A disassembly tool

Abstract

The present invention belongs to the technical field of engines and discloses a disassembly tool for disassembling cylinder liners, piston groups and connecting rods within the engine frame. The disassembly tool includes a first disassembly component and a second disassembly component. The first disassembly component includes a connection part and a abutting part. The connection part can be detachably connected to the big end of the connecting rod. The abutting part is connected to the connection part and can abut against the cylinder liner. After the connection part is connected to the big end of the connecting rod, the abutting part can abut against the cylinder liner to fix the big end of the connecting rod, so that the connecting rod cannot rotate relative to the piston, thereby avoiding damage to the inner wall of the frame and the cooling oil pipe caused by the connecting rod during the disassembly process. The second disassembly component is detachably connected to the piston to lift the cylinder liner, piston and connecting rod through the second disassembly component. The disassembly tool can complete the disassembly operation of the cylinder liner, connecting rod and piston, and at the same time, it can also avoid the collision between the big end of the connecting rod and the inner wall of the frame during the disassembly process, improving the disassembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and particularly to a disassembly tool. Background Art

[0002] Engines are widely used in vehicles such as automobiles and ships. Generally, the cylinders of existing engines are arranged in an L-type or V-type pattern. However, most existing V-type engines use inclined-cut connecting rods, and the connecting rod and the piston are connected by a piston pin. Therefore, the connecting rod and the piston will rotate relative to each other. When disassembling the cylinder liner, the connecting rod, and the piston, due to the small internal space of the engine block, the outer side of the large end of the connecting rod is extremely likely to collide with the inner wall of the engine block and the cooling oil pipe inside the cylinder liner, causing damage to the inner wall of the engine block and the cooling oil pipe.

[0003] Therefore, there is an urgent need to design a disassembly tool to avoid the large end of the connecting rod from colliding with the inner wall of the engine block and the cooling oil pipe when disassembling the cylinder liner, the connecting rod, and the piston, and to complete the disassembly operation of the cylinder liner, the connecting rod, and the piston. Summary of the Invention

[0004] The purpose of the present invention is to provide a disassembly tool to complete the disassembly operation of the cylinder liner, the connecting rod, and the piston, and at the same time, to avoid the large end of the connecting rod from colliding with the inner wall of the engine block and the cooling oil pipe during the disassembly process.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The present invention provides a disassembly tool for disassembling the cylinder liner, the piston, and the connecting rod in the engine block. The piston is installed in the cylinder liner, and the small end of the connecting rod is hinged to the piston. By adjusting the position of the piston in the cylinder liner, the large end of the connecting rod extends out of the cylinder liner. The disassembly tool includes:

[0007] A first disassembly component, including a connecting portion and a resisting portion. The connecting portion can be detachably connected to the large end of the connecting rod. The resisting portion is connected to the connecting portion and can be abutted against the cylinder liner to fix the large end of the connecting rod; and

[0008] A second disassembly component, which is selectively connected to the piston to lift the cylinder liner, the connecting rod, and the piston through the second disassembly component.

[0009] The disassembly tool is used to disassemble the cylinder liner, as well as the piston and connecting rod inside the cylinder liner. The disassembly tool includes a first disassembly component and a second disassembly component. The first disassembly component includes a connecting part and an abutting part. The connecting part can be detachably connected to the big end of the connecting rod. The abutting part is connected to the connecting part and can abut against the cylinder liner. After the connecting part is connected to the big end of the connecting rod, the abutting part can abut against the cylinder liner to fix the big end of the connecting rod, so that the connecting rod cannot rotate relative to the piston, avoiding damage to the inner wall of the frame and the cooling oil pipe during the disassembly process. The second disassembly component is detachably connected to the piston to lift the cylinder liner, piston and connecting rod through the second disassembly component. This disassembly tool can complete the disassembly operation of the cylinder liner, connecting rod and piston, and at the same time, it can also avoid the collision between the big end of the connecting rod and the inner wall of the frame during the disassembly process, improving the disassembly efficiency.

[0010] Preferably, the connecting part includes:

[0011] A first connecting plate; and

[0012] A connecting piece, and the first connecting plate is connected to the big end of the connecting rod through the connecting piece.

[0013] The first connecting plate can be connected to the big end of the connecting rod through the connecting piece, so that the connecting part is connected to the big end of the connecting rod.

[0014] Preferably, a connecting hole is correspondingly arranged on the side of the first connecting plate away from the piston of the big end of the connecting rod, and the connecting piece can pass through the connecting hole to be connected to the connecting rod.

[0015] A connecting hole is correspondingly arranged on the side of the first connecting plate away from the piston of the big end of the connecting rod. The connecting piece of the connecting part can pass through the connecting hole to be connected to the connecting rod, so that the connecting part is connected to the big end of the connecting rod.

[0016] Preferably, the abutting part includes:

[0017] Two abutting plates, which are respectively arranged on both sides of the first connecting plate, and both of the two abutting plates abut against the cylinder liner.

[0018] After the connecting part is connected to the big end of the connecting rod, the two abutting plates located on both sides of the first connecting plate can both abut against the cylinder liner to fix the connecting rod, so that the connecting rod cannot touch the inner wall of the frame.

[0019] Preferably, the abutting part further includes a second connecting plate, the second connecting plate is connected to the first connecting plate, and the two abutting plates are connected to both sides of the second connecting plate.

[0020] The second connecting plate of the abutting part can connect the abutting plates connected to both sides of it to the first connecting plate, facilitating the installation of the abutting plates.

[0021] Preferably, a stepped structure is provided on the top edge of the abutting plate, and the bottom of the side wall of the cylinder liner is clamped in the stepped structure.

[0022] The stepped structure provided on the top edge of the abutting plate can enable the bottom of the side wall of the cylinder liner to be clamped in the stepped structure, so as to prevent the abutting plate from moving during the disassembly process, fix the connecting rod, and make the connecting rod unable to rotate.

[0023] Preferably, the stepped structures are provided at both ends of the top edge of the abutting plate.

[0024] The stepped structures provided at both ends of the top edge of the abutting plate can further prevent the abutting plate from moving during the disassembly process, and the fixing effect is better.

[0025] Preferably, the top edge of the abutting plate is arranged at an angle with the first connecting plate.

[0026] The top edge of the abutting plate is arranged at an angle with the first connecting plate, so that after the first connecting plate is connected to the large end of the connecting rod, the top edge of the abutting plate can abut against the bottom of the cylinder liner.

[0027] Preferably, the bottom edge of the abutting plate is flush with the bottom surface of the first connecting plate.

[0028] The bottom edge of the abutting plate being flush with the bottom surface of the first connecting plate can make the structure of the disassembly tool more compact and beautiful.

[0029] Preferably, the second disassembly component is a screw or a bolt.

[0030] The screws or bolts used for the second disassembly component are all standard parts, which can reduce the manufacturing and use costs of the second disassembly component.

[0031] Advantages of the present invention:

[0032] A disassembly tool proposed by the present invention is used for disassembling a cylinder liner and a piston and a connecting rod inside the cylinder liner. The disassembly tool includes a first disassembly component and a second disassembly component. The first disassembly component includes a connecting portion and an abutting portion. The connecting portion can be detachably connected to the large end of the connecting rod. The abutting portion is connected to the connecting portion and can abut against the cylinder liner. After the connecting portion is connected to the large end of the connecting rod, the abutting portion can abut against the cylinder liner to fix the large end of the connecting rod and make the connecting rod unable to rotate relative to the piston, so as to avoid damaging the inner wall of the frame and the cooling oil pipe by the connecting rod during the disassembly process. The second disassembly component is detachably connected to the piston to lift the cylinder liner, the connecting rod and the piston through the second disassembly component. The disassembly tool can complete the disassembly operation of the cylinder liner, the connecting rod and the piston, and at the same time, can also avoid the large end of the connecting rod from colliding with the inner wall of the frame during the disassembly process, improving the disassembly efficiency. Description of the drawings

[0033] Figure 1 It is a schematic diagram showing the disassembly tool proposed by the present invention connected to the cylinder liner, connecting rod, and piston within the engine block;

[0034] Figure 2 It is a schematic diagram showing the disassembly tool proposed by the present invention connected to the cylinder liner, connecting rod, and piston;

[0035] Figure 3 It is a schematic diagram showing the disassembly tool proposed by the present invention connected to the connecting rod and piston;

[0036] Figure 4 It is a schematic diagram of the first disassembly component of the disassembly tool proposed by the present invention;

[0037] Figure 5 It is a schematic diagram showing the connection between the first connecting plate and the second connecting plate of the disassembly tool proposed by the present invention.

[0038] In the figure:

[0039] 1. First disassembly component; 2. Second disassembly component;

[0040] 11. Connection part; 12. Abuttment part;

[0041] 100. Cylinder liner; 200. Connecting rod; 300. Piston; 400. Engine block; 111. First connecting plate; 112. Connecting member; 121. Abutment plate; 122. Second connecting plate;

[0042] 1111. Connection hole; 1112. Serrated structure; 1211. Top edge; 1212. Bottom edge; 1213. Step structure. Detailed implementation manners

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention and not for limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0044] The present invention provides a disassembly tool for disassembling the cylinder liner, piston, and connecting rod within the engine block of an engine. The piston is installed within the cylinder liner, and the small end of the connecting rod is hinged to the piston. By adjusting the position of the piston within the cylinder liner, the large end of the connecting rod can be extended out of the cylinder liner, where the large end of the connecting rod is the end with an inclined cut. In this embodiment, the disassembly tool is used for the cylinder liner, piston, and connecting rod within the engine block of a V-type engine. As Figures 1 - 3As shown in the figure, the disassembly tool includes a first disassembly component 1 and a second disassembly component 2. The first disassembly component 1 includes a connecting portion 11 and a resisting portion 12. The connecting portion 11 can be detachably connected to the large end of the connecting rod 200. The resisting portion 12 is connected to the connecting portion 11 and can abut against the cylinder liner 100. After the connecting portion 11 is connected to the large end of the connecting rod 200, the resisting portion 12 can abut against the cylinder liner 100 to fix the large end of the connecting rod 200, so that the connecting rod 200 cannot rotate relative to the cylinder liner 100, thereby avoiding damage to the inner wall of the frame 400 by the connecting rod 200 during the disassembly process. The second disassembly component 2 is detachably connected to the piston 300 to lift the cylinder liner 100, the connecting rod 200 and the piston 300 through the second disassembly component 2. The disassembly tool can complete the disassembly operation of the cylinder liner 100, the connecting rod 200 and the piston 300, and at the same time, it can also avoid the collision between the large end of the connecting rod 200 and the inner wall of the frame 400 during the disassembly process, improving the disassembly efficiency.

[0045] Since the temperature inside the piston 300 is relatively high when the engine is working and the piston assembly needs lubrication, it is necessary to install a cooling oil pipe inside the frame 400 to spray the cooling lubricating oil into the piston 300 to cool and lubricate the piston 300. Then, when disassembling the cylinder liner 100, the connecting rod 200 and the piston 300, it is also necessary to avoid the collision between the connecting rod 200 and the cooling oil pipe. Using the disassembly tool in this embodiment to disassemble the cylinder liner 100, the connecting rod 200 and the piston 300 can not only avoid the contact between the connecting rod 200 and the inner wall of the frame 400, but also avoid the collision between the connecting rod 200 and the cooling oil pipe, improving the disassembly efficiency.

[0046] Specifically, the connecting portion 11 includes a first connecting plate 111 and a connecting member 112. The first connecting plate 111 can be connected to the large end of the connecting rod 200 through the connecting member 112, so that the connecting portion 11 is connected to the large end of the connecting rod 200. Further, a connecting hole 1111 is correspondingly provided on the side of the first connecting plate 111 away from the piston 300 of the large end of the connecting rod 200 (as Figure 5 shown). A threaded hole is provided on the side of the large end of the connecting rod 200 away from the piston 300. The connecting member 112 of the connecting portion 11 can pass through the connecting hole 1111 to be connected to the connecting rod 200, so that the connecting portion 11 is connected to the large end of the connecting rod 200. In this embodiment, the connecting member 112 is a bolt.

[0047] In order to make the connection between the first connecting plate 111 and the connecting rod 200 more stable, a serrated structure 1112 is provided at the end of the first connecting plate 111 where the connecting hole 1111 is located. The serrated structure 1112 can cooperate with the serrations on the end face of the large end of the connecting rod 200 to make the connection between the first connecting plate 111 and the connecting rod 200 more stable, and at the same time, it is also convenient to align the connecting hole 1111 with the bolt hole on the large end of the connecting rod 200.

[0048] As Figure 3 and Figure 4 shown, the abutting portion 12 includes two abutting plates 121 which are respectively arranged on both sides of the first connecting plate 111. Both of the two abutting plates 121 are in abutting connection with the cylinder liner 100. After the connecting portion 11 is connected to the large end of the connecting rod 200, both of the two abutting plates 121 located on both sides of the first connecting plate 111 can be in abutting connection with the cylinder liner 100 to fix the large end of the connecting rod 200, so that the connecting rod 200 cannot touch the inner wall of the frame 400. Further, the abutting portion 12 further includes a second connecting plate 122 which is connected to the first connecting plate 111, and the two abutting plates 121 are connected to both sides of the second connecting plate 122, so that the two abutting plates 121 are connected to the first connecting plate 111. In this embodiment, two threaded holes are provided on both side walls of the second connecting plate 122, and two first through holes are provided on each abutting plate 121 and are arranged near the bottom edge 1212 of the abutting plate 121. A bolt is passed through the first through hole of the abutting plate 121 and is in threaded fit with the corresponding threaded hole to connect the abutting plate 121 to the second connecting plate 122. In addition, in order to connect the second connecting plate 122 to the first connecting plate 111, a second through hole is provided on the first connecting plate 111, a third through hole is provided on the second connecting plate 122, and the third through hole is arranged corresponding to the second through hole. A fixing member is sequentially passed through the second through hole and the third through hole to connect the first connecting plate 111 and the second connecting plate 122. Preferably, multiple groups of the second through hole and the third through hole are provided. In this embodiment, the fixing member is a bolt.

[0049] To prevent the abutting plate 121 from moving during the disassembly process, a stepped structure 1213 is provided on the top edge 1211 of the abutting plate 121 (as Figure 3 and Figure 4 shown), and the bottom of the side wall of the cylinder liner 100 can be clamped in the stepped structure 1213 to prevent the abutting plate 121 from moving during the disassembly process, so as to fix the connecting rod 200 and make the large end of the connecting rod 200 unable to rotate relative to the cylinder liner 100. Preferably, stepped structures 1213 are provided at both ends of the top edge 1211 of the abutting plate 121. Such a setting can further prevent the abutting plate 121 from moving during the disassembly process and has a better fixing effect on the connecting rod 200.

[0050] In this embodiment, since there is an included angle between the plane where the large end of the connecting rod 200 is located and the plane where the bottom of the cylinder liner 100 is located, in order to enable the first connecting plate 111 to be connected to the large end of the connecting rod 200 and enable the abutting plate 121 to be in abutting connection with the cylinder liner 100, the top edge 1211 of the abutting plate 121 is arranged at an included angle with the first connecting plate 111 to adapt to the included angle between the large end of the connecting rod 200 and the bottom of the cylinder liner 100.

[0051] To make the structure of the first disassembly component 1 more compact, the bottom edge 1212 of the abutting plate 121 is set flush with the bottom surface of the first connecting plate 111, so as to make the structure of the disassembly tool more compact and aesthetically pleasing.

[0052] In this embodiment, the second disassembly component 2 uses screws or bolts, so that the second disassembly component 2 can be threadedly engaged with the threaded holes at the top of the piston 300, facilitating the lifting of the cylinder liner 100, connecting rod 200 and piston 300 through the second disassembly component 2. Moreover, screws and bolts are standard parts, which can reduce the manufacturing and use costs of the second disassembly component 2.

[0053] Since the disassembly tool will come into contact with the inner walls of the cylinder liner 100, connecting rod 200 and the frame 400 during the disassembly process, the first connecting plate 111 and the two abutting plates 121 are made of materials with a hardness lower than that of the cylinder liner 100, connecting rod 200 and the frame 400, thus avoiding damage to the cylinder liner 100, connecting rod 200 and the frame 400 by the disassembly tool.

[0054] When using this disassembly tool to disassemble the cylinder liner 100, connecting rod 200 and piston 300, first loosen the connecting bolts between the end cover at the big end of the connecting rod 200 and the connecting rod 200, remove the end cover, then install the first disassembly component 1, abut the top edges 1211 of the two abutting plates 121 against the bottom of the cylinder liner 100, and snap the bottom of the side wall of the cylinder liner 100 into the step structure 1213 on the upper abutting plate 121. Pass the connecting member 112 through the connecting hole 1111 on the first connecting plate 111 to connect the first connecting plate 111 with the big end of the connecting rod 200. Then, screw a bolt into the top of the piston 300 to lift the cylinder liner 100, connecting rod 200 and piston 300 through this bolt. Since the piston 300 and the connecting rod 200 are connected by a piston pin, and the connecting rod 200 and the cylinder liner 100 are connected by the first disassembly component 1, when lifting the bolt, the cylinder liner 100, connecting rod 200 and piston 300 will be lifted simultaneously, and the relative position between the connecting rod 200 and the inner wall of the frame 400 remains unchanged, so that it will not shake during the disassembly process and will not collide with the inner wall of the frame 400 and the cooling oil pipe. After the cylinder liner 100, connecting rod 200 and piston 300 are disassembled as a whole, loosen the connecting member 112 of the first disassembly component 1, remove the first disassembly component 1, and then the cylinder liner 100 can be removed. Finally, loosen the bolt at the top of the piston 300 and remove the piston pin to complete the separation of the connecting rod 200 and the piston 300.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A disassembly tool, characterized in that, it is used to disassemble the cylinder liner (100), piston (300) and connecting rod (200) in the engine frame (400). The piston (300) is installed in the cylinder liner (100), and the small end of the connecting rod (200) is hinged to the piston (300). By adjusting the position of the piston (300) in the cylinder liner (100), the large end of the connecting rod (200) can extend out of the cylinder liner (100). The disassembly tool includes: A first disassembly component (1), including a connecting part (11) and an abutting part (12). The connecting part (11) can be detachably connected to the large end of the connecting rod (200), and the abutting part (12) is connected to the connecting part (11) and can abut against the cylinder liner (100) to fix the large end of the connecting rod (200); and A second disassembly component (2), which is detachably connected to the piston (300) to lift the cylinder liner (100), the connecting rod (200) and the piston (300) through the second disassembly component (2); The connecting part (11) includes: A first connecting plate (111); and A connecting member (112), and the first connecting plate (111) is connected to the large end of the connecting rod (200) through the connecting member (112); The abutting part (12) includes: Two abutting plates (121), which are respectively arranged on both sides of the first connecting plate (111), and both of the two abutting plates (121) abut against the cylinder liner (100); The abutting part (12) further includes a second connecting plate (122), the second connecting plate (122) is connected to the first connecting plate (111), and the two abutting plates (121) are connected to both sides of the second connecting plate (122); A step structure (1213) is arranged on the top edge (1211) of the abutting plate (121), and the bottom of the side wall of the cylinder liner (100) is clamped in the step structure (1213).

2. The disassembly tool according to claim 1, characterized in that, A connecting hole (1111) is correspondingly arranged on the side of the first connecting plate (111) away from the piston (300) of the large end of the connecting rod (200), and the connecting member (112) can pass through the connecting hole (1111) to be connected to the connecting rod (200).

3. The disassembly tool according to claim 1, characterized in that, Both ends of the top edge (1211) of the abutting plate (121) are provided with the step structure (1213).

4. The disassembly tool according to claim 1, characterized in that, The top edge (1211) of the abutting plate (121) is arranged at an angle with the first connecting plate (111).

5. The disassembly tool according to claim 1, characterized in that, The bottom edge (1212) of the abutting plate (121) is flush with the bottom surface of the first connecting plate (111).

6. The disassembly tool according to any one of claims 1-5, characterized in that, The second disassembly component (2) is a screw or a bolt.

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