a right driving shaft, an auxiliary frame, a two-in-one driving axle, a motor controller, a left driving shaft, two suspension mechanisms and two shock absorber strut assemblies, wherein the brake part assemblies, the rear wheel hub brackets and the suspension mechanisms are arranged on one side of the auxiliary frame; the other side of the auxiliary frame is provided with another brake component assembly, another rear wheel hub bracket and another suspension mechanism, the other brake component assembly is connected with the other suspension mechanism through the other rear wheel hub bracket, and the other suspension mechanism is provided with another shock absorber strut assembly. The invention has the beneficial effects that: the invention compactly arranges a complex double-cross-arm independent suspension system, a brake system, a transmission system, an electric drive system and a motor control system, and realizes high-density integration of functions.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a double-cross-arm independent suspension device of a rear-drive electric vehicle.
Background
The whole car size of small-size electric motor car is less, and spatial arrangement is not enough to and whole car weight and cost strict control, for satisfying demands such as space, weight, cost, often adopts comparatively simple suspension mode, like preceding Macpherson's independent suspension, non-independent rear suspension (be whole axle), torsion beam half independent suspension, single armed formula independent suspension. The chassis and the whole vehicle performance of the small electric vehicle are limited to a certain extent, great challenges are provided for chassis performance design and debugging, and the problems that a user feeds back main pain points of driving the small electric vehicle to be large pitching before and after driving, strong heeling feeling, uncomfortable riding feeling and unstable control are subjectively felt are ubiquitous.
In order to provide the automobile with better chassis and whole automobile performance, the suspension system selects a multi-link independent suspension or a double-wishbone independent suspension, however, the two suspension systems need to occupy larger space for arrangement. In addition, most of electric related parts such as a motor, an electric drive speed reducer, a motor controller, a high-voltage control system, a low-voltage control system and a charging system of the electric vehicle are arranged on the chassis, so that the space of the chassis needs to be integrally planned, the design of the parts is combined, the complex suspension system, the electric drive system, the electric control system, the braking system and the like can be reasonably arranged, and besides the space arrangement, foreign object or anti-collision protection needs to be provided for the battery and the electric drive system, so that more functional requirements are required, and great challenges are also provided for the arrangement.
The suspension system, the brake system, the drive system and the electric related system have various types of parts, the number of the parts reaches hundreds, when the parts are assembled on a whole automobile line, the assembly process is complex, the assembly time is long, how to integrate the parts into modules under the whole automobile line is realized, the time and the cost on the whole automobile assembly line are reduced, and the problems that the parts need to be fully considered when the automobile is designed are also solved.
Disclosure of Invention
The invention provides a further improvement which is taken as the invention and comprises two brake component assemblies, two rear wheel hub brackets, a right driving shaft, an auxiliary frame, a two-in-one driving axle, a motor controller, a left driving shaft, two suspension mechanisms and two shock absorber strut assemblies, wherein the brake component assemblies, the rear wheel hub brackets and the suspension mechanisms are arranged on one side of the auxiliary frame; another brake component assembly, another rear wheel hub bracket and another suspension mechanism are mounted on the other side of the subframe, the other brake component assembly is connected with the other suspension mechanism through the other rear wheel hub bracket, and the other suspension mechanism is provided with another shock absorber strut assembly; two unification transaxles right side drive shaft left side drive shaft is installed sub vehicle frame inner chamber, two unification transaxles respectively with right side drive shaft left side drive shaft links to each other, motor controller installs sub vehicle frame back upper place.
As a further improvement of the invention, the suspension mechanism comprises a suspension lower control arm assembly, a suspension upper control arm assembly and a toe angle adjusting control arm assembly, and the shock absorber strut assembly is arranged on the suspension lower control arm assembly.
As a further improvement of the invention, the shock absorber strut assembly comprises a spring, a shock absorber, a buffer block and a rear shock absorber upper support assembly, the spring is mounted on the shock absorber, the buffer block and the rear shock absorber upper support assembly are mounted at one end of the shock absorber, the shock absorber is connected with a frame through the shock absorber upper support assembly, and the other end of the shock absorber is mounted on the suspension lower control arm assembly.
As a further improvement of the invention, the spring, the shock absorber, the buffer block and the rear shock absorber upper support assembly are integrated integrally.
As a further improvement of the invention, the two-in-one drive axle comprises a motor and a speed reducer, a shell of the motor and a shell of the speed reducer are connected into a whole in a matching mode through bolts, and power transmission is formed in the motor through gear engagement.
As a further improvement of the invention, the auxiliary frame is provided with a frame mounting point, and the auxiliary frame is connected to the frame through the frame mounting point.
As a further improvement of the invention, the double-wishbone independent suspension device of the rear-drive electric vehicle comprises bolts, wherein the frame mounting points comprise a first frame mounting point, a second frame mounting point, a first frame mounting point and a fourth frame mounting point, and the first frame mounting point, the second frame mounting point, the first frame mounting point and the fourth frame mounting point are respectively mounted on the periphery of the auxiliary frame through the bolts.
As a further improvement of the present invention, the suspension mechanism is integrally assembled with the subframe.
As a further improvement of the invention, the toe angle adjusting control arm assembly can perform offline adjustment on the toe angle of the independent suspension assembly.
As a further improvement of the invention, the auxiliary frame is of a # -shaped upper and lower double-layer structure.
The invention has the beneficial effects that: 1. according to the invention, through reasonable spatial arrangement and part structures, 5 systems including a complex double-cross-arm independent suspension system, a brake system, a transmission system, an electric drive system and a motor control system are compactly arranged, so that the occupied space is small, and high-density integration of functions is realized; 2. the power distribution and space requirements of the electric vehicle are met, so that the electric vehicle has better driving and driving performances; 3. the whole vehicle assembly process is simple, the operation is simple, the efficiency is high, and the reduction of production energy consumption is facilitated; 4. the invention can realize different configurations of the whole vehicle and platformization expansion of vehicle types with different sizes of vehicle systems, and the built framework has excellent ductility; 5. the double-cross-arm independent suspension device of the rear-drive electric vehicle is more flexible and excellent in performance adjustability, can adapt to the performance requirements of the whole vehicle by adjusting the hard point structure of the double-cross-arm suspension in combination with different finished vehicle mass centers, inertia centers and motion centers, is large in performance bandwidth of debugging, is easier to match and debug with the front suspension, and enables the vehicle to achieve expected performance expectations, such as the pertinence improvement on the understeer degree, the control stability and the riding comfort of the whole vehicle; 6. the rear wheel toe angle adjustable control arm assembly can complete adjustment of a rear wheel toe angle when the rear suspension assembly is separately assembled, off-line qualification rate of the adjusted parameters after the whole vehicle is assembled is high, after the rear suspension assembly is assembled to the whole vehicle, toe angle requirements of the whole vehicle can be met only by fine adjustment or no adjustment, whole vehicle debugging time is saved, and one-time passing qualification rate of four-wheel positioning parameters is improved.
Drawings
FIG. 1 is a structural diagram of a double-wishbone independent suspension device of a rear-drive electric vehicle according to the invention;
FIG. 2 is a structural view of the suspension mechanism of the present invention;
FIG. 3 is a structural view of a shock absorber strut assembly of the present invention;
FIG. 4 is a schematic view of the subframe of the present invention;
fig. 5 is an overall structure diagram of the double-wishbone independent suspension device of the rear drive electric vehicle of the present invention.
Detailed Description
As shown in fig. 1, the invention discloses a double-wishbone independent suspension device of a rear-drive electric vehicle, which comprises two brake component assemblies 1, two rear wheel hub brackets 2, a right driving shaft 3, an auxiliary frame 4, a two-in-one driving axle 5, a motor controller 6, a left driving shaft 7, two suspension mechanisms and two shock absorber strut assemblies 11, wherein the brake component assemblies 1, the rear wheel hub brackets 2 and the suspension mechanisms are installed on one side of the auxiliary frame 4, the brake component assemblies 1 are connected with the suspension mechanisms through the rear wheel hub brackets 2, and the shock absorber strut assemblies 11 are installed on the suspension mechanisms; another brake component assembly 1, another rear hub bracket 2 and another suspension mechanism are mounted on the other side of the subframe 4, the other brake component assembly 1 is connected with the other suspension mechanism through the other rear hub bracket 2, and another shock absorber strut assembly 11 is mounted on the other suspension mechanism; two unification transaxles 5 right drive axle 3 left drive axle 7 is installed 4 inner chambers of sub vehicle frame, two unification transaxles 5 respectively with right drive axle 3 left drive axle 7 links to each other, motor controller 6 installs 4 back upper portions of sub vehicle frame.
As shown in fig. 2, the suspension mechanism includes a suspension lower control arm assembly 8, a suspension lower control arm assembly 9, and a toe adjustment control arm assembly 10, and the shock absorber strut assembly 11 is mounted on the suspension lower control arm assembly 8.
As shown in fig. 3, the shock absorber strut assembly 11 includes a spring 110, a shock absorber 111, a buffer block 112, and a rear shock absorber upper support assembly 113, the spring 110 is mounted on the shock absorber 111, the buffer block 112 and the rear shock absorber upper support assembly 113 are mounted at one end of the shock absorber 111, the shock absorber 111 is connected to the vehicle frame through the shock absorber upper support assembly 113, and the other end of the shock absorber 111 is mounted on the suspension lower control arm assembly 8.
The spring 110, the shock absorber 111, the buffer block 112 and the rear shock absorber upper support assembly 113 are integrally integrated.
The two-in-one drive axle 5 comprises a motor and a speed reducer, a shell of the motor and a shell of the speed reducer are connected into a whole in a matched mode through bolts, and power transmission is formed inside the motor through gear engagement.
As shown in fig. 4, a frame mounting point is provided on the subframe 4, and the subframe 4 is connected to the frame through the frame mounting point.
The double-cross-arm independent suspension device of the rear-drive electric vehicle comprises bolts, the frame mounting points comprise a first frame mounting point 40, a second frame mounting point 41, a first frame mounting point 42 and a fourth frame mounting point 43, the first frame mounting point 40, the second frame mounting point 41, the first frame mounting point 42 and the fourth frame mounting point 43 are respectively installed on the periphery of the auxiliary frame 4 through the bolts.
The suspension mechanism is integrally assembled with the subframe 4.
The toe angle adjustment control arm assembly 10 can perform offline adjustment on the toe angle of the independent suspension assembly.
The auxiliary frame 4 is of a # -shaped upper and lower double-layer structure.
The working principle of the invention is as follows:
1. the auxiliary frame 4 is designed into a double-layer structure of a Chinese character 'jing' shape, so that the integrated frame component of the assembly is formed.
2. According to the invention, the spring 110, the shock absorber 111, the buffer block 112 and the rear shock absorber upper support assembly 113 are integrated integrally to form the rear shock absorber strut assembly 11, so that the arrangement space of the spring and the buffer block is optimized for arrangement of other parts.
3. According to the invention, the suspension lower control arm assembly 8, the suspension upper control arm assembly 9 and the toe angle adjusting control arm assembly 10 are integrally assembled to two sides of the auxiliary frame 4, so that the suspension mechanism and the auxiliary frame 4 can be integrally assembled.
4. The invention assembles the rear shock absorber strut assembly 11 on the mounting bracket of the suspension lower control arm assembly 8, and the rear shock absorber strut assembly 11 can be assembled with the suspension lower control arm assembly 8 in an integrated manner.
5. The invention assembles the shock absorber strut assembly 11 at the front part of the suspension lower control arm assembly 8, and avoids enough space for arranging the right driving shaft 3 and the left driving shaft 7.
6. The invention integrates a motor and a speed reducer into a two-in-one drive axle 5.
7. According to the invention, the two-in-one drive axle 5 is assembled in the inner cavity of the auxiliary frame 4, the inner space of the auxiliary frame 4 is fully utilized, the two-in-one drive axle is effectively protected, and the drive axle is connected with the drive half shafts on two sides, so that the rear drive of the electric vehicle is realized.
8. According to the invention, the motor controller 6 is arranged at the rear upper part of the auxiliary frame 4, so that the upper space of the auxiliary frame is fully utilized, and the motor controller is effectively protected.
9. The toe angle adjusting control arm assembly 10 can adjust the toe angle of the independent suspension assembly off line to reach a design state, and when the whole assembly is assembled to a whole vehicle, the toe angle requirement of the whole vehicle can be met only by fine adjustment or no adjustment, so that the debugging time of the whole vehicle is saved, and the qualified rate of passing lines is improved.
10. The invention connects a brake component assembly 1 with a suspension mechanism consisting of a suspension lower control arm assembly 8, a suspension upper control arm assembly 9 and a toe angle adjusting control arm assembly 10 through a rear hub bracket 2.
11. According to the invention, the whole assembly and the whole vehicle can be assembled only by connecting 4 frame mounting points of the auxiliary frame 4 to the frame through bolts, so that the assembly efficiency is greatly improved, and the assembly time and cost are saved.
12. According to the invention, through matching and debugging of performance parts such as the professional chassis shock absorber 111, the spring 110, the buffer block 112, the rear shock absorber upper support assembly 113, the control arm bushing and the like, the vehicle achieves proper understeer degree, the control stability is greatly improved, the pitching performance of the vehicle is balanced, and the road vibration isolation feeling, the driving controllability and the comfort are greatly improved.
The invention has the beneficial effects that: 1. according to the invention, through reasonable spatial arrangement and part structures, 5 systems including a complex double-cross-arm independent suspension system 13, a brake system 14, a transmission system 15, an electric drive system 16 and a motor control system 17 are compactly arranged, so that the occupied space is small, and high-density integration of functions is realized; 2. the power distribution and space requirements of the electric vehicle are met, so that the electric vehicle has better driving and driving performances; 3. the whole vehicle assembly process is simple, the operation is simple, the efficiency is high, and the reduction of production energy consumption is facilitated; 4. the invention can realize different configurations of the whole vehicle and platformization expansion of vehicle types with different sizes of vehicle systems, and the built framework has excellent ductility; 5. the double-cross-arm independent suspension device of the rear-drive electric vehicle is more flexible and excellent in performance adjustability, can adapt to the performance requirements of the whole vehicle by adjusting the hard point structure of the double-cross-arm suspension in combination with different finished vehicle mass centers, inertia centers and motion centers, is large in performance bandwidth of debugging, is easier to match and debug with the front suspension, and enables the vehicle to achieve expected performance expectations, such as the pertinence improvement on the understeer degree, the control stability and the riding comfort of the whole vehicle; 6. the rear wheel toe angle adjustable control arm assembly can complete adjustment of a rear wheel toe angle when the rear suspension assembly is separately assembled, off-line qualification rate of the adjusted parameters after the whole vehicle is assembled is high, after the rear suspension assembly is assembled to the whole vehicle, toe angle requirements of the whole vehicle can be met only by fine adjustment or no adjustment, whole vehicle debugging time is saved, and one-time passing qualification rate of four-wheel positioning parameters is improved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The utility model provides a two xarm independent suspension devices of rear-guard electric motor car which characterized in that: the brake system comprises two brake component assemblies (1), two rear wheel hub brackets (2), a right driving shaft (3), an auxiliary frame (4), a two-in-one driving axle (5), a motor controller (6), a left driving shaft (7), two suspension mechanisms and two shock absorber strut assemblies (11), wherein the brake component assemblies (1), the rear wheel hub brackets (2) and the suspension mechanisms are arranged on one side of the auxiliary frame (4), the brake component assemblies (1) are connected with the suspension mechanisms through the rear wheel hub brackets (2), and the shock absorber strut assemblies (11) are arranged on the suspension mechanisms; the other side of the auxiliary frame (4) is provided with another brake component assembly (1), another rear wheel hub bracket (2) and another suspension mechanism, the other brake component assembly (1) is connected with the other suspension mechanism through the other rear wheel hub bracket (2), and the other suspension mechanism is provided with another shock absorber strut assembly (11); two unification transaxles (5) right side drive axle (3) left side drive axle (7) are installed sub vehicle frame (4) inner chamber, two unification transaxles (5) respectively with right side drive axle (3) left side drive axle (7) link to each other, motor controller (6) are installed sub vehicle frame (4) rear upper side.
2. The double wishbone independent suspension device of a rear drive electric vehicle according to claim 1, characterized in that: the suspension mechanism comprises a suspension lower control arm assembly (8), a suspension upper control arm assembly (9) and a toe angle adjusting control arm assembly (10), and the shock absorber strut assembly (11) is mounted on the suspension lower control arm assembly (8).
3. The double wishbone independent suspension device of a rear drive electric vehicle according to claim 2, characterized in that: shock absorber pillar assembly (11) are including spring (110), shock absorber (111), buffer block (112), back shock absorber upper bracket assembly (113), install on shock absorber (111) spring (110), shock absorber (111) one end is installed buffer block (112), back shock absorber upper bracket assembly (113), shock absorber (111) pass through shock absorber upper bracket assembly (113) and frame connection, shock absorber (111) other end is installed on suspension lower control arm assembly (8).
4. A rear drive electric vehicle double wishbone independent suspension device according to claim 3, characterized in that: the spring (110), the shock absorber (111), the buffer block (112) and the rear shock absorber upper support assembly (113) are integrated integrally.
5. The double wishbone independent suspension device of a rear drive electric vehicle according to claim 1, characterized in that: the two-in-one driving axle (5) comprises a motor and a speed reducer, a shell of the motor and a shell of the speed reducer are connected into a whole in a matched mode through bolts, and power transmission is formed inside the motor through gear engagement.
6. The double wishbone independent suspension device of a rear drive electric vehicle according to claim 1, characterized in that: and a frame mounting point is arranged on the auxiliary frame (4), and the auxiliary frame (4) is connected to the frame through the frame mounting point.
7. The double wishbone independent suspension device of a rear drive electric vehicle according to claim 6, characterized in that: this two xarm independent suspension devices of rear-guard electric motor car includes the bolt, the frame mounting point includes first frame mounting point (40), second frame mounting point (41), first frame mounting point (42), fourth frame mounting point (43), first frame mounting point (40) second frame mounting point (41) first frame mounting point (42) fourth frame mounting point (43) pass through respectively the bolt is installed sub vehicle frame (4) around.
8. The double wishbone independent suspension device of a rear drive electric vehicle according to claim 1, characterized in that: the suspension mechanism is integrally assembled with the auxiliary frame (4).
9. The double wishbone independent suspension device of a rear drive electric vehicle according to claim 2, characterized in that: the toe angle adjusting control arm assembly (10) can adjust the toe angle of the independent suspension assembly in an off-line mode.
10. The double wishbone independent suspension device of a rear drive electric vehicle according to claim 2, characterized in that: the auxiliary frame (4) is of a # -shaped upper and lower double-layer structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110811239.7A CN113353176A (en) | 2021-07-19 | 2021-07-19 | Double-cross-arm independent suspension device of rear-drive electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110811239.7A CN113353176A (en) | 2021-07-19 | 2021-07-19 | Double-cross-arm independent suspension device of rear-drive electric vehicle |
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| CN113353176A true CN113353176A (en) | 2021-09-07 |
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| CN202110811239.7A Pending CN113353176A (en) | 2021-07-19 | 2021-07-19 | Double-cross-arm independent suspension device of rear-drive electric vehicle |
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Cited By (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114701318A (en) * | 2022-04-06 | 2022-07-05 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Torsion beam type semi-independent suspension electric drive rear axle assembly |
| CN114701318B (en) * | 2022-04-06 | 2024-06-21 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Torsion beam type semi-independent suspension electrically-driven rear axle assembly |
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Application publication date: 20210907 |
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