Motor

Abstract

The utility model discloses a motor comprising a metal housing cover, a plastic housing, a bearing, a heat conduction sleeve and a first sealing member. The first end of the plastic shell is in sealed connection with the metal shell cover, the metal shell cover and the plastic shell are enclosed to form a stator placement cavity, the second end of the plastic shell is recessed inwards to form a rotor placement cavity, and the plastic shell is provided with a heat conduction port for communicating the stator placement cavity with the rotor placement cavity; an inner ring of the bearing is suitable for being connected with a rotating shaft of the rotor; the heat conduction sleeve is connected between the outer ring of the bearing and the plastic shell; the first sealing piece is connected to the heat conduction sleeve and the plastic shell in a sealed mode, and the plastic shell, the first sealing piece, the heat conduction sleeve and the metal shell cover define a heat dissipation cavity; the motor adapts to complex working conditions through the plastic shell, the service life of the motor is prolonged, the metal shell cover is combined to guarantee the heat dissipation effect, and the motor which has a certain service life, adapts to various working conditions and is good in heat dissipation effect is obtained.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor. Background Technology

[0002] An electric motor typically consists of a stator, a rotor, and a metal housing. The metal housing provides high-strength support and helps dissipate heat from the stator and rotor. However, when the motor is used in harsh environments (high humidity, high dust, corrosive conditions), the metal housing is prone to corrosion, which can affect the motor's lifespan.

[0003] To address the above issues, related technologies have proposed using plastic housings as a technical solution. To improve the heat dissipation of the motor, a heat-conducting component is installed on the rotor's mounting bearing to transfer heat to the surface of the plastic housing. However, plastic housings still suffer from poor heat dissipation. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a motor capable of transferring heat from the internal bearings to the metal housing cover via a heat-conducting sleeve, thereby improving the motor's heat dissipation effect when using a plastic housing.

[0005] This utility model embodiment provides a motor, including:

[0006] Metal casing cover;

[0007] A plastic housing, the first end of which is sealed to a metal housing cover, the metal housing cover and the plastic housing together form a stator placement cavity, the second end of which is recessed to form a rotor placement cavity, and the plastic housing has a heat-conducting port that connects the stator placement cavity and the rotor placement cavity;

[0008] A bearing, the inner ring of which is adapted to be connected to the shaft of the rotor;

[0009] A heat-conducting sleeve is connected between the outer ring of the bearing and the plastic housing;

[0010] The first sealing element is sealed to the heat-conducting sleeve and the plastic shell. The plastic shell, the first sealing element, the heat-conducting sleeve and the metal shell cover form a heat dissipation cavity.

[0011] According to some embodiments of the present invention, the heat-conducting sleeve is provided with a columnar protrusion, the protrusion extending along the bearing toward the metal housing cover;

[0012] The first sealing element is a sealing ring, which is sleeved on the outer periphery of the protrusion.

[0013] According to some embodiments of the present invention, the protrusion abuts against the metal housing cover.

[0014] According to some embodiments of the present invention, the motor further includes a heat-conducting layer, which abuts against the metal housing cover and the protrusion.

[0015] According to some embodiments of the present invention, the heat-conducting sleeve is further provided with a rotating shaft placement cavity, which is coaxially arranged with the protrusion.

[0016] According to some embodiments of the present invention, the heat-conducting sleeve is further provided with a horizontal portion, the horizontal portion being parallel to the side surface of the bearing, and the distance between the inner surface of the horizontal portion and the side surface of the bearing being the same as the distance between the inner surface of the protrusion and the outer surface of the rotating shaft.

[0017] According to some embodiments of this utility model, the wall thickness of the horizontal portion and the wall thickness of the protrusion are the same.

[0018] According to some embodiments of this utility model, the metal housing cover is an aluminum cover.

[0019] According to some embodiments of this utility model, the heat-conducting sleeve is integrally formed with the plastic shell.

[0020] According to some embodiments of the present invention, the metal shell cover is provided with a plurality of fins that protrude outward along the axis of rotation.

[0021] The present invention has at least the following beneficial effects: By providing a heat-conducting port on the plastic shell to connect the rotor placement cavity and the stator placement cavity, the heat of the bearing in the rotor placement cavity can be directly transferred to the heat dissipation cavity in the stator placement cavity through the heat-conducting sleeve, and then dissipated by the metal shell cover. The heat transfer process does not need to pass through the plastic shell, which greatly improves the heat dissipation efficiency. Furthermore, by providing a first sealing element to seal the heat-conducting sleeve and the plastic shell, the stator placement cavity and the rotor placement cavity are prevented from connecting during motor operation, effectively protecting the components in the stator placement cavity. In addition, the plastic shell allows the motor to adapt to complex working conditions and improve its service life, while the metal shell cover ensures heat dissipation and reduces service life. The use of a replaceable metal shell cover ensures the recycling of other motor components, thereby balancing the relationship between motor service life, motor adaptability to various working conditions, and motor heat dissipation, to obtain a motor with a certain service life, adaptability to various working conditions, and good heat dissipation.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a cross-sectional view of the motor according to an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0026] Figure label:

[0027] 100. Metal casing cover; 110. Fins;

[0028] 200. Plastic housing; 210. Stator placement cavity; 220. Rotor placement cavity;

[0029] 300. Bearings;

[0030] 400. Heat-conducting sleeve; 410. Protrusion; 420. Rotary shaft placement cavity; 430. Horizontal part;

[0031] 500. First sealing element;

[0032] 600. Heat dissipation cavity;

[0033] 700, pivot. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first," "second," etc., are used in the description, they are only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, the terms "setting", "installation", "connection", etc. should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in combination with the specific content of the technical solution.

[0038] Please refer to Figure 1 and Figure 2 As shown, this utility model embodiment provides an electric motor, including a metal housing cover 100, a plastic housing 200, a bearing 300, a heat-conducting sleeve 400, and a first sealing member 500; the first end of the plastic housing 200 is sealed to the metal housing cover 100, the metal housing cover 100 and the plastic housing 200 enclose to form a stator placement cavity 210, the second end of the plastic housing 200 is recessed to form a rotor placement cavity 220, and the plastic housing 200 has a heat-conducting port communicating with the stator placement cavity 210 and the rotor placement cavity 220; the bearing 300, the inner ring of the bearing 300 is adapted to be connected to the rotor shaft 700; the heat-conducting sleeve 400 is connected between the outer ring of the bearing 300 and the plastic housing 200; the first sealing member 500 is sealed to the heat-conducting sleeve 400 and the plastic housing 200, and the plastic housing 200, the first sealing member 500, the heat-conducting sleeve 400 and the metal housing cover 100 enclose to form a heat dissipation cavity 600.

[0039] According to the embodiment of the present invention, the rotor shaft 700 is fixed to the inner ring of the bearing 300. The stator drives the rotor to rotate. The rotor shaft 700 generates heat while driving the inner ring of the bearing 300 to rotate. Most of the heat is transferred from the inner ring of the bearing 300 to the outer ring of the bearing 300 and then to the heat dissipation cavity 600 through the heat-conducting sleeve 400. Finally, it is dissipated to the outside through the metal housing cover 100.

[0040] It should be noted that the relevant technology proposes a solution using a plastic shell. To ensure the sealing effect, a closed plastic shell (without heat conduction ports) is used, and heat conduction components are set on the bearing to transfer heat to the surface of the plastic shell. However, the heat dissipation process still needs to pass through the plastic shell, and the problem of poor heat dissipation effect always exists.

[0041] According to the embodiment of the present invention, the motor has a heat-conducting port on the plastic housing 200 connecting the rotor placement cavity 220 and the stator placement cavity 210. This allows the heat from the bearing 300 in the rotor placement cavity 220 to be directly transferred through the heat-conducting sleeve 400 to the heat dissipation cavity 600 in the stator placement cavity 210, and then dissipated by the metal housing cover 100. The heat transfer process does not need to pass through the plastic housing 200, greatly improving the heat dissipation efficiency. Furthermore, by setting a first sealing element 500 to seal the heat-conducting sleeve 400 and the plastic housing 200, the stator placement cavity 210 and the rotor placement cavity 220 are prevented from connecting during motor operation, effectively protecting the components in the stator placement cavity 210. The plastic housing 200 also allows the motor to adapt to complex working conditions and improve its service life. Combined with the metal housing cover 100, the heat dissipation effect is ensured and the service life is reduced. The use of a replaceable metal housing cover 100 ensures the recycling of other motor components, thus balancing the relationship between motor service life, motor adaptability to various working conditions, and motor heat dissipation, to obtain a motor with a certain service life, adaptability to various working conditions, and good heat dissipation effect.

[0042] In some embodiments, combined with Figure 1 and Figure 2 As shown, the heat-conducting sleeve 400 has a columnar protrusion 410, which extends along the bearing 300 toward the metal housing cover 100; the first sealing element 500 is a sealing ring, which is sleeved on the outer periphery of the protrusion 410. In this embodiment, the protrusion 410 brings the heat-conducting sleeve 400 closer to the metal housing cover 100, improving the heat transfer effect. Furthermore, the columnar protrusion 410 is compatible with the annular first sealing element 500 and can be directly inserted along the axial direction of the protrusion 410, making installation convenient.

[0043] In some embodiments, the protrusion 410 abuts against the metal housing cover 100, thereby improving heat transfer through direct contact.

[0044] In some embodiments, the motor further includes a heat-conducting layer (not shown in the figure), which abuts against the metal housing cover 100 and the protrusion 410. The metal housing cover 100 and the protrusion 410 appear to be flat, but in reality, they have microscopic irregularities of 10~100μm. The air in the irregularities forms a heat insulation layer that affects heat dissipation. By filling the irregularities with the heat-conducting layer, the air is squeezed out, and an efficient heat transfer path is established.

[0045] In this embodiment, the thermally conductive layer can be made of thermally conductive silicone, thermally conductive paste, etc.

[0046] In some embodiments, combined with Figure 1 and Figure 2As shown, the heat-conducting sleeve 400 is also provided with a rotating shaft placement cavity 420, which is coaxially arranged with the protrusion 410. The rotating shaft 700 placed in the rotating shaft placement cavity 420 is used to balance the rotation of the rotating shaft 700 at the output end of the other side of the bearing 300, ensuring the dynamic balance of the rotating shaft 700 as a whole on the bearing 300.

[0047] In some embodiments, combined with Figure 1 and Figure 2 As shown, the heat-conducting sleeve 400 is also provided with a horizontal part 430, which is parallel to the side of the bearing 300, and the distance between the inner surface of the horizontal part 430 and the side of the bearing 300 is the same as the distance between the inner surface of the protrusion 410 and the outer surface of the rotating shaft 700.

[0048] In this embodiment, the horizontal part 430 ensures that the height of the gap between the heat-conducting sleeve 400, the bearing 300 and the rotating shaft 700 is always similar, making the heat dissipation of the bearing 300 more uniform and avoiding the problem of heat concentration caused by excessive local gaps.

[0049] In some embodiments, combined with Figure 1 and Figure 2 As shown, the wall thickness of the horizontal portion 430 is the same as that of the protruding portion 410. This avoids excessive wall thickness difference, facilitating the die casting or injection molding of the heat-conducting sleeve 400; and the same wall thickness ensures similar heat dissipation effect, avoiding local heat concentration.

[0050] In some embodiments, the metal housing cover 100 is made of aluminum. An oxide layer can naturally form on the aluminum cover in the air, improving its corrosion resistance and extending its service life. In other embodiments, the metal housing cover 100 may also be made of materials such as copper or stainless steel.

[0051] In some embodiments, combined with Figure 1 and Figure 2 As shown, the heat-conducting sleeve 400 and the plastic housing 200 are integrally molded. The plastic housing 200 can be integrally molded onto the heat-conducting sleeve 400 by injection molding, eliminating the need for installation steps of the heat-conducting sleeve 400 and effectively preventing the vibration generated during the high-speed operation of the rotating shaft 700 from affecting the sealing effect of the heat-conducting sleeve 400 and the plastic housing 200.

[0052] In some embodiments, combined with Figure 2 As shown, the metal housing cover 100 is provided with a plurality of fins 110 protruding outward along the axis of rotation 700. The fins 110 increase the contact area between the metal housing cover 100 and the outside air to improve the heat dissipation effect.

[0053] In this embodiment, multiple annular fins 110 can be provided around the axis of the bearing 300 to improve the heat dissipation effect on the metal housing cover 100 at the position corresponding to the bearing 300; in other embodiments, an array of square fins 110 can also be provided.

[0054] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An electric motor, characterized in that, include: Metal casing cover (100); A plastic housing (200) has a first end sealed to a metal housing cover (100), the metal housing cover (100) and the plastic housing (200) enclose each other to form a stator placement cavity (210), the second end of the plastic housing (200) is recessed to form a rotor placement cavity (220), and the plastic housing (200) has a heat-conducting port that connects the stator placement cavity (210) and the rotor placement cavity (220). A bearing (300), the inner ring of which is adapted to be connected to the shaft (700) of the rotor; A heat-conducting sleeve (400) is connected between the outer ring of the bearing (300) and the plastic housing (200); The first sealing element (500) is sealed to the heat-conducting sleeve (400) and the plastic shell (200). The plastic shell (200), the first sealing element (500), the heat-conducting sleeve (400) and the metal shell cover (100) enclose to form a heat dissipation cavity (600).

2. The motor according to claim 1, characterized in that, The heat-conducting sleeve (400) is provided with a columnar protrusion (410), which extends along the bearing (300) toward the metal housing cover (100); The first sealing element (500) is a sealing ring, which is sleeved on the outer periphery of the protrusion (410).

3. The motor according to claim 2, characterized in that, The protrusion (410) abuts against the metal housing cover (100).

4. The motor according to claim 2, characterized in that, The motor also includes a heat-conducting layer that abuts against the metal housing cover (100) and the protrusion (410).

5. The motor according to claim 2, characterized in that, The heat-conducting sleeve (400) is also provided with a rotating shaft placement cavity (420), which is coaxially arranged with the protrusion (410).

6. The motor according to claim 5, characterized in that, The heat-conducting sleeve (400) is also provided with a horizontal part (430), which is parallel to the side of the bearing (300), and the distance between the inner surface of the horizontal part (430) and the side of the bearing (300) is the same as the distance between the inner surface of the protrusion (410) and the outer surface of the rotating shaft (700).

7. The motor according to claim 6, characterized in that, The wall thickness of the horizontal portion (430) is the same as the wall thickness of the protruding portion (410).

8. The motor according to any one of claims 1 to 7, characterized in that, The metal housing cover (100) is an aluminum cover.

9. The motor according to any one of claims 1 to 7, characterized in that, The heat-conducting sleeve (400) is integrally formed with the plastic shell (200).

10. The motor according to any one of claims 1 to 7, characterized in that, The metal housing cover (100) is provided with a plurality of fins (110) that protrude outward along the axis of rotation (700).

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