CN203961814U - Jumbolter drilling rod quick-connect machanism - Google Patents
Jumbolter drilling rod quick-connect machanism Download PDFInfo
- Publication number
- CN203961814U CN203961814U CN201420308306.9U CN201420308306U CN203961814U CN 203961814 U CN203961814 U CN 203961814U CN 201420308306 U CN201420308306 U CN 201420308306U CN 203961814 U CN203961814 U CN 203961814U
- Authority
- CN
- China
- Prior art keywords
- drilling rod
- keyway
- tube
- hole
- jumbolter
- 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
- Earth Drilling (AREA)
Abstract
The utility model discloses a kind of jumbolter drilling rod quick-connect machanism, comprise drilling rod tailstock (1), drilling rod (2), drilling rod adapter sleeve (3), sealing ring (4), key (5), skim mouthful " U " type card (6) and drill bit connector (7), drilling rod tailstock one end connects unit head, the other end is tube-in-tube structure (1.1), tube-in-tube structure inside is provided with ladder nested structure and keyway I (1.4), and the waist type that outer radial is provided with is installed through hole (1.3); Two ends of drill is arranged to supporting multidiameter structure, is provided with seal groove (2.1), " U " type draw-in groove (2.2) and keyway I (2.3); The ladder nested structure that the internal construction of drilling rod adapter sleeve axis of symmetry both sides, external structure are arranged to same tube-in-tube structure, waist type are installed through hole.This drilling rod quick-connect machanism adopts key to connect and the mode that is connected and fixed and the sealing ring sealing of " U " type of pegging graft card, can realize quickly dismantled and sealing, and simple to operate, be convenient to safeguard.
Description
Technical field
The utility model relates to a kind of drilling rod quick-connect machanism, and specifically a kind of jumbolter drilling rod quick-connect machanism, belongs to coal mine machinery equipment field.
Background technology
Jumbolter is to Special drilling equipment that for bolt support, bolthole, anchor cable hole are holed in coal mine roadway bolt support work.
Jumbolter is generally drilling tool to be installed on unit head and to be driven drilling tool to realize boring in revolution mode, drilling tool comprises drilling rod, drilling rod adapter sleeve, drill bit connector and drill bit, the length of drilling rod is generally certain and arranges many, conventionally according to the projected depth of need boring, by drilling rod adapter sleeve, receive many drilling rods, finally connect drill bit connector and drill bit, hole darker, the drilling rod radical connecting is more; After boring, need one save the drilling rod of connection and drilling rod adapter sleeve are unloaded.
At present, between the drilling rod using in China's coal-mine tunnel boring and drilling rod adapter sleeve, thread connection that between drilling rod and drill bit connector, generally employing thread rotary orientation is identical with drilling rod direction of rotation, be threaded firmly jointed rod and drilling rod adapter sleeve, drill bit connector, but also there is following defect:
1. because drilling rod bears and transmit larger moment of torsion when holing, and the rotation direction of connecting thread is identical with drilling rod direction of rotation, therefore cause drilling rod adapter sleeve can turn tighter and tighter with the rotation of understanding along with drilling rod that is threaded between drilling rod, and then cause and after boring, directly take spanner dismounting drilling rod adapter sleeve and drilling rod very difficult, must use hammer repeatedly to beat drilling rod and drilling rod adapter sleeve, after connecting screw thread shake pine, could dismantle smoothly, waste time and energy;
2. because connecting, regular screw threads do not possess sealability, therefore can cause the connecting portion of drilling rod and drilling rod adapter sleeve to leak, cause the hydraulic pressure at drill bit position, top not enough, even cause dry perforating phenomenon, drill bit cannot obtain effectively cooling, and inefficiency and drilling life of bit shorten;
3. owing to being threaded, only have a rotation direction, so drilling rod when reverse rotation in boring procedure, rock to the resistance of drilling rod and drilling rod adapter sleeve and equipment vibrations easily cause be threaded loosening.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of jumbolter drilling rod quick-connect machanism, can realize Fast Installation and dismounting, and guarantee the sealing effectiveness of connected mode, increases work efficiency, and can realize any rotating of drilling rod.
To achieve these goals, this jumbolter drilling rod quick-connect machanism comprises drilling rod tailstock, drilling rod, drilling rod adapter sleeve, sealing ring, key, slash mouth " U " type card and drill bit connector;
Described drilling rod tailstock Zhou center is provided with through hole, one end is by being connected jumbolter unit head with six side's ribs of unit head interface dimensional fits on the body of rod, the other end is tube-in-tube structure, centre is provided with positioning step, ladder nested structure is arranged in the inside of tube-in-tube structure, from cover endface position, be inwardly provided with successively large chamber and loculus, large chamber section is overlapped the waist type installation through hole that endface position is inwardly provided with successively the keyway I of axial setting and radially arranges certainly, and waist type is installed through hole and is symmetricly set in tube-in-tube structure exterior periphery direction;
Described drilling rod is symmetrical structure, Qi Zhou center is provided with through hole, multidiameter structure is all arranged at two ends, from axial end, be inwardly provided with successively path and large footpath, the outside dimension in path and large footpath, length dimension respectively with the large chamber of tube-in-tube structure and the internal diameter size of loculus, length dimension coordinates, path section is provided with seal groove, large footpath section is inwardly provided with " U " type draw-in groove and keyway II successively from axial end, the distance that " U " type draw-in groove is installed the large chamber of through hole distance section inner side end apart from the distance of large footpath section axial end with waist type is identical, the position of the corresponding keyway I of keyway II, and the dimensional fits of the size of keyway II and keyway I,
Described drilling rod adapter sleeve is symmetrical structure, and the internal construction of axis of symmetry both sides, external structure are arranged to ladder nested structure, the waist type of same tube-in-tube structure through hole is installed;
Described sealing ring and seal groove dimensional fits, and be arranged on seal groove;
The dimensional fits of the size of described key and keyway I, keyway II, and be arranged in keyway I, keyway II;
Described slash mouth " U " type card is installed through hole from waist type and is inserted installation;
Described drill bit connector is nested structure, and one end is provided with ladder nested structure and the waist type of same tube-in-tube structure through hole is installed, and the other end is provided with the internal thread that external screw thread coordinates that is connected with drill bit.
As further improvement of the utility model scheme, the quantity of described keyway I is two, is axially symmetricly set in the section of the large chamber of ladder nested structure.
As further improvement of the utility model scheme, 90 ° of settings of keyway I spatial intersecting at described drilling rod adapter sleeve two ends.
As further improvement of the utility model scheme, on one side installing the waist type of through hole, described waist type is provided with ramp structure.
As further improvement of the utility model scheme, described key is fixedly connected in keyway II.
As preferred version of the present utility model, described key is fixedly connected in keyway II by the mode of interference fit.
Compared with prior art, this jumbolter drilling rod quick-connect machanism is because the mode that adopts key to connect realizes being connected of drilling rod and drilling rod adapter sleeve, adopt the mode of slash mouthful " U " type card of pegging graft to realize the fixing of drilling rod and drilling rod adapter sleeve, so easy accessibility, time saving and energy saving; Because inside is provided with sealing ring, therefore can guarantee that the connecting portion of drilling rod and drilling rod adapter sleeve can not leak, and then it is effectively cooling to guarantee that drill bit obtains, operating efficiency is high and drilling life of bit is long; Because the mode that adopts key to connect realizes being connected of drilling rod and drilling rod adapter sleeve, therefore there is not the loosening situation of drilling rod of reversing; Owing to having adopted the easily renewal part such as flat key, sealing ring, " U " type card in groundwork original paper, the application life of therefore having improved drilling rod, and simple to operate, be convenient to safeguard.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the B-B view of Fig. 1;
Fig. 4 is that the C of Fig. 1 is to partial view.
In figure: 1, drilling rod tailstock, 1.1, tube-in-tube structure, 1.2, positioning step, 1.3, waist type is installed through hole, and 1.4, keyway I, 2, drilling rod, 2.1 seal grooves, 2.2, " U " type draw-in groove, 2.3, keyway II, 3, drilling rod adapter sleeve, 4, sealing ring, 5 keys, 6, skim mouthful " U " type card, 7, drill bit connector, 8, drill bit.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, this jumbolter drilling rod quick-connect machanism comprises drilling rod tailstock 1, drilling rod 2, drilling rod adapter sleeve 3, sealing ring 4, key 5, skims mouthful " U " type card 6 and drill bit connector 7.
Described drilling rod tailstock 1 Zhou center is provided with through hole, one end is by being connected jumbolter unit head with six side's ribs of unit head interface dimensional fits on the body of rod, the other end is tube-in-tube structure 1.1, centre is provided with positioning step 1.2, ladder nested structure is arranged in the inside of tube-in-tube structure 1.1, from cover endface position, be inwardly provided with successively large chamber and loculus, large chamber section is overlapped the waist type installation through hole 1.3 that endface position is inwardly provided with successively the keyway I 1.4 of axial setting and radially arranges certainly, and waist type is installed through hole 1.3 and is symmetricly set in tube-in-tube structure 1.1 exterior periphery directions.
Described drilling rod 2 is symmetrical structures, Qi Zhou center is provided with through hole, multidiameter structure is arranged at two ends, from axial end, be inwardly provided with successively path and large footpath, the outside dimension in path and large footpath, length dimension respectively with the large chamber of tube-in-tube structure 1.1 and the internal diameter size of loculus, length dimension coordinates, path section is provided with seal groove 2.1, large footpath section is inwardly provided with " U " type draw-in groove 2.2 and keyway II 2.3 successively from axial end, the distance that " U " type draw-in groove 2.2 is installed the through hole 1.3 large chamber of distance section inner side ends apart from the distance of large footpath section axial end with waist type is identical, the position of the corresponding keyway I 1.4 of keyway II 2.3, and the dimensional fits of the size of keyway II 2.3 and keyway I 1.4.
Described drilling rod adapter sleeve 3 is symmetrical structures, and the internal construction of axis of symmetry both sides, external structure are arranged to ladder nested structure, the waist type of same tube-in-tube structure 1.1 through hole 1.3 is installed.
Described sealing ring 4 and seal groove 2.1 dimensional fits, and be arranged on seal groove 2.1.
The dimensional fits of the size of described key 5 and keyway I 1.4, keyway II 2.3, and be arranged in keyway I 1.4, keyway II 2.3.
As shown in Figure 3, described slash mouth " U " type card 6 is installed through hole 1.3 places from waist type and is inserted installation, be used for being fixedly connected with drilling rod 2 and drilling rod adapter sleeve 3 and drill bit connector 7, after 6 installations of slash mouthful " U " type card, should submerge in groove and " U " type draw-in groove 2.3, while preventing work, wear and tear.
Described drill bit connector 7 is nested structures, and one end is provided with ladder nested structure and the waist type of same tube-in-tube structure 1.1 through hole 1.3 is installed, and the other end is provided with the internal thread that external screw thread coordinates that is connected with drill bit 8.
This jumbolter drilling rod quick-connect machanism when mounted, first drilling rod tailstock 1 is inserted in drill power head and locking, again drilling rod 2 is inserted in drilling rod tailstock 1 and with skimming mouthful " U " type card 6 location, then jointed rod adapter sleeve 3 and drilling rod 2, also with skimming mouthful " U " type card 6 location, finally connect drill bit connector 7 and drill bit 8 successively.
In use, first with connecting first segment drilling rod 2, hole to drilling rod 2 ends, then remove and skim mouthful " U " type card 6, install the rear continuation boring of second section drilling rod 2 additional, by that analogy, until meet the requirements of drilling depth.
In when dismounting, the reversion of operation jumbolter, dismantles while exiting a joint drilling rod 2, after then installing, continues reversion, by that analogy, until drilling rod 2, drill bit 8 all exit.
During drilling rod 2 rotation, mainly bear moment of torsion and axial compression, wherein moment of torsion is transmitted by key 5, and axial force is born by the large resonator end surface of drilling rod adapter sleeve 3, now skims mouthful " U " type card 6 and does not stress; During drilling rod 2 reversion retraction, be mainly subject to axial tension, this axial force is less, by skimming mouthful " U " type card 6, bears, and slash mouth " U " type card 6 that reverse on one side while dismantling is stressed less.
In order effectively to guarantee transmitting torque, as further improvement of the utility model scheme, as shown in Figure 1 and Figure 2, the quantity of described keyway I 1.4 is two, axially be symmetricly set in the section of the large chamber of ladder nested structure, two key settings are transmitting torque and can prevent that singly-bound from connecting and cause too greatly damage because of moment of torsion effectively.
In order to guarantee the intensity of drilling rod adapter sleeve 3, prevent that because of inner two ends, offering keyway I 1.4 affects bulk strength, as further improvement of the utility model scheme, 90 ° of settings of keyway I 1.4 spatial intersecting at described drilling rod adapter sleeve 3 two ends.
In order to realize slash for convenience detach mouthful " U " type card 6, as further improvement of the utility model scheme, as shown in Figure 4, the waist type that described waist type is installed through hole 1.3 is provided with ramp structure on one side, instrument can be skimmed to a mouthful root for " U " type card 6 from the insertion of ramp structure place and be prized when mouth " U " type card 6 is skimmed in dismounting.
For fast and easy jointed rod 2 and drilling rod adapter sleeve 3, as further improvement of the utility model scheme, described key 5 is fixedly connected in keyway II 2.3, and the operation that can remove first fitting key 5 when jointed rod 2 and drilling rod adapter sleeve 3 from is set like this, makes connection faster.
Key 5 can be fixedly connected in keyway II 2.3 by the mode of pasting, the mode that also can connect by sunk screw is fixedly connected in keyway II 2.3, or adopt friction tight mode to be fixedly connected in keyway II 2.3, due to work under bad environment, the mode of pasting is insecure, easily drop, if it is inconvenient that firm pasting is changed again, although the mode that screw is fixedly connected with is convenient to change, also larger to its shearing force when but twisting resistance is too large, after cutting off, screw is difficult for taking out, therefore preferred first scheme, , as preferred version of the present utility model, described key 5 is fixedly connected in keyway II 2.3 by the mode of interference fit.
This jumbolter drilling rod quick-connect machanism easy accessibility is time saving and energy saving; Can guarantee that drilling rod 2 and the connecting portion of drilling rod adapter sleeve 3 can not leak, and then it is effectively cooling to guarantee that drill bit 8 obtains, high and drill bit 8 long service life of operating efficiency; There is not the loosening situation of reversion drilling rod; Improved the application life of drilling rod 2, and simple to operate, be convenient to safeguard.
Claims (6)
1. a jumbolter drilling rod quick-connect machanism, comprise drilling rod tailstock (1), drilling rod (2), drilling rod adapter sleeve (3) and drill bit connector (7), drilling rod tailstock (1) Zhou center is provided with through hole, one end is by being connected jumbolter unit head with six side's ribs of unit head interface dimensional fits on the body of rod, the other end is tube-in-tube structure (1.1), and centre is provided with positioning step (1.2);
Drilling rod (2) is symmetrical structure, and Qi Zhou center is provided with through hole;
Drilling rod adapter sleeve (3) is symmetrical structure;
It is characterized in that, ladder nested structure is arranged in the inside of described tube-in-tube structure (1.1), from cover endface position, be inwardly provided with successively large chamber and loculus, large chamber section is overlapped the waist type installation through hole (1.3) that endface position is inwardly provided with successively the keyway I (1.4) of axial setting and radially arranges certainly, and waist type is installed through hole (1.3) and is symmetricly set in tube-in-tube structure (1.1) exterior periphery direction;
Multidiameter structure is arranged at described drilling rod (2) two ends, from axial end, be inwardly provided with successively path and large footpath, the outside dimension in path and large footpath, length dimension respectively with the large chamber of tube-in-tube structure (1.1) and the internal diameter size of loculus, length dimension coordinates, path section is provided with seal groove (2.1), large footpath section is inwardly provided with " U " type draw-in groove (2.2) and keyway II (2.3) successively from axial end, the distance that " U " type draw-in groove (2.2) is installed the large chamber of through hole (1.3) distance section inner side end apart from the distance of large footpath section axial end with waist type is identical, the position of the corresponding keyway I of keyway II (2.3) (1.4), and the dimensional fits of the size of keyway II (2.3) and keyway I (1.4),
Internal construction, the external structure of described drilling rod adapter sleeve (3) axis of symmetry both sides is arranged to ladder nested structure, the waist type of same tube-in-tube structure (1.1) through hole (1.3) is installed;
Also comprise sealing ring (4), key (5) and skim mouthful " U " type card (6), sealing ring (4) and seal groove (2.1) dimensional fits, and be arranged on seal groove (2.1);
The dimensional fits of the size of key (5) and keyway I (1.4), keyway II (2.3), and be arranged in keyway I (1.4), keyway II (2.3);
Skim mouthful " U " type card (6) and locate to insert installation from waist type installation through hole (1.3);
Described drill bit connector (7) is nested structure, and one end is provided with ladder nested structure and the waist type of same tube-in-tube structure (1.1) through hole (1.3) is installed, and the other end is provided with the internal thread that external screw thread coordinates that is connected with drill bit (8).
2. jumbolter drilling rod quick-connect machanism according to claim 1, is characterized in that, the quantity of described keyway I (1.4) is two, is axially symmetricly set in the section of the large chamber of ladder nested structure.
3. jumbolter drilling rod quick-connect machanism according to claim 1 and 2, is characterized in that, 90 ° of settings of keyway I (1.4) spatial intersecting at described drilling rod adapter sleeve (3) two ends.
4. jumbolter drilling rod quick-connect machanism according to claim 1 and 2, is characterized in that, described waist type through hole (1.3) is installed on one side waist type be provided with ramp structure.
5. jumbolter drilling rod quick-connect machanism according to claim 1 and 2, is characterized in that, described key (5) is fixedly connected in keyway II (2.3).
6. jumbolter drilling rod quick-connect machanism according to claim 5, is characterized in that, described key (5) is fixedly connected in keyway II (2.3) by the mode of interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420308306.9U CN203961814U (en) | 2014-06-11 | 2014-06-11 | Jumbolter drilling rod quick-connect machanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420308306.9U CN203961814U (en) | 2014-06-11 | 2014-06-11 | Jumbolter drilling rod quick-connect machanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203961814U true CN203961814U (en) | 2014-11-26 |
Family
ID=51922413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420308306.9U Expired - Fee Related CN203961814U (en) | 2014-06-11 | 2014-06-11 | Jumbolter drilling rod quick-connect machanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203961814U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838139A (en) * | 2016-09-21 | 2018-03-27 | 河南理工大学 | A kind of colliery Roofbolt drill rod conduction method |
| CN108547580A (en) * | 2018-06-21 | 2018-09-18 | 卓典机器人（海南）有限公司 | Drilling rod connection combination apparatus and drilling rod connect structure of breaking |
| CN110259391A (en) * | 2019-07-22 | 2019-09-20 | 山西天巨重工机械有限公司 | A kind of positive and negative rotation large torque transfer device |
| CN110552630A (en) * | 2019-10-15 | 2019-12-10 | 山东源运通矿山装备科技有限公司 | Electric coal drill rod |
| CN111206884A (en) * | 2020-03-21 | 2020-05-29 | 山东源运通矿山装备科技有限公司 | Drill rod connecting sleeve |
| CN112031670A (en) * | 2020-08-21 | 2020-12-04 | 中煤科工集团西安研究院有限公司 | Mining drill rod with anti-drop drilling function |
| CN112227975A (en) * | 2020-09-29 | 2021-01-15 | 中煤科工集团西安研究院有限公司 | Double-connection drill rod imitating animal tendon-bone structure |
| CN113700441A (en) * | 2021-11-01 | 2021-11-26 | 中煤科工集团西安研究院有限公司 | Mining drill rod male joint with fracture self-locking function and drill rod |
-
2014
- 2014-06-11 CN CN201420308306.9U patent/CN203961814U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838139A (en) * | 2016-09-21 | 2018-03-27 | 河南理工大学 | A kind of colliery Roofbolt drill rod conduction method |
| CN108547580A (en) * | 2018-06-21 | 2018-09-18 | 卓典机器人（海南）有限公司 | Drilling rod connection combination apparatus and drilling rod connect structure of breaking |
| CN108547580B (en) * | 2018-06-21 | 2024-01-12 | 卓典机器人(海口)有限公司 | Drill rod connection combination device and drill rod continuous breaking structure |
| CN110259391A (en) * | 2019-07-22 | 2019-09-20 | 山西天巨重工机械有限公司 | A kind of positive and negative rotation large torque transfer device |
| CN110259391B (en) * | 2019-07-22 | 2024-01-30 | 山西天巨重工机械有限公司 | Forward and reverse rotation large torque transmission device |
| CN110552630A (en) * | 2019-10-15 | 2019-12-10 | 山东源运通矿山装备科技有限公司 | Electric coal drill rod |
| CN111206884A (en) * | 2020-03-21 | 2020-05-29 | 山东源运通矿山装备科技有限公司 | Drill rod connecting sleeve |
| CN112031670B (en) * | 2020-08-21 | 2022-01-28 | 中煤科工集团西安研究院有限公司 | Mining drill rod with anti-drop drilling function |
| CN112031670A (en) * | 2020-08-21 | 2020-12-04 | 中煤科工集团西安研究院有限公司 | Mining drill rod with anti-drop drilling function |
| CN112227975B (en) * | 2020-09-29 | 2022-03-15 | 中煤科工集团西安研究院有限公司 | Double-connection drill rod imitating animal tendon-bone structure |
| CN112227975A (en) * | 2020-09-29 | 2021-01-15 | 中煤科工集团西安研究院有限公司 | Double-connection drill rod imitating animal tendon-bone structure |
| CN113700441B (en) * | 2021-11-01 | 2021-12-31 | 中煤科工集团西安研究院有限公司 | Mining drill rod male joint with fracture self-locking function and drill rod |
| CN113700441A (en) * | 2021-11-01 | 2021-11-26 | 中煤科工集团西安研究院有限公司 | Mining drill rod male joint with fracture self-locking function and drill rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203961814U (en) | Jumbolter drilling rod quick-connect machanism | |
| CN103953292B (en) | Fastening gapless type tool joint | |
| CN107288671B (en) | Construction method of soft crushed coal rock mass drilling, sealing and injecting integrated extendable anchor rod | |
| CN104948110A (en) | Hole digging machine capable of realizing anchorage through manual control and running safely | |
| CN104453729A (en) | Combined aluminum alloy double-wall drill pipe unit | |
| US9163671B2 (en) | Connecting device | |
| CN114183080A (en) | Positive and negative rotation automatic disassembly drill rod capable of transmitting large torque and operation method | |
| CN212958633U (en) | Green's shield tunnel entry driving machine cutter device | |
| CN111963103A (en) | Bridge plug convenient for mounting anchoring device | |
| CN103375135A (en) | Integrated concentric drill pipe | |
| CN102635320A (en) | Quick arc-shaped raised-edge drill rod dismounting device and method | |
| CN201372738Y (en) | Drill rod joint for conical surface sealing with dual purposes of positive and reverse circulation | |
| JP6039498B2 (en) | Drilling head | |
| CN105064910A (en) | Solar-powered heat dissipation hole digging machine | |
| CN205532354U (en) | Novel drilling rod assembly device | |
| CN104948103A (en) | Hole digging machine operating safely | |
| CN103615201A (en) | Centering device for drill rod in hole of engineering driller | |
| CN202895113U (en) | Pick-out device for locking ring assembly of well logging during drilling instrument | |
| CN202391351U (en) | Waterproof sleeve connecting device | |
| CN105064908A (en) | Hole digging machine realizing anchoring through being driven by air pressure cylinder | |
| CN202596608U (en) | Quickly-disassembling device for circular-arc bead drill pipe | |
| CN105041206A (en) | Hole digging machine manually controlling anchoring | |
| CN202266208U (en) | Non-excavation construction drilling rod quick release device | |
| CN201581831U (en) | Anti-loosening device for hydraulic chuck of full-hydraulic core drilling machine | |
| CN206737844U (en) | Drilling rod attachment structure |
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: 20141126 Termination date: 20150611 |
|
| EXPY | Termination of patent right or utility model |