CN204794630U

CN204794630U - Brushless motor

Info

Publication number: CN204794630U
Application number: CN201520431637.6U
Authority: CN
Inventors: 孙志平; 孙永涛
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2015-06-19
Filing date: 2015-06-19
Publication date: 2015-11-18
Anticipated expiration: 2025-06-19

Abstract

The utility model discloses a brushless motor, including PCB board, iron core, rotor, skeleton, coil, hall device, the skeleton sets up on the PCB board, coil winding is in on the skeleton and form the coil pack, hall device sets up on the PCB board, the rotor sets up in the iron core, the iron core includes the iron core outer lane and sets up a plurality of utmost point teeth in the iron core outer lane, and is a plurality of utmost point tooth adopts the same size, the coil pack cover is established link to each other in the utmost point tooth and with the PCB board, all be equipped with the clearance between utmost point tooth and the utmost point tooth, hall device set up in the below in clearance to form hall response department, hall device's height is no longer than the height of each utmost point tooth bottom surface apart from the PCB board. The utility model discloses a design of a plurality of mutually homopolar teeth, fine solution adopt different utmost point teeth to lead to the fact among the prior art production assembly efficiency low, influence the problem of the self -align and start -up of motor.

Description

A kind of brushless electric machine

Technical field

The utility model relates to a kind of motor, particularly relates to a kind of brushless electric machine, belongs to machine field.

Background technology

At present, usually, brushless electric machine comprises the position of rotation detecting element (such as, Hall IC) of the rotor possessing permanent magnet and the position of magnetic pole being arranged on the permanent magnet for detection rotor in stator side.The pole tooth be arranged on iron core is also comprised in brushless electric machine, the design of hall sensing is adopted in brushless electric machine, in order to make way for the installation of direct insertion hall device, at present, in brushless electric machine, pole tooth on iron core is traditionally arranged to be four, usually the pole tooth of iron core is made different, each pole tooth is special construction by being arranged on pole tooth crest and is distinguished by the length etc. between each pole tooth, four pole teeth are distinguished, the brushless electric machine made like this must be distinguished four pole teeth when assembling, this design is adopted to significantly reduce the production efficiency of assembling of brushless electric machine to a certain extent, moreover four pole teeth adopt above-mentioned project organization, certain unfavorable factor is also existed for the self-align of motor and starting problem.

At Figure 1A, the pole tooth assembling mode in the iron core of brushless electric machine in currently available technology is described in Figure 1B and Fig. 1 C, in the prior art, iron core in brushless electric machine has four different pole teeth, four pole teeth are respectively the first pole tooth 11, second pole tooth 12, 3rd pole tooth 13, 4th pole tooth 14, the 3rd pole tooth 13 in above-mentioned four pole teeth and the 4th pole tooth 14 are same pole tooth, by being arranged on the special construction 17 of pole tooth tip and different between being differentiated separately by the length etc. between each pole tooth between other two pole teeth from the 3rd pole teeth, four different pole teeth are respectively charged in iron core cylindrical 16, in order to hall device of stepping down, breach 15 is provided with between pole tooth and pole tooth, the height that hall device is arranged needs pole tooth about the 1mm of the bottom exceeding iron core, and distinguish 4 different pole teeth by the special construction 17 that is arranged on pole tooth tip and by the length between each pole tooth etc.

Therefore, in prior art, brushless electric machine adopts when assembling and distinguishes four pole teeth, this design is adopted to significantly reduce the production efficiency of assembling of brushless electric machine to a certain extent, moreover four pole teeth adopt above-mentioned project organization, there is certain unfavorable factor for the self-align of motor and starting problem.

Utility model content

Main purpose of the present utility model is that the production efficiency of assembling that the different pole tooth of employing existed to solve above-mentioned brushless electric machine causes is low, affect the problem that motor is self-align and start, provide a kind of easy to assembly, structure simple, effectively can improve the brushless electric machine that efficiency of assembling produced by brushless electric machine.

The purpose of this utility model can reach by adopting following technical scheme:

A kind of brushless electric machine, comprise pcb board, iron core, rotor, skeleton, coil, hall device, described skeleton is arranged on pcb board, described coil winding is on described skeleton and form coil block, described hall device is arranged on pcb board, described rotor is arranged in iron core, the distance on top to the pcb board surface of described hall device is the height of hall device, described iron core comprises iron core outer ring and is arranged on the some poles tooth in iron core outer ring, some described poles tooth adopts identical size, and described coil block to be set in the tooth of described pole and to be connected with pcb board.

As a kind of preferred version, between described pole tooth and pole tooth, be equipped with gap.

As a kind of preferred version, described hall device is arranged at the below in described gap, and forms hall sensing place.

As a kind of preferred version, the height of described hall device is no more than the height of each tooth bottom surface, pole distance pcb board.

Advantageous Effects of the present utility model:

The utility model is by the design of some same pole teeth, well solve the production efficiency of assembling that the different pole tooth of the employing that exists in prior art causes low, affect the problem that motor is self-align and start, when motor assembles, reduce the position of Hall and rotor, the magnetic material thickness at amendment rotor and hall sensing place simultaneously, to strengthen the magnetic property of induction region, be gradual change air gap by core design simultaneously, to improve the self-align of brushless electric motor rotor, be conducive to the startup of motor.

Accompanying drawing explanation

Figure 1A is brushless motor iron core structural representation in prior art;

Figure 1B is that in prior art, in brushless motor iron core, pole tooth assembles schematic diagram;

Fig. 1 C is the structural representation of a pole tooth in brushless motor iron core in prior art;

Fig. 2 is a kind of brushless electric machine assembling schematic diagram of the present utility model;

Fig. 3 is the core structure schematic diagram of a kind of brushless electric machine of the present utility model;

Fig. 4 is the structural representation of some same pole teeth in iron core of the present utility model;

Fig. 5 is the schematic diagram that pole of the present utility model tooth loads iron core outer ring;

Fig. 6 is hall device position view after brushless electric machine of the present utility model assembling.

In figure: the tooth of 1-pole, 2-iron core outer ring, 3-gap, 4-hall device, 5-PCB plate, 6-skeleton, 7-rotor, 11-first pole tooth, 12-second pole tooth, 13-the 3rd pole tooth, 14-the 4th pole tooth, 15-breach, 16-iron core cylindrical, 17-special construction.

Embodiment

For make those skilled in the art clearly with clear and definite the technical solution of the utility model, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.

As Fig. 2, shown in Fig. 3 and Fig. 6, a kind of brushless electric machine, comprise pcb board 5, iron core, rotor 7, skeleton 6, coil, hall device 4, described skeleton 6 is arranged on pcb board 5, described coil winding is on described skeleton 6 and form coil block, described hall device 4 is arranged on pcb board 5, described rotor 7 is arranged in iron core, the distance on top to pcb board 5 surface of described hall device 4 is the height of hall device 4, described iron core comprises iron core outer ring 2 and is arranged on the some poles tooth 1 in iron core outer ring 2, some described poles tooth 1 adopts identical size, identical pole tooth 1 is adopted to design, well solving motor that the different pole tooth of the employing that exists in prior art causes, to produce efficiency of assembling low, affect the problem that motor is self-align and start, greatly reduce the time that the some poles tooth comprising four pole teeth loads iron core outer ring 2, improve efficiency of assembling.

As shown in Fig. 2, Fig. 3 and Fig. 6, as a kind of preferred version of the present embodiment, described coil block to be set in described pole tooth 1 and to be connected with pcb board 5, gap 3 is equipped with between described pole tooth 1 and pole tooth, described hall device 4 is arranged at the below in described gap 3, and form hall sensing place, in order to the motor performance during iron core adopting same pole tooth can be adapted to well, the magnetic material thickness at hall sensing place must be increased simultaneously, to strengthen the magnetic property of induction region, ensure the normal performance of a kind of brushless electric machine of the present embodiment.

As shown in Figure 2 and Figure 6, as a kind of preferred version of the present embodiment, the height of described hall device 4 is no more than the height of each pole tooth 1 bottom surface distance pcb board 5, in order to ensure the performance of the brushless electric machine of the present embodiment, when motor assembles, pole tooth 1 is loaded in iron core outer ring 2, reduce the position of hall device 4, to adapt to the motor performance during iron core adopting same pole tooth.

Simultaneously, a kind of brushless electric machine entirety of the present embodiment adopts gradual change kind of air-gap design, the self-locating function of effective raising motor rotor, optimize the startability of motor, in order to adapt to adopt same pole tooth, also must will increase rotor thickness, rotor thickness increases 0.4-0.6mm than prior art simultaneously, the startability of guarantee motor and the self-locating function of raising motor rotor.

In sum, the utility model is by the design of some same pole teeth, well solve the production efficiency of assembling that the different pole tooth of the employing that exists in prior art causes low, affect the problem that motor is self-align and start, when motor assembles, reduce the position of Hall and rotor simultaneously, core design, to strengthen the magnetic property of induction region, is gradual change air gap by the magnetic material thickness at amendment rotor and hall sensing place, to improve the self-locating function of brushless electric machine rotor, optimize the startup of motor.

The above; be only the utility model patent preferred embodiment; but the protection range of the utility model patent is not limited thereto; anyly be familiar with those skilled in the art in the scope disclosed in the utility model patent; be equal to according to the technical scheme of the utility model patent and design thereof and replaced or change, all belonged to the protection range of the utility model patent.

Claims

1. a brushless electric machine, comprise pcb board (5), iron core, rotor (7), skeleton (6), coil, hall device (4), described skeleton (6) is arranged on pcb board (5), described coil winding is gone up at described skeleton (6) and forms coil block, described hall device (4) is arranged on pcb board (5), described rotor (7) is arranged in iron core, the distance on top to pcb board (5) surface of described hall device (4) is the height of hall device (4), it is characterized in that: described iron core comprises iron core outer ring (2) and is arranged on some poles tooth (1) in iron core outer ring (2), some described poles tooth (1) adopt identical size, described coil block to be set in described pole tooth (1) and to be connected with pcb board (5).

2. a kind of brushless electric machine according to claim 1, is characterized in that: be equipped with gap (3) between described pole tooth and pole tooth.

3. a kind of brushless electric machine according to claim 2, is characterized in that: described hall device (4) is arranged at the below of described gap (3), and forms hall sensing place.

4. a kind of brushless electric machine according to claim 1, is characterized in that: the height of described hall device (4) is no more than the height of each pole tooth (1) bottom surface distance pcb board (5).