CN204571983U - Girdle clear end formula flitting - Google Patents
Girdle clear end formula flitting Download PDFInfo
- Publication number
- CN204571983U CN204571983U CN201420860386.9U CN201420860386U CN204571983U CN 204571983 U CN204571983 U CN 204571983U CN 201420860386 U CN201420860386 U CN 201420860386U CN 204571983 U CN204571983 U CN 204571983U
- Authority
- CN
- China
- Prior art keywords
- cutting
- cutting drum
- drive cavity
- cavity housing
- drum drive
- 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.)
- Expired - Fee Related
Links
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The utility model provides formula flitting of a kind of girdle clear end, cutting units housing is by the first cutting drum drive cavity housing, transition section shell and the second cutting drum drive cavity housing composition, first cutting drum drive cavity housing to be extended to rib side beyond the ledge of the middle pan of scraper conveyor and lead-over groove by transition section shell and lower portion bends, transition section shell rear end is provided with top bevel trimming structure and bottom bevel trimming structure, the inner chamber flange of first planet mechanism and the second planetary mechanism is respectively by the inner chamber Flange joint of bolt and the first cutting drum drive cavity housing and the second cutting drum drive cavity housing, the outer face keyway of first planet mechanism and the second planetary mechanism is located respectively by the outer face keyway of end face flat key and the first cutting drum drive cavity housing and the second cutting drum drive cavity housing.The utility model effectively can solve the problem of Triangle Coal, meets the compliance of minimum mining height condition and Coal Seam Thickness Change, improves effect of loading coal.
Description
Technical field
The utility model relates to coal-cutting machinery field, particularly formula flitting of a kind of girdle clear end.
Background technology
At present, girdle flitting requires and Coal Seam Thickness Change compliance for meeting coal seam thickness, and the cutting drum diameter of selection is less, thus causes the depth of blade of cutting drum more shallow, has a strong impact on effect of loading coal.Need again to adopt curved rocker structure to add serious offense coal mouth, then cause the cutting drum amount of caunching less.In addition, in order to ensure the shovel spacing of cutting drum, the housing of cutting units straight-tooth driven end need ride over above channel for scraper transporter, then cause cutting drum planted agent to measure less.Due to the amount of caunching and planted agent amount all less, thus cause coal-winning machine working face compliance and Coal Seam Thickness Change compliance poor.
Simultaneously, the transition frame ledge at drag conveyor two ends above with the inclined-plane increased gradually, the housing of cutting units straight-tooth driven end so far has to raise in position, scrapper conveyor head and tail place is so just made easily to be formed " Triangle Coal ", " Triangle Coal " usually needs manually after being formed or other auxiliary equipment are cleared up, the operating efficiency of coal-winning machine can be made like this to reduce, but also extra cost can be increased.
These problems have a strong impact on the raising of production efficiency, in order to solve, effect of loading coal is poor, the amount of caunching and planted agent measure too small and " Triangle Coal " problem, usually take to strengthen cutting drum diameter, change the planetary mechanism number of teeth and modulus, reduce rocking arm flexibility, increase spillplate, reduce the method such as channel for scraper transporter height and lead-over groove gradient.But strengthen that although coal-winning machine cutting drum diameter effectively can solve that effect of loading coal is low, the amount of caunching and planted agent measure too small and " Triangle Coal " problem, but be subject to specific mining height restriction and along with the increasing of cutting drum diameter, the compliance of coal-winning machine to Coal Seam Thickness Change is poorer, required clipping force is also larger, the overall performance of cutting power and cutting units just needs corresponding increase to size, and machine-building cost and technological requirement also want corresponding raising; Adopt the change planetary mechanism number of teeth and modulus to reduce planetary mechanism external diameter, increase the depth of blade of cutting drum, although can improve effect of loading coal, the strength of gear teeth of planetary mechanism and bearing life can reduce accordingly; Reduce rocking arm flexibility, although can the amount of caunching be increased, have a strong impact on the size of coal mouth; Increasing spillplate causes shovel spacing to increase, and effect of loading coal fails effectively to improve; Reduce channel for scraper transporter height and lead-over groove gradient, although planted agent can be increased measure minimizing " Triangle Coal ", have a strong impact on scrapper conveyor overall performance.Can find out, adopt said method, coal-winning machine effect of loading coal is poor, the problem of working face bad adaptability, Coal Seam Thickness Change bad adaptability and " Triangle Coal " fails effectively solution.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides formula flitting of a kind of girdle clear end, effectively can solve the problem of " Triangle Coal ", adapt to thin seam mining, meet the compliance of minimum mining height condition and Coal Seam Thickness Change, improve coal-winning machine effect of loading coal, provide enough cutting drum amounts of caunching to measure to meet to combine with planted agent and adopt condition, thus reach that processing is simple, strong adaptability and the object of effectively enhancing productivity.
To achieve these goals, the utility model provides formula flitting of a kind of girdle clear end, comprise middle control cabinet, left tractive unit, right tractive unit, left cutting units and right cutting units, described left tractive unit and right tractive unit are connected to the both sides of middle control cabinet, described left cutting units, right cutting units is respectively by engaging lug and left tractive unit, right tractive unit connects, described right cutting units comprises right cutting units housing, cutting motor, clutch, straight-tooth transmission system, first cutting drum, second cutting drum, described cutting motor, clutch and straight-tooth transmission system are all arranged in the inner chamber of cutting units housing, and the power that cutting motor exports reaches straight-tooth transmission system by clutch, first planet mechanism and the second planetary mechanism is reached respectively after straight-tooth transmission system slows down shunting, the first cutting drum and the second cutting drum is exported respectively to again after first planet mechanism and the second planetary mechanism slow down, described cutting units housing is by the first cutting drum drive cavity housing, the overall structure of transition section shell and the second cutting drum drive cavity housing composition, described first cutting drum drive cavity housing to be extended to rib side beyond the middle pan of scraper conveyor ledge and lead-over groove ledge by transition section shell and lower portion bends, described transition section shell rear end is provided with top bevel trimming structure and bottom bevel trimming structure, the inner chamber flange of described first planet mechanism and the second planetary mechanism is respectively by the inner chamber Flange joint of bolt and the first cutting drum drive cavity housing and the second cutting drum drive cavity housing, and the outer face keyway of described first planet mechanism and the second planetary mechanism is located respectively by the outer face keyway of end face flat key and the first cutting drum drive cavity housing and the second cutting drum drive cavity housing, described left cutting units is identical with the structure of right cutting units, and symmetrical relative to middle control cabinet.
Further, the bolt place that the inner chamber flange of described first planet mechanism, the second planetary mechanism is connected with the first cutting drum drive cavity housing, the second cutting drum drive cavity housing is provided with gland, and gland is pressed on bolt by described straight-tooth transmission system.
Further, the length of described first cutting drum and the first cutting drum drive cavity housing length sum of extending to rib side is equal with the length of the second cutting drum.
Further, the direction of rotation of described first cutting drum and the second cutting drum is contrary, and rotating speed is identical, and the blade screw direction of described first cutting drum and the second cutting drum is contrary.
Further, also comprise the first internal spraying system, the second internal spraying system and external spraying system, described first internal spraying system and the second internal spraying system are separately positioned in first planet mechanism and the second planetary mechanism, the water channel of described first internal spraying system, the second internal spraying system and external spraying system is all laid on cutting units housing, described first cutting drum, the second cutting drum with cutting units housing is arranged respectively the nozzle be connected with external spraying system with the first internal spraying system, the second internal spraying system.
The girdle that the utility model provides clear end formula flitting, first cutting drum drive cavity housing extends to beyond the middle pan of scraper conveyor ledge and lead-over groove ledge by transition section shell to rib side, and transition section shell rear end is provided with top bevel trimming structure and bottom bevel trimming structure, make cutting units have enough amounts of caunching and planted agent amount to adapt to Coal Seam Thickness Change, meet to combine and adopt requirement, avoid the formation at scrapper conveyor frame head and tail place " Triangle Coal "; By the first cutting drum drive cavity housing lower portion warp architecture, effectively can reduce the center to center distance between two cutting drums, increase coal mouth, strengthen the effect of coalingging combining between two cutting drums; Be connected and outward flange key slot ends flat key location combined structure with the inner chamber flange bolt on the second planetary mechanism by first planet mechanism, the external diameter of planetary mechanism can be reduced, and then the degree of depth of cutting drum blade can be increased, improve effect of loading coal, increase the bonding strength of planetary mechanism and cutting units housing, improve efficiency of assembling and interchangeability, and there is more flexibility in manufacturing process; By arranging gland structure, effectively bolt looseness can be prevented, without the need to pretension bolt again, coal-winning machine productivity ratio can be can effectively improved when overhauling; By arranging two cutting drum structures, the distance of the second cutting drum and drag conveyor is less on the one hand, has good load bearing stength, improves effect of loading coal; Two cutting drums work on a coal-face simultaneously on the other hand, play gear coal and combined reinforced effect of coalingging, and improve utilization rate and the application life of cutting drum pick simultaneously, optimize cutting units overall performance, ensure the stability of coal-winning machine complete machine; By the setting of the first internal spraying system, the second internal spraying system and external spraying system, can make that the area coverage of water channel in this cutting units is large, the water yield is many and safe and reliable, effectively minimizing accident can occur and the maintenance and repair time, thus more effectively cool transmission system and fire extinguishing depositing dust.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the schematic diagram that the utility model matches with drag conveyor;
Fig. 3 is the structural representation of right cutting units in the utility model;
Fig. 4 is the middle part sectional schematic diagram that the utility model matches with drag conveyor;
Fig. 5 is the expansion sectional structure schematic diagram at Tu3Yan Ge center;
Fig. 6 is the structural representation of right another angle of cutting units in the utility model;
Fig. 7 is the A-A sectional structure schematic diagram of Fig. 6;
Fig. 8 is the partial enlargement structural representation that in the utility model, cutting units planetary mechanism is connected with cutting units housing.
In figure: 1, cutting units housing, 2, second cutting drum drive cavity housing, 3, transition section shell, 4, top bevel trimming, 5, bottom bevel trimming, 6, first cutting drum drive cavity housing, 7, cutting motor, 8, clutch, 9, straight-tooth transmission system, 10, first planet mechanism, 11, second planetary mechanism, 12, first internal spraying system, 13, second internal spraying system, 14, first cutting drum, 15, second cutting drum, 16, external spraying system, 17, end face flat key, 18, gland, 19, inner chamber flange, 20, outer face keyway, 21, middle control cabinet, 22, left tractive unit, 23, right tractive unit, 24, left cutting units, 25, right cutting units, 26, drag conveyor, 27, intermediate channel ledge, 28, lead-over groove ledge.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Fig. 1 to Fig. 8, formula flitting of a kind of girdle clear end, comprise middle control cabinet 21, left tractive unit 22, right tractive unit 23, left cutting units 24 and right cutting units 25, described left tractive unit 22 and right tractive unit 23 are connected to the both sides of middle control cabinet 21, described left cutting units 24, right cutting units 25 is respectively by engaging lug and left tractive unit 22, right tractive unit 23 connects, described right cutting units 25 comprises right cutting units housing 1, cutting motor 7, clutch 8, straight-tooth transmission system 9, first cutting drum 14, second cutting drum 15, described cutting motor 7, clutch 8 and straight-tooth transmission system 9 are all arranged in the inner chamber of cutting units housing 1, and the power that cutting motor 7 exports reaches straight-tooth transmission system 9 by clutch 8, first planet mechanism 10 and the second planetary mechanism 11 is reached respectively after straight-tooth transmission system 9 slows down shunting, the first cutting drum 14 and the second cutting drum 15 is exported respectively to again after first planet mechanism 10 and the second planetary mechanism 11 slow down, described first cutting drum 14 is fixedly connected with the second planetary mechanism 11 with first planet mechanism 10 respectively with the second cutting drum 15, described cutting units housing 1 is by the first cutting drum drive cavity housing 6, the overall structure of transition section shell 3 and the second cutting drum drive cavity housing 2 composition, can ensure that cutting units has enough load bearing stengths and stability like this, described first cutting drum drive cavity housing 6 to be extended to rib side beyond the intermediate channel ledge 27 of drag conveyor 26 and lead-over groove ledge 28 by transition section shell 3 and lower portion bends, first cutting drum drive cavity housing 6 without the need to ride over drag conveyor 26 ledge above, can directly by outside the ledge of drag conveyor 26 to crossheading, the formation at scrapper conveyor frame head and tail place " Triangle Coal " can be avoided, and first cutting drum drive cavity housing 6 lower portion bend, can not only ensure that cutting units has larger coal mouth excessively, and the center to center distance that can reduce between two cutting drums, strengthen the effect of coalingging combining between two cutting drums,
Described transition section shell 3 rear end is provided with top bevel trimming 4 structure and bottom bevel trimming 5 structure, cutting units top bevel trimming 4 operationally can lean against on hydraulic support backplate, thus ensure that the first cutting drum 14 has enough amounts of caunching, bottom bevel trimming 6 can ride on the ledge of drag conveyor 26, thus ensure that the first cutting drum 14 has enough planted agent's amounts, such cutting units has enough amounts of caunching and planted agent measures to adapt to Coal Seam Thickness Change, meet to combine and adopt requirement, the inner chamber flange 19 of described first planet mechanism 10 and the second planetary mechanism 11 is respectively by the inner chamber Flange joint of bolt and the first cutting drum drive cavity housing 6 and the second cutting drum drive cavity housing, the outer face keyway 20 of described first planet mechanism 10 and the second planetary mechanism 11 is located respectively by the outer face keyway of end face flat key 17 and the first cutting drum drive cavity housing 6 and the second cutting drum drive cavity housing 2, the external diameter of planetary mechanism is effectively reduced like this under the condition not changing the planetary mechanism gear number of teeth and modulus, and then the degree of depth of cutting drum blade can be increased, improve effect of loading coal, increase the bonding strength of planetary mechanism and cutting units housing 1, improve efficiency of assembling and interchangeability, and there is more flexibility in manufacturing process, described left cutting units 24 is identical with the structure of right cutting units 25, and relative to middle control cabinet symmetry 21.
The bolt place that the inner chamber flange 19 of described first planet mechanism 10, second planetary mechanism 11 is connected with the first cutting drum drive cavity housing 6, second cutting drum drive cavity housing 2 is provided with gland 18, and gland 18 is pressed on bolt by described straight-tooth transmission system 9.Effectively bolt falling can be prevented like this, without the need to pretension bolt again, coal-winning machine productivity ratio can be can effectively improved when overhauling.
The length sum that the length of described first cutting drum 14 and the first cutting drum drive cavity housing 6 extend to rib side is equal with the length of the second cutting drum 15.The cut degree of depth of two cutting drums is identical, ensure cutting units stability under loading and good coal winning technology, and the second cutting drum 15 is mined without the need to planted agent, enough large shovel spacing need not be ensured, second cutting drum 15 is less with the distance of drag conveyor, not only make the second cutting drum 15 have good load bearing stength, and can also effect of loading coal be improved.
The direction of rotation of described first cutting drum 14 and the second cutting drum 15 is contrary, and rotating speed is identical, and the blade screw direction of described first cutting drum 14 and the second cutting drum 15 is contrary.Two cutting drums work composition two-screw conveyer on a coal-face simultaneously, increase helical blade total amount and floor area ratio, thus greatly reduce float coal amount, play gear coal and combined reinforced effect of coalingging, improve utilization rate and the application life of cutting drum pick simultaneously, optimize cutting units overall performance, ensure the stability of coal-winning machine complete machine.
Also comprise the first internal spraying system 12, second internal spraying system 13 and external spraying system 16, described first internal spraying system 12 and the second internal spraying system 13 are separately positioned in first planet mechanism 10 and the second planetary mechanism 11, the water channel of described first internal spraying system 12, second internal spraying system 13 and external spraying system 16 is all laid on cutting units housing 1, described first cutting drum 14, second cutting drum 15 with cutting units housing 1 is arranged respectively the nozzle be connected with external spraying system 16 with the first internal spraying system 12, second internal spraying system 13.The water channel of press water respectively on cutting units housing 1 flows into, and the nozzle ejection respectively on the first cutting drum 14, second cutting drum 15 and cutting units housing 1, replace the structure of original external rubber hose, the area coverage of water channel is large, the water yield is many and safe and reliable, not easily leak, minimizing accident occurs and the maintenance and repair time, thus more effectively cools transmission system and fire extinguishing depositing dust.
Described first planet mechanism is identical with the component of the second planetary mechanism.Like this installation and maintenance can be convenient to.
Claims (5)
1. a girdle clear end formula flitting, comprise middle control cabinet (21), left tractive unit (22), right tractive unit (23), left cutting units (24) and right cutting units (25), described left tractive unit (22) and right tractive unit (23) are connected to the both sides of middle control cabinet (21), described left cutting units (24), right cutting units (25) is respectively by engaging lug and left tractive unit (22), right tractive unit (23) connects, described right cutting units (25) comprises right cutting units housing (1), cutting motor (7), clutch (8), straight-tooth transmission system (9), first cutting drum (14), second cutting drum (15),
Described cutting motor (7), clutch (8) and straight-tooth transmission system (9) are all arranged in the inner chamber of cutting units housing (1), and the power that cutting motor (7) exports reaches straight-tooth transmission system (9) by clutch (8), first planet mechanism (10) and the second planetary mechanism (11) is reached respectively after straight-tooth transmission system (9) slows down shunting, the first cutting drum (14) and the second cutting drum (15) is exported respectively to again after first planet mechanism (10) and the second planetary mechanism (11) slow down, it is characterized in that,
The overall structure that described cutting units housing (1) is made up of the first cutting drum drive cavity housing (6), transition section shell (3) and the second cutting drum drive cavity housing (2), described first cutting drum drive cavity housing (6) to be extended to rib side beyond the intermediate channel ledge (27) of drag conveyor (26) and lead-over groove ledge (28) by transition section shell (3) and lower portion bends, and described transition section shell (3) rear end is provided with top bevel trimming (4) structure and bottom bevel trimming (5) structure;
The inner chamber flange (19) of described first planet mechanism (10) and the second planetary mechanism (11) is respectively by the inner chamber Flange joint of bolt and the first cutting drum drive cavity housing (6) and the second cutting drum drive cavity housing, and the outer face keyway (20) of described first planet mechanism (10) and the second planetary mechanism (11) is located respectively by the outer face keyway of end face flat key (17) with the first cutting drum drive cavity housing (6) and the second cutting drum drive cavity housing (2);
Described left cutting units (24) is identical with the structure of right cutting units (25), and relative to middle control cabinet symmetry (21).
2. formula flitting of a kind of girdle clear end according to claim 1, it is characterized in that, the bolt place that the inner chamber flange (19) of described first planet mechanism (10), the second planetary mechanism (11) is connected with the first cutting drum drive cavity housing (6), the second cutting drum drive cavity housing (2) is provided with gland (18), and gland (18) is pressed on bolt by described straight-tooth transmission system (9).
3. formula flitting of a kind of girdle clear end according to claim 1, it is characterized in that, the length sum that the length of described first cutting drum (14) and the first cutting drum drive cavity housing (6) extend to rib side is equal with the length of the second cutting drum (15).
4. the formula flitting of a kind of girdle clear end according to any one of claims 1 to 3, it is characterized in that, the direction of rotation of described first cutting drum (14) and the second cutting drum (15) is contrary, rotating speed is identical, and the blade screw direction of described first cutting drum (14) and the second cutting drum (15) is contrary.
5. the formula flitting of a kind of girdle clear end according to any one of claims 1 to 3, it is characterized in that, also comprise the first internal spraying system (12), second internal spraying system (13) and external spraying system (16), described first internal spraying system (12) and the second internal spraying system (13) are separately positioned in first planet mechanism (10) and the second planetary mechanism (11), described first internal spraying system (12), the water channel of the second internal spraying system (13) and external spraying system (16) is all laid on cutting units housing (1), described first cutting drum (14), second cutting drum (15) and cutting units housing (1) are arranged and the first internal spraying system (12) respectively, the nozzle that second internal spraying system (13) is connected with external spraying system (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860386.9U CN204571983U (en) | 2014-12-30 | 2014-12-30 | Girdle clear end formula flitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860386.9U CN204571983U (en) | 2014-12-30 | 2014-12-30 | Girdle clear end formula flitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204571983U true CN204571983U (en) | 2015-08-19 |
Family
ID=53864637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420860386.9U Expired - Fee Related CN204571983U (en) | 2014-12-30 | 2014-12-30 | Girdle clear end formula flitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204571983U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594892A (en) * | 2014-12-30 | 2015-05-06 | 江苏中机矿山设备有限公司 | Bottom cleaning drum shearer for thin coal seams |
| CN107905783A (en) * | 2017-12-05 | 2018-04-13 | 山东科技大学 | A kind of winning machine cutting part with differential separation barrel |
| CN108952705A (en) * | 2018-08-24 | 2018-12-07 | 江苏中机矿山设备有限公司 | A kind of hard girdle lump coal coalcutter and coal-mining method |
-
2014
- 2014-12-30 CN CN201420860386.9U patent/CN204571983U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594892A (en) * | 2014-12-30 | 2015-05-06 | 江苏中机矿山设备有限公司 | Bottom cleaning drum shearer for thin coal seams |
| CN104594892B (en) * | 2014-12-30 | 2018-02-16 | 江苏中机矿山设备有限公司 | A kind of clear bottom formula flitting of girdle |
| CN107905783A (en) * | 2017-12-05 | 2018-04-13 | 山东科技大学 | A kind of winning machine cutting part with differential separation barrel |
| CN107905783B (en) * | 2017-12-05 | 2023-08-18 | 山东科技大学 | Coal cutter cutting part with differential separation roller |
| CN108952705A (en) * | 2018-08-24 | 2018-12-07 | 江苏中机矿山设备有限公司 | A kind of hard girdle lump coal coalcutter and coal-mining method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201080824Y (en) | Thin coal bed cutter side arm type cutting means | |
| CN106761751B (en) | A kind of multiple degrees of freedom Rocker coal mining machine and its method | |
| CN204571983U (en) | Girdle clear end formula flitting | |
| CN204002828U (en) | Saw blade cutting type and breaker combined type development machine | |
| CN104594893A (en) | Cutting part of bottom cleaning drum shearer for thin coal seams | |
| CN106437701B (en) | A kind of anti-wall caving coalcutter | |
| CN201747367U (en) | Opencut coal mine coal mining and stripping machine with adjustable roller height | |
| CN203476332U (en) | Crawler type coal mining machine | |
| CN103742135A (en) | Rapid rectangular full-face tunnel boring machine for mining | |
| CN109519183A (en) | A kind of primary and secondary shield machine | |
| CN204571981U (en) | Girdle clear end formula flitting cutting units | |
| CN104594892A (en) | Bottom cleaning drum shearer for thin coal seams | |
| CN208816115U (en) | A kind of winning machine cutting part of umbrella tooth transmission inclination coal wall side arrangement | |
| CN204571982U (en) | Formula flitting of the clear end | |
| CN201661296U (en) | C-shaped coal mining machine cutting part | |
| CN208996727U (en) | Double-ended shearer for large-mining-height working surface | |
| CN201771493U (en) | Double-knife coal cutter | |
| CN204571985U (en) | Formula flitting cutting units of the clear end | |
| CN206468352U (en) | A kind of multiple degrees of freedom Rocker coal mining machine | |
| CN104948180A (en) | Chained cutting part of mine shearer | |
| CN104594894A (en) | Bottom-clearing drum shearer | |
| CN104594895B (en) | A kind of clear bottom formula flitting cutting units | |
| CN202594287U (en) | Pin header | |
| CN209483352U (en) | Primary and secondary shield machine | |
| CN208869923U (en) | Milling machine cutting units |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20151230 |
|
| EXPY | Termination of patent right or utility model |