CN112761151A

CN112761151A - Impact type pile driving mechanism and pile driver thereof

Info

Publication number: CN112761151A
Application number: CN202110091727.5A
Authority: CN
Inventors: 苗国华; 迟峰; 王永; 刘淑强
Original assignee: Shandong Lingong Construction Machinery Co Ltd
Current assignee: Shandong Lingong Construction Machinery Co Ltd
Priority date: 2021-01-23
Filing date: 2021-01-23
Publication date: 2021-05-07

Abstract

The invention discloses an impact type pile driving mechanism and a pile driver thereof, and belongs to the field of engineering machinery. The hydraulic clamping device mainly comprises a guide mechanism, a hydraulic cylinder and a clamping hammer head, wherein the clamping hammer head capable of moving up and down along the guide mechanism is arranged below the guide mechanism, the hydraulic cylinder is installed between the guide mechanism and the clamping hammer head and connected with the guide mechanism, and the end of a piston rod of the hydraulic cylinder corresponds to the clamping hammer head. The invention has the advantages of convenient processing, manufacture and assembly, only vertical force and no horizontal force during impact vibration, adjustable impact frequency and impact force and low use cost. The invention is mainly used for piling.

Description

Impact type pile driving mechanism and pile driver thereof

Technical Field

The invention belongs to the field of engineering machinery, and particularly relates to an impact type pile driving mechanism and a pile driver thereof.

Background

Pile driver based on crawler-type excavator transformation utilizes the high-speed rotation of tup eccentric mechanism, produces periodic exciting force to produce high-frequency vibration, and will vibrate and pass through the tup centre gripping part and transmit for the pile body, along with the vibration that produces, the soil body structure around the pile changes because of vibrating, and soil texture liquefaction around the pile body, and the structure between the soil granule takes place disorderly, and instantaneous strength reduces, causes the "fluidization" phenomenon of soil structure. So as to reduce the friction force between the pile and the soil body, and then the pile is driven into the soil by the common acting force of the downward pressure of the excavator, the self weight of the pile driver and the pile and the like.

The existing piling mechanism is of a gear box structure, 2 or more vibration eccentric shafts are arranged in the gear box, the vibration eccentric shafts are arranged in the gear box through bearings, gear oil is arranged in the gear box, and a hydraulic motor drives the vibration eccentric shafts to rotate at a high speed to generate exciting force. The exciting force of the hammer head of the pile driving mechanism is related to the eccentricity of the vibration eccentric mechanism and the rotating speed of the vibration eccentric shaft, and in order to ensure that the exciting force vertically acts on the hammer head and a pile in the pile driving process, 2 or more (even number) vibration eccentric shafts are symmetrically arranged in the gear box, so that the exciting force generated by the vibration eccentric shafts is overlapped and reduced to 0 in the horizontal direction and is overlapped in the vertical direction.

In order to avoid the horizontal disturbance of the horizontal exciting force on the hammer head and the pile and prevent the bad verticality of the pile or the horizontal disturbance and distortion of the peripheral pile in the piling process, the horizontal exciting force must be 0. This results in that 2 or more (even number) vibrating eccentric shafts must be symmetrically arranged and the eccentricity equal. However, in actual production, due to processing and manufacturing deviation, assembly deviation and the like, complete symmetry of the vibrating eccentric shaft and equal eccentricity of the vibrating eccentric shaft are difficult to guarantee, and the high-speed rotation of the vibrating eccentric shaft has high requirements on bearing reliability and gear box lubricating oil. Meanwhile, the exciting force generated by the vibrating eccentric shaft is superposed in the vertical direction, but the exciting force in the vertical direction is a periodic sine wave, the effective acting force of the exciting force has periodic change, and the equivalent acting force is lower than the maximum exciting force.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the impact type pile driving mechanism and the pile driver thereof are convenient to process, manufacture and assemble, only vertical force and horizontal force are provided during impact vibration, the impact frequency and the impact force are adjustable, and the use cost is low.

The impact type pile driving mechanism comprises a guide mechanism, a hydraulic cylinder and a clamping hammer head, wherein the clamping hammer head capable of moving up and down along the guide mechanism is arranged below the guide mechanism, the hydraulic cylinder is installed between the guide mechanism and the clamping hammer head and connected with the guide mechanism, and the piston rod end of the hydraulic cylinder corresponds to the clamping hammer head.

Preferably, the guide mechanism comprises a guide plate, a sliding plate capable of sliding up and down is arranged on the guide plate, guide blocks are arranged at two ends of the sliding plate, a sliding groove matched with the guide blocks is arranged on the guide plate, and a cylinder body of the hydraulic cylinder is fixedly connected with the sliding plate.

Preferably, the centre gripping tup includes fixed connection's last supporting box and tup body, goes up supporting box and deflector fixed connection, tup body and grip block fixed connection, is equipped with the clamp plate on tup body and the grip block respectively, is equipped with the centre gripping pneumatic cylinder between tup body and the grip block, and the telescopic link of centre gripping pneumatic cylinder is connected with the clamp plate of grip block side, and the centre gripping pneumatic cylinder other end is articulated with the grip block.

Preferably, guiding mechanism includes fixed case and mounting panel, and fixed case top is connected with the mounting panel, and fixed case below is through direction spout and centre gripping tup swing joint, and the fixed incasement is arranged in to the pneumatic cylinder, and the cylinder body and the mounting panel of pneumatic cylinder are connected.

Preferably, the centre gripping tup includes fixed connection's tup body and grip block, is equipped with the clamp plate on tup body and the grip block respectively, is equipped with the centre gripping pneumatic cylinder between tup body and the grip block, and the telescopic link of centre gripping pneumatic cylinder is connected with the clamp plate of grip block side, and the centre gripping pneumatic cylinder other end is articulated with the grip block, is equipped with on the tup body with direction spout complex direction slider, is equipped with the impact groove on the tup body, the tailpiece of the piston rod of pneumatic cylinder be equipped with impact groove complex impact block.

Preferably, the lifting device further comprises a lifting frame and a fixing plate, the guide mechanism is connected with the fixing plate through a shock absorber and a fastener, a pin shaft and a second limiting block are arranged on two sides of the fixing plate respectively, a second sliding groove matched with the pin shaft is arranged on two sides of the lifting frame, and a limiting groove matched with the second limiting block is arranged on the inner side of the lifting frame.

Preferably, a rotatable support frame is arranged above the hanging bracket, a driving motor is mounted on the support frame, a gear is arranged on an output shaft of the driving motor, a rotary gear ring fixedly connected with the hanging bracket is arranged on the hanging bracket, and the gear is meshed with the rotary gear ring.

Preferably, a rotary joint is arranged between the support frame and the hanging frame, one end of the rotary joint is connected with the support frame, the other end of the rotary joint is connected with the hanging frame, a valve is arranged on the hanging frame, and the valve is respectively connected with the rotary joint and the hydraulic cylinder.

The pile driver comprises a pile driver body, a large arm, a middle arm and a small arm, wherein the pile driver body is provided with an upper frame hinged with the large arm, two ends of the middle arm are respectively hinged with one end of the large arm and one end of the small arm, and the other end of the small arm is provided with the impact type pile driving mechanism.

Preferably, the small arm is connected with the support frame, a first oil cylinder is arranged between the upper frame and the large arm of the pile driver body, a second oil cylinder is arranged between the large arm and the middle arm, and a third oil cylinder is arranged between the middle arm and the small arm.

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

1. the invention realizes the alternate hydraulic acting force of the hydraulic cylinder by utilizing the alternate switching of the hydraulic oil at the piston end and the rod end of the hydraulic cylinder, thereby driving the hammer head and the pile to form vibration with a certain frequency, realizing the adjustment of the impact frequency and the impact force by adjusting and controlling the switching frequency of the hydraulic oil at the piston end and the rod end of the hydraulic cylinder and the pressure setting of a hydraulic system of the whole machine, and avoiding the structure of a gear box in the prior art, namely realizing the vibration impact method by driving two or more (even number) eccentric shafts to rotate at high speed through a motor;

2. the impact vibration of the invention only has vertical force and no horizontal force, thereby avoiding horizontal vibration to the hammer head and the pile, avoiding the influence of the horizontal force on the verticality in the piling process, ensuring the verticality in the piling process more easily and reducing the loss to the adjacent pile;

3. the invention is convenient to process and assemble, does not need to generate exciting force through the high-speed rotation of the vibrating eccentric shaft, thereby avoiding increasing the process difficulty to reduce the processing, manufacturing and assembling deviation of 2 or more (even number) vibrating eccentric shafts for reducing the exciting force in the horizontal direction, simultaneously, does not need high-speed rotation and high-speed vibration of a bearing and gear oil, and reduces the maintenance cost and the daily use cost;

4. according to the invention, the acting force of the oil cylinder is changed by changing the pressure of the oil liquid supplied by the hydraulic cylinder, so that the exciting force is changed, and the independent control of the decoupling of the exciting force and the frequency is realized.

Drawings

FIG. 1 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 2 is a schematic structural view of a second embodiment of the invention during pile driving and pressing;

fig. 3 is a schematic structural view of a second embodiment of the present invention during pile pulling and lifting;

FIG. 4 is a schematic view of the construction of the sliding plate;

FIG. 5 is a schematic structural view of a second clamping hammer of the embodiment;

FIG. 6 is a schematic structural diagram according to a fourth embodiment of the present invention;

FIG. 7 is a schematic view of a fourth embodiment of the invention when driven down;

fig. 8 is a schematic structural view of a fourth embodiment of the present invention when pile pulling is performed;

fig. 9 is a schematic structural view of the pile driver of the present invention.

In the figure, 1, a drive motor; 101. a gear; 2. a support frame; 3. a valve; 4. a fixing plate; 401. a second limiting block; 402. a bump; 403. a pin shaft; 5. a hydraulic cylinder; 6. a shock absorber; 7. a guide mechanism; 701. a sliding plate; 702. a guide block; 703. a guide plate; 704. mounting a plate; 705. a fixed box; 706. a guide chute; 8. clamping the hammer head; 801. an upper support box; 802. a rib plate; 803. a clamping hydraulic cylinder; 804. pressing a plate; 805. a hammer head body; 806. a clamping plate; 807. a guide slider; 808. an impact groove; 809. a first limiting block; 9. a hanger; 901. a limiting groove; 902. a second chute; 904. a rotary gear ring; 10. a swivel joint; 11. piling; 12. a pile driver body; 13. a first cylinder; 14. a large arm; 15. a second cylinder; 16. a middle arm; 17. a third oil cylinder; 18. a small arm.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

the first embodiment is as follows: as shown in fig. 1, the impact pile driving mechanism comprises a guide mechanism 7, a hydraulic cylinder 5 and a clamping hammer 8, wherein the clamping hammer 8 capable of moving up and down along the guide mechanism 7 is arranged below the guide mechanism 7, the hydraulic cylinder 5 is arranged between the guide mechanism 7 and the clamping hammer 8, the hydraulic cylinder 5 is connected with the guide mechanism 7, and the piston rod end of the hydraulic cylinder 5 corresponds to the clamping hammer 8.

As shown in fig. 2 to 4, the guide mechanism 7 includes a guide plate 703 and a sliding plate 701, two ends of the sliding plate 701 are provided with guide blocks 702, the guide plate 703 is provided with a sliding slot engaged with the guide blocks 702, the sliding plate 701 can slide up and down along the guide plate 703, a cylinder body of the hydraulic cylinder 5 is fixedly connected with the sliding plate 701, and the hydraulic cylinder 5 slides up and down along the sliding slot of the guide plate 7 under the action of the guide blocks 702.

As shown in fig. 5, the clamping hammer 8 includes an upper supporting box 801 and a hammer body 805 which are fixedly connected, the upper supporting box 801 is fixedly connected with a guide plate 703 through a fastener, a rib plate 802 is arranged on the upper supporting box 801, the structural strength of the upper supporting box 801 can be improved by the rib plate 802, the hammer body 805 is fixedly connected with a clamping plate 806, a gap is arranged between the hammer body 805 and the clamping plate 806, pressing plates 804 are respectively arranged on the hammer body 805 and the clamping plate 806, a clamping hydraulic cylinder 803 is arranged between the hammer body 805 and the clamping plate 806, an expansion rod of the clamping hydraulic cylinder 803 is connected with the pressing plate 804 on the side of the clamping plate 806, and the other end of the clamping hydraulic cylinder 803 is hinged to the clamping plate 806. In operation, the pile 11 is placed between the two pressing plates 804, and the pressing plates 804 on the side of the clamping plate 806 clamp the pile 11 by pressing the pressing plates 804 against the hammer head 805 under the expansion and contraction action of the clamping hydraulic cylinder 803.

Example two: the clamping device is characterized by further comprising a hanging bracket 9 and a fixed plate 4, wherein the guide mechanism 7 is connected with the fixed plate 4 through a shock absorber 6 and a fastener, during installation, the sliding plate 701 is provided with a plurality of shock absorbers 6, the sliding plate 701 is fixedly connected with the fixed plate 4 through the shock absorbers 6 and bolts, the fixed plate 4, the shock absorbers 6 and the hydraulic cylinder 5 are arranged in an upper supporting box 801 on the clamping hammer head 8, two sides of the fixed plate 4 are respectively provided with a pin shaft 403 and a second limiting block 401, two sides of the hanging bracket 9 are provided with a second sliding groove 902 matched with the pin shaft 403, and the inner side of the hanging bracket 9; the fixing plate 4 is placed in the second sliding groove 902 of the hanging bracket 9 through the pin shafts 403 at the two ends, the second limiting blocks 401 at the two ends of the fixing plate 4 limit the swing of the fixing plate 4 and the hanging bracket 9 around the pin shafts 403 when the pile is driven and pressed down, so that the fixing plate 4, the hydraulic cylinder 5, the guide mechanism 7, the clamping hammer 8 and the pile 11 are kept perpendicular to the hanging bracket 9 in the pile driving process, and the verticality of the pile 11 can be guaranteed only by adjusting the large arm 14, the middle arm 16 and the small arm 18 of the pile driver to guarantee the verticality of the hanging bracket 9 in the pile driving process.

The fixed plate 4 is provided with a convex block 402, the convex block 402 on the fixed plate 4 limits the swing amplitude of the hanger 9, and the fixed plate 4 drives the guide mechanism 7, the clamping hammer 8 and the hydraulic cylinder 10 to swing and slide up and down by a certain amplitude around the sliding groove 902 in the hanger 9 through the shock absorber 6.

A rotatable supporting frame 2 is arranged above the hanging bracket 9, a driving motor 1 is installed on the supporting frame 2, a gear 101 is arranged on an output shaft of the driving motor 1, a rotary gear ring 904 fixedly connected with the hanging bracket 9 is arranged on the hanging bracket 9, and the gear 101 is meshed with the rotary gear ring 904; the gear 101 of hydraulic oil drive driving motor 1 output shaft is rotatory, thereby it is rotatory through the gyration ring gear 904 on the engaged with gallows 9, and then drive the relative rotation of gallows 9 and support frame 2, thereby it is rotatory to drive pneumatic cylinder 5, guiding mechanism 7 and centre gripping tup 8 through fixed plate 4, bumper shock absorber 6, realize the adjustment of 8 rotation angles of centre gripping tup, with the convenient pile of picking up, hang the stake and to the angular adjustment of stake in-process centre gripping tup 8 and stake 11, make things convenient for the operation construction.

A rotary joint 10 is arranged between the support frame 2 and the hanger 9, one end of the rotary joint 10 is connected with the support frame 2, the other end of the rotary joint is connected with the hanger 9, a valve 3 is arranged on the hanger 9, and the valve 3 is respectively connected with the rotary joint 10 and the hydraulic cylinder 10; the rest is the same as the first embodiment. The rotary joint 10 realizes the distribution of the oil path to the valve 3 in the rotating process of the hanger 9, avoids the winding of the pipeline, the valve 3 provides high-pressure hydraulic oil liquid switching to the piston end and the piston rod end of the hydraulic cylinder 5, realizes the extending and retracting actions of the piston rod of the hydraulic cylinder 5, and further impacts the clamping hammer 8 and the pile 11 to form vibration impact.

As shown in fig. 9, the pile driver comprises a pile driver body 12, a large arm 14, a middle arm 16 and a small arm 18, wherein the upper frame of the pile driver body 12 is hinged with the large arm 14, two ends of the middle arm 16 are respectively hinged with one end of the large arm 14 and one end of the small arm 18, a first oil cylinder 13 is arranged between the upper frame of the pile driver body 12 and the large arm 14, a second oil cylinder 15 is arranged between the large arm 14 and the middle arm 16, a third oil cylinder 17 is arranged between the middle arm 16 and the small arm 18, the other end of the small arm 18 is provided with the impact type pile driving mechanism, and the small arm 18 is connected with the support frame 2.

In the embodiment, when the pile is driven and pressed down, the clamping hammer 8 and the pile 11 enable the lower ends of the sliding grooves of the clamping hammer 8 and the guide plate 703 to act on the guide blocks 702 at two ends of the hydraulic cylinder 5 under the side body resistance and the end face resistance of the pile, and are arranged at the upper end of the second sliding groove 902 of the hanger 9 through the hydraulic cylinder 5, the shock absorber 6 and the guide plate 703; valve 3 provides high-pressure hydraulic pressure fluid to the both ends of pneumatic cylinder 5 and switches, realize stretching out of pneumatic cylinder 5 piston rod, the action of retracting, and then strike centre gripping tup 8 and stake 11, form the vibration and strike, centre gripping tup 8 and stake 11 make the spout of deflector 703 move down along pneumatic cylinder 5 both ends guide block 702 under the impact force effect, the top of tup body 805 is strikeed to the piston rod of pneumatic cylinder 5, and when pneumatic cylinder 5 both ends fluid switches, the piston rod upward movement, but the range of upward movement is less than the top of last supporting box 801 on pneumatic cylinder 5 and the centre gripping tup 8, it does not form impact contact with last supporting box 801 of centre gripping tup 8. Meanwhile, the whole machine working device applies certain pressure to the pile 11 through the support frame 2, the hanging bracket 9, the fixing plate 4, the shock absorber 6, the guide mechanism 7 and the clamping hammer 8, so that piling is realized.

Meanwhile, the guide plate 703 and the shock absorber 6 enable the fixing plate 4 to be arranged at the upper limit position in the second chute 902 on the hanging bracket 9, the hanging bracket 9 is matched with the second limit block 401 on the fixing plate 4 through the limit groove 901, and then the swinging of the fixing plate 4 and the hanging bracket 9 is limited, so that the fixing plate 4 can only slide along the second chute 902 on the hanging bracket 9 and can not swing, and therefore the support frame 2, the hanging bracket 9, the fixing plate 4, the guide plate 703, the clamping hammer 8 and the pile 11 can only vertically move in the vertical direction in the piling process, and the verticality in the piling process is guaranteed; and the interaction between the projection 402 on the fixed plate 4 and the hanger 9 can also function as an auxiliary swing limiting function.

When the pile is pulled up, the clamping hammer 8 and the pile 11 are placed on the sliding groove of the guide plate 703 under the resistance of the pile side body for limiting, and meanwhile, the hydraulic cylinder 5, the shock absorber 6 and the fixing plate 4 are placed at the lower limiting end of the second sliding groove 902 of the hanging bracket 9 through the guide blocks 702 at the two ends of the hydraulic cylinder 5; valve 3 provides high-pressure hydraulic pressure fluid to the both ends of pneumatic cylinder 5 and switches, realize stretching out of pneumatic cylinder 5 piston rod, the withdrawal action, and then strike centre gripping tup 8 and stake 11 and form the vibration and strike, strike the in-process because of pneumatic cylinder 5 both ends guide block 702 is spacing on the spout of deflector 703, the upper end of last supporting box 801 of centre gripping tup 8 is strikeed to the piston rod of pneumatic cylinder 5, and when pneumatic cylinder 5 both ends fluid switches, the piston rod downstream, but the range of downstream is less than pneumatic cylinder 5 and the distance of last supporting box 801, make centre gripping tup 8 not form the impact contact. Meanwhile, the whole machine working device applies a certain drawing force to the pile 11 through the support frame 2, the hanging bracket 9, the fixing plate 4, the shock absorber 6, the guide plate 703 and the clamping hammer 8, so that pile drawing is realized.

According to the invention, the frequency of oil supply switching from the valve 3 to the two ends of the hydraulic cylinder 5 is changed, so that the frequency of the extending and retracting actions of the piston rod of the hydraulic cylinder 5 can be controlled, and the change of the vibration frequency of the impact clamping hammer 8 and the pile 11 is realized; the oil supply pressure of the supply valve 3 and the hydraulic cylinder 5 is controlled to further control the acting oil pressure of the hydraulic cylinder 5, so that the output force of the hydraulic cylinder 5 is changed, and the impact clamping hammer 8 and the pile vibration force are further changed

Example three: as shown in fig. 6 to 8, the guide mechanism 7 includes a fixed box 705 and a mounting plate 704, the upper side of the fixed box 705 is connected to the mounting plate 704, the lower side of the fixed box 705 is movably connected to the clamping hammer 8 through a guide chute 706, the hydraulic cylinder 5 is disposed in the fixed box 705, and the cylinder body of the hydraulic cylinder 5 is connected to the mounting plate 704; the clamping hammer 8 comprises a hammer body 805 and a clamping plate 806 which are fixedly connected, a gap exists between the hammer body 805 and the clamping plate 806, a first limiting block 809 is arranged on the hammer body 805 and is used for blocking an impact groove 808 after the impact block 51 is assembled, on one hand, foreign matters can be prevented from entering the impact groove, on the other hand, even if the impact block 51 is damaged, the impact block 51 can be prevented from falling off the impact groove 808, a clamping hydraulic cylinder 803 is arranged between the hammer body 805 and the clamping plate 806, pressing plates 804 are respectively arranged on the hammer body 805 and the clamping plate 806, a guide sliding block 807 matched with the guide sliding groove 706 is arranged on the hammer body 805, the impact groove 808 is arranged on the hammer body 805, the impact block 51 matched with the impact groove 808 is arranged at the piston rod end of the hydraulic cylinder 5, and the clamping hammer 8 can only move up and down in the guide; the rest is the same as the first embodiment.

Example four: the guide mechanism 7 is connected with the fixed plate 4 through the shock absorber 6 and a fastener, and the mounting plate 704 is fixedly connected with the fixed plate 4 through the shock absorber 6 and a bolt during mounting; the other steps are the same as those of the embodiment.

The pile driver comprises a pile driver body 12, a large arm 14, a middle arm 16 and a small arm 18, wherein the pile driver body 12 is hinged to the large arm 14, two ends of the middle arm 16 are respectively hinged to one end of the large arm 14 and one end of the small arm 18, and the other end of the small arm 18 is provided with the impact type pile driving mechanism in the fourth embodiment.

As shown in fig. 7, in this embodiment, when driving, the clamping hammer 8 and the pile 11 make the clamping hammer 8 be limited at the upper limit of the guide chute 706 of the fixed box 705 under the side resistance and the end resistance of the pile, and the fixed box 705 is positioned at the upper limit in the second chute 902 of the hanger 9 through the mounting plate 704, the shock absorber 6 and the fixed plate 4; the valve 3 provides high-pressure hydraulic oil liquid for switching to two ends of the hydraulic cylinder 5, so that the extending and retracting actions of a piston rod of the hydraulic cylinder 5 are realized, the impact block 51 is driven to impact the lower end face of the impact groove 808 in the clamping hammer 8, vibration impact is formed on the clamping hammer 8 and the pile 11, and the clamping hammer 8 and the pile 11 move downwards along the guide sliding grooves 706 at two ends of the fixed box 705 under the action of impact force; when oil at two ends of the hydraulic cylinder 5 is switched, the piston rod moves upwards, but the distance between the hydraulic cylinder 5 and the upper surface of the guide chute 706 on the clamping hammer 8 is smaller than the distance between the hydraulic cylinder 5 and the upper surface of the guide chute 706 on the clamping hammer 8, and impact contact is not formed between the hydraulic cylinder 5 and the upper surface of the guide chute 706 on the clamping hammer 8. Meanwhile, the whole machine working device applies certain pressure to the pile 11 through the support frame 2, the hanging bracket 9, the fixing plate 4, the shock absorber 6, the mounting plate 704, the fixing box 705 and the clamping hammer 8, so that piling is realized.

When the pile is pulled out and lifted, the principle is the same as that of pile driving, the clamping hammer 8 and the pile 11 enable the clamping hammer 8 to be limited at the lower part of the guide sliding groove 706 of the fixed box 705 under the resistance of the pile side body, meanwhile, the fixed plate 4 is arranged at the lower limit in the sliding groove II 902 on the hanging bracket 9, the valve 3 provides high-pressure hydraulic oil liquid for switching to the two ends of the hydraulic cylinder 5, the extending and retracting actions of the piston rod of the hydraulic cylinder 5 are realized, the impact block 51 is driven to impact the upper end surface of the impact groove 808 in the clamping hammer 8, vibration impact is formed on the clamping hammer 8 and the pile 11, and the clamping hammer 8 and the pile 11 move upwards along the guide sliding grooves 706 at; when oil at two ends of the hydraulic cylinder 5 is switched, the piston rod moves downwards but the impact block 51 does not contact the lower end face of the impact groove 808. Meanwhile, the whole machine working device exerts certain pulling force on the pile 11 through the supporting frame 2, the hanging bracket 9, the fixing plate 4, the shock absorber 6, the mounting plate 704, the fixing box 705 and the clamping hammer 8, so that pile pulling is realized.

Claims

1. An impact pile driving mechanism, its characterized in that: including guiding mechanism (7), pneumatic cylinder (5) and centre gripping tup (8), guiding mechanism (7) below is equipped with can follow clamping tup (8) that guiding mechanism (7) reciprocated, installs between guiding mechanism (7) and clamping tup (8) pneumatic cylinder (5), and pneumatic cylinder (5) are connected with guiding mechanism (7), and the tailpiece of the piston rod of pneumatic cylinder (5) corresponds with clamping tup (8).

2. The impact piling mechanism of claim 1, wherein: the guide mechanism (7) comprises a guide plate (703), a sliding plate (701) capable of sliding up and down is arranged on the guide plate (703), guide blocks (702) are arranged at two ends of the sliding plate (701), a sliding groove matched with the guide blocks (702) is arranged on the guide plate (703), and a cylinder body of the hydraulic cylinder (5) is fixedly connected with the sliding plate (701).

3. The impact piling mechanism of claim 2, wherein: the clamping hammer head (8) comprises an upper supporting box (801) and a hammer head body (805) which are fixedly connected, the upper supporting box (801) is fixedly connected with a guide plate (703), the hammer head body (805) is fixedly connected with a clamping plate (806), pressing plates (804) are respectively arranged on the hammer head body (805) and the clamping plate (806), a clamping hydraulic cylinder (803) is arranged between the hammer head body (805) and the clamping plate (806), an expansion rod of the clamping hydraulic cylinder (803) is connected with the pressing plates (804) on the side of the clamping plate (806), and the other end of the clamping hydraulic cylinder (803) is hinged to the clamping plate (806).

4. The impact piling mechanism of claim 1, wherein: the guide mechanism (7) comprises a fixed box (705) and a mounting plate (704), the upper portion of the fixed box (705) is connected with the mounting plate (704), the lower portion of the fixed box (705) is movably connected with the clamping hammer head (8) through a guide sliding groove (706), the hydraulic cylinder (5) is arranged in the fixed box (705), and the cylinder body of the hydraulic cylinder (5) is connected with the mounting plate (704).

5. The impact piling mechanism of claim 4, wherein: the clamping hammer head (8) comprises a hammer head body (805) and a clamping plate (806) which are fixedly connected, wherein a pressing plate (804) is arranged on the hammer head body (805) and the clamping plate (806) respectively, a clamping hydraulic cylinder (803) is arranged between the hammer head body (805) and the clamping plate (806), an expansion rod of the clamping hydraulic cylinder (803) is connected with the pressing plate (804) on the side of the clamping plate (806), the other end of the clamping hydraulic cylinder (803) is hinged to the clamping plate (806), a guide sliding block (807) matched with a guide sliding groove (706) is arranged on the hammer head body (805), an impact groove (808) is arranged on the hammer head body (805), and an impact block (51) matched with the impact groove (808) is arranged at the end of a piston rod of a.

6. The impact piling mechanism of any one of claims 1 to 5, wherein: the lifting device is characterized by further comprising a lifting frame (9) and a fixing plate (4), wherein the guide mechanism (7) is connected with the fixing plate (4) through a shock absorber (6) and a fastener, a pin shaft (403) and a second limiting block (401) are arranged on two sides of the fixing plate (4) respectively, a second sliding groove (902) matched with the pin shaft (403) is arranged on two sides of the lifting frame (9), and a limiting groove (901) matched with the second limiting block (401) is arranged on the inner side of the lifting frame (9).

7. The impact piling mechanism of claim 6, wherein: rotatable support frame (2) are equipped with to gallows (9) top, install driving motor (1) on support frame (2), and the output shaft of driving motor (1) is equipped with gear (101), is equipped with fixed connection's gyration ring gear (904) on gallows (9), and gear (101) mesh with gyration ring gear (904) mutually.

8. The impact piling mechanism of claim 7, wherein: a rotary joint (10) is arranged between the support frame (2) and the hanging bracket (9), one end of the rotary joint (10) is connected with the support frame (2), the other end of the rotary joint is connected with the hanging bracket (9), a valve (3) is arranged on the hanging bracket (9), and the valve (3) is respectively connected with the rotary joint (10) and the hydraulic cylinder (10).

9. The utility model provides a pile driver, includes pile driver body (12), big arm (14), well arm (16) and forearm (18), pile driver body (12) upper bracket is articulated with big arm (14), and well arm (16) both ends are articulated with big arm (14) and forearm (18) one end respectively, its characterized in that: the other end of the small arm (18) is provided with an impact piling mechanism according to claim 8.

10. Pile driver according to claim 9, characterized in that: the small arm (18) is connected with the support frame (2), a first oil cylinder (13) is arranged between the upper frame and the large arm (14) of the pile driver body (12), a second oil cylinder (15) is arranged between the large arm (14) and the middle arm (16), and a third oil cylinder (17) is arranged between the middle arm (16) and the small arm (18).