WO2020199912A1 - 动力源和适用于动力源的电动工具 - Google Patents

动力源和适用于动力源的电动工具 Download PDF

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Publication number
WO2020199912A1
WO2020199912A1 PCT/CN2020/079709 CN2020079709W WO2020199912A1 WO 2020199912 A1 WO2020199912 A1 WO 2020199912A1 CN 2020079709 W CN2020079709 W CN 2020079709W WO 2020199912 A1 WO2020199912 A1 WO 2020199912A1
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WO
WIPO (PCT)
Prior art keywords
power source
motor
stator
cover
motor shaft
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PCT/CN2020/079709
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English (en)
French (fr)
Inventor
凌齐
姚凯
刘天亮
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南京德朔实业有限公司
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Application filed by 南京德朔实业有限公司 filed Critical 南京德朔实业有限公司
Publication of WO2020199912A1 publication Critical patent/WO2020199912A1/zh

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    • 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
    • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Definitions

  • This application relates to a power source and an electric tool suitable for the power source.
  • the power source is a component that drives the work of an electric tool.
  • the motor in it rotates to generate driving force.
  • the relative rotation between the rotor and the stator will produce a certain degree of noise.
  • the friction of the rotor with the air flow during the rotation process will also produce a certain degree of noise.
  • the case also needs to be formed with a receiving groove for accommodating the motor.
  • the motor shaft is supported by the bearing installed on the housing.
  • the bearing chamber used to install the bearing and the receiving groove used to install the motor are difficult to achieve in the process.
  • the motor shaft When the motor is assembled, the motor shaft can receive force in a straight direction, that is, under normal circumstances, the motor shaft is located in the motor.
  • the part and the part outside the motor are on different axes, and their coaxiality needs to be calibrated many times to meet the output requirements. How to provide a power source that can effectively reduce wind noise and easily achieve high coaxiality is a technical problem to be solved by those skilled in the art.
  • the present application provides a power source that can effectively reduce wind noise and achieve higher coaxiality and an electric tool suitable for the power source.
  • a power source including: a motor, including a motor shaft extending in a first linear direction;
  • the motor includes a stator and a rotor; the stator includes connecting arms for winding windings, the connecting arms are distributed around the stator, and there is a gap between adjacent connecting arms; the motor also includes a filler for filling at least part of the gap; the filler includes: an insert , Filled into the gap; the first joining part, connected to the first end of the insert; the first joining part extends around the first straight line and is formed with a rectifying part, the rectifying part divides at least part of the stator and the space outside the stator.
  • the rectifying part includes an extension surface extending radially around the first straight line, and the extension surface can be extended to a preset length.
  • the blade is arranged between the gap of the connecting arm and the winding.
  • it further includes: a first cover body formed with a first through hole for the motor shaft to pass through; a second cover body connected to the first cover body and formed with a second through hole for the motor shaft to pass through; When a cover body is connected with the second cover body, an accommodating cavity for accommodating the motor is formed, and the first through hole, the second through hole and the motor shaft have a concentric axis parallel to the first straight line.
  • the filling member further includes: a second coupling portion connected to the second end of the insert piece.
  • the second coupling portion is formed with a bayonet, and an end of the second cover body away from the first cover is formed with a structural rib, and the bayonet can be fixed to the structural rib.
  • the inserts are evenly distributed around the first straight line, and are connected as a whole through the first coupling part and the second coupling part.
  • the first cover body and the second cover body are further formed with a bearing chamber for accommodating the bearing, the bearing is used to support the motor shaft; when the motor shaft is supported by the bearing provided in the bearing chamber, the motor shaft and the bearing have one Concentric axis parallel to the first straight line.
  • the power source further includes a fan connected to the motor shaft, and the fan is located between the first coupling part and the first cover.
  • the hub ratio of the fan is greater than or equal to 0.36 and less than or equal to 0.40.
  • the rotation speed of the motor is greater than or equal to 33,000 r/min and less than or equal to 39,000 r/min.
  • the insert is made of an elastic material and has a preset strength.
  • a power source includes: a motor, including a motor shaft extending in a first linear direction; a first cover body, forming a first through hole for the motor shaft to pass through; a second cover body, connected to the first cover body and A second through hole is formed for the motor shaft to pass through; when the first cover body is connected to the second cover body, an accommodating cavity for accommodating the motor is formed.
  • the first through hole, the second through hole and the motor shaft have a parallel first Concentric axes of straight lines.
  • the motor includes a stator and a rotor
  • the stator includes connecting arms for winding windings, the connecting arms are distributed around the stator, and there is a gap between adjacent connecting arms; the motor also includes a filler for filling at least part of the gap.
  • the filler includes: an insert piece, which is filled into the gap; a first coupling portion, which connects to the first end of the insert piece; and a second coupling portion, which connects to the second end of the insert piece.
  • the first coupling portion is formed with a rectifying portion extending around the first straight line, and the rectifying portion divides at least part of the space between the stator and the first cover.
  • the second coupling portion is formed with a bayonet, and an end of the second cover body away from the first cover is formed with a structural rib, and the bayonet can be fixed to the structural rib.
  • a power source includes: a motor, including a motor shaft extending in a first linear direction; a first cover body, forming a first through hole for the motor shaft to pass through; a second cover body, connected to the first cover body and A second through hole is formed for the motor shaft to pass through; when the first cover body is connected to the second cover body, an accommodating cavity for accommodating the motor is formed.
  • the first through hole, the second through hole and the motor shaft have a parallel first A straight concentric axis;
  • the motor includes a stator and a rotor;
  • the stator includes connecting arms for winding windings, the connecting arms are distributed around the stator, and there is a gap between adjacent connecting arms;
  • the motor includes a filler for filling at least part of the gap.
  • An electric tool includes any one of the above-mentioned power sources.
  • the rectifying part is provided, so that the rectifying part can divide at least part of the stator and the space outside the stator, and reduce the noise of the motor.
  • Figure 1 is a perspective view of the power source
  • Figure 2 is a perspective view of the power source in Figure 1 from another perspective;
  • Figure 3 Three-dimensional view of the electric drill
  • Figure 4 is an exploded schematic diagram of the power source in Figure 1;
  • Fig. 5 is an exploded schematic diagram of the power source in Fig. 4 from another perspective;
  • Figure 6 is a cross-sectional view of the power source in Figure 4.
  • Figure 7 is a further exploded schematic diagram of the power source in Figure 4.
  • Fig. 8 is an exploded schematic diagram of the power source in Fig. 7 from another perspective
  • Figure 9 is a perspective view of the stator of the power source in Figure 8.
  • Figure 10 is a perspective view of the filler of the power source in Figure 8.
  • Fig. 11 is a perspective view of the fan of the power source in Fig. 4.
  • the power source 100 shown in FIGS. 1 to 2 includes a first cover 11, a second cover 12 and a motor 13. Wherein, the first cover body 11 and the second cover body 12 are connected to form a receiving cavity for accommodating the motor 13.
  • the motor 13 includes a motor shaft 134 and is fixed by the first cover 11 and the second cover 12.
  • FIG. 3 shows an electric drill 14 suitable for the power source 100.
  • the electric drill 14 includes a housing 141 and a power output part 142.
  • the housing 141 is formed with a receiving part and a handle part.
  • the power output part 142 and the power source 100 are at least partially disposed in the receiving part, and the handle part can be held by the user to operate the electric drill 14. Since the power source 100 is a separate part, the motor 13 in it has been fixed by the first cover 11 and the second cover 12, the housing 141 of the electric drill 14 does not need to form a receiving slot for the motor 13. It only needs to be used to form a cavity for accommodating the power source 100. In fact, when the housing 141 forms a receiving groove for accommodating the motor 13, it has extremely high technical requirements.
  • the housing 141 When the motor 13 is installed in the housing 141, the housing 141 is used to accommodate the accommodating groove of the motor 13 and The bearing chamber of the bearing 15 needs to be revised several times to realize the actual demand for the coaxiality of the motor 13. That is, after the motor 13 is installed in the accommodating groove, the motor shaft 134 is supported by the bearing 15 and the bearing 15 is located in the bearing chamber. The motor shaft 134 cannot achieve true coaxiality from the accommodating groove to the bearing chamber, and there will be deviations in force. The abrasion between the stator 131 and the rotor 132 of the motor 13 is increased.
  • the motor 13 has been fixed in the first cover 11 and the second cover 12, and its coaxiality has been calibrated before being installed in the housing 141.
  • the A cover 11 and a second cover 12 fix the motor 13 so that the coaxiality can be improved more easily.
  • the first cover body 11 and the second cover body 12 both extend along a first straight line 101 parallel to the motor shaft 134.
  • the first cover body 11 forms a first through hole 111 through which the motor shaft 134 can pass
  • the second cover body 12 forms a second through hole 121 through which the motor shaft 134 can pass.
  • the center of the first through hole 111, the center of the second through hole 121, and the axis of the motor shaft 134 are substantially on the same straight line. That is, the first cover 11, the second cover 12 and the motor 13 are coaxial.
  • first cover body 11 and the second cover body 12 actually divide the housing 141 used to install the housing groove and the bearing chamber of the motor 13 into a single part, so as to better improve the motor 13
  • the bearing 15 for supporting the motor shaft 134 is installed in the first through hole 111 and the second through hole 121 respectively.
  • the first cover body 11 and the second cover body 12 are connected as a whole by a fixing member 16. That is, in this embodiment, the bearings for supporting the motor shaft 134 are provided in the first cover 11 and the second cover 12, so that the bearing chamber originally used for accommodating the bearing is removed from the housing 141 of the motor 13 to be installed.
  • the power source 100 as a power unit can be installed in any connection It is not necessary to consider whether the housing 141 can achieve a higher coaxiality between the motor shaft 134 and the bearing chamber when the motor 13 is installed on the housing 141, thereby improving the versatility of the motor 13.
  • the power source 100 in this embodiment is applicable to any electric tool. The difference is only that different electric tools require different output power, and different power output requirements only need to adjust the parameters of the motor 13 itself.
  • the motor 13 includes a stator 131 and a rotor 132. Both the stator 131 and the rotor 132 extend along the first straight line 101 to a predetermined length. As an implementation manner, the rotor 132 is arranged in the stator 131 and can rotate relative to the stator 131. In fact, it can be understood that the rotor 132 may also be arranged outside the stator 131 and rotate relative to the stator 131.
  • the stator 131 is formed with a through hole through which the rotor 132 can pass, and the rotor 132 can rotate freely in the through hole.
  • the stator 131 further includes an iron core 131a and a winding 131b, and the iron core 131a is formed with a connecting arm 131c for winding the winding 131b.
  • the connecting arms 131c are distributed around the direction of the first straight line 101 and are located in the through holes.
  • a large gap 131d is left between each connecting arm 131c.
  • FIG. 9 after the winding 131b is wound on the connecting arm 131c and filled in the gap 131d, there will still be more gaps 131d that are not fully filled.
  • the rotor 132 When the rotor 132 rotates in the stator 131 at a high speed, the rotor 132 exerts a certain force on the stator 131. Especially for the motor 13 with a higher speed, when the speed of the rotor 132 is greater than or equal to 33000r/min, the rotor 132 will exert a greater force on the stator 131. When the speed of the rotor 132 is greater than or equal to 33000r/min and less than or equal to At 39000 r/min, the force will cause relative movement between each connecting arm 131c of the stator 131, which will generate a lot of noise. It can be understood that it is the existence of the gap 131d that the connecting arm 131c has a space for relative movement.
  • the motor 13 further includes a filler 133 for filling the gap 131d between the connecting arms 131c .
  • the filler 133 can fully fill the gap 131d of the connecting arm 131c of the iron core 131a after the winding 131b is wound, and can at least partially close the space of the winding 131b of the iron core 131a along the first straight line 101.
  • the filler 133 includes an inserting piece 133a, a first coupling portion 133b and a second coupling portion 133d.
  • the insert 133a is used to fully fill the gap 131d of the connecting arm 131c, and the number of insert 133a corresponds to the gap 131d between the connecting arms 131c.
  • the winding 131b is wound to the connecting arm 131c, there are certain protrusions or grooves. That is to say, the winding 131b is not all evenly wound on the connecting arm 131c.
  • the insert 133a needs to have a certain elasticity so that it can be filled into the protrusion or groove formed by the winding 131b, so as to prevent the motor 13 from rotating at a high speed. Due to insufficient filling in the gap 131d of the connecting arm 131c, there will still be relative displacement. On the other hand, due to the fast speed of the motor 13, the insert 133a filled in the gap 131d needs to have a certain strength, but the strength is too high. When the insert 133a is inserted into the gap 131d, the surface of the winding 131b will be damaged. As a result, the winding 131b wound on each connecting arm 131c is short-circuited, thereby damaging the motor 13.
  • the insert 133a needs to have two characteristics, namely, a certain elastic force and a certain strength. After the insert 133a is inserted into the gap 131d, at this time, each connecting arm 131c is connected to form a whole through the insert 133a. At this time, the overall rigidity of the stator 131 will increase significantly.
  • the first coupling portion 133b and the second coupling portion 133d are used to connect the insert piece 133a, so that the insert piece 133a forms a whole.
  • the first joining portion 133b has a rectifying portion 133c distributed around the first straight line 101.
  • the rectifying portion 133c is a circular ring formed around the first straight line 101, which has an extending surface along the radial direction of the first straight line 101 and can extend to a predetermined length so as to be along the first straight line. At least part of the winding 131b and the rotor 132 are enclosed in the radial direction of 101.
  • the first coupling portion 133b and the first cover 11 cooperate to form a relatively independent accommodation space, and the fan 17 is located in the accommodation space.
  • the rectifying portion 133c divides the space from the inside of the motor 13 to the first cover 11, so that the airflow inside the motor 13 can flow in a regular state, that is, the airflow can flow along the first joint 133b.
  • the ring flows quickly, and the airflow will not be confused due to the winding 131b and the connecting arm 131c. Thereby, the noise of the fan 17 of the motor 13 is reduced, and the heat dissipation efficiency is increased.
  • a bayonet 133e is formed between the second coupling portion 133d connecting two adjacent insert pieces 133a, and the bayonet 133e can clamp the structural rib 122 at the end of the second cover 12 away from the first cover 11.
  • the filler 133 is fixed to the second cover 12 again while being fixed to the gap 131d, thereby increasing the stability of the filler 133.
  • the noise generated during the normal operation of the fan 17 mainly comes from dipole noise, which is formed by the force of the airflow interacting with the object on the space.
  • the fan 17 optimizes the blade structure so that the hub ratio in this embodiment is greater than or equal to 0.36 and less than or equal to 0.40, and the thickness of the blade reaches 1mm, so that the fan 17 is in the motor 13 Under high-speed rotation, the noise is significantly reduced.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

本申请公开了一种动力源和适用于动力源的电动工具，包括：电机，包括沿第一直线方向延伸的电机轴；电机包括定子和转子；定子包括用于缠绕绕组的连接臂，连接臂围绕定子分布，相邻连接臂之间具有间隙；电机还包括用于填充至少部分间隙的填充件；填充件包括：插片，填充至间隙中；第一结合部，连接插片的第一端；第一结合部围绕第一直线延伸并形成有整流部，整流部分割至少部分定子与定子之外的空间。该动力源同轴度高，风噪小。

Description

动力源和适用于动力源的电动工具
本公开要求在2019年04月01日提交中国专利局、申请号为201910256613.4的中国专利申请的优先权，以上申请的全部内容通过引用结合在本公开中。
技术领域
本申请涉及一种动力源和适用于动力源的电动工具。
背景技术
动力源作为一种驱动电动工具工作的元件，其中的电机通过转动以产生驱动力，对于一些转速较高的电机而言，其转子和定子之间的相对转动会产生一定程度的噪音。同时，转子转动过程中与气流摩擦，也会产生一定程度的噪音。此外，在电机固定至电动工具的壳体中，壳体也需要形成有用于容纳电机的容纳槽。然而，电机在安装至壳体时，其电机轴是通过安装在壳体上的轴承予以支撑的。而用于安装轴承的轴承室和用于安装电机的容纳槽在工艺上很难实现使得电机在装配时，其电机轴能够沿一个直线方向受力，即一般情况下，电机轴位于电机内的部分和位于电机外的部分不同轴，其同轴度需要多次校准才能满足输出要求。如何提供一种能够有效降低风噪且能轻松实现高同轴度的动力源是本领域技术人员亟待解决的技术问题。
发明内容
本申请提供一种能有效降低风噪且能实现较高同轴度的动力源和适用于动力源的电动工具。
本申请采用如下的技术方案：
一种动力源，包括：电机，包括沿第一直线方向延伸的电机轴；
电机包括定子和转子；定子包括用于缠绕绕组的连接臂，连接臂围绕定子分布，相邻连接臂之间具有间隙；电机还包括用于填充至少部分间隙的填充件；填充件包括：插片，填充至间隙中；第一结合部，连接插片的第一端；第一结合部围绕第一直线延伸并形成有整流部，整流部分割至少部分定子与定子之外的空间。
可选地，整流部包括围绕第一直线的径向延伸的延伸面，延伸面能延长至预设长度。
可选地，插片设置在连接臂的间隙和绕组之间。
可选地，还包括：第一罩体，形成可供电机轴通过的第一通孔；第二罩体，连接至第一罩体并形成有可供电机轴通过的第二通孔；第一罩体与第二罩体连接时形成用于容纳电机的容纳腔，第一通孔、第二通孔和电机轴具有一个平行第一直线的同心轴线。
可选地，填充件还包括：第二结合部，连接插片的第二端。
可选地，第二结合部形成有卡口，第二罩体远离第一罩体的一端形成有构造筋，卡口能固定至构造筋上。
可选地，插片围绕第一直线均匀分布，并通过第一结合部和第二结合部连接成一个整体。
可选地，第一罩体和第二罩体还形成有用于容纳轴承的轴承室，轴承用于支撑电机轴；当电机轴通过设置在轴承室中的轴承支撑时，电机轴与轴承具有一个平行于第一直线的同心轴线。
可选地，动力源还包括连接至电机轴上的风扇，风扇位于第一结合部和第一罩体之间。
可选地，风扇的轮毂比大于等于0.36且小于等于0.40。
可选地，电机的转速大于等于33000r/min且小于等于39000r/min。
可选地，插片由弹性材料制成并具有预设强度。
一种动力源，包括：电机，包括沿第一直线方向延伸的电机轴；第一罩体，形成可供电机轴通过的第一通孔；第二罩体，连接至第一罩体并形成有可供电机轴通过的第二通孔；第一罩体与第二罩体连接时形成用于容纳电机的容纳腔，第一通孔、第二通孔和电机轴具有一个平行第一直线的同心轴线。
可选地，电机包括定子和转子；
定子包括用于缠绕绕组的连接臂，连接臂围绕定子分布，相邻连接臂之间具有间隙；电机还包括用于填充至少部分间隙的填充件。
可选地，填充件包括：插片，填充至间隙中；第一结合部，连接插片的第一端；第二结合部，连接插片的第二端。
可选地，第一结合部围绕第一直线延伸形成有整流部，整流部分割至少部分定子至第一罩体之间的空间。
可选地，第二结合部形成有卡口，第二罩体远离第一罩体的一端形成有构造筋，卡口能固定至构造筋上。
一种动力源，包括：电机，包括沿第一直线方向延伸的电机轴；第一罩体，形成可供电机轴通过的第一通孔；第二罩体，连接至第一罩体并形成有可供电机轴通过的第二通孔；第一罩体与第二罩体连接时形成用于容纳电机的容纳腔，第一通孔、第二通孔和电机轴具有一个平行第一直线的同心轴线；电机包括定子和转子；定子包括用于缠绕绕组的连接臂，连接臂围绕定子分布，相邻连接臂之间具有间隙；电机包括用于填充至少部分间隙的填充件。
一种电动工具，包括上述任一项的动力源。
本申请通过设置整流部，使得整流部能够分割至少部分定子与定子之外的空间，减小电机的噪声。
附图说明
图1是动力源的立体图；
图2是图1中的动力源的另一视角的立体图；
图3电钻的立体图；
图4是图1中的动力源的分解示意图；
图5是图4中的动力源的另一视角的分解示意图；
图6是图4中的动力源的剖视图；
图7是图4中的动力源的进一步的分解示意图；
图8是图7中的动力源的另一视角的分解示意图；
图9是图8中的动力源的定子的立体图；
图10是图8中的动力源的填充件的立体图；
图11是图4中的动力源的风扇的立体图。
具体实施方式
图1至图2所示的动力源100，其包括：第一罩体11、第二罩体12和电机13。其中，第一罩体11和第二罩体12连接形成有用于容纳电机13的容纳腔。电机13包括电机轴134，并通过第一罩体11和第二罩体12固定。
图3示出了一种适用于动力源100的电钻14，电钻14包括：壳体141、动力输出部142。其中壳体141形成有容纳部和把手部。其中，动力输出部142和动力源100至少部分设置在容纳部中，把手部可供用户握持以操作电钻14。由于动力源100作为一个单独的零件，其中的电机13已通过第一罩体11和第二 罩体12被固定住，电钻14的壳体141不需要再形成用于容纳电机13的容纳槽，而仅需用于形成用于容纳动力源100的腔体即可。事实上，壳体141形成用于容纳电机13的容纳槽时，其在工艺上要求极高，电机13安装至壳体141中时，壳体141用于容纳电机13的容纳槽和用于容纳轴承15的轴承室需要多次修正才能实现电机13的同轴度实际需求。即电机13安装至容纳槽后电机轴134通过轴承15支撑，轴承15位于轴承室内，电机轴134从容纳槽至轴承室无法实现真正意义上的同轴，其在受力上会存在偏差，从而加剧电机13定子131与转子132之间的磨损。而本实施方式中的动力源100，电机13已经被固定在第一罩体11和第二罩体12中了，其同轴度已经在被安装至壳体141前予以校准，此外，通过第一罩体11和第二罩体12固定电机13，其同轴度能够更容易被提高。
如图4至图5所示，第一罩体11和第二罩体12均沿一个平行于电机轴134的第一直线101方向延伸。第一罩体11形成可供电机轴134穿过的第一通孔111，第二罩体12形成可供电机轴134穿过的第二通孔121。第一通孔111的圆心、第二通孔121的圆心和电机轴134轴心基本位于同一条直线上。即第一罩体11、第二罩体12和电机13同轴。可以理解，第一罩体11和第二罩体12实际上将壳体141用于安装电机13的容纳槽和轴承室分割出来，使之成为一个单独的零件，从而能够更好的提高电机13的电机轴134与轴承室之间的同轴度。在本实施方式中，用于支撑电机轴134的轴承15分别安装至第一通孔111和第二通孔121内。第一罩体11和第二罩体12通过固定件16连接成一个整体。即在本实施方式中，用于支撑电机轴134的轴承被设置在第一罩体11和第二罩体12内，从而将原本用于容纳轴承的轴承室从待安装电机13的壳体141上分离出来，使轴承室模块化的存在于动力源100本体上。从而可以有效的减少动力源在装配至壳体141时的调试工作。事实上，由于电机13的电机轴134已经通过第一罩体11和第二罩体12的固定实现了较高的同轴度要求，动力源100作为一个动力单元，可以设置在任意可供连接的壳体141上，而不需要考虑壳体141安装电机13时能否实现电机轴134与轴承室之间较高的同轴度，从而提高了电机13的通用度。事实上，本实施方式中的动力源100适用于任意电动工具上，其区别仅在于不同电动工具所需要的输出功率不同，而不同的功率输出要求仅需要调整电机13本身的参数即可。
如图6至图9所示，电机13包括定子131和转子132。定子131和转子132 均沿第一直线101方向延伸至预设长度。作为一种实现方式，转子132设置在定子131中，并能相对定子131转动。事实上，可以理解，转子132也可以设置在定子131之外并相对定子131转动。定子131形成有可供转子132穿过的通孔，转子132能在通孔内自由转动。定子131还包括铁芯131a和绕组131b，铁芯131a形成有连接臂131c，用于缠绕绕组131b。连接臂131c围绕第一直线101方向分布并位于通孔内，为了方便缠绕绕组131b，每个连接臂131c之间留有较大间隙131d。事实上，如图9所示，在绕组131b缠绕至连接臂131c并填充间隙131d之后，依旧会存在较多间隙131d未被充分填充。转子132在定子131中高速转动过程中，转子132会对定子131产生一定的作用力。尤其是对于较高转速的电机13而言，当转子132的转速大于等于33000r/min时，转子132会对定子131产生较大的作用力，当转子132的转速大于等于33000r/min且小于等于39000r/min时，该作用力会使得定子131的每个连接臂131c之间产生相对运动，从而产生较大噪音。可以理解，正是由于间隙131d的存在，才使得连接臂131c具有了能产生相对运动的运动空间。作为一种实现方式，为了使得绕组131b缠绕至连接臂131c之后，每个连接臂131c之间的空间能被充分填充，电机13还包括用于填充连接臂131c之间的间隙131d的填充件133。填充件133能够充分填充铁芯131a的连接臂131c在被缠绕绕组131b之后留存的间隙131d，并能至少部分封闭铁芯131a的绕组131b沿第一直线101方向的空间。
如图10所示，填充件133包括：插片133a，第一结合部133b和第二结合部133d。其中插片133a用于充分填充至连接臂131c的间隙131d中，插片133a的个数与连接臂131c之间的间隙131d对应。由于绕组131b缠绕至连接臂131c时，其存在一定的凸起或凹槽。即绕组131b并非全部均匀的缠绕至连接臂131c上，此时，需要插片133a具有一定的弹性，使之能够填充至绕组131b形成的凸起或凹槽中，从而避免电机13在高速转动中，连接臂131c的间隙131d中由于填充不充分，依旧会存在相对位移。另一方面，由于电机13的转速较快，填充至间隙131d中的插片133a需要具备一定的强度，而强大太高，在插片133a插入至间隙131d中时，会破坏绕组131b的表面，导致缠绕至每个连接臂131c上的绕组131b短路，从而损坏电机13。所以在本实施方式中，插片133a需要具备两种特性，即具备一定的弹性力和一定的强度。插片133a插入间隙131d后，此时每个连接臂131c通过插片133a连接成一个整体，此时定子131的整体刚度会显著增加。
第一结合部133b和第二结合部133d用于连接插片133a，使得插片133a构成一个整体。其中，第一结合部133b具有一个围绕第一直线101分布的整流部133c。在一些实施例中，整流部133c为围绕第一直线101形成的圆环，其具有沿第一直线101径向上的延伸面，并能延伸至一个预设长度，从而沿第一直线101的径向上封闭至少部分的绕组131b和转子132。可以理解，当绕组131b缠绕至连接臂131c上且插片133a插接至连接臂131c之间的间隙时，连接臂131c、绕组131b和插片133a三者之间仍然会存在一定的空间，气体在该空间内能够自由流通。而当转子132相对定子131高速转动时，上述空间中的气体会与外界的气体流通且会被带动从而产生乱流。该乱流使得电机13在运转过程中产生较大的噪音。在本实施方式中，电机轴134连接有风扇17，风扇17位于第一结合部133b和第一罩体11之间。第一结合部133b和第一罩体11配合形成了一个相对独立的容纳空间，风扇17位于该容纳空间内。可以理解，整流部133c分割了自电机13内部到第一罩体11之间的空间，使得位于电机13内部的气流得以一种规则的状态流动，即气流能够沿着第一结合部133b上的圆环快速流动，而不会因为绕组131b和连接臂131c的原因导致气流混乱。从而减小了电机13风扇17的噪音，并增加了散热效率。
第二结合部133d连接相邻两个插片133a之间形成有卡口133e，卡口133e能卡住第二罩体12远离第一罩体11一端的构造筋122。从而使得填充件133在被固定至间隙131d的同时再次被固定至第二罩体12上，从而增加填充件133的稳定性。
风扇17正常工作时产生的噪声主要来源于偶极子噪声，其是由气流与物体相互作用的力对空间发生变化形成。如图11所示，在本实施方式中，风扇17通过优化扇叶结构，使得本实施方式中的轮毂比大于等于0.36且小于等于0.40，并使得叶片的厚度达到1mm，从而使得风扇17在电机13高速转动下，噪声显著降低。

Claims (19)

  1. 一种动力源，包括：
    电机，包括沿第一直线方向延伸的电机轴；
    所述电机包括定子和转子；
    所述定子包括用于缠绕绕组的连接臂，所述连接臂围绕所述定子分布，相邻所述连接臂之间具有间隙；
    所述电机还包括用于填充至少部分所述间隙的填充件；
    所述填充件包括：
    插片，填充至所述间隙中；
    第一结合部，连接所述插片的第一端；
    所述第一结合部围绕所述第一直线延伸并形成有整流部，所述整流部分割至少部分所述定子与所述定子之外的空间。
  2. 根据权利要求1所述的动力源，其中，
    所述整流部包括围绕所述第一直线的径向延伸的延伸面，所述延伸面能延长至预设长度。
  3. 根据权利要求1所述的动力源，其中，
    所述插片设置在所述连接臂的间隙和所述绕组之间。
  4. 根据权利要求1所述的动力源，还包括：
    第一罩体，形成可供所述电机轴通过的第一通孔；
    第二罩体，连接至所述第一罩体并形成有可供所述电机轴通过的第二通孔；
    所述第一罩体与所述第二罩体连接时形成用于容纳所述电机的容纳腔，所述第一通孔、所述第二通孔和所述电机轴具有一个平行所述第一直线的同心轴线。
  5. 根据权利要求4所述的动力源，其中，
    所述填充件还包括：第二结合部，连接所述插片的第二端。
  6. 根据权利要求5所述的动力源，其中，
    所述第二结合部形成有卡口，所述第二罩体远离所述第一罩体的一端形成有构造筋，所述卡口能固定至所述构造筋上。
  7. 根据权利要求6所述的动力源，其中，
    所述插片围绕所述第一直线均匀分布，并通过所述第一结合部和所述第二结合部连接成一个整体。
  8. 根据权利要求5所述的动力源，其中，
    所述第一罩体和第二罩体还形成有用于容纳轴承的轴承室，所述轴承用于支撑所述电机轴；当所述电机轴通过设置在所述轴承室中的轴承支撑时，所述电机轴与所述轴承具有一个平行于所述第一直线的同心轴线。
  9. 根据权利要求4所述的动力源，其中，
    所述动力源还包括连接至所述电机轴上的风扇，所述风扇位于所述第一结合部和所述第一罩体之间。
  10. 根据权利要求9所述的动力源，其中，
    所述风扇的轮毂比大于等于0.36且小于等于0.40。
  11. 根据权利要求1所述的动力源，其中，
    所述电机的转速大于等于33000r/min且小于等于39000r/min。
  12. 根据权利要求1所述的动力源，其中，
    所述插片由弹性材料制成并具有预设强度。
  13. 一种动力源，包括：
    电机，包括沿第一直线方向延伸的电机轴；
    第一罩体，形成可供所述电机轴通过的第一通孔；
    第二罩体，连接至所述第一罩体并形成有可供所述电机轴通过的第二通孔；
    所述第一罩体与所述第二罩体连接时形成用于容纳所述电机的容纳腔，所述第一通孔、所述第二通孔和所述电机轴具有一个平行所述第一直线的同心轴线。
  14. 根据权利要求13所述的动力源，其中，
    所述电机包括定子和转子；
    所述定子包括用于缠绕绕组的连接臂，所述连接臂围绕所述定子分布，相邻连接臂之间具有间隙；
    所述电机还包括用于填充至少部分所述间隙的填充件。
  15. 根据权利要求14所述的动力源，其中，
    所述填充件包括：
    插片，填充至所述间隙中；
    第一结合部，连接所述插片的第一端；
    第二结合部，连接所述插片的第二端。
  16. 根据权利要求15所述的动力源，其中，
    所述第一结合部围绕所述第一直线延伸形成有整流部，所述整流部分割至 少部分所述定子至所述第一罩体之间的空间。
  17. 根据权利要求15所述的动力源，其中，
    所述第二结合部形成有卡口，所述第二罩体远离所述第一罩体的一端形成有构造筋，所述卡口能固定至所述构造筋上。
  18. 一种动力源，包括：
    电机，包括沿第一直线方向延伸的电机轴；
    第一罩体，形成可供所述电机轴通过的第一通孔；
    第二罩体，连接至所述第一罩体并形成有可供所述电机轴通过的第二通孔；
    所述第一罩体与所述第二罩体连接时形成用于容纳所述电机的容纳腔，所述第一通孔、所述第二通孔和所述电机轴具有一个平行所述第一直线的同心轴线；
    所述电机包括定子和转子；
    所述定子包括用于缠绕绕组的连接臂，所述连接臂围绕所述定子分布，相邻连接臂之间具有间隙；
    所述电机包括用于填充至少部分所述间隙的填充件。
  19. 一种电动工具，包括如权利要求1至权利要求18任一项所述的动力源。
PCT/CN2020/079709 2019-04-01 2020-03-17 动力源和适用于动力源的电动工具 WO2020199912A1 (zh)

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CN2521813Y (zh) * 2002-02-06 2002-11-20 利大溪工业股份有限公司 马达外壳的改良结构
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CN208401647U (zh) * 2018-08-01 2019-01-18 广东威灵电机制造有限公司 永磁电机和具有其的洗衣机

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CN2521813Y (zh) * 2002-02-06 2002-11-20 利大溪工业股份有限公司 马达外壳的改良结构
CN1464620A (zh) * 2002-06-11 2003-12-31 乐金电子(天津)电器有限公司 全自动洗衣机的防电机噪音的构造
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