Multipurpose drawing device and drawing method

Abstract

The invention relates to the technical field of disassembly, assembly and maintenance of engine parts, in particular to a multi-purpose drawing device and a drawing method.The first aspect is that the multi-purpose drawing device comprises an electric main body structure and a telescopic supporting arm, the electric main body structure comprises a linear motor and the telescopic supporting arm, and a threaded conversion rod is arranged at the end of the linear motor; more than two telescopic supporting arms for supporting are arranged on the periphery of the threaded conversion rod in parallel; each adapter is used for disassembling one to-be-disassembled structure, one end of each adapter is provided with a universal internal threaded hole, the universal internal threaded holes are connected with threaded conversion rods in a matched mode, and the other structures of the adapters are used for being connected with the to-be-disassembled structures in a clamped mode. On the second aspect, the invention further discloses a drawing method based on the multipurpose drawing device. According to the multi-purpose drawing device and the drawing method, the electric main body structure and a plurality of adapters are adopted, so that the disassembly work of various to-be-disassembled structures can be efficiently completed without damaging a peripheral structure.

Description

Technical Field

[0001] The invention relates to the technical field of disassembly, assembly and maintenance of engine parts, and in particular to a multi-purpose pulling device and a pulling method. Background Art

[0002] At present, in the trial production and verification, repair, replacement, disassembly, assembly and maintenance of automobile engine cylinder blocks and cylinder heads, we often encounter various structures to be disassembled, which require special pulling mechanisms to assist in the work, such as: disassembly of the gearbox gearshift flexible shaft retaining ring, disassembly of the engine cylinder liner, disassembly of the cylinder oil pump annular bearing, disassembly of the cylinder head injector sleeve, disassembly of the cylinder block and cylinder head bowl plug, disassembly of the cylindrical pin and butterfly pin, etc. Since there is no special pulling mechanism, the work efficiency and quality are greatly affected.

[0003] In the related art, the disassembly methods of various structures to be disassembled are as follows: when disassembling the retaining spring, it is generally disassembled by force using tools such as a crowbar, a flat head screwdriver or a hammer; when disassembling the cylinder liner, it is generally knocked out from the reverse side of the cylinder body using a copper hammer; when disassembling the bearing shell, it is generally removed after being cut and destroyed; when disassembling the injector sleeve, it is also generally removed by destructive means; when disassembling the bowl plug, it is generally welded with a stud in the middle, and then removed by forceful pulling and destruction; and when disassembling the cylindrical pin and cotter pin, it is also generally removed by force using various tools manually.

[0004] However, the disadvantages of traditional disassembly methods are as follows:

[0005] For the removal of retaining rings, it is very laborious to operate in narrow areas, which greatly damages the appearance quality of the product. The retaining rings that are removed by force often fall into the gaps between the engine parts, making them difficult to remove. For the removal of cylinder sleeves, copper hammers often cause certain damage to the appearance quality of the cylinder sleeves, and the operator consumes a lot of physical strength, which poses a safety risk. For the removal of bearings, it is easy to cut the oil pump hole wall during cutting, and in special scenarios such as data measurement and analysis, the complete bearing needs to be removed, and cutting cannot be performed. For the removal of injector sleeves, destructive removal is easy to damage the cylinder head hole wall, making it easy for coolant to leak into the combustion chamber or oil channel during reassembly, causing the engine to be scrapped. For the removal of bowl plugs, when welding studs on the bowl plugs, there is a grounding, ignition and burning phenomenon on the vehicle electrical system and the rotating parts of the engine's precision machinery, which may cause internal injuries between the parts of various parts of the engine. For the removal of cylindrical pins and cotter pins, there are many types of parts, and a disassembly tool is required for each type of part to be removed, which is very inconvenient to use. Summary of the invention

[0006] The present application provides a multi-purpose pulling device and a pulling method, which adopt an electric main structure and a plurality of conversion heads, and can efficiently complete the disassembly work of various forms of structures to be disassembled without damaging the surrounding structures.

[0007] In a first aspect, an embodiment of the present application provides a multi-purpose pulling device, comprising:

[0008] The electric main structure includes a linear motor and a telescopic support arm, wherein a thread conversion rod is arranged at the end of the linear motor, and two or more telescopic support arms for support are arranged in parallel around the thread conversion rod;

[0009] There are multiple adapters, each of which is used to disassemble a structure to be disassembled. A universal internal threaded hole is set at one end of each adapter, and the universal internal threaded hole matches the threaded conversion rod. The remaining structure of the adapter is used to clamp and connect the structure to be disassembled.

[0010] In combination with the first aspect, in one embodiment, the plurality of adapters include a circlip disassembly conversion head, and the circlip disassembly conversion head is used to disassemble the flexible shaft circlip;

[0011] The retaining spring disassembly conversion head includes a U-shaped retaining spring joint and a nut column with a universal internal threaded hole, and the U-shaped retaining spring joint is fixedly connected to the nut column; magnets are provided on two retaining feet of the U-shaped retaining spring joint, and the magnets are used to adsorb the side faces of the flexible shaft retaining spring; the U-shaped retaining spring joint also includes a retaining groove, and the retaining groove is used to match the flange of the flexible shaft retaining spring.

[0012] In combination with the first aspect, in one embodiment, the plurality of adapters include a bearing bush and cylinder sleeve disassembly conversion head, the bearing bush and cylinder sleeve disassembly conversion head includes a nut column with the universal internal threaded hole, a long connecting rod and a drag head; one end of the long connecting rod is coaxially connected to the nut column, and the other end is hinged to the center of the drag head;

[0013] The periphery of the drag head is provided with an arc-shaped edge matching the inner hole of the bearing bush or the cylinder sleeve, and the arc-shaped edge is provided with a stepped groove, and the stepped groove is used to accommodate the side wall of the bearing bush or the cylinder sleeve.

[0014] In combination with the first aspect, in one embodiment, the plurality of adapters include a straight handle adapter and a hook disassembly adapter;

[0015] The straight handle conversion head comprises a nut column with the universal internal threaded hole and a threaded rod coaxially connected to the nut column, and the threaded rod is used to match the cylindrical pin to be disassembled;

[0016] The hook disassembly conversion head comprises a nut column and a hook on which the universal internal threaded hole is arranged, and the hook is used for hooking a cotter pin to be disassembled.

[0017] In combination with the first aspect, in one embodiment, the multiple adapters include a bowl-tube disassembly conversion head, the bowl-tube disassembly conversion head includes an expansion sleeve, a special screw and an extrusion nut; the universal internal threaded hole is located at one end of the special screw; and a truncated cone nut is provided at the other end of the special screw;

[0018] The expansion sleeve is sleeved on the special screw, and a section of the expansion sleeve adjacent to the conical nut is radially bifurcated into more than two parts, and a raised tooth is provided at the end of the bifurcated expansion sleeve; the end of the expansion sleeve where the raised tooth is located is used to insert into the injector sleeve or the bowl-shaped plug; the extrusion nut is threadedly connected to the special screw, and the end face of the expansion sleeve adjacent to the conical nut is away from the conical nut. The extrusion nut is tightened relative to the special screw and squeezes the bifurcated expansion sleeve through the conical nut, and grasps the inner wall of the injector sleeve or the bowl-shaped plug through the raised teeth.

[0019] In combination with the first aspect, in one embodiment, the bowl-tube disassembly conversion head is divided into an injector sleeve disassembly conversion head and a bowl-shaped plug disassembly conversion head;

[0020] The universal internal threaded hole of the injector sleeve disassembly conversion head is provided with the end of the special screw; the truncated cone nut in the initial state is located outside the end where the raised teeth of the expansion sleeve of the injector sleeve disassembly conversion head are located;

[0021] A portion of the extrusion nut of the bowl-shaped plug removal conversion head is threadedly connected to a special screw, and the other portion is arranged outward and includes a universal internal threaded hole; the truncated cone nut in the initial state is wrapped by the end where the raised teeth of the expansion sleeve of the bowl-shaped plug removal conversion head are located.

[0022] In a second aspect, an embodiment of the present application provides a drawing method based on the above-mentioned multi-purpose drawing device, comprising the following steps:

[0023] According to the structure to be disassembled, a corresponding adapter is selected, and the thread conversion rod is connected with the universal internal thread hole of the adapter;

[0024] The adapter is docked and clamped to the structure to be disassembled;

[0025] Adjust all telescopic support arms so that they can stably support the surrounding structure;

[0026] The linear motor is turned on, and the linear motor pulls the structure to be disassembled outward through the threaded conversion rod and the adapter.

[0027] In combination with the second aspect, in one embodiment, the multiple adapters include a circlip disassembly conversion head, the circlip disassembly conversion head includes a U-shaped card joint and a nut column provided with the universal internal threaded hole, the U-shaped card joint is fixedly connected to the nut column; two card feet of the U-shaped card joint are provided with magnets, and the magnets are used to absorb the side of the flexible shaft circlip; the U-shaped card joint also includes a card slot, and the card slot is used to match the flange of the flexible shaft circlip;

[0028] The step of docking the adapter and clamping the structure to be disassembled comprises:

[0029] The flange of the flexible shaft retaining spring is inserted into the retaining groove of the U-shaped retaining joint, and the magnet is tightly attached to the side surface of the flexible shaft retaining spring.

[0030] In combination with the second aspect, in one embodiment, the plurality of adapters include a bearing bush and cylinder sleeve disassembly conversion head, the bearing bush and cylinder sleeve disassembly conversion head includes a nut column with the universal internal threaded hole, a long connecting rod and a drag head; one end of the long connecting rod is coaxially connected to the nut column, and the other end is hinged to the center of the drag head;

[0031] The periphery of the drag head is provided with an arc-shaped edge matching the inner hole of the bearing bush or the cylinder sleeve, and the arc-shaped edge is provided with a stepped groove, and the stepped groove is used to accommodate the side wall of the bearing bush or the cylinder sleeve; the step of docking the adapter with the structure to be disassembled includes:

[0032] Adjust the angle between the drag head and the long connecting rod to an acute angle and penetrate into the bottom of the cylinder sleeve;

[0033] Adjust the angle of the tractor head and engage the stepped groove with the cylinder sleeve wall.

[0034] In combination with the second aspect, in one embodiment, the multiple adapters include a bowl tube disassembly conversion head, and the bowl tube disassembly conversion head includes an expansion sleeve, a special screw and an extrusion nut; the universal internal threaded hole is located at one end of the special screw; a truncated cone nut is provided at the other end of the special screw; the expansion sleeve is sleeved on the special screw, and a section of the expansion sleeve adjacent to the truncated cone nut is radially bifurcated into more than two parts, and a protruding tooth is provided at the end of the bifurcated expansion sleeve; the extrusion nut is threadedly connected to the special screw, and is adjacent to the end face of the expansion sleeve away from the truncated cone nut;

[0035] The step of docking the adapter and clamping the structure to be disassembled comprises:

[0036] The end of the expansion sleeve where the raised teeth are located is inserted into the injector sleeve or the bowl-shaped plug;

[0037] The extrusion nut is tightened relative to the special screw rod, and the bifurcated expansion sleeve is squeezed through the truncated cone nut, so that the raised teeth grasp the inner wall of the injector sleeve or the bowl-shaped plug.

[0038] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0039] 1. The multi-purpose pulling device of the present application can complete the disassembly of various forms of structures to be disassembled through an electric main structure and a variety of adapters; when the adapter is clamped and connected to the structure to be disassembled, the lengths of all the telescopic support arms are adjusted so that the telescopic support arms are against the peripheral structures of the structure to be disassembled, and the movement direction of the linear motor of the electric main structure is exactly the pulling direction, and then the linear motor is turned on to pull the structure to be disassembled outward. Compared with the traditional disassembly method of various forms of structures to be disassembled, the pulling device of the present application has diversified uses and can be used for various forms of structures to be disassembled. Secondly, the disassembly is efficient. More importantly, while completing the disassembly work, it can not damage the surrounding structures and is easy to use.

[0040] 2. The multi-purpose pulling device of the present application can adopt a specially set retaining spring disassembly conversion head for the flexible shaft retaining spring, and connect the nut column of the retaining spring disassembly conversion head to the threaded conversion rod of the electric main structure to complete the fixing of the adapter; then insert the flange of the flexible shaft retaining spring into the slot of the U-shaped retaining joint, and adsorb the magnet on the side of the flexible shaft retaining spring. The peripheral structure supported by the flexible shaft retaining spring is supported by the telescopic support arm, and then the linear motor is used for strong pulling to forcefully pull out the flexible shaft retaining spring. More importantly, after pulling out, the magnet still adsorbs the flexible shaft retaining spring, which solves the technical problem of the retaining spring falling into the gap between the engine parts after being pulled out and is difficult to remove.

[0041] 3. The multi-purpose pulling device of the present application can use the nut column of the bearing and cylinder sleeve disassembly conversion head to connect the threaded conversion rod of the electric main structure, and the drag head directly extends into the bottom of the bearing or cylinder sleeve to be removed, and the stepped groove of the arc edge just accommodates the side wall of the bearing or cylinder sleeve, and the diameter corresponding to the arc edge of the drag head is slightly smaller than the mounting hole of the bearing or cylinder sleeve; after the telescopic support arm is supported and stabilized, the linear motor provides power, and the bearing and cylinder sleeve disassembly conversion head can be used to pull the bearing or cylinder sleeve from the bottom from the inside to the outside, and the disassembly work is completed efficiently. More importantly, there is no damage to the bearing or cylinder sleeve, as well as the inner wall of the mounting hole, and the disassembly is efficient and of high quality.

[0042] 4. The multi-purpose pulling device of the present application can match the cylindrical pin to be disassembled with a straight handle conversion head, and can also use a bent hook disassembly conversion head to hook the cotter pin to be disassembled. After the nut column is connected to the threaded conversion rod of the electric main structure, the linear motor provides power, which can efficiently complete the disassembly of the cylindrical pin and the cotter pin. More importantly, there is no damage to the bearing or cylinder sleeve, as well as the inner wall of the mounting hole, and the disassembly is efficient and high-quality.

[0043] 5. The multi-purpose pulling device of the present application comprises a bowl tube disassembly conversion head, which cleverly matches an expansion sleeve, a special screw and an extrusion nut. The end of the expansion sleeve where the raised teeth are located is used to insert into the injector sleeve or the bowl-shaped plug. When the extrusion nut is tightened relative to the special screw, the end of the expansion sleeve where the raised teeth are located is squeezed by the cone nut and will open radially. The raised teeth grasp the inner wall of the injector sleeve or the bowl-shaped plug, and then the injector sleeve or the bowl-shaped plug can be directly pulled out under the action of the linear motor, which can efficiently complete the disassembly of the injector sleeve or the bowl-shaped plug without damaging the mounting hole of the injector sleeve or the bowl-shaped plug, and the disassembly quality is high.

[0044] 6. The pulling method of the present application is simple and efficient. It only requires selecting the corresponding adapter according to the structure to be dismantled, and then docking and clamping the adapter with the structure to be dismantled, and then adjusting all the telescopic support arms to achieve a stable support effect. After that, the linear motor is turned on, and the structure to be dismantled is pulled out through the threaded conversion rod and the adapter. The disassembly is efficient, and various structures to be dismantled can be dismantled, and it is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 A schematic diagram of the structure of the electric main body provided in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of one direction of disassembling a conversion head of a clip provided in an embodiment of the present application;

[0048] Figure 3 A schematic diagram of another direction of disassembling the adapter head of the clip provided in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of the application of a multi-purpose pulling device with a clip removal conversion head provided in an embodiment of the present application for pulling a flexible shaft clip;

[0050] Figure 5 A schematic diagram of a bearing and cylinder sleeve disassembly conversion head in one direction provided in an embodiment of the present application;

[0051] Figure 6 A schematic diagram of another direction of the bearing and cylinder sleeve disassembly conversion head provided in an embodiment of the present application;

[0052] Figure 7A schematic diagram of the application of a multi-purpose pulling device with a bearing sleeve cylinder sleeve disassembly conversion head provided in an embodiment of the present application to pull a cylinder sleeve;

[0053] Figure 8 A schematic diagram of a straight handle conversion head in one direction provided by an embodiment of the present application;

[0054] Fig. 9 A schematic diagram of another direction of the straight handle conversion head provided in an embodiment of the present application;

[0055] Fig.10 A schematic diagram of the application of a multi-purpose pulling device with a straight handle conversion head provided in an embodiment of the present application for pulling a cylindrical pin;

[0056] Fig.11 A schematic diagram of the structure of a fuel injector sleeve disassembly conversion head provided in an embodiment of the present application;

[0057] Fig.12 It is a structural schematic diagram of the injector sleeve;

[0058] Fig.13 A schematic diagram of a first expansion sleeve of a fuel injector sleeve disassembly conversion head provided in an embodiment of the present application;

[0059] Fig.14 A schematic diagram of a first specially made screw rod of a fuel injector sleeve disassembly conversion head provided in an embodiment of the present application;

[0060] Fig.15 A schematic diagram of the structure of a bowl-shaped plug disassembly conversion head provided in an embodiment of the present application;

[0061] Fig.16 A schematic diagram of the application of a multi-purpose pulling device with a bowl-shaped plug removal conversion head provided in an embodiment of the present application to pull a bowl-shaped plug;

[0062] Fig.17 A schematic diagram of the structure of a hook disassembly conversion head provided in an embodiment of the present application;

[0063] Fig.18 A schematic diagram of the application of a multi-purpose pulling device with a hook disassembly conversion head provided in an embodiment of the present application to pull a cotter pin;

[0064] In the figure: 100, electric main structure; 1, quick-change battery; 2, linear motor; 3, telescopic support arm; 4, thread conversion rod; 5, handle; 200, universal internal thread hole;

[0065] 21. Flexible shaft retaining spring; 22. Cylinder sleeve; 23. Split pin; 24. Cylindrical pin; 25. Injector sleeve; 26. Bowl-shaped plug;

[0066] 6. Circlip disassembly conversion head; 61. U-shaped card connector; 611. Card slot; 612. Magnet;

[0067] 7. Bearing and cylinder sleeve disassembly conversion head; 71. Long connecting rod; 72. Tractor head; 721. Step groove;

[0068] 8. Straight handle conversion head; 81. Threaded rod;

[0069] 9. Injector sleeve disassembly conversion head; 91. First expansion sleeve; 92. First special screw; 93. First extrusion nut; 911. First raised tooth;

[0070] 10. Disassembly conversion head of bowl-shaped plug; 101. Second expansion sleeve; 102. Second special screw; 103. Second extrusion nut; 1011. Second raised tooth;

[0071] 11. Bend the hook to disassemble the conversion head; 111. Bend the hook. DETAILED DESCRIPTION

[0072] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0073] The present application provides a multi-purpose pulling device, which adopts an electric main structure and multiple conversion heads for flexible switching; by matching different conversion heads with the electric main structure, it can efficiently complete the disassembly work of various forms of structures to be disassembled without damaging the surrounding structures.

[0074] In a first aspect, the present application discloses an embodiment of a multi-purpose pulling device, which includes an electric main structure 100 and a variety of adapters.

[0075] Among them, Figure 1 As shown, the electric main structure 100 includes a linear motor 2 and a telescopic support arm 3. A threaded conversion rod 4 is provided at the end of the linear motor 2. Two or more telescopic support arms 3 for support are provided in parallel around the threaded conversion rod 4. The threaded conversion rod 4 is used to connect a variety of adapters. The telescopic support arm 3 is used to support the surrounding structure, so that the electric main structure 100 can easily pull out the structure to be disassembled through the adapter.

[0076] There are a variety of adapters, each of which is used to disassemble a structure to be disassembled. Each adapter includes a universal connecting nut end, the universal connecting nut is used to match and connect with the thread conversion rod 4 threads, and the remaining structure of the adapter is used to clamp and connect the structure to be disassembled.

[0077] The multi-purpose pulling device of the present application can complete the disassembly work of various forms of structures to be disassembled through an electric main structure 100 and a variety of adapters; when the adapter is clamped and connected to the structure to be disassembled, the lengths of all the telescopic support arms 3 are adjusted so that the telescopic support arms 3 are against the peripheral structure of the structure to be disassembled, and the movement direction of the linear motor 2 of the electric main structure 100 is exactly the pulling direction, and then the linear motor is turned on to pull the structure to be disassembled outward. Compared with the traditional disassembly method of various forms of structures to be disassembled, the pulling device of the present application has diversified uses and can be used for various forms of structures to be disassembled. Secondly, the disassembly is efficient. More importantly, while completing the disassembly work, it can not damage the surrounding structure and is easy to use.

[0078] like Figure 1 As shown, the electric main structure 100 includes a quick-change battery 1 and a handle 5. The quick-change battery 1 supplies power to the linear motor 2. The handle 5 is arranged around the linear motor 2 for easy holding. At the same time, a switch of the linear motor 2 is arranged on the handle 5. The electric main structure 100 also includes a rectangular support plate. The threaded conversion rod 4 vertically penetrates the center of the rectangular support plate, and more than two telescopic support arms 3 for support also vertically penetrate the rectangular support plate. The telescopic support arms 3 can be extended and retracted relative to the rectangular support plate to reach a stable support position.

[0079] like Figure 2 , Figure 3 and Figure 4 As shown, further, in one embodiment, the various adapters include a retaining spring disassembly conversion head 6, and the retaining spring disassembly conversion head 6 is used to disassemble the flexible shaft retaining spring 21, especially for the flexible shaft retaining spring 21 of the gearbox shifting.

[0080] Specifically, the flexible shaft retaining spring 21 includes two retaining pins and a plate body connecting the retaining pins, and a U-shaped notch is formed between the two retaining pins. The plate body is provided with a flange, and the U-shaped notch of the flexible shaft retaining spring 21 is provided with a tubular structure.

[0081] The clamping spring disassembly conversion head 6 comprises a U-shaped clamping joint 61 and a nut column with a universal internal threaded hole 200 , and the U-shaped clamping joint 61 is fixedly connected to the nut column. The nut column is connected to the center of the end surface of the U-shaped clamping joint 61 .

[0082] The two clamping feet of the U-shaped clamping joint 61 are provided with magnets 612, which are used to absorb the side of the flexible shaft clamping spring 21, so as to facilitate positioning and clamping. More importantly, it can effectively prevent the clamping spring from falling into the gap between the engine parts after pulling and making it difficult to remove. The U-shaped clamping joint 61 also includes a clamping groove 611, which is used to match the flange of the flexible shaft clamping spring 21, so that the pulling force is stable.

[0083] The multi-purpose pulling device of the present application can adopt a specially set retaining spring disassembly conversion head 6 for the flexible shaft retaining spring 21, and connect the nut column of the retaining spring disassembly conversion head 6 to the threaded conversion rod 4 of the electric main structure 100 to complete the fixing of the adapter; then insert the flange of the flexible shaft retaining spring 21 into the slot 611 of the U-shaped retaining joint 61, and the magnet 612 is adsorbed on the side of the flexible shaft retaining spring 21. The peripheral structure supported by the flexible shaft retaining spring 21 is supported by the telescopic support arm 3, and then the linear motor 2 is used for strong pulling, so that the flexible shaft retaining spring 21 can be forcefully pulled out. More importantly, after being pulled out, the magnet 612 still adsorbs the flexible shaft retaining spring 21, which solves the technical problem that the retaining spring falls into the gap between the engine parts after being pulled out and is difficult to remove.

[0084] like Figure 5 , Figure 6 and Figure 7 As shown, further, in one embodiment, the multiple adapters include a bearing sleeve disassembly conversion head 7, which is used to disassemble the engine cylinder sleeve and the cylinder oil pump annular bearing sleeve. Specifically, the engine cylinder sleeve is a tubular structure, and the cylinder oil pump annular bearing sleeve is a thin plate ring structure.

[0085] The bearing and cylinder sleeve disassembly conversion head 7 also includes a nut column with a universal internal threaded hole 200, a long connecting rod 71 and a drag head 72; the drag head 72 is a plate-like structure, one end of the long connecting rod 71 is coaxially connected to the nut column, and the other end is hinged to the center of the drag head 72.

[0086] The periphery of the drag head 72 is provided with an arc-shaped edge matching the inner hole of the bearing bush or the cylinder sleeve 22 , and the arc-shaped edge is provided with a stepped groove 721 , and the stepped groove 721 is used to accommodate the side wall of the bearing bush or the cylinder sleeve 22 .

[0087] The multi-purpose pulling device of the present application can use the nut column of the bearing and cylinder sleeve disassembly conversion head 7 to connect the threaded conversion rod 4 of the electric main structure 100, and the drag head 72 directly extends into the bottom of the bearing or cylinder sleeve to be removed, and the stepped groove 721 of the arc edge just accommodates the side wall of the bearing or cylinder sleeve 22, and the diameter corresponding to the arc edge of the drag head 72 is slightly smaller than the mounting hole of the bearing or cylinder sleeve; after the telescopic support arm 3 is supported and stabilized, the linear motor 2 provides power, and the bearing and cylinder sleeve disassembly conversion head 7 can be used to pull the bearing or cylinder sleeve from the bottom from the inside to the outside, and the disassembly work is completed efficiently. More importantly, there is no damage to the bearing or cylinder sleeve, as well as the inner wall of the mounting hole, and the disassembly is efficient and of high quality.

[0088] Furthermore, in one embodiment, the multiple adapters include a straight handle adapter 8 and a hook disassembly adapter 11 .

[0089] like Figure 8 , Fig. 9 and Fig.10As shown, the straight handle conversion head 8 includes a nut column with a universal internal threaded hole 200 and a threaded rod 81 coaxially connected to the nut column, and the threaded rod 81 is used to match the cylindrical pin 24 to be disassembled.

[0090] like Fig.17 and Fig.18 As shown, the hook disassembly conversion head 11 includes a nut column with a universal internal threaded hole 200 and a hook 111, and the hook 111 is used to hook the cotter pin 23 to be disassembled.

[0091] The multi-purpose pulling device of the present application can match the cylindrical pin 24 to be disassembled with the straight handle conversion head 8, and can also use the bent hook disassembly conversion head 11 to hook the cotter pin 23 to be disassembled. After the nut column is connected to the threaded conversion rod 4 of the electric main structure 100, the linear motor 2 provides power, and can efficiently complete the disassembly of the cylindrical pin 24 and the cotter pin 23. More importantly, there is no damage to the bearing or cylinder sleeve, as well as the inner wall of the mounting hole, and the disassembly is efficient and high-quality.

[0092] Furthermore, in one embodiment, the various adapters include a bowl-tube disassembly conversion head, which is used to disassemble the injector sleeve 25 or the bowl-shaped plug 26 .

[0093] The bowl tube disassembly conversion head comprises an expansion sleeve, a special screw and an extrusion nut. The universal internal threaded hole 200 is arranged at one end of the special screw, and a frustum nut is arranged at the other end of the special screw.

[0094] The expansion sleeve is sleeved on the special screw, and a section of the expansion sleeve adjacent to the truncated cone nut is forked in two or more parts in the radial direction, and a protruding tooth is provided at the end of the forked expansion sleeve. The end of the expansion sleeve where the protruding tooth is located is used to insert into the injector sleeve 25 or the bowl-shaped plug 26. The extrusion nut is threadedly connected to the special screw, and the end face adjacent to the expansion sleeve is away from the truncated cone nut. The extrusion nut is tightened relative to the special screw and squeezes the forked expansion sleeve through the truncated cone nut, and the inner wall of the injector sleeve 25 or the bowl-shaped plug 26 is grasped by the protruding teeth.

[0095] The multi-purpose pulling device of the present application comprises a bowl tube disassembly conversion head, which cleverly matches an expansion sleeve, a special screw and an extrusion nut. The end where the raised teeth of the expansion sleeve are located is used to insert into the injector sleeve 25 or the bowl-shaped plug 26. When the extrusion nut is tightened relative to the special screw, the end where the raised teeth of the expansion sleeve are located is squeezed by the truncated cone nut and will open radially. The raised teeth grasp the inner wall of the injector sleeve 25 or the bowl-shaped plug 26. Then, under the action of the linear motor 2, the injector sleeve 25 or the bowl-shaped plug 26 can be directly pulled out, which can efficiently complete the disassembly of the injector sleeve 25 or the bowl-shaped plug 26 without damaging the mounting hole of the injector sleeve 25 or the bowl-shaped plug 26, and the disassembly quality is high.

[0096] Furthermore, in one embodiment, the bowl tube disassembly conversion head is divided into an injector sleeve disassembly conversion head 9 and a bowl plug disassembly conversion head 10. The design principles of the two conversion heads are basically the same, both of which utilize the extrusion force to expand the forked expansion sleeve, and then the raised teeth grasp the inner wall, but the structures still have subtle differences.

[0097] Specifically, the universal internal threaded hole 200 of the injector sleeve disassembly conversion head 9 is provided at the end of the special screw rod; the truncated cone nut in the initial state is located outside the end where the raised teeth of the expansion sleeve of the injector sleeve disassembly conversion head 9 are located. When squeezed, the truncated cone nut slowly drills into the inside from the outside of the end where the raised teeth of the expansion sleeve are located, and the raised teeth are stretched to grasp the inner wall of the injector sleeve 25.

[0098] The structural difference between the fuel injector sleeve 25 and the bowl-shaped plug 26 is that the length of the tubular portion of the fuel injector sleeve 25 is sufficiently long, while the length of the tubular portion of the bowl-shaped plug 26 is very short.

[0099] A part of the extrusion nut of the bowl-shaped plug removal conversion head 10 is threadedly connected to the special screw rod, and the other part is arranged outward and includes a universal internal threaded hole 200. The extrusion nut of the bowl-shaped plug removal conversion head 10 plays both an extrusion role and a connection role. The truncated cone nut in the initial state is wrapped by the end where the raised teeth of the expansion sleeve of the bowl-shaped plug removal conversion head 10 are located. When the expansion sleeve is squeezed, the special screw rod only needs to travel a small stroke, and the raised teeth can grasp the inner wall of the bowl-shaped plug 26. The inner wall of the expansion sleeve that wraps the truncated cone nut has a slope that is adapted to the truncated cone nut.

[0100] In comparison, the side wall of the expansion sleeve with raised teeth of the injector sleeve removal conversion head 9 can be relatively thicker, while the side wall of the expansion sleeve with raised teeth of the bowl-shaped plug removal conversion head 10 is set relatively thin because it needs to wrap the truncated cone nut.

[0101] The multi-purpose pulling device of the present application is divided into an injector sleeve disassembly conversion head 9 and a bowl-shaped plug disassembly conversion head 10 because the lengths of the tubular parts of the injector sleeve 25 or the bowl-shaped plug 26 are different, that is, the lengths available for the raised teeth to grasp are different. The cone nut of the injector sleeve disassembly conversion head 9 in the initial state is located outside the end where the raised teeth of the expansion sleeve of the injector sleeve disassembly conversion head 9 are located, and the cone nut of the bowl-shaped plug disassembly conversion head 10 in the initial state is wrapped by the end where the raised teeth of the expansion sleeve of the bowl-shaped plug disassembly conversion head 10 are located. The slight difference in the settings can better adapt to the two structures to be disassembled, with high disassembly efficiency and safe disassembly.

[0102] like Figure 11 to Figure 14As shown, further, the injector sleeve disassembly conversion head 9 comprises a first expansion sleeve 91, a first special screw 92 and a first extrusion nut 93, a universal internal threaded hole 200 is arranged at the top end of the special screw, and a frustum nut is arranged at the bottom end of the special screw.

[0103] The first expansion sleeve 91 is sleeved on the first special screw 92 , the conical nut at the bottom end of the first special screw 92 is exposed, the threaded portion at the top end of the first special screw 92 is exposed, and the first extrusion nut 93 is threadedly connected to the exposed threaded portion of the first special screw 92 .

[0104] A section of the first expansion sleeve 91 adjacent to the truncated cone nut is forked into more than two parts in the radial direction, and a first protruding tooth 911 is provided at the end of the forked first expansion sleeve 91. The end of the first expansion sleeve 91 where the first protruding tooth 911 is located is used to insert into the injector sleeve 25 or the bowl-shaped plug 26. The first extrusion nut 93 is threadedly connected to the first special screw 92, and is adjacent to the end face of the first expansion sleeve 91 away from the truncated cone nut. The first extrusion nut 93 is tightened relative to the first special screw 92 and squeezes the forked first expansion sleeve 91 through the truncated cone nut, and grasps the inner wall of the injector sleeve 25 or the bowl-shaped plug 26 through the first protruding tooth 911.

[0105] like Fig.15 and Fig.16 As shown, further, the bowl-shaped plug disassembly conversion head 10 includes a second expansion sleeve 101 , a second special screw 102 and a second extrusion nut 103 .

[0106] The universal internal thread hole 200 is provided at the top of the second extrusion nut 103, and the bottom of the second extrusion nut 103 is adjacent to the top of the second expansion sleeve 101. The second expansion sleeve 101 is sleeved on the second special screw 102, and the truncated cone nut at the bottom of the second special screw 102 is wrapped by the part where the second raised tooth 1011 of the second expansion sleeve 101 is located. The threaded portion at the top of the second special screw 102 is exposed, and the second extrusion nut 103 is threadedly connected to the exposed threaded portion of the second special screw 102.

[0107] A section of the second expansion sleeve 101 adjacent to the truncated cone nut is forked into more than two parts in the radial direction, and a second protruding tooth 1011 is provided at the end of the forked second expansion sleeve 101. The end of the second expansion sleeve 101 where the second protruding tooth 1011 is located is used to be inserted into the injector sleeve 25 or the bowl-shaped plug 26. The second extrusion nut 103 is tightened relative to the second special screw 102 and extrudes the forked second expansion sleeve 101 through the truncated cone nut, and grasps the inner wall of the injector sleeve 25 or the bowl-shaped plug 26 through the second protruding tooth 1011.

[0108] Furthermore, the first expansion sleeve 91 and the second expansion sleeve 101 are both divided into a large diameter section and a small diameter section, and the small diameter section is bifurcated into more than two parts along the radial direction. The wall thickness of the large diameter section is relatively thick, which enhances the stability of the entire structure. The wall thickness of the small diameter section is relatively thin, which is conducive to extrusion and expansion.

[0109] The length of the small diameter section of the first expansion sleeve 91 is slightly greater than the length of the injector sleeve. The length of the second protruding teeth 1011 of the second expansion sleeve 101 is greater than the depth of the bowl-shaped plug 26 .

[0110] In a second aspect, the present application also discloses a drawing method based on the above-mentioned multi-purpose drawing device, comprising the following steps:

[0111] According to the structure to be disassembled, the corresponding adapter is selected, and the universal internal threaded hole 200 of the adapter is used to connect the thread conversion rod 4. Specifically, if the flexible shaft retaining spring 21 is to be disassembled, the retaining spring disassembly conversion head 6 is selected. If the injector sleeve is to be disassembled, the injector sleeve disassembly conversion head 9 is selected.

[0112] Fasten the adapter to the structure to be disassembled.

[0113] All telescopic support arms 3 are adjusted so that the telescopic support arms 3 stably support the surrounding structure to achieve a stable support effect, providing a basis for subsequent pulling.

[0114] The linear motor 2 is turned on, and the linear motor 2 pulls the structure to be disassembled outwards through the threaded conversion rod 4 and the adapter.

[0115] The pulling method of the present application is simple and efficient. It only requires selecting the corresponding adapter according to the structure to be disassembled, and then docking and clamping the adapter with the structure to be disassembled, and then adjusting all the telescopic support arms 3 to achieve a stable support effect. After that, the linear motor 2 is turned on, and the structure to be disassembled is pulled outward through the threaded conversion rod 4 and the adapter. The disassembly is efficient, and various structures to be disassembled can be disassembled, and it is highly practical.

[0116] like Figure 2 , Figure 3 and Figure 4As shown, further, in one embodiment, the multiple adapters include a spring disassembly conversion head 6, and the spring disassembly conversion head 6 is used to disassemble the flexible shaft spring 21, especially for the gearbox gear-shifting flexible shaft spring 21. Specifically, the flexible shaft spring 21 includes two clamping feet and a plate body connecting the clamping feet, and a U-shaped notch is formed between the two clamping feet, and the plate body is provided with a flange, and the U-shaped notch of the flexible shaft spring 21 is provided with a tubular structure. The spring disassembly conversion head 6 includes a U-shaped clamping joint 61 and a nut column provided with a universal internal threaded hole 200, and the U-shaped clamping joint 61 is fixedly connected to the nut column. The nut column is connected to the center of the end face of the U-shaped clamping joint 61. The two clamping feet of the U-shaped clamping joint 61 are provided with magnets 612, and the magnets 612 are used to absorb the side of the flexible shaft spring 21, which is convenient for positioning and clamping. More importantly, it can effectively prevent the spring from falling into the gap between the engine parts after pulling and making it difficult to remove. The inverted U-shaped clamping joint 61 further includes a clamping groove 611, which is used to match the flange of the flexible shaft clamping spring 21, so that the pulling force is stable.

[0117] Connect the adapter to the structure to be disassembled, including:

[0118] The flange of the flexible shaft clamping spring 21 is inserted into the clamping groove 611 of the U-shaped clamping joint 61, and the magnet is tightly attached to the side surface of the flexible shaft clamping spring 21, so that a stable clamping connection is achieved.

[0119] like Figure 5 , Figure 6 and Figure 7 As shown, further, in one embodiment, the multiple adapters include a bearing sleeve disassembly conversion head 7, which is used to disassemble the engine cylinder sleeve and the cylinder oil pump annular bearing sleeve. Specifically, the engine cylinder sleeve is a tubular structure, and the cylinder oil pump annular bearing sleeve is a thin plate ring structure. The bearing sleeve disassembly conversion head 7 also includes a nut column with a universal internal threaded hole 200, a long connecting rod 71 and a drag head 72; the drag head 72 is a plate-like structure, one end of the long connecting rod 71 is coaxially connected to the nut column, and the other end is hinged to the center of the drag head 72.

[0120] The periphery of the drag head 72 is provided with an arc-shaped edge matching the inner hole of the bearing bush or the cylinder sleeve 22 , and the arc-shaped edge is provided with a stepped groove 721 , and the stepped groove 721 is used to accommodate the side wall of the bearing bush or the cylinder sleeve 22 .

[0121] Connect the adapter to the structure to be disassembled, including:

[0122] Adjust the angle between the drag head 72 and the long connecting rod 71 to an acute angle and penetrate into the bottom of the cylinder sleeve;

[0123] Adjust the angle of the drag head 72 and clamp the stepped groove to the cylinder sleeve wall.

[0124] Furthermore, in one embodiment, the various adapters include a bowl-tube disassembly conversion head, which is used to disassemble the injector sleeve 25 or the bowl-shaped plug 26 .

[0125] The bowl tube disassembly conversion head comprises an expansion sleeve, a special screw and an extrusion nut. The universal internal threaded hole 200 is arranged at one end of the special screw, and a frustum nut is arranged at the other end of the special screw.

[0126] The expansion sleeve is sleeved on the special screw, and a section of the expansion sleeve adjacent to the truncated cone nut is forked in two or more parts in the radial direction, and a protruding tooth is provided at the end of the forked expansion sleeve. The end of the expansion sleeve where the protruding tooth is located is used to insert into the injector sleeve 25 or the bowl-shaped plug 26. The extrusion nut is threadedly connected to the special screw, and the end face adjacent to the expansion sleeve is away from the truncated cone nut. The extrusion nut is tightened relative to the special screw and squeezes the forked expansion sleeve through the truncated cone nut, and the inner wall of the injector sleeve 25 or the bowl-shaped plug 26 is grasped by the protruding teeth.

[0127] Connect the adapter to the structure to be disassembled, including:

[0128] The end of the expansion sleeve where the raised teeth are located is inserted into the injector sleeve 25 or the bowl-shaped plug 26;

[0129] The extrusion nut is tightened relative to the special screw rod, and the bifurcated expansion sleeve is squeezed through the truncated cone nut, so that the raised teeth grasp the inner wall of the injector sleeve 25 or the bowl-shaped plug 26.

[0130] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0131] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0132] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A multi-purpose pulling device, characterized in that: Include: An electric main structure (100) comprises a linear motor (2) and a telescopic support arm (3), wherein a threaded conversion rod (4) is arranged at the end of the linear motor (2), and two or more telescopic support arms (3) for supporting are arranged in parallel around the threaded conversion rod (4); A plurality of adapters are provided, each adapter being used for disassembling a structure to be disassembled. A universal internal threaded hole (200) is arranged at one end of each adapter, the universal internal threaded hole (200) being matched with a threaded conversion rod (4), and the remaining structure of the adapter being used for clamping and connecting the structure to be disassembled.

2. A multi-purpose pulling device as claimed in claim 1, characterized in that: The multiple adapters include a retaining spring disassembly conversion head (6), and the retaining spring disassembly conversion head (6) is used to disassemble the flexible shaft retaining spring (21); The retaining spring disassembly conversion head (6) comprises a U-shaped retaining joint (61) and a nut column provided with the universal internal threaded hole (200), wherein the U-shaped retaining joint (61) is fixedly connected to the nut column; two retaining feet of the U-shaped retaining joint (61) are provided with magnets (612), and the magnets (612) are used to absorb the side of the flexible shaft retaining spring (21); the U-shaped retaining joint (61) also comprises a retaining groove (611), and the retaining groove (611) is used to match the flange of the flexible shaft retaining spring (21).

3. A multi-purpose pulling device as claimed in claim 1, characterized in that: The multiple adapters include a bearing bush and cylinder sleeve disassembly conversion head (7), the bearing bush and cylinder sleeve disassembly conversion head (7) including a nut column provided with the universal internal threaded hole (200), a long connecting rod (71) and a drag head (72); one end of the long connecting rod (71) is coaxially connected to the nut column, and the other end is hinged to the center of the drag head (72); The tractor head (72) is provided with an arc-shaped edge matching the inner hole of the bearing bush or the cylinder sleeve (22) at its periphery, and the arc-shaped edge is provided with a stepped groove (721), and the stepped groove (721) is used to accommodate the side wall of the bearing bush or the cylinder sleeve (22).

4. A multi-purpose pulling device as claimed in claim 1, characterized in that: The multiple adapters include a straight handle adapter (8) and a hook disassembly adapter (11); The straight handle conversion head (8) comprises a nut column on which the universal internal threaded hole (200) is arranged and a threaded rod (81) coaxially connected to the nut column, wherein the threaded rod (81) is used to match the cylindrical pin (24) to be disassembled; The hook disassembly conversion head (11) comprises a nut column provided with the universal internal threaded hole (200) and a hook (111), wherein the hook (111) is used for hooking a cotter pin (23) to be disassembled.

5. A multi-purpose pulling device as claimed in claim 1, characterized in that: The various adapters include a bowl-tube disassembly conversion head, which includes an expansion sleeve, a special screw and an extrusion nut; the universal internal threaded hole (200) is located at one end of the special screw; and a truncated cone nut is provided at the other end of the special screw; The expansion sleeve is sleeved on the special screw, and a section of the expansion sleeve adjacent to the conical nut is radially bifurcated into more than two parts, and a protruding tooth is provided at the end of the bifurcated expansion sleeve; the end of the expansion sleeve where the protruding tooth is located is used to insert into the injector sleeve (25) or the bowl-shaped plug (26); the extrusion nut is threadedly connected to the special screw, and the end face adjacent to the expansion sleeve is away from the conical nut, the extrusion nut is tightened relative to the special screw and squeezes the bifurcated expansion sleeve through the conical nut, and grasps the inner wall of the injector sleeve (25) or the bowl-shaped plug (26) through the protruding teeth.

6. A multi-purpose pulling device as claimed in claim 5, characterized in that: The bowl-tube disassembly conversion head is divided into an injector sleeve disassembly conversion head (9) and a bowl-shaped plug disassembly conversion head (10); The universal internal threaded hole (200) of the injector sleeve disassembly conversion head (9) opens the end of the special screw rod; the truncated cone nut in the initial state is located outside the end where the raised teeth of the expansion sleeve of the injector sleeve disassembly conversion head (9) are located; A portion of the extrusion nut of the bowl-shaped plug disassembly conversion head (10) is threadedly connected to a special screw rod, and the other portion is arranged outward and includes a universal internal threaded hole (200); the truncated cone nut in the initial state is wrapped by the end where the raised teeth of the expansion sleeve of the bowl-shaped plug disassembly conversion head (10) are located.

7. A drawing method based on the multi-purpose drawing device of claim 1, characterized in that: The following steps are involved: According to the structure to be disassembled, a corresponding adapter is selected, and the thread conversion rod (4) is connected with the universal internal thread hole (200) of the adapter; The adapter is docked and clamped to the structure to be disassembled; Adjusting all telescopic support arms (3) so that the telescopic support arms (3) stably support the surrounding structure; The linear motor (2) is turned on, and the linear motor (2) pulls the structure to be disassembled outwards through the threaded conversion rod (4) and the adapter.

8. The drawing method according to claim 7, characterized in that: The multiple adapters include a retaining spring disassembly conversion head (6), the retaining spring disassembly conversion head (6) includes a U-shaped retaining joint (61) and a nut column provided with the universal internal threaded hole (200), the U-shaped retaining joint (61) is fixedly connected to the nut column; two retaining feet of the U-shaped retaining joint (61) are provided with magnets (612), the magnets (612) are used to absorb the side of the flexible shaft retaining spring (21); the U-shaped retaining joint (61) also includes a retaining groove (611), the retaining groove (611) is used to match the flange of the flexible shaft retaining spring (21); The step of docking the adapter and clamping the structure to be disassembled comprises: The flange of the flexible shaft retaining spring (21) is inserted into the retaining groove (611) of the U-shaped retaining joint (61), and the magnet is closely attached to the side surface of the flexible shaft retaining spring (21).

9. The drawing method according to claim 7, characterized in that: The multiple adapters include a bearing bush and cylinder sleeve disassembly conversion head (7), the bearing bush and cylinder sleeve disassembly conversion head (7) including a nut column provided with the universal internal threaded hole (200), a long connecting rod (71) and a drag head (72); one end of the long connecting rod (71) is coaxially connected to the nut column, and the other end is hinged to the center of the drag head (72); The tractor (72) is provided with an arc-shaped edge matching the inner hole of the bearing bush or the cylinder sleeve (22) on its periphery, and the arc-shaped edge is provided with a stepped groove (721), and the stepped groove (721) is used to accommodate the side wall of the bearing bush or the cylinder sleeve (22); the step of docking the adapter with the structure to be disassembled comprises: The angle between the drag head (72) and the long connecting rod (71) is adjusted to an acute angle, and the drag head (72) is inserted into the bottom of the cylinder sleeve; The angle of the drag head (72) is adjusted, and the stepped groove is clamped to the cylinder sleeve wall.

10. The drawing method according to claim 7, characterized in that: The multiple adapters include a bowl tube disassembly conversion head, which includes an expansion sleeve, a special screw and an extrusion nut; the universal internal threaded hole (200) is located at one end of the special screw; a truncated cone nut is arranged at the other end of the special screw; the expansion sleeve is sleeved on the special screw, and a section of the expansion sleeve adjacent to the truncated cone nut is radially bifurcated into more than two parts, and a protruding tooth is arranged at the end of the bifurcated expansion sleeve; the extrusion nut is threadedly connected to the special screw, and is adjacent to the end face of the expansion sleeve away from the truncated cone nut; The step of docking the adapter and clamping the structure to be disassembled comprises: The end of the expansion sleeve where the protruding teeth are located is inserted into the injector sleeve (25) or the bowl-shaped plug (26); The extrusion nut is tightened relative to the special screw rod, and the bifurcated expansion sleeve is squeezed through the truncated cone nut, so that the raised teeth grasp the inner wall of the injector sleeve (25) or the bowl-shaped plug (26).

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