CN107989628A - Car body stabilising arrangement and drilling machine - Google Patents

Car body stabilising arrangement and drilling machine Download PDF

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Publication number
CN107989628A
CN107989628A CN201711442410.1A CN201711442410A CN107989628A CN 107989628 A CN107989628 A CN 107989628A CN 201711442410 A CN201711442410 A CN 201711442410A CN 107989628 A CN107989628 A CN 107989628A
Authority
CN
China
Prior art keywords
car
drilling
longitudinal
stabilising arrangement
plate
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
Application number
CN201711442410.1A
Other languages
Chinese (zh)
Inventor
桂步根
何英男
任军
孙玉才
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.)
Jiangsu Noble Heavy Industry Co Ltd
Original Assignee
Jiangsu Noble Heavy Industry 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 Jiangsu Noble Heavy Industry Co Ltd filed Critical Jiangsu Noble Heavy Industry Co Ltd
Priority to CN201711442410.1A priority Critical patent/CN107989628A/en
Publication of CN107989628A publication Critical patent/CN107989628A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10Making by using boring or cutting machines
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere

Abstract

The present invention relates to technical field of engineering machinery, provide a kind of car body stabilising arrangement and drilling machine, the car body stabilising arrangement is arranged on drilling machine, to make car body keep stablizing in the drilling part course of work of the drilling machine, it includes hull bottom plate, longitudinal moving mechanism, transverse moving mechanism, main shaft and swing mechanism.Pass through the cooperation of longitudinal moving mechanism, transverse moving mechanism and swing mechanism, compensate front-end of spindle set drilling part around and rotating distance, solve the technical problem of body construction force unbalance in the course of work of drilling part of drilling machine, car body is in more stable position.

Description

Car body stabilising arrangement and drilling machine
Technical field
The present invention relates to technical field of engineering machinery, and in particular to a kind of tunnel boring machine, more particularly, to one on drilling machine Kind body construction.
Background technology
In recent years, with the fast development of the infrastructure constructions such as China's highway, high-speed railway and city underground, need Want the engineering of tunneling more and more, corresponding tunnelling machinery has been more and more widely used.
Current engineering tunnel is excavated using excavating machineries such as shield machines or carries out explosion using blasting procedure more.
And in existing excavating machinery, be all drill bit or drilling tool are set directly on development machine be aligned region to be tunneled into Row, which bores, to be dug, and drill bit or drilling tool can produce very big vibration during the work time, and vibration can cause the vibration of whole excavator, then It can not ensure that drill bit or drilling tool bore the accuracy dug.
The content of the invention
It is an object of the invention to provide a kind of car body stabilising arrangement and the drilling machine for being provided with the car body stabilising arrangement, with solution Certainly drill bit or drilling tool cause the unstable technical problem of car body in drilling process.
The present invention is achieved through the following technical solutions:
The present invention provides a kind of car body stabilising arrangement, which is arranged on drilling machine, to make the drilling machine Car body kept in the drilling part course of work of the drilling machine stablize, it include hull bottom plate, longitudinal moving mechanism, laterally shifting Motivation structure, main shaft and swing mechanism;
Wherein, the anteroposterior direction of the longitudinal moving mechanism along the car body is arranged on the hull bottom plate top, described Transverse moving mechanism is arranged on the longitudinal moving mechanism top parallel to horizontal plane and perpendicular to the anteroposterior direction of the car body;
The main shaft is vertically set on the transverse moving mechanism top, and the main shaft is in the longitudinal moving mechanism and institute State the direction around under the drive of transverse moving mechanism respectively along the car body and carry out lengthwise movement and transverse movement;
The swing mechanism is arranged on the front end of the main shaft, for the drilling part rotation for setting the car body front end.
Further improve of above-mentioned technical proposal is that the longitudinal moving mechanism includes two longitudinal rails and zigzag tread patterns Device, two longitudinal rails are arranged in parallel, and the longitudinal driving device is fixed on the hull bottom plate, drives the horizontal stroke Lengthwise movement is carried out to moving mechanism.
Further improve of above-mentioned technical proposal is that the longitudinal driving device is hydraulic cylinder.
Further improve of above-mentioned technical proposal is that some row's support plates are evenly arranged with the hull bottom plate, is used for Two longitudinal rails are supported, the support plate is vertical with the longitudinal rail.
Further improve of above-mentioned technical proposal be, the transverse moving mechanism includes two cross slide ways, laterally driven Device and transverse shifting bottom plate, the transverse shifting bottom plate are arranged on the longitudinal moving mechanism, two cross slide ways It is arranged in parallel in the both ends of the transverse shifting bottom plate.
Further improve of above-mentioned technical proposal be, the lateral driver device is hydraulic cylinder, one end of the hydraulic cylinder Fixed with the transverse shifting bottom plate, the other end is connected with the main shaft.
Further improve of above-mentioned technical proposal is that the main shaft bottom is provided with two and cross slide way cooperation Connector sleeve, the connector sleeve are connected on two cross slide ways, under the driving of the lateral driver device described in drive Main shaft is moved along the cross slide way.
Further improve of above-mentioned technical proposal be, the swing mechanism includes turntable and rotating blade drive, described turn Vertically the hull bottom plate is arranged on the front end of the main shaft to disk, and the rotating blade drive drives the turntable to rotate.
Further improve of above-mentioned technical proposal is that the rotating blade drive is hydraulic cylinder.
The present invention also provides a kind of drilling machine, which includes drilling part and car body, is provided with the car body according to above-mentioned Any car body stabilising arrangement in technical solution, the front end of the car body stabilising arrangement is provided with the drilling part.
Beneficial effects of the present invention are as follows:
A kind of car body stabilising arrangement provided by the invention, its be provided with longitudinal moving mechanism, transverse moving mechanism, main shaft and Swing mechanism, and the drilling part of drilling machine is during annular groove is cut, the angles and positions of drill bit are different during due to cutting, Cutting is firmly larger, and the body construction of drilling machine is subject to the power of different directions can be larger, in order to balance the power that different directions are subject to, leads to The mutual cooperation of longitudinal moving mechanism, transverse moving mechanism and swing mechanism is crossed, makes the drilling part being connected by turntable with main shaft Mobile and rotation planar around can be realized, so that it can be adjusted to properly during the work time Position so that stress is more balanced, stablized whole body construction during the work time, also ensure that the work well of drill bit. In addition, drilling machine provided by the invention, it is provided with above-mentioned car body stabilizing mechanism, can ensure drilling machine at work steady.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the overall structure diagram of car body stabilising arrangement provided in an embodiment of the present invention;
Fig. 2 is the front view of car body stabilising arrangement provided in an embodiment of the present invention;
Fig. 3 is the side view of car body stabilising arrangement provided in an embodiment of the present invention;
Fig. 4 is the overall structure diagram of drilling machine provided in an embodiment of the present invention.
Reference numeral:
1- hull bottom plates;2- longitudinal moving mechanisms;3- transverse moving mechanisms;4- main shafts;5- swing mechanisms;6- is indulged Direction guiding rail;7- longitudinal driving devices;8- support plates;9 cross slide ways;10- lateral driver devices;11- transverse shifting bottom plates; 12- connector sleeves;13- turntables;14- rotating blade drives;15- drilling parts;16 car bodies.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is Part of the embodiment of the present invention, instead of all the embodiments.The present invention implementation being usually described and illustrated herein in the accompanying drawings The component of example can be arranged and designed with a variety of configurations.Therefore, the reality of the invention to providing in the accompanying drawings below The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected implementation of the present invention Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts Every other embodiment, belongs to the scope of protection of the invention.
In the description of the present invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ", The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to Easy to describe the present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " the 3rd " is only used for description purpose, and it is not intended that instruction or hint relative importance.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;Can To be mechanical connection or be electrically connected;It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.
The embodiment of the present invention is described in detail below in conjunction with attached drawing 1-4.It should be appreciated that herein Described embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
For the designer of the present invention by long-term exploration and trial, reform and innovation, devise a kind of drilling tool, it is arranged on brill On machine, annular groove is dug for boring, when being excavated to tunnel, drilling tool need not bore on drilling area is treated and dig deep hole again, Only need to bore the annular groove for digging certain depth, the circumference of the drill core among annular groove is faced sky, it is convenient subsequently to boring Core crack broken.Correspondingly, designer also devises a kind of and matching used car body stabilising arrangement of the drilling tool, the car body Stabilising arrangement is arranged on drilling machine, and balance and steady is kept in use dedicated for making to be provided with the drilling machine of above-mentioned drilling tool It is fixed.
Embodiment
Attached drawing 1 is referred to, the present embodiment provides a kind of car body stabilising arrangement, which is arranged on drilling machine, To make the car body of the drilling machine keep stablizing in the drilling part course of work of the drilling machine, it includes hull bottom plate 1, longitudinal direction Moving mechanism 2, transverse moving mechanism 3, main shaft 4 and swing mechanism 5;
Wherein, the anteroposterior direction of longitudinal moving mechanism 2 along the car body is arranged on the hull bottom plate top, described Transverse moving mechanism 3 is arranged on the longitudinal moving mechanism 2 parallel to horizontal plane and perpendicular to the anteroposterior direction of the car body Portion;
The main shaft 4 is vertically set on 3 top of transverse moving mechanism, and the main shaft 4 is in the longitudinal moving mechanism 2 Lengthwise movement is carried out along the direction around of the car body and laterally transport respectively under drive with the transverse moving mechanism 3 It is dynamic;
The swing mechanism 5 is arranged on the front end of the main shaft 4, for the drilling part rotation for setting the car body front end Turn.
Above-described embodiment provide car body stabilising arrangement, its be provided with longitudinal moving mechanism, transverse moving mechanism, main shaft and Swing mechanism, and the drilling part of drilling machine is during annular groove is cut, angles and positions when being cut due to drill bit are different, Cutting is firmly larger, and the body construction of drilling machine is subject to the power of different directions can be larger, in order to balance the power that different directions are subject to, leads to The mutual cooperation of longitudinal moving mechanism, transverse moving mechanism and swing mechanism is crossed, makes the drilling part being connected by turntable with main shaft Mobile and rotation planar around can be realized, so that it can be adjusted to properly during the work time Position so that stress is more balanced, stablized whole body construction during the work time.
Attached drawing 2 and attached drawing 3 are referred to, further, longitudinal moving device 2 described in the present embodiment is led including two longitudinal directions Rail 6 and longitudinal driving device 7, two longitudinal rails 6 are arranged in parallel, and the longitudinal driving device 7 is fixed on the car body On bottom plate 1, the transverse moving mechanism 3 is driven to carry out lengthwise movement.
Attached drawing 3 is referred to, further, the longitudinal driving device 7 described in the present embodiment is preferably hydraulic cylinder.
The present embodiment is moved forward and backward by the transverse moving mechanism for setting longitudinal rail set its upper part, and passes through liquid Cylinder pressure is driven, simple in structure, stable movement.During specific setting, two longitudinal rails are arranged on to the left and right of hull bottom plate Both ends, the concrete structure of longitudinal rail can make corresponding set according to the structure of the transverse moving mechanism of its upper part setting.
Attached drawing 2 and attached drawing 3 are referred to, further, in the present embodiment, is evenly arranged with the hull bottom plate 1 some Support plate 8 is arranged, is used to support two longitudinal rails 6, the support plate 8 is vertical with the longitudinal rail 6.
By setting some evenly distributed support plates, the height of main shaft can be improved in setting direction, makes whole car body Structure is more reasonable in solid.Preferably, a support plate 8 is respectively set before, during and after 1 top of hull bottom plate, and is being propped up The upper end of fagging 8 is set and the matched structure of longitudinal rail.For example, longitudinal rail can be arranged to U-type groove, on the supporting plate End sets groove the U-type groove is connected in groove.
Attached drawing 3 is referred to, further, transverse moving mechanism 3 described in the present embodiment includes two cross slide ways 9, horizontal stroke To driving device 10 and transverse shifting bottom plate 11, the transverse shifting bottom plate 11 is arranged on the longitudinal moving mechanism 2, two The cross slide way 9 is arranged in parallel in the both ends of the transverse shifting bottom plate 11.Preferably, lateral driver device is arranged on two The centre position of cross slide way described in bar.During specific setting, longitudinal rail can be arranged in the bottom of transverse shifting bottom plate 11 and matched somebody with somebody The sliding block or groove of conjunction, are the relative motions together that both can closely engage.In transverse shifting bottom plate 11 and cross slide way 9 Between stent is set, be lateral driver device reserved location.
Attached drawing 3 is referred to, further, lateral driver device 10 described in the present embodiment is hydraulic cylinder, the hydraulic cylinder One end fixed with the transverse shifting bottom plate 11, the other end is connected with the main shaft 4.
Attached drawing 3 is referred to, further, the bottom of main shaft 4 described in the present embodiment is provided with two and the cross slide way 9 The connector sleeve 12 of cooperation, the connector sleeve 12 is connected on two cross slide ways 9, in the drive of the lateral driver device 10 The dynamic lower drive main shaft 4 is moved along the cross slide way 9.
By setting cross slide way structure to drive main shaft to be moved in laterally i.e. left and right directions in the present embodiment.By Transverse shifting bottom plate is set on longitudinal rail, support is provided for cross slide way, lateral driver device, will in order to make stress steady Cross slide way is arranged on the both ends of transverse shifting bottom plate, and lateral driver device is arranged on to the centre of two cross slide ways.
Above-described embodiment makes main shaft be moved up in cross slide way by setting connector sleeve to be connected in cross slide way in main shaft bottom Dynamic, the connection of cross slide way and main shaft in addition can also use other modes, such as the cooperation using sliding block and groove or roller With the cooperation of groove etc..
Attached drawing 2 is referred to, further, swing mechanism 5 described in the present embodiment includes turntable 13 and rotating blade drive 14, vertically the hull bottom plate 1 is arranged on the front end of the main shaft 4 to the turntable 13, and the rotating blade drive 14 drives institute Turntable 13 is stated to rotate.
Further, the rotating blade drive 14 is hydraulic cylinder.
, it is necessary to constantly adjust position according to construction requirement during boring cutout and cutting, it is subject in diverse location for drilling part Power also can be different, by setting the turntable in front-end of spindle, it is rotated with 360 degree, in longitudinal moving mechanism and transverse direction Under the cooperation of moving mechanism, drive the drilling part that its front end is set to be rotated, and drilling part is navigated into suitable position, make , when changing position work, the dynamic balance that body construction is subject to is uniform for it.
Attached drawing 4 is referred to, the present embodiment provides a kind of drilling machine, which includes drilling part 15 and car body 16, the car body It is provided with 16 according to any car body stabilising arrangement in above-mentioned technical proposal, the front end of the car body stabilising arrangement is set It is equipped with the drilling part 15.
When the drilling machine starts to bore digging, drilling-machine shifter to designated position is fixed into support, it is then steady by the car body on drilling machine Determine device and set drilling part adjustment arrive suitable position, this adjusts setting up procedure by moving around and plane Rotation, stroke of the compensation drilling part in space, makes the car body after adjusting be in what is more balanced in the course of work of drilling part Position, so that drilling machine makes car body is overall more to stablize in operation, improves to bore and digs effect.
Wherein, the drilling part of the drilling machine includes a kind of specific drilling tool, and above-mentioned drilling tool, which is exclusively used in boring, digs annular groove, it includes Drilling pipe and at least one set of drill bit, drill bit described in every group include the first drill bit and the second drill bit;First drill bit and described Two drill bits are symmetrically disposed in the end of the drilling pipe centered on the center of circle of the drilling pipe end face, and first drill bit to The inner wall of the drilling pipe deflects and protrudes from the inner wall of the drilling pipe, and the outer wall of the second drill bit to the drilling pipe is deflected and dashed forward For the outer wall of the drilling pipe.In a preferred embodiment, drilling pipe selects seamless steel pipe, and drilling pipe diameter is arranged to 600- 800mm, drilling pipe length are arranged to 1000mm, i.e., the depth that can be crept into every time is about 1m.
First drill bit and the second drill bit include cutter head and tool tip, and the cutter head is arranged in the tool tip, The tool tip is fixed on the end of the drilling pipe by fastener.The fastener is screw.The cutter head is cylindric, and The cutter head, which retreats, to be tiltedly arranged in the tool tip.The end of the drilling pipe has been uniformly arranged in the circumferential direction brill described in three groups Head, and first drill bit and second drill bit are arranged in a crossed manner.
The drilling tool further includes driving device, and the driving device is arranged on the rear end of the drilling pipe, described for driving Drilling pipe rotates.Driving device is arranged to hydraulic motor by the present embodiment.The center of rotation of hydraulic motor and the center of drilling pipe is set to exist On one line, it ensure that drilling pipe does not deviate in when drilling area is crept into pair, and tradition is also eliminated with fluid motor-driven Gear reducer and gear-box coordinate driving structure, simplified equipment, and improve the precision of transmission.
The drilling tool further includes propulsion device, and the propulsion device is arranged on the lower part of the drilling pipe, described for promoting Drilling pipe moves forward.Preferably, the propulsion device is hydraulic cylinder.
The driving in tunnel is carried out using the drilling machine for being provided with above-mentioned drilling tool, its step includes:
Treating that drilling area periphery drills through some first annular grooves using the drilling machine, making the first annular groove will It is described to treat that drilling area surrounds;
The unbroken region splitting in the centre of the first annular groove is burst, and disintegrating slag is cleared up;
Some second annular grooves are drilled through in the middle part for treating drilling area;
The unbroken region splitting in the centre of the second annular groove is burst, and disintegrating slag is cleared up;
By between the first annular groove, between the second annular groove and the first annular groove and described Non- connected region between second annular groove crushes, and makes entirely to treat that drilling area connects, disintegrating slag is cleared up.
Compared with traditional tunneling method, the requirement of the method for work of the drilling machine to equipment is relatively low, and device structure Simply, cost is relatively low, easily operated, will not produce vibration, impact, noise and dust, environmental pollution very little.
Finally it should be noted that:The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that:Its according to Can so modify to the technical solution described in foregoing embodiments, either to which part or all technical characteristic into Row equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology The scope of scheme.

Claims (10)

1. a kind of car body stabilising arrangement, it is characterised in that the car body stabilising arrangement is arranged on drilling machine, to make the drilling machine Car body keeps stablizing in the drilling part course of work of the drilling machine, it includes hull bottom plate, longitudinal moving mechanism, transverse shifting Mechanism, main shaft and swing mechanism;
Wherein, the anteroposterior direction of the longitudinal moving mechanism along the car body is arranged on the hull bottom plate top, the transverse direction Moving mechanism is arranged on the longitudinal moving mechanism top parallel to horizontal plane and perpendicular to the anteroposterior direction of the car body;
The main shaft is vertically set on the transverse moving mechanism top, and the main shaft is in the longitudinal moving mechanism and the horizontal stroke Direction around under to the drive of moving mechanism respectively along the car body carries out lengthwise movement and transverse movement;
The swing mechanism is arranged on the front end of the main shaft, for the drilling part rotation for setting the car body front end.
2. car body stabilising arrangement according to claim 1, it is characterised in that the longitudinal moving mechanism includes two longitudinal directions Guide rail and longitudinal driving device, two longitudinal rails are arranged in parallel, and the longitudinal driving device is fixed on the car body bottom On plate, the transverse moving mechanism is driven to carry out lengthwise movement.
3. car body stabilising arrangement according to claim 2, it is characterised in that the longitudinal driving device is hydraulic cylinder.
4. car body stabilising arrangement according to claim 2, it is characterised in that be evenly arranged with the hull bottom plate some Support plate is arranged, is used to support two longitudinal rails, the support plate is vertical with the longitudinal rail.
5. car body stabilising arrangement according to claim 1, it is characterised in that the transverse moving mechanism includes two transverse directions Guide rail, lateral driver device and transverse shifting bottom plate, the transverse shifting bottom plate are arranged on the longitudinal moving mechanism, two The cross slide way is arranged in parallel in the both ends of the transverse shifting bottom plate.
6. car body stabilising arrangement according to claim 5, it is characterised in that the lateral driver device is hydraulic cylinder, institute The one end and the transverse shifting bottom plate for stating hydraulic cylinder are fixed, and the other end is connected with the main shaft.
7. car body stabilising arrangement according to claim 5, it is characterised in that the main shaft bottom be provided with two with it is described The connector sleeve that cross slide way coordinates, the connector sleeve is connected on two cross slide ways, in the lateral driver device Driving is lower to drive the main shaft to be moved along the cross slide way.
8. car body stabilising arrangement according to claim 1, it is characterised in that the swing mechanism includes turntable and turntable drives Dynamic device, vertically the hull bottom plate is arranged on the front end of the main shaft to the turntable, described in the rotating blade drive driving Turntable rotates.
9. car body stabilising arrangement according to claim 8, it is characterised in that the rotating blade drive is hydraulic cylinder.
10. a kind of drilling machine, it is characterised in that the drilling machine includes drilling part and car body, and being provided with the car body will according to right 1-9 any one of them car body stabilising arrangements are sought, the front end of the car body stabilising arrangement is provided with the drilling part.
CN201711442410.1A 2017-12-26 2017-12-26 Car body stabilising arrangement and drilling machine Pending CN107989628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711442410.1A CN107989628A (en) 2017-12-26 2017-12-26 Car body stabilising arrangement and drilling machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711442410.1A CN107989628A (en) 2017-12-26 2017-12-26 Car body stabilising arrangement and drilling machine

Publications (1)

Publication Number Publication Date
CN107989628A true CN107989628A (en) 2018-05-04

Family

ID=62041921

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711442410.1A Pending CN107989628A (en) 2017-12-26 2017-12-26 Car body stabilising arrangement and drilling machine

Country Status (1)

Country Link
CN (1) CN107989628A (en)

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