A multi-in-one electric drive assembly of a construction machine

Abstract

The utility model discloses a kind of engineering machinery multi-in-one electric drive assembly, including integrated shell and the walking reducer, walking motor, walking motor controller, hydraulic reducer, hydraulic motor and hydraulic motor controller being arranged in its inside;The front part of integrated shell is horizontally parallel and protrudes and is provided with walking motor port and hydraulic motor port;Walking motor is installed in walking motor port, and its output end is connected with the input end of walking reducer after passing through walking motor port;Hydraulic motor is installed in hydraulic motor port, and its output end is connected with hydraulic reducer after passing through hydraulic motor port.Walking motor, walking reducer and walking motor control component and hydraulic motor, hydraulic reducer and hydraulic motor control component are all adopted integrated design, improve the integration of entire electric drive assembly, avoid whole vehicle redundant arrangement, so that whole vehicle arrangement is more compact, efficiency optimization, superior performance.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to an all-in-one electric drive assembly for engineering machinery. Background Technology

[0002] Electrification is one of the important directions for the green development of construction machinery. Electric construction machinery equipment has been promoted by the market due to its work efficiency, reduced costs, and reduced emissions. The electric drive system of electric construction machinery mainly includes a motor, a gearbox, and a controller. Currently, the mainstream configuration is a combination of a travel motor, a gearbox, and a separately installed controller. This type of electric drive system layout requires space not only for the gearbox and travel motor, but also for the controller and hydraulic motor. The overall electric drive system is large, has an unreasonable structural layout, and low integration. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an all-in-one electric drive assembly for engineering machinery, which integrates the motor, reducer and controller used for walking and hydraulics respectively into a housing, thereby making the overall layout more compact.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An all-in-one electric drive assembly for engineering machinery includes an integrated housing and a travel reducer, a travel motor, a travel motor controller, a hydraulic reducer, a hydraulic motor, and a hydraulic motor controller disposed therein. The front of the integrated housing is horizontally parallel to the protrusions of the walking motor port and the hydraulic motor port; The walking motor is installed in the walking motor port, and its output end extends out of the walking motor port and is connected to the input end of the walking reducer. The walking motor controller includes a walking motor cover and a walking motor control component. The walking motor cover is installed at the walking motor opening and covers the walking motor opening. The walking motor control component is installed on the walking motor cover and is connected to the walking motor control component. The hydraulic motor is installed in the hydraulic motor port, and its output end extends out of the hydraulic motor port and is connected to the hydraulic reducer. The hydraulic motor controller includes a hydraulic motor cover and a hydraulic motor control component. The hydraulic motor cover is installed at the hydraulic motor port and covers the hydraulic motor port. The hydraulic motor control component is installed on the hydraulic motor cover and is connected to the hydraulic motor control component.

[0005] Preferably, the integrated housing includes a housing, a travel cover, and a power take-off cover. The travel motor port and the hydraulic motor port are horizontally and parallelly protruding from the front of the housing. The travel cover is fixedly installed at the rear of the housing and forms a travel reducer cavity between the housing and the housing for installing a travel reducer. The power take-off cover is fixedly installed at the rear of the housing and forms a hydraulic reducer cavity between the housing and the housing for installing a hydraulic reducer.

[0006] Preferably, the walking motor includes a first cooling housing, a walking motor stator, and a walking motor rotor. The first cooling housing is fixedly installed inside the walking motor inlet, and a first cooling flow channel is formed between the first cooling housing and the housing. The walking motor stator is thermally fitted in the inner hole of the first cooling housing, and the walking motor rotor cooperates with the walking motor stator. The hydraulic motor includes a second cooling housing, a hydraulic motor stator, and a hydraulic motor rotor. The second cooling housing is fixedly installed inside the hydraulic motor port, and a second cooling channel is formed between the second cooling housing and the housing. The hydraulic motor stator is thermally fitted in the inner hole of the hydraulic motor port, and the hydraulic motor rotor cooperates with the hydraulic motor stator. The first and second cooling channels are connected by a transition channel, and the cooling pipes are equipped with inlet and outlet nozzles.

[0007] Preferably, the walking motor control assembly is provided with a first water-cooled base, which is connected to a first cooling channel, and the hydraulic motor control assembly is provided with a second water-cooled base, which is connected to a second cooling channel.

[0008] Preferably, the travel reducer includes an input component, an intermediate shaft component, and an output component, wherein, The input component includes a travel input shaft and a travel input gear mounted on the travel input shaft via a spline. The travel motor rotor is mounted on the travel input shaft and is used to input power to the input component. The intermediate shaft component includes an intermediate shaft, an intermediate shaft gear, and an intermediate gear. The intermediate shaft gear is integrally formed at the front of the intermediate shaft. The intermediate shaft gear meshes with the travel input gear, and the intermediate gear is heat-fitted onto the intermediate shaft. The output component includes a travel output shaft and a travel output gear mounted on the travel output shaft via a spline. The travel output gear meshes with an intermediate gear. Output flanges are provided at both ends of the travel output shaft, and the output flanges extend out of the housing.

[0009] Preferably, the input component, intermediate shaft component, and output component are arranged in parallel from top to bottom.

[0010] Preferably, the hydraulic reducer includes a hydraulic input component and a power take-off output component, wherein, The hydraulic input component includes a hydraulic input shaft and a hydraulic input gear mounted on the hydraulic input shaft via splines; The power take-off output component includes a power take-off shaft and a power take-off shaft gear. The power take-off shaft gear is integrally formed on the power take-off shaft and meshes with the hydraulic input gear. The rear end of the power take-off shaft outputs power through an internal spline.

[0011] Preferably, the housing and the travel gearbox cover are provided with oil collection chambers for lubricating the travel reducer.

[0012] Preferably, the travel box cover is provided with a lubrication channel, and a drive pump is installed on the outside of the travel box cover. The drive pump outputs oil and communicates with the lubrication channel provided on the box body. The lubrication channel is used for lubrication of the input components in the travel reducer.

[0013] Preferably, the top of the housing is provided with two high-voltage waterproof connectors, which are respectively connected to the walking motor control component and the hydraulic motor control component. The walking motor control component is connected to the walking motor stator wiring harness in the walking motor through a three-phase power connector, and the hydraulic motor control component is connected to the hydraulic motor stator wiring harness through a three-phase power connector.

[0014] The present invention has the following beneficial effects due to the adoption of the above technical solutions: In the present invention, the travel motor, travel reducer and travel motor control components, as well as the hydraulic motor, hydraulic reducer and hydraulic motor control components are all integrated into one design, which improves the integration of the entire electric drive assembly, avoids redundant layout of the whole vehicle, and makes the whole vehicle layout more compact, with optimized efficiency and superior performance. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0016] Figure 1 This is a schematic diagram of the arrangement structure of this utility model; Figure 2 This is one of the partial exploded structural diagrams of this utility model; Figure 3 This is a second partially exploded structural diagram of the present invention (with the walking motor cover and hydraulic motor cover removed). Figure 4 for Figure 1 A schematic diagram of the structure after removing the cover of the walking motor and the cover of the hydraulic motor.

[0017] Figure label: I. Travel reducer; II. Travel motor; III. Travel motor controller; IV. Hydraulic reducer; V. Hydraulic motor; VI. Hydraulic motor controller; VII. Integrated housing; 1. Input component; 2. Intermediate shaft component; 3. Output component; 4-1. First cooling housing; 4-2. Second cooling housing; 5. Travel motor stator; 6. Travel motor rotor; 8-1. Travel motor cover; 8-2. Hydraulic motor cover; 9. Travel motor control assembly; 10. Hydraulic input component; 11. Power take-off output component; 12. Hydraulic motor stator; 13. Hydraulic motor rotor; 14. Hydraulic motor control assembly; 15. Travel input shaft; 16. Hydraulic input shaft; 17. 18. Travel input gear; 20. Hydraulic input gear; 21. Drive pump; 22. Housing; 211-1. Travel motor port; 211-2. Hydraulic motor port; 23. Travel housing cover; 24. Power take-off housing cover; 25. Power take-off shaft gear; 26. Intermediate shaft gear; 27. Intermediate gear; 28. Travel output gear; 29. ​​Output flange; 30. Travel output shaft; 31. First water-cooled base; 32. Second water-cooled base; 33. Adapter flow channel; 34. Oil collection chamber; 35. Lubrication flow channel. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0020] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] 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.

[0023] like Figures 1 to 4 As shown, this utility model discloses a multi-functional electric drive assembly for engineering machinery, including an integrated housing VII and a travel reducer I, a travel motor II, a travel motor controller III, a hydraulic reducer IV, a hydraulic motor V, and a hydraulic motor controller VI disposed therein; the front of the integrated housing VII has a horizontally parallel protruding travel motor port 211-1 and a hydraulic motor port 211-2; the travel motor II is installed in the travel motor port 211-1, and its output end extends out of the travel motor port 211-1 and connects to the input end of the travel reducer I; the travel motor controller III includes a travel motor cover 8-1 and a travel motor control component 9, the travel motor cover... 8-1 is installed at the travel motor port 211-1 and covers the travel motor port 211-1. The travel motor control component 9 is installed on the travel motor cover 8-1 and is controlled and connected to the travel motor II. The hydraulic motor V is installed in the hydraulic motor port 211-2, and its output end extends out of the hydraulic motor port 211-2 and is connected to the hydraulic reducer IV. The hydraulic motor controller VI includes the hydraulic motor cover 8-2 and the hydraulic motor control component 14. The hydraulic motor cover 8-2 is installed at the hydraulic motor port 211-2 and covers the hydraulic motor port 211-2. The hydraulic motor control component 14 is installed on the hydraulic motor cover 8-2 and is controlled and connected to the hydraulic motor V.

[0024] In this utility model, the travel reducer I, travel motor II, and travel motor controller III are arranged on the same axis, and the hydraulic reducer IV, hydraulic motor V, and hydraulic motor controller VI are arranged on the same axis. The travel reducer I, travel motor II, and travel motor controller III are arranged in parallel with the hydraulic reducer IV, hydraulic motor V, and hydraulic motor controller VI.

[0025] Thus, in this utility model, the travel motor II, travel reducer I, travel motor control component III, hydraulic motor V, hydraulic reducer IV, and hydraulic motor control component VI are all integrated into a single design within the integrated housing VII. The travel motor control component 9 is mounted on the travel motor cover 8-1, and the hydraulic motor control component 14 is mounted on the hydraulic motor cover 8-2. This improves the integration of the entire electric drive assembly. By setting the travel motor II and hydraulic motor V in the horizontally parallel travel motor port 211-1 and hydraulic motor port 211-2 respectively, and arranging the corresponding reducers and motor control components accordingly, the axial width of the integrated housing VII can be effectively reduced, making the electric drive assembly thinner overall. This avoids redundant layout of the entire vehicle, resulting in a more compact overall layout, optimized efficiency, and superior performance.

[0026] In this design, the integrated housing VII includes a housing 21, a travel gearbox cover 22, and a power take-off (PTO) cover 23. The travel motor port 211-1 and the hydraulic motor port 211-2 are horizontally parallel and protrude from the front of the housing 21. The travel gearbox cover 22 is fixedly installed at the rear of the housing 21, forming a travel reducer cavity for mounting the travel reducer III between the two. The PTO cover 23 is fixedly installed at the rear of the housing 21, forming a hydraulic reducer cavity for mounting the hydraulic reducer IV between the two. The travel reducer cavity and the hydraulic reducer cavity within the housing 21 are not interconnected, thus preventing mutual interference during operation and preventing lubrication failure within the reducer.

[0027] like Figure 2 As shown, the travel motor II includes a first cooling housing 4-1, a travel motor stator 5, and a travel motor rotor 6. The first cooling housing 4-1 is fixedly installed inside the travel motor port 211-1. The travel motor stator 5 is thermally fitted into the inner hole of the first cooling housing 4-1, and the travel motor rotor 6 cooperates with the travel motor stator 5. The hydraulic motor V includes a second cooling housing 4-2, a hydraulic motor stator 12, and a hydraulic motor rotor 13. The second cooling housing 4-2 is fixedly installed inside the hydraulic motor port 211-2. The hydraulic motor stator 12 is thermally fitted into the inner hole of the hydraulic motor port 211-2, and the hydraulic motor rotor 13 cooperates with the hydraulic motor stator 12. Through the interaction between the stator and the rotor, electromagnetic torque is generated, which inputs power into the travel reducer I and the hydraulic reducer IV.

[0028] The walking motor control component 9 and the hydraulic motor control component 14 each include a three-phase terminal block, an electrical control board, and a capacitor assembly. The walking motor control component 9 is connected to the stator wiring harness of the walking motor II through its corresponding three-phase terminal block, and the hydraulic motor control component 14 is connected to the stator wiring harness of the hydraulic motor through its corresponding three-phase terminal block, thereby forming a stable connection between the motor and the control components. The top of the housing 21 is equipped with two high-voltage waterproof connectors, which are respectively connected to the walking motor control component 9 and the hydraulic motor control component 14.

[0029] A first cooling channel is formed between the first cooling housing 4-1 and the casing 21, and a second cooling channel is formed between the second cooling housing 4-2 and the casing 21. The first and second cooling channels are connected by a transition channel 34. Figure 4 As shown, the walking motor control component 9 is provided with a first water-cooled seat 32, which is connected to the first cooling channel. The hydraulic motor control component 14 is provided with a second water-cooled seat 33, which is connected to the second cooling channel. In this way, the first cooling channel, the second cooling channel, the first water-cooled seat 32 and the second water-cooled seat 33 are connected through cooling pipes, thereby achieving cooling of the walking motor II, the hydraulic motor V, the walking motor control component 9 and the hydraulic motor control component 14. The housing 21 is provided with a water inlet for water to enter the cooling pipes and a water outlet for water to exit the cooling pipes.

[0030] To increase the cooling efficiency of the travel motor II and the hydraulic motor V, such as Figure 2 As shown, the outer surface of the first cooling shell 4-1 is provided with a spiral groove, and the outer surface of the second cooling shell 4-2 is provided with a spiral groove, which can increase the flow area and water volume of cooling water in the first and second cooling channels.

[0031] like Figure 2 and Figure 3As shown, the travel reducer I includes an input component 1, an intermediate shaft component 2, and an output component 3 arranged in parallel from top to bottom. The input component 1 includes a travel input shaft 15 and a travel input gear 17 mounted on the travel input shaft 15 via splines. Both ends of the travel input shaft 15 are supported by bearings on the inner wall of the integrated housing VII. The travel motor rotor 6 and a rotary transformer are mounted on the travel input shaft 15 and used to input power to the travel input shaft 15. Specifically, in this design, the travel motor rotor 6 and the travel input shaft 15 are integrated. The intermediate shaft component 2 includes an intermediate shaft, an intermediate shaft gear 25, and an intermediate gear 26. Both ends of the shaft are supported on the inner wall of the integrated housing VII by bearings. The front part of the intermediate shaft is integrally formed with an intermediate shaft gear 25, which meshes with the walking input gear 17. The intermediate gear 26 is heat-fitted on the rear part of the intermediate shaft. The output component 3 includes a walking output shaft 29 and a walking output gear 27 mounted on the walking output shaft 29 by splines. Both ends of the walking output shaft 29 are supported on the inner wall of the integrated housing VII by bearings. The walking output gear 27 meshes with the intermediate gear 26. Both ends of the walking output shaft 29 are provided with output flanges 28, which extend out of the housing 21, thereby realizing the power output of the walking reducer I.

[0032] like Figure 2 As shown, the intermediate shaft gear 25 and the travel output gear 27 partially overlap, which effectively reduces the size of the travel reducer I. Furthermore, the travel reducer I effectively utilizes the space of the housing 21 below the hydraulic reducer IV, further making the overall vehicle layout more compact.

[0033] The hydraulic reducer IV includes a hydraulic input component 10 and a power take-off (PTO) output component 11. The hydraulic input component 10 includes a hydraulic input shaft 16 and a hydraulic input gear 18 mounted on the hydraulic input shaft 16 via a spline. A hydraulic motor rotor 13 and a rotary transformer are mounted on the hydraulic input shaft 16 and used to input power to the hydraulic input component 10. Specifically, in this design, the hydraulic motor rotor 13 and the hydraulic input shaft 16 are integrated. The PTO output component 11 includes a power take-off shaft and a power take-off shaft gear 24. The power take-off shaft gear 24 is integrally formed on the power take-off shaft and meshes with the hydraulic input gear 18. The rear end of the power take-off shaft is connected to an external hydraulic pump via an internal spline, thereby realizing the power output of the hydraulic reducer IV.

[0034] like Figure 3As shown, the housing 21 and the travel cover 22 are provided with oil collection chambers 35 for lubricating the travel reducer I. The oil collection chambers 35 are used for lubricating the shaft ends of each shaft inside the travel reducer. The travel cover 22 is provided with a lubrication channel 36. A drive pump 20 is installed on the outside of the travel cover 22. The drive pump 20 outputs oil and communicates with the lubrication channel 36 provided on the housing 21. The lubrication channel 36 is used for forced lubrication of the gears and bearings on the input component 1 in the travel reducer I.

[0035] All features described in the specification, appended claims and drawings, whether individually or in any combination thereof, are essential features of this utility model.

[0036] The technical solutions described in this utility model also include any one or more specific features, structures, materials or characteristics described above, formed individually or in combination.

[0037] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, alterations, deletions of some features, additions of features, or recombinations of features to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the innovative principles of the present invention shall still fall within the scope of the technical solutions of the present invention.

Claims

1. A multi-functional electric drive assembly for engineering machinery, characterized in that, It includes an integrated housing (VII) and a travel reducer (I), a travel motor (II), a travel motor controller (III), a hydraulic reducer (IV), a hydraulic motor (V), and a hydraulic motor controller (VI) disposed therein. The front of the integrated housing (VII) is provided with a horizontally parallel protrusion for a walking motor port (211-1) and a hydraulic motor port (211-2). The walking motor (II) is installed in the walking motor port (211-1), and its output end passes through the walking motor port (211-1) and is connected to the input end of the walking reducer (I). The walking motor controller (III) includes a walking motor cover (8-1) and a walking motor control component (9). The walking motor cover (8-1) is installed at the walking motor port (211-1) and covers the walking motor port (211-1). The walking motor control component (9) is installed on the walking motor cover (8-1) and is connected to the walking motor (II) for control. The hydraulic motor (V) is installed in the hydraulic motor port (211-2), and its output end passes through the hydraulic motor port (211-2) and is connected to the hydraulic reducer (IV). The hydraulic motor controller (VI) includes a hydraulic motor cover (8-2) and a hydraulic motor control component (14). The hydraulic motor cover (8-2) is installed at the hydraulic motor port (211-2) and covers the hydraulic motor port (211-2). The hydraulic motor control component (14) is installed on the hydraulic motor cover (8-2) and is controlled and connected to the hydraulic motor (V).

2. The all-in-one electric drive assembly for engineering machinery according to claim 1, characterized in that, The integrated housing (VII) includes a housing (21), a travel cover (22), and a power take-off cover (23). The travel motor port (211-1) and the hydraulic motor port (211-2) are horizontally parallel and protrude from the front of the housing (21). The travel cover (22) is fixedly installed at the rear of the housing (21) and forms a travel reducer cavity for installing the travel reducer (III) between the housing (21) and the housing (21). The power take-off cover (23) is fixedly installed at the rear of the housing (21) and forms a hydraulic reducer cavity for installing the hydraulic reducer (IV) between the housing (21) and the housing (21).

3. The all-in-one electric drive assembly for engineering machinery according to claim 2, characterized in that, The walking motor (II) includes a first cooling housing (4-1), a walking motor stator (5) and a walking motor rotor (6). The first cooling housing (4-1) is fixedly installed inside the walking motor port (211-1). A first cooling channel is formed between the first cooling housing (4-1) and the housing (21). The walking motor stator (5) is thermally fitted in the inner hole of the first cooling housing (4-1). The walking motor rotor (6) cooperates with the walking motor stator (5). The hydraulic motor (V) includes a second cooling housing (4-2), a hydraulic motor stator (12), and a hydraulic motor rotor (13). The second cooling housing (4-2) is fixedly installed inside the hydraulic motor port (211-2). A second cooling channel is formed between the second cooling housing (4-2) and the housing (21). The hydraulic motor stator (12) is thermally fitted in the inner hole of the hydraulic motor port (211-2). The hydraulic motor rotor (13) is engaged with the hydraulic motor stator (12). The first and second cooling channels are connected by a transition channel (34), and the cooling pipes are equipped with an inlet and an outlet.

4. The all-in-one electric drive assembly for engineering machinery according to claim 3, characterized in that, The walking motor control assembly (9) is provided with a first water-cooled seat (32), which is connected to the first cooling channel. The hydraulic motor control assembly (14) is provided with a second water-cooled seat (33), which is connected to the second cooling channel.

5. The all-in-one electric drive assembly for engineering machinery according to claim 3, characterized in that, The travel reducer (I) includes an input component (1), an intermediate shaft component (2), and an output component (3), wherein, The input component (1) includes a travel input shaft (15) and a travel input gear (17) mounted on the travel input shaft (15) via a spline. The travel motor rotor (6) is mounted on the travel input shaft (15) and is used to input power to the input component (1). The intermediate shaft component (2) includes an intermediate shaft, an intermediate shaft gear (25) and an intermediate gear (26). The intermediate shaft has an integrally formed intermediate shaft gear (25) at the front. The intermediate shaft gear (25) meshes with the walking input gear (17). The intermediate gear (26) is heat-fitted onto the intermediate shaft. The output component (3) includes a travel output shaft (29) and a travel output gear (27) mounted on the travel output shaft (29) via a spline. The travel output gear (27) meshes with the intermediate gear (26). The two ends of the travel output shaft (29) are provided with output flanges (28), which extend out of the housing (21).

6. The all-in-one electric drive assembly for engineering machinery according to claim 5, characterized in that, The input component (1), intermediate shaft component (2), and output component (3) are arranged in parallel from top to bottom.

7. The all-in-one electric drive assembly for engineering machinery according to claim 3, characterized in that, The hydraulic reducer (IV) includes a hydraulic input component (10) and a power take-off output component (11), wherein, The hydraulic input component (10) includes a hydraulic input shaft (16) and a hydraulic input gear (18) mounted on the hydraulic input shaft (16) via a spline. The power take-off output component (11) includes a power take-off shaft and a power take-off shaft gear (24). The power take-off shaft gear (24) is integrally formed on the power take-off shaft. The power take-off shaft gear (24) meshes with the hydraulic input gear (18). The rear end of the power take-off shaft outputs power through an internal spline.

8. The all-in-one electric drive assembly for engineering machinery according to claim 2, characterized in that, The housing (21) and the travel cover (22) are provided with oil collection chambers for lubricating the travel reducer (I).

9. The all-in-one electric drive assembly for engineering machinery according to claim 2, characterized in that, The walking box cover (22) is provided with a lubrication channel (36), and a drive pump (20) is installed on the outside of the walking box cover (22). The drive pump (20) outputs oil and communicates with the lubrication channel (36) provided on the box body. The lubrication channel (36) is used to lubricate the input component (1) in the walking reducer (I).

10. The all-in-one electric drive assembly for engineering machinery according to claim 2, characterized in that, The top of the housing (21) is provided with two high-voltage waterproof connectors. The two high-voltage waterproof connectors are connected to the walking motor control component (9) and the hydraulic motor control component (14) respectively. The walking motor control component (9) is connected to the walking motor stator harness in the walking motor (II) through a three-phase electrical connector. The hydraulic motor control component (14) is connected to the hydraulic motor stator harness through a three-phase electrical connector.

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