A gearbox assembly for dual-motor driven engineering machinery

Abstract

The present invention relates to a gearbox assembly for dual-motor driven engineering machinery, comprising a housing, a first input shaft and an output shaft rotatably mounted in the housing, a first drive motor mounted on the housing for driving the first input shaft, a first clutch mounted in the housing, a transmission assembly mounted on the first input shaft for driving a driving plate of the first clutch for rotation, a reduction mechanism mounted in the housing, the driving plate of the first clutch being in transmission connection with the reduction mechanism, a second clutch mounted in the housing for transmitting power from the reduction mechanism to the output shaft, a second input shaft rotatably mounted in the housing, a second drive motor mounted on the housing for driving the second input shaft for rotation, a second transmission gear mounted on the second input shaft, the second transmission gear meshing with the driving plate of the first clutch. This gearbox utilizes two motors for power output, and the two motors can operate simultaneously to drive the output shaft, providing sufficient power, reliable operation, and convenient maintenance.

Description

Technical Field

[0001] The present invention relates to the field of engineering machinery, and in particular to a gearbox assembly for dual-motor driven engineering machinery. Background Art

[0002] Engineering machinery such as excavators and loaders are widely used in various basic construction projects such as civil engineering and water conservancy projects. Traditional engineering machinery consumes a lot of power during operation. With the rapid development of the new energy market in recent years, new energy has also ushered in rapid development in the field of engineering machinery.

[0003] Currently, both the traveling and working devices of construction machinery require a drive system. Existing solutions all use independent power drive systems, which require a large layout space, are inconvenient to arrange and maintain, and require many connecting parts. They have disadvantages such as high cost and low reliability, and need to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a gearbox assembly for dual-motor driven engineering machinery that is easy to maintain and has sufficient power to address the above problems.

[0005] To achieve the above-mentioned purpose, the present invention discloses a gearbox assembly for dual-motor driven engineering machinery, including a housing, whose structural features are: a first input shaft and an output shaft are rotatably installed in the housing, a first drive motor for driving the first input shaft to rotate is installed on the housing, a first clutch is installed in the housing, the driven plate of the first clutch is fixedly connected to the output shaft, a transmission component for driving the active plate of the first clutch to rotate is installed on the first input shaft, a reduction mechanism is also installed in the housing, the active plate of the first clutch is transmission-connected to the reduction mechanism, and a second clutch for transmitting the power of the reduction mechanism to the output shaft is installed in the housing.

[0006] With the above structure, the first gear of the transmission corresponds to the second clutch, and the second gear of the transmission corresponds to the first clutch. When the transmission is in the first gear state, the first drive motor drives the first input shaft to rotate, and the first input shaft drives the driving plate of the first clutch to rotate through the transmission assembly. Since the driving plate and the driven plate of the first clutch are in a disengaged state at this time, the driving plate of the first clutch rotates idly, and the driving plate of the first clutch only drives the reduction mechanism to operate. At this time, the driving plate and the driven plate of the second clutch are in a coupled state, and the power of the reduction mechanism can be normally transmitted to the output shaft, and the power is output outwardly from the output shaft. When the transmission is in the second gear state, the first drive motor drives the first input shaft to rotate, and the first input shaft drives the driving plate of the first clutch to rotate through the transmission assembly. At this time, the driving plate and the driven plate of the second clutch are in a coupled state, and the power of the reduction mechanism cannot be normally transmitted to the output shaft. The driving plate and the driven plate of the first clutch are in a coupled state, and the driving plate of the first clutch transmits power to the output shaft through the driven plate, and the power is output outwardly from the output shaft.

[0007] Regarding the specific structure of the reduction mechanism, the reduction mechanism includes a sun gear rotatably mounted on the output shaft, the sun gear is transmission-connected to the driving plate of the first clutch, a planet carrier is fixedly mounted on the output shaft, a plurality of planetary gears are mounted on the planet carrier, the plurality of planetary gears are arranged around the sun gear, the plurality of planetary gears are all meshed with the sun gear, a ring gear is rotatably mounted in the housing, the ring gear is sleeved on the outside of the plurality of planetary gears, and the ring gear is meshed with the plurality of planetary gears.

[0008] Regarding the installation structure of the second clutch, the second clutch is located outside the ring gear, and the ring gear is installed on the driven plate of the second clutch.

[0009] The transmission assembly includes a first transmission gear mounted on the first input shaft. The driving plate of the first clutch is equipped with teeth capable of meshing with the first transmission gear. The first transmission gear meshes with the driving plate of the first clutch for transmission. When the transmission is in second gear, the driving plate and driven plate of the second clutch are disengaged. The driving plate of the first clutch can drive the sun gear to rotate, but because the ring gear is not fixed and can rotate, the planetary gears cannot mesh with the sun gear properly, and the sun gear's power cannot be transmitted to the planetary carrier. When the transmission is in first gear, the driving plate and driven plate of the second clutch are engaged, and the ring gear is fixed. The planetary gears can mesh with the sun gear and ring gear for rotation, and the sun gear's power can be transmitted normally to the planetary carrier, which then transmits the power to the output shaft.

[0010] Preferably, a second input shaft is rotatably mounted in the housing, a second drive motor is mounted on the housing for driving the second input shaft, a second transmission gear is mounted on the second input shaft, and the second transmission gear meshes with the driving plate of the first clutch. The integration of the two motors into the transmission housing provides more robust transmission power and allows the transmission to operate in multiple operating modes.

[0011] Preferably, a transmission oil supply pump is installed on the housing, and the input shaft of the transmission oil supply pump extends into the housing and is coaxially connected to the first input shaft. During operation, the first input shaft drives the transmission oil supply pump to operate, and the transmission oil supply pump implements oil supply.

[0012] Preferably, a one-way clutch is mounted on the first input shaft, and the first transmission gear is mounted on the one-way clutch. When the vehicle is in a forward gear, the first and second drive motors are both in a forward rotation state. When the vehicle is in a reverse gear, the second drive motor is in a reverse rotation state. At this time, the first drive motor stops rotating. Since the driving plate of the first clutch drives the first transmission gear to rotate in reverse, the one-way clutch can prevent power from the first transmission gear from being transmitted to the first input shaft, thereby preventing the transmission oil pump and gear pump from rotating in reverse.

[0013] Preferably, a power take-off shaft is rotatably mounted in the housing, with a third transmission gear mounted on both the power take-off shaft and the first input shaft. The two third transmission gears mesh with each other, and the end of the power take-off shaft protrudes from the housing. The power take-off shaft can be used for power output. For example, a gear pump can be mounted on the transmission, and the gear pump's input shaft can be mated with the power take-off shaft, so that the power take-off shaft drives the gear pump. Furthermore, the power take-off shaft can drive other devices, thereby making the transmission's power output more flexible.

[0014] Preferably, a transmission valve group for controlling the movement of the first clutch and the second clutch is installed on the housing. The separation or engagement of the first clutch and the second clutch is controlled by the transmission valve group.

[0015] Regarding the power output of the gearbox, both ends of the output shaft protrude from the gearbox, and the front output flange and rear output flange are respectively installed at both ends of the output shaft protruding from the gearbox. The power of the gearbox is output outward through the front output flange and the rear output flange.

[0016] To sum up, the beneficial effects of the present invention are as follows: two motors are integrated into the gearbox, and the two motors can run at the same time, driving the output shaft to work together, so that the gearbox power is more sufficient, and the gearbox can operate in multiple working states; the gearbox is provided with a power take-off shaft and a first input shaft, both of which can realize power output, driving the gearbox oil pump and working device to operate; the first gear adopts a parallel shaft plus a planetary gear system for deceleration, and the second gear directly adopts a parallel shaft for deceleration; flanges are provided at both ends of the output shaft to enable dual power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the local structure in the middle D direction;

[0019] Figure 3 Schematic diagram of the external structure of the gearbox;

[0020] Figure 4 For the Figure 3 Schematic diagram of the cross-sectional structure along the middle BB line;

[0021] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure of point C in the middle;

[0022] Figure 6 It is a schematic diagram of the transmission principle of the present invention.

[0023] In the figure: box body 1, lifting ring 2, breather plug 3, power take-off shaft 4, hexagonal head bolt 5, box cover 6, first input shaft 7, transmission oil pump 8, end cover 9, output shaft 10, front output flange 11, first drive motor 12, second drive motor 13, rear output flange 14, first transmission gear 15, first clutch 16, transmission valve group 17, second clutch 18, gear pump 19, third transmission gear 20, 2nd gear oil inlet pipeline 21, one-way clutch 22, second transmission gear 23, ring gear 24, brake fixing bolt 25, brake assembly 26, transmission pump oil outlet pipeline 27, filter assembly 28, transmission valve group oil inlet pipeline 29, speed sensor 30, second input shaft 31, sun gear 32, planetary gear 33, planetary carrier 34. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

[0029] A gearbox assembly for dual-motor driven engineering machinery includes a housing 1, in which a first input shaft 7 and an output shaft 10 are rotatably mounted, a first drive motor 12 for driving the first input shaft 7 to rotate is mounted on the housing 1, a first clutch 16 is mounted in the housing 1, a driven disc of the first clutch 16 is fixedly connected to the output shaft 10, a transmission assembly for driving the active disc of the first clutch 16 to rotate is mounted on the first input shaft 7, a reduction mechanism is also mounted in the housing 1, the active disc of the first clutch 16 is in transmission connection with the reduction mechanism, and a second clutch 18 for transmitting the power of the reduction mechanism to the output shaft 10 is mounted in the housing 1. Figure 1 , attached Figure 1 Along Figure 3 AA line cross-sectional structural diagram in FIG, after adopting the above structure, when the transmission is in the first gear state, the first drive motor 12 drives the first input shaft 7 to rotate, and the first input shaft 7 drives the driving plate of the first clutch 16 to rotate through the transmission assembly. Since the driving plate and the driven plate of the first clutch 16 are in a disengaged state at this time, the driving plate of the first clutch 16 is idle, and the driving plate of the first clutch 16 only drives the reduction mechanism to operate. At this time, the driving plate and the driven plate of the second clutch 18 are in a coupled state, and the power of the reduction mechanism can be normally transmitted to the output shaft 10, and the power is output outwardly from the output shaft 10; when the transmission is in the second gear state, the first drive motor 12 drives the first input shaft 7 to rotate, and the first input shaft 7 drives the driving plate of the first clutch 16 to rotate through the transmission assembly. At this time, the driving plate and the driven plate of the second clutch 18 are in a coupled state, and the driving plate of the first clutch 16 transmits power to the output shaft 10 through the driven plate, and the power is output outwardly from the output shaft 10.

[0030] Refer to the attached Figure 5 , Attachment Figure 6 Regarding the specific structure of the reduction mechanism, the reduction mechanism includes a sun gear 32 rotatably mounted on the output shaft 10, the sun gear 32 is transmission-connected to the driving plate of the first clutch 16, a planet carrier 34 is fixedly mounted on the output shaft 10, a plurality of planetary gears 33 are mounted on the planet carrier 34, the plurality of planetary gears 33 are arranged around the sun gear 32, and the plurality of planetary gears 33 are all meshed with the sun gear 32, a ring gear 24 is rotatably mounted in the housing 1, the ring gear 24 is sleeved on the outside of the plurality of planetary gears 33, and the ring gear 24 is meshed with the plurality of planetary gears 33.

[0031] Refer to the attached Figure 1 , Attachment Figure 5 Regarding the mounting structure of the second clutch 18 , the second clutch 18 is located outside the ring gear 24 , and the ring gear 24 is mounted on the driven plate of the second clutch 18 .

[0032] Refer to the attached Figure 1 , Attachment Figure 6 The transmission assembly includes a first transmission gear 15 mounted on the first input shaft 7. The driving plate of the first clutch 16 is provided with teeth capable of meshing with the first transmission gear 15. The first transmission gear 15 meshes with the driving plate of the first clutch 16 for transmission. When the transmission is in second gear, the driving plate and the driven plate of the second clutch 18 are disengaged. At this time, the driving plate of the first clutch 16 can drive the sun gear 32 to rotate. However, because the ring gear 24 is not fixed and can rotate, the planetary gears 33 cannot properly mesh with the sun gear 32 for transmission, and the power of the sun gear 32 cannot be transmitted to the planetary carrier 34. When the transmission is in first gear, the driving plate and the driven plate of the second clutch 18 are engaged. At this time, the ring gear 24 is fixed. The planetary gears 33 can mesh with the sun gear 32 and the ring gear 24 for rotation. The power of the sun gear 32 can be normally transmitted to the planetary carrier 34, which then transmits the power to the output shaft 10.

[0033] Refer to the attached Figure 3 A second input shaft 31 is rotatably mounted in the transmission housing 1. A second drive motor 13 is mounted on the transmission housing 1 to drive the second input shaft 31. A second transmission gear 23 is mounted on the second input shaft 31, and the second transmission gear 23 engages the driving plate of the first clutch 16. The integration of the two motors in the transmission housing 1 provides the transmission with more power and allows the transmission to operate in multiple operating modes.

[0034] Refer to the attached Figure 1 A transmission oil pump 8 is installed on the housing 1, and the input shaft of the transmission oil pump 8 extends into the housing 1 and is coaxially connected to the first input shaft 7. During the working process, the first input shaft 7 drives the transmission oil pump 8 to operate, and the transmission oil pump 8 implements oil supply. A one-way clutch 22 is sleeved on the first input shaft 7, and the first transmission gear 15 is installed on the one-way clutch 22. When the vehicle is in the forward gear, the first drive motor 12 and the second drive motor 13 are both in the forward running state. When the vehicle is in the reverse gear, the second drive motor 13 is in the reverse running state. At this time, the first drive motor 12 stops. Since the active disk of the first clutch 16 will drive the first transmission gear 15 to reverse, the one-way clutch 22 can prevent the power of the first transmission gear 15 from being transmitted to the first input shaft 7, preventing the transmission oil pump 8 and the gear pump 19 from reversing.

[0035] Refer to the attached Figure 1A power take-off shaft 4 is rotatably mounted in the housing 1. A third transmission gear 202 is mounted on both the power take-off shaft 4 and the first input shaft 7. The two third transmission gears 202 mesh with each other, and the end of the power take-off shaft 4 protrudes out of the housing 1. The power take-off shaft 4 can be used for power output. For example, if a gear pump 19 is mounted on the transmission and its input shaft is mated to the power take-off shaft 4, the power take-off shaft 4 can drive the gear pump 19. Furthermore, the power take-off shaft 4 can also drive other devices, making the transmission's power output more flexible.

[0036] Refer to the attached Figure 4 , Attachment Figure 5 The transmission housing 1 is equipped with a transmission valve assembly 17 for controlling the operation of the first clutch 16 and the second clutch 18. The oil inlet of the transmission valve assembly 17 is connected to the transmission valve assembly oil inlet pipeline 29. The oil in the transmission valve assembly 17 is provided by the transmission oil pump 8. The disengagement or engagement of the first clutch 16 and the second clutch 18 is controlled by the transmission valve assembly 17.

[0037] Refer to the attached Figure 1 Regarding the power output of the gearbox, both ends of the output shaft 10 protrude from the box body 1, and the two ends of the output shaft 10 protruding from the box body 1 are respectively installed with a front output flange 11 and a rear output flange 14. The power of the gearbox is output outward through the front output flange 11 and the rear output flange 14.

[0038] Refer to the attached Figure 1 The housing 1 is open to one side and sealed by a cover 6. The housing 1 and cover 6 are fixed together by hexagonal bolts 5. The cover 6 has a retaining hole for the output shaft 10 to pass through. The retaining hole is sealed by an end cap 9. The output shaft 10 extends outward through the end cap 9. A lifting ring 2 is provided on the top of the housing 1 to facilitate the fixing and movement of the gearbox. A vent hole is also provided on the top of the housing 1 to balance the air pressure inside and outside the gearbox. The vent hole is sealed by a vent plug 3.

[0039] Refer to the attached Figure 2 A brake assembly 26 is mounted on the housing 1 and fixedly connected to the housing 1 via brake fixing bolts 25. A speed pump outlet pipeline 27 is mounted on the transmission oil supply pump 8, which in turn is connected to a transmission valve block oil inlet pipeline 29. A filter assembly 28 is installed between the speed pump outlet pipeline 27 and the transmission valve block oil inlet pipeline 29, filtering the oil. The transmission valve block oil inlet pipeline 29 is connected to the transmission valve block 17, thereby supplying oil to the transmission valve block 17 via the transmission oil supply pump 8. A speed sensor 30 is mounted on the transmission to detect the speed of the output shaft 10.

[0040] Refer to the attached Figure 1The gearbox is provided with a 2nd gear oil inlet pipeline 21. When the driver starts the 2nd gear, the oil enters the first clutch 16 through the 2nd gear oil inlet pipeline 21, causing the driving plate and the driven plate of the first clutch 16 to be combined. The operating principle of the second clutch 18 is the same as that of the first clutch 16.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A gearbox assembly for dual-motor driven engineering machinery, comprising a housing (1), characterized in that The housing (1) is provided with a first input shaft (7) and an output shaft (10) which are rotatably mounted therein, a first drive motor (12) for driving the first input shaft (7) to rotate is mounted on the housing (1), a first clutch (16) is mounted in the housing (1), a driven disc of the first clutch (16) is fixedly connected to the output shaft (10), a transmission assembly for driving the active disc of the first clutch (16) to rotate is mounted on the first input shaft (7), a reduction mechanism is further mounted in the housing (1), the active disc of the first clutch (16) is in transmission connection with the reduction mechanism, and a second clutch (18) for transmitting the power of the reduction mechanism to the output shaft (10) is mounted in the housing (1); The reduction mechanism includes a sun gear (32) rotatably mounted on the output shaft (10), the sun gear (32) being in driving connection with the driving plate of the first clutch (16), a planet carrier (34) being fixedly mounted on the output shaft (10), a plurality of planetary gears (35) being mounted on the planet carrier (34), the plurality of planetary gears (35) being arranged around the sun gear (32), the plurality of planetary gears (35) being meshed with the sun gear (32), a ring gear (24) being rotatably mounted in the housing (1), the ring gear (24) being sleeved on the outside of the plurality of planetary gears (35), the ring gear (24) being meshed with the plurality of planetary gears (35); The second clutch (18) is located outside the ring gear (24), and the ring gear (24) is mounted on the driven plate of the second clutch (18); The transmission assembly includes a first transmission gear (15) mounted on a first input shaft (7), a driving disc of a first clutch (16) is provided with teeth capable of meshing with the first transmission gear (15), and the first transmission gear (15) meshes with the driving disc of the first clutch (16) for transmission; A second input shaft (31) is rotatably mounted in the housing (1), a second drive motor (13) for driving the second input shaft (31) to rotate is mounted on the housing (1), a second transmission gear (23) is mounted on the second input shaft (31), and the second transmission gear (23) is engaged with the driving disc of the first clutch (16).

2. The gearbox assembly for dual-motor driven engineering machinery according to claim 1, characterized in that: A transmission oil supply pump (8) is mounted on the housing (1), and an input shaft of the transmission oil supply pump (8) extends into the housing (1) and is coaxially connected to the first input shaft (7).

3. The gearbox assembly for dual-motor driven engineering machinery according to claim 1, characterized in that: A one-way clutch (22) is sleeved on the first input shaft (7), and the first transmission gear (15) is mounted on the one-way clutch (22).

4. The gearbox assembly for dual-motor driven engineering machinery according to claim 1, characterized in that: A power take-off shaft (4) is rotatably mounted in the housing (1), and a third transmission gear (20) is mounted on both the power take-off shaft (4) and the first input shaft (7). The two third transmission gears (20) are meshed with each other, and the end of the power take-off shaft (4) protrudes out of the housing (1).

5. The gearbox assembly for dual-motor driven engineering machinery according to claim 1, characterized in that: A transmission valve group (17) for controlling the actions of the first clutch (16) and the second clutch (18) is installed on the box body (1).

6. The gearbox assembly for dual-motor driven engineering machinery according to any one of claims 1 to 5, characterized in that: Both ends of the output shaft (10) protrude from the box body (1), and a front output flange (11) and a rear output flange (14) are respectively installed at both ends of the output shaft (10) protruding from the box body (1).

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