A brushless motor for wet and dry use

Abstract

The present invention relates to the technical field of brushless motors, specifically to a wet and dry dual-purpose brushless motor, comprising a brushless motor body, a housing provided on the brushless motor body, and a first fixed end plate and a second fixed end plate respectively mounted on both ends of the housing, a threading hole seat provided on one side of the first fixed end plate, and a cable passing through the threading hole seat, a cable positioning seat rotatably mounted on the threading hole seat, and movable fastening plates symmetrically arranged in the cable positioning seat, a positioning clamp rod and a movable clamp rod symmetrically arranged between the movable fastening plates, and the cable is clamped between the positioning clamp rod and the movable clamp rod, and a protective cover is mounted on the other end of the second fixed end plate. The wet and dry dual-purpose brushless motor is provided with a protective structure and a sealing structure at the cable position, which can avoid the problem of insufficient sealing at the cable threading position, and at the same time, a protective cover and a moisture-absorbing pad are provided at the rotating shaft position, which can effectively reduce the influence of moisture on the use of the brushless motor and effectively extend the service life of the brushless motor.

Description

Technical Field

[0001] The invention relates to the technical field of brushless motors, in particular to a wet and dry dual-purpose brushless motor. Background Art

[0002] The brushless DC motor consists of a motor body and a driver, and is a typical mechatronics product. The main feature of a brushless motor is that it has no physical brushes and commutators, but instead uses an electronic controller to drive the motor windings to achieve rotation, overcoming some of the limitations of brushed motors, and has the characteristics of high efficiency, long life, easy maintenance, high controllability, and low noise.

[0003] Existing brushless motors can be used in both dry and wet conditions. When the brushless motor is used in a humid environment, sealing and waterproofing performance is particularly important. In addition to waterproofing improvements in materials, structural improvements are also required to prevent moisture from affecting the service life of the brushless motor. At present, brushless motors usually have fixed seats at the cable penetration site for cable waterproofing and positioning. The cables also need to be flexibly bent according to the installation position and wiring position of the brushless motor. Therefore, excessive bending of the cables will affect their service life. At the same time, the cables will become loose after being pulled, which is not conducive to sealing and waterproofing. Summary of the invention

[0004] The purpose of the present invention is to provide a wet and dry dual-purpose brushless motor to solve the problem raised in the above background technology that the cables of brushless motors on the current market need to be flexibly bent according to the installation position and wiring position of the brushless motor. Therefore, excessive bending of the cables will affect their service life. At the same time, the cables will become loose after being pulled, which is not conducive to sealing and waterproofing.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wet and dry dual-purpose brushless motor, comprising a brushless motor body, a housing is provided on the brushless motor body, and a first fixed end plate and a second fixed end plate are respectively mounted on both ends of the housing, a permanent magnet rotor and a stator winding that cooperate with each other are mounted in the housing, and a rotating shaft is fixed to one end of the permanent magnet rotor, a threading hole seat is provided on one side of the first fixed end plate, and a cable is passed through the threading hole seat, a cable positioning seat is rotatably mounted on the threading hole seat, and the cable positioning seat A movable fastening plate is symmetrically arranged inside, the cable positioning seat is a U-shaped structure, and arc-shaped limiting grooves are symmetrically opened on both sides of the cable positioning seat. A positioning clamp rod and a movable clamp rod are also symmetrically installed between the movable fastening plates, and the cable is clamped between the positioning clamp rod and the movable clamp rod, and both ends of the movable clamp rod are inserted into the limiting groove, and both ends of the positioning clamp rod are also plugged into and matched with the cable positioning seat, and the limiting groove takes the positioning clamp rod as the center of the circle, and a protective cover is clamped at the other end of the second fixed end plate, and a moisture-absorbing pad is provided between the protective cover and the second fixed end plate.

[0006] Preferably, a drainage port is fixed to the side of the protective cover by welding, and the drainage port faces the bottom of the brushless motor body.

[0007] Preferably, the protective cover and the moisture-absorbing pad are both penetrated and matched with the rotating shaft, and the middle part of the protective cover is concave inwards.

[0008] Preferably, a cable seal is tightly sleeved on the cable, and the cable seal is interference fit in the threading hole seat.

[0009] Preferably, a bearing is fastened and clamped in the middle of the second fixed end plate, and the bearing and the rotating shaft are movably interpenetrating.

[0010] Preferably, an inner sealing gasket is provided between the inner side surface of the second fixed end plate and the permanent magnet rotor, and the inner sealing gasket is also penetrated and matched with the rotating shaft.

[0011] Preferably, the movable fastening plate is rotatably plugged into both ends of the positioning clamping rod and the movable clamping rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the wet and dry dual-purpose brushless motor is provided with a protective structure and a sealing structure at the cable part, which can avoid the problem of insufficient sealing at the cable threading part. At the same time, the protective cover and the moisture-absorbing pad are provided at the shaft part, which can effectively reduce the influence of moisture on the use of the brushless motor and effectively extend the service life of the brushless motor. The wet and dry dual-purpose brushless motor is provided with a drain port at the bottom of the protective cover, so that the moisture absorbed by the moisture-absorbing pad is discharged through the drain port under the action of gravity, so that the brushless motor can reduce the influence of moisture on the shaft part when working in a humid environment, and avoid water ingress to the shaft part. The cable is positioned in multiple directions, which can avoid excessive pulling of the cable to prevent affecting the sealing of the cable threading part. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a wet and dry dual-purpose brushless motor of the present invention;

[0014] Figure 2 This is a schematic diagram of the internal structure of a wet and dry dual-purpose brushless motor of the present invention;

[0015] Figure 3 A brushless motor for wet and dry use according to the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0016] Figure 4 This is a schematic diagram of the protective cover structure of a wet and dry dual-purpose brushless motor of the present invention;

[0017] Figure 5 It is a schematic diagram of the connection structure between the cable positioning seat and the threading hole seat of a wet and dry dual-purpose brushless motor of the present invention;

[0018] Figure 6This is a front view of a cable positioning seat of a wet and dry dual-purpose brushless motor of the present invention.

[0019] In the figure: 1. brushless motor body; 2. rotating shaft; 3. protective cover; 301. drain outlet; 302. moisture-absorbing pad; 4. cable positioning seat; 401. limiting groove; 5. cable; 6. first fixed end plate; 601. threading hole seat; 7. outer shell; 8. second fixed end plate; 9. bearing; 10. permanent magnet rotor; 11. stator winding; 12. inner sealing gasket; 13. cable seal; 14. movable fastening plate; 1401. positioning clamp rod; 1402. movable clamp rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-6The present invention provides a technical solution: a dry and wet dual-purpose brushless motor, comprising a brushless motor body 1, a housing 7 is provided on the brushless motor body 1, and a first fixed end plate 6 and a second fixed end plate 8 are respectively clamped and installed at both ends of the housing 7, a bearing 9 is fastened and clamped in the middle of the second fixed end plate 8, and the bearing 9 and the rotating shaft 2 are movably penetrated, this structure enables the bearing 9 to be firmly installed through the second fixed end plate 8, and plays a role in rotation positioning of the rotating shaft 2, a permanent magnet rotor 10 and a stator winding 11 that cooperate with each other are installed in the housing 7, and one end of the permanent magnet rotor 10 is fixed with the rotating shaft 2, an inner sealing gasket 12 is provided between the inner side surface of the second fixed end plate 8 and the permanent magnet rotor 10, and the inner sealing gasket 12 and the rotating shaft 2 are also penetrated and matched, this structure can be achieved through the inner sealing gasket 12. The penetration part of the rotating shaft 2 in the second fixed end plate 8 is sealed to ensure the sealing inside the housing 7. A threading hole seat 601 is provided on one side of the first fixed end plate 6, and a cable 5 is penetrated in the threading hole seat 601. A cable seal 13 is tightly sleeved on the cable 5, and the cable seal 13 is interference fit in the threading hole seat 601. This structure allows the cable 5 to be sealed relative to the threading hole seat 601 through the cable seal 13 to ensure the sealing of the penetration part of the cable 5. A cable positioning seat 4 is rotatably connected to the threading hole seat 601. The cable positioning seat 4 is a U-shaped structure, and arc-shaped limiting grooves 401 are symmetrically provided on both sides of the cable positioning seat 4. This structure can adjust the positioning by rotating the cable positioning seat 4 relative to the threading hole seat 601. The directions of the clamp rod 1401 and the movable clamp rod 1402 allow the cable 5 to bend in different directions, and the cable 5 is positioned by limiting the bending of the cable 5 by the positioning clamp rod 1401 and the movable clamp rod 1402, and the cable 5 is prevented from being excessively pulled, thereby avoiding the loosening of the cable 5 passing through the part, thereby avoiding the insufficient sealing of the cable 5, and the cable positioning seat 4 is symmetrically provided with movable fastening plates 14, and the positioning clamp rods 1401 and the movable clamp rods 1402 are symmetrically installed between the movable fastening plates 14, and the cable 5 is clamped between the positioning clamp rod 1401 and the movable clamp rod 1402, and the movable fastening plates 14 are rotatably plugged with both ends of the positioning clamp rod 1401 and the movable clamp rod 1402. This structure enables the positioning clamp rod 1401 and the movable clamp rod 1402 to be fixed to the cable 5. The clamping rod 1402 can be rotated to avoid friction of the cable 5. The two ends of the positioning clamping rod 1401 are also plugged into the cable positioning seat 4, and the limiting groove 401 takes the positioning clamping rod 1401 as the center. This structure allows the movable fastening plate 14 to move relative to the cable positioning seat 4 under the positioning of the positioning clamping rod 1401. The two ends of the movable clamping rod 1402 are plugged into the limiting groove 401. When the movable fastening plate 14 rotates, this structure allows the movable clamping rod 1402 to be limited by the limiting groove 401 to control the movable angle of the movable fastening plate 14. After adjusting the positions of the positioning clamping rod 1401 and the movable clamping rod 1402, the cable 5 can be bent in different directions to meet the fixing requirements of the cable 5. The other end of the second fixed end plate 8 is clamped with a protective cover 3.A drain port 301 is fixed on the side of the protective cover 3 by welding, and the drain port 301 faces the bottom of the brushless motor body 1. This structure can cover the bolts used to fix the second fixed end plate 8 and the housing 7 through the protective cover 3 to prevent the bolts from being exposed to the outside, so that when the brushless motor body 1 is used in a humid environment, the corrosion of the bolts can be reduced. A moisture-absorbing pad 302 is provided between the protective cover 3 and the second fixed end plate 8. The protective cover 3 and the moisture-absorbing pad 302 are both penetrated and matched with the shaft 2, and the middle part of the protective cover 3 is concave inward. In this structure, after the protective cover 3 is subjected to moisture absorption treatment by the moisture-absorbing pad 302, the moisture can be drained away through the drain port 301 under the action of gravity. The moisture-absorbing pad 302 absorbs moisture on the shaft 2, which can reduce the moisture at the shaft 2.

[0022] Working principle: When using the wet and dry dual-purpose brushless motor, first, the brushless motor body 1 fixes the permanent magnet rotor 10 and the stator winding 11 through the outer shell 7, the first fixed end plate 6 and the second fixed end plate 8 are respectively screwed and fixed to the two ends of the outer shell 7, the inner sealing gasket 12 seals and protects the penetration part of the rotating shaft 2, the bearing 9 is used for the rotation positioning of the rotating shaft 2, the cable 5 acting on the electronic controller passes through the threading hole seat 601, the cable seal 13 seals and waterproofs the penetration part of the cable 5 and the threading hole seat 601, and the threading hole seat 601 also rotates to clamp the cable positioning seat 4, the cable positioning seat 4 clamps the cable 5 through the positioning clamp rod 1401 and the movable clamp rod 1402, and then the movable fastening plate 14 passes through the limiting groove under the positioning of the positioning clamp rod 1401. 401 can rotate the limit of the movable clamp rod 1402 to make the cable 5 bend in different directions. After the cable 5 is adjusted to the optimal position, the movable fastening plate 14 is fastened by screws to avoid excessive bending of the cable 5 and prevent the cable 5 from being pulled, so that the penetration part of the cable 5 remains sealed. After the moisture-absorbing pad 302 is inserted into the protective cover 3, the protective cover 3 is snap-fitted and installed to the outside of the second fixed end plate 8, so that the protective cover 3 protects the part used for bolt fixing, and absorbs the moisture at the rotating shaft 2 through the moisture-absorbing pad 302, and then the moisture in the protective cover 3 is discharged through the drain port 301. The drain port 301 can be used in conjunction with an external water pump to efficiently remove the moisture in the protective cover 3, thereby achieving the effect of efficient waterproofing, thereby completing a series of tasks.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wet and dry dual-purpose brushless motor, comprising a brushless motor body (1), characterized in that: The brushless motor body (1) is provided with a housing (7), and the two ends of the housing (7) are respectively clamped with a first fixed end plate (6) and a second fixed end plate (8), the housing (7) is provided with a permanent magnet rotor (10) and a stator winding (11) that cooperate with each other, and one end of the permanent magnet rotor (10) is fixed with a rotating shaft (2), one side of the first fixed end plate (6) is provided with a threading hole seat (601), and a cable (5) is passed through the threading hole seat (601), a cable positioning seat (4) is rotatably clamped on the threading hole seat (601), and a movable fastening plate (14) is symmetrically provided in the cable positioning seat (4), the cable positioning seat (4) is a U-shaped structure, and the cable positioning seat ( 4) arc-shaped limiting grooves (401) are symmetrically provided on both sides, a positioning clamp rod (1401) and a movable clamp rod (1402) are symmetrically installed between the movable fastening plates (14), and the cable (5) is clamped between the positioning clamp rod (1401) and the movable clamp rod (1402), both ends of the movable clamp rod (1402) are plugged into the limiting groove (401), and both ends of the positioning clamp rod (1401) are also plugged into and matched with the cable positioning seat (4), and the limiting groove (401) takes the positioning clamp rod (1401) as the center of the circle, and the other end of the second fixed end plate (8) is clamped with a protective cover (3), and a moisture-absorbing pad (302) is provided between the protective cover (3) and the second fixed end plate (8).

2. A wet and dry dual-purpose brushless motor according to claim 1, characterized in that: A drainage port (301) is fixed to the side of the protective cover (3) by welding, and the drainage port (301) faces the bottom of the brushless motor body (1).

3. A wet and dry dual-purpose brushless motor according to claim 1, characterized in that: The protective cover (3) and the moisture-absorbing pad (302) are both inserted and matched with the rotating shaft (2), and the middle part of the protective cover (3) is concave inwards.

4. A wet and dry dual-purpose brushless motor according to claim 1, characterized in that: The cable (5) is tightly sleeved with a cable seal (13), and the cable seal (13) is interference fit in the threading hole seat (601).

5. The wet and dry dual-purpose brushless motor according to claim 1, characterized in that: A bearing (9) is fastened and clamped in the middle of the second fixed end plate (8), and the bearing (9) and the rotating shaft (2) are movably interpenetrating.

6. The wet and dry dual-purpose brushless motor according to claim 1, characterized in that: An inner sealing gasket (12) is provided between the inner side surface of the second fixed end plate (8) and the permanent magnet rotor (10), and the inner sealing gasket (12) and the rotating shaft (2) are also interlocked and matched.

7. The wet and dry dual-purpose brushless motor according to claim 1, characterized in that: The movable fastening plate (14) is rotatably plugged into both ends of the positioning clamping rod (1401) and the movable clamping rod (1402).

Images