CN215871090U - Wheel hub motor cooling structure - Google Patents
Wheel hub motor cooling structure Download PDFInfo
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- CN215871090U CN215871090U CN202122072154.XU CN202122072154U CN215871090U CN 215871090 U CN215871090 U CN 215871090U CN 202122072154 U CN202122072154 U CN 202122072154U CN 215871090 U CN215871090 U CN 215871090U
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Abstract
The utility model relates to a wheel hub motor cooling structure, which comprises a motor main body, wherein the motor main body comprises a motor shaft, a stator support, a stator, a rotor and an end cover, a cooling pipeline is arranged in the motor main body, two ends of the cooling pipeline extend out of the motor main body and are respectively connected with an external air filter and a vacuum pump, a pipe support is arranged on the motor shaft, an inlet and an outlet of the cooling pipeline are limited by the pipe support, and the cooling pipeline is annularly arranged in the motor main body along the contour of the stator; or the two sides of the stator are spirally distributed, and the two groups of spiral cooling pipelines fall in two parallel planes. And the cooling pipeline cools the whole temperature of the motor, and the heat generated by the winding when the motor runs is taken out of the motor through the flowing of the cooling medium of the cooling pipeline. The utility model has simple cooling structure and greatly reduces the probability of liquid leakage.
Description
Technical Field
The utility model relates to the technical field of hub motors, in particular to a cooling structure of a hub motor.
Background
Along with the increasingly popular market of electric bicycles and electric motorcycles, the requirements on the performance and the functions of the electric bicycle are also improved. The driving hub motor system is used as a core component of the electric vehicle, and the heat dissipation is a main difficult problem.
At present, the heat dissipation mode of the common electric vehicle motor on the market is relatively lagged behind, and the heat dissipation effect is poor. When the electric vehicle is overloaded and ridden, the temperature in the motor rises rapidly, and after the temperature rises to a certain degree, the magnetic steel of the motor is demagnetized, and the insulating capability is reduced, so that the reliability of the motor of the electric vehicle is seriously reduced. This is why the quality guarantee time of the electric vehicle motor in the market is maintained at 2-3 years.
With the increase of the demand of consumers on high-power electric vehicles, the temperature rise speed of the hub motor of the common high-power electric vehicle on the market is difficult to meet the normal use; because the motor power is higher, calorific capacity is bigger, under the prerequisite that motor heat-sinking capability can not promote, just be the problem of motor magnet steel demagnetization, but the motor coil of possible direct burning out.
In order to improve the heat dissipation problem, some liquid cooling motors appear on the market, and the liquid cooling motors have the defect that the leakage of cooling liquid is easy to occur, so that electronic elements in the motors are soaked and damaged. In addition, the cold motor of oil in addition, fluid incessantly erodees in the motor cavity, increases mechanical resistance, leads to motor efficiency to descend to still cause the magnet steel bonding glue ageing easily, in case the magnet steel drops, will lead to the motor to sweep the thorax and stifled commentaries on classics suddenly, have huge potential safety hazard.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides the wheel hub motor cooling structure with a reasonable structure, the cooling medium channel is fixed on the stator bracket or the winding, and the leakage is not easy to occur due to the damage of the sealing element of the motor, so that the reliability of the motor is improved, and the service life is prolonged; meanwhile, the mechanical resistance cannot be increased, and the power density of the motor is improved.
The technical scheme adopted by the utility model is as follows:
a wheel hub motor cooling structure comprises a motor main body, wherein the motor main body comprises a motor shaft, a stator, a rotor and an end cover, a cooling pipeline is arranged in the motor main body, two ends of the cooling pipeline extend out of the motor main body and are respectively connected with an external air filter and a vacuum pump,
the motor shaft is provided with a pipe bracket, the inlet and the outlet of the cooling pipeline are limited by the pipe bracket,
the cooling pipeline is annularly arranged in the motor main body along the contour of the stator; or the two sides of the stator are spirally distributed, and the two groups of spiral cooling pipelines fall in two parallel planes.
The pipe support comprises a support body, a pipe hole used for containing a motor shaft is formed in the circle center of the support body, a wire outlet used for containing a cooling pipeline is formed in the eccentric position of the support body, and a glue injection hole communicated with the wire outlet is formed in the arc surface of the support body.
And a sealing element is arranged at one end of the wire outlet hole extending into the motor main body, and the inner diameter of the sealing element is smaller than that of the wire outlet hole.
The outer circle surface of the sealing element is provided with a groove, the outer diameter of the sealing element is matched with the inner diameter of the wire outlet hole, and the bottom of the support body is correspondingly embedded into the groove of the sealing element.
The pipe support is a prefabricated part and is in interference fit with the motor shaft, or the pipe support and the motor shaft are integrally arranged.
The cooling pipeline is coated with pouring sealant, and the pouring sealant is arranged near the stator; and a temperature sensor is arranged in the stator winding.
The cooling pipelines which are spirally distributed are arranged along the Archimedes spiral, and limiting rods are pressed on the cooling pipelines; one end of the limiting rod is fixed on the motor stator support, and the other end of the limiting rod is propped against the inner wall of the stator support; and one side of the limiting rod facing the cooling pipeline is provided with an inward concave arc matched with the outer circle surface of the cooling pipeline.
And the contact position of the cooling pipeline and the stator is coated with insulating glue.
The utility model has the following beneficial effects:
the utility model has compact and reasonable structure and convenient operation, increases the area of the heat dissipation pipeline in the motor on the premise of not influencing the original design of the motor, and greatly improves the heat dissipation capability, the power density and the working reliability of the motor.
The cooling pipeline is arranged in the motor to cool the whole temperature of the motor, and the heat generated by the winding when the motor runs is taken out of the motor through the flowing of the cooling medium of the cooling pipeline.
According to the utility model, the temperature sensor is arranged at the stator winding, so that the flow of the cooling medium can be determined according to different working conditions, and the energy loss can be effectively saved.
The external vacuum pressure pump extracts cooling medium, the cooling medium flows into the cooling pipeline inside the motor and flows in the spiral pipeline, the cooling structure is simple, the cooling temperature is intelligently controlled through the temperature sensor, the required energy consumption is low, the probability of liquid leakage is greatly reduced, the reliability of the motor is improved, the service life of the motor is prolonged, and the power density of the motor is increased.
According to the utility model, the stator winding and the cooling pipe are encapsulated by the potting adhesive, and the potting adhesive can fix the cooling pipeline, increase the heat conductivity of the stator part and reduce the mechanical damage of the motor in a severe environment.
The cooling structure is particularly suitable for the hub motor structure of the motorcycle, is easy to install, has strong heat-conducting property, can be used for the surface-mounted hub motor and the salient-pole hub motor with the SPOKE structure on the market at the present stage, basically does not need to change the motor structure, has low development cost, and is suitable for most of motors of two-wheeled motorcycles.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view of the end cap of the present invention with the end cap hidden.
Fig. 3 is a schematic view of the internal structure of fig. 2.
FIG. 4 is a schematic structural view of another embodiment of the present invention with the end cap hidden.
Fig. 5 is a schematic view of the internal structure of fig. 4.
Fig. 6 is a radial cross-sectional view of the present invention.
Fig. 7 is an enlarged view of a portion a of fig. 6 for showing the structure of the potting adhesive.
FIG. 8 is a side view of the tube support of the present invention.
Fig. 9 is a sectional view a-a in fig. 8.
Fig. 10 is a top view of a tube support of the present invention.
Fig. 11 is a sectional view taken along line B-B of fig. 10.
Wherein: 1. a motor shaft; 2. a stator; 3. an end cap; 4. a cooling duct; 5. a tube support; 6. pouring a sealant; 7. a temperature sensor; 8. a limiting rod; 9. air filtering; 10. a vacuum pressure pump, 11 stator supports;
501. a stent body; 502. a tube hole; 503. a wire outlet hole; 504. injecting glue holes; 505. and a seal.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1-11, the cooling structure of the hub motor of the present embodiment includes a motor main body, the motor main body includes a motor shaft 1, a stator 2, a rotor and an end cover 3, a cooling pipe 4 is disposed in the motor main body, two ends of the cooling pipe 4 extend out of the motor main body and are respectively connected to an external air filter and a vacuum pump,
a pipe bracket 5 is arranged on the motor shaft 1, the inlet and the outlet of the cooling pipeline 4 are limited by the pipe bracket 5,
the cooling pipeline 4 is annularly arranged in the motor main body along the outline of the stator 2; or the two sides of the stator 2 are spirally distributed, and the two groups of spiral cooling pipelines 4 fall in two parallel planes.
The pipe support 5 comprises a support body 501, a through hole 502 used for accommodating the motor shaft 1 is arranged at the center of the support body 501, an outlet hole 503 used for accommodating the cooling pipeline 4 is arranged at the eccentric position of the support body 501, and a glue injection hole 504 communicated with the outlet hole 503 is arranged on the arc surface of the support body 501.
One end of the outlet hole 503 extending into the motor body is provided with a sealing member 505, and the inner diameter of the sealing member 505 is smaller than that of the outlet hole 503.
The outer circle surface of the sealing element 505 is provided with a groove, the outer diameter of the sealing element 505 is matched with the inner diameter of the wire outlet hole 503, and the bottom of the bracket body 501 is correspondingly embedded into the groove of the sealing element 505.
The pipe support 5 is a prefabricated part and is in interference fit with the motor shaft 1, or the pipe support 5 and the motor shaft 1 are integrally arranged.
The cooling pipeline 4 is coated with pouring sealant 6, and the pouring sealant 6 is arranged near the stator 2; a temperature sensor 7 is mounted in the stator 2 winding.
The pouring sealant 6 forms an annular shape with a groove on the outer wall, and the stator 2 falls in the groove on the pouring sealant 6.
The cooling pipeline 4 which is spirally distributed is arranged along the Archimedes spiral, and a limiting rod 8 is pressed on the cooling pipeline 4; one end of the limiting rod 8 is propped against the motor shaft 1, and the other end of the limiting rod is propped against the inner wall of the stator 2; one side of the limiting rod 8 facing the cooling pipeline 4 is provided with an inward concave arc matched with the outer circle surface of the cooling pipeline 4.
The contact position of the cooling pipeline 4 and the stator 2 is coated with insulating glue.
The specific structure and working process of the embodiment are as follows:
fig. 1 is a schematic view of the overall structure of the present invention, and is a common hub motor shape.
As shown in fig. 2 and 3, in the in-wheel motor, cooling ducts 4 are provided along two end surfaces of the stator 2, two ends of the cooling ducts 4 are limited near the motor shaft 1, and a main body portion of the cooling ducts 4 is spirally arranged in the in-wheel motor in a planar manner. Annular array has three gag lever posts 8 on the plane that cooling tube 4 formed, and gag lever post 8 sets up to a plurality of indent arcs towards one side of cooling tube 4, and the surface laminating of excircle with cooling tube 4 carries on spacingly.
Referring to fig. 6 and 7 in combination, the inlet and outlet positions of the cooling pipeline 4 are limited by the pipe bracket 5, the inlet and outlet of the cooling pipeline 4 are respectively connected with an external vacuum pressure pump 10 and an air filter 9, the vacuum pressure pump 10 presses cooling liquid into the cooling pipeline 4, and the cooling liquid flows in the cooling pipeline 4 to realize heat transfer and then returns to the air filter 9.
In order to stabilize the limiting cooling pipeline 4, pouring sealant 6 is poured at the position, close to the stator 2, of the cooling pipeline 4, the pouring sealant 6 wraps the stator 2, and the cooling pipeline 4 is wrapped inside the pouring sealant 6.
As shown in fig. 7 to 11, the bracket body 501 of the tube bracket 5 is cylindrical, a step is formed at the top end of the bracket body 501, and a tube hole 502 is formed at the center of the bracket body 501 for accommodating the motor shaft 1; on one side of the tube bore 502 there are two side-by-side outlet bores 503 for receiving the inlet and outlet of the cooling duct 4. As shown in fig. 9 and 11, a sealing member 505 is provided at the bottom of the outlet hole 503, and the sealing member 505 is made of rubber and is pressed against the inner wall of the outlet hole 503. In order to improve the relative stability, the middle position of the outer wall of the sealing element 505 is grooved, and the bottom of the bracket body 501 is attached to the contour of the outer wall of the sealing element 505 to limit the sealing element 505.
The temperature sensor 7 is arranged in the middle of the winding slot of the stator 2, or can be arranged on the end winding of the motor, and heat-conducting silicone grease is coated on the temperature sensor 7, so that the accuracy of temperature collection is ensured, the performance of the motor is fully exerted, and the energy loss is reduced.
The pipe support 5 has two processing modes, one is to be integrally processed and formed with the motor shaft 1, and the other is to be respectively processed with the pipe support 5 and the motor shaft 1, and then the motor shaft 1 is pressed into the pipe hole 502 of the pipe support 5 in an interference manner.
As an alternative embodiment, as shown in fig. 4 and 5, the spiral-type cooling ducts 4 may be replaced with cooling ducts 4 arranged annularly along the stator 2, i.e., a coil cooling manner.
In the coil cooling structure, cooling pipelines 4 are fixed at two ends of a stator 2 winding, insulating glue is coated at the contact position of the cooling pipelines 4 and the stator 2, and the two ends of the stator 2 bracket wall close to the stator 2 iron core are arranged at the positions of the cooling pipelines 4. The epoxy potting compound 6 is used to pot the cooling pipe 4 in the coil cooling structure. Epoxy potting glue 6 can effectively take away the heat that stator 2 produced, plays the effect of shocking resistance simultaneously, when stabilizing cooling tube 4, reduces because of the motor abnormal sound that cooling tube 4 rocked and cause, improves the security.
The utility model is connected with the inlet and the outlet of the cooling pipeline 4 through the hose, after the medium enters the cooling pipeline 4, the air in the cooling pipeline 4 is extruded out, and then the liquid medium carries out liquid cooling heat exchange. The position for containing the pouring sealant 6 is reserved on the inner wall of the wire outlet hole 503 on the pipe support 5, the position is a sealant storage groove, the pouring sealant 6 in the sealant storage groove is used for sealing, or an elastic member such as a rubber ring is used for replacing the pouring sealant 6 for sealing, so that air and water are prevented from directly entering the motor to cause damage.
The glue injection hole 504 on the pipe support 5 is arranged on the side wall of the support body 501 and is perpendicular to the pipe hole 502, so that the flowability of tax payment is facilitated during gluing, and the sealing performance of a finished product is not easily influenced. As an alternative embodiment, the potting compound 6 can also be replaced by a rubber spring.
The utility model has simple structure and does not influence the original design of the motor, so the improvement of the utility model only can be beneficial to the heat dissipation of the motor and can not influence the normal operation of other functions of the motor; the utility model has outstanding heat dispersion performance, strong universality in the field of motors of two-wheeled motorcycles, can be used for surface-mounted hub motors and salient-pole hub motors with SPOKE structures on the market at the present stage, and has convenient transformation and low development cost.
The above description is intended to illustrate the present invention and not to limit the present invention, which is defined by the scope of the claims, and may be modified in any manner within the scope of the present invention.
Claims (9)
1. The utility model provides an in-wheel motor cooling structure, includes motor main body, motor main body includes motor shaft (1), stator support (11), stator (2), rotor and end cover (3), its characterized in that: the motor main body is internally provided with a cooling pipeline (4), two ends of the cooling pipeline (4) extend out of the motor main body and are respectively connected with an external air filter and a vacuum pump,
a pipe bracket (5) is arranged on the motor shaft (1), the inlet and the outlet of the cooling pipeline (4) are limited by the pipe bracket (5),
the cooling pipeline (4) is annularly arranged in the motor main body along the outline of the stator (2); or the two sides of the stator (2) are spirally distributed, and the two groups of spiral cooling pipelines (4) fall in two parallel planes.
2. A wheel hub motor cooling structure as claimed in claim 1, wherein: the pipe support (5) comprises a support body (501), a pipe hole (502) used for containing the motor shaft (1) is formed in the circle center of the support body (501), an outlet hole (503) used for containing the cooling pipeline (4) is formed in the eccentric position of the support body (501), and a glue injection hole (504) communicated with the outlet hole (503) is formed in the arc surface of the support body (501).
3. A wheel hub motor cooling structure as claimed in claim 2, wherein: one end of the wire outlet hole (503) extending into the motor main body is provided with a sealing element (505), and the inner diameter of the sealing element (505) is smaller than that of the wire outlet hole (503).
4. A wheel hub motor cooling structure as claimed in claim 3, wherein: the outer circle surface of the sealing element (505) is provided with a groove, the outer diameter of the sealing element (505) is matched with the inner diameter of the wire outlet hole (503), and the bottom of the bracket body (501) is correspondingly embedded into the groove of the sealing element (505).
5. A wheel hub motor cooling structure as claimed in claim 3, wherein: the pipe support (5) is a prefabricated part and is in interference fit with the motor shaft (1), or the pipe support (5) and the motor shaft (1) are integrally arranged.
6. A wheel hub motor cooling structure as claimed in claim 1, wherein: the cooling pipeline (4) is coated with pouring sealant (6), and the pouring sealant (6) is arranged near the stator (2); and a temperature sensor (7) is arranged in the winding of the stator (2).
7. A wheel hub motor cooling structure as claimed in claim 6, wherein: pouring sealant (6) stator (2), cooling tube (4) and stator support (11) form the annular that the outer wall has the recess, and stator (2) fall in the recess on pouring sealant (6).
8. A wheel hub motor cooling structure as claimed in claim 1, wherein: the cooling pipelines (4) which are spirally distributed are arranged along the Archimedes spiral, and the limiting rods (8) are pressed on the cooling pipelines (4); one end of the limiting rod (8) is fixed at the position of the motor stator support (11), and the other end of the limiting rod is fixed on the inner wall of the stator support (11); one side of the limiting rod (8) facing the cooling pipeline (4) is provided with an inward concave arc matched with the outer circle surface of the cooling pipeline (4).
9. A wheel hub motor cooling structure as claimed in claim 1, wherein: the contact position of the cooling pipeline (4) and the stator (2) is coated with insulating glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122072154.XU CN215871090U (en) | 2021-08-30 | 2021-08-30 | Wheel hub motor cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122072154.XU CN215871090U (en) | 2021-08-30 | 2021-08-30 | Wheel hub motor cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215871090U true CN215871090U (en) | 2022-02-18 |
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ID=80244129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122072154.XU Active CN215871090U (en) | 2021-08-30 | 2021-08-30 | Wheel hub motor cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215871090U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459479A (en) * | 2022-11-11 | 2022-12-09 | 台州市黄岩博创工业设计股份有限公司 | Hub motor |
| CN116032070A (en) * | 2023-03-25 | 2023-04-28 | 厚华(天津)动力科技有限公司 | Hub motor |
-
2021
- 2021-08-30 CN CN202122072154.XU patent/CN215871090U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459479A (en) * | 2022-11-11 | 2022-12-09 | 台州市黄岩博创工业设计股份有限公司 | Hub motor |
| CN115459479B (en) * | 2022-11-11 | 2023-02-21 | 台州市黄岩博创工业设计股份有限公司 | Hub motor |
| CN116032070A (en) * | 2023-03-25 | 2023-04-28 | 厚华(天津)动力科技有限公司 | Hub motor |
| CN116032070B (en) * | 2023-03-25 | 2023-06-23 | 厚华(天津)动力科技有限公司 | Hub motor |
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