Brushless motor with sectional shell

Abstract

The utility model discloses a brushless motor with a sectional type housing. Comprising a first cylinder body, a second cylinder body, a stator and a rotor, the first cylinder body and the second cylinder body are oppositely combined, stator fixing frames are arranged in the first cylinder body and the second cylinder body, the stator is fixedly installed on the stator fixing frames, the rotor transversely penetrates through the stator, bearing installation grooves are formed in the stator fixing frames, and bearings are connected to the two ends of the rotor. The bearings are installed in the corresponding bearing installation grooves respectively, one end of the rotor penetrates through the bearing installation grooves and is fixedly connected with an impeller, and flow guide plates are arranged between the first barrel and the corresponding stator fixing frame and between the second barrel and the corresponding stator fixing frame respectively. According to the utility model, the original integrated cylinder body is divided into the first cylinder body and the second cylinder body to form two assembly bodies, so that the first cylinder body or the second cylinder body with different guide plates can be flexibly replaced according to requirements during production and manufacturing, the product can be changed according to actual requirements, and the technical effect of flexible application is achieved.

Description

Technical Field

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

[0002] As is well known, a brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Because brushless DC motors operate under self-control, they do not require an additional starting winding on the rotor like synchronous motors that start under heavy loads with frequency conversion speed regulation, nor do they experience oscillations or loss of synchronization during sudden load changes. Therefore, brushless motors are used in various electrical appliances, especially in household appliances such as hair dryers and vacuum cleaners.

[0003] For brushless motors used in hair dryers or vacuum cleaners, the structure includes an impeller and a baffle plate inside the housing to increase the air pressure blown out by the impeller. However, the housing of existing brushless motors is an integrated cylindrical body, and the baffle plate is located between the cylindrical body and the stator support, and is integral with the cylindrical body. This means that the baffle plate must be manufactured as a single piece with the cylindrical body. This limits the shape of the baffle plate in the upper and lower halves of the cylindrical body to one type, such as inclined, curved, or vertical. However, in practical applications, it is impossible to achieve corresponding customized designs for different needs. For example, some require vertical baffle plate in the lower half and curved baffle plate in the upper half, or vertical baffle plate in the upper half and curved baffle plate in the lower half, or vertical baffle plate in the lower half and inclined baffle plate in the upper half. Therefore, existing brushless motors are difficult to flexibly combine during assembly and production. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a brushless motor with a segmented housing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A segmented housing brushless motor includes a first cylinder, a second cylinder, a stator, and a rotor. The first and second cylinders are aligned with each other. A stator mounting bracket is provided inside both the first and second cylinders, and the stator is fixedly mounted on the stator mounting bracket. The rotor passes through the stator. Each stator mounting bracket is provided with a bearing mounting groove. Bearings are connected to both ends of the rotor and are respectively installed in the corresponding bearing mounting groove. One end of the rotor passes through the bearing mounting groove and is fixedly connected to an impeller. A guide plate is provided between the first and second cylinders and their respective stator mounting brackets.

[0007] Preferably, a pre-compressed spring is fitted on the rotor shaft, with one end of the spring abutting against the rotor's magnet and the other end of the spring abutting against a bearing at the same end.

[0008] Preferably, a docking port is provided at one end of the first cylinder, and a docking end that can be inserted into the docking port is provided at one end of the second cylinder. At least one adhesive groove is provided on the inner wall of the docking port or the outer end face of the docking end.

[0009] Preferably, both the mating end and at least the mating port are provided with positioning ports that can be aligned with each other.

[0010] Preferably, it also includes a circuit board, wherein the stator coil winding is connected to a conductive post, one end of which passes through the stator mounting bracket and is placed on the outside and soldered to the pads of the circuit board.

[0011] Preferably, each of the stator fixing frames is provided with air guide holes, which are connected to the coil windings of the stator.

[0012] Preferably, a sheath is provided between the stator coil winding and the first and second cylinders, and the sheath is made of insulating material.

[0013] By adopting the above solution, this utility model divides the originally integrated cylinder into two parts, the first cylinder and the second cylinder, to form two assemblies. This allows for flexible replacement of the first or second cylinder with different guide vanes during manufacturing, enabling the product to be modified according to actual needs and achieving a flexible application effect. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of the structure from another direction of an embodiment of the present invention.

[0016] Figure 3 This is a cross-sectional view of an embodiment of the present utility model.

[0017] Figure 4 This is a schematic diagram of the separated structure of an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of 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 or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] 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 communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] like Figures 1 to 4 As shown in the figure, this embodiment provides a segmented housing brushless motor, including a first cylinder 1, a second cylinder 2, a stator 3, and a rotor 4. The first cylinder 1 and the second cylinder 2 are aligned with each other. A stator mounting bracket 5 is provided inside both the first cylinder 1 and the second cylinder 2. The stator 3 is fixedly installed on the stator mounting bracket 5. The rotor 3 passes through the stator 3. A bearing mounting groove 6 is provided on each of the stator mounting brackets 5. Bearings 7 are connected to both ends of the rotor 4. The bearings 7 are respectively installed in the corresponding bearing mounting grooves 6. One end of the rotor 4 passes through the bearing mounting groove 6 and is fixedly connected to an impeller 8. A guide plate 9 is provided between the first cylinder 1 and the second cylinder 2 and their respective stator mounting brackets 5. In actual use, multiple first cylinders 1 and second cylinders 2 with different styles of guide plates 9 can be set up and then selectively assembled.

[0022] In this embodiment, the original one-piece cylinder is divided into two parts: a first cylinder 1 and a second cylinder 2, forming two assemblies. This allows for flexible replacement of the first cylinder 1 or the second cylinder 2 with different guide plates 9 during manufacturing, enabling the product to be modified according to actual needs and achieving a flexible application effect.

[0023] Furthermore, to make the bearing installation more stable, a pre-compressed spring 10 is fitted on the shaft of the rotor 4 in this embodiment. One end of the spring 10 abuts against the magnet of the rotor 4, and the other end of the spring 10 abuts against the bearing 7 at the same end. By using this pre-compressed spring 10, a preload is provided between the bearing 7 and the rotor 4, thereby making the bearing 7 more securely installed. Once the bearing 7 is more secure, its service life can be extended and noise can be reduced.

[0024] Furthermore, regarding the mating between the first cylinder 1 and the second cylinder 2, this embodiment specifically includes a mating port 11 at one end of the first cylinder 1 and a mating end 12 that can be inserted into the mating port 11 at one end of the second cylinder 2. At least one adhesive-retaining groove 13 is provided on the inner wall of the mating port 11 or the outer end face of the mating end 12. With this design, the mating port 11 and the mating end 12 first mate with each other, and then the adhesive is used for bonding. To allow more adhesive to remain, the adhesive-retaining groove 13 is provided, allowing the groove itself to retain adhesive at the mating point, thus ensuring more adhesive is retained there. The number of adhesive-retaining grooves 13 is determined based on actual needs; generally, 3-5 grooves are sufficient to meet the bonding requirements.

[0025] Furthermore, since the first cylinder 1 and the second cylinder 2 are cylindrical structures, when the docking port 11 and the docking end 12 are connected, it is necessary to ensure that their positions correspond. Otherwise, the guide plates 9 between them cannot be aligned. If they are misaligned, wind resistance will be formed, affecting the air outlet efficiency. Therefore, in this embodiment, the docking end 12 and at least the docking port 11 are provided with positioning ports 14 that can be aligned with each other. With the presence of this positioning port 14, after docking, once the positioning ports 14 at the two locations are aligned, it can be confirmed that the first cylinder 1 and the second cylinder 2 are correctly aligned.

[0026] Furthermore, as a brushless motor, this embodiment also includes a circuit board 15. In order to improve the heat dissipation requirements of the circuit board 15 itself, the coil winding of the stator 3 in this embodiment is connected to a conductive post 16. One end of the conductive post 16 passes through the stator fixing frame 5 and is placed on the outside and soldered to the pads of the circuit board 15. In this way, the circuit board 15 can be placed on the outside, thereby allowing for better heat dissipation of the circuit board 15.

[0027] Furthermore, in order to dissipate heat from the coil windings of the stator 3, the stator fixing frame 5 in this embodiment is provided with air guide holes 17. The air guide holes 17 are connected to the coil windings of the stator 3. The airflow generated by the impeller 8 dissipates heat from the coil windings of the stator 3. It should also be noted that the bearing mounting slots 6 are all designed as semi-enclosed structures to prevent air from passing through the bearings 7, thereby reducing the damage caused by air to the bearings 7.

[0028] Furthermore, because the stator is in operation, after being energized, there is a creepage distance at the wire crossing point of the stator 3 coil winding. Therefore, in order to provide insulation protection, a sheath 18 is provided between the coil winding of the stator 3 and the first cylinder 1 and the second cylinder 2 in this embodiment. The sheath 18 is made of insulating material and is specifically located at the wire crossing point of the coil winding. The insulating properties of the sheath 18 provide blocking protection.

[0029] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A brushless motor with a segmented housing, characterized in that: The device includes a first cylindrical body, a second cylindrical body, a stator, and a rotor. The first and second cylindrical bodies are aligned with each other. A stator mounting frame is provided inside both the first and second cylindrical bodies, and the stator is fixedly installed on the stator mounting frame. The rotor passes through the stator. Each stator mounting frame is provided with a bearing mounting groove. Bearings are connected to both ends of the rotor, and the bearings are respectively installed in the corresponding bearing mounting grooves. One end of the rotor passes through the bearing mounting groove and is fixedly connected to an impeller. A guide plate is provided between the first and second cylindrical bodies and their respective stator mounting frames.

2. The brushless motor with a segmented housing as described in claim 1, characterized in that: A pre-compressed spring is fitted onto the rotor shaft. One end of the spring abuts against the rotor's magnet, and the other end of the spring abuts against a bearing at the same end.

3. The brushless motor with a segmented housing as described in claim 1, characterized in that: The first cylinder has a docking port at one end, and the second cylinder has a docking end that can be inserted into the docking port at one end. At least one adhesive groove is provided on the inner wall of the docking port or the outer end face of the docking end.

4. The brushless motor with a segmented housing as described in claim 3, characterized in that: The docking end and at least the docking port are provided with positioning ports that can be aligned with each other.

5. A brushless motor with a segmented housing as described in claim 1, characterized in that: It also includes a circuit board, wherein the stator coil windings are connected to conductive posts, one end of which passes through the stator mounting bracket and is placed on the outside and soldered to the pads of the circuit board.

6. A brushless motor with a segmented housing as described in claim 1, characterized in that: Each stator mounting bracket is provided with an air guide hole, which is connected to the stator coil winding.

7. A brushless motor with a segmented housing as described in claim 1, characterized in that: A sheath, made of insulating material, is provided between the stator coil winding and the first and second cylinders.

Images