A dismounting tool

Abstract

The application discloses a dismounting tool, which comprises an arc-shaped plate, an assembling bolt, an assembling nut and an ejection bolt, the depth of the assembling hole is smaller than the length of the exposed pin bolt on the shaft coupling, the assembling nut is matched with the exposed part of the pin bolt on the assembling hole, the arc-shaped plate is locked on the shaft coupling, the depth of the working hole is greater than the length of the exposed pin bolt on the shaft coupling, the ejection bolt is located in the working hole, the ejection bolt is screwed, the ejection bolt moves towards the pin bolt, and a pushing force is applied to the pin bolt. The dismounting tool disclosed by the scheme slowly applies the pushing force to the pin bolt through the screwing of the ejection bolt, the dismounting mode is more gentle, the damage to the pin bolt can be reduced, and after the ejection bolt pushes the pin bolt in the tapered hole for a distance, a clearance fit is formed between the pin bolt and the tapered hole, the pin bolt can be manually taken out of the tapered hole by the worker, the pin bolt cannot be instantaneously ejected, and therefore the safety of the maintenance operation is improved.

Description

Technical Field

[0001] This application relates to the field of nuclear power plant equipment component disassembly and repair technology, and in particular to a disassembly tool. Background Technology

[0002] The Control Rod Drive Mechanism Power System (RAM) is a dedicated power supply system for the Control Rod Drive Mechanism (CRDM) equipment, used to control the rapid response of the reactor core. The RAM system consists of two electric generator sets, each containing an engine and a generator connected by a coupling. The generator is equipped with a flywheel, and the flywheel pin bolts are tapered and fitted to the coupling. Specifically, one end of the pin bolt is tapered, and the coupling has a corresponding tapered hole. When the pin bolt is inserted into the tapered hole of the coupling, tightening the nut or using other fastening methods creates a clamping force between the tapered portion of the pin bolt and the tapered hole, thus achieving a secure connection.

[0003] The annual inspection of the RAM system includes checking the coupling pin bolts. The inspection method is as follows:

[0004] Maintenance personnel used a puller to remove the motor's half-coupling and pin bolt assembly; they then removed the pin bolt nuts and used an octagonal hammer to knock the pin bolts off the half-coupling one by one. This hammering disassembly process easily damaged the pin bolts, resulting in approximately two-thirds of them sustaining varying degrees of damage. Furthermore, there was a risk that the pin bolts could fly off during the hammering process, potentially injuring personnel and surrounding equipment.

[0005] Therefore, how to reduce damage to the pin bolts during maintenance and improve the safety of maintenance operations has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] This application proposes a disassembly tool to reduce damage to the pin bolts during maintenance and to improve the safety of maintenance operations.

[0007] To achieve the above objectives, this application provides a disassembly tool suitable for disassembling pin bolts in a RAM system, comprising an arc-shaped plate, a mounting bolt, a mounting nut, and an ejector bolt.

[0008] The arc-shaped plate is adapted to the shape of the portion of the coupling where the pin bolts are located. The arc-shaped plate has assembly holes and working holes corresponding to the positions of the pin bolts.

[0009] The depth of the working hole is greater than the length of the portion of the pin bolt exposed above the coupling. The working hole is a threaded hole, and the ejector bolt is threaded into the working hole. Tightening the ejector bolt causes it to apply a thrust to the pin bolt.

[0010] The depth of the mounting hole is less than the length of the portion of the pin bolt exposed on the coupling. The portion of the pin bolt exposed in the mounting hole mates with the mounting nut to lock the arc-shaped plate onto the coupling.

[0011] The mounting bolt is used to assemble the pin bolt into the tapered hole and the mounting hole after the pin bolt is removed from the tapered hole of the coupling. The mounting bolt cooperates with the mounting nut to lock the arc plate onto the coupling.

[0012] Preferably, in the above-mentioned disassembly tool, the arc-shaped plate is provided with a boss at the position corresponding to the working hole. The boss protrudes from the side of the arc-shaped plate away from the coupling, and the side of the arc-shaped plate close to the coupling fits against the coupling.

[0013] Preferably, in the above-mentioned disassembly tool, the boss is a fan-shaped boss, which is coaxially arranged with the arc-shaped plate, and the width of the fan-shaped boss along the radial direction of the arc-shaped plate is equal to the width of the arc-shaped plate.

[0014] Preferably, in the above-mentioned disassembly tool, the boss is a cylindrical boss or a prismatic boss.

[0015] Preferably, in the above-mentioned disassembly tool, a nut is welded to the boss to enhance the connection strength between the ejector bolt and the arc-shaped plate.

[0016] Preferably, in the above-mentioned disassembly tool, the arc-shaped plate and the boss are integrally milled or integrally cast.

[0017] Preferably, in the above-mentioned disassembly tool, the diameter of the working hole is larger than the diameter of the assembly hole.

[0018] Preferably, in the above-mentioned disassembly tool, the assembly holes and the working holes are arranged at intervals in the extending direction of the arc-shaped plate.

[0019] Preferably, in the above-mentioned disassembly tool, the assembly holes are located at both ends of the arc-shaped plate, and the working holes are located in the middle of the arc-shaped plate.

[0020] Preferably, in the above-mentioned disassembly tool, the number of assembly holes is greater than or equal to the number of working holes.

[0021] The disassembly tool provided in this application includes an arc-shaped plate, an assembly bolt, an assembly nut, and an ejector bolt. The arc-shaped plate has an assembly hole and a working hole, which correspond to the position of the pin bolt. The depth of the assembly hole is less than the length of the pin bolt exposed on the coupling. After the assembly hole of the arc-shaped plate is fitted onto the pin bolt, the assembly nut engages with the portion of the pin bolt exposed in the assembly hole, locking the arc-shaped plate onto the coupling. The depth of the working hole is greater than the length of the pin bolt exposed on the coupling. The working hole is a threaded hole. The ejector bolt is located in the working hole. When the ejector bolt is tightened, it moves toward the pin bolt, applying a thrust to the pin bolt. The deeper the ejector bolt is screwed in, the greater the thrust applied to the pin bolt. Under the thrust of the ejector bolt, the pin bolt disengages from the tapered hole in the coupling used to install the pin bolt. The disassembly tool disclosed in this solution disassembles the pin bolt by slowly applying a pushing force to the pin bolt through the tightening of the ejector bolt. Compared with the method of disassembling the pin bolt by hammering in related technologies, the disassembly method is gentler and can reduce damage to the pin bolt. After the ejector bolt pushes the pin bolt a certain distance in the conical hole, a clearance fit is formed between the pin bolt and the conical hole. The operator can manually remove the pin bolt from the conical hole without the pin bolt flying out suddenly, thereby improving the safety of maintenance operations. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0023] Figure 1 This is a schematic diagram of the disassembly tool disclosed in this application;

[0024] Figure 2 This is a front view of the arc-shaped plate of the disassembly tool disclosed in this application;

[0025] Figure 3 This is a top view of the arc-shaped plate of the disassembly tool disclosed in this application.

[0026] The attached diagram is described below:

[0027] 1-Arc plate; 11-Assembly hole; 12-Working hole; 13-Boss; 2-Assembly bolt; 3-Assembly nut; 4-Ejector bolt. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0029] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features.

[0030] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0031] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0032] Please see Figures 1-3 .

[0033] This solution discloses a disassembly tool suitable for RAM systems, used for disassembling the pin bolts of RAM systems. Figure 1 The structural diagram of the disassembly tool includes an arc plate 1, an assembly bolt 2, an assembly nut 3, and an ejector bolt 4.

[0034] The arc plate 1 is adapted to the shape of the part of the coupling where the pin bolts are set. Preferably, after the arc plate 1 is fixed on the coupling, the inner arc of the arc plate 1 can fit with the bushing of the coupling, and the bushing can position the arc plate 1.

[0035] The arc-shaped plate 1 has an assembly hole 11 and a working hole 12, which correspond to the positions of the pin bolts. Optionally, the arc of the arc-shaped plate 1 is 90°-180°. When the arc of the arc-shaped plate 1 is 90°, the length of the arc-shaped plate 1 is relatively short, and the number of assembly holes 11 and working holes 12 that can be set on it is relatively small. When the arc of the arc-shaped plate 1 is 180°, the length of the arc-shaped plate 1 is relatively long, and the number of assembly holes 11 and working holes 12 that can be set on it is relatively large.

[0036] In this design, the depth of the working hole 12 is greater than the length of the pin bolt exposed on the coupling. The working hole 12 is a threaded hole. The ejector bolt 4 is located in the working hole 12 and is threaded into the working hole 12. When the ejector bolt 4 is tightened, the ejector bolt 4 moves in the direction of the pin bolt and applies a thrust to the pin bolt. As the ejector bolt 4 is screwed in deeper, the thrust applied by the ejector bolt 4 to the pin bolt is greater. Under the thrust of the ejector bolt 4, the pin bolt disengages from the tapered hole of the coupling used to install the pin bolt.

[0037] In this scheme, the depth of the mounting hole 11 is less than the length of the pin bolt exposed on the coupling. After the mounting hole 11 of the arc plate 1 is fitted onto the pin bolt, the mounting nut 3 engages with the part of the pin bolt exposed in the mounting hole 11 to lock the arc plate 1 on the coupling.

[0038] After a pin bolt is removed from the tapered hole of the coupling, an assembly bolt 2 is installed in the tapered hole. The assembly bolt 2 passes through the tapered hole and the assembly hole 11 in sequence and then engages with the assembly nut 3 to lock the arc plate 1 on the coupling.

[0039] The process of removing the pin bolts is as follows:

[0040] Place the arc plate 1 on the coupling, with the exposed portion of the pin bolt extending into the assembly hole 11 and working hole 12 of the arc plate 1.

[0041] The assembly nut 3 and the exposed portion of the pin bolt in the assembly hole 11 are engaged to lock the arc plate 1 on the coupling.

[0042] The ejector bolt 4 is installed in the working hole 12. Tighten the ejector bolt 4. The ejector bolt 4 applies a thrust to the pin bolt and slowly pushes the pin bolt out of the tapered hole of the coupling.

[0043] Unscrew the mounting nut 3 from the pin bolt and loosen the ejector bolt 4. Remove the arc plate 1 from the coupling and move it to the next position of the coupling.

[0044] The portion of the unremoved pin bolt exposed on the coupling extends into the assembly hole 11 and working hole 12 of the arc plate 1. The assembly bolt 2 is installed in the tapered hole of the removed pin bolt. The assembly nut 3 engages with the portion of the pin bolt and the assembly bolt 2 exposed in the assembly hole 11 to lock the arc plate 1 on the coupling.

[0045] The ejector bolt 4 is installed in the working hole 12. Tighten the ejector bolt 4. The ejector bolt 4 applies a thrust to the pin bolt and slowly pushes the pin bolt out of the tapered hole of the coupling.

[0046] This process continues until all the pin bolts have been removed.

[0047] When all the mounting holes 11 have protruding pin bolts, the arc plate 1 is locked onto the coupling by the engagement of the mounting nut 3 through the pin bolts;

[0048] When some assembly holes 11 have pin bolts and some assembly holes 11 do not have pin bolts, the assembly bolts 2 are installed in the assembly holes 11 without pin bolts. The arc plate 1 is locked on the coupling by the assembly nut 3 cooperating with the pin bolts and the assembly bolts 2.

[0049] When there are no pin bolts in any of the assembly holes 11, the assembly bolts 2 are installed in the assembly holes 11, and the arc plate 1 is locked onto the coupling by the assembly nut 3 through the assembly bolts 2.

[0050] Figure 2In one embodiment, the arc-shaped plate 1 has two mounting holes 11 and one working hole 12, with the mounting holes 11 located on both sides of the working hole 12. During operation, the arc-shaped plate 1 is placed on the coupling, and the mounting holes 11 and working holes 12 are respectively fitted onto the pin bolts of the coupling. For ease of subsequent description, the mounting hole 11 located to the left of the working hole 12 is named the first mounting hole 11, the mounting hole 11 located to the right of the working hole 12 is named the second mounting hole 11, the pin bolt corresponding to the first mounting hole 11 is named the first pin bolt, the pin bolt corresponding to the working hole 12 is named the second pin bolt, the pin bolt corresponding to the second mounting hole 11 is named the third pin bolt, the pin bolt adjacent to and to the right of the third pin bolt is named the fourth pin bolt, and the pin bolt adjacent to and to the right of the fourth pin bolt is named the fifth pin bolt.The portions of the first and third pin bolts exposed in the mounting hole 11 mate with the mounting nut 3, locking the arc plate 1 onto the coupling. The ejector bolt 4 rotates in the tightening direction within the working hole 12, applying a thrust to the second pin bolt and slowly pushing it out. At this point, the first tapered hole used for installing the second pin bolt is emptied. Loosening the mounting nut 3 and the ejector bolt 4 releases the locking of the arc plate 1 onto the coupling. Moving the arc plate 1 to the right of the first pin bolt, the first mounting hole 11 is now aligned with the first tapered hole, and the working hole 12 is aligned with the third pin bolt. The second mounting hole... Positioned opposite to the fourth pin bolt, the first assembly bolt 2 is inserted into the first assembly hole 11 and the first tapered hole. The assembly nut 3 is then engaged with the first assembly bolt 2 and the fourth pin bolt to lock the arc plate 1 onto the coupling. The third pin bolt is positioned opposite to the working hole 12. The ejector bolt 4 is rotated in the tightening direction within the working hole 12, applying a thrust to the third pin bolt and slowly pushing it out. At this point, the second tapered hole used to install the third pin bolt is emptied. The assembly nut 3 and the ejector bolt 4 are loosened to release the locking of the arc plate 1 onto the coupling, and the first pin bolt continues to be pushed out to the right. Laterally move the arc-shaped plate 1. At this time, the first mounting hole 11 is opposite to the second conical hole, the working hole 12 is opposite to the fifth pin bolt, and the second mounting hole 11 is opposite to the sixth pin bolt. Insert the first mounting bolt 2 into the first mounting hole 11 and the second conical hole, and mate the mounting nut 3 with the first mounting bolt 2 and the fifth pin bolt to lock the arc-shaped plate 1 onto the coupling. The fourth pin bolt is opposite to the working hole 12. The ejector bolt 4 rotates in the tightening direction in the working hole 12, applying a pushing force to the fourth pin bolt and slowly pushing it out. At this time, the fourth pin bolt is used to install the first... Three conical holes are left empty; and so on, until only one pin bolt remains on the coupling. The working hole 12 is positioned opposite the remaining pin bolt, the first assembly hole 11 corresponds to the conical hole on the left side of the remaining pin bolt, and the second assembly hole 11 corresponds to the second conical hole. The assembly bolt 2 is inserted into the first assembly hole 11 and the second assembly hole 11. The assembly bolt 2 cooperates with the assembly nut 3 to lock the locking arc plate 1 on the coupling. The ejector bolt 4 rotates in the working hole 12 in the tightening direction, applying a pushing force to the remaining pin bolt and slowly pushing the remaining pin bolt out. At this time, all the pin bolts of the coupling are disassembled.

[0051] Preferably, the assembly holes are located on both sides of the working hole to ensure that the arc plate is evenly distributed on both sides of the working hole. This solution uses a disassembly tool to disassemble the pin bolt. Tightening the ejector bolt 4 slowly applies a pushing force to the pin bolt, thus pushing it forward. Compared to related technologies that disassemble pin bolts by hammering, this method is gentler and reduces damage to the pin bolt. Furthermore, after the ejector bolt 4 pushes the pin bolt a certain distance within the tapered hole, a clearance fit is formed between the pin bolt and the tapered hole, allowing workers to manually remove the pin bolt from the tapered hole without it flying out instantly, thereby improving the safety of maintenance operations.

[0052] The disassembly tool disclosed in this solution has a simple structure and ingenious design. It can disassemble the pin bolt without using a puller to remove the half coupling and the pin bolt from the motor. It can also be used in small spaces, solving the problem of inconvenient tool operation due to the short distance between the motor and the coupling.

[0053] The arc plate 1 has an arc-shaped cross-section in the direction perpendicular to the axis of the coupling. The side of the arc plate 1 that is in contact with the coupling can be a plane or not.

[0054] In an embodiment where the side of the arc plate 1 that fits with the coupling is flat, a protrusion is provided on the side of the arc plate 1 away from the coupling and at the position corresponding to the working hole 12. The function of the protrusion is to increase the thickness of the arc plate 1 for opening the working hole 12, so as to ensure that the depth of the working hole 12 is greater than the length of the pin bolt exposed in the coupling. Correspondingly, the side of the arc plate 1 away from the coupling and at the position corresponding to the assembly hole 11 may not have a protrusion, so as to ensure that the depth of the assembly hole 11 is less than the length of the pin bolt exposed in the coupling.

[0055] In an embodiment where the side of the arc plate 1 that is in contact with the coupling is flat, a groove is provided on the side of the arc plate 1 away from the coupling and at the position corresponding to the mounting hole 11, and the mounting nut 3 is installed in the groove. No groove is provided on the side of the arc plate 1 away from the coupling and at the position corresponding to the working hole 12, so as to ensure the opening depth of the working hole 12.

[0056] In an embodiment where the side of the arc plate 1 that is in contact with the coupling is not flat, a protrusion can be provided on the side of the arc plate 1 that is close to the coupling. The protrusion is in contact with the coupling, and the part of the arc plate 1 that is close to the coupling and located on both sides of the protrusion is not in contact with the coupling. The cross section of the arc plate 1 along the axial direction of the coupling can be in the shape of a cross.

[0057] In an embodiment where the boss 13 is located on the side of the arc-shaped plate 1 away from the coupling, the cross-section of the boss 13 along the direction perpendicular to the axis of the coupling can be fan-shaped. In this embodiment, the boss 13 is a fan-shaped boss. Figure 1As shown, this is an embodiment where the boss 13 is a fan-shaped boss. The fan-shaped boss is arranged coaxially with the arc plate 1. The width of the fan-shaped boss along the radial direction of the arc plate 1 is equal to the width of the arc plate 1. After the arc plate 1 is installed on the coupling, the inner arc of the fan-shaped boss can also fit with the bushing of the coupling.

[0058] The boss 13 is not limited to a fan-shaped boss; it can also be cylindrical or prismatic, etc.

[0059] The shape of the boss 13 along the axis of the coupling is not limited to one type, but can also be a combination of two shapes. For example, the end of the boss 13 near the arc plate 1 is cylindrical, and the end away from the arc plate 1 is prismatic.

[0060] The longer the working hole 12 is, the stronger the fit between the ejector bolt 4 and the arc plate 1, the less damage to the internal thread of the working hole 12, and the longer the service life of the disassembly tool.

[0061] The working hole 12 can be extended by increasing the height of the protrusion beyond the plane of the arc plate 1, or by welding a nut onto the protrusion. Welding a nut onto the protrusion provides more flexibility in extending the working hole 12, and it is even possible to weld another nut onto the nut.

[0062] When the ejector bolt 4 applies a pushing force to the pin bolt, the pin bolt also applies a reaction force to the ejector bolt 4. This reaction force acts on the arc plate 1 and the protrusion on the structure of the disassembly tool with the working hole 12. In order to ensure the strength of the disassembly tool, especially the connection strength between the protrusion and the arc plate 1, the protrusion and the arc plate 1 are preferably integrally formed. The integral forming method of the protrusion and the arc plate 1 can be integral milling or integral casting.

[0063] Optionally, the clearance fit between the mounting hole 11 and the pin bolt is small to reduce the shaking of the arc plate 1 after it is locked on the coupling; the diameter of the working hole 12 is equal to the diameter of the mounting hole 11, which increases the diameter of the mounting bolt 2 that mates with the working hole 12, thereby increasing the contact area between the ejector bolt 4 and the pin bolt, improving the reliability of the ejector bolt 4 ejecting the pin bolt, and reducing damage to the pin bolt.

[0064] In some embodiments, the end of the ejector bolt 4 that mates with the pin bolt is provided with a groove that mates with the pin bolt to achieve a limiting fit between the ejector bolt 4 and the pin bolt.

[0065] In some embodiments, the thickness of the arc-shaped plate 1 is equal at all points along the axial direction of the coupling, and a locking nut is welded to the arc-shaped plate 1 at the position corresponding to the working hole 12. Specifically, a threaded hole is formed on the arc-shaped plate 1, and the threaded hole of the arc-shaped plate 1 and the threaded hole of the locking nut are combined to form the working hole 12, which mates with the ejector bolt 4.

[0066] There are multiple ways to set the assembly hole 11 and the working hole 12 on the arc plate 1.

[0067] In some embodiments, the assembly holes 11 and the working holes 12 are arranged at intervals on the arc-shaped plate 1, with at least one assembly hole 11 and at least one working hole 12 arranged at intervals along the length direction of the arc-shaped plate 1, such as... Figure 3 The example shown is an embodiment in which a working hole 12 is provided between two adjacent assembly holes 11.

[0068] In some embodiments, the assembly holes 11 are located at both ends of the arc plate 1, and the working holes 12 are located in the middle of the arc plate 1. The assembly holes 11 and the working holes 12 are arranged in sections along the length of the arc plate 1.

[0069] When at least two working holes 12 are provided on the arc plate 1, the disassembly tool can disassemble at least two pin bolts on the coupling at one time.

[0070] To ensure that the arc-shaped plate 1 of the disassembly tool can withstand the reaction force of the pin bolt acting on the ejector bolt 4, the arc-shaped plate 1 in this design is a metal plate, optionally made of stainless steel or aluminum alloy. The arc-shaped plate 1 is not limited to metal plates; it can also be made of other materials that meet strength requirements. The specific material selected is determined by those skilled in the art based on actual needs, and no specific limitation is made here.

[0071] During the disassembly of the pin bolt, the arc plate 1 needs to withstand a large force. In order to ensure the connection strength of the arc plate 1 on the coupling, the number of assembly holes 11 can optionally be greater than or equal to the number of working holes 12.

[0072] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A dismounting tool, characterized in that The disassembly of the pin bolts for RAM systems includes an arc plate (1), mounting bolts (2), mounting nuts (3), and ejector bolts (4). The arc-shaped plate (1) is adapted to the shape of the part of the coupling where the pin bolt is set. The arc-shaped plate (1) has an assembly hole (11) and a working hole (12) corresponding to the position of the pin bolt. The depth of the working hole (12) is greater than the length of the portion of the pin bolt exposed in the coupling. The working hole (12) is a threaded hole. The ejector bolt (4) is threaded into the working hole (12). Tightening the ejector bolt (4) causes it to apply a thrust to the pin bolt. The depth of the mounting hole (11) is less than the length of the portion of the pin bolt exposed on the coupling. The portion of the pin bolt exposed on the mounting hole (11) engages with the mounting nut (3) to lock the arc plate (1) onto the coupling. The assembly bolt (2) is used to assemble the pin bolt into the tapered hole and the assembly hole (11) after the pin bolt is taken out from the tapered hole of the coupling. The assembly bolt (2) cooperates with the assembly nut (3) to lock the arc plate (1) onto the coupling.

2. The disassembly tool according to claim 1, characterized in that The arc plate (1) is provided with a boss (13) at the position corresponding to the working hole (12). The boss (13) protrudes from the side of the arc plate (1) away from the coupling, and the side of the arc plate (1) close to the coupling fits against the coupling.

3. The tool of claim 2, wherein The boss (13) is a fan-shaped boss, which is coaxially arranged with the arc plate (1). The width of the fan-shaped boss along the radial direction of the arc plate (1) is equal to the width of the arc plate (1).

4. The tool of claim 2, wherein The boss (13) is a cylindrical boss or a prismatic boss.

5. The disassembly tool according to any one of claims 2-4, characterized in that, Nuts are welded to the boss (13) to enhance the connection strength between the ejector bolt (4) and the arc plate (1).

6. The disassembly tool according to claim 5, characterized in that, The arc plate (1) and the boss (13) are integrally milled or integrally cast.

7. The disassembly tool according to claim 1, characterized in that, The diameter of the working hole (12) is larger than the diameter of the assembly hole (11).

8. The disassembly tool according to claim 1, characterized in that, The assembly hole (11) and the working hole (12) are arranged at intervals in the extension direction of the arc plate (1).

9. The disassembly tool according to claim 1, characterized in that, The assembly holes (11) are located at both ends of the arc plate (1), and the working holes (12) are located in the middle of the arc plate (1).

10. The disassembly tool according to claim 1, characterized in that, The number of assembly holes (11) is greater than or equal to the number of working holes (12).

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