Combined rotor pole structure, traction machine

Abstract

The utility model discloses a combined rotor magnetic pole structure, tractor belongs to the technical field of tractor, among them, including magnetic attraction subassembly, support subassembly, magnetic attraction subassembly includes first magnetic attraction spare, at least two second magnetic attraction spare, support subassembly includes support frame, and support frame has the mouth, and the number of mouth corresponds with the number of second magnetic attraction spare, and the one end of each second magnetic attraction spare passes through the mouth and is fixedly connected with first magnetic attraction spare, the outer wall of second magnetic attraction spare and the inner wall of support frame abut, and support frame is located between second magnetic attraction spare and first magnetic attraction spare, and each second magnetic attraction spare has the joint surface, and first magnetic attraction spare has the action surface, and the joint surface sets up away from the action surface. The second magnetic attraction spare is divided into at least two pieces to process, and first magnetic attraction spare and second magnetic attraction spare are made of different materials, reduce the use amount of rare earth, reduce production cost. The outer wall of each second magnetic attraction spare is supported by the support frame, and the integrity between second magnetic attraction spare, first magnetic attraction spare and support frame is increased.

Description

Technical Field

[0001] This utility model relates to the technical field of traction machines, and in particular to a combined rotor magnetic pole structure and a traction machine. Background Technology

[0002] Permanent magnet synchronous motors (PMSMs) are widely used in various fields due to their simple structure, stable performance, high efficiency, and high power factor. The permanent magnet is one of the core components of a PMSM, and its importance is self-evident. Each rotor pole consists of a permanent magnet, and several rotor poles are evenly distributed and fixed to the inner cylindrical surface of the rotor yoke through a circumferentially connected joint surface. Rare-earth permanent magnets, with their superior and stable magnetic properties, are widely used in modern PMSM designs; however, the high price of rare-earth permanent magnet materials results in high material costs for permanent magnets.

[0003] Furthermore, the semi-finished products of permanent magnet materials are generally rectangular in shape, and are cut into shape according to the cross-sectional shape of the permanent magnet from a rectangular face perpendicular to it during finishing. Because the auxiliary parts of the permanent magnet deviate from the rectangular shape of its cross-section, the proportion of waste material increases during finishing, reducing the utilization rate of raw materials. Utility Model Content

[0004] The purpose of this invention is to improve the existing rotor magnetic poles, which use integrated rare earth permanent magnets, resulting in high costs and a large proportion of waste material during cutting. This invention provides a combined rotor magnetic pole structure and a traction machine.

[0005] The technical solutions for achieving the above objectives include the following:

[0006] A combined rotor magnetic pole structure includes: a magnetic attraction assembly and a support assembly. The magnetic attraction assembly includes a first magnetic attraction element and at least two second magnetic attraction elements. The support assembly includes a support frame with openings. The number of openings corresponds to the number of second magnetic attraction elements. One end of each second magnetic attraction element passes through the opening and is fixedly connected to the first magnetic attraction element. The outer wall of each second magnetic attraction element abuts against the inner wall of the support frame. The support frame is located between the second magnetic attraction elements and the first magnetic attraction elements.

[0007] Each of the second magnetic attractors has a mating surface, and the first magnetic attractor has a working surface, with the mating surface and the working surface being disposed opposite to each other.

[0008] In one embodiment, the support assembly further includes at least one set of abutting members, each set of abutting members including two abutting blocks, the two abutting blocks being respectively installed on both sides of the support frame, and the inner wall of the abutting block abutting against the side wall of the first magnetic member.

[0009] In one embodiment, the second magnetic attractor has four pieces, which are arranged in an array. Two of the second magnetic attractors are arranged vertically with the other two second magnetic attractors and form a junction. The installation position of the abutment corresponds to the junction.

[0010] In one embodiment, the second magnetic element has multiple pieces, and the multiple second magnetic elements are distributed in an array.

[0011] In one embodiment, the first magnetic attractor has a first adhesive surface that is opposite to the working surface, and the second magnetic attractor has a second adhesive surface that is opposite to the mating surface. The first adhesive surface and the second adhesive surface are bonded and fixed together.

[0012] In one embodiment, both the first and second adhesive surfaces are planar. After the two second magnetic components are joined together, the two joint surfaces of the two second magnetic components form an arch shape and protrude away from the support frame. The working surface of the first magnetic component also protrudes away from the support frame.

[0013] In one embodiment, the cross-section of the abutting block is bent, the abutting block has a connecting surface and an abutting surface, the connecting surface is fixedly connected to the outer wall of the support frame, and the abutting surface abuts against the side wall of the first magnetic member.

[0014] In one embodiment, the width of the abutting surface is greater than the width of the sidewall of the first magnetic member, and the abutting surface is aligned with the sidewall of the first magnetic member.

[0015] In one embodiment, the first magnetic attractor is made of a magnetically conductive material, and the second magnetic attractor is made of a permanent magnet material.

[0016] This utility model also proposes a traction machine, including a rotor, a stator, and a combined rotor magnetic pole structure as described above. The rotor is sleeved outside the stator, and there is a gap between the rotor and the stator. The combined rotor magnetic pole structure has multiple components, all of which are installed on the inner side of the rotor and distributed along the circumference of the rotor. All of the combined rotor magnetic pole structures are located within the gap.

[0017] The technical solution provided by this utility model has the following advantages and effects:

[0018] On the one hand, since the magnetic absorbing assembly consists of a first magnetic absorbing component and at least two second magnetic absorbing components, the two components can be made of different materials. Only the second magnetic absorbing components are made of permanent magnet material, which can significantly reduce the amount of rare earth used and lower material costs. Moreover, the magnetic absorbing assembly is composed of a first magnetic absorbing component and at least two second magnetic absorbing components. One end of the second magnetic absorbing component passes through the support frame opening and is fixedly connected to the first magnetic absorbing component. The support frame supports the outer wall of each second magnetic absorbing component, which can improve the stability of the second magnetic absorbing component and the support frame and increase the overall integrity between the second magnetic absorbing component, the first magnetic absorbing component, and the support frame.

[0019] On the other hand, the magnetic chuck assembly consists of a first magnetic chuck and a second magnetic chuck. Only the second magnetic chuck uses permanent magnet material, and its shape is closer to that of the rare earth semi-finished raw material. Therefore, the waste generated after cutting the semi-finished raw material into the second magnetic chuck is significantly less than that generated during the overall processing. This effectively improves the utilization rate of rare earth raw materials. Moreover, since the second magnetic chuck is divided into multiple pieces, the volume of each piece is smaller, reducing the requirements for cutting and magnetization equipment and lowering the difficulty of production. Attached Figure Description

[0020] The accompanying drawings illustrate specific examples of the technical solutions described in this utility model, and together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this utility model.

[0021] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

[0022] Figure 1 This is a schematic diagram of the combined rotor magnetic pole structure in one embodiment of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the combined rotor magnetic pole structure in one embodiment of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of a support component in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a conventional raw material processing magnetic suction component in one embodiment of the present invention;

[0026] Figure 5a This is a schematic diagram of the raw material processing of the second magnetic component in one embodiment of the present invention. Figure 1 ;

[0027] Figure 5b This is a schematic diagram of the raw material processing of the second magnetic component in one embodiment of the present invention. Figure 2 ;

[0028] Figure 6 This is a schematic diagram of a traction machine in one embodiment of the present invention;

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Combined rotor magnetic pole structure; 1. Magnetic attraction assembly; 11. Second magnetic attraction component; 111. Joint surface; 12. First magnetic attraction component; 121. Working surface; 122. Side wall; 123. First bonding surface; 13. Junction; 2. Support assembly; 21. Support frame; 211. Through port; 22. Abutment block; 221. Connecting surface; 222. Abutment surface; 3. Raw material; 31. Waste material; 200. Traction machine; 201. Rotor; 202. Stator. Detailed Implementation

[0031] To facilitate understanding of this utility model, specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0032] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0033] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0034] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

[0035] This utility model proposes a combined rotor magnetic pole structure 100, such as... Figures 1 to 3As shown, the device includes a magnetic suction assembly 1 and a support assembly 2. The magnetic suction assembly 1 includes a first magnetic suction element 12 and at least two second magnetic suction elements 11. The support assembly 2 includes a support frame 21 with openings 211. The number of openings 211 corresponds to the number of second magnetic suction elements 11. One end of each second magnetic suction element 11 passes through the opening 211 and is fixedly connected to the first magnetic suction element 12. The outer wall of the second magnetic suction element 11 abuts against the inner wall of the support frame 21. The support frame 21 is located between the second magnetic suction elements 11 and the first magnetic suction elements 12. Each second magnetic suction element 11 has a mating surface 111, and the first magnetic suction element 12 has a working surface 121. The mating surface 111 and the working surface 121 are disposed opposite to each other.

[0036] Specifically, this magnetic chuck assembly 1 is used to fix itself onto the rotor 201 and acts on the winding coils of the stator 202. The magnetic chuck assembly 1 consists of a first magnetic chuck 12 and at least two second magnetic chucks 11. One end of each second magnetic chuck 11 passes through a through-hole 211 and is fixedly connected to the first magnetic chuck 12. A support frame 21 supports the two second magnetic chucks 11, improving the stability of the second magnetic chucks 11 on the support frame 21. The second magnetic chucks 11 are processed in at least two pieces. The first magnetic chuck 12 and the second magnetic chucks 11 are made of different materials, with only the second magnetic chucks 11 using permanent magnet material. This reduces the amount of rare earth used and lowers production costs. Moreover, by using the support frame 21 to support the outer wall of each second magnetic chuck 11, the stability of the second magnetic chuck 11 and the support frame 21 can be improved, increasing the overall integrity between the second magnetic chuck 11, the first magnetic chuck 12, and the support frame 21.

[0037] Furthermore, in contrast, traditional cases, during processing, such as Figure 4 As shown, if the magnetic attraction component 1 is processed as a whole, the raw material 3 will generate a considerable amount of waste material 31 after being processed into multiple magnetic attraction components 1. In this utility model, as Figure 5a and Figure 5b As shown, the magnetic component 1 is processed into a first magnetic component 12 and a second magnetic component 11. The second magnetic component 11 is processed as a separate structure. After the raw material 3 is cut into multiple pieces of the second magnetic component 11, the waste material 31 generated is significantly less than that generated by the overall processing. Figure 5a This is an example where the width of the magnetic component 1 is a second magnetic element 11. Figure 5b This is an example of two second magnetic components 11 in the width direction of the magnetic component 1, and so on. Therefore, splitting the magnetic component 1 into a first magnetic component 12 and a second magnetic component 11 can solve the problem of a high proportion of waste material 31 when cutting and processing the original material 3 into a one-piece magnetic component 1. Moreover, after the second magnetic component 11 is divided into multiple pieces, the volume of each piece becomes smaller, the requirements for cutting and magnetizing equipment are lower, and the manufacturing difficulty is reduced.

[0038] Preferably, the support assembly 2 further includes at least one set of abutting members. Each set of abutting members includes two abutting blocks 22, which are respectively installed on both sides of the support frame 21, and the inner wall of the abutting block 22 abuts against the side wall 122 of the first magnetic attractor 12. Specifically, the two abutting blocks 22 are fixed to the support frame 21 and form an integral support structure with the support frame 21. The inner wall of the two abutting blocks 22 is used to abut against the side wall 122 of the first magnetic attractor 12, which can improve the stability of the first magnetic attractor 12 on the support frame 21. Therefore, by fixing and supporting the second magnetic attractor 11 and the first magnetic attractor 12 respectively through the support frame 21 and the abutting members, the overall structural stability of the combined rotor magnetic pole structure 100 is improved.

[0039] Preferably, there are four second magnetic attractors 11 arranged in an array. Two of the second magnetic attractors 11 are arranged vertically with the other two, forming a junction 13. The mounting position of the abutment corresponds to the junction 13. Specifically, since the two second magnetic attractors 11 are arranged vertically with the other two, the connection at the junction 13 is relatively weak. The abutment block 22 is placed at the junction 13. The abutment block 22 improves the connection stability between the first magnetic attractor 12 and the support frame 21, while the support frame 21 fixes the second magnetic attractor 11, further improving the overall structural stability of the combined rotor magnetic pole structure 100.

[0040] Preferably, there are multiple second magnetic attractors 11, which are arranged in an array. Specifically, the multiple second magnetic attractors 11 are arranged in an array so that the multiple openings 211 of the support frame 21 correspond to the multiple second magnetic attractors 11, and the support frame 21 simultaneously supports or fixes the multiple second magnetic attractors 11, further improving the overall structural stability of the combined rotor magnetic pole structure 100.

[0041] Preferably, the first magnetic attractor 12 has a first adhesive surface 123, which is opposite to the working surface 121. The second magnetic attractor 11 has a second adhesive surface, which is opposite to the mating surface 111. The first adhesive surface 123 and the second adhesive surface are bonded and fixed together. Specifically, the first adhesive surface 123 of the first magnetic attractor 12 is bonded and fixed to the second adhesive surface of the second magnetic attractor 11 with adhesive. The mating surface 111 of the second magnetic attractor 11 is bonded and fixed to the rotor 201 with adhesive. The first adhesive surface 123 is opposite to the working surface 121. The working surface 121 of the first magnetic attractor 12 has a magnetic attraction with the windings on the stator 202, so that the rotor 201 rotates around the stator 202.

[0042] In some embodiments, both the first adhesive surface 123 and the second adhesive surface are planar. After the two second magnetic components 11 are spliced ​​together, the two joint surfaces 111 of the two second magnetic components 11 form an arch shape and protrude away from the support frame 21. The working surface 121 of the first magnetic component 12 also protrudes away from the support frame 21.

[0043] Specifically, the two mating surfaces 111 of the two second magnetic accumulators 11 form an arch shape, which is used to fit against the inner arc surface of the rotor 201, increasing the connection area between the combined rotor magnetic pole structure 100 and the rotor 201. The working surface 121 of the first magnetic accumulator 12 also protrudes away from the support frame 21, which is used to increase the working area of ​​the combined rotor magnetic pole structure 100 and improve the working efficiency between the rotor 201 and the stator 202.

[0044] Preferably, the cross-section of the abutment block 22 is bent. The abutment block 22 has a connecting surface 221 and an abutment surface 222. The connecting surface 221 is fixedly connected to the outer wall of the support frame 21, and the abutment surface 222 abuts against the side wall 122 of the first magnetic attractor 12. Specifically, the abutment block 22 is fixed to the support frame 21 through the connecting surface 221, and the abutment surface 222 is fixed to the first magnetic attractor 12, thereby increasing the connection stability between the first magnetic attractor 12 and the support frame 21.

[0045] Preferably, the width of the abutment surface 222 is greater than the width of the side wall 122 of the first magnetic attractor 12, and the abutment surface 222 is aligned with the side wall 122 of the first magnetic attractor 12. Specifically, the width of the abutment surface 222 is greater than the width of the side wall 122 of the first magnetic attractor 12, so that the abutment surface 222 completely abuts against the side wall 122 of the first magnetic attractor 12, increasing the abutment area; while the abutment surface 222 is aligned with the side wall 122 of the first magnetic attractor 12 to prevent the abutment block 22 from blocking the working surface 121 of the first magnetic attractor 12, thus avoiding affecting the magnetic conductivity of the first magnetic attractor 12.

[0046] Preferably, the first magnetic attractor 12 is made of a magnetically conductive material, and the second magnetic attractor 11 is made of a permanent magnet material. Specifically, the second magnetic attractor 11 is made of a permanent magnet material, such as rare earth, to generate a magnetic field; while the first magnetic attractor 12, which is used to transmit the magnetic field and improve the shape of the air gap, is made of a non-permanent magnet material with magnetically conductive properties. The magnetically conductive material can be silicon steel sheet, carbon steel, or cast iron, etc.

[0047] like Figure 6As shown, this utility model also includes a traction machine 200, comprising a rotor 201, a stator 202, and a combined rotor magnetic pole structure 100 as described above. The rotor 201 is sleeved outside the stator 202, and there is a gap between the rotor 201 and the stator 202. Multiple combined rotor magnetic pole structures 100 are provided, each mounted inside the rotor 201 and distributed circumferentially along the rotor 201. All combined rotor magnetic pole structures 100 are located within the gap. Specifically, applying the combined rotor magnetic pole structure 100 to the traction machine 200 can reduce the production cost of the traction machine 200 and reduce the generation of processing waste.

[0048] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.

[0049] The purpose of the above embodiments is to reproduce and derive the technical solution of this utility model by way of example, and to fully describe the technical solution, purpose and effect of this utility model. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of this utility model, and it is not intended to limit the protection scope of this utility model.

[0050] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A combined rotor magnetic pole structure, characterized in that, include: A magnetic attraction assembly and a support assembly are provided. The magnetic attraction assembly includes a first magnetic attraction element and at least two second magnetic attraction elements. The support assembly includes a support frame with openings. The number of openings corresponds to the number of second magnetic attraction elements. One end of each second magnetic attraction element passes through the opening and is fixedly connected to the first magnetic attraction element. The outer wall of each second magnetic attraction element abuts against the inner wall of the support frame. The support frame is located between the second magnetic attraction elements and the first magnetic attraction elements. Each of the second magnetic attractors has a mating surface, and the first magnetic attractor has a working surface, with the mating surface and the working surface being disposed opposite to each other.

2. The combined rotor magnetic pole structure as described in claim 1, characterized in that, The support assembly further includes at least one set of abutting members, each set of abutting members including two abutting blocks, the two abutting blocks being respectively installed on both sides of the support frame, and the inner wall of the abutting block abutting against the side wall of the first magnetic member.

3. The combined rotor magnetic pole structure as described in claim 2, characterized in that, The second magnetic attractor has four pieces, which are arranged in an array. Two of the second magnetic attractors are arranged vertically with the other two and form a junction. The installation position of the abutment corresponds to the junction.

4. The combined rotor magnetic pole structure as described in claim 3, characterized in that, The second magnetic attractor has multiple pieces, and the multiple second magnetic attractors are distributed in an array.

5. The combined rotor magnetic pole structure as described in claim 3, characterized in that, The first magnetic suction component has a first adhesive surface, which is disposed opposite to the working surface. The second magnetic suction component has a second adhesive surface, which is disposed opposite to the joint surface. The first adhesive surface and the second adhesive surface are bonded and fixed together.

6. The combined rotor magnetic pole structure as described in claim 5, characterized in that, Both the first and second adhesive surfaces are planar. After any two second magnetic components are spliced ​​together, the two joint surfaces of any two second magnetic components form an arch shape and protrude away from the support frame. The working surface of the first magnetic component also protrudes away from the support frame.

7. The combined rotor magnetic pole structure as described in claim 2, characterized in that, The cross-section of the abutment block is bent, and the abutment block has a connecting surface and an abutment surface. The connecting surface is fixedly connected to the outer wall of the support frame, and the abutment surface abuts against the side wall of the first magnetic attractor.

8. The combined rotor magnetic pole structure as described in claim 7, characterized in that, The width of the abutting surface is greater than the width of the side wall of the first magnetic component, and the abutting surface is aligned with the side wall of the first magnetic component.

9. The combined rotor magnetic pole structure as described in any one of claims 1 to 8, characterized in that, The first magnetic attractor is made of a magnetically conductive material, and the second magnetic attractor is made of a permanent magnet material.

10. A traction machine, characterized in that, The device includes a rotor, a stator, and a combined rotor magnetic pole structure as described in any one of claims 1 to 9, wherein the rotor is sleeved outside the stator and there is a gap between the rotor and the stator; the combined rotor magnetic pole structure has multiple components, each of which is installed on the inner side of the rotor and distributed along the circumference of the rotor, and each of the multiple combined rotor magnetic pole structures is located within the gap.

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