drive assembly, drive system, axle, chassis and vehicle

Abstract

The application relates to a driving assembly, a driving system, an axle, a chassis and a vehicle, the driving assembly comprising: a driving mechanism; a variable-speed mechanism, one end of which is drivingly connected to the driving mechanism, and the other end of which is drivingly connected to a wheel, the variable-speed mechanism being configured to change the rotating speed of the wheel; the variable-speed mechanism has a first working state, and the wheel is configured to have a first rotating speed when the variable-speed mechanism is in the first working state; and / or the variable-speed mechanism has a second working state, and the wheel is configured to have a second rotating speed when the variable-speed mechanism is in the second working state, the first rotating speed and the second rotating speed being different. By making the variable-speed mechanism have different working states, and the rotating speeds of the wheel corresponding to the different working states being different, the driving assembly has different rotating speeds, and under the condition that the power is fixed, the rotating speed and the torque are inversely proportional, so that the driving assembly can be simultaneously applied to application scenarios with high rotating speed and low torque and low rotating speed and high torque.

Description

Technical Field

[0001] This application relates to the field of drive technology, and more particularly to a drive assembly, drive system, axle, chassis and vehicle. Background Technology

[0002] In related technologies, the torque and speed of the four wheels of a four-wheel independent drive vehicle can be controlled independently and precisely, improving the vehicle's handling performance. However, with the development of the times, people have placed higher demands on automobiles. For example, for sports cars, people expect them to have good acceleration performance, good top speed performance, and even the ability to turn around on high-friction surfaces. But these demands are often difficult to meet simultaneously, and in related technologies, electric drive systems that only meet some of the above demands are usually large in size, presenting challenges such as difficult layout, heavy weight, and high cost. Summary of the Invention

[0003] This application provides a drive assembly, drive system, axle, chassis, and vehicle, which enable the drive assembly to have different rotational speeds, in order to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a drive assembly is provided, comprising:

[0005] Drive mechanism;

[0006] The transmission mechanism has one end connected to the drive mechanism and the other end connected to the wheel. The transmission mechanism is configured to change the speed of the wheel.

[0007] The transmission mechanism has a first operating state, and the wheel is configured to have a first rotational speed when the transmission mechanism is in the first operating state; and / or, the transmission mechanism has a second operating state, and the wheel is configured to have a second rotational speed when the transmission mechanism is in the second operating state, wherein the first rotational speed and the second rotational speed are different.

[0008] In some embodiments, the transmission mechanism includes:

[0009] A transmission mechanism, one end of which is connected to a drive mechanism and the other end of which is connected to a wheel, and having a first power transmission path and a second power transmission path, the transmission mechanism is configured to drive along the first power transmission path when the transmission mechanism is in a first working state, and / or drive along the second power transmission path when the transmission mechanism is in a second working state.

[0010] The shift mechanism, connected to the transmission mechanism, is configured to switch the power transmission path of the transmission mechanism to change the speed of the wheels.

[0011] In some embodiments, the transmission mechanism includes:

[0012] The first planetary mechanism is connected to the drive mechanism at one end and to the wheel at the other end. The first planetary mechanism includes a first planetary gear and a second planetary gear that are coaxially arranged and both connected to the drive mechanism, as well as a first gear ring that meshes with the first planetary gear and a second gear ring that meshes with the second planetary gear.

[0013] The shift mechanism is configured to selectively lock either the first or second gear ring to switch the power transmission path.

[0014] In some embodiments, the diameters of the first planetary gear and the second planetary gear are different.

[0015] In some embodiments, the shifting mechanism includes a first transmission mechanism, a second transmission mechanism, and a locking mechanism. The first transmission mechanism is drivenly connected to a first gear ring, and the second transmission mechanism is drivenly connected to a second gear ring. The locking mechanism is configured to lock the first transmission mechanism to lock the first gear ring, or to lock the second transmission mechanism to lock the second gear ring.

[0016] In some embodiments, the first transmission mechanism and the second transmission mechanism are coaxially arranged, and the locking mechanism is disposed between the first transmission mechanism and the second transmission mechanism and is configured to be connected to the first transmission mechanism to lock the first transmission mechanism, or connected to the second transmission mechanism to lock the second transmission mechanism.

[0017] In some embodiments, the first transmission mechanism includes:

[0018] The first connecting gear meshes with the outer teeth of the first gear ring;

[0019] The first engaging gear is coaxially arranged and fixedly connected to the first connecting gear;

[0020] The locking mechanism is configured to lock the first engaging gear to lock the first connecting gear, thereby locking the first gear ring.

[0021] In some embodiments, the second transmission mechanism includes:

[0022] The second connecting gear meshes with the outer teeth of the second gear ring;

[0023] The second engaging gear is coaxially arranged and fixedly connected to the second connecting gear;

[0024] The locking mechanism is configured to lock the second engaging gear to lock the second connecting gear, thereby locking the second gear ring.

[0025] In some embodiments, the locking mechanism includes a fixed central shaft and a synchronizer disposed on the central shaft;

[0026] Both the first and second transmission mechanisms are mounted on the central shaft. A synchronizer is located between the first and second transmission mechanisms and is configured to lock the first transmission mechanism so that the first gear ring is in a locked state; or, to lock the second transmission mechanism so that the second gear ring is in a locked state.

[0027] In some embodiments, the synchronizer includes:

[0028] Synchronous gear hub, fixedly connected to the central shaft;

[0029] A sliding toothed sleeve is fitted onto a synchronous toothed hub and is configured to connect with a first transmission mechanism to lock the first transmission mechanism, or to connect with a second transmission mechanism to lock the second transmission mechanism.

[0030] In some embodiments, the shifting mechanism is located on the outer side of the first planetary mechanism along its radial direction.

[0031] In some embodiments, the shift mechanism is also configured to release the first and second gear rings to put the drive assembly in neutral.

[0032] In some embodiments, the shifting mechanism includes: a first locking component for locking a first gear ring; and a second locking component for locking a second gear ring.

[0033] In some embodiments, the first locking component and the second locking component are located on opposite sides of the first planetary mechanism along its radial direction.

[0034] In some embodiments, the first locking component is a brake, the brake having a first rotating member kinetically connected to the first gear ring, and a first fixing member fixedly disposed thereon, the brake being configured to lock the first gear ring when the first fixing member contacts the first rotating member; and / or,

[0035] The second locking component is a brake, which has a second rotating member that is drivenly connected to the second gear ring, and a second fixing member that is fixedly disposed. The brake is configured to lock the second gear ring when the second fixing member contacts the second rotating member.

[0036] In some embodiments, the first planetary mechanism further includes a first sun gear, the first planet gear meshes with the first sun gear and is connected to the drive mechanism via the first sun gear, the first planet gear is fixedly connected to a second planet gear, and the second planet gear is connected to the drive mechanism via the first planet gear and the first sun gear.

[0037] In some embodiments, the first planetary mechanism further includes a first shaft and a first planet carrier, with the first planetary gear and the second planetary gear both mounted on the first shaft. The first shaft is fixedly connected to the first planet carrier, and the first planet carrier is driven to the wheel.

[0038] In some embodiments, this is applied to a vehicle, which has a first gear and a second gear. The first operating state and the second operating state of the transmission mechanism correspond to the first gear and the second gear, respectively, and the speed ratios of the first gear and the second gear are i1 and i2, respectively.

[0039] The gear ratio of the first gear is i1 = k1 + 1, k1 = |n S |=(Z R1 / Z g1 )*(Z g2 / Z S )=(Z R1 / Z S ), where Z R1 Z represents the number of teeth on the first planetary gear. S This represents the number of teeth on the first sun gear.

[0040] The speed ratio of the second gear is i2 = k2 + 1, k2 = |n S |=(Z R2 / Z g2 )*(Z g1 / Z S ), where Z R2 Z represents the number of teeth on the second planetary gear. S This represents the number of teeth on the first sun gear.

[0041] In some embodiments, the transmission mechanism further includes a second planetary mechanism that is drive-connected between the first planetary carrier and the wheel and is configured to regulate the output speed of the drive assembly.

[0042] In some embodiments, the drive mechanism has a motor output shaft that is driven to a first sun gear of a first planetary mechanism. The first planetary mechanism has a first output shaft that is driven to a second sun gear of a second planetary mechanism. The second planetary mechanism has a second output shaft that is driven to a wheel. The motor output shaft, the first output shaft, and the second output shaft are coaxially arranged.

[0043] According to a second aspect of this application, a drive system is provided, comprising at least two drive assemblies as described above, wherein the at least two drive assemblies are symmetrically arranged.

[0044] According to a third aspect of this application, an axle is provided, including the drive system described above.

[0045] According to a fourth aspect of this application, a chassis is provided, including the axle described above.

[0046] According to a fifth aspect of this application, a vehicle is also provided, including the chassis described above.

[0047] In the drive assembly of this application embodiment, by enabling the transmission mechanism to have different working states, and the wheel speeds corresponding to the different working states are different, the drive assembly provided by this application has different speeds. Under the condition of fixed power, the speed and torque are inversely proportional, so that the drive assembly provided by this application can be applied to application scenarios with both high speed and low torque and low speed and high torque requirements.

[0048] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments 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.

[0050] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0051] Figure 1 This is a schematic diagram of the drive assembly provided in the embodiments of this application;

[0052] Figure 2 This is a schematic diagram of another drive assembly provided in an embodiment of this application;

[0053] Figure 3 This is a schematic diagram of another drive assembly provided in the embodiments of this application;

[0054] Figure 4 This is a schematic diagram of the structure of a drive system provided in an embodiment of this application;

[0055] Figure 5 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application.

[0056] Explanation of reference numerals in the attached figures:

[0057] 100. Drive assembly;

[0058] 10. Drive mechanism; 11. Motor output shaft;

[0059] 20. Transmission mechanism;

[0060] 30. Transmission mechanism;

[0061] 40. Gear shifting mechanism; 41. First transmission mechanism; 411. First connecting gear; 412. First engaging gear; 42. Second transmission mechanism; 421. Second connecting gear; 422. Second engaging gear; 43. Locking mechanism; 431. Central shaft; 432. Synchronizer; 432a. Synchronizing gear hub; 432b. Sliding gear sleeve; 44. First locking assembly; 441. First rotating member; 442. First fixing member; 45. Second locking assembly; 451. Second rotating member; 452. Second fixing member;

[0062] 50. First planetary mechanism; 51. First planetary gear; 52. Second planetary gear; 53. First gear ring; 54. Second gear ring; 55. First sun gear; 56. First shaft; 57. First planetary carrier; 58. First output shaft;

[0063] 60. Second planetary mechanism; 61. Second sun gear; 62. Second output shaft;

[0064] 70. Wheel. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0066] According to a first aspect of this application, a drive assembly 100 is provided; see [link to relevant documentation]. Figure 1 , Figure 1 This is a schematic diagram of the drive assembly provided in an embodiment of this application. The drive assembly 100 provided in this application includes: a drive mechanism 10; a transmission mechanism 20, one end of which is connected to the drive mechanism 10 and the other end of which is connected to a wheel 70. The transmission mechanism 20 is configured to change the rotational speed of the wheel 70. The transmission mechanism 20 has a first operating state, and the wheel 70 is configured to have a first rotational speed when the transmission mechanism 20 is in the first operating state; and / or, the transmission mechanism 20 has a second operating state, and the wheel 70 is configured to have a second rotational speed when the transmission mechanism 20 is in the second operating state, wherein the first rotational speed and the second rotational speed are different.

[0067] In this embodiment, by making the transmission mechanism 20 have different working states, and the rotational speed of the wheel 70 corresponding to the different working states is different, the drive assembly 100 provided by this application has different rotational speeds. Under the condition of fixed power, the rotational speed and torque are inversely proportional, so that the drive assembly 100 provided by this application can be applied to application scenarios with high speed and low torque and low speed and high torque requirements at the same time.

[0068] In some embodiments of this application, the transmission mechanism 20 includes: a transmission mechanism 30, one end of which is connected to the drive mechanism 10 and the other end of which is connected to the wheel 70, and having a first power transmission path and a second power transmission path. The transmission mechanism 30 is configured to drive along the first power transmission path when the transmission mechanism 20 is in a first working state, and / or to drive along the second power transmission path when the transmission mechanism 20 is in a second working state; and a shifting mechanism 40, connected to the transmission mechanism 30, configured to switch the power transmission path of the transmission mechanism 30 to change the rotational speed of the wheel 70.

[0069] This approach allows for dynamic selection of the power transmission path based on demand, optimizing the efficiency of the drive assembly 100 and enabling it to adapt to complex operating conditions, thus improving the overall performance of the vehicle.

[0070] In some embodiments of this application, the transmission mechanism 30 includes: a first planetary mechanism 50, one end of which is connected to the drive mechanism 10 and the other end of which is connected to the wheel 70. The first planetary mechanism 50 includes a first planetary gear 51 and a second planetary gear 52 that are coaxially arranged and both connected to the drive mechanism 10, a first gear ring 53 that meshes with the first planetary gear 51, and a second gear ring 54 that meshes with the second planetary gear 52; and a shifting mechanism 40 configured to selectively lock the first gear ring 53 or the second gear ring 54 to achieve shifting.

[0071] In this embodiment, by including a first planetary gear 51 and a second planetary gear 52 coaxially arranged in the first planetary mechanism 50, two power transmission paths are available when locking the first ring gear 53 or the second ring gear 54 using the shift mechanism 40. Simultaneously, the coaxial arrangement of the first planetary gear 51 and the second planetary gear 52 simplifies the structure of the first planetary mechanism 50, thereby reducing the space occupied by the first planetary mechanism 50. Furthermore, using a single shift mechanism 40 to switch between the two power transmission paths further simplifies the structure of the drive assembly 100, further reducing the space occupied by the drive assembly 100, thus mitigating the problem of the large size of the electric drive system.

[0072] In some embodiments of this application, the diameters of the first planetary gear 51 and the second planetary gear 52 are different. This results in different final output speeds for the two power transmission paths, thereby meeting the requirements for high speed and high torque.

[0073] In some embodiments of this application, the first planetary mechanism 50 further includes a first sun gear 55, the diameter of the first planet gear 51 is larger than the diameter of the second planet gear 52, and the first sun gear 55 meshes with the first planet gear 51.

[0074] Please continue reading. Figure 1In some embodiments of this application, the shifting mechanism 40 includes a first transmission mechanism 41, a second transmission mechanism 42, and a locking mechanism 43. The first transmission mechanism 41 is connected to the first gear ring 53, and the second transmission mechanism 42 is connected to the second gear ring 54. The locking mechanism 43 is configured to lock the first transmission mechanism 41 so that the first gear ring 53 is in a locked state, or to lock the second transmission mechanism 42 so that the second gear ring 54 is in a locked state.

[0075] In this embodiment, the shifting mechanism 40 includes a locking mechanism 43, which can be connected to either the first transmission mechanism 41 or the second transmission mechanism 42 to lock either the first transmission mechanism 41 or the second transmission mechanism 42, thereby locking the first gear ring 53 or the second gear ring 54. Using only one locking mechanism 43 allows for switching between two gears, simplifying the structure of the drive assembly 100 and helping to reduce the space occupied by the drive assembly 100.

[0076] In some embodiments of this application, the first transmission mechanism 41 and the second transmission mechanism 42 are coaxially arranged, and the locking mechanism 43 is disposed between the first transmission mechanism 41 and the second transmission mechanism 42 and is configured to be connected to the first transmission mechanism 41 to lock the first transmission mechanism 41, or connected to the second transmission mechanism 42 to lock the second transmission mechanism 42.

[0077] In this embodiment, by positioning the locking mechanism 43 between the first transmission mechanism 41 and the second transmission mechanism 42, the locking mechanism 43 can be connected to either the first transmission mechanism 41 or the second transmission mechanism 42 according to actual usage requirements. Furthermore, the locking mechanism 43 is located close to both the first transmission mechanism 41 and the second transmission mechanism 42, which allows for a quick response to gear selection requests, reduces the time required for gear switching, and improves the user experience.

[0078] Please continue reading. Figure 1 In some embodiments of this application, the first transmission mechanism 41 includes: a first connecting gear 411 that meshes with the external teeth of the first gear ring 53; a first engaging gear 412 that is coaxially arranged and fixedly connected to the first connecting gear 411; and a locking mechanism 43 configured to lock the first engaging gear 412 to lock the first connecting gear 411, so that the first gear ring 53 is in a locked state.

[0079] This design allows the locking mechanism 43 to lock the first engaging gear 412 indirectly, which in turn locks the first connecting gear 411. Furthermore, the coaxiality of the first connecting gear 411 and the first engaging gear 412 shortens the response time.

[0080] Please continue reading. Figure 1In some embodiments of this application, the second transmission mechanism 42 includes: a second connecting gear 421 that meshes with the external teeth of the second gear ring 54; a second engaging gear 422 that is coaxially arranged and fixedly connected to the second connecting gear 421; and a locking mechanism 43 configured to lock the second engaging gear 422 to lock the second connecting gear 421, thereby placing the second gear ring 54 in a locked state. The technical effects are similar to or the same as those of the embodiments described above where the first transmission mechanism 41 includes a first connecting gear 411 and a first engaging gear 412, and will not be repeated here.

[0081] Please continue reading. Figure 1 In some embodiments of this application, the locking mechanism 43 includes a fixedly disposed central shaft 431 and a synchronizer 432 disposed on the central shaft 431; the first transmission mechanism 41 and the second transmission mechanism 42 are both sleeved on the central shaft 431, the synchronizer 432 is disposed between the first transmission mechanism 41 and the second transmission mechanism 42, and is configured to lock the first transmission mechanism 41 so that the first gear ring 53 is in a locked state; or, lock the second transmission mechanism 42 so that the second gear ring 54 is in a locked state.

[0082] In this embodiment, the central shaft 431 is fixedly installed, and the synchronizer 432 included in the locking mechanism 43 is installed on the central shaft 431. Therefore, when the first locking mechanism 43 is connected to the synchronizer 432, the first gear ring 53 connected to the first transmission mechanism 41 can be locked.

[0083] In this embodiment, both the first transmission mechanism 41 and the second transmission mechanism 42 are mounted on the central shaft 431, allowing the locking mechanism 43 to connect with the second transmission mechanism 42 but not with the first transmission mechanism 41. When the locking mechanism 43 is not connected to the first transmission mechanism 41, the first transmission mechanism 41 can rotate freely around the central shaft 431, preventing any adverse effect of the first transmission mechanism 43 on the rotation of the second planetary gear 52. The technical effect of the locking mechanism 43 being connected to the first transmission mechanism 41 but not to the second transmission mechanism 42 is similar to or the same as the technical effect of the embodiment described above where the locking mechanism 43 is connected to the second transmission mechanism 42 but not to the first transmission mechanism 41, and will not be repeated here.

[0084] Please continue reading. Figure 1 In some embodiments of this application, the synchronizer 432 includes: a synchronizer hub 432a, which is fixedly connected to the central shaft 431; and a sliding sleeve 432b, which is sleeved on the synchronizer hub 432a and configured to be connected to the first transmission mechanism 41 to lock the first transmission mechanism 41, or connected to the second transmission mechanism 42 to lock the second transmission mechanism 42.

[0085] This design leverages the smooth connection between the synchronizing gear hub 432a and the sliding gear sleeve 432b to achieve rapid gear shifting. Furthermore, the synchronizing gear hub 432a and the sliding gear sleeve 432b have a simple structure and are easy to connect.

[0086] In some embodiments of this application, the shift mechanism 40 is disposed radially outside the first planetary mechanism 50. This reduces the axial dimension of the drive assembly 100, thereby reducing the axial space occupied by the drive assembly 100.

[0087] In some embodiments of this application, the shift mechanism 40 is further configured to release the first gear ring 53 and the second gear ring 54 to put the drive assembly 100 in neutral.

[0088] In this embodiment, when the shift mechanism 40 is in the position of releasing the first gear ring 53 and the second gear ring 54, both the first gear ring 53 and the second gear ring 54 are in an unlocked state, so that the drive assembly 100 is in neutral. At this time, the wheel 70 connected to the first planetary mechanism 50 is disconnected from the drive mechanism 10, which helps to reduce the drag torque.

[0089] Please see Figure 2 , Figure 2 This is a schematic diagram of another drive assembly 100 provided in an embodiment of this application. In some embodiments of this application, the shifting mechanism 40 includes: a first locking component 44 for locking the first gear ring 53; and a second locking component 45 for locking the connection of the second gear ring 54.

[0090] In this embodiment of the application, by connecting the first locking component 44 of the shift mechanism 40 to the first gear ring 53 and the second locking component 45 to the second gear ring 54, the state of the two gear rings can be independently controlled, so that when either the first locking component 44 or the second locking component 45 fails, the other locking component can still work normally, reducing the possibility of failure of the drive assembly 100 provided in this application.

[0091] In some embodiments of this application, the first locking component 44 and the second locking component 45 are located on opposite sides of the first planetary mechanism 50 along its radial direction. This ensures that the first gear ring 53 and the second gear ring 54 can be locked while also reducing the space occupied by the drive assembly 100.

[0092] In some embodiments of this application, the first locking component 44 is a brake, which has a first rotating member 441 that is pulvinctly connected to the first gear ring 53, and a first fixing member 442 that is fixedly disposed. The brake is configured such that when the first fixing member 442 contacts the first rotating member 441, the first gear ring 53 is in a locked state.

[0093] This approach allows for control of the connection between the first rotating member 441 and the first fixed member 442 as needed, thereby controlling the state of the first gear ring 53.

[0094] In some embodiments of this application, the second locking component 45 is a brake. The brake has a second rotating member 451 that is pulvinctly connected to the second gear ring 54, and a second fixing member 452 that is fixedly disposed. The brake is configured such that when the second fixing member 452 contacts the second rotating member 451, the second gear ring 54 is in a locked state. The technical effects are similar to or the same as those of the embodiments where the first locking component 44 is a brake, and will not be described again here.

[0095] In some embodiments of this application, the first planetary mechanism 50 further includes a first sun gear 55, a first planet gear 51 meshing with the first sun gear 55 and being connected to the drive mechanism 10 via the first sun gear 55, a first planet gear 51 being fixedly connected to a second planet gear 52, and a second planet gear 52 being connected to the drive mechanism 10 via the first planet gear 51 and the first sun gear 55.

[0096] With this approach, the power of the first planetary mechanism 50 is output from the first planetary carrier 57. Compared with the approach where the power is output from the ring gear, the approach where the power is output from the first planetary carrier 57 provided by this application not only helps to reduce the size of the first planetary mechanism 50, but also enables the output of higher speeds.

[0097] Please continue reading. Figure 1 In some embodiments of this application, the first planetary mechanism 50 further includes a first shaft 56 and a first planet carrier 57, with the first planetary gear 51 and the second planetary gear 52 both sleeved on the first shaft 56, and the first shaft 56 fixedly connected to the first planet carrier 57.

[0098] In some embodiments of this application, the drive assembly 100 provided in this application is applied to a vehicle, the vehicle having a first gear and a second gear. The first and second operating states of the transmission mechanism 20 correspond to the first and second gears of the vehicle, respectively. The gear ratios of the first and second gears are i1 and i2, respectively, and the gear ratio of the first gear is i1 = k1 + 1. Among them, Z R1 Z represents the number of teeth on the first planetary gear 51. S This represents the number of teeth on the first sun gear (55). The gear ratio for the second gear is i2 = k2 + 1, where k2 = |n S |=(Z R2 / Z g2 )*(Z g1 / Z S ), where Z R2 Z represents the number of teeth on the second planetary gear 52. S This refers to the number of teeth on the first sun gear, which is 55.

[0099] Please see Figure 3 , Figure 3 This is a schematic diagram of another drive assembly 100 provided in the embodiments of this application. In some embodiments of this application, the transmission mechanism 30 further includes a second planetary mechanism 60, which is drively connected between the first planetary carrier 57 and the wheel 70 and is configured to adjust the output speed of the drive assembly 100.

[0100] This approach allows for further adjustment of the output speed of the drive assembly 100 according to actual needs. For example, the second planetary mechanism 60 can be used to increase the output speed of the drive assembly 100, making the drive assembly 100 provided in this application applicable to more scenarios.

[0101] Please continue reading. Figure 3 In some embodiments of this application, the drive mechanism 10 has a motor output shaft 11, which is connected to the first sun gear 55 of the first planetary mechanism 50. The first planetary mechanism 50 has a first output shaft 58, which is connected to the second sun gear 61 of the second planetary mechanism 60. The second planetary mechanism 60 has a second output shaft 62, which is connected to the wheel 70. The motor output shaft 11, the first output shaft 58, and the second output shaft 62 are coaxially arranged. This helps to shorten the power transmission route, thereby improving power transmission efficiency and reducing power transmission losses.

[0102] According to a second aspect of this application, a drive system is provided; please refer to [reference needed]. Figure 4 , Figure 4 This is a schematic diagram of a drive system provided in an embodiment of this application. The drive system includes at least two drive assemblies 100 as described in the first aspect, and the at least two drive assemblies 100 are symmetrically arranged. This helps to reduce the axial dimension of the drive system.

[0103] According to a third aspect of this application, an axle is provided, including the drive system described above. This axle possesses all the beneficial effects of the aforementioned drive system, which will not be elaborated further herein.

[0104] According to a fourth aspect of this application, a chassis is provided, including the axle described above. This chassis possesses all the beneficial effects of the aforementioned axle, which will not be elaborated further herein.

[0105] According to the fifth aspect of this application, a vehicle is also provided, please refer to... Figure 5 , Figure 5 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle includes the chassis described above. This vehicle has all the beneficial effects of the chassis described above, which will not be repeated here.

[0106] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions.

[0107] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0108] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0109] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0110] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A drive assembly, characterized in that, include: Drive mechanism; A transmission mechanism, one end of which is connected to the drive mechanism and the other end of which is connected to the wheel, is configured to change the rotational speed of the wheel. The transmission mechanism has a first operating state, and the wheel is configured to have a first rotational speed when the transmission mechanism is in the first operating state; and / or, the transmission mechanism has a second operating state, and the wheel is configured to have a second rotational speed when the transmission mechanism is in the second operating state, wherein the first rotational speed and the second rotational speed are different.

2. The drive assembly according to claim 1, characterized in that, The speed-changing mechanism includes: A transmission mechanism, one end of which is connected to the drive mechanism and the other end of which is connected to the wheel, and having a first power transmission path and a second power transmission path, wherein the transmission mechanism is configured to drive along the first power transmission path when the transmission mechanism is in the first working state, and / or drive along the second power transmission path when the transmission mechanism is in the second working state. A shifting mechanism, connected to the transmission mechanism, is configured to switch the power transmission path of the transmission mechanism to change the rotational speed of the wheels.

3. The drive assembly according to claim 2, characterized in that, The transmission mechanism includes: The first planetary mechanism is driven to the drive mechanism at one end and driven to the wheel at the other end. The first planetary mechanism includes a first planetary gear and a second planetary gear that are coaxially arranged and driven to the drive mechanism, as well as a first gear ring that meshes with the first planetary gear and a second gear ring that meshes with the second planetary gear. The shifting mechanism is configured to selectively lock either the first gear ring or the second gear ring to achieve the switching of the power transmission path.

4. The drive assembly according to claim 3, characterized in that, The first planetary gear and the second planetary gear have different diameters.

5. The drive assembly according to claim 3, characterized in that, The shifting mechanism includes a first transmission mechanism, a second transmission mechanism, and a locking mechanism. The first transmission mechanism is drivenly connected to the first gear ring, and the second transmission mechanism is drivenly connected to the second gear ring. The locking mechanism is configured to lock the first transmission mechanism to lock the first gear ring, or to lock the second transmission mechanism to lock the second gear ring.

6. The drive assembly according to claim 5, characterized in that, The first transmission mechanism and the second transmission mechanism are coaxially arranged. The locking mechanism is disposed between the first transmission mechanism and the second transmission mechanism and is configured to be connected to the first transmission mechanism to lock the first transmission mechanism, or connected to the second transmission mechanism to lock the second transmission mechanism.

7. The drive assembly according to claim 6, characterized in that, The first transmission mechanism includes: The first connecting gear meshes with the outer teeth of the first gear ring; The first engaging gear is coaxially arranged and fixedly connected to the first connecting gear; The locking mechanism is configured to lock the first engaging gear to lock the first connecting gear, such that the first gear ring is in the locked state.

8. The drive assembly according to claim 6, characterized in that, The second transmission mechanism includes: The second connecting gear meshes with the outer teeth of the second gear ring; The second engaging gear is coaxially arranged and fixedly connected to the second connecting gear; The locking mechanism is configured to lock the second engaging gear to lock the second connecting gear, such that the second gear ring is in the locked state.

9. The drive assembly according to any one of claims 5 to 8, characterized in that, The locking mechanism includes a fixedly mounted central shaft and a synchronizer mounted on the central shaft; Both the first transmission mechanism and the second transmission mechanism are sleeved on the central shaft. The synchronizer is disposed between the first transmission mechanism and the second transmission mechanism and is configured to lock the first transmission mechanism so that the first gear ring is in a locked state. Alternatively, the second transmission mechanism can be locked to lock the second gear ring.

10. The drive assembly according to claim 9, characterized in that, The synchronizer includes: A synchronous gear hub is fixedly connected to the central shaft; A sliding toothed sleeve is fitted onto the synchronous toothed hub and is configured to connect with the first transmission mechanism to lock the first transmission mechanism, or to connect with the second transmission mechanism to lock the second transmission mechanism.

11. The drive assembly according to any one of claims 5 to 8, characterized in that, The shifting mechanism is located on the outer side of the first planetary mechanism along its radial direction.

12. The drive assembly according to claim 3, characterized in that, The shifting mechanism is also configured to release the first gear ring and the second gear ring to put the drive assembly in neutral.

13. The drive assembly according to claim 12, characterized in that, The shifting mechanism includes: a first locking component for locking the first gear ring; and a second locking component for locking the second gear ring.

14. The drive assembly according to claim 13, characterized in that, The first locking component and the second locking component are located on opposite sides of the first planetary mechanism along its radial direction.

15. The drive assembly according to claim 14, characterized in that, The first locking component is a brake, which has a first rotating member that is kinetically connected to the first gear ring and a first fixing member that is fixedly disposed thereon. The brake is configured such that when the first fixing member contacts the first rotating member, the first gear ring is in a locked state. And / or, The second locking component is a brake, which has a second rotating member that is kinetically connected to the second gear ring, and a second fixing member that is fixedly disposed thereon. The brake is configured to lock the second gear ring when the second fixing member contacts the second rotating member.

16. The drive assembly according to claim 3, characterized in that, The first planetary mechanism further includes a first sun gear, the first planet gear meshes with the first sun gear and is connected to the drive mechanism via the first sun gear, the first planet gear is fixedly connected to a second planet gear, and the second planet gear is connected to the drive mechanism via the first planet gear and the first sun gear.

17. The drive assembly according to claim 16, characterized in that, The first planetary mechanism further includes a first shaft and a first planetary carrier. The first planetary gear and the second planetary gear are both mounted on the first shaft. The first shaft is fixedly connected to the first planetary carrier, and the first planetary carrier is drivenly connected to the wheel.

18. The drive assembly according to claim 17, characterized in that, Applied to a vehicle, the vehicle has a first gear and a second gear, the first working state and the second working state of the transmission mechanism correspond to the first gear and the second gear respectively, and the speed ratios of the first gear and the second gear are i1 and i2 respectively; The speed ratio of the first gear is i1 = k1 + 1, k1 = |n S |=(Z R1 / Z g1 )*(Z g2 / Z S )=(Z R1 / Z S ), where Z R1 Z represents the number of teeth on the first planetary gear. S The number of teeth on the first sun gear; The speed ratio of the second gear is i2 = k2 + 1, k2 = |n S |=(Z R2 / Z g2 )*(Z g1 / Z S ), where Z R2 Z represents the number of teeth on the second planetary gear. S The number of teeth on the first sun gear is denoted as .

19. The drive assembly according to claim 17, characterized in that, The transmission mechanism further includes a second planetary mechanism, which is drive-connected between the first planetary carrier and the wheel, and is configured to adjust the output speed of the drive assembly.

20. The drive assembly according to claim 19, characterized in that, The drive mechanism has a motor output shaft, which is driven to the first sun gear of the first planetary mechanism. The first planetary mechanism has a first output shaft, which is driven to the second sun gear of the second planetary mechanism. The second planetary mechanism has a second output shaft, which is driven to the wheel. The motor output shaft, the first output shaft, and the second output shaft are coaxially arranged.

21. A drive system, characterized in that, It includes at least two drive assemblies as described in any one of claims 1 to 20, wherein the at least two drive assemblies are symmetrically arranged.

22. An axle, characterized in that, Includes the drive system as described in claim 21.

23. A chassis, characterized in that, Including the axle as described in claim 22.

24. A vehicle, characterized in that, Includes the chassis as described in claim 23.

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