Brushless suction motor

Abstract

The utility model discloses a brushless suction motor, which comprises a shell assembly, a bearing assembly, a stator assembly and a rotor assembly, the rotor assembly is arranged in the shell assembly, the stator assembly is arranged on the outer side of the rotor assembly, the rotor assembly comprises a rotating shaft, the bearing assembly is sleeved on the rotating shaft, and the bearing assembly is sleeved on the rotating shaft. Comprising a first bearing, a second bearing and a third bearing and is provided with a bearing chamber used for containing and positioning the bearing assembly. The beneficial effects of the utility model are that the bearing chamber is arranged to position the rotating shaft, thereby facilitating the installation of the whole motor, reducing the installation time, improving the noise, and prolonging the service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, specifically relates to a kind of brushless suction motor. BACKGROUND

[0002] The conventional brushless suction motor on market is mostly double-bearing and positioned by shell and support, too many positions exist, and assembly is too cumbersome, which leads to too many factors affecting motor life and performance. Compared with conventional motor, brushless suction motor has the advantages of long life, high efficiency, etc. The conventional double-bearing positioning structure, for example, because the bearing needs double fixation by shell and support, the concentricity is greatly affected, the precision is low, and the rotor part needs to be balanced first, then pressed into the bearing, the process is more cumbersome, too many parts, and the air path is not smooth. For example, the invention patent with application number 201220663373.3 discloses a brushless motor, which includes two bearings for fixing the rotating shaft. During installation, the bearings on both sides are positioned, which is cumbersome, time-consuming and labor-intensive. SUMMARY

[0003] To solve the above technical problems, the utility model provides a kind of brushless suction motor, and it is convenient to assemble, has the advantages of prolonging motor life, increasing pre-tightening force, improving noise and tail sound, etc.

[0004] Specifically, the utility model discloses a kind of brushless suction motor, including: shell assembly, bearing assembly, stator assembly and rotor assembly, the rotor assembly is arranged in the shell assembly, the stator assembly is arranged on the outside of the rotor assembly, the rotor assembly includes rotating shaft, the bearing assembly is set on the rotating shaft, including first bearing, second bearing and third bearing, the shell assembly is provided with the bearing chamber for accommodating and positioning the bearing assembly.

[0005] The beneficial effects of the above technical solution are that the rotating shaft is positioned by the bearing chamber, which facilitates the installation of the entire motor, reduces the installation time, and improves the noise and prolongs the service life.

[0006] Further, the first bearing is located on the upper side, the second bearing and the third bearing are arranged side by side at the lower end of the rotating shaft, and a spring is arranged between the first bearing and the second bearing.

[0007] The beneficial effects of the above technical solution are that the three bearings arranged in the upper and lower positions not only facilitate assembly, but also effectively prevent the rotating shaft from shaking during rotation, effectively prolong the service life, the spring applies pre-tightening force to the bearing, improves the axial and radial positioning accuracy and the rigidity of the bearing, and prevents abnormal noise of the bearing caused by vibration or resonance during work.

[0008] Further, the rotor assembly further comprises: a magnet, sleeved on the rotating shaft and located on the upper side of the bearing assembly, and a balance ring is arranged on the upper side of the magnet.

[0009] The beneficial effects of the above technical scheme are that the magnet is arranged to cooperate with the stator assembly to realize the rotation of the rotating shaft, and the balance ring is arranged to limit the position of the magnet.

[0010] Further, the bottom of the bearing chamber is provided with a receiving and positioning surface, and the third bearing is in contact with the receiving and positioning surface.

[0011] The beneficial effects of the above technical scheme are that the bearing chamber is arranged to fix the three bearings, facilitating installation and ensuring that the bearing assembly is installed in place.

[0012] Further, the lower side of the shell assembly is provided with a fan assembly, which comprises a fan cover, a movable impeller and a fixed impeller, the fixed impeller is fixed in the shell assembly, the movable impeller is connected with the rotating shaft, and the fan cover is connected with the shell assembly.

[0013] The beneficial effects of the above technical scheme are that the fan assembly is arranged to blow air, which can reduce the temperature of the motor during operation and effectively prolong the service life, and the fan cover can effectively ensure the safety in use, and the installation of the fan assembly can also be applied to hair dryers.

[0014] Further, a sealing ring is arranged between the fan cover and the movable impeller.

[0015] The beneficial effects of the above technical scheme are that the sealing ring is arranged to ensure that the fan cover does not leak air, ensuring smooth air outlet and low noise.

[0016] Further, the bearing assembly is provided with a pressure ring on both sides.

[0017] The beneficial effects of the above technical scheme are that the pressure ring is arranged to fix the bearing assembly, ensuring that the bearing does not move during use and effectively prolonging the service life.

[0018] Further, the stator assembly comprises: a lower framework, an iron core and an upper framework, the upper framework is connected with the lower framework to fix the iron core, a coil is wound on the iron core, and the lower framework is connected with the shell assembly.

[0019] The beneficial effects of the above technical scheme are that the stator assembly is arranged to cooperate with the magnet to drive the rotating shaft to rotate, and the lower framework and the upper framework are fixed, and the iron core does not shake, facilitating installation.

[0020] Further, a circuit board is arranged on the upper side of the stator assembly, and a cover plate is arranged on the upper side of the circuit board.

[0021] The circuit board is arranged to be connected with the coil, and the cover plate is arranged to play a protection role, thereby ensuring safe use and prolonging service life. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced.

[0023] Figure 1 is the overall structure sectional view of the brushless suction motor of the present application

[0024] Figure 2 is the exploded view of the brushless suction motor of the present application

[0025] Figure 3 is the exploded view of the rotor assembly, bearing assembly and housing assembly of the present application

[0026] Figure 4 is the sectional view of the rotor assembly and bearing assembly of the present application

[0027] Figure 5 is the structure view of the fixed impeller of the present application

[0028] The reference signs involved in the drawings are as follows:

[0029] Housing assembly 1; bearing chamber 11; receiving and positioning surface 111; stator assembly 2; lower framework 21; fixed block 211; iron core 22; upper framework 23; mounting seat 231; terminal 232; boss 233; circuit board 24; cover plate 25; rotating shaft 3; magnet 31; balance ring 32; first bearing 4; second bearing 41; third bearing 42; spring 43; pressing ring 44; fan assembly 5; fan cover 51; movable impeller 52; fixed impeller 53; mounting plate 531; sealing ring 54. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below with reference to the drawings.

[0031] As shown in Figures 1-5 The present application discloses a brushless suction motor, comprising: a housing assembly 1, a bearing assembly, a stator assembly 2 and a rotor assembly, the rotor assembly is arranged in the housing assembly 1, the stator assembly 2 is arranged outside the rotor assembly, the rotor assembly comprises a rotating shaft 3, the bearing assembly is sleeved on the rotating shaft 3, comprising a first bearing 4, a second bearing 41 and a third bearing 42, the housing assembly 1 is provided with a bearing chamber 11 for accommodating and positioning the bearing assembly.

[0032] The beneficial effect of the above technical scheme is that the bearing chamber 11 is arranged to position the rotating shaft 3, facilitating the installation of the entire motor, reducing the installation time, and improving the noise and prolonging the service life.

[0033] In some embodiments, the first bearing 4 is located on the upper side, the second bearing 41 and the third bearing 42 are arranged side by side at the bottom of the bearing chamber 11, the inner rings of the first bearing 4, the second bearing 41 and the third bearing 42 are connected with the rotating shaft 3 in interference, and the outer sides of the bearings are fixed with the bearing chamber 11 by gluing. The three bearings not only facilitate assembly, but also effectively ensure that the rotating shaft 3 does not shake during rotation, effectively prolonging the service life. A spring 43 is arranged between the first bearing 4 and the second bearing 41, the spring 43 is sleeved on the rotating shaft 3, and the spring 43 applies a pre-tightening force to the bearing to prevent abnormal noise of the bearing caused by vibration or resonance during work.

[0034] In some embodiments, the rotor assembly further comprises: a magnet 31 sleeved on the rotating shaft 3 and located on the upper side of the bearing assembly, a balance ring 32 is arranged on the upper side of the magnet 31, the balance ring 32 is connected with the rotating shaft 3 in interference, the inside of the magnet 31 is fixed with the rotating shaft 3 by gluing, the magnet 31 drives the rotating shaft 3 to rotate, and the balance ring 32 plays a limiting role to ensure the installation position of the magnet 31.

[0035] Further, the bottom of the bearing chamber 11 is provided with a receiving positioning surface 111, the third bearing 42 is in contact with the receiving positioning surface 111, after the installation of the three bearings and the rotating shaft 3 is completed, the rotating shaft 3 is placed into the bearing chamber 11, the receiving positioning surface 111 plays a positioning role, the stator assembly 2 can be assembled without interfering with the stator positioning surface height without increasing the height, the precision is higher, and the adverse effects on performance, service life and the like are smaller.

[0036] In some embodiments, the lower side of the housing assembly 1 is provided with a fan assembly 5, including a fan cover 51, a movable impeller 52 and a fixed impeller 53, the fixed impeller 53 is fixed in the housing assembly 1, the movable impeller 52 is connected with the rotating shaft 3, the fan cover 51 is connected with the housing assembly 1, the lower side of the movable impeller 52 is provided with an air inlet, the middle of the fan cover 51 is provided with a ventilation hole for communication with the air inlet, the side of the movable impeller 52 is provided with a plurality of blades, forming wind in the rotating process, entering the fixed impeller 53, the fixed impeller 53 includes a plurality of blades arranged around and a mounting plate 531 for mounting, a wind guide channel is formed between the blades, playing a wind guide role, the mounting plate 531 is locked on the lower side of the housing assembly 1 by screws, the fan cover 51 is sleeved on the housing assembly 1 and is tightly installed, and the arrangement of the fan cover 51 can effectively ensure the safety in use. The installation of the fan assembly 5 can be applied to a hair dryer to realize the blowing function.

[0037] Further, the sealing ring 54 is arranged between the wind cover 51 and the moving vane 52, the bottom of the wind cover 51 is provided with a sealing ring groove, the sealing ring 54 is arranged in the sealing ring groove, the lower side of the moving vane 52 is provided with a protruding part extending downward, the protruding part is in contact with the sealing ring 54, so that the air flow is smooth and the noise is small.

[0038] In some embodiments, the bearing assembly is provided with a press ring 44 on both sides, the press ring 44 is in interference connection with the rotating shaft 3, the press ring 44 is arranged to fix the bearing assembly, so that the bearing does not move during use, effectively prolonging the service life.

[0039] In some embodiments, the stator assembly 2 comprises a lower framework 21, an iron core 22 and an upper framework 23, the upper framework 23 is connected with the lower framework 21 to fix the iron core 22, the iron core 22 is wound with a coil, the lower framework 21 is connected with the shell assembly 1, the lower framework 21 and the upper framework 23 are provided with through holes, the shell assembly 1 is provided with corresponding threaded holes, the upper framework 23 and the lower framework 21 can be connected by long screws, the upper framework 23 is further provided with a mounting seat 231, a terminal 232 is inserted into the mounting seat 231, the terminal 232 is inserted into the mounting seat 231 to fix the end of the coil in the mounting seat 231, so that the terminal 232 is connected with both ends of the coil.

[0040] The lower framework 21 is provided with a fixing block 211, the iron core 22 is provided with a through hole, the fixing block 211 is inserted into the through hole for fixation, the middle part of the iron core 22 is provided with a through hole for passing the magnet 31, the coil generates a magnetic field when electrified, driving the magnet 31 to drive the rotating shaft 3 to rotate.

[0041] Further, the upper side of the stator assembly 2 is provided with a circuit board 24, the upper side of the circuit board 24 is provided with a cover plate 25, the upper framework 23 is provided with a boss 233, the bottom of the circuit board 24 is fixed with a mounting block, the two are connected and fixed by screws, the circuit board 24 is welded and fixed with the terminal 232, the cover plate 25 is connected with the circuit board 24 by screws, the cover plate 25 is provided with a relief hole for avoiding the wiring.

[0042] The beneficial effects of the above technical scheme are that the circuit board 24 is arranged to be connected with the terminal, the cover plate 25 is arranged to play a protective role, ensuring safe use and prolonging the service life.

[0043] The installation process is as follows: firstly, the compression ring 44 is compressed into the rotating shaft 3, the first bearing 4 is installed into the rotating shaft 3, then the spring 43 is placed on the first bearing 4, the second bearing 41 and the third bearing 42 are installed into the rotating shaft 3 and compressed into the compression ring 44, the three bearings and the rotating shaft form an integrated rotor, facilitating installation. Subsequently, the magnet 31 is installed, the balance ring 32 is compressed, the first bearing 4, the second bearing 41 and the third bearing 42 are fixed with the bearing chamber 11 in the shell assembly by gluing; the stator assembly 2 is fixed with the shell assembly by locking screws. The fan part is assembled in the same way as a conventional double-bearing brushless suction motor; the circuit board 24 is positioned by the boss 233 of the upper frame 23, the terminal 232 is fixed with the solder pad of the circuit board 24 by soldering, and the rear cover is fixed with the upper frame 23 by locking screws. The support positioning is reduced, so the concentricity is better and the precision is higher. The working life of the brushless suction motor can be prolonged. The separate balancing process of the rotor assembly is reduced, the whole machine is balanced based on the structure adaptation, the assembly efficiency is improved. Moreover, the number of parts is reduced, the cost is reduced, the process is reduced, the air flow is smoother, the noise and performance are better.

[0044] For those skilled in the art, without departing from the inventive concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A brushless suction motor, characterized by, The application relates to a motor assembly. The first bearing (4) is located on the upper side, the second bearing (41) and the third bearing (42) are arranged side by side at the lower end of the rotating shaft (3), and the spring (43) is arranged between the first bearing (4) and the second bearing (41).

2. The brushless suction motor according to claim 1, characterized in that The rotor assembly further comprises a magnet (31) sleeved on the rotating shaft (3) and located on the upper side of the bearing assembly, and the upper side of the magnet (31) is provided with a balance ring (32).

3. The brushless suction motor of claim 1, wherein, The bottom of the bearing chamber (11) is provided with a receiving and positioning surface (111), and the third bearing (42) is in contact with the receiving and positioning surface (111).

4. The brushless suction motor of claim 2, wherein, The lower side of the shell assembly (1) is provided with a fan assembly (5) comprising a fan cover (51), a movable vane (52) and a fixed vane (53), the fixed vane (53) is fixed in the shell assembly (1), the movable vane (52) is connected with the rotating shaft (3), and the fan cover (51) is connected with the shell assembly (1).

5. The brushless suction motor of claim 1, wherein The fan cover (51) and the movable vane (52) are provided with a sealing ring (54).

6. The brushless suction motor of claim 5, wherein, Both sides of the bearing assembly are provided with a press ring (44).

7. The brushless suction motor of claim 1, wherein The stator assembly (2) comprises a lower framework (21), an iron core (22) and an upper framework (23), the upper framework (23) is connected with the lower framework (21) to fix the iron core (22), the iron core (22) is wound with a coil, and the lower framework (21) is connected with the shell assembly (1).

8. The brushless suction motor of claim 1, wherein, The upper side of the stator assembly (2) is provided with a circuit board (24), and the upper side of the circuit board (24) is provided with a cover plate (25).

9. The brushless suction motor of claim 1, wherein, ​

Images