CN106939764A - A kind of hydraulic shock unit head - Google Patents
A kind of hydraulic shock unit head Download PDFInfo
- Publication number
- CN106939764A CN106939764A CN201710219296.XA CN201710219296A CN106939764A CN 106939764 A CN106939764 A CN 106939764A CN 201710219296 A CN201710219296 A CN 201710219296A CN 106939764 A CN106939764 A CN 106939764A
- Authority
- CN
- China
- Prior art keywords
- accumulator
- housing
- cylinder body
- unit head
- hydraulic shock
- 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.)
- Pending
Links
- 230000035939 shock Effects 0.000 title claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000010985 leather Substances 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 206010008469 Chest discomfort Diseases 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The invention discloses a kind of hydraulic shock unit head, it is related to impact drill manufacture field, it is related specifically to a kind of hydraulic shock unit head, including the beater mechanism being sequentially connected, rotating mechanism, Fan Da mechanisms, it is provided with the outside of the beater mechanism on changement, the rotating mechanism and 2 motors one is at least installed and at least 1 motor two can be installed additional, its is simple in construction, split type connection, is readily transported, and reduces limitation of the territorial environment to impact drill.
Description
Technical field
Field is manufactured the present invention relates to impact drill, a kind of hydraulic shock unit head is related specifically to.
Background technology
It is complex formation the characteristics of front axle beam, harbour, water conservancy, high building project are constructed, aperture is increased, depth adds
Deep, for layer of sand, ovum gravel bed, erratic boulder layer and basement rock, percussion drilling is one of maximally effective drilling method, mechanical work efficiency compared with
Height, it is profitable.And hydraulic cylinder impact is small, easy to operate, laborsaving with stable working, noise, can step-less adjustment stroke and jig frequency,
Can overload protection and can realizing the hydraulicdriven advantage such as automatically control, even more obtain large range of use.But it is due to liquid
Pressure dynamic impact problem head volume is larger, complex structure, to the transport of impact drill and using larger inconvenience is brought, limits impact drill
Use scope.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of hydraulic shock unit head, its is simple in construction, split type connection,
It is readily transported, reduces limitation of the territorial environment to impact drill.
The technical solution adopted for the present invention to solve the technical problems：A kind of hydraulic shock unit head, including be sequentially connected
Beater mechanism, rotating mechanism, Fan Da mechanisms, it is characterised in that changement, the rotation are installed on the outside of the beater mechanism
One motor one is at least installed on rotation mechanism and at least one motor two can be installed additional.
Preferably, the beater mechanism includes the middle cylinder body integrated with the changement and described middle cylinder body one end
The upper cylinder body of connection, the piston inside the middle cylinder body and the upper cylinder body, the middle cylinder body other end and the rotation
Mechanism is connected.
Preferably, the rotating mechanism includes be connected with the middle cylinder body bonnet, it is connected with the bonnet and distinguishes
The housing, the protecgulum being connected with housing, a part for being provided with motor one and motor two are penetrated by the connection bonnet, the housing
The splined shaft in cavity constituted with the protecgulum, described splined shaft another part passes through the Fan Da mechanisms；The bonnet with
Small bearing bracket is provided between the splined shaft, rear copper sheathing, the splined shaft are provided between the small bearing bracket and the splined shaft
Provided with the spline housing being connected with the small bearing bracket between the housing, the protecgulum, the spline housing rear end and the shell
Gear wheel is provided between body, big bearing block is provided between the spline housing front end and the protecgulum.
Preferably, the Fan Da mechanisms include being connected with protecgulum anti-crust breaking body, it is arranged on the anti-enclosure interior of beating
Preceding copper sheathing, described splined shaft another part passes through the anti-crust breaking body and the preceding copper sheathing, the anti-crust breaking body and the spline
Butterfly spring is provided between axle and is located at the packing ring at the butterfly spring both ends.
Preferably, the middle cylinder body both sides are separately installed with accumulator one and accumulator two, the accumulator one include with
The connected base of accumulator one in the middle cylinder body side, the accumulator one being connected with the base of accumulator one are covered, the accumulation of energy
The leather cup one that is set on the base of device one, the accumulator one cover the nitrogen injection valve one being provided with, the accumulator two include with
The connected base of accumulator two of the middle cylinder body opposite side, the accumulator two being connected with the base of accumulator two are covered, the storage
The leather cup two that can set on the base of device two, the accumulator two cover the nitrogen injection valve two being provided with.
Preferably, the changement is arranged on side in the middle cylinder body, and the changement is included in the commutation shell
Provided with the valve body and valve pocket fitted together, bonnet also is installed including the commutation shell end.
Preferably, the motor one is fixed on the side end face of housing one, and the output shaft of the motor one stretches into described
Enclosure interior is simultaneously engaged with the inner ring gear of gear one, and bearing one is provided between the front end of gear one and the housing, is located at
The bearing cap one for positioning bearing one is provided with positioned at another side end face of the housing.
Preferably, the motor two is fixed on another side end face of the housing, and the output shaft of the motor two stretches into institute
State enclosure interior and engaged with the inner ring gear of gear two, bearing two, position are provided between the front end of gear two and the housing
In being provided with the bearing cap two that positions bearing two positioned at another side end face of the housing.
Preferably, the outer ring gear of the gear one and the gear two is engaged with the gear wheel.
Present invention has the advantages that, removably it is fixedly connected mode and causes the convenient dismounting of the present invention, is easy to transport and ties up
Shield；Accumulator one is installed on middle cylinder body, drill bit impact power is further improved；It may be selected to set two, three or more motors,
Power is big, and drilling resultses are good；The present invention uses hydraulic transmission mode to provide power for rig, and it is only pneumatic brill to complete same operation
The half of machine shortens drilling time to 1/3rd or so, improves penetration rate；It is applied widely；Dust cap is set, effectively
Avoid in drilling process, dust enters inside impact drill, causes overall failure, reduction of service life；Workload is reduced, is improved
Operating efficiency；
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of hydraulic shock unit head top view of the invention.
Fig. 2 is a kind of hydraulic shock unit head profile of the invention.
Fig. 3 is a kind of hydraulic shock unit head profile of the invention.
In accompanying drawing：
1st, beater mechanism 11, changement 111, valve body
112nd, commutation housing 113, valve pocket 114, bonnet
12nd, middle cylinder body 13, upper cylinder body 14, piston
15th, accumulator 1, the base 152 of accumulator one, accumulator one are covered
153rd, leather cup 1, nitrogen injection valve 1, accumulator two
161st, the base 162 of accumulator two, the lid 163 of accumulator two, leather cup two
164th, nitrogen injection valve 22, rotating mechanism 20, gear wheel
21st, bonnet 22, motor 1, motor two
24th, housing 25, protecgulum 26, splined shaft
27th, small bearing bracket 28, rear copper sheathing 29, big bearing block
221st, gear 1, bearing 1, bearing cap one
231st, gear 1, bearing 2 222, bearing cap two
3rd, Fan Da mechanisms 31, anti-crust breaking body 32, preceding copper sheathing
33rd, butterfly spring 34, packing ring
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Fig. 1 is the top view of the present invention, and Fig. 2 is the profile in Figure 1A-A directions, and Fig. 3 is the profile in Figure 1B-B directions.
As illustrated, a kind of hydraulic shock unit head of the invention, including be sequentially connected beater mechanism 1, rotating mechanism 2,
Fan Da mechanisms 3, the outside of beater mechanism 1, which is provided with changement 11, the housing of the rotating mechanism 2, is separately installed with horse
Up to one 22 and motor 2 23.The motor can use series connection and two kinds of working conditions in parallel.When using series model for spline
When axle 26 provides power, unit head can obtain the transfer motion power of high speed, less output torque；When two motors are using simultaneously gang mould
When formula is that splined shaft 26 provides power, unit head can obtain the transfer motion power of low speed, and larger output torque passes through control device
Annexation in series or in parallel, provides power, so as to meet different working environments for drilling rod between change motor.
The beater mechanism 1 is provided with the middle cylinder body 12 of changement 11 including outside, connected with described middle one end of cylinder body 12
The upper cylinder body 13 that connects, the piston 14 inside the middle cylinder body 12 and the upper cylinder body 13, the middle other end of cylinder body 12 with
The rotating mechanism 2 is connected.
Bonnet 21 that the rotating mechanism 2 includes be connected with the middle cylinder body 12, it is connected with the bonnet 21 and distinguishes
The housing 24, the protecgulum 25 being connected with housing 24, a part for being provided with motor 1 and motor 2 23 are penetrated by after the connection
The splined shaft 26 in cavity that lid 21, the housing 24 and the protecgulum 25 are constituted, described another part of splined shaft 26 passes through institute
Shu Fanda mechanisms 3；Small bearing bracket 27, the small bearing bracket 27 and the flower are provided between the bonnet 21 and the splined shaft 26
Rear copper sheathing 28 is provided between key axle 26, is provided with and the small axle between the splined shaft 26 and the housing 24, the protecgulum 25
The spline housing 26 that bearing 27 is connected, is provided with gear wheel 20, the spline housing between the rear end of spline housing 26 and the housing 24
Big bearing block 29 is provided between 26 front ends and the protecgulum 25.
Anti- crust breaking body 31 that the Fan Da mechanisms 3 include being connected with protecgulum 25, it is arranged on described anti-beat before enclosure interior
Copper sheathing 32, described another part of splined shaft 26 pass through the anti-crust breaking body 31 and the preceding copper sheathing 32, the anti-crust breaking body 31 with
Butterfly spring 33 is provided between the splined shaft 26 and is located at the packing ring 34 at the both ends of butterfly spring 33.
The both sides of middle cylinder body 12 are separately installed with accumulator 1 and accumulator 2 16, the accumulator 1 include with
The connected base 151 of accumulator one in the side of middle cylinder body 12, the accumulator one being connected with the base 151 of accumulator one are covered
152nd, the nitrogen injection valve that the leather cup 1 that is set on the base 151 of accumulator one, the lid 152 of the accumulator one are provided with
One 154, the accumulator 2 16 includes the base 161 of accumulator two being connected with the middle opposite side of cylinder body 12 and the accumulation of energy
The lid 162 of accumulator two of the base 161 of device two connection, the leather cup 2 163 set on the base 161 of the accumulator two, the accumulation of energy
The nitrogen injection valve 2 164 that the lid 162 of device two is provided with, nitrogen is filled with by nitrogen injection valve 1 and nitrogen injection valve 2 164
To accumulator, available for the pressure in regulation accumulator chamber, play a part of filling and can and release energy.
The changement 11 is arranged on the inner side of middle cylinder body 12, and the changement 11 includes the commutation shell 112
It is interior provided with the valve body 111 and valve pocket 113 that fit together, bonnet 114 also is installed including commutation shell 112 end.
The motor 1 is fixed on the side end face of housing 24 1, and the output shaft of the motor 1 stretches into the shell
The inside of body 24 is simultaneously engaged with the inner ring gear of gear 1, and bearing is provided between the front end of gear 1 and the housing 24
One 222, it is provided with positioned at positioned at another side end face of the housing 24 by the bearing cap 1 of the positioning of bearing 1.
The motor 2 23 is fixed on another side end face of the housing 24, and the output shaft of the motor 2 22 stretches into described
The inside of housing 24 is simultaneously engaged with the inner ring gear of gear 2 231, and axle is provided between the front end of gear 2 231 and the housing 24
2 232 are held, is provided with positioned at positioned at another side end face of the housing 24 by the bearing cap 2 233 of the positioning of bearing 2 232.
The outer ring gear of the gear 1 and the gear 2 231 is engaged with the gear wheel 20.
Hydraulic shock unit head is fixed on rig, drill bit is installed in the end of splined shaft 26, during work, due to motor
1 and motor 2 23 be hydraulic motor, it is necessary to provide power to motor 1 and motor 2 23 by external impetus station, pass through
The band moving gear 1 of motor 1 and the band moving gear 2 231 of motor 2 23 are nibbled so as to drive with gear 1 and gear 2 231
The rotation of the gear wheel 20 of conjunction, due to being connected between big bearing block 29 and gear wheel 20 by key screens so that big bearing block 29
Concomitant rotation then drives the rotation work of drill bit so as to drive the rotation for the splined shaft 26 being connected with the big screens of bearing block 29；
Piston 14 carries out ballistic motion in middle cylinder body 12 and realizes changing for the direction of motion of piston 14 by changement 11
Become, promote piston 14 to be moved up in middle cylinder body 12 when in the bottom high pressure chest of cylinder body in being flowed into when hydraulic oil 12, work as piston
14 when being moved to certain position, and the oil duct of the middle inside of cylinder body 12 connection changement 11 is opened, so as to promote valve body 111 to overcome bullet
The resistance of spring is subjected to displacement, the height of oil circuit and the top of middle cylinder body 12 when valve body 111 is moved to certain position on changement 11
Pressure chamber is communicated, and now the direction of motion of piston 14 changes, and is done at a high speed impact downwards against splined shaft 26, is produced fractured rock
Impact energy, now valve body 111 due to spring resistance reset, complete a percussion action circulation；
Pass through the internal hydraulic pressure of cylinder body 12 in the hitting power and absorption of accumulator 1 and the increase piston 14 of accumulator 2 16
The reaction force of oil；
Because rig can run into the problem of generation drilling rod is blocked unavoidably during being lifted up, due to butterfly spring 33
When being not affected by external force effect, elemental height can hold the shoulder of splined shaft 26, when piston 14 impacts splined shaft 26, splined shaft
26 extruding butterfly springs 33, butterfly spring 33 is acted on forming reaction force by external force so that splined shaft 26 produces vibrations, so that
For overcoming kelly phenomenon during dead man, while absorbing a part of impact energy, each parts of effective protection equipment, raising is set
Standby service life.
Although illustrative embodiment of the invention is described above, in order to the technology of the art
Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the scope of embodiment, to the common skill of the art
For art personnel, as long as long as various change is in the spirit and scope of the invention that appended claim is limited and is determined, one
The innovation and creation using present inventive concept are cut in the row of protection.
Claims (9)
1. a kind of hydraulic shock unit head, including be sequentially connected beater mechanism (1), rotating mechanism (2), Fan Da mechanisms (3), its
It is characterised by, is provided with the outside of the beater mechanism (1) on changement (11), the rotating mechanism (2) and is at least provided with one
Platform motor one (22) and at least one motor two (23) can be installed additional.
2. a kind of hydraulic shock unit head according to claim 1, it is characterised in that the beater mechanism (1) include with
The middle cylinder body (12) of the changement (11) integration, the upper cylinder body (13) being connected with described middle cylinder body (12) one end, it is located at
The middle cylinder body (12) and the internal piston (14) of the upper cylinder body (13), middle cylinder body (12) other end and the whirler
Structure (2) is connected.
3. a kind of hydraulic shock unit head according to claim 1, it is characterised in that the rotating mechanism (2) include with
The bonnet (21) of the middle cylinder body (12) connection, it is connected with the bonnet (21) and is separately installed with motor one (22) and motor
The housing (24) of two (23), the protecgulum (25) being connected with housing (24), a part are penetrated by the connection bonnet (21), the shell
The splined shaft (26) in cavity that body (24) and the protecgulum (25) are constituted, described splined shaft (26) another part passes through described anti-
Beat mechanism (3)；Between the bonnet (21) and the splined shaft (26) be provided with small bearing bracket (27), the small bearing bracket (27) with
Be provided with rear copper sheathing (28) between the splined shaft (26), the splined shaft (26) and the housing (24), the protecgulum (25) it
Between provided with the spline housing (26) that is connected with the small bearing bracket (27), between spline housing (26) rear end and the housing (24)
Provided with gear wheel (20), big bearing block (29) is provided between spline housing (26) front end and the protecgulum (25).
4. a kind of hydraulic shock unit head according to claim 1, it is characterised in that the Fan Da mechanisms (3) include with
Protecgulum (25) connection anti-crust breaking body (31), be arranged on the anti-preceding copper sheathing (32) for beating enclosure interior, the splined shaft (26)
Another part passes through the anti-crust breaking body (31) and the preceding copper sheathing (32), the anti-crust breaking body (31) and the splined shaft (26)
Between provided with butterfly spring (33) and be located at the packing ring (34) at the butterfly spring (33) both ends.
5. a kind of hydraulic shock unit head according to claim 2, it is characterised in that middle cylinder body (12) the both sides difference
Accumulator one (15) and accumulator two (16) are installed, the accumulator one (15) includes being connected with middle cylinder body (12) side
The base of accumulator one (151), the accumulator one that is connected with the base of accumulator one (151) cover (152), the accumulator one
The leather cup one (153) that is set on base (151), the accumulator one cover the nitrogen injection valve one (154) that (152) are provided with, institute
State the base of accumulator two (161) and the accumulator that accumulator two (16) includes being connected with middle cylinder body (12) opposite side
The accumulator two of two bases (161) connection covers (162), the leather cup two (163) set on the base of the accumulator two (161), institute
State accumulator two and cover the nitrogen injection valve two (164) that (162) are provided with.
6. a kind of hydraulic shock unit head according to claim 1, it is characterised in that the changement (11) is arranged on
On the inside of the middle cylinder body (12), the changement (11) is included in the commutation shell (112) provided with the valve body fitted together
(111) bonnet (114) also and valve pocket (113), is installed including described commutation shell (112) end.
7. a kind of hydraulic shock unit head according to claim 1, it is characterised in that the motor one (22) is fixed on institute
State on the side end face of housing (24) one, the output shaft of the motor one (22) stretch into the housing (24) it is internal and with gear one
(221) inner ring gear engagement, is provided with bearing one (222), is located between described (221) front end of gear one and the housing (24)
The bearing cap one (223) for positioning bearing one (222) is provided with positioned at the housing (24) another side end face.
8. a kind of hydraulic shock unit head according to claim 1, it is characterised in that the motor two (23) is fixed on institute
State on housing (24) another side end face, the output shaft of the motor two (22) stretch into the housing (24) it is internal and with gear two
(231) inner ring gear engagement, is provided with bearing two (232), is located between described (231) front end of gear two and the housing (24)
The bearing cap two (233) for positioning bearing two (232) is provided with positioned at the housing (24) another side end face.
9. a kind of hydraulic shock unit head according to claim 1, it is characterised in that the gear one (221) and described
The outer ring gear of gear two (231) is engaged with the gear wheel (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219296.XA CN106939764A (en) | 2017-04-06 | 2017-04-06 | A kind of hydraulic shock unit head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219296.XA CN106939764A (en) | 2017-04-06 | 2017-04-06 | A kind of hydraulic shock unit head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106939764A true CN106939764A (en) | 2017-07-11 |
Family
ID=59464291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710219296.XA Pending CN106939764A (en) | 2017-04-06 | 2017-04-06 | A kind of hydraulic shock unit head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106939764A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020043386A1 (en) * | 2000-10-18 | 2002-04-18 | Max Co., Ltd. | Air impact driver |
| CN201865568U (en) * | 2010-11-05 | 2011-06-15 | 秦皇岛天业通联重工股份有限公司 | Full-hydraulic multifunctional power head |
| CN202249732U (en) * | 2011-10-18 | 2012-05-30 | 无锡市安迈工程机械有限公司 | Impact type power head |
| CN104453704A (en) * | 2014-11-18 | 2015-03-25 | 长沙天和钻具机械有限公司 | Top hammer type impact rotary power head of hydraulic drilling machine |
| CN206928900U (en) * | 2017-04-06 | 2018-01-26 | 张家港保税区永大机械有限公司 | A kind of hydraulic shock unit head |
-
2017
- 2017-04-06 CN CN201710219296.XA patent/CN106939764A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020043386A1 (en) * | 2000-10-18 | 2002-04-18 | Max Co., Ltd. | Air impact driver |
| CN201865568U (en) * | 2010-11-05 | 2011-06-15 | 秦皇岛天业通联重工股份有限公司 | Full-hydraulic multifunctional power head |
| CN202249732U (en) * | 2011-10-18 | 2012-05-30 | 无锡市安迈工程机械有限公司 | Impact type power head |
| CN104453704A (en) * | 2014-11-18 | 2015-03-25 | 长沙天和钻具机械有限公司 | Top hammer type impact rotary power head of hydraulic drilling machine |
| CN206928900U (en) * | 2017-04-06 | 2018-01-26 | 张家港保税区永大机械有限公司 | A kind of hydraulic shock unit head |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170711 |
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| RJ01 | Rejection of invention patent application after publication |