Liquid cooling hub motor and vehicle

Abstract

The utility model belongs to the technical field of vehicle motors, and discloses a liquid cooling hub motor and a vehicle. The flow guide device comprises a flow guide cover and a plurality of skirt lining rings arranged on the flow guide cover in a protruding mode, the skirt lining rings are arranged on the side, close to the motor end cover, of the flow guide cover, the skirt lining rings and the motor end cover are attached to form a containing cavity, and the flow guide cover is provided with a plurality of flow guide holes in one-to-one correspondence with the skirt lining rings. The flow guide hole can communicate with the containing cavity and a motor working chamber of the liquid-cooled hub motor, and the containing cavity can contain cooling liquid. The arrangement of the flow guide device optimizes the flow path of the cooling liquid in the liquid-cooled hub motor, increases the cooling area of the cooling liquid to the liquid-cooled hub motor, improves the heat exchange efficiency of the cooling liquid and the liquid-cooled hub motor, transmits the heat to the motor end cover and other parts, better radiates the heat generated by the liquid-cooled hub motor, and improves the cooling efficiency of the liquid-cooled hub motor. The cooling effect of the liquid-cooled hub motor is improved, and the stability and reliability of the liquid-cooled hub motor are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle motors, in particular to a liquid-cooled hub motor and a vehicle. Background Art

[0002] The wheel hub motor transmits driving force by placing the electric motor inside the wheel hub of the car. It adopts direct drive mode, that is, the electric motor is directly connected to the wheel axle of the vehicle, without traditional transmission devices such as drive shaft and differential. By integrating the drive device, transmission device and brake device into the wheel hub, the mechanical part is greatly simplified and the transmission efficiency is improved. Traditional wheel hub motors use natural heat dissipation to dissipate heat through the heat sink of the motor housing. However, in high temperature environment, the heat of the motor is difficult to be effectively dissipated, resulting in motor performance degradation or burning.

[0003] The prior art discloses an integrated cover for a hub motor and a hub motor with the integrated cover. The integrated cover for the hub motor comprises a cover body, a first convex ring arranged on the circumferential edge of the cover body, and a second convex ring extending upward along the outer ring opening of the first convex ring. A plurality of oil inlet holes are opened on the circumferential position of the cover body, and a plurality of oil drain grooves are evenly distributed on the first convex ring. The cover body is connected to a circulating heat dissipation cover to form a circulating cooling chamber. The cover body, a right cover of a motor and an electronic outer rotor are connected to form a motor working chamber. The motor working chamber and the circulating cooling chamber are interconnected through the oil drain grooves and the cooling holes.

[0004] However, the hub motor has the following technical problems: under the action of gravity, even if the motor rotates, only a small amount of coolant is brought to the high place of the circulating cooling chamber, which is not conducive to sufficient cooling of the motor and has low cooling efficiency. Utility Model Content

[0005] The utility model aims to provide a liquid-cooled wheel hub motor and a vehicle, so as to solve the problem that the existing liquid-cooled wheel hub motor cannot be fully cooled and has low cooling efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] On the one hand, the utility model proposes a liquid-cooled hub motor, including a motor end cover, the liquid-cooled hub motor also including a flow guide device connected to the motor end cover, the flow guide device including a flow guide cover and a plurality of skirt bushings protruding from the flow guide cover, the plurality of skirt bushings being arranged on a side of the flow guide cover close to the motor end cover, the skirt bushings being fitted with the motor end cover and forming a accommodating cavity, the flow guide cover being provided with a plurality of flow guide holes corresponding one-to-one to the plurality of skirt bushings, the flow guide holes being able to connect the accommodating cavity and the motor working chamber of the liquid-cooled hub motor, the accommodating cavity being able to accommodate coolant.

[0008] As a preferred technical solution of the above-mentioned liquid-cooled hub motor, a plurality of the skirt lining rings are rotationally symmetrically arranged along the axial direction of the guide cover.

[0009] As a preferred technical solution for the above-mentioned liquid-cooled hub motor, the skirt lining ring includes a beveled skirt connected to the hole wall of the guide hole, and the beveled skirt is arranged on the side of the guide cover close to the axial direction, and the outer diameter of the beveled skirt gradually decreases in the direction close to the guide cover.

[0010] As a preferred technical solution of the above-mentioned liquid-cooled hub motor, the flow guide device also includes reinforcing ribs, and the reinforcing ribs are arranged on the outer peripheral edge of the flow guide cover close to the motor end cover.

[0011] As a preferred technical solution for the above-mentioned liquid-cooled hub motor, the guide device also includes a plurality of guide baffles arranged on the side of the guide cover away from the motor end cover, and the plurality of guide baffles are arranged in a one-to-one correspondence with the plurality of guide holes, and the guide baffles are used to guide the coolant to flow into the accommodating cavity through the guide holes.

[0012] As a preferred technical solution for the above-mentioned liquid-cooled hub motor, the guide device also includes a plurality of arc plates, which are all arranged at the end of the guide cover away from the motor end cover, and the plurality of arc plates are connected to the plurality of guide baffles in a one-to-one correspondence, and the arc plates are used to guide the coolant to spray to the center of the motor working room.

[0013] As a preferred technical solution of the above-mentioned liquid-cooled hub motor, the liquid-cooled hub motor further includes a connecting piece, the guide cover is provided with a plurality of connecting holes, and the connecting piece passes through the connecting holes and is connected to the motor end cover.

[0014] As a preferred technical solution of the above-mentioned liquid-cooled hub motor, the guide cover is made of plastic material.

[0015] As a preferred technical solution for the above-mentioned liquid-cooled hub motor, the flow guide device is integrally formed.

[0016] On the other hand, the utility model further proposes a vehicle, comprising a wheel and a liquid-cooled hub motor as described in any of the above schemes, wherein the liquid-cooled hub motor is installed on the wheel.

[0017] Beneficial effects of the utility model:

[0018] The liquid-cooled hub motor proposed in the utility model comprises a motor end cover and a flow guide device connected to the motor end cover, the flow guide device comprises a flow guide cover and a plurality of skirt bushings protruding from the flow guide cover, the plurality of skirt bushings are arranged on a side of the flow guide cover close to the motor end cover, the skirt bushings fit with the motor end cover and form a accommodating cavity, the flow guide cover is provided with a plurality of flow guide holes corresponding to the plurality of skirt bushings one by one, the flow guide holes can connect the accommodating cavity and the motor working chamber of the liquid-cooled hub motor, and the accommodating cavity can accommodate coolant. When the liquid-cooled hub motor is in a stationary state, the coolant inside the hub motor is concentrated at the bottom of the motor, and only the stator assembly and other parts at the bottom of the motor are cooled; due to the setting of the guide hole, coolant is distributed on both sides of the guide device. When the liquid-cooled hub motor starts to rotate, the coolant in the accommodating cavity can be brought to the top of the liquid-cooled hub motor as the accommodating cavity rotates. When a certain height is reached, the coolant will flow out of the accommodating cavity through the guide hole and spray into the motor working room, so that the stator assembly and other parts of the liquid-cooled hub motor can be fully cooled. The setting of the guide device optimizes the flow path of the coolant inside the liquid-cooled hub motor, increases the cooling area of ​​the liquid-cooled hub motor by the coolant, improves the heat exchange efficiency between the coolant and the liquid-cooled hub motor, and transfers the heat to the motor end cover and other components, so as to better dissipate the heat generated by the liquid-cooled hub motor, improve the cooling effect of the liquid-cooled hub motor, and thus improve the stability and reliability of the liquid-cooled hub motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the cooperation between the motor end cover and the flow guide device of the liquid-cooled hub motor proposed by the utility model;

[0020] Figure 2 This is the first axonometric view of the flow guide device of the liquid-cooled hub motor proposed by the utility model;

[0021] Figure 3 It is a second axonometric view of the flow guide device of the liquid-cooled hub motor proposed by the utility model;

[0022] Figure 4 It is a third axonometric view of the flow guide device of the liquid-cooled hub motor proposed by the utility model;

[0023] Figure 5 It is a cross-sectional view of the liquid-cooled hub motor proposed by the utility model.

[0024] In the figure:

[0025] 1. Motor end cover;

[0026] 2. flow guide device; 21. flow guide cover; 22. skirt lining ring; 221. inclined skirt; 23. accommodating cavity; 24. flow guide hole; 25. reinforcing rib; 26. flow guide baffle; 27. arc plate; 28. connecting hole. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0032] This embodiment proposes a vehicle, which includes a wheel and a liquid-cooled wheel hub motor, and the liquid-cooled wheel hub motor is installed on the wheel. By installing the liquid-cooled wheel hub motor in the wheel and using liquid cooling technology, the heat generated by the liquid-cooled wheel hub motor is taken away by circulating coolant, which effectively solves the heat dissipation problem of the liquid-cooled wheel hub motor in a high temperature environment.

[0033] See also Figures 1 to 5 The liquid-cooled hub motor proposed in this embodiment includes a motor end cover 1, and also includes a guide device 2 connected to the motor end cover 1, the guide device 2 includes a guide cover 21 and a plurality of skirt bushings 22 protruding from the guide cover 21, the plurality of skirt bushings 22 are arranged on the side of the guide cover 21 close to the motor end cover 1, the skirt bushings 22 are fitted with the motor end cover 1 and form a accommodating cavity 23, the guide cover 21 is provided with a plurality of guide holes 24 corresponding to the plurality of skirt bushings 22, the guide holes 24 can connect the accommodating cavity 23 and the motor working chamber of the liquid-cooled hub motor, and the accommodating cavity 23 can accommodate coolant.

[0034] When the liquid-cooled hub motor is in a stationary state, the coolant inside the hub motor is concentrated at the bottom of the motor, and only the stator assembly and other parts at the bottom of the motor are cooled; due to the setting of the guide hole 24, coolant is distributed on both sides of the guide device 2. When the liquid-cooled hub motor starts to rotate, the coolant in the accommodating chamber 23 can be brought to the top of the liquid-cooled hub motor as the accommodating chamber 23 rotates. When a certain height is reached, the coolant will flow out of the accommodating chamber 23 through the guide hole 24 and spray into the motor working room, so that the stator assembly and other parts of the liquid-cooled hub motor can be fully cooled. The setting of the guide device 2 optimizes the flow path of the coolant inside the liquid-cooled hub motor, increases the cooling area of ​​the liquid-cooled hub motor by the coolant, improves the heat exchange efficiency between the coolant and the liquid-cooled hub motor, and transfers the heat to the motor end cover 1 and other components, so as to better dissipate the heat generated by the liquid-cooled hub motor, improve the cooling effect of the liquid-cooled hub motor, and thus improve the stability and reliability of the liquid-cooled hub motor.

[0035] See also Figure 5 The setting of the guide hole 24 can realize the entry and discharge of the coolant and complete the exchange of the coolant flow.

[0036] Furthermore, the liquid-cooled hub motor also includes a Hall signal board and a three-phase power interface. In order to ensure the installation space of the guide device 2, the Hall signal board and the three-phase power interface are both arranged on the side of the liquid-cooled hub motor away from the guide device 2 to improve the compactness and rationality of the overall structure of the liquid-cooled hub motor.

[0037] Optionally, the flow guide device 2 may be arranged on one side of the stator assembly of the liquid-cooled hub motor. As an alternative, two flow guide devices 2 are arranged, and the two flow guide devices 2 are arranged on both sides of the stator assembly.

[0038] Specifically, the size and shape of the guide hole 24 are designed according to the heat dissipation requirements of the liquid-cooled hub motor, which will not be elaborated here.

[0039] See also Figure 1 and Figure 2Preferably, a plurality of skirt linings 22 are arranged rotationally symmetrically along the axis direction of the guide cover 21. Such an arrangement can ensure that the coolant is evenly sprayed on parts such as the stator assembly, thereby improving the cooling effect of the liquid-cooled hub motor.

[0040] See also Figure 2 and Figure 5 The skirt liner 22 includes a sloped skirt 221 connected to the hole wall of the guide hole 24. The sloped skirt 221 is arranged on the side of the guide cover 21 close to the axial direction, and the outer diameter of the sloped skirt 221 gradually decreases in the direction close to the guide cover 21. When the liquid-cooled hub motor rotates, the accommodating cavity 23 and the coolant in the accommodating cavity 23 are driven to rotate. When reaching a certain height, the coolant in the accommodating cavity 23 will flow out obliquely downward along the sloped skirt 221 and spray on the stator assembly and other parts of the motor working room in a radiating surface, thereby improving the cooling effect of the liquid-cooled hub motor; in this way, the spraying height of the coolant can exceed 90% of the total height of the stator assembly of the liquid-cooled hub motor, thereby increasing the cooling area.

[0041] See also Figure 2 The flow guide device 2 further includes a reinforcing rib 25, which is disposed on the outer peripheral edge of the flow guide cover 21 near the motor end cover 1. The provision of the reinforcing rib 25 increases the strength and rigidity of the flow guide cover 21 without increasing the thickness of the flow guide cover 21, thereby preventing the flow guide cover 21 from deforming, saving material consumption, reducing weight, reducing costs, and increasing the service life of the flow guide device 2.

[0042] See also Figure 3 and Figure 4 The flow guide device 2 also includes a plurality of flow guide baffles 26 disposed on the side of the flow guide cover 21 away from the motor end cover 1. The plurality of flow guide baffles 26 are disposed one by one corresponding to the plurality of flow guide holes 24. The flow guide baffles 26 are used to guide the coolant to flow into the accommodating cavity 23 through the flow guide holes 24. The arrangement of the flow guide baffles 26 can quickly guide the coolant at the bottom of the liquid-cooled hub motor into the accommodating cavity 23 to ensure that the accommodating cavity 23 contains sufficient coolant, thereby improving the cooling efficiency of the liquid-cooled hub motor. Specifically, the cross section of the flow guide baffle 26 is L-shaped.

[0043] Further, see Figure 3 and Figure 4 The flow guide device 2 further includes a plurality of arc plates 27, which are arranged at one end of the flow guide cover 21 away from the motor end cover 1, and are connected to the plurality of flow guide baffles 26 in a one-to-one correspondence. The arc plates 27 are used to guide the coolant to spray to the center of the motor working room. When the liquid-cooled hub motor rotates counterclockwise, under the action of the arc plates 27, the coolant in the motor working room can flow and spray to the center of the motor working room, thereby improving the cooling speed of the motor working room.

[0044] Specifically, see Figures 1 to 5 The liquid-cooled hub motor further includes a connector, and the air guide cover 21 is provided with a plurality of connecting holes 28, through which the connector passes and is connected to the motor end cover 1. The arrangement of the connector and the connecting holes 28 enables the air guide cover 21 to be fixedly mounted on the motor end cover 1. Preferably, the connector is a bolt, through which the bolt passes and is threadedly connected to the motor end cover 1 through the connecting holes 28 of the air guide cover 21, thereby enabling the air guide cover 21 and the motor end cover 1 to be detachably connected.

[0045] Preferably, the flow guide device 2 is made of plastic material. The flow guide device 2 made of plastic is light in weight and has a small moment of inertia, which has little effect on the rotation of the liquid-cooled hub motor, thereby achieving lightweight of the flow guide device 2. Of course, the flow guide device 2 can also be made of metal material, which will not be described in detail here.

[0046] Optionally, the flow guide device 2 is integrally formed. The forming process of the flow guide device 2 can effectively reduce the number of parts, and the forming process has high production efficiency, simple operation and low production cost. The integrally formed flow guide device 2 has better quality and better overall structural stability.

[0047] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Liquid-cooled hub motor, including a motor end cover (1), It is characterized in that The liquid-cooled hub motor further comprises a flow guide device (2) connected to the motor end cover (1), the flow guide device (2) comprising a flow guide cover (21) and a plurality of skirt linings (22) protruding from the flow guide cover (21), the plurality of skirt linings (22) being arranged on a side of the flow guide cover (21) close to the motor end cover (1), the skirt linings (22) being fitted with the motor end cover (1) and forming a receiving cavity (23), the flow guide cover (21) being provided with a plurality of flow guide holes (24) corresponding one-to-one to the plurality of skirt linings (22), the flow guide holes (24) being able to connect the receiving cavity (23) and the motor working chamber of the liquid-cooled hub motor, and the receiving cavity (23) being able to receive cooling liquid.

2. The liquid-cooled hub motor according to claim 1, It is characterized in that The plurality of skirt lining rings (22) are rotationally symmetrically arranged along the axial direction of the deflector cover (21).

3. The liquid-cooled hub motor according to claim 1, It is characterized in that The skirt lining (22) comprises a bevel skirt (221) connected to the hole wall of the guide hole (24); the bevel skirt (221) is arranged on one side of the guide cover (21) close to the axial direction; and the outer diameter of the bevel skirt (221) gradually decreases in a direction close to the guide cover (21).

4. The liquid-cooled hub motor according to claim 1, It is characterized in that The flow guide device (2) further comprises a reinforcing rib (25), wherein the reinforcing rib (25) is arranged on an outer peripheral edge of the flow guide cover (21) close to the motor end cover (1).

5. The liquid-cooled hub motor according to claim 1, It is characterized in that The flow guide device (2) further comprises a plurality of flow guide baffles (26) arranged on a side of the flow guide cover (21) away from the motor end cover (1), the plurality of flow guide baffles (26) being arranged in a one-to-one correspondence with the plurality of flow guide holes (24), and the flow guide baffles (26) being used to guide the coolant to flow into the accommodating cavity (23) through the flow guide holes (24).

6. The liquid-cooled hub motor according to claim 5, It is characterized in that The flow guide device (2) further comprises a plurality of arc-shaped plates (27), wherein the plurality of arc-shaped plates (27) are arranged at one end of the flow guide cover (21) away from the motor end cover (1), and the plurality of arc-shaped plates (27) are connected to the plurality of flow guide baffles (26) in a one-to-one correspondence, and the arc-shaped plates (27) are used to guide the coolant to be sprayed to the center of the motor working room.

7. The liquid-cooled hub motor according to any one of claims 1 to 6, It is characterized in that The liquid-cooled hub motor also includes a connecting piece, the guide cover (21) is provided with a plurality of connecting holes (28), and the connecting piece passes through the connecting holes (28) and is connected to the motor end cover (1).

8. The liquid-cooled hub motor according to any one of claims 1 to 6, It is characterized in that The guide cover (21) is made of plastic material.

9. The liquid-cooled hub motor according to any one of claims 1 to 6, It is characterized in that The flow guide device (2) is integrally formed.

10. Vehicles, It is characterized in that The vehicle comprises a wheel and a liquid-cooled hub motor according to any one of claims 1 to 9, wherein the liquid-cooled hub motor is mounted on the wheel.

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