Direct-current brushless motor convenient for internal maintenance

Abstract

The utility model relates to the technical field of direct-current brushless motors, and discloses a direct-current brushless motor convenient for internal maintenance, which comprises a shell, the shell is composed of a lower shell and an upper shell, the upper shell is provided with a plurality of first bolts, and the first bolts are used for fixing the lower shell and the upper shell. A sealing assembly is arranged between the lower shell and the upper shell and used for enhancing the sealing performance of the connecting position of the lower shell and the upper shell, a rear end cover and a front end cover are arranged at the two ends of the shell respectively, and two fixing blocks are fixed to the circumferential side face of the rear end cover. The shell is divided into the lower shell body and the upper shell body, so that the built-in driver body and the motor rotor body which are placed in the shell are easier to disassemble and assemble, and in order to improve the sealing performance of the connecting position of the lower shell body and the upper shell body, the sealing piece and the two sealing strips which are of a cross-shaped structure are arranged; and the grooves matched with the sealing strips are formed in the lower shell and the upper shell, so that the joint of the lower shell and the upper shell is tighter.

Description

Technical Field

[0001] The utility model relates to the technical field of direct current brushless motors, and more specifically to a direct current brushless motor which is convenient for internal maintenance. Background Art

[0002] The brushless DC motor consists of an electric motor and a driver. It has the advantages of a traditional DC motor, but without the carbon brushes and slip rings. It can run at low speed and high power. It is not only small in size and light in weight, but also has the advantages of good stability, high efficiency, long life, low noise, and good speed-torque characteristics. It is widely used in industries such as automobiles, automation, aerospace, and home appliances.

[0003] When maintaining a brushless DC motor, its front and rear end covers and the outer casing need to be disassembled so that the built-in driver body and the motor rotor body can be taken out for maintenance. However, the connection between the outer casing and the built-in driver body and the motor rotor body is too compact, which makes it difficult to remove the two. It also takes a lot of time to align the positions during subsequent assembly, which not only increases the difficulty of the work, but also seriously affects the efficiency of brushless DC motor maintenance. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a brushless DC motor which is convenient for internal maintenance. By splitting the outer shell into a lower shell and an upper shell, the built-in drive machine body and the motor rotor body placed in the outer shell are easier to disassemble and assemble.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a DC brushless motor that is convenient for internal maintenance, comprising a shell, the shell being composed of a lower shell and an upper shell, the upper shell being provided with a plurality of first bolts, the plurality of first bolts being used for fixing the lower shell and the upper shell, a sealing assembly being provided between the lower shell and the upper shell, the sealing assembly being used for enhancing the sealing performance at the connection between the lower shell and the upper shell, a rear end cover and a front end cover being provided at both ends of the shell, two fixing blocks being fixed to the peripheral side surface of the rear end cover, a screw rod being provided through the fixing block, and a joint between the fixing block and the screw rod being rotatably connected through a bearing, a first gear being fixed to one end of the screw rod close to the rear end cover, a limiting plate being fixed to the other end of the screw rod, a carrier block being threadedly connected to the screw rod, the front end cover being fixedly installed between the two carrier blocks, a sealing ring being provided at the connection between the rear end cover and the shell, and at the connection between the front end cover and the shell, a rotation drive assembly being provided on the rear end cover, the rotation drive assembly being used for driving the two first gears to rotate.

[0006] As a preferred technical solution of the utility model, two support plates are fixed to the bottom of the lower shell, and a base is fixed to the bottom of the two support plates, and a plurality of mounting holes are opened on the base.

[0007] As a preferred technical solution of the utility model, a plurality of heat dissipation fins are fixed to the outer wall of the lower shell and the outer wall of the upper shell, and a handle is fixed to the top of the upper shell.

[0008] As a preferred technical solution of the utility model, the sealing assembly includes a sealing plate, sealing strips are fixed to the upper and lower sides of the sealing plate, the sealing plate and the two sealing strips are arranged in a cross shape, and grooves matching the sealing strips are provided on the lower shell and the upper shell.

[0009] As a preferred technical solution of the utility model, the rotary drive assembly includes a rotating rod, one end of which is rotatably connected to the rear end cover via a bearing, a knob is fixed to the other end of the rotating rod, a second gear is fixedly sleeved on the outside of the rotating rod, and the second gear is meshed with the two first gears.

[0010] As a preferred technical solution of the utility model, a second bolt is threadedly connected to the knob, a plurality of slots distributed in a circular array are provided on the second gear, and the second bolt is clearance-matched with the inner wall of the slot.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model makes it easier to disassemble and assemble the built-in driving machine body and the motor rotor body placed in the housing by splitting the housing into a lower housing and an upper housing. In order to improve the sealing performance of the connection between the lower housing and the upper housing, a cross-shaped sealing sheet and two sealing strips are provided, and grooves adapted to the sealing strips are provided on the lower housing and the upper housing, so that the connection between the lower housing and the upper housing is tighter.

[0013] 2. The utility model drives the rotating rod to rotate by turning the knob, and the rotating rod pulls the second gear to rotate. With the help of the second gear and the two first gears meshing with each other, the two first gears can be driven to pull the two screw rods to rotate, so that the two screw rods pull the two carrier blocks and the front end cover between the two carrier blocks to move closer to the rear end cover in a screw rod transmission manner, so as to adjust the distance between the rear end cover and the front end cover, so that the rear end cover and the front end cover can be clamped on both sides of the outer shell to complete the sealing of the built-in drive machine body and the motor rotor body. The second bolt is tightened with a wrench to insert the second bolt into the corresponding slot, so that the knob can be locked and cannot rotate, thereby ensuring the stability of the distance between the rear end cover and the front end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the lower shell, upper shell, heat dissipation fins and handle in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the rear end cover, the front end cover, the screw rod and the first gear in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the sealing component in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the rotary drive assembly in the utility model.

[0019] In the figure: 1. lower shell; 2. upper shell; 3. first bolt; 4. rear end cover; 5. front end cover; 6. fixing block; 7. screw rod; 8. limit plate; 9. first gear; 10. carrier block; 11. sealing ring; 12. support plate; 13. base; 14. mounting hole; 15. cooling fin; 16. handle; 17. sealing sheet; 18. sealing strip; 19. groove; 20. rotating rod; 21. knob; 22. second gear; 23. second bolt; 24. slot. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figures 1 to 5As shown, the utility model provides a DC brushless motor which is convenient for internal maintenance, including a shell, wherein a built-in driving machine body and a motor rotor body are loaded inside the shell, and the motor rotor body is driven to rotate by the built-in driving machine body, so that the motor rotor body can cut the magnetic flux lines, thereby realizing the rotation of the motor rotor body, the shell is composed of a lower shell 1 and an upper shell 2, a plurality of first bolts 3 are arranged on the upper shell 2, and the plurality of first bolts 3 are used for fixing the lower shell 1 and the upper shell 2, a sealing assembly is arranged between the lower shell 1 and the upper shell 2, and the sealing assembly is used to enhance the sealing of the connection between the lower shell 1 and the upper shell 2, a rear end cover 4 and a front end cover 5 are respectively arranged at both ends of the shell, and two fixing blocks 6 are fixed to the peripheral side of the rear end cover 4, a screw rod 7 is penetrated through the fixing block 6, and the fixing block 6 and the screw rod 7 are connected. The joint is rotatably connected by a bearing, a first gear 9 is fixed to one end of the screw rod 7 close to the rear end cover 4, a limit plate 8 is fixed to the other end of the screw rod 7, a carrier block 10 is threadedly connected to the screw rod 7, the front end cover 5 is fixedly installed between the two carrier blocks 10, a sealing ring 11 is provided at the connection between the rear end cover 4 and the outer shell, and at the connection between the front end cover 5 and the outer shell, a rotary drive assembly is provided on the rear end cover 4, and the rotary drive assembly is used to drive the two first gears 9 to rotate, two support plates 12 are fixed to the bottom of the lower shell 1, a base 13 is fixed to the bottom of the two support plates 12, a plurality of mounting holes 14 are provided on the base 13, and a sealing assembly includes a sealing sheet 17, sealing strips 18 are fixed to the upper and lower sides of the sealing sheet 17, the sealing sheet 17 and the two sealing strips 18 are arranged in a cross shape, and grooves 19 matching the sealing strips 18 are provided on the lower shell 1 and the upper shell 2.

[0022] The outer shell is split into a lower shell 1 and an upper shell 2, so that the built-in drive machine body and the motor rotor body placed in the outer shell are easier to disassemble and assemble. In order to improve the sealing performance of the connection between the lower shell 1 and the upper shell 2, a cross-shaped sealing sheet 17 and two sealing strips 18 are provided, and grooves 19 adapted to the sealing strips 18 are opened on the lower shell 1 and the upper shell 2, so that the connection between the lower shell 1 and the upper shell 2 is tighter.

[0023] A plurality of heat dissipation fins 15 are fixed to the outer wall of the lower shell 1 and the outer wall of the upper shell 2 , and a handle 16 is fixed to the top of the upper shell 2 .

[0024] With the help of multiple heat dissipation fins 15, the contact area between the shell and the air can be increased, making it easier to dissipate the heat generated by the built-in drive machine body and the motor rotor body placed inside the shell during operation. The setting of the handle 16 makes it easier to take the upper shell 2 and the lower shell 1 after being disassembled.

[0025] Among them, the rotation drive assembly includes a rotating rod 20, one end of which is rotatably connected to the rear end cover 4 through a bearing, and a knob 21 is fixed to the other end of the rotating rod 20. A second gear 22 is fixedly sleeved on the outside of the rotating rod 20, and the second gear 22 is meshed with the two first gears 9. A second bolt 23 is threadedly connected to the knob 21, and a plurality of slots 24 distributed in a circular array are provided on the second gear 22, and the second bolt 23 is clearance-matched with the inner wall of the slot 24.

[0026] The second gear 22 is engaged with the second gear 22 and the second gear 22 is engaged with the first gear 9, so that the two first gears 9 can be engaged with the two screw rods 7 to rotate, so that the two screw rods 7 can pull the two carrier blocks 10 and the front end cover 5 between the two carrier blocks 10 to move closer to the rear end cover 4 in a screw transmission manner, so as to adjust the distance between the rear end cover 4 and the front end cover 5, so that the rear end cover 4 and the front end cover 5 can be clamped on both sides of the outer shell to complete the sealing of the built-in drive machine body and the motor rotor body, and the second bolt 23 is tightened with a wrench so that the second bolt 23 is inserted into the corresponding slot 24, so that the knob 21 can be locked from rotating, thereby ensuring the stability of the distance between the rear end cover 4 and the front end cover 5.

[0027] The working principle and use process of this utility model:

[0028] When in use, the knob 21 can be reversed, so that the knob 21 can drive the second gear 22 to rotate counterclockwise with the help of the rotating rod 20, and the second gear 22 can mesh with the two first gears 9 to drive the two first gears 9 to rotate, and the two first gears 9 can drive the two screw rods 7 to rotate, so that the two screw rods 7 drive the two carrier blocks 10 to drive the front end cover 5 away from the rear end cover 4 in a screw rod transmission manner, so that the distance between the rear end cover 4 and the front end cover 5 can be expanded, so that the rear end cover 4 and the front end cover 5 can be removed from the housing;

[0029] Use a wrench to remove the first bolt 3 so that the lower shell 1 and the upper shell 2 can be separated. After removing the upper shell 2, the built-in drive machine body and the motor rotor body placed on the lower shell 1 are removed for maintenance. After the maintenance is completed, they are installed on the lower shell 1 again, and the upper shell 2 is taken out to cover the lower shell 1, and a sealing assembly is placed between the two, so that the cross-shaped sealing sheet 17 and the two sealing strips 18 enhance the sealing of the connection between the two. Use the first bolt 3 to lock the lower shell 1 and the upper shell 2 again, and then rotate the knob 21 forward so that the rear end cover 4 and the front end cover 5 are close to each other under the drive of the screw rod, so that the rear end cover 4 and the front end cover 5 complete the blocking of the two ends of the shell, and finally, use a wrench to tighten the second bolt 23 so that the second bolt 23 is inserted into the corresponding slot 24, so that the knob 21 can be locked from rotating, thereby ensuring the stability of the distance between the rear end cover 4 and the front end cover 5.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brushless DC motor that is convenient for internal maintenance, comprising a housing, characterized in that: The housing is composed of a lower housing (1) and an upper housing (2); a plurality of first bolts (3) are provided on the upper housing (2); the plurality of first bolts (3) are used to fix the lower housing (1) and the upper housing (2); a sealing assembly is provided between the lower housing (1) and the upper housing (2); the sealing assembly is used to enhance the sealing performance of the connection between the lower housing (1) and the upper housing (2); a rear end cover (4) and a front end cover (5) are provided at both ends of the housing, two fixing blocks (6) are fixed to the peripheral side surface of the rear end cover (4); a screw rod (7) is provided through the fixing block (6), and the fixing block (6) is fixed with a screw rod (7) and a screw rod (7) is provided through the fixing block (6). The fixed block (6) and the screw rod (7) are rotatably connected at a joint via a bearing; a first gear (9) is fixed to one end of the screw rod (7) close to the rear end cover (4); a limit plate (8) is fixed to the other end of the screw rod (7); a carrier block (10) is threadedly connected to the screw rod (7); the front end cover (5) is fixedly installed between the two carrier blocks (10); sealing rings (11) are provided at the connection between the rear end cover (4) and the housing and at the connection between the front end cover (5) and the housing; a rotation drive assembly is provided on the rear end cover (4); the rotation drive assembly is used to drive the two first gears (9) to rotate.

2. A brushless DC motor that is convenient for internal maintenance according to claim 1, characterized in that: Two support plates (12) are fixed to the bottom of the lower shell (1), a base (13) is fixed to the bottom of the two support plates (12), and a plurality of mounting holes (14) are provided on the base (13).

3. A brushless DC motor that is convenient for internal maintenance according to claim 1, characterized in that: A plurality of heat dissipation fins (15) are fixed to the outer wall of the lower shell (1) and the outer wall of the upper shell (2), and a handle (16) is fixed to the top of the upper shell (2).

4. A brushless DC motor that is convenient for internal maintenance according to claim 1, characterized in that: The sealing assembly comprises a sealing sheet (17), sealing strips (18) are fixed to the upper and lower sides of the sealing sheet (17), the sealing sheet (17) and the two sealing strips (18) are arranged in a cross shape, and grooves (19) matching the sealing strips (18) are provided on the lower shell (1) and the upper shell (2).

5. A brushless DC motor that is convenient for internal maintenance according to claim 1, characterized in that: The rotary drive assembly comprises a rotating rod (20), one end of the rotating rod (20) being rotatably connected to the rear end cover (4) via a bearing, a knob (21) being fixed to the other end of the rotating rod (20), a second gear (22) being fixedly sleeved on the outside of the rotating rod (20), and the second gear (22) and the two first gears (9) being meshed with each other.

6. A brushless DC motor that is convenient for internal maintenance according to claim 5, characterized in that: The knob (21) is threadedly connected with a second bolt (23), the second gear (22) is provided with a plurality of slots (24) distributed in a circular array, and the second bolt (23) is clearance-matched with the inner wall of the slot (24).

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