End cover structure of three-phase asynchronous motor

Abstract

The utility model relates to a three-phase asynchronous motor, in particular to an end cover structure of a three-phase asynchronous motor, which comprises a shell, two ends of the shell are respectively and fixedly connected with a rear end cover and a front end cover, the rear end cover is provided with an air hole, the upper inner wall and the lower inner wall of the rear end cover are respectively and fixedly connected with a fixing plate, and the two fixing plates are respectively and slidably sleeved with a positioning rod. A mounting plate is fixedly connected to one end of the positioning rod, column heads are fixedly connected to the other end of the mounting plate, a spring is fixedly connected between the mounting plate and the fixing plate, the multiple air holes are evenly distributed in the rear end cover, and the multiple column heads and the multiple air holes are correspondingly arranged. When the motor is not used, dust or foreign matters can be prevented from entering the air holes to block the air holes.

Description

TECHNICAL FIELD

[0001] The utility model relates to a three -phase asynchronous motor especially relates to a three -phase asynchronous motor's end cover structure. BACKGROUND

[0002] Three -phase asynchronous motor runs for a long time, and the continuous rotation of the rotor can cause the internal temperature of the motor to be high, and the internal temperature of the motor needs to be cooled to prevent high temperature from causing functional failure of the motor.

[0003] Through the retrieval, the patent with the application number 2020207452392 discloses a three -phase asynchronous motor, which comprises: motor stator (100), air -cooled blade (200), motor rotating shaft (300), end cover assembly (400), rotor and motor shell, the motor shell installs and fixes motor stator (100) and rotor.

[0004] The above -mentioned motor installs air -cooled blade on motor shaft and rotates to cool down along with motor shaft, and since the airflow needs to flow during cooling, the air hole for airflow circulation needs to be arranged on the end cover of the motor, when the motor is not used, external dust or foreign matters can easily enter the air hole and accumulate, even block the air hole, affect the airflow flow, and thus affect the service life of the motor. SUMMARY

[0005] The utility model discloses a kind of end cover structures of three -phase asynchronous motor, when motor is not used, external dust or foreign matters can be prevented from entering end cover air hole and causing blockage.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: provide a kind of end cover structure of three -phase asynchronous motor, including shell, the both ends of the shell are respectively fixedly connected with rear end cover and front end cover, the rear end cover is opened with air hole, the upper and lower inner walls of the rear end cover are all fixedly connected with fixed plate, two The fixed plate is all slidably sleeved with positioning rod, the positioning rod one end is fixedly connected with mounting plate, the other end of the mounting plate is fixedly connected with stud, the mounting plate and fixed plate are fixedly connected with spring between.

[0007] Optionally, the air hole is provided with a plurality of, and a plurality of air holes are evenly distributed on the rear end cover.

[0008] Optionally, the stud is provided with a plurality of, and a plurality of studs and a plurality of air holes are correspondingly arranged, and the end of a plurality of studs is conical structure.

[0009] Optionally, the both sides outer walls of the front end cover are all opened with air outlet, and the both sides outer walls of the front end cover are all fixedly provided with filter screen, the both sides outer walls of the front end cover are all fixedly connected with protective cover, and the both sides outer walls of the front end cover are all fixedly connected with protective cover.

[0010] Optionally, the spring is sleeved on the outer end of the positioning rod, and the positioning rod is fixedly connected with a limiting plate away from the mounting plate.

[0011] Optionally, a stator is fixedly arranged in the shell, a rotor is rotatably arranged in the stator, a motor shaft is rotatably sleeved in the rotor, a fan is fixedly sleeved on the outer wall of the motor shaft, and the fan is arranged on one side of the rear end cover.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] 1. The three-phase asynchronous motor is ventilated and cooled, the column head is driven to separate from the air hole by suction, air flows into the shell, the mounting plate is driven to move under the reset action of the spring when the motor stops working, the column head is pushed into the air hole again, and dust or foreign matters are prevented from entering the air hole to cause air hole blockage.

[0014] 2. The filter screen is arranged in the air outlet of the front end cover, the protective cover is arranged at the outer end of the air outlet, dust or foreign matters outside are prevented from entering the equipment, the filter screen is protected by the protective cover, the falling rocks are blocked when the utility model is used in the environment where falling rocks are prone to occur, and the falling rocks are prevented from impacting the filter screen. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 It is a front view structural schematic diagram of the utility model;

[0017] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0018] Figure 3 It is a cross-sectional structural schematic diagram of the fan working state of the utility model;

[0019] Figure 4 It is a cross-sectional structural schematic diagram of the fan stop state of the utility model.

[0020] In the figure: 1, the shell; 2, rear end cover; 21, air hole; 22, fixed plate; 23, positioning rod; 24, stud; 25, spring; 26, mounting plate; 3, front end cover; 31, air outlet; 32, filter screen; 33, protective cover; 4, stator; 5, rotor; 6, motor shaft; 7, fan. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer, the utility model will be described in further detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0024] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0025] Reference Figures 1-4 A kind of end cover structure of three-phase asynchronous motor provided by the utility model embodiment will be described now.A kind of end cover structure of three-phase asynchronous motor, including shell 1, the both ends of shell 1 are fixedly connected with rear end cover 2 and front end cover 3, air hole 21 is set on rear end cover 2, fixed plate 22 is fixedly connected on the upper and lower inner walls of rear end cover 2, positioning rod 23 is slidably sleeved on the two fixed plates 22, mounting plate 26 is fixedly connected at one end of positioning rod 23, stud 24 is fixedly connected at the other end of mounting plate 26, spring 25 is fixedly connected between mounting plate 26 and fixed plate 22.

[0026] The end cover structure of the three-phase asynchronous motor of the utility model provides compared with prior art, can after motor stop working, automatic closing air hole 21, prevent dust or foreign matter into air hole 21 cause air hole 21 block.

[0027] In another embodiment of the utility model, please refer to Figures 2 to 4 , air hole 21 is provided with a plurality of, and a plurality of air holes 21 evenly distributed and set up on rear end cover 2, stud 24 is provided with a plurality of, and a plurality of stud 24 and a plurality of air holes 21 are correspondingly set up, and the end of a plurality of stud 24 is all conical structure, and it is guided when stud 24 moves, and it is convenient to enter air hole 21.

[0028] In another embodiment of the utility model, please refer to Figures 1 to 3 , the both sides outer wall of front end cover 3 are all provided with air outlet 31, and the both sides outer wall of front end cover 3 are all fixedly connected with protective cover 33, and two protective covers 33 are respectively arranged at the outer end of two filter screens 32, the filter screen 32 is protected by the protective cover 33, when the utility model is used in the environment prone to rockfall, can play a blocking effect to rockfall, avoid rockfall impact filter screen 32 and make it breakage.

[0029] In another embodiment of the utility model, please refer to Figure 3 And Figure 4 , spring 25 movably sleeved on the outer end of positioning rod 23, spring 25 is used to assist the driving stud 24 reset when mounting plate 26 is not affected by suction, and the one end of positioning rod 23 away from mounting plate 26 is fixedly connected with limiting plate, and the limiting plate is used to limit the maximum moving distance of positioning rod 23, to avoid the tip of stud 24 to extend air hole 21.

[0030] In another embodiment of the utility model, please refer to Figure 3 And Figure 4 , the inside of stator 4 is fixedly provided with housing 1, the inside of stator 4 is rotatably provided with rotor 5, rotor 5 is rotatably sleeved with motor shaft 6, the outer wall of motor shaft 6 is fixedly sleeved with fan 7, and fan 7 is arranged on one side of rear end cover 2, when motor starts, motor shaft 6 will drive fan 7 to rotate, to drive external airflow to enter the inside of motor from rear end cover 2, to assist heat dissipation.

[0031] Working principle: when the motor works, the motor shaft 6 will drive the fan 7 to rotate, so that the airflow in the shell 1 is discharged through the air outlet 31, at this time the shell 1 is in a negative pressure state, under the action of air pressure, the stud 24 will be separated from the air hole 21, at this time the mounting plate 26 will press the spring 25 to make it in a compressed state, so that the external airflow enters the flow through the air hole 21, and the heat in the motor is taken away, the heat dissipation effect is improved; when the motor stops working, the compressed spring 25 will drive the stud 24 to reset through the mounting plate 26 and push into the air hole 21, so as to prevent external dust or foreign matter from entering the air hole 21 and causing blockage when the motor is not used, at the same time, the air outlet 31 is provided with a filter screen 32 for preventing external dust from entering the motor, and a protective cover 33 is arranged at the outer end of the filter screen 32, when the utility model is used in the environment where rockfall is easy to occur, the rockfall can be blocked, and the impact of rockfall on the filter screen 32 is avoided.

[0032] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An end cover structure for a three-phase asynchronous motor, comprising a housing (1), characterized in that: The outer shell (1) is fixedly connected to a rear end cover (2) and a front end cover (3) at both ends respectively. The rear end cover (2) is provided with an air hole (21). The upper and lower inner walls of the rear end cover (2) are fixedly connected to a fixing plate (22). The two fixing plates (22) are slidably sleeved with positioning rods (23). One end of the positioning rod (23) is fixedly connected to an mounting plate (26). The other end of the mounting plate (26) is fixedly connected to a column head (24). A spring (25) is fixedly connected between the mounting plate (26) and the fixing plate (22).

2. The end cover structure of a three-phase asynchronous motor as described in claim 1, characterized in that: The air holes (21) are provided in multiple ways, and the multiple air holes (21) are evenly distributed on the rear end cover (2).

3. The end cover structure of a three-phase asynchronous motor as described in claim 1, characterized in that: Multiple column heads (24) are provided, and multiple column heads (24) and multiple air holes (21) are provided in correspondence. The ends of multiple column heads (24) are all conical structures.

4. The end cover structure of a three-phase asynchronous motor as described in claim 1, characterized in that: Air outlets (31) are provided on both sides of the outer wall of the front cover (3), and filters (32) are fixedly installed in both air outlets (31). Protective covers (33) are fixedly connected to both sides of the outer wall of the front cover (3), and the two protective covers (33) are respectively installed at the outer ends of the two filters (32).

5. The end cover structure of a three-phase asynchronous motor as described in claim 1, characterized in that: The spring (25) is movably sleeved on the outer end of the positioning rod (23), and the end of the positioning rod (23) away from the mounting plate (26) is fixedly connected to a limiting plate.

6. The end cover structure of a three-phase asynchronous motor as described in claim 1, characterized in that: A stator (4) is fixedly installed inside the outer casing (1). A rotor (5) is rotatably installed inside the stator (4). A motor shaft (6) is rotatably sleeved inside the rotor (5). A fan (7) is fixedly sleeved on the outer wall of the motor shaft (6). The fan (7) is located on one side of the rear end cover (2).

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