CN109611463A - A method of control electromagnetic clutch - Google Patents
A method of control electromagnetic clutch Download PDFInfo
- Publication number
- CN109611463A CN109611463A CN201811612448.3A CN201811612448A CN109611463A CN 109611463 A CN109611463 A CN 109611463A CN 201811612448 A CN201811612448 A CN 201811612448A CN 109611463 A CN109611463 A CN 109611463A
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- Prior art keywords
- electromagnetic clutch
- movable disk
- transmission gear
- coil
- place
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
- F16D27/02—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings
- F16D27/09—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings and with interengaging jaws or gear-teeth
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
- F16D27/14—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The present invention relates to a kind of methods for controlling electromagnetic clutch.The electromagnetic clutch includes coil, movable disk, coil support portion, transmission gear, shell, axis, return element and limited block.The method of the control electromagnetic clutch is controlled according to the demand of disconnection and engagement to electromagnetic clutch and to the electric current of the coil of input electromagnetic clutch, to overcome the problems, such as electromagnetic clutch segregation lag, to realize the control of more accurate electromagnetic clutch.
Description
Technical field
Electromagnetic clutch field of the present invention especially belongs to the electromagnetic clutch field of vehicle or dynamic power machine, specifically relates to
A kind of and method for controlling electromagnetic vehicle clutch.
Background technique
Electromagnetic clutch is widely used in every field, especially in transmission for vehicles.Electricity can be used in the transmission
Magnet clutch is to be shifted gears, be cut off power transmitting etc..These operations need extremely to be accurately controlled electromagnetic clutch,
Speed changer or vehicle is enabled to execute corresponding function according to the wish of driver.But electromagnetic clutch in the prior art
Device has that control is inaccurate, specifically, after the electric current of electromagnetic clutch is led in removing, it is surplus due to existing
Magnetic causes electromagnetic clutch can not timely return.
Summary of the invention
It is an object of the invention to propose a kind of method for controlling electromagnetic clutch, to solve electromagnetic clutch segregation lag
Problem, to realize the control of more accurate electromagnetic clutch.
It is realized especially by following technological means:
A method of control electromagnetic clutch, the electromagnetic clutch includes coil, movable disk, coil support portion, driving cog
Wheel, shell, axis, return element and limited block；Wherein, the movable disk is supported by the axis and relative to the axis along axis side
To sliding, to engage and separate with the transmission gear, the movable disk has extension and head, and the extension is for branch
The coil support portion is supportted, and one end of the extension is provided with end-tooth, the extension is arranged in the head
The other end and the diameter having are greater than the diameter of the extension；The coil support portion is fixedly attached to shell, and
The coil support portion is provided with the cavity for accommodating multiturn coil in the end face on the head, wherein the activity
Disk overcomes the pressure of the return element under the action of coil and axially slides；The transmission gear setting exists
On the axis and with the axis relative rotation, the transmission gear has the end face that is meshed with the end-tooth of the extension
Tooth, by the engagement of the end-tooth of the end-tooth and extension of transmission gear and to separate and make movable disk and transmission gear selection
The engagement and separation of property；The limited block is arranged between movable disk and transmission gear and is fixedly connected with the axis, to limit
The position of movable disk and transmission gear；Be additionally provided with cavity in one end of the extension, and the cavity with the limit
Position block forms the space for accommodating the return element；
It is described control electromagnetic clutch method the following steps are included:
S1, setting electromagnetic clutch input the predetermined threshold of the rotational speed difference between output；
S2 judges the state that electromagnetic clutch is presently in, if electromagnetic clutch is in an off state, carries out step S3, such as
Fruit electromagnetic clutch is in engagement state, carries out step S11,
S3 judges whether to need to engage electromagnetic clutch；If necessary to engage electromagnetic clutch, then step S4 is carried out, if not
It needs to engage electromagnetic clutch, then proceeds to step S10；
S4, judges whether the rotational speed difference between electromagnetic clutch input and output is less than predetermined threshold, if electromagnetic clutch is defeated
Rotational speed difference between entering and exporting is greater than predetermined threshold, then method carries out step S5, if electromagnetic clutch input and output
Between rotational speed difference be less than predetermined threshold, then method carry out step S6；
S5 adjusts the revolving speed of electromagnetic clutch input, so that the rotational speed difference between electromagnetic clutch input and output is less than predetermined
Threshold value returns to step S4 after the rotational speed difference is adjusted；
S6 is passed through electric current i to electromagnetic clutch1, so that movable disk is mobile towards transmission gear under the attraction of the coil of energization；
Then step S7 is carried out；
S7, judges whether the movable disk of electromagnetic clutch engages in place with transmission gear, if electromagnetic clutch engagement is in place,
Method carries out step S9 and carries out step S8 if electromagnetic clutch is not engaged to position,
S8 continues to be passed through electromagnetic clutch electric current i1, step S7 is returned to, so that the electric current being passed through makes coil generation be enough activity
The mobile attraction in place of disk, until electromagnetic clutch engages in place；
S9 makes the electric current for being passed through electromagnetic clutch remain i2, wherein i1With i2Same phase, and i1>i2；
S10, method terminate；
S11, it is determined whether it needs to disconnect electromagnetic clutch, if you do not need to disconnecting electromagnetic clutch, then carries out step S9, if
It needs to disconnect electromagnetic clutch, then proceeds to step S12；
S12, the torque that will enter into electromagnetic clutch are decreased to predetermined value, wherein and the predetermined value is close to zero, then, into
Row step S13；
S13 cuts off the electric current being passed through in electromagnetic clutch coil, then, carries out step S14；
S14, judges whether the movable disk of electromagnetic clutch and transmission gear disconnect in place, if electromagnetic clutch disconnects in place,
Then then carries out step S10 and carry out step S15 if electromagnetic clutch does not disconnect in place；
S15 is passed through electric current i to coil3Predetermined hold-time, wherein i3With i2Reverse phase, and i3< i2, then, repeat step
S14 then transfers to carry out step S10 in place until electromagnetic clutch disconnects.
Effect of the invention is that:
1, by the way that limited block is arranged between the movable disk and transmission gear of electromagnetic clutch, on the one hand, can prevent movable disk from moving
Dynamic is more than predetermined position, and causes the end-tooth of movable disk excessively to engage with the end-tooth of transmission gear, while also ensuring work
Predetermined gap is able to maintain between Moving plate and coil support portion；On the other hand, it after movable disk is engaged with transmission gear, prevents from passing
Undesirable axial movement occurs in transmission force for moving gear.
2, when control disconnects electromagnetic clutch, by being passed through of short duration reverse phase low current to electromagnetic clutch, realize anti-
Phase low current offsets each other with the remanent magnetism that remains in movable disk, and then controllable electromagnetic clutch can be in the work of return element
The more rapid return under.
3, when the movable disk of electromagnetic clutch and transmission gear are not engaged to, bigger electric current is passed through to clutch,
To realize being quickly engaged in place for electromagnetic clutch.
Detailed description of the invention
The structural schematic diagram of section when Fig. 1 is electromagnetic clutch engagement of the invention.
The schematic diagram of the structure of section when Fig. 2 is electromagnetic clutch separation of the invention.
Fig. 3 is the flow chart of the method for control electromagnetic clutch of the invention.
Wherein: 1- coil, 2- snap ring, 3- movable disk, the head 3a-, 3b- extension, 4- coil support portion, 5- shell, 6-
Transmission gear, 7- axis, 8- return element, 9- limited block, 10- spline.
Specific embodiment
Referring to Fig.1, structural schematic diagram when engaging according to the electromagnetic clutch of the application is shown.Electromagnetic clutch includes
Coil 1, movable disk 3, coil support portion 4, shell 5, transmission gear 6, axis 7, return element 8 and limited block 9.
Movable disk 3 has head 3a and extension 3b.Movable disk 3 is connect for example, by spline with axis 7, so that axis 7 can prop up
Movable disk 3 is supportted, and movable disk 3 can be slided along the axial direction of axis 7.The end face of extension 3b is provided with end-tooth, and
The end face of extension 3b by the engagement of end-tooth and separation and the engagement of 6 selectivity of transmission gear and can separate, thus will
The power of transmission gear 6 is transmitted to axis 7.It is also set up in the end face of extension 3b for accommodating the fluted of return element 8.It returns
Against in a groove, the other end of return element 8 abuts against limited block 9 for one end of bit unit 8.Return element 8 can be for example
The element of disc spring or wave spring etc..
Coil support portion 4 circlewise and is fixedly attached on fixed shell 5.Coil support portion 4 passes through prolonging for movable disk
Extending portion 3b is simultaneously arranged on the side of extension 3b of movable disk.In coil support portion 4 in the end face of the head 3a of movable disk 3
It is provided with continuous cavity, so that multiturn coil 1 can wind and be contained in cavity.Meanwhile coil support portion 4 can also prevent line
Enclose 1 leakage field.Cavity can have various shape, as long as enough coils 1 for attracting movable disk 3 can be accommodated.
Transmission gear 6 is arranged on axis 7, and can be with 7 relative rotation of axis by sliding bearing or needle bearing etc..
Transmission gear 6 is the gear with end-tooth.By the engagement of the end-tooth of the end-tooth and extension 3b of transmission gear 6 and point
From and make the engagement of 6 selectivity of movable disk 3 and transmission gear and separate, so that the power of transmission gear 6 is transmitted to axis 7.
Limited block 9 is fixedly connected with axis 7, and is arranged between movable disk 3 and transmission gear 6, to limit 3 He of movable disk
The position of transmission gear 6.Specifically, on the one hand, when movable disk 3 is moved to the left under the attraction effect of the coil 1 of energization
When, it is more than predetermined position that limited block 9, which can prevent movable disk 3 mobile, and leads to the end-tooth of movable disk 3 and the end of transmission gear 6
Face tooth excessively engages, while also ensuring and being able to maintain predetermined gap between movable disk 3 and coil support portion 4.On the other hand, work as work
After Moving plate 3 is engaged with transmission gear 6, prevent transmission gear 6 from undesirable axial movement occurring in transmission force.Limited block 9
It can be fixedly connected by modes such as interference, screw thread or welding with axis 7.
As shown in Figure 1, when movable disk 3 is engaged with transmission gear 6, between the head 3a and coil support portion 4 of movable disk 3
With predetermined gap t1(about in 0.1mm between 0.6mm).As shown in Fig. 2, when movable disk 3 is separated with transmission gear 6,
There is predetermined gap t2 between the head 3a and coil support portion 4 of movable disk 3.Wherein, the end-tooth of t2 > t1+ transmission gear 6
Bonding length between the end-tooth of extension 3b.Predetermined gap t2 can be limited by snap ring 2.
When needing to engage movable disk 3 and transmission gear 6 (for example, it is desired to which the power between engine and speed changer connects
Connect), control flows to the electric current of coil 1, so that coil 1 can overcome the resistance of return element 8 to the attraction of movable disk 3, thus
Make the end-tooth of extension 3b and the end face indented joint of transmission gear 6, at this point, the power of transmission gear 6 is transmitted by movable disk 6
Other elements are transmitted to axis 7, and then by axis 7.
When do not need engagement movable disk 3 and when transmission gear 6 (for example, speed changer execute shift or interrupt engine with
Being connected by power between speed changer), stop supplying the electric current of coil 1.At this point, due to remaining remanent magnetism in electromagnetic clutch,
And when the attraction generated by remanent magnetism is greater than the resistance of return element 8, lead to the separation meeting of movable disk 3 Yu transmission gear 6
Delay in turn results in the generation appreciable pause and transition in rhythm or melody sense of driver for example on automobile.
Referring to Fig. 3, specially a kind of method for controlling electromagnetic clutch, to solve the problems, such as electromagnetic clutch segregation lag.
Control method starts in step S1, then judges the state that electromagnetic clutch is presently in step S2.Work as clutch
When device is in an off state, proceed to step S3.
In step S3, judge whether to need to engage clutch.For example, hybrid vehicle is directed to, when needing to use engine
It needs to engage clutch when charging to traction battery, alternatively, being directed to electric vehicle, the needs when driver shifts gears
Engage clutch.If necessary to engage clutch, then judge clutch input with output (for example, transmission gear 6 in step S4
With movable disk 3) between rotational speed difference whether be less than predetermined threshold (for example, 50rpm).Specifically, for example, being directed to hybrid power
Vehicle, the revolving speed of transmission gear 6 can correspond to wheel of vehicle revolving speed, and the revolving speed of movable disk 3 can correspond to engine or motor
Revolving speed.
When the rotational speed difference that clutch inputs between output is greater than predetermined threshold (for example, 50rpm), method proceeds to step
The revolving speed of clutch input is adjusted in step S5 in rapid S5, so that the rotational speed difference between clutch input and output is less than predetermined
Threshold value, for example, the revolving speed of transmission gear 6 or axis 7 can be adjusted by adjusting the revolving speed of engine or motor.Work as clutch
When the rotational speed difference inputted between output is less than predetermined threshold (for example, 50rpm), method proceeds to step S6, in step S6, to
Electromagnetic clutch is passed through electric current i1, so that the movable disk 3 of clutch is moved to and transmission gear 6 under the attraction of hot-wire coil 1
The position of engagement.
In step S7, judge whether the movable disk 3 of clutch engages in place with transmission gear 6.Specifically, can be by setting
The position sensor in movable disk 3 is set to judge whether movable disk engages in place with transmission gear 6.If clutch is joined to
Position, then method proceeds to step S9, in step S9, the electric current for being passed through clutch is made to remain i2, wherein i1>i2.If clutch
The movable disk 3 and transmission gear 6 of device are not engaged to position, then continue to be passed through clutch electric current i1, so that the electric current being passed through makes line
Circle 1, which generates, is enough the mobile attraction in place of movable disk 3.Optionally, if the movable disk 3 of clutch does not connect with transmission gear 6
It closes in place, also available step S8 ' (not shown) alternative steps S8 is passed through greater than i clutch in step S8 '1Electric current i0, with
It is quickly engaged clutch in place.
If judging to proceed to step S11 when clutch is in engagement state in step S2.In step S11, determination is
It is no to need cut-off clutch.For example, being directed to hybrid vehicle, needed when not needing to charge to traction battery with engine
Clutch is disconnected, alternatively, being directed to electric vehicle, needs cut-off clutch when driver, which shifts gears, to complete.If you do not need to disconnecting
Clutch then proceeds to step S9, and the electric current for being passed through clutch is made to remain i2.If necessary to cut-off clutch, then proceed to
Step S12.In step S12, the torque that will enter into clutch is decreased to predetermined value (for example, close to zero).Later, in step
S13 cuts off the electric current being passed through in clutch coil.Also, in step S14, judge the movable disk 3 and transmission gear 6 of clutch
Whether disconnect in place.Specifically, can be judged by the position sensor being arranged in movable disk 3 movable disk whether with transmission
Gear 6 disconnects in place.If clutch disconnects in place, method terminates in step S10.But under normal conditions, due in coil
There are remanent magnetism, and the remanent magnetism is as the time is gradually reduced, therefore, even if cutting is passed through the electric current of coil, by the remanent magnetism
The attraction to movable disk generated can also make movable disk and transmission gear remain engaged with the of short duration time, generate therefrom undesirable
Clutch it is of short duration engagement or clutch separation delay.If carried out determining that clutch does not disconnect in place in step S14
To step S15, in step S15, electric current i is passed through to coil3Predetermined hold-time, wherein i3With i1And i2Reverse phase, and i3< i2。
Then, step S14 is repeated, until clutch disconnects in place.
Claims (6)
1. a kind of method for controlling electromagnetic clutch, which is characterized in that the electromagnetic clutch includes coil, movable disk, coil
Support portion, transmission gear, shell, axis, return element and limited block；Wherein,
The movable disk is supported by the axis and can axially be slided relative to the axis, to connect with the transmission gear
It closes and separation, the movable disk has extension and head, the extension is used to support the coil support portion, and described
One end of extension is provided with end-tooth, the other end of the extension is arranged in the head and the head have it is straight
Diameter is greater than the diameter of the extension；
The coil support portion is fixedly attached to shell, and is arranged in end face of the coil support portion in face of the head
There is the cavity for accommodating multiturn coil, wherein the movable disk can overcome the return member under the action of coil
The pressure of part and axially slide；
Transmission gear setting on the shaft and with the axis relative rotation, the transmission gear has and the extension
The end-tooth that is meshed of end-tooth, to be made by the engagement of the end-tooth of the end-tooth and extension of transmission gear and separating
It movable disk and the engagement of transmission gear selection and separates；
The limited block is arranged between movable disk and transmission gear and is fixedly connected with the axis, to limit movable disk and transmission
The position of gear；
It is additionally provided with cavity in one end of the extension, and being formed with the limited block for the cavity accommodates the return
The space of element；
It is described control electromagnetic clutch method the following steps are included:
S1, setting electromagnetic clutch input the predetermined threshold of the rotational speed difference between output；
S2 judges the state that electromagnetic clutch is presently in, if electromagnetic clutch is in an off state, carries out step S3, such as
Fruit electromagnetic clutch is in engagement state, carries out step S11,
S3 judges whether to need to engage electromagnetic clutch；If necessary to engage electromagnetic clutch, then step S4 is carried out, if not
It needs to engage electromagnetic clutch, then proceeds to step S10；
S4, judges whether the rotational speed difference between electromagnetic clutch input and output is less than predetermined threshold, if electromagnetic clutch is defeated
Rotational speed difference between entering and exporting is greater than predetermined threshold, then method carries out step S5, if electromagnetic clutch input and output
Between rotational speed difference be less than predetermined threshold, then method carry out step S6；
S5 adjusts the revolving speed of electromagnetic clutch input, so that the rotational speed difference between electromagnetic clutch input and output is less than predetermined
Threshold value (reduces rotational speed difference), after the rotational speed difference is adjusted, returns to step S4；
S6 is passed through electric current i to electromagnetic clutch1, so that movable disk is mobile towards transmission gear under the attraction of the coil of energization；
Then step S7 is carried out；
S7, judges whether the movable disk of electromagnetic clutch engages in place with transmission gear, if electromagnetic clutch engagement is in place,
Method carries out step S9 and carries out step S8 if electromagnetic clutch is not engaged to position,
S8 continues to be passed through electromagnetic clutch electric current i1, it is then return to step S7, so that the electric current being passed through is enough coil generation
The mobile attraction in place of movable disk, until electromagnetic clutch engages in place；
S9 makes the electric current for being passed through electromagnetic clutch remain i2, wherein i1With i2Same phase, and i1>i2；
S10, method terminate；
S11, it is determined whether it needs to disconnect electromagnetic clutch, if you do not need to disconnecting electromagnetic clutch, then carries out step S9, if
It needs to disconnect electromagnetic clutch, then proceeds to step S12；
S12, the torque that will enter into electromagnetic clutch are decreased to predetermined value, wherein and the predetermined value is close to zero, then, into
Row step S13；
S13 cuts off the electric current being passed through in electromagnetic clutch coil, then, carries out step S14；
S14, judges whether the movable disk of electromagnetic clutch and transmission gear disconnect in place, if electromagnetic clutch disconnects in place,
Then then carries out step S10 and carry out step S15 if electromagnetic clutch does not disconnect in place；
S15 is passed through electric current i to coil3Predetermined hold-time, wherein i3With i2Reverse phase, and i3< i2, then, step S14 is repeated,
Then transfer to carry out step S10 in place until electromagnetic clutch disconnects.
2. the method for control electromagnetic clutch according to claim 1, which is characterized in that by being arranged in movable disk
Position sensor come judge the electromagnetic clutch whether engage in place or disconnect in place.
3. the method for control electromagnetic clutch according to claim 1, which is characterized in that when in step S7 electromagnetic clutch
When being not engaged to, the method proceeds to step S8 ', in step S8 ', is passed through electric current i to electromagnetic clutch0, it is then return to
Step S7, so that the electric current being passed through, which generates coil, is enough the mobile attraction in place of movable disk, until electromagnetic clutch engages
Until in place, wherein i0With i1With phase and i0>i1。
4. it is according to claim 1 control electromagnetic clutch method, which is characterized in that in step S1, the electromagnetism from
The predetermined threshold of rotational speed difference between clutch input and output is 50rpm.
5. the method for control electromagnetic clutch according to claim 1, which is characterized in that the electromagnetic clutch is vehicle
Electromagnetic clutch.
6. the method for electromagnetic clutch is controlled described in -5 according to claim 1, which is characterized in that the electromagnetic clutch is electricity
The electromagnetic clutch of electrical automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811612448.3A CN109611463B (en) | 2018-12-27 | 2018-12-27 | Method for controlling electromagnetic clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811612448.3A CN109611463B (en) | 2018-12-27 | 2018-12-27 | Method for controlling electromagnetic clutch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109611463A true CN109611463A (en) | 2019-04-12 |
| CN109611463B CN109611463B (en) | 2020-03-27 |
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ID=66012881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811612448.3A Active CN109611463B (en) | 2018-12-27 | 2018-12-27 | Method for controlling electromagnetic clutch |
Country Status (1)
| Country | Link |
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| CN (1) | CN109611463B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005299736A (en) * | 2004-04-07 | 2005-10-27 | Tochigi Fuji Ind Co Ltd | Torque transmission device |
| CN102213279A (en) * | 2010-03-24 | 2011-10-12 | 贺尔碧格传动技术控股有限公司 | Switchable magnetic coupling and method of operating a switchable magnetic coupling |
| CN104769305A (en) * | 2012-11-08 | 2015-07-08 | 株式会社电装 | Electromagnetic clutch, electromagnetic clutch control device, and electromagnetic clutch control method |
| CN109072991A (en) * | 2016-04-20 | 2018-12-21 | 舍弗勒技术股份两合公司 | Clutch system |
-
2018
- 2018-12-27 CN CN201811612448.3A patent/CN109611463B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005299736A (en) * | 2004-04-07 | 2005-10-27 | Tochigi Fuji Ind Co Ltd | Torque transmission device |
| CN102213279A (en) * | 2010-03-24 | 2011-10-12 | 贺尔碧格传动技术控股有限公司 | Switchable magnetic coupling and method of operating a switchable magnetic coupling |
| CN104769305A (en) * | 2012-11-08 | 2015-07-08 | 株式会社电装 | Electromagnetic clutch, electromagnetic clutch control device, and electromagnetic clutch control method |
| CN109072991A (en) * | 2016-04-20 | 2018-12-21 | 舍弗勒技术股份两合公司 | Clutch system |
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| CN109611463B (en) | 2020-03-27 |
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Effective date of registration: 20200224 Address after: 528000 first floor, Zone A and second floor, plant 2, No.124, Keji 1st Road, Tangjiawan Town, hi tech Zone, Zhuhai City, Guangdong Province Applicant after: ZHUHAI JUNCHI TECHNOLOGY CO., LTD. Address before: 266555 Lingte Power Equipment Co., Ltd., Guanggu Software Park, Emeishan Road, Huangdao District, Qingdao City, Shandong Province Applicant before: Wang Huimin |
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