Automobile driving system and automobile

Abstract

The utility model provides an automobile driving system and an automobile, the automobile driving system comprises a first driving motor, the first driving motor comprises a first rotor, the first rotor is provided with a first rotor shaft, and one end of the first rotor shaft is provided with a first friction disc; the first rotor shaft is in transmission connection with the first speed reducer, and the first rotor shaft outputs power to wheels of the automobile through the first speed reducer; the brake is fixedly arranged, the brake is provided with a first friction plate, the first friction plate and the first friction disc are oppositely arranged, and the first friction plate and the first friction disc are configured to be controllably combined or separated, so that rotation of the first rotor shaft is hindered during combination, and braking of the wheels is achieved. According to the automobile driving system and the automobile, the brake can be arranged in front of the speed reducer, the brake torque is reduced, the brake load is reduced, the heating value is reduced, the size and cost of the brake are reduced, environmental pollution is small, and the service life is greatly prolonged.

Description

Technical Field

[0001] This application relates to the field of automotive technology, specifically to automotive drive systems and automobiles. Background Technology

[0002] The braking system of a passenger car is an essential component of the vehicle chassis, typically located around the tires within the wheel hub. However, this location results in the braking system bearing high wheel torque, heavy braking load, and operating in a harsh environment, making it prone to problems such as abnormal noise and rust. In addition, the cooling method in this area is usually air cooling, which poses a risk of overheating and often requires a larger size for heat dissipation, leading to a larger brake unit size and the need for additional hydraulic lines, resulting in higher costs. Utility Model Content

[0003] To at least partially solve the above problems, according to a first aspect of this application, an embodiment of this application provides an automobile drive system, comprising: a first drive motor, the first drive motor including a first rotor, the first rotor having a first rotor shaft, and a first friction disc disposed at one end of the first rotor shaft; a first reducer, the first rotor shaft being drivenly connected to the first reducer, the first rotor shaft outputting power to the wheels of the automobile through the first reducer; and a brake, the brake being fixedly disposed, the brake being provided with a first friction pad, the first friction pad being disposed opposite to the first friction disc, wherein the first friction pad and the first friction disc are configured to be controllably engaged or disengaged, so as to impede the rotation of the first rotor shaft when engaged, thereby achieving braking of the wheels.

[0004] In some embodiments, the brake includes: a brake body, which is cylindrical, and a first friction pad that is slidably disposed on a bottom surface of the brake body along the axis of the brake body; a brake shaft, which is coaxially disposed with a first rotor shaft, and the brake body is rotatably disposed on the brake shaft, with the axis of the brake body being coaxial with the brake shaft; and a fixed seat, which is fixedly disposed and opposite to the side of the brake body, and a brake pin is disposed on the fixed seat, the brake pin being retractably disposed on the fixed seat, and a brake groove is provided at a position corresponding to the brake pin on the brake body, the brake pin being able to enter the brake groove to lock the rotation of the brake body.

[0005] In some embodiments, the brake further includes a stepper motor, the output shaft of which is fixedly connected to the brake pin, and the stepper motor is used to drive the brake pin into or out of the brake groove.

[0006] In some embodiments, an electromagnetic coil is provided inside the brake body to provide power for the sliding of the first friction pad; a wire is provided inside the brake pin to connect to the vehicle's power supply; a first conductive contact is provided at the end of the brake pin and is connected to the wire; a second conductive contact is provided inside the brake groove and is electrically connected to the electromagnetic coil; when the brake pin enters the brake groove, the first conductive contact contacts the second conductive contact so that the vehicle's power supply can power the electromagnetic coil.

[0007] In some embodiments, a capacitor is also provided inside the brake body, and the capacitor is electrically connected to the electromagnetic coil.

[0008] In some embodiments, the mounting base is annular and is fixedly mounted on the electric drive housing of the vehicle drive system. The mounting base is sleeved on the outside of the brake body and is concentrically arranged with the brake body.

[0009] In some embodiments, the vehicle drive system further includes: a second drive motor, the second drive motor including a second rotor having a second rotor shaft coaxially arranged with a first rotor shaft, and a second friction disc disposed at one end of the second rotor shaft; a second reducer, the second rotor shaft being drively connected to the second reducer, the second rotor shaft outputting power to the other wheel of the vehicle through the second reducer; and a brake disposed between the first and second friction discs, the brake further comprising a second friction pad disposed opposite to the second friction disc, wherein the second friction pad and the second friction disc are configured to be controllably engaged or disengaged to impede the rotation of the second rotor shaft when engaged, thereby braking the other wheel.

[0010] In some embodiments, the vehicle drive system further includes an oil pump, which is disposed on an oil supply line. The inlet of the oil supply line is located at the oil pan of the electric drive of the vehicle drive system, and a first cooling nozzle is disposed at the outlet of the oil supply line. The first cooling nozzle is disposed opposite to the brake, and the spray direction of the first cooling nozzle is towards the brake.

[0011] In some embodiments, the first drive motor further includes a first stator, and the second drive motor further includes a second stator; a second cooling nozzle and a third cooling nozzle are provided at the outlet of the oil pipeline; the second cooling nozzle is disposed opposite to the first stator, and the spray direction of the second cooling nozzle is towards the first stator; the third cooling nozzle is disposed opposite to the second stator, and the spray direction of the third cooling nozzle is towards the second stator.

[0012] According to a second aspect of this application, embodiments of this application provide an automobile, including the automobile drive system provided in any embodiment of the first aspect of this application.

[0013] The vehicle drive system and vehicle provided in the embodiments of this application, through the cooperation of friction pads and friction discs, enable the brake to directly brake the rotor shaft of the drive motor. This arrangement allows the brake to be placed before the reducer, reducing braking torque, braking load, heat generation, and brake size and cost. At the same time, the close proximity of the brake to the drive motor allows the brake to be placed inside the electric drive or transmission of the drive system, resulting in less environmental pollution and a significantly longer lifespan. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of an automotive drive system provided in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of an automobile drive system provided in another embodiment of this application;

[0017] Figure 3 This is a schematic diagram of a portion of the structure of the brake provided in an embodiment of this application;

[0018] Figure 4 This is a schematic diagram showing that the brake pin is located outside the brake groove according to an embodiment of this application;

[0019] Figure 5 This is a schematic diagram showing the brake pin located in the brake groove according to an embodiment of this application.

[0020] The attached figures are labeled as follows:

[0021] 1. First friction disc; 2. First friction pad; 3. Second friction pad; 4. Second friction disc; 5. Brake; 6. Mounting seat; 7. Brake pin; 8. First cooling nozzle; 9. Rotor; 10. First bearing; 11. Second bearing; 12. Stator; 13. High voltage cable; 14. Oil pan; 15. Oil filter; 16. Oil pump; 17. Oil cooler; 18. Second cooling nozzle; 19. Third cooling nozzle; 20. Motor controller; 21. Reducer; 22. Left wheel; 23. Right wheel; 24. Rotor shaft; 25. Brake shaft; 26. Brake groove; 27. Slide rail; 28. Brake body.

[0022] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0023] The preferred embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection claimed in this application.

[0024] The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0025] like Figure 1 and Figure 2 As shown, according to the first aspect of this application, an embodiment of this application provides an automobile drive system, including a first drive motor, a first reducer, and a brake 5. The drive motor can provide the driving force required for the movement of the entire vehicle. The drive motor may include a stator 12, a rotor 9, a first bearing 10, a second bearing 11, and a rotor shaft 24. The stator 12 is fixedly disposed, and the rotor 9 can rotate around the rotor shaft 24. The two ends of the rotor shaft 24 are rotatably connected to the first bearing 10 and the second bearing 11, respectively. In this embodiment, the first drive motor includes a first rotor, the first rotor has a first rotor shaft, the first rotor can rotate around the first rotor shaft, and a first friction disc 1 is disposed at one end of the first rotor shaft; the first rotor shaft is drivenly connected to the first reducer, and the first rotor shaft transmits power to the wheels of the vehicle (e.g., the wheels of the vehicle) through the first reducer. Figure 1 and Figure 2 The left wheel 22 in the drive motor outputs power, and the reducer can reduce the output speed of the drive motor and increase the output torque of the drive motor; the brake 5 is fixedly installed and is provided with a first friction plate 2, which is arranged opposite to the first friction disc 1. The first friction plate 2 and the first friction disc 1 are configured to be able to engage or disengage in a controlled manner, so as to impede the rotation of the first rotor shaft when engaged, thereby achieving the control of the wheel (e.g., the left wheel 22). Figure 1 and Figure 2 Braking of the left wheel (22) in the middle. For example... Figure 1 and Figure 2As shown, the brake 5 can be located on the side of the first rotor shaft away from the first reducer, or it can be located on the side of the first rotor shaft closer to the first reducer. Preferably, for a dual-motor drive system, the brake 5 can be located between the two drive motors, i.e., on the side of the first rotor shaft away from the first reducer, to reduce the cost of the brake 5 and simplify the structure. In this embodiment, the first friction plate 2 and the first friction disc 1 can have a clutch-like structure; the brake 5 can be located inside the housing of the electric drive of the vehicle drive system for fixation.

[0026] The automotive drive system provided in the embodiments of this application allows the brake 5 to directly brake the rotor shaft 24 of the drive motor through the cooperation of friction pads and friction discs. This arrangement allows the brake 5 to be positioned before the reducer 21, reducing braking torque, braking load, heat generation, and the size and cost of the brake 5. At the same time, the close proximity of the brake 5 to the drive motor allows the brake 5 to be positioned inside the electric drive or gearbox of the drive system, resulting in less environmental pollution and a significantly longer lifespan.

[0027] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the brake 5 includes: a brake body 28, a brake shaft 25, a fixed seat 6, and a brake pin 7. The brake body 28 is cylindrical, and the first friction pad 2 is slidably disposed on a bottom surface of the brake body 28 along the axis of the brake body 28. The brake shaft 25 is coaxially disposed with the first rotor shaft, and the brake body 28 is rotatably disposed on the brake shaft 25, with the axis of the brake body 28 coaxial with the brake shaft 25. The fixed seat 6 is fixedly disposed and opposite to the side of the brake body 28, and a brake pin 7 is disposed on the fixed seat 6. The brake pin 7 is retractably disposed on the fixed seat 6, and a brake groove 26 is provided at the position corresponding to the brake pin 7 on the brake body 28. The brake pin 7 can enter the brake groove 26 to lock the rotation of the brake body 28. In this embodiment, the friction pad can be slidably connected to the brake body 28 through a slide rail 27 structure. For example, a slide rail 27 can be provided on the friction pad, and a corresponding slide groove can be provided on the brake body 28. The friction pads change position by sliding to contact the friction disc, generating a braking friction force on the rotor shaft 24. In some embodiments, the brake 5 further includes a stepper motor, the output shaft of which is fixedly connected to the brake pin 7. The stepper motor is used to drive the brake pin 7 into or out of the brake groove 26.

[0028] In some embodiments, an electromagnetic coil is provided inside the brake body 28 to provide power for the sliding of the first friction pad 2; a wire is provided inside the brake pin 7 for connection to the vehicle's power supply; a first conductive contact is provided at the end of the brake pin 7 and is connected to the wire; a second conductive contact is provided inside the brake groove 26 and is electrically connected to the electromagnetic coil; when the brake pin 7 enters the brake groove 26, the first conductive contact contacts the second conductive contact, so that the vehicle's power supply can supply power to the electromagnetic coil. In this embodiment, the friction pad and friction disc form a structure similar to an electromagnetic clutch. By driving the friction pad with electricity, the structure of the brake 5 can be simplified and the working stability improved.

[0029] In some embodiments, a capacitor is also provided inside the brake body 28, and the capacitor is electrically connected to the electromagnetic coil. In this embodiment, by providing the capacitor, when the brake pin 7 moves out of the brake groove 26 and the power is cut off, the capacitor can temporarily supply power to the electromagnetic coil, thereby maintaining the driving force of the friction pad for a short period of time to cope with unexpected situations.

[0030] In some embodiments, the mounting base 6 is annular and is fixedly mounted on the electric drive housing of the vehicle drive system. The mounting base 6 is sleeved on the outside of the brake body 28 and is concentrically arranged with the brake body 28. In this embodiment, this arrangement allows the brake 5 to have a more compact structure and ensures operational stability.

[0031] Combination Figure 1 and Figure 2 In some embodiments, the vehicle drive system further includes: a second drive motor, the second drive motor including a second rotor, the second rotor having a second rotor shaft, the second rotor shaft being coaxially arranged with a first rotor shaft, and a second friction disc 4 being disposed at one end of the second rotor shaft; and a second reducer, the second rotor shaft being drively connected to the second reducer, the second rotor shaft being driven by the second reducer to the other wheel of the vehicle (e.g., Figure 1 and Figure 2 The right wheel 23 in the middle outputs power; the brake 5 is disposed between the first friction disc 1 and the second friction disc 4, and the brake 5 is also provided with a second friction pad 3, which is disposed opposite to the second friction disc 4. The second friction pad 3 and the second friction disc 4 are configured to be able to engage or disengage in a controlled manner, so as to impede the rotation of the second rotor shaft when engaged, thereby enabling the other wheel (e.g., the right wheel 23 in the middle) to output ... Figure 1 and Figure 2 The braking of the right wheel 23). In this embodiment, the vehicle drive system is a dual-motor drive, with each drive motor driving one wheel respectively, and the brake 5 is located between the two drive motors, which can brake the rotor shafts 24 of the two electric drive motors simultaneously. The structure is simple and the cost is low.

[0032] In some embodiments, the vehicle drive system further includes an oil pump 16, which is disposed on an oil supply line. The inlet of the oil supply line is located at the oil pan 14 of the electric drive of the vehicle drive system, and a first cooling nozzle 8 is disposed at the outlet of the oil supply line. The first cooling nozzle 8 is disposed opposite to the brake 5, and the spray direction of the first cooling nozzle 8 is towards the brake 5. In this embodiment, cooling of the brake 5 is achieved by sharing the transmission oil cooling system, which increases heat dissipation efficiency and can further reduce the size of the friction pads, thereby reducing costs. In some embodiments, the first cooling nozzle 8 can be integrated into the housing of the electric drive, eliminating the need for a separate part, which can further reduce system size and material costs.

[0033] In some embodiments, the first drive motor further includes a first stator, and the second drive motor further includes a second stator; a second cooling nozzle 18 and a third cooling nozzle 19 are provided at the outlet of the oil pipeline; the second cooling nozzle 18 is disposed opposite to the first stator, and the spray direction of the second cooling nozzle 18 is towards the first stator; the third cooling nozzle 19 is disposed opposite to the second stator, and the spray direction of the third cooling nozzle 19 is towards the second stator. In this embodiment, the transmission oil cooling system can cool the stators of the two drive motors. The transmission oil cooling system may also include an oil filter 15 and an oil cooler 17 disposed on the oil pipeline. The oil filter 15 is used to filter the cooling oil, and the oil cooler 17 is used to cool the cooling oil. In some embodiments, the vehicle drive system further includes a motor controller 20 and a high-voltage bus 13. The motor controller 20 is connected to the first stator and the second stator respectively through the high-voltage bus 13. Specifically, the high-voltage bus 13 may be a high-voltage copper busbar UVW.

[0034] According to a second aspect of this application, embodiments of this application provide an automobile, including the automobile drive system provided in any embodiment of the first aspect of this application.

[0035] The vehicle drive system provided in the embodiments of this application can realize three functions and mode switching, and its working principle is as follows:

[0036] 1. Normal free state: At this time, the friction pad and friction disc are not engaged, the brake pin 7 is inserted into the brake groove 26, locking the fixed seat 6 and the brake body 28, and the power system drives normally.

[0037] 2. Braking state: At this time, the friction pads and friction discs are engaged, the brake pin 7 is inserted into the brake groove 26, locking the fixed seat 6 and the brake body 28, and the power system completes braking.

[0038] 3. Clutch state: At this time, the friction pads and friction discs are engaged, the brake pin 7 is located outside the brake groove 26, the locking state of the fixed seat 6 and the brake body 28 is canceled, the fixed seat 6 and the brake body 28 can move relative to each other, the power system completes the engagement of the left and right axles, and completes dual-wheel drive when the single-side drive motor fails and cannot drive.

[0039] The vehicle drive system and vehicle provided in the embodiments of this application adopt a scheme that integrates the brakes into the transmission. The brakes are arranged in front of the reducer, reducing braking torque, heat generation, and brake size and cost. The cooling method is changed from air cooling to oil cooling, sharing the transmission oil cooling system, increasing heat dissipation efficiency, thereby reducing the size of the brake friction pads and significantly reducing costs. At the same time, the brake can achieve both braking and clutch functions through the brake pin structure. In addition, the brakes can be arranged inside the reducer, resulting in less environmental pollution, lower load, better cooling, and a significantly longer lifespan.

[0040] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0041] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. An automotive drive system characterized by comprising: include: A first drive motor, the first drive motor includes a first rotor, the first rotor has a first rotor shaft, and a first friction disc is provided at one end of the first rotor shaft; The first reducer is connected to the first rotor shaft, and the first rotor shaft outputs power to the wheels of the car through the first reducer. A brake is fixedly installed and has a first friction pad disposed opposite to a first friction disc. The first friction pad and the first friction disc are configured to engage or disengage in a controllable manner to impede the rotation of the first rotor shaft when engaged, thereby braking the wheels.

2. The automotive drive system according to claim 1, characterized by The brake includes: The brake body is cylindrical, and the first friction pad is slidably disposed on one bottom surface of the brake body along the axis of the brake body. A brake shaft is coaxially arranged with the first rotor shaft, and the brake body is rotatably arranged on the brake shaft, with the axis of the brake body being coaxial with the brake shaft. A fixed base is fixedly installed and opposite to the side of the brake body. A brake pin is provided on the fixed base. The brake pin is retractably installed on the fixed base. A brake groove is opened at the position corresponding to the brake pin on the brake body. The brake pin can enter the brake groove to lock the rotation of the brake body.

3. The automotive drive system according to claim 2, characterized by The brake also includes a stepper motor, the output shaft of which is fixedly connected to the brake pin. The stepper motor is used to drive the brake pin into or out of the brake groove.

4. The vehicle drive system according to claim 2, characterized in that, An electromagnetic coil is provided inside the brake body, and the electromagnetic coil is used to provide power for the sliding of the first friction plate. The brake pin has a wire inside, which is used to connect to the vehicle's power supply. The end of the brake pin has a first conductive contact, which is connected to the wire. A second conductive contact is provided in the brake groove, and the second conductive contact is electrically connected to the electromagnetic coil; When the brake pin enters the brake groove, the first conductive contact contacts the second conductive contact, so that the vehicle's power supply can supply power to the electromagnetic coil.

5. The vehicle drive system according to claim 4, characterized in that, The brake body also contains a capacitor, which is electrically connected to the electromagnetic coil.

6. The vehicle drive system according to claim 2, characterized in that, The mounting base is annular and is fixedly mounted on the electric drive housing of the vehicle drive system. The mounting base is sleeved on the outside of the brake body and is concentrically arranged with the brake body.

7. The automotive drive system of claim 1, wherein Also includes: The second drive motor includes a second rotor, the second rotor has a second rotor shaft, the second rotor shaft is coaxially arranged with the first rotor shaft, and a second friction disc is provided at one end of the second rotor shaft; The second reducer is connected to the second rotor shaft in a transmission connection, and the second rotor shaft outputs power to the other wheel of the car through the second reducer. The brake is disposed between the first friction disc and the second friction disc, and the brake is further provided with a second friction pad, which is disposed opposite to the second friction disc. The second friction pad and the second friction disc are configured to be controllably engaged or disengaged so as to impede the rotation of the second rotor shaft when engaged, thereby achieving braking of the other wheel.

8. The automotive drive system according to claim 7, characterized by It also includes an oil pump, which is installed on the oil supply line. The inlet of the oil supply line is located at the oil pan of the electric drive of the vehicle drive system. A first cooling nozzle is provided at the outlet of the oil supply line. The first cooling nozzle is arranged opposite to the brake and the spray direction of the first cooling nozzle is towards the brake.

9. The vehicle drive system according to claim 8, characterized in that, The first drive motor further includes a first stator, and the second drive motor further includes a second stator; The oil pipeline is equipped with a second cooling nozzle and a third cooling nozzle at its outlet. The second cooling nozzle is disposed opposite to the first stator, and the spray direction of the second cooling nozzle is towards the first stator; The third cooling nozzle is disposed opposite to the second stator, and the spray direction of the third cooling nozzle is toward the second stator.

10. An automobile characterized by comprising: Including the vehicle drive system as described in any one of claims 1-9.

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