A gearbox and a working machine

Abstract

The utility model belongs to the technical field of engineering machinery, disclose a kind of gearbox and engineering machinery, gearbox includes box and the first input mechanism, second input mechanism and output mechanism in box, first input mechanism includes first motor and first drive system, second input mechanism includes second motor and second drive system, output mechanism is located in box, including output shaft and the output gear fixed on output shaft, first motor is connected with output gear transmission by first drive system, second motor is connected with output gear transmission by second drive system, first drive system is equipped with clutch, clutch is used to transmit or disconnect the power of first drive system, first motor and second motor are arranged on the same side of box;Engineering machinery includes above-mentioned gearbox. The gearbox provided in the embodiment has small space occupation, is convenient to overhaul, and is more reliable and durable.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a gearbox and engineering machinery. Background Technology

[0002] Currently, some electrically driven construction machinery is equipped with dual-motor gearboxes. Dual-motor gearboxes provide more flexible and efficient power output, meeting the needs of various special working conditions such as heavy loads and hill climbing. Furthermore, in scenarios requiring frequent switching of working modes and speeds, they can accelerate response and reduce shifting time and power loss.

[0003] In the existing technology, some dual-motor gearboxes have the two motors set on opposite sides of the gearbox. This arrangement places a large space requirement on the gearbox and the chassis of the construction machinery, and makes it difficult to inspect and maintain. In addition, it requires the internal transmission gears to have a large gear safety factor, and the gears are more prone to wear and damage. Utility Model Content

[0004] The purpose of this utility model is to provide a gearbox that occupies little space, is easy to maintain, and is more reliable and durable.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A gearbox, comprising:

[0007] Box;

[0008] The first input mechanism is located inside the housing and includes a first motor and a first transmission system;

[0009] The second input mechanism is located inside the housing and includes a second motor and a second transmission system;

[0010] The output mechanism is located inside the housing and includes an output shaft and an output gear fixedly mounted on the output shaft.

[0011] The first motor is connected to the output gear via the first transmission system, and the second motor is connected to the output gear via the second transmission system; the first transmission system is equipped with a clutch, which is used to transmit or disconnect the power of the first transmission system;

[0012] The first motor and the second motor are located on the same side of the housing.

[0013] Preferably, the first transmission system includes a first input shaft, a second input shaft, a third input shaft, a first gear, a second gear, a third gear, a fourth gear, and a fifth gear. The first gear is fixed to the first input shaft, the second gear and the third gear are fixed to the second input shaft, the fourth gear is fixed to the third input shaft, and the fifth gear is movably mounted on the third input shaft.

[0014] The first motor is connected to the first input shaft, the first gear is meshed with the second gear, the third gear is meshed with the fourth gear, the fifth gear is meshed with the output gear, and the clutch includes a clutch fixed on the third input shaft, which is used to engage or disengage the fifth gear.

[0015] Preferably, the first transmission system includes a first planetary gear set, a third input shaft, a fourth gear, and a fifth gear. The first planetary gear set includes a first planet carrier, a plurality of first planet gears disposed on the first planet carrier, a first sun gear meshing with the plurality of first planet gears, and a first gear ring meshing with the plurality of first planet gears. The first gear ring is fixed to the housing, the first planet carrier is rotatably connected to the housing, the fourth gear is fixed to the third input shaft, and the fifth gear is movably disposed on the third input shaft.

[0016] The first sun gear is fixedly mounted on the output shaft of the first motor, the first planetary carrier is meshed with the fourth gear, the fifth gear is meshed with the output gear, and the clutch includes a clutch fixed on the third input shaft, which is used to engage or disengage the fifth gear.

[0017] Preferably, the first transmission system includes a first planetary gear set and a second planetary gear set. The first planetary gear set includes a first planet carrier, a plurality of first planet gears disposed on the first planet carrier, a first sun gear meshing with the plurality of first planet gears, and a first ring gear meshing with the plurality of first planet gears. The first ring gear is fixed to the housing, and the first planet carrier is rotatably connected to the housing. The second planetary gear set includes a second planet carrier, a plurality of second planet gears disposed on the second planet carrier, a second sun gear meshing with the plurality of second planet gears, and a second ring gear meshing with the plurality of second planet gears. The second ring gear is fixed to the housing, and the second planet carrier is rotatably connected to the housing.

[0018] The first sun gear is fixedly sleeved on the output shaft of the first motor. The first planetary carrier is connected to the second sun gear via a transmission. The second planetary carrier is meshed with the output gear. The clutch includes a first engagement sleeve, which is used to engage or disengage the second planetary gear and the second gear ring.

[0019] Preferably, the first transmission system further includes a third input shaft and a fourth gear, the fourth gear being fixedly mounted on the third input shaft, the first planetary carrier being connected to the fourth gear in a transmission connection, and the second sun gear being fixedly mounted on the third input shaft.

[0020] Preferably, the first transmission system includes a first planetary gear set and a third planetary gear set. The first planetary gear set includes a first planet carrier, a plurality of first planetary gears disposed on the first planet carrier, a first sun gear meshing with the plurality of first planetary gears, and a first ring gear meshing with the plurality of first planetary gears. The first ring gear is fixed to the housing, and the first planet carrier is rotatably connected to the housing. The third planetary gear set includes a third planet carrier, a third ring gear, a third sun gear, and a plurality of third planetary gears. The third sun gear meshes with the plurality of third planetary gears, and the plurality of third planetary gears mesh with a first end of the third planet carrier. The third ring gear is fixed to the housing, and the third planet carrier is rotatably connected to the housing.

[0021] The first sun gear is fixedly mounted on the output shaft of the first motor. The first planetary carrier is connected to the third sun gear via a transmission. The second end of the third planetary carrier is meshed with the output gear. The clutch includes a second engagement sleeve, which is used to engage or disengage the third gear ring from the gear shaft of the third planetary gear.

[0022] Preferably, the first transmission system further includes a third input shaft and a fourth gear, the fourth gear being fixedly mounted on the third input shaft, the first planetary carrier being connected to the fourth gear in a transmission connection, and the third sun gear being fixedly mounted on the third input shaft.

[0023] Preferably, the second transmission system includes a fourth input shaft and a sixth gear. The fourth input shaft is connected to the output shaft of the second motor, and the sixth gear is fixed on the fourth input shaft and meshes with the output gear.

[0024] Preferably, the second transmission system includes a fourth planetary gear set, which includes a fourth planetary carrier, a plurality of fourth planetary gears disposed on the fourth planetary carrier, a fourth sun gear meshing with the plurality of fourth planetary gears, and a fourth ring gear meshing with the plurality of fourth planetary gears. The fourth ring gear is fixed to the housing, the fourth planetary carrier is rotatably connected to the housing, the fourth sun gear is fixed to the output shaft of the second motor, and the fourth planetary carrier is meshed with the output gear.

[0025] This utility model also provides an engineering machine, including the above-mentioned gearbox, which has more flexible and efficient power output, and is more reliable and durable, and is easy to inspect and maintain.

[0026] An engineering machine, comprising:

[0027] Chassis;

[0028] The gearbox as described in any of the preceding claims, wherein the housing is mounted on the chassis.

[0029] Beneficial effects:

[0030] The gearbox provided in this embodiment has a first input mechanism, a second input mechanism, and an output mechanism within its housing. The first input mechanism includes a first motor and a first transmission system, while the second input mechanism includes a second motor and a second transmission system. The first motor is connected to the output gear via the first transmission system, transmitting power to the output shaft. The second motor is also connected to the output gear via the second transmission system, transmitting power to the output shaft. A clutch is used to transmit or disconnect power from the first transmission system. When the clutch disconnects power from the first transmission system, only the second motor provides torque. When the clutch transmits power from the first transmission system, both the first and second motors jointly provide torque, ensuring flexible and efficient power output. The first and second motors are located on the same side of the housing, which reduces the lateral space of the gearbox housing, resulting in a more compact structure and reduced space occupation. Furthermore, the co-location of the first and second motors on the same side also facilitates the placement of the first and second transmission systems relative to the housing, simplifying maintenance. Additionally, it reduces the safety requirements for the large gear, lowering the possibility of gear damage and making the gearbox more reliable and durable.

[0031] The engineering machinery provided in this embodiment includes the aforementioned gearbox. The dual-motor operation enables timely, flexible, and efficient power output, meeting the needs of various special working conditions such as heavy loads and hill climbing. It is also more reliable, durable, and easy to inspect and maintain. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the gearbox provided by this utility model;

[0033] Figure 2 This is a schematic diagram of the structure of a gearbox provided in another embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of a gearbox provided in another embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of a gearbox provided in another embodiment of the present invention;

[0036] Figure 5 This is a structural schematic diagram of a gearbox provided in another embodiment of this utility model;

[0037] Figure 6 This is a schematic diagram of the structure of a gearbox provided in another embodiment of the present invention;

[0038] Figure 7 This is a structural schematic diagram of a gearbox provided in another embodiment of the present invention.

[0039] In the picture:

[0040] 1. Box body;

[0041] 2. First input mechanism; 21. First motor; 22. First input shaft; 221. First gear; 23. Second input shaft; 231. Second gear; 232. Third gear; 24. Third input shaft; 241. Fourth gear; 242. Fifth gear; 25. First planetary gear set; 251. First planet carrier; 252. First planetary gear; 253. First sun gear; 254. First ring gear; 26. Second planetary gear set; 261. Second planet carrier; 262. Second planetary gear; 263. Second sun gear; 264. Second ring gear; 27. Third planetary gear set; 271. Third planet carrier; 272. Third ring gear; 273. Third sun gear; 274. Third planetary gear;

[0042] 3. Second input mechanism; 31. Second motor; 32. Fourth input shaft; 321. Sixth gear; 33. Fourth planetary gear set; 331. Fourth planetary carrier; 332. Fourth planetary gear; 333. Fourth sun gear; 334. Fourth gear ring;

[0043] 4. Output mechanism; 41. Output shaft; 42. Output gear;

[0044] 51. Clutch; 52. First engagement sleeve; 53. Second engagement sleeve. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0046] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0049] This embodiment provides a gearbox. (Refer to...) Figures 1 to 7As shown, the gearbox includes a housing 1, a first input mechanism 2, a second input mechanism 3, and an output mechanism 4. The first input mechanism 2, located within the housing 1, includes a first motor 21 and a first transmission system. The second input mechanism 3, located within the housing 1, includes a second motor 31 and a second transmission system. The output mechanism 4, located within the housing 1, includes an output shaft 41 and an output gear 42 fixedly mounted on the output shaft 41. The first motor 21 is connected to the output gear 42 via the first transmission system, and the second motor 31 is connected to the output gear 42 via the second transmission system. The first transmission system includes a clutch element used to transmit or disconnect power from the first transmission system. The first motor 21 and the second motor 31 are located on the same side of the housing 1.

[0050] In this embodiment, the gearbox housing 1 is equipped with a first input mechanism 2, a second input mechanism 3, and an output mechanism 4. The first input mechanism 2 includes a first motor 21 and a first transmission system, and the second input mechanism 3 includes a second motor 31 and a second transmission system. The first motor 21 is connected to the output gear 42 via the first transmission system, transmitting power to the output shaft 41; the second motor 31 is connected to the output gear 42 via the second transmission system, transmitting power to the output shaft 41. The clutch is used to transmit or disconnect the power of the first transmission system. When the clutch disconnects the power of the first transmission system, only the second motor 31 provides torque; when the clutch transmits the power of the first transmission system, the first motor 21 and the second motor 31 jointly provide torque, ensuring flexible and efficient power output. In this gearbox, the first motor 21 and the second motor 31 are located on the same side of the gearbox housing 1, which can reduce the lateral space of the gearbox housing 1 to a certain extent, making the structure more compact and reducing space occupation. Furthermore, the fact that the first motor 21 and the second motor 31 are arranged on the same side means that the first transmission system and the second transmission system are also arranged on the same side relative to the gearbox housing 1, facilitating inspection and maintenance. Meanwhile, the introduction of the clutch reduces the number of gear shafts, simplifying control. Furthermore, it lowers the safety factor requirements for the large gears, reducing the possibility of gear damage and making the gearbox more reliable and durable.

[0051] In this embodiment, Figures 1 to 7 These are several different implementations of the gearbox. The first and second transmission systems can be selected according to the specific situation. For example, if the motor is a high-speed motor and it is necessary to increase torque by reducing speed, then a fixed-axis gear set can be selected first, but the space occupancy rate will be higher. If the motor speed is not high, a planetary gear set can be selected for design, which can maximize the use of space.

[0052] For example, the first transmission system has the following optional implementations:

[0053] Option 1: The first transmission system includes a first input shaft 22, a second input shaft 23, a third input shaft 24, a first gear 221, a second gear 231, a third gear 232, a fourth gear 241, and a fifth gear 242. The first gear 221 is fixed to the first input shaft 22, the second gear 231 and the third gear 232 are fixed to the second input shaft 23, the fourth gear 241 is fixed to the third input shaft 24, and the fifth gear 242 is movably mounted on the third input shaft 24. A first motor 21 is connected to the first input shaft 22. The first gear 221 meshes with the second gear 231, the third gear 232 meshes with the fourth gear 241, and the fifth gear 242 meshes with the output gear 42. The clutch includes a clutch 51 fixed to the third input shaft 24, which engages or disengages the fifth gear 242. Specifically, the first input shaft 22, the second input shaft 23, and the third input shaft 24 are all rotatably mounted within the housing 1. The output shaft 41 of the first motor 21 is connected to the first input shaft 22 via a coupling. The first gear 221 and the first input shaft 22, the second gear 231 and the second input shaft 23, the third gear 232 and the second input shaft 23, and the fourth gear 241 and the third input shaft 24 are all effectively fixed by key and keyway engagement. Specifically, in this embodiment, when the first transmission system is working, the clutch 51 engages with the fifth gear 242, causing the output shaft 41 of the first motor 21 to rotate and provide power. This power is transmitted sequentially through the first input shaft 22, the first gear 221, the second gear 231, the second input shaft 23, the third gear 232, the fourth gear 241, the third input shaft 24, the fifth gear 242, and the output gear 42 to the output shaft 41, whereby, together with the second transmission system, the power is applied to the output shaft 41 and output.

[0054] Optional Embodiment 2: The first transmission system includes a first planetary gear set 25, a third input shaft 24, a fourth gear 241, and a fifth gear 242. The first planetary gear set 25 includes a first planet carrier 251, a plurality of first planet gears 252 disposed on the first planet carrier 251, a first sun gear 253 meshing with the plurality of first planet gears 252, and a first ring gear 254 meshing with the plurality of first planet gears 252. The first ring gear 254 is fixed to the housing 1, the first planet carrier 251 is rotatably connected to the housing 1, the fourth gear 241 is fixed to the third input shaft 24, and the fifth gear 242 is movably disposed on the third input shaft 24. The first sun gear 253 is fixedly sleeved on the output shaft 41 of the first motor 21. The first planet carrier 251 is meshed with the fourth gear 241, and the fifth gear 242 is meshed with the output gear 42. The clutch includes a clutch 51 fixed to the third input shaft 24, and the clutch 51 is used to engage or disengage the fifth gear 242. Specifically, by setting the first planetary gear set 25 and fixing and driving different components, multiple transmission ratios can be further realized. Specifically, the outer periphery of the first planetary carrier 251 is provided with a ring tooth structure, which can reliably and effectively mesh with the fourth gear 241. Specifically, in this embodiment, when the first transmission system is working, the clutch 51 engages with the fifth gear 242, and the output shaft 41 of the first motor 21 rotates to provide power. The power is transmitted sequentially through the first sun gear 253, the first planetary gear 252, the first planetary carrier 251, the fourth gear 241, the third input shaft 24, the fifth gear 242, and the output gear 42 to the output shaft 41, and together with the second transmission system, the power is applied to the output shaft 41 and output.

[0055] Option 3: The first transmission system includes a first planetary gear set 25 and a second planetary gear set 26. The first planetary gear set 25 includes a first planet carrier 251, a plurality of first planet gears 252 disposed on the first planet carrier 251, a first sun gear 253 meshing with the plurality of first planet gears 252, and a first ring gear 254 meshing with the plurality of first planet gears 252. The first ring gear 254 is fixed to the housing 1, and the first planet carrier 251 is rotatably connected to the housing 1. The second planetary gear set 26 includes a second planet carrier 261, a plurality of second planet gears 262 disposed on the second planet carrier 261, a second sun gear 263 meshing with the plurality of second planet gears 262, and a second ring gear 264 meshing with the plurality of second planet gears 262. The second ring gear 264 is fixed to the housing 1, and the second planet carrier 261 is rotatably connected to the housing 1. The first sun gear 253 is fixedly sleeved on the output shaft 41 of the first motor 21. The first planetary carrier 251 is connected to the second sun gear 263, and the second planetary carrier 261 is meshed with the output gear 42. The clutch includes a first engagement sleeve 52, which is used to engage or disengage the second planetary gear 262 and the second gear ring 264. Specifically, the second planetary carrier 261 has a ring of teeth on its outer circumference, which can reliably and effectively mesh with the output gear 42. In this embodiment, when the first transmission system is working, the first engagement sleeve 52 engages the second planetary gear 262 and the second gear ring 264. The output shaft 41 of the first motor 21 rotates to provide power. The power is transmitted sequentially through the first sun gear 253, the first planetary gear 252, the first planetary carrier 251, the second sun gear 263, the second planetary gear 262, the second planetary carrier 261, and the output gear 42 to the output shaft 41, and together with the second transmission system, the power is applied to the output shaft 41 and output.

[0056] Optional Embodiment 4: Based on Optional Embodiment 3, it may further include a third input shaft 24 and a fourth gear 241. The fourth gear 241 is fixedly mounted on the third input shaft 24, the first planetary carrier 251 is meshed with the fourth gear 241, and the second sun gear 263 is fixedly sleeved on the third input shaft 24. The use of the third input shaft 24 and the fourth gear 241 allows the first planetary gear set 25 and the second planetary gear set 26 to be configured as non-coaxial, and can be staggered according to actual conditions.

[0057] Option 5: The first transmission system includes a first planetary gear set 25 and a third planetary gear set 27. The first planetary gear set 25 includes a first planet carrier 251, a plurality of first planet gears 252 disposed on the first planet carrier 251, a first sun gear 253 meshing with the plurality of first planet gears 252, and a first ring gear 254 meshing with the plurality of first planet gears 252. The first ring gear 254 is fixed to the housing 1, and the first planet carrier 251 is rotatably connected to the housing 1. The third planetary gear set 27 includes a third planet carrier 271, a third ring gear 272, a third sun gear 273, and a plurality of third planet gears 274. The third sun gear 273 is meshed with the plurality of third planet gears 274, and the plurality of third planet gears 274 are meshed with the first end of the third planet carrier 271. The third ring gear 272 is fixed to the housing 1, and the third planet carrier 271 is rotatably connected to the housing 1. The first sun gear 253 is fixedly sleeved on the output shaft 41 of the first motor 21. The first planetary carrier 251 is connected to the third sun gear 273. The second end of the third planetary carrier 271 is meshed with the output gear 42. The clutch includes a second engagement sleeve 53, which is used to engage or disengage the gear shafts of the third ring gear 272 and the third planetary gear 274. Specifically, the outer circumference of the third planetary carrier 271 is provided with a ring of teeth, which can reliably and effectively mesh with the output gear 42. Specifically, in this embodiment, when the first transmission system is working, the second engagement sleeve 53 engages the gear shafts of the third ring gear 272 and the third planetary gear 274. The output shaft 41 of the first motor 21 rotates to provide power. The power is transmitted sequentially through the first sun gear 253, the first planetary gear 252, the first planetary carrier 251, the third sun gear 273, the third planetary gear 274, the third planetary carrier 271, and the output gear 42 to the output shaft 41, and together with the second transmission system, the power is applied to the output shaft 41 and output.

[0058] Optional Embodiment 6: Based on Optional Embodiment 5, the first transmission system may further include a third input shaft 24 and a fourth gear 241. The fourth gear 241 is fixedly mounted on the third input shaft 24, the first planetary carrier 251 is meshed with the fourth gear 241, and the third sun gear 273 is fixedly sleeved on the third input shaft 24. The use of the third input shaft 24 and the fourth gear 241 allows the first planetary gear set 25 and the third planetary gear set 27 to be configured as non-coaxial, and can be staggered according to actual conditions.

[0059] For example, the second transmission system has the following optional implementations:

[0060] Option 1: The second transmission system includes a fourth input shaft 32 and a sixth gear 321. The fourth input shaft 32 is connected to the output shaft 41 of the second motor 31, and the sixth gear 321 is fixed to the fourth input shaft 32, meshing with the output gear 42. Specifically, the fourth input shaft 32 is rotatably disposed within the housing 1. The output shaft 41 of the second motor 31 is connected to the fourth input shaft 32 via a coupling. The sixth gear 321 and the fourth input shaft 32 are effectively fixed by a key and keyway. Specifically, in this embodiment, when the second transmission system is working, the output shaft 41 of the second motor 31 rotates to provide power. The power is transmitted sequentially through the fourth input shaft 32, the sixth gear 321, and the output gear 42 to the output shaft 41, working together with the first transmission system to apply power to the output shaft 41 and output power.

[0061] Option 2: The second transmission system includes a fourth planetary gear set 33. The fourth planetary gear set 33 includes a fourth planetary carrier 331, a plurality of fourth planetary gears 332 mounted on the fourth planetary carrier 331, a fourth sun gear 333 meshing with the plurality of fourth planetary gears 332, and a fourth ring gear 334 meshing with the plurality of fourth planetary gears 332. The fourth ring gear 334 is fixed to the housing 1, the fourth planetary carrier 331 is rotatably connected to the housing 1, the fourth sun gear 333 is fixed to the output shaft 41 of the second motor 31, and the fourth planetary carrier 331 is meshed with the output gear 42. Specifically, by setting the fourth planetary gear set 33 and by fixing and driving different components, multiple transmission ratios can be further achieved. Specifically, the fourth planetary carrier 331 has a ring tooth structure on its outer periphery, which can reliably and effectively mesh with the output gear 42. Specifically in this embodiment, when the second transmission system is working, the output shaft 41 of the second motor 31 rotates to provide power. The power is transmitted to the output shaft 41 in sequence through the fourth sun gear 333, the fourth planet gear 332, the fourth planet carrier 331, and the output gear 42. Together with the first transmission system, the power is applied to the output shaft 41 and output.

[0062] For example, Figures 1 to 7 Specifically, there are seven combinations of the first transmission system and the second conventional system. The different combinations are shown in the table below:

[0063] Figure 1 Optional Implementation Method 1 Optional Implementation Method 2 Figure 2 Optional Implementation Method 2 Optional Implementation Method 2 Figure 3 Optional Implementation Method 1 Optional Implementation Method 1 Figure 4 Optional Implementation Method 3 Optional Implementation Method 2 Figure 5 Optional Implementation Method 4 Optional Implementation Method 2 Figure 6 Optional Implementation Method 5 Optional Implementation Method 1 Figure 7 Optional Implementation Method 6 Optional Implementation Method 2

[0064] For example, in the above Figures 1 to 7In this implementation, the intervention of the first transmission system is controlled. When the torque is low, i.e., the output torque is below 1200-1500 Nm, the gearbox output torque is considered low. At this time, the clutch is disengaged; that is, when the clutch is set to clutch 51, it disengages the fifth gear 242; or when the clutch is set to the first engagement sleeve 52, it disengages the second planetary gear 262 and the second ring gear 264; or when the clutch is set to the second engagement sleeve 53, it disengages the third planetary gear 274 and the third ring gear 272. The first transmission system does not intervene. When the output torque is above 1200-1500 Nm, the gearbox output torque is considered high. At this time, the clutch transmits power to the first transmission system; that is, when the clutch is set to clutch 51, it engages the fifth gear 242; or when the clutch is set to the first engagement sleeve 52, it engages the second planetary gear 262 and the second ring gear 264; or when the clutch is set to the second engagement sleeve 53, it engages the third planetary gear 274 and the third ring gear 272. By calculating the speed ratios of each stage, the speed of the first motor 21 is precisely controlled, thereby providing torque.

[0065] This embodiment also provides a piece of construction machinery. The construction machinery includes the aforementioned gearbox and a chassis. The gearbox housing 1 is mounted on the chassis. Because this construction machinery includes the aforementioned gearbox, it possesses the beneficial effects of such a gearbox, namely, ensuring flexible and efficient power output, a more compact structure, reduced space occupation, convenient inspection and maintenance, and also reducing the safety factor requirements for large gears, lowering the possibility of gear damage, and making it more reliable and durable.

[0066] The construction machinery in this embodiment may include electric loaders, bulldozers, forklifts, and other construction machinery.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A gearbox, characterized in that, include: Box (1); The first input mechanism (2) is located inside the housing (1) and includes a first motor (21) and a first transmission system; The second input mechanism (3) is located inside the housing (1) and includes a second motor (31) and a second transmission system; The output mechanism (4) is located inside the housing (1) and includes an output shaft (41) and an output gear (42) fixedly mounted on the output shaft (41). The first motor (21) is connected to the output gear (42) via the first transmission system, and the second motor (31) is connected to the output gear (42) via the second transmission system; the first transmission system is provided with a clutch, which is used to transmit or disconnect the power of the first transmission system; The first motor (21) and the second motor (31) are located on the same side of the housing (1).

2. The gearbox according to claim 1, characterized in that, The first transmission system includes a first input shaft (22), a second input shaft (23), a third input shaft (24), a first gear (221), a second gear (231), a third gear (232), a fourth gear (241), and a fifth gear (242). The first gear (221) is fixed on the first input shaft (22), the second gear (231) and the third gear (232) are fixed on the second input shaft (23), the fourth gear (241) is fixed on the third input shaft (24), and the fifth gear (242) is movably disposed on the third input shaft (24). The first motor (21) is connected to the first input shaft (22), the first gear (221) is meshed with the second gear (231), the third gear (232) is meshed with the fourth gear (241), the fifth gear (242) is meshed with the output gear (42), and the clutch includes a clutch (51) fixed on the third input shaft (24), the clutch (51) being used to engage or disengage the fifth gear (242).

3. The gearbox according to claim 1, characterized in that, The first transmission system includes a first planetary gear set (25), a third input shaft (24), a fourth gear (241), and a fifth gear (242). The first planetary gear set (25) includes a first planet carrier (251), a plurality of first planet gears (252) disposed on the first planet carrier (251), a first sun gear (253) meshing with the plurality of first planet gears (252), and a first gear ring (254) meshing with the plurality of first planet gears (252). The first gear ring (254) is fixed to the housing (1), the first planet carrier (251) is rotatably connected to the housing (1), the fourth gear (241) is fixed to the third input shaft (24), and the fifth gear (242) is movably disposed on the third input shaft (24). The first sun gear (253) is fixedly sleeved on the output shaft of the first motor (21), the first planet carrier (251) is meshed with the fourth gear (241), the fifth gear (242) is meshed with the output gear (42), and the clutch includes a clutch (51) fixed on the third input shaft (24), the clutch (51) is used to engage or disengage the fifth gear (242).

4. The gearbox according to claim 1, characterized in that, The first transmission system includes a first planetary gear set (25) and a second planetary gear set (26). The first planetary gear set (25) includes a first planet carrier (251), a plurality of first planet gears (252) disposed on the first planet carrier (251), a first sun gear (253) meshing with the plurality of first planet gears (252), and a first ring gear (254) meshing with the plurality of first planet gears (252). The first ring gear (254) is fixed to the housing (1). The first planet carrier ( 251) Rotatably connected to the housing (1), the second planetary gear set (26) includes a second planetary carrier (261), a plurality of second planetary gears (262) disposed on the second planetary carrier (261), a second sun gear (263) meshing with the plurality of second planetary gears (262), and a second gear ring (264) meshing with the plurality of second planetary gears (262). The second gear ring (264) is fixed to the housing (1), and the second planetary carrier (261) is rotatably connected to the housing (1). The first sun gear (253) is fixedly sleeved on the output shaft of the first motor (21). The first planet carrier (251) is connected to the second sun gear (263) in a transmission connection. The second planet carrier (261) is meshed with the output gear (42). The clutch includes a first engagement sleeve (52), which is used to engage or disengage the second planet gear (262) and the second gear ring (264).

5. The gearbox according to claim 4, characterized in that, The first transmission system further includes a third input shaft (24) and a fourth gear (241). The fourth gear (241) is fixedly mounted on the third input shaft (24). The first planet carrier (251) is meshed with the fourth gear (241). The second sun gear (263) is fixedly mounted on the third input shaft (24).

6. The gearbox according to claim 1, characterized in that, The first transmission system includes a first planetary gear set (25) and a third planetary gear set (27). The first planetary gear set (25) includes a first planet carrier (251), a plurality of first planet gears (252) disposed on the first planet carrier (251), a first sun gear (253) meshing with the plurality of first planet gears (252), and a first ring gear (254) meshing with the plurality of first planet gears (252). The first ring gear (254) is fixed to the housing (1). The first planet carrier (251) rotates. Connected to the housing (1), the third planetary gear set (27) includes a third planetary carrier (271), a third ring gear (272), a third sun gear (273), and multiple third planetary gears (274). The third sun gear (273) is meshed with the multiple third planetary gears (274), and the multiple third planetary gears (274) are meshed with the first end of the third planetary carrier (271). The third ring gear (272) is fixed to the housing (1), and the third planetary carrier (271) is rotatably connected to the housing (1). The first sun gear (253) is fixedly sleeved on the output shaft of the first motor (21). The first planet carrier (251) is connected to the third sun gear (273) in a transmission connection. The second end of the third planet carrier (271) is meshed with the output gear (42). The clutch includes a second engagement sleeve (53), which is used to engage or disengage the gear shaft of the third gear ring (272) and the third planet gear (274).

7. The gearbox according to claim 6, characterized in that, The first transmission system further includes a third input shaft (24) and a fourth gear (241). The fourth gear (241) is fixedly mounted on the third input shaft (24). The first planetary carrier (251) is meshed with the fourth gear (241). The third sun gear (273) is fixedly mounted on the third input shaft (24).

8. The gearbox according to claim 1, characterized in that, The second transmission system includes a fourth input shaft (32) and a sixth gear (321). The fourth input shaft (32) is connected to the output shaft of the second motor (31). The sixth gear (321) is fixed on the fourth input shaft (32) and meshes with the output gear (42).

9. The gearbox according to claim 1, characterized in that, The second transmission system includes a fourth planetary gear set (33), which includes a fourth planetary carrier (331), a plurality of fourth planetary gears (332) disposed on the fourth planetary carrier (331), a fourth sun gear (333) meshing with the plurality of fourth planetary gears (332), and a fourth ring gear (334) meshing with the plurality of fourth planetary gears (332). The fourth ring gear (334) is fixed to the housing (1), the fourth planetary carrier (331) is rotatably connected to the housing (1), the fourth sun gear (333) is fixed to the output shaft of the second motor (31), and the fourth planetary carrier (331) is meshed with the output gear (42).

10. An engineering machinery, characterized in that, include: Chassis; The gearbox as described in any one of claims 1-9, wherein the housing (1) is disposed on the chassis.

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