High-protection-level three-phase brushless direct current motor

Abstract

The utility model belongs to the technical field of motors, and discloses a high-protection-grade three-phase brushless direct current motor. Comprising a motor body, a shell and a cover plate, and the outer side of the shell is provided with a wire outlet sleeve; a protective film is wound on the outer side of a coil in the motor body; a groove is formed in the inner side of the wire outlet sleeve, an air bag is connected into the groove, and an adjusting assembly is installed at one end of the wire outlet sleeve. The waterproof protective film is wound on the outer side of the coil of the brushless direct current motor, the coil is prevented from making contact with moisture in air, the coil is prevented from rusting, the air bag is additionally arranged in the wire outlet sleeve, the air cylinder, the push rod and the piston are used in cooperation, the air bag is inflated to extrude a power line, and a gap between the wire outlet sleeve and the power line is closed. Therefore, moisture and dust in the air are prevented from entering the brushless direct current motor, the reliability of the brushless direct current motor is improved, the service life of the brushless direct current motor is prolonged, and the brushless direct current motor can operate in a high-humidity dusty severe environment.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically, to a three-phase brushless DC motor with a high protection level. Background Art

[0002] There are various types of motors. Among them, brushless DC motors, also known as electronically commutated motors or synchronous DC motors, are synchronous motors that use DC power. They combine the advantages of DC motors and AC motors. They have the good adjustment performance of DC motors and the advantages of AC motors such as simple structure, no commutation sparks, reliable operation and easy maintenance. Therefore, they are very popular in the market and are widely used in automobiles, home appliances, industrial equipment and other fields.

[0003] When using a brushless DC motor, it needs to be connected to a power cord. Although a wire cover will be installed, when operating in a harsh environment with high humidity and dust, moisture and dust in the air can easily enter the interior of the brushless DC motor through the gap between the power cord and the wire cover, causing the coil to rust and affecting the service life of the brushless DC motor. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model proposes a three-phase brushless DC motor with a high protection level.

[0005] To achieve the above object, the utility model provides the following technical solution: a three-phase brushless DC motor with a high protection level, comprising a motor body, a shell is provided on the outside of the motor body, a cover is fixed to the top of the shell by bolts, and a wire sleeve is installed on the outside of the shell;

[0006] A protective film is wound around the outer side of the coil in the motor body;

[0007] A groove is provided on the inner side of the outlet sleeve, an air bag is connected inside the groove, and an adjustment component is installed at one end of the outlet sleeve.

[0008] Furthermore, the adjustment component includes an air cylinder, which is installed at one end of the outlet sleeve. A sliding hole is opened at one end of the air cylinder, a push rod is slidably installed inside the sliding hole, and a piston is installed at one end of the push rod extending into the air cylinder.

[0009] Furthermore, a fixing box is installed at one end of the air cylinder, and through holes are opened at both ends of the fixing box for sliding connection with the push rod, and the through holes are connected with the sliding hole. A clamping block is slidably installed inside the fixing box, and teeth are provided at the bottom of the clamping block, and a tooth groove meshing with the teeth is provided at the top of the push rod.

[0010] Furthermore, a connecting rod is installed on the top of the block, a connecting hole slidably connected to the connecting rod is opened on the top of the fixed box, the bottom of the fixed box and the top of the block are elastically connected through a limit spring, and the limit spring is sleeved on the outside of the connecting rod.

[0011] Furthermore, a wire hole communicating with the wire outlet sleeve is formed at one end of the shell, and a middle hole rotatably connected to the rotating shaft of the motor body is formed at the top of the cover plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects: a waterproof protective film is wrapped around the outside of the brushless DC motor coil to prevent the coil from contacting with moisture in the air and preventing the coil from rusting; an air bag is added inside the outlet sleeve, and the power cord is squeezed by the coordinated use of an air cylinder, a push rod and a piston to achieve the closure of the gap between the outlet sleeve and the power cord, thereby preventing moisture and dust in the air from entering the brushless DC motor, improving the reliability and service life of the brushless DC motor, and being able to operate in harsh environments with high humidity and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is an exploded view of the overall structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the outlet sleeve of the utility model;

[0016] Figure 4 It is a schematic diagram of the internal structure of the air cylinder and the fixing box of the utility model.

[0017] In the figure:

[0018] 1. Shell; 2. Cover plate; 3. Motor body; 4. Protective film; 5. Wire sleeve; 6. Air bag; 7. Air cylinder; 8. Push rod; 9. Piston; 10. Fixing box; 11. Block; 12. Connecting rod; 13. Limit spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4The utility model provides the following technical solutions: a three-phase brushless DC motor with a high protection level includes a motor body 3, a protective film 4 is wrapped around the outer side of the coil in the motor body 3, the protective film 4 is made of waterproof material, and the protective film 4 is wrapped around the outer side of the coil of the motor body 3 to seal the coil to prevent moisture in the air from contacting the coil and causing the coil to rust. A shell 1 is provided on the outer side of the motor body 3, and a cover plate 2 is fixed to the top of the shell 1 by bolts. Side ears that fit each other are provided on the outer sides of the shell 1 and the cover plate 2, and mounting holes that are threadedly connected to the bolts are provided in the middle of the side ears. The cover plate 2 seals the shell 1, and a wire hole that is connected to the outlet sleeve 5 is provided at one end of the shell 1. The wire hole is used to insert the power line on the motor body 3, and a middle hole that is rotatably connected to the rotating shaft of the motor body 3 is provided on the top of the cover plate 2. A sealed bearing is connected between the middle hole and the motor body 3, and the sealed bearing seals the middle hole while not affecting the rotation of the rotating shaft of the motor body 3.

[0021] An outlet sleeve 5 is installed on the outer side of the shell 1, and a groove is provided on the inner side of the outlet sleeve 5. An air bag 6 is connected to the inside of the groove. An adjustment component is installed on one end of the outlet sleeve 5. The adjustment component includes an air cylinder 7. The air cylinder 7 is installed at one end of the outlet sleeve 5. A sliding hole is opened at one end of the air cylinder 7. The other end of the air cylinder 7 is connected and conducted with the air bag 6. A push rod 8 is slidably installed inside the sliding hole. A piston 9 is installed at one end of the push rod 8 extending into the air cylinder 7. The outer side of the piston 9 is slidably connected with the inner side of the air cylinder 7. When the piston 9 slides toward the end close to the air bag 6, the gas in the air cylinder 7 enters the air bag 6 to inflate the air bag 6. When the piston 9 slides toward the end away from the air bag 6, the internal negative pressure of the air cylinder 7 is generated, and the gas in the air bag 6 enters the air cylinder 7. The air bag 6 is deflated. A fixed box 10 is also installed at the end. Both ends of the fixed box 10 are provided with through holes that are slidably connected to the push rod 8. The through holes are connected to the sliding holes, and the push rod 8 is limited to slide linearly through the through holes and the sliding holes. A card block 11 is slidably installed inside the fixed box 10. The bottom of the card block 11 is provided with teeth, and the top of the push rod 8 is provided with tooth grooves that mesh with the teeth. The friction resistance between the card block 11 and the push rod 8 is increased by the teeth and tooth grooves. A connecting rod 12 is installed on the top of the card block 11. The top of the fixed box 10 is provided with a connecting hole that is slidably connected to the connecting rod 12. The bottom of the fixed box 10 and the top of the card block 11 are elastically connected through a limit spring 13. The limit spring 13 is sleeved on the outside of the connecting rod 12, and the limit spring 13 plays a role in limiting the sliding distance of the card block 11.

[0022] Working principle: When in use, wrap the protective film 4 around the outer side of the coil of the motor body 3, then place the motor body 3 wrapped with the protective film 4 inside the shell 1, pass the power cord of the motor body 3 through the wire hole and the outlet sleeve 5 of the shell 1, so that the power cord passes through the inner side of the airbag 6, cover the cover 2 on the top of the shell 1, and make the output end of the motor body 3 pass through the middle hole on the top of the cover 2, fix the cover 2 and the shell 1 with bolts, pull the connecting rod 12 upward, the connecting rod 12 drives the card block 11 to slide upward, the card block 11 squeezes the limit spring 13, and at the same time, the teeth at the bottom of the card block 11 are out of contact with the tooth groove at the bottom of the push rod 8, the limit of the push rod 8 is released, and the push rod 8 is pushed toward the end close to the airbag 6, and the push rod 8 brings The movable piston 9 slides, and during the sliding process of the piston 9, the gas in the air cylinder 7 is pushed into the air bag 6, so that the air bag 6 expands and squeezes the power cord of the motor body 3, and the connecting rod 12 is released. The thrust of the limit spring 13 itself drives the block 11 to slide, and the teeth at the bottom of the block 11 engage with the tooth grooves at the top of the push rod 8. At this time, the push rod 8 is limited and fixed, thereby sealing the gap between the outlet sleeve 5 and the power cord to prevent moisture and dust in the air from entering the interior of the housing 1 through the gap. When it is necessary to deflate the air bag 6, the connecting rod 12 is pulled upward to release the limit of the push rod 8, and then the push rod 8 is pulled toward the end away from the air bag 6, so that the internal pressure of the air cylinder 7 is negative, and the gas in the air bag 6 enters the interior of the air cylinder 7, thereby realizing the deflation operation of the air bag 6.

[0023] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0024] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A three-phase brushless DC motor with a high protection level, comprising a motor body (3), characterized in that: A housing (1) is provided on the outside of the motor body (3); a cover plate (2) is fixed to the top of the housing (1) by bolts; and a lead-out sleeve (5) is installed on the outside of the housing (1); A protective film (4) is wound around the outer side of the coil in the motor body (3); A groove is provided on the inner side of the outlet sleeve (5), an air bag (6) is connected inside the groove, and an adjustment component is installed at one end of the outlet sleeve (5).

2. The three-phase brushless DC motor with high protection level according to claim 1 is characterized in that: The regulating assembly comprises an air cylinder (7), wherein the air cylinder (7) is mounted on one end of the outlet sleeve (5), a sliding hole is provided on one end of the air cylinder (7), a push rod (8) is slidably mounted inside the sliding hole, and a piston (9) is mounted on one end of the push rod (8) extending into the air cylinder (7).

3. The three-phase brushless DC motor with high protection level according to claim 2 is characterized in that: A fixing box (10) is also installed at one end of the air cylinder (7), and through holes slidably connected to the push rod (8) are opened at both ends of the fixing box (10), and the through holes are connected to the sliding hole. A clamping block (11) is slidably installed inside the fixing box (10), and teeth are provided at the bottom of the clamping block (11), and a tooth groove meshing with the teeth is provided at the top of the push rod (8).

4. The three-phase brushless DC motor with high protection level according to claim 3 is characterized in that: A connecting rod (12) is installed on the top of the clamping block (11), a connecting hole slidably connected to the connecting rod (12) is opened on the top of the fixing box (10), and the bottom of the fixing box (10) and the top of the clamping block (11) are elastically connected via a limit spring (13), and the limit spring (13) is sleeved on the outside of the connecting rod (12).

5. The three-phase brushless DC motor with high protection level according to claim 1, characterized in that: One end of the housing (1) is provided with a wire hole that is in communication with the lead-out sleeve (5), and the top of the cover plate (2) is provided with a middle hole that is rotatably connected to the rotating shaft of the motor body (3).

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