CN201089639Y - Complementary duplex bearing supporting roller of belt conveyer - Google Patents
Complementary duplex bearing supporting roller of belt conveyer Download PDFInfo
- Publication number
- CN201089639Y CN201089639Y CNU2007201767764U CN200720176776U CN201089639Y CN 201089639 Y CN201089639 Y CN 201089639Y CN U2007201767764 U CNU2007201767764 U CN U2007201767764U CN 200720176776 U CN200720176776 U CN 200720176776U CN 201089639 Y CN201089639 Y CN 201089639Y
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- Prior art keywords
- bearing
- ball
- roller
- labyrinth
- casing
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- Expired - Fee Related
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- 230000000295 complement effect Effects 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000004698 Polyethylene Substances 0.000 claims abstract description 8
- -1 polyethylene Polymers 0.000 claims abstract description 7
- 229920000573 polyethylene Polymers 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims description 18
- 238000012856 packing Methods 0.000 claims description 15
- 230000007717 exclusion Effects 0.000 claims description 12
- 238000010622 cold drawing Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000000428 dust Substances 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 7
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Rolling Contact Bearings (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
Abstract
The utility model discloses a complementary double-bearing carrier roller for belt conveyors, comprising a carrier roller shaft, a sliding bearing made from ultrahigh molecular polyethylene modified material, a sliding bearing block which supports the sliding bearing and is molded through cold stretch, a drum and a sealing structure which are arranged outside the carrier roller shaft. Meanwhile, the utility model also comprises a ball bearing. The ball bearing and the sliding bearing are adjacent to each other and are sleeved on the carrier roller shaft; the sealing structure is arranged at the outer ends of the ball bearing and the sliding bearing; the outer end of the sealing structure is provided with an outer retainer ring. The utility model adopts the ball bearing and sliding bearing structure having complementary performance, thereby reducing the locking phenomena caused by the excessive wear of the ball bearing and improving the life span of the carrier roller shaft; meanwhile, as the sealing structure with good dust prevention is adopted, a dustless work environment of the carrier roller shaft is established; the duplex type carrier roller drum improves the operation performance of the carrier roller, and simultaneously simplifies the requirements and needs of equipment for daily maintenance and repair.
Description
Technical field
The utility model relates to a kind of improvement of belt load transfer device middle idler roller structure, particularly a kind of carrying roller with duplex bearing.Belong to mechanical drive.
Background technology
Known carrying roller is in the large band conveyer structure, adopted in a large number, more damageable again parts, reinforcement by routine or improve original dustproof, lubricate and the friction structure, though help the improvement of overall work effect, but produce little effect, and be subjected to the restriction of environment for use and the concrete service conditions of occasion, cause the design performance of its new product to be difficult to keep, dustproof construction is destroyed rapidly, bearing and carrying roller sharply wear and tear, the ball-bearing casing gap is strengthened, and the easy sideslip of belt easily has an accident, even ball-bearing casing produces locking phenomenon, belt accelerated wear test energy consumption must often be changed carrying roller, has improved use cost.
The utility model name is called " the novel carrying roller of band conveyor ", the patent No. is the Chinese patent of ZL200620119221.1, the patent of declaring in 2006 for the inventor, this utility model discloses the sleeve pipe of a kind of no cunning dynamic bearing structure of selecting for use material modified with ultrahigh molecular weight polyethylene to make (it is longer service life therefore to plant the material plain bearing, and can bear certain fluctuating load), the making of roller outsourcing super high molecular weight modified polyethylene material.Though this utility model has obtained good effect, also there is the big problem of sliding bearing abrasion, through contriver's further research, test, improve and optimizate and designed a kind of even more ideal idler structure.
The utility model content
In order to overcome defective of the prior art, the utility model provides a kind of can make the ball-bearing casing anti-lock, makes carrying roller have the small rotation resistance for a long time, long life, the characteristic of few maintenance and high-mechanic is difficult to keep the deficiency that service life is short to overcome existing carrying roller performance.
To achieve these goals, the technical solution of the utility model is achieved in that the complementary duplex bearing carrying roller of a kind of band conveyor, comprise roller carrier shaft, the material modified plain bearing of ultra high molecular polyethylene, support the cold drawing moulding of plain bearing plain bearing housing, be arranged on the roller and the hermetically-sealed construction of roller carrier shaft outside, also comprise ball-bearing casing in addition, described ball-bearing casing and plain bearing are adjacent to be enclosed within on the roller carrier shaft, and described hermetically-sealed construction is arranged between the outer end bearing seat and roller carrier shaft of ball-bearing casing and plain bearing.
As preferably, the periphery of described ball-bearing casing and plain bearing is provided with the bearing seat of cold drawing moulding, the end weld together of described bearing seat and roller.
As preferably, described hermetically-sealed construction is a labyrinth exclusion seal pair, described labyrinth exclusion seal secondary with roller carrier shaft and bearing seat interference fit, described labyrinth exclusion seal pair comprises that labyrinth dynamic seal and labyrinth decide sealing member, described labyrinth dynamic seal and labyrinth are decided sealing member and are combined together.
As preferably, described hermetically-sealed construction also comprises a pair of dustproof words sealing pair, described dustproof words sealing pair is arranged on the outer end of described labyrinth exclusion seal pair, described dustproof words sealing pair and roller carrier shaft and bearing seat interference fit, described dustproof words sealing pair comprises lip formula rubber seal and outer gland sealing moving-coil two parts, described two parts closely cooperate together, and the outer end of dustproof words sealing pair is provided with outer back-up ring.
Described ball-bearing casing is a deep groove ball bearing.
As preferably, the outside of described roller is provided with the roller sleeve pipe of super high molecular weight modified polyethylene material.
Described plain bearing is positioned at the outer end of ball-bearing casing, and plain bearing and hermetically-sealed construction join, and ball-bearing casing oil packing dish is set below the described ball-bearing casing, and the following and bearing seat of described ball-bearing casing oil packing dish joins.
As a further improvement on the present invention, described ball-bearing casing is positioned at the outer end of plain bearing, and described ball-bearing casing and hermetically-sealed construction join, and the following and bearing seat of described plain bearing joins.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model employing plain bearing and ball-bearing casing are shared, play complementary effect, because work as ball-bearing casing between constant failure rate period, because it is very little axially, end-play, make the attrition surface of plain bearing not produce friction, at this moment the plain bearing that is placed on the ball-bearing casing outer end is the dustproof barrier of ball-bearing casing, plain bearing still has the secondary and dustproof words sealing pair twice dust-proof sealing structure of caoutchouc elasticity of labyrinth exclusion seal outward, even there is a spot of dust to enter, may enter in the plain bearing hardly, therefore can be the tolerance clearance between plain bearing and the roller carrier shaft by unique passage of plain bearing, and also be full of the grease of the thickness that overflows in the ball-bearing casing chamber in the tolerance clearance of this point point, so ball-bearing casing is worked in dustfree environment all the time, when ball-bearing casing increases to play because of mechanical wear, its part load just is added on the plain bearing, two bearings are worked simultaneously, the continuation wearing and tearing of ball-bearing casing have just been alleviated, this process can be more much longer than independent use plain bearing, finish up to sliding bearing life, ball-bearing casing can not cause the phenomenon that produces locking because of undue wear yet.
The experiment proved that 2, be to use more than three times of ball-bearing casing separately average length of working life of the present utility model.And the work life of roller carrier shaft is mainly at bearing.Thereby realized prolonging the service life of roller carrier shaft substantially.
3, plain bearing described in the utility model is made for selecting material modified with ultrahigh molecular weight polyethylene for use, plain bearing can be born certain fluctuating load, and be convenient to select for use novel good bearing material as material modified with ultrahigh molecular weight polyethylene as Nonlubricated bearing, oily better off is arranged.Its bearing seat adopts cold rolled thin steel sheet cold punching and drawing forming process to make, and is convenient to produce in enormous quantities.
4, roller sleeve pipe described in the utility model selects for use material modified with ultrahigh molecular weight polyethylene to make, it has good wear resisting property, prolong the service life of roller, and can reduce wearing and tearing to belt, its assembly technology adopts the roller two-port after welding with bearing seat is carried out disposable thermal distortion encapsulation, is convenient to operate on the carrying roller flow production line.
5, the parts of the utility model except said structure and roller carrier shaft all adopt injection mo(u)lding and sheet steel cold drawing molding structure, are convenient to produce in enormous quantities and save material expendable weight.
6, the utility model selected for use have mutual additional properties, help each other the effect ball-bearing casing add sliding bearing structure, the plain bearing that adopts material modified with ultrahigh molecular weight polyethylene to make, set up the dust free working environment of Idler bearing, compound roller has been optimized the integrally-built design of carrying roller.Improved the carrying roller drive ability, and for alleviating the gross weight of equipment amount, adopting new material, new process, reduction over-the-road expense that architecture basics is provided; Simplified the requirement and needs of equipment simultaneously to daily service and maintenance and repair.
Description of drawings
Fig. 1 is positioned at the utility model structure cutaway view of ball-bearing casing outer end for plain bearing.
Fig. 2 is positioned at the utility model structure cutaway view of plain bearing outer end for ball-bearing casing.
The accompanying drawing sign
1-roller carrier shaft 2-roller 3-roller sleeve pipe 4-bearing seat
5-deep groove ball bearing 6-circlip for shaft 7-plain bearing housing
Sealing member is decided in dynamic seal 10-labyrinth, 8-plain bearing 9-labyrinth
The outer back-up ring of 11-outer gland sealing moving-coil 12-lip formula rubber seal 13-
14-axle-steel silk back-up ring 15-plain bearing packing ring 16-ball-bearing casing oil packing dish.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, but not as to qualification of the present utility model.
Embodiment one, is illustrated in figure 1 as the complementary duplex bearing carrying roller of the band conveyor that is used for the power plant, and its overall dimension is 108 * 465 millimeters of Φ, nearly weighs 7.5 kilograms.The complementary duplex bearing carrying roller of described band conveyor comprises roller carrier shaft 1, the material modified plain bearing 8 of ultra high molecular polyethylene, support the plain bearing housing 7 of the cold drawing moulding of plain bearing 8, be arranged on the roller 2 and the hermetically-sealed construction of roller carrier shaft 1 outside, also comprise deep groove ball bearing 5 in addition, described plain bearing 8 is arranged on the outer end of deep groove ball bearing 5 and is enclosed within simultaneously on the roller carrier shaft 1, and the other end of deep groove ball bearing 5 is provided with ball-bearing casing oil packing dish 16.Described hermetically-sealed construction is arranged on the outer end of plain bearing 8, and the outer end of described hermetically-sealed construction is provided with outer back-up ring 13.The periphery of described deep groove ball bearing 5 and plain bearing 8 is provided with the bearing seat 4 of cold drawing moulding, the end weld together of described bearing seat 4 and roller 2.The outside of described roller 2 is provided with the roller sleeve pipe 3 of super high molecular weight modified polyethylene material.
In order to play good sealing effectiveness, described hermetically-sealed construction comprises labyrinth exclusion seal pair, described labyrinth exclusion seal secondary and roller carrier shaft 1 and bearing seat 4 interference fit, described labyrinth exclusion seal pair comprises that labyrinth dynamic seal 9 and labyrinth decide sealing member 10, and described labyrinth dynamic seal 9 and labyrinth are decided sealing member 10 and be combined together.Described hermetically-sealed construction also comprises a pair of dustproof words sealing pair, described dustproof words sealing pair and roller carrier shaft 1 and bearing seat 4 interference fit, described dustproof words sealing pair comprises lip formula rubber seal 12 and outer gland sealing moving-coil 11 two parts, described two parts closely cooperate together, and described outer back-up ring 13 is arranged on the outer end of dustproof words sealing pair.
The installation method of the complementary duplex bearing carrying roller of band conveyor as shown in Figure 1 is as follows: with roller 2 (roller special steel pipe) two ends and two bearing seat 4 usefulness automatic gas shielded welding machines welding through punching stretch forming; put roller sleeve pipe 3 two ends that material modified with ultrahigh molecular weight polyethylene " UHMW-PE " is made then, the thermal deformation encapsulation.The ball-bearing casing oil packing dish 16 of packing in the bearing seat 4 is filled with the high temperature lithium base grease in ball-bearing casing oil packing dish 16.
Deep groove ball bearing 5 is pressed in the bearing seat 4 of roller 2 one ends with carrying roller dedicated hydraulic assembly machine, make roller carrier shaft 1 and deep groove ball bearing 5 inner ring interference fit, load onto circlip for shaft 6 then, sealing member 10, outer gland sealing moving-coil 11, lip formula rubber seal 12, outer back-up ring 13 are decided in pack into successively plain bearing housing 7 and plain bearing 8, labyrinth dynamic seal 9, plain bearing packing ring 15, axle-steel silk back-up ring 14, labyrinth again.The other end of carrying roller is by identical method assembling.
Ball bearing inner race in the present embodiment and roller carrier shaft 1, outer ring and bearing seat 4 interference fit have axle to use trip ring 6 with the ball-bearing casing axial location on the described roller carrier shaft 1.And plain bearing 8 also have axle-steel silk back-up ring 14 and plain bearing packing ring 15 for independently radially, the axial location system.The axial friction gap of whole carrying roller parts radial interference and free-running fit dimension limit and axial location, plain bearing all is through well-designed good.Make fitting process very simple and convenient.More than be this routine keystone configuration.In the erecting stage, the two ends of roller carrier shaft are fixed on the conveyer carrying roller support.
During work, conveyer drives and is with the roller 2 of sleeve pipe, and drives bearing seat 4, ball-bearing casing, plain bearing 8, labyrinth dynamic seal 9, outer gland sealing moving-coil 11 successively together around roller carrier shaft 1 rotation, and carrying roller is realized its carrying Fu task.
Wherein, because the self lubricating abrasion-resistant slide bearing of selecting for use new material to make adds the complementary dual bearing structure of zanjon ball-bearing casing, and has good dustless running environment, make the daily attention of Idler bearing very easy, the lubricating oil of must not annotating again all the life, load-carrying capacity improves greatly, and is durable in use.Only increased very low cost, making its mea life is to use three times of ball-bearing casing separately.
Owing to adopt the sleeve pipe of new material, wear-resisting light weight, actv. protection steel refers to that the steel roller is not subjected to the corrosion of environment, has prolonged single-piece service life.
Embodiment two: as shown in Figure 2, compare with embodiment one, just plain bearing 8 is placed on deep groove ball bearing 5 inboards, dexterously with the axial locating surface of deep groove ball bearing 5 inner rings as plain bearing 8, plain bearing 8 is used as ball-bearing casing sealing food tray, reduce parts such as axle-steel silk back-up ring 14, plain bearing packing ring 15, ball-bearing casing oil packing dish 16 than Fig. 1, strengthened the labyrinth packing space.Save raw MAT'L and tooling cost, also can obtain good effect.
Claims (8)
1. the complementary duplex bearing carrying roller of a band conveyor, comprise the cold drawing moulding of roller carrier shaft, plain bearing, support plain bearing plain bearing housing, be arranged on the roller and the hermetically-sealed construction of roller carrier shaft outside, it is characterized in that, also comprise ball-bearing casing, described ball-bearing casing and plain bearing are adjacent to be enclosed within on the roller carrier shaft, and described hermetically-sealed construction is arranged between the outer end bearing seat and roller carrier shaft of ball-bearing casing and plain bearing.
2. the complementary duplex bearing carrying roller of band conveyor according to claim 1 is characterized in that the periphery of described ball-bearing casing and plain bearing is provided with the bearing seat of cold drawing moulding, the end weld together of described bearing seat and roller.
3. the complementary duplex bearing carrying roller of band conveyor according to claim 2, it is characterized in that, described hermetically-sealed construction is a labyrinth exclusion seal pair, described labyrinth exclusion seal secondary and roller carrier shaft and bearing seat interference fit, described labyrinth exclusion seal pair comprises that labyrinth dynamic seal and labyrinth decide sealing member, and described labyrinth dynamic seal and labyrinth are decided sealing member and be combined together.
4. the complementary duplex bearing carrying roller of band conveyor according to claim 3, it is characterized in that, described hermetically-sealed construction also comprises a pair of dustproof words sealing pair, described dustproof words sealing pair is arranged on the outer end of described labyrinth exclusion seal pair, described dustproof words sealing pair and roller carrier shaft and bearing seat interference fit, described dustproof words sealing pair comprises lip formula rubber seal and outer gland sealing moving-coil two parts, described two parts closely cooperate together, and the outer end of dustproof words sealing pair is provided with outer back-up ring.
5. the complementary duplex bearing carrying roller of band conveyor according to claim 4 is characterized in that described ball-bearing casing is a deep groove ball bearing.
6. the complementary duplex bearing carrying roller of band conveyor according to claim 4 is characterized in that the outside of described roller is provided with the roller sleeve pipe of super high molecular weight modified polyethylene material.
7. according to the complementary duplex bearing carrying roller of each described band conveyor in the claim 1 to 6, it is characterized in that, described plain bearing is positioned at the outer end of ball-bearing casing, plain bearing and hermetically-sealed construction join, ball-bearing casing oil packing dish is set below the described ball-bearing casing, and the following and bearing seat of described ball-bearing casing oil packing dish joins.
8. according to the complementary duplex bearing carrying roller of each described band conveyor in the claim 1 to 6, it is characterized in that described ball-bearing casing is positioned at the outer end of plain bearing, described ball-bearing casing and hermetically-sealed construction join, and the following and bearing seat of described plain bearing joins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201767764U CN201089639Y (en) | 2007-10-18 | 2007-10-18 | Complementary duplex bearing supporting roller of belt conveyer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201767764U CN201089639Y (en) | 2007-10-18 | 2007-10-18 | Complementary duplex bearing supporting roller of belt conveyer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201089639Y true CN201089639Y (en) | 2008-07-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201767764U Expired - Fee Related CN201089639Y (en) | 2007-10-18 | 2007-10-18 | Complementary duplex bearing supporting roller of belt conveyer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201089639Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398769A (en) * | 2011-10-26 | 2012-04-04 | 铜陵百瑞豪科技有限公司 | Roller with waterproof ring |
| CN102641818A (en) * | 2012-04-09 | 2012-08-22 | 安徽赛远薄钢科技有限公司 | Duplex bearing color coating roller |
| CN102673973A (en) * | 2012-05-08 | 2012-09-19 | 山东鼎鑫矿用新材料有限公司 | Maintenance free modified plastic carrier roller |
| CN103789728A (en) * | 2012-10-30 | 2014-05-14 | 上海永超真空镀铝有限公司 | Double-bearing transmission roller device |
| CN104129612A (en) * | 2013-05-02 | 2014-11-05 | 力博重工科技股份有限公司 | A taper-shape ultra high molecular weight polyethylene spiral carrier roller |
| CN104500581A (en) * | 2014-12-19 | 2015-04-08 | 大唐桂冠合山发电有限公司 | Roller bearing seal structure of vacuum belt filter of desulfurizing system |
| CN108644080A (en) * | 2018-05-04 | 2018-10-12 | 煤炭科学技术研究院有限公司 | A kind of belt roller power generator |
-
2007
- 2007-10-18 CN CNU2007201767764U patent/CN201089639Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398769A (en) * | 2011-10-26 | 2012-04-04 | 铜陵百瑞豪科技有限公司 | Roller with waterproof ring |
| CN102641818A (en) * | 2012-04-09 | 2012-08-22 | 安徽赛远薄钢科技有限公司 | Duplex bearing color coating roller |
| CN102673973A (en) * | 2012-05-08 | 2012-09-19 | 山东鼎鑫矿用新材料有限公司 | Maintenance free modified plastic carrier roller |
| CN103789728A (en) * | 2012-10-30 | 2014-05-14 | 上海永超真空镀铝有限公司 | Double-bearing transmission roller device |
| CN103789728B (en) * | 2012-10-30 | 2016-05-18 | 上海永超真空镀铝有限公司 | Duplex bearing conduction roller arrangement |
| CN104129612A (en) * | 2013-05-02 | 2014-11-05 | 力博重工科技股份有限公司 | A taper-shape ultra high molecular weight polyethylene spiral carrier roller |
| CN104500581A (en) * | 2014-12-19 | 2015-04-08 | 大唐桂冠合山发电有限公司 | Roller bearing seal structure of vacuum belt filter of desulfurizing system |
| CN108644080A (en) * | 2018-05-04 | 2018-10-12 | 煤炭科学技术研究院有限公司 | A kind of belt roller power generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20091118 |