Disc type brushless motor

Abstract

The utility model discloses a disc type brushless motor which comprises a support, a rotating shaft, a control panel, a coil, a rotor and fan blades, the control panel is fixed on the support, the coil is fixed on the control panel and is electrically connected with the control panel, the fan blades are sleeved on the rotating shaft, one end of the rotating shaft is sleeved on the support, and the other end of the rotating shaft penetrates out after penetrating through the fan blades. The rotor is fixed to the lower end face of the fan blade and corresponds to the coil. The coil is directly fixed on the control panel, and the rotor is fixed on the fan blades, so that the mounting structure of the coil and the rotor is greatly simplified, other mounting brackets are not needed, the space occupied by the whole coil and the rotor is greatly reduced, and the whole motor is flat in volume, very small and thin; the requirement for the installation space of the motor on an electric appliance is low, the overall size is reduced, and the height is reduced; the control panel is directly fixed on the bracket, so that the wiring of the coil and the control of the operation of the motor are facilitated, the wiring is greatly simplified, the control of the whole motor is more convenient, and the whole structure is simplified.

Description

Technical Field

[0001] The utility model belongs to a motor, in particular to a disc-type brushless motor. Background Art

[0002] Various existing small household appliances, such as air fryers, ovens, microwave ovens, hair dryers, etc., use brushless motors with relatively complex structures and large sizes. For example, application number 201921546568.8 discloses a brushless motor for an air fryer, including a brushless motor body, which includes an integrally packaged stator core, a rotating shaft and a Hall circuit board. The outer side of the brushless motor body is covered with a front cover and a rear cover, and the front and rear sides of the front cover are respectively provided with an integrally formed support frame and a protrusion, the protrusion is fixedly embedded in the inner cavity of the stator core along the direction of the rotating shaft, and the rotating shaft is movably installed in the protrusion through a bearing, and the outer extension of the rotating shaft is sequentially installed with an oil-removing wind wheel that blocks the front side of the brushless motor body and an air-supply wind wheel for forming a high-speed circulating airflow; combined with the drawings in its specification, it can be seen that the entire motor is large in size. Therefore, during installation, more installation positions need to be reserved, which increases the size of the entire appliance accordingly, which is not conducive to reducing the size of the household appliance. Utility Model Content

[0003] The purpose of the present utility model is to provide a disc-type brushless motor that can solve at least one of the above problems.

[0004] According to one aspect of the present invention, a disc-type brushless motor is provided, comprising a bracket, a rotating shaft, a control panel, a coil, a rotor and a fan blade, wherein the control panel is fixed on the bracket, the coil is fixed on the control panel and electrically connected to the control panel, the fan blade is sleeved on the rotating shaft, one end of the rotating shaft is sleeved on the bracket, and the other end of the rotating shaft passes through the fan blade and out, the rotor is fixed on the lower end surface of the fan blade, and the rotor and the coil are arranged correspondingly.

[0005] The beneficial effects of the present invention are as follows: by directly fixing the coil on the control board and fixing the rotor on the fan blade, the installation structure of the coil and the rotor is greatly simplified, and no other installation bracket is required, so that the space occupied by the entire coil and the rotor is greatly reduced, thereby making the volume of the entire motor flat, very small and thin, and requiring less installation space for the motor on the electrical appliance, which is conducive to reducing the overall volume and height; by directly fixing the control board on the bracket, the wiring of the coil and the control of the motor operation are facilitated, which greatly simplifies the wiring, makes the control of the entire motor more convenient, and simplifies the overall structure.

[0006] In some embodiments, the coils are arranged in multiple groups, and the coils are shaped like sectors, squares, circles, or triangles, and the number of coils is multiple. Thus, the corresponding requirements for the number of motor stages can be met by using multiple groups of coils.

[0007] In some embodiments, a mounting slot is provided on the lower end surface of the fan blade, into which the rotor is fixed. The lower end surface of the fan blade is provided with multiple blades, all of which are located on the outer periphery of the rotor. Thus, the mounting slot facilitates securing the rotor to the fan blade, and the distribution of the blades facilitates heat dissipation during motor operation.

[0008] In some embodiments, the disc-type brushless motor further includes a mounting plate secured to the upper end surface of the control board. The coil is secured to the control board via the mounting plate. The mounting plate is provided with a securing protrusion, with the coil engaging the securing protrusion. Thus, the provision of the mounting plate facilitates the installation and securing of the coil, meeting various usage requirements.

[0009] In some embodiments, there are multiple fixing protrusions corresponding to the coils, and the mounting plate is provided with an annular through-hole. The fixing protrusions are all located above the annular through-hole. A first clearance is provided between the outer wall of the fixing protrusion and the mounting plate, and a second clearance is provided between the side walls of the fixing protrusion and the annular through-hole. Thus, the provision of the annular through-hole and multiple clearances facilitates the assembly of the coils on the fixing protrusions and facilitates the threading of the coils.

[0010] In some embodiments, a mounting sleeve is provided in the middle of the bracket, and one end of the rotating shaft is sleeved within the mounting sleeve. The mounting sleeve includes a vertical portion and a tapered portion, with the tapered portion located above the vertical portion. The bracket is sleeved outside the vertical portion, and the control panel is sleeved outside the tapered portion. The mounting sleeve has a mounting hole, and a bearing is sleeved within the mounting hole. One end of the rotating shaft is sleeved within the bearing. Thus, the provision of the mounting sleeve and the bearing facilitates the mating of the bracket and the rotating shaft, facilitating rotation of the rotating shaft.

[0011] In some embodiments, a plurality of ventilation holes are formed on the fan blade, thereby facilitating air flow through the first ventilation hole, the ventilation slots, and the ventilation holes, thereby facilitating rapid heat dissipation.

[0012] In some embodiments, the brushless disc motor further includes a circlip, which is mounted on one end of the shaft and abuts against the bottom end of the bearing. Thus, the circlip can define the relative position of the bearing and the shaft, facilitating smooth rotation of the shaft.

[0013] In some embodiments, a mounting groove is provided on the lower end surface of the fan blade, and the rotor is fixed in the mounting groove. The lower end surface of the fan blade is formed with multiple blades, and the multiple blades are all around the outer periphery of the rotor. Thus, the provision of the mounting groove can facilitate the installation of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the disc-type brushless motor of the present utility model.

[0015] Figure 2It is a schematic cross-sectional view of the disc-type brushless motor of the present invention.

[0016] Figure 3 It is a structural schematic diagram of other structures except the fan blades in the disc-type brushless motor of the present invention.

[0017] Figure 4 It is a structural schematic diagram of one embodiment of the fan blade in the disc-type brushless motor of the present invention.

[0018] Figure 5 It is a structural diagram of another embodiment of the disc-type brushless motor of the present utility model.

[0019] Figure 6 It is a structural schematic diagram of a mounting sleeve in a disc-type brushless motor of the present invention.

[0020] Figure 7 It is a structural schematic diagram of a mounting plate in a disc-type brushless motor of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Reference Figures 1 to 3 and Figure 6 The disc-type brushless motor includes a bracket 1, a rotating shaft 2, a control board 3, a coil 4, a rotor 5, and a fan blade 6. The control board 3 is fixed to the bracket 1, and the coil 4 is fixed to the control board 3 and electrically connected to the control board 3 via a wire. The fan blade 6 is sleeved on the rotating shaft 2, one end of the rotating shaft 2 is sleeved on the bracket 1, and the other end of the rotating shaft 2 passes through the fan blade 6 and then exits. The rotor 5 is fixed to the lower end surface of the fan blade 6, and the rotor 5 is arranged corresponding to the coil 4. In this way, the coil 4 is directly fixed to the control board 3, eliminating the existing coil mounting bracket; at the same time, the rotor 5 is embedded in the fan blade 6, eliminating the rotor mounting frame and other structures, thereby greatly reducing the thickness of the entire motor. The overall thickness from the bracket 1 to the fan blade 6 is 8 to 12 mm, which is much smaller than the thickness of existing conventional brushless motors. This facilitates the installation of the entire motor on the electrical appliance and helps to reduce the overall volume.

[0023] A mounting sleeve 9 is provided in the middle of the bracket 1, and one end of the rotating shaft 2 is sleeved within the mounting sleeve 9. The mounting sleeve 9 includes a vertical portion 91 and a tapered portion 92. The tapered portion 92 is located above the vertical portion 91. The bracket 1 is sleeved outside the vertical portion 91, and the control board 3 is sleeved outside the tapered portion 92. The mounting sleeve 9 is an integrally formed structure. In actual use, an outward-facing limiting step 93 is formed at the connection between the vertical portion 91 and the tapered portion 92. The limiting step 93 can limit the installation position of the control board 3, facilitating rapid installation of the control board 3.

[0024] This disc-type brushless motor can be used in small appliances such as hair dryers, air fryers, ovens, and microwave ovens. The coil 4 is glued to the upper (back) surface of the control board 3. The lower (front) surface of the control board 3 houses various circuit components. The control board 3 performs the same functions as existing motor control circuits, facilitating control of the motor's operating state and stopping. The upper surface of the fan blade 6 is flat, minimizing interference with the installation of other components.

[0025] The control board 3 is directly fixed on the bracket 1, so that the coil 4 does not need an external wire, which facilitates the connection of multiple groups of coils with the control board 3 and greatly simplifies the overall wiring.

[0026] There are multiple coils, and the shape of coil 4 can be fan-shaped, square, circular, triangular or other shapes. Coil 4 is horizontally laid and fixed on the control board 3. When coil 4 is energized, it acts on the rotor 5, which drives the fan blades 6 and the rotating shaft 2 to rotate, realizing the normal operation of the motor.

[0027] The rotor 5 is annular, which facilitates the embedded installation of the rotor on the fan blade 6. After one end of the rotor 5 is embedded in the fan blade 6, the rotor 5 and the fan blade 6 form a whole, which is conducive to the overall rotation.

[0028] The disc-type brushless motor also includes a mounting plate 8, which is fixed to the upper end surface of the control board 3. The coil 4 is fixed to the control board 3 via the mounting plate 8. The mounting plate 8 is provided with a fixing protrusion 81, which mates with the coil 4. The mounting plate 8 is a thin plate, and the fixing protrusion 81 and the mounting plate 8 are integrally formed. The shape of the mounting protrusion 81 matches the shape of the inner coil of the coil. The mounting plate 8 and the control board 3 are both fixed to the bracket 1 with screws.

[0029] like Figures 1 to 4 and Figure 7 As shown, there are multiple fixing protrusions 81 corresponding to the coils 4, and an annular through-hole 82 is opened on the mounting plate 8. The fixing protrusions 81 are all located above the annular through-hole 82. A first escape position 83 is provided between the outer side wall of the fixing protrusion 81 and the mounting plate 8, and a second escape position 84 is provided between the side walls of the fixing protrusion 81 and the annular through-hole 82. By providing the annular through-hole 82, the first escape position 83, and the second escape position 84, after the coil 4 is sleeved on the fixing protrusion 81, the lead-out wire can pass through the annular through-hole 82, the first escape position 83, or the second escape position 84, without having to pull the entire wire out and then sort it out, which facilitates the assembly of the coil and the passing of the wire.

[0030] In actual use, whether the mounting plate 8 is required can be selected according to actual needs. When the mounting plate 8 is not required, the coil 4 can be directly bonded and fixed to the end surface of the control board 3 .

[0031] The lower end surface of the fan blade 6 is provided with a mounting groove 61, into which the rotor 5 is secured. A plurality of blades 62 are formed on the lower end surface of the fan blade 6, and each of the blades 62 is located on the outer periphery of the rotor 5. The mounting groove 61 opens downward, and the rotor 5 is embedded and secured within the mounting groove 61. Alternatively, gluing can be used to enhance the stability of the rotor 5 within the mounting groove 61. The fan blade 6 and blades 62 are integrally injection-molded or stamped, and can be made of metal or plastic to meet the requirements of different household appliances. Furthermore, the number of blades 62 of the fan blade 6 can be increased or decreased based on actual usage requirements.

[0032] When the blade is an injection molded part (such as Figure 1 As shown), the blade 62 can be set in an arc shape. When the fan blade 6 rotates, the blade 62 rotates to form an airflow, which can take away the heat of the coil and the rotor in time and realize the rapid flow of air. Figure 5 As shown), the blades 62 can be set vertically, and form airflow accordingly when rotating to meet the processing requirements. At the same time, multiple ventilation holes 63 (such as Figure 4 The bracket 1 may be made of metal or plastic to meet the requirements of different scenarios.

[0033] In order for the blade 62 to better form an airflow and act on the coil 4, the lower end surface of the blade 62 is lower than the lower end surface of the rotor 5, and the lower end surface of the blade 62 is lower than the lower end surface of the mounting groove 61, so that when the blade 62 rotates, the airflow formed can better act on the coil 4; at the same time, the part of the blade 62 that exceeds the end surface of the mounting groove 61 can form more airflow when rotating, which facilitates the airflow to enter the space between the coil 4 and the rotor 5, and facilitates the removal of heat from the surface of the coil and the rotor 5, further improving the heat dissipation function of the motor, thereby facilitating the high-speed operation of the motor.

[0034] The shape of the rotor 5 can be a whole ring, a triangle, a square, a sector or other shapes. The shape of the rotor 5 can be selected according to actual conditions, and the shape of the mounting groove 61 also matches the rotor 5.

[0035] A mounting sleeve 11 is formed in the middle of the bracket 1. The mounting sleeve 11 and the bracket 1 are an integrally formed structure. A mounting hole 94 is provided on the mounting sleeve 11. A bearing 7 is sleeved in the mounting hole 94. One end of the rotating shaft 2 is sleeved in the bearing 7.

[0036] The disc-type brushless motor of the present invention further includes an elastic circlip 10, which is sleeved on the end of one end of the rotating shaft 2 and abuts against the bottom end of the bearing 7. By assembling the elastic circlip 10, the relative position of the rotating shaft 2 and the bearing 7 can be fixed, preventing the rotating shaft 2 from being pulled out, and ensuring the normal rotation of the rotating shaft 2.

[0037] The upper end surface of the mounting sleeve 11 is higher than the upper end surface of the coil 4, and the blades 62 are located outside the coil 4. Therefore, when the rotor and the fan blades 6 are rotating, the fan blades are in contact with the upper end surface of the mounting sleeve 11, thereby preventing the rotor and the fan blades from scraping the coil, ensuring the normal use of the coil and protecting the coil.

[0038] When the rotor rotates, it drives the blades 62 to rotate. Under the action of the blades, the air flows quickly, so that the heat generated by the control board 3 can be quickly taken away to achieve heat dissipation; at the same time, the heat generated by the wire slots and the rotor can also be quickly taken away, taking away the heat generated by the various components of the motor when they are working, preventing overheating and increasing the service life of the motor.

[0039] To facilitate installation of the entire motor, bracket 1 includes multiple legs 11. Each leg 11 has a fixing hole 12, which is fitted with a shock-absorbing pad to reduce vibration and noise. The fixing holes 12 on each leg 11 are located outside the outer edge of the fan blade 6. When the motor is installed, external bolts pass through the fixing holes 12 to secure bracket 1 in the desired position, facilitating motor securement.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. Disc type brushless motor, characterized in that, The invention comprises a bracket (1), a rotating shaft (2), a control panel (3), a coil (4), a rotor (5) and a fan blade (6); the control panel (3) is fixed on the bracket (1); the coil (4) is fixed on the control panel (3) and electrically connected to the control panel (3); the fan blade (6) is sleeved on the rotating shaft (2); one end of the rotating shaft (2) is sleeved on the bracket (1); the other end of the rotating shaft (2) passes through the fan blade (6) and then exits; the rotor (5) is fixed on the lower end surface of the fan blade (6); and the rotor (5) and the coil (4) are arranged correspondingly.

2. The disc-type brushless motor according to claim 1, characterized in that: The coils are in multiple groups, the shape of the coils (4) is fan-shaped, square, circular or triangular, and the number of the coils (4) is multiple.

3. The disc-type brushless motor according to claim 2, characterized in that: The lower end surface of the fan blade (6) is provided with a mounting groove (61), the rotor (5) is fixed in the mounting groove (61), and the lower end surface of the fan blade (6) is provided with a plurality of blades (62), and the plurality of blades (62) are all on the outer periphery of the rotor (5).

4. The disc-type brushless motor according to claim 3, characterized in that: The invention also includes a mounting plate (8), wherein the mounting plate (8) is fixed to the upper end surface of the control plate (3), and the coil (4) is fixed to the control plate (3) through the mounting plate (8). The mounting plate (8) is provided with a fixing protrusion (81), and the coil (4) cooperates with the fixing protrusion (81).

5. The disc-type brushless motor according to claim 4, characterized in that: There are multiple fixing protrusions (81) corresponding to the coils (4); an annular through hole (82) is provided on the mounting plate (8); the fixing protrusions (81) are all located above the annular through hole (82); a first avoidance position (83) is provided between the outer side wall of the fixing protrusion (81) and the mounting plate (8); and a second avoidance position (84) is provided between the side walls of both sides of the fixing protrusion (81) and the annular through hole (82).

6. The disc-type brushless motor according to any one of claims 1 to 5, characterized in that: The bracket (1) is provided with a mounting sleeve (9) in the middle portion, one end of the rotating shaft (2) is sleeved in the mounting sleeve (9), the mounting sleeve (9) comprises a vertical portion and a tapered portion, the tapered portion is located above the vertical portion, the bracket (1) is sleeved on the outside of the vertical portion, the control panel (3) is sleeved on the outside of the tapered portion, the mounting sleeve (9) is provided with a mounting hole (94), a bearing (7) is sleeved in the mounting hole (94), and one end of the rotating shaft (2) is sleeved in the bearing (7).

7. The disc-type brushless motor according to claim 6, characterized in that: The fan blade (6) is provided with a plurality of ventilation holes (63).

8. The disc-type brushless motor according to claim 6, characterized in that: It also includes an elastic retaining ring (10), which is sleeved on the end of one end of the rotating shaft (2) and abuts against the bottom end of the bearing (7).

9. The disc-type brushless motor according to claim 1, characterized in that: A mounting groove (61) is provided on the lower end surface of the fan blade (6), and the rotor (5) is fixed in the mounting groove (61). A plurality of blades (62) are formed on the lower end surface of the fan blade (6), and the plurality of blades (62) are all on the outer periphery of the rotor (5).

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