CN108589481A - A kind of hydraulic engineering equipment - Google Patents

A kind of hydraulic engineering equipment Download PDF

Info

Publication number
CN108589481A
CN108589481A CN201810593175.6A CN201810593175A CN108589481A CN 108589481 A CN108589481 A CN 108589481A CN 201810593175 A CN201810593175 A CN 201810593175A CN 108589481 A CN108589481 A CN 108589481A
Authority
CN
China
Prior art keywords
sliding groove
sliding
chamber
wall
slidably fitted
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.)
Withdrawn
Application number
CN201810593175.6A
Other languages
Chinese (zh)
Inventor
寿金校
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yongkang Giant Wind Technology Co Ltd
Original Assignee
Yongkang Giant Wind Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yongkang Giant Wind Technology Co Ltd filed Critical Yongkang Giant Wind Technology Co Ltd
Priority to CN201810593175.6A priority Critical patent/CN108589481A/en
Publication of CN108589481A publication Critical patent/CN108589481A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/30Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

The invention discloses a kind of hydraulic engineering equipment, including rack, lifting chamber is equipped in the rack, it is slidably fitted with crane in the lifting chamber, the crane inner top is equipped with the first sliding groove, the containing cavities that Open Side Down are equipped in the bottom of the frame end face, it is interconnected between the containing cavities and first sliding groove and is provided with the sliding cavity extended up and down, it is slidably fitted with slide post in the sliding cavity, the sliding panel being fixedly connected at the top of bottom and the slide post is slidably fitted in first sliding groove, perforative slide opening up and down is symmetrically set in the sliding panel, it is slidably fitted with guide rod in the slide opening, the guide rod upper and lower ends are fixedly connected with end wall above and below first sliding groove respectively.

Description

A kind of hydraulic engineering equipment
Technical field
The present invention relates to hydraulic engineering technical field, specifically a kind of hydraulic engineering equipment.
Background technology
In water conservancy construction, in order to keep the hydraulic engineering road surface after construction solid, it is often required to carry out tamping operation, it is existing Rammer compacter structure bulky, inconvenient to use, the big pollution of noise is big, and service life is shorter, and mobile more inconvenient, is in addition tamping Break process is cannot achieve when encountering relatively large particulate matter in the process so that compacting road surface extremely out-of-flatness seriously affects water conservancy Construction efficiency and effect.
Invention content
Deficiency in view of the above technology, the present invention propose a kind of hydraulic engineering equipment.
A kind of hydraulic engineering equipment of apparatus of the present invention, including rack are equipped with lifting chamber, the lifting chamber in the rack In be slidably fitted with crane, the crane inner top is equipped with the first sliding groove, is equipped with and is open in the bottom of the frame end face Downward containing cavities are interconnected between the containing cavities and first sliding groove and are provided with the sliding cavity extended up and down, institute It states and is slidably fitted with slide post in sliding cavity, bottom is slidably fitted in first sliding groove and is fixed at the top of the slide post The sliding panel of connection is symmetrically set with perforative slide opening up and down in the sliding panel, is slidably fitted with and leads in the slide opening Bar, the guide rod upper and lower ends are fixedly connected with end wall above and below first sliding groove respectively, first sliding groove lower left The crane in be equipped with the first rotation chamber being connected with the sliding cavity, be equipped in end wall before and after the first rotation chamber First rotation axis, the first rotation axis front side end is rotatably installed in the first rotation chamber front bulkhead, and rear side end With the first motor be connected by power being fixedly installed in the first rotation axis aft bulkhead, described the on the first rotation chamber Sector gear is fixed in one rotation axis, the slide post left end face is fixed with and the matched tooth of the sector gear Item, the second sliding groove extended up and down is equipped in the slide post, and the second sliding groove inner top can be turned by rolling bearing Dynamic is equipped with spline housing, second motor spline housing top and be fixedly installed in the second sliding groove inner roof wall Power connects, and the spline that Open Side Down is equipped in the spline housing, and spline fitted is equipped with splined shaft in the spline, described Third sliding groove is equipped on the right side of sliding cavity in inner wall, be interconnected setting between the third sliding groove and second sliding groove There is straight slot, left-hand end is slidably fitted in the third sliding groove and stretches into the cunning in second sliding groove and being slidably connected Swing arm is rotatably equipped with the drilling rod extended up and down by rolling bearing in the travelling arm in second sliding groove, The third sliding groove inner roof wall be equipped with second rotation chamber, it is described second rotation chamber in be equipped with the second rotation axis, described second turn Moving axis left-hand end is rotatably installed in the second rotation chamber inner left wall, and right-hand end and is fixedly installed on described second The third motor power connection on the right side of chamber in inner wall is rotated, is fixed in second rotation axis in the second rotation chamber The top pressure cam being slidably matched with the travelling arm top pressure.
Further technical solution, the lifting intracavitary roof is symmetrical to be equipped with hydraulic cylinder, the hydraulic pressure of the hydraulic cylinder Bar is fixedly connected with the crane top end surface.
Further technical solution, the slide post bottom end face are fixed with compaction plate, are passed through up and down in the compaction plate The perforation for being equipped with and being connected with second sliding groove is worn, drilling rod bottom elongated end is fixed in the perforation Drill bit, elongated end is fixedly connected with the splined shaft bottom end face at the top of the drilling rod.
Further technical solution is surrounded with the first top pressure bullet to offset with the sliding panel in the guide rod outer circle Spring.
Further technical solution, the third slide the second top pressure bullet for being equipped in groove bottom wall and offseting with the travelling arm Spring.
Further technical solution is respectively equipped with roller groove in the bottom of four angles of the rack, rotates and match in the roller groove Conjunction is equipped with idler wheel.
The beneficial effects of the invention are as follows:
In the initial state, the hydraulic cylinder is closed apparatus of the present invention, the crane top end surface and the liter Drop intracavitary roof offsets, and the compaction plate is accommodated in completely in the containing cavities, thus can facilitate the movement of the rack.
In use, at moving frame to compacting upper pavement surface, then controls hydraulic cylinder and start, make the crane bottom end Face offsets with the lifting intracavitary bottom wall, at this point, the fully extended containing cavities of the compaction plate, then control first electricity Machine rotates, and drives the sector gear to rotate after the first motor rotation, can be with the rack after the sector gear rotation Engage to drive the slide post drive compaction plate and the sliding panel overcome the active force of first top pressure spring to Lower movement, and after the sector gear and the rack are detached under the action of first top pressure spring, the compaction plate And the sliding sheet reset, the tamping operation of road pavement thus back and forth can be realized, so as to reduce labor intensity, carry significantly High construction efficiency;
When compacting encounters larger particles in the process needs break process, controls the first motor and stop operating and open simultaneously Second motor and the third motor are opened, the spline housing can be driven to drive the spline after the second motor rotation Axis and drilling rod and drill bit rotation, and the top pressure cam can be driven to rotate after third motor rotation and to institute State the reciprocal top pressure of travelling arm, the travelling arm can be driven under the top pressure of the top pressure cam drilling rod and the drill bit to Thus lower movement can carry out break process to larger particles, to be greatly improved compacting evenness of road surface, improve construction effect Fruit;
After the completion of use, the compaction plate can be made to be accommodated in described by crane upward sliding described in the Driven by Hydraulic Cylinder In containing cavities.
Apparatus of the present invention, simple in structure, conveniently moving, high degree of automation is, it can be achieved that compacting to water conservancy construction road surface And fragmentation procedure, it is greatly improved construction efficiency and construction effect.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of inventive embodiments or technical solution in the prior art Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only one invented A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these Attached drawing obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of hydraulic engineering equipment of the present invention.
Fig. 2 is the internal structure schematic diagram of crane in Fig. 1.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive spy Other than sign and/or step, it can combine in any way.
This specification(Including any accessory claim, abstract and attached drawing)Disclosed in any feature, except non-specifically chatting It states, can be equivalent by other or be replaced with similar purpose alternative features.That is, unless specifically stated, each feature is An example in a series of equivalent or similar characteristics.
As shown in Figs. 1-2, a kind of hydraulic engineering equipment of apparatus of the present invention, including rack 10 are equipped in the rack 10 Chamber 11 is lifted, crane 12 is slidably fitted in the lifting chamber 11,12 inner top of the crane is equipped with the first sliding groove 20, The containing cavities 15 that Open Side Down are equipped in 10 bottom end face of the rack, between the containing cavities 15 and first sliding groove 20 It is interconnected and is provided with the sliding cavity extended up and down, slide post 29, first sliding groove are slidably fitted in the sliding cavity It is slidably fitted with the sliding panel 21 that bottom and the top of the slide post 29 are fixedly connected in 20, it is symmetrical in the sliding panel 21 Be provided with perforative slide opening 22 up and down, be slidably fitted with guide rod 24 in the slide opening 22,24 upper and lower ends of the guide rod respectively with First sliding groove, about 20 end wall is fixedly connected, in the crane 12 of 20 lower left of the first sliding groove be equipped with The first rotation chamber 25 that the sliding cavity is connected is equipped with the first rotation axis 26, institute in end wall before and after the first rotation chamber 25 It states 26 front side end of the first rotation axis to be rotatably installed in the first rotation 25 front bulkhead of chamber, and rear side end and fixed setting First motor be connected by power in 26 aft bulkhead of the first rotation axis, described first rotates first rotation on chamber 25 Sector gear 28 is fixed on axis 26,29 left end face of the slide post is fixed with matched with the sector gear 28 Rack 36 is equipped with the second sliding groove 34 extended up and down in the slide post 29, and 34 inner top of the second sliding groove is by turning Dynamic bearing is rotatably equipped with spline housing 31,31 top of the spline housing be fixedly installed on top in second sliding groove 34 30 be connected by power of the second motor in wall, is equipped with the spline 32 that Open Side Down in the spline housing 31, in the spline 32 Spline fitted is equipped with splined shaft 33, and third sliding groove 43, the third sliding groove 43 are equipped in the inner wall of the sliding cavity right side It is interconnected between second sliding groove 34 and is provided with straight slot 37, left-hand end is slidably fitted in the third sliding groove 43 Stretch into the travelling arm 42 in second sliding groove 34 and being slidably connected, the travelling arm in second sliding groove 34 The drilling rod 35 extended up and down is rotatably installed by rolling bearing, 43 inner roof wall of third sliding groove is equipped with second in 42 Chamber 38 is rotated, is equipped with the second rotation axis 40 in the second rotation chamber 38,40 left-hand end of the second rotation axis is rotatably pacified It is rotated in 38 inner left wall of chamber loaded on described second, and right-hand end is rotated with being fixedly installed on described second in 38 right side inner wall of chamber 39 be connected by power of third motor, it is described second rotation chamber 38 in second rotation axis 40 on be fixed with and the sliding The top pressure cam 41 that 42 top pressure of arm is slidably matched.
Valuably or illustratively, wherein 11 inner roof walls of the lifting chamber are symmetrical to be equipped with hydraulic cylinder 13, the hydraulic pressure The hydraulic stem 14 of cylinder 13 is fixedly connected with 12 top end surface of the crane, and stowing operation is automatically controlled to realize.
Valuably or illustratively, wherein 29 bottom end face of the slide post is fixed with compaction plate 16, the compaction plate It is provided through the perforation 161 being connected with second sliding groove 34 up and down in 16,35 bottom elongated end of the drilling rod is fixed Equipped with the drill bit 17 in the perforation 161,35 top elongated end of the drilling rod is fixed with 33 bottom end face of the splined shaft Connection.
Valuably or illustratively, wherein be surrounded in 24 outer circle of the guide rod and offset with the sliding panel 21 First top pressure spring 23, first top pressure spring 23 is to by 21 upward top pressure of the sliding panel.
Valuably or illustratively, wherein be equipped in 43 bottom wall of third sliding groove and offset with the travelling arm 42 Second top pressure spring 44, second top pressure spring 44 is to by 42 upward top pressure of the travelling arm.
Valuably or illustratively, wherein 10 4 angles of the rack are respectively equipped with roller groove 18, the roller groove in bottom It is rotatably assorted in 18 and idler wheel 19 is installed, to be moved easily.
In the initial state, the hydraulic cylinder 13 is closed apparatus of the present invention, 12 top end surface of the crane It offsets with 11 inner roof wall of lifting chamber, the compaction plate 16 is accommodated in completely in the containing cavities 15, the sector gear 28 It is disconnected with the rack 36,21 top end surface of sliding panel and described the under the action of the first top pressure spring 23 One sliding groove, 21 inner roof wall offsets, while 42 top end surface of travelling arm and institute under the action of the second top pressure spring 44 43 inner roof wall of third sliding groove is stated to offset.
In use, at moving frame 10 to compacting upper pavement surface, then controls hydraulic cylinder 13 and start, make the crane 12 Bottom end face offsets with 11 inner bottom wall of lifting chamber, at this point, the fully extended containing cavities 15 of the compaction plate 16, are then controlled The first motor rotation is made, drives the sector gear 28 to rotate after the first motor rotation, 28 turns of the sector gear It can engage to drive the slide post 29 that compaction plate 16 and the sliding panel 21 is driven to overcome institute with the rack 36 after dynamic The active force for stating the first top pressure spring 23 moves downward, and described the after the sector gear 28 and the rack 36 are detached from Under the action of one top pressure spring 23, the compaction plate 16 and the sliding panel 21 reset, and road pavement thus back and forth can be realized Tamping operation;
When compacting encounters larger particles in the process needs break process, controls the first motor and stop operating and open simultaneously Second motor 30 and the third motor 39 are opened, second motor 30 can drive the spline housing 31 to drive after rotating The splined shaft 32 and the rotation of drilling rod 35 and the drill bit 17, and can drive the top after the third motor 39 rotation Belling wheel 41 is rotated to 42 reciprocal top pressure of the travelling arm, and the travelling arm 42 can band under the top pressure of the top pressure cam 41 The dynamic drilling rod 35 and the drill bit 17 move down, and thus can carry out break process to larger particles;
After the completion of use, 12 upward sliding of the crane can be driven by the hydraulic cylinder 13, and the compaction plate 16 is made to store In the containing cavities 15.
The beneficial effects of the invention are as follows:
In the initial state, the hydraulic cylinder is closed apparatus of the present invention, the crane top end surface and the liter Drop intracavitary roof offsets, and the compaction plate is accommodated in completely in the containing cavities, thus can facilitate the movement of the rack.
In use, at moving frame to compacting upper pavement surface, then controls hydraulic cylinder and start, make the crane bottom end Face offsets with the lifting intracavitary bottom wall, at this point, the fully extended containing cavities of the compaction plate, then control first electricity Machine rotates, and drives the sector gear to rotate after the first motor rotation, can be with the rack after the sector gear rotation Engage to drive the slide post drive compaction plate and the sliding panel overcome the active force of first top pressure spring to Lower movement, and after the sector gear and the rack are detached under the action of first top pressure spring, the compaction plate And the sliding sheet reset, the tamping operation of road pavement thus back and forth can be realized, so as to reduce labor intensity, carry significantly High construction efficiency;
When compacting encounters larger particles in the process needs break process, controls the first motor and stop operating and open simultaneously Second motor and the third motor are opened, the spline housing can be driven to drive the spline after the second motor rotation Axis and drilling rod and drill bit rotation, and the top pressure cam can be driven to rotate after third motor rotation and to institute State the reciprocal top pressure of travelling arm, the travelling arm can be driven under the top pressure of the top pressure cam drilling rod and the drill bit to Thus lower movement can carry out break process to larger particles, to be greatly improved compacting evenness of road surface, improve construction effect Fruit;
After the completion of use, the compaction plate can be made to be accommodated in described by crane upward sliding described in the Driven by Hydraulic Cylinder In containing cavities.
Apparatus of the present invention, simple in structure, conveniently moving, high degree of automation is, it can be achieved that compacting to water conservancy construction road surface And fragmentation procedure, it is greatly improved construction efficiency and construction effect.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and Improvement is both fallen in claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (6)

1. a kind of hydraulic engineering equipment, including rack, it is characterised in that:It is equipped in the rack and lifts chamber, in the lifting chamber Be slidably fitted with crane, the crane inner top is equipped with the first sliding groove, be equipped in the bottom of the frame end face be open to Under containing cavities, between the containing cavities and first sliding groove be interconnected be provided with the sliding cavity extended up and down, it is described It is slidably fitted with slide post in sliding cavity, bottom is slidably fitted in first sliding groove and is connected with fixed at the top of the slide post The sliding panel connect is symmetrically set with perforative slide opening up and down in the sliding panel, guide rod is slidably fitted in the slide opening, The guide rod upper and lower ends are fixedly connected with end wall above and below first sliding groove respectively, the institute of first sliding groove lower left The the first rotation chamber for being equipped in crane and being connected with the sliding cavity is stated, first is equipped in end wall before and after the first rotation chamber Rotation axis, the first rotation axis front side end are rotatably installed in the first rotation chamber front bulkhead, and rear side end with it is solid Surely the first motor be connected by power being set in the first rotation axis aft bulkhead, described first rotates described first turn on chamber Be fixed with sector gear on moving axis, the slide post left end face be fixed with the matched rack of the sector gear, The second sliding groove extended up and down is equipped in the slide post, the second sliding groove inner top is rotatable by rolling bearing Spline housing is installed, is connected with the second motor power being fixedly installed in the second sliding groove inner roof wall at the top of the spline housing It connects, the spline that Open Side Down is equipped in the spline housing, spline fitted is equipped with splined shaft, the sliding in the spline Third sliding groove is equipped on the right side of chamber in inner wall, being interconnected between the third sliding groove and second sliding groove, it is logical to be provided with Slot is slidably fitted with left-hand end in the third sliding groove and stretches into second sliding groove and the sliding of sliding connection Arm is rotatably equipped with the drilling rod extended up and down, institute by rolling bearing in the travelling arm in second sliding groove Third sliding groove inner roof wall is stated equipped with the second rotation chamber, described second rotates in chamber equipped with the second rotation axis, second rotation Axis left-hand end is rotatably installed in the second rotation chamber inner left wall, and right-hand end and is fixedly installed on described second turn Third motor power connection on the right side of dynamic chamber in inner wall, be fixed in second rotation axis in the second rotation chamber with The top pressure cam that the travelling arm top pressure is slidably matched.
2. a kind of hydraulic engineering equipment according to claim 1, it is characterised in that:The lifting intracavitary roof is symmetrical Equipped with hydraulic cylinder, the hydraulic stem of the hydraulic cylinder is fixedly connected with the crane top end surface.
3. a kind of hydraulic engineering equipment according to claim 1, it is characterised in that:The slide post bottom end face fixation is set There is compaction plate, the perforation being connected with second sliding groove, the drilling rod bottom are provided through up and down in the compaction plate Elongated end is fixed with the drill bit in the perforation, and elongated end is fixed with the splined shaft bottom end face at the top of the drilling rod Connection.
4. a kind of hydraulic engineering equipment according to claim 1, it is characterised in that:It is surrounded in the guide rod outer circle The first top pressure spring to offset with the sliding panel.
5. a kind of hydraulic engineering equipment according to claim 1, it is characterised in that:It is equipped in the third sliding groove bottom wall The second top pressure spring to offset with the travelling arm.
6. a kind of hydraulic engineering equipment according to claim 1, it is characterised in that:Four angles of the rack are set respectively in bottom There is roller groove, is rotatably assorted in the roller groove and idler wheel is installed.
CN201810593175.6A 2018-06-11 2018-06-11 A kind of hydraulic engineering equipment Withdrawn CN108589481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810593175.6A CN108589481A (en) 2018-06-11 2018-06-11 A kind of hydraulic engineering equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810593175.6A CN108589481A (en) 2018-06-11 2018-06-11 A kind of hydraulic engineering equipment

Publications (1)

Publication Number Publication Date
CN108589481A true CN108589481A (en) 2018-09-28

Family

ID=63627909

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810593175.6A Withdrawn CN108589481A (en) 2018-06-11 2018-06-11 A kind of hydraulic engineering equipment

Country Status (1)

Country Link
CN (1) CN108589481A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110259380A (en) * 2019-05-14 2019-09-20 嘉兴俏奇兔贸易有限公司 Drilling well monitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110259380A (en) * 2019-05-14 2019-09-20 嘉兴俏奇兔贸易有限公司 Drilling well monitor

Similar Documents

Publication Publication Date Title
CN110318760A (en) A kind of mining vertical shaft drilling equipment for avoiding collapsing
CN107621138A (en) A kind of seed drying device for being easy to blanking
CN107700317A (en) A kind of compact road tamping unit
CN109235860A (en) A kind of installation method of splice floor board
CN106351570B (en) A kind of mining hand held hydraulic drill based on multiple-action inner curved radial motor
CN201339476Y (en) Duct piece installation machine
CN108788224A (en) A kind of novel folding household herringbone ladder device
CN108589481A (en) A kind of hydraulic engineering equipment
CN206448248U (en) A kind of hydraulic engineering lift water conservancy gate
CN208528857U (en) A kind of drum-type shot blasting machine
CN108104099A (en) A kind of improved-type compact road tamping unit
CN213022418U (en) A soil sampling device for saline and alkaline land afforestation
CN108755355A (en) A kind of safe hydraulic engineering equipment
CN108660936A (en) A kind of efficient bridge construction method of deep foundation ditch
CN107872194A (en) A kind of modified photovoltaic panel assembly
CN108672756A (en) A kind of foldable domestic herringbone ladder device of stabilization
CN101382046A (en) Inertia variable fly wheel energy storage type well repairing machine
CN108660937A (en) A kind of bridge construction method of deep foundation ditch
CN108817451A (en) A kind of liftable clothes stand device
CN108817450A (en) A kind of foldable domestic herringbone ladder device
CN108755354A (en) A kind of road upkeep robot device
CN109208927A (en) A kind of safe barricade
CN108625406A (en) A kind of the water seepage treatment structure and its construction method on sole plate surface
CN108856778A (en) A kind of high-end letter box arrangement
CN209178311U (en) A kind of tamping tool stops hammering device into shape

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20180928