Differential assembly, vehicle power system and vehicle

Abstract

According to the differential assembly, the synchronizing device is selectively connected with the second power transmission assembly or the third power transmission assembly, so that the second power transmission assembly or the third power transmission assembly is in transmission connection with the rotating part; the driving device can enable the first torque transmission piece to reciprocate, so that the first torque transmission piece can be connected or disconnected with the second torque transmission piece, the first half shaft and the second half shaft are in transmission connection or disconnection, and the arranged rotating part is in transmission connection with the first half shaft and the second half shaft. According to the differential assembly, the function of differential rotation of the two half shafts can be achieved, the first torque transmission piece can be connected or disconnected with the second torque transmission piece through reciprocating motion so as to enable the first half shaft and the second half shaft to be in transmission connection or disconnected, and the synchronizer is arranged to select the second power transmission assembly or the third power transmission assembly. And more gear modes can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a differential assembly. At the same time, the utility model also relates to a vehicle power system using the differential assembly, and a vehicle equipped with the vehicle power system. Background Art

[0002] In current vehicles, the vehicle power system generally includes two half-axles and a differential. The differential can realize differential rotation of the two half-axles, so that the two wheels can rotate differentially, thereby improving the driving safety of the vehicle.

[0003] Some products will also add a synchronization device on the basis of the differential to achieve the function of connecting or disconnecting the two half-shafts, that is, the two half-shafts can rotate differentially or synchronously. In addition, in some vehicles, the traditional differential is cancelled and two first planetary gear systems are used to achieve the differential rotation function of the two half-shafts.

[0004] Based on the existing product structure, if the synchronization device is cancelled, the vehicle power system cannot achieve the function of engaging or disconnecting the two half-shafts, and if the traditional differential is cancelled, the existing differential assembly cannot achieve the function of differential rotation of the two half-shafts.

[0005] In addition, existing vehicle power systems have problems such as too few gears and inconvenient operation. Utility Model Content

[0006] In view of this, the utility model aims to provide a differential assembly with more gears, which can realize the functions of engaging and disconnecting two half-shafts, and can realize the function of differential rotation when the two half-shafts are disconnected.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A differential assembly includes an axle body, a differential control device, a first power transmission component, a second power transmission component, a third power transmission component and a synchronization device;

[0009] The shaft body includes a first half shaft and a second half shaft;

[0010] The first power transmission assembly includes a fixed shaft and a rotating part loosely sleeved on the fixed shaft, and the rotating part is drivingly connected to the first half shaft;

[0011] The synchronizing device is selectively connected to the second power transmission component, so that the second power transmission component is in transmission connection with the rotating part, or the synchronizing device is selectively connected to the third power transmission component, so that the third power transmission component is in transmission connection with the rotating part;

[0012] The differential control device includes a drive device, a first torque transmission member and a second torque transmission member; the drive device is fixedly arranged relative to the first half-shaft, the first torque transmission member is connected to the power output end of the drive device, and the second torque transmission member is arranged on the second half-shaft. The drive device can drive the first torque transmission member to reciprocate, and the first torque transmission member can engage or disconnect with the second torque transmission member to make the first half-shaft and the second half-shaft connected or disconnected in driving.

[0013] Furthermore, a transmission wheel is fixedly provided on the first half shaft, and the transmission wheel is in transmission connection with the rotating part;

[0014] The driving device includes a linear driving device arranged on the transmission wheel, and the linear driving device drives the first torque transmission member to reciprocate along the axial direction of the shaft body; the linear driving device includes any one of a linear motor, a hydraulic cylinder, a pneumatic cylinder and an electromagnetic driving unit.

[0015] Furthermore, a fourth power transmission assembly is disposed on the second half-shaft; the second power transmission assembly and the third power transmission assembly can be respectively connected to the rotating part through the fourth power transmission assembly.

[0016] Further, the fourth power transmission assembly includes a first planetary gear train, a first planet carrier of the first planetary gear train is fixed on the second half shaft, and a first ring gear of the first planetary gear train is transmission-connected to the rotating part;

[0017] The first sun gear of the first planetary gear train can be drivingly connected to the second power transmission assembly or the third power transmission assembly, respectively.

[0018] Furthermore, it also includes a power source, wherein the output shaft of the power source is loosely sleeved on the second half shaft;

[0019] The second power transmission assembly includes a second planetary gear train, wherein the second sun gear of the second planetary gear train is drivingly connected to the output shaft of the power source; the second ring gear of the second planetary gear train is drivingly connected to the first sun gear of the first planetary gear train; the second planet carrier of the second planetary gear train is drivingly connected to a hollow shaft loosely sleeved on the output shaft of the power source,

[0020] A first wheel is provided on the output shaft of the power source, the third power transmission component includes a second wheel provided on the hollow shaft, the second wheel is fixed on the housing of the differential assembly, the synchronizing device is provided on the hollow shaft, and the synchronizing device selectively connects the first wheel or the second wheel.

[0021] Furthermore, it also includes a power source, wherein the output shaft of the power source is loosely sleeved on the second half shaft,

[0022] The second power transmission assembly includes a second planetary gear train, and a second sun gear of the second planetary gear train is disposed on an output shaft of the power source;

[0023] The second planet carrier of the second planetary gear train is provided with a first rotating wheel, and the third power transmission assembly includes a second rotating wheel provided on the output shaft of the power source;

[0024] The first sun gear of the first planetary gear train is drivingly connected with a hollow shaft, and the synchronizing device is arranged on the hollow shaft. The synchronizing device is selectively connected with the first rotating wheel or the second rotating wheel.

[0025] Furthermore, it also includes a hollow shaft and a power source which are sleeved on the second half shaft;

[0026] The second power transmission assembly includes a first driving wheel arranged on the output shaft of the power source, and a first driven wheel arranged on the hollow shaft, and the first driving wheel and the first driven wheel are in transmission connection;

[0027] The third power transmission assembly includes a second driving wheel arranged on the output shaft of the power source, and a second driven wheel arranged on the hollow shaft, and the second driving wheel and the second driven wheel are drivingly connected;

[0028] The hollow shaft is drivingly connected to the first sun gear of the first planetary gear train. The synchronizing device is disposed on the hollow shaft. The synchronizing device is selectively connected to the first driven wheel or the second driven wheel.

[0029] Furthermore, the first power transmission components are divided into two groups, and the two groups of the first power transmission components are respectively disposed on both sides of the shaft body.

[0030] Compared with the prior art, the utility model has the following advantages:

[0031] The differential assembly described in the utility model is provided with a synchronization device to select the second power transmission component or the third power transmission, which can realize more gear modes, improve the convenience of user selection, and can be applied to more working conditions; because a fixed shaft and a rotating part are provided, the function of differential rotation when the two half-shafts are disconnected can be realized, and the first torque transmission member can be reciprocated to engage or disconnect with the second torque transmission member to connect or disconnect the first half-shaft and the second half-shaft. The overall structure is simple and the cost is low, and it can be widely used in passenger car models.

[0032] In addition, by arranging a transmission wheel on the first semi-axle, it is convenient to connect with the rotating part, and the driving device is arranged as a linear driving device, which is easy to move and convenient for overall arrangement. The linear driving device includes any one of a linear motor, a hydraulic cylinder, a cylinder and an electromagnetic driving part, and existing standard parts can be used, which is conducive to reducing production costs.

[0033] In addition, a fourth power transmission assembly is arranged on the second half shaft to facilitate the overall layout. The fourth power transmission assembly is set as the first planetary gear train, which is convenient for transmission connection with the rotating part, can realize the deceleration function, and make the overall structure more compact. The specific connection structure and arrangement of the second power transmission assembly, the third power transmission assembly, the synchronization device and the power source are all for realizing more gears, which can improve the convenience of user selection and can be applied to more working conditions.

[0034] At the same time, the first power transmission components are provided in two groups, and the two groups of first power transmission components are placed on both sides of the shaft body, which is beneficial to improving the stability of the differential rotation of the first half shaft and the second half shaft.

[0035] Another object of the present invention is to provide a vehicle power system, which includes the differential assembly as described above.

[0036] At the same time, another object of the present invention is to provide a vehicle, on which the vehicle power system as described above is provided.

[0037] The vehicle and vehicle power system described in the present invention have the same beneficial effects as the aforementioned differential assembly relative to the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0039] Figure 1 This is a structural schematic diagram of the differential assembly in the application state according to the first embodiment of the utility model;

[0040] Figure 2 This is a schematic structural diagram of the differential assembly in the application state according to the second embodiment of the present utility model;

[0041] Figure 3 This is a schematic diagram of the structure of the differential assembly in the application state according to the third embodiment of the present utility model;

[0042] Figure 4 for Figure 3 Schematic diagram of the structure in which the first half shaft and the second half shaft of the differential assembly are in an engaged state.

[0043] Description of reference numerals:

[0044] 1. Axle body; 101. First semi-axle; 102. Second semi-axle; 1011. Transmission wheel;

[0045] 2. differential control device; 201. drive device; 202. first torque transmission member; 203. second torque transmission member;

[0046] 3. First power transmission assembly; 301. Fixed shaft; 302. Rotating part;

[0047] 401, first sun gear; 402, first planet gear; 403, first planet carrier; 404, first ring gear;

[0048] 5. Power source; 6. Wheels; 7. Synchronizing device;

[0049] 801, second sun gear; 802, second planetary gear; 803, second planet carrier; 804, second ring gear;

[0050] 9. Hollow shaft; 10. First rotor; 11. Second rotor;

[0051] 1201, a first driving wheel; 1202, a first driven wheel;

[0052] 1301, a second driving wheel; 1302, a second driven wheel. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0054] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0056] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0057] Embodiment 1

[0058] The present embodiment relates to a differential assembly. By setting a second power transmission component and a third power transmission component, more gear modes can be realized. By adding a differential control device 2, the first half-shaft 101 and the second half-shaft 102 can be controlled to engage and disconnect, thereby realizing a locking function. When the first half-shaft 101 and the second half-shaft 102 are disconnected, the function of differential rotation of the first half-shaft 101 and the second half-shaft 102 can also be realized.

[0059] Based on the above design ideas, such as Figure 1 As shown, the differential assembly involved in this embodiment has the functions of multiple gears, speed reduction and differential. In terms of overall structure, the differential assembly mainly includes an axle body 1, a differential control device 2 and a first power transmission component 3.

[0060] Among them, the shaft body 1 includes a first half shaft 101 and a second half shaft 102, the first power transmission component 3 includes a fixed shaft 301 and a rotating part 302 loosely mounted on the fixed shaft 301, the fixed shaft 301 is fixed on the housing of the differential assembly, and the rotating part 302 is transmission-connected to the first half shaft 101.

[0061] The synchronizing device 7 selectively connects to the second power transmission component, so that the second power transmission component can be transmission-connected to the rotating part 302 , or the synchronizing device 7 selectively connects to the third power transmission component, so that the third power transmission component can be transmission-connected to the rotating part 302 .

[0062] When the synchronizing device 7 is connected to the second power transmission assembly, the power of the power source 5 can be transmitted to the rotating part 302 , and when the synchronizing device 7 is connected to the third power transmission assembly, the power of the power source 5 can also be transmitted to the rotating part 302 .

[0063] As a preferred embodiment, a first gear and a second gear are provided on the rotating part 302, and the first gear and the second gear are arranged along the axial spacing of the fixed shaft 301, and the first gear is used for transmission connection with the first half shaft 101, and the second gear can be transmission connected with the second power transmission component or the third power transmission component.

[0064] It should be understood that in the present embodiment, all structures that use gears to achieve transmission connection between two components have high power transmission efficiency, high stability and reliability of power transmission. In other embodiments, it is also possible to use belt drive or chain drive to achieve transmission connection between two components, or it is also feasible for the two components to achieve transmission connection with the aid of an intermediate gear or other structure that can transmit power.

[0065] In this embodiment, the differential control device 2 is used to control the engagement or disconnection between the first half-shaft 101 and the second half-shaft 102. When the differential control device 2 disconnects the first half-shaft 101 and the second half-shaft 102, power can still be transmitted between the first half-shaft 101 and the second half-shaft 102, thereby realizing the function of differential rotation of the first half-shaft 101 and the second half-shaft 102. The so-called differential rotation means that when power is transmitted between the first half-shaft 101 and the second half-shaft 102, the actual speed that the driven member can reach is different from the theoretical speed, and the differential assembly can still work normally.

[0066] Still refer to Figure 1 As shown, the aforementioned differential control device 2 is different from a conventional differential. In this embodiment, the differential control device 2 includes a driving device 201, a first torque transmission member 202, and a second torque transmission member 203. The driving device 201 is fixedly arranged relative to the first semi-shaft 101, the first torque transmission member 202 is connected to the power output end of the driving device 201, and the second torque transmission member 203 is arranged on the second semi-shaft 102. The driving device 201 can make the first torque transmission member 202 reciprocate, and the first torque transmission member 202 can be engaged or disconnected with the second torque transmission member 203, so that the first semi-shaft 101 and the second semi-shaft 102 are connected or disconnected in driving.

[0067] It should be noted here that the first torque transmission component 202 in this embodiment may be, for example, a coupling sleeve, and the second torque transmission component 203 may be, for example, a locking ring, also called a synchronization ring. When the driving device 201 drives the coupling sleeve to approach the locking ring and engage with the locking ring, the first torque transmission component 202 and the second torque transmission component 203 engage, and the two can transmit torque, and the first half shaft 101 and the second half shaft 102 are connected in transmission.

[0068] When the driving device 201 drives the coupling sleeve away from the locking ring and disconnects from the locking ring, the first torque transmission member 202 and the second torque transmission member 203 are disconnected, and both cannot transmit torque. The first half shaft 101 and the second half shaft 102 are disconnected, and the first half shaft 101 and the second half shaft 102 cannot transmit torque through the first torque transmission member 202 and the second torque transmission member 203.

[0069] In this embodiment, the first torque transmission member 202 may also be a lock ring, and in this case, the second torque transmission member 203 may be a coupling sleeve. In addition, the first torque transmission member 202 and the second torque transmission member 203 may also be coupled with other structures to achieve torque transmission, such as end face splines or a plug-in structure of plug-in connection.

[0070] As a preferred embodiment, a transmission wheel 1011 is provided on the first semi-axle 101, and the transmission wheel 1011 is transmission-connected with the rotating part 302. In this embodiment, the transmission wheel 1011 and the rotating part 302 are transmission-connected by a gear structure, and specifically, the transmission wheel 1011 is meshed with the first gear.

[0071] The aforementioned driving device 201 includes a linear driving device fixed on the transmission wheel 1011, and the linear driving device drives the first torque transmission member 202 to reciprocate along the axial direction of the shaft body 1. Here, by arranging the transmission wheel 1011 on the first semi-shaft 101, it is convenient to be connected to the rotating part 302 by transmission, and the driving device 201 is arranged as a linear driving device, which is simple to move and convenient for overall arrangement.

[0072] It should be noted that, in addition to being fixed on the transmission wheel 1011, the linear drive device can also be directly fixed on the first semi-axle 101. In addition to the linear drive device, the drive device 201 can also include a rotation drive device 201, but it is also necessary to include a power transmission structure to achieve the function of driving the first torque transmission member 202 to reciprocate. For details, refer to the existing structure. The power transmission structure here includes, for example, a screw pair, a gear pair, a spring, etc., which can achieve the function of driving the first torque transmission member 202 to reciprocate.

[0073] In addition, the first torque transmission member 202 can be directly disposed at the power output end of the driving device 201, or can be connected to the power output end of the driving device 201. Figure 1 In the state shown, the first torque transmission member 202 has a connecting shaft extending to the left, and a through hole is provided on the rotation. The first torque transmission member 202 is transmitted to the through hole to the left through the connecting shaft. A structure that reduces the sliding resistance of the connecting shaft along its own axial direction can also be arranged between the through hole and the connecting shaft, and the left end of the connecting shaft is connected to the power output end of the driving device 201, thereby realizing the function of the driving device 201 driving the first torque transmission member 202 to move back and forth.

[0074] As a preferred embodiment, the linear drive device includes any one of a linear motor, a hydraulic cylinder, a pneumatic cylinder, and an electromagnetic drive unit. The structures of the linear motor, the hydraulic cylinder, the pneumatic cylinder, and the electromagnetic drive unit can refer to the existing structure, and can directly drive the first torque transmission member 202 to reciprocate, or drive the first torque transmission member 202 to reciprocate with the help of the existing power transmission structure. In this structure, the linear drive device includes any one of a linear motor, a hydraulic cylinder, a pneumatic cylinder, and an electromagnetic drive unit, and existing standard parts can be used, which is conducive to reducing production costs.

[0075] As a preferred embodiment, a fourth power transmission assembly is provided on the second half shaft 102, and the second power transmission assembly and the third power transmission assembly can be respectively connected to the rotating part 302 through the fourth power transmission assembly. Here, the fourth power transmission assembly is provided on the second half shaft 102 to facilitate the overall layout.

[0076] As a preferred embodiment, still refer to Figure 1 As shown, the fourth power transmission assembly includes a first planetary gear train. For the convenience of description, the components of the first planetary gear train in this embodiment are referred to as the first sun gear 401, the first planetary gear 402, the first planet carrier 403 and the first ring gear 404.

[0077] Among them, the first planet carrier 403 is fixed on the second half shaft 102, and the first ring gear 404 is connected to the rotating part 302 in a transmission manner. For example, in this embodiment, the first ring gear 404 is meshed and connected with the aforementioned second gear. The first sun gear 401 can be connected to the second power transmission component or the third power transmission component in a transmission manner. Here, the fourth power transmission component is set as the first planetary gear train, which is convenient for transmission connection with the rotating part 302, can realize the deceleration function, and makes the overall structure more compact.

[0078] It should be understood that the fourth power transmission component is used to realize the function of transmitting power between the rotating part 302 and the second power transmission component or the third power transmission component. In addition to the first planetary gear system, other structures such as gear pairs are also feasible. In addition, the fourth power transmission component can also realize a deceleration function, which can decelerate the rotation speed transmitted from the power source 5 described below to the fourth power transmission component and transmit it to the rotating part 302.

[0079] As a preferred implementation, the differential assembly of this embodiment also includes a power source 5. Preferably, the power source 5 adopts an electric motor, which preferably has the functions of both an electric motor and a generator. The electric motor is coaxially arranged with the second half shaft 102, occupies a small space and has a compact structure.

[0080] As in this embodiment, the output shaft of the power source 5 is loosely mounted on the second half-shaft 102, and the second power transmission assembly includes a second planetary gear train. For the convenience of description, the components of the second planetary gear train in this embodiment are referred to as the second sun gear 801, the second planetary gear 802, the second planetary carrier 803 and the second ring gear 804.

[0081] The second sun gear 801 is drivingly connected to the output shaft of the power source 5, the second ring gear 804 is drivingly connected to the first sun gear 401 of the first planetary gear train, and the second planet carrier 803 is drivingly connected to the hollow shaft 9 loosely sleeved on the output shaft of the power source 5. Preferably, the second sun gear 801 is fixedly connected to the output shaft of the power source 5, the second planet carrier 803 is fixedly connected to the hollow shaft 9, and the second ring gear 804 is fixedly connected to the first sun gear 401.

[0082] In this embodiment, Figure 1 The second planetary gear train shown may also be other existing planetary gear trains, for example, it may be a single-stage planetary gear train or a multi-stage planetary gear train.

[0083] The output shaft of the power source 5 is provided with a first rotating wheel 10, preferably, the first rotating wheel 10 is fixedly provided on the output shaft of the power source 5, the third power transmission assembly comprises a second rotating wheel 11 provided on the hollow shaft 9, the second rotating wheel 11 is fixedly provided on the housing of the differential assembly, and the second rotating wheel 11 is loosely sleeved on the hollow shaft 9. The synchronizing device 7 can adopt an existing structure, the synchronizing device 7 is provided on the hollow shaft 9, the hollow shaft 9 is loosely sleeved on the output shaft of the power source 5, and the synchronizing device 7 is selectively connected to the first rotating wheel 10 or the second rotating wheel 11.

[0084] When the synchronizing device is engaged with the first rotating wheel 10 , the first rotating wheel 10 , the second sun gear 801 , the second planetary gear 802 , and the second planetary carrier 803 are equivalent to a whole, and the power provided by the power source 5 is directly transmitted to the second ring gear 804 and the first sun gear 401 .

[0085] When the synchronizing device is engaged with the second rotating wheel 11 , the second rotating wheel 11 and the second planetary carrier 803 are fixed, and the power provided by the power source 5 passes through the second sun gear 801 , the second planetary gear 802 , and the second ring gear 804 to the first sun gear 401 .

[0086] When the synchronizing device 7 is not engaged with the first rotating wheel 10 and the second rotating wheel 11, that is, the synchronizing device 7 is in the middle position, the power of the power source 5 can be disconnected at this time. When the differential assembly is applied to any drive axle and used in conjunction with another drive axle (the drive axle housing is a hybrid or pure electric drive), if only the other drive axle needs to be driven, the power of the power source 5 can be disconnected to avoid the output shaft in the drive axle using the differential assembly dragging the power source 5 to reverse, thereby preventing energy loss.

[0087] For example, when the differential assembly is applied to the rear drive axle, matched with the front drive axle and only the front drive axle is required to drive (the front axle can be hybrid or pure electric), the differential assembly can disconnect the power transmission of the rear axle to avoid the rear axle output shaft dragging the power source 5 to reverse and cause energy loss.

[0088] As a preferred embodiment, continue to refer to Figure 1 As shown, there are two sets of first power transmission components, and the two sets of first power transmission components are placed on both sides of the shaft body 1. At the same time, the first power transmission components are set as two sets, and the two sets of first power transmission components are placed on both sides of the shaft body 1, which is conducive to improving the stability of the differential rotation of the first half shaft 101 and the second half shaft 102.

[0089] It should be noted that the first power transmission assembly has two groups, which can better ensure the stability of the differential rotation of the first semi-shaft 101 and the second semi-shaft 102, and is light in weight and low in cost. In addition, it is also feasible to set the number of the first power transmission assembly to other values, such as 1 or more than 3. When the number of the first power transmission assembly is more than 3, the more than 3 first power transmission assemblies are distributed at intervals around the axial direction of the shaft body 1, preferably evenly distributed at intervals, so as to improve the stability of the differential rotation of the first semi-shaft 101 and the second semi-shaft 102.

[0090] The first half shaft 101 and the second half shaft 102 are in a disconnected state (eg Figure 1 ), at this time, the differential control device 2 is in the disconnection mode, and the power transmitted to the first sun gear 401 drives the first planetary gear 402 to drive the first planetary carrier 403 to transmit the power to the second half shaft 102.

[0091] Next, since the rotating part 302 and the first planetary gear 402 are in transmission connection with the first ring gear 404, the first planetary gear 402 drives the first ring gear 404, and the first ring gear 404 drives the rotating part 302 to rotate. Since the rotating part 302 is in transmission connection with the transmission wheel 1011, the power is transmitted to the first half shaft 101 through the transmission wheel 1011, and the first half shaft 101 and the second half shaft 102 respectively drive the wheels 6 on the corresponding sides to rotate, so that the differential assembly can replace the deceleration differential effect of the traditional differential, and the vehicle can travel normally.

[0092] The first half shaft 101 and the second half shaft 102 are in a joined state (eg Figure 4 ), at this time, the differential control device 2 is in the engagement mode, connecting the first half shaft 101 and the second half shaft 102 into one, and the power transmitted to the first sun gear 401 drives the first planetary gear 402 to drive the first planetary carrier 403, thereby transmitting the power to the first half shaft 101 and the second half shaft 102.

[0093] At this time, the first ring gear 404 and the rotating part 302 can still work in a normal transmission relationship. At this time, the differential assembly can enable the vehicle to escape from trouble under special working conditions (such as wet and muddy roads).

[0094] The differential assembly of this embodiment has various components arranged in the axial direction, which saves radial space and is convenient for the layout of the whole vehicle. It can be applied to the front drive axle and used in conjunction with the rear drive axle, and can also be applied to the rear drive axle to cooperate with the front drive axle. It can be widely used in passenger car models. For example, when the differential assembly is applied to the rear drive axle and used in conjunction with the front drive axle, if only the front drive axle is required to drive, the power transmission of the rear drive axle can be disconnected to avoid the output shaft of the rear drive axle dragging the power source 5 to reverse and cause energy loss. Of course, it is also feasible to apply the differential assembly of this embodiment to the front drive axle, in which case the output shaft of the front drive axle can avoid dragging the power source 5 to reverse and cause energy loss.

[0095] In this embodiment, the synchronization device 7 is provided to select the second power transmission component or the third power transmission, which can realize more gear modes, improve the convenience of user selection, and can be applicable to more working conditions; since the fixed shaft 301 and the rotating part 302 are provided, the function of differential rotation of the two half-shafts can be realized, and the first torque transmission member 202 can also be reciprocated to engage or disconnect with the second torque transmission member 203 to make the first half-shaft 101 and the second half-shaft 102 connected or disconnected in transmission. The overall structure is simple and the cost is low, and it can be widely used in passenger car models.

[0096] Embodiment 2

[0097] This embodiment relates to a differential assembly, such as Figure 2 As shown, it has substantially the same structure as the differential assembly of the first embodiment, and the difference mainly lies in the structures of the power source 5 , the second power transmission component, the third power transmission component and the synchronization device 7 .

[0098] In this embodiment, the arrangement of the power source 5 is the same as that in the first embodiment. The output shaft of the power source 5 is loosely mounted on the second half shaft 102. The second power transmission assembly includes a second planetary gear train. For the convenience of description, the components of the second planetary gear train in this embodiment are referred to as the second sun gear 801, the second planetary gear 802, the second planetary carrier 803 and the second ring gear 804.

[0099] The second sun gear 801 is arranged on the output shaft of the power source 5, and the connection relationship is preferably fixed, and the second ring gear 804 is fixed on the housing of the differential assembly. The second planet carrier 803 is provided with a first runner 10. The third power transmission component includes a second runner 11 arranged on the output shaft of the power source 5, and the first sun gear 401 is drivingly connected with a hollow shaft 9, and the connection relationship is preferably fixed, and the hollow shaft 9 is sleeved outside the second runner 11.

[0100] In this embodiment, Figure 2 The second planetary gear train shown can be an existing planetary gear train, such as a single-stage planetary gear train or a multi-stage planetary gear train. The first rotating wheel 10 is fixed on the second planet carrier 803 , and the second rotating wheel 11 is fixed on the output shaft of the power source 5 .

[0101] The structure of the synchronization device 7 may refer to the existing structure. The synchronization device 7 is arranged on the hollow shaft 9 , and the synchronization device 7 is selectively connected to the first rotating wheel 10 or the second rotating wheel 11 .

[0102] When the synchronizing device is engaged with the first rotating wheel 10, the power of the power source 5 can pass through the second sun gear 801, the second planetary gear 802, the second planetary carrier 803, the first rotating wheel 10, the synchronizing device 7, and the hollow shaft 9 to the first sun gear 401. When the synchronizing device is engaged with the second rotating wheel 11, the power of the power source 5 can pass through the second rotating wheel 11, the synchronizing device 7, and the hollow shaft 9 to the first sun gear 401.

[0103] Embodiment 3

[0104] This embodiment relates to a differential assembly, such as Figure 3 As shown, it has substantially the same structure as the differential assembly of the first embodiment, and the difference mainly lies in the structures of the power source 5 , the second power transmission component, the third power transmission component and the synchronization device 7 .

[0105] In this embodiment, the output shaft of the power source 5 is not a hollow shaft, and the output shaft of the power source 5 is arranged parallel to the shaft body 1 .

[0106] Preferably, a hollow shaft 9 is sleeved on the second half shaft 102, and the second power transmission assembly includes a first driving wheel 1201 provided on the output shaft of the power source 5, and a first driven wheel 1202 provided on the hollow shaft 9, and the first driving wheel 1201 and the first driven wheel 1202 are in driving connection. The third power transmission assembly includes a second driving wheel 1301 provided on the output shaft of the power source 5, and a second driven wheel 1302 provided on the hollow shaft 9, and the second driving wheel 1301 and the second driven wheel 1302 are in driving connection.

[0107] In this embodiment, the first driving wheel 1201 and the second driving wheel 1301 are both fixed on the output shaft of the power source 5, the first driven wheel 1202 and the second driven wheel 1302 are both hollowly sleeved on the hollow shaft 9, the first driving wheel 1201 and the first driven wheel 1202 are meshed and connected, and the second driving wheel 1301 and the second driven wheel 1302 are meshed and connected.

[0108] The hollow shaft 9 is transmission-connected to the first sun gear 401 , and the connection relationship is preferably fixed. The structure of the synchronization device 7 can refer to the existing structure, and it can adopt the existing synchronizer. The synchronization device 7 is arranged on the hollow shaft 9 , and the synchronization device 7 selectively connects to the first driven wheel 1202 or the second driven wheel 1302 .

[0109] Specifically, when the synchronizing device 7 is engaged with the first driven wheel 1202, the power of the power source 5 can be transmitted to the first sun gear 401 through the first driving wheel 1201, the first driven wheel 1202, and the hollow shaft 9. When the synchronizing device 7 is engaged with the second driven wheel 1302, the power of the power source 5 can be transmitted to the first sun gear 401 through the second driving wheel 1301, the second driven wheel 1302, and the hollow shaft 9.

[0110] In a preferred embodiment, the diameter of the first driving wheel 1201 is smaller than the diameter of the second driving wheel 1301. When the synchronizing device 7 is engaged with the first driving wheel 1201 to drive the vehicle, it is suitable for the working condition of low speed and high torque when the vehicle starts. Through one-stage transmission, a large speed ratio of more than 13 can be achieved, the center distance is short, and the structure is compact. When the synchronizing device 7 is engaged with the second driving wheel 1301 to drive the vehicle, it is suitable for the working condition of high speed when the vehicle is running at high speed. Through one-stage transmission, a speed ratio of more than 8 can be achieved.

[0111] It should be noted here that, in other embodiments, the first driving wheel 1201 and the second driving wheel 1301 are both hollowly mounted on the output shaft of the power source 5, the synchronization device 7 can be arranged on the output shaft of the power source 5, the synchronization device 7 selectively connects the first driving wheel 1201 or the second driving wheel 1301, and the first driven wheel 1202 and the second driven wheel 1302 are both fixed on the hollow shaft 9.

[0112] Embodiment 4

[0113] This embodiment relates to a vehicle power system, which includes any one of the differential assemblies in Embodiments 1 to 3.

[0114] Meanwhile, the present embodiment also relates to a vehicle, which is provided with the above vehicle power system. The vehicle and vehicle power system of the present embodiment have the same beneficial effects as the above differential assembly relative to the prior art, which will not be described in detail here.

[0115] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A differential assembly, characterized in that: It comprises an axle body (1), a differential control device (2), a first power transmission component (3), a second power transmission component, a third power transmission component and a synchronization device (7); The shaft body (1) comprises a first semi-shaft (101) and a second semi-shaft (102); The first power transmission component (3) comprises a fixed shaft (301) and a rotating part (302) loosely sleeved on the fixed shaft (301), and the rotating part (302) is drivingly connected to the first half shaft (101); The synchronizing device (7) is selectively connected to the second power transmission component, so that the second power transmission component is in transmission connection with the rotating part (302); or, the synchronizing device (7) is selectively connected to the third power transmission component, so that the third power transmission component is in transmission connection with the rotating part (302); The differential control device (2) comprises a drive device (201), a first torque transmission member (202) and a second torque transmission member (203); the drive device (201) is fixedly arranged relative to the first half-shaft (101), the first torque transmission member (202) is connected to the power output end of the drive device (201), and the second torque transmission member (203) is arranged on the second half-shaft (102); the drive device (201) can drive the first torque transmission member (202) to reciprocate, and the first torque transmission member (202) can engage or disengage with the second torque transmission member (203) to connect or disconnect the first half-shaft (101) and the second half-shaft (102) in a transmission manner.

2. The differential assembly according to claim 1, characterized in that: A transmission wheel (1011) is fixedly provided on the first half shaft (101), and the transmission wheel (1011) is transmission-connected to the rotating part (302); The driving device (201) comprises a linear driving device arranged on the transmission wheel (1011), and the linear driving device drives the first torque transmission member (202) to reciprocate along the axial direction of the shaft body (1); the linear driving device comprises any one of a linear motor, a hydraulic cylinder, a pneumatic cylinder and an electromagnetic driving unit.

3. The differential assembly according to claim 2, characterized in that: The second half shaft (102) is provided with a fourth power transmission assembly; the second power transmission assembly and the third power transmission assembly can be respectively connected to the rotating part (302) by transmission via the fourth power transmission assembly.

4. The differential assembly according to claim 3, characterized in that: The fourth power transmission assembly comprises a first planetary gear train, wherein a first planet carrier (403) of the first planetary gear train is fixedly arranged on the second half shaft (102), and a first ring gear (404) of the first planetary gear train is drivingly connected to the rotating part (302); The first sun gear (401) of the first planetary gear train can be drivingly connected to the second power transmission component or the third power transmission component respectively.

5. The differential assembly according to claim 4, characterized in that: It also includes a power source (5), wherein the output shaft of the power source (5) is loosely sleeved on the second half shaft (102); The second power transmission assembly comprises a second planetary gear train, wherein the second sun gear (801) of the second planetary gear train is drivingly connected to the output shaft of the power source (5); the second ring gear (804) of the second planetary gear train is drivingly connected to the first sun gear (401) of the first planetary gear train; the second planet carrier of the second planetary gear train is drivingly connected to a hollow shaft (9) loosely sleeved on the output shaft of the power source (5), The output shaft of the power source (5) is provided with a first rotating wheel (10), the third power transmission assembly comprises a second rotating wheel (11) provided on the hollow shaft (9), the second rotating wheel (11) is fixedly provided on the housing of the differential assembly, the synchronizing device (7) is provided on the hollow shaft (9), and the synchronizing device (7) selectively connects the first rotating wheel (10) or the second rotating wheel (11).

6. The differential assembly according to claim 4, characterized in that: It also includes a power source (5), wherein the output shaft of the power source (5) is loosely sleeved on the second half shaft (102); The second power transmission assembly comprises a second planetary gear train, wherein a second sun gear (801) of the second planetary gear train is arranged on an output shaft of the power source (5); A first rotating wheel (10) is provided on the second planetary carrier (803) of the second planetary gear train, and the third power transmission assembly comprises a second rotating wheel (11) provided on the output shaft of the power source (5); The first sun gear (401) of the first planetary gear train is drivingly connected to a hollow shaft (9), the synchronizing device (7) is arranged on the hollow shaft (9), and the synchronizing device (7) is selectively connected to the first rotating wheel (10) or the second rotating wheel (11).

7. The differential assembly according to claim 4, characterized in that: It also includes a hollow shaft (9) sleeved on the second half shaft (102) and a power source (5); The second power transmission assembly comprises a first driving wheel (1201) arranged on the output shaft of the power source (5), and a first driven wheel (1202) arranged on the hollow shaft (9), the first driving wheel (1201) and the first driven wheel (1202) being in transmission connection; The third power transmission assembly comprises a second driving wheel (1301) arranged on the output shaft of the power source (5), and a second driven wheel (1302) arranged on the hollow shaft (9), the second driving wheel (1301) and the second driven wheel (1302) being in transmission connection; The hollow shaft (9) is drivingly connected to the first sun gear (401) of the first planetary gear train, the synchronizing device (7) is arranged on the hollow shaft (9), and the synchronizing device (7) selectively connects to the first driven wheel (1202) or the second driven wheel (1302).

8. The differential assembly according to any one of claims 1 to 7, characterized in that: The first power transmission components are divided into two groups, and the two groups of the first power transmission components are respectively arranged on both sides of the shaft body (1).

9. A vehicle power system, characterized in that: The vehicle power system includes the differential assembly according to any one of claims 1-8.

10. A vehicle, characterized in that: The vehicle is provided with the vehicle power system according to claim 9.

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