Device suitable for assembling strong magnets

Abstract

The utility model discloses a device suitable for assembling a strong magnet, which comprises a moving part and a fixed part which are arranged up and down, and a guide structure for connecting the moving part and the fixed part, and the guide structure is matched with a spring. And the fixed part comprises a positioning sleeve for positioning the iron core. The moving part comprises an expansion sleeve and an expansion sleeve pressing plate, a long bolt is connected with the expansion sleeve pressing plate and a moving part body, and the expansion sleeve pressing plate presses the expansion sleeve on the circular truncated cone structure of the moving part body. The long bolt pulls the expansion sleeve pressing plate, the expansion sleeve pressing plate presses the expansion sleeve, the outer diameter of the expansion sleeve is increased, the magnet is tightly supported, and the magnet is located on the expansion sleeve. The iron core is positioned in the positioning sleeve, the moving part and the magnet move downwards, the magnet makes contact with the iron core, under the action of the spring, the magnet and the iron core which are magnetically attracted together move upwards along with the moving part, and the assembling process of the magnet and the iron core is completed. The device is simple in structure and low in resource investment, has certain flexibility, and is particularly suitable for small-batch or trial production.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a rare earth permanent magnet motor. Background Art

[0002] Permanent magnets play an indispensable role in permanent magnet motors. With the increase in the volume of rare earth permanent magnets, the magnet suction force becomes greater and greater. Especially for motors in some special scenarios, such as axial flux motors, linear motors, electromagnets, etc., the assembly of magnets has become a major pain point.

[0003] In view of the large suction force (for example, the suction force reaches 800N) of large-volume permanent magnets during the assembly process, it is necessary to overcome the suction force for operation during the assembly process. On the one hand, the operation difficulty is relatively large, and on the other hand, there is a certain degree of safety risk.

[0004] To solve the above technical problems, the existing technology mainly develops special equipment, which has a large investment, poor compatibility, and is not suitable for small-batch production. Summary of the Utility Model

[0005] The technical problem solved by the utility model: For the assembly of large-volume permanent magnets, the existing technology uses customized special equipment, which has a large one-time investment, poor flexibility, and is not suitable for small-scale or trial production.

[0006] To solve the above technical problems, the utility model provides the following technical solution: A device suitable for the assembly of high-strength magnets, including a moving part and a fixed part arranged up and down, and a guiding structure connecting the fixed part and the moving part. The fixed part includes a positioning sleeve for positioning the iron core and a fixing bolt screwed on the side wall of the positioning sleeve to limit the iron core. The moving part includes an expansion sleeve and an expansion sleeve pressing plate. The outer side of the expansion sleeve is a straight wall structure, the inner side of the expansion sleeve is a conical structure, and a plurality of circumferentially distributed notches are provided on the expansion sleeve. The bottom of the main body of the moving part is a frustum structure. A long bolt connects the expansion sleeve pressing plate and the main body of the moving part, and the expansion sleeve pressing plate presses the expansion sleeve on the frustum structure. The conical structure of the expansion sleeve cooperates with the frustum structure; the guiding structure is equipped with a spring, and the spring is located between the moving part and the fixed part.

[0007] The magnet is sleeved around the expansion sleeve. When the long bolt is actuated, the long bolt pulls the expansion sleeve pressing plate, and the expansion sleeve pressing plate compresses the expansion sleeve, causing it to move axially. Due to the cooperation between the conical structure of the expansion sleeve and the frustum structure, the axial movement of the expansion sleeve increases its outer diameter, which tightens it in the magnet, positioning the magnet on the expansion sleeve. The iron core is positioned in the positioning sleeve, and the fixing bolt screwed on the side wall of the positioning sleeve undergoes radial displacement and abuts against the outer side wall of the iron core, fixing the iron core in the positioning sleeve. The moving part, together with the magnet, moves downward through the guiding structure, and the spring matched with the guiding structure is compressed. The guiding structure ensures the concentricity between the moving part and the fixed part during the up and down movement. When the magnet contacts the iron core, it indicates that the moving part has moved downward in place. At this time, the fixing bolt for fixing the iron core is loosened, and the downward pressure on the moving part is removed. Under the action of the spring, the magnet and the iron core attracted by magnetism move upward together with the moving part, and the moving part moves away from the fixed part, completing the process of assembling the magnet and the iron core.

[0008] The frustum structure is provided with a limiting platform, and the limiting platform can abut against the end face of the expansion sleeve away from the expansion sleeve pressing plate to limit the movement amplitude of the expansion sleeve. Under the pulling of the long bolt, the expansion sleeve pressing plate acts on the expansion sleeve, causing it to axially displace towards the limiting platform. The expansion sleeve abuts against the limiting platform, and the expansion sleeve reaches the maximum displacement.

[0009] The expansion sleeve pressing plate is provided with an annular flange, and the annular flange abuts against the expansion sleeve. When the expansion sleeve pressing plate compresses the expansion sleeve to axially displace along the frustum structure, the end of the frustum structure can penetrate into the annular flange. The hollow structure of the annular flange provides a space for the frustum structure to make way, ensuring the smooth axial displacement of the expansion sleeve.

[0010] Threaded holes are opened on the expansion sleeve pressing plate, and through holes are opened on the main body of the moving part. The long bolt passes through the through hole and is screwed with the threaded hole. The operator uses a tool to turn the long bolt, and the long bolt drives the expansion sleeve pressing plate, and the expansion sleeve pressing plate drives the expansion sleeve to axially displace.

[0011] Notches are opened at both ends of the expansion sleeve, and the notches at both ends of the expansion sleeve are arranged staggeredly along the circumferential direction of the expansion sleeve. The opening of the notches makes it possible to expand the expansion sleeve. The notches are opened at both ends of the expansion sleeve, making it possible to expand the expansion sleeve evenly.

[0012] The main body of the moving part includes a moving group pressing plate and a cylindrical module fixedly connected. The frustum structure is arranged at the bottom of the cylindrical module, and the moving group pressing plate cooperates with the guiding structure. The frustum structure and the cylindrical module are fixedly connected by bolts.

[0013] The guiding structure includes a linear bearing fixed on the main body of the moving part and a guide post matched with the linear bearing. The guide post is fixed on the fixed part. The guide post is assembled with interference fit or fixed connection by bolts. The linear bearing is fixedly connected to the moving group pressing plate of the main body of the moving part by bolts.

[0014] The fixed part includes a fixed pedestal, and the positioning sleeve is fixed on the fixed pedestal by bolts.

[0015] The device applicable to the assembly of high-strength magnetic magnets of the present utility model has the following technical effects.

[0016] First, it has a simple structure and is easy to operate. There is no need to customize special equipment, and the investment is small.

[0017] Second, a swelling sleeve mechanism is ingeniously designed, and the taper is reasonably utilized to complete the clamping and relaxation of the work.

[0018] Third, the principle of the spring generating elastic force is reasonably utilized to overcome the magnetic attraction of the magnet during the assembly process, making the high-strength magnetic assembly feasible.

[0019] Fourth, by utilizing the straightness of the guide pillar, the straightness of the moving part during the up and down movement is ensured, and further the concentricity of the workpiece assembly is ensured. Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings:

[0021] Figure 1 It is a schematic diagram of the device applicable to the assembly of high-strength magnetic magnets. Among them, the magnet 92 is tightened on the swelling sleeve 11;

[0022] Figure 2 It is a schematic diagram of the movement part 10 descending and the magnet 92 cooperating with the iron core 91;

[0023] Figure 3 It is a schematic diagram of the movement part 10 ascending and resetting after the magnet 92 cooperates with the iron core 91;

[0024] Figure 4 It is a combined structure schematic diagram of the fixed part 20 and the guiding structure 30;

[0025] Figure 5 It is a cross-sectional view of the movement part 10;

[0026] Figure 6 It is a schematic diagram of the magnet 92 sleeved around the swelling sleeve 11;

[0027] Figure 7 It is a schematic diagram of the swelling sleeve 11 tightening the magnet 92 after the axial displacement;

[0028] Figure 8 It is a schematic diagram of the swelling sleeve 11;

[0029] Figure 9 It is a top view schematic diagram of the swelling sleeve 11;

[0030] Figure 10 For Figure 9 bottom view;

[0031] Figure 11 is Figure 10 a sectional view of

[0032] Description of symbols in the figure:

[0033] 10. Moving part; 11. Expansion sleeve; 111. Notch; 12. Expansion sleeve pressing plate; 121. Annular flange; 130. Frustum structure; 131. Limiting platform; 14. Long bolt; 15. Moving group pressing plate; 16. Cylindrical module;

[0034] 20. Fixed part; 21. Positioning sleeve; 210. Fixed bolt hole; 22. Fixed pedestal;

[0035] 30. Guiding structure; 31. Spring; 32. Linear bearing; 33. Guide post;

[0036] 91. Iron core; 92. Magnet. Specific implementation method

[0037] As Figure 1 , Figure 5 , Figure 8 , a device suitable for assembling strong magnetic magnets, including a moving part 10 and a fixed part 20 arranged up and down, and a guiding structure 30 connecting the fixed part and the moving part. The fixed part includes a positioning sleeve 21 for positioning the iron core 91 and a fixing bolt screwed on the side wall of the positioning sleeve to limit the iron core. The moving part 10 includes an expansion sleeve 11 and an expansion sleeve pressing plate 12. The outer side of the expansion sleeve is a straight wall structure, and the inner side of the expansion sleeve is a conical structure. A plurality of circumferentially distributed notches 111 are provided on the expansion sleeve. The bottom of the main body of the moving part is a frustum structure 130. A long bolt 14 connects the expansion sleeve pressing plate and the main body of the moving part. The expansion sleeve pressing plate presses the expansion sleeve on the frustum structure. The conical structure of the expansion sleeve cooperates with the frustum structure. The guiding structure 30 is equipped with a spring 31, and the spring is located between the moving part and the fixed part.

[0038] Refer to Figure 6 , Figure 7 , and Figures 1 to 3, the magnet 92 is sleeved on the periphery of the expansion sleeve 11, and the long bolt 14 is actuated. The long bolt pulls the expansion sleeve pressure plate 12, and the expansion sleeve pressure plate presses the expansion sleeve 11 to make it move axially. Since the conical structure of the expansion sleeve 11 cooperates with the truncated cone structure 130, the axial movement of the expansion sleeve increases its outer diameter, which is tightened in the magnet 92, so that the magnet is positioned on the expansion sleeve 11. The iron core 91 is positioned in the positioning sleeve 21, and the fixing bolts screwed on the side wall of the positioning sleeve are radially displaced and abut against the outer wall of the iron core 91, so that the iron core is fixed in the positioning sleeve 21. The moving part 10 moves downward together with the magnet 92 through the guide structure 30, and the spring 31 matched with the guide structure is compressed. The guide structure 30 ensures the concentricity of the moving part 10 and the fixed part 20 that move up and down. The magnet 92 contacts the iron core 91, indicating that the moving part 10 moves downward into place. At this time, the fixing bolts for fixing the iron core 91 are loosened, and the downward pressure on the moving part 10 is removed. Under the action of the spring 31, the magnet 92 and the iron core 91 that are magnetically attracted together move upward together with the moving part 10, and the moving part moves away from the fixed part 20, completing the assembly process of the magnet and the iron core.

[0039] like Figure 5 The truncated cone structure 130 is equipped with a limiting platform 131, which can abut against one end face of the expansion sleeve 11 away from the expansion sleeve pressure plate 12 to limit the movement of the expansion sleeve. Under the pull of the long bolt 14, the expansion sleeve pressure plate 12 acts on the expansion sleeve 11 to make it axially displaced in the direction of the limiting platform 131. The expansion sleeve 11 abuts against the limiting platform 131, and the expansion sleeve 11 reaches the maximum displacement.

[0040] The expansion sleeve pressing plate 12 is provided with an annular flange 121, which abuts against the expansion sleeve 11. When the expansion sleeve pressing plate 12 presses the expansion sleeve 11 to axially displace along the truncated cone structure 130, the end of the truncated cone structure can penetrate into the annular flange 121, and the hollow structure of the annular flange provides a clearance space for the truncated cone structure 130, ensuring smooth axial displacement of the expansion sleeve.

[0041] The expansion sleeve pressure plate 12 is provided with a threaded hole, and the moving part body is provided with a through hole, and the long bolt 14 passes through the through hole and is screwed to the threaded hole. The operator uses a tool to screw the long bolt 14, and the long bolt drives the expansion sleeve pressure plate 12, and the expansion sleeve pressure plate drives the expansion sleeve 11 to axially move.

[0042] Combination Figures 8 to 11 The expansion sleeve 11 has notches 111 at both ends, and the notches at both ends of the expansion sleeve are arranged alternately along the circumference of the expansion sleeve. The notches 111 make it possible for the expansion sleeve 11 to be expanded. The notches at both ends of the expansion sleeve make it possible for the expansion sleeve 11 to be expanded evenly.

[0043] like Figure 5, the main body of the moving part includes a moving group pressure plate 15 and a cylindrical module 16 that are fixedly connected. The frustum structure 130 is arranged at the bottom of the cylindrical module, and the moving group pressure plate cooperates with the guiding structure 30. The frustum structure 130 and the cylindrical module 16 are fixedly connected by bolts.

[0044] Reference Figure 1 , Figure 4 , the guiding structure 30 includes a linear bearing 32 fixed on the main body of the moving part and a guide post 33 that cooperates with the linear bearing. The guide post is fixed on the fixed part 20. The guide post 33 is assembled with interference fit or fixedly connected by bolts. The linear bearing 32 is fixedly connected to the moving group pressure plate 15 of the main body of the moving part by bolts.

[0045] The fixed part 20 includes a fixed pedestal 22, and the positioning sleeve 21 is fixed on the fixed pedestal. The positioning sleeve 21 and the fixed pedestal 22 are fixedly connected by bolts.

[0046] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A device applicable to the assembly of high-strength magnets, comprising a moving part (10) and a fixed part (20) arranged vertically, and a guiding structure (30) connecting the fixed part and the moving part. The fixed part includes a positioning sleeve (21) for positioning an iron core (91), and a fixing bolt screwed on the side wall of the positioning sleeve to limit the iron core. It is characterized in that: The moving part (10) includes a expansion sleeve (11) and a expansion sleeve pressing plate (12). The outer side of the expansion sleeve is a straight wall structure, and the inner side of the expansion sleeve is a conical structure. A plurality of circumferentially distributed notches (111) are formed on the expansion sleeve. The bottom of the main body of the moving part is a frustum structure (130). A long bolt (14) connects the expansion sleeve pressing plate and the main body of the moving part. The expansion sleeve pressing plate presses the expansion sleeve against the frustum structure. The conical structure of the expansion sleeve cooperates with the frustum structure; the guiding structure (30) is equipped with a spring (31), and the spring is located between the moving part and the fixed part.

2. The device applicable to the assembly of high-strength magnets according to claim 1, characterized in that: The frustum structure (130) is equipped with a limiting platform (131). The limiting platform can abut against the end face of the expansion sleeve (11) away from the expansion sleeve pressing plate (12) to limit the movement range of the expansion sleeve.

3. The device applicable to the assembly of high-intensity magnets as described in claim 1, characterized in that: The expansion sleeve pressing plate (12) is provided with an annular flange (121), and the annular flange abuts against the expansion sleeve (11).

4. The device applicable to the assembly of high-strength magnets as described in claim 1, characterized in that: Threaded holes are formed in the expansion sleeve pressing plate (12), and through holes are formed in the main body of the moving part. The long bolt (14) passes through the through hole and is screwed with the threaded hole.

5. The device applicable to the assembly of high-strength magnets according to claim 1, characterized in that: Notches (111) are formed at both ends of the expansion sleeve (11), and the notches at both ends of the expansion sleeve are arranged staggeredly along the circumference of the expansion sleeve.

6. The device applicable to the assembly of high-strength magnets as described in claim 1, characterized in that: The main body of the moving part includes a moving group pressing plate (15) and a cylindrical module (16) fixedly connected. The frustum structure (130) is arranged at the bottom of the cylindrical module. The moving group pressing plate cooperates with the guiding structure (30).

7. The device applicable to the assembly of high-strength magnets as described in claim 1, characterized in that: The guiding structure (30) includes a linear bearing (32) fixed on the main body of the moving part and a guide post (33) cooperating with the linear bearing. The guide post is fixed on the fixed part (20).

8. The device applicable to the assembly of high-strength magnets according to claim 1, wherein: The fixed part (20) includes a fixed pedestal (22), and the positioning sleeve (21) is fixed on the fixed pedestal.

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