[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN108739227A - A kind of progressive excavating tool - Google Patents

A kind of progressive excavating tool Download PDF

Info

Publication number
CN108739227A
CN108739227A CN201810653891.9A CN201810653891A CN108739227A CN 108739227 A CN108739227 A CN 108739227A CN 201810653891 A CN201810653891 A CN 201810653891A CN 108739227 A CN108739227 A CN 108739227A
Authority
CN
China
Prior art keywords
perching knife
hydraulic
cylinder
linked cylinder
multigroup
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
CN201810653891.9A
Other languages
Chinese (zh)
Other versions
CN108739227B (en
Inventor
翟恩星
左双双
翟赵昱阳
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.)
Nanjing Forestry University
Original Assignee
Nanjing Forestry University
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 Nanjing Forestry University filed Critical Nanjing Forestry University
Priority to CN201810653891.9A priority Critical patent/CN108739227B/en
Publication of CN108739227A publication Critical patent/CN108739227A/en
Application granted granted Critical
Publication of CN108739227B publication Critical patent/CN108739227B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G23/00Forestry
    • A01G23/02Transplanting, uprooting, felling or delimbing trees
    • A01G23/06Uprooting or pulling up trees; Extracting or eliminating stumps
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/22Improving land use; Improving water use or availability; Controlling erosion

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Shovels (AREA)

Abstract

A kind of progressive excavating tool, including multigroup hydraulic linked cylinder and multigroup cutter, the tangent line of multigroup cutter outermost surface is perpendicular to ground, medial surface is cambered surface, multigroup cutter most inner side face mutually abuts when sliding onto lower end, cutter described in every group is made of multi-disc perching knife, and multigroup hydraulic linked cylinder is connected to the upper end for being detachably connected on perching knife described in multi-disc respectively;The cutter transverse direction extending range of the present invention is small, and required working space is small, suitable for forest zone, gardens operation, is suitable for the transplanting of the nursery flowers and trees of high-density planting;Mutually being abutted when multigroup cutter most inner side face slides onto lower end can completely excavate the plant such as trees, ensure that the integrality of plant root soil ball, improve the quality of plant root soil ball, improve the survival rate of flowers and trees.

Description

A kind of progressive excavating tool
Technical field
The present invention relates to agricultural equipment fields, and in particular to a kind of progressive excavating tool of tree transplanter.
Background technology
Currently, with the increase of afforestation area, trees will frequently be transplanted, due to China's land resource scarcity, greatly Part nursery, the seedling growth in gardens are close, and strain spacing is small.The excavation of traditional artificial one spade of a spade, transplanting method, not only shadow Soil ball quality is rung, causes plant percent low, and excavated by manual work tree working condition is arduous, not only efficiency was low, but also time-consuming.It is existing Scraper knife type tree transplanter is higher suitable for the age of tree, the larger trees of strain diameter, and the transplanting tree of suitable single plant, dispersion, shovel Knife extending transversely range is long, and required working space is larger, is not suitable for forest zone, gardens operation.
Thus it need need to develop a kind of progressive excavating tool at present, to overcome tree transplanter operating radius Greatly, in forest zone, the intensive inoperable problem in place of the trees such as gardens.
Invention content
In view of this, the present invention provides a kind of progressive excavating tools.
To achieve the goals above, the present invention adopts the following technical scheme that:
A kind of progressive excavating tool, including multigroup hydraulic linked cylinder and multigroup cutter, multigroup cutter outermost For the tangent line in face perpendicular to ground, medial surface is cambered surface, and multigroup cutter most inner side face mutually abuts when sliding onto lower end, described Cutter is made of multi-disc perching knife, and multigroup hydraulic linked cylinder is connected to is detachably connected on the upper of perching knife described in multi-disc respectively End.
The cutter transverse direction extending range of the present invention is small, and required working space is small, suitable for forest zone, gardens operation, is suitable for height The transplanting of the nursery flowers and trees of density plantation;Multigroup cutter most inner side face mutually abuts when sliding onto lower end can be by plant such as trees It completely excavates, ensure that the integrality of plant root soil ball, improve the quality of plant root soil ball, improve flowers and trees Survival rate.
Preferably, every group of cutter is made of three pieces perching knife, is followed successively by perching knife one, perching knife two and perching knife three from outside to inside; Multigroup hydraulic linked cylinder is three groups, respectively hydraulic linked cylinder one, hydraulic linked cylinder two and hydraulic linked cylinder three;It is described Hydraulic linked cylinder one is connect with perching knife one using bulb, and for the tangent line of one lateral surface of the perching knife perpendicular to ground, medial surface is arc Face, medial surface middle part are provided with dovetail groove, and the hydraulic linked cylinder two is connect with two upper end of perching knife using bulb, in the perching knife two Side, lateral surface are cambered surface, and lateral surface is provided with fixture block one compatible with the dovetail groove, the fixture block one and the swallow Stern notch is slidably connected;Two medial surface of perching knife is provided with dovetail groove;Hydraulic linked cylinder three is same as three upper end of the perching knife to use bulb Connection, three medial surface of the perching knife, lateral surface are cambered surface, and lateral surface is provided with fixture block two compatible with the dovetail groove, The fixture block two is slidably connected with the dovetail groove.
Further, hydraulic linked cylinder described in every group is set there are two hydraulic cylinder, and described two hydraulic cylinder synchronous move.
Further, the bulb is fixed on the perching knife top side by side for two, and the bulb is equipped with through-hole, described The connector of hydraulic cylinder is identical as the bulb through-hole aperture size, and pin passes through the bulb through-hole and the hydraulic cylinder Connector makes the bulb be detachably connected with the hydraulic cylinder.
Further, the hydraulic linked cylinder one, hydraulic linked cylinder two and three stagger arrangement of hydraulic linked cylinder installation;It is described Hydrodynamic cylinder pressure one, hydraulic linked cylinder two and hydraulic linked cylinder three are connect with power source, the hydraulic linked cylinder one, linkage liquid Solenoid valve control is installed between cylinder pressure two and hydraulic linked cylinder three and power source.
Further, the lateral surface arcwall face of the perching knife two mutually agrees with one inside arcwall face of perching knife.
Further, the lateral surface arcwall face of the perching knife three mutually agrees with two inside arcwall face of perching knife.
The present invention uses above-mentioned technical proposal, keeps the spacing between perching knife minimum, and the sundries such as soil will not invade wherein, generate Obstruction, influences equipment normal operation.
Further, the perching knife one, perching knife two and perching knife three are wedge shape wide at the top and narrow at the bottom.
Further, the two sides of the perching knife one, perching knife two and perching knife three with put the first edge on a knife or a pair of scissors below.
The present invention uses above-mentioned technical proposal, and the form that top heavy is presented in perching knife is enable to ensure that perching knife is preferably inserted into In soil, ensure the rigidity and stability of device.
The present invention has the following advantages:
1, structure of the invention is compact, simple in structure, and device diameters are small, and operating radius is small, easy to use;
2, the present invention is close suitable for nursery, the seedling growth in gardens, and the transplanting of the closely spaced flowers and trees of strain, plant has been excavated Whole property is good, is easy to survive.
3, structure of the invention is stablized, and there are two hydraulic cylinders for each perching knife tool, and strength is big, is suitble to the excavation flower of various environment Wood has very high market popularization value.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is schematic structural view of the invention;
Fig. 2 is one structural schematic diagram of perching knife of the present invention;
Fig. 3 is two structural schematic diagram of perching knife of the present invention;
Fig. 4 is three structural schematic diagram of perching knife of the present invention;
In figure:1 is perching knife one;2 be perching knife two;3 be perching knife three;4 be hydraulic linked cylinder;41 be hydraulic linked cylinder one;42 For hydraulic linked cylinder two;43 be hydraulic linked cylinder three.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
A kind of progressive excavating tool includes multigroup hydraulic linked cylinder 4 (being not marked in figure) and multigroup cutter, multigroup knife Has the tangent line of lateral surface perpendicular to ground, medial surface is cambered surface, and multigroup cutter most inner side face mutually abuts when sliding onto lower end, often Group cutter is made of multi-disc perching knife, and multigroup hydraulic linked cylinder is connected to is detachably connected on the upper of perching knife described in multi-disc respectively End.
In the presence of solving the problems, such as background technology, digging mechanism is made of four groups of cutters, and each group of cutter is by three Piece perching knife is superimposed, and every cutter is pushed by hydraulic linked cylinder, realizes progressive excavation.
Specifically, as shown in Figs 1-4, every group of cutter is followed successively by perching knife 1, perching knife 22 and perching knife 33 from outside to inside; Hydraulic linked cylinder is three groups, respectively hydraulic linked cylinder 1, hydraulic linked cylinder 2 41 and hydraulic linked cylinder 3 43;
As shown in Figure 2:Hydraulic linked cylinder 1 and perching knife 1 are connect using bulb, there are two hydraulic linked cylinder 1 is set Hydraulic cylinder, two hydraulic cylinder synchronous movements;Bulb is two and is fixed on one 1 top of perching knife side by side, and bulb is equipped with through-hole, hydraulic pressure The connector of cylinder is identical as bulb through-hole aperture size, and pin passes through the connector of bulb through-hole and hydraulic cylinder to make bulb and liquid Cylinder pressure is detachably connected;For the tangent line of one 1 lateral surface of perching knife perpendicular to ground, medial surface is cambered surface, and dovetail is provided in the middle part of medial surface Slot 11;
As shown in Figure 3:Hydraulic linked cylinder 2 42 is connect with 22 upper end of perching knife using bulb, and hydraulic linked cylinder 2 42 is equipped with Two hydraulic cylinders, two hydraulic cylinder synchronous movements;Bulb is two and is fixed on 22 top of perching knife side by side, and bulb is equipped with through-hole, The connector of hydraulic cylinder is identical as bulb through-hole aperture size, and pin passes through the connector of bulb through-hole and hydraulic cylinder to make bulb It is detachably connected with hydraulic cylinder;22 medial surface of perching knife, lateral surface are cambered surface, and lateral surface is provided with the medial surface with perching knife 1 11 compatible fixture block 1 of dovetail groove, fixture block 1 is slidably connected with dovetail groove 11, to realize perching knife 22 along perching knife One 1 arc shaped inside face slides up and down, and by swallow-tail form fixture block 1 mounted on the outside of perching knife 2 and is opened in perching knife 1 The dovetail groove of inside realizes that perching knife 2 is fed along 1 medial surface arching trajectory of perching knife, and the dovetail groove height for being opened in 1 inside of perching knife is protected Demonstrate,prove the work feed depth of perching knife 2;22 medial surface of perching knife is provided with dovetail groove 22;
As shown in Figure 4:Hydraulic linked cylinder 3 43 is same as 33 upper end of perching knife to be connected using bulb, hydraulic linked cylinder 3 43 If there are two hydraulic cylinder, two hydraulic cylinder synchronous movements;Bulb is two and is fixed on 33 top of perching knife side by side, and bulb is equipped with The connector of through-hole, hydraulic cylinder is identical as bulb through-hole aperture size, and pin passes through the connector of bulb through-hole and hydraulic cylinder Bulb is set to be detachably connected with hydraulic cylinder;Realize that hydraulic linked cylinder 3 43 drives perching knife 33 to move;33 medial surface of perching knife, outside Face is cambered surface, and lateral surface is provided with fixture block 2 31 compatible with the dovetail groove 22, and fixture block 2 31 is slided with dovetail groove 22 Connection, to realize that perching knife 33 is slided up and down along the arc shaped inside face of perching knife 22, by mounted on 3 outside of perching knife Trapezoidal fixture block 2 31 and the dovetail groove being opened on the inside of perching knife 2 realize that perching knife 3 is fed along 2 medial surface arching trajectory of perching knife, open The dovetail groove height for being located at 2 inside of perching knife ensures the work feed depth of perching knife 3.
Four groups of perching knives three mutually abut when sliding onto lower end, a bowl shaped space are formed, for holding the needs excavated The flowers and trees transplanted.
More specifically, hydraulic linked cylinder 1, hydraulic linked cylinder 2 42 and 3 43 stagger arrangement of hydraulic linked cylinder installation;Linkage Hydraulic cylinder 1, hydraulic linked cylinder 2 42 and hydraulic linked cylinder 3 43 are connect with power source, hydraulic linked cylinder 1, linkage Solenoid valve control is installed between hydraulic cylinder 2 42 and hydraulic linked cylinder 3 43 and power source.
In the particular embodiment, the lateral surface arcwall face of perching knife 22 mutually agrees with one 1 inside arcwall face of perching knife.
In the particular embodiment, the lateral surface arcwall face of perching knife 33 mutually agrees with 22 inside arcwall face of perching knife.
The present invention uses above-mentioned technical proposal, keeps the spacing between perching knife minimum, and the sundries such as soil will not invade wherein, generate Obstruction, influences equipment normal operation.
In the particular embodiment, perching knife one, perching knife two and perching knife three are wedge structure wide at the top and narrow at the bottom.
In the particular embodiment, the two sides of perching knife one, perching knife two and perching knife three with put the first edge on a knife or a pair of scissors below.
Dovetail groove 11 and dovetail groove 22 can be with cuboid type grooves in other specific embodiments
The present invention uses above-mentioned technical proposal, and the form that top heavy is presented in perching knife is enable to ensure that perching knife is preferably inserted into In soil, ensure the rigidity and stability of device.
Structure of the invention is compact, simple in structure, and device diameters are small, and operating radius is small, easy to use;The present invention is suitable for seedling Garden, the seedling growth in gardens are close, the transplanting of the closely spaced flowers and trees of strain, and plant excavation integrality is good, is easy to survive.Knot of the present invention Structure is stablized, and there are two hydraulic cylinders for each perching knife tool, and strength is big, is suitble to the excavation flowers and trees of various environment, and there is very high market to push away Wide value.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to 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, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest range caused.

Claims (9)

1. a kind of progressive excavating tool, which is characterized in that including multigroup hydraulic linked cylinder and multigroup cutter, multigroup knife Has the tangent line of outermost surface perpendicular to ground, medial surface is cambered surface, and multigroup cutter most inner side face slides onto mutual when lower end It abuts, cutter described in every group is made of multi-disc perching knife, and multigroup hydraulic linked cylinder is connected to is detachably connected on multi-disc respectively The upper end of the perching knife.
2. a kind of progressive excavating tool according to claim 1, which is characterized in that cutter is by three pieces perching knife described in every group Composition, is followed successively by perching knife one (1), perching knife two (2) and perching knife three (3) from outside to inside;Multigroup hydraulic linked cylinder is three groups, Respectively hydraulic linked cylinder one (41), hydraulic linked cylinder two (41) and hydraulic linked cylinder three (43);The hydraulic linked cylinder one (41) it being connect using bulb with perching knife one (1), for the tangent line of the perching knife one (1) lateral surface perpendicular to ground, medial surface is cambered surface, It is provided with dovetail groove 11 in the middle part of medial surface, the hydraulic linked cylinder two (42) is connect with perching knife two (2) upper end using bulb, the shovel Knife two (2) medial surface, lateral surface are cambered surface, and lateral surface is provided with fixture block 1 compatible with the dovetail groove 11, described Fixture block 1 is slidably connected with the dovetail groove 11;Perching knife two (2) medial surface is provided with dovetail groove 22;Hydraulic linked cylinder three (43) with The perching knife three (3) upper end equally uses bulb to connect, and the perching knife three (3) medial surface, lateral surface are cambered surface, and lateral surface is set It is equipped with fixture block 2 31 compatible with the dovetail groove 22, the fixture block 2 31 is slidably connected with the dovetail groove 22.
3. a kind of progressive excavating tool according to claim 2, which is characterized in that hydraulic linked cylinder is equipped with described in every group Two hydraulic cylinders, described two hydraulic cylinder synchronous movements.
4. a kind of progressive excavating tool according to claim 3, which is characterized in that the bulb is two to be fixed side by side On the perching knife top, the bulb is equipped with through-hole, the connector of the hydraulic cylinder and the bulb through-hole aperture size phase Together, pin passes through the connector of the bulb through-hole and the hydraulic cylinder that the bulb is made detachably to connect with the hydraulic cylinder It connects.
5. a kind of progressive excavating tool according to claim 2, which is characterized in that the hydraulic linked cylinder one, linkage Hydraulic cylinder two and three stagger arrangement of hydraulic linked cylinder installation;The hydraulic linked cylinder one, hydraulic linked cylinder two and hydraulic linked cylinder Three connect with power source, pacify between the hydraulic linked cylinder one, hydraulic linked cylinder two and hydraulic linked cylinder three and power source Fill solenoid valve control.
6. a kind of progressive excavating tool according to claim 2, which is characterized in that the lateral surface of the perching knife two (2) Arcwall face mutually agrees with arcwall face on the inside of perching knife one (1).
7. a kind of progressive excavating tool according to claim 2, which is characterized in that the lateral surface of the perching knife three (3) Arcwall face mutually agrees with arcwall face on the inside of perching knife two (2).
8. according to a kind of progressive excavating tool of claim 2-7 any one of them, which is characterized in that the perching knife one (1), Perching knife two (2) and perching knife three (3) are wedge structure wide at the top and narrow at the bottom.
9. according to a kind of progressive excavating tool of claim 2-7 any one of them, which is characterized in that the perching knife one (1), The two sides of perching knife two (2) and perching knife three (2) with put the first edge on a knife or a pair of scissors below.
CN201810653891.9A 2018-06-22 2018-06-22 Progressive excavating tool Active CN108739227B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810653891.9A CN108739227B (en) 2018-06-22 2018-06-22 Progressive excavating tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810653891.9A CN108739227B (en) 2018-06-22 2018-06-22 Progressive excavating tool

Publications (2)

Publication Number Publication Date
CN108739227A true CN108739227A (en) 2018-11-06
CN108739227B CN108739227B (en) 2023-06-09

Family

ID=63976792

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810653891.9A Active CN108739227B (en) 2018-06-22 2018-06-22 Progressive excavating tool

Country Status (1)

Country Link
CN (1) CN108739227B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001197839A (en) * 2000-01-17 2001-07-24 Hirasawa Komuten:Kk Apparatus for transplanting trees
US6338512B1 (en) * 2000-01-31 2002-01-15 Jonathan Paul Ruppert Clamp action shovel for single hand operation
CN205056498U (en) * 2015-10-13 2016-03-02 王松彪 Spiller combination
CN106258016A (en) * 2016-08-15 2017-01-04 陆开珍 A kind of agricultural spade
CN208354217U (en) * 2018-06-22 2019-01-11 南京林业大学 A kind of progressive excavating tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001197839A (en) * 2000-01-17 2001-07-24 Hirasawa Komuten:Kk Apparatus for transplanting trees
US6338512B1 (en) * 2000-01-31 2002-01-15 Jonathan Paul Ruppert Clamp action shovel for single hand operation
CN205056498U (en) * 2015-10-13 2016-03-02 王松彪 Spiller combination
CN106258016A (en) * 2016-08-15 2017-01-04 陆开珍 A kind of agricultural spade
CN208354217U (en) * 2018-06-22 2019-01-11 南京林业大学 A kind of progressive excavating tool

Also Published As

Publication number Publication date
CN108739227B (en) 2023-06-09

Similar Documents

Publication Publication Date Title
WO2015152476A1 (en) Portable power rotary device provided with drill having earthwork and cut-off functions
CN116649023B (en) Intelligence forestry cultivation is with soil excavating equipment
CN110366883A (en) The combine plowing machine of nonirrigated farmland stalk plough rotation returning to the field
CN208354217U (en) A kind of progressive excavating tool
KR101234700B1 (en) Potable power rotary device
CN102972126A (en) Puncher dedicated for planting trees in deep-hole caves
CN103053380A (en) Method for improving transplanting survival rate and grow effect of large and medium diameter trees
CN108739227A (en) A kind of progressive excavating tool
CN205455020U (en) Small -size portable seedling ware
CN110915377A (en) Novel double-row corn sowing and fertilizing furrow opener and corn planter
CN219628284U (en) Oil tea combined operation machine
CN109804739A (en) A kind of paddy field rotary tillage buries stubble and plays slurry land leveller
CN204634386U (en) Radish reaping machine
CN205196306U (en) Automatic injection planter is selected to many topography
CN210328509U (en) Multipurpose seedling transplanting device
CN209731977U (en) furrow opener for alfalfa seeding machine
CN210143279U (en) Seedling planting device for planting sweet potatoes
CN212065164U (en) Digging shovel for nursery stock transplantation
CN202206744U (en) Special puncher for planting trees in deep-hole caves
CN203504993U (en) Split-type sand suction hole former
CN207692375U (en) A kind of potato furrowing type harvest shovel
CN215269835U (en) Gardens are with plant shovel of pulling seedlings convenient to adjust
CN216163994U (en) Novel forestry engineering is special device
CN104871690A (en) Ditcher used for lycium chinense planting
CN217608273U (en) Ecological safety cave digging, cleaning and cave burying device for hillside

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: Zhai Enyu

Inventor after: Zuo Shuangshuang

Inventor after: Zhai Zhaoyuyang

Inventor before: Zhai Enxing

Inventor before: Zuo Shuangshuang

Inventor before: Zhai Zhaoyuyang

GR01 Patent grant
GR01 Patent grant