Special tool suitable for disassembling cylinder sleeve of internal combustion engine

Abstract

The special tool comprises a long screw rod, a short screw rod, a pressing plate and a lifting block, a first movable nut and a second movable nut are sequentially arranged at the upper end of the pressing plate and the upper end of the long screw rod, a downward notch is formed in the lower end of the long screw rod, the short screw rod is arranged at the lower end of the long screw rod, and the lifting block is arranged at the lower end of the short screw rod. A notch is formed in the middle of the long screw, a rib plate matched with the notch is formed at the upper end of the short screw, the rib plate is arranged in the notch, the lower end of the long screw is movably connected with the upper end of the short screw through a flat-end pin with a hole, a bolt hole is formed in the center of the lifting block, and the short screw longitudinally penetrates through the bolt hole. The first fixing nut is arranged at the short screw at the upper part of the short screw, and the second fixing nut is arranged at the short screw at the lower part of the short screw, so that the cylinder sleeve can be effectively prevented from being broken and deformed in the dismounting process, and the maintenance working efficiency of the internal combustion engine is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of cylinder liner removal tools for internal combustion engines, specifically a tool for quick removal and installation of valves in internal combustion engines. Particularly, it relates to its mechanical connection structure. Background Technology

[0002] The outer wall of the cylinder liner, the engine block, and the sealing ring between them form the circulation channel for the cylinder liner cooling water. Given the tight installation of the cylinder liner and the high frictional resistance at the seals, using ordinary tools can easily lead to cylinder liner breakage and deformation. Therefore, a special tool is needed to remove it from the deep bore of the internal combustion engine cylinder. Thus, it is necessary to further improve the existing technology and design a special tool to reduce workload, improve efficiency, and prevent cylinder liner breakage and deformation. Summary of the Invention

[0003] The purpose of this utility model is to provide a special tool for disassembling cylinder liners of internal combustion engines, overcoming the shortcomings and deficiencies of the existing technology.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a special tool for disassembling cylinder liners of internal combustion engines, comprising a long screw, a short screw pressure plate, and a lifting block. The pressure plate has a bolt hole at its center. The long screw is longitudinally inserted through the bolt hole. A first movable nut and a second movable nut are sequentially provided at the upper end of the long screw. A downward-facing groove is formed at the lower end of the long screw. A short screw is provided at the lower end of the long screw, and a rib plate is formed at the upper end of the short screw to mate with the groove. The rib plate is disposed within the groove. The lower end of the long screw and the upper end of the short screw are movably connected by a flat-headed pin with a hole, which penetrates the lower end of the long screw. Pin holes are provided at the end slot and the stiffener plate. The aforementioned flat-headed pin with holes is set through the pin holes. A U-shaped locking pin is provided in the through hole at the end of the flat-headed pin with holes. A bolt hole is also provided at the center of the aforementioned lifting block. The aforementioned short screw is set through the bolt hole longitudinally. A first fixing nut is provided at the upper part of the short screw and a second fixing nut is provided at the lower part of the short screw. The pressure plate consists of a transversely distributed pressure plate beam and two longitudinally distributed pressure plate beams. The upper end of the pressure plate beam is fixedly connected to the end of the pressure plate beam to form an integral structure. The pressure plate beams and the pressure plate beams are distributed perpendicularly to each other. Pressure plate through holes are provided at the pressure plate beams along their length.

[0005] This utility model discloses a special tool for disassembling internal combustion engine cylinder liners, which can effectively prevent cylinder liners from being broken or deformed during disassembly, and improve the efficiency of internal combustion engine maintenance. This special tool is lightweight, innovative, easy to use, time-saving, and labor-saving, thus improving the efficiency of internal combustion engine cylinder liner maintenance. Attached Figure Description

[0006] Figure 1 This is a perspective view of the present utility model.

[0007] Figure 2 This is a schematic diagram of the structure of this utility model.

[0008] Figure 3 This is a diagram showing the usage state of this utility model.

[0009] Figure 4 This is a side view of the present invention. Detailed Implementation

[0010] The present invention will now be further described with reference to the accompanying drawings.

[0011] This utility model discloses a special tool for disassembling cylinder liners of internal combustion engines, which differs from the prior art in that it includes a long screw 1, a short screw 7, a pressure plate 4, and a lifting block 9. The pressure plate 4 has a bolt hole at its center. The long screw 1 is longitudinally inserted through the bolt hole. The upper end of the long screw 1 is sequentially provided with a first movable nut 2 and a second movable nut 3. The lower end of the long screw 1 forms a downward-facing groove 17. The lower end of the long screw 1 is provided with a short screw 7. The upper end of the short screw 7 forms a rib 11 that mates with the groove 17. The rib 11 is disposed within the groove 17. The lower end of the long screw 1 and the upper end of the short screw 7 are movably connected by a flat-headed pin with a hole 5, which penetrates the groove at the lower end of the long screw 1. A pin hole is provided at position 17 and at the stiffener 11. The aforementioned flat-headed pin with a hole 5 is provided through the pin hole. A U-shaped locking pin 6 is provided in the through hole at the end of the flat-headed pin with a hole 5. A bolt hole is also provided at the center of the aforementioned lifting block 9. The aforementioned short screw 7 is provided through the bolt hole longitudinally. A first fixing nut 8 is provided at the upper part of the short screw 7. A second fixing nut 10 is provided at the lower part of the short screw 7. The pressure plate 4 consists of a transversely distributed pressure plate beam 12 and two longitudinally distributed pressure plate beams 13. The upper end of the pressure plate beam 13 is fixedly connected to the end of the pressure plate beam 12 to form an integral structure. The pressure plate beams 13 and the pressure plate beams 12 are distributed perpendicularly to each other. A pressure plate through hole 14 is provided at the pressure plate beam 13 along its length direction.

[0012] In a specific implementation, a pressure plate step 15 is formed at the pressure plate longitudinal beam 13, and the pressure plate step 15 is located on the inner side wall of the pressure plate longitudinal beam 13.

[0013] In a specific implementation, lifting block steps 16 are formed on both sides of the lifting block 9. The lifting block steps 16 are provided on the upper surfaces of both sides of the lifting block 9, and the edges of the lifting block steps 16 form arc surfaces 18.

[0014] This tool is used for removing cylinder liners during internal combustion engine maintenance. First, unscrew the first and second movable nuts on the long screw, insert the pressure plate into the long screw, and then screw the first and second movable nuts into the long screw of the integrated component, completing the assembly of this special tool. Next, insert the pressure plate with the through hole into the two diagonal bolts on the outer casing of the cylinder liner that were originally used to fix the cylinder head, thus fixing the pressure plate to both sides of the internal combustion engine cylinder liner. Simultaneously, during the process of the integrated component, consisting of the long screw, short screw, lifting block, etc., entering the cylinder liner, as... Figure 3 As shown, the upper end plate of the short screw is secured between the two wall plates at the lower end of the long screw via a flat-headed pin with a hole and a U-shaped retaining pin. Since the upper end plate of the short screw is a movable end, the lifting block fixed to the short screw can tilt and descend along the inner wall of the cylinder liner. Once the lifting block extends out of the cylinder liner, it returns to a horizontal position because it is no longer constrained by the inner wall of the cylinder liner. At this point, the long screw is moved back and forth radially to ensure that the long and short edges of the lifting block are between the inner and outer walls of the cylinder liner. Then, by continuously tightening the first and second movable nuts on the long screw downwards, the cylinder liner supported by the lifting block is slowly lifted out until maintenance personnel can remove the entire cylinder liner, completing the cylinder liner removal work.

[0015] Finally, loosen and unscrew the first and second movable nuts, remove the pressure plate from the long screw, screw the first and second movable nuts back into the long screw, and store the pressure plate and integrated component in a special toolbox.

[0016] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this utility model and should not be construed as limiting the specific implementation of this utility model to the above description. For those skilled in the art, for example, if the object being fixed is a circular object other than an energy storage device, or if the structures of the lower and upper supports of the energy storage device differ but the installation and fixing mechanism is the same, various simple deductions or substitutions can be made without departing from the concept of this utility model, and all such modifications and substitutions should be considered within the protection scope of this utility model.

Claims

1. A special tool for disassembling cylinder liners of internal combustion engines, characterized in that: The device includes a long screw (1), a short screw (7), a pressure plate (4), and a lifting block (9). The pressure plate (4) has a bolt hole at its center. The long screw (1) is longitudinally inserted through the bolt hole. The upper end of the long screw (1) is provided with a first movable nut (2) and a second movable nut (3) in sequence. The lower end of the long screw (1) forms a downward groove (17). The lower end of the long screw (1) is provided with a short screw (7). The upper end of the short screw (7) forms a rib plate (11) that cooperates with the groove (17). The rib plate (11) is set in the groove (17). The lower end of the long screw (1) and the upper end of the short screw (7) are movably connected by a flat-headed pin with a hole (5). The flat-headed pin with a hole (5) is inserted through the groove (17) at the lower end of the long screw (1) and at the rib plate (11). The above-mentioned flat-headed pin (5) with holes is provided through the pin hole. A U-shaped locking pin (6) is provided in the through hole at the end of the flat-headed pin (5). A bolt hole is also provided at the center of the above-mentioned lifting block (9). The above-mentioned short screw (7) is provided through the bolt hole in the longitudinal direction. A first fixing nut (8) is provided at the short screw (7) at the upper part of the short screw (7). A second fixing nut (10) is provided at the short screw (7) at the lower part of the short screw (7). The pressure plate (4) consists of a horizontally distributed pressure plate beam (12) and two longitudinally distributed pressure plate beams (13). The upper end of the pressure plate beam (13) is fixedly connected to the end of the pressure plate beam (12) to form an integral structure. The pressure plate beams (13) and the pressure plate beams (12) are distributed perpendicularly to each other. A pressure plate through hole (14) is provided at the pressure plate beam (13) along its length direction.

2. The special tool for disassembling cylinder liners of an internal combustion engine according to claim 1, characterized in that: A pressure plate step (15) is formed at the pressure plate longitudinal beam (13), and the pressure plate step (15) is located on the inner side wall of the pressure plate longitudinal beam (13).

3. A special tool for disassembling cylinder liners of an internal combustion engine according to claim 1, characterized in that: Both sides of the lifting block (9) are formed with lifting block step portions (16), which are provided on the upper surfaces of both sides of the lifting block (9), and the edges of the lifting block step portions (16) form arc surfaces (18).

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