阅读说明：本技术 一种具有预挖坑功能的高速公路防护栏安装用垂直打桩机 (Vertical pile driver with pre-pit digging function for installing highway protective guard ) 是由 陈肖云 于 2020-12-29 设计创作，主要内容包括：本发明公开了防护栏安装设备技术领域的一种具有预挖坑功能的高速公路防护栏安装用垂直打桩机,包括移动机座,所述配重箱左侧安装有预挖坑组件,所述升降板底部中心焊接有打桩组件,所述安装架右侧底部焊接有桩基对心组件,所述配重箱顶部通过胶水粘接有橡胶缓冲层,由于伸缩缸带动冲击块下锤的力度小于液压缸下锤的力度,完成挖坑和桩基的预埋后,首先使用液压缸进行锤击,这种锤击力度较大,是初步锤击,快速将桩基打入地底,在桩基锤击到合适高度前,关闭液压缸,启动伸缩缸,进行轻度锤击,将桩基缓慢锤入地面,可避免液压缸锤击力度过大,造成桩基下锤长度过大,造成桩基漏出部分较短,无法完成后续的护栏安装,保证桩基伸出的长度相同。(The invention discloses a vertical pile driver with a pre-digging function for installing highway protective guards in the technical field of protective guard installation equipment, which comprises a moving base, wherein a pre-digging component is installed on the left side of a weight box, a pile driving component is welded at the center of the bottom of a lifting plate, a pile foundation centering component is welded at the bottom of the right side of an installation frame, a rubber buffer layer is bonded at the top of the weight box through glue, the force of a hammer under the driving of a telescopic cylinder is smaller than that of a hammer under a hydraulic cylinder, after digging and pre-embedding of a pile foundation are completed, the hydraulic cylinder is firstly used for hammering, the hammering force is larger, the hammering is preliminary hammering, the pile foundation is quickly driven into the ground, the hydraulic cylinder is closed before the pile foundation is hammered to a proper height, the telescopic cylinder is started, slight hammering is carried out, the pile foundation is slowly hammered into the ground, the overlarge hammering force of the, the part of the pile foundation that leaks is short, subsequent guardrail installation can not be completed, and the length of the pile foundation extending out is ensured to be the same.)

1. The utility model provides a perpendicular pile driver is used in installation of highway rail guard with dig hole function in advance, includes mobile frame (1), weight box (2), hydraulic landing gear (6) and perpendicular pile subassembly (4) are installed from left to right in mobile frame (1) top, its characterized in that: the right side of hydraulic pressure undercarriage (6) is connected on perpendicular pile subassembly (4), set weight box (2) left side is installed and is dug pit subassembly (3) in advance, perpendicular pile subassembly (4) is including articulating mounting bracket (41) on mobile frame (1), mounting bracket (41) right side top welding has roof (47), two sets of pneumatic cylinder (42) about roof (47) bottom welding has, and is two sets of pneumatic cylinder (42) bottom welding has lifter plate (43), lifter plate (43) bottom center welding has pile subassembly (44), rib board (45) have all been welded to both sides around pile subassembly (44), rib board (45) top welding is in lifter plate (43) bottom, pile foundation mounting bracket (41) right side bottom welding has heart subassembly (46), mobile frame (1) right side welding has supplementary ring (5), the top of the weight box (2) is bonded with a rubber buffer layer (7) through glue.

2. The vertical pile driver for installing the expressway protective fence with the pre-pit digging function as claimed in claim 1, wherein: the piling assembly (44) includes a housing (4401) welded to the bottom of the riser (43), a lifting plate (4405) is movably inserted at the top of the inner cavity of the shell (4401), a telescopic cylinder (4406) is welded at the center of the bottom of the lifting plate (4405), the bottom of the telescopic cylinder (4406) is connected with a movable block (4407), the front side and the rear side of the shell (4401) are both provided with a limiting groove (4408), the limiting grooves (4408) are internally provided with limiting blocks (4409) in a sliding manner, two groups of limiting blocks (4409) are arranged on the right side, the limiting block (4409) is fixed on the movable block (4407), the bottom of the movable block (4407) extends to the lower part of the shell (4401) and is fixed with an impact block (4404), strike piece (4404) top four corners and all be provided with guide bar (4403), two sets of connecting block (4402) about guide bar (4403) outer wall cover is equipped with, connecting block (4402) are fixed on shell (4401).

3. Vertical pile driver for installing a guard rail of a highway with a pre-pit digging function as claimed in claim 2, wherein: motor (4413) are installed at shell (4401) top inner wall center, connecting gear (4414) are installed to motor (4413) bottom, rotary drum (4415) are all installed through the bearing in the left and right sides of shell (4401) top inner wall, rotary drum (4415) inner chamber screw thread cover is equipped with lead screw (4412), rotary drum (4415) outer wall bottom is provided with driven gear (4416), driven gear (4416) and the relative one side meshing of connecting gear (4414), lift plate (4405) are fixed to be established on lead screw (4412) in the cover, supplementary gear (4410) have all been welded to the movable block (4407) left and right sides, shell (4401) left and right sides inner wall all is equipped with rack (4411), rack (4411) and the relative one side meshing of supplementary gear (4410).

4. Vertical pile driver for installing a highway protective guard with pre-pit digging function as claimed in claim 3, wherein: the pile foundation centering assembly (46) comprises a cylinder body (4601), connecting pieces (4602) are welded at the top and the bottom of the left side of the cylinder body (4601), the left sides of two groups of connecting pieces (4602) are fixed on a mounting frame (41), an annular groove is formed in the middle of the outer wall of the cylinder body (4601), an annular movable block (4604) is arranged in the annular groove in a sliding mode, a lower gear ring (4606) is arranged at the bottom of the annular movable block (4604), three groups of mounting holes are formed in an annular array at the bottom of the outer wall of the cylinder body (4601), a rotating rod (4608) is mounted in each mounting hole through a bearing, a movable gear (4609) is fixed at one end, away from the center of the annular movable block (4604), the top of the movable gear (4609) is meshed with the bottom of the lower gear ring (4606), an operating handle (4607) is arranged in an annular array, the outer wall of the inner cavity part of the annular movable block (4604) of the rotating rod (4608) is sleeved with a U-shaped push rod (4612), one side, close to the center of the annular movable block (4604), of the U-shaped push rod (4612) is fixed with an arc-shaped clamping block (4613), two sides of the joint of the annular movable block (4604) and the rotating rod (4608) are respectively provided with a jack, a limiting rod (4610) is movably inserted in each jack, one end of each limiting rod (4610) is fixed to the arc-shaped clamping block (4613), the annular fixed block (4603) is fixedly sleeved above the joint of the cylinder (4601) and the annular movable block (4604), the annular array at the top of the annular fixed block (4603) is provided with a positioning hole (4611), a locking bolt (4605) is sleeved in each positioning hole (4611), and a connecting screw hole matched with the locking bolt (4605) is formed in the top.

5. Vertical pile driver for installing a highway protective guard with pre-pit digging function according to claim 4, characterized in that: the pre-pit digging assembly (3) comprises an installation shell (301) fixed on a weight box (2), the left side and the right side of the installation shell (301) are provided with grooves, an upper group of sliding blocks (308) and a lower group of sliding blocks (308) are arranged in the grooves in a sliding mode, a lifting frame (309) is movably inserted in the bottom of an inner cavity of the installation shell (301), the sliding blocks (308) are welded on the lifting frame (309), a driving motor (310) is installed at the top of the inner cavity of the lifting frame (309), bearings are arranged in the middle of the front side and the rear side of the lifting frame (309), a rotating shaft (307) is installed in the inner rings of the two groups of bearings, a cam (311) is arranged in the middle of the outer wall of the rotating shaft (307), a transmission gear (312) is installed on the front side of the outer wall of the rotating shaft (307) and on the front side, arc kicking block (313) top and cam (311) bottom laminating, the welding of lift frame (309) inner chamber bottom has solid fixed ring (314), gu fixed ring (314) top annular array is provided with three groups of jacks, and the jack internalization is inserted and is equipped with guide arm (317), guide arm (317) top and arc kicking block (313) bottom fixed connection, guide arm (317) outer wall cover is equipped with supporting spring (318), the both ends of supporting spring (318) are connected with arc kicking block (313) and solid fixed ring (314) respectively, rotating electrical machines (315) are installed at arc kicking block (313) bottom center, heliciform cutter (316) are installed to rotating electrical machines (315) bottom, heliciform cutter (316) and rotating electrical machines (315) all are located solid fixed ring (314) inboardly.

6. Vertical pile driver for installing a highway protective guard with pre-pit digging function according to claim 5, characterized in that: install shell (301) top center is provided with the screw, and threaded bush is equipped with threaded rod (302) in the screw, threaded rod (302) bottom and lift frame (309) top are passed through the bearing and are connected, install shell (301) top four corners and all be provided with the jack, and the jack internalization is inserted and is equipped with slide bar (319), slide bar (319) bottom is fixed at lift frame (309) top, threaded rod (302) top welding has carousel (303), the left side welding of installing shell (301) top and threaded rod (302) junction has connecting plate (304), the equidistance is provided with the screw about connecting plate (304) left side, and threaded bush is equipped with bolt (305) in the screw, carousel (303) outer wall be provided with bolt (305) matched with constant head tank (306).

Technical Field

The invention relates to the technical field of protective guard mounting equipment, in particular to a vertical pile driver with a pre-digging function for mounting a highway protective guard.

Background

When installing highway's guardrail, need squeeze into the pile foundation on the road surface, then install the guardrail on the pile foundation, especially squeeze into the straightness that hangs down of pile foundation (pile foundation installation specification is unanimous, the guardrail just need not adjust when the field installation), can guarantee the convenience of installation guardrail, consequently when squeezing into the pile foundation, in order to guarantee the perpendicular of pile foundation, need the workman to hand the pile foundation and carry out the auxiliary operation, but the mode of hand pile foundation, the security is low when piling, for this reason, we provide a perpendicular pile driver is used in highway rail guard installation with dig hole function in advance.

Disclosure of Invention

The invention aims to provide a vertical pile driver with a pre-digging function for installing a highway protective guard, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a vertical pile driver with pre-pit digging function for installing the protective fence on expressway is composed of a movable machine base, the top of the movable machine base is provided with a weight box, a hydraulic landing gear and a vertical piling component from left to right, the right side of the hydraulic landing gear is connected to the vertical piling component, the left side of the weight box is provided with a pre-digging component, the vertical piling component comprises a mounting rack hinged on the movable base, a top plate is welded at the top of the right side of the mounting rack, the bottom of the top plate is welded with a left group of hydraulic cylinders and a right group of hydraulic cylinders, the bottoms of the two groups of hydraulic cylinders are welded with lifting plates, the center of the bottom of the lifting plate is welded with a piling component, the front side and the rear side of the piling component are both welded with ribbed plates, the top of the ribbed plate is welded at the bottom of the lifting plate, the bottom of the right side of the mounting rack is welded with a pile foundation centering assembly, the right side of the movable machine base is welded with an auxiliary ring, and the top of the counterweight box is bonded with a rubber buffer layer through glue.

Further, the pile subassembly is including welding the shell in the lifter plate bottom, shell inner chamber top activity is inserted and is equipped with the lift plate, the welding of lift plate bottom center has the telescoping cylinder, the telescoping cylinder bottom is connected with the movable block, both sides all are provided with the spacing groove around the shell, it is provided with the stopper to slide in the spacing groove, the stopper is provided with two sets ofly at the right side, the stopper is fixed on the movable block, the movable block bottom extends to the shell below and is fixed with the kicking block, kicking block top four corners all is provided with the guide bar, two sets of connecting blocks about the guide bar outer wall cover is equipped with, the connecting block is fixed on the shell.

Further, the motor is installed at shell top inner wall center, connecting gear is installed to the motor bottom, the rotary drum is all installed through the bearing in the left and right sides of shell top inner wall, rotary drum inner chamber thread bush is equipped with the lead screw, rotary drum outer wall bottom is provided with driven gear, driven gear meshes with the relative one side of connecting gear, the fixed cover of lift plate is established on the lead screw, auxiliary gear has all been welded to the movable block left and right sides, shell left and right sides inner wall all is equipped with the rack, the rack meshes with the relative one side of auxiliary gear.

Further, the pile foundation centering assembly comprises a barrel body, connecting pieces are welded at the top and the bottom of the left side of the barrel body, the left sides of the two connecting pieces are fixed on a mounting frame, an annular groove is formed in the middle of the outer wall of the barrel body, an annular movable block is arranged in the annular groove in a sliding mode, a lower gear ring is arranged at the bottom of the annular movable block, three groups of mounting holes are formed in the annular array at the bottom of the outer wall of the barrel body, a rotating rod is mounted in each mounting hole through a bearing, a movable gear is fixed at one end, away from the center of the annular movable block, of the rotating rod, the top of the movable gear is meshed with the bottom of the lower gear ring, an operating handle is arranged in the annular array at the outer wall of the annular movable block, an external thread is arranged on the, the utility model discloses a locking bolt, including barrel, annular movable block, dwang, barrel, annular fixed block, annular movable block top annular array is provided with the locating hole, the both sides of annular movable block and dwang junction all are provided with the jack, and the activity is inserted in the jack and is equipped with the gag lever post, the one end of gag lever post is fixed on the arc clamp splice, the fixed cover in top of barrel and annular movable block junction is equipped with annular fixed block, annular fixed block top annular array is provided with the locating hole, the threaded sleeve in the locating hole is.

Further, the pre-pit digging component comprises a mounting shell fixed on the weight box, the left side and the right side of the mounting shell are respectively provided with a slot, an upper group of sliding blocks and a lower group of sliding blocks are arranged in the slots in a sliding manner, a lifting frame is movably inserted in the bottom of the inner cavity of the mounting shell, the sliding blocks are welded on the lifting frame, a driving motor is installed at the top of the inner cavity of the lifting frame, bearings are arranged in the middle parts of the front side and the rear side of the lifting frame, rotating shafts are installed in the two groups of bearing inner rings, a cam is arranged in the middle part of the outer wall of each rotating shaft, transmission gears are installed on the front sides of the outer wall of each rotating shaft and the driving motor, chains are sleeved on the outer walls of the two groups of transmission gears, an arc-shaped top block is, the jack is downthehole activity is inserted and is equipped with the guide arm, guide arm top and arc kicking block bottom fixed connection, guide arm outer wall cover is equipped with supporting spring, supporting spring's both ends are connected with arc kicking block and solid fixed ring respectively, rotating electrical machines is installed at arc kicking block bottom center, the heliciform cutter is installed to the rotating electrical machines bottom, heliciform cutter and rotating electrical machines all are located solid fixed ring inboard.

Further, installation shell top center is provided with the screw, and screw thread bush is equipped with the threaded rod, the threaded rod bottom passes through the bearing with the elevator frame top and is connected, installation shell top four corners all is provided with the jack, and the jack internalization is inserted and is equipped with the slide bar, the slide bar bottom is fixed at the elevator frame top, the welding of threaded rod top has the carousel, the welding of installation shell top and the left side of threaded rod junction has the connecting plate, the equidistance is provided with the screw about the connecting plate left side, and screw thread bush is equipped with the bolt, the carousel outer wall is provided with the constant head tank.

Compared with the prior art, the invention has the beneficial effects that:

1. the method comprises the steps that a pre-pit is dug before piling, when the depth of the pit is adjusted, a threaded rod is rotated to enable a lifting frame to be driven to move up and down, the initial height of a spiral cutter is changed, the depth of the pit is changed, then a driving motor and a rotating motor are started, the driving motor drives a transmission gear and a rotating shaft to rotate, the rotating shaft drives a cam to rotate, when a convex surface of the cam rotates to the bottom, an arc-shaped top block is pressed downwards, a supporting spring is extruded at the moment, when the convex surface leaves the bottom, the supporting spring can drive the arc-shaped top block to ascend and reset, the spiral cutter which rotates in the process is driven to slide up and down, the rotating motor drives the spiral cutter to rotate, punching work can be conducted, manual operation of workers is not needed after pre-pit;

2. maintaining verticality during pile driving, starting a hydraulic undercarriage after a pot hole is dug, jacking an installation frame to enable the installation frame to be vertical to the ground, inserting a pile foundation into a pile foundation centering assembly, an auxiliary ring and the pot hole from top to bottom at the moment, enabling the pile foundation to be vertically placed by matching the pile foundation centering assembly, the auxiliary ring and the pot hole, and ensuring the verticality of the pile foundation;

3. less pile of error, because the telescopic cylinder drives the dynamics that strikes the hammer under the piece and is less than the dynamics of hammer under the pneumatic cylinder, accomplish the pre-buried back of digging pit and pile foundation, at first use the pneumatic cylinder to carry out the hammering, this kind of hammering power degree is great, be preliminary hammering, squeeze into the ground end with the pile foundation fast, before pile foundation hammering is suitable high, close the pneumatic cylinder, start the telescopic cylinder, slight hammering carries out, slowly hammer into ground with the pile foundation, can avoid the hammering pneumatic cylinder dynamics too big, cause the pile foundation length of hammering down too big, it is shorter to cause the pile foundation to spill the part, can't accomplish subsequent guardrail installation, when accomplishing the pile, the length that guarantees the pile foundation and stretches out is the same, reduce the error of pile driving.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the pile driving assembly of the present invention;

FIG. 3 is a schematic structural view of a pile foundation centering assembly according to the present invention;

FIG. 4 is a schematic view of the connection between the cylinder and the annular fixing block according to the present invention;

FIG. 5 is a schematic diagram of a pre-pit assembly of the present invention.

In the figure: 1. moving the base; 2. a weight box; 3. pre-pit digging components; 301. mounting a shell; 302. a threaded rod; 303. a turntable; 304. a connecting plate; 305. a bolt; 306. positioning a groove; 307. a rotating shaft; 308. a slider; 309. a lifting frame; 310. a drive motor; 311. a cam; 312. a transmission gear; 313. an arc-shaped jacking block; 314. a fixing ring; 315. a rotating electric machine; 316. a helical cutter; 317. a guide bar; 318. a support spring; 319. a slide bar; 4. a vertical pile driving assembly; 41. a mounting frame; 42. a hydraulic cylinder; 43. a lifting plate; 44. a pile driving assembly; 4401. a housing; 4402. connecting blocks; 4403. a guide bar; 4404. an impact block; 4405. lifting the plate; 4406. a telescopic cylinder; 4407. a movable block; 4408. a limiting groove; 4409. a limiting block; 4410. an auxiliary gear; 4411. a rack; 4412. a screw rod; 4413. a motor; 4414. a connecting gear; 4415. a rotating drum; 4416. a driven gear; 45. a rib plate; 46. a pile foundation centering assembly; 4601. a barrel; 4602. a connecting member; 4603. an annular fixed block; 4604. an annular movable block; 4605. locking the bolt; 4606. a lower gear ring; 4607. an operating handle; 4608. rotating the rod; 4609. a movable gear; 4610. a limiting rod; 4611. positioning holes; 4612. a U-shaped push rod; 4613. an arc-shaped clamping block; 4614. (ii) a 47. A top plate; 5. an auxiliary ring; 6. a hydraulic landing gear; 7. a rubber cushion layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a vertical pile driver with a pre-pit digging function for installing a highway protective fence comprises a movable base 1, wherein a weight box 2, a hydraulic landing gear 6 and a vertical pile driving assembly 4 are installed on the top of the movable base 1 from left to right, the hydraulic landing gear 6 belongs to the prior art and mainly adjusts the inclination angle of a mounting frame 41, the mounting frame 41 leans against the weight box 2 during movement, the hydraulic landing gear 6 jacks up the mounting frame 41 during use to enable the pile driving assembly 44 to vertically pile, the right side of the hydraulic landing gear 6 is connected to the vertical pile driving assembly 4, a pre-pit digging assembly 3 is installed on the left side of the weight box 2, the vertical pile driving assembly 4 comprises the mounting frame 41 hinged to the movable base 1, a top plate 47 is welded on the top of the right side of the mounting frame 41, a left hydraulic cylinder group and a right hydraulic cylinder group 42 are welded on the bottom of the top plate 47, a lifting plate 43 is welded on, the pile driving assembly 44 is welded at the center of the bottom of the lifting plate 43, rib plates 45 are welded on the front side and the rear side of the pile driving assembly 44, the rib plates 45 can reinforce the connection of the pile driving assembly 44, the top of the rib plates 45 is welded at the bottom of the lifting plate 43, the pile foundation centering assembly 46 is welded at the bottom of the right side of the mounting frame 41, the auxiliary ring 5 is welded at the right side of the moving base 1, the rubber buffer layer 7 is bonded at the top of the weight box 2 through glue, and the impact and abrasion of the mounting frame 41 on;

referring to fig. 2, the pile driving assembly 44 includes a housing 4401 welded to the bottom of the lifting plate 43, a lifting plate 4405 is movably inserted into the top of an inner cavity of the housing 4401, a telescopic cylinder 4406 is welded to the center of the bottom of the lifting plate 4405, the telescopic cylinder 4406 drives a movable block 4407 to descend, so that an impact block 4404 impacts the top of a pile foundation, the pile foundation is driven into the housing, the bottom of the telescopic cylinder 4406 is connected with the movable block 4407, limiting grooves 4408 are respectively arranged on the front side and the rear side of the housing 4401, limiting blocks 4409 are slidably arranged in the limiting grooves 4408, two groups of limiting blocks 4409 are arranged on the right side, the limiting blocks 4409 are fixed on the movable block 4407, the bottom of the movable block 4407 extends to the lower portion of the housing 4401 to be fixed with the impact block 4404, four corners on the top of the impact block 4404 are respectively provided with guide rods 4403;

referring to fig. 2, a motor 4413 is installed at the center of the inner wall of the top of the housing 4401, a connecting gear 4414 is installed at the bottom of the motor 4413, rotary drums 4415 are installed on the left and right sides of the inner wall of the top of the housing 4401 through bearings, a screw 4412 is threaded in the inner cavity of the rotary drum 4415, the motor 4413 drives the connecting gear 4414, a driven gear 4416 and the rotary drum 4415 to rotate, the rotary drum 4415 rotates to enable the screw 4412 to extend and retract, initial positions of the movable block 4407 and the impact block 4404 are adjusted to facilitate insertion of a pile foundation from top to bottom, the force of the impact block 4404 driven by the telescopic cylinder 4406 is smaller than that of a hydraulic cylinder 42, when pile driving is performed, the hydraulic cylinder 42 is used for hammering, the hammering force is larger, which is a preliminary hammering, when hammering is completed soon, the telescopic cylinder 4406 is started for slight hammering, which can avoid overlarge hammering force and cause overlarge pile foundation hammering, and leakage, the driven gear 44, the driven gear 4416 is meshed with the opposite side of the connecting gear 4414, the lifting plate 4405 is fixedly sleeved on the screw rod 4412, auxiliary gears 4410 are welded on the left side and the right side of the movable block 4407, racks 4411 are arranged on the inner walls of the left side and the right side of the shell 4401, the lifting stability of the movable block 4407 is improved, vertical impact is kept, and the racks 4411 are meshed with the opposite side of the auxiliary gear 4410;

referring to fig. 3-4, the pile foundation centering assembly 46 includes a cylinder 4601, connectors 4602 are welded at the top and bottom of the left side of the cylinder 4601, the left sides of two sets of connectors 4602 are fixed on a mounting frame 41, an annular groove is provided in the middle of the outer wall of the cylinder 4601, an annular movable block 4604 is slidably provided in the annular groove, a lower ring gear 4606 is provided at the bottom of the annular movable block 4604, three sets of mounting holes are provided in an annular array at the bottom of the outer wall of the cylinder 4601, a rotating rod 4608 is installed in each mounting hole through a bearing, a movable gear 4609 is fixed at one end of the rotating rod 4608, which is far away from the center of the annular movable block 4604, the top of the movable gear 4609 is engaged with the bottom of the lower ring gear 4606, an operating handle 4607 is provided in an annular array at the outer wall of the rotating rod 4608, which is, the two sides of the joint of the annular movable block 4604 and the rotating rod 4608 are respectively provided with an insertion hole, a limiting rod 4610 is movably inserted in the insertion holes, one end of the limiting rod 4610 is fixed on the arc-shaped clamping block 4613, the pile foundation is firstly inserted into the pile foundation from top to bottom, after the pile foundation is inserted, the annular movable block 4604 is rotated through the operating handle 4607, the lower gear ring 4606 drives the movable gear 4609 and the rotating rod 4608 to rotate, at the moment, the U-shaped push block 4612 and the arc-shaped clamping block 4613 are driven to approach the pile foundation to clamp the pile foundation, a ball is arranged on one side opposite to the arc-shaped clamping block 4613, the ball can reduce the friction force between the arc-shaped clamping block 4413 and the pile foundation, the hammering operation of the pile foundation assembly 44 is not influenced, the annular fixed block 4603 is fixedly sleeved above the joint of the cylindrical pile driving assembly 4601 and the annular movable block 4604, the annular array on the top of the annular fixed block 4603 is provided with positioning holes 4611, after the centering clamping of the pile foundation is finished, the locking bolts 4605 are screwed into the positioning holes 4611 to fix the annular movable block 4404, so that the clamped pile foundation is prevented from loosening;

referring to fig. 5, the pre-pit digging assembly 3 includes a mounting case 301 fixed on the weight box 2, the left and right sides of the mounting case 301 are provided with slots, an upper set of sliding blocks 308 and a lower set of sliding blocks 308 are slidably disposed in the slots, a lifting frame 309 is movably inserted in the bottom of the inner cavity of the mounting case 301, the sliding blocks 308 are welded on the lifting frame 309, a driving motor 310 is installed on the top of the inner cavity of the lifting frame 309, bearings are disposed in the middle portions of the front and rear sides of the lifting frame 309, a rotating shaft 307 is installed in the inner ring of the two sets of bearings, a cam 311 is disposed in the middle portion of the outer wall of the rotating shaft 307, a transmission gear 312 is installed on the front side of the outer wall of the rotating shaft 307 and the front side of the driving motor 310, a chain is sleeved on the outer wall of the two sets of transmission, when the convex surface of the cam 311 rotates to the bottom, the arc-shaped top block 313 is pressed downwards, the supporting spring 318 is extruded at the moment, when the convex surface leaves the bottom, the supporting spring 318 can drive the arc-shaped top block 313 to ascend and reset, in the process, the rotating spiral cutter 316 is driven to slide up and down to perform pit digging work, the bottom of the inner cavity of the lifting frame 309 is welded with a fixed ring 314, three groups of jacks are arranged at the top of the fixed ring 314 in an annular array manner, guide rods 317 are movably inserted in the jacks, the tops of the guide rods 317 are fixedly connected with the bottoms of arc-shaped top blocks 313, supporting springs 318 are sleeved on the outer walls of the guide rods 317, two ends of each supporting spring 318 are respectively connected with the arc-shaped top blocks 313 and the fixed ring 314, a rotating motor 315 is installed at the center of the bottom of each arc-shaped top block 313, the spiral cutter 316 is installed at the bottom of, the spiral cutter 316 and the rotating motor 315 are both positioned inside the fixed ring 314;

referring to fig. 5, a screw hole is formed in the center of the top of a mounting shell 301, a threaded rod 302 is sleeved in the screw hole, the bottom of the threaded rod 302 is connected with the top of a lifting frame 309 through a bearing, four corners of the top of the mounting shell 301 are provided with jacks, sliding rods 319 are movably inserted in the jacks to maintain the lifting stability of the lifting frame 309, the bottoms of the sliding rods 319 are fixed on the top of the lifting frame 309, a rotary plate 303 is welded on the top of the threaded rod 302, a connecting plate 304 is welded on the left side of the joint of the top of the mounting shell 301 and the threaded rod 302, screw holes are formed in the left side of the connecting plate 304 at equal intervals from top to bottom, a bolt 305 is sleeved in the screw hole, a positioning groove 306 matched with the bolt 305 is formed in the outer wall of the rotary plate 303, when the pit depth is adjusted, the threaded rod 302 is rotated to, avoiding false operation of the lifting frame 309;

example (b):

1. pre-digging before piling: when the pit digging depth is adjusted, the threaded rod 302 is rotated, the lifting frame 309 is driven to move up and down, the initial height of the spiral cutter 316 is changed, the pit digging depth is changed, after the adjustment is completed, the rotating disc 303 and the threaded rod 302 can be fixed by screwing in the bolt 305, then the driving motor 310 and the rotating motor 315 are started, the driving motor 310 drives the transmission gear 312 and the rotating shaft 307 to rotate, the rotating shaft 307 drives the cam 311 to rotate, when the convex surface of the cam 311 rotates to the bottom, the arc-shaped top block 313 is pressed downwards, the supporting spring 318 is extruded at the moment, when the convex surface leaves the bottom, the supporting spring 318 can drive the arc-shaped top block 313 to ascend and reset, in the process, the rotary spiral cutter 316 is driven to slide up and down, and the rotating motor 315 drives the spiral cutter 316 to rotate, so that the;

2. pile foundation pre-burying: after the work of the step 1 is finished, the hydraulic undercarriage 6 is started, the mounting frame 41 is jacked up, the mounting frame 41 is perpendicular to the ground, the pile foundation is inserted into the pile foundation centering assembly 46, the auxiliary ring 5 and the pot hole from top to bottom, before the pile foundation is inserted into the pile foundation centering assembly 46, the auxiliary ring 5 and the pot hole, the motor 4413 drives the connecting gear 4414, the driven gear 4416 and the rotary drum 4415 to rotate, the rotary drum 4415 rotates to enable the screw rod 4412 to stretch out and draw back, the initial positions of the movable block 4407 and the impact block 4404 are adjusted, and the pile foundations with different;

3. piling: because the dynamics that the telescopic cylinder 4406 drove hammer under impact block 4404 is less than the dynamics that the pneumatic cylinder 42 hammered down, accomplish above-mentioned step after, at first use pneumatic cylinder 42 to carry out the hammering, this kind of hammering power degree is great, be preliminary hammering, squeeze into the ground end with the pile foundation fast, before the pile foundation hammering is to suitable height, close pneumatic cylinder 42, start telescopic cylinder 4406, carry out slight hammering, slowly hammer into the ground with the pile foundation, can avoid pneumatic cylinder 42 hammering dynamics too big, cause the pile foundation to drop hammer length too big, it is shorter to cause the pile foundation to spill the part, can't accomplish subsequent guardrail installation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.