Motor outgoing line sealing structure

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a motor outgoing line sealing structure which comprises a rear end cover, a through hole is arranged on the side wall of the rear end cover, a copper bolt is arranged in the through hole, a bolt head of the copper bolt is arranged on the inner side of the rear end cover, and the copper bolt penetrates through the through hole and extends to the outer side of the rear end cover. The copper bolt located on the outer side of the rear end cover is in threaded connection with a flange face locknut, a first insulation pad is arranged between a bolt head of the copper bolt and the inner wall of the rear end cover, a second insulation pad is arranged on the outer wall of the rear end cover, a sealing pad is arranged between the first insulation pad and the second insulation pad, and the flange face locknut, the second insulation pad, the sealing pad and the first insulation pad are sequentially connected. The copper bolt penetrates through the first insulation pad, the sealing pad, the second insulation pad and the flange face locknut and is connected with the outgoing line. According to the utility model, the copper bolt is arranged to avoid the problem of sealing failure caused when the outgoing line is stressed, and the first insulation pad and the second insulation pad are arranged to increase the sealing performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a sealing structure for a motor lead-out line. Background Art

[0002] The sealing structure of the motor lead wire is a key part to ensure the stable operation and long service life of the motor. The main function of this sealing structure is to prevent moisture, dust and other pollutants from entering the motor, thereby protecting the motor from damage.

[0003] The commonly used sealing structure at present is to use a sealing sleeve directly on the lead-out wire, and ensure a tight fit through a specific connection method (such as threaded connection, clamp fixation, etc.). The sealant is filled between the inside of the sealing sleeve and the lead-out wire to improve the sealing performance; at the same time, the motor end cover is provided with a wire outlet hole, and the sealing sleeve passes through the wire outlet hole. A sealing ring is set between the outer surface of the sealing sleeve and the wire outlet hole to further enhance the sealing effect.

[0004] However, when the above structure is in use, the lead wire is subjected to stress, which may cause displacement of the connection between the sealant and the sealing sleeve, resulting in seal failure. In severe cases, the lead wire may even fall off, affecting normal use. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a sealing structure for motor lead wires, which improves the sealing performance and avoids the problem of sealing failure caused by the lead wires being subjected to force.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The motor lead-out sealing structure described in the utility model comprises a rear end cover, a through hole is arranged on the side wall of the rear end cover, a copper bolt is arranged in the through hole, a bolt head of the copper bolt is arranged on the inner side of the rear end cover, the copper bolt passes through the through hole and extends to the outer side of the rear end cover, a flange surface anti-loosening nut is threadedly connected on the copper bolt located on the outer side of the rear end cover, an insulating pad 1 is arranged between the bolt head of the copper bolt and the inner wall of the rear end cover, an insulating pad 2 is arranged on the outer wall of the rear end cover, a sealing pad is arranged between the insulating pad 1 and the insulating pad 2, the flange surface anti-loosening nut, the insulating pad 2, the sealing pad and the insulating pad 1 are connected in sequence, the copper bolt passes through the insulating pad 1, the sealing pad, the insulating pad 2 and the flange surface anti-loosening nut, and the copper bolt is connected to the lead-out wire.

[0008] The provision of the first insulating pad and the second insulating pad can increase the sealing performance, and the provision of the sealing pad further increases the sealing performance.

[0009] A square boss is arranged on the bolt head of the copper bolt, and the square boss is connected to the screw rod of the copper bolt.

[0010] The insulating pad 1 is matched with the square boss to be provided with a square through hole, which can increase the sealing and waterproof properties.

[0011] The height of the square boss is equal to the thickness of the square through hole, which further ensures the sealing performance of the insulating pad.

[0012] The outer diameter of the insulating pad is larger than the inner diameter of the through hole on the rear end cover.

[0013] The second insulating pad is arranged in a stepped shaft shape as a whole.

[0014] The small diameter end of the insulating pad 2 is arranged in the through hole on the rear end cover to further increase the sealing performance; a groove is arranged on the outer wall of the rear end cover to match the large diameter end of the insulating pad 2 to ensure the stability of the setting of the insulating pad 2.

[0015] A through hole is arranged in the middle of the second insulating pad to match the copper bolt.

[0016] A cap is sleeved on the outer side of the flange surface anti-loosening nut. The setting of the cap can provide waterproof and protective effects.

[0017] The number of flange surface lock nuts is 2.

[0018] The utility model has the beneficial effects that: the arrangement of the copper bolt avoids the problem of sealing failure caused by the lead wire being subjected to force, and the arrangement of the first insulating pad and the second insulating pad can increase the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] In the figure: 1. rear end cover; 2. copper bolt; 3. insulating gasket 1; 4. sealing gasket; 5. insulating gasket 2; 6. flange surface anti-loosening nut; 7. cover cap. DETAILED DESCRIPTION

[0021] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0022] like Figure 1 As shown, the utility model includes a rear end cover 1, a through hole is provided on the side wall of the rear end cover 1, a copper bolt 2 is provided in the through hole, a bolt head of the copper bolt 2 is provided on the inner side of the rear end cover 1, the copper bolt 2 passes through the through hole and extends to the outer side of the rear end cover 1, a flange surface anti-loosening nut 6 is threadedly connected on the copper bolt 2 located on the outer side of the rear end cover 1, an insulating pad 1 3 is provided between the bolt head of the copper bolt 2 and the inner wall of the rear end cover 1, an insulating pad 2 5 is provided on the outer wall of the rear end cover 1, a sealing pad 4 is provided between the insulating pad 1 3 and the insulating pad 2 5, the flange surface anti-loosening nut 6, the insulating pad 2 5, the sealing pad 4 and the insulating pad 1 3 are connected in sequence, the copper bolt 2 passes through the insulating pad 1 3, the sealing pad 4, the insulating pad 2 5 and the flange surface anti-loosening nut 6, and the copper bolt 2 is connected to the lead-out wire.

[0023] The provision of the insulating pad 1 3 and the insulating pad 2 5 can increase the sealing performance, and the provision of the sealing pad 4 further increases the sealing performance.

[0024] A square boss is arranged on the bolt head of the copper bolt 2 , and the square boss is connected to the screw rod of the copper bolt 2 .

[0025] The insulating pad 3 is matched with the square boss to be provided with a square through hole, which can increase the sealing and waterproof properties.

[0026] The height of the square boss is equal to the thickness of the square through hole, which further ensures the sealing of the insulating pad 3.

[0027] The outer diameter of the insulating pad 3 is larger than the inner diameter of the through hole on the rear end cover 1.

[0028] The insulating pad 2 5 is arranged in a stepped shaft shape as a whole.

[0029] The small diameter end of the insulating pad 25 is arranged in the through hole on the rear end cover 1 to further increase the sealing performance; a groove is arranged on the outer wall of the rear end cover 1 to match the large diameter end of the insulating pad 25 to ensure the stability of the setting of the insulating pad 25.

[0030] A through hole is provided in the middle of the insulating pad 5 to match the copper bolt 2.

[0031] The outer side of the flange surface anti-loosening nut 6 is sleeved with a cap 7. The setting of the cap 7 can provide waterproof and protective effects.

[0032] The number of flange surface anti-loosening nuts 6 is 2 to ensure that the copper bolts 2 are firmly set.

[0033] When in use, the bolt head of the copper bolt 2 is welded to the motor lead wire, and the tail end of the copper bolt 2 is also welded to the motor lead wire. When the motor lead wire is subjected to force, the copper bolt 2 and the motor lead wire in the rear end cover 1 will not fall off, and the sealing will not be affected.

Claims

1. A sealing structure for a motor lead wire, comprising a rear end cover (1), characterized in that: A through hole is provided on the side wall of the rear end cover (1), a copper bolt (2) is provided in the through hole, a bolt head of the copper bolt (2) is provided on the inner side of the rear end cover (1), the copper bolt (2) passes through the through hole and extends to the outer side of the rear end cover (1), a flange surface anti-loosening nut (6) is threadedly connected to the copper bolt (2) located on the outer side of the rear end cover (1), an insulating pad (1) (3) is provided between the bolt head of the copper bolt (2) and the inner wall of the rear end cover (1), an insulating pad (2) (5) is provided on the outer wall of the rear end cover (1), a sealing pad (4) is provided between the insulating pad (1) (3) and the insulating pad (2) (5), the flange surface anti-loosening nut (6), the insulating pad (2) (5), the sealing pad (4) and the insulating pad (1) (3) are connected in sequence, the copper bolt (2) passes through the insulating pad (1) (3), the sealing pad (4), the insulating pad (2) (5) and the flange surface anti-loosening nut (6), and the copper bolt (2) is connected to the lead wire.

2. The motor lead wire sealing structure according to claim 1, characterized in that: A square boss is provided on the bolt head of the copper bolt (2), and the square boss is connected to the screw rod of the copper bolt (2).

3. The sealing structure for the motor lead wire according to claim 2, characterized in that: The insulating pad 1 (3) is provided with a square through hole in cooperation with the square boss.

4. The sealing structure for the motor lead wire according to claim 3, characterized in that: The height of the square boss is equal to the thickness of the square through hole.

5. The sealing structure for the motor lead wire according to claim 1, characterized in that: The outer diameter of the insulating pad 1 (3) is larger than the inner diameter of the through hole on the rear end cover (1).

6. The sealing structure for the motor lead wire according to claim 1, characterized in that: The second insulating pad (5) is arranged in a stepped shaft shape as a whole.

7. The sealing structure for the motor lead wire according to claim 6, characterized in that: The small diameter end of the second insulating pad (5) is arranged in the through hole on the rear end cover (1), and a groove is arranged on the outer wall of the rear end cover (1) to match the large diameter end of the second insulating pad (5).

8. The sealing structure for the motor lead wire according to claim 1, characterized in that: A through hole is provided in the middle of the second insulating pad (5) to match the copper bolt (2).

9. The sealing structure for the motor lead wire according to claim 1, characterized in that: A cover cap (7) is sleeved on the outer side of the flange surface anti-loosening nut (6).

10. The sealing structure for the motor lead wire according to claim 1, characterized in that: The number of flange face lock nuts (6) is 2.

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