Rotary electric drive assembly
By adopting a parallel shaft reduction structure and an active lubrication module in the rotary electric drive assembly, the problems of high torque output and structural complexity in large-tonnage rotary machinery have been solved, achieving efficient lubrication and improved stability, and extending service life.
Patent Information
- Application Number
- CN202520496637.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-03-20
AI Technical Summary
In existing technologies, electric drive systems for large-tonnage rotary machinery are difficult to achieve high torque output, have complex structures, are difficult to maintain, and are costly.
The high-speed reducer adopts a parallel shaft reduction structure, and multiple parallel shafts are set as non-parallel eccentric distribution to form an interconnected common cavity structure. Lubrication is performed through an active lubrication module, which simplifies the structure and improves stability.
It achieves high torque output, reduces structural complexity, improves shock resistance and lubrication efficiency, and extends service life.
Smart Images
Figure CN223609272U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a rotary electric drive assembly and belongs to the rotary engineering machinery field. BACKGROUND
[0002] With the gradual perfection of the application of the electric drive system in the small-tonnage rotary engineering machinery field, the large-tonnage rotary engineering machinery also gradually starts the research of the electric drive system, and the output of large torque and the installation space are the problems faced by the electric drive of the large-tonnage rotary engineering machinery.
[0003] There are mainly two forms of the electric drive rotary system in the market at present. The first form is a motor direct drive rotary system, and the scheme has little cost disadvantage in the small-tonnage rotary engineering machinery, but in the large-tonnage scheme, the cost of the large torque motor is high, and the cost of the power supply and the controller and other parts is also high, so the overall price is much higher than that of the traditional fuel scheme, and the energy efficiency advantage is difficult to show in the later use. The second form is a motor plus high-speed planetary gear reducer, brake and rotary reducer, and the scheme adopts the planetary gear reducer to reduce the motor speed and increase the torque, so that a low-cost, small-size high-speed, low-torque motor can be used, but a planetary reducer with a large reduction ratio is needed, and the planetary gear reducer mechanism is complex, which is more prone to problems in the assembly process or later maintenance, causing the electric drive system to be scrapped. SUMMARY
[0004] The rotary electric drive assembly provided by the utility model adopts the parallel shaft type reduction structure for the high-speed reducer, and sets the plurality of parallel shafts in the parallel shaft type reduction structure as eccentric distribution instead of side by side, improves the anti-shock performance, reduces the structure and improves the running stability under the premise of ensuring the large torque output, improves the lubrication efficiency, facilitates the disassembly and maintenance of the active lubrication module, facilitates the later maintenance and optimization, and prolongs the service life of the rotary electric drive assembly.
[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:
[0006] The rotary electric drive assembly comprises a motor, a high-speed reducer, a hydraulic brake and a rotary reducer connected from top to bottom, characterized in that: the high-speed reducer, the hydraulic brake and the rotary reducer are set in a communicating type common cavity from top to bottom, and form active lubrication from top to bottom through the active lubrication module installed on the outer periphery of the high-speed reducer, the high-speed reducer is a parallel shaft type reduction structure, and the plurality of parallel shafts are eccentric distribution instead of side by side.
[0007] Preferably, the high-speed reducer comprises an input shaft connected with the motor, an intermediate shaft engaged with the input shaft and an output shaft engaged with the intermediate shaft, and the input shaft, the intermediate shaft and the output shaft are eccentric distribution instead of side by side.
[0008] Preferably, both the upper and lower ends of the input shaft are equipped with thrust ball bearings for axial load bearing.
[0009] Preferably, the active lubrication module includes an electronic oil pump fixed on the housing of the high-speed reducer, an oil inlet pipe that is connected to the oil inlet of the electronic oil pump through a filter and extends into the inner cavity of the hydraulic brake, and an oil outlet pipe that is connected to the oil outlet of the electronic oil pump and extends into the top of the inner cavity of the high-speed reducer.
[0010] Preferably, the active lubrication module further includes an oil guide pipe connecting the inner cavity of the high-speed reducer and the inner cavity of the rotary reducer. The upper end of the oil guide pipe is connected to the bottom of the inner cavity of the high-speed reducer, and the lower end is connected to the top of the inner cavity of the rotary reducer.
[0011] The beneficial effects of this utility model are:
[0012] This utility model discloses a rotary electric drive assembly. The motor output power is reduced in speed and increased in torque by a high-speed reducer, and then further reduced in speed and increased in torque by a rotary reducer module to form a large torque power output. It is suitable for large-tonnage rotary engineering machinery. The high-speed reducer adopts a parallel shaft reduction structure, which can form a large speed ratio for speed reduction and torque increase. Compared with planetary reducers, it has a simpler structure and better axial load capacity when transmitting large torque. By setting the multiple parallel shafts in the parallel shaft reduction structure to a non-parallel eccentric distribution, the radial dimension of the parallel shaft reduction structure can be effectively reduced, shortening the radial eccentricity between the high-speed reducer, hydraulic brake, and motor caused by the parallel shaft setting. This reduces the bending moment generated by the rotary electric drive assembly during high-speed operation and improves the vibration resistance. The structure is simplified and the operational stability is improved while ensuring large torque output. The high-speed reducer, hydraulic brake, and rotary reducer form a common cavity connected vertically and are actively lubricated by an external active lubrication module, which improves lubrication efficiency and facilitates the disassembly and maintenance of the active lubrication module, making it convenient for later maintenance and optimization, thereby extending the service life of the rotary electric drive assembly. Attached Figure Description
[0013] Fig. 1 This is a schematic diagram of the rotary electric drive assembly in a specific implementation.
[0014] Fig. 2 This is a cross-sectional view of the rotary electric drive assembly.
[0015] Fig. 3 This is a schematic diagram showing the connection between the input shaft, intermediate shaft, and output shaft in a high-speed reducer. Detailed Implementation
[0016] The following is combined with Figs. 1-3 The embodiments of this utility model will be described in detail below.
[0017] The rotary electric drive assembly comprises a motor 1, a high-speed reducer 2, a hydraulic brake 3 and a rotary reducer 4 connected from top to bottom, characterized in that the high-speed reducer 2, the hydraulic brake 3 and the rotary reducer 4 are arranged in a common cavity in communication from top to bottom, and are actively lubricated from top to bottom through a driving lubrication module 5 installed on the outer periphery of the high-speed reducer 2.
[0018] The rotary electric drive assembly described above, the output power of the motor 1 is reduced and the torque is increased through the high-speed reducer 2, and then reduced and the torque is increased through the rotary reducer 4, forming a large-torque power output, which is suitable for large-tonnage rotary engineering machinery. The high-speed reducer 2 adopts a parallel shaft type reduction structure, which can form a large speed ratio reduction and torque increase, and is simpler than the planetary reducer structure, and has better axial load capacity when transmitting large torque. The plurality of parallel shafts in the parallel shaft type reduction structure are arranged in a non-side-by-side eccentric distribution, which can effectively reduce the radial size of the parallel shaft type reduction structure, shorten the radial eccentricity between the high-speed reducer 2 and the hydraulic brake 3 and the motor 1 caused by the arrangement of the parallel shafts, reduce the bending moment generated by the rotary electric drive assembly during high-speed operation, and improve the anti-shock performance. On the premise of ensuring large-torque output, the structure is simplified and the operation stability is improved; the high-speed reducer 2, the hydraulic brake 3 and the rotary reducer 4 are arranged in a common cavity in communication from top to bottom and are actively lubricated through the external driving lubrication module 5, which improves the lubrication efficiency and facilitates the disassembly and maintenance of the driving lubrication module, facilitating later maintenance and optimization to prolong the service life of the rotary electric drive assembly.
[0019] The high-speed reducer 2 comprises an input shaft 21 connected with the motor 1, an intermediate shaft 22 engaged with the input shaft 21, and an output shaft 23 engaged with the intermediate shaft 22, and the input shaft 21, the intermediate shaft 22 and the output shaft 23 are arranged in a non-side-by-side eccentric distribution. The input shaft 21 is connected with the output end of the motor, and the output shaft 23 is connected with the transmission shaft of the hydraulic brake 3. In order to reduce the distance between the input shaft 21 and the output shaft 22, the input shaft 21, the intermediate shaft 22 and the output shaft 23 are arranged in a non-side-by-side eccentric distribution, from Fig. 2 As shown in the figure, the input shaft 21 and the output shaft 23 are arranged on both sides of the intermediate shaft 22 without being side by side, and the arrangement of the input shaft 21, the intermediate shaft 22 and the output shaft 23 is more compact, which can effectively reduce the radial size of the high-speed reducer 2, reduce the radial span of the rotary drive assembly, shorten the radial eccentricity between the high-speed reducer 2 and the hydraulic brake 3 and the motor 1 caused by the arrangement of the parallel shafts, reduce the bending moment generated by the rotary electric drive assembly during high-speed operation, and improve the anti-shock performance.
[0020] The input shaft 21 is equipped with a thrust ball bearing 24 at both ends for axial bearing. Fig. 3As shown, the upper end of the input shaft 21 is equipped with a thrust ball bearing 24 through a shaft shoulder, and the lower end is equipped with a cylindrical bearing and a thrust ball bearing 24 through a shaft shoulder, in order to meet the torque requirements of large-tonnage rotary engineering machinery, the motor 1 will adopt a high-speed high-torque motor, the input shaft is under high axial load, in order to improve the axial load capacity of the input shaft 21, a thrust ball bearing 24 is equipped at both ends of the input shaft 21 to ensure the load reliability of the input shaft 21, thereby improving the transmission reliability of the high-speed reducer 2.
[0021] The active lubrication module 5 comprises an electronic oil pump 51 fixed on the housing of the high-speed reducer 2, an oil inlet pipe 52 connected to the oil inlet of the electronic oil pump 51 and extending into the inner cavity of the hydraulic brake 3, and an oil outlet pipe 53 connected to the oil outlet of the electronic oil pump 51 and extending into the top of the inner cavity of the high-speed reducer 2. Since the hydraulic brake 3 is assembled at the bottom of the high-speed reducer 2, the disc-shaped structure of the hydraulic brake 3 will cause the accumulation of lubricating oil. The oil accumulated at the bottom of the high-speed reducer 2 is pumped to the top of the inner cavity of the high-speed reducer 2 by the electronic oil pump 51, so that the oil flows from top to bottom, forming active lubrication. The active lubrication module 5 is externally mounted, which is convenient for replacement and maintenance and facilitates later maintenance and optimization.
[0022] The active lubrication module 5 further comprises an oil guide pipe 54 connecting the inner cavity of the high-speed reducer 2 and the inner cavity of the rotary reducer 4, the upper end of the oil guide pipe 54 is connected to the bottom of the inner cavity of the high-speed reducer 2, and the lower end is connected to the top of the inner cavity of the rotary reducer 4. The high-speed reducer 2, the hydraulic brake 3 and the rotary reducer 4 are connected in a common cavity from top to bottom. The oil pumped to the top of the inner cavity of the high-speed reducer 2 by the electronic oil pump 52 can lubricate the high-speed reducer 2, the hydraulic brake 3 and the rotary reducer 4 from top to bottom. However, the hydraulic brake 3 will hinder the downward flow of lubricating oil, reducing the flow rate and flow velocity of the lubricating oil flowing downward to the rotary reducer 4. In order to ensure the lubrication reliability of the rotary reducer 4, an oil guide pipe 54 is connected between the high-speed reducer 2 and the rotary reducer 4, the upper end of the oil guide pipe 54 is connected to the bottom of the inner cavity of the high-speed reducer 2, and the lower end is connected to the top of the inner cavity of the rotary reducer 4. The oil at the bottom of the inner cavity of the high-speed reducer 2 is directly guided to the top of the inner cavity of the rotary reducer 4, improving the efficiency of active lubrication and ensuring the reliability of lubrication.
[0023] The technical solutions of the embodiments of the present application are described in detail above in combination with the drawings. It should be noted that the described embodiments are only a part of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
Claims
1. A slewing electric drive assembly comprising, from top to bottom, an electric motor, a high speed reduction gear, a hydraulic brake and a slewing reduction gear, characterized in that: The high-speed reducer, the hydraulic brake and the rotary reducer are arranged in a top-down communication type in a common cavity, and are formed with a top-down active lubrication through a driving lubrication module mounted on the outer periphery of the high-speed reducer.
2. The slewing electric drive assembly of claim 1, wherein: The high-speed reducer comprises an input shaft connected with the motor, an intermediate shaft engaged with the input shaft and an output shaft engaged with the intermediate shaft, and the input shaft, the intermediate shaft and the output shaft are arranged in a non-side-by-side eccentric distribution.
3. The slewing electric drive assembly of claim 2, wherein: The input shaft is axially supported by a thrust ball bearing mounted on the upper and lower ends of the input shaft.
4. The slewing electric drive assembly of claim 1, wherein: The driving lubrication module comprises an electronic oil pump fixed on the shell of the high-speed reducer, an oil inlet pipe in abutment with the oil inlet of the electronic oil pump and extending into the inner cavity of the hydraulic brake, and an oil outlet pipe in abutment with the oil outlet of the electronic oil pump and extending into the top of the inner cavity of the high-speed reducer.
5. The slewing electric drive assembly of claim 4, wherein: The driving lubrication module further comprises an oil guide pipe in communication with the inner cavities of the high-speed reducer and the rotary reducer, the upper end of the oil guide pipe being in communication with the bottom of the inner cavity of the high-speed reducer, and the lower end of the oil guide pipe being in communication with the top of the inner cavity of the rotary reducer.