Dual-motor driving system assembly suitable for heavy truck

Abstract

The utility model discloses a dual-motor driving system assembly suitable for a heavy truck, which comprises a wheel hub arranged on a vehicle, the wheel hub is driven by a corresponding driving system arranged on the vehicle, the driving system at least comprises a main motor and an auxiliary motor which are arranged up and down, the main motor and the auxiliary motor are arranged in the same direction, and the main motor is connected with the auxiliary motor. A first planet row is fixedly arranged on a motor shaft, the output end of the planet row is in transmission connection with an output shaft through a transmission assembly, a second planet row is fixedly arranged on the end side of the output shaft, and the output end of the second planet row is connected to the hub. The utility model has the beneficial effects that the structure is compact, the function characteristic of independent output of the left road and the right road is adopted, the independent driving of the left road and the right road is realized, the power formation of the whole vehicle is improved, and the differential control of the left wheel and the right wheel of the whole vehicle is realized. In addition, the system assembly replaces a complex differential mechanism structure, the structure of a power system is simplified, overall layout is facilitated, and the system assembly has wide applicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox drive technical field, specifically, especially, a kind of dual-motor drive system assembly suitable for heavy truck. BACKGROUND

[0002] Nowadays, new energy vehicles have become the development direction of future transportation tools, the purpose is to replace the traditional petrochemical energy power with new energy power, so as to solve the problem of earth environmental pollution and petrochemical resources depletion. As one of the typical representatives of new energy vehicles, pure electric vehicles have also been known by the majority of consumers, and with the maturity of power lithium battery technology, the number of pure electric vehicles on the market is also increasing.

[0003] As the authorized announcement No.CN208381237U discloses a kind of pure electric vehicle's dual-motor drive axle box, wherein, driving gear is fixed on input shaft, motor is connected with input shaft and provides power, driven gear is empty set on intermediate shaft, synchronizer can move driven gear connection left and right, main reduction driving gear is fixedly connected with intermediate shaft, motor output power is transmitted to differential through main reduction driven gear, left half shaft and right half shaft are connected with differential through spline respectively. However, the power performance of the above-mentioned axle box is limited by the output power of motor, and the vehicle power performance is difficult to improve, and it is increasingly unable to meet the power demand of electric vehicle. At the same time, the mechanical differential structure is complex, and the integration degree of power assembly is low, which increases the weight of vehicle. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiencies in prior art, provide a kind of dual-motor drive system assembly suitable for heavy truck.

[0005] The utility model aims at overcoming the deficiencies in prior art, provide a kind of dual-motor drive system assembly suitable for heavy truck.

[0006] A kind of dual-motor drive system assembly suitable for heavy truck, including the wheel hub being set on vehicle, the wheel hub is driven by corresponding ground drive system being set on vehicle, the drive system at least includes upper and lower division's main motor and auxiliary motor, the main motor and auxiliary motor are arranged in the same direction, and its motor shaft is fixedly set with a first planetary row, the output end of the planetary row is connected with output shaft by transmission assembly, the end side of the output shaft is fixedly set with second planetary row, the output end of the second planetary row is connected to the wheel hub.

[0007] Preferably, the transmission assembly is provided with a first input shaft and a second input shaft on both sides of the output shaft and fixedly arranged on the first planetary gear set output end, a one-gear driving gear and a two-gear driving gear are arranged on the first input shaft, a first synchronizer is arranged between the one-gear driving gear and the two-gear driving gear, the first synchronizer is selectively coupled with the one-gear driving gear or the two-gear driving gear, a transmission gear is fixedly arranged on the second input shaft, a one-gear driven gear and a two-gear driven gear are fixedly arranged on the output shaft, the one-gear driven gear is engaged with the one-gear driving gear, and the two-gear driven gear is engaged with the two-gear driving gear and the transmission gear.

[0008] Preferably, the transmission assembly is provided with a first input shaft and a second input shaft on both sides of the output shaft and fixedly arranged on the first planetary gear set output end, a one-gear driving gear and a two-gear driving gear are arranged on the first input shaft, a first synchronizer is arranged between the one-gear driving gear and the two-gear driving gear, the first synchronizer is selectively coupled with the one-gear driving gear or the two-gear driving gear, a one-gear driving gear and a two-gear driving gear are fixedly arranged on the second input shaft, a second synchronizer is arranged between the one-gear driving gear and the two-gear driving gear, the second synchronizer is selectively coupled with the one-gear driving gear or the two-gear driving gear, a one-gear driven gear and a two-gear driven gear are fixedly arranged on the output shaft, the one-gear driven gear is engaged with the one-gear driving gear and the one-gear driving gear, and the two-gear driven gear is engaged with the two-gear driving gear and the two-gear driving gear.

[0009] Preferably, the second planetary gear set includes a second planetary carrier connected with the wheel hub and a second planetary gear arranged on the second planetary carrier, the second planetary gear is located between the second sun gear and the second ring gear and engaged with both, the second sun gear is fixedly arranged on the output shaft, and the second ring gear is fixedly arranged on the transmission housing.

[0010] Preferably, the first planetary gear set includes a first planetary carrier arranged on the transmission housing and a first planetary gear arranged on the first planetary carrier, the first planetary gear is located between the first sun gear and the first ring gear and engaged with both, the first sun gear is fixedly arranged on the motor shaft of the main motor and the auxiliary motor, and the first ring gear is fixedly arranged on the first input shaft and the second input shaft.

[0011] Preferably, the first input shaft and the second input shaft are arranged in parallel with the output shaft, and the output shaft is located in the middle of the first input shaft and the second input shaft.

[0012] Preferably, the main motor and the auxiliary motor are direct-current high-speed motors.

[0013] The utility model discloses beneficial effect mainly shows in:

[0014] 1, compact structure, first planetary row can make this system assembly have greater transmission ratio, realize power performance greatly promote, also can reduce the volume and weight of system assembly, make the layout more compact, reduce the space occupied.

[0015] 2, through the main motor and auxiliary motor cooperation can provide greater pure EV drive power, and can reduce the main motor and auxiliary motor power and then reduce the space requirement and cost pressure.

[0016] 3, the output shaft is set in the middle of first input shaft and second input shaft, can reduce the radial space occupied of this system assembly, make the layout more reasonable. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model discloses technical scheme further describes below in conjunction with the drawing:

[0018] Fig. 1 : the structure schematic diagram of the first preferred embodiment of the utility model;

[0019] Fig. 2 : the structure schematic diagram of the second preferred embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model will be described in detail below in conjunction with the specific implementation of the drawing shown in the utility model. But these implementation ways are not limited to the utility model, the conversion of the structure, method or function that the ordinary skill in the art makes according to these implementation ways is included in the protection scope of the utility model.

[0021] The utility model will be described in detail below in conjunction with the specific implementation of the drawing shown in the utility model.

[0022] As Figs. 1-2 Shown, the utility model discloses a kind of double motor drive system assembly suitable for heavy truck, including being set on wheel hub 1 of vehicle, the wheel hub 1 is driven by corresponding drive system set on vehicle, the drive system can be symmetrically set on the front drive of the vehicle, also can be set on the front drive of the vehicle, of course, also can be set on the front drive and rear drive of the vehicle, all belong to the protection scope of the utility model, do not make too much repetition here.

[0023] The drive system includes at least a main motor 2 and an auxiliary motor 3, which are positioned vertically. The main motor 2 and auxiliary motor 3 are high-speed DC motors, capable of matching the power and torque requirements of the vehicle. Of course, the main motor 2 and auxiliary motor 3 can also be flat motors, etc., all falling within the scope of this utility model and will not be elaborated further here. In the above description, the main motor 2 and auxiliary motor 3 are arranged in the same direction, and each has a first planetary gear set 4 fixedly mounted on its motor shaft. The output end of the planetary gear set 4 is connected to the output shaft 6 via a transmission assembly 5. A second planetary gear set 7 is fixedly mounted on the end side of the output shaft 6, and the output end of the second planetary gear set 7 is connected to the hub 1. The first input shaft 51 and the second input shaft 52 are arranged parallel to the output shaft 6, with the output shaft 6 positioned directly in the middle of the first input shaft 51 and the second input shaft 52. This structure is compact. The first planetary gear set allows the system assembly to have a large transmission ratio, significantly improving power performance, while also reducing the size and weight of the system assembly, resulting in a more compact layout and reduced space occupation. Furthermore, the second planetary gear set replaces the complex differential structure, simplifying the powertrain structure, facilitating overall layout, and offering wider applicability. Additionally, the output shaft 6 is positioned precisely between the first input shaft 51 and the second input shaft 52, reducing the radial space occupied by the system assembly and resulting in a more rational layout.

[0024] In this preferred embodiment, the second planetary gear set 7 includes a second planetary carrier 74 connected to the hub 1 and a second planetary gear 73 disposed on the second planetary carrier 74. The second planetary gear 73 is located between and meshes with the second sun gear 71 and the second ring gear 72. The second sun gear 71 is fixed on the output shaft 6, and the second ring gear 72 is fixed on the gearbox housing. The first planetary gear set allows the system assembly to have a large transmission ratio, which can reduce the size and weight of the system assembly, making the layout more compact and reducing the space occupied. In this preferred embodiment, the first planetary gear set 4 includes a first planetary carrier 44 disposed on the gearbox housing and a first planetary gear 43 disposed on the first planetary carrier 44. The first planetary gear 43 is located between and meshes with the first sun gear 41 and the first ring gear 42. The first sun gear 41 is fixedly disposed on the motor shafts of the main motor 2 and the auxiliary motor 3, and the first ring gear 42 is fixedly disposed on the first input shaft 51 and the second input shaft 52. The arrangement of the second planetary gear set 7 can further increase the transmission ratio of the system assembly, thereby minimizing the size and weight of the system assembly and making the layout more reasonable and compact.

[0025] like Fig. 1As shown in the first preferred embodiment of this utility model, the transmission assembly 5 is at least disposed on both sides of the output shaft 6 and fixedly disposed on the first input shaft 51 and the second input shaft 52 on the output end of the first planetary gear 4. The first input shaft 51 is loosely fitted with a first-speed driving gear 53 and a second-speed driving gear 54. A first synchronizer 55 is disposed on the first input shaft 51 between the first-speed driving gear 53 and the second-speed driving gear 54. The first synchronizer 55 can be selectively coupled with the first-speed driving gear 53 or the second-speed driving gear 54. A transmission gear 56 is fixedly disposed on the second input shaft 52. A first-speed driven gear 57 and a second-speed driven gear 58 are also fixedly disposed on the output shaft 6. The first-speed driven gear 57 meshes with the first-speed driving gear 53, and the second-speed driven gear 58 meshes with the second-speed driving gear 54 and the transmission gear 56.

[0026] The working process of this first preferred embodiment is briefly described below:

[0027] When the vehicle is in first gear, the main motor 2 starts and transmits power to the wheel hub sequentially through the first sun gear 41, first planetary gear 43, first ring gear 42, first input shaft 51, first synchronizer 55, first gear drive gear 53, first gear driven gear 57, output shaft 6, second sun gear 71, second planetary gear 73, and second planetary carrier 74. Simultaneously, the auxiliary motor can also start and transmit power to the wheel hub sequentially through the first sun gear 41, first planetary gear 43, first ring gear 42, second input shaft 52, transmission gear 56, second gear driven gear 58, output shaft 6, second sun gear 71, second planetary gear 73, and second planetary carrier 74.

[0028] When a gear shift is required, simply move the first synchronizer 55 to the second gear drive gear 54 to complete the shift. This operation is simple and convenient, and the shifting process is stable and reliable. It can avoid power interruption and "jerking" phenomena, thus improving stability and comfort.

[0029] like Fig. 2As shown, in the second preferred embodiment of this utility model, the transmission assembly 5 is at least disposed on both sides of the output shaft 6 and fixedly disposed on the output end of the first planetary gear 4, with a first input shaft 51 and a second input shaft 52. A first-speed drive gear 53 and a second-speed drive gear 54 are loosely fitted on the first input shaft 51. A first synchronizer 55 is disposed on the first input shaft 51 between the first-speed drive gear 53 and the second-speed drive gear 54. The first synchronizer 55 can selectively couple with either the first-speed drive gear 53 or the second-speed drive gear 54. The second input shaft... A first-gear drive gear 59 and a second-gear drive gear 50 are fixedly mounted on the output shaft 6. A second synchronizer 501 is provided between the first-gear drive gear 59 and the second-gear drive gear 50. The second synchronizer 501 can selectively engage with either the first-gear drive gear 59 or the second-gear drive gear 50. A first-gear driven gear 57 and a second-gear driven gear 58 are also fixedly mounted on the output shaft 6. The first-gear driven gear 57 meshes with the first-gear drive gear 53 and the first-gear drive gear 59, and the second-gear driven gear 58 meshes with the second-gear drive gear 54 and the second-gear drive gear 50.

[0030] The working process of this second preferred embodiment is briefly described below:

[0031] When the vehicle is in first gear, the main motor 2 starts, transmitting power to the wheel hub sequentially through the first sun gear 41, first planetary gear 43, first ring gear 42, first input shaft 51, first synchronizer 55, first gear drive gear 53, first gear driven gear 57, output shaft 6, second sun gear 71, second planetary gear 73, and second planetary carrier 74. Simultaneously, the auxiliary motor can also start, transmitting power to the wheel hub sequentially through the first sun gear 41, first planetary gear 43, first ring gear 42, second input shaft 52, second synchronizer 501, first gear drive gear 59, first gear driven gear 57, output shaft 6, second sun gear 71, second planetary gear 73, and second planetary carrier 74.

[0032] When the vehicle needs to shift to second gear, the first synchronizer 55 is coupled with the second gear drive gear 54, and the second synchronizer 501 is coupled with the second gear drive gear 50, thus completing the gear shift.

[0033] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0034] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A dual motor drive system assembly suitable for heavy duty vehicles, comprising a wheel hub (1) provided on the vehicle, characterized in that: The hub (1) is driven by a corresponding driving system arranged on the vehicle, the driving system at least comprising an upper and lower arranged main motor (2) and auxiliary motor (3), the main motor (2) and auxiliary motor (3) are arranged in the same direction, and a first planetary gear train (4) is fixedly arranged on the motor shaft of each of the main motor (2) and auxiliary motor (3), the output end of the planetary gear train (4) is in transmission connection with an output shaft (6) through a transmission assembly (5), and the end side of the output shaft (6) is fixedly provided with a second planetary gear train (7), and the output end of the second planetary gear train (7) is connected to the hub (1).

2. The dual motor drive system assembly suitable for heavy duty truck according to claim 1, characterized in that: The transmission assembly (5) is arranged on the first input shaft (51) and the second input shaft (52) fixedly arranged on the output end of the first planetary gear train (4) at least on both sides of the output shaft (6), a one-gear driving gear (53) and a two-gear driving gear (54) are arranged on the first input shaft (51), a first synchronizer (55) is arranged on the first input shaft (51) between the one-gear driving gear (53) and the two-gear driving gear (54), and the first synchronizer (55) is selectively coupled with the one-gear driving gear (53) or the two-gear driving gear (54); a transmission gear (56) is fixedly arranged on the second input shaft (52), and a one-gear driven gear (57) and a two-gear driven gear (58) are further fixedly arranged on the output shaft (6), the one-gear driven gear (57) is in meshing connection with the one-gear driving gear (53), and the two-gear driven gear (58) is in meshing connection with the two-gear driving gear (54) and the transmission gear (56).

3. The dual motor drive system assembly suitable for heavy duty truck of claim 1, wherein: The transmission assembly (5) is arranged on the first input shaft (51) and the second input shaft (52) fixedly arranged on the output end of the first planetary gear train (4) at least on both sides of the output shaft (6), a one-gear driving gear (53) and a two-gear driving gear (54) are arranged on the first input shaft (51), a first synchronizer (55) is arranged on the first input shaft (51) between the one-gear driving gear (53) and the two-gear driving gear (54), and the first synchronizer (55) is selectively coupled with the one-gear driving gear (53) or the two-gear driving gear (54); a transmission gear (56) is fixedly arranged on the second input shaft (52), and a one-gear driven gear (57) and a two-gear driven gear (58) are further fixedly arranged on the output shaft (6), the one-gear driven gear (57) is in meshing connection with the one-gear driving gear (53), and the two-gear driven gear (58) is in meshing connection with the two-gear driving gear (54) and the transmission gear (56).

4. The dual motor drive system assembly suitable for heavy duty truck according to claim 2 or 3, characterized in that: The second planetary gear train (7) comprises a second carrier (74) connected with the wheel hub (1) and a second planetary gear (73) arranged on the second carrier (74), the second planetary gear (73) being located between and engaged with a second sun gear (71) and a second ring gear (72); the second sun gear (71) is fixed on the output shaft (6), and the second ring gear (72) is fixed on the gearbox housing.

5. The dual motor drive system assembly suitable for heavy duty truck according to claim 2 or 3, characterized in that: The first planetary gear train (4) comprises a first carrier (44) arranged on the gearbox housing and a first planetary gear (43) arranged on the first carrier (44), the first planetary gear (43) being located between and engaged with a first sun gear (41) and a first ring gear (42); the first sun gear (41) is fixed on the motor shaft of the main motor (2) and the auxiliary motor (3), and the first ring gear (42) is fixed on the first input shaft (51) and the second input shaft (52).

6. The dual motor drive system assembly suitable for heavy duty truck according to claim 2 or 3, characterized in that: The first input shaft (51) and the second input shaft (52) are arranged in parallel with the output shaft (6), and the output shaft (6) is located in the middle of the first input shaft (51) and the second input shaft (52).

7. The dual motor drive system assembly suitable for heavy duty truck of claim 1, wherein: The main motor (2) and the auxiliary motor (3) are direct-current high-speed motors.

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