Permanent magnet mounting structure

Abstract

The utility model discloses a permanent magnet mounting structure, which comprises a rotor, a plurality of permanent magnets mounted on the outer wall of the rotor and magnetic isolation pressure bodies positioned between adjacent permanent magnets. The pressing piece comprises a first pressing surface for pressing one permanent magnet in a gapless manner, a second pressing surface for pressing the other adjacent permanent magnet in a gapless manner, and a bottom surface which is opposite to the outer wall of the rotor and is arranged in a gapless manner. The permanent magnet is completely pressed by the magnetic isolation pressing body, and the permanent magnet has no moving space, so that the permanent magnet has a higher fastening safety coefficient, and the collapse risk of a pressing piece and a fastening piece is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a permanent magnet installation structure. Background Art

[0002] Permanent magnets are the source of magnetic force that generates magnetic fields. The permanent magnets in permanent magnet motors are all installed on the rotor to generate a rotor magnetic field. The interaction between the rotor magnetic field and the stator magnetic field achieves the conversion of electrical energy into mechanical energy or mechanical energy into electrical energy. Commonly, permanent magnets are installed on the inner or outer surface of the rotor housing through magnetic isolation strips. Magnetic isolation strips are usually installed between adjacent permanent magnets and are made of non-magnetic materials to prevent adjacent permanent magnets of different polarities from generating large leakage magnetic flux here. The magnetic isolation strips are fastened to the rotor with screws. However, there is a space gap between the magnetic isolation strips and the permanent magnets, which results in space for the permanent magnets to move. When running for a long time, the permanent magnets move back and forth and frequently hit the magnetic isolation strips, so that there is a risk of damage to the magnetic isolation strips and screws. Utility Model Content

[0003] The utility model aims to provide a permanent magnet installation structure.

[0004] To achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a permanent magnet mounting structure, which includes a rotor, a plurality of permanent magnets mounted on the outer wall of the rotor and a magnetic isolation pressure body located between adjacent permanent magnets, the magnetic isolation pressure body includes a pressing piece and a fastener fixing the pressing piece to the rotor, the pressing piece includes a first pressing surface for pressing one of the permanent magnets without gap, a second pressing surface for pressing another adjacent permanent magnet without gap, and a bottom surface opposite to the outer wall of the rotor and with a gap set.

[0005] As a further improved technical solution of the utility model, inclined surfaces are respectively provided on both side ends of the permanent magnets, and intervals are formed between adjacent permanent magnets. The pressing piece is suspended in the intervals through the cooperation of the first pressing surface and the second pressing surface with the inclined surfaces.

[0006] As a further improved technical solution of the present invention, the angle between the first pressing surface and the second pressing surface is in the range of 80-89 degrees.

[0007] As a further improved technical solution of the utility model, the gap between the bottom surface and the outer wall of the rotor ranges from 0.5 to 0.8 mm.

[0008] As a further improved technical solution of the utility model, an adhesive layer is provided between the permanent magnet and the rotor.

[0009] As a further improved technical solution of the utility model, the fastener is a bolt or a screw.

[0010] As a further improved technical solution of the utility model, the pressing piece is an aluminum pressing piece.

[0011] As a further improved technical solution of the utility model, the magnetic isolation pressure body includes a long strip-shaped pressure body and a plurality of fasteners distributed at intervals along the direction of the long strip.

[0012] As a further improved technical solution of the utility model, the magnetic isolation pressure body includes a block-shaped pressure body and a fastener located at the center of the block.

[0013] As a further improved technical solution of the utility model, a plurality of block-shaped pressing bodies are arranged between adjacent permanent magnets and are distributed at intervals.

[0014] The utility model has the beneficial effects that the permanent magnet is completely pressed by the magnetic isolation pressing body, and the permanent magnet has no space to move, so that the permanent magnet has a higher fastening safety factor and eliminates the risk of collapse of the pressing piece and the fastener. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the permanent magnet installation structure of the utility model;

[0016] Figure 2 yes Figure 1 A partial enlarged view of the middle circle A;

[0017] Figure 3 It is a schematic diagram of a magnetic isolation pressure body of a permanent magnet installation structure of the utility model;

[0018] Figure 4 It is a schematic diagram of another magnetic isolation pressure body of the permanent magnet installation structure of the utility model. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. Please refer to the drawings for preferred embodiments of the present invention. However, it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformation or replacement of functions, methods, or structures made by ordinary technicians in the field according to these embodiments shall fall within the protection scope of the present invention.

[0020] The utility model discloses a permanent magnet installation structure, which includes a rotor, a plurality of permanent magnets installed on the outer wall of the rotor, and a magnetic isolation pressure body located between adjacent permanent magnets. The magnetic isolation pressure body includes a pressing piece and a fastener that fixes the pressing piece to the rotor, and the pressing piece includes a first pressing surface that presses a permanent magnet without gap, a second pressing surface that presses another adjacent permanent magnet without gap, and a bottom surface that is opposite to the outer wall of the rotor and is provided with a gap. The magnetic isolation pressure body completely presses the permanent magnet, and the permanent magnet has no space to move, so that the permanent magnet has a higher fastening safety factor, eliminating the risk of collapse of the pressing piece and the fastener.

[0021] Furthermore, inclined surfaces are respectively provided on both side ends of the permanent magnet, and a gap is formed between adjacent permanent magnets, and the pressing piece is suspended in the gap through the cooperation of the first pressing surface and the second pressing surface with the inclined surface. That is, the pressing piece is supported by the two adjacent permanent magnets through the inclined surface, and the pressing piece presses the inclined surface and then the permanent magnet through the first pressing surface and the second pressing surface. The pressing piece is fixed to the outer wall of the rotor through the fastener and effectively presses the permanent magnet. Because of the setting of the inclined surface, the pressing piece does not contact the rotor, thereby improving the fastening safety factor of the permanent magnet and eliminating the risk of collapse of the pressing piece and the fastener.

[0022] Furthermore, the angle between the first pressing surface and the second pressing surface is in the range of 80-89 degrees, which can stably press the inclined surface. Preferably, the angle between the first pressing surface and the second pressing surface is 83 degrees, 85 degrees, or 86 degrees.

[0023] Furthermore, the gap between the bottom surface and the outer wall of the rotor is in the range of 0.5-0.8 mm, which is a safe distance and can ensure the pressing effect.

[0024] Furthermore, an adhesive layer is provided between the permanent magnet and the rotor. The permanent magnet is further fixed to the rotor by the adhesive, which further improves the fastening safety system of the permanent magnet and provides double protection.

[0025] Furthermore, the fastener is a bolt or a screw, for example, a bolt or a screw with a specification of M6 or above, which has a good fastening force.

[0026] Furthermore, the pressing piece is an aluminum pressing piece, which is non-magnetic and has good pressing effect.

[0027] Furthermore, the magnetic isolation pressure body comprises a strip-shaped pressure body and a plurality of fasteners spaced apart along the strip direction. A magnetic isolation pressure body is provided between adjacent permanent magnets.

[0028] Furthermore, the magnetic isolation pressing body includes a block pressing body and a fastener located at the center of the block. A plurality of block pressing bodies are arranged between adjacent permanent magnets. Replacing the long strip pressing body with several block pressing bodies can reduce the aluminum material cost by more than 50% without affecting the pressing effect.

[0029] Please refer to the following Figures 1 to 4 , an example is given to describe the permanent magnet mounting structure 100 of the present invention.

[0030] Please refer to Figure 1 and Figure 3The utility model discloses a permanent magnet installation structure 100, which includes a rotor 1, a plurality of permanent magnets 2 installed on the outer wall of the rotor 1, and a magnetic isolation pressure body 3 located between adjacent permanent magnets 2. In this embodiment, the rotor 1 is cylindrical, and the plurality of permanent magnets 2 are arranged circumferentially on the inner outer wall of the rotor 1. In other embodiments, the plurality of permanent magnets can also be fixed on the outer wall of the rotor. The magnetic isolation pressure body 3 includes a pressing piece 31 and a fastener 32 for fixing the pressing piece 31 to the rotor 1. Among the plurality of permanent magnets 2, two randomly adjacent ones are defined as the first permanent magnet 21 and the second permanent magnet 22 as an example; it can be understood that for the convenience of understanding and clear description, the first permanent magnet 21 and the second permanent magnet 22 are the same permanent magnet 2 here. The pressing piece 31 includes a first pressing surface 311 for pressing the first permanent magnet 21 without gap, a second pressing surface 312 for pressing the adjacent second permanent magnet 22 without gap, and a bottom surface 313 opposite to the outer wall of the rotor 1 and provided with a gap. The magnetic isolation pressing body 3 completely presses the permanent magnet 2 , leaving no space for the permanent magnet 2 to move, so that the permanent magnet 2 has a higher fastening safety factor and eliminates the risk of collapse of the pressing piece 31 and the fastener 32 .

[0031] In this embodiment, the side end of the first permanent magnet 21 is provided with a first inclined surface 211, and the side end of the second permanent magnet 22 is provided with a second inclined surface 221. The first permanent magnet 21 and the second permanent magnet 22 are arranged at intervals, and the pressing piece 31 presses the first inclined surface 211 through the first pressing surface 311, and the second pressing surface 312 presses the second inclined surface 221 and is suspended in the interval, and the pressing piece 31 is then fixed to the inner outer wall of the rotor 1 through the fastener 32, thereby effectively pressing the first permanent magnet 21 and the second permanent magnet 22. And because of the support of the first inclined surface 211 and the second inclined surface 221, the pressing piece 31 is raised without contacting the rotor 1, thereby improving the fastening safety factor of the permanent magnet 2 and eliminating the risk of collapse of the pressing piece 31 and the fastener 32. The first pressing surface 311 and the second pressing surface 312 are distributed on both sides of the pressing piece 31 in an inverted eight-shaped shape, and the angle between the first pressing surface 311 and the second pressing surface 312 is 85 degrees, that is, the difference is 85 degrees. The gap between the bottom surface 313 and the outer wall of the rotor 1 is 0.6 mm. The fastener 32 is a bolt or a screw, for example, a bolt or a screw with a specification of M6 or above, which has a good fastening force. The pressing piece 31 is an aluminum pressing piece, which has the characteristics of being non-magnetic and having a good pressing effect.

[0032] In this embodiment, please refer to Figure 3 The magnetic isolation pressure body 3 includes a block-shaped pressure body 31 and a fastener 32 located at the center of the block. A plurality of block-shaped pressure bodies 31 are arranged between adjacent permanent magnets 2. The pressure bodies 31 directly contact the permanent magnets 2, and the permanent magnets 2 obtain a relatively stable fastening effect. The block-shaped pressure body 31 does not affect the pressing effect and can reduce the aluminum material cost by more than 50%. For other embodiments, please refer to Figure 4The magnetic isolation pressure body 4 includes a long strip pressure body 41 and a plurality of fasteners 42 spaced apart along the strip direction. A magnetic isolation pressure body 4 is included between adjacent permanent magnets 2 .

[0033] Furthermore, an adhesive layer (not shown) is provided between the permanent magnet 2 and the rotor 1. The permanent magnet 2 is further fixed to the rotor 1 by the adhesive, which further improves the fastening safety system of the permanent magnet 2 and obtains double protection.

[0034] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0035] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A permanent magnet installation structure, characterized in that: It includes a rotor, a plurality of permanent magnets mounted on the outer wall of the rotor, and a magnetic isolation pressure body located between adjacent permanent magnets. The magnetic isolation pressure body includes a pressure piece and a fastener fixing the pressure piece to the rotor. The pressure piece includes a first pressure surface for pressing one of the permanent magnets without a gap, a second pressure surface for pressing another adjacent permanent magnet without a gap, and a bottom surface opposite to the outer wall of the rotor and with a gap set.

2. The permanent magnet installation structure according to claim 1, characterized in that: Inclined surfaces are respectively provided at both side ends of the permanent magnets, and intervals are formed between adjacent permanent magnets. The pressing piece is suspended in the intervals through the cooperation of the first pressing surface and the second pressing surface with the inclined surfaces.

3. The permanent magnet installation structure according to claim 1, characterized in that: The included angle between the first pressing surface and the second pressing surface is in the range of 80-89 degrees.

4. The permanent magnet installation structure according to claim 1, characterized in that: The gap between the bottom surface and the outer wall of the rotor is in the range of 0.5-0.8 mm.

5. The permanent magnet installation structure according to claim 1, characterized in that: An adhesive layer is arranged between the permanent magnet and the rotor.

6. The permanent magnet installation structure according to claim 1, characterized in that: The fastener is a bolt or a screw.

7. The permanent magnet installation structure according to claim 1, characterized in that: The pressing piece is an aluminum pressing piece.

8. The permanent magnet installation structure according to claim 1, characterized in that: The magnetic isolation pressing body comprises a long strip pressing body and a plurality of fasteners spaced apart along the strip direction.

9. The permanent magnet installation structure according to claim 1, characterized in that: The magnetic isolation pressing body comprises a block-shaped pressing body and a fastener located at the center of the block.

10. The permanent magnet installation structure according to claim 9, characterized in that: A plurality of block-shaped pressing bodies are arranged between adjacent permanent magnets and are distributed at intervals.

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