Brushless motor for dust collector

Abstract

The utility model discloses a brushless motor for a dust collector, which comprises a controller, a mounting bracket arranged below the controller, a framework arranged below the mounting bracket, a motor body connected with the controller, an end cover assembly arranged below the framework and an impeller assembly arranged below the end cover assembly, the motor body comprises a rotor assembly, a rotor shaft on the rotor assembly penetrates through the upper and lower surfaces of the controller, the mounting bracket and the framework and is rotatably connected with the upper and lower surfaces of the controller, the mounting bracket and the framework, the lower end of the rotor shaft is connected with the end cover assembly, and a heat dissipation mechanism is arranged on the rotor shaft and is connected with the rotor shaft; the bushing penetrates through and is connected with the upper and lower surfaces of the impeller assembly, and the upper end of the bushing is connected with the end cover assembly. The beneficial effects of the utility model are that the controller is designed in a built-in manner, the occupied space can be reduced, the arranged end cover assembly can improve the performance efficiency of the motor, and the use effect is good.

Description

Technical Field

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

[0002] A motor is a device that converts electrical energy into mechanical energy. It uses an energized coil to generate a rotating magnetic field and acts on the rotor to form a magneto-electrical rotation torque. Motors are divided into DC motors and AC motors according to the power supply used. Most motors in the power system are AC motors, which can be synchronous motors or asynchronous motors. The motor is mainly composed of a stator and a rotor. The direction of the force movement of the energized wire in the magnetic field is related to the direction of the current and the direction of the magnetic flux lines. The working principle of the motor is the effect of the magnetic field on the force of the current, which makes the motor rotate. In order to achieve heat dissipation of the motor, an external centrifugal fan is generally used in the prior art. The air intake is natural by opening an air inlet on the top. The air intake is limited, and the centrifugal fan is far away from the air inlet, which makes it easy for cold air to be lost, resulting in poor heat dissipation effect.

[0003] In view of the above situation, it is necessary to improve the existing motor structure so that it can adapt to the current needs for motor heat dissipation. Utility Model Content

[0004] The utility model aims to solve the above problems and designs a brushless motor for a vacuum cleaner.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is a brushless motor for a vacuum cleaner, comprising a controller, a mounting bracket arranged below the controller, a frame arranged below the mounting bracket, a motor body connected to the controller, an end cover assembly arranged below the frame, and an impeller assembly arranged below the end cover assembly, wherein the motor body is arranged in the frame, and the motor body comprises a rotor assembly, a rotor shaft on the rotor assembly passes through the controller, the mounting bracket, and the upper and lower surfaces of the frame and is rotatably connected thereto, the lower end of the rotor shaft is connected to the end cover assembly, a heat dissipation mechanism is provided on the rotor shaft, and the heat dissipation mechanism is connected to the rotor shaft, a bushing is provided on the impeller assembly, the bushing passes through the upper and lower surfaces of the impeller assembly and is connected thereto, and the upper end of the bushing is connected to the end cover assembly.

[0006] As a further supplement to the technical solution, the heat dissipation mechanism includes a heat dissipation fan disposed on the rotor shaft and located above the controller.

[0007] As a further supplement to the present technical solution, the heat dissipation mechanism also includes a heat sink arranged on the rotor shaft and located on the end cover assembly, the heat sink is sleeved on the rotor shaft and rotatably connected thereto, and the heat sink is arranged below the rotor assembly and located above the end cover assembly.

[0008] As a further supplement to the technical solution, the cross section of the heat sink is high in the middle and low on both sides.

[0009] As a further supplement to the present technical solution, the end cover assembly includes an end cover, a guide vane arranged in the end cover, and an iron pressure plate arranged below the end cover and located below the guide vane. The heat sink is arranged on the end cover, and the middle position of the iron pressure plate is in contact with the end cover and the guide vane. The outer side of the iron pressure plate is inclined downward, and the iron pressure plate is accommodated in the impeller assembly.

[0010] As a further supplement to the technical solution, the impeller assembly includes a plurality of impellers sleeved on a bushing, and an impeller cover arranged below the end cover and located on the outside of the impellers. The impeller cover is connected to the end cover, and there is a gap between the end of the impeller and the impeller cover.

[0011] As a further supplement to the technical solution, the end cover is hollow and has a plurality of protrusions arranged in an array inside, and the protrusions are connected and fixed to the frame.

[0012] As a further supplement to the technical solution, the upper end and the lower end of the rotor assembly are respectively provided with balancing blocks, and the balancing blocks are sleeved on the rotor shaft and connected thereto.

[0013] The beneficial effect is that the built-in design of the controller can reduce the occupied space, and the provided end cover assembly can improve the performance efficiency of the motor, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model from a first angle;

[0015] Figure 2 This is a second angle overall structural diagram of the utility model;

[0016] Figure 3 yes Figure 2 Sectional view of AA in the middle;

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

[0018] In the figure, 1. controller; 2. mounting bracket; 3. frame; 4. motor body; 41. rotor assembly; 42. rotor shaft; 5. end cover assembly; 51. end cover; 511. protrusion; 52. guide vane; 53. iron pressure plate; 6. impeller assembly; 61. impeller; 62. impeller cover; 7. heat dissipation mechanism; 71. cooling fan; 72. heat sink; 8. bushing; 9. balance block. DETAILED DESCRIPTION

[0019] In order to make the technical solution more clear to those skilled in the art, Figure 1-4The technical solution of the utility model is described in detail:

[0020] A brushless motor for a vacuum cleaner comprises a controller 1, a mounting bracket 2 arranged below the controller 1, a skeleton 3 arranged below the mounting bracket 2, a motor body 4 connected to the controller 1, an end cover assembly 5 arranged below the skeleton 3, and an impeller assembly 6 arranged below the end cover assembly 5, wherein the motor body 4 is arranged in the skeleton 3, the motor body 4 comprises a rotor assembly 41, a rotor shaft 42 on the rotor assembly 41 penetrates through the upper and lower surfaces of the controller 1, the mounting bracket 2, and the skeleton 3 and is rotatably connected thereto, the lower end of the rotor shaft 42 is connected to the end cover assembly 5, a heat dissipation mechanism 7 is provided on the rotor shaft 42, the heat dissipation mechanism 7 is connected to the rotor shaft 42, a bushing 8 is provided on the impeller assembly 6, the bushing 8 penetrates through the upper and lower surfaces of the impeller assembly 6 and is connected thereto, the upper end of the bushing 8 is connected to the end cover assembly 5, the controller 1 is designed to be built-in, replacing the existing external design, which can further reduce the occupied space, has good use effect, and good heat dissipation effect; an air inlet is provided in the middle below the impeller assembly 6, and a plurality of air inlets are provided on the outer side of the end cover assembly 5.

[0021] Among them, the heat dissipation mechanism 7 includes a heat dissipation fan 71 arranged on the rotor shaft 42 and located above the controller 1, which can dissipate heat for the controller 1. Furthermore, the heat dissipation mechanism 7 also includes a heat sink 72 arranged on the rotor shaft 42 and located on the end cover assembly 5. The heat sink 72 is sleeved on the rotor shaft 42 and rotatably connected thereto. The heat sink 72 is arranged below the rotor assembly 41 and above the end cover assembly 5. Preferably, the cross-section of the heat sink 72 is high in the middle and low on both sides. The structural design of the heat sink 72 can better guide the wind to both sides, which can further reduce noise.

[0022] The structure of the end cover assembly 5 will be described in detail below. The end cover assembly 5 includes an end cover 51, a guide vane 52 arranged in the end cover 51, an iron pressure plate 53 arranged below the end cover 51 and located below the guide vane 52, a heat sink 72 is arranged on the end cover 51, the middle position of the iron pressure plate 53 is in contact with the end cover 51 and the guide vane 52, the outer side of the iron pressure plate 53 is tilted downward, the iron pressure plate 53 is accommodated in the impeller assembly 6, and a plurality of air inlets are provided on the end cover 51; when the motor is running, air is inhaled from the air inlet, passes through the end cover 51, the iron pressure plate 53, then to the guide vane 52, and then to the air outlet to discharge air. In this process, the sound is gradually reduced, thereby better improving the performance efficiency of the motor; wherein, the end cover 51 is hollow and has a plurality of protrusions 511 arranged in an array therein, the protrusions 511 are connected and fixed to the frame 3, and the protrusions 511 can support and fix the frame 3.

[0023] Among them, the impeller assembly 6 includes a plurality of impellers 61 sleeved on the bushing 8, and an impeller cover 62 arranged below the end cover 51 and located on the outside of the impeller 61. The impeller cover 62 is connected to the end cover 51. There is a gap between the end of the impeller 61 and the impeller cover 62. The impeller cover 62 is hollow and has an air inlet in the middle of its bottom.

[0024] The upper and lower ends of the rotor assembly 41 are respectively provided with balancing blocks 9 , and the balancing blocks 9 are sleeved on the rotor shaft 42 and connected thereto.

[0025] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the utility model. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the utility model and fall within the protection scope of the utility model.

Claims

1. A brushless motor for a vacuum cleaner, characterized in that: The invention comprises a controller (1), a mounting bracket (2) arranged below the controller (1), a frame (3) arranged below the mounting bracket (2), a motor body (4) connected to the controller (1), an end cover assembly (5) arranged below the frame (3), and an impeller assembly (6) arranged below the end cover assembly (5), wherein the motor body (4) is arranged in the frame (3), the motor body (4) comprises a rotor assembly (41), a rotor shaft (42) on the rotor assembly (41) passes through the upper and lower surfaces of the controller (1), the mounting bracket (2), and the frame (3) and is rotatably connected thereto, the lower end of the rotor shaft (42) is connected to the end cover assembly (5), the rotor shaft (42) is provided with a heat dissipation mechanism (7), the heat dissipation mechanism (7) is connected to the rotor shaft (42), the impeller assembly (6) is provided with a bushing (8), the bushing (8) passes through the upper and lower surfaces of the impeller assembly (6) and is connected thereto, and the upper end of the bushing (8) is connected to the end cover assembly (5).

2. A brushless motor for a vacuum cleaner according to claim 1, characterized in that: The heat dissipation mechanism (7) comprises a heat dissipation fan (71) which is arranged on the rotor shaft (42) and located above the controller (1).

3. A brushless motor for a vacuum cleaner according to claim 2, characterized in that: The heat dissipation mechanism (7) further comprises a heat sink (72) arranged on the rotor shaft (42) and located on the end cover assembly (5); the heat sink (72) is sleeved on the rotor shaft (42) and rotatably connected thereto; the heat sink (72) is arranged below the rotor assembly (41) and located above the end cover assembly (5).

4. A brushless motor for a vacuum cleaner according to claim 3, characterized in that: The cross section of the heat sink (72) is high in the middle and low on both sides.

5. The brushless motor for a vacuum cleaner according to claim 3, characterized in that: The end cover assembly (5) comprises an end cover (51), a guide vane (52) arranged in the end cover (51), and an iron pressure plate (53) arranged below the end cover (51) and located below the guide vane (52); the heat sink (72) is arranged on the end cover (51); the middle position of the iron pressure plate (53) is in contact with the end cover (51) and the guide vane (52); the outer side of the iron pressure plate (53) is arranged to be inclined downward; and the iron pressure plate (53) is accommodated in the impeller assembly (6).

6. The brushless motor for a vacuum cleaner according to claim 1, characterized in that: The impeller assembly (6) comprises a plurality of impellers (61) sleeved on a bushing (8), and an impeller cover (62) arranged below the end cover (51) and located outside the impellers (61); the impeller cover (62) is connected to the end cover (51), and a gap is provided between the end of the impeller (61) and the impeller cover (62).

7. The brushless motor for a vacuum cleaner according to claim 5, characterized in that: The end cover (51) is hollow and has a plurality of protrusions (511) arranged in an array inside. The protrusions (511) are connected and fixed to the frame (3).

8. The brushless motor for a vacuum cleaner according to claim 1, characterized in that: The upper end and the lower end of the rotor assembly (41) are respectively provided with a balancing block (9), and the balancing block (9) is sleeved on the rotor shaft (42) and connected thereto.

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