Device for positioning homopolar magnetic steel of permanent magnet motor rotor

Abstract

The invention provides a device for positioning homopolar magnetic steel of a permanent magnet motor rotor. The device comprises a pipe joint, an end cover ring and a pushing mechanism. At least one pipe joint is arranged, and each pipe joint is provided with a pipe cavity; one pipe joint or a plurality of pipe joints which are sequentially connected end to end can form a barrel structure, and one pipe cavity or the combined pipe cavities form a barrel cavity; the cylinder cavity is used for a rotor shaft equipped with a plurality of magnetic steels to pass through. The number of the end cover rings is two, and the end cover rings are detachably connected with the two ends of the barrel structure respectively. The pushing mechanism is arranged on one of the end cover rings and is provided with a pushing part located in the cylinder cavity, and the pushing part is arranged around the rotor shaft and abuts against the magnetic steel; and the pushing mechanism is used for pushing the corresponding magnetic steels through the pushing parts, so that the magnetic steels are close to each other and abut against each other on the rotor shaft. The invention provides a device for positioning homopolar magnetic steel of a permanent magnet motor rotor, and aims to solve the problem of poor applicability of a positioning tool for bonding and fixing magnetic steel in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of motor equipment technology, specifically relating to a device for positioning magnets of the same polarity as the rotor of a permanent magnet motor. Background Technology

[0002] A high-power AC generator rotor typically consists of a shaft and magnets. The magnets are fitted around the outer circumference of the shaft and are glued to it. Permanent magnet motors use magnets of the same polarity (i.e., the same poles of the magnets facing the air gap) to form a parallel magnetic circuit. The magnetic lines of force "shorten" the path, primarily by forming a large loop in the stator yoke. For the rotor, the magnetic lines of force are "radial" inside the rotor, flowing directly from the N pole of the outer ring to the S pole of the inner ring (or directly from the S pole of the outer ring to the N pole of the inner ring), eliminating the need for a separate yoke loop for each pair of poles. This allows the rotor core to be made thinner and lighter.

[0003] In the prior art, the mutual repulsion of polarities between axially adjacent magnets makes it difficult to achieve a tight bond between them. Patent document WO2020143010A1 discloses a positioning fixture for bonding and fixing axially homopolar magnets in a rotor. This fixture can achieve rapid bonding of homopolar magnets to a certain extent, but it is only applicable to one type of rotor and can only fix a limited number of magnets, resulting in poor applicability. Summary of the Invention

[0004] This invention provides a device for positioning magnets of the same polarity as the rotor of a permanent magnet motor, which aims to solve the problem of poor applicability of positioning fixtures for bonding and fixing magnets in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a device for positioning magnets of the same polarity as the rotor of a permanent magnet motor, comprising: The tube section is provided at least once, and each tube section has a cavity; one tube section or multiple tube sections connected end to end can form a cylindrical structure, and one cavity or multiple combined cavities form a cylindrical cavity; the cylindrical cavity is used for the rotor shaft equipped with multiple magnets to pass through; Two end cap rings are provided, and each end cap ring is detachably connected to both ends of the cylindrical structure. A pushing mechanism is provided on one of the end cap rings and has a pushing part located in the cylinder cavity. The pushing part is arranged around the rotor shaft and abuts against the magnet. The pushing mechanism is used to push the corresponding magnet by the pushing part, so that the magnets move closer to each other and abut against each other on the rotor shaft.

[0006] In one possible implementation, both ends of the pipe section are provided with annular planes; each pipe section has a notch on its sidewall near the end that communicates with the lumen; an arc-shaped plane parallel to the annular plane is provided in the notch; and a perforation is provided between the arc-shaped plane and the corresponding annular plane. Each of the pipe sections is connected by bolts passing through the perforations.

[0007] In one possible implementation, the length direction of the cylindrical cavity is defined as a first direction; the pushing mechanism includes: The mounting components are detachably connected to the corresponding pipe sections; The movable rod is provided with at least two, each movable rod is arranged along the first direction, each movable rod is slidably connected to the mounting assembly, each movable rod is arranged annularly spaced around the axis of the cylinder cavity, and one end of each movable rod extends into the cylinder cavity and the other end is located outside the cylinder cavity; A push ring is connected to one end of each of the moving rods that extends into the cylinder cavity. The push ring is arranged around the rotor shaft and abuts against the magnet. The push ring is the push part. A drive assembly, connected to each of the movable rods, is used to drive each of the movable rods to move along the first direction; The end cap ring is provided with a first through hole for each of the moving rods to pass through.

[0008] In one possible implementation, the mounting assembly includes at least two mounting portions, each mounting portion corresponding to one of the movable rods: each mounting portion includes: The mounting plate is provided with a second through hole for the corresponding movable rod to pass through; A connecting rod, one end of which is fixedly connected to the mounting plate, and the other end of which extends along the first direction; the other end of the connecting rod is detachably connected to the corresponding pipe section. A locking element is used to lock and fix the connecting rod onto the pipe section.

[0009] In one possible implementation, each of the moving rods is a lead screw.

[0010] In one possible implementation, the driving component includes at least two driving units, each driving unit corresponding to one of the mounting units; each driving unit includes: A retaining ring is fixedly connected to the corresponding mounting plate; The rotating plate is rotatably connected to the fixed ring and threadedly connected to the moving rod; the outer circumference of the rotating plate is provided with a first annular toothed surface structure.

[0011] In one possible implementation, the rotating plate is connected to the fixed ring via a bearing.

[0012] In one possible implementation, the drive assembly further includes a turntable having a second annular toothed structure adapted to the first annular toothed structure, the turntable engaging with each of the rotating plates for transmission.

[0013] In one possible implementation, the turntable is provided with a handle.

[0014] In one possible implementation, the pushing mechanism further includes: An auxiliary ring is provided at a distance from the push ring, and the auxiliary ring is connected to one end of each of the moving rods that extends into the cylinder cavity; The slide rod is provided in at least two, and each slide rod is arranged circumferentially around the axis of the cylinder cavity. One end of each slide rod is slidably connected to the auxiliary ring, and the other end is connected to the push ring. The spring is provided in at least two, and each spring is arranged in a one-to-one correspondence with each slide rod. Each spring is respectively sleeved on the corresponding slide rod, and one end of each spring is connected to the auxiliary ring and the other end is connected to the push ring.

[0015] The beneficial effects of the device for positioning the same-polarity magnets of a permanent magnet motor rotor provided by this invention are as follows: Compared with the prior art, by setting tube sections, the number of tube sections can be set to at least one, thereby allowing the selection of the number of tube sections according to the number of magnets, resulting in good applicability. One tube section or multiple tube sections connected end-to-end can form a cylindrical structure. Each tube section has a cavity, and one cavity or the combined cavities form a cylindrical cavity. The cylindrical cavity is used for the rotor shaft, which houses multiple magnets, to pass through. Two end cap rings are provided, each detachably connected to both ends of the cylindrical structure, thereby limiting the rotor shaft through the end cap rings. A pushing mechanism is provided on one of the end cap rings, and the pushing mechanism has a pushing part located within the cylindrical cavity, surrounding the rotor shaft and abutting against the magnets. The pushing part pushes the corresponding magnets, causing each magnet to approach and abut against each other on the rotor shaft, thereby ensuring tight adhesion and bonding of the magnets, guaranteeing the quality of the bonding installation, and improving practicality. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the device for positioning the same polarity magnets of the permanent magnet motor rotor provided in an embodiment of the present invention. Figure 1 ; Figure 2 A schematic diagram of the structure of the device for positioning the same polarity magnets of the permanent magnet motor rotor provided in an embodiment of the present invention. Figure 2 ; Figure 3 A schematic diagram of the structure of the device for positioning the same polarity magnets of the permanent magnet motor rotor provided in an embodiment of the present invention. Figure 3 ; Figure 4 A schematic diagram of the structure of the device for positioning the same polarity magnets of the permanent magnet motor rotor provided in an embodiment of the present invention. Figure 4 .

[0017] Explanation of reference numerals in the attached figures: 10. Pipe section; 11. Notch; 12. Bolt; 20. End cap ring; 30. Pushing mechanism; 31. Mounting assembly; 311. Mounting plate; 312. Connecting rod; 32. Moving rod; 33. Pushing ring; 34. Drive assembly; 341. Fixing ring; 342. Rotating plate; 3421. First annular toothed surface structure; 343. Bearing; 344. Turntable; 3441. Second annular toothed surface structure; 345. Handle; 35. Auxiliary ring; 36. Spring; 40. Magnet; 50. Rotor shaft. Detailed Implementation

[0018] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0019] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0020] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0022] Please refer to the following: Figures 1 to 4 The present invention will now describe the device for positioning the same-polarity magnets of a permanent magnet motor rotor. The device for positioning the same-polarity magnets of a permanent magnet motor rotor includes a tube section 10, an end cap ring 20, and a pushing mechanism 30. At least one tube section 10 is provided, and each tube section 10 has a cavity. One tube section 10 or multiple tube sections 10 connected end-to-end can form a cylindrical structure. One cavity or a combination of cavities forms a cylindrical cavity. The cylindrical cavity is used for the rotor shaft 50, which is equipped with multiple magnets 40, to pass through. Two end cap rings 20 are provided, and the two end cap rings 20 are detachably connected to both ends of the cylindrical structure. The pushing mechanism 30 is provided on one of the end cap rings 20 and has a pushing part located within the cylindrical cavity. The pushing part is arranged around the rotor shaft 50 and abuts against the magnets 40. The pushing mechanism 30 is used to push the corresponding magnets 40 by the pushing part, so that the magnets 40 move closer to each other and abut against each other on the rotor shaft 50.

[0023] In this embodiment, at least one pipe section 10 is provided, and one or more pipe sections 10 connected end to end can form a cylindrical structure. Each pipe section 10 has a cavity, and one cavity or the combined cavities form a cylindrical cavity. The cylindrical cavity is used for the rotor shaft 50, which is equipped with multiple magnets 40, to pass through. Two end cap rings 20 are provided, and each end cap ring 20 is detachably connected to both ends of the cylindrical structure. A pushing mechanism 30 is provided on one of the end cap rings 20. The pushing mechanism 30 has a pushing part located inside the cylindrical cavity. The pushing part is arranged around the rotor shaft 50 and abuts against the magnets 40. By pushing the corresponding magnets 40, the magnets 40 are brought closer to each other and abut against each other on the rotor shaft 50.

[0024] The device for positioning the same-polarity magnets of a permanent magnet motor rotor provided in this embodiment of the invention, compared with the prior art, has good applicability by setting tube sections 10, with at least one tube section 10, so that the number of tube sections 10 can be selected according to the number of magnets 40. One tube section 10 or multiple tube sections 10 connected end to end can form a cylindrical structure. Each tube section 10 has a cavity, and one cavity or the combination of cavities forms a cylindrical cavity. The cylindrical cavity is used for the rotor shaft 50, which is equipped with multiple magnets 40, to pass through. Two end cap rings 20 are provided, and the two end cap rings 20 are detachably connected to both ends of the cylindrical structure, thereby limiting the rotor shaft 50 through the end cap rings 20. A pushing mechanism 30 is provided on one of the end cap rings 20. The pushing mechanism 30 has a pushing part located in the cylindrical cavity, which is arranged around the rotor shaft 50 and abuts against the magnets 40. The jacking part pushes the corresponding magnet 40, so that each magnet 40 is close to and abuts against each other on the rotor shaft 50, thereby ensuring that each magnet 40 is tightly attached and bonded, ensuring the quality of the bonding and installation, and having good practicality.

[0025] A permanent magnet synchronous motor (PMSM) is a synchronous motor that uses permanent magnets to generate a magnetic field. The rotor's rotational speed is synchronized with the frequency of the current in the stator windings. A PMSM consists of a stator, rotor, and end covers. The operating principle of a PMSM is based on the interaction between the rotating magnetic field generated by the stator and the magnetic field generated by the permanent magnets on the rotor. The rotor is equipped with pre-magnetized permanent magnets, which generate a strong magnetic field when rotating, thus providing greater output torque. The motor's control system precisely regulates the current to ensure that the motor rotor rotates synchronously with the rotating magnetic field, maintaining a stable operating state.

[0026] Permanent magnet motors are a widely used type of motor, with advantages such as high efficiency, good dynamic response performance, and low noise.

[0027] In some embodiments, please refer to Figures 1 to 4 Both ends of the tube section 10 are provided with annular planes. Each tube section 10 has a notch 11 on its side wall near the end, communicating with the tube cavity. An arc-shaped plane parallel to the annular plane is provided in the notch 11. A through hole is provided between the arc-shaped plane and the corresponding annular plane. Each tube section 10 is connected by bolts 12 passing through the through holes. In this embodiment, both ends of the tube section 10 are provided with annular planes. Specifically, the opening of the annular plane is sufficient for the rotor shaft 50 and magnet 40 to pass through, and the annular plane does not restrict the rotor shaft 50 and magnet 40. Each tube section 10 has a notch 11 on its side wall near the end, and the notch 11 communicates with the tube cavity. An arc-shaped plane is provided in the notch 11, parallel to the annular plane. A through hole is provided between the arc-shaped plane and the corresponding annular plane. Bolt 12 has a threaded rod. After the threaded rod of bolt 12 passes through the through hole, the position of bolt 12 is locked and fixed by nut, so as to prevent the two adjacent pipe sections 10 from breaking apart during the process of the jacking part pushing the magnet 40, thus ensuring stability.

[0028] In some embodiments, please refer to Figures 1 to 4The length direction of the cylinder cavity is set as the first direction. The jacking mechanism 30 includes a mounting assembly 31, moving rods 32, a jacking ring 33, and a drive assembly 34. The mounting assembly 31 is detachably connected to the corresponding pipe section 10. At least two moving rods 32 are provided, each moving rod 32 is arranged along the first direction, each moving rod 32 is slidably connected to the mounting assembly 31, and each moving rod 32 is arranged annularly spaced around the axis of the cylinder cavity. One end of each moving rod 32 extends into the cylinder cavity, and the other end is located outside the cylinder cavity. The jacking ring 33 is connected to the end of each moving rod 32 that extends into the cylinder cavity. The jacking ring 33 is arranged around the rotor shaft 50 and abuts against the magnet 40. The jacking ring 33 is the jacking part. The drive assembly 34 is connected to each moving rod 32 and is used to drive each moving rod 32 to move along the first direction. The end cap ring 20 is provided with a first through hole for each moving rod 32 to pass through. In this embodiment, the mounting assembly 31 is detachably connected to the corresponding pipe section 10. At least two movable rods 32 are provided, each arranged along a first direction. One end of each movable rod 32 extends into the cylinder cavity, and the other end is located outside the cylinder cavity. A push ring 33 is connected to the end of each movable rod 32 that extends into the cylinder cavity. The push ring 33 is arranged around the rotor shaft 50. A drive assembly 34 is connected to each movable rod 32 and is used to drive each movable rod 32 to move along the first direction. Thus, the movable rods 32 drive the push ring 33 to move, so that the push ring 33 abuts against the magnet 40, ensuring that the magnet 40 is in close contact. The mounting assembly 31 is detachably connected to the corresponding pipe section 10. Each movable rod 32 is arranged annularly at intervals around the axis of the cylinder cavity, and each movable rod 32 is slidably connected to the mounting assembly 31, thereby ensuring that each movable rod 32 provides a stable push to the push ring 33.

[0029] In some embodiments, please refer to Figures 1 to 4 The mounting assembly 31 includes at least two mounting portions, each corresponding to a moving rod 32. Each mounting portion includes a mounting plate 311, a connecting rod 312, and a locking element. The mounting plate 311 has a second through hole through which the corresponding moving rod 32 passes. One end of the connecting rod 312 is fixedly connected to the mounting plate 311, and the other end extends along a first direction. The other end of the connecting rod 312 is detachably connected to the corresponding pipe section 10. The locking element is used to lock the connecting rod 312 onto the pipe section 10. In this embodiment, one end of the connecting rod 312 is fixedly connected to the mounting plate 311, and the other end extends along the first direction and is detachably connected to the corresponding pipe section 10. The locking element locks the connecting rod 312 onto the pipe section 10. There is a gap between the locking element and the magnet 40 in the cylinder cavity, so it will not limit or damage the magnet 40 in the cylinder cavity.

[0030] In some embodiments, please refer to Figure 1 Each of the moving rods 32 is a lead screw.

[0031] In some embodiments, please refer to Figures 1 to 4The drive assembly 34 includes at least two drive units, each corresponding to a mounting unit. Each drive unit includes a fixed ring 341 and a rotating plate 342. The fixed ring 341 is fixedly connected to the corresponding mounting plate 311. The rotating plate 342 is rotatably connected to the fixed ring 341 and threadedly connected to the moving rod 32. The outer periphery of the rotating plate 342 is provided with a first annular toothed surface structure 3421. In this embodiment, the fixed ring 341 is fixedly connected to the corresponding mounting plate 311, the rotating plate 342 is rotatably connected to the fixed ring 341, and threadedly connected to the moving rod 32, thereby driving the moving rod 32 to move along a first direction via the rotating plate 342.

[0032] Specifically, the movable rod 32 is a lead screw, and the rotating plate 342 is provided with a threaded hole that is compatible with the movable rod 32.

[0033] In some embodiments, please refer to Figure 4 The rotating plate 342 and the fixed ring 341 are connected by a bearing 343. Specifically, the bearing 343 can be a thrust bearing 343.

[0034] In some embodiments, please refer to Figures 1 to 3 The drive assembly 34 also includes a turntable 344, which has a second annular toothed surface structure 3441 adapted to the first annular toothed surface structure 3421. The turntable 344 meshes with each rotating plate 342 for transmission. In this embodiment, the turntable 344 has a second annular toothed surface structure 3441, and the turntable 344 meshes with each rotating plate 342 for transmission, thereby driving each rotating plate 342 to rotate by rotating the turntable 344.

[0035] In some embodiments, please refer to Figure 1 and Figure 3 The turntable 344 is equipped with a handle 345, which makes it easy for the operator to hold the handle 345 to drive the turntable 344 to rotate.

[0036] In some embodiments, please refer to Figure 4The jacking mechanism 30 also includes an auxiliary ring 35, sliding rods, and springs 36. The auxiliary ring 35 is spaced apart from the jacking ring 33, and is connected to one end of each moving rod 32 that extends into the cylinder cavity. At least two sliding rods are provided, spaced annularly around the axis of the cylinder cavity. One end of each sliding rod is slidably connected to the auxiliary ring 35, and the other end is connected to the jacking ring 33. At least two springs 36 are provided, each corresponding to one of the sliding rods. Each spring 36 is sleeved on its corresponding sliding rod, with one end connected to the auxiliary ring 35 and the other end connected to the jacking ring 33. In this embodiment, the auxiliary ring 35 is connected to one end of each moving rod 32 that extends into the cylinder cavity, and the auxiliary ring 35 is spaced apart from the jacking ring 33. At least two sliding rods are provided between the auxiliary ring 35 and the jacking rods, spaced annularly around the axis of the cylinder cavity. One end of each sliding rod is slidably connected to the auxiliary ring 35, and the other end is connected to the jacking ring 33. Furthermore, springs 36 are respectively fitted on each sliding rod. One end of the spring 36 is connected to the auxiliary ring 35, and the other end is connected to the push ring 33. Thus, after the magnet 40 is pushed tightly by the push ring 33, the spring 36 is in a compressed state and tends to return to its natural state. This ensures that the push ring 33 always has a pressing force on the magnet 40, thus guaranteeing the bonding quality of the magnet 40.

[0037] One specific embodiment of this application is as follows: The jacking mechanism 30 includes a mounting assembly 31, a moving rod 32, a jacking ring 33, and a driving assembly 34. The mounting assembly 31 is detachably connected to the corresponding pipe section 10. Two moving rods 32 are provided, each moving rod 32 is arranged along a first direction, and each moving rod 32 is slidably connected to the mounting assembly 31. The two moving rods 32 are arranged radially spaced along the cylinder cavity, with one end of each moving rod 32 extending into the cylinder cavity and the other end located outside the cylinder cavity. The jacking ring 33 is connected to the end of each moving rod 32 that extends into the cylinder cavity. The jacking ring 33 is arranged around the rotor shaft 50 and abuts against the magnet 40. The jacking ring 33 is the jacking part. The driving assembly 34 is connected to each moving rod 32 and is used to drive each moving rod 32 to move along the first direction. The end cap ring 20 is provided with a first through hole for each moving rod 32 to pass through. In this embodiment, the mounting assembly 31 is detachably connected to the corresponding pipe section 10. Two movable rods 32 are provided, each arranged along a first direction. One end of each movable rod 32 extends into the cylinder cavity, and the other end is located outside the cylinder cavity. A push ring 33 is connected to the end of each movable rod 32 that extends into the cylinder cavity. The push ring 33 is arranged around the rotor shaft 50. A drive assembly 34 is connected to each movable rod 32 and is used to drive each movable rod 32 to move along the first direction. Thus, the movable rods 32 drive the push ring 33 to move, so that the push ring 33 abuts against the magnet 40, ensuring that the magnet 40 is in close contact. The mounting assembly 31 is detachably connected to the corresponding pipe section 10. Each movable rod 32 is slidably connected to the mounting assembly 31, thereby ensuring that each movable rod 32 provides a stable push to the push ring 33.

[0038] In some embodiments, please refer to Figures 1 to 4 The mounting assembly 31 includes two mounting parts, each corresponding to one of the two movable rods 32. Each mounting part includes a mounting plate 311, a connecting rod 312, and a locking element. The mounting plate 311 has a second through hole through which the corresponding movable rod 32 passes. One end of the connecting rod 312 is fixedly connected to the mounting plate 311, and the other end extends along a first direction. The other end of the connecting rod 312 is detachably connected to the corresponding pipe section 10. The locking element is used to lock the connecting rod 312 onto the pipe section 10. In this embodiment, one end of the connecting rod 312 is fixedly connected to the mounting plate 311, and the other end extends along the first direction and is detachably connected to the corresponding pipe section 10. The locking element locks the connecting rod 312 onto the pipe section 10. There is a gap between the locking element and the magnet 40 in the cylinder cavity, so it will not limit or damage the magnet 40 in the cylinder cavity.

[0039] In some embodiments, please refer to Figure 1 Each of the moving rods 32 is a lead screw.

[0040] In some embodiments, please refer to Figures 1 to 4 The drive assembly 34 includes two drive units, each corresponding to one of the two mounting units. Each drive unit includes a fixed ring 341 and a rotating plate 342. The fixed ring 341 is fixedly connected to the corresponding mounting plate 311. The rotating plate 342 is rotatably connected to the fixed ring 341 and threadedly connected to the moving rod 32. The outer periphery of the rotating plate 342 is provided with a first annular toothed surface structure 3421. In this embodiment, the fixed ring 341 is fixedly connected to the corresponding mounting plate 311, the rotating plate 342 is rotatably connected to the fixed ring 341, and threadedly connected to the moving rod 32, thereby driving the moving rod 32 to move along a first direction via the rotating plate 342.

[0041] Specifically, the movable rod 32 is a lead screw, and the rotating plate 342 is provided with a threaded hole that is compatible with the movable rod 32.

[0042] In some embodiments, please refer to Figure 4 The rotating plate 342 and the fixed ring 341 are connected by a bearing 343. Specifically, the bearing 343 can be a thrust bearing 343.

[0043] In some embodiments, please refer to Figures 1 to 3 The drive assembly 34 also includes a turntable 344, which has a second annular toothed surface structure 3441 adapted to the first annular toothed surface structure 3421. The turntable 344 meshes with each rotating plate 342 for transmission. In this embodiment, the turntable 344 has a second annular toothed surface structure 3441, and the turntable 344 meshes with each rotating plate 342 for transmission, thereby driving each rotating plate 342 to rotate by rotating the turntable 344.

[0044] In some embodiments, please refer to Figure 1 and Figure 3 The turntable 344 is equipped with a handle 345, which makes it easy for the operator to hold the handle 345 to drive the turntable 344 to rotate.

[0045] In some embodiments, please refer to Figure 4 The jacking mechanism 30 also includes an auxiliary ring 35, sliding rods, and springs 36. The auxiliary ring 35 is spaced apart from the jacking ring 33, and is connected to one end of each moving rod 32 that extends into the cylinder cavity. Two sliding rods are provided, spaced apart radially along the cylinder cavity. One end of each sliding rod is slidably connected to the auxiliary ring 35, and the other end is connected to the jacking ring 33. Two springs 36 are provided, corresponding to the two sliding rods respectively. Each spring 36 is sleeved on its corresponding sliding rod, with one end connected to the auxiliary ring 35 and the other end connected to the jacking ring 33. In this embodiment, the auxiliary ring 35 is connected to one end of each moving rod 32 that extends into the cylinder cavity, and the auxiliary ring 35 is spaced apart from the jacking ring 33. Two sliding rods are provided between the auxiliary ring 35 and the jacking rods, spaced apart radially along the cylinder cavity. One end of each sliding rod is slidably connected to the auxiliary ring 35, and the other end is connected to the jacking ring 33. Furthermore, springs 36 are respectively fitted on each sliding rod. One end of the spring 36 is connected to the auxiliary ring 35, and the other end is connected to the push ring 33. Thus, after the magnet 40 is pushed tightly by the push ring 33, the spring 36 is in a compressed state and tends to return to its natural state. This ensures that the push ring 33 always has a pressing force on the magnet 40, thus guaranteeing the bonding quality of the magnet 40.

[0046] One specific working process of this application is as follows: A suitable number of pipe sections 10 are selected based on the length of the rotor shaft 50 and the number of magnets 40. If there are multiple pipe sections 10, they are connected together using bolts 12 and nuts to form a cylindrical structure. An end cap ring 20 is installed at one end of the cylindrical structure, and then the rotor shaft 50 with the magnets 40 is installed in the cylindrical cavity. Each moving rod 32 is installed onto the mounting plate 311, and an auxiliary ring 35 is fixedly installed on the side of the moving rod 32 located in the cylindrical cavity. A sliding rod is slidably connected to the side of the auxiliary ring 35 away from the moving rod 32, and the sliding rod has a sliding hole adapted to the auxiliary ring 35. A spring 36 is sleeved on the sliding rod. A push ring 33 is fixedly connected to the other end of the sliding rod. The other end cap ring 20 is installed at the other end of the cylindrical structure. The connecting rod 312 is locked to the pipe section 10 using a locking device. A fixing ring 341 is fixedly connected to the mounting plate 311. The rotating plate 342 is connected to the fixing ring 341 through the bearing 343. Finally, the turntable 344 is installed. After all components are installed, the operator holds the handle 345 and rotates the turntable 344. The turntable 344 drives each rotating plate 342 to rotate. The rotating plate 342 is threadedly connected to the moving rod 32, thereby driving the moving rod 32 to move into the cylinder cavity until it abuts against the magnet 40. At this time, the spring 36 is in a compressed state and has a tendency to return to its natural state, so that the push ring 33 always has a pressing force on the magnet 40, ensuring the bonding quality of the magnet 40.

[0047] Permanent magnet motors use magnets of the same polarity (i.e., the same magnetic poles of the magnets facing the air gap) to form a "parallel magnetic circuit," which significantly increases the air gap magnetic flux density, thereby improving the motor's power density and torque density. A traditional opposite-polarity (series magnetic circuit) magnetic circuit works as follows: if one magnet has its N pole facing the air gap, and an adjacent magnet has its S pole facing the air gap, the path of the magnetic field lines is: from the N pole of the first magnet -> through the air gap into the stator core -> along the stator yoke -> through the air gap again -> back to the S pole of the adjacent magnet -> then through the rotor core back to the S pole of the first magnet. This forms a series magnetic circuit. The magnetomotive force (which can be understood as the magnetic "voltage") of all the magnets is superimposed in series, but the magnetic circuit is very long, requiring two crossings of the air gap and the entire stator yoke, resulting in higher magnetic reluctance. More importantly, for the magnetic circuit inside the rotor, each pair of magnetic poles needs to provide a complete loop path for the magnetic field lines, requiring a thicker rotor core yoke, increasing the rotor's size and weight.

[0048] Same polarity (parallel magnetic circuit): If all magnets have their N poles facing the air gap (in practice, all S poles can also face outwards), then the path of the magnetic field lines is: from the N poles of all magnets -> through the air gap into the stator core -> forming a loop in the stator yoke (because the stator core is magnetically conductive) -> through the air gap again -> back to the S poles of all magnets (the S poles are all installed inside the rotor core). This forms a parallel magnetic circuit. The magnetic field lines "shorten" the path, mainly by forming a large loop in the stator yoke. For the rotor, the magnetic field lines are "radial" inside the rotor, flowing directly from the N poles of the outer ring to the S poles of the inner ring, eliminating the need for a separate yoke loop for each pair of poles. This allows the rotor core to be made thinner and lighter.

[0049] The main advantages of parallel magnetic circuits (parallel magnetic circuits) with magnets of the same polarity are high air gap magnetic flux density, high power / torque density, and a simple and robust rotor structure. High air gap magnetic flux density, due to the shortened magnetic circuit and reduced magnetic reluctance, allows more magnetic flux to be "driven" into the air gap, resulting in a stronger magnetic field within the same volume and magnet quantity. This means the motor can output greater torque. High power / torque density, with a higher air gap magnetic flux density and a lighter rotor, enables the motor to achieve greater power and torque output within the same volume and weight, which is crucial for industries seeking lightweight and high-performance applications. The simple and robust rotor structure, requiring less thick yokes for the rotor core, allows for hollow cup or disc structures, resulting in low inertia and facilitating rapid motor start-up and speed regulation.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for positioning magnets of the same polarity as the rotor of a permanent magnet motor, characterized in that, include: The tube section is provided at least once, and each tube section has a cavity; one tube section or multiple tube sections connected end to end can form a cylindrical structure, and one cavity or multiple combined cavities form a cylindrical cavity; the cylindrical cavity is used for the rotor shaft equipped with multiple magnets to pass through; Two end cap rings are provided, and each end cap ring is detachably connected to both ends of the cylindrical structure. A pushing mechanism is provided on one of the end cap rings and has a pushing part located in the cylinder cavity. The pushing part is arranged around the rotor shaft and abuts against the magnet. The pushing mechanism is used to push the corresponding magnet by the pushing part, so that the magnets move closer to each other and abut against each other on the rotor shaft.

2. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 1, characterized in that, Both ends of the pipe section are provided with annular planes; each pipe section has a notch on its side wall near the end that connects to the lumen; an arc-shaped plane parallel to the annular plane is provided in the notch; a through hole is provided between the arc-shaped plane and the corresponding annular plane; Each of the pipe sections is connected by bolts passing through the perforations.

3. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 2, characterized in that, The length direction of the cylindrical cavity is defined as the first direction; the pushing mechanism includes: The mounting components are detachably connected to the corresponding pipe sections; The movable rod is provided with at least two, each movable rod is arranged along the first direction, each movable rod is slidably connected to the mounting assembly, each movable rod is arranged annularly spaced around the axis of the cylinder cavity, and one end of each movable rod extends into the cylinder cavity and the other end is located outside the cylinder cavity; A push ring is connected to one end of each of the moving rods that extends into the cylinder cavity. The push ring is arranged around the rotor shaft and abuts against the magnet. The push ring is the push part. A drive assembly, connected to each of the movable rods, is used to drive each of the movable rods to move along the first direction; The end cap ring is provided with a first through hole for each of the moving rods to pass through.

4. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 3, characterized in that, The mounting assembly includes at least two mounting parts, each mounting part corresponding to one of the movable rods: each mounting part includes: The mounting plate is provided with a second through hole for the corresponding movable rod to pass through; A connecting rod, one end of which is fixedly connected to the mounting plate, and the other end of which extends along the first direction; the other end of the connecting rod is detachably connected to the corresponding pipe section. A locking element is used to lock and fix the connecting rod onto the pipe section.

5. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 4, characterized in that, All of the aforementioned moving rods are lead screws.

6. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 5, characterized in that, The driving assembly includes at least two driving units, each driving unit corresponding to one of the mounting units; each driving unit includes: A retaining ring is fixedly connected to the corresponding mounting plate; The rotating plate is rotatably connected to the fixed ring and threadedly connected to the moving rod; the outer circumference of the rotating plate is provided with a first annular toothed surface structure.

7. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 6, characterized in that, The rotating plate and the fixed ring are connected by a bearing.

8. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 6, characterized in that, The drive assembly also includes a turntable, which has a second annular toothed surface structure adapted to the first annular toothed surface structure, and the turntable engages with each of the rotating plates for transmission.

9. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 8, characterized in that, The turntable is equipped with a handle.

10. The device for positioning magnets of the same polarity as the rotor of a permanent magnet motor as described in claim 3, characterized in that, The pushing mechanism also includes: An auxiliary ring is provided at a distance from the push ring, and the auxiliary ring is connected to one end of each of the moving rods that extends into the cylinder cavity; The slide rod is provided in at least two, and each slide rod is arranged circumferentially around the axis of the cylinder cavity. One end of each slide rod is slidably connected to the auxiliary ring, and the other end is connected to the push ring. The spring is provided in at least two, and each spring is arranged in a one-to-one correspondence with each slide rod. Each spring is respectively sleeved on the corresponding slide rod, and one end of each spring is connected to the auxiliary ring and the other end is connected to the push ring.

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