Rotor dust cover and electric machine

Abstract

The utility model relates to motor technical field discloses rotor dust cover and motor, this rotor dust cover includes dust cover body, reinforcing rib and fixing part, dust cover body cover is located in rotor cup, can play the effect of closing to rotor cup along the axial direction of dust cover body, effectively prevents sand and dust from entering the inside of motor, reinforcing rib fixedly sets up in the inboard of dust cover body, can strengthen the structural strength of dust cover body, one end of reinforcing rib is provided with positioning slot, reinforcing rib can be lapped in rotor cup through positioning slot, to form the ventilation passage between dust cover body and rotor cup, to supply the heat dissipation of motor inside. The fixing part has first end and second end, the second end is inserted in the fixed hole of rotor cup, the first end is provided with connecting groove, the fixing part is clamped in the reinforcing rib through the connecting groove, along the length direction of reinforcing rib, the fixing part can slide relative to the reinforcing rib, to adjust the position of fixing part relative to dust cover body, strong universality, reduce the manufacturing cost.

Description

Technical Field

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

[0002] External rotor motors often employ an open-type rotor cup structure, utilizing the airflow generated during rotation to dissipate heat from the internal stator—a crucial design feature ensuring stable operation. However, when the motor is used in dusty environments, the rotor openings become the primary channel for dust intrusion. The high-speed rotating rotor carries dust particles through these openings into the tiny air gap between the stator and rotor. Prolonged dust accumulation not only increases the motor's operating resistance and reduces efficiency but can also cause it to stall, severely impacting its reliability and lifespan.

[0003] To address the aforementioned issues, existing technologies offer a solution involving adding a dust cover. While a fully enclosed dust cover can block sand and dust, it obstructs necessary airflow, leading to motor overheating. Furthermore, its mounting holes typically correspond one-to-one with the fixing holes of a specific rotor cup, lacking versatility. This means that different rotor cup specifications need to be designed and manufactured individually, resulting in high production costs and difficulty in meeting diverse application requirements.

[0004] Therefore, there is an urgent need for a rotor dust cover and motor to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a rotor dust cover and motor, which effectively prevents sand and dust from entering the motor, while also providing heat dissipation for the motor. Furthermore, it is adaptable to the hole positions of the fixing holes corresponding to different specifications of rotor cups, making it highly versatile.

[0006] To address the aforementioned problems in the existing technology, this utility model adopts the following technical solution:

[0007] Rotor dust cover, including:

[0008] A dust cover body, wherein the dust cover body is disposed on the rotor cup;

[0009] A reinforcing rib is fixedly installed on the inner side of the dust cover body. One end of the reinforcing rib is provided with a positioning groove. The reinforcing rib can overlap the rotor cup through the positioning groove so that an air exchange channel is formed between the dust cover body and the rotor cup. The air exchange channel is connected to the inside of the motor.

[0010] The fastener has a first end and a second end. The first end has a connecting groove, and the fastener is engaged with the reinforcing rib through the connecting groove. The fastener can slide relative to the reinforcing rib along the length direction of the reinforcing rib. The second end is inserted into the fixing hole of the rotor cup.

[0011] As an optional technical solution, the dust cover body has a central hole, which is configured to allow the motor shaft to pass through. A protrusion is provided on the inner side of the dust cover body. Along the circumferential direction of the dust cover body, the protrusion protrudes from the opening of the central hole, and the outer periphery of the protrusion is connected to the other end of the reinforcing rib.

[0012] As an optional technical solution, the protrusion and the reinforcing rib are integrally formed with the dust cover body.

[0013] As an optional technical solution, there are multiple reinforcing ribs, which are arranged radially at intervals along the circumferential direction of the protrusion.

[0014] As an optional technical solution, there are multiple fasteners, and each of the multiple fasteners is provided in a one-to-one correspondence with a multiple of the reinforcing ribs.

[0015] As an optional technical solution, the fixing member is welded to the fixing hole of the rotor cup.

[0016] As an optional technical solution, the outer side of the dust cover body has a recess, and there are multiple recesses, which are spaced apart along the circumference of the dust cover body.

[0017] As an optional technical solution, the cross-sectional shape of the pit is fan-shaped, triangular, or elliptical.

[0018] As an optional technical solution, the dust cover body, the reinforcing ribs, and the fasteners are all made of plastic.

[0019] This utility model also provides an electric motor, including a rotor cup and the aforementioned rotor dust cover, wherein the rotor dust cover is disposed on the rotor cup.

[0020] The rotor dust cover and motor provided by this utility model have at least the following beneficial effects:

[0021] The rotor dust cover includes a dust cover body, reinforcing ribs, and fasteners. The dust cover body covers the rotor cup along its axial direction, effectively sealing the rotor cup and preventing sand and dust from entering the motor's interior, thus improving the motor's service life and protection capabilities. The reinforcing ribs are fixedly installed on the inner side of the dust cover body, enhancing its structural strength. One end of the reinforcing rib has a positioning groove, allowing it to overlap the rotor cup and form a ventilation channel. This ventilation channel is connected to the motor's interior for heat dissipation. The fasteners have a first end and a second end. The second end inserts into a fixing hole in the rotor cup, while the first end has a connecting groove. The fasteners are engaged with the reinforcing rib through this groove. Along the length of the reinforcing rib, the fasteners can slide relative to it, adjusting their position to accommodate different rotor cup sizes and corresponding fixing hole positions. This design offers wide applicability, strong versatility, and reduced manufacturing costs.

[0022] The motor includes a rotor cup and a rotor dust cover, with the dust cover positioned on the rotor cup. Along the axial direction of the dust cover body, it covers the rotor cup and provides a sealing effect, effectively preventing sand and dust from entering the motor's interior. A positioning groove is provided at one end of the reinforcing rib, allowing it to overlap the rotor cup and create a ventilation channel between the dust cover body and the rotor cup. External air can enter the motor's interior through this ventilation channel along the circumference of the dust cover body, thus facilitating heat dissipation. Along the length of the reinforcing rib, the fixing component can slide relative to it for adjustment, accommodating the corresponding fixing holes of different sized rotor cups, ensuring high versatility. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the front structure of the rotor dust cover in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the back structure of the rotor dust cover in an embodiment of this utility model;

[0025] Figure 3 This is a side view of the rotor dust cover in an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Dust cover body; 11. Center hole;

[0028] 2. Reinforcing ribs; 21. Positioning grooves;

[0029] 3. Fastener; 31. First end; 32. Second end;

[0030] 4. Protrusion;

[0031] 5. Dents. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] 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.

[0036] like Figures 1 to 3As shown, this embodiment provides a rotor dust cover, which includes a dust cover body 1, a reinforcing rib 2, and a fixing member 3. The dust cover body 1 covers the rotor cup, and the reinforcing rib 2 is fixedly disposed on the inner side of the dust cover body 1. One end of the reinforcing rib 2 has a positioning groove 21, allowing it to overlap the rotor cup, thus forming a ventilation channel between the dust cover body 1 and the rotor cup. This ventilation channel is connected to the interior of the motor. The fixing member 3 has a first end 31 and a second end 32. The first end 31 has a connecting groove, through which the fixing member 3 is engaged with the reinforcing rib 2. The fixing member 3 can slide relative to the reinforcing rib 2 along its length. The second end 32 is inserted into a fixing hole in the rotor cup.

[0037] The dust cover body 1 has a circular cross-section that matches the size of the rotor cup, allowing it to completely cover the rotor cup. A reinforcing rib 2 protrudes from the inner side of the dust cover body 1, extending from its center to its outer edge to enhance its structural strength. A stepped positioning groove 21 is formed at the end of the reinforcing rib 2, with its contact surface overlapping the surface of the rotor cup, creating a ventilation channel between the dust cover body 1 and the rotor cup. This ventilation channel connects the motor's interior to the external air for heat dissipation.

[0038] The fixing member 3 is configured as a fixing post. The first end 31 of the fixing member 3 is snapped into the reinforcing rib 2 through a connecting groove, and the second end 32 of the fixing member 3 is fixedly inserted into the fixing hole of the rotor cup, so that the dust cover body 1 is fixed on the rotor cup. Depending on the position of the fixing hole of different rotor cups, the fixing member 3 can slide relative to the reinforcing rib 2 to adjust the position of the fixing member 3 relative to the dust cover body 1, so that the fixing member 3 corresponds to the fixing hole of the rotor cup, thereby allowing the dust cover body 1 to be installed on the rotor cup through the adjustment of the fixing member 3.

[0039] The rotor dust cover is fixedly installed on the surface of the rotor cup along the axial direction of the dust cover body 1. The dust cover body 1 can seal the rotor cup, effectively preventing sand and dust from entering the motor. This significantly improves the motor's service life and provides additional protection during long-term operation in windy and sandy areas. Furthermore, along the circumference of the dust cover body 1, external air can enter the motor through the ventilation channel, facilitating heat dissipation. More importantly, the fixing component 3 can be adjusted relative to the reinforcing rib 2 to accommodate the corresponding fixing holes of rotor cups of different sizes, offering wide applicability, strong versatility, and reduced manufacturing costs.

[0040] Furthermore, referring to Figures 1-3The dust cover body 1 has a central hole 11, which is configured to allow the motor shaft to pass through. A protrusion 4 is provided on the inner side of the dust cover body 1. Along the circumferential direction of the dust cover body 1, the protrusion 4 protrudes from the opening of the central hole 11, and the outer periphery of the protrusion 4 is connected to the other end of the reinforcing rib 2.

[0041] The motor shaft rotates through the central hole 11 of the dust cover body 1, and a sealing ring is provided between the shaft and the central hole 11 to effectively prevent sand and dust from entering the motor. The protrusion 4 and the reinforcing rib 2 are integrally formed with the dust cover body 1. The protrusion 4, reinforcing rib 2, and dust cover body 1 are integrally formed by casting or other methods. The protrusion 4 is located inside the dust cover body 1 at the opening of the central hole 11, guiding the shaft to accurately pass through the central hole 11. The protrusion 4 is connected to the end of the reinforcing rib 2, providing support for the protrusion 4 and enhancing its structural strength.

[0042] Furthermore, referring to Figures 1-3 There are multiple reinforcing ribs 2, which are arranged radially at intervals along the circumference of the protrusion 4.

[0043] Multiple reinforcing ribs 2 further enhance the structural strength of the dust cover body 1. Multiple fasteners 3 are provided, each corresponding to one of the reinforcing ribs 2. Preferably, there are eight reinforcing ribs 2. The number of fasteners 3 is determined by the number of mounting holes in the rotor cup. In this embodiment, there are four mounting holes in the rotor cup, therefore four fasteners 3 are provided. Along the circumference of the dust cover body 1, the four fasteners 3 are evenly and spaced apart on the corresponding reinforcing ribs 2. The dust cover body 1 is fixedly mounted to the rotor cup by the multiple fasteners 3.

[0044] Furthermore, referring to Figures 1-3 The fixing component 3 is welded to the fixing hole of the rotor cup. The fixing component 3 is melted and fixed in the mounting hole of the rotor cup by ultrasonic welding, so that the connection is firm and not easy to loosen.

[0045] Furthermore, referring to Figures 1-3 The outer side of the dust cover body 1 has a recess 5. There are multiple recesses 5, which are spaced apart along the circumference of the dust cover body 1.

[0046] The cross-sectional shape of the recess 5 is fan-shaped, triangular, or elliptical. In this embodiment, the cross-sectional shape of the recess 5 is fan-shaped, and multiple recesses 5 are spaced apart along the circumference of the dust cover body 1, presenting a patterned design. This design is lightweight and allows operators to easily access the dust cover body 1 and install the rotor cup through the recesses 5. It also has a good aesthetic appeal.

[0047] Furthermore, referring to Figures 1-3 The dust cover body 1, reinforcing rib 2, and fixing parts 3 are all made of plastic. The rotor dust cover is made of plastic, which is low-cost and its transparency allows operators to clearly observe the internal condition of the motor.

[0048] This embodiment also provides a motor, including a rotor cup and the rotor dust cover described above, with the dust cover disposed on the rotor cup. Along the axial direction of the dust cover body 1, the dust cover body 1 covers the rotor cup and provides a sealing effect, effectively preventing sand and dust from entering the motor's interior. One end of the reinforcing rib 2 has a positioning groove 21, allowing the reinforcing rib 2 to overlap with the rotor cup, forming a ventilation channel between the dust cover body 1 and the rotor cup. Along the circumference of the dust cover body 1, external air can enter the motor's interior through the ventilation channel, providing heat dissipation. Along the length of the reinforcing rib 2, the fixing member 3 can slide relative to the reinforcing rib 2 for adjustment, adapting to the corresponding fixing hole positions of rotor cups of different specifications, offering strong versatility.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotor dust cover, characterized in that, include: Dust cover body (1), the dust cover body (1) is placed on the rotor cup; A reinforcing rib (2) is fixedly disposed on the inner side of the dust cover body (1). A positioning groove (21) is provided at one end of the reinforcing rib (2). The reinforcing rib (2) can be connected to the rotor cup through the positioning groove (21) so that an air exchange channel is formed between the dust cover body (1) and the rotor cup. The air exchange channel is connected to the interior of the motor. The fastener (3) has a first end (31) and a second end (32). The first end (31) has a connecting groove. The fastener (3) is snapped into the reinforcing rib (2) through the connecting groove. The fastener (3) can slide relative to the reinforcing rib (2) along the length direction of the reinforcing rib (2). The second end (32) is inserted into the fixing hole of the rotor cup.

2. The rotor dust cover according to claim 1, characterized in that, The dust cover body (1) has a central hole (11) configured for the motor shaft to pass through. The inner side of the dust cover body (1) has a protrusion (4). Along the circumferential direction of the dust cover body (1), the protrusion (4) protrudes from the opening of the central hole (11). The outer periphery of the protrusion (4) is connected to the other end of the reinforcing rib (2).

3. The rotor dust cover according to claim 2, characterized in that, The protrusion (4) and the reinforcing rib (2) are integrally formed with the dust cover body (1).

4. The rotor dust cover according to claim 2, characterized in that, There are multiple reinforcing ribs (2), and the multiple reinforcing ribs (2) are arranged radially at intervals along the circumferential direction of the protrusion (4).

5. The rotor dust cover according to claim 4, characterized in that, There are multiple fasteners (3), and each of the multiple fasteners (3) is provided in a one-to-one correspondence with a multiple of the reinforcing ribs (2).

6. The rotor dust cover according to claim 1, characterized in that, The fixing member (3) is welded to the fixing hole of the rotor cup.

7. The rotor dust cover according to claim 1, characterized in that, The outer side of the dust cover body (1) has a recess (5), and there are multiple recesses (5) arranged at intervals along the circumferential direction of the dust cover body (1).

8. The rotor dust cover according to claim 7, characterized in that, The cross-sectional shape of the pit (5) is fan-shaped, triangular or elliptical.

9. The rotor dust cover according to claim 1, characterized in that, The dust cover body (1), the reinforcing rib (2), and the fastener (3) are all made of plastic.

10. An electric motor, characterized in that, It includes a rotor cup and a rotor dust cover as described in any one of claims 1-9, wherein the rotor dust cover is disposed on the rotor cup.

Images