Speed adjusting device, power system and vehicle

Abstract

The utility model provides a speed adjusting device, a power system and a vehicle, the speed adjusting device comprises a first half shaft and a second half shaft, a planet carrier of a planetary gear train is connected with the first half shaft, a sun gear is arranged on the second half shaft, and a gear ring is connected with a hollow shaft; a plurality of gear pairs are arranged between the hollow shaft and the intermediate shaft, first synchronizers corresponding to the gear pairs are arranged on the hollow shaft or the intermediate shaft, and the first synchronizers select the corresponding gear pairs so that the hollow shaft can be in transmission connection with the intermediate shaft; the gear shifting assembly comprises a first meshing gear, a second synchronizer and a second meshing gear, the second synchronizer is selectively connected with the first meshing gear, and the second synchronizer is selectively connected with the second meshing gear; the intermediate shaft is in transmission connection with the output shaft. The speed adjusting device is more compact in overall structure, small in occupied space and beneficial to improving the driving experience feeling.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power systems, and particularly relates to a speed adjustment device. At the same time, the utility model also relates to a power system provided with the above speed conversion device, and a vehicle provided with the power system. Background Technique

[0002] The power drive mechanism on a vehicle refers to the mechanism that provides power for the vehicle, mainly consisting of two major parts: a power source system and a transmission system. Among them, the main function of the transmission is to change the transmission ratio, thereby adjusting the driving speed of the vehicle and the torque on the driving wheels. When the vehicle is driving in different environments or road conditions, the transmission adjusts the transmission ratio to meet the engine's demand for different traction forces, so that the engine can maintain the best working state. This not only improves the driving performance of the vehicle but also extends the service life of the engine.

[0003] In the existing vehicle power system, in order to improve the load-bearing capacity and make the transmission more stable, a planetary gear train is also added in the transmission for power transmission. However, the overall structure of the existing transmission is relatively large, occupies a large space, is not convenient to be arranged on the vehicle, has fewer achievable gear modes, and the driving experience is poor. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose a speed adjustment device to make its overall structure more compact, occupy less space, and have more gear modes, which is beneficial to improving the driving experience.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A speed adjustment device includes an input shaft, a planetary gear train, an intermediate shaft, an output shaft, and a shifting component;

[0007] The input shaft includes a first half shaft and a second half shaft. The planet carrier of the planetary gear train is connected to the first half shaft. The sun gear of the planetary gear train is arranged on the second half shaft. A hollow shaft is connected to the ring gear of the planetary gear train, and the hollow shaft is sleeved on the second half shaft in a non-fixed manner;

[0008] A plurality of gear pairs are provided between the hollow shaft and the intermediate shaft. A first synchronizer corresponding to each gear pair is arranged on the hollow shaft or the intermediate shaft. The first synchronizer selects the corresponding gear pair to enable the hollow shaft and the intermediate shaft to be in transmission connection;

[0009] The shifting assembly includes a first meshing gear disposed on the hollow shaft, a second synchronizer disposed on the second half shaft, and a second meshing gear sleeved on the second half shaft. The second meshing gear is disposed on the housing of the speed regulating device. The second synchronizer can selectively connect the first meshing gear, and the second synchronizer can selectively connect the second meshing gear;

[0010] The intermediate shaft and the output shaft are in transmission connection.

[0011] Further, two sets of the gear pairs are arranged at intervals along the axial direction of the input shaft. Each gear pair includes a first driving gear sleeved on the hollow shaft and a first driven gear fixed on the intermediate shaft. The first driving gear and the first driven gear are meshed and connected;

[0012] The first synchronizer is disposed on the hollow shaft and is located between the two first driving gears. The first synchronizer can selectively connect any one of the first driving gears.

[0013] Further, a second driving gear is disposed on the intermediate shaft, and a second driven gear is disposed on the output shaft. The second driving gear and the second driven gear are meshed and connected;

[0014] The second driving gear is arranged away from the first half shaft relative to the gear pair.

[0015] Further, an output gear is disposed on the output shaft. The output gear is used for meshing and connecting with the input gear ring of the differential.

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] The speed regulating device described in the present utility model can be used as a power transmission mechanism of a transmission. The speed regulating device divides the input shaft into a first half shaft and a second half shaft, which is convenient for the arrangement of the planetary gear train. The power on the planetary gear train is transmitted from the hollow shaft on the second half shaft to the output shaft through a plurality of gear pairs, making the overall arrangement more convenient, the overall structure compact, and the occupied space small. It is more convenient to be arranged on a vehicle, has more gear modes, and provides a wider selection range for the driver.

[0018] By setting the first meshing gear and the second meshing gear, when the second synchronizer engages the first meshing gear, the sun gear and the ring gear can rotate synchronously. When the second synchronizer engages the second meshing gear, the sun gear can be braked to make the rotational speed of the sun gear 0. When the power is transmitted from the first half shaft to the second half shaft through the planetary gear train, two gears can be realized, which is beneficial to increasing the gear modes of the power transmission assembly.

[0019] When the speed regulating device is used to transmit power in the transmission, since there are multiple gear pairs between the hollow shaft and the intermediate shaft, the output speed can be adjusted by controlling the corresponding gear pairs selected by each first synchronizer, and then it can be applied to the gear shift in the transmission. At the same time, by controlling the second synchronizer to selectively connect the first meshing gear or the second meshing gear, the output speed can be adjusted conveniently, and the gear shift can also be achieved when it is applied to the transmission, and the gear shift is convenient. The transmission of the speed regulating device is applied to vehicles, which is conducive to improving the power transmission efficiency. The large number of gears makes it convenient for the driver to choose, which is conducive to increasing driving comfort.

[0020] Secondly, each gear pair includes a first driving gear and a first driven gear, and the first synchronizer is arranged on the hollow shaft. When the first synchronizer is disconnected from the first driving gear, the power between the hollow shaft and the output shaft is interrupted, and the two do not affect each other. When multiple power sources are arranged, it is convenient to realize multiple driving modes. When the first synchronizer is engaged with the first driving gear, the power on the hollow shaft can be transmitted to the output shaft through the first driving gear and the first driven gear. When multiple power sources are arranged, the multiple power sources can jointly drive the vehicle to travel, thereby improving the power performance of the vehicle.

[0021] Furthermore, a second driving gear and a second driven gear are arranged on the intermediate shaft, so that the power transmitted to the intermediate shaft is continuously transmitted to the output shaft, which has a simple structure and low cost. The second driving gear is arranged away from the first half shaft relative to the gear pair, which is convenient for overall arrangement. An output gear is arranged on the output shaft, so that the power transmitted to the output shaft in each gear can be transmitted outwardly through the output gear, which is convenient for overall arrangement.

[0022] In addition, another object of the present invention is to provide a power system, comprising the speed regulating device as described above, and also comprising a power source, wherein the power source is drivingly connected to the speed regulating device.

[0023] Furthermore, the power source includes an engine, and a power output end of the engine is connected to the first half shaft.

[0024] Furthermore, it also includes a first motor, and a power output end of the first motor is drivingly connected to the output shaft.

[0025] Furthermore, the motor shaft of the first motor is a hollow structure, and the motor shaft of the first motor is sleeved on the output shaft;

[0026] A third driving gear is provided on the motor shaft, a third driven gear is sleeved on the intermediate shaft, the third driving gear and the third driven gear are meshed and connected, a third synchronizer is provided on the intermediate shaft, and the third synchronizer selectively connects the third driven gear; or, a third driving gear is provided on the motor shaft, a third driven gear is provided on the intermediate shaft, and the third driving gear and the third driven gear are meshed and connected.

[0027] Further, a second motor is further included, a power output shaft of the second motor is in transmission connection with the second half shaft, and the engine and the second motor are respectively arranged at two ends of the input shaft.

[0028] For the power system of the present utility model, by applying the speed regulating device as above, on the basis of a compact structure and a small occupied space, it is convenient to realize multiple gears, the gear shifting is smooth, it is convenient to be arranged on the vehicle, and the driving comfort of the driver will be increased.

[0029] The power source includes an engine, and there are two connection methods including directly connecting the power output end of the engine to the first half shaft and arranging a clutch between the power output end of the engine and the first half shaft. Directly connecting the first half shaft and the power output end of the engine can directly transmit the power of the engine to the first half shaft. This structure without a clutch has the beneficial effects of better weight reduction and cost reduction. And arranging a clutch between the first half shaft and the power output end of the engine enables the power between the first half shaft and the power output end of the engine to be engaged or disengaged as needed, which is convenient for gear shifting when disengaged.

[0030] In addition, the provided first motor enables the power output end of the first motor to be in transmission connection with the output shaft, which is convenient for realizing a hybrid drive mode in cooperation with the engine. The motor shaft of the first motor is sleeved on the output shaft, which is convenient for saving layout space. When the third synchronizer is disconnected from the third driven gear, the engine charges the first motor, and when the first motor is used as the starting motor of the engine, it is not necessary to reverse-drag the first motor, which is beneficial for saving energy. When the third synchronizer is engaged with the third driven gear, the first motor can cooperate with the engine and / or the second motor to increase the power performance of the vehicle. When the first synchronizer is disconnected from the first driving gear, by engaging the third synchronizer with the third driven gear, the first motor can output power alone, so that the power transmission assembly has a pure electric drive mode.

[0031] Moreover, a second motor is provided, and the power output end of the second motor is connected to the second half shaft, forming a structure in which the power output end of the second motor is drivingly connected to the sun gear, so that the power of the second motor can be transmitted to the hollow shaft through the sun gear, thereby facilitating the output of power and facilitating the driving of the vehicle by the second motor. The engine and the second motor are respectively disposed at both ends of the input shaft, which facilitates the realization of modes such as series connection, power splitting, and direct drive. The engine can work to charge the second motor, which is beneficial to energy conservation. The second motor can also be used as a starting motor for the engine, eliminating the need for a separately matched starting motor for the engine, saving costs. At the same time, the engine and the second motor can also jointly output power, so that the power transmission assembly has a hybrid drive mode.

[0032] In addition, another object of the present invention is to provide a vehicle, on which the above-mentioned power system and a third motor are provided. The power system is drivingly connected to one of the drive axles of the vehicle, and the third motor is drivingly connected to the other drive axle of the vehicle.

[0033] The vehicle according to the present invention has the same beneficial effects as the above-mentioned power system, and will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings that form a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0035] Figure 1 is a schematic structural diagram of the speed adjustment device according to Embodiment 1 of the present invention;

[0036] Figure 2 is a schematic structural diagram of the speed adjustment device according to Embodiment 1 of the present invention provided with a clutch;

[0037] Figure 3 is a schematic structural diagram of the speed adjustment device according to Embodiment 1 of the present invention omitting the first motor;

[0038] Figure 4 is a schematic structural diagram of the speed adjustment device according to Embodiment 1 of the present invention provided with a third synchronizer.

[0039] Description of the reference numerals:

[0040] 1, input shaft; 3, hollow shaft; 4, intermediate shaft; 5, output shaft; 6, first synchronizer; 7, second synchronizer; 8, third synchronizer;

[0041] 101, first half shaft; 102, second half shaft; 1021, second meshing gear;

[0042] 201. Planet carrier; 202. Sun gear; 203. Ring gear; 204. Planet gear;

[0043] 301. First meshing gear; 302. First driving gear;

[0044] 401. First driven gear; 402. Second driving gear; 403. Third driven gear;

[0045] 501. Second driven gear; 502. Output gear;

[0046] 11. Engine; 22. First motor; 33. Second motor; 44. Differential;

[0047] 4401. Input ring gear; 2201. Third driving gear. Detailed implementation mode

[0048] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0049] In the description of the present utility model, it should be noted that based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installed", "connected", "connected", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with the specific circumstances.

[0051] The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0052] Embodiment 1

[0053] This embodiment relates to a speed regulation device, which can make its overall structure more compact, occupy less space, and have more gear modes, which is beneficial to improving the driving experience. In terms of the overall structure, as shown in Figure 1 , the speed regulation device of this embodiment includes an input shaft 1, a planetary gear train, an intermediate shaft 4, an output shaft 5, and a shifting assembly.

[0054] Among them, the input shaft 1 includes a first half shaft 101 and a second half shaft 102. The carrier 201 of the planetary gear train is connected to the first half shaft 101. The sun gear 202 of the planetary gear train is arranged on the second half shaft 102. A hollow shaft 3 is connected to the ring gear 203 of the planetary gear train, and the hollow shaft 3 is sleeved on the second half shaft 102 in an idle manner. A plurality of gear pairs are provided between the hollow shaft 3 and the intermediate shaft 4. A first synchronizer 6 corresponding to each gear pair is provided on the hollow shaft 3 or the intermediate shaft 4. The first synchronizer 6 selects the corresponding gear pair, and can connect the hollow shaft 3 and the intermediate shaft 4 for transmission connection.

[0055] Meanwhile, the shifting assembly includes a first meshing gear 301 arranged on the hollow shaft 3, a second synchronizer 7 arranged on the second half shaft 102, and a second meshing gear 1021 sleeved on the second half shaft 102 in an idle manner. The second meshing gear 1021 is fixedly arranged on the housing of the speed regulating device. The second synchronizer 7 can selectively connect the first meshing gear 301, and the second synchronizer 7 can selectively connect the second meshing gear 1021. The intermediate shaft 4 and the output shaft 5 are in transmission connection.

[0056] At this time, with the above settings, the speed regulating device of the present utility model divides the input shaft 1 into a first half shaft 101 and a second half shaft 102, which is convenient for the arrangement of the planetary gear train. The power on the planetary gear train is transmitted from the hollow shaft 3 on the second half shaft 102 to the output shaft 5 through a plurality of gear pairs, making the overall arrangement more convenient, the overall structure compact, and the occupied space small. It is more convenient to be arranged on a vehicle, has more gear modes, and provides a wide selection range for the driver.

[0057] The first meshing gear 301 and the second meshing gear 1021 are provided. By engaging the first meshing gear 301 with the second synchronizer 7, the sun gear 202 and the ring gear 203 can be synchronously rotated. And by engaging the second meshing gear 1021 with the second synchronizer 7, the sun gear 202 can be braked to make the rotational speed of the sun gear 202 zero. When the power is transmitted from the first half shaft 101 through the planetary gear train to the second half shaft 102, two gears can be realized, which is beneficial to increasing the gear modes of the power transmission assembly. At the same time, the second synchronizer 7 can also realize gear shifting, and the gear shifting is convenient. When applied to a vehicle, it is beneficial to improve the power transmission efficiency. More gears make it convenient for the driver to select, which is beneficial to increasing the driving comfort.

[0058] Based on the above overall introduction, in this embodiment, as a preferred implementation form, as Figure 1As shown, two sets of gear pairs are arranged axially at intervals along the input shaft 1. Each gear pair includes a first driving gear 302 sleeved on the hollow shaft 3 and a first driven gear 401 fixed on the intermediate shaft 4. The first driving gear 302 and the first driven gear 401 are meshed and connected. At the same time, a first synchronizer 6 is arranged on the hollow shaft 3 and is located between the two first driving gears 302. The first synchronizer 6 can selectively connect any one of the first driving gears 302.

[0059] Here, each gear pair includes a first driving gear 302 and a first driven gear 401, and the first synchronizer 6 is arranged on the hollow shaft 3. When the first synchronizer 6 is disconnected from the first driving gear 302, the power between the hollow shaft 3 and the output shaft 5 is interrupted, and the two do not affect each other. When arranging multiple power sources, it is convenient to realize multiple driving modes. When the first synchronizer 6 is engaged with the driving gear, the power on the hollow shaft 3 can be transmitted to the output shaft 5 through the first driving gear 302 and the first driven gear 401. When arranging multiple power sources, multiple power sources can jointly drive the vehicle to travel, improving the power performance of the vehicle.

[0060] During specific implementation, the internal gear is meshed and connected with each planet gear 204, and the power can be transmitted from the first half shaft 101 to the planet carrier 201, so that the ring gear 203 can rotate with the planet gears 204 on the planet carrier 201, thereby driving the hollow shaft 3 to rotate. In other implementation manners, the second synchronizer 7 is moved to the left to engage with the first meshing gear 301. At this time, the power can be transmitted to the hollow shaft 3 through the second half shaft 102.

[0061] At this time, the first synchronizer 6 is moved to the left or right to engage with the first driving gear, and through the meshing between the first driving gear 302 and the first driven gear 401, the power is transmitted from the hollow shaft 3 to the intermediate shaft 4.

[0062] It should be noted that the diameters of the first driving gear 302 on the left side and the first driving gear 302 on the right side of the first synchronizer 6 are different. It should be understood that the diameters of the first driven gear 401 on the left side and the first driven gear 401 on the right side are also different, which is convenient for realizing more gear modes and improving the driving comfort.

[0063] In addition, in the above structure, it is described by taking the first driving gear 302 being sleeved on the hollow shaft 3, the first synchronizer 6 being arranged on the hollow shaft 3, and the first driven gear 401 being fixed on the intermediate shaft 4 as an example. It should be understood that the first driven gear 401 can also be sleeved on the intermediate shaft 4. In this case, a first synchronizer 6 for selectively engaging the first driven gear 401 should be arranged on the intermediate shaft 4. At this time, the first driving gear 302 can also be fixed on the hollow shaft 3.

[0064] Furthermore, in this embodiment, as a preferred implementation form, as Figure 1 shown, a second driving gear 402 is provided on the intermediate shaft 4, and a second driven gear 501 is provided on the output shaft 5. The second driving gear 402 and the second driven gear 501 are meshed and connected. Moreover, the second driving gear 402 is arranged away from the first half shaft 101 relative to the gear pair.

[0065] Here, by providing the second driving gear 402 and the second driven gear 501 on the intermediate shaft 4, the power transmitted to the intermediate shaft 4 can be continuously transmitted to the output shaft 5, with a simple structure and low cost. The second driving gear 402 is arranged away from the first half shaft 101 relative to the gear pair, which is convenient for overall arrangement.

[0066] Secondly, in this embodiment, as a preferred implementation form, referring to Figure 1 shown in, an output gear 502 is provided on the output shaft 5. The output gear 502 is used to be meshed and connected with the input gear ring 4401 of the differential 44. The advantage of such a setting is that the power transmitted to the output shaft 5 in each gear can be transmitted outward through the output gear 502, which is convenient for overall arrangement.

[0067] During specific implementation, through the meshing between the second driving gear 402 and the second driven gear 501, the power on the intermediate shaft 4 is transmitted to the output shaft 5, and the output gear 502 on the output shaft 5 is meshed with the input gear ring 4401 on the differential 44, so that the power on the output shaft 5 can be transmitted to the differential 44.

[0068] Embodiment 2

[0069] This embodiment relates to a power system, which includes the speed regulation device in Embodiment 1 and also includes a power source. Moreover, the power source is in transmission connection with the speed regulation device.

[0070] For the power system described in the present utility model, by applying the above speed regulation device, on the basis of being structurally compact and occupying less space, it is convenient to realize multiple gears, with smooth gear shifting, convenient for arrangement on a vehicle, and can increase the driving comfort of the driver.

[0071] Moreover, in this embodiment, as a preferred implementation form, as Figure 1 and Figure 2 shown in, the power source includes an engine 11, and the power output end of the engine 11 is connected to the first half shaft 101.

[0072] Thus, the power source includes the engine 11, including two connection modes: the power output end of the engine 11 is directly connected to the first semi-shaft 101, and a clutch is arranged between the power output end of the engine 11 and the first semi-shaft 101. The first semi-shaft 101 is directly connected to the power output end of the engine 11, so that the power of the engine 11 can be directly transmitted to the first semi-shaft 101. This structure without the need to arrange a clutch has a good beneficial effect of reducing weight and reducing costs. The clutch is arranged between the first semi-shaft 101 and the power output end of the engine 11, so that the power between the first semi-shaft 101 and the power output end of the engine 11 can be engaged or disconnected as needed, and the gear shift is convenient when it is disconnected.

[0073] When implementing it, Figure 1 As shown in , the power output end of the engine 11 can be directly connected to the first half shaft 101. When the power output end of the engine 11 is directly connected to the first half shaft 101, the clutch can be omitted, which has the beneficial effects of reducing weight and reducing production costs. It should be understood that Figure 2 As shown in , a clutch may also be provided between the power output end of the engine 11 and the first half shaft 101 , and the clutch is used to control the power on and off between the power output end of the engine 11 and the first half shaft 101 .

[0074] In addition, in this embodiment, as a preferred implementation form, Figure 1 As shown in , the power source of this embodiment also includes a first motor 22, and the power output end of the first motor 22 is connected to the output shaft 5. Here, the first motor 22 is set so that the power output end of the first motor 22 is connected to the output shaft 5, which is convenient for cooperating with the engine 11 to realize the hybrid driving mode. It can be understood that Figure 3 As shown in FIG. 8 , it is also possible to omit the first motor 22 .

[0075] In addition, in this embodiment, as a preferred implementation form, Figure 4 As shown, the motor shaft of the first motor 22 is a hollow structure, and the first motor 22 and the motor shaft are both sleeved on the output shaft 5. In addition, a third driving gear 2201 is provided on the motor shaft, and a third driven gear 403 is sleeved on the intermediate shaft 4. The third driving gear 2201 and the third driven gear 403 are meshed and connected, and a third synchronizer 8 is provided on the intermediate shaft 4, and the third synchronizer 8 is selectively connected to the third driven gear 403.

[0076] It should be noted that, in this embodiment, as another preferred implementation form, Figure 1 As shown in , the motor shaft is provided with a third driving gear 2201 , the intermediate shaft 4 is provided with a third driven gear 403 , and the third driving gear 2201 and the third driven gear 403 are meshed and connected.

[0077] By setting as above, the motor shaft of the first motor 22 is sleeved on the output shaft 5, which is convenient for saving layout space. The third synchronizer 8 is set. When the third synchronizer 8 is disconnected from the third driven gear 403, the engine 11 charges the first motor 22, and the first motor 22 is used as the starting motor of the engine 11. There is no need to reversely drag the first motor 22, which is conducive to saving energy. When the third synchronizer 8 is engaged with the third driven gear 403, the first motor 22 can cooperate with the engine 11 to increase the power performance of the vehicle. It should be understood that the first motor 22 can also cooperate with the second motor 33 to improve the power performance of the vehicle.

[0078] Furthermore, when the first synchronizer 6 is disconnected from the first driving gear 302 , the first motor 22 can output power alone through the engagement of the third synchronizer 8 with the third driven gear 403 , so that the power transmission assembly has a pure electric drive mode.

[0079] In specific implementation, the third driven gear 403 can also be loosely sleeved on the intermediate shaft 4, and the third synchronizer 8 is moved to the left to engage with the third driven gear 403. At this time, the power provided by the first motor 22 can be transmitted to the intermediate shaft 4 through the meshing between the third driving gear 2201 and the third driven gear 403. It is worth mentioning that, referring to Figure 3 As shown in , the third synchronizer 8 can be omitted, and the third driven gear 403 is fixed on the intermediate shaft 4, and the power is transmitted to the intermediate shaft 4 through the meshing between the third driving gear 2201 and the third driven gear 403.

[0080] After the power is transmitted to the intermediate shaft 4, the first synchronizer 6 is meshed with the first active output gear on the left or the first gear on the right, and the power is transmitted to the corresponding first active gear 302 through the first driven gear 401, so that the engine 11 and the first motor 22 can be matched, thereby improving the power performance of the vehicle. At this time, the second synchronizer 7 can also be moved to the left to engage with the first meshing gear 301, so that the first motor 22 and the second motor 33 can be matched, thereby improving the power performance of the vehicle.

[0081] In addition, in this embodiment, as a preferred implementation form, Figure 1 As shown in , the power system of this embodiment further includes a second motor 33 , a power output shaft of the second motor 33 is drivingly connected to the second half shaft 102 , and the engine 11 and the second motor 33 are disposed at both ends of the input shaft 1 .

[0082] By setting the second motor 33, the power output end of the second motor 33 is connected to the second half shaft 102, forming a structure in which the power output end of the second motor 33 is in transmission connection with the sun gear 202, so that the power of the second motor 33 can be transmitted to the hollow shaft 3 through the sun gear 202, thereby facilitating the output of power and facilitating the vehicle to be driven by the second motor 33.

[0083] The engine 11 and the second motor 33 are respectively arranged at both ends of the input shaft 1, which is convenient for realizing modes such as series connection, power splitting and direct drive. The engine 11 can work to charge the second motor 33, which is beneficial to saving energy. The second motor 33 can also be used as a starting motor for the engine 11, saving the cost of separately matching a starting motor for the engine 11. At the same time, the engine 11 and the second motor 33 can also jointly output power, so that the power transmission assembly has a hybrid drive mode.

[0084] Embodiment III

[0085] This embodiment relates to a vehicle, which includes the power system in Embodiment II and a third motor. The power system in Embodiment II is in transmission connection with one of the drive axles of the vehicle, and the third motor is in transmission connection with the other drive axle of the vehicle. The drive axle mentioned here can also be any drive axle of the vehicle.

[0086] The vehicle in this embodiment has the technical advantages of the power system in Embodiment II, which will not be elaborated here.

[0087] It still needs to be explained here that the third motor can be a generator or a motor. Taking this vehicle as a four-wheel drive vehicle as an example, when the power system in Embodiment II is in transmission connection with the front drive axle, for example, when the power system is in transmission connection with the front drive axle, the third motor is in transmission connection with the rear drive axle of the vehicle. The transmission connection method can be a direct connection or a transmission connection with the rear drive axle through a power transmission component such as a gear train. The specific transmission connection method can refer to the structure in the prior art.

[0088] It should be understood that in other types of vehicles, the third motor can also be in transmission connection with the front drive axle of the vehicle, while the power system in Embodiment II is in transmission connection with the rear drive axle. It should also be explained here that the third motor can be a hub motor, and its installation method can refer to the prior art.

[0089] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A speed regulating device, characterized in that: It comprises an input shaft (1), a planetary gear train, an intermediate shaft (4), an output shaft (5) and a shift assembly; The input shaft (1) comprises a first half shaft (101) and a second half shaft (102); the planet carrier (201) of the planetary gear train is connected to the first half shaft (101); the sun gear (202) of the planetary gear train is arranged on the second half shaft (102); the ring gear (203) of the planetary gear train is connected to a hollow shaft (3); and the hollow shaft (3) is loosely sleeved on the second half shaft (102); A plurality of gear pairs are arranged between the hollow shaft (3) and the intermediate shaft (4); a first synchronizer (6) corresponding to each of the gear pairs is arranged on the hollow shaft (3) or the intermediate shaft (4); the first synchronizer (6) selects the corresponding gear pair to enable the hollow shaft (3) to be transmission-connected with the intermediate shaft (4); The shift assembly comprises a first meshing gear (301) arranged on the hollow shaft (3), a second synchronizer (7) arranged on the second half shaft (102), and a second meshing gear (1021) sleeved on the second half shaft (102), the second meshing gear (1021) being arranged on a housing of the speed regulating device, the second synchronizer (7) being selectively connected to the first meshing gear (301), and the second synchronizer (7) being selectively connected to the second meshing gear (1021); The intermediate shaft (4) and the output shaft (5) are drivingly connected.

2. The speed regulating device according to claim 1, characterized in that: Two sets of gear pairs are arranged axially at intervals along the input shaft (1), each of the gear pairs comprising a first driving gear (302) loosely sleeved on the hollow shaft (3), and a first driven gear (401) fixedly mounted on the intermediate shaft (4), the first driving gear (302) and the first driven gear (401) being meshed and connected; The first synchronizer (6) is arranged on the hollow shaft (3) and is located between the two first driving gears (302). The first synchronizer (6) can be selectively connected to any one of the first driving gears (302).

3. The speed regulating device according to claim 2, characterized in that: The intermediate shaft (4) is provided with a second driving gear (402), the output shaft (5) is provided with a second driven gear (501), and the second driving gear (402) and the second driven gear (501) are meshed and connected; The second driving gear (402) is arranged away from the first half shaft (101) relative to the gear pair.

4. The speed regulating device according to any one of claims 1 to 3, characterized in that: An output gear (502) is provided on the output shaft (5), and the output gear (502) is used to mesh with the input gear ring (4401) of the differential (44).

5. A power system, characterized in that: The speed regulating device according to any one of claims 1 to 4 further comprises a power source, The power source is transmission connected to the speed regulating device.

6. The power system according to claim 5, characterized in that: The power source comprises an engine (11), and a power output end of the engine (11) is connected to the first half shaft (101).

7. The power system according to claim 6, characterized in that: It also comprises a first motor (22), wherein a power output end of the first motor (22) is drivingly connected to the output shaft (5).

8. The power system according to claim 7, characterized in that: The motor shaft of the first motor (22) is a hollow structure, and the first motor (22) and the motor shaft are both sleeved on the output shaft (5); The motor shaft is provided with a third driving gear (2201), the intermediate shaft (4) is provided with a third driven gear (403), the third driving gear (2201) and the third driven gear (403) are meshed and connected, the intermediate shaft (4) is provided with a third synchronizer (8), and the third synchronizer (8) is selectively connected to the third driven gear (403); or, the motor shaft is provided with a third driving gear (2201), the intermediate shaft (4) is provided with a third driven gear (403), and the third driving gear (2201) and the third driven gear (403) are meshed and connected.

9. The power system according to claim 6, characterized in that: It also includes a second motor (33), the power output shaft of the second motor (33) is drivingly connected to the second half shaft (102), and the engine (11) and the second motor (33) are respectively arranged at two ends of the input shaft (1).

10. A vehicle, characterized in that: The vehicle is provided with a power system and a third motor as described in any one of claims 5 to 9, The power system is drivingly connected to one drive axle of the vehicle, and the third motor is drivingly connected to another drive axle of the vehicle.

Images