A tool for removing an engine rear hanger point mounting pin

Abstract

The utility model relates to the technical field of aero-engine maintenance discloses an engine rear lifting point mounting pin dismounting tool, including first dismounting subassembly, first dismounting subassembly includes first support seat, first top block and first puller. One end of first support seat is provided with first abutting face, the other end is provided with second abutting face, and one end of first support seat provided with first abutting face is provided with first containing groove for containing outer pin, one end of first support seat provided with second abutting face is provided with first through -hole that communicates second abutting face with first containing groove, and first containing groove and first through -hole are coaxial. First top block includes insertion part and abutting part, and first top block is provided with second through -hole that penetrates insertion part and abutting part. First puller includes first screw rod and the first puller cap of being fixed to one end of first screw rod. Nut is used for with first screw rod threaded connection, and one end of nut is provided with third abutting face for with second abutting face abut.

Description

Technical Field

[0001] This utility model relates to the field of aircraft engine maintenance technology, and in particular to a tool for removing the mounting pin of the engine rear lifting point. Background Technology

[0002] Currently, during the disassembly of the V2500 engine's rear mounting pin, a hammer and punch are typically used to remove the inner and outer pins sequentially. Because the outer pin of the V2500 engine's rear mounting pin is an empty tube with very thin walls and no leverage point, the punch is prone to slipping during repeated hammering, creating a safety hazard. Furthermore, the hammer and punch can easily damage and deform the outer pin's locking mechanism. Engine mounting pins are expensive; damage to them significantly increases engine repair costs, delays repairs, and consequently impacts flight operations, resulting in substantial economic losses.

[0003] Therefore, there is an urgent need for a tool to remove the engine rear mounting pin to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a tool for removing the engine rear mounting pin, which facilitates the removal of the engine rear mounting pin.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A tool for removing an engine rear mounting pin, the mounting pin including an outer pin and an inner pin, the outer pin having an inner hole, the inner pin being inserted into the inner hole of the outer pin, and including a first disassembly assembly, the first disassembly assembly including a first support base, a first top block and a first pulling member;

[0007] One end of the first support is provided with a first abutting surface, and the other end is provided with a second abutting surface. The first support is provided with a first receiving groove for accommodating the outer pin at the end of the first support with the first abutting surface, and a first communicating hole connecting the second abutting surface and the first receiving groove at the end of the first support with the second abutting surface. The first receiving groove and the first communicating hole are coaxially arranged.

[0008] The first top block includes an insertion part and an abutment part. The insertion part is used to insert into the inner hole of the outer pin, and the abutment part is used to abut against the end face of the outer pin. The first top block is provided with a second connecting hole that penetrates the insertion part and the abutment part.

[0009] The first pulling member includes a first screw and a first pulling cap fixed to one end of the first screw. The first screw can pass through the first connecting hole and the second connecting hole. The pulling cap is used to abut against the end of the abutting part away from the insertion part.

[0010] The nut is used for threaded connection with the first screw, and one end of the nut is provided with a third abutment surface for abutting against the second abutment surface.

[0011] As an improvement to the above technical solution, a first positioning pin is fixedly provided on the first abutting surface. The axis of the first positioning pin is parallel to the axis of the first receiving groove. The first positioning pin is used to insert into the threaded hole on the engine.

[0012] As an improvement to the above technical solution, the first disassembly assembly further includes an extension member. One end of the extension member is provided with a fourth abutment surface, and the other end is provided with a fifth abutment surface. The end of the extension member with the fourth abutment surface is also provided with a first pin hole for accommodating the first positioning pin. The extension member is also provided with a receiving hole that connects the first abutment surface and the second abutment surface. The receiving hole is used to accommodate the outer pin, and the diameter of the receiving hole is equal to the inner diameter of the first receiving groove.

[0013] As an improvement to the above technical solution, the extended member is provided with a second positioning pin at one end where the fifth abutment surface is provided. The second positioning pin is used to insert into the threaded hole on the engine.

[0014] As an improvement to the above technical solution, a second disassembly assembly is also included, which includes a base plate, a disassembly cylinder, a hook block, and a puller.

[0015] The bottom end of the disassembly cylinder is fixed to the base plate. The upper end of the disassembly cylinder is provided with a disassembly hole extending along the height direction of the disassembly cylinder. The lower part of the disassembly hole is provided with a support part for supporting the outer pin. The support part is fixed to the disassembly cylinder. The support part is provided with a third connecting hole. The base plate is provided with a fourth connecting hole. The third connecting hole, the fourth connecting hole and the disassembly hole are coaxially arranged. The diameter of the disassembly hole is not less than the outer diameter of the outer pin. The diameters of the third connecting hole and the fourth connecting hole are not less than the outer diameter of the inner pin and are less than the outer diameter of the outer pin.

[0016] The puller includes a connector, a jaw assembly, and a second screw. The second screw passes through the middle of the connector along its length and is threadedly connected to the connector. Both the top and bottom ends of the second screw are exposed outside the connector. The outer diameter of the bottom end of the second screw is smaller than the inner diameter of the outer pin. The jaw assembly includes two jaws, both of which are connected to the connector. The two jaws are located on opposite sides of the second screw. Each jaw can slide along the length of the connector to move closer to or further away from the second screw. The bottom end of each jaw is provided with a hook. Both sides of the disassembly cylinder are provided with hook blocks for the hooks to be hooked.

[0017] As an improvement to the above technical solution, the end of the hook block away from the disassembly cylinder is provided with a limiting groove extending along the axial direction parallel to the disassembly hole, and the receiving groove is used to accommodate the gripper when the hook part is hooked on the hook block.

[0018] As an improvement to the above technical solution, a second top block is also included, one end of which is provided with a groove for the second screw to extend into.

[0019] As an improvement to the above technical solution, the puller also includes a drive rod, and the top end of the second screw is provided with a fifth connecting hole, into which the drive rod can be inserted.

[0020] As an improvement to the above technical solution, the second disassembly assembly further includes a plurality of reinforcing ribs spaced circumferentially along the disassembly cylinder, and the reinforcing ribs all connect the disassembly cylinder and the base plate.

[0021] As an improvement to the above technical solution, a handle is fixedly provided on the base plate, and the handle is provided on both sides of the disassembly cylinder.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This utility model discloses a tool for removing the engine rear mounting pin. When removing the outer pin, first gently tap both ends of the outer pin with a plastic hammer to allow it to move axially. Push the front end of the outer pin to a position flush with the mounting lug. Insert the first pulling member into the second connecting hole inside the first top block, then carefully pass it through the outer pin. Next, pass the head of the first pulling member through the first connecting hole of the first support seat and tighten the nut. At this point, the first top block and the first support seat are located at opposite ends of the outer pin. The insertion part of the first top block is inserted into the inner hole of the outer pin, and the abutting part of the first top block abuts against the end face of the outer pin. The first abutting surface of the first support seat abuts against the side of the engine rear mounting lug, and the nut abuts against the second abutting surface of the first support seat. Use a box wrench to gradually tighten the nut. The first top block drives the outer pin to move into the first receiving groove of the first support seat until the outer pin is completely pulled out of the engine rear mounting lug. Remove the first removal component from the engine rear mounting lug, loosen the nut, and remove the outer pin. When removing the outer pin from the engine rear lifting point, the outer pin is slowly pulled out using a spiral method, avoiding violent disassembly and preventing damage to the outer pin, while also saving a lot of time. Attached Figure Description

[0024] Figure 1 This is a partial structural diagram of the first disassembly component of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the first support seat of the first disassembly component of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the structure of the first support seat of the first disassembly component of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model. Figure 2 ;

[0027] Figure 4 This is a schematic diagram of the structure of the first top block of the first disassembly assembly of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model. Figure 1 ;

[0028] Figure 5 This is a schematic diagram of the structure of the first top block of the first disassembly assembly of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model. Figure 2 ;

[0029] Figure 6 This is a schematic diagram of the nut structure of the first disassembly component of the engine rear mounting pin disassembly tool provided in this embodiment of the utility model;

[0030] Figure 7This is a schematic diagram of the structure of the first disassembly component of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the extended component of the first disassembly assembly of the engine rear mounting pin disassembly tool provided in this embodiment of the utility model. Figure 1 ;

[0032] Figure 9 This is a schematic diagram of the structure of the extended component of the first disassembly assembly of the engine rear mounting pin disassembly tool provided in this embodiment of the utility model. Figure 2 ;

[0033] Figure 10 This is a schematic diagram of the structure of the first pulling member of the first disassembly assembly of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model;

[0034] Figure 11 This is a schematic diagram of the structure of the first inner pin of the first disassembly component of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model;

[0035] Figure 12 This is a schematic diagram of the structure of the second disassembly component of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model;

[0036] Figure 13 This is a partial structural diagram of the second disassembly component of the engine rear mounting pin disassembly tool provided in this embodiment of the utility model. Figure 1 ;

[0037] Figure 14 This is a partial structural diagram of the second disassembly component of the engine rear mounting pin disassembly tool provided in this embodiment of the utility model. Figure 2 ;

[0038] Figure 15 This is a cross-sectional view of a portion of the structure of the second disassembly component of the engine rear mounting pin disassembly tool provided in this embodiment of the utility model;

[0039] Figure 16 This is a schematic diagram of the puller structure of the second disassembly component of the engine rear lifting point mounting pin disassembly tool provided in this embodiment of the utility model.

[0040] In the picture:

[0041] 1. First disassembly component;

[0042] 11. First support base; 111. First abutment surface; 112. Second abutment surface; 113. First receiving groove; 114. First connecting hole; 115. First positioning pin;

[0043] 12. First top block; 121. Insertion part; 122. Abutment part; 123. Second connecting hole;

[0044] 13. First traction component; 131. First screw; 132. Traction cap;

[0045] 14. Nut; 141. Third mating surface;

[0046] 15. Extension component; 151. Fourth abutment surface; 152. Fifth abutment surface; 153. First pin hole; 154. Receiving hole; 155. Second positioning pin;

[0047] 16. First inner sleeve;

[0048] 2. Second disassembly component;

[0049] 21. Base plate; 211. Fourth connecting hole;

[0050] 22. Disassembly cylinder; 221. Disassembly hole; 222. Support part; 2221. Third connecting hole;

[0051] 23. Hook block; 231. Limiting groove;

[0052] 24. Second top block; 241. Groove;

[0053] 25. Reinforcing ribs;

[0054] 26. Handle;

[0055] 27. Second inner sleeve;

[0056] 28. Lama;

[0057] 281. Connector; 282. Gripper assembly; 2821. Gripper; 28211. Hook; 283. Second screw; 284. Drive rod. Detailed Implementation

[0058] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0059] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0062] like Figure 1 - Figure 11 As shown, this embodiment provides a tool for removing the mounting pin of an engine rear mounting point. The mounting pin includes an outer pin and an inner pin. The outer pin has an inner hole, and the inner pin is inserted into the inner hole of the outer pin. The tool for removing the mounting pin of an engine rear mounting point includes a first removal assembly 1. The first removal assembly 1 includes a first support base 11, a first top block 12, and a first pulling member 13. One end of the first support base 11 is provided with a first abutting surface 111, and the other end is provided with a second abutting surface 112. The end of the first support base 11 with the first abutting surface 111 is provided with a first receiving groove 113 for accommodating the outer pin, and the end of the first support base 11 with the second abutting surface 112 is provided with a first connecting hole 114 connecting the second abutting surface 112 and the first receiving groove 113. The first receiving groove 113 and the first connecting hole 114 are coaxially arranged. The first top block 12 includes an insertion part 121 and an abutment part 122. The insertion part 121 is inserted into the inner hole of the outer pin, and the abutment part 122 is used to abut against the end face of the outer pin. The first top block 12 is provided with a second connecting hole 123 penetrating the insertion part 121 and the abutment part 122. The first pulling member 13 includes a first screw 131 and a first pulling cap 132 fixed to one end of the first screw 131. The first screw 131 can pass through the first connecting hole 114 and the second connecting hole 123. The pulling cap 132 is used to abut against the end of the abutment part 122 away from the insertion part 121. The nut 14 is used for threaded connection with the first screw 131. One end of the nut 14 is provided with a third abutment surface 141 for abutting against the second abutment surface 112.

[0063] Before using the engine rear mounting pin removal tool in this embodiment to remove the outer pin installed on the V2500 engine rear mounting point, the inner pin inside the outer pin is first removed using a hammer and punch. The specific process of removing the outer pin using the first removal component 1 is as follows:

[0064] Before disassembling the outer pin, soak the connection between the outer pin and the mounting lug of the engine rear mounting point in a loosening agent for 30 minutes. Then, gently tap both ends of the outer pin with a plastic hammer to allow it to move axially, and push the front end of the outer pin to be flush with the mounting lug.

[0065] Insert the first pulling member 13 into the second connecting hole 123 inside the first top block 12, then carefully pass it through the inside of the outer pin, and then pass the head of the first pulling member 13 through the first connecting hole 114 of the first support seat 11, and tighten it with the nut 14. At this time, the first top block 12 and the first support seat 11 are located at the two ends of the outer pin respectively. The insertion part 121 of the first top block 12 is inserted into the inner hole of the outer pin, the abutting part 122 of the first top block 12 abuts against the end face of the outer pin, the first abutting surface 111 of the first support seat 11 abuts against the side of the engine rear mounting lug, and the nut 14 abuts against the second abutting surface 112 of the first support seat 11.

[0066] Using a box wrench, gradually tighten nut 14. The first top block 12 drives the outer pin into the first receiving groove 113 of the first support seat 11 until the outer pin is completely pulled out from the engine rear mounting lug. Remove the first disassembly assembly 1 from the engine rear mounting lug, loosen nut 14, and remove the outer pin.

[0067] Optionally, a first inner sleeve 16 is provided inside the first support base 11. The first inner sleeve 16 is made of copper. By having the relatively soft first inner sleeve 16 come into contact with the outer pin, the risk of damage to the outer pin can be reduced.

[0068] Optionally, a first positioning pin 115 is fixedly provided on the first abutment surface 111. The axis of the first positioning pin 115 is parallel to the axis of the first receiving groove 113. The first positioning pin 115 is used to insert into the threaded hole on the engine. The threaded hole on the engine is the original structure on the V2500 engine. A first positioning pin 115 is provided on both sides of the first receiving groove 113 on the first support seat 11. The positioning between the first support seat 11 and the engine rear mounting lug is achieved by inserting the first positioning pin 115 into the threaded hole on the engine, thus preventing the first support seat 11 from sliding along the side of the engine rear mounting lug.

[0069] Optionally, the first disassembly assembly 1 further includes an extension member 15. One end of the extension member 15 is provided with a fourth abutment surface 151, and the other end is provided with a fifth abutment surface 152. The end of the extension member 15 with the fourth abutment surface 151 is also provided with a first pin hole 153 for accommodating a first positioning pin 115. The extension member 15 also has a receiving hole 154 connecting the first abutment surface 111 and the second abutment surface 112. The receiving hole 154 is used to accommodate an outer pin, and the diameter of the receiving hole 154 is equal to the inner diameter of the first receiving groove 113. The first pin hole 153 and the first positioning pin 115 are provided in a one-to-one correspondence. After the first positioning pin 115 on the first support base 11 is inserted into the first pin hole 153 on the extension member 15, the first receiving groove 113 of the first support base 11 and the receiving hole 154 on the extension member 15 are coaxial. There are various models of mounting pins, and the lengths of the mounting pins of different models are different. When disassembling a longer outer pin, the extension piece 15 can be connected to the first support base 11 so that the receiving hole 154 and the first receiving groove 113 can cooperate to receive the outer pin, ensuring that the outer pin can be completely detached from the mounting lug of the engine rear mounting point.

[0070] Optionally, the end of the extension piece 15 with the fifth abutment surface 152 is also provided with a second positioning pin 155, which is used to insert into a threaded hole on the engine. When the extension piece 15 is used to extend the first support base 11, the second positioning pin 155 is inserted into the threaded hole on the engine to achieve positioning between the extension piece 15 and the engine rear mounting lug, preventing the extension piece 15 from sliding along the side of the engine rear mounting lug.

[0071] During the process of removing the inner pin of the mounting pin on the upper part of the engine rear lifting point, the inner pin may sometimes come out together with the outer pin. Because the inner and outer pins will stick together as the anti-seize agent ages during long-term operation on the engine, it is extremely difficult to separate the inner and outer pins.

[0072] like Figure 12 - Figure 16As shown, based on the above reasons, the engine rear mounting pin removal tool provided in this embodiment also includes a second removal component 2. The second removal component 2 includes a base plate 21, a removal cylinder 22, a hook block 23, and a puller 28. The bottom end of the removal cylinder 22 is fixed to the base plate 21. The upper end of the removal cylinder 22 is provided with a removal hole 221 extending along the height direction of the removal cylinder 22. The lower part of the removal hole 221 is provided with a support part 222 for supporting the outer pin. The support part 222 is fixed to the removal cylinder 22. The support part 222 is provided with a third connecting hole 2221. The base plate 21 is provided with a fourth connecting hole 211. The third connecting hole 2221, the fourth connecting hole 211, and the removal hole 221 are coaxially arranged. The diameter of the removal hole 221 is not less than the outer diameter of the outer pin. The diameters of the third connecting hole 2221 and the fourth connecting hole 211 are not less than the outer diameter of the inner pin and are less than the outer diameter of the outer pin. When separating the outer pin and the inner pin, the mounting pin is placed on the support 222, which supports the bottom end face of the outer pin, and the projection of the inner pin in the vertical direction is located in the third connecting hole 2221.

[0073] The puller 28 includes a connector 281, a jaw assembly 282, and a second screw 283. The second screw 283 passes through the middle of the connector 281 along its length and is threadedly connected to the connector 281. The top and bottom ends of the second screw 283 are exposed outside the connector 281. The outer diameter of the bottom end of the second screw 283 is smaller than the inner diameter of the outer pin. The jaw assembly 282 includes two jaws 2821, both of which are connected to the connector 281. The two jaws 2821 are located on both sides of the second screw 283. The jaws 2821 can slide along the length of the connector 281 to approach or move away from the second screw 283. The bottom end of each jaw 2821 is provided with a hook portion 28211. Both sides of the disassembly cylinder 22 are provided with hook blocks 23 for the hook portions 28211 to hook.

[0074] Optionally, the end of the hook block 23 away from the disassembly cylinder 22 is provided with a limiting groove 231 extending axially parallel to the disassembly hole 221. The limiting groove 231 is used to accommodate the gripper 2821 when the hook part 28211 is hooked onto the hook block 23.

[0075] Optionally, the engine rear mounting pin removal tool provided in this embodiment also includes a second top block 24. One end of the second top block 24 is provided with a groove 241 for the second screw 283 to extend into, and the other end of the second top block 24 is used to abut against the end face of the inner pin.

[0076] Optionally, the puller 28 also includes a drive rod 284. The top end of the second screw 283 has a fifth connecting hole, into which the drive rod 284 can be inserted. The axial direction of the fifth connecting hole is perpendicular to the axis of the second screw 283, allowing the drive rod 284 to turn the second screw 283, causing it to rotate relative to the connector 281. Since the second screw 283 and the connector 281 are threadedly connected, the second screw 283 will also move relative to the connector 281 along its axial direction while rotating relative to the connector 281. Furthermore, when separating the inner and outer pins, the drive rod 284 drives the second screw 283 to move along its own axis, allowing the bottom end of the second screw 283 to press against the inner pin and disengage it from the outer pin via the second top block 24.

[0077] Optionally, the second disassembly assembly 2 further includes a plurality of reinforcing ribs 25 spaced circumferentially along the disassembly cylinder 22, and each reinforcing rib 25 connects the disassembly cylinder 22 to the base plate 21. The reinforcing ribs 25 are welded and fixed to the disassembly cylinder 22 and to the base plate 21.

[0078] Optionally, a handle 26 is fixedly provided on the base plate 21, and handles 26 are provided on both sides of the disassembly cylinder 22 to facilitate the movement of the second disassembly component 2.

[0079] Optionally, a second inner sleeve 27 is also provided inside the disassembly cylinder 22. The second inner sleeve 27 is coaxially arranged with the disassembly cylinder 22. The second inner sleeve 27 is made of copper. The copper inner sleeve is relatively soft. By having the soft second inner sleeve 27 contact the outer wall of the outer pin, the risk of damage to the outer pin can be reduced.

[0080] The specific process of separating the outer pin and the inner pin using the second disassembly component 2 in this embodiment is as follows:

[0081] First, soak the inseparable domestic and export assembly in a loosening agent for 30 minutes.

[0082] Gently insert the inner and outer pin assembly into the disassembly hole 221 of the disassembly cylinder 22, and then press the second top block 24 onto the center of the top of the inner pin.

[0083] Insert the bottom end of the second screw 283 into the groove 241 at the top of the second top block 24. Move the two jaws 2821 of the jaw assembly 282 of the puller 28 so that the two jaws 2821 are close to the disassembly cylinder 22, and then the hook parts 28211 of the two jaws hook onto the two hook blocks 23 on the disassembly cylinder 22 respectively. At this time, the lower ends of the two jaws 2821 are located in the limiting groove 231, so that the two jaws 2821 will not rotate with the second screw 283. Use the drive rod 284 to gradually turn the second screw 283 until the inner pin is completely pushed into the bottom plate 21, so that it is separated from the outer pin.

[0084] Remove the puller 28, take out the outer pin, then raise the base plate 21 and take out the inner pin.

[0085] The engine rear mounting pin removal tool provided in this embodiment removes the outer pin from the engine rear mounting point by slowly pulling it out in a spiral motion, avoiding violent disassembly and damage to the outer pin, while also saving considerable time. Similarly, when separating the inner and outer pins, a spiral motion is used to slowly press the inner pin out of the outer pin, again avoiding violent disassembly and damage to both, while also saving considerable time. During the conversion of spiral motion to linear motion, the driving torque is amplified by a tool such as the drive rod 284, thus amplifying the force and making it relatively easy to pull and press out the mounting pin. The engine rear mounting pin removal tool provided in this embodiment is simple to use and highly reliable.

[0086] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A tool for removing an engine rear mounting pin, the mounting pin comprising an outer pin and an inner pin, the outer pin having an inner hole, the inner pin being inserted into the inner hole of the outer pin, characterized in that, The first disassembly assembly includes a first support base, a first top block, a first pulling member, and a nut. One end of the first support is provided with a first abutting surface, and the other end is provided with a second abutting surface. The first support is provided with a first receiving groove for accommodating the outer pin at the end of the first support with the first abutting surface, and a first communicating hole connecting the second abutting surface and the first receiving groove at the end of the first support with the second abutting surface. The first receiving groove and the first communicating hole are coaxially arranged. The first top block includes an insertion part and an abutment part. The insertion part is used to insert into the inner hole of the outer pin, and the abutment part is used to abut against the end face of the outer pin. The first top block is provided with a second connecting hole that penetrates the insertion part and the abutment part. The first pulling member includes a first screw and a first pulling cap fixed to one end of the first screw. The first screw can pass through the first connecting hole and the second connecting hole. The pulling cap is used to abut against the end of the abutting part away from the insertion part. The nut is used for threaded connection with the first screw, and one end of the nut is provided with a third abutment surface for abutting against the second abutment surface.

2. The engine rear lifting point mounting pin disassembly tool according to claim 1, characterized in that, A first positioning pin is fixedly provided on the first abutting surface. The axis of the first positioning pin is parallel to the axis of the first receiving groove. The first positioning pin is used to insert into the threaded hole on the engine.

3. The engine rear lifting point mounting pin disassembly tool according to claim 2, characterized in that, The first disassembly assembly further includes an extension member, one end of which is provided with a fourth abutment surface and the other end with a fifth abutment surface. The end of the extension member with the fourth abutment surface is also provided with a first pin hole for accommodating the first positioning pin. The extension member is also provided with a receiving hole connecting the first abutment surface and the second abutment surface. The receiving hole is used to accommodate the outer pin, and the diameter of the receiving hole is equal to the inner diameter of the first receiving groove.

4. The engine rear lifting point mounting pin disassembly tool according to claim 3, characterized in that, The extended member is provided with a second positioning pin at one end where the fifth abutment surface is provided. The second positioning pin is used to insert into a threaded hole on the engine.

5. The engine rear lifting point mounting pin disassembly tool according to any one of claims 1-4, characterized in that, It also includes a second disassembly assembly, which includes a base plate, a disassembly cylinder, a hook block, and a puller; The bottom end of the disassembly cylinder is fixed to the base plate. The upper end of the disassembly cylinder is provided with a disassembly hole extending along the height direction of the disassembly cylinder. The lower part of the disassembly hole is provided with a support part for supporting the outer pin. The support part is fixed to the disassembly cylinder. The support part is provided with a third connecting hole. The base plate is provided with a fourth connecting hole. The third connecting hole, the fourth connecting hole and the disassembly hole are coaxially arranged. The diameter of the disassembly hole is not less than the outer diameter of the outer pin. The diameters of the third connecting hole and the fourth connecting hole are not less than the outer diameter of the inner pin and are less than the outer diameter of the outer pin. The puller includes a connector, a jaw assembly, and a second screw. The second screw passes through the middle of the connector along its length and is threadedly connected to the connector. Both the top and bottom ends of the second screw are exposed outside the connector. The outer diameter of the bottom end of the second screw is smaller than the inner diameter of the outer pin. The jaw assembly includes two jaws, both of which are connected to the connector. The two jaws are located on opposite sides of the second screw. Each jaw can slide along the length of the connector to move closer to or further away from the second screw. The bottom end of each jaw is provided with a hook. Both sides of the disassembly cylinder are provided with hook blocks for the hooks to be hooked.

6. The engine rear lifting point mounting pin disassembly tool according to claim 5, characterized in that, The end of the hook block away from the disassembly cylinder is provided with a limiting groove extending axially parallel to the disassembly hole. The receiving groove is used to accommodate the gripper when the hook part is hooked onto the hook block.

7. The engine rear lifting point mounting pin disassembly tool according to claim 5, characterized in that, It also includes a second top block, one end of which is provided with a groove for the second screw to extend into.

8. The engine rear lifting point mounting pin disassembly tool according to claim 5, characterized in that, The puller also includes a drive rod, and the top end of the second screw is provided with a fifth connecting hole, into which the drive rod can be inserted.

9. The engine rear lifting point mounting pin disassembly tool according to claim 5, characterized in that, The second disassembly assembly also includes a plurality of reinforcing ribs spaced circumferentially along the disassembly cylinder, and the reinforcing ribs are all connected to the disassembly cylinder and the base plate.

10. The engine rear lifting point mounting pin disassembly tool according to claim 5, characterized in that, A handle is fixedly provided on the base plate, and the handle is provided on both sides of the disassembly cylinder.

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