Rear cover integrated stator and brushless motor

Abstract

The utility model discloses a rear cover integrated stator and brushless motor, including: an integrated stator seat and a magnetic braiding component, the integrated stator seat includes a magnetic braiding fixing frame, a dustproof grating, heat dissipation teeth and an external fixing component, the heat dissipation teeth are arranged on the magnetic braiding fixing frame, the dustproof grating is sleeved outside the heat dissipation teeth, and the external fixing component is arranged on the magnetic braiding fixing frame. The outer fixing assembly is installed on the side face, away from the heat dissipation teeth, of the dustproof grille. The magnetic braiding assembly comprises a magnetic braiding plate and a magnetic braiding cover, the magnetic braiding cover is arranged on the magnetic braiding plate, and the magnetic braiding plate is detachably installed on the magnetic braiding fixing frame. According to the utility model, the dustproof grid structure is arranged on the integrated stator seat, so that solids larger than 1mm can be prevented from entering the motor, the protection of the motor is enhanced, the IP45 protection level is reached, and the service life of the motor is greatly prolonged; and the detachable magnetic braiding plate is arranged, that is, a split type magnetic braiding component structure is designed at the tail end of the stator, so that the requirements of different customers can be met, the independent modules can be increased or reduced according to use scenes, and the adaptability of the brushless motor is improved.

Description

Technical Field

[0001] This utility model relates to the field of charging, and in particular to an integrated stator and brushless motor with a rear cover. Background Technology

[0002] Multi-rotor drones possess unique advantages over other drones. Compared to fixed-wing aircraft, they can take off and land vertically and hover at a fixed point. Compared to single-rotor helicopters, they use brushless motors for power and lack a tail rotor, resulting in simpler mechanical structures, higher safety, and lower operating costs. Multi-rotor drones typically employ a centrally symmetrical or axisymmetric structure, offering strong maneuverability, vertical takeoff and landing, and hovering capabilities. They are primarily suitable for low-altitude, low-speed missions requiring vertical takeoff and landing and hovering.

[0003] Multirotor drones have a wide range of applications in many fields. In the commercial sector, they can be used for filming and advertising, such as filming construction sites or providing aerial photography at weddings, adding a unique perspective to the event. Furthermore, multirotor drones are widely used in agriculture, such as monitoring crop health and spraying pesticides, greatly improving agricultural production efficiency. In public safety, multirotor drones can assist police in aerial surveillance, providing real-time intelligence for search and rescue operations. They are also used for environmental monitoring, such as monitoring forest fires or wildlife activity. In addition, multirotor drones have wide applications in emergency rescue and power line inspection. In short, the emergence of multirotor drones has brought many conveniences to our lives.

[0004] For brushless motors used in industrial applications, their internal structure consists of a rotor and a stator. These motors require high efficiency, strong heat dissipation, high protection, fixed propellers, modularity, and high structural reliability. They also need to prevent dust from entering the motor during takeoff and landing. If the motor is used in vertical takeoff and landing (VTOL) drones, it also needs to maintain propeller stability after takeoff to ensure the drone remains stationary during level flight. Therefore, reliable dust protection and a magnetically woven propeller structure are particularly important. Thus, designing a well-protected, detachable magnetically woven plate assembly structure and a brushless motor with fixed propeller functionality is a problem that those skilled in the art need to consider. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an integrated stator and brushless motor with a rear cover.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An integrated stator with a rear cover, comprising:

[0008] An integrated stator base includes a magnetic braiding fixing frame, a dustproof grille, heat dissipation teeth, and an external fixing component. The heat dissipation teeth are disposed on the magnetic braiding fixing frame, the dustproof grille is sleeved on the outside of the heat dissipation teeth, and the external fixing component is installed on the side of the dustproof grille away from the heat dissipation teeth.

[0009] A magnetic braiding assembly, comprising a magnetic braiding plate and a magnetic braiding cover, wherein the magnetic braiding cover is disposed on the magnetic braiding plate and the magnetic braiding plate is detachably mounted on the magnetic braiding fixing frame.

[0010] In one embodiment, the magnetic braiding fixing frame includes a fixing ring and a plurality of outer edge protrusions, each of the outer edge protrusions being respectively arranged around the fixing ring, and the outer edge protrusions being used to fix the magnetic braiding plate.

[0011] In one embodiment, a screw hole is provided on the outer edge protrusion, and the magnetic braiding plate is fixed to the outer edge protrusion by screws / bolts.

[0012] In one embodiment, the external fixing assembly includes a fixing circular plate and a plurality of external support ribs, each of the external support ribs being arranged in a ring on the fixing circular plate, and each of the external support ribs being installed on the side of the dustproof grille away from the heat dissipation teeth;

[0013] The fixed circular plate has a magnetic braiding mounting cavity, and the magnetic braiding cover is housed in the magnetic braiding mounting cavity.

[0014] In one embodiment, the magnetic braiding assembly further includes a magnetic braiding sheath and a magnetic braiding wire. The magnetic braiding sheath is sleeved on one end of the magnetic braiding wire, the magnetic braiding wire is electrically connected to the magnetic braiding plate, and a first wire outlet groove is provided on the magnetic braiding cover.

[0015] The fixed circular plate is also provided with a wire sleeve slot and a second wire outlet groove. The wire sleeve slot is connected to the magnetic braiding installation cavity and the second wire outlet groove respectively. The first wire outlet groove and the second wire outlet groove together form a wire outlet channel. The dustproof grille is provided with a wire outlet. The magnetic braiding sheath is snapped onto the wire sleeve slot. The wire outlet channel is used to accommodate the magnetic braided wire, and the magnetic braided wire passes through the wire outlet.

[0016] In one embodiment, the heat dissipation tooth includes a heat dissipation bracket and a plurality of heat dissipation fins. The heat dissipation bracket is disposed on the magnetic braid fixing frame, and each heat dissipation fin is disposed on the heat dissipation bracket. Each heat dissipation fin is used to be embedded between two stator windings.

[0017] In one embodiment, the magnetic cover has a plurality of weight-reducing holes, which are spaced apart from each other.

[0018] In one embodiment, the integrated back cover stator further includes a stator winding, a first bearing, and a second bearing. The stator winding is provided with multiple iron cores, and each iron core is wound with a coil. The stator winding is sleeved outside the heat dissipation teeth, and the first bearing and the second bearing are respectively mounted on the magnetic braiding fixing frame.

[0019] This utility model also provides a brushless motor, including the aforementioned integrated stator with a rear cover, and a rotor assembly. The rotor assembly is disposed outside the stator winding, and the central shaft of the rotor assembly passes through the first bearing and the second bearing.

[0020] In one embodiment, a snap-fit ​​assembly is also included, which is mounted on the central shaft of the rotor assembly;

[0021] The snap-fit ​​assembly includes a copper washer, a snap ring, an aluminum washer, and a sensing screw. The copper washer, snap ring, and aluminum washer are sequentially sleeved on a central rotating shaft through which the first bearing and the second bearing pass. The central rotating shaft has a central hole, and the sensing screw is screwed into the central hole of the central rotating shaft.

[0022] The sensing screw has a magnetic slot for mounting a sensing magnetic sheet, which is magnetically connected to the magnetic braiding plate.

[0023] The advantages and beneficial effects of this utility model compared to the prior art are as follows:

[0024] This utility model relates to an integrated stator and brushless motor with a rear cover. By setting a dustproof grid structure on the integrated stator base, it can prevent solid objects larger than 1mm from entering the motor, enhancing motor protection and achieving an IP45 protection rating, thus significantly extending the motor's service life. Furthermore, it features a detachable magnetic braiding plate, i.e., a split magnetic braiding component structure designed at the stator tail end, which can meet the needs of different customers. This independent module can be added or removed according to the usage scenario, improving the adaptability of the brushless motor. In addition, this utility model also incorporates heat dissipation teeth, which can effectively dissipate heat from the stator, improving the stability of the motor during operation and effectively enhancing motor performance. Attached Figure Description

[0025] Figure 1 This is a structural diagram of an integrated stator base according to one embodiment of the present invention;

[0026] Figure 2 for Figure 1 The diagram shows the structure of the integrated stator base.

[0027] Figure 3 This is a structural diagram of the magnetic braiding assembly of this utility model;

[0028] Figure 4 This is a structural diagram of the integrated stator for the rear cover of this utility model;

[0029] Figure 5 This is a structural diagram of the brushless motor of this utility model;

[0030] Figure 6 for Figure 5 The diagram shows the structure of the sensing screw in a brushless motor. Detailed Implementation

[0031] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0032] Please see Figures 1-6 An integrated stator with a rear cover includes: an integrated stator base 100 and a magnetic braiding assembly 200, wherein the magnetic braiding assembly is mounted on the integrated stator base.

[0033] The integrated stator base 100 includes a magnetic braiding fixing frame 110, a dustproof grille 120, heat dissipation fins 130, and an external fixing component 140. The heat dissipation fins are mounted on the magnetic braiding fixing frame, the dustproof grille is fitted over the heat dissipation fins, and the external fixing component is installed on the side of the dustproof grille away from the heat dissipation fins. It should be noted that the magnetic braiding fixing frame 110 serves as the mounting base for the magnetic braiding component, achieving precise assembly with the magnetic braiding plate through positioning pins / screws / bolts. It also serves as the carrier for the heat dissipation fins, transferring heat from the stator windings to the heat dissipation fins through a heat conduction path. The heat dissipation fins 130 are used to form surface contact enhanced convection heat dissipation, improving heat dissipation capacity. The dustproof grille 120 is designed to meet the IP45 protection standard, blocking solid particles with a diameter ≥1mm. At the same time, the grille's opening ratio forms an "airflow coupling" with the heat dissipation fins, achieving a dynamic balance between protection and heat dissipation. The external fixing component 140 is used to assist in the installation of the magnetic braiding component.

[0034] The magnetic braiding assembly 200 includes a magnetic braiding plate 210 and a magnetic braiding cover 220. The magnetic braiding cover is disposed on the magnetic braiding plate, and the magnetic braiding plate is detachably mounted on a magnetic braiding fixing frame. The magnetic braiding plate 210 has a double-layer PCB stacked structure and is electrically connected to the outside world through magnetic braiding wires. The magnetic braiding cover 220 is used to mount the magnetic braiding plate on the stator base. In this embodiment, the magnetic braiding plate is assembled to the magnetic braiding cover using screws. To achieve reliable dust and water resistance, epoxy resin is potted after assembling the magnetic braiding plate, covering the entire magnetic braiding plate. The magnetic braiding cover of this utility model is detachable, and the structure of the separate magnetic braiding cover integrated into the rear cover relative to the magnetic braiding mounting position reduces the processing difficulty. In addition, the selectivity of motor functions and the diversity of application scenarios are improved, making the motor assembly modular, and different combinations meet different needs.

[0035] Thus, by setting a dustproof grid structure on the integrated stator base, solid objects larger than 1mm can be prevented from entering the motor, enhancing motor protection to achieve an IP45 protection rating and significantly extending motor lifespan. Furthermore, the detachable magnetic braiding plate, i.e., a split magnetic braiding assembly structure designed at the stator tail end, can meet the needs of different customers. This independent module can be added or removed according to the usage scenario, improving the adaptability of the brushless motor. In addition, this utility model also incorporates heat dissipation teeth, which can effectively dissipate heat from the stator, improving the stability of the motor during operation and effectively enhancing motor performance. This structure allows for better integration of the entire machine, meeting protection requirements, optional magnetic braiding assembly requirements, and strong heat dissipation requirements.

[0036] Please see Figure 2 The magnetic braiding fixing frame 110 includes a fixing ring 111 and multiple outer edge protrusions 112. Each outer edge protrusion is respectively arranged around the fixing ring and is used to fix the magnetic braiding plate. It should be noted that the fixing ring serves as the core support structure of the magnetic braiding assembly, forming a rigid connection, and also serves as the installation reference for the outer edge protrusions; the outer edge protrusions are used to enhance bending stiffness, and multiple outer edge protrusions are evenly distributed along the circumference of the fixing ring.

[0037] Furthermore, screw holes are provided on the outer protrusion, and the magnetic braiding plate is fixed to the outer protrusion by screws / bolts. In this way, by providing screw holes, the magnetic braiding plate can be fixed, improving the stability of the magnetic induction connection.

[0038] Please see Figure 2 The external fixing assembly 140 includes a fixing circular plate 141 and multiple external support ribs 142. Each external support rib is arranged in a ring on the fixing circular plate and is installed on the side of the dustproof grille away from the heat dissipation teeth. A magnetic braiding mounting cavity 143 is formed on the fixing circular plate, and the magnetic braiding cover is housed in the magnetic braiding mounting cavity. It should be noted that the fixing circular plate 141 is used to fix the multiple external support ribs 142, and each external support rib 142 is used to improve the structural strength and enhance the structural rigidity of the stator.

[0039] Please see Figure 3 The magnetic braiding assembly 200 also includes a magnetic braiding sheath 230 and a magnetic braiding wire 240. The magnetic braiding sheath is sleeved on one end of the magnetic braiding wire, and the magnetic braiding wire is electrically connected to the magnetic braiding plate. A first wire outlet groove 250 is provided on the magnetic braiding cover. It should be noted that the magnetic braiding sheath 230 is used to protect the magnetic braiding wire, and the magnetic braiding wire 240 is used to connect the magnetic braiding plate.

[0040] Further, please refer to Figure 2 and Figure 3 The fixed circular plate 141 is also provided with a wire sleeve holder 144 and a second wire outlet groove 145. The wire sleeve holder is connected to the magnetic braiding installation cavity and the second wire outlet groove respectively. The first wire outlet groove and the second wire outlet groove together form a wire outlet channel. The dustproof grille is provided with a wire outlet 121. The magnetic braiding sheath is snapped into the wire sleeve holder. The wire outlet channel is used to accommodate the magnetic braided wire, and the magnetic braided wire passes through the wire outlet. The wire outlet groove is fixed with silicone, and a wire protection sleeve is installed at the wire outlet to protect the wire, making the wire outlet neat and reliable.

[0041] Please see Figure 1 The heat dissipation bracket 130 includes a heat dissipation support 131 and multiple heat dissipation fins 132. The heat dissipation support is mounted on a magnetic braid fixing frame, and each heat dissipation fin is mounted on the heat dissipation support. Each heat dissipation fin is used to be embedded between two stator windings. It should be noted that the heat dissipation support 131 is used to fix the multiple heat dissipation fins 132, and the heat dissipation fins 132 are used to achieve the heat dissipation function.

[0042] Furthermore, the magnetic cover has several weight-reduction holes spaced apart. By creating these holes, the weight of the stator can be reduced, further achieving lightweight operation.

[0043] Please see Figure 4 An integrated stator with a rear cover also includes a stator winding 300, a first bearing 310, and a second bearing 320. Multiple iron cores are arranged on the stator winding, each with a coil wound around it. The stator winding is fitted over heat dissipation fins. The first and second bearings are respectively mounted on magnetic braiding brackets. The iron cores are coaxially assembled with the integrated stator base, pressed into place, and reinforced with structural adhesive. The two bearings are interference-fitted with the stator base and reinforced with structural adhesive. Thus, by setting the stator winding 300, the first bearing 310, and the second bearing 320, the function of the stator can be realized, and the first and second bearings can connect to the rotor assembly.

[0044] This utility model also provides a brushless motor, including the aforementioned integrated stator 10 with a rear cover, and a rotor assembly 20. The rotor assembly is disposed outside the stator windings, and a first bearing and a second bearing pass through the central shaft of the rotor assembly. The stator assembly and the rotor assembly are coaxially assembled, fitted with washers and retaining rings, and secured with screws. After the stator and rotor assemblies are installed, magnetic braided plates and induction magnetic sheets are assembled as needed, followed by the assembly of the magnetic braided plate and secured with screws.

[0045] Please see Figure 5 The brushless motor also includes a snap-fit ​​assembly 30, which is mounted on the central shaft of the rotor assembly. The snap-fit ​​assembly 30 includes a copper washer 31, a retaining ring 32, an aluminum washer 33, and a sensing screw 34. The copper washer, retaining ring, and aluminum washer are sequentially fitted onto the central shaft through which the first bearing and the second bearing pass. The central shaft has a central hole, and the sensing screw is screwed into the central hole of the central shaft. In this way, by setting the copper washer 31, retaining ring 32, aluminum washer 33, and sensing screw 34, the rotor can be fixed.

[0046] Please see Figure 6 The induction screw has a magnetic plate slot 35 for installing an induction magnetic plate 36, which is magnetically connected to the magnetic braiding plate. It should be noted that the screw with the magnetic plate slot contains a magnetic plate, which can be used to lock the rotor and also provides a slot for installing an induction magnetic plate. Magnetic plates can be installed as needed, and together with the magnetic braiding plate, a stable propeller motor can be formed.

[0047] This utility model's motor stator housing adopts an integrated rear cover structure, machined with heat dissipation teeth and dustproof grilles, ensuring good heat dissipation while preventing dust. The magnetic braiding assembly features a modular design and a detachable structure, allowing for selection and installation according to stator and propeller requirements. The screw heads are designed with magnetic plate slots, making it compatible with both motors with and without magnetic braiding.

[0048] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An integrated stator with a rear cover, characterized in that, include: An integrated stator base includes a magnetic braiding fixing frame, a dustproof grille, heat dissipation teeth, and an external fixing component. The heat dissipation teeth are disposed on the magnetic braiding fixing frame, the dustproof grille is sleeved on the outside of the heat dissipation teeth, and the external fixing component is installed on the side of the dustproof grille away from the heat dissipation teeth. A magnetic braiding assembly, comprising a magnetic braiding plate and a magnetic braiding cover, wherein the magnetic braiding cover is disposed on the magnetic braiding plate and the magnetic braiding plate is detachably mounted on the magnetic braiding fixing frame.

2. The integrated stator for the rear cover according to claim 1, characterized in that, The magnetic braiding fixing frame includes a fixing ring and multiple outer edge protrusions. Each of the outer edge protrusions is respectively arranged around the fixing ring, and the outer edge protrusions are used to fix the magnetic braiding plate.

3. The integrated stator for the rear cover according to claim 2, characterized in that, The outer edge protrusion is provided with screw holes, and the magnetic braiding plate is fixed to the outer edge protrusion by screws / bolts.

4. The integrated stator for the rear cover according to claim 1, characterized in that, The external fixing assembly includes a fixed circular plate and a plurality of external support ribs. Each of the external support ribs is arranged in a ring on the fixed circular plate, and each of the external support ribs is installed on the side of the dustproof grille away from the heat dissipation teeth. The fixed circular plate has a magnetic braiding mounting cavity, and the magnetic braiding cover is housed in the magnetic braiding mounting cavity.

5. The integrated stator for the rear cover according to claim 4, characterized in that, The magnetic braiding assembly also includes a magnetic braiding sheath and a magnetic braiding wire. The magnetic braiding sheath is sleeved on one end of the magnetic braiding wire, and the magnetic braiding wire is electrically connected to the magnetic braiding plate. A first wire outlet groove is provided on the magnetic braiding cover. The fixed circular plate is also provided with a wire sleeve slot and a second wire outlet groove. The wire sleeve slot is connected to the magnetic braiding installation cavity and the second wire outlet groove respectively. The first wire outlet groove and the second wire outlet groove together form a wire outlet channel. The dustproof grille is provided with a wire outlet. The magnetic braiding sheath is snapped onto the wire sleeve slot. The wire outlet channel is used to accommodate the magnetic braided wire, and the magnetic braided wire passes through the wire outlet.

6. The integrated stator with rear cover according to claim 1, characterized in that, The heat dissipation tooth includes a heat dissipation bracket and multiple heat dissipation fins. The heat dissipation bracket is disposed on the magnetic braid fixing frame, and each heat dissipation fin is disposed on the heat dissipation bracket. Each heat dissipation fin is used to be embedded between two stator windings.

7. The integrated stator for the rear cover according to any one of claims 1 to 6, characterized in that, The magnetic cover has several weight-reducing holes, which are spaced apart from each other.

8. The integrated stator for the rear cover according to claim 6, characterized in that, The integrated stator of the rear cover also includes a stator winding, a first bearing and a second bearing. The stator winding is provided with multiple iron cores, and each iron core is wound with a coil. The stator winding is sleeved outside the heat dissipation teeth. The first bearing and the second bearing are respectively installed on the magnetic braid fixing frame.

9. A brushless motor, characterized in that, The device includes an integrated stator with a rear cover as described in any one of claims 1 to 8, and further includes a rotor assembly disposed outside the stator windings, wherein the central shaft of the rotor assembly passes through the first bearing and the second bearing.

10. The brushless motor according to claim 9, characterized in that, It also includes a snap-fit ​​assembly, which is mounted on the central shaft of the rotor assembly; The snap-fit ​​assembly includes a copper washer, a snap ring, an aluminum washer, and a sensing screw. The copper washer, snap ring, and aluminum washer are sequentially sleeved on a central rotating shaft through which the first bearing and the second bearing pass. The central rotating shaft has a central hole, and the sensing screw is screwed into the central hole of the central rotating shaft. The sensing screw has a magnetic slot for mounting a sensing magnetic sheet, which is magnetically connected to the magnetic braiding plate.

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