Protective three-phase asynchronous motor

Abstract

The utility model discloses a protection type three -phase asynchronous motor, including motor shell and the motor axle of installing in motor shell, the one side of motor axle is provided with heat dissipation mechanism, is provided with the protection mechanism in motor shell, the heat dissipation mechanism includes transmission shaft, transmission shaft is connected with motor axle through connecting piece, the surface fixed connection of transmission shaft has a plurality of evenly distributed fan blade, still include the side plate, the side plate is connected with motor shell through threaded bolt cooperation nut, the one side outer wall of side plate has established a plurality of evenly distributed air hole, this protection type three -phase asynchronous motor, through transmission shaft will along with the rotation of motor axle and rotate, the rotation of transmission shaft can make the rotation of fan blade, the rotation of fan blade can be the air of side plate outside and draw to the motor shell in the air hole, can improve the air exchange of motor inside and outside greatly, therefore, can realize the effect of improving the air flow rate, realizes the effect of improving the heat dissipation performance.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a protective three-phase asynchronous motor. Background Technology

[0002] The main function of an electric motor is to generate driving torque. As a power source for electrical appliances or various machines, electric motors often work outdoors and in harsh environments, so they need to be protected. There are many types of electric motors, and different types of motors are used according to different working requirements. Three-phase asynchronous motors are a common type. They are a type of motor that is powered by a 380V three-phase AC power supply. After being powered on and started, the rotor windings induce electromotive force and current due to the relative motion between them and the magnetic field.

[0003] Currently, Chinese patent CN218472897U discloses a protective structure for an electric motor, including a housing. The housing contains a motor body, and multiple heat dissipation holes are evenly distributed on one side of the housing. The output end of the motor body passes through the housing and extends to the outside. Two support plates are mounted on the top of the housing, and a baffle is mounted on the top of both support plates. Multiple through holes are formed inside the baffle, and fixing rods are installed within each of these through holes. A protective mechanism is provided on one side of the housing. By incorporating this protective mechanism, the motor body is protected, preventing short circuits caused by rainwater entering the motor through the output end during use. This significantly improves the safety of the motor during operation.

[0004] However, when using existing three-phase motors, several heat dissipation vents are often opened on the motor casing or heat dissipation fins are added. The heat exchange between the inside and outside of the motor is achieved by relying on natural airflow. However, the natural airflow rate is low, resulting in poor heat dissipation.

[0005] Therefore, this utility model provides a protective three-phase asynchronous motor. Utility Model Content

[0006] This invention provides a protective three-phase asynchronous motor, which aims to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a protective three-phase asynchronous motor, including a motor housing and a motor shaft installed inside the motor housing, a heat dissipation mechanism is provided on one side of the motor shaft, and a protective mechanism is provided inside the motor housing;

[0008] The heat dissipation mechanism includes a drive shaft, which is connected to the motor shaft via a connector, and a number of evenly distributed fan blades are fixedly connected to the surface of the drive shaft.

[0009] It also includes a side plate, which is connected to the motor housing by threaded bolts and nuts. The outer wall of one side of the side plate has several evenly distributed air holes, which allow air to flow inside and outside the motor.

[0010] Preferably, the connector includes a connecting block, which is fixed to the motor shaft. A connecting cylinder is fixedly connected to one side of the transmission shaft, and the inner wall of the connecting cylinder is in sliding fit with and adapted to the connecting block.

[0011] Preferably, the inner wall of the connecting cylinder has a rectangular structure, and the connecting block has a cubic structure.

[0012] Preferably, the protective mechanism includes a filter screen, which is located inside the side plate. A movable opening is provided on one side of the filter screen, and the inner wall of the movable opening is in sliding fit with the drive shaft.

[0013] Preferably, the top inner wall and bottom inner wall of the side plate are provided with T-shaped positioning grooves, and the inner wall of the positioning groove is slidably connected with a T-shaped positioning block, which is fixed to the filter screen plate.

[0014] Preferably, a positioning spring is fixedly installed on one side of the positioning block, and the positioning spring is fixed to the inner wall of the positioning groove.

[0015] Preferably, an adjusting ring is fixedly installed on one side of the filter screen, the adjusting ring surrounds the drive shaft, one side of the adjusting ring is inclined, and an adjusting rod is fixedly installed on one side of the drive shaft.

[0016] Preferably, an adjustment groove is provided on one side of the adjustment rod, and an adjustment ball is rotatably connected to the inner wall of the adjustment groove, with the adjustment ball and the adjustment ring forming a rolling engagement. Beneficial effects

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) The protective three-phase asynchronous motor rotates with the rotation of the motor shaft through the transmission shaft. The rotation of the transmission shaft can cause the fan blades to rotate. The rotation of the fan blades can draw the air outside the side plate into the motor housing through the air hole, which can greatly improve the air exchange inside and outside the motor. Therefore, it can improve the air flow rate and achieve the effect of improving heat dissipation performance.

[0019] (2) The protective three-phase asynchronous motor can be connected to the connecting block by connecting tube and the side plate can be installed. When replacing or cleaning the fan blades or filter screen, the side plate can be disassembled without disassembling other parts, which is more convenient. Moreover, even if the motor is not powered off, the fan blades are inside the filter screen, which can prevent the fan blades from causing injury to the staff. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a front sectional view of the structure of this utility model;

[0022] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0023] Figure 4 This is a schematic diagram of the partial explosion structure of this utility model;

[0024] Figure 5 This is a partial structural diagram of the adjusting rod of this utility model.

[0025] In the diagram: 1. Motor housing; 2. Motor shaft; 3. Drive shaft; 4. Fan blade; 5. Side plate; 6. Air hole; 7. Connecting block; 8. Connecting cylinder; 9. Filter screen; 10. Movable port; 11. Positioning groove; 12. Positioning block; 13. Positioning spring; 14. Adjusting ring; 15. Adjusting rod; 16. Adjusting groove; 17. Adjusting ball. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 A protective three-phase asynchronous motor includes a motor housing 1 and a motor shaft 2 installed inside the motor housing 1. A heat dissipation mechanism is provided on one side of the motor shaft 2, and a protective mechanism is provided inside the motor housing 1.

[0028] The heat dissipation mechanism includes a drive shaft 3, which is connected to the motor shaft 2 via a connector. Several evenly distributed fan blades 4 are fixedly connected to the surface of the drive shaft 3.

[0029] It also includes a side plate 5, which is connected to the motor housing 1 by threaded bolts and nuts. A number of evenly distributed air holes 6 are provided on one outer wall of the side plate 5, which allow air to flow inside and outside the motor.

[0030] Specifically, the transmission shaft 3 rotates along with the motor shaft 2. The rotation of the transmission shaft 3 causes the fan blades 4 to rotate. The rotation of the fan blades 4 draws air from outside the side plate 5 into the motor housing 1 through the air holes 6, which greatly improves the air exchange between the inside and outside of the motor. Therefore, it can improve the air flow rate and achieve the effect of improving heat dissipation performance.

[0031] As a further improvement of this utility model, the connecting component includes a connecting block 7, which is fixed to the motor shaft 2. A connecting cylinder 8 is fixedly connected to one side of the transmission shaft 3. The inner wall of the connecting cylinder 8 and the connecting block 7 form a sliding fit and are compatible. The inner wall of the connecting cylinder 8 has a rectangular structure, and the connecting block 7 has a cubic structure.

[0032] Specifically, the connecting block 7, in conjunction with the connecting cylinder 8, transmits power to the drive shaft 3, allowing the drive shaft 3 to rotate along with the motor shaft 2. This also facilitates installation and provides protection. The rectangular structure design allows the connecting cylinder 8 to move synchronously with the movement of the connecting block 7.

[0033] As a further improvement of this utility model, the protective mechanism includes a filter screen plate 9, which is located inside the side plate 5. A movable opening 10 is provided on one side of the filter screen plate 9, and the inner wall of the movable opening 10 forms a sliding fit with the drive shaft 3.

[0034] Specifically, the filter screen 9 and the movable port 10 prevent motion interference with the drive shaft 3, ensuring the normal operation of the equipment.

[0035] As a further improvement of this utility model, the top inner wall and bottom inner wall of the side plate 5 are provided with a T-shaped positioning groove 11. The inner wall of the positioning groove 11 is slidably connected with a T-shaped positioning block 12. The positioning block 12 is fixed to the filter screen plate 9. A positioning spring 13 is fixedly installed on one side of the positioning block 12. The positioning spring 13 is fixed to the inner wall of the positioning groove 11.

[0036] Specifically, the positioning block 12 slides in the inner wall of the positioning groove 11, at which time the positioning spring 13 is stretched. The tension of the positioning spring 13 can make the positioning block 12 slide in the opposite direction in the positioning groove 11. With the rotation of the transmission shaft 3, the filter screen 9 can reciprocate. The T-shaped structure design can prevent the positioning block 12 from separating from the inner wall of the positioning groove 11, and can make the movement of the filter screen 9 stable.

[0037] As a further improvement of this utility model, an adjusting ring 14 is fixedly installed on one side of the filter screen plate 9. The adjusting ring 14 surrounds the transmission shaft 3. One side of the adjusting ring 14 is inclined. An adjusting rod 15 is fixedly installed on one side of the transmission shaft 3. An adjusting groove 16 is opened on one side of the adjusting rod 15. An adjusting ball 17 is rotatably connected to the inner wall of the adjusting groove 16. The adjusting ball 17 and the adjusting ring 14 form a rolling fit.

[0038] Specifically, by rotating the adjusting rod 15 in conjunction with rotating the adjusting ball 17 within the adjusting groove 16, the adjusting rod 15 can apply force to the adjusting ring 14. When the adjusting rod 15 presses against the adjusting ring 14, the positioning block 12 slides within the inner wall of the positioning groove 11. At this time, the positioning spring 13 is stretched. When the adjusting rod 15 approaches the thinner end of the adjusting ring 14, the tension of the positioning spring 13 can cause the positioning block 12 to slide in the opposite direction within the inner wall of the positioning groove 11. Accompanied by the rotation of the drive shaft 3, the filter screen 9 can reciprocate, which helps to clean the dust on the surface of the filter screen 9.

[0039] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0040] The working principle of this utility model is as follows: When in use, after the motor is started, the motor shaft 2 will rotate. The rotation of the motor shaft 2 can be transmitted to the transmission shaft 3 through the connecting block 7 and the connecting cylinder 8. At this time, the transmission shaft 3 will rotate with the rotation of the motor shaft 2. The rotation of the transmission shaft 3 can make the fan blade 4 rotate. The rotation of the fan blade 4 can draw the air outside the side plate 5 into the motor housing 1 through the air hole 6, which can greatly improve the air exchange inside and outside the motor. Therefore, it can improve the air flow rate and achieve the effect of improving heat dissipation performance.

[0041] As the drive shaft 3 rotates, the adjusting rod 15 rotates. The rotation of the adjusting rod 15, in conjunction with the rotation of the adjusting ball 17 within the adjusting groove 16, allows the adjusting rod 15 to apply force to the adjusting ring 14. When the adjusting rod 15 presses against the adjusting ring 14, the positioning block 12 slides within the inner wall of the positioning groove 11. At this time, the positioning spring 13 is stretched. When the adjusting rod 15 approaches the thinner end of the adjusting ring 14, the tension of the positioning spring 13 causes the positioning block 12 to slide in the opposite direction within the positioning groove 11. With the rotation of the drive shaft 3, the filter screen 9 can reciprocate, which helps to clean the dust on the surface of the filter screen 9.

[0042] When installing the side plate 5, simply snap the connecting cylinder 8 into the connecting block 7 and install the side plate 5. When replacing or cleaning the fan blade 4 or the filter screen 9, the side plate 5 can be disassembled without disassembling other parts, which is more convenient. Moreover, even if the motor is not powered off, the fan blade 4 is inside the filter screen 9, which can prevent the fan blade 4 from causing injury to the staff.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective three-phase asynchronous motor, comprising a motor housing (1) and a motor shaft (2) mounted within the motor housing (1), characterized in that: A heat dissipation mechanism is provided on one side of the motor shaft (2), and a protective mechanism is provided inside the motor housing (1); The heat dissipation mechanism includes a drive shaft (3), which is connected to the motor shaft (2) via a connector. Several evenly distributed fan blades (4) are fixedly connected to the surface of the drive shaft (3). It also includes a side plate (5), which is connected to the motor housing (1) by threaded bolts and nuts. A number of evenly distributed air holes (6) are provided on one side of the outer wall of the side plate (5), through which air can flow inside and outside the motor.

2. The protective three-phase asynchronous motor according to claim 1, characterized in that: The connector includes a connecting block (7), which is fixed to the motor shaft (2). A connecting cylinder (8) is fixedly connected to one side of the transmission shaft (3). The inner wall of the connecting cylinder (8) and the connecting block (7) form a sliding fit and are compatible.

3. The protective three-phase asynchronous motor according to claim 2, characterized in that: The inner wall of the connecting cylinder (8) is rectangular, and the connecting block (7) is cubic.

4. The protective three-phase asynchronous motor according to claim 1, characterized in that: The protective mechanism includes a filter screen (9), which is located inside the side plate (5). A movable opening (10) is provided on one side of the filter screen (9), and the inner wall of the movable opening (10) is in sliding fit with the drive shaft (3).

5. The protective three-phase asynchronous motor according to claim 4, characterized in that: The inner top and bottom walls of the side plate (5) are provided with T-shaped positioning grooves (11), and the inner walls of the positioning grooves (11) are slidably connected with T-shaped positioning blocks (12), which are fixed to the filter screen plate (9).

6. The protective three-phase asynchronous motor according to claim 5, characterized in that: A positioning spring (13) is fixedly installed on one side of the positioning block (12), and the positioning spring (13) is fixed to the inner wall of the positioning groove (11).

7. The protective three-phase asynchronous motor according to claim 6, characterized in that: An adjusting ring (14) is fixedly installed on one side of the filter screen (9). The adjusting ring (14) surrounds the drive shaft (3). One side of the adjusting ring (14) is inclined. An adjusting rod (15) is fixedly installed on one side of the drive shaft (3).

8. The protective three-phase asynchronous motor according to claim 7, characterized in that: An adjustment groove (16) is provided on one side of the adjustment rod (15), and an adjustment ball (17) is rotatably connected to the inner wall of the adjustment groove (16). The adjustment ball (17) and the adjustment ring (14) form a rolling fit.

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