CN106988373A - A kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin - Google Patents
A kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin Download PDFInfo
- Publication number
- CN106988373A CN106988373A CN201710325051.5A CN201710325051A CN106988373A CN 106988373 A CN106988373 A CN 106988373A CN 201710325051 A CN201710325051 A CN 201710325051A CN 106988373 A CN106988373 A CN 106988373A
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- China
- Prior art keywords
- bearing pin
- locating part
- cydariform
- positioning
- locking device
- 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.)
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Links
- 241000219098 Parthenocissus Species 0.000 claims abstract description 29
- 230000013011 mating Effects 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000007704 transition Effects 0.000 claims abstract description 11
- 238000005461 lubrication Methods 0.000 claims abstract description 6
- 230000008520 organization Effects 0.000 claims abstract description 6
- 238000003860 storage Methods 0.000 claims abstract description 6
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000013036 cure process Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 6
- 230000007774 longterm Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin, including for coupling the bearing pin of creeper tread and positioner for alignment pin, it is characterized in that, the positioner includes transition piece, locating part, fixture and lubrication system, the head of the fixture is located in the through hole of locating part and forms storage organization with the upper end of locating part, the lubrication system includes screwed capping, kollag and sealing ring, screw thread of the locating part upper end provided with matching capping, lower end is provided with the groove for placing sealing ring, the kollag is placed in the storage organization, the upper end of the locating part passes through lidstock, lower end is sealed by sealing ring.Advantage：The mating surface of locating part and fixture is lubricated using kollag, it is ensured that locating part can be rotated freely flexibly with pin roll end face for a long time, and uses capping and sealing ring；The positioning and locking device, it is simple in construction, it is convenient to mount and dismount, reliability is high.
Description
Technical field
The present invention relates to a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin, belong to heavy engineering machinery
The running gear technical field of crawler belt.
Background technology
The running gear of ultra-large type hydraulic crawler excavator is general by crawler belt, driving wheel, thrust wheel, upper track wheel and guide wheel group
Into.Wherein crawler belt is core component, is the carrier that the driving force of running motor is converted to complete machine walking power.Ultra-large type
The creeper tread of hydraulic crawler excavator is generally one piece casting type, is coupled with bearing pin through pin-and-hole, creeper tread and bearing pin during walking
Stress is very big, will be deformed in the course of time.Therefore, the reliability of crawler belt bearing pin positioning largely determines crawler belt
The reliability of running gear.
Traditional bearing pin localization method, is that customization nut is only installed on the creeper tread near end part of pin shaft mostly, or
Boss and the machining of given shape are reserved on creeper tread, casting technique difficulty is big, machining cost is high, sells in the course of the work
Axle can be rotated in a circumferential direction and axial float, end touching location nut, and heavy wear is produced to end part of pin shaft and location nut,
Wear problem after long-term use is even more serious, and anti-loosing effect is not good, and bearing pin, which comes off, loses the risk of ability to act with complete machine
It is higher；In addition, positioner is mostly disposable, when need to untie the crawler belt of connection, then positioner must be cut off, it is time-consuming to take
Power.
The content of the invention
The technical problems to be solved by the invention are to overcome the defect of prior art there is provided a kind of compact conformation, assembly and disassembly side
Just, service life is long, and reliability is high, can self-lubricating ultra-large type hydraulic crawler excavator crawler belt bearing pin positioning and locking device.
In order to solve the above technical problems, the present invention provides a kind of positioning and locking dress of ultra-large type hydraulic crawler excavator crawler belt bearing pin
Put, including for coupling the bearing pin of creeper tread and positioner for alignment pin, it is characterized in that, the positioner water
The flat outboard end for being arranged on bearing pin, the positioner includes transition piece, locating part, fixture and lubrication system, wherein limiting
Space is provided between position part and the end face of bearing pin outboard end, the transition piece is provided with the cambered surface matched with creeper tread cambered surface and used
In avoid opening up on creeper tread the installation base of complexity with it is mach, the fixture sequentially passes through locating part and transition piece
Through hole be fixed, the head of the fixture is located in the through hole of locating part and forms storage organization with the upper end of locating part,
The lubrication system includes screwed capping, kollag and sealing ring, and the locating part upper end is covered provided with matching
Screw thread, lower end is provided with the groove for placing sealing ring, and the kollag is placed in the storage organization, the locating part
Upper end is sealed by lidstock, lower end by sealing ring.
Further, the fixture uses soket head cap screw, and the soket head cap screw head carries annular boss, to improve
Screw thread pair pretensioning effect, and annular groove is provided with the bottom of boss, screw thread is closely-pitched external screw thread.
Further, the transition piece uses the spacer with cambered surface, and the mating surface of the cambered surface and creeper tread matches, should
The mating surface of spacer and soket head cap screw is plane, and the mating holes with soket head cap screw is unthreaded hole, and both sides are circular arc, left and right up and down
Both sides are straight flange.
Further, the locating part carries out axial limiting to bearing pin using cydariform set, and the outer surface of cydariform set is cydariform
Face, both end of which is that taper surface, centre are arc surface, and inner side is two sections of shoulder holes, and wherein arc surface is contacted with pin roll end face, reality
Cash sale axial end and the rolling friction of cydariform inner room, wherein the first paragraph pore area positioned at cydariform face upper end has fine thread, are located at
Second sector hole of lower end is provided with the groove for placing sealing ring.
Further, the sealing ring uses O shape neoprene packing circles.
Further, the capping profile is in ladder plate-like and is provided with interior hexagonal, and lower cylindrical face carries interior with cydariform set
The closely-pitched external screw thread that screw thread is engaged.
Further, the control of the distance between end face of the cydariform outer rim of the cydariform set and bearing pin is in 2~3mm, cydariform
Set coordinates by the first sector hole of shoulder hole with soket head cap screw head face of cylinder small―gap suture, is freely rotatable, axially relies on axle
Shoulder is spacing.
Further, the mating surface and the cydariform face of cydariform set that the soket head cap screw covers with cydariform do impewdance matching
Cure process, to improve its wearability and service life.
The beneficial effect that the present invention is reached：
Compared with prior art, the present invention uses the spacer with cambered surface as transition piece between soket head cap screw and creeper tread,
The installation base that complexity is opened up on creeper tread and machining are avoided, and reduces casting risk；Using cydariform set to crawler belt
The axial direction of bearing pin is positioned, and the frictional force of pin roll end face and cydariform inner room is present with rolling friction, it is to avoid bearing pin etc. zero
The abrasion of part, the mating surface that cydariform set is secured to soket head cap screw is lubricated using kollag, it is ensured that cydariform set can be long-term
Flexibly rotate freely with pin roll end face, and using capping and neoprene seal with O ring, prevent lubricant from leaking outside and pollutant
Intrusion；The installation base that complexity is opened up on creeper tread and machining are avoided, and reduces casting risk；Avoid manufacture shape
The influence to spacing place contact surface such as creeper tread and bearing pin deformation, can have ideal all the time after position error and long-term use
Contact surface bears the play power of bearing pin vertically, it is to avoid cause chip off-falling or zero because the stupefied contact in side or extruding produce stress raisers
Part fails.The positioning and locking device, it is simple in construction, it is convenient to mount and dismount, reliability is high.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is soket head cap screw schematic diagram；
Fig. 3 is spacer schematic diagram；
Fig. 4 is that cydariform covers schematic diagram；
Fig. 5 is capping schematic diagram.
In figure：1st, soket head cap screw, 2, nut, 3, creeper tread, 4, spacer, 5, O-ring, 6, cydariform set, 7, capping, 8,
Bearing pin, 9, circular arc, 10, straight flange, 11 unthreaded holes, 12, cambered surface, 13, taper surface, 14, arc surface, 15, shoulder hole, 16, groove.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in figure 1, a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin, it is characterised in that including
Creeper tread 3, bearing pin 8, nut 2, soket head cap screw 1, spacer 4, O-ring 5, cydariform set 6 and capping 7.The device is located at bearing pin 8
Outboard end, is horizontally mounted, and after after two pieces of splits of creeper tread 3, pin-and-hole is sequentially passed through from outside to inside respectively with bearing pin 8, in advance by O
Shape circle 5 load cydariform set 6 groove in, then by soket head cap screw 1 pass through equipped with O-ring 5 cydariform set 6, then through every
Set 4, the cambered surface of adjustment spacer 4 merges with the cambered surface matching of creeper tread 3 tightens nut 2, and it is a certain amount of to cover the injection of 6 intracavitary in cydariform
Kollag, with capping 7 by the bore seal of cydariform set 6, prevents lubricant leakage and the intrusion of pollutant.
Preferably, the head of soket head cap screw 1 carries annular boss, to improve screw thread pair pretensioning effect, and in boss
Bottom be provided with annular groove, screw thread is closely-pitched external screw thread.
Preferably, the mating surface of spacer 4 and creeper tread 3 is cambered surface, and the mating surface with soket head cap screw 1 is plane, and interior
The mating holes of hex screw 1 is unthreaded hole 11, and both sides are circular arc 9 up and down, and the right and left is straight flange 10.
Preferably, the material of the O-ring 5 is neoprene.
Preferably, the outer surface of cydariform set 6 is cydariform face, and both end of which is that taper surface 13, centre are arc surface 14,
Inner side is two sections of shoulder holes 15, and wherein first paragraph pore area has fine thread, and the second sector hole is provided with the groove 16 for placing O-ring 5.
Preferably, 7 profiles of the capping are in ladder plate-like and are provided with interior hexagonal, and lower cylindrical face is carried and spiral shell in cydariform set
The closely-pitched external screw thread that line is engaged.
Preferably, the control of the distance between end face of the cydariform outer rim of the cydariform set 6 and bearing pin 8 is in 2~3mm, cydariform
Set 6 coordinates by the first sector hole of shoulder hole with the head face of cylinder H9/f8 of soket head cap screw 1 small―gap suture, is freely rotatable, axle
To relying on, the shaft shoulder is spacing.
Preferably, the cydariform is moistened between covering the mating surface on 6 first sector holes and the head of soket head cap screw 1 using kollag
Sliding, kollag is placed in the inner chamber of the two formation, and bottom is sealed to prevent lubricant from leaking outside using O-ring 5, and top uses envelope
Lid 7 seals to prevent the intrusion of pollutant.
Preferably, the soket head cap screw 1 covers 6 mating surface with cydariform and the cydariform face of cydariform set 6 is done sensing and quenched
Fiery cure process, to improve its wearability and service life.
Screw thread pair between the screw thread of above-mentioned soket head cap screw 1, cydariform set 6 and capping 7 is fine thread pair, with compared with
Good anti-loosing effect.
The mating surface of above-mentioned spacer 4 and creeper tread 3 is cambered surface, it is ensured that the validity of connection, it is to avoid opened on creeper tread 3
If complicated installation base and machining, and reduce casting risk.
Above-mentioned cydariform set 6 is spacing in face of the end face progress of bearing pin 8 using cydariform, can avoid Form and position error and long-term use
The influence to spacing place contact surface such as the deformation of creeper tread 3, flexural deformation of bearing pin 8, can there is ideal contact all the time afterwards
Bear the play power of bearing pin 8 vertically in face, it is to avoid cause chip off-falling or part because the stupefied contact in side or extruding produce stress raisers
Failure.Further, after crawler unit long-term use, even if creeper tread 3 and bearing pin 8 there occurs moderate finite deformation, positioning is anti-
Loose device still can be dismantled conveniently, be easy to disassemble caterpillar system and repaired or changed.
From said structure, the present invention uses the spacer with cambered surface to be used as transition between soket head cap screw and creeper tread
Part, it is to avoid installation base and the machining of complexity are opened up on creeper tread, and reduce casting risk, it is favorably improved simultaneously
The pretensioning effect of soket head cap screw and nut；The axial direction of crawler belt bearing pin is positioned using cydariform set, pin roll end face and cydariform
The frictional force of inner room is present with rolling friction, it is to avoid the abrasion of the part such as bearing pin, cydariform set is secured to soket head cap screw
Mating surface lubricated using kollag, it is ensured that cydariform set can be rotated freely flexibly with pin roll end face for a long time, and using capping
With neoprene seal with O ring, lubricant leakage and the intrusion of pollutant are prevented；Manufacture Form and position error, alignment error can be avoided
And the influence to spacing place contact surface such as creeper tread and bearing pin deformation after being used for a long time, there can be ideal contact surface all the time
Bear the play power of bearing pin vertically, it is to avoid cause chip off-falling or part to lose because the stupefied contact in side or extruding produce stress raisers
Effect.The positioning and locking device, while crawler unit reliability is ensured, has taken into account taken into account well well
Simplify track plate structure, reduction casting risk, and compact conformation, convenient disassembly, be particularly suitable for use in ultra-large type hydraulic crawler excavator.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these improve and deformed
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin, including for couple creeper tread bearing pin and
For the positioner of alignment pin, it is characterized in that, the positioner is horizontally set on the outboard end of bearing pin, positioning dress
Put including transition piece, locating part, fixture and lubrication system, be wherein provided between locating part and the end face of bearing pin outboard end
Space, the transition piece is provided with the cambered surface matched with creeper tread cambered surface for avoiding the installation for opening up complexity on creeper tread convex
Platform with it is mach, the fixture sequentially passes through locating part and the through hole of transition piece is fixed, the head of fixture position
In forming storage organization in the through hole of locating part and with the upper end of locating part, the lubrication system include screwed capping,
Kollag and sealing ring, screw thread of the locating part upper end provided with matching capping, lower end are provided with the groove for placing sealing ring,
The kollag is placed in the storage organization, and the upper end of the locating part passes through sealing ring by lidstock, lower end
Sealing.
2. a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin according to claim 1, it is characterized in that,
The fixture uses soket head cap screw, and the soket head cap screw head carries annular boss, to improve screw thread pair pretensioning effect, and
Annular groove is provided with the bottom of boss, screw thread is closely-pitched external screw thread.
3. a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin according to claim 2, it is characterized in that,
The transition piece uses the spacer with cambered surface, and the mating surface of the cambered surface and creeper tread matches, the spacer and soket head cap screw
Mating surface be plane, be unthreaded hole with the mating holes of soket head cap screw, both sides are circular arc up and down, and the right and left is straight flange.
4. a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin according to claim 1, it is characterized in that,
The locating part carries out axial limiting to bearing pin using cydariform set, and the outer surface of cydariform set is cydariform face, and both end of which is taper
Face, centre are arc surface, and inner side is two sections of shoulder holes, and wherein arc surface is contacted with pin roll end face, realizes pin roll end face and cydariform
The rolling friction of inner room, wherein the first paragraph pore area positioned at cydariform face upper end has fine thread, the second sector hole positioned at lower end is opened
There is the groove for placing sealing ring.
5. a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin according to claim 1, it is characterized in that,
The sealing ring uses O shape neoprene packing circles.
6. a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin according to right wants 2 or 4, its feature
It is that the capping profile is in ladder plate-like and is provided with interior hexagonal, lower cylindrical face is thin with what is be engaged with cydariform set internal thread
Tooth external screw thread.
7. a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin according to claim 4, it is characterized in that,
The control of the distance between the cydariform outer rim of the cydariform set and the end face of bearing pin is in 2~3mm, and cydariform set is by the first of shoulder hole
Sector hole coordinates with soket head cap screw head face of cylinder small―gap suture, is freely rotatable, axially spacing by the shaft shoulder.
8. a kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin according to claim 2 or 4, its feature
It is that the soket head cap screw does impewdance matching cure process with the mating surface of cydariform set and the cydariform face of cydariform set, to carry
High its wearability and service life.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710325051.5A CN106988373B (en) | 2017-05-10 | 2017-05-10 | Positioning and anti-loosening device for track pin shaft of ultra-large hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710325051.5A CN106988373B (en) | 2017-05-10 | 2017-05-10 | Positioning and anti-loosening device for track pin shaft of ultra-large hydraulic excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106988373A true CN106988373A (en) | 2017-07-28 |
| CN106988373B CN106988373B (en) | 2022-08-23 |
Family
ID=59417772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710325051.5A Active CN106988373B (en) | 2017-05-10 | 2017-05-10 | Positioning and anti-loosening device for track pin shaft of ultra-large hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106988373B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4182578A (en) * | 1978-03-24 | 1980-01-08 | Caterpillar Tractor Co. | Keeper assembly |
| CN101544248A (en) * | 2008-03-21 | 2009-09-30 | 董明国 | Hydraulic seal lubrication type caterpillar and connection method thereof |
| CN102381626A (en) * | 2011-11-04 | 2012-03-21 | 徐工集团工程机械股份有限公司 | Pin moving device, movable connecting structure and suspension hook structure |
| CN202326604U (en) * | 2011-11-21 | 2012-07-11 | 中联重科股份有限公司 | Pin shaft fixing device |
| CN206049843U (en) * | 2016-08-31 | 2017-03-29 | 徐州徐工矿山机械有限公司 | Ultra-large type engineering machinery crawler belt bearing pin positioning and locking structure |
| CN207130807U (en) * | 2017-05-10 | 2018-03-23 | 徐州徐工挖掘机械有限公司 | A kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin |
-
2017
- 2017-05-10 CN CN201710325051.5A patent/CN106988373B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4182578A (en) * | 1978-03-24 | 1980-01-08 | Caterpillar Tractor Co. | Keeper assembly |
| CN101544248A (en) * | 2008-03-21 | 2009-09-30 | 董明国 | Hydraulic seal lubrication type caterpillar and connection method thereof |
| CN102381626A (en) * | 2011-11-04 | 2012-03-21 | 徐工集团工程机械股份有限公司 | Pin moving device, movable connecting structure and suspension hook structure |
| CN202326604U (en) * | 2011-11-21 | 2012-07-11 | 中联重科股份有限公司 | Pin shaft fixing device |
| CN206049843U (en) * | 2016-08-31 | 2017-03-29 | 徐州徐工矿山机械有限公司 | Ultra-large type engineering machinery crawler belt bearing pin positioning and locking structure |
| CN207130807U (en) * | 2017-05-10 | 2018-03-23 | 徐州徐工挖掘机械有限公司 | A kind of positioning and locking device of ultra-large type hydraulic crawler excavator crawler belt bearing pin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106988373B (en) | 2022-08-23 |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190410 Address after: 221005 39 Gaoxin Road, Xuzhou Economic Development Zone, Jiangsu Applicant after: XUZHOU XCMG MINING MACHINERY Co.,Ltd. Address before: No. 39 Gaoxin Road, Xuzhou Economic and Technological Development Zone, Jiangsu Province, 221100 Applicant before: XCMG EXCAVATOR MACHINERY Co.,Ltd. |
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| GR01 | Patent grant |