WO2021110137A1 - Brushless direct-current electric motor - Google Patents

Brushless direct-current electric motor Download PDF

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Publication number
WO2021110137A1
WO2021110137A1 PCT/CN2020/133894 CN2020133894W WO2021110137A1 WO 2021110137 A1 WO2021110137 A1 WO 2021110137A1 CN 2020133894 W CN2020133894 W CN 2020133894W WO 2021110137 A1 WO2021110137 A1 WO 2021110137A1
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WO
WIPO (PCT)
Prior art keywords
winding
type
windings
stator
brushless motor
Prior art date
Application number
PCT/CN2020/133894
Other languages
French (fr)
Chinese (zh)
Inventor
张伟
汤建军
Original Assignee
苏州宝时得电动工具有限公司
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Publication of WO2021110137A1 publication Critical patent/WO2021110137A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles

Definitions

  • the invention relates to a DC brushless motor.
  • the outlet end of each winding of the DC brushless motor needs to be connected to an enameled wire first, and then electrically connected to the corresponding power cord.
  • the number of windings increases, the number of connections of the winding outlet ends must become Therefore, the dual-winding motor in the prior art has the problems of intricate wire ends and unsightly appearance.
  • the Chinese Patent Authorization Announcement No. CN 207117384 U discloses the brushless DC motor terminal.
  • the brushless DC motor terminal includes an insulating plate and a terminal arranged on the insulating plate. , Connect the power cord and the winding through the terminal, and the terminal is a whole.
  • this patent solves the problem of miscellaneous thread ends, it still needs to be wired 24 times. Since each enameled wire is electrically connected to the power cord, it needs to go through the steps of peeling the varnish, joining, and encapsulating and fixing. Therefore, the dual-winding motor in the prior art still has the problem of cumbersome wiring procedures and low motor manufacturing efficiency.
  • the purpose of the present invention is to provide a DC brushless motor, which has convenient wiring and can improve manufacturing efficiency.
  • a DC brushless motor including a rotor arranged to rotate around a central axis, a stator surrounding the rotor, and several types wound on the stator
  • the several types of windings include several first types of windings and several second types of windings.
  • the brushless DC motor also includes two sets of electrical connectors. Each type of winding corresponds to a set of electrical connectors, and each set of The electrical connector is first electrically connected to the corresponding winding and then electrically connected to the power line, the first type of winding is connected to an external first power source through a set of the electrical connectors, and the second winding is connected to the external power source through another set of electrical connectors.
  • the electrical connector is connected with the external second power source.
  • the electrical connector is a metal hook wire frame, and the metal hook wire frame is arranged on the outer side of the stator along the circumferential direction of the stator.
  • the two sets of metal hook wire frames are arranged on the outer side of the stator in a two-by-two symmetrical manner along the circumferential direction of the stator.
  • the motor further includes a housing covering the stator, an insulating member is arranged on the outer cylindrical surface of the housing, and the metal hook wire frame is inserted into the insulating member.
  • the electrical connector is a metal insert
  • the metal insert is divided into two groups, and the number of the metal insert in each group corresponds to the number of the first type windings or the number of the second type windings,
  • the two sets of metal inserts are respectively arranged on the two end faces of the DC brushless motor.
  • two sets of the metal inserts are symmetrically arranged on the two end faces of the DC brushless motor.
  • the electrical connector is a circuit board.
  • the circuit board is a first circuit board and a second circuit board.
  • the first circuit board is electrically connected to a plurality of first-type windings
  • the second circuit board is electrically connected to a plurality of second-type windings.
  • the first circuit board and the second circuit board are arranged oppositely on the two end faces of the DC brushless motor.
  • the circuit board includes a first-layer circuit board and a second-layer circuit board, which are electrically isolated from each other and are arranged on the same side end surface of the DC brushless motor.
  • the first-layer circuit board is electrically connected to a plurality of first-type windings.
  • the second-layer circuit board is electrically connected with the second-type winding.
  • the stator includes a ring yoke part surrounding the rotor and taking the central axis as the axis, and a plurality of teeth protruding from the ring yoke part toward the rotor.
  • the number of the teeth is the same as the sum of the number of the first type windings and the number of the second type windings.
  • the plurality of first-type windings and the plurality of second-type windings are wound on the plurality of teeth at intervals;
  • the plurality of windings of the first type are respectively sequentially wound on the adjacent teeth
  • the plurality of windings of the second type are respectively wound sequentially on the other adjacent teeth.
  • the arrangement of the first type winding, the second type winding and the tooth part is: each of the first type winding and the second type winding are wound on the same tooth part, and the first type winding is wound
  • the outer surface of the stator tooth is close to the outer surface of the stator tooth
  • the second type winding is wound on the first type of winding and is arranged away from the outer surface of the stator tooth.
  • the number of turns of each winding of the first type winding is different from the number of turns of each winding of the second type winding, or the wire diameter of each winding of the first type winding is different from that of the first type winding.
  • the wire diameter of each winding of the two types of windings is different.
  • the number of the plurality of first-type windings is three, and the number of the plurality of second-type windings is three.
  • the first external power source is a DC power source
  • the second external power source is an AC power source
  • the beneficial effects of the present invention are: by providing at least two sets of electrical connectors in the brushless motor, which are connected to different types of windings, the brushless motor can be connected to different external power sources, and the internal wiring process is simple, the manufacturing efficiency is high, and the To avoid unnecessary increase in manufacturing costs.
  • the heat dissipation performance of the motor is optimized, and the traditional enameled wire connection method is discarded by using electrical connectors, and unnecessary increase in the overall volume of the motor is avoided.
  • the DC brushless motor of the present invention is particularly suitable for application in hand tools that require a small motor volume.
  • Figure 1 is a schematic diagram of the structure of the first embodiment of the present invention.
  • Fig. 2 is a schematic diagram of the structure of the two types of windings of the DC brushless motor wound on the stator in Fig. 1;
  • Fig. 3 is a schematic diagram of the structure of the metal hook wire frame in Fig. 1;
  • Figure 5 is a schematic diagram of the structure of the two types of windings of the DC brushless motor wound on the stator in Figure 4;
  • Fig. 6 is a schematic structural diagram of a third embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the structure of the two types of windings of the DC brushless motor in FIG. 6 wound on the stator.
  • the brushless DC motor shown in the first embodiment of the present invention includes a rotor (not shown) that is set to rotate around a central axis, a stator that is arranged on the outside of the rotor, and is wound on Several types of windings 2 on the stator 1, at least two sets of electrical connectors 3, and a casing 4 covering the stator 1.
  • Each type of winding 2 corresponds to a group of electrical connectors 3.
  • Each group of electrical connectors 3 is first electrically connected to the corresponding winding 2 and then electrically connected to the power cord 100.
  • the power cord 100 is used to selectively connect at least two external power sources. At least one of the at least two external power sources includes an AC power source and a DC power source.
  • the stator 1 is surrounded by a ring yoke 11 with a central axis as the axis, and a plurality of teeth 12 protruding from the ring yoke 11 in the direction of the rotor.
  • the several types of windings 2 include several first types of windings and several second types of windings.
  • the first type of windings are electrically connected to a DC power source through a power cord 100
  • the second type of windings are connected to a DC power source through the power cord 100.
  • the power output requirement of a motor connected to an AC power supply is higher than that of a motor connected to a DC power supply.
  • the volume of the second type windings occupies more than half of the several windings 2 in the motor.
  • the sum of the number of the first type windings and the number of the second type windings is a multiple of 6, and the number of the teeth 12 is equal to the number of The number of windings of the first type is the same as the sum of the number of windings of the second type.
  • the number of the plurality of first-type windings is three, and the number of the plurality of second-type windings is three, and correspondingly, the number of the teeth 12 is six.
  • the first type of winding includes a first winding with two first terminals U1, a second winding with two second terminals W1, and a second winding with two third terminals V1.
  • the third winding, the first winding, the second winding and the third winding are respectively connected to the external power line 100, and are used to generate the first magnetic field under the action of the DC power supply, the first winding, the second winding and the third winding They are connected to the three-phase power supply through the power line 100 to access different voltages.
  • the three second type windings 2 include a fourth winding with two fourth terminal U2, a fifth winding with two fifth terminal W2, and a sixth winding with two sixth terminal V2.
  • the fourth winding, the fifth winding and the sixth winding are respectively connected to an external power line 100 to generate a second magnetic field under the action of an alternating current power source.
  • the fourth winding, the fifth winding and the sixth winding respectively pass through the power line 100 is connected to the three-phase power supply to access different voltages.
  • the first type of winding 2 and the second type of winding 2 are overlapped and wound on the tooth portion 12.
  • the first winding, the second winding and the third winding are all wound in turn on two oppositely arranged along the central axis direction.
  • the fourth winding, the fifth winding, and the sixth winding are all wound on two different teeth 12 opposite to each other along the direction of the central axis.
  • the teeth 12 include opposite first teeth The part 121 and the second tooth part 122, the third tooth part 123 and the fourth tooth part 124 disposed oppositely, the fifth tooth part 125 and the sixth tooth part 126 disposed oppositely.
  • the first winding is wound on the oppositely arranged first tooth 121 and the second tooth 122 through a winding wire, leading to the first terminal U1;
  • the second winding is wound on the oppositely arranged third tooth through a winding wire Part 123 and the fourth tooth part 124 lead to the second terminal W1;
  • the third winding is wound on the oppositely arranged fifth tooth part 125 and the sixth tooth part 126 through a winding, leading to the third terminal V1.
  • the fourth winding overlaps the first winding on the same tooth part, and is wound on the oppositely arranged first tooth part 121 and the second tooth part 122 through a winding wire, leading to the fourth terminal U2; the fifth winding and the first The two windings overlap on the same tooth part, and are wound on the oppositely arranged third tooth part 123 and the fourth tooth part 124 through a winding wire, leading to the second terminal W2; the sixth winding and the third winding overlap in the same The tooth part is wound on the opposite fifth tooth part 125 and the sixth tooth part 126 by a winding wire, leading to the third terminal V2.
  • the windings of the first type winding and the second type winding are overlapped and wound on the same tooth to form a double-layer concentric structure.
  • the inner core is the stator tooth 12, and the inner layer is close to the outer surface of the stator tooth 12.
  • the outer layer is far away from the outer surface of the stator teeth 12, forming an onion-like structure, the first type of winding is arranged on the inner layer, and the second type of winding is arranged on the outer layer.
  • the windings wound on the stator include the coil part wound on the stator teeth and located in the stator slot and arranged in parallel along the motor axis, and the coil part wound on the stator teeth and located at the end of the stator. For the stator teeth, the coils at the end of the stator do not perform work.
  • the windings arranged in the inner layer are located at the stator end.
  • the coil part of the outer layer is less than the coil part of the winding located at the end of the stator. Therefore, the power loss of the first type of winding connected to the DC power supply in the inner layer is small. Because the power of the DC power supply is limited, it can work continuously. The maximum duration is shorter than the duration of the AC power supply, so the heat generated due to the power loss during the working process is relatively low.
  • the first type windings connected to the DC power supply are arranged in the inner layer and dissipate heat through the heat conduction of the stator teeth, and the second type windings are arranged in the outer layer and dissipate heat through the heat conduction of the air.
  • the heat dissipation performance of the motor is optimal.
  • the electrical connector 3 is a metal hook wire rack 3.
  • the number of the metal hook wire racks 3 is set to two groups, namely the first metal hook wire rack and the second metal hook wire rack.
  • the two sets of metal hook wire racks 3 have the same structure.
  • the structure of the first metal hook wire rack is described in detail below by taking the first metal hook wire rack as an example.
  • a first connecting portion 32 for electrically connecting with the winding 2 and a second connecting portion 33 for electrically connecting with the power cord 100 are formed at both ends of the board body portion 31.
  • the first connecting portion 32 is formed by bending from the board body portion 31, the second connecting portion 33 is tilted outward from the board body portion 31, and the second connecting portion 33 is formed with a through hole 34 for inserting the power cord 100.
  • the two sets of metal hook wire frames 3 are arranged on the outer side of the stator 1 in a two-by-two symmetrical manner along the circumferential direction of the stator 1.
  • the two sets of metal hook wire frames 3 can also be arranged asymmetrically on the outside of the stator 1, and the two sets of metal hook wire frames 3 are only arranged on the outside of the stator 1 at a certain angle.
  • an insulating member 41 is installed on the housing 4 of the DC brushless motor, the number of insulating members 41 is two, and the metal hook wire frame 3 is inserted on the insulating member 41, and each insulating member 41 is installed There is a set of metal hook wire rack 3.
  • the first metal hook wire frame is installed on one of the insulating members 41, and the second metal hook wire frame is installed on the other insulating member 41.
  • Each insulating member 41 includes a body 411 and three insertion grooves 412 formed on the body 411 for inserting the metal hook wire frame 3.
  • Two insulators 41 are respectively arranged symmetrically on both sides of the DC brushless motor. In this embodiment, the two insulators 41 are installed on the outside of the housing 20.
  • the assembling method between the insulating member 41 and the housing 20 may be as follows: the main body 411 of the insulating member 41 protrudes outward to form a clamping block 413, and the housing 20 is formed with a clamping groove matching the clamping block 413 (Not shown).
  • the shape of the metal hook wire rack 3 is curved. Through this design, the shape is smooth, and the wiring is neatly arranged and will not adhere to each other. Therefore, in actual work, several metal hook wire racks 3 are used. The combined use facilitates automated production and manufacturing. At the same time, since the metal hook wire frame 3 is installed on the outside of the housing 20 through the insulating member 41, the axial size of the DC brushless motor is shortened.
  • the basic structure of the brushless DC motor shown in the second embodiment is the same as that of the first embodiment.
  • the difference lies in the winding wiring method and the electrical connector 5.
  • This embodiment adopts the following Method: A number of first type windings and a number of second type windings are wound on a number of teeth 12 at intervals, that is, only one winding is wound on each tooth 12, and the windings wound on adjacent teeth 12 are different types of windings.
  • the six teeth 12 are respectively wound with a first winding with a first terminal U1, a fourth winding with two fourth terminal U2, and a third winding with two third terminal V1.
  • the electrical connector 5 is a metal insert 5.
  • the top end of each metal insert 5 is provided with a hole 51 for connecting with the power cord 100, and the tail end of the metal insert 5 is a circular sheet body connected to the winding in a plug-in manner.
  • the metal insert 5 is fixed by providing a card slot (not labeled) on the housing 4 of the DC brushless motor.
  • the brushless DC motor adopting this scheme is convenient for manufacturing automation.
  • the number of the metal inserts 5 is set corresponding to the sum of the number of the first type of windings and the number of the second type of windings, that is, in this embodiment, the number of the metal inserts 5 is 6, and the number of metal inserts is divided into 6
  • There are two sets, two sets of metal inserts 5 are symmetrically arranged on the two ends of the housing 4.
  • the three metal inserts 5 on each end surface are evenly arranged along the circumferential direction of the end surface and close to the outer circumference of the end surface. In other embodiments of the present application, the two sets of metal inserts 5 may also be asymmetrical and form a certain angle.
  • the basic structure of the brushless DC motor shown in the third embodiment is the same as that of the first embodiment, except that the winding wiring method and the electrical connector 6 are different.
  • This embodiment adopts the following method: a number of windings of the first type are respectively wound in sequence on several adjacent teeth 12, and several windings of the second type are wound in sequence on other adjacent teeth 12 respectively, that is, each Only one winding is wound on the tooth 12, the windings wound on the three adjacent teeth 12 are of the same type, and the windings wound on the three adjacent teeth 12 are of another type.
  • three adjacent teeth 12 are respectively wound with a first winding with a first terminal U1, a second winding with two second terminals W1, and a third winding with two third terminals V1. Winding, the other three adjacent teeth 12 are respectively wound with a fourth winding with two fourth terminal U2, a fifth winding with two fifth terminal W2 and two sixth terminal The sixth winding of V2.
  • the electrical connector 6 is a circuit board 6, specifically a flexible circuit board (PCB board).
  • PCB board flexible circuit board
  • the first circuit board is electrically connected to the first winding, the second winding and the third winding, respectively, and the second circuit board is respectively It is electrically connected with the fourth winding, the fifth winding and the sixth winding.
  • One end of the circuit board 6 is connected to several types of windings in a plug-in manner, and the other end is provided with a wiring hole 21, and is connected to the power cord 100 through the wiring hole 21.
  • the circuit board 6 is fixed on the outside of the housing 4 by arranging a buckle assembly (not labeled) on the housing 4 of the DC brushless motor.
  • the circuit board 6 in this embodiment can also be made into a multi-layer board structure.
  • the circuit board 6 includes a first-layer circuit board and The second layer circuit board, the first layer circuit board and the second layer circuit board are electrically isolated from each other, the first layer circuit board is electrically connected to the first winding, the second winding and the third winding, and the second layer circuit board
  • the circuit board 6 is electrically connected to the fourth winding, the fifth winding and the sixth winding respectively.
  • the circuit board 6 is fixed on the outside of the housing 4 by arranging a snap assembly (not labeled) on the housing 4 of the DC brushless motor, and is arranged on the housing 4 The end face of one side of the body 4.
  • winding wiring modes in the above three embodiments can be replaced with each other.
  • the number of corresponding metal hooks, metal inserts and circuit boards can also increase accordingly.
  • the brushless DC motor of the above embodiment solves the disadvantages of the complicated connection between the power cord wiring of the DC brushless motor and the terminal of the winding in the prior art, and it is difficult to automate the production and manufacture.
  • At least two sets of electrical connectors are provided, and each electrical connector is first electrically connected to the corresponding winding and then electrically connected to the power cord, reducing the wiring process, thereby improving manufacturing efficiency and helping to reduce costs.
  • the enameled wire connection method is abandoned, and the overall volume of the DC brushless motor is also reduced, so that the DC brushless motor of the present invention is particularly suitable for use in holding tools.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

A brushless direct-current electric motor comprising a rotor arranged to rotate around a central axis, a stator (1) arranged on the outer side of the rotor in a surrounding manner and a plurality of types of windings (2) wound on the stator (1), wherein the plurality of types of windings (2) comprise multiple first type windings and multiple second type windings; and the brushless direct-current electric motor further comprises two sets of electric connecting members (3), wherein each type of windings (2) corresponds to one set of electric connecting members (3), and each set of electric connecting members (3) are electrically connected with the corresponding windings (2) first and then are electrically connected with power lines (100). According to the brushless direct-current electric motor, the wiring process can be reduced, such that the manufacturing efficiency is improved, reduction of cost is facilitated, reduction of the overall size of the brushless direct-current electric motor is facilitated, and the brushless direct-current electric motor is particularly suitable for being applied to a holding tool.

Description

直流无刷电机Brushless DC motor
本申请要求了申请日为2019年12月05日，申请号为201911234028.0和201922157188.1的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent applications whose application date is December 05, 2019, and the application numbers are 201911234028.0 and 201922157188.1, the entire contents of which are incorporated into this application by reference.
技术领域Technical field
本发明涉及一种直流无刷电机。The invention relates to a DC brushless motor.
背景技术Background technique
近年来随着电池技术的发展，使得由电池供电的手持工具，如电钻、研磨机、圆锯变得越来越方便携带。但由于电池电量有限，在电池电量用尽或故障时，则无法正常使用。考虑电机是电动工具的动力源，为此，现有技术中提供了一种具有两副绕组的直流无刷电机，使用该双绕组电机的电动工具既能使用交流电源供电，又能使用电池供电，很好地解决了电池电量用尽或故障时电池供电的工具不可用的问题。In recent years, with the development of battery technology, battery-powered hand-held tools such as electric drills, grinders, and circular saws have become more and more convenient to carry. However, due to the limited battery power, it cannot be used normally when the battery power is exhausted or malfunctions. Considering that the motor is the power source of the electric tool, the prior art provides a DC brushless motor with two secondary windings. The electric tool using the dual-winding motor can be powered by AC power or battery. , It is a good solution to the problem that battery-powered tools are unavailable when the battery is exhausted or malfunctions.
通常，直流无刷电机的每个绕组的接出端需要先与一根漆包线连接，然后再与对应的一根电源线电性连接，随着绕组数量的增加，绕组接出端的接线次数必然成倍增加，因而，现有技术中的双绕组电机存在线头错杂、不美观的问题。Generally, the outlet end of each winding of the DC brushless motor needs to be connected to an enameled wire first, and then electrically connected to the corresponding power cord. As the number of windings increases, the number of connections of the winding outlet ends must become Therefore, the dual-winding motor in the prior art has the problems of intricate wire ends and unsightly appearance.
为了解决直流无刷电机的美观问题，中国专利授权公告第CN 207117384 U号公开了直流无刷电机接线端子，该直流无刷电机接线端子包括绝缘板及凸立式布置在绝缘板上的接线柱，通过接线柱连接电源线与绕组，接线端子为一个整体。虽然该专利解决了线头错杂的问题，但是，其仍然需要接线24次。由于每根漆包线与电源线的电连接，均需经过剥漆皮、接合、包胶固定等步骤，因而，现有技术中的双绕组电机仍然存在接线工序繁琐，电机制造效率低的问题。In order to solve the aesthetic problem of the brushless DC motor, the Chinese Patent Authorization Announcement No. CN 207117384 U discloses the brushless DC motor terminal. The brushless DC motor terminal includes an insulating plate and a terminal arranged on the insulating plate. , Connect the power cord and the winding through the terminal, and the terminal is a whole. Although this patent solves the problem of miscellaneous thread ends, it still needs to be wired 24 times. Since each enameled wire is electrically connected to the power cord, it needs to go through the steps of peeling the varnish, joining, and encapsulating and fixing. Therefore, the dual-winding motor in the prior art still has the problem of cumbersome wiring procedures and low motor manufacturing efficiency.
发明内容Summary of the invention
本发明的目的在于提供一种直流无刷电机，该直流无刷电机接线方便，且能提高制造效率。The purpose of the present invention is to provide a DC brushless motor, which has convenient wiring and can improve manufacturing efficiency.
为达到上述目的，本发明提供如下技术方案：一种直流无刷电机，包括被设置为绕一中心轴线转动的转子、围设在所述转子外侧的定子以及缠绕在所述定子上的若干类绕组，若干类绕组包括若干第一类绕组和若干第二类绕组，所述直流无刷电机还包括两组电连接件，每类所述绕组对应一组所述电连接件，每组所述电连接件先与对应的绕组电性连接再电性连接于电源线，所述第一类绕组通过一组所述电连接件与外部第一电源连接，所述第二绕组通过另一组所述电连接件与外部第二电源连接。In order to achieve the above objective, the present invention provides the following technical solutions: a DC brushless motor, including a rotor arranged to rotate around a central axis, a stator surrounding the rotor, and several types wound on the stator The several types of windings include several first types of windings and several second types of windings. The brushless DC motor also includes two sets of electrical connectors. Each type of winding corresponds to a set of electrical connectors, and each set of The electrical connector is first electrically connected to the corresponding winding and then electrically connected to the power line, the first type of winding is connected to an external first power source through a set of the electrical connectors, and the second winding is connected to the external power source through another set of electrical connectors. The electrical connector is connected with the external second power source.
进一步地，所述电连接件为金属钩线架，所述金属钩线架沿所述定子的周向上布置在所述定子的外侧。Further, the electrical connector is a metal hook wire frame, and the metal hook wire frame is arranged on the outer side of the stator along the circumferential direction of the stator.
进一步地，两组所述金属钩线架沿所述定子的周向上呈两两对称的方式布置在所述定子的外侧。进一步地，所述电机还包括包覆所述定子的外壳，所述外壳的外圆柱面上设置有绝缘件，所述金属钩线架插接在所述绝缘件上。Further, the two sets of metal hook wire frames are arranged on the outer side of the stator in a two-by-two symmetrical manner along the circumferential direction of the stator. Further, the motor further includes a housing covering the stator, an insulating member is arranged on the outer cylindrical surface of the housing, and the metal hook wire frame is inserted into the insulating member.
进一步地，所述电连接件为金属插片，所述金属插片分成两组，每组所述金属插片的数量对应所述第一类绕组的个数或第二类绕组的个数，两组所述金属插片分别设置在所述直流无刷电机的两端面上。Further, the electrical connector is a metal insert, the metal insert is divided into two groups, and the number of the metal insert in each group corresponds to the number of the first type windings or the number of the second type windings, The two sets of metal inserts are respectively arranged on the two end faces of the DC brushless motor.
进一步地，两组所述金属插片对称设置在所述直流无刷电机的两端面上。Further, two sets of the metal inserts are symmetrically arranged on the two end faces of the DC brushless motor.
进一步地，所述电连接件为电路板。Further, the electrical connector is a circuit board.
进一步地，所述电路板为第一电路板和第二电路板，所述第一电路板分别与若干第一类绕组电性连接，所述第二电路板分别与若干第二类绕组电性连接，所述第一电路板、第二电路板相对设置在所述直流无刷电机的两端面上。Further, the circuit board is a first circuit board and a second circuit board. The first circuit board is electrically connected to a plurality of first-type windings, and the second circuit board is electrically connected to a plurality of second-type windings. In connection, the first circuit board and the second circuit board are arranged oppositely on the two end faces of the DC brushless motor.
进一步地，所述电路板包括第一层电路板和第二层电路板，相互电隔离，设置在所述直流无刷电机的同一侧端面上，第一层电路板与若干第一类绕组电性连接，第二层电路板与第二类绕组电性连接。Further, the circuit board includes a first-layer circuit board and a second-layer circuit board, which are electrically isolated from each other and are arranged on the same side end surface of the DC brushless motor. The first-layer circuit board is electrically connected to a plurality of first-type windings. The second-layer circuit board is electrically connected with the second-type winding.
进一步地，所述定子包括围设在所述转子外侧且以所述中心轴线为轴心的环轭部和自所述环轭部上朝所述转子方向突伸形成的若干齿部，所述若干齿部的数量与所述若干第一类绕组的个数和若干所述第二类绕组的个数的总和相同。Further, the stator includes a ring yoke part surrounding the rotor and taking the central axis as the axis, and a plurality of teeth protruding from the ring yoke part toward the rotor. The number of the teeth is the same as the sum of the number of the first type windings and the number of the second type windings.
进一步地，所述第一类绕组、第二类绕组与齿部的布置方式为：Further, the arrangement of the first type winding, the second type winding and the teeth is as follows:
所述若干第一类绕组、所述若干第二类绕组呈间隔缠绕在所述若干齿部上；The plurality of first-type windings and the plurality of second-type windings are wound on the plurality of teeth at intervals;
或，所述若干第一类绕组缠绕分别依次顺序缠绕在相邻的所述若干齿部上，所述若干第二类绕组分别依次顺序缠绕在相邻的其他若干齿部上。Or, the plurality of windings of the first type are respectively sequentially wound on the adjacent teeth, and the plurality of windings of the second type are respectively wound sequentially on the other adjacent teeth.
进一步地，所述第一类绕组、第二类绕组与齿部的布置方式为：每个所述第一类绕组和第二类绕组重叠缠绕在同一所述齿部上，第一类绕组缠绕在定子齿部的外表面上靠近定子齿部外表面，第二类绕组缠绕在第一类绕组上远离定子齿部的外表面设置。Further, the arrangement of the first type winding, the second type winding and the tooth part is: each of the first type winding and the second type winding are wound on the same tooth part, and the first type winding is wound The outer surface of the stator tooth is close to the outer surface of the stator tooth, and the second type winding is wound on the first type of winding and is arranged away from the outer surface of the stator tooth.
进一步地，所述第一类绕组的每个绕组的匝数与所述第二类绕组的每个绕组的匝数不同，或所述第一类绕组的每个绕组的线径与所述第二类绕组的每个绕组的线径不同。Further, the number of turns of each winding of the first type winding is different from the number of turns of each winding of the second type winding, or the wire diameter of each winding of the first type winding is different from that of the first type winding. The wire diameter of each winding of the two types of windings is different.
进一步地，所述若干第一类绕组的数量为3个，所述若干第二类绕组的数量为3个。Further, the number of the plurality of first-type windings is three, and the number of the plurality of second-type windings is three.
进一步地，所述第一外部电源为直流电源，所述第二外部电源为交流电源。Further, the first external power source is a DC power source, and the second external power source is an AC power source.
本发明的有益效果在于：通过在无刷电机内设置至少两组电连接件，分别与不同类的绕组连接，无刷电机可连接不同的外部电源，且内部接线工序简单，制造效率高，避免了不必要的制造成本的增大。此外，通过优化线圈绕线方式，优化了电机散热性能，通过采用电连接件，摒弃了传统的漆包线的连接方式，避免了电机整体体积的不必要的增大。使得本发明的直流无刷电机尤其适合应用于要求电机体积小的手持工具中。The beneficial effects of the present invention are: by providing at least two sets of electrical connectors in the brushless motor, which are connected to different types of windings, the brushless motor can be connected to different external power sources, and the internal wiring process is simple, the manufacturing efficiency is high, and the To avoid unnecessary increase in manufacturing costs. In addition, by optimizing the coil winding method, the heat dissipation performance of the motor is optimized, and the traditional enameled wire connection method is discarded by using electrical connectors, and unnecessary increase in the overall volume of the motor is avoided. The DC brushless motor of the present invention is particularly suitable for application in hand tools that require a small motor volume.
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，并可依照说明书的内容予以实施，以下以本发明的较佳实施例并配合附图详细说明如后。The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it in accordance with the content of the description, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
附图说明Description of the drawings
图1为本发明的第一实施例结构示意图；Figure 1 is a schematic diagram of the structure of the first embodiment of the present invention;
图2为图1中直流无刷电机两类绕组缠绕在定子上的结构示意图；Fig. 2 is a schematic diagram of the structure of the two types of windings of the DC brushless motor wound on the stator in Fig. 1;
图3为图1中金属钩线架结构示意图；Fig. 3 is a schematic diagram of the structure of the metal hook wire frame in Fig. 1;
图4为本发明的第二实施例结构示意图；4 is a schematic structural diagram of the second embodiment of the present invention;
图5为图4中直流无刷电机两类绕组缠绕在定子上结构示意图；Figure 5 is a schematic diagram of the structure of the two types of windings of the DC brushless motor wound on the stator in Figure 4;
图6为本发明的第三实施例结构示意图；Fig. 6 is a schematic structural diagram of a third embodiment of the present invention;
图7为图6中直流无刷电机两类绕组缠绕在定子上的结构示意图。FIG. 7 is a schematic diagram of the structure of the two types of windings of the DC brushless motor in FIG. 6 wound on the stator.
具体实施方式Detailed ways
下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood in specific situations.
此外，下面所描述的本发明不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
请参见图1和图2，本发明的第一实施例所示的直流无刷电机包括被设置为一绕中心轴线转动的转子(未图示)、围设在转子外侧的定子1、缠绕在定子1上的若干类绕组2、至少两组电连接件3、以及包覆定子1的外壳4。每类绕组2对应一组电连接件3，每组电连接件3先与对应的绕组2电性连接再电性连接于电源线100，电源线100用于选择性地连接至少两种外部电源中的至少一种，至少两种外部电源包括交流电源和直流电源。该定子1围设在转子外侧且以中心轴线为轴心的环轭部11和自环轭部11上朝转子方向突伸形成的若干齿部12。若干类绕组2包括若干第一类绕组和若干第二类绕组，在其中一个实施中，第一类绕组通过电源线100电性连接至直流电源，第二类绕组通过电源线100连 接直流电源。通常，连接交流电源的电机的功率输出要求高于连接直流电源的电机，为满足功率要求，优选地，第二类绕组的体积占电机内若干绕组2的一半以上。1 and 2, the brushless DC motor shown in the first embodiment of the present invention includes a rotor (not shown) that is set to rotate around a central axis, a stator that is arranged on the outside of the rotor, and is wound on Several types of windings 2 on the stator 1, at least two sets of electrical connectors 3, and a casing 4 covering the stator 1. Each type of winding 2 corresponds to a group of electrical connectors 3. Each group of electrical connectors 3 is first electrically connected to the corresponding winding 2 and then electrically connected to the power cord 100. The power cord 100 is used to selectively connect at least two external power sources. At least one of the at least two external power sources includes an AC power source and a DC power source. The stator 1 is surrounded by a ring yoke 11 with a central axis as the axis, and a plurality of teeth 12 protruding from the ring yoke 11 in the direction of the rotor. The several types of windings 2 include several first types of windings and several second types of windings. In one implementation, the first type of windings are electrically connected to a DC power source through a power cord 100, and the second type of windings are connected to a DC power source through the power cord 100. Generally, the power output requirement of a motor connected to an AC power supply is higher than that of a motor connected to a DC power supply. In order to meet the power requirement, preferably, the volume of the second type windings occupies more than half of the several windings 2 in the motor.
为优化电机的输出性能，优选地，在其中一个实施例中，上述若干第一类绕组的个数与若干第二类绕组的个数之和为6的倍数，若干齿部12的数量与若干第一类绕组的个数和若干第二类绕组的个数的总和相同。本实施例中，该若干第一类绕组的数量为3个，若干第二类绕组的数量为3个，对应的，齿部12的数量为6个。具体的，请参见图2，第一类绕组包括具有两个第一接出端U1的第一绕组、具有两个第二接出端W1的第二绕组和具有两个第三接出端V1的第三绕组，该第一绕组、第二绕组和第三绕组分别与外部的电源线100连接，用于在直流电源的作用下产生第一磁场，第一绕组、第二绕组和第三绕组分别通过电源线100与电源的三相连接以接入不同的电压。3个第二类绕组2包括具有两个第四接出端U2的第四绕组、具有两个第五接出端W2的第五绕组和具有两个第六接出端V2的第六绕组。该第四绕组、第五绕组和第六绕组分别与外部的电源线100连接，用以在交流电源的作用下产生第二磁场，该第四绕组、第五绕组和第六绕组分别通过电源线100与电源的三相连接以接入不同的电压。本实施例中，第一类绕组2和第二类绕组2重叠缠绕在齿部12上，详细的，第一绕组、第二绕组和第三绕组均依次缠绕在沿中心轴线方向相对设置的两个不同齿部12上；第四绕组、第五绕组和第六绕组均依次缠绕在沿中心轴线方向相对设置的两个不同齿部12上，如，该齿部12包括相对设置的第一齿部121和第二齿部122、相对设置的第三齿部123和第四齿部124、相对设置的第五齿部125和第六齿部126。第一绕组通过一跟绕线缠绕在相对设置的第一齿部121和第二齿部122上，引出第一接出端U1；第二绕组通过一跟绕线缠绕在相对设置的第三齿部123和第四齿部124上，引出第二接出端W1；第三绕组通过一根绕线缠绕在相对设置的第五齿部125和第六齿部126上，引出第三接出端V1。第四绕组与第一绕组重叠在相同齿部上，通过一跟绕线缠绕在相对设置的第一齿部121和第二齿部122上，引出第四接出端U2；第五绕组与第二绕组重叠在相同齿部上，通过一跟绕线缠绕在相对设置的第三齿部123和第四齿部124上， 引出第二接出端W2；第六绕组与第三绕组重叠在相同齿部上，通过一根绕线缠绕在相对设置的第五齿部125和第六齿部126上，引出第三接出端V2。本实施例中，第一类绕组与第二类绕组的各个绕线对应重叠缠绕在同一齿部，形成双层同芯结构，内芯为定子齿部12，内层靠近定子齿部12外表面，外层远离定子齿部12的外表面，形成类似洋葱的结构，第一类绕组设置在内层，第二类绕组设置在外层。In order to optimize the output performance of the motor, preferably, in one of the embodiments, the sum of the number of the first type windings and the number of the second type windings is a multiple of 6, and the number of the teeth 12 is equal to the number of The number of windings of the first type is the same as the sum of the number of windings of the second type. In this embodiment, the number of the plurality of first-type windings is three, and the number of the plurality of second-type windings is three, and correspondingly, the number of the teeth 12 is six. Specifically, referring to FIG. 2, the first type of winding includes a first winding with two first terminals U1, a second winding with two second terminals W1, and a second winding with two third terminals V1. The third winding, the first winding, the second winding and the third winding are respectively connected to the external power line 100, and are used to generate the first magnetic field under the action of the DC power supply, the first winding, the second winding and the third winding They are connected to the three-phase power supply through the power line 100 to access different voltages. The three second type windings 2 include a fourth winding with two fourth terminal U2, a fifth winding with two fifth terminal W2, and a sixth winding with two sixth terminal V2. The fourth winding, the fifth winding and the sixth winding are respectively connected to an external power line 100 to generate a second magnetic field under the action of an alternating current power source. The fourth winding, the fifth winding and the sixth winding respectively pass through the power line 100 is connected to the three-phase power supply to access different voltages. In this embodiment, the first type of winding 2 and the second type of winding 2 are overlapped and wound on the tooth portion 12. In detail, the first winding, the second winding and the third winding are all wound in turn on two oppositely arranged along the central axis direction. The fourth winding, the fifth winding, and the sixth winding are all wound on two different teeth 12 opposite to each other along the direction of the central axis. For example, the teeth 12 include opposite first teeth The part 121 and the second tooth part 122, the third tooth part 123 and the fourth tooth part 124 disposed oppositely, the fifth tooth part 125 and the sixth tooth part 126 disposed oppositely. The first winding is wound on the oppositely arranged first tooth 121 and the second tooth 122 through a winding wire, leading to the first terminal U1; the second winding is wound on the oppositely arranged third tooth through a winding wire Part 123 and the fourth tooth part 124 lead to the second terminal W1; the third winding is wound on the oppositely arranged fifth tooth part 125 and the sixth tooth part 126 through a winding, leading to the third terminal V1. The fourth winding overlaps the first winding on the same tooth part, and is wound on the oppositely arranged first tooth part 121 and the second tooth part 122 through a winding wire, leading to the fourth terminal U2; the fifth winding and the first The two windings overlap on the same tooth part, and are wound on the oppositely arranged third tooth part 123 and the fourth tooth part 124 through a winding wire, leading to the second terminal W2; the sixth winding and the third winding overlap in the same The tooth part is wound on the opposite fifth tooth part 125 and the sixth tooth part 126 by a winding wire, leading to the third terminal V2. In this embodiment, the windings of the first type winding and the second type winding are overlapped and wound on the same tooth to form a double-layer concentric structure. The inner core is the stator tooth 12, and the inner layer is close to the outer surface of the stator tooth 12. , The outer layer is far away from the outer surface of the stator teeth 12, forming an onion-like structure, the first type of winding is arranged on the inner layer, and the second type of winding is arranged on the outer layer.
无刷电机工作过程中，对于缠绕在定子上的绕组来说，仅沿电机轴向平行设置的线圈在电流的作用下产生的磁力才能做功，位于定子端部两侧的线圈部分不做工。本实施例中，缠绕在定子上的绕组包括缠绕在定子齿部，位于定子槽内沿电机轴向平行设置的线圈部分，以及缠绕在定子齿部，位于定子端部的线圈部分，由于缠绕在定子齿部，位于定子端部的线圈部分不做功，对于上述重叠缠绕在相同齿部形成双层同芯结构的第一类绕组和第二类绕组来说，设置在内层的绕组位于定子端部的线圈部分少于设置在外层的绕组位于定子端部的线圈部分，因此，设置在内层连接直流电源的第一类绕组的电能损耗较小，由于直流电源的电力有限，可持续工作的最高时长较交流电源的时长较短，因而工作过程中由于电能损耗导致的发热量相对较低。将连接直流电源的第一类绕组设置在内层，通过定子齿部的热传导进行散热，第二类绕组设置在外层，通过空气的热传导进行散热，采用上述双层同芯结构的缠绕方式，使得电机的散热性能最优。During the working process of the brushless motor, for the windings wound on the stator, only the magnetic force generated by the coils arranged in parallel along the axis of the motor under the action of the current can do work, and the coils on both sides of the stator end do not work. In this embodiment, the windings wound on the stator include the coil part wound on the stator teeth and located in the stator slot and arranged in parallel along the motor axis, and the coil part wound on the stator teeth and located at the end of the stator. For the stator teeth, the coils at the end of the stator do not perform work. For the first and second types of windings that are overlapped and wound on the same teeth to form a double-layer concentric structure, the windings arranged in the inner layer are located at the stator end. The coil part of the outer layer is less than the coil part of the winding located at the end of the stator. Therefore, the power loss of the first type of winding connected to the DC power supply in the inner layer is small. Because the power of the DC power supply is limited, it can work continuously. The maximum duration is shorter than the duration of the AC power supply, so the heat generated due to the power loss during the working process is relatively low. The first type windings connected to the DC power supply are arranged in the inner layer and dissipate heat through the heat conduction of the stator teeth, and the second type windings are arranged in the outer layer and dissipate heat through the heat conduction of the air. The heat dissipation performance of the motor is optimal.
本实施例中，电连接件3为金属钩线架3。该金属钩线架3的数量设置为两组，分别为第一金属钩线架和第二金属钩线架。本实施例中，两组金属钩线架3的结构相同，下面以第一金属钩线架为例详细说明其结构，请参见图3，第一金属钩线架包括板体部31、以及分别形成在板体部31两端的用以与绕组2电性连接的第一连接部32和用以与电源线100电性连接的第二连接部33。第一连接部32为自板体部31弯折形成，第二连接部33自板体部31向外翘起，第二连接部33上形成有用以插接电源线100的通孔34。两组金属钩线架3沿定子1的周向上呈两两对称的方式布置在定子1的外侧。在其他实施例中，两组金属钩线架3也可以不对称的设置在定子1的外侧，两组金属钩线架3仅是成一定角度的设 置在定子1的外侧。本实施例中，直流无刷电机的壳体4上安装有绝缘件41，绝缘件41的数量为两个，金属钩线架3插接在绝缘件41上，其中每个绝缘件41上安装有一组金属钩线架3。具体的，第一金属钩线架安装在其中一个绝缘件41上，第二金属钩线架安装在另一个绝缘件41上。每个绝缘件41包括本体411和形成在本体411上的三个用以插接金属钩线架3的插接槽412。两个绝缘件41分别对称的设置在直流无刷电机的两侧，本实施例中，两个绝缘件41安装在壳体20的外侧。该绝缘件41与壳体20之间的装配方式可以如下：绝缘件41的本体411向外突伸形成有卡接块413，壳体20上形成有与该卡接块413配合的卡接槽(未图示)。In this embodiment, the electrical connector 3 is a metal hook wire rack 3. The number of the metal hook wire racks 3 is set to two groups, namely the first metal hook wire rack and the second metal hook wire rack. In this embodiment, the two sets of metal hook wire racks 3 have the same structure. The structure of the first metal hook wire rack is described in detail below by taking the first metal hook wire rack as an example. A first connecting portion 32 for electrically connecting with the winding 2 and a second connecting portion 33 for electrically connecting with the power cord 100 are formed at both ends of the board body portion 31. The first connecting portion 32 is formed by bending from the board body portion 31, the second connecting portion 33 is tilted outward from the board body portion 31, and the second connecting portion 33 is formed with a through hole 34 for inserting the power cord 100. The two sets of metal hook wire frames 3 are arranged on the outer side of the stator 1 in a two-by-two symmetrical manner along the circumferential direction of the stator 1. In other embodiments, the two sets of metal hook wire frames 3 can also be arranged asymmetrically on the outside of the stator 1, and the two sets of metal hook wire frames 3 are only arranged on the outside of the stator 1 at a certain angle. In this embodiment, an insulating member 41 is installed on the housing 4 of the DC brushless motor, the number of insulating members 41 is two, and the metal hook wire frame 3 is inserted on the insulating member 41, and each insulating member 41 is installed There is a set of metal hook wire rack 3. Specifically, the first metal hook wire frame is installed on one of the insulating members 41, and the second metal hook wire frame is installed on the other insulating member 41. Each insulating member 41 includes a body 411 and three insertion grooves 412 formed on the body 411 for inserting the metal hook wire frame 3. Two insulators 41 are respectively arranged symmetrically on both sides of the DC brushless motor. In this embodiment, the two insulators 41 are installed on the outside of the housing 20. The assembling method between the insulating member 41 and the housing 20 may be as follows: the main body 411 of the insulating member 41 protrudes outward to form a clamping block 413, and the housing 20 is formed with a clamping groove matching the clamping block 413 (Not shown).
本实施例中，该金属钩线架3的形状为曲线型，通过此种设计使外形流畅，接线时整齐排列，不会互相粘连，所以，在实际工作中，采用若干个金属钩线架3组合使用，便于自动化生产制造，同时，由于金属钩线架3通过绝缘件41安装在壳体20的外侧，从而缩短了直流无刷电机轴向尺寸。In this embodiment, the shape of the metal hook wire rack 3 is curved. Through this design, the shape is smooth, and the wiring is neatly arranged and will not adhere to each other. Therefore, in actual work, several metal hook wire racks 3 are used. The combined use facilitates automated production and manufacturing. At the same time, since the metal hook wire frame 3 is installed on the outside of the housing 20 through the insulating member 41, the axial size of the DC brushless motor is shortened.
请参见图4和图5，在第二实施例中所示的直流无刷电机的基本结构与第一实施例相同，区别在于，绕组布线方式和电连接件5的不同，本实施例采用如下方式：若干第一类绕组、若干第二类绕组呈间隔缠绕在若干齿部12上，即每个齿部12上仅缠绕一个绕组，相邻齿部12上缠绕的绕组为不同类绕组。具体的，6个齿部12上分别依次缠绕有具有第一接出端U1的第一绕组、具有两个第四接出端U2的第四绕组、具有两个第三接出端V1第三绕组、具有两个第六接出端V2的第六绕组、具有两个第二接出端W1的第二绕组和具有两个第五接出端W2的第五绕组。本实施例中电连接件5为金属插片5。每个金属插片5的顶端设有用以与电源线100连接的孔51，金属插片5的尾端为以插接的方式与绕组连接的圆形片状体。金属插片5通过在直流无刷电机的壳体4上设置卡槽(未标号)固定。采用这种方案的直流无刷电机便于生产制造自动化。该金属插片5的数量对应第一类绕组的个数与第二类绕组的个数之和设置，即本实施例中，该金属插片5的数量为6个，6个金属插片分为两组，两组金属插片5对称设置在壳体4的两端面上。每个端面上的3个金属插片5沿端面的周向均匀布置且靠近端面的外圆周上，在本申请的其他实施例中，两组金属插片5也可 以不对称而成一定角度的设置在壳体4的端面上。4 and 5, the basic structure of the brushless DC motor shown in the second embodiment is the same as that of the first embodiment. The difference lies in the winding wiring method and the electrical connector 5. This embodiment adopts the following Method: A number of first type windings and a number of second type windings are wound on a number of teeth 12 at intervals, that is, only one winding is wound on each tooth 12, and the windings wound on adjacent teeth 12 are different types of windings. Specifically, the six teeth 12 are respectively wound with a first winding with a first terminal U1, a fourth winding with two fourth terminal U2, and a third winding with two third terminal V1. Windings, a sixth winding with two sixth terminals V2, a second winding with two second terminals W1, and a fifth winding with two fifth terminals W2. In this embodiment, the electrical connector 5 is a metal insert 5. The top end of each metal insert 5 is provided with a hole 51 for connecting with the power cord 100, and the tail end of the metal insert 5 is a circular sheet body connected to the winding in a plug-in manner. The metal insert 5 is fixed by providing a card slot (not labeled) on the housing 4 of the DC brushless motor. The brushless DC motor adopting this scheme is convenient for manufacturing automation. The number of the metal inserts 5 is set corresponding to the sum of the number of the first type of windings and the number of the second type of windings, that is, in this embodiment, the number of the metal inserts 5 is 6, and the number of metal inserts is divided into 6 There are two sets, two sets of metal inserts 5 are symmetrically arranged on the two ends of the housing 4. The three metal inserts 5 on each end surface are evenly arranged along the circumferential direction of the end surface and close to the outer circumference of the end surface. In other embodiments of the present application, the two sets of metal inserts 5 may also be asymmetrical and form a certain angle. Set on the end surface of the housing 4.
请参见图6和图7，在第三实施例中所示的直流无刷电机的基本结构与第一实施例相同，区别在于，绕组布线方式和电连接件6的不同。本实施例采用如下方式：若干第一类绕组分别依次顺序缠绕在相邻的若干齿部12上，若干第二类绕组分别依次顺序缠绕在相邻的其他若干齿部12上，即，每个齿部12上仅缠绕有一个绕组，顺序相邻的三个齿部12上缠绕的绕组为同一类，另一顺序相邻的三个齿部12上缠绕的绕组为另一类。具体的，3个相邻的齿部12上分别缠绕具有第一接出端U1的第一绕组、具有两个第二接出端W1第二绕组和具有两个第三接出端V1第三绕组，另外3个相邻的齿部12上分别缠绕具有两个第四接出端U2的第四绕组、具有两个第五接出端W2的第五绕组和具有两个第六接出端V2的第六绕组。Referring to FIGS. 6 and 7, the basic structure of the brushless DC motor shown in the third embodiment is the same as that of the first embodiment, except that the winding wiring method and the electrical connector 6 are different. This embodiment adopts the following method: a number of windings of the first type are respectively wound in sequence on several adjacent teeth 12, and several windings of the second type are wound in sequence on other adjacent teeth 12 respectively, that is, each Only one winding is wound on the tooth 12, the windings wound on the three adjacent teeth 12 are of the same type, and the windings wound on the three adjacent teeth 12 are of another type. Specifically, three adjacent teeth 12 are respectively wound with a first winding with a first terminal U1, a second winding with two second terminals W1, and a third winding with two third terminals V1. Winding, the other three adjacent teeth 12 are respectively wound with a fourth winding with two fourth terminal U2, a fifth winding with two fifth terminal W2 and two sixth terminal The sixth winding of V2.
本实施例中电连接件6为电路板6，具体为柔性电路板(PCB板)。本实施例中，电路板6为两个，为第一电路板和第二电路板，该第一电路板分别与第一绕组、第二绕组和第三绕组电性连接，第二电路板分别与第四绕组、第五绕组和第六绕组电性连接。电路板6一端以插接的方式与若干类绕组连接，另一端设有接线孔21，通过接线孔21与电源线100连接。该电路板6通过在直流无刷电机的壳体4上设置卡扣组件(未标号)固定在壳体4的外侧。该第一电路板、第二电路板相对设置在壳体4的两端面上。为减少电机在轴向尺寸的不必要的增大，本实施例中的电路板6还可为做成多次层板结构，在其中一个实施例中，电路板6包括第一层电路板和第二层电路板，第一层电路板和第二层电路板之间相互电隔离，第一层电路板分别与第一绕组、第二绕组和第三绕组电性连接，第二层电路板分别与第四绕组、第五绕组和第六绕组电性连接，电路板6通过在直流无刷电机的壳体4上设置卡扣组件(未标号)固定在壳体4的外侧，设置在壳体4的一侧端面上。In this embodiment, the electrical connector 6 is a circuit board 6, specifically a flexible circuit board (PCB board). In this embodiment, there are two circuit boards 6 which are a first circuit board and a second circuit board. The first circuit board is electrically connected to the first winding, the second winding and the third winding, respectively, and the second circuit board is respectively It is electrically connected with the fourth winding, the fifth winding and the sixth winding. One end of the circuit board 6 is connected to several types of windings in a plug-in manner, and the other end is provided with a wiring hole 21, and is connected to the power cord 100 through the wiring hole 21. The circuit board 6 is fixed on the outside of the housing 4 by arranging a buckle assembly (not labeled) on the housing 4 of the DC brushless motor. The first circuit board and the second circuit board are oppositely arranged on the two end surfaces of the housing 4. In order to reduce the unnecessary increase in the size of the motor in the axial direction, the circuit board 6 in this embodiment can also be made into a multi-layer board structure. In one of the embodiments, the circuit board 6 includes a first-layer circuit board and The second layer circuit board, the first layer circuit board and the second layer circuit board are electrically isolated from each other, the first layer circuit board is electrically connected to the first winding, the second winding and the third winding, and the second layer circuit board The circuit board 6 is electrically connected to the fourth winding, the fifth winding and the sixth winding respectively. The circuit board 6 is fixed on the outside of the housing 4 by arranging a snap assembly (not labeled) on the housing 4 of the DC brushless motor, and is arranged on the housing 4 The end face of one side of the body 4.
需要说明的是，上述三个实施例中绕组布线方式互相之间可以替换。另外，当有3类绕组或者3类以上绕组时，对应的金属钩线架、金属插片和电路板的数量也可随之增多。It should be noted that the winding wiring modes in the above three embodiments can be replaced with each other. In addition, when there are 3 types of windings or more than 3 types of windings, the number of corresponding metal hooks, metal inserts and circuit boards can also increase accordingly.
综上所述，上述实施例的直流无刷电机解决了现有技术中直流无刷电机的 电源线接线与绕组的接出端的连接复杂、难以自动化生产制造的弊端，通过在直流无刷电机内设置至少两组电连接件，且由每个电连接件先与对应的绕组电性连接再电性连接于电源线，减少了接线工序，从而提高了制造效率，有助于降低成本，另外，通过采用电连接件，摒弃了漆包线的连接方式，也有助于减小直流无刷电机的整体体积，使得本发明的直流无刷电机尤其适合应用于握持工具中。In summary, the brushless DC motor of the above embodiment solves the disadvantages of the complicated connection between the power cord wiring of the DC brushless motor and the terminal of the winding in the prior art, and it is difficult to automate the production and manufacture. At least two sets of electrical connectors are provided, and each electrical connector is first electrically connected to the corresponding winding and then electrically connected to the power cord, reducing the wiring process, thereby improving manufacturing efficiency and helping to reduce costs. In addition, By using the electrical connector, the enameled wire connection method is abandoned, and the overall volume of the DC brushless motor is also reduced, so that the DC brushless motor of the present invention is particularly suitable for use in holding tools.
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only express several implementation modes of the present invention, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (15)

  1. 一种直流无刷电机，包括被设置为绕一中心轴线转动的转子、围设在所述转子外侧的定子以及缠绕在所述定子上的若干类绕组，若干类绕组包括若干第一类绕组和若干第二类绕组，其特征在于，所述直流无刷电机还包括两组电连接件，每类所述绕组对应一组所述电连接件，每组所述电连接件先与对应的绕组电性连接再电性连接于电源线，所述第一类绕组通过一组所述电连接件与外部第一电源连接，所述第二绕组通过另一组所述电连接件与外部第二电源连接。A DC brushless motor includes a rotor set to rotate around a central axis, a stator surrounding the rotor, and several types of windings wound on the stator. The several types of windings include several first type windings and Several second-type windings, characterized in that, the DC brushless motor further includes two sets of electrical connectors, each of the windings corresponds to a set of the electrical connectors, and each set of the electrical connectors is first connected to the corresponding winding Electrically connected and then electrically connected to the power cord, the first type winding is connected to an external first power source through a set of the electrical connectors, and the second winding is connected to an external second power source through another set of the electrical connectors. Power connection.
  2. 如权利要求1所述的直流无刷电机，其特征在于，所述电连接件为金属钩线架，两组所述金属钩线架沿所述定子的周向上布置在所述定子的外侧。The DC brushless motor according to claim 1, wherein the electrical connector is a metal hook wire frame, and two sets of the metal hook wire frame are arranged on the outer side of the stator along the circumferential direction of the stator.
  3. 如权利要求2所述的直流无刷电机，其特征在于，两组所述金属钩线架沿所述定子的周向上呈两两对称的方式布置在所述定子的外侧。3. The DC brushless motor according to claim 2, wherein the two sets of metal hook wire frames are arranged on the outer side of the stator in a two-by-two symmetrical manner along the circumferential direction of the stator.
  4. 如权利要求2所述的直流无刷电机，其特征在于，所述电机还包括包覆所述定子的外壳，所述外壳的外圆柱面上设置有绝缘件，所述金属钩线架插接在所述绝缘件上。The DC brushless motor of claim 2, wherein the motor further comprises a housing covering the stator, an insulating member is provided on the outer cylindrical surface of the housing, and the metal hook wire frame is inserted On the insulator.
  5. 如权利要求1所述的直流无刷电机，其特征在于，所述电连接件为金属插片，所述金属插片分成两组，每组所述金属插片的数量对应所述第一类绕组的个数或第二类绕组的个数，两组所述金属插片分别设置在所述直流无刷电机的两端面上。The DC brushless motor according to claim 1, wherein the electrical connector is a metal insert, the metal insert is divided into two groups, and the number of the metal insert in each group corresponds to the first type For the number of windings or the number of windings of the second type, the two sets of metal inserts are respectively arranged on both ends of the DC brushless motor.
  6. 如权利要求5所述的直流无刷电机，其特征在于，两组所述金属插片对称设置在所述直流无刷电机的两端面上。The brushless DC motor of claim 5, wherein two sets of the metal inserts are symmetrically arranged on both ends of the brushless DC motor.
  7. 如权利要求1所述的直流无刷电机，其特征在于，所述电连接件为电路板。The brushless DC motor of claim 1, wherein the electrical connection member is a circuit board.
  8. 如权利要求7所述的直流无刷电机，其特征在于，所述电路板为第一电路板和第二电路板，所述第一电路板分别与若干第一类绕组电性连接，所述第二电路板分别与若干第二类绕组电性连接，所述第一电路板、第二电路板相对设置在所述直流无刷电机的两端面上。7. The DC brushless motor of claim 7, wherein the circuit boards are a first circuit board and a second circuit board, and the first circuit boards are electrically connected to a plurality of first-type windings, respectively, and The second circuit board is electrically connected with a plurality of second-type windings, and the first circuit board and the second circuit board are arranged oppositely on the two end faces of the DC brushless motor.
  9. 如权利要求7所述的直流无刷电机，其特征在于，所述电路板包括第一层电路和第二层电路，相互电隔离，设置在所述直流无刷电机的一侧端面上， 第一层电路与若干第一类绕组连接，第二层电路与第二类绕组电性连接。The brushless DC motor according to claim 7, wherein the circuit board includes a first layer circuit and a second layer circuit, which are electrically isolated from each other, and are arranged on one end surface of the DC brushless motor. The circuit of one layer is connected with a plurality of windings of the first type, and the circuit of the second layer is electrically connected with the winding of the second type.
  10. 如权利要求1所述的直流无刷电机，其特征在于，所述定子包括围设在所述转子外侧且以所述中心轴线为轴心的环轭部和自所述环轭部上朝所述转子方向突伸形成的若干齿部，所述若干齿部的数量与所述若干第一类绕组的个数和若干所述第二类绕组的个数的总和相同。The DC brushless motor according to claim 1, wherein the stator includes a ring yoke part surrounding the rotor and taking the central axis as the axis, and a ring yoke part facing upward from the ring yoke part. The number of teeth protruding in the direction of the rotor is the same as the sum of the number of windings of the first type and the number of windings of the second type.
  11. 如权利要求10所述的直流无刷电机，其特征在于，所述第一类绕组、第二类绕组与所述齿部的布置方式为：The DC brushless motor of claim 10, wherein the arrangement of the first type winding, the second type winding and the tooth part is:
    所述若干第一类绕组、所述若干第二类绕组呈间隔缠绕在所述若干齿部上；The plurality of first-type windings and the plurality of second-type windings are wound on the plurality of teeth at intervals;
    或，所述若干第一类绕组缠绕分别依次顺序缠绕在相邻的所述若干齿部上，所述若干第二类绕组分别依次顺序缠绕在相邻的其他若干齿部上。Or, the plurality of windings of the first type are respectively sequentially wound on the adjacent teeth, and the plurality of windings of the second type are respectively wound sequentially on the other adjacent teeth.
  12. 如权利要求10所述的直流无刷电机，其特征在于，所述第一类绕组、第二类绕组与所述齿部的布置方式为：每个所述第一类绕组和第二类绕组重叠缠绕在同一所述齿部上，第一类绕组缠绕在定子齿部的外表面上靠近定子齿部外表面，第二类绕组缠绕在第一类绕组上远离定子齿部的外表面设置。The DC brushless motor according to claim 10, wherein the arrangement of the first type winding, the second type winding and the tooth part is: each of the first type winding and the second type winding Overlapping and winding on the same tooth part, the first type winding is wound on the outer surface of the stator tooth part close to the outer surface of the stator tooth part, and the second type winding is wound on the first type winding and arranged away from the outer surface of the stator tooth part.
  13. 如权利要求12所述的直流无刷电机，其特征在于，所述第一类绕组的各个绕组的匝数与所述第二类绕组的各个绕组的匝数不同，或所述第一类绕组的各个绕组的线径与所述第二类绕组的各个绕组的线径不同。The DC brushless motor of claim 12, wherein the number of turns of each winding of the first type of winding is different from the number of turns of each winding of the second type of winding, or the number of turns of the first type of winding The wire diameter of each winding of the second type of winding is different from the wire diameter of each winding of the second type of winding.
  14. 如权利要求10所述的直流无刷电机，其特征在于，所述若干第一类绕组的数量为3个，所述若干第二类绕组的数量为3个。The brushless DC motor of claim 10, wherein the number of the plurality of first type windings is three, and the number of the plurality of second type windings is three.
  15. 如权利要求1所述的直流无刷电机，其特征在于，所述第一外部电源为直流电源，所述第二外部电源为交流电源。The DC brushless motor of claim 1, wherein the first external power source is a DC power source, and the second external power source is an AC power source.
PCT/CN2020/133894 2019-12-05 2020-12-04 Brushless direct-current electric motor WO2021110137A1 (en)

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CN205123457U (en) * 2015-11-27 2016-03-30 浙江三锋实业股份有限公司 Connection structure of three -phase winding brushless motor lead -out wire
CN107968510A (en) * 2017-12-29 2018-04-27 重庆超力高科技股份有限公司 Insulation framework, stator module and brushless electric machine
US10090736B2 (en) * 2015-11-02 2018-10-02 Mitsubishi Electric Corporation Rotary electric machine integrated with control device
CN209200212U (en) * 2018-12-20 2019-08-02 捷和电机制品(深圳)有限公司 Electric connection terminal and three-phase brushless motor

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CN103023262A (en) * 2011-09-27 2013-04-03 浙江三花股份有限公司 Direct current brushless motor pump, motor, stator assembly, and method for assembling motor
CN103973068A (en) * 2013-01-24 2014-08-06 苏州科固电器有限公司 Brushless motor with connector
US10090736B2 (en) * 2015-11-02 2018-10-02 Mitsubishi Electric Corporation Rotary electric machine integrated with control device
CN105322686A (en) * 2015-11-27 2016-02-10 浙江三锋实业股份有限公司 Connection structure of outgoing line of three-phase winding brushless motor and winding method for connection structure
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