Pre-insertion jig of rotor iron core magnetic steel, rotor iron core insertion device and operation method

Abstract

The invention belongs to the field of motor assembly, and particularly relates to a pre-insertion jig of rotor iron core magnetic steel, a rotor iron core insertion device and an operation method, and the pre-insertion jig comprises a jig body, magnetic steel insertion holes, spring marbles and magnetic isolation permanent magnets; the magnetic steel imbedding hole is formed in the jig body and is used for imbedding a magnetic steel sheet; the spring marble is arranged in the magnetic steel imbedding hole; and the magnetic isolation permanent magnets are arranged between the adjacent magnetic steel imbedding holes. Compared with the prior art, the defect that the position of automatic magnet insertion cannot be controlled due to mutual influence between the magnetic steel sheets in the prior art is overcome, the magnetic steel sheets are inserted into the pre-insertion jig, the insertion position of the magnetic steel sheets is limited, and the magnetic steel sheets are inserted into the pre-insertion jig. Therefore, when the magnetic steel sheets are formally inserted into the magnetic steel grooves of the rotor iron core, the magnetic steel sheets are far away from the overlapped positions of the magnetic steel grooves, and position conflicts and influences between adjacent magnetic steel sheets are avoided.

Description

Technical Field

[0001] The invention belongs to the field of motor assembly, and in particular relates to a pre-insertion jig for rotor core magnetic steel and a rotor core insertion device and an operating method. Background Art

[0002] In the existing insert-type rotors, the insertion of magnets is done manually. The main difficulty in the automatic magnet insertion process is that when the magnet enters the magnetic steel slot, the gap between the magnet and the slot is too large, which makes it impossible to fix its position in the slot, which easily affects the insertion of magnets in other positions, and ultimately leads to inaccurate insertion positions and the product cannot achieve the designed effect. Therefore, the reason why automatic magnet insertion cannot be achieved in the prior art is that it is impossible to control the magnets to enter the magnetic steel slot without interfering with each other. Therefore, all the existing rotor production lines that have been put into production are manually inserted magnets, and under this method, the efficiency is low and the precision is insufficient, and the product quality is highly correlated with the workers' experience, which makes the product stability poor.

[0003] For example, in the asynchronous start three-phase permanent magnet synchronous motor structure disclosed in CN203896156U, it can be seen that in some permanent magnet synchronous motors, the magnetic steel slot is a V-shaped structure, and a magnetic steel sheet needs to be placed on each side of the V-shaped structure, so there is an overlap between the two magnetic steel sheets. Since the magnets cannot enter the iron core without interfering with each other during the insertion process, the position and angle of the magnets entering the magnetic steel slot are random, and there is an overlap in the insertion position, and another magnetic steel sheet cannot be inserted. There is even a situation where the magnetic steel sheet is broken due to extrusion and collision during the insertion process, which seriously affects the product quality and production efficiency.

[0004] CN203119712U discloses a tooling for assembling a magnetic steel embedded in the rotor of a permanent magnet motor for a vehicle, including a fixed base and a pressure plate, a space for placing the rotor core is formed between the fixed base and the pressure plate through a support column, a magnetic isolation mold sleeve is provided on the pressure plate, and a guide groove identical to the magnetic steel embedded groove is provided on the magnetic isolation mold sleeve. However, in this scheme, only the tooling can be used to achieve guidance to avoid wrong or crooked installation, and the assembly process still requires manual disassembly and assembly of the tooling, placing the magnetic steel sheet in the magnetic steel groove, and then pushing and pressing it with auxiliary isolation and tools, and automated insertion cannot be achieved.

[0005] Based on the deficiencies in the prior art, it is necessary to propose a device that cooperates with the existing production line to achieve accurate insertion of magnetic steel sheets, avoid mutual influence between the magnetic steel sheets, and thus realize automated production. Summary of the invention

[0006] The purpose of the present invention is to provide a pre-insertion jig for rotor core magnets and a rotor core insertion device and operating method in order to solve at least one of the above problems, so as to solve the deficiency in the prior art that the position of the automatic magnet insertion cannot be controlled due to the mutual influence between the magnetic steel sheets. The present solution realizes the limitation and pre-positioning of the insertion position of the magnetic steel sheets by first inserting the magnetic steel sheets into the pre-insertion jig, so that the magnetic steel sheets are away from the overlapping positions of the magnetic steel slots when they are formally inserted into the magnetic steel slots of the rotor core, thereby avoiding position conflicts and influences between adjacent magnetic steel sheets.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] The first aspect of the present invention discloses a rotor core magnetic steel pre-insertion jig, comprising a jig body, a magnetic steel insertion hole, a spring marble and a magnetic isolation permanent magnet;

[0009] The magnetic steel insertion holes are arranged through the upper and lower end surfaces of the fixture body and are used to insert the magnetic steel sheets;

[0010] The magnetic isolation permanent magnet is arranged inside the fixture body, and the magnetic isolation permanent magnet is arranged close to one side of the magnetic steel insertion hole, and is used to magnetically position the magnetic steel sheet on the side of the magnetic isolation permanent magnet in the magnetic steel insertion hole;

[0011] The spring marble is embedded in the other side of the magnetic steel insertion hole through the mounting hole opened on the side wall of the fixture body, and is used to push the magnetic steel sheet toward the side of the magnetic steel insertion hole close to the magnetic isolation permanent magnet.

[0012] The magnetic attraction of the magnetic isolation permanent magnet on the magnetic steel sheet and the abutment of the spring ball on the magnetic steel sheet both pre-position the magnetic steel sheet toward a position close to the magnetic isolation permanent magnet. This position corresponds to a position in the magnetic steel slot of the rotor core that is away from the overlapping part. Therefore, when the magnetic steel sheet is inserted into the magnetic steel slot of the rotor core through a pre-insertion fixture, the present scheme can effectively control the insertion position of the magnetic steel sheet to avoid overlap, collision, etc. of the magnetic steel sheet in the overlapping area of ​​the magnetic steel slot.

[0013] Preferably, the magnetic isolation permanent magnet includes a fixing ring mounted on the fixture body and permanent magnets arranged circumferentially along the fixing ring, the permanent magnets are arranged close to one side of the magnet insertion hole, and the number of permanent magnets arranged is consistent with the number of magnet insertion holes.

[0014] Preferably, 6 to 12 magnetic steel insertion holes are provided along the circumferential direction, and the magnetic steel insertion holes are arranged at equal intervals.

[0015] Preferably, the pre-insertion fixture is a rotationally symmetrical structure.

[0016] Under this structure, the pre-insertion fixture can match the common rotor core, so that the magnetic steel insertion hole and the magnetic steel slot of the rotor core can correspond to each other, so that the magnetic steel sheet inserted into the magnetic steel insertion hole can be accurately transferred to the magnetic steel slot.

[0017] Preferably, the magnetic steel sheet and the magnetic steel insertion hole are clearance-fitted.

[0018] Preferably, the pre-insertion jig further comprises a pin disposed at the bottom of the jig body for positioning and docking the pre-insertion jig with the rotor core.

[0019] Preferably, the opening of the magnetic steel insertion hole is provided with a chamfer.

[0020] A second aspect of the present invention discloses a rotor core insertion device, comprising a mechanical arm, a magnetic shielding structure and a pre-insertion jig as described above;

[0021] The pre-insertion fixture is connected to the end of the robotic arm;

[0022] The magnetic blocking structure comprises a rotating part connected to the mechanical arm and a magnetic blocking block connected to the end of the rotating part; the magnetic blocking structure drives the magnetic blocking block to move through the rotating part to block or separate from the lower end of the magnetic steel insertion hole.

[0023] Preferably, the pre-insertion fixture is connected to the end of the robotic arm via a snap-fit ​​mechanism.

[0024] A third aspect of the present invention discloses an operating method of the rotor core insertion device as described above.

[0025] The magnetic steel sheet is inserted into the pre-insertion fixture: the mechanical arm clamps the pre-insertion fixture, and the magnetic blocking structure moves so that the magnetic blocking block blocks the lower end of the magnetic steel insertion hole, and then the magnetic steel sheet is inserted into the magnetic steel insertion hole in sequence. Under the action of the magnetic isolation permanent magnet and the spring marble, the magnetic steel sheet is limited to the side of the magnetic isolation permanent magnet in the magnetic steel insertion hole;

[0026] The magnetic steel sheets are inserted into the rotor core: the magnetic blocking structure acts to separate the magnetic blocking block from the lower end of the magnetic steel insertion hole, and then the magnetic steel sheets are respectively introduced into the magnetic steel slots of the rotor core through the magnetic steel insertion holes. Based on the pre-positioning of the magnetic steel sheets in the pre-insertion fixture, the magnetic steel sheets are respectively located in the magnetic steel slots away from the overlapping parts.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This structure enables the magnetic steel sheets to be effectively controlled and kept on the side away from the overlapping parts during the transfer process from packaging → pre-insertion jig → rotor core magnetic steel slot, so that each magnetic steel sheet can be smoothly inserted into the magnetic steel slot without affecting each other;

[0029] The main structure of the pre-insertion fixture is composed of a magnetic steel insertion hole + a spring marble + a permanent magnetic isolation magnet. Since the magnetic steel sheet and the magnetic steel insertion hole are clearance-matched, after the magnetic steel sheet enters the magnetic steel insertion hole, it will be moved closer to the position of the permanent magnetic isolation magnet by the combined action of the spring marble and the permanent magnetic isolation magnet, so as to achieve the purpose of controlling the posture of the magnetic steel sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the pre-insertion fixture;

[0031] Figure 2 It is a schematic diagram of the top view structure of the pre-insertion fixture;

[0032] Figure 3 It is a structural schematic diagram of the rotor core insertion device;

[0033] In the figure: 1- fixture body; 2- magnetic isolation permanent magnet; 3- magnet steel insertion hole; 4- magnetic steel sheet; 5- spring marble; 6- mounting hole; 7- mechanical arm; 8- magnetic blocking structure; 81- rotating part; 82- magnetic blocking block. DETAILED DESCRIPTION

[0034] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] A pre-insertion fixture for rotor core magnetic steel, such as Figure 1-3 As shown, it includes a fixture body 1, a magnetic steel insertion hole 3, a spring marble 5 and a magnetic isolation permanent magnet 2;

[0037] The magnetic steel insertion hole 3 passes through the upper and lower end surfaces of the fixture body 1 and is used to insert the magnetic steel sheet 4;

[0038] The magnetic isolation permanent magnet 2 is located in the fixture body 1 on one side close to the magnetic steel insertion hole 3. The magnetic isolation permanent magnet 2 has magnetic force and can magnetically attract one side of the magnetic steel sheet 1.

[0039] The spring marble 5 is embedded through the mounting hole 6 on the side of the fixture body 1 and rests against the other side of the magnetic steel sheet 1 in the magnetic steel insertion hole 3, so that the magnetic steel sheet 1 is elastically clamped between the magnetic isolation permanent magnet 2 and the spring marble 5.

[0040] More specifically, in this embodiment:

[0041] The magnetic isolation permanent magnet 2 includes a fixed ring and a plurality of permanent magnets. The fixed ring is mounted on the fixture body 1. The plurality of permanent magnets are circumferentially fixed on the outer circumference of the fixed ring and abut against one side of the magnet insertion hole 3. The number of permanent magnets is consistent with the number of the magnet insertion holes 3.

[0042] A plurality of magnetic steel insertion holes 3 are provided along the circumferential direction on the fixture body 1, and the magnetic steel sheets 4 are placed in the magnetic steel insertion holes 3 to control their position through the magnetic isolation permanent magnets 2 and the spring marbles 5. There are 6 to 12 magnetic steel insertion holes 3 arranged at equal intervals, and there is a certain angle between (the extension lines of) adjacent magnetic steel insertion holes 3, and the direction of each magnetic steel insertion hole 3 changes in a clockwise or counterclockwise direction, so that the pre-insertion fixture has a rotationally symmetrical structure; in this embodiment, as Figure 1 , 2 As shown, a total of 8 magnetic steel insertion holes 3 are provided, and adjacent magnetic steel insertion holes 3 have an included angle of 45°.

[0043] The cavity structure of the magnetic steel insertion hole 3 is a rectangular parallelepiped, and a spherical structure is further formed inside the rectangular parallelepiped to accommodate the inserted spring marble 5. The spring marble 5 is connected to the inner wall of the mounting hole 6 through a spring to form an elastic support for the magnetic steel sheet 4 inserted into the magnetic steel insertion hole 3. When the magnetic steel sheet 4 is inserted into the magnetic steel insertion hole 3, it can press against one side of it to prevent it from deflecting. Figure 1 As shown, the mounting hole 6 opened on the side of the pre-insertion fixture is used to install the spring marble 5. In addition, the entrance opening of the magnetic steel insertion hole 3 is also designed with a chamfer to facilitate the rapid alignment and insertion of the magnetic steel sheet 4; and a columnar or hemispherical structure is provided at the center of the opening of the magnetic steel insertion hole 3 to facilitate the insertion of the magnetic steel sheet 4 by clamping.

[0044] The magnetic steel insertion hole 3 and the inserted magnetic steel sheet 4 are in the form of a clearance fit, and the position of the magnetic steel sheet 4 can be adjusted by the permanent magnetic isolation magnet 2 and the spring ball 5, so as to effectively control the position of the magnetic steel sheet 4 and the pre-positioning of the magnetic steel sheet 4 in the pre-insertion fixture, so as to achieve the purpose of controlling the angle of the magnetic steel sheet 4 entering the rotor core.

[0045] A pin is also provided at the bottom of the pre-insertion jig, which is inserted into the rivet hole of the rotor core to complete the positioning between the rotor core and the pre-insertion jig. The pin can be multiple and is used for concentric and circumferential docking and positioning.

[0046] Example 2

[0047] A rotor core insertion device, comprising a mechanical arm 7, a magnetic shielding structure 8 and a pre-insertion jig as described in Example 1;

[0048] The pre-insertion fixture is connected to the end of the mechanical arm 7;

[0049] The magnetic blocking structure 8 includes a rotating member connected to the mechanical arm 7 and a magnetic blocking block connected to the end of the rotating member; the magnetic blocking structure 8 drives the magnetic blocking block 82 to move through the rotating member 81 to block or disengage from the lower end of the magnetic steel insertion hole 3.

[0050] More specifically, in this embodiment:

[0051] The present embodiment further proposes a rotor core magnetic steel insertion device, comprising a mechanical arm 7, a locking mechanism, a magnetic blocking structure 8 and the pre-insertion jig proposed in Embodiment 1. The mechanical arm 7 is assembled and connected to the outside of the jig body 1 through the locking mechanism. The magnetic blocking structure 8 is installed on the mechanical arm and can move to the bottom of the magnetic steel insertion hole 3 to prevent the magnetic steel sheet 4 in the magnetic steel insertion hole 3 from falling, or move away from the lower end of the magnetic steel insertion hole 3 to release the magnetic steel sheet 4.

[0052] Specifically, the magnetic blocking structure 8 includes a magnetic blocking block 82 and a rotating member 81, wherein the rotating member 81 is connected to the mechanical arm 7, and the magnetic blocking block 82 is connected to the end of the rotating member 81. The magnetic blocking block 82 is rotated by the rotating member 81 so that the magnetic blocking block 82 is located below the magnetic steel insertion hole 3, and is used to block the magnetic steel sheet 4 in the magnetic steel insertion hole 3 from falling; when it is necessary to release, the rotating member 81 rotates the magnetic blocking block 82 to leave the magnetic steel insertion hole 3, so that there is no obstacle on the falling channel of the magnetic steel sheet 4.

[0053] When the rotor core magnetic steel insertion device is used:

[0054] The mechanical arm 7 clamps the pre-insertion jig and transfers the magnetic steel sheet 4 into the pre-insertion jig. Specifically, the magnetic blocking block 82 rotates below the magnetic steel insertion hole 3, and the magnetic steel sheet 4 is inserted into the magnetic steel insertion hole 3 in sequence. Under the magnetic force of the magnetic isolation permanent magnet 2, the stop position of the magnetic steel sheet 4 is close to the side of the magnetic steel insertion hole 3 (corresponding to the two side ends of the magnetic steel slot of the rotor core). At the same time, the spring ball 5 elastically presses the other side of the magnetic steel sheet 4 to achieve the limitation of the magnetic steel sheet 4 inside the magnetic steel insertion hole 3.

[0055] The magnetic steel sheet 4 is pressed down and pushed out of the magnetic steel insertion hole 3 so that it can be inserted into the magnetic steel slot of the rotor core. Specifically, the magnetic blocking block 82 is rotated to make it separate from the position below the magnetic steel insertion hole 3, and then the magnetic steel sheet 4 is further introduced from the magnetic steel insertion hole 3 into the magnetic steel slot of the rotor core. Based on the pre-positioning of the magnetic steel sheet 4 in the pre-insertion fixture, the magnetic steel sheet 4 is located at the end position in the magnetic steel slot and away from the overlapping part.

[0056] By using the pre-insertion jig, the magnetic steel sheet 4 can be pre-positioned for formal assembly into the magnetic steel slot. In this way, it can be ensured that the magnetic steel sheet 4 is always kept on the side close to the end from packaging to the pre-insertion jig and into the magnetic steel slot, so as to achieve a smooth insertion effect and avoid mutual interference and structural influence of the overlapping parts of the magnetic steel sheet 4 in the V-shaped magnetic steel slot.

[0057] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A pre-insertion fixture for rotor core magnetic steel, characterized in that: It comprises a fixture body (1), a magnetic steel insertion hole (3), a spring marble (5) and a magnetic isolation permanent magnet (2); The magnetic steel insertion hole (3) is set through the upper and lower end surfaces of the fixture body (1) and is used to insert the magnetic steel sheet (4); The magnetic isolation permanent magnet (2) is arranged inside the fixture body (1), and the magnetic isolation permanent magnet (2) is arranged close to one side of the magnetic steel insertion hole (3), so as to magnetically position the magnetic steel sheet (4) on the side of the magnetic steel insertion hole (3) close to the magnetic isolation permanent magnet (2); The spring marble (5) is embedded in the other side of the magnetic steel insertion hole (3) through a mounting hole (6) opened on the side wall of the jig body (1), and is used to push the magnetic steel sheet (4) toward the side of the magnetic steel insertion hole (3) close to the magnetic isolation permanent magnet (2).

2. A rotor core magnetic steel pre-insertion jig according to claim 1, characterized in that: The magnetic isolation permanent magnet (2) comprises a fixing ring mounted on the fixture body (1) and permanent magnets arranged along the circumference of the fixing ring. The permanent magnets are arranged close to one side of the magnet insertion hole (3), and the number of permanent magnets arranged is consistent with the number of magnet insertion holes (3).

3. A rotor core magnetic steel pre-insertion jig according to claim 1 or 2, characterized in that: The magnetic steel insertion holes (3) are provided with 6 to 12 holes along the circumferential direction, and the magnetic steel insertion holes (3) are arranged at equal intervals.

4. The pre-insertion jig for rotor core magnetic steel according to claim 3, characterized in that: The pre-insertion fixture is a rotationally symmetrical structure.

5. The pre-insertion jig for rotor core magnetic steel according to claim 1, characterized in that: The magnetic steel sheet (4) and the magnetic steel insertion hole (3) are clearance-matched.

6. The pre-insertion jig for rotor core magnetic steel according to claim 1, characterized in that: The pre-insertion jig further comprises a pin arranged at the bottom of the jig body (1) and used for positioning and docking the pre-insertion jig with the rotor core.

7. The pre-insertion jig for rotor core magnetic steel according to claim 1, characterized in that: The opening of the magnetic steel insertion hole (3) is provided with a chamfer.

8. A rotor core insertion device, characterized in that: It comprises a mechanical arm (7), a magnetic shielding structure (8) and a pre-insertion fixture as claimed in any one of claims 1 to 7; The pre-insertion fixture is connected to the end of the mechanical arm (7); The magnetic blocking structure (8) comprises a rotating member connected to the mechanical arm (7) and a magnetic blocking block connected to the end of the rotating member; the magnetic blocking structure (8) drives the magnetic blocking block (82) to move through the rotating member (81) to block or disengage from the lower end of the magnetic steel insertion hole (3).

9. A rotor core insertion device according to claim 8, characterized in that: The pre-insertion fixture is connected to the end of the mechanical arm (7) via a snap-fit ​​mechanism.

10. An operating method of the rotor core insertion device according to claim 8 or 9, characterized in that: The magnetic steel sheet (4) is inserted into the pre-insertion fixture: the mechanical arm (7) clamps the pre-insertion fixture, and the magnetic blocking structure (8) moves to make the magnetic blocking block (82) block the lower end of the magnetic steel insertion hole (3), and then the magnetic steel sheet (4) is inserted into the magnetic steel insertion hole (3) in sequence. Under the action of the magnetic isolation permanent magnet (2) and the spring marble (5), the magnetic steel sheet (4) is limited to a side of the magnetic isolation permanent magnet (2) in the magnetic steel insertion hole (3); The magnetic steel sheet (4) is inserted into the rotor core: the magnetic blocking structure (8) is actuated to allow the magnetic blocking block (82) to be separated from the lower end of the magnetic steel insertion hole (3), and then the magnetic steel sheet (4) is respectively introduced into the magnetic steel slot of the rotor core through the magnetic steel insertion hole (3). Based on the pre-positioning of the magnetic steel sheet (4) in the pre-insertion fixture, the magnetic steel sheet (4) is respectively located in the magnetic steel slot at a position away from the overlapping part.

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