Annular pressing equipment for fragile materials

Abstract

The utility model belongs to the technical field of high-speed permanent magnet motor production, and discloses an annular pressing device for brittle materials, which comprises a support frame used for supporting a rotor, a plurality of pressing assemblies used for pressing permanent magnets on the rotor are arranged in the support frame, the pressing assemblies are sequentially arranged at intervals from top to bottom, and the pressing assemblies are used for pressing the permanent magnets on the rotor. Each pressing assembly is installed on the supporting frame in a sliding mode in the axial direction of the supporting frame. According to the utility model, a multi-section type annular pressing structure is adopted, enough, appropriate and uniform pressing force is provided for the permanent magnet, and the problem that the permanent magnet is not installed in place is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed permanent magnet motor production, in particular to an annular pressing device for brittle materials. Background Art

[0002] The working principle of high-speed permanent magnet motor is based on the principle of electromagnetic induction. When current passes through the coil of the permanent magnet motor, a magnetic field will be generated around the coil. This magnetic field will interact with the permanent magnet, causing the permanent magnet to be subjected to a certain torque, thereby generating rotation.

[0003] During the operation of the motor, the motor rotor is inevitably in a high temperature environment, which requires the permanent magnets in the rotor to maintain sufficient magnetism in the high temperature environment. Among the many magnetic materials, samarium cobalt permanent magnets have excellent high temperature resistance, but this type of material has high brittleness.

[0004] During the production process of high-speed motor rotors using surface-mounted permanent magnets, the permanent magnets need to be bonded to the surface of the rotor core shaft. The use of metal glue requires a certain amount of curing time. The current method is to manually install and tighten it and then use cable ties to fix it.

[0005] The main problems with the above fixing method are: the width of the cable tie is relatively small, and the contact area between the cable tie and the permanent magnet is very small during fixing, which cannot provide sufficient clamping force for the installation of the permanent magnet. Moreover, the clamping force of the cable tie on the permanent magnet cannot be accurately controlled, and uneven clamping force may easily occur, resulting in improper installation of the permanent magnet. Utility Model Content

[0006] The main technical problem to be solved by the utility model is to provide an annular pressing device for brittle materials, which adopts a multi-stage annular pressing structure to provide sufficient, appropriate and uniform pressing force for the permanent magnet, solving the problem of improper installation of the permanent magnet.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A ring-shaped pressing device for brittle materials comprises a support frame for supporting a rotor, wherein a plurality of pressing assemblies for pressing permanent magnets on the rotor are arranged in the support frame, the pressing assemblies are arranged in sequence from top to bottom, and each pressing assembly is installed on the support frame along the axial direction of the support frame.

[0009] The following is a further optimization of the above technical solution by the utility model:

[0010] Each of the clamping assemblies comprises a pair of relatively arranged pressure rods, and a buffer pad for clamping the permanent magnet is fixed on the inner wall of each pressure rod, and the inner diameter of each buffer pad is adapted to the diameter of the middle section of the rotor, and the two ends of each pair of pressure rods are detachably mounted together by fastening bolts, and the two ends of each pair of pressure rods are slidably mounted on the support frame.

[0011] Further optimization: both ends of the inner wall of each buffer pad (32) are provided with large rounded corners.

[0012] Further optimization: the support frame includes a top plate and a base arranged opposite to each other up and down, and several pairs of fixed sliding rods are installed between the top plate and the base. All the fixed sliding rods are arranged in a ring with the axis of the top plate as the center, and each pair of fixed sliding rods is symmetrically arranged relative to the axis of the top plate, and at least one clamping assembly is installed on each pair of fixed sliding rods.

[0013] Further optimization: A thick-walled tube is provided at the center position of the top of the base, and an adapter sleeve for fixing the rotor is provided inside the thick-walled tube.

[0014] Further optimization: a buckling groove is provided on the inner wall of each of the two ends of the pressure rod, each buckling groove is adapted to the fixed slide rod, and both ends of each clamping assembly are sleeved on the corresponding fixed slide rod through the buckling groove.

[0015] Further optimization: each of the pressure rods includes a semicircular clamping portion, each buffer pad is removably installed on the inner wall of the clamping portion, both ends of each clamping portion are fixed with a mounting portion, and each snap-fitting groove is arranged on the inner wall of the mounting portion.

[0016] Further optimization: each of the fixed slide bars is threadedly mounted on the base, and the upper end of each fixed slide bar is detachably mounted on the top plate.

[0017] The utility model adopts the above technical solution and has the following beneficial effects:

[0018] 1. The utility model can realize one-time multi-stage pressing of the permanent magnets in the process of attaching brittle material permanent magnets to the surface of the high-speed motor rotor, provide a larger contact surface for the permanent magnets, and provide sufficient, uniform and appropriate pressing force, thus solving the problem of improper installation of the permanent magnets due to uneven force and insufficient pressing force.

[0019] 2. The multi-stage annular clamping structure is set up, and the clamping components are arranged at different axial positions of the rotor and staggered at a certain angle, so that a uniform and appropriate clamping force is applied to the permanent magnet to press the permanent magnet onto the rotor.

[0020] 3. During the pressing process, the buffer cushion block made of flexible material not only plays a buffering role, avoiding the damage of the permanent magnet caused by the direct contact and pressing between the rigid material and the permanent magnet, but also increases the friction force with the rotor, so that the pressing assembly is fixed at a certain position in the axial direction of the rotor. The present invention will be further described below in conjunction with the drawings and embodiments. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a three-dimensional schematic diagram of the overall structure in the embodiment of the present invention;

[0023] Figure 2 is Figure 1 the front view schematic diagram of

[0024] Figure 3 It is a three-dimensional schematic diagram of the support frame in the embodiment of the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of the pressing assembly in the embodiment of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the fixed slide bar in the embodiment of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the rotor in the embodiment of the present invention;

[0028] Figure 7 is Figure 6 the structural schematic diagram in the A-A direction of

[0029] Wherein: 1 - rotor; 11 - permanent magnet; 12 - core shaft; 2 - support frame; 21 - top plate; 22 - base; 221 - thick-walled tube; 222 - adapter sleeve; 23 - fixed slide bar; 3 - pressing assembly; 31 - pressing rod; 311 - pressing part; 312 - mounting part; 32 - buffer cushion block; 33 - fastening bolt; 34 - fastening groove. Detailed Embodiments

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figures 1-7 collectively shown, a ring-shaped pressing device for brittle materials includes a support frame 2 for supporting a rotor 1. A plurality of pressing components 3 for pressing permanent magnets 11 on the rotor 1 are arranged in the support frame 2. The pressing components 3 are sequentially arranged at intervals from top to bottom, and each pressing component 3 is slidably mounted on the support frame 2 along the axial direction of the support frame 2.

[0032] In this embodiment, the permanent magnet 11 is made of a brittle material, samarium cobalt magnet.

[0033] As Figure 6 and Figure 7 collectively shown, the rotor 1 includes a core shaft 12. A plurality of permanent magnets 11 are bonded to different angular and axial positions of the core shaft 12 through metal glue, and the distances between adjacent permanent magnets 11 are all the same.

[0034] As Figure 1 , Figure 2 and Figure 4 collectively shown, each pressing component 3 includes a pair of oppositely arranged pressure rods 31. A buffer cushion block 32 for pressing the permanent magnet 11 is fixed on the inner wall of each pressure rod 31. The inner diameter of each buffer cushion block 32 is adapted to the diameter of the middle section of the rotor 1. The two ends of each pair of pressure rods 31 are detachably installed together through fastening bolts 33, and the two ends of each pair of pressure rods 31 are slidably mounted on the support frame 2.

[0035] In this embodiment, by tightening the fastening bolts 33 at both ends, the distance between the two buffer cushion blocks 32 is reduced to apply a uniform and appropriate pressing force to the permanent magnet 11, so that the permanent magnet 11 is pressed on the core shaft 12, thereby ensuring the proper installation of the permanent magnet 11.

[0036] In this embodiment, the pressure rod 31 is designed to be flat and long. On the one hand, it increases the contact area between the buffer cushion block 32 and the permanent magnet 11. On the other hand, in the process of tightening the fastening bolt 33, the pressure rod 31 generates a certain deformation, avoiding the situation of applying excessive pressure to a certain position of the permanent magnet 11 and causing damage to it.

[0037] As Figure 4 shown, large round corners are provided at both ends of the inner wall of each buffer cushion block 32.

[0038] In this embodiment, the setting of the large fillet avoids the situation where a large pressing force is locally generated on the permanent magnet 11 due to the deformation of the pressure rod 31.

[0039] In this embodiment, the pressing components 3 are arranged at different axial positions of the rotor 1 and are staggered by a certain angle, eliminating the influence of the vacant positions caused by the large fillets at both ends of the buffer cushion block 32.

[0040] As Figures 1-3 collectively shown, the support frame 2 includes a top plate 21 and a base 22 that are oppositely arranged up and down. A plurality of pairs of fixed sliding rods 23 are jointly installed between the top plate 21 and the base 22. All the fixed sliding rods 23 are arranged in a ring centered on the axis of the top plate 21. Each pair of fixed sliding rods 23 is symmetrically arranged with respect to the axis of the top plate 21. At least one pressing component 3 is jointly installed on each pair of fixed sliding rods 23.

[0041] In this embodiment, the structure in which the pressing components 3 are staggered by a certain angle ensures the relative uniformity of the pressing force on each permanent magnet 11.

[0042] As Figure 3 shown, a thick-walled tube 221 is provided at the central position of the top of the base 22, and an adapter sleeve 222 for fixing the rotor 1 is arranged inside the thick-walled tube 221.

[0043] In this embodiment, the lower end of the core shaft 12 is inserted into the adapter sleeve 222, so that the rotor 1 is vertically arranged in the support frame 2 to perform the pressing and fixing work of the permanent magnet 11.

[0044] As Figure 1 and Figure 4 collectively shown, fastening grooves 34 are provided on the inner walls at both ends of each pressure rod 31. Each fastening groove 34 is adapted to the fixed sliding rod 23. Both ends of each pressing component 3 are sleeved on the corresponding fixed sliding rod 23 through the fastening grooves 34.

[0045] Among them, each pressure rod 31 includes a pressing part 311 in a semi-circular ring shape. Each buffer cushion block 32 is detachably installed on the inner wall of the pressing part 311. Installation parts 312 are fixed at both ends of each pressing part 311, and each fastening groove 34 is arranged on the inner wall of the installation part 312.

[0046] In this embodiment, the inner diameter of the buffer cushion block 32 is the same as the diameter of the middle section of the rotor 1, and the outer diameter of the buffer cushion block 32 is the same as the inner diameter of the pressing part 311.

[0047] In this embodiment, there is a certain gap between each pressing part 311 and the buffer cushion block 32, and the buffer cushion block 32 is fixedly installed on the pressing part 311 through bolts.

[0048] AsFigure 1 and Figure 5 As commonly shown, each fixed sliding rod 23 is threadedly installed on the base 22, and the upper end of each fixed sliding rod 23 is detachably installed together with the top plate 21.

[0049] In this embodiment, a lower threaded rod is provided at the lower end of each fixed sliding rod 23, and each fixed sliding rod 23 is threadedly installed on the base 22 through the lower threaded rod. An upper threaded rod is provided at the upper end of each fixed sliding rod 23. Each upper threaded rod passes through the top plate 21, and a locking nut is tightened at one end of each upper threaded rod extending out of the top of the top plate 21 to achieve the detachable installation between the fixed sliding rod 23 and the top plate 21.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ring-shaped pressing device for brittle materials, characterized in that: Comprising a support frame (2) for supporting a rotor (1), wherein a plurality of pressing assemblies (3) for pressing a permanent magnet (11) on the rotor (1) are arranged in the support frame (2), wherein the pressing assemblies (3) are arranged in sequence from top to bottom, and each pressing assembly (3) is slidably mounted on the support frame (2) along the axial direction of the support frame (2); Each of the pressing assemblies (3) comprises a pair of pressing rods (31) arranged opposite to each other, a buffer block (32) for pressing the permanent magnet (11) being fixed on the inner wall of each pressing rod (31), the inner diameter of each buffer block (32) being adapted to the diameter of the middle section of the rotor (1), both ends of each pair of pressing rods (31) being detachably mounted together by means of fastening bolts (33), and both ends of each pair of pressing rods (31) being slidably mounted on the support frame (2); Both ends of the inner wall of each buffer pad (32) are provided with large rounded corners; The support frame (2) comprises a top plate (21) and a base (22) which are arranged opposite to each other in an upper and lower manner. A plurality of pairs of fixed slide bars (23) are installed between the top plate (21) and the base (22). All the fixed slide bars (23) are arranged in a ring with the axis of the top plate (21) as the center. Each pair of fixed slide bars (23) is symmetrically arranged relative to the axis of the top plate (21). At least one clamping assembly (3) is installed on each pair of fixed slide bars (23).

2. The annular pressing device for brittle materials according to claim 1, characterized in that: A thick-walled tube (221) is provided at the center of the top of the base (22), and an adapter sleeve (222) for fixing the rotor (1) is provided inside the thick-walled tube (221).

3. The annular pressing device for brittle materials according to claim 2, characterized in that: The inner walls of both ends of each of the pressing rods (31) are provided with snap-fitting grooves (34), each snap-fitting groove (34) is matched with the fixed slide rod (23), and both ends of each pressing assembly (3) are sleeved on the corresponding fixed slide rod (23) through the snap-fitting grooves (34).

4. The annular pressing device for brittle materials according to claim 3, characterized in that: Each of the pressure rods (31) comprises a semicircular clamping portion (311), each buffer pad (32) is detachably mounted on the inner wall of the clamping portion (311), both ends of each clamping portion (311) are fixed with mounting portions (312), and each buckling groove (34) is arranged on the inner wall of the mounting portion (312).

5. The annular pressing device for brittle materials according to claim 4, characterized in that: Each of the fixed slide bars (23) is threadedly mounted on the base (22), and the upper end of each of the fixed slide bars (23) is detachably mounted on the top plate (21).

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