Integrated high-speed electric rotary system

Abstract

An integrated high-speed electric rotary system comprises a motor, a high-speed reducer, a brake and a low-speed reducer which are in transmission connection in sequence, the motor is electrically connected with a controller, the integrated high-speed electric rotary system further comprises an oil pump, the oil pump is connected with a shell of the high-speed reducer through an oil pipe, and the two ends of the oil pipe are provided with a first connector and a second connector respectively. The first interface is connected with the upper part of the high-speed reducer shell; the second interface is connected with the lower part of the high-speed reducer shell; the first connector is communicated with a first oil duct, the first oil duct is connected with the tops of shaft holes in the high-speed reducer, the high-speed reducer is communicated with the brake through a second oil duct, and the bottom of an input shaft hole of the brake is communicated with the second connector. According to the electric rotation system, the external oil pump is adopted for active lubrication, oil can enter from the tops of all shaft holes of the high-speed reducer, fully flows in the high-speed reducer, enters an input shaft of a brake and then circularly flows out, and therefore bearings and gear shafts of a high-speed transmission part in the system are precisely lubricated.

Description

Technical Field

[0001] The present invention relates to the field of electric drive systems for engineering machinery, and in particular to an integrated high-speed electric rotary system. Background Art

[0002] Against the backdrop of the carbon neutrality agreement, the electrification of both on-road and off-road equipment has become a future development trend. As rotary machinery is widely used in production processes, its electrification has become an inevitable trend as noise and emission requirements in application scenarios, coupled with energy conservation and emission reduction policies, increase. When designing an electric rotary system, cost must be minimized to maximize profits. The limited installation space of the vehicle also needs to be considered. This places certain demands on the high speed and high integration of the electric drive system, as well as higher requirements on the system's lubrication method and efficiency under high-speed oil stirring.

[0003] A search revealed related literature on electric drive systems. For example, the invention patent publication number is "CN119298514A," titled "Motor Drive Assembly and Vehicle." The system's internal lubrication system includes a main oil supply passage and a first branch passage within the housing. The main oil supply passage is arranged on one radial side of the housing and communicates with the stator windings. The first branch passage is located between the motor cavity and the reduction cavity. One end of the first branch passage communicates with the main oil supply passage, and the other end of the first branch passage communicates with the reduction cavity.

[0004] For example, the utility model authorization announcement document with publication number "CN218577514U" and the name "Reduction gearbox assembly for electric drive axle adapted for high-speed coasting conditions". Its internal lubrication system design is that an oil channel is provided on the output shaft, and the oil channel includes an oil inlet and an oil outlet. The output shaft on both sides of the rolling bearing is provided with an oil outlet. The oil inlet is connected to an oil pump. The oil pump is used to pump the lubricating oil in the oil storage chamber into the oil inlet. The oil storage chamber is located inside the main housing. The internal lubrication system involved in the above existing technical solutions is not applicable to electric drive rotary systems with relatively complex rotation reduction stages, and cannot provide sufficient lubrication for the internal transmission shafts and brakes. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides an integrated high-speed electric rotation system, comprising a motor, a high-speed reducer, a brake and a low-speed reducer that are sequentially connected in transmission, the motor and the controller are electrically connected, and also includes an oil pump, which is connected to the high-speed reducer housing through an oil pipe, and the two ends of the oil pipe are respectively a first interface and a second interface, the first interface is connected to the upper part of the high-speed reducer housing, and the second interface is connected to the lower part of the high-speed reducer housing; the first interface is connected to the first oil channel, the first oil channel is connected to the top of each shaft hole in the high-speed reducer, the high-speed reducer and the brake are connected through the second oil channel, and the bottom of the brake input shaft hole is connected to the second interface.

[0006] Furthermore, the first oil passage is distributed vertically along the axis of the high-speed reducer input shaft hole, and the second oil passage is distributed along the axis direction of the brake input shaft hole.

[0007] Furthermore, the high-speed reducer is a parallel shaft reducer, including a high-speed reducer intermediate shaft hole and a high-speed reducer output shaft hole, and the second oil channel is a second oil hole opened at the bottom of the high-speed reducer housing and distributed circumferentially along the high-speed reducer output shaft hole.

[0008] Furthermore, the first oil passage has a first branch connected to the top of the input shaft hole of the high-speed reducer, and also has a second branch connected to the intermediate shaft hole of the high-speed reducer.

[0009] Furthermore, the high-speed reducer output shaft hole and the bottom of the high-speed reducer intermediate shaft hole are connected through a first connecting groove, and the high-speed reducer intermediate shaft hole and the bottom of the high-speed reducer input shaft hole are connected through a second connecting groove.

[0010] Furthermore, a first oil hole communicating with the top of the output shaft hole of the high-speed reducer is opened in the first oil channel.

[0011] Furthermore, the first branch end portion and the top of the high-speed reducer input shaft hole are communicated through a first oil groove.

[0012] Furthermore, the second branch end portion and the top of the intermediate shaft hole of the high-speed reducer are communicated through a second oil groove.

[0013] Furthermore, a third oil channel is provided at the bottom of the brake input shaft hole, and the third oil channel is connected to the low-speed reducer.

[0014] Furthermore, an oil level window is provided on the housing of the brake, and the first interface is also connected to an oil level sensor.

[0015] Compared with the existing technology, the technical solution of the present application has the following beneficial effects: the electric rotary system proposed in the present invention adopts an external oil pump for active lubrication, accurately lubricates the bearings and gear shafts, reduces oil churning losses, and makes the entire system more efficient; the oil can enter from the top of each shaft hole of the high-speed reducer, flow fully inside the high-speed reducer into the brake input shaft, and then circulate out, thereby accurately lubricating the bearings and gear shafts of the high-speed transmission part in the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 :Schematic diagram of the overall structure of the electric slewing system Figure 1 ; Figure 2 :Schematic diagram of the overall structure of the electric slewing system Figure 2 ; Figure 3 : Partial cross-sectional view of the electric rotary system along the axis of the first oil channel; Figure 4 :Section view of the electric rotary system along the Z axis Figure 1 ; Figure 5 :Section view of the electric rotary system along the Z axis Figure 2 ; Figure 6 :Section view of the electric rotary system along the Z axis Figure 3 . DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figures 1 to 3 An integrated high-speed electric rotary system includes a motor 1, a high-speed reducer 2, a brake 3, and a low-speed reducer 4, which are sequentially connected in a transmission manner. The motor 1 is electrically connected to a controller 5. The system also includes an oil pump 6, which is connected to the high-speed reducer housing 21 via an oil pipe 7. The ends of the oil pipe 7 are respectively a first interface 71 and a second interface 72. The first interface 71 is connected to the upper portion of the high-speed reducer housing 21, and the second interface 72 is connected to the lower portion of the high-speed reducer housing 21. The first interface 71 is connected to a first oil passage 73, which is connected to the top of each shaft hole in the high-speed reducer 2. The high-speed reducer 2 and the brake 3 are connected via a second oil passage 74. The bottom of the brake input shaft hole 31 is connected to the second interface 72.

[0019] The electric rotary system is actually installed vertically, that is, it is installed along the Z-axis. Therefore, traditional splash lubrication cannot meet the internal lubrication requirements of the system. In this system, the rotation speed between the various transmission shafts in the high-speed reducer 2 is relatively high, and sufficient lubrication is required. In the prior art, the lubricating oil flows and penetrates between the high-speed reducer 2 and the brake 3 through the gap between the gear shaft and the friction plate and the housing, and the lubrication efficiency is low. In this system, the oil is actively lubricated by the oil pump 6 and the oil pipe 7. The oil is connected to the first oil channel 73 through the first interface 71, and enters the top of each shaft hole from the upper part of the high-speed reducer housing 21. The oil flows fully through the shaft and housing gap in the high-speed reducer 2. After the oil reaches the output shaft of the high-speed reducer 2, it passes through the second oil channel 74 to the brake input shaft hole 31, and finally circulates through the second interface 72 through the oil pump 6. Therefore, the oil can fully lubricate the high-speed transmission part of the system through the internal oil channel.

[0020] In a more preferred embodiment, the first oil passage 73 is distributed vertically along the axis of the high-speed reducer input shaft hole 22, and the second oil passage 74 is distributed along the axis of the brake input shaft hole 31. Figure 4 The thick solid line represents the internal system flow of oil. Through first oil passage 73, the oil is distributed horizontally across the tops of the various shaft holes within high-speed reducer 2, passing through the transmission between the gears and the clearances between the reducer housing to the bottom, and then through second oil passage 74 to brake 3, thus achieving efficient lubrication of the entire high-speed transmission.

[0021] In a more preferred embodiment, the high-speed reducer 2 is a parallel shaft reducer, including a high-speed reducer intermediate shaft hole 23 and a high-speed reducer output shaft hole 24. The second oil passage 74 is a second oil hole 75 opened at the bottom of the high-speed reducer housing 21 and distributed circumferentially along the high-speed reducer output shaft hole 24. For details, see Figure 5 When the oil flows through the bottom of the high-speed reducer housing 21, it can enter the brake 3 through the second oil hole 75.

[0022] In a more preferred embodiment, the first oil passage 73 has a first branch 732 connected to the top of the high-speed reducer input shaft hole 22, and also has a second branch 733 connected to the high-speed reducer intermediate shaft hole 23. Figure 4 After the oil enters from the first interface 71, it enters the high-speed reducer input shaft hole 22 and the top of the high-speed reducer intermediate shaft hole 23 through the first branch 732 and the second branch 733 respectively, thereby fully lubricating its bearings and gear shafts.

[0023] In a more preferred embodiment, the high-speed reducer output shaft hole 24 and the bottom of the high-speed reducer intermediate shaft hole 23 are connected through a first connecting groove 76, and the high-speed reducer intermediate shaft hole 23 and the bottom of the high-speed reducer input shaft hole 22 are connected through a second connecting groove 77. Figure 5 When the oil reaches the bottom of the high-speed reducer 2, the oil between the high-speed reducer output shaft hole 24 and the high-speed reducer intermediate shaft hole 23 flows through the first connecting groove 76, and the oil between the high-speed reducer intermediate shaft hole 23 and the high-speed reducer input shaft hole 22 flows through the second connecting groove 77. At this point, the oil at both ends of each shaft hole in the high-speed reducer 2 can obtain sufficient flow lubrication.

[0024] In a more preferred embodiment, a first oil hole 734 is provided in the first oil passage 73 to communicate with the top of the high-speed reducer output shaft hole 24. Figure 3 The first oil channel 73 is distributed through the top of the high-speed reducer output shaft hole 24. In order to enable the oil to directly enter the high-speed reducer output shaft hole 24, several first oil holes 734 are opened in the first oil channel 73 along the vertical direction. The oil can directly enter the high-speed reducer output shaft hole 24 through the first oil holes 734.

[0025] In a more preferred embodiment, the end of the first branch 732 is connected to the top of the high-speed reducer input shaft hole 22 through the first oil groove 735. Figure 4 After the oil in the first branch 732 enters the top of the high-speed reducer input shaft hole 22, in order to enable the oil to flow to the high-speed reducer input shaft hole 22 more fully, the first oil groove 735 has an open design, which can increase the oil flow area, and preferably, multiple first oil grooves 735 can be opened. By utilizing the rapid operation and stirring of the shaft, the oil can be quickly transferred downward through multiple first oil grooves 735 to lubricate the gear shaft and bearings of the high-speed reducer input shaft.

[0026] In a more preferred embodiment, similar to the above embodiment, the end of the second branch 733 is connected to the top of the high-speed reducer intermediate shaft hole 23 through a second oil groove 736. The design of the second oil groove 736 further enables the oil to quickly lubricate the gear shaft and bearings of the high-speed reducer intermediate shaft.

[0027] In a more preferred embodiment, a third oil passage 79 is further provided at the bottom of the brake input shaft hole 31, and the third oil passage 79 is connected to the low-speed reducer 4. In this embodiment, please refer to Figure 6Third oil passage 79 comprises a rectangular oil hole 791 and an arcuate diffuser oil passage 792, which are interconnected. Rectangular oil hole 791 connects vertically to low-speed reducer 4. Arcuate diffuser oil passage 792 converges from brake input shaft hole 31 toward rectangular oil hole 791, increasing the oil flow rate into rectangular oil hole 791. The oil between brake 3 and low-speed reducer 4 no longer relies solely on the splined connection between the shaft teeth for penetration. Instead, it can flow through third oil passage 79, improving lubrication within low-speed reducer 4.

[0028] In a more preferred embodiment, an oil level window 32 is further provided on the housing of the brake 3. Through the oil level window 32, it can be observed whether the oil flows normally into the housing of the brake 3.

[0029] In a more preferred embodiment, the first interface 71 is further connected to an oil level sensor 78 .

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An integrated high-speed electric rotary system, comprising a motor (1), a high-speed reducer (2), a brake (3) and a low-speed reducer (4) connected in sequence, wherein the motor (1) and a controller (5) are electrically connected, and is characterized in that: The invention also includes an oil pump (6), which is connected to the high-speed reducer housing (21) through an oil pipe (7), and the two ends of the oil pipe (7) are respectively a first interface (71) and a second interface (72), the first interface (71) is connected to the upper part of the high-speed reducer housing (21), and the second interface (72) is connected to the lower part of the high-speed reducer housing (21); the first interface (71) is connected to the first oil channel (73), and the first oil channel (73) is connected to the top of each shaft hole in the high-speed reducer (2). The high-speed reducer (2) and the brake (3) are connected through the second oil channel (74), and the bottom of the brake input shaft hole (31) is connected to the second interface (72).

2. The integrated high-speed electric slewing system according to claim 1, characterized in that: The first oil passage (73) is distributed vertically along the axis of the high-speed reducer input shaft hole (22), and the second oil passage (74) is distributed along the axis of the brake input shaft hole (31).

3. The integrated high-speed electric slewing system according to claim 2, characterized in that: The high-speed reducer (2) is a parallel-axis reducer, comprising a high-speed reducer intermediate shaft hole (23) and a high-speed reducer output shaft hole (24); the second oil passage (74) is a second oil hole (75) opened at the bottom of the high-speed reducer housing (21) and distributed along the circumference of the high-speed reducer output shaft hole (24).

4. The integrated high-speed electric slewing system according to claim 3, characterized in that: The first oil passage (73) has a first branch (732) connected to the top of the high-speed reducer input shaft hole (22), and also has a second branch (733) connected to the high-speed reducer intermediate shaft hole (23).

5. The integrated high-speed electric slewing system according to claim 3, characterized in that: The high-speed reducer output shaft hole (24) and the bottom of the high-speed reducer intermediate shaft hole (23) are connected through a first connecting groove (76), and the high-speed reducer intermediate shaft hole (23) and the bottom of the high-speed reducer input shaft hole (22) are connected through a second connecting groove (77).

6. The integrated high-speed electric slewing system according to claim 4, characterized in that: A first oil hole (734) communicating with the top of the high-speed reducer output shaft hole (24) is provided in the first oil passage (73).

7. The integrated high-speed electric slewing system according to claim 6, characterized in that: The end of the first branch (732) and the top of the high-speed reducer input shaft hole (22) are connected via a first oil groove (735).

8. The integrated high-speed electric slewing system according to claim 7, characterized in that: The end of the second branch (733) and the top of the high-speed reducer intermediate shaft hole (23) are connected through the second oil groove (736).

9. The integrated high-speed electric rotary system according to claim 2, characterized in that: A third oil passage (79) is also provided at the bottom of the brake input shaft hole (31), and the third oil passage (79) is connected to the low-speed reducer (4).

10. The integrated high-speed electric slewing system according to any one of claims 1 to 9, characterized in that: An oil level window (32) is also provided on the housing of the brake (3), and the first interface (71) is also connected to an oil level sensor (78).

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