Brushless motor for controlling driving wheel

Abstract

The utility model discloses a brushless motor for controlling a driving wheel, which relates to the field of motor design and comprises a base, a circuit board, a winding stator and a magnetic ring rotor. A bearing seat is formed in the middle of the upper side of the base, a first stepped groove and a second stepped groove are formed in the outer side of the bearing seat, the circuit board is installed on the first stepped groove, and the winding stator is installed on the second stepped groove. A plurality of electronic components are welded and mounted on the circuit board, one or more slots are formed in the circuit board, the electronic components with larger volumes are mounted in the slots in a one-to-one correspondence and clearance fit manner, and ventilation gaps are formed between the electronic components and the slots; one or more receding grooves are formed in the base, and the receding grooves are formed below the open grooves in a one-to-one correspondence mode; according to the utility model, a lifting frame does not need to be arranged, the overall weight and volume of the motor are reduced, and the circuit board is provided with the slots which can accommodate electronic components with larger volumes, so that the overall motor is more compact after being assembled, and meanwhile, the heat dissipation effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor design field especially is related to a brushless motor of control drive wheel. BACKGROUND

[0002] In the position of the walking wheel of the sweeper, the drive wheel of the window cleaner and the like, the motor commonly used in the industry at present is a brush motor with the model of RS500, and this motor has the problems of loud noise, low efficiency, short service life and serious heating during long time operation, so it is necessary to design a brushless motor suitable for these positions.

[0003] The brushless motor on the market drives the rotor to rotate by using the winding stator fixed on the circuit board, for example, the prior art (announcement number: CN216356411U) discloses a brush motor and a sweeper, and the stator is installed on the control board, but when the scheme is implemented, the control board needs to be inlaid and electrically connected with multiple Halls, multiple resistors and multiple capacitors, and part of these electronic components has a relatively large volume, so the stator needs to be lifted by using a lifting frame when being directly inlaid on the control board, which leads to low compactness of the motor, relatively large volume and increased overall weight of the motor, and since the control board is a whole board structure, the heat dissipation speed is slow during work.

[0004] The prior art (announcement number: CN219164320U) further discloses an outer rotor brushless motor, and the air around the stator and the rotor can enter the gap therebetween when the rotor shell rotates by arranging an air inlet on the top wall of the rotor shell, so that the motor has the advantage of fast heat dissipation, but dust in the air will accumulate on the stator after long time work, which leads to small rotating gap and seriously affects the efficiency of the motor, and the air flow will be generated in the motor when the air inlet rotates, and the air flow will have certain air resistance, which affects the working efficiency of the motor. TECHNICAL CONTENT

[0005] The utility model overcomes the above-mentioned situation, and provides a technical scheme capable of solving the above-mentioned problems.

[0006] A brushless motor for controlling a drive wheel, comprising a base, a circuit board, a winding stator and a magnetic ring rotor.

[0007] A bearing seat is formed in the middle of the upper side of the base, a first stepped groove and a second stepped groove are formed on the outer side of the bearing seat, the second stepped groove is arranged above the first stepped groove, the circuit board is installed on the first stepped groove, and the winding stator is installed on the second stepped groove.

[0008] The circuit board is welded with a plurality of electronic components, and one or more slots are formed on the circuit board. The larger electronic components are installed in the slots in one-to-one correspondence, and a ventilation gap is formed between the electronic components and the slots.

[0009] One or more empty slots are formed on the base, and the empty slots are arranged below the slots in one-to-one correspondence.

[0010] The middle part of the magnetic ring rotor is rotatably installed in the bearing seat.

[0011] Further, a first positioning hole is formed in the middle part of the circuit board, and the first positioning hole is tightly installed in the first stepped slot. A second positioning hole is formed in the middle part of the winding stator, and the second positioning hole is tightly installed in the second stepped slot.

[0012] Further, a plurality of clamping blocks are formed in the first stepped slot, and the plurality of clamping blocks are arranged in a circular array. The first positioning hole of the circuit board is tightly installed in the first stepped slot through the plurality of clamping blocks.

[0013] Further, one or more limiting blocks are formed in the first stepped slot, and one or more limiting grooves are formed in the first positioning hole. The limiting blocks are installed in the limiting grooves in a clearance fit.

[0014] Further, a plurality of arc-shaped sheets are formed in the second stepped slot, and the second positioning hole is tightly installed in the second stepped slot through the arc-shaped sheets.

[0015] Further, the magnetic ring rotor includes a rotating cover, a shaft and a permanent magnet ring. The rotating cover is installed on the winding stator, the permanent magnet ring is fixedly installed in the rotating cover, the winding stator is installed in the permanent magnet ring in a clearance fit, the shaft is fixedly installed in the middle part of the rotating cover, and the shaft is rotatably installed in the bearing seat.

[0016] Further, rolling bearings are installed at the upper and lower ends of the bearing seat, and the shaft is inserted and connected to the inner rings of the two rolling bearings.

[0017] Further, a clamping spring groove is formed on the shaft, a positioning clamping spring is installed in the clamping spring groove, and the positioning clamping spring is installed at the inner ring of the lower rolling bearing.

[0018] Further, a buffer washer is installed on the shaft, the upper side of the buffer washer is installed in the rotating cover, and the lower side of the buffer washer is installed at the inner ring of the upper rolling bearing.

[0019] Further, the side of the circuit board extends out of the base and the magnetic ring rotor, and a connector is embedded on the side of the circuit board extending out of the magnetic ring rotor.

[0020] Compared with the prior art, the motor has the advantages that

[0021] 1. The first and second stepped grooves are arranged to separate the circuit board and the winding stator, so that the raised frame is not needed, the weight and size of the motor are reduced, and the winding stator can be stably installed;

[0022] 2. The groove is arranged on the circuit board to accommodate the electronic components with large size, and the electronic components are installed in the clearance of the base, so that the motor is compact after assembly, and the size of the motor is reduced;

[0023] 3. The electronic components and the groove form a ventilation gap, when the magnetic ring rotor rotates, air flow is generated, the air flow passes through the ventilation gap, and is input or output from the gap between the base and the magnetic ring rotor, so that the heat generated during the operation of the motor is effectively removed, the heat dissipation effect is achieved, and the stability of the motor during long-time operation is improved.

[0024] The additional aspects and advantages of the present application will be partially given in the following description, and some will become apparent from the following description, or will be understood by those skilled in the art through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0026] Figure 1 is a structural schematic view of the present application;

[0027] Figure 2 is an exploded structural schematic view of the present application;

[0028] Figure 3 is Figure 2 is a structural schematic view from another perspective;

[0029] Figure 4 is a structural schematic view of the base, the circuit board and the winding stator.

[0030] As shown in the figure: 1, base; 2, circuit board; 3, winding stator; 4, magnetic ring rotor; 41, rotating cover; 42, rotating shaft; 43, permanent magnet ring; 5, bearing seat; 6, first stepped groove; 7, second stepped groove; 8, electronic components; 9, slotted; 10, clearance groove; 11, first positioning hole; 12, second positioning hole; 13, clamping block; 14, limiting block; 15, limiting groove; 16, arc-shaped sheet; 17, rolling bearing; 18, clamping spring groove; 19, positioning clamping spring; 20, buffer washer; 21, connector. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments.

[0032] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0033] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0034] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] As Figures 1-4The utility model discloses a control brushless motor of drive wheel, including base 1, circuit board 2, winding stator 3 and magnetic ring rotor 4,

[0037] The middle part of the upper side of base 1 is formed with bearing seat 5, the outer side of bearing seat 5 is formed with first step groove 6 and second step groove 7, second step groove 7 is arranged above first step groove 6, circuit board 2 is installed on first step groove 6, winding stator 3 is installed on second step groove 7,

[0038] A plurality of electronic components 8 are welded and installed on circuit board 2, one or more grooves 9 are formed on circuit board 2, the larger volume electronic component 8 is installed in groove 9 in one-to-one clearance fit, and a ventilation gap is formed between electronic component 8 and groove 9,

[0039] One or more empty grooves 10 are formed on base 1, and the empty groove 10 is arranged below the groove 9 in one-to-one correspondence,

[0040] The middle part of magnetic ring rotor 4 is rotatably fitted and installed in bearing seat 5,

[0041] The principle is: the structure of first step groove 6 and second step groove 7 is arranged, circuit board 2 and winding stator 3 are separated, a lifting frame is not needed, the weight and volume of the whole motor are reduced, and the stable installation of winding stator 3 can also be ensured; the groove 9 is formed on the circuit board 2, the groove 9 can accommodate the larger volume electronic component 8, and the empty groove 10 on the base 1 is matched, the installation of the electronic component 8 is avoided, and the whole motor is more compact after assembly, and the volume of the motor is reduced; a ventilation gap is formed between the electronic component 8 and the groove 9, when the magnetic ring rotor 4 rotates, a certain airflow is generated, the airflow passes through the ventilation gap, and then is input or output from the cooperation gap between the base 1 and the magnetic ring rotor 4, thereby effectively taking away the heat generated during the operation of the motor, achieving the effect of rapid heat dissipation, and improving the stability of the motor during long-time operation.

[0042] The utility model can be set to the same size as the model RS500 brush motor, can be directly used in the position such as floor cleaning machine walking wheel, window cleaning machine drive wheel, has higher motor efficiency, and brushless motor has the advantages of small size, low noise, high efficiency, long service life, large torque and low interference compared with brush motor.

[0043] Further, the middle part of circuit board 2 is formed with first positioning hole 11, first positioning hole 11 is tightly fitted and installed in first step groove 6, the middle part of winding stator 3 is formed with second positioning hole 12, and second positioning hole 12 is tightly fitted and installed in second step groove 7; through the tight fitting and installation of the positioning hole and the step groove, the stable installation of circuit board 2 and winding stator 3 on bearing seat 5 is realized.

[0044] Further: a plurality of clamping blocks 13 are formed in the first stepped groove 6, and the plurality of clamping blocks 13 are arranged in a circular array with each other, and the first positioning hole 11 of the circuit board 2 is tightly fitted and installed in the first stepped groove 6 through the plurality of clamping blocks 13; the cooperation between the first positioning hole 11 and the first stepped groove 6 is more stable.

[0045] Further: one or more limiting blocks 14 are formed in the first stepped groove 6, and one or more limiting grooves 15 are formed in the first positioning hole 11, and the limiting block 14 is clearance-fitted and installed in the limiting groove 15; the angle limiting can be realized, so that the circuit board 2 cannot rotate relative to the bearing seat 5, and the installation is more stable.

[0046] Further: a plurality of arc-shaped thin plates 16 are formed in the second stepped groove 7, and the second positioning hole 12 is tightly fitted and installed in the second stepped groove 7 through the arc-shaped thin plates 16; the tightly fitted and installed firmness between the second stepped groove 7 and the second positioning hole 12 can be enhanced, and the stable installation of the winding stator 3 is ensured.

[0047] Further: the magnetic ring rotor 4 comprises a rotating cover 41, a rotating shaft 42 and a permanent magnetic ring 43, the rotating cover 41 is cover-installed on the winding stator 3, the permanent magnetic ring 43 is fixedly installed in the rotating cover 41, the winding stator 3 is clearance-fitted and installed in the permanent magnetic ring 43, the rotating shaft 42 is fixedly installed at the middle part of the rotating cover 41, and the rotating shaft 42 is rotationally fitted and installed in the bearing seat 5; when the winding stator 3 is electrified, the magnetic field of the permanent magnetic ring 43 is matched with each other, a power driving the rotating cover 41 to rotate at high speed is formed, and the rotating movement of the rotating shaft 42 in the bearing seat 5 can ensure the stable rotation of the rotating cover 41.

[0048] Further: the upper and lower ends of the bearing seat 5 are both fitted and installed with rolling bearings 17, and the rotating shaft 42 is plug-fitted and installed at the inner rings of the two rolling bearings 17; the rotation fitting of the rotating shaft 42 in the bearing seat 5 is more stable, and the rotating shaft 42 will not shake during the rotation.

[0049] Further: a circlip groove 18 is formed on the rotating shaft 42, a positioning circlip 19 is fitted and installed in the circlip groove 18, and the positioning circlip 19 is abutted and installed at the inner ring of the lower rolling bearing 17; the stable assembly of the motor is completed by the positioning circlip 19 clamped into the circlip groove 18, so that the motor will not loosen after the assembly is completed, and compared with the existing brushless suspension motor, the motor has higher stability and improves the service life of the motor.

[0050] Further, the shaft 42 is sleeved with a buffer washer 20, the upper side of the buffer washer 20 is abuttingly installed in the rotating cover 41, and the lower side of the buffer washer 20 is abuttingly installed at the inner ring of the upper rolling bearing 17; the stable assembly of the motor can be realized by the buffer washer 20 and the positioning circlip 19, the axial pressure can be slowed down and reset by the buffer washer 20, so that the motor is not easy to be damaged.

[0051] Further, the side of the circuit board 2 extends out of the base 1 and the magnetic ring rotor 4, and the side of the circuit board 2 extending out of the magnetic ring rotor 4 is embedded with a connector 21; the circuit board 2 can output FG signals through the connector 21, so that the operator can identify the rotating speed of the motor, and the PWN speed regulation, brake and other functions can be realized through the connector 21, thereby facilitating the operation and use of the motor.

[0052] The embodiment is not limited in shape, material, structure and the like of the utility model in any form, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model all belong to the protection scope of the utility model technical scheme.

Claims

1. A brushless motor for controlling a driving wheel, comprising a base, a circuit board, a winding stator and a magnetic ring rotor; characterized in that a bearing seat is formed in the middle of the upper side of the base, a first stepped groove and a second stepped groove are formed on the outer side of the bearing seat, the second stepped groove is arranged above the first stepped groove, the circuit board is installed on the first stepped groove, and the winding stator is installed on the second stepped groove; a plurality of electronic components are welded and installed on the circuit board, one or more grooves are formed on the circuit board, the larger electronic components are installed in the grooves in one-to-one corresponding clearance fit, and a ventilation gap is formed between the electronic components and the grooves; one or more clearance grooves are formed on the base, and the clearance grooves are arranged one by one below the grooves; the middle part of the magnetic ring rotor is rotatably fitted and installed in the bearing seat.

2. A brushless motor for controlling a drive wheel according to claim 1, characterized in that: a first positioning hole is formed in the middle part of the circuit board, the first positioning hole is tightly fitted and installed in the first stepped groove, a second positioning hole is formed in the middle part of the winding stator, and the second positioning hole is tightly fitted and installed in the second stepped groove.

3. A brushless motor for controlling a drive wheel according to claim 2, characterized in that: a plurality of clamping blocks are formed in the first stepped groove, the clamping blocks are arranged in a circular array, and the first positioning hole of the circuit board is tightly fitted and installed in the first stepped groove through the clamping blocks.

4. A brushless motor for driving a wheel as claimed in any one of claims 2 or 3, wherein: one or more limiting blocks are formed in the first stepped groove, and one or more limiting grooves are formed in the first positioning hole, the limiting blocks are installed in the limiting grooves in clearance fit.

5. A brushless motor for controlling a drive wheel as claimed in claim 2, characterized in that: a plurality of arc-shaped sheets are formed in the second stepped groove, and the second positioning hole is tightly fitted and installed in the second stepped groove through the arc-shaped sheets.

6. A brushless motor for controlling a drive wheel according to claim 1, characterized in that: The magnetic ring rotor comprises a rotating cover, a rotating shaft and a permanent magnet ring, the rotating cover is covered and installed on the winding stator, the permanent magnet ring is fixedly installed in the rotating cover, the winding stator is installed in the permanent magnet ring in clearance fit, the rotating shaft is fixedly installed in the middle part of the rotating cover, and the rotating shaft is rotatably fitted and installed in the bearing seat.

7. A brushless motor for controlling a drive wheel according to claim 6, characterized in that: Rolling bearings are fitted and installed at the upper and lower ends of the bearing seat, and the rotating shaft is inserted and fitted and installed at the inner rings of the two rolling bearings.

8. A brushless motor for controlling a drive wheel according to claim 7, characterized in that: A clamping spring groove is formed on the rotating shaft, a positioning clamping spring is fitted and installed in the clamping spring groove, and the positioning clamping spring is abutted and installed at the inner ring of the lower rolling bearing.

9. A brushless motor for driving a wheel as claimed in claim 8, characterized in that: A buffer washer is sleeved and installed on the rotating shaft, the upper side of the buffer washer is abutted and installed in the rotating cover, and the lower side of the buffer washer is abutted and installed at the inner ring of the upper rolling bearing.

10. A brushless motor for controlling a drive wheel according to claim 1, characterized in that: The side edges of the circuit board extend out of the base and the magnetic ring rotor, and a connector is embedded and installed on the side of the circuit board extending out of the magnetic ring rotor.

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