Fixing device for permanent magnet of permanent magnet motor

Abstract

The utility model belongs to the technical field of permanent magnet motor equipment, and particularly relates to a fixing device for a permanent magnet of a permanent magnet motor, which comprises a shell, a plurality of first clamping grooves uniformly distributed on the inner wall of the shell, a plurality of threaded holes uniformly distributed on the side wall of the shell, and two fixing plates, and a first clamping block is fixedly mounted on the outer side of each fixing plate; the fixing plates are attached to the inner wall of the shell, a plurality of second clamping grooves are evenly distributed in the inner wall of each fixing plate, and a third clamping groove is formed in the side end of each fixing plate; a plurality of second clamping blocks are fixedly installed at the side end of the permanent magnet, the side wall of the permanent magnet is attached to the inner wall of the fixing plate, and the second clamping blocks are located in the second clamping grooves; and the side end of the cover plate is fixedly provided with a third clamping block, the third clamping block is matched with the third clamping groove, the upper end of the cover plate is provided with a through hole, the through hole is matched with the threaded hole, and the cover plate, the fixing plate and the shell are fixed through screws.

Description

Technical Field

[0001] The utility model belongs to the technical field of permanent magnet motor equipment, in particular to a fixing device for a permanent magnet of a permanent magnet motor. Background Art

[0002] Magnets that can maintain their magnetism for a long time are called permanent magnets, such as natural magnets (magnetite) and artificial magnets (aluminum-nickel-cobalt alloys). In addition to permanent magnets, there are also electromagnets that need to be powered to have magnetism. Permanent magnets are also called hard magnets. They are not easy to lose magnetism or be magnetized. However, if the permanent magnet is heated above the Curie temperature, or is placed in an environment with reverse high magnetic field strength, its magnetism will also decrease or disappear.

[0003] Some magnets are brittle and may break at high temperatures. The maximum operating temperature of AlNiCo magnets exceeds 540°C, that of SmCo magnets and ferrites is about 300°C, and that of Nd magnets and soft magnets is about 140°C. However, the actual value will still vary depending on the grain size of the material. Permanent magnets are also widely used in motors. The rotor of a permanent magnet motor is made of permanent magnets. However, there is a risk that the permanent magnets will become loose after being installed on the rotor for a long time. Therefore, a fixing device for the permanent magnet of a permanent magnet motor rotor is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a device for fixing permanent magnets of a permanent magnet motor.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A device for fixing a permanent magnet of a permanent magnet motor, comprising:

[0007] A housing is provided inside the housing, a plurality of first slots are evenly distributed on the inner wall of the housing, and a plurality of threaded holes are evenly distributed on the side wall of the housing.

[0008] A fixing plate, wherein there are two fixing plates, both of which are semicircular ring structures, a first clamping block is fixedly installed on the outer side of each fixing plate, and the first clamping block is adapted to the first clamping groove; the fixing plate is fitted with the inner wall of the shell, a plurality of second clamping grooves are evenly distributed on the inner wall of each fixing plate, and a third clamping groove is opened at the side end of each fixing plate;

[0009] A permanent magnet, wherein a plurality of second clamping blocks are fixedly mounted on the side ends of the permanent magnet, the second clamping blocks are matched with the second clamping slots, the permanent magnet is mounted in the accommodating cavity of the housing, the side wall of the permanent magnet is fitted with the inner wall of the fixing plate, and the second clamping blocks are located in the second clamping slots;

[0010] A cover plate, a third clamping block is fixedly installed on the side end of the cover plate, the third clamping block is matched with the third clamping slot, a through hole is opened on the upper end of the cover plate, the through hole is matched with the threaded hole, and the cover plate, the fixing plate and the shell are fixed by screws.

[0011] Furthermore, a rotor core is installed inside the permanent magnet, and a central shaft is installed inside the rotor core.

[0012] Furthermore, one end of the central rotating shaft is located in the accommodating cavity of the shell, and the other end of the central rotating shaft passes through the shell and is located outside the shell. A slip ring is fixedly installed on the side end of the central rotating shaft located outside the shell.

[0013] Furthermore, a dust shield ring is fixedly mounted on the side end of the shell, and the dust shield ring is located outside the central rotating shaft.

[0014] Furthermore, the cover plate is provided with a plurality of heat dissipation holes, and the plurality of heat dissipation holes are evenly distributed on the cover plate.

[0015] Furthermore, the shell is made of stainless steel, and the permanent magnet is made of cobalt-nickel alloy.

[0016] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0017] Fixed connection: refers to a connection in which parts or components are fixed without any relative movement. It is divided into detachable connection and non-detachable connection.

[0018] (1) Removable connection: The parts are fixed together by screws, splines, wedge pins, etc. This connection method can be disassembled for maintenance without damaging the parts. However, the specifications of the connectors used must be correct (such as the length of the bolts, keys, and wedge pins) and they must be properly tightened.

[0019] (2) Non-detachable connection: mainly refers to welding, riveting and tenoning. Since forging, sawing or oxygen cutting are required for disassembly during maintenance or replacement, spare parts generally cannot be reused. At the same time, attention should be paid to process quality, technical inspection and remedial measures (such as calibration, polishing, etc.) during connection.

[0020] The beneficial effects of the utility model are as follows: the permanent magnet motor is installed in the accommodating cavity of the shell through the cooperation between the shell, two fixing plates, the cover plate and the screws, and the permanent magnet is fixed by the cooperation between the second slot and the second clamping block, which effectively prevents the permanent magnet from being loosened after being installed on the rotor core for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the overall device of the embodiment of the utility model;

[0023] Figure 2 It is a cross-sectional view of the overall device of the embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the structure of the housing of an embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the fixing plate of the embodiment of the utility model;

[0026] Figure 5 It is a schematic structural diagram of a permanent magnet in an embodiment of the utility model;

[0027] Figure 6 It is a structural schematic diagram of a cover plate according to an embodiment of the utility model.

[0028] Figure numerals: 1. outer shell; 2. accommodating cavity; 3. first card slot; 4. threaded hole; 5. fixing plate; 6. first card block; 7. second card slot; 8. third card slot; 9. permanent magnet; 10. second card block; 11. cover plate; 12. third card block; 13. through hole; 14. screw; 15. rotor core; 16. central shaft; 17. slip ring; 18. dust shield ring; 19. heat dissipation hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] A permanent magnet fixing device for a permanent magnet motor, such as Figure 1 to Figure 6 As shown, including:

[0031] A housing 1 is provided with a receiving cavity 2 inside the housing 1, a plurality of first slots 3 are evenly distributed on the inner wall of the housing 1, and a plurality of threaded holes 4 are evenly distributed on the side wall of the housing 1.

[0032] A fixing plate 5, wherein there are two fixing plates 5, both of which are semicircular ring structures, and a first clamping block 6 is fixedly installed on the outer side of each fixing plate 5, and the first clamping block 6 is adapted to the first clamping groove 3; the fixing plate 5 is fitted with the inner wall of the housing 1, and a plurality of second clamping grooves 7 are evenly distributed on the inner wall of each fixing plate 5, and a third clamping groove 8 is opened at the side end of each fixing plate 5;

[0033] A permanent magnet 9, a plurality of second clamping blocks 10 are fixedly mounted on the side ends of the permanent magnet 9, the second clamping blocks 10 are adapted to the second clamping slots 7, the permanent magnet 9 is mounted in the accommodating cavity 2 of the housing 1, the side wall of the permanent magnet 9 is fitted with the inner wall of the fixing plate 5, and the second clamping blocks 10 are located in the second clamping slots 7;

[0034] A cover plate 11, a third clamping block 12 is fixedly mounted on the side end of the cover plate 11, the third clamping block 12 is matched with the third clamping slot 8, a through hole 13 is opened on the upper end of the cover plate 11, the through hole 13 is matched with the threaded hole 4, and the cover plate 11, the fixing plate 5 and the housing 1 are fixed by screws 14;

[0035] In this permanent magnet motor, when installing the permanent magnet 9, first install the two fixing plates 5 in the accommodating cavity 2 of the shell 1, and the first clamping block 6 at the side end of the fixing plate 5 needs to be located in the first clamping groove 3 of the inner wall of the shell 1, and then install the permanent magnet 9 in the accommodating cavity 2 of the shell 1, and the second clamping block 10 at the side end of the permanent magnet 9 needs to be located in the second clamping groove 7 on the inner wall of the fixing plate 5, and then install the cover plate 11 on the side end of the shell 1, at this time, the third clamping block 12 at the side end of the cover plate 11 needs to be located in the third clamping groove 8 at the side end of the fixing plate 5, and then fix the shell 1, the fixing plate 5 and the cover plate 11 by passing the screw 14 through the through hole 13 and the screw 14 hole, and at this time, the permanent magnet 9 is fixed in the accommodating cavity 2 of the shell 1, and the two ends of the permanent magnet 9 are respectively fitted with the bottom of the shell 1 and the cover plate 11.

[0036] As a preferred embodiment of the present invention, Figure 2 As shown, a rotor core 15 is installed inside the permanent magnet 9 , and a central shaft 16 is installed inside the rotor core 15 .

[0037] As a preferred embodiment of the present invention, Figure 1 , Figure 2 As shown, one end of the central shaft 16 is located in the accommodating cavity 2 of the shell 1, and the other end of the central shaft 16 passes through the shell 1 and is located outside the shell 1. A slip ring 17 is fixedly installed on the side end of the central shaft 16 located outside the shell 1.

[0038] As a preferred embodiment of the present invention, Figure 1As shown, a dust shield ring 18 is fixedly installed on the side end of the shell 1, and the dust shield ring 18 is located on the outside of the central rotating shaft 16; the dust shield ring 18 is set to block the external dust of the permanent magnet motor during operation, prevent a large amount of dust from entering the shell 1 and affecting the operation of the permanent magnet motor.

[0039] As a preferred embodiment of the present invention, Figure 6 As shown, the cover plate 11 is provided with a plurality of heat dissipation holes 19 , and the plurality of heat dissipation holes 19 are evenly distributed on the cover plate 11 ; the heat dissipation holes 19 are provided to facilitate heat dissipation of the permanent magnet motor during operation.

[0040] As a preferred solution of the present invention, the housing 1 is made of stainless steel, and the permanent magnet 9 is made of cobalt-nickel alloy.

[0041] The working principle and use process of this utility model:

[0042] In the permanent magnet motor, when installing the permanent magnet 9, first install the two fixing plates 5 in the accommodating cavity 2 of the shell 1, the first clamping block 6 at the side end of the fixing plate 5 needs to be located in the first clamping groove 3 of the inner wall of the shell 1, and then install the permanent magnet 9 in the accommodating cavity 2 of the shell 1, the second clamping block 10 at the side end of the permanent magnet 9 needs to be located in the second clamping groove 7 on the inner wall of the fixing plate 5, install the rotor core 15 on the inner side of the permanent magnet 9, and install one end of the central shaft 16 on the inner side of the rotor core 15, and then install the cover plate 11 on the side end of the shell 1, at this time, the third clamping block 12 at the side end of the cover plate 11 needs to be located in the third clamping groove 8 at the side end of the fixing plate 5, and then fix the shell 1, the fixing plate 5 and the cover plate 11 by passing the screw 14 through the through hole 13 and the screw 14 hole, at this time, the permanent magnet 9 is fixed in the accommodating cavity 2 of the shell 1, and the two ends of the permanent magnet 9 are respectively fitted with the bottom of the shell 1 and the cover plate 11.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A permanent magnet fixing device for a permanent magnet motor, characterized in that: include: A housing (1), wherein a receiving cavity (2) is provided inside the housing (1), a plurality of first slots (3) are evenly distributed on the inner wall of the housing (1), and a plurality of threaded holes (4) are evenly distributed on the side wall of the housing (1); A fixing plate (5), wherein there are two fixing plates (5), both of which are semicircular ring structures, a first clamping block (6) is fixedly mounted on the outer side of each fixing plate (5), and the first clamping block (6) is adapted to the first clamping groove (3); the fixing plate (5) is fitted with the inner wall of the housing (1), a plurality of second clamping grooves (7) are evenly distributed on the inner wall of each fixing plate (5), and a third clamping groove (8) is provided on the side end of each fixing plate (5); A permanent magnet (9), wherein a plurality of second clamping blocks (10) are fixedly mounted on the side ends of the permanent magnet (9), the second clamping blocks (10) are matched with the second clamping grooves (7), the permanent magnet (9) is mounted in the accommodating cavity (2) of the housing (1), the side wall of the permanent magnet (9) is in contact with the inner wall of the fixing plate (5), and the second clamping blocks (10) are located in the second clamping grooves (7); A cover plate (11), a third clamping block (12) is fixedly mounted on the side end of the cover plate (11), the third clamping block (12) is matched with the third clamping slot (8), a through hole (13) is opened at the upper end of the cover plate (11), the through hole (13) is matched with the threaded hole (4), and the cover plate (11), the fixing plate (5) and the housing (1) are fixed by screws (14).

2. A permanent magnet motor permanent magnet (9) fixing device according to claim 1, characterized in that: A rotor core (15) is installed inside the permanent magnet (9), and a central rotating shaft (16) is installed inside the rotor core (15).

3. A permanent magnet motor permanent magnet (9) fixing device according to claim 2, characterized in that: One end of the central rotating shaft (16) is located in the accommodating cavity (2) of the outer shell (1), and the other end of the central rotating shaft (16) passes through the outer shell (1) and is located outside the outer shell (1). A slip ring (17) is fixedly installed on the side end of the central rotating shaft (16) located outside the outer shell (1).

4. A permanent magnet motor permanent magnet (9) fixing device according to claim 3, characterized in that: A dust shield ring (18) is fixedly mounted on the side end of the housing (1), and the dust shield ring (18) is located outside the central rotating shaft (16).

5. A permanent magnet motor permanent magnet (9) fixing device according to claim 4, characterized in that: The cover plate (11) is provided with a plurality of heat dissipation holes (19), and the plurality of heat dissipation holes (19) are evenly distributed on the cover plate (11).

6. A permanent magnet motor permanent magnet (9) fixing device according to claim 5, characterized in that: The housing (1) is made of stainless steel, and the permanent magnet (9) is made of cobalt-nickel alloy.

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