External rotor motor capable of preventing magnetic stones from loosening

Abstract

The utility model discloses an external rotor motor for preventing loosening of magnetic stones, and relates to the technical field of external rotor motors, the external rotor motor comprises a casing and an end cover, one end of the casing is provided with the end cover, a rotor is arranged in the casing, a fastening block is arranged at the axis of one side, close to the casing, of the rotor, and a transmission shaft horizontally penetrates through the middle of the fastening block. And the middle section of the transmission shaft is connected with a fixed seat. According to the external rotor motor capable of preventing the magnetic stones from loosening, the pin body is arranged at the joint of the end cover and the transmission shaft, so that the joint of the transmission shaft and the end cover can be locked by a pin due to large inertia of the external rotor, thereby preventing the magnetic stones from loosening, and in addition, the step structure is additionally arranged at the edge of the inner wall of the shell; and the middle part of the fixed seat is provided with a baffle plate structure, so that a silica gel line on one side of the rotor is prevented from penetrating through the lower part of the baffle plate, and friction between the silica gel line and a rotating casing can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of external rotor motor technology, specifically an external rotor motor designed to prevent magnet loosening. Background Technology

[0002] An external rotor motor is a type of electric motor characterized by an external rotor and an internal stator. This design gives external rotor motors advantages such as simple structure, small axial dimensions, and high power-to-weight ratio. Compared to traditional internal rotor motors, external rotor motors have advantages in highly integrated applications, such as electric vehicles, drones, and robots.

[0003] Due to the structural characteristics of conventional external rotor motors, the magnets inside the casing may become loose or move vertically due to the large inertia during operation, which can cause structural damage and affect normal operation.

[0004] Therefore, in view of this, we studied and improved the existing structure and its shortcomings, and proposed an external rotor motor that prevents magnet loosening. Utility Model Content

[0005] The purpose of this invention is to provide an external rotor motor that prevents magnet loosening, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an external rotor motor for preventing magnet loosening, comprising a housing and an end cover. An end cover is installed at one end of the housing, and a rotor is disposed inside the housing. A fastening block is installed at the center of the rotor near the housing, and a transmission shaft is horizontally passed through the middle of the fastening block. A fixing seat is connected to the middle section of the transmission shaft, and a precision bearing is installed at the center of one side of the fixing seat. A pin body is installed at the connection between the end cover and one end of the transmission shaft.

[0007] Furthermore, the housing and the end cover are fixedly connected to each other by an interference fit, and the end cover has a pin hole structure for installing the pin body on the side near the shaft.

[0008] Furthermore, the inner wall of one end of the housing is provided with a stepped structure to prevent the rotor from moving up and down and causing structural loosening, and the housing adopts an integral structure.

[0009] Furthermore, the fastening block is installed in an embedded structure on the side of the rotor near the end cover, and a silicone wire is connected to the side of the rotor away from the fastening block. In addition, magnets are arranged in a ring on the side surface of the rotor.

[0010] Furthermore, the housing, end cover, rotor, fastening block, drive shaft, fixed seat, precision bearing, and pin body are all located on the same central axis, and the drive shaft passes through the axis of the housing, end cover, rotor, fastening block, fixed seat, and precision bearing.

[0011] Furthermore, a spline structure is provided on the surface of the end of the drive shaft away from the rotor, and the pin body is used to lock the structural connection between the drive shaft and the end cover.

[0012] Furthermore, the fixed base has a ring structure on the side surface near the rotor, and a baffle structure is provided in the middle of the fixed base for the silicone wire on one side of the rotor to pass through between the ring structure and the baffle structure.

[0013] Furthermore, the precision bearing is installed in an embedded structure on the shaft center away from the rotor on the fixed seat, and the precision bearing is tightly sleeved on the middle section surface of the transmission shaft.

[0014] This utility model provides an external rotor motor that prevents magnet loosening, which has the following beneficial effects:

[0015] 1. This utility model uses a heat-conducting material to make the casing, and a raised step structure is provided on the inner wall of the casing away from the end cover. This structure can effectively prevent the rotor with magnets mounted on its surface from moving up and down during rotation, thus minimizing the possibility of the magnets becoming loose. The casing itself can also absorb heat to a certain extent and conduct it quickly to the outside. The use of the above structure achieves good structural function with fewer structural elements, without affecting production costs.

[0016] 2. This utility model, by providing a pin hole structure on one side of the end cover, allows the pin body to be installed from inside the pin hole structure when the drive shaft passes horizontally through the axis of the end cover, thereby achieving structural locking between the drive shaft and the end cover. Using the above structure, it effectively addresses the issue of structural loosening during the operation of the outer rotor due to its large inertia. By using a pin body at the connection between the end cover shaft and the end cover, loosening is prevented to the greatest extent, ensuring the structural firmness without interfering with or affecting the structure.

[0017] 3. This utility model features a fixed base on the side of the rotor furthest from the end cover. The fixed base provides structural fixation for the entire device. Furthermore, the ring-shaped structure on one side of the fixed base, combined with the baffle structure in the middle, allows the silicone wire on one side of the rotor to pass between the ring-shaped structure and the baffle structure. This effectively prevents friction between the silicone wire and the rotating housing, thus avoiding damage to the silicone wire. The above structure provides both structural protection and confinement of the silicone wire. The ring-shaped structure also further isolates the rotor, preventing cross-movement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front shaft side view of the main body of an external rotor motor for preventing magnet loosening according to this utility model;

[0019] Figure 2 This is a schematic diagram of the rear shaft side view of the body of an external rotor motor for preventing magnet loosening according to the present invention;

[0020] Figure 3 This is a side view of the exploded shaft structure of an external rotor motor for preventing magnet loosening according to this utility model;

[0021] Figure 4 This is a three-dimensional cross-sectional view of the housing of an external rotor motor for preventing magnet loosening according to this utility model.

[0022] Figure 5 This is a three-dimensional structural diagram of the end cover of an external rotor motor designed to prevent magnet loosening according to this utility model.

[0023] Figure 6 This is a three-dimensional structural diagram of a mounting base for an external rotor motor designed to prevent magnet loosening, according to this utility model.

[0024] In the diagram: 1. Housing; 2. End cover; 3. Rotor; 4. Fastening block; 5. Drive shaft; 6. Fixing seat; 7. Precision bearing; 8. Pin body. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0026] like Figures 1 to 6As shown, an external rotor motor for preventing magnet loosening includes a housing 1 and an end cover 2. The end cover 2 is installed at one end of the housing 1, and a rotor 3 is arranged inside the housing 1. A fastening block 4 is installed at the shaft center of the rotor 3 near the housing 1, and a drive shaft 5 is horizontally passed through the middle of the fastening block 4. A fixing seat 6 is connected to the middle section of the drive shaft 5, and a precision bearing 7 is installed at the shaft center of one side of the fixing seat 6. A pin body 8 is installed at the connection between the end cover 2 and one end of the drive shaft 5. The housing 1 and the end cover 2 are fixedly connected to each other by an interference fit structure. The end cover 2 has a pin hole structure for installing the pin body 8 on the shaft center side. By having a pin hole structure on one side of the end cover 2, when the drive shaft 5 is horizontally passed through the shaft center of the end cover 2, the pin body 8 can be installed from inside the pin hole structure, thereby achieving structural locking between the drive shaft 5 and the end cover 2.

[0027] like Figures 1 to 6 As shown, the inner wall of one end of the housing 1 is provided with a stepped structure to prevent the rotor 3 from moving up and down and becoming loose. The housing 1 is a one-piece structure. The fastening block 4 is embedded and installed on the side of the rotor 3 near the end cover 2. The side of the rotor 3 away from the fastening block 4 is connected with silicone wire. The side surface of the rotor 3 is arranged with magnets in a ring. The housing 1, end cover 2, rotor 3, fastening block 4, drive shaft 5, fixed seat 6, precision bearing 7 and pin body 8 are all on the same central axis. The drive shaft 5 passes through the axis of the housing 1, end cover 2, rotor 3, fastening block 4, fixed seat 6 and precision bearing 7. The housing 1 is made of a good thermally conductive material. The inner wall of the housing 1 is provided with a raised stepped structure on the edge away from the end cover 2. With this structure, if the rotor 3 with magnets on its surface moves up and down during rotation, it can play a good structural blocking role.

[0028] like Figures 1 to 6 As shown, a spline structure is provided on the surface of the drive shaft 5 away from the rotor 3, and the pin body 8 is used to lock the structural connection between the drive shaft 5 and the end cover 2. The fixed seat 6 is provided with a ring structure on the surface near the rotor 3, and a baffle structure is provided in the middle of the fixed seat 6 for the silicone wire on one side of the rotor 3 to pass through between the ring structure and the baffle structure. The precision bearing 7 is installed in an embedded structure on the shaft center of the fixed seat 6 away from the rotor 3, and the precision bearing 7 is tightly sleeved on the middle section surface of the drive shaft 5. The fixed seat 6 can provide structural fixation for the entire device. At the same time, because a ring structure is provided on one side of the fixed seat 6, and a baffle structure is provided in the middle, the silicone wire on one side of the rotor 3 can pass through between the ring structure and the baffle structure.

[0029] In summary, as Figures 1 to 6As shown, in use, the anti-magnetic-loosening external rotor motor first has the fastening block 4 fitted into the shaft on the side of the rotor near the end cover 2. Then, the precision bearing 7 is fitted into the shaft on the side of the fixed seat 6 away from the rotor 3. Then, using the drive shaft 5, the end cover 2, the housing 1, the rotor 3 with the fastening block 4, and the fixed seat 6 with the precision bearing 7 are structurally connected. After that, the pin body 8 can be screwed into the pin hole structure on one side of the end cover 2 to lock the connection between the end cover 2 and the drive shaft 5. During this process, the silicone wire on one side of the rotor 3 can pass between the annular structure and the baffle structure of the fixed seat 6 to avoid rubbing against the rotating housing 1. The stepped structure added to the housing 1 can effectively prevent the magnets on the surface of the rotor 3 from moving up and down, reducing the risk of magnets falling off.

[0030] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An external rotor motor for preventing magnet loosening, comprising a housing (1) and an end cover (2), characterized in that: An end cover (2) is installed at one end of the housing (1), and a rotor (3) is provided inside the housing (1). A fastening block (4) is installed at the center of the rotor (3) near the housing (1), and a drive shaft (5) is horizontally passed through the middle of the fastening block (4). A fixed seat (6) is connected to the middle section of the drive shaft (5), and a precision bearing (7) is installed at the center of the fixed seat (6). A pin body (8) is installed at the connection between the end cover (2) and one end of the drive shaft (5).

2. The external rotor motor for preventing magnet loosening according to claim 1, characterized in that, The housing (1) and the end cover (2) are fixedly connected to each other by an interference fit, and the end cover (2) has a pin hole structure for installing the pin body (8) on the side near the shaft.

3. The external rotor motor for preventing magnet loosening according to claim 1, characterized in that, The inner wall of one end of the housing (1) is provided with a stepped structure to prevent the rotor (3) from moving up and down and causing structural loosening. The housing (1) is an integral structure.

4. The external rotor motor for preventing magnet loosening according to claim 1, characterized in that, The fastening block (4) is installed in an embedded structure on the side of the rotor (3) near the end cover (2) at the center of the shaft. A silicone wire is connected to the side of the rotor (3) away from the fastening block (4), and magnets are arranged in a ring on the side surface of the rotor (3).

5. The external rotor motor for preventing magnet loosening according to claim 1, characterized in that, The housing (1), end cover (2), rotor (3), fastening block (4), drive shaft (5), fixed seat (6), precision bearing (7) and pin body (8) are all on the same central axis, and the drive shaft (5) passes through the axis of the housing (1), end cover (2), rotor (3), fastening block (4), fixed seat (6) and precision bearing (7).

6. The external rotor motor for preventing magnet loosening according to claim 1, characterized in that, The drive shaft (5) has a spline structure on the surface of the end away from the rotor (3), and the pin body (8) is used to lock the structural connection between the drive shaft (5) and the end cover (2).

7. The external rotor motor for preventing magnet loosening according to claim 1, characterized in that, The fixed seat (6) has a ring structure on one side surface near the rotor (3), and a baffle structure is provided in the middle of the fixed seat (6) for the silicone wire on one side of the rotor (3) to pass through between the ring structure and the baffle structure.

8. The external rotor motor for preventing magnet loosening according to claim 1, characterized in that, The precision bearing (7) is installed in an embedded structure on the side of the fixed seat (6) away from the rotor (3) and the precision bearing (7) is tightly sleeved on the middle section surface of the transmission shaft (5).

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