Three-phase asynchronous motor with waterproof structure

Abstract

The utility model relates to the technical field of three-phase asynchronous motors, in particular to a three-phase asynchronous motor with a waterproof structure, which comprises a box body, the left side wall of the box body is provided with a through hole, the front surface of the box body is fixedly connected with a second bearing seat, and the position of the second bearing seat corresponds to the position of the through hole. The upper surface and the lower surface of the box body are provided with installation openings, waterproof components are movably installed in the installation openings and comprise partition plates, the partition plates are installed on the outer surface of the box body, and the inner surfaces of the partition plates are fixedly connected with installation bases. The inner wall of the mounting base is fixedly connected with a water absorption sponge, and a semicircular groove is formed in the end face of the water absorption sponge. According to the utility model, two protections can be provided, external water prevention and internal water prevention can be carried out simultaneously, the service life of the motor is prolonged, the water absorption sponge can be replaced conveniently, and the workload of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the field of three-phase asynchronous motors, in particular to a three-phase asynchronous motor with a waterproof structure. Background Art

[0002] The three-phase asynchronous motor is a type of electric motor that is powered by a 380V three-phase AC power supply (with a phase difference of 120 degrees). Since the rotor and stator rotating magnetic fields of the three-phase asynchronous motor rotate in the same direction and at different speeds, there is a slip rate, so it is called a three-phase asynchronous motor. It is widely used to drive various metal cutting machine tools, cranes, forging machines, conveyor belts, casting machinery, low-power fans and water pumps.

[0003] When applying for this utility model, the applicant found through search that a Chinese patent disclosed "a highly waterproof three-phase asynchronous motor" with application number "202222712310.9". This patent mainly waterproofs the motor by putting a layer of outer shell on the outside. It does not take into account that the waterproof effect of the waterproof component may be reduced after long-term use. The liquid penetrates into the outer shell through the joint between the rotating shaft and the outer shell, and then enters the motor through the joint between the rotating shaft and the motor shell, affecting the operation of the motor. Summary of the invention

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a three-phase asynchronous motor with a waterproof structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a three-phase asynchronous motor with a waterproof structure, comprising a box body, a through hole is opened on the left side wall of the box body, a second bearing seat is fixedly connected to the front side of the box body, the position of the second bearing seat corresponds to the position of the through hole, the inner ring diameter of the second bearing seat is larger than the diameter of the through hole, a sealed bearing is installed inside the second bearing seat, mounting openings are opened on the upper and lower surfaces of the box body, a waterproof component is movably installed inside the mounting opening, the waterproof component comprises a partition, the partition is installed on the outer surface of the box body, the inner surface of the partition is fixedly connected to a mounting seat, the inner wall of the mounting seat is fixedly connected to a water-absorbing sponge, and the end surface of the water-absorbing sponge is opened with a semicircular groove.

[0006] As a further description of the above technical solution:

[0007] The upper and lower surfaces of the box body are fixedly connected to limit bearings, the limit bearings are located on one side of the partition, a movable shaft is movably installed inside the limit bearing, a baffle is fixedly connected to the surface of the movable shaft, the lower surface of the baffle is in contact with the outer surface of the partition, and a handle is fixedly connected to the outer surface of the partition.

[0008] As a further description of the above technical solution:

[0009] The interior of the box body is fixedly connected with four fixing seats, two of which are installed on the inner wall of the upper shell of the box body, and two of which are installed on the inner wall of the lower shell of the box body. The right inner wall of the lower shell of the box body is fixedly connected with a first bearing seat, and a fixed bearing is installed inside the first bearing seat.

[0010] As a further description of the above technical solution:

[0011] An electric motor is installed inside the adjacent fixed seat, and the motor includes a shell, a rotating shaft, a stator, and a rotor. The rotating shaft is installed inside the shell, the stator is installed on the inner wall of the shell, and the rotor is installed on the outer wall of the rotating shaft. The left end of the rotating shaft extends to the outside of the box through a through hole, and the right end of the rotating shaft is installed inside the fixed bearing. A fan is fixedly connected to the right end surface of the rotating shaft, and the fan is located between the first bearing seat and the right end surface of the shell.

[0012] As a further description of the above technical solution:

[0013] The left side wall of the box body is provided with a plurality of heat dissipation openings, and a protective plate is fixedly connected to the left side wall of the box body, and the position of the protective plate corresponds to the heat dissipation openings.

[0014] As a further description of the above technical solution:

[0015] The box body comprises an upper shell and a lower shell, wherein the upper shell is installed above the lower shell, and the upper shell and the lower shell are fixedly connected by locking bolts.

[0016] As a further description of the above technical solution:

[0017] The bottom of the box body is fixedly provided with supporting feet, and the number of the supporting feet is four.

[0018] The utility model has the following beneficial effects:

[0019] 1. Compared with the prior art, the three-phase asynchronous motor with waterproof structure is provided with a box, a motor, a fixed seat, a second bearing seat, a sealed bearing, and a waterproof component. When the motor is placed on the fixed seat of the lower shell of the box, the upper shell of the box is covered, and then the sealed bearing is installed inside the second bearing seat and the second bearing seat is locked with a locking bolt. The sealed bearing will be locked inside the second bearing seat. At the same time, the upper shell of the box is fixedly connected with the rear side of the lower shell by the locking bolt. The upper and lower shells of the box are completely closed to isolate the motor from the outside, providing a first waterproof measure. When a small amount of tiny liquid enters the box through the connection between the sealed bearing and the rotating shaft, the absorbent sponge in the box will absorb the liquid to prevent the liquid from entering the inside of the motor through the connection between the rotating shaft and the shell, which affects the operation of the motor, providing a second waterproof measure. Compared with conventional waterproof motors that are waterproofed only by setting a waterproof box outside the motor, without considering that the waterproof effect of the waterproof component may be reduced after long-term use, resulting in insufficient subsequent waterproofing, the utility model can provide two protections, and simultaneously perform external waterproofing and internal waterproofing, with obvious waterproofing effect, and prolonging the service life of the motor.

[0020] 2. Compared with the prior art, this three-phase asynchronous motor with a waterproof structure is provided with a partition, a baffle, a handle and a mounting port. If the absorbent sponge needs to be replaced, it is only necessary to rotate the baffle and pull the handle to pull out the absorbent sponge. After replacing the sponge, it is reinserted into the mounting port, and the baffle is turned back to fix the partition. The absorbent sponge can be replaced without re-disassembling the box body, thereby reducing the workload of the staff.

[0021] 3. Compared with the prior art, the three-phase asynchronous motor with a waterproof structure is provided with a box body, a motor, a fan, a heat dissipation port and a protective plate. When the motor is working, the fan is driven to rotate, and an airflow is generated to blow the heat generated by the motor to the front end of the motor, dry the sponge that absorbs moisture, and continue to blow the water vapor and heat to the heat dissipation port for discharge, thereby providing heat dissipation for the motor and improving the water absorption capacity of the sponge. At the same time, the protective plate can prevent rainwater and other liquids from entering the box body through the heat dissipation port. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the three-phase asynchronous motor of the utility model;

[0023] Figure 2 This is a cross-sectional view of the internal structure of the utility model from the first perspective;

[0024] Figure 3 This is a cross-sectional view of the internal structure of the utility model from a second viewing angle;

[0025] Figure 4 This is an enlarged view of the structure at point A in the figure;

[0026] Figure 5 This is a cross-sectional view of the internal structure of the utility model from the third viewing angle.

[0027] Legend:

[0028] 1. Box body; 2. Installation port; 3. Waterproof component; 301. Partition; 302. Handle; 303. Mounting seat; 304. Water-absorbing sponge; 305. Limit bearing; 306. Movable shaft; 307. Baffle; 4. Through hole; 5. Fixed seat; 6. First bearing seat; 7. Fixed bearing; 8. Motor; 801. Housing; 802. Rotating shaft; 803. Stator; 804. Rotor; 9. Fan; 10. Protective plate; 11. Second bearing seat; 12. Sealed bearing; 13. Support foot; 14. Heat dissipation port. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] Reference Figure 1-5 The utility model provides a three-phase asynchronous motor with a waterproof structure: it includes a box body 1, the box body 1 includes an upper shell and a lower shell, the upper shell is installed above the lower shell, the upper shell and the lower shell are fixedly connected by locking bolts, the inside of the box body 1 is fixedly connected with a fixing seat 5, the number of the fixing seats 5 is four, two fixing seats 5 are installed on the inner wall of the upper shell of the box body 1, and two fixing seats 5 are installed on the inner wall of the lower shell of the box body 1, and the motor 8 is installed inside the adjacent fixing seats 5. The left side wall of the box body 1 is opened with a through hole 4, and the front of the box body 1 is fixedly connected with a second bearing seat 11, the second bearing seat 11 is connected and assembled by locking bolts, and a sealed bearing 12 is installed inside the second bearing seat 11.

[0031] When in use, place the motor 8 on the fixing seat 5 of the lower shell of the box body 1, cover the upper shell of the box body 1, then install the sealed bearing 12 inside the second bearing seat 11 and lock the second bearing seat 11 with the locking bolts. The sealed bearing 12 will be locked inside the second bearing seat 11. At the same time, the upper shell of the box body 1 is fixedly connected to the rear side of the lower shell by the locking bolts. The upper and lower shells of the box body 1 are completely closed, so that the motor 8 is isolated from the outside world, providing the first waterproof measure.

[0032] Among them, Figure 3As shown, the motor 8 includes a housing 801, a rotating shaft 802, a stator 803, and a rotor 804. The rotating shaft 802 is installed inside the housing 801, the stator 803 is installed on the inner wall of the housing 801, and the rotor 804 is installed on the outer wall of the rotating shaft 802. The left end of the rotating shaft 802 extends to the outside of the box body 1 through the through hole 4. The right side wall of the box body 1 is fixedly connected with a first bearing seat 6, and a fixed bearing 7 is installed inside the first bearing seat 6. The right end of the rotating shaft 802 is installed inside the fixed bearing 7. The motor 8 can be installed in a fixed position in the box body 1 through the fixed seat 5 and the fixed bearing 7.

[0033] The position of the second bearing seat 11 corresponds to the position of the through hole 4 , the inner ring diameter of the second bearing seat 11 is larger than the diameter of the through hole 4 , and the diameter of the through hole 4 is larger than the diameter of the rotating shaft 802 .

[0034] In one of the embodiments, as shown in 2, the upper and lower surfaces of the box body 1 are provided with mounting openings 2, and a waterproof component 3 is movably installed inside the mounting opening 2. The waterproof component 3 includes a partition 301, and the partition 301 is installed on the outer surface of the box body 1. The area of ​​the partition 301 is larger than the area of ​​the mounting opening 2, and can play a sealing role. The inner surface of the partition 301 is fixedly connected with a mounting seat 303. The size of the mounting seat 303 is consistent with the size of the mounting opening 2, and can freely enter and exit the mounting opening 2. The inner wall of the mounting seat 303 is fixedly connected with a water-absorbing sponge 304, and the end face of the water-absorbing sponge 304 is provided with a semicircular groove, which is convenient for installing the rotating shaft 802 of the motor 8.

[0035] When a small amount of tiny liquid enters the interior of the housing 1 through the connection between the sealed bearing 12 and the rotating shaft 802, the water-absorbing sponge 304 in the housing 1 will absorb the liquid, preventing the liquid from entering the interior of the motor 8 through the connection between the rotating shaft 802 and the housing 801, thereby affecting the operation of the motor 8, and thus providing a second waterproof measure. The utility model can provide two layers of protection, and simultaneously perform external and internal waterproofing, with an obvious waterproofing effect, thereby increasing the service life of the motor 8.

[0036] Furthermore, if Figure 2 As shown, a handle 302 is fixedly connected to the outer surface of the partition 301, and a limit bearing 305 is fixedly connected to the upper and lower surfaces of the box body 1. The limit bearing 305 is located on one side of the partition 301, and a movable shaft 306 is movably installed inside the limit bearing 305. A baffle 307 is fixedly connected to the surface of the movable shaft 306, and the lower surface of the baffle 307 is in contact with the outer surface of the partition 301.

[0037] If the absorbent sponge 304 needs to be replaced, the baffle 307 only needs to be rotated to pull the handle 302 to extract the sponge, and after the sponge is replaced, it is reinserted into the installation port 2, and the baffle 307 is turned back to fix the partition 301.

[0038] In one embodiment, if Figure 3 As shown, the surface of the rotating shaft 802 is fixedly connected with a fan 9, and the fan 9 is located between the first bearing seat 6 and the right end surface of the housing 801. When the motor 8 is working, the rotating shaft 802 will drive the fan 9 to rotate to generate airflow, blow heat to the front end of the motor 8, and evaporate the moisture of the water-absorbing sponge 304 into water vapor;

[0039] Furthermore, if Figure 1 As shown, a heat dissipation port 14 is provided on the left side wall of the box body 1 , and there are multiple heat dissipation ports 14 . The fan 9 continues to blow water vapor and heat to the heat dissipation port 14 for discharge, thereby providing heat dissipation for the motor 8 and improving the water absorption capacity of the water-absorbing sponge 304 .

[0040] Furthermore, if Figure 1 As shown, a protective plate 10 is fixedly connected to the left side wall of the box body 1 , and the position of the protective plate 10 corresponds to the heat dissipation port 14 . The protective plate 10 can prevent liquids such as rainwater from entering the box body through the heat dissipation port 14 .

[0041] like Figure 2 As shown, the bottom of the box body 1 is fixedly mounted with supporting feet 13, and the number of the supporting feet 13 is four.

[0042] The working principle of the utility model is as follows: when in use, the motor 8 is placed on the fixing seat of the lower shell of the box body 1, and then the upper shell of the box body 1 is covered, and then the sealed bearing 12 is installed inside the second bearing seat 11 and the second bearing seat 11 is locked with a locking bolt, and the sealed bearing 12 will be locked inside the second bearing seat 11. At the same time, the upper shell of the box body 1 is fixedly connected with the rear side of the lower shell by the locking bolt, and the upper and lower shells of the box body 1 are completely closed, so that the motor 8 is isolated from the outside, providing the first waterproof measure;

[0043] When a small amount of liquid enters the interior of the housing 1 through the connection between the sealing bearing 12 and the rotating shaft 802, the absorbent sponge 304 in the housing 1 will absorb the liquid, preventing the liquid from entering the interior of the motor 8 through the connection between the rotating shaft 802 and the housing 801, thereby affecting the operation of the motor 8.

[0044] When the motor 8 is working, the rotating shaft 802 will drive the fan 9 to rotate and generate airflow, blowing the heat to the front end of the motor 8, evaporating the moisture of the water-absorbing sponge 304 into water vapor; and continue to blow the water vapor and heat to the heat dissipation port 14 for discharge, providing heat dissipation for the motor 8, while improving the water absorption capacity of the water-absorbing sponge 304, and at the same time the protective plate 10 can prevent liquids such as rainwater from entering the box body 1 through the heat dissipation port 14;

[0045] If the absorbent sponge 304 needs to be replaced, the baffle 307 is simply rotated to pull the handle 302 to pull out the sponge, and after the sponge is replaced, it is reinserted into the installation port 2, and the baffle 307 is turned back to fix the partition 301.

[0046] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. 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 three-phase asynchronous motor with a waterproof structure, comprising a housing (1), characterized in that: A through hole (4) is provided on the left side wall of the box body (1); a second bearing seat (11) is fixedly connected to the front side of the box body (1); the position of the second bearing seat (11) corresponds to the position of the through hole (4); the inner ring diameter of the second bearing seat (11) is larger than the diameter of the through hole (4); a sealed bearing (12) is installed inside the second bearing seat (11); mounting openings (2) are provided on the upper and lower surfaces of the box body (1); a waterproof component (3) is movably installed inside the mounting opening (2); the waterproof component (3) comprises a partition (301); the partition (301) is installed on the outer surface of the box body (1); a mounting seat (303) is fixedly connected to the inner surface of the partition (301); a water-absorbing sponge (304) is fixedly connected to the inner wall of the mounting seat (303); and a semicircular groove is provided on the end surface of the water-absorbing sponge (304).

2. A three-phase asynchronous motor with a waterproof structure according to claim 1, characterized in that: The upper and lower surfaces of the box body (1) are fixedly connected to a limit bearing (305), the limit bearing (305) is located on one side of the partition (301), a movable shaft (306) is movably installed inside the limit bearing (305), a baffle (307) is fixedly connected to the surface of the movable shaft (306), the lower surface of the baffle (307) is in contact with the outer surface of the partition (301), and a handle (302) is fixedly connected to the outer surface of the partition (301).

3. A three-phase asynchronous motor with a waterproof structure according to claim 2, characterized in that: Four fixing seats (5) are fixedly connected inside the box body (1), two of the fixing seats (5) are installed on the inner wall of the upper shell of the box body (1), and two of the fixing seats (5) are installed on the inner wall of the lower shell of the box body (1). A first bearing seat (6) is fixedly connected to the right inner wall of the lower shell of the box body (1), and a fixed bearing (7) is installed inside the first bearing seat (6).

4. A three-phase asynchronous motor with a waterproof structure according to claim 3, characterized in that: An electric motor (8) is installed inside the adjacent fixed seat (5), and the electric motor (8) comprises a housing (801), a rotating shaft (802), a stator (803), and a rotor (804). The rotating shaft (802) is installed inside the housing (801), the stator (803) is installed on the inner wall of the housing (801), and the rotor (804) is installed on the outer wall of the rotating shaft (802). The left end of the rotating shaft (802) extends to the outside of the box body (1) through a through hole (4), and the right end of the rotating shaft (802) is installed inside the fixed bearing (7). A fan (9) is fixedly connected to the right end surface of the rotating shaft (802), and the fan (9) is located between the first bearing seat (6) and the right end surface of the housing (801).

5. A three-phase asynchronous motor with a waterproof structure according to claim 4, characterized in that: The left side wall of the box body (1) is provided with a plurality of heat dissipation openings (14), and the left side wall of the box body (1) is fixedly connected with a protective plate (10), the position of the protective plate (10) corresponding to the heat dissipation openings (14).

6. A three-phase asynchronous motor with a waterproof structure according to claim 5, characterized in that: The box body (1) comprises an upper shell and a lower shell, the upper shell is mounted above the lower shell, and the upper shell and the lower shell are fixedly connected by locking bolts.

7. A three-phase asynchronous motor with a waterproof structure according to claim 6, characterized in that: Support feet (13) are fixedly mounted on the bottom of the box body (1), and the number of the support feet (13) is four.

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