CN102900384B - Normally-closed hydraulic chuck for coalmine driller - Google Patents
Normally-closed hydraulic chuck for coalmine driller Download PDFInfo
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- CN102900384B CN102900384B CN201210400879.XA CN201210400879A CN102900384B CN 102900384 B CN102900384 B CN 102900384B CN 201210400879 A CN201210400879 A CN 201210400879A CN 102900384 B CN102900384 B CN 102900384B
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- hexagonal shaft
- drilling machine
- chuck
- hexagonal axis
- interior hexagonal
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Abstract
The invention discloses a normally-closed hydraulic chuck for a coalmine driller. The normally-closed hydraulic chuck comprises an outer hexagonal shaft (1), an inner hexagonal shaft (3), a ball pin (4) and a clamp ring (5), wherein one end of the outer hexagonal shaft is connected with a power output shaft of a drilling machine; the other end of the outer hexagonal shaft is supported on a toothed tile (10); the inner hexagonal shaft is sleeved on the outer hexagonal shaft; the clamping ring is arranged between a piston (8) and the toothed tile; an open groove is formed in the end surface of a shaft shoulder of the inner hexagonal shaft; the ball pin is embedded in the clamping ring; a ball head end of the ball pin is arranged in the open groove; and a disc spring group (2) is arranged between the outer hexagonal shaft and the inner hexagonal shaft. Compared with the prior art, the normally-closed hydraulic chuck has the advantages that heating and hydraulic oil leakage of the chuck working at great load for a long time are avoided, the long-time pressure maintenance is realized, the impact on a hydraulic motor, a gear driving system and a drill bit is reduced, the reliability of the drilling machine is improved and the service life of the drilling machine is prolonged; and meanwhile, the radial size of the chuck is reduced, and further the rotation inertia is reduced and the service requirement of an underground drilling machine of the coalmine is met.
Description
Technical field
The present invention relates to a kind of clamping device, specifically a kind of coal mine drilling machine closed type oild chuck.
Background technology
At present, the chuck form that underground coal mine rig uses has hydraulic clamp spring to unclamp chuck and the connecting rod clamping type chuck of open type.Chuck long-term work under larger load that hydraulic clamp spring unclamps open type is easily generated heat, and the situation of hydraulic fluid leak easily appears in valve and hydraulic cylinder, not easily long-time pressurize; And the radial displacement of connecting rod clamping type chuck tooth watt is comparatively large, cause the dynamic moment of inertia of chuck large.All do not meet the instructions for use of underground coal mine rig.In addition; above-mentioned chuck does not have the function of overload protection; cause the impact because of load in boring procedure; and very large impact is brought on hydraulic motor, gear train assembly and drill bit; reduce the application life of rig, the serious security incident such as bit matrix damage, gear tooth breakage even occurs.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of coal mine drilling machine closed type oild chuck, solve hydraulic clamp spring in above-mentioned prior art and unclamp the chuck of open type and the defect of connecting rod clamping type chuck existence, avoid the situation of chuck long-term work heating and hydraulic fluid leak under larger load, realize long-time pressurize, reduce hydraulic motor, the impact of gear train assembly and drill bit, improve rig reliability and application life, reduce the radial dimension of chuck simultaneously, then dynamic moment of inertia is reduced, to meet the instructions for use of underground coal mine rig.
To achieve these goals, the present invention includes the bearing and piston that are connected with hydraulic jack, and the tooth watt to be connected with drilling rod, also comprise outer-hexagonal axle, interior hexagonal axis, ball stud and collar, one end of described outer-hexagonal axle is provided with the internal spline coordinated with rig power output shaft, this internal spline can be involute shape tooth or rectangular teeth, and the end of the other end is against on tooth watt; Interior hexagonal axis is sleeved on outer-hexagonal axle, collar is arranged between piston and tooth watt, the shaft shoulder end face of interior hexagonal axis is provided with open slot, at least be evenly equipped with that 3 ball studs are nested to be arranged in collar, the bulb end of ball stud is placed in described open slot, other end hexagon socket head cap screw is fastening, be provided with disc spring group between the shaft shoulder of hexagonal axis and interior hexagonal axis outside vertically, this disc spring group is connected with hexagon socket head cap screw by ball stud.
The internal spline that one end that outer-hexagonal axle is connected with rig power output shaft is offered is involute shape tooth.
The shaft shoulder open slot number of interior hexagonal axis, the number of ball stud, the number of collar and the number of hexagon socket head cap screw are 6 to 12.
Increase and decrease pad is installed between interior hexagonal axis and disc spring group.
The invention has the beneficial effects as follows: compared with prior art, this closed type oild chuck structure is simple, easy to use, inside does not have easy-to-rust element, when the steady rig of load normally works, it can clamp drilling rod and with unit head synchronous axial system, when service load exceeds setting value particularly load sharply increases, interior hexagonal axis and ball stud relatively rotate, avoid the situation of chuck long-term work heating and hydraulic fluid leak under larger load, realize long-time pressurize, greatly reduce hydraulic motor, the impact of gear train assembly and drill bit, improve reliability and the application life of rig, need the time of falling drilling rod, working solution force feed enters hydraulic cylinder, and piston promotes collar by bearing and moves to left, and tooth watt is opened.When different rig nominal torque is different, by spinning in and out hexagon socket head cap screw or increase and decrease the size that pad changes disc spring pressing power realize between interior hexagonal axis and disc spring group, radial dimension is constant, because the radial dimension of this closed type safe hydraulic pressure chuck is less, thus dynamic moment of inertia is also less, has met the instructions for use of underground coal mine rig.
Accompanying drawing explanation
Fig. 1 is agent structure schematic diagram of the present invention.
In figure: 1, outer-hexagonal axle, 2, disc spring group, 3, interior hexagonal axis, 4, ball stud, 5, collar, 6, bearing, 7, hydraulic jack, 8, piston, 9, hexagon socket head cap screw, 10, tooth watt, 11, drilling rod.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Figure 1, this closed type oild chuck comprises the bearing 6 and piston 8 that are connected with hydraulic jack 7, and the tooth to be connected with drilling rod 11 watts 10, also comprise outer-hexagonal axle 1, interior hexagonal axis 3, ball stud 4 and collar 5, one end of described outer-hexagonal axle 1 is provided with the internal spline coordinated with rig power output shaft, this internal spline can be involute shape tooth or rectangular teeth, and the end of the other end is against on tooth watts 10; Interior hexagonal axis 3 is sleeved on outer-hexagonal axle 1, collar 5 is arranged between piston 8 and tooth watts 10, the shaft shoulder end face of interior hexagonal axis 3 is provided with open slot, at least be evenly equipped with that 3 ball studs 4 are nested to be arranged in collar 5, the bulb end of ball stud 4 is placed in described open slot, other end hexagon socket head cap screw 9 is fastening, be provided with disc spring group 2 between the shaft shoulder of hexagonal axis 1 and interior hexagonal axis 3 outside vertically, this disc spring group 2 is connected with hexagon socket head cap screw 9 by ball stud 4.
The internal spline that one end that the present invention China and foreign countries hexagonal axis 1 is connected with rig power output shaft is offered, preferably adopts the internal spline of involute shape tooth, because it is convenient to processing, easy to use.Install drilling rod time, primer fluid compressing cylinder 7 transmitting torque clamping drilling rod, the steady rig of load normally works, namely can clamp drilling rod 11 and with unit head synchronous axial system.When needing down drilling rod 11, working solution force feed enters hydraulic jack 7, and piston 8 promotes collar 5 by bearing 6 and moves to left, and tooth watts 10 is opened, and namely can realize down the work of drilling rod 11.
The shaft shoulder open slot number of interior hexagonal axis 3, the number of ball stud 4, the number of collar 5 and the number of hexagon socket head cap screw 9 mutually corresponding, be 6 to 12, concrete number can according to actual condition need and determine.When service load exceeds setting value particularly load sharply increases, interior hexagonal axis 3 relatively rotates with ball stud 4, plays the effect of overload clutch, greatly reduces the impact to hydraulic motor, gear train assembly and drill bit, improve the reliability of rig.
When different rig nominal torque is different, can by screwing hexagon socket head cap screw 9, or install between interior hexagonal axis 3 and disc spring group 2 and increase and decrease the size that pad changes disc spring pressing power and realize, to adjust safe torque, simultaneously because the radial dimension of this closed type safe hydraulic pressure chuck is less, radial dimension is constant, and therefore dynamic moment of inertia is also less, meets the instructions for use of underground coal mine rig.
When service load exceeds setting value; particularly when load sharply increases above setting moment of torsion; the open slot of interior hexagonal axis 3 shaft shoulder is separated with ball stud 4 and relatively rotates; interior hexagonal axis 3 is by reciprocating compression disc spring group 2; now stopping is turned round with drilling rod 11 by collar 5, tooth watts 10; staff takes emergency protection measure immediately, adopts lower rate of penetration to creep into by recovering normal drilling rate after load drastic change district.
Claims (3)
1. a coal mine drilling machine closed type oild chuck, comprise the bearing (6) and piston (8) that are connected with hydraulic jack (7), and the tooth watt (10) to be connected with drilling rod (11), it is characterized in that, also comprise outer-hexagonal axle (1), interior hexagonal axis (3), ball stud (4) and collar (5), one end of described outer-hexagonal axle (1) is provided with the internal spline coordinated with rig power output shaft, this internal spline is involute shape tooth or rectangular teeth, and the end of the other end is against on tooth watt (10), interior hexagonal axis (3) is sleeved on outer-hexagonal axle (1), collar (5) is arranged between piston (8) and tooth watt (10), the shaft shoulder end face of interior hexagonal axis (3) is provided with open slot, at least be evenly equipped with that 3 ball studs (4) are nested to be arranged in collar (5), the bulb end of ball stud (4) is placed in described open slot, other end hexagon socket head cap screw (9) is fastening, between the shaft shoulder of hexagonal axis (1) and interior hexagonal axis (3) outside vertically, disc spring group (2) is installed, this disc spring group (2) is connected with hexagon socket head cap screw (9) by ball stud (4).
2. a kind of coal mine drilling machine closed type oild chuck according to claim 1, it is characterized in that, the shaft shoulder open slot number of interior hexagonal axis (3), the number of ball stud (4), the number of collar (5) and the number of hexagon socket head cap screw (9) are 6 to 12.
3. a kind of coal mine drilling machine closed type oild chuck according to claim 1 and 2, is characterized in that, between interior hexagonal axis (3) and disc spring group (2), be provided with increase and decrease pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210400879.XA CN102900384B (en) | 2012-10-19 | 2012-10-19 | Normally-closed hydraulic chuck for coalmine driller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210400879.XA CN102900384B (en) | 2012-10-19 | 2012-10-19 | Normally-closed hydraulic chuck for coalmine driller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102900384A CN102900384A (en) | 2013-01-30 |
| CN102900384B true CN102900384B (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210400879.XA Active CN102900384B (en) | 2012-10-19 | 2012-10-19 | Normally-closed hydraulic chuck for coalmine driller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102900384B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014294B (en) * | 2016-07-01 | 2018-05-22 | 重庆市能源投资集团科技有限责任公司 | A kind of drilling rod stopping mechanism |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2002027C1 (en) * | 1991-02-27 | 1993-10-30 | Goj Vladimir L | Drill chuck |
| CN201241638Y (en) * | 2008-08-20 | 2009-05-20 | 石家庄中煤装备制造有限公司 | Constant-closed type hydraulic chuck |
| CN201258701Y (en) * | 2008-09-08 | 2009-06-17 | 浙江杭钻机械制造股份有限公司 | Combined hydraulic clamping chuck |
| CN101956537A (en) * | 2010-09-07 | 2011-01-26 | 镇江安达煤矿专用设备有限公司 | Hydraulic chunk with function of compensatory clamping |
| CN201786286U (en) * | 2010-09-28 | 2011-04-06 | 石家庄中煤装备制造有限公司 | Hydraulic chuck for clamping drilling rod by means of wedged-groove |
| CN201851044U (en) * | 2010-11-18 | 2011-06-01 | 重庆平山矿山机电设备有限公司 | Chuck of drilling rig |
| CN202467712U (en) * | 2012-01-17 | 2012-10-03 | 江苏省无锡探矿机械总厂有限公司 | Nitrogen spring type hydraulic chuck |
| CN202882797U (en) * | 2012-10-19 | 2013-04-17 | 徐州五洋科技股份有限公司 | Normally-closed type hydraulic chuck for drilling machine of coal miner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE523629C2 (en) * | 2001-11-29 | 2004-05-04 | Atlas Copco Rocktech Ab | Grip pliers mounted on a support for clamping action against a drill rod |
-
2012
- 2012-10-19 CN CN201210400879.XA patent/CN102900384B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2002027C1 (en) * | 1991-02-27 | 1993-10-30 | Goj Vladimir L | Drill chuck |
| CN201241638Y (en) * | 2008-08-20 | 2009-05-20 | 石家庄中煤装备制造有限公司 | Constant-closed type hydraulic chuck |
| CN201258701Y (en) * | 2008-09-08 | 2009-06-17 | 浙江杭钻机械制造股份有限公司 | Combined hydraulic clamping chuck |
| CN101956537A (en) * | 2010-09-07 | 2011-01-26 | 镇江安达煤矿专用设备有限公司 | Hydraulic chunk with function of compensatory clamping |
| CN201786286U (en) * | 2010-09-28 | 2011-04-06 | 石家庄中煤装备制造有限公司 | Hydraulic chuck for clamping drilling rod by means of wedged-groove |
| CN201851044U (en) * | 2010-11-18 | 2011-06-01 | 重庆平山矿山机电设备有限公司 | Chuck of drilling rig |
| CN202467712U (en) * | 2012-01-17 | 2012-10-03 | 江苏省无锡探矿机械总厂有限公司 | Nitrogen spring type hydraulic chuck |
| CN202882797U (en) * | 2012-10-19 | 2013-04-17 | 徐州五洋科技股份有限公司 | Normally-closed type hydraulic chuck for drilling machine of coal miner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102900384A (en) | 2013-01-30 |
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