CN212200421U - Hydraulic pile hammer - Google Patents

Abstract

The utility model discloses a hydraulic pile hammer, which belongs to the technical field of pile hammers, and adopts the technical scheme that a containing cavity is arranged on the top surface of a hammer core, a cover plate for sealing and covering the opening of the top surface of the hammer shell is fixedly connected to the hammer shell, a first driving assembly is arranged in the containing cavity, the first driving assembly is fixedly connected to the hammer core, a second driving assembly is arranged in the hammer shell, the second driving assembly is fixedly connected to the cover plate, and an oil cavity with variable space size is formed between the first driving assembly and the second driving assembly; the utility model discloses have and can reduce the energy resource consumption who moves in-process loop wheel machine to hydraulic pile hammer, reduce the effect of pile cost.

Description

Hydraulic pile hammer

Technical Field

The utility model relates to a technical field of pile hammer, in particular to hydraulic pile hammer.

Background

The hydraulic pile hammer is a piling machine which uses the power, self weight and pile weight of an excavator to drive a pile into the ground. Compared with the traditional pile hammer, the pile hammer has the advantages of low noise, no pollution, low vibration and the like, meets the requirement of environmental protection, and has excellent dynamic characteristics and controllability. The hydraulic pile hammer mainly has a conventional type, a high-frequency type and a resonance-free type (the resonance-free type is also the high-frequency type generally), and different types of pile hammers are suitable for different geological environments: the conventional hydraulic pile hammer has large amplitude and is suitable for construction in clay soil, the high-frequency pile hammer is suitable for sandy soil, and the resonance-free pile hammer is suitable for areas with strict limitation on vibration.

Referring to fig. 1, a conventional hydraulic pile driving hammer includes a pushing device 1, a hammer case 2, and a hammer core 3. Wherein, thrust unit 1 includes installation piece 11, and installation piece 11 is cylindric setting, and installation cavity 4 is seted up to the bottom surface of installation piece 11, and installation cavity 4 is cylindric setting and sets up along the length direction of installation piece 11. The inner wall of the installation cavity 4 is provided with a sliding cavity 5, the inner cavity of the sliding cavity 5 is in cylindrical arrangement, the cross section of the sliding cavity 5 is larger than that of the installation cavity 4, and the sliding cavity 5 is collinear with the central axis of the installation cavity 4. Sliding connection has carriage release lever 6 in the installation cavity 4, and carriage release lever 6 includes slide bar 61 and sliding block 62, and sliding block 62 is cylindric setting, and sliding block 62 is the axis collineation with slide bar 61. The sliding block 62 is connected in the sliding cavity 5 in a sliding mode, and an oil cavity is formed among the sliding block 62, the sliding rod 61 and the sliding cavity 5;

the mounting block 11 is provided with a first oil groove 7 and a second oil groove 8 which are communicated with the oil cavity 21, the first oil groove 7 is fixedly connected with a first oil delivery pipe, and the second oil groove 8 is fixedly connected with a second oil delivery pipe. The orifices of the first oil delivery pipe and the second oil delivery pipe are communicated with the oil cavity 21. Fixedly connected with oil storage tank 9 on the lateral wall of installation piece 11, fixedly connected with oil-well pump one 10, oil-well pump two 12 on the oil storage tank 9, oil-well pump one 10 and first defeated oil pipe fixed connection, oil-well pump two 12 and second defeated oil pipe fixed connection. The first oil pump can pump oil in the first oil storage tank 9 into the oil cavity, and the second oil pump can pump oil in the oil cavity 21 into the oil storage tank 9;

the hammer shell 2 is arranged in a cylindrical shape, the hammer core 3 is arranged in a cylindrical shape, and the hammer core 3 slides in the inner cavity of the hammer shell 2. The bottom fixed connection of piston rod is in hammer core 3, and the bottom terminal surface fixed connection of installation piece 11 is in hammer shell 2, and hammer core 3 sliding connection is in hammer shell 2. The piston rod can be driven to move along with the change of the oil quantity in the oil cavity, so that the effect of moving the hammer core 3 is achieved;

in the process of piling, the whole hydraulic pile driving hammer is lifted by a crane, then is vertically placed at a position needing to be beaten, and then the pushing device 1 is used for driving the hammer core 3 to move up and down, so that the hammer core 3 continuously beats in the area needing to be beaten.

Because the length of thrust unit and hammer core is all longer and weight is heavier, therefore the loop wheel machine is when transferring hydraulic pile hammer, and the height of lifting by crane of loop wheel machine will be very high, just so can increase the power consumption of the in-process loop wheel machine that lifts by crane hydraulic pile hammer, increases the pile cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hydraulic pile hammer has and can reduce the energy resource consumption of transferring the in-process loop wheel machine to hydraulic pile hammer, reduces the effect of pile cost.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a hydraulic pile hammer comprises a hammer shell and a hammer core, wherein an accommodating cavity is formed in the top surface of the hammer core, a cover plate used for sealing and covering an opening in the top surface of the hammer shell is fixedly connected to the hammer shell, a first driving assembly is arranged in the accommodating cavity and fixedly connected to the hammer core, a second driving assembly capable of moving relative to the first driving assembly is arranged in the hammer shell, the second driving assembly is fixedly connected to the cover plate, a sealed oil cavity with a variable space is formed between the first driving assembly and the second driving assembly, a first oil through hole and a second oil through hole which are communicated with the oil cavity are formed in the second driving assembly, the first oil through hole and the second oil through hole are fixedly connected with a first oil through pipe and a second oil through pipe respectively, an oil storage barrel is fixedly connected to the outer side wall of the hammer shell, and a third oil well pump and a fourth oil well pump are fixedly connected to the oil storage barrel, the third oil well pump and the fourth oil well pump are both in through connection with the oil storage barrel through a pipeline, an oil outlet of the third oil well pump is fixedly connected with the first oil through pipe, and an oil outlet of the fourth oil well pump is fixedly connected with the second oil through pipe.

By adopting the technical scheme, the oil in the oil storage barrel can be continuously pumped into the oil cavity through the third oil well pump, the first driving component is fixed with the hammer shell, the hammer shell is in a fixed state in the piling process, so the oil in the oil cavity can push the second driving component along with the continuous increase of the oil in the oil cavity, the second driving component is fixedly connected with the hammer core, the movement of the second driving component can drive the hammer core to move, when the hammer core moves to a certain height, the oil in the oil cavity can be pumped back to the oil storage barrel through the fourth oil well pump, along with the reduction of the oil in the oil cavity, the hammer core moves downwards under the action of gravity, repeated beating of the hammer core can be realized through repeated operation, compared with the mode that the pushing device is directly and fixedly connected above the hammer shell and the hammer core, the length of the whole piling hammer can be greatly shortened, and the hoisting height of the crane is reduced at the moment, thereby can reduce the energy resource consumption of loop wheel machine in the transfer in-process to hydraulic pile hammer, reduce the effect of pile cost.

The present invention may be further configured in a preferred embodiment as: first drive assembly includes fixed connection in the fixed plate that holds on the chamber, the fixed plate closing cap is in the accent that holds the chamber, the through-hole has been seted up at the center of fixed plate, and is corresponding the second subassembly includes piston rod one of fixed connection on the apron, piston rod one includes connecting rod and connecting block, the connecting rod sets up along the degree of depth direction that holds the chamber, apron one end terminal surface is kept away from to connecting block fixed connection in the connecting rod, the cross section of connecting block is greater than the cross section of connecting rod, the perpendicular tangent plane of connecting block is the setting of inversion T type, the connecting block slides with the interior chamber wall laminating that holds the chamber, fixed plate, piston rod one, hold and form between the inner wall in chamber the oil pocket, it is one to lead to oilhole and lead.

Through adopting above-mentioned technical scheme, at the in-process that removes the hammer core, can be with the oil in the oil storage bucket constantly squeeze into the oil pocket through the third oil-well pump, oil along with in the oil pocket constantly increases this moment, oil in the oil pocket can promote the fixed plate, the kickboard moves the hammer core rebound, when the hammer core rises to a take the altitude, utilize the fourth oil-well pump to extract the oil in the oil pocket, oil mass along with in the oil pocket constantly reduces, the hammer core constantly descends under the effect of its own gravity, can beat in specific place from this.

The present invention may be further configured in a preferred embodiment as: the inner wall of the accommodating cavity is fixedly connected with a first guide block along the depth direction of the inner wall, and a first guide groove used for sliding the first guide block is formed in the side wall of the connecting block.

Through adopting above-mentioned technical scheme, the cooperation slip of guide block one and guide way one is favorable to making the hammer core keep steady at the hammer core in the in-process that removes, reduces the range of rocking of pituitary.

The present invention may be further configured in a preferred embodiment as: the annular has been seted up on the lateral wall of fixed plate orientation hammer core, the inner wall that holds the chamber is contradicted with the top surface of hammer core and the inner wall laminating of annular.

Through adopting above-mentioned technical scheme, the annular sets up can so that the fixed plate is inseparabler to the shutoff that holds the chamber mouth, reduces the clearance between fixed plate and the hammer core.

The present invention may be further configured in a preferred embodiment as: fixedly connected with sealed pad one on the lateral wall of connecting block, sealed pad one and the inner wall laminating of holding the chamber slide.

Through adopting above-mentioned technical scheme, sealed setting up of filling up one can make the connecting block with hold and laminate inseparabler between the chamber, improve the leakproofness of oil pocket.

The present invention may be further configured in a preferred embodiment as: the first driving assembly comprises a second piston rod fixedly connected in the accommodating cavity, the second piston rod comprises a driving rod and a fixed block, the driving rod is arranged along the depth direction of the accommodating cavity, the bottom surface of the driving rod is fixedly connected with the side wall of the accommodating cavity facing to the cavity opening of the accommodating cavity, the fixed block is fixedly connected with the end surface of one end of the piston rod close to the cover plate, the cross section of the fixed block is larger than that of the driving rod, the vertical section of the second piston rod is arranged in a T shape, the second driving assembly correspondingly comprises an installation cylinder, the installation cylinder is arranged along the depth direction of the accommodating cavity, the end surface of one end of the installation cylinder is fixedly connected with the bottom surface of the cover plate, the outer side wall of the installation cylinder is attached to and slides with the inner cavity surface of the accommodating cavity, a baffle is fixedly connected to the bottom surface of the installation cylinder, the baffle is, the fixed block is attached to and slides on the inner cylinder wall of the mounting cylinder, the oil cavity is formed between the second piston rod and the inner wall of the accommodating cavity, and the first oil through hole and the second oil through hole are formed in the inner wall of the mounting cylinder.

Through adopting above-mentioned technical scheme, at the in-process that removes the hammer core, can constantly squeeze into the oil pocket with the oil in the oil storage bucket through the third oil-well pump, oil along with the oil in the oil pocket constantly increases this moment, and oil in the oil pocket can push the fixed block to make the high rising of place of hammer core.

The present invention may be further configured in a preferred embodiment as: and the side wall of the fixed block is fixedly connected with a second elastic pad, and the second elastic pad is attached to and slides on the inner wall of the mounting cylinder.

Through adopting above-mentioned technical scheme, when the hammer core rises to a take the altitude, utilize the fourth oil-well pump to extract the oil in the oil pocket, along with the oil mass in the oil pocket constantly reduces, the hammer core constantly descends under its own gravity's effect, can beat in specific place from this.

The present invention may be further configured in a preferred embodiment as: and a second guide block is fixedly connected to the inner wall of the sliding groove, and a second guide groove used for sliding the second guide block is formed in the side wall of the driving rod.

Through adopting above-mentioned technical scheme, the sliding fit of guide block two and guide way two is favorable to making the hammer core more steady at gliding in-process, reduces the range that the hammer core rocked, is favorable to the normal pile of pile hammer.

To sum up, the utility model discloses a following at least one useful technological effect: through the setting of first drive assembly, second drive assembly, can play the length that shortens whole pile hammer, reduce the height of lifting by crane, reduce the energy resource consumption of transferring the in-process crane to hydraulic pile hammer, reduce the effect of pile cost.

Drawings

FIG. 1 is a diagrammatic cross-sectional view of a pile driving hammer of the background art;

fig. 2 is a schematic sectional view of the pile driving hammer of embodiment 1, which is used for embodying the connection relationship between the first driving assembly and the second driving assembly;

FIG. 3 is a schematic view of an enlarged view at A in FIG. 2;

FIG. 4 is a schematic diagram of a cross-sectional view of a first guide block and a first guide slot;

FIG. 5 is a schematic cross-sectional view of the pile driving hammer used in embodiment 2 to show the connection relationship between the first drive assembly and the second drive assembly;

fig. 6 is a schematic cross-sectional view of the second guide block and the second guide groove.

In the figure, 1, a pushing device; 11. mounting blocks; 2. a hammer housing; 3. a hammer core; 4. installing a cavity; 5. a sliding cavity; 6. a travel bar; 61. a slide bar; 62. a slider; 7. a first oil groove; 8. a second oil groove; 9. an oil storage tank; 10. a first oil well pump; 12. a second oil well pump; 13. an accommodating chamber; 14. a cover plate; 15. a through groove; 16. an oil storage barrel; 17. a third oil well pump; 18. a fourth oil well pump; 19. a first drive assembly; 191. a fixing plate; 192. a piston rod II; 1921. a drive rod; 1922. a fixed block; 20. a second drive assembly; 201. a first piston rod; 2011. a connecting rod; 2012. connecting blocks; 202. mounting the cylinder; 21. an oil chamber; 22. a through hole; 23. a ring groove; 24. a first guide block; 25. a first guide groove; 26. a first sealing gasket; 27. a first oil through hole; 28. a second oil through hole; 29. a first oil pipe is communicated; 30. a second oil pipe is communicated; 31. a baffle plate; 32. a sliding groove; 33. a second elastic pad; 34. a second guide block; 35. and a second guide groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

a hydraulic pile hammer, see fig. 2 and 3, comprises a hammer shell 2 and a hammer core 3. Wherein, seted up on the top surface of hammer core 3 and held chamber 13, the inner chamber that holds chamber 13 is cylindricly setting and sets up along the length direction of hammer core 3, and the opening that holds chamber 13 is located the center of hammer core 3 top surface.

Referring to fig. 2 and 3, a cover plate 14 for covering the opening on the top surface of the hammer case 2 is fixedly connected to the top surface of the hammer case 2, and the cover plate 14 is arranged in a circular shape. The center of the cover plate 14 is provided with a through groove 15 penetrating through the upper and lower plate surfaces of the cover plate 14, and the inner cavity of the through groove 15 is arranged in a cylindrical shape.

Referring to fig. 2 and 3, an oil storage barrel 16 is fixedly connected to an outer side wall of the hammer case 2, and oil is stored in the oil storage barrel 16. The oil storage barrel 16 is fixedly connected with a third oil well pump 17 and a fourth oil well pump 18, and the third oil well pump 17 and the fourth oil well pump 18 are communicated with the oil storage barrel 16 through pipelines.

Referring to fig. 2 and 3, a first driving assembly 19 and a second driving assembly 20 which can move relative to the first driving assembly 19 are disposed in the accommodating cavity 13, and an inner cavity of the annular oil cavity 21 with a variable space size can be formed among the first driving assembly 19, the second driving assembly 20 and the accommodating cavity 13.

The first driving assembly 19 includes a fixing plate 191 fixedly connected to the accommodating cavity 13, the fixing plate 191 is disposed in a circular shape, and the fixing plate 191 covers the opening of the accommodating cavity 13. A through hole 22 penetrating the upper and lower plate surfaces of the fixing plate 191 is formed in the center of the fixing plate 191, and the inner cavity of the through hole 22 is cylindrically formed.

Referring to fig. 2 and 3, a ring groove 23 is formed in a surface of the fixing plate 191 facing the hammer core 3, and the ring groove 23 is connected to a side wall of the fixing plate 191. When the fixing plate 191 covers the top opening of the hammer case 2, the inner wall of the accommodating cavity 13 abuts against the top side wall of the hammer core 3.

Referring to fig. 2 and 3, correspondingly, the second assembly includes a first piston rod 201 fixedly connected to the cover plate 14. Wherein, piston rod 201 includes connecting rod 2011 and connecting block 2012, and connecting rod 2011 is cylindricly setting and sets up along the depth direction who holds chamber 13, and the top of connecting rod 2011 is pegged graft in leading to groove 15 and fixed connection in apron 14.

Referring to fig. 2 and 3, the connecting block 2012 is disposed in a cylindrical shape and fixedly connected to an end surface of the piston rod far away from the cover plate 14. The cross section of connecting block 2012 is greater than the cross section of connecting rod 2011, and the vertical section of connecting block 2012 is the setting of inversion T type. The connecting block 2012 slides flush against the inner chamber wall of the receiving chamber 13. The oil chamber 21 is formed among the fixing plate 191, the first piston rod 201 and the inner wall of the accommodating chamber 13.

Referring to fig. 4, a first guide block 24 is fixedly connected to the inner wall of the accommodating cavity 13 along the depth direction of the inner wall, and the first guide block 24 is rectangular. The side wall of the connecting block 2012 is provided with a first guide groove 25 for the first guide block 24 to slide.

Referring to fig. 4, a first gasket 26 is fixedly connected to a side wall of the connecting block 2012, and the first gasket 26 is attached to and slides on an inner wall of the accommodating cavity 13.

Referring to fig. 2 and 3, the second driving unit 20 is provided with a first oil hole 27 and a second oil hole 28 penetrating the oil chamber 21. The first oil through hole 27 and the second oil through hole 28 are formed in the connecting rod 2011, and inner cavities of the first oil through hole 27 and the second oil through hole 28 are formed in the length direction of the connecting rod 2011. The first oil through hole 27 and the second oil through hole 28 are fixedly connected with a first oil through pipe 29 and a second oil through pipe 30 respectively, and the end parts of the first oil through pipe 29 and the second oil through pipe 30 are fixedly connected with the third oil-well pump 17 and the fourth oil-well pump 18 respectively.

The specific implementation process comprises the following steps: in the process of moving the hammer core 3, the oil in the oil storage barrel 16 can be continuously pumped into the oil cavity 21 through the third oil-well pump 17, because the connecting rod 2011 is fixedly connected with the cover plate 14, the connecting rod 2011 and the connecting block 2012 are always kept in an immovable state, at this time, along with the oil in the oil cavity 21 is continuously increased, the oil in the oil cavity 21 can push the fixing plate 191, the fixing plate 191 drives the hammer core 3 to move upwards, when the hammer core 3 rises to a certain height, the oil in the oil cavity 21 is extracted by using the fourth oil-well pump 18, along with the continuous reduction of the oil amount in the oil cavity 21, the hammer core 3 is continuously lowered under the action of the self gravity of the hammer core 3, and therefore the hammer can be used in a specific place.

Example 2:

a hydraulic pile driving hammer, referring to fig. 5, differs from embodiment 1 in that the first drive assembly 19 includes a second piston rod 192 fixedly connected in the accommodating chamber 13, and the second piston rod 192 includes a drive rod 1921 and a fixed block 1922.

Referring to fig. 5, the driving rod 1921 is disposed in a cylindrical shape and along the depth direction of the accommodating cavity 13, and the bottom surface of the driving rod 1921 is fixedly connected to the side wall of the accommodating cavity 13 facing the cavity opening.

Referring to fig. 5, the fixing block 1922 is disposed in a cylindrical shape and fixedly connected to an end surface of the piston rod near the cover plate 14, a cross section of the fixing block 1922 is larger than a cross section of the driving rod 1921, and a vertical section of the entire second piston rod 192 is disposed in a T shape.

Referring to fig. 5, the corresponding second driving assembly 20 includes a mounting tube 202, the mounting tube 202 is disposed along the depth direction of the accommodating cavity 13, and the top end surface of the mounting tube 202 is fixedly connected to the bottom surface of the cover plate 14. The outer side wall of the mounting cylinder 202 slides in fit with the inner cavity surface of the accommodating cavity 13.

Referring to fig. 5, a baffle 31 is fixedly connected to the bottom surface of the mounting cylinder 202, and the baffle 31 is disposed in a circular shape and covers the bottom cavity of the mounting cylinder 202. The center of the baffle 31 is provided with a sliding groove 32, the inner cavity of the sliding groove 32 is arranged in a cylindrical shape, and the driving rod 1921 is inserted into the sliding groove 32.

Referring to fig. 5, the fixing block 1922 slides in contact with the inner wall of the mounting cylinder 202, and an oil chamber 21 is formed between the fixing block 1922, the driving rod 1921 and the inner wall of the accommodating chamber 13.

Referring to fig. 6, a second guide block 34 is fixedly connected to an inner wall of the sliding groove 32, and a second guide groove 35 for sliding the second guide block 34 is formed in a side wall of the driving rod 1921.

Referring to fig. 6, the second elastic pad 33 is fixedly connected to the side wall of the fixing block 1922, and the second elastic pad 33 is attached to and slides on the inner wall of the mounting cylinder 202.

Referring to fig. 5, the first oil through hole 27 and the second oil through hole 28 are opened on the inner wall of the mounting cylinder 202, and the first oil through hole 27 and the second oil through hole 28 are connected with the inner cavity of the accommodating cavity 13 in a penetrating manner.

The specific implementation process comprises the following steps: in the process of moving the hammer core 3, the oil in the oil storage barrel 16 can be continuously pumped into the oil chamber 21 through the third oil-well pump 17, because the baffle plate 31 is fixed with the mounting cylinder 202, the mounting cylinder 202 is fixed with the cover plate 14 and always keeps a stationary state, at this time, as the oil in the oil chamber 21 is continuously increased, the oil in the oil chamber 21 can extrude and push the fixed block 1922, and therefore the height of the hammer core 3 is increased.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (8)

1. The utility model provides a hydraulic pile hammer, includes hammer shell (2), hammer core (3), its characterized in that: seted up on the top surface of hammer core (3) and held chamber (13), fixedly connected with is used for closing cap hammer shell (2) top surface open-ended apron (14) on hammer shell (2), it is provided with first drive assembly (19) in chamber (13) to hold, first drive assembly (19) fixed connection is in hammer core (3), be provided with in hammer shell (2) with first drive assembly (19) relatively movable's second drive assembly (20), second drive assembly (20) fixed connection is in apron (14), form changeable airtight oil pocket (21) of space size between first drive assembly (19) and second drive assembly (20), set up on second drive assembly (20) and lead to oilhole one (27) and lead to oilhole two (28) of being connected through to oil pocket (21), lead to oilhole one (27), lead to oilhole two (28) in fixedly connected with oil pipe one (29) respectively, Lead to oil pipe two (30), fixedly connected with oil storage bucket (16) on the lateral wall of hammer shell (2), fixedly connected with third oil-well pump (17) and fourth oil-well pump (18) on oil storage bucket (16), third oil-well pump (17) and fourth oil-well pump (18) all through the pipeline with oil storage bucket (16) through connection, the oil-out and the oil pipe one (29) fixed connection of third oil-well pump (17), the oil-out and the oil pipe two (30) fixed connection of fourth oil-well pump (18).

2. The hydraulic pile driving hammer as set forth in claim 1, wherein: first drive assembly (19) including fixed plate (191) of fixed connection on holding chamber (13), fixed plate (191) closing cap is in the accent that holds chamber (13), through-hole (22) have been seted up at the center of fixed plate (191), and is corresponding second drive assembly (20) include piston rod one (201) of fixed connection on apron (14), piston rod one (201) include connecting rod (2011) and connecting block (2012), connecting rod (2011) set up along the degree of depth direction that holds chamber (13), connecting block (2012) fixed connection keeps away from apron (14) one end terminal surface in connecting rod (2011), the cross section of connecting block (2012) is greater than the cross section of connecting rod (2011), the perpendicular tangent plane of connecting block (2012) is the T type setting of inverteing, connecting block (2012) and the inner chamber wall laminating slip that holds chamber (13), the oil cavity (21) is formed among the fixing plate (191), the first piston rod (201) and the inner wall of the accommodating cavity (13), and the first oil through hole (27) and the second oil through hole (28) are formed in the first piston rod (201).

3. The hydraulic pile driving hammer as set forth in claim 2, wherein: the inner wall of the accommodating cavity (13) is fixedly connected with a first guide block (24) along the depth direction of the inner wall, and a first guide groove (25) used for sliding the first guide block (24) is formed in the side wall of the connecting block (2012).

4. The hydraulic pile driving hammer as set forth in claim 2, wherein: annular groove (23) have been seted up on fixed plate (191) towards the lateral wall of hammer core (3), the inner wall that holds chamber (13) and the top surface of hammer core (3) contradict with the inner wall laminating of annular groove (23).

5. The hydraulic pile driving hammer as set forth in claim 2, wherein: fixedly connected with sealed pad (26) on the lateral wall of connecting block (2012), sealed pad (26) and the inner wall laminating of holding chamber (13) slide.

6. The hydraulic pile driving hammer as set forth in claim 1, wherein: the first driving assembly (19) comprises a second piston rod (192) fixedly connected in the accommodating cavity (13), the second piston rod (192) comprises a driving rod (1921) and a fixed block (1922), the driving rod (1921) is arranged in the depth direction of the accommodating cavity (13), the bottom surface of the driving rod (1921) is fixedly connected to the side wall of the accommodating cavity (13) facing to the cavity opening of the second piston rod, the fixed block (1922) is fixedly connected to the end surface of the piston rod close to one end of the cover plate (14), the cross section of the fixed block (1922) is larger than that of the driving rod (1921), the vertical section of the second piston rod (192) is arranged in a T shape, the corresponding second driving assembly (20) comprises a mounting barrel (202), the mounting barrel (202) is arranged in the depth direction of the accommodating cavity (13), and one end surface of the mounting barrel (202) is fixedly connected to the bottom surface of the cover plate (, the outer side wall of the installation cylinder (202) and the inner cavity surface of the accommodating cavity (13) are in fit sliding, a baffle (31) is fixedly connected to the bottom surface of the installation cylinder (202), the baffle (31) is covered in the bottom cavity of the installation cylinder (202), a sliding groove (32) for driving the rod (1921) to slide is formed in the center of the baffle (31), the fixed block (1922) and the inner cylinder wall of the installation cylinder (202) are in fit sliding, the piston rod II (192) and the inner wall of the accommodating cavity (13) form the oil cavity (21), and the oil through hole I (27) and the oil through hole II (28) are arranged on the inner wall of the installation cylinder (202).

7. The hydraulic pile driving hammer as set forth in claim 6, wherein: and a second elastic pad (33) is fixedly connected to the side wall of the fixed block (1922), and the second elastic pad (33) is attached to the inner wall of the mounting cylinder (202) to slide.

8. The hydraulic pile driving hammer as set forth in claim 6, wherein: a second guide block (34) is fixedly connected to the inner wall of the sliding groove (32), and a second guide groove (35) for the second guide block (34) to slide is formed in the side wall of the driving rod (1921).

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