An electromagnetic field-based shaftless brushless motor

Abstract

The utility model provides a kind of no shaft brushless motor based on electromagnetic field, including shell, vertical magnetic core winding stand, rotating shaft kit, bearing, W phase winding group, U phase winding group, V phase winding group, control circuit, vertical magnetic core winding stand includes support ring, several winding columns, several sector plates, rotating shaft kit includes output sleeve, outer ring part, outer ring part is located the upside of sector plate, W phase winding group is wound on winding column by W phase enameled wire according to the rule of winding every two winding columns apart, form, U phase winding group is wound on winding column by U phase enameled wire according to the rule of winding every two winding columns apart, form, V phase winding group is wound on winding column by V phase enameled wire according to the rule of winding every two winding columns apart, form, the bottom of outer ring part is uniformly distributed with b containing hole, magnet is set in each containing hole, the polarity of the bottom end of adjacent two magnets is opposite, can reduce the radial thickness of motor, improve the performance of motor.

Description

Technical Field

[0001] This utility model relates to the field of brushless motor technology, and more particularly to a shaftless brushless motor based on the electromagnetic field. Background Technology

[0002] Most motors on the market have solid shafts. Due to the presence of solid shafts, when they are used for aerodynamics or underwater propulsion, the blades need to be mounted on solid shafts, which can easily lead to problems such as the solid shaft getting entangled in objects or being hit by objects. Therefore, shaftless motors have emerged, which use cylindrical output shafts instead of solid shafts to meet the needs of different applications.

[0003] Existing shaftless motors have a complex structure, making disassembly and maintenance cumbersome. The winding of their magnetic core frame is radial, and the rotor magnets are radially arranged inside the windings. This type of shaftless motor results in a smaller inner diameter of the cylindrical output shaft and a thicker radial thickness of the motor, which reduces the space for airflow or water flow within the cylindrical output shaft, leading to insufficient motor performance. Summary of the Invention

[0004] The problem to be solved by this utility model is to provide a shaftless brushless motor based on the electromagnetic field, which simplifies the structure, reduces the radial thickness of the motor, and can maximize the passage space for airflow or water flow, thereby improving the performance of the motor.

[0005] To solve the above technical problems, this utility model provides a shaftless brushless motor based on the electromagnetic field, comprising a housing, a vertical magnetic core winding frame, a rotating shaft assembly, bearings, W-phase winding groups, U-phase winding groups, V-phase winding groups, and a control circuit. The vertical magnetic core winding frame includes a support ring, winding posts evenly distributed on the top of the support ring, and a sector plate connected to the top of the winding posts. The number of winding posts is 'a', where 'a' is an integer multiple of 3. The vertical magnetic core winding frame is fixedly installed inside the housing. The rotating shaft assembly includes an output sleeve and an outer ring connected to the periphery of the output sleeve. One end of the output sleeve is connected to the inner wall of the housing via a bearing. The outer ring is located above the sector plate. The W-phase winding... The first winding group consists of W-phase enameled wire wound around a winding post at intervals of two winding posts per phase. The second winding group consists of U-phase enameled wire wound around a winding post at intervals of two winding posts per phase. The third winding group consists of V-phase enameled wire wound around a winding post at intervals of two winding posts per phase. The W-phase, U-phase, and V-phase enameled wires are wound on different winding posts. One end of each of the W-phase, U-phase, and V-phase enameled wires is connected to the other end, and the other end is electrically connected to the control circuit. The bottom of the outer ring has b evenly distributed receiving holes, and each receiving hole contains a magnet. The bottom polarities of adjacent magnets are opposite.

[0006] Preferably, b = a / 3*4.

[0007] Preferably, b = a / 3 * 2.

[0008] Preferably, the total area of ​​the top surfaces of the a sector plates is equal to the total area of ​​the bottom surfaces of the b magnets.

[0009] Preferably, the outer edge of the support ring is uniformly distributed with wire grooves, and the number of wire grooves is c, where c = a.

[0010] Preferably, it also includes an upper end cover and a lower end cover. The bottom outer edge of the upper end cover and the top outer edge of the lower end cover are provided with annular clearance grooves that match the ends of the outer shell. The top and bottom ends of the outer shell are respectively assembled on the annular clearance grooves of the upper end cover and the lower end cover. A plurality of mounting screw holes are distributed on the wall surface of the annular clearance grooves. The ends of the outer shell are provided with countersunk holes that correspond to the mounting screw holes. The countersunk holes and the mounting screw holes are connected by screws.

[0011] Preferably, the bottom inner edge of the outer casing is provided with an annular limiting groove that matches the support ring, the top surface of the support ring contacts one end surface of the annular limiting groove, and the top outer edge of the lower end cover is provided with an annular step portion that abuts against the bottom end surface of the support ring.

[0012] Preferably, the outer casing is provided with a cable outlet hole.

[0013] Preferably, the output sleeve is provided with an annular limiting part around its periphery, the bottom end face of the annular limiting part is adjacent to the top end face of the receiving hole, and the bottom end face of the bearing is in contact with the top end face of the annular limiting part.

[0014] Preferably, the vertical magnetic core winding frame is made of magnetically conductive metal.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a shaftless brushless motor based on the electromagnetic field. It supplies power to the W-phase enameled wire, U-phase enameled wire, and V-phase enameled wire through a control circuit and controls the direction of current flow. The control circuit can realize the functions of forward and reverse rotation, start and stop, and speed regulation of the motor. The W-phase, U-phase, and V-phase enameled wires are wound onto different winding posts according to a rule of every two winding posts per phase, forming W-phase, U-phase, and V-phase winding groups on the vertical magnetic core winding frame. After assembling the vertical magnetic core winding frame into the housing, the magnets are sequentially inserted into the receiving holes of the outer ring according to the polarity reversal. Then, the bearing is installed at one end of the output sleeve, and the rotating shaft assembly with the bearing is then installed into the housing. The inner wall of the housing and one end of the output sleeve are connected by the bearing, and the upper and lower end covers are assembled at both ends of the housing respectively. The sector plate is opposite to one end of the magnet, and the rotating shaft assembly can rotate in the housing. It has the advantages of simple structure, easy disassembly, and low cost. The winding direction on the winding post is axial, and the magnet is also axially set on the upper side of the winding post, which can reduce the radial thickness of the motor and maximize the space for airflow or water flow, thereby improving the performance of the motor. Attached Figure Description

[0016] Figure 1 A schematic diagram illustrating the external structure of this utility model is provided.

[0017] Figure 2 A cross-sectional view of the present invention is shown.

[0018] Figure 3 An exploded view of the present invention is shown.

[0019] Reference numerals: 1. Outer shell, 10. Countersunk hole, 11. Annular limiting groove, 12. Outlet hole, 2. Vertical magnetic core winding frame, 20. Support ring, 200. Wire passage groove, 21. Winding post, 22. Sector plate, 3. Rotating shaft assembly, 30. Output sleeve, 300. Annular limiting part, 31. Outer ring part, 310. Receiving hole, 32. Magnet, 4. Bearing, 5. Upper end cover, 50. Annular clearance groove, 51. Mounting screw hole, 6. Lower end cover, 60. Annular step part. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.

[0021] Based on the embodiments described in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0022] refer to Figure 1-3 .

[0023] This utility model provides a shaftless brushless motor based on the electromagnetic field, comprising a housing 1, a vertical magnetic core winding frame 2, a rotating shaft assembly 3, bearings 4, W-phase winding groups, U-phase winding groups, V-phase winding groups, and control circuitry. The vertical magnetic core winding frame 2 includes a support ring 20, winding posts 21 evenly distributed on the top of the support ring 20, and a sector plate 22 connected to the top of the winding posts 21. The number of winding posts 21 is 'a', where 'a' is an integer multiple of 3. The vertical magnetic core winding frame 2 is fixedly installed inside the housing 1. The rotating shaft assembly 3 includes an output sleeve 30 and an outer ring portion 31 connected to the circumference of the output sleeve 30. One end of the output sleeve 30 is connected to the inner wall of the housing 1 via bearings 4. The outer ring portion 31 is located above the sector plate 22. The W-phase winding groups consist of... The W-phase enameled wire is wound on the winding post 21 according to the rule of winding every two winding posts 21. The U-phase winding group is formed by winding the U-phase enameled wire on the winding post 21 according to the rule of winding every two winding posts 21. The V-phase winding group is formed by winding the V-phase enameled wire on the winding post 21 according to the rule of winding every two winding posts 21. The W-phase, U-phase, and V-phase enameled wires are wound on different winding posts 21 respectively. One end of the W-phase, U-phase, and V-phase enameled wires is connected and the other end is electrically connected to the control circuit. The bottom of the outer ring 31 has b receiving holes 310 evenly distributed. Each receiving hole 310 is provided with a magnet 32. The bottom polarities of two adjacent magnets 32 are opposite.

[0024] Specifically, the W-phase, U-phase, and V-phase enameled wires can be single-core or multi-strand enameled wires. The enameled wires are primarily used to wind around the winding posts 21, generating intermittent magnetism when energized to drive the magnet 32, thereby rotating the rotating shaft assembly 3. According to design rules, the number of winding posts 21 on the vertical magnetic core winding frame 2 should be an integer multiple of 3. The attached diagram illustrates a case with 21 winding posts on the vertical magnetic core winding frame 2. Given any arbitrary starting point for the winding posts, the 21 winding posts are designated as posts 1, 2, 3...20, 21.

[0025] The winding posts corresponding to the W phase winding group are: No. 1, No. 4, No. 7, No. 10, No. 13, No. 16, and No. 19;

[0026] The winding posts corresponding to the U-phase winding group are: No. 2, No. 5, No. 8, No. 11, No. 14, No. 17, and No. 20;

[0027] The winding posts corresponding to the V-phase winding group are: No. 3, No. 6, No. 9, No. 12, No. 15, No. 18, and No. 21.

[0028] That is, winding posts 1, 2, and 3 correspond to the first W, U, and V of the three winding groups. Following this rule, each winding group corresponds to seven winding posts 21. The enameled wire is wound around one winding post 21 every two winding posts 21. The control circuit can use a conventional three-phase motor circuit. The control circuit has W-phase connection terminals, U-phase connection terminals, and V-phase connection terminals. The connection method is to connect the ends of the W-phase, U-phase, and V-phase enameled wires together, and then lead out the other ends of the wires. These ends are then connected to the W-phase, U-phase, and V-phase connection terminals of the control circuit, respectively. This allows control of the motor's forward and reverse rotation, start / stop, braking, and speed.

[0029] The installation method of magnet 32 ​​depends on the winding method of winding post 21. Different winding methods result in different arrangements of magnet 32. For example, if the winding method of winding post 21 is W corresponding to winding post 1, U corresponding to winding post 2, and V corresponding to winding post 3, then the magnetic orientation of the bottom of magnet 32 ​​is arranged as follows: the first receiving hole is the N pole, the second receiving hole is the S pole, the third receiving hole is the N pole, the fourth receiving hole is the S pole, and so on. If the winding method of winding post 21 is W corresponding to winding posts 1 and 2, U corresponding to winding posts 3 and 4, and V corresponding to winding posts 5 and 6, then the magnetic orientation of the bottom of magnet 32 ​​is arranged as follows: the first and second receiving holes are the N pole, the third and fourth receiving holes are the S pole, the fifth and sixth receiving holes are the N pole, the seventh and eighth receiving holes are the S pole, and so on.

[0030] The rotating shaft kit 3 can be modified according to functional requirements. For example, it can be designed as a fan blade that conforms to airflow when used in a scenario that propels airflow, or as a propeller that conforms to water flow when used in a scenario that propels water flow. Gears can also be added to the inside of the output sleeve 30 and connected to a speed reduction device to convert part of the rotation speed into power output. Users can assemble and apply it to various usage environments.

[0031] Based on the above embodiment, b = a / 3*4. The attached figure illustrates the case where the vertical magnetic core winding frame 2 has 21 winding posts, and the corresponding number of receiving holes 310 is 28, that is, there are 28 magnets 32 on the outer ring 31.

[0032] Based on the above embodiment, b = a / 3*2. The attached figure illustrates the case where the vertical magnetic core winding frame 2 has 21 winding posts, and the corresponding number of receiving holes 310 is 14, that is, there are 14 magnets 32 on the outer ring 31.

[0033] Based on the above embodiments, the total area of ​​the top surface of the a sector plate 22 is equal to the total area of ​​the bottom surface of the b magnet 32.

[0034] Based on the above embodiment, the outer edge of the support ring 20 is uniformly distributed with wire grooves 200, and the number of wire grooves 200 is c, where c = a. When the enameled wire is wound between different winding posts 21, it can transition through the wire grooves 200, which facilitates the arrangement of the winding.

[0035] Based on the above embodiments, it also includes an upper end cover 5 and a lower end cover 6. The bottom outer edge of the upper end cover 5 and the top outer edge of the lower end cover 6 are provided with annular clearance grooves 50 that match the ends of the outer shell 1. The top and bottom ends of the outer shell 1 are respectively assembled on the annular clearance grooves 50 of the upper end cover 5 and the lower end cover 6. A plurality of mounting screw holes 51 are distributed on the wall surface of the annular clearance groove 50. The end of the outer shell 1 is provided with countersunk holes 10 corresponding to the mounting screw holes 51. The countersunk holes 10 and the mounting screw holes 51 are connected by screws, which has the advantages of convenient disassembly and assembly and compact structure.

[0036] Based on the above embodiments, the bottom inner edge of the outer shell 1 is provided with an annular limiting groove 11 that matches the support ring 20, the top surface of the support ring 20 contacts one end surface of the annular limiting groove 11, and the top outer edge of the lower end cover 6 is provided with an annular step portion 60, which abuts against the bottom surface of the support ring 20.

[0037] Based on the above embodiments, the outer casing 1 is provided with a wire outlet hole 12 to facilitate the lead-out of one end of the W-phase enameled wire, U-phase enameled wire, and V-phase enameled wire.

[0038] Based on the above embodiments, an annular limiting part 300 is provided around the output sleeve 30. The bottom end face of the annular limiting part 300 is adjacent to the top end face of the receiving hole 310. The bottom end face of the bearing 4 is in contact with the top surface of the annular limiting part 300. When the magnet 32 ​​group is inserted into the end of the receiving hole 310, it will abut against the bottom end face of the annular limiting part 300, which plays a limiting role and ensures that the magnet 32 ​​group is inserted into place.

[0039] Based on the above embodiments, the vertical magnetic core winding frame 2 is made of magnetically conductive metal. After the winding is energized, the sector plate 22 generates magnetism, thereby generating a driving force on the magnet 32.

[0040] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A shaftless brushless motor based on the electromagnetic field, characterized in that, The device includes a housing, a vertical magnetic core winding frame, a rotating shaft assembly, bearings, W-phase winding groups, U-phase winding groups, V-phase winding groups, and control circuitry. The vertical magnetic core winding frame includes a support ring, winding posts evenly distributed on the top of the support ring, and a sector plate connected to the top of the winding posts. The number of winding posts is 'a', where 'a' is an integer multiple of 3. The vertical magnetic core winding frame is fixedly installed inside the housing. The rotating shaft assembly includes an output sleeve and an outer ring connected to the periphery of the output sleeve. One end of the output sleeve is connected to the inner wall of the housing via the bearings. The outer ring is located above the sector plate. The W-phase winding groups are composed of W-phase enameled wire, with each phase separated by two winding posts. The winding is formed by winding the U-phase wire onto the winding post according to a rule. The U-phase winding group is formed by winding the U-phase enameled wire onto the winding post according to a rule of winding every two winding posts. The V-phase winding group is formed by winding the V-phase enameled wire onto the winding post according to a rule of winding every two winding posts. The W-phase, U-phase, and V-phase enameled wires are wound onto different winding posts respectively. One end of each of the W-phase, U-phase, and V-phase enameled wires is connected, and the other end is electrically connected to the control circuit. The bottom of the outer ring is evenly distributed with b receiving holes, and each receiving hole is provided with a magnet. The bottom polarities of adjacent magnets are opposite.

2. The shaftless brushless motor based on the electromagnetic field according to claim 1, characterized in that, b = a / 3 * 4.

3. The shaftless brushless motor based on the electromagnetic field according to claim 1, characterized in that, b = a / 3 * 2.

4. A shaftless brushless motor based on the electromagnetic field according to claim 2 or 3, characterized in that, The total area of ​​the top surface of each of the a sector plates is equal to the total area of ​​the bottom surface of each of the b magnets.

5. A shaftless brushless motor based on the electromagnetic field according to claim 4, characterized in that, The outer edge of the support ring is uniformly distributed with wire grooves, and the number of wire grooves is c, where c = a.

6. A shaftless brushless motor based on the electromagnetic field according to claim 5, characterized in that, It also includes an upper end cover and a lower end cover. The bottom outer edge of the upper end cover and the top outer edge of the lower end cover are provided with annular clearance grooves that match the ends of the outer shell. The top and bottom ends of the outer shell are respectively assembled on the annular clearance grooves of the upper end cover and the lower end cover. A plurality of mounting screw holes are distributed on the wall surface of the annular clearance groove. The end of the outer shell is provided with countersunk holes that correspond to the mounting screw holes. The countersunk holes and the mounting screw holes are connected by screws.

7. A shaftless brushless motor based on the electromagnetic field according to claim 6, characterized in that, The bottom inner edge of the outer casing is provided with an annular limiting groove that matches the support ring. The top surface of the support ring contacts one end surface of the annular limiting groove. The top outer edge of the lower end cover is provided with an annular step portion, which abuts against the bottom surface of the support ring.

8. A shaftless brushless motor based on the electromagnetic field according to claim 7, characterized in that, The outer casing is provided with a cable outlet hole.

9. A shaftless brushless motor based on the electromagnetic field according to claim 8, characterized in that, The output sleeve is provided with an annular limiting part around its periphery. The bottom end face of the annular limiting part is adjacent to the top end face of the receiving hole, and the bottom end face of the bearing is in contact with the top end face of the annular limiting part.

10. A shaftless brushless motor based on the electromagnetic field according to claim 1, characterized in that, The vertical magnetic core winding frame is made of magnetically conductive metal.

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