A disc spring hammer core buffer device and its installation and disassembly methods.

Abstract

This invention belongs to the field of engineering machinery technology and discloses a disc spring hammer core buffer device and its installation and disassembly methods. Through scientific structural design, the buffer device is separated from the hammer core as a whole, making the installation and disassembly of the disc spring more convenient. The installation and disassembly method of the buffer device is to set an upper guide sleeve and a lower guide sleeve on the inner side of the disc spring, and use the upper guide sleeve and the lower guide sleeve to compress and pre-tighten the disc spring from the inside. This allows the rebound force of the disc spring to be released in advance during the installation and disassembly of the buffer device, avoiding the burning of the connecting threads caused by the rebound force of the disc spring during the installation and disassembly of the buffer device. This makes the installation and disassembly of the disc spring hammer core buffer device more convenient and improves the installation and disassembly efficiency. In addition, it can also achieve precise control of the amount of pre-tightening force applied, ensuring the buffering and vibration absorption capacity of the buffer device, improving the buffering and vibration absorption effect of the buffer device, and improving the safety and stability of the device.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, and relates to hydraulic pile hammers, and more particularly to a disc spring hammer core buffer device and its installation and disassembly methods. Background Technology

[0002] Currently, hydraulic pile hammers are frequently used in the construction process to ensure the foundation of buildings is solid. Compared with traditional pile hammers, hydraulic pile hammers have advantages such as low noise, no pollution, and low vibration, which meet environmental protection requirements, and have excellent dynamic characteristics and controllability. Existing single-acting hydraulic hammers primarily use a hydraulic system to lift the hammer core to a certain height and then release it, converting the hammer's gravitational potential energy into kinetic energy. This kinetic energy is then released as the hammer falls freely, directly impacting the anvil or pile cap. The hammer core and anvil work on the target pile through direct interaction. After striking a hard object, the hydraulic hammer rebounds at high speed. Because this rebound is instantaneous, the cylinder doesn't have enough time to discharge oil. This instantaneous rebound of the hammer impacts the cylinder, which in turn impacts the hydraulic hammer housing. This causes the hydraulic hammer housing and other connected equipment to vibrate, generating strong vibrations and noise. This can easily damage or cause failure of the hydraulic hammer housing and its internal components. Furthermore, the rebound of the hydraulic hammer housing can cause loaders, excavators, and other load-bearing equipment connected to the frame to shake violently, accelerating material and structural fatigue, shortening equipment lifespan, and resulting in poor operator comfort.

[0003] To address the issue of vibrations generated by the hydraulic hammer body acting on the target object, which can easily damage the hammer itself, a buffer mechanism is installed between the hydraulic cylinder and the hammer. This mechanism, using springs or buffer components, effectively cushions the entire hammer's movement. Existing hammer core buffer structures generally include rubber pad-type and disc spring-type mechanisms. Disc springs, due to their high stiffness and strong damping capacity, can withstand large loads with minimal deformation. By combining different types of disc springs in stacked or paired configurations, even greater load-bearing capacity or deformation capacity can be achieved. Disc springs exhibit no aging phenomenon compared to rubber pads and are used as powerful damping and vibration-damping springs in heavy machinery. Therefore, disc springs are more suitable for the core buffer device of large pile hammers. However, to ensure the damping and vibration-damping capacity of the buffer device, the disc springs used in the buffer device must be pre-loaded during installation, i.e., the disc springs are in a semi-compressed state. This pre-load is especially important for large pile hammers.

[0004] The prior art, the applicant's earlier application, application number CN201821699937.2, discloses a hydraulic hammer elastic connection and buffer shock absorption structure, which includes a second elastic connection and buffer structure. The second elastic connection and buffer structure is disposed on a hydraulic hammer buffer seat. The hydraulic hammer buffer seat is disposed between the hydraulic hammer cylinder assembly and the hydraulic hammer core. The hydraulic hammer buffer seat is provided with a ring of annular protrusions. The second elastic connection and buffer structure includes a third buffer pad and a fourth buffer pad (82). The third buffer pad (81) and the fourth buffer pad are respectively disposed on the upper and lower sides of the buffer seat protrusion.

[0005] The prior art, a differential hydraulic pile hammer with application number CN201820462975.X, includes a hydraulic cylinder and a hammer core. The hammer core is slidably supported on a hammer core guide member. The hydraulic cylinder is fixedly connected to the hammer core guide member. The piston rod of the hydraulic cylinder is connected to the hammer core. The extended end of the piston rod is fixedly connected to a coupling. One end of the coupling is hinged to a hammer core connecting rod. The other end of the hammer core connecting rod is connected to the hammer core through a disc spring. The disc spring includes an upper disc spring and a lower disc spring. The hammer core connecting rod is provided with a connecting rod shoulder. The upper and lower disc springs are respectively installed on the upper and lower sides of the connecting rod shoulder. The upper and lower disc springs are press-fitted into the corresponding disc spring mounting holes of the hammer core through disc spring caps.

[0006] As can be seen from the above-mentioned prior art, the disc spring buffer is directly installed in the inner cavity of the hammer core. When installing the disc spring, the connecting bolts between the pressure cap and the hammer core need to be tightened to partially compress the disc spring in order to apply a preload to the disc spring. Similarly, the rebound force of the disc spring will act on the connecting bolts. When tightening the connecting bolts, the threads of the connecting bolts will burn out, making installation difficult. At the same time, the connecting bolts with burnt threads are also difficult to disassemble.

[0007] Therefore, there is an urgent need to develop a disc spring hammer core buffer device that is easy to install and disassemble, as well as its installation and disassembly methods. Summary of the Invention

[0008] The purpose of this invention is to provide a disc spring hammer core buffer device and its installation and disassembly methods. Through structural design and the coordination of various parts and multiple steps, the disc spring hammer core buffer device is separated from the hammer core of a hydraulic pile hammer as a whole. First, the disc spring requiring preload is installed in the independent buffer device. Then, the buffer device with the disc spring installed is combined with the hammer body of the hammer core to form the hammer core of the hydraulic pile hammer, making the installation and disassembly of the disc spring more convenient. The installation and disassembly method of this buffer device involves setting an upper guide sleeve and a lower guide sleeve on the inner side of the disc spring. By using the upper and lower guide sleeves to compress and pre-tighten the disc spring from the inside, the rebound force of the disc spring can be released in advance during the installation and disassembly of the buffer device. This prevents the connecting threads from burning out due to the rebound force of the disc spring during installation and disassembly, making the installation and disassembly of the disc spring hammer core buffer device more convenient and improving the efficiency of installation and disassembly. In addition, it also enables precise control of the amount of pre-tightening force applied, ensuring the buffer device's damping and vibration absorption capacity, improving the damping and vibration absorption effect of the buffer device, improving the safety and stability of the device, reducing the failure rate of the equipment, and extending the service life of the equipment.

[0009] The technical solution is as follows:

[0010] A method for installing a disc spring hammer core buffer device, the disc spring hammer core buffer device comprising a lower flange, a connecting cylinder, a connecting rod, a hammer core top cover, an upper guide sleeve, a lower guide sleeve, an upper buffer disc spring, and a lower buffer disc spring. The lower flange includes a flange body and an annular flange boss, the inner ring of the flange boss forming a flange guide cavity. The flange body has a flange through hole communicating with the flange guide cavity in the middle, and the outer side of the flange boss has a flange connection external thread. The hammer core top cover includes a top cover body and an annular top cover boss, the hammer core top cover has a top cover through hole in the middle, and the lower edge of the top cover through hole has a... The top cover guide cavity has an external thread for connection on the outer side of the top cover boss; an annular boss is provided in the middle of the inner wall of the connecting cylinder, and a guide hole is formed on the inner side of the annular boss; the upper and lower inner edges of the connecting cylinder are respectively provided with upper and lower internal threads; the connecting rod includes a connecting rod, a pre-tightening pull head, and a ball head; the ball head and the pre-tightening pull head are respectively connected to the upper and lower ends of the connecting rod; the bottom surface of the pre-tightening pull head is provided with a pull thread hole in the middle; the lower guide sleeve has a lower guide pressure support surface, and the upper guide sleeve has an upper guide pressure support surface; the installation method includes the following steps:

[0011] S1. An installation auxiliary bracket is provided, comprising a first tooling frame, a double-ended screw, a second tooling frame, and a ball head seat. The first tooling frame comprises a first top plate, a first bottom plate, and four first support columns. The upper ends of the four first support columns are respectively connected to the four corners of the bottom surface of the first top plate, and the lower ends of the four first support columns are respectively connected to the top surface of the first bottom plate. A first through hole is provided in the middle of the first top plate. The second tooling frame comprises a second top plate, a second bottom plate, and four second support columns. The upper ends of the four second support columns are respectively connected to the four corners of the bottom surface of the second top plate, and the lower ends of the four second support columns are respectively connected to the top surface of the second bottom plate. A second through hole is provided in the middle of the second top plate, and multiple first screw holes are provided in the middle of the top surface of the second bottom plate. Multiple first bolt holes are provided on the ball head seat.

[0012] S2. First, fix the first tooling frame on a flat ground and fix the lower flange on the top surface of the first top plate. Then, put the lower buffer disc spring, lower guide sleeve, and connecting cylinder on the lower flange in sequence. Next, rotate the connecting cylinder downward so that the lower connecting internal thread of the connecting cylinder engages with the flange connecting external thread of the lower flange. When the connecting cylinder cannot be rotated easily, it indicates that the lower guide pressure support surface of the lower guide sleeve and the lower buffer disc spring are in close contact. At this time, the gap between the bottom surface of the lower guide sleeve and the bottom of the flange guide cavity is H2, and the gap between the end face of the lower end of the connecting cylinder and the circumferential edge of the top surface of the flange body is H1, where H1 is less than H2.

[0013] S3. First, the connecting rod is inserted into the guide hole of the connecting cylinder from top to bottom using the pre-tightening pull head. Then, the upper end of the double-ended screw is passed through the first through hole, the flange through hole, the lower guide sleeve and the pull thread hole on the bottom surface of the pre-tightening pull head from bottom to top, so that the bottom surface of the pre-tightening pull head fits against the top surface of the lower guide sleeve. The first nut is then threadedly connected to the lower end of the double-ended screw.

[0014] S4. Continue to tighten the first nut at the lower end of the double-ended screw with a wrench. Use the double-ended screw to pull the connecting rod downwards. The bottom surface of the pre-tightening pull head presses against the top surface of the lower guide sleeve and moves downwards together, causing the lower guide sleeve's lower guide bearing surface to compress the lower buffer disc spring until the compression stroke gap H2 disappears. At this point, the connecting cylinder will no longer be subject to the force of the lower buffer disc spring. Next, rotate the connecting cylinder downwards until the end face of the lower end of the connecting cylinder is tightly fitted with the circumferential edge of the top surface of the flange body. Then, slowly loosen the first nut at the lower end of the double-ended screw, allowing the lower guide sleeve to return to the gap of H2-H1 between the bottom surface of the lower guide sleeve and the bottom of the flange guide cavity under the spring force of the lower buffer disc spring. Then, remove the double-ended screw and the first nut at its lower end. At this point, the lower mechanism in the disc spring hammer core buffer device is installed.

[0015] S5. Fix the second tooling frame on a flat ground and fix the hammer core top cover to the top surface of the second top plate. Then, put the upper buffer disc spring and the upper guide sleeve on the hammer core top cover in sequence. Then, flip the lower mechanism of the disc spring hammer core buffer device and use the upper end of the connecting rod to pass through the upper guide sleeve, the top cover through hole and the second through hole from top to bottom in sequence. The connecting sleeve of the lower mechanism is then sleeved on the outside of the upper buffer disc spring.

[0016] S6. Rotate the connecting cylinder of the lower mechanism downwards so that the upper connecting internal thread of the connecting cylinder engages with the top cover connecting external thread of the hammer core top cover. When the connecting cylinder of the lower mechanism cannot be rotated easily, it indicates that the upper guide pressure support surface of the upper guide sleeve and the upper buffer disc spring are in close contact. At this time, the gap between the top surface of the upper guide sleeve and the bottom of the guide cavity of the top cover is H4, and the gap between the end face of the upper end of the connecting cylinder and the circumferential edge of the bottom surface of the top cover body is H3, where H3 is less than H4. Due to the action of the lower buffer disc spring, the circumferential edge of the top surface of the pre-tightening pull head is in close contact with the bottom surface of the upper guide sleeve. Then, use a ball head seat to wrap around the ball head at the upper end of the connecting rod, and use the first connecting bolt to thread through the first bolt hole of the ball head seat from top to bottom and connect with the first screw hole on the second base plate, ensuring that the distance between the bottom surface of the ball head seat and the top surface of the second base plate is H5, where H5 is greater than H4.

[0017] S7. Continue to tighten the first connecting bolt with a wrench, pull the ball head of the connecting rod wrapped with the ball head seat downwards, and at the same time use the connecting rod to press the circumferential edge of the top surface of the pre-tightening pull head against the bottom surface of the upper guide sleeve and move them downwards together, so that the upper guide sleeve's upper guide abutment support surface compresses the upper buffer disc spring until the compression stroke gap H4 disappears. At this time, the connecting cylinder of the lower mechanism will not be subject to the force of the upper buffer disc spring. Then, rotate the connecting cylinder of the lower mechanism downwards until the top surface of the connecting cylinder of the lower mechanism is tightly fitted with the circumferential edge of the bottom surface of the top cover body until the gap H3 disappears. Next, slowly loosen the first connecting bolt. Under the spring force of the upper buffer disc spring, the top surface of the upper guide sleeve and the bottom of the guide cavity of the top cover will return to the gap H4-H3. Then remove the ball head seat. At this point, the disc spring hammer core buffer device is installed.

[0018] The bottom surface of the flange body is provided with a plurality of flange threaded holes, which are evenly distributed circumferentially around the flange through hole; the first top plate is also provided with a plurality of second bolt holes, which are evenly distributed circumferentially around the first through hole; step S2 further includes the following steps:

[0019] S21. First, place the lower flange on the top surface of the first top plate. Then, use the second connecting bolt to thread it through the second bolt hole from bottom to top and connect it to the flange thread hole, thereby fixing the lower flange on the top surface of the first top plate.

[0020] The top surface of the flange boss forms a flange disc spring support surface. The lower guide sleeve includes a lower guide cylinder and an annular lower guide preload boss. The lower guide preload boss is installed on the upper end of the outer side of the lower guide cylinder, and the bottom surface of the lower guide preload boss forms the lower guide pressure support surface. Step S2 further includes the following steps:

[0021] S22. First, place the lower buffer disc spring on the flange disc spring support surface, then insert the lower guide sleeve into the flange guide cavity, so that the lower buffer disc spring is supported on the lower guide pressure support surface. Next, put the connecting sleeve on the outer side of the lower buffer disc spring, so that the lower buffer disc spring, the lower guide sleeve, and the connecting sleeve are sequentially put on the lower flange.

[0022] The top cover body has multiple top cover bolt holes on its circumferential edge, and the multiple top cover bolt holes are evenly distributed around the top cover through hole; the second top plate also has multiple third bolt holes, and the multiple third bolt holes are evenly distributed around the second through hole; step S5 further includes the following steps:

[0023] S51. First, place the hammer core top cover on the top surface of the second top plate. Then, use the third connecting bolt to pass through the bolt hole of the top cover and the third bolt hole from top to bottom and thread it to the second nut. Tighten the second nut with a wrench to fix the hammer core top cover on the top surface of the second top plate.

[0024] The top surface of the top cover boss forms a top cover disc spring support surface. The upper guide sleeve includes an upper guide cylinder and an annular upper guide pre-tightening boss. The upper guide pre-tightening boss is installed at the lower end of the outer side of the upper guide cylinder, and the top surface of the upper guide pre-tightening boss forms the upper guide pressing support surface. Step S2 further includes the following steps:

[0025] S52. First, place the upper buffer disc spring on the disc spring support surface of the top cover, then insert the upper guide sleeve into the guide cavity of the top cover, so that the upper buffer disc spring is supported on the upper guide pressing support surface, thereby so that the upper buffer disc spring and the upper guide sleeve are sequentially fitted on the top cover of the hammer core.

[0026] The outer side of the connecting cylinder is provided with multiple wrench holes. A special wrench is inserted into the wrench holes, and the connecting cylinder is rotated and moved downward using the special wrench.

[0027] The ball joint seat includes a first half-ball joint surround, a second half-ball joint surround, multiple surround connecting bolts, and multiple surround nuts. The first half-ball joint surround has multiple first surround bolt holes on both sides, and the second half-ball joint surround has multiple second surround bolt holes on both sides. Step S6 further includes the following steps:

[0028] S61. The first half of the ball head surround and the second half of the ball head surround are respectively wrapped around the left and right sides of the ball head. The surround connecting bolts pass through the first surround bolt hole and the second surround bolt hole in sequence and are threadedly connected to the surround nut, so that the ball head seat is wrapped around the ball head at the upper end of the connecting rod.

[0029] A method for disassembling a disc spring hammer core buffer device includes the following steps:

[0030] S81. A disc-shaped spring hammer core buffer device is provided, wherein the disc-shaped spring hammer core buffer device is a device that has been installed using the above installation method.

[0031] S82. Fix the second tooling frame on a flat ground, flip the disc spring hammer core buffer device, insert the upper end of the connecting rod into the second through hole of the second top plate from top to bottom, and fix the hammer core top cover of the disc spring hammer core buffer device on the top surface of the second top plate.

[0032] S83. Using the ball head seat to wrap around the ball head at the upper end of the connecting rod, the first connecting bolt passes through the first bolt hole of the ball head seat from top to bottom and is pre-connected to the first screw hole on the second base plate. The first connecting bolt is tightened with a wrench, and the ball head of the connecting rod wrapped by the ball head seat is pulled downward. At the same time, the circumferential edge of the pre-tightening pull head is pressed against the bottom surface of the upper guide sleeve and moved downward together, so that the upper guide support surface of the upper guide sleeve compresses the upper buffer disc spring until the upper end face of the upper guide sleeve abuts against the bottom of the guide cavity of the top cover. At this time, the connecting cylinder will not be subject to the force of the upper buffer disc spring. Then, the connecting cylinder is rotated and moved upward until the upper end of the connecting cylinder is disengaged from the hammer core top cover. Then, the first connecting bolt and the ball head seat are removed. At this point, the hammer core top cover, the upper buffer disc spring, and the upper guide sleeve have been completely disassembled from the disc spring hammer core buffer device, forming the lower mechanism of the disc spring hammer core buffer device.

[0033] S84. Fix the first fixture on a flat ground, take out the lower part of the disc spring hammer core buffer device from the second fixture, and flip it over. Fix the lower flange of the lower part of the disc spring hammer core buffer device to the top surface of the first top plate. Connect the upper end of the double-ended screw to the first through hole, the flange through hole, the lower guide sleeve and the tension thread hole on the bottom surface of the pre-tightening tension head in sequence from bottom to top, and connect the lower end of the double-ended screw with the first nut.

[0034] S85. Continue to tighten the first nut at the lower end of the double-ended screw with a wrench. Use the double-ended screw to pull the connecting rod downward. The bottom surface of the pre-tightening pull head presses against the top surface of the lower guide sleeve and moves downward together, so that the lower guide sleeve's lower guide abutment support surface compresses the lower buffer disc spring until the lower end face of the lower guide sleeve abuts against the bottom of the flange guide cavity. At this time, the connecting cylinder will not be subject to the force of the lower buffer disc spring. Then, rotate the connecting cylinder upward until the lower end of the connecting cylinder is disengaged from the lower flange. Then remove the first nut and the double-ended screw. At this point, the disc spring hammer core buffer device has been completely disassembled.

[0035] A method for disassembling a disc spring hammer core buffer device includes the following steps:

[0036] S91. A disc-shaped spring hammer core buffer device is provided, wherein the disc-shaped spring hammer core buffer device is a device that has been installed using the above installation method.

[0037] S92. Fix the first tooling frame on a flat ground, fix the lower flange of the disc spring hammer core buffer device to the top surface of the first top plate, and connect the upper end of the double-ended screw to the pull thread hole on the bottom surface of the pre-tightening pull head by passing through the first through hole, the flange through hole, and the lower guide sleeve from bottom to top, and use the first nut to connect the lower end of the double-ended screw.

[0038] S93. Continue to tighten the first nut at the lower end of the double-ended screw with a wrench. Use the double-ended screw to pull the connecting rod downward. The bottom surface of the pre-tightening pull head presses against the top surface of the lower guide sleeve and moves downward together, so that the lower guide sleeve's lower guide support surface compresses the lower buffer disc spring until the lower end face of the lower guide sleeve abuts against the bottom of the flange guide cavity. At this time, the connecting cylinder will not be subject to the force of the lower buffer disc spring. Then, rotate the connecting cylinder upward until the lower end of the connecting cylinder is disengaged from the lower flange. Then, remove the first nut and the double-ended screw. At this point, the lower flange, the lower buffer disc spring, and the lower guide sleeve have been completely disassembled from the disc spring hammer core buffer device, forming the upper mechanism of the disc spring hammer core buffer device.

[0039] S94. Fix the second fixture on a flat ground, take out the upper part of the disc spring hammer core buffer device from the first fixture, flip it over, insert the upper end of the connecting rod into the second through hole of the second top plate from top to bottom, and fix the hammer core top cover of the disc spring hammer core buffer device on the top surface of the second top plate.

[0040] S95. Using the ball head seat to wrap around the ball head at the upper end of the connecting rod, the first connecting bolt passes through the first bolt hole of the ball head seat from top to bottom and is pre-connected to the first screw hole on the second base plate. Continue to tighten the first connecting bolt with a wrench, pull the ball head of the connecting rod wrapped by the ball head seat downward, and at the same time use the connecting rod to press the circumferential edge of the pre-tightening pull head top surface onto the bottom surface of the upper guide sleeve and move them downward together, so that the upper guide abutment support surface of the upper guide sleeve compresses the upper buffer disc spring until the upper end face of the upper guide sleeve abuts the bottom of the guide cavity of the top cover. At this time, the connecting cylinder will not be subject to the force of the upper buffer disc spring. Then, rotate the connecting cylinder upward until the upper end of the connecting cylinder is disengaged from the hammer core top cover. Then remove the first connecting bolt and the ball head seat; at this point, the disc spring hammer core buffer device is completely disassembled.

[0041] A disc spring hammer core buffer device using the above-described installation method includes a lower flange, a connecting cylinder, a connecting rod, a hammer core top cover, an upper guide sleeve, a lower guide sleeve, an upper buffer disc spring, and a lower buffer disc spring. The lower flange includes a flange body and an annular flange boss, the inner ring of which forms a flange guide cavity. The hammer core top cover includes a top cover body and an annular top cover boss, with a top cover through hole in the middle and a top cover guide cavity on the lower edge of the top cover through hole. The hammer core top cover and the lower flange are respectively connected to the upper and lower ends of the connecting cylinder. The upper guide sleeve and the lower guide sleeve are respectively inserted into the top cover guide cavity and the flange guide cavity. Inside the cavity, an upper disc spring cavity and a lower disc spring cavity are formed with the inner sidewall of the connecting cylinder, respectively. The upper and lower buffer disc springs are installed in the upper and lower disc spring cavities, respectively. The connecting rod includes a connecting rod and a pre-tensioning pull head. The pre-tensioning pull head is connected to the lower end of the connecting rod. The connecting rod is installed between the upper guide sleeve and the lower guide sleeve through the pre-tensioning pull head. The upper end of the connecting rod passes through the upper guide sleeve and the top cover through hole from bottom to top. The top surface of the pre-tensioning pull head abuts against the lower end surface of the upper guide sleeve, and the bottom surface of the pre-tensioning pull head abuts against the upper end surface of the lower guide sleeve.

[0042] It should be noted that:

[0043] The aforementioned "first, second..." does not represent a specific quantity or order, but is merely used to distinguish the names.

[0044] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] The direction indicated by the aforementioned "inner" refers to the direction towards the vertical central axis of this disc-shaped spring hammer core buffer device.

[0046] The direction indicated by the aforementioned "outer" refers to the direction away from the vertical central axis of this disc-shaped spring hammer core buffer device.

[0047] The advantages or principles of the present invention are explained below:

[0048] 1. The installation method of the disc spring hammer core buffer device provided by this invention overcomes the shortcomings of existing technology by using reverse thinking. Traditional threaded connection installations all use a forceful tightening method. Because the disc spring hammer core buffer device contains a disc spring, and the disc spring in the buffer device needs to be pre-tightened, that is, the disc spring is partially compressed to achieve the purpose of applying pre-tightening force to the disc spring, similarly, the rebound force of the disc spring will act on the threaded connection. If the threaded connection is installed by forceful tightening, it is not only difficult to install, but it will also burn out the threads. However, the installation method of the disc spring hammer core buffer device of this invention is exactly the opposite of the traditional method. The installation method of this invention first releases the rebound force of the disc spring to avoid the connection thread burning out due to the rebound force of the disc spring, and then tightens the threaded connection, thereby easily installing the threaded connection of the buffer device, which can effectively reduce the failure rate of the equipment and extend the service life of the equipment.

[0049] 2. The installation method of the disc spring hammer core buffer device provided by this invention, through scientific structural design and the coordination of multiple steps, separates the buffer mechanism in the existing hydraulic pile hammer from the hammer core. With the aid of an installation auxiliary bracket, the disc spring requiring preload is first installed in the independent buffer device. Then, the buffer device with the disc spring installed is fixed as a whole to the top of the hammer core with several bolts, thereby buffering the vibration generated by the hydraulic hammer body acting on the target object. This makes the installation and disassembly of the disc spring more convenient. The disc spring hammer core buffer device includes a lower flange, a connecting cylinder, a connecting rod, a hammer core top cover, an upper guide sleeve, a lower guide sleeve, an upper buffer disc spring, and a lower buffer disc spring. During installation or disassembly, the buffer device is also equipped with an installation auxiliary bracket. The installation auxiliary support includes a first tooling frame, a double-ended screw, a second tooling frame, and a ball head seat. During installation, first, fix the first tooling frame on a flat surface. Then, fix the lower flange to the top surface of the first top plate. Next, sequentially fit the lower buffer disc spring, lower guide sleeve, and connecting cylinder onto the lower flange. Then, rotate the connecting cylinder downwards for the first time, allowing it to engage with the lower flange. When the connecting cylinder cannot rotate easily, it indicates that the lower guide sleeve's lower guide bearing surface is in close contact with the lower buffer disc spring. It also indicates that the bottom surface of the connecting cylinder's annular boss is in close contact with the lower buffer disc spring, and the lower buffer disc spring initially provides rebound support to the connecting cylinder's annular boss. At this point, the gap between the bottom surface of the lower guide sleeve and the bottom of the flange guide cavity is H2. H2 is the total compression of the lower buffer disc spring, and the gap between the end face of the lower end of the connecting cylinder and the circumferential edge of the top surface of the flange body is H1, where H1 is less than H2; H1 is the pre-compression of the lower buffer disc spring, and the rebound force generated by the pre-compression H1 is the preload that the lower buffer disc spring needs to be pre-applied, thus realizing precise control of the amount of preload applied to the lower buffer disc spring; during the design, by adjusting the height of H1, the amount of preload applied to the lower buffer disc spring can be controlled, ensuring the buffering and vibration absorption capacity of the buffer device and improving the safety and stability of the device.

[0050] Next, insert the pre-tightening pull head into the guide hole, and then connect it to the pull thread hole of the connecting rod from below using a double-ended screw. Pull the lower guide sleeve down through the connecting rod to compress the lower buffer disc spring until the compression stroke gap H2 disappears. Use the lower guide sleeve to compress and pre-tighten the lower buffer disc spring from the inside, pre-releasing the rebound force of the disc spring. At this time, the connecting cylinder will not be subject to the force of the lower buffer disc spring. Then, rotate the connecting cylinder downward for the second time until the end face of the lower end of the connecting cylinder is tightly fitted with the circumferential edge of the top surface of the flange body. Then release the downward pull force on the connecting rod, allowing the lower guide sleeve to return to the gap of H2-H1 between the bottom surface of the lower guide sleeve and the bottom of the flange guide cavity under the spring force of the lower buffer disc spring. At this time, the lower buffer disc spring has completed the pre-compression amount of H1. Thus, the lower mechanism in the disc spring hammer core buffer device is installed.

[0051] Fix the second fixture on a flat surface and fix the hammer core cover to the top surface of the second top plate. Then, place the upper buffer disc spring and the upper guide sleeve onto the hammer core cover in sequence. Next, flip the lower mechanism of the disc spring hammer core buffer device and pass it through the upper guide sleeve, the top cover through hole, and the second through hole in sequence. Then, rotate the connecting cylinder downwards for the third time, so that the connecting cylinder and the hammer core cover are screwed together. When the connecting cylinder of the lower mechanism cannot be rotated easily, it indicates that the upper guide sleeve's upper guide pressure support surface is in close contact with the upper buffer disc spring. It also indicates that the top surface of the annular boss of the connecting cylinder is in close contact with the upper buffer disc spring. The upper buffer disc spring initially aligns with the top surface of the annular boss. Rebound support; at this time, the gap between the top surface of the upper guide sleeve and the bottom of the guide cavity of the top cover is H4, which is the total compression of the upper buffer disc spring, while the gap between the end face of the upper end of the connecting cylinder and the circumferential edge of the bottom surface of the top cover body is H3, where H3 is less than H4; H3 is the pre-compression of the upper buffer disc spring, and the rebound force generated by the pre-compression H3 is the preload force that the upper buffer disc spring needs to be applied, thus realizing precise control of the amount of preload force applied to the upper buffer disc spring; during the design, by adjusting the height of H3, the amount of preload force applied to the upper buffer disc spring can be controlled, ensuring the buffering and vibration absorption capacity of the buffer device and improving the safety and stability of the device.

[0052] Next, the ball joint is used to pull down the connecting rod, causing the upper guide sleeve's upper guide pressure support surface to compress the upper buffer disc spring until the compression stroke gap H4 disappears. The lower guide sleeve is then used to compress and pre-tighten the upper buffer disc spring from the inside, pre-releasing the spring's rebound force. At this point, the connecting cylinder will not be subject to the force of the upper buffer disc spring. Then, the connecting cylinder is rotated and moved downwards for the fourth time until the top surface of the connecting cylinder of the lower mechanism is tightly fitted with the circumferential edge of the bottom surface of the top cover body until the gap H3 disappears. Then, the ball joint's pulling force on the connecting rod is released, allowing the upper guide sleeve, under the spring force of the upper buffer disc spring, to restore the gap between the top surface of the upper guide sleeve and the bottom of the top cover guide cavity to H4-H3. At this point, the upper buffer disc spring has completed the pre-compression amount of H3. Thus, the disc spring hammer core buffer device is installed.

[0053] This disc spring hammer core buffer device is separated from the hammer core of the hydraulic pile hammer as a whole. First, the disc spring requiring preload is installed in the independent buffer device. Then, the buffer device with the disc spring installed is combined with the hammer body of the hammer core to form the hammer core of the hydraulic pile hammer, making the installation and disassembly of the disc spring more convenient. The installation and disassembly method of this buffer device involves setting an upper guide sleeve and a lower guide sleeve inside the disc spring. These guide sleeves compress and preload the disc spring from the inside, thus releasing the rebound force of the disc spring before installation and disassembly. This prevents the connecting threads from burning out due to the rebound force of the disc spring during installation and disassembly, making the installation and disassembly of this disc spring-type hammer core buffer mechanism more convenient and improving installation and disassembly efficiency. Furthermore, it allows for precise control of the amount of preload applied, ensuring the buffer device's damping and vibration absorption capacity, improving the damping and vibration absorption effect, and enhancing the safety and stability of the device.

[0054] 3. The flange body of the present invention has multiple flange threaded holes on the bottom surface. The flange threaded holes facilitate fixing the lower flange to the top surface of the first top plate of the first tooling frame, thus facilitating the fixed installation of the lower flange.

[0055] 4. The lower guide sleeve of the present invention includes a lower guide cylinder and a lower guide pre-tightening boss, and a lower guide pressing support surface is formed on the bottom surface of the lower guide pre-tightening boss. The lower guide pressing support surface and the flange disc spring support surface on the top surface of the flange boss respectively form the upper and lower support surfaces of the lower buffer disc spring, which facilitates the compression control of the lower buffer disc spring, thereby realizing the control of the amount of pre-tightening force applied to the lower buffer disc spring.

[0056] 5. The present invention provides multiple top cover bolt holes on the circumferential edge of the top cover body, and provides multiple third bolt holes on the second top plate of the second tooling frame to facilitate the fixed installation of the hammer core top cover.

[0057] 6. The upper guide sleeve of the present invention includes an upper guide cylinder and an upper guide pre-tightening boss, and an upper guide pressing support surface is formed on the top surface of the upper guide pre-tightening boss. The upper guide pressing support surface and the top cover disc spring support surface on the top surface of the top cover boss respectively form the upper and lower support surfaces of the upper buffer disc spring, which facilitates the compression control of the upper buffer disc spring, thereby realizing the control of the amount of pre-tightening force applied to the upper buffer disc spring.

[0058] 7. The present invention provides multiple wrench holes on the outer side of the connecting cylinder, which facilitates the rotation drive of the connecting cylinder.

[0059] 8. The present invention designs the ball head seat as two half-surrounding parts, which facilitates the wrapping and connection of the ball head of the connecting rod.

[0060] 9. This invention also provides a method for disassembling the disc spring hammer core buffer device. Traditional threaded connection disassembly involves forceful reverse twisting. Since the disc spring hammer core buffer device contains disc springs, and these disc springs are pre-tightened, meaning they are in a semi-compressed state, the threaded connection between the lower flange or hammer core top cover and the connecting cylinder is under tension due to the rebound force of the disc springs. If forceful reverse twisting is used to disassemble the threaded connection, it will not only be difficult to disassemble but may also burn out the threads. The disassembly method of the disc spring hammer core buffer device of this invention is exactly the opposite of the traditional method. The disassembly method of this invention is to first release the rebound force of the disc springs and then twist the connecting cylinder in the reverse direction, thereby easily removing the threaded connection between the lower flange or hammer core top cover and the connecting cylinder. The disassembly method of this invention also requires the assistance of an installation support bracket. First, the second tooling bracket is fixed on a flat ground. Then, the pre-installed buffer device is flipped over, and the connecting rod is inserted into the second through hole of the second top plate to fix the hammer core cover to the top surface of the second top plate. Then, the ball joint is used to pull the connecting rod downward, causing the upper guide sleeve to press against the support surface and compress the upper buffer disc spring, thereby releasing the preload of the upper buffer disc spring and thus releasing the force of the upper buffer disc spring on the connecting cylinder. Next, the connecting cylinder is rotated upward until it is disengaged from the hammer core cover. Since the preload of the upper buffer disc spring has been released before rotating the connecting cylinder to disengage from the hammer core cover, the disassembly of the hammer core cover is very convenient and labor-saving, and avoids... To prevent the connecting threads from burning out during disassembly and improve disassembly efficiency, after the upper buffer disc spring is disassembled, it is flipped over again, and the lower flange of the lower mechanism of the disc spring hammer core buffer device is fixed to the first top plate of the first tooling. Using the same principle, the connecting rod is pulled downward by the double-ended screw, so that the lower guide sleeve's lower guide abutment support surface compresses the lower buffer disc spring, thereby releasing the preload of the lower buffer disc spring and thus releasing the force of the lower buffer disc spring on the connecting cylinder. Then, the connecting cylinder is rotated upward until the connecting cylinder is disengaged from the lower flange. Since the preload of the lower buffer disc spring has been released before rotating the connecting cylinder to disengage from the lower flange, the disassembly of the lower flange is very convenient and labor-saving, and the connecting threads are prevented from burning out during disassembly, thus improving disassembly efficiency.

[0061] 10. The present invention also provides another method for disassembling the disc spring hammer core buffer device. The principle is the same as that of the first disassembly method. The difference is that the first disassembly method first disassembles the threaded connection between the connecting cylinder and the top cover of the hammer core, and then disassembles the threaded connection between the connecting cylinder and the lower flange; while the second disassembly method first disassembles the threaded connection between the connecting cylinder and the lower flange, and then disassembles the threaded connection between the connecting cylinder and the top cover of the hammer core. The principle of the two is the same, but the order is reversed.

[0062] 11. The present invention also provides a disc spring hammer core buffer device using the above-mentioned installation method, which includes a lower flange, a connecting cylinder, a connecting rod, a hammer core top cover, an upper guide sleeve, a lower guide sleeve, an upper buffer disc spring, and a lower buffer disc spring. The disc spring hammer core buffer device is separated from the hammer core of the hydraulic pile hammer as a whole. An upper guide sleeve and a lower guide sleeve are provided inside the disc spring in the buffer device. The upper guide sleeve and the lower guide sleeve compress and pre-tighten the disc spring from the inside, so that the rebound force of the disc spring can be released in advance when the buffer device is installed and disassembled, avoiding the connection threads from burning due to the rebound force of the disc spring during the installation and disassembly of the buffer device. This makes the installation and disassembly of the disc spring hammer core buffer device more convenient, improves the installation and disassembly efficiency, and saves manpower and material resources. Attached Figure Description

[0063] Figure 1 This is a schematic flowchart illustrating the installation method of the disc spring hammer core buffer device according to an embodiment of the present invention.

[0064] Figure 2 This is a three-dimensional cross-sectional view of the disc spring hammer core buffer device according to an embodiment of the present invention.

[0065] Figure 3 This is a cross-sectional structural diagram of the flange in an embodiment of the present invention.

[0066] Figure 4 This is a cross-sectional structural diagram of the connecting cylinder according to an embodiment of the present invention.

[0067] Figure 5 This is a cross-sectional structural diagram of the connecting rod according to an embodiment of the present invention.

[0068] Figure 6 This is a cross-sectional structural diagram of the hammer core top cover according to an embodiment of the present invention.

[0069] Figure 7 This is a cross-sectional structural diagram of the guide sleeve in an embodiment of the present invention.

[0070] Figure 8 This is a cross-sectional structural diagram of the guide sleeve in an embodiment of the present invention.

[0071] Figure 9 This is a three-dimensional structural diagram of the first tooling frame according to an embodiment of the present invention.

[0072] Figure 10 This is a three-dimensional structural diagram of the second tooling frame according to an embodiment of the present invention.

[0073] Figure 11 This is a three-dimensional structural diagram of the ball head seat according to an embodiment of the present invention.

[0074] Figure 12 This is a cross-sectional view of the lower buffer disc spring of the disc spring hammer core buffer device according to an embodiment of the present invention, showing its installation state. Figure 1 .

[0075] Figure 13 This is a cross-sectional view of the lower buffer disc spring of the disc spring hammer core buffer device according to an embodiment of the present invention, showing its installation state. Figure 2 .

[0076] Figure 14 This is a cross-sectional view of the lower buffer disc spring of the disc spring hammer core buffer device according to an embodiment of the present invention, showing its installation state. Figure 3 .

[0077] Figure 15 This is a cross-sectional view of the upper buffer disc spring of the disc spring hammer core buffer device according to an embodiment of the present invention, showing its installation state. Figure 1 .

[0078] Figure 16 This is a cross-sectional view of the upper buffer disc spring of the disc spring hammer core buffer device according to an embodiment of the present invention, showing its installation state. Figure 2 .

[0079] Figure 17 This is a cross-sectional view of the upper buffer disc spring of the disc spring hammer core buffer device according to an embodiment of the present invention, showing its installation state. Figure 3 .

[0080] Explanation of reference numerals in the attached figures:

[0081] 10. Lower flange; 11. Flange body; 111. Flange through hole; 112. Flange threaded hole; 12. Flange boss; 121. Flange guide cavity; 122. Flange connection external thread; 123. Flange disc spring support surface; 20. Connecting cylinder; 21. Annular boss; 211. Guide hole; 22. Upper connection internal thread; 23. Lower connection internal thread; 24. Wrench locking hole; 30. Connecting rod; 31. Connecting rod; 32. Pre-loaded... Tightening pull head, 321. Pull threaded hole, 33. Ball head, 40. Hammer core top cover, 41. Top cover body, 411. Top cover bolt hole, 42. Top cover boss, 421. Top cover connecting external thread, 422. Top cover disc spring support surface, 43. Top cover through hole, 431. Top cover guide cavity, 51. Upper guide sleeve, 511. Upper guide pressing support surface, 512. Upper guide cylinder, 513. Upper guide pre-tightening boss, 52. Lower guide sleeve 521. Lower guide pressure support surface; 522. Lower guide cylinder; 523. Lower guide preload boss; 53. Upper buffer disc spring; 54. Lower buffer disc spring; 60. First tooling frame; 61. First top plate; 611. First through hole; 612. Second bolt hole; 62. First bottom plate; 63. First support column; 70. Second tooling frame; 71. Second top plate; 711. Second through hole; 712. Third bolt hole; 72. Second base plate, 721, first screw hole, 73, second support column, 81, ball head seat, 811, first bolt hole, 812, first connecting bolt, 813, first half of ball head surround, 814, second half of ball head surround, 815, surround connecting bolt, 816, surround nut, 82, double-ended screw, 821, first nut, 83, second connecting bolt, 84, third connecting bolt, 841, second nut. Detailed Implementation

[0082] The embodiments of the present invention will be described in detail below.

[0083] The disc-shaped spring hammer core buffer device, its installation method, and disassembly method provided by this invention can be specifically applied to large hydraulic pile hammers and hydraulic mining hammers to improve the overall performance of such large equipment. Large hydraulic pile hammers using the disc-shaped spring hammer core buffer device of this invention have the following advantages: Environmentally friendly: low noise and no pollution, completely reducing the impact on the surrounding environment during construction; Highly efficient and energy-saving, with strong buffering and vibration absorption capacity, able to withstand large loads with very small deformation, resulting in high pile quality; Capable of constructing pipe piles, square piles, I-beam piles, and steel casing piles; Widely used in pile foundation construction for buildings, bridges, docks, and marine engineering projects.

[0084] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0085] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0086] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0087] Example 1:

[0088] See Figures 1 to 17 As shown in the figure, the installation method of the disc spring hammer core buffer device provided in this embodiment includes a lower flange 10, a connecting cylinder 20, a connecting rod 30, a hammer core top cover 40, an upper guide sleeve 51, a lower guide sleeve 52, an upper buffer disc spring 53, and a lower buffer disc spring 54 (see...). Figures 1 to 8 The lower flange 10 includes a flange body 11 and an annular flange boss 12. The inner ring of the flange boss 12 forms a flange guide cavity 121. The flange body 11 has a flange through hole 111 communicating with the flange guide cavity 121 in the middle. The outer side of the flange boss 12 has a flange connection external thread 122. The hammer core top cover 40 includes a top cover body 41 and an annular top cover boss 42. The hammer core top cover 40 has a top cover through hole 43 in the middle. The lower edge of the top cover through hole 43 has a top cover guide cavity 431. The outer side of the top cover boss 42 has a top cover connection external thread 421. In the connecting cylinder 2 An annular boss 21 is provided in the middle of the inner wall of the 0. A guide hole 211 is formed on the inner side of the annular boss 21. The inner edges of the upper and lower ends of the connecting cylinder 20 are respectively provided with an upper connecting internal thread 22 and a lower connecting internal thread 23. The connecting rod 30 includes a connecting rod 31, a pre-tightening pull head 32, and a ball head 33. The ball head 33 and the pre-tightening pull head 32 are respectively connected to the upper and lower ends of the connecting rod 31. A pull thread hole 321 is provided in the middle of the bottom surface of the pre-tightening pull head 32. The lower guide sleeve 52 has a lower guide pressure support surface 521, and the upper guide sleeve 51 has an upper guide pressure support surface 511. The installation method includes the following steps:

[0089] S1. Install an auxiliary mounting bracket (see...) Figures 9 to 11 The installation auxiliary support includes a first tooling frame 60, a double-ended screw 82, a second tooling frame 70, and a ball head seat 81. The first tooling frame 60 includes a first top plate 61, a first bottom plate 62, and four first support columns 63. The upper ends of the four first support columns 63 are connected to the four corners of the bottom surface of the first top plate 61, and the lower ends of the four first support columns 63 are connected to the top surface of the first bottom plate 62. The first top plate 61 has a first through hole 611 in the middle. The second tooling frame 70 includes a second top plate 71, a second bottom plate 72, and four second support columns 73. The upper ends of the four second support columns 73 are connected to the four corners of the bottom surface of the second top plate 71, and the lower ends of the four second support columns 73 are connected to the top surface of the second bottom plate 72. The second top plate 71 has a second through hole 711 in the middle, and the second bottom plate 72 has multiple first screw holes 721 in the middle of the top surface. The ball head seat 81 has multiple first bolt holes 811.

[0090] S2. First, fix the first tooling frame 60 on a flat ground, and fix the lower flange 10 on the top surface of the first top plate 61. Then, sequentially fit the lower buffer disc spring 54, the lower guide sleeve 52, and the connecting cylinder 20 onto the lower flange 10. Next, rotate the connecting cylinder 20 downwards so that the lower connecting internal thread 23 of the connecting cylinder 20 engages with the flange connecting external thread 122 of the lower flange 10. When the connecting cylinder 20 cannot be easily rotated, it indicates that the lower guide pressure support surface 521 of the lower guide sleeve 52 and the lower buffer disc spring 54 are tightly attached. At this time, the gap between the bottom surface of the lower guide sleeve 52 and the bottom of the flange guide cavity 121 is H2, and the gap between the lower end face of the connecting cylinder 20 and the circumferential edge of the top surface of the flange body 11 is H1, where H1 is less than H2 (see [reference]). Figure 12 );

[0091] S3. The connecting rod 30 is first inserted into the guide hole 211 of the connecting cylinder 20 from top to bottom using the pre-tightening pull head 32. Then, the upper end of the double-ended screw 82 is passed through the first through hole 611, the flange through hole 111, the lower guide sleeve 52 and connected to the pull thread hole 321 on the bottom surface of the pre-tightening pull head 32 from bottom to top, so that the bottom surface of the pre-tightening pull head 32 fits against the top surface of the lower guide sleeve 52. The first nut 821 is then threadedly connected to the lower end of the double-ended screw 82.

[0092] S4. Continue to tighten the first nut 821 at the lower end of the double-ended screw 82 with a wrench. Use the double-ended screw 82 to pull the connecting rod 30 downwards. The bottom surface of the pre-tightening pull head 32 presses against the top surface of the lower guide sleeve 52 and moves downwards together. This causes the lower guide sleeve 52's lower guide abutment support surface 521 to compress the lower buffer disc spring 54 until the compression stroke gap H2 disappears. At this time, the connecting cylinder 20 will no longer be subject to the force of the lower buffer disc spring 54. Then, rotate the connecting cylinder 20 downwards until the end face of the lower end of the connecting cylinder 20 is tightly fitted with the circumferential edge of the top surface of the flange body 11 (see...). Figure 13 Next, slowly loosen the first nut 821 at the lower end of the double-ended screw 82, allowing the bottom surface of the lower guide sleeve 52 to return to the gap of H2-H1 between the bottom surface of the lower guide sleeve 52 and the bottom of the flange guide cavity 121 under the spring force of the lower buffer disc spring 54 (see...). Figure 14 Then, the double-headed screw 82 and the first nut 821 at its lower end are removed; at this point, the lower mechanism in the disc spring hammer core buffer device is installed.

[0093] S5. Fix the second tooling frame 70 on a flat ground and fix the hammer core top cover 40 on the top surface of the second top plate 71. Then, put the upper buffer disc spring 53 and the upper guide sleeve 51 on the hammer core top cover 40 in sequence. Then, flip the lower mechanism of the disc spring hammer core buffer device and use the upper end of the connecting rod 30 to pass through the upper guide sleeve 51, the top cover through hole 43 and the second through hole 711 from top to bottom. The connecting tube of the lower mechanism is then put on the outside of the upper buffer disc spring 53.

[0094] S6. Rotate the connecting cylinder 20 of the lower mechanism downwards, so that the upper connecting internal thread 22 of the connecting cylinder 20 engages with the top cover connecting external thread 421 of the hammer core top cover 40. When the connecting cylinder 20 of the lower mechanism cannot be rotated easily, it indicates that the upper guide abutment support surface 511 of the upper guide sleeve 51 and the upper buffer disc spring 53 are tightly attached. At this time, the gap between the top surface of the upper guide sleeve 51 and the bottom of the top cover guide cavity 431 is H4, and the gap between the upper end face of the connecting cylinder 20 and the circumferential edge of the bottom surface of the top cover body 41 is H4. The gap is H3, where H3 is less than H4; due to the action of the lower buffer disc spring 54, the circumferential edge of the top surface of the pre-tightening pull head 32 is pressed against the bottom surface of the upper guide sleeve 51; then, the ball head seat 81 is wrapped around the ball head 33 at the upper end of the connecting rod 30, and the first connecting bolt 812 is threaded from top to bottom through the first bolt hole 811 of the ball head seat 81 and threaded into the first screw hole 721 on the second base plate 72, ensuring that the distance between the bottom surface of the ball head seat 81 and the top surface of the second base plate 72 is H5; where H5 is greater than H4 (see Figure 15 );

[0095] S7. Continue to tighten the first connecting bolt 812 with a wrench, pull down the ball head 33 of the connecting rod 30 wrapped with the ball head seat 81, and at the same time use the connecting rod 30 to press the circumferential edge of the top surface of the pre-tightening pull head 32 against the bottom surface of the upper guide sleeve 51 and move them downward together, so that the upper guide sleeve 51's upper guide abutment support surface 511 compresses the upper buffer disc spring 53 until the compression stroke gap H4 disappears. At this time, the connecting cylinder 20 of the lower mechanism will not be subject to the force of the upper buffer disc spring 53. Then, rotate the connecting cylinder 20 of the lower mechanism downward until the top surface of the connecting cylinder 20 of the lower mechanism is tightly fitted with the circumferential edge of the bottom surface of the top cover body 41 until the gap H3 disappears (see Figure 16 Next, slowly loosen the first connecting bolt 812. Under the spring force of the upper buffer disc spring 53, the top surface of the upper guide sleeve 51 and the bottom of the guide cavity 431 of the top cover return to the gap H4-H3 (see...). Figure 17 Then remove the ball head seat 81; at this point, the disc spring hammer core buffer device is installed.

[0096] The present invention also provides a disc spring hammer core buffer device using the above-described installation method, comprising a lower flange 10, a connecting cylinder 20, a connecting rod 30, a hammer core top cover 40, an upper guide sleeve 51, a lower guide sleeve 52, an upper buffer disc spring 53, and a lower buffer disc spring 54. The lower flange 10 includes a flange body 11 and an annular flange boss 12, the inner ring of which forms a flange guide cavity 121. The hammer core top cover 40 includes a top cover body 41 and an annular top cover boss 42. A top cover through hole 43 is provided in the middle of the hammer core top cover 40, and a top cover guide cavity 431 is provided on the lower edge of the top cover through hole 43. The hammer core top cover 40 and the lower flange 10 are respectively connected to the upper and lower ends of the connecting cylinder 20; the upper guide sleeve 51 and the lower guide sleeve 52... The upper and lower disc springs are respectively inserted into the top cover guide cavity 431 and the flange guide cavity 121, and respectively form an upper disc spring cavity and a lower disc spring cavity with the inner side wall of the connecting cylinder 20. The upper buffer disc spring 53 and the lower buffer disc spring 54 are respectively installed in the upper disc spring cavity and the lower disc spring cavity. The connecting rod 30 includes a connecting rod 31 and a pre-tightening pull head 32. The pre-tightening pull head 32 is connected to the lower end of the connecting rod 31. The connecting rod 30 is installed between the upper guide sleeve 51 and the lower guide sleeve 52 through the pre-tightening pull head 32. The upper end of the connecting rod 30 passes through the upper guide sleeve 51 and the top cover through hole 43 from bottom to top. The top surface of the pre-tightening pull head 32 abuts against the lower end surface of the upper guide sleeve 51, and the bottom surface of the pre-tightening pull head 32 abuts against the upper end surface of the lower guide sleeve 52.

[0097] Traditional threaded connection installations typically involve forceful tightening. Since the disc spring hammer core buffer device contains a disc spring, and this disc spring requires pre-tensioning (partial compression), the spring's rebound force acts on the threaded connection. Forceful tightening not only makes installation difficult but can also burn out the threads. This invention, however, takes the opposite approach. Its disc spring hammer core buffer device installation method is exactly the opposite of the traditional method. The installation method first releases the spring's rebound force to prevent thread burnout, and then tightens the threaded connection, thus easily installing the buffer device's threaded connection.

[0098] This embodiment, through scientific structural design and the coordination of multiple steps, separates the buffer mechanism from the hammer core in existing hydraulic pile hammers. Using an auxiliary mounting bracket, the disc spring requiring preload is first installed in an independent buffer device. Then, the buffer device with the disc spring installed is fixed as a whole to the top of the hammer core using several bolts. This buffers the vibration generated by the hydraulic hammer body acting on the target object, making the installation and disassembly of the disc spring more convenient. The disc spring hammer core buffer device includes a lower flange 10, a connecting cylinder 20, a connecting rod 30, and the top of the hammer core. The buffer device consists of a cover 40, an upper guide sleeve 51, a lower guide sleeve 52, an upper buffer disc spring 53, and a lower buffer disc spring 54. During installation or disassembly, an auxiliary installation bracket is provided, comprising a first tooling frame 60, a double-ended screw 82, a second tooling frame 70, and a ball joint seat 81. During installation, first, the first tooling frame 60 is fixed to a flat surface. Then, the lower flange 10 is fixed to the top surface of the first top plate 61. Next, the lower buffer disc spring 54, the lower guide sleeve 52, and the connecting sleeve 20 are sequentially fitted onto the lower flange 10. Finally, the connecting sleeve 20 is... The first rotation downwards causes the connecting cylinder 20 to engage with the lower flange 10. When the connecting cylinder 20 can no longer rotate easily, it indicates that the lower guide sleeve 52's lower guide bearing surface 521 is in close contact with the lower buffer disc spring 54. It also indicates that the bottom surface of the annular boss 21 of the connecting cylinder 20 is in close contact with the lower buffer disc spring 54, and the lower buffer disc spring 54 initially provides rebound support to the annular boss 21 of the connecting cylinder 20. At this time, the gap between the bottom surface of the lower guide sleeve 52 and the bottom of the flange guide cavity 121 is H2, which is the total clearance of the lower buffer disc spring 54. The compression amount is H1, and the gap between the lower end face of the connecting cylinder 20 and the circumferential edge of the top surface of the flange body 11 is less than H2. H1 is the pre-compression amount of the lower buffer disc spring 54. The rebound force generated by the pre-compression amount H1 is the pre-tightening force that the lower buffer disc spring 54 needs to be applied, thereby realizing precise control of the amount of pre-tightening force applied to the lower buffer disc spring 54. During the design, by adjusting the height of H1, the amount of pre-tightening force applied to the lower buffer disc spring 54 can be controlled to ensure the buffering and vibration absorption capacity of the buffer device and improve the safety and stability of the device.

[0099] Next, insert the pre-tightening pull head 32 into the guide hole 211, and then connect the double-ended screw 82 from below to the pull threaded hole 321 of the connecting rod 30. The connecting rod 30 pulls the lower guide sleeve 52 downwards to compress the lower buffer disc spring 54 until the compression stroke gap H2 disappears. The lower guide sleeve 52 compresses and pre-tightens the lower buffer disc spring 54 from the inside, pre-releasing the spring's rebound force. At this point, the connecting cylinder 20 will not be subject to the force of the lower buffer disc spring 54. Then, the connecting cylinder 20... The second rotation moves downward until the end face of the lower end of the connecting cylinder 20 is tightly fitted with the circumferential edge of the top surface of the flange body 11; then the downward pull on the connecting rod 30 is released, allowing the lower guide sleeve 52 to return to the gap of H2-H1 between the bottom surface of the lower guide sleeve 52 and the bottom of the flange guide cavity 121 under the spring force of the lower buffer disc spring 54. At this time, the lower buffer disc spring 54 has completed the pre-compression of H1, and the lower mechanism in the disc spring hammer core buffer device is now installed.

[0100] The second tooling frame 70 is fixed on a flat ground, and the hammer core top cover 40 is fixed on the top surface of the second top plate 71. Then, the upper buffer disc spring 53 and the upper guide sleeve 51 are sequentially placed on the hammer core top cover 40. Then, the lower mechanism in the disc spring hammer core buffer device is flipped and sequentially passed through the upper guide sleeve 51, the top cover through hole 43, and the second through hole 711. Next, the connecting cylinder 20 is rotated downward for the third time, so that the connecting cylinder 20 and the hammer core top cover 40 are screwed together. When the connecting cylinder 20 of the lower mechanism cannot be rotated easily, it indicates that the upper guide pressure support surface 511 of the upper guide sleeve 51 is in close contact with the upper buffer disc spring 53. It also indicates that the top surface of the annular boss 21 of the connecting cylinder 20 is in close contact with the upper buffer disc spring 53. Initially, the top surface of the annular protrusion 21 is rebounded and supported. At this time, the gap between the top surface of the upper guide sleeve 51 and the bottom of the guide cavity 431 of the top cover is H4, which is the total compression of the upper buffer disc spring 53. The gap between the end face of the upper end of the connecting cylinder 20 and the circumferential edge of the bottom surface of the top cover body 41 is H3, where H3 is less than H4. H3 is the pre-compression of the upper buffer disc spring 53. The rebound force generated by the pre-compression H3 is the pre-tightening force that the upper buffer disc spring 53 needs to be applied, thereby realizing precise control of the amount of pre-tightening force applied to the upper buffer disc spring 53. During the design, by adjusting the height of H3, the amount of pre-tightening force applied to the upper buffer disc spring 53 can be controlled to ensure the buffering and vibration absorption capacity of the buffer device and improve the safety and stability of the device.

[0101] Next, the ball head seat 81 pulls down the connecting rod 30, causing the upper guide sleeve 51's upper guide abutment support surface 511 to compress the upper buffer disc spring 53 until the compression stroke gap H4 disappears. The lower guide sleeve 52 compresses and pre-tightens the upper buffer disc spring 53 from the inside, pre-releasing the spring's rebound force. At this time, the connecting cylinder 20 will not be subject to the force of the upper buffer disc spring 53. Then, the connecting cylinder 20 is rotated and moved downward for the fourth time until the top surface of the connecting cylinder 20 of the lower mechanism is tightly fitted with the circumferential edge of the bottom surface of the top cover body 41 until the gap H3 disappears. Then, the downward pull force of the ball head seat 81 on the connecting rod 30 is released, allowing the upper guide sleeve 51, under the spring force of the upper buffer disc spring 53, to restore the gap H4-H3 between the top surface of the upper guide sleeve 51 and the bottom of the top cover guide cavity 431. At this time, the upper buffer disc spring 53 has completed the pre-compression amount of H3. Thus, the disc spring hammer core buffer device is installed.

[0102] The disc spring hammer core buffer device is separated from the hammer core of the hydraulic pile hammer as a whole. First, the disc spring that needs to be preloaded is installed in the independent buffer device. Then, the buffer device with the disc spring installed is combined with the hammer body of the hammer core to form the hammer core of the hydraulic pile hammer, making the installation and disassembly of the disc spring more convenient. The installation and disassembly method of the buffer device is to set an upper guide sleeve 51 and a lower guide sleeve 52 on the inside of the disc spring. The upper guide sleeve 51 and the lower guide sleeve 52 are used to compress and preload the disc spring from the inside, so that the rebound force of the disc spring can be released in advance when the buffer device is installed and disassembled. This avoids the connection threads from burning due to the rebound force of the disc spring during the installation and disassembly of the buffer device. This makes the installation and disassembly of the disc spring hammer core buffer mechanism more convenient and improves the installation and disassembly efficiency. In addition, it can also achieve precise control of the amount of preload applied, ensuring the buffering and vibration absorption capacity of the buffer device, improving the buffering and vibration absorption effect of the buffer device, and improving the safety and stability of the device.

[0103] The present invention also provides a first method for disassembling a disc spring hammer core buffer device, comprising the following steps:

[0104] S81. A disc-shaped spring hammer core buffer device is provided, which is a device that has been installed after the above installation method has been implemented.

[0105] S82. Fix the second tooling frame 70 on a flat ground, flip the disc spring hammer core buffer device, insert the upper end of the connecting rod 30 into the second through hole 711 of the second top plate 71 from top to bottom, and fix the hammer core top cover 40 of the disc spring hammer core buffer device on the top surface of the second top plate 71.

[0106] S83. Using the ball head seat 81 to wrap around the ball head 33 at the upper end of the connecting rod 30, the first connecting bolt 812 passes from top to bottom through the first bolt hole 811 of the ball head seat 81 and is pre-connected to the first screw hole 721 on the second base plate 72. Continue to tighten the first connecting bolt 812 with a wrench, pulling the ball head 33 of the connecting rod 30 wrapped by the ball head seat 81 downwards. Simultaneously, the connecting rod 30 presses the circumferential edge of the top surface of the pre-tightening pull head 32 against the bottom surface of the upper guide sleeve 51, causing them to move downwards together. This results in the upper guide sleeve 51 pressing against the support surface 511. Retract the upper buffer disc spring 53 until the upper end face of the upper guide sleeve 51 abuts against the bottom of the guide cavity 431 of the top cover. At this time, the connecting cylinder 20 will not be subject to the force of the upper buffer disc spring 53. Then, rotate the connecting cylinder 20 upward until the upper end of the connecting cylinder 20 is disengaged from the hammer core top cover 40. Then remove the first connecting bolt 812 and the ball head seat 81. At this point, the hammer core top cover 40, the upper buffer disc spring 53, and the upper guide sleeve 51 have been completely disassembled from the disc spring hammer core buffer device, forming the lower mechanism of the disc spring hammer core buffer device.

[0107] S84. Fix the first tooling frame 60 on a flat ground, take out the lower mechanism of the disc spring hammer core buffer device from the second tooling frame 70, and flip it over. Fix the lower flange 10 in the lower mechanism of the disc spring hammer core buffer device to the top surface of the first top plate 61. Pass the upper end of the double-ended screw 82 from bottom to top through the first through hole 611, the flange through hole 111, the lower guide sleeve 52 and connect it to the pull thread hole 321 on the bottom surface of the pre-tightening pull head 32. Connect the lower end of the double-ended screw 82 with the first nut 821.

[0108] S85. Continue to tighten the first nut 821 at the lower end of the double-ended screw 82 with a wrench. Use the double-ended screw 82 to pull the connecting rod 30 downward. The bottom surface of the pre-tightening pull head 32 presses against the top surface of the lower guide sleeve 52 and moves downward together. This causes the lower guide sleeve 52's lower guide abutment support surface 521 to compress the lower buffer disc spring 54 until the lower end face of the lower guide sleeve 52 abuts against the bottom of the flange guide cavity 121. At this time, the connecting cylinder 20 will not be subject to the force of the lower buffer disc spring 54. Then, rotate the connecting cylinder 20 upward until the lower end of the connecting cylinder 20 is disengaged from the lower flange 10. Then, remove the first nut 821 and the double-ended screw 82. At this point, the disc spring hammer core buffer device has been completely disassembled.

[0109] Traditional threaded connection disassembly involves forceful reverse twisting. Because the disc spring hammer core buffer device contains disc springs, and these disc springs are pre-loaded (i.e., in a semi-compressed state), the threaded connection between the lower flange 10 or hammer core top cover 40 and the connecting cylinder 20 is under tension due to the springs' rebound force. Using forceful reverse twisting to disassemble the threaded connection is not only difficult but can also burn out the threads. The disassembly method of the disc spring hammer core buffer device of this invention is the opposite of the traditional method. This invention first releases the springs' rebound force and then twists the connecting cylinder 20 in the reverse direction, thereby easily disassembling the threaded connection between the lower flange 10 or hammer core top cover 40 and the connecting cylinder 20. The disassembly method of this invention also requires the use of an installation auxiliary bracket. First, the second tooling frame 70 is fixed on a flat ground. Then, the pre-installed buffer device is flipped over, and the connecting rod 30 is inserted into the second through hole 711 of the second top plate 71 to fix the hammer core top cover 40 to the top surface of the second top plate 71. Then, the ball head seat 81 is used to pull the connecting rod 30 downward, so that the upper guide sleeve 51 presses against the support surface 511 to compress the upper buffer disc spring 53, thereby releasing the preload of the upper buffer disc spring 53 and thus releasing the force of the upper buffer disc spring 53 on the connecting cylinder 20. Next, the connecting cylinder 20 is rotated upward until the connecting cylinder 20 is disengaged from the hammer core top cover 40. Since the preload of the upper buffer disc spring 53 has been released before rotating the connecting cylinder 20 to disengage from the hammer core top cover 40, the disassembly of the hammer core top cover 40 is very convenient and labor-saving. This avoids the connecting threads from burning out during disassembly, thus improving disassembly efficiency. After the upper buffer disc spring 53 is disassembled, it is flipped over again, and the lower flange 10 of the lower mechanism of the disc spring hammer core buffer device is fixed on the first top plate 61 of the first tooling frame 60. On the same principle, the double-ended screw 82 is used to pull the connecting rod 30 downward, so that the lower guide sleeve 52's lower guide abutment support surface 521 compresses the lower buffer disc spring 54, thereby releasing the preload of the lower buffer disc spring 54, and thus releasing the force of the lower buffer disc spring 54 on the connecting cylinder 20. Then, the connecting cylinder 20 is rotated upward until the connecting cylinder 20 is disconnected from the lower flange 10. Since the preload of the lower buffer disc spring 54 has been released before rotating the connecting cylinder 20 to disconnect from the lower flange 10, the disassembly of the lower flange 10 is very convenient and labor-saving, and the connecting threads are prevented from burning out during disassembly, thus improving disassembly efficiency.

[0110] The present invention also provides a second method for disassembling the disc spring hammer core buffer device, comprising the following steps:

[0111] S91. A disc-shaped spring hammer core buffer device is provided, wherein the disc-shaped spring hammer core buffer device is a device that has been installed after the above installation method has been implemented.

[0112] S92. Fix the first tooling frame 60 on a flat ground, fix the lower flange 10 in the disc spring hammer core buffer device to the top surface of the first top plate 61, and connect the upper end of the double-ended screw 82 from bottom to top through the first through hole 611, the flange through hole 111, the lower guide sleeve 52 to the pull thread hole 321 on the bottom surface of the pre-tightening pull head 32, and connect the lower end of the double-ended screw 82 with the first nut 821.

[0113] S93. Continue to tighten the first nut 821 at the lower end of the double-ended screw 82 with a wrench. Use the double-ended screw 82 to pull the connecting rod 30 downward. The bottom surface of the pre-tightening pull head 32 presses against the top surface of the lower guide sleeve 52 and moves downward together. This causes the lower guide sleeve 52's lower guide abutment support surface 521 to compress the lower buffer disc spring 54 until the lower end face of the lower guide sleeve 52 abuts against the bottom of the flange guide cavity 121. At this time, the connecting cylinder 20 will not be subject to the force of the lower buffer disc spring 54. Then, rotate the connecting cylinder 20 upward until the lower end of the connecting cylinder 20 is disengaged from the lower flange 10. Then, remove the first nut 821 and the double-ended screw 82. At this point, the lower flange 10, the lower buffer disc spring 54, and the lower guide sleeve 52 have been completely disassembled from the disc spring hammer core buffer device, forming the upper mechanism of the disc spring hammer core buffer device.

[0114] S94. Fix the second tooling frame 70 on a flat ground, take out the upper mechanism of the disc spring hammer core buffer device from the first tooling frame 60, flip it over, and use the upper end of the connecting rod 30 to insert it into the second through hole 711 of the second top plate 71 from top to bottom, and fix the hammer core top cover 40 of the disc spring hammer core buffer device on the top surface of the second top plate 71.

[0115] S95. Using the ball head seat 81 to wrap around the ball head 33 at the upper end of the connecting rod 30, the first connecting bolt 812 passes from top to bottom through the first bolt hole 811 of the ball head seat 81 and is pre-connected to the first screw hole 721 on the second base plate 72. Continue to tighten the first connecting bolt 812 with a wrench, pull the ball head 33 of the connecting rod 30 wrapped by the ball head seat 81 downward, and at the same time use the connecting rod 30 to press the circumferential edge of the top surface of the pre-tightening pull head 32 against the bottom surface of the upper guide sleeve 51 and move them downward together. This causes the upper guide sleeve 51's upper guide pressure support surface 511 to compress the upper buffer disc spring 53 until the upper end face of the upper guide sleeve 51 abuts against the bottom of the top cover guide cavity 431. At this time, the connecting cylinder 20 will not be subject to the force of the upper buffer disc spring 53. Then, the connecting cylinder 20 is rotated and moved upward until the upper end of the connecting cylinder 20 is disengaged from the hammer core top cover 40. Then, the first connecting bolt 812 and the ball head seat 81 are removed. At this point, the disc spring hammer core buffer device is completely disassembled.

[0116] The second method for disassembling the disc spring hammer core buffer device provided by this invention is based on the same principle as the first method. The difference is that the first method first disconnects the threaded connection between the connecting cylinder 20 and the hammer core top cover 40, and then disconnects the threaded connection between the connecting cylinder 20 and the lower flange 10; while the second method first disconnects the threaded connection between the connecting cylinder 20 and the lower flange 10, and then disconnects the threaded connection between the connecting cylinder 20 and the hammer core top cover 40. The principles of the two methods are the same, but the order is reversed.

[0117] Example 2:

[0118] The disc spring hammer core buffer device and its installation and disassembly methods provided in Embodiment 2 of the present invention are basically the same as those in Embodiment 1, except that: the bottom surface of the flange body 11 of the disc spring hammer core buffer device is provided with a plurality of flange threaded holes 112, which are evenly distributed around the flange through hole 111; the first top plate 61 of the first tooling frame 60 is also provided with a plurality of second bolt holes 612, which are evenly distributed around the first through hole 611; step S2 further includes the following steps:

[0119] S21. First, place the lower flange 10 on the top surface of the first top plate 61. Then, use the second connecting bolt 83 to thread it from bottom to top through the second bolt hole 612 and connect it to the flange thread hole 112, thereby fixing the lower flange 10 on the top surface of the first top plate 61.

[0120] The flange threaded hole 112 is provided to facilitate fixing the lower flange 10 to the top surface of the first top plate 61 of the first tooling 60, thus facilitating the fixed installation of the lower flange 10.

[0121] Example 3:

[0122] The disc spring hammer core buffer device and its installation and disassembly methods provided in Embodiment 3 of the present invention are basically the same as those in Embodiment 2, except that: the top surface of the flange boss 12 of the disc spring hammer core buffer device forms a flange disc spring support surface 123, the lower guide sleeve 52 includes a lower guide cylinder 522 and an annular lower guide pre-tightening boss 523, the lower guide pre-tightening boss 523 is installed on the upper end of the outer side of the lower guide cylinder 522, and the bottom surface of the lower guide pre-tightening boss 523 forms a lower guide pressing support surface 521; step S2 also includes the following steps:

[0123] S22. First, place the lower buffer disc spring 54 on the flange disc spring support surface 123, then insert the lower guide sleeve 52 into the flange guide cavity 121, so that the lower buffer disc spring 54 is supported on the lower guide pressure support surface 521. Next, put the connecting cylinder 20 on the outer side of the lower buffer disc spring 54, so that the lower buffer disc spring 54, the lower guide sleeve 52, and the connecting cylinder 20 are successively put on the lower flange 10.

[0124] The lower guide sleeve 52 of the present invention includes a lower guide cylinder 522 and a lower guide preload boss 523, and a lower guide pressing support surface 521 is formed on the bottom surface of the lower guide preload boss 523. The lower guide pressing support surface 521 and the flange disc spring support surface 123 on the top surface of the flange boss 12 respectively form the upper and lower support surfaces of the lower buffer disc spring 54, which facilitates the compression control of the lower buffer disc spring 54, thereby realizing the control of the amount of preload applied to the lower buffer disc spring 54.

[0125] Example 4:

[0126] The disc spring hammer core buffer device and its installation and disassembly methods provided in Embodiment 4 of the present invention are basically the same as those in Embodiment 1, except that: the top cover body 41 of the disc spring hammer core buffer device has a plurality of top cover bolt holes 411 on its circumferential edge, and the plurality of top cover bolt holes 411 are evenly distributed around the top cover through hole 43; the second top plate 71 also has a plurality of third bolt holes 712, and the plurality of third bolt holes 712 are evenly distributed around the second through hole 711; step S5 further includes the following steps:

[0127] S51. First, place the hammer core top cover 40 on the top surface of the second top plate 71. Then, through the third connecting bolt 84 from top to bottom, pass through the top cover bolt hole 411 and the third bolt hole 712 to connect with the second nut 841. Tighten the second nut 841 with a wrench to fix the hammer core top cover 40 on the top surface of the second top plate 71.

[0128] The top cover bolt holes 411 are provided, and multiple third bolt holes 712 are provided on the second top plate 71 of the second tooling frame 70 to facilitate the fixed installation of the hammer core top cover 40.

[0129] Example 5:

[0130] The disc spring hammer core buffer device and its installation and disassembly methods provided in Embodiment 5 of the present invention are basically the same as those in Embodiment 4, except that: the top surface of the top cover boss 42 of the disc spring hammer core buffer device forms a top cover disc spring support surface 422; the upper guide sleeve 51 includes an upper guide cylinder 512 and an annular upper guide pre-tightening boss 513; the upper guide pre-tightening boss 513 is installed at the lower end of the outer side of the upper guide cylinder 512; the top surface of the upper guide pre-tightening boss 513 forms an upper guide pressing support surface 511; step S2 further includes the following steps:

[0131] S52. First, place the upper buffer disc spring 53 on the top cover disc spring support surface 422, then insert the upper guide sleeve 51 into the top cover guide cavity 431, so that the upper buffer disc spring 53 is supported on the upper guide pressing support surface 511, thereby so that the upper buffer disc spring 53 and the upper guide sleeve 51 are successively fitted onto the hammer core top cover 40.

[0132] The upper guide sleeve 51 of the present invention includes an upper guide cylinder 512 and an upper guide pre-tightening boss 513, and an upper guide pressing support surface 511 is formed on the top surface of the upper guide pre-tightening boss 513. The upper guide pressing support surface 511 and the top cover disc spring support surface 422 on the top surface of the top cover boss 42 respectively form the upper and lower support surfaces of the upper buffer disc spring 53, which facilitates the compression control of the upper buffer disc spring 53, thereby realizing the control of the amount of pre-tightening force applied to the upper buffer disc spring 53.

[0133] Example 6:

[0134] The disc spring hammer core buffer device and its installation and disassembly methods provided in Embodiment 6 of the present invention are basically the same as those in Embodiment 1, except that: the outer side of the connecting cylinder 20 of the disc spring hammer core buffer device is provided with multiple wrench locking holes 24. A special wrench is inserted into the wrench locking hole, and the connecting cylinder 20 is rotated downward using the special wrench. The wrench locking hole facilitates the rotation drive of the connecting cylinder 20.

[0135] Example 7:

[0136] The disc spring hammer core buffer device and its installation and disassembly methods provided in Embodiment 7 of the present invention are basically the same as those in Embodiment 1, except that: the ball head seat 81 of the disc spring hammer core buffer device includes a first half ball head surround 813, a second half ball head surround 814, a plurality of surround connecting bolts 815, and a plurality of surround nuts 816. The first half ball head surround 813 has a plurality of first surround bolt holes on both sides, and the second half ball head surround 814 has a plurality of second surround bolt holes on both sides. Step S6 further includes the following steps:

[0137] S61. The first half of the ball head surround 813 and the second half of the ball head surround 814 are respectively wrapped around the left and right sides of the ball head 33. The surround connecting bolt 815 passes through the first surround bolt hole and the second surround bolt hole in sequence and is threaded to the surround nut 816, so that the ball head seat 81 is wrapped around the ball head 33 at the upper end of the connecting rod 30.

[0138] The present invention designs the ball head seat 81 as two half-surrounding parts to facilitate the wrapping and connection of the ball head 33 of the connecting rod 30.

[0139] The hydraulic pile driver equipment of the same model as the present invention has strong buffering and vibration absorption capacity, and can withstand large loads with very small deformation. Moreover, it can avoid the connection threads of the hammer core buffer mechanism from burning out due to the rebound force of the disc spring during installation and disassembly, making the installation and disassembly of the disc spring hammer core buffer device more convenient, improving installation and disassembly efficiency, saving manpower and material resources, and significantly reducing the equipment failure rate and extending the equipment life.

[0140] The above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention; any substitutions and improvements made without departing from the concept of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A method for installing a disc-shaped spring hammer core buffer device, characterized in that, The disc spring hammer core buffer device includes a lower flange, a connecting cylinder, a connecting rod, a hammer core top cover, an upper guide sleeve, a lower guide sleeve, an upper buffer disc spring, and a lower buffer disc spring. The lower flange includes a flange body and an annular flange boss. The inner ring of the flange boss forms a flange guide cavity. The flange body has a flange through hole communicating with the flange guide cavity in the middle. The outer side of the flange boss has a flange connection external thread. The hammer core top cover includes a top cover body and an annular top cover boss. The hammer core top cover has a top cover through hole in the middle. The lower edge of the top cover through hole has a top cover guide cavity. The outer side of the boss is provided with a top cover connecting external thread; an annular boss is provided in the middle of the inner wall of the connecting cylinder, and a guide hole is formed on the inner side of the annular boss; the inner edges of the upper and lower ends of the connecting cylinder are respectively provided with upper connecting internal threads and lower connecting internal threads; the connecting rod includes a connecting rod, a pre-tightening pull head, and a ball head; the ball head and the pre-tightening pull head are respectively connected to the upper and lower ends of the connecting rod; the bottom surface of the pre-tightening pull head is provided with a pull thread hole in the middle; the lower guide sleeve has a lower guide pressure support surface, and the upper guide sleeve has an upper guide pressure support surface; the installation method includes the following steps: S1. An installation auxiliary bracket is provided, comprising a first tooling frame, a double-ended screw, a second tooling frame, and a ball head seat. The first tooling frame comprises a first top plate, a first bottom plate, and four first support columns. The upper ends of the four first support columns are respectively connected to the four corners of the bottom surface of the first top plate, and the lower ends of the four first support columns are respectively connected to the top surface of the first bottom plate. A first through hole is provided in the middle of the first top plate. The second tooling frame comprises a second top plate, a second bottom plate, and four second support columns. The upper ends of the four second support columns are respectively connected to the four corners of the bottom surface of the second top plate, and the lower ends of the four second support columns are respectively connected to the top surface of the second bottom plate. A second through hole is provided in the middle of the second top plate, and multiple first screw holes are provided in the middle of the top surface of the second bottom plate. Multiple first bolt holes are provided on the ball head seat. S2. First, fix the first tooling frame on a flat ground and fix the lower flange on the top surface of the first top plate. Then, put the lower buffer disc spring, lower guide sleeve, and connecting cylinder on the lower flange in sequence. Next, rotate the connecting cylinder downward so that the lower connecting internal thread of the connecting cylinder engages with the flange connecting external thread of the lower flange. When the connecting cylinder cannot be rotated easily, it indicates that the lower guide pressure support surface of the lower guide sleeve and the lower buffer disc spring are in close contact. At this time, the gap between the bottom surface of the lower guide sleeve and the bottom of the flange guide cavity is H2, and the gap between the end face of the lower end of the connecting cylinder and the circumferential edge of the top surface of the flange body is H1, where H1 is less than H2. S3. First, the connecting rod is inserted into the guide hole of the connecting cylinder from top to bottom using the pre-tightening pull head. Then, the upper end of the double-ended screw is passed through the first through hole, the flange through hole, the lower guide sleeve and the pull thread hole on the bottom surface of the pre-tightening pull head from bottom to top, so that the bottom surface of the pre-tightening pull head fits against the top surface of the lower guide sleeve. The first nut is then threadedly connected to the lower end of the double-ended screw. S4. Continue to tighten the first nut at the lower end of the double-ended screw with a wrench. Use the double-ended screw to pull the connecting rod downwards. The bottom surface of the pre-tightening pull head presses against the top surface of the lower guide sleeve and moves downwards together, causing the lower guide sleeve's lower guide bearing surface to compress the lower buffer disc spring until the compression stroke gap H2 disappears. At this time, the connecting cylinder will no longer be subject to the force of the lower buffer disc spring. Then, rotate the connecting cylinder downwards until the end face of the lower end of the connecting cylinder is tightly fitted with the circumferential edge of the top surface of the flange body. Next, slowly loosen the first nut at the lower end of the double-ended screw, allowing the lower guide sleeve to return to the gap of H2-H1 between the bottom surface of the lower guide sleeve and the bottom of the flange guide cavity under the spring force of the lower buffer disc spring. Then, remove the double-ended screw and the first nut at its lower end. At this time, the lower mechanism in the disc spring hammer core buffer device is installed. S5. Fix the second tooling frame on a flat ground and fix the hammer core top cover on the top surface of the second top plate. Then, put the upper buffer disc spring and the upper guide sleeve on the hammer core top cover in sequence. Then, flip the lower mechanism of the disc spring hammer core buffer device and use the upper end of the connecting rod to pass through the upper guide sleeve, the top cover through hole and the second through hole from top to bottom in sequence. The connecting cylinder of the lower mechanism is sleeved on the outside of the upper buffer disc spring. S6. Rotate the connecting cylinder of the lower mechanism downwards so that the upper connecting internal thread of the connecting cylinder engages with the top cover connecting external thread of the hammer core top cover. When the connecting cylinder of the lower mechanism cannot be rotated easily, it indicates that the upper guide pressure support surface of the upper guide sleeve and the upper buffer disc spring are in close contact. At this time, the gap between the top surface of the upper guide sleeve and the bottom of the guide cavity of the top cover is H4, and the gap between the end face of the upper end of the connecting cylinder and the circumferential edge of the bottom surface of the top cover body is H3, where H3 is less than H4. Due to the action of the lower buffer disc spring, the circumferential edge of the top surface of the pre-tightening pull head is in close contact with the bottom surface of the upper guide sleeve. Then, use a ball head seat to wrap around the ball head at the upper end of the connecting rod, and use the first connecting bolt to thread through the first bolt hole of the ball head seat from top to bottom and connect with the first screw hole on the second base plate, ensuring that the distance between the bottom surface of the ball head seat and the top surface of the second base plate is H5, where H5 is greater than H4. S7. Continue to tighten the first connecting bolt with a wrench, pull the ball head of the connecting rod wrapped with the ball head seat downwards, and at the same time use the connecting rod to press the circumferential edge of the top surface of the pre-tightening pull head against the bottom surface of the upper guide sleeve and move them downwards together, so that the upper guide sleeve's upper guide abutment support surface compresses the upper buffer disc spring until the compression stroke gap H4 disappears. At this time, the connecting cylinder of the lower mechanism will not be subject to the force of the upper buffer disc spring. Then, rotate the connecting cylinder of the lower mechanism downwards until the top surface of the connecting cylinder of the lower mechanism is tightly fitted with the circumferential edge of the bottom surface of the top cover body until the gap H3 disappears. Next, slowly loosen the first connecting bolt. Under the spring force of the upper buffer disc spring, the top surface of the upper guide sleeve and the bottom of the guide cavity of the top cover will return to the gap H4-H3. Then remove the ball head seat. At this point, the disc spring hammer core buffer device is installed.

2. The installation method of the disc spring hammer core buffer device as described in claim 1, characterized in that, The bottom surface of the flange body is provided with a plurality of flange threaded holes, which are evenly distributed circumferentially around the flange through hole; the first top plate is also provided with a plurality of second bolt holes, which are evenly distributed circumferentially around the first through hole; step S2 further includes the following steps: S21. First, place the lower flange on the top surface of the first top plate. Then, use the second connecting bolt to thread it through the second bolt hole from bottom to top and connect it to the flange thread hole, thereby fixing the lower flange on the top surface of the first top plate.

3. The installation method of the disc spring hammer core buffer device as described in claim 2, characterized in that, The top surface of the flange boss forms a flange disc spring support surface. The lower guide sleeve includes a lower guide cylinder and an annular lower guide preload boss. The lower guide preload boss is installed on the upper end of the outer side of the lower guide cylinder, and the bottom surface of the lower guide preload boss forms the lower guide pressure support surface. Step S2 further includes the following steps: S22. First, place the lower buffer disc spring on the flange disc spring support surface, then insert the lower guide sleeve into the flange guide cavity, so that the lower buffer disc spring is supported on the lower guide pressure support surface. Next, put the connecting sleeve on the outer side of the lower buffer disc spring, so that the lower buffer disc spring, the lower guide sleeve, and the connecting sleeve are sequentially put on the lower flange.

4. The installation method of the disc spring hammer core buffer device as described in claim 1, characterized in that, The top cover body has multiple top cover bolt holes on its circumferential edge, and the multiple top cover bolt holes are evenly distributed around the top cover through hole; the second top plate also has multiple third bolt holes, and the multiple third bolt holes are evenly distributed around the second through hole; step S5 further includes the following steps: S51. First, place the hammer core top cover on the top surface of the second top plate. Then, use the third connecting bolt to pass through the bolt hole of the top cover and the third bolt hole from top to bottom and thread it to the second nut. Tighten the second nut with a wrench to fix the hammer core top cover on the top surface of the second top plate.

5. The installation method of the disc spring hammer core buffer device as described in claim 4, characterized in that, The top surface of the top cover boss forms a top cover disc spring support surface. The upper guide sleeve includes an upper guide cylinder and an annular upper guide pre-tightening boss. The upper guide pre-tightening boss is installed at the lower end of the outer side of the upper guide cylinder, and the top surface of the upper guide pre-tightening boss forms the upper guide pressing support surface. Step S2 further includes the following steps: S52. First, place the upper buffer disc spring on the disc spring support surface of the top cover, then insert the upper guide sleeve into the guide cavity of the top cover, so that the upper buffer disc spring is supported on the upper guide pressing support surface, thereby so that the upper buffer disc spring and the upper guide sleeve are sequentially fitted on the top cover of the hammer core.

6. The installation method of the disc spring hammer core buffer device as described in claim 1, characterized in that, The outer side of the connecting cylinder is provided with multiple wrench holes. A special wrench is inserted into the wrench holes, and the connecting cylinder is rotated and moved downward using the special wrench.

7. The installation method of the disc spring hammer core buffer device as described in claim 1, characterized in that, The ball joint seat includes a first half-ball joint surround, a second half-ball joint surround, multiple surround connecting bolts, and multiple surround nuts. The first half-ball joint surround has multiple first surround bolt holes on both sides, and the second half-ball joint surround has multiple second surround bolt holes on both sides. Step S6 further includes the following steps: S61. The first half of the ball head surround and the second half of the ball head surround are respectively wrapped around the left and right sides of the ball head. The surround connecting bolts pass through the first surround bolt hole and the second surround bolt hole in sequence and are threadedly connected to the surround nut, so that the ball head seat is wrapped around the ball head at the upper end of the connecting rod.

8. A method for disassembling a disc-shaped spring hammer core buffer device, characterized in that, Includes the following steps: S81. A disc-shaped spring hammer core buffer device is provided, wherein the disc-shaped spring hammer core buffer device is a device that has been installed after implementing the installation method described in any one of claims 1 to 7. S82. Fix the second tooling frame on a flat ground, flip the disc spring hammer core buffer device, insert the upper end of the connecting rod into the second through hole of the second top plate from top to bottom, and fix the hammer core top cover of the disc spring hammer core buffer device on the top surface of the second top plate. S83. Using the ball head seat to wrap around the ball head at the upper end of the connecting rod, the first connecting bolt passes through the first bolt hole of the ball head seat from top to bottom and is pre-connected to the first screw hole on the second base plate. The first connecting bolt is tightened with a wrench, and the ball head of the connecting rod wrapped by the ball head seat is pulled downward. At the same time, the circumferential edge of the pre-tightening pull head is pressed against the bottom surface of the upper guide sleeve and moved downward together, so that the upper guide support surface of the upper guide sleeve compresses the upper buffer disc spring until the upper end face of the upper guide sleeve abuts against the bottom of the guide cavity of the top cover. At this time, the connecting cylinder will not be subject to the force of the upper buffer disc spring. Then, the connecting cylinder is rotated and moved upward until the upper end of the connecting cylinder is disengaged from the hammer core top cover. Then, the first connecting bolt and the ball head seat are removed. At this point, the hammer core top cover, the upper buffer disc spring, and the upper guide sleeve have been completely disassembled from the disc spring hammer core buffer device, forming the lower mechanism of the disc spring hammer core buffer device. S84. Fix the first fixture on a flat ground, take out the lower part of the disc spring hammer core buffer device from the second fixture, and flip it over. Fix the lower flange of the lower part of the disc spring hammer core buffer device to the top surface of the first top plate. Connect the upper end of the double-ended screw to the first through hole, the flange through hole, the lower guide sleeve and the tension thread hole on the bottom surface of the pre-tightening tension head in sequence from bottom to top, and connect the lower end of the double-ended screw with the first nut. S85. Continue to tighten the first nut at the lower end of the double-ended screw with a wrench. Use the double-ended screw to pull the connecting rod downward. The bottom surface of the pre-tightening pull head presses against the top surface of the lower guide sleeve and moves downward together, so that the lower guide sleeve's lower guide abutment support surface compresses the lower buffer disc spring until the lower end face of the lower guide sleeve abuts against the bottom of the flange guide cavity. At this time, the connecting cylinder will not be subject to the force of the lower buffer disc spring. Then, rotate the connecting cylinder upward until the lower end of the connecting cylinder is disengaged from the lower flange. Then remove the first nut and the double-ended screw. At this point, the disc spring hammer core buffer device has been completely disassembled.

9. A method for disassembling a disc-shaped spring hammer core buffer device, characterized in that, Includes the following steps: S91. A disc-shaped spring hammer core buffer device is provided, wherein the disc-shaped spring hammer core buffer device is a device that has been installed after implementing the installation method of any one of claims 1 to 7. S92. Fix the first tooling frame on a flat ground, fix the lower flange of the disc spring hammer core buffer device to the top surface of the first top plate, and connect the upper end of the double-ended screw to the pull thread hole on the bottom surface of the pre-tightening pull head by passing through the first through hole, the flange through hole, and the lower guide sleeve from bottom to top, and use the first nut to connect the lower end of the double-ended screw. S93. Continue to tighten the first nut at the lower end of the double-ended screw with a wrench. Use the double-ended screw to pull the connecting rod downward. The bottom surface of the pre-tightening pull head presses against the top surface of the lower guide sleeve and moves downward together, so that the lower guide sleeve's lower guide abutment support surface compresses the lower buffer disc spring until the lower end face of the lower guide sleeve abuts against the bottom of the flange guide cavity. At this time, the connecting cylinder will not be subject to the force of the lower buffer disc spring. Then, rotate the connecting cylinder upward until the lower end of the connecting cylinder is disengaged from the lower flange. Then, remove the first nut and the double-ended screw. At this point, the lower flange, the lower buffer disc spring, and the lower guide sleeve have been completely disassembled from the disc spring hammer core buffer device, forming the upper mechanism of the disc spring hammer core buffer device. S94. Fix the second fixture on a flat ground, take out the upper part of the disc spring hammer core buffer device from the first fixture, flip it over, insert the upper end of the connecting rod into the second through hole of the second top plate from top to bottom, and fix the hammer core top cover of the disc spring hammer core buffer device on the top surface of the second top plate. S95. Using the ball head seat to wrap around the ball head at the upper end of the connecting rod, the first connecting bolt passes through the first bolt hole of the ball head seat from top to bottom and is pre-connected to the first screw hole on the second base plate. Continue to tighten the first connecting bolt with a wrench, pull the ball head of the connecting rod wrapped by the ball head seat downward, and at the same time use the connecting rod to press the circumferential edge of the pre-tightening pull head top surface onto the bottom surface of the upper guide sleeve and move them downward together, so that the upper guide abutment support surface of the upper guide sleeve compresses the upper buffer disc spring until the upper end face of the upper guide sleeve abuts the bottom of the guide cavity of the top cover. At this time, the connecting cylinder will not be subject to the force of the upper buffer disc spring. Then, rotate the connecting cylinder upward until the upper end of the connecting cylinder is disengaged from the hammer core top cover. Then remove the first connecting bolt and the ball head seat; at this point, the disc spring hammer core buffer device is completely disassembled.

10. A disc spring hammer core buffer device employing the installation method according to any one of claims 1 to 7, characterized in that, The assembly includes a lower flange, a connecting cylinder, a connecting rod, a hammer core top cover, an upper guide sleeve, a lower guide sleeve, an upper buffer disc spring, and a lower buffer disc spring. The lower flange comprises a flange body and an annular flange boss, the inner ring of which forms a flange guide cavity. The hammer core top cover comprises a top cover body and an annular top cover boss, with a top cover through hole in the center and a top cover guide cavity on the lower edge of the top cover through hole. The hammer core top cover and the lower flange are respectively connected to the upper and lower ends of the connecting cylinder. The upper and lower guide sleeves are respectively inserted into the top cover guide cavity and the flange guide cavity, and are respectively connected to the connecting cylinder. The inner wall of the cylinder forms an upper disc spring cavity and a lower disc spring cavity, and the upper and lower buffer disc springs are respectively installed in the upper and lower disc spring cavities. The connecting rod includes a connecting rod and a pre-tensioning pull head. The pre-tensioning pull head is connected to the lower end of the connecting rod. The connecting rod is installed between the upper guide sleeve and the lower guide sleeve through the pre-tensioning pull head. The upper end of the connecting rod passes through the upper guide sleeve and the top cover through hole from bottom to top. The top surface of the pre-tensioning pull head abuts against the lower end surface of the upper guide sleeve, and the bottom surface of the pre-tensioning pull head abuts against the upper end surface of the lower guide sleeve.

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