Flat brushless motor structure

Abstract

The utility model relates to the technical field of brushless motors, and discloses a flat brushless motor structure, comprising a front cover, the left end of which is provided with a rear cover; a stator core; a front reel; a rear reel; a plurality of stator windings, wherein the stator windings are sleeved outside the two adjacent butt joint holes; the rotor iron core is arranged at the central position of the stator iron core; a plurality of magnets; the two balance blocks are respectively arranged on the left side and the right side of the rotor iron core; an axis; the two bearings are both mounted at the outer part of the axle center; a plurality of glue filling holes are formed in the balance block, so that balance glue is not higher than the end face of the balance block and cannot be thrown away during high-speed operation; the bearing is hidden in the groove of the balance block, so that the total axial height of the motor is greatly reduced structurally, the end faces of the front cover and the rear cover can be of a pure flat structure, and more possibilities and design space are provided for the whole machine design using the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motors, in particular to a flat brushless motor structure. Background Art

[0002] Compared with traditional brushed motors, brushless motors have many advantages. First, since the friction between the brush and the commutator is eliminated, the brushless motor has a longer life and lower maintenance costs. Second, the brushless motor has a faster speed and higher efficiency, which can better meet the needs of high-speed and high-precision applications. In addition, the brushless motor has lower noise and runs more smoothly, which is suitable for occasions that are sensitive to noise and vibration, and has been widely used in many fields.

[0003] As shown in a flat rare earth permanent magnet brushless DC motor disclosed in a Chinese patent (authorization publication number CN100426636C), the rotor part of the existing brushless motor is equipped with a balancing block, and most of the balancing blocks are solid structures, so the bearings are installed outside the balancing blocks. Therefore, the bearing chamber position of the motor end cover is designed with a boss that protrudes from the outer plane of the end cover, which increases the axial size of the motor. When designing the whole machine, the customer will be limited by these two bosses, and the whole machine product cannot be designed to be low, and the effect of lowering the center of gravity and being more stable cannot be achieved. Utility Model Content

[0004] The purpose of the utility model is to provide a flat brushless motor structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A flat brushless motor structure, comprising:

[0007] A front cover, a rear cover is installed at the left end of the front cover, and a bolt is movably penetrated and connected at the outer edge of the rear cover;

[0008] A stator core, wherein the stator core is installed inside the front cover and the rear cover, and a plurality of docking holes are provided at the outer edges of the stator core;

[0009] A front winding frame, the front winding frame is installed on the right side of the stator core, and a plurality of front docking blocks are installed on the left surface of the front winding frame;

[0010] A rear winding frame, the rear winding frame is installed on the left side of the stator core, and a plurality of rear docking blocks are installed on the right side surface of the rear winding frame;

[0011] A plurality of stator windings, wherein the stator windings are sleeved outside two adjacent butt holes;

[0012] A rotor core, the rotor core is installed at the center of the stator core, and a plurality of first connection holes are opened at the outer edge of the rotor core, and a second connection hole is opened at the outer edge of the rotor core between two adjacent first connection holes;

[0013] A plurality of magnets, wherein the magnets are installed inside the first connecting hole;

[0014] Two balancing blocks, the two balancing blocks are respectively installed on the left and right sides of the rotor core;

[0015] An axis, wherein the axis is installed at the center of the rotor core;

[0016] Two bearings, both of which are mounted outside the shaft center;

[0017] A plurality of connection blocks are installed on a surface of the balancing block close to the rotor core, a plurality of glue filling holes are opened at the outer edge of the balancing block, and a groove is opened on a surface of the balancing block away from the rotor core.

[0018] As a further solution of the utility model: the right end of the bolt is threadedly connected to the inside of the front cover.

[0019] As a further solution of the utility model: the number of the front docking blocks, docking holes, rear docking blocks and stator windings is the same, the front docking blocks and the rear docking blocks are both installed inside the docking holes, and the stator winding is sleeved on the outside of two adjacent front docking blocks and two adjacent rear docking blocks.

[0020] As a further solution of the present invention: the number of the first connecting holes and the number of magnets are equal.

[0021] As a further solution of the utility model: the number of the connecting blocks and the second connecting holes is equal, and the connecting blocks are installed inside the second connecting holes.

[0022] As a further solution of the utility model: the axis passes through the front cover and the rear cover, and the bearing is located in the groove.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model provides a plurality of glue-filling holes inside the balancing block so that the balancing glue does not protrude above the end face of the balancing block and will not be thrown off during high-speed operation; the bearing is hidden in the groove of the balancing block, thus greatly reducing the total axial height of the motor in terms of structure, and the end faces of the front cover and the rear cover can be made into a purely flat structure, which provides more possibilities and design space for the design of the whole machine using this motor, so that the whole machine product can be designed to be low, achieving the effect of a lower and more stable center of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a cross-sectional view of a flat brushless motor structure;

[0026] Figure 2 An exploded diagram of a flat brushless motor structure;

[0027] Figure 3 for Figure 2 A magnified view of middle;

[0028] Figure 4 It is a schematic diagram of the structure of a balancing block in a flat brushless motor structure.

[0029] In the figure: 1, axis; 2, front cover; 3, front winding frame; 301, front docking block; 4, stator core; 401, docking hole; 5, rear winding frame; 501, rear docking block; 6, stator winding; 7, rotor core; 701, first connecting hole; 702, second connecting hole; 8, magnet; 9, balance block; 901, connecting block; 902, glue filling hole; 903, groove; 10, rear cover; 11, bearing; 12, bolt. DETAILED DESCRIPTION

[0030] See also Figures 1 to 4 In an embodiment of the utility model, a flat brushless motor structure includes:

[0031] A front cover 2, a rear cover 10 is installed at the left end of the front cover 2, a bolt 12 is movably connected through the outer edge of the rear cover 10, and the right end of the bolt 12 is threadedly connected to the inside of the front cover 2;

[0032] The stator core 4 is installed inside the front cover 2 and the rear cover 10, and a plurality of docking holes 401 are provided at the outer edges of the stator core 4;

[0033] The front winding frame 3 is installed on the right side of the stator core 4, and a plurality of front docking blocks 301 are installed on the left surface of the front winding frame 3, and the right side of the front winding frame 3 is connected to the front cover 2;

[0034] The rear winding frame 5 is installed on the left side of the stator core 4, and a plurality of rear docking blocks 501 are installed on the right surface of the rear winding frame 5, and the front docking block 301 and the rear docking block 501 are both installed inside the docking hole 401; the left side of the rear winding frame 5 is connected to the rear cover 10;

[0035] A plurality of stator windings 6, the stator windings 6 are sleeved on the outside of two adjacent docking holes 401, the number of the front docking block 301, the docking holes 401, the rear docking block 501 and the stator windings 6 is the same, and the stator windings 6 are sleeved on the outside of two adjacent front docking blocks 301 and two adjacent rear docking blocks 501;

[0036] The rotor core 7 is installed at the center of the stator core 4, and a plurality of first connection holes 701 are opened at the outer edge of the rotor core 7, and a second connection hole 702 is opened at the outer edge of the rotor core 7 between two adjacent first connection holes 701;

[0037] A plurality of magnets 8, the magnets 8 are installed inside the first connection holes 701, and the number of the first connection holes 701 and the number of the magnets 8 are equal;

[0038] Two balancing blocks 9, which are respectively installed on the left and right sides of the rotor core 7, and the balancing blocks 9 and the rotor core 7 are relatively stationary;

[0039] The shaft 1 is installed at the center of the rotor core 7. The shaft 1 and the rotor core 7 are relatively stationary. The shaft 1 passes through the front cover 2 and the rear cover 10.

[0040] Two bearings 11 are installed outside the shaft center 1, and the shaft center 1 and the bearings 11 are relatively rotatable.

[0041] A plurality of connection blocks 901 are installed on the surface of the side of the balancing block 9 close to the rotor core 7. The number of the connection blocks 901 and the second connection holes 702 is equal, and the connection blocks 901 are installed inside the second connection holes 702. A plurality of glue filling holes 902 are opened at the outer edge of the balancing block 9. A groove 903 is opened on the surface of the side of the balancing block 9 away from the rotor core 7, and the bearing 11 is located in the groove 903.

[0042] The glue filling hole 902 is used to fill the balancing glue, and the filled balancing glue does not exceed the end surface of the balancing block 9, so it will not be thrown off during high-speed operation;

[0043] A part of the bearing 11 is located in the groove 903, and the other part is connected to the front cover 2 or the rear cover 10. This greatly reduces the total axial height of the motor in terms of structure. The end faces of the front cover 2 and the rear cover 10 can be made into a flat structure, which provides more possibilities and design space for the overall design of the motor.

[0044] The working principle of the utility model is: when current passes through the stator winding 6, according to the principle of electromagnetic induction, a magnetic field is generated around the stator core 4, and this magnetic field interacts with the magnet 8 in the rotor core 7 to generate a torque, which drives the rotor core 7 to start rotating; as the rotor core 7 rotates, the electronic commutator accurately controls the direction of the current in the stator winding 6, so that the stator magnetic field always maintains an appropriate angle with the rotor, thereby continuously driving the rotor to rotate.

[0045] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flat brushless motor structure, comprising: A front cover (2), a rear cover (10) being mounted on the left end of the front cover (2), and a bolt (12) being movably penetrated and connected at the outer edge of the rear cover (10); A stator core (4), the stator core (4) being installed inside the front cover (2) and the rear cover (10), and a plurality of docking holes (401) are provided at the outer edges of the stator core (4); A front winding frame (3), the front winding frame (3) being mounted on the right side of the stator core (4), and a plurality of front docking blocks (301) being mounted on the left side surface of the front winding frame (3); A rear winding frame (5), the rear winding frame (5) being mounted on the left side of the stator core (4), and a plurality of rear docking blocks (501) being mounted on the right side surface of the rear winding frame (5); A plurality of stator windings (6), wherein the stator windings (6) are sleeved on the outside of two adjacent docking holes (401); A rotor core (7), the rotor core (7) being mounted at a central position of the stator core (4), and a plurality of first connection holes (701) being provided at an outer edge of the rotor core (7), and a second connection hole (702) being provided at an outer edge of the rotor core (7) and located between two adjacent first connection holes (701); a plurality of magnets (8), wherein the magnets (8) are installed inside the first connection hole (701); Two balancing blocks (9), the two balancing blocks (9) being respectively mounted on the left and right sides of the rotor core (7); An axis (1), wherein the axis (1) is installed at the center of the rotor core (7); Two bearings (11), both bearings (11) are mounted outside the shaft (1); The invention is characterized in that a plurality of connection blocks (901) are installed on a surface of a side of the balancing block (9) close to the rotor core (7), a plurality of glue filling holes (902) are provided at an outer edge of the balancing block (9), and a groove (903) is provided on a surface of a side of the balancing block (9) away from the rotor core (7).

2. A flat brushless motor structure according to claim 1, characterized in that: The right end of the bolt (12) is threadedly connected to the interior of the front cover (2).

3. A flat brushless motor structure according to claim 1, characterized in that: The number of the front docking blocks (301), the docking holes (401), the rear docking blocks (501) and the stator windings (6) is the same; the front docking blocks (301) and the rear docking blocks (501) are both installed inside the docking holes (401); and the stator windings (6) are sleeved on the outside of two adjacent front docking blocks (301) and two adjacent rear docking blocks (501).

4. A flat brushless motor structure according to claim 1, characterized in that: The number of the first connection holes (701) and the number of the magnets (8) are equal.

5. A flat brushless motor structure according to claim 1, characterized in that: The number of the connection blocks (901) and the second connection holes (702) is equal, and the connection blocks (901) are installed inside the second connection holes (702).

6. A flat brushless motor structure according to claim 1, characterized in that: The axis (1) passes through the front cover (2) and the rear cover (10), and the bearing (11) is located in the groove (903).

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