Multi-purpose drawing device and drawing method

Abstract

The application relates to the technical field of engine part dismounting and maintenance, in particular to a multipurpose pulling device and a pulling method. In the first aspect, the application provides a multipurpose pulling device, which comprises an electric main body structure, a linear motor and telescopic support arms, the end of the linear motor is provided with a threaded conversion rod, and more than two telescopic support arms for support are arranged in parallel around the threaded conversion rod; a plurality of adapters, each adapter is used for dismounting a to-be-dismounted structure, one end of each adapter is provided with a general internal thread hole matched with the threaded conversion rod, and the remaining structure of the adapter is used for clamping and connecting the to-be-dismounted structure. In the second aspect, the application further discloses a pulling method based on the above-mentioned multipurpose pulling device. The multipurpose pulling device and the pulling method can efficiently complete the dismounting work of various to-be-dismounted structures without damaging the surrounding structures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine parts disassembly and maintenance, and particularly relates to a multipurpose pulling device and a pulling method. BACKGROUND

[0002] At present, in the work of trial verification, maintenance replacement, disassembly, assembly and maintenance of automobile engine cylinder block and cylinder head parts, various structures of structures to be disassembled are often encountered, and special pulling mechanisms are needed to assist the work, such as disassembly of gearshift hanging spring, disassembly of engine cylinder liner, disassembly of cylinder block oil pump ring-shaped bearing, disassembly of cylinder head oil sprayer sleeve, disassembly of bowl-shaped plug of cylinder block and cylinder head, disassembly of cylindrical pin butterfly pin and other work scenes. Without special pulling mechanism, the work efficiency and quality are greatly affected.

[0003] In related technologies, the disassembly methods of various forms of structures to be disassembled are as follows: when disassembling the snap spring, a crowbar, a straight lever or a hammer is generally used to disassemble by force; when disassembling the cylinder liner, a copper hammer is generally used to knock out the cylinder liner from the opposite side of the cylinder block; when disassembling the bearing, it is generally taken out after cutting and damaging; when disassembling the oil sprayer sleeve, it is also generally taken out by damaging; when disassembling the bowl-shaped plug, a screw is generally welded in the middle, and then the bowl-shaped plug is taken out by force; and when disassembling the cylindrical pin split pin, it is also generally disassembled by force by using various tools.

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

[0005] For disassembly of the snap spring, it is very laborious to operate in narrow parts, and the product appearance quality is greatly damaged. The snap spring taken out by force often falls into the gap between the engine parts, and it is difficult to take out. For disassembly of the cylinder liner, the copper hammer often damages the appearance quality of the cylinder liner, the operator consumes a lot of physical strength, and there is a safety risk. For disassembly of the bearing, the oil pump hole wall is easily cut when cutting, and the complete bearing needs to be taken out in special scenes such as data measurement and analysis, and cannot be cut. For disassembly of the oil sprayer sleeve, the cylinder head hole wall is easily damaged when taken out by damaging, so that the cooling liquid leaks into the combustion chamber or oil channel when reassembled, causing the engine to be scrapped. For disassembly of the bowl-shaped plug, when the screw is welded on the bowl-shaped plug, the ground spark burning phenomenon exists in the electrical system of the whole vehicle and the precise mechanical rotating part of the engine, which may cause internal damage between the parts of the engine. For disassembly of the cylindrical pin split pin, there are many types of parts, and a disassembly tool is needed for each type of part, which is very inconvenient to use. SUMMARY

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

[0007] In a first aspect, embodiments of the present application provide a multi-purpose pulling device, comprising:

[0008] An electric main body structure, comprising a linear motor and telescopic support arms, an end of the linear motor is provided with a threaded conversion rod, and the threaded conversion rod is peripherally provided with two or more telescopic support arms for support;

[0009] A plurality of adapters, each adapter is used to disassemble a structure to be disassembled, and each adapter is provided with a general internal threaded hole at one end, the general internal threaded hole is matched with the threaded conversion rod, and the remaining structure of the adapter is used to clamp the structure to be disassembled.

[0010] In combination with the first aspect, in an embodiment, the plurality of adapters comprises a clamp spring disassembly adapter, and the clamp spring disassembly adapter is used to disassemble a soft shaft clamp spring.

[0011] The clamp spring disassembly adapter comprises a U-shaped clamping joint and a nut column provided with the general internal threaded hole, and the U-shaped clamping joint is fixedly connected to the nut column; two clamping legs of the U-shaped clamping joint are provided with magnets, and the magnets are used to attract the side surface of the soft shaft clamp spring; the U-shaped clamping joint further comprises a clamping groove, and the clamping groove is used to match the flange of the soft shaft clamp spring.

[0012] In combination with the first aspect, in an embodiment, the plurality of adapters comprises a bearing bush disassembly adapter, and the bearing bush disassembly adapter comprises a nut column provided with the general internal threaded hole, a long connecting rod, and a trailing head; one end of the long connecting rod is coaxially connected to the nut column, and the other end is hingedly connected to the center of the trailing head.

[0013] The trailing head is peripherally provided with an arc-shaped edge matched with the inner hole of the bearing or the cylinder sleeve, and the arc-shaped edge is provided with a stepped groove for accommodating the side wall of the bearing or the cylinder sleeve.

[0014] In combination with the first aspect, in an embodiment, the plurality of adapters comprises a straight handle adapter and a bent hook disassembly adapter.

[0015] The straight handle adapter comprises a nut column provided with the general 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 bent hook disassembly adapter comprises a nut column provided with the general internal threaded hole and a bent hook, and the bent hook is used to hook the split pin to be disassembled.

[0017] In combination with the first aspect, in an embodiment, the plurality of adapters comprises a bowl pipe disassembly adapter, and the bowl pipe disassembly adapter comprises an expansion sleeve, a specially designed screw rod, and a pressing nut; the general internal threaded hole is located at one end of the specially designed screw rod; and a circular truncated cone nut is provided at the other end of the specially designed screw rod.

[0018] The expansion sleeve is sleeved on the special screw, and a section of the expansion sleeve adjacent to the end surface of the conical nut is radially bifurcated into two or more parts, and the end of the bifurcated expansion sleeve is provided with a protruding tooth; the protruding tooth of the expansion sleeve is used for inserting into the oil injector sleeve or the bowl-shaped plug; the extrusion nut is threadedly connected to the special screw and is adjacent to the end surface of the expansion sleeve away from the conical nut, the extrusion nut is tightened relative to the special screw and extrudes the bifurcated expansion sleeve through the conical nut, and the protruding tooth clamps the inner wall of the oil injector sleeve or the bowl-shaped plug.

[0019] In combination with the first aspect, in an implementation, the bowl pipe dismounting adapter is divided into an oil injector sleeve dismounting adapter and a bowl-shaped plug dismounting adapter;

[0020] The universal internal threaded hole of the oil injector sleeve dismounting adapter is opened at the end of the special screw; and the conical nut in the initial state is located outside the end of the expansion sleeve of the oil injector sleeve dismounting adapter where the protruding tooth is located;

[0021] A part of the extrusion nut of the bowl-shaped plug dismounting adapter is threadedly connected to the special screw, and the other part is outwardly arranged and contains a universal internal threaded hole; and the conical nut in the initial state is wrapped by the end of the expansion sleeve of the bowl-shaped plug dismounting adapter where the protruding tooth is located.

[0022] The second aspect provides a drawing method based on the above-mentioned multi-purpose drawing device, which comprises the following steps:

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

[0024] The adapter is abutted and clamped to the structure to be dismounted;

[0025] All the telescopic supporting arms are adjusted so that the telescopic supporting arms stably abut against the surrounding structure;

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

[0027] In combination with the second aspect, in an implementation, the plurality of adapters comprises a snap spring dismounting adapter, the snap spring dismounting adapter comprises a U-shaped clamping joint and a nut column provided with the universal internal threaded hole, and the U-shaped clamping joint is fixedly connected to the nut column; two clamping legs of the U-shaped clamping joint are provided with magnets, and the magnets are used for attracting the side surface of the soft shaft snap spring; the U-shaped clamping joint further comprises a clamping groove, and the clamping groove is used for matching the flange of the soft shaft snap spring;

[0028] The abutting and clamping of the adapter to the structure to be dismounted comprises:

[0029] The flange of the soft shaft clamp spring is clamped into the clamping groove of the U-shaped clamp joint, and the magnet is attached to the soft shaft clamp spring side.

[0030] In combination with the second aspect, in an embodiment, the plurality of adapters includes a bearing bushing dismounting adapter, the bearing bushing dismounting adapter includes a nut column provided with the general internal threaded hole, a long connecting rod, and a trailing head; one end of the long connecting rod is coaxially connected to the nut column, and the other end is hingedly connected to the center of the trailing head;

[0031] An arc-shaped edge matching the inner hole of the bearing bushing or the cylinder sleeve is arranged around the trailing head, and the arc-shaped edge is provided with a stepped groove for accommodating the sidewall of the bearing bushing or the cylinder sleeve; the clamping of the adapter to the structure to be dismounted includes:

[0032] The angle between the trailing head and the long connecting rod is adjusted to an acute angle, and the trailing head is deeply inserted into the bottom of the cylinder sleeve;

[0033] The angle of the trailing head is adjusted, and the stepped groove is clamped to the cylinder sleeve wall.

[0034] In combination with the second aspect, in an embodiment, the plurality of adapters includes a bowl pipe dismounting adapter, the bowl pipe dismounting adapter includes an expansion sleeve, a special screw, and a squeezing nut; the general internal threaded hole is located at one end of the special screw; the other end of the special screw is provided with a circular truncated cone nut; the expansion sleeve is sleeved on the special screw, and a section of the expansion sleeve adjacent to the circular truncated cone nut is bifurcated in the radial direction into two or more parts, and the end of the bifurcated expansion sleeve is provided with a protruding tooth; the squeezing nut is threadedly connected to the special screw, and is adjacent to the end surface of the expansion sleeve away from the circular truncated cone nut;

[0035] The clamping of the adapter to the structure to be dismounted includes:

[0036] The end of the expansion sleeve where the protruding tooth is located is inserted into the oil injector sleeve or the bowl-shaped plug;

[0037] The squeezing nut is tightened relative to the special screw, the bifurcated expansion sleeve is squeezed through the circular truncated cone nut, and the protruding tooth tightly grips the inner wall of the oil injector sleeve or the bowl-shaped plug.

[0038] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[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 body structure and various adapters. When the adapter clamps the structure to be disassembled, the length of all the telescopic supporting arms is adjusted so that the telescopic supporting arms abut against the peripheral structure of the structure to be disassembled. The movement direction of the linear motor of the electric main body structure is exactly the pulling direction. Then the linear motor is started to pull the structure to be disassembled outward. Compared with the traditional disassembly methods 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. In addition, the device can disassemble efficiently and importantly, can not damage the peripheral structure while completing the disassembly work, and is easy to use.

[0040] 2. The multi-purpose pulling device of the present application can be used for the soft shaft circlip. The circlip disassembly adapter is specially arranged. The nut column of the circlip disassembly adapter is connected with the threaded conversion rod of the electric main body structure to fix the adapter. Then the flange of the soft shaft circlip is inserted into the clamping groove of the U-shaped adapter. The magnet is attracted to the side surface of the soft shaft circlip. The telescopic supporting arm is supported on the peripheral structure of the soft shaft circlip. Then the linear motor is used to pull the soft shaft circlip out. More importantly, after the soft shaft circlip is pulled out, the magnet is still attracted to the soft shaft circlip, which solves the technical problem that the circlip is difficult to be taken out after being pulled out and falling into the gap between the engine parts.

[0041] 3. The multi-purpose pulling device of the present application can use the nut column of the bearing bush disassembly adapter to connect the threaded conversion rod of the electric main body structure. The tail directly extends into the bottom of the bearing or bush to be disassembled. The stepped groove of the arc-shaped edge can accommodate the side wall of the bearing or bush. The diameter of the arc-shaped edge of the tail is slightly smaller than the installation hole of the bearing or bush. After the telescopic supporting arm is stably supported, the linear motor provides power to pull the bearing or bush out from the bottom by the bearing bush disassembly adapter. The disassembly work is completed efficiently. More importantly, the bearing or bush and the inner wall of the installation hole are not damaged, the disassembly is efficient and the quality is high.

[0042] 4. The multi-purpose pulling device of the present application can use the straight handle adapter to match the cylindrical pin to be disassembled and can use the bent hook disassembly adapter to hook the split pin to be disassembled. After the nut column is connected with the threaded conversion rod of the electric main body structure, the linear motor provides power to complete the disassembly of the cylindrical pin and the split pin efficiently. More importantly, the bearing or bush and the inner wall of the installation hole are not damaged, the disassembly is efficient and the quality is high.

[0043] 5. The multi-purpose pulling device of the present application comprises a bowl tube dismounting adapter head, which is ingeniously matched with an expansion sleeve, a special screw and a pressing nut, the end of the expansion sleeve where the protruding teeth are located is used for inserting into the oil injector sleeve or the bowl-shaped plug, when the pressing nut is tightened relative to the special screw, the end of the expansion sleeve where the protruding teeth are located is subjected to the extrusion of the circular cone nut, and the protruding teeth will be radially expanded, and then the oil injector sleeve or the bowl-shaped plug can be directly pulled out under the action of the linear motor, the dismounting work of the oil injector sleeve or the bowl-shaped plug can be efficiently completed, and the mounting hole of the oil injector sleeve or the bowl-shaped plug is not damaged, and the dismounting quality is high.

[0044] 6. The pulling method of the present application is simple and efficient, only needs to select the corresponding adapter head according to the structure to be dismounted, then clamps the structure to be dismounted through the adapter head, then adjusts all the telescopic supporting arms to achieve stable supporting effect, and then opens the linear motor, and the structure to be dismounted can be pulled out through the threaded conversion rod and the adapter head, which is efficient and can dismount various structures to be dismounted, and has strong practicality. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0046] Figure 1 The structural schematic diagram of the electric main body structure provided by the embodiment of the present application is shown in the figure.

[0047] Figure 2 The schematic diagram of one direction of the snap spring dismounting adapter head provided by the embodiment of the present application is shown in the figure.

[0048] Figure 3 The schematic diagram of another direction of the snap spring dismounting adapter head provided by the embodiment of the present application is shown in the figure.

[0049] Figure 4 The application schematic diagram of the multi-purpose pulling device with the snap spring dismounting adapter head provided by the embodiment of the present application pulling the soft shaft snap spring is shown in the figure.

[0050] Figure 5 The schematic diagram of one direction of the bearing bush dismounting adapter head provided by the embodiment of the present application is shown in the figure.

[0051] Figure 6 The schematic diagram of another direction of the bearing bush dismounting adapter head provided by the embodiment of the present application is shown in the figure.

[0052] Figure 7Application diagram of the multi-purpose drawing device with bearing bush pulling device provided by the embodiment of the present application;

[0053] Figure 8 One direction diagram of the straight handle conversion head provided by the embodiment of the present application;

[0054] Figure 9 Another direction diagram of the straight handle conversion head provided by the embodiment of the present application;

[0055] Figure 10 Application diagram of the multi-purpose drawing device with straight handle conversion head pulling cylindrical pin provided by the embodiment of the present application;

[0056] Figure 11 Structure diagram of the oil injector sleeve dismounting conversion head provided by the embodiment of the present application;

[0057] Figure 12 Structure diagram of the oil injector sleeve;

[0058] Figure 13 Diagram of the first expansion sleeve of the oil injector sleeve dismounting conversion head provided by the embodiment of the present application;

[0059] Figure 14 Diagram of the first special screw rod of the oil injector sleeve dismounting conversion head provided by the embodiment of the present application;

[0060] Figure 15 Structure diagram of the bowl plug dismounting conversion head provided by the embodiment of the present application;

[0061] Figure 16 Application diagram of the multi-purpose drawing device with bowl plug dismounting conversion head pulling bowl plug provided by the embodiment of the present application;

[0062] Figure 17 Structure diagram of the hook dismounting conversion head provided by the embodiment of the present application;

[0063] Figure 18 Application diagram of the multi-purpose drawing device with hook dismounting conversion head pulling split pin provided by the embodiment of the present application;

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

[0065] 21, soft shaft clamp spring; 22, cylinder bush; 23, split pin; 24, cylindrical pin; 25, oil injector sleeve; 26, bowl plug;

[0066] 6, clamp spring dismounting conversion head; 61, U-shaped clamping joint; 611, clamping groove; 612, magnet;

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

[0068] 8. Straight handle adapter; 81. Threaded rod;

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

[0070] 10. Disassembly adapter for the 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 present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, 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 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 plurality of adapters.

[0075] Among them, such as 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 disposed at the end of the linear motor 2. Two or more telescopic support arms 3 are arranged parallel to the threaded conversion rod 4 for support. The threaded conversion rod 4 is used to connect to various adapters. The telescopic support arms 3 are used to support surrounding structures, making it easier for the electric main structure 100 to pull out the structure to be removed 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, which is used to match the threaded connection of the threaded conversion rod 4, 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 of various forms of structures to be disassembled through an electric main body structure 100 and various adapters. When the adapter clamps the structure to be disassembled, the length of all the telescopic supporting arms 3 is adjusted so that the telescopic supporting arms 3 abut against the peripheral structure of the structure to be disassembled. The movement direction of the linear motor 2 of the electric main body structure 100 is exactly the pulling direction. Then the linear motor is started to pull the structure to be disassembled outward. Compared with the traditional disassembly methods 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. In addition, the disassembly is efficient. More importantly, the peripheral structure can be damaged during the disassembly. The use is convenient.

[0078] As shown in Figure 1 , the electric main body structure 100 comprises 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. The handle 5 is provided with a switch of the linear motor 2. The electric main body structure 100 further comprises a rectangular support plate. A threaded conversion rod 4 vertically penetrates the center of the rectangular support plate. Two or more telescopic supporting arms 3 for supporting also vertically penetrate the rectangular support plate. The telescopic supporting arms 3 can be telescoped relative to the rectangular support plate to reach a stable supporting position.

[0079] As shown in Figure 2 , Figure 3 and Figure 4 , further, in an embodiment, the various adapters comprise a clamp spring disassembly conversion head 6 for disassembling a soft shaft clamp spring 21, especially for a gearshift soft shaft clamp spring 21.

[0080] Specifically, the soft shaft clamp spring 21 comprises two clamping legs and a plate body connecting the clamping legs. A U-shaped gap is formed between the two clamping legs. The plate body is provided with a flange. The U-shaped gap of the soft shaft clamp spring 21 clamps a tubular structure.

[0081] The clamp spring disassembly conversion head 6 comprises a U-shaped clamping joint 61 and a nut column provided with a general internal thread hole 200. The U-shaped clamping joint 61 is fixedly connected to the nut column. The nut column is connected to the central part of the end face of the U-shaped clamping joint 61.

[0082] The two clamping legs of the U-shaped clamping joint 61 are provided with magnets 612 for attracting the side surface of the soft shaft clamp spring 21 to facilitate positioning and clamping. More importantly, it can effectively prevent the clamp spring from falling into the gap between the engine parts after pulling and being difficult to take out. The U-shaped clamping joint 61 further comprises a clamping groove 611 for matching the flange of the soft shaft clamp spring 21 to make the pulling force stable.

[0083] The multi-purpose pulling device of the present application is aimed at the soft shaft circlip 21. The circlip dismounting adapter 6 is specially arranged. The nut column of the circlip dismounting adapter 6 is connected to the threaded adapter rod 4 of the electric main body structure 100 to fix the adapter. Then the flange of the soft shaft circlip 21 is inserted into the clamping groove 611 of the U-shaped clamping adapter 61. The magnet 612 is adsorbed to the side of the soft shaft circlip 21. The telescopic supporting arm 3 is used to support the peripheral structure of the soft shaft circlip 21. The linear motor 2 is used to pull strongly. The soft shaft circlip 21 can be pulled out strongly. More importantly, after being pulled out, the magnet 612 still adsorbs the soft shaft circlip 21. The technical problem of difficulty in taking out the circlip after being pulled out and falling into the gap between the engine parts is solved.

[0084] As shown in Figure 5 , Figure 6 and Figure 7 , further, in an embodiment, the plurality of adapters includes a bearing bush dismounting adapter 7 for dismounting the engine bush and the cylinder block oil pump ring bearing. Specifically, the engine bush is in a tubular structure, and the cylinder block oil pump ring bearing is in a thin plate circular ring structure.

[0085] The bearing bush dismounting adapter 7 further includes a nut column provided with a general internal thread hole 200, a long connecting rod 71 and a trailing head 72. The trailing head 72 is in a plate 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 trailing head 72.

[0086] The periphery of the trailing head 72 is provided with an arc-shaped edge matched with the inner hole of the bearing or bush 22. The arc-shaped edge is provided with a stepped groove 721 for accommodating the side wall of the bearing or bush 22.

[0087] The multi-purpose pulling device of the present application can connect the threaded adapter rod 4 of the electric main body structure 100 by the nut column of the bearing bush dismounting adapter 7. The trailing head 72 directly extends into the bottom of the bearing or bush to be dismounted. The stepped groove 721 of the arc-shaped edge just accommodates the side wall of the bearing or bush 22. The diameter of the arc-shaped edge of the trailing head 72 corresponds to the diameter of the mounting hole of the bearing or bush, which is slightly smaller. After the telescopic supporting arm 3 is stably supported, the linear motor 2 provides power. The bearing bush dismounting adapter 7 can pull the bearing or bush from the bottom inwardly and outwardly to efficiently complete the dismounting work. More importantly, the bearing or bush and the inner wall of the mounting hole are not damaged. The dismounting is efficient and of high quality.

[0088] Further, in an embodiment, the plurality of adapters includes a straight handle adapter 8 and a bent hook dismounting adapter 11.

[0089] As shown in Figure 8 , Figure 9 and Figure 10As shown, the straight handle conversion head 8 comprises a nut post provided with a general internal threaded hole 200 and a threaded rod 81 coaxially connected with the nut post, and the threaded rod 81 is used for matching the cylindrical pin 24 to be disassembled.

[0090] As shown, the straight handle conversion head 8 comprises a nut post provided with a general internal threaded hole 200 and a threaded rod 81 coaxially connected with the nut post, and the threaded rod 81 is used for matching the cylindrical pin 24 to be disassembled. Figure 17 and Figure 18 As shown, the straight handle conversion head 8 comprises a nut post provided with a general internal threaded hole 200 and a threaded rod 81 coaxially connected with the nut post, and the threaded rod 81 is used for matching the cylindrical pin 24 to be disassembled.

[0091] As shown, the straight handle conversion head 8 comprises a nut post provided with a general internal threaded hole 200 and a threaded rod 81 coaxially connected with the nut post, and the threaded rod 81 is used for matching the cylindrical pin 24 to be disassembled.

[0092] Further, in an embodiment, the plurality of adapters comprises a bowl pipe disassembly conversion head, and the bowl pipe disassembly conversion head is used for disassembling the oil injector sleeve 25 or the bowl plug 26.

[0093] The bowl pipe disassembly conversion head comprises an expansion sleeve, a special screw rod and a pressing nut, a general internal threaded hole 200 is arranged at one end of the special screw rod, and a circular platform nut is arranged at the other end of the special screw rod.

[0094] The expansion sleeve is sleeved on the special screw rod, and a section of the expansion sleeve adjacent to the circular platform nut is bifurcated in the radial direction into two or more parts, and the end of the bifurcated expansion sleeve is provided with a protruding tooth. The end of the expansion sleeve where the protruding tooth is located is used for inserting into the oil injector sleeve 25 or the bowl plug 26. The pressing nut is threadedly connected to the special screw rod, and is adjacent to the end surface of the expansion sleeve away from the circular platform nut. The pressing nut is tightened relative to the special screw rod and presses the bifurcated expansion sleeve through the circular platform nut, so as to grab the inner wall of the oil injector sleeve 25 or the bowl plug 26 through the protruding tooth.

[0095] The multi-purpose pulling device of the present application comprises the bowl pipe disassembly conversion head, which is ingeniously matched by the expansion sleeve, the special screw rod and the pressing nut. The end of the expansion sleeve where the protruding tooth is located is used for inserting into the oil injector sleeve 25 or the bowl plug 26. When the pressing nut is tightened relative to the special screw rod, the end of the expansion sleeve where the protruding tooth is located is pressed by the circular platform nut, and will be opened in the radial direction. The protruding tooth grabs the inner wall of the oil injector sleeve 25 or the bowl plug 26, and then the oil injector sleeve 25 or the bowl plug 26 can be directly pulled out under the action of the linear motor 2. The disassembly of the oil injector sleeve 25 or the bowl plug 26 can be efficiently completed, and the installation hole of the oil injector sleeve 25 or the bowl plug 26 is not damaged, and the disassembly quality is high.

[0096] Further, in an embodiment, the bowl pipe dismounting adapter is divided into an oil injector sleeve dismounting adapter 9 and a bowl plug dismounting adapter 10, and the design principles of the two adapters are basically the same, both of which are to make the bifurcated expansion sleeve expand by extrusion force, and then the protruding teeth grab the inner wall, but the structures still have slight differences.

[0097] Specifically, the universal internal thread hole 200 of the oil injector sleeve dismounting adapter 9 is arranged at the end of the special screw; and the circular truncated cone nut in the initial state is located outside the end where the protruding teeth of the expansion sleeve of the oil injector sleeve dismounting adapter 9 are located. When extruded, the circular truncated cone nut slowly drills from the outside of the end where the protruding teeth of the expansion sleeve are located to the inside, and the protruding teeth are opened to grab the inner wall of the oil injector sleeve 25.

[0098] The structural difference between the oil injector sleeve 25 and the bowl plug 26 is that the length of the tubular part of the oil injector sleeve 25 is long enough, while the length of the tubular part of the bowl plug 26 is very short.

[0099] A part of the extrusion nut of the bowl plug dismounting adapter 10 is threadedly connected with the special screw, and the other part is outwardly arranged and contains the universal internal thread hole 200. The extrusion nut of the bowl plug dismounting adapter 10 plays both the extrusion role and the connecting role. The circular truncated cone nut in the initial state is wrapped by the end where the protruding teeth of the expansion sleeve of the bowl plug dismounting adapter 10 are located. When the expansion sleeve is extruded, the special screw only needs to travel a small stroke, and the protruding teeth can grab the inner wall of the bowl plug 26. The inner wall of the expansion sleeve wrapping the circular truncated cone nut has a slope suitable for the circular truncated cone nut.

[0100] By comparison, the side wall of the expansion sleeve with protruding teeth of the oil injector sleeve dismounting adapter 9 can be relatively thicker, while the side wall of the expansion sleeve with protruding teeth of the bowl plug dismounting adapter 10 is relatively thin because it needs to wrap the circular truncated cone nut.

[0101] The multi-purpose drawing device of the present application can be used for the oil injector sleeve 25 or the bowl plug 26 because the lengths of the tubular parts of the oil injector sleeve 25 or the bowl plug 26 are different, that is, the lengths grabbed by the protruding teeth are different. Therefore, the bowl pipe dismounting adapter is divided into the oil injector sleeve dismounting adapter 9 and the bowl plug dismounting adapter 10. The circular truncated cone nut in the initial state of the oil injector sleeve dismounting adapter 9 is located outside the end where the protruding teeth of the expansion sleeve of the oil injector sleeve dismounting adapter 9 are located, and the circular truncated cone nut in the initial state of the bowl plug dismounting adapter 10 is wrapped by the end where the protruding teeth of the expansion sleeve of the bowl plug dismounting adapter 10 are located. The slight difference can better adapt to the two structures to be dismounted, has high dismounting efficiency, and is safe in dismounting.

[0102] As Figures 11-14As shown, further, the injector sleeve disassembly conversion head 9 includes a first expansion sleeve 91, a first special screw 92 and a first extrusion nut 93, a universal internal threaded hole 200 is set at the top of the special screw, and a frustum nut is set at the bottom 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 part 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 part of the first special screw 92.

[0104] A section of the first expansion sleeve 91, adjacent to the conical nut, radially bifurcates into two or more sections. First protruding teeth 911 are provided at the ends of the bifurcated first expansion sleeve 91. The end of the first expansion sleeve 91 with the first protruding teeth 911 is designed to be inserted into the injector sleeve 25 or bowl-shaped plug 26. A first compression nut 93 is threadedly connected to a first, specially designed screw 92, adjacent to the end face of the first expansion sleeve 91, distal from the conical nut. The first compression nut 93 is tightened against the first, specially designed screw 92 and squeezes the bifurcated first expansion sleeve 91 through the conical nut, gripping the inner wall of the injector sleeve 25 or bowl-shaped plug 26 via the first protruding teeth 911.

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

[0106] A universal internal threaded hole 200 is located at the top of the second extrusion nut 103. 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 fitted over the second custom screw 102. The conical nut at the bottom of the second custom screw 102 is enclosed by the second raised teeth 1011 of the second expansion sleeve 101. The threaded portion of the top of the second custom screw 102 is exposed, and the second extrusion nut 103 is threadedly connected to the exposed threaded portion of the second custom screw 102.

[0107] The second expansion sleeve 101, located adjacent to the conical nut, is radially bifurcated into two or more sections. Second protruding teeth 1011 are located at the ends of the bifurcated second expansion sleeve 101. The end of the second expansion sleeve 101 where the second protruding teeth 1011 are located is designed to be inserted into the injector sleeve 25 or bowl-shaped plug 26. A second compression nut 103 is tightened against the second specialized screw 102 and compresses the bifurcated second expansion sleeve 101 through the conical nut, gripping the inner wall of the injector sleeve 25 or bowl-shaped plug 26 via the second protruding teeth 1011.

[0108] Further, the first expansion sleeve 91 and the second expansion sleeve 101 are each divided into a large-diameter section and a small-diameter section, and the small-diameter section is radially bifurcated into two or more. 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 facilitates extrusion expansion.

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

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

[0111] According to the structure to be disassembled, a corresponding adapter is selected, and the threaded conversion rod 4 is connected to the universal internal threaded hole 200 of the adapter. Specifically, to disassemble the soft shaft clamp spring 21, the clamp spring disassembly adapter 6 is selected. To disassemble the oil injector sleeve, the oil injector sleeve disassembly adapter 9 is selected.

[0112] The adapter is butted and clamped to the structure to be disassembled.

[0113] Adjust all the telescopic support arms 3 so that they stably abut the surrounding structure, achieving a stable support effect and providing a foundation for subsequent drawing.

[0114] Turn on the linear motor 2, which draws the structure to be disassembled outwards through the threaded conversion rod 4 and the adapter.

[0115] The drawing method of the application is simple and efficient. It only needs to select a corresponding adapter according to the structure to be disassembled, then butt and clamp the adapter to the structure to be disassembled, then adjust all the telescopic support arms 3 to achieve a stable support effect, and then turn on the linear motor 2 to draw the structure to be disassembled outwards through the threaded conversion rod 4 and the adapter. The method is efficient and can disassemble various structures, which is practical.

[0116] As Figure 2 , Figure 3 and Figure 4As shown, further, in an embodiment, the plurality of adapters includes a snap ring dismounting adapter 6 for dismounting the soft shaft snap ring 21, especially for the gearbox hanging soft shaft snap ring 21. Specifically, the soft shaft snap ring 21 includes two clamping legs and a plate body connecting the clamping legs, and a U-shaped gap is formed between the two clamping legs, and the plate body is provided with a folded edge, and the U-shaped gap of the soft shaft snap ring 21 is clamped on the tubular structure. The snap ring dismounting adapter 6 includes a U-shaped clamping joint 61 and a nut column provided with a general 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 central end face of the U-shaped clamping joint 61. The two clamping legs of the U-shaped clamping joint 61 are provided with magnets 612, which are used to adsorb the side surface of the soft shaft snap ring 21, so as to facilitate positioning and clamping, and more importantly, can effectively prevent the snap ring from falling into the gap between the engine parts after being pulled out, making it difficult to take out. The inverted U-shaped clamping joint 61 also includes a clamping groove 611 for matching the folded edge of the soft shaft snap ring 21, so that the pulling force is stable.

[0117] The adapter is used to clamp and dismount the structure to be dismounted, which includes:

[0118] The folded edge of the soft shaft snap ring 21 is clamped into the clamping groove 611 of the U-shaped clamping joint 61, and the magnet is tightly adsorbed to the side surface of the soft shaft snap ring 21, that is, stable clamping is achieved.

[0119] As shown in Figure 5 , Figure 6 and Figure 7 , further, in an embodiment, the plurality of adapters includes a bearing bush dismounting adapter 7 for dismounting the engine cylinder liner and the annular bearing of the cylinder block oil pump. Specifically, the engine cylinder liner is in a tubular structure, and the annular bearing of the cylinder block oil pump is in a thin plate ring structure. The bearing bush dismounting adapter 7 also includes a nut column provided with a general internal threaded hole 200, a long connecting rod 71 and a trailing head 72; the trailing head 72 is in a plate structure, one end of the long connecting rod 71 is coaxially connected to the nut column, and the other end is hingedly connected to the center of the trailing head 72.

[0120] The trailing head 72 is provided with an arc-shaped edge matching the inner hole of the bearing or the cylinder liner 22 around the periphery, and the arc-shaped edge is provided with a stepped groove 721 for accommodating the side wall of the bearing or the cylinder liner 22.

[0121] The adapter is used to clamp and dismount the structure to be dismounted, which includes:

[0122] The angle between the trailing head 72 and the long connecting rod 71 is adjusted to an acute angle, and the trailing head 72 is deeply inserted into the bottom of the cylinder liner;

[0123] The angle of the trailing head 72 is adjusted, and the stepped groove is clamped on the cylinder liner wall.

[0124] Further, in an embodiment, the plurality of adapters includes a bowl pipe dismounting adapter for dismounting the oil sprayer sleeve 25 or the bowl plug 26.

[0125] The bowl pipe dismounting adapter comprises an expansion sleeve, a special screw and a pressing nut. A general internal thread hole 200 is arranged at one end of the special screw, and a round table 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 round table nut is radially bifurcated into two or more parts, and the end of the bifurcated expansion sleeve is provided with a protruding tooth. The end of the expansion sleeve where the protruding tooth is arranged is used for being inserted into the oil injector sleeve 25 or the bowl plug 26. The pressing nut is threadedly connected to the special screw, and is arranged at the end surface of the special screw away from the round table nut. The pressing nut is tightened relative to the special screw, and the bifurcated expansion sleeve is pressed by the round table nut, so that the protruding tooth clamps the inner wall of the oil injector sleeve 25 or the bowl plug 26.

[0127] The adapter is used for clamping the structure to be dismounted, and comprises:

[0128] The end of the expansion sleeve where the protruding tooth is arranged is inserted into the oil injector sleeve 25 or the bowl plug 26.

[0129] The pressing nut is tightened relative to the special screw, and the bifurcated expansion sleeve is pressed by the round table nut, so that the protruding tooth clamps the inner wall of the oil injector sleeve 25 or the bowl plug 26.

[0130] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0131] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0132] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

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 provided at the end of the linear motor (2), and two or more telescopic support arms (3) for supporting are provided in parallel around the threaded conversion rod (4); A plurality of adapters, each adapter being used to disassemble a structure to be disassembled, a universal internal threaded hole (200) being provided 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 to clamp and connect the structure to be disassembled; The various adapters include a bowl-shaped tube disassembly conversion head, and the bowl-shaped tube disassembly conversion head 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 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 end where the protruding tooth of the expansion sleeve is located is used to be inserted 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 bifurcated expansion sleeve through the truncated cone nut, and grasps the inner wall of the injector sleeve (25) or the bowl-shaped plug (26) through the protruding tooth; 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 universal internal threaded hole (200) of the injector sleeve disassembly conversion head (9) opens the end of the special screw; the frustum 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 part of the extrusion nut of the bowl plug disassembly conversion head (10) is threadedly connected to the special screw, and the other part is arranged outward and includes the universal internal threaded hole (200); the frustum nut in the initial state is wrapped by the end where the raised teeth of the expansion sleeve of the bowl plug disassembly conversion head (10) are located.

2. A multi-purpose pulling device according to claim 1, characterized in that: The plurality of adapters include a retaining spring disassembly adapter (6), wherein the retaining spring disassembly adapter (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 adsorb the side of the flexible shaft retaining spring (21); the U-shaped retaining joint (61) further 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 according to claim 1, characterized in that: The plurality of 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 drag head (72) is provided with an arcuate edge around its periphery that matches the inner hole of the bearing bush or cylinder sleeve (22), and the arcuate 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 cylinder sleeve (22).

4. A multi-purpose pulling device according to claim 1, characterized in that: The various adapters include a straight handle adapter (8) and a hook disassembly adapter (11); The straight handle conversion head (8) comprises a nut column provided with the universal internal threaded hole (200) 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 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 using the universal internal thread hole (200) of the adapter; Connecting the adapter to the structure to be disassembled and clamping it tightly; 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 via the threaded conversion rod (4) and the adapter.

6. The drawing method according to claim 5, wherein: The multiple adapters include a retaining spring disassembly adapter (6), the retaining spring disassembly adapter (6) including a U-shaped retaining joint (61) and a nut column provided with the universal internal threaded hole (200), the U-shaped retaining joint (61) being fixedly connected to the nut column; two retaining feet of the U-shaped retaining joint (61) are provided with magnets (612), the magnets (612) being used to adsorb the side of the flexible shaft retaining spring (21); the U-shaped retaining joint (61) further includes a retaining groove (611), the retaining groove (611) being 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 tightly attached to the side surface of the flexible shaft retaining spring (21).

7. The drawing method according to claim 5, wherein: The plurality of 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 arcuate edge around its periphery that matches the inner hole of the bearing bush or cylinder sleeve (22), and the arcuate 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 cylinder sleeve (22); the step of docking the adapter with the structure to be disassembled, comprising: Adjust the angle between the drag head (72) and the long connecting rod (71) to an acute angle and insert it into the bottom of the cylinder sleeve; Adjust the angle of the drag head (72) and snap the stepped groove into the cylinder liner wall.

8. The drawing method according to claim 5, wherein: The step of docking the adapter and clamping the structure to be disassembled comprises: 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); The extrusion nut is tightened relative to the special screw, and the bifurcated expansion sleeve is squeezed through the frustum nut, so that the raised teeth grasp the inner wall of the injector sleeve (25) or the bowl-shaped plug (26).

Images