CN203362173U - Shield machine cutter head capable of preventing edge scrapers from falling - Google Patents
Shield machine cutter head capable of preventing edge scrapers from falling Download PDFInfo
- Publication number
- CN203362173U CN203362173U CN 201320454610 CN201320454610U CN203362173U CN 203362173 U CN203362173 U CN 203362173U CN 201320454610 CN201320454610 CN 201320454610 CN 201320454610 U CN201320454610 U CN 201320454610U CN 203362173 U CN203362173 U CN 203362173U
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- cutter head
- edge
- shield machine
- shield
- edge doctor
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- Expired - Fee Related
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model provides a shield machine cutter head capable of preventing edge scrapers from falling. The shield machine cutter head comprises a cutter head body, wherein a plurality of shield spokes, edge hobs, hobs and edge scrapers are distributed on the cutter head body, and the edge scrapers are installed on two sides of each shield spoke. The shield machine cutter head is characterized in that a metal check block is arranged on the back side of a blade of each edge scraper, each metal check block is welded on the corresponding shield spoke, and the height of each metal check block is lower than the height of the blade of each edge scraper. According to the shield machine cutter head, the metal check block is additionally arranged on the back side of the blade of each edge scraper to limit the displacement of the blade to a cutting force direction, and after expanding bolt holes of original edge scrapers, a thread bushing is additionally arranged and used for connection, so that the shield machine cutter head has good tensile resistance for sharing a bolt to prevent the phenomena such as bad teeth and screws, broken bolts and bolt loosening; even if the phenomenon of bad teeth and screws occurs, only the thread bushing needs to be replaced, so that the bolts are prevented from falling off, and the working efficiency of a shield machine, project progress and project economic benefits are ensured.
Description
Technical field
The utility model relates to shield machine cutter, a kind of cutter head of shield machine that prevents that edge doctor from coming off particularly.
Background technology
Along with the fast development of China's subway engineering, shield method is built tunneling technique and is widely used.The shield structure is constructed in upper soft lower hard formation, and cutter abrasion are serious, easily damaged, come off.Once occur this class situation in driving, will cause the cutterhead moment of torsion to rise, the shield driving difficulty, even can't construct and be forced to the tool changing of opening the cabin.This caves in regard to easily causing excavation face, brings serious impact to duration, the cost of whole engineering, even threatens constructor's safety.Therefore, further investigate soft lower hard formation shield structure edge doctor come off feature, rule, seek to reduce the adeciduate method of shield cutter, the longest distance of upper soft lower not tool changing of hard formation shield structure driving just is significant.
At present, shield machine roller cutter cutterhead edge doctor is all that directly to adopt 11 M24 * 60 strength grades be 12.9 is bolted to cutterhead spoke both sides, and every spoke is installed left and right 2, and whole cutterhead is totally 12 edge doctor, as shown in Figure 1.The shield machine edge doctor is mainly used in antagonism and excavates the severe impact that hard rock, bulky grain gravel etc. produce, and plays edge protection hobboing cutter and cutterhead simultaneously.But, when hard rock tunnels, general every driving two or three ring there will be edge doctor positioning bolt hole silk tooth to damage in a large number, set bolt drops and cause edge doctor to come off phenomenon that edge doctor comes off.Its main cause is that edge doctor is to adopt bolt to fix, and is arranged on the edge doctor on spoke right side, when cutterhead turns clockwise, and cutting force F
cutbe applied on the blade with high-abrasive material blade cutting fractured rock, cutting force F fully
cutthe moment produced mainly the tensile force f that 11 M24 * 60 bolts provide of logical fixed cutting tool ' go balance, pulling force to be applied in a large number on bolt, bolt or destroy bolt hole internal thread tooth easily breaks; In like manner, be arranged on the edge doctor on the spoke left side, cutterhead is when being rotated counterclockwise, and because the countertorque of cutting force is provided, fixedly bolt or the destruction bolt hole internal thread tooth of left side scraper easily break.After destroying, bolt hole needs reaming tapping again, can cause a hole increasing, and on scraper, the counterbore size also needs again to enlarge simultaneously, to changing cutter, brings huge difficulty.
Summary of the invention
The utility model provides a kind of cutter head of shield machine that prevents that edge doctor from coming off according to the deficiencies in the prior art, this cutterhead Restricted edge scraper edge is to the displacement of cutting force direction, and can not affect the dismounting of edge doctor, the simple convenient operation of technique, guarantee that safety is cost-saving.
The further technical scheme of the utility model: described a kind of cutter head of shield machine that prevents that edge doctor from coming off, comprise cutter head, be distributed with a plurality of shield structure spokes, limit hobboing cutter, hobboing cutter and edge doctor at cutter head, described edge doctor is arranged on the both sides of each shield structure spoke, it is characterized in that: at each edge doctor blade dorsal part, be provided with metal backup, each metal backup is welded on corresponding shield structure spoke, and height is lower than the knife height of each edge doctor.
The further technical scheme of the utility model: in the connecting screw hole of each edge doctor and shield structure spoke, the bolt thread cover is installed, and the set bolt of each edge doctor is connected with the bolt thread external threading.
The more excellent technical scheme of the utility model: described metal backup adopts the Q235 metal backup, and height is lower than edge doctor cutting edge 12-16mm.
The more excellent technical scheme of the utility model: the bolt thread cover in described each connecting screw hole is after former screw reaming, to be arranged in former screw, and bolt thread cover model is M24 * 60.
The utility model increases block at edge doctor blade dorsal part, the restriction blade is to the displacement of cutting force direction, and the edge doctor bolt hole increases thread bush and connects by thread bush after drawing together hole originally, both possessed the good stretching resistance of sharing bolt, prevent the bad silk of bad tooth, Broken bolt, bolt looseness phenomenon, even the phenomenon of the bad silk of bad tooth occurs, only need to change thread bush and just can, avoid bolt falling, guaranteed the economic benefit of operating efficiency, engineering progress and the engineering of shield machine.
The accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is that positioning bolt hole and bolt thread cover are arranged schematic diagram;
Fig. 3 is block of the present utility model welding position schematic diagram.
In figure: 1-cutter head, 2-shield structure spoke, 3-limit hobboing cutter, 4-hobboing cutter, 5-metal backup, 6-edge doctor, 7-bolt thread cover.
The specific embodiment
Below in conjunction with accompanying drawing, the technical scheme in the utility model is clearly and completely described.In Fig. 1,3, described a kind of cutter head of shield machine that prevents that edge doctor from coming off, comprise cutter head 1, be distributed with a plurality of shield structure spokes 2, limit hobboing cutter 3, hobboing cutter 4 and edge doctor 6 at cutter head 1, described edge doctor 6 is arranged on the both sides of each shield structure spoke 2, it is characterized in that: be provided with metal backup 5 at each edge doctor 6 blade dorsal part, each metal backup 5 is welded on corresponding shield structure spoke 2, share the cutting force that edge doctor 6 is subject to, prevent that edge doctor from coming off.During welding block 5, the technical requirements block, lower than edge doctor 6 cutting edges, avoids affecting the normal use of edge doctor 6.Described metal backup 5 adopts the Q235 metal backup, and, highly lower than edge doctor 6 cutting edge 12-16mm, guarantees that edge doctor 6 blades contact the cutting scar fully, and according to the practical experience data, block 5 end faces are best lower than edge doctor 6 cutting edge 15mm effects.
In Fig. 2, bolt thread cover 7 is installed in the connecting screw hole of each edge doctor 6 and shield structure spoke 2, and the set bolt of each edge doctor 6 is threaded with bolt thread cover 7.Bolt thread cover 7 in described each connecting screw hole is after former screw reaming, to be arranged in former screw, and it is M24 * 60 that bolt thread overlaps 7 models.Can prevent that the bolt hole silk tooth on spoke 2 from damaging, after adopting the method, even after reaming, erection bolt thread bush 7 is destroyed, the bolt thread cover 7 that also can more renew easily.Specific practice is to adopt on magnetic drill the reaming of 24.8mm drill bit is installed, and adds emulsion, tapping oil, and, with the tapping of M28 screw tap, the thread bush of M24 * 60 is installed.
When the utility model turns clockwise at cutterhead, the face after cutting edge hobboing cutter 3 and hobboing cutter 4 cuttings, cutting force F cuts on edge doctor 6 blades that entirely are applied to high-abrasive material, the blade fractured rock.Cutting force F cuts produced moment and mainly is applied in a large number on bolt by being fixed on the tensile force f that 11 M24 * 60 bolts provide on the bolt thread cover 7 of installing after reaming ' go balance, tensile force f ', and bolt or destroy bolt hole internal thread tooth easily breaks.The metal backup 5 that the material of welding is Q345 on right edge scraper 6 blade back side spokes 2, because of the scraper 6 counterclockwise displacements of restriction the right, and provide clockwise power F, the tensile force f provided with bolt ' come along balance F and cut, reduce bolt bearing tension F' thereby solve, reach the purpose that prevents that edge doctor from coming off; In like manner, spoke left side edge doctor adopts abovementioned technology, does not find the bad silk of bad tooth, bolt looseness and edge doctor obscission on Guan Hui in soft lower hard formation after driving more than 20 rings.
Claims (4)
1. a cutter head of shield machine that prevents that edge doctor from coming off, comprise cutter head (1), be distributed with a plurality of shield structure spokes (2), limit hobboing cutter (3), hobboing cutter (4) and edge doctor (6) at cutter head (1), described edge doctor (6) is arranged on the both sides of each shield structure spoke (2), it is characterized in that: at each edge doctor (6) blade dorsal part, be provided with metal backup (5), it is upper that each metal backup (5) is welded on corresponding shield structure spoke (2), and height is lower than the knife height of each edge doctor (6).
2. the cutter head of shield machine that prevents that edge doctor from coming off according to claim 1, it is characterized in that: in the connecting screw hole of each edge doctor (6) and shield structure spoke (2), bolt thread cover (7) is installed, and the set bolt of each edge doctor (6) is threaded with bolt thread cover (7).
3. the cutter head of shield machine that prevents that edge doctor from coming off according to claim 1, is characterized in that; Described metal backup (5) adopts the Q235 metal backup, and height is lower than edge doctor (6) cutting edge 12-16mm.
4. the cutter head of shield machine that prevents that edge doctor from coming off according to claim 2 is characterized in that: the bolt thread cover (7) in described each connecting screw hole is after former screw reaming, to be arranged in former screw, and bolt thread cover (7) model is M24 * 60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320454610 CN203362173U (en) | 2013-07-29 | 2013-07-29 | Shield machine cutter head capable of preventing edge scrapers from falling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320454610 CN203362173U (en) | 2013-07-29 | 2013-07-29 | Shield machine cutter head capable of preventing edge scrapers from falling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203362173U true CN203362173U (en) | 2013-12-25 |
Family
ID=49809959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320454610 Expired - Fee Related CN203362173U (en) | 2013-07-29 | 2013-07-29 | Shield machine cutter head capable of preventing edge scrapers from falling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203362173U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005770A (en) * | 2014-05-06 | 2014-08-27 | 中铁十五局集团有限公司 | Spoke type shield cutter head |
| CN104060996A (en) * | 2014-07-03 | 2014-09-24 | 北京城建设计发展集团股份有限公司 | Combined shield cutter disk for mutual intrusion composite rock strata with uneven hardness |
| CN105114088A (en) * | 2015-08-28 | 2015-12-02 | 济南轨道交通集团有限公司 | Front end soil cutting partition device of shield tunneling machine and cutting cover |
-
2013
- 2013-07-29 CN CN 201320454610 patent/CN203362173U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005770A (en) * | 2014-05-06 | 2014-08-27 | 中铁十五局集团有限公司 | Spoke type shield cutter head |
| CN104005770B (en) * | 2014-05-06 | 2016-01-20 | 中铁十五局集团有限公司 | Spoke type shield cutter head |
| CN104060996A (en) * | 2014-07-03 | 2014-09-24 | 北京城建设计发展集团股份有限公司 | Combined shield cutter disk for mutual intrusion composite rock strata with uneven hardness |
| CN105114088A (en) * | 2015-08-28 | 2015-12-02 | 济南轨道交通集团有限公司 | Front end soil cutting partition device of shield tunneling machine and cutting cover |
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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: 20131225 Termination date: 20200729 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |