Bolt protection structure of explosion-proof motor

Abstract

The utility model discloses a kind of explosion-proof motor bolt protection structures, including motor base, end cover and fastening bolt, end cover is fixed in motor base by fastening bolt, bolt tail is exposed to motor outside and is equipped with threaded plastic protective sleeve, threaded plastic protective sleeve is built-in magnetic steel, with bolt tail adsorption fixed, inner layer is equipped with magnetism cover and enhances adsorption, while fixed ring is inserted into protective sleeve ring groove to prevent falling, nylon barb can block dust and moisture, magnetic steel and bolt are equipped with thin baffle and prevent abrasion.In addition, threaded plastic protective sleeve is provided with glue injection hole, which is sealed by rivet, and can be injected with sealant to strengthen protection. The protection structure can effectively prevent the fastening bolt from being eroded and collided by the external environment, ensuring the safe and reliable operation of the explosion-proof motor, and improving the stability and service life of the equipment.

Description

Technical Field

[0001] This utility model relates to the industrial and mining fields, specifically a sealing device for motor connectors. Background Technology

[0002] At coal mine excavation sites, the environment is harsh, with coal ash and sludge everywhere. Large pieces of falling coal ore can easily damage motors. When the motor is stopped for maintenance, it is found that coal ash, sludge, and other debris are adsorbed into the gaps on the motor surface, and the motor surface may also be damaged by falling ore. The mounting bolts are installed outside the explosion-proof cavity. The leakage of debris and the damage from falling ore make it time-consuming and laborious to disassemble the bolts, and damage the mounting bolt holes of the base, making maintenance extremely inconvenient. Utility Model Content

[0003] To address the aforementioned problems, this utility model discloses an explosion-proof motor bolt protection structure.

[0004] The specific technical solution is as follows:

[0005] An explosion-proof motor bolt protection structure includes a motor base, an end cover, and a fastening bolt. The end cover is fixed to the motor base by the fastening bolt, and the tail of the fastening bolt is exposed outside the motor. The exposed part is fitted with a threaded plastic protective sleeve. A magnet is fixedly installed inside the threaded plastic protective sleeve, and the magnet is attracted and fixed to the tail of the fastening bolt. A magnetic attracting cover is provided inside the threaded plastic protective sleeve, covering the outer circumference of the magnet. A fixing ring is fitted at the tail of the fastening bolt, and the outer circle of the fixing ring fits into the annular groove of the threaded plastic protective sleeve. Nylon barbs are provided inside the threaded plastic protective sleeve at the position corresponding to the fastening bolt.

[0006] After the fastening bolt passes through the light hole of the end cover and is screwed into the mounting through hole of the motor base, its tail protrudes with a thread length of 2 to 3 turns.

[0007] The fastening bolts are equipped with flat washers and elastic washers during installation.

[0008] The magnet is fixed to the inner cavity of the threaded plastic protective sleeve by adhesive.

[0009] A thin baffle is provided between the magnet and the tail of the fastening bolt, with both ends of the thin baffle abutting against the fastening bolt and the magnet.

[0010] The threaded plastic protective sleeve has an injection hole, and a rivet for sealing is provided in the injection hole.

[0011] The advantages of this utility model are: the protective structure integrates magnetic positioning and barbed snap-fit ​​anti-loosening, realizing the bolt protective sleeve's instant installation and zero detachment under strong vibration; it blocks electrochemical corrosion, and the fully sealed design completely isolates the intrusion of coal slurry moisture, significantly extending the bolt's life; it has the advantages of tool-free maintenance and low cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0013] 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.

[0014] An explosion-proof motor bolt protection structure includes a motor base 1, an end cap 2, and a fastening bolt 3. The end cap 2 is fixed to the motor base 1 by the fastening bolt 3. The tail of the fastening bolt 3 is exposed outside the motor, and the exposed part is fitted with a threaded plastic protective sleeve 8. A magnet 7 is fixedly installed inside the threaded plastic protective sleeve 8, and the magnet 7 is attracted and fixed to the tail of the fastening bolt 3. A magnetic attracting cover 81 is provided inside the threaded plastic protective sleeve 8, covering the outer circumference of the magnet 7. A fixing ring 10 is fitted at the tail of the fastening bolt 3, and the outer circle of the fixing ring 10 is fitted into the annular groove of the threaded plastic protective sleeve 8. Nylon barbs 11 are provided inside the threaded plastic protective sleeve 8 at the position corresponding to the fastening bolt 3.

[0015] After the fastening bolt 3 passes through the light hole of the end cover 2 and is screwed into the mounting through hole of the motor base 1, its tail protrudes with a thread length of 2 to 3 turns.

[0016] The fastening bolt 3 is equipped with a flat washer 4 and an elastic washer 5 during installation.

[0017] The magnet 7 is fixed to the inner cavity of the threaded plastic protective sleeve 8 by adhesive.

[0018] A thin baffle 6 is provided between the magnet 7 and the tail of the fastening bolt 3, and the two ends of the thin baffle 6 abut against the fastening bolt 3 and the magnet 7.

[0019] The threaded plastic protective sleeve 8 has an injection hole, and a rivet 9 for sealing is provided in the injection hole.

[0020] The working principle of this utility model is as follows: When the end cover 2 is fixed to the motor base 1 by the fastening bolt 3, the tail of the fastening bolt 3 will protrude 2-3 threads and be exposed outside the motor. At this time, the threaded plastic protective sleeve 8 fitted at the tail is attracted and fixed to the fastening bolt 3 by the internal magnet 7, and the magnetic cover 81 can enhance the attraction effect of the magnet 7. At the same time, the fixing ring 10 is stuck in the annular groove of the threaded plastic protective sleeve 8 to further prevent the protective sleeve from falling off. The nylon barbs 11 can prevent dust and moisture from entering. During installation, the flat washer 4 and the elastic washer 5 can ensure the stability of the bolt connection. The thin baffle 6 can prevent the magnet 7 from directly contacting the bolt and being damaged. If further sealing is required, sealant can be injected through the injection hole and then sealed with rivets 9. This structure can effectively protect the tail of the fastening bolt 3 from corrosion and collision by the external environment, thereby ensuring the safety and reliability of the explosion-proof motor.

Claims

1. A bolt protection structure for an explosion-proof motor, comprising a motor base (1), an end cover (2), and fastening bolts (3), wherein the end cover (2) is fixed to the motor base (1) by the fastening bolts (3), characterized in that: The tail of the fastening bolt (3) is exposed outside the motor, and the exposed part is fitted with a threaded plastic protective sleeve (8); a magnet (7) is fixedly installed inside the threaded plastic protective sleeve (8), and the magnet (7) is attracted and fixed to the tail of the fastening bolt (3); a magnetizing cover (81) is provided inside the threaded plastic protective sleeve (8), and the magnetizing cover (81) covers the outer circumference of the magnet (7); a fixing ring (10) is fitted at the tail of the fastening bolt (3), and the outer circle of the fixing ring (10) is fitted into the annular groove of the threaded plastic protective sleeve (8); nylon barbs (11) are provided inside the threaded plastic protective sleeve (8) at the position corresponding to the fastening bolt (3).

2. The explosion-proof motor bolt protection structure according to claim 1, characterized in that: After the fastening bolt (3) passes through the light hole of the end cover (2) and is screwed into the mounting through hole of the motor base (1), its tail protrudes with a thread length of 2 to 3 turns.

3. The explosion-proof motor bolt protection structure according to claim 1, characterized in that: The fastening bolt (3) is equipped with a flat washer (4) and an elastic washer (5) during installation.

4. The explosion-proof motor bolt protection structure according to claim 1, characterized in that: The magnet (7) is fixed to the inner cavity of the threaded plastic protective sleeve (8) by adhesive.

5. The explosion-proof motor bolt protection structure according to claim 1, characterized in that: A thin baffle (6) is provided between the magnet (7) and the tail of the fastening bolt (3), and the two ends of the thin baffle (6) abut against the fastening bolt (3) and the magnet (7).

6. The explosion-proof motor bolt protection structure according to claim 1, characterized in that: The threaded plastic protective sleeve (8) has an injection hole, and a rivet (9) for sealing is provided in the injection hole.

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