CN202810644U - Medium-wind pressure high-speed rock drill - Google Patents
Medium-wind pressure high-speed rock drill Download PDFInfo
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- CN202810644U CN202810644U CN 201220445427 CN201220445427U CN202810644U CN 202810644 U CN202810644 U CN 202810644U CN 201220445427 CN201220445427 CN 201220445427 CN 201220445427 U CN201220445427 U CN 201220445427U CN 202810644 U CN202810644 U CN 202810644U
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Abstract
The utility model discloses a medium-wind pressure high-speed rock drill. The medium-wind pressure high-speed rock drill comprises a drill body part, one end of the drill body part is fixedly connected with a drill bit part, and the other end of the drill body part is fixedly connected with a drill tail part; a water injection valve group is arranged in the drill tail part and provided with a gas needle and a water needle, the gas needle is sheathed outside the water needle, and one ends of the gas needle and the water needle, far away from the water injection valve group, are arranged at the external part position close to the small diameter end of a piston by penetrating through the piston. According to the technical scheme, the gas needle and the water needle are both arranged inside the piston, water sprayed from the gas needle not only can play roles in purging blast holes and exhausting powder, but also can cool the drill bit part, and can ensure that the temperature of the whole rock drill and key components can be controlled 60 DEG C below when the rock rill is used under the wind pressure of 0.4-1.2Mpa, the rock drill can work normally, the service life of the rock drill can be prolonged, the span from the low wind pressure to the medium wind pressure of the rock drill can be realized, and the working efficiency of the rock drill can be improved by 100%.
Description
Technical field
The utility model relates to air drill, relates to specifically a kind of Wind pressure high speed rock drill, belongs to the air drill technical field.
Background technology
Air drill is the power tool of rock drilling boring during for mining, tunnel piercing, and its operating principle is take compressed air as power, and pushing piston moves back and forth, during stroke, and piston impact drilling tool cutter crushed rocks; During backhaul, the angle that the revolution of piston driving drilling tool is certain.Continuous impact, revolution make drilling tool dig out circular big gun hole at rock, realize boring.The hammer drill that uses at present uses air pressure to be defined as 0.4～0.63MPa, belong to low blast hammer drill, if blast surpasses upper limit 0.63MPa, the hammer drill operating rate increases substantially, the vital part rate of wear is also sharply accelerated, cause seriously shorten its application life, greatly reduce the application life of hammer drill.
At present hammer drill at work, inner body impacts and fricative heat is to lean on the compressed air in the work to take away, machine exterior then relies on air cooling fully.During hammer drill work, the average per minute reciprocating impact of piston 2220 times is rotated counterclockwise during the piston revolution, drive simultaneously the turning set High Rotation Speed, make turning set and head frictional heat, if depress use in normal wind, the serviceability temperature of machine is used normal below 60 degree.If but use blast to surpass 0.63MPa, when (0.63-1.2MPa) used under Wind pressure, the frequency of impact of hammer drill can reach about 3000 times, and the heat that machine produces is higher, therefore, heat can't be taken away by normal compressed air waste gas, the heat run-up, and machine temperature raises rapidly, through measuring, the surface temperature of head was raised in 30 minutes about 120 degree gradually, scalded easily when the operator operates or when changing drill steel, brought great inconvenience to the operator; The simultaneously rapid rising of copper spare friction temperature in piston and the turning set can reach about 1000 ℃, makes the fusing of copper spare, and part failure greatly reduces its application life.Blast is higher, and the rotating speed of hammer drill is faster, and machine temperature is higher, and service life of a machine is shorter.Therefore, present this air cooling system can't satisfy the cooling requirement of Wind pressure hammer drill, and the operating air pressure of hammer drill does not allow to surpass 0.4～0.63MPa, belongs to low blast hammer drill.
What generally use on the past market is the piston air compressor air feed, and air pressure is generally below the 0.63MPa, and it is no problem that hammer drill uses.But over nearly 3 years, screw air compressor major part has been finished production domesticization, and cost also drops to user's acceptable degree, because its failure rate is low, short time can be excused from a college course when using, and than piston air compressor greater advantage is arranged, and is therefore replacing rapidly piston machine.But its supply gas pressure is generally at 0.85MPa, even be 1.0MPa, because open-air tunnel user's use habit and usage level are limit, or the pursuit speed of application, basically all use in the upper limit, caused hammer drill too high because of blast, cutting rate is too fast, the machine steep temperature rise, fault rate rises, even the situation that can't normally use.
The liquid drugs injection length of tradition hammer drill is 400mm, air tube is 334mm, air tube is enclosed within outside the liquid drugs injection and the little head part of the water injection valve group of packing into, be screwed to again on the handle body, pass in φ 8 holes of designing on main body section rifle bar and the piston, liquid drugs injection directly stretches into the centre position of bit shank sleeve, and air tube is shorter than liquid drugs injection, only reaches piston microcephaly's 2/3 place; In bit shank when access,, liquid drugs injection directly links to each other with the drill steel centre bore, plays purge big gun hole, arranges the go out effect of dirt of powder.
Summary of the invention
Problem to be solved in the utility model is for overcoming above-mentioned technological deficiency, a kind of long service life is provided, the Wind pressure high speed rock drill of high efficiency.
In order to address the above problem, the utility model by the following technical solutions:
A kind of Wind pressure high speed rock drill comprises main body section, and an end of main body section is fixedly connected with chain-drive section, and the other end is fixedly connected with drive end unit;
Described main body section comprises cylinder body, and the outside of cylinder body is provided with noise damper, and the inside of cylinder body is provided with back-stop mechanism, distributing valve group near the position of drive end unit;
Described chain-drive section comprises the head body, is connected with turning set in the head body, and described cylinder interior is provided with piston near the position of chain-drive section;
Described piston one end is located at cylinder interior near the position of head body, and the other end is located in the turning set, and described piston is located at the diameter of close head body one end greater than the diameter that is located at an end in the turning set;
Be provided with the water injection valve group in the described drive end unit, described water injection valve group is provided with air tube, liquid drugs injection, and described air tube is sleeved on the liquid drugs injection outside, and described air tube, liquid drugs injection pass piston away from an end of water injection valve group and be located at external position near the piston smaller diameter end.
Below be the utility model for further improvement of these options:
Described liquid drugs injection length is 340mm, and air tube length is 309mm, and when piston extend out to range, the end position of described liquid drugs injection was apart from the end 10mm of piston minor diameter.
Further improve: piston is provided with rifle nut near the inside of drive end unit one end, and described piston and distributing valve group are in transmission connection by back-stop mechanism and rifle nut.
Further improve: described back-stop mechanism comprises ratchet, rifle bar, ratchet pawl and turriform spring, and described rifle bar and rifle nut are in transmission connection, and described rifle bar is provided with the semi arch that ratchet pawl is installed and the blind hole that the turriform spring is installed; The quantity of described ratchet pawl is four, and ratchet adopts close tooth papillae wheel.
Further improve: the end near piston on the described cylinder body is fixedly connected with fairlead, closely is connected with lining in the described fairlead, and fairlead and cylinder body adopt interference fit.
Further improve: the threaded one end of described turning set inside is connected with the spline mother, and the end away from the spline mother in the described turning set is fixedly connected with bit shank sleeve, and the outside of described head body is provided with the pricker mechanism for card near an end of bit shank sleeve.
Further improve: described bit shank sleeve comprises integrated fitting portion, protuberance, the external diameter of described fitting portion is less than the external diameter of protuberance, excircle direction along fitting portion is provided with some strip grooves, described fitting portion be fixedly connected with turning set in, protuberance is exposed at the outside of turning set; Described groove quantity is six, and groove is symmetrical arranged in twos along the excircle direction of fitting portion.
Further improve: described water injection valve group comprises the handle body, and the water injecting valve body in the handle body is provided with water injection valve in the described water injecting valve body, forms water-injecting cavity between described water injecting valve body and the water injection valve, and described water-injecting cavity is communicated with water pipe head by the inlet opening; End away from the water filling cavity in the described water injecting valve body is provided with the spring lid, is provided with spring between described spring lid and the water-injecting cavity.
Further improve: the end near water-injecting cavity on the described water injecting valve body is provided with the liquid drugs injection that is communicated with water-injecting cavity, the outside of described liquid drugs injection is set with air tube, described air tube is communicated with gas-tpe fitting by air inlet, described liquid drugs injection is fixedly connected with water injecting valve body by the liquid drugs injection pad, and described air tube is fixedly connected with water injecting valve body by the air tube pad.
Further improve: described piston is in transmission connection away from the spline mother that an end of cylinder body passes in fairlead and the turning set; The position of described handle external body lower-left side is provided with the pressure regulator valve group, and the water injection valve group is communicated with by air inlet with the handle body; The upper left side of described handle external body is provided with the operating valve group, and the upper right side is provided with gas-tpe fitting, the lower right side is provided with water pipe head, and described water pipe head is communicated with the water injection valve group, and gas-tpe fitting is communicated with the pressure regulator valve group.
When operating valve set places the enable possition, source of the gas is inputted by gas-tpe fitting, the handle intracoelomic cavity is full of calms the anger, air-flow enters the water injection valve group by air inlet, under the effect of air pressure, water injection valve B face pressurized withstands spring and goes ahead, air inlet on the water injection valve group is opened, water is in air inlet flows to liquid drugs injection, when water flows out in the liquid drugs injection, impact forward under the effect that air tube is calmed the anger, a part of water flows to rapidly the effect that cooling water is played in the gaps such as piston and turning set, and another part water flows in the bit shank sleeve by drill steel and plays the go out effect of dirt of purge big gun hole, row's powder.
The technical solution adopted in the utility model, because air tube and liquid drugs injection all are located at internal piston, the water of air tube ejection not only plays the go out effect of dirt of purge big gun hole, row's powder, and can the cooler head, when having guaranteed that hammer drill uses under 0.4-1.2 Mpa blast, the temperature of complete machine and key component is controlled at below 60 ℃, machine can work, improved the application life of hammer drill, realized simultaneously the leap of hammer drill from low blast to Wind pressure, made the operating efficiency of hammer drill improve 100%.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment;
Accompanying drawing 2 is the top view of accompanying drawing 1;
Accompanying drawing 3 is the structural representation of bit shank sleeve among the utility model embodiment;
Accompanying drawing 4 is the left view of accompanying drawing 3;
Accompanying drawing 5 is the enlarged drawing of drive end unit in the accompanying drawing 1.
Among the figure: the 1-drive end unit; The 2-main body section; The 3-chain-drive section; The 4-cylinder body; The 5-noise damper; The 6-ratchet; The 7-rifle bar; The 8-ratchet pawl; 9-turriform spring; 10-distributing valve group; The 11-piston; The 12-rifle nut; The 13-fairlead; 14-head body; The 15-turning set; The 16-bit shank sleeve; The 17-spline is female; 18-pricker mechanism for card; 19-handle body; 20-pressure regulator valve group; 21-water injection valve group; The 22-gas-tpe fitting; The 23-water pipe head; 24-operating valve group; The 25-air tube; The 26-liquid drugs injection; The 27-lining; The 28-air inlet; The 29-water injecting valve body; The 30-spring; 31-liquid drugs injection pad; 32-air tube pad; The 33-inlet opening; 34-spring lid; The 35-water injection valve; The 36-water-injecting cavity; The 161-fitting portion; The 162-protuberance; The 163-groove.
The specific embodiment
Embodiment, as shown in Figure 1 and Figure 2, a kind of Wind pressure high speed rock drill comprises main body section 2, and an end of main body section 2 is fixedly connected with chain-drive section 3, and the other end is fixedly connected with drive end unit 1.
Described main body section 2 comprises cylinder body 4, the outside of cylinder body 4 is provided with noise damper 5, the inside of cylinder body 4 is provided with back-stop mechanism, distributing valve group 10 near the position of drive end unit 1, cylinder body 4 inner positions near chain-drive section 3 are provided with piston 11, piston 11 is provided with rifle nut 12 near the inside of drive end unit 1 one ends, described piston 11 is in transmission connection by back-stop mechanism and rifle nut 12 with distributing valve group 10, and described drive end unit 1 comprises handle body 19, and the end away from cylinder body 4 in the described handle body 19 is provided with water injection valve group 21.
Described back-stop mechanism comprises that ratchet 6, rifle bar 7, ratchet pawl 8 and turriform spring 9 form, and described rifle bar 7 is in transmission connection with rifle nut 12, and described rifle bar 7 is provided with the semi arch that ratchet pawl 8 is installed and the blind hole that turriform spring 9 is installed.
The quantity of described ratchet pawl 8 is four, ratchet 6 adopts close tooth papillae wheel, stressed to be improved to four ratchet pawls 8 simultaneously stressed by an original ratchet pawl 8, thereby four claws that rifle bar 7 is contacted with ratchet 6 are stressed evenly, avoid the phenomenon that causes that rifle bar 7 claws rupture, ratchet 6 collapses tooth or ratchet pawl 8 fractures.
End near piston 11 on the described cylinder body 4 is fixedly connected with fairlead 13, the described fairlead 13 interior linings 27 that closely are connected with, fairlead 13 adopts interference fit with cylinder body 4, adopt forcing press that fairlead 13 is pressed in the cylinder body 4 during installation, lining 27 is used for preventing that piston 11 is with fairlead 13 wearing and tearing.
Described chain-drive section 3 comprises head body 14, be connected with turning set 15 in the head body 14, the threaded one end of turning set 15 inside is connected with spline mother 17, end away from spline mother 17 in the described turning set 15 is fixedly connected with bit shank sleeve 16, and the outside of described head body 14 is provided with pricker mechanism for card 18 near an end of bit shank sleeve 16;
As shown in Figure 3, Figure 4, described bit shank sleeve 16 comprises integrated fitting portion 161, protuberance 162, the external diameter of described fitting portion 161 is less than the external diameter of protuberance 162, excircle direction along fitting portion 161 is provided with some strip grooves 163, described fitting portion 161 be fixedly connected with turning set 15 in, protuberance 162 is exposed at the outside of turning set 15;
Described groove 163 quantity are six, and groove 163 is symmetrical arranged in twos along the excircle direction of fitting portion 161.
Such as Fig. 1, Fig. 2, shown in Figure 5, described water injection valve group 21 comprises the water injecting valve body 29 that is located in the handle body 19, be provided with water injection valve 35 in the described water injecting valve body 29, form water-injecting cavity 36 between described water injecting valve body 29 and the water injection valve 35, described water-injecting cavity 36 is communicated with water pipe head 23 by inlet opening 33; End away from water filling cavity 36 in the described water injecting valve body 29 is provided with spring lid 34, is provided with spring 30 between described spring lid 34 and the water-injecting cavity 36.
End near water-injecting cavity 36 on the described water injecting valve body 29 is provided with the liquid drugs injection 26 that is communicated with water-injecting cavity 36, the outside of described liquid drugs injection 26 is set with air tube 25, described air tube 25 is communicated with gas-tpe fitting 22 by air inlet 28, described liquid drugs injection 26 is fixedly connected with water injecting valve body 29 by liquid drugs injection pad 31, and described air tube 25 is fixedly connected with water injecting valve body 29 by air tube pad 32.
Described piston 11 passes fairlead 13 away from an end of cylinder body 4 and is in transmission connection with spline mother 17 in the turning set 15, described piston 11 places the diameter of ends in the cylinder body 4 greater than the diameter that places ends in the turning set 15, and described air tube 25, liquid drugs injection 26 pass piston 11 away from an end of water injecting valve body 29 and be located at external position near piston smaller diameter end end.
Described liquid drugs injection 26 length are 340mm, and air tube 25 length are 309mm, and when piston 11 extend out to range, an end of described liquid drugs injection 26 close piston smaller diameter end was 10mm apart from the end of piston 11 smaller diameter end.
The position of described handle body 19 external left downsides is provided with pressure regulator valve group 20, and water injection valve group 21 is communicated with by air inlet 28 with handle body 19.
The upper left side of described handle body 19 outsides is provided with operating valve group 24, the upper right side is provided with gas-tpe fitting 23, the lower right side is provided with water pipe head 22, described water pipe head 23 is communicated with water injection valve group 21, gas-tpe fitting 22 is communicated with operating valve set 20, the teamwork of described pressure regulator valve group 20, water injection valve group 21, operating valve group 24 control hammer drill operating air pressure, air leg flexible and hammer drill open and close and the operation such as blow by force.
During work, on water injection valve group 21 and handle body 19 inner chambers, all be provided with the air inlet 28 that is interconnected, be provided with the air inlet that communicates with water pipe head 23 in water injection valve group 21 and handle body 19 inner chambers.When operating valve set places the enable possition, source of the gas is by gas-tpe fitting 22 inputs, handle body 19 inner chambers are full of calms the anger, air-flow enters water injection valve group 21 by air inlet 28, under the effect of air pressure, water injection valve B face pressurized withstands spring and goes ahead, 21 air inlet is opened on the water injection valve group, water is in air inlet flows to liquid drugs injection 26, when water during from liquid drugs injection 26 interior outflow, impact forward under the effect that air tube 25 is calmed the anger, a part of water flows to rapidly the effect that cooling water is played in the gaps such as piston 11 and turning set 15, and another part water flows in the bit shank sleeve 16 and plays purge big gun hole by drill steel, the go out effect of dirt of row's powder.
The utility model adopts technique scheme to have the following advantages: because air tube 25, liquid drugs injection 26 all is located at piston 11 inside, the water part of liquid drugs injection 26 ejections enters the drill steel centre bore and is used for flushing rock drilling big gun hole, part water flows in bit shank sleeve 16 upper grooves and is refracted to head body 14 front ends, for anti-sealing slave head body 14 front ends directly spray, bit shank sleeve 16 is provided with protuberance 162 and is used for the impact force that buffered water sprays forward, part water is kept off back the front end of head body 14, be used for cooling machine head body 14, piston 11, chain-drive section 3 and turning set 15, indirectly cool off friction member spline female 17 and rifle nut 12, a part of water sprays along groove.The front end of head body 14 is in always water state, thereby has formed the cooling system of hammer drill, no matter hammer drill work how long, the temperature of head body 14 is basically identical, remains on about 20 ℃-30 ℃ always.Like this, the rifle nut in the hammer drill 12, spline mother 17 can not reduce application life because of long term high temperature yet.
Claims (10)
1. a Wind pressure high speed rock drill comprises main body section (2), and an end of main body section (2) is fixedly connected with chain-drive section (3), and the other end is fixedly connected with drive end unit (1);
Described main body section (2) comprises cylinder body (4), and the outside of cylinder body (4) is provided with noise damper (5), and the inside of cylinder body (4) is provided with back-stop mechanism, distributing valve group (10) near the position of drive end unit (1);
Described chain-drive section (3) comprises head body (14), is connected with turning set (15) in the head body (14), and described cylinder body (4) inside is provided with piston (11);
It is characterized in that:
Described piston (11) one ends are located at the inner position near head body (14) of cylinder body (4), and the other end is located in the turning set (15);
Described piston (11) is located at the diameter of close head body (14) one ends greater than the diameter that is located at turning set (15) one ends, is provided with water injection valve group (21) in the described drive end unit (1);
Described water injection valve group (21) is provided with air tube (25), liquid drugs injection (26), described air tube (25) is sleeved on liquid drugs injection (26) outside, and described air tube (25), liquid drugs injection (26) pass piston (11) away from an end of water injection valve group (21) and be located at external position near piston (11) smaller diameter end.
2. a kind of Wind pressure high speed rock drill according to claim 1 is characterized in that:
Described liquid drugs injection (26) length is 340mm, and air tube (25) length is 309mm, and piston (11) is when extending out to range, and microcephaly's end position of described liquid drugs injection (26) is apart from the end 10mm of piston (11) minor diameter.
3. a kind of Wind pressure high speed rock drill according to claim 1 is characterized in that:
Piston (11) is provided with rifle nut (12) near the inside of drive end unit (1) one end, and described piston (11) is in transmission connection by back-stop mechanism and rifle nut (12) with distributing valve group (10).
4. a kind of Wind pressure high speed rock drill according to claim 3 is characterized in that:
Described back-stop mechanism comprises ratchet (6), rifle bar (7), ratchet pawl (8) and turriform spring (9), described rifle bar (7) is in transmission connection with rifle nut (12), and described rifle bar (7) is provided with the semi arch that ratchet pawl (8) is installed and the blind hole that turriform spring (9) is installed; The quantity of described ratchet pawl (8) is four, and ratchet (6) adopts close tooth papillae wheel.
5. a kind of Wind pressure high speed rock drill according to claim 4 is characterized in that:
The upper end near piston (11) of described cylinder body (4) is fixedly connected with fairlead (13), closely is connected with lining (27) in the described fairlead (13), and fairlead (13) adopts interference fit with cylinder body (4).
6. a kind of Wind pressure high speed rock drill according to claim 5 is characterized in that:
The inner threaded one end of described turning set (15) is connected with spline mother (17), end away from spline female (17) in the described turning set (15) is fixedly connected with bit shank sleeve (16), and the outside of described head body (14) is provided with pricker mechanism for card (18) near an end of bit shank sleeve (16).
7. a kind of Wind pressure high speed rock drill according to claim 6 is characterized in that:
Described bit shank sleeve (16) comprises integrated fitting portion (161), protuberance (162), the external diameter of described fitting portion (161) is less than the external diameter of protuberance (162), excircle direction along fitting portion (161) is provided with some strip grooves (163), described fitting portion (161) be fixedly connected with turning set (15) in, protuberance (162) is exposed at the outside of turning set (15); Described groove (163) quantity is six, and groove (163) is symmetrical arranged in twos along the excircle direction of fitting portion (161).
8. a kind of Wind pressure high speed rock drill according to claim 7 is characterized in that:
Described water injection valve group (21) comprises handle body (19), water injecting valve body (29) in the handle body (19), be provided with water injection valve (35) in the described water injecting valve body (29), form water-injecting cavity (36) between described water injecting valve body (29) and the water injection valve (35), described water-injecting cavity (36) is communicated with water pipe head (23) by inlet opening (33); End away from water filling cavity (36) in the described water injecting valve body (29) is provided with spring lid (34), is provided with spring (30) between described spring lid (34) and the water-injecting cavity (36).
9. a kind of Wind pressure high speed rock drill according to claim 8, it is characterized in that: the upper end near water-injecting cavity (36) of described water injecting valve body (29) is provided with the liquid drugs injection (26) that is communicated with water-injecting cavity (36), the outside of described liquid drugs injection (26) is set with air tube (25), described air tube (25) is communicated with gas-tpe fitting (22) by air inlet (28), described liquid drugs injection (26) is fixedly connected with water injecting valve body (29) by liquid drugs injection pad (31), and described air tube (25) is fixedly connected with water injecting valve body (29) by air tube pad (32).
10. a kind of Wind pressure high speed rock drill according to claim 9 is characterized in that: described piston (11) passes fairlead (13) away from an end of cylinder body (4) and is in transmission connection with spline female (17) in the turning set (15); The position of described handle body (19) external left downside is provided with pressure regulator valve group (20), and water injection valve group (21) is communicated with by air inlet (28) with handle body (19); The outside upper left side of described handle body (19) is provided with operating valve group (24), the upper right side is provided with gas-tpe fitting (22), the lower right side is provided with water pipe head (23), described water pipe head (23) is communicated with water injection valve group (21), and gas-tpe fitting (22) is communicated with pressure regulator valve group (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220445427 CN202810644U (en) | 2012-09-04 | 2012-09-04 | Medium-wind pressure high-speed rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220445427 CN202810644U (en) | 2012-09-04 | 2012-09-04 | Medium-wind pressure high-speed rock drill |
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| Publication Number | Publication Date |
|---|---|
| CN202810644U true CN202810644U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220445427 Expired - Fee Related CN202810644U (en) | 2012-09-04 | 2012-09-04 | Medium-wind pressure high-speed rock drill |
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| CN (1) | CN202810644U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839914A (en) * | 2012-09-04 | 2012-12-26 | 潍坊天瑞重工凿岩机械有限公司 | Intermediate wind pressure high-speed rock drilling machine |
| CN104018778A (en) * | 2014-04-30 | 2014-09-03 | 罗亮光 | Oil-mist-free energy-saving and low-consumption pusher leg drill |
-
2012
- 2012-09-04 CN CN 201220445427 patent/CN202810644U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839914A (en) * | 2012-09-04 | 2012-12-26 | 潍坊天瑞重工凿岩机械有限公司 | Intermediate wind pressure high-speed rock drilling machine |
| CN102839914B (en) * | 2012-09-04 | 2013-08-14 | 潍坊天瑞重工凿岩机械有限公司 | Intermediate wind pressure high-speed rock drilling machine |
| CN104018778A (en) * | 2014-04-30 | 2014-09-03 | 罗亮光 | Oil-mist-free energy-saving and low-consumption pusher leg drill |
| CN104018778B (en) * | 2014-04-30 | 2016-07-06 | 罗亮光 | Without mist of oil, energy-conservation, low consumption pusher leg drill |
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| 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: 20130320 Termination date: 20190904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |