CN106926048A - A kind of main shaft speed increaser - Google Patents

A kind of main shaft speed increaser Download PDF

Info

Publication number
CN106926048A
CN106926048A CN201710197351.XA CN201710197351A CN106926048A CN 106926048 A CN106926048 A CN 106926048A CN 201710197351 A CN201710197351 A CN 201710197351A CN 106926048 A CN106926048 A CN 106926048A
Authority
CN
China
Prior art keywords
gear
main shaft
speed increaser
oil
input shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710197351.XA
Other languages
Chinese (zh)
Other versions
CN106926048B (en
Inventor
肖曙红
张乐宇
王汉其
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong University of Technology
Original Assignee
Guangdong University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong University of Technology filed Critical Guangdong University of Technology
Priority to CN201710197351.XA priority Critical patent/CN106926048B/en
Publication of CN106926048A publication Critical patent/CN106926048A/en
Application granted granted Critical
Publication of CN106926048B publication Critical patent/CN106926048B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02Driving main working members
    • B23Q5/04Driving main working members rotary shafts, e.g. working-spindles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12Arrangements for cooling or lubricating parts of the machine
    • B23Q11/121Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
    • B23Q11/122Lubricant supply devices

Abstract

The invention discloses a kind of main shaft speed increaser, including casing, input shaft, output shaft and the speed increasing gear group being arranged between input shaft and output shaft, also include jet flow disk, jet flow disk is provided with the flow path extended along the axis of input shaft, one end spout of flow path is used to be connected with pumping installations towards the gear of speed increasing gear group, other end import, oil drain pan is provided with the downside of gear cavity for receiving the lubricating oil flowed down in speed increasing gear group, oil-out is provided with oil drain pan.In the main shaft speed increaser, extreme pressure lubricant is persistently sprayed to gear by pumping installations, make to wrap enough lubricating oil on gear, and extreme pressure lubricant is conducive to washing from original lubricating oil by stamping press, more new oils is attached on gear.When gear teeth meshing, the lubricity between gear is improved, therefore, it is possible to be effectively reduced the problem of gear heating.So the bad problem of the main shaft speed increaser lubricant effect that can efficiently solve main shaft speed increaser.

Description

A kind of main shaft speed increaser
Technical field
The present invention relates to machining technology field, more specifically to a kind of main shaft speed increaser.
Background technology
When being processed using small-sized milling cutter and drill bit, it is necessary to improve suface processing quality using rotating speed very high, together When greatly improve processing efficiency, if lathe turn up in itself will be less than will use main shaft speed increaser when requiring.Speed increaser master It is used to increase lathe rotating speed so that high-speed cutting is usually used in reach good finish, precision and improve processing efficiency The fields such as precision die, microelectronics, medicine equipment, precision instrument, the aviation energy.
Studied for a long period of time discovery by inventor, when being machined, because the high speed of gear rotates, if lubrication is not It is enough, it is easy to produce larger frictional force, this can cause to send amount of heat, then cause the service life of main shaft speed increaser very It is short, easily break down.
In sum, the bad problem of the lubricant effect of main shaft speed increaser how is efficiently solved, is current this area skill Art personnel's urgent problem.
The content of the invention
In view of this, it is an object of the invention to provide a kind of main shaft speed increaser, the main shaft speed increaser can be solved effectively The certainly bad problem of the lubricant effect of main shaft speed increaser.
In order to achieve the above object, the present invention provides following technical scheme:
A kind of main shaft speed increaser, including casing, input shaft, output shaft and be arranged on the input shaft and the output shaft it Between speed increasing gear group, the gear cavity for placing the speed increasing gear group is provided with the casing, also including jet flow disk, institute State jet flow disk and be provided with the flow path extended along the axis of the input shaft, one end spout of the flow path is described in The gear of speed increasing gear group, other end import are used to be connected with pumping installations, be provided with the downside of the gear cavity oil drain pan with For receiving the lubricating oil flowed down in the speed increasing gear group, oil-out is provided with the oil drain pan.
Preferably, also including being connected with the oil-out and for the filter of impurity in filtering lubricant oil, the mistake The outlet for filtering device is connected with the pumping installations.
Preferably, a plurality of flow path is uniformly arranged around the axis of the input shaft, also including for by lubricating oil It is oriented to the Oil Guide mechanism at each described flow path import.
Preferably, the speed increasing gear group includes internal gear and is arranged on the internal gear inner side and is passed with the internal gear Dynamic external gear, the internal gear is relatively fixed with the input shaft, and the output shaft is relatively fixed with the external gear.
Preferably, there is the cooling duct set around the gear cavity in the cabinet exterior, the cooling duct Import is connected for cooling source, and the outlet of the cooling duct is used to be connected with retracting device.
Preferably, the jet flow disk is relatively fixed with the input shaft and is coaxially disposed with the input shaft, the internal tooth Wheel is fixedly mounted on the jet flow disk.
Preferably, the internal gear is coaxially disposed with the external gear, also including being nibbled with the external gear with internal gear The idler gear of conjunction, the idler gear is rotatably connected with the casing, and multiple idler gears are around the external gear It is uniformly arranged.
A kind of main shaft speed increaser that the present invention is provided, the specific main shaft speed increaser include casing, input shaft, output shaft, Speed increasing gear group and jet flow disk, are typically provided with the gear cavity for placing speed increasing gear group in casing.Set on jet flow disk Have a sprayer channel extended along the axis direction of input shaft, and flow path one end spout towards gear, and other end import For being connected with pumping installations, to facilitate pumping installations to the lubricating oil that high pressure is pumped into flow path, lubricating oil is logical from jet flow Road out sprays to the gear of speed increasing gear group afterwards, so that gear is lubricated.And oil drain pan is provided with the downside of gear cavity, with The lubricating oil flowed down in speed increasing gear group is received by oil drain pan, and oil-out is provided with oil drain pan, by unnecessary profit Lubricating oil is derived.
According to above-mentioned technical scheme, it is known that in the application main shaft speed increaser, accessing pumping installations, then start Main shaft speed increaser, the axial speed increasing gear group input low speed torque of input, by the way that after speed increasing gear group speedup, high torque is by defeated Shaft is exported.Now pumping installations is logical from jet flow to extreme pressure lubricant, extreme pressure lubricant is passed through in the flow path on jet flow disk After the spout in road sprays, gear is sprayed to, so as to be covered with lubricating oil on gear, lubricating oil under gravity, is flowed downward to and connect In food tray, and the oil-out derivation for passing through oil drain pan.In the main shaft speed increaser, height is persistently sprayed to gear by pumping installations Pressure lubricating oil, makes to wrap enough lubricating oil on gear, and extreme pressure lubricant is conducive to washing from original profit by stamping press Lubricating oil, makes more new oils be attached on gear.When gear teeth meshing, the lubricity between gear is improved can be effectively Reduce the problem of gear heating.So the main shaft speed increaser lubricant effect that can efficiently solve main shaft speed increaser is bad asking Topic.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the half-sectional structural representation of main shaft speed increaser provided in an embodiment of the present invention.
Marked in accompanying drawing as follows:
Casing 1, input shaft 2, output shaft 3, internal gear 4, external gear 5, idler gear 6, jet flow disk 7, flow path 8, connect Food tray 9, Oil Guide mechanism 10, cooling duct 11.
Specific embodiment
It is bad with the lubricant effect for efficiently solving main shaft speed increaser the embodiment of the invention discloses a kind of main shaft speed increaser Problem.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, Fig. 1 is the half-sectional structural representation of main shaft speed increaser provided in an embodiment of the present invention.
In a kind of specific embodiment, a kind of main shaft speed increaser is present embodiments provided, the main shaft speed increaser is main shaft master Axle speed increaser, specific main shaft speed increaser includes casing 1, input shaft 2, output shaft 3, speed increasing gear group and jet flow disk 7.Low speed Moment of torsion after input shaft 2 is input into, by after speed increasing gear group speedup, then being exported by output shaft 3, wherein speed increasing gear group Engage to realize the change of rotating speed by the different gear of diameter.The output end of output shaft 3 is typically provided with ER sleeves and ER spiral shells Mother, for fixed handle of a knife.
The gear cavity for placing speed increasing gear group is typically provided with casing 1, how speed increasing gear group is specifically set, May be referred to prior art.Input shaft 2 is rotatably connected with casing 1, so that moment of torsion can be input into, similarly, output shaft 3 and case Body 1 is rotatably connected, with can be by torque output.The rotation of input shaft 2 and output shaft 3 for convenience, typically can be in input shaft 2 Bearing is provided between casing 1, and between output shaft 3 and casing 1, and is typically provided with angular contact ball bearing.
Be provided with jet flow disk 7 along input shaft 2 axis direction extend sprayer channel, and flow path 8 one end Spout is towards gear, and other end import is used to be connected with pumping installations, to facilitate pumping installations to pumping into height in flow path 8 The lubricating oil of pressure, lubricating oil out sprays to the gear of speed increasing gear group from flow path 8 afterwards, so that gear is lubricated.
And the lower end of gear cavity is provided with oil drain pan 9, receive the lubrication flowed down in speed increasing gear group with by oil drain pan 9 Oil, and oil-out is provided with oil drain pan 9, unnecessary lubricating oil is derived.Unnecessary lubricating oil can be circulated profit With that is, into pumping installations, then being exported to flow path 8 by pumping installations;Can also abandon, to ensure main shaft speed increaser It is interior to use new lubricating oil.
In the application main shaft speed increaser, pumping installations is accessed, then start main shaft speed increaser, input shaft 2 is to speedup tooth Wheel group is input into low speed torque, by the way that after speed increasing gear group speedup, high torque is exported by output shaft 3.Now pumping installations to Extreme pressure lubricant is passed through in flow path 8 on jet flow disk 7, after extreme pressure lubricant sprays from the spout of flow path 8, tooth is sprayed to Wheel, so as to be covered with lubricating oil on gear, lubricating oil under gravity, is flowed downward in oil drain pan 9, and by oil drain pan 9 Oil-out derive.In the main shaft speed increaser, extreme pressure lubricant is persistently sprayed to gear by pumping installations, make to be wrapped up on gear Enough lubricating oil is covered with, and extreme pressure lubricant is conducive to washing from original lubricating oil by stamping press, makes more new lubrications Oil is attached on gear.When gear teeth meshing, the lubricity between gear improves the problem that can be effectively reduced gear heating. So the bad problem of the main shaft speed increaser lubricant effect that can efficiently solve main shaft speed increaser.
Further, filter is additionally provided with, filter is connected with the oil-out of oil drain pan 9, and for filtering out Impurity in lubricating oil, so that lubricating oil can be used again, and improves lubricant effect.The now outlet of filter and pumping Device is connected, so that lubricating oil forms interior circulation, to ensure lubricating oil service efficiency.And can be removed in time by filter Impurity in lubricating oil, it is ensured that the lubricant effect of gear.
Further, it is contemplated that high-speed gear rotates, the lubricating oil that throws away attachment can be centrifuged and causes what is adhered on gear Lubricating oil greatly reduces, relatively more in order to ensure the lubricating oil quantity that gear adheres to everywhere, can be provided with a plurality of flow path 8, and this plurality of flow path 8 is uniformly arranged around the axis of input shaft 2.To ensure jet face and coverage rate.Now for convenience Lubricating oil is imported, the Oil Guide mechanism 10 for being oriented to lubricating oil at each import of flow path 8 can be provided with.Specifically lead Oil machine structure 10 can be pouring oil lubrication mechanism.
Further, speed increasing gear group can be made to include internal gear 4 and be arranged on the inner side of internal gear 4 and passed with internal gear 4 Dynamic external gear 5, internal gear 4 is relatively fixed with the input shaft 2, and output shaft 3 is relatively fixed with external gear 5.Need explanation It is that internal gear 4 refers to gear of the gear teeth towards axis, and external gear 5 refers to gear of the gear teeth towards outside.For increasing Small diameter gear is now arranged on the inner side of gear wheel in large diameter all than larger for the gear train of fast ratio, the diameter of general gear wheel, Be conducive to reducing overall volume.
Further, integral arrangement for convenience, and in view of the space inside gear wheel in large diameter than larger.Based on this, Preferred internal gear 4 is coaxially disposed with external gear 5 herein, and is provided with the idler gear 6 engaged with external gear 5 with internal gear 4, Idler gear 6 is rotatably connected with casing 1.By idler gear 6, the power of internal gear 4 is transferred at external gear 5, shape Into two-stage transmission, be conducive to improving the stability being driven.Further, more stablize to ensure transmission, it is preferred multiple herein Idler gear 6 is uniformly arranged around external gear 5.
Further, jet flow disk 7 is set for convenience, jet flow disk 7 can be made to be relatively fixed with input shaft 2, and with input Axle 2 is coaxially disposed, so that input shaft 2 drives jet flow disk 7 to rotate, so as to after lubricating oil is thrown away by centrifugal force, make lubricating oil shape Into spraying area, to increase the contact with gear, then ensure jet flow effect, make that there is more preferable lubricant effect between gear.Together When internal gear 4 is installed for convenience, now can by internal gear 4 be arranged on jet flow disk 7 on.
Further, it is contemplated that after lubrication, gear still has certain heating, based on this, herein outside preferred casing 1 There is the cooling duct 11 set around gear cavity, the import of the cooling duct 11 is used to be connected with cooling source, and cools down in wall The outlet of passage 11 is used to be connected with retracting device, and gear cavity internal gear is cooled down with by cooling duct 11.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention. Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one The scope most wide for causing.

Claims (7)

1. a kind of main shaft speed increaser, including casing, input shaft, output shaft and it is arranged between the input shaft and the output shaft Speed increasing gear group, the gear cavity for placing the speed increasing gear group is provided with the casing, it is characterised in that also include Jet flow disk, the jet flow disk is provided with the flow path extended along the axis of the input shaft, one end spray of the flow path Mouthful it is used to connect with pumping installations towards the gear of the speed increasing gear group, other end import, the downside setting of the gear cavity There is oil drain pan for receiving the lubricating oil flowed down in the speed increasing gear group, oil-out is provided with the oil drain pan.
2. main shaft speed increaser according to claim 1, it is characterised in that also including connecting and being used for the oil-out The filter of impurity in filter lubricating oil, the outlet of the filter is connected with the pumping installations.
3. main shaft speed increaser according to claim 2, it is characterised in that a plurality of flow path is around the input shaft Axis is uniformly arranged, also including the Oil Guide mechanism for being oriented to lubricating oil at each described flow path import.
4. the main shaft speed increaser according to claim any one of 1-3, it is characterised in that the speed increasing gear group includes internal tooth Take turns and be arranged on internal gear inner side and with the external gear of the internal gear transmission, the internal gear is relative with the input shaft Fixed, the output shaft is relatively fixed with the external gear.
5. main shaft speed increaser according to claim 4, it is characterised in that have around the gear in the cabinet exterior The cooling duct that chamber is set, the import of the cooling duct is used to connect with cooling source, the outlet of the cooling duct for Retracting device is connected.
6. main shaft speed increaser according to claim 5, it is characterised in that the jet flow disk is relatively fixed with the input shaft And be coaxially disposed with the input shaft, the internal gear is fixedly mounted on the jet flow disk.
7. main shaft speed increaser according to claim 6, it is characterised in that the internal gear coaxially sets with the external gear Put, also including the idler gear engaged with the external gear with internal gear, the idler gear rotatably connects with the casing Connect, multiple idler gears are uniformly arranged around the external gear.
CN201710197351.XA 2017-03-29 2017-03-29 Main shaft speed increaser Expired - Fee Related CN106926048B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710197351.XA CN106926048B (en) 2017-03-29 2017-03-29 Main shaft speed increaser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710197351.XA CN106926048B (en) 2017-03-29 2017-03-29 Main shaft speed increaser

Publications (2)

Publication Number Publication Date
CN106926048A true CN106926048A (en) 2017-07-07
CN106926048B CN106926048B (en) 2020-04-28

Family

ID=59425486

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710197351.XA Expired - Fee Related CN106926048B (en) 2017-03-29 2017-03-29 Main shaft speed increaser

Country Status (1)

Country Link
CN (1) CN106926048B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010060038A (en) * 2008-09-03 2010-03-18 Mitsubishi Heavy Ind Ltd Speed-increasing gear lubrication device and method
CN202392088U (en) * 2011-12-28 2012-08-22 河南太行全利重工股份有限公司 Novel dynamic sealing device for gearbox
CN202717026U (en) * 2012-08-27 2013-02-06 苏州船用动力系统股份有限公司 Structure of oil thrower used to convey lubricating oil to steering oar
CN202732910U (en) * 2012-08-20 2013-02-13 东风汽车股份有限公司 Mechanical gearbox bearing lubricating system
CN203730728U (en) * 2014-03-14 2014-07-23 长沙瑞峰传动机械有限责任公司 Speed reducing machine lubricating device
CN104074926A (en) * 2014-07-01 2014-10-01 北京航空航天大学 Main speed reducer of fan of novel GTF aircraft engine
CN204664372U (en) * 2015-05-18 2015-09-23 董建雄 Loaded vehicle main reducer of middle axle gear forced lubrication device
CN205383225U (en) * 2016-01-12 2016-07-13 东莞市万福五金制品有限公司 Novel on -vehicle electricity generation speed increaser
CN205479154U (en) * 2016-03-01 2016-08-17 彭世昌 Planet gear of electricelectric motor car

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010060038A (en) * 2008-09-03 2010-03-18 Mitsubishi Heavy Ind Ltd Speed-increasing gear lubrication device and method
CN202392088U (en) * 2011-12-28 2012-08-22 河南太行全利重工股份有限公司 Novel dynamic sealing device for gearbox
CN202732910U (en) * 2012-08-20 2013-02-13 东风汽车股份有限公司 Mechanical gearbox bearing lubricating system
CN202717026U (en) * 2012-08-27 2013-02-06 苏州船用动力系统股份有限公司 Structure of oil thrower used to convey lubricating oil to steering oar
CN203730728U (en) * 2014-03-14 2014-07-23 长沙瑞峰传动机械有限责任公司 Speed reducing machine lubricating device
CN104074926A (en) * 2014-07-01 2014-10-01 北京航空航天大学 Main speed reducer of fan of novel GTF aircraft engine
CN204664372U (en) * 2015-05-18 2015-09-23 董建雄 Loaded vehicle main reducer of middle axle gear forced lubrication device
CN205383225U (en) * 2016-01-12 2016-07-13 东莞市万福五金制品有限公司 Novel on -vehicle electricity generation speed increaser
CN205479154U (en) * 2016-03-01 2016-08-17 彭世昌 Planet gear of electricelectric motor car

Also Published As

Publication number Publication date
CN106926048B (en) 2020-04-28

Similar Documents

Publication Publication Date Title
CN105209282B (en) Axle assembly
CN205479154U (en) Planet gear of electricelectric motor car
CN105276153A (en) Integrated speed reduction drive system with oil jet lubrication and circulating cooling structure
CN202992136U (en) Transmission lubricating system oil guide device
CN208764249U (en) Worm shaft with high rotational efficienty
CN103398165B (en) A kind of self-circulation lubricating method and device of vertical speed reducer
CN106926048A (en) A kind of main shaft speed increaser
CN206429640U (en) Mixed dynamic speed changing box lubricating system
CN106122459B (en) A kind of sewage disposal turbine gear-box
CN209430737U (en) A kind of new energy pure electric vehicle reduction gearbox lubricating system
CN218625262U (en) Avoid wind-powered electricity generation gear box of flank of tooth wearing and tearing
CN202646648U (en) Transfer case and engineering machinery
CN218564351U (en) Take lubricated mechanism's speed reducer gear box subassembly
CN205101473U (en) Planetary high -speed gear change case
CN207830537U (en) One kind detracting high efficiency transmission device for planetary noise reduction
CN205190698U (en) Take reduction gear of oil spray lubrication structure
CN212455454U (en) Electric drive axle and vehicle
CN205190707U (en) Take reduction gear of shock attenuation, glossy cunning of collection and circulative cooling function
CN205734161U (en) A kind of miniature bull of high rotating speed radially dynamic tool apron
CN105840790A (en) Speed reducer special for efficient granulator
CN210153156U (en) Planetary gear box for fracturing pump
CN207034127U (en) A kind of differential mechanism axle shaft gear
CN207782587U (en) A kind of electromechanical integration deceleration device
CN206845797U (en) Double-shaft output speed reducer
CN105240501A (en) Speed reduction driving device with oil injection and lubrication structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Xiao Shuhong

Inventor after: Wang Hanqi

Inventor after: Zhang Leyu

Inventor before: Xiao Shuhong

Inventor before: Zhang Leyu

Inventor before: Wang Hanqi

GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200428

Termination date: 20210329