Driving system

Abstract

The utility model provides a driving system. Through the scheme that a plurality of high-speed motors are adopted at a single-side wheel end for coupling speed change, higher dynamic property is provided when a vehicle is fully loaded, and high-power support is realized when the vehicle is at a high speed; by adopting a plurality of high-speed motors, compared with a single large motor generally adopted in an electric wheel mine truck, more space is saved, and the cost can also be reduced; through the coordinated action of the power units on the two sides, the working modes such as power interruption in the gear shifting process and power non-interruption in the gear shifting process are effectively achieved, the working modes are multiple, and the application range is wide; the multiple power units and the middle shaft are symmetrically arranged, so that the overall load of the driving system is uniform, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of multi-power source vehicle drive systems, and in particular relates to a drive system. Background Art

[0002] At present, electric wheel mining vehicles of 200 tons and above use a large motor and multi-stage reduction on both sides of the rear axle to achieve power drive. In the limited space, the power torque of the conventional single motor is limited. Electric wheel mining vehicles have low climbing ability and climbing speed during mine operation, and low operating efficiency. Now new requirements are put forward for heavy-load climbing and high speed under heavy load, so a new system is needed to meet the power requirements. Utility Model Content

[0003] In order to solve the defects and shortcomings in the prior art, the utility model provides a driving system.

[0004] The technical solution provided by the utility model is as follows:

[0005] A drive system, characterized in that: the drive system comprises

[0006] a first power unit, wherein an output shaft of the first power unit is connected to a first intermediate shaft via a first input gear pair;

[0007] a second power unit, wherein the output shaft of the second power unit is connected to the second intermediate shaft via a second input gear pair;

[0008] a third power unit, wherein the output shaft of the third power unit is connected to the third intermediate shaft via a third input gear pair;

[0009] a fourth power unit, wherein the output shaft of the fourth power unit is connected to the fourth intermediate shaft via a fourth input gear pair;

[0010] a first intermediate shaft and a second intermediate shaft, wherein the first intermediate shaft and the second intermediate shaft are connected to the first output shaft through a first intermediate gear pair respectively;

[0011] a third intermediate shaft and a fourth intermediate shaft, wherein the third intermediate shaft and the fourth intermediate shaft are connected to the second output shaft via a second intermediate gear pair respectively;

[0012] A first shifting device, the first shifting device is disposed on the first output shaft and is located between the first intermediate gear pairs on both sides, so as to selectively engage with the first intermediate gear pairs on both sides or be located in a neutral position;

[0013] A second shifting device, the second shifting device is disposed on the second output shaft and is located between the second intermediate gear pairs on both sides, so as to selectively engage with the second intermediate gear pairs on both sides or be located in a neutral position;

[0014] The first output shaft and the second output shaft are coaxially arranged and can be selectively engaged or disconnected with each other;

[0015] The first output shaft is connected to the wheel on one side through a first wheel-side reduction device, and the second output shaft is connected to the wheel on the other side through a second wheel-side reduction device.

[0016] As a further preferred embodiment of the present utility model, the first power unit, the second power unit, the third power unit and the fourth power unit are selected from a single motor, or a combination of multiple motors, and the motors are all high-speed motors.

[0017] As a further preferred embodiment of the present invention,

[0018] The first input gear pair comprises a first input driving gear and a first input driven gear which are meshed with each other, the first input driving gear is fixedly connected to the output shaft of the first power unit, and the first input driven gear is fixedly connected to the first intermediate shaft;

[0019] The second input gear pair comprises a second input driving gear and a second input driven gear which are meshed with each other, the second input driving gear is fixedly connected to the output shaft of the second power unit, and the second input driven gear is fixedly connected to the second intermediate shaft;

[0020] The third input gear pair comprises a third input driving gear and a third input driven gear that are meshed with each other, the third input driving gear is fixedly connected to the output shaft of the third power unit, and the third input driven gear is fixedly connected to the third intermediate shaft;

[0021] The fourth input gear pair includes a fourth input driving gear and a fourth input driven gear that are meshed with each other. The fourth input driving gear is fixedly connected to the output shaft of the fourth power unit, and the fourth input driven gear is fixedly connected to the fourth intermediate shaft.

[0022] As a further preferred embodiment of the present invention,

[0023] The first intermediate gear pair includes a first gear pair and a second gear pair, wherein:

[0024] The first gear pair comprises a first driving gear fixedly connected to the first intermediate shaft, a first second driving gear fixedly connected to the second intermediate shaft, and a first driven gear movably sleeved with the first output shaft, the first first driving gear and the first second driving gear respectively mesh with the first driven gear;

[0025] The second gear pair comprises a second first driving gear fixedly connected to the first intermediate shaft, a second second driving gear fixedly connected to the second intermediate shaft, and a second driven gear movably sleeved to the first output shaft, the second first driving gear and the second second driving gear respectively meshing with the second driven gear;

[0026] The second intermediate gear pair includes a third gear pair and a fourth gear pair, wherein:

[0027] The third gear pair comprises a third first driving gear fixedly connected to the third intermediate shaft, a third second driving gear fixedly connected to the fourth intermediate shaft, and a third driven gear movably sleeved with the second output shaft, and the third first driving gear and the third second driving gear are respectively meshed with the third driven gear;

[0028] The fourth gear pair includes a fourth first driving gear fixedly connected to the third intermediate shaft, a fourth second driving gear fixedly connected to the fourth intermediate shaft, and a fourth driven gear movably sleeved with the second output shaft, and the fourth first driving gear and the fourth second driving gear are respectively meshed with the fourth driven gear.

[0029] As a further preferred embodiment of the present invention,

[0030] The first shifting device is disposed on the first output shaft and is located between the first driven gear and the second driven gear to selectively engage with the first driven gear and the second driven gear or be located in a neutral position;

[0031] The second shift device is disposed on the second output shaft and is located between the third driven gear and the fourth driven gear to selectively engage with the third driven gear and the fourth driven gear or be located in a neutral position.

[0032] As a further preferred embodiment of the present invention,

[0033] The first wheel-side reduction device and the second wheel-side reduction device both use planetary gear pairs, and the planetary gear pairs include double-row planetary pairs; wherein,

[0034] The inner row planetary pair comprises a first sun gear, a first planetary gear located at the outer periphery of the first sun gear and meshing with the outer portion thereof, a first planetary carrier fixedly connected to the first planetary gear, and a first ring gear located at the outer periphery of the first planetary gear and fixedly connected to the outer portion;

[0035] The outer planetary pair includes a second sun gear, a second planetary gear located at the outer periphery of the second sun gear and meshing with the outer portion thereof, a second planet carrier fixedly connected to the second planetary gear, and a second ring gear located at the outer periphery of the second planetary gear and fixedly connected to the outside;

[0036] The first sun gear is fixedly connected to the first output shaft or the second output shaft; the first planet carrier is fixedly connected to the second sun gear, and the second planet carrier is fixedly connected to one side or the other side of the wheel.

[0037] As a further preferred embodiment of the present invention, a locking device is further included, and the locking device is arranged between the first output shaft and the second output shaft to achieve mutual engagement or disconnection of the first output shaft and the second output shaft.

[0038] As a further preferred embodiment of the present utility model, the end of the second intermediate shaft away from the second power unit is connected to a power take-off; the end of the fourth intermediate shaft away from the fourth power unit is connected to a mechanical steering pump; and the power units of the drive system are signal-connected to the power take-off controller, the vehicle controller unit, the speed controller and the locking controller.

[0039] As a further preferred embodiment of the present invention,

[0040] The first power unit and the second power unit are symmetrically arranged on both sides of the first output shaft, and the third power unit and the fourth power unit are symmetrically arranged on both sides of the second output shaft;

[0041] The first intermediate shaft and the second intermediate shaft are symmetrically arranged on both sides of the first output shaft, and the third intermediate shaft and the fourth intermediate shaft are symmetrically arranged on both sides of the second output shaft.

[0042] As a further preferred embodiment of the present utility model, the drive system can realize the following working modes:

[0043] 1) Power interruption mode:

[0044] When the vehicle is in the forward gear, the locking device is disconnected, the first shifting device is engaged with the gear of the first gear pair on one side, and the second shifting device is engaged with the gear of the third gear pair on one side;

[0045] When the motor reaches a preset speed, the first shift device is coupled with the gear of the second gear pair on the other side, and the second shift device is coupled with the gear of the fourth gear pair on the other side;

[0046] 2) Power uninterrupted mode:

[0047] When the vehicle is in the forward gear, the locking device is engaged, the first shifting device is engaged with the gear of the first gear pair on one side, and the second shifting device is engaged with the gear of the third gear pair on one side;

[0048] When the motor reaches a preset speed, the first shift device is coupled with the gear of the second gear pair on the other side, the second shift device is coupled with the gear of the fourth gear pair on the other side, and then the locking device is disconnected.

[0049] Compared with the prior art, the beneficial effects achieved by the utility model include:

[0050] 1) The utility model provides a drive system, which provides higher power when the vehicle is fully loaded and realizes high-power support when the vehicle is at high speed by adopting a scheme of coupling and changing speed of multiple high-speed motors at a single wheel end.

[0051] 2) The utility model provides a driving system which uses a plurality of high-speed motors, thereby saving more space and reducing costs than the single large motor commonly used in electric wheel mining vehicles.

[0052] 3) The utility model provides a driving system which, through the coordinated actions of the power units on both sides, effectively realizes working modes such as power interruption during gear shifting and power non-interruption during gear shifting. It has multiple working modes and a wide range of applications.

[0053] 4) The utility model provides a drive system in which multiple power units and intermediate shafts are arranged symmetrically, so that the overall load of the drive system is uniform and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a gear structure diagram of the drive system provided by the utility model.

[0055] Figure 2 This is a control logic diagram of the drive system provided by the utility model. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0057] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 according to specific circumstances.

[0059] [First embodiment]

[0060] like Figure 1 The first embodiment of the present invention provides a driving system, which includes

[0061] A first power unit E1, the output shaft of the first power unit E1 is connected to the first intermediate shaft S1 through a first input gear pair; wherein the first input gear pair comprises a first input driving gear G11 and a first input driven gear G12 that are meshed with each other, the first input driving gear G11 is fixedly connected to the output shaft of the first power unit E1, and the first input driven gear G12 is fixedly connected to the first intermediate shaft S1; the output power of the first power unit E1 is transmitted to the first intermediate shaft S1 through the first input driving gear G11 and the first input driven gear G12 that are meshed with each other;

[0062] The second power unit E2, the output shaft of the second power unit E2 is connected to the second intermediate shaft S2 through a second input gear pair; wherein the second input gear pair includes a second input driving gear G21 and a second input driven gear G22 that are meshed with each other, the second input driving gear G21 is fixedly connected to the output shaft of the second power unit E2, and the second input driven gear G22 is fixedly connected to the second intermediate shaft S2; the output power of the second power unit E2 is transmitted to the second intermediate shaft S2 through the second input driving gear G21 and the second input driven gear G22 that are meshed with each other;

[0063] The third power unit E3, the output shaft of the third power unit E3 is connected to the third intermediate shaft S3 through the third input gear pair; wherein the third input gear pair includes a third input driving gear G31 and a third input driven gear G32 that are meshed with each other, the third input driving gear G31 is fixedly connected to the output shaft of the third power unit E3, and the third input driven gear G32 is fixedly connected to the third intermediate shaft S3; the output power of the third power unit E3 is transmitted to the third intermediate shaft S3 through the third input driving gear G31 and the third input driven gear G32 that are meshed with each other;

[0064] A fourth power unit E4, the output shaft of the fourth power unit E4 is connected to the fourth intermediate shaft S4 through a fourth input gear pair; wherein the fourth input gear pair comprises a fourth input driving gear G41 and a fourth input driven gear G42 that are meshed with each other, the fourth input driving gear G41 is fixedly connected to the output shaft of the fourth power unit E4, and the fourth input driven gear G42 is fixedly connected to the fourth intermediate shaft S4; the output power of the fourth power unit E4 is transmitted to the fourth intermediate shaft S4 through the fourth input driving gear G41 and the fourth input driven gear G42 that are meshed with each other;

[0065] In this embodiment, the first power unit E1, the second power unit E2, the third power unit E3 and the fourth power unit E4 use a single motor, or a combination of multiple motors to meet different power drive requirements, and the motors are all high-speed motors, which saves more space and reduces costs than the single large motor commonly used in electric wheel mining vehicles.

[0066] like Figure 1 As shown, in this embodiment,

[0067] The first power unit E1 and the second power unit E2 are symmetrically arranged on both sides of the first output shaft, and the third power unit E3 and the fourth power unit E4 are symmetrically arranged on both sides of the second output shaft. The symmetrical arrangement of multiple power units makes the overall load of the drive system uniform, thereby extending the service life.

[0068] The drive system also includes

[0069] The first intermediate shaft S1 and the second intermediate shaft S2 are connected to the first output shaft S5 through the first intermediate gear pair respectively; the power on the first intermediate shaft S1 and the second intermediate shaft S2 can be transmitted to the first output shaft S5 through the first intermediate gear pair;

[0070] In this embodiment, the first intermediate gear pair includes a first gear pair and a second gear pair, wherein:

[0071] The first gear pair includes a first driving gear G51 fixedly connected to the first intermediate shaft S1, a first second driving gear G52 fixedly connected to the second intermediate shaft S2, and a first driven gear G53 movably sleeved to the first output shaft S5, the first driving gear G51 and the first second driving gear G52 respectively mesh with the first driven gear G53;

[0072] The second gear pair includes a second first driving gear G61 fixedly connected to the first intermediate shaft S1, a second second driving gear G62 fixedly connected to the second intermediate shaft S2, and a second driven gear G63 movably sleeved to the first output shaft S5, the second first driving gear G61 and the second second driving gear G62 respectively meshing with the second driven gear G63;

[0073] The third intermediate shaft S3 and the fourth intermediate shaft S4 are connected to the second output shaft S6 through the second intermediate gear pair respectively; the power on the third intermediate shaft S3 and the fourth intermediate shaft S4 can be transmitted to the second output shaft S6 through the second intermediate gear pair;

[0074] In this embodiment, the second intermediate gear pair includes a third gear pair and a fourth gear pair, wherein:

[0075] The third gear pair includes a third-first driving gear G71 fixedly connected to the third intermediate shaft S3, a third-second driving gear G72 fixedly connected to the fourth intermediate shaft S4, and a third driven gear G73 movably sleeved to the second output shaft S6, and the third-first driving gear G71 and the third-second driving gear G72 are respectively meshed with the third driven gear G73;

[0076] The fourth gear pair includes a fourth-first driving gear G81 fixedly connected to the third intermediate shaft S3, a fourth-second driving gear G82 fixedly connected to the fourth intermediate shaft S4, and a fourth driven gear G73 movably connected to the second output shaft S6. The fourth-first driving gear G81 and the fourth-second driving gear G82 are respectively meshed with the fourth driven gear G83.

[0077] like Figure 1 As shown, the first intermediate shaft S1 and the second intermediate shaft S2 are symmetrically arranged on both sides of the first output shaft, and the third intermediate shaft S3 and the fourth intermediate shaft S4 are symmetrically arranged on both sides of the second output shaft; the symmetrical arrangement is achieved by multiple intermediate shafts, so that the overall load of the drive system is uniform and the service life is extended.

[0078] In this embodiment, a first shifting device L1 and a second shifting device L2 are further provided, and their specific locations are:

[0079] The first shift device L1 is disposed on the first output shaft S5 and is located between the first driven gear and the second driven gear to selectively engage with the first driven gear and the second driven gear or be located in a neutral position;

[0080] The second shift device L2 is disposed on the second output shaft S6 and is located between the third driven gear and the fourth driven gear to selectively engage with the third driven gear and the fourth driven gear or be located in a neutral position;

[0081] like Figure 1As shown, the first output shaft S5 is connected to the wheel on one side through a first wheel-side reduction device, and the second output shaft S6 is connected to the wheel on the other side through a second wheel-side reduction device; and the first output shaft S5 and the second output shaft S6 are coaxially arranged and can selectively engage or disconnect with each other; a locking device S is provided between the first output shaft S5 and the second output shaft S6, and the locking device S is used to realize the mutual engagement or disconnection of the first output shaft S5 and the second output shaft S6.

[0082] like Figure 1 As shown, in this embodiment, the first wheel-side reduction device and the second wheel-side reduction device both use planetary gear pairs, and the planetary gear pairs include double-row planetary pairs to achieve the effect of reducing speed and increasing torque; wherein,

[0083] The inner row planetary pair includes a first sun gear, a first planetary gear located at the outer periphery of the first sun gear and meshing with the outer portion thereof, a first planetary carrier fixedly connected to the first planetary gear, and a first ring gear located at the outer periphery of the first planetary gear and fixedly connected to the outer portion;

[0084] The outer row planetary pair includes a second sun gear, a second planetary gear located at the outer periphery of the second sun gear and meshing with the outer portion thereof, a second planetary carrier fixedly connected to the second planetary gear, and a second ring gear located at the outer periphery of the second planetary gear and fixedly connected to the outside;

[0085] The first sun gear is fixedly connected to the first output shaft or the second output shaft; the first planet carrier is fixedly connected to the second sun gear, and the second planet carrier is fixedly connected to one side or the other side of the wheel; the power of the first output shaft and the second output shaft is sequentially input into the inner row of planetary pairs through the first sun gear, and then transmitted to the outer row of planetary pairs through the connection between the first planet carrier and the second sun gear, and finally transmitted to the wheels on both sides through the second planet carrier.

[0086] like Figure 1 As shown, a power take-off is connected to one end of the second intermediate shaft S2 away from the second power unit E2; a mechanical steering pump is connected to one end of the fourth intermediate shaft S4 away from the fourth power unit E4; the power take-off F is used for unloading power from the shelf, and the mechanical steering pump G is used as a backup mechanical steering pump for the vehicle. Figure 2 As shown, each power unit of the drive system in this embodiment is connected with the power take-off controller, the vehicle controller unit, the speed controller and the locking controller by signal, so that corresponding control signals are sent to the power take-off controller, the vehicle controller unit, the speed controller and the locking controller according to the vehicle state and the driver's driving needs to control the vehicle to perform corresponding actions.

[0087] The drive system provided in this embodiment can realize the following working modes: (In the default initial state, the first shift device L1 and the second shift device L2 are in the neutral position)

[0088] 1) Power interruption mode:

[0089] When the vehicle is in the forward gear, the locking device is disconnected, and when the vehicle controller unit V receives the driver's throttle signal, the vehicle controller unit V controls the first shift device to engage with the gear of the first gear pair on one side through the speed controller T ( Figure 1 The second shifting device is combined with the gear of the third gear pair on one side ( Figure 1 At this time, the power units E1, E2, E3, and E4 simultaneously output torque to the left and right wheels to achieve the starting effect;

[0090] When the motor reaches a preset speed (X% of the peak speed, X is 0-100), the vehicle controller unit V controls the first shift device to engage with the gear of the second gear pair on the other side through the speed controller T ( Figure 1 The second shifting device is combined with the gear of the fourth gear pair on the other side ( Figure 1 to the left) to enter high-speed operation mode;

[0091] The reverse gear is the same as above;

[0092] 2) Power uninterrupted mode:

[0093] When the vehicle is in the forward gear, the locking device is engaged, and when the vehicle controller unit V receives the throttle signal, the vehicle controller unit V controls the first shift device to engage with the gear of the first gear pair on one side through the speed controller T ( Figure 1 The second shifting device is combined with the gear of the third gear pair on one side ( Figure 1 At this time, the power units E1, E2, E3, and E4 simultaneously output torque to the left and right wheels to achieve the starting effect;

[0094] When the motor reaches the preset speed (X% of the peak speed, X is 0-100, and the vehicle speed is less than 10km / h), the first power unit E1 and the second power unit E2 clear the torque, the third power unit E3 and the fourth power unit E4 compensate for the torque of the first power unit E1 and the second power unit E2, and the first shift device is combined with the gear of the second gear pair on the other side ( Figure 1 The third power unit E3 and the fourth power unit E4 clear the torque, the first power unit E1 and the second power unit compensate the torque of the third power unit E3 and the fourth power unit, and the second shifting device is combined with the gear of the fourth gear pair on the other side ( Figure 1 At this time, the vehicle controller unit V controls the power units E1, E2 and E3, E4 to output the same torque according to the vehicle's power requirements, and then the locking device is disconnected to enter the high-speed operation mode.

[0095] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A drive system, characterized in that: The drive system includes A first power unit (E1), wherein an output shaft of the first power unit (E1) is connected to a first intermediate shaft (S1) via a first input gear pair; A second power unit (E2), wherein an output shaft of the second power unit (E2) is connected to a second intermediate shaft (S2) via a second input gear pair; A third power unit (E3), wherein the output shaft of the third power unit (E3) is connected to the third intermediate shaft (S3) via a third input gear pair; A fourth power unit (E4), wherein the output shaft of the fourth power unit (E4) is connected to a fourth intermediate shaft (S4) via a fourth input gear pair; A first intermediate shaft (S1) and a second intermediate shaft (S2), wherein the first intermediate shaft (S1) and the second intermediate shaft (S2) are connected to a first output shaft (S5) via a first intermediate gear pair respectively; a third intermediate shaft (S3) and a fourth intermediate shaft (S4), wherein the third intermediate shaft (S3) and the fourth intermediate shaft (S4) are respectively connected to the second output shaft (S6) via a second intermediate gear pair; A first shifting device (L1), the first shifting device (L1) being arranged on the first output shaft (S5) and being located between the first intermediate gear pairs on both sides, so as to selectively engage with the first intermediate gear pairs on both sides or be located in a neutral position; A second shifting device (L2), the second shifting device (L2) being arranged on the second output shaft (S6) and being located between the second intermediate gear pairs on both sides, so as to selectively engage with the second intermediate gear pairs on both sides or be located in a neutral position; The first output shaft (S5) and the second output shaft (S6) are coaxially arranged and can be selectively engaged or disconnected with each other; The first output shaft (S5) is connected to a wheel on one side via a first wheel-side reduction device, and the second output shaft (S6) is connected to a wheel on the other side via a second wheel-side reduction device.

2. A driving system according to claim 1, characterized in that: The first power unit (E1), the second power unit (E2), the third power unit (E3) and the fourth power unit (E4) are each a single motor or a combination of multiple motors, and all of the motors are high-speed motors.

3. A driving system according to claim 1, characterized in that: The first input gear pair comprises a first input driving gear (G11) and a first input driven gear (G12) that are meshed with each other, the first input driving gear (G11) is fixedly connected to the output shaft of the first power unit (E1), and the first input driven gear (G12) is fixedly connected to the first intermediate shaft (S1); The second input gear pair comprises a second input driving gear (G21) and a second input driven gear (G22) which are meshed with each other, the second input driving gear (G21) is fixedly connected to the output shaft of the second power unit (E2), and the second input driven gear (G22) is fixedly connected to the second intermediate shaft (S2); The third input gear pair comprises a third input driving gear (G31) and a third input driven gear (G32) which are meshed with each other, the third input driving gear (G31) is fixedly connected to the output shaft of the third power unit (E3), and the third input driven gear (G32) is fixedly connected to the third intermediate shaft (S3); The fourth input gear pair comprises a fourth input driving gear (G41) and a fourth input driven gear (G42) which are meshed with each other. The fourth input driving gear (G41) is fixedly connected to the output shaft of the fourth power unit (E4), and the fourth input driven gear (G42) is fixedly connected to the fourth intermediate shaft (S4).

4. A driving system according to claim 1, characterized in that: The first intermediate gear pair includes a first gear pair and a second gear pair, wherein: The first gear pair comprises a first driving gear (G51) fixedly connected to the first intermediate shaft (S1), a first second driving gear (G52) fixedly connected to the second intermediate shaft (S2), and a first driven gear (G53) movably sleeved to the first output shaft (S5), the first driving gear (G51) and the first second driving gear (G52) respectively meshing with the first driven gear (G53); The second gear pair comprises a second first driving gear (G61) fixedly connected to the first intermediate shaft (S1), a second second driving gear (G62) fixedly connected to the second intermediate shaft (S2), and a second driven gear (G63) movably sleeved to the first output shaft (S5), the second first driving gear (G61) and the second second driving gear (G62) respectively meshing with the second driven gear (G63); The second intermediate gear pair includes a third gear pair and a fourth gear pair, wherein: The third gear pair comprises a third first driving gear (G71) fixedly connected to the third intermediate shaft (S3), a third second driving gear (G72) fixedly connected to the fourth intermediate shaft (S4), and a third driven gear (G73) movably sleeved with the second output shaft (S6), the third first driving gear (G71) and the third second driving gear (G72) respectively meshing with the third driven gear (G73); The fourth gear pair comprises a fourth first driving gear (G81) fixedly connected to the third intermediate shaft (S3), a fourth second driving gear (G82) fixedly connected to the fourth intermediate shaft (S4), and a fourth driven gear (G83) movably sleeved with the second output shaft (S6); the fourth first driving gear (G81) and the fourth second driving gear (G82) are respectively meshed with the fourth driven gear (G83).

5. A driving system according to claim 4, characterized in that: The first shift device (L1) is arranged on the first output shaft (S5) and is located between the first driven gear and the second driven gear, so as to selectively engage with the first driven gear and the second driven gear or be located in a neutral position; The second shift device (L2) is disposed on the second output shaft (S6) and is located between the third driven gear and the fourth driven gear to selectively engage with the third driven gear and the fourth driven gear or to be located in a neutral position.

6. A driving system according to claim 1, characterized in that: The first wheel-side reduction device and the second wheel-side reduction device both use planetary gear pairs, and the planetary gear pairs include double-row planetary pairs; wherein, The inner row planetary pair comprises a first sun gear, a first planetary gear located at the outer periphery of the first sun gear and meshing with the outer portion thereof, a first planetary carrier fixedly connected to the first planetary gear, and a first ring gear located at the outer periphery of the first planetary gear and fixedly connected to the outer portion; The outer planetary pair includes a second sun gear, a second planetary gear located at the outer periphery of the second sun gear and meshing with the outer portion thereof, a second planet carrier fixedly connected to the second planetary gear, and a second ring gear located at the outer periphery of the second planetary gear and fixedly connected to the outside; The first sun gear is fixedly connected to the first output shaft or the second output shaft; the first planet carrier is fixedly connected to the second sun gear, and the second planet carrier is fixedly connected to one side or the other side of the wheel.

7. A driving system according to claim 1, characterized in that: It also includes a locking device (S), which is arranged between the first output shaft (S5) and the second output shaft (S6) to achieve mutual engagement or disconnection of the first output shaft (S5) and the second output shaft (S6).

8. A driving system according to claim 1, characterized in that: The end of the second intermediate shaft (S2) away from the second power unit (E2) is connected to a power take-off; the end of the fourth intermediate shaft (S4) away from the fourth power unit (E4) is connected to a mechanical steering pump; and the power units of the drive system are signal-connected to a power take-off controller, a vehicle controller unit, a speed controller and a locking controller.

9. A driving system according to claim 1, characterized in that: The first power unit (E1) and the second power unit (E2) are symmetrically arranged on both sides of the first output shaft, and the third power unit (E3) and the fourth power unit (E4) are symmetrically arranged on both sides of the second output shaft; The first intermediate shaft (S1) and the second intermediate shaft (S2) are symmetrically arranged on both sides of the first output shaft, and the third intermediate shaft (S3) and the fourth intermediate shaft (S4) are symmetrically arranged on both sides of the second output shaft.

10. A driving system according to claim 1, characterized in that: The drive system can realize the following working modes: 1) Power interruption mode: When the vehicle is in the forward gear, the locking device is disconnected, the first shifting device is engaged with the gear of the first gear pair on one side, and the second shifting device is engaged with the gear of the third gear pair on one side; When the motor reaches a preset speed, the first shift device is coupled with the gear of the second gear pair on the other side, and the second shift device is coupled with the gear of the fourth gear pair on the other side; 2) Power uninterrupted mode: When the vehicle is in the forward gear, the locking device is engaged, the first shifting device is engaged with the gear of the first gear pair on one side, and the second shifting device is engaged with the gear of the third gear pair on one side; When the motor reaches a preset speed, the first shift device is coupled with the gear of the second gear pair on the other side, the second shift device is coupled with the gear of the fourth gear pair on the other side, and then the locking device is disconnected.

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