Permanent magnet direct drive motor

Abstract

The utility model relates to the technical field of motors, in particular to a permanent magnet direct drive motor, which comprises a casing, a rotor, a stator, an air cooling cavity arranged on the casing, a plurality of air nozzles communicated with the air cooling cavity and an air inlet structure, the air inlet structure is provided with an air inlet area and an air outlet area, and the air inlet structure can control the air inlet area or the air outlet area to be connected with the air nozzles; when the air tap is communicated with the air inlet area, the air tap forms an air inlet end of the air cooling cavity, and air is introduced into the air cooling cavity; when the air tap communicates with the exhaust area, the air tap forms the exhaust end of the air cooling cavity and guides air in the air cooling cavity to be exhausted. According to the utility model, the air inlet structure can supply cold air to any air nozzle, so that a plurality of cooling paths are provided, and uniform cooling of the motor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a permanent magnet direct-drive motor. Background Art

[0002] Permanent magnet motor is a type of direct drive motor. Because permanent magnets are installed on its rotor, it is also called a permanent magnet motor.

[0003] At present, in order to ensure the stable operation of the motor, a cooling device is usually provided to cool the motor. The cooling method of the motor can be divided into air cooling and water cooling. No matter which method is used, the cooling medium is sent into the motor housing to cool the motor housing.

[0004] However, the cooling medium inlet and outlet on the motor housing are usually symmetrically arranged on both sides of the motor. Therefore, in the process of the cooling medium entering the motor housing and cooling, the initial cooling effect is the best. After the cooling medium flows in the motor housing, especially when the cooling medium flows to the cooling medium outlet, the cooling effect will be reduced, resulting in uneven cooling effect on the overall motor.

[0005] In summary, improvements need to be made. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a permanent magnet direct drive motor, aiming to solve the problems arising from the above-mentioned background technology.

[0007] The technical solution of the utility model is implemented as follows: a permanent magnet direct drive motor, comprising:

[0008] chassis;

[0009] a rotor having permanent magnets and a main shaft;

[0010] stator;

[0011] The rotor is rotatably arranged in the casing through the main shaft, and the stator is fixedly arranged in the casing and arranged coaxially with the rotor. The characteristic is that at least two air cooling cavities coaxially arranged with the stator are formed in the casing, and at least two air nozzles connected to each air cooling cavity are arranged on the casing;

[0012] It also includes an air intake structure installed on the air nozzle, the air intake structure has an air intake area and an exhaust area, and the air intake structure can control the air intake area or the exhaust area to be connected to the air nozzle;

[0013] When the air nozzle is connected to the air inlet area, the air nozzle forms the air inlet end of the air cooling cavity and introduces gas into the air cooling cavity;

[0014] When the air nozzle is connected to the exhaust area, the air nozzle forms the exhaust end of the air cooling cavity and guides the gas in the air cooling cavity to be discharged.

[0015] Preferably, the air intake structure comprises:

[0016] A connector, mounted on the gas nozzles, and having an exhaust cavity connected to each gas nozzle;

[0017] The moving body is arranged in the exhaust chamber at intervals and can be controlled by a driver to move back and forth in the exhaust chamber;

[0018] A linkage shaft, fixedly connected between adjacent moving bodies;

[0019] An exhaust port is provided on the connecting body and can be communicated with the exhaust cavity;

[0020] An air inlet pipe, one end of which is connected to the moving body and the other end of which is provided with an air inlet nozzle mounted on the connecting body;

[0021] The moving body and the linkage shaft are integrally formed, and an air intake cavity connected to the air intake pipe is formed, and an air intake port that can be connected to the air nozzle is provided on the moving body.

[0022] Preferably, the air inlet cavity comprises a first cavity formed in the linkage shaft and a second cavity formed in the moving body, and a filter screen coaxially arranged with the moving body is arranged in the second cavity.

[0023] Preferably, a heat insulation structure is provided between adjacent moving bodies.

[0024] Preferably, the thermal insulation structure comprises:

[0025] A heat insulation block, fixed on the moving body;

[0026] A heat insulator, with two ends respectively fixedly connected to the heat insulation block;

[0027] Wherein, the heat insulation body is hollow.

[0028] The utility model has at least the following beneficial effects:

[0029] 1. The utility model is provided with an air intake structure, which can control the airflow to enter from different air nozzles, thereby changing the flow path and flow direction of the cold air in the casing, thereby ensuring uniform cooling of the motor.

[0030] 2. Secondly, in order to prevent impurities from entering the casing, the utility model provides a filter in the air intake cavity, and the filter can prevent impurities from entering the casing.

[0031] In addition, other advantages of the present invention will be demonstrated in the embodiments of the present invention, thereby making the beneficial effects of the present invention more significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 This is a structural schematic diagram of a permanent magnet direct drive motor in specific embodiment 1 of the utility model;

[0034] Figure 2 This is a cross-sectional view of a permanent magnet direct drive motor according to a specific embodiment 1 of the utility model;

[0035] Figure 3 for Figure 2 A magnified view of part A in FIG.

[0036] Figure 4 It is a schematic structural diagram of specific embodiment 2 of the utility model. DETAILED DESCRIPTION

[0037] 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.

[0038] Example 1

[0039] like Figure 1-3 As shown, the utility model discloses a permanent magnet direct drive motor, comprising:

[0040] Housing 10;

[0041] A rotor 11 having a permanent magnet 110 and a main shaft 111;

[0042] Stator 12;

[0043] The rotor 11 is rotatably disposed in the housing 10 via a main shaft 111 , and the stator 12 is fixedly disposed in the housing 10 and is coaxially disposed with the rotor 11 .

[0044] In this embodiment, at least two air cooling chambers 20 coaxially arranged with the stator 12 are formed in the housing 10, and at least two air nozzles 21 communicating with each air cooling chamber 20 are provided on the housing 10;

[0045] In this embodiment, an air intake structure 3 is further included which is mounted on the air nozzle 21. The air intake structure 3 has an air intake area and an air exhaust area. The air intake structure 3 can control the air intake area or the air exhaust area to be connected to the air nozzle 21.

[0046] When the air nozzle 21 is connected to the air inlet area, the air nozzle forms the air inlet end of the air cooling chamber 20 and introduces gas into the air cooling chamber 20;

[0047] When the air nozzle 21 is connected to the exhaust area, the air nozzle 21 forms an exhaust end of the air cooling chamber and guides the gas in the air cooling chamber 20 to be discharged.

[0048] In this embodiment: the air intake structure 3 includes:

[0049] The connecting body 30 is mounted on the air nozzles 21 and has an exhaust cavity 31 (exhaust area in this embodiment) communicating with each air nozzle 21;

[0050] The moving body 32 is disposed in the exhaust chamber 31 at intervals and can be controlled by a driver 33 (electric push rod) to move back and forth in the exhaust chamber 31;

[0051] A linkage shaft 34, fixedly connected between adjacent moving bodies 32;

[0052] The exhaust port 35 is provided on the connecting body 30 and can be communicated with the exhaust cavity 31;

[0053] An air intake pipe 36, one end of which is connected to the moving body 32, and the other end of which is provided with an air intake nozzle 36a mounted on the connecting body 30;

[0054] The moving body 32 and the linkage shaft 34 are integrally formed, and an air intake cavity (the air intake area of ​​this embodiment) connected to the air intake pipe 36 is formed, and an air intake port 37 that can be connected to the air nozzle 21 is provided on the moving body 32.

[0055] In this embodiment, the air inlet cavity includes a first cavity 381 formed in the linkage shaft 34 and a second cavity 382 formed in the moving body 32 . A filter screen 383 coaxially arranged with the moving body 32 is disposed in the second cavity 382 .

[0056] refer to Figure 1-3 , the cooling principle of this embodiment is:

[0057] This embodiment has four air nozzles and two air cooling chambers. The two air nozzles and one air cooling chamber form a group, and the two air nozzles are connected to the air cooling chamber. Through the control of the air intake structure on both sides of the casing, the air nozzles on the same side of the casing can respectively send air into one of the air cooling chambers, and the other air nozzle can discharge the gas in the other air cooling chamber.

[0058] In more detail: Reference Figure 2-3 , taking the air intake structure on one side of the casing as an example, when the air pump supplies air to the air intake nozzle, the gas entering from the air intake nozzle can flow in the air intake cavity. When the electric push rod controls the movement of the moving body, the air intake port on one of the moving bodies can be connected to one of the air nozzles, while the air intake port on the other moving body is misaligned with the other air nozzle, and the air nozzle is connected to the exhaust cavity. The two air nozzles on one side of the casing, one intakes air into the air cooling cavity, and the other exhausts the gas in the air cooling cavity. Similarly, the air intake structure on the other side of the casing is the same; therefore, the cold air flow of one of the air cooling cavities can enter from the air nozzle at the bottom of the casing and be discharged from the air nozzle at the top of the casing to complete the cooling of the casing, while the cold air flow of the other air cooling cavity can enter from the air nozzle at the top of the casing and be discharged from the air nozzle at the bottom of the casing to complete the cooling of the casing. Under the control of the electric support rod, the air intake paths of the two air cooling cavities will be switched and changed, so that the motor can be cooled evenly.

[0059] It should be noted that the gas discharged from the air cooling chamber through the air nozzle will enter the exhaust cavity of the connector and will eventually be discharged through the exhaust port.

[0060] Embodiment 2 is different from Embodiment 1 in that

[0061] like Figure 4 As shown, in this embodiment: a heat insulation structure is provided between adjacent moving bodies.

[0062] In this embodiment: the thermal insulation structure includes:

[0063] The heat insulation block 50 is fixed on the moving body 32;

[0064] The heat insulator 51 has two ends fixedly connected to the heat insulation block 50;

[0065] The heat insulator 51 is hollow and coaxial with the linkage shaft 34 , that is, the linkage shaft 34 is disposed in the heat insulator 51 .

[0066] refer to Figure 4 The heat insulation structure provided in this embodiment prevents the hot air discharged from the exhaust chamber from affecting the cold air flowing inside the linkage shaft, that is, ensures that the cooling entering the casing is not affected by the hot air discharged from the exhaust chamber, thereby ensuring the cooling effect on the motor.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A permanent magnet direct drive motor, comprising: Housing (10); A rotor (11) having a permanent magnet (110) and a main shaft (111); stator (12); The rotor (11) is rotatably arranged in the housing (10) via a main shaft (111), and the stator (12) is fixedly arranged in the housing (10) and is coaxially arranged with the rotor (11). The characteristic is that at least two air cooling chambers (20) coaxially arranged with the stator (12) are formed in the housing (10), and at least two air nozzles (21) in communication with the air cooling chambers (20) are arranged on the housing (10); It also includes an air intake structure (3) mounted on the air nozzle (21), the air intake structure (3) having an air intake area and an air exhaust area, and the air intake structure (3) can control the air intake area or the air exhaust area to be connected to the air nozzle (21); When the air nozzle (21) is connected to the air inlet area, the air nozzle (21) forms the air inlet end of the air cooling chamber (20) and introduces gas into the air cooling chamber (20); When the air nozzle (21) is connected to the exhaust area, the air nozzle (21) forms the exhaust end of the air cooling chamber (20) and guides the gas in the air cooling chamber (20) to be discharged.

2. A permanent magnet direct drive motor according to claim 1, characterized in that: The air intake structure (3) comprises: A connecting body (30) is mounted on the air nozzles (21) and has an exhaust cavity (31) connected to each air nozzle (21); A moving body (32) is disposed in the exhaust chamber (31) at intervals and can be controlled by a driver (33) to move back and forth in the exhaust chamber (31); A linkage shaft (34) fixedly connected between adjacent moving bodies (32); An exhaust port (35) is provided on the connecting body (30) and is capable of communicating with the exhaust cavity (31); An air intake pipe (36), one end of which is connected to the moving body (32) and the other end of which is provided with an air intake nozzle (36a) mounted on the connecting body (30); The movable body (32) and the linkage shaft (34) are integrally formed and form an air intake cavity connected to an air intake pipe (36). An air intake port (37) capable of connecting to an air nozzle (21) is provided on the movable body (32).

3. A permanent magnet direct drive motor according to claim 2, characterized in that: The air intake chamber comprises a first chamber (381) formed in the linkage shaft (34) and a second chamber (382) formed in the moving body (32); a filter screen (383) coaxially arranged with the moving body (32) is provided in the second chamber (382).

4. A permanent magnet direct drive motor according to claim 2 or 3, characterized in that: A heat insulation structure is provided between adjacent moving bodies.

5. A permanent magnet direct drive motor according to claim 4, characterized in that: The thermal insulation structure comprises: A heat insulation block (50) fixed on the moving body (32); The heat insulator (51) has two ends fixedly connected to the heat insulation block (50) respectively; Wherein, the heat insulator (51) is hollow.

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