An electric vehicle wheel hub motor shell with built-in heat dissipation guide grooves

Abstract

The utility model relates to hub motor technical field especially is an electric vehicle hub motor shell with built-in heat dissipation flow guide groove, including the casing, be provided with the flow guide groove structure on the casing, the flow guide groove structure includes the inner heat dissipation groove structure of being arranged in the inside of casing and the outer heat dissipation groove structure of being arranged in the outside of casing, the utility model discloses the structural design of built-in heat dissipation flow guide groove is optimized, has improved the heat dissipation efficiency of hub motor shell significantly, the volute type inner heat dissipation groove can make full use of the airflow produced by the rotor rotation, prolongs the flow path of airflow in the groove, cooperates the variable cross section design to accelerate airflow velocity, strengthens the contact area with stator winding, permanent magnet and other core heat source, effectively collects the internal heat of motor, the synergistic effect of heat conduction column and inner heat dissipation groove, outer heat dissipation groove has solved the problem that traditional shell heat conduction is slow, internal heat stockpiling, avoids the permanent magnet demagnetization, winding insulation ageing and other faults caused by local temperature rise too high.

Description

Technical Field

[0001] This utility model relates to the field of hub motor technology, specifically to a hub motor housing for electric vehicles with built-in heat dissipation channels. Background Technology

[0002] As the core drive component of electric vehicles, the in-wheel motor's integrated design simplifies the transmission chain and improves space utilization. When the in-wheel motor is working, core components such as the stator winding, permanent magnet, and bearings generate a lot of heat due to electromagnetic losses and mechanical friction. Moreover, its special position inside the wheel results in a poor heat dissipation environment. If the heat cannot be dissipated in time, it will cause the motor temperature to rise too high, which will lead to problems such as permanent magnet demagnetization, winding insulation aging, and bearing lubrication failure, seriously affecting the motor's efficiency, lifespan, and operational safety.

[0003] To address the heat dissipation problem, various heat dissipation solutions for hub motor housings have been proposed in the existing technology. These solutions include setting annular heat dissipation fins on the outer wall of the housing and opening straight or annular guide grooves on the inner wall of the housing. The airflow generated by the rotation of the motor rotor is used for internal air cooling. However, most of the existing guide grooves are straight or annular structures in one direction, with short airflow paths and limited contact area with the heat source. They cannot cover the core heat-generating areas such as the ends of the stator windings and the gaps between permanent magnet poles, resulting in heat concentration inside the motor and poor overall heat dissipation effect.

[0004] Therefore, an electric vehicle hub motor housing with built-in heat dissipation channels is needed to improve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an electric vehicle hub motor housing with built-in heat dissipation channels to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An electric vehicle hub motor housing with built-in heat dissipation channel includes a housing, on which a channel structure is provided. The channel structure includes an inner heat dissipation channel structure opened on the inner side of the housing and an outer heat dissipation channel structure opened on the outer side of the housing, and a heat-conducting element is provided between the inner heat dissipation channel structure and the outer heat dissipation channel structure.

[0007] As a preferred embodiment of this utility model, the internal heat dissipation groove structure is an internal heat dissipation groove opened on the inner side of the shell, and the internal heat dissipation groove is volute-shaped.

[0008] As a preferred embodiment of this utility model, the cross-sectional width of the inner heat dissipation groove decreases sequentially from the outside to the inside.

[0009] As a preferred embodiment of this utility model, the external heat dissipation groove structure includes a plurality of external heat dissipation grooves arranged in a circumferential array, and the bottom of each external heat dissipation groove is arc-shaped.

[0010] As a preferred embodiment of this utility model, the heat-conducting component includes a heat-conducting column that penetrates the shell. The heat-conducting column penetrates the outer heat dissipation groove and its bottom end is engaged with the inner heat dissipation groove to conduct heat inside the inner heat dissipation groove.

[0011] As a preferred embodiment of this utility model, a heat sink is fixedly connected to the end of the heat-conducting column, and the heat sink absorbs heat from the inside of the external heat dissipation groove and accelerates heat dissipation.

[0012] As a preferred embodiment of this utility model, the inner outer ring of the housing is provided with a convex ring, and the side of the housing is provided with a plurality of mounting holes at equal intervals.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention significantly improves the heat dissipation efficiency of the hub motor housing by optimizing the structural design of the built-in heat dissipation channel. The volute-shaped internal heat dissipation channel can make full use of the airflow generated by the rotor rotation, extend the airflow path in the channel, and accelerate the airflow velocity with the variable cross-section design, thereby increasing the contact area with core heat sources such as stator windings and permanent magnets, and effectively collecting heat inside the motor. The synergistic effect of the heat-conducting column with the internal and external heat dissipation channels solves the problems of slow heat conduction and internal heat accumulation in traditional housings, avoiding faults such as permanent magnet demagnetization and winding insulation aging caused by excessive local temperature rise. Attached Figure Description

[0014] Figure 1 This is a first-view perspective perspective view of the present invention; Figure 2 This is a second-view perspective perspective view of the present invention; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0015] In the diagram: 1. Housing; 2. Convex ring; 3. Inner heat dissipation groove; 4. Mounting hole; 5. Center hole; 6. Outer heat dissipation groove; 7. Heat conduction pillar; 8. Heat sink. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figure 1-3 This utility model provides a technical solution: For an example, please refer to... Figure 1 , 2 3. An electric vehicle hub motor housing with built-in heat dissipation channel includes a housing 1. A convex ring 2 is provided on the inner outer ring of the housing 1. A plurality of mounting holes 4 are equally spaced on the side of the housing 1. A channel structure is provided on the housing 1. The channel structure includes an inner heat dissipation channel structure opened on the inner side of the housing 1 and an outer heat dissipation channel structure opened on the outer side of the housing 1. A heat-conducting component is provided between the inner heat dissipation channel structure and the outer heat dissipation channel structure.

[0021] By integrating an inner heat dissipation groove structure, an outer heat dissipation groove structure, and heat-conducting components onto the housing 1, a three-stage heat dissipation path—internal conduction, external dissipation—is constructed, achieving efficient heat removal and dissipation from the motor's interior. Side mounting holes 4 are used for fixing to the hub or end cover, ensuring overall structural stability. The synergistic effect of the heat-conducting groove structure and the heat-conducting components solves the problems of low heat dissipation efficiency and poor heat isolation between the internal and external components in traditional housings. Please refer to Figure 1 , 2The internal heat dissipation groove structure is an internal heat dissipation groove 3 opened inside the shell 1, and the internal heat dissipation groove 3 is spiral-shaped. The cross-sectional width of the internal heat dissipation groove 3 decreases from the outside to the inside. The external heat dissipation groove structure includes several external heat dissipation grooves 6 arranged in a circular array, and the bottom of each external heat dissipation groove 6 is arc-shaped. The heat conduction component includes a heat conduction column 7 that penetrates the shell 1. The heat conduction column 7 penetrates the external heat dissipation groove 6 and its bottom end is engaged with the internal heat dissipation groove 3 to conduct heat inside the internal heat dissipation groove 3. A heat sink 8 is fixedly connected to the end of the heat conduction column 7. The heat sink 8 absorbs heat inside the external heat dissipation groove 6 and accelerates heat dissipation.

[0022] The inner heat dissipation groove 3 is a volute-shaped groove located inside the housing 1. Its core function is to collect the heat generated by the heat source inside the motor and guide the heat to the heat-conducting component through airflow. The volute-shaped structure matches the rotation direction of the motor rotor. When the rotor rotates at high speed, it drives the internal air to flow along the volute-shaped inner heat dissipation groove 3, prolonging the residence time of the airflow in the groove, thereby fully absorbing the heat from the outer periphery of the stator core and the winding ends. At the same time, the volute path can cover the entire inner area of ​​the housing 1, avoiding the defects of local heat concentration in traditional annular grooves. It achieves uniform heat dissipation, especially for radially distributed heat sources of the motor. The cross-sectional width of the inner heat dissipation groove 3 decreases from the outside to the inside. According to the Venturi effect in fluid mechanics, the airflow velocity increases in the narrow cross-sectional section, enhancing the convective heat transfer coefficient. At the same time, the narrow outlet section connects with the heat-conducting column 7, which can concentrate the heat carried by the high-speed airflow to the heat-conducting component, reducing the accumulation of heat in the groove.

[0023] The external heat dissipation groove structure consists of several external heat dissipation grooves 6 arranged in a circular array. The bottom of the groove is arc-shaped. Its main function is to increase the contact area between the outer wall of the shell 1 and the outside air, so as to quickly dissipate the heat transferred by the heat conduction component into the environment. The heat-conducting component includes a heat-conducting column 7 that penetrates the shell 1 and an end heat sink 8. It is a key heat transfer path connecting the inner heat sink 3 and the outer heat sink 6, realizing efficient heat transfer from the inner sink to the heat-conducting column and then to the outer sink. The heat-conducting column 7 is made of a high thermal conductivity material and is installed through the shell 1 along its thickness direction. Its bottom end is embedded in the bottom of the inner heat sink 3 and its top end extends into the outer heat sink 6. Through the thermal conductivity of metal, the heat collected in the inner heat sink 3 is quickly conducted to the outer heat sink 6, forming a heat transfer gradient driven by temperature difference. The heat sink 8 is a sheet-like structure fixed to the top of the heat-conducting column 7. Its function is to increase the contact area between the heat-conducting column 7 and the air inside the outer heat dissipation slot 6. When the vehicle is moving, the outside airflow flows through the outer heat dissipation slot 6 and fully exchanges heat with the heat sink 8, quickly carrying away the heat conducted by the heat-conducting column 7. Under stationary or low-speed conditions, the heat sink 8 can assist in heat dissipation through thermal radiation.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hub motor housing for an electric vehicle with built-in heat dissipation channels, comprising a housing (1), characterized in that: The housing (1) is provided with a flow channel structure, which includes an inner heat dissipation channel structure opened on the inner side of the housing (1) and an outer heat dissipation channel structure opened on the outer side of the housing (1), and a heat-conducting component is provided between the inner heat dissipation channel structure and the outer heat dissipation channel structure. The internal heat dissipation groove structure is an internal heat dissipation groove (3) opened on the inner side of the shell (1), and the internal heat dissipation groove (3) is spiral-shaped; The external heat dissipation structure includes a plurality of external heat dissipation slots (6) arranged in a circular array, and the bottom of each external heat dissipation slot (6) is arc-shaped.

2. The electric vehicle hub motor housing with built-in heat dissipation channel as described in claim 1, characterized in that: The cross-sectional width of the inner heat dissipation groove (3) decreases from the outside to the inside.

3. The electric vehicle hub motor housing with built-in heat dissipation channel as described in claim 2, characterized in that: The heat-conducting component includes a heat-conducting column (7) that penetrates the housing (1). The heat-conducting column (7) penetrates the outer heat dissipation groove (6) and its bottom end is connected to the inner heat dissipation groove (3) to conduct heat inside the inner heat dissipation groove (3).

4. The electric vehicle hub motor housing with built-in heat dissipation channel as described in claim 3, characterized in that: The end of the heat-conducting column (7) is fixedly connected to a heat sink (8), which absorbs heat from the inside of the heat sink (6) and accelerates heat dissipation.

5. The electric vehicle hub motor housing with built-in heat dissipation channel as described in claim 4, characterized in that: The inner outer ring of the housing (1) is provided with a protrusion (2), and the side of the housing (1) is provided with a number of mounting holes (4) at equal intervals.

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