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CN110966297A - Anti-loosening method and device for pile hammer head - Google Patents

Anti-loosening method and device for pile hammer head Download PDF

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Publication number
CN110966297A
CN110966297A CN201911350507.9A CN201911350507A CN110966297A CN 110966297 A CN110966297 A CN 110966297A CN 201911350507 A CN201911350507 A CN 201911350507A CN 110966297 A CN110966297 A CN 110966297A
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CN
China
Prior art keywords
nut
screw
hole
head
face
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Granted
Application number
CN201911350507.9A
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Chinese (zh)
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CN110966297B (en
Inventor
魏智健
张兰
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Guangdong Liyuan Hydraulic Machinery Co ltd
Guangdong Sparta Heavy Industry Technology Co ltd
Original Assignee
GUANGDONG LIYUAN HYDRAULIC MACHINERY Co Ltd
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Priority to CN201911350507.9A priority Critical patent/CN110966297B/en
Publication of CN110966297A publication Critical patent/CN110966297A/en
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Publication of CN110966297B publication Critical patent/CN110966297B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/04—Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/02—Releasable fastening devices locking by rotation
    • F16B21/04—Releasable fastening devices locking by rotation with bayonet catch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The invention relates to a manufacturing technology of heavy pile foundation engineering equipment, and discloses a method for preventing a pile hammer head from loosening, which comprises the following steps: firstly, a pin bolt of a pin shaft penetrates through a shaft hole of an assembly body to be in threaded connection with a nut; turning the nut tightly again, turning the hexagon socket head cap screw into the second screw on the terminal surface under the nut after that, turning the end flange tightly again and installing on first screw to make the hexagon socket head cap screw align with the counter bore on the end cover, then with the reversal of hexagon socket head cap screw or corotation to stretch into down in sinking the hole, make the lower extreme of hexagon socket head cap screw and the spacing chucking in sinking the hole. The invention also discloses a device for implementing the method. Through the unique structure and process design, the nut can be effectively prevented from loosening from the pin shaft, the heavy pile driver can be widely applied to the manufacture of the heavy pile driver, and the indexes of stability, safety and the like of heavy pile foundation equipment can be obviously improved, so that the standard reaches the international advanced technical level.

Description

Anti-loosening method and device for pile hammer head
Technical Field
The invention relates to the technical field of heavy pile foundation engineering equipment manufacturing, in particular to a method and a device for preventing a pile hammer head from loosening.
Background
At present, in the construction process of a building pile foundation, a pile hammer is often required to be used for pile foundation pile sinking construction, the commonly used pile hammer comprises a hydraulic hammer, a hydraulic vibration hammer, a diesel hammer and the like, and the pile hammer belongs to a high-load dynamic vibration structure, so that the fastening of an assembly structure is particularly important, and once the fastener of the assembly structure is loosened, a large safety accident and great economic loss are caused. Especially heavy engineering equipment and large-scale ocean engineering equipment, because of the reasons such as construction environment is abominable, continuous operation time is long, higher requirements are put forward to the stability and the security of pile hammer head, and prior art is difficult to satisfy.
With the development of economic society, large-scale construction projects such as cross-sea bridges, offshore wind power, land grand bridges, super high-rise buildings and the like are more and more, and the requirements of heavy construction equipment required by the large-scale construction projects are more and more prominent. However, since the heavy construction equipment in China starts late, problems exist in many aspects, a large number of core technologies are monopolized by foreign enterprises, and the method comprises a method and a structure for preventing the hydraulic pile hammer head of the heavy pile foundation construction equipment from loosening.
In the prior art, chinese patent literature discloses an interlocking anti-loose bolt [ application number: 201220063479.X ], which consists of a screw, an inner nut and an outer nut. The screw thread of the screw rod is a forward and reverse screw thread, the internal thread of the internal nut is a forward screw thread, and the internal thread of the external nut is a reverse screw thread. The opposite top surfaces of the inner nut and the outer nut are provided with 2-12 anti-skidding grooves. The anti-slip groove is of a structure which gradually rises anticlockwise.
The scheme improves the problem that the existing bolt is easy to loosen when being connected with the nut to a certain extent, although the anti-skidding grooves are arranged on the opposite top surfaces of the inner nut and the outer nut, the thread starting points of the inner nut, the outer nut and the bolt are uncertain, and the anti-skidding grooves are difficult to achieve the purpose of being clamped together. Even if the pile hammer can be clamped together accidentally, the pile hammer is applied to a pile hammer with a high-load dynamic vibration structure, the problem that the connection strength is low, when the vibration is large, a gap is easy to appear between the inner nut and the outer nut or the inner nut is easy to push the outer nut to retreat to cause looseness between the inner nut and the connector, and finally the outer nut and the inner nut are separated from the bolt is caused. In particular, the structural design is limited in alternating load and is not suitable for preventing the hammer head of the heavy pile driver from loosening.
Therefore, it is necessary to develop a new method and device for preventing the hammer head of the pile driver from loosening and falling off, so as to prevent the hammer head of the hydraulic pile driver from loosening and falling off under the alternating load of large and long-term operation, and to ensure the stability, safety and other indexes of the heavy pile foundation equipment to reach the international advanced technical level.
Disclosure of Invention
The invention aims to solve the problems and provides a method and a device for preventing a pile hammer head from loosening, which can effectively prevent a nut from loosening from a pin shaft and realize that the fastening distance between the nut and the pin shaft can be adjusted through unique structure and process design; the device is through the spacing chucking of hexagon socket head cap screw with end flange and nut to utilize the forward and reverse screw of end flange and nut and round pin axle fastening, realize preventing that the nut from taking off from selling epaxial pine, and can be applicable to the locking pine that is applicable to heavy pile driver tup and take off.
The technical scheme is as follows:
a method for preventing a pile hammer head from loosening comprises the following steps:
(1) a pin shaft of the pile driving hammer head anti-loosening device penetrates through a shaft hole of the assembly body through a pin bolt to be in threaded connection with a nut; the anti-loosening device for the pile driving hammer head comprises an assembly body, a pin shaft, a nut, an inner hexagonal round-head screw and an end flange, wherein the pin shaft comprises a pin bolt and a pin cover, a first external thread is arranged on the outer side surface of the pin bolt, a first screw hole is formed in the lower end surface of the pin bolt, the first screw hole is provided with a first internal thread, and the direction of the first internal thread is opposite to that of the first external thread; a second screw hole is formed in the lower end face of the nut; the end flange comprises an end bolt and an end cover, and a counter bore is formed in the upper end face of the end cover; the counter bore comprises a counter bore and a first through hole, the counter bore is matched with the lower end of the inner hexagonal round head screw, and the bottom end of the counter bore is communicated with the lower end face of the end cover through the first through hole;
(2) the nut is screwed up along the first external thread of the pin bolt until the distance between the nut and the pin cover reaches a preset distance;
(3) the inner hexagonal round-head screw is twisted into the second screw hole in a forward rotation or reverse rotation manner;
(4) the end flange is screwed up along the first internal thread of the first screw hole through the end bolt, the upper end face of the end cover is abutted against the lower end face of the nut, and the hexagon socket head cap screw is aligned with the counter bore;
(5) and an inner hexagonal wrench penetrates through the first through hole to enable the inner hexagonal round-head screw to stretch downwards into the sinking pit in a reverse rotation or forward rotation mode, and the lower end of the inner hexagonal round-head screw is tightly clamped with the sinking pit in a limiting mode.
The inner hexagonal round-head screw, the second screw holes and the counter bores are respectively multiple, the second screw holes are evenly distributed on the lower end face of the nut, and the inner hexagonal round-head screw structure further comprises the following steps after the step (2):
twisting the inner hexagonal round-head screws into the second screw holes in a forward rotation manner;
the end flange is screwed up along the first internal thread of the first screw hole through the end bolt, the upper end face of the end cover is abutted against the lower end face of the nut, and the inner hexagonal round head screws are aligned with the counter bores;
and an inner hexagonal wrench penetrates through the first through holes to reversely extend the inner hexagonal round head screws into the sinking pits, and the lower ends of the inner hexagonal round head screws are limited and clamped with the sinking pits.
The hexagon socket head cap screw includes screw rod, nut, heavy hole are circular respectively, the aperture of first through-hole is less than the external diameter of nut, the length of screw rod with the degree of depth of second screw suits, the length of screw rod is greater than the three times of heavy hole degree of depth, step (5) still includes following step:
and an inner hexagonal wrench penetrates through the first through hole to enable the inner hexagonal round-head screw to stretch downwards into the sinking pit in a reverse rotation or forward rotation mode, and the lower end face of the screw cap is abutted against the bottom end face of the sinking pit.
The pile hammer head anti-loosening device adopting the anti-loosening method comprises an assembly body, a pin shaft, a nut, an inner hexagonal round head screw and an end flange, wherein the assembly body is provided with a shaft hole, the pin shaft comprises a pin bolt, the outer side surface of the pin bolt is provided with a first external thread, a first screw hole is arranged on the lower end surface of the pin bolt, the first screw hole is provided with a first internal thread, the direction of the first internal thread is opposite to that of the first external thread, the pin shaft penetrates through the shaft hole from top to bottom through the pin bolt and is in threaded connection with the nut and the end flange through the first external thread and the first internal thread respectively; the end flange comprises an end cover, a second screw hole and a counter bore are respectively formed in the lower end face of the nut and the upper end face of the end cover, the second screw hole corresponds to the position of the counter bore, the inner hexagonal round-head screw is upwards pre-twisted into the second screw hole, and the inner hexagonal round-head screw downwards extends into the counter bore and is connected with the counter bore in a limiting and clamping mode.
The hinge pin further comprises a hinge pin cover, the upper end face of the hinge pin bolt is connected with the hinge pin cover in an integrated forming mode, the hinge pin is in contact with the upper end face of the assembly body in a close mode through the lower end face of the hinge pin cover, and the upper end face of the nut is in contact with the lower end face of the assembly body in a close mode.
The nut is provided with a second internal thread, and the nut is in threaded connection with the first external thread of the pin bolt through the second internal thread in a matching mode.
The end flange further comprises an end bolt, the lower end face of the end bolt is connected with the upper end face of the end cover in an integrated forming mode, a second external thread is arranged on the outer side face of the end bolt, the end flange is connected with the first internal thread of the first screw hole in a matched threaded mode through the second external thread of the end bolt, and the upper end face of the end cover covers the lower end face of the nut.
The second screw hole is internally provided with a third internal thread, the inner hexagonal round-head screw comprises a screw rod, the screw rod is provided with a third external thread, the third external thread is matched with the third internal thread, and the inner hexagonal round-head screw passes through the screw rod to be pre-twisted into the second screw hole.
The inner hexagonal round-head screw further comprises a nut, the upper end face of the nut is connected with the lower end face of the screw rod in an integrated forming mode, the counter bore comprises a sinking hole and a first through hole, the sinking hole is matched with the nut, the bottom end of the sinking hole is communicated with the lower end face of the end cover through the first through hole, and the inner hexagonal round-head screw passes through the nut downwards extends into the sinking hole and is clamped in the sinking hole in a limiting mode.
The nut and the sinking pit are respectively circular, and the circular nut is respectively matched, limited and clamped with the circular sinking pit.
It should be noted that:
the foregoing references to "first and second …" do not denote any particular quantity or order, but rather are used to distinguish one name from another.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The following illustrates the advantages or principles of the invention:
1. the invention provides a pile hammer head anti-loose method, wherein a pile hammer comprises a hydraulic hammer, a hydraulic vibration hammer, a diesel hammer and the like, and a pin bolt of a pin shaft penetrates through a shaft hole of an assembly body to be in threaded connection with a nut; screwing the nut again to enable the distance between the nut and the pin cover to reach a preset distance, so that the fastening distance between the nut and the pin shaft can be adjusted, then screwing the inner hexagonal round-head screw into a second screw hole on the lower end face of the nut in a forward or reverse mode, then screwing an end flange on the first screw hole tightly, aligning the inner hexagonal round-head screw with a counter bore on the end cover, then extending the inner hexagonal round-head screw into the counter bore in a downward or reverse mode, and enabling the lower end of the inner hexagonal round-head screw to be tightly limited with the counter bore; the nut is limited and clamped with the end flange through the inner hexagonal round head screw, so that relative rotation between the nut and the end flange is avoided; in addition, the first internal thread on the pin shaft and the first external thread are opposite in thread direction, so that the end flange and the nut which are in threaded connection with the first internal thread and the first external thread on the pin shaft correspondingly are opposite in thread direction, the end flange and the nut are in locking connection with the pin shaft in the positive direction and the negative direction, the nut can be effectively prevented from loosening from the pin shaft, and the fastening distance between the nut and the pin shaft can be adjusted. The invention can be applied to the heavy pile driver by unique structure and process design, realizes the anti-loosening of the hammer head of the hydraulic pile driver under the action of larger alternating load for long-term operation, and can ensure the indexes of stability, safety and the like of heavy pile foundation equipment to reach the international advanced technical level.
2. Preferably, the inner hexagonal round-head screws, the second screw holes and the counter bores are respectively multiple, so that relative rotation between the nuts and the end flanges can be effectively avoided, and the fastening stability of the nuts and the end flanges is improved.
3. Preferably, the aperture of the first through hole is smaller than the outer diameter of the nut, so that the hexagon socket head cap screw can be conveniently and reversely rotated or forwardly rotated to be downwards abutted against the bottom end face of the sunk pit, the hexagon socket head cap screw and the sunk pit can be conveniently and stably limited and clamped, the length of the hexagon socket head cap screw is more than three times of the depth of the sunk pit, and the limitation and clamping of the hexagon socket head cap screw and the sunk pit are more stable.
4. The invention provides a pile hammer head loosening prevention device which comprises an assembly body, a pin shaft, a nut, an inner hexagonal round-head screw and an end flange, wherein when the pile hammer head loosening prevention device is used, a pin bolt of the pin shaft penetrates through a shaft hole of the assembly body to be in threaded connection with the nut; screwing the nut again to enable the distance between the nut and the pin cover to reach a preset distance, so that the fastening distance between the nut and the pin shaft can be adjusted, then screwing the inner hexagonal round-head screw into a second screw hole on the lower end face of the nut in a forward or reverse mode, then screwing an end flange on the first screw hole tightly, aligning the inner hexagonal round-head screw with a counter bore on the end cover, then extending the inner hexagonal round-head screw into the counter bore in a downward or reverse mode, and enabling the lower end of the inner hexagonal round-head screw to be tightly limited with the counter bore; the nut is limited and clamped with the end flange through the inner hexagonal round head screw, so that relative rotation between the nut and the end flange is avoided; in addition, the first internal thread on the pin shaft and the first external thread have opposite thread directions, so that the thread directions of the end flange and the nut which are in threaded connection corresponding to the first internal thread and the first external thread on the pin shaft are also opposite, the end flange and the nut are in locking connection with the pin shaft in the positive and negative directions, the device limits and clamps the end flange and the nut through the hexagon socket head round-head screw, and the end flange and the nut are fastened with the pin shaft by utilizing the positive and negative threads of the end flange and the nut, so that the nut is prevented from loosening from the pin shaft; but also can realize that the fastening distance of nut and round pin axle is adjustable.
5. The pin shaft of the invention is contacted with the upper end surface of the assembly body through the lower end surface of the pin cover, and the upper end surface of the nut is contacted with the lower end surface of the assembly body, thereby realizing the fastening and installation of the assembly body.
6. The nut is in threaded connection with the first external thread of the pin bolt through the second internal thread in a matching mode, and the nut is screwed tightly.
7. The end flange is in threaded connection with the first inner thread of the first screw hole through the second outer thread of the end bolt, so that the end flange is screwed tightly.
8. According to the inner hexagonal round-head screw, the third external thread of the screw rod is pre-twisted into the third internal thread of the second screw hole, so that pre-twisting operation of the inner hexagonal round-head screw is achieved, and the inner hexagonal round-head screw is convenient to install.
9. The inner hexagonal round-head screw further comprises a nut, the counter bore comprises a counter bore and a first through hole, the counter bore is matched with the nut, the counter bore is conveniently limited and clamped with the lower end of the inner hexagonal round-head screw, and a user can conveniently insert the inner hexagonal plate from the first through hole to twist the inner hexagonal round-head screw.
10. The nut and the sinking pit are respectively circular, so that the nut can conveniently extend downwards into the sinking pit.
Drawings
Fig. 1 is a first sectional view of a pile hammer head release preventing device according to an embodiment of the invention.
Fig. 2 is a second sectional view of the pile hammer head release preventing device according to the embodiment of the invention.
Fig. 3 is a third sectional view of the pile hammer head release preventing device according to the embodiment of the invention.
Fig. 4 is a fourth sectional view of the pile hammer head release preventing device according to the embodiment of the invention.
Fig. 5 is a cross-sectional view of the pile hammer head release preventing device in the embodiment of the invention.
Description of reference numerals:
10. the assembly body, 11, shaft hole, 20, pin shaft, 21, pin bolt, 22, first screw hole, 23, pin cover, 30, nut, 31, second screw hole, 40, inner hexagonal round head screw, 41, screw rod, 42, nut, 50, end flange, 51, end cover, 52, counter bore, 521, counter bore, 522, first through hole, 53 and end bolt.
Detailed Description
The following provides a detailed description of embodiments of the invention.
As shown in fig. 1 to 5, the method for preventing the pile hammer head from loosening provided by the invention comprises the following steps:
(1) as shown in fig. 1, a pin shaft 20 of the pile hammer head release preventing device is connected with a nut 30 through a pin bolt 21 passing through a shaft hole 11 of an assembly body 10; the pile hammer head loosening prevention device comprises an assembly body 10, a pin shaft 20, a nut 30, an inner hexagonal round head screw 40 and an end flange 50, wherein the pin shaft 20 comprises a pin bolt 21 and a pin cover 23, a first external thread is arranged on the outer side surface of the pin bolt 21, a first screw hole 22 is formed in the lower end surface of the pin bolt 21, the first screw hole 22 is provided with a first internal thread, and the direction of the first internal thread is opposite to that of the first external thread; the lower end surface of the nut 30 is provided with a second screw hole 31; the end flange 50 comprises an end bolt 53 and an end cover 51, and a counter bore 52 is arranged on the upper end face of the end cover 51; the counter bore 52 comprises a counter bore 521 and a first through hole 522, the counter bore 521 is matched with the lower end of the inner hexagonal round head screw 40, and the bottom end of the counter bore 521 is communicated with the lower end face of the end cover 51 through the first through hole 522;
(2) as shown in fig. 2, the nut 30 is tightened up along the first external thread of the pin bolt 21 until the distance between the nut 30 and the pin cover 23 reaches a predetermined distance;
(3) turning the hexagon socket head cap screw 40 forward or backward into the second screw hole 31 as shown in fig. 3;
(4) as shown in fig. 4, the end flange 50 is screwed up along the first internal thread of the first screw hole 22 by the end bolt 53, and the upper end surface of the end cap 51 is pressed against the lower end surface of the nut 30, and the hexagon socket head cap screw 40 is aligned with the counter bore 52;
(5) as shown in fig. 5, the hexagon socket head cap screw 40 is inserted through the first through hole 522 by a hexagon socket wrench and extends downwards into the sunken hole 521 in a reverse or forward direction, and the lower end of the hexagon socket head cap screw 40 is limited and tightly clamped with the sunken hole 521.
Firstly, a pin bolt 21 of a pin shaft 20 penetrates through a shaft hole 11 of an assembly body 10 and is in threaded connection with a nut 30; screwing the nut 30 tightly to enable the distance between the nut 30 and the pin cover 23 to reach a preset distance, so that the fastening distance between the nut 30 and the pin shaft 20 can be adjusted, screwing the inner hexagonal round-head screw 40 into a second screw hole 31 on the lower end face of the nut 30 in a forward rotation or reverse rotation mode, screwing the end flange 50 tightly on the first screw hole 22, aligning the inner hexagonal round-head screw 40 with a counter bore 52 on the end cover 51, and then extending the inner hexagonal round-head screw 40 into the counter bore 521 downwards in a reverse rotation or forward rotation mode to enable the lower end of the inner hexagonal round-head screw 40 to be limited and tightly clamped with the counter bore 521; the nut 30 is limited and clamped with the end flange 50 through the hexagon socket head round head screw 40, so that relative rotation between the nut 30 and the end flange 50 is avoided; in addition, because the first internal thread on the pin shaft 20 and the first external thread have opposite thread directions, the end flange 50 and the nut 30 which are in threaded connection with the first internal thread and the first external thread on the pin shaft 20 correspondingly have opposite thread directions, so that the end flange 50 and the nut 30 are in locking connection with the pin shaft 20 in the positive and negative directions, the method can effectively prevent the nut 30 from loosening from the pin shaft 20, and can realize that the fastening distance between the nut 30 and the pin shaft 20 is adjustable.
Preferably, the number of the hexagon socket head cap screws 40, the number of the second screw holes 31, and the number of the counter bores 52 are plural (not shown in the figure), and the second screw holes 31 are uniformly distributed on the lower end surface of the nut 30, and the following steps are further included after the step (2):
the inner hexagonal round head screws 40 are positively rotated and twisted into the second screw holes 31;
the end flange 50 is screwed up along the first internal thread of the first screw hole 22 by the end bolt 53, and the upper end face of the end cap 51 is pressed against the lower end face of the nut 30, and each hexagon socket head cap screw 40 is aligned with each counter bore 52;
and an inner hexagonal wrench penetrates through each first through hole 522 to reversely turn each inner hexagonal round-head screw 40 to extend downwards into each sinking pit 521, and the lower end of each inner hexagonal round-head screw 40 is limited and tightly clamped with each sinking pit 521.
The inner hexagonal round-head screws 40, the second screw holes 31 and the counter bores 52 are multiple, so that relative rotation between the nuts 30 and the end flanges 50 can be effectively avoided, and the fastening stability of the nuts 30 and the end flanges 50 is improved.
Preferably, the hexagon socket head cap screw 40 includes a screw 41 and a nut 42, the nut 42 and the sunken hole 521 are respectively circular, the aperture of the first through hole 522 is smaller than the outer diameter of the nut 42, the length of the screw 41 is adapted to the depth of the second screw hole 31, the length of the screw 41 is greater than three times the depth of the sunken hole 521, and the step (5) further includes the following steps:
the hexagon socket head cap screw 40 is inserted into the sinking pit 521 in a reverse rotation or forward rotation direction by a hexagon socket wrench through the first through hole 522, and the lower end face of the nut 42 is abutted against the bottom end face of the sinking pit 521.
The aperture of the first through hole 522 is smaller than the outer diameter of the nut 42, so that the hexagon socket head cap screw 40 can be conveniently and reversely rotated or forwardly rotated to be downwards abutted against the bottom end face of the sunk pit 521, the hexagon socket head cap screw 40 and the sunk pit 521 can be conveniently limited and clamped, the length of the screw rod 41 of the hexagon socket head cap screw 40 is more than three times of the depth of the sunk pit 521, and the limitation and clamping of the hexagon socket head cap screw 40 and the sunk pit 521 are more stable.
As shown in fig. 1 to 5, the device for preventing loosening of a pile hammer head provided by the invention comprises an assembly body 10, a pin shaft 20, a nut 30, an inner hexagonal round head screw 40 and an end flange 50, wherein the assembly body 10 is provided with a shaft hole 11, the pin shaft 20 comprises a pin bolt 21, the outer side surface of the pin bolt 21 is provided with a first external thread, the lower end surface of the pin bolt 21 is provided with a first screw hole 22, the first screw hole 22 is provided with a first internal thread, the direction of the first internal thread is opposite to that of the first external thread, the pin shaft 20 passes through the shaft hole 11 from top to bottom through the pin bolt 21 and is respectively in threaded connection with the nut 30 and the end flange 50 through the first external thread and the first internal thread; the end flange 50 comprises an end cover 51, a second screw hole 31 and a counter bore 52 are respectively formed in the lower end face of the nut 30 and the upper end face of the end cover 51, the second screw hole 31 corresponds to the counter bore 52 in position, the inner hexagonal round head screw 40 is upwards pre-twisted into the second screw hole 31, and the inner hexagonal round head screw 40 downwards extends into the counter bore 52 and is connected with the counter bore 52 in a limiting and clamping mode.
When in use, the pin bolt 21 of the pin shaft 20 firstly passes through the shaft hole 11 of the assembly body 10 and is in threaded connection with the nut 30; screwing the nut 30 tightly to enable the distance between the nut 30 and the pin cover 23 to reach a preset distance, so that the fastening distance between the nut 30 and the pin shaft 20 can be adjusted, screwing the inner hexagonal round-head screw 40 into a second screw hole 31 on the lower end face of the nut 30 in a forward rotation or reverse rotation mode, screwing the end flange 50 tightly on the first screw hole 22, aligning the inner hexagonal round-head screw 40 with a counter bore 52 on the end cover 51, and then extending the inner hexagonal round-head screw 40 into the counter bore 521 downwards in a reverse rotation or forward rotation mode to enable the lower end of the inner hexagonal round-head screw 40 to be limited and tightly clamped with the counter bore 521; the nut 30 is limited and clamped with the end flange 50 through the hexagon socket head round head screw 40, so that relative rotation between the nut 30 and the end flange 50 is avoided; in addition, the first internal thread on the pin shaft 20 and the first external thread have opposite thread directions, so that the thread directions of the end flange 50 and the nut 30 which are in threaded connection with the first internal thread and the first external thread on the pin shaft 20 are also opposite, so that the end flange 50 and the nut 30 are in locking connection with the pin shaft 20 in the positive and negative directions, the device limits and clamps the end flange 50 and the nut 30 through the hexagon socket head round-headed screw 40, and the end flange 50 and the nut 30 are fastened with the pin shaft 20 by using the positive and negative threads of the end flange 50 and the nut 30, so that the nut 30 is prevented from loosening from the pin shaft 20; but also the fastening distance of the nut 30 to the pin shaft 20 can be adjusted.
The pin shaft 20 further includes a pin cover 23, the upper end surface of the pin bolt 21 is integrally connected with the pin cover 23, the pin shaft 20 is in close contact with the upper end surface of the assembly body 10 through the lower end surface of the pin cover 23, and the upper end surface of the nut 30 is in close contact with the lower end surface of the assembly body 10. Thereby achieving a secure mounting of the fitting body 10.
The nut 30 has a second internal thread, by means of which the nut 30 is screwed in a mating manner with the first external thread of the pin bolt 21. Tightening of the nut 30 is achieved.
The end flange 50 further comprises end bolts 53, the lower end faces of the end bolts 53 are integrally connected with the upper end face of the end cover 51, second external threads are arranged on the outer side faces of the end bolts 53, the end flange 50 is in threaded connection with the first internal threads of the first screw hole 22 through the second external threads of the end bolts 53, and the upper end face of the end cover 51 covers the lower end face of the nut 30. Tightening of the end flange 50 is achieved.
Third internal thread has in the second screw 31, and hexagon socket head cap screw 40 includes screw rod 41, and screw rod 41 has the third external screw thread, and third external screw thread and third internal thread phase-match, hexagon socket head cap screw 40 pass through screw rod 41 and twist in advance second screw 31. The pre-twisting operation of the inner hexagonal round head screw 40 is realized, and the installation is convenient.
The inner hexagonal round-head screw 40 further comprises a nut 42, the upper end face of the nut 42 is connected with the lower end face of the screw rod 41 in an integrated forming mode, the counter bore 52 comprises a counter bore 521 and a first through hole 522, the counter bore 521 is matched with the nut 42, the bottom end of the counter bore 521 is communicated with the lower end face of the end cover 51 through the first through hole 522, and the inner hexagonal round-head screw 40 downwards extends into the counter bore 521 through the nut 42 and is limited and clamped with the counter bore 521. The counter sink 521 is matched with the nut 42, so that the limiting clamping of the lower end of the counter sink 52 and the hexagon socket head cap screw 40 is facilitated, the arrangement of the first through hole 522 is convenient for a user to insert the hexagon socket head plate from the first through hole 522 to twist the hexagon socket head cap screw 40.
Preferably, the nut 42 and the sunken hole 521 are circular respectively, and the circular nut 42 is matched with the circular sunken hole 521 for limiting and clamping connection respectively. To facilitate the downward extension of the nut 42 into the well 521.
The invention can be applied to the heavy pile driver by unique structure and process design, realizes the anti-loosening of the hammer head of the hydraulic pile driver under the action of larger alternating load for long-term operation, can obviously improve the indexes of stability, safety and the like of heavy pile foundation equipment, and can reach the international advanced technical level.
The above are merely specific embodiments of the present invention, and the scope of the present invention is not limited thereby; any alterations and modifications without departing from the spirit of the invention are within the scope of the invention.

Claims (10)

1. A method for preventing a pile hammer head from loosening is characterized by comprising the following steps:
(1) a pin shaft of the pile driving hammer head anti-loosening device penetrates through a shaft hole of the assembly body through a pin bolt to be in threaded connection with a nut; the anti-loosening device for the pile driving hammer head comprises an assembly body, a pin shaft, a nut, an inner hexagonal round-head screw and an end flange, wherein the pin shaft comprises a pin bolt and a pin cover, a first external thread is arranged on the outer side surface of the pin bolt, a first screw hole is formed in the lower end surface of the pin bolt, the first screw hole is provided with a first internal thread, and the direction of the first internal thread is opposite to that of the first external thread; a second screw hole is formed in the lower end face of the nut; the end flange comprises an end bolt and an end cover, and a counter bore is formed in the upper end face of the end cover; the counter bore comprises a counter bore and a first through hole, the counter bore is matched with the lower end of the inner hexagonal round head screw, and the bottom end of the counter bore is communicated with the lower end face of the end cover through the first through hole;
(2) the nut is screwed up along the first external thread of the pin bolt until the distance between the nut and the pin cover reaches a preset distance;
(3) the inner hexagonal round-head screw is twisted into the second screw hole in a forward rotation or reverse rotation manner;
(4) the end flange is screwed up along the first internal thread of the first screw hole through the end bolt, the upper end face of the end cover is abutted against the lower end face of the nut, and the hexagon socket head cap screw is aligned with the counter bore;
(5) and an inner hexagonal wrench penetrates through the first through hole to enable the inner hexagonal round-head screw to stretch downwards into the sinking pit in a reverse rotation or forward rotation mode, and the lower end of the inner hexagonal round-head screw is tightly clamped with the sinking pit in a limiting mode.
2. The method for preventing the pile hammer head from loosening as claimed in claim 1, wherein the number of the hexagon socket head cap screws, the number of the second screw holes and the number of the counter bores are respectively multiple, the second screw holes are evenly distributed on the lower end surface of the nut, and the method further comprises the following steps after the step (2):
twisting the inner hexagonal round-head screws into the second screw holes in a forward rotation manner;
the end flange is screwed up along the first internal thread of the first screw hole through the end bolt, the upper end face of the end cover is abutted against the lower end face of the nut, and the inner hexagonal round head screws are aligned with the counter bores;
and an inner hexagonal wrench penetrates through the first through holes to reversely extend the inner hexagonal round head screws into the sinking pits, and the lower ends of the inner hexagonal round head screws are limited and clamped with the sinking pits.
3. The method for preventing the pile hammer head from loosening as claimed in any one of claims 1 to 2, wherein the hexagon socket head cap screw comprises a screw rod and a nut, the nut and the sunk pit are respectively circular, the aperture of the first through hole is smaller than the outer diameter of the nut, the length of the screw rod is matched with the depth of the second screw hole, the length of the screw rod is greater than three times the depth of the sunk pit, and the step (5) further comprises the following steps:
and an inner hexagonal wrench penetrates through the first through hole to enable the inner hexagonal round-head screw to stretch downwards into the sinking pit in a reverse rotation or forward rotation mode, and the lower end face of the screw cap is abutted against the bottom end face of the sinking pit.
4. The pile hammer head loosening prevention device adopting the loosening prevention method as claimed in any one of claims 1 to 3, which is characterized by comprising an assembly body, a pin shaft, a nut, an inner hexagonal round head screw and an end flange, wherein the assembly body is provided with a shaft hole, the pin shaft comprises a pin bolt, the outer side surface of the pin bolt is provided with a first external thread, the lower end surface of the pin bolt is provided with a first screw hole, the first screw hole is provided with a first internal thread, the direction of the first internal thread is opposite to that of the first external thread, and the pin shaft penetrates through the shaft hole from top to bottom through the pin bolt and is in threaded connection with the nut and the end flange through the first external thread and the first internal thread respectively; the end flange comprises an end cover, a second screw hole and a counter bore are respectively formed in the lower end face of the nut and the upper end face of the end cover, the second screw hole corresponds to the position of the counter bore, the inner hexagonal round-head screw is upwards pre-twisted into the second screw hole, and the inner hexagonal round-head screw downwards extends into the counter bore and is connected with the counter bore in a limiting and clamping mode.
5. The device for preventing the loosening of the pile hammer head as claimed in claim 4, wherein the pin shaft further comprises a pin cover, the upper end surface of the pin bolt is integrally connected with the pin cover, the pin shaft is in close contact with the upper end surface of the assembly body through the lower end surface of the pin cover, and the upper end surface of the nut is in close contact with the lower end surface of the assembly body.
6. The piling hammer head release prevention apparatus of claim 4, wherein the nut has a second internal thread through which the nut is threadedly coupled to the first external thread of the pin bolt.
7. The device for preventing the loosening of the pile hammer head as claimed in claim 4, wherein the end flange further comprises an end bolt, the lower end face of the end bolt is connected with the upper end face of the end cover in an integrated manner, the outer side face of the end bolt is provided with a second external thread, the end flange is in threaded connection with the first internal thread of the first screw hole in a matching manner through the second external thread of the end bolt, and the upper end face of the end cover covers the lower end face of the nut.
8. The device for preventing loosening of the pile hammer head as claimed in any one of claims 4 to 7, wherein the second screw hole is internally provided with a third internal thread, the hexagon socket head cap screw comprises a screw rod, the screw rod is provided with a third external thread, the third external thread is matched with the third internal thread, and the hexagon socket head cap screw is pre-twisted into the second screw hole through the screw rod.
9. The anti-loosening device for the pile hammer head according to claim 8, wherein the hexagon socket head cap screw further comprises a nut, the upper end face of the nut is integrally connected with the lower end face of the screw rod, the counter bore comprises a counter bore and a first through hole, the counter bore is matched with the nut, the bottom end of the counter bore is communicated with the lower end face of the end cover through the first through hole, and the hexagon socket head cap screw extends downwards into the counter bore through the nut and is clamped in the limit position of the counter bore.
10. The device for preventing the loosening of the piling hammer head as claimed in claim 9, wherein the nut and the sinking pit are respectively circular, and the circular nut is respectively matched with, limited and clamped with the circular sinking pit.
CN201911350507.9A 2019-12-24 2019-12-24 Pile driving hammer head loosening prevention method and device Active CN110966297B (en)

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CN201911350507.9A CN110966297B (en) 2019-12-24 2019-12-24 Pile driving hammer head loosening prevention method and device

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Application Number Priority Date Filing Date Title
CN201911350507.9A CN110966297B (en) 2019-12-24 2019-12-24 Pile driving hammer head loosening prevention method and device

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0947716A2 (en) * 1998-04-03 1999-10-06 Fairchild Holding Corp. Fastener system with cross-slot recess and cross-slot bit
EP2571113A1 (en) * 2011-09-16 2013-03-20 Amphenol Air LB Attachment and quick-connection device for a two-part connector
CN202937596U (en) * 2012-05-07 2013-05-15 中国重型机械研究院有限公司 Novel device for locking nut clockwise and counter-clockwise
US20130149068A1 (en) * 2010-08-12 2013-06-13 Allen Forrest Jackson Locking System
CN105257666A (en) * 2015-09-29 2016-01-20 玉环胜友工具有限公司 Self-fastening anti-loose mechanical fastening mechanism
CN108223545A (en) * 2018-02-12 2018-06-29 林平 Locking Anti-off bolt nut assembly
CN208010752U (en) * 2018-02-08 2018-10-26 王楷泉 A kind of aerospace Anti-off bolt
CN109404400A (en) * 2018-01-29 2019-03-01 王卫国 A kind of androgynous reducing derotation fastened by screw component of never becoming loose
CN211343662U (en) * 2019-12-24 2020-08-25 广东力源液压机械有限公司 Anti-loosening device for pile hammer head

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0947716A2 (en) * 1998-04-03 1999-10-06 Fairchild Holding Corp. Fastener system with cross-slot recess and cross-slot bit
US20130149068A1 (en) * 2010-08-12 2013-06-13 Allen Forrest Jackson Locking System
EP2571113A1 (en) * 2011-09-16 2013-03-20 Amphenol Air LB Attachment and quick-connection device for a two-part connector
CN202937596U (en) * 2012-05-07 2013-05-15 中国重型机械研究院有限公司 Novel device for locking nut clockwise and counter-clockwise
CN105257666A (en) * 2015-09-29 2016-01-20 玉环胜友工具有限公司 Self-fastening anti-loose mechanical fastening mechanism
CN109404400A (en) * 2018-01-29 2019-03-01 王卫国 A kind of androgynous reducing derotation fastened by screw component of never becoming loose
CN208010752U (en) * 2018-02-08 2018-10-26 王楷泉 A kind of aerospace Anti-off bolt
CN108223545A (en) * 2018-02-12 2018-06-29 林平 Locking Anti-off bolt nut assembly
CN211343662U (en) * 2019-12-24 2020-08-25 广东力源液压机械有限公司 Anti-loosening device for pile hammer head

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