Explosion-proof motor shell sealing structure

Abstract

The utility model discloses an explosion-proof motor shell sealing structure, which comprises a sealing ring arranged between a shell and a rear end cover, an inner ring block is integrally and fixedly connected to a port of the shell, a second outer ring body is fixedly connected to the surface of the inner ring block, and a first outer ring body is fixedly connected to the outer surface of a port of the rear end cover. By pulling a rod body on the inner ring of the inner ring block, the rod body drives a sliding block to slide on the inner surface of the barrel, the sliding block compresses a spring, and a limiting column connected to one side of the inner ring is inserted into a corresponding positioning hole, so that the rod body is loosened, and the tail end of the rod body is inserted into a limiting hole formed in the surface of the limiting column through the elastic force of the spring; and after one limiting column completes limiting, the other rod body on the inner ring of the inner ring block is pulled, so that the corresponding limiting hole is clamped with the other end of the rod body through the same clamping, and after the two positions are limited, the through hole in the sealing ring corresponds to the threaded hole in the second outer ring body at the moment.

Description

Technical Field

[0001] The utility model belongs to the technical field of explosion-proof motor shells, and particularly relates to a sealing structure for an explosion-proof motor shell. Background Technique

[0002] An explosion-proof motor is a type of motor that can be used in flammable and explosive places and does not generate electric sparks during operation. The sealing performance of the sealing ring of the explosion-proof motor is crucial. When it needs to be replaced regularly, the rear end cover needs to be removed, and then the through hole of the sealing ring is sleeved on the corresponding limit bolt, or the through hole on the sealing ring is aligned with the corresponding threaded hole by manual support, and finally the bolt is tightened.

[0003] However, when aligning in the above manner, errors are likely to occur. When the bolt is finally tightened, the sealing ring may be worn, and at the same time, if it is pre-sleeved on the bolt, the sealing ring will also be damaged, resulting in inconvenient installation of the sealing ring. Seriously, the sealing performance of the connection will be reduced. Therefore, we propose a sealing structure for an explosion-proof motor shell to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing structure for an explosion-proof motor shell, which has the purpose of facilitating the installation of the sealing ring and thus avoiding damage and reducing the sealing performance of the connection, so as to solve the above background technical problems.

[0005] The technical solution of the utility model to solve the above technical problems is as follows: A sealing structure for an explosion-proof motor shell, the structure includes a sealing ring arranged between the casing and the rear end cover. An inner ring block is integrally and fixedly connected to the port of the casing. An outer ring body II is fixedly connected to the surface of the inner ring block. An outer ring body I is fixedly connected to the outer surface of the port of the rear end cover. The outer ring body I and the outer ring body II are detachably connected by a limit bolt. An inner ring is integrally and fixedly connected to the inner circle of the sealing ring. A limit post is integrally injection-molded at a position on the end face of the inner ring close to the inner ring block and centrosymmetric with the center point of the inner ring. A limit hole is opened on the surface of the limit post. A cylinder is embedded and fixedly connected to a position on the inner circle of the inner ring block and centrosymmetric with the center point of the inner ring block. A sliding block is slidably connected to the inner surface of the cylinder. A rod body is fixedly connected to the inner surface of the sliding block. A spring is sleeved on the surface of the rod body. Two ends of the spring are respectively fixedly connected to one side of the sliding block and the inner wall of the cylinder. One end of the rod body penetrates through the cylinder and extends to the outside of the cylinder. A positioning hole is opened on the outer end face of the inner ring block. The other end of the rod body penetrates through the limit hole and extends to the inner cavity of the positioning hole.

[0006] Preferably, a sealing sleeve is sleeved on the surface of the limit bolt, and the surface of the sealing sleeve is in close fit with the outer ring body I.

[0007] Preferably, a through hole is formed in an annular shape on the outer end surface of the sealing ring.

[0008] Preferably, a threaded hole corresponding to the through hole is formed in an annular shape on the outer end surface of the second outer ring body, and the threaded hole penetrates through the inside of the second outer ring body.

[0009] Preferably, the limit bolt is adapted to the through hole and the threaded hole. The limit bolt penetrates through the through hole and is threadedly connected to the inner surface of the threaded hole. The sealing ring, the first outer ring body, and the second outer ring body are closely attached to each other.

[0010] Preferably, the inner ring is a plastic rubber ring.

[0011] 1. The beneficial effects of the present utility model are as follows: By pulling a rod body inside the inner ring block, the rod body drives the sliding block to slide on the inner surface of the cylinder body. At the same time, the sliding block compresses the spring, and the limit post connected to one side of the inner ring is inserted into the corresponding positioning hole. Then, the rod body is released. Due to the elastic force of the spring, the end of the rod body is inserted into the limit hole formed on the surface of the limit post. After the limit of one limit post is completed, pull another rod body inside the inner ring block, and use the same clamping method to make the corresponding limit hole engage with the other end of the rod body. After the two positions are limited, the through hole on the sealing ring corresponds to the threaded hole on the second outer ring body, thus replacing the method of manually assisting in alignment and pre-sleeving on the surface of the bolt, achieving convenient installation of the sealing ring, and avoiding damage and reducing the sealing performance at the connection.

[0012] 2. The present utility model is provided with a sealing sleeve to seal the connection between the limit bolt and the first outer ring body, reduce the gap, and thus reduce the degree of rust of the limit bolt.

[0013] 3. The present utility model is provided with a limit bolt adapted to the through hole and the threaded hole. The limit bolt penetrates through the through hole and is threadedly connected to the inner surface of the threaded hole. The limit bolt tightens the connection between the rear end cover and the second outer ring body, facilitating the disassembly and assembly of the rear end cover, and enabling the sealing ring to be filled between the first outer ring body and the second outer ring body.

[0014] 4. The present utility model is provided with an inner ring as a plastic rubber ring, which can change the shape of the inner ring by applying force, thus facilitating the disassembly and assembly of the sealing ring, and avoiding deformation on one side during the disassembly and assembly of the sealing ring, which may damage the structure formed by the entire sealing ring and the inner ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Among them:

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic diagram of the disassembly of the sealing ring and the rear end cover of the present utility model;

[0018] Figure 3 It is a partial enlarged view of point A of the present utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the limit post and the limit hole of the present utility model.

[0020] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0021] 1. Machine shell; 2. Rear end cover; 3. Sealing ring; 4. Outer ring body I; 5. Limit bolt; 6. Outer ring body II; 7. Inner ring; 8. Limit post; 9. Limit hole; 10. Inner ring block; 11. Cylinder; 12. Sliding block; 13. Spring; 14. Rod body; 15. Positioning hole; 16. Sealing sleeve; 17. Through hole; 18. Threaded hole. Detailed implementation manners

[0022] Hereinafter, embodiments of the explosion-proof motor housing sealing structure of the present utility model will be described with reference to the accompanying drawings.

[0023] Embodiment 1:

[0024] Figures 1-4The sealed structure of an explosion-proof motor housing according to the present utility model is shown. This structure includes a sealing ring 3 disposed between a housing 1 and a rear end cover 2. An inner ring block 10 is integrally and fixedly connected to the port of the housing 1. An outer ring body II 6 is fixedly connected to the surface of the inner ring block 10. An outer ring body I 4 is fixedly connected to the outer surface of the port of the rear end cover 2. The outer ring body I 4 and the outer ring body II 6 are detachably connected by a limit bolt 5. A sealing sleeve 16 is sleeved on the surface of the limit bolt 5, and the surface of the sealing sleeve 16 is in close fit with the outer ring body I 4. By providing the sealing sleeve 16, the connection between the limit bolt 5 and the outer ring body I 4 is sealed, reducing the gap, thereby reducing the degree of rust of the limit bolt 5. An inner ring 7 is integrally and fixedly connected to the inner ring of the sealing ring 3. The inner ring 7 is a plastic rubber ring. By providing the inner ring 7 as a plastic rubber ring, the shape of the inner ring 7 can be changed by force, which facilitates the disassembly and assembly of the sealing ring 3, and avoids deformation on one side during the disassembly and assembly of the sealing ring 3, damaging the structure formed by the entire sealing ring 3 and the inner ring 7. A limit post 8 is integrally injection-molded at the end face of the inner ring 7 close to the inner ring block 10 and at a position centrosymmetric with the center point of the inner ring 7. A limit hole 9 is provided on the surface of the limit post 8. A cylinder 11 is embedded and fixedly connected to the inner ring of the inner ring block 10 and at a position centrosymmetric with the center point of the inner ring block 10. A sliding block 12 is slidably connected to the inner surface of the cylinder 11. A rod body 14 is fixedly connected to the inner surface of the sliding block 12. A spring 13 is sleeved on the surface of the rod body 14. Both ends of the spring 13 are fixedly connected to one side of the sliding block 12 and the inner wall of the cylinder 11 respectively. One end of the rod body 14 passes through the cylinder 11 and extends to the outside of the cylinder 11. A positioning hole 15 is provided on the outer end face of the inner ring block 10. The other end of the rod body 14 passes through the limit hole 9 and extends into the inner cavity of the positioning hole 15. By pulling a rod body 14 inside the inner ring block 10, the rod body 14 drives the sliding block 12 to slide on the inner surface of the cylinder 11. At the same time, the sliding block 12 compresses the spring 13. At the same time, the limit post 8 connected to one side of the inner ring 7 is inserted into the corresponding positioning hole 15. Then the rod body 14 is released. By the elastic force of the spring 13, the end of the rod body 14 is inserted into the limit hole 9 provided on the surface of the limit post 8. After one limit post 8 is limited, another rod body 14 inside the inner ring block 10 is pulled, and the corresponding limit hole 9 is clamped with the other end of the rod body 14 by using the same clamping method. After two positions are limited, the through hole 17 on the sealing ring 3 corresponds to the threaded hole 18 on the outer ring body II 6, thus replacing the way of holding and assisting the correspondence and pre-sleeving on the surface of the bolt, achieving the purpose of convenient installation of the sealing ring, and avoiding damage and reducing the sealing performance of the connection.

[0025] Embodiment 2:

[0026] Figures 1-4The sealed structure of an explosion-proof motor housing according to the present utility model is shown. This structure includes a sealing ring 3 disposed between a housing 1 and a rear end cover 2. An inner ring block 10 is integrally and fixedly connected to the port of the housing 1. An outer ring body two 6 is fixedly connected to the surface of the inner ring block 10. An outer ring body one 4 is fixedly connected to the outer surface of the port of the rear end cover 2. The outer ring body one 4 and the outer ring body two 6 are detachably connected by a limit bolt 5. A through hole 17 is formed in a circular shape on the outer end surface of the sealing ring 3. A threaded hole 18 corresponding to the through hole 17 is formed in a circular shape on the outer end surface of the outer ring body two 6. The threaded hole 18 penetrates through the inside of the outer ring body two 6. The limit bolt 5 is adapted to the through hole 17 and the threaded hole 18. The limit bolt 5 penetrates through the through hole 17 and is threadedly connected to the inner surface of the threaded hole 18. The sealing ring 3, the outer ring body one 4, and the outer ring body two 6 are closely attached to each other. By providing that the limit bolt 5 is adapted to the through hole 17 and the threaded hole 18, and the limit bolt 5 penetrates through the through hole 17 and is threadedly connected to the inner surface of the threaded hole 18, the rear end cover 2 and the outer ring body two 6 are fastened by the limit bolt 5, facilitating the disassembly and assembly of the rear end cover 2. Thus, the sealing ring 3 is filled between the outer ring body one 4 and the outer ring body two 6. An inner ring 7 is integrally and fixedly connected to the inner ring of the sealing ring 3. A limit post 8 is integrally injection-molded at a position on the end surface of the inner ring 7 close to the inner ring block 10 and symmetric with the center point of the inner ring 7. A limit hole 9 is formed on the surface of the limit post 8. A cylinder 11 is embedded and fixedly connected to a position on the inner ring of the inner ring block 10 and symmetric with the center point of the inner ring block 10. A sliding block 12 is slidably connected to the inner surface of the cylinder 11. A rod body 14 is fixedly connected to the inner surface of the sliding block 12. A spring 13 is sleeved on the surface of the rod body 14. Two ends of the spring 13 are respectively fixedly connected to one side of the sliding block 12 and the inner wall of the cylinder 11. One end of the rod body 14 penetrates through the cylinder 11 and extends to the outside of the cylinder 11. A positioning hole 15 is formed on the outer end surface of the inner ring block 10. The other end of the rod body 14 penetrates through the limit hole 9 and extends into the inner cavity of the positioning hole 15.

[0027] Working principle: In the present utility model, by pulling a rod body 14 inside the inner ring of the inner ring block 10, the rod body 14 drives the sliding block 12 to slide on the inner surface of the cylinder 11. At the same time, the sliding block 12 compresses the spring 13. Meanwhile, the limit post 8 connected to one side of the inner ring 7 is inserted into the corresponding positioning hole 15. Then, the rod body 14 is released. Due to the elastic force of the spring 13, the end of the rod body 14 is inserted into the limit hole 9 formed on the surface of the limit post 8. After the positioning of one limit post 8 is completed, another rod body 14 inside the inner ring of the inner ring block 10 is pulled, and by using the same clamping method, the corresponding limit hole 9 is clamped with the other end of the rod body 14. After the positioning at two positions, at this time, the through hole 17 on the sealing ring 3 corresponds to the threaded hole 18 on the outer ring body two 6. Thus, the corresponding limit bolt 5 is inserted into the corresponding through hole 17 and is threadedly connected to the threaded hole 18, making the sealing ring 3 closely attached between the outer ring body one 4 and the outer ring body two 6.

[0028] In summary, for the explosion-proof motor housing sealing structure, through the settings of the inner ring 7, the limit posts 8, the limit holes 9, the inner ring blocks 10, the cylinder 11, the sliding blocks 12, the springs 13, the rod bodies 14 and the positioning holes 15, the installation of the sealing ring is facilitated and the situation of damage is avoided.

Claims

1. An explosion-proof motor housing sealing structure, the structure comprising a sealing ring (3) arranged between a housing (1) and a rear end cover (2), an inner ring block (10) is integrally fixedly connected to the port of the housing (1), an outer ring body 2 (6) is fixedly connected to the surface of the inner ring block (10), an outer ring body 1 (4) is fixedly connected to the outer surface of the port of the rear end cover (2), the outer ring body 1 (4) and the outer ring body 2 (6) are detachably connected by a limit bolt (5), characterized in that: The inner ring of the sealing ring (3) is integrally fixedly connected with the inner ring (7); a limiting column (8) is integrally injection-molded at a position close to the end surface of the inner ring block (10) and symmetrical with the axis point of the inner ring (7); a limiting hole (9) is provided on the surface of the limiting column (8); the inner ring of the inner ring block (10) is embedded and fixedly connected with a cylinder (11) at a position symmetrical with the axis point of the inner ring block (10); a sliding block (12) is slidably connected to the inner surface of the cylinder (11); A rod body (14) is fixedly connected to the inner surface of the moving block (12), a spring (13) is sleeved on the surface of the rod body (14), two ends of the spring (13) are respectively fixedly connected to one side of the sliding block (12) and the inner wall of the cylinder (11), one end of the rod body (14) passes through the cylinder (11) and extends to the outside of the cylinder (11), a positioning hole (15) is opened on the outer end surface of the inner ring block (10), and the other end of the rod body (14) passes through the limiting hole (9) and extends to the inner cavity of the positioning hole (15).

2. The explosion-proof motor housing sealing structure according to claim 1, characterized in that: The surface of the limiting bolt (5) is sleeved with a sealing sleeve (16), and the surface of the sealing sleeve (16) is tightly fitted with the outer ring body (4).

3. The explosion-proof motor housing sealing structure according to claim 1, characterized in that: The outer end surface of the sealing ring (3) is provided with a through hole (17) in an annular shape.

4. The explosion-proof motor housing sealing structure according to claim 3, characterized in that: The outer end surface of the second outer ring body (6) is provided with a threaded hole (18) in an annular shape corresponding to the through hole (17), and the threaded hole (18) passes through the interior of the second outer ring body (6).

5. The explosion-proof motor housing sealing structure according to claim 4, characterized in that: The limiting bolt (5) is compatible with the through hole (17) and the threaded hole (18); the limiting bolt (5) passes through the through hole (17) and is threadedly connected to the inner surface of the threaded hole (18); the sealing ring (3), the outer ring body 1 (4) and the outer ring body 2 (6) are tightly fitted.

6. The explosion-proof motor housing sealing structure according to claim 1, characterized in that: The inner ring (7) is a plastic rubber ring.

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