Multi-motor driving gearbox and engineering machinery

Abstract

The invention discloses a multi-motor drive gearbox and engineering machinery, which comprises four input motors, nine shafts, seven gear pairs and two gear shifting devices to form four gears. The first motor and the second motor converge and then are connected with a first input shaft, the third motor and the fourth motor converge and then are connected with a second input shaft, and the first input shaft is sleeved with the second input shaft. Power of the four motors is shunted to the two intermediate shafts through the first or second intermediate shaft gear pair and the third or fourth intermediate shaft gear pair and then converged to the output shaft to achieve power transmission. The first gear shifting device is connected to the second input shaft, the second gear shifting device is connected to the first input shaft, and the two gear shifting devices can conduct gear shifting independently. The gearbox adopts a plurality of input motors to improve the driving power of the assembly, and through two independent power transmission paths, one path is switched to a gear during gear shifting, and the other path keeps power output all the time, so that the power is not interrupted in the gear shifting process.

Description

Technical Field

[0001] The present application belongs to the technical field of engineering machinery and relates to a multi-motor driven gearbox and engineering machinery. Background Art

[0002] The gearbox is an important transmission component of new energy wide-body vehicles, and plays a decisive role in the power output performance of the whole machine. In recent years, with the continuous development of new energy technologies and the requirements for cost reduction and efficiency improvement in mining operations, the carrying capacity of wide-body vehicles has gradually increased. On the one hand, higher requirements are placed on the driving capacity of the gearbox input motor, and dual-motor, triple-motor and even quad-motor drive solutions are constantly being applied; on the other hand, non-interrupted shifting of wide-body vehicles during heavy-load operation has become a basic requirement of the high-end market. Multi-motor drive can arrange multiple independent power transmission paths, making non-interrupted shifting of power possible. Summary of the invention

[0003] Purpose: In view of at least one of the above technical problems, in response to the needs of wide-body dump trucks for mining for high driving power of the gearbox and the high-end market for uninterrupted gear shifting of the gearbox, the present application provides a multi-motor driven gearbox and engineering machinery, which increases the output power of the assembly by configuring four drive motors, and uses two independent power transmission paths. When shifting, one path switches the gear, and the other path always maintains power output, thereby achieving uninterrupted power during the gear shifting process.

[0004] Technical solution: To solve the above technical problems, the technical solution adopted in this application is: In a first aspect, a multi-motor drive gearbox is provided, comprising: a first motor outputs power to a first motor shaft, a second motor outputs power to a second motor shaft, a third motor outputs power to a third motor shaft, and a fourth motor outputs power to a fourth motor shaft; the first motor shaft and the second motor shaft output power to the first input shaft via a first input gear pair, the third motor shaft and the fourth motor shaft output power to the second input shaft via a second input gear pair, the first input shaft is transmission-connected to the first intermediate shaft via a third intermediate gear pair and a fourth intermediate gear pair; the second input shaft is transmission-connected to the first intermediate shaft via a first intermediate gear pair and a second intermediate gear pair; the first input shaft is transmission-connected to the second intermediate shaft via a third intermediate gear pair and a fourth intermediate gear pair; the second input shaft is transmission-connected to the first intermediate shaft via a first intermediate gear pair and a second intermediate gear pair; the first intermediate shaft and the second intermediate shaft are transmission-connected to the output shaft via output gear pairs respectively; The first input shaft is sleeved in the second input shaft; the first gear shifting device is located on the second input shaft and is selectively combined or not combined with the driving gears of the first intermediate gear pair and the second intermediate gear pair; the second gear shifting device is located on the first input shaft and is selectively combined or not combined with the driving gears of the third intermediate gear pair and the fourth intermediate gear pair to form gear position N, gear position 1, gear position 2, gear position 3, and gear position 4.

[0005] In some embodiments, the first input gear pair includes a first driving gear mounted on a first motor shaft, a second driving gear mounted on a second motor shaft, and a first driven gear mounted on a first input shaft. The first driving gear and the second driving gear are respectively meshed with the first driven gear; The second input gear pair includes a third driving gear mounted on a third motor shaft, a fourth driving gear mounted on a fourth motor shaft, and a second driven gear mounted on a second input shaft. The third driving gear and the fourth driving gear are respectively meshed with the second driven gear; The first intermediate gear pair includes a fifth driving gear mounted on the second input shaft, a third driven gear mounted on a first intermediate shaft, and a fourth driven gear mounted on a second intermediate shaft. The fifth driving gear is meshed with the third driven gear and the fourth driven gear respectively; The second intermediate gear pair includes a sixth driving gear mounted on the second input shaft, a fifth driven gear mounted on a first intermediate shaft, and a sixth driven gear mounted on a second intermediate shaft. The sixth driving gear is meshed with the fifth driven gear and the sixth driven gear respectively; The third intermediate gear pair includes a seventh driving gear mounted on the first input shaft, a seventh driven gear mounted on a first intermediate shaft, and an eighth driven gear mounted on a second intermediate shaft. The seventh driving gear is meshed with the seventh driven gear and the eighth driven gear respectively; The fourth intermediate gear pair includes an eighth driving gear mounted on the first input shaft, a ninth driven gear mounted on a first intermediate shaft, and a tenth driven gear mounted on a second intermediate shaft. The eighth driving gear is meshed with the ninth driven gear and the tenth driven gear respectively; The output gear pair includes a ninth driving gear mounted on the first intermediate shaft, a tenth driving gear mounted on the second intermediate shaft, and an eleventh driven gear mounted on an output shaft. The ninth driving gear and the tenth driving gear are respectively meshed with the eleventh driven gear.

[0006] Further, in some embodiments, the multi-motor drive gearbox further includes a twelfth driven gear and a power output device. The twelfth driven gear is meshed with the tenth driven gear and is connected to the power output device.

[0007] In some embodiments, the first shifting device is located between the first intermediate gear pair and the second intermediate gear pair, and is selectively engaged or disengaged with the fifth driving gear or the sixth driving gear; The second shifting device is located between the third intermediate gear pair and the fourth intermediate gear pair, and is selectively engaged or disengaged with the seventh driving gear or the eighth driving gear.

[0008] In some embodiments, the first shifting device and the second shifting device can shift gears independently of each other and both have positions L, N, and R.

[0009] Further, in some embodiments, when both the first shifting device and the second shifting device are in the N position, gear position N is achieved.

[0010] When the first shifting device is in the R position and the second shifting device is in the R position, the first shifting device engages with the sixth driving gear of the second intermediate gear pair, and the second shifting device engages with the eighth driving gear of the fourth intermediate gear pair; the power of the first motor and the second motor is transmitted to the first input shaft through the first input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the fourth intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair; the power of the third motor and the fourth motor is transmitted to the second input shaft through the second input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the second intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair, achieving gear position 1.

[0011] When the first shifting device is in the L position and the second shifting device is in the R position, the first shifting device engages with the fifth driving gear of the first intermediate gear pair, and the second shifting device engages with the eighth driving gear of the fourth intermediate gear pair; the power of the first motor and the second motor is transmitted to the first input shaft through the first input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the fourth intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair; the power of the third motor and the fourth motor is transmitted to the second input shaft through the second input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the first intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair, achieving gear position 2.

[0012] When the first shifting device is in the R position and the second shifting device is in the L position, the first shifting device engages with the sixth driving gear of the second intermediate gear pair, and the second shifting device engages with the seventh driving gear of the third intermediate gear pair; the power of the first motor and the second motor is transmitted to the first input shaft through the first input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the third intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair; the power of the third motor and the fourth motor is transmitted to the second input shaft through the second input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the second intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair, achieving gear position 3.

[0013] When the first shifting device is in the L position and the second shifting device is in the L position, the first shifting device is engaged with the fifth driving gear of the first intermediate gear pair, and the second shifting device is engaged with the seventh driving gear of the third intermediate gear pair; the power of the first motor and the second motor is transmitted to the first input shaft through the first input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the third intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair; the power of the third motor and the fourth motor is transmitted to the second input shaft through the second input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the first intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair, achieving gear 4.

[0014] In a second aspect, a construction machine is provided, including the multi-motor drive transmission described above.

[0015] In some embodiments, the construction machine is a mining wide-body dump truck.

[0016] Beneficial effects: The multi-motor drive transmission and the construction machine provided by this application have the following advantages: It includes 4 input motors, 9 shafts, 7 gear pairs, 22 gears and 2 shifting devices, forming four gears. After the first motor and the second motor are confluent, they are connected to the first input shaft. After the third motor and the fourth motor are confluent, they are connected to the second input shaft, and the first input shaft is sleeved inside the second input shaft; the power of the four motors is respectively shunted to two intermediate shafts through the first or second intermediate shaft gear pair, the third or fourth intermediate shaft gear pair, and then confluent to the output shaft to achieve power transmission; the first shifting device is connected to the second input shaft, and the second shifting device is connected to the first input shaft, and the two shifting devices can shift gears independently. The transmission uses multiple input motors to improve the total drive power. Through two independent power transmission paths, when shifting gears, one path switches gears, and the other path always maintains power output, realizing uninterrupted power during the shifting process. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the principle of the multi-motor drive transmission according to an embodiment of the present application; In the figure: the first motor M1, the second motor M2, the third motor M3, the fourth motor M4; the first motor shaft S1, the second motor shaft S2, the third motor shaft S3, the fourth motor shaft S4, the first input shaft S5, the second input shaft S6, the first intermediate shaft S7, the second intermediate shaft S8, the output shaft S9; the first driving gear Z1, the second driving gear Z2, the first driven gear Z3, the third driving gear Z4, the fourth driving gear Z5, the second driven gear Z6, the fifth driving gear Z17, the third driven gear Z7, the fourth driven gear Z12, the sixth driving gear Z18, the fifth driven gear Z8, the sixth driven gear Z13, the seventh driving gear Z19, the seventh driven gear Z9, the eighth driven gear Z14, the eighth driving gear Z20, the ninth driven gear Z10, the tenth driven gear Z15, the ninth driving gear Z11, the tenth driving gear Z16, the eleventh driven gear Z21, the twelfth driven gear Z22; the first shifting device A, the second shifting device B, and the power take-off device PTO. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the sake of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more than two.

[0021] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific circumstances.

[0022] Embodiment 1: As Figure 1 shown, a multi-motor drive gearbox includes: a first motor M1, a second motor M2, a third motor M3, a fourth motor M4, a first motor shaft S1, a second motor shaft S2, a third motor shaft S3, a fourth motor shaft S4, a first input shaft S5, a second input shaft S6, a first intermediate shaft S7, a second intermediate shaft S8, an output shaft S9, a first input gear pair, a second input gear pair, a first intermediate gear pair, a second intermediate gear pair, a third intermediate gear pair, a fourth intermediate gear pair, a first shifting device A and a second shifting device B; The power of the first motor M1 is output to the first motor shaft S1, the power of the second motor M2 is output to the second motor shaft S2, the power of the third motor M3 is output to the third motor shaft S3, and the power of the fourth motor M4 is output to the fourth motor shaft S4. The power of the first motor shaft S1 and the second motor shaft S2 is output to the first input shaft S5 through the first input gear pair. The power of the third motor shaft S3 and the fourth motor shaft S4 is output to the second input shaft S6 through the second input gear pair. The first input shaft S5 is drivingly connected to the first intermediate shaft S7 through the third intermediate gear pair and the fourth intermediate gear pair. The second input shaft S6 is drivingly connected to the first intermediate shaft S7 through the first intermediate gear pair and the second intermediate gear pair. The first input shaft S5 is drivingly connected to the second intermediate shaft S8 through the third intermediate gear pair and the fourth intermediate gear pair. The second input shaft S6 is drivingly connected to the second intermediate shaft S8 through the first intermediate gear pair and the second intermediate gear pair. The first intermediate shaft S7 and the second intermediate shaft S8 are respectively drivingly connected to the output shaft S9 through the output gear pair. The first input shaft S5 is sleeved inside the second input shaft S6. The first shifting device A is located on the second input shaft S6 and selectively engages or disengages with the driving gears of the first intermediate gear pair and the second intermediate gear pair. The second shifting device B is located on the first input shaft S5 and selectively engages or disengages with the driving gears of the third intermediate gear pair and the fourth intermediate gear pair to form the neutral gear N, the first gear 1, the second gear 2, the third gear 3, and the fourth gear 4.

[0023] In some embodiments, the first input gear pair includes a first driving gear Z1 fixed on the first motor shaft S1, a second driving gear Z2 fixed on the second motor shaft S2, and a first driven gear Z3 fixed on the first input shaft S5. The first driving gear Z1 and the second driving gear Z2 are respectively meshed with the first driven gear Z3. The second input gear pair includes a third driving gear Z4 fixed on the third motor shaft S3, a fourth driving gear Z5 fixed on the fourth motor shaft S4, and a second driven gear Z6 fixed on the second input shaft S6. The third driving gear Z4 and the fourth driving gear Z5 are respectively meshed with the second driven gear Z6. The first intermediate gear pair includes a fifth driving gear Z17 fixed on the second input shaft S6, a third driven gear Z7 fixed on the first intermediate shaft S7, and a fourth driven gear Z12 fixed on the second intermediate shaft S8. The fifth driving gear Z17 is respectively meshed with the third driven gear Z7 and the fourth driven gear Z12. The second intermediate gear pair includes a sixth driving gear Z18 fixed on the second input shaft S6, a fifth driven gear Z8 fixed on the first intermediate shaft S7, and a sixth driven gear Z13 fixed on the second intermediate shaft S8. The sixth driving gear Z18 is respectively meshed with the fifth driven gear Z8 and the sixth driven gear Z13. The third intermediate gear pair includes a seventh driving gear Z19 fixed on the first input shaft S5, a seventh driven gear Z9 fixed on the first intermediate shaft S7, and an eighth driven gear Z14 fixed on the second intermediate shaft S8. The seventh driving gear Z19 meshes with the seventh driven gear Z9 and the eighth driven gear Z14 respectively; The fourth intermediate gear pair includes an eighth driving gear Z20 fixed on the first input shaft S5, a ninth driven gear Z10 fixed on the first intermediate shaft S7, and a tenth driven gear Z15 fixed on the second intermediate shaft S8. The eighth driving gear Z20 meshes with the ninth driven gear Z10 and the tenth driven gear Z15 respectively; The output gear pair includes a ninth driving gear Z11 fixed on the first intermediate shaft S7, a tenth driving gear Z16 fixed on the second intermediate shaft S8, and an eleventh driven gear Z21 fixed on the output shaft S9. The ninth driving gear Z11 and the tenth driving gear Z16 mesh with the eleventh driven gear Z21 respectively.

[0024] In some embodiments, as Figure 1 shown, the multi-motor drive gearbox further includes a twelfth driven gear Z22 and a power take-off device PTO. The twelfth driven gear Z22 meshes with the tenth driven gear Z15 and is connected to the power take-off device PTO.

[0025] In some embodiments, as Figure 1 shown, the first shifting device A is located between the first intermediate gear pair and the second intermediate gear pair, and is selectively combined or not combined with the fifth driving gear Z17 or the sixth driving gear Z18; The second shifting device B is located between the third intermediate gear pair and the fourth intermediate gear pair, and is selectively combined or not combined with the seventh driving gear Z19 or the eighth driving gear Z20.

[0026] In some embodiments, the first shifting device A and the second shifting device B can shift gears independently of each other, and both have positions L, N, and R.

[0027] Furthermore, in some embodiments, the control logic of each gear position is shown in Table 1.

[0028] Table 1. Control Logic of Each Gear Position

[0029] Note: In the table, "√" indicates the working position in the current gear position of the corresponding shifting device.

[0030] When the gearbox shifts gears, the two shifting devices shift gears in sequence, ensuring that after one shifting device completes the gear shift, the other device then performs the gear shift to achieve seamless gear shifting without power interruption.

[0031] The following will combine Figure 1 with Table 1 to elaborate on the examples of this application in detail: When both the first shifting device A and the second shifting device B are in the neutral position (N position), gear position N is achieved.

[0032] When the first shifting device A is in the R position and the second shifting device B is in the R position, the first shifting device A is engaged with the sixth driving gear Z18 of the second intermediate gear pair, and the second shifting device B is engaged with the eighth driving gear Z20 of the fourth intermediate gear pair; the power of the first motor M1 and the second motor M2 is transmitted to the first input shaft S5 through the first input gear pair, then transmitted to the first intermediate shaft S7 and the second intermediate shaft S8 through the fourth intermediate gear pair, and then transmitted to the output shaft S9 through the output shaft gear pair; the power of the third motor M3 and the fourth motor M4 is transmitted to the second input shaft S6 through the second input gear pair, then transmitted to the first intermediate shaft S7 and the second intermediate shaft S8 through the second intermediate gear pair, and then transmitted to the output shaft S9 through the output shaft gear pair, achieving gear position 1.

[0033] When the first shifting device A is in the L position and the second shifting device B is in the R position, the first shifting device A is engaged with the fifth driving gear Z17 of the first intermediate gear pair, and the second shifting device B is engaged with the eighth driving gear Z20 of the fourth intermediate gear pair; the power of the first motor M1 and the second motor M2 is transmitted to the first input shaft S5 through the first input gear pair, then transmitted to the first intermediate shaft S7 and the second intermediate shaft S8 through the fourth intermediate gear pair, and then transmitted to the output shaft S9 through the output shaft gear pair; the power of the third motor M3 and the fourth motor M4 is transmitted to the second input shaft S6 through the second input gear pair, then transmitted to the first intermediate shaft S7 and the second intermediate shaft S8 through the first intermediate gear pair, and then transmitted to the output shaft S9 through the output shaft gear pair, achieving gear position 2.

[0034] When the first shifting device A is in the R position and the second shifting device B is in the L position, the first shifting device A is engaged with the sixth driving gear Z18 of the second intermediate gear pair, and the second shifting device B is engaged with the seventh driving gear Z19 of the third intermediate gear pair; the power of the first motor M1 and the second motor M2 is transmitted to the first input shaft S5 through the first input gear pair, then transmitted to the first intermediate shaft S7 and the second intermediate shaft S8 through the third intermediate gear pair, and then transmitted to the output shaft S9 through the output shaft gear pair; the power of the third motor M3 and the fourth motor M4 is transmitted to the second input shaft S6 through the second input gear pair, then transmitted to the first intermediate shaft S7 and the second intermediate shaft S8 through the second intermediate gear pair, and then transmitted to the output shaft S9 through the output shaft gear pair, achieving gear position 3.

[0035] When the first shifting device A is in the L position and the second shifting device B is in the L position, the first shifting device A is engaged with the fifth driving gear Z17 of the first intermediate gear pair, and the second shifting device B is engaged with the seventh driving gear Z19 of the third intermediate gear pair; the power of the first motor M1 and the second motor M2 is transmitted to the first input shaft S5 through the first input gear pair, then transmitted to the first intermediate shaft S7 and the second intermediate shaft S8 through the third intermediate gear pair, and then transmitted to the output shaft S9 through the output shaft gear pair; the power of the third motor M3 and the fourth motor M4 is transmitted to the second input shaft S6 through the second input gear pair, then transmitted to the first intermediate shaft S7 and the second intermediate shaft S8 through the first intermediate gear pair, and then transmitted to the output shaft S9 through the output shaft gear pair, realizing gear 4.

[0036] The multi-motor drive transmission in this application includes 4 input motors, 9 shafts, 7 gear pairs, 22 gears and 2 shifting devices, forming four gears. The first motor and the second motor are combined and connected to the first input shaft, the third motor and the fourth motor are combined and connected to the second input shaft, and the first input shaft is sleeved inside the second input shaft; the power of the four motors is respectively shunted to the two intermediate shafts through the first or second intermediate shaft gear pair, the third or fourth intermediate shaft gear pair, and then combined to the output shaft to achieve power transmission; the first shifting device is connected to the second input shaft, and the second shifting device is connected to the first input shaft, and the two shifting devices can shift gears independently. The transmission uses multiple input motors to increase the total drive power. Through two independent power transmission paths, one path switches gears during shifting, and the other path always maintains power output, realizing uninterrupted power during the shifting process.

[0037] Embodiment 2: A construction machine includes the multi-motor drive transmission for construction machines described in Embodiment 1.

[0038] In some embodiments, the construction machine may be a mining wide-body dump truck.

[0039] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A multi-motor drive gearbox, characterized in that, include: The first motor outputs power to the first motor shaft, the second motor outputs power to the second motor shaft, the third motor outputs power to the third motor shaft, and the fourth motor outputs power to the fourth motor shaft; the first motor shaft and the second motor shaft output power to the first input shaft via the first input gear pair, the third motor shaft and the fourth motor shaft output power to the second input shaft via the second input gear pair, the first input shaft is connected to the first intermediate shaft via the third intermediate gear pair and the fourth intermediate gear pair; the second input shaft is connected to the first intermediate shaft via the first intermediate gear pair and the second intermediate gear pair; the first input shaft is connected to the second intermediate shaft via the third intermediate gear pair and the fourth intermediate gear pair; the second input shaft is connected to the first intermediate shaft via the first intermediate gear pair and the second intermediate gear pair; the first intermediate shaft and the second intermediate shaft are connected to the output shaft via the output gear pair respectively; The first input shaft is sleeved in the second input shaft; the first gear shifting device is located on the second input shaft and is selectively combined or not combined with the driving gears of the first intermediate gear pair and the second intermediate gear pair; the second gear shifting device is located on the first input shaft and is selectively combined or not combined with the driving gears of the third intermediate gear pair and the fourth intermediate gear pair to form gear position N, gear position 1, gear position 2, gear position 3, and gear position 4.

2. The multi-motor drive gearbox according to claim 1, wherein The first input gear pair comprises a first driving gear mounted on the first motor shaft, a second driving gear mounted on the second motor shaft, and a first driven gear mounted on the first input shaft, the first driving gear and the second driving gear being meshed with the first driven gear respectively; The second input gear pair comprises a third driving gear mounted on the third motor shaft, a fourth driving gear mounted on the fourth motor shaft, and a second driven gear mounted on the second input shaft, the third driving gear and the fourth driving gear being meshed with the second driven gear respectively; The first intermediate gear pair comprises a fifth driving gear mounted on the second input shaft, a third driven gear mounted on the first intermediate shaft, and a fourth driven gear mounted on the second intermediate shaft, the fifth driving gear meshing with the third driven gear and the fourth driven gear respectively; The second intermediate gear pair comprises a sixth driving gear mounted on the second input shaft, a fifth driven gear mounted on the first intermediate shaft, and a sixth driven gear mounted on the second intermediate shaft, the sixth driving gear meshing with the fifth driven gear and the sixth driven gear respectively; The third intermediate gear pair comprises a seventh driving gear mounted on the first input shaft, a seventh driven gear mounted on the first intermediate shaft, and an eighth driven gear mounted on the second intermediate shaft, the seventh driving gear meshing with the seventh driven gear and the eighth driven gear respectively; The fourth intermediate gear pair includes an eighth driving gear mounted on the first input shaft, a ninth driven gear mounted on the first intermediate shaft, and a tenth driven gear mounted on the second intermediate shaft, the eighth driving gear meshing with the ninth driven gear and the tenth driven gear respectively; The output gear pair includes a ninth driving gear mounted on the first intermediate shaft, a tenth driving gear mounted on the second intermediate shaft, and an eleventh driven gear mounted on the output shaft. The ninth driving gear and the tenth driving gear are respectively meshed with the eleventh driven gear.

3. The multi-motor drive gearbox according to claim 2, characterized in that, It further includes a twelfth driven gear and a power output device. The twelfth driven gear is meshed with the tenth driven gear and connected to the power output device.

4. The multi-motor drive gearbox according to claim 2, characterized in that, The first shifting device is located between the first intermediate gear pair and the second intermediate gear pair, and is selectively combined or not combined with the fifth driving gear or the sixth driving gear. The second shifting device is located between the third intermediate gear pair and the fourth intermediate gear pair, and is selectively combined or not combined with the seventh driving gear or the eighth driving gear.

5. The multi-motor drive gearbox according to claim 1, characterized in that, The first shifting device and the second shifting device can shift gears independently of each other, and both have positions L, N, and R.

6. The multi-motor drive gearbox according to claim 5, characterized in that, When both the first shifting device and the second shifting device are in the N position, gear position N is achieved.

7. The multi-motor drive gearbox according to claim 5, characterized in that, When the first shifting device is in the R position and the second shifting device is in the R position, the first shifting device is combined with the sixth driving gear of the second intermediate gear pair, and the second shifting device is combined with the eighth driving gear of the fourth intermediate gear pair. The power of the first motor and the second motor is transmitted to the first input shaft through the first input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the fourth intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair. The power of the third motor and the fourth motor is transmitted to the second input shaft through the second input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the second intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair, achieving gear position 1.

8. The multi-motor drive gearbox according to claim 5, wherein, When the first shifting device is in the L position and the second shifting device is in the R position, the first shifting device is combined with the fifth driving gear of the first intermediate gear pair, and the second shifting device is combined with the eighth driving gear of the fourth intermediate gear pair. The power of the first motor and the second motor is transmitted to the first input shaft through the first input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the fourth intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair. The power of the third motor and the fourth motor is transmitted to the second input shaft through the second input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the first intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair, achieving gear position 2.

9. The multi-motor drive gearbox according to claim 5, wherein, When the first shifting device is in the R position and the second shifting device is in the L position, the first shifting device is combined with the sixth driving gear of the second intermediate gear pair, and the second shifting device is combined with the seventh driving gear of the third intermediate gear pair. The power of the first motor and the second motor is transmitted to the first input shaft through the first input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the third intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair. The power of the third motor and the fourth motor is transmitted to the second input shaft through the second input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the second intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair, achieving gear position 3.

10. The multi-motor drive gearbox according to claim 5, wherein When the first shifting device is in the L position and the second shifting device is in the L position, the first shifting device is engaged with the fifth driving gear of the first intermediate gear pair, and the second shifting device is engaged with the seventh driving gear of the third intermediate gear pair; the power of the first motor and the second motor is transmitted to the first input shaft through the first input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the third intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair; The power of the third motor and the fourth motor is transmitted to the second input shaft through the second input gear pair, then transmitted to the first intermediate shaft and the second intermediate shaft through the first intermediate gear pair, and then transmitted to the output shaft through the output shaft gear pair to achieve gear 4.

11. An engineering machinery, characterized in that, Comprising the multi-motor drive gearbox according to any one of claims 1 to 10.

Images