CN113338799A - Excavation device is used in side slope construction - Google Patents

Excavation device is used in side slope construction Download PDF

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Publication number
CN113338799A
CN113338799A CN202110625346.0A CN202110625346A CN113338799A CN 113338799 A CN113338799 A CN 113338799A CN 202110625346 A CN202110625346 A CN 202110625346A CN 113338799 A CN113338799 A CN 113338799A
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gear
lift
frame
lifting
shaft
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余志刚
张艳艳
莫勇刚
蒋博林
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Chongqing Vocational Institute of Engineering
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Chongqing Vocational Institute of Engineering
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Priority to CN202110625346.0A priority Critical patent/CN113338799A/en
Publication of CN113338799A publication Critical patent/CN113338799A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/04Directional drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B12/00Accessories for drilling tools
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B15/00Supports for the drilling machine, e.g. derricks or masts
    • E21B15/04Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B3/00Rotary drilling
    • E21B3/02Surface drives for rotary drilling
    • E21B3/022Top drives

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

本发明涉及边坡施工设备领域,公开了一种边坡施工用开挖装置,包括机架、开挖机构和升降机构;升降机构包括降程转轴、降程齿轮、升程转轴、升程齿轮、传动齿轮和升降杆;降程转轴转动连接在机架上且与降程齿轮同轴固接,升程转轴转动连接在机架上且与升程齿轮同轴固接,传动齿轮啮合在降程齿轮和升程齿轮之间;升降杆滑动连接在机架上,升降杆的两侧分别设有降程啮齿和升程啮齿,降程转轴上同轴固接有降程扇形齿轮,升程转轴上同轴固接有升程扇形齿轮,降程扇形齿轮与升程扇形齿轮分别与降程啮齿与升程啮齿啮合,降程扇形齿轮的半径小于升程扇形齿轮的半径。本发明解决了深挖机降程和升程速度一致,导致的深挖钻孔整体作业效率降低的问题。

Figure 202110625346

The invention relates to the field of side slope construction equipment, and discloses an excavation device for side slope construction, comprising a frame, an excavation mechanism and a lifting mechanism; the lifting mechanism comprises a lowering shaft, a lowering gear, a lifting shaft and a lifting gear , transmission gear and lifting rod; the lowering shaft is rotatably connected to the frame and fixed coaxially with the lowering gear, the lift shaft is rotatably connected to the frame and coaxially fixed with the lifting gear, and the transmission gear is engaged in the lowering gear. between the lift gear and the lift gear; the lift rod is slidably connected to the frame, the two sides of the lift rod are respectively provided with a drop gear and a lift gear, and the lift shaft is coaxially fixed with a drop sector gear, and the lift A lift sector gear is coaxially fixed on the rotating shaft, the drop sector gear and the lift sector gear are meshed with the drop gear and the lift gear respectively, and the radius of the drop sector gear is smaller than that of the lift sector gear. The invention solves the problem of lowering the overall operation efficiency of the deep excavation drilling caused by the same descending and lifting speed of the deep excavator.

Figure 202110625346

Description

Excavation device is used in side slope construction
Technical Field
The invention relates to the field of slope construction equipment, in particular to an excavation device for slope construction.
Background
The side slope generally refers to a mountain side surface with an inclined slope surface formed naturally or artificially, and is one of the most basic geological environments in human engineering activities and the most common engineering form in engineering construction. The side slopes can be classified into natural side slopes and artificial side slopes according to cause; according to the property of the material for forming the side slope body, the material can be divided into a soil side slope and a rock side slope; and can be classified into a stable side slope, a basic stable side slope, an under-stable side slope and an unstable side slope according to the stability degree of the side slope.
Because the slope surface is inclined, the whole slope body has the tendency of sliding from high to low under the action of the self gravity of the slope body and other external forces, particularly under the action of rainfall scouring, and the phenomenon is particularly obvious for unstable slopes and under-stable slopes, so that the slope protection engineering is particularly important. At present, the slope protection mode generally comprises a mesh-pulling type protection mode and an interception type protection mode, wherein the mesh-pulling type protection mode is that various flexible nets mainly comprising steel wire rope nets are covered and wrapped on a slope or rocks to be protected so as to limit weathering spalling or damage of slope rock and soil mass and dangerous rock collapse; the intercepting type protection means that an intercepting plate is fixed at the bottom of a side slope, and the purpose of intercepting falling rocks is achieved. The intercepting protection is usually to pre-embed pillars at the bottom of a slope, fix a connecting plate (usually iron) between two pillars, and utilize the connecting plate to intercept falling rocks. Deep-digging drilling operation is required before the pillars are embedded, the current deep-digging drilling operation is usually completed by a deep-digging machine, but the descending speed (downward moving deep-digging) and the lifting speed (upward moving resetting) of the current deep-digging machine are consistent and are slow; the lifting process does not need deep-digging operation, but only needs a resetting process, and the slow speed of the lifting process can cause the reduction of the overall operation efficiency of deep-digging drilling.
Disclosure of Invention
The invention aims to provide an excavating device for slope construction, and aims to solve the problem that in the prior art, the integral operation efficiency of deep-digging drilling is reduced due to the fact that the descending distance and the lifting speed of a deep-digging machine are consistent.
In order to achieve the purpose, the invention adopts the following technical scheme: an excavation device for slope construction comprises a frame, wherein an excavation mechanism is vertically and slidably connected to the frame, and a lifting mechanism for driving the excavation mechanism to lift is arranged on the frame; the lifting mechanism comprises a lifting rotating shaft, a lifting gear, a transmission gear and a lifting rod; the stroke lowering rotating shaft is rotationally connected to the rack, the stroke lowering gear is coaxially and fixedly connected with the stroke lowering rotating shaft, the stroke lifting rotating shaft is rotationally connected to the rack, the stroke lifting gear is coaxially and fixedly connected to the stroke lifting rotating shaft, the transmission gear is rotationally connected between the stroke lowering rotating shaft and the stroke lifting rotating shaft, and the transmission gear is meshed between the stroke lowering gear and the stroke lifting gear; the lifting rod is connected to the rack in a sliding mode, a descending stroke meshing tooth and a lifting stroke meshing tooth are arranged on two sides of the lifting rod respectively, a descending stroke sector gear is coaxially and fixedly connected to a descending stroke rotating shaft, a lifting stroke sector gear is coaxially and fixedly connected to the lifting stroke rotating shaft, the descending stroke sector gear and the lifting stroke sector gear can be meshed with the descending stroke meshing tooth and the lifting stroke meshing tooth respectively, and the radius of the descending stroke sector gear is smaller than that of the lifting stroke sector gear.
The principle and the advantages of the scheme are as follows: during practical application, in the technical scheme, the rack plays a role in integral support, and meanwhile, stable connection among all parts of the equipment is guaranteed. The excavation mechanism can move up and down relative to the frame under the driving of the lifting mechanism, and a drilling process is synchronously realized along with the downward movement of the excavation mechanism in the descending process of the excavation mechanism; after the drilling is finished, the driving mechanism drives the excavation mechanism to move upwards (lift). The traditional excavator is consistent in descending distance and lifting distance, and the inventor finds that in the process of actual operation, the drilling efficiency can be improved in a mode of lifting distance and lifting distance. When the excavation mechanism is driven to ascend and descend, the descending rotary shaft is driven to rotate, and the descending sector gear coaxially and fixedly connected with the descending rotary shaft is driven to rotate, so that the lifting rod is driven to move downwards and the excavation mechanism is driven to move downwards, and deep excavation is realized; the rotation of the stroke-reducing rotating shaft can drive the stroke-reducing rotating shaft to synchronously rotate through the transmission gear, the stroke-reducing rotating shaft can drive the stroke sector gear fixedly connected with the stroke-reducing rotating shaft to rotate in the rotating process, and the stroke sector gear is meshed with the stroke rodent of the lifting rod after excavation to drive the lifting rod to move upwards, so that the excavation mechanism moves upwards and resets. In the process, the lift sector gear and the descending sector gear are consistent in angular speed due to the fact that the driving source of the lift sector gear is consistent with the driving source of the descending sector gear, and the diameter of the lift sector gear is larger than that of the descending sector gear, namely the linear speed of the lift sector gear is larger than that of the descending sector gear, so that the speed of the lift is larger than that of the descending sector gear, and excavation efficiency is improved.
Preferably, as an improvement, excavation mechanism includes support frame, gasoline engine and drill bit, and the vertical sliding connection of support frame is in the frame, and the gasoline engine is fixed on the support frame, and the drill bit rotates to be connected on the support frame, and is connected with the shaft coupling between the output shaft of gasoline engine and the drill bit, lifter fixed connection is on the support frame.
Among this technical scheme, the support frame is used for the integral stay excavation mechanism, and when the excavation, the lifter moves down and drives the support frame and move down, and gasoline engine drive drill bit rotates simultaneously for the drill bit moves down and under the pivoted synergism, realizes the deep-cut drilling, and structural design is reasonable.
Preferably, as an improvement, a guide rod is fixed on the rack, a connecting ring is fixed on the support frame, the connecting ring is sleeved outside the guide rod, and the connecting ring can axially slide along the guide rod.
Among this technical scheme, the guide bar mainly plays the effect of stroke direction, and when the relative frame of support frame reciprocated, the go-between can reciprocate along the guide bar, can standardize the removal route, can also improve the stability of equipment unit operation simultaneously.
Preferably, as an improvement, the bottom one end of frame rotates and is connected with the gyro wheel, and the other end is fixed with the stabilizer blade.
In the technical scheme, the rollers are arranged at the bottom of the rack, so that the device can be conveniently transferred, and the operation is more labor-saving; after the device is transferred into place, the support legs can cooperate with the rollers to stably support the device.
Preferably, as a refinement, the foot is provided with a pointed end at its base.
Among this technical scheme, when digging deeply and changeing the hole operation, road surface unevenness around usually sets up most advanced through the bottom at the stabilizer blade, can overcome the road surface roughness and place the influence of stability to the device, lays a good foundation for the steady operation of device.
Preferably, as an improvement, a handrail is fixed to the top end of the frame.
In the technical scheme, the handrail is arranged on the rack, so that the equipment is convenient to keep stable when the equipment is moved, and the direction of the operation personnel is convenient to control.
Preferably, as an improvement, one end of the descending rotating shaft, which is far away from the descending gear, penetrates through the frame and is connected with the driving assembly.
In the technical scheme, the driving assembly is used for driving the descending rotating shaft to rotate, so that the whole equipment is driven to stably run.
Preferably, as an improvement, the driving component is a driving motor, and a coupling is connected between an output shaft of the driving motor and the stroke-reducing rotating shaft.
In the technical scheme, the driving motor rotates, the descending rotating shaft can be driven by the coupler to move, and then the whole equipment can be driven by the descending gear, the transmission gear and the lift gear to operate, so that the structure is simple, and the degree of mechanization is high.
Preferably, as an improvement, the driving assembly comprises a driving wheel coaxially and fixedly connected to the descending rotating shaft, and a handle is fixed on the driving wheel.
In this technical scheme, when drive arrangement moves, operating personnel rotates the drive wheel manually. And then drive and fall journey pivot and rotate, through falling journey gear, drive gear and lift gear drive the operation of whole equipment, operating personnel can adjust the speed of deep-digging drilling operation through adjusting drive wheel pivoted speed to the speed that makes the lower excavation can be adapted to different geological conditions, though degree of automation reduces to some extent, has avoidd the motor trouble and has caused the problem of the whole paralysis of equipment, can guarantee the normal operating of equipment.
Drawings
Fig. 1 is a front view of a first excavating device for slope construction according to an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a frame 1, a roller 2, a handrail 3, a support leg 4, a tip 5, a support frame 6, a gasoline engine 7, a drill bit 8, a guide rod 9, a descending rotary shaft 10, a descending gear 11, a lifting rotary shaft 12, a lifting gear 13, a transmission gear 14, a lifting rod 15, a descending gear 16, a lifting gear 17, a descending sector gear 18 and a lifting sector gear 19.
Example one
This embodiment is substantially as shown in figure 1: an excavation device for slope construction comprises a frame 1, an excavation mechanism and a lifting mechanism.
The frame 1 plays a role of integral support and simultaneously ensures stable connection among all parts of the equipment. The top welded fastening of frame 1 has handrail 3, and the bottom rear side portion of frame 1 rotates and is connected with two gyro wheels 2, and the preceding lateral part welded fastening of frame 1 bottom has two vertical stabilizer blades 4, and the bottom of stabilizer blade 4 is provided with most advanced 5.
Excavation mechanism includes support frame 6, gasoline engine 7 and drill bit 8, and the vertical sliding connection of support frame 6 is in frame 1, and support frame 6 is in this embodiment with the concrete sliding connection mode of frame 1: the welding has two vertical guide bars 9 on frame 1, and the lateral part welding of support frame 6 has two go-between (not shown in the figure), and the go-between cover is established on guide bar 9, and can follow the vertical slip of guide bar 9, so realizes the vertical sliding connection of support frame 6 and frame 1. Gasoline engine 7 passes through the bolt fastening on support frame 6, and 8 vertical settings of drill bit and rotation connect on support frame 6, pass through the coupling joint between the top of drill bit 8 and the output shaft of gasoline engine 7.
The lifting mechanism is used for driving the excavation mechanism to move up and down and comprises a descending rotary shaft 10, a descending gear 11, a lifting rotary shaft 12, a lifting gear 13, a transmission gear 14 and a lifting rod 15; the lift mechanism comprises a frame 1, a lift gear 13, a lift rotating shaft 12, a lift rotating shaft 10, a lift gear 11, a lift gear 13, a lift gear 10, a lift gear, a lifting gear and a lifting gear, wherein the lift gear 13 is connected to the upper portion of the frame 1 in a rotating mode. The transmission gear 14 is rotatably connected between the descending rotating shaft 10 and the lifting rotating shaft 12, and the transmission gear 14 is meshed between the descending gear 11 and the lifting gear 13. The lifting rod 15 is vertically connected to the frame 1 in a sliding manner, and the lifting rod 15 is fixedly connected to the support frame 6. Two sides of the lifting rod 15 are respectively provided with a descending mesh tooth 16 and a lifting mesh tooth 17, a descending sector gear 18 is coaxially and fixedly connected to the descending rotating shaft 10, a lifting sector gear 19 is coaxially and fixedly connected to the lifting rotating shaft 12, the descending sector gear 18 and the lifting sector gear 19 are respectively meshed with the descending mesh tooth 16 and the lifting mesh tooth 17, and the radius of the descending sector gear 18 is smaller than that of the lifting sector gear 19.
One end of the descending rotating shaft 10, which is far away from the descending gear 11, penetrates through the rack 1 and is connected with a driving assembly, the driving assembly in this embodiment is a driving motor fixed on the rack 1, and a coupler is connected between an output shaft of the driving motor and the descending rotating shaft 10.
The specific implementation process is as follows: in side slope protection work progress, when carrying out deep-digging drilling operation, operating personnel holds handrail 3 to make equipment be in the tilt state, promote gyro wheel 2 and rotate, promote equipment to the position of treating the drilling. After the equipment moves to the right position, the operator adjusts the equipment to the vertical state, and the roller 2 and the support leg 4 jointly play a role in supporting the equipment at the moment.
In the initial state, the drill bit 8 is above the ground and the lifting rod 15 is in the high position. During drilling, the driving motor and the gasoline engine 7 are started, the driving motor drives the descending rotating shaft 10 to rotate, and further drives the descending sector gear 18 coaxially and fixedly connected with the descending sector gear to rotate, the descending sector gear 18 can drive the lifting rod 15 to move downwards along the rack 1 through the descending mesh teeth 16 in the rotating process, the lifting rod 15 moves downwards to drive the supporting frame 6 to move downwards, and further the drill bit 8 moves downwards, and the drill bit 8 can rotate under the driving of the gasoline engine 7 while moving downwards, so that the deep-digging drilling process is realized.
The descending rotary shaft 10 rotates, and the lifting rotary shaft 12 meshed with the descending rotary shaft is driven to rotate through the transmission gear 14, and the rotating direction of the lifting rotary shaft 12 is the same as that of the descending rotary shaft 10. The rotation of the lift rotating shaft 12 drives the lift sector gear 19 to rotate, and then the lift rodent 17 drives the lifting rod 15 to move upwards and reset along the frame 1, so that the drill bit 8 moves upwards and resets. In the process, the lift sector gear 19 and the lift sector gear 18 are identical in angular speed due to the fact that the driving sources of the two are identical (both are driving motors), and the linear speed of the lift sector gear 19 is larger than that of the lift sector gear 18 due to the fact that the diameter of the lift sector gear 19 is larger than that of the lift sector gear 18, the speed of the lift is larger than that of the lift sector gear 18, and therefore excavation efficiency is improved.
Example two
The difference between the present embodiment and the first embodiment is: in this embodiment, the driving assembly includes a driving wheel coaxially and fixedly connected to the descending rotation shaft 10, and a handle is fixed to the driving wheel.
During the in-service use, when drive arrangement moves, operating personnel manual rotation drive wheel drives and falls journey pivot 10 and rotate, and when the operation that drives whole equipment through falling journey gear 11, drive gear 14 and lift gear 13, operating personnel can adjust the speed of deep-digging drilling operation through adjusting drive wheel pivoted speed to the speed that makes the lower excavation can be adapted to different geological conditions, though degree of automation reduces to some extent, has avoided motor trouble and has caused the problem of whole paralysis of equipment, can guarantee the normal operating of equipment.
The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (9)

1.一种边坡施工用开挖装置,其特征在于:包括机架,机架上竖向滑动连接有开挖机构,且机架上设置有用于驱动开挖机构升降的升降机构;升降机构包括降程转轴、降程齿轮、升程转轴、升程齿轮、传动齿轮和升降杆;降程转轴转动连接在机架上,降程齿轮与降程转轴同轴固接,升程转轴转动连接在机架上,升程齿轮同轴固接在升程转轴上,所述传动齿轮转动连接在降程转轴和升程转轴之间,且传动齿轮啮合在降程齿轮和升程齿轮之间;升降杆滑动连接在机架上,且升降杆的两侧分别设置有降程啮齿和升程啮齿,所述降程转轴上同轴固接有降程扇形齿轮,升程转轴上同轴固接有升程扇形齿轮,降程扇形齿轮与升程扇形齿轮分别可与降程啮齿与升程啮齿啮合,降程扇形齿轮的半径小于升程扇形齿轮的半径。1. An excavation device for side slope construction is characterized in that: comprising a frame, the frame is vertically slidably connected with an excavation mechanism, and the frame is provided with a lifting mechanism for driving the lifting of the excavation mechanism; It includes a lowering shaft, a lowering gear, a lifting shaft, a lifting gear, a transmission gear and a lifting rod; the lowering shaft is rotatably connected to the frame, the lowering gear and the lowering shaft are fixed coaxially, and the lift shaft is rotatably connected On the frame, the lift gear is coaxially fixed on the lift shaft, the transmission gear is rotatably connected between the drop shaft and the lift shaft, and the transmission gear is meshed between the drop gear and the lift gear; The lifting rod is slidably connected to the frame, and the two sides of the lifting rod are respectively provided with a lowering meshing tooth and a lifting meshing tooth. There is a lift sector gear, the drop sector gear and the lift sector gear can be meshed with the drop gear and the lift gear respectively, and the radius of the drop sector gear is smaller than that of the lift sector gear. 2.根据权利要求1所述的一种边坡施工用开挖装置,其特征在于:所述开挖机构包括支撑架、汽油机和钻头,所述支撑架竖向滑动连接在机架上,汽油机固定在支撑架上,钻头转动连接在支撑架上,且汽油机的输出轴与钻头之间连接有联轴器,升降杆固定连接在支撑架上。2. The excavation device for side slope construction according to claim 1, wherein the excavation mechanism comprises a support frame, a gasoline engine and a drill bit, the support frame is vertically slidably connected to the frame, and the gasoline engine It is fixed on the support frame, the drill bit is rotatably connected to the support frame, a coupling is connected between the output shaft of the gasoline engine and the drill bit, and the lifting rod is fixedly connected to the support frame. 3.根据权利要求2所述的一种边坡施工用开挖装置,其特征在于:所述机架上固定有导向杆,支撑架上固定有连接环,所述连接环套设在导向杆外,且连接环可沿导向杆轴向滑动。3 . The excavation device for side slope construction according to claim 2 , wherein a guide rod is fixed on the frame, a connecting ring is fixed on the support frame, and the connecting ring is sleeved on the guide rod. 4 . and the connecting ring can slide axially along the guide rod. 4.根据权利要求3所述的一种边坡施工用开挖装置,其特征在于:所述机架的底部一端转动连接有滚轮,另一端固定有支脚。4 . The excavation device for side slope construction according to claim 3 , wherein one end of the bottom of the frame is rotatably connected with a roller, and the other end is fixed with a supporting foot. 5 . 5.根据权利要求4所述的一种边坡施工用开挖装置,其特征在于:所述支脚的底部设置有尖端。5 . The excavation device for side slope construction according to claim 4 , wherein a tip is provided at the bottom of the support foot. 6 . 6.根据权利要求5所述的一种边坡施工用开挖装置,其特征在于:所述机架的顶端固定有扶手。6 . The excavation device for side slope construction according to claim 5 , wherein a handrail is fixed on the top of the frame. 7 . 7.根据权利要求6所述的一种边坡施工用开挖装置,其特征在于:所述降程转轴远离降程齿轮的一端穿过机架并连接有驱动组件。7 . The excavation device for side slope construction according to claim 6 , wherein one end of the lowering shaft away from the lowering gear passes through the frame and is connected with a drive assembly. 8 . 8.根据权利要求7所述的一种边坡施工用开挖装置,其特征在于:所述驱动组件为驱动电机,驱动电机的输出轴与降程转轴之间连接有联轴器。8 . The excavation device for side slope construction according to claim 7 , wherein the driving component is a driving motor, and a coupling is connected between the output shaft of the driving motor and the lowering shaft. 9 . 9.根据权利要求7所述的一种边坡施工用开挖装置,其特征在于:所述驱动组件包括同轴固接在降程转轴上的驱动轮,驱动轮上固定有把手。9 . The excavation device for side slope construction according to claim 7 , wherein the driving assembly comprises a driving wheel that is coaxially fixed on the lowering shaft, and a handle is fixed on the driving wheel. 10 .
CN202110625346.0A 2021-06-04 2021-06-04 Excavation device is used in side slope construction Withdrawn CN113338799A (en)

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CN202110625346.0A CN113338799A (en) 2021-06-04 2021-06-04 Excavation device is used in side slope construction

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CN202110625346.0A CN113338799A (en) 2021-06-04 2021-06-04 Excavation device is used in side slope construction

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Application publication date: 20210903