CN104652433B - Pneumatic driver - Google Patents
Pneumatic driver Download PDFInfo
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- CN104652433B CN104652433B CN201510087117.2A CN201510087117A CN104652433B CN 104652433 B CN104652433 B CN 104652433B CN 201510087117 A CN201510087117 A CN 201510087117A CN 104652433 B CN104652433 B CN 104652433B
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- cylinder body
- valve
- coupling sleeve
- valve gap
- cabinet
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
- E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of pneumatic driver, relate to piling machine technical field.nullThe present invention includes shell、Impact bar、Hammer body、Sleeve pipe、Cylinder body、Valve cabinet、Valve block、Valve gap、Coupling sleeve，The outer wall of shell is provided with left socle and the right support being provided with handle，Described coupling sleeve is placed in the upper end in case body，Valve tank valve sheet and valve gap are placed in coupling sleeve from top to bottom，Cylinder body upper end is provided with external screw thread，Coupling sleeve lower end is provided with internal thread，Cylinder body is threadeded with coupling sleeve，The upper surface of cylinder body contacts with the lower surface of valve gap，Valve cabinet、Valve gap and cylinder body are located by connecting by the second straight pin，The gas circuit hole of valve cabinet、The pore of valve gap is vertically communicated with the lower air admission hole of cylinder body，And connected with inner chamber of cylinder block by the intercommunicating pore of cylinder body lower end，The middle part of cylinder body is provided with and the lower disconnected steam vent of air admission hole，Steam vent and the inner space of cylinder body，Compressed air is passed through trachea gas circuit rotary switch on handle and is entered coupling sleeve，Connect with the gas circuit of valve tank valve sheet valve gap and cylinder body.Air-flow of the present invention is unimpeded, hitting power is strong, blow speed is fast, piling efficiency is high.
Description
Technical field
The present invention relates to piling machine, particularly a kind of pneumatic driver.
Background technology
Small-sized piling in construction or plant stake, is typically all and manually bit by bit taps the stake that need to implant with sledgehammer, stake be driven underground, and this form of construction work wastes time and energy, inefficiency, and the easy deflection of stake squeezed into, and easily causes potential safety hazard.
Summary of the invention
The technical problem to be solved is to provide a kind of pneumatic driver, and it is easy to operate, hitting power is strong, blow speed is fast, piling efficiency is high.
nullFor solving above-mentioned technical problem，The technical solution used in the present invention is: a kind of pneumatic driver，Including shell、Impact bar、Hammer body、Sleeve pipe、Cylinder body、Valve cabinet、Valve block、Valve gap、Coupling sleeve，The outer wall of shell is provided with left socle and the right support being provided with handle，Described coupling sleeve is placed in the upper end in case body，Valve cabinet、Valve block and valve gap are placed in coupling sleeve from top to bottom，Cylinder body upper end is provided with external screw thread，Coupling sleeve lower end is provided with internal thread，Cylinder body is threadeded with coupling sleeve，The upper surface of cylinder body contacts with the lower surface of valve gap，Valve cabinet、Valve gap and cylinder body are located by connecting by the second straight pin，The gas circuit hole of valve cabinet is vertically communicated with the lower air admission hole of cylinder body、The pore of valve gap is vertically communicated with the lower air admission hole of cylinder body，And connected with inner chamber of cylinder block by the intercommunicating pore of cylinder body lower end，The middle part of cylinder body is provided with and the lower disconnected steam vent of air admission hole，Steam vent and the inner space of cylinder body，It is provided with clamping leaf spring between valve cabinet and coupling sleeve，In valve block internal cavity between valve cabinet and valve gap and be close to valve gap stomidium；
Hammer body is positioned at the inner chamber of cylinder body, and cylinder body is divided into upper and lower two cavitys, hammer body coordinates with the inwall slipper seal of cylinder body, the lower end of hammer body is spacing by the step in cylinder body, the lower end of cylinder body is provided with external screw thread, couple swivel nut is respectively arranged at two ends with internal thread and external screw thread up and down, couple swivel nut upper end to threaded with cylinder body, its lower end is connected with casing threads, impact bar is placed in cylinder body, couple in the cavity of swivel nut and sleeve pipe formation, defining flange is set on impact bar, the upper lower surface along dependence cylinder body of defining flange is spacing, its lower end relies on the shoulder coupling swivel nut lower end spacing；
Being provided with buffer gasket and antirattle spring between coupling sleeve and shell, antirattle spring is limited in and is limited in shell and coupling sleeve through, buffer gasket.
Being provided with gas circuit rotary switch on the handle of described right support, gas circuit rotary switch includes switch base, switch sleeve and switch circle, and compressed air is passed through trachea gas circuit rotary switch on handle and entered coupling sleeve, connects with the gas circuit of valve cabinet, valve gap and cylinder body.
The center line of described lower air admission hole and the centerline parallel of cylinder body, lower air admission hole is two, is symmetrically set in the both sides of cylinder body；Steam vent is 6, and symmetry is divided into the both sides of the plane of the center line formation of following air admission hole and cylinder body, and the center line of steam vent is perpendicular with the center line of cylinder body.
Described coupling sleeve is fixed by steady pin and elastic spring with cylinder body.
The upper end of described shell is provided with suspension ring.
Use and have the beneficial effects that produced by technique scheme: in the present invention, hammer body first moves up under compressed-air actuated effect, makes cylinder body epicoele air compress；Hammer body can be in external compressed air with owing to moving up under the pressure that the air of formation compresses, push valve block open and be close to the stomidium of valve cabinet, commutate into compressed air, compressed air enters cylinder body epicoele by the interstitial hole of valve gap, promotion hammer body is rapidly moving downward, form enormous impact power, impact bar is impacted；Simultaneously because the cavity of resorption of cylinder body can be vented rapidly by 6 steam vents, and cavity of resorption communicates with outside air, makes the air of cavity of resorption discharge rapidly；Air inlet the most of the present invention is rapid, is vented the most unimpeded, and epicoele air pressure is big, makes the cyclic process of impact work done shorten, and is greatly improved piling efficiency and hitting dynamics.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of cylinder body of the present invention；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the A-A sectional view of Fig. 2；
Fig. 5 is the structural representation of valve cabinet of the present invention；
Fig. 6 is the sectional view of the B-B of Fig. 5；
Fig. 7 is the sectional view of the C-C of Fig. 5；
In figure: 1, the first hex nut；2, hex head screw；3, rubber handle；4, left socle；5, the second hex nut；6, shell；7, antirattle spring；8, buffer gasket；9, coupling sleeve；10, the first O-ring seals；11, connecting tube；12, pressure nut；13, adapter；14, rubber tube；15, regulation clamp；16, fixing adapter；17, clamping leaf spring；18, valve cabinet；19, valve block；20, the second O-ring seals；21, upper connecting tube seat；22, the first straight pin；23, the 3rd O-ring seals；24, elastic spring；25, steady pin；26, screen pack；27, trim ring；28, the 4th O-ring seals；29, lower linking tube seat；30, the 5th O-ring seals；31, the 6th O-ring seals；32, switch base；33, switch circle；34, switch sleeve；35, right support；36, valve gap；37, the second straight pin；38, the 7th O-ring seals；39, lid is sealed；40, hammer body；41, fixing back-up ring；42, fluting tapered end location screw；43, cylinder body；44, swivel nut is coupled；45, impact bar；46, little fixing back-up ring；47, sleeve pipe；48, trachea；49, steam vent；50, lower air admission hole；51, pin-and-hole；52, valve cabinet air inlet duct；53, gas circuit hole.
Detailed description of the invention
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
GasPower driver is with compressed air as power source, produce mechanical impact force, the mechanization hand tools that workpiece objects is hit, it is applicable to upper drill rod stake and other bar similar beaten on construction ground, to underground, be building built and the electric power preferable piling instrument of beating the industries such as pile, can substitute traditional manual sledgehammer strike, there is hitting power big, the fast efficiency of speed hit is high, and easy to operate, labour intensity is low.
nullThe concrete structure of the present invention is shown in Figure 1，Including shell 6、Cylinder body 43、Valve cabinet 18、Valve block 19、Valve gap 36、Coupling sleeve 9、Impact bar 45、Hammer body 40，Described coupling sleeve 9 is placed in the upper end in shell 6 housing，Valve cabinet 18 valve block 19 and valve gap 36 are placed in coupling sleeve 9 from top to bottom，Cylinder body 43 upper end is provided with external screw thread，Coupling sleeve 9 lower end is provided with internal thread，Cylinder body 43 is threadeded with coupling sleeve 9，The upper surface of cylinder body 43 contacts with the lower surface of valve gap 36，Symmetrically arranged two the second straight pins 37 from through valve cabinet 18、Valve gap 36 is positioned through being connected with cylinder body 43，The gas circuit hole 53 of valve cabinet 18 is vertically communicated with the lower air admission hole 50 of cylinder body 43，The pore of valve gap 36 is vertically communicated with the lower air admission hole 50 of cylinder body 43，And pass through intercommunicating pore and cylinder body 43 inner space of the horizontally set of cylinder body 43 lower end，The middle part of cylinder body 43 is provided with and the lower disconnected steam vent of air admission hole 50 49，Steam vent 49 and the inner space of cylinder body 43，It is provided with valve block 19 in internal cavity between described valve cabinet 18 and valve gap 36，Clamping leaf spring 17 it is provided with between valve cabinet 18 and coupling sleeve 9.
Hammer body 40 is positioned at the inner chamber of cylinder body 43, and cylinder body 43 is divided into upper and lower two cavitys, hammer body 40 coordinates with the inwall slipper seal of cylinder body 43, the lower end of hammer body 40 is spacing by the step in cylinder body 43, the lower end of cylinder body 43 is provided with external screw thread, couple swivel nut 44 is respectively arranged at two ends with internal thread and external screw thread up and down, couple swivel nut 44 upper end to threaded with cylinder body 43, threaded with sleeve pipe 47 in its lower end, impact bar 45 is placed in cylinder body 43, couple in the cavity of swivel nut 44 and sleeve pipe 47 formation, defining flange is set on impact bar 45, the upper lower surface along dependence cylinder body 43 of defining flange is spacing, its lower end relies on the shoulder coupling swivel nut 44 lower end spacing.When resting, hammer body 40 is positioned at the lower end of cylinder body 43 because of deadweight, and spacing by the step in cylinder body 43, will not move down；Impact bar 45 is limited between the lower surface of cylinder body 43 and the shoulder coupling swivel nut 44 lower end.
Being provided with buffer gasket 8 and antirattle spring 7 between coupling sleeve 9 and shell 6, antirattle spring 7 is limited in and is limited in shell 6 and coupling sleeve 9 through, buffer gasket 8.
The outer wall of shell 6 is provided with left socle 4 and right support 35, left socle 4 therein is provided with rubber handle 3, gas circuit rotary switch is installed on right support 35, gas circuit rotary switch includes switch base 32, switch sleeve 34 and switch circle 33, compressed air enters coupling sleeve 9 by trachea 48 through gas circuit rotary switch, connects with the gas circuit of valve cabinet 18, valve gap 36 and cylinder body 43.
The center line of described lower air admission hole 50 and the centerline parallel of cylinder body 43, lower air admission hole 50 is two, is symmetrically set in the both sides of cylinder body 43；Steam vent 49 is 6, and symmetry is divided into the both sides of the plane of the center line formation of following air admission hole 50 and cylinder body 43, and the center line of steam vent 49 is perpendicular with the center line of cylinder body 43.
The second described straight pin 37 is two, lays in right-angled intersection with lower air admission hole 50.
Described coupling sleeve 9 is fixed by steady pin 25 and elastic spring 24 with cylinder body 43, makes cylinder body 43 be connected fastening with coupling sleeve 9.
The upper end of described shell 6 is provided with suspension ring, is suitable to crane loading.
Its operation principle is as follows:
Few drops machine oil must be injected in trachea 48 hole before pneumatic driver work, such as 10# lubricating oil, then whether the gas circuit rotary switch of the handle on the right of inspection machine is fastened, wherein, turn clockwise is to close, turn counterclockwise and be out, check after fastening rotary switch, then outer supply tracheae is packed into trachea 48 firm grip of piling machine, at this moment operator can grab the left and right handle by piling machine and lift by both hands, grab the rubber handle 3 of left socle 4 i.e. on the other hand, grab at the rotary switch of right support 35 on the other hand, piling machine nose sleeve 47 is inserted in drill rod stake to be hit or other bar, if Operating Weight to be alleviated, can also sling piling machine with minor crane tool, the upper case 6 of piling machine is provided with suspension ring.Be ready for ready after, outer supply tracheae can open compressed air, general air pressure range 0.45 1 0.63MPa, compressed air enters right handles rotary switch cavity of resorption by trachea 48 and the rubber tube 14 of piling machine, being rotated to an angle counterclockwise by rotary switch set 34, compressed air is entered rotary switch epicoele through rubber tube 14 to piling machine top connecting tube 11 by rotary switch cavity of resorption by switch circle 33 and switch base 32.Rotary switch can be by conversion anglec of rotation regulation air inflow, and to control blow speed and hitting power, switch sleeve 34 hard-over is 180 degree.Connecting tube 11 engages with coupling sleeve 9, inside clamping leaf spring 17, valve cabinet 18, valve block 19, valve gap 36 are compressed by coupling sleeve 9 together with cylinder body 43, impact bar 45 is inserted in cylinder body 43 lower end, impact bar 45 is fixed on cylinder body 43 by coupling swivel nut 44, cylinder body 43 is internal mixes hammer body 40, so constitutes a set of beater mechanism.nullWhen compressed air enters coupling sleeve 9 gas circuit to time at chamber valve cabinet 18 and valve gap 36 from connecting tube 11，Space, valve block 19 upper end is entered further through valve cabinet air inlet duct 52，Owing to the space of valve block 19 upper end connects with the gas circuit hole 53 of valve cabinet 18，And valve block 19 is close to valve gap 36 stomidium due to Gravitative Loads，And under the compressed-air actuated effect by valve block 19 epicoele, it is adjacent to valve gap 36 stomidium，Compressed air can not enter valve gap 36 inner chamber by the stomidium of valve gap 36 and can not connect with the epicoele of cylinder body 43，Therefore，Compressed air can only enter into the lower air admission hole of cylinder body 43 through the gas circuit hole 53 of valve cabinet 18，Through the intercommunicating pore of cylinder body 43 sidewall until cylinder body 43 cavity of resorption，Hammer body 40 upwards speed is promoted to move，When moving on to certain distance between cylinder body 43 and valve gap 36 on hammer body 40，The compressed gas produced in cylinder body 43 epicoele pushes the valve block 19 being close to valve gap 36 stomidium open，Make valve block 19 upwards，Reversely it is close to the centre bore blocking valve cabinet 18，Block the gas channels entering valve cabinet 18 gas circuit hole 53，At this moment the compressed air that cylinder body 43 cavity of resorption enters is along with discharging moved through cylinder body 43 steam vent 49 excessively on hammer body 40，This cavity of resorption now with atmosphere，I.e. non-compressed air，Meanwhile，Valve block 19 is upwards adjacent to valve cabinet 18，Block the passage entering gas circuit hole 53，The compressed air of coupling sleeve 9 inner chamber enters valve block 19 lower end by valve cabinet air inlet duct 52 and by valve gap 36 stomidium until cylinder body 43 epicoele promotes on the impact bar 45 of hammer body 40 impact cylinder body 43 lower end assembling downwards，By impact bar 45, impulsive force is passed in drill rod stake again；Above, when hammer body 40 impacts downwards impact bar 45 simultaneously, this cavity of resorption produces again compressed gas, this compressed gas is fed back into valve cabinet 18 gas circuit by cylinder body 43 gas circuit and promotes valve block 19 to be close to downwards valve gap 36 stomidium, discharged by steam vent 49 in the compressed air of this most former cylinder body 43 epicoele is impacted downwards along with hammer body 40, this chamber i.e. non-compressed air, return to original, here it is one-shot process, owing to coupling sleeve 9 inner chamber is always with the presence of compressed air, just can repeat above impact process, produce and constantly hit operation, break compressed air until turning off rotary switch, piling machine just quits work.
Piling machine impact part beat time can produce after active force, thus occur that machine vibration affects human body and quiet run, therefore piling machine has been made Vibration Absorption Designing, its vibration-proof structure is mainly by rubber handle 3 and shell 6, seal lid 39, antirattle spring 7, buffer gasket 8 grade forms, its vibration attenuation mechanism is, owing to there being antirattle spring 7, buffer gasket 8, cylinder body 43 in piling machine and shell 6 are to float to combine, cylinder body 43 can be limited up and down in shell 6, when piling machine is beaten, piling machine entirety resilience can clash into the antirattle spring 7 in shell 6 and buffer gasket 8 backward, the material of buffer gasket 8 is cellular rubber, its screen resilience is made to be gradually reduced mitigation, and hand and 6, shell feel micro-shaking, thus serve damping effect.If handle directly engages with piling machine, its screen resilience former power will be delivered to handle and hand and resonate, and because resonant frequency is high, when operator is long, operation can be felt health and do not relaxes.
Application notice:
1. operating air pressure scope 0.45 1 0.63MPa of piling machine, it is impossible to too high or too low, the too high another part of machine that can damage, the too low impulsive force that can reduce affects blow efficiency；
2. must add few drops machine oil before every task in the trachea hole of piling machine to lubricate in guarantor's machine, oily number is 10# machine oil；
3. outer supply rubber tube is before being inserted in piling machine trachea, it is necessary to first opening air-blowing and fall to supply the foul of rubber tube, compressed air must be the most anhydrous, is inserted in and firmly clamps rubber tube；
4., before piling machine sleeve pipe is not inserted in drill rod stake, empty strike of mustn't starting shooting, empty beating can be damaged machine, during operation, also mustn't be started shooting when piling machine is not put safe, to avoid fault and hurt sb.'s feelings；
5. piling machine is when operation, such as the phenomenons such as sound and another part loosen that note abnormalities, should turn off compressed air immediately and shut down, send maintenance department to check and repair；
6. before each end-of-job of piling machine is deposited, it is necessary to machine carries out checking cleaning, and injects few drops machine oil in trachea hole, seal trachea hole, in case foul hand-hole.
Claims (5)
- null1. a pneumatic driver，Including shell (6)、Impact bar (45)、Hammer body (40)、Sleeve pipe (47)，The outer wall of shell (6) is provided with left socle (4) and the right support (35) being provided with handle，It is characterized in that，Including cylinder body (43)、Valve cabinet (18)、Valve block (19)、Valve gap (36)、Coupling sleeve (9)，Described coupling sleeve (9) is placed in the upper end in shell (6) housing，Valve cabinet (18)、Valve block (19) and valve gap (36) are placed in coupling sleeve (9) from top to bottom，Cylinder body (43) upper end is provided with external screw thread，Coupling sleeve (9) lower end is provided with internal thread，Cylinder body (43) is threadeded with coupling sleeve (9)，The upper surface of cylinder body (43) contacts with the lower surface of valve gap (36)，Valve cabinet (18)、Valve gap (36) and cylinder body (43) are located by connecting by the second straight pin (37)，The gas circuit hole (53) of valve cabinet (18) is vertically communicated with the lower air admission hole (50) of cylinder body (43)，The pore of valve gap (36) is vertically communicated with the lower air admission hole (50) of cylinder body (43)，And by the intercommunicating pore of cylinder body (43) lower end and cylinder body (43) inner space，The middle part of cylinder body (43) is provided with and the disconnected steam vent of lower air admission hole (50) (49)，Steam vent (49) and the inner space of cylinder body (43)，Clamping leaf spring (17) it is provided with between valve cabinet (18) and coupling sleeve (9)，To compress valve cabinet (18) and valve gap (36) and cylinder body (43) upper surface，In the valve block (19) internal cavity between valve cabinet (18) and valve gap (36) and be close to valve gap (36) stomidium；Hammer body (40) is positioned at the inner chamber of cylinder body (43), and cylinder body (43) is divided into upper and lower two cavitys, hammer body (40) coordinates with the inwall slipper seal of cylinder body (43), the lower end of hammer body (40) is spacing by the step in cylinder body (43), the lower end of cylinder body (43) is provided with external screw thread, couple swivel nut (44) is respectively arranged at two ends with internal thread and external screw thread up and down, couple swivel nut (44) upper end to threaded with cylinder body (43), threaded with sleeve pipe (47) in its lower end, impact bar (45) is placed in cylinder body (43), in the cavity that connection swivel nut (44) and sleeve pipe (47) are formed, impact bar sets defining flange on (45), the upper lower surface along dependence cylinder body (43) of defining flange is spacing；Being provided with buffer gasket (8) and antirattle spring (7) between coupling sleeve (9) and shell (6), antirattle spring (7) is limited in shell (6) and coupling sleeve (9) through buffer gasket (8).
- Pneumatic driver the most according to claim 1, it is characterized in that, on the handle of described right support (35), gas circuit rotary switch is installed, gas circuit rotary switch includes switch base (32), switch sleeve (34) and switch circle (33), compressed air is passed through the trachea (48) gas circuit rotary switch on handle and is entered coupling sleeve (9), connects with the gas circuit of valve cabinet (18), valve gap (36) and cylinder body (43).
- Pneumatic driver the most according to claim 1, it is characterised in that the center line of described lower air admission hole (50) and the centerline parallel of cylinder body (43), lower air admission hole (50) is two, is symmetrically set in the both sides of cylinder body (43)；Steam vent (49) is 6, and symmetry is divided into the both sides of the plane of the center line formation of following air admission hole (50) and cylinder body (43), and the center line of steam vent (49) is perpendicular with the center line of cylinder body (43).
- Pneumatic driver the most according to claim 1, it is characterised in that described coupling sleeve (9) is fixed by steady pin (25) and elastic spring (24) with cylinder body (43).
- Pneumatic driver the most according to claim 1, it is characterised in that the upper end of described shell (6) is provided with suspension ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510087117.2A CN104652433B (en) | 2015-02-25 | 2015-02-25 | Pneumatic driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510087117.2A CN104652433B (en) | 2015-02-25 | 2015-02-25 | Pneumatic driver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104652433A CN104652433A (en) | 2015-05-27 |
| CN104652433B true CN104652433B (en) | 2016-09-07 |
Family
ID=53244027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510087117.2A Expired - Fee Related CN104652433B (en) | 2015-02-25 | 2015-02-25 | Pneumatic driver |
Country Status (1)
| Country | Link |
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| CN (1) | CN104652433B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351705B (en) * | 2022-02-22 | 2022-10-25 | 南京工业大学 | Dual-mode portable pneumatic hammer for rapidly planting piles in breach plugging |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60188527A (en) * | 1984-11-19 | 1985-09-26 | Nippon Air Brake Co Ltd | Oil-pressure type pile driver |
| MY117544A (en) * | 1999-05-31 | 2004-07-31 | Lau Sing Hian Lau Bing Hian | Improvements relating to jack-in piling systems'''' apparatus and their method of use |
| KR100827370B1 (en) * | 2008-01-15 | 2008-05-06 | 권태운 | Pile driving hammer |
| CN201891117U (en) * | 2010-04-07 | 2011-07-06 | 郭伟 | Buffer for pile driver |
| CN202543924U (en) * | 2012-03-31 | 2012-11-21 | 南京金长江交通设施有限公司 | Hydraulic pile driver for upright posts |
| CN204715356U (en) * | 2015-02-25 | 2015-10-21 | 河北鸿德塑料五金制品有限公司 | Pneumatic driver |
-
2015
- 2015-02-25 CN CN201510087117.2A patent/CN104652433B/en not_active Expired - Fee Related
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| CN104652433A (en) | 2015-05-27 |
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