CN216306680U - Cooling and lubricating structure of reduction gearbox of pure electric oil-cooled motor - Google Patents
Cooling and lubricating structure of reduction gearbox of pure electric oil-cooled motor Download PDFInfo
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- CN216306680U CN216306680U CN202121963880.4U CN202121963880U CN216306680U CN 216306680 U CN216306680 U CN 216306680U CN 202121963880 U CN202121963880 U CN 202121963880U CN 216306680 U CN216306680 U CN 216306680U
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Abstract
The utility model discloses a cooling and lubricating structure of a pure electric oil-cooled motor reduction box, wherein a left bearing and a right bearing are respectively arranged on the reduction box, a lubricating oil path comprises an oil duct, an oil inlet duct arranged in the box and an oil duct arranged in the box, one end of the oil duct is matched with the reduction box, the other end of the oil duct is matched with an oil pump, the output end of the oil pump is connected with the oil inlet duct arranged in the box, the cooling and lubricating structure also comprises a heat exchanger and an oil guide pipe, the heat exchanger is positioned outside the reduction box, the heat exchanger is provided with an oil inlet and an oil outlet, the oil inlet is connected with the oil inlet duct arranged in the box, the oil outlet is connected with the oil duct arranged in the box, the input shaft is a hollow shaft, the oil guide pipe and at least one part of a motor shaft are matched in the input shaft, and the oil duct arranged in the box is matched with the oil guide pipe. The utility model can not only realize cooling and lubricating of the internal parts of the speed reducer, but also effectively and actively cool and lubricate important parts such as a motor stator, a motor shaft and the like.
Description
Technical Field
The utility model relates to a cooling and lubricating structure of a pure electric oil-cooled motor reduction box.
Background
Along with pure electric vehicles's continuous development, the rotational speed of reduction gear input is higher and higher, and the cooling method of motor is also inclined to oil-cooled motor by water-cooled motor gradually, and this has undoubtedly proposed higher requirement to the cooling and lubrication of reduction gear and motor part, and traditional reduction gear cooling and lubrication method adopts splash lubrication more. Because the design of a lubricating system in the existing speed reducer is not reasonable enough, the lubricating oil is poor in cooling effect and is recycled, so that the speed reducer is poor in lubrication and the service life of the speed reducer is shortened. On the other hand, the existing speed reducer is not ideal in cooling effect due to the fact that the temperature of lubricating oil is high, and needs to be further improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cooling and lubricating structure of a pure electric oil-cooled motor reduction box, which can not only realize cooling and lubricating of internal parts of the reduction box, but also effectively and actively cool and lubricate important parts such as a motor stator, a motor shaft and the like.
The technical scheme for realizing the purpose is as follows:
the pure electric oil cooling motor reduction box cooling and lubricating structure comprises a reduction box, a shaft system, an oil pump, a lubricating oil path and a motor shaft, wherein the shaft system comprises an input shaft, a left bearing and a right bearing, one end of the input shaft is connected with the left bearing, the other end of the input shaft is connected with the right bearing, the left bearing and the right bearing are respectively arranged on the reduction box, the lubricating oil path comprises an oil path, a box body built-in oil inlet oil path and a box body built-in oil path, one end of the oil path is matched with the reduction box, the other end of the oil path is matched with the oil pump, the output end of the oil pump is connected with the box body built-in oil inlet oil path, the pure electric oil cooling motor reduction box cooling and lubricating structure also comprises a heat exchanger and an oil guide pipe, the heat exchanger is positioned outside the reduction box, the heat exchanger is provided with an oil inlet and an oil outlet, the oil inlet is connected with the box body built-in oil inlet, the input shaft is a hollow shaft, at least one part of the oil guide pipe and the motor shaft are matched in the input shaft, the built-in oil duct of the box body is matched with the oil guide pipe.
The utility model has the following advantages:
1. the structure is simple and convenient to realize;
2. the passive cooling lubrication and the active cooling lubrication are combined, and the bearing is efficiently cooled and lubricated;
3. an active lubricating device is added, so that the motor stator and the motor shaft can be effectively cooled and lubricated;
4. the throttling design is added, and the flow of active lubrication can be controlled according to requirements;
5. a filtering device is added, so that the cleanliness of oil products can be ensured;
6. the lubricating oil path is arranged in the box body, so that the number of oil guide pipelines arranged outside the box body is reduced, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic diagram of an active lubrication oil absorption structure;
FIG. 2 is a schematic illustration of active lubrication;
FIG. 3 is a schematic view of active lubrication of a bearing;
FIG. 4 is a schematic view of the left tank lubrication configuration;
fig. 5 is a schematic view of a right tank lubrication structure.
Detailed Description
The present invention will be described with reference to fig. 1 to 5.
The cooling and lubricating structure of the pure electric oil-cooled motor reduction gearbox comprises a reduction gearbox 1, a shaft system 2, an oil pump 3, a lubricating oil path 6 and a motor shaft 8, wherein the shaft system 2 comprises an input shaft 2-1, a left bearing 2-2 and a right bearing 2-3, one end of the input shaft 2-1 is connected with the left bearing 2-2, the other end of the input shaft 2-1 is connected with the right bearing 2-3, the left bearing 2-2 and the right bearing 2-3 are respectively arranged on the reduction gearbox 1, the lubricating oil path 6 comprises an oil path 6-1, an oil inlet oil path 6-2 arranged in the gearbox and an oil path 6-3 arranged in the gearbox, one end of the oil path 6-1 is matched with the reduction gearbox 1, the other end of the oil path 6-1 is matched with the oil pump 3, the output end of the oil pump 3 is connected with the oil inlet oil path 6-2 arranged in the gearbox, and a heat exchanger 5, The gearbox comprises an oil guide pipe 7, a heat exchanger 5 is located outside the gearbox 1, the heat exchanger 5 is provided with an oil inlet 5-3 and an oil outlet 5-4, the oil inlet 5-3 is connected with an internal oil inlet duct 6-2 of the gearbox, the oil outlet 5-4 is connected with the internal oil duct 6-3 of the gearbox, the input shaft 2-1 is a hollow shaft, at least a part of the oil guide pipe 7 and at least a part of the motor shaft 8 are matched in the input shaft 2-1, and the internal oil duct 6-3 of the gearbox is matched with the oil guide pipe 7. The heat exchanger 5 is provided with a water inlet (5-1) and a water outlet 5-2, the heat exchanger 5 is provided with a heat exchange channel, one end of the heat exchange channel is matched with the water inlet 5-1, and the other end of the heat exchange channel is matched with the water outlet 5-2.
When the oil pump 3 is started, lubricating oil is sucked from the reduction gearbox 1 through the oil duct 6-1 due to the suction force of the oil pump 3, in order to ensure the cleanliness of the lubricating oil, a filter 4 is arranged to filter the oil before the oil enters the oil pump 3, and after the lubricating oil enters the oil pump, the lubricating oil is input into the built-in oil inlet duct 6-2 of the box body from the oil pump 3 and enters the oil inlet 5-3 of the heat exchanger 5 through the built-in oil inlet duct 6-2 of the box body. The cooling liquid enters the heat exchange channel through the water inlet 5-1 of the heat exchanger 5, the heat of the lubricating oil in the heat exchanger 5 is transferred to the cooling liquid through the heat transfer function of the heat exchanger 5, and the heat is taken away by the cooling liquid, so that the temperature of the lubricating oil is reduced. And a part of the cooled lubricating oil enters the built-in oil channel 6-3 of the box body from the oil outlet 5-4, and after passing through the oil guide pipe 7, a part of the lubricating oil enters the motor shaft hole 8-1 to cool and lubricate the motor shaft 8, and finally flows into the motor shell after passing through the motor shaft 8 to cool and lubricate the motor stator. Part of the lubricating oil enters the hole of the input shaft 2-1 due to the small clearance fit between the oil guide pipe 7 and the motor shaft hole 8-1, so as to cool and lubricate the motor shaft spline and also enter the input shaft 2-1 for cooling and lubrication. And the other part of the cooled lubricating oil enters the reduction gearbox 1.
The reduction gearbox 1 comprises a left box body 1-1 and a right box body 1-2, an input shaft left bearing hole 1-1-5 is formed in the left box body 1-1, the left bearing 2-2 is installed in the input shaft left bearing hole 1-1-5, a first oil guide groove 1-1-3 is formed in the periphery of the input shaft left bearing hole 1-1-5, a second oil blocking partition plate 1-1-6 is arranged on the wall of the left box body 1-1, and the second oil blocking partition plate 1-1-6 is matched with the first oil guide groove 1-1-3 to guide splashed lubricating oil into the input shaft left bearing hole 1-1-5. The wall of the left box body 1-1 is provided with a first middle shaft bearing hole 1-1-7, and the wall of the left box body 1-1 is provided with a first middle oil guide groove 1-1-4 which is communicated with the first middle shaft bearing hole 1-1-7 and the input shaft left bearing hole 1-1-5.
After the lubricating oil output from the built-in oil passage 6-3 of the box body enters the inner hole of the input shaft 2-1, when the lubricating oil enters the oil guide pipe 7, the oil guide pipe 7 and the left bearing hole 1-1-5 of the input shaft are in clearance fit, the lubricating oil can flow into the left bearing hole 1-1-5 of the input shaft and the bearing hole 1-1-7 of the first intermediate shaft from the clearance between the oil guide pipe 7 and the left bearing hole of the input shaft, and the left bearing 2-2 is cooled and lubricated.
The box wall of the left box body 1-1 is further provided with a first oil baffle plate 1-1-1 and a differential left mounting hole 1-1-8, a first differential oil groove 1-1-2 is arranged around the differential left mounting hole 1-1-8, and the first oil baffle plate 1-1-1 is matched with the first differential oil groove 1-1-2 to guide splashed lubricating oil into the differential left mounting hole 1-1-8.
The shaft system 2 drives lubricating oil to splash in the rotating process, the first oil baffle plate 1-1-1 on the left box body 1-1 is used for blocking the splashed lubricating oil, and the lubricating oil flows into the left mounting hole 1-1-8 of the differential along the first differential oil groove 1-1-2 to cool and lubricate a left bearing of the differential. Meanwhile, a part of splashed lubricating oil is blocked by the second oil blocking partition plate 1-1-6, flows into the left bearing hole 1-1-5 of the input shaft along the first oil guide groove 1-1-3 and then flows into the first middle shaft bearing hole 1-1-7 through the first middle oil guide groove 1-1-4 to lubricate the left bearing and the middle left bearing. The first differential oil groove 1-1-2 and the first oil guide groove 1-1-3 respectively form included angles with the horizontal direction of the differential left mounting hole 1-1-8 and the input shaft left bearing hole 1-1-5, so that lubricating oil can better flow into the corresponding holes.
The inner wall of the right box body 1-2 is provided with an input shaft right bearing hole 1-2-6 and a baffle plate 1-2-4 for forcing lubricating oil to flow to the area where the shaft right bearing hole 1-2-6 is located, the right bearing 2-3 is installed in the input shaft right bearing hole 1-2-6, the inner wall surface of the right box body 1-2 is provided with a second oil guide groove 1-2-1 communicated with the input shaft right bearing hole 1-2-6, and the second oil guide groove 1-2-1 guides splashed lubricating oil into the input shaft right bearing hole 1-2-6.
The box wall of the right box body 1-2 is also provided with a differential right mounting hole 1-2-7 and a second differential oil groove 1-2-3 communicated with the differential right mounting hole 1-2-7, and the second differential oil groove 1-2-3 guides splashed lubricating oil into the differential right mounting hole 1-2-7. The wall of the right box body 1-2 is provided with a second middle shaft bearing hole 1-2-8, and the wall of the right box body 1-2 is provided with a second middle oil guide groove 1-2-2 communicated with the second middle shaft bearing hole 1-2-6 and the input shaft right bearing hole 1-2-6.
The shaft system 2 drives lubricating oil to splash in the rotating process, the splashed oil is blocked by the baffle plates 1-2-4 and the inner wall of the right box body 1-2, and the lubricating oil is forced to flow to the area where the right bearing hole 1-2-6 of the shaft is located, so that the lubricating oil flows into the second differential oil groove 1-2-3 along the wall of the box body, and the right bearing of the differential positioned in the right mounting hole 1-2-7 of the differential is cooled and lubricated.
Lubricating oil flows into the second oil guide groove 1-2-1 along the wall of the box body, then flows into the right bearing hole 1-2-6 of the input shaft from the second oil guide groove 1-2-1, lubricates a right bearing 2-3 positioned in the right bearing hole 1-2-6 of the input shaft, and enters the second middle shaft bearing hole 1-2-8 from the right bearing hole 1-2-6 of the input shaft through the second middle oil guide groove 1-2-2 to lubricate a bearing positioned in the second middle shaft bearing hole 1-2-8.
An included angle is formed between the second differential oil groove 1-2-3 and the right differential mounting hole 1-2-7 in the horizontal direction, so that lubricating oil can better flow into the right differential mounting hole 1-2-7 to lubricate a right differential bearing. The second oil guide groove 1-2-1 and the second middle oil guide groove 1-2-2 form included angles with the horizontal direction of the input shaft 2-1 and the second middle shaft bearing hole 1-2-8, so that lubricating oil can better flow into the right bearing hole 1-2-6 of the input shaft and the second middle shaft bearing hole 1-2-8.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and the patent scope of the present invention is not limited; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; in addition, the technical scheme of the utility model is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the utility model.
Claims (6)
1. A cooling and lubricating structure of a pure electric oil-cooled motor reduction gearbox comprises a reduction gearbox (1), a shaft system (2), an oil pump (3), a lubricating oil path (6) and a motor shaft (8), wherein the shaft system (2) comprises an input shaft (2-1), a left bearing (2-2) and a right bearing (2-3), one end of the input shaft (2-1) is connected with the left bearing (2-2), the other end of the input shaft (2-1) is connected with the right bearing (2-3), the left bearing (2-2) and the right bearing (2-3) are respectively installed on the reduction gearbox (1), the lubricating oil path (6) comprises an oil path (6-1), an oil inlet oil duct (6-2) and an oil duct (6-3) which are arranged in a box body, one end of the oil duct (6-1) is matched with the reduction gearbox (1), and the other end of the oil duct (6-1) is matched with the oil pump (3), the output end of the oil pump (3) is connected with an oil inlet oil duct (6-2) arranged in the box body, the oil pump is characterized by further comprising a heat exchanger (5) and an oil guide pipe (7), the heat exchanger (5) is located outside the reduction gearbox (1), the heat exchanger (5) is provided with an oil inlet (5-3) and an oil outlet (5-4), the oil inlet (5-3) is connected with the oil inlet oil duct (6-2) arranged in the box body, the oil outlet (5-4) is connected with the oil duct (6-3) arranged in the box body, the input shaft (2-1) is a hollow shaft, at least one part of the oil guide pipe (7) and the motor shaft (8) is matched in the input shaft (2-1), and the oil duct (6-3) arranged in the box body is matched with the oil guide pipe (7).
2. The cooling and lubricating structure of the pure electric oil-cooled motor reduction gearbox according to claim 1, characterized in that a water inlet (5-1) and a water outlet (5-2) are arranged on the heat exchanger (5), a heat exchange channel is arranged on the heat exchanger (5), one end of the heat exchange channel is matched with the water inlet (5-1), and the other end of the heat exchange channel is matched with the water outlet (5-2).
3. A pure electric oil-cooled motor reduction gearbox cooling and lubricating structure as defined in claim 1, characterized in that the reduction gearbox (1) comprises a left box body (1-1) and a right box body (1-2), the left box body (1-1) is provided with an input shaft left bearing hole (1-1-5), the left bearing (2-2) is installed in an input shaft left bearing hole (1-1-5), a first oil guide groove (1-1-3) is formed in the periphery of the input shaft left bearing hole (1-1-5), a second oil blocking partition plate (1-1-6) is arranged on the box wall of the left box body (1-1), and the second oil blocking partition plate (1-1-6) is matched with the first oil guide groove (1-1-3) to guide splashed lubricating oil into the input shaft left bearing hole (1-1-5);
the inner wall of the right box body (1-2) is provided with an input shaft right bearing hole (1-2-6) and a baffle (1-2-4) for forcing lubricating oil to flow to the area where the shaft right bearing hole (1-2-6) is located, the right bearing (2-3) is installed in the input shaft right bearing hole (1-2-6), the inner wall surface of the right box body (1-2) is provided with a second oil guide groove (1-2-1) communicated with the input shaft right bearing hole (1-2-6), and the second oil guide groove (1-2-1) guides splashed lubricating oil into the input shaft right bearing hole (1-2-6).
4. A cooling and lubricating structure of a pure electric oil-cooled motor reduction gearbox according to claim 3, characterized in that the box wall of the left box body (1-1) is further provided with a first oil baffle plate (1-1-1) and a differential left mounting hole (1-1-8), a first differential oil groove (1-1-2) is arranged around the differential left mounting hole (1-1-8), and the first oil baffle plate (1-1-1) is matched with the first differential oil groove (1-1-2) to guide splashed lubricating oil into the differential left mounting hole (1-1-8).
5. A pure electric oil-cooled motor reduction gearbox cooling and lubricating structure as defined in claim 3, wherein the box wall of the right box body (1-2) is further provided with a differential right mounting hole (1-2-7) and a second differential oil groove (1-2-3) communicated with the differential right mounting hole (1-2-7), and the second differential oil groove (1-2-3) guides splashed lubricating oil into the differential right mounting hole (1-2-7).
6. A pure electric oil-cooled motor reduction gearbox cooling and lubricating structure as defined in claim 3, characterized in that the wall of the left box body (1-1) is provided with a first intermediate shaft bearing hole (1-1-7), and the wall of the left box body (1-1) is provided with a first intermediate oil guide groove (1-1-4) communicating the first intermediate shaft bearing hole (1-1-7) and the input shaft left bearing hole (1-1-5);
a second middle shaft bearing hole (1-2-8) is arranged on the box wall of the right box body (1-2), and a second middle oil guide groove (1-2-2) which is communicated with the second middle shaft bearing hole (1-2-8) and the input shaft right bearing hole (1-2-6) is arranged on the box wall of the right box body (1-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121963880.4U CN216306680U (en) | 2021-08-20 | 2021-08-20 | Cooling and lubricating structure of reduction gearbox of pure electric oil-cooled motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121963880.4U CN216306680U (en) | 2021-08-20 | 2021-08-20 | Cooling and lubricating structure of reduction gearbox of pure electric oil-cooled motor |
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| Publication Number | Publication Date |
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| CN216306680U true CN216306680U (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121963880.4U Active CN216306680U (en) | 2021-08-20 | 2021-08-20 | Cooling and lubricating structure of reduction gearbox of pure electric oil-cooled motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419153A (en) * | 2023-12-18 | 2024-01-19 | 中国第一汽车股份有限公司 | In-shaft oil guide pipe, transmission case motor branch lubricating structure and vehicle |
-
2021
- 2021-08-20 CN CN202121963880.4U patent/CN216306680U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419153A (en) * | 2023-12-18 | 2024-01-19 | 中国第一汽车股份有限公司 | In-shaft oil guide pipe, transmission case motor branch lubricating structure and vehicle |
| CN117419153B (en) * | 2023-12-18 | 2024-03-15 | 中国第一汽车股份有限公司 | In-shaft oil guide pipe, transmission case motor branch lubricating structure and vehicle |
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