Stator structure for an external rotor electric machine

Abstract

The application discloses an outer rotor motor stator structure and relates to the technical field of motor stators. The outer rotor motor stator structure comprises a first stator, a second stator, a third stator, a contact mechanism and a connecting mechanism. The second stator is arranged below the first stator. The third stator is arranged below the second stator. The contact mechanism is arranged in the first stator. The contact mechanism comprises an intercepting assembly and a fixed pad. The intercepting assembly is used for controlling the fixed pad to be in a natural state or a compressed state. The connecting mechanism is arranged on the outside of the first stator. The connecting mechanism is in contact with the inner wall of the second stator. The connecting mechanism is in contact with the inner wall of the third stator. The second stator is provided with a plurality of connecting mechanisms. The outer rotor motor stator structure is fixed and protected through the contact mechanism and the connecting mechanism to the winding and the stator, so that the possibility of winding loosening or stator loosening is reduced, and the use efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of motor stator technology, specifically to an external rotor motor stator structure. Background Technology

[0002] The stator is the stationary part of an electric motor or generator. It consists of three parts: the stator core, the stator windings, and the frame. The stator is used to generate a rotating magnetic field. An external rotor motor is characterized by its rotor located outside the stator, while the stator is located inside. This design allows external rotor motors to achieve higher efficiency and smaller size in certain applications.

[0003] For example, a patent entitled "An External Rotor Motor Stator Structure" (patent application number: CN202210519562.1) discloses the use of expansion pins to install and fix the winding teeth, auxiliary teeth, and stator body, thereby preventing the stator teeth from failing to fit into the stator or from being damaged by excessive installation pressure. However, during motor use, phenomena such as motor vibration can easily cause the winding to loosen, affecting the motor's performance. Summary of the Invention

[0004] To overcome the problem that the windings may loosen due to motor vibration and other phenomena during motor use, thus affecting the motor's performance, this invention provides an external rotor motor stator structure, including a first stator;

[0005] The second stator is located below the first stator;

[0006] The third stator is disposed below the second stator;

[0007] A contact mechanism is disposed inside the first stator. The contact mechanism includes an intercepting component and a fixing pad. The intercepting component is used to control the fixing pad to be in a natural state or a compressed state.

[0008] Preferably, a connecting mechanism is installed on the outside of the first stator, the connecting mechanism is in contact with the inner wall of the second stator, the connecting mechanism is in contact with the inner wall of the third stator, and multiple second stators are provided.

[0009] Preferably, the contact mechanism further includes:

[0010] A fixing groove is formed inside the first stator, and a movable rod is slidably connected inside the fixing groove. The movable rod is connected to the interception assembly.

[0011] The connecting holes penetrate the interior of the first stator. Multiple connecting holes are provided and evenly distributed. The connecting holes can serve a positioning function. The even distribution of the connecting holes allows for real-time observation of whether the winding at the top of the first stator is uniform or loose.

[0012] A fixed shaft is installed inside the fixed groove, and the fixed shaft is connected to a fixed pad, which is made of an elastic material.

[0013] The contact plate is installed on the outside of the fixing pad. The contact plates are symmetrically arranged and inclined. The contact plates are used to contact the fixing winding.

[0014] The connector is installed at both ends of the fixing pad, the connector is set in an arc shape, and the connector is made of an elastic material.

[0015] Preferably, the interception component includes:

[0016] A retaining ring is installed on the outside of the moving rod. Two retaining rings are provided, and both retaining rings are made of rubber.

[0017] The first intercepting bar is installed on the outside of the movable bar and is located inside the fixed groove;

[0018] The second intercepting rod is connected to the bottom of the moving rod and is located inside the second stator. A connecting rod is installed at the bottom of the second intercepting rod.

[0019] The third intercepting rod is connected to the bottom of the connecting rod and is located inside the third stator. A spring is installed at the bottom of the third intercepting rod and is installed inside the third stator.

[0020] Preferably, the connecting mechanism includes:

[0021] A connecting plate, which contacts the inner wall of the first stator, and a second through groove is provided inside the connecting plate;

[0022] A bottom ring is installed at the bottom of the connecting plate. A gasket is installed on the upper surface of the bottom ring. Multiple gaskets are provided and evenly distributed. A first through groove is opened inside the bottom ring.

[0023] A surrounding plate is installed outside the connecting plate. The surrounding plate is designed in a ring shape and does not directly contact the stator to avoid affecting the heat dissipation of the stator.

[0024] Preferably, the connecting mechanism further includes:

[0025] A connecting rod is installed on the outside of the connecting plate. The connecting rod is configured as an arc-shaped rod, and a base plate is installed at the bottom of the connecting rod.

[0026] An adjusting rod is installed on the top of the base plate, and a pressure plate is installed on the top of the adjusting rod. The bottom of the pressure plate has a slot, and the pressure plate is used to press and fix the top of the first stator.

[0027] This invention provides a stator structure for an external rotor motor. It has the following advantages:

[0028] The stator structure of this external rotor motor employs a contact mechanism to secure and protect the winding. When the fixing pad is in its natural state, it contacts the contact plate and the winding, supporting and fixing the winding. When the fixing pad is compressed, it moves away from the winding, facilitating the winding process. This contact mechanism supports and protects the winding, reducing the possibility of loosening. Furthermore, the first stator has internal connecting holes for positioning; these holes are evenly spaced, allowing for real-time monitoring of the winding's uniformity and looseness.

[0029] This external rotor motor stator structure uses a connecting mechanism to fix the positions of the first stator, multiple second stators, and the third stator, reducing the possibility of loosening between the stators. A first through slot exists between the enclosure plate and the stator, preventing direct contact and avoiding interference with stator heat dissipation during fixing. Adjustable height pressure plates and detachable bottom rings further define the positions of the multiple stators, providing secure fixation and protection.

[0030] The stator structure of this external rotor motor uses an interception assembly to adjust the position of the fixing pad. A moving rod drives the first, second, and third intercepting rods downwards, adjusting the fixing pad to a compressed state and then a natural state. This adjusts the fixing pad and contact plate to provide fixed support for the winding, reducing the possibility of winding loosening.

[0031] This external rotor motor stator structure uses contact and connection mechanisms to secure and protect multiple stators and support the windings. The contact mechanism, controlled by an intercepting assembly, positions the fixing pads and intercepting plates to support and secure the windings. The connection mechanism, through contact between the base plate and pressure plate, secures the first and third stators, thus protecting multiple stators. This reduces the possibility of loosening between stators or loosening of the windings. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the bottom structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the connection mechanism structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the bottom structure of the connecting mechanism of the present invention;

[0036] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A;

[0037] Figure 6 This is a schematic diagram of the contact mechanism structure of the present invention;

[0038] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point B;

[0039] Figure 8 This is a schematic diagram of the interception component structure of the present invention.

[0040] In the diagram: 1. First stator; 2. Connecting mechanism; 201. Connecting plate; 202. Bottom ring; 203. Gasket; 204. First through groove; 205. Enclosure plate; 206. Connecting rod; 207. Second through groove; 208. Base plate; 209. Adjusting rod; 210. Pressure plate; 211. Slot; 3. Contact mechanism; 301. Fixing groove; 302. Connecting hole; 303. Moving rod; 304. Interception assembly; 3041. First interception rod; 3042. Second interception rod; 3043. Locking ring; 3044. Connecting rod; 3045. Third interception rod; 3046. Spring; 305. Fixing shaft; 306. Fixing pad; 307. Contact plate; 308. Connector; 4. Second stator; 5. Third stator. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0042] like Figures 1-8 As shown, the present invention provides a technical solution comprising a first stator 1;

[0043] The second stator 4 is located below the first stator 1;

[0044] The third stator 5 is located below the second stator 4;

[0045] The contact mechanism 3 is located inside the first stator 1. The contact mechanism 3 includes an interception component 304 and a fixing pad 306. The interception component 304 is used to control the fixing pad 306 to be in a natural state or a compressed state.

[0046] When the fixing pad 306 is in its natural state, the fixing pad 306 contacts the winding position and supports and fixes the winding.

[0047] When the fixing pad 306 is in a compressed state, the fixing pad 306 is away from the winding position, which facilitates the winding work.

[0048] The first stator 1 is equipped with a connecting mechanism 2 on its exterior. The connecting mechanism 2 is in contact with the inner wall of the second stator 4 and the inner wall of the third stator 5. The second stator 4 is provided with multiple such mechanisms.

[0049] Before the winding work begins, the contact mechanisms 3 in the first stator 1, multiple second stators 4, and the third stator 5 are adjusted. Then, the winding work is carried out. After the winding work is completed, the contact mechanisms 3 are adjusted to support and reinforce the winding points. Subsequently, the first stator 1, multiple second stators 4, the third stator 5, and the connecting mechanism 2 are connected together to reinforce and support the multiple stators, thereby completing the installation of the stator structure.

[0050] Contact mechanism 3 also includes:

[0051] The fixing slot 301 has multiple fixing slots 301, which are respectively opened inside the first stator 1, the second stator 4 and the third stator 5. A moving rod 303 is slidably connected inside the fixing slot 301. The moving rod 303 is connected to the interception component 304, and the moving rod 303 drives the interception component 304 to rise and fall.

[0052] The connecting hole 302 penetrates the interior of the first stator 1. Multiple connecting holes 302 are provided and evenly distributed. The moving rod 303 is located in the connecting hole 302. The second stator 4 and the third stator 5 also have connecting holes 302 inside. The connecting holes 302 can play a positioning role. The connecting holes 302 are evenly distributed. By observing whether the connecting holes 302 are exposed, it is possible to observe in real time whether the winding outside the first stator 1 is uniform or loose.

[0053] A fixed shaft 305 is installed inside a fixed groove 301. The fixed shaft 305 is connected to a fixed pad 306, which is made of an elastic material.

[0054] Contact plate 307, the contact surface of contact plate 307 and winding is set as an adhesive plate, contact plate 307 is installed on the outside of fixing pad 306, contact plates 307 are symmetrically arranged, contact plates 307 are inclined, fixing shaft 305, fixing pad 306 and contact plate 307 are all provided in multiples, contact plate 307 contacts the corresponding winding and reinforces the corresponding winding position;

[0055] Connector 308 is installed at both ends of fixing pad 306. Connector 308 is set in an arc shape and is made of elastic material. Interception component 304 presses fixing pad 306 by contacting the arc-shaped connector 308.

[0056] Before the winding operation begins, the intercepting component 304 is adjusted to compress the fixing pad 306, keeping it and the contact plate 307 away from the opening of the fixing groove 301, thus providing working space for the winding. After the winding operation is completed, the intercepting component 304 is adjusted to separate from the fixing pad 306, allowing the fixing pad 306 to return to its natural state. The fixing pad 306 and the contact plate 307 then contact the external winding, supporting and fixing the winding. Furthermore, due to the friction between the fixing pad 306 and the winding, and the fact that the contact surface between the contact plate 307 and the winding is designed as an adhesive plate, the winding position is reinforced, reducing the possibility of loosening between the winding and the stator.

[0057] By setting the contact mechanism 3, the winding is supported and protected, reducing the possibility of winding loosening. Furthermore, by setting the interception component 304, the fixing pad 306 is placed in different states, completing the work of reserving winding space or fixing the winding. In addition, the first stator 1 has connecting holes 302 inside, which can serve a positioning function. The connecting holes 302 are evenly distributed, allowing real-time observation of whether the winding is uniform or loose.

[0058] The interception component 304 includes:

[0059] The retaining ring 3043 is installed on the outside of the moving rod 303. There are two retaining rings 3043, both of which are made of rubber. By manually pressing the moving rod 303, the different retaining rings 3043 can be moved into the fixing groove 301.

[0060] The first intercepting rod 3041 is installed on the outside of the movable rod 303 and is located inside the fixed groove 301;

[0061] The second intercepting rod 3042 is connected to the bottom of the moving rod 303. The second intercepting rod 3042 is located inside the second stator 4. A connecting rod 3044 is installed at the bottom of the second intercepting rod 3042. Multiple second intercepting rods 3042 and multiple connecting rods 3044 are provided.

[0062] The third intercepting rod 3045 is connected to the bottom of the connecting rod 3044. The third intercepting rod 3045 is located inside the third stator 5. A spring 3046 is installed at the bottom of the third intercepting rod 3045. The spring 3046 is installed inside the third stator 5.

[0063] When the moving rod 303 is manually pressed, the retaining ring 3043 at the bottom gradually deforms and enters the fixing groove 301. The moving rod 303 drives the first intercepting rod 3041, the connecting rod 3044, the second intercepting rod 3042, and the third intercepting rod 3045 to move downward. The first intercepting rod 3041, the second intercepting rod 3042, and the third intercepting rod 3045 slide to the outside of the fixing pad 306 through the corresponding joint 308. The fixing pad 306 is squeezed and is in a compressed state. At this time, the spring 3046 is squeezed.

[0064] Continue to manually press the moving rod 303. The upper locking ring 3043 gradually deforms and enters the fixing groove 301. The moving rod 303 drives the first intercepting rod 3041, the connecting rod 3044, the second intercepting rod 3042, and the third intercepting rod 3045 to move downward. The first intercepting rod 3041, the second intercepting rod 3042, and the third intercepting rod 3045 slide downward through the corresponding fixing pads 306. The fixing pads 306 gradually return to their natural state. The fixing pads 306 and the contact plate 307 begin to contact the external winding. At this time, the spring 3046 is compressed.

[0065] The connecting mechanism 2 includes:

[0066] The connecting plate 201 is in contact with the inner wall of the first stator 1, and a second through groove 207 is provided inside the connecting plate 201.

[0067] Bottom ring 202 is installed at the bottom of connecting plate 201. A gasket 203 is installed on the upper surface of bottom ring 202. Multiple gaskets 203 are provided and evenly distributed. A first through groove 204 is opened inside bottom ring 202.

[0068] Enclosure 205 is installed on the outside of connecting plate 201, and enclosure 205 is set in a ring shape.

[0069] Before installing multiple stators, the first stator 1, multiple second stators 4, and the third stator 5 are connected by the contact mechanism 3 and then fixed by a stacking process. The bottom ring 202 on the outside of the connecting plate 201 is manually removed, and the first stator 1, multiple second stators 4, and the third stator 5 are manually installed on the outside of the multiple connecting plates 201. Then, the bottom ring 202 is fixed to the bottom of the connecting plate 201 with screws, and the gasket 203 on the top of the bottom ring 202 contacts the bottom surface of the third stator 5.

[0070] The connecting mechanism 2 also includes:

[0071] Connecting rod 206 is installed on the outside of connecting plate 201. Connecting rod 206 is set as an arc rod. A base plate 208 is installed at the bottom of connecting rod 206.

[0072] Adjusting rod 209 is installed on the top of base plate 208. Pressure plate 210 is installed on the top of adjusting rod 209. A slot 211 is opened at the bottom of pressure plate 210. Pressure plate 210 presses and fixes the top of first stator 1 under the action of adjusting rod 209.

[0073] The stroke of the adjusting rod 209 is manually adjusted so that the pressure plate 210 is pressed and fixed on the top of the first stator 1, thereby reinforcing the first stator 1, multiple second stators 4, and the third stator 5.

[0074] By setting up the connecting mechanism 2, the positions of the first stator 1, multiple second stators 4, and the third stator 5 are fixed, reducing the possibility of loosening between the stators. A first through groove 204 exists between the enclosure plate 205 and the stator, preventing direct contact between the enclosure plate 205 and the stator, thus avoiding interference with the stator's heat dissipation during the fixing process. By setting up an adjustable-height pressure plate 210 and a detachable bottom ring 202, the positions of the multiple stators are limited, providing fixed protection for the stators.

[0075] Working principle: Before the winding operation begins, the contact mechanism 3 in the first stator 1, multiple second stators 4, and the third stator 5 is adjusted.

[0076] Before the winding operation begins, the intercepting component 304 is adjusted to compress the fixing pad 306, keeping it and the contact plate 307 away from the opening of the fixing groove 301, thus providing working space for the winding. After the winding operation is completed, the intercepting component 304 is adjusted to separate from the fixing pad 306, allowing the fixing pad 306 to return to its natural state. The fixing pad 306 and the contact plate 307 then contact the external winding, supporting and fixing the winding. Furthermore, due to the friction between the fixing pad 306 and the winding, and the fact that the contact surface between the contact plate 307 and the winding is designed as an adhesive plate, the winding position is reinforced, reducing the possibility of loosening between the winding and the stator.

[0077] When the moving rod 303 is manually pressed, the retaining ring 3043 at the bottom gradually deforms and enters the fixing groove 301. The moving rod 303 drives the first intercepting rod 3041, the connecting rod 3044, the second intercepting rod 3042, and the third intercepting rod 3045 to move downward. The first intercepting rod 3041, the second intercepting rod 3042, and the third intercepting rod 3045 slide to the outside of the fixing pad 306 through the corresponding joint 308. The fixing pad 306 is squeezed and is in a compressed state. At this time, the spring 3046 is squeezed.

[0078] Subsequently, the first stator 1, multiple second stators 4, and the third stator 5 are stacked. After the stacking process, the stator is wound. After the winding process is completed, the contact mechanism 3 is adjusted to provide support and reinforcement at the winding point.

[0079] Continue to manually press the moving rod 303. The upper locking ring 3043 gradually deforms and enters the fixing groove 301. The moving rod 303 drives the first intercepting rod 3041, the connecting rod 3044, the second intercepting rod 3042, and the third intercepting rod 3045 to move downward. The first intercepting rod 3041, the second intercepting rod 3042, and the third intercepting rod 3045 slide downward through the corresponding fixing pads 306. The fixing pads 306 gradually return to their natural state, and the fixing pads 306 and the contact plate 307 begin to contact the external winding.

[0080] Before installing multiple stators, the first stator 1, multiple second stators 4, and the third stator 5 are connected by the contact mechanism 3 and then fixed by a stacking process. The bottom ring 202 on the outside of the connecting plate 201 is manually removed, and the first stator 1, multiple second stators 4, and the third stator 5 are manually installed on the outside of the multiple connecting plates 201. Then, the bottom ring 202 is fixed to the bottom of the connecting plate 201 with screws, and the gasket 203 on the top of the bottom ring 202 contacts the bottom surface of the third stator 5.

[0081] The stroke of the adjusting rod 209 is manually adjusted so that the pressure plate 210 is pressed and fixed on the top of the first stator 1, thereby reinforcing the first stator 1, multiple second stators 4, and the third stator 5.

[0082] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A stator structure for an external rotor motor, comprising a first stator (1), characterized in that: The second stator (4) is disposed below the first stator (1); The third stator (5) is disposed below the second stator (4); Contact mechanism (3), the contact mechanism (3) is disposed inside the first stator (1), the contact mechanism (3) includes an interception component (304) and a fixing pad (306), the interception component (304) is used to control the fixing pad (306) to be in a natural state or a compressed state; A connecting mechanism (2) is installed on the outside of the first stator (1). The connecting mechanism (2) is in contact with the inner wall of the second stator (4) and the inner wall of the third stator (5). The second stator (4) is provided with multiple components. The contact mechanism (3) further includes: A fixed groove (301) is formed inside the first stator (1). A movable rod (303) is slidably connected inside the fixed groove (301). The movable rod (303) is connected to the interception component (304). The movable rod (303) drives the interception component (304) to rise and fall. A connecting hole (302) is provided, which penetrates the interior of the first stator (1). Multiple connecting holes (302) are provided and are evenly distributed. A fixed shaft (305) is installed inside the fixed groove (301). The fixed shaft (305) is connected to a fixed pad (306), which is made of an elastic material. A contact plate (307) is mounted on the outside of a fixing pad (306). The contact plates (307) are symmetrically arranged and inclined. The connector (308) is installed at both ends of the fixing pad (306). The connector (308) is set in an arc shape and is made of an elastic material. The intercepting component (304) presses the fixing pad (306) by contacting the arc-shaped connector (308). The interception component (304) includes: A retaining ring (3043) is installed on the outside of the moving rod (303). There are two retaining rings (3043), both of which are made of rubber. The moving rod (303) drives the retaining rings (3043) into the fixing groove (301). The first intercepting bar (3041) is installed on the outside of the movable bar (303) and is disposed inside the fixed groove (301); The second intercepting rod (3042) is connected to the bottom of the moving rod (303). The second intercepting rod (3042) is located inside the second stator (4). A connecting rod (3044) is installed at the bottom of the second intercepting rod (3042). The third intercepting rod (3045) is connected to the bottom of the connecting rod (3044). The third intercepting rod (3045) is disposed inside the third stator (5). A spring (3046) is installed at the bottom of the third intercepting rod (3045). The spring (3046) is installed inside the third stator (5). The connecting mechanism (2) includes: A connecting plate (201) is in contact with the inner wall of the first stator (1), and a second through groove (207) is provided inside the connecting plate (201); Bottom ring (202), the bottom ring (202) is installed at the bottom of the connecting plate (201), the upper surface of the bottom ring (202) is equipped with a gasket (203), the gasket (203) is provided in multiple and evenly distributed, and the bottom ring (202) has a first through groove (204) inside; A surrounding panel (205) is installed on the outside of the connecting plate (201), and the surrounding panel (205) is configured in an annular shape; The connecting mechanism (2) further includes: A connecting rod (206) is installed on the outside of the connecting plate (201). The connecting rod (206) is configured as an arc-shaped rod, and a base plate (208) is installed at the bottom of the connecting rod (206). An adjusting rod (209) is installed on the top of the base plate (208). A pressure plate (210) is installed on the top of the adjusting rod (209). A slot (211) is provided at the bottom of the pressure plate (210). The pressure plate (210) presses and fixes the top of the first stator (1) under the action of the adjusting rod (209).

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