CN104259949B - A kind of building roof sanding apparatus of variable-ratio - Google Patents

A kind of building roof sanding apparatus of variable-ratio Download PDF

Info

Publication number
CN104259949B
CN104259949B CN201410516149.5A CN201410516149A CN104259949B CN 104259949 B CN104259949 B CN 104259949B CN 201410516149 A CN201410516149 A CN 201410516149A CN 104259949 B CN104259949 B CN 104259949B
Authority
CN
China
Prior art keywords
polishing
roof
outer cover
pressing board
drive motors
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.)
Active
Application number
CN201410516149.5A
Other languages
Chinese (zh)
Other versions
CN104259949A (en
Inventor
余炳强
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.)
Beijing urban construction Yuandong Construction Investment Group Co Ltd
Original Assignee
余炳强
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 余炳强 filed Critical 余炳强
Priority to CN201410516149.5A priority Critical patent/CN104259949B/en
Publication of CN104259949A publication Critical patent/CN104259949A/en
Application granted granted Critical
Publication of CN104259949B publication Critical patent/CN104259949B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10Single-purpose machines or devices
    • B24B7/18Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/182Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04Protective covers for the grinding wheel
    • B24B55/05Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06Dust extraction equipment on grinding or polishing machines
    • B24B55/10Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10Single-purpose machines or devices
    • B24B7/18Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools

Abstract

A kind of building roof sanding apparatus of variable-ratio, for the roof (1) of building of polishing, comprise sanding component (2), drive motors (3) and bracket component (6), wherein, sanding component (2) is for performing polishing processing, drive motors operates for driving sanding component (2), and bracket component (6) is for carrying sanding component (2), gearbox (7) and drive motors (3).

Description

A kind of building roof sanding apparatus of variable-ratio
Technical field
The present invention relates to building machinery field, more particularly, relate to the leveling of the lower surface of the floor roof of building, especially a kind of building roof sanding apparatus of variable-ratio.
Background technology
At building field, the floor of building is often through building or floor formation.This floor forms the roof of building, to form ceiling.But, the surface often coarse injustice of this roof.For follow-up construction processes, such as coating or scrape mud, all has adverse effect.Therefore, need to flatten the surface of this roof.
Polishing leveling can process rough surface, well to reach the requirement of follow-up construction.But grinding machine easily produces a large amount of dust when polishing, and this health for construction environment, workman and construction processes equipment all have adverse effect.And some protectors are also difficult to accomplish that excellent sealing is collected.
Summary of the invention
The object of the present invention is to provide a kind of polishing building machinery, it can carry out polishing leveling to hackly building ceiling roof, and it can effectively avoid disseminating of dust.
According to aspects of the present invention, a kind of building roof sanding apparatus of variable-ratio, for the roof of building of polishing, comprise sanding component, drive motors and bracket component, wherein, sanding component is for performing polishing processing, and drive motors operates for driving sanding component, bracket component is for carrying sanding component, gearbox and drive motors
Wherein, sanding component comprises outer cover, described outer cover comprises the sidewall and diapire that are integrally formed, sidewall and diapire surround and form outer cover inner chamber, outer cover inner chamber is for holding rotary-grinding head, and the open upper end of outer cover inner chamber, for stretching out to contact described roof for rotary-grinding head, rotary-grinding head is fixedly connected with by the upper end of linking arm with polishing rotating driveshaft, described rotary-grinding head, the upper end of linking arm and polishing rotating driveshaft is all contained in described outer cover inner chamber, when polishing, described outer cover inner chamber can stop disseminating and can collecting polishing powder dirt of polishing dust,
The top of described sidewall is the neighboring in semicircular in shape cross section, described neighboring contacts with described roof and is easy to the surface sliding along described roof, the bottom of described sidewall is provided with the peripheral flange extended radially inwardly, the upper surface of peripheral flange can engage with the lower surface edge of top pressing board, the upper surface of described top pressing board is provided with top pressure spring, and described top pressure spring is arranged between described top pressing board and diapire;
The top of drive motors connects with described gearbox bottom, described upper part of gear box connects with the bottom power of described polishing rotating driveshaft, described polishing rotating driveshaft extends from described gearbox, enter into described outer cover inner chamber through the through hole being arranged at described top pressing board and described diapire central authorities successively, described polishing rotating driveshaft can relative to described diapire and top pressing board axially-movable by described through hole; The upper part diameter of described polishing rotating driveshaft is greater than lower part diameter, thus formation shoulder, the inner ring upper surface of thrust bearing is arranged against described shoulder, described lower part is provided with external screw thread, bearing lock nut and described external screw thread threaded engagement, thus against the inner ring lower surface of described thrust bearing, described thrust bearing is locked, thus described thrust bearing is fixed on described polishing rotating driveshaft;
The upper surface of the outer ring of described thrust bearing can engage with the lower surface of described top pressing board;
The bottom of described drive motors is fixedly connected with bracket component, and described bracket component can drive described drive motors and described sanding component in the vertical direction to move up and down and in the horizontal direction along the apparent motion of described roof;
In non-polishing state, described spring top pressing board is biased be resisted against described peripheral flange upper surface on; Described rotary-grinding head retracts in described outer cover inner chamber and does not contact described roof;
When polishing, first bracket component makes described neighboring contact described roof, then described polishing rotating driveshaft is made to move upward, thus make thrust bearing engage described top pressing board, thus by spring, pressure on top surface is delivered to the described neighboring of described outer cover, and rotary-grinding head contact roof is then made to polish.
By such scheme, owing to have employed guard apparatus, it effectively can prevent dust dispersion in bruting process.And, by required pressure on top surface of polishing in bruting process, the pressure on top surface of suitable size can be delivered to guard shield, thus can close tight between guard shield neighboring and the surface of roof; And because needs grinding head carries out planar movement in bruting process, the present invention, by the semi-circular cross-section of guard shield neighboring, can make guard shield follow grinding head swimmingly and move in the plane.Thus carrying out smoothly of can ensureing to polish, can ensure again simultaneously dust not large area disseminate.
Wherein, by bracket component, it can drive grinding head to carry out plane motion and elevating movement; Stop pin wherein can be changed between pattern fixing in motor rotation in adjustment elevating movement and bruting process, fully can meet the lifting needs of sanding apparatus and rotate two aspect requirements of fixing needs.That is, this bracket component is adapted to the grinding head having concrete running and fixing requirement of the present invention especially.
Accompanying drawing explanation
Fig. 1 is the structural representation of sanding apparatus of the present invention.
Fig. 2 is the assembly structure schematic diagram at bearing 5 place of sanding apparatus in Fig. 1.
Detailed description of the invention
Below in conjunction with Fig. 1-2, the present invention is described in detail.
A kind of building roof sanding apparatus of variable-ratio, for the roof 1 of building of polishing, comprise sanding component 2, drive motors 3 and bracket component 6, wherein, sanding component 2 is for performing polishing processing, drive motors operates for driving sanding component 2, and bracket component 6 is for carrying sanding component 2, gearbox 7 and drive motors 3
Wherein, sanding component 2 comprises outer cover, described outer cover comprises the sidewall 21 and diapire 22 that are integrally formed, sidewall 21 and diapire 22 surround and form outer cover inner chamber 24, outer cover inner chamber 24 is for holding rotary-grinding head 42, and the open upper end of outer cover inner chamber 24, for stretching out to contact described roof 1 for rotary-grinding head 42, rotary-grinding head 42 is fixedly connected with by the upper end of linking arm 41 with polishing rotating driveshaft 4, described rotary-grinding head 42, the upper end of linking arm 41 and polishing rotating driveshaft 4 is all contained in described outer cover inner chamber 24, when polishing, described outer cover inner chamber 24 can stop disseminating and can collecting polishing powder dirt of polishing dust,
The top of described sidewall 21 is the neighboring 25 in semicircular in shape cross section, described neighboring 25 contacts with described roof 1 and is easy to the surface sliding along described roof 1, the bottom of described sidewall 21 is provided with the peripheral flange 23 extended radially inwardly, the upper surface of peripheral flange 23 can engage with the lower surface edge of top pressing board 27, the upper surface of described top pressing board 27 is provided with top pressure spring 26, and described top pressure spring 26 is arranged between described top pressing board 27 and diapire 22;
The top of drive motors 3 connects with described gearbox 7 bottom, described gearbox 7 top connects with the bottom power of described polishing rotating driveshaft 4, described polishing rotating driveshaft 4 extends from described gearbox 7, enter into described outer cover inner chamber 24 through the through hole being arranged at described top pressing board 27 and described diapire 22 central authorities successively, described polishing rotating driveshaft 4 can relative to described diapire 22 and top pressing board 27 axially-movable by described through hole; The upper part diameter of described polishing rotating driveshaft 4 is greater than lower part diameter, thus form shoulder 410, inner ring 51 upper surface of thrust bearing 5 is arranged against described shoulder 410, described lower part is provided with external screw thread, bearing lock nut 420 and described external screw thread threaded engagement, thus against the inner ring lower surface of described thrust bearing 5, described thrust bearing 5 is locked, thus described thrust bearing 5 is fixed on described polishing rotating driveshaft 4;
The upper surface of the outer ring 52 of described thrust bearing 5 can engage with the lower surface of described top pressing board 27;
The bottom of described drive motors 3 is fixedly connected with bracket component 6, and described bracket component 6 can drive described drive motors 3 and described sanding component 2 in the vertical direction to move up and down and in the horizontal direction along the apparent motion of described roof 1;
In non-polishing state, described spring 26 is resisted against on the upper surface of described peripheral flange 23 by biased for top pressing board 27; Described rotary-grinding head 42 retracts in described outer cover inner chamber and does not contact described roof 1;
When polishing, first bracket component 6 makes described neighboring 25 contact described roof 1, then described polishing rotating driveshaft 4 is made to move upward, thus make thrust bearing 5 engage described top pressing board 27, thus by spring 26, pressure on top surface is delivered to the described neighboring 25 of described outer cover, and then make rotary-grinding head 42 contact roof 1 to polish.
Valuably, wherein, there is gap 53 between the inner ring 51 of thrust bearing 5 and top pressing board 27.
Valuably, wherein, polish between rotating driveshaft 4 and top pressing board 27 and there is circular gap 220.
Valuably, wherein, described bracket component 6 comprises base 62, the bottom of described base 62 is provided with roller, can move on floor, the top of described base 62 is installed with stud 61, stud 61 and screw shell 31 threaded engagement, the upper end of described screw shell 31 is fixedly connected with drive motors 3, lower end is provided with flange portion 311, flange portion 311 is equipped with multiple stop pin 63, stop pin 63 can slide relative to described flange portion 311, and the lower end of stop pin 63 can coordinate with the lock hole 621 on base 62 upper surface, when needs are elevated described drive motors 3 and sanding component 2, described stop pin 63 is made to depart from described lock hole 621, and base 62 and stud 61 are rotated relative to screw shell 31, when needs are polished, described stop pin 63 is made to engage described lock hole 621 to lock relative to the rotation of screw shell 31 described base 62 and stud 61.

Claims (4)

1. the building roof sanding apparatus of a variable-ratio, for the roof (1) of building of polishing, comprise sanding component (2), drive motors (3) and bracket component (6), wherein, sanding component (2) is for performing polishing processing, and drive motors operates for driving sanding component (2), and bracket component (6) is for carrying sanding component (2), gearbox (7) and drive motors (3), it is characterized in that
Wherein, sanding component (2) comprises outer cover, described outer cover comprises the sidewall (21) and diapire (22) that are integrally formed, sidewall (21) and diapire (22) surround and form outer cover inner chamber (24), outer cover inner chamber (24) is for holding rotary-grinding head (42), and the open upper end of outer cover inner chamber (24), for stretching out to contact described roof (1) for rotary-grinding head (42), rotary-grinding head (42) is fixedly connected with by the upper end of linking arm (41) with polishing rotating driveshaft (4), described rotary-grinding head (42), the upper end of linking arm (41) and polishing rotating driveshaft (4) is all contained in described outer cover inner chamber (24), when polishing, described outer cover inner chamber (24) can stop disseminating and can collecting polishing powder dirt of polishing dust,
The top of described sidewall (21) is the neighboring (25) in semicircular in shape cross section, described neighboring (25) contacts with described roof (1) and is easy to the surface sliding along described roof (1), the bottom of described sidewall (21) is provided with the peripheral flange (23) extended radially inwardly, the upper surface of peripheral flange (23) can engage with the lower surface edge of top pressing board (27), the upper surface of described top pressing board (27) is provided with top pressure spring (26), described top pressure spring (26) is arranged between described top pressing board (27) and diapire (22);
The top of drive motors (3) connects with described gearbox (7) bottom, described gearbox (7) top connects with the bottom power of described polishing rotating driveshaft (4), described polishing rotating driveshaft (4) extends from described gearbox (7), enter into described outer cover inner chamber (24) through the through hole being arranged at described top pressing board (27) and described diapire (22) central authorities successively, described polishing rotating driveshaft (4) can relative to described diapire (22) and top pressing board (27) axially-movable by described through hole; The upper part diameter of described polishing rotating driveshaft (4) is greater than lower part diameter, thus form shoulder (410), inner ring (51) upper surface of thrust bearing (5) is arranged against described shoulder (410), described lower part is provided with external screw thread, bearing lock nut (420) and described external screw thread threaded engagement, thus against the inner ring lower surface of described thrust bearing (5), described thrust bearing (5) is locked, thus described thrust bearing (5) is fixed on described polishing rotating driveshaft (4);
The upper surface of the outer ring (52) of described thrust bearing (5) can engage with the lower surface of described top pressing board (27);
The bottom of described drive motors (3) is fixedly connected with bracket component (6), and described bracket component (6) can drive described drive motors (3) and described sanding component (2) in the vertical direction to move up and down and in the horizontal direction along the apparent motion of described roof (1);
In non-polishing state, described spring (26) is resisted against on the upper surface of described peripheral flange (23) by biased for top pressing board (27); Described rotary-grinding head (42) retracts in described outer cover inner chamber and does not contact described roof (1);
When polishing, bracket component (6) first makes described neighboring (25) contact described roof (1), then described polishing rotating driveshaft (4) is made to move upward, thus make thrust bearing (5) engage described top pressing board (27), thus by spring (26), pressure on top surface is delivered to the described neighboring (25) of described outer cover, and rotary-grinding head (42) contact roof (1) is then made to polish.
2., wherein, there is gap (53) between the inner ring (51) of thrust bearing (5) and top pressing board (27) in building roof sanding apparatus as claimed in claim 1.
3., wherein, between polishing rotating driveshaft (4) and top pressing board (27), there is circular gap (220) in building roof sanding apparatus as claimed in claim 1.
4. building roof sanding apparatus as claimed in claim 1, wherein, described bracket component (6) comprises base (62), the bottom of described base (62) is provided with roller, can move on floor, the top of described base (62) is installed with stud (61), stud (61) and screw shell (31) threaded engagement, the upper end of described screw shell (31) is fixedly connected with drive motors (3), lower end is provided with flange portion (311), flange portion (311) is equipped with multiple stop pin (63), stop pin (63) can slide relative to described flange portion (311), and the lower end of stop pin (63) can coordinate with the lock hole (621) on base (62) upper surface, when needs are elevated described drive motors (3) and sanding component (2), described stop pin (63) is made to depart from described lock hole (621), and base (62) and stud (61) are rotated relative to screw shell (31), when needs are polished, described stop pin (63) is made to engage described lock hole (621) to lock relative to the rotation of screw shell (31) described base (62) and stud (61).
CN201410516149.5A 2014-09-30 2014-09-30 A kind of building roof sanding apparatus of variable-ratio Active CN104259949B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410516149.5A CN104259949B (en) 2014-09-30 2014-09-30 A kind of building roof sanding apparatus of variable-ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410516149.5A CN104259949B (en) 2014-09-30 2014-09-30 A kind of building roof sanding apparatus of variable-ratio

Publications (2)

Publication Number Publication Date
CN104259949A CN104259949A (en) 2015-01-07
CN104259949B true CN104259949B (en) 2016-03-16

Family

ID=52151593

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410516149.5A Active CN104259949B (en) 2014-09-30 2014-09-30 A kind of building roof sanding apparatus of variable-ratio

Country Status (1)

Country Link
CN (1) CN104259949B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004056344A1 (en) * 2004-11-22 2006-05-24 Kaefer Isoliertechnik Gmbh & Co Kg Holder for grinding machine, has undercarriage and retainer, which are connected with each other by support, where retainer is pre-stressed in direction positioned away from undercarriage, and powder sucker for sucking of grinding powder
CN2882899Y (en) * 2005-09-01 2007-03-28 广州文冲船厂有限责任公司 Propeller dresser
CN201325973Y (en) * 2008-12-24 2009-10-14 浙江省湖州二轻机械总厂 Driving sealing device of blade grinder of lap shaver
CN202010924U (en) * 2011-03-09 2011-10-19 周乔平 Dust-free grinder
CN202411989U (en) * 2012-01-14 2012-09-05 黑龙江科技学院 Speed variable wall grinding machine
CN203266329U (en) * 2013-04-27 2013-11-06 方铝清 Driving motor and bead grinding machine grinding disk lifting mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004056344A1 (en) * 2004-11-22 2006-05-24 Kaefer Isoliertechnik Gmbh & Co Kg Holder for grinding machine, has undercarriage and retainer, which are connected with each other by support, where retainer is pre-stressed in direction positioned away from undercarriage, and powder sucker for sucking of grinding powder
CN2882899Y (en) * 2005-09-01 2007-03-28 广州文冲船厂有限责任公司 Propeller dresser
CN201325973Y (en) * 2008-12-24 2009-10-14 浙江省湖州二轻机械总厂 Driving sealing device of blade grinder of lap shaver
CN202010924U (en) * 2011-03-09 2011-10-19 周乔平 Dust-free grinder
CN202411989U (en) * 2012-01-14 2012-09-05 黑龙江科技学院 Speed variable wall grinding machine
CN203266329U (en) * 2013-04-27 2013-11-06 方铝清 Driving motor and bead grinding machine grinding disk lifting mechanism

Also Published As

Publication number Publication date
CN104259949A (en) 2015-01-07

Similar Documents

Publication Publication Date Title
CN104209830A (en) Hydraulic lifting polishing device for building roof
CN104209831B (en) A kind of building roof sanding apparatus with dust exhaust apparatus
CN104209829B (en) The dust-proof sanding apparatus of a kind of building roof
CN104227520B (en) A kind of building roof sanding apparatus with dust hopper
CN104289988B (en) A kind of method utilizing sanding apparatus polishing building roof
CN104259949B (en) A kind of building roof sanding apparatus of variable-ratio
CN104259945B (en) A kind of building roof polishing control system
CN104259948B (en) A kind of building roof sanding apparatus collecting dust
CN104259947A (en) Building roof grinding device with grinding heads convenient to replace
CN104227522B (en) A kind of method of control system polishing building roof of polishing
CN104227519B (en) A kind of building roof sanding apparatus clearing up dust
CN104227518B (en) A kind of building roof sanding apparatus
CN104227521B (en) A kind of operation method clearing up the building roof sanding apparatus of dust
CN104259946B (en) A kind of building roof sensing control sanding apparatus
CN202517364U (en) Semi-circle plate polishing device
CN103128626B (en) A kind of rotation axis moving seal structure
CN204221556U (en) A kind of surface processing device for inner hole of workpiece groove
US10399162B2 (en) Gear processing machine having a bellows
CN206140297U (en) Grinding machine workbench
KR101596598B1 (en) Wafer polishing apparatus
CN206216419U (en) A kind of chamfer mechanism
CN204381850U (en) A kind of dual stage face interlock turntable
CN202588165U (en) Base structure of manual noodle shaking machine
CN104117884B (en) The method improving cross slip-ring grinding accuracy
CN104227530A (en) Surface treatment device for groove of workpiece inner hole

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C41 Transfer of patent application or patent right or utility model
CB03 Change of inventor or designer information

Inventor after: Yu Bingqiang

Inventor before: Wang Tao

COR Change of bibliographic data
TA01 Transfer of patent application right

Effective date of registration: 20160219

Address after: 311819, No. 143, Pan Village, Zhao town, Zhuji City, Zhejiang, Shaoxing

Applicant after: Yu Bingqiang

Address before: Jin Feng Cun Tang Fan Jin Feng Xiang Chunan County of Hangzhou City, Zhejiang Province, No. 57 311701

Applicant before: CHUN'AN WANG'AO MACHINERY SCIENCE & TECHNOLOGY CO., LTD.

C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
CB03 Change of inventor or designer information

Inventor after: Liu Xin

Inventor after: Qiu Zhengqing

Inventor after: Wei Guobin

Inventor after: Zhang Jian

Inventor before: Yu Bingqiang

COR Change of bibliographic data
TR01 Transfer of patent right

Effective date of registration: 20160920

Address after: 102209, No. 3, YAN Dan, Beiqijia Town, Beijing, Changping District

Patentee after: Beijing urban construction Yuandong Construction Investment Group Co Ltd

Address before: 311819, No. 143, Pan Village, Zhao town, Zhuji City, Zhejiang, Shaoxing

Patentee before: Yu Bingqiang