CN103418461B - Rotary wheel mill - Google Patents
Rotary wheel mill Download PDFInfo
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- CN103418461B CN103418461B CN201310271437.4A CN201310271437A CN103418461B CN 103418461 B CN103418461 B CN 103418461B CN 201310271437 A CN201310271437 A CN 201310271437A CN 103418461 B CN103418461 B CN 103418461B
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- thrust bearing
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- wheel
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- 238000003825 pressing Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003801 milling Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 2
- 238000000227 grinding Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 241001504664 Crossocheilus latius Species 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241001212149 Cathetus Species 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 208000004141 microcephaly Diseases 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A rotary wheel mill belongs to material milling and processing equipment and adopts the structure that a main transmission shaft (19) is provided with a key or an external spline; a key slot or an internal spline is arranged in a center hole in a main slide block (5); the main transmission shaft (19) is in sliding fit with the center hole in the main slide block (5); a horizontal axle (9) on a roller wheel is radially fixed on the main slide block (5); a support (3) is arranged on a milling plate (13); a straight-line reciprocating mechanism (2) is fixed on the support (3); a movement piece of the straight-line reciprocating mechanism (2) faces to the main slide block (5); one side of a thrust bearing (4) is connected to the top end surface of the main slide block (5), and the other side of the thrust bearing (4) is connected to the movement piece of the straight-line reciprocating mechanism (2). The rotary wheel mill is simple in structure, light in complete machine weight, small in size, low in manufacturing cost, convenient to install and use, large in pressure of the roller wheel, wide in material application range and high in processing efficiency.
Description
Technical field
The present invention relates to a kind of rotary wheel mill, belong to crushing material process equipment, relate in particular to a kind of rotary wheel mill can pressurizeed to muller.
Background technology
The mill disc of rotary wheel mill is fixed and two or more muller revolves round the sun around main shaft on mill disc, muller does rotation around respective trunnion axis under the effect of material frictional force simultaneously, material on mill disc is pulverized, broken and processing in small, broken bits in being generally used for carrying out material by muller.But for this edge runner, the weight of muller and be relatively-stationary to the grinding pressure of material, muller must do larger, just can have enough grinding pressures, so, transport, assembling are all inconvenient, manufacturing cost also rises, and in use muller can grind less and less, the deadweight of muller can be more and more lighter, the later stage to material grinding efficiency can reduce.Chinese patent notification number: CN 201385380, the day for announcing: on January 20th, 2010, utility model title " a kind of hydraulic wheel-milling mixing machine " comprises frame, be arranged on the barrel that central rack is driven by power set, barrel chassis is mill disc, frame has frame upper mounting plate, muller is arranged with in barrel below frame upper mounting plate, muller has muller axle, muller axle is provided with muller frame, and muller top of the trellis is connected with the piston end of the muller hydraulic jack be arranged on frame upper mounting plate; Guide post is provided with between the muller frame and frame upper mounting plate of the piston end both sides of muller hydraulic jack, compared with traditional disc-rotation type edge runner, size and the weight of muller can be reduced, thus reduce the weight of edge runner, volume and manufacturing cost on the whole, the compaction of large muller edge runner can be reached equally.But each muller will configure a set of muller hydraulic jack to increase the wheel pressure of muller in this utility model, asynchronous or the installation difference that each muller hydraulic jack runs all can make easily to produce wheel load non-uniform phenomenon between each muller, run steady not, thus reduce the efficiency of milling and increase the power attenuation that mill disc runs, be unsuitable for using in rotary wheel mill.
Summary of the invention
The object of the invention is to overcome existing rotary wheel mill weight, volume is large, manufacturing cost is high, and the wheel pressure of muller can not regulate, the defect that grinding efficiency is lower and deficiency, the rotary wheel mill that a kind of wheel pressure of muller can regulate is provided, its volume is little, lightweight, and manufacturing cost is lower, structure is simple, each muller wheel pressure uniform, operate steadily, grinding efficiency is higher.
For achieving the above object, the technical solution used in the present invention is: a kind of rotary wheel mill, comprise muller, mill disc, final drive shaft and power set, the lower end connecting power device of final drive shaft, the upper end of final drive shaft is connected with the horizontal wheel shaft on muller, described final drive shaft is provided with key or external splines, in centre bore on described master slider, corresponding final drive shaft is provided with keyway or internal spline, centre bore on final drive shaft and master slider is slidably matched, horizontal wheels Axial and radial on described muller is fixed on master slider, described mill disc is provided with a support, centre bore on described support on corresponding master slider is fixed with a linear reciprocating mechanism, the movement parts of described linear reciprocating mechanism is towards master slider, a thrust bearing side is had to be connected with the top end face of master slider, opposite side is connected with the movement parts of described linear reciprocating mechanism.
Described thrust bearing is plain thrust bearing or radial thrust bearing, on described master slider upper surface, the seat sheet of corresponding thrust bearing is provided with bearing mounting hole, and the axle sheet in the movement parts of described linear reciprocating mechanism on corresponding thrust bearing is provided with connecting mandrel.
Described muller comprises wear-resisting collars, horizontal wheel shaft and wheel body, and wear-resisting collars is nested on the radially-outer surface of wheel body, and the center of wheel body arranges wheel bore, and wheel bore and horizontal wheel shaft are slidably matched.
Be provided with baffle plate flange above the neighboring of described mill disc, the baffle plate flange of the corresponding mill disc neighboring of described support makes the closed cover body of flanged dish, and described cover body is fixedly connected with baffle plate flange, and described cover body is provided with charging hole.
The sidewall of described baffle plate flange makes up big and down small circular cone annular along mill disc neighboring, on baffle plate flange sidewalls, the upper plane of corresponding mill disc is provided with screen pack.
Described linear reciprocating mechanism is down pressing oil cylinder or cylinder, the cylinder body of described down pressing oil cylinder or cylinder is fixed on the support above final drive shaft, the telescopic end of described down pressing oil cylinder or cylinder points to master slider, described down pressing oil cylinder is connected with secondary Hydraulic Station through pipeline, or be connected with the hydraulic system on power set, or described lower air cylinder is connected with pneumatic system through pipeline, the side of thrust bearing is connected with the top end face of master slider, and opposite side is connected with the telescopic end of described down pressing oil cylinder or cylinder.
Described linear reciprocating mechanism is feed screw nut's motion, described nut is fixed on the support above final drive shaft, master slider is pointed in one end of described screw mandrel, seat sheet on described thrust bearing is connected with the end face at master slider top, and the axle sheet on thrust bearing is connected with the mandrel of described screw mandrel one end.
Described linear reciprocating mechanism is rack pinion motion, described tooth bar seat and pinion stand are fixed on the support above final drive shaft, master slider is pointed in one end of described tooth bar, seat sheet on described thrust bearing is connected with the top end face of master slider, and the axle sheet on thrust bearing is connected with the mandrel of described tooth bar one end.
Compared with prior art, beneficial effect of the present invention is: 1. master slider is changed into can be connected in axial sliding with being fixedly connected with of final drive shaft, and adopt linear reciprocating mechanism to apply downforce to master slider, and then increase the wheel pressure of muller, to improve the stone roller powder efficiency of rotary wheel mill, the muller making weight less can pulverize granularity and the larger ore of proportion; 2. the downforce of cathetus reciprocating mechanism of the present invention can adjust within the specific limits, and master slider is to each muller wheel pressure uniform, and muller wheel pressure can be changed in relative broad range, the type adapting to ore increases, the fineness of grinding powder improves, and has widened the rotary wheel mill scope of application; 3. the present invention can reduce diameter and the weight of muller in rotary wheel mill, even if muller diameter mill is little, the deadweight of muller is more and more lighter, to material grinding efficiency also unaffected, the service life of muller improves relatively, the weight and volume of whole edge runner all can reduce, and cost of manufacture reduces, and the stone roller powder working (machining) efficiency of edge runner is high; 4. the present invention is provided with screen pack on baffle plate flange, powder is discharged by washing, the needs of different operating mode during materiel machining can be met, and above mill disc, be provided with support or outer cover, improve the bulk strength of edge runner, to preventing muller fragmentation and deviating to have good protective effect, add the security in rotary wheel mill running; 5. structure of the present invention is simple, and complete machine is lightweight, and volume is little, and cost of manufacture is low, easy to install, and muller pressure is large, and material wide accommodation, working (machining) efficiency is high.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of structure of the present invention.
Fig. 2 is the top view of Fig. 1.
In figure: secondary Hydraulic Station 1, linear reciprocating mechanism 2, support 3, thrust bearing 4, master slider 5, baffle plate flange 6, wear-resisting collars 7, alignment pin 8, horizontal wheel shaft 9, wheel body 10, screen pack 11, material 12, mill disc 13, power set 14, main control valve block 15, mair motor 16, hydraulic pump 17, fuel tank 18, final drive shaft 19.
Detailed description of the invention
Illustrate that the present invention will be further described with detailed description of the invention below in conjunction with accompanying drawing, but the restriction not to its protection domain.
See Fig. 1, Fig. 2, a kind of rotary wheel mill of the present invention, comprise muller, mill disc 13, final drive shaft 19 and power set 14, the lower end connecting power device 14 of final drive shaft 19, the upper end of final drive shaft 19 is connected with the horizontal wheel shaft 9 on muller, described final drive shaft 19 is provided with key or external splines, in centre bore on described master slider 5, corresponding final drive shaft 19 is provided with keyway or internal spline, final drive shaft 19 is slidably matched with the centre bore on master slider 5, namely master slider 5 can sliding axially along final drive shaft 19, when final drive shaft 19 rotates, under the drive of keyway or internal spline, master slider 5 also rotates with final drive shaft 19, horizontal wheel shaft 9 radial direction on described muller is fixed on master slider 5, described mill disc 13 is provided with a support 3, centre bore on described support 3 on corresponding master slider 5 is fixed with a linear reciprocating mechanism 2, the movement parts of described linear reciprocating mechanism 2 is towards master slider 5, thrust bearing 4 side is had to be connected with the top end face of master slider 5, opposite side is connected with the movement parts of described linear reciprocating mechanism 2.
Described muller comprises wear-resisting collars 7, horizontal wheel shaft 9 and wheel body 10, wear-resisting collars 7 is nested on the radially-outer surface of wheel body 10, the setting of wear-resisting collars 7 is stone roller powder efficiency in order to improve wheel body 10 and service life, for ensureing that wear-resisting collars 7 is combined firmly and run-in synchronism with wheel body 10, can also hole between wear-resisting collars 7 and the faying face of wheel body 10 and alignment pin 8 is installed, the center of wheel body 10 arranges wheel bore, wheel bore and horizontal wheel shaft 9 are slidably matched, and namely wheel body 10 can rotate around horizontal wheel shaft 9.The other end radial direction of horizontal wheel shaft 9 is fixed on master slider 5.In Fig. 2, described muller has three, and they are arranged symmetrically with along the radial central axis of master slider 5.The quantity of described muller also can be two or four.When final drive shaft 19 rotates, at master slider 5 with under the drive of horizontal wheel shaft 9, muller rolls the material 12 be placed in mill disc 13 plane and pulverizes processing.
In Fig. 1, baffle plate flange 6 is provided with above the neighboring of described mill disc 13, described baffle plate flange 6 is fixed on the annular tube wall above mill disc 13 outer, and be horizontally disposed with flange face outside the upper end of annular tube wall, so that the cover above mounting bracket 3 or muller.Described support 3 also the baffle plate flange 6 of corresponding mill disc 13 neighboring can make the closed cover body of flanged dish, and described cover body is fixedly connected with baffle plate flange 6, and described cover body is provided with charging hole, so that drop into material 12 from the top of baffle plate flange 6.
The sidewall of described baffle plate flange 6 can also be made up big and down small circular cone annular along mill disc 13 neighboring, on baffle plate flange 6 sidewall, the upper plane of corresponding mill disc 13 is provided with screen pack 11, so that wash away the powder pulverized with water, powder is flowed out from screen pack 11.
In Fig. 1, described master slider 5 comprises a step disk-like accessory, has centre bore at the center of disk-like accessory, step disk-like accessory head-up little, on microcephaly, cover has a pipe, and the end face on pipe top is provided with the installation position of thrust bearing 4, to install thrust bearing 4, form master slider 5.Master slider 5 also directly can make the disk-like accessory that a center has through hole, but the thickness of this disk-like accessory should meet master slider 5 when sliding axially along final drive shaft 19, and final drive shaft 19 can not push up the thrust bearing 4 on master slider 5 upper surface.
Described thrust bearing 4 is plain thrust bearing or radial thrust bearing, for the axis of movement decentraction of the axis and linear reciprocating mechanism 2 of avoiding final drive shaft 19, preferably adopt radial thrust bearing, it is main axle, united load that this class bearing can bear axial load.On usual described master slider 5 upper surface, the seat sheet of corresponding thrust bearing 4 is provided with bearing mounting hole, and the axle sheet in the movement parts of described linear reciprocating mechanism 2 on corresponding thrust bearing 4 is provided with connecting mandrel.Namely the seat sheet of thrust bearing 4 is arranged on master slider 5, and the axle sheet of thrust bearing 4 is arranged in the movement parts of linear reciprocating mechanism 2.Certainly, also can oppositely install as required.
In Fig. 1, described linear reciprocating mechanism 2 is down pressing oil cylinder, the cylinder body of described down pressing oil cylinder is fixed on the support 3 above final drive shaft 19, the expansion link of down pressing oil cylinder preferably and the axis coaxle of final drive shaft 19, the telescopic end of described down pressing oil cylinder points to master slider 5, described down pressing oil cylinder is connected with secondary Hydraulic Station 1 through pipeline, arranging separately secondary Hydraulic Station can avoid hydraulic system when being communicated with hydraulic system on power set 4 to the pressure disturbances of down pressing oil cylinder, certainly some disturb little or can exclusive PCR, down pressing oil cylinder also can be connected with the hydraulic system on power set 14, the side of thrust bearing 4 is connected with the top end face of master slider 5, opposite side is connected with the telescopic end of described down pressing oil cylinder.Described power set 14 are hydraulic motor, and hydraulic motor is connected with hydraulic system, and described hydraulic system is by main control valve block 15, mair motor 16, hydraulic pump 17 and fuel tank 18 form, and provide hydraulic power to power set 14 i.e. hydraulic motor, control and drive hydraulic motor to rotate.Certainly, power set 14 also can adopt motor and speed reducer to drive.Final drive shaft 19 is driven to rotate at power set 14, and while driving master slider 5 and muller to rotate, secondary Hydraulic Station 1 can drive the downward action of the telescopic end of down pressing oil cylinder, downforce is applied to master slider 5 by thrust bearing 4, and by horizontal wheel shaft 9 by downforce stepless action on each muller, thus improve the wheel pressure of each muller to material on mill disc 13, reach the rolling effect that heavy muller just can reach.
Described linear reciprocating mechanism 2 also can for pressing down cylinder, the cylinder body of described lower air cylinder is fixed on the support 3 above final drive shaft 19, the expansion link of lower air cylinder as far as possible with the axis coaxle of final drive shaft 19, the telescopic end of described lower air cylinder points to master slider 5, described lower air cylinder is connected with secondary pneumatic system through pipeline, or be connected with the baric systerm on power set 14, the side of thrust bearing 4 is connected with the top end face of master slider 5, and opposite side is connected with the telescopic end of described lower air cylinder.
Described linear reciprocating mechanism 2 can also be feed screw nut's motion, described nut is fixed on the support 3 above final drive shaft 19, the axis of nut and screw mandrel as far as possible with the axis coaxle of final drive shaft 19, nut is meshed with screw mandrel, motor and reductor is adopted to drive screw mandrel to rotate, and the mode accomplish linear making screw mandrel move linearly moves back and forth, master slider 5 is pointed in one end of described screw mandrel, and the mandrel that can match with thrust bearing 4 axle sheet upper shaft hole is shaped with in end, seat sheet on described thrust bearing 4 is connected with the end face at master slider 5 top, axle sheet on thrust bearing 4 is connected with the mandrel of described screw mandrel one end.
Described linear reciprocating mechanism 2 can also be rack pinion motion, described wheel and rack is meshed, tooth bar slides along tooth bar seat, gear shaft on gear is fixed on pinion stand, described tooth bar seat and pinion stand are fixed on the support 3 above final drive shaft 19, the axis of tooth bar is tried one's best and the axis coaxle with final drive shaft 19, motor and reductor driven gear is adopted to rotate, and the mode accomplish linear of rack linear movement is moved back and forth, master slider 5 is pointed in one end of described tooth bar, and the mandrel that can match with thrust bearing 4 axle sheet upper shaft hole is shaped with in end, seat sheet on described thrust bearing 4 is connected with the top end face of master slider 5, axle sheet on thrust bearing 4 is connected with the mandrel of described tooth bar one end.
Claims (7)
1. a rotary wheel mill, comprise muller, mill disc (13), final drive shaft (19) and power set (14), the lower end connecting power device (14) of final drive shaft (19), the upper end of final drive shaft (19) is connected with the horizontal wheel shaft (9) on muller, it is characterized in that: described final drive shaft (19) is provided with key or external splines, in centre bore on master slider (5), corresponding final drive shaft (19) is provided with keyway or internal spline, final drive shaft (19) is slidably matched with the centre bore on master slider (5), horizontal wheel shaft (9) radial direction on described muller is fixed on master slider (5), described mill disc (13) is provided with a support (3), centre bore on the upper corresponding master slider (5) of described support (3) is fixed with a linear reciprocating mechanism (2), the movement parts of described linear reciprocating mechanism (2) is towards master slider (5), a thrust bearing (4) side is had to be connected with the top end face of master slider (5), opposite side is connected with the movement parts of described linear reciprocating mechanism (2), described thrust bearing (4) is plain thrust bearing or radial thrust bearing, on described master slider (5) upper surface, the seat sheet of corresponding thrust bearing (4) is provided with bearing mounting hole, axle sheet in the movement parts of described linear reciprocating mechanism (2) on corresponding thrust bearing (4) is provided with connecting mandrel.
2. a kind of rotary wheel mill according to claim 1, it is characterized in that: described muller comprises wear-resisting collars (7), horizontal wheel shaft (9) and wheel body (10), wear-resisting collars (7) is nested on the radially-outer surface of wheel body (10), the center of wheel body (10) arranges wheel bore, and wheel bore and horizontal wheel shaft (9) are slidably matched.
3. a kind of rotary wheel mill according to claim 1, it is characterized in that: above the neighboring of described mill disc (13), be provided with baffle plate flange (6), the baffle plate flange (6) of described support (3) corresponding mill disc (13) neighboring makes the closed cover body of flanged dish, described cover body is fixedly connected with baffle plate flange (6), and described cover body is provided with charging hole.
4. a kind of rotary wheel mill according to claim 3, it is characterized in that: the sidewall of described baffle plate flange (6) makes up big and down small circular cone annular along mill disc (13) neighboring, on baffle plate flange (6) sidewall, the upper plane of corresponding mill disc (13) is provided with screen pack (11).
5. a kind of rotary wheel mill according to claim 1, it is characterized in that: described linear reciprocating mechanism (2) is down pressing oil cylinder or cylinder, the cylinder body of described down pressing oil cylinder or cylinder is fixed on the support (3) of final drive shaft (19) top, the telescopic end of described down pressing oil cylinder or cylinder points to master slider (5), described down pressing oil cylinder is connected with secondary Hydraulic Station (1) through pipeline, or be connected with the hydraulic system on power set (14), or described lower air cylinder is connected with pneumatic system through pipeline, the side of thrust bearing (4) is connected with the top end face of master slider (5), opposite side is connected with the telescopic end of described down pressing oil cylinder or cylinder.
6. a kind of rotary wheel mill according to claim 1, it is characterized in that: described linear reciprocating mechanism (2) is feed screw nut's motion, described nut is fixed on the support (3) of final drive shaft (19) top, master slider (5) is pointed in one end of described screw mandrel, seat sheet on described thrust bearing (4) is connected with the end face at master slider (5) top, and the axle sheet on thrust bearing (4) is connected with the mandrel of described screw mandrel one end.
7. a kind of rotary wheel mill according to claim 1, it is characterized in that: described linear reciprocating mechanism (2) is rack pinion motion, the tooth bar seat of described rack pinion motion and pinion stand are fixed on the support (3) of final drive shaft (19) top, master slider (5) is pointed in one end of described tooth bar, seat sheet on described thrust bearing (4) is connected with the top end face of master slider (5), and the axle sheet on thrust bearing (4) is connected with the mandrel of described tooth bar one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310271437.4A CN103418461B (en) | 2013-07-01 | 2013-07-01 | Rotary wheel mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310271437.4A CN103418461B (en) | 2013-07-01 | 2013-07-01 | Rotary wheel mill |
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| Publication Number | Publication Date |
|---|---|
| CN103418461A CN103418461A (en) | 2013-12-04 |
| CN103418461B true CN103418461B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310271437.4A Active CN103418461B (en) | 2013-07-01 | 2013-07-01 | Rotary wheel mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS269790B1 (en) * | 1985-12-31 | 1990-05-14 | Wolfgang Teuscher | Device for pan mill's edge runners clamping and lifting in blungers |
| CN2262948Y (en) * | 1996-04-10 | 1997-09-24 | 龙口太行颜料有限公司 | Mill with roller |
| US5895000A (en) * | 1996-11-13 | 1999-04-20 | Trim Co., Ltd. | Glass crushing machine and glass crushing system using the same |
| CN2342888Y (en) * | 1998-10-30 | 1999-10-13 | 山西京晋环保实业投资开发有限公司 | Pressure wheel mill |
| CN102476067A (en) * | 2010-11-19 | 2012-05-30 | 陈春风 | Loading-type vibrating edge runner mill |
| CN203417724U (en) * | 2013-07-01 | 2014-02-05 | 张元杰 | Rotary edge runner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5344127Y2 (en) * | 1975-09-04 | 1978-10-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS269790B1 (en) * | 1985-12-31 | 1990-05-14 | Wolfgang Teuscher | Device for pan mill's edge runners clamping and lifting in blungers |
| CN2262948Y (en) * | 1996-04-10 | 1997-09-24 | 龙口太行颜料有限公司 | Mill with roller |
| US5895000A (en) * | 1996-11-13 | 1999-04-20 | Trim Co., Ltd. | Glass crushing machine and glass crushing system using the same |
| CN2342888Y (en) * | 1998-10-30 | 1999-10-13 | 山西京晋环保实业投资开发有限公司 | Pressure wheel mill |
| CN102476067A (en) * | 2010-11-19 | 2012-05-30 | 陈春风 | Loading-type vibrating edge runner mill |
| CN203417724U (en) * | 2013-07-01 | 2014-02-05 | 张元杰 | Rotary edge runner |
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| Publication number | Publication date |
|---|---|
| CN103418461A (en) | 2013-12-04 |
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