Electric tricycle motor shell facilitating heat dissipation

Abstract

The utility model relates to motor casing technical field, concretely relates to a kind of electric tricycle motor casing convenient to radiate heat, including shell body, the surface of shell body is provided with passive heat dissipation mechanism, passive heat dissipation mechanism includes the spiral thread flow guide groove being opened in the surface of shell body, the pitch of spiral thread flow guide groove is reduced once from the air inlet end close to to the side far from air inlet end, the surface of spiral thread flow guide groove is fixedly connected with spiral convex strip, the surface of spiral convex strip is provided with several groups of micro recess, the bottom end of spiral convex strip is fixedly connected with heat pipe and heat pipe is fixedly connected with shell body, the inner side wall of shell body is fixedly connected with several groups of first radiating fin array.The utility model is through the cooperation of shell body and passive heat dissipation mechanism, spiral thread flow guide groove uses taper pitch structure, makes airflow accelerate and enhance turbulence intensity in the course of travel, and micro recess opened on spiral convex strip surface further destroys boundary layer, to improve heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor housing technology, specifically to a motor housing for an electric tricycle that facilitates heat dissipation. Background Technology

[0002] Currently, electric tricycle motors generally employ a closed casing combined with an axial straight-fin heat dissipation structure, relying on natural airflow for passive cooling during vehicle movement. While this design is structurally simple, its actual heat dissipation efficiency is limited by insufficient airflow organization under low-speed, high-torque conditions: a laminar boundary layer easily forms on the surface of the straight fins, resulting in a heat exchange area utilization rate of less than 40%; simultaneously, uneven temperature distribution on the casing surface leads to localized temperature rises exceeding 80°C in the corresponding winding areas, significantly increasing the risk of magnet demagnetization. The industry has attempted to improve heat dissipation by increasing fin density or using external fans; however, the former significantly increases weight and induces vibration fatigue, while the latter introduces additional energy consumption and reduces system reliability.

[0003] Traditional heat dissipation solutions struggle to balance efficiency and environmental adaptability: while a single spiral channel can enhance airflow turbulence, it contributes little to static heat dissipation; and if segmented heat dissipation fins are directly fixed to the outer shell surface, they will cause spatial interference with the channel structure, hindering airflow continuity and weakening turbulence intensity.

[0004] Therefore, it is necessary to invent a heat-dissipating housing for the motor of an electric tricycle to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a heat dissipation-friendly electric tricycle motor housing. By combining the housing body with a passive heat dissipation mechanism, this invention addresses the problems in the prior art where a single spiral guide channel can enhance airflow disturbance but contributes little to static heat dissipation; and where segmented heat dissipation fins, if directly fixed to the housing surface, will cause spatial interference with the guide channel structure, hindering airflow continuity and weakening turbulence intensity.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electric tricycle motor housing for easy heat dissipation, comprising a housing body, wherein a passive heat dissipation mechanism is provided on the surface of the housing body, the passive heat dissipation mechanism including a spiral-patterned guide groove formed on the surface of the housing body, wherein the pitch of the spiral-patterned guide groove decreases sequentially from the air inlet end to the side away from the air inlet end, a spiral protrusion is fixedly connected to the surface of the spiral-patterned guide groove, and a plurality of micro-grooves are formed on the surface of the spiral protrusion, a heat-conducting pipe is fixedly connected to the bottom end of the spiral protrusion and the heat-conducting pipe is fixedly connected to the housing body, a plurality of first heat dissipation fin arrays are fixedly connected to the inner sidewall of the housing body, and a plurality of second heat dissipation fin arrays are fixedly connected to the inner sidewall of the housing body, wherein the density of the second heat dissipation fin array is higher than that of the first heat dissipation fin array, and the local turbulence is formed by the cooperation of the spiral protrusion and micro-grooves and other parts, thereby disrupting the boundary layer and improving the heat exchange efficiency.

[0007] Preferably, a connecting part is fixedly connected to the end of the outer shell body away from the air inlet end, and an installation groove is provided inside the connecting part, through which subsequent parts are installed.

[0008] Preferably, a motor stator is provided inside the outer casing, and a mounting ring is fixedly connected to one end of the motor stator near the connecting part, thereby enabling the installation of the motor stator.

[0009] Preferably, the inner wall of the mounting groove is engaged with the mounting ring, and a heat-conducting block is provided on the inner side of the mounting ring. The heat-conducting block is fixedly connected to the motor stator and conducts heat through the heat-conducting block.

[0010] Preferably, a thermally conductive silicone gasket is fixedly connected to the inner sidewall of the connecting part, and the interior of the thermally conductive silicone gasket is filled with thermally conductive metal particles. The thermally conductive silicone gasket and the thermally conductive block are interlocked, and the cooperation between the thermally conductive blocks reduces the thermal conduction distance between the motor stator and the second heat dissipation fin array.

[0011] Preferably, a fixing bolt is threaded to one end of the heat-conducting block near the connecting part. The fixing bolt passes through one side of the connecting part and is threaded to the connecting part, thereby realizing the installation of the motor stator and the connecting part through the fixing bolt.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0013] Through the cooperation of the outer shell and the passive heat dissipation mechanism, the spiral guide groove adopts a gradually narrowing pitch structure, which accelerates the airflow and enhances the turbulence intensity during its movement. The micro-grooves on the surface of the spiral convex strip further disrupt the boundary layer and form local vortices, thereby improving heat exchange efficiency. At the same time, the dual-density heat dissipation fin array (the first heat dissipation fin array and the second heat dissipation fin array) is laid out according to the differentiated distribution of the motor's heat load. The high-density second heat dissipation fin array accurately covers the high-temperature area of ​​the stator. Together with the heat pipe and heat conduction block, it constructs an axial-radial dual-channel heat conduction network, which quickly conducts the core heat to the heat dissipation surface. In addition, the metal particles filled in the thermally conductive silicone gasket effectively reduce the interface thermal resistance. The snap-fit ​​structure of the mounting ring and the connection part takes into account both the ease of assembly and the stability under vibration conditions. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the spiral convex strip structure of this utility model;

[0019] Figure 5 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Outer shell; 2. Passive heat dissipation mechanism; 201. Spiral groove; 202. Spiral ridge; 203. Miniature groove; 204. Heat pipe; 205. First heat dissipation fin array; 206. Second heat dissipation fin array; 3. Motor stator; 4. Connecting part; 5. Fixing bolt; 6. Thermally conductive silicone gasket; 7. Mounting ring; 8. Mounting groove; 9. Thermally conductive block. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model provides, for example Figure 1-5 The diagram shows a heat-dissipating electric tricycle motor housing, comprising a housing body 1. A passive heat dissipation mechanism 2 is provided on the surface of the housing body 1. The passive heat dissipation mechanism 2 includes a spiral-patterned guide groove 201 formed on the surface of the housing body 1. The pitch of the spiral-patterned guide groove 201 decreases sequentially from the air inlet end to the side furthest from the air inlet end. A spiral protrusion 202 is fixedly connected to the surface of the spiral-patterned guide groove 201. Several sets of micro-grooves 203 are formed on the surface of the spiral protrusion 202. A heat-conducting pipe 204 is fixedly connected to the bottom end of the spiral protrusion 202 and is fixedly connected to the housing body 1. Several sets of first heat dissipation fins are fixedly connected to the inner sidewall of the housing body 1. The inner wall of the outer shell 1 is fixedly connected to several sets of second heat dissipation fin arrays 206. The density of the second heat dissipation fin array 206 is higher than that of the first heat dissipation fin array 205. The local turbulence is formed by the cooperation of spiral protrusions 202 and micro grooves 203, etc., which destroys the boundary layer and improves the heat exchange efficiency. The end of the outer shell 1 away from the air inlet is fixedly connected to a connecting part 4. The connecting part 4 has an installation groove 8 inside. Subsequent parts are installed through the installation groove 8 and the connecting part 4. The inner wall of the outer shell 1 is provided with a motor stator 3. The end of the motor stator 3 near the connecting part 4 is fixedly connected to an installation ring 7. The installation ring 7 is used to install the motor stator 3.

[0024] Refer to the instruction manual appendix Figure 1-5The inner wall of the mounting groove 8 is engaged with the mounting ring 7. A heat-conducting block 9 is provided on the inner side of the mounting ring 7. The heat-conducting block 9 is fixedly connected to the motor stator 3 and conducts heat through the heat-conducting block 9. A heat-conducting silicone gasket 6 is fixedly connected to the inner wall of the connecting part 4, and the interior of the heat-conducting silicone gasket 6 is filled with heat-conducting metal particles. The heat-conducting silicone gasket 6 and the heat-conducting block 9 are engaged with each other. The cooperation between the heat-conducting blocks 9 reduces the heat conduction distance between the motor stator 3 and the second heat dissipation fin array 206. A fixing bolt 5 is threadedly connected to one end of the heat-conducting block 9 near the connecting part 4. The fixing bolt 5 passes through one side of the connecting part 4 and is threadedly connected to the connecting part 4. The motor stator 3 is installed with the connecting part 4 through the fixing bolt 5. Through the cooperation between the outer shell body 1 and the passive heat dissipation mechanism 2, the spiral guide groove The 201 adopts a gradually narrowing pitch structure, which accelerates the airflow and enhances the turbulence intensity during its movement. The micro-grooves 203 on the surface of the spiral ribs 202 further disrupt the boundary layer and form local vortices, thereby improving heat exchange efficiency. At the same time, the dual-density heat dissipation fin arrays, the first heat dissipation fin array 205 and the second heat dissipation fin array 206, are arranged differently for the distribution of motor heat load. The high-density second heat dissipation fin array 206 precisely covers the high-temperature area of ​​the stator. Together with the heat pipes 204 and the heat conduction blocks 9, they form an axial-radial dual-channel heat conduction network, which quickly conducts the core heat to the heat dissipation surface. In addition, the metal particles filled in the thermally conductive silicone gasket 6 effectively reduce the interface thermal resistance. The snap-fit ​​structure of the mounting ring 7 and the connecting part 4 takes into account both the ease of assembly and the stability under vibration conditions.

[0025] The working principle of this practical application is as follows:

[0026] Refer to the instruction manual appendix Figure 1-5 When the motor is running, the heat generated by the stator is conducted to the second heat dissipation fin array 206 through the heat conduction block 9. At the same time, some heat is transferred outward through the contact surface between the motor stator 3 and the housing body 1. The spiral guide groove 201 on the surface of the housing utilizes the natural airflow during vehicle movement. The airflow speed is gradually increased through the gradually decreasing pitch design. When the airflow passes through the spiral protrusion 202, it is disturbed by the micro groove 203 to generate high-frequency turbulence, which continuously strips the high-temperature air layer on the heat dissipation surface. The heat conduction pipe 204 directionally transfers the heat accumulated by the spiral protrusion 202 to the root of the fins, forming a cross heat dissipation airflow with the first heat dissipation fin array 205.

[0027] In a static state, the second heat dissipation fin array 206 dissipates heat through thermal radiation and natural convection, while the thermally conductive silicone gasket 6 ensures a low thermal resistance connection between the heat-conducting block 9 and the connecting part 4, preventing heat backflow. The entire system achieves efficient thermal management under both dynamic and static conditions through the synergistic effect of enhanced flow, optimized heat conduction, and zoned heat dissipation.

[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A heat-dissipating housing for an electric tricycle motor, comprising a housing body (1), characterized in that: The surface of the outer shell body (1) is provided with a passive heat dissipation mechanism (2). The passive heat dissipation mechanism (2) includes a spiral flow guide groove (201) opened on the surface of the outer shell body (1). The pitch of the spiral flow guide groove (201) decreases sequentially from the air inlet end to the side away from the air inlet end. A spiral protrusion (202) is fixedly connected to the surface of the spiral flow guide groove (201). Several sets of micro grooves (203) are opened on the surface of the spiral protrusion (202). A heat conduction pipe (204) is fixedly connected to the bottom end of the spiral protrusion (202) and the heat conduction pipe (204) is fixedly connected to the outer shell body (1). Several sets of first heat dissipation fin arrays (205) are fixedly connected to the inner sidewall of the outer shell body (1). Several sets of second heat dissipation fin arrays (206) are fixedly connected to the inner sidewall of the outer shell body (1). The density of the second heat dissipation fin array (206) is higher than that of the first heat dissipation fin array (205).

2. The heat-dissipating housing for an electric tricycle motor according to claim 1, characterized in that: The outer shell body (1) is fixedly connected to a connecting part (4) at one end away from the air inlet end, and an installation groove (8) is provided inside the connecting part (4).

3. The heat-dissipating housing for an electric tricycle motor according to claim 1, characterized in that: The motor stator (3) is provided inside the outer shell body (1), and an installation ring (7) is fixedly connected to one end of the motor stator (3) near the connecting part (4).

4. The heat-dissipating housing for an electric tricycle motor according to claim 2, characterized in that: The inner wall of the mounting groove (8) is engaged with the mounting ring (7), and a heat-conducting block (9) is provided on the inner side of the mounting ring (7). The heat-conducting block (9) is fixedly connected to the motor stator (3).

5. The heat-dissipating housing for an electric tricycle motor according to claim 2, characterized in that: The inner wall of the connecting part (4) is fixedly connected to a thermally conductive silicone gasket (6), and the interior of the thermally conductive silicone gasket (6) is filled with thermally conductive metal particles. The thermally conductive silicone gasket (6) and the thermally conductive block (9) are interlocked.

6. The heat-dissipating housing for an electric tricycle motor according to claim 4, characterized in that: The heat-conducting block (9) is threaded with a fixing bolt (5) at one end near the connecting part (4). The fixing bolt (5) passes through one side of the connecting part (4) and is threadedly connected to the connecting part (4).

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