CN103004329B - Planting digging machine drill with variable diameter - Google Patents

Planting digging machine drill with variable diameter Download PDF

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Publication number
CN103004329B
CN103004329B CN201310017192.2A CN201310017192A CN103004329B CN 103004329 B CN103004329 B CN 103004329B CN 201310017192 A CN201310017192 A CN 201310017192A CN 103004329 B CN103004329 B CN 103004329B
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CN
China
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iii
guiding board
main shaft
soil guiding
bearing pin
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Application number
CN201310017192.2A
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Chinese (zh)
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CN103004329A (en
Inventor
韩鑫
闫松松
史智栋
陈志强
赵思琪
王星海
张帅
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山东理工大学
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Priority to CN201310017192.2A priority Critical patent/CN103004329B/en
Publication of CN103004329A publication Critical patent/CN103004329A/en
Application granted granted Critical
Publication of CN103004329B publication Critical patent/CN103004329B/en

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Abstract

The invention discloses a planting digging machine drill with a variable diameter. The planting digging machine drill is composed of a power transmitting and tunneling device, an expanded support device, and a spiral soil guide device. The planting digging machine drill has the advantageous effects that (1) the design of the planting digging machine drill with the variable diameter disclosed by the invention achieves digging of a taper tree well, so that the energy source is saved, and the usable range of the traditional fixed-diameter drill is expanded; (2) the expanded support device can achieve real-time and flexible reducing operation of the digging machine drill; and the expanded support device is accurate and reliable in reducing manner, and large in change range of a field angle; (3) the tree well dug by the planting digging machine drill with the variable diameter disclosed by the invention is not easy to collapse due to the external disturbance, and the pit retentivity is good; and (4) the taper planting tree well dug by the planting digging machine drill is more beneficial to transplanting operation and planting survival of 'basking mother earth tree' with an inverted cone compared with the cylindrical tree well from the angles of the tree transplanting operation convenience and the planting survival.

Description

A kind of reducing Tree Planting Earthdrill drill bit
Technical field
The present invention relates to a kind of Tree Planting Earthdrill drill bit, especially relate to a kind of reducing Tree Planting Earthdrill drill bit, belong to transplanting machinery field, gardens.
Background technology
Hole digger be widely used in gardens, plant, the digging pit of the field such as piling, punching mechanical, its general working method is: power output interface drives power transmission shaft rotation, turn to drive bit by gearbox, drive sandy soil upwards to rout up by drill bit helical blade, thereby complete the operation process of digging pit.
Drilling tool is key, the element task parts of hole digger.Common small-sized or medium-and-large-sized hole digger, its drilling tool adopting is the fixed diameter formula drill bit with helical blade, has the advantages such as simple in structure, cost is low, easy to operate, the life-span is long.
But, also there is following shortcoming in fixed diameter formula drill bit: (1) is when when transplanting medium-and-large-sized trees, because this class is transplanted wooden root system and is carried back taper " grand-mother ma's soil " more, for ease of planting, must maximized Choice of Bits so that the tree well diameter that digs caters to its " grand-mother ma's soil " maximum gauge, virtually strengthen earth volume, wasted resource; (2) tree well that fixed diameter formula drill bit digs out generally takes the shape of the letter U, and vertical interior facade is more easily subject to external disturbance and caves in, and its result must make the size of dug tree well shrink, and affects the quality of digging pit; (3) diameter of tree well often determined after backfill the Air permenbility size of the loose soil property in the tree root of planting top, the U-shaped tree well digging out for fixed diameter formula drill bit, its the diameter of the tree root of planting top loose soil fix, survive for being easier to trees, can only select larger diameter dimension, virtually also increase earth volume.
The existing problem of above-mentioned fixed diameter formula drill bit has limited the scope of application of this type graden machine to a certain extent, is therefore badly in need of a kind of reducing Tree Planting Earthdrill drill bit that can change in real time, flexibly the diameter of digging pit of design.
Summary of the invention
The object of the present invention is to provide a kind of reducing Tree Planting Earthdrill drill bit that can realize in real time, change flexibly the diameter of digging pit.
The object of the invention is to be achieved through the following technical solutions: comprise power transmission and mole, flaring bracing or strutting arrangement, spiral is led native device, it is characterized in that: power transmission and mole comprise main shaft, hanger IV, hanger V, hanger VI, gear pedosphere, main shaft connecting plate, apex point, the main shaft top that axle head has internal spline is power intake, has near main shaft upper end the screwed hole I that runs through internal spline, screwed hole III, main shaft lower end along circumferentially at interval of 120 ° of central angles successively with hanger IV, hanger V, hanger VI seam, disc gear pedosphere is welded on main shaft lower surface, the axis coinciding of gear pedosphere and main shaft, rectangle main shaft connecting plate is welded in gear pedosphere bottom, center line on main shaft connecting plate long side direction is through the gear pedosphere center of circle, apex point is by apex point connecting plate and the lower surface seam of main shaft connecting plate of its upper surface, the centre of gyration of apex point overlaps with spindle axis, apex point bottom is provided with centering cone point, the centre of gyration of centering cone point overlaps with spindle axis, there is double helix digging blade at apex point middle part along its axis direction roll forming, and the spiral initiating terminal seam of double helix driving blade has digging sword I, digging sword II, flaring bracing or strutting arrangement comprises fixed hub, mark closely nut I, mark closely nut II, mark closely nut III, linear stepping motor, leading screw, motor fixing plate and supporting securing member, sliding shaft sleeve, strut I, strut II, strut III, bearing pin II, bearing pin III, bearing pin V, the fixed hub that has vertically connection plane is placed on the main shaft face of cylinder, and by marking closely nut I, mark closely nut II, mark closely nut III and be fixed on main shaft top, the L shaped motor fixing plate that has pilot hole is fixed with the plane that is connected of fixed hub by 4 screw II, linear stepping motor is fixed by another plane of 4 screw I and L shaped motor fixing plate, its output shaft is connected with leading screw, leading screw axle center is parallel with spindle axis, on the face of cylinder, is provided with successively hanger I at interval of 120 ° of central angles, hanger II, the sliding shaft sleeve of hanger III is placed on the main shaft face of cylinder and is positioned at fixed hub below, sliding shaft sleeve is provided with pushing-pulling-rack towards linear stepping motor direction, pushing-pulling-rack upper surface is provided with guide post and screwed hole II, the guide post upper end parallel with spindle axis, axle center is also slidably connected with it through the pilot hole on motor fixing plate, leading screw lower end is also threaded with it through screwed hole II, hanger I, hanger II, hanger III is respectively by bearing pin II, bearing pin III, bearing pin V and strut I, strut II, strut III is rotatably connected, and spiral is led native device and comprised soil guiding board I, soil guiding board II, soil guiding board III, connect rubber I, connect rubber II, connect rubber III, bearing pin I, bearing pin IV, bearing pin VI, bearing pin VII, bearing pin VIII, bearing pin IX, soil guiding board I, soil guiding board II, the thickness of soil guiding board III equates, interior radius of circle equates, highly equal and central angle is 120 °, soil guiding board I, soil guiding board II, the interior cylinder facade of soil guiding board III is respectively equipped with Connection Block I near central upper portion place, Connection Block II, Connection Block III, Connection Block I is rotatably connected by bearing pin I and strut I, and Connection Block II is rotatably connected by bearing pin IV and strut II, and Connection Block III is rotatably connected by bearing pin IX and strut III, soil guiding board I, soil guiding board II, the place of interior cylinder facade bottom centre of soil guiding board III is respectively equipped with Connection Block IV, Connection Block V, Connection Block VI, Connection Block IV is rotatably connected by the hanger V on bearing pin VII and main shaft, Connection Block V is rotatably connected by the hanger VI on bearing pin VIII and main shaft, Connection Block VI is rotatably connected by the hanger IV on bearing pin VI and main shaft, two side elevations that soil guiding board I is adjacent with soil guiding board II connect with the rubber I that is connected that leaves suitably flexible surplus, two side elevations that soil guiding board II is adjacent with soil guiding board III connect with the rubber II that is connected that leaves suitably flexible surplus, two side elevations that soil guiding board III is adjacent with soil guiding board I connect with the rubber III that is connected that leaves suitably flexible surplus, soil guiding board I, soil guiding board II, the hand of spiral of double helix digging blade that starts to continue respectively from bottom on the outside cylinder facade of soil guiding board III apex point is fixed with double helix and leads native blade, and the outward flange lower edge riveted joint that double helix is led native blade has some spike-tooths.
Described reducing Tree Planting Earthdrill drill bit, subtended angle excursion when soil guiding board I, soil guiding board II, soil guiding board III folding and unfolding is 0 °~40 °.
Operation principle of the present invention is: power source, gearbox send power to reducing Tree Planting Earthdrill auger axis and drill bit is rotated, this drill bit of initial stage of operation presents the function of common fixed diameter formula drill bit, three soil guiding boards all draw in and keep subtended angle is zero, and apex point, soil guiding board are led native blade by double helix digging blade and double helix respectively and realized driving and sandy soil downwards and upwards rout up, when excavation to the predetermined tree well degree of depth 70%~100% time, linear stepping motor turns round under its controller control, driving leading screw to promote pushing-pulling-rack slowly slides downwards together with sliding shaft sleeve, thereby drive three outside flarings of soil guiding board of three strut controls, connection rubber between three soil guiding boards stretches thereupon, the suffered soil resistance of soil guiding board starts to increase, now the double helix on soil guiding board is led native blade and is started to bring into play part digging function by some spike-tooths of its outer edge, sandy soil on tree well bottom and wall under pick are led native blade relay with double helix and are derived outside hole, the tree well that excavates become taper from cylindrical gradually, along with sliding shaft sleeve constantly slowly slides downwards, the subtended angle of soil guiding board also slowly increases, the diameter of the taper tree well that excavates also increases thereupon, in the time that linear stepping motor drives leading screw and pushing-pulling-rack to complete an accurate distance slip, three soil guiding boards just complete an accurate controlled subtended angle to be changed, and now this reducing Tree Planting Earthdrill drill bit is just realized the excavation of a certain subtended angle inferior pyramidal tree well.
Compared with prior art, tool has the following advantages in the present invention: the reducing Tree Planting Earthdrill drill bit design that (1) the present invention adopts, realize the excavation of taper tree well, and not only save the energy, and expanded the scope of application of traditional fixed diameter formula drill bit; (2) the present invention adopts the flaring bracing or strutting arrangement being made up of linear stepping motor, leading screw, sliding shaft sleeve, strut etc. to realize real-time, the reducing operation flexibly of hole digger drill bit, and accurately, reliably, subtended angle excursion is large for its reducing mode; (3) tree well that adopts reducing Tree Planting Earthdrill drill bit of the present invention to be excavated out caves in compared with not being subject to external disturbance, and its hole shape retentivity is better; (4) from transplanting tree operation convenience with plant becomes the consideration of active angle, the taper tree planting tree well that utilizes the present invention to excavate out, compares cylindrical tree well and is more conducive to survive after transplanting operation with back taper " grand-mother ma's soil " trees and cultivation.
Brief description of the drawings
Fig. 1 is the complete machine structure schematic diagram (do not draw connect rubber gauffer) of the embodiment of the present invention in the time of zero subtended angle.
Fig. 2 is the complete machine structure schematic diagram in the time of maximum subtended angle embodiment illustrated in fig. 1.
Fig. 3 is the complete machine structure schematic diagram connecting after rubber that removes in the time of maximum subtended angle embodiment illustrated in fig. 1.
Fig. 4 removes soil guiding board I, II and connects the structural representation after rubber while being the maximum subtended angle in place embodiment illustrated in fig. 1.
Fig. 5 be embodiment illustrated in fig. 1 in the time of maximum subtended angle the relative position schematic diagram of three soil guiding boards.
Fig. 6 is the structural representation of middle apex point embodiment illustrated in fig. 1.
In figure: 1, linear stepping motor 2, main shaft 3, screwed hole I 4, internal spline 5, fixed hub
6, mark closely nut I 7, soil guiding board I 8, connect rubber I 9, soil guiding board II 10, connect rubber II
11, soil guiding board III 12, double helix are led native blade 13, spike-tooth 14, apex point 15, are connected rubber III
16, pushing-pulling-rack 17, bearing pin I 18, Connection Block I 19, strut I 20, bearing pin II 21, leading screw
22, guide post 23, motor fixing plate 24, hanger I 25, sliding shaft sleeve 26, hanger II
27, bearing pin III 28, strut II 29, bearing pin IV 30, Connection Block II 31, hanger III 32, bearing pin V
33, strut III 34, screwed hole II 35, screw I 36, pilot hole 37, screw II 38, mark closely nut II
39, bearing pin VI 40, hanger IV 41, gear pedosphere 42, hanger V 43, bearing pin VII
44, main shaft connecting plate 45, bearing pin VIII 46, hanger VI 47, mark closely nut III 48, screwed hole III
49, Connection Block III 50, bearing pin IX 51, Connection Block IV 52, Connection Block V 53, Connection Block VI
54, centering cone point 55, digging sword I 56, double helix digging blade 57, apex point connecting plate 58, digging sword II
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
In the embodiment shown in Fig. 1~Fig. 6: main shaft 2 tops that axle head has internal spline 4 are power intake, have near main shaft 2 upper ends the screwed hole I 3 that runs through internal spline 4, screwed hole III 48, main shaft 2 lower end along circumferentially at interval of 120 ° of central angles successively with hanger IV 40, hanger V 42, hanger VI 46 seam, disc gear pedosphere 41 is welded on main shaft 2 lower surfaces, the axis coinciding of gear pedosphere 41 and main shaft 2, rectangle main shaft connecting plate 44 is welded in gear pedosphere 41 bottoms, center line on main shaft connecting plate 44 long side directions is through gear pedosphere 41 centers of circle, apex point 14 is by the apex point connecting plate 57 and the 44 lower surface seam of main shaft connecting plate of its upper surface, the centre of gyration of apex point 14 and main shaft 2 axis coincidings, apex point 14 bottoms are provided with centering cone point 54, the centre of gyration of centering cone point 54 and main shaft 2 axis coincidings, there is double helix digging blade 56 at apex point 14 middle parts along its axis direction roll forming, the spiral initiating terminal seam of double helix driving blade 56 has digging sword I 55, digging sword II 58, the fixed hub 5 that has vertically connection plane is placed on main shaft 2 faces of cylinder, and by marking closely nut I 6, mark closely nut II 38, mark closely nut III 47 and be fixed on main shaft 2 tops, the L shaped motor fixing plate 23 that has pilot hole 36 is fixed with the plane that is connected of fixed hub 5 by 4 screw II 37, linear stepping motor 1 is fixed with another plane of L shaped motor fixing plate 23 by 4 screw I 35, its output shaft is connected with leading screw 21, leading screw 21 axle center and main shaft 2 axis parallels, on the face of cylinder, be provided with successively hanger I 24 at interval of 120 ° of central angles, hanger II 26, the sliding shaft sleeve 25 of hanger III 31 is placed on main shaft 2 faces of cylinder and is positioned at fixed hub 5 belows, sliding shaft sleeve 25 is provided with pushing-pulling-rack 16 towards linear stepping motor 1 direction, pushing-pulling-rack 16 upper surfaces are provided with guide post 22 and screwed hole II 34, guide post 22 upper ends of axle center and main shaft 2 axis parallels are also slidably connected with it through the pilot hole 36 on motor fixing plate 23, leading screw 21 lower ends are also threaded with it through screwed hole II 34, hanger I 24, hanger II 26, hanger III 31 is respectively by bearing pin II 20, bearing pin III 27, bearing pin V 32 and strut I 19, strut II 28, strut III 33 is rotatably connected, soil guiding board I 7, soil guiding board II 9, the thickness of soil guiding board III 11 equates, interior radius of circle equates, highly equal and central angle is 120 °, soil guiding board I 7, soil guiding board II 9, the interior cylinder facade of soil guiding board III 11 is respectively equipped with Connection Block I 18 near central upper portion place, Connection Block II 30, Connection Block III 49, Connection Block I 18 is rotatably connected by bearing pin I 17 and strut I 19, Connection Block II 30 is rotatably connected by bearing pin IV 29 and strut II 28, Connection Block III 49 is rotatably connected by bearing pin IX 50 and strut III 33, soil guiding board I 7, soil guiding board II 9, the place of interior cylinder facade bottom centre of soil guiding board III 11 is respectively equipped with Connection Block IV 51, Connection Block V 52, Connection Block VI 53, Connection Block IV 51 is rotatably connected by bearing pin VII 43 and the hanger V 42 on main shaft 2, Connection Block V 52 is rotatably connected by bearing pin VIII 45 and the hanger VI 46 on main shaft 2, Connection Block VI 53 is rotatably connected by bearing pin VI 39 and the hanger IV 40 on main shaft 2, two side elevations that soil guiding board I 7 is adjacent with soil guiding board II 9 connect with the rubber I 8 that is connected that leaves suitably flexible surplus, two side elevations that soil guiding board II 9 is adjacent with soil guiding board III 11 connect with the rubber II 10 that is connected that leaves suitably flexible surplus, two side elevations that soil guiding board III 11 is adjacent with soil guiding board I 7 connect with the rubber III 15 that is connected that leaves suitably flexible surplus, soil guiding board I 7, soil guiding board II 9, the hand of spiral of double helix digging blade 56 that starts to continue respectively from bottom on the outside cylinder facade of soil guiding board III 11 apex point 14 is fixed with double helix and leads native blade 12, the outward flange lower edge riveted joint that double helix is led native blade 12 has some spike-tooths 13.
Finally should be noted that: above embodiment is only in order to show and to describe general principle of the present invention, principal character and advantage of the present invention, those of ordinary skill in the field should understand, the present invention is not restricted to the described embodiments, without departing from the spirit and scope of the present invention, the present invention also has various amendments or is equal to replacement, and do not depart from any amendment of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.

Claims (2)

1. a reducing Tree Planting Earthdrill drill bit, comprise power transmission and mole, flaring bracing or strutting arrangement, spiral is led native device, it is characterized in that: power transmission and mole comprise main shaft (2), hanger IV (40), hanger V (42), hanger VI (46), gear pedosphere (41), main shaft connecting plate (44), apex point (14), main shaft (2) top that axle head has internal spline (4) is power intake, have near main shaft (2) upper end the screwed hole I (3) that runs through internal spline (4), screwed hole III (48), main shaft (2) lower end along circumferentially at interval of 120 ° of central angles successively with hanger IV (40), hanger V (42), hanger VI (46) seam, disc gear pedosphere (41) is welded on main shaft (2) lower surface, the axis coinciding of gear pedosphere (41) and main shaft (2), rectangle main shaft connecting plate (44) is welded in gear pedosphere (41) bottom, center line on main shaft connecting plate (44) long side direction is through gear pedosphere (41) center of circle, apex point (14) is by the apex point connecting plate (57) and main shaft connecting plate (44) lower surface seam of its upper surface, the centre of gyration of apex point (14) and main shaft (2) axis coinciding, apex point (14) bottom is provided with centering cone point (54), the centre of gyration of centering cone point (54) and main shaft (2) axis coinciding, there is double helix digging blade (56) at apex point (14) middle part along its axis direction roll forming, the spiral initiating terminal seam of double helix digging blade (56) has digging sword I (55), digging sword II (58), flaring bracing or strutting arrangement comprises fixed hub (5), mark closely nut I (6), mark closely nut II (38), mark closely nut III (47), linear stepping motor (1), leading screw (21), motor fixing plate (23) and supporting securing member, sliding shaft sleeve (25), strut I (19), strut II (28), strut III (33), bearing pin II (20), bearing pin III (27), bearing pin V (32), the fixed hub (5) that has vertically connection plane is placed on main shaft (2) face of cylinder, and by marking closely nut I (6), mark closely nut II (38), mark closely nut III (47) and be fixed on main shaft (2) top, the L shaped motor fixing plate (23) that has pilot hole (36) is fixed with the plane that is connected of fixed hub (5) by 4 screw II (37), linear stepping motor (1) is fixed with another plane of L shaped motor fixing plate (23) by 4 screw I (35), its output shaft is connected with leading screw (21), leading screw (21) axle center and main shaft (2) axis parallel, on the face of cylinder, be provided with successively hanger I (24) at interval of 120 ° of central angles, hanger II (26), the sliding shaft sleeve (25) of hanger III (31) is placed on main shaft (2) face of cylinder and is positioned at fixed hub (5) below, sliding shaft sleeve (25) is provided with pushing-pulling-rack (16) towards linear stepping motor (1) direction, pushing-pulling-rack (16) upper surface is provided with guide post (22) and screwed hole II (34), guide post (22) upper end of axle center and main shaft (2) axis parallel is also slidably connected with it through the pilot hole (36) on motor fixing plate (23), leading screw (21) lower end is also threaded with it through screwed hole II (34), hanger I (24), hanger II (26), hanger III (31) is respectively by bearing pin II (20), bearing pin III (27), bearing pin V (32) and strut I (19), strut II (28), strut III (33) is rotatably connected, spiral is led native device and is comprised soil guiding board I (7), soil guiding board II (9), soil guiding board III (11), connect rubber I (8), connect rubber II (10), connect rubber III (15), bearing pin I (17), bearing pin IV (29), bearing pin VI (39), bearing pin VII (43), bearing pin VIII (45), bearing pin IX (50), soil guiding board I (7), soil guiding board II (9), the thickness of soil guiding board III (11) equates, interior radius of circle equates, highly equal and central angle is 120 °, soil guiding board I (7), soil guiding board II (9), the interior cylinder facade of soil guiding board III (11) is respectively equipped with Connection Block I (18) near central upper portion place, Connection Block II (30), Connection Block III (49), Connection Block I (18) is rotatably connected by bearing pin I (17) and strut I (19), Connection Block II (30) is rotatably connected by bearing pin IV (29) and strut II (28), Connection Block III (49) is rotatably connected by bearing pin IX (50) and strut III (33), soil guiding board I (7), soil guiding board II (9), the place of interior cylinder facade bottom centre of soil guiding board III (11) is respectively equipped with Connection Block IV (51), Connection Block V (52), Connection Block VI (53), Connection Block IV (51) is rotatably connected by bearing pin VII (43) and the hanger V (42) on main shaft (2), Connection Block V (52) is rotatably connected by bearing pin VIII (45) and the hanger VI (46) on main shaft (2), Connection Block VI (53) is rotatably connected by bearing pin VI (39) and the hanger IV (40) on main shaft (2), two side elevations that soil guiding board I (7) is adjacent with soil guiding board II (9) connect with the rubber I (8) that is connected that leaves suitably flexible surplus, two side elevations that soil guiding board II (9) is adjacent with soil guiding board III (11) connect with the rubber II (10) that is connected that leaves suitably flexible surplus, two side elevations that soil guiding board III (11) is adjacent with soil guiding board I (7) connect with the rubber III (15) that is connected that leaves suitably flexible surplus, soil guiding board I (7), soil guiding board II (9), the hand of spiral of double helix digging blade (56) that starts to continue respectively from bottom on the outside cylinder facade of soil guiding board III (11) apex point (14) is fixed with double helix and leads native blade (12), the outward flange lower edge riveted joint that double helix is led native blade (12) has some spike-tooths (13).
2. reducing Tree Planting Earthdrill drill bit according to claim 1, is characterized in that: subtended angle excursion when soil guiding board I (7), soil guiding board II (9), soil guiding board III (11) folding and unfolding is 0 °~40 °.
CN201310017192.2A 2013-01-17 2013-01-17 Planting digging machine drill with variable diameter CN103004329B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310017192.2A CN103004329B (en) 2013-01-17 2013-01-17 Planting digging machine drill with variable diameter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310017192.2A CN103004329B (en) 2013-01-17 2013-01-17 Planting digging machine drill with variable diameter

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CN103004329B true CN103004329B (en) 2014-10-01

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104798501A (en) * 2015-04-13 2015-07-29 北京工业大学 Soil matrix hole digging and compacting device
CN106400871B (en) * 2016-10-12 2018-07-13 山东科技大学 A kind of tree planting tree well bull-dozer
CN106337657B (en) * 2016-11-24 2018-05-18 合肥工业大学 A kind of deformable rotary drilling-head
CN107046868B (en) * 2017-04-25 2019-06-14 嘉兴景园园林建设有限公司 A kind of pit-picker
CN107736106A (en) * 2017-11-27 2018-02-27 梧州市雅正农业科技有限公司 A kind of portable tea tree pit-picker
CN108633388A (en) * 2018-04-30 2018-10-12 海宁市高级技工学校 A kind of lever regulated formula digging apparatus
CN108781610A (en) * 2018-04-30 2018-11-13 海宁市高级技工学校 It is a kind of to facilitate sized digging apparatus
CN109122193B (en) * 2018-09-03 2021-02-02 桐庐嘉霖茶叶有限公司 Tea seedling planting equipment
CN110537401B (en) * 2019-09-17 2020-11-27 安徽国防科技职业学院 Pit digging method of portable variable-diameter surrounding pit digging machine

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CN2262096Y (en) * 1996-10-15 1997-09-10 何建平 Multiple adaptive bottom enlarging drill bit
CN2288261Y (en) * 1997-06-17 1998-08-19 鞠庆海 Dual-purpose drilling broaching bit controlled by centrifugal wings
CN2459348Y (en) * 2001-01-18 2001-11-14 江西省地质工程总公司 Counter-circulation bottom enlarging drill for hole drilling
CN1281844C (en) * 2003-09-19 2006-10-25 郭明洙 Drilling and reaming machine
JP4667309B2 (en) * 2006-06-30 2011-04-13 株式会社竹中工務店 Expanded excavation bucket
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CN202998807U (en) * 2013-01-17 2013-06-19 山东理工大学 Variable-diameter earth boring machine drill bit for tree planting

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