Moisture-proof and dust-proof double-sealing three-phase asynchronous motor

Abstract

The utility model belongs to the technical field of three-phase asynchronous motors, and particularly relates to a moisture-proof and dust-proof double-sealing three-phase asynchronous motor, which comprises a shell, a right end cover positioned on the right side of the shell and a left end cover positioned on the left side of the shell, the right end of the shell is fixedly connected with two first sealing gaskets which extrude the right end cover, and the left side of the right end cover is fixedly connected with a first annular plate which is located between the two first sealing gaskets and extends into the first annular groove. The right end cover extrudes the two first sealing gaskets, so that the right end cover and the shell can be sealed for the first time, and the right end cover and the shell can be sealed for the second time through a first O-shaped sealing ring; the second sealing gasket is extruded by the left end cover, so that the left end cover and the shell can be sealed for the first time, and the second O-shaped sealing ring can be used for sealing the left end cover and the shell for the second time, so that the right end cover and the left end cover can be subjected to double sealing respectively, and the double-sealing structure has moisture-proof and dust-proof effects.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-phase asynchronous motors, in particular to a moisture-proof and dust-proof double-sealed three-phase asynchronous motor. Background Art

[0002] The three-phase asynchronous motor is a type of induction motor, which is powered by 380V three-phase AC current (phase difference of 120 degrees) at the same time. Since the rotor and stator rotating magnetic field 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. The speed of the rotor of the three-phase asynchronous motor is lower than the speed of the rotating magnetic field. The rotor winding generates electromotive force and current due to the relative motion between the rotor winding and the magnetic field, and interacts with the magnetic field to generate electromagnetic torque to achieve energy conversion. Compared with the single-phase asynchronous motor, the three-phase asynchronous motor has good operating performance and can save various materials.

[0003] In the prior art, three-phase asynchronous motors are generally only used in normal environments, and the housing and the end cover are usually fixed directly by bolts, without a moisture-proof and dust-proof sealing structure. Summary of the invention

[0004] The utility model aims to provide a moisture-proof and dust-proof double-sealed three-phase asynchronous motor, which can double-seal the right end cover and the left end cover respectively, so that the utility model has the functions of moisture-proof and dust-proof.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a moisture-proof and dust-proof double-sealed three-phase asynchronous motor, comprising a housing, a right end cover located on the right side of the housing, and a left end cover located on the left side of the housing, the right end of the housing is provided with a first annular groove, the right end of the housing is fixedly connected to two first sealing gaskets that are extruded by the right end cover, the left side of the right end cover is fixedly connected to a first annular plate that is located between the two first sealing gaskets and extends to the inside of the first annular groove, the outer wall of the first annular plate is provided with a first mounting groove, and the inside of the first mounting groove is fixedly connected to a first O-shaped sealing ring that is extruded by the inner wall of the first annular groove;

[0006] A second annular groove is provided on the left side of the shell, two second sealing gaskets pressed against the left end cover are fixedly connected to the left side of the shell, a second annular plate located between the two second sealing gaskets and extending into the second annular groove is fixedly connected to the right end of the left end cover, a second mounting groove is provided on the outer wall of the second annular plate, and a second O-ring pressed against the inner wall of the second annular groove is fixedly connected to the inside of the second mounting groove;

[0007] The upper and lower sides of the left end cover are fixedly connected with fixed blocks, the right sides of the two fixed blocks are penetrated with guide holes, and sliding rods are arranged inside the two guide holes, the upper and lower sides of the right end cover are fixedly connected with ear plates, the right sides of the two ear plates are penetrated with through grooves, and the upper and lower sides of the inner walls of the two through grooves are provided with limiting grooves, the right sides of the two sliding rods are rotatably connected with rotating rods passing through the two through grooves through bearings, the right sides of the two rotating rods are fixedly connected with limit blocks located inside the two limit grooves on the same side, and the left sides of the two sliding rods are provided with tensioning mechanisms.

[0008] In order to facilitate tightening the right end cover and the left end cover in opposite directions, as a preferred moisture-proof and dust-proof double-sealed three-phase asynchronous motor of the utility model, the two tightening mechanisms include screws respectively fixedly connected to the left ends of the two sliding rods, and the outer walls of the two screws are threadedly connected with tightening blocks abutting the left sides of the two fixed blocks.

[0009] In order to enhance the stability of the movement of the two slide bars, as a preferred moisture-proof and dust-proof double-sealed three-phase asynchronous motor of the utility model, the two slide bars are slidably connected to the inside of the two guide holes through two sliders distributed front and back.

[0010] In order to allow the two limit blocks to pass through the two through slots smoothly, as a preferred moisture-proof and dust-proof double-sealed three-phase asynchronous motor of the utility model, the distance between the front and rear sides of the two through slots is greater than the distance between the upper and lower parts of the two limit blocks.

[0011] In order to prevent the right end cover, the left end cover and the outer casing from being misaligned when being installed, as a preferred moisture-proof and dust-proof double-sealed three-phase asynchronous motor of the utility model, the inner wall of the first annular plate fits with the inner wall of the first annular groove, and the inner wall of the second annular plate fits with the inner wall of the second annular groove.

[0012] In order to prevent the two tightening blocks from being lost, as a preferred embodiment of the moisture-proof and dust-proof double-sealed three-phase asynchronous motor of the utility model, the left ends of the two screws are fixedly connected to a limiting disk.

[0013] In order to prevent slipping when the two tightening blocks are rotated, as a preferred embodiment of a moisture-proof and dust-proof double-sealed three-phase asynchronous motor of the utility model, the outer walls of the two tightening blocks are provided with anti-slip grooves.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] When the utility model is used, the two limit blocks are passed through the two passing grooves, and then the two limit blocks are rotated to enter the two limit grooves on the same side respectively, and then the right end cover and the left end cover are tightened in opposite directions by the tightening mechanism, so that the right end cover and the two first sealing gaskets are squeezed, and the right end cover and the shell can be sealed for the first time, and the right end cover and the shell can be sealed for the second time by the first O-ring; at the same time, the second sealing gasket is squeezed by the left end cover, and the left end cover and the shell can be sealed for the first time, and the left end cover and the shell can be sealed for the second time by the second O-ring, so that the right end cover and the left end cover can be double-sealed respectively, so that the utility model has the functions of moisture-proof and dust-proof. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of a partial cross-sectional structure of the main body of the utility model;

[0018] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the slide bar connection of the utility model;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure connected at the right end cover of the utility model.

[0021] In the figure: 1. outer shell; 2. right end cover; 3. left end cover; 4. first annular groove; 5. first sealing gasket; 6. first annular plate; 7. first mounting groove; 8. first O-ring; 9. second annular groove; 10. second sealing gasket; 11. second annular plate; 12. second O-ring; 13. fixing block; 14. guide hole; 15. sliding rod; 16. rotating rod; 17. ear plate; 18. through groove; 19. limiting groove; 20. limiting block; 21. screw; 22. tightening block; 23. second mounting groove. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention 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 invention and are not used to limit the present invention.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] See also Figures 1 to 4 A moisture-proof and dust-proof double-sealed three-phase asynchronous motor comprises a housing 1, a right end cover 2 located on the right side of the housing 1 and a left end cover 3 located on the left side of the housing 1, a first annular groove 4 is provided at the right end of the housing 1, two first sealing gaskets 5 which are pressed against the right end cover 2 are fixedly connected to the right end of the housing 1, a first annular plate 6 which is located between the two first sealing gaskets 5 and extends to the inside of the first annular groove 4 is fixedly connected to the left side of the right end cover 2, a first mounting groove 7 is provided on the outer wall of the first annular plate 6, and a first O-ring 8 which is pressed against the inner wall of the first annular groove 4 is fixedly connected to the inside of the first mounting groove 7;

[0025] A second annular groove 9 is formed on the left side of the housing 1, and two second sealing gaskets 10 that are pressed against the left end cover 3 are fixedly connected to the left side of the housing 1. A second annular plate 11 that is located between the two second sealing gaskets 10 and extends to the inside of the second annular groove 9 is fixedly connected to the right end of the left end cover 3. A second mounting groove 23 is formed on the outer wall of the second annular plate 11, and a second O-ring 12 that is pressed against the inner wall of the second annular groove 9 is fixedly connected to the inside of the second mounting groove 23.

[0026] The upper and lower sides of the left end cover 3 are fixedly connected with fixed blocks 13, the right sides of the two fixed blocks 13 are penetrated with guide holes 14, and the inside of the two guide holes 14 are provided with slide rods 15, the upper and lower sides of the right end cover 2 are fixedly connected with ear plates 17, the right sides of the two ear plates 17 are penetrated with through grooves 18, and the upper and lower sides of the inner walls of the two through grooves 18 are provided with limiting grooves 19, the right sides of the two slide rods 15 are rotatably connected with rotating rods 16 passing through the two through grooves 18 through bearings, the right sides of the two rotating rods 16 are fixedly connected with limit blocks 20 located inside the two limit grooves 19 on the same side, and the left sides of the two slide rods 15 are provided with tensioning mechanisms.

[0027] In this embodiment, when in use, the two slide bars 15 are slid to the right, so that the two rotating bars 16 and the two limit blocks 20 move to the right and pass through the two passing grooves 18 until the two limit blocks 20 are respectively located on the right side of the two ear plates 17, and then the two limit blocks 20 are rotated by the two rotating bars 16 until the two limit blocks 20 correspond to the positions of the two limit grooves 19 on the same side, and then the two limit blocks 20 enter the inside of the two limit grooves 19 on the same side respectively, and then the right end cover 2 and the left end cover 3 are tightened in opposite directions by the tightening mechanism, so that the right end cover 2 is aligned with the two first sealing gaskets 5. By extrusion, the right end cover 2 and the outer shell 1 can be sealed for the first time, and because the first O-ring 8 is squeezed with the inner wall of the first annular groove 4, the right end cover 2 and the outer shell 1 can be sealed for the second time through the first O-ring; at the same time, by squeezing the second sealing gasket 10 through the left end cover 3, the left end cover 3 and the outer shell 1 can be sealed for the first time, and because the second O-ring 12 is squeezed with the inner wall of the second annular groove 9, the left end cover 3 and the outer shell 1 can be sealed for the second time, so that the right end cover 2 and the left end cover 3 can be double-sealed respectively, so that the utility model has the function of moisture-proof and dust-proof.

[0028] As a technical optimization solution of the utility model, the two tensioning mechanisms include screws 21 fixedly connected to the left ends of the two slide rods 15 respectively, and the outer walls of the two screws 21 are threadedly connected with tightening blocks 22 abutting against the left sides of the two fixed blocks 13.

[0029] In this embodiment, the two tightening blocks 22 are rotated respectively to be pressed against the two fixing blocks 13 respectively, and at the same time, the right end cover 2 and the left end cover 3 can be tightened in opposite directions respectively through the two sliding rods 15, the two rotating rods 16 and the two limiting blocks 20.

[0030] As a technical optimization solution of the present invention, the two slide bars 15 are slidably connected to the inside of the two guide holes 14 through two sliding blocks distributed front and back, respectively.

[0031] In this embodiment, by providing two sliding blocks, the stability of the movement of the two sliding rods 15 is enhanced.

[0032] As a technical optimization solution of the present invention, the distance between the front and rear sides of the two through slots 18 is greater than the distance between the upper and lower sides of the two limit blocks 20 .

[0033] In this embodiment, by making the distance between the front and rear sides of the two passing grooves 18 larger than the distance between the upper and lower sides of the two limiting blocks 20 , the two limiting blocks 20 can smoothly pass through the two passing grooves 18 .

[0034] As a technical optimization solution of the present invention, the inner wall of the first annular plate 6 fits with the inner wall of the first annular groove 4 , and the inner wall of the second annular plate 11 fits with the inner wall of the second annular groove 9 .

[0035] In the present embodiment: by making the inner wall of the first annular plate 6 fit with the inner wall of the first annular groove 4, the right end cover 2 can be prevented from being misaligned with the outer shell 1 when the right end cover 2 is installed; by making the inner wall of the second annular plate 11 fit with the inner wall of the second annular groove 9, the left end cover 3 can be prevented from being misaligned with the outer shell 1 when the left end cover 3 is installed.

[0036] As a technical optimization solution of the present invention, the left ends of the two screw rods 21 are fixedly connected to the limiting disk.

[0037] In this embodiment, two limit plates are provided to prevent the two tightening blocks from being lost.

[0038] As a technical optimization solution of the present invention, the outer walls of the two tightening blocks 22 are both provided with anti-slip grooves.

[0039] In this embodiment, the anti-skid pattern is provided to prevent the two tightening blocks 22 from skidding when they rotate.

[0040] Working principle: When the utility model is used, firstly, the two slide bars 15 are slid to the right, so that the two rotating bars 16 and the two limit blocks 20 move to the right and pass through the two through slots 18 until the two limit blocks 20 are respectively located on the right side of the two ear plates 17, and then the two limit blocks 20 are rotated by the two rotating bars 16 until the two limit blocks 20 correspond to the positions of the two limit slots 19 on the same side, and then the two limit blocks 20 are respectively entered into the two limit slots 19 on the same side, and then the two tightening blocks 22 are respectively rotated to make them squeeze the two fixed blocks 13 respectively, and at the same time, the right end cover 2 and the left end cover 2 can be respectively moved by the two slide bars 15, the two rotating bars 16 and the two limit blocks 20. The end cover 3 is tightened in opposite directions so that the right end cover 2 is squeezed against the two first sealing gaskets 5, so that the right end cover 2 and the outer shell 1 can be sealed for the first time, and because the first O-ring 8 is squeezed against the inner wall of the first annular groove 4, the right end cover 2 and the outer shell 1 can be sealed for the second time through the first O-ring; at the same time, the second sealing gasket 10 is squeezed by the left end cover 3, so that the left end cover 3 and the outer shell 1 can be sealed for the first time, and because the second O-ring 12 is squeezed against the inner wall of the second annular groove 9, the left end cover 3 and the outer shell 1 can be sealed for the second time, so that the right end cover 2 and the left end cover 3 can be double-sealed respectively, so that the utility model has the functions of moisture-proof and dust-proof.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A moisture-proof and dust-proof double-sealed three-phase asynchronous motor, comprising a housing (1), a right end cover (2) located on the right side of the housing (1), and a left end cover (3) located on the left side of the housing (1), characterized in that: A first annular groove (4) is provided at the right end of the housing (1); two first sealing gaskets (5) that are pressed against the right end cover (2) are fixedly connected to the right end of the housing (1); a first annular plate (6) located between the two first sealing gaskets (5) and extending into the first annular groove (4) is fixedly connected to the left side of the right end cover (2); a first mounting groove (7) is provided on the outer wall of the first annular plate (6); a first O-ring (8) that is pressed against the inner wall of the first annular groove (4) is fixedly connected to the inside of the first mounting groove (7); A second annular groove (9) is provided on the left side of the housing (1); two second sealing gaskets (10) which are pressed against the left end cover (3) are fixedly connected to the left side of the housing (1); a second annular plate (11) which is located between the two second sealing gaskets (10) and extends into the second annular groove (9) is fixedly connected to the right end of the left end cover (3); a second mounting groove (23) is provided on the outer wall of the second annular plate (11); a second O-ring (12) which is pressed against the inner wall of the second annular groove (9) is fixedly connected to the inside of the second mounting groove (23); The left end cover (3) is fixedly connected with a fixing block (13) on both upper and lower sides, and a guide hole (14) is penetrated through the right side of the two fixing blocks (13), and a sliding rod (15) is arranged inside the two guide holes (14). The right end cover (2) is fixedly connected with an ear plate (17) on both upper and lower sides, and a through groove (18) is penetrated through the right side of the two ear plates (17). The upper and lower sides of the inner wall of the two through grooves (18) are provided with a limiting groove (19). The right side of the two sliding rods (15) is rotatably connected with a rotating rod (16) passing through the two through grooves (18) through a bearing, and the right side of the two rotating rods (16) is fixedly connected with a limiting block (20) located inside the two limiting grooves (19) on the same side, and the left side of the two sliding rods (15) is provided with a tensioning mechanism.

2. A moisture-proof and dust-proof double-sealed three-phase asynchronous motor according to claim 1, characterized in that: The two tensioning mechanisms include screw rods (21) respectively fixedly connected to the left ends of the two sliding rods (15), and the outer walls of the two screw rods (21) are threadedly connected with tightening blocks (22) abutting against the left sides of the two fixing blocks (13).

3. A moisture-proof and dust-proof double-sealed three-phase asynchronous motor according to claim 1, characterized in that: The two sliding rods (15) are respectively slidably connected to the inside of the two guide holes (14) through two sliding blocks distributed front and back.

4. The moisture-proof and dust-proof double-sealed three-phase asynchronous motor according to claim 1 is characterized in that: The distance between the front and rear sides of the two through slots (18) is greater than the distance between the upper and lower sides of the two limit blocks (20).

5. The moisture-proof and dust-proof double-sealed three-phase asynchronous motor according to claim 1 is characterized in that: The inner wall of the first annular plate (6) fits in with the inner wall of the first annular groove (4), and the inner wall of the second annular plate (11) fits in with the inner wall of the second annular groove (9).

6. A moisture-proof and dust-proof double-sealed three-phase asynchronous motor according to claim 2, characterized in that: The left ends of the two screw rods (21) are fixedly connected to a limiting disk.

7. The moisture-proof and dust-proof double-sealed three-phase asynchronous motor according to claim 2 is characterized in that: The outer walls of the two tightening blocks (22) are both provided with anti-slip grooves.

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