CN204956076U - Electric automobile torsion beam formula actuating system - Google Patents

Abstract

The utility model discloses a torsion beam type drive system for an electric vehicle, which comprises a torsion beam. Motors are symmetrically fixed at both ends of the torsion beam, and the motor is connected to a wheel hub through a speed reducer. The utility model integrates the torsion beam suspension and the electric wheel of the wheel-side reducer to form the driving system of the electric vehicle, which can not only meet the normal power requirements of the small electric vehicle, but also reduce the quality of the whole vehicle. The design transmission ratio is large and the mechanical transmission efficiency is high. .

Description

An electric vehicle torsion beam drive system

technical field

The utility model relates to the field of electric vehicles, in particular to a torsion beam drive system for electric vehicles.

Background technique

Wheel drive electric vehicle is an emerging form of electric vehicle drive. It directly installs the motor on the wheel side, omitting the clutch, transmission, final reducer and differential of the traditional car, which greatly simplifies the structure of the whole vehicle, improves the transmission efficiency, and can realize the control of the electric wheel through the control technology. Electronic differential control. Therefore, electric wheeled electric vehicles will become the development direction of electric vehicles in the future.

The electric wheel electric drive system has two basic forms: direct drive electric wheel and wheel side reducer electric wheel. The electric motor and the wheel of the direct-drive electric vehicle form a complete component assembly, and the electronic differential speed control method is adopted. The electric motor is arranged inside the wheel, and the wheel is directly driven to drive the car.

The wheel-side reducer electric wheel drive system can adapt to the operation requirements of modern high-performance electric vehicles, and belongs to the deceleration drive type. Torsion beam suspension is widely used in the rear suspension of small cars. At present, many ordinary small cars adopt the arrangement of front McPherson independent suspension and rear torsion beam suspension.

In view of the universal applicability of the torsion beam suspension on small cars, the utility model combines the electric wheel drive system of the wheel reducer with the torsion beam suspension to design a torsion beam wheel drive system, in order to be used in small electric vehicles be promoted and applied.

Utility model content

The technical problem to be solved by the utility model is to realize an electric vehicle drive system that combines the torsion beam suspension and the electric wheel of the wheel side reducer.

In order to achieve the above purpose, the technical solution adopted by the utility model is a torsion beam driving system for an electric vehicle, including a torsion beam, and motors are symmetrically fixed at both ends of the torsion beam, and the motor is connected to the wheel hub through a reducer.

The reducer includes a reducer driving gear, a reducer intermediate shaft transmission gear I, a reducer intermediate shaft transmission gear II, a reducer power output gear, a reducer output shaft speed measuring gear, a reducer intermediate shaft and a reducer power output shaft; The output shaft of the motor is connected to the drive gear of the reducer, and the drive gear of the reducer meshes with the intermediate shaft transmission gear I of the reducer; the intermediate shaft transmission gear I of the reducer is fixedly connected to the intermediate shaft of the reducer, and The intermediate shaft is provided with the transmission gear II of the intermediate shaft of the reducer, and the transmission gear II of the intermediate shaft of the reducer meshes with the power output gear of the reducer on the output shaft of the reducer, and the output shaft of the reducer is fixedly connected with the brake disc. Both the power output gear of the reducer and the speed measuring gear of the output shaft of the reducer are consolidated with the power output shaft of the reducer.

The hub is provided with a braking system, and the braking system includes a brake disc, a brake caliper, a brake caliper mounting bracket, and a brake caliper mounting bracket fixing part. The brake caliper and the brake caliper mounting bracket pass through The bolts and nuts are fixedly connected; the brake caliper mounting bracket and the brake caliper mounting bracket fixing part are fixedly connected by bolts; the brake caliper mounting bracket fixing part is fixedly connected with the reducer output shaft axle housing; the brake disc is provided with a brake Disc bosses, threaded holes are provided on the bosses, hub bosses are provided on the hub, threaded holes are opened on the hub bosses, and the brake disc bosses are fixedly connected to the hub bosses by bolts and nuts .

Both sides of the torsion beam are provided with shock absorber mounts, and the shock absorbers are symmetrically fixed on the torsion beam through the shock absorber mounts.

The two hubs connected with the motor are the rear wheels of the electric vehicle.

Both ends of the torsion beam are provided with longitudinally extending supports, one end of the support is fixedly connected to the motor casing, and the other end is provided with a mounting hole for the torsion beam and the vehicle body, and the rear cover of the motor casing is provided with a support Shock absorber mounts extending from the body.

The power output gear of the reducer, the intermediate shaft transmission gear II of the reducer, the intermediate shaft transmission gear I of the reducer, and the driving gear of the reducer are all helical cylindrical gears, and the speed measuring gear of the output shaft of the reducer is a spur cylindrical gear.

The utility model integrates the torsion beam suspension and the electric wheel of the wheel side reducer to form an electric vehicle drive system, which can not only meet the normal power requirements of small electric vehicles, but also reduce the quality of the whole vehicle, with a large design transmission ratio and high mechanical transmission efficiency , specifically, has the following advantages:

From a structural point of view, most of the current wheel reduction systems of electric vehicles are planetary gear direct drive wheel reduction systems, but the internal structure of the planetary gear drive hub is complex and increases the quality of the hub, which is not conducive to the ride comfort and ride comfort of the car. The wheels also needed a new design. Compared with the planetary gear wheel drive system, the utility model puts the drive motor, drive mechanism, and transmission mechanism on the torsion beam, and the wheel hub can use the existing hub, and the design space of the gear of the transmission mechanism is larger, and the optional range of the reduction ratio is wider. wide.

From the perspective of component manufacturing, the planetary gear structure has internal gears. When the number of internal ring gears and planetary gears is not selected properly during assembly, the planetary gears will be eccentrically loaded, which requires high precision parts. Moreover, the processing of the internal teeth is more complicated and the cost is higher during manufacture. All the gears of the drive system of the utility model are common helical gears with external teeth, the manufacture is more generalized, the standardized production is easier, and the operation space is larger during assembly, which undoubtedly reduces the manufacturing and labor costs.

Description of drawings

The following is a brief description of the content expressed in each piece of drawings in the specification sheet of the utility model and the marks in the figure:

Figure 1 is a schematic diagram of the unilateral structure of the drive system;

Fig. 2 is the layout diagram of the deceleration drive system of the drive system;

Fig. 3 is the layout diagram of the braking system of the driving system;

Fig. 4 is a power input layout diagram of the drive system;

Fig. 5 is the arrangement diagram of the torsion beam system and the damping system of the drive system;

Fig. 6 is the wheel hub structural diagram of driving system;

Fig. 7 is a structural diagram of the braking system of the drive system;

Fig. 8 is the structural diagram of the deceleration drive system of the drive system;

Fig. 9 is a structural diagram of the power input system of the drive system;

Fig. 10 is the structural diagram of the damping system and the torsion beam system of the driving system;

Fig. 11 is a structural diagram of the reducer housing of the drive system;

Figure 12 is a disassembled view of the drive system;

Figure 13 is an assembly structure diagram of the drive system;

The marks in the above figures are: 1. Wheel; 2. Reducer; 3. Motor; 4. Shock absorber; 5. Hub; 6. Power output gear of reducer; 7. Intermediate shaft transmission gear II of reducer; . Reducer intermediate shaft transmission gear I; 9. Reducer output shaft speed measuring gear; 10. Reducer drive gear; 11. Reducer output shaft axle housing; 12. Brake caliper mounting bracket fixture; 13. Brake caliper installation Bracket; 14. Brake caliper; 15. Brake disc; 16. Reinforcement rib of reducer housing; 17. Motor power output shaft; 18. Intermediate shaft of reducer; 19. Reducer power output shaft; 20. Torsion beam installation Bolt hole; 21. Front cover of motor housing; 22. Torsion beam; 23. Motor maintenance box; 24. Wheel mounting threaded hole; 25. Tire valve mounting hole; 26. Reducer housing mounting threaded hole; 27. Motor wiring box; 28. reducer power output shaft mounting seat; 29. reducer shell mounting screw hole; 30. shock absorber mounting seat; 31. reducer shell mounting bolts; 32. shock absorber piston rod dust-proof holster ; 33, shock absorber outer cylinder; 34, shock absorbing spring; 35, torsion beam and body mounting hole; 36, oil hole bolt; 37, reducer oil hole; 38, reducer housing threaded hole.

detailed description

With reference to the accompanying drawings, through the description of the embodiments, the specific implementation of the present utility model, such as the shape, structure, mutual position and connection relationship between each part, the role and working principle of each part involved in the utility model, will be described as follows: Further detailed descriptions are provided to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solutions of the present utility model.

As shown in Figures 1-5 and Figure 8, the torsion beam drive system of an electric vehicle is a rear drive system, the rear suspension of the vehicle is a torsion beam 22, and the two ends of the torsion beam 22 are symmetrically fixed with a motor 3, and the motor 3 passes through the reducer 2 Connected with the hub 5, the two hubs 5 connected with the motor 3 are the rear wheels of the electric vehicle, and the two rear wheels are independently driven by the two motors 3 and the reducer 2 thereof.

As shown in Figures 2, 8, and 12, the reducer 2 mainly includes the reducer driving gear 10 (first-stage reduction gear), the reducer intermediate shaft transmission gear I8 (first-stage reduction gear), and the reducer intermediate shaft transmission gear II7 (secondary reduction gear). Stage reduction gear), reducer power output gear 6 (secondary reduction gear), reducer output shaft speed measuring gear 9, motor power output shaft 17, reducer intermediate shaft 18 and reducer power output shaft 19. The reducer driving gear 10 meshes with the reducer intermediate shaft transmission gear I8 (primary reduction gear) on the reducer intermediate shaft 18 to form a primary reduction mechanism; the reducer intermediate shaft transmission gear II7 (secondary reduction gear) and the reduction gear Reducer power output gear 6 (two-stage reduction gear) meshing transmission on the device power output shaft 19 constitutes a two-stage reduction mechanism.

Below with reference to accompanying drawing, the connection relationship of each part is described in detail:

The output shaft of the motor 3 is connected to the drive gear 10 of the reducer, and the drive gear 10 of the reducer meshes with the transmission gear I8 of the intermediate shaft of the reducer; There is a reducer intermediate shaft transmission gear II7 meshing with the reducer power output gear 6 on the reducer output shaft; the brake disc 15 is fixedly connected with the reducer power output shaft 19, and the reducer power output gear 6 is connected with the reducer The speed measuring gear 9 of the output shaft is all consolidated with the power output shaft 19 of the reducer.

In order to better improve the working efficiency and stability of reducer 2, reducer power output gear 6 (two-stage reduction gear), reducer intermediate shaft transmission gear II7 (two-stage reduction gear), reducer intermediate shaft transmission gear I8 ( One-stage reduction gear), reducer driving gear 10 (one-stage reduction gear) are all helical cylindrical gears, and the speed measuring gear 9 of the output shaft of the reducer is a straight-toothed cylindrical gear.

The specific driving principle of the above-mentioned reducer 2 is as follows: the reduction drive motor 3 inputs power to the motor power output shaft 17, drives the reducer drive gear 10 on the motor power output shaft 17, the reducer drive gear 10 and the reducer intermediate shaft transmission gear 18 Keep the constant mesh, and then drive the reducer intermediate shaft transmission gear I8 to rotate, the reducer intermediate shaft transmission gear I8 drives the reducer intermediate shaft 18 to rotate, and the reducer intermediate shaft transmission gear II7 fixed on the reducer intermediate shaft 18 rotates accordingly, Then it drives the reducer power output gear 6 which is constantly meshed with it to rotate, and the reducer power output gear 6 transmits power to the wheel hub 5 through the reducer power output shaft 19 to realize deceleration and torque increase.

Due to the adoption of multi-stage transmission, the transmission ratio of the deceleration drive system can be significantly increased, thereby reducing the size of the deceleration drive motor 3, which not only makes the structure compact, but also has good processing, assembly and maintenance performance, and can improve the performance of the electric wheel 1 side drive system. overall service life.

As shown in FIGS. 3 and 7 , a braking system is provided on the wheel hub 5 , and the braking system includes a brake disc 15 , a brake caliper 14 , a brake caliper mounting bracket 13 , and a brake caliper mounting bracket fixture 12 . Wherein the brake caliper 14 is fixedly connected with the brake caliper mounting bracket 13 through bolts and nuts; the brake caliper mounting bracket 13 is fixedly connected with the brake caliper mounting bracket fixing part 12 through bolts; the brake caliper mounting bracket fixing part 12 is connected with the reducer output The axle housing 11 is fixedly connected. The brake disc 15 is provided with a boss of the brake disc 15, and the boss is provided with a threaded hole; The bosses are fixedly connected by bolts and nuts.

As shown in Figures 1-3 and Figure 10, a torsion beam suspension system is installed on the motor 3 shell, and the torsion beam suspension system includes a shock absorber 4, a torsion beam 22, a geared motor 3, a torsion beam 22, and a geared motor 3 shell The bolt holes 20 are fixedly connected to the torsion beam 22 through the torsion beam 22 . The two ends of the torsion beam 22 are provided with a longitudinally extending support body, one end of the support body is fixedly connected with the motor 3 casing, the other end is provided with the torsion beam 22 and the vehicle body mounting hole, and the back cover end of the motor 3 casing is provided with a relief extending from the support body. Shock mounting seat 30. The large end of the shock absorber 4 is placed downwards at the center of the shock absorber spring 34, and is fixedly connected to the shock absorber mount 30. The piston rod of the shock absorber 4 is connected to the vehicle body, and the torsion beam 22 is installed with the vehicle body through the torsion beam 22 at the same time. The holes are also connected to the bodywork so that the left and right unilateral drive systems are connected together. Such an arrangement structure can enhance the balance of the frame.

Based on the torsion beam drive system of the above-mentioned electric vehicle, the motor 3 is connected with the body controller of the electric vehicle; the driving method of the electric vehicle is as follows:

Start the vehicle, system self-check;

When the gear of the vehicle is put into the forward gear, the two motors 3 are simultaneously driven to work at low power. When the vehicle speed reaches the rated value, the motors 3 work in accordance with the accelerator pedal stepping ratio; The power output of 20%-50%, the low power work of initial state like this, can improve the service life of motor 3; Above-mentioned rated value (vehicle speed) can be set according to need, for example be set to 20km/h; Motor 3 according to accelerator pedal The pedaling proportional work is to control the power of the motor 3 according to the driver's control acceleration state;

When the vehicle gear is put into the reverse gear, the vehicle body controller issues an instruction to control the built-in drive motor 3 to work, and the motor 3 reverses at a low speed to achieve reverse, and drives two motors 3 to work at low power at the same time during driving; the low power work of the motor 3 is The power output of 20%-50% under the rated power state of the motor 3, so that the low power operation in the initial state can improve the service life of the motor 3;

When the vehicle gear is put into the climbing gear or the S gear (quick acceleration gear), then drive two motors 3 to work with high power at the same time; the high power work is to control the motor 3 to 90-100% of the rated power state power output.

If the vehicle has a cruising function, when the cruising function is activated while the vehicle is running, the vehicle controls the output power of the two motors 3 according to the current vehicle speed. The motor 3 works with normal power (50%-80% power output under the rated power state of the motor 3), if the vehicle is in a high-speed working condition (for example, the vehicle speed is greater than 40km/h), then the motor 3 is controlled to work at a high power (the rated power of the motor 3 90-100% power output in power state).

Based on the above system and control method, the torsion beam drive system can work under full vehicle speed conditions, not only can drive forward, but also has a reverse function; only the deceleration drive motor 3 is designed to be controlled by the vehicle body to output different power, The motor 3 with torque and rotational speed is sufficient, preferably the AC/DC brushless motor 3, and the output power, torque and rotational speed of the motor 3 are controlled through the vehicle body control system to control the output power, torque and rotational speed of the motor 3. Utilization rate, compared with other electric vehicles that reserve the same electric energy, can increase the mileage of the car.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (7)

1. an electronlmobil torsion girder-like drive system, comprises torsion beam, it is characterized in that: described torsion beam two ends are symmetrically fixed with motor, and described motor is connected with wheel hub by retarder.

2. electronlmobil torsion girder-like drive system according to claim 1, is characterized in that: described retarder comprises retarder driver gear, retarder tween drive shaft transmission gear I, retarder tween drive shaft transmission gear II, reducer power output gear, reducer output shaft measure speed gears, retarder tween drive shaft and reducer power output shaft; The output shaft connection reducer driven wheel of described motor, described retarder driver gear engages with retarder tween drive shaft transmission gear I; Described retarder tween drive shaft transmission gear I is fixed on retarder tween drive shaft, described retarder tween drive shaft is provided with retarder tween drive shaft transmission gear II, described retarder tween drive shaft transmission gear II is meshed with the reducer power output gear on reducer output shaft, described reducer output shaft and brake disc connect firmly, described reducer power output gear and reducer output shaft measure speed gears all with reducer power output shaft consolidation.

3. electronlmobil torsion girder-like drive system according to claim 2, it is characterized in that: described wheel hub is provided with brake system, described brake system comprises brake disc, brake clamp, brake caliper anchor plate, brake caliper anchor plate connecting element, and described brake clamp is fixedly connected with by bolt and nut with brake caliper anchor plate; Brake caliper anchor plate and brake caliper anchor plate connecting element are bolted to connection; Brake caliper anchor plate connecting element is fixedly connected with reducer output shaft axle housing; Described brake disc offers brake disc boss, boss offers tapped bore, described wheel hub offers wheel hub boss, wheel hub boss offers tapped bore, and described brake disc boss and wheel hub boss are fixed by bolt, nut and are connected.

4. the electronlmobil torsion girder-like drive system according to claim 1,2 or 3, is characterized in that: described torsion beam both sides are provided with bumper mount pad, and bumper is fixed in torsion beam by bumper mount pad symmetry.

5. electronlmobil torsion girder-like drive system according to claim 4, is characterized in that: be connected with motor two described wheel hubs are electronlmobil trailing wheel.

6. electronlmobil torsion girder-like drive system according to claim 5, it is characterized in that: described torsion beam two ends are provided with the supporter of longitudinal extension, described supporter one end and motor housing affixed, the other end is provided with torsion beam and vehicle body mounting hole, and described motor housing bonnet end is provided with the bumper mount pad extended by supporter.

7. electronlmobil torsion girder-like drive system according to claim 2, it is characterized in that: described reducer power output gear, retarder tween drive shaft transmission gear II, retarder tween drive shaft transmission gear I, retarder driver gear are helical spur gear, and reducer output shaft measure speed gears is spur wheel.