CN212056677U - Lubricating structure of power motor bearing for new energy automobile - Google Patents
Lubricating structure of power motor bearing for new energy automobile Download PDFInfo
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- CN212056677U CN212056677U CN201921432812.8U CN201921432812U CN212056677U CN 212056677 U CN212056677 U CN 212056677U CN 201921432812 U CN201921432812 U CN 201921432812U CN 212056677 U CN212056677 U CN 212056677U
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Abstract
The utility model provides a lubricating structure of a power motor bearing for a new energy automobile, which can effectively take away huge heat generated by friction through the circulation of lubricating oil; meanwhile, the lubricating oil can keep effective lubrication on the bearing and the oil seal, so that the service life of the bearing is ensured. The motor shaft penetrates through a center hole of the motor end cover, the part of the motor end cover corresponding to the center hole is thickened, an inner side oil seal is arranged on the inner side inner ring of the motor end cover corresponding to the center hole, a sealing cover plate covers the outer side end face of the motor end cover corresponding to the center hole, an outer side oil seal is arranged on the area of the sealing cover plate corresponding to the motor shaft, the inner ring of the outer side oil seal is sleeved on the corresponding outer ring wall of the motor shaft, a spacing distance is arranged in the space of the inner side oil seal and the outer side oil seal corresponding to the center hole, the motor shaft penetrates through the inner side oil seal and the outer side oil seal, and.
Description
Technical Field
The utility model relates to a lubricated technical field of bearing specifically is a lubricating structure of power motor bearing for new energy automobile.
Background
The requirement on the service life of a power motor for a new energy automobile is higher and higher, most non-oil-cooled motors are grease-lubricated bearings which are key parts of the power motor, and the bearings cannot be lubricated by lubricating oil, so that most motor manufacturers select imported wide-temperature bearings in consideration of reliability, and compared with domestic bearings of the same type, the price of the bearings is usually several times higher, so that the cost of the motor is high, domestic bearing enterprises are difficult to stand on the aspect of the power motor, and the popularization of new energy power motor products is influenced to a certain extent; due to the natural disadvantage of grease lubrication, the service life of the power motor is restricted.
Disclosure of Invention
In order to solve the problems, the utility model provides a lubricating structure of a power motor bearing for a new energy automobile, which can effectively take away heat of the bearing when a motor shaft rotates at a high speed and huge heat generated by friction between the motor shaft and an oil seal through circulation of lubricating oil; meanwhile, the lubricating oil can keep effective lubrication on the bearing and the oil seal, so that the service life of the bearing is ensured.
The utility model provides a lubricating structure of power motor bearing for new energy automobile which characterized in that: the motor shaft penetrates through a central hole of the motor end cover, the part of the motor end cover corresponding to the central hole is thickened, an inner side oil seal is arranged on the inner side inner ring of the motor end cover corresponding to the central hole, a sealing cover plate is covered on the outer side end face of the motor end cover corresponding to the central hole, a through hole is formed in the area of the sealing cover plate corresponding to the motor shaft, an outer side oil seal is arranged on the inner ring wall of the through hole, the inner ring of the outer side oil seal is sleeved on the corresponding outer ring wall of the motor shaft, a spacing distance is arranged in the space of the inner side oil seal and the outer side oil seal corresponding to the central hole, the motor shaft penetrates through the inner side oil seal and the outer side oil seal, and a pump blade rotor are sleeved on the length, The motor bearing, the outer lane of motor bearing install in bearing installation backstop in the centre bore of motor end cover is structural, the inner chamber of the centre bore of motor end cover forms the pump chamber of pump leaf rotor, the pump chamber quilt inboard oil blanket, outside oil blanket both sides seal the setting, the pump chamber is external to have the corresponding end of oil outlet pipe way, oil return line, and it is still including outside batch oil tank, the entry end on oil outlet pipe way is connected at the top of pump chamber, the exit end on oil outlet pipe way is connected to the upper portion entry more than the highest liquid level position of batch oil tank, the oil inlet of pump chamber is connected the oil outlet end of oil return line in the bottom of batch oil tank, the height of the oil inlet of pump chamber is located position below the lubricating oil liquid level of batch oil tank, the lip mouth of inboard oil blanket, outside oil blanket is arranged in opposite directions, and all sets up towards.
It is further characterized in that:
the pump vane rotor is fixedly sleeved at the corresponding position of the motor shaft in an interference fit manner;
the pump vane rotor is connected with the corresponding position of the motor shaft in a mechanical fixed connection mode, and the mechanical fixed connection placement comprises but is not limited to bolt fixed connection, welding connection and riveting;
the pump vane rotor is positioned on the opposite inner side of the motor shaft relative to the motor bearing, the motor shaft is provided with an inwards concave stopping structure corresponding to the motor bearing, the length position of the motor shaft corresponding to the outer side oil seal is a small-diameter part, the diameter of the small-diameter part is smaller than the outer diameter of the inwards concave stopping structure, and the sealing cover plate is covered on the outer side opening end surface of the central hole, so that the pump vane rotor and the motor bearing can be conveniently and reliably arranged on the motor shaft from the outer side space;
in the state that the motor shaft is horizontally and transversely arranged, the liquid level of lubricating oil in the oil storage tank is higher than the highest point among the inner side oil seal, the outer side oil seal and the motor bearing, so that the lubricating oil positioned in the pump cavity is ensured to submerge the oil seal and the motor bearing;
preferably, the highest point of the outer diameter of the motor bearing is higher than the highest point of the outer diameter of the inner side oil seal, and the highest point of the outer diameter of the inner side oil seal is higher than the highest point of the outer diameter of the outer side oil seal;
the top of the oil storage tank is connected with a vent plug through an upward-protruding exhaust pipeline, the vent plug ensures that the whole internal communication space is balanced with the external atmospheric pressure, and the phenomenon that the air pressure of a storage space is reduced due to the fact that the air pressure is increased due to high temperature or the air pressure of the storage space is reduced due to low temperature is prevented from occurring, and the oil seal is abnormal;
the oil storage tank is directly integrated on the motor end plate, so that the heat dissipation capacity of the lubricating oil is improved;
an upward convex oil return cavity is arranged right above the pump blade rotor, and the top of the oil return cavity is externally connected with an inlet end of an oil outlet pipeline, so that the power of the pump blade rotor is maximized to be used for pumping lubricating oil back to an oil storage tank;
the length of the oil return pipeline is set to be formed by combining a plurality of tangent pipelines, so that the oil return pipeline is lengthened, and the effective heat dissipation of lubricating oil is promoted;
an oil inlet cavity is formed in the pump cavity along the axial position of the motor shaft and is located in a space area between the motor bearing and an outer side oil seal, and an oil inlet of the oil inlet cavity is located at a downstream angle position, relative to the rotation of the pump blade rotor, of the oil return cavity, so that lubricating oil entering the pump cavity is discharged out of the pump cavity and enters the oil return cavity after the oil seal and the motor bearing are fully lubricated by the lubricating oil;
the motor end cover is formed by casting, and the pump cavity in the motor end cover, the oil outlet pipeline and the oil return pipeline confirm the tightness of the whole loop through an air tightness test;
according to different automobile motors, motor bearings and different rotating speeds and working condition requirements, the number and the shape of pump blades of the pump blade rotor are adjusted, so that the flow of lubricating oil in the whole loop is changed, the oil seal lubricating requirements of the motor bearings of different power motors are met, and the sealing reliability of the power motors is improved.
After the utility model is adopted, when the motor rotates at high speed, the pump blade rotor (which can be installed by interference or other various suitable mechanical connection modes) arranged on the motor shaft synchronously rotates along with the motor shaft to drive the lubricating oil to be pumped out through the oil outlet pipeline, and the lubricating oil in the oil storage tank enters the pump cavity through the oil return pipeline; the pumped oil still enters the oil storage tank, so that the circulation of the whole lubricating oil is realized; because the lips of the inner oil seal and the outer oil seal are oppositely arranged and are arranged towards the pump cavity, the lubricating oil in the pump cavity ensures the effective lubrication of the lips; the connecting position of the motor bearing, the motor end cover and the motor shaft has good lubricating performance, and the sealing performance of the connecting position is ensured; the heat of the bearing when the motor shaft rotates at a high speed and the huge heat generated by friction between the motor shaft and the oil seal can be effectively taken away through the circulation of lubricating oil; meanwhile, the lubricating oil can keep effective lubrication on the bearing and the oil seal, so that the service life of the bearing is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure A-A of the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
the motor comprises a motor shaft 1, a motor end cover 2, an inner side oil seal 3, a sealing cover plate 4, a through hole 5, an outer side oil seal 6, a pump blade rotor 7, a motor bearing 8, a bearing installation stop structure 9, a pump cavity 10, an oil outlet pipeline 11, an oil return pipeline 12, an oil storage tank 13, an upper inlet 14, an oil inlet 15, an oil inlet cavity 16, lubricating oil 17, a concave stop structure 18, an exhaust pipeline 19, a vent plug 20 and an oil return cavity 21.
Detailed Description
A lubricating structure of a power motor bearing for a new energy automobile is shown in figures 1 and 2: which comprises a motor shaft 1 and a motor end cover 2, wherein the motor shaft 1 penetrates through a central hole of the motor end cover 2, the part of the motor end cover 2 corresponding to the central hole is thickened, an inner side oil seal 3 is arranged on the inner side of the motor end cover 2 corresponding to the inner ring of the central hole,
the outer side end face of the motor end cover 2 corresponding to the central hole is covered with a sealing cover plate 4, the sealing cover plate 4 is provided with a through hole 5 corresponding to the region of the motor shaft 1, the inner ring wall of the through hole 5 is provided with an outer side oil seal 6, the inner ring of the outer side oil seal 6 is sleeved on the corresponding outer ring wall of the motor shaft 1,
the inner side oil seal 3 and the outer side oil seal 6 are provided with spacing distances corresponding to the space of the central hole, the motor shaft 1 penetrates through the inner side oil seal 3 and the outer side oil seal 6, the pump blade rotor 7 and the motor bearing 8 are sleeved on the length of the motor shaft 1 between the inner side oil seal 3 and the outer side oil seal 6 at intervals, the outer ring of the motor bearing 8 is arranged on a bearing installation stopping structure 9 in the central hole of the motor end cover 2,
the inner cavity of the central hole of the motor end cover 2 forms a pump cavity 10 of the pump blade rotor 7, the pump cavity 10 is sealed by the inner side oil seal 3 and the two sides of the outer side oil seal 6, the pump cavity 10 is externally connected with an oil outlet pipeline 11 and the corresponding end of an oil return pipeline 12, the pump cavity further comprises an external oil storage tank 13, the top of the pump cavity 10 is connected with the inlet end of the oil outlet pipeline 11, the outlet end of the oil outlet pipeline 11 is connected to an upper inlet 14 above the highest liquid level position of the oil storage tank 13, an oil inlet 15 of the pump cavity 10 is connected with the oil outlet end of the oil return pipeline 12 at the bottom of the oil storage tank 13, the height of the oil inlet 15 of the pump cavity 10 is located below the liquid level 17 of lubricating oil of the oil storage tank 13, and the.
The pump vane rotor 7 is fixedly sleeved at the corresponding position of the motor shaft 1 through interference fit; or the pump vane rotor 7 is connected with the corresponding position of the motor shaft 1 in a mechanical fixed connection mode, and the mechanical fixed connection placement comprises but is not limited to bolt fixed connection, welding connection and riveting;
the pump vane rotor 7 is located on the opposite inner side of the motor shaft 1 relative to the motor bearing 8, the motor shaft 1 is provided with a concave stopping structure 18 corresponding to the motor bearing 8, the length position of the motor shaft 1 corresponding to the outer side oil seal 6 is a small-diameter part, the diameter of the small-diameter part is smaller than the outer diameter of the concave stopping structure 18, and the sealing cover plate 4 is covered on the outer side opening end face of the central hole, so that the pump vane rotor 7 and the motor bearing 8 can be conveniently and reliably installed on the motor shaft 1 from the outer side space;
when the motor shaft 1 is horizontally and transversely arranged, the liquid level of the lubricating oil in the oil storage tank 13 is higher than the highest point among the inner side oil seal 3, the outer side oil seal 6 and the motor bearing 8, so that the lubricating oil positioned in the pump cavity 10 is ensured to submerge the oil seal and the motor bearing 8.
In the specific embodiment, the maximum point of the outer diameter of the motor bearing 8 is higher than the maximum point of the outer diameter of the inner oil seal 3, and the maximum point of the outer diameter of the inner oil seal 3 is higher than the maximum point of the outer diameter of the outer oil seal 6;
the top of the oil storage tank 13 is connected with a vent plug 20 through an upward-protruding exhaust pipeline 19, the vent plug 20 ensures that the whole internal communication space is balanced with the external atmospheric pressure, and the abnormal oil seal caused by the fact that the air pressure of the storage space is reduced due to the fact that the air pressure is increased due to high temperature or the air pressure of the storage space is reduced due to low temperature is prevented;
the oil storage tank 13 is directly integrated on the motor end plate 2, so that the heat dissipation capacity of the lubricating oil is improved;
an upward convex oil return cavity 21 is arranged right above the pump blade rotor 7, and the top of the oil return cavity 21 is externally connected with an inlet end of an oil outlet pipeline 11, so that the power of the pump blade rotor 2 is maximized for pumping lubricating oil back to the oil storage tank 13;
an oil inlet cavity 16 is formed in the pump cavity 10 along the axial direction of the motor shaft 1, the oil inlet cavity 16 is located in a space area between the motor bearing 8 and the outer side oil seal 6, an oil inlet 15 of the oil inlet cavity 16 is located at a downstream angle position of the oil return cavity 21 relative to the rotation of the pump blade rotor 7, and lubricating oil entering the pump cavity 10 is guaranteed to be discharged out of the pump cavity 10 and enter the oil return cavity 21 after the oil seal and the motor bearing 8 are fully lubricated;
the length of the oil return pipeline 12 is set to be formed by combining a plurality of tangent pipelines, so that the oil return pipeline 12 is lengthened, and the effective heat dissipation of lubricating oil is promoted;
the motor end cover 2 is formed by casting, and the sealing performance of the whole loop is confirmed by an air tightness test of a pump cavity in the motor end cover 2, an oil outlet pipeline and an oil return pipeline;
according to different automobile motors, motor bearings 8 and different rotating speeds and working condition requirements, the number and the shape of the pump blades of the pump blade rotor 2 are adjusted, so that the flow of lubricating oil in the whole loop is changed, the oil seal lubricating requirements of the motor bearings of different power motors are met, and the sealing reliability of the power motors is improved.
The working principle is as follows: when the motor rotates at a high speed, a pump blade rotor (which can be installed in an interference or other various suitable mechanical connection modes) arranged on a motor shaft synchronously rotates along with the motor shaft to drive lubricating oil to be pumped out through an oil outlet pipeline, and the lubricating oil in the oil storage tank enters a pump cavity through an oil return pipeline; the pumped oil still enters the oil storage tank, so that the circulation of the whole lubricating oil is realized; because the lips of the inner oil seal and the outer oil seal are oppositely arranged and are arranged towards the pump cavity, the lubricating oil in the pump cavity ensures the effective lubrication of the lips; the connecting position of the motor bearing, the motor end cover and the motor shaft has good lubricating performance, and the sealing performance of the connecting position is ensured; the heat of the bearing when the motor shaft rotates at a high speed and the huge heat generated by friction between the motor shaft and the oil seal can be effectively taken away through the circulation of lubricating oil; meanwhile, the lubricating oil can keep effective lubrication on the bearing and the oil seal, so that the service life of the bearing is ensured.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a lubricating structure of power motor bearing for new energy automobile which characterized in that: the motor shaft penetrates through a central hole of the motor end cover, the part of the motor end cover corresponding to the central hole is thickened, an inner side oil seal is arranged on the inner side inner ring of the motor end cover corresponding to the central hole, a sealing cover plate is covered on the outer side end face of the motor end cover corresponding to the central hole, a through hole is formed in the area of the sealing cover plate corresponding to the motor shaft, an outer side oil seal is arranged on the inner ring wall of the through hole, the inner ring of the outer side oil seal is sleeved on the corresponding outer ring wall of the motor shaft, a spacing distance is arranged in the space of the inner side oil seal and the outer side oil seal corresponding to the central hole, the motor shaft penetrates through the inner side oil seal and the outer side oil seal, and a pump blade rotor are sleeved on the length, The motor bearing, the outer lane of motor bearing install in bearing installation backstop in the centre bore of motor end cover is structural, the inner chamber of the centre bore of motor end cover forms the pump chamber of pump leaf rotor, the pump chamber quilt inboard oil blanket, outside oil blanket both sides seal the setting, the pump chamber is external to have the corresponding end of oil outlet pipe way, oil return line, and it is still including outside batch oil tank, the entry end on oil outlet pipe way is connected at the top of pump chamber, the exit end on oil outlet pipe way is connected to the upper portion entry more than the highest liquid level position of batch oil tank, the oil inlet of pump chamber is connected the oil outlet end of oil return line in the bottom of batch oil tank, the height of the oil inlet of pump chamber is located position below the lubricating oil liquid level of batch oil tank, the lip mouth of inboard oil blanket, outside oil blanket is arranged in opposite directions, and all sets up towards.
2. The lubricating structure of the power motor bearing for the new energy automobile according to claim 1, characterized in that: the pump blade rotor is located on the opposite inner side of the motor shaft relative to the motor bearing, an inwards concave stopping structure is arranged at the position, corresponding to the motor bearing, of the motor shaft, a small-diameter portion is arranged at the length position, corresponding to the outer side oil seal, of the motor shaft, the diameter of the small-diameter portion is smaller than the outer diameter of the inwards concave stopping structure, and the sealing cover plate covers the outer side opening end face of the central hole.
3. The lubricating structure of the power motor bearing for the new energy automobile according to claim 1, characterized in that: and under the condition that the motor shaft is horizontally and transversely arranged, the liquid level of lubricating oil in the oil storage tank is higher than the highest point among the inner side oil seal, the outer side oil seal and the motor bearing.
4. The lubricating structure of the power motor bearing for the new energy automobile according to claim 3, characterized in that: the maximum point of the outer diameter of the motor bearing is higher than that of the outer diameter of the inner side oil seal, and the maximum point of the outer diameter of the inner side oil seal is higher than that of the outer side oil seal.
5. The lubricating structure of the power motor bearing for the new energy automobile according to claim 1, characterized in that: the top of the oil storage tank is connected with a vent plug through an upwards-protruding exhaust pipeline, and the vent plug ensures that the whole internal communication space is balanced with the external atmospheric pressure.
6. The lubricating structure of the power motor bearing for the new energy automobile according to claim 1, characterized in that: the oil storage tank is directly integrated on the motor end plate.
7. The lubricating structure of the power motor bearing for the new energy automobile according to claim 1, characterized in that: an upward protruding oil return cavity is arranged right above the pump blade rotor, and the top of the oil return cavity is externally connected with an inlet end of an oil outlet pipeline.
8. The lubricating structure of the power motor bearing for the new energy automobile according to claim 1, characterized in that: the length of the oil return pipeline is set to be formed by combining a plurality of tangent pipelines.
9. The lubricating structure of the power motor bearing for the new energy automobile according to claim 7, characterized in that: an oil inlet cavity is arranged in the pump cavity along the axial position of the motor shaft, the oil inlet cavity is located in a space area between the motor bearing and an outer side oil seal, and an oil inlet of the oil inlet cavity is located in a downstream angle position, relative to the rotation of the pump vane rotor, of the oil return cavity.
10. The lubricating structure of the power motor bearing for the new energy automobile according to claim 1, characterized in that: according to different automobile motors, motor bearings and different rotating speeds and working condition requirements, the number and the shape of pump blades of the pump blade rotor are adjusted, so that the flow of lubricating oil in the whole loop is changed, the oil seal lubricating requirements of the motor bearings of different power motors are met, and the sealing reliability of the power motors is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921432812.8U CN212056677U (en) | 2019-08-30 | 2019-08-30 | Lubricating structure of power motor bearing for new energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921432812.8U CN212056677U (en) | 2019-08-30 | 2019-08-30 | Lubricating structure of power motor bearing for new energy automobile |
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| CN212056677U true CN212056677U (en) | 2020-12-01 |
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| CN201921432812.8U Active CN212056677U (en) | 2019-08-30 | 2019-08-30 | Lubricating structure of power motor bearing for new energy automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425404A (en) * | 2019-08-30 | 2019-11-08 | 苏州绿控新能源科技有限公司 | A kind of lubrication system of new-energy automobile power motor bearing |
| CN114123607A (en) * | 2021-11-29 | 2022-03-01 | 浙江义乌市自来水有限公司 | Insulation system for preventing shaft current of motor |
-
2019
- 2019-08-30 CN CN201921432812.8U patent/CN212056677U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425404A (en) * | 2019-08-30 | 2019-11-08 | 苏州绿控新能源科技有限公司 | A kind of lubrication system of new-energy automobile power motor bearing |
| CN114123607A (en) * | 2021-11-29 | 2022-03-01 | 浙江义乌市自来水有限公司 | Insulation system for preventing shaft current of motor |
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