CN107953220A - The self-centering high-efficiency grinding machine device of Internal and external cycle - Google Patents
The self-centering high-efficiency grinding machine device of Internal and external cycle Download PDFInfo
- Publication number
- CN107953220A CN107953220A CN201711433468.XA CN201711433468A CN107953220A CN 107953220 A CN107953220 A CN 107953220A CN 201711433468 A CN201711433468 A CN 201711433468A CN 107953220 A CN107953220 A CN 107953220A
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- CN
- China
- Prior art keywords
- roller
- internal
- module
- becket
- interior
- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0092—Grinding attachments for lathes or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention provides a kind of self-centering high-efficiency grinding machine device of Internal and external cycle, it includes housing, and three horizontal interior rollers, outer roller, driven rollers are extended with front of the housing；The interior roller, outer roller, driven roller are sequentially connected with internal module, outer mold piece, the drive module being assemblied in the housing respectively；The vertical litter of assembling in the housing, the internal module is assembled with the litter vertical sliding, becket outer ring to be processed is assemblied in abrasive material set and the actuating sleeve top of driven roller of the outer roller, and the abrasive material of the interior roller is sleeved on the inner ring that the becket is pressed under the action of the internal module gravity.The device positions becket by three roll structures, drives becket spinning campaign by the actuating sleeve in driven roller, abrasive machining is carried out at the same time to the Internal and external cycle of becket by interior roller, outer roller, more efficient.
Description
Technical field
The present invention relates to plate face processing technique field, and in particular to a kind of self-centering high-efficiency grinding machine device of Internal and external cycle.
Background technology
Ring parts are the parts being commonly used in production, and ring parts are usually needed in part in processing
Outer ring is ground processing so that the Internal and external cycle of ring parts is smooth enough, so can cause the assembling of ring parts more
It is accurate.But traditional processing is typically that the Internal and external cycle of part is processed respectively, in the inner ring progress to ring parts
, it is necessary to be fixed by the outer ring of ring parts during processing, then the inner ring of ring parts is processed, and to ring class zero
, it is necessary to which the inner ring of ring parts is fixed when the outer ring of part is processed.Traditional fixed form generally use triangle card
Disk is completed, and is clamped ring parts using triangle chuck or during stretching, triangle chuck only acts on ring parts
On three points, such ring parts can produce small deformation in processing, and by finished ring parts from triangle chuck
On when unloading, ring parts can recover shape, so that the inner ring of ring parts or outer ring processing are not accurate enough.And pass
The Internal and external cycle processing of system ring parts is, it is necessary to which multiple clamping is dismantled, and process is cumbersome, and work efficiency is relatively low.
The content of the invention
In view of the above problems, the present invention provides a kind of processing efficiency higher, the Internal and external cycle of ring parts can be added at the same time
Work, at the same in part process deformation smaller the self-centering high-efficiency grinding machine device of Internal and external cycle.
The technical solution adopted by the present invention to solve the technical problems is：The self-centering high-efficiency grinding machine device of the Internal and external cycle includes shell
Body, the housing front are extended with three horizontal interior rollers, outer roller, driven rollers, and the interior roller, outer roller, driven roller are parallel to each other,
The interior roller is above, and for the outer roller with driven roller axis in same level, the outer roller is opposite with driven roller axis
Vertical plane where the interior roll axis is symmetrical；The interior roller, outer roller, driven roller respectively with the internal module in the housing, external mold
Block, drive module are sequentially connected, and the outside of the interior roller and outer roller is each equipped with the abrasive material set of annular, the outside of the driven roller
It is equipped with actuating sleeve；The vertical litter of assembling in the housing, the internal module is assembled with the litter vertical sliding, to be processed
Becket outer ring be assemblied in abrasive material set and the actuating sleeve top of driven roller of the outer roller, the abrasive material of the interior roller is sleeved on institute
The inner ring that the becket is pressed under the action of internal module gravity is stated, the frictional force between the actuating sleeve and becket is more than
Frictional force between the abrasive material set and becket.
Preferably, the internal module, outer mold piece, drive module can control interior roller, outer roller, the rotation of driven roller speed change respectively
Transhipment is dynamic.
Preferably, being equipped with two litter in the housing, two litter slide with the internal module fill respectively
Match somebody with somebody.
Preferably, the lower part of the outer roller and driven roller is equipped with lower strand cable module, the outer end of the interior roller passes through axis
Take up and be furnished with rotating ring, detachably assembled between the rotating ring and the lower spring.
As priority, the lower part of the rotating ring is connected by lower spring with the twisted wire of lower strand cable module；The housing
Top is equipped with strand cable module, and the upper strand cable module is connected by upper spring with the internal module, the upper strand cable module
On be equipped with force-measuring module, the force-measuring module is connected with the control module of equipment.
Preferably, being designed with the groove of annular on the actuating sleeve, the becket is placed on the groove when processing
Interior, the external process of the abrasive material set has the abrasive groove of annular, and becket to be processed is placed in abrasive groove.
The beneficial effects of the present invention are：The self-centering high-efficiency grinding machine device of this Internal and external cycle is in use, first pass through internal module by interior roller
Heighten, then by becket outer ring to be processed be placed on the outer roller, driven roller top, then the internal module is put
Under, pass through the effect of gravity so that the abrasive material set of the interior roller is pressed on the inner ring of becket, so but works as the internal model
When block, outer mold piece, drive module drive the interior roller, outer roller, driven roller rotation respectively, due to actuating sleeve and metal in driven roller
Ring friction coefficient is higher so that becket follows driven roller to move, and the interior roller, outer roller do not use speed with the driven roller
Degree, the abrasive material set on so described interior roller, outer roller produce relative friction respectively to the becket Internal and external cycle, so that by becket
Internal and external cycle polish, which positions becket by three roll structures, and metal is driven by actuating sleeve in driven roller
Ring spinning campaign, abrasive machining is carried out at the same time by interior roller, outer roller to the Internal and external cycle of becket, more efficient.Simultaneously because
The stress point of the becket is in different rotary courses, and becket in process, will not be because of clamping to metal
The Internal and external cycle of ring impacts, machining accuracy higher.
Brief description of the drawings
Fig. 1 is the structure diagram of the self-centering high-efficiency grinding machine device positive direction of Internal and external cycle.
Fig. 2 is the lateral cross-sectional view of the self-centering high-efficiency grinding machine device of Internal and external cycle.
Embodiment
With reference to embodiment, the present invention is further described：
As shown in embodiment in Fig. 1 and Fig. 2, the self-centering high-efficiency grinding machine device of the Internal and external cycle includes housing 1, before the housing 1
Side is extended with three horizontal interior rollers 2, outer roller 3, driven rollers 4, and the interior roller 2, outer roller 3, driven roller 4 are parallel to each other, described interior
Roller 2 is above, and the outer roller 3 and 4 axis of driven roller are in same level, the outer roller 3 institute opposite with 4 axis of driven roller
Vertical plane where stating interior roll axis is symmetrical；Watched from front, the interior roller 2, outer roller 3, driven roller 4 are into isosceles triangle.
In the present embodiment, the interior roller 2, outer roller 3, driven roller 4 respectively with the internal module 21 in the housing 1, outer mold piece 31, driving mould
Block 41 is sequentially connected, and the internal module 21, outer mold piece 31, drive module 41 connect independent power plant module respectively.
In specific design, the outside of the interior roller 2 and outer roller 3 is each equipped with the abrasive material set of annular, the driven roller 4
The actuating sleeve that the flexible elastomeric material of external mounting makes；The abrasive material set and actuating sleeve are vulnerable part, it is necessary to the side of being designed as
Just replacement structure.The vertical litter 11 of assembling in the housing 1, the internal module 21 are filled with 11 vertical sliding of litter
Match somebody with somebody, 21 upper design of internal module has the module that can be pulled up.5 outer ring of becket to be processed is assemblied in described
The abrasive material set of outer roller 3 and the actuating sleeve top of driven roller 4, the abrasive material of the interior roller 2 are sleeved on the effect of the internal module gravity
Under be pressed on the inner ring of the becket 5, the frictional force between the actuating sleeve and becket 5 is more than the abrasive material and covers and metal
Frictional force between ring 5.
The self-centering high-efficiency grinding machine device of this Internal and external cycle heightens interior roller 2 in use, first passing through internal module 21, then will be to be added
5 outer ring of becket of work is placed on the outer roller 3, the top of driven roller 4, then puts down the internal module 21, passes through gravity
Effect so that the abrasive material set of the interior roller 2 is pressed on the inner ring of becket 5, so but when the internal module 21, outer mold piece
31st, when drive module 41 drives the interior roller 2, outer roller 3, the rotation of driven roller 4 respectively, due to actuating sleeve and metal in driven roller 4
5 friction coefficient of ring is higher so that becket 5 follows driven roller 4 to move, and the interior roller 2, outer roller 3 are not adopted with the driven roller 4
With speed, the abrasive material set on so described interior roller 2, outer roller 3 produces relative friction respectively to 5 Internal and external cycle of becket, so that
The Internal and external cycle of becket 5 is polished, which positions becket 5 by three roll structures, by the internal module 21 with
The gravity of interior roller 2 provides friction pressure to the becket 5.The device drives becket 5 certainly by the actuating sleeve in driven roller 4
Rotary motion, abrasive machining is carried out at the same time by interior roller 2, outer roller 3 to the Internal and external cycle of becket 5, more efficient.Simultaneously because institute
The stress point for stating becket 5 is in different rotary courses, and becket 5 in process, will not be because of clamping to metal
The Internal and external cycle of ring 5 impacts, machining accuracy higher.
In specific design, the internal module 21, outer mold piece 31, drive module 41 can control respectively interior roller 2, outer roller 3,
4 speed-changing rotation of driven roller moves.I.e. described internal module 21, outer mold piece 31, drive module 41 can be respectively to the interior rollers 2, outer
Roller 3, driven roller 4 carry out rotating gearshift adjustment.In the present embodiment, interior roller 2, outer roller 3, driven roller 4 can be designed as phase
Same outer diameter.So after the inner ring dimensioned qualification of the becket 2, pass through the rotating speed of roller in adjusting 2 so that institute
It is identical with the linear velocity of actuating sleeve in driven roller 4 to state the linear velocity that abrasive material covers on interior roller 2, abrasive material set pair on so described interior roller 2
5 inner ring of becket does not just have relative motion, grinding would not be carried out to it, only the abrasive material set of outer roller 3 is to metal
5 outer ring of ring is processed.And when 5 outer ring size of becket reaches requirement and inner ring is not reaching to when requiring, it is only necessary to by outer roller 3
It is identical with rotational speed regulation in driven roller 4, then abrasive material set will not be processed 5 outer ring of becket on outer roller 3, only interior roller 2
Abrasive material set 5 inner ring of becket is processed.It can so facilitate and becket Internal and external cycle is processed, reach regulation
Size.
In specific design, as shown in Figure 1, two litter 11 are equipped with the housing 1, two 11 or so pairs of litter
Claim.Two litter 11 respectively with 21 slidable fit of internal module.Two litter 11 can cause the internal module 21
Move up and down and more stablize.
In specific design, as depicted in figs. 1 and 2, the lower part of the outer roller 3 and driven roller 4 is equipped with lower strand cable module
6, the outer end of the interior roller 2 is equipped with rotating ring 22 by bearing, and the rotating ring 22 can be kept when the interior roller 2 rotates
It is motionless.The lower part of the rotating ring 22 is connected by lower spring 61 with the twisted wire of lower strand cable module 6；The rotating ring 22 with it is described
Detachably assembled between lower spring 61.When needing to assemble becket 5, the rotating ring 22 and lower spring 61 and lower strand cable mould
Block 6 it is separated, and after becket 5 installs, lower spring 61 can be connected with rotating ring 22, pass through the lower strand cable
Module 6 tenses the rotating ring 22 so that abrasive material set so may be used 5 or so the stress balance of becket on the interior roller 2
Further to reduce mismachining tolerance of the device to the becket.
As depicted in figs. 1 and 2, the top of the housing 1 is equipped with strand cable module 7, and the upper strand cable module 7 is by upper
Spring 71 is connected with the internal module 21, is equipped with force-measuring module in the upper strand cable module 7, the force-measuring module and equipment
Control module is connected.The upper strand cable module 7 can carry out upper downward by strand cable structure to the internal module 21 and interior roller 2
Section, while the upper strand cable module 7 can adjust the dynamics that interior roller 2 is pressed on 5 inner ring of becket by upper spring 71.
In specific design, the upper spring 71 spring identical with lower 61 use of spring, becomes after being so processed with becket 5
Thin, the upper spring 71 is pulled down so that the dynamics that internal module 21 is applied to interior 2 side of roller diminishes, and lower spring described at the same time
61 are loosened downwards so that the dynamics that rotating ring 22 is applied to interior 2 opposite side of roller synchronously diminishes, and so described interior roller 2 is to metal
Dynamics that ring applies or so is synchronous to be changed, uniform force, can further improve the machining accuracy of becket 5.The device can be with
The processing dimension that becket 5 is judged with stress is shunk by the strand cable of the upper strand cable module 7, may then pass through described to dress
The control module put realizes the movement for automatically controlling the internal module 21, outer mold piece 31, drive module 41, so as to fulfill entirely setting
Standby control.
The groove of annular is designed with the actuating sleeve at the same time, the becket is placed in the groove when processing, institute
Stating the external process of abrasive material set has the abrasive groove of annular, and becket to be processed is placed in abrasive groove.On the actuating sleeve
Groove can place becket 5 and go here and there out at work, and the abrasive groove of the abrasive material set is convenient to process chamfering on becket, together
When can also further prevent becket vibration.
The foregoing is merely the present invention preferred mode, be not intended to limit the invention, it is all the spirit and principles in the present invention it
Interior, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of self-centering high-efficiency grinding machine device of Internal and external cycle, it includes housing（1）, it is characterised in that：The housing（1）Front
It is extended with three horizontal interior rollers（2）, outer roller（3）, driven roller（4）, the interior roller（2）, outer roller（3）, driven roller（4）It is mutually flat
OK, the interior roller（2）It is above, the outer roller（3）With driven roller（4）Axis is in same level, the outer roller（3）With
Driven roller（4）Vertical plane where the relatively described interior roll axis of axis is symmetrical；The interior roller（2）, outer roller（3）, driven roller（4）Respectively
With the housing（1）Interior internal module（21）, outer mold piece（31）, drive module（41）It is sequentially connected, the interior roller（2）With outer roller
（3）Outside be each equipped with annular abrasive material set, the driven roller（4）External mounting have actuating sleeve；The housing（1）It is built-in
With vertical litter（11）, the internal module（21）With the litter（11）Vertical sliding is assembled, becket to be processed（5）Outside
Circle is assemblied in the outer roller（3）Abrasive material set and driven roller（4）Actuating sleeve top, the interior roller（2）Abrasive material be sleeved on institute
State and be pressed on the becket under the action of internal module gravity（5）Inner ring, the actuating sleeve and becket（5）Between friction
Power is more than abrasive material set and becket（5）Between frictional force.
2. the self-centering high-efficiency grinding machine device of Internal and external cycle according to claim 1, it is characterised in that：The internal module（21）、
Outer mold piece（31）, drive module（41）Interior roller can be controlled respectively（2）, outer roller（3）, driven roller（4）Speed-changing rotation moves.
3. the self-centering high-efficiency grinding machine device of Internal and external cycle according to claim 1, it is characterised in that：The housing（1）It is built-in
Equipped with two litter（11）, two litter（11）Respectively with the internal module（21）Slidable fit.
4. the self-centering high-efficiency grinding machine device of Internal and external cycle according to claim 1, it is characterised in that：The outer roller（31）And drive
Dynamic roller（4）Lower part be equipped with lower strand cable module（6）, the interior roller（21）Outer end rotating ring is equipped with by bearing（22）,
The rotating ring（22）With the lower spring（61）Between detachably assemble.
5. the self-centering high-efficiency grinding machine device of Internal and external cycle according to claim 4, it is characterised in that：The rotating ring（22）'s
Lower part passes through lower spring（61）With lower strand cable module（6）Twisted wire be connected；The housing（1）Top be equipped with strand cable module
（7）, the upper strand cable module（7）Pass through upper spring（71）With the internal module（21）It is connected, the upper strand cable module（7）Upper dress
Equipped with force-measuring module, the force-measuring module is connected with the control module of equipment.
6. the self-centering high-efficiency grinding machine device of Internal and external cycle according to claim 1, it is characterised in that：Designed on the actuating sleeve
There is the groove of annular, the becket is placed in the groove when processing, and the external process of the abrasive material set has the mill of annular
Hopper, becket to be processed are placed in abrasive groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433468.XA CN107953220B (en) | 2017-12-26 | 2017-12-26 | Inner and outer ring self-centering efficient grinding machine device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433468.XA CN107953220B (en) | 2017-12-26 | 2017-12-26 | Inner and outer ring self-centering efficient grinding machine device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107953220A true CN107953220A (en) | 2018-04-24 |
| CN107953220B CN107953220B (en) | 2021-02-02 |
Family
ID=61957008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711433468.XA Active CN107953220B (en) | 2017-12-26 | 2017-12-26 | Inner and outer ring self-centering efficient grinding machine device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107953220B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396192A (en) * | 2018-11-20 | 2019-03-01 | 北京京诚之星科技开发有限公司 | Centring machine |
| CN110977676A (en) * | 2019-12-27 | 2020-04-10 | 惠州麦丰密封科技有限公司 | A unhairing limit device for processing O type circle |
| CN111070039A (en) * | 2020-01-08 | 2020-04-28 | 侯世杰 | High-efficiency grinding machine |
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|---|---|---|---|---|
| DE4009571A1 (en) * | 1990-03-24 | 1991-09-26 | Thielenhaus Ernst Kg | Grinding machine for rolling bearing rings - has ring resting on three support rollers and driven by locating rollers at periphery |
| JPH03251353A (en) * | 1990-02-28 | 1991-11-08 | Hitachi Zosen Corp | Grinding for cylindrical workpiece |
| CN203245711U (en) * | 2013-04-27 | 2013-10-23 | 河南中原铁道车辆实业有限公司郑州分公司 | Full-automatic inner-and-outer circle polishing machine for processing inner ring and outer ring of bearing of passenger train |
| CN103481138A (en) * | 2013-09-16 | 2014-01-01 | 江苏阳明船舶装备制造技术有限公司 | Polisher for inner wall and outer wall of pipe |
| CN205968481U (en) * | 2016-08-30 | 2017-02-22 | 湖南南方搏云新材料股份有限公司 | A carbon felt heat preservation section of thick bamboo cylindrical grinding processingequipment |
| CN206747481U (en) * | 2017-03-04 | 2017-12-15 | 金一澄 | A kind of Ring Rolling Machine |
-
2017
- 2017-12-26 CN CN201711433468.XA patent/CN107953220B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03251353A (en) * | 1990-02-28 | 1991-11-08 | Hitachi Zosen Corp | Grinding for cylindrical workpiece |
| DE4009571A1 (en) * | 1990-03-24 | 1991-09-26 | Thielenhaus Ernst Kg | Grinding machine for rolling bearing rings - has ring resting on three support rollers and driven by locating rollers at periphery |
| CN203245711U (en) * | 2013-04-27 | 2013-10-23 | 河南中原铁道车辆实业有限公司郑州分公司 | Full-automatic inner-and-outer circle polishing machine for processing inner ring and outer ring of bearing of passenger train |
| CN103481138A (en) * | 2013-09-16 | 2014-01-01 | 江苏阳明船舶装备制造技术有限公司 | Polisher for inner wall and outer wall of pipe |
| CN205968481U (en) * | 2016-08-30 | 2017-02-22 | 湖南南方搏云新材料股份有限公司 | A carbon felt heat preservation section of thick bamboo cylindrical grinding processingequipment |
| CN206747481U (en) * | 2017-03-04 | 2017-12-15 | 金一澄 | A kind of Ring Rolling Machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396192A (en) * | 2018-11-20 | 2019-03-01 | 北京京诚之星科技开发有限公司 | Centring machine |
| CN109396192B (en) * | 2018-11-20 | 2023-08-29 | 北京京诚瑞信长材工程技术有限公司 | Centering machine |
| CN110977676A (en) * | 2019-12-27 | 2020-04-10 | 惠州麦丰密封科技有限公司 | A unhairing limit device for processing O type circle |
| CN110977676B (en) * | 2019-12-27 | 2021-05-18 | 惠州麦丰密封科技有限公司 | A unhairing limit device for processing O type circle |
| CN111070039A (en) * | 2020-01-08 | 2020-04-28 | 侯世杰 | High-efficiency grinding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107953220B (en) | 2021-02-02 |
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Inventor after: Ren Qing Inventor after: Feng Jie Inventor after: Hu Zhenqiang Inventor before: Hu Zhenqiang |
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Effective date of registration: 20210113 Address after: 518100 building 2-2, tongfuyu Industrial Zone, Aiqun Road, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Ren Qing Applicant after: Feng Jie Address before: 215000 7, floor 3, 3 Commercial Plaza, 125 Tung Wu South Road, Wuzhong District, Jiangsu. Applicant before: Hu Zhenqiang |
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Effective date of registration: 20211229 Address after: 467000 Fuyang Zhen Dong Yang Shi Cun, Xinhua District, Pingdingshan City, Henan Province Patentee after: Pingdingshan Dingli Coal Mine Machinery Co.,Ltd. Address before: 518100 building 2-2, tongfuyu Industrial Zone, Aiqun Road, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Ren Qing Patentee before: Feng Jie |