WO2018161645A1 - 带单向轴承直流电机 - Google Patents

带单向轴承直流电机 Download PDF

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Publication number
WO2018161645A1
WO2018161645A1 PCT/CN2017/113601 CN2017113601W WO2018161645A1 WO 2018161645 A1 WO2018161645 A1 WO 2018161645A1 CN 2017113601 W CN2017113601 W CN 2017113601W WO 2018161645 A1 WO2018161645 A1 WO 2018161645A1
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WIPO (PCT)
Prior art keywords
output shaft
bearing
motor
shaft
way bearing
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PCT/CN2017/113601
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English (en)
French (fr)
Inventor
王怀平
Original Assignee
王怀平
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Publication date
Application filed by 王怀平 filed Critical 王怀平
Priority to EP17899789.6A priority Critical patent/EP3553924B1/en
Priority to ES17899789T priority patent/ES2944077T3/es
Publication of WO2018161645A1 publication Critical patent/WO2018161645A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/108—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction clutches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12—Machines characterised by the modularity of some components
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/118—Structural association with clutches, brakes, gears, pulleys or mechanical starters with starting devices
    • H02K7/1185—Structural association with clutches, brakes, gears, pulleys or mechanical starters with starting devices with a mechanical one-way direction control, i.e. with means for reversing the direction of rotation of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors

Definitions

  • the utility model relates to a direct current motor, in particular to a direct current motor with a one-way bearing.
  • DC motor is a rotating electric machine that can convert DC electric energy into mechanical energy. It is mainly used for driving various electric products. Due to a wide range of applications, DC motors can be subdivided into various categories, and according to the number of output shafts. Differently, DC motors can be divided into single output shaft DC motors and dual output shaft DC motors. Among them, dual output shaft DC motors, as the name implies, are DC motors that can output power bidirectionally.
  • the dual output shaft DC motor is usually a motor shaft directly extending from both ends of the casing, and the positive and negative rotation of the motor shaft makes the bidirectional output power of the DC motor both in the same direction and synchronous;
  • a dual output shaft DC motor is used as the reversing drive power, one end of the motor shaft must be guaranteed when the motor shaft is rotated forward and reverse.
  • the other end of the output remains stationary, that is, the dual output shaft needs to be rotated for forward and reverse rotation output, and the conventional dual output shaft DC motor is obviously difficult to do.
  • the technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a one-way bearing DC motor capable of bidirectional rotation output.
  • a DC motor with a one-way bearing comprising a casing, a motor shaft in the casing, and a front output shaft and a rear output shaft respectively located at the two ends of the casing, wherein the front end of the motor shaft and the inner end of the front output shaft are disposed There is a front one-way bearing, and a rear one-way bearing is arranged between the rear end of the motor shaft and the inner end of the rear output shaft, and the front and rear one-way bearings are in an opposite mounting relationship; the forward rotation of the motor shaft Before the bearing is driven, the output shaft is synchronously rotated forward, and then the output shaft remains stationary, or the reverse rotation of the motor shaft is driven by the one-way bearing, and the output shaft is synchronously reversed and forwarded. The output shaft remains stationary.
  • the front one-way bearing is embedded and fixed on the inner end of the front output shaft, and the front end of the motor shaft is rotatably supported in the front one-way bearing;
  • the rear one-way bearing is embedded and fixed on the inner end of the rear output shaft, and the rear end of the motor shaft The rotation is supported in the rear one-way bearing.
  • the inner end of the front output shaft is provided with a blind hole with an opening inward, and the front one-way bearing is embedded and fixed in the blind hole of the bearing; the inner end of the rear output shaft is also provided with a blind hole with an opening inward.
  • the rear one-way bearing is embedded and fixed in the blind hole of the bearing.
  • the motor shaft, the front output shaft and the rear output shaft are all on the same axial center line.
  • the two ends of the casing are respectively provided with a front end cover and a rear end cover, the front end cover is provided with a front bearing cavity, and the rear end cover is provided with a rear bearing cavity.
  • the front end of the front output shaft, the front one-way bearing and the front end of the motor shaft are all disposed in the front bearing cavity, and the front bearing cavity is further provided with a rolling bearing for rotating the front end of the output shaft and the front end of the motor shaft;
  • the rear end of the output shaft, the rear one-way bearing and the rear end of the motor shaft are disposed in the rear bearing cavity, and the rear bearing cavity is further provided with a rolling bearing that rotates and supports the inner end of the output shaft and the rear end of the motor shaft.
  • the front bearing cavity is provided with an oil seal sealing the inner end of the output shaft, the oil seal is mounted on the outer side of the rolling bearing at the inner end of the output shaft before the rotation support;
  • the rear bearing cavity is provided with an oil seal sealing the inner end of the output shaft, the oil seal Installed on the outside of the rolling bearing at the inner end of the output shaft after the rotation support.
  • the front bearing cavity is an integral chamber structure extending from the middle of the inner surface of the front end cover to the inner casing; the rear bearing cavity is an integral cavity extending from the middle of the inner surface of the rear end cover to the inner casing. Room structure.
  • the outer end of the front output shaft and the outer end of the rear output shaft are provided with an impeller, and the impellers on the outer ends of the front and rear output shafts rotate in opposite directions.
  • a stator, a brush and an armature constituting a DC motor are also disposed in the casing.
  • the utility model mainly provides a front and a rear single installation between the front end of the motor shaft and the inner end of the front output shaft, the rear end of the motor shaft and the inner end of the rear output shaft.
  • To the bearing thereby realizing the forward rotation of the motor shaft before the forward rotation of the motor shaft, and then the output shaft remains stationary, or the output shaft is synchronously reversed after the reverse rotation of the motor shaft, and the power output mode of the front output shaft remains stationary, that is,
  • the positive and negative rotation of the motor shaft realizes the output purpose of the front and rear output shaft wheel correction and reverse rotation, so the improved one-way bearing DC motor can be better applied to the suction cleaner type with the above power output purpose.
  • the various electric products also expand the range of use of DC motors.
  • Figure 1 is a schematic cross-sectional view of the utility model.
  • Fig. 2 is an exploded perspective view of Fig. 1;
  • the DC motor with one-way bearing relates to a power driving device for realizing the bidirectional rotation of the front and rear output shafts by the positive and negative rotation of the motor shaft.
  • the left side of the view can be set to the front and the right side of the view can be set to the rear as shown in FIG. 1; of course, the DC motor is also different according to the actual use occasion. It can be placed vertically or placed obliquely, which does not affect the structural description of the embodiment.
  • the structure of the DC motor with one-way bearing is mainly composed of the casing 4, the motor shaft 6, the front output shaft 1, the rear output shaft 10, the front one-way bearing 3, the rear one-way bearing 8, the front end cover 15, and the rear end cover 12, etc. Composition.
  • the casing 4 is a horizontal cylindrical structure, and the motor shaft 6 is horizontally mounted horizontally in the casing 4, and constitutes a structure together with the stator, the brush 7, the armature 5 and the like in the casing.
  • a complete DC motor is provided, and a front end cover 15 and a rear end cover 12 are respectively mounted at both ends of the casing 4 to collectively enclose the above components.
  • the front end cover 15 is provided with a front bearing cavity 14 which is an integral chamber structure extending horizontally from the inner surface of the inner surface of the front end cover 15 to the inside of the casing 4, and the rear end cover 12 is also provided with The front end cover 15 is structurally identical in design to the rear bearing cavity 13.
  • the front output shaft 1 and the rear output shaft 10 are respectively mounted on the two ends of the casing 4; wherein the inner end of the front output shaft 1 extends into the front bearing cavity 14, and the front end of the corresponding motor shaft 6 also extends into the front bearing cavity 14
  • the front one-way bearing 3 is disposed between the front end of the motor shaft 6 and the inner end of the front output shaft 1, and the specific structure is: the inner end of the front output shaft 1 is provided with an open bearing 16 with an opening inward, and the front one-way The bearing 3 is embedded and fixed in the blind hole 16 of the bearing, and the front end of the motor shaft 6 is rotatably supported in the front one-way bearing 3; in addition, the inner end of the output shaft 1 and the motor shaft 6 are provided in the front bearing cavity 14 with the rotation support.
  • the rolling bearing 2 at the front end is selected from the 608 bearing, and is further provided with an oil seal 9 for sealing the inner end of the front output shaft 1, which is mounted outside the rolling bearing 2 at the inner end of the output shaft 1 before the
  • the front one-way bearing 3 is a forward one-way bearing
  • the front output shaft 1 cannot be rotated, and the front output shaft remains stationary.
  • the front one-way bearing 3 is a reverse one-way bearing
  • Motor shaft 6 forward rotation will bring Before the movement, the output shaft 1 rotates synchronously.
  • the front output shaft cannot be rotated, and the front output shaft 1 remains stationary.
  • the inner end of the rear output shaft 10 extends into the rear bearing cavity 13, and the rear end of the corresponding motor shaft 6 also extends into the rear bearing cavity 13, and the two ends are connected by the rear one-way bearing 8, and the inner end of the rear output shaft 10 is
  • the structural design and installation of the rear one-way bearing 8 and the rear end of the motor shaft 6 are exactly the same as those of the front part, so the description will not be repeated here.
  • the current output shaft 1 is connected to the front end of the motor shaft 6 through the front one-way bearing 3, and the rear output shaft 10 is connected to the rear end of the motor shaft 6 through the rear one-way bearing 8, and the motor shaft 6, the front output shaft 1 and the rear output shaft 10 are all in the same On the axis of the shaft; in addition, the front and rear one-way bearings must be in the opposite direction of rotation, so that the positive and negative rotation of the front and rear output shafts can be realized when the motor shaft is rotating forward and backward.
  • the outer end of the front output shaft 1 and the outer end of the rear output shaft 10 may be equipped with output fittings according to the actual use occasion of the DC motor, such as the impeller 11 shown in Fig. 1 and Fig. 2, and may also be a clutch, a shaft, etc.
  • the impeller on the outer end of the rear output shaft rotates in the opposite direction, so the DC motor is more suitable for use in the suction cleaner of the underwater cleaning operation of the swimming pool, thereby driving the suction cleaner to complete the reversing under water.
  • the one-way bearing 3 is a reverse one-way bearing
  • the rear one-way bearing 8 is a forward one-way bearing as an example.
  • the working process is as follows: when the motor shaft 6 is rotating forward, before the front one-way bearing 3 is driven The output shaft 1 rotates synchronously, and the rear one-way bearing 8 and the motor shaft 6 are in the same forward rotation state, so the rear output shaft 10 remains stationary; when the motor shaft 6 is reversed, the front one-way bearing 3 and the motor shaft 6 are both In the same direction of reversal, the front output shaft 1 remains stationary, and the rear one-way bearing 8 will drive the output shaft 10 in reverse.

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

Abstract

一种带单向轴承直流电机，主要适用于各种电动产品的驱动上，其结构包括机壳（4）、电机轴（6）、前输出轴（1）和后输出轴（10）等，主要是通过在电机轴（6）前端与前输出轴（1）内端之间、电机轴（6）后端与后输出轴（10）内端之间对应增设了转动方向相反安装的前、后单向轴承（3、8），从而实现了电机轴（6）的正转带动前输出轴（1）同步正转而后输出轴（10）保持静止，或电机轴（6）的反转带动后输出轴（10）同步反转而前输出轴（1）保持静止的动力输出模式，即通过电机轴（6）的正、反转动来实现前、后输出轴（1、10）轮换正、反转动的输出目的，故改进后的单向轴承直流电机能更好的适用于吸污清洁器类具有上述动力输出目的的各种电动产品上，也扩大了直流电机的使用范围。

Description

带单向轴承直流电机 技术领域
本实用新型涉及一种直流电机，具体是指带单向轴承直流电机。
背景技术
众所周知，直流电机是指能将直流电能转换成机械能的旋转电机，它主要适用于各种电动产品的驱动上，由于应用场合广泛，直流电机可细分为各种类别，而根据输出轴的数量不同，直流电机可分为单输出轴直流电机和双输出轴直流电机，其中的双输出轴直流电机，顾名思义是指能够将动力双向输出的直流电机。
目前，双输出轴直流电机通常是一根电机轴直接从机壳两端伸出，则电机轴的正、反转动使得直流电机的双向输出动力都是同向、同步的；而在某些特殊电动产品上，例如用于游泳池水下清洁作业的吸污清洁器，其上如果应用双输出轴直流电机作为换向驱动动力，则在电机轴正、反转动双向输出时，必须保证一端输出另一端保持静止，即双输出轴需要轮换进行正、反转动输出，而传统的双输出轴直流电机显然是难以做到的。
因此，如果能够设计一款本身就能实现一端输出另一端保持静止，或一端保持静止另一端输出的双输出轴直流电机，无疑是非常有必要的，不但解决了上述吸污清洁器的结构设计问题，也肯定能够适用于需要同样输出目的的各种电动产品上，扩大了使用范围。
发明内容
本实用新型所要解决的技术问题在于克服现有技术的缺陷而提供一种能双向轮换输出的带单向轴承直流电机。
本实用新型的技术问题通过以下技术方案实现：
一种带单向轴承直流电机，包括机壳、机壳内的电机轴、及分别位于机壳两端的前输出轴和后输出轴，所述的电机轴前端与前输出轴内端之间设有前单向轴承，电机轴后端与后输出轴内端之间设有后单向轴承，该前、后单向轴承为转动方向相反的安装关系；所述电机轴的正转经前单向轴承带动前输出轴同步正转而后输出轴保持静止，或电机轴的反转经后单向轴承带动后输出轴同步反转而前输 出轴保持静止。
所述的前单向轴承嵌装固定在前输出轴内端，电机轴前端转动支承在前单向轴承内；所述的后单向轴承嵌装固定在后输出轴内端，电机轴后端转动支承在后单向轴承内。
所述的前输出轴内端设有开口向内的轴承盲孔，前单向轴承嵌装固定在该轴承盲孔内；所述的后输出轴内端也设有开口向内的轴承盲孔，后单向轴承嵌装固定在该轴承盲孔内。
所述的电机轴、前输出轴和后输出轴均处于同一轴心线上。
所述的机壳两端分别设有前端盖和后端盖，该前端盖上设有前轴承腔，后端盖上设有后轴承腔。
所述的前输出轴内端、前单向轴承和电机轴前端均设置在前轴承腔内，该前轴承腔内还设有转动支承前输出轴内端和电机轴前端的滚动轴承；所述的后输出轴内端、后单向轴承和电机轴后端均设置在后轴承腔内，该后轴承腔内还设有转动支承后输出轴内端和电机轴后端的滚动轴承。
所述的前轴承腔内设有密封前输出轴内端的油封，该油封安装在转动支承前输出轴内端的滚动轴承外侧；所述的后轴承腔内设有密封后输出轴内端的油封，该油封安装在转动支承后输出轴内端的滚动轴承外侧。
所述的前轴承腔是由前端盖内表面中部向机壳内延伸而成的一体腔室结构；所述的后轴承腔是由后端盖内表面中部向机壳内延伸而成的一体腔室结构。
所述的前输出轴的外端和后输出轴的外端均设有叶轮，前、后输出轴外端上的叶轮旋转方向相反。
所述的机壳内还设有构成直流电机的定子、电刷、电枢。
与现有技术相比，本实用新型主要是通过在电机轴前端与前输出轴内端之间、电机轴后端与后输出轴内端之间对应设置了转动方向相反安装的前、后单向轴承，从而实现了电机轴的正转带动前输出轴同步正转而后输出轴保持静止，或电机轴的反转带动后输出轴同步反转而前输出轴保持静止的动力输出模式，即通过电机轴的正、反转动来实现前、后输出轴轮换正、反转动的输出目的，故改进后的单向轴承直流电机能更好的适用于吸污清洁器类具有上述动力输出目的的各种电动产品上，也扩大了直流电机的使用范围。
附图说明
图1为本实用新型的剖视结构示意图。
图2为图1的立体分解图。
具体实施方式
下面将按上述附图对本实用新型实施例再作详细说明。
如图1、图2所示，1.前输出轴、2.滚动轴承、3.前单向轴承、4.机壳、5.电枢、6.电机轴、7.电刷、8.后单向轴承、9.油封、10.后输出轴、11.叶轮、12.后端盖、13.后轴承腔、14.前轴承腔、15.前端盖、16.轴承盲孔。
带单向轴承直流电机，涉及一种通过电机轴的正、反转动来实现前、后输出轴的双向轮换正、反转动输出目的的动力驱动装置。
本实施例涉及的直流电机为横放使用状态，则按照图1所示可将视图左侧设定为前，视图右侧设定为后；当然，根据实际使用场合的不同，该直流电机也完全可以竖直放置使用或斜着放置使用，这些都不会影响本实施例的结构描述。
带单向轴承直流电机的结构主要是由机壳4、电机轴6、前输出轴1、后输出轴10、前单向轴承3、后单向轴承8、前端盖15和后端盖12等构成。
所述的机壳4是一个横放的圆柱筒状结构，电机轴6水平横置安装在机壳4内，并与机壳内的定子、电刷7、电枢5等结构共同构成了一个完整的直流电机，而前端盖15和后端盖12分别安装在机壳4两端，以将上述部件共同封闭在内。
所述的前端盖15上设有前轴承腔14，该前轴承腔是由前端盖15内表面中部向机壳4内水平延伸而成的一体腔室结构，而后端盖12上也设有与前端盖15结构设计相同的后轴承腔13。
所述的前输出轴1和后输出轴10分别安装在机壳4两端；其中，前输出轴1内端伸入前轴承腔14内，相应的电机轴6前端也伸入前轴承腔14内，并在电机轴6前端与前输出轴1内端之间设有前单向轴承3，具体结构为：前输出轴1内端设有开口向内的轴承盲孔16，而前单向轴承3嵌装固定在该轴承盲孔16内，而电机轴6前端将转动支承在前单向轴承3内；另外，前轴承腔14内设有转动支承前输出轴1内端和电机轴6前端的滚动轴承2，该滚动轴承选用608轴承，还设有密封前输出轴1内端的油封9，该油封安装在转动支承前输出轴1内端的滚动轴承2外侧。
由于前输出轴1内端与电机轴6前端通过前单向轴承3相连接，则电机轴6的正、反转可能存在两种情况，即前单向轴承3为正转单向轴承，则电机轴6正转将无法带动前输出轴1转动，前输出轴保持静止，只有电机轴6反转才能带动前输出轴1同步反转；而前单向轴承3为反转单向轴承，则电机轴6正转将带 动前输出轴1同步正转，电机轴6反转就无法带动前输出轴转动，前输出轴1保持静止。
后输出轴10内端伸入后轴承腔13内，相应的电机轴6后端也伸入后轴承腔13内，两者之间通过后单向轴承8相连接，后输出轴10内端、后单向轴承8和电机轴6后端的结构设计、安装方式与前部完全一样，故此处不再重复描述。
当前输出轴1通过前单向轴承3连接电机轴6前端、后输出轴10通过后单向轴承8连接电机轴6后端，该电机轴6、前输出轴1和后输出轴10均处于同一轴心线上；另外，前、后单向轴承必须为转动方向相反的安装关系，这样才能在电机轴正、反转动时，可实现前、后输出轴的正、反转动轮换输出。
前输出轴1外端、后输出轴10外端可根据该直流电机的实际使用场合需要安装输出配件，如图1、图2所示的叶轮11，也可以是离合器、轴等，而前、后输出轴外端上的叶轮旋转方向相反，故这种直流电机比较适用于游泳池水下清洁作业的吸污清洁器上使用，从而驱动吸污清洁器在水下完成换向。
本实用新型以前单向轴承3为反转单向轴承，后单向轴承8为正转单向轴承为例，其工作过程如下：当电机轴6正转，则经前单向轴承3带动前输出轴1同步正转，后单向轴承8与电机轴6均为同向的正转状态，故后输出轴10保持静止；当电机轴6反转，前单向轴承3与电机轴6均为同向的反转状态，故前输出轴1保持静止，而后单向轴承8将带动后输出轴10同步反转。
以上所述仅是本实用新型的具体实施例，本领域技术人员应该理解，任何与该实施例等同的结构设计，均应包含在本实用新型的保护范围之内。

Claims (10)

  1. 一种带单向轴承直流电机，包括机壳(4)、机壳内的电机轴(6)、及分别位于机壳两端的前输出轴(1)和后输出轴(10)，其特征在于所述的电机轴(6)前端与前输出轴(1)内端之间设有前单向轴承(3)，电机轴(6)后端与后输出轴(10)内端之间设有后单向轴承(8)，该前、后单向轴承为转动方向相反的安装关系；所述电机轴(6)的正转经前单向轴承(3)带动前输出轴(1)同步正转而后输出轴(10)保持静止，或电机轴(6)的反转经后单向轴承(8)带动后输出轴(10)同步反转而前输出轴(1)保持静止。
  2. 根据权利要求1所述的带单向轴承直流电机，其特征在于所述的前单向轴承(3)嵌装固定在前输出轴(1)内端，电机轴(6)前端转动支承在前单向轴承(3)内；所述的后单向轴承(8)嵌装固定在后输出轴(10)内端，电机轴(6)后端转动支承在后单向轴承(8)内。
  3. 根据权利要求2所述的带单向轴承直流电机，其特征在于所述的前输出轴(1)内端设有开口向内的轴承盲孔(16)，前单向轴承(3)嵌装固定在该轴承盲孔(16)内；所述的后输出轴(10)内端也设有开口向内的轴承盲孔(16)，后单向轴承(8)嵌装固定在该轴承盲孔(16)内。
  4. 根据权利要求1所述的带单向轴承直流电机，其特征在于所述的电机轴(6)、前输出轴(1)和后输出轴(10)均处于同一轴心线上。
  5. 根据权利要求1所述的带单向轴承直流电机，其特征在于所述的机壳(4)两端分别设有前端盖(15)和后端盖(12)，该前端盖上设有前轴承腔(14)，后端盖上设有后轴承腔(13)。
  6. 根据权利要求5所述的带单向轴承直流电机，其特征在于所述的前输出轴(1)内端、前单向轴承(3)和电机轴(6)前端均设置在前轴承腔(14)内，该前轴承腔内还设有转动支承前输出轴(1)内端和电机轴(6)前端的滚动轴承(2)；所述的后输出轴(10)内端、后单向轴承(8)和电机轴(6)后端均设置在后轴承腔(13)内，该后轴承腔内还设有转动支承后输出轴(10)内端和电机轴(6)后端的滚动轴承(2)。
  7. 根据权利要求6所述的带单向轴承直流电机，其特征在于所述的前轴承腔(14)内设有密封前输出轴(1)内端的油封(9)，该油封安装在转动支承前 输出轴(1)内端的滚动轴承(2)外侧；所述的后轴承腔(13)内设有密封后输出轴内端的油封(9)，该油封安装在转动支承后输出轴(10)内端的滚动轴承(2)外侧。
  8. 根据权利要求5所述的带单向轴承直流电机，其特征在于所述的前轴承腔(14)是由前端盖(15)内表面中部向机壳(4)内延伸而成的一体腔室结构；所述的后轴承腔(13)是由后端盖(12)内表面中部向机壳(4)内延伸而成的一体腔室结构。
  9. 根据权利要求1所述的带单向轴承直流电机，其特征在于所述的前输出轴(1)的外端和后输出轴(10)的外端均设有叶轮(11)，前、后输出轴外端上的叶轮旋转方向相反。
  10. 根据权利要求1所述的带单向轴承直流电机，其特征在于所述的机壳(4)内还设有构成直流电机的定子、电刷(7)、电枢(5)。
PCT/CN2017/113601 2017-03-08 2017-11-29 带单向轴承直流电机 WO2018161645A1 (zh)

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