Rotor heat insulation structure of air cooling motor

Abstract

The utility model relates to the technical field of motors, in particular to a rotor heat insulation structure of an air cooling motor, which comprises a mounting plate detachably connected with a main shaft of a rotor through bolts, a positioning column formed on a matching surface of the mounting plate and the rotor, and a heat insulation cover fixedly connected with the mounting plate, a cavity for accommodating the rotor is formed by the mounting plate and the mounting plate; according to the utility model, heat can be prevented from being transmitted to the rotor through the heat insulation cover, so that stable operation of the rotor is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor heat insulation structure of an air-cooled motor. Background Art

[0002] An air-cooled motor is a type of motor classified according to the motor cooling method. It mainly cools the motor by means of air to ensure the normal operation of the motor. Among them, a permanent magnet motor belongs to a major category of air-cooled motors, which is different from an electromagnetic motor.

[0003] A permanent magnet motor is a motor that converts electrical energy into mechanical energy by means of permanent magnets. It has the advantage of high efficiency and is widely used. At present, the permanent magnets in permanent magnet motors are installed on either the stator or the rotor, and in most cases, they are installed on the rotor. For example, the improved structure of an electronic rotor disclosed in the authorized publication number CN202997741U is a motor rotor with permanent magnets. When it cooperates with the stator, the stator is energized and a magnetic field is generated through the windings on the electronics to act on the magnetic field of the permanent magnets, so that the rotor rotates and the purpose of power output is achieved.

[0004] However, at present, although there is a gap between the rotor and the stator of a permanent magnet motor, there is no isolation member to isolate the two. Therefore, the heat generated by the stator will directly flow towards the rotor, resulting in the rotor working at a high temperature for a long time, thus affecting the service life of the rotor.

[0005] In summary, improvements are needed. Content of the Utility Model

[0006] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a rotor heat insulation structure of an air-cooled motor, aiming to solve the problems presented in the above background art.

[0007] The technical solution of the utility model is realized as follows: A rotor heat insulation structure of an air-cooled motor, characterized by comprising:

[0008] A mounting plate, detachably connected to the main shaft of the rotor by bolts;

[0009] Positioning columns, formed on the mating surface of the mounting plate and the rotor, and positioning cavities adapted to the positioning columns are formed on the rotor;

[0010] A heat insulation cover, fixedly connected to the mounting plate and forming a chamber for accommodating the rotor with the mounting plate;

[0011] Wherein, the mounting plate and the heat insulation cover are coaxially arranged.

[0012] Preferably: The heat insulation cover includes:

[0013] A cover body, the cross-sectional shape of which is annular;

[0014] A positioning edge integrally formed at one end of the cover body;

[0015] A positioning groove recessed at the other end of the cover body and adapted to the positioning edge;

[0016] A clamping portion formed on the positioning edge;

[0017] A clamping groove formed at the bottom of the positioning groove and adapted to the clamping portion.

[0018] Preferably, a jack communicating with the clamping groove is provided on the cover body.

[0019] Preferably, the clamping portion includes:

[0020] A connecting block connected to the positioning edge;

[0021] A clamping block hinged to the connecting block through a rotating shaft;

[0022] A spring connected between the clamping block and the connecting block.

[0023] Preferably, a threaded cavity penetrating through the cover body is formed on the cover body, and a pressing bolt adapted to the threaded cavity is provided in the threaded cavity.

[0024] Preferably, the threaded cavity includes:

[0025] A threaded hole;

[0026] A limiting cavity coaxially communicating with the threaded hole and having a cross-sectional diameter larger than that of the threaded hole.

[0027] Preferably, the pressing bolt includes:

[0028] A bolt body adapted to the threaded hole;

[0029] A limiting body fixedly connected to one end of the bolt body and adapted to the limiting cavity;

[0030] Wherein, a rubber protrusion is fixedly connected to the end of the limiting body far from the bolt body.

[0031] The utility model has at least the following beneficial effects:

[0032] 1. The rotor heat insulation structure provided by the utility model can effectively surround the rotor, so that the heat transmitted to the rotor can be isolated, and the continuous operation of the rotor at high temperature can be avoided, thus ensuring the service life of the rotor.

[0033] 2. The heat insulation structure of the utility model can be spliced according to the length of the rotor, that is, by clamping a plurality of cover bodies with each other, the length of the heat insulation structure can be extended, so as to adapt to rotors of different sizes.

[0034] Other advantages of the present utility model will be shown in the embodiment part of the present utility model, so that the beneficial effects of the present utility model will be more remarkable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 Structural schematic diagram of Specific Embodiment 1 of the present utility model;

[0037] Figure 2 is Figure 1 A - A cross-sectional view in

[0038] Figure 3 Structural schematic diagram of the rotor in Specific Embodiment 1 of the present utility model;

[0039] Figure 4 is Figure 3 B - B cross-sectional view in

[0040] Figure 5 Structural schematic diagram of Specific Embodiment 2 of the present utility model;

[0041] Figure 6 Structural schematic diagram of Specific Embodiment 3 of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0043] Embodiment 1

[0044] As Figures 1-4 shown, the present utility model discloses an air-cooled motor, including: a housing 10, a stator 11 arranged in the housing 10, and a rotor 12. Among them, the rotor heat insulation structure of this embodiment is arranged between the stator 11 and the rotor 12.

[0045] In this embodiment, the rotor 12 has a main shaft 120 which is rotatably connected to the housing 10, and a bearing 10d for supporting the main shaft 120 is provided on the housing 10. The rotor 12 also has a permanent magnet 121 which is arranged on the outer wall of the rotor 12.

[0046] In this embodiment, an air inlet 10a, an air outlet 10b and a cooling cavity 10c communicating with the air inlet 10a and the air outlet 10b are provided on the housing 10. During heat dissipation, the air pump supplies air to the cooling cavity 10c through the air inlet 10a, and the air flows around the stator and then is discharged from the air outlet 10b to complete the heat dissipation of the stator 11.

[0047] In this embodiment, a rotor heat insulation structure 2 is arranged on the rotor 12, which includes:

[0048] A mounting plate 20 which is detachably connected to the main shaft 120 of the rotor 12 by bolts 21;

[0049] A positioning post 22 which is formed on the mating surface of the mounting plate 20 and the rotor 12, and a positioning cavity adapted to the positioning post 22 is formed on the rotor 12;

[0050] A heat insulation cover 23 which is fixedly connected to the mounting plate 20 and forms a chamber for accommodating the rotor 12 with the mounting plate 20;

[0051] Wherein, the mounting plate 20 and the heat insulation cover 23 are coaxially arranged.

[0052] In this embodiment, the main shaft 120, the rotor 12, the mounting plate 20 and the heat insulation cover 23 are all coaxially arranged.

[0053] In this embodiment, the main shaft 120 is connected to the rotor 12 through the mounting plate 20.

[0054] Reference Figures 1-4 , the advantages of this embodiment are: a heat insulation cover is arranged on the rotor, and the heat insulation cover can prevent the heat generated by the stator from directly flowing towards the rotor, thereby protecting the rotor.

[0055] Embodiment 2, the difference from Embodiment 1 is:

[0056] As Figure 5 shown, in this embodiment, the heat insulation cover 23 includes:

[0057] A cover body 230 with an annular cross-sectional shape;

[0058] A positioning edge 231 which is integrally formed at one end of the cover body 230;

[0059] The positioning groove 232 is recessed at the other end of the cover body 230 and is adapted to the positioning edge 231. To achieve the detachable connection between the cover body 230 and the mounting plate 20, the positioning groove 232 can also be provided on the mounting plate 20;

[0060] The clamping portion 234 is formed on the positioning edge 231;

[0061] The clamping groove 235 is formed at the bottom of the positioning groove 232 and is adapted to the clamping portion 234.

[0062] In this embodiment, a jack 236 communicating with the clamping groove 235 is provided on the cover body 230.

[0063] In this embodiment, the clamping portion 234 includes:

[0064] The connecting block 30 is connected to the positioning edge 231;

[0065] The clamping block 31 is hinged to the connecting block 30 through a rotating shaft 32;

[0066] The spring 33 is connected between the clamping block 31 and the connecting block 30.

[0067] Reference Figure 5 , the advantages of this embodiment are:

[0068] The heat shield of this embodiment can adapt to rotors of different lengths, that is: the cover body of this embodiment can be assembled with each other through the clamping portion and the clamping groove or assembled with the mounting plate, so the length of the heat shield can be increased.

[0069] During assembly, according to the adaptation of the positioning edge and the positioning groove, the clamping portion can be inserted into the clamping groove, and the assembly can be completed through the clamping block. During disassembly, a tool (such as a screwdriver) can be inserted through the jack to make the clamping block close to the connecting block, and the clamping portion can be separated from the clamping groove to complete the disassembly.

[0070] Embodiment 3, the difference from Embodiment 2 is:

[0071] As Figure 6 shown, in this embodiment: a threaded cavity penetrating through the cover body 230 is formed on the cover body 230, and a pressing bolt adapted to the threaded cavity is provided in the threaded cavity.

[0072] In this embodiment: the threaded cavity includes:

[0073] The threaded hole 40;

[0074] The limiting cavity 41 is coaxially communicated with the threaded hole 40 and has a cross-sectional diameter larger than that of the threaded hole 40.

[0075] In this embodiment: the pressing bolt includes:

[0076] A bolt body 50, adapted to the threaded hole 40;

[0077] A limiting body 51, fixedly connected to one end of the bolt body 50 and adapted to the limiting cavity 41;

[0078] Wherein, a rubber protrusion 52 is fixedly connected to the end of the limiting body 51 away from the bolt body 50.

[0079] Reference Figure 6 , the advantages of this embodiment are: a pressing bolt is provided on the cover body, the pressing bolt can press the permanent magnet on the rotor, and at the same time, the contact between the rubber protrusion and the permanent magnet is used to prevent the cover body from falling off.

[0080] More specifically: during use, first use the bolt body to move the limiting body away from the axis of the cover body, and when the cover body is installed, tighten the bolt body so that the rubber protrusion on the limiting body contacts the permanent magnet on the rotor to complete the installation.

[0081] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotor heat insulation structure for an air-cooled motor, characterized in that: Comprising: An installation plate (20), detachably connected to the main shaft (120) of the rotor (12) by bolts (21); Positioning columns (22), formed on the mating surface of the installation plate (20) and the rotor (12), and a positioning cavity adapted to the positioning columns (22) is formed on the rotor (12); A heat shield (23), connected to the installation plate (20) and forming a chamber for accommodating the rotor (12) with the installation plate (20); Wherein, the installation plate (20) and the heat shield (23) are coaxially arranged.

2. The rotor heat insulation structure of an air-cooled motor according to claim 1, characterized in that: The heat shield (23) includes: A housing body (230), with an annular cross-sectional shape; A positioning edge (231), integrally formed at one end of the housing body (230); A positioning groove (232), recessed at the other end of the housing body (230) and adapted to the positioning edge (231); A clamping portion (234), formed on the positioning edge (231); A clamping groove (235), formed at the bottom of the positioning groove (232) and adapted to the clamping portion (234).

3. The rotor heat insulation structure of an air-cooled motor according to claim 2, wherein: A jack (236) communicating with the clamping groove (235) is provided on the housing body (230).

4. The rotor heat insulation structure of an air-cooled motor according to claim 2 or 3, characterized in that: The clamping portion (234) includes: A connecting block (30), connected to the positioning edge (231); A clamping block (31), hinged to the connecting block (30) by a rotating shaft (32); A spring (33), connected between the clamping block (31) and the connecting block (30).

5. The rotor heat insulation structure of an air-cooled motor according to claim 4, characterized in that: A threaded cavity penetrating through the housing body (230) is formed on the housing body (230), and a pressing bolt adapted to the threaded cavity is provided in the threaded cavity.

6. The rotor heat insulation structure of an air-cooled motor according to claim 5, characterized in that: The threaded cavity includes: A threaded hole (40); A limiting cavity (41), coaxially communicating with the threaded hole (40) and having a cross-sectional diameter larger than that of the threaded hole (40).

7. The rotor heat insulation structure of an air-cooled motor according to claim 6, characterized in that: The pressing bolt includes: A bolt body (50), adapted to the threaded hole (40); A limiting body (51), fixedly connected to one end of the bolt body (50) and adapted to the limiting cavity (41); Wherein, a rubber protrusion (52) is fixedly connected to the end of the limiting body (51) away from the bolt body (50).

Images