CN106368702B - A kind of mining hand-held all-hydraulic drill based on inner curve motor - Google Patents
A kind of mining hand-held all-hydraulic drill based on inner curve motor Download PDFInfo
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- CN106368702B CN106368702B CN201610842474.XA CN201610842474A CN106368702B CN 106368702 B CN106368702 B CN 106368702B CN 201610842474 A CN201610842474 A CN 201610842474A CN 106368702 B CN106368702 B CN 106368702B
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- 238000005065 mining Methods 0.000 title claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 40
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000003993 interaction Effects 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 19
- 239000003921 oil Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000000839 emulsion Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 241000219098 Parthenocissus Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/22—Hand tools or hand-held power-operated tools specially adapted for dislodging minerals
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
- Hydraulic Motors (AREA)
Abstract
The invention discloses a kind of mining hand-held all-hydraulic drills based on inner curve motor, including body upper shell, underpart shell, overflow throttle valve, holding rod, adjust arm, oil distribution casing, multiple-action inner curved radial motor, speed increaser, drilling rod, drill bit.High pressure oil enters multiple-action inner curved radial motor through overflow throttle valve by the oil inlet of body upper shell by oil distribution casing, piston and crossbeam inside the multiple-action inner curved radial motor of high pressure oil promotion press to the inner curve surface of stator, idler wheel is located on crossbeam, directly it is in contact with the inner curve surface of stator, and axial force is generated by interaction, drive rotor rotates, and then drives the drilling rod rotary work connected by speed increaser and then drill bit is driven to reach drilling purpose.This kind of mining hand held hydraulic drill have many advantages, such as stress balance, drilling machine holding rod are easily held, torque is big, it is all-hydraulic operation, being capable of speed governing commutation, overload protection.
Description
Technical field
The present invention relates to mining equipment technical fields, and in particular to a kind of mining hand-held all-hydraulic based on inner curve motor
Drilling machine.
Background technology
Mining hand-held drill is mainly used in coal mine excavation, caving blast hole, bolthole, gas drainage under suction and detection
The minor diameters engineerings such as water hole, water injection hole, coal rock layer reinforcing or fire extinguishing injected hole are visited in hole.To adapt to national safety of coal mines life
The needs of production, coal mine down-hole drilling machinery are put into mining product safety sign management, are hurted sb.'s feelings with the machinery for reducing bore operation
Safety accident, it is ensured that coal mine down-hole drilling engineering safety.
The mining hand-held small-sized drill in original China has electric coal drill and wind coal borer, since mining hand-held drill is used for underground coal mine
And have in surrounding medium in the environment of the explosive mixed gas such as methane, coal dust, from safety considerations, there is safety in electric coal drill
Hidden danger；Wind coal borer boring capacity is small, and volume is big, and noise is big, and work generation dust is big, and working environment is severe, manual operation wind
Coal borer is more difficult.
Consider above-mentioned reason, in recent years, occurring using hand-held small mining drilling machine of the hydraulic pressure for power source, which bores
Owner will use the driving structure of gear type motor and cycloid hydraulic motor, motor force unbalance, drilling machine when hand-manipulated
Holding rod is not easy to hold, and great difficulty is brought to on-site manual operation.
By patent retrieval, there are following known technical solutions：
Patent 1：
Application number：CN201510127210.1, the applying date：2015.03.20 authorized announcement date：2015.06.24, this hair
It is bright to disclose a kind of comprehensive crawler type hydraulic drilling rig of coal mine, including creeper undercarriage and drilling host, the drilling master
Machine includes power head and power head rack, and the front end of the creeper undercarriage is provided with support post, on the support post
The hydraulic swivel head mechanism for driving power head gantry rotation is provided with, driving rack is additionally provided in the power head rack and is moved up and down
Dynamic lift cylinder and the propelling cylinder of driving power head forward-reverse.The present invention overcomes the deficiencies in the prior art, can
It rotates power head rack any angle in horizontal plane and vertical plane, realizes the comprehensive any angle adjustment of drill hole of drilling machine,
Outstanding advantage is shown when construction raises up hole and lower inclined hole, upright opening.
Patent 2：
Application number：CN200420059779.6, the applying date：2004.05.21 authorized announcement date：2005.05.18, this reality
A kind of hand-held hydraulic drilling rig for mining is disclosed with novel, including hydraulic motor, drilling rod, drill rod sleeve, control crank, switching on and shutting down
Structure, the hydraulic motor are cam planet gear motor, which connect with the drill rod sleeve, in motor front and rear cover
On be provided with fuel inlet fitting block and back leakage connection block, the oil inlet pipe of the fuel inlet fitting block and motor connects, and the oil return connects
The oil return line of head block and motor connects, and drill control valve is also equipped in fuel inlet fitting block, the switching mechanism control should
The opening and closing of drill control valve.This drilling machine need not slow down mechanism, greatly reduce the structure size and weight of drilling machine；It adopts
It is designed with hollow shaft, greatly reduces drilling machine axial dimension；It is front and rear to be mounted on drill rod sleeve, it can be realized positive and negative with double-side operation
Turn to connect with distinct interface, it is more convenient to use, while coal mine can be used by the use of high-water-based emulsion as work in the drilling machine
Medium can also use mineral oil as working media.
Patent 3：
Application number：CN201210230151.7, the applying date：2012.07.05 authorized announcement date：2014.01.22, this hair
It is bright to disclose a kind of mining guide rail type emulsified liquid hydraulic drilling rig.The emulsion hydraulic drilling machine include guide rail open frame, propulsion device,
Power plant, drilling equipment, maneuver control device are working media using high-water-based emulsion, with non-circular planetary gear tying
Configuration formula emulsion motor does power source；The gear for being provided with fast, slow two-stage speed change is taken to increase speed adjustable range simultaneously, is matched
There is simple and effective wet type drilling operation way of supplying water, spline connection, jackshaft is selected to transmit, efficient vibration-damping pad circle measure abatement is inhaled
Drilling axial vibration power is received to multinomial innovative technology structural measures such as emulsion motor transmission, in coal road, coal rock tunnel, coal mining
Various drilling operations are carried out in work surface, with output torque is big, low-speed performance is good, bearing capacity is strong, operation quality is high, applicable
Range extensively waits prominent technical characteristic, can obtain and improve production efficiency, reduces labor intensity, and the multiple economy such as eliminate safe hidden trouble
Benefit and social benefit.
Through the above search, it has been found that above technical scheme does not influence the novelty of the present invention；And Yi Shang patent text
The intercombination of part is without destroying creativeness of the invention.
Invention content
(1) the technical issues of solving
The technical problems to be solved by the invention are mining to overcome there is provided a kind of mining hand-held seven-star wheel hydraulic drill rig
There are security risks for electric coal drill in electric drill, and wind coal borer boring capacity is small, and volume is big, and noise is big, and work generation dust is big, work
Bad environments, manual operation wind coal borer are more difficult；Using gear type motor and cycloid hydraulic motor as driving structure
Hand drill, motor force unbalance, drilling machine holding rod is not easy to hold when hand-manipulated, and great difficulty is brought to on-site manual operation
The problem of.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：A kind of ore deposit based on inner curve motor
With hand-held all-hydraulic drill, including body upper shell, underpart shell, holding rod, left end cap, right end cap, shaft coupling, drilling rod
And drill bit, further include multiple-action inner curved radial motor；
The body upper shell has upper cover without bottom structure to be hollow, and the underpart shell has bottom without upper cover to be hollow
Structure, the body upper shell are fixedly connected with underpart shell by washer with bolt, and the connection of the two inner cavity is one
It is whole；
It is covered in the body upper cover top portion and is equipped with oil inlet and oil outlet, under the body upper shell and body
Multiple-action inner curved radial motor is connected in portion's shell；
The multiple-action inner curved radial motor includes housing, pintle, flow ring, deep groove ball bearing, rotor, horizontal stroke
Beam, idler wheel, taper roll bearing, stator and piston；Bottom has been bolted to connection left end in the underpart shell
Lid, the left end cap have been bolted to connection housing, and the housing is connected with stator, and the stator is in disc
Cavity body structure by deep groove ball bearing is connected with pintle at the axial location of middle part, and inner cavity is connected with rotor；
The pintle is connected with flow ring, and the rotor is connected by taper roll bearing and left end cap；The rotor
Piston cylinder holes is equipped with, is connected with piston in the piston cylinder holes, the piston is connected with crossbeam, and the crossbeam symmetrically connects
It connects there are two idler wheel, the idler wheel contacts compression connection with bore of stator；
The left end cap has been bolted to connection right end cap, and the right end cap is fixed by shaft coupling clamping screw to be connected
Shaft coupling is connected to, the output shaft of the rotor is connected with drilling rod by shaft coupling, and the drilling rod is fixedly connected with drill bit.
Further, the body upper outer casing upper cover is equipped with threaded hole, and the threaded hole is matched with pintle.
Further, the crossbeam is connected with piston contact, and both ends are connected with idler wheel, the rolling by needle bearing
Wheel contacts compression connection with the inner curve surface of stator.
Further, the cavity shape and size of the body upper shell and underpart shell with it is multiple-action inner curved
The outer shape and size of radial motor are adapted.
Further, the body upper shell medial side face is arranged with two holding rods.
(3) advantageous effect
The present invention provides a kind of mining hand-held all-hydraulic drill based on inner curve motor, using multiple-action inner curved diameter
There is driving mechanism to hydraulic motor as hand held hydraulic drill stress balance, drilling machine holding rod easily to hold, torque is big, peace
The advantages that property is high entirely.
Description of the drawings
Fig. 1 is the mining hand held hydraulic drill schematic diagram based on multiple-action inner curved radial motor；
Fig. 2 is the mining hand held hydraulic drill three-dimensional detonation configuration figure based on multiple-action inner curved radial motor；
Fig. 3 is multiple-action inner curved radial motor mounted inside figure；
Fig. 4 is multiple-action inner curved radial motor structure diagram.
In figure：
1st, oil inlet；2nd, body upper shell；3rd, holding rod；4th, multiple-action inner curved radial motor, 401, housing,
402nd, pintle, 403, flow ring, 404, deep groove ball bearing, 405, rotor, 406, crossbeam, 407, idler wheel, 408, taper roller
Bearing, 409, stator, 410, piston；5th, left end cap；6th, right end cap；7th, shaft coupling；8th, underpart shell；9th, drilling rod；10th, it bores
Head；11st, oil outlet.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention,
Technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
All other embodiments obtained under the premise of creative work, shall fall within the protection scope of the present invention.
With reference to shown in Fig. 1~Fig. 4, structural relation is：Including body upper shell 2, underpart shell 8, holding rod 3,
Left end cap 5, right end cap 6, shaft coupling 7, drilling rod 9 and drill bit 10 further include multiple-action inner curved radial motor 4；
Body upper shell 2 has upper cover without bottom structure to be hollow, and underpart shell 8 has bottom without superstructure to be hollow,
Body upper shell 2 is fixedly connected with underpart shell 8 by washer with bolt, and the connection of the two inner cavity is an entirety；
2 top cover of body upper shell is equipped with oil inlet 1 and oil outlet 11, body upper shell 2 and underpart
Multiple-action inner curved radial motor 7 is connected in shell 8；
The multiple-action inner curved radial motor 4 includes housing 401, pintle 402, flow ring 403, deep-groove ball axis
Hold 404, rotor 405, crossbeam 406, idler wheel 407, taper roll bearing 408, stator 409 and piston 410；Outside the underpart
Bottom has been bolted to connection left end cap 5 in shell 8, and the left end cap 5 has been bolted to connection housing 401, described
Housing 401 is connected with stator 409, and the stator 409 is disc hollow cavity structure, is passed through at the axial location of middle part
Deep groove ball bearing 403 is connected with pintle 402, and inner cavity is connected with rotor 405；The pintle 402 is connected
There is flow ring 403, the rotor 405 is connected by taper roll bearing 408 and left end cap 5；The rotor 405 is equipped with
Piston cylinder holes is connected with piston 410 in the piston cylinder holes, and the piston 410 is connected with crossbeam 406, the crossbeam 406
Two idler wheels 407 are symmetrically connected with, the idler wheel 407 is compressed with 409 lumen contact of stator and connected；Multiple-action inner curved radial direction liquid
Deep groove ball bearing 404 in pressure motor 4 is matched with one end of rotor 405, and is passed through housing 401 and axially fastened；Taper roller
Bearing 408 is matched with the other end of rotor 405, and is passed through left end cap 5 and axially fastened；Deep groove ball bearing 404 and taper roller
Bearing 408 supports the rotary motion of rotor 405 jointly.
The left end cap 5 has been bolted to connection right end cap 6, and the right end cap 6 is consolidated by shaft coupling clamping screw
Surely shaft coupling 7 is connected with, the output shaft of the rotor 405 is connected with drilling rod 9 by shaft coupling 7, and the drilling rod 9 is fixedly connected with
Drill bit 10.
Preferably, 2 upper cover of body upper shell is equipped with threaded hole, and threaded hole is matched with pintle 402, plays miniflow tune
Speed effect, while fixed pintle 402 makes it that axial runout not occur；Flow ring 403 is matched with pintle 402, flow ring
403 can be enlarged flow stroke, while the oil inlet and oil return for meeting piston 410 is coordinated.
Preferably, crossbeam 406 and piston 410 connect, and both ends are connected with idler wheel 407 by needle bearing, rolling
Wheel 407 contacts compression connection with the inner curve surface of stator 409；The inner curve surface of idler wheel and stator forms rolling friction.
Preferably, the cavity shape and size of body upper shell 2 and underpart shell 8 and multiple-action inner curved radial direction
The outer shape and size of hydraulic motor 4 are adapted.
Preferably, 2 medial side face of body upper shell is arranged with two holding rods 3.
When specifically used, height is provided to multiple-action inner curved radial motor 4 by oil inlet 1 by pintle 402
Pressure oil, when 410 bottom of piston oil-distribution port in 405 rotation process of rotor respectively with the oil inlet duct of flow ring 403, oil return
When duct communicates, high pressure oil pushes crossbeam 406 and piston 410 to press to the inner curve surface of stator 409, and idler wheel 407 is located at crossbeam
It on 406, is directly in contact with the inner curve surface of stator 409, by mutual between the inner curve surface of idler wheel 407 and stator 409
Effect generates axial force, so as to which drive rotor 405 rotates；The rotation of rotor 405 drives drilling rod 10 to rotate, and then revolve drill bit 11
It is conveyed to the purpose of drilling.
To sum up, the embodiment of the present invention has the advantages that：Using multiple-action inner curved radial motor as hand
The driving mechanism of hydraulic drill rig is held, has many advantages, such as that stress balance, drilling machine holding rod are easily held, torque is big, safe.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this practical relationship or sequence.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
Also there are other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example modifies or carries out equivalent replacement to which part technical characteristic；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (5)
1. a kind of mining hand-held all-hydraulic drill based on inner curve motor, including body upper shell (2), underpart shell
(8), holding rod (3), left end cap (5), right end cap (6), shaft coupling (7), drilling rod (9) and drill bit (10), it is characterised in that：It further includes
Multiple-action inner curved radial motor (4)；
The body upper shell (2) has upper cover without bottom structure to be hollow, and the underpart shell (8) has the bottom supreme to be hollow
Lid structure, the body upper shell (2) are fixedly connected with underpart shell (8) by washer with bolt, and the two inner cavity connects
Lead to for an entirety；
Body upper shell (2) top cover is equipped with oil inlet (1) and oil outlet (11), the body upper shell
(2) and in underpart shell (8) it is connected with multiple-action inner curved radial motor (7)；
The multiple-action inner curved radial motor (4) includes housing (401), pintle (402), flow ring (403), zanjon
Ball bearing (404), rotor (405), crossbeam (406), idler wheel (407), taper roll bearing (408), stator (409) and piston
(410)；The interior bottom of the underpart shell (8) has been bolted to connection left end cap (5), and the left end cap (5) passes through
Bolt is fixedly connected with housing (401), and the housing (401) is connected with stator (409), and the stator (409) is disk
Shape hollow cavity structure by deep groove ball bearing (403) is connected with pintle (402), inner cavity at the axial location of middle part
It is connected with rotor (405)；The pintle (402) is connected with flow ring (403), and the rotor (405) passes through circle
Taper roller bearing (408) is connected with left end cap (5)；The rotor (405) is equipped with piston cylinder holes, in the piston cylinder holes
Piston (410) is connected with, the piston (410) is connected with crossbeam (406), and the crossbeam (406) is symmetrically connected with two
Idler wheel (407), the idler wheel (407) compress with stator (409) lumen contact and connect；
The left end cap (5) has been bolted to connection right end cap (6), and the right end cap (6) passes through shaft coupling clamping screw
Shaft coupling (7) is fixedly connected with, the output shaft of the rotor (405) is connected with drilling rod (9), the drilling rod by shaft coupling (7)
(9) it is fixedly connected with drill bit (10).
2. a kind of mining hand-held all-hydraulic drill based on inner curve motor according to claim 1, it is characterised in that：Institute
Body upper shell (2) upper cover is stated equipped with threaded hole, the threaded hole is matched with pintle (402).
3. a kind of mining hand-held all-hydraulic drill based on inner curve motor according to claim 1, it is characterised in that：Institute
It states crossbeam (406) and piston (410) connects, both ends are connected with idler wheel (407), the idler wheel by needle bearing
(407) compression connection is contacted with the inner curve surface of stator (409).
4. a kind of mining hand-held all-hydraulic drill based on inner curve motor according to claim 1, it is characterised in that：Institute
State the cavity shape of body upper shell (2) and underpart shell (8) and size and multiple-action inner curved radial motor
(4) outer shape and size is adapted.
5. a kind of mining hand-held all-hydraulic drill based on inner curve motor according to claim 1, it is characterised in that：Institute
It states body upper shell (2) medial side face and is arranged with two holding rods (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610842474.XA CN106368702B (en) | 2016-09-22 | 2016-09-22 | A kind of mining hand-held all-hydraulic drill based on inner curve motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610842474.XA CN106368702B (en) | 2016-09-22 | 2016-09-22 | A kind of mining hand-held all-hydraulic drill based on inner curve motor |
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| Publication Number | Publication Date |
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| CN106368702A CN106368702A (en) | 2017-02-01 |
| CN106368702B true CN106368702B (en) | 2018-06-08 |
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| CN201610842474.XA Active CN106368702B (en) | 2016-09-22 | 2016-09-22 | A kind of mining hand-held all-hydraulic drill based on inner curve motor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107824838B (en) * | 2017-11-17 | 2019-09-06 | 安徽理工大学 | A kind of handheld portable hydraulic boring unit based on double rocker mechanism |
| CN109630111A (en) * | 2019-01-24 | 2019-04-16 | 滕州市金达煤炭有限责任公司 | A kind of coal mining hand-held electric coal drill |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3901330A (en) * | 1973-11-21 | 1975-08-26 | Brown Oil Tools | Electric power drive assembly |
| CN2700560Y (en) * | 2004-05-21 | 2005-05-18 | 张立刚 | Hand-held hydraulic drilling rig for mining |
| CN2931752Y (en) * | 2006-06-07 | 2007-08-08 | 苏心照 | Hand-held water injection type coal seam drill for exploring water |
| CN202326003U (en) * | 2011-11-21 | 2012-07-11 | 宁波德辰液压科技有限公司 | Multiple-function inner curve type radial plunger hydraulic motor |
| CN103711433A (en) * | 2013-12-24 | 2014-04-09 | 贵州永润煤业有限公司 | Roadheader-mounted hydraulic drilling rig |
-
2016
- 2016-09-22 CN CN201610842474.XA patent/CN106368702B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3901330A (en) * | 1973-11-21 | 1975-08-26 | Brown Oil Tools | Electric power drive assembly |
| CN2700560Y (en) * | 2004-05-21 | 2005-05-18 | 张立刚 | Hand-held hydraulic drilling rig for mining |
| CN2931752Y (en) * | 2006-06-07 | 2007-08-08 | 苏心照 | Hand-held water injection type coal seam drill for exploring water |
| CN202326003U (en) * | 2011-11-21 | 2012-07-11 | 宁波德辰液压科技有限公司 | Multiple-function inner curve type radial plunger hydraulic motor |
| CN103711433A (en) * | 2013-12-24 | 2014-04-09 | 贵州永润煤业有限公司 | Roadheader-mounted hydraulic drilling rig |
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| Publication number | Publication date |
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| CN106368702A (en) | 2017-02-01 |
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