Tool for assembling magnetic steel of permanent magnet synchronous motor

Abstract

The utility model discloses a tool for assembling magnetic steel of a permanent magnet synchronous motor, which comprises a plurality of plastic guide blocks, each plastic guide block is provided with an embedded through groove, and the magnetic steel enters a magnetic steel groove of a rotor core through the embedded through grooves; the upper fixing plates are located on the corresponding plastic guide blocks, each upper fixing plate is provided with a strip-shaped through hole, and the strip-shaped through holes are matched with the embedded through grooves in shape and size; the lower fixing plates are connected with the corresponding upper fixing plates through fixing screw rods, and rotor iron cores formed by stacking rotor punching sheets are arranged between the upper fixing plates and the lower fixing plates; and the first nylon short stop block is positioned in the embedding through groove and is used for shielding the magnetic steel groove of the magnetic steel to be embedded and / or the embedded whole column of magnetic steel. The tool can guarantee the accuracy and stability of the magnetic steel in the assembling process, reduces the assembling error, improves the assembling precision, and guarantees the operation stability of a motor. The labor intensity of operators is greatly reduced, and the working difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing and processing, in particular to a tool for assembling magnetic steel of a permanent magnet synchronous motor. Background Art

[0002] After the rotor laminations of a conventional permanent magnet synchronous motor are stacked, the magnets can be directly embedded in the rotor core; however, due to the strong magnetic properties of the magnets, the rotor laminations with a narrow magnetic bridge are easily deformed during installation, which increases the difficulty of installation. In addition, during direct installation, it is difficult to ensure that the magnets can be fully aligned with the magnet slots on the rotor laminations. If the positioning is inaccurate, the gap between the magnets and the rotor laminations may be uneven, which in turn affects the performance of the motor. Improper operation, such as excessive force or incorrect direction, may cause the magnets to be damaged or cracked. This not only increases costs, but also affects the overall performance of the motor.

[0003] Due to the difficulty of installing the magnet and inaccurate positioning, directly installing the magnet will reduce production efficiency. This may lead to an extension of the production cycle and affect the economic benefits of the enterprise. In order to ensure that the magnet can be accurately and stably embedded in the punching sheet, the operator needs to have certain skills and experience; if the skill level is not high, it will still affect the installation quality and efficiency. Therefore, in actual production, it is necessary to use some auxiliary tools or tooling to assemble the magnet to reduce the difficulty of operation and the risk of damage. Utility Model Content

[0004] The purpose of the utility model is to provide a tool for assembling the magnetic steel of a permanent magnet synchronous motor, so as to accurately assemble the magnetic steel and prevent the magnetic steel from being damaged during the assembly process, thereby greatly improving the assembly efficiency.

[0005] To achieve the above purpose, the present application proposes a tool for assembling magnetic steel of a permanent magnet synchronous motor, comprising:

[0006] A plurality of plastic guide blocks, each of which is provided with an embedding slot, through which the magnetic steel enters the magnetic steel slot of the rotor core;

[0007] A plurality of upper fixing plates are located on the corresponding plastic guide blocks, each of which is provided with a strip-shaped through hole, the shape and size of which match the embedded through slot;

[0008] A plurality of lower fixing plates are connected to the corresponding upper fixing plates through fixing screws, and a rotor core formed by stacking rotor punchings is arranged between the upper fixing plates and the lower fixing plates;

[0009] The first nylon short stopper is located in the embedding through groove and is used to block the magnetic steel grooves to be embedded with magnetic steel and / or the entire row of embedded magnetic steel.

[0010] Furthermore, the structure formed by the multiple plastic guide blocks can completely cover the top of the rotor core, and a screw through hole is opened on each plastic guide block.

[0011] Furthermore, when there are two rows of magnetic steel grooves under each plastic guide block, the length of the first nylon short stopper is the same as the length of each row of magnetic steel grooves.

[0012] Furthermore, when there are three rows of magnetic steel slots under each plastic guide block, a second nylon short stopper is also included, and the length of the first nylon short stopper and the length of the second nylon short stopper are the same as the length of each row of magnetic steel slots.

[0013] Furthermore, when there are three rows of magnetic steel slots under each plastic guide block, a long nylon stopper is also included, and the length of the long nylon stopper is equal to the sum of the lengths of the two rows of magnetic steel slots.

[0014] Furthermore, two or three avoidance grooves are provided at the bottom of the plastic guide block. When the entire row of magnetic steels is embedded, the magnetic steel baffle is inserted from the corresponding avoidance grooves.

[0015] Furthermore, the embedding groove of the plastic guide block is coated with retaining glue.

[0016] Furthermore, the magnets are placed one by one into the magnet slots using epoxy rods.

[0017] As a further step, a structure surrounded by multiple lower fixing plates is placed at the bottom of the rotor core and can completely cover the magnetic steel slots.

[0018] As a further step, locking nuts are connected to both ends of the fixing screw to ensure that the length of the rotor core does not change during the embedding process of the magnetic steel.

[0019] Compared with the prior art, the above technical solution adopted by the utility model has the following advantages:

[0020] Improve assembly efficiency: This tooling makes the assembly process faster and more efficient, which can significantly reduce assembly time and improve production efficiency.

[0021] Ensure assembly quality: This tooling can ensure the accuracy and stability of the magnetic steel during the assembly process, reduce assembly errors, and improve assembly precision, thereby ensuring the stability of motor operation.

[0022] Reduce labor intensity: This tooling can greatly reduce the labor intensity of operators and reduce work difficulty.

[0023] Improve safety: This tooling can reduce safety risks during operation and ensure the safety of the assembly process.

[0024] Wide applicability: This tooling can meet the assembly requirements of permanent magnet synchronous motor magnetic steel of different specifications and models, and has strong versatility and flexibility.

[0025] Easy to maintain: The structure of this tool is relatively simple and easy to maintain and service. During use, it can be easily cleaned, inspected and repaired to ensure the long-term stable operation of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the use status of the tooling for assembling the magnetic steel of the permanent magnet synchronous motor;

[0027] Figure 2 This is an enlarged top view of the permanent magnet synchronous motor magnetic steel assembly tooling in use;

[0028] Figure 3 It is a top cross-sectional view of the permanent magnet synchronous motor magnetic steel assembly tooling in use;

[0029] Among them: 1. motor shaft, 2. upper fixing plate, 3. plastic guide block, 4. rotor core, 5. fixing screw, 6. lower fixing plate, 7. avoidance groove, 8. first nylon short stopper, 9. second nylon short stopper, 10. nylon long stopper, 11. embedded through groove, 12. magnetic steel baffle, 13. magnetic steel. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the prior art, the rotor punching is inserted into the motor shaft 1 to form the rotor core. When the magnet 13 is directly embedded in the magnet slot without a tool, the area between the two magnetic isolation bridges of the rotor punching is easily deformed, causing irreversible damage to the rotor punching, and the magnet 13 is not easy to align with the magnet slot. To solve this problem, please refer to 1- Figure 3 This embodiment provides a tool for assembling magnetic steel of a permanent magnet synchronous motor, which solves the problems of deformation of rotor punchings and difficulty in assembling magnetic steel slots during magnetic steel assembly; the tool includes:

[0036] A plurality of plastic guide blocks, each of which is provided with an embedding slot, through which the magnetic steel enters the magnetic steel slot of the rotor core; the structure surrounded by the plurality of plastic guide blocks can completely cover the top of the rotor core;

[0037] A plurality of upper fixing plates are located on the corresponding plastic guide blocks, each of which is provided with a strip-shaped through hole, the shape and size of which match the embedded through slot; a structure surrounded by a plurality of lower fixing plates is placed at the bottom of the rotor core and can completely cover the magnetic steel slot;

[0038] Multiple lower fixing plates are connected to the corresponding upper fixing plates through fixing screws. A rotor core formed by stacking rotor punchings is arranged between the upper fixing plates and the lower fixing plates. Locking nuts are connected to both ends of the fixing screws to ensure that the length of the rotor core does not change during the embedding process of the magnetic steel. A screw through hole is opened on each plastic guide block;

[0039] A first nylon short stopper is located in the embedding through groove and is used to cover the magnetic steel slots to be embedded in the magnetic steel and / or the entire row of embedded magnetic steels; when there are two rows of magnetic steel slots under each plastic guide block, the length of the first nylon short stopper is the same as the length of each row of magnetic steel slots;

[0040] In this embodiment, when there are three rows of magnetic steel slots under each plastic guide block, a second nylon short stopper is also included. The length of the first nylon short stopper and the length of the second nylon short stopper are the same as the length of each row of magnetic steel slots. This situation is applicable to the magnetic steel being embedded in the middle row. The first nylon short stopper and the second nylon short stopper are used to block the magnetic steel slots to be embedded in the magnetic steel and / or the entire row of magnetic steel that has been embedded.

[0041] In this embodiment, when there are three columns of magnetic steel grooves under each plastic guide block, a long nylon stopper is also included, and the length of the long nylon stopper is equal to the sum of the lengths of the two columns of magnetic steel grooves. This situation is applicable to the magnetic steel being embedded in the left column or the right column. When the left column of magnetic steel is being embedded, the long nylon stopper is used to cover the magnetic steel grooves in the middle column and the right column. When the right column of magnetic steel is being embedded, the long nylon stopper is used to cover the entire column of magnetic steel in the middle column and the left column.

[0042] As a preferred implementation of the eraser device provided in this embodiment, two or three avoidance grooves are provided at the bottom of the plastic guide block. When the entire row of magnetic steels is embedded, the magnetic steel baffle is inserted from the corresponding avoidance grooves.

[0043] The effects of this implementation are to improve the efficiency of embedding the rotor punchings into the magnetic steel, reduce the possibility of failure and rework, ensure the safety of operators, and improve the running stability of the motor.

[0044] The above-mentioned permanent magnet synchronous motor magnetic steel assembly tooling is used as follows: first, the motor shaft and the rotor core assembly are placed vertically on the workbench, and then a plurality of lower fixing plates 6 are placed under the rotor core, and a plurality of plastic guide blocks 3 and a plurality of upper fixing plates 2 are placed on the rotor core in sequence; the upper fixing plate 2 and the lower fixing plate 6 are connected by the fixing screw 5, and the locking nut is tightened to ensure that during the embedding process of the magnetic steel 13, the length of the rotor core does not change, and the topmost layer of rotor punchings is not deformed by suction.

[0045] This embodiment is explained by assuming that there are three rows of magnetic steel grooves under each plastic guide block. When the left row of magnetic steel needs to be embedded, the long nylon block 10 is used to cover the magnetic steel grooves in the middle and right rows, so that the embedded through groove 11 forms a new single-row guide groove. Since the guide block 3 is made of plastic and the block is made of nylon, the magnetic steel is subjected to very little force in the guide groove and can be placed vertically in the guide groove. Before the magnetic steel 13 is placed, a small amount of retaining glue needs to be applied in the guide groove, and the epoxy rod is used to place the magnetic steels one by one at the bottom of the magnetic steel groove until the entire left row of magnetic steel is embedded. Since there is a repulsive effect between the adjacent upper and lower magnetic steels, the top magnetic steel is easily pushed out of the magnetic steel groove. Therefore, when the entire row of magnetic steel is embedded, the magnetic steel baffle 12 is embedded in the avoidance groove 7 of the plastic guide block to prevent the magnetic steel from flying out. Then, when embedding the middle column of magnets, use the first nylon short block 8 to cover the entire left column of magnets that have been embedded, and use the second nylon short block 9 to cover the magnetic steel slots in the right column where the magnets are to be embedded. After inserting the middle column of magnets one by one, embed the corresponding magnetic steel baffles; finally, when embedding the right column of magnets, use the nylon long block 10 to cover the entire left and middle column of magnets. After inserting the middle column of magnets one by one, embed the corresponding magnetic steel baffles.

[0046] After the retaining glue in the rotor core is solidified, the nuts on both sides of the fixing screw 5 are removed, and the plastic guide block 3 and the upper fixing plate 2 and the lower fixing plate 6 are removed.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tool for assembling magnetic steel of a permanent magnet synchronous motor, characterized in that: include: A plurality of plastic guide blocks, each of which is provided with an embedding slot, through which the magnetic steel enters the magnetic steel slot of the rotor core; A plurality of upper fixing plates are located on the corresponding plastic guide blocks, each of which is provided with a strip-shaped through hole, the shape and size of which match the embedded through slot; A plurality of lower fixing plates are connected to the corresponding upper fixing plates through fixing screws, and a rotor core formed by stacking rotor punchings is arranged between the upper fixing plates and the lower fixing plates; The first nylon short stopper is located in the embedding through groove and is used to block the magnetic steel grooves to be embedded with magnetic steel and / or the entire row of embedded magnetic steel.

2. According to claim 1, a permanent magnet synchronous motor magnetic steel assembly tool, characterized in that: The structure surrounded by a plurality of plastic guide blocks can completely cover the top of the rotor core, and a screw through hole is opened on each plastic guide block.

3. The tooling for assembling magnetic steel of a permanent magnet synchronous motor according to claim 1, characterized in that: When there are two rows of magnetic steel slots under each plastic guide block, the length of the first nylon short stopper is the same as the length of each row of magnetic steel slots.

4. The tooling for assembling magnetic steel of a permanent magnet synchronous motor according to claim 1, characterized in that: When there are three rows of magnetic steel slots under each plastic guide block, a second nylon short stopper is also included, and the length of the first nylon short stopper and the length of the second nylon short stopper are the same as the length of each row of magnetic steel slots.

5. The tooling for assembling magnetic steel of a permanent magnet synchronous motor according to claim 1, characterized in that: When there are three rows of magnetic steel slots under each plastic guide block, a long nylon stopper is also included, and the length of the long nylon stopper is equal to the sum of the lengths of the two rows of magnetic steel slots.

6. A tool for assembling magnetic steel of a permanent magnet synchronous motor according to claim 2, 3 or 4, characterized in that: The bottom of the plastic guide block is provided with two or three avoidance grooves. When the entire row of magnetic steel is embedded, the magnetic steel baffle is inserted from the corresponding avoidance grooves.

7. The tooling for assembling magnetic steel of a permanent magnet synchronous motor according to claim 1, characterized in that: The embedded through groove of the plastic guide block is coated with retaining glue.

8. The tooling for assembling magnetic steel of a permanent magnet synchronous motor according to claim 1, characterized in that: Use epoxy rods to place the magnets into the magnet slots one by one.

9. The tooling for assembling magnetic steel of a permanent magnet synchronous motor according to claim 1, characterized in that: The structure surrounded by multiple lower fixing plates is placed at the bottom of the rotor core and can completely cover the magnetic steel slots.

10. The tooling for assembling magnetic steel of a permanent magnet synchronous motor according to claim 1, characterized in that: The two ends of the fixing screw are connected with locking nuts to ensure that the length of the rotor core does not change during the embedding process of the magnetic steel.

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